old/ASM/intlist/INTERRUP.LST

Interrupt List                  Release 60              Last change 03jan99
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown

--------!---FLAGS----------------------------
The use of -> instead of = signifies that the indicated register or register
pair contains a pointer to the specified item, rather than the item itself.
Register pairs (such as AX:BX) indicate that the item is split across the
registers, with the high-order half in the first register.

One or more letters may follow the interrupt number; they have the following
meanings:  U - undocumented function, u - partially documented function,
P - available only in protected mode, R - available only in real or V86 mode,
C - callout or callback (usually hooked rather than called),
O - obsolete (no longer present in current versions)
--------!---CATEGORIES-----------------------
The ninth column of the divider line preceding an entry usually contains a
classification code (the entry has not been classified if that character is
a dash).  The codes currently in use are:
        A - applications, a - access software (screen readers, etc),
        B - BIOS, b - vendor-specific BIOS extensions,
        C - CPU-generated, c - caches/spoolers,
        D - DOS kernel, d - disk I/O enhancements,
        E - DOS extenders, e - electronic mail, F - FAX,
        f - file manipulation, G - debuggers/debugging tools, g - games,
        H - hardware, h - vendor-specific hardware,
        I - IBM workstation/terminal emulators, i - system info/monitoring,
        J - Japanese, j - joke programs,
        K - keyboard enhancers, k - file/disk compression,
        l - shells/command interpreters,
        M - mouse/pointing device, m - memory management,
        N - network, n - non-traditional input devices,
        O - other operating systems,
        P - printer enhancements, p - power management,
        Q - DESQview/TopView and Quarterdeck programs,
        R - remote control/file access, r - runtime support,
        S - serial I/O, s - sound/speech,
        T - DOS-based task switchers/multitaskers, t - TSR libraries
        U - resident utilities, u - emulators,
        V - video, v - virus/antivirus,
        W - MS Windows,
        X - expansion bus BIOSes, x - non-volatile config storage
        y - security, * - reserved (and not otherwise classified)
--------C-00---------------------------------
INT 00 C - CPU-generated - DIVIDE ERROR
Desc:   generated if the divisor of a DIV or IDIV instruction is zero or the
          quotient overflows the result register; DX and AX will be unchanged.
Notes:  on an 8086/8088, the return address points to the following instruction
        on an 80286+, the return address points to the divide instruction
        an 8086/8088 will generate this interrupt if the result of a division
          is 80h (byte) or 8000h (word)
SeeAlso: INT 04,OPCODE "AAD"
--------G-00---------------------------------
INT 00 - Zenith - ROM DEBUGGER
Desc:   invokes the ROM Debugger when at the BIOS level; equivalent to
          pressing Ctrl-Alt-Ins on booting.
Note:   since DOS revectors INT 00, it is necessary to restore this vector to
          its original ROM BIOS value in order to invoke the debugger once DOS
          loads
SeeAlso: INT 03"Columbia"
--------C-01---------------------------------
INT 01 C - CPU-generated - SINGLE STEP
Desc:   generated after each instruction if TF (trap flag) is set; TF is
          cleared on invoking the single-step interrupt handler
Notes:  interrupts are prioritized such that external interrupts are invoked
          after the INT 01 pushes CS:IP/FLAGS and clears TF, but before the
          first instruction of the handler executes
        used by debuggers for single-instruction execution tracing, such as
          MS-DOS DEBUG's T command
SeeAlso: INT 03"CPU"
--------C-01---------------------------------
INT 01 C - CPU-generated (80386+) - DEBUGGING EXCEPTIONS
Desc:   generated by the CPU on various occurrences which may be of interest
          to a debugger program
Note:   events which may trigger the interrupt:
          Instruction address breakpoint fault - will return to execute inst
          Data address breakpoint trap - will return to following instruction
          General detect fault, debug registers in use
          Task-switch breakpoint trap
          undocumented 386/486 opcode F1h - will return to following instruc
SeeAlso: INT 03"CPU"
--------H-02---------------------------------
INT 02 C - external hardware - NON-MASKABLE INTERRUPT
Desc:   generated by the CPU when the input to the NMI pin is asserted
Notes:  return address points to start of interrupted instruction on 80286+
        on the 80286+, further NMIs are disabled until the next IRET
          instruction, but one additional NMI is remembered by the hardware
          and will be serviced after the IRET instruction reenables NMIs
        maskable interrupts may interrupt the NMI handler if interrupts are
          enabled
        although the Intel documentation states that this interrupt is
          typically used for power-failure procedures, it has many other uses
          on IBM-compatible machines:
                Memory parity error: all except Jr, CONV, and some machines
                                  without memory parity
                Breakout switch on hardware debuggers
                Coprocessor interrupt: all except Jr and CONV
                Keyboard interrupt: Jr, CONV
                I/O channel check: CONV, PS50+
                Disk-controller power-on request: CONV
                System suspend: CONV
                Real-time clock: CONV
                System watch-dog timer, time-out interrupt: PS50+
                DMA timer time-out interrupt: PS50+
                Low battery: HP 95LX
                Module pulled: HP 95LX
--------m-02----SI0714-----------------------
INT 02 U - STB RAPIDMAP.SYS - ???
        SI = 0714h
        ES:DI -> ???
Return: ???
SeeAlso: INT 67/AX=6100h"STB",PORT 00E1h"STB"
--------C-03---------------------------------
INT 03 C - CPU-generated - BREAKPOINT
Desc:   generated by the one-byte breakpoint instruction (opcode CCh)
Notes:  used by debuggers to implement breakpoints, such as MS-DOS DEBUG's G
          command
        also used by Turbo Pascal versions 1,2,3 when {$U+} specified
        return address points to byte following the breakpoint instruction
        called by Novell DOS 7 EMM386 after displaying an exception error
          message (GPF, illegal opcodes, etc.) and before waiting for user
          input
        called by QEMM-386 if the user presses 'I' (undocumented) when prompted
          after an exception error message
SeeAlso: INT 01"CPU"
--------G-03---------------------------------
INT 03 - Columbia PCs (desktop,VP portables) - ROM DEBUGGER
Desc:   invokes the ROM Debugger if INT 03 has not been revectored; equivalent
          to pressing Esc on booting.
SeeAlso: INT 00"Zenith",INT 03"Realia"
--------G-03---------------------------------
INT 03 - Realia COBOL - DEBUGGER SUPPORT
Note:   Realia COBOL checks for a signature eight bytes prior to the interrupt
          handler when it starts up
BUG:    if the offset of the INT 03 vector is less than 8, the compiler and
          all executables generated by it will crash the system
SeeAlso: INT 03"Columbia"
--------G-03---------------------------------
INT 03 U - Watcom WVIDEO, Watcom WD - OUTPUT DEBUGGING MESSAGE
        STACK:  DWORD   selector
                DWORD   offset of ASCIZ message to display
Notes:  the INT 03h instruction which invokes the debugger must be followed by
          a JMP SHORT and the signature string "WVIDEO"
        to check whether this interface is available, define a public byte
          variable named ___WD_Present, which the debugger will set to 01h
          before running the program
SeeAlso: AX=0910h
--------U-03---------------------------------
INT 03 - DTown Utilities - POP UP
Program: DTown Software Development's DTown Utilities contains various tools
          which are useful to programmers, such as a memory viewer and
          disassembler
Note:   DTU pops up on INT 03 (if not hooked by a debugger) to allow the
          user to inspect memory or code when the machine crashes; various
          memory managers will invoke INT 03 when displaying a CPU exception
          error message (either automatically or when the user presses a
          particular key)
SeeAlso: INT 2D/AL=20h"DTown"
--------G-030000-----------------------------
INT 03 - Soft-ICE - BACK DOOR COMMANDS - GET Soft-ICE VERSION
        AX = 0000h
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
Return: SI = BCD version (0280h = v2.80)
SeeAlso: INT 03/AX=0910h
--------G-0301-------------------------------
INT 03 - Soft-ICE - BACK DOOR COMMANDS - ???
        AH = 01h
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
Return: ???
SeeAlso: AX=0000h,AX=090Bh,INT 03/AH=10h
--------G-030900-----------------------------
INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ???
        AX = 0900h
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
        DS:BX -> ???
        CX = ???
        DX = ???
Return: ???
SeeAlso: AX=0000h,AH=01h,AX=0902h,AX=0914h
--------G-030902-----------------------------
INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - POPUP & START A DEBUG SESSION
        AX = 0902h
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
        DS:BX -> initial register values (see #00001)
Return: registers as specified in initial register values table
Note:   This function is called by LDR.EXE in loading a program to
          be debugged. After executing the function, Soft-ICE pops up its
          debugging window and you may start debugging your program.
Return: ???
SeeAlso: AX=0000h,AX=090Ah,AX=0910h,AX=0914h

Format of Soft-ICE initial register values:
Offset  Size    Description     (Table 00001)
 00h    WORD    initial value of SP
 02h    WORD    initial value of SS
 04h    WORD    initial value of IP
 06h    WORD    initial value of CS
 08h    WORD    initial value of DS and ES
 0Ah    WORD    ???
 0Ch    WORD    ???
 0Eh    WORD    ???
 10h    WORD    initial value of AX
 12h    WORD    ??? (defaults to 000AH ???)
 14h    WORD    ??? (defaults to 0001H ???)
 16h    WORD    ??? (defaults to 0100H ???)
--------G-030903-----------------------------
INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ???
        AX = 0903h
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
        DS:BX -> ???
        CX = ???
        DX = ???
Return: ???
SeeAlso: AX=0000h,AX=0902h,AX=0907h,AX=0914h
--------G-030907-----------------------------
INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ???
        AX = 0907h
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
        DS:BX -> ???
        CX = ???
        DX = ???
Return: ???
SeeAlso: AX=0000h,AX=0903h,AX=090Ah,AX=0914h
--------G-03090A-----------------------------
INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ???
        AX = 090Ah
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
        DS:BX -> ???
        CX = ???
        DX = ???
Return: ???
SeeAlso: AX=0000h,AX=0907h,AX=090Bh,AX=0914h
--------G-03090B-----------------------------
INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ???
        AX = 090Bh
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
        DS:BX -> ???
        CX = ???
        DX = ???
Return: ???
SeeAlso: AX=0000h,AX=090Ah,AX=0910h,AX=0914h
--------G-030910-----------------------------
INT 03 - Soft-ICE - BACK DOOR COMMANDS - DISPLAY STRING IN Soft-ICE WINDOW
        AX = 0910h
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
        DS:DX -> ASCIZ string to display (max 100 bytes, 0Dh OK)
Program: Soft-ICE is a debugger by Nu-Mega Technologies, Inc.
SeeAlso: INT 03"WVIDEO"
--------G-030911-----------------------------
INT 03 - Soft-ICE - BACK DOOR COMMANDS - EXECUTE Soft-ICE COMMAND
        AX = 0911h
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
        DS:DX -> ASCIZ command string (max 100 bytes, 0Dh OK)
Return: nothing
SeeAlso: AX=0912h,AX=0913h
--------G-030912-----------------------------
INT 03 - Soft-ICE - BACK DOOR COMMANDS - GET BREAKPOINT INFORMATION
        AX = 0912h
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
Return: BH = entry number of last breakpoint set
        BL = type of last breakpoint set (see #00002)
        DH = entry number of last breakpoint to be triggered
        DL = type of last triggered breakpoint (see #00002)
Program: Soft-ICE is a debugger by Nu-Mega Technologies, Inc.
SeeAlso: AX=0911h,AX=0913h,AX=0914h

(Table 00002)
Values for Soft-ICE breakpoint type:
 00h    BPM (breakpoint register types)
 01h    I/O
 02h    INTerrupt
 03h    BPX (INT 03-style breakpoint)
 04h    reserved
 05h    range
--------G-030913-----------------------------
INT 03 - Soft-ICE v2.5x - BACK DOOR COMMANDS - SET Soft-ICE BREAKPOINT
        AX = 0913h
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
        DS:DX -> breakpoint structure (see #00003)
Return: AX = status
            00h successful
                BX = breakpoint number
            03h breakpoint table full
            06h memory limit error
            07h I/O limit error
            09h range limit error
            16h duplicate breakpoint
SeeAlso: AX=0911h,AX=0912h,AX=0914h

Format of Soft-ICE breakpoint structure:
Offset  Size    Description     (Table 00003)
 00h    BYTE    breakpoint type (see #00004)
 01h    DWORD   breakpoint address 1
                (lower range limit for memory BPs,
                interrupt number for interrupt BPs,
                address of BP for execution BPs,
                I/O address (only word) for I/O BPs)
 05h    DWORD   breakpoint address 2
                (upper range limit for memory BPs,
                optional value to check for for interrupt BPs,
                overlay number (0 = root) for execution BPs)
 09h    DWORD   breakpoint address 3
 0Dh    BYTE    breakpoint mode 1 (see #00005)
                (for interrupt BPs = register to check
                    00h  no value checking
                    01h  check AL
                    02h  check AH
                    03h  check AX)
 0Eh    BYTE    breakpoint mode 2 (see #00005)
 0Fh    BYTE    breakpoint size (00h byte, 01h word, 03h dword)
 10h    BYTE    breakpoint pass count before program stop
 11h    BYTE    breakpoint state
Note:   all unused fields should contain zeros

(Table 00004)
Values for Soft-ICE breakpoint type:
 00h    memory location
 01h    memory range
 03h    I/O
 04h    interrupt
 05h    execution break

(Table 00005)
Values for Soft-ICE breakpoint mode:
 01h    read
 02h    write
 04h    execution
--------G-030914-----------------------------
INT 03 - Soft-ICE v2.5x - BACK DOOR COMMANDS - REMOVE Soft-ICE BREAKPOINT
        AX = 0914h
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
        BX = breakpoint number (returned by AX=0913h)
Return: BX = ???
Program: Soft-ICE is a debugger by Nu-Mega Technologies, Inc.
SeeAlso: AX=0912h,AX=0913h
--------G-030918-----------------------------
INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ???
        AX = 0918h
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
        DS:BX -> ???
        CX = ???
        DX = ???
Return: ???
SeeAlso: INT 03/AX=0000h,INT 03/AX=0910h,INT 03/AX=0914h,INT 03/AH=10h
--------G-0310-------------------------------
INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ???
        AH = 10h
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
Return: ???
SeeAlso: INT 03/AX=0000h,INT 03/AX=0910h,INT 03/AH=01h,INT 03/AH=11h
--------G-0311-------------------------------
INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ???
        AH = 11h
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
Return: none???
SeeAlso: INT 03/AX=0000h,INT 03/AX=0910h,INT 03/AH=10h,INT 03/AX=130Ch
--------G-03130C-----------------------------
INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ???
        AX = 130Ch
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
        BX = ???
        CX = ???
        DX = ???
Return: AX = ??? (1300h)
SeeAlso: INT 03/AX=0000h,INT 03/AX=0910h,INT 03/AH=11h,INT 03/AX=130Eh
--------G-03130E-----------------------------
INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ???
        AX = 130Eh
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
        BX = ???
        CX = ???
        DX = ???
Return: AX = ??? (1300h)
SeeAlso: INT 03/AX=0000h,INT 03/AX=0910h,INT 03/AX=130Ch,INT 03/AX=1313h
--------G-031313-----------------------------
INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ???
        AX = 1313h
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
        BX = ???
        CX = ???
        DX = ???
Return: AX = ??? (1300h)
SeeAlso: INT 03/AX=0000h,INT 03/AX=0910h,INT 03/AX=130Eh
--------G-030900-----------------------------
INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ???
        AX = 0900h
        SI = magic value 4647h ('FG')
        DI = magic value 4A4Dh ('JM')
Return: none???
SeeAlso: INT 03/AX=0000h,INT 03/AX=0910h,INT 03/AH=10h,INT 03/AH=12h
--------C-04---------------------------------
INT 04 C - CPU-generated - INTO DETECTED OVERFLOW
Desc:   the INTO instruction will generate this interrupt if OF (Overflow Flag)
          is set; otherwise, INTO is effectively a NOP
Note:   may be used for convenient overflow testing (to prevent errors from
          propagating) instead of JO or a JNO/JMP combination
SeeAlso: INT 00"CPU",OPCODE "AAD",OPCODE "AAM"
--------B-05---------------------------------
INT 05 - PRINT SCREEN
Desc:   dump the current text screen to the first printer
Notes:  normally invoked by the INT 09 handler when PrtSc key is pressed, but
          may be invoked directly by applications
        byte at 0050h:0000h contains status used by default handler
          00h not active
          01h PrtSc in progress
          FFh last PrtSc encountered error
        default handler is at F000h:FF54h in IBM PC and 100%-compatible BIOSes
        since the BOUND instruction also calls INT 05h, but returns control
          to the BOUND instruction, a failed BOUND check will cause an infinite
          loop of PrtScreens unless the INT 05 handler is aware of the problem
          and checks whether the interrupt was invoked by a BOUND instruction
BUG:    some old BIOSes/applications appear to destroy BP on return
SeeAlso: INT 10/AH=12h/BL=20h,INT 4A"Tandy 2000",INT 5E"TI Professional"
SeeAlso: INT 80"Phar Lap"
--------C-05---------------------------------
INT 05 C - CPU-generated (80186+) - BOUND RANGE EXCEEDED
Desc:   generated by BOUND instruction when the value to be tested is less than
          the indicated lower bound or greater than the indicated upper bound.
Note:   returning from this interrupt re-executes the failing BOUND instruction
--------P-05454A-----------------------------
INT 05 U - PSPS v2.01 - EJECT PAGE
        AX = 454Ah ('EJ')
Program: PSPS is shareware PostScript PrintScreen utility by A.N.D.
          Technologies
Note:   sends a ^D to the current printer
SeeAlso: AX=4E57h,AX=5053h,AX=554Eh
--------P-054E57-----------------------------
INT 05 U - PSPS v2.01 - SET PARAMETERS
        AX = 4E57h ('NW')
        ES:SI -> 11-byte buffer containing new settings
Return: buffer filled
SeeAlso: AX=454Ah,AX=5053h,INT 17/AH=63h
--------P-055053-----------------------------
INT 05 U - PSPS v2.01 - GET PARAMETERS
        AX = 5053h ('PS')
        ES:SI -> 11-byte buffer for settings
Return: buffer filled
SeeAlso: AX=4E57h,AX=554Eh,INT 17/AH=64h
--------P-05554E-----------------------------
INT 05 U - PSPS v2.01 - UNINSTALL
        AX = 554Eh ('UN')
Program: PSPS is shareware PostScript PrintScreen utility by A.N.D.
          Technologies
SeeAlso: AX=454Ah,AX=4E57h,INT 17/AH=62h
--------C-06---------------------------------
INT 06 C - CPU-generated (80286+) - INVALID OPCODE
Desc:   this interrupt is generated when the CPU attempts to execute an
          invalid opcode (most protected-mode instructions are considered
          invalid in real mode) or a BOUND, LDS, LES, or LIDT instruction
          which specifies a register rather than a memory address
Notes:  return address points to beginning of invalid instruction
        with proper programming, this interrupt may be used to emulate
          instructions which do not exist; many 386 BIOSes emulate the 80286
          undocumented LOADALL instruction which was removed from the 80386+
        generated by the 80386+ when the LOCK prefix is used with instructions
          other than BTS, BTR, BTC, XCHG, XADD (486), CMPXCHG (486), INC, DEC,
          NOT, NEG, ADD, ADC, SUB, SBB, AND, OR, or XOR, or any instruction
          not accessing memory.
SeeAlso: INT 0C"CPU",INT 0D"CPU"
--------b-06---------------------------------
INT 06 C - HP 95LX - SLEEP/WAKEUP
Desc:   this interrupt is called just before going into light or deep
          (shutdown) sleep and just after returning from light or deep sleep
SeeAlso: INT 0B"HP 95LX",INT 15/AX=4DD4h,INT 15/AH=4Eh
--------V-06---------------------------------
INT 06 U - no-name clone - GRAPHICS CHARACTER TABLE (NOT A VECTOR!)
Desc:   points at graphics data for characters 00h-7Fh of the current font
SeeAlso: INT 43"EGA",INT 44"VIDEO"
--------C-07---------------------------------
INT 07 C - CPU-generated (80286+) - PROCESSOR EXTENSION NOT AVAILABLE
Desc:   this interrupt is automatically called if a coprocessor instruction is
          encountered when no coprocessor is installed
Note:   can be used to emulate a numeric coprocessor in software
SeeAlso: INT 09"CPU"
--------H-08---------------------------------
INT 08 C - IRQ0 - SYSTEM TIMER
Desc:   generated 18.2 times per second by channel 0 of the 8254 system timer,
          this interrupt is used to keep the time-of-day clock updated
Notes:  programs which need to be invoked regularly should use INT 1C unless
          they need to reprogram the timer while still keeping the time-of-day
          clock running at the proper rate
        default handler is at F000h:FEA5h in IBM PC and 100%-compatible BIOSes
        may be masked by setting bit 0 on I/O port 21h
SeeAlso: INT 1C,INT 4A"SYSTEM",INT 50"DESQview",INT 58"DoubleDOS",INT 70"IRQ8"
SeeAlso: INT 78"GO32",INT D8"Screen Thief",MEM 0040h:0040h,MEM 0040h:006Ch
--------C-08---------------------------------
INT 08 C - CPU-generated (80286+) - DOUBLE EXCEPTION DETECTED
Desc:   called when multiple exceptions occur on one instruction, or an
          exception occurs in an exception handler
Notes:  called in protected mode if an interrupt above the defined limit of
          the interrupt vector table occurs
        return address points at beginning of instruction with errors or the
          beginning of the instruction which was about to execute when the
          external interrupt caused the exception
        if an exception occurs in the double fault handler, the CPU goes into
          SHUTDOWN mode (which circuitry in the PC/AT converts to a reset);
          this "triple fault" is a faster way of returning to real mode on
          many 80286 machines than the standard keyboard controller reset
--------H-09---------------------------------
INT 09 C - IRQ1 - KEYBOARD DATA READY
Desc:   this interrupt is generated when data is received from the keyboard.
          This is normally a scan code (from either a keypress *or* a key
          release), but may also be an ACK or NAK of a command on AT-class
          keyboards.
Notes:  this IRQ may be masked by setting bit 1 on I/O port 21h
        if the BIOS supports an enhanced (101/102-key) keyboard, it calls
          INT 15/AH=4Fh after reading the scan code (see #00006) from the
          keyboard and before further processing; all further processing uses
          the scan code returned from INT 15/AH=4Fh
        the default interrupt handler is at F000h:E987h in 100%-compatible
          BIOSes
        the interrupt handler performs the following actions for certain
          special keystrokes:
            Ctrl-Break   clear keyboard buffer, place word 0000h in buffer,
                         invoke INT 1B, and set flag at 0040h:0071h
            SysReq       invoke INT 15/AH=85h (SysReq is often labeled SysRq)
            Ctrl-Numlock place system in a tight wait loop until next INT 09
            Ctrl-Alt-Del jump to BIOS startup code (either F000h:FFF0h or the
                           destination of the jump at that address)
            Shift-PrtSc  invoke INT 05
            Ctrl-Alt-Plus (HP Vectra) enable keyclick
            Ctrl-Alt-Plus (many clones) set clock speed to high
            Ctrl-Alt-Minus (HP Vectra) reduce keyclick volume
            Ctrl-Alt-Minus (many clones) set clock speed to low
            Ctrl-Alt-SysReq (HP Vectra) generate hard reset
            Ctrl-Alt-S  (many clones) run BIOS setup program
            Ctrl-Alt-Esc (many clones) run BIOS setup program
            Ctrl-Alt-Ins (many clones) run BIOS setup program
            Ctrl-Alt-LeftShift-GrayMinus (some clones) turn off system cache
            Ctrl-Alt-LeftShift-GrayPlus (some clones) turn on system cache
        DR DOS hooks this interrupt to control the cursor shape (underscore/
          half block) for overwrite/insert mode
        DR Multiuser DOS hooks this interrupt for cursor shape control and to
          control whether Ctrl-Alt-Del reboots the current session or the
          entire system
SeeAlso: INT 05"PRINT SCREEN",INT 0B"HP 95LX",INT 15/AH=4Fh,INT 15/AH=85h
SeeAlso: INT 16/AH=00h,INT 16/AH=10h,INT 1B,INT 2F/AX=A901h,INT 4A/AH=00h"TI"
SeeAlso: INT 51"DESQview",INT 59"DoubleDOS",INT 79"GO32"

(Table 00006)
Values for keyboard make/break (scan) code:
 01h    Esc              31h    N
 02h    1 !              32h    M
 03h    2 @              33h    , <              63h    F16
 04h    3 #              34h    . >              64h    F17
 05h    4 $              35h    / ?              65h    F18
 06h    5 %              36h    Right Shift      66h    F19
 07h    6 ^              37h    Grey*            67h    F20
 08h    7 &              38h    Alt              68h    F21 (Fn) [*]
 09h    8 *              39h    SpaceBar         69h    F22
 0Ah    9 (              3Ah    CapsLock         6Ah    F23
 0Bh    0 )              3Bh    F1               6Bh    F24
 0Ch    - _              3Ch    F2               6Ch    --
 0Dh    = +              3Dh    F3               6Dh    EraseEOF
 0Eh    Backspace        3Eh    F4
 0Fh    Tab              3Fh    F5               6Fh    Copy/Play
 10h    Q                40h    F6
 11h    W                41h    F7
 12h    E                42h    F8               72h    CrSel
 13h    R                43h    F9               73h    <delta> [*]
 14h    T                44h    F10              74h    ExSel
 15h    Y                45h    NumLock          75h    --
 16h    U                46h    ScrollLock       76h    Clear
 17h    I                47h    Home             77h    [Note2] Joyst But1
 18h    O                48h    UpArrow          78h    [Note2] Joyst But2
 19h    P                49h    PgUp             79h    [Note2] Joyst Right
 1Ah    [ {              4Ah    Grey-            7Ah    [Note2] Joyst Left
 1Bh    ] }              4Bh    LeftArrow        7Bh    [Note2] Joyst Up
 1Ch    Enter            4Ch    Keypad 5         7Ch    [Note2] Joyst Down
 1Dh    Ctrl             4Dh    RightArrow       7Dh    [Note2] right mouse
 1Eh    A                4Eh    Grey+            7Eh    [Note2] left mouse
 1Fh    S                4Fh    End
 20h    D                50h    DownArrow
 21h    F                51h    PgDn
 22h    G                52h    Ins
 23h    H                53h    Del
 24h    J                54h    SysReq          ---non-key codes---
 25h    K                55h    [Note1] F11      00h    kbd buffer full
 26h    L                56h    left \| (102-key)
 27h    ; :              57h    F11              AAh    self-test complete
 28h    ' "              58h    F12              E0h    prefix code
 29h    ` ~              59h    [Note1] F15      E1h    prefix code
 2Ah    Left Shift       5Ah    PA1              EEh    ECHO
 2Bh    \ |              5Bh    F13 (LWin)       F0h    prefix code (key break)
 2Ch    Z                5Ch    F14 (RWin)       FAh    ACK
 2Dh    X                5Dh    F15 (Menu)       FCh    diag failure (MF-kbd)
 2Eh    C                                        FDh    diag failure (AT-kbd)
 2Fh    V                                        FEh    RESEND
 30h    B                                        FFh    kbd error/buffer full
Notes:  scan codes 56h-E1h are only available on the extended (101/102-key)
          keyboard and Host Connected (122-key) keyboard; scan codes 5Bh-5Dh
          are only available on the 122-key keyboard and the Microsoft Natural
          Keyboard; scan codes 5Eh-76h are only available on the 122-key
          keyboard
        in the default configuration, break codes are the make scan codes with
          the high bit set; make codes 60h,61h,70h, etc. are not available
          because the corresponding break codes conflict with prefix codes
          (code 2Ah is available because the self-test result code AAh is only
          sent on keyboard initialization).  An alternate keyboard
          configuration can be enabled on AT and later systems with enhanced
          keyboards, in which break codes are the same as make codes, but
          prefixed with an F0h scan code
        prefix code E0h indicates that the following make/break code is for a
          "gray" duplicate to a key which existed on the original PC keyboard;
          prefix code E1h indicates that the following make code has no
          corresponding break code (currently only the Pause key generates no
          break code)
        the Microsoft Natural Keyboard sends make codes 5Bh, 5Ch, and 5Dh
          (all with an E0h prefix) for the Left Windows, Right Windows, and
          Menu keys on the bottom row
        the European "Cherry G81-3000 SAx/04" keyboard contains contacts for
          four additional keys, which can be made available by a user
          modification; the three new keys located directly below the cursor
          pad's Delete, End, and PgDn keys send make codes 66h-68h (F19-F21);
          the fourth new key, named <delta>, sends make code 73h
        the SysReq key is often labeled SysRq
        the "Accord" ergonomic keyboard with optional touchpad (no other
          identification visible on keyboard or in owner's booklet) has an
          additional key above the Grey- key marked with a left-pointing
          triangle and labeled "Fn" in the owner's booklet which returns
          scan codes E0h 68h on make and E0h E8h on break
        the "Preh Commander AT" keyboard with additional F11-F22 keys treats
          F11-F20 as Shift-F1..Shift-F10 and F21/F22 as Ctrl-F1/Ctrl-F2; the
          Eagle PC-2 keyboard with F11-F24 keys treated those additional keys
          in the same way
        [Note1] the "Cherry G80-0777" keyboard has additional F11-F15 keys
          which generate make codes 55h-59h; some other extended keyboards
          generate codes 55h and 56h for F11 and F12, which cannot be managed
          by standard DOS keyboard drivers
        [Note2] the Schneider/Amstrad PC1512 PC keyboards contain extra keys,
          a mouse, and a digital joystick, which are handled like extra keys.
          The joystick's motion scancodes are converted into standard arrow
          keys by the BIOS, and the joystick and mouse button scan codes are
          converted to FFFFh codes in the BIOS keyboard buffer
          (see CMOS 15h"AMSTRAD").
          In addition to the keys listed in the table above, there are
            Del-> (delete forward)      70h
            Enter                       74h
SeeAlso: #00602 at INT 16/AX=6F07h,#03214 at INT 4A/AH=05h
--------C-09---------------------------------
INT 09 C - CPU-generated (80286,80386) - PROCESSOR EXTENSION PROTECTION ERROR
Desc:   called if the coprocessor attempts to access memory outside a segment
          boundary; it may occur at an arbitrary time after the coprocessor
          instruction was issued
Notes:  until the condition is cleared or the coprocessor is reset, the only
          coprocessor instruction which may be used is FNINIT; WAIT or other
          coprocessor instructions will cause a deadlock because the
          coprocessor is still busy waiting for data
        for the 486+, a coprocessor protection error generates an INT 0D
SeeAlso: INT 07"CPU"
--------*-09---------------------------------
INT 09 P - internal hardware - RESERVED BY Intel (80486)
Note:   this exception has been moved to INT 0D
SeeAlso: INT 09"CPU",INT 0D
--------H-0A---------------------------------
INT 0A C - IRQ2 - LPT2 (PC), VERTICAL RETRACE INTERRUPT (EGA,VGA)
Notes:  the TOPS and PCnet adapters use this interrupt request line by default
        DOS 3.2 revectors IRQ2 to a stack-switching routine
        on ATs and above, the physical data line for IRQ2 is labeled IRQ9 and
          connects to the slave 8259.  The BIOS redirects the interrupt for
          IRQ9 back here.
        under DESQview, only the INT 15h vector and BASIC segment address (the
          word at 0000h:0510h) may be assumed to be valid for the handler's
          process
        many VGA boards do not implement the vertical retrace interrupt,
          including the IBM VGA Adapter where the traces are either cut or
          removed
SeeAlso: INT 52"DESQview",INT 5A"DoubleDOS",INT 71,INT 7A"GO32"
--------H-0A---------------------------------
INT 0A C - IRQ2 - Tandy 1000-series HARD DISK
Notes:  this interrupt may be masked by setting bit 2 on I/O port 21h
        the Tandy 1000, 1000A, and 1000HD use IRQ2 for the hard disk; the
          1000EX, HX, RLX, RLX-HD, RLX-B, RLX-HD-B use IRQ5 instead; the
          1000RL, RL-HD, SL, SL/2, TL, TL/2, and TL/3 are jumper-selectable
          for either IRQ2 or IRQ5 (default IRQ5); the 1000SX and TX are
          DIP-switch selectable for IRQ2 or IRQ5 (default IRQ2); the RSX and
          RSX-HD use IRQ14.  Tandy systems which use IRQ2 for the hard disk
          interrupt use IRQ5 for vertical retrace.
SeeAlso: INT 52"DESQview",INT 5A"DoubleDOS",INT 71
--------H-0A---------------------------------
INT 0A - IRQ2 - ROLAND MPU MIDI INTERFACE
Note:   newer Roland cards and MIDI interfaces by other manufacturers use
          a jumper-selectable IRQ, but software and hardware generally defaults
          to IRQ2
SeeAlso: INT 52"DESQview",INT 5A"DoubleDOS",INT 71,INT 7A"GO32"
--------C-0A---------------------------------
INT 0A CP - CPU-generated (80286+) - INVALID TASK STATE SEGMENT
Desc:   automatically called during a task switch if the new TSS specified by
          the task gate is invalid for any of the following reasons:
                TSS limit is less than 43 (80286) or 103 (80386/80486)
                LDT selector invalid or segment not present
                null SS selector, or SS selector outside LDT/GDT limit
                stack segment is read-only
                stack segment DPL differs from new CPL, or RPL <> CPL
                CS selector is outside LDT/GDT limit or not code
                non-conforming code segment's DPL differs from CPL
                conforming code segment's DPL > CPL
                DS/ES selectors outside LDT/GDT limit or not readable segments
Note:   the handler must use a task gate in order to have a valid TSS under
          which to execute; it must also reset the busy bit in the new TSS
SeeAlso: INT 0B"CPU"
--------H-0B---------------------------------
INT 0B C - IRQ3 - SERIAL COMMUNICATIONS (COM2)
Desc:   automatically asserted by the UART when COM2 needs attention, if the
          UART has been programmed to generate interrupts
Notes:  the TOPS and PCnet adapters use this interrupt request line as an
          alternate
        on PS/2s, COM2 through COM8 share this interrupt; on many PC's, COM4
          shares this interrupt
        may be masked by setting bit 3 on I/O port 21h
SeeAlso: INT 0C"COM1",INT 53"DESQview",INT 5B"DoubleDOS",INT 7B"GO32"
--------C-0B---------------------------------
INT 0B CP - CPU-generated (80286+) - SEGMENT NOT PRESENT
Desc:   generated when loading a segment register if the segment descriptor
          indicates that the segment is not currently in memory, unless the
          segment is an LDT (see INT 0A"CPU") or stack segment (see
          INT 0C"CPU") needed by a task switch
Note:   may be used to implement virtual memory by loading in segments as they
          are accessed, clearing the "not present" bit after loading
SeeAlso: INT 0A"CPU",INT 0E"CPU"
--------h-0B---------------------------------
INT 0B - HP 95LX - LOW-LEVEL KEYBOARD HANDLER
Desc:   this is the lowest-level keyboard handler on an HP 95LX palmtop
Note:   debounces key, places the keycode in I/O register 60h, and calls INT 09
SeeAlso: INT 09,INT 0D"HP 95LX",INT 15/AX=4DD4h
--------H-0C---------------------------------
INT 0C C - IRQ4 - SERIAL COMMUNICATIONS (COM1)
Desc:   automatically asserted by the UART when COM1 needs attention, if the
          UART has been programmed to generate interrupts
BUG:    this vector is modified but not restored by Direct Access v4.0, and
          may be left dangling by other programs written with the same version
          of compiled BASIC
Notes:  on many PC's, COM3 shares this interrupt
        may be masked by setting bit 4 on I/O port 21h
SeeAlso: INT 0B"COM2",INT 54"DESQview",INT 5C"DoubleDOS",INT 7C"GO32"
--------C-0C---------------------------------
INT 0C C - CPU-generated (80286+) - STACK FAULT
Desc:   this interrupt is generated in protected mode on a stack overflow or
          underflow, or if an inter-level transition or task switch references
          a stack segment marked "not present"; it is generated in real mode
          on accessing a word operand at SS:FFFFh
Note:   the 80286 will shut down in real mode if SP=1 before a push.  On the
          PC AT and compatibles, external circuitry generates a reset on
          shutdown.
SeeAlso: INT 0B"CPU",INT 0D"CPU"
--------I-0C---------------------------------
INT 0C - IBM SYSTEM 36/38 WORKSTATION EMULATION - API POINTER
Desc:   the IBM System 36/38 emulator may be invoked through a private API,
          whose entry point address (see #00007) is offset 100h in the segment
          pointed at by this vector

(Table 00007)
Call the System 36/38 emulator API entry point with:
        AH = function
            03h update screen
            05h select next session
                AL = session number (00h-03h)
                Return: AL = session type code
                            00h not active
                            01h display session
                            02h printer session
                            FEh invalid session number
                        DS = requested session's data segment (0 if not active)
                            (see #00008)
Return: ???

Format of System 36/38 emulator's data area:
Offset  Size    Description     (Table 00008)
13Eh    BYTE    bit flags for status line indicators turned on since this byte
                last zerod
13Fh    BYTE    bit flags for status line indicators turned off since this
                byte last set to FFh
140h    WORD    offset of EBCDIC to ASCII translation
146h    WORD    offset of EBCDIC screen buffer
148h    WORD    offset of EC (engineering change) level signature
150h    BYTE    "KEYI"
151h    BYTE    5250 key scan code to be sent to remote
15Bh    BYTE    "SYSAV"
15Dh    BYTE    5250 cursor column
15Eh    BYTE    5250 cursor row
167h    BYTE    "DVCTAD"
178h    BYTE    "FLAGS"
184h    BYTE    "SESSNOAD"
193h    BYTE    "STNAD"
198h    BYTE    "NSDS"
Note:   offsets are from the interrupt handler's segment
--------H-0D---------------------------------
INT 0D C - IRQ5 - FIXED DISK (PC,XT), LPT2 (AT), reserved (PS/2)
Notes:  under DESQview, only the INT 15h vector and BASIC segment address (the
          word at 0000h:0510h) may be assumed to be valid for the handler's
          process
        the Tandy 1000, 1000A, and 1000HD use IRQ2 for the hard disk; the
          1000EX, HX, RLX, RLX-HD, RLX-B, RLX-HD-B use IRQ5 instead; the
          1000RL, RL-HD, SL, SL/2, TL, TL/2, and TL/3 are jumper-selectable
          for either IRQ2 or IRQ5 (default IRQ5); the 1000SX and TX are
          DIP-switch selectable for IRQ2 or IRQ5 (default IRQ2); the RSX and
          RSX-HD use IRQ14.  Tandy systems which use IRQ2 for the hard disk
          interrupt use IRQ5 for vertical retrace.
        may be masked by setting bit 5 on I/O port 21h
SeeAlso: INT 0E"IRQ6",INT 0F"IRQ7",INT 55"DESQview",INT 5D"DoubleDOS"
SeeAlso: INT 7D"GO32"
--------H-0D---------------------------------
INT 0D C - IRQ5 - Tandy 1000 60 Hz RAM REFRESH
Desc:   used to ensure that the dynamic RAM retains its contents in earlier
          1000-series models; later models use normal DMA for RAM refresh
          (some early models have no DMA unless it is added via an expansion
          card)
SeeAlso: INT 55
--------h-0D---------------------------------
INT 0D - HP 95LX - INFRARED INTERRUPT
Desc:   this interrupt is used to perform communications over the infrared
          data link
SeeAlso: INT 0B"HP 95LX",INT 0E"HP 95LX",INT 15/AX=4DD4h
--------C-0D---------------------------------
INT 0D C - CPU-generated (80286+) - GENERAL PROTECTION VIOLATION
Desc:   the CPU generates this interrupt when it detects a protection violation
          which does not fit under any other category having a separate
          interrupt
Notes:  called in real mode when
            an instruction accesses a memory operand extending beyond offset
              FFFFh (i.e. WORD at FFFFh or DWORD at FFFDh or higher) in segment
              CS, DS, ES, FG, or GS
            a PUSH MEM or POP MEM instruction contains an invalid bit encoding
              in the second byte
            an instruction exceeds the maximum length allowed (10 bytes for
              80286, 15 bytes for 80386/80486)
            an instruction wraps from offset FFFFh to offset 0000h
        called in protected mode on protection violations not covered by INT 06
          through INT 0C, including
            segment limit violations
            write to read-only segments
            accesses using null DS or ES selectors
            accesses to segments with privilege greater than CPL
            wrong descriptor type
        called on 80486 protected-mode floating-point protection fault
SeeAlso: INT 09"80486",INT 0C"STACK"
--------H-0E---------------------------------
INT 0E C - IRQ6 - DISKETTE CONTROLLER
Desc:   this interrupt is generated by the floppy disk controller on
          completion of an operation
Notes:  default handler is at F000h:EF57h in IBM PC and 100%-compatible BIOSes
        may be masked by setting bit 6 on I/O port 21h
SeeAlso: INT 0D"IRQ5",INT 56"DESQview",INT 5E"DoubleDOS",INT 7E"GO32"
--------C-0E---------------------------------
INT 0E C - CPU-generated (80386+ native mode) - PAGE FAULT
Desc:   this interrupt is generated in protected and virtual-86 modes on
          attempting to access a 4K memory page whose page table entry has
          the "present" bit cleared
Notes:  used to implement virtual memory--when the page fault occurs, the
          operating system can load the appropriate page from disk
        a protected-mode program written in the Flat memory model will often
          generate this interrupt (typically reported as an Exception #14 or
          Exception 0E with a register dump) when dereferencing an
          uninitialized or corrupted pointer
SeeAlso: INT 0B"CPU"
--------h-0E---------------------------------
INT 0E C - HP 95LX - EXTERNAL CARD INTERRUPT
SeeAlso: INT 0D"HP 95LX",INT 0F"HP 95LX",INT 15/AX=4DD4h
--------H-0F---------------------------------
INT 0F C - IRQ7 - PARALLEL PRINTER
Desc:   this interrupt is generated by the LPT1 printer adapter when the
          printer becomes ready
Notes:  most printer adapters do not reliably generate this interrupt
        the 8259 interrupt controller generates an interrupt corresponding to
          IRQ7 when an error condition occurs
SeeAlso: INT 0D"IRQ5",INT 57"DESQview",INT 5F"DoubleDOS",INT 7F"GO32"
SeeAlso: MEM 0040h:006Bh
--------h-0F---------------------------------
INT 0F C - HP 95LX - REAL-TIME CLOCK
SeeAlso: INT 0E"HP 95LX",INT 15/AX=4DD4h,INT 70"IRQ8"
--------C-10---------------------------------
INT 10 C - CPU-generated (80286+) - COPROCESSOR ERROR
Desc:   this interrupt is generated by the CPU when the -ERROR pin is asserted
          by the coprocessor
Note:   AT's and clones usually wire the coprocessor to use IRQ13, but not all
          get it right
SeeAlso: INT 09"hardware",INT 75
--------V-1000-------------------------------
INT 10 - VIDEO - SET VIDEO MODE
        AH = 00h
        AL = desired video mode (see #00010)
Return: AL = video mode flag (Phoenix, AMI BIOS)
            20h mode > 7
            30h modes 0-5 and 7
            3Fh mode 6
        AL = CRT controller mode byte (Phoenix 386 BIOS v1.10)
Desc:   specify the display mode for the currently active display adapter
InstallCheck: for Ahead adapters, the signature "AHEAD" at C000h:0025h
        for Paradise adapters, the signature "VGA=" at C000h:007Dh
        for Oak Tech OTI-037/057/067/077 chipsets, the signature "OAK VGA" at
          C000h:0008h
        for ATI adapters, the signature "761295520" at C000h:0031h; the byte
          at C000h:0043h indicates the chipset revision:
                31h for 18800
                32h for 18800-1
                33h for 18800-2
                34h for 18800-4
                35h for 18800-5
                62h for 68800AX (Mach32) (see also #00732)
          the two bytes at C000h:0040h indicate the adapter type
                "22" EGA Wonder
                "31" VGA Wonder
                "32" EGA Wonder800+
          the byte at C000h:0042h contains feature flags
                bit 1: mouse port present
                bit 4: programmable video clock
          the byte at C000h:0044h contains additional feature flags if chipset
            byte > 30h (see #00009)
        for Genoa video adapters, the signature 77h XXh 99h 66h at C000h:NNNNh,
          where NNNNh is stored at C000h:0037h and XXh is
                00h for Genoa 6200/6300
                11h for Genoa 6400/6600
                22h for Genoa 6100
                33h for Genoa 5100/5200
                55h for Genoa 5300/5400
          for SuperEGA BIOS v2.41+, C000h:0057h contains the product level
          for Genoa SuperEGA BIOS v3.0+, C000h:0070h contains the signature
            "EXTMODE", indicating support for extended modes
Notes:  IBM standard modes do not clear the screen if the high bit of AL is set
          (EGA or higher only)
        the Tseng ET4000 chipset is used by the Orchid Prodesigner II, Diamond
          SpeedSTAR VGA, Groundhog Graphics Shadow VGA, Boca Super X VGA,
          Everex EV-673, etc.
SeeAlso: AX=0070h,AX=007Eh,AX=10E0h,AX=10F0h,AH=40h,AX=6F05h,AH=FFh"GO32"
SeeAlso: INT 33/AX=0028h,INT 5F/AH=00h,INT 62/AX=0001h,MEM 0040h:0049h
Index:  installation check;Tseng ET4000|installation check;Ahead video cards
Index:  installation check;Oak Technologies|installation check;ATI video cards
Index:  installation check;Paradise video|installation check;Genoa video cards

Bitfields for ATI additional feature flags:
Bit(s)  Description     (Table 00009)
 0      70 Hz non-interlaced display
 1      Korean (double-byte) characters
 2      45 MHz memory clock rather than 40 MHz
 3      zero wait states
 4      paged ROMs
 6      no 8514/A monitor support
 7      HiColor DAC

(Table 00010)
Values for video mode:
     text/ text pixel   pixel   colors disply scrn  system
     grph resol  box  resolution       pages  addr
 00h = T  40x25  8x8   320x200  16gray    8   B800 CGA,PCjr,Tandy
     = T  40x25  8x14  320x350  16gray    8   B800 EGA
     = T  40x25  8x16  320x400   16       8   B800 MCGA
     = T  40x25  9x16  360x400   16       8   B800 VGA
 01h = T  40x25  8x8   320x200   16       8   B800 CGA,PCjr,Tandy
     = T  40x25  8x14  320x350   16       8   B800 EGA
     = T  40x25  8x16  320x400   16       8   B800 MCGA
     = T  40x25  9x16  360x400   16       8   B800 VGA
 02h = T  80x25  8x8   640x200  16gray    4   B800 CGA,PCjr,Tandy
     = T  80x25  8x14  640x350  16gray    8   B800 EGA
     = T  80x25  8x16  640x400   16       8   B800 MCGA
     = T  80x25  9x16  720x400   16       8   B800 VGA
 03h = T  80x25  8x8   640x200   16       4   B800 CGA,PCjr,Tandy
     = T  80x25  8x14  640x350   16/64    8   B800 EGA
     = T  80x25  8x16  640x400   16       8   B800 MCGA
     = T  80x25  9x16  720x400   16       8   B800 VGA
     = T  80x43  8x8   640x350   16       4   B800 EGA,VGA [17]
     = T  80x50  8x8   640x400   16       4   B800 VGA [17]
 04h = G  40x25  8x8   320x200    4       .   B800 CGA,PCjr,EGA,MCGA,VGA
 05h = G  40x25  8x8   320x200   4gray    .   B800 CGA,PCjr,EGA
     = G  40x25  8x8   320x200    4       .   B800 MCGA,VGA
 06h = G  80x25  8x8   640x200    2       .   B800 CGA,PCjr,EGA,MCGA,VGA
     = G  80x25   .       .     mono      .   B000 HERCULES.COM on HGC [14]
 07h = T  80x25  9x14  720x350  mono     var  B000 MDA,Hercules,EGA
     = T  80x25  9x16  720x400  mono      .   B000 VGA
 08h = T 132x25  8x8  1056x200   16       .   B800 ATI EGA/VGA Wonder [2]
     = T 132x25  8x8  1056x200  mono      .   B000 ATI EGA/VGA Wonder [2]
     = G  20x25  8x8   160x200   16       .     .  PCjr, Tandy 1000
     = G  80x25  8x16  640x400  color     .     .  Tandy 2000
     = G  90x43  8x8   720x348  mono      .   B000 Hercules + MSHERC.COM
     = G  90x45  8x8   720x360  mono      .   B000 Hercules + HERKULES [11]
     = G  90x29  8x12  720x348  mono      .     .  Hercules + HERCBIOS [15]
 09h = G  40x25  8x8   320x200   16       .     .  PCjr, Tandy 1000
     = G  80x25  8x16  640x400  mono      .     .  Tandy 2000
     = G  90x43  8x8   720x348  mono      .     .  Hercules + HERCBIOS [15]
 0Ah = G  80x25  8x8   640x200    4       .     .  PCjr, Tandy 1000
 0Bh =   reserved                                  (EGA BIOS internal use)
     = G  80x25  8x8   640x200   16       .     .  Tandy 1000 SL/TL [13]
 0Ch =   reserved                                  (EGA BIOS internal use)
 0Dh = G  40x25  8x8   320x200   16       8   A000 EGA,VGA
 0Eh = G  80x25  8x8   640x200   16       4   A000 EGA,VGA
 0Fh = G  80x25  8x14  640x350  mono      2   A000 EGA,VGA
 10h = G  80x25  8x14  640x350    4       2   A000 64k EGA
     = G    .     .    640x350   16       .   A000 256k EGA,VGA
 11h = G  80x30  8x16  640x480  mono      .   A000 VGA,MCGA,ATI EGA,ATI VIP
 12h = G  80x30  8x16  640x480   16/256K  .   A000 VGA,ATI VIP
     = G  80x30  8x16  640x480   16/64    .   A000 ATI EGA Wonder
     = G    .     .    640x480   16       .     .  UltraVision+256K EGA
 13h = G  40x25  8x8   320x200  256/256K  .   A000 VGA,MCGA,ATI VIP
 14h = T 132x25  Nx16     .      16       .   B800 XGA, IBM Enhanced VGA [3]
     = T 132x25  8x16 1056x400   16/256K  .     .  Cirrus CL-GD5420/5422/5426
     = G  80x25  8x8   640x200    .       .     .  Lava Chrome II EGA
     = G    .     .    640x400   16       .     .  Tecmar VGA/AD
 15h = G  80x25  8x14  640x350    .       .     .  Lava Chrome II EGA
 16h = G  80x25  8x14  640x350    .       .     .  Lava Chrome II EGA
     = G    .     .    800x600   16       .     .  Tecmar VGA/AD
 17h = T 132x25   .       .       .       .     .  Tecmar VGA/AD
     = T  80x43  8x8   640x348   16       4   B800 Tseng ET4000 BIOS [10]
     = G  80x34  8x14  640x480    .       .     .  Lava Chrome II EGA
 18h = T  80x30  9x16  720x480   16       1   A000 Realtek RTVGA [12]
     = T 132x25   .       .     mono      .   B000 Cirrus 5320 chipset
     = T 132x44  8x8  1056x352  mono      .   B000 Tseng Labs EVA
     = T 132x44  9x8  1188x352   4gray    2   B000 Tseng ET3000 chipset
     = T 132x44  8x8  1056x352   16/256   2   B000 Tseng ET4000 chipset
     = G  80x34  8x14  640x480    .       .     .  Lava Chrome II EGA
     = G              1024x768   16       .     .  Tecmar VGA/AD
 19h = T  80x43  9x11  720x473   16       1   A000 Realtek RTVGA [12]
     = T 132x25  8x14 1056x350  mono      .   B000 Tseng Labs EVA
     = T 132x25  9x14 1188x350   4gray    4   B000 Tseng ET3000 chipset
     = T 132x25  8x14 1056x350   16/256   4   B000 Tseng ET4000 chipset
     = T 132x34   .       .     mono      .   B000 Cirrus 5320 chipset
 1Ah = T  80x60  9x8   720x480   16       1   A000 Realtek RTVGA [12]
     = T 132x28  8x13 1056x364  mono      .   B000 Tseng Labs EVA
     = T 132x28  9x13 1188x364   4gray    4   B000 Tseng ET3000 chipset
     = T 132x28  8x13 1056x364   16/256   4   B000 Tseng ET4000 chipset
     = T 132x44   .       .     mono      .   B000 Cirrus 5320 chipset
     = G    .     .    640x350  256       .     .  Tecmar VGA/AD
 1Bh = T 132x25  9x14 1188x350   16       1   A000 Realtek RTVGA [12]
     = G    .     .    640x400  256       .     .  Tecmar VGA/AD
 1Ch = T 132x25   .       .       .       .     .  Cirrus 5320 chipset
     = T 132x30  9x16 1188x480   16       1   A000 Realtek RTVGA [12]
     = G    .     .    640x480  256       .     .  Tecmar VGA/AD
 1Dh = T 132x43   .       .       .       .     .  Cirrus 5320 chipset
     = T 132x43  9x11 1188x473   16       1   A000 Realtek RTVGA [12]
     = G    .     .    800x600  256       .     .  Tecmar VGA/AD
 1Eh = T 132x44   .       .       .       .     .  Cirrus 5320 chipset
     = T 132x60  9x8  1188x480   16       1   A000 Realtek RTVGA [12]
 1Fh = G 100x75  8x8   800x600   16       1   A000 Realtek RTVGA
 20h = T 132x25   .       .      16       .     .  Avance Logic AL2101
     = G  40x16   .    240x128  mono      .   B000 HP 95LX/100LX/200LX
     = G  80x30  8x16  640x480   16       .     .  C&T 64310/65530 BIOS
     = G 120x45  8x16  960x720   16       1   A000 Realtek RTVGA
 21h = T  80x25   .       .     mono      .   B000 HP 200LX
     = T 132x30   .       .      16       .     .  Avance Logic AL2101
     = T 132x44  9x9  1188x396   16/256K  .   B800 WD90C
     = T 132x44  9x9  1188x396   16       .   B800 Diamond Speedstar 24X
     = T 132x60   .       .      16       2   B800 Tseng ET4000 chipset [10]
     = G  80x43  8x8   720x348  mono      .   B000 DESQview 2.x+Hercules [4]
     = G 128x48  8x16 1024x768   16       1   A000 Realtek RTVGA [12]
 22h = T 132x43   .       .       .       .     .  Allstar Peacock (VGA)
     = T 132x43   .       .      16       .     .  Avance Logic AL2101
     = T 132x44  8x8  1056x352    .       .   B800 Tseng Labs EVA
     = T 132x44  9x8  1188x352   16/256K  2   B800 Tseng ET3000 chipset
     = T 132x44  8x8  1056x352   16/256K  2   B800 Tseng ET4000 chipset
     = T 132x44  8x8  1056x352    .       .     .  Ahead Systems EGA2001
     = T 132x44  8x8  1056x352   16       2   B800 Ahead B
     = T 132x44  8x9  1056x398   16       .     .  STB Lightspeed ET4000/W32P
     = T 132x44   .       .      16       .     .  Orchid Prodesigner VGA
     = G  80x43  8x8   720x348  mono      .   B800 DESQview 2.x+Hercules [4]
     = G  96x64  8x16  768x1024  16       1   A000 Realtek RTVGA
     = G 100x37  8x16  800x600   16       .     .  C&T 64310/65530 BIOS
 23h = T 132x25  6x14  792x350    .       .   B800 Tseng Labs EVA
     = T 132x25  9x14 1188x350   16/256K  4   B800 Tseng ET3000 chipset
     = T 132x25  8x14 1056x350   16/256   4   B800 Tseng ET4000 chipset
     = T 132x25  8x14 1056x350    .       .     .  Ahead Systems EGA2001
     = T 132x25  8x14 1056x350   16       4   B800 Ahead B
     = T 132x25  8x8  1056x200   16       .   B800 ATI EGA Wonder,ATI VIP
     = T 132x25   .       .       .       .     .  Cirrus 5320 chipset
     = T 132x28   .       .       .       .     .  Allstar Peacock (VGA)
     = T 132x28   .       .      16       .     .  Orchid Prodesigner VGA
     = T 132x60   .       .      16       .     .  Avance Logic AL2101
     = G 128x48  8x16 1024x768    4       1   A000 Realtek RTVGA
 24h = T  80x30   .       .      16       .     .  Avance Logic AL2101
     = T 132x25   .       .       .       .     .  Allstar Peacock (VGA)
     = T 132x25   .       .      16       .     .  Orchid Prodesigner VGA
     = T 132x28  6x13  792x364    .       .   B800 Tseng Labs EVA
     = T 132x28  9x13 1188x364   16/256K  4   B800 Tseng ET3000 chipset
     = T 132x28  8x12 1056x336   16       1   B800 Ahead B
     = T 132x28  8x13 1056x364   16/256K  4   B800 Tseng ET4000 chipset
     = T 132x28  8x14 1056x392   16       .     .  STB Lightspeed ET4000/W32P
     = T 132x28   .       .       .       .     .  Cirrus 5320 chipset
     = G  64x32  8x16  512x512  256       1   A000 Realtek RTVGA
     = G 128x48  8x16 1024x768   16       .     .  C&T 64310/65530 BIOS
 25h = T  80x43   .       .      16       .     .  Avance Logic AL2101
     = G  80x60  8x8   640x480    .       .   A000 Tseng Labs EVA
     = G  80x60  8x8   640x480   16/256K  1   A000 Tseng ET3000/4000 chipset
     = G    .     .    640x480   16       .     .  VEGA VGA
     = G  80x60  8x8   640x480   16       .   A000 Orchid Prodesigner VGA
     = G  80x60  8x8   640x480   16       1   A000 Ahead B (same as 26h)
     = G    .     .    640x480   16       .     .  NEC GB-1
     = G    .     .    640x480   16       .     .  Cirrus 5320 chipset
     = G    .     .    640x400  256       .     .  Realtek RTVGA
 26h = T  80x60  8x8   640x480    .       .     .  Tseng Labs EVA
     = T  80x60  8x8   640x480   16/256K  3   B800 Tseng ET3000/4000 chipset
     = T  80x60   .       .       .       .     .  Allstar Peacock (VGA)
     = T  80x60   .       .      16       .     .  Orchid ProDesigner VGA
     = T  80x60   .       .      16       .     .  Avance Logic AL2101
     = G  80x60  8x8   640x480    .       .     .  Ahead Systems EGA2001
     = G  80x60  8x8   640x480   16       1   A000 Ahead B (same as 25h)
     = G    .     .    640x480  256       .     .  Realtek RTVGA
 27h = T 132x25  8x8  1056x200  mono      .   B000 ATI EGA Wonder,ATI VIP
     = G    .     .    720x512   16       .     .  VEGA VGA
     = G    .     .    720x512   16       .     .  Genoa
     = G 100x75  8x8   800x600  256       1   A000 Realtek RTVGA [12]
     = G    .     .    960x720   16       .     .  Avance Logic AL2101
 28h = T ???x???  .       .       .       .     .  VEGA VGA
     = G    .     .    512x512  256       .     .  Avance Logic AL2101
     = G    .     .   1024x768  256       .     .  Realtek RTVGA (1meg)
     = G 160x64  8x16 1280x1024  16       .     .  Chips&Technologies 64310 [1]
 29h = G    .     .    640x400  256       .     .  Avance Logic AL2101
     = G    .     .    800x600   16       .     .  VEGA VGA
     = G 100x37  8x16  800x600   16       .   A000 Orchid
     = G    .     .    800x600   16       .   A000 STB,Genoa,Sigma
     = G    .     .    800x600   16       .     .  Allstar Peacock (VGA)
     = G 100x37  8x16  800x600   16/256K  1   A000 Tseng ET3000/4000 chipset
     = G    .     .    800x600  ???       .     .  EIZO MDB10
     = G    .     .    800x600   16       .     .  Cirrus 5320 chipset
     = G   NA     .    800x600   16       .     .  Compaq QVision 1024/1280
     = G    .     .   1024x1024 256       .     .  Realtek RTVGA BIOS v3.C10
 2Ah = T 100x40   .       .       .       .     .  Allstar Peacock (VGA)
     = T 100x40  8x16  800x640   16       .     .  Orchid Prodesigner VGA
     = T 100x40  8x15  800x600   16/256K  4   B800 Tseng ET3000/4000 chipset
     = T 100x40  8x15  800x600   16       .     .  STB Lightspeed ET4000/W32P
     = G    .     .    640x480  256       .     .  Avance Logic AL2101
     = G    .     .   1280x1024  16       .     .  Realtek RTVGA
 2Bh = G    .     .    800x600   16       .     .  Avance Logic AL2101
 2Ch = G    .     .    800x600  256       .     .  Avance Logic AL2101
 2Dh = G    .     .    640x350  256       .     .  VEGA VGA
     = G    .     .    640x350  256/256K  .   A000 Orchid, Genoa, STB
     = G  80x25  8x14  640x350  256/256K  1   A000 Tseng ET3000/4000 chipset
     = G    .     .    640x350  256       .     .  Cirrus 5320 chipset
     = G  80x25  8x14  640x350  256       .     .  STB Lightspeed ET4000/W32P
     = G    .     .    768x1024  16       .     .  Avance Logic AL2101
 2Eh = G    .     .    640x480  256       .     .  VEGA VGA
     = G  80x30  8x16  640x480 256/256K   .   A000 Orchid
     = G    .     .    640x480 256/256K   .   A000 STB,Genoa,Sigma
     = G  80x30  8x16  640x480 256/256K   1   A000 Tseng ET3000/4000 chipset
     = G    .     .    640x480 256/256K   .     .  Compaq QVision 1024/1280
     = G    .     .    768x1024 256       .     .  Avance Logic AL2101
 2Fh = T 160x50  8x8  1280x400   16       4   B800 Ahead B (Wizard/3270)
     = G    .     .    720x512  256       .     .  VEGA VGA
     = G    .     .    720x512  256       .     .  Genoa
     = G  80x25  8x16  640x400 256/256K   1   A000 Tseng ET4000 chipset
     = G    .     .   1024x768    4       .     .  Avance Logic AL2101
 30h = G  80x30  8x16  640x480  256       .     .  C&T 64310/65530 BIOS
     = G    .     .       .       .       .   B800 AT&T 6300
     = G    .     .    720x350    2       .     .  3270 PC
     = G    .     .    800x600  256       .     .  VEGA VGA
     = G 100x37  8x16  800x600 256/256K   .   A000 Orchid
     = G    .     .    800x600 256/256K   .   A000 STB,Genoa,Sigma
     = G    .     .    800x600  256       .     .  Cardinal
     = G 100x37  8x16  800x600 256/256K   1   A000 Tseng ET3000/4000 chipset
     = G    .     .   1024x768   16       .     .  Avance Logic AL2101
 31h = G    .     .   1024x768  256       .     .  Avance Logic AL2101
 32h = T  80x34  8x10     .      16       4   B800 Ahead B (Wizard/3270)
     = G    .     .    640x480  256       .     .  Compaq QVision 1024/1280
     = G 100x37  8x16  800x600  256       .     .  C&T 64310/65530 BIOS
 33h = T 132x44  8x8      .      16       .   B800 ATI EGA Wonder,ATI VIP
     = T  80x34  8x8      .      16       4   B800 Ahead B (Wizard/3270)
 34h = T  80x66  8x8      .      16       4   B800 Ahead B (Wizard/3270)
     = G    .     .    800x600  256       .     .  Compaq QVision 1024/1280
     = G 128x48  8x16 1024x768  256       .     .  Chips&Technologies 64310
 36h = G    .     .    960x720   16       .     .  VEGA VGA, STB
     = G    .     .    960x720   16       .   A000 Tseng ET3000 only
     = G    .     .   1280x1024  16       .     .  Avance Logic AL2101
 37h = T 132x44  8x8      .     mono      .   B800 ATI EGA Wonder,ATI VIP
     = G    .     .   1024x768   16       .     .  VEGA VGA
     = G 128x48  8x16 1024x768   16       .   A000 Orchid
     = G    .     .   1024x768   16       .   A000 STB,Genoa,Sigma
     = G    .     .   1024x768   16       .     .  Definicon
     = G 128x48  8x16 1024x768   16       1   A000 Tseng ET3000/4000 chipset
     = G    .     .   1024x768   16       .     .  Compaq QVision 1024/1280
     = G    .     .   1280x1024 256       .     .  Avance Logic AL2101
 38h = G    .     .   1024x768  256       .     .  STB VGA/EM-16 Plus (1MB)
     = G 128x48  8x16 1024x768  256/256K  1   A000 Tseng ET4000 chipset
     = G    .     .   1024x768  256       .     .  Orchid ProDesigner II
     = G    .     .   1024x768  256       .     .  Compaq QVision 1024/1280
     = G 160x64  8x16 1280x1024 256       .     .  Chips&Technologies 64310 [1]
 39h = G    .     .   1280x1024  16       .     .  Compaq QVision 1280
 3Ah = G    .     .   1280x1024 256       .     .  Compaq QVision 1280
 3Bh = G    .     .    512x480  256       .     .  Compaq QVision 1024/1280
 3Ch = G    .     .    640x400   64K      .     .  Compaq QVision 1024/1280
 3Dh = G    .     .   1280x1024  16       .     .  Definicon
     = G 128x64  8x16 1280x1024  16       1   A000 Tseng ET4000 v3.00 [1,7]
 3Eh = G    .     .   1280x961   16       .     .  Definicon
     = G    .     .    640x480   64K      .     .  Compaq QVision 1024/1280
 3Fh = G    .     .   1280x1024 256       .     .  Hercules ??? (ET4000W32)
     = G    .     .    800x600   64K      .     .  Compaq QVision 1024/1280
 40h = T  80x43   .       .       .       .     .  VEGA VGA, Tecmar VGA/AD
     = T  80x43   .       .       .       .     .  Video7 V-RAM VGA
     = T  80x43   .       .       .       .     .  Tatung VGA
     = T 100x30   .       .      16       .     .  MORSE VGA
     = T 100x30   .       .       .       .     .  Cirrus 510/520 chipset
     = T  80x25   .    720x350  mono      .     .  Genoa SuperEGA BIOS 3.0+
     = G    .     .    320x200   64K      .     .  Avance Logic AL2101
     = G  80x25  8x16  640x400    2       1   B800 AT&T 6300, AT&T VDC600
     = G  80x25  8x16  640x400    2       1   B800 Olivetti Quaderno
     = G  80x25  8x16  640x400    2       1   B800 Compaq Portable
     = G  80x30  8x16  640x480  32K       .     .  Chips&Technologies 64310
     = G    .     .   1024x768   64K      .     .  Compaq QVision 1280
 41h = T 132x25   .       .       .       .     .  VEGA VGA
     = T 132x25   .       .       .       .     .  Tatung VGA
     = T 132x25   .       .       .       .     .  Video7 V-RAM VGA
     = T 100x50   .       .      16       .     .  MORSE VGA
     = T 100x50   .       .       .       .     .  Cirrus 510/520 chipset
     = T  80x34  9x14  720x476   16/256K  .   B800 WD90C
     = T  80x34  9x14     .      16       .   B800 Diamond Speedstar 24X
     = G    .     .    512x512   64K      .     .  Avance Logic AL2101
     = G    .     .    640x200   16       1     .  AT&T 6300
     = G  80x30  8x16  640x480   64K      .     .  Chips&Technologies 64310
     = G  80x25   .    720x348  mono      .   B000 Genoa SuperEGA BIOS 3.0+
 42h = T 132x43   .       .       .       .     .  VEGA VGA
     = T 132x43   .       .       .       .     .  Tatung VGA
     = T 132x43   .       .       .       .     .  Video7 V-RAM VGA
     = T  80x34  9x10     .       4       4   B800 Ahead B (Wizard/3270)
     = T 100x60   .       .      16       .     .  MORSE VGA
     = T 100x60   .       .       .       .     .  Cirrus 510/520 chipset
     = G  80x25  8x16  640x400   16       .     .  AT&T 6300, AT&T VDC600
     = G    .     .    640x400   64K      .     .  Avance Logic AL2101
     = G  80x25   .    720x348  mono      .   B800 Genoa SuperEGA BIOS 3.0+
     = G 100x37  8x16  800x600   32K      .     .  Chips&Technologies 64310
 43h = T  80x60   .       .       .       .     .  VEGA VGA
     = T  80x60   .       .       .       .     .  Tatung VGA
     = T  80x60   .       .       .       .     .  Video7 V-RAM VGA
     = T  80x45  9x8      .       4       4   B800 Ahead B (Wizard/3270)
     = T 100x75   .       .      16       .     .  MORSE VGA
     = T  80x29   .    720x348  mono      .     .  Genoa SuperEGA BIOS 3.0+
     = G    .     . 640x200 of 640x400 viewport    AT&T 6300 (unsupported)
     = G    .     .    640x480   64K      .     .  Avance Logic AL2101
     = G 100x37  8x16  800x600   64K      .     .  Chips&Technologies 64310
 44h =  disable VDC and DEB output              .  AT&T 6300
     = T 100x60   .       .       .       .     .  VEGA VGA
     = T 100x60   .       .       .       .     .  Tatung VGA
     = T 100x60   .       .       .       .     .  Video7 V-RAM VGA
     = T  80x32   .    720x352  mono      .     .  Genoa SuperEGA BIOS 3.0+
     = G    .     .    800x600   64K      .     .  Avance Logic AL2101
 45h = T 132x28   .       .       .       .     .  Tatung VGA
     = T 132x28   .       .       .       .     .  Video7 V-RAM VGA
     = T  80x44   .    720x352  mono      .     .  Genoa SuperEGA BIOS 3.0+
 46h = T 132x25  8x14     .     mono      .     .  Genoa 6400
     = T 132x25  9x14     .     mono      .     .  Genoa SuperEGA BIOS 3.0+
     = G 100x40  8x15  800x600    2       .     .  AT&T VDC600
 47h = T 132x29  8x12     .     mono      .     .  Genoa 6400
     = T 132x29  9x12     .     mono      .     .  Genoa SuperEGA BIOS 3.0+
     = T 132x28  9x16 1188x448   16/256K  .   B800 WD90C
     = T 132x28  9x16     .      16       .   B800 Diamond Speedstar 24X
     = G 100x37  8x16  800x600   16       .     .  AT&T VDC600
 48h = T 132x32  8x12     .     mono      .     .  Genoa 6400
     = T 132x32  9x11     .     mono      .     .  Genoa SuperEGA BIOS 3.0+
     = G  80x50  8x8   640x400    2       .   B800 AT&T 6300, AT&T VDC600
     = G  80x50  8x8   640x400    2       .   B800 Olivetti Quaderno
 49h = T 132x44  8x8      .     mono      .     .  Genoa 6400
     = T 132x44  9x8      .     mono      .     .  Genoa SuperEGA BIOS 3.0+
     = G  80x30  8x16  640x480    .       .     .  Lava Chrome II EGA
     = G  80x30  8x16  640x480    .       .   A000 Diamond Stealth64 Video 2xx1
 4Bh = G 100x37  8x16  800x600    .       .   A000 Diamond Stealth64 Video 2xx1
 4Dh = T 120x25   .       .       .       .     .  VEGA VGA
     = G    .     .    512x480   16M      .     .  Compaq QVision 1024/1280
     = G 128x48  8x16 1024x768    .       .   A000 Diamond Stealth64 Video 2xx1
 4Eh = T 120x43   .       .       .       .     .  VEGA VGA
     = T  80x60  8x8      .      16/256K  .   B800 Oak OTI-067/OTI-077 [8]
     = G    .     .    640x400   16M      .     .  Compaq QVision 1024/1280
     = G 144x54  8x16 1152x864    .       .   A000 Diamond Stealth64 Video 2xx1
 4Fh = T 132x25   .       .       .       .     .  VEGA VGA
     = T 132x60   .       .       .       .     .  some Oak Tech VGA [8]
     = G    .     .    640x480   16M      .     .  Compaq QVision 1280
 50h = T  80x30  8x16     .      16/256K  .   B800 Trident TVGA 8800/8900
     = T  80x34   .       .       .       .     .  Lava Chrome II EGA
     = T  80x43   .       .     mono      .     .  VEGA VGA
     = T 132x25  9x14     .     mono      .     .  Ahead Systems EGA2001
     = T 132x25  9x14     .       4       4   B800 Ahead B
     = T 132x25  8x14     .      16       8   B800 OAK Technologies VGA-16
     = T 132x25  8x14     .      16/256K  .   B800 Oak OTI-037/067/077 [8]
     = T 132x25  8x14 1056x350   16       8   B800 UM587 chipset
     = T 132x30   .       .      16       .     .  MORSE VGA
     = T 132x30   .       .       .       .     .  Cirrus 510/520 chipset
     = G  80x30  8x16  640x480   16       .     .  Paradise EGA-480
     = G  80x30  8x16  640x480   16       .     .  NEL Electronics BIOS
     = G  80x30  8x16  640x480   16M      .     .  Chips&Technologies 64310
     = G    .     .    640x480  mono???   .     .  Taxan 565 EGA
     = G  40x25  8x8   320x200    .       .     .  Genoa SuperEGA BIOS 3.0+
 51h = T  80x30  8x16     .       .       .     .  Paradise EGA-480
     = T  80x30  9x16     .       .       .     .  NEL Electronics BIOS
     = T  80x30   .       .       .       .     .  Lava Chrome II EGA
     = T  80x43  8x11     .      16/256K  .   B800 Trident TVGA 8800/8900
     = T 132x25   .       .     mono      .     .  VEGA VGA
     = T 132x28  9x12     .       4       4   B800 Ahead B
     = T 132x43  8x8      .      16       5   B800 OAK Technologies VGA-16
     = T 132x43  8x8      .      16/256K  .   B800 Oak OTI-037/067/077
     = T 132x43  8x8  1056x344   16       5   B800 UM587 chipset
     = T 132x50   .       .      16       .     .  MORSE VGA
     = T 132x50   .       .       .       .     .  Cirrus 510/520 chipset
     = G  80x34  8x14  640x480   16       .     .  ATI EGA Wonder
     = G  80x25  8x8   640x200    .       .     .  Genoa SuperEGA BIOS 3.0+
 52h = T  80x60   .       .       .       .     .  Lava Chrome II EGA
     = T  80x60  8x8      .      16/256K  .   B800 Trident TVGA 8800/8900
     = T 132x43   .       .     mono      .     .  VEGA VGA
     = T 132x44  9x8      .     mono      .     .  Ahead Systems EGA2001
     = T 132x44  9x8      .       4       2   B800 Ahead B
     = T 132x60   .       .      16       .     .  MORSE VGA
     = T 132x60   .       .       .       .     .  Cirrus 510/520 chipset
     = G  80x25  8x19  640x480   16       1   A000 AX VGA (Kanji&superimpose)
     = G  94x29  8x14  752x410   16       .     .  ATI EGA Wonder
     = G 100x75  8x8   800x600   16       1   A000 OAK Technologies VGA-16
     = G 100x75  8x8   800x600   16       .   A000 Oak OTI-037 chipset [8]
     = G 100x37  8x16  800x600   16       .   A000 Oak OTI-067/077 chips [8]
     = G 100x75  8x8   800x600   16       .   A000 UM587 chipset
     = G 128x30  8x16 1024x480   16       .     .  NEL Electronics BIOS
 53h = T  80x25  8x16     .       .       .     .  NEL Electronics BIOS
     = T  80x60   .       .      16       .     .  MORSE VGA
     = T  80x60   .       .       .       .     .  Cirrus 510/520 chipset
     = T 132x25  8x14     .      16/256K  .   B800 Trident TVGA 8800/8900
     = T 132x43   .       .       .       .     .  Lava Chrome II EGA
     = G  80x25  8x19  640x480   16       1   A000 AX VGA (Kanji, no superimp.)
     = G    .     .    640x480  256       .     .  Oak VGA
     = G  80x30  8x16  640x480  256       .   A000 Oak OTI-067/OTI-077 [8]
     = G 100x40  8x14  800x560   16       .     .  ATI EGA Wonder,ATI VIP
     = G    .     .       .       .       .     .  AX PC
 54h = T 132x25   .       .       .       .     .  Lava Chrome II EGA
     = T 132x30  8x16     .      16/256K  .   B800 Trident TVGA 8800/8900
     = T 132x43  8x8      .       .       .     .  Paradise EGA-480
     = T 132x43  8x8      .       .       .     .  NEL Electronics BIOS
     = T 132x43  7x9      .      16/256K  .   B800 Paradise VGA
     = T 132x43  8x9      .      16/256K  .   B800 Paradise VGA on multisync
     = T 132x43   .       .       .       .     .  Taxan 565 EGA
     = T 132x43   .       .       .       .     .  AST VGA Plus
     = T 132x43   .       .       .       .     .  Hewlett-Packard D1180A
     = T 132x43  7x9      .      16       .     .  AT&T VDC600
     = T 132x43  9x9  1188x387   16/256K  .   B800 WD90C
     = T 132x43  9x9  1188x387   16/256K  .   B800 Diamond Speedstar 24X
     = T 132x43  9x9  1188x387   16/256K  .   B800 Diamond Stealth 24
     = T 132x43  8x8      .       .       .   B800 Diamond Stealth64 Video 2xx1
     = T 132x43  8x8  1056x350   16/256K  .     .  Cirrus CL-GD5420/5422/5426
     = T 132x50  8x8      .      16       .   A000 NCR 77C22 [9]
     = G 100x42  8x14  800x600   16       .   A000 ATI EGA Wonder, VGA Wonder
     = G 100x42  8x14  800x600   16       .   A000 ATI Ultra 8514A, ATI XL
     = G    .     .    800x600  256       .   A000 Oak VGA
     = G 100x37  8x16  800x600  256       .   A000 Oak OTI-067/077 chips [8]
 55h = T  80x66  8x8      .      16/256K  .   A000 ATI VIP
     = T 132x25  8x14     .       .       .     .  Paradise EGA-480
     = T 132x25  8x14     .       .       .     .  NEL Electronics BIOS
     = T 132x25  7x16     .      16/256K  .   B800 Paradise VGA
     = T 132x25  8x16     .      16/256K  .   B800 Paradise VGA on multisync
     = T 132x25   .       .       .       .     .  Taxan 565 EGA
     = T 132x25   .       .       .       .     .  AST VGA Plus
     = T 132x25   .       .       .       .     .  Hewlett-Packard D1180A
     = T 132x25  7x16     .      16       .     .  AT&T VDC600
     = T 132x25  8x16     .      16       .   A000 NCR 77C22 [9]
     = T 132x25  9x16 1188x400   16/256K  .   B800 WD90C
     = T 132x25  9x16 1188x400   16/256K  .   B800 Diamond Speedstar 24X
     = T 132x25  9x16 1188x400   16/256K  .   B800 Diamond Stealth 24
     = T 132x25  8x16     .       .       .   B800 Diamond Stealth64 Video 2xx1
     = T 132x25  8x14 1056x350   16/256K  .     .  Cirrus CL-GD5420/5422/5426
     = T 132x43  8x11     .      16/256K  .   B800 Trident TVGA 8800/8900
     = G  94x29  8x14  752x410    .       .     .  Lava Chrome II EGA
     = G 128x48  8x16 1024x768   16/256K  .   A000 ATI VGA Wonder v4+  [5]
     = G    .     .   1024x768   16/256K  .     .  ATI VGA Wonder Plus
     = G    .     .   1024x768   16/256K  .     .  ATI Ultra 8514A,ATI XL
     = G 128x48  8x16 1024x768    4       .   A000 Oak OTI-067/077 chips [8]
 56h = T 132x43  8x8      .       3???    2   B000 NSI Smart EGA+
     = T 132x43  7x9      .       4       .   B000 Paradise VGA
     = T 132x43  8x9      .       4       .   B000 Paradise VGA on multisync
     = T 132x43   .       .     mono      .     .  Taxan 565 EGA
     = T 132x43  7x9      .       2       .     .  AT&T VDC600
     = T 132x43  9x8      .       .       .     .  NEL Electronics BIOS
     = T 132x50  8x8      .       4       .   A000 NCR 77C22 [9]
     = T 132x60  8x8      .      16/256K  .   B800 Trident TVGA 8800/8900
     = G    .     .   1024x768   16       .   A000 Oak VGA
     = G 128x48  8x16 1024x768   16       .   A000 Oak OTI-067/077 chips [8]
 57h = T 132x25  8x14     .       3???    4   B000 NSI Smart EGA+
     = T 132x25  7x16     .       4       .   B000 Paradise VGA
     = T 132x25  8x16     .       4       .   B000 Paradise VGA on multisync
     = T 132x25  9x14     .       .       .     .  NEL Electronics BIOS
     = T 132x25   .       .     mono      .     .  Taxan 565 EGA
     = T 132x25  7x16     .       2       .     .  AT&T VDC600
     = T 132x25  9x14     .      16/256K  .   B800 Trident TVGA 8800/8900
     = T 132x25  8x16     .       4       .   A000 NCR 77C22 [9]
     = G  96x48  8x16  768x1024  16       .   A000 Oak OTI-067/077 chips [8]
 58h = T  80x33  8x14     .      16       .   B800 ATI EGA Wonder,ATI VIP
     = T  80x32  9x16     .      16       .     .  Genoa 6400
     = T  80x43  8x8      .       .       .     .  NEL Electronics BIOS
     = T 132x30  9x16     .      16/256K  .   B800 Trident TVGA 8800/8900
     = G 100x75  8x8   800x600   16/256K  .   A000 Paradise VGA
     = G 100x75  8x8   800x600   16       .     .  AT&T VDC600
     = G 100x75  8x8   800x600   16       .   A000 NCR 77C22 [9]
     = G 100x75  8x8   800x600   16       .   A000 Diamond Speedstar 24X
     = G 100x75  8x8   800x600   16/256K  .   A000 Paradise VGA, WD90C
     = G    .     .    800x600   16       .     .  AST VGA Plus, Compaq VGA
     = G    .     .    800x600   16       .     .  Dell VGA
     = G    .     .    800x600   16       .     .  Hewlett-Packard D1180A
     = G    .     .    800x600  ???       .     .  ELT VGA PLUS 16
     = G 100x37  8x16  800x600   16/256K  .   A000 Cirrus CL-GD5420/5422/5426
     = G 160x64  8x16 1280x1024  16       .   A000 Oak OTI-077 chipset [8]
 59h = T  80x43  9x8      .       .       .     .  NEL Electronics BIOS
     = T  80x66  8x8      .      16/256K  .   A000 ATI VIP
     = T 132x43  9x11     .      16/256K  .   B800 Trident TVGA 8800/8900
     = G 100x75  8x8   800x600    2       .   A000 Paradise VGA
     = G 100x75  8x8   800x600    2       .     .  AT&T VDC600
     = G    .     .    800x600    2       .     .  AST VGA Plus, Compaq VGA
     = G    .     .    800x600    2       .     .  Dell VGA
     = G    .     .    800x600    2       .     .  Hewlett-Packard D1180A
     = G 100x75  8x8   800x600    2       .   A000 NCR 77C22 [9]
     = G 128x48  8x16 1024x768  256       .   A000 Oak OTI-077 chipset [8]
 5Ah = T  80x60  8x8      .       .       .     .  NEL Electronics BIOS
     = T 132x60  9x8      .      16/256K  .   B800 Trident TVGA 8800/8900
     = G 128x48  8x16 1024x768    2       .   A000 NCR 77C22 [9]
 5Bh = T  80x30  8x16     .       .       .   B800 ATI VGA Wonder (undoc)
     = G    .     .    640x350  256       .     .  Genoa 6400
     = G  80x25  8x16  640x400   32K      .   A000 Oak OTI-067/077 chips [8]
     = G    .     .    800x600   16       .     .  Maxxon, SEFCO TVGA, Imtec
     = G 100x75  8x8   800x600   16/256K  .   A000 Trident TVGA 8800, 8900
     = G    .     .    800x600  ???       .     .  Vobis MVGA
     = G 100x37  8x16  800x600    .       .     .  NEL Electronics BIOS
     = G 128x48  8x16 1024x768   16       .   A000 NCR 77C22 [1,9]
 5Ch = T 100x37  8x16     .       .       .     .  NEL Electronics BIOS
     = G    .     .    640x400  256       .     .  Logix, ATI Prism Elite
     = G    .     .    640x400  256       .     .  Maxxon, SEFCO TVGA, Imtec
     = G  80x25  8x16  640x400  256/256K  .   A000 Zymos Poach, Hi Res 512
     = G  80x25  8x16  640x400  256/256K  .   A000 Trident TVGA 8800/8900
     = G  80x30  8x16  640x480  256       .     .  Genoa 6400
     = G  80x30  8x16  640x480   32K      .   A000 Oak OTI-077 chipset [8]
     = G 100x75  8x8   800x600  256       .   A000 NCR 77C22 [9]
     = G 100x75  8x8   800x600  256/256K  .   A000 WD90C
     = G 100x75  8x8   800x600  256/256K  .   A000 Diamond Speedstar 24X
     = G 100x37  8x16  800x600  256/256K  .   A000 Cirrus CL-GD5420/5422/5426
 5Dh = T 100x75  8x8      .       .       .     .  NEL Electronics BIOS
     = G  80x25  8x14  640x350   64K      .     .  STB Lightspeed ET4000/W32P
     = G    .     .    640x480  256       .     .  Logix, ATI Prism Elite
     = G    .     .    640x480  256       .     .  Maxxon, SEFCO TVGA, Imtec
     = G  80x30  8x16  640x480  256/256K  .   A000 Zymos Poach, Hi Res 512
     = G  80x30  8x16  640x480  256/256K  .   A000 Trident TVGA 8800 (512K)
     = G 128x48  8x16 1024x768   16       .   A000 NCR 77C22 [9]
     = G 128x48  8x16 1024x768   16/256K  .   A000 WD90C
     = G 128x48  8x16 1024x768   16       .   A000 Diamond Speedstar 24X
     = G 128x48  8x16 1024x768   16/256K  .   A000 Cirrus CL-GD5420/5422/5426
 5Eh = G    .     .    640x400  256       .     .  Paradise VGA,VEGA VGA
     = G    .     .    640x400  256       .     .  AST VGA Plus, NCR 77C22
     = G    .     .    640x400  256       .     .  Compaq VGA, Dell VGA
     = G  80x25  8x16  640x400  256       .     .  AT&T VDC600
     = G  80x25  8x16  640x400  256       .   A000 NCR 77C22 [9]
     = G  80x25  8x16  640x400  256/256K  .   A000 WD90C
     = G  80x25  8x16  640x400  256/256K  .   A000 Diamond Speedstar 24X
     = G    .     .    800x600   16       .     .  Logix, ATI Prism Elite
     = G 100x37  8x16  800x600   16       .     .  NEL Electronics BIOS
     = G 100x75  8x8   800x600  256       .     .  Genoa 6400
     = G 100x75  8x8   800x600  256/256K  .   A000 Zymos Poach, Trident 8900
     = G 100x75  8x8   800x600  256/256K  .   A000 Hi Res 512
 5Fh = G  80x25  8x16  640x400   64K      .     .  STB Lightspeed ET4000/W32P
     = G    .     .    640x480  256       .     .  Paradise VGA
     = G    .     .    640x480  256       .     .  AST VGA Plus, NCR 77C22
     = G    .     .    640x480  256       .     .  Compaq VGA, Dell VGA
     = G    .     .    640x480  256       .     .  Hewlett-Packard D1180A
     = G  80x30  8x16  640x480  256       .     .  AT&T VDC600 (512K)
     = G  80x30  8x16  640x480  256       .   A000 NCR 77C22 [9]
     = G  80x30  8x16  640x480  256/256K  .   A000 WD90C
     = G  80x30  8x16  640x480  256/256K  .   A000 Diamond Speedstar 24X
     = G  80x30  8x16  640x480  256/256K  .   A000 Cirrus CL-GD5420/5422/5426
     = G    .     .   1024x768   16       .     .  Logix, ATI Prism Elite
     = G    .     .   1024x768   16       .     .  Maxxon, Imtec
     = G 128x48  8x16 1024x768   16       .     .  Genoa 6400
     = G 128x48  8x16 1024x768   16/256K  .   A000 Zymos Poach, Hi Res 512
     = G 128x48  8x16 1024x768   16/256K  .   A000 Trident TVGA 88/8900 512K
 60h = T 132x25  8x14     .      16/64    8   B800 Quadram Ultra VGA
     = T 132x25  8x14     .      16       .     .  Genoa 6400
     = T 132x25  8x14     .      16       .     .  Genoa SuperEGA BIOS 3.0+
     = T 132x25   .       .       .       .     .  Cirrus 5320 chipset
     = T 132x25  8x16 1056x400   16       .   B800 Chips&Technologies chipset
     = G  80x???  .    ???x400    .       .     .  Corona/Cordata BIOS 4.10+
     = G  80x25  8x16  640x400  256       1   A000 Ahead A, Ahead B
     = G    .     .    752x410    .       .     .  VEGA VGA
     = G    .     .    752x410   16       .     .  Tatung VGA
     = G    .     .    752x410   16       .     .  Video7 V-RAM VGA
     = G 128x48  8x16 1024x768    4/256K  .   A000 Trident TVGA 8900
     = G 128x48  8x16 1024x768  256/256K  .   A000 WD90C
     = G 128x48  8x16 1024x768  256/256K  .   A000 Diamond Speedstar 24X
     = G 128x48  8x16 1024x768  256/256K  .   A000 Cirrus CL-GD5420/5422/5426
     = G 144x54  8x16 1152x864    .       .   A000 Diamond Stealth64 Video 2xx1
 61h = T 132x29  8x12     .      16/64    8   B800 Quadram Ultra VGA
     = T 132x29  8x8      .      16       .     .  Genoa 6400
     = T 132x29  8x8      .      16       .     .  Genoa SuperEGA BIOS 3.0+
     = T 132x50   .       .       .       .     .  Cirrus 5320 chipset
     = T 132x50  8x8  1056x400   16       .   B800 Chips&Technologies chipset
     = T 132x50  8x16 1056x800   16       .   B800 Chips&Technologies 64310
     = G    .     .    ???x400    .       .     .  Corona/Cordata BIOS 4.10+
     = G  80x25  8x16  640x400  256       .   A000 ATI VGA Wonder,VGA Wonder+
     = G  80x25  8x16  640x400  256       .   A000 ATI Ultra 8514A,ATI XL
     = G  80x25  8x16  640x400    .       .   A000 Diamond Stealth64 Video 2xx1
     = G  80x30  8x16  640x480  256       1   A000 Ahead A, Ahead B (512K)
     = G    .     .    720x540    .       .     .  VEGA VGA
     = G    .     .    720x540   16       .     .  Tatung VGA
     = G    .     .    720x540   16       .     .  Video7 V-RAM VGA
     = G  96x64  8x16  768x1024  16/256K  .   A000 Trident TVGA 88/8900 512K
     = G 128x48  8x16 1024x768  256       .   A000 NCR 77C22 [1,9]
     = G 144x54  8x16 1152x864    .       .   A000 Diamond Stealth64 Video 2xx1
 62h = T 132x32  8x11     .      16/64    6   B800 Quadram Ultra VGA
     = T 132x32  8x12     .      16       .     .  Genoa 6400
     = T 132x32  8x11     .      16       .     .  Genoa SuperEGA BIOS 3.0+
     = T 132x43  8x8  1056x344   16       .   B800 C&T 82C450 BIOS
     = G    .     .    640x450   16       .     .  Cirrus 510/520 chipset
     = G  80x30  8x16  640x480  256       .   A000 ATI VGA Wonder,VGA Wonder+
     = G  80x30  8x16  640x480  256       .   A000 ATI Ultra 8514A,ATI XL
     = G  80x30  8x16  640x480  32K       .   A000 WD90C
     = G  80x30  8x16  640x480  32K       .   A000 Diamond Speedstar 24X
     = G    .     .    800x600    .       .     .  VEGA VGA
     = G    .     .    800x600   16       .     .  Tatung VGA
     = G    .     .    800x600   16       .     .  Video7 V-RAM VGA
     = G 100x75  8x8   800x600  256       1   A000 Ahead A, Ahead B (512K)
     = G 128x48  8x16 1024x768  256/256K  .   A000 Trident TVGA 8900, Zymos
     = G 128x48  8x16 1024x768  256       .   A000 NCR 77C22 [9]
 63h = T 132x44  8x8      .      16/64    5   B800 Quadram Ultra VGA
     = T 132x44  8x8      .      16       .     .  Genoa 6400
     = T 132x44  8x8      .      16       .     .  Genoa SuperEGA BIOS 3.0+
     = G    .     .    720x540   16       .     .  MORSE VGA
     = G    .     .    720x540   16       .     .  Cirrus 510/520 chipset
     = G 100x42  8x14  800x600  256       .   A000 ATI VGA Wonder,VGA Wonder+
     = G 100x42  8x14  800x600  256       .   A000 ATI Ultra 8514A,ATI XL
     = G    .     .    800x600  32K       .   A000 WD90C
     = G    .     .    800x600  32K       .   A000 Diamond Speedstar 24X
     = G 128x48  7x16 1024x768  256       1   A000 Ahead B (1MB)
     = G    .     .   1024x768    2       .     .  Video7 V-RAM VGA
 64h = T 132x60  8x8      .      16       .     .  Genoa 6400
     = T  80x43  8x8   528x344   16       .   B800 C&T 82C450 BIOS
     = G    .     .    640x480  64K       .   A000 Cirrus CL-GD 5422/5426
     = G    .     .    800x600   16       .     .  MORSE VGA
     = G    .     .    800x600   16       .     .  Cirrus 510/520 chipset
     = G    .     .    800x600  ???       .     .  SAMPO-Mira VGA
     = G    .     .   1024x768    4       .     .  Video7 V-RAM VGA
     = G 128x48  8x16 1024x768  256       .   A000 ATI VGA Wonder Plus,ATI XL
     = G 160x64  8x16 1280x1024  16/256K  .   A000 WD90C [1]
     = G 160x64  8x16 1280x1024  16/256K  .   A000 Diamond Speedstar 24X [1]
 65h = T  80x50  8x8   528x400   16       .   B800 C&T 82C450 BIOS
     = G    .     .    800x600  64K       .   A000 Cirrus CL-GD 5422/5426
     = G    .     .   1024x768   16       .     .  Video7 V-RAM VGA
     = G 128x48  8x16 1024x768   16       .   A000 ATI VGA Wonder
 66h = T  80x50  8x8   640x400   16/256K  .   B800 WD90C
     = T  80x50  8x8      .      16       .   B800 Diamond Speedstar 24X
     = G    .     .    640x400  256       .     .  Tatung VGA
     = G    .     .    640x400  256       .     .  Video7 V-RAM VGA
     = G    .     .    640x480  32K       .   A000 Cirrus CL-GD 5422/5426
 67h = T  80x43  8x8   640x344   16/256K  .   B800 WD90C
     = T  80x43  8x8      .      16       .   B800 Diamond Speedstar 24X
     = G    .     .    640x480  256       .     .  Video7 V-RAM VGA
     = G    .     .    800x600  32K       .   A000 Cirrus CL-GD 5422/5426
     = G 128x48  8x16 1024x768    4       .   A000 ATI VGA Wonder
     = G 160x64  8x16 1280x1024  16       .   A000 NCR 77C22 [1,9]
 68h = G  80x25  8x16  640x400    .       .   A000 Diamond Stealth64 Video 2xx1
 69h = T 132x50  8x8  1056x400   16/256K  .   B800 WD90C
     = T 132x50  8x8      .      16       .   B800 Diamond Speedstar 24X
     = G  80x30  8x16  640x480    .       .   A000 Diamond Stealth64 Video 2xx1
     = G    .     .    720x540  256       .   A000 Video7 V-RAM VGA
 6Ah = G    .     .    800x600   16       .   A000 VESA standard interface
     = G 100x75  8x8   800x600   16       .   A000 Genoa 6400
     = G 100x75  8x8   800x600   16       .   A000 Diamond Speedstar 24X
     = G    .     .    800x600   16       .   A000 Ahead A
     = G 100x75  8x8   800x600   16       1   A000 Ahead B (VESA) [see 71h]
     = G    .     .    800x600   16       .     .  Zymos Poach, Hi Res 512
     = G    .     .    800x600   16       .     .  Epson LT-386SX in CRT Mode
     = G    .     .    800x600   16       .     .  Compuadd 316SL in CRT Mode
     = G 100x37  8x16  800x600   16/256K  .   A000 Cirrus CL-GD5420/5422/5426
     = G 100x37  8x16  800x600   16       .   A000 Diamond Stealth64 Video 2xx1
     = G 100x42  8x14  800x600    .       .   A000 ATI VGA Wonder (undoc)
     = G    .     .    800x600   16       .   A000 Chips&Technologies chipset
     = G 160x64  8x16 1280x1024 256       .   A000 NCR 77C22 [1,9]
 6Bh = T 100x37  8x16     .      16       .     .  Genoa 6400
     = T 100x37  8x16     .       .       .     .  NEL Electronics BIOS
     = G 100x37  8x16  800x600    .       .   A000 Diamond Stealth64 Video 2xx1
 6Ch = G  80x30  8x16  640x480   16M      .   A000 Trident 8900CL/BIOS C04
     = G 100x75  8x8   800x600  256       .     .  Genoa 6400
     = G 128x48  8x16 1024x768    2       .   A000 Diamond Stealth64 Video 2xx1
     = G 160x60  8x16 1280x960   16/256K  .   A000 WD90C [1]
     = G 160x60  8x16 1280x960   16/256K  .   A000 Diamond Speedstar 24X [1]
     = G 160x64  8x16 1280x1024  16/256K  .   A000 Cirrus CL-GD 5422/5426 [1]
 6Dh = G  80x25  8x14  640x350   64K      .   A000 STB Lightspeed ET4000/W32P
     = G 128x48  8x16 1024x768    .       .   A000 Diamond Stealth64 Video 2xx1
     = G 160x64  8x16 1280x1024 256/256K  .   A000 Cirrus CL-GD 5422/5426 [1]
 6Eh = G  40x25  8x8   320x200   64K      .   A000 Cirrus CL-GD 5422/5426
     = G 160x64  8x16 1280x1024   2       .   A000 Diamond Stealth64 Video 2xx1
 6Fh = G  40x25  8x8   320x200   16M      .   A000 Cirrus CL-GD 5422/5426
     = G 160x64  8x16 1280x1024   .       .   A000 Diamond Stealth64 Video 2xx1
 70h =  extended mode set (see AX=0070h)        .  Everex Micro Enhancer EGA
     = T  40x25  8x8      .      16       8   B800 Quadram (CGA double scan)
     = T  40x25  8x8   (CGA dblscan)      .     .  Genoa SuperEGA BIOS 3.0+
     = G    .     .    360x480  256       .     .  Cirrus 510/520/5320 chips
     = G  90x28  8x14  720x392   16       1   A000 Ahead B
     = G  80x30  8x16  640x480    .       .   A000 Diamond Stealth64 Video 2xx1
     = G 100x38  8x16  800x600   16       .   A000 C&T chipset, Cardinal
     = G    .     .   1024x480  256       .   A000 Trident 8900C BIOS C3.0
 71h = T  80x25  8x8      .      16       8   B800 Quadram (CGA double scan)
     = T  80x25  8x8   (CGA dblscan)      .     .  Genoa SuperEGA BIOS 3.0+
     = G    .     .    528x400  256       .     .  Cirrus 510/520 chipset
     = G  80x30  8x16  640x480   16M      .   A000 Cirrus CL-GD 5422/5426
     = G  80x30  8x16  640x480    .       .   A000 Diamond Stealth64 Video 2xx1
     = G 100x35  8x16  800x600   16/64    .   A000 NSI Smart EGA+
     = G 100x75  8x8   800x600   16       1   A000 Ahead B (same as 6Ah)
     = G    .     .    960x720   16       .     .  C&T chipset, Cardinal
     = G    .     .   1024x480  256       .   A000 Trident 8900C BIOS C3.0
 72h = T  80x60  8x8      .      16       .   B800 Quadram Ultra VGA
     = T  80x60  8x8      .      16       .   B800 Genoa 6400
     = T  80x60  8x8      .      16       .   B800 Genoa SuperEGA BIOS 3.0+
     = G    .     .    528x480  256       .     .  Cirrus 510/520 chipset
     = G  80x25  8x19  640x480   16       1   A000 DOS/V w/ any VGA
     = G  80x30  8x16  640x480    .       .   A000 Diamond Stealth64 Video 2xx1
     = G    .     .    640x480  32K       .   A000 ATI
     = G    .     .    640x480  16M       .   A000 WD90C
     = G    .     .    640x480  16M       .   A000 Diamond Speedstar 24X
     = G    .     .   1024x768   16       .     .  C&T chipset, Cardinal
     = G 128x48  8x16 1024x768i  16       .   A000 C&T 82C450 BIOS
     = G 128x48  8x16 1024x768   16       .   A000 C&T 65530 BIOS (multisync)
 73h = G  80x60  8x8   640x480   16       .   A000 Quadram Ultra VGA
     = G  80x60  8x8   640x480   16       .     .  Genoa 6400
     = G  80x60  8x8   640x480   16       .     .  Genoa SuperEGA BIOS 3.0+
     = G 100x37  8x16  800x600    .       .   A000 Diamond Stealth64 Video 2xx1
     = T  80x25  8x19  640x475   16       1   none DOS/V, emulated in VGA graph
 74h = T  80x66  8x8      .      16       .   B800 Quadram Ultra VGA
     = T  80x66  8x8      .      16       .   B800 Genoa 6400
     = T  80x66  8x8      .      16       .   B800 Genoa SuperEGA BIOS 3.0+
     = G    .     .    640x400    2       .   B800 Toshiba 3100 AT&T mode
     = G  80x30  8x16  640x480   32K      .   A000 Trident 8900C/BIOS C03
     = G 100x37  8x16  800x600    .       .   A000 Diamond Stealth64 Video 2xx1
     = G 128x48  8x16 1024x768   16       1   A000 Ahead A, Ahead B (512K)
     = G    .     .   1024x768   64K      .   A000 Cirrus CL-GD 5422/5426 [1]
 75h = G  80x30  8x16  640x480   64K      .   A000 Trident 8900C/BIOS C03
     = G  80x66   .    640x528   16???    .   A000 Quadram Ultra VGA
     = G  80x66   .    640x528   16       .     .  Genoa SuperEGA BIOS 3.0+
     = G 100x37  8x16  800x600    .       .   A000 Diamond Stealth64 Video 2xx1
     = G 128x48  8x16 1024x768    4       1   A000 Ahead B
     = G 128x48  8x16 1024x768   16       .   A000 Chips&Technologies 64310
 76h = T  94x29  8x14     .      16       .   B800 Quadram Ultra VGA
     = T  94x29  8x14     .       .       .     .  Genoa SuperEGA BIOS 3.0+
     = G 100x75  8x8   800x600   32K      .   A000 Trident 8900C/BIOS C03
     = G 128x48  8x16 1024x768    2       1   A000 Ahead B
     = G 128x48  8x16 1024x768    .       .   A000 Diamond Stealth64 Video 2xx1
     = G 160x64  8x16 1280x1024  16       .   A000 Chips&Technologies 64310 [1]
 77h = G  94x29   .    752x410   16???    .   A000 Quadram Ultra VGA
     = G  94x29   .    752x410   16       .     .  Genoa SuperEGA BIOS 3.0+
     = G 100x75  8x8   800x600   64K      .   A000 Trident 8900C/BIOS C03
     = G 128x48  8x16 1024x768    .       .   A000 Diamond Stealth64 Video 2xx1
 78h = T 100x37  8x16     .      16       .     .  Genoa 6400
     = T 100x75  8x8      .      16       .   B800 Quadram Ultra VGA
     = T 100x75  8x8      .       .       .     .  Genoa SuperEGA BIOS 3.0+
     = G    .     .    640x400  256       .     .  STB VGA/EM-16 Plus
     = G  80x25  8x16  640x400  256       .     .  Cardinal, C&T chipset
     = G    .     .    640x400  256       .     .  Cirrus 5320 chipset
     = G  80x25  8x16  640x400  256       .   A000 Chips&Technologies 64310
 79h = G  80x30  8x16  640x480  256       .     .  Cardinal, C&T chipset
     = G  80x30  8x16  640x480  256       .   A000 Chips&Technologies 64310
     = G 100x75   .    800x600   16???    .   A000 Quadram Ultra VGA
     = G 100x75  8x8   800x600   16       .     .  Genoa SuperEGA BIOS 3.0+
     = G 100x75  8x8   800x600   16       .     .  Genoa 6400
 7Ah = T 114x60  8x8      .      16       .   B800 Quadram Ultra VGA
     = T 114x60  8x8      .       .       .     .  Genoa SuperEGA BIOS 3.0+
     = G    .     .    720x540  256       .     .  C&T chipset, Cardinal
 7Bh = G    .     .    800x600  256       .     .  C&T chipset, Cardinal
     = G 114x60   .    912x480   16???    .   A000 Quadram Ultra VGA
     = G    .     .    912x480   16       .     .  Genoa SuperEGA BIOS 3.0+
 7Ch = G    .     .    512x512   16       .     .  Genoa
     = G 100x37  8x16  800x600  256       .     .  C&T 82C453/F65530 chipsets
     = G 100x37  8x16  800x600  256       .   A000 Chips&Technologies 64310
     = G 200x75  8x16 1600x1200   . [16]  .   A000 Diamond Stealth64 Video 2xx1
 7Dh = G  64x32  8x16  512x512  256       .     .  Genoa
 7Eh =  special mode set (see AX=007Eh)         .  Paradise VGA, AT&T VDC600
     = G  80x25  8x16  640x400  256       .     .  Genoa 6400
     = G    .     .   1024x768  256       .     .  C&T 82C453 chipset
     = G 128x48  8x16 1024x768  256       .   A000 Chips&Technologies 64310
     = G  90x43   .       .     mono      .   B000 HERCULES.COM on HGC [14]
 7Fh =  special function set (see AX=007Fh/BH=00h) Paradise VGA, AT&T VDC600
     = G 128x48  8x16 1024x768    4       .     .  Genoa 6400
     = G  90x29   .       .     mono      .   B000 HERCULES.COM on HGC [14]
 82h = T  80x25   .       .     B&W       .     .  AT&T VDC overlay mode [6]
 83h = T  80x25   .       .       .       .     .  AT&T VDC overlay mode [6]
 86h = G    .     .    640x200  B&W       .     .  AT&T VDC overlay mode [6]
 88h = G  90x43  8x8   720x348  mono      .   B000 Hercules + MSHERC.COM
 C0h = G    .     .    640x400  2/prog palette  .  AT&T VDC overlay mode [6]
     = G    .     .    640x400  2/prog palette  .  Olivetti Quaderno overlay
 C4h =  disable output    .       .       .     .  AT&T VDC overlay mode [6]
 C8h = G  80x50  8x8   640x400    2       .   B800 Olivetti Quaderno overlay
 D0h = G    .     .    640x400    2       .   B800 DEC VAXmate AT&T mode
Notes:
[1] interlaced only
[2] for ATI EGA Wonder, mode 08h is only valid if SMS.COM is loaded resident.
      SMS maps mode 08h to mode 27h if the byte at location 0040:0063 is 0B4h,
      otherwise to mode 23h, thus selecting the appropriate (monochrome or
      color) 132x25 character mode.
    for ATI VGA Wonder, mode 08h is the same, and only valid if VCONFIG loaded
      resident
[3] early XGA boards support 132-column text but do not have this BIOS mode
[4] DESQview intercepts calls to change into these two modes (21h is page 0,
      22h is page 1) even if there is no Hercules graphics board installed
[5] ATI BIOS v4-1.00 has a text-scrolling bug in this mode
[6] for AT&T VDC overlay modes, BL contains the DEB mode, which may be 06h,
      40h, or 44h
[7] BIOS text support is broken in this undocumented mode; scrolling moves
      only about 1/3 of the screen (and does even that portion incorrectly),
      while screen clears only clear about 3/4.
[8] The Oak OTI-037/067/077 modes are present in the Oak VGA BIOS, which OEMs
      may choose to use only partially or not at all; thus, not all Oak boards
      support all "Oak" modes listed here
[9] this card uses the full 128K A000h-BFFFh range for the video buffer,
      precluding the use of a monochrome adapter in the same system
[10] mode 17h supported by Tseng ET4000 BIOS 8.01X dated 09/14/90, but not
      v8.01X dated 02/28/92; mode 21h supported by 02/28/92 version but not
      09/14/90 version
[11] HERKULES simulates a 90x45 text mode in Hercules graphics mode; the
      installation check for HERKULES.COM is the signature "Herkules" two
      bytes beyond the INT 10 handler
[12] The Realtek RTVGA BIOS v3.C10 crashes when attempting to switch into
      modes 21h or 27h; this version of the BIOS also sets the BIOS data area
      incorrectly for extended text modes, resulting in scrolling after only
      24 lines (the VMODE.EXE   utility does set the data area correctly)
[13] The Tandy 1000SL/TL BIOS does not actually support this mode
[14] HERCULES.COM is a graphics-mode BIOS extension for Hercules-compatible
      graphics cards by Soft Warehouse, Inc.  Its installation check is to
      test whether the word preceding the INT 10 handler is 4137h.
[15] The Hercules-graphics video modes for HERCBIOS (shareware by Dave
      Tutelman) may be changed by a command-line switch; the 90x43
      character-cell mode's number is always one higher than the 90x29 mode
      (whose default is mode 08h)
[16] Stealth64 Video 2001-series BIOS v1.03 reports 76 lines for mode 7Ch,
      resulting in incorrect scrolling for TTY output (scrolling occurs only
      after the end of the 76th line, which is not displayed)
[17] For 43-line text on EGA or 43/50-line text on VGA, you must load an 8x8
      font using AX=1102h after switching to mode 3; VGA may also require
      using INT 10/AH=12h/BL=30h
SeeAlso: #00011,#00083,#00191
Index:  video modes
Index:  installation check;HERKULES|installation check;HERCULES.COM
--------V-100070-----------------------------
INT 10 - VIDEO - Everex Micro Enhancer EGA/Viewpoint VGA - EXTENDED MODE SET
        AX = 0070h
        BL = mode (see #00011)
Desc:   specify a proprietary display mode on the Everex Micro Enhancer or
          Viewpoint video adapters
SeeAlso: AH=00h,AX=6F05h,AX=7000h/BX=0004h,AH=FFh"GO32"

(Table 00011)
Values for Everex video mode:
     text/ text pixel   pixel   colors disply scrn monitor    adapter
     grph resol  box  resolution       pages  addr
 00h = G    .     .    640x480   16       .     .  multisync  EGA,VGA
 01h = G    .     .    752x410   16       .     .  multisync  EGA,VGA
 02h = G    .     .    800x600   16       .     .  multisync  EGA,VGA
 03h = T  80x34   .       .       .       .     .  multisync  EGA,VGA
 04h = T  80x60   .       .       .       .     .  multisync  EGA,VGA
 05h = T  94x29   .       .       .       .     .  multisync  EGA only
 06h = T  94x51   .       .       .       .     .  multisync  EGA only
 07h = T 100x43  8x14     .      16       .     .  .          VGA only
 08h = T 100x75  8x8      .      16       .     .  .          VGA only
 09h = T  80x44   .       .       .       .     .  EGA        EGA only
 0Ah = T 132x25   .       .       .       .     .  EGA        EGA,VGA
 0Bh = T 132x44   .       .       .       .     .  EGA        EGA,VGA
 0Ch = T 132x25   .       .       .       .     .  CGA        EGA only
 0Dh = T  80x44   .       .       .       .     .  mono       EGA only
 0Eh = T 132x25   .       .       .       .     .  mono
 0Fh = T 132x44   .       .       .       .     .  mono
 10h =  reserved
 11h = G    .     .   1280x350    4       .     .  .          EGA only
 12h = G    .     .   1280x600    4       .     .  .          EGA only
 13h = G    .     .    640x350  256       .     .  .          EGA,EV673
 14h = G    .     .    640x400  256       .     .  .
 15h = G    .     .    512x480  256       .     .  .
 16h = T  80x30  8x16     .     256       .     .  .          VGA only
 18h = T 100x27  8x16     .      16       .     .  .          VGA only
 20h = G    .     .   1024x768   16       .     .  .          Everex 629,678
            .     .       .       .       .     .  .          Everex EV-673
 21h = T 160x64  8x16 1280x1024  16       .     .  .          1MB VGA only
 30h = G    .     .    640x480  256       .     .  .          Everex 629,678
            .     .       .       .       .     .  .          Everex EV-673
 31h = G    .     .    800x600  256       .     .  .          Everex 629,678
            .     .       .       .       .     .  .          Everex EV-673
 32h = G 128x48  8x16 1024x768  256       .     .  .          1MB VGA only
 40h = T 132x30  8x16     .      16       .     .  .          VGA only
 50h = T 132x32  8x16     .     mono      .     .  .          VGA only
 62h = G  40x25  8x8   320x200  32K       .     .  .          Vwpt TC (EV629)
 70h = G  64x30  8x16  512x480  32K       .     .  .          Viewpoint TC
 71h = G  80x30  8x16  640x480  32K       .     .  .          Viewpoint TC
 76h = G  64x30  8x16  512x480  16M       .     .  .          Viewpoint TC
 77h = G  80x30  8x16  640x480  16M       .     .  .          Viewpoint TC
SeeAlso: #00010,#00191
Index:  video modes;Everex
--------V-10007E-----------------------------
INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - SET SPECIAL MODE
        AX = 007Eh
        BX = horizontal dimension of the mode desired
        CX = vertical dimension of the mode desired
            (both BX/CX in pixels for graphics modes, rows for alpha modes)
        DX = number of colors of the mode desired (0000h for monochrome modes)
Return: BH = 7Eh if successful (Paradise VGA)
        AL = 7Eh if successful (AT&T VDC600)
Desc:   specify a display mode by resolution rather than mode number
SeeAlso: AH=00h,AX=0070h,AX=007Fh/BH=00h,AX=6F05h,AH=FFh"GO32"
Index:  video modes;Paradise|video modes;AT&T
--------V-10007FBH00-------------------------
INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - SET VGA OPERATION
        AX = 007Fh
        BH = 00h
Return: AL = 7Fh if successful (AT&T VDC600)
        BH = status (Paradise/Dell)
            00h invalid function
            7Fh successful
SeeAlso: AX=007Fh/BH=01h,AX=007Fh/BH=02h
--------V-10007FBH01-------------------------
INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - SET NON-VGA OPERATION
        AX = 007Fh
        BH = 01h
Return: AL = 7Fh if successful (AT&T VDC600)
        BH = status (Paradise/Dell)
            00h invalid function
            7Fh successful
Note:   color modes (0,1,2,3,4,5,6) will set non-VGA CGA operation, monochrome
          mode 7 will set non-VGA MDA/Hercules operation
SeeAlso: AX=007Fh/BH=00h,AX=007Fh/BH=02h
--------V-10007FBH02-------------------------
INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - QUERY MODE STATUS
        AX = 007Fh
        BH = 02h
Return: AL = 7Fh if successful (AT&T VDC600)
        BH = status (Paradise/Dell)
            00h invalid function
            7Fh successful
        ---if successful---
        BL = 00h if operating in VGA mode, 01h if non-VGA mode
        CH = total video RAM size in 64k byte units
        CL = video RAM used by the current mode
Note:   under Novell DOS 7 TaskMgr Multitasker, this call always returns 0K
          video memory in CX
SeeAlso: AX=007Fh/BH=00h,AX=007Fh/BH=01h
--------V-10007FBH03-------------------------
INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - LOCK CURRENT MODE
        AX = 007Fh
        BH = 03h
Return: AL = 7Fh if successful (AT&T VDC600)
        BH = status (Paradise/Dell)
            00h invalid function
            7Fh successful
Desc:   allows current mode (VGA or non-VGA) to survive re-boot
SeeAlso: AX=007Eh,AX=007Fh/BH=04h,AX=007Fh/BH=06h,AH=FFh"Oak"
--------V-10007FBH04-------------------------
INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - ENTER MDA EMULATION MODE
        AX = 007Fh
        BH = 04h
Return: AL = 7Fh if successful (AT&T VDC600)
        BH = status (Paradise/Dell)
            00h invalid function
            7Fh successful
SeeAlso: AX=007Eh,AX=007Fh/BH=03h,AX=007Fh/BH=05h,AH=FFh"Oak"
--------V-10007FBH05-------------------------
INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - ENTER CGA EMULATION MODE
        AX = 007Fh
        BH = 05h
Return: AL = 7Fh if successful (AT&T VDC600)
        BH = status (Paradise/Dell)
            00h invalid function
            7Fh successful
SeeAlso: AX=007Eh,AX=007Fh/BH=03h,AX=007Fh/BH=04h,AH=FFh"Oak"
--------V-10007FBH06-------------------------
INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - ENTER MONOCHROME VGA MODE
        AX = 007Fh
        BH = 06h
Return: AL = 7Fh if successful (AT&T VDC600)
        BH = status (Paradise/Dell)
            00h invalid function
            7Fh successful
Note:   this function also switches to video mode 7
SeeAlso: AX=007Eh,AX=007Fh/BH=03h,AX=007Fh/BH=07h,AH=FFh"Oak"
--------V-10007FBH07-------------------------
INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - ENTER COLOR VGA MODE
        AX = 007Fh
        BH = 07h
Return: AL = 7Fh if successful (AT&T VDC600)
        BH = status (Paradise/Dell)
            00h invalid function
            7Fh successful
Note:   this function also switches to video mode 3
SeeAlso: AX=007Eh,AX=007Fh/BH=03h,AX=007Fh/BH=06h,AH=FFh"Oak"
--------V-10007F-----------------------------
INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - EXTENDED DATA REGISTER ACCESS
        AX = 007Fh
        BH = function
            0Ah,0Bh,0Ch,0Dh,0Eh,0Fh  WRITE PARADISE REGISTERS 0,1,2,3,4,5
                (port 03CEh indices 0Ah,0Bh,0Ch,0Dh,0Eh,0Fh)
                BL = value to set in the paradise register
            1Ah,1Bh,1Ch,1Dh,1Eh,1Fh READ PARADISE REGISTERS 0,1,2,3,4,5
                (port 03CEh indices 0Ah,0Bh,0Ch,0Dh,0Eh,0Fh)
                Return: BL = value of the paradise register
                        BH = 7Fh if successful
            29h-2Fh ??? (Paradise VGA for Dell, 7/24/91)
Return: AL = 7Fh if successful (AT&T VDC600)
        BH = status (Paradise/Dell)
            00h invalid function
            7Fh successful
SeeAlso: AX=007Eh,AX=007Fh/BH=03h,AX=007Fh/BH=05h,AH=FFh"Oak"
--------V-10007FBH60-------------------------
INT 10 - Paradise VGA - ???
        AX = 007Fh
        BH = 60h
        BL = ??? (00h-13h)
        ???
Return: BH = status (00h failed or not supported, 7Fh successful)
        ???
Note:   this function is supported by the 5/14/93 ROM for the Dell 486D
SeeAlso: AX=007Fh/BH=61h
--------V-10007FBH61-------------------------
INT 10 - Paradise VGA - ???
        AX = 007Fh
        BH = 61h
        ES:DI -> buffer for list of ??? (see #00012)
Return: BH = status (00h failed or not supported, 7Fh successful)
        ???
Note:   this function is supported by the 5/14/93 ROM for the Dell 486D
SeeAlso: AX=007Fh/BH=60h

Format of Paradise VGA list entry:
Offset  Size    Description     (Table 00012)
 00h    BYTE    ??? or 00h if end of list
 01h    BYTE    ???
 02h    WORD    ???
 04h    WORD    ???
 06h    WORD    ???
--------V-10007FBXA500-----------------------
INT 10 - Paradise VGA - ???
        AX = 007Fh
        BX = A500h
        ???
Return: BH = status (00h failed or not supported, 7Fh successful)
        ???
Note:   this function is supported by the 5/14/93 ROM for the Dell 486D
SeeAlso: AX=007Fh/BH=A6h
--------V-10007FBHA5-------------------------
INT 10 - Paradise VGA - ???
        AX = 007Fh
        BH = A5h
        BL = ???
            bits 3-0: ??? (0-4)
            bits 5,4: ???
        ???
Return: BH = status (00h failed or not supported, 7Fh successful)
        ???
Note:   this function is supported by the 5/14/93 ROM for the Dell 486D
--------V-10007FBHA6-------------------------
INT 10 - Paradise VGA - ???
        AX = 007Fh
        BH = A6h
        ???
Return: BH = status (00h failed or not supported, 7Fh successful)
        ???
Note:   this function is supported by the 5/14/93 ROM for the Dell 486D
SeeAlso: AX=007Fh/BH=A5h
--------V-1001-------------------------------
INT 10 - VIDEO - SET TEXT-MODE CURSOR SHAPE
        AH = 01h
        CH = cursor start and options (see #00013)
        CL = bottom scan line containing cursor (bits 0-4)
Return: nothing
Desc:   specify the starting and ending scan lines to be occupied by the
          hardware cursor in text modes
Notes:  buggy on EGA systems--BIOS remaps cursor shape in 43 line modes, but
          returns unmapped cursor shape
        UltraVision scales size to the current font height by assuming 14-line
          monochrome and 8-line color fonts; this call is not valid if cursor
          emulation has been disabled
        applications which wish to change the cursor by programming the
          hardware directly on EGA or above should call INT 10/AX=1130h or
          read 0040h:0085h first to determine the current font height
        on some adapters, setting the end line greater than the number of lines
          in the font will result in the cursor extending to the top of the
          next character cell on the right
BUG:    AMI 386 BIOS and AST Premier 386 BIOS will lock up the system if AL
          is not equal to the current video mode
SeeAlso: AH=03h,AX=CD05h,AH=12h/BL=34h,#03885

Bitfields for cursor start and options:
Bit(s)  Description     (Table 00013)
 7      should be zero
 6,5    cursor blink
        (00=normal, 01=invisible, 10=erratic, 11=slow)
        (00=normal, other=invisible on EGA/VGA)
 4-0    topmost scan line containing cursor
--------V-1002-------------------------------
INT 10 - VIDEO - SET CURSOR POSITION
        AH = 02h
        BH = page number
            0-3 in modes 2&3
            0-7 in modes 0&1
            0 in graphics modes
        DH = row (00h is top)
        DL = column (00h is left)
Return: nothing
SeeAlso: AH=03h,AH=05h,INT 60/DI=030Bh,MEM 0040h:0050h
--------V-1003-------------------------------
INT 10 - VIDEO - GET CURSOR POSITION AND SIZE
        AH = 03h
        BH = page number
            0-3 in modes 2&3
            0-7 in modes 0&1
            0 in graphics modes
Return: AX = 0000h (Phoenix BIOS)
        CH = start scan line
        CL = end scan line
        DH = row (00h is top)
        DL = column (00h is left)
Notes:  a separate cursor is maintained for each of up to 8 display pages
        many ROM BIOSes incorrectly return the default size for a color display
          (start 06h, end 07h) when a monochrome display is attached
SeeAlso: AH=01h,AH=02h,AH=12h/BL=34h,MEM 0040h:0050h,MEM 0040h:0060h
--------V-1004-------------------------------
INT 10 - VIDEO - READ LIGHT PEN POSITION (except VGA)
        AH = 04h
Return: AH = light pen trigger flag
            00h not down/triggered
            01h down/triggered
                DH,DL = row,column of character light pen is on
                CH = pixel row (graphics modes 04h-06h)
                CX = pixel row (graphics modes with >200 rows)
                BX = pixel column
Desc:   determine the current position and status of the light pen (if
          present)
Notes:  on a CGA, returned column numbers are always multiples of 2 (320-
          column modes) or 4 (640-column modes)
        returned row numbers are only accurate to two lines
--------V-1004------------------------------------
INT 10 - HUNTER 16 - GET CURSOR ADDRESS
        AH = 04h
        BH = page
Return: DH = row (0..24)
        DL = column (0..79)
        CH = cursor pixel Y-address (0..199)
        CL = cursor pixel X-address (0..639)
Notes:  the Husky Hunter 16 is an 8088-based ruggedized laptop.  Other family
          members are the Husky Hunter, Husky Hunter 16/80, and Husky Hawk.
        pixel coordinates are for the lower left corner of the character cell
          containing the cursor
SeeAlso: AH=60h"HUNTER"
--------V-1005-------------------------------
INT 10 - VIDEO -  SELECT ACTIVE DISPLAY PAGE
        AH = 05h
        AL = new page number (00h to number of pages - 1) (see #00010)
Return: nothing
Desc:   specify which of possibly multiple display pages will be visible
Note:   to determine whether the requested page actually exists, use AH=0Fh
          to query the current page after making this call
SeeAlso: AH=0Fh,AH=43h,AH=45h,MEM 0040h:0062h,MEM 0040h:004Eh
--------V-100500-----------------------------
INT 10 - VIDEO - Corona/Cordata BIOS v4.10+ - SET GRAPHICS BITMAP BUFFER
        AX = 0500h
        BX = segment of buffer
Return: nothing
Desc:   set the address of graphics bitmap buffer for video modes 60h and 61h
SeeAlso: AX=050Fh"Corona"
--------V-10050F-----------------------------
INT 10 - VIDEO - Corona/Cordata BIOS v4.10+ - GET GRAPHICS BITMAP BUFFER
        AX = 050Fh
Return: DX = segment of graphics bitmap buffer
Desc:   get the address of graphics bitmap buffer for video modes 60h and 61h
SeeAlso: AX=0500h"Corona"
--------V-100580-----------------------------
INT 10 - VIDEO - PCjr, Tandy 1000 - GET CRT/CPU PAGE REGISTERS
        AX = 0580h
Return: BH = CRT page register
        BL = CPU page register
Notes:  the CPU page determines which 16K block of the first 128K of physical
          memory will be mapped at B800h by the hardware
        the CRT page determines the start address of the memory used by the
          video controller
SeeAlso: AH=05h"SET CRT/CPU"
--------V-1005-------------------------------
INT 10 - VIDEO - PCjr, Tandy 1000 - SET CRT/CPU PAGE REGISTERS
        AH = 05h
        AL = subfunction
            81h set CPU page register
                BL = CPU page
            82h set CRT page register
                BH = CRT page
            83h set both CPU and CRT page registers
                BL = CPU page
                BH = CRT page
Return: nothing
Notes:  the CPU page determines which 16K block of the first 128K of physical
          memory will be mapped at B800h by the hardware
        the CRT page determines the start address of the memory used by the
          video controller
SeeAlso: AX=0580h
--------V-1006-------------------------------
INT 10 - VIDEO - SCROLL UP WINDOW
        AH = 06h
        AL = number of lines by which to scroll up (00h = clear entire window)
        BH = attribute used to write blank lines at bottom of window
        CH,CL = row,column of window's upper left corner
        DH,DL = row,column of window's lower right corner
Return: nothing
Note:   affects only the currently active page (see AH=05h)
BUGS:   some implementations (including the original IBM PC) have a bug which
          destroys BP
        the Trident TVGA8900CL (BIOS dated 9/8/92) clears DS to 0000h when
          scrolling in an SVGA mode (800x600 or higher)
SeeAlso: AH=07h,AH=12h"Tandy 2000",AH=72h,AH=73h,AX=7F07h,INT 50/AX=0014h
--------V-1007-------------------------------
INT 10 - VIDEO - SCROLL DOWN WINDOW
        AH = 07h
        AL = number of lines by which to scroll down (00h=clear entire window)
        BH = attribute used to write blank lines at top of window
        CH,CL = row,column of window's upper left corner
        DH,DL = row,column of window's lower right corner
Return: nothing
Note:   affects only the currently active page (see AH=05h)
BUGS:   some implementations (including the original IBM PC) have a bug which
          destroys BP
        the Trident TVGA8900CL (BIOS dated 9/8/92) clears DS to 0000h when
          scrolling in an SVGA mode (800x600 or higher)
SeeAlso: AH=06h,AH=12h"Tandy 2000",AH=72h,AH=73h,INT 50/AX=0014h
--------V-1008-------------------------------
INT 10 - VIDEO - READ CHARACTER AND ATTRIBUTE AT CURSOR POSITION
        AH = 08h
        BH = page number (00h to number of pages - 1) (see #00010)
Return: AH = character's attribute (text mode only) (see #00014)
        AH = character's color (Tandy 2000 graphics mode only)
        AL = character
Notes:  for monochrome displays, a foreground of 1 with background 0 is
          underlined
        the blink bit may be reprogrammed to enable intense background colors
          using AX=1003h or by programming the CRT controller
        the foreground intensity bit (3) can be programmed to switch between
          character sets A and B on EGA and VGA cards, thus enabling 512
          simultaneous characters on screen.  In this case the bit's usual
          function (intensity) is regularly turned off.
        in graphics modes, only characters drawn with white foreground pixels
          are matched by the pattern-comparison routine
        on the Tandy 2000, BH=FFh specifies that the current page should be
          used
BUG:    some IBM PC ROM BIOSes destroy BP when in graphics modes
SeeAlso: AH=09h,AX=1003h,AX=1103h,AH=12h/BL=37h,AX=5001h

Bitfields for character's display attribute:
Bit(s)  Description     (Table 00014)
 7      foreground blink or (alternate) background bright (see also AX=1003h)
 6-4    background color (see #00015)
 3      foreground bright or (alternate) alternate character set (see AX=1103h)
 2-0    foreground color (see #00015)
SeeAlso: #00026

(Table 00015)
Values for character color:
        Normal          Bright
 000b   black           dark gray
 001b   blue            light blue
 010b   green           light green
 011b   cyan            light cyan
 100b   red             light red
 101b   magenta         light magenta
 110b   brown           yellow
 111b   light gray      white
--------V-1009-------------------------------
INT 10 - VIDEO - WRITE CHARACTER AND ATTRIBUTE AT CURSOR POSITION
        AH = 09h
        AL = character to display
        BH = page number (00h to number of pages - 1) (see #00010)
            background color in 256-color graphics modes (ET4000)
        BL = attribute (text mode) or color (graphics mode)
            if bit 7 set in <256-color graphics mode, character is XOR'ed
              onto screen
        CX = number of times to write character
Return: nothing
Notes:  all characters are displayed, including CR, LF, and BS
        replication count in CX may produce an unpredictable result in graphics
          modes if it is greater than the number of positions remaining in the
          current row
SeeAlso: AH=08h,AH=0Ah,AH=4Bh"GRAFIX",INT 17/AH=60h,INT 1F"SYSTEM DATA"
SeeAlso: INT 43"VIDEO DATA",INT 44"VIDEO DATA"
--------V-100A-------------------------------
INT 10 - VIDEO - WRITE CHARACTER ONLY AT CURSOR POSITION
        AH = 0Ah
        AL = character to display
        BH = page number (00h to number of pages - 1) (see #00010)
            background color in 256-color graphics modes (ET4000)
        BL = attribute (PCjr, Tandy 1000 only) or color (graphics mode)
            if bit 7 set in <256-color graphics mode, character is XOR'ed
              onto screen
        CX = number of times to write character
Return: nothing
Notes:  all characters are displayed, including CR, LF, and BS
        replication count in CX may produce an unpredictable result in graphics
          modes if it is greater than the number of positions remaining in the
          current row
SeeAlso: AH=08h,AH=09h,AH=11h"Tandy 2000",AH=4Bh,INT 17/AH=60h
SeeAlso: INT 1F"SYSTEM DATA",INT 43"VIDEO DATA",INT 44"VIDEO DATA"
--------V-100B--BH00-------------------------
INT 10 - VIDEO - SET BACKGROUND/BORDER COLOR
        AH = 0Bh
        BH = 00h
        BL = background/border color (border only in text modes)
Return: nothing
SeeAlso: AH=0Bh/BH=01h
--------V-100B--BH01-------------------------
INT 10 - VIDEO - SET PALETTE
        AH = 0Bh
        BH = 01h
        BL = palette ID
            00h background, green, red, and brown/yellow
            01h background, cyan, magenta, and white
Return: nothing
Note:   this call was only valid in 320x200 graphics on the CGA, but newer
          cards support it in many or all graphics modes
SeeAlso: AH=0Bh/BH=00h,MEM 0040h:0066h
--------V-100B--BH02-------------------------
INT 10 - Tandy 2000 - VIDEO - SET PALETTE ENTRY
        AH = 0Bh
        BH = 02h
        BL = palette entry number
        AL = new color value for palette entry
Return: nothing
Note:   this interrupt is identical to INT 52 for Tandy 2000
SeeAlso: INT 10/AH=00h,INT 10/AH=0Bh/BH=01h,INT 52"Tandy 2000"
--------V-100C-------------------------------
INT 10 - VIDEO - WRITE GRAPHICS PIXEL
        AH = 0Ch
        BH = page number
        AL = pixel color
            if bit 7 set, value is XOR'ed onto screen except in 256-color modes
        CX = column
        DX = row
Return: nothing
Desc:   set a single pixel on the display in graphics modes
Notes:  valid only in graphics modes
        BH is ignored if the current video mode supports only one page
SeeAlso: AH=0Dh,AH=46h
--------V-100D-------------------------------
INT 10 - VIDEO - READ GRAPHICS PIXEL
        AH = 0Dh
        BH = page number
        CX = column
        DX = row
Return: AL = pixel color
Desc:   determine the current color of the specified pixel in grahics modes
Notes:  valid only in graphics modes
        BH is ignored if the current video mode supports only one page
SeeAlso: AH=0Ch,AH=47h
--------V-100E-------------------------------
INT 10 - VIDEO - TELETYPE OUTPUT
        AH = 0Eh
        AL = character to write
        BH = page number
        BL = foreground color (graphics modes only)
Return: nothing
Desc:   display a character on the screen, advancing the cursor and scrolling
          the screen as necessary
Notes:  characters 07h (BEL), 08h (BS), 0Ah (LF), and 0Dh (CR) are interpreted
          and do the expected things
        IBM PC ROMs dated 4/24/81 and 10/19/81 require that BH be the same as
          the current active page
BUG:    if the write causes the screen to scroll, BP is destroyed by BIOSes
          for which AH=06h destroys BP
SeeAlso: AH=02h,AH=06h,AH=0Ah
--------b-100E--CXABCD-----------------------
INT 10 - V20-XT-BIOS - TELETYPE OUTPUT WITH ATTRIBUTE
        AH = 0Eh
        CX = ABCDh
        BP = ABCDh
        AL = character to write
        BH = page number
        BL = foreground color (text modes as well as graphics modes)
Return: nothing
Program: V20-XT-BIOS is a ROM BIOS replacement with extensions by Peter
          Koehlmann / c't magazine
Desc:   display a character on the screen, advancing the cursor and scrolling
          the screen as necessary
Notes:  characters 07h (BEL), 08h (BS), 0Ah (LF), and 0Dh (CR) are interpreted
          and do the expected things
SeeAlso: INT 15/AH=84h"V20-XT-BIOS"
--------V-100F-------------------------------
INT 10 - VIDEO - GET CURRENT VIDEO MODE
        AH = 0Fh
Return: AH = number of character columns
        AL = display mode (see #00010 at AH=00h)
        BH = active page (see AH=05h)
Notes:  if mode was set with bit 7 set ("no blanking"), the returned mode will
          also have bit 7 set
        EGA, VGA, and UltraVision return either AL=03h (color) or AL=07h
          (monochrome) in all extended-row text modes
        HP 200LX returns AL=07h (monochrome) if mode was set to AL=21h
          and always 80 resp. 40 columns in all text modes regardless of
          current zoom setting (see AH=D0h)
        when using a Hercules Graphics Card, additional checks are necessary:
            mode 05h: if WORD 0040h:0063h is 03B4h, may be in graphics page 1
                  (as set by DOSSHELL and other Microsoft software)
            mode 06h: if WORD 0040h:0063h is 03B4h, may be in graphics page 0
                  (as set by DOSSHELL and other Microsoft software)
            mode 07h: if BYTE 0040h:0065h bit 1 is set, Hercules card is in
                  graphics mode, with bit 7 indicating the page (mode set by
                  Hercules driver for Borland Turbo C)
        the Tandy 2000 BIOS is only documented as returning AL, not AH or BH
SeeAlso: AH=00h,AH=05h,AX=10F2h,AX=1130h,AX=CD04h,MEM 0040h:004Ah
--------V-100F56BX4756-----------------------
INT 10 - VUIMAGE DISPLAY DRIVER (v2.20 and below)
        AX = 0F56h
        BX = 4756h
        CX = 4944h
        DL = function
            01h installation check
                Return: AX = 5649h
                        BX = 4443h
                        CX = 5647h
                        DH = 01h
            02h get first video mode's parameters
                Return: AX = BIOS mode number
                        BX = width in pixels
                        CX = height in pixels
                        DX = number of colors
            03h get next video mode's parameters
                Return: as for DL=02h
            04h display line???
                ES:DI -> record (see #00016)
                ???
                Return: ???
Program: VUIMAGE is a shareware GIF/TIFF image viewer by Offe Enterprises
Note:   the use of TSR display drivers was discontinued after v2.20
Index:  installation check;VUIMAGE display driver

Format of record for VUIMAGE Function 04h:
Offset  Size    Description     (Table 00016)
 00h    WORD    row number
 02h    WORD    starting column???
 04h    WORD    ending column???
        ???
--------V-100F--SIF123-----------------------
INT 10 - FRIEZE v7.41+ - INSTALLATION CHECK
        AH = 0Fh
        SI = F123h
        DI = 321Fh
Return: AH = number of character columns
        AL = display mode (see #00010 at AH=00h)
        BH = active page (see AH=05h)
        SI = DI = F345h if installed
Notes:  if mode was set with bit 7 set ("no blanking"), the returned mode will
          also have bit 7 set
        EGA, VGA, and UltraVision return either AL=03h (color) or AL=07h
          (monochrome) in all extended-row text modes
SeeAlso: AH=0Fh"VIDEO",AH=4Bh"FRIEZE"
--------V-1010-------------------------------
INT 10 - BIOS Window Extension v1.1 - SET WINDOW COORDINATES
        AH = 10h
        CH,CL = row,column of upper left corner of window
        DH,DL = row,column of lower right corner of window
Return: AL = status
            00h successful
            01h failed
        AH destroyed
Program: BWE is a TSR by John J. Seal published in May 1986 Dr. Dobb's Journal
Note:   when a window has been set, all output via AH=0Eh is restricted to
          the specified window
SeeAlso: AH=11h"Window",AH=12h"Window"
--------V-1010-------------------------------
INT 10 - VIDEO - Eagle PC2 BIOS Rev. C - SET SCROLL SPEED
        AH = 10h
        AL = speed
            00h fast
            01h slow (scrolling only moves characters during vertical retrace)
Return: AH = previous speed
--------V-1010-------------------------------
INT 10 - Tandy 2000 - VIDEO - GET/SET CHARACTER FONTS
        AH = 10h
        AL = control value
            bit 0: set character set instead of reading it
            bit 1: high 128 characters instead of low 128 characters
        ES:BX -> new character set if AL bit 0 set
Return: ES:BX -> current character set if AL bit 0 clear on entry
Notes:  this interrupt is identical to INT 52 on Tandy 2000
        the character set consists of 16 bytes for each of the 128 characters,
          where each of the 16 bytes describes the pixels in one scan line,
          most significant bit leftmost
SeeAlso: AH=00h,AH=0Bh/BH=02h,AH=11h"Tandy 2000",AH=12h"Tandy 2000"
SeeAlso: INT 52"Tandy 2000"
--------V-101000-----------------------------
INT 10 - VIDEO - SET SINGLE PALETTE REGISTER (PCjr,Tandy,EGA,MCGA,VGA)
        AX = 1000h
        BL = palette register number (00h-0Fh)
           = attribute register number (undocumented) (see #00017)
        BH = color or attribute register value
Return: nothing
Notes:  on MCGA, only BX = 0712h is supported
        under UltraVision, the palette locking status (see AX=CD01h)
          determines the outcome
SeeAlso: AX=1002h,AX=1007h,AX=CD01h

(Table 00017)
Values for attribute register number:
 10h    attribute mode control register (should let BIOS control this)
 11h    overscan color register (see also AX=1001h)
 12h    color plane enable register (bits 3-0 enable corresponding
          text attribute bit)
 13h    horizontal PEL panning register
 14h    color select register
--------V-101001-----------------------------
INT 10 - VIDEO - SET BORDER (OVERSCAN) COLOR (PCjr,Tandy,EGA,VGA)
        AX = 1001h
        BH = border color (00h-3Fh)
Return: nothing
BUG:    the original IBM VGA BIOS incorrectly updates the parameter save area
          and places the border color at offset 11h of the palette table
          rather than offset 10h
Note:   under UltraVision, the palette locking status (see AX=CD01h)
          determines the outcome
SeeAlso: AX=1002h,AX=1008h,AX=CD01h
--------V-101002-----------------------------
INT 10 - VIDEO - SET ALL PALETTE REGISTERS (PCjr,Tandy,EGA,VGA)
        AX = 1002h
        ES:DX -> palette register list (see #00018)
        BH = 00h to avoid problems on some adapters
Return: nothing
Note:   under UltraVision, the palette locking status (see AX=CD01h)
          determines the outcome
SeeAlso: AX=1000h,AX=1001h,AX=1009h,AX=CD01h

Format of palette register list:
Offset  Size    Description     (Table 00018)
 00h 16 BYTEs   colors for palette registers 00h through 0Fh
 10h    BYTE    border color
SeeAlso: #00461
--------V-101003-----------------------------
INT 10 - VIDEO - TOGGLE INTENSITY/BLINKING BIT (Jr, PS, TANDY 1000, EGA, VGA)
        AX = 1003h
        BL = new state
            00h background intensity enabled
            01h blink enabled
        BH = 00h to avoid problems on some adapters
Return: nothing
Notes:  although there is no function to get the current status on adapters
          prior to the VGA, bit 5 of 0040h:0065h indicates the state; on the
          VGA, use AH=1Bh and check offset 2Dh of the returned data (see #00040)
        when configured for a monochrome display, the Boca Research Multi-EGA
          with ROM v M1.1 Type D has its screen disrupted if BH is not clear
        this call is reported to be "Get Cursor Position" on the Tandy
          1000SL/TL
SeeAlso: AH=08h,AH=1Bh
--------V-101007-----------------------------
INT 10 - VIDEO - GET INDIVIDUAL PALETTE REGISTER (VGA,UltraVision v2+)
        AX = 1007h
        BL = palette or attribute (undoc) register number (see #00017)
Return: BH = palette or attribute register value
Note:   UltraVision v2+ supports this function even on color EGA systems in
          video modes 00h-03h, 10h, and 12h; direct programming of the palette
          registers will cause incorrect results because the EGA registers are
          write-only.  To guard against older versions or unsupported video
          modes, programs which expect to use this function on EGA systems
          should set BH to FFh on entry.
SeeAlso: AX=1000h,AX=1009h
--------V-101008-----------------------------
INT 10 - VIDEO - READ OVERSCAN (BORDER COLOR) REGISTER (VGA,UltraVision v2+)
        AX = 1008h
Return: BH = border color (00h-3Fh)
Note:   (see AX=1007h)
SeeAlso: AX=1001h
--------V-101009-----------------------------
INT 10 - VIDEO - READ ALL PALETTE REGISTERS AND OVERSCAN REGISTER (VGA)
        AX = 1009h
        ES:DX -> 17-byte buffer for palette register list (see #00018)
Return: nothing
Note:   UltraVision v2+ supports this function even on color EGA systems in
          video modes 00h-03h, 10h, and 12h; direct programming of the palette
          registers will cause incorrect results because the EGA registers are
          write-only.  To guard against older versions or unsupported video
          modes, programs which expect to use this function on EGA systems
          should set the ES:DX buffer to FFh before calling.
SeeAlso: AX=1002h,AX=1007h,AX=CD02h
--------V-101010-----------------------------
INT 10 - VIDEO - SET INDIVIDUAL DAC REGISTER (VGA/MCGA)
        AX = 1010h
        BX = register number
        CH = new value for green (0-63)
        CL = new value for blue (0-63)
        DH = new value for red (0-63)
Return: nothing
SeeAlso: AX=1012h,AX=1015h
--------V-101012-----------------------------
INT 10 - VIDEO - SET BLOCK OF DAC REGISTERS (VGA/MCGA)
        AX = 1012h
        BX = starting color register
        CX = number of registers to set
        ES:DX -> table of 3*CX bytes where each 3 byte group represents one
                 byte each of red, green and blue (0-63)
Return: nothing
SeeAlso: AX=1010h,AX=1017h,INT 62/AX=00A5h
--------V-101013-----------------------------
INT 10 - VIDEO - SELECT VIDEO DAC COLOR PAGE (VGA)
        AX = 1013h
        BL = subfunction
            00h select paging mode
                BH = 00h select 4 blocks of 64
                BH = 01h select 16 blocks of 16
            01h select page
                BH = page number (00h to 03h) or (00h to 0Fh)
Return: nothing
Note:   this function is not valid in mode 13h
SeeAlso: AX=101Ah
--------V-101015-----------------------------
INT 10 - VIDEO - READ INDIVIDUAL DAC REGISTER (VGA/MCGA)
        AX = 1015h
        BL = palette register number
Return: DH = red value
        CH = green value
        CL = blue value
        AX destroyed by some BIOSes
              (e.g. Tseng ET4000 BIOS v8.00n always returns AX=00C9h)
SeeAlso: AX=1010h,AX=1017h
--------V-101017-----------------------------
INT 10 - VIDEO - READ BLOCK OF DAC REGISTERS (VGA/MCGA)
        AX = 1017h
        BX = starting palette register
        CX = number of palette registers to read
        ES:DX -> buffer (3 * CX bytes in size) (see also AX=1012h)
Return: buffer filled with CX red, green and blue triples
SeeAlso: AX=1012h,AX=1015h,INT 62/AX=00A4h
--------V-101018-----------------------------
INT 10 U - VIDEO - SET PEL MASK (VGA/MCGA)
        AX = 1018h
        BL = new PEL value
Return: nothing
SeeAlso: AX=1019h
--------V-101019-----------------------------
INT 10 U - VIDEO - READ PEL MASK (VGA/MCGA)
        AX = 1019h
Return: BL = value read
SeeAlso: AX=1018h
--------V-10101A-----------------------------
INT 10 - VIDEO - GET VIDEO DAC COLOR-PAGE STATE (VGA)
        AX = 101Ah
Return: BL = paging mode
            00h four pages of 64
            01h sixteen pages of 16
        BH = current page
SeeAlso: AX=1013h
--------V-10101B-----------------------------
INT 10 - VIDEO - PERFORM GRAY-SCALE SUMMING (VGA/MCGA)
        AX = 101Bh
        BX = starting palette register
        CX = number of registers to convert
Return: nothing
Desc:   convert the RGB values of one or more palette registers such that the
          resulting values are grays with the same intensities as the original
          colors
SeeAlso: AH=12h/BL=33h
--------V-1010E0-----------------------------
INT 10 - VIDEO - Diamond Speedstar 24 - SET 24-BIT GRAPHICS MODE
        AX = 10E0h
        BL = video mode (see also #00010 at AH=00h)
            2Eh = 640x480
Return: ???
SeeAlso: AH=00h,AX=10F0h
--------V-1010F0-----------------------------
INT 10 - VIDEO - Tseng ET-4000 BIOS - SET HiColor GRAPHICS MODE
        AX = 10F0h
        BL = video mode (see also #00010 at AH=00h)
            13h = 320x200x32K
            2Dh = 640x350x32K
            2Eh = 640x480x32K
            2Fh = 640x400x32K
            30h = 800x600x32K
            3Eh = 640x480x16M (Genoa 7900)
            FFh Tseng 24-bit color mode
                BH = mode
                    2Dh = 640x480
                    2Eh = 640x480x16M
                    2Fh = 640x400
                    30h = 800x600
                    38h = 1024x768??? (Tseng ET4000/W32i)
Return: AL = 10h if supported
        AH = status
            00h if successful
            other on error
Desc:   switch the display into a graphics mode with 15 or more bits per pixel
Note:   the Tseng HiColor BIOS extensions are supported by:
          Diamond Computer Systems      SpeedStar HiColor VGA
          Everex Systems                HC VGA
          Focus Information Systems     2theMax 4000
          Cardinal Technologies         VGA732
          Orchid ProDesigner IIs        Genoa 7900
SeeAlso: AH=00h,AX=10E0h,AX=10F1h,AX=10F2h
Index:  video modes;Tseng Hi-Color
--------V-1010F1-----------------------------
INT 10 - VIDEO - Tseng ET-4000 BIOS - GET DAC TYPE
        AX = 10F1h
Return: AL = 10h if supported
        BL = type of digital/analog converter (see #00019)
Desc:   determine which type of digital-to-analog converter is installed on the
          display board
SeeAlso: AX=10F0h,AX=10F2h

(Table 00019)
Values for type of DAC:
 00h normal VGA DAC
 01h Sierra SC1148x HiColor DAC
 ---Diamond SpeedStar 24---
 02h new Sierra SS24 DAC (24-bit)
 ---generic Tseng BIOS v8+ ---
 02h Sierra Mark2 (15-bit) or Mark3 (15/16-bit) DAC
 03h ATT20c490/1/2 (15/16/24-bit)
 04h AcuMos ADAC1 (15/16/24-bit)
 05h unknown 15/16/24-bit DAC
 06h Cirrus Internal 15/16/24-bit (CL-GD54xx series adapters)
 07h Diamond SS2410 (15/24-bit)
 08h unknown 15/16/24-bit DAC
 09h unknown 15/16/24-bit DAC
 else other HiColor DAC
--------V-1010F2-----------------------------
INT 10 u - VIDEO - Tseng ET-4000 BIOS - CHECK IF HiColor MODE/SET HiColor MODE
        AX = 10F2h
        BL = function
            00h get current HiColor mode
            01h set 15-bit HiColor mode
            02h set 16-bit HiColor mode
Return: AX = 0010h if supported
            BL = video mode type
                00h not in HiColor mode
                01h 15-bit RGB mode
                02h 16-bit RGB mode
                03h 24-bit RGB mode
Desc:   determine whether the display is in a graphics mode with 15 or more
          bits per pixel color resolution
Note:   set (BL=01h/02h) only works if already in a HiColor mode
SeeAlso: AH=0Fh,AX=10F0h,AX=10F1h
--------V-1011-------------------------------
INT 10 - BIOS Window Extension v1.1 - GET WINDOW COORDINATES
        AH = 11h
Return: CH,CL = row,column of upper left corner
        DH,DL = row,column of lower right corner
Desc:   determine the portion of the display to which output is restricted
Program: BWE is a TSR by John J. Seal published in May 1986 Dr. Dobb's Journal
SeeAlso: AH=10h"Window",AH=12h"Window"
--------V-1011-------------------------------
INT 10 - Tandy 2000 - VIDEO - WRITE ATTRIBUTE ONLY
        AH = 11h
        BL = new character attribute (text modes) or color (graphics)
        CX = number of times to write attribute
Return: nothing
Note:   this interrupt is identical to INT 52 on Tandy 2000
SeeAlso: AH=0Ah,AH=0Bh/BH=02h,AH=11h"Tandy 2000",AH=12h"Tandy 2000"
SeeAlso: INT 52"Tandy 2000"
--------V-101100-----------------------------
INT 10 - VIDEO - TEXT-MODE CHARGEN - LOAD USER-SPECIFIED PATTERNS (PS,EGA,VGA)
        AX = 1100h
        ES:BP -> user table
        CX = count of patterns to store
        DX = character offset into map 2 block
        BL = block to load in map 2
        BH = number of bytes per character pattern
Return: nothing
Notes:  This function will cause a mode set, completely resetting
          the video environment, but without clearing the video buffer
        the current block specifiers may be determined with INT 10/AH=1Bh,
          looking at offsets 2Bh and 2Ch of the returned data (VGA only)
          (see AH=1Bh,#00040)
SeeAlso: AX=1101h,AX=1102h,AX=1103h,AX=1104h,AX=1110h,AH=1Bh,AX=CD10h
SeeAlso: MEM 0040h:0084h
Index:  text mode;font|text mode;screen rows
--------V-101101-----------------------------
INT 10 - VIDEO - TEXT-MODE CHARGEN - LOAD ROM MONOCHROME PATTERNS (PS,EGA,VGA)
        AX = 1101h
        BL = block to load
Return: nothing
Notes:  (see also AX=1100h)
        This function will cause a mode set, completely resetting
          the video environment, but without clearing the video buffer
        the "monochrome" patters are 8x14 pixels in size
SeeAlso: AX=1100h,AX=1102h,AX=1103h,AX=1104h,AX=1111h,AH=1Bh,AX=CD10h
SeeAlso: MEM 0040h:0084h
Index:  text mode;font|text mode;screen rows
--------V-101102-----------------------------
INT 10 - VIDEO - TEXT-MODE CHARGEN - LOAD ROM 8x8 DBL-DOT PATTERNS (PS,EGA,VGA)
        AX = 1102h
        BL = block to load
Return: nothing
Notes:  (see AX=1100h)
SeeAlso: AX=1100h,AX=1101h,AX=1103h,AX=1104h,AX=1112h,AH=1Bh,AX=CD10h
SeeAlso: MEM 0040h:0084h
--------V-101103-----------------------------
INT 10 - VIDEO - TEXT-MODE CHARGEN - SET BLOCK SPECIFIER (PS,EGA,VGA)
        AX = 1103h
        BL = block specifier (see #00020)
Return: nothing
Notes:  (see also AX=1110h)
        This function allows dual character sets to appear on screen
          simultaneously
SeeAlso: AX=1100h,AX=1101h,AX=1102h,AX=1104h,AH=1Bh,AX=CD10h
SeeAlso: MEM 0040h:0084h
Index:  text mode;font|text mode;screen rows

Bitfields for block specifier:
Bit(s)  Description     (Table 00020)
---EGA/MCGA---
 0,1    block selected by characters with attribute bit 3 clear
 2,3    block selected by characters with attribute bit 3 set
---VGA---
 0,1,4  block selected by characters with attribute bit 3 clear
 2,3,5  block selected by characters with attribute bit 3 set
--------V-101104-----------------------------
INT 10 - VIDEO - TEXT-MODE CHARGEN - LOAD ROM 8x16 CHARACTER SET (VGA)
        AX = 1104h
        BL = block to load
Return: nothing
Notes:  (see AX=1100h)
SeeAlso: AX=1100h,AX=1101h,AX=1102h,AX=1103h,AX=1114h,AH=1Bh,AX=CD10h
SeeAlso: MEM 0040h:0084h
Index:  text mode;font|text mode;screen rows
--------V-1011-------------------------------
INT 10 - VIDEO - Realtek RTVGA - TEXT-MODE CHARACTER GENERATOR FUNCTIONS
        AH = 11h
        AL = 07h load user-specified patterns and recalculate mode parms
                 parameters are the same as for AX=1110h
        AL = 08h load monochrome patterns (8x14) and recalculate mode parms
                 parameters are the same as for AX=1111h
        AL = 09h load ROM 8 by 8 double-dot patterns and recalculate mode parms
                 parameters are the same as for AX=1112h
        AL = 0Bh load ROM 8x16 character set (VGA) and recalculate mode parms
                 parameters are the same as for AX=1114h
Note:   these functions should only be called under the same conditions as
          AL=1xh (see AX=1110h"EGA")
SeeAlso: AX=1100h,AX=1110h"CHARGEN",AX=1110h"Realtek",MEM 0040h:0084h
Index:  text mode;font|text mode;screen rows
--------V-10110F-----------------------------
INT 10 - VIDEO - Realtek RTVGA - SET USER 8x8 GRAPHICS CHARACTERS
        AX = 110Fh
        ES:BP -> user table for INT 1F
Return: nothing
Note:   this function is meant to be called immediately after a mode set;
          results are unpredictable at other times
SeeAlso: AX=1110h"Realtek",AX=1111h"Realtek",AX=1112h"Realtek",AX=1120h
--------V-101110-----------------------------
INT 10 - VIDEO - TEXT-MODE CHARGEN - LOAD USER-SPECIFIED PATTERNS (PS,EGA,VGA)
        AX = 1110h
        ES:BP -> user table
        CX = count of patterns to store
        DX = character offset into map 2 block
        BL = block to load in map 2
        BH = number of bytes per character pattern
Return: nothing
Notes:  This function will cause a mode set, completely resetting
          the video environment, but without clearing the video buffer
        This function is designed to be called immediately after a mode set,
          it is equivalent to AX=110xh except that:
              Page 0 must be active.
              Bytes/character is recalculated.
              Max character rows is recalculated.
              CRT buffer length is recalculated.
              CRTC registers are reprogrammed as follows:
                     R09 = bytes/char-1 ; max scan line (mode 7 only)
                     R0A = bytes/char-2 ; cursor start
                     R0B = 0            ; cursor end
                     R12 = ((rows+1)*(bytes/char))-1 ; vertical display end
                     R14 = bytes/char   ; underline loc
                           (*** BUG: should be 1 less ***)
        the current block specifiers may be determined with INT 10/AH=1Bh,
          looking at offsets 2Bh and 2Ch of the returned data (VGA only)
          (see AH=1Bh,#00040)
SeeAlso: AX=1100h,AX=1111h,AX=1112h,AX=1114h,AH=1Bh,AX=CD10h,MEM 0040h:0084h
Index:  text mode;font|text mode;screen rows
--------V-101110-----------------------------
INT 10 - VIDEO - Realtek RTVGA - SET USER GRAPHICS CHARACTERS
        AX = 1110h
        ES:BP -> user table
        CX = bytes per character
        BL = row specifier
            00h user set
                DL = number of rows
            01h 14 rows
            02h 25 rows
            03h 43 rows
Return: nothing
Note:   this function is meant to be called immediately after a mode set;
          results are unpredictable at other times
SeeAlso: AX=110Fh"Realtek",AX=1112h"Realtek",AX=1121h
--------V-101111-----------------------------
INT 10 - VIDEO - TEXT-MODE CHARGEN - LOAD ROM MONOCHROME PATTERNS (PS,EGA,VGA)
        AX = 1111h
        BL = block to load
Return: nothing
Notes:  (see AX=1110h)
        the "monochrome" patters are 8x14 pixels in size
SeeAlso: AX=1101h,AX=1110h,AX=1112h,AX=1114h,AH=1Bh,AX=CD10h
--------V-101111-----------------------------
INT 10 - VIDEO - Realtek RTVGA - SET ROM 8x14 GRAPHICS CHARACTERS
        AX = 1111h
        BL = row specifier (see AX=1121h)
Return: nothing
Note:   this function is meant to be called immediately after a mode set;
          results are unpredictable at other times
SeeAlso: AX=110Fh"Realtek",AX=1110h"Realtek",AX=1122h
--------V-101112-----------------------------
INT 10 - VIDEO - TEXT-MODE CHARGEN - LOAD ROM 8x8 DBL-DOT PATTERNS (PS,EGA,VGA)
        AX = 1112h
        BL = block to load
Return: nothing
Notes:  (see AX=1110h)
SeeAlso: AX=1103h,AX=1110h,AX=1111h,AX=1114h,AH=1Bh,AX=CD10h
--------V-101112-----------------------------
INT 10 - VIDEO - Realtek RTVGA - SET ROM 8x8 DOUBLE-DOT CHARACTERS
        AX = 1112h
        BL = row specifier (see AX=1121h)
Return: nothing
Note:   this function is meant to be called immediately after a mode set;
          results are unpredictable at other times
SeeAlso: AX=110Fh"Realtek",AX=1110h"Realtek",AX=1111h"Realtek",AX=1123h
--------V-101114-----------------------------
INT 10 - VIDEO - TEXT-MODE CHARGEN - LOAD ROM 8x16 CHARACTER SET (VGA)
        AX = 1114h
        BL = block to load
Return: nothing
Notes:  (see AX=1110h)
SeeAlso: AX=1104h,AX=1110h,AX=1111h,AX=1112h,AH=1Bh,AX=CD10h
--------V-101118-----------------------------
INT 10 - IBM SurePath BIOS - Officially "Private" Function
        AX = 1118h
--------V-101120-----------------------------
INT 10 - VIDEO - GRAPH-MODE CHARGEN - SET USER 8x8 GRAPHICS CHARS (PS,EGA,VGA)
        AX = 1120h
        ES:BP -> user table for INT 1F
Return: nothing
Note:   this function is meant to be called immediately after a mode set;
          results are unpredictable at other times
SeeAlso: AX=1121h,AX=1122h,AX=1123h,AX=1124h,AX=1129h,INT 1F"SYSTEM DATA"
SeeAlso: INT 43"VIDEO DATA"
--------V-101121-----------------------------
INT 10 - VIDEO - GRAPH-MODE CHARGEN - SET USER GRAPHICS CHARACTERS (PS,EGA,VGA)
        AX = 1121h
        ES:BP -> user table
        CX = bytes per character
        BL = row specifier
            00h user set
                DL = number of rows
            01h 14 rows
            02h 25 rows
            03h 43 rows
Return: AL = new number of rows (Diamond Stealth64 Video)
Note:   this function is meant to be called immediately after a mode set;
          results are unpredictable at other times
SeeAlso: AX=1120h,AX=1122h,AX=1123h,AX=1124h,AX=1129h"Compaq"
SeeAlso: AX=1129h"Diamond",INT 1F"SYSTEM DATA",INT 43"VIDEO DATA"
--------V-101122-----------------------------
INT 10 - VIDEO - GRAPH-MODE CHARGEN - SET ROM 8x14 GRAPHICS CHARS (PS,EGA,VGA)
        AX = 1122h
        BL = row specifier (see AX=1121h)
Return: nothing
Notes:  this function is meant to be called immediately after a mode set;
          results are unpredictable at other times
        UltraVision v2+ sets INT 43 to the appropriate font on this call
SeeAlso: AX=1111h,AX=1120h,AX=1121h,AX=1123h,AX=1124h,AX=1129h
SeeAlso: INT 1F"SYSTEM DATA",INT 43"VIDEO DATA"
--------V-101123-----------------------------
INT 10 - VIDEO - GRAPH-MODE CHARGEN - SET ROM 8x8 DOUBLE-DOT CHARS (PS,EGA,VGA)
        AX = 1123h
        BL = row specifier (see AX=1121h)
Return: nothing
Notes:  this function is meant to be called immediately after a mode set;
          results are unpredictable at other times
        UltraVision v2+ sets INT 43 to the appropriate font on this call
SeeAlso: AX=1112h,AX=1120h,AX=1121h,AX=1122h,AX=1124h,AX=1129h
SeeAlso: INT 1F"SYSTEM DATA",INT 43"VIDEO DATA"
--------V-101124-----------------------------
INT 10 - VIDEO - GRAPH-MODE CHARGEN - LOAD 8x16 GRAPHICS CHARS (VGA,MCGA)
        AX = 1124h
        BL = row specifier (see AX=1121h)
Return: nothing
Notes:  this function is meant to be called immediately after a mode set;
          results are unpredictable at other times
        UltraVision v2+ sets INT 43 to the appropriate font on this call
SeeAlso: AX=1120h,AX=1121h,AX=1122h,AX=1123h,AX=1129h
SeeAlso: INT 1F"SYSTEM DATA",INT 43"VIDEO DATA"
--------V-101129-----------------------------
INT 10 - VIDEO - GRAPH-MODE CHARGEN - LOAD 8x16 GRAPH CHARS (Compaq Systempro)
        AX = 1129h
        BL = row specifier (see AX=1121h)
Return: nothing
Notes:  this function is meant to be called immediately after a mode set;
          results are unpredictable at other times
        UltraVision v2+ sets INT 43 to the appropriate font on this call
SeeAlso: AX=1120h,AX=1121h,AX=1122h,AX=1123h,AX=1124h,INT 1F"SYSTEM DATA"
SeeAlso: INT 43"VIDEO DATA"
--------V-101129-----------------------------
INT 10 - VIDEO - GRAPH-MODE CHARGEN - SET USER GRAPHICS CHARACTERS (Diamond)
        AX = 1129h
        DI:BP -> user table
        CX = bytes per character
        BL = row specifier
            00h user set
                DL = number of rows
            01h 14 rows
            02h 25 rows
            03h 43 rows
Return: AL = new number of rows
Notes:  this function is meant to be called immediately after a mode set;
          results are unpredictable at other times
        supported by Diamond Stealth64 Video
SeeAlso: AX=1120h,AX=1122h,AX=1123h,AX=1124h,INT 1F"SYSTEM",INT 43"VIDEO"
--------V-101130-----------------------------
INT 10 - VIDEO - GET FONT INFORMATION (EGA, MCGA, VGA)
        AX = 1130h
        BH = pointer specifier
            00h INT 1Fh pointer
            01h INT 43h pointer
            02h ROM 8x14 character font pointer
            03h ROM 8x8 double dot font pointer
            04h ROM 8x8 double dot font (high 128 characters)
            05h ROM alpha alternate (9 by 14) pointer (EGA,VGA)
            06h ROM 8x16 font (MCGA, VGA)
            07h ROM alternate 9x16 font (VGA only) (see #00021)
            11h (UltraVision v2+) 8x20 font (VGA) or 8x19 font (autosync EGA)
            12h (UltraVision v2+) 8x10 font (VGA) or 8x11 font (autosync EGA)
Return: ES:BP = specified pointer
        CX    = bytes/character of on-screen font (not the requested font!)
        DL    = highest character row on screen
Note:   for UltraVision v2+, the 9xN alternate fonts follow the corresponding
          8xN font at ES:BP+256N
BUG:    the IBM EGA and some other EGA cards return in DL the number of rows on
          screen rather than the highest row number (which is one less).
SeeAlso: AX=1100h,AX=1103h,AX=1120h,INT 1F"SYSTEM DATA",INT 43"VIDEO DATA"

Format of alternate font table [array]:
Offset  Size    Description     (Table 00021)
 00h    BYTE    character to be replaced (00h = end of table)
 01h  N BYTEs   graphics data for character, one byte per scan line
--------V-101130BX4D4F-----------------------
INT 10 - M10_SCR.COM v3.5+ - INSTALLATION CHECK
        AX = 1130h
        BX = 4D4Fh
Return: CX = 4F4Dh if installed
            ES:BP -> M10_SCR INT 10 handler
Program: M10_SCR is a shareware extended text mode and font driver by
          I.V. Morozov
SeeAlso: INT 16/AX=4D4Fh
--------V-1012-------------------------------
INT 10 - BIOS Window Extension v1.1 - GET BLANKING ATTRIBUTE
        AH = 12h
Return: BH = attribute to use on blanked lines when scrolling
Program: BWE is a TSR by John J. Seal published in May 1986 Dr. Dobb's Journal
SeeAlso: AH=11h"Window",AH=12h"Window"
--------V-1012-------------------------------
INT 10 - Tandy 2000 - VIDEO - SCROLL WINDOW
        AH = 12h
        AL = number of rows or columns to scroll
        BH = buffer flag
            00h data in user buffer
                ES:SI -> buffer containing character/attribute pairs
            01h no buffer, fill emptied rows/columns with blanks
        BL = direction in which to scroll
            00h up
            01h down
            02h left
            03h right
        CH,CL = row,column of upper left corner of scroll area
        DH,DL = row,column of lower right corner
Return: nothing
Notes:  this interrupt is identical to INT 52 on Tandy 2000
        the user buffer, if supplied, must be organized by row; regardless of
          the scroll direction, all character/attribute pairs for the first
          row are first, then the pairs for the second row, etc.
SeeAlso: AH=00h,AH=0Bh/BH=02h,AH=11h"Tandy 2000",AH=12h"Tandy 2000"
SeeAlso: INT 52"Tandy"
--------V-1012--BL10-------------------------
INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (PS, EGA, VGA, MCGA) - GET EGA INFO
        AH = 12h
        BL = 10h
Return: BH = video state
            00h color mode in effect (I/O port 3Dxh)
            01h mono mode in effect (I/O port 3Bxh)
        BL = installed memory (00h = 64K, 01h = 128K, 02h = 192K, 03h = 256K)
        CH = feature connector bits (see #00022)
        CL = switch settings (see #00023,#00024)
        AH destroyed (at least by Tseng ET4000 BIOS v8.00n)
Note:   one possible check for the presence of an EGA or later display card
          is to call this function with BH=FFh; if not present, BH will be
          unchanged on return
        another installation check is used by Athena Digital's HGCIBM, which
          sets CX to FFFFh on calling and checks whether it has been changed
          on return
Index:  installation check;EGA

Bitfields for feature connector bits:
Bit(s)  Description     (Table 00022)
 0      FEAT 1 line, state 2
 1      FEAT 0 line, state 2
 2      FEAT 1 line, state 1
 3      FEAT 0 line, state 1
 4-7    unused (0)

Bitfields for switch settings:
Bit(s)  Description     (Table 00023)
 0      switch 1 OFF
 1      switch 2 OFF
 2      switch 3 OFF
 3      switch 4 OFF
 4-7    unused

(Table 00024)
Values for switch settings on original EGA/VGA:
 00h            primary MDA/HGC,        secondary EGA+ 40x25
 01h-03h        primary MDA/HGC,        secondary EGA+ 80x25
 04h            primary CGA 40x25,      secondary EGA+ 80x25 mono
 05h            primary CGA 80x25,      secondary EGA+ 80x25 mono
 06h            primary EGA+ 40x25,     secondary MDA/HGC (optional)
 07h-09h        primary EGA+ 80x25,     secondary MDA/HGC (optional)
 0Ah            primary EGA+ 80x25 mono,secondary CGA 40x25 (optional)
 0Bh            primary EGA+ 80x25 mono,secondary CGA 80x25 (optional)
--------V-1012--BL11-------------------------
INT 10 - VIDEO - Trident TVGA 8800/8900/9000 BIOS - GET BIOS INFO
        AH = 12h
        BL = 11h
Return: AL = 12h if function supported
            BL = ??? (10h)
            ES:BP -> BIOS info structure (see #00025)
SeeAlso: AH=12h/BL=12h"TRIDENT"

Format of Trident BIOS Info structure:
Offset  Size     Description    (Table 00025)
 00h    BYTE     ??? (0000h)
 01h    BYTE     OEM Code (00h for original Trident)
 02h    WORD     ID??? (1073h for 8800BR, 1074 for 8800CS)
 04h  8 BYTEs    BIOS date ('mm/dd/yy')
 0Ch    WORD     ???
 0Eh  8 BYTEs    BIOS Version (' C3-128 ', ' C3-129 ')
--------V-1012--BL12-------------------------
INT 10 - VIDEO - Trident TVGA 8800/8900/9000 BIOS - GET VIDEO RAM SIZE
        AH = 12h
        BL = 12h
Return: AL = 12h if function supported
            AH = number of 256K banks of RAM installed
                  (read from CRTC register 1Fh)
SeeAlso: AH=12h/BL=11h"TRIDENT"
--------V-1012--BL20-------------------------
INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (PS,EGA,VGA,MCGA) - ALTERNATE PRTSC
        AH = 12h
        BL = 20h  select alternate print screen routine
Return: nothing
Desc:   installs a PrtSc routine from the video card's BIOS to replace the
          default PrtSc handler from the ROM BIOS, which usually does not
          understand screen heights other than 25 lines
Note:   some adapters disable print-screen instead of enhancing it
SeeAlso: INT 05"PRINT SCREEN"
--------V-1012--BL2E-------------------------
INT 10 - Tseng ET-4000 BIOS v3.00 and v8.00 - BUG
        AH = 12h
        BL = 2Eh
Return: nothing
Note:   due to an omitted end-of-list marker, these versions of the BIOS will
          crash the system on this function
--------V-1012--BL30-------------------------
INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (VGA) - SELECT VERTICAL RESOLUTION
        AH = 12h
        BL = 30h
        AL = vertical resolution
             00h 200 scan lines
             01h 350 scan lines
             02h 400 scan lines
Return: AL = 12h if function supported
Desc:   specify the number of scan lines used to display text modes
Note:   the specified resolution will take effect on the next mode set
SeeAlso: AH=00h
--------V-1012--BL31-------------------------
INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (VGA, MCGA) - PALETTE LOADING
        AH = 12h
        BL = 31h
        AL = new state
            00h enable default palette loading
            01h disable default palette loading
Return: AL = 12h if function supported
Desc:   specify whether a default palette should be loaded when the display
          mode is set
SeeAlso: AH=00h
--------V-1012--BL32-------------------------
INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (VGA, MCGA) - VIDEO ADDRESSING
        AH = 12h
        BL = 32h
        AL = new state
            00h enable video addressing
            01h disable video addressing
Return: AL = 12h if function supported
Desc:   specify whether the CPU should have access to video memory and the
          display adapters I/O registers
--------V-1012--BL33-------------------------
INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (VGA, MCGA) - GRAY-SCALE SUMMING
        AH = 12h
        BL = 33h
        AL = new state
            00h enable gray scale summing
            01h disable gray scale summing
Return: AL = 12h if function supported
Desc:   specify whether or not colors should be converted to gray scale when
          palette or color registers are loaded
SeeAlso: AX=101Bh,AX=BF06h,AX=BF08h
--------V-1012--BL34-------------------------
INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (VGA) - CURSOR EMULATION
        AH = 12h
        BL = 34h
        AL = new state
            00h enable alphanumeric cursor emulation
            01h disable alphanumeric cursor emulation
Return: AL = 12h if function supported
Desc:   specify whether the BIOS should automatically remap cursor start/end
          according to the current character height in text modes
SeeAlso: AH=01h,AH=03h
--------V-1012--BL35-------------------------
INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (PS) - DISPLAY-SWITCH INTERFACE
        AH = 12h
        BL = 35h
        AL = subfunction
            00h initial adapter video off
            01h initial planar video on
            02h switch active video off
            03h switch inactive video on
            80h *UNDOCUMENTED* set system board video active flag
        ES:DX -> buffer for 128 byte save area (if AL = 00h-03h)
Return: AL = 12h if function supported
Desc:   switch between two video adapters which may otherwise have address
          conflicts
SeeAlso: AX=BF00h,AX=BF01h,INT 6D"VGA"
--------V-1012--BL36-------------------------
INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (PS, VGA) - VIDEO REFRESH CONTROL
        AH = 12h
        BL = 36h
        AL = new state
            00h enable refresh
            01h disable refresh
Return: AL = 12h if function supported
Desc:   specify whether the contents of video memory should be displayed on
          the screen; disabling refresh effectively blanks the screen
Note:   when display refresh is disabled, the entire screen displays the color
          specified by the DAC color register 00h; thus to actually blank the
          screen, the application must first ensure that that register has been
          set to black
BUG:    GEM/VIEWMAX ET3000 and ET4000 drivers dated 6/23/88 do not correctly
          reenable refresh after the screen has been blanked due to inactivity,
          resulting in a total loss of video synchronization
SeeAlso: AX=BF05h
--------V-1012--BL37-------------------------
INT 10 - VIDEO - XGA - MAINFRAME INTERACTIVE SUPPORT
        AH = 12h
        BL = 37h
        AL = text attribute type (00h normal VGA, 01h mainframe type)
Return: AL = 12h if supported
SeeAlso: #00026,AH=08h,#00042

Bitfields for XGA mainframe type character attributes:
Bit(s)  Description     (Table 00026)
 7      blink double rate (75% ON time) or use color 8 as background
        (see AX=1003h)
 6      reverse video
 5      underlined
 4      left-most and right-most dots of underline area inverted
 3      foreground intensity/character font select
 2-0    foreground color
SeeAlso: #00014,#00036
--------V-1012--BL38-------------------------
INT 10 - IBM SurePath BIOS - Officially "Private" Function
        AH = 12h
        BL = 38h
SeeAlso: AX=1118h,AH=12h/BL=39h
--------V-1012--BL39-------------------------
INT 10 - IBM SurePath BIOS - Officially "Private" Function
        AH = 12h
        BL = 39h
SeeAlso: AX=1118h,AH=12h/BL=38h,AH=12h/BL=3Ah
--------V-1012--BL3A-------------------------
INT 10 - IBM SurePath BIOS - Officially "Private" Function
        AH = 12h
        BL = 3Ah
SeeAlso: AX=1118h,AH=12h/BL=39h
--------V-1012--BL53-------------------------
INT 10 - Tseng ET-4000 BIOS v8.00 (06/07/91) - BUG
        AH = 12h
        BL = 53h
Note:   due to an omitted end-of-list marker, this version of the BIOS will
          crash the system on this function
--------V-1012--BL57-------------------------
INT 10 - Tseng ET-4000 BIOS v8.00 (06/07/91) - BUG
        AH = 12h
        BL = 57h
Note:   due to an omitted end-of-list marker, this version of the BIOS will
          crash the system on this function
--------V-1012--BH55-------------------------
INT 10 - VIDEO - ALTERNATE FUNC SELECT (ATI,Tatung,Taxan) - ENHANCED FEATURES
        AH = 12h
        BH = 55h
        BL = subfunction
            00h disable enhanced features
            01h enable enhanced features
            02h get status
                Return: AL = status flags (see #00027)
            03h disable register trapping (CGA emulation)
            04h enable register trapping
            05h program video mode
                ES:BP -> video mode table (see #00028)
            06h get mode table
                AL = video mode
                Return: ES:BP -> table suitable for mode AL
                                  (and subfunc BL=05h) (see #00028)
                        BP = FFFFh on error
                        SI = 0000h (ATI Mach32)
Note:   the ATI Mouse driver (MOUSE.COM/MOUSE.SYS) uses subfunction 06h to get
          the mode table for mode 03h, and then looks for a signature string
          beginning within 32 bytes of the offset specified by the word at
          ES:000Ch
SeeAlso: AH=FFh"Oak"
Index:  installation check;ATI video adapters

Bitfields for status flags:
Bit(s)  Description     (Table 00027)
 3      set if enhanced features enabled
 7-5    monitor type
        000 PS/2 mono
        001 PS/2 color
        010 multi-sync
        011 Taxan 650 25kHz
        100 RGB
        101 mono
        110 EGA
        111 Compaq internal

Format of ATI VGA Wonder video mode table:
Offset  Size    Description     (Table 00028)
 00h    BYTE    number of columns
 01h    BYTE    maximum row (number of rows - 1)
 02h    BYTE    scan lines per row
 03h    WORD    video buffer size in bytes
 05h  4 BYTEs   values for Sequencer registers 1-4
 09h    BYTE    value for Miscellaneous Output register
 0Ah 25 BYTEs   values for CRTC registers 00h-18h
                00h horizontal total size (chars)
                01h horizontal displayed (chars)
                02h horizontal sync position (chars)
                03h horizontal sync width (chars)
                04h vertical total size (char rows)
                05h vertical total adjust (scan lines)
                06h vertical displayed (char rows)
                07h vertical sync position (char rows)
                08h interlace mode
                09h max scan line in row
                0Ah cursor start scan line
                0Bh cursor end scan line
                0Ch screen memory start (high)
                0Dh screen memory start (low)
                0Eh cursor address (high)
                0Fh cursor address (low)
                10h light pen (high)
                11h light pen (low)
 23h 20 BYTEs   default palette (values for Attribute Controller regs 00h-13h)
 37h  9 BYTEs   values for Graphics Controller registers 00h-08h
--------V-1012--BL74-------------------------
INT 10 - Tseng ET-4000 BIOS v3.00 and v8.00 - BUG
        AH = 12h
        BL = 74h
Note:   due to an omitted end-of-list marker, these versions of the BIOS will
          crash the system on this function
--------V-1012--BL80-------------------------
INT 10 - Tseng ET-4000 BIOS v3.00 and v8.00 - BUG
        AH = 12h
        BL = 80h
Note:   due to an omitted end-of-list marker, these versions of the BIOS will
          crash the system on this function
--------V-1012--BL80-------------------------
INT 10 - Cirrus Logic BIOS - INQUIRE VGA TYPE
        AH = 12h
        BL = 80h
Return: AX = controller type in bits 13-0 (see #00029)
            bit 14: ???
            bit 15: ???
        BL = silicon revision number (bit 7 set if not available)
        BH = ???
            bit 2 set if using CL-GD 6340 LCD interface
SeeAlso: AH=12h/BL=81h,AH=12h/BL=82h,AH=12h/BL=85h,AH=12h/BL=9Ah,AH=12h/BL=A1h

(Table 00029)
Values for Cirrus Logic video controller type:
 0000h  no extended alternate select support
 0001h  reserved
 0002h  CL-GD510/520
 0003h  CL-GD610/620
 0004h  CL-GD5320
 0005h  CL-GD6410
 0006h  CL-GD5410
 0007h  CL-GD6420
 0008h  CL-GD6412
 0010h  CL-GD5401
 0011h  CL-GD5402
 0012h  CL-GD5420
 0013h  CL-GD5422
 0014h  CL-GD5424
 0015h  CL-GD5426
 0016h  CL-GD5420r1
 0017h  CL-GD5402r1
 0018h  CL-GD5428
 0019h  CL-GD5429
 0020h  CL-GD6205/15/25
 0021h  CL-GD6215
 0022h  CL-GD6225
 0023h  CL-GD6235
 0024h  CL-GD6245
 0030h  CL-GD5432
 0031h  CL-GD5434
 0032h  CL-GD5430
 0033h  CL-GD5434 rev. E and F
 0035h  CL-GD5440
 0036h  CL-GD5436
 0039h  CL-GD5446
 0040h  CL-GD6440
 0041h  CL-GD7542 (Nordic)
 0042h  CL-GD7543 (Viking)
 0043h  CL-GD7541 (Nordic Lite)
 0050h  CL-GD5452 (Northstar)
 0052h  CL-GD5452 (Northstar) ???
SeeAlso: #00732,#00743
--------V-1012--BL81-------------------------
INT 10 - Cirrus Logic BIOS - GET BIOS VERSION NUMBER
        AH = 12h
        BL = 81h
Return: AH = BIOS major version
        AL = BIOS minor version
SeeAlso: AH=12h/BL=80h,AH=12h/BL=82h
--------V-1012--BL82-------------------------
INT 10 - Cirrus Logic BIOS - GET DESIGN REVISION CODE
        AH = 12h
        BL = 82h
Return: AL = chip revision
        AH = ??? (AFh for v1.01)
SeeAlso: AH=12h/BL=80h,AH=12h/BL=81h,#00732 at INT 1A/AX=B102h
--------V-1012--BL84-------------------------
INT 10 - Cirrus Logic BIOS v3.02 - INQUIRE OPTIONS
        AH = 12h
        BL = 84h
Return: AX = user options word (see #00030)
SeeAlso: AH=12h/BL=89h,AH=12h/BL=8Ah,AH=12h/BL=8Bh,AH=12h/BL=8Ch,AH=12h/BL=8Fh
SeeAlso: AH=12h/BL=90h,AH=12h/BL=9Ah

Bitfields for Cirrus Logic user options word:
Bit(s)  Description     (Table 00030)
 1,0    centering
        00 vertical centered, 01 from bottom, 10 from top, 11 reserved
 3,2    720-dot fix-up options
        00 OR every 8th and 9th pixel
        01 display MGA mode from left
        10 display MGA mode from right
        11 skip every 9th pixel
 4      ???
 7-5    video mode (001 CGA, 010 MGA, 011 EGA, 100 VGA)
 8      external monitor enabled instead of LCD panel
 9      vertical expand mode enabled
 10     8-bit mode instead of 16-bit mode
 11     normal video rather than reverse video (for LCD)
 12     attribute automap rather than attribute emulation
 13     bold mode disabled (default)
 14     fast bandwidth
 15     ???
--------V-1012--BL85-------------------------
INT 10 - Cirrus Logic BIOS - GET INSTALLED MEMORY
        AH = 12h
        BL = 85h
Return: AL = number of 64K banks of video memory
SeeAlso: AH=12h/BL=80h,AH=12h/BL=93h
--------V-1012--BL89-------------------------
INT 10 - Cirrus Logic BIOS v3.02 - LCD panel - EN/DISABLE REVERSE VIDEO MODE
        AH = 12h
        BL = 89h
        AL = new state (00h enabled, 01h disabled)
Return: nothing
SeeAlso: AH=12h/BL=84h,AH=12h/BL=8Ah,AH=12h/BL=8Bh
--------V-1012--BL8A-------------------------
INT 10 - Cirrus Logic BIOS v3.02 - LCD panel - SET FRAME COLOR
        AH = 12h
        BL = 8Ah
        AL = new gray-scale color (00h = black to 0Fh = white)
Return: nothing
SeeAlso: AH=12h/BL=84h,AH=12h/BL=89h,AH=12h/BL=8Fh
--------V-1012--BL8B-------------------------
INT 10 - Cirrus Logic BIOS v3.02 - LCD panel - ENABLE/DISABLE BOLD MODE
        AH = 12h
        BL = 8Bh
        AL = new state (00h enabled, 01h disabled)
Return: nothing
SeeAlso: AH=12h/BL=84h,AH=12h/BL=89h,AH=12h/BL=8Ch,AH=12h/BL=8Fh
--------V-1012--BL8C-------------------------
INT 10 - Cirrus Logic BIOS v3.02 - LCD panel - SET AUTOMAP/EMULATE ATTRIBUTES
        AH = 12h
        BL = 8Ch
        AL = new state
            00h enable automap
            01h disable automap and emulate attributes
Return: nothing
SeeAlso: AH=12h/BL=84h,AH=12h/BL=8Bh
--------V-1012--BL8F-------------------------
INT 10 - Cirrus Logic BIOS v3.02 - LCD panel - ENABLE/DISABLE EXPAND MODE
        AH = 12h
        BL = 8Fh
        AL = new state (00h enabled, 01h disabled)
Return: nothing
Note:   when expand mode is enabled, the vertical dimension is enlarged to
          full screen
SeeAlso: AH=12h/BL=84h,AH=12h/BL=89h,AH=12h/BL=8Bh,AH=12h/BL=90h
--------V-1012--BL90-------------------------
INT 10 - Cirrus Logic BIOS v3.02 - LCD panel - SET CENTERING MODE
        AH = 12h
        BL = 90h
        AL = new position
            00h centered
            01h from top
            02h from bottom
            03h from top
Return: nothing
SeeAlso: AH=12h/BL=84h,AH=12h/BL=8Fh
--------V-1012--BL91-------------------------
INT 10 - Cirrus Logic BIOS v3.02 - LCD panel - SET 720-DOT FIXUP MODE
        AH = 12h
        BL = 91h
        AL = new mode
            00h display MGA mode from left of screen (default)
            01h display MGA from right
            02h skip every ninth pixel
            03h OR every 8th and 9th pixel
Return: nothing
SeeAlso: AH=12h/BL=84h,AH=12h/BL=8Ah,AH=12h/BL=90h
--------V-1012--BL92-------------------------
INT 10 - Cirrus Logic BIOS v3.02 - LCD panel - SWITCH DISPLAY
        AH = 12h
        BL = 92h
        AL = new display (00h LCD, 01h external monitor)
Return: nothing
Note:   the deselected display is disabled
SeeAlso: AH=12h/BL=84h,AH=12h/BL=89h,AH=12h/BL=90h,AH=12h/BL=94h
--------V-1012--BL93-------------------------
INT 10 - Cirrus Logic BIOS - FORCE 8-BIT OR 16-BIT OPERATION
        AH = 12h
        BL = 93h
        AL = new I/O width (00h = 16 bits, 01h = 8 bits)
Return: nothing
SeeAlso: AH=12h/BL=9Ah
--------V-1012--BL94-------------------------
INT 10 - Cirrus Logic BIOS v3.02 - POWER CONSERVATION
        AH = 12h
        BL = 94h
        AL = new state (00h wake up monitor, 01h shut down display)
Return: nothing
Note:   AL=01h is reported not to work properly on the LCD panel
SeeAlso: AH=12h/BL=84h,AH=12h/BL=92h
--------V-1012--BL9A-------------------------
INT 10 - Cirrus Logic BIOS - GET USER OPTIONS
        AH = 12h
        BL = 9Ah
Return: AX = options word 1 (see #00031)
        CX = options word 2 (see #00032)
        BX,DX reserved
SeeAlso: AH=12h/BL=80h,AH=12h/BL=84h,AH=12h/BL=93h,AH=12h/BL=A0h
SeeAlso: AH=12h/BL=A3h,AH=12h/BL=A4h,#00732 at INT 1A/AX=B102h

Bitfields for Cirrus Logic options word 1:
Bit(s)  Description     (Table 00031)
 0,1    reserved
 2-4    monitor type
 5-6    maximum vertical resolution
 7-9    reserved
 10     force 8-bit operation
 11-13  reserved
 14     vertical refresh frequency at 640x480
        =0 60 Hz
        =1 high refresh
 15     reserved
SeeAlso: AH=12h/BL=AEh

Bitfields for Cirrus Logic options word 2:
Bit(s)  Description     (Table 00032)
 15-13  vertical refresh frequency at 1024x768
 12-11  vertical refresh frequency at 800x600
 10-6   reserved
 5-4    vertical refresh frequency at 1280x1024
 3-0    reserved
SeeAlso: #00033

Bitfields for Cirrus Logic Options word 2 (alternate???):
Bit(s)  Description     (Table 00033)
 15-12  vertical refresh frequency at 1024x768
        0000 43i Hz
        0001 60  Hz
        0010 70  Hz
        0011 72  Hz
        0100 76  Hz
        other reserved
 11-8   vertical refresh frequency at 800x600
        0000 56 Hz
        0001 60 Hz
        0010 72 Hz
        0011 75 Hz
        other reserved
 7-4    maximum vertical resolution
        0000 480  scanlines
        0001 600  scanlines
        0010 768  scanlines
        0011 1024 scanlines
        other reserved
 3-1    vertical refresh frequency at 1280x1024
        000 43i  Hz
        001 60   Hz
        010 71.2 Hz (CL-GD5434 rev. E and F)
        011 74   Hz (CL-GD5434 rev. E and F)
        other reserved
 0      reserved
SeeAlso: #00032
--------V-1012--BLA0-------------------------
INT 10 - Cirrus Logic BIOS - GET VIDEO MODE AVAILABILITY
        AH = 12h
        BL = A0h
        AL = video mode number (00h-7Fh)
Return: AH bit 0: video mode supported
        BX = offset of BIOS subroutine to fixup standard video parameters
                (call subroutine with DS:SI and ES:DI as returned by this call)
        DS:SI -> standard video parameters or FFFFh:FFFFh
        ES:DI -> supplemental video parameters or FFFFh:FFFFh
SeeAlso: AH=00h,AH=12h/BL=9Ah,AH=12h/BL=A1h
--------V-1012--BLA1-------------------------
INT 10 - Cirrus Logic BIOS - READ MONITOR TYPE AND ID FROM 15-PIN CONNECTOR
        AH = 12h
        BL = A1h
Return: BH = monitor ID (see #00034)
        BL = monitor type (00h color, 01h grayscale, 02h no display)
SeeAlso: AH=12h/BL=9Ah,AH=12h/BL=A2h

(Table 00034)
Values for Cirrus Logic monitor ID:
 00h-08h reserved
 09h    IBM 8604/8507 or equivalent
 0Ah    IBM 8514 or equivalent
 0Bh    IBM 8515 or equivalent
 0Dh    IBM 8503 or equivalent
 0Eh    IBM 8512/8513 or equivalent
 0Fh    no monitor
--------V-1012--BLA2-------------------------
INT 10 - Cirrus Logic BIOS - SET MONITOR HORIZONTAL RETRACE FREQUENCY
        AH = 12h
        BL = A2h
        AL = retrace rate
            00h standard VGA (31.5 kHz)
            01h 8514-compatible (31.5 kHz and 35.5 kHz interlaced)
            02h SuperVGA (31.5-35.1 kHz)
            03h extended SuperVGA (31.5-35.5 kHz)
            04h multi-frequency (31.5-37.8 kHz)
            05h extended multi-frequency (31.5-48.0 kHz)
            06h super multi-frequency (31.5-56.0 kHz)
            07h extended super multi-frequency (31.5-64.0 kHz)
Return: nothing
SeeAlso: AH=12h/BL=9Ah,AH=12h/BL=A0h,AH=12h/BL=A4h
--------V-1012--BLA3-------------------------
INT 10 - Cirrus Logic BIOS - SET VGA REFRESH
        AH = 12h
        BL = A3h
        AL = refresh rate for 640x480 (00h normal, 01h high)
Return: nothing
SeeAlso: AH=12h/BL=9Ah,AH=12h/BL=A4h
--------V-1012--BLA4-------------------------
INT 10 - Cirrus Logic BIOS - SET MONITOR TYPE
        AH = 12h
        BL = A4h
        AL = options 1
            bits 7-4 = vertical refresh at 640x480
                (0 = 60Hz, 1 = 72Hz, other reserved)
            bits 3-0 = maximum vertical resolution
                (0 = 480 scanlines, 1 = 600, 2 = 768, 3 = 1024, other reserved)
        BH = options 2
            bits 7-4 = vertical refresh at 1024x768
                (0=87Hz-int, 1=60Hz, 2=70Hz, 3=72Hz, 4=76Hz, other reserved)
            bits 3-0 = vertical refresh at 800x600
                (0 = 56Hz, 1 = 60Hz, 2 = 72Hz, other reserved)
        CH = options 3
            bits 7-4 = vertical refresh at 1280x1024
                (0=87Hz-int, 1=60Hz, 2=70Hz, other reserved)
            bits 3-0: reserved
        CL,DX reserved
Return: nothing
SeeAlso: AH=12h/BL=9Ah,AH=12h/BL=A3h
--------V-1012--BLAE-------------------------
INT 10 - Cirrus Logic BIOS - GET HIGH REFRESH
        AH = 12h
        BL = AEh
Return: AL = result
            bits 7-1: reserved
            bit 0:    640x480 high refresh rate
                      =0 72 Hz
                      =1 75 Hz
SeeAlso: AH=12h/BL=9Ah,AH=12h/BL=A3h,AH=12h/BL=A4h,AH=12h/BL=AFh
--------V-1012--BLAF-------------------------
INT 10 - Cirrus Logic BIOS - SET HIGH REFRESH
        AH = 12h
        BL = AFh
        AL = option
            bits 7-1: reserved
            bit 0:    640x480 high refresh rate
                      =0 72 Hz
                      =1 75 Hz
Return: nothing
SeeAlso: AH=12h/BL=9Ah,AH=12h/BL=A3h,AH=12h/BL=A4h,AH=12h/BL=AEh
--------V-1012--BLBE-------------------------
INT 10 - Tseng ET-4000 BIOS v3.00 and v8.00 - BUG
        AH = 12h
        BL = BEh
Note:   due to an omitted end-of-list marker, these versions of the BIOS will
          crash the system on this function
--------V-1012--BLC6-------------------------
INT 10 - Tseng ET-4000 BIOS v3.00 and v8.00 - BUG
        AH = 12h
        BL = C6h
Note:   due to an omitted end-of-list marker, these versions of the BIOS will
          crash the system on this function
--------V-1012--BLF0-------------------------
INT 10 - Tseng ET-4000 BIOS v3.00 and v8.00 - BUG
        AH = 12h
        BL = F0h
Note:   due to an omitted end-of-list marker, these versions of the BIOS will
          crash the system on this function
--------V-1012--BLF1--------------------------
INT 10 - Tseng ET-4000 BIOS - GET/SET SCREEN REFRESH RATE
        AH = 12h
        BL = F1h
        AL = subfunction
            00h set refresh rate
            01h get refresh rate
        BH = video mode
            00h  640x480
            01h  800x600
            02h  1024x768
            03h  1280x1024
        CX = new refresh rate (see #00035) if AL = 00h
Return: AL = 12h if supported
            CX = current rate (for AL=00h, a changed CX indicates failure)

(Table 00035)
Values for Tseng ET4000 refresh rate:
 CX     640x480 800x600   1024x768/1280x1024
 00h    60 Hz    56 Hz     interlaced
 01h    72 Hz    60 Hz     60 Hz
 02h    75 Hz    72 Hz     70 Hz
 03h    90 Hz    75 Hz     75 Hz
 04h    --       90 Hz     --
--------V-1013-------------------------------
INT 10 - VIDEO - WRITE STRING (AT and later,EGA)
        AH = 13h
        AL = write mode
           bit 0: update cursor after writing
           bit 1: string contains alternating characters and attributes
           bits 2-7: reserved (0)
        BH = page number
        BL = attribute if string contains only characters
        CX = number of characters in string
        DH,DL = row,column at which to start writing
        ES:BP -> string to write
Return: nothing
Notes:  recognizes CR, LF, BS, and bell; for the ET4000 BIOS, scrolling,
          backspace, and CR only take place in the active page
        also available PC or XT with EGA or higher
        HP 95LX only supports write mode 00h
        IBM documents AL=10h,11h,20h,21h as "private" rather than "reserved"
BUG:    on the IBM VGA Adapter, any scrolling which may occur is performed on
          the active page rather than the requested page
SeeAlso: AH=09h,AH=0Ah,AH=13h"DOS/V"
--------J-1013-------------------------------
INT 10 - DOS/V - READ/WRITE DOUBLE-BYTE CHARACTER SET CHARACTERS/ATTRIBUTES
        AH = 13h
        AL = function
            10h read characters and standard attributes
            11h read characters and extended attributes
            12h write characters and standard attributes
            13h write characters and extended attributes
        BH = 00h
        CX = number of characters to transfer
        DH,DL = row,column at which to start transfer
        ES:BP -> buffer for/containing characters and attributes (see #00036)
Return: ES:BP buffer filled if reading
Program: DOS/V is a Japanese-language version of MS-DOS which can run on
          standard (non-Japanese) ATs and compatible equipped with a VGA or
          newer video adapter
Notes:  subfunctions 11h and 13h are only valid when DOS/V is using video
          mode 73h
        the cursor position is not changed by these functions
        extended attributes consist of three bytes; the first is the standard
          character attribute byte, the second is as described below, and the
          third is always zero in current versions
SeeAlso: AH=00h,AH=13h"VIDEO"

Bitfields for DOS/V second extended attribute byte:
Bit(s)  Description     (Table 00036)
 7      underline using foreground color
 6      reverse foreground/background specified in standard attribute byte
 5-4    unused
 3      vertical white grid line in cell
 2      horizontal white grid line in cell
 1-0    unused
SeeAlso: #00014,#00026
--------V-101400-----------------------------
INT 10 - VIDEO - LOAD USER-SPECIFIED LCD CHARACTER FONT (CONV,Compaq Port 386)
        AX = 1400h
        ES:DI -> character font
        BH = number of bytes per character
            08h or 10h (Compaq)
        BL = 00h load main font (block 0)
             01h load alternate font (block 1)
        CX = number of characters to store
        DX = character offset into RAM font area
Return: nothing
SeeAlso: AX=1100h,AX=1110h,AX=1401h
--------V-101401-----------------------------
INT 10 - VIDEO - LOAD SYSTEM ROM DEFAULT LCD CHARACTER FONT (CONV,CP386)
        AX = 1401h
        BL = font to load
            00h main font (block 0)
            01h alternate font (block 1)
Return: nothing
SeeAlso: AX=1100h,AX=1102h,AX=1400h
--------V-101402-----------------------------
INT 10 - VIDEO - SET MAPPING OF LCD HIGH INTENSITY ATTRIBUTES (CONV,CP386)
        AX = 1402h
        BL = subfunction
            00h ignore high intensity attribute
            01h map high intensity to reverse video
            02h map high intensity to underscore
            03h map high intensity to selected alternate font
            B0h half intensity (Compaq)
            B1h toggle active intensity bit interpretation (CP386)
Return: nothing
--------V-1015-------------------------------
INT 10 - VIDEO - GET PHYSICAL DISPLAY PARAMETERS (CONVERTIBLE)
        AH = 15h
Return: AX = alternate display adapter type (see #00037)
        ES:DI -> parameter table (see #00038)
SeeAlso: AH=1Bh

(Table 00037)
Values for PC Convertible alternate display adapter type:
 0000h  none
 5140h  LCD
 5153h  CGA
 5151h  mono

Format of PC Convertible display parameter table:
Offset  Size    Description     (Table 00038)
 00h    WORD    monitor model number
 02h    WORD    vertical pixels per meter
 04h    WORD    horizontal pixels per meter
 06h    WORD    total vertical pixels
 08h    WORD    total horizontal pixels
 0Ah    WORD    horizontal pixel separation in micrometers
                (width, center-to-center)
 0Ch    WORD    vertical pixel separation in micrometers
                (height, center-to-center)
--------V-1015-------------------------------
INT 10 - VIDEO - SET SUPERIMPOSE MODE (Sperry PC)
        AH = 15h
        AL = superimpose mode
            00h show graphics screen
            01h show text screen
            02h show text screen superimposed on graphics screen
Return: nothing
--------J-1018-------------------------------
INT 10 - VIDEO - DOS/V - GET/SET FONT PATTERN
        AH = 18h
        AL = subfunction
            00h get font pattern
            01h set font pattern
        BX = 0000h
        CL = character size in bytes (01h,02h)
        CH = 00h
        DH = character width in pixels
        DL = character height in pixels
        ES:DI -> buffer for/containing font image
Return: AL = status (00h successful, else error)
        ES:DI buffer filled for function 00h if successful
Note:   the supported font sizes are 8x16 single-byte, 8x19 single-byte,
          16x16 double-byte, and 24x24 double-byte
SeeAlso: AH=19h,INT 16/AH=14h
--------V-1019-------------------------------
INT 10 - Japanese VIDEO - DOUBLE-BYTE CHARACTER SET SHIFT INFORMATION
        AH = 19h
        ???
Return: ???
SeeAlso: AH=18h,INT 16/AH=14h
--------V-101A00-----------------------------
INT 10 - VIDEO - GET DISPLAY COMBINATION CODE (PS,VGA/MCGA)
        AX = 1A00h
Return: AL = 1Ah if function was supported
            BL = active display code (see #00039)
            BH = alternate display code (see #00039)
Notes:  this function is commonly used to check for the presence of a VGA
        this function is supported on the ATI EGA Wonder with certain
          undocumented configuration switch settings, even though the EGA
          Wonder does not support VGA graphics; to distinguish this case,
          call AX=1C00h with CX nonzero, which the EGA Wonder does not support
SeeAlso: AH=12h/BL=35h,AX=1A01h,AH=1Bh,AH=1Ch,MEM 0040h:008Ah
Index:  installation check;VGA

(Table 00039)
Values for display combination code:
 00h    no display
 01h    monochrome adapter w/ monochrome display
 02h    CGA w/ color display
 03h    reserved
 04h    EGA w/ color display
 05h    EGA w/ monochrome display
 06h    PGA w/ color display
 07h    VGA w/ monochrome analog display
 08h    VGA w/ color analog display
 09h    reserved
 0Ah    MCGA w/ digital color display
 0Bh    MCGA w/ monochrome analog display
 0Ch    MCGA w/ color analog display
 FFh    unknown display type
--------V-101A01-----------------------------
INT 10 - VIDEO - SET DISPLAY COMBINATION CODE (PS,VGA/MCGA)
        AX = 1A01h
        BL = active display code (see #00039)
        BH = alternate display code
Return: AL = 1Ah if function was supported
SeeAlso: AH=12h/BL=35h,AX=1A00h
--------V-101B-------------------------------
INT 10 - VIDEO - FUNCTIONALITY/STATE INFORMATION (PS,VGA/MCGA)
        AH = 1Bh
        BX = implementation type
            0000h return funtionality/state information
        ES:DI -> 64-byte buffer for state information (see #00040)
Return: AL = 1Bh if function supported
            ES:DI buffer filled with state information
BUG:    Trident 8900 (BIOS D3.0 11/12/91) and Trident 9000 (C3.0 10/25/91)
          do not correctly set the fields at offsets 27h and 29h of the
          state information
SeeAlso: AH=15h,AX=1A00h,AX=1F01h

Format of MCGA+ state information:
Offset  Size    Description     (Table 00040)
 00h    DWORD   address of static funtionality table (see #00045)
 04h    BYTE    video mode in effect
 05h    WORD    number of columns
 07h    WORD    length of regen buffer in bytes
 09h    WORD    starting address of regen buffer
 0Bh    WORD    cursor position for page 0
 0Dh    WORD    cursor position for page 1
 0Fh    WORD    cursor position for page 2
 11h    WORD    cursor position for page 3
 13h    WORD    cursor position for page 4
 15h    WORD    cursor position for page 5
 17h    WORD    cursor position for page 6
 19h    WORD    cursor position for page 7
 1Bh    WORD    cursor "type" (start/stop scan lines)
 1Dh    BYTE    active display page
 1Eh    WORD    CRTC port address
 20h    BYTE    current setting of PORT 03x8h
 21h    BYTE    current setting of PORT 03x9h
 22h    BYTE    number of rows - 1
 23h    WORD    bytes/character
 25h    BYTE    display combination code of active display
 26h    BYTE    DCC of alternate display
 27h    WORD    number of colors supported in current mode (0000h = mono)
 29h    BYTE    number of pages supported in current mode
 2Ah    BYTE    number of scan lines active
                (0,1,2,3) = (200,350,400,480)
                Tseng ET3000: (4,5,6 = 512,600,768)
 2Bh    BYTE    primary character block
 2Ch    BYTE    secondary character block
 2Dh    BYTE    miscellaneous flags (see #00041)
 2Eh    BYTE    non-VGA mode support (see #00042)
 2Fh  2 BYTEs   reserved (00h)
 31h    BYTE    video memory available
                00h = 64K, 01h = 128K, 02h = 192K, 03h = 256K
 32h    BYTE    save pointer state flags (see #00043)
 33h    BYTE    display information and status (see #00044)
 34h 12 BYTEs   reserved (00h)

Bitfields for miscellaneous flags:
Bit(s)  Description     (Table 00041)
 0      all modes on all displays on
 1      gray summing on
 2      monochrome display attached
 3      default palette loading disabled
 4      cursor emulation enabled
 5      0 = intensity; 1 = blinking
 6      flat-panel display is active
 7      unused (0)
SeeAlso: #00040

Bitfields for non-VGA mode support:
Bit(s)  Description     (Table 00042)
 7-5    reserved
 4      132-column mode supported
 3      =1 MFI attributes enabled (see AH=12h/BL=37h)
        =0 VGA attributes
 2      16-bit VGA graphics present
 1      adapter interface driver required
 0      BIOS supports information return for adapter interface
SeeAlso: #00040

Bitfields for save pointer state flags:
Bit(s)  Description     (Table 00043)
 0      512 character set active
 1      dynamic save area present
 2      alpha font override active
 3      graphics font override active
 4      palette override active
 5      DCC override active
 6-7    unused (0)
SeeAlso: #00040

Bitfields for display information and status:
Bit(s)  Description     (Table 00044)
 7      640x480 flat-panel can be used simultaneously with CRT controller
 6-3    reserved
 2      color display
 1      flat-panel display active
 0      flat-panel display attached
SeeAlso: #00040

Format of Static Functionality Table:
Offset  Size    Description     (Table 00045)
 00h    BYTE    modes supported 1
                bit 0 to bit 7 = 1 modes 0,1,2,3,4,5,6,7 supported
 01h    BYTE    modes supported 2
                bit 0 to bit 7 = 1 modes 8,9,0Ah,0Bh,0Ch,0Dh,0Eh,0Fh supported
 02h    BYTE    modes supported 3
                bit 0 to bit 3 = 1 modes 10h,11h,12h,13h supported
                bit 4 to bit 7 unused (0)
 03h    BYTE    (IBM) reserved
                (Tseng ET3000/4000) modes supported 4
                                bit 0 to bit 7 = modes 18h-1Fh supported
 04h    BYTE    (IBM) reserved
                (Tseng ET3000/4000) modes supported 5
                                bit 0 to bit 7 = modes 20h-27h supported
 05h    BYTE    (IBM) reserved
                (Tseng ET3000/4000) modes supported 6
                                bit 0 to bit 7 = modes 28h-2Fh supported
 06h    BYTE    (IBM) reserved
                (Tseng ET3000/4000) modes supported 7
                                bit 0 to bit 7 = modes 30h-37h supported
 07h    BYTE    scan lines supported
                bit 0 to bit 2 = 1 if scan lines 200,350,400 supported
                bits 3-7 = unused (0)
 08h    BYTE    total number of character blocks available in text modes
 09h    BYTE    maximum number of active character blocks in text modes
 0Ah    WORD    miscellaneous function support flags (see #00046)
 0Ch    WORD    reserved
 0Eh    BYTE    save pointer function flags (see #00047)
 0Fh    BYTE    reserved
SeeAlso: #00040

Bitfields for miscellaneous function support flags:
Bit(s)  Description     (Table 00046)
 0      all modes on all displays function supported
 1      gray summing function supported
 2      character font loading function supported
 3      default palette loading enable/disable supported
 4      cursor emulation function supported
 5      EGA palette present
 6      color palette present
 7      color-register paging function supported
 8      light pen supported (see AH=04h)
 9      save/restore state function 1Ch supported
 10     intensity/blinking function supported (see AX=1003h)
 11     Display Combination Code supported (see #00039)
 12-15  unused (0)
SeeAlso: #00040

Bitfields for save pointer function flags:
Bit(s)  Description     (Table 00047)
 0      512 character set supported
 1      dynamic save area supported
 2      alpha font override supported
 3      graphics font override supported
 4      palette override supported
 5      DCC extension supported
 6-7    unused (0)
SeeAlso: #00040
--------V-101C-------------------------------
INT 10 - VIDEO - SAVE/RESTORE VIDEO STATE (PS50+,VGA)
        AH = 1Ch
        AL = function
            00h return state buffer size
                Return: BX = number of 64-byte blocks needed
            01h save video state
                ES:BX -> buffer
            02h restore video state
                ES:BX -> buffer containing previously saved state
        CX = requested states (see #00048)
Return: AL = 1Ch if function supported
Notes:  many BIOSes corrupt the video registers when saving the state, so a
          program should restore the state immediately after saving it (the
          saved data is uncorrupted)
        the BIOS data area consists of the 96 bytes from 0040h:0049h-00A8h
        this function is not supported when DOS/V is running
        this function may be a better VGA installation check than the usual
          INT 10/AX=1A00h, since some late-model EGA cards (such as the ATI
          EGA Wonder) supported that call
SeeAlso: AX=1A00h,AX=5F90h,AX=5FA0h,MEM 0040h:00A8h

Bitfields for requested states:
Bit(s)  Description     (Table 00048)
 0      video hardware (see #00049)
 1      BIOS data areas
 2      color registers and DAC state (see #00050)
 3-15   unused (0)
SeeAlso: #00186

Format of VGA video hardware state:
Offset  Size    Description     (Table 00049)
 00h    BYTE    sequencer index register
 01h    BYTE    CRTC index register
 02h    BYTE    graphics controller index register
 03h    BYTE    attribute controller index register
 04h    BYTE    feature controller register
 05h  4 BYTEs   sequencer registers
 09h    BYTE    sequencer register 0
 0Ah 25 BYTEs   CRTC registers 0-8
 23h 16 BYTEs   palette registers 00h-0Fh
 33h  4 BYTEs   attribute registers 10h-13h
 37h  9 BYTEs   graphics controller registers 0-8
 40h    BYTE    CRTC base address (low)
 41h    BYTE    CRTC base address (high)
 42h    BYTE    plane 0 latch
 43h    BYTE    plane 1 latch
 44h    BYTE    plane 2 latch
 45h    BYTE    plane 3 latch

Format of VGA DAC state:
Offset  Size    Description     (Table 00050)
 00h    BYTE    read/write mode DAC
 01h    BYTE    pixel address
 02h    BYTE    pixel mask
 03h 768 BYTEs  color data (256 triples)
303h    BYTE    color select register
--------J-101D-------------------------------
INT 10 - VIDEO - DOS/V - SHIFT STATUS LINE CONTROL
        AH = 1Dh
        AL = function
            00h enable shift status line(s)
                BX = number of lines to reserve at bottom of screen (usu. 1)
            01h disable shift status line
                BX = number of lines reserved at bottom of screen (usually 1)
            02h get number of status lines
                Return: BX = number of lines reserved for shift status
SeeAlso: AH=19h
--------V-101D-------------------------------
INT 10 - SpeedSTAR Plus BIOS v4.23+ - SET SYNC PARAMETERS
        AH = 1Dh
        AL = video mode
        ES = caller's segment
Return: nothing
Note:   the caller's segment contains at offset 5Ch (FCB field in PSP)
          or 100h a table with sync parameters (see #00051) (BIOS looks at both
          offsets)

Format of SpeedSTAR Plus sync table:
Offset  Size    Description     (Table 00051)
 00h  9 BYTEs   ID contains string 'ey5CENTER'
 09h  5 BYTEs   sync parameters for 640x480 modes 11h,12h,25h,26h,2Eh
 0Bh  5 BYTEs   sync parameters for 800x600 modes 29h,30h,2Ah
 13h  5 BYTEs   sync parameters for 1024x768 modes 37h,38h
--------V-101D-------------------------------
INT 10 - Tseng ET-4000 BIOS v3.00 and v8.00 - BUG
        AH = 1Dh
Note:   these versions of the BIOS jump to a random location on this function
          due to a fencepost error
--------V-101DAABXFDEC-----------------------
INT 10 U - Diamond Stealth64 Video - INSTALLATION CHECK
        AX = 1DAAh
        BX = FDECh
Return: BX = CDEFh if Diamond Stealth64 Video 2001-series video card installed
            AL = number of megabytes of video memory
            AH = card type??? (4Bh for VL-Bus/5Bh for PCI)
            CX = ??? (0000h)
            SI:DI -> signature/copyright string
--------V-101E00-----------------------------
INT 10 - VIDEO - FLAT-PANEL - READ INFORMATION
        AX = 1E00h
Return: AL = 1Eh if function supported
            BL = flat-panel status (see #00052)
            ES:DI -> information table (see #00053)
Note:   IBM classifies this function as optional
SeeAlso: AX=1E01h,AX=1E02h,AX=1E03h,AX=1E04h,AX=1E05h,AX=1EFEh

Bitfields for flat-panel status:
Bit(s)  Description     (Table 00052)
 7-3    reserved
 2      color display
 1      flat panel is active
 0      flat panel is attached
SeeAlso: #00053

Format of flat-panel information table:
Offset  Size    Description     (Table 00053)
 00h    BYTE    number of WORDs in the remainder of the table
 01h    WORD    number of vertical pixels per meter
 03h    WORD    number of horizontal pixels per meter
 05h    WORD    total number of vertical pixels
 07h    WORD    total number of horizontal pixels
 09h    WORD    vertical pixel separation in micrometers (center-to-center)
 0Bh    WORD    horizontal pixel separation in micrometers
 0Dh    WORD    range of gray levels available, less 1
 0Fh    WORD    number of red levels available, less 1 (0000h if nonochrome)
 11h    WORD    number of green levels available, less 1 (0000h if nonochrome)
 13h    WORD    number of blue levels available, less 1 (0000h if nonochrome)
SeeAlso: #00052
--------V-101E01-----------------------------
INT 10 - VIDEO - FLAT-PANEL - LCD/CRT DISPLAY CONTROL
        AX = 1E01h
        BH = function
            bit 7: =1 set display control, =0 query control
            bits 6-0: reserved (0)
        ---if BH bit 7 set---
        BL = new display combination (see #00054)
Return: AL = 1Eh if function supported
            BH = results
                bit 7: query/set (copied from input)
                bits 6-3: reserved (0)
                bit 2: simultaneous display is supported by hardware
                bit 1: LCD/CRT display control supported by hardware
                bit 0: set operation was successful (always clear on get)
            BL = active display combination (see #00054)
SeeAlso: AX=1E00h,AX=1E02h

Bitfields for Flat-Panel display combination:
Bit(s)  Description     (Table 00054)
 7-2    reserved (0)
 1-0    combination
        00 reserved
        01 LCD active
        10 CRT active
        11 both LCD and CRT active (simultaneous display)
SeeAlso: #00055
--------V-101E02-----------------------------
INT 10 - VIDEO - FLAT-PANEL - DISPLAY POSITION
        AX = 1E02h
        BH = function
            bit 7: =1 set display position, =0 query position
            bits 6-0: reserved (0)
        ---if BH bit 7 set---
        BL = new position setting (see #00055)
Return: AL = 1Eh if function supported
            BH = results
                bit 7: query/set (copied from input)
                bits 6-4: reserved (0)
                bit 3: positioning to top is supported by hardware
                bit 2: positioning to center is supported by hardware
                bit 1: positioning to bottom is supported by hardware
                bit 0: set operation was successful (always clear on get)
            BL = active position setting (see #00055)
SeeAlso: AX=1E00h,AX=1E01h

Bitfields for Flat-Panel position setting:
Bit(s)  Description     (Table 00055)
 7-2    reserved (0)
 1-0    position
        00 center
        01 top
        10 bottom
        11 reserved
SeeAlso: #00054,#00056
--------V-101E03-----------------------------
INT 10 - VIDEO - FLAT-PANEL - VERTICAL EXPANSION FOR TEXT/GRAPHICS MODES
        AX = 1E03h
        BH = function
            bit 7: =1 set vertical expansion, =0 query expansion
            bits 6-0: reserved (0)
        ---if BH bit 7 set---
        BL = new vertical expansion setting (see #00056)
Return: AL = 1Eh if function supported
            BH = results
                bit 7: query/set (copied from input)
                bits 6-4: reserved (0)
                bit 3: vertical expansion of text is supported by hardware
                bit 2: vertical expansion of graphics is supported by hardware
                bit 1: hardware supports independent control of expansion in
                        text and graphics modes
                bit 0: set operation was successful (always clear on get)
            BL = active vertical expansion setting (see #00056)
SeeAlso: AX=1E00h,AX=1E02h.AX=1E04h

Bitfields for Flat-Panel vertical expansion setting:
Bit(s)  Description     (Table 00056)
 7-2    reserved (0)
 1      vertical expansion turned on for text modes
 0      vertical expansion turned on for graphics modes
SeeAlso: #00054,#00055,#00057
--------V-101E04-----------------------------
INT 10 - VIDEO - FLAT-PANEL - NORMAL/REVERSE VIDEO FOR TEXT/GRAPHICS MODES
        AX = 1E04h
        BH = function
            bit 7: =1 set normal/reverse video, =0 query normal/reverse
            bits 6-0: reserved (0)
        ---if BH bit 7 set---
        BL = new normal/reverse video setting (see #00057)
Return: AL = 1Eh if function supported
            BH = results
                bit 7: query/set (copied from input)
                bits 6-4: reserved (0)
                bit 3: hardware supports reverse video for text modes
                bit 2: hardware supports reverse video for graphics modes
                bit 1: hardware supports independent control of reverse video
                      in text and graphics modes
                bit 0: set operation was successful (always clear on get)
            BL = active normal/reverse video setting (see #00057)
SeeAlso: AX=1E00h,AX=1E03h,AX=1E05h

Bitfields for Flat-Panel normal/reverse video setting:
Bit(s)  Description     (Table 00057)
 7-2    reserved (0)
 1      reverse video for text
 0      reverse video for graphics
SeeAlso: #00054,#00056,#00058,#00059
--------V-101E05-----------------------------
INT 10 - VIDEO - FLAT-PANEL - BRIGHTNESS CONTROL
        AX = 1E05h
        BH = function
            bit 7: =1 set brightness, =0 query brightness
            bits 6-0: reserved (0)
        ---if BH bit 7 set---
        BL = new brightness setting (see #00058)
Return: AL = 1Eh if function supported
            BH = results
                bit 7: query/set (copied from input)
                bits 6-2: reserved (0)
                bit 1: software brightness control is supported
                bit 0: set operation was successful (always clear on get)
            BL = active brightness setting (see #00058)
Note:   this function operates independently of AX=1E07h
SeeAlso: AX=1E00h,AX=1E04h,AX=1E06h,AX=1E07h

Bitfields for Flat-Panel brightness control:
Bit(s)  Description     (Table 00058)
 7-1    reserved (0)
 0      high brightness
SeeAlso: #00057,#00059
--------V-101E06-----------------------------
INT 10 - VIDEO - FLAT-PANEL - CONTRAST CONTROL FOR TEXT/GRAPHICS
        AX = 1E06h
        BH = function
            bit 7: =1 set contrast control, =0 query contrast
            bits 6-0: reserved (0)
        ---if BH bit 7 set---
        BL = new normal/reverse video setting (see #00059)
Return: AL = 1Eh if function supported
            BH = results
                bit 7: query/set (copied from input)
                bits 6-4: reserved (0)
                bit 3: software contrast control supported for text
                bit 2: software contrast control supported for graphics
                bit 1: hardware supports independent control of contrast
                      in text and graphics modes
                bit 0: set operation was successful (always clear on get)
            BL = active contrast setting (see #00059)
Note:   this function operates independently of AX=1E08h
SeeAlso: AX=1E00h,AX=1E04h,AX=1E05h,AX=1E07h,AX=1E08h

Bitfields for Flat-Panel contrast control:
Bit(s)  Description     (Table 00059)
 7-2    reserved (0)
 1      high contrast for text
 0      high contrast for graphics
SeeAlso: #00057,#00058
--------V-101E07-----------------------------
INT 10 - VIDEO - FLAT-PANEL - BRIGHTNESS SETTING
        AX = 1E07h
        BH = function
            bit 7: =1 set brightness control, =0 query brightness
            bit 6: use standard brightness
            bits 5-0: reserved (0)
        ---if BH bits 7,6=10---
        BL = brightness (00h = minimum, FFh = maximum)
Return: AL = 1Eh if function supported
            BH = results
                bit 7: query/set (copied from input)
                bit 6: standard/custom (copied from input)
                bits 5-2: reserved (0)
                bit 1: software brightness control is supported
                bit 0: set operation was succesful (always clear on get)
            BL = brightness (00h = minimum, FFh = maximum)
Note:   this function operates independently of AX=1E05h
SeeAlso: AX=1E00h,AX=1E05h,AX=1E08h
--------V-101E08-----------------------------
INT 10 - VIDEO - FLAT-PANEL - CONTRAST SETTING
        AX = 1E08h
        BH = function
            bit 7: =1 set contrast control, =0 query contrast
            bit 6: use standard contrast
            bits 5-0: reserved (0)
        ---if BH bits 7,6=10---
        BL = contrast (00h = minimum, FFh = maximum)
Return: AL = 1Eh if function supported
            BH = results
                bit 7: query/set (copied from input)
                bit 6: standard/custom (copied from input)
                bits 5-2: reserved (0)
                bit 1: software contrast control is supported
                bit 0: set operation was succesful (always clear on get)
            BL = contrast (00h = minimum, FFh = maximum)
Note:   this function operates independently of AX=1E06h
SeeAlso: AX=1E00h,AX=1E06h,AX=1E07h
--------V-101EFE-----------------------------
INT 10 - VIDEO - FLAT-PANEL - FUNCTION SUPPORT FLAG
        AX = 1EFEh
        ES:DI -> DWORD buffer for bitmap of supported functions
                (set to all zeros before calling)
Return: ES:DI buffer updated with mask of supported functions
Index:  installation check;flat-panel display support
SeeAlso: AX=1E00h,AX=1E06h
--------V-101F00-----------------------------
INT 10 - VIDEO - XGA - GET DMQS (Display Mode Query and Set) DATA LENGTH
        AX = 1F00h
Return: AL = 1Fh if supported
            BX = number of bytes of DMQS data
Note:   not supported on the original IBM XGA, only on XGA-NI (non-interlaced)
          and later models.
SeeAlso: AX=1F01h
--------V-101F01-----------------------------
INT 10 - VIDEO - XGA - READ DMQS DATA
        AX = 1F01h
        ES:DI -> user buffer for return data (call AX=1F00h for size)
Return: AL = 1Fh if function supported
        user buffer filled with DMQS data (see #00060)
Note:   not supported on the original IBM XGA, only on XGA-NI (non-interlaced)
          and later models.
SeeAlso: AH=1Bh,AX=1F00h,AX=3000h

Format of XGA DMQS buffer:
Offset  Size    Description     (Table 00060)
 00h    WORD    offset (in bytes) to DMQS data for next XGA instance
 02h    BYTE    slot number
 03h    BYTE    XGA implementation function level identifier
 04h    BYTE    XGA implementation resolution level identifier
 05h    WORD    vendor identifier - identifies card vendor
 07h    WORD    vendor defined field
 09h    WORD    XGA adapter I/O register base address
 0Bh    WORD    XGA coprocessor register base address
                (paragraph--multiply by 10h to get physical address)
 0Dh    WORD    1 Megabyte system video memory aperture
                0000h if not allocated
                (Multiply by 100000h to get physical address)
 0Fh    WORD    4 Megabyte system video memory aperture
                0000h if not allocated
                (multiply by 100000h to get physical address)
 11h    WORD    video memory base address
                (multiply by 100000h to get physical address)
 13h    WORD    composite ID of the attached display
 15h    BYTE    amount of video memory available, in multiples of 256K bytes
 16h    DWORD   alternate XGA coprocessor register base address.  0 = none.
 1Ah    var     DMQS Data for further XGA Instances (as above)
Note:   "Instances" refers to the capability of having up to 8 XGA
          adapters in one computer.
SeeAlso: #00061
--------V-101F02-----------------------------
INT 10 - VIDEO - XGA - GET SVGA DMQS DATA LENGTH
        AX = 1F02h
Return: AL = 1Fh if function supported
            BX = length of SVGA DMQS data in bytes
SeeAlso: AX=1F00h,AX=1F03h
--------V-101F03-----------------------------
INT 10 - VIDEO - XGA - GET SVGA DMQS DATA
        AX = 1F03h
        ES:DI -> buffer for SVGA DMQS data (see #00061)
Return: AL = 1Fh if function supported
            ES:DI buffer filled
SeeAlso: AX=1F00h,AX=1F02h

Format of SVGA DMQS data:
Offset  Size    Description     (Table 00061)
 00h    WORD    offset to DMQS data for next SVGA instance or 0000h
 02h    BYTE    reserved
 03h    BYTE    SVGA implementation functional level
 04h    BYTE    SVGA implementation resolution level
 05h    WORD    vendor ID
 07h    WORD    vendor-specific
 09h  7 BYTEs   reserved
 10h    BYTE    SVGA linear address window size
                00h 64K
                01h 1M
                02h 2M
                03h 4M
 11h    WORD    SVGA linear address window location or 0000h if not allocated
                (multiply by 10000h [shift left 16 bits] to get physical addr)
 13h    WORD    attached monitor's composite monitor ID
 15h    BYTE    available video RAM in multiples of 256K
 16h 11 BYTEs   reserved
SeeAlso: #00060
--------V-103000CX0000-----------------------
INT 10 - VIDEO - LOCATE 3270PC CONFIGURATION TABLE (INSTALLATION CHECK)
        AX = 3000h
        CX = 0000h
        DX = 0000h
Return: CX:DX -> 3270PC configuration table (see #00062)
        CX:DX = 0000h:0000h if 3270PC Control Program not active
SeeAlso: AX=1F01h

Format of 3270 PC configuration table:
Offset  Size    Description     (Table 00062)
 00h    BYTE    aspect ratio X
 01h    BYTE    aspect ratio Y
 02h    BYTE    monitor type (see #00063)
 03h    BYTE    reserved
 04h    BYTE    adapter ID
                00h = 5151/5272 adapter
                04h = 5151/5272 with XGA adapter
                30h = 3295 or 3270PC G/GX adapter
 05h    BYTE    reserved
 06h    BYTE    function flags 1 (see #00064)
 07h    BYTE    function flags 2
                bit 6: GPI graphics supported
 08h    WORD    segment address of Control Program Level table (see #00065)
 0Ah 10 BYTEs   reserved

(Table 00063)
Values for 3270 PC monitor type:
 00h    5151 (mono) or 5272 (color)
 01h    3295
 02h    5151 or 5272 with XGA (???) graphics adapter
 03h    5279 with 3270PC G adapter
 04h    5379 model C01 with 3270PC GX adapter
 05h    5379 model M01 with 3270PC GX adapter
 07h    non-3270PC with 3270 Workstation Program
 FFh    3270PC Control Program not loaded

Bitfields for 3270 PC function flags 1:
Bit(s)  Description     (Table 00064)
 7      mono text, 1 page
 6      color text, 1 page
 5      color text, 4 pages
 4      CGA color graphics
 3      720x350 two-color graphics
 2      360x350 four-color graphics
 1      720x350 eight-color graphics

Format of Control Program Level table:
Offset  Size    Description     (Table 00065)
 00h    WORD    program version
                02xxh = 3270PC Control Program v2.xx
                03xxh = 3270PC Control Program v3.xx
                04xxh = 3270 Workstation Program v1.xx
 02h    BYTE    Control Program ID (00h)
 03h 27 BYTEs   Control Program Descriptor ("IBM 3270 PC CONTROL PROGRAM")
--------a-103800-----------------------------
INT 10 - Tinytalk Personal v1.09f+ - GET CONFIGURATION INFO
        AX = 3800h
Return: ES:DI -> configuration info (see #00066)
Program: Tinytalk is a shareware screen reader by OMS Development/Eric Bohlman
Notes:  this call is also used as the installation check by verifying that the
          returned ES:DI points at valid configuration info
        Tinytalk v1.09f ignores AL and always returns the configuration info;
          v1.10 adds several subfunctions selected with AL
SeeAlso: AX=3801h,AX=3803h,AX=3806h,AH=39h,INT 14/AX=F0F1h
SeeAlso: INT 2F/AX=FB00h"AutoBraille"
Index:  installation check;Tinytalk Personal

Format of Tinytalk Personal configuration info:
Offset  Size    Description     (Table 00066)
 00h  8 BYTEs   signature "TTCONFIG"
 08h    WORD    size of configuration data, not counting signature, this WORD,
                  or the following byte
 0Ah    BYTE    ???
 0Bh    ???     configuration data
--------a-103801-----------------------------
INT 10 - Tinytalk Personal v1.10 - ???
        AX = 3801h
        DL = ???
Return: ???
SeeAlso: AX=3800h,AX=3802h
--------a-103802-----------------------------
INT 10 - Tinytalk Personal v1.10 - ???
        AX = 3802h
        DL = ???
Return: ???
SeeAlso: AX=3800h,AX=3801h
--------a-103803-----------------------------
INT 10 - Tinytalk Personal v1.10 - GET ???
        AX = 3803h
Return: AL = ???
SeeAlso: AX=3800h,AX=3804h,AX=3805h
--------a-103804-----------------------------
INT 10 - Tinytalk Personal v1.10 - GET ???
        AX = 3804h
Return: AX = ???
SeeAlso: AX=3800h,AX=3803h,AX=3805h
--------a-103805-----------------------------
INT 10 - Tinytalk Personal v1.10 - GET ???
        AX = 3805h
Return: AL = ???
SeeAlso: AX=3800h,AX=3803h,AX=3804h
--------a-103806-----------------------------
INT 10 - Tinytalk Personal v1.10 - ???
        AX = 3806h
        ES:DX -> ASCIZ ???
Return: ???
SeeAlso: AX=3800h
--------a-1039-------------------------------
INT 10 - Tinytalk Personal v1.10 - ???
        AH = 39h
Program: Tinytalk is a shareware screen reader by OMS Development/Eric Bohlman
Note:   this function was a NOP in TTDEMO.EXE, but may be implemented in other
          variants of Tinytalk
--------V-1040-------------------------------
INT 10 - VIDEO - Hercules GRAFIX - "GMODE" - SET GRAPHICS MODE
        AH = 40h
Return: nothing
Desc:   switch the Hercules Graphics Card into graphics mode (720x348)
SeeAlso: AH=00h,AH=41h
Index:  video modes;Hercules
--------V-1041-------------------------------
INT 10 - VIDEO - Hercules GRAFIX - "TMODE" - SET TEXT MODE
        AH = 41h
Return: nothing
Desc:   switch the Hercules Graphics Card into text mode
SeeAlso: AH=00h,AH=40h
Index:  video modes;Hercules
--------V-1042-------------------------------
INT 10 - VIDEO - Hercules GRAFIX - "CLRSCR" - CLEAR CURRENT PAGE
        AH = 42h
Return: nothing
SeeAlso: AH=45h
--------V-1043-------------------------------
INT 10 - VIDEO - Hercules GRAFIX - "GPAGE" - SELECT DRAWING PAGE
        AH = 43h
        AL = page number (0,1)
Return: nothing
Desc:   specify which of the two pages of video memory is to be used for
          output
SeeAlso: AH=05h,AH=44h,AH=45h
--------V-1044-------------------------------
INT 10 - VIDEO - Hercules GRAFIX - "LEVEL" - SELECT DRAWING FUNCTION
        AH = 44h
        AL = drawing function
            00h clear pixels
            01h set pixels
            02h invert pixels
Return: nothing
Desc:   specify how graphics output will change the display
SeeAlso: AH=45h,AH=46h,AH=4Ch,AH=4Dh
--------V-1045-------------------------------
INT 10 - VIDEO - Hercules GRAFIX - "DISP" - SELECT PAGE TO DISPLAY
        AH = 45h
        AL = page number (0,1)
Return: nothing
Desc:   specify which of the two pages of video memory is visible on screen
SeeAlso: AH=05h,AH=42h,AH=43h
--------V-1046-------------------------------
INT 10 - VIDEO - Hercules GRAFIX - "PLOT" - DRAW ONE PIXEL
        AH = 46h
        DI = x (0-719)
        BP = y (0-347)
Return: nothing
Notes:  function 44h determines operation and function 43h which page to use
        if the indicated coordinate is valid, this function does nothing
SeeAlso: AH=0Ch,AH=47h,AH=49h,AH=4Ch,AH=4Dh
--------V-1047-------------------------------
INT 10 - VIDEO - Hercules GRAFIX - "GETPT" - FIND PIXEL VALUE
        AH = 47h
        DI = x (0-719)
        BP = y (0-347)
Return: AL = 00h pixel clear
        AL = 01h pixel set
Note:   function 43h specifies which page is used
SeeAlso: AH=0Dh,AH=46h
--------V-1048-------------------------------
INT 10 - VIDEO - Hercules GRAFIX - "MOVE" - MOVE TO POINT
        AH = 48h
        DI = x (0-719)
        BP = y (0-347)
Return: nothing
Desc:   specify the location from which to start the next graphics output
SeeAlso: AH=49h
--------V-1049-------------------------------
INT 10 - VIDEO - Hercules GRAFIX - "DLINE" - DRAW TO POINT
        AH = 49h
        DI = x (0-719)
        BP = y (0-347)
Return: nothing
Note:   function 48h or 49h specify first point, 44h operation and 43h page to
          use
SeeAlso: AH=43h,AH=44h,AH=48h,AH=4Ch,AH=4Dh
--------V-104A-------------------------------
INT 10 - VIDEO - Hercules GRAFIX - "BLKFIL" - BLOCK FILL
        AH = 4Ah
        DI = x coordinate of lower left corner
        BP = y coordinate of lower left corner
        BX = height in pixels
        CX = width in pixels
Return: nothing
Desc:   draw a solid rectangle of the specified size at the given location
SeeAlso: AH=4Eh
--------V-104B-------------------------------
INT 10 - VIDEO - Hercules GRAFIX - "TEXT" - DISPLAY CHARACTER
        AH = 4Bh
        AL = character to display
        DI = x (0-719)
        BP = y (0-347)
Return: nothing
Notes:  unlike the other BIOS character functions character position is
          specified in pixels rather than rows and columns
        the character is writting using the drawing function last specified by
          AH=44h
SeeAlso: AH=09h,AH=0Ah
--------P-104B-------------------------------
INT 10 - FRIEZE - API
        AH = 4Bh
        CL = function
            00h (v6.x-) print window
                AL = mode
                    00h character
                    01h normal
                    02h sideways
            01h load window
                ES:BX -> ASCIZ filename from which to read
            02h save window
                ES:BX -> ASCIZ filename to which to write
            03h set print width
                AL = width in 1/4 inches
            04h set print height
                AL = height in 1/4 inches
            05h reserved
            06h set left margin
                AL = printout margin in 1/4 inches
            07h set window size
                ES:BX -> four-WORD structure with Xmin, Ymin, Xmax, Ymax
            08h reserved
            09h set patterns
                ES:BX -> 16-BYTE vector of screen->printer color correspondnces
            0Ah get patterns
                ES:BX -> 16-BYTE buffer for color correspondences
            0Bh set mode
                AL = mode
            0Ch (v7.41) ???
                AL = ???
                    00h ??? (calls original INT 05)
                    else ???
            0Dh (v7.41) ???
                AL = ???
                    00h ??? (calls original INT 05)
                    else ???
            0Eh (v7.41) ???
                ???
            0Fh get window
                ES:BX -> four-WORD buffer for Xmin, Ymin, Xmax, Ymax
            10h set print options
                ES:BX -> printer options in same format as FRIEZE cmdline
            11h initialize
                ES:BX -> three-WORD array from CARDS.DAT for HRes, VRes, code
            12h (v7.41) ???
                ???
            13h (v7.41) ???
                ???
            14h get version
                Return: AH = major version (00h if FRIEZE version before 7)
                        AL = minor version
            15h set parameters
                ES:BX -> parameter table (see #00068)
            16h get parameters
                ES:BX -> buffer for parameter table (see #00068)
            17h get printer resolution
                ES:BX -> 12-WORD table for six horizontal/vertical resol pairs
            18h (v8.0 only) reserved
            50h (v7.41) get ???
                Return: AX = ???
            51h (v7.41) get ???
                Return: ES = ??? (seen 2348h)
                        AX = ??? (seen 8432h)
Return: AX = status (see #00067)
SeeAlso: AH=0Fh/SI=F123h

(Table 00067)
Values for FRIEZE function status:
 00h    successful
 01h    user aborted printout with ESC
 02h    reserved
 03h    file read error
 04h    file write error or printer error
 05h    file not found
 06h    invalid header (not an image or wrong screen mode) or can't create file
 07h    file close error
 08h    disk error
 09h    (v7.0+) printer error
 0Ah    invalid function
 0Bh    (v7.0+) can't create file
 0Ch    (v7.0+) wrong video mode

Format of FRIEZE parameter table:
Offset  Size    Description     (Table 00068)
 00h    WORD    top margin (1/100 inch)
 02h    WORD    left margin (1/100 inch)
 04h    WORD    horizontal size (1/100 inch)
 06h    WORD    vertical size (1/100 inch)
 08h    WORD    quality/draft mode
                00h draft mode
                01h quality mode
                02h use horizontal/vertical resolution for output resolution
 0Ah    WORD    printer horizontal resolution (dots per inch)
 0Ch    WORD    printer vertical resolution (dots per inch)
 0Eh    WORD    reserved (FFFFh)
Note:   any field which should remain unchanged may be filled with FFFFh
--------V-104C-------------------------------
INT 10 - VIDEO - Hercules GRAFIX - "ARC" - DRAW ARC
        AH = 4Ch
        AL = quadrant (1 = upper right, 2 = upper left, etc)
        DI = x coordinate of center
        BP = y coordinate of center
        BX = radius
Return: nothing
SeeAlso: AH=49h,AH=4Dh
--------V-104D-------------------------------
INT 10 - VIDEO - Hercules GRAFIX - "CIRC" - DRAW CIRCLE
        AH = 4Dh
        DI = x of center
        BP = y of center
        BX = radius
Return: nothing
SeeAlso: AH=49h,AH=4Ch
--------V-104E-------------------------------
INT 10 - VIDEO - Hercules GRAFIX - "FILL" - FILL AREA
        AH = 4Eh
        DI = x coordinate of an interior point
        BP = y coordinate of an interior point
Return: nothing
Desc:   fill a convex polygonal area bounded by a contiguous line of the
          opposite color with the border color
Note:   the first fill makes the figure solid, the second erases it
SeeAlso: AH=4Ah
--------V-104E00-----------------------------
INT 10 - VESA XGA BIOS Extensions - GET XGA ENVIRONMENT INFORMATION
        AX = 4E00h
        ES:DI -> 256-byte buffer for XGA information (see #00069)
Return: AL = 4Eh if function supported
            AH = status
                00h successful
                else error code
Desc:   determine whether VESA XGA extensions are present and the capabilities
          supported by the display adapter
SeeAlso: AX=4E01h,AX=4E02h,AX=4F00h
Index:  installation check;VESA XGA

Format of XGA information buffer:
Offset  Size    Description     (Table 00069)
 00h  4 BYTEs   signature ("VESA")
 04h    WORD    VESA version number
 06h    DWORD   pointer to ASCIZ OEM string
 0Ah    DWORD   environment flags (see #00070)
 0Eh    WORD    number of XGA adapters installed (other VESA XGA functions
                  require a handle indicating which adapter to use)
 10h 240 BYTEs  reserved

Bitfields for XGA environment flags:
Bit(s)  Description     (Table 00070)
 0-1    system bus (00 = MCA, 01 = ISA, 10 = EISA)
 2      bus mastering available
 3-31   reserved
--------V-104E01----------------------------
INT 10 - VESA XGA BIOS Extensions - RETURN XGA SUBSYSTEM INFORMATION
        AX = 4E01h
        DX = XGA handle (0 to number of XGAs-1)
        ES:DI -> 256-byte buffer for subsystem information (see #00071)
Return: AL = 4Eh if function supported
        AH = status
            00h  function successful
            else error code
SeeAlso: AX=4E00h,AX=4E02h

Format of XGA subsystem information:
Offset  Size    Description     (Table 00071)
 00h    DWORD   pointer to null-terminated board OEM string
 04h    DWORD   capabilities (see #00072)
 08h    DWORD   pointer to 8KB XGA ROM (or NULL)
 0Ch    DWORD   pointer to the XGA memory mapped registers
 10h    WORD    base address of XGA I/O registers (21x0h)
 12h    DWORD   pointer to start of physical video memory
                (A000h:0000h or B000h:0000h)
 16h    DWORD   physical address of 4MB aperture (or NULL if none)
 1Ah    DWORD   physical address of 1MB aperture (or NULL if none)
 1Eh    DWORD   physical address of 64KB aperture (or NULL if not enabled)
 22h    DWORD   physical address of OEM aperture (or NULL if none)
 26h    WORD    size of OEM aperture in 64KByte units
 28h    DWORD   pointer to list of video modes
                The list is a series of WORDs terminated by FFFFh
 2Ch    WORD    number of 64KB blocks on the board
 2Eh    DWORD   XGA manufacturer ID
                byte 0 POS data index 1
                byte 1 is index 2
                byte 2 is 21xAh index 75h
 32h 206 BYTEs  reserved

Bitfields for XGA capabilities:
Bit(s)  Description     (Table 00072)
 0-1    board bus architecture: 0=MCA, 1=ISA, 3=EISA
 2-3    reserved
 4-6    DMA Channel assigned for acquiring bus mastership (only for ISA bus)
 7      DMA Channel Status (ISA only). enabled if set
 8-31   reserved
--------V-104E02-----------------------------------
INT 10 - VESA XGA BIOS Extensions - RETURN XGA MODE INFORMATION
        AX = 4E02h
        CX = Video mode
        DX = XGA handle
        ES:DI -> 256 byte buffer for mode information (see #00073)
Return: AL = 4Eh if function supported
        AH = status
            00h  function successful
            else error code
SeeAlso: AX=4E00h,AX=4E01h

Format of XGA mode information:
Offset  Size    Description     (Table 00073)
 00h    WORD    attributes of the mode (see #00074)
 02h    WORD    bytes per logical scanline
 04h    WORD    horizontal resolution in pixels
 06h    WORD    vertical resolution in scanlines
 08h    BYTE    character Width in pixels
 09h    BYTE    character Height in pixels
 0Ah    BYTE    number of planes
 0Bh    BYTE    bits per pixels
 0Ch    BYTE    memory model (see #00075)
 0Dh    BYTE    number of Image Pages
 0Eh    BYTE    number of Red bits
 0Fh    BYTE    bit position of Red bit field
 10h    BYTE    number of Green bits
 11h    BYTE    bit position of Green bit field
 12h    BYTE    number of Blue bits
 13h    BYTE    bit position of Blue bit field
 14h    BYTE    number of Reserved bits
 15h    BYTE    bit position of Reserved bit field
 16h 235 BYTEs  reserved

Bitfields for XGA mode attributes:
Bit(s)  Description     (Table 00074)
 0      set if mode is supported
 1      reserved
 2      output is supported by the BIOS
 3      reserved
 4      if set this is a graphics mode (VGA registers inactive, XGA active),
          if clear this is a text mode (VGA registers active, XGA inactive)

(Table 00075)
Values for XGA video memory model:
 00h    Text Mode
 01h    CGA graphics
 02h    Hercules graphics
 03h    4-planar graphics
 04h    Packed Pixel
 05h    Non-chain 4, 256 color
 06h    Direct Color
 07h    YUV-24
--------V-104E03-----------------------------------
INT 10 - VESA XGA BIOS Extensions - SET XGA VIDEO MODE
        AX = 4E03h
        BX = video mode
        CX = other command flags
             bit 0  If clear the feature connector is set to the default state
        DX = XGA handle
        ES:DI -> 256 byte buffer
Return: AL = 4Eh if function supported
        AH = status
            00h  function successful
            else error code
SeeAlso: AH=00h,AX=4E04h,AX=4F02h
--------V-104E04-----------------------------------
INT 10 - VESA XGA BIOS Extensions - RETURN CURRENT VIDEO MODE
        AX = 4E04h
        DX = XGA handle
Return: AL = 4Eh if function supported
        AH = status
            00h  function successful
                BX??? = current mode
            else error code
SeeAlso: AH=0Fh,AX=4E03h,AX=4F03h
--------V-104E05-----------------------------------
INT 10 - VESA XGA BIOS Extensions - SET FEATURE CONNECTOR STATE
        AX = 4E05h
        BX = Feature Connector State (see #00076)
        DX = XGA handle
Return: AL = 4Eh if function supported
        AH = status
            00h  function successful
            else error code
SeeAlso: AX=4E00h,AX=4E06h

Bitfields for XGA Feature Connector State:
Bit(s)  Description     (Table 00076)
 0      Feature Connector is enabled
 1      Feature Connector is in Output Mode rather than Input Mode
 2-15   reserved (0)
--------V-104E06-----------------------------------
INT 10 - VESA XGA BIOS Extensions - RETURN FEATURE CONNECTOR STATE
        AX = 4E06h
        DX = XGA handle
Return: AL = 4Eh if function supported
        AH = status
            00h  function successful
            else error code
        BX = Feature Connector State (see #00076)
SeeAlso: AX=4E00h,AX=4E05h
--------V-104F00-----------------------------
INT 10 - VESA SuperVGA BIOS (VBE) - GET SuperVGA INFORMATION
        AX = 4F00h
        ES:DI -> buffer for SuperVGA information (see #00077)
Return: AL = 4Fh if function supported
        AH = status
            00h successful
                ES:DI buffer filled
            01h failed
            ---VBE v2.0---
            02h function not supported by current hardware configuration
            03h function invalid in current video mode
Desc:   determine whether VESA BIOS extensions are present and the capabilities
          supported by the display adapter
SeeAlso: AX=4E00h,AX=4F01h,AX=7F00h"SOLLEX",AX=A00Ch
Index:  installation check;VESA SuperVGA

Format of SuperVGA information:
Offset  Size    Description     (Table 00077)
 00h  4 BYTEs   (ret) signature ("VESA")
                (call) VESA 2.0 request signature ("VBE2"), required to receive
                  version 2.0 info
 04h    WORD    VESA version number (one-digit minor version -- 0102h = v1.2)
 06h    DWORD   pointer to OEM name
                "761295520" for ATI
 0Ah    DWORD   capabilities flags (see #00078)
 0Eh    DWORD   pointer to list of supported VESA and OEM video modes
                (list of words terminated with FFFFh)
 12h    WORD    total amount of video memory in 64K blocks
---VBE v1.x ---
 14h 236 BYTEs  reserved
---VBE v2.0 ---
 14h    WORD    OEM software version (BCD, high byte = major, low byte = minor)
 16h    DWORD   pointer to vendor name
 1Ah    DWORD   pointer to product name
 1Eh    DWORD   pointer to product revision string
 22h    WORD    (if capabilities bit 3 set) VBE/AF version (BCD)
                0100h for v1.0P
 24h    DWORD   (if capabilities bit 3 set) pointer to list of supported
                  accelerated video modes (list of words terminated with FFFFh)
 28h 216 BYTEs  reserved for VBE implementation
100h 256 BYTEs  OEM scratchpad (for OEM strings, etc.)
Notes:  the list of supported video modes is stored in the reserved portion of
          the SuperVGA information record by some implementations, and it may
          thus be necessary to either copy the mode list or use a different
          buffer for all subsequent VESA calls
        the 1.1 VESA document specifies 242 reserved bytes at the end, so the
          buffer should be 262 bytes to ensure that it is not overrun; for
          v2.0, the buffer should be 512 bytes
        the S3 specific video modes will most likely follow the FFFFh
          terminator at the end of the standard modes.  A search must then
          be made to find them, FFFFh will also terminate this second list
        in some cases, only a "stub" VBE may be present, supporting only
          AX=4F00h; this case may be assumed if the list of supported video
          modes is empty (consisting of a single word of FFFFh)

Bitfields for VESA capabilities:
Bit(s)  Description     (Table 00078)
 0      DAC can be switched into 8-bit mode
 1      non-VGA controller
 2      programmed DAC with blank bit (i.e. only during blanking interval)
 3      controller supports VBE/AF v1.0P extensions
 4      (VBE/AF) must call EnableDirectAccess to access framebuffer
 5      (VBE/AF) controller supports hardware mouse cursor
 6      (VBE/AF) controller supports hardware clipping
 7      (VBE/AF) controller supports transparent BitBLT
 8-31   reserved (0)
SeeAlso: #00077,AX=4F09h
--------V-104F01-----------------------------
INT 10 - VESA SuperVGA BIOS - GET SuperVGA MODE INFORMATION
        AX = 4F01h
        CX = SuperVGA video mode
            bit 14 set means enable linear framebuffer mode (VBE v2.0+)
            bit 13 set means VBE/AF v1.0P initializes accelerator hardware
        ES:DI -> 256-byte buffer for mode information (see #00079)
Return: AL = 4Fh if function supported
        AH = status
            00h successful
                ES:DI buffer filled
            01h failed
Desc:   determine the attributes of the specified video mode
SeeAlso: AX=4F00h,AX=4F02h

Format of VESA SuperVGA mode information:
Offset  Size    Description     (Table 00079)
 00h    WORD    mode attributes (see #00080)
 02h    BYTE    window attributes, window A (see #00081)
 03h    BYTE    window attributes, window B (see #00081)
 04h    WORD    window granularity in KB
 06h    WORD    window size in KB
 08h    WORD    start segment of window A
 0Ah    WORD    start segment of window B
 0Ch    DWORD   -> FAR window positioning function (equivalent to AX=4F05h)
 10h    WORD    bytes per scan line
---remainder is optional for VESA modes in v1.0/1.1, needed for OEM modes---
 12h    WORD    width in pixels (graphics) or characters (text)
 14h    WORD    height in pixels (graphics) or characters (text)
 16h    BYTE    width of character cell in pixels
 17h    BYTE    height of character cell in pixels
 18h    BYTE    number of memory planes
 19h    BYTE    number of bits per pixel
 1Ah    BYTE    number of banks
 1Bh    BYTE    memory model type (see #00082)
 1Ch    BYTE    size of bank in KB
 1Dh    BYTE    number of image pages
 1Eh    BYTE    reserved (0)
---VBE v1.2+---
 1Fh    BYTE    red mask size
 20h    BYTE    red field position
 21h    BYTE    green mask size
 22h    BYTE    green field size
 23h    BYTE    blue mask size
 24h    BYTE    blue field size
 25h    BYTE    reserved mask size
 26h    BYTE    reserved mask position
 27h    BYTE    direct color mode info
                bit 0: color ramp is programmable
                bit 1: bytes in reserved field may be used by application
---VBE v2.0 ---
 28h    DWORD   physical address of linear video buffer
 2Ch    DWORD   pointer to start of offscreen memory
 30h    WORD    KB of offscreen memory
 32h 206 BYTEs  reserved (0)

Bitfields for VESA SuperVGA mode attributes:
Bit(s)  Description     (Table 00080)
 0      mode supported
 1      optional information available
 2      BIOS output supported
 3      set if color, clear if monochrome
 4      set if graphics mode, clear if text mode
---VBE v2.0 ---
 5      mode is not VGA-compatible
 6      bank-switched mode not supported
 7      linear framebuffer mode supported
 8      ???
 9      (VBE/AF v1.0P) application must call EnableDirectAccess before calling
          bank-switching functions
SeeAlso: #00079

Bitfields for VESA SuperVGA window attributes:
Bit(s)  Description     (Table 00081)
 0      exists
 1      readable
 2      writable
 3-7    reserved
SeeAlso: #00079

(Table 00082)
Values for VESA SuperVGA memory model type:
 00h    text
 01h    CGA graphics
 02h    HGC graphics
 03h    16-color (EGA) graphics
 04h    packed pixel graphics
 05h    "sequ 256" (non-chain 4) graphics
 06h    direct color (HiColor, 24-bit color)
 07h    YUV (luminance-chrominance, also called YIQ)
 08h-0Fh reserved for VESA
 10h-FFh OEM memory models
SeeAlso: #00079
--------V-104F02-----------------------------
INT 10 - VESA SuperVGA BIOS - SET SuperVGA VIDEO MODE
        AX = 4F02h
        BX = mode (see #00083,#00084)
            bit 15 set means don't clear video memory
            bit 14 set means enable linear framebuffer mode (VBE v2.0+)
            bit 13 set means VBE/AF v1.0P initializes accelerator hardware
Return: AL = 4Fh if function supported
        AH = status
            00h successful
            01h failed
Notes:  bit 13 may only be set if the video mode is present in the list of
          accelerated video modes returned by AX=4F00h
        if the DAC supports both 8 bits per primary color and 6 bits, it will
          be reset to 6 bits after a mode set; use AX=4F08h to restore 8 bits
SeeAlso: AX=4E03h,AX=4F00h,AX=4F01h,AX=4F03h,AX=4F08h

(Table 00083)
Values for VESA video mode:
 00h-FFh OEM video modes (see #00010 at AH=00h)
 100h   640x400x256
 101h   640x480x256
 102h   800x600x16
 103h   800x600x256
 104h   1024x768x16
 105h   1024x768x256
 106h   1280x1024x16
 107h   1280x1024x256
 108h   80x60 text
 109h   132x25 text
 10Ah   132x43 text
 10Bh   132x50 text
 10Ch   132x60 text
---VBE v1.2---
 10Dh   320x200x32K
 10Eh   320x200x64K
 10Fh   320x200x16M
 110h   640x480x32K
 111h   640x480x64K
 112h   640x480x16M
 113h   800x600x32K
 114h   800x600x64K
 115h   800x600x16M
 116h   1024x768x32K
 117h   1024x768x64K
 118h   1024x768x16M
 119h   1280x1024x32K
 11Ah   1280x1024x64K
 11Bh   1280x1024x16M
---VBE 2.0---
 120h   1600x1200x256
 121h   1600x1200x32K
 122h   1600x1200x64K
81FFh   special full-memory access mode
Note:   the special mode 81FFh preserves the contents of the video memory and
          gives access to all of the memory; VESA recommends that the special
          mode be a packed-pixel mode
SeeAlso: #00010,#00011,#00084,#00191
Index:  video modes;VESA

(Table 00084)
Values for S3 OEM video mode:
 201h   640x480x256
 202h   800x600x16
 203h   800x600x256
 204h   1024x768x16
 205h   1024x768x256
 206h   1280x960x16
 207h   1152x864x256 (Diamond Stealth 64)
 208h   1280x1024x16
 209h   1152x864x32K
 20Ah   1152x864x64K (Diamond Stealth 64)
 20Bh   1152x864x4G
 211h   640x480x64K (Diamond Stealth 24)
 211h   640x400x4G  (Diamond Stealth64 Video / Stealth64 Graphics)
 212h   640x480x16M (Diamond Stealth 24)
 301h   640x480x32K
Note:   these modes are only available on video cards using S3's VESA driver
SeeAlso: #00083,#00191,#00732 at INT 1A/AX=B102h
Index:  video modes;S3
--------V-104F03-----------------------------
INT 10 - VESA SuperVGA BIOS - GET CURRENT VIDEO MODE
        AX = 4F03h
Return: AL = 4Fh if function supported
        AH = status
            00h successful
                BX = video mode (see #00083,#00084)
                    bit 13: VBE/AF v1.0P accelerated video mode
                    bit 14: linear frame buffer enabled (VBE v2.0+)
                    bit 15: don't clear video memory
            01h failed
SeeAlso: AH=0Fh,AX=4E04h,AX=4F02h
--------V-104F04-----------------------------
INT 10 - VESA SuperVGA BIOS - SAVE/RESTORE SuperVGA VIDEO STATE
        AX = 4F04h
        DL = subfunction
            00h get state buffer size
                Return: BX = number of 64-byte blocks needed
            01h save video states
                ES:BX -> buffer
            02h restore video states
                ES:BX -> buffer
        CX = states to save/restore (see #00085)
Return: AL = 4Fh if function supported
        AH = status
            00h successful
            01h failed
SeeAlso: AH=1Ch,AX=5F90h,AX=5FA0h

Bitfields for VESA SuperVGA states to save/restore:
Bit(s)  Description     (Table 00085)
 0      video hardware state
 1      video BIOS data state
 2      video DAC state
 3      SuperVGA state
SeeAlso: #00048,#00186
--------V-104F05-----------------------------
INT 10 - VESA SuperVGA BIOS - CPU VIDEO MEMORY CONTROL
        AX = 4F05h
        BH = subfunction
            00h select video memory window
                DX = window address in video memory (in granularity units)
            01h get video memory window
                Return: DX = window address in video memory (in gran. units)
        BL = window number
            00h window A
            01h window B
Return: AL = 4Fh if function supported
        AH = status
            00h successful
            01h failed
Note:   when using an accelerated video mode under VBE/AF v1.0P, the
          application must call EnableDirectAccess before switching banks if
          bit 9 of the video mode attributes flag is set (see #00080)
BUG:    Phoenix S3 Trio64V+ v1.02-02 reportedly returns garbage in DX for
          subfunction 01h
SeeAlso: AX=4F01h,AX=4F06h,AX=4F07h,AX=7000h/BX=0004h
--------V-104F06-----------------------------
INT 10 - VESA SuperVGA BIOS v1.1+ - GET/SET LOGICAL SCAN LINE LENGTH (PIXELS)
        AX = 4F06h
        BL = subfunction
            00h set scan line length
                CX = desired width in pixels
            01h get scan line length
Return: AL = 4Fh if function supported
        AH = status
            00h successful
            01h failed
        BX = bytes per scan line
        CX = number of pixels per scan line
        DX = maximum number of scan lines
Notes:  if the desired width is not achievable, the next larger width will be
          set
        the scan line may be wider than the visible area of the screen
        this function is valid in text modes, provided that pixel values are
          multiplied by the character cell width/height
SeeAlso: AX=4F01h,AX=4F05h,AX=4F06h/BL=02h,AX=4F06h/BL=03h,AX=4F07h
--------V-104F06BL02-------------------------
INT 10 - VESA SuperVGA BIOS v2.0+ - SET LOGICAL SCAN LINE LENGTH (BYTES)
        AX = 4F06h
        BL = 02h
        CX = desired scanline width in bytes
Return: AL = 4Fh if function supported
        AH = status
            00h successful
            01h failed
        BX = bytes per scan line
        CX = number of pixels per scan line
        DX = maximum number of scan lines
Notes:  if the desired width is not achievable, the next larger width will be
          set
        the scan line may be wider than the visible area of the screen
        this function is valid in text modes, provided that pixel values are
          multiplied by the character cell width/height
SeeAlso: AX=4F01h,AX=4F05h,AX=4F06h,AX=4F06h/BL=03h,AX=4F07h
--------V-104F06BL03-------------------------
INT 10 - VESA SuperVGA BIOS v2.0+ - GET MAXIMUM SCAN LINE LENGTH
        AX = 4F06h
        BL = 03h
Return: AL = 4Fh if function supported
        AH = status
            00h successful
            01h failed
        BX = maximum bytes per scan line
        CX = maximum number of pixels per scan line
Notes:  this function is valid in text modes, provided that pixel values are
          multiplied by the character cell width/height
SeeAlso: AX=4F01h,AX=4F05h,AX=4F06h,AX=4F06h/BL=02h,AX=4F07h
--------V-104F07-----------------------------
INT 10 - VESA SuperVGA BIOS v1.1+ - GET/SET DISPLAY START
        AX = 4F07h
        BL = subfunction
            00h,80h set display start
                CX = leftmost displayed pixel in scan line
                DX = first displayed scan line
            01h get display start
                Return: BH = 00h
                        CX = leftmost displayed pixel in scan line
                        DX = first displayed scan line
        BH = 00h (reserved)
Return: AL = 4Fh if function supported
        AH = status
            00h successful
            01h failed
Notes:  this function is valid in text modes, provided that values are
          multiplied by the character cell width/height
        subfunction 80h waits until vertical retrace before changing the
          display start address (VBE v2.0+)
SeeAlso: AX=4F01h,AX=4F05h,AX=4F06h
--------V-104F08-----------------------------
INT 10 - VESA SuperVGA BIOS v1.2+ - GET/SET DAC PALETTE CONTROL
        AX = 4F08h
        BL = subfunction
            00h set DAC palette width
                BH = desired number of bits per primary color
            01h get DAC palette width
Return: AL = 4Fh if function supported
        AH = status
            00h successful
            01h failed
        BH = current number of bits per primary (06h = standard VGA)
--------V-104F09-----------------------------
INT 10 - VESA SuperVGA BIOS v2.0+ - GET/SET PALETTE ENTRIES
        AX = 4F09h
        BL = subfunction
            00h set (primary) palette
            01h get (primary) palette
            02h set secondary palette data
            03h get secondary palette data
            80h set palette during vertical retrace
        CX = number of entries to change
        DX = starting palette index
        ES:DI -> palette buffer (see #00086)
Return: AL = 4Fh if function supported
        AH = status
            00h successful
            01h failed
SeeAlso: AX=4F0Ah,AX=D000h"S3VBE"

Format of VESA VBE palette entry:
Offset  Size    Description     (Table 00086)
 00h    BYTE    red
 01h    BYTE    green
 02h    BYTE    blue
 03h    BYTE    alpha or alignment byte
--------V-104F0ABL00-------------------------
INT 10 - VESA SuperVGA BIOS v2.0+ - GET PROTECTED-MODE INTERFACE
        AX = 4F0Ah
        BL = 00h
Return: AL = 4Fh if function supported
        AH = status
            00h successful
                ES:DI -> protected-mode table (see #00087)
                CX = length of table in bytes, included protected-mode code
            01h failed
SeeAlso: AX=4F00h,AX=4F05h,AX=4F07h,AX=4F09h

Format of VESA VBE 2.0 protected-mode table:
Offset  Size    Description     (Table 00087)
 00h    WORD    offset (within table) of protected-mode code for Function 5
                  (Set Window)
 02h    WORD    offset of protected-mode code for Function 7 (Set Disp Start)
 04h    WORD    offset of protected-mode code for Function 9 (Set Primary
                  Palette)
 06h    WORD    offset (within table) of list of I/O ports and memory locations
                  for which I/O privilege may be required in protected mode
                  (0000h if no list)
 08h    var     code and optional port/memory list
--------V-104F0A-----------------------------
INT 10 O - VESA SuperVGA BIOS v2.0 beta - GET PROTECTED-MODE CODE
        AX = 4F0Ah
        BX = function to be copied (see #00088)
Return: AL = 4Fh if function supported
        AH = status
            00h successful
                CX = number of bytes to copy
                ES:DI -> code for requested function
            01h failed
SeeAlso: AX=4F09h,AX=D000h"S3VBE"

(Table 00088)
Values for VESA VBE protected-mode function identifiers:
 0001h  set bank (see AX=4F05h)
 0002h  set display start (see AX=4F07h)
 0003h  set palette (see AX=4F09h)
--------V-104F0B-----------------------------
INT 10 - VESA SuperVBA BIOS - GET VBE/AF v1.0P DEVICE CONTEXT BUFFER
        AX = 4F0Bh
        BL = subfunction
            00h get length of device context buffer
            01h initialize device context buffer
                ES:DI -> real-mode address of buffer (see #00089)
Return: AL = 4Fh if function supported
        AH = status
            00h successful
                CX = number of bytes required for buffer (if BL=00h on entry)
                ES:DI buffer initialized (if BL=01h on entry)
            01h failed
Note:   this interface description is derived from the draft VBE/AF proposal
          (version 1.0P, document revsion 0.12P, dated 13jan95)
SeeAlso: AX=4F00h,AX=4F01h,AX=4F17h

Format of VBE/AF v1.0P Device Context buffer:
Offset  Size    Description     (Table 00089)
 00h    WORD    maximum X coordinate in frame buffer (0 = left edge)
                Note:   application must never pass X coordinate greater than
                          this value to the SetClipRect function (values are
                          NOT range-checked!)
 02h    WORD    maximum Y coordinate in frame buffer (0 = top edge)
                Note:   application must never pass Y coordinate greater than
                          this value to the SetClipRect function
 04h    DWORD   -> "SetForeColor" to set foreground color/mix (see #00091)
 08h    DWORD   -> "SetBackColor" to set background color/mix (see #00092)
 0Ch    DWORD   -> "SetClipRect" set hardware clipping rectangle (see #00093)
 10h    DWORD   -> function "DrawScan" to draw a single scan line
 14h    DWORD   -> function "DrawScanList" to draw a list of scan lines
 18h    DWORD   -> function "DrawRect" to draw a solid rectangle
 1Ch    DWORD   -> function "DrawLine" to draw a solid line
 20h    DWORD   -> function "DrawPattScan" to draw a patterned scan line
 24h    DWORD   -> function "BitBlt" to perform screen-to-screen BitBLT
 28h    DWORD   -> "TransBitBlt" to perform transparent screen-to-screen BitBLT
 2Ch    DWORD   -> "MonoBitBlt" to monochrome expansion screen-to-screen BitBLT
 30h    DWORD   -> function "SetCursor" to download hardware cursor image
 34h    DWORD   -> function "SetCursorPos" to set hardware cursor position
 38h    DWORD   -> function "SetCursorColor" to set hardware cursor color
 3Ch    DWORD   -> function "ShowCursor" to show/hide hardware cursor
 40h    DWORD   -> function "WaitTillIdle" to wait until graphics engine idle
 44h    DWORD   -> "EnableDirectAccess" to enable direct framebuffer access
 48h    DWORD   -> "DisableDirectAccess" to disable direct framebuffer access
 4Ch    DWORD   -> "BankSwitchCB" bank-switching callback function
                (set by application, may simply point at 32-bit VBE 2.0 bank
                  switching entry point)
 50h    WORD    "VidMemSel" selector for video memory (must be set by app)
 52h    WORD    "IOPortsOff" offset of I/O ports table in context buffer
 54h    WORD    "IOMemoryOff" offset of I/O memory table in context buffer
 56h    WORD    "IOMemSel1" selector for first I/O memory area specified by
                  I/O memory table (must be set by application)
 58h    WORD    "IOMemSel2" selector for second I/O memory area
 5Ah    WORD    "IOMemSel3" selector for third I/O memory area
 5Ch    WORD    "IOMemSel4" selector for fourth I/O memory area
 5Eh  N BYTEs   device-specific state buffer
      N WORDs   I/O port access table (list of ports, last entry is FFFFh)
      N DWORDs  I/O memory access table (list of physical-address/length pairs,
                  last entry is FFFFFFFFh)
      N BYTEs   32-bit code for VBE/AF v1.0P function
Notes:  all function pointers are offsets into the 32-bit code within the
          context buffer, and should be updated to point at the actual
          functions after the application has copied the buffer from the
          real-mode memory used for the interrupt call into its own flat-model
          memory space
        any functions which are not supported by the hardware have function
          pointers which are set to 00000000h initially

(Table 00090)
Values for VBE/AF v1.0P color mixing mode:
 00h    replace
 01h    XOR with existing pixel
 02h    OR with existing pixel
 03h    AND with existing pixel
SeeAlso: #00091,#00090

(Table 00091)
Call VBE/AF v1.0P function "SetForeColor" with:
        ES:EDI -> device context buffer (see #00089)
        EAX = new foreground color (format varies by video mode)
        BL = new foreground mixing mode (see #00090)
SeeAlso: #00089,#00092,#00107

(Table 00092)
Call VBE/AF v1.0P function "SetbackColor" with:
        ES:EDI -> device context buffer (see #00089)
        EAX = new background color (format varies by video mode)
        BL = new background mixing mode (see #00090)
SeeAlso: #00089,#00091,#00093

(Table 00093)
Call VBE/AF v1.0P function "SetClipRect" with:
        ES:EDI -> device context buffer (see #00089)
        EAX = left clipping coordinate
        EBX = top clipping coordinate
        ECX = right clipping coordinate
        EDX = bottom clipping coordinate
SeeAlso: #00089,#00092,#00094,#00107

(Table 00094)
Call VBE/AF v1.0P function "DrawScan" with:
        ES:EDI -> device context buffer (see #00089)
        EAX = X1 coordinate
        EBX = Y coordinate
        ECX = X2 coordinate
Desc:   draw a solid horizontal line from (X1,Y) to (X2,Y) in the currently-
          active foreground color and mix, omitting the pixel at the largest
          X coordinate
SeeAlso: #00089,#00093,#00095,#00098,#00107

(Table 00095)
Call VBE/AF v1.0P function "DrawScanList" with:
        ES:EDI -> device context buffer (see #00089)
        EAX = Y coordinate of first line
        EBX = length of scan list
        DS:ESI -> scanline list X coordinates (2N WORDs)
Desc:   draw multiple solid horizontal lines at successive Y coordinates,
          using the currently-active foreground color and mix, omitting the
          pixel at the largest X coordinate for each line
Note:   the scanline list consists of pairs of X coordinates; because the
          last pixel is omitted, a scanline will be skipped if X1==X2
SeeAlso: #00089,#00094,#00096,#00107

(Table 00096)
Call VBE/AF v1.0P function "DrawRect" with:
        ES:EDI -> device context buffer (see #00089)
        EAX = left coordinate
        EBX = top coordinate
        ECX = right coordinate
        EDX = bottom coordinate
Desc:   draw a solid rectangle in the currently-active foreground color and
          mix, omitting the rightmost X coordinate and bottom-most scan line
Note:   results are undefined if EAX>ECX or EBX>EDX; nothing will be drawn if
          EAX=ECX or EBX=EDX
SeeAlso: #00089,#00094,#00095,#00097

(Table 00097)
Call VBE/AF v1.0P function "DrawLine" with:
        ES:EDI -> device context buffer (see #00089)
        EAX = ??? (specified this way in the draft documentation!)
        EBX = ???
        ECX = ???
        EDX = ???
        ESI = ???
Desc:   draw a solid line in the currently-active foreground color and mix,
          given the Bresenham parameters
SeeAlso: #00089,#00094,#00096,#00098

(Table 00098)
Call VBE/AF v1.0P function "DrawPattScan" with:
        ES:EDI -> device context buffer (see #00089)
        EAX = X1 coordinate
        EBX = Y coordinate
        ECX = X2 coordinate
        DL = 8-bit stipple pattern
Desc:   draw a patterned horizontal line from (X1,Y) to (X2,Y) in the
          currently-active foreground color and mix, omitting the pixel at
          the largest X coordinate
Note:   for each pixel in the line, if DL bit (X mod 8) is set, the pixel is
          drawn, and left untouched if the bit is clear
SeeAlso: #00089,#00096,#00097,#00094,#00099,#00107

(Table 00099)
Call VBE/AF v1.0P function "BitBlt" with:
        ES:EDI -> device context buffer (see #00089)
        DS:ESI -> BitBlt parameter block (see #00100)
        BL = mix operation
            00h replace
            01h XOR
            02h OR
            03h AND
SeeAlso: #00089,#00094,#00098,#00101,#00107

Format of VBE/AF BitBlt parameter block:
Offset  Size    Description     (Table 00100)
 00h    WORD    left coordinate of source rectangle
 02h    WORD    top coordinate of source rectangle
 04h    WORD    right coordinate of source rectangle
 06h    WORD    bottom coordinate of source rectangle
 08h    WORD    left coordinate of destination rectangle
 0Ah    WORD    top coordinate of destination rectangle
 0Ch    BYTE    horizontal direction: 00h = decrement X, 01h = increment X
 0Dh    BYTE    vertical direction: 00h = decrement Y, 01h = increment Y
Notes:  the rightmost pixel(s) and bottom-most scan line are not copied
        the horizontal/vertical direction flags are used to ensure correct
          copies when the source and destination rectangles overlap
SeeAlso: #00099

(Table 00101)
Call VBE/AF v1.0P function "TransBitBlt" with:
        ES:EDI -> device context buffer (see #00089)
        DS:ESI -> BitBlt parameter block (see #00100)
        BL = mix operation
            00h replace
            01h XOR
            02h OR
            03h AND
        ECX = transparent color
Desc:   copy a rectangular area from one location to another, treating pixels
          with the specified color as transparent (leaving the destination
          unchanged)
SeeAlso: #00089,#00099,#00102,#00107

(Table 00102)
Call VBE/AF v1.0P function "MonoBitBlt" with:
        ES:EDI -> device context buffer (see #00089)
        DS:ESI -> BitBlt parameter block (see #00100)
        BL = mix operation
            00h replace
            01h XOR
            02h OR
            03h AND
        BH = bit-plane from which to read
Desc:   copy a rectangular area from one location to another, expanding a
          single bit of each source pixel
SeeAlso: #00089,#00099,#00101

(Table 00103)
Call VBE/AF v1.0P function "SetCursor" with:
        ES:EDI -> device context buffer (see #00089)
        DS -> application's data segment
        ESI -> 32x32 cursor data, in Windows 3.1 cursor-file format
                (32 DWORDs of XOR mask followed by 32 DWORDs of AND mask)
SeeAlso: #00089,#00094,#00104,#00105

(Table 00104)
Call VBE/AF v1.0P function "SetCursorPos" with:
        ES:EDI -> device context buffer (see #00089)
        EAX = cursor X coordinate
        EBX = cursor Y coordinate
        CL = cursor's X hotspot
        CH = cursor's Y hotspot
SeeAlso: #00089,#00103,#00105

(Table 00105)
Call VBE/AF v1.0P function "SetCursorColor" with:
        ES:EDI -> device context buffer (see #00089)
        AL = 8-bit color index, or color's Red value
        AH = color's Green value (16-bpp, 24-bpp, 32-bpp modes)
        BL = color's Blue value (16-bpp, 24-bpp, 32-bpp modes)
SeeAlso: #00089,#00103,#00104,#00106

(Table 00106)
Call VBE/AF v1.0P function "ShowCursor" with:
        ES:EDI -> device context buffer (see #00089)
        AL = new visibility (00h hide cursor, 01h show cursor)
SeeAlso: #00089,#00103,#00104,#00105

(Table 00107)
Call VBE/AF v1.0P function "WaitTillIdle" with:
        ES:EDI -> device context buffer (see #00089)
Desc:   pause until the hardware accelerator has completed all pending
          operations
SeeAlso: #00089,#00108,#00109

(Table 00108)
Call VBE/AF v1.0P function "EnableDirectAccess" with:
        ES:EDI -> device context buffer (see #00089)
SeeAlso: #00089,#00109,#00107,AX=4F05h,#00078,#00080

(Table 00109)
Call VBE/AF v1.0P function "DisableDirectAccess" with:
        ES:EDI -> device context buffer (see #00089)
SeeAlso: #00089,#00108
--------V-104F0C-----------------------------
INT 10 - VESA SuperVGA BIOS - RESERVED FOR FUTURE SVGA FUNCTIONS
        AX = 4F0Ch-4F0Fh
SeeAlso: AX=4F00h
--------V-104F0B-----------------------------
INT 10 - Diamond Viper V330 - ???
        AX = 4F0Bh
        ECX = ???
        ???
Return: AL = 4Fh if function supported
        AH = status
            00h successful
                ECX = ???
                ???
            01h failed
Note:   in BIOS v1.62, ECX is in multiples of 10000 (decimal) for both input
          and output, and this function never fails
--------p-104F10BL00-------------------------
INT 10 - VESA VBE/PM (Power Management) v1.0+ - GET CAPABILITIES
        AX = 4F10h
        BL = 00h
        ES:DI = 0000h:0000h (reserved for future use as pointer to info block)
Return: AL = 4Fh if function supported (installed)
        AH = call status
            00h successful
            else failed
        ---if successful---
        BL = VBE/PM version (bits 7-4: major, bits 3-0: minor)
        BH = supported states (see #00110)
        ES:DI unchanged
Index:  installation check;VESA VBE/Power Management|VESA DPMS
SeeAlso: AX=4F10h/BL=01h,AX=4F10h/BL=02h

Bitfields for VESA VBE/PM supported power states:
Bit(s)  Description     (Table 00110)
 0      standby
 1      suspend
 2      off
 3      reduced on
--------p-104F10BL01-------------------------
INT 10 - VESA VBE/PM (Power Management) v1.0+ - SET DISPLAY POWER STATE
        AX = 4F10h
        BL = 01h
        BH = new state (see #00111)
Return: AL = 4Fh if function supported
        AH = call status
            00h successful
            else failed
SeeAlso: AX=4F10h/BL=00h,AX=4F10h/BL=02h,AX=A00Ch

(Table 00111)
Values for VESA VBE/PM power state:
 00h    On
 01h    standby
 02h    suspend
 04h    Off
 08h    reduced On (for flat screens)
--------p-104F10BL02-------------------------
INT 10 - VESA VBE/PM (Power Management) v1.0+ - GET DISPLAY POWER STATE
        AX = 4F10h
        BL = 02h
Return: AL = 4Fh if function supported
        AH = call status
            00h successful
               BH = current power state (see #00111)
            else failed
SeeAlso: AX=4F10h/BL=00h,AX=4F10h/BL=01h,AX=A00Dh
--------V-104F11-----------------------------
INT 10 - VESA VBE/FP (Flat Panel Interface) - API
        AX = 4F11h
        BL = function
            00h installation check / get capabilities
        other registers vary by function
Return: varies by function
--------V-104F12-----------------------------
INT 10 - VESA VBE/CI (Cursor Interface) - API
        AX = 4F12h
        BL = function
        other registers vary by function
Return: varies by function
SeeAlso: AX=4F4Dh
--------s-104F13BX0000-----------------------
INT 10 - VESA VBE/AI (Audio Interface) - INSTALLATION CHECK
        AX = 4F13h
        BX = 0000h
Return: AL = 4Fh if function supported
            AH = status
                00h successful
                    BX = version (0010h for 1.00 -- note nonstandard value!)
                01h failed
SeeAlso: AX=4F13h/BX=0001h,AX=4F13h/BX=0005h
--------s-104F13BX0001-----------------------
INT 10 - VESA VBE/AI (Audio Interface) - LOCATE DEVICE
        AX = 4F13h
        BX = 0001h
        CX = 0000h ???
        DX = type of device
            0001h Wave device
            0002h MIDI device
            0003h Volume device
Return: AL = 4Fh if function supported
            AH = status
                00h successful
                    CX = handle [returned 1 for DX=1 and 3, and 2 for DX=2]
                01h failed
SeeAlso: AX=4F13h/BX=0000h,AX=4F13h/BX=0002h
--------s-104F13BX0002-----------------------
INT 10 - VESA VBE/AI (Audio Interface) - QUERY DEVICE
        AX = 4F13h
        BX = 0002h
        CX = handle
        DX = query
            0001h return length of GeneralDeviceClass
            0002h return copy   of GeneralDeviceClass (see #00112)
            0003h return length of Volume Info Structure
            0004h return copy   of Volume Info Structure (see #00122)
            0005h return length of Volume Services Structure
            0006h return copy   of Volume Services Structure (see #00124)
            0007h-000Fh reserved
            0010h-FFFFh device-specific
        SI:DI -> buffer (functions 0002h,0004h,0006h)
Return: AL = 4Fh if function supported
            AH = status
                00h successful
                    SI:DI = length (functions 1,3,5)
                    SI:DI buffer filled (functions 2,4,6)
                01h failed
Note:   functions 0003h to 0006h are only supported for the Volume device

Format of GeneralDeviceClass structure:
Offset  Size    Description     (Table 00112)
 00h    4 BYTEs name of the structure ("GENI")
 04h    DWORD   structure length
 08h    WORD    type of device (1=Wave, 2=MIDI)
 0Ah    WORD    version of VESA driver support (0100h for 1.00)
 10h    var     for CX=handle for Wave device:
                    Wave Info structure (see #00113)
                    some bytes ???
                for CX=handle for MIDI device:
                    MIDI Info Structure (see #00118)
                    first 8 bytes of MIDI Service Structure ???
SeeAlso: #00122,#00124

Format of WAVE Info Structure:
Offset  Size    Description     (Table 00113)
 00h    4 BYTEs name of the structure ("WAVI")
 04h    DWORD   structure length [0000007Eh]
 08h    DWORD   driver software version [00000003h]
 0Ch 32 BYTEs   vendor name, etc. (ASCIZ string)
 2Ch 32 BYTEs   vendor product name
 4Ch 32 BYTEs   vendor chip/hardware description
 6Ch    BYTE    installed board number
 6Dh    3 BYTEs unused data
 70h    DWORD   feature bits (see #00114)
 74h    WORD    user determined preference field
 76h    WORD    memory required for driver use [0200h]
 78h    WORD    number of timer tick callbacks per second [0000h]
 7Ah    WORD    channels: 1 = mono, 2 = stereo
                stereo is assumed to be interleaved data
 7Ch    WORD    bitfield of max sample sizes (see #00115)
SeeAlso: #00118

Bitfields for Wave feature bits:
Bit(s)  Description     (Table 00114)
 0      8000hz Mono Playback
 1      8000hz Mono Record
 2      8000hz Stereo Record
 3      8000hz Stereo Playback
 4      8000hz Full Duplex Play/Record
 5      11025hz Mono Playback
 6      11025hz Mono Record
 7      11025hz Stereo Record
 8      11025hz Stereo Playback
 9      11025hz Full Duplex Play/Record
 10     22050hz Mono Playback
 11     22050hz Mono Record
 12     22050hz Stereo Record
 13     22050hz Stereo Playback
 14     22050hz Full Duplex Play/Record
 15     44100hz Mono Playback
 16     44100hz Mono Record
 17     44100hz Stereo Record
 18     44100hz Stereo Playback
 19     44100hz Full Duplex Play/Record
 20-26  reserved (0)
 27     driver must pre-handle the data
 28     Variable Sample mono   playback
 29     Variable Sample stereo playback
 30     Variable Sample mono   record
 31     Variable Sample stereo record

(Table 00115)
Values for Sample data size:
 01h    8bit play
 02h    16bit play
 10h    8bit record
 20h    16bit record

Format of WAVE Audio Services structure:
Offset  Size    Description     (Table 00116)
 00h    4 BYTEs name of the structure
 04h    DWORD   structure length
 08h 16 BYTEs   for future expansion
---entry points (details???)---
 18h    DWORD   DeviceCheck
                11h compression (see also #00117)
                12h driver state
                13h get current pos
                14h sample rate
                15h set preference
                16h get DMA,IRQ
                17h get IO address
                18h get mem address
                19h get mem free
                1Ah full duplex
                1Bh get block size
                1Ch get PCM format
                1Dh enable PCM format
                80h-.. vendors can add DevChks above 0x80
 1Ch    DWORD   PCMInfo
 20h    DWORD   PlayBlock
 24h    DWORD   PlayCont
 28h    DWORD   RecordBlock
 2Ch    DWORD   RecordCont
 30h    DWORD   PauseIO
 34h    DWORD   ResumeIO
 38h    DWORD   StopIO
 3Ch    DWORD   WavePrepare
 40h    DWORD   WaveRegister
 44h    DWORD   GetLastError
                01h unsupported feature/function
                02h bad sample rate
                03h bad block length
                04h bad block address
                05h app. missed an IRQ
                06h don't understand the PCM size/format
                80h-.. vendors specific errors
 48h    DWORD   TimerTick
 4Ch    DWORD   ApplPSyncCB: CallBack: play filled in by the app
 50h    DWORD   ApplRSyncCB: CallBack: rec filled in by the app
SeeAlso: #00120,#00124

(Table 00117)
Values for type of compression:
 01h    IMA play
 02h    ALAW play
 03h    ULAW play
 11h    IMA record
 12h    ALAW record
 13h    ULAW record

Format of MIDI Info Structure:
Offset  Size    Description     (Table 00118)
 00h    4 BYTEs name of the structure ("MIDI")
 04h    DWORD   structure length
 08h    DWORD   driver software version [00000003h]
 0Ch 32 BYTEs   vendor name, etc. (ASCIZ string)
 2Ch 32 BYTEs   vendor product name
 4Ch 32 BYTEs   vendor chip/hardware description
 6Ch    BYTE    installed board number
 6Dh    3 BYTEs unused data
 70h 14 BYTEs   the patch library file name [OPL2.BNK 00..]
 7Eh    DWORD   feature bits (see #00119)
 80h    WORD    user determined preference field
 82h    WORD    memory required for driver use
 84h    WORD    # of timer tick callbacks per second
 86h    WORD    max # of tones (voices, partials)
SeeAlso: #00112,#00120,#00122

Bitfields for MIDI feature bits:
Bit(s)  Description     (Table 00119)
 0-3    reserved for GM extensions
 4      Transmitter/Receiver only
 5      Patches preloaded
 6      MIDI receive has time stamp
 8      MIDI interrupt driven input supported
 9      MIDI polled input supported
 10     MIDI remote patches supported

Format of MIDI Service structure:
Offset  Size    Description     (Table 00120)
 00h    4 BYTEs name of the structure ("MIDS")
 04h    DWORD   structure length
 08h 16 WORDs   patches loaded table bit field
 28h 16 BYTEs   for future expansion
---entry points (details???)---
 38h    DWORD   device check
                11h return available tones
                12h return TRUE/FALSE if patch is understood
                13h set preference
                14h allow/disallow voice stealing
                15h get FIFO sizes
                16h get DMA,IRQ
                17h get IO address
                18h get mem address
                19h get mem free
                80h-.. vendors can add DevChks above 0x80
 3Ch    DWORD   global reset
 40h    DWORD   MIDI msg
 44h    DWORD   poll MIDI
 48h    DWORD   preload patch
 4Ch    DWORD   unload patch
 50h    DWORD   timer tick
 54h    DWORD   get last error
                01h unsupported feature/function
                02h unknown patch type (see #00121)
                03h all tones are used
                04h messages are out of sync
                05h an incoming patch was incomplete
                06h an incoming patch couldn't be stored
                07h had to drop an incoming byte
                08h driver is failing a patch download
                80h-.. vendors specific errors
 58h    DWORD   Patch Block free callback
 5Ch    DWORD   MIDI byte avail. callback
SeeAlso: #00116,#00124

(Table 00121)
Values for MIDI Registered Patch Types:
 10h    OPL2
 11h    OPL3

Format of Volume Info Structure:
Offset  Size    Description     (Table 00122)
 00h  4 BYTEs   name of the structure ("VOLI")
 04h    DWORD   structure length (00000092h)
 08h    DWORD   driver software version [00000001h]
 0Ch 32 BYTEs   vendor name, etc. (ASCIZ string)
 2Ch 32 BYTEs   vendor product name
 4Ch 32 BYTEs   vendor chip/hardware description
 6Ch    BYTE    installed board number (0 for 1st/only board)
 6Dh  3 BYTEs   unused data (0)
 70h 24 BYTEs   text name of the mixer channel
 88h    DWORD   features bits (see #00123)
 8Ch    WORD    minimum volume setting
 8Eh    WORD    maximum volume setting
 90h    WORD    attenuation/gain crossover
SeeAlso: #00112,#00124

Bitfields for Volume feature bits:
Bit(s)  Description     (Table 00123)
 0      Stereo Volume control available
 2      Low Pass Filter is available
 3      High Pass Filter is available
 4      Parametric Tone Control is available
 5      selectable output paths
 8      Azimuth Field positioning supported
 9      Phi Field positioning supported
 10-30  unused???
 31     Master Volume device

Format of Volume Services Structure:
Offset  Size    Description     (Table 00124)
 00h    4 BYTEs name of the structure ("VOLS")
 04h    DWORD   structure length (00000038h)
 08h 16 BYTEs   16 bytes for future expansion (0)
---entry points (details???)---
 18h    DWORD   device check
                0011h filter range
                0012h filter setting
                0013h filter current
                0014h tone range
                0015h tone setting
                0016h tone current
                0017h path
                0018h get IO address
                0080h-.. vendors can add DevChks above 0x80
 1Ch    DWORD   set vol to an absolute setting
                01h User master volume setting
                02h application master volume setting
 20h    DWORD   set 3D volume
 24h    DWORD   tone control
 28h    DWORD   filter control
 2Ch    DWORD   output path
 30h    DWORD   reset channel
 34h    DWORD   get last error
                01h unsupported feature/function
                02h out of range parameter value
                80h+ vendor-specific errors
SeeAlso: #00116,#00120
--------s-104F13BX0003-----------------------
INT 10 - VESA VBE/AI (Audio Interface) - OPEN DEVICE
        AX = 4F13h
        BX = 0003h
        CX = handle
        DX = API set (16/32-bit)
        SI = segment ???
Return: AL = 4Fh if function supported
            AH = status
                00h successful
                    SI:CX -> memory ???
                01h failed
SeeAlso: AX=4F13h/BX=0000h,AX=4F13h/BX=0002h,AX=4F13h/BX=0004h
--------s-104F13BX0004-----------------------
INT 10 - VESA VBE/AI (Audio Interface) - CLOSE DEVICE
        AX = 4F13h
        BX = 0004h
        CX = handle
Return: AL = 4Fh if function supported
            AH = status
                00h successful
                01h failed
SeeAlso: AX=4F13h/BX=0000h,AX=4F13h/BX=0003h,AX=4F13h/BX=0005h
--------s-104F13BX0005-----------------------
INT 10 - VESA VBE/AI (Audio Interface) - UNINSTALL DRIVER
        AX = 4F13h
        BX = 0005h
Return: AL = 4Fh if function supported
            AH = status
                00h successful
                01h failed
SeeAlso: AX=4F13h/BX=0000h,AX=4F13h/BX=0006h
--------s-104F13BX0006-----------------------
INT 10 - VESA VBE/AI (Audio Interface) - DRIVER CHAIN/UNCHAIN
        AX = 4F13h
        BX = 0006h
Return: AL = 4Fh if function supported
            AH = status
                00h successful
                01h failed
SeeAlso: AX=4F13h/BX=0000h,AX=4F13h/BX=0005h
----------104F14-----------------------------
INT 10 - VESA OEM Extensions - API
        AX = 4F14h
        BL = function
            00h installation check / get capabilities
        other registers vary by function
Return: varies by function
Note:   this function is provided for OEMs to implement system-specific
          functionality in a VESA-compatible manner
----------104F14-----------------------------
INT 10 - VESA OEM Extensions - Matrox Millenium (BIOS v2.1)
        AX = 4F14h
        BL = function
            00h installation check / get capabilities
                ES:DI -> 256-byte buffer for Matrox-specific information
                        (see #00125)
                Return: ES:DI buffer filled
            01h read/write MGA indexed data register
                BH = direction (00h = write, else read)
                CL = register number (80h for most-recently used register)
                CH = new value, if writing
                Return: CH = current value, if reading
            02h read/write register in MGA control space
                BH = direction and size
                        bit 4: read register instead of writing
                        bits 1-0: data size (00 = BYTE, 01 = WORD, 10 = DWORD)
                SI = register address
                CL/CX/ECX = new value if writing
                Return: CL/CX/ECX = current value if reading
            03h read PINS byte
                SI = offset of byte within PINS data (see #00126)
                Return: CL = value of specified PINS byte
            04h ??? (related to PLL programming)
                DX = ???
                Return: CL,EDX destroyed
            05h read BIOS byte
                SI = offset of byte relative to start of BIOS image
                Return: CL = specified byte
            else
                Return: AX = FFFFh
Return: AL = 4Fh if function supported
            AH = status
                00h successful
                01h failed
Note:   most of this info is from http:\\grafi.ii.pw.edu.pl\gbm\matrox
SeeAlso: MEM C000h:7FFCh"Matrox"

Format of Matrox-specific VESA extensions information:
Offset  Size    Description     (Table 00125)
 00h  7 BYTEs   signature "VBE/MGA"
 07h 10 BYTEs   ??? (01h 01h 00h 00h 00h 00h 00h 00h 00h 07h)
 11h    WORD    BIOS version (high byte = major, low byte = one-digit minor)
 13h    DWORD   -> manufacturer name (ASCIZ "Matrox")
 17h    DWORD   -> ASCIZ card name
 1Bh    DWORD   -> ??? ASCIZ string (empty string on card examined)
 1Fh    DWORD   -> ASCIZ vendor name
 23h    DWORD   -> ASCIZ BIOS file base name
 27h    DWORD   -> PINS
 2Bh    WORD    video memory size in 64K units
 2Dh    DWORD   linear address of linear frame buffer
 31h    DWORD   linear address of MGA control aperture
 35h    WORD    PCI bus/device for card???
 37h 201 BYTEs  unused??? (cleared to 00h)

Format of Matrox PINS data (version 3.0):
Offset  Size    Description     (Table 00126)
 00h  2 BYTEs   signature ".A" (2Eh 41h)
 02h    BYTE    structure length (40h for v3.0)
 03h    BYTE    ???
 04h    WORD    PINS version (high byte = major, low byte = minor)
 06h    WORD    date last programmed
 08h    WORD    number of times programmed
 0Ah    WORD    flags
 0Ch  8 BYTEs   ASCII serial number, three letters + five digits
 14h  8 BYTEs   ???
 1Ch  4 BYTEs   ASCII card version
 20h    DWORD   PCB revision
 24h    BYTE    maximum RAMDAC frequency in MHz (less 100)
 25h    BYTE    maximum RAMDAC frequency???
 26h    BYTE    maximum RAMDAc frequency???
 27h    BYTE    ???
 28h    BYTE    ??? timing data?
 29h    BYTE    ???
 2Ah    BYTE    ???
 2Bh    BYTE    ???
 2Ch    BYTE    ???
 2Dh    BYTE    ???
 2Eh    BYTE    ???
 2Fh    BYTE    ???
 30h  4 BYTEs   ???
 34h    BYTE    ???
 35h    BYTE    ???
 36h    BYTE    ???
 37h    BYTE    memory size in 64K units
 38h    BYTE    ???
 39h    BYTE    ???
 3Ah    BYTE    ???
 3Bh    BYTE    ???
 3Ch    BYTE    ???
 3Dh    BYTE    ???
 3Eh    BYTE    ???
 3Fh    BYTE    checksum (to make sum of all bytes MOD 256 == 00h)
--------V-104F15BL00-------------------------
INT 10 - VESA VBE/DC (Display Data Channel) - INSTALLATION CHECK / CAPABILITIES
        AX = 4F15h
        BL = 00h
Return: AL = 4Fh if function supported
            AH = status
                00h successful
                    BX = ???
                01h failed
                    ???
SeeAlso: AX=4F15h/BL=01h,AX=4F15h/BL=02h
--------V-104F15BL01-------------------------
INT 10 - VESA VBE/DC (Display Data Channel) - READ EDID
        AX = 4F15h
        BL = 01h
        CX = 0000h
        DX = 0000h
        ES:DI -> 128-byte buffer for EDID record (see #00127)
Return: AL = 4Fh if function supported
            AH = status
                00h successful
                    ES:DI buffer filled
                01h failed (e.g. non-DDC monitor)
SeeAlso: AX=4F15h/BL=00h,AX=4F15h/BL=02h,I2C A0h"DDC"

Format of VESA EDID record:
Offset  Size    Description     (Table 00127)
 00h  8 BYTEs   padding (all FFh, or 00h FFh..FFh 00h)
 08h    WORD    big-endian manufacturer ID (see #00136)
                bits 14-10: first letter (01h='A', 02h='B', etc.)
                bits 9-5: second letter
                bits 4-0: third letter
 0Ah    WORD    EDID ID code -- identifies monitor model
 0Ch    DWORD   serial number or FFFFFFFFh
                for "MAG", subtract 7000000 to get actual serial number
                for "OQI", subtract 456150000
                for "PHL", subtract ???
                for "VSC", subtract 640000000
 10h    BYTE    week number of manufacture
 11h    BYTE    manufacture year - 1990
 12h    BYTE    EDID version
 13h    BYTE    EDID revision
 14h    BYTE    video input type (see #00129)
 15h    BYTE    maximum horizontal size in cm
 16h    BYTE    maximum vertical size in cm
 17h    BYTE    gamma factor (gamma = 1.0 + factor/100, so max = 3.55)
 18h    BYTE    DPMS flags (see #00128)
 19h    BYTE    chroma information: green X'/Y' and red X'/Y'
 1Ah    BYTE    chroma information: white X'/Y' and blue X'/Y'
 1Bh    BYTE    chroma information: red Y
 1Ch    BYTE    chroma information: red X
 1Dh    BYTE    chroma information: green Y
 1Eh    BYTE    chroma information: green X
 1Fh    BYTE    chroma information: blue Y
 20h    BYTE    chroma information: blue X
 21h    BYTE    chroma information: white Y
 22h    BYTE    chroma information: white X
 23h    BYTE    established timings 1 (see #00130)
 24h    BYTE    established timings 2 (see #00131)
 25h    BYTE    manufacturer's reserved timing or 00h for none
                bit 7: 1152x870 @ 75 Hz (Mac II, Apple)
 26h  8 WORDs   standard timing identification
                resolution (low byte) and vertical frequency (high byte) for
                  each of eight modes (see #00132)
                X resolution = (lowbyte + 31) * 8
 36h 18 BYTEs   detailed timing description #1 (see #00133)
                (v1.1) alternately, text identification (see #00135)
 48h 18 BYTEs   detailed timing description #2
                (v1.1) alternately, text identification (see #00135)
 5Ah 18 BYTEs   detailed timing description #3
                (v1.1) alternately, text identification (see #00135)
 6Ch 18 BYTEs   detailed timing description #4
                (v1.1) alternately, text identification (see #00135)
 7Eh    BYTE    unused???
 7Fh    BYTE    checksum
                (radix-complement: 256-low byte of 16-bit sum of 00h-7Eh)

Bitfields for DPMS EDID flags:
Bit(s)  Description     (Table 00128)
 2-0    unused???
 3      display type
        =0 non-RGB multicolor
        =1 RGB color
 4      unused???
 5      Active Off supported
 6      Suspend supported
 7      Standby supported
SeeAlso: #00127

Bitfields for DPMS input signal type:
Bit(s)  Description     (Table 00129)
 0      separate sync
 1      composite sync
 2      sync on green
 4-3    unused???
 6-5    voltage level
        00 0.700V/0.300V (1.00 Vp-p)
        01 0.714V/0.286V
        10 0.100V/0.400V
        11 reserved
 7      =1 digital signal, =0 analog
SeeAlso: #00127

Bitfields for DPMS established timings 1:
Bit(s)  Description     (Table 00130)
 0      720x400 @ 70 Hz (VGA 640x400, IBM)
 1      720x400 @ 88 Hz (XGA2)
 2      640x480 @ 60 Hz (VGA)
 3      640x480 @ 67 Hz (Mac II, Apple)
 4      640x480 @ 72 Hz (VESA)
 5      640x480 @ 75 Hz (VESA)
 6      800x600 @ 56 Hz (VESA)
 7      800x600 @ 60 Hz (VESA)
SeeAlso: #00127,#00131

Bitfields for DPMS established timings 2:
Bit(s)  Description     (Table 00131)
 0      800x600 @ 72 Hz (VESA)
 1      800x600 @ 75 Hz (VESA)
 2      832x624 @ 75 Hz (Mac II)
 3      1024x768 @ 87 Hz interlaced (8514A)
 4      1024x768 @ 60 Hz (VESA)
 5      1024x768 @ 70 Hz (VESA)
 6      1024x768 @ 75 Hz (VESA)
 7      1280x1024 @ 75 Hz (VESA)
SeeAlso: #00127,#00130

Bitfields for DPMS standard timing information:
Bit(s)  Description     (Table 00132)
 5-0    vertical refresh frequency - 60 (Hz)
 7-6    aspect ratio (Y resolution = X resolution * aspect ratio)
        00 ???
        01 0.75
        10 0.8
        11 0.5625
Note:   if both bytes of the timing are 00h or 01h, then the Standard Timing
          is "None"
SeeAlso: #00127

Format of Detailed Timing Description:
Offset  Size    Description     (Table 00133)
 00h    BYTE    horizontal frequency in kHz (if 00h, may be text)(see #00135)
 01h    BYTE    vertical frequency in Hz
 02h    BYTE    horizontal active time (pixels) and X resolution
 03h    BYTE    horizontal blanking time (pixels)
 04h    BYTE    horizontal active time 2 / horizontal blanking time 2
 05h    BYTE    vertical active time (lines) and Y resolution
 06h    BYTE    vertical blanking time (lines)
 07h    BYTE    vertical active time 2 / vertical blanking time 2
 08h    BYTE    horizontal sync offset (pixels)
 09h    BYTE    horizontal sync pulsewidth (pixels)
 0Ah    BYTE    vertical sync offset / vertical sync pulsewidth
 0Bh    BYTE    vertical/horizontal sync offset 2 / vert/hor. sync pulsewidth 2
 0Ch    BYTE    horizontal image size (mm)
 0Dh    BYTE    vertical image size (mm)
 0Eh    BYTE    horizontal image size 2 / vertical image size 2
 0Fh    BYTE    horizontal border (pixels)
 10h    BYTE    vertical border (lines)
 11h    BYTE    type of display (see #00134)
SeeAlso: #00127,#00135

Bitfields for EDID detailed display type:
Bit(s)  Description     (Table 00134)
 7      interlaced
 6-5    stereo mode
        00 normal display (no stereo)
        01 stereo, right stereo sync high
        10 stereo, left stereo sync high
        11 undefined
 4-3    sync type
        00 sync analog composite
        01 sync bipolar analog composite
        10 sync digital composite
        11 sync digital separate
---sync digital separate---
 2      vertical sync polarity (0 = negative, 1 = positive)
 1      horizontal sync polarity (0 = negative, 1 = positive)
---other sync types---
 2      serrate
 1      sync location (0 = on green, 1 = on RGB)
------
 0      not used???     
SeeAlso: #00133

Format of EDID Text Identification Strings:
Offset  Size    Description     (Table 00135)
 00h  3 BYTEs   00h 00h 00h (to distinguish from detailed timing description)
 03h    BYTE    text identifier
                FFh serial number
                FEh vendor name
                FDh vertical/horizontal frequency range
                FCh model name
---frequency range---
 04h    BYTE    00h ???
 05h    BYTE    minimum vertical refresh frequency in Hz
 06h    BYTE    maximum vertical refresh
 07h    BYTE    minimum horizontal frequency in kHz
 08h    BYTE    maximum horizontal frequency
 09h    BYTE    FFh ???
---other---
 04h 14 BYTEs   text, may be terminated with either a NUL (00h) or LF (0Ah)
SeeAlso: #00132

(Table 00136)
Values for manufacturer ID:
 "AOC"  AOC International (USA) Ltd. (see #00137)
 "API"  Acer (see #00138)
 "APP"  Apple Computer, Inc. (see #00139)
 "AST"  AST Research (see #00140)
 "CPL"  ALFA (see #00141)
 "CPQ"  COMPAQ (see #00142)
 "CTX"  CTX - Chuntex Electronic (see #00143)
 "DEC"  Digital Equipment Corporation (see #00144)
 "DEL"  Dell Computer Corp. (see #00145)
 "DPC"  Delta Electronics, Inc. (see #00146)
 "DWE"  Daewoo (see #00147)
 "ECS"  ELITEGROUP Computer Systems (see #00148)
 "EIZ"  EIZO (see #00149)
 "GSM"  LG Electronics Inc. (see #00158)
 "HEI"  Hyundai Electronics Industries Co., Ltd. (see #00150)
 "HIT"  Hitachi (see #00151)
 "HSL"  Hansol Electronics (see #00152)
 "HTC"  Hitachi Ltd. (see #00153)
 "HWP"  Hewlett Packard (see #00154)
 "IBM"  IBM PC Company (see #00155)
 "ICL"  Fujitsu ICL  (see #00156)
 "IVM"  Idek Iiyama North America, Inc. (see #00157)
 "LKM"  AZALEA
 "LNK"  LINK Technologies, Inc.
 "MAG"  MAG Technology Co., Ltd. (see #00159)
 "MAX"  Maxdata Computer GmbH
 "MEI"  Panasonic Comm. & Systems Co. (see #00168)
 "MEL"  Mitsubishi Electronics (see #00160)
 "MIR"  miro Computer Products AG (see #00161)
 "MTC"  MITAC
 "NAN"  NANAO (see #00162)
 "NEC"  NEC Technologies, Inc. (see #00163)
 "NOK"  Nokia (see #00164)
 "OQI"  OPTIQUEST (see #00165)
 "PGS"  Princeton Graphic Systems (see #00166)
 "PHL"  Philips Consumer Electronics Co. (see #00167)
 "REL"  Relisys
 "SAM"  Samsung (see #00169)
 "SDI"  Samtron (see #00170)
 "SNI"  Siemens Nixdorf
 "SNY"  Sony Corporation
 "TAT"  Tatung Co. of America, Inc. (see #00171)
 "TRL"  Royal Information Company (see #00172)
 "UNM"  Unisys Corporation
 "VSC"  ViewSonic Corporation (see #00173)
 "___"  Targa
SeeAlso: #00127

(Table 00137)
Values for AOC monitor EDID:
 A566h  AOC SPECTRUM 5Nlr
 A782h  AOC SPECTRUM 7Nlr
 D350h  AOC SPECTRUM 4V, 4VA, 4Vlr, 4VlrA
 D566h  AOC SPECTRUM 5Vlr, 5VlrA
 E570h  AOC SPECTRUM 5Glr
 E750h  AOC SPECTRUM 7DlrA
SeeAlso: #00136,#00138

(Table 00138)
Values for Acer monitor EDID:
 0037h  AcerView 55
 424Ch  AcerView 76ie
 440Bh  AcerView 11D
 4421h  AcerView 33D
 4522h  AcerView 7134e
 4536h  AcerView 7154e
 4538h  AcerView 7156e
 454Ch  AcerView 7176ie
 454Eh  AcerView 7178ie
 4938h  AcerView 7156i
 494Ch  AcerView 76i
 494Eh  AcerView 78i
 4962h  AcerView 98i
 4C21h  AcerView 33DL
 4C22h  AcerView 34TL
 4C37h  AcerView 55L
 4C38h  AcerView 56L
 4E4Ch  AcerView 76N
 5321h  AcerView 7133s
 5322h  AcerView 7134s
 5336h  AcerView 7154s
 5338h  AcerView 7156s, 7156is
 534Ch  AcerView 7176is
 5422h  AcerView 34T
SeeAlso: #00136,#00137,#00140

(Table 00139)
Values for Apple Computer monitor EDID:
 0352h  AppleVision 850
SeeAlso: #00136

(Table 00140)
Values for AST monitor EDID:
 8001h  ASTVision 4V
 8002h  ASTVision 4I
 8003h  ASTVision 4N
 8004h  ASTVision 4L
 8005h  ASTVision 5L
 8006h  ASTVision 7L
 8007h  ASTVision 7H
 8008h  ASTVision 20H
 8009h  AST Sabre
 800Ah  ASTVision 5V
SeeAlso: #00136,#00127,#00138,#00141

(Table 00141)
Values for ALFA monitor EDID:
 096Bh  ALFA TH-450
SeeAlso: #00136,#00140,#00142

(Table 00142)
Values for Compaq monitor EDID:
 0011h  COMPAQ 1024
 0012h  COMPAQ 1024
 0013h  COMPAQ 1024
 0014h  COMPAQ 1024
 0015h  COMPAQ 1024
 0016h  COMPAQ 1024
 0017h  COMPAQ PRB
 0018h  COMPAQ PRB
 0019h  COMPAQ PRB
 001Ah  COMPAQ PRB
 0020h  COMPAQ PRB
 0021h  COMPAQ PRB
 0022h  COMPAQ 151FS
 0023h  COMPAQ 151FS
 0024h  COMPAQ 151FS
 0025h  COMPAQ 151FS
 0026h  COMPAQ 151FS
 0027h  COMPAQ 151FS
 0028h  COMPAQ 151FS
 0029h  COMPAQ PRB
 002Ah  COMPAQ PRB
 002Bh  COMPAQ PRB
 002Ch  COMPAQ PRB
 002Dh  COMPAQ 171FS
 002Eh  COMPAQ 171FS
 002Fh  COMPAQ 171FS
 0030h  COMPAQ 171FS
 0031h  COMPAQ 171FS
 0032h  COMPAQ 171FS
 0033h  COMPAQ 171FS
 0040h  COMPAQ QVision 200
 0041h  COMPAQ QVision 200
 0042h  COMPAQ QVision 200
 0043h  COMPAQ QVision 200
 0044h  COMPAQ QVision 200
 0045h  COMPAQ QVision 200
 0046h  COMPAQ QVision 200
 0047h  COMPAQ QVision 200
 0048h  COMPAQ QVision 200
 0049h  COMPAQ QVision 200
 0100h  COMPAQ 1024
 0146h  COMPAQ 1024
 0147h  COMPAQ 1024
 0346h  COMPAQ 151FS
 0347h  COMPAQ 151FS
 0348h  COMPAQ 151FS
 0349h  COMPAQ 151FS
 034Ah  COMPAQ 151FS
 034Bh  COMPAQ 151FS
 0546h  COMPAQ 171FS
 0547h  COMPAQ 171FS
 0548h  COMPAQ 171FS
 0549h  COMPAQ 171FS
 0746h  COMPAQ PRB
 0747h  COMPAQ PRB
 0846h  COMPAQ PRA
 0847h  COMPAQ PRA
 0848h  COMPAQ PRA
 0849h  COMPAQ PRA
 084Ah  COMPAQ PRA
 084Bh  COMPAQ PRA
 084Ch  COMPAQ PRA
 084Dh  COMPAQ PRA
 0946h  COMPAQ PRB
 0947h  COMPAQ PRB
 0948h  COMPAQ PRB
 0949h  COMPAQ PRB
 0A46h  COMPAQ PRA
 0A47h  COMPAQ PRA
 0A48h  COMPAQ PRA
 0A49h  COMPAQ PRA
 0A4Ah  COMPAQ PRA
 0A4Bh  COMPAQ PRA
 0A4Ch  COMPAQ PRA
 0A4Dh  COMPAQ PRA
 0D46h  COMPAQ 140
 0D47h  COMPAQ 140
 0D48h  COMPAQ 140
 0D49h  COMPAQ 140
 0D4Ah  COMPAQ 140
 0D4Bh  COMPAQ 140
 0D4Ch  COMPAQ 140
 0D4Dh  COMPAQ 140
 0F46h  COMPAQ 150
 0F47h  COMPAQ 150
 0F48h  COMPAQ 150
 0F49h  COMPAQ 150
 0F4Ah  COMPAQ 150
 0F4Bh  COMPAQ 150
 0F4Ch  COMPAQ 150
 0F4Dh  COMPAQ 150
SeeAlso: #00136,#00141,#00143

(Table 00143)
Values for "CTX" monitor EDID:
 1451h  CTX 1451
 1551h  CTX 1551
 1562h  CTX 1562
 1565h  CTX 1565
 1569h  CTX 1569S 15-inch
 1765h  CTX 1765
 1785h  CTX 1785 XE
 2085h  CTX 2085
 2185h  CTX 2185
SeeAlso: #00136,#00142,#00144

(Table 00144)
Values for Digital Equipment Corporation monitor EDID:
 06FAh  Digital 21" Color (FR-PCXAV-WZ)
 073Ah  Digital 17" Color (FR-PCXAV-YZ)
 BA08h  Digital 15" Color Monitor (FR-PCXBV-E*)
 DA08h  Digital 17" Color Monitor (FR-PCXBV-F*)
SeeAlso: #00136,#00143,#00145

(Table 00145)
Values for Dell monitor EDID:
 139Ah  Dell Ultrascan 14XE
 139Bh  Dell Ultrascan 14XE
 139Ch  Dell Ultrascan 14XE
 139Dh  Dell Ultrascan 14XE
 2210h  Dell Ultrascan V17X
 2211h  Dell Ultrascan V17X
 2212h  Dell Ultrascan V17X
 2213h  Dell Ultrascan V17X
 2214h  Dell Ultrascan 21TE
 2215h  Dell Ultrascan 21TE
 2216h  Dell Ultrascan 21TE
 2217h  Dell Ultrascan 21TE
 3024h  Dell VS17X
 3025h  Dell VS17X
 3026h  Dell VS17X
 3027h  Dell VS17X
 4273h  Dell VS15X
SeeAlso: #00136,#00144,#00146

(Table 00146)
Values for Delta Electronics monitor EDID:
 0456h  Delta DA-456
 1565h  Delta DA-1565
 1765h  Delta DA-1765
SeeAlso: #00136,#00145,#00147

(Table 00147)
Values for Daewoo monitor EDID:
 1423h  Daewoo CMC-1423B1
 1427h  Daewoo CMC-1427X1
 1502h  Daewoo CMC-1502B1
 1505h  Daewoo CMC-1505X
 1507h  Daewoo CMC-1507X1
 1703h  Daewoo CMC-1703B
 5133h  Daewoo CMC-1511B
 7044h  Daewoo CMC-1704C
SeeAlso: #00136,#00146,#00148

(Table 00148)
Values for ELITEGROUP Computer Systems monitor EDID:
 0001h  ECS VERTOS 1401
 0002h  ECS VERTOS 1501
 0003h  ECS VERTOS 1502
 0004h  ECS VERTOS 1503
 0005h  ECS VERTOS 1700
 0006h  ECS VERTOS 1701
 0007h  ECS VERTOS 1700
 0008h  ECS VERTOS 2101
 0009h  ECS VERTOS 2102
SeeAlso: #00136,#00147,#00149

(Table 00149)
Values for EIZO monitor EDID:
 0200h  EIZO FlexScan F351
 0201h  EIZO FlexScan F553
 0202h  EIZO FlexScan F563
 0203h  EIZO FlexScan F764
 0204h  EIZO FlexScan F784
 0206h  EIZO FlexScan 6600
 0300h  EIZO FlexScan 6500
 0302h  EIZO 9060S
 0303h  EIZO 9065S
 0305h  EIZO FlexScan T563
 0306h  EIZO 9070S
 0307h  EIZO 9080i
 0308h  EIZO 9400i
 0309h  EIZO 9500
 030Ah  EIZO FlexScan F340iW
 030Ch  EIZO FlexScan F552
 030Dh  EIZO FlexScan F560iW
 030Fh  EIZO FlexScan F760iW
 0310h  EIZO FlexScan F780iW
 0311h  EIZO FlexScan T560i
 0312h  EIZO FlexScan T660i
 0313h  EIZO FlexScan T562
 0314h  EIZO FlexScan T662
 038Ch  EIZO FlexScan F550iW
SeeAlso: #00136,#00148,#00150

(Table 00150)
Values for Hyundai monitor EDID:
 0B42h  Hyundai Deluxscan 21       
 12F0h  Hyundai Deluxscan 14S   
 16D8h  Hyundai Deluxscan 15B   
 16E8h  Hyundai Deluxscan 15G   
 16EEh  Hyundai Delucscan 15G+  
 1E02h  Hyundai Deluxscan 17 Pro
 1EB8h  Hyundai Deluxscan 17B   
 1EBEh  Hyundai Deluxscan 17B+  
 5864h  Hyundai DeluxScan 15 Pro
 B81Eh  Hyundai DeluxScan 17
SeeAlso: #00136,#00149,#00151

(Table 00151)
Values for Hitachi monitor EDID:
 1717h  Hitachi Accuvue GX17L
 1727h  Hitachi HM1764
 1827h  Hitachi HM1782
 2147h  Hitachi HM4721
 2149h  Hitachi HM4921
 4020h  Hitachi HM4020
 4021h  Hitachi HM4021
 4711h  Hitachi Accuvue UX4721
 4810h  Hitachi Accuvue GX20
 4811h  Hitachi Accuvue GX21
 4820h  Hitachi HM4820
 4821h  Hitachi HM4821
 4830h  Hitachi Accuvue GX20H
 4911h  Hitachi Accuvue UX4921
 6421h  Hitachi HM6421
 6811h  Hitachi Accuvue UX6821
 6821h  Hitachi HM6821
SeeAlso: #00136,#00150,#00152

(Table 00152)
Values for Hansol Electronics monitor EDID:
 0579   Hansol Electronics Mazellan14px
 057A   Hansol Electronics Mazellan400A
 05DD   Hansol Electronics Mazellan15ax
 A605   Hansol Electronics Mazellan17px 
SeeAlso: #00136,#00151,#00153

(Table 00153)
Values for Hitachi, Ltd. monitor EDID:
 AB6Fh  CM-1711M
 ABC2h  CM-2112M
 ABC7h  CM-2111M
 ABCCh  CM-2110M
 ABE0h  Hitachi, Ltd CM802
 ABE2h  Hitachi, Ltd CM801
 ABE3h  Hitachi, Ltd CM800
 ABEAh  Hitachi, Ltd CM803
 ABF4h  Hitachi, Ltd CM701
 AFC8h  Hitachi, Ltd CM500
 AFD2h  Hitachi, Ltd CM600
 AFD7h  Hitachi, Ltd CM611
SeeAlso: #00136,#00152,#00154

(Table 00154)
Values for Hewlett-Packard monitor EDID:
 0AF0h  HP D2800A Ultra VGA 1600 21"
 0AF6h  HP D2806A Ergo Ultra VGA 15"
 0AF8h  HP D2808 1024 Low Emission
 0AFFh  HP D2815A 1024 Low Emission 14"
 0F11h  HP D3857A Multi Media 15"
 0F12h  HP D3858A Multi Media 14"
SeeAlso: #00136,#00151,#00155

(Table 00155)
Values for IBM monitor EDID:
 198Eh  IBM G41
 198Fh  IBM G50
 1990h  IBM G70
 1991h  IBM G200
 1999h  IBM P50
 199Ah  IBM P70
 199Bh  IBM P200
 1BB7h  IBM 7095
 1BB9h  IBM 7097
 2112h  IBM 2112
 2113h  IBM 2113
 2114h  IBM 2114
 2115h  IBM 2115
 2117h  IBM 2117
 2215h  IBM 2215
 2238h  IBM 2238
 2248h  IBM 2248
 2264h  IBM 2264
 2535h  IBM 9525-0X1
 26ACh  IBM Aptiva 9900
 27ADh  IBM Aptiva 9901
 6312h  IBM 6312
 6314h  IBM 6314
 6315h  IBM 6315
 6317h  IBM 6317
 6319h  IBM 6319
 6321h  IBM 6321
 6322h  IBM 6322
 6324h  IBM 6324
 6325h  IBM 6325
 6327h  IBM 6327
 8504h  IBM 8504
 8511h  IBM 8511
 8512h  IBM 8512
 8513h  IBM 8513
 8514h  IBM 8514
 8515h  IBM 8515
 8517h  IBM 8517
 8518h  IBM 8518
 9504h  IBM 9504
 9515h  IBM 9515
 9517h  IBM 9517
 9518h  IBM 9518
 9521h  IBM 9521
 9524h  IBM 9524
 9525h  IBM 9525
 9527h  IBM 9527
SeeAlso: #00136,#00154,#00156

(Table 00156)
Values for Fujitsu ICL monitor EDID:
 0100h  Fujitsu ICL ErgoPro 211v
 0200h  Fujitsu ICL ErgoPro 171p
 0400h  Fujitsu ICL ErgoPro 171v
 0700h  Fujitsu ICL ErgoPro 151p
 0800h  Fujitsu ICL ErgoPro 151p AutoBrite
 0A00h  Fujitsu ICL ErgoPro 151v
 0B00h  Fujitsu ICL ErgoPro 141v
 0D00h  Fujitsu ICL ErgoPro 141p
 0F00h  Fujitsu ICL ErgoPro 152v
 1400h  Fujitsu ICL ErgoPro 142v
 1600h  Fujitsu ICL ErgoPro e153
 1900h  Fujitsu ICL ErgoPro x173
 1A00h  Fujitsu ICL ErgoPro x173a
 1C00h  Fujitsu ICL ErgoPro x152
 1D00h  Fujitsu ICL ErgoPro e173
 2200h  FUJITSU ErgoPro e154
 2400h  FUJITSU ErgoPro x174
SeeAlso: #00136,#00155,#00157

(Table 00157)
Values for Idek Iiyama North America monitor EDID:
 1700h  Iiyama Vision Master MF-8617
SeeAlso: #00136,#00156,#00158

(Table 00158)
Values for LG Electronics monitor EDID:
 36B4h  LG StudioWorks 44m
 36B9h  LG StudioWorks 44i
 3AA0h  LG 1505s
 3AA2h  LG StudioWorks 56m
 3AAFh  LG StudioWorks 56T 15-inch
 3AB0h  LG StudioWorks 5D
 3AB6h  LG StudioWorks 5D
 426Ch  LG StudioWorks 78i
 426Dh  LG StudioWorks 78T
 426Eh  LG StudioWorks 76i
 4273h  LG StudioWorks 76m
 4274h  LG StudioWorks 78m
 4277h  LG StudioWorks 74m
 4278h  LG StudioWorks 74i
 427Eh  LG StudioWorks 7D
 427Fh  LG StudioWorks 78D
 4280h  LG StudioWorks 78DT
 4281h  LG StudioWorks 7DT
 4284h  LG StudioWorks 76T
 42CFh  LG 1725s
 4E21h  LG StudioWorks 20i
SeeAlso: #00136,#00157,#00159

(Table 00159)
Values for MAG monitor EDID:
 5620h  DX1595
 5624h  DX15T
 5626h  DX1795
SeeAlso: #00136,#00158,#00160

(Table 00160)
Values for Mitsubishi monitor EDID:
 0040h  Mitsubishi Diamond Pro 21TX (THN-9105)
 2040h  Mitsubishi Diamond Scan 20H (FR-8905)
 2040h  Mitsubishi Diamond Pro 20X (FR-8905B)
 6140h  Mitsubishi Diamond Scan 17HX (FFF8705)
 8040h  Mitsubishi Diamond Pro 15H (SD-57xxC)
 4040h  Mitsubishi Diamond Pro 17TX (TFG-8705)
 408Fh  Mitsubishi Diamond Scan 15VX (SD58xx)
 40C0h  Mitsubishi Diamond Pro 87TXM (TFM8705)
SeeAlso: #00136,#00159,#00161

(Table 00161)
Values for Miro monitor EDID:
 0721h  PROOFSCREEN miroC21107
 6815h  miroD1568
 6817h  PROOFSCREEN miroC1768
 6917h  miroD1769
 8217h  PROOFSCREEN miroC1782
 8520h  PROOFSCREEN miroC2085 E
 8521h  PROOFSCREEN miroC2185
 9321h  PROOFSCREEN miroC2193
SeeAlso: #00136,#00160,#00162

(Table 00162)
Values for Nanao monitor EDID:
 0000h  NANAO USA FlexScan T2-20
 0400h  NANAO USA F2-15
 0401h  NANAO USA F2-17
 0402h  NANAO USA F2-17EX
 0403h  NANAO USA F2-21
 0404h  NANAO USA FX2-21
 0405h  NANAO USA FlexScan T2-17TS
 0406h  NANAO FlexScan 6600
 0502h  NANAO 9060S
 0503h  NANAO 9065S
 0506h  NANAO 9070U
 0507h  NANAO 9080i
 0508h  NANAO 9400i
 0509h  NANAO 9500
 050Ah  NANAO FlexScan F340iW
 050Bh  NANAO FlexScan F550i
 050Ch  NANAO FlexScan F550iW
 050Dh  NANAO FlexScan F560iW
 050Eh  NANAO FlexScan F750i
 050Fh  NANAO FlexScan F760iW
 0510h  NANAO FlexScan F780iW
 0511h  NANAO FlexScan T560i
 0512h  NANAO FlexScan T660i
 0513h  NANAO USA FlexScan T2-17
 0514h  NANAO USA FlexScan T2-20
 0580h  NANAO USA FlexScan 6300
 0800h  NANAO FlexScan 33F
 0802h  NANAO FlexScan 88F
 0805h  NANAO FlexScan 54T
 0882h  NANAO FlexScan 52F
 0900h  NANAO FlexScan 6500
 0902h  NANAO 9060S
 0906h  NANAO 9070U
 0907h  NANAO 9080i
 090Ah  NANAO FlexScan F347
 090Bh  NANAO FlexScan F550i
 090Ch  NANAO FlexScan F557
 090Fh  NANAO FlexScan 77F
 0910h  NANAO FlexScan F780iJ
 0911h  NANAO FlexScan T560iJ
 0912h  NANAO FlexScan T660iJ
 0913h  NANAO FlexScan 56T
 0914h  NANAO FlexScan 68T
 098Ah  NANAO FlexScan F347II
 098Ch  NANAO FlexScan 55F
 098Fh  NANAO FlexScan 76F
 0991h  NANAO FlexScan T567
 0993h  NANAO FlexScan 53T
SeeAlso: #00136,#00161,#00163

(Table 00163)
Values for NEC monitor EDID:
 37FAh  NEC MultiSync XV14
 37FBh  NEC MultiSync XV14
 3A66h  NEC MultiSync C400
 3C00h  NEC MultiSync XE15
 3C0Ah  NEC MultiSync XP15
 3C14h  NEC MultiSync XV15
 3C1Eh  NEC MultiSync XE15
 3D5Eh  NEC MultiSync XV15+
 3D68h  NEC MultiSync M500
 3E4Eh  NEC MultiSync C500
 43A8h  NEC MultiSync XE17
 43B2h  NEC MultiSync XE17
 43BCh  NEC MultiSync XV17
 4416h  NEC MultiSync XP17
 533Eh  NEC MultiSync XE21
 53B6h  NEC MultiSync XP21
SeeAlso: #00136,#00162,#00164

(Table 00164)
Values for Nokia monitor EDID:
 008Dh  NOKIA 449M
 0098h  NOKIA 449X
 00A3h  NOKIA 447KC
 00A9h  NOKIA 447XI
 00ABh  NOKIA 447KA
 00ADh  NOKIA 447M
 00B7h  NOKIA 447W
 00B8h  NOKIA 447X
 00BBh  NOKIA 447XAV
 00BCh  NOKIA 447K
 00D2h  NOKIA 445R
SeeAlso: #00136,#00163,#00165

(Table 00165)
Values for OptiQuest monitor EDID:
 3138h  OPTIQUEST VA656
 3141h  OPTIQUEST 14ES
 3232h  OPTIQUEST 1562A-2
 3233h  OPTIQUEST 1769DC
 3234h  OPTIQUEST 1000S-2
 3332h  OPTIQUEST V655
 3333h  OPTIQUEST V775
 3432h  OPTIQUEST V650
 3832h  OPTIQUEST V665
 4637h  OPTIQUEST 1769DC
SeeAlso: #00136,#00164,#00166

(Table 00166)
Values for Princeton Graphics monitor EDID:
 003Bh  Princeton EO15
 003Dh  Princeton EO17
SeeAlso: #00136,#00165,#00167

(Table 00167)
Values for Philips monitor EDID:
 0200h  Philips CM0200 (15C)
 0500h  Philips CM0500 (20C)
 0700h  Philips CM0700 (20T)
 0800h  Philips CM0800 (15B)
 1200h  Philips CM1200 (15A)
 1800h  Philips CM1800 (15A)
 2000h  Philips CM0200 (14B)
 2600h  Philips 17TCM26
 2800h  Philips 17BCM28
 3800h  Philips 17ACM38
 5600h  Philips CM5600 (20B)
 700Bh  Philips CM0700 (21B)
 8000h  Philips CM0800 (14A)
SeeAlso: #00136,#00166,#00168

(Table 00168)
Values for Panasonic monitor EDID:
 1604h  Panasonic TX-D2151W-ES
 1610h  Panasonic TX-D2151NM
SeeAlso: #00136,#00167,#00169

(Table 00169)
Values for Samsung monitor EDID:
 0000h  Samsung SyncMaster 3Ne
 0100h  Samsung SyncMaster 4S
 1530h  Samsung 15GLsi
 4610h  Samsung SyncMaster 21GLs
 4690h  Samsung SyncMaster 20GLsi
 4D50h  Samsung SyncMaster 15GLe
 4D51h  Samsung SyncMaster 15GLi
 4D52h  Samsung SyncMaster 15M
 4D70h  Samsung SyncMaster 17GLi
 4D71h  Samsung SyncMaster 17GLsi
 4D72h  Samsung SyncMaster 6Ne
 4D73h  Samsung 17GLi
 4D74h  Samsung 17GLsi
 5450h  Samsung SyncMaster 15Me
 6D20h  Samsung SyncMaster 15GLe
SeeAlso: #00136,#00168,#00170

(Table 00170)
Values for Samtron monitor EDID:
 1428h  Samtron 428PT/PTL
 1528h  Samtron SC-528TXL
 1529h  Samtron SC-528UXL
 1530h  Samtron SC-528MXLJ
 4690h  Samtron SC-208DXL+
 4D70h  Samtron SC-728FXL
 4D71h  Samtron SC-726GXL
 5451h  Samtron SC-528MDL
SeeAlso: #00136,#00169,#00171

(Table 00171)
Values for Tatung monitor EDID:
 1F65h  Intelliscan TM651x series 15"
 1F67h  Intelliscan TM671x series 17"
 2F44h  Intelliscan TM442x series 14"
 2F45h  Intelliscan TM452x series 15"
 434Dh  Tatung CM-17MC
 4855h  Tatung CM-14UH
SeeAlso: #00136,#00170,#00172

(Table 00172)
Values for Royal Information Company monitor EDID:
 061Ch  TRL/RIC DL-1564
 0622h  TRL/RIC DH-1570
SeeAlso: #00136,#00171,#00173

(Table 00173)
Values for ViewSonic monitor EDID:
 0C00h  ViewSonic 17GS
 0C0Fh  ViewSonic 17PS
 0C1Fh  ViewSonic 17GA
 1600h  ViewSonic 21PS-2
 2601h  ViewSonic 15GS
 2600h  ViewSonic 15GS-2
 3141h  ViewSonic 14ES
 3142h  ViewSonic 14ES
 3143h  ViewSonic 14ES
 3145h  ViewSonic 15GS-3
 3252h  ViewSonic 21PS-2
 3253h  ViewSonic 21PS-2
 334Bh  ViewSonic 17GS-2
 334Ch  ViewSonic 17GS-2
 3351h  ViewSonic PT810
 344Bh  ViewSonic 17PS-2
 344Ch  ViewSonic 17PS-2
 3451h  ViewSonic PT810-2
 354Dh  ViewSonic GT800
 354Eh  ViewSonic GT800
 3550h  ViewSonic GT800
 3644h  ViewSonic 15GA
 3646h  ViewSonic 15GA
 3648h  ViewSonic 15GA
 364Ah  ViewSonic PT770
 364Bh  ViewSonic PT770
 364Ch  ViewSonic PT770
 3744h  ViewSonic 15G-2
 3746h  ViewSonic 15G-2
 3748h  ViewSonic 15G-2
 374Bh  ViewSonic 17GA
 374Ch  ViewSonic 17GA
 3844h  ViewSonic 15ES-2
 3846h  ViewSonic 15ES-2
 3848h  ViewSonic 15ES-2
 384Ah  ViewSonic 17EA
 384Bh  ViewSonic 17EA
 384Ch  ViewSonic 17EA
 3944h  ViewSonic 15GS-2
 3946h  ViewSonic 15GS-2
 3948h  ViewSonic 15GS-2
 394Ah  ViewSonic 17GS-2
 394Bh  ViewSonic 17GS-2
 394Ch  ViewSonic 17GS-2
 424Ah  ViewSonic GT770
 424Bh  ViewSonic GT770
 424Ch  ViewSonic GT770
 434Ah  ViewSonic 17PS-2
 434Bh  ViewSonic 17PS-2
 434Ch  ViewSonic 17PS-2
 4439h  ViewSonic 15GS-2
 444Ah  ViewSonic 17GA-2
 4637h  ViewSonic 1769DC
SeeAlso: #00136,#00172
--------V-104F15BL02-------------------------
INT 10 - VESA VBE/DC (Display Data Channel) - READ VDIF
        AX = 4F15h
        BL = 02h
        ???
Return: AL = 4Fh if function supported
            AH = status
                00h successful
                    ???
                01h failed
SeeAlso: AX=4F15h/BL=00h,AX=4F15h/BL=01h
--------V-104F16-----------------------------
INT 10 - VESA VBE/GC (Graphics System Configuration) - API
        AX = 4F16h
        BL = function
            00h installation check / get capabilities
        other registers vary by function
Return: varies by function
--------V-104F17-----------------------------
INT 10 - VESA VBE/AF (Accelerator Functions) - API
        AX = 4F17h
        BL = function
            00h installation check / get capabilities
        other registers vary by function
Return: AL = 4Fh if function supported
            AH = status
                00h successful
                01h failed
                02h hardware does not support function
                03h function not available in current video mode
                else reserved for future error codes
        other vary by function
Notes:  the accelerator function code should be given a 32-bit protected
          mode stack which has at least 1024 bytes available for use by the
          VBE/AF code
        when called, the I/O permission bitmap must allow access to any
          ports which VBE/AF may require for operation
SeeAlso: AX=4F0Bh
--------V-104F4D-----------------------------
INT 10 - VESA - VIDEO CURSOR INTERFACE REQUEST
        AX = 4F4Dh
        BX = number of bytes available for VCI use
        DS:0000h -> buffer for VCI
        ES:DI -> VCI driver callback function
Return: AL = 4Fh if supported
            AH = status
                00h successful
                    BX = number of bytes used by VCI
                    ES:DI -> VCI request handler
                01h failed
Desc:   allow the VESA BIOS Extensions to cooperate with a pointing-device
          (typically mouse) driver
SeeAlso: AX=4F12h
--------V-104F70-----------------------------
INT 10 - Avance Logic - GET ADAPTER INFORMATION
        AX = 4F70h
Return: AX = 004Fh if successful
            BL = board information (see #00174)
            BH = board type???
                00h on ALG2101
                FFh otherwise
SeeAlso: AX=4F00h

Bitfields for Avance Logic board information:
Bit(s)  Description     (Table 00174)
 0-1    video RAM size
        00 256K
        01 512K
        10 1M
        11 2M
 2      ???
 3      slot size???
        =0 8-bit slot
        =1 16-bit slot
 4      unused
 5      set on ALG2228/AL2301
 6-7    unused
--------V-104FDD-----------------------------
INT 10 - ATI M64VBE.COM - GET RESIDENT SEGMENT
        AX = 4FDDh
Return: AX = CS of resident code
Program: M64VBE is a VESA VBE 2.0 driver TSR for ATI's Mach64 video chip
SeeAlso: AX=4FFFh/BX=364Dh"M64VBE",INT 60"M64VBE"
--------V-104FFF-----------------------------
INT 10 - VESA SuperVGA BIOS - Everex - TURN VESA ON/OFF
        AX = 4FFFh
        DL = new state (00h off, 01h on)
Return: AX = 0000h if successful
--------V-104FFF-----------------------------
INT 10 - Diamond Stealth 24 - SET/RESET DUAL DISPLAY MODE
        AX = 4FFFh
        BX = dual display mode
            00h reset
            01h set dual display, 32KB VGA test
            02h set dual display, 64KB VGA test
Return: AX = 4F00h if successful
            BX = number of scanlines off screen for test mode
--------V-104FFFBX364D-----------------------
INT 10 - ATI M64VBE.COM - UNINSTALL
        AX = 4FFFh
        BX = 364Dh ('6M')
        CX = 5634h ('V4')
Return: AX,DX,DS,ES destroyed
Program: M64VBE is a VESA VBE 2.0 driver TSR for ATI's Mach64 video chip
SeeAlso: AX=4FDDh"M64VBE",INT 60"M64VBE"
--------U-1050-------------------------------
INT 10 - SCROLOCK.COM - INSTALLATION CHECK
        AH = 50h
Return: BX = 1954h if installed
            AL = 00h if inactive, nonzero if active
Program: SCROLOCK is a utility supplied with System Enhancement Associates'
          ARC archiver
SeeAlso: AH=51h
--------J-105000-----------------------------
INT 10 - VIDEO - AX PC - SET SCREEN COUNTRY CODE
        AX = 5000h
        BX = country code
            0001h USA (English), 0051h Japan
Return: AL = status
            00h successful
            01h bad country code
            02h other error
SeeAlso: AX=5001h,INT 16/AX=5000h
--------J-105001-----------------------------
INT 10 - VIDEO - AX PC - GET SCREEN COUNTRY CODE
        AX = 5001h
Return: AL = status
            00h successful
                BX = country code
            02h error
SeeAlso: AH=00h,AX=5000h,INT 16/AX=5001h,INT 21/AH=38h
--------V-105049-----------------------------
INT 10 - VIDEO - SCREENR v1.55+ - API
        AX = 5049h ('PI')
        BX = function
            0000h installation check
            0001h lock mode
            0002h unlock mode
            0003h lock palette
            0004h unlock palette
Return: AX = 0000h if installed
            BX = TSR version (BH=major,BL=minor)
            CL = mode locking status
                00h mode not locked
                01h mode locked: INT 10/AH=00h disabled
            CH = palette locking status
                00h palette not locked
                01h palette locked, the following functions are disabled:
                        AX=1000h, AX=1001h, AX=1002h, AX=1010h, AX=1012h
Program: SCREENR is a TSR supplied with Patrick Ibbetson's SCREEN display
          utility.
Index:  installation check;SCREENR
--------U-1051-------------------------------
INT 10 - SCROLOCK.COM - ENABLE/DISABLE
        AH = 51h
        AL = state
            00h disable
            nonzero enable
Return: nothing
Program: SCROLOCK is a utility supplied with System Enhancement Associates'
          ARC file archiver
SeeAlso: AH=50h"SCROLOCK"
--------J-105100-----------------------------
INT 10 - VIDEO - AX PC - REGISTER EXTERNAL CHARACTER
        AX = 5100h
        BH = character width in bits (10h)
        BL = character height (10h)
        DX = character code (DH = F0h-F3h, DL=40h-7Eh,80h-FCh)
        ES:BP -> character bitmap
Return: AL = status (00h successful, 01h failed)
SeeAlso: AX=5101h,INT 1F"SYSTEM DATA"
--------J-105101-----------------------------
INT 10 - VIDEO - AX PC - READ CHARACTER
        AX = 5101h
        BH = character width in bits
        BL = character height
        DX = character code (DH = 00h if 8-bit character)
        ES:BP -> buffer for character bitmap
Return: AL = status (00h successful, 01h failed)
SeeAlso: AH=09h,AX=5100h
--------J-105200-----------------------------
INT 10 - VIDEO - AX PC - SET VIRTUAL TEXT RAM BUFFER
        AX = 5200h
        BX = segment of buffer
Return: nothing
SeeAlso: AX=5201h
--------J-105201-----------------------------
INT 10 - VIDEO - AX PC - GET VIRTUAL TEXT RAM BUFFER
        AX = 5201h
Return: BX = segment of buffer or 0000h if failed
SeeAlso: AX=8300h,AH=FEh
----------1053-------------------------------
INT 10 - Show Partner F/X v3.6 - START PRESENTATION
        AH = 53h
        DS:DX -> ASCIZ name of presentation file (no path, extension forced to
                .PR2)
Return: ???
SeeAlso: AH=55h
----------1055-------------------------------
INT 10 - Show Partner F/X v3.6 - UNINSTALL
        AH = 55h
Return: FXSHOW.EXE removed from memory
SeeAlso: AH=53h
--------V-105555-----------------------------
INT 10 - VIDEO - ATI EGA/VGA Wonder Super Switch - INSTALLATION CHECK
        AX = 5555h
Return: AX = AAAAh    if installed
        BX:CX -> ??? routine in SMS.COM resident portion
              -> data area (see #00175) in VCONFIG
Program: Super Switch (SMS.COM) is a video mode switch program supplied with
          ATI EGA Wonder. It also maps video mode 08h to 27h or 23h.
SeeAlso: INT 10/AH=00h,INT 14/AX=AA01h,INT 2F/AX=6400h
Index:  screen saver;ATI Wonder SMS.COM

Format of ATI Super Switch data area:
Offset  Size    Description     (Table 00175)
 00h    DWORD   original INT 09 vector
 04h    DWORD   original INT 10 vector
 08h    DWORD   original INT 1C vector
 0Ch    WORD    screen saver state, 0=off, 1=on
 0Eh    WORD    blanking interval in clock ticks
--------V-105F00-----------------------------
INT 10 - Chips & Technologies Extended BIOS - RETURN CHIP INFORMATION
        AX = 5F00h
Return: AL = 5Fh function supported
            BL = chip type (see #00176)
            BH = video memory size (see #00177)
            CX = miscellaneous information (see #00178)
SeeAlso: AX=5F01h

Bitfields for Chips&Technologies chip type:
Bit(s)  Description     (Table 00176)
 7-4    chip type
        0000: 82c451
        0001: 82c452 / 82c452A
        0010: 82c455
        0011: 82c453
        0100: 82c450
        0101: 82c456
        0110: 82c457
        0111: F65520
        1000: F65530 / F65525
        1001: F66510
        1010: ???
        1011: F64300 "Wingine DGX"
        1100: F65535/F65545 ???
        1101: F65540
        1110: ???
        1111: ???
 3-0    revision number
SeeAlso: #00177

(Table 00177)
Values for Chips&Technologies video memory size:
 00h    256KB
 01h    512KB
 02h    1MB
 03h    2MB
SeeAlso: #00176

Bitfields for Chips&Technologies miscellaneous information:
Bit(s)  Description     (Table 00178)
 0      DAC size (0=6-bit, 1=8-bit)
 1      system type (0=PC/AT, 1=PS/2)
 2      extended text modes supported by BIOS
 3      reserved
 4      extended graphics modes supported by BIOS
 5      reserved
 6      BIOS supports graphics cursor
 7      BIOS supports anti-aliased font
 8      BIOS supports pre-programmed emulation
 9      BIOS supports auto emulation
 10     BIOS supports variable mode set at cold boot
 11     BIOS supports variable mode set on warm boot
 12     BIOS supports emulation mode set at cold boot
 13     BIOS supports emulation mode set on warm boot
 14-15  reserved
--------V-105F00-----------------------------
INT 10 - VIDEO - Realtek RTVGA - RETURN CHIP VERSION
        AX = 5F00h
Return: AH = 00h, if successful
        AL = chip version (the same value that VTEST.EXE reads)
            00h RTG3103???
            01h RTG31030/RTG3105
            02h RTG3106???
            3Fh non-Realtek chip
BUG:    in v3.C10, AX=5F00h on return due to improper stack restoration code
SeeAlso: AX=5F01h"RTVGA"
--------V-105F01-----------------------------
INT 10 - Chips & Technologies Extended BIOS - SET PREPROGRAMMED EMULATION
        AX = 5F01h
        BL = emulation type (see #00179)
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
SeeAlso: AX=5F00h,AX=5F02h,AH=FFh"Oak"

(Table 00179)
Values for Chips&Technologies emulation type:
 00h,01h reserved
 02h    CGA
 03h    MDA
 04h    Hercules
 05h    EGA
 06h    VGA (disable emulation)
--------V-105F01-----------------------------
INT 10 - VIDEO - Realtek RTVGA - WRITE RTVGA BIOS STRING TO DESTINATION
        AX = 5F01h
        ES:DI -> zero-filled buffer for BIOS ID string
Return: AH = 00h if successful
        ES:DI -> ASCII signature "REALTEK VGA BIOS Version 3C.10"
BUG:    in v3.C10, AX=5F01h on return due to improper stack restoration code
SeeAlso: AX=5F00h"RTVGA",AX=5F02h"RTVGA"
--------V-105F02-----------------------------
INT 10 - Chips & Technologies Extended BIOS - AUTO EMULATION CONTROL
        AX = 5F02h
        BL = new state of autmatic emulation (00h enabled, 01h disabled)
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
SeeAlso: AX=5F01h,AX=5F03h
--------V-105F02-----------------------------
INT 10 - Chips & Technologies '64300' BIOS - SET CLOCK
        AX = 5F02h
        BH = what to set
            02h dot clock
                BL = speed in MHz (12-99)
            03h memory clock
                BL = speed in MHz (12-99)
            FFh default dot and memory clocks
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
SeeAlso: AX=5F00h"Chips",AX=5F03h"64300",AX=5F02h"65530"
--------V-105F02-----------------------------
INT 10 - Chips & Technologies '65530' BIOS - SET CLOCK
        AX = 5F02h
        BH = what to set
            02h dot clock
                BL = new clock speed (see #00180)
            03h memory clock
                BL = new clock speed (see #00180)
            04h set power-down register
                BL = new value for power-down register (bits 3-0 only)
            06h (404 clock chip) set control register
                BL = new vlaue for control register (bits 5-0 only)
            06h (404A/B/B-ES clock chips) set control register PWRDN1
                BL = new value for control register
            07h (404A/B/B-ES clock chips) set control register PWRDN1
                BL = new value for control register
            FFh default dot and memory clocks
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
SeeAlso: AX=5F01h,AX=5F02h"64300",AX=5FA0h,#00184

(Table 00180)
Values for C&T '65530' BIOS clock speed:
 00h    12 MHz
 01h    14 MHz
 02h    16 MHz
 03h    18 MHz
 04h    20 MHz
 05h    25 MHz
 06h    28 MHz
 07h    32 MHz
 08h    36 MHz
 09h    40 MHz
 0Ah    45 MHz
 0Bh    50 MHz
 0Ch    56 MHz
 0Dh    60 MHz
 0Eh    65 MHz
 0Fh    66 MHz
 15h    34 MHz
--------V-105F02-----------------------------
INT 10 - VIDEO - Realtek RTVGA - RETURN RTVGA ON-BOARD MEMORY SIZE
        AX = 5F02h
Return: AH = 00h, if successful
        AL = on-board memory size
             (00h = 256K, 01h = 512K, 02h = 768K, 03h = 1024K)
BUG:    in v3.C10, AX=5F02h on return due to improper stack restoration code
SeeAlso: AX=5F01h"RTVGA",AX=5F03h"RTVGA"
--------V-105F03-----------------------------
INT 10 - VIDEO - Realtek RTVGA - SET ???
        AX = 5F03h
        BL = 0-3 (???)
Return: AH = 00h if successful
BUG:    in v3.C10, AX=5F03h on return due to improper stack restoration code
SeeAlso: AX=5F02h"RTVGA"
--------V-105F03BL00-------------------------
INT 10 - Chips & Technologies Extended BIOS - SET POWER-ON DISPLAY MODE
        AX = 5F03h
        BL = 00h
        CL = display mode
        CH = mode (see #00181)
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
SeeAlso: AX=5F02h,AX=5F03h/BL=01h"Chips",AX=5F90h

Bitfields for Chips&Technologies display mode:
Bit(s)  Description     (Table 00181)
 1-0    scanlines (00 = 200, 01 = 350, 10 = 400)
 7      persistence (0 reset on next boot, 1 until changed)
--------V-105F03BH00-------------------------
INT 10 - Chips & Technologies '64300' BIOS - GET CLOCK SPEED
        AX = 5F03h
        BH = 00h (get default memory clock)
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
                    BL = clock speed in MHz
SeeAlso: AX=5F02h"64300",AX=5F04h"64300"
--------V-105F03BL01-------------------------
INT 10 - Chips & Technologies Extended BIOS - SET POWER-ON EMULATION MODE
        AX = 5F03h
        BL = 01h
        CL = emulation mode (see #00181)
        CH = permanence
            bit 7 persistence (0 reset on next boot, 1 until changed)
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
SeeAlso: AX=5F02h,AX=5F03h/BL=00h"Chips",AX=5F90h
--------V-105F04-----------------------------
INT 10 - Chips & Technologies '64300' BIOS - GET REFRESH RATE
        AX = 5F04h
        BL = video mode number
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
                    BH = available refresh rates (see #00182)
                    BL = currently-set refresh rate (see #00182)
SeeAlso: AX=5F03h"64300",AX=5F05h"64300"

Bitfields for C&T 64300 refresh rates:
Bit(s)  Description     (Table 00182)
 5      75 Hz
 4      72 Hz
 3      70 Hz
 2      60 Hz
 1      56 Hz
 0      interlaced
--------V-105F05-----------------------------
INT 10 - Chips & Technologies '64300' BIOS - SET REFRESH RATE
        AX = 5F05h
        BL = video mode number
        BH = refresh rate to set (see #00182)
                bit 7:  =0 program new clock and CRT parametes
                        =1 keep current parameters
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
SeeAlso: AX=5F04h"64300"
--------V-105F06-----------------------------
INT 10 - Chips & Technologies '64300' BIOS - GET XRAM INFORMATION
        AX = 5F06h
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
                    BL = XRAM presence (00h no XRAM, 01h present)
SeeAlso: AX=5F05h,AX=5F08h
--------V-105F08-----------------------------
INT 10 - Chips & Technologies '64300' BIOS - SET LINEAR MEMORY START ADDRESS
        AX = 5F08h
        BX = desired start address in megabytes
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
SeeAlso: AX=5F06h
--------V-105F10-----------------------------
INT 10 - Chips & Technologies '64300'/'65530' BIOS - GET LINEAR MEMORY INFO
        AX = 5F10h
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
                    BX:CX = linear memory base address
                    DX = virtual screen width offset (bytes)
                    SI;DI = linear memory size
SeeAlso: AX=5F08h,AX=5FA0h
--------V-105F50-----------------------------
INT 10 - Chips & Technologies Extended BIOS - GET LAPTOP DISPLAY STATUS
        AX = 5F50h
Return: DL = display status (see #00183)
Note:   this call can be used on Toshiba laptops since ~1995 instead of
          INT 42/AX=7503h which is no longer supported with the F655xx chips
SeeAlso: INT 42/AX=7503h

Bitfields for display status:
Bit(s)  Description     (Table 00183)
 7-4    always 0 ???
 3      1: both displays active (bit 1 also set)
 2      1: normal (monochrome display only), 0: inverse or color
 1      1: internal display active, 0: external only
 0      always set ???
--------V-105F50-----------------------------
INT 10 - Chips & Technologies '65530' BIOS - GET 655xx INFORMATION
        AX = 5F50h
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
                    BX = width of flat panel in pixels
                    CX = height of flat panel in pixels
                    DX = F65520/525/530 status (see #00184)
SeeAlso: AX=5F51h,INT 15/AX=5F31h

Bitfields for C&T F65520/525/530 status:
Bit(s)  Description     (Table 00184)
 15-0   reserved
 6-5    type of clock chip
        00 = 404
        01 = 404A
        10 = 404B ES
        11 = 404B
 4      accelerator enabled
 3      both displays active
 2      video polarity (1 = inverted)
 1      output device
        0 CRT
        1 flat panel (LCD)
 0      reserved
--------V-105F51-----------------------------
INT 10 - Chips & Technologies Extended BIOS - SWITCH DISPLAY DEVICE
        AX = 5F51h
        BL = new active display
            00h CRT
            01h flat panel (LCD)
            02h both simultaneously
        BH = 01h to allow reprogramming the DAC
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
SeeAlso: AX=5F50h,AX=5F53h
--------V-105F53-----------------------------
INT 10 - Chips & Technologies Extended BIOS - EN/DISABLE ACCELERATOR SUPPORT
        AX = 5F53h
        BL = new support state
            00h disable buffer/accelerator
            01h enable buffer/acelerator
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
SeeAlso: AX=5F50h,AX=5F51h,AX=5F54h
--------V-105F54-----------------------------
INT 10 - Chips & Technologies Extended BIOS - TURN FLAT PANEL ON/OFF
        AX = 5F54h
        BL = new state
            00h on
            01h off
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
SeeAlso: AX=5F50h,AX=5F51h,AX=5F53h,AX=5F5Ah
--------V-105F5A-----------------------------
INT 10 - Chips & Technologies Extended BIOS - SET FLAT-PANEL VIDEO POLARITY
        AX = 5F5Ah
        BL = new video polarity
            00h normal
            01h inverted
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
SeeAlso: AX=5F50h,AX=5F54h
--------V-105F5C-----------------------------
INT 10 - Chips & Technologies Extended BIOS - SET VERTICAL COMPENSATION
        AX = 5F5Ch
        BL = type of vertical compensation to use
            00h no compensation
            01h automatic centering
            02h set centering register
                DX = centering value (bits 9-0 only)
            03h non-automatic centering
            04h set vertical line insertion register
                DL = vertical line insertion (bits 3-0 only)
            05h set alternate maximum scanline register
                DL = alternate maximum scanline (bits 4-0 only)
            06h enable text stretching, type 0
            07h enable text stretching, type 1
            08h enable text stretching, type 2
            09h enable text stretching, type 3
            0Ah disable text stretching
            0Bh set vertical line replication register
                DL = vertical line replication (bits 3-0 only)
            0Ch enable graphics stretching, type 0
            0Dh enable graphics stretching, type 1
            0Eh disable vertical graphics stretching
            0Fh disable all horizontal and vertical compensation
            10h enable optimal compensation
            11h disable optimal compensation
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
SeeAlso: AX=5F50h,AX=5F5Eh,AX=5F5Fh
--------V-105F5E-----------------------------
INT 10 - Chips & Technologies Extended BIOS - EN/DISABLE TALL FONT LOADING
        AX = 5F5Eh
        BL = new state of tall-font loading
            00h enable loading  of 8x19/30/32 fonts
            01h disable loading of 8x19/30/32 fonts
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
Note:   when tall fonts are enabled, the fonts are stretched by duplicating
          scan lines as appropriate to convert an 8x16 font to the proper
          height (scan lines 1/9/12 [8x19] or 2-15 [8x30] or all [8x32])
SeeAlso: AX=5F5Ch,AX=5F5Fh
--------V-105F5F-----------------------------
INT 10 - Chips & Technologies Extended BIOS - HORIZONTAL COMPENSATION
        AX = 5F5Fh
        BL = horizontal compensation type
            00h none
            01h automatic centering
            02h set centering register
                DL = centering value
            03h non-automatic centering
            04h enable text compression (force 8xN fonts)
            05h disable text compression (allow 9xN fonts)
            06h enable auto doubling
            07h disable auto doubling
            0Fh disable all horizontal and vertical compensation
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
SeeAlso: AX=5F50h,AX=5FA0h
--------V-105F90-----------------------------
INT 10 - Chips & Technologies Extended BIOS - GET SUPERVGA STATE BUFFER SIZE
        AX = 5F90h
        CX = state mask (see #00185)
Return: AL = 5Fh if function supported
            BX = number of 64-byte blocks required
SeeAlso: AH=1Ch,AX=5F03h,AX=5F91h,AX=5F92h,AX=5FA0h

Bitfields for Chips&Technologies state mask:
Bit(s)  Description     (Table 00185)
 0      video hardware
 1      BIOS data state
 2      DAC state
 15     type (0 all state info, 1 SuperVGA state only)
--------V-105F91-----------------------------
INT 10 - Chips & Technologies Extended BIOS - SAVE SUPERVGA STATE
        AX = 5F91h
        CX = state mask (see #00185)
        ES:BX -> save buffer
Return: AL = 5Fh if function supported
            buffer at ES:BX filled
SeeAlso: AH=1Ch,AX=5F03h,AX=5F90h,AX=5F92h,AX=5FA1h
--------V-105F92-----------------------------
INT 10 - Chips & Technologies Extended BIOS - RESTORE SUPERVGA STATE
        AX = 5F92h
        CX = state mask (see #00185)
        ES:BX -> previously-filled save buffer
Return: AL = 5Fh if function supported
SeeAlso: AH=1Ch,AX=5F03h,AX=5F90h,AX=5F92h,AX=5FA2h
--------V-105FA0-----------------------------
INT 10 - Chips & Technologies Wingine DGX - GET EXTENDED BIOS SAVE BUFFER SIZE
        AX = 5FA0h
        CX = state(s) to be saved (see #00186)
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
                    BX = number of 64-byte blocks required for state
SeeAlso: AH=1Ch,AX=5FA1h,AX=5FA2h,AX=5F90h,AX=4F04h

Bitfields for C&T BIOS save/restore state type:
Bit(s)  Description     (Table 00186)
 0      video hardware
 1      BIOS data
 2      DAC and color registers
 14     (65530 BIOS with AL=A1h only) clear emulation state
 15     extended registers
SeeAlso: #00048,#00085
--------V-105FA1-----------------------------
INT 10 - Chips & Technologies Wingine DGX - SAVE VIDEO STATE
        AX = 5FA1h
        CX = state(s) to be saved (see #00186)
        ES:BX -> buffer for state information
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
                    ES:BX buffer filled
SeeAlso: AH=1Ch,AX=5FA0h,AX=5FA2h,AX=5F91h
--------V-105FA2-----------------------------
INT 10 - Chips & Technologies Wingine DGX - RESTORE VIDEO STATE
        AX = 5FA2h
        CX = state(s) to be restored (see #00186)
        ES:BX -> buffer containing previously-saved state information
Return: AL = 5Fh if function supported
            AH = status
                00h unsuccessful
                01h successful
SeeAlso: AH=1Ch,AX=5FA0h,AX=5FA1h,AX=5F92h
--------V-1060------------------------------------
INT 10 - HUNTER 16 - SET GRAPHICS FONT
        AH = 60h
        AL = new font
            bit 7    output characters in reverse video
            bits 0-6 font number (see #00200 at AH=77h)
Return: BH = cell width
        BL = cell height
Desc:   select the font to use for output in mode 6; this can be used to mix
          fonts on the screen
Note:   the Husky Hunter 16 is an 8088-based ruggedized laptop.  Other family
          members are the Husky Hunter, Husky Hunter 16/80, and Husky Hawk.
SeeAlso: AH=04h"HUNTER",AH=73h"HUNTER",AH=77h"HUNTER"
--------V-1061------------------------------------
INT 10 - HUNTER 16 - MOVE CURSOR TO GRAPHICS CO-ORDINATES
        AH = 61h
        CX = column
        DX = row
Return: nothing
Note:   this function is only valid in graphics modes
SeeAlso: AH=62h
--------V-1062------------------------------------
INT 10 - HUNTER 16 - GET CURSOR POSITION IN GRAPHICS CO-ORDINATES
        AH = 62h
Return: CX = column
        DX = row
Note:   this function is only valid in graphics modes
SeeAlso: AH=61h
--------V-1063------------------------------------
INT 10 - HUNTER 16 - SET CONTRAST
        AH = 63h
        AL = contrast (0..127)
Return: nothing
Desc:   set the LCD screen contrast to improve visibility
SeeAlso: AH=64h,AH=75h
--------V-1064------------------------------------
INT 10 - HUNTER 16 - SET BACKLIGHT LEVEL
        AH = 64h
        AL = level (0..15)
Return: nothing
Desc:   set the LCD backlight level to improve visibility in bad lighting
SeeAlso: AH=63h,AH=65h,AH=74h,AH=78h"HUNTER",INT 15/AH=74h
--------V-106500----------------------------------
INT 10 - HUNTER 16 - GET BACKLIGHT TIMEOUT
        AX = 6500h
Return: BX = timeout in seconds (0-300)
Desc:   returns the time after which the backlight will turn off
SeeAlso: AH=63h,AH=64h,AX=6501h,INT 15/AH=74h
--------V-106501----------------------------------
INT 10 - HUNTER 16 - SET BACKLIGHT TIMEOUT
        AX = 6501h
        BX = timeout in seconds (0-300)
Return: nothing
Desc:   set the idle time after which the backlight will turn off
SeeAlso: AH=64h,AX=6500h
--------V-1066------------------------------------
INT 10 - HUNTER 16 - SPLIT DISPLAY
        AH = 66h
        AL = control bits (see #00187)
        BH = top row of lower section of LCD (0..7)
        BL = top row of lower section of the virtual screen (0..24)
Return: nothing
Desc:   split the LCD screen horizontally into two parts; each part may be
          individually scrollable or fixed.
Note:   the Hunter 16 has a 240x64 LCD display which serves as a window into
          a 640x200 virtual screen

Bitfields for HUNTER 16 control bits:
Bit(s)  Description     (Table 00187)
 0-1    01: no split, 10: allow split
 2      allow scrolling the upper part
 3      allow scrolling the lower part
--------V-106A00BX0000-----------------------
INT 10 - Direct Graphics Interface Standard (DGIS) - INQUIRE AVAILABLE DEVICES
        AX = 6A00h
        BX = 0000h
        CX = 0000h
        DX = buffer length (may be 0)
        ES:DI -> buffer
Return: BX = number of bytes stored in buffer
        CX = bytes required for all descriptions (0 if no DGIS)
Note:   buffer contains descriptions and addresses of DGIS-compatible
          display(s) and printer(s)
SeeAlso: AX=6A02h
--------V-106A01CX0000-----------------------
INT 10 - Direct Graphics Interface Standard (DGIS) - REDIRECT CHARACTER OUTPUT
        AX = 6A01h
        CX = 0000h
        ES:DI = address of device to send INT 10 output to
Return: CX = 0000h  output could not be redirected
             else INT 10h output now routed to requested display
SeeAlso: AX=6A02h
--------V-106A02-----------------------------
INT 10 - DGIS - INQUIRE INT 10 OUTPUT DEVICE
        AX = 6A02h
        ES:DI = 0000h:0000h
Return: ES:DI = 0000h:0000h  if current display is non-DGIS
                else address of the current DGIS INT 10 display
SeeAlso: AX=6A00h,AX=6A01h
--------V-106D74-----------------------------
INT 10 - MTRFONTS - INSTALLATION CHECK
        AX = 6D74h ('mt')
        DS:0104h = signature "MtRfOnTs"
Return: AX = 4D54h ('MT') if installed
            ES = PSP segment of resident code
Program: MTRFONTS is a shareware TSR (part of the MTR package) by Mechon Mamre
          which provides Hebrew screen fonts
SeeAlso: INT 16/AX=6D74h"MTRTSR"
--------V-106E00-----------------------------
INT 10 - Paradise VGA internal - GET ???
        AX = 6E00h
Return: BX = 5744h ('WD') if supported
            DH:AH:AL = last three ASCII digits of ROM serial number
            CL = ???
            CH = ???
SeeAlso: AX=6E04h,AX=6E05h
--------V-106E04-----------------------------
INT 10 - Paradise VGA internal - GET SCREEN SIZE AND ???
        AX = 6E04h
Return: BX = screen width (columns)
        CX = screen height (lines)
        AH = ??? (05h or FFh)
        AL = ??? (04h or video mode)
SeeAlso: AX=6E00h,AX=6E05h
--------V-106E05-----------------------------
INT 10 - Paradise VGA internal - SET MODE
        AX = 6E05h
        BL = mode
Return: nothing
Note:   like AH=00h, AL=BL.
SeeAlso: AH=00h,AX=6E00h,AX=6E04h,AX=6F05h
--------V-106F00-----------------------------
INT 10 - HP Vectra EX-BIOS - INSTALLATION CHECK
        AX = 6F00h
        BX <> 4850h (usually set to 0000h for simplicity)
Return: BX = 4850h ('HP') indicates HP Extended BIOS video functions present
        AX destroyed
SeeAlso: AX=6F00h"Video7",AX=6F01h,AX=6F02h,AX=6F03h,AX=6F04h,AX=6F05h
SeeAlso: INT 14/AX=6F00h,INT 16/AX=6F00h,INT 17/AX=6F00h,INT 33/AX=6F00h
--------V-106F00BX0000-----------------------
INT 10 - VIDEO - Video7 VGA,VEGA VGA - INSTALLATION CHECK
        AX = 6F00h
        BX = 0000h
Return: BX = 5637h ('V7') indicates Video7 VGA/VEGA VGA extensions are present
SeeAlso: AX=6F01h,AX=6F02h,AX=6F03h,AX=6F04h,AX=6F05h
--------V-106F01-----------------------------
INT 10 - VIDEO - Video7 VGA,VEGA VGA,HP EX-BIOS - GET MONITOR INFO
        AX = 6F01h
Return: AL = monitor type code (HP,VEGA VGA only) (see #00188)
        AH = status register information (see #00189)
        CL = current value of Extended Control register (HP Ext BIOS, and only
                if AL=41h) (see #00190)
Notes:  bits 0-3 are the same as the EGA/VGA status register bits 0-3
        supported by original HP Vectra AT and by ES/QS/RS series Vectras

(Table 00188)
Values for monitor type code (HP Extended BIOS):
 00h    non-HP card with ROM and possibly its own INT 10h driver
 41h    MultiMode video display adapter
 42h-44h reserved
 45h    industry standard monochrome display adapter
 46h    industry standard color display adapter
 51h    reserved

Bitfields for status register information:
Bit(s)  Description     (Table 00189)
 0      display enable
        0 = display enabled
        1 = vertical or horizontal retrace in progress
 1      light pen flip flop set
 2      light pen switch activated
 3      vertical sync
 4      monitor resolution
        0 = high resolution (>200 lines)
        1 = low resolution (<=200 lines)
 5      display type (0 = color, 1 = monochrome)
 6,7    diagnostic bits
Note:   bits 0-3 are the same as the EGA/VGA status register bits 0-3
--------V-106F02-----------------------------
INT 10 - HP Vectra EX-BIOS - SET MONITOR INFO
        AX = 6F02h
        BL = new value for extended control register (see #00190)
Return: AX,BL destroyed
Notes:  this function is only valid when an HP MultiMode Video Display Adapter
          is installed
        the Extended Control register is at I/O address 3DDh
SeeAlso: AX=6F01h,AX=6F03h

Bitfields for HP Vectra extended control register:
Bit(s)  Description     (Table 00190)
 0      screen resolution (0 = 200 lines, 1 = 400 lines)
 1      underline enable (if set, 'blue' of fg color = underline)
 2      font (0 = Standard-8, 1 = HP-Roman-8)
 3      memory disabled for CPU access
 4      allow access to full 32K memory instead of wrapping at 16K
 5      select second 16K page instead of first
 6,7    unused
--------V-106F03-----------------------------
INT 10 - HP Vectra EX-BIOS - MODIFY MONITOR INFO
        AX = 6F03h
        BH = exclude mask (set bits are not modified)
        BL = new values for bits indicated by BH (see #00190)
Return: AX destroyed
Notes:  this function is only valid when an HP MultiMode Video Display Adapter
          is installed
        supported by original HP Vectra AT and by ES/QS/RS series Vectras
SeeAlso: AX=6F01h,AX=6F02h
--------V-106F04-----------------------------
INT 10 - VIDEO - Video7 VGA,VEGA VGA,HP Vectra - GET MODE AND SCREEN RESOLUTION
        AX = 6F04h
Return: AL = current video mode (see #00191)
        BX = horizontal columns (text) or pixels (graphics)
        CX = vertical columns (text) or pixels (graphics)
SeeAlso: AX=6F05h
--------V-106F05-----------------------------
INT 10 - VIDEO - Video7 VGA,VEGA EXTENDED EGA/VGA,HP Vectra - SET VIDEO MODE
        AX = 6F05h
        BL = mode (see #00191)
Return: AX,BL destroyed
Notes:  also supported by the HP Vectra Extended BIOS on the original
          HP Vectra AT and by ES/QS/RS series Vectras
        on the HP Vectra, this function rather than AH=00h must be used to
          return to an IBM-standard mode after setting an HP-specified mode
          from 08h to 0Fh.
SeeAlso: AH=00h,AX=0070h,AX=007Eh,AX=6F04h

(Table 00191)
Values for Video7/VEGA video mode:
     text/ text pixel   pixel   colors disply scrn  system
     grph resol  box  resolution       pages  addr
 00h-13h = standard IBM modes (see #00010 at AH=00h)
 08h = T  80x27   .       .     mono      .     .  HP MultiMode Video
 09h = T  80x27   .       .       .       .     .  HP MultiMode Video
 0Ah = T  40x27   .       .     mono      .     .  HP MultiMode Video
 0Bh = T  40x27   .       .       .       .     .  HP MultiMode Video
 0Ch = reserved                                    HP MultiMode Video
 0Dh = G    .     .    640x400    .       .     .  HP MultiMode Video
 0Eh = G    .     .    320x400    .       .     .  HP MultiMode Video
 0Fh = G    .     .    320x400    .       .     .  HP MultiMode Video
 40h = T  80x43  8x8      .       .       .     .  Video7/VEGA VGA
 41h = T 132x25  8x14     .       .       .     .  Video7/VEGA VGA
 42h = T 132x43  8x8      .       .       .     .  Video7/VEGA VGA
 43h = T  80x60  8x8      .       .       .     .  Video7/VEGA VGA
 44h = T 100x60  8x8      .       .       .     .  Video7/VEGA VGA
 45h = T 132x28  8x8      .       .       .     .  Video7/VEGA VGA
 60h = G    .     .    752x410   16       .     .  Video7 VGA, VEGA VGA
 61h = G    .     .    720x540   16       .     .  Video7 VGA, VEGA VGA
     = G    .     .    720x540   16       .     .  Northgate, Headland 1024i
 62h = G    .     .    800x600   16       .     .  Video7 VGA, VEGA Ext EGA
     = G    .     .    800x600   16       .     .  Headland 1024i
 63h = G    .     .   1024x768    2       .     .  Video7 VGA
 64h = G    .     .   1024x768    4       .     .  Video7 VGA
 65h = G    .     .   1024x768   16       .     .  Video7 VGA, VEGA Ext EGA
     = G    .     .   1024x768   16       .     .  Headland 1024i
 66h = G    .     .    640x400  256       .     .  Video7 VGA, VEGA Ext VGA
     = G    .     .    640x400  256       .     .  Northgate, Headland 1024i
 67h = G    .     .    640x480  256       .     .  Video7 VGA, VEGA Ext VGA
     = G    .     .    640x480  256       .     .  Headland 1024i
 68h = G    .     .    720x540  256       .     .  Video7 VGA, VEGA Ext VGA
     = G    .     .    720x540  256       .     .  Headland 1024i
 69h = G    .     .    800x600  256       .     .  Video7 VGA, VEGA Ext VGA
     = G    .     .    800x600  256       .     .  Headland 1024i
 70h = G    .     .    752x410   16gray   .     .  Video7 VGA, VEGA VGA
 71h = G    .     .    720x540   16gray   .     .  Video7 VGA, VEGA VGA
 72h = G    .     .    800x600   16gray   .     .  Video7 VGA
 73h = G    .     .   1024x768    2gray   .     .  Video7 VGA
 74h = G    .     .   1024x768    4gray   .     .  Video7 VGA
 75h = G    .     .   1024x768   16gray   .     .  Video7 VGA
 76h = G    .     .    640x400  256gray   .     .  Video7 VGA
 77h = G    .     .    640x480  256gray   .     .  Video7 VGA
 78h = G    .     .    720x540  256gray   .     .  Video7 VGA
 79h = G    .     .    800x600  256gray   .     .  (future)
SeeAlso: AH=00h,#00010,AX=0070h,#00011,AX=007Eh,AX=6F04h,#00083
Index:  video modes;Video 7|video modes;VEGA|video modes;Headland
--------V-106F06-----------------------------
INT 10 - VIDEO - Video7 VGA,VEGA VGA - SELECT AUTOSWITCH MODE
        AX = 6F06h
        BL = Autoswitch mode select
             00h select EGA/VGA-only modes
             01h select Autoswitched VGA/EGA/CGA/MGA modes
             02h select 'bootup' CGA/MGA modes
        BH = enable/disable (00h enable, 01h = disable selection)
Return: nothing
--------V-106F07-----------------------------
INT 10 - VIDEO -  Video7 VGA,VEGA VGA - GET VIDEO MEMORY CONFIGURATION
        AX = 6F07h
Return: AL = 6Fh
        AH = memory configuration
            bits 0-6 = number of 256K blocks of video memory
            bit 7    = DRAM/VRAM (0: DRAM, 1: VRAM)
        BH = chip revision (SR8F) (S/C Chip in VEGA VGA)
        BL = chip revision (SR8E) (G/A Chip in VEGA VGA)
        CX = 0000h
SeeAlso: AH=12h/BL=10h
--------V-1070-------------------------------
INT 10 - VIDEO - TANDY 2000 only - GET ADDRESS OF VIDEO RAM
        AH = 70h
Return: AX:BX -> WORD containing green plane's offset
        AX:CX -> WORD containing green plane's segment
        AX:DX -> WORD containing segment of red (offset 0) and blue (offset
                        4000) planes
SeeAlso: AH=71h
--------V-1070------------------------------------
INT 10 - HUNTER 16 - DRAW ELLIPSE/CIRCLE
        AH = 70h
        DS:BX -> control block (see #00192)
Return: nothing
Desc:   Draws a circle or ellipse. Only valid in graphics modes.
Note:   the Husky Hunter 16 is an 8088-based ruggedized laptop.  Other family
          members are the Husky Hunter, Husky Hunter 16/80, and Husky Hawk.
SeeAlso: AH=71h"HUNTER"

Format of HUNTER 16 control block:
Offset  Size    Description     (Table 00192)
 00h    WORD    center X co-ordinate
 02h    BYTE    center Y co-ordinate
 03h    WORD    radius in pixels
 05h    BYTE    color (00h white, 01h black, FFh invert)
 06h    BYTE    aspect ratio x:x (1-127)
 07h    BYTE    aspect ratio y:y (1-127)
--------V-107000BX0000-----------------------
INT 10 - Everex Extended Video BIOS - RETURN EMULATION STATUS
        AX = 7000h
        BX = 0000h
Return: AL = 70h if Trident-based Everex card
        CL = monitor type (see #00193)
        CH = feature bits (see #00194)
        DX = video board info
            bits 4-15: board ID model (see #00195)
            bits 0-3:  board ID revision
        DI = BCD BIOS version number
SeeAlso: AX=5F01h,AH=FFh"Oak"

(Table 00193)
Values for Everex monitor type:
 00h    mono
 01h    CGA
 02h    EGA
 03h    digital multifrequency
 04h    IBM PS/2
 05h    IBM 8514
 06h    SuperVGA
 07h    analog multifrequency
 08h    super multifrequency

Bitfields for Everex feature bits:
Bit(s)  Description     (Table 00194)
 7-6    memory size
        00 = 256K
        01 = 512K
        10 = 1024K
        11 = 2048K
 5      special oscillator present
 4      VGA protect enabled
 0      6845 emulation

(Table 00195)
Values for board model for Trident-based Everex cards:
 0236h  Ultragraphics II
 0620h  Vision VGA
 0673h  EVGA
 0678h  Viewpoint
--------V-107000BX0004-----------------------
INT 10 - Everex Extended Video BIOS - GET PAGING FUNCTION POINTER FOR CURR MODE
        AX = 7000h
        BX = 0004h
Return: ES:DI -> FAR paging function (call with DL = page to set)
Note:   the word preceding ES:DI is the length of the function in bytes, and
          the last byte of the function is a FAR return instruction.
SeeAlso: AX=4F05h,AX=7000h/BX=0000h,AX=7000h/BX=0005h
--------V-107000BX0005-----------------------
INT 10 - Everex Extended Video BIOS - GET SUPPORTED MODE INFO
        AX = 7000h
        BX = 0005h
        CL = maximum number of modes to get info for
        CH = mode type to get info for (see #00196)
        DL = monitor type to get info for
        ES:DI -> buffer for mode info (see #00197)
Return: CL = total number of modes fitting criteria
        CH = size of each info record
SeeAlso: AX=7000h/BX=0000h,AX=7000h/BX=0004h

(Table 00196)
Values for Everex mode type:
 00h    all modes
 01h    monochrome text modes
 02h    color text modes
 03h    four-color CGA graphics modes
 04h    two-color CGA graphics modes
 05h    16-color graphics modes
 06h    256-color graphics modes

Format of Everex mode information record:
Offset  Size    Description     (Table 00197)
 00h    BYTE    mode number (bit 7 set if extended mode)
 01h    BYTE    mode type (see #00196)
 02h    BYTE    info bits (see #00198)
 03h    BYTE    font height
 04h    BYTE    text columns on screen
 05h    BYTE    text rows on screen
 06h    WORD    number of scan lines
 08h    BYTE    color information
                bits 7-4 reserved
                     3-0 bits per pixel

Bitfields for Everex info bits:
Bit(s)  Description     (Table 00198)
 7,6    reserved
 5      monochrome mode
 4      interlaced display
 3      requires special oscillator
 2,1    memory required (00 = 256K, 01 = 512K, 10 = 1024K, 11 = 2048K)
 0      reserved
--------V-1071-------------------------------
INT 10 - VIDEO - TANDY 2000 only - GET ADDRESS OF INCRAM
        AH = 71h
Return: AX:BX -> WORD containing segment address of INCRAM
        AX:CX -> WORD containing offset of INCRAM
SeeAlso: AH=70h"TANDY"
--------V-1071------------------------------------
INT 10 - HUNTER 16 - DRAW LINE/BOX
        AH = 71h
        DS:BX -> control block (see #00199)
Return: nothing
Desc:   Draws a line or box. Only valid in graphics modes.
SeeAlso: AH=70h"HUNTER"

Format of HUNTER 16 control block:
Offset  Size    Description     (Table 00199)
 00h    WORD    left edge X co-ordinate
 02h    BYTE    lower edge Y co-ordinate
 03h    WORD    right edge X co-ordinate
 05h    BYTE    upper edge Y co-ordinate
 06h    BYTE    color (00h white, 01h black, FFh invert)
 07h    BYTE    type (00h line, 01h box)
 08h    BYTE    if non-zero (and type is BOX) fill with color
--------V-1072-------------------------------
INT 10 - VIDEO - TANDY 2000 only - SCROLL RIGHT PART OR ALL OF SCREEN
        AH = 72h
        AL = number of columns to shift scroll area, 00h to clear entire area
        BH = new attributes for blanked columns at left
        CH,CL = row, column of upper left corner of scroll area
        DH,DL = row, column of lower right corner of scroll area
Return: nothing
SeeAlso: AH=06h,AH=07h,AH=73h"TANDY",INT 15/AH=12h/BH=05h
--------V-1072------------------------------------
INT 10 - HUNTER 16 - SELECT TEXT-MODE INVERSE VIDEO MECHANISM
        AH = 72h
        AL = mechanism to use
            00h do not use inverse video
            01h emulate MDA. Display attribute 07h is normal video and 70h is
                inverse video.
            02h use inverse video if background is non-black.
            03h use inverse video for high intensity text.
            04h use inverse video for text with background intensity greater
                than foreground intensity.
            05h use inverse video for text with background color other than
                black or high intensity foreground.
Return: nothing
SeeAlso: AH=70h"HUNTER",AH=71h"HUNTER"
--------V-1073-------------------------------
INT 10 - VIDEO - TANDY 2000 only - SCROLL LEFT PART OR ALL OF SCREEN
        AH = 73h
        AL = number of columns to shift scroll area, 00h to clear entire area
        BH = new attributes for blanked columns at right
        CH,CL = row, column of upper left corner of scroll area
        DH,DL = row, column of lower right corner of scroll area
Return: nothing
SeeAlso: AH=06h,AH=07h,AH=72h"TANDY",INT 15/AH=12h/BH=05h
--------V-1073------------------------------------
INT 10 - HUNTER 16 - SELECT TEXT FONT
        AH = 73h
        AL = new font
              00h  7x7 in a 8x8 cell
              01h  5x7 in a 6x8 cell
              06h  3x5 in a 4x6 cell
Return: BH = cell width
        BL = cell height
SeeAlso: AH=60h"HUNTER",AH=77h"HUNTER"
--------V-1074------------------------------------
INT 10 - HUNTER 16 - SET LCD WINDOWS POSITION
        AH = 74h
        DH = row (0..24)
        DL = column (0..79)
Return: nothing
Desc:   set the position in the virtual screen being displayed in the LCD
          screen. If Split Screen (INT 10/AH=66h) is used, this call sets the
          position for the window which has the cursor.
SeeAlso: AH=66h"HUNTER",AH=75h,AH=76h
--------V-1075------------------------------------
INT 10 - HUNTER 16 - SET ZOOM
        AH = 75h
        AL = new Zoom state (00h off, nonzero on)
Return: nothing
SeeAlso: AH=74h,AH=76h
--------V-1076------------------------------------
INT 10 - HUNTER 16 - LOOKING KEYS
        AH = 76h
        AL = action
             00h home the window
             01h move up one line
             02h move down one line
             03h move left one character
             04h move right one character
             05h flip window to other side of virtual screen
Return: nothing
Desc:   moves the displayed screen around the virtual screen
SeeAlso: AH=74h,AH=75h
--------V-1077------------------------------------
INT 10 - HUNTER 16 - GET GRAPHICS FONT
        AH = 77h
Return: AL = font number (see #00200)
SeeAlso: AH=60h"HUNTER",AH=73h"HUNTER"

(Table 00200)
Values for HUNTER 16 graphics font number:
 00h     7x7  in a  8x8  cell
 01h     5x7  in a  6x8  cell
 02h     7x9  in a  8x10 cell
 03h    14x9  in a 16x10 cell
 04h     7x18 in a  8x20 cell
 05h    14x18 in a 16x20 cell
 06h     3x5  in a  4x6  cell
Note:   size is X * Y
--------V-1078------------------------------------
INT 10 - HUNTER 16 - TURN BACKLIGHT ON/OFF
        AH = 78h
        AL = new state of backlight (00h on, 01h off)
Return: nothing
SeeAlso: AH=64h,INT 15/AH=74h
--------V-107F-------------------------------
INT 10 - Paradise SVGA - WD90C24 INSTALLATION CHECK
        AH = 7Fh
Return: AX = 1234h if WD90C24 chip installed
--------V-107F00-----------------------------
INT 10 - SOLLEX SuperVGA - GET EXTENSIONS INFO
        AX = 7F00h
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                    ES:DI -> info structure (see #00201)
                01h failed
Program: the SOLLEX (Smos videO controLLer EXtensions) SuperVGA functions are
          an extension to the VESA SuperVGA BIOS Extensions (see AX=4F00h) by
          Seiko Epson Corporation intended to provided a standardized interface
          to SuperVGA functionality not addressed by the VESA standard
SeeAlso: AX=4F00h

Format of SOLLEX SuperVGA info structure:
Offset  Size    Description     (Table 00201)
 00h    DWORD   pointer to VESA function dispatch table
 04h    DWORD   pointer to SOLLEX function dispatch table
 08h    DWORD   pointer to VESA SuperVGA info (see #00077 at AX=4F00h)
 0Ch    DWORD   pointer to mode info structure table, consisting of
                  alternating ResInfo (see #00202) and VESA mode information
                  (see #00079 at AX=4F01h) blocks, terminated with an FFFFh word
 10h    DWORD   pointer to font info structure table (see #00203)
 14h    WORD    high resolution crystal frequency in Hz (0000h = not present)
 16h    DWORD   pointer to ASCIZ ID string
 1Ah    DWORD   pointer to timeout reset table
                array of bytes, each a multiple of the minimum time increment
 1Eh    WORD    minimum time increment in timer ticks
 20h    BYTE    inverse options supported
                bit 0: inverse supported
                bits 1-7: reserved
 21h    BYTE    normal color value
 22h    BYTE    inverse color value
 23h    WORD    port to be accessed for normal/inverse settings
 25h    WORD    type of interface chip (currently undefined)
 27h    WORD    program operational mode
                bits 1-0: 00 no preference
                          01 terse (minimum detail in program messages)
                          10 verbose
                          11 use menus if supported, verbose mode otherwise
                bits 7-2: reserved
 29h    WORD    SOLLEX specification version
 2Bh    WORD    version of VESA/SOLLEX implementation
 2Dh    DWORD   offset to relocatable portion of SOLLEX extensions (for CONFIG)
 2Eh    DWORD   offset to unused section of the extensions ROM
 31h 16 BYTEs   reserved
Note:   all DWORD pointers initially require segment fixups; if the segment
          is 0000h, it should be changed to the returned ES, otherwise it
          may be assumed to be correct

Format of SOLLEX SuperVGA ResInfo:
Offset  Size    Description     (Table 00202)
 00h    WORD    16-bit mode number
 02h    WORD    adapter type (00h VGA, 01h EGA, 02h CGA, 03h MDA)
 04h    WORD    display info (see #00206)
 06h    DWORD   pointer to video parameter table
 0Ah    BYTE    replacement entry in master Video Parameter
 0Bh    BYTE    mode requested for mode set by BIOS
 0Ch    DWORD   pointer to LoadReg table
 10h    BYTE    index into table of clock values (see #00204)
SeeAlso: #00201

Format of SOLLEX SuperVGA font info table [array] entry:
Offset  Size    Description     (Table 00203)
 00h    BYTE    required font height
 01h    BYTE    parameter to load text mode font
 02h    BYTE    parameter to load graphics mode font
SeeAlso: #00201

(Table 00204)
Values for SOLLEX SuperVGA clock value index:
 00h    25 MHz
 01h    28 MHz
 02h    PCLK
 03h    31.5 MHz (VESA 640x480)
 04h    reserved
 05h    16 MHz (EGA)
 06h    PCLK
 07h    24 MHz (EGA)
 08h    25 MHz
 09h    28 MHz
 0Ah    36 MHz
 0Bh    45 MHz (for 1024x768)
 0Ch    80 MHz
 0Dh    40 MHz
 0Eh    65 MHz
 0Fh     1 MHz (for powerdown)
SeeAlso: #00201
--------V-107F00BX4000-----------------------
INT 10 - Diamond Stealth 24 - GET S3 INFORMATION BLOCK
        AX = 7F00h
        BX = 4000h
Return: AX = 007Fh if supported
            DX:BX -> DAC set mode routine
SeeAlso: AX=7F00h/BX=4001h,AX=7F00h/BX=4002h,#00732 at INT 1A/AX=B102h
--------V-107F00BX4001-----------------------
INT 10 - Diamond Stealth 24 - GET LINEAR ADDRESS
        AX = 7F00h
        BX = 4001h
Return: AX = 007Fh if supported
            CX = current linear address base (high word)
SeeAlso: AX=7F00h/BX=4000h,AX=7F00h/BX=4002h
--------V-107F00BX4002-----------------------
INT 10 - Diamond Stealth 24 - SET LINEAR ADDRESS
        AX = 7F00h
        BX = 4002h
        CX = new linear address base (high word)
Return: AX = 007Fh if supported
SeeAlso: AX=7F00h/BX=4000h,AX=7F00h/BX=4001h
--------V-107F01BL00-------------------------
INT 10 - SOLLEX SuperVGA - ADAPTER CONTROL - SET ADAPTER
        AX = 7F01h
        BL = 00h
        CX = adapter request (see #00205)
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                01h failed
Note:   initializes video hardware to a particular standard
SeeAlso: AX=7F00h"SOLLEX",AX=7F01h/BL=01h,AX=7F01h/BL=02h

Bitfields for SOLLEX SuperVGA adapter request:
Bit(s)  Description     (Table 00205)
 1-0    adapter type (00 VGA, 01 EGA, 10 CGA, 11 MDA)
 2      reserved
 4-3    change displays (00 none, 01 analog 10 digital 11 panel)
 6-5    desired monitor sense (01 color, 10 mono, 11=8514)
 7      lock override
 8      alternate adapter mode
 15-9   reserved
--------V-107F01BL01-------------------------
INT 10 - SOLLEX SuperVGA - ADAPTER CONTROL - GET ADAPTER
        AX = 7F01h
        BL = 01h
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                01h failed
            BX = adapter type (see #00205)
            DX = display type (see #00206)
SeeAlso: AX=7F00h"SOLLEX",AX=7F01h/BL=00h,AX=7F01h/BL=02h

Bitfields for SOLLEX SuperVGA display type:
Bit(s)  Description     (Table 00206)
 15-9   reserved
 8      alternate display active
 7      Enhanced Color Display monitor active
 6      multi-frequency digital monitor active
 5      PS/2-type monitor active
 4      plasma/electroluminescent panel active
 3      LCD panel active
 2      multi-frequency analog monitor active
 1-0    monitor sense (00 none, 01 color, 10 mono, 11=8514)
--------V-107F01BL02-------------------------
INT 10 - SOLLEX SuperVGA - ADAPTER CONTROL - DETERMINE ADAPTER SUPPORT
        AX = 7F01h
        BL = 02h
        CX = adapter request (see #00205)
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h requested setting can successfully be made
                01h requested setting not available in this configuration
SeeAlso: AX=7F00h"SOLLEX",AX=7F01h/BL=00h
--------V-107F02BL00-------------------------
INT 10 - SOLLEX SuperVGA - DISPLAY OUTPUT CONTROL - SET DISPLAY OUTPUT
        AX = 7F02h
        BL = 00h
        CX = display output setting (see #00207)
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                01h failed
SeeAlso: AX=7F00h"SOLLEX",AX=7F02h/BL=00h

Bitfields for SOLLEX SuperVGA display output setting:
Bit(s)  Description     (Table 00207)
 0      CRTC control in 2,1 valid
 1      enable digital output
 2      enable analog output
 3      panel control in 5,4 valid
 4      enable LCD output
 5      enable plasma/EL output
 6      inverse control in 7 valid
 7      0=normal, 1=inverse
 15-8   reserved
--------V-107F02BL01-------------------------
INT 10 - SOLLEX SuperVGA - DISPLAY OUTPUT CONTROL - GET DISPLAY OUTPUT
        AX = 7F02h
        BL = 01h
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                    BX = display output setting (see #00207)
                    CX = displays attached (see #00208)
                01h failed
SeeAlso: AX=7F00h"SOLLEX",AX=7F02h/BL=00h

Bitfields for SOLLEX SuperVGA displays attached:
Bit(s)  Description     (Table 00208)
 0      PS/2 display on analog output
 1      multi-frequency monitor on analog output
 2      LCD panel attached
 3      plasma/electroluminescent panel attached
 4      multi-frequency monitor on digital output
 5      Enhanced Color Display attached to digital outpt
 6      alternate display
 15-7   reserved
--------V-107F03BL00-------------------------
INT 10 - SOLLEX SuperVGA - VIDEO SUPPORT CONTROL - GET SUPPORT INFO
        AX = 7F03h
        BL = 00h
        CX = support type
                0000h VGA, 0001h EGA, 0002h CGA, 0003h MDA, 0004h extensions,
                0005h-0012h reserved for SOLLEX, 0013h Hercules,
                0014h-001Fh reserved for SOLLEX, 0020h-00FFh reserved for OEM
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                    CX = size of video support code
                    DX = segment of physical video support (0000h if no ROM)
                    ES = segment of active video support
                    ES:DI -> information block (DI = 0000h if none available)
                01h failed
SeeAlso: AX=7F03h/BL=01h
--------V-107F03BL01-------------------------
INT 10 - SOLLEX SuperVGA - VIDEO SUPPORT CONTROL - INITIALIZE VIDEO SUPPORT
        AX = 7F03h
        BL = 01h
        CX = support request
        ES = segment of support code
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                01h failed
Note:   initializes the indicated video support by calling ES:0003h; this
          function may be used to switch the active video support back to
          ROM after AX=7F03h/BL=02h
SeeAlso: AX=7F03h/BL=00h
--------V-107F03BL02-------------------------
INT 10 - SOLLEX SuperVGA - VIDEO SUPPORT CONTROL - GO RAM RESIDENT
        AX = 7F03h
        BL = 02h
        CX = support request
        ES = destination segment
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                01h failed
SeeAlso: AX=7F00h"SOLLEX",AX=7F03h/BL=01h
--------V-107F04BL00-------------------------
INT 10 - SOLLEX SuperVGA - POWER CONTROL - SET POWER STATE
        AX = 7F04h
        BL = 00h
        CX = new power state
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                01h failed
Note:   higher values progressively reduce the operations available on the
          video adapter while yielding increasing power savings
SeeAlso: AX=7F00h"SOLLEX",AX=7F04h/BL=01h
--------V-107F04BL01-------------------------
INT 10 - SOLLEX SuperVGA - POWER CONTROL - GET POWER STATE
        AX = 7F04h
        BL = 01h
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                    CX = current power state
                    DX = maximum state
                01h failed
SeeAlso: AX=7F00h"SOLLEX",AX=7F04h/BL=00h
--------V-107F04BL02-------------------------
INT 10 - SOLLEX SuperVGA - POWER CONTROL - SET TIMEOUT RESET
        AX = 7F04h
        BL = 02h
        CX = timeout reset
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                01h failed
SeeAlso: AX=7F00h"SOLLEX",AX=7F04h/BL=03h
--------V-107F04BL03-------------------------
INT 10 - SOLLEX SuperVGA - POWER CONTROL - GET TIMEOUT RESET
        AX = 7F04h
        BL = 03h
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                    BX = time increment
                    CX = current timeout reset
                    DX = maximum timeout reset
                    ES:DI -> timeout reset table (array of bytes)
                01h failed
Note:   the timeout period is computed as (BYTE ES:[DI+CX]) * BX timer ticks
SeeAlso: AX=7F00h"SOLLEX",AX=7F04h/BL=02h
--------V-107F05-----------------------------
INT 10 - SOLLEX SuperVGA - LOAD REGISTER
        AX = 7F05h
        ES:DI -> register value table (see #00209)
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                01h failed
SeeAlso: AH=F1h,AH=F3h,AH=F5h

Format of SOLLEX SuperVGA register value table:
Offset  Size    Description     (Table 00209)
 00h    WORD    base I/O register (FFFFh = end of list)
 02h 2N BYTEs   pairs of values to be written to the base I/O register as an
                  index value and the following register as a data byte
 2N+2   WORD    FFFFh (end of data list)
        ... (repeats until FFFFh base address)
--------V-107F06-----------------------------
INT 10 - SOLLEX SuperVGA - MULTIPLE FONT CONTROL
        AX = 7F06h
        BL = subfunction
            00h set multiple font state
                CX = new state (00h off, 01h on)
            01h get multiple font state
                Return: BL = current state (00h off, 01h on)
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                01h failed
SeeAlso: AX=1100h,AX=1103h
--------V-107F07-----------------------------
INT 10 - SOLLEX SuperVGA - FILL VIDEO RAM
        AX = 7F07h
        BL = how much to fill
           00h regen size
           01h all video memory
        CX = pattern to write (normally 0720h for text modes and 0000h for gr)
Return: AL <> 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                01h failed
SeeAlso: AH=06h
--------A-1080-------------------------------
INT 10 - CU Writer v1.4 - GET OPTION
        AH = 80h
        AL = desired option
Return: ???
Program: CU Writer is a public-domain Thai-English word processor from
          Chulalongkorn University, Bangkok
SeeAlso: AH=81h"CU Writer"
--------Q-1080--DX4456-----------------------
INT 10 U - VIDEO - DESQview 2.0x only - internal - SET ??? HANDLER
        AH = 80h
        DX = 4456h ('DV')
        ES:DI -> FAR subroutine to be called on ???
Return: DS = segment of DESQview data structure for video buffer
Note:   this function is probably meant for internal use only, due to the magic
          value required in DX
        the subroutine seems to be called when the DESQview menu is accessed;
          on entry, AL = 03h or 04h
--------A-1081-------------------------------
INT 10 - CU Writer v1.4 - SET OPTION
        AH = 81h
        ???
Return: ???
SeeAlso: AH=80h"CU Writer"
--------Q-1081--DX4456-----------------------
INT 10 U - VIDEO - DESQview 2.0x only - internal - GET ???
        AH = 81h
        DX = 4456h ('DV')
Return: ES = segment of DESQview data structure for video buffer
            BYTE ES:[0] = current window number in DV 2.0x
Note:   this function is probably meant for internal use only, due to the magic
          value required in DX
SeeAlso: AH=82h"DESQview"
--------Q-1082--DX4456-----------------------
INT 10 U - VIDEO - DESQview 2.0x only - internal - GET CURRENT WINDOW INFO
        AH = 82h
        DX = 4456h ('DV')
Return: DS = segment in DESQview for data structure
             in DV 2.00,
                  BYTE DS:[0] = window number
                  WORD DS:[1] = segment of other data structure
                  WORD DS:[3] = segment of window's object handle
        ES = segment of DESQview data structure for video buffer
        AL = current window number
        AH = ???
        BL = direct screen writes
            00h program does not do direct writes
            01h program does direct writes, so shadow buffer not usable
        BH = ???
        CL = current video mode
        CH = ???
Note:   this function is probably meant for internal use only, due to the magic
          value required in DX
SeeAlso: AH=81h"DESQview"
--------J-108200-----------------------------
INT 10 - VIDEO - AX PC - GET/SET SCROLL MODE
        AX = 8200h
        BL = new scroll mode or FFh to get current mode
            00h dynamic, 01h software
Return: AL = scroll mode (current mode if BL=FFh, previous mode otherwise)
SeeAlso: AH=06h,AH=07h
--------J-108300-----------------------------
INT 10 - VIDEO - AX PC - GET VIDEO RAM ADDRESS
        AX = 8300h
Return: AX = offset of video RAM
        ES:BX -> virtual text RAM buffer
SeeAlso: AX=5201h
----------1086-------------------------------
INT 10 - ???
        AH = 86h
Note:   called by Diamond Stealth64 Video STLTH64.VXD
SeeAlso: INT 2F/AX=4021h
--------N-108B-------------------------------
INT 10 - Alloy MW386 - FORCE WORKSTATION SCREEN UPDATE
        AH = 8Bh
Return: nothing
SeeAlso: AH=92h,AH=93h
--------N-1090-------------------------------
INT 10 - Alloy MW386 - GET PHYSICAL WORKSTATION DISPLAY MODE
        AH = 90h
Return: AL = current video mode (see #00010 at AH=00h)
SeeAlso: AH=91h
--------N-1091-------------------------------
INT 10 - Alloy MW386 - GET PHYSICAL WORKSTATION ADAPTER TYPE
        AH = 91h
Return: AL = video adapter type (see #00210)
Note:   types less than 80h do not imply that the current user is on the host
SeeAlso: AH=90h

(Table 00210)
Values for Alloy MW386 video adapter type:
 00h    monochrome
 01h    Hercules monochrome graphics
 02h    CGA
 03h    EGA
 04h    VGA
 80h    monochrome text terminal
 81h    Hercules graphics terminal
 82h    color graphics terminal
--------N-1092-------------------------------
INT 10 - Alloy MW386 - INHIBIT WORKSTATION SCREEN UPDATES
        AH = 92h
Return: nothing
Note:   the terminal will be updated even when screen updates are inhibited if
          TTY output is used
SeeAlso: AH=8Bh
--------N-1093-------------------------------
INT 10 - Alloy MW386 - REDRAW SCREEN
        AH = 93h
Return: nothing
SeeAlso: AH=8Bh,AH=FFh
--------V-109508-----------------------------
INT 10 - VHRBIOS.SYS - ???
        AX = 9508h
Return: ???
Program: VHRBIOS.SYS is a driver for the Micro Display Systems "TheGenius"
          black&white A4/portrait monitor
SeeAlso: AH=96h"VHRBIOS.SYS",AH=F0h"VHRBIOS.SYS"
--------V-1096-------------------------------
INT 10 - VHRBIOS.SYS - GET OTHER DISPLAY INFO
        AH = 96h
Return: AL = display type (see AH=1Ah)
        AH = ??? (possibly related to Micro Channel support)
Program: VHRBIOS.SYS is a driver for the Micro Display Systems "TheGenius"
          black&white A4/portrait monitor
Desc:   returns info on any non-Genius video adapter in the system
SeeAlso: AX=9508h"VHRBIOS.SYS",AH=F0h"VHRBIOS.SYS"
--------A-10A0-------------------------------
INT 10 - CU Writer v1.4 - SET PIXEL WRITE MODE
        AH = A0h
        ???
Return: ???
Program: CU Writer is a public-domain Thai-English word processor from
          Chulalongkorn University, Bangkok
SeeAlso: AH=80h"CU Writer",AH=B0h
--------p-10A000-----------------------------
INT 10 - ATI Mach64 BIOS - ???
        AX = A000h
        CL = ??? (bits 2-0 may not be 000)
        CH = ??? (81h or ???)
        DX = segment of ??? (if CH=81h)
        ???
Return: AX = ???
SeeAlso: AX=4F10h/BL=00h,AX=A001h
----------10A001-----------------------------
INT 10 - ATI Mach64 BIOS - ???
        AX = A001h
        CL = ??? flags
        ???
Return: AH = status
            00h successful
            01h failed
        ???
SeeAlso: AX=A000h,AX=A002h
----------10A002-----------------------------
INT 10 - ATI Mach64 BIOS - ???
        AX = A002h
        CL = ??? (bits 2-0 may not be 000)
        CH = ??? (81h or ???)
        DX = segment of ??? (if CH=81h)
        ???
Return: AH = status
            00h successful
            01h failed
        ???
Note:   executes AX=A000h, then AX=A001h if A000h was successful
SeeAlso: AX=A000h,AX=A001h
----------10A003-----------------------------
INT 10 - ATI Mach64 BIOS - ???
        AX = A003h
        BX = ???
        ???
Return: AH = status (00h successful)
        ???
SeeAlso: AX=A000h,AX=A002h
--------V-10A004-----------------------------
INT 10 - PhoenixVIEW/LC - VIDEO DISPLAY TYPE
        AX = A004h
        ???
Return: ???
Desc:   configure display parameters
SeeAlso: AX=A01Bh"PhoenixVIEW/LC"
----------10A004-----------------------------
INT 10 - ATI Mach64 BIOS - ???
        AX = A004h
        BX = video mode??? (0000-00FFh)
        DX = ??? (sent to some port [66ECh???] one bit at a time, high to low)
        ???
Return: AH = status
            00h successful
            01h failed
        ???
SeeAlso: AX=A000h,AX=A002h
----------10A005-----------------------------
INT 10 - ATI Mach64 BIOS - ???
        AX = A005h
        CL = ??? flags (bits 0,2, others?)
        ???
Return: AH = status
            00h successful
            01h failed
        ???
SeeAlso: AX=A000h,AX=A002h
----------10A006-----------------------------
INT 10 - ATI Mach64 BIOS - ???
        AX = A006h
        ???
Return: AH = status
            00h successful
            01h failed
        ???
SeeAlso: AX=A000h,AX=A002h
----------10A007-----------------------------
INT 10 - ATI Mach64 BIOS - GET ???
        AX = A007h
Return: AH = 00h (successful)
        AL = ??? (00h)
        BX = ??? (15A0h in examined BIOS)
        DX = segment of BIOS
SeeAlso: AX=A000h,AX=A002h
----------10A008-----------------------------
INT 10 - ATI Mach64 BIOS - GET ??? SIZE
        AX = A008h
        CL = ??? flags
        ???
Return: AH = 00h (successful)
        BX = size of ??? (0046h if CL bit 0 clear on entry)
SeeAlso: AX=A000h,AX=A009h
----------10A009-----------------------------
INT 10 - ATI Mach64 BIOS - GET ???
        AX = A009h
        DX:BX -> buffer for ???
        CL = ??? flags
        ???
Return: AH = status
            00h successful
                DX:BX buffer filled
            01h failed
        ???
SeeAlso: AX=A000h,AX=A008h
----------10A00A-----------------------------
INT 10 - ATI Mach64 BIOS - GET ???
        AX = A00Ah
Return: AH = 00h (successful)
        AL = ??? (01h)
        BX = ??? (5938h)
        CX = ??? (595Eh)
        DX = segment of BIOS
SeeAlso: AX=A000h,AX=A002h
----------10A00B-----------------------------
INT 10 - ATI Mach64 BIOS - ???
        AX = A00Bh
        BX = ???
        CL = ??? flags
        ???
Return: AH = status
            00h successful
            01h failed
        ???
SeeAlso: AX=A000h,AX=A002h
--------p-10A00C-----------------------------
INT 10 - ATI Mach64 BIOS - SET SLEEP MODE
        AX = A00Ch
        CL = new state
            00h normal operation
            01h standby
            02h suspend
            03h off
Return: AH = status
            00h successful
            01h failed
Note:   CL bit 2 affects values written to video card's ports
SeeAlso: AX=A000h,AX=A00Dh,AX=4F00h,AX=4F10h/BL=01h
----------10A00D-----------------------------
INT 10 - ATI Mach64 BIOS - GET SLEEP MODE
        AX = A00Dh
Return: AH = 00h (successful)
        CL = current power mode
            00h normal operation
            01h standby
            02h suspend
            03h off
SeeAlso: AX=A00Ch,AX=4F10h/BL=02h
----------10A00E-----------------------------
INT 10 - ATI Mach64 BIOS - SET ???
        AX = A00Eh
        CL = ??? (00h-03h)
Return: AH = status
            00h successful
            01h failed
Note:   CL zero/nonzero are treated differently
SeeAlso: AX=A000h,AX=A00Fh
----------10A00F-----------------------------
INT 10 - ATI Mach64 BIOS - GET ???
        AX = A00Fh
Return: AH = 00h (successful)
        CL = ??? (00h-03h, read from PORT 42ECh)
SeeAlso: AX=A000h,AX=A00Eh
----------10A010-----------------------------
INT 10 - ATI Mach64 BIOS - ???
        AX = A010h
        CL = ???  (80h/other)
        ???
Return: AH = status
            00h successful
            01h failed
        ???
SeeAlso: AX=A000h,AX=A002h
----------10A011-----------------------------
INT 10 - ATI Mach64 BIOS - GET ???
        AX = A011h
Return: AH = 00h (successful)
        BL = ??? (1Fh)
        BH = ??? (0Fh)
        CL = ??? (00h)
        CH = ??? (0Fh)
        DX = ??? (00FFh)
SeeAlso: AX=A000h,AX=A010h
----------10A012-----------------------------
INT 10 - ATI Mach64 BIOS - GET ???
        AX = A012h
Return: AH = 00h (successful)
        AL = ??? (00h)
        BX = ??? (0000h)
        CX = ??? (0000h)
        DX = ??? (02ECh)
SeeAlso: AX=A000h,AX=A002h
----------10A013-----------------------------
INT 10 - ATI Mach64 BIOS - ???
        AX = A013h
        ???
Return: AH = status
            00h successful
            01h failed
        ???
Note:   not implemented in examined BIOS, always returns AH=01h
SeeAlso: AX=A000h,AX=A002h
--------V-10A01B-----------------------------
INT 10 - PhoenixVIEW/LC - CRT MONITOR DETECTION
        AX = A01Bh
        ???
Return: ???
Desc:   determine whether an external display is currently attached
SeeAlso: AX=A004h"PhoenixVIEW/LC"
--------U-10AA-------------------------------
INT 10 OU - Player's Tool 3.0 - UNINSTALL
        AH = AAh
Return: ???
Note:   this call has been removed in PT 3.996b
Program: Player's Tool is a game cheater by Dmitry Yakunin & Andy Robinson
SeeAlso: AH=ABh,INT 2F/AH=AAh
--------U-10AB-------------------------------
INT 10 OU - Player's Tool 3.0 - INSTALLATION CHECK
        AH = ABh
Return: BH = FFh
        ???
Note:   this call has been removed in PT 3.996b
SeeAlso: AH=AAh,INT 2F/AH=ABh
--------A-10B0-------------------------------
INT 10 - CU Writer v1.4 - PUT PIXEL
        AH = B0h
        ???
Return: ???
SeeAlso: AH=A0h"CU Writer",AH=B1h,AH=B2h,AH=B3h,AH=B4h,AH=B5h,AH=D0h
--------A-10B1-------------------------------
INT 10 - CU Writer v1.4 - MOVE TO
        AH = B1h
        ???
Return: ???
SeeAlso: AH=B0h,AH=B2h,AH=C0h"CU Writer"
--------A-10B2-------------------------------
INT 10 - CU Writer v1.4 - DRAW LINE TO
        AH = B2h
        ???
Return: ???
SeeAlso: AH=B0h,AH=B1h,AH=B3h,AH=B4h,AH=B5h
--------A-10B3-------------------------------
INT 10 - CU Writer v1.4 - FLOOD FILL
        AH = B3h
        ???
Return: ???
SeeAlso: AH=B2h,AH=B5h
--------A-10B4-------------------------------
INT 10 - CU Writer v1.4 - DRAW RECTANGLE
        AH = B4h
        ???
Return: ???
SeeAlso: AH=B0h,AH=B2h,AH=B3h,AH=B5h
--------A-10B5-------------------------------
INT 10 - CU Writer v1.4 - DRAW FILLED RECTANGLE
        AH = B5h
        ???
Return: ???
SeeAlso: AH=B0h,AH=B2h,AH=B3h,AH=B4h
--------V-10BB-------------------------------
INT 10 U - Doorway - SET BIOS/DIRECT REDIRECTION
        AH = BBh
        AL = new redirection mode
            00h BIOS (hook and redirect INT 10h,etc.)
            01h DIRECT (scan video memory for changes)
Return: ???
SeeAlso: INT 16/AH=67h"Doorway"
--------V-10BD44-----------------------------
INT 10 U - Compaq QVision - ???
        AX = BD44h
        ???
Return: ???
Note:   called by Compaq's MTX132.COM, which places the QVision in 132-column
          mode
--------!---Section--------------------------
Interrupt List, part 2 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------V-10BF--CX0000-----------------------
INT 10 - Athena Digital HGCIBM.COM - INSTALLATION CHECK
        AH = BFh
        CX = 0000h (???)
Return: CX = 0202h
        DL = ??? (internal data, possibly version number)
--------b-10BF00-----------------------------
INT 10 - VIDEO - Compaq Extensions - SELECT EXTERNAL MONITOR
        AX = BF00h
Return: nothing
Desc:   specify that the external monitor become the active monitor
Note:   all registers preserved and the internal monitor is blanked
SeeAlso: AX=BF01h,AX=BF12h,AH=12h/BL=35h
--------b-10BF01-----------------------------
INT 10 - VIDEO - Compaq Extensions - SELECT INTERNAL MONITOR
        AX = BF01h
Return: nothing
Desc:   specify that the internal monitor become the active monitor
Note:   all registers preserved and the external monitor is blanked
SeeAlso: AX=BF00h,AX=BF12h,AH=12h/BL=35h
--------b-10BF02-----------------------------
INT 10 - VIDEO - Compaq Extensions - SET MASTER MODE OF CURRENT CONTROLLER
        AX = BF02h
        BH = master mode
            04h CGA
            05h EGA
            07h MDA
Return: nothing
SeeAlso: AX=BF03h
--------b-10BF03BX0000-----------------------
INT 10 - VIDEO - Compaq Extensions - GET ENVIRONMENT
        AX = BF03h
        BX = 0000h
Return: BH = active monitor
            (00h = external, 01h = internal, 03h both, 04h neither)
        BL = master mode (see #00211)
        CH = ASIC type and version
            00h (reserved, very early Compaq VGCs)
            31h if QVision VGA
        CL = switchable VDU modes supported (see #00212)
        DH = internal monitor type (see #00213)
        DL = external monitor type (see #00213)
SeeAlso: AX=1A00h,AX=BF00h,AX=BF01h,AX=BF02h,AX=BF11h

(Table 00211)
Values for Compaq video master mode:
 00h    switchable VDU not present
 04h    CGA
 05h    EGA
 07h    MDA
 08h    switchable LCD controller present
 09h    plasma VGA
 0Ah    TFT (active-matrix) VGA

Bitfields for Compaq switchable VDU modes support:
Bit(s)  Description     (Table 00212)
 0      CGA supported
 1,2    reserved (1)
 3      MDA supported
 4      BitBLT engine available
 5      132-column support availble
 6      640x480x256 mode available
 7      8-bit DAC mode available

(Table 00213)
Values for Compaq monitor type:
 00h    none
 01h    dual-mode monitor
 02h    5153 RGB monitor (RGBI 16-color)
 03h    Compaq Color monitor
 04h    640x400 flat panel (Plasma CGA)
 05h    VGC monochrome
 06h    VGC color
 07h    8-level mono LCD VGA (internal)
        1024x768 mono VGA (external)
 08h    16-level mono plasma VGA (internal)
        1024x768 color VGA (external)
 09h    4-level mono LCD CGA
 0Ah    16-level mono LCD VGA
 0Bh    active-matrix color VGA
 0Ch    active-matrix mono VGA
 0Dh    STN color VGA
--------b-10BF04-----------------------------
INT 10 - VIDEO - Compaq Extensions - SET MODE SWITCH DELAY
        AX = BF04h
        BH = new state of delay (00h enabled, 01h disabled)
Return: nothing
Note:   the 04/08/93 sytem ROM appears to use BL instead of BH; a future
          version of the list will provide more definite information
SeeAlso: AX=BF05h
--------b-10BF05-----------------------------
INT 10 - VIDEO - Compaq Extensions - ENABLE/DISABLE DISPLAY
        AX = BF05h
        BH = new state of video
            00h off
            01h on
Return: nothing
Note:   the 04/08/93 sytem ROM appears to use BL instead of BH; a future
          version of the list will provide more definite information
SeeAlso: AH=12h/BL=36h,AX=BF04h
--------b-10BF06-----------------------------
INT 10 - VIDEO - Compaq SLT/286 - READ GRAY SCALE TABLE
        AX = BF06h
        CL = address to be read from gray scale table
Return: AL = bit 3-0 - Value read from gray scale table
        CL = address to be read from gray scale table
SeeAlso: AH=12h/BL=33h,AX=BF07h
--------b-10BF07-----------------------------
INT 10 - VIDEO - Compaq SLT/286 - WRITE GRAY SCALE TABLE
        AX = BF07h
        CH = value to write to gray scale table
        CL = address to be written to gray scale table
Return: nothing
SeeAlso: AX=BF06h,AX=BF08h
--------b-10BF08-----------------------------
INT 10 - VIDEO - Compaq SLT/286 - WRITE COLOR MIX REGISTERS
        AX = BF08h
        CH = bits 7-4 green weight
             bits 3-0 blue weight
        CL = bits 7-4 unused
             bits 3-0 red weight
Return: nothing
SeeAlso: AH=12h/BL=33h,AX=BF07h
--------b-10BF09-----------------------------
INT 10 - VIDEO - Compaq Extensions - TURN ON REVERSE VIDEO
        AX = BF09h
Return: CF clear
Notes:  sets bit 6 of port 03CEh index 81h; in some cases also sets index 84h
          to 6Fh and index 83h to 04h
        supported by at least the QVision board and the LTE Lite ROM BIOS
SeeAlso: AX=BF0Ah,AX=BF0Bh
--------b-10BF0A-----------------------------
INT 10 - VIDEO - Compaq Extensions - TURN OFF REVERSE VIDEO
        AX = BF0Ah
Return: CF clear
Notes:  clears bit 6 of port 03CEh index 81h; in some cases also sets index 84h
          to 80h and index 83h to FBh
        supported by at least the QVision board and the LTE Lite ROM BIOS
SeeAlso: AX=BF09h,AX=BF0Bh
--------b-10BF0B-----------------------------
INT 10 - VIDEO - Compaq Extensions - CHECK WHETHER VIDEO REVERSED
        AX = BF0Bh
Return: CF clear
        AX = state (0000h normal video, 0001h reverse video)
Note:   supported by at least the QVision board and the LTE Lite ROM BIOS
SeeAlso: AX=BF09h,AX=BF0Ah
--------b-10BF0C-----------------------------
INT 10 - VIDEO - Compaq Extensions - SET DAC 6-BIT MODE
        AX = BF0Ch
Return: CF clear
Desc:   specify that video DAC registers use only six bits of color info
Note:   supported by at least the QVision board and the SystemPro XL ROM BIOS
SeeAlso: AX=BF0Dh,AX=BF0Eh
--------b-10BF0D-----------------------------
INT 10 - VIDEO - Compaq Extensions - SET DAC 8-BIT MODE
        AX = BF0Dh
Return: CF clear
Desc:   specify that video DAC registers use all eight bits of color info
Note:   supported by at least the QVision board and the SystemPro XL ROM BIOS
SeeAlso: AX=BF0Ch,AX=BF0Eh
--------b-10BF0E-----------------------------
INT 10 - VIDEO - Compaq Extensions - CHECK DAC 6-BIT/8-BIT mode
        AX = BF0Eh
Return: CF clear
        AL = DAC mode
            00h in 6-bit mode
            01h in 8-bit mode
Note:   supported by at least the QVision board and the SystemPro XL ROM BIOS
SeeAlso: AX=BF0Ch,AX=BF0Dh
--------b-10BF0F-----------------------------
INT 10 - VIDEO - Compaq Extensions - SET HIGH ADRESS MAP REGISTER
        AX = BF0Fh
        BX = high address map location in megabytes, or
            0000h to disable high address map, or
            FFFFh to let ROM configure high address map
Return: CF clear
        AX = previous value of high address map register
Notes:  supported by at least the QVision board and the SystemPro XL and LTE
          Lite ROM BIOSes
SeeAlso: AX=BF10h
--------b-10BF10-----------------------------
INT 10 - VIDEO - Compaq Extensions - GET HIGH ADDRESS MAP REGISTER
        AX = BF10h
Return: CF clear
        AX = current value of high address map register
Notes:  supported by at least the QVision board and the SystemPro XL and LTE
          Lite ROM BIOSes
        the Compaq QVision documentation (October 1993) says the value is
          returned in BX, but this appears to be one of many typos
SeeAlso: AX=BF0Fh
--------b-10BF11-----------------------------
INT 10 - VIDEO - Compaq Extensions - GET EXTENDED ENVIRONMENT
        AX = BF11h
Return: AL = BFh if supported
            CF clear
            ES:DI -> ASCII signature "COMPAQ"
            ES:SI -> advanced functionality table (see #00214)
Note:   supported by at least the QVision board and the LTE Lite and ProSignia
          ROM BIOSes
SeeAlso: AX=1A00h,AX=BF03h

Bitfields for Compaq advanced video functionality:
Bit(s)  Description     (Table 00214)
 31     future graphics extensions (reserved, set to 0)
 30-16  reserved
 15-12  available video memory in 256K blocks, less one (0000 = 256K, etc.)
 11-8   reserved
 7      QVision modes supported
 6      Advanced VGA modes supported
 5      Accelerated VGA modes supported
 4      standard VGA modes supported
 3-2    reserved
 1      132-column modes supported
 0      reserved
--------b-10BF12-----------------------------
INT 10 - VIDEO - Compaq Extensions - NEW ACTIVE MONITOR
        AX = BF12h
        BH reserved
        BL = function mask (see #00215)
Return: CF clear
Notes:  this function is a NOP if the VGA subsystem is inactive or the current
          Display Combination Code is 10h or higher
        supported by at least the QVision board and the LTE Lite and ProSignia
          ROM BIOSes
SeeAlso: AX=BF01h,AX=BF02h,#00733

Bitfields for function mask:
Bit(s)  Description     (Table 00215)
 7      command mode
        if set, bits 1 and 0 make the monitor active when set
        if clear, bits 1 and 0 toggle the monitor's state when set
 6-2    reserved
 1      internal monitor
 0      external monitor
--------b-10BF13-----------------------------
INT 10 - VIDEO - Compaq QVision - GAMMA CORRECTION
        AX = BF13h
        BL = subfunction
            00h load gamma correction table for true-color mode
                DS = BIOS data segment
            01h set palette RAM bypass
        BH = 00h
Return: nothing
Note:   these functions must be called after a video mode set, and are in
          effect only for the current video mode
SeeAlso: #00733
--------V-10BFA0BXADAD-----------------------
INT 10 - VIDEO - Compaq ADAPT.COM - INSTALLATION CHECK
        AX = BFA0h
        BX = ADADh
Return: AX = BDBDh if newer ADAPT.COM installed
            BX = BCD version (BH = major, BL = minor)
            CL = ???
            CH = ???
            DL = ???
        AX = ADADh if older version of ADAPT.COM installed
Program: ADAPT is Compaq's Advanced Display Attribute Programming Tool, an
          optionally-resident utility for setting display colors and cursor
          size; when resident, it also includes a screen blanker
SeeAlso: AX=BFA1h,AX=BFA2h,AX=DFA5h
Index:  screen saver;ADAPT
--------V-10BFA1-----------------------------
INT 10 - VIDEO - Compaq ADAPT.COM - GET ???
        AX = BFA1h
Return: AX = BDBEh if supported
            CH = current value of ???
            DL = current value of ???
SeeAlso: AX=BFA0h,AX=BFA2h
--------V-10BFA2-----------------------------
INT 10 - VIDEO - Compaq ADAPT.COM - SET ???
        AX = BFA2h
        CH = new value for ???
        DL = new value for ???
Return: AX = BDBEh if supported
SeeAlso: AX=BFA0h,AX=BFA1h
--------A-10C0-------------------------------
INT 10 - CU Writer v1.4 - GO TO TEXT ROW AND COLUMN
        AH = C0h
        ???
Return: ???
SeeAlso: AH=B1h,AH=C1h,AH=C2h,AH=C3h,AH=C4h
--------V-10C000-----------------------------
INT 10 - S3 SpeedUp v3.00+ - INSTALLATION CHECK
        AX = C000h
Return: AX = FFFFh if installed
            DX = version number (binary, DH=major, DL=minor)
            BX = resident code segment
Program: S3SPDUP is a freeware TSR by Dietmar Meschede to improve the speed
          of chained video modes (both VESA and VGA Mode 13) on S3-chipset
          video cards
SeeAlso: AX=C001h,AX=C002h,AX=C003h,AX=D000h"S3VBE"
--------V-10C001-----------------------------
INT 10 - S3 SpeedUp v3.00+ - GET ACTIVE OPTIONS
        AX = C001h
Return: AX = FFFFh if function supported
            BX = currently active options (see #00216)
SeeAlso: AX=C000h,AX=C002h,AX=C003h

Bitfields for S3SpeedUp options:
Bit(s)  Description     (Table 00216)
 0      speed up banked VESA modes
 1      speed up 320x200 VGA mode 13
SeeAlso: #00222
--------V-10C002-----------------------------
INT 10 - S3 SpeedUp v3.00+ - SET ACTIVE OPTIONS
        AX = C002h
        BX = new value for active options (see #00216)
Return: AX = FFFFh if function supported
SeeAlso: AX=C000h,AX=C001h,AX=C003h,AX=D003h"S3VBE"
--------V-10C003-----------------------------
INT 10 - S3 SpeedUp v3.10+ - GET FLAGS
        AX = C003h
Return: AX = FFFFh if function supported
            BX = flags
                bit 0: SpeedUp is active
                bit 1: Windows run after SpeedUp
SeeAlso: AX=C000h,AX=C001h,AX=C002h,AX=D005h"S3VBE"
--------V-10C004-----------------------------
INT 10 - S3 SpeedUp v3.10+ - RESERVED FUNCTIONS
        AX = C004h-C0FFh
Return: AX = 5555h
SeeAlso: AX=C000h
--------A-10C1-------------------------------
INT 10 - CU Writer v1.4 - OUTPUT TEXT
        AH = C1h
        ???
Return: ???
SeeAlso: AH=C0h,AH=C2h,AH=C3h,AH=C4h
--------A-10C2-------------------------------
INT 10 - CU Writer v1.4 - REVERSE TEXT
        AH = C2h
        ???
Return: ???
SeeAlso: AH=C0h,AH=C1h,AH=C3h,AH=C4h
--------A-10C3-------------------------------
INT 10 - CU Writer v1.4 - TEXT BAR
        AH = C3h
        ???
Return: ???
SeeAlso: AH=C0h,AH=C1h,AH=C4h
--------A-10C4-------------------------------
INT 10 - CU Writer v1.4 - TEXT MENU
        AH = C4h
        ???
Return: ???
SeeAlso: AH=C0h,AH=C1h,AH=C3h,AH=D0h
--------V-10CB00-----------------------------
INT 10 - UNCHAIN - SAVE CURRENT VGA REGISTERS
        AX = CB00h
Note:   combined with AX=CB06h, this function permits the use of video mode
          13h together with the VGA's unchained mode
SeeAlso: AX=CB06h,AX=CBFFh
--------V-10CB01-----------------------------
INT 10 - UNCHAIN - UPDATE PAGE 1 OFFSET
        AX = CB01h
        BX = offset of page 1
Return: nothing
Desc:   inform UNCHAIN of the location of video page 1 in video memory; the
          default is 0000h
SeeAlso: AX=CB02h,AX=CB03h,AX=CB04h,AX=CBFFh
--------V-10CB02-----------------------------
INT 10 - UNCHAIN - UPDATE PAGE 2 OFFSET
        AX = CB02h
        BX = offset of page 2
Return: nothing
Desc:   inform UNCHAIN of the location of video page 2 in video memory; the
          default is 3E80h (16000, for 320x200)
SeeAlso: AX=CB00h,AX=CB01h,AX=CB03h,AX=CB04h
--------V-10CB03-----------------------------
INT 10 - UNCHAIN - UPDATE PAGE 3 OFFSET
        AX = CB03h
        BX = offset of page 3
Return: nothing
Desc:   inform UNCHAIN of the location of video page 3 in video memory; the
          default is 7D00h (32000, for 320x200)
SeeAlso: AX=CB01h,AX=CB02h,AX=CB04h
--------V-10CB04-----------------------------
INT 10 - UNCHAIN - UPDATE PAGE 4 OFFSET
        AX = CB04h
        BX = offset of page 4
Return: nothing
Desc:   inform UNCHAIN of the location of video page 4 in video memory; the
          default is BB80h (48000, for 320x200)
SeeAlso: AX=CB01h,AX=CB02h,AX=CB03h,AX=CB05h
--------V-10CB05-----------------------------
INT 10 - UNCHAIN - SAVE PALETTE
        AX = CB05h
Return: nothing
SeeAlso: AX=CB00h,AX=CB06h
--------V-10CB06-----------------------------
INT 10 - UNCHAIN - RESTORE VGA REGISTERS
        AX = CB06h
Return: nothing
SeeAlso: AX=CB00h,AX=CB05h,AX=CBFFh
--------V-10CBFF-----------------------------
INT 10 - UNCHAIN - INSTALLATION CHECK
        AX = CBFFh
Return: AX = CCBBh if installed
Program: UNCHAIN is a TSR by Colin Buckley which permits use of Borland
          development tools with Mode X video in the absence of a second
          monitor
SeeAlso: AX=CB00h,AX=CB01h,AX=CB06h
--------V-10CC00-----------------------------
INT 10 - VIDEO - UltraVision - GET STATUS (INSTALLATION CHECK)
        AX = CC00h
        SI = magic value 0000h (if checking version)
Return: CX = product signature
            ABCDh UltraVision
            5546h ('UF') UltraFont
        AL = Ultravision extensions
            00h enabled
            FFh disabled
        AH = card designator
        BX:00F0h -> palette values (for compatibility with NEWFONT)
        DX = support for high resolution modes
            00h not active
            01h active
        SI = UltraVision version number (v1.2+), high byte=major,low byte=minor
            unchanged for versions <1.2
Note:   UltraFont is a simplified version of UltraVision for Toshiba;
          only the signature in CX and the status in AL will be returned
SeeAlso: AX=CC01h,AX=CC02h
--------V-10CC01-----------------------------
INT 10 - VIDEO - UltraVision - DISABLE EXTENSIONS
        AX = CC01h
Return: nothing
Notes:  subsequent BIOS calls will be passed through to previous handler
        should be followed immediately by mode set to restore normal EGA/VGA
          state
SeeAlso: AX=CC02h
--------V-10CC02-----------------------------
INT 10 - VIDEO - UltraVision - ENABLE EXTENSIONS
        AX = CC02h
Return: nothing
Note:   should be followed immediately by mode set to restore previous
          UltraVision state
SeeAlso: AX=CC01h
--------U-10CCAB-----------------------------
INT 10 - HiFont - INSTALLATION CHECK
        AX = CCABh
Return: AX = ABCCh
Program: HiFont is a 8x19 font driver for standard VGA by Solar Designer
--------V-10CD00-----------------------------
INT 10 - VIDEO - UltraVision - LOAD ULTRAVISION PALETTE (color EGA,VGA)
        AX = CD00h
        CL = palette table number (01h-07h for v1.x, 01h-0Fh for v2+)
        DS:DX -> 16-byte palette register list (colors for registers 00h-0Fh)
Return: nothing
Notes:  if palette locking is in effect for the current mode, the new colors
          will be displayed immediately; otherwise, the system reverts to the
          default palette
        palette table 0 is reserved for the default palette and cannot be set
        UltraVision always sets the border color to black
SeeAlso: AX=CD01h,AX=CD02h
--------V-10CD01-----------------------------
INT 10 - VIDEO - UltraVision - SET PALETTE LOCKING STATUS (color EGA,VGA)
        AX = CD01h
        CL = palette locking value
            00h none
            01h text modes only (02h,03h)
            FFh all modes (all standard color text and graphics modes)
Return: nothing
Notes:  intended for video modes with 16 or fewer colors
SeeAlso: AX=1000h,AX=1002h,AX=CD00h,AX=CD03h
--------V-10CD02-----------------------------
INT 10 - VIDEO - UltraVision - GET ULTRAVISION PALETTE (EGA,VGA)
        AX = CD02h
Return: CL = palette table number
        DS:DX -> 17-byte palette register list (see #00217)
        DS:SI -> current font names table (see #00218,#00219)
Note:   only the font names are valid on monochrome EGA systems
SeeAlso: AX=1009h,AX=CD00h

Format of UltraVision palette register list:
Offset  Size    Description     (Table 00217)
 00h 16 BYTEs   colors for palette registers 00h through 0Fh
 10h    BYTE    border color

Format of UltraVision v2+ current font names table:
Offset  Size    standard EGA    HiRes EGA       VGA     (Table 00218)
 00h  8 BYTEs   N/A             F19 font        F20 font
 08h  8 BYTEs   F14 font        F14 font        F14 font
 10h  8 BYTEs   N/A             F11 font        F10 font
 18h  8 BYTEs   F8 font         F8 font         F8 font

Format of UltraVision v1.x current font names table:
Offset  Size    HiRes EGA       (Table 00219)
 00h  8 BYTEs   F19/F14 font
 08h  8 BYTEs   F11/F8 font
--------V-10CD03-----------------------------
INT 10 - VIDEO - UltraVision - GET PALETTE LOCKING STATUS (color EGA,VGA)
        AX = CD03h
Return: CL = palette locking value
            00h none
            01h text modes only
            FFh all modes
SeeAlso: AX=CD01h
--------V-10CD04-----------------------------
INT 10 - VIDEO - UltraVision - GET UltraVision TEXT MODE (EGA,VGA)
        AX = CD04h
Return: AL = mode number (see #00220)
SeeAlso: AH=0Fh,AX=CC00h,AH=CDh

(Table 00220)
Values for UltraVision video mode number:
 11h    80x25
 12h    80x43, 80x50
 13h    80x34, 80x36
 14h    80x60, 80x63
 19h    94x25
 1Ah    94x43, 94x50
 1Bh    94x36
 1Ch    94x63
 21h    108x25
 22h    108x43, 108x50
 23h    107x34, 108x36
 24h    108x60, 108x63
 31h    120x25
 32h    120x43, 120x50
 33h    132x25
 34h    132x44, 132x50
 39h    120x36
 3Ah    120x63
 3Bh    132x36
 3Ch    132x60
Index:  video modes;UltraVision
--------V-10CD05-----------------------------
INT 10 - VIDEO - UltraVision - SET CURSOR TYPE (EGA,VGA)
        AX = CD05h
        CL = type
            00h line cursor
            FFh box cursor
Return: nothing
Note:   sets default cursor type for text-based programs
SeeAlso: AH=01h,AX=CD06h
--------V-10CD06-----------------------------
INT 10 - VIDEO - UltraVision - GET CURSOR TYPE (EGA,VGA)
        AX = CD06h
Return: CL = type
            00h line cursor
            FFh box cursor
SeeAlso: AH=03h,AX=CD05h
--------V-10CD07-----------------------------
INT 10 - VIDEO - UltraVision v1.2+ - SET UNDERLINE STATUS (EGA,VGA)
        AX = CD07h
        CL = hardware underline status (see #00221)
        BL = foreground color for normal text (FFh = current)
        BH = foreground color for bright text (FFh = current)
Return: CL = hardware underline status
        BL = current foreground color for normal text
        BH = current foreground color for bright text
Notes:  when underline or strikeout is enabled in color text modes, the
          specified colors will be assigned temporarily to colors 01h and 09h,
          allowing affected text to match non-underlined text.  The color
          remapping uses values from the current onscreen palette regardless
          of the palette locking status (see AX=CD01h)
        specify the standard colors (BL=01h,BH=09h) to enable underline or
          strikeout without color remapping
SeeAlso: AX=CD08h

(Table 00221)
Values for hardware underline status:
 00h    off (color systems only)
 01h    underline below characters
 02h    strike through characters
--------V-10CD08-----------------------------
INT 10 - VIDEO - UltraVision v1.2+ - GET UNDERLINE STATUS (EGA,VGA)
        AX = CD08h
Return: CL = hardware underline status (see #00221)
        BL = foreground color for normal text
        BH = foreground color for bright text
Note:   only CL is valid on monochrome EGA systems
SeeAlso: AX=CD07h
--------V-10CD10-----------------------------
INT 10 - VIDEO - UltraVision - LOAD USER FONT (EGA,VGA)
        AX = CD10h
        BH = bytes per character (08h,0Ah,0Bh,0Eh,13h,14h)
        CX = ABCDh load 9xN alternate font (v2+)
           else number of characters to load
                DX = character offset into font table
                DS:SI -> 8-byte ASCII font name
        ES:BP -> font definitions
Return: AX = FFFFh if invalid font parameters
Notes:  loads the designated characters into UltraVision's resident font area
        should be followed by a video mode set to reload character generator
SeeAlso: AX=1100h,AX=1103h
--------V-10CD-------------------------------
INT 10 - VIDEO - UltraVision - SET ULTRAVISION TEXT MODE (EGA,VGA)
        AH = CDh
        AL = text mode number (see #00220)
Return: AX = CDCDh if invalid mode
SeeAlso: AX=CD04h
--------A-10D0-------------------------------
INT 10 - CU Writer v1.4 - LOAD PICTURE
        AH = D0h
        ???
Return: ???
SeeAlso: AH=B0h"CU Writer",AH=C4h
--------V-10D0-------------------------------
INT 10 U - VIDEO - HP 100LX/200LX - SET ZOOM MODE
        AH = D0h
        AL = zoom mode
            02h 80x25 mono
            03h 80x25 color
            80h 64x18 mono
            81h 64x18 color
            82h 40x25 mono
            83h 40x25 color
            84h 40x16 mono
            85h 40x16 color
Return: nothing
Note:   zoom mode can only be changed within zoom modes of the same color
          scheme; if needed, set to mono/color with AH=00h,AL=02h/03h; with
          mono video modes AL=07h or AL=21h only 80x25 and 40x16 will work
        the current zoom mode is stored in the BIOS data area at 0040h:009Fh
SeeAlso: AH=D1h,AH=D4h
--------V-10D000-----------------------------
INT 10 - S3VBE/Core2.0 v3.00+ - INSTALLATION CHECK
        AX = D000h
Return: AX = FFFFh if installed
            BX = resident code segment
            DX = version (binary, DH = major, DL = minor)
Program: S3VBE/Core2.0 is a freeware TSR by Dietmar Meschede to provide
          VESA 2.0 services on S3-based video cards with VESA 1.2 BIOS
SeeAlso: AX=D001h"S3VBE",AX=D002h"S3VBE",AX=D003h"S3VBE",AX=D005h"S3VBE"
--------V-10D001-----------------------------
INT 10 - S3VBE/Core2.0 v3.00+ - GET ACTIVE OPTIONS
        AX = D001h
Return: AX = FFFFh if supported
            BX = currently active options (see #00222)
SeeAlso: AX=D000h"S3VBE",AX=D002h"S3VBE"

Bitfields for S3VBE options:
Bit(s)  Description     (Table 00222)
 0      VESA VBE v2.0 extensions enabled
 1      linear frame buffer enabled
 2      low-resolution video mode support enabled
 8      never clear video memory during VBE mode set (v3.10+)
---debug options---
 12     report VBE version 1.2 (v3.10+)
 13     always fail AX=4F0Ah (v3.10+)
 14     don't copy video mode list (v3.12+)
SeeAlso: #00216
--------V-10D002-----------------------------
INT 10 - S3VBE/Core2.0 v3.00+ - SET ACTIVE OPTIONS
        AX = D002h
        BX = new active options (see #00222)
Return: AX = FFFFh if supported
SeeAlso: AX=D000h"S3VBE",AX=D001h"S3VBE"
--------V-10D003-----------------------------
INT 10 U - S3VBE/Core2.0 v3.10+ - GET VBE/Core CAPABILITIES
        AX = D003h
Return: AX = FFFFh if supported
            BX = capabilities
                bit 0: SpeedUp = activate/deactivate linear addressing at
                        A0000h for VBE functions 04h/05h
SeeAlso: AX=D000h"S3VBE",AX=D001h"S3VBE",AX=D004h"S3VBE",AX=D005h"S3VBE"
--------V-10D004-----------------------------
INT 10 U - S3VBE/Core2.0 v3.10+ - ACTIVATE SPEED-UP
        AX = D004h
Return: AX = FFFFh if supported
        BX = status
            0000h SpeedUp activated
            0001h SpeedUp not possible (wrong memory organization for mode)
            0002h SpeedUp not possible (linear frame buffer active)
Note:   called by S3 SpeedUp (see AX=C000h)
SeeAlso: AX=C000h"SpeedUp",AX=D000h"S3VBE",AX=D003h"S3VBE",AX=D005h"S3VBE"
--------V-10D005-----------------------------
INT 10 U - S3VBE/Core2.0 v3.10+ - DEACTIVATE SPEED-UP
        AX = D005h
Return: AX = FFFFh if supported
        BX = status
            0000h SpeedUp deactivated
            0001h SpeedUp not possible (wrong memory organization for mode)
            0002h SpeedUp not possible (linear frame buffer active)
Notes:  called by S3 SpeedUp (see AX=C000h)
        functions 06h-FFh (e.g. AX=D006h-D0FFh) are considered reserved by
          v3.10+ and return AX=5555h
SeeAlso: AX=C000h"SpeedUp",AX=D000h"S3VBE",AX=D003h"S3VBE",AX=D004h"S3VBE"
--------V-10D1-------------------------------
INT 10 U - VIDEO - HP 100LX/200LX - INTERNAL - ???
        AH = D1h
        AL = 01h
Return: ???
Note:   called by AH=D0h
SeeAlso: AH=D0h,AH=D4h
--------V-10D4-------------------------------
INT 10 U - VIDEO - HP 100LX/200LX - INTERNAL - ???
        AH = D4h
        AL = 29h
Return: ???
Note:   called by AH=D0h
SeeAlso: AH=D0h,AH=D1h
--------V-10D5-------------------------------
INT 10 - Netroom SCRNCLK - ???
        AH = D5h
        ???
Return: ???
Program: SCRNCLK is a "cloaked" screen accelerator included with Netroom
--------t-10DAAD-----------------------------
INT 10 - TSRUNIT v1.10 - INSTALLATION CHECK
        AX = DAADh
        BX = check signature (different for each TSR)
        CX = 0000h
Return: CX = return signature (nonzero) if installed
            ES = program segment prefix
Program: TSRUNIT is a Turbo Pascal unit for creating TSRs by Nir Sofer
--------V-10DFA5-----------------------------
INT 10 U - VIDEO - Compaq ADAPT.COM - GET ??? DATA AREA
        AX = DFA5h
Return: AX = BDBFh if supported
            ES:DI -> ??? data area
            BX = ES
SeeAlso: AX=BFA0h
--------V-10EE-------------------------------
INT 10 - VIDEO - IBM "Private" Function
        AH = EEh
SeeAlso: INT 13/AH=FFh"IBM"
--------V-10EF-------------------------------
INT 10 - VIDEO - MSHERC.COM - GET VIDEO ADAPTER TYPE AND MODE
        AH = EFh
Return: DL = video adapter type
            00h original Hercules
            01h Hercules Plus    (port 03BAh reads x001xxxxx)
            02h Hercules InColor (port 03BAh reads x101xxxxx)
            FFh not a Hercules-compatible card (port 03BAh bit 7 not pulsing)
        DH = memory mode byte
            00h "half" mode
            01h "full" mode
            FFh not a Hercules-compatible card
Program: MSHERC.COM/QBHERC.COM is a support program for the Microsoft Quick
          languages which makes their graphics libraries compatible with a
          Hercules card by adding video modes 08h and 88h, and supporting
          text in the new graphics modes.
Notes:  while in mode 08h or 88h, INT 10 supports the Hercules card much like
          a CGA.
        MSHERC performs an installation check by setting DL=FFh and testing
          whether it has been changed on return, which causes it to reinstall
          itself when no HGC is present (or HGC emulation has temporarily been
          disabled); a better installation check would be to use DX=80FFh and
          check whether DX has been changed
        reportedly returns DH=00h on some not-entirely-Hercules-compatible
          cards
Index:  installation check;MSHERC
--------V-10F0-------------------------------
INT 10 - EGA Register Interface Library - READ ONE REGISTER
        AH = F0h
        BL = register number
        BH = 00h
        DX = group index (see #00223)
Return: BL = data
Note:   the RIL is provided by EGA.SYS, the Microsoft Mouse driver, the OS/2
          compatibility box, and others; it is used for software virtualization
          of write-only registers on an EGA video adapter, so that multiple
          programs may peacefully coexist without clobbering each other's
          display settings
SeeAlso: AH=F1h"EGA",AH=F2h"EGA",AH=FAh"EGA",INT 2F/AX=BC00h

(Table 00223)
Values for group index:
 Pointer/data chips
 00h    CRT Controller (25 reg) 3B4h mono modes, 3D4h color modes
 08h    Sequencer (5 registers) 3C4h
 10h    Graphics Controller (9 registers) 3CEh
 18h    Attribute Controller (20 registers) 3C0h
 Single registers
 20h    Miscellaneous Output register 3C2h
 28h    Feature Control register (3BAh mono modes, 3DAh color modes)
 30h    Graphics 1 Position register 3CCh
 38h    Graphics 2 Position register 3CAh
--------V-10F0-------------------------------
INT 10 - VHRBIOS.SYS - INSTALLATION CHECK
        AH = F0h
Return: BX = 4F4Bh ('OK')
Program: VHRBIOS.SYS is a driver for the Micro Display Systems "TheGenius"
          black&white A4/portrait monitor
SeeAlso: AH=F1h"VHRBIOS.SYS",AH=F2h"VHRBIOS.SYS",AH=F4h"VHRBIOS.SYS"
SeeAlso: AH=96h"VHRBIOS.SYS"
--------V-10F1-------------------------------
INT 10 - EGA Register Interface Library - WRITE ONE REGISTER
        AH = F1h
        DX = group index (see #00223)
            if single register:
                BL = value to write
            otherwise
                BL = register number
                BH = value to write
Return: BL = data
Note:   the RIL is provided by EGA.SYS, the Microsoft Mouse driver, the OS/2
          compatibility box, and others
SeeAlso: AX=7F05h,AH=F0h"EGA",AH=F3h"EGA",AH=FAh"EGA"
--------V-10F1-------------------------------
INT 10 - VHRBIOS.SYS - SET REVERSE VIDEO
        AH = F1h
        AL = new video state 
            (bit 5 set for black text on white, clear for white on black)
Return: ???
Program: VHRBIOS.SYS is a driver for the Micro Display Systems "TheGenius"
          black&white A4/portrait monitor
SeeAlso: AH=F0h"VHRBIOS.SYS",AH=F3h"VHRBIOS.SYS"
--------V-10F2-------------------------------
INT 10 - EGA Register Interface Library - READ REGISTER RANGE
        AH = F2h
        CH = starting register number
        CL = number of registers (>1)
        DX = group index (00h,08h,10h,18h) (see #00223)
        ES:BX -> buffer, CL bytes
Return: nothing
Note:   the RIL is provided by EGA.SYS, the Microsoft Mouse driver, the OS/2
          compatibility box, and others
SeeAlso: AH=F0h"EGA",AH=F3h"EGA",AH=FAh"EGA"
--------V-10F2-------------------------------
INT 10 - VHRBIOS.SYS - ???
        AH = F2h
Return: ???
Program: VHRBIOS.SYS is a driver for the Micro Display Systems "TheGenius"
          black&white A4/portrait monitor
SeeAlso: AH=F0h"VHRBIOS.SYS",AH=F4h"VHRBIOS.SYS"
--------V-10F3-------------------------------
INT 10 - EGA Register Interface Library - WRITE REGISTER RANGE
        AH = F3h
        CH = starting register
        CL = number of registers (>1)
        DX = group index (00h,08h,10h,18h) (see #00223)
        ES:BX -> buffer, CL bytes
Return: nothing
Note:   the RIL is provided by EGA.SYS, the Microsoft Mouse driver, the OS/2
          compatibility box, and others
SeeAlso: AX=7F05h,AH=F1h"EGA",AH=F2h"EGA",AH=F4h"EGA"
--------V-10F3-------------------------------
INT 10 - VHRBIOS.SYS - SWITCH BETWEEN DUAL MONITORS???
        AH = F3h
Return: ???
Program: VHRBIOS.SYS is a driver for the Micro Display Systems "TheGenius"
          black&white A4/portrait monitor
SeeAlso: AH=F0h"VHRBIOS.SYS",AH=F4h"VHRBIOS.SYS",AH=F6h"VHRBIOS.SYS"
--------V-10F4-------------------------------
INT 10 - EGA Register Interface Library - READ REGISTER SET
        AH = F4h
        CX = number of registers to read (>1)
        ES:BX -> table of register records (see #00224)
Return: register values in table filled in
Note:   the RIL is provided by EGA.SYS, the Microsoft Mouse driver, the OS/2
          compatibility box, and others
SeeAlso: AH=F0h"EGA",AH=F2h"EGA",AH=F5h"EGA"

Format of EGA RIL entries in table of register records:
Offset  Size    Description     (Table 00224)
 00h    WORD    group index
                Pointer/data chips
                   00h CRTC (3B4h mono modes, 3D4h color modes)
                   08h Sequencer 3C4h
                   10h Graphics Controller 3CEh
                   18h Attribute Controller 3C0h
                Single registers
                   20h Miscellaneous Output register 3C2h
                   28h Feature Control register (3BAh mono modes, 3DAh color)
                   30h Graphics 1 Position register 3CCh
                   38h Graphics 2 Position register 3CAh
 02h    BYTE    register number (0 for single registers)
 03h    BYTE    register value
--------V-10F4-------------------------------
INT 10 - VHRBIOS.SYS - GET VERSION
        AH = F4h
Return: AX = driver version (AH = major, AL = minor)
Program: VHRBIOS.SYS is a driver for the Micro Display Systems "TheGenius"
          black&white A4/portrait monitor
SeeAlso: AH=F0h"VHRBIOS.SYS",AH=F5h"VHRBIOS.SYS"
--------V-10F5-------------------------------
INT 10 - EGA Register Interface Library - WRITE REGISTER SET
        AH = F5h
        CX = number of registers to write (>1)
        ES:BX -> table of records (see #00224)
Return: nothing
Note:   the RIL is provided by EGA.SYS, the Microsoft Mouse driver, the OS/2
          compatibility box, and others
SeeAlso: AX=7F05h,AH=F1h"EGA",AH=F3h"EGA",AH=F4h"EGA"
--------V-10F5-------------------------------
INT 10 - VHRBIOS.SYS - GET VENDOR ID
        AH = F5h
Return: AXBX = vendor ID (4D44h:5349h = 'MDSI' for Micro Display Systems Inc.)
Program: VHRBIOS.SYS is a driver for the Micro Display Systems "TheGenius"
          black&white A4/portrait monitor
SeeAlso: AH=F0h"VHRBIOS.SYS",AH=F4h"VHRBIOS.SYS",AH=F6h"VHRBIOS.SYS"
--------V-10F6-------------------------------
INT 10 - EGA Register Interface Library - REVERT TO DEFAULT REGISTERS
        AH = F6h
Return: nothing
Note:   provided by the Microsoft Mouse driver, OS/2 compatibility box, and
          others
SeeAlso: AH=F5h"EGA",AH=F7h"EGA"
--------V-10F6-------------------------------
INT 10 - VHRBIOS.SYS - GET INFO
        AH = F6h
        AL = what to get
            00h device driver state
                Return: AX = device driver state
            01h video mode info
                Return: AL = video mode
                        DH = screen height in rows
                        DL = screen width in columns
Program: VHRBIOS.SYS is a driver for the Micro Display Systems "TheGenius"
          black&white A4/portrait monitor
SeeAlso: AH=F0h"VHRBIOS.SYS",AH=F4h"VHRBIOS.SYS",AH=96h"VHRBIOS.SYS
--------V-10F7-------------------------------
INT 10 - EGA Register Interface Library - DEFINE DEFAULT REGISTER TABLE
        AH = F7h
        DX = port number
           Pointer/data chips
              00h CRTC (3B4h mono modes, 3D4h color modes)
              08h Sequencer 3C4h
              10h Graphics Controller 3CEh
              18h Attribute Controller 3C0h
           Single registers
              20h Miscellaneous Output register 3C2h
              28h Feature Control register (3BAh mono modes, 3DAh color modes)
              30h Graphics 1 Position register 3CCh
              38h Graphics 2 Position register 3CAh
        ES:BX -> table of one-byte entries, one byte to be written to each
                 register
Return: nothing
Note:   the RIL is provided by EGA.SYS, the Microsoft Mouse driver, the OS/2
          compatibility box, and others
SeeAlso: AH=F0h"EGA",AH=F6h"EGA"
--------V-10FA--BX0000-----------------------
INT 10 - EGA Register Interface Library - INTERROGATE DRIVER
        AH = FAh
        BX = 0000h
Return: BX = 0000h if RIL driver not present
        ES:BX -> EGA Register Interface version number, if present:
            byte 0 = major release number
            byte 1 = minor release number
Note:   the RIL is provided by EGA.SYS, the Microsoft Mouse driver, the OS/2
          compatibility box, and others
SeeAlso: AH=F0h"EGA",AH=F6h"EGA",INT 2F/AX=BC00h
--------K-10FA-------------------------------
INT 10 - FASTBUFF.COM - INSTALLATION CHECK
        AH = FAh
Return: AX = 00FAh if installed
            ES = segment of resident code
Program: FASTBUFF.COM is a keyboard speedup/screen blanking utility by David
          Steiner
Index:  screen saver;FASTBUFF
--------V-10FE-------------------------------
INT 10 - TopView - GET SHADOW BUFFER
        AH = FEh
        ES:DI -> assumed video buffer
                B800h:0000h color text/CGA graphics, B000h:0000h mono text,
                  or A000h:0000h EGA/VGA graphics (RSIS environments only)
Return: ES:DI -> actual video buffer for calling process
Desc:   Determine the address of the virtual screen to which the program
          should write instead of the actual video memory; this permits
          programs to be multitasked without interfering with each other's
          output, and allows memory managers to move the video memory to
          permit larger programs to be loaded.
Notes:  if no multitasker or RSIS-compliant environment is installed, ES:DI is
          returned unchanged; RSIS is the Relocated Screen Interface
          Specification
        for display pages other than 0, use AH=05h and AH=0Fh to determine
          whether a particular page exists
        TopView requires a call to AH=FFh to notify it that the screen has
          changed; DESQview will check for changes itself until the first call
          to AH=FFh
SeeAlso: AH=05h,AX=5201h,AH=FFh,INT 15/AX=1024h,INT 21/AH=2Bh"DESQview"
SeeAlso: INT 21/AH=ECh"DoubleDOS"
--------V-10FF-------------------------------
INT 10 - TopView - UPDATE SCREEN FROM SHADOW BUFFER
        AH = FFh
        CX = number of consecutive changed characters
        ES:DI -> first changed character in shadow buffer
Return: nothing
Notes:  avoid CX=0000h
        DESQview will discontinue the automatic screen updating initiated by
          AH=FEh after this call
        not supported (ignored) by DESQview/X 1.0x
SeeAlso: AH=93h,AH=FEh
--------E-10FF-------------------------------
INT 10 - DJ GO32.EXE 80386+ DOS extender - VIDEO EXTENSIONS
        AH = FFh
        AL = video mode (see #00225)
Program: GO32.EXE is a DOS extender included as part of the 80386 port of the
          GNU C/C++ compiler by DJ Delorie and distributed as DJGPP
SeeAlso: AH=00h,INT 21/AH=FFh"GO32"

(Table 00225)
Values for GO32 video mode number:
 00h    80x25 text
 01h    default text
 02h    CXxDX text
 03h    biggest text
 04h    320x200 graphics
 05h    default graphics
 06h    CXxDX graphics
 07h    biggest non-interlaced graphics
 08h    biggest graphics
Index:  video modes;GO32
--------V-10FF-------------------------------
INT 10 - VIDEO - Oak VGA BIOS v1.02+ - SET EMULATION
        AH = FFh
        AL = emulation
            43h ('C') CGA emulation
            45h ('E') EGA emulation
            4Dh ('M') Hercules emulation
            56h ('V') VGA emulation
        ES:DI -> signature string "Calamity"
Return: VGA switched to suggested mode
SeeAlso: AH=00h,AX=007Fh/BH=00h,AX=007Fh/BH=02h,AX=5F01h
--------R-10FF00-----------------------------
INT 10 - CARBON COPY PLUS v5.0 - CHECK IF CC CONNECTED TO CCHELP
        AX = FF00h
Return: BL = state
            00h not connected
            01h connected
SeeAlso: AX=FF01h,AX=FF02h
--------R-10FF01-----------------------------
INT 10 - CARBON COPY PLUS v5.0 - DISCONNECT AND RESET LINE
        AX = FF01h
Return: nothing
SeeAlso: AX=FF00h,AX=FF02h
--------R-10FF02-----------------------------
INT 10 - CARBON COPY PLUS v5.0 - GET LAST PHONE NUMBER DIALED
        AX = FF02h
Return: ES:DI -> ASCIZ phone number
SeeAlso: AX=FF00h,AX=FF01h
--------C-11---------------------------------
INT 11 - CPU-generated (80486+) - ALIGNMENT CHECK
Desc:   automatically generated by the CPU when the AC flag is set, the current
          privilege level is 3, and a misaligned memory access (WORD not on an
          even address or DWORD not on a multiple of 4) is made
Note:   not all V86 monitors allow the AC flag to be set, such as Turbo
          Debugger 386
SeeAlso: INT 12"CPU"
--------B-11---------------------------------
INT 11 - BIOS - GET EQUIPMENT LIST
Return: (E)AX = BIOS equipment list word (see #00226,#03215 at INT 4B"Tandy")
Note:   since older BIOSes do not know of the existence of EAX, the high word
          of EAX should be cleared before this call if any of the high bits
          will be tested
SeeAlso: INT 4B"Tandy 2000",MEM 0040h:0010h

Bitfields for BIOS equipment list:
Bit(s)  Description     (Table 00226)
 0      floppy disk(s) installed (number specified by bits 7-6)
 1      80x87 coprocessor installed
 3-2    number of 16K banks of RAM on motherboard (PC only)
        number of 64K banks of RAM on motherboard (XT only)
 2      pointing device installed (PS)
 3      unused (PS)
 5-4    initial video mode
        00 EGA, VGA, or PGA
        01 40x25 color
        10 80x25 color
        11 80x25 monochrome
 7-6    number of floppies installed less 1 (if bit 0 set)
 8      DMA support installed (PCjr, Tandy 1400LT)
        DMA support *not* installed (Tandy 1000's)
 11-9   number of serial ports installed
 12     game port installed
 13     serial printer attached (PCjr)
        internal modem installed (PC/Convertible)
 15-14  number of parallel ports installed
---Compaq, Dell, and many other 386/486 machines--
 23     page tables set so that Weitek coprocessor addressable in real mode
 24     Weitek math coprocessor present
---Compaq Systempro---
 25     internal DMA parallel port available
 26     IRQ for internal DMA parallel port (if bit 25 set)
        0 = IRQ5
        1 = IRQ7
 28-27  parallel port DMA channel
        00 DMA channel 0
        01 DMA channel 0 ???
        10 reserved
        11 DMA channel 3
BUG:    Award BIOS v4.50G and v4.51PG erroneously set bit 0 even if there are
          no floppy drives installed; use two calls to INT 13/AH=15h to
          determine whether any floppies are actually installed
SeeAlso: INT 12"BIOS",#03215 at INT 4B"Tandy 2000"
--------d-11----SI6A6A-----------------------
INT 11 - Columbia Data Products Standard Device Level Protocol (SDLP) 1.6
        SI = 6A6Ah
        AH = command (see #00227)
        AL = SCSI Addressing (see #00228)
Return: CF clear if successful
            DI = 6A6Ah if AH=01h on entry (maybe for all functions???)
            AH = ??? for command 01h
        CF set on error
            AL = error code
SeeAlso: INT 21/AX=4402h"ASPI"

(Table 00227)
Values for SDLP command:
 00h    SDLP initialization
 01h    SDLP System Identify
 02h    simple read sectors
 03h    simple write sectors
 04h    simple verify sectors/seek to sector
 05h    get device size/type
 06h    ready unit
 07h    format unit
 08h    diagnostics
 09h    rewind
 0Ah    erase
 0Bh    write filemarks
 0Ch    space
 0Dh    prevent/allow media removal
 0Eh    load/unload media
 0Fh    reserved - returns good status
 10h    set block size
 11h    write setmark
 12h    set error level
 13h    get address of Request Sense Buffer
 14h    get SDLP error via Request Sense
 F0h    Vendor Unique Function (WD7000-FASST2 only)
 FDh    reset current SCSI HAC
 FEh    get/set current SCSI HAC
 FFh    execute SCSI command

Bitfields for SDLP SCSI addressing:
Bit(s)  Description     (Table 00228)
 7-6    Host Adapter
 5-3    SCSI Target ID
 2-0    SCSI Target LUN (logical unit number)
--------V-110225BX6900-----------------------
INT 11 - Blank-It Screen Blanker - INSTALLATION CHECK
        AX = 0225h
        BX = 6900h
Return: BL = 23h
        ES:DI -> ASCIZ "BLNKIT"
Program: Blank-It is a resident screen blanker by Rhode Island Soft Systems,
          Inc.
SeeAlso: AX=0225h/BX=6902h,AX=0225h/BX=6908h,AX=0225h/BX=6909h,INT 14/AX=AA01h
Index:  screen saver;Blank-It
--------V-110225BX6901-----------------------
INT 11 - Blank-It Screen Blanker - SET TIMEOUT FOR SCREEN BLANKING
        AX = 0225h
        BX = 6901h
        CX = timeout in timer ticks (18.2/second) or 0000h to disable timeout
             largest value is 59 minutes (FBACh or 64428)
Return: CF clear if successful
            DI = 6A6Ah (possibly also 6A6Ah for all following functions)
            AH = ???
        CF set on error
            AL = error code
SeeAlso: AX=0225h/BX=6900h,AX=0225h/BX=6904h
Index:  screen saver;Blank-It
--------V-110225BX6902-----------------------
INT 11 - Blank-It Screen Blanker - ENABLE THE SOFTWARE
        AX = 0225h
        BX = 6902h
Return: CF clear if successful
        CF set on error
            AL = error code
SeeAlso: AX=0225h/BX=6900h,AX=0225h/BX=6903h
Index:  screen saver;Blank-It
--------V-110225BX6903-----------------------
INT 11 - Blank-It Screen Blanker - DISABLE THE SOFTWARE
        AX = 0225h
        BX = 6903h
Return: CF clear if successful
        CF set on error
            AL = error code
SeeAlso: AX=0225h/BX=6900h,AX=0225h/BX=6902h
Index:  screen saver;Blank-It
--------V-110225BX6904-----------------------
INT 11 - Blank-It Screen Blanker - GET BLANKING TIMEOUT
        AX = 0225h
        BX = 6904h
Return: CF clear if successful
            BX = timeout (see AX=0225h/BX=6901h)
        CF set on error
            AL = error code
SeeAlso: AX=0225h/BX=6900h,AX=0225h/BX=6901h
Index:  screen saver;Blank-It
--------V-110225BX6905-----------------------
INT 11 - Blank-It Screen Blanker - ENABLE WINDOWS COMPATIBILITY MODE
        AX = 0225h
        BX = 6905h
Return: CF clear if successful
        CF set on error
            AL = error code
SeeAlso: AX=0225h/BX=6900h,AX=0225h/BX=6906h
Index:  screen saver;Blank-It
--------V-110225BX6906-----------------------
INT 11 - Blank-It Screen Blanker - DISABLE WINDOWS COMPATIBILITY MODE
        AX = 0225h
        BX = 6906h
Return: CF clear if successful
        CF set on error
            AL = error code
Program: Blank-It is a resident screen blanker by Rhode Island Soft Systems,
          Inc.
SeeAlso: AX=0225h/BX=6900h,AX=0225h/BX=6905h
Index:  screen saver;Blank-It
--------V-110225BX6907-----------------------
INT 11 - Blank-It Screen Blanker - UNBLANK THE SCREEN
        AX = 0225h
        BX = 6907h
Return: CF clear if successful
        CF set on error
            AL = error code
SeeAlso: AX=0225h/BX=6900h,AX=0225h/BX=6908h
Index:  screen saver;Blank-It
--------V-110225BX6908-----------------------
INT 11 - Blank-It Screen Blanker - BLANK THE SCREEN
        AX = 0225h
        BX = 6908h
Return: CF clear if successful
        CF set on error
            AL = error code
SeeAlso: AX=0225h/BX=6900h,AX=0225h/BX=6907h
Index:  screen saver;Blank-It
--------V-110225BX6909-----------------------
INT 11 - Blank-It Screen Blanker - SET HOTKEY FOR MANUAL BLANKING
        AX = 0225h
        BX = 6909h
        CL = key scan code (see #00229)
Return: CF clear if successful
        CF set on error
            AL = error code
Program: Blank-It is a resident screen blanker by Rhode Island Soft Systems,
          Inc.
SeeAlso: AX=0225h/BX=6900h
Index:  screen saver;Blank-It|hotkeys;Blank-It

(Table 00229)
Values for Blank-It hotkey scan code:
 00h    No hot key
 1Dh    Left CTRL
 2Ah    Left Shift
 36h    Right Shift
 57h    F11
 58h    F12
SeeAlso: #00006
--------G-1105D7-----------------------------
INT 11 CU - Borland C++ IDE - INSTALLED CALLOUT
        AX = 05D7h
        BX = product ID (0088h)
Note:   called by the BC++ IDE when an application calls
          INT 12/AX=05D7h/BX=05D7h
SeeAlso: INT 12/AX=05D7h/BX=05D7h
Index:  installation check;Borland C++ IDE
--------F-1177-------------------------------
INT 11 - RainbowFAX v1.3 - SFENGINE API - OPERATIONAL CONTROL
        AH = 77h
        AL = subfunction
            01h request SFENGINE start
                Return: AX = 0001h
            02h check if SFENGINE started
                Return: AX = 0000h or 0001h
            03h request SFENGINE stop
                Return: AX = 0001h
            04h check if SFENGINE stopped
                Return: AX = 0000h or 0001h
            05h installation check
                Return: AX = 0001h
            06h uninstall???
                BX:DX -> return address for successful uninstall???
                Return: (at caller's address)
                        AX = 0000h
            else
                Return: AX = FFFFh (invalid subfunction)
Return: ES:DX -> ASCIZ signature string "SFAX ENGINE V1.0"
                followed by internal data area???
SeeAlso: AH=78h,AH=79h,AH=7Ah,AH=7Ch
Index:  installation check;RainbowFAX|installation check;SFENGINE
Index:  uninstall;RainbowFAX|uninstall;SFENGINE
--------F-1178-------------------------------
INT 11 - RainbowFAX v1.3 - SFENGINE API - ???
        AH = 78h
        AL = subfunction
            01h set ???
                BX = new state for ???
                    0000h ???
                    else ???
                Return: AX = 0001h
            02h set ???
                BX = ???
                CX = ???
                Return: AX = 0001h
            03h set ???
                BX = new state for ???
                    0000h ???
                    else ???
                Return: AX = 0001h
            else
                Return: AX = FFFFh (invalid subfunction)
SeeAlso: AH=77h,AH=79h,AH=7Ah,AH=7Ch
--------F-1179-------------------------------
INT 11 - RainbowFAX v1.3 - SFENGINE API - ???
        AH = 79h
        AL = subfunction
            01h set ??? flag
                Return: AX = previous state (0000h already set, 0001h clear)
            02h clear ??? flag (refer to subfunc 01h)
                Return: AX = 0001h
            03h set ??? flag (different from subfn 02h or 04h)
                Return: AX = 0001h
            04h clear ??? flag (different from subfn 02h or 03h)
                Return: AX = 0001h
            else
                Return: AX = FFFFh (invalid subfunction)
SeeAlso: AH=77h,AH=78h,AH=7Ah,AH=7Ch
--------F-117A-------------------------------
INT 11 - RainbowFAX v1.3 - SFENGINE API - ???
        AH = 7Ah
        AL = subfunction
            01h set ??? flag
                Return: AX = previous state (0000h already set, 0001h clear)
            02h clear ??? flag
                Return: AX = 0001h
            03h set ??? flag (different from subfn 02h)
                Return: AX = 0001h
            else
                Return: AX = FFFFh (invalid subfunction)
SeeAlso: AH=77h,AH=78h,AH=79h,AH=7Ch
--------F-117C01-----------------------------
INT 11 - RainbowFAX v1.3 - SFENGINE API - SET ??? FLAG
        AX = 7C01h
Return: AX = 0001h
SeeAlso: AH=77h,AH=78h,AH=79h,AH=7Ah,AX=7C02h,AX=7C03h
--------F-117C02-----------------------------
INT 11 - RainbowFAX v1.3 - SFENGINE API - CLEAR ??? FLAG
        AX = 7C02h
Return: AX = 0001h
SeeAlso: AH=77h,AH=78h,AH=79h,AH=7Ah,AX=7C01h,AX=7C03h
--------F-117C03-----------------------------
INT 11 - RainbowFAX v1.3 - SFENGINE API - UNSUPPORTED FUNCTIONS
        AX = 7C03h-7CFFh
Return: AX = FFFFh
SeeAlso: AH=77h,AX=7C01h,AX=7C02h
--------S-11BC--DX1954-----------------------
INT 11 - BNU FOSSIL - INSTALLATION CHECK
        AH = BCh
        DX = 1954h
Return: AX = 1954h
        ES:DX -> entry point of driver (instead of INT 14)
SeeAlso: INT 14/AH=04h"FOSSIL"
--------d-11FF--SI6A6A-----------------------
INT 11 - WD7000 SDLP interface - EXECUTE GENERIC SCSI COMMAND
        AH = FFh
        SI = 6A6Ah
        AL = SCSI Addressing (see #00230)
        CX = bytes of data to be transmitted (max FFF0h)
        DH = 00h
        DL = length of SCSI Command Descriptor Block
        DS:DI -> SCSI Command Descriptor Block
        ES:BX -> data buffer
Return: CF set on error
            AL = error code
        CF clear if successful
Note:   because of busmaster operations with WD7000FASST avoid accessing
          video memory directly; check 386 memory manager for VDS support.
          The WD7000XTAT works with programmed IO and does not have this
          limitation.
SeeAlso: INT 21/AX=4402h"ASPI",INT 2F/AX=7F01h

Bitfields for SDLP SCSI addressing:
Bit(s)  Description     (Table 00230)
 2-0    SCSI Target LUN (logical unit number)
 5-3    SCSI Target ID
 7      write flag, set for write operations, clear otherwise
--------T-11FFFECXFFFE-----------------------
INT 11 - BACK&FORTH (before v1.62) API
        AX = FFFEh
        CX = FFFEh
        BX = function
            00h installation check
                Return: AX = installation state
                            0001h BNFHIGH and BNFLOW both loaded
                            0003h only BNFHIGH loaded
                            else neither loaded
            01h ???
                Return: DX:AX -> ???
            02h ???
            03h ???
            04h ???
            05h ??? switches current PSP segment and stack if BNFLOW has not
                    yet announced itself installed
            06h ???
                Return: AX = ???
SeeAlso: INT 12/AX=FFFEh
Index:  installation check;BACK&FORTH
--------B-12---------------------------------
INT 12 - BIOS - GET MEMORY SIZE
Return: AX = kilobytes of contiguous memory starting at absolute address 00000h
Note:   this call returns the contents of the word at 0040h:0013h; in PC and
          XT, this value is set from the switches on the motherboard
SeeAlso: INT 11"BIOS",INT 2F/AX=4A06h,INT 4C"Tandy 2000",MEM 0040h:0013h
--------C-12---------------------------------
INT 12 - CPU-generated (Pentium) - MACHINE CHECK EXCEPTION
Notes:  Intel documents this interrupt as CPU model-dependent; for current
          Pentium processors, the reason for the machine check exception may
          be read from model-specific registers 00h and 01h (described, for
          example, in Christian Ludloff's 4P package)
        this exception is enabled by bit 6 of CR4
SeeAlso: INT 11"CPU",MSR 00000000h,MSR 00000001h
--------K-12----CX1806-----------------------
INT 12 - KEYBUI v2.0+ - INSTALLATION CHECK
        CX = 1806h
Return: AX = kilobytes of contiguous memory starting at absolute address 00000h
        CX = 1960h if installed
Program: KEYBUI is a resident keyboard driver by Johan Zwiekhorst which allows
          accented characters and box drawing on standard QWERTY keyboards; it
          also provides break-to-DOS and screen blanking capabilities
SeeAlso: INT 14/AX=AA01h
Index:  screen saver;KEYBUI
--------d-12----CX1807-----------------------
INT 12 - PARKER v2.0+ - INSTALLATION CHECK
        CX = 1807h
Return: AX = kilobytes of contiguous memory starting at absolute address 00000h
        CX = 1961h if installed
Program: PARKER is an optionally-resident hard disk parking program by Johan
          Zwiekhorst
--------G-1205D7BX05D7-----------------------
INT 12 U - Borland C++ IDE - INSTALLATION CHECK
        AX = 05D7h (1495d)
        BX = 05D7h
Note:   the BC++ IDE will call INT 11/AX=05D7h/BX=0088h if it is loaded
SeeAlso: INT 11/AX=05D7h
--------v-124350BX4920-----------------------
INT 12 C - CPI-standard virus - "FRIEND" CHECK
        AX = 4350h
        BX = 4920h
        CX = AB46h
        DX = 554Eh
Return: if friendly (not to be infected)
            CX:DX -> ASCIZ identity code (changes yearly)
SeeAlso: INT 13/AX=EC00h"VIRUS",INT 13/AX=5001h,INT 21/AX=0B56h
--------T-12FFFECXFFFE-----------------------
INT 12 - Back&Forth v1.62+ - API
        AX = FFFEh
        CX = FFFEh
        BX = function
            00h installation check
                Return: AX = 0001h installed
                             else  not loaded
            01h (reserved)
            02h build program ID list (shareware Back&Forth)
                ES:DI -> buffer of at least 100 bytes, to be filled with words
                Return: AX = number of programs defined
                        ES:DI buffer filled with AX words
            02h get memory statistics (Back&Forth Professional)
                Return: AX = available swap memory, KBytes
                        BX = maximum task size, KBytes
                        DX = fixed overhead per task, excluding video/macro
                              storage
            03h switch to specified task (task need not be open yet)
                DX = two-letter program ID
                Return: AX = status
                            0000h if task undefined
                            0001h task switch will occur when safe
            04h (reserved)
            05h (reserved)
            06h get version (documented only for Back&Forth Professional)
                Return: AX = version * 100 (v1.71 = 00ABh)
            07h spawn program (Back&Forth Professional only???)
                ES:DI -> BF_SPAWN record (see #00232)
                Return: AX = status
                            0000h if no task handles free
                            0001h spawn will occur when safe
            08h get open tasks (documented only for Back&Forth Professional)
                ES:DI -> task info buffer (see #00231,#00233)
                Return: AX = number of open tasks (max 20)
                Note:   the supplied buffer must be large enough to hold 21
                          task entries
            09h (reserved)
            ---Back&Forth Professional---
            0Ah get active clipboard filename
                Return: DX:AX -> ASCIZ clipboard filename
            0Bh get active task number
                AX = active task number (00h-13h)
                BX = number of tasks allocated
                DX = maximum number of tasks
            0Ch (reserved)
            0Dh (reserved)
            0Eh (reserved)
            0Fh stuff string into keyboard buffer
                ES:DI -> ASCIZ string to be stuffed
                Return: nothing
            10h check if in graphics mode
                Return: AX = state
                            0000h color text mode
                            0004h mono text mode
                            FFFFh graphics mode
            11h get Back&Forth Professional user number
                Return: AX = user number (0000h-00FFh)
            12h switch task by task number
                DX = task number
                Return: AX = status
                            0000h attempted to switch to active task
                            0001h task switch will occur when safe
                            FFFFh invalid task number
            13h delete (kill) task
                DX = task number
                Return: AX = status
                            0000h attempted to delete the active task
                            0001h successfully deleted
                            FFFFh invalid task number
                Note:   the active task number will change if the deleted task
                          was lower in the task list than the active task
            14h get next available task handle
                Return: AX = next available task handle
                            FFFFh if task table is full
Program: Back & Forth is a task switcher by Progressive Solutions, Inc.
SeeAlso: INT 11/AX=FFFEh
Index:  installation check;BACK&FORTH

Format of Back&Forth task info buffer:
Offset  Size    Description     (Table 00231)
 00h 21 BYTEs   ASCIZ task name
 15h    BYTE    hotkey shift state (as for INT 16/AH=02h)
 16h    WORD    hotkey scan code (see also #00006)
 18h    WORD    program ID
Index:  hotkeys;Back&Forth
SeeAlso: #00232,#00233

Format of Back&Forth Professional BF_SPAWN record:
Offset  Size    Description     (Table 00232)
 00h 21 BYTEs   task description
 15h    BYTE    flag: disable hotkeys
 16h    WORD    environment size in bytes
 18h    BYTE    hotkey shift flags
 19h    WORD    hotkey scancode
 1Bh    WORD    maximum number of EMS pages
 1Dh    WORD    required memory in KBytes
 1Fh  3 BYTEs   DESQview-style two-letter program ID
 22h 13 BYTEs   base name of program to be run (no path or extension)
 2Fh 66 BYTEs   directory from which to start program
 71h 66 BYTEs   initial current directory for program
SeeAlso: #00231,#00233

Format of Back&Forth Professional BF_TASK record:
Offset  Size    Description     (Table 00233)
 00h    DWORD   Unix-style task start time (seconds since 1/1/1970)
 04h 21 BYTEs   task description
 19h    DWORD   elapsed time in task (seconds)
 1Dh    WORD    task ID
 1Fh    BYTE    task hotkey keyboard flags
 20h    WORD    task hotkey scan code (see also #00006)
 22h    DWORD   time task was suspended/exited
 26h    WORD    task handle
SeeAlso: #00231,#00232
--------B-1300-------------------------------
INT 13 - DISK - RESET DISK SYSTEM
        AH = 00h
        DL = drive (if bit 7 is set both hard disks and floppy disks reset)
Return: AH = status (see #00234)
        CF clear if successful (returned AH=00h)
        CF set on error
Note:   forces controller to recalibrate drive heads (seek to track 0)
        for PS/2 35SX, 35LS, 40SX and L40SX, as well as many other systems,
          both the master drive and the slave drive respond to the Reset
          function that is issued to either drive
SeeAlso: AH=0Dh,AH=11h,INT 21/AH=0Dh,INT 4D/AH=00h"TI Professional"
SeeAlso: INT 56"Tandy 2000",MEM 0040h:003Eh
--------B-1301-------------------------------
INT 13 - DISK - GET STATUS OF LAST OPERATION
        AH = 01h
        DL = drive (bit 7 set for hard disk)
Return: CF clear if successful (returned status 00h)
        CF set on error
        AH = status of previous operation (see #00234)
Note:   some BIOSes return the status in AL; the PS/2 Model 30/286 returns the
          status in both AH and AL
SeeAlso: AH=00h,INT 4D/AH=01h,MEM 0040h:0041h,MEM 0040h:0074h

(Table 00234)
Values for disk operation status:
 00h    successful completion
 01h    invalid function in AH or invalid parameter
 02h    address mark not found
 03h    disk write-protected
 04h    sector not found/read error
 05h    reset failed (hard disk)
 05h    data did not verify correctly (TI Professional PC)
 06h    disk changed (floppy)
 07h    drive parameter activity failed (hard disk)
 08h    DMA overrun
 09h    data boundary error (attempted DMA across 64K boundary or >80h sectors)
 0Ah    bad sector detected (hard disk)
 0Bh    bad track detected (hard disk)
 0Ch    unsupported track or invalid media
 0Dh    invalid number of sectors on format (PS/2 hard disk)
 0Eh    control data address mark detected (hard disk)
 0Fh    DMA arbitration level out of range (hard disk)
 10h    uncorrectable CRC or ECC error on read
 11h    data ECC corrected (hard disk)
 20h    controller failure
 31h    no media in drive (IBM/MS INT 13 extensions)
 32h    incorrect drive type stored in CMOS (Compaq)
 40h    seek failed
 80h    timeout (not ready)
 AAh    drive not ready (hard disk)
 B0h    volume not locked in drive (INT 13 extensions)
 B1h    volume locked in drive (INT 13 extensions)
 B2h    volume not removable (INT 13 extensions)
 B3h    volume in use (INT 13 extensions)
 B4h    lock count exceeded (INT 13 extensions)
 B5h    valid eject request failed (INT 13 extensions)
 BBh    undefined error (hard disk)
 CCh    write fault (hard disk)
 E0h    status register error (hard disk)
 FFh    sense operation failed (hard disk)
SeeAlso: #M0022
--------B-1302-------------------------------
INT 13 - DISK - READ SECTOR(S) INTO MEMORY
        AH = 02h
        AL = number of sectors to read (must be nonzero)
        CH = low eight bits of cylinder number
        CL = sector number 1-63 (bits 0-5)
             high two bits of cylinder (bits 6-7, hard disk only)
        DH = head number
        DL = drive number (bit 7 set for hard disk)
        ES:BX -> data buffer
Return: CF set on error
            if AH = 11h (corrected ECC error), AL = burst length
        CF clear if successful
        AH = status (see #00234)
        AL = number of sectors transferred (only valid if CF set for some
              BIOSes)
Notes:  errors on a floppy may be due to the motor failing to spin up quickly
          enough; the read should be retried at least three times, resetting
          the disk with AH=00h between attempts
        most BIOSes support "multitrack" reads, where the value in AL
          exceeds the number of sectors remaining on the track, in which
          case any additional sectors are read beginning at sector 1 on
          the following head in the same cylinder; the MSDOS CONFIG.SYS command
          MULTITRACK (or the Novell DOS DEBLOCK=) can be used to force DOS to
          split disk accesses which would wrap across a track boundary into two
          separate calls
        the IBM AT BIOS and many other BIOSes use only the low four bits of
          DH (head number) since the WD-1003 controller which is the standard
          AT controller (and the controller that IDE emulates) only supports
          16 heads
        AWARD AT BIOS and AMI 386sx BIOS have been extended to handle more
          than 1024 cylinders by placing bits 10 and 11 of the cylinder number
          into bits 6 and 7 of DH
        under Windows95, a volume must be locked (see INT 21/AX=440Dh/CX=084Bh)
          in order to perform direct accesses such as INT 13h reads and writes
        all versions of MS-DOS (including v7 [Win95]) have a bug which prevents
          booting on hard disks with 256 heads, so many modern BIOSes provide
          mappings with at most 255 heads
SeeAlso: AH=03h,AH=0Ah,AH=06h"V10DISK.SYS",AH=21h"PS/1",AH=42h"IBM"
SeeAlso: INT 21/AX=440Dh/CX=084Bh,INT 4D/AH=02h
--------B-1303-------------------------------
INT 13 - DISK - WRITE DISK SECTOR(S)
        AH = 03h
        AL = number of sectors to write (must be nonzero)
        CH = low eight bits of cylinder number
        CL = sector number 1-63 (bits 0-5)
             high two bits of cylinder (bits 6-7, hard disk only)
        DH = head number
        DL = drive number (bit 7 set for hard disk)
        ES:BX -> data buffer
Return: CF set on error
        CF clear if successful
        AH = status (see #00234)
        AL = number of sectors transferred
              (only valid if CF set for some BIOSes)
Notes:  errors on a floppy may be due to the motor failing to spin up quickly
          enough; the write should be retried at least three times, resetting
          the disk with AH=00h between attempts
        most BIOSes support "multitrack" writes, where the value in AL
          exceeds the number of sectors remaining on the track, in which
          case any additional sectors are written beginning at sector 1 on
          the following head in the same cylinder; the CONFIG.SYS command
          MULTITRACK can be used to force DOS to split disk accesses which
          would wrap across a track boundary into two separate calls
        the IBM AT BIOS and many other BIOSes use only the low four bits of
          DH (head number) since the WD-1003 controller which is the standard
          AT controller (and the controller that IDE emulates) only supports
          16 heads
        AWARD AT BIOS and AMI 386sx BIOS have been extended to handle more
          than 1024 cylinders by placing bits 10 and 11 of the cylinder number
          into bits 6 and 7 of DH
        under Windows95, an application must issue a physical volume lock on
          the drive via INT 21/AX=440Dh before it can successfully write to
          the disk with this function
SeeAlso: AH=02h,AH=0Bh,AH=07h"V10DISK.SYS",AH=22h"PS/1",AH=43h"IBM"
SeeAlso: INT 21/AX=440Dh"DOS 3.2+",INT 4D/AH=03h
--------B-1304-------------------------------
INT 13 - DISK - VERIFY DISK SECTOR(S)
        AH = 04h
        AL = number of sectors to verify (must be nonzero)
        CH = low eight bits of cylinder number
        CL = sector number 1-63 (bits 0-5)
             high two bits of cylinder (bits 6-7, hard disk only)
        DH = head number
        DL = drive number (bit 7 set for hard disk)
        ES:BX -> data buffer (PC,XT,AT with BIOS prior to 11/15/85)
Return: CF set on error
        CF clear if successful
        AH = status (see #00234)
        AL = number of sectors verified
Notes:  errors on a floppy may be due to the motor failing to spin up quickly
          enough; the write should be retried at least three times, resetting
          the disk with AH=00h between attempts
        this function does not compare the disk with memory, it merely
          checks whether the sector's stored CRC matches the data's actual CRC
        the IBM AT BIOS and many other BIOSes use only the low four bits of
          DH (head number) since the WD-1003 controller which is the standard
          AT controller (and the controller that IDE emulates) only supports
          16 heads
        AWARD AT BIOS and AMI 386sx BIOS have been extended to handle more
          than 1024 cylinders by placing bits 10 and 11 of the cylinder number
          into bits 6 and 7 of DH
SeeAlso: AH=02h,AH=44h,INT 4D/AH=04h,INT 4D/AH=06h
--------B-1305-------------------------------
INT 13 - FLOPPY - FORMAT TRACK
        AH = 05h
        AL = number of sectors to format
        CH = track number
        DH = head number
        DL = drive number
        ES:BX -> address field buffer (see #00235)
Return: CF set on error
        CF clear if successful
        AH = status (see #00234)
Notes:  on AT or higher, call AH=17h first
        the number of sectors per track is read from the diskette parameter
          table pointed at by INT 1E
SeeAlso: AH=05h"FIXED",AH=17h,AH=18h,INT 1E

Format of floppy format address field buffer entry (one per sector in track):
Offset  Size    Description     (Table 00235)
 00h    BYTE    track number
 01h    BYTE    head number (0-based)
 02h    BYTE    sector number
 03h    BYTE    sector size (00h=128 bytes, 01h=256 bytes, 02h=512, 03h=1024)
--------B-1305-------------------------------
INT 13 - FIXED DISK - FORMAT TRACK
        AH = 05h
        AL = interleave value (XT-type controllers only)
        ES:BX -> 512-byte format buffer
                the first 2*(sectors/track) bytes contain F,N for each sector
                   F = sector type
                        00h for good sector
                        20h to unassign from alternate location
                        40h to assign to alternate location
                        80h for bad sector
                   N = sector number
        CH = cylinder number (bits 8,9 in high bits of CL)
        CL = high bits of cylinder number (bits 7,6)
        DH = head
        DL = drive
Return: CF set on error
        CF clear if successful
        AH = status code (see #00234)
Notes:  AWARD AT BIOS and AMI 386sx BIOS have been extended to handle more
          than 1024 cylinders by placing bits 10 and 11 of the cylinder number
          into bits 6 and 7 of DH
        for XT-type controllers on an AT or higher, AH=0Fh should be called
          first
        the IBM AT BIOS and many other BIOSes use only the low four bits of
          DH (head number) since the WD-1003 controller which is the standard
          AT controller (and the controller that IDE emulates) only supports
          16 heads
        not all controller support sector types 20h and 40h
        under Windows95, an application must issue a physical volume lock on
          the drive via INT 21/AX=440Dh before it can successfully write to
          the disk with this function
SeeAlso: AH=05h"FLOPPY",AH=06h"FIXED",AH=07h"FIXED",AH=0Fh,AH=18h,AH=1Ah
--------d-1305-------------------------------
INT 13 - Future Domain SCSI BIOS - SEND SCSI MODE SELECT COMMAND
        AH = 05h
        DL = hard drive ID
        ES:BX -> mode select data (see #00236)
Return: CF set on error
        CF clear if successful
        AH = status code (see #00234)
Notes:  this function can be called before AH=07h"SCSI" or AH=06h"SCSI" to
          format a SCSI disk with the desired parameters
        the mode select data below is from the SCSI-1 specification
        the TMC-950 does not support any Future Domain BIOS calls; instead,
          it provides a full CAM implementation (see INT 4F/AX=8100h)
SeeAlso: AH=06h"SCSI",AH=07h"SCSI",INT 4F/AX=8100h

Format of Future Domain SCSI mode select data:
Offset  Size    Description     (Table 00236)
 00h    BYTE    number of bytes of remaining data (12 + vendor unique length)
 01h    BYTE    reserved (0)
 02h    BYTE    medium type (0 for hard disk)
 03h    BYTE    reserved (0)
 04h    BYTE    block descriptor length (8)
 05h    BYTE    density code (0 for hard disk)
 06h  3 BYTEs   (big-endian) number of blocks (000000h for entire disk)
 09h    BYTE    reserved (0)
 0Ah  3 BYTEs   (big-endian) block length (512 standard, or 256)
 0Dh    ???     vendor-specific parameter bytes (optional)
--------d-13057FSI324D-----------------------
INT 13 - 2M - FORMAT TRACK
        AX = 057Fh
        SI = 324Dh ("2M")
        CH = track number
        DH = head number
        DL = drive number
        ES:BX -> boot sector of future 2M diskette
Return: CF set on error
        CF clear if successful
        AH = status (see #00234)
Program: 2M is a TSR developed by Ciriaco Garcia de Celis to support
          non standard diskettes with 820-902/1476-1558K (5.25 DD/HD)
          and 984-1066/1804-1886K/3608-3772K (3.5 DD/HD/ED)
InstallCheck: must search for a "CiriSOFT:2M:1.3" or "CiriSOFT:2MX:3.0" or
          similar (recomended ":2M:", ":2MX:", or ":2MB:" substrings) in the
          CiriSOFT TSR interface
Notes:  it is not necessary to call AH=17h or AH=18h first (will be ignored)
        the diskette format must always begin on cylinder 0 head 0
        the boot sector can be obtained from an already-formatted 2M diskette
          (by calling AH=02h with head number 00h in 2M v1.x and with head
          number 80h for 2M v2+)
        since 2M v2.0, the BOOT sector is emulated using the first physical
          sector of FAT2; the second-sixth physical sectors of FAT2 in HD or ED
          diskettes store the SuperBOOT code. To skip the FAT2 emulation (using
          FAT1) of 2M, in order to read the SuperBOOT code, head number must be
          80h-81h instead 0-1 (bit 7 active) in standard read/write functions.
          This lets diskcopy programs format 2M target diskettes copying
          SuperBOOT code. If the target diskette is already 2MF formatted
          (containing boot code) this trick it is not necessary.
        when using STV technology (offset 65 of boot sector equal to 1) it is
          necessary to write the full track before formatting (except track 0
          side 0) to complete the format and skip future CRC errors on read; in
          track 0 side 1 the head used must be 81h instead 1. Diskcopy programs
          may do a format-write-verify sequential phases to improve performance
SeeAlso: AH=05h"FLOPPY",AH=18h/CX=5055h,INT 2F"CiriSOFT"
--------B-1306-------------------------------
INT 13 - FIXED DISK - FORMAT TRACK AND SET BAD SECTOR FLAGS (XT,PORT)
        AH = 06h
        AL = interleave value
        CH = cylinder number (bits 8,9 in high bits of CL)
        CL = sector number
        DH = head
        DL = drive
Return: AH = status code (see #00234)
Note:   AWARD AT BIOS and AMI 386sx BIOS have been extended to handle more
          than 1024 cylinders by placing bits 10 and 11 of the cylinder number
          into bits 6 and 7 of DH
SeeAlso: AH=05h"FIXED",AH=07h"FIXED"
--------d-1306-------------------------------
INT 13 - Future Domain SCSI BIOS - FORMAT DRIVE WITH BAD SECTOR MAPPING
        AH = 06h
        AL = interleave
             (0 = default, 1 = consecutive sectors, 2 - 255 = vendor unique)
        DL = hard drive ID
        DH = defect list info (see #00237)
        ES:BX -> defect table A, B or C (see #00238,#00239,#00240)
Return: CF set on error
        CF clear if successful
        AH = status code (see #00234)
Notes:  block addresses must be in ascending order (for table B, cylinder is
          most significant, byte from index least significant; for table C,
          cylinder is most significant, sector number least significant)
        table B defect bytes from index of FFFFFFFFh indicates that the entire
          track shall be reassigned
        table C defect sector number of FFFFFFFFh indicates that the entire
          track shall be reassigned
        the TMC-950 does not support any Future Domain BIOS calls; instead,
          it provides a full CAM implementation (see INT 4F/AX=8100h)
SeeAlso: AH=05h"SCSI",AH=06h"FIXED",AH=07h"SCSI"

Bitfields for Future Domain SCSI defect list info:
Bit(s)  Description     (Table 00237)
 7-5    drive LUN
 4      defect list is available
 3      defect list is complete (erase drive's defect list)
 2-0    defect table format
        (000=use defect table A, 100=use defect table B,
         101=use defect table C)

Format of Future Domain SCSI defect table A:
Offset  Size    Description     (Table 00238)
 00h    WORD    number of bytes remaining in table
 02h    BYTE    reserved (0)
 03h    BYTE    reserved (0)
 04h    WORD    (big-endian) defect list length (4*number of defects)
 06h  4 DWORDs  (big-endian) defect block addresses

Format of Future Domain SCSI defect table B:
Offset  Size    Description     (Table 00239)
 00h    WORD    number of bytes remaining in table
 02h    BYTE    reserved (0)
 03h    BYTE    reserved (0)
 04h    WORD    (big-endian) defect list length (8*number of defects)
 06h 8N BYTEs   defect list [array] (see #00241)

Format of Future Domain SCSI defect table C:
Offset  Size    Description     (Table 00240)
 00h    WORD    number of bytes remaining in table
 02h    BYTE    reserved (0)
 03h    BYTE    reserved (0)
 04h    WORD    (big-endian) defect list length (8*number of defects)
 06h 8N BYTEs   defect list [array] (see #00241)

Format of Future Domain SCSI defect list entry:
Offset  Size    Description     (Table 00241)
 00h  3 BYTEs   (big-endian) cylinder number of defect
 03h    BYTE    head number of defect
 04h    DWORD   (big-endian) defect bytes from index
--------d-1306-------------------------------
INT 13 - Adaptec AHA-154xA/Bustek BT-542 BIOS - IDENTIFY SCSI DEVICES
        AH = 06h
Return: AH = status code (see #00234)
        CF clear if successful
            AL = first drive supported
                (80h nonconcurrent operation, 81h concurrent operation)
        CF set on error
Desc:   determine the number of the first supported SCSI drive
Note:   the return value is 80h when two SCSI drives are supported, 81h if
          only one SCSI drive is installed
SeeAlso: AH=08h"PC",#00732 at INT 1A/AX=B102h
--------d-1306-------------------------------
INT 13 - V10DISK.SYS - READ DELETED SECTORS
        AH = 06h
        AL = number of sectors
        CH = cylinder number (bits 8,9 in high bits of CL)
        CL = sector number
        DH = head
        DL = drive
        ES:BX -> buffer
Return: AH = status code (see #00234)
Program: V10DISK.SYS is a driver for the Flagstaff Engineering 8" floppies
SeeAlso: AH=02h,AH=07h"V10DISK.SYS"
--------B-1307-------------------------------
INT 13 - FIXED DISK - FORMAT DRIVE STARTING AT GIVEN TRACK (XT,PORT)
        AH = 07h
        AL = interleave value (XT only)
        ES:BX = 512-byte format buffer (see AH=05h)
        CH = cylinder number (bits 8,9 in high bits of CL)
        CL = sector number
        DH = head
        DL = drive
Return: AH = status code (see #00234)
Note:   AWARD AT BIOS and AMI 386sx BIOS have been extended to handle more
          than 1024 cylinders by placing bits 10 and 11 of the cylinder number
          into bits 6 and 7 of DH
SeeAlso: AH=05h"FIXED",AH=06h"FIXED",AH=1Ah
--------d-1307-------------------------------
INT 13 - Future Domain SCSI BIOS - FORMAT DRIVE
        AH = 07h
        AL = interleave (0 = default, 1 = consecutive sectors,
               2 - 255 = vendor unique)
        DL = hard drive ID
Return: CF set on error
        CF clear if successful
        AH = status code (see #00234)
SeeAlso: AH=05h"SCSI",AH=06h"SCSI",AH=07h"FIXED"
--------d-1307-------------------------------
INT 13 - V10DISK.SYS - WRITE DELETED SECTORS
        AH = 07h
        AL = number of sectors
        CH = cylinder number (bits 8,9 in high bits of CL)
        CL = sector number
        DH = head
        DL = drive
        ES:BX -> buffer
Return: AH = status code (see #00234)
Program: V10DISK.SYS is a driver for the Flagstaff Engineering 8" floppies
SeeAlso: AH=03h,AH=06h"V10DISK.SYS"
--------B-1308-------------------------------
INT 13 - DISK - GET DRIVE PARAMETERS (PC,XT286,CONV,PS,ESDI,SCSI)
        AH = 08h
        DL = drive (bit 7 set for hard disk)
Return: CF set on error
            AH = status (07h) (see #00234)
        CF clear if successful
            AH = 00h
            AL = 00h on at least some BIOSes
            BL = drive type (AT/PS2 floppies only) (see #00242)
            CH = low eight bits of maximum cylinder number
            CL = maximum sector number (bits 5-0)
                 high two bits of maximum cylinder number (bits 7-6)
            DH = maximum head number
            DL = number of drives
            ES:DI -> drive parameter table (floppies only)
Notes:  may return successful even though specified drive is greater than the
          number of attached drives of that type (floppy/hard); check DL to
          ensure validity
        for systems predating the IBM AT, this call is only valid for hard
          disks, as it is implemented by the hard disk BIOS rather than the
          ROM BIOS
        Toshiba laptops with HardRAM return DL=02h when called with DL=80h,
          but fail on DL=81h.  The BIOS data at 40h:75h correctly reports 01h.
        may indicate only two drives present even if more are attached; to
          ensure a correct count, one can use AH=15h to scan through possible
          drives
        for BIOSes which reserve the last cylinder for testing purposes, the
          cylinder count is automatically decremented
        on PS/1s with IBM ROM DOS 4, nonexistent drives return CF clear,
          BX=CX=0000h, and ES:DI = 0000h:0000h
        the PC-Tools PCFORMAT program requires that AL=00h before it will
          proceed with the formatting
BUG:    several different Compaq BIOSes incorrectly report high-numbered
          drives (such as 90h, B0h, D0h, and F0h) as present, giving them the
          same geometry as drive 80h; as a workaround, scan through disk
          numbers, stopping as soon as the number of valid drives encountered
          equals the value in 0040h:0075h
SeeAlso: AH=06h"Adaptec",AH=13h"SyQuest",AH=48h,AH=15h,INT 1E
SeeAlso: INT 41"HARD DISK 0"

(Table 00242)
Values for diskette drive type:
 01h    360K
 02h    1.2M
 03h    720K
 04h    1.44M
 05h    ??? (reportedly an obscure drive type shipped on some IBM machines)
        2.88M on some machines (at least AMI 486 BIOS)
 06h    2.88M
 10h    ATAPI Removable Media Device
--------d-1308-------------------------------
INT 13 - V10DISK.SYS - SET FORMAT
        AH = 08h
        AL = number of sectors
        CH = cylinder number (bits 8,9 in high bits of CL)
        CL = sector number
        DH = head
        DL = drive
Return: AH = status code (see #00234)
Program: V10DISK.SYS is a driver for the Flagstaff Engineering 8" floppies
Note:   details not available
SeeAlso: AH=03h,AH=06h"V10DISK.SYS"
--------y-130800DLF0-------------------------
INT 13 - SecureDrive - INSTALLATION CHECK
        AX = 08000h
        DL = F0h
Return: AX = EDCBh for version 1.0-1.2
        AX = EDCCh for version 1.3
        CX = code segment
        DX = data address within code segment
Program: SecureDrive by Mike Ingle <mikeingle@delphi.com> allows you to create
          an encrypted partition on your harddisk.
--------B-1309-------------------------------
INT 13 - HARD DISK - INITIALIZE CONTROLLER WITH DRIVE PARAMETERS (AT,PS)
        AH = 09h
        DL = drive (80h for first, 81h for second)
Return: CF clear if successful
        CF set on error
        AH = status (see #00234)
Notes:  on the PC and XT, this function uses the parameter table pointed at by
          INT 41
        on the AT and later, this function uses the parameter table pointed at
          by INT 41 if DL=80h, and the parameter table pointed at by INT 46 if
          DL=81h
SeeAlso: INT 41"HARD DISK 0",INT 46"HARD DISK 1"
--------B-130A-------------------------------
INT 13 - HARD DISK - READ LONG SECTOR(S) (AT and later)
        AH = 0Ah
        AL = number of sectors (01h may be only value supported)
        CH = low eight bits of cylinder number
        CL = sector number (bits 5-0)
             high two bits of cylinder number (bits 7-6)
        DH = head number
        DL = drive number (80h = first, 81h = second)
        ES:BX -> data buffer
Return: CF clear if successful
        CF set on error
        AH = status (see #00234)
        AL = number of sectors transferred
Notes:  this function reads in four to seven bytes of error-correcting code
          along with each sector's worth of information
        data errors are not automatically corrected, and the read is aborted
          after the first sector with an ECC error
        used for diagnostics only on PS/2 systems; IBM officially classifies
          this function as optional
SeeAlso: AH=02h,AH=0Bh,MEM 0040h:0074h
--------B-130B-------------------------------
INT 13 - HARD DISK - WRITE LONG SECTOR(S) (AT and later)
        AH = 0Bh
        AL = number of sectors (01h may be only value supported)
        CH = low eight bits of cylinder number
        CL = sector number (bits 5-0)
             high two bits of cylinder number (bits 7-6)
        DH = head number
        DL = drive number (80h = first, 81h = second)
        ES:BX -> data buffer
Return: CF clear if successful
        CF set on error
        AH = status (see #00234)
        AL = number of sectors transferred
Notes:  each sector's worth of data must be followed by four to seven bytes of
          error-correction information
        used for diagnostics only on PS/2 systems; IBM officially classifies
          this function as optional
SeeAlso: AH=03h,AH=0Ah,MEM 0040h:0074h
--------B-130C-------------------------------
INT 13 - HARD DISK - SEEK TO CYLINDER
        AH = 0Ch
        CH = low eight bits of cylinder number
        CL = sector number (bits 5-0)
            high two bits of cylinder number (bits 7-6)
        DH = head number
        DL = drive number (80h = first, 81h = second hard disk)
Return: CF set on error
        CF clear if successful
        AH = status (see #00234)
SeeAlso: AH=00h,AH=02h,AH=0Ah,AH=47h
--------B-130D-------------------------------
INT 13 - HARD DISK - RESET HARD DISKS
        AH = 0Dh
        DL = drive number (80h = first, 81h = second hard disk)
Return: CF set on error
        CF clear if successful
        AH = status (see #00234)
Notes:  reinitializes the hard disk controller, resets the specified drive's
          parameters, and recalibrates the drive's heads (seek to track 0)
        for PS/2 35SX, 35LS, 40SX and L40SX, as well as many other systems,
          both the master drive and the slave drive respond to the Reset
          function that is issued to either drive
        not for PS/2 ESDI drives
SeeAlso: AH=00h,INT 21/AH=0Dh
--------B-130E-------------------------------
INT 13 - HARD DISK - READ SECTOR BUFFER (XT only)
        AH = 0Eh
        DL = drive number (80h = first, 81h = second hard disk)
        ES:BX -> buffer
Return: CF set on error
        CF clear if successful
        AH = status code (see #00234)
Notes:  transfers controller's sector buffer.  No data is read from the drive
        used for diagnostics only on PS/2 systems
SeeAlso: AH=0Ah
--------B-130F-------------------------------
INT 13 - HARD DISK - WRITE SECTOR BUFFER (XT only)
        AH = 0Fh
        DL = drive number (80h = first, 81h = second hard disk)
        ES:BX -> buffer
Return: CF set on error
        CF clear if successful
        AH = status code (see #00234)
Notes:  does not write data to the drive
        should be called before formatting to initialize an XT-type
          controller's sector buffer
        used for diagnostics only on PS/2 systems
SeeAlso: AH=0Bh
--------B-1310-------------------------------
INT 13 - HARD DISK - CHECK IF DRIVE READY
        AH = 10h
        DL = drive number (80h = first, 81h = second hard disk)
Return: CF set on error
        CF clear if successful
        AH = status (see #00234 at AH=01h)
SeeAlso: AH=11h
--------B-1311-------------------------------
INT 13 - HARD DISK - RECALIBRATE DRIVE
        AH = 11h
        DL = drive number (80h = first, 81h = second hard disk)
Return: CF set on error
        CF clear if successful
        AH = status (see #00234 at AH=01h)
Note:   causes hard disk controller to seek the specified drive to cylinder 0
SeeAlso: AH=00h,AH=0Ch,AH=10h,AH=19h"FIXED DISK",MEM 0040h:003Eh
--------B-1312-------------------------------
INT 13 - HARD DISK - CONTROLLER RAM DIAGNOSTIC (XT,PS)
        AH = 12h
        DL = drive number (80h = first, 81h = second hard disk)
Return: CF set on error
        CF clear if successful
        AH = status code (see #00234 at AH=01h)
        AL = 00h
SeeAlso: AH=13h,AH=14h
--------d-1312-------------------------------
INT 13 - Future Domain SCSI CONTROLLER - STOP SCSI DISK
        AH = 12h
        DL = hard drive ID
Return: CF set on error
        CF clear if successful
        AH = status code (see #00234 at AH=01h)
Notes:  available at least on the TMC-870 8-bit SCSI controller BIOS v6.0A
        if the given drive is a SCSI device, the SCSI Stop Unit command is sent
          and either "Disk prepared for shipping" or "Disk Stop command failed"
          is displayed
        the TMC-950 does not support any Future Domain BIOS calls; instead,
          it provides a full CAM implementation (see INT 4F/AX=8100h)
--------d-1312-------------------------------
INT 13 - SyQuest - START/STOP SCSI DISK
        AH = 12h
        AL = subfunction
            00h start disk
            01h stop disk
        CX = wait flag
            00h wait for ready
            01h don't wait for ready
        DL = hard drive ID (bit 7 for hard disks must be set)
Return: CF set on error
        CF clear if successful
        AH = status
            00h successful
            01h invalid function request
            80h timeout
SeeAlso: AH=12h"Future Domain",AH=13h"SyQuest"
--------B-1313-------------------------------
INT 13 - HARD DISK - DRIVE DIAGNOSTIC (XT,PS)
        AH = 13h
        DL = drive number (80h = first, 81h = second hard disk)
Return: CF set on error
        CF clear if successful
        AH = status code (see #00234 at AH=01h)
        AL = 00h
SeeAlso: AH=12h"HARD DISK",AH=14h"HARD DISK"
--------d-1313-------------------------------
INT 13 - SyQuest - READ DRIVE PARAMATERS (for DOS 5+)
        AH = 13h
        DL = drive ID (bit 7 set for hard disks)
Return: CF set on error
            AH = status (07h) (see #00234 at AH=01h)
        CF clear if successful
            AH = 00h
            BL = drive type (AT/PS2 floppies only) (see #00242)
            CH = low eight bits of maximum cylinder number
            CL = maximum sector number (bits 5-0)
                 high two bits of maximum cylinder number (bits 7-6)
            DH = maximum head number
            DL = number of drives
            ES:DI -> drive parameter table (floppies only)
Notes:  the return values are identical to the standard INT 13/AH=08h, but the
          number of drives is not limited to 2, so
        scanning all possible drive numbers with the Read DASD Type call
          (AH=15h) should generally be preferred to determine the number of
          drives attached to the system.
SeeAlso: AH=08h"PC",AH=12h"SyQuest",AH=15h,AH=59h"SyQuest"
--------B-1314-------------------------------
INT 13 - HARD DISK - CONTROLLER INTERNAL DIAGNOSTIC
        AH = 14h
Return: CF set on error
        CF clear if successful
        AH = status code (see #00234 at AH=01h)
        AL = 00h
SeeAlso: AH=12h,AH=13h
--------B-1315-------------------------------
INT 13 - DISK - GET DISK TYPE (XT 1/10/86 or later,XT286,AT,PS)
        AH = 15h
        DL = drive number (bit 7 set for hard disk)
Return: CF clear if successful
            AH = type code
                00h no such drive
                01h floppy without change-line support
                02h floppy (or other removable drive) with change-line support
                03h hard disk
                    CX:DX = number of 512-byte sectors
        CF set on error
            AH = status (see #00234 at AH=01h)
Note:   SyQuest can report type 01h or 02h for 'hard disks', since its media
          is removable
BUGS:   many versions of the Award 486 BIOS do not return the sector count
          because the BIOS exit code restores CX and DX to their original
          values after the function had already set them to correct values
        several different Compaq BIOSes incorrectly report high-numbered
          drives (such as 90h, B0h, D0h, and F0h) as present, giving them the
          same geometry as drive 80h; as a workaround, scan through disk
          numbers, stopping as soon as the number of valid drives encountered
          equals the value in 0040h:0075h
SeeAlso: AH=08h,AH=16h,AH=17h,AH=19h"SCSI",MEM 0040h:0075h
--------B-1316-------------------------------
INT 13 - FLOPPY DISK - DETECT DISK CHANGE (XT 1/10/86 or later,XT286,AT,PS)
        AH = 16h
        DL = drive number (00h-7Fh)
Return: CF clear if change line inactive
            AH = 00h (disk not changed)
        CF set if change line active
            AH = status
                01h invalid command (SyQuest)
                06h change line active or not supported
                80h drive not ready or not present
Notes:  call AH=15h first to determine whether the drive supports a change
          line
        this call also clears the media-change status, so that a disk change
          is only reported once
BUG:    some versions of Award 386 Modular BIOS and AMI BIOS fail to clear
          the media-change status
SeeAlso: AH=15h,AH=49h
--------B-1317-------------------------------
INT 13 - FLOPPY DISK - SET DISK TYPE FOR FORMAT (AT,PS)
        AH = 17h
        AL = format type
            01h = 320/360K disk in 360K drive
            02h = 320/360K disk in 1.2M drive
            03h = 1.2M disk in 1.2M drive
            04h = 720K disk in 720K or 1.44M drive
        DL = drive number
Return: CF set on error
        CF clear if successful
        AH = status (see #00234 at AH=01h)
Note:   this function does not handle 1.44M drives; use AH=18h instead
SeeAlso: AH=15h,AH=18h
--------d-131700-----------------------------
INT 13 - Future Domain SCSI CONTROLLER - GET INQUIRY INFO FROM SCSI DEVICE
        AX = 1700h
        CL = length of buffer
        DL = hard drive ID
        ES:BX -> buffer for info (see #00243)
Return: CF clear if successful
            CH = number of bytes returned in buffer???
        CF set on error
            AH = status code (see #00234 at AH=01h)
Notes:  this function is not available with 8-bit controller ROM versions < 7.0
        information block bytes 5-n are vendor-specific in older SCSI devices
        the TMC-950 does not support any Future Domain BIOS calls; instead,
          it provides a full CAM implementation (see INT 4F/AX=8100h)
SeeAlso: AH=18h"SCSI",AH=1Bh"SCSI"

Format of Future Domain SCSI inquiry information block:
Offset  Size    Description     (Table 00243)
 00h    BYTE    device type
                bits 0-4: peripheral device type (see #00244)
                bits 5-7: peripheral qualifier (see #00245)
 01h    BYTE    device type modifier
                bits 0-6: device type modifier
                bit 7: removable medium
 02h    BYTE    SCSI version (see #00246)
 03h    BYTE    data format/capabilities (see #00247)
 04h    BYTE    additional data length (total remaining bytes)
 05h  2 BYTEs   reserved
 07h    BYTE    device capabilities (see #00248)
 08h  8 BYTEs   vendor identification (space-padded ASCII)
 10h  8 BYTEs   product identification (space-padded ASCII)
 20h  4 BYTEs   product revision level (space-padded ASCII)
 24h 20 BYTEs   vendor specific
 38h 40 BYTEs   reserved
 60h    var     vendor specific parameters

(Table 00244)
Values for Future Domain SCSI peripheral device type:
 00h    direct-access device (e.g., magnetic disk)
 01h    sequential-access device (e.g., magnetic tape)
 02h    printer device
 03h    processor device
 04h    write-once device (e.g., some optical disks)
 05h    CD-ROM device
 06h    scanner device
 07h    optical memory device (e.g., some optical disks)
 08h    medium changer device (e.g., jukeboxes)
 09h    communications device
 0Ah    (defined by ASC IT8)
 0Bh    (defined by ASC IT8)
 0Ch-1Eh reserved
 1Fh    unknown or no device type

(Table 00245)
Values for Future Domain SCSI peripheral qualifier:
 000b   device is currently connected to this logical unit and available
 001b   target is capable of supporting the specified peripheral, but the
          physical device is not currently connected to this logical unit
 010b   reserved
 011b   target can't support a physical device on this logical unit
 1xxb   vendor specific

Bitfields for Future Domain SCSI version:
Bit(s)  Description     (Table 00246)
 0-2    ANSI-approved version
        000 device might or might not comply to ANSI standard
        001 device complies to ANSI SCSI-1
        010 device complies to ANSI SCSI-2
        other reserved
 3-5    ECMA version
 6-7    ISO version

Bitfields for Future Domain SCSI data format/capabilities:
Bit(s)  Description     (Table 00247)
 0-2    response data format
        000 information block is as specified in SCSI-1
        001 information block is as specified in CCS
        010 information block is as specified in SCSI-2
        other reserved
 4-5    reserved
 6      terminate I/O process supported
 7      asynchronous event notification supported

Bitfields for Future Domain SCSI device capabilities:
Bit(s)  Description     (Table 00248)
 0      device responds to RESET with a hard RESET
 1      tagged command queuing supported
 2      reserved
 3      linked commands supported
 4      synchronous data transfer supported
 5      16-transfers supported
 6      32-transfers supported
 7      relative addressing supported
--------B-1318-------------------------------
INT 13 - DISK - SET MEDIA TYPE FOR FORMAT (AT model 3x9,XT2,XT286,PS)
        AH = 18h
        DL = drive number
        CH = lower 8 bits of highest cylinder number (number of cylinders - 1)
        CL = sectors per track (bits 0-5)
             top 2 bits of highest cylinder number (bits 6,7)
Return: AH = status
            00h requested combination supported
            01h function not available
            0Ch not supported or drive type unknown
            80h there is no disk in the drive
        ES:DI -> 11-byte parameter table (see #01264 at INT 1E)
Note:   this function does not set the INT 1E vector to point at the returned
          parameter table; it is the caller's responsibility to do so
SeeAlso: AH=05h,AH=07h,AH=17h,INT 1E
--------d-1318-------------------------------
INT 13 - Future Domain SCSI BIOS - GET SCSI CONTROLLER INFORMATION
        AH = 18h
        DL = hard drive ID
Return: CF set on error
            AH = status code (see #00234 at AH=01h)
        CF clear if successful
            AX = 4321h (magic number)
            CX = controller family code (see #00249)
            ---if family code=0200h
                DH = number of exclusively ROM-controlled SCSI devices
                DL = canonical SCSI device number for specified drive
            ---if family code <> 0200h
                BH = number of exclusively ROM-controlled SCSI devices
                BL = canonical SCSI device number for specified drive
Notes:  also sets an internal flag (non-resettable) which prevents some
          controller messages from being displayed, allows writes to
          removable devices (use caution!), and enables the INT 13 interface
          for more than one drive (i.e. DL >= 81h) in at least some ROM
          versions
        the TMC-950 does not support any Future Domain BIOS calls; instead,
          it provides a full CAM implementation (see INT 4F/AX=8100h)
SeeAlso: AH=05h"SCSI",AX=1700h"SCSI",AH=1Bh"SCSI",INT 4F/AX=8100h

(Table 00249)
Values for Future Domain SCSI controller family code:
 0200h  TMC-1680/? (ROM 3.0)
 0203h  TMC-1650/1660/1670/1680 (ROM 2.0)
 040Ah  TMC-820/830/840/850/860/870/875/880/885 (ROM <= 6.0A)
 050Dh  TMC-840/841/880/881 (ROM 5.2D)
 0700h  TMC-830/850/860/875/885 (ROM 7.0)
--------d-1318--CX5055-----------------------
INT 13 - PU_1700.COM - INSTALLATION CHECK
        AH = 18h
        CX = 5055h ('PU')
        DL = 00h
Return: AX = 7570h ('up') if PU_1700 is installed
Program: PU_1700 is a BIOS enhancer from PU Service Systems which permits
          formatting diskettes at higher capacity (1.78M instead of 1.44M)
SeeAlso: AX=057Fh/SI=324Dh"2M"
--------d-1318--CXD2C9-----------------------
INT 13 - XDF.COM - API
        AH = 18h
        CX = D2C9h ("R"+80h, "I"+80h = Roger Ivey)
        DX = 0000h
        BX = function
            0000h installation check
                  Return: AH = 0Ch
                          CX = 7269h ("ri" = Roger Ivey)
                          ES = segment of driver
                          CF set
            2F64h ("/d") disable the driver
                  Return: AH = 0Ch
                          ES:BX = pointer to activation flag (it is set to 0:
                                  set it to 1 to enable the driver again)
                          CX = 7269h
                          CF set
            2F75h ("/u") unload the driver (restore interrupts & free memory)
                  Return: AH = 0Ch
                          DL = 55h ("U") if successful
                             = 00h         if fails
                          CX = 7269h
                          ES = segment of driver
                          CF set
                          AL, BX, DH, and DI destroyed
Program: XDF is a TSR provided with PC-DOS 7.0 to support XDF 1.84M disks,
          developed by Roger D. Ivey
Note:   After disabling or enabling the driver, a disk change must be performed
          or simulated to reset the driver.
--------B-1319-------------------------------
INT 13 - FIXED DISK - PARK HEADS ON ESDI DRIVE (XT286,PS)
        AH = 19h
        DL = drive
Return: CF set on error
        CF clear if successful
        AH = status (see #00234 at AH=01h)
SeeAlso: AH=11h
--------d-1319-------------------------------
INT 13 - Future Domain SCSI CONTROLLER - REINITIALIZE DRIVE
        AH = 19h
        DL = hard drive ID
Return: CF set on error
            AH = status code (see #00234 at AH=01h)
        CF clear if successful
            AH = disk type (03h = fixed disk)
            CX:DX = number of 512-byte sectors
Notes:  sends SCSI Read Capacity command to get number of logical blocks and
          adjusts the result for 512-byte sectors
        displays either "Error in Read Capacity Command" or "nnn Bytes per
          sector" (nnn=256 or 512, the only sizes supported in the translation
          code)
        should probably be called when a removable device has its media changed
        returns the same values as AH=15h
        the TMC-950 does not support any Future Domain BIOS calls; instead,
          it provides a full CAM implementation (see INT 4F/AX=8100h)
SeeAlso: AH=15h,AH=1Ah,INT 4F/AX=8100h
--------d-131A-------------------------------
INT 13 - ESDI FIXED DISK - FORMAT UNIT (PS)
        AH = 1Ah
        AL = defect table entry count
        CL = format modifiers (see #00250)
        DL = drive (80h,81h)
        ES:BX -> defect table (see #00251), ignored if AL=00h
Return: CF set on error
        CF clear if successful
        AH = status (see #00234 at AH=01h)
Note:   if periodic interrupt selected, INT 15/AH=0Fh is called after each
          cylinder is formatted
SeeAlso: AH=07h,INT 15/AH=0Fh

Bitfields for ESDI format modifiers:
Bit(s)  Description     (Table 00250)
 4      generate periodic interrupt
 3      perform surface analysis
 2      update secondary defect map
 1      ignore secondary defect map
 0      ignore primary defect map

Format of defect table entry [array]:
Offset  Size    Description     (Table 00251)
 00h  3 BYTEs   relative sector address (little-endian)
 03h    BYTE    flags and defect count
                bit 7: last logical sector on track
                bit 6: first logical sector on track
                bit 5: last logical sector on cylinder
                bit 4: logical sectors are pushed onto next track
                bits 3-0: number of defects pushed from previous cylinder
--------d-131A-------------------------------
INT 13 - Future Domain SCSI CONTROLLER - GET SCSI PARTIAL MEDIUM CAPACITY
        AH = 1Ah
        CH = track (bits 8,9 in high bits of CL)
        CL = sector (01h to number of sectors/track for drive)
        DH = head
        DL = hard drive ID
Return: CF set on error
        AH = status code (see #00234 at AH=01h)
        CX:DX = logical block number of last quickly-accessible block after
                given block
Notes:  sends SCSI Read Capacity command with the PMI bit set to obtain the
          logical block address of the last block after which a substantial
          delay in data transfer will be encountered (usually the last block
          on the current cylinder).  No translation to 512 byte sectors is
          performed on the result if data is stored on the disk in other than
          512 byte sectors.
        the TMC-950 does not support any Future Domain BIOS calls; instead,
          it provides a full CAM implementation (see INT 4F/AX=8100h)
SeeAlso: AH=15h,AH=19h"SCSI"
--------d-131B-------------------------------
INT 13 - ESDI FIXED DISK - GET MANUFACTURING HEADER
        AH = 1Bh
        AL = number of sectors to read
        DL = drive
        ES:BX -> buffer for manufacturing header (defect list)
Return: CF set on error
        CF clear if successful
        AH = status
Note:   manufacturing header format (Defect Map Record format) can be found
          in IBM 70MB, 115MB Fixed Disk Drives Technical Reference
        the first sector read contains the manufacturing header with the number
          of defect entries and the beginning of the defect map; the remaining
          sectors contain the remainder of the defect map
--------d-131B-------------------------------
INT 13 - Future Domain SCSI CONTROLLER - GET POINTER TO SCSI DISK INFO BLOCK
        AH = 1Bh
        DL = hard drive ID
Return: CF set on error
            AH = status code (see #00234 at AH=01h)
        CF clear if successful
            ES:BX -> SCSI disk information block (see #00252)
Notes:  also sets a non-resettable flag which prevents some controller messages
          from being displayed
        the TMC-950 does not support any Future Domain BIOS calls; instead,
          it provides a full CAM implementation (see INT 4F/AX=8100h)
SeeAlso: AH=18h"SCSI",AH=1Ch"SCSI"

Format of Future Domain SCSI disk information block:
Offset  Size    Description     (Table 00252)
 00h    BYTE    drive physical information (see #00253)
 01h    WORD    translated number of cylinders
 03h    BYTE    translated number of heads
 04h    BYTE    translated number of sectors per track (17, 34, or 63)
 05h    BYTE    drive address
                bits 0-2: logical unit number
                bits 3-5: device number
 06h    BYTE    01h at initialization
 07h    BYTE    sense code byte 00h, or extended sense code byte 0Ch
 08h    BYTE    00h
 09h    BYTE    00h or extended sense code byte 02h (sense key)
 0Ah    BYTE    00h
 0Bh 10 BYTEs   copy of Command Descriptor Block (CDB) (see #03236,#03237)
 15h    DWORD   translated number of sectors on device

Bitfields for Future Domain SCSI device physical information:
Bit(s)  Description     (Table 00253)
 0      ???
 1      device uses parity
 2      256 bytes per sector instead of 512
 3      don't have capacity yet???
 4      disk is removable
 5      logical unit number is not present
--------d-131C-------------------------------
INT 13 - Future Domain SCSI CONTROLLER - GET POINTER TO FREE CONTROLLER RAM
        AH = 1Ch
        DL = hard drive ID (any valid SCSI hard disk)
Return: CF set on error
            AH = status code (see #00234 at AH=01h)
        CF clear if successful
            ES:BX -> first byte of free RAM on controller
Notes:  the Future Domain TMC-870 contains 1024 bytes of RAM at offsets 1800h
          to 1BFFh on-board the controller for storing drive information and
          controller status; ES:BX points to the first byte available for other
          uses
        ES contains the segment at which the controller resides; the
          controller's two memory-mapped I/O ports are at offsets 1C00h, 1E00h
SeeAlso: AH=1Bh"SCSI"
--------d-131C-------------------------------
INT 13 U - ESDI FIXED DISK - ???
        AH = 1Ch
        AL = subfunction (01h-06h)
        DL = drive (80h,81h)
        ???
Return: ???
Note:   these functions perform a controller command 0612h without DMA
SeeAlso: AX=1C08h,PORT 3510h"ESDI"
--------d-131C08-----------------------------
INT 13 U - ESDI FIXED DISK - GET COMMAND COMPLETION STATUS
        AX = 1C08h
        DL = drive (80h,81h)
        ES:BX -> buffer for Command Complete Status Block (see #00254)
Return: CF set on error
        CF clear if successful
        AH = status (see #00234 at AH=01h)
SeeAlso: AX=1C09h,AX=1C0Ah,PORT 3510h"ESDI"

Format of ESDI Command Complete Status Block:
Offset  Size    Description     (Table 00254)
 00h    BYTE    07h
 01h    BYTE    size of block in words (07h)
 02h    BYTE    command error code (see #00255)
 03h    BYTE    command status code (see #00256)
 04h    BYTE    device error code, group 1 (see #00257)
 05h    BYTE    device error flags, group 2 (see #00258)
 06h    WORD    number of unprocessed sectors due to abnormal termination
 08h    DWORD   last Relative Sector Address processed by command
 0Ch    WORD    number of sectors corrected by ECC codes

(Table 00255)
Values for ESDI command error code:
 00h    successful
 01h    parameter invalid
 02h    unknown function
 03h    unsupported command
 04h    command cancelled
 05h    unknown function
 06h    controller diagnostics failed
 07h    formatting failed
 08h    format error in primary map
 09h    format error in secondary map
 0Ah    diagnostic failure during formatting
 0Bh    warning: secondary map too large during formatting
 0Ch    warning: non-zero defect
 0Dh    system checksum error during formatting
 0Eh    warning: incompatible device
 0Fh    warning: push table overflowed
 10h    warning: more than 15 sectors pushed to next cylinder
 11h    internal hardware error
 12h    warning: errors found while verifying sectors
 13h    invalid device
 FFh    device error

(Table 00256)
Values for ESDI command status code:
 01h    successful
 03h    successful after ECC
 05h    successful after retries
 06h    format partially completed
 07h    successful after ECC and retries
 08h    command completed with warning (see #00255)
 09h    abort complete
 0Ah    reset complete
 0Bh    data transfer ready (no status block)
 0Ch    command completed with failure (see #00257,#00258)
 0Dh    DMA error
 0Eh    command block error (see #00255)
 0Fh    bad attention code
SeeAlso: #00257

(Table 00257)
Values for ESDI device error code, group 1:
 00h    successful
 01h    seek fault detected by device
 02h    interface fault
 03h    sector ID not found
 04h    disk not formatted
 05h    unrecoverable ECC error
 06h    ECC error in sector ID
 07h    invalid relative sector address
 08h    timeout
 09h    sector defective
 0Ah    disk changed (removable media)
 0Bh    selection error
 0Ch    write protected (removable media)
 0Dh    write fault
 0Eh    read fault
 0Fh    no index or sector pulse
 10h    device not ready
 11h    seek error detected by adapter
 12h    bad format
 13h    volume overflow
 14h    data address mark not found
 15h    sector ID not found
 16h    missing device configuration data
 17h    first/last relative sector flags missing
 18h    track empty
 81h    timeout while waiting for stop
 82h    timeout while waiting for end of data transfer
 84h    stopped awaiting data transfer during formatting
 85h    timeout while waiting for head switch
 86h    timeout while awaiting DMA completion
SeeAlso: #00256,#00258

Bitfields for ESDI device error flags, group 2:
Bit(s)  Description     (Table 00258)
 7-5    unused
 4      ready
 3      selected
 2      write fault
 1      on track 0
 0      seek/command complete
SeeAlso: #00257
--------d-131C09-----------------------------
INT 13 U - ESDI FIXED DISK - GET DEVICE STATUS
        AX = 1C09h
        DL = drive (80h,81h)
        ES:BX -> buffer for Device Status Block (see #00259)
Return: CF set on error
        CF clear if successful
        AH = status (see #00234 at AH=01h)
SeeAlso: AX=1C08h,AX=1C0Ah,PORT 3510h"ESDI"

Format of ESDI Device Status Block:
Offset  Size    Description     (Table 00259)
 00h    BYTE    08h
 01h    BYTE    number of words in block (09h)
 02h    BYTE    error flags
 03h    BYTE    unused
 04h    BYTE    command error code (see #00255)
 05h    BYTE    command status code (see #00256)
 06h    WORD    ESDI standard status
 08h  5 WORDs   ESDI vendor-specific status codes
--------d-131C0A-----------------------------
INT 13 U - ESDI FIXED DISK - GET DEVICE CONFIGURATION
        AX = 1C0Ah
        DL = drive (80h,81h)
        ES:BX -> buffer for Drive Configuration Status Block (see #00260)
Return: CF set on error
        CF clear if successful
        AH = status (see #00234 at AH=01h)
Note:   device configuration format can be found in IBM ESDI Fixed Disk Drive
          Adapter/A Technical Reference
SeeAlso: AX=1C08h,AX=1C0Bh,AX=1C0Ch

Format of ESDI Drive Configuration Status Block:
Offset  Size    Description     (Table 00260)
 00h    BYTE    09h
 01h    BYTE    number of words in block (06h)
 02h    BYTE    flags
 03h    BYTE    number of spare sectors per cylinder
 04h    DWORD   total number of usable sectors
 08h    WORD    total number of cylinders
 0Ah    BYTE    tracks per cylinder
 0Bh    BYTE    sectors per track
--------d-131C0B-----------------------------
INT 13 U - ESDI FIXED DISK - GET ADAPTER CONFIGURATION
        AX = 1C0Bh
        ES:BX -> buffer for Controller Configuration Status Block (see #00261)
Return: CF set on error
        CF clear if successful
        AH = status (see #00234 at AH=01h)
SeeAlso: AX=1C0Ch

Format of ESDI Controller Configuration Status Block:
Offset  Size    Description     (Table 00261)
 00h    BYTE    E9h
 01h    BYTE    number of words in block (06h)
 02h    WORD    unused (0000h)
 04h    DWORD   controller microcode revision level
 08h  2 WORDs   unused (0000h)
--------d-131C0C-----------------------------
INT 13 U - ESDI FIXED DISK - GET POS INFORMATION
        AX = 1C0Ch
        ES:BX -> buffer for POS Information Status Block (see #00262)
Return: CF set on error
        CF clear if successful
        AH = status (see #00234 at AH=01h)
SeeAlso: AX=1C0Bh

Format of ESDI POS Information Status Block:
Offset  Size    Description     (Table 00262)
 00h    BYTE    EAh
 01h    BYTE    number of words in block (05h)
 02h    WORD    magic value FFDDh
 04h    BYTE    POS register 3
 05h    BYTE    POS register 2
 06h    BYTE    POS register 5 (unused, FFh)
 07h    BYTE    POS register 4 (unused, FFh)
 08h    BYTE    POS register 7 (unused, FFh)
 09h    BYTE    POS register 6 (unused, FFh)
--------d-131C0D-----------------------------
INT 13 U - ESDI FIXED DISK - ???
        AX = 1C0Dh
        DL = drive (80h,81h)
        ???
Return: ???
Note:   invokes controller command 0614h without DMA
SeeAlso: AH=1Ch"ESDI",AX=1C0Fh,PORT 3510h"ESDI"
--------d-131C0E-----------------------------
INT 13 U - ESDI FIXED DISK - TRANSLATE RBA TO ABA
        AX = 1C0Eh
        CH = low 8 bits of cylinder number
        CL = sector number, high two bits of cylinder number in bits 6 and 7
        DH = head number
        DL = drive number (80h,81h)
        ES:BX -> ABA number
Return: CF set on error
        CF clear if successful
        AH = status (see #00234 at AH=01h)
Note:   ABA (absolute block address) format can be found in IBM ESDI Adapter
          Technical Reference by using its Device Configuration Status Block
SeeAlso: AX=1C08h,AX=1C0Fh,PORT 3510h"ESDI"
--------d-131C0F-----------------------------
INT 13 U - ESDI FIXED DISK - ???
        AX = 1C0Fh
        DL = drive (80h,81h)
        ???
Return: ???
Note:   invokes controller command 0614h without DMA
SeeAlso: AH=1Ch"ESDI",AX=1C0Dh,AX=1C12h,PORT 3510h"ESDI"
--------d-131C12-----------------------------
INT 13 U - ESDI FIXED DISK - ???
        AX = 1C12h
        DL = drive (80h,81h)
        ???
Return: ???
Note:   invokes controller command 0612h without DMA
SeeAlso: AH=1Ch"ESDI",AX=1C0Fh,PORT 3510h"ESDI"
--------c-131D-------------------------------
INT 13 - IBMCACHE.SYS - CACHE STATUS
        AH = 1Dh
        AL = subfunction
            01h get status record
                DL = drive???
                Return: ES:BX -> status record (see #00263)
                        CF set on error
                            AH = error code
            02h set cache status
                ES:BX -> status record (see #00263)
                DL = drive???
                Return: CF set on error

Format of IBMCACHE.SYS status record:
Offset  Size    Description     (Table 00263)
 00h    DWORD   total number of read requests
 04h    DWORD   total number of hits
 08h    DWORD   number of physical disk reads
 0Ch    DWORD   total number of sectors requested by physical disk reads
 10h  6 BYTEs   ???
 16h    DWORD   pointer to start of error list (see #00264)
 1Ah    DWORD   pointer to end of error list
 1Eh    WORD    ???
 20h    BYTE    using extended memory if nonzero
 21h    BYTE    ???
 22h  4 BYTEs   ASCII version number
 26h    WORD    cache size in KB
 28h    WORD    sectors per page

Format of IBMCACHE.SYS error list:
Offset  Size    Description     (Table 00264)
 00h    DWORD   relative block address of bad page
 04h    BYTE    drive
 05h    BYTE    sector bit-map
 06h    WORD    next error
--------d-131F-------------------------------
INT 13 - SyQuest - DOOR LATCH/DOOR BUTTON DETECT
        AH = 1Fh
        AL = subfunction
            00h allow media removal
            01h prevent media removal (lock door)
        DL = drive ID (bit 7 set for hard disks)
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = error code
                00h successful
                01h invalid function request
                80h timeout
                DDh media change requested
SeeAlso: AH=12h"SyQuest",AH=13h"SyQuest",AH=59h"SyQuest"
--------d-1320-------------------------------
INT 13 - DISK - ??? (Western Digital "Super BIOS")
        AH = 20h
        ???
Return: ???
Notes:  returns some kind of status related to whether the drive contains its
          default media type
        QEMM v6.00 calls INT 13/AX=2000h/DL=81h in some cases
--------b-1320-------------------------------
INT 13 U - Compaq, ATAPI Removable Media Device - GET CURRENT MEDIA FORMAT
        AH = 20h
        DL = drive number (00h,01h)
Return: CF clear if successful
            AL = media type (see #00265)
            AH = 00h
        CF set on error
            AH = error code
                01h invalid request
                30h drive does not support media sense
                31h no such drive / media not present
                32h non-default media / drive does not supporte media type
Notes:  this function is supported by the 3/8/93 ROM BIOS, but only partially
          (AL is always 00h when successful) by the 8/3/93 version
        this function is also supported by some recent versions of the Phoenix
          486 BIOS

(Table 00265)
Values for Compaq/ATAPI diskette media type:
 03h    720K  (1M unformatted)
 04h    1.44M (2M unformatted)
 06h    2.88M (4M unformatted)
 0Ch    360K
 0Dh    1.2M
 0Eh    Toshiba 3mode
 0Fh    NEC 3mode (1024-byte sectors)
 10h    ATAPI Removable Media Device
--------c-1320-------------------------------
INT 13 u - QUICKCACHE II v4.20 - DISMOUNT
        AH = 20h
        AL = drive (00h = A:, etc. or 7Fh for all removable drives???
                                   or FFh for all drives)
Return: AX = status (0000h successful)
Program: QUICKCACHE II is a shareware disk cache by P.R. Glassel and
          Associates, Inc.
Desc:   flush any dirty buffers for the specified drive(s) and then discard
          those sector buffers
SeeAlso: AH=21h"QUICKCACHE",AH=22h"QUICKCACHE",AH=28h
--------d-1321-------------------------------
INT 13 - HARD DISK - PS/1 and newer PS/2 - READ MULTIPLE DISK SECTORS
        AH = 21h
        AL = number of sectors to write
        CH = low byte of 12-bit cylinder number
        CL = starting sector (bits 0-5) and bits 8-9 of cylinder (bits 6-7)
        DH = head number (bits 0-5) and bits 10-11 of cylinder (bits 6-7)
        DL = drive number (80h,81h)
        ES:BX -> buffer for data to be read
Return: CF clear if successful
            ES:BX buffer filled
        CF set on error
        AH = status (see #00234 at AH=01h)
Desc:   read from the disk using the Multiple Block mode available on newer
          IDE drives and some hard disk controllers, which generates an
          interrupt only after the end of transferring a group of sectors
          rather than after each sector
Notes:  must call AH=24h"PS/1" before using this function
        input values in CL and DH are not range-checked
        the byte at address 0040h:0074h is set to the status of the operation
SeeAlso: AH=02h,AH=22h"PS/1",AH=23h"PS/1",AH=24h"PS/1"
--------c-1321-------------------------------
INT 13 u - QUICKCACHE II v4.20 - FLUSH CACHE
        AH = 21h
Return: AX = status (0000h successful)
Desc:   immediately write all dirty sectors back to disk
SeeAlso: AH=25h"QUICKCACHE",AH=2Eh,AH=2Fh
--------d-1322-------------------------------
INT 13 - HARD DISK - PS/1 and newer PS/2 - WRITE MULTIPLE DISK SECTORS
        AH = 22h
        AL = number of sectors to write
        CH = low byte of 12-bit cylinder number
        CL = starting sector (bits 0-5) and bits 8-9 of cylinder (bits 6-7)
        DH = head number (bits 0-5) and bits 10-11 of cylinder (bits 6-7)
        DL = drive number (80h,81h)
        ES:BX -> buffer containing data to be written
Return: CF clear if successful
        CF set on error
        AH = status (see #00234 at AH=01h)
Desc:   write to the disk using the Multiple Block mode available on newer
          IDE drives and some hard disk controllers, which generates an
          interrupt only after the end of transferring a group of sectors
          rather than after each sector
Notes:  must call AH=24h"PS/1" before using this function
        input values in CL and DH are not range-checked
        the byte at address 0040h:0074h is set to the status of the operation
SeeAlso: AH=03h,AH=21h"PS/1",AH=23h"PS/1",AH=24h"PS/1"
--------c-1322-------------------------------
INT 13 u - QUICKCACHE II v4.20 - ENABLE/DISABLE CACHE
        AH = 22h
        AL = new state (00h disabled, 01h enabled)
Return: AX = status (0000h successful)
Note:   enables/disables caching of all drives
SeeAlso: AH=2Ch,AH=2Dh,AH=32h,AH=33h,AH=A3h,AH=A4h
--------d-1323-------------------------------
INT 13 U - HARD DISK - PS/1 and newer PS/2 - SET CONTROLLER FEATURES REGISTER
        AH = 23h
        AL = feature number (see #00266)
        DL = drive number (80h,81h)
        ???
Return: CF clear if successful
        CF set on error
        AH = status (see #00234 at AH=01h)
SeeAlso: AH=21h"PS/1",AH=22h"PS/1",AH=24h"PS/1",AH=25h"PS/1"

(Table 00266)
Values for PS/1 hard disk feature number:
 01h    select 8-bit data transfers instead of 16-bit
 02h    enable write cache
 22h    Write Same, user-specified area
 33h    disable retries
 44h    set number of ECC bytes for read long/write long (see AH=0Ah,AH=0Bh)
 54h    set cache segments
 55h    disable lookahead
 66h    disable reverting to power-on defaults
 77h    disable error correctioni
 81h    select 16-bit data transfers (default)
 82h    disable write cache
 88h    enable error correction (default)
 99h    enable retries (default)
 AAh    enable lookahead
 BBh    set ECC length for read long/write long to four bytes
 CCh    enable reverting to power-on defaults
 DDh    Write Same, entire disk
SeeAlso: #P0535
--------c-1323-------------------------------
INT 13 U - QUICKCACHE II v4.20 - GET ??? ADDRESS
        AH = 23h
Return: AX = status (0000h successful)
        ES = segment of ??? data
--------d-1324-------------------------------
INT 13 - HARD DISK - PS/1 and newer PS/2 - SET MULTIPLE MODE
        AH = 24h
        AL = number of sectors per block (2,4,8,16)
        DL = drive number (80h,81h)
Return: CF clear if successful
        CF set onerror
        AH = status (see #00234 at AH=01h)
Desc:   specify how many sectors the controller should transfer as a group
          between operation-complete interrupts when using the Read Multiple
          and Write Multiple functions (AH=21h,AH=22h)
Notes:  set the number of sectors to 0 to disable multiple-transfer mode
        the maximum value for the block size depends on the fixed disk
          drive type.  The value is stored in byte 15h of the fixed disk
          drive parameter table that is created by POST.
        the byte at address 0040h:0074h is set to status of operation.
SeeAlso: AH=21h"PS/1",AH=22h"PS/1",AH=23h"PS/1",AH=25h"PS/1"
--------c-1324-------------------------------
INT 13 u - QUICKCACHE II v4.20 - SET SECTORS
        AH = 24h
        BX = new number of sector buffers in cache
Return: AX = status
            0000h successful
            0001h failed--size adjusted
            8000h cache cannot be resized while enabled
SeeAlso: AH=36h
--------d-1325-------------------------------
INT 13 - HARD DISK - PS/1 and newer PS/2 - IDENTIFY DRIVE
        AH = 25h
        DL = drive number (80h,81h)
        ES:BX-> 512 byte buffer for reply packet
Return: CF clear if successful
        CF set on error
        AH = status (see #00234 at AH=01h)
        buffer filled with ATA/IDE-style drive information block (see #00267)
Desc:   retrieves the 256 words of drive data stored on an IDE hard disk
Notes:  the byte at address 0040h:0074h is set to the status of the operation
        IBM officially classifies this function as optional
SeeAlso: AH=23h"PS/1"

Format of drive information block:
Offset  Size    Description     (Table 00267)
 00h    WORD    general drive configuration (see #00268)
 02h    WORD    number of cylinders
 04h    WORD    reserved
 06h    WORD    number of heads
 08h    WORD    number of unformatted bytes per track
 0Ah    WORD    number of unformatted bytes per sector
 0Ch    WORD    number of sectors per track
 0Eh  6 BYTEs   vendor unique
 14h 20 BYTEs   serial number in ASCII, 0000h=not specified)
 28h    WORD    buffer type
 2Ah    WORD    buffer size in 512 byte increments (0000h=not specified)
 2Ch    WORD    number of ECC bytes passed on Read/Write Long cmds
                0000h = not specified
 2Eh  8 BYTEs   firmware revision in ASCII, 0000h=not specified
 36h 40 BYTEs   model number in ASCII, 0000h=not specified
 5Eh    WORD    bits 15-8  Vendor Unique
                bits 7-0  00h = Read/Write Multiple commands not implemented
                          xxh = Maximum number of sectors that can be
                          transferred per interrupt on Read and Write
                          Multiple commands
 60h    WORD    0000h = cannot perform doubleword I/O
                0001h = can perform doubleword I/O
 62h    WORD    capabilities
                bit 15-9  0=reserved
                bit 8  1=DMA Supported
                bit 7-0  Vendor Unique
 64h    WORD    reserved
 66h    WORD    bits 15-8 PIO data transfer cycle timing mode
                bits 7-0  Vendor Unique
 68h    WORD    bits 15-8 DMA data transfer cycle timing mode
                bits 7-0  Vendor Unique
 6Ah    WORD    bits 15-1 reserved
                bit 0   1=the fields reported in tranlation mode are valid
                        0=the fields reported in translation mode may be valid
 6Ch    WORD    number of current cylinders
 6Eh    WORD    number of current heads
 70h    WORD    number of current sectors per track
 72h    DWORD   current capacity in sectors
 76h    WORD    reserved
 78h 136 BYTEs  not defined by ATA spec 2.6
100h 64 BYTEs   vendor unique
140h 96 BYTEs   reserved
Note:   the above description is as in the ATA (AT Attachment) Specification.
SeeAlso: #P0516

Bitfields for general drive configuration:
Bit(s)  Description     (Table 00268)
 15     0   reserved for non-magnetic drives
 14     format speed tolerance gap required
 13     track offset option available
 12     data strobe offset option available
 11     rotational speed tolerance is > 0.5%
 10     disk transfer rate > 10 Mbs
 9      disk transfer rate > 5Mbs but <= 10Mbs
 8      disk transfer rate <= 5Mbs
 7      removable cartridge drive
 6      fixed drive
 5      spindle motor control option implemented
 4      head switch time > 15 usec
 3      not MFM encoded
 2      soft sectored
 1      hard sectored
 0      reserved (0)
--------c-1325-------------------------------
INT 13 u - QUICKCACHE II v4.20 - SET FLUSH INTERVAL
        AH = 25h
        BX = interval
Return: AX = status (0000h successful)
Desc:   specify how often the cache should write dirty buffers to disk when
          buffered writes are enabled
SeeAlso: AH=21h"QUICKCACHE",AH=2Ch,AH=2Eh
--------c-1326-------------------------------
INT 13 U - QUICKCACHE II v4.20 - UNINSTALL
        AH = 26h
Return: AX = status
            0000h successful
            0001h-00FFh interrupt vector which was hooked by another TSR
SeeAlso: AH=27h
--------c-1327--BX0000-----------------------
INT 13 u - QUICKCACHE II v4.20 - INSTALLATION CHECK
        AH = 27h
        BX = 0000h
Return: AX = 0000h if installed
        BX nonzero if installed
            BH = major version
            BL = binary minor version
Program: QUICKCACHE II is a shareware disk cache by P.R. Glassel and
          Associates, Inc.
SeeAlso: AH=26h,AH=A0h,INT 16/AX=FFA5h/CX=1111h
--------c-1328-------------------------------
INT 13 U - QUICKCACHE II v4.20 - SET AUTOMATIC DISMOUNT
        AH = 28h
        AL = new state (00h disabled, 01h enabled)
Return: AX = status (0000h successful)
SeeAlso: AH=20h"QUICKCACHE"
--------c-1329-------------------------------
INT 13 U - QUICKCACHE II v4.20 - NOP
        AH = 29h
Return: AX = 0000h
--------c-132A-------------------------------
INT 13 u - QUICKCACHE II v4.20 - SET BUFFER SIZE
        AH = 2Ah
        AL = buffer size (1-30)
Return: AX = status (0000h successful)
Desc:   specify the number of cache sector buffers to dedicate to buffered read
          and write operations
SeeAlso: AH=2Ch,AH=2Dh,AH=39h,AH=3Ah
--------c-132B-------------------------------
INT 13 U - QUICKCACHE II v4.20 - DRIVE ACCESS SOUNDS
        AH = 2Bh
        AL = new state (00h disabled, 01h enabled)
Return: AX = status (0000h successful)
--------c-132C-------------------------------
INT 13 u - QUICKCACHE II v4.20 - SET BUFFERED WRITES
        AH = 2Ch
        AL = new state (00h disabled, 01h enabled)
Return: AX = status (0000h successful)
Desc:   specify whether the cache should delay disk writes
Note:   this function enables or disables delayed writes for all drives; use
          AH=38h to change a single drive
SeeAlso: AH=25h"QUICKCACHE",AH=2Dh,AH=2Eh,AH=38h
--------c-132D-------------------------------
INT 13 u - QUICKCACHE II v4.20 - SET BUFFERED READ
        AH = 2Dh
        AL = new state (00h disabled, 01h enabled)
Return: AX = status (0000h successful)
Desc:   specify whether the cache should attempt to read ahead of actual
          requests
Note:   this function enables or disables read-ahead for all drives; use AH=37h
          to change a single drive
SeeAlso: AH=2Ch,AH=37h
--------c-132E-------------------------------
INT 13 u - QUICKCACHE II v4.20 - SET FLUSH COUNT
        AH = 2Eh
        BX = flush count
Return: AX = status (0000h successful)
Desc:   specify how many dirty sectors the cache should write after each flush
          interval (see AH=25h"QUICKCACHE") when buffered writes are enabled
SeeAlso: AH=21h"QUICKCACHE",AH=25h"QUICKCACHE",AH=2Ch
--------c-132F-------------------------------
INT 13 - QUICKCACHE II v4.20 - FORCE IMMEDIATE INCREMENTAL FLUSH
        AH = 2Fh
Return: AX = status (0000h successful)
Desc:   immediately flush up to "flushcount" dirty sectors to disk as if the
          flush interval had expired
SeeAlso: AH=21h"QUICKCACHE"
--------c-1330-------------------------------
INT 13 u - QUICKCACHE II v4.20 - GET INFO
        AH = 30h
        AL = what to get
            00h system info (see #00269)
            01h drive info (see #00270)
            02h access frequency (array of 30 words)
            03h drive index
                (array of 32 bytes indicating BIOS drive for DOS drive)
        DS:DX -> buffer for info
Return: AX = status (0000h successful, 8000h invalid info specifier)
Program: QUICKCACHE II is a shareware disk cache by P.R. Glassel and
          Associates, Inc.

Format of QUICKCACHE II system info:
Offset  Size    Description     (Table 00269)
 00h    BYTE    flag: cache enabled
 01h    BYTE    flag: buffered writes enabled
 02h    BYTE    flag: buffered reads enabled
 03h    BYTE    flag: sounds enabled
 04h    BYTE    flag: autodismount enabled
 05h    BYTE    ???
 06h    BYTE    flag: ???
 07h    BYTE    flag: ???
 08h    BYTE    flag: "em_assigned"
 09h    BYTE    flag: emulated EMS
 0Ah    BYTE    single sector bonus
 0Bh    BYTE    "sticky_max"
 0Ch    BYTE    write sector bonus
 0Dh    BYTE    bonus threshold
 0Eh    WORD    flush interval
 10h    WORD    flush count
 12h    WORD    reserve pool size
 14h    WORD    remaining space in reserve pool
 16h    WORD    required free memory
 18h    WORD    total cache sectors
 1Ah    WORD    dirty cache sectors
 1Ch    BYTE    trace buffer size
 1Dh    BYTE    reserved (padding)
SeeAlso: #00270

Format of QUICKCACHE II drive info [16-element array, one element]:
Offset  Size    Description     (Table 00270)
 00h    BYTE    DOS drive number
 01h    BYTE    BIOS drive number
 02h    BYTE    maximum sector number
 03h    BYTE    maximum head number
 04h    BYTE    read buffer size
 05h    BYTE    write buffer size
 06h    BYTE    last status
 07h    BYTE    flag: enabled
 08h    BYTE    flag: buffered write enabled
 09h    BYTE    flag: buffered read enabled
 0Ah    BYTE    flag: in use (drive info is valid)
 0Bh    BYTE    flag: cylinder flush
 0Ch    BYTE    reserved (padding)
 0Dh    BYTE    sectors per track
 0Eh    WORD    sector size
 10h    WORD    sectors assigned
 12h    WORD    dirty sectors
 14h    WORD    reserved sectors
 16h    WORD    number of read errors
 18h    WORD    number of write errors
 1Ah    DWORD   "rio_count"
 1Eh    DWORD   number of cache misses
 22h    DWORD   "wio_count"
 26h    DWORD   "dio_count"
SeeAlso: #00269
--------c-1331-------------------------------
INT 13 U - QUICKCACHE II v4.20 - RESERVE MEMORY
        AH = 31h
        BX = number of paragraphs of conventional memory to reserve for apps
Return: AX = status (0000h successful)
--------c-1332-------------------------------
INT 13 U - QUICKCACHE II v4.20 - ENABLE CACHING FOR SPECIFIC DRIVE
        AH = 32h
        AL = drive number (00h=A:)
Return: AX = status (0000h successful)
SeeAlso: AH=22h"QUICKCACHE",AH=33h
--------c-1333-------------------------------
INT 13 U - QUICKCACHE II v4.20 - DISABLE CACHING FOR SPECIFIC DRIVE
        AH = 33h
        AL = drive number (00h=A:)
Return: AX = status (0000h successful)
SeeAlso: AH=22h"QUICKCACHE",AH=32h
--------c-1334-------------------------------
INT 13 U - QUICKCACHE II v4.20 - SECTOR LOCKING
        AH = 34h
        AL = function
            00h end sector locking/unlocking
            01h lock all accessed sectors into cache
            02h unlock all accessed sectors and discard from cache
Return: AX = status (0000h successful)
SeeAlso: AH=20h"QUICKCACHE",AH=35h
--------c-1335-------------------------------
INT 13 U - QUICKCACHE II v4.20 - SET LOCK POOL SIZE
        AH = 35h
        BX = number of sectors in lock pool
Return: AX = status (0000h successful)
Desc:   specify the number of cache sector buffers which may be dedicated to
          data locked into the cache
SeeAlso: AH=34h
--------c-1336-------------------------------
INT 13 U - QUICKCACHE II v4.20 - SET TRACE BUFFER SIZE
        AH = 36h
        AL = new size of trace buffer
Return: AX = status (0000h successful)
Note:   called with AL=05h during an INT 13/AH=24h"QUICKCACHE" call
SeeAlso: AH=24h"QUICKCACHE"
--------c-1337-------------------------------
INT 13 U - QUICKCACHE II v4.20 - SET BUFFERED READS FOR SPECIFIC DRIVE
        AH = 37h
        AL = new state (00h disabled, else enabled)
        DL = drive number (00h = A:)
Return: AX = status (0000h successful)
SeeAlso: AH=2Dh,AH=38h
--------c-1338-------------------------------
INT 13 U - QUICKCACHE II v4.20 - SET BUFFERED WRITES FOR SPECIFIC DRIVE
        AH = 38h
        AL = new state (00h disabled, else enabled)
        DL = drive number (00h = A:)
Return: AX = status (0000h successful)
SeeAlso: AH=2Ch,AH=37h
--------c-1339-------------------------------
INT 13 U - QUICKCACHE II v4.20 - SET READ BUFFER SIZE FOR SPECIFIC DRIVE
        AH = 39h
        AL = new size of read buffer
        DL = drive number (00h = A:)
Return: AX = status (0000h successful)
Program: QUICKCACHE II is a shareware disk cache by P.R. Glassel and
          Associates, Inc.
SeeAlso: AH=2Ah,AH=3Ah
--------c-133A-------------------------------
INT 13 U - QUICKCACHE II v4.20 - SET WRITE BUFFER SIZE FOR SPECIFIC DRIVE
        AH = 3Ah
        AL = new size of write buffer
        DL = drive number (00h = A:)
Return: AX = status (0000h successful)
SeeAlso: AH=2Ah,AH=39h
--------c-133B-------------------------------
INT 13 U - QUICKCACHE II v4.20 - ENABLE/DISABLE ???
        AH = 3Bh
        AL = new state of ??? (01h enabled, else disabled)
Return: AX = status (0000h successful)
Note:   is affected by the flag reported at offset 05h of the system info
          returned by AH=30h, and sets the flag at offset 06h
SeeAlso: AH=3Ch
--------c-133C-------------------------------
INT 13 U - QUICKCACHE II v4.20 - ENABLE/DISABLE ???
        AH = 3Ch
        AL = new state of ??? (01h enabled, else disabled)
Return: AX = status (0000h successful)
Note:   is affected by the flag reported at offset 05h of the system info
          returned by AH=30h, and sets the flag at offset 07h
SeeAlso: AH=3Bh
--------c-133D-------------------------------
INT 13 U - QUICKCACHE II v4.20 - ENABLE/DISABLE CYLINDER FLUSH FOR DRIVE
        AH = 3Dh
        AL = new state (01h enabled, else disabled)
        DL = drive number (00h = A:)
Return: AX = status (0000h successful)
--------c-133E-------------------------------
INT 13 U - QUICKCACHE II v4.20 - SET SINGLE-SECTOR BONUS
        AH = 3Eh
        AL = new value for bonus
Return: AX = status (0000h successful)
Desc:   specify the bonus score to give to single-sector transfers in order to
          keep those sectors in the cache longer
--------c-133F-------------------------------
INT 13 U - QUICKCACHE II v4.20 - SET BONUS THRESHOLD
        AH = 3Fh
        AL = new value for bonus threshold
Return: AX = status (0000h successful)
--------c-1340-------------------------------
INT 13 U - QUICKCACHE II v4.20 - SET "sticky_max"
        AH = 40h
        AL = new value for "sticky_max"
Return: AX = status (0000h successful)
SeeAlso: AH=41h"QUICKCACHE"
--------d-1341--BX55AA-----------------------
INT 13 - IBM/MS INT 13 Extensions - INSTALLATION CHECK
        AH = 41h
        BX = 55AAh
        DL = drive (80h-FFh)
Return: CF set on error (extensions not supported)
            AH = 01h (invalid function)
        CF clear if successful
            BX = AA55h if installed
            AH = major version of extensions
                01h = 1.x
                20h = 2.0 / EDD-1.0
                21h = 2.1 / EDD-1.1
                30h = EDD-3.0
            AL = internal use
            CX = API subset support bitmap (see #00271)
            DH = extension version (v2.0+ ??? -- not present in 1.x)
Note:   the Phoenix Enhanced Disk Drive Specification v1.0 uses version 2.0 of
          the INT 13 Extensions API
SeeAlso: AH=42h"INT 13 Ext",AH=48h"INT 13 Ext"

Bitfields for IBM/MS INT 13 Extensions API support bitmap:
Bit(s)  Description     (Table 00271)
 0      extended disk access functions (AH=42h-44h,47h,48h) supported
 1      removable drive controller functions (AH=45h,46h,48h,49h,INT 15/AH=52h)
          supported
 2      enhanced disk drive (EDD) functions (AH=48h,AH=4Eh) supported
        extended drive parameter table is valid (see #00273,#00278)
 3-15   reserved (0)
--------c-1341-------------------------------
INT 13 U - QUICKCACHE II v4.20 - SAVE/RESTORE ???
        AH = 41h
        AL = direction
            01h save to file
            else restore from file
        ES:DI -> 1024-byte buffer for ???
Return: AX = status (0000h successful, 8000h failed)
Program: QUICKCACHE II is a shareware disk cache by P.R. Glassel and
          Associates, Inc.
SeeAlso: AH=40h"QUICKCACHE"
--------d-1342-------------------------------
INT 13 - IBM/MS INT 13 Extensions - EXTENDED READ
        AH = 42h
        DL = drive number
        DS:SI -> disk address packet (see #00272)
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = error code (see #00234)
            disk address packet's block count field set to number of blocks
              successfully transferred
SeeAlso: AH=02h,AH=41h"INT 13 Ext",AH=43h"INT 13 Ext"

Format of disk address packet:
Offset  Size    Description     (Table 00272)
 00h    BYTE    10h (size of packet)
 01h    BYTE    reserved (0)
 02h    WORD    number of blocks to transfer (max 007Fh for Phoenix EDD)
 04h    DWORD   -> transfer buffer
 08h    QWORD   starting absolute block number
                (for non-LBA devices, compute as
                  (Cylinder*NumHeads + SelectedHead) * SectorPerTrack +
                  SelectedSector - 1
--------N-134257DX1234-----------------------
INT 13 U - Beame&Whiteside BWLPD - INSTALLATION CHECK
        AX = 4257h ("BW")
        DX = 1234h
Return: BX = 414Ch if installed
Program: BWLPD is the printer daemon from the BW-NFS package
SeeAlso: INT 62/AH=00h"ETHDEV"
--------d-1343-------------------------------
INT 13 - IBM/MS INT 13 Extensions - EXTENDED WRITE
        AH = 43h
        AL = write flags
           ---v1.0,2.0---
           bit 0: verify write
           bits 7-1 reserved (0)
           ---v2.1+ ---
           00h,01h write without verify
           02h write with verify
        DL = drive number
        DS:SI -> disk address packet (see #00272)
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = error code (see #00234)
            disk address packet's block count field set to number of blocks
              successfully transferred
Note:   the BIOS returns CF set/AH=01h (invalid function) if verify is
          requested but not supported
SeeAlso: AH=03h,AH=41h"INT 13 Ext",AH=42h"INT 13 Ext",AH=44h
--------d-1344-------------------------------
INT 13 - IBM/MS INT 13 Extensions - VERIFY SECTORS
        AH = 44h
        DL = drive number
        DS:SI -> disk address packet (see #00272)
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = error code (see #00234)
            disk address packet's block count field set to number of blocks
              successfully verified
SeeAlso: AH=04h,AH=41h"INT 13 Ext",AH=42h"INT 13 Ext",AH=47h
--------d-1345-------------------------------
INT 13 - IBM/MS INT 13 Extensions - LOCK/UNLOCK DRIVE
        AH = 45h
        AL = operation
            00h lock media in drive
            01h unlock media
            02h check lock status
        DL = drive number
Return: CF clear if successful
            AH = 00h
            AL = lock state (00h = unlocked)
        CF set on error
            AH = error code (see #00234)
Notes:  this function is required to be supported for any removable drives
          numbered 80h or higher
        up to 255 locks may be placed on a drive, and the media will not
          be physically unlocked until all locks have been removed
SeeAlso: AH=41h"INT 13 Ext",AH=46h,AH=49h,INT 15/AH=52h"INT 13 Extensions"
--------d-1346-------------------------------
INT 13 - IBM/MS INT 13 Extensions - EJECT MEDIA
        AH = 46h
        AL = 00h (reserved)
        DL = drive number
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = error code (see #00234)
SeeAlso: AH=49h,INT 15/AH=52h"INT 13 Extensions"
--------d-1347-------------------------------
INT 13 - IBM/MS INT 13 Extensions - EXTENDED SEEK
        AH = 47h
        DL = drive number
        DS:SI -> disk address packet (see #00272)
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = error code (see #00234)
SeeAlso: AH=0Ch,AH=42h"INT 13 Ext"
--------d-1348-------------------------------
INT 13 - IBM/MS INT 13 Extensions - GET DRIVE PARAMETERS
        AH = 48h
        DL = drive (80h-FFh)
        DS:SI -> buffer for drive parameters (see #00273)
Return: CF clear if successful
            AH = 00h
            DS:SI buffer filled
        CF set on error
            AH = error code (see #00234)
BUG:    several different Compaq BIOSes incorrectly report high-numbered
          drives (such as 90h, B0h, D0h, and F0h) as present, giving them the
          same geometry as drive 80h; as a workaround, scan through disk
          numbers, stopping as soon as the number of valid drives encountered
          equals the value in 0040h:0075h
SeeAlso: AH=08h,AH=41h,AH=49h,MEM 0040h:0075h

Format of IBM/MS INT 13 Extensions drive parameters:
Offset  Size    Description     (Table 00273)
 00h    WORD    (call) size of buffer
                    (001Ah for v1.x, 001Eh for v2.x, 42h for v3.0)
                (ret) size of returned data
 02h    WORD    information flags (see #00274)
 04h    DWORD   number of physical cylinders on drive
 08h    DWORD   number of physical heads on drive
 0Ch    DWORD   number of physical sectors per track
 10h    QWORD   total number of sectors on drive
 18h    WORD    bytes per sector
---v2.0+ ---
 1Ah    DWORD   -> EDD configuration parameters (see #00278)
                FFFFh:FFFFh if not available
---v3.0 ---
 1Eh    WORD    signature BEDDh to indicate presence of Device Path info
 20h    BYTE    length of Device Path information, including signature and this
                  byte (24h for v3.0)
 21h  3 BYTEs   reserved (0)
 24h  4 BYTEs   ASCIZ name of host bus ("ISA" or "PCI")
 28h  8 BYTEs   ASCIZ name of interface type
                "ATA"
                "ATAPI"
                "SCSI"
                "USB"
                "1394" IEEE 1394 (FireWire)
                "FIBRE" Fibre Channel
 30h  8 BYTEs   Interface Path (see #00275)
 38h  8 BYTEs   Device Path (see #00276)
 40h    BYTE    reserved (0)
 41h    BYTE    checksum of bytes 1Eh-40h (two's complement of sum, which makes
                  the 8-bit sum of bytes 1Eh-41h equal 00h)
Note:   if the size is less than 30 on call, the final DWORD will not be
          returned by a v2.x implementation; similarly for the Device Path info
SeeAlso: #00277,#03196

Bitfields for IBM/MS INT 13 Extensions information flags:
Bit(s)  Description     (Table 00274)
 0      DMA boundary errors handled transparently
 1      cylinder/head/sectors-per-track information is valid
 2      removable drive
 3      write with verify supported
 4      drive has change-line support (required if drive >= 80h is removable)
 5      drive can be locked (required if drive >= 80h is removable)
 6      CHS information set to maximum supported values, not current media
 15-7   reserved (0)
SeeAlso: #00273

Format of EDD v3.0 Interface Path:
Offset  Size    Description     (Table 00275)
---ISA---
 00h    WORD    16-bit base address
 02h  6 BYTEs   reserved (0)
---PCI---
 00h    BYTE    PCI bus number
 01h    BYTE    PCI device number
 02h    BYTE    PCI function number
 03h  5 BYTEs   reserved (0)
SeeAlso: #00273,#00276

Format of EDD v3.0 Device Path:
Offset  Size    Description     (Table 00276)
---ATA---
 00h    BYTE    flag: 00h = master, 01h = slave
 01h  7 BYTEs   reserved (0)
---ATAPI---
 00h    BYTE    flag: 00h = master, 01h = slave
 01h    BYTE    logical unit number
 02h  6 BYTEs   reserved (0)
---SCSI---
 00h    BYTE    logical unit number
 01h  7 BYTEs   reserved (0)
---USB---
 00h    BYTE    to be determined
 01h  7 BYTEs   reserved (0)
---IEEE1394---
 00h    QWORD   64-bit FireWire General Unique Identifier (GUID)
---FibreChannel---
 00h    QWORD   Word Wide Number (WWN)
SeeAlso: #00273,#00275

Format of Phoenix Enhanced Disk Drive Spec translated drive parameter table:
Offset  Size    Description     (Table 00277)
 00h    WORD    number of cylinders
 02h    BYTE    number of heads
 03h    BYTE    A0h (signature indicating translated table)
 04h    BYTE    number of physical sectors per track
 05h    WORD    starting write precompensation cylinder number
 07h    BYTE    reserved
 08h    BYTE    control byte (see #03198 at INT 41"DISK 0")
 09h    WORD    number of physical cylinders
 0Bh    BYTE    number of physical heads
 0Ch    WORD    cylinder number of landing zone
 0Eh    BYTE    number of logical sectors per track
 0Fh    BYTE    checksum
Program: the Phoenix Enhanced Disk Drive Specification is an addition to the
          IBM/MS INT 13 extensions
SeeAlso: #00278,#03196

Format of Phoenix Enhanced Disk Drive Spec Fixed Disk Parameter Table:
Offset  Size    Description     (Table 00278)
 00h    WORD    physical I/O port base address
 02h    WORD    disk-drive control port address
 04h    BYTE    drive flags (see #00279)
 05h    BYTE    proprietary information
                bits 7-4 reserved (0)
                bits 3-0: Phoenix proprietary (used by BIOS)
 06h    BYTE    IRQ for drive (bits 3-0; bits 7-4 reserved and must be 0)
 07h    BYTE    sector count for multi-sector transfers
 08h    BYTE    DMA control
                bits 7-4: DMA type (0-2) as per ATA-2 specification
                bits 3-0: DMA channel
 09h    BYTE    programmed I/O control
                bits 7-4: reserved (0)
                bits 3-0: PIO type (1-4) as per ATA-2 specification
 0Ah    WORD    drive options (see #00280)
 0Ch  2 BYTEs   reserved (0)
 0Eh    BYTE    extension revision level (high nybble=major, low nybble=minor)
                (currently 10h for v1.0 and 11h for v1.1-3.0)
 0Fh    BYTE    2's complement checksum of bytes 00h-0Eh
                8-bit sum of all bytes 00h-0Fh should equal 00h
SeeAlso: #00277

Bitfields for Phoenix Enhanced Disk Drive Spec drive flags:
Bit(s)  Description     (Table 00279)
 7      reserved (1)
 6      LBA enabled
 5      reserved (1)
 4      drive is slave
 3-0    reserved (0)
SeeAlso: #00278,#00280

Bitfields for Phoenix Enhanced Disk Drive Spec drive options:
Bit(s)  Description     (Table 00280)
 0      fast PIO enabled
 1      fast DMA access enabled
 2      block PIO (multi-sector transfers) enabled
 3      CHS translation enabled
 4      LBA translation enabled
 5      removable media
 6      ATAPI device (CD-ROM)
 7      32-bit transfer mode
---v1.1+ ---
 8      ATAPI device uses DRQ to signal readiness for packet command
        (must be 0 if bit 6 is 0)
 10-9   translation type (must be 00 if bit 3 is 0)
        00 Phoenix bit-shifting translation
        01 LBA-assisted translation
        10 reserved
        11 proprietary translation
---v3.0---
 11     Ultra DMA access enabled
 15-12  reserved
SeeAlso: #00278,#00279
--------d-1349-------------------------------
INT 13 - IBM/MS INT 13 Extensions - EXTENDED MEDIA CHANGE
        AH = 49h
        DL = drive number
Return: CF clear if media has not changed
            AH = 00h
        CF set if media may have changed
            AH = 06h (see #00234)
Note:   unlike AH=16h, any drive number may be specified
SeeAlso: AH=16h,AH=41h"INT 13 Ext",AH=46h
--------d-134A-------------------------------
INT 13 - Bootable CD-ROM - INITIATE DISK EMULATION
        AH = 4Ah
        AL = 00h
        DS:SI -> specification packet (see #00281)
Return: CF clear if successful
        CF set on error (drive will not be in emulation mode)
        AX = return codes
SeeAlso: AH=48h,AX=4B00h,AH=4Ch,AH=4Dh

Format of Bootable CD-ROM Specification Packet:
Offset  Size    Description     (Table 00281)
 00h    BYTE    size of packet in bytes (13h)
 01h    BYTE    boot media type (see #00282)
 02h    BYTE    drive number
                00h floppy image
                80h bootable hard disk
                81h-FFh nonbootable or no emulation
 03h    BYTE    CD-ROM controller number
 04h    DWORD   Logical Block Address of disk image to emulate
 08h    WORD    device specification (see also #00282)
                (IDE) bit 0: drive is slave instead of master
                (SCSI)  bits 7-0: LUN and PUN
                        bits 15-8: bus number
 0Ah    WORD    segment of 3K buffer for caching CD-ROM reads
 0Ch    WORD    load segment for initial boot image
                if 0000h, load at segment 07C0h
 0Eh    WORD    number of 512-byte virtual sectors to load
                (only valid for AH=4Ch)
 10h    BYTE    low byte of cylinder count (for INT 13/AH=08h)
 11h    BYTE    sector count, high bits of cylinder count (for INT 13/AH=08h)
 12h    BYTE    head count (for INT 13/AH=08h)
SeeAlso: #00283,AH=08h

Bitfields for Bootable CD-ROM boot media type:
Bit(s)  Description     (Table 00282)
 3-0    media type
        0000 no emulation
        0001 1.2M diskette
        0010 1.44M diskette
        0011 2.88M diskette
        0100 hard disk (drive C:)
        other reserved
 5-4    reserved (0)
 6      image contains ATAPI driver
 7      image contains SCSI driver(s)
SeeAlso: #00281
--------d-134B00-----------------------------
INT 13 - Bootable CD-ROM - TERMINATE DISK EMULATION
        AX = 4B00h
        DL = drive number or 7Fh to terminate all emulations
        DS:SI -> empty specification packet (see #00281)
Return: CF clear if successful
        CF set on error (drive will still be in emulation mode)
        AX = return codes
        DS:SI specification packet filled
SeeAlso: AH=48h,AH=4Ah,AX=4B00h,AH=4Ch,AH=4Dh
--------d-134B01-----------------------------
INT 13 - Bootable CD-ROM - GET STATUS
        AX = 4B01h
        DL = drive number
        DS:SI -> empty specification packet (see #00281)
Return: CF clear if successful
        CF set on error
        AX = return codes
        DS:SI specification packet filled
Note:   same as AX=4B00h, but does not terminate emulation
SeeAlso: AH=48h,AH=4Ah,AX=4B00h,AH=4Ch,AH=4Dh
--------d-134C-------------------------------
INT 13 - Bootable CD-ROM - INITIATE DISK EMULATION AND BOOT
        AH = 4Ch
        AL = 00h
        DS:SI -> specification packet (see #00281)
Return: never, if successful
        CF set (error while attempting to boot)
        AX = error codes
SeeAlso: AH=48h,AH=4Ah,AX=4B00h,AH=4Dh
--------d-134D00-----------------------------
INT 13 - Bootable CD-ROM - RETURN BOOT CATALOG
        AX = 4D00h
        DS:SI -> command packet (see #00283)
Return: CF clear if successful
        CF set on error
        AX = return codes
SeeAlso: AH=48h,AH=4Ah,AX=4B00h,AH=4Ch

Format of Bootable CD-ROM "get boot catalog" command packet:
Offset  Size    Description     (Table 00283)
 00h    BYTE    size of packet in bytes (08h)
 01h    BYTE    number of sectors of boot catalog to read
 02h    DWORD   -> buffer for boot catalog
 06h    WORD    first sector in boot catalog to transfer
SeeAlso: #00281
--------d-134E-------------------------------
INT 13 - IBM/MS INT 13 Extensions v2.1 - SET HARDWARE CONFIGURATION
        AH = 4Eh
        AL = function
            00h enable prefetch
            01h disable prefetch
            02h set maximum PIO transfer mode
            03h set PIO mode 0
            04h set default PIO transfer mode
            05h enable INT 13 DMA maximum mode
            06h disable INT 13 DMA
        DL = drive number
Return: CF clear if successful
            AH = 00h
            AL = status
                00h command was safe (only affected specified drive)
                01h other devices are affected
        CF set on error
            AH = error code (see #00234)
Note:   DMA and PIO modes are mutually exclusive, so selecting DMA disables
          PIO (for either the specified device or all devices on that
          controller), and selecting PIO disables DMA
SeeAlso: AH=41h"INT 13 Extensions",AX=5001h"Enhanced Disk Drive"
--------d-135001-----------------------------
INT 13 - Enhanced Disk Drive Spec v3.0 - SEND PACKET COMMAND
        AX = 5001h
        DL = drive number
        ES:BX -> command packet (see #00284)
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = error code
Desc:   send data to and from a serial packet-oriented device, such as IEEE1394
          and USB
SeeAlso: AH=41h"INT 13 Extensions",AH=4Eh

Format of Enhanced Disk Drive Spec v3.0 command packet:
Offset  Size    Description     (Table 00284)
 00h    WORD    signature B055h
 02h    BYTE    length of packet in bytes
 03h    BYTE    reserved (0)
 04h  N BYTEs   formatted packet data
--------v-135001------------------------
INT 13 - VIRUS - "Andropinis" - INSTALLATION CHECK
        AX = 5001h
Return: AX = 0150h if resident
SeeAlso: AX=FD50h"VIRUS",INT 21/AX=0B56h
--------v-135342CX0001-----------------------
INT 13 - ScanBoot - INSTALLATION CHECK
        AX = 5342h ("SB")
        CX = 0001h
        DX = 0000h
Return: CF clear if ScanBoot installed
           AX = 0000h
           CX = serial number ("SW" if shareware release)
           DX = version
           BX,SI,ES destroyed
Program: ScanBoot is a virus-detection TSR by PanSoft
--------d-135501-----------------------------
INT 13 - Seagate ST01/ST02 - Inquiry
        AX = 5501h
        DH = number of bytes to transfer
        DL = drive ID (80h, 81h, ...)
        ES:BX -> buffer for results
Return: ES:BX buffer filled with the Inquiry results
Notes:  the ST01/ST02 BIOS does not return any success/failure indication,
          so all commands must be assumed to have been successful
        the ST01/ST02 BIOS always maps its drives after the previous BIOS
          drives without changing the BIOS drive count at 0040h:0075h
        this command is identical to the SCSI Inquiry command
--------d-135502-----------------------------
INT 13 - Seagate ST01/ST02 - RESERVED
        AX = 5502h
--------d-135503-----------------------------
INT 13 - Seagate ST01/ST01 - Set Device Type Qualifier (DTQ)
        AX = 5503h
        DH = DTQ byte (see #00285)
        DL = drive ID (80h, 81h, ...)
Return: nothing

Bitfields for DTQ byte:
Bit(s)  Description     (Table 00285)
 7      reserved
 6      SCSI drive attached
 5      reserved
 4      selected drive is ST225N/NP (Paired)
 3      selected drive is ST225N
 2      Host Adapter checks parity on the selected drive
 1      selected drive has been installed
 0      Seagate installation software present
--------d-135504-----------------------------
INT 13 U - Seagate - ??? - RETURN IDENTIFICATION
        AX = 5504h
        DX = drive (bit 7 set for hard disk)
Return: CF clear if successful
            AX = 4321h if ST01/ST02h
            AX = 4322h if ??? Seagate controller
        CF set on error
SeeAlso: AX=5505h,AX=5514h
--------d-135504-----------------------------
INT 13 - Seagate ST01/ST02 - RETURN IDENTIFICATION
        AX = 5504h
        DL = drive ID (80h, 81h, ...)
Return: AX = 4321h
        BL = selected drive number (00h, 01h)
        BH = number of drives attached to Host Adapter (max. 2)
--------d-135505-----------------------------
INT 13 - Seagate - ??? - PARK HEADS
        AX = 5505h
        DX = drive (bit 7 set for hard disk)
Return: CF clear if successful
        CF set on error
SeeAlso: AX=5504h,AX=5515h
--------d-135505-----------------------------
INT 13 - Seagate ST01/ST02 - PARK HEADS
        AX = 5505h
        DL = drive ID (80h, 81h, ...)
        DH = subfunction
            00h park heads (SCSI Stop command)
            01h un-park heads (SCSI Start command)
Return: nothing
--------d-135506-----------------------------
INT 13 - Seagate ST01/ST02 - SCSI Bus Parity
        AX = 5506h
        DL = drive ID (80h, 81h, ...)
        DH = subfunction
            00h disable parity check
            01h enable parity check
            02h return current parity setting
Return: AL = status
            00h parity checking disabled
            01h parity checking enabled
--------d-135507-----------------------------
INT 13 - Seagate ST01/ST02 - RESERVED FUNCTIONS
        AX = 5507h to 550Dh
Note:   officially listed as "reserved"
--------d-135514-----------------------------
INT 13 U - Seagate - ???
        AX = 5514h
        DX = drive (bit 7 set for hard disk)
Return: CF clear if successful
        CF set on error
        AX = return value (FEBEh,FEBFh,FEDAh,FEDBh)
SeeAlso: AX=5504h,AX=5515h
--------d-135515-----------------------------
INT 13 U - Seagate - PARK HEADS???
        AX = 5515h
        DX = drive (bit 7 set for hard disk)
Return: CF clear if successful
        CF set on error
Note:   appears to be identical to AX=5505h
SeeAlso: AX=5504h,AX=5505h
--------d-1359-------------------------------
INT 13 - SyQuest - Generic SCSI pass through
        AH = 59h
        CX = HOST_ID, 0-based
        DX = 80h
        ES:BX pointer to SCSI structure (see #00286)
Return: CF clear
        AH = 95h
SeeAlso: AH=12h"SyQuest",AH=13h"SyQuest",AH=1Fh"SyQuest"

Format of SyQuest SCSI structure:
Offset  Size    Description     (Table 00286)
 00h    WORD    opcode (see #00287)
 02h    BYTE    target's SCSI ID
 03h    BYTE    target's logical unit number
 04h    BYTE    data direction (00h no data xfer, 01h data in, FFh data out)
 05h    BYTE    host status
                00h successful
                01h selection time out
                02h data over-run or under-run
 06h    BYTE    target status at command completion
                00h successful
                02h check status
                08h busy
 07h    BYTE    command data block length
 08h    DWORD   request data length
 0Ch    DWORD   result data length (actual length of data transferred)
 10h    DWORD   -> CDB (see #03236,#03237,#03238)
 14h    DWORD   -> data buffer
Note:   The handler does not perform a 'Request Sense' command if there was an
          error

(Table 00287)
Values for SCSI opcode:
 00h    verify interface
        clears carry flag and returns if function is available
 01h    returns the ID of the INT 13h Handler in a NULL terminated string of
        length less than 40 byte including the terminator.
        The string is stored in the buffer pointed by p_buf.
 02h    device mapping info. The caller provides a one byte buffer.
        The handler stores the Int 13h Device ID (80h or above) in the buffer.
        It stores 0 if that target does not exists.
 03h    execute SCSI command
 04h    device reset
 05h    SCSI bus reset
SeeAlso: #00286
--------d-1370-------------------------------
INT 13 - Priam EDVR.SYS DISK PARTITIONING SOFTWARE???
        AH = 70h
        ???
Return: ???
Note:   Priam's EDISK.EXE (FDISK replacement) and EFMT.EXE (low-level
          formatting program) make this call, presumably to EDVR.SYS (the
          partitioning driver)
SeeAlso: AH=ADh
----------1375-------------------------------
INT 13 - ???
        AH = 75h
        ???
Return: AH = ???
        ???
Note:   intercepted by PC-Cache (v5.1 only)
----------1376-------------------------------
INT 13 - ???
        AH = 76h
        ???
Return: AH = ???
        ???
Note:   intercepted by PC-Cache (v5.1 only)
--------c-137B00-----------------------------
INT 13 - NOW! v3.05 - GET INFORMATION
        AX = 7B00h
        CX:DX -> 1F8h-byte buffer for information record (see #00288)
Return: AX = 0000h
        BX = segment of main resident code
        ES = ???
Program: NOW! is a disk cache by Vertisoft Systems, Inc.
SeeAlso: AX=7B02h,AH=EFh

Format of NOW! information record:
Offset  Size    Description     (Table 00288)
 00h 80 BYTEs   name of directory from which NOW! was started
 50h 424 BYTEs  ???
 81h  ? BYTEs   array of bytes for ???
 F7h 250 BYTEs  array of 25 entries, one per drive???
        Offset  Size    Description
         00h  2 BYTEs   ???
         02h    WORD    ???
         04h    WORD    ???
         06h  4 BYTEs   ???
1F1h  7 BYTEs   ???
--------c-137B01-----------------------------
INT 13 - NOW! v3.05 - ???
        AX = 7B01h
Return: DX = segment of ???
SeeAlso: AX=7B00h
--------c-137B02-----------------------------
INT 13 - NOW! v3.05 - SET INFORMATION
        AX = 7B02h
        BX = segment of ??? (10h above a PSP)
        CX:DX -> 1F8h-byte information record (see #00288)
Return: ???
Program: NOW! is a disk cache by Vertisoft Systems, Inc.
Note:   NOW! grabs the INT 24h value from the PSP reached via the segment in
          BX
SeeAlso: AX=7B00h
--------c-137B03-----------------------------
INT 13 - NOW! v3.05 - ???
        AX = 7B03h
        ???
Return: ???
SeeAlso: AX=7B00h,AX=7B04h
--------c-137B04-----------------------------
INT 13 - NOW! v3.05 - ???
        AX = 7B04h
        ???
Return: ???
SeeAlso: AX=7B03h
--------c-137B05-----------------------------
INT 13 - NOW! v3.05 - GET DISK ACCESSES???
        AX = 7B05h
Return: BX:AX = number of physical accesses???
        DX:CX = total disk accesses???
SeeAlso: AX=7B00h,AX=7B06h
--------c-137B06-----------------------------
INT 13 - NOW! v3.05 - GET ???
        AX = 7B06h
        BX = ???
Return: AX = 0000h
        BX = ???
SeeAlso: AX=7B05h,AX=7B07h
--------c-137B07-----------------------------
INT 13 - NOW! v3.05 - GET ???
        AX = 7B07h
Return: AX = ???
        BX = ???
        CX = ???
        DX = ???
SeeAlso: AX=7B06h
--------c-137B08-----------------------------
INT 13 - NOW! v3.05 - ???
        AX = 7B08h
        CX = ??? (default 00h)
Return: ???
SeeAlso: AX=7B00h
--------c-1380--CX6572-----------------------
INT 13 - FAST! v4.02+ - API
        AH = 80h
        CX = 6572h
        DX = 1970h
        ES:BX -> request packet (see #00290)
        AL = function number (see #00289)
Return: AH = status (except function 06h)
            00h if successful
            01h invalid function
            05h not supported by the installed variant
        CF clear if successful
        CF set on error
        AL may be destroyed
Program: FAST! is a disk cache by Future Computing Systems and marketed by
          BLOC Publishing Corp.
SeeAlso: AX=8001h,AX=8006h,AX=8007h
Index:  hotkeys;FAST!

(Table 00289)
Values for FAST! function:
 01h    get cache information (see AX=8001h)
 04h    disable cache
 05h    enable cache and reset statistics
 06h    installation check (see AX=8006h)
 07h    unhook interrupts (see AX=8007h)
 09h    flush cache
 0Ah    (v4.02+) enable staged writes
 0Bh    (v4.02+) disable staged writes
 0Ch    (v4.02+) enable beep on flush
 0Dh    (v4.02+) disable beep on flush
 0Eh    ???
 0Fh    ???
 10h    (v4.12+) enable hotkeys
 11h    (v4.12+) disable hotkeys
 12h    (v4.13+) set idle delay
 13h    (v4.13+) set flush dirty percentage
 14h    (v5.00+) enable mouse checks
 15h    (v5.00+) disable mouse checks
 16h    (v5.00d+) reduce cache size to minimum
 17h    (v5.00d+) increase cache size to maximum

Format of FAST! request packet:
Offset  Size    Description     (Table 00290)
 00h    DWORD   pointer to 19-byte signature string (see #00291)
 04h    DWORD   pointer to buffer for data (if needed by function)

(Table 00291)
Values for FAST! v4.04-v5.03 signature string:
 13h 07h 06h 08h 11h 18h 0Fh 0Eh 02h 18h 13h 08h 0Bh 08h 01h 00h 04h 08h 15h
--------c-138001CX6572-----------------------
INT 13 - FAST! v4.02+ - GET CACHE INFORMATION
        AX = 8001h
        CX = 6572h
        DX = 1970h
        ES:BX -> request packet (see #00292)
Return: AH = 00h if successful
SeeAlso: AH=80h,AX=8006h

Format of FAST! request packet:
Offset  Size    Description     (Table 00292)
 00h    DWORD   -> 19-byte signature string (see #00291)
 04h    DWORD   -> buffer for cache information (see #00293)

Format of FAST! cache information (v5.00-5.03):
Offset  Size    Description     (Table 00293)
 00h    WORD    binary version number of FAST! (v5.00 = 01F4h)
 02h    BYTE    revision letter (61h = X.XXa, 62h = X.XXb, etc.)
 03h    BYTE    FAST! variant
                (01h = FASTE, 02h = FASTX BIOS, 04h = FASTC, 20h = FASTX XMS)
 04h    DWORD   total number of read requests
 08h    DWORD   number of physical disk reads
 0Ch    DWORD   grabbed hash buckets
 10h    DWORD   "st_386mem"
 14h    DWORD   total number of writes (only counted when staging enabled)
 18h    DWORD   number of physical disk writes (only when staging enabled)
 1Ch    DWORD   number of write errors while flushing cache
 20h    WORD    flags1 (see #00294)
 22h    WORD    flags
                bit 0: ???
                bit 1: staged writes enabled
 24h    WORD    ???
 26h    WORD    maximum cache size in KB
 28h    WORD    minimum cache size in KB
 2Ah    WORD    segment of first cache buffer (FASTC)
                segment of EMS page frame (FASTE)
                XMS handle (FASTX XMS)
 2Ch    WORD    number of hash buckets containing no entries
 2Eh    WORD    number of hash buckets containing one entry
 30h    WORD    number of hash buckets containing two entries
 32h    WORD    number of hash buckets containing three entries
 34h    WORD    number of hash buckets containing four entries
 36h    WORD    number of hash buckets containing five entries
 38h    WORD    maximum contiguous sectors
 3Ah    WORD    hash factor
 3Ch    WORD    number of paragraphs of memory used below 1M
 3Eh    WORD    entries per hash bucket
 40h    WORD    idle delay in seconds
 42h  2 BYTEs   ???
 44h    WORD    staged write threshold percentage
 46h  2 BYTEs   ???
 48h    WORD    number of dirty sectors
 4Ah    WORD    number of staged write buffers
 4Ch    WORD    current cache size in KB
 4Eh    WORD    beep frequency in Hz
 50h    WORD    ???
 52h    WORD    ???

Bitfields for FAST! flags1:
Bit(s)  Description     (Table 00294)
 0      beep on flush
 3      hotkeys enabled
 4      mouse idle check enabled
 8      caching enabled
 13     ???
--------c-138006CX6572-----------------------
INT 13 - FAST! v4.02+ - INSTALLATION CHECK
        AX = 8006h
        CX = 6572h
        DX = 1970h
        ES:BX -> request packet (see #00295)
Return: AX = 1965h if installed
SeeAlso: AH=80h,AX=8001h,AX=8007h

Format of FAST! request packet:
Offset  Size    Description     (Table 00295)
 00h    DWORD   -> 19-byte signature string (see #00291)
--------c-138007CX6572-----------------------
INT 13 - FAST! v4.02+ - UNHOOK INTERRUPTS
        AX = 8007h
        CX = 6572h
        DX = 1970h
        ES:BX -> request packet (see #00296)
Return: AX = 1965h if installed
SeeAlso: AH=80h,AX=8006h
Index:  uninstall;FAST!

Format of FAST! request packet:
Offset  Size    Description     (Table 00296)
 00h    DWORD   -> 19-byte signature string (see #00291)
--------c-1381--SI4358-----------------------
INT 13 - Super PC-Kwik v3.20+ - ???
        AH = 81h
        SI = 4358h
        ???
Return: ???
Note:   PC Tools PC-Cache 5.x and Qualitas Qcache 4.00 are OEM versions of
          Super PC-Kwik, and thus support this call (PC-Cache v5.1 corresponds
          to PC-Kwik v3.20 and PC-Cache v5.5 to PC-Kwik v3.27)
        returns immediately in PC-Cache v5.x
Index:  PC-Cache|Qualitas Qcache
--------c-1382--SI4358-----------------------
INT 13 - Super PC-Kwik v3.20+ - ???
        AH = 82h
        SI = 4358h
        ???
Return: AL = ???
Note:   PC Tools PC-Cache 5.x and Qualitas Qcache 4.00 are OEM versions of
          Super PC-Kwik, and thus support this call
SeeAlso: AH=84h
Index:  PC-Cache|Qualitas Qcache
--------c-1383--SI4358-----------------------
INT 13 - Super PC-Kwik v3.20+ - ???
        AH = 83h
        SI = 4358h
        AL = ???
        ES:BX -> ???
        ???
Return: ???
Note:   PC Tools PC-Cache 5.x and Qualitas Qcache 4.00 are OEM versions of
          Super PC-Kwik, and thus support this call
SeeAlso: AH=85h
Index:  PC-Cache|Qualitas Qcache
--------c-1384--SI4358-----------------------
INT 13 - Super PC-Kwik v3.20+ - ???
        AH = 84h
        SI = 4358h
        AL = ???
        ???
Return: AL = ???
Note:   PC Tools PC-Cache 5.x and Qualitas Qcache 4.00 are OEM versions of
          Super PC-Kwik, and thus support this call
SeeAlso: AH=82h
Index:  PC-Cache|Qualitas Qcache
--------c-1385--SI4358-----------------------
INT 13 - Super PC-Kwik v3.20+ - ???
        AH = 85h
        SI = 4358h
        AL = ???
        DL = ???
        ???
Return: ???
Note:   PC Tools PC-Cache 5.x and Qualitas Qcache 4.00 are OEM versions of
          Super PC-Kwik, and thus support this call (PC-Cache v5.1 corresponds
          to PC-Kwik v3.20)
SeeAlso: AH=83h
Index:  PC-Cache|Qualitas Qcache
--------c-1386--SI4358-----------------------
INT 13 - Super PC-Kwik v4.00+ - ???
        AH = 86h
        SI = 4358h
        ???
Return: ???
Note:   Qualitas Qcache v4.00 is an OEM version of Super PC-Kwik v4.00, and
          thus supports this call
Index:  Qualitas Qcache
--------c-1387--SI4358-----------------------
INT 13 - Super PC-Kwik v4.00+ - ???
        AH = 87h
        SI = 4358h
        ???
Return: AH = status??? (00h)
        CX = ???
        DX = ??? (0000h)
Note:   Qualitas Qcache v4.00 is an OEM version of Super PC-Kwik v4.00, and
          thus supports this call
Index:  Qualitas Qcache
--------c-1388--SI4358-----------------------
INT 13 - Super PC-Kwik v4.00+ - ???
        AH = 88h
        SI = 4358h
        ???
Return: AH = status??? (00h)
        CX = ???
        DX = ??? (0000h)
Note:   Qualitas Qcache v4.00 is an OEM version of Super PC-Kwik v4.00, and
          thus supports this call
Index:  Qualitas Qcache
--------c-1389--SI4358-----------------------
INT 13 - Super PC-Kwik v5.10+ - ???
        AH = 89h
        SI = 4358h
        ???
Return: ???
--------c-138A--SI4358-----------------------
INT 13 - Super PC-Kwik v5.10+ - ???
        AH = 8Ah
        SI = 4358h
        ???
Return: ???
--------c-138EED-----------------------------
INT 13 - HyperDisk v4.01+ - ???
        AX = 8EEDh
        ???
Return: ???
Program: HyperDisk is a shareware disk cache by HyperWare (Roger Cross)
SeeAlso: AX=8EEEh,AX=8EEFh,AH=EEh,INT 2F/AX=DF00h
--------c-138EEE-----------------------------
INT 13 - HyperDisk v4.01+ - ???
        AX = 8EEEh
Return: CF set
        AX = CS of HyperDisk resident code
        ???
Note:   identical to AX=8EEFh in HYPERDKX v4.21-4.30
SeeAlso: AX=8EEDh,AX=8EEFh,AH=EEh
--------c-138EEF-----------------------------
INT 13 - HyperDisk v4.01+ - ???
        AX = 8EEFh
Return: CF set
        AX = CS of HyperDisk resident code
        ???
Note:   identical to AX=8EEEh in HYPERDKX v4.21-4.30
SeeAlso: AX=8EEDh,AX=8EEEh,AH=EEh
--------c-1392--SI4358-----------------------
INT 13 - Super PC-Kwik v5.10+ - ???
        AH = 92h
        SI = 4358h
        ???
Return: AH = status??? (00h)
        DL = ???
SeeAlso: AH=93h
--------c-1393--SI4358-----------------------
INT 13 - Super PC-Kwik v5.10+ - ???
        AH = 93h
        SI = 4358h
        ???
Return: AH = status??? (00h)
        AL = ???
SeeAlso: AH=92h
--------c-1394--SI4358-----------------------
INT 13 - Super PC-Kwik v5.10+ - ???
        AH = 94h
        SI = 4358h
        ???
Return: ???
--------c-1395--SI4358-----------------------
INT 13 - Super PC-Kwik v5.10+ - ???
        AH = 95h
        SI = 4358h
        ???
Return: AH = status??? (00h)
        DX = ???
--------c-1396--SI4358-----------------------
INT 13 - Super PC-Kwik v5.10+ - ???
        AH = 96h
        SI = 4358h
        AL = ??? (01h)
        BX = ??? (0790h)
        DL = ???
Return: AH = status??? (00h)
        DX = ???
--------c-1397--SI4358-----------------------
INT 13 - Super PC-Kwik v5.10+ - ???
        AH = 97h
        SI = 4358h
        ???
Return: ???
--------c-1398--SI4358-----------------------
INT 13 - Super PC-Kwik v5.10+ - ???
        AH = 98h
        SI = 4358h
        ???
Return: ???
--------c-1399--SI4358-----------------------
INT 13 - Super PC-Kwik v5.10+ - ???
        AH = 99h
        SI = 4358h
        ???
Return: ???
--------c-139A--SI4358-----------------------
INT 13 - Super PC-Kwik v5.10+ - ???
        AH = 9Ah
        SI = 4358h
        ???
Return: ???
--------c-139B--SI4358-----------------------
INT 13 - Super PC-Kwik v5.10+ - ???
        AH = 9Bh
        SI = 4358h
        ???
Return: ???
--------c-139C--SI4358-----------------------
INT 13 - Super PC-Kwik v5.10+ - ???
        AH = 9Ch
        SI = 4358h
        ???
Return: ???
Note:   functions 9Ch and 9Dh are the only ones which are fully reentrant; all
          other PC-Kwik API calls (INT 13/81h-B0h) return AX=0200h and CF clear
          if a previous call is still in progress
--------c-139D--SI4358-----------------------
INT 13 - Super PC-Kwik v5.10+ - ???
        AH = 9Dh
        SI = 4358h
        ???
Return: ???
--------c-13A0--SI4358-----------------------
INT 13 - Super PC-Kwik v3.20+ - GET RESIDENT CODE SEGMENT
        AH = A0h
        SI = 4358h
Return: AX = segment of resident code
Note:   PC Tools PC-Cache 5.x and Qualitas Qcache 4.00 are OEM versions of
          Super PC-Kwik, and thus support this call (note that PC-Cache v5.5
          corresponds to PC-Kwik v3.27)
SeeAlso: INT 16/AX=FFA5h/CX=1111h
Index:  PC-Cache|Qualitas Qcache
--------c-13A1--SI4358-----------------------
INT 13 - Super PC-Kwik v3.20+ - FLUSH CACHE
        AH = A1h
        SI = 4358h
Return: CF clear
        AH = 00h (v5.10)
Note:   PC Tools PC-Cache 5.x and Qualitas Qcache 4.00 are OEM versions of
          Super PC-Kwik, and thus support this call (note that PC-Cache v5.1
          corresponds to PC-Kwik v3.20)
SeeAlso: INT 16/AX=FFA5h/CX=FFFFh
Index:  PC-Cache|Qualitas Qcache
--------c-13A2--SI4358-----------------------
INT 13 - Super PC-Kwik v3.20+ - ???
        AH = A2h
        SI = 4358h
        ???
Return: ???
Note:   PC Tools PC-Cache 5.x and Qualitas Qcache 4.00 are OEM versions of
          Super PC-Kwik, and thus support this call (note that PC-Cache v5.1
          corresponds to PC-Kwik v3.20)
Index:  PC-Cache|Qualitas Qcache
--------c-13A3--SI4358-----------------------
INT 13 U - Super PC-Kwik v5.10+ - DISABLE CACHE
        AH = A3h
        SI = 4358h
Return: CF clear
SeeAlso: AH=A4h
--------c-13A4--SI4358-----------------------
INT 13 U - Super PC-Kwik v5.10+ - ENABLE CACHE
        AH = A4h
        SI = 4358h
Return: CF clear
SeeAlso: AH=A3h
--------c-13A5--SI4358-----------------------
INT 13 CU - Super PC-Kwik v5.10+ - PROGRAM TERMINATION NOTIFICATION
        AH = A5h
        SI = 4358h
Return: AX = ???
        SI = ???
Notes:  called and used internally by Super PC-Kwik when a program terminates
          via INT 21/AH=00h, INT 21/AH=31h, or INT 21/AH=4Ch
        this call is not supported by Qualitas Qcache 4.00
Index:  PC-Cache
SeeAlso: AH=A6h,AH=A9h,INT 21/AH=00h,INT 21/AH=31h,INT 21/AH=4Ch
--------c-13A6--SI4358-----------------------
INT 13 CU - Super PC-Kwik v5.10+ - PROGRAM LOAD NOTIFICATION
        AH = A6h
        SI = 4358h
        DS:DX -> ASCIZ program name
        ES:BX -> EXEC data block (see #01590 at INT 21/AH=4Bh)
Return: ???
Note:   called and used internally by Super PC-Kwik when a program is loaded
          with INT 21/AX=4B00h
SeeAlso: AH=A5h,AH=A9h,INT 21/AH=4Bh
--------c-13A7--SI4358-----------------------
INT 13 CU - Super PC-Kwik 5.1 - ???
        AH = A7h
        SI = 4358h
Return: ???
Note:   called and used internally by Super PC-Kwik on some INT 21 calls
SeeAlso: AH=A5h,AH=A6h,AH=A8h
--------v-13A759-----------------------------
INT 13 U - Novell DOS 7 - SDRes v27.03 - ???
        AX = A759h
Return: AX = 59A7h if installed
            DX:BX -> ??? data
Program: SDRes is the resident portion of the Search&Destroy antiviral by
          Fifth Generation Systems, as bundled with Novell DOS 7
SeeAlso: INT 21/AH=0Eh/DL=ADh
--------c-13A8--SI4358-----------------------
INT 13 CU - Super PC-Kwik 5.1 - ???
        AH = A8h
        SI = 4358h
Return: ???
Note:   called and used internally by Super PC-Kwik on some INT 21 calls
SeeAlso: AH=A5h,AH=A6h,AH=A7h
--------c-13A9--SI4358-----------------------
INT 13 CU - Super PC-Kwik 5.1 - EXITCODE RETRIEVAL NOTIFICATION
        AH = A9h
        SI = 4358h
Return: ???
Note:   called and used internally by Super PC-Kwik when an application issues
          INT 21/AH=4Dh
SeeAlso: AH=A5h,AH=A6h,INT 21/AH=4Dh
--------c-13AA--SI4358-----------------------
INT 13 - Super PC-Kwik v4+ - ???
        AH = AAh
        SI = 4358h
        ???
Return: ???
Note:   Qualitas Qcache is an OEM version of Super PC-Kwik, and thus supports
          this call
--------c-13AB--SI4358-----------------------
INT 13 - Super PC-Kwik v4+ - ???
        AH = ABh
        SI = 4358h
        ???
Return: ???
Note:   Qualitas Qcache is an OEM version of Super PC-Kwik, and thus supports
          this call
--------c-13AC--SI4358-----------------------
INT 13 - Super PC-Kwik v4+ - ???
        AH = ACh
        SI = 4358h
        ???
Return: ???
Note:   Qualitas Qcache is an OEM version of Super PC-Kwik, and thus supports
          this call
--------d-13AD-------------------------------
INT 13 - Priam HARD DISK CONTROLLER???
        AH = ADh
        ???
Return: ???
Note:   this call is made from Priam's EFMT.EXE (low-level formatter), probably
          to check the ROM type on the controller for their hard disk kits
SeeAlso: AH=70h
--------c-13AD--SI4358-----------------------
INT 13 - Super PC-Kwik v4+ - ???
        AH = ADh
        SI = 4358h
        ???
Return: ???
Note:   Qualitas Qcache is an OEM version of Super PC-Kwik, and thus supports
          this call
--------c-13AE--SI4358-----------------------
INT 13 - Super PC-Kwik v5.10+ - ???
        AH = AEh
        SI = 4358h
        ???
Return: ???
--------c-13B0--SI4358-----------------------
INT 13 - Super PC-Kwik v3.20+ - ???
        AH = B0h
        SI = 4358h
        ???
Return: ???
Note:   PC Tools PC-Cache 5.x is an OEM version of Super PC-Kwik, and thus
          supports this call; Qualitas Qcache does not support it
Index:  PC-Cache
--------d-13E000-----------------------------
INT 13 - XBIOS - COMMAND
        AX = E000h
        CX = 0
        DL = drive number (80h,81h,82h,83h)
        ES:BX = pointer to XBIOS Command Block (see #00297)
Return: CF clear if successful
            CX = 1234h XBIOS Signature
        CF set on error
Program: XBIOS is a driver in some versions of Disk Manager that is
          loaded from the disk MBR, replacing the ROM BIOS disk support
          e.g. adding LBA mode support, and read/write multiple.
SeeAlso: AH=F9h"SWBIOS"

Format of XBIOS Command Block:
Offset  Size    Description     (Table 00297)
 00h    BYTE    function
                0Eh Get XBIOS Configuration Information
                    Return: buffer points to Ontrackr_Ref_Data structure
                        (see #00298)
 01h    BYTE    reserved (must be zero before function call)
 02h    DWORD   buffer pointer - Input or output depending on opcode
SeeAlso: #00298,#00299

Format of Ontrackr_Ref_Data structure:
Offset  Size    Description     (Table 00298)
 00h    WORD    Size of structure (33h)
 02h    BYTE    VxD Chain mode
 03h 12 BYTEs   Drive 1: Ontrackr_VxD_Data structure (see #00299)
 0Fh 12 BYTEs   Drive 2: Ontrackr_VxD_Data structure
 1Bh 12 BYTEs   Drive 3: Ontrackr_VxD_Data structure
 27h 12 BYTEs   Drive 4: Ontrackr_VxD_Data structure (see #00299)
SeeAlso: #00297,#00299

Format of Ontrackr_VxD_Data structure:
Offset  Size    Description     (Table 00299)
 00h    BYTE    INT13 drive number
 01h    DWORD   Delta skew value
 05h    BYTE    Physical  heads (Word 3 of Identify Data)
 06h    BYTE    Physical sectors per track (Word 6 of Identify Data)
 07h    BYTE    Multiple Block Size (Blocking factor)
 08h    BYTE    Read/Write Multiple disable flags
                00001000b       drive supports r/w multiple
                00000100b       do not use read multiple
                00000010b       do not use write multiple
 09h    WORD    Base port address (1F0/170)
 0Bh    BYTE    Hardware interrupt channel (14/15)
SeeAlso: #00298
--------v-13EC00-----------------------------
INT 13 - VIRUS - "Tiso" - INSTALLATION CHECK
        AX = EC00h
Return: CF clear if installed
SeeAlso: AH=F2h,INT 12/AX=4350h/BX=4920h
--------d-13EE-------------------------------
INT 13 - SWBIOS - SET 1024-CYLINDER FLAG
        AH = EEh
        DL = drive number (80h, 81h)
Return: CF clear
           AH = 00h
Program: SWBIOS is a TSR by Ontrack Computer Systems
Desc:   the following INT 13 call will add 1024 to the specified cylinder
          number to get the actual cylinder number desired
Notes:  the flag is cleared by all INT 13 calls except AH=EEh and AH=EFh
        Disk Manager also supports these calls
        this function is also supported by HyperDisk v4.01+ and PC-Cache v5.5+,
          in order to allow caching of drives using SWBIOS to access more than
          1024 cylinders
        for software which supports that call, this function is equivalent to
          calling AH=EFh with CX=0400h
SeeAlso: AH=F9h,AH=FEh,INT 16/AX=FFA5h/CX=1111h,INT 2F/AX=DF00h
Index:  PC-Cache;huge disks|Disk Manager
--------c-13EF-------------------------------
INT 13 - Ontrack Drive Rocket - SET CYLINDER OFFSET
        AH = EFh
        CX = cylinder offset for next INT 13 call
        DL = drive number (80h, 81h)
Return: CF clear
            AH = 00h
Program: Drive Rocket is a drive accelerator by Ontrack Computer Systems for
          IDE drives supporting the read multiple and write multiple commands
Desc:   the following INT 13 call will add the number given by this call to
          the specified cylinder to get the actual cylinder number, then reset
          the offset to zero
Note:   this function is also supported by the NOW! disk cache, and presumably
          newer versions of SWBIOS and Disk Manager
        for software which supports this call, AH=EEh is equivalent to calling
          this function with CX=0400h
        the cylinder offset is reset to 0 by all INT 13 called except AH=EEh
          and AH=EFh
SeeAlso: AX=7B00h
--------v-13F2-------------------------------
INT 13 - VIRUS - "Neuroquila" - INSTALLATION CHECK
        AH = F2h
Return: CF ??? if installed
SeeAlso: AX=EC00h,INT 12/AX=4350h/BX=4920h,INT 21/AX=0B56h
--------d-13F9-------------------------------
INT 13 - SWBIOS - INSTALLATION CHECK
        AH = F9h
        DL = drive number (80h,81h)
Return: CF clear
            DX = configuration word
                bit 15 set if other SWBIOS extensions available
        CF set on error
Program: SWBIOS is a TSR by Ontrack Computer Systems
        XBIOS is a driver in some versions of Disk Manager that is
          loaded from the disk MBR, replacing the ROM BIOS disk support
          eg adding LBA mode support, and read/write multiple.
Note:   Disk Manager also supports these calls
SeeAlso: AH=EEh,AX=E000h"XBIOS",AH=FFh"EZ-Drive"
Index:  Disk Manager
--------v-13FA--DX5945-----------------------
INT 13 - PC Tools v8+ VSAFE, VWATCH - API
        AH = FAh
        DX = 5945h
        AL = function (00h-07h)
Return: varies by function
        if not installed:
            CF set
                AH = 01h
Note:   this API is identical to the ones on INT 16/AH=FAh and INT 21/AH=FAh,
          so it is listed in its entirety under INT 16/AX=FA00h and following
SeeAlso: INT 16/AX=FA00h
--------v-13FD50------------------------
INT 13 - VIRUS - "Predator" - INSTALLATION CHECK
        AX = FD50h
Return: AX = 50FDh if resident
SeeAlso: AX=5001h"VIRUS",INT 16/AH=DDh"VIRUS"
--------d-13FE-------------------------------
INT 13 - SWBIOS - GET EXTENDED CYLINDER COUNT
        AH = FEh
        DL = drive number (80h, 81h)
Return: CF clear
        DX = number of cylinders beyond 1024 on drive
Program: SWBIOS is a TSR by Ontrack Computer Systems
Notes:  standard INT 13/AH=08h will return a cylinder count truncated to 1024
        BIOS without this extension would return count modulo 1024
        Disk Manager also supports these calls
SeeAlso: AH=EEh
----------13FF-------------------------------
INT 13 - EZ-Drive - INSTALLATION CHECK
        AH = FFh
        DL = drive number (80h)
Return: CF clear
            AX = AA55h
            ES:BX -> string "AERMH13Vxx", where xx is the version number of
                  the EZ-Drive driver
        CF set on error
Program: EZ-Drive is a driver by Micro House that is loaded from the
          hard disk MBR, replacing the ROM BIOS disk support, eg adding
          LBA mode support, and read/write multiple.
Note:   this function is called by the Windows95 Master Boot Record
SeeAlso: AX=E000h"XBIOS",AH=F9h"SWBIOS"
--------B-13FF-------------------------------
INT 13 - IBM SurePath BIOS - Officially "Private" Function
        AH = FFh
--------U-13FFFFBHAA-------------------------
INT 13 - UNIQUE UX Turbo Utility - SET TURBO MODE
        AX = FFFFh
        BH = AAh
        BL = subfunction
            00h installation check
                Return: AX = 1234h if installed
            01h turn on Turbo mode
            02h turn off Turbo mode
            03h set Turbo mode according to hardware switch
            04h set disk access to Turbo mode
            05h set disk access to Normal mode
Return: nothing
SeeAlso: INT 15/AH=DFh
Index:  installation check;UNIQUE UX Turbo Utility
--------S-14---------------------------------
INT 14 - SERIAL - Digiboard DigiCHANNEL PC/X* Extender INT 14 (XAPCM232.SYS)
InstallCheck:   determine whether the "~DOSXAM~" character device exists
Index:  installation check;Digiboard DigiCHANNEL
--------S-1400-------------------------------
INT 14 - SERIAL - INITIALIZE PORT
        AH = 00h
        AL = port parameters (see #00300)
        DX = port number (00h-03h) (04h-43h for Digiboard XAPCM232.SYS)
Return: AH = line status (see #00304)
            FFh if error on Digiboard XAPCM232.SYS
        AL = modem status (see #00305)
Notes:  default handler is at F000h:E739h in IBM PC and 100% compatible BIOSes
        since the PCjr supports a maximum of 4800 bps, attempting to set 9600
          bps will result in 4800 bps
        various network and serial-port drivers support the standard BIOS
          functions with interrupt-driven I/O instead of the BIOS's polled I/O
        the 04/08/93 Compaq system ROM uses only the low two bits of DX
SeeAlso: AH=04h"SERIAL",AH=04h"MultiDOS",AH=05h"SERIAL",AH=57h
SeeAlso: AX=8000h"ARTICOM",AH=81h"COMM-DRV",AH=82h"COURIERS",AH=8Ch
SeeAlso: MEM 0040h:0000h,PORT 03F8h"Serial"

Bitfields for serial port parameters:
Bit(s)  Description     (Table 00300)
 7-5    data rate (110,150,300,600,1200,2400,4800,9600 bps)
 4-3    parity (00 or 10 = none, 01 = odd, 11 = even)
 2      stop bits (set = 2, clear = 1)
 1-0    data bits (00 = 5, 01 = 6, 10 = 7, 11 = 8)
SeeAlso: #00302,#00307,#00308,#00309
--------S-1400-------------------------------
INT 14 - FOSSIL (Fido/Opus/Seadog Standard Interface Level) - INITIALIZE
        AH = 00h
        AL = initializing parameters
            7 - 6 - 5      4 - 3     2    1 - 0
            -BAUD RATE-    PARITY   STOP   WORD
                                    BITS  LENGTH
            000 19200 bd   00 none  0: 1  00: 5
            001 38400 bd   01 odd   1: 2  01: 6
            010   300 bd   11 even        10: 7
            011   600 bd                  11: 8
            100  1200 bd
            101  2400 bd
            110  4800 bd
            111  9600 bd (4800 on PCjr)
        DX = port number (0-3 or FFh if only performing non-I/O setup)
Return: AH = RS-232 status code bits (see #00301)
        AL = modem status bits
            bit 3: always 1
            bit 7: DCD - carrier detect
SeeAlso: #00300,AH=05h"FOSSIL",AH=81h"COMM-DRV",AH=82h"COURIERS"

Bitfields for FOSSIL RS-232 status:
Bit(s)  Description     (Table 00301)
 0      RDA - input data is available in buffer
 1      OVRN - data has been lost
 5      THRE - room is available in output buffer
 6      TSRE - output buffer empty
--------S-1400-------------------------------
INT 14 - Tandy 2000 - SERIAL - RESET COMM PORT
        AH = 00h
        AL = RS-232C parameters (see #00302)
        DL = port number
        DH = protocol
            bit 0: use XON/XOFF on received data
            bit 1: use XON/XOFF when transmitting
Return: AH = line status (see #00304)
        AL = modem status (see #00305)
Note:   this interrupt is identical to INT 53 on the Tandy 2000
SeeAlso: AH=04h"Tandy 2000",INT 53"Tandy 2000"
--------S-1400-------------------------------
INT 14 - MBBIOS - INITIALIZE PORT
        AH = 00h
        AL = port parameters (see #00302)
        DX = port number
Return: AH = line status (see #00304)
        AL = modem status (see #00305)
Note:   MBBIOS was written by H. Roy Engehausen
SeeAlso: AH=04h"MBBIOS",AH=05h"MBBIOS",AH=09h"MBBIOS"

Bitfields for MBBIOS port parameters:
Bit(s)  Description     (Table 00302)
 7-5    data rate
        (normally 110,150,300,600,1200,2400,4800,9600 bps;
        9600,14400,19200,28800,38400,57600,115200,330400 bps
        if the high-speed option is set)
 4-3    parity (00 or 10 = none, 01 = odd, 11 = even)
 2      stop bits (set = 2, clear = 1)
 1-0    data bits (00 = 5, 01 = 6, 10 = 7, 11 = 8)
SeeAlso: #00300
--------N-1400--DXFFFF-----------------------
INT 14 - Connection Manager - MODIFY DEFAULT CONNECTION PARAMETERS
        AH = 00h
        DX = FFFFh
        ES:DI -> vector string specifying new parameters
Return: AH = return code (00h,03h) (see #00303)
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
          serial ports over an IPX or NetBIOS-based network
Note:   if DX is 0-3 on entry, Connection Manager emulates the standard BIOS
          function, but redirects the port over the network; if DX is any other
          value, the call is chained
SeeAlso: AH=04h/DX=FFFFh,AH=08h/DX=FFFFh,AH=0Ah/DX=FFFFh

(Table 00303)
Values for Connection Manager return code:
 00h    successful
 01h    no such connection
 02h    invalid connection ID
 03h    invalid subvector found
 04h    communication error (check BH)
 06h    insufficient resources, retry later
 FFh    no data available
--------S-1401-------------------------------
INT 14 - SERIAL - WRITE CHARACTER TO PORT
        AH = 01h
        AL = character to write
        DX = port number (00h-03h) (04h-43h for Digiboard XAPCM232.SYS)
Return: AH bit 7 clear if successful
        AH bit 7 set on error
        AH bits 6-0 = port status (see #00304)
Notes:  various network and serial-port drivers support the standard BIOS
          functions with interrupt-driven I/O instead of the BIOS's polled I/O
        the 04/08/93 Compaq system ROM uses only the low two bits of DX
SeeAlso: AH=02h,AH=0Bh"FOSSIL",AX=8000h"ARTICOM",AH=89h,MEM 0040h:007Ch
--------N-1401--DXFFFF-----------------------
INT 14 - Connection Manager - SEND CHARACTER
        AH = 01h
        DX = FFFFh
        BH = character to send
Return: AH = return code (00h-02h,06h) (see #00303)
Notes:  if DX is 0-3 on entry, Connection Manager emulates the standard BIOS
          function, but redirects the port over the network; if DX is any other
          value, the call is chained
        this function is provided primarily for compatibility; AH=06h/DX=FFFFh
          is the preferred function because it provides better performance
SeeAlso: AH=02h/DX=FFFFh,AH=06h/DX=FFFFh,AH=09h/DX=FFFFh
--------S-1402-------------------------------
INT 14 - SERIAL - READ CHARACTER FROM PORT
        AH = 02h
        AL = 00h (ArtiCom)
        DX = port number (00h-03h (04h-43h for Digiboard XAPCM232.SYS))
Return: AH = line status (see #00304)
        AL = received character if AH bit 7 clear
Notes:  will timeout if DSR is not asserted, even if function 03h returns
          data ready
        various network and serial-port drivers support the standard BIOS
          functions with interrupt-driven I/O instead of the BIOS's polled I/O
        the 04/08/93 Compaq system ROM uses only the low two bits of DX
SeeAlso: AH=01h,AH=02h"FOSSIL",AH=84h,AH=FCh
--------S-1402-------------------------------
INT 14 - FOSSIL - RECEIVE CHARACTER WITH WAIT
        AH = 02h
        DX = port number (0-3)
Return: AL = character received
        AH = 00h
SeeAlso: AH=01h,AH=02h"SERIAL"
--------N-1402--DXFFFF-----------------------
INT 14 - Connection Manager - RECEIVE CHARACTER
        AH = 02h
        DX = FFFFh
        BH = character to send
Return: AH = return code (00h-02h,04h,FFh) (see #00303)
        BH = line status (see #00304)
        AL = received character (if any)
Notes:  if DX is 0-3 on entry, Connection Manager emulates the standard BIOS
          function, but redirects the port over the network; if DX is any other
          value, the call is chained
        this function is provided primarily for compatibility; AH=07h/DX=FFFFh
          is the preferred function because it provides better performance
SeeAlso: AH=02h/DX=FFFFh,AH=03h/DX=FFFFh,AH=06h/DX=FFFFh
--------S-1403-------------------------------
INT 14 - SERIAL - GET PORT STATUS
        AH = 03h
        AL = 00h (ArtiCom)
        DX = port number (00h-03h) (04h-43h for Digiboard XAPCM232.SYS)
Return: AH = line status (see #00304)
        AL = modem status (see #00305)
        AX = 9E00h if disconnected (ArtiCom)
Note:   the 04/08/93 Compaq system ROM uses only the low two bits of DX
SeeAlso: AH=00h,AH=07h"MultiDOS",AX=8000h"ARTICOM",AH=81h"COURIERS",AX=FD02h

Bitfields for serial line status:
Bit(s)  Description     (Table 00304)
 7      timeout
 6      transmit shift register empty
 5      transmit holding register empty
 4      break detected
 3      framing error
 2      parity error
 1      overrun error
 0      receive data ready
Note:   for COMM-DRV, if bit 7 is set, an error occurred, and may be retrieved
          through a separate call (see AX=8000h"COMM-DRV")

Bitfields for modem status:
Bit(s)  Description     (Table 00305)
 7      carrier detect
 6      ring indicator
 5      data set ready
 4      clear to send
 3      delta carrier detect
 2      trailing edge of ring indicator
 1      delta data set ready
 0      delta clear to send
--------N-1403--DXFFFF-----------------------
INT 14 - Connection Manager - RETURN COMMUNICATION PORT STATUS
        AH = 03h
        DX = FFFFh
        AL = connection ID
Return: AH = return code (00h-02h) (see #00303)
        BH = line status (see #00306)
        BL = modem status (see #00305) (only bits 4,5,7; all others zero)
Notes:  if DX is 0-3 on entry, Connection Manager emulates the standard BIOS
          function, but redirects the port over the network; if DX is any other
          value, the call is chained
SeeAlso: AH=00h/DX=FFFFh,AH=04h/DX=FFFFh,AH=0Ah/DX=FFFFh

Bitfields for Connection Manager line status:
Bit(s)  Description     (Table 00306)
 7      CTS changed
 6      current CTS state
 5      timeout
 4      break
 3      framing error
 2      parity error
 1      overrun
 0      current carrier state (0 active, 1 no carrier)
--------S-1404-------------------------------
INT 14 - SERIAL - EXTENDED INITIALIZE (CONVERTIBLE,PS)
        AH = 04h
        AL = break status
            00h if break
            01h if no break
        BH = parity (see #00307)
        BL = number of stop bits
            00h one stop bit
            01h two stop bits (1.5 if 5 bit word length)
        CH = word length (see #00308)
        CL = bps rate (see #00309)
        DX = port number
Return: AX = port status code (see #00304,#00305)
SeeAlso: AH=00h,AH=1Eh,AX=8000h"ARTICOM"

(Table 00307)
Values for serial port parity:
 00h    no parity
 01h    odd parity
 02h    even parity
 03h    stick parity odd
 04h    stick parity even
SeeAlso: #00300,#00308,#00309,#00310

(Table 00308)
Values for serial port word length:
 00h    5 bits
 01h    6 bits
 02h    7 bits
 03h    8 bits
SeeAlso: #00300,#00307,#00309,#00345

(Table 00309)
Values for serial port bps rate:
 00h    110 (19200 if ComShare installed)
 01h    150 (38400 if ComShare installed)
 02h    300
 03h    600 (14400 if ComShare installed)
 04h    1200
 05h    2400
 06h    4800 (28800 if ComShare installed)
 07h    9600
 08h    19200
---ComShare---
 09h    38400
 0Ah    57600
 0Bh    115200
SeeAlso: #00300,#00307,#00309,#00346,#00353,AH=36h,#00364,#00606,#02923
--------S-1404-------------------------------
INT 14 - Tandy 2000 - SERIAL - FLUSH COMM BUFFER
        AH = 04h
        DL = port number
        DH = protocol
            bit 0: use XON/XOFF on received data
            bit 1: use XON/XOFF when transmitting
Return: nothing
Desc:   clears the serial interface buffer
Note:   this interrupt is identical to INT 53 on the Tandy 2000
SeeAlso: AH=00h"Tandy 2000",INT 53"Tandy 2000"
--------S-1404-------------------------------
INT 14 - FOSSIL - INITIALIZE DRIVER
        AH = 04h
        DX = port number
        optionally BX=4F50h
                   ES:CX -> byte to be set upon ^C
Return: AX = 1954h (if successful)
        BL = maximum function number supported (excluding 7Eh and above)
        BH = revision of FOSSIL specification supported
        DTR is raised
Note:   the word at offset 6 in the interrupt handler contains 1954h, and the
          following byte contains the maximum function number supported; this
          can serve as an installation check
SeeAlso: AH=05h"FOSSIL",AH=1Ch,INT 11/AH=BCh
Index:  installation check;FOSSIL
--------S-1404-------------------------------
INT 14 - MultiDOS Plus IODRV - INITIALIZE PORT
        AH = 04h
Return: port initialized; if Hayes-compatible modem, a connection has been
          established
Note:   the port number is stored at offset BEh in the Task Control Block
          (see #00456 at INT 15/AH=13h"MultiDOS")
SeeAlso: AH=00h,AH=05h"MultiDOS",AH=20h"MultiDOS",INT 15/AH=13h"MultiDOS"
--------S-1404-------------------------------
INT 14 - Digiboard DigiCHANNEL PC/X* - CHANGE BAUD RATE
        AH = 04h
        AL = initializing parameters (see #00310)
        BX = baud rate
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            FFh error
SeeAlso: AH=05h"Digiboard"

Bitfields for Digiboard initializing parameters:
Bit(s)  Description     (Table 00310)
 7-5    unused
 4-3    parity (00 none, 01 odd, 11 even)
 2      stop bits (0 = one, 1 = two)
 1-0    data bits (00 = five, 01 = six, 10 = seven, 11 = eight)
SeeAlso: #00307,#00308
--------S-1404-------------------------------
INT 14 - MBBIOS - INSTALLATION CHECK
        AH = 04h
        DX = port number
Return: AX = AA55h if installed on specified port
SeeAlso: AH=00h"MBBIOS",AH=09h"MBBIOS"
--------N-1404--DXFFFF-----------------------
INT 14 - Connection Manager - OPEN COMMUNICATION
        AH = 04h
        DX = FFFFh
        ES:DI -> Connection Request protocol vector (see #00311)
Return: AH = return code
            00h successful
                AL = connection ID
                BH = connection type
                    00h direct connection or no dialing
                    01h Connection Server dialed phone
            01h no response from Connection Server
            03h invalid request
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
          serial ports over an IPX or NetBIOS-based network
Desc:   initiate a connection to the Connection Server listed in the current
          Client parameter set
Notes:  if DX is 0-3 on entry, Connection Manager emulates the standard BIOS
          function, but redirects the port over the network; if DX is any other
          value, the call is chained
        all subvectors of the Connection Request vector are optional; if
          missing, default values are provided by the default connection
          parameter set
SeeAlso: AH=00h/DX=FFFFh,AH=05h/DX=FFFFh,AH=06h/DX=FFFFh,AH=07h/DX=FFFFh
SeeAlso: AH=0Ah/DX=FFFFh,AH=0Ch/DX=FFFFh

Format of Connection Manager protocol command vector:
Offset  Size    Description     (Table 00311)
 00h    WORD    (big-endian) total length of command (including this word)
 02h    WORD    (big-endian) command code
                EF01h Connection Request
                EF06h Modify Connection Parameters
 04h  N BYTEs   list of subvectors (see #00313)
                allowable subvector types are 01h-04h,17h,18h for command code
                  EF01h; 03h,04h for command code EF06h (see #00312)

(Table 00312)
Values for Connection Manager subvector type code:
 01h    Connection ID
 02h    Destination ID
 03h    Asynchronous line parameters
 04h    Data transfer parameters
 09h    Line speed
 0Ah    Serial coding
 0Bh    Packet size
 0Ch    Timers
 0Dh    Special characters
 0Eh    Target ID
 0Fh    Telephone number
 10h    ASCII destination ID
 11h    Parity
 12h    Bits per character
 13h    Number of stop bits
 14h    Packet timer
 15h    Intercharacter timer
 17h    Flags
 18h    Parameter ranges
 19h    Flow control

Format of Connection Manager subvector:
Offset  Size    Description     (Table 00313)
 00h    BYTE    length of subvector
 01h    BYTE    type code (see #00312)
 02h N-2 BYTEs  data, which may include subvectors
SeeAlso: #00314,#00315,#00316,#00317,#00318,#00319,#00320,#00321,#00322,#00323,#00324
SeeAlso: #00325,#00326,#00328,#00329,#00330,#00331,#00332,#00333,#00311

Format of Connection ID subvector:
Offset  Size    Description     (Table 00314)
 00h    BYTE    03h (length)
 01h    BYTE    01h (subvector "Connection ID")
 02h    BYTE    connection ID
SeeAlso: #00313

Format of Destination ID subvector:
Offset  Size    Description     (Table 00315)
 00h    BYTE    length
 01h    BYTE    02h (subvector "Destination ID")
 02h  N BYTEs   subvector(s) of type 0Eh, 0Fh, or 10h
SeeAlso: #00313

Format of Asynchronous line parameters subvector:
Offset  Size    Description     (Table 00316)
 00h    BYTE    length
 01h    BYTE    03h (subvector "Asynchronous line parameters")
 02h  N BYTEs   subvector(s) of type 09h, 0Ah, or 19h
SeeAlso: #00313

Format of Data transfer parameters subvector:
Offset  Size    Description     (Table 00317)
 00h    BYTE    length
 01h    BYTE    04h (subvector "Data transfer parameters")
 02h  N BYTEs   subvector(s) of type 0Bh, 0Ch, or 0Dh
SeeAlso: #00313

Format of Line speed subvector:
Offset  Size    Description     (Table 00318)
 00h    BYTE    04h (length)
 01h    BYTE    09h (subvector "Line speed")
 02h    WORD    bit map, highest set bit selects speed
                bit 0: 2400
                bits 1-7: 1800, 1200, 600, 300, 115200, 150, 110 bps
                bits 8-15: 57600, 38400, 19200, 14400, 9600, 7200, 4800, 3600
SeeAlso: #00313

Format of Serial coding subvector:
Offset  Size    Description     (Table 00319)
 00h    BYTE    length
 01h    BYTE    0Ah (subvector "Serial coding")
 02h  N BYTEs   subvector(s) of type 11h, 12h, or 13h
SeeAlso: #00313

Format of Packet size subvector:
Offset  Size    Description     (Table 00320)
 00h    BYTE    04h (length)
 01h    BYTE    0Bh (subvector "Packet size")
 02h    WORD    (big-endian) packet size, 1 to 1024
SeeAlso: #00313

Format of Timers subvector:
Offset  Size    Description     (Table 00321)
 00h    BYTE    length
 01h    BYTE    0Ch (subvector "Timers")
 02h  8 BYTEs   subvector of type 14h or 15h
SeeAlso: #00313

Format of Special characters subvector:
Offset  Size    Description     (Table 00322)
 00h    BYTE    length
 01h    BYTE    0Dh (subvector "Special characters")
 02h  N BYTEs   list of ASCII characters to be used as EOM or EOB
SeeAlso: #00313

Format of Target ID:
Offset  Size    Description     (Table 00323)
 00h    BYTE    length
 01h    BYTE    0Eh (subvector "Target ID")
 02h  N BYTEs   target ID, 1-16 bytes
SeeAlso: #00313

Format of Telephone number subvector:
Offset  Size    Description     (Table 00324)
 00h    BYTE    length
 01h    BYTE    0Fh (subvector "Telephone number")
 02h  N BYTEs   telephone number
SeeAlso: #00313

Format of ASCII destination ID subvector:
Offset  Size    Description     (Table 00325)
 00h    BYTE    length
 01h    BYTE    10h (subvector "ASCII destination ID")
 02h  N BYTEs   destination ID
SeeAlso: #00313

Format of Parity subvector:
Offset  Size    Description     (Table 00326)
 00h    BYTE    03h (length)
 01h    BYTE    11h (subvector "Parity")
 02h    BYTE    parity type (see #00327)
SeeAlso: #00313

Bitfields for Connection Manager parity type:
Bit(s)  Description     (Table 00327)
 7      odd
 6      even
 5      mark
 4      space
 3      none
SeeAlso: #00326

Format of Bits per character subvector:
Offset  Size    Description     (Table 00328)
 00h    BYTE    03h (length)
 01h    BYTE    12h (subvector "Bits per character")
 02h    BYTE    bits per character
                bit 7: seven
                bit 6: eight
SeeAlso: #00313

Format of Number of stop bits subvector:
Offset  Size    Description     (Table 00329)
 00h    BYTE    03h (length)
 01h    BYTE    13h (subvector "Number of stop bits")
 02h    BYTE    stop bits
                bit 7: one
                bit 6: 1.5
                bit 5: two
SeeAlso: #00313

Format of Packet timer and Intercharacter timer subvectors:
Offset  Size    Description     (Table 00330)
 00h    BYTE    04h (length)
 01h    BYTE    subvector type
                14h Packet timer
                15h Intercharacter timer
 02h    WORD    (big-endian) unit of value representing 20ms
SeeAlso: #00313

Format of Flags subvector:
Offset  Size    Description     (Table 00331)
 00h    BYTE    03h (length)
 01h    BYTE    17h (subvector "Flags")
 02h    BYTE    flags
                bit 7: queueing requested
SeeAlso: #00313

Format of Parameter ranges subvector:
Offset  Size    Description     (Table 00332)
 00h    BYTE    length
 01h    BYTE    18h (subvector "Parameter ranges")
 02h  N BYTEs   subvector(s) of type 09h, 11h, 12h, or 13h
SeeAlso: #00313

Format of Flow control subvector:
Offset  Size    Description     (Table 00333)
 00h    BYTE    length (02h-04h)
 01h    BYTE    19h (subvector "Flow control")
 02h    BYTE    XOFF character
 03h    BYTE    XON character
Note:   if length is 02h, flow control is disabled; if length is 03h, any
          character will be accepted as XON after an XOFF
SeeAlso: #00313
--------S-140400-----------------------------
INT 14 - Microsoft Systems Journal TSRCOMM INT14 - INSTALLATION CHECK
        AX = 0400h
Return: AX = 0FF0h
SeeAlso: AX=0401h,AX=0408h
--------S-140401-----------------------------
INT 14 - Microsoft Systems Journal TSRCOMM INT14 - INITIALIZE MODE
        AX = 0401h
        CX = mode
Return: nothing
SeeAlso: AX=0400h,AX=0402h
--------S-140402-----------------------------
INT 14 - Microsoft Systems Journal TSRCOMM INT14 - EXTENDED INITIALIZE
        AX = 0402h
        CL = parameters
Return: nothing
SeeAlso: AX=0400h,AX=0401h
--------S-140403-----------------------------
INT 14 - Microsoft Systems Journal TSRCOMM INT14 - SET TIMEOUT
        AX = 0403h
        CX = timeout
Return: nothing
SeeAlso: AX=0400h
--------S-140404-----------------------------
INT 14 - Microsoft Systems Journal TSRCOMM INT14 - CLEAR THE RECEIVE BUFFER
        AX = 0404h
Return: nothing
SeeAlso: AX=0400h,AX=0405h,AX=0406h
--------S-140405-----------------------------
INT 14 - Microsoft Systems Journal TSRCOMM INT14 - GET RECEIVE BUFFER COUNT
        AX = 0405h
Return: AX = number of characters in buffer
SeeAlso: AX=0400h,AX=0404h,AX=0407h
--------S-140406-----------------------------
INT 14 - Microsoft Systems Journal TSRCOMM INT14 - CLEAR THE TRANSMIT BUFFER
        AX = 0406h
Return: nothing
SeeAlso: AX=0400h,AX=0404h,AX=0407h
--------S-140407-----------------------------
INT 14 - Microsoft Systems Journal TSRCOMM INT14 - GET TRANSMIT BUFFER COUNT
        AX = 0407h
Return: AX = number of characters in the buffer
SeeAlso: AX=0400h,AX=0405h,AX=0406h
--------S-140408-----------------------------
INT 14 - Microsoft Systems Journal TSRCOMM INT14 - UNINSTALL
        AX = 0408h
Return: nothing
SeeAlso: AX=0400h
--------S-1405-------------------------------
INT 14 - SERIAL - EXTENDED COMMUNICATION PORT CONTROL (CONVERTIBLE,PS)
        AH = 05h
        AL = function
            00h read modem control register
              Return: BL = modem control register (see #00334)
                      AH = status
            01h write modem control register
              BL = modem control register (see #00334)
              Return: AX = status
        DX = port number
Note:   also supported by ArtiCom
SeeAlso: AH=00h,AH=1Fh,AX=8000h"ARTICOM",AH=FBh

Bitfields for modem control register:
Bit(s)  Description     (Table 00334)
 0      data terminal ready
 1      request to send
 2      OUT1
 3      OUT2
 4      LOOP
 5-7    reserved
--------S-1405-------------------------------
INT 14 - FOSSIL - DEINITIALIZE DRIVER
        AH = 05h
        DX = port number
Return: none
        DTR is not affected
SeeAlso: AH=00h,AH=04h"FOSSIL",AH=1Dh,AH=8Dh
--------S-1405-------------------------------
INT 14 - MultiDOS Plus IODRV - READ CHARACTER FROM PORT
        AH = 05h
        AL = timeout in seconds (00h = never)
Return: AL = status
            00h successful
                AH = character read
            01h read error
            02h timed out
            other modem status (CTS, DSR) changed
Note:   the port number is stored at offset BEh in the Task Control Block
SeeAlso: AH=02h,AH=04h"MultiDOS",AH=06h"MultiDOS",AH=22h"MultiDOS"
SeeAlso: INT 15/AH=13h"MultiDOS"
--------S-1405-------------------------------
INT 14 - Digiboard DigiCHANNEL PC/X* - CHANGE PROTOCOL
        AH = 05h
        AL = protocol (see #00335)
        BH = new XOFF character (00h = current)
        BL = new XON character (00h = current)
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            FFh error
SeeAlso: AH=04h"Digiboard"

Bitfields for Digiboard protocol:
Bit(s)  Description     (Table 00335)
 7-4    unused
 3      RTS/CTS
 2      DSR
 1,0    XON/XOFF
--------S-1405-------------------------------
INT 14 - MBBIOS - DROP DTR AND RTS
        AH = 05h
        DX = port number
Return: none
SeeAlso: AH=00h"MBBIOS",AH=06h"MBBIOS",AH=06h"FOSSIL"
--------S-1405-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - CHANGE PORT PROTOCOL
        AH = 05h
        AL = new port protocol (see #00336)
        BH = new XOFF character
        BL = new XON character
        DX = port number
Return: AH = FFh if invalid protocol
SeeAlso: AH=00h,AH=04h"SERIAL",AH=06h"PC-MOS"

Bitfields for PC-MOS/386 serial port protocol:
Bit(s)  Description     (Table 00336)
 7      set to enable/disable CD monitoring, clear to set protocol
---bit 7 set---
 4      CD monitoring enabled
 5      automatic restart enabled
---bit 7 clear---
 0      receive XON/XOFF
 1      transmit XON/XOFF
 2      DTR/DSR
 3      RTS/CTS
--------N-1405--DXFFFF-----------------------
INT 14 - Connection Manager - CLOSE COMMUNICATION
        AH = 05h
        DX = FFFFh
        AL = connection ID
Return: AH = return code
            00h successful
            01h no such connection
            02h invalid connection ID
                AL = correct connection ID
Desc:   terminate existing connection to allow another one to be established
Note:   if DX is 0-3 on entry, Connection Manager emulates the standard BIOS
          function, but redirects the port over the network; if DX is any other
          value, the call is chained
SeeAlso: AH=04h/DX=FFFFh,AH=0Dh/DX=FFFFh
--------S-1406-------------------------------
INT 14 - FOSSIL - RAISE/LOWER DTR
        AH = 06h
        DX = port
        AL = DTR state to be set
            00h = lower
            01h = raise
Return: nothing
SeeAlso: AH=05h"MBBIOS",AH=1Ah
--------S-1406-------------------------------
INT 14 - MultiDOS Plus IODRV - WRITE CHARACTER TO PORT
        AH = 06h
        AL = character
Return: AL = status
            00h successful
Notes:  the port number is stored at offset BEh in the Task Control Block
        if output queue is full, the calling task is blocked until the
          character can be stored
SeeAlso: AH=01h,AH=04h"MultiDOS",AH=05h"MultiDOS",AH=21h"MultiDOS"
SeeAlso: INT 15/AH=13h"MultiDOS"
--------S-1406-------------------------------
INT 14 - MBBIOS - RAISE DTR AND RTS
        AH = 06h
        DX = port number
Return: none
SeeAlso: AH=05h"MBBIOS",AH=07h"MBBIOS"
--------S-1406-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - DRIVER 'ID' FUNCTION
        AH = 06h
        DX = port number
Return: AH bit 7 set
        AL = number of highest function supported by driver
Program: PC-MOS/386 v5.01 is a multitasking, multiuser MS-DOS 5.0-compatible
          operating system by The Software Link, Inc.
SeeAlso: AH=18h"PC-MOS"
--------N-1406-------------------------------
INT 14 - TelAPI - WRITE BLOCK
        AH = 06h
        CX = number of characters to write
        DX = port number
        ES:DI -> buffer containing data
Return: AX = number of characters actually sent (negative on error)
        CX = ???
SeeAlso: AH=07h"TelAPI",AH=E0h"TelAPI",AH=E3h"TelAPI"
--------N-1406--DXFFFF-----------------------
INT 14 - Connection Manager - SEND CHARACTER BLOCK
        AH = 06h
        DX = FFFFh
        AL = connection ID
        CX = number of characters to send
        ES:DI -> buffer containing data to be sent
Return: AH = return code (see #00303)
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
          serial ports over an IPX or NetBIOS-based network
SeeAlso: AH=04h/DX=FFFFh,AH=07h/DX=FFFFh,AH=09h/DX=FFFFh
--------S-1407-------------------------------
INT 14 - FOSSIL - RETURN TIMER TICK PARAMETERS
        AH = 07h
Return: AL = timer tick interrupt number
        AH = ticks per second on interrupt number in AL
        DX = approximate number of milliseconds per tick
SeeAlso: AH=16h
--------S-1407-------------------------------
INT 14 - MultiDOS Plus IODRV - GET PORT STATUS
        AH = 07h
Return: CL = modem status (see #00305)
        CH = character at head of input queue (if any)
        DX = number of characters in input queue
Note:   the port number is stored at offset BEh in the Task Control Block
SeeAlso: AH=03h,AH=05h"MultiDOS",AH=08h"MultiDOS",AH=09h"MultiDOS"
SeeAlso: AH=23h"MultiDOS",INT 15/AH=13h"MultiDOS"
--------S-1407-------------------------------
INT 14 - MBBIOS - SEND BREAK
        AH = 07h
        DX = port number
Return: none
SeeAlso: AH=06h"MBBIOS",AH=FAh"EBIOS"
--------S-1407-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - SEND RS-232 BREAK
        AH = 07h
        BX = duration of break in clock ticks
        DX = port number
Return: nothing
--------N-1407-------------------------------
INT 14 - TelAPI - READ BLOCK
        AH = 07h
        CX = length of buffer in bytes
        DX = port number
        ES:DI -> buffer for data
Return: AX > 0000h number of characters actually read
        AX = 0000h host has closed connection
        AX < 0000h error code (see #00397)
        CX = ???
Note:   translates CRLF into local EOL if the connection is in ASCII mode,
          negotiates various Telnet options, and immediately executes several
          different Telnet action commands
SeeAlso: AH=06h"TelAPI",AH=E0h"TelAPI",AH=E2h"TelAPI"
--------N-1407--DXFFFF-----------------------
INT 14 - Connection Manager - RECEIVE CHARACTER BLOCK
        AH = 07h
        DX = FFFFh
        AL = connection ID
        BL = flag
            00h wait for data
            nonzero do not wait if no data avaiable
        CX = size of receive buffer
        ES:DI -> buffer for received characters
Return: AH = return code (00h-02h,04h,FFh) (see #00303)
        BH = line status (see #00306)
        CX = number of characters received
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
          serial ports over an IPX or NetBIOS-based network
SeeAlso: AH=01h/DX=FFFFh,AH=04h/DX=FFFFh,AH=06h/DX=FFFFh
--------S-1408-------------------------------
INT 14 - FOSSIL - FLUSH OUTPUT BUFFER WAITING TILL ALL OUTPUT IS DONE
        AH = 08h
        DX = port number
Return: nothing
SeeAlso: AH=09h"FOSSIL"
--------S-1408-------------------------------
INT 14 - MultiDOS Plus 4.0 IODRV - GET AND RESET PORT LINE STATUS
        AH = 08h
Return: AL = line status (see #00304)
        AH destroyed
Notes:  the port number is stored at offset BEh in the Task Control Block
        on every line status change, the line status is ORed with the line
          status accumulator; this function returns the accumulator and clears
          it
SeeAlso: AH=03h,AH=04h"MultiDOS",AH=07h"MultiDOS",INT 15/AH=13h"MultiDOS"
--------S-1408-------------------------------
INT 14 - Digiboard DigiCHANNEL PC/X* - ALTERNATE STATUS CHECK
        AH = 08h
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = RS232 status bits (see #00304 at AH=03h)
        ZF set if no characters queued
        ZF clear if character available
            AL = next character
SeeAlso: AH=03h,AH=08h"PC-MOS",AH=09h"Digiboard",AH=14h"Digiboard"
--------S-1408-------------------------------
INT 14 - MBBIOS - NON-DESTRUCTIVE READ
        AH = 08h
        DX = port number
Return: AL = character (if AH bit 0 set)
        AH = status (see #00304)
SeeAlso: AH=0Bh"MBBIOS",AH=0Ch"FOSSIL"
--------S-1408-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - INPUT STATUS CHECK
        AH = 08h
        DX = port number
Return: CF set if carrier loss detected
        ZF set if input buffer empty
        ZF clear if characters available
            AL = next character dequeued
--------N-1408--DXFFFF-----------------------
INT 14 - Connection Manager - RETURN DEFAULT CONNECTION PARAMETERS
        AH = 08h
        DX = FFFFh
        CX = size of buffer for parameters or 0000h to get length
        ES:DI -> buffer for parameter vector (see #00311)
Return: AH = return code
            00h successful
                CX = number of bytes required (if CX=0000h on entry)
                CX = number of bytes omitted for lack of space (if CX nonzero)
            nonzero invalid request
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
          serial ports over an IPX or NetBIOS-based network
SeeAlso: AH=00h/DX=FFFFh,AH=0Fh/DX=FFFFh
--------S-1409-------------------------------
INT 14 - FOSSIL - PURGE OUTPUT BUFFER THROWING AWAY ALL PENDING OUTPUT
        AH = 09h
        DX = port number
Return: nothing
SeeAlso: AH=08h"FOSSIL",AH=0Ah"FOSSIL",AH=88h
--------S-1409-------------------------------
INT 14 - MultiDOS Plus IODRV - RESET PORT STATUS
        AH = 09h
Return: modem status byte cleared
Note:   the port number is stored at offset BEh in the Task Control Block
SeeAlso: AH=04h"MultiDOS",AH=07h"MultiDOS",INT 15/AH=13h"MultiDOS"
--------S-1409-------------------------------
INT 14 - Digiboard DigiCHANNEL PC/X* - CLEAR BUFFERS
        AH = 09h
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            FFh error
SeeAlso: AH=08h"Digiboard",AH=0Ah"Digiboard",AH=10h"Digiboard"
--------S-1409-------------------------------
INT 14 - MBBIOS - GET/SET OPTIONS
        AH = 09h
        AL = option byte (see #00337)
        DX = port number???
Return: AL = old option byte
SeeAlso: AH=00h"MBBIOS",AH=04h"MBBIOS",AH=10h"FOSSIL"

Bitfields for MBBIOS option byte:
Bit(s)  Description     (Table 00337)
 0      transmit buffering enabled
 2      hardware handshaking enabled
 5      high-speed option enabled (see AH=00h"MBBIOS",#00302)
 other  reserved
--------S-1409-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - RESET I/O BUFFER POINTERS
        AH = 09h
        DX = port number
Return: nothing
SeeAlso: AH=13h"PC-MOS"
--------N-1409--DXFFFF-----------------------
INT 14 - Connection Manager - SEND BREAK
        AH = 09h
        DX = FFFFh
        AL = connection ID
Return: AH = return code (00h-02h) (see #00303 at AH=00h/DX=FFFFh)
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
          serial ports over an IPX or NetBIOS-based network
SeeAlso: AH=02h/DX=FFFFh,AH=03h/DX=FFFFh
--------S-140A-------------------------------
INT 14 - FOSSIL - PURGE INPUT BUFFER THROWING AWAY ALL PENDING INPUT
        AH = 0Ah
        DX = port number
Return: nothing
SeeAlso: AH=09h"FOSSIL",AH=85h
--------S-140A-------------------------------
INT 14 - Digiboard DigiCHANNEL PC/X* - INPUT QUEUE CHECK
        AH = 0Ah
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AX = number of characters available in buffer
Note:   this function is also supported by the PC-MOS/386 v5.01 $serial.sys
SeeAlso: AH=09h"Digiboard",AH=0Dh"Digiboard"
--------S-140A-------------------------------
INT 14 - MBBIOS - WRITE BUFFER
        AH = 0Ah
        CX = count
        ES:DI -> buffer (see #00338)
Return: AX = status (see #00304,#00305)
        CX = unsent character count
        DI updated
Note:   the PACCOM version of MBBIOS does not use CX or ES:DI; instead, ES
          contains the segment of a buffer containing the packet to be sent,
          which by default will be freed once the packet has been sent.  Use
          AH=0Ch"MBBIOS" to allocate the buffer.
SeeAlso: AH=01h,AH=0Bh"MBBIOS",AH=0Ch"MBBIOS",AH=19h"FOSSIL"

Format of MBBIOS PACCOM buffer:
Offset  Size    Description     (Table 00338)
 00h 504 BYTEs  data area
1F8h    WORD    length of data in data area
1FAh    BYTE    flags/status
                bit 7: don't discard buffer after transmitting data
                bit 6: buffer has been transmitted
1FBh    BYTE    reserved (0) for additional flags/status
1FCh    WORD    user data
1FEh    WORD    MBBIOS-internal pointer to next buffer
--------N-140A--DXFFFF-----------------------
INT 14 - Connection Manager - MODIFY ACTIVE CONNECTION PARAMETERS
        AH = 0Ah
        DX = FFFFh
        ES:DI -> vector string containing new parameters (see #00311)
Return: AH = return code (00h-03h,06h) (see #00303)
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
          serial ports over an IPX or NetBIOS-based network
Note:   any subvectors valid for the Change Parameters command replace the
          existing values in the current set
SeeAlso: AH=00h/DX=FFFFh,AH=0Fh/DX=FFFFh
--------S-140B-------------------------------
INT 14 - FOSSIL - TRANSMIT NO WAIT
        AH = 0Bh
        AL = character
        DX = port number
Return: AX = result
            0000h character not accepted
            0001h character accepted
SeeAlso: AH=01h
--------S-140B-------------------------------
INT 14 - MBBIOS - READ BUFFER
        AH = 0Bh
        CX = size of buffer
        ES:DI -> buffer
Return: AH = composite line status (see #00304) formed by ORing all statuses
                  on receive interrupts; bit 0 set if additional characters
                  available
        AL = composite modem status (see #00305) formed by ORing all statuses
        CX = number of characters actually read
        DI updated
Note:   the PACCOM version of MBBIOS does not use CX or ES:DI on call,
          instead returning ES set to the segment of the buffer containing a
          received packet, or 0000h if no packets available; the buffer may
          be freed with AH=0Ch"MBBIOS"
SeeAlso: AH=02h,AH=08h"MBBIOS",AH=0Ah"MBBIOS",AH=0Ch"MBBIOS",AH=18h"FOSSIL"
--------N-140B--DXFFFF-----------------------
INT 14 - Connection Manager - PREPARE FOR INBOUND CONNECTION
        AH = 0Bh
        DX = FFFFh
        AL = service name
            00h use parameter file or default
            01h use specified name
                ES:DI -> 16-byte blank-padded name
        BH = connection notification
            00h program awaiting connection, don't notify user
            01h notify user on connecting
        BL = connection type
            00h connection will use Connection Manager API
Return: AH = return code (00h-02h) (see #00303 at AH=00h/DX=FFFFh)
        AL = connection ID if AH=00h
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
          serial ports over an IPX or NetBIOS-based network
SeeAlso: AH=04h/DX=FFFFh,AH=0Ch/DX=FFFFh,AH=10h/DX=FFFFh
--------S-140C-------------------------------
INT 14 - FOSSIL - NON-DESTRUCTIVE READ AHEAD
        AH = 0Ch
        DX = port number
Return: AX = FFFFh character not available
        AX = 00xxh character xx available
SeeAlso: AH=08h"MBBIOS",AH=20h"FOSSIL"
--------S-140C-------------------------------
INT 14 - MBBIOS PACCOM support - BUFFER MANAGEMENT
        AH = 0Ch
        ES = segment of buffer to free, or 0000h to allocate new buffer
Return: ES = segment of allocated buffer (if ES=0000h on entry)
Note:   the PACCOM version of MBBIOS uses only ES as buffer address for
          AH=0Ah and AH=0Bh
SeeAlso: AH=0Ah"MBBIOS",AH=0Bh"MBBIOS"
--------N-140C--DXFFFF-----------------------
INT 14 - Connection Manager - TEST FOR INBOUND CONNECTION REQUEST
        AH = 0Ch
        DX = FFFFh
        AL = connection ID from AH=0Bh/DX=FFFFh
Return: AH = return code (00h-03h) (see also #00303 at AH=00h/DX=FFFFh)
            03h not prepared for inbound connection
        AL = connection ID (if AH=00h) or correct connection ID (if AH=02h)
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
          serial ports over an IPX or NetBIOS-based network
SeeAlso: AH=03h/DX=FFFFh,AH=04h/DX=FFFFh,AH=0Bh/DX=FFFFh
--------S-140D-------------------------------
INT 14 - FOSSIL - KEYBOARD READ WITHOUT WAIT
        AH = 0Dh
Return: AX = result
            FFFFh character not available
            xxyyh standard IBM-style scan code
SeeAlso: AH=0Eh
--------S-140D-------------------------------
INT 14 - Digiboard DigiCHANNEL PC/X* - GET POINTER TO CH_KEY_RDY FLAG
        AH = 0Dh
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: ES:BX -> CH_KEY_RDY flag (see #00339)
SeeAlso: AH=0Ah"Digiboard"

(Table 00339)
Values for Digiboard CH_KEY_RDY flag:
 00h    receive buffer empty
 FFh    characters available
--------S-140D-------------------------------
INT 14 - MBBIOS PACCOM support - SET TXD
        AH = 0Dh
        AL = new setting (FFh = 1.0)
Return: nothing
Desc:   specify the time from RTS to start or packet
SeeAlso: AX=0D00h,AH=0Eh"MBBIOS",AH=0Fh"MBBIOS"
--------N-140D--DXFFFF-----------------------
INT 14 - Connection Manager - TERMINATE CONNECTION CLIENT ACTIVITY
        AH = 0Dh
        DX = FFFFh
Return: AH = return code
            00h successful
            nonzero operation not terminated
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
          serial ports over an IPX or NetBIOS-based network
Desc:   end all Connection Client TSR activity to allow it to be removed from
          memory
SeeAlso: AH=05h/DX=FFFFh,AH=6Fh/BX=FFFFh
--------S-140D00-----------------------------
INT 14 - MBBIOS - GET AVAILABLE BYTES
        AX = 0D00h
Return: AX = bytes in transmit buffer
        CX = bytes in receive buffer
SeeAlso: AH=0Ah"MBBIOS",AH=0Bh"MBBIOS"
--------S-140D01-----------------------------
INT 14 - MBBIOS - LOWER ALL MODEM CONTROL SIGNALS
        AX = 0D01h
Return: nothing
Note:   this function lowers DTR, RTS, etc.
SeeAlso: AX=0D02h
--------S-140D02-----------------------------
INT 14 - MBBIOS - RAISE ALL MODEM CONTROL SIGNALS
        AX = 0D02h
Return: nothing
Note:   this function raises DTR, RTS, etc.
SeeAlso: AX=0D01h
--------S-140D03-----------------------------
INT 14 - MBBIOS - SET HANDSHAKE BYTE
        AX = 0D03h
        CL = new handshake byte
Return: CL = previous handshake byte
Note:   this function lowers DTR, RTS, etc.
--------S-140E-------------------------------
INT 14 - FOSSIL - KEYBOARD READ WITH WAIT
        AH = 0Eh
Return: AX = xxyyh standard IBM-style scan code
SeeAlso: AH=0Dh"FOSSIL"
--------S-140E-------------------------------
INT 14 - Digiboard DigiCHANNEL PC/X* - WRITE STRING
        AH = 0Eh
        CX = number of characters to write
        ES:BX -> string
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AX = number of characters actually written
        ZF clear if successful
        ZF set on error
SeeAlso: AH=0Fh"Digiboard"
--------S-140E-------------------------------
INT 14 - MBBIOS PACCOM support - SET PERSISTENCE
        AH = 0Eh
        AL = new setting (FFh = 1.0)
Return: nothing
Desc:   specify the time from end of DCD to RTS
SeeAlso: AH=0Dh"MBBIOS",AH=0Fh"MBBIOS"
--------N-140E--DXFFFF-----------------------
INT 14 - Connection Manager - SET HARDWARE FLOW STATE
        AH = 0Eh
        DX = FFFFh
        AL = connection ID from AH=04h/DX=FFFFh
        BL = RTS state (00h off, 01h on)
Return: AH = return code (00h-03h) (see also #00303 at AH=00h/DX=FFFFh)
            03h invalid request (BL not 00h or 01h)
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
          serial ports over an IPX or NetBIOS-based network
SeeAlso: AH=03h/DX=FFFFh,AH=0Ah/DX=FFFFh
--------S-140F-------------------------------
INT 14 - FOSSIL - ENABLE/DISABLE FLOW CONTROL
        AH = 0Fh
        AL = bit mask describing requested flow control (see #00340)
        DX = port number
Return: nothing
SeeAlso: AH=09h"MBBIOS",AH=10h"FOSSIL"

Bitfields for FOSSIL requested flow control:
Bit(s)  Description     (Table 00340)
 0      XON/XOFF on transmit (watch for XOFF while sending)
 1      CTS/RTS (CTS on transmit/RTS on receive)
 2      reserved
 3      XON/XOFF on receive (send XOFF when buffer near full)
 4-7    all 1
--------S-140F-------------------------------
INT 14 - Digiboard DigiCHANNEL PC/X* - READ STRING
        AH = 0Fh
        CX = number of characters to read
        ES:BX -> buffer
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AX = number of characters read
        ZF clear if successful
        ZF set on error (line status or wrong number of characters)
SeeAlso: AH=0Eh"Digiboard"
--------S-140F-------------------------------
INT 14 - MBBIOS PACCOM support - SET SLOT TIME
        AH = 0Fh
        AL = new setting in clock ticks
Return: nothing
Desc:   specify the time from end of DCD to RTS
SeeAlso: AH=0Dh"MBBIOS",AH=0Eh"MBBIOS",AH=10h"MBBIOS"
--------N-140F--DXFFFF-----------------------
INT 14 - Connection Manager - RETURN ACTIVE CONNECTION PARAMETERS
        AH = 0Fh
        DX = FFFFh
        AL = connection ID
        CX = size of buffer or 0000h to get length of returned vector
        ES:DI -> buffer for connection parameter vector (see #00311)
Return: AH = return code (00h-02h,06h) (see #00303 at AH=00h/DX=FFFFh)
        CX = number of bytes which could not be returned because the given
              buffer was too small
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
          serial ports over an IPX or NetBIOS-based network
SeeAlso: AH=08h/DX=FFFFh,AH=0Ah/DX=FFFFh
--------S-1410-------------------------------
INT 14 - FOSSIL - EXTENDED ^C/^K CHECKING AND TRANSMIT ON/OFF
        AH = 10h
        AL = bit mask
            bit 0: enable/disable ^C/^K checking
            bit 1: enable/disable the transmitter
        DX = port number
Return: nothing
SeeAlso: AH=0Fh"FOSSIL"
--------S-1410-------------------------------
INT 14 - Digiboard DigiCHANNEL PC/X* - CLEAR RECEIVE BUFFER
        AH = 10h
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            FFh error
SeeAlso: AH=09h"Digiboard",AH=11h"Digiboard"
--------S-1410-------------------------------
INT 14 - MBBIOS PACCOM support - SET CRC WAIT
        AH = 10h
        AL = new setting in clock ticks (should be at least 5 character times)
Return: nothing
Desc:   specify the time from start of last character to dropping RTS
SeeAlso: AH=0Dh"MBBIOS",AH=0Fh"MBBIOS"
--------N-1410--DXFFFF-----------------------
INT 14 - Connection Manager - QUERY SERVICE NAMES
        AH = 10h
        DX = FFFFh
        CL = subfunction
            00h search first
            01h search next
        ES:DI -> pattern buffer (see #00341)
Return: AH = return code (00h,01h,03h,06h) (see also #00303 at AH=00h/DX=FFFFh)
            01h no (more) matching names
            03h invalid request
        ES:DI buffer filled with reply buffer (see #00341) containing matched
                  name if AH=00h
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
          serial ports over an IPX or NetBIOS-based network
Desc:   obtain the names of groups and lines available for connection requests,
          and the names of active Connection Servers
SeeAlso: AH=04h/DX=FFFFh,AH=0Bh/DX=FFFFh

Format of Connection Manager pattern/reply buffer:
Offset  Size    Description     (Table 00341)
 00h    WORD    length of pattern (30h or 32h)
 02h 16 BYTEs   server pattern or name
 12h 16 BYTEs   group pattern or name
 22h 16 BYTEs   line pattern or name
 23h    BYTE    (optional) ???
 24h    BYTE    (optional, returned) current line status
                00h available
                01h out of service
                02h currently allocated to a connection
Note:   pattern may include '?' wildcard to match any character
--------S-1411-------------------------------
INT 14 - FOSSIL - SET CURRENT CURSOR LOCATION
        AH = 11h
        DH = row
        DL = column
Return: nothing
Note:   this is the same as INT 10/AH=02h
SeeAlso: AH=12h"FOSSIL"
--------S-1411-------------------------------
INT 14 - Digiboard DigiCHANNEL PC/X* - CLEAR TRANSMIT BUFFER
        AH = 11h
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            FFh error
SeeAlso: AH=09h"Digiboard",AH=10h"Digiboard"
--------S-1411-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - DISABLE PORT
        AH = 11h
        DX = port number
Return: AL = status
            00h successful
            01h IRQ for port is shared
            02h IRQ was reserved
SeeAlso: AH=04h"SERIAL",AH=05h"SERIAL",AH=12h"PC-MOS"
--------S-1412-------------------------------
INT 14 - FOSSIL - READ CURRENT CURSOR LOCATION
        AH = 12h
Return: DH = row
        DL = column
Note:   this is the same as INT 10/AH=03h
SeeAlso: AH=11h"FOSSIL"
--------S-1412-------------------------------
INT 14 - Digiboard DigiCHANNEL PC/X* - GET TRANSMIT BUFFER FREE SPACE
        AH = 12h
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AX = number of bytes free
SeeAlso: AH=0Ah"Digiboard",AH=14h"Digiboard"
--------S-1412-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - GET CURRENT PORT PARAMETERS
        AH = 12h
        DX = port number
Return: AH = status
            FFh port number invalid
        AL = line parameters (see #00304)
        AH = flow control configuration (see #00336 at AH=05h"PC-MOS")
        CX:BX = bps rate
        DL = XOFF character or 00h for none
        DH = XON character or 00h for none
--------S-1413-------------------------------
INT 14 - FOSSIL - SINGLE CHARACTER ANSI WRITE TO SCREEN
        AH = 13h
        AL = character
Return: nothing
Note:   should not be called if it is unsafe to call DOS
SeeAlso: AH=15h
--------S-1413-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - REGISTER A PORT WITH A TERMINAL
        AH = 13h
        DX = port number
Return: AH = status
            FFh port number invalid
            else
                ES:BX -> BYTE flag (00h buffer empty, FFh buffer contains data)
SeeAlso: AH=17h"PC-MOS"
--------S-1414-------------------------------
INT 14 - FOSSIL - ENABLE OR DISABLE WATCHDOG PROCESSING
        AH = 14h
        AL = 01h enable watchdog
             00h disable watchdog
        DX = port number
Return: nothing
SeeAlso: INT 21/AH=2Bh/CX=6269h"WDTSR"
--------S-1414-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - OUTPUT STRING
        AH = 14h
        CX = number of characters in string
        DX = port number
        ES:BX -> string to be sent
        SI = timeout in timer ticks or 0000h for default
Return: AX = number of bytes actually sent
        ZF clear if successful
        ZF set on timeout
SeeAlso: AH=01h,AH=15h"PC-MOS"
--------S-1414-------------------------------
INT 14 - Digiboard - GET NUMBER OF BOARDS INSTALLED
        AH = 14h
Return: AX = number of boards installed
SeeAlso: AH=08h"Digiboard",AH=15h"Digiboard"
--------S-1415-------------------------------
INT 14 - FOSSIL - WRITE CHARACTER TO SCREEN USING BIOS SUPPORT ROUTINES
        AH = 15h
        AL = character
Return: nothing
SeeAlso: AH=13h"FOSSIL"
--------S-1415-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - INPUT STRING
        AH = 15h
        CX = size of buffer
        DX = port number
        ES:BX -> buffer for received characters
        SI = timeout in clock ticks or 0000h for default
Return: AX = number of characters actually read
        ZF set on timeout (no data available)
SeeAlso: AH=02h,AH=14h"PC-MOS",AH=16h"PC-MOS"
--------S-1415-------------------------------
INT 14 - Digiboard - ENABLE/DISABLE MEMORY
        AH = 15h
        AL = new state (00h disabled, 01h enabled)
Return: AH = status
            00h successful
            80h error
            FFh error
SeeAlso: AH=14h"Digiboard",AH=16h"Digiboard"
--------S-1416-------------------------------
INT 14 - FOSSIL - INSERT/DELETE FUNCTION FROM TIMER TICK CHAIN
        AH = 16h
        AL = function
            00h = delete
            01h = add
        ES:DX -> routine to call
Return: AX = status
            0000h successful
            0001h unsuccessful
SeeAlso: AH=07h"FOSSIL"
--------S-1416-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - LINK TO ANOTHER SERIAL DRIVER
        AH = 16h
        ES:BX -> calling driver's INT 14 entry point
Return: nothing
Program: PC-MOS/386 v5.01 is a multitasking, multiuser MS-DOS 5.0-compatible
          operating system by The Software Link, Inc.
--------S-1416-------------------------------
INT 14 - Digiboard DigiCHANNEL PC/X* - CCB COMMAND
        AH = 16h
        AL = CCB command number (see #00342) (see also following entries)
        BL = byte 2
        BH = byte 3
        CL = byte 1 (for all channel functions except 4Eh and 4Fh)
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            80h error
            FFh error
SeeAlso: AX=1646h,AH=18h"Digiboard"

(Table 00342)
Values for Digiboard CCB command number:
 40h    Set Receive Mid Water Mark
 41h    Set Receive High Water Mark
 42h    Flush Receive Buffer
 43h    Flush Transmit Buffer
 44h    Transmit Pause
 45h    Transmit Resume
 46h    Set Interrupt to Host Mask
 47h    Set Baud, Data, Stop and Parity
 48h    Send Break
 49h    Set Modem Lines
 4Ah    Set Break Count
 4Bh    Set Handshake
 4Ch    Set Xon/Xoff Characters
 4Dh    Set Transmit Mid Water Mark
 4Eh    IRQ Polling Timer to Host
 4Fh    Buffer Set All
 50h    Port On
 51h    Port Off
 52h    Receive Pause
 53h    Special Character Interrupt
 54h    RS-422 Enable
--------S-141646-----------------------------
INT 14 - Digiboard - CCB COMMAND - SET INTERRUPT TO HOST MASK
        AX = 1646h
        BL = bits to set
        BH = bits to clear
        CL = byte 1
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            80h error
            FFh error
SeeAlso: AH=16h"Digiboard",AX=1647h
--------S-141647-----------------------------
INT 14 - Digiboard - CCB COMMAND - SET BAUD/DATABITS/STOPBITS/PARITY
        AX = 1647h
        BL = baud
        BH = datatype
        CL = byte 1
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            80h error
            FFh error
SeeAlso: AH=16h"Digiboard",AX=1646h,AX=1649h
--------S-141649-----------------------------
INT 14 - Digiboard - CCB COMMAND - SET MODEM LINES
        AX = 1649h
        BL = bits to set
        BH = bits to clear
        CL = byte 1
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            80h error
            FFh error
SeeAlso: AH=16h"Digiboard",AX=1647h
--------S-14164A-----------------------------
INT 14 - Digiboard - CCB COMMAND - SET BREAK COUNT
        AX = 164Ah
        BL = break count
        CL = byte 1
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            80h error
            FFh error
SeeAlso: AH=16h"Digiboard",AX=1649h,AX=164Bh
--------S-14164B-----------------------------
INT 14 - Digiboard - CCB COMMAND - SET HANDSHAKE
        AX = 164Bh
        BL = bits to set
        BH = bits to clear
        CL = byte 1
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            80h error
            FFh error
SeeAlso: AH=16h"Digiboard",AX=1649h,AX=164Ch
--------S-14164C-----------------------------
INT 14 - Digiboard - CCB COMMAND - SET XON/XOFF CHARACTERS
        AX = 164Ch
        BL = XON character
        BH = XOFF character
        CL = byte 1
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            80h error
            FFh error
SeeAlso: AH=16h"Digiboard",AX=164Bh,AX=164Dh
--------S-14164D-----------------------------
INT 14 - Digiboard - CCB COMMAND - SET TRANSMIT MID-WATER MARK
        AX = 164Dh
        BX = new mid-water mark
        CL = byte 1
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            80h error
            FFh error
SeeAlso: AH=16h"Digiboard",AX=164Ch,AX=164Eh,AX=164Fh
--------S-14164E-----------------------------
INT 14 - Digiboard - CCB COMMAND - IRQ POLLING TIMER TO HOST
        AX = 164Eh
        BL = ticks
        BH = ???
        CL = mode
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            80h error
            FFh error
SeeAlso: AH=16h"Digiboard",AX=164Dh
--------S-14164F-----------------------------
INT 14 - Digiboard - CCB COMMAND - BUFFER SET ALL
        AX = 164Fh
        BL = size
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            80h error
            FFh error
SeeAlso: AH=16h"Digiboard",AX=164Dh
--------S-141653-----------------------------
INT 14 - Digiboard - CCB COMMAND - SPECIAL CHARACTER INTERRUPT
        AX = 1653h
        BL = enable/disable
        BH = special character
        CL = byte 1
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            80h error
            FFh error
SeeAlso: AH=16h"Digiboard",AX=1646h
--------S-1417-------------------------------
INT 14 - FOSSIL - REBOOT SYSTEM
        AH = 17h
        AL = method
            00h = cold boot
            01h = warm boot
SeeAlso: INT 16/AX=E0FFh,INT 19,INT 60/DI=0606h
--------S-1417-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - WRITE MODEM CONTROL REGISTER
        AH = 17h
        AL = new value for UART's modem control register
        DX = port number
Return: nothing
--------S-1418-------------------------------
INT 14 - FOSSIL - READ BLOCK
        AH = 18h
        CX = maximum number of characters to transfer
        DX = port number
        ES:DI -> user buffer
Return: AX = number of characters transferred
SeeAlso: AH=19h"FOSSIL",AH=83h"COURIERS",AX=FF02h,INT 6B/AX=0100h
--------S-1418-------------------------------
INT 14 - Digiboard DigiCHANNEL PC/X* - SEND BIOS COMMAND
        AH = 18h
        ES:BX -> 16-byte command string
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            80h timeout
        AL = mailbox status
            00h no errors
            8Xh BIOS error
        ES:BX buffer filled in with mailbox string
        ZF clear if no errors
        ZF set if either status byte contains an error code
SeeAlso: AH=16h"Digiboard"
--------S-1418-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - GET DRIVER DESCRIPTION
        AH = 18h
        DX = port number
Return: DS:BX -> 40-byte buffer containing a string identifying the serial
                driver
SeeAlso: AH=06h"PC-MOS"
--------S-1419-------------------------------
INT 14 - FOSSIL - WRITE BLOCK
        AH = 19h
        CX = maximum number of characters to transfer
        DX = port number
        ES:DI -> user buffer
Return: AX = number of characters transferred
SeeAlso: AH=18h"FOSSIL",AH=86h,INT 6B/AX=0000h
--------S-1419-------------------------------
INT 14 - Digiboard DigiCHANNEL PC/X* - SPECIAL CHARACTER INTERRUPT
        AH = 19h
        BL = flag
            00h disable special character interrupt
            FFh enable interrupt
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
            00h successful
            FFh failed
SeeAlso: AH=1Ah"Digiboard"
--------S-1419-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - SELECTIVE BUFFER FLUSH
        AH = 19h
        AL = what to flush
            bit 0: input buffer
            bit 1: output buffer
        DX = port number
Return: nothing
SeeAlso: AH=09h"PC-MOS"
--------S-141A-------------------------------
INT 14 - FOSSIL - BREAK BEGIN OR END
        AH = 1Ah
        AL = 00h stop sending 'break'
             01h start sending 'break'
        DX = port number
Return: nothing
SeeAlso: AH=06h"FOSSIL",AH=8Ah,AH=FAh
--------S-141A-------------------------------
INT 14 - Digiboard DigiCHANNEL PC/X - SPECIAL CHARACTER FLAG/COUNTER
        AH = 1Ah
        BX = subfunction
            00h return pointer to special character flag byte
            01h return pointer to special character counter word
        DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: ES:BX -> special character flag or counter
Notes:  flag is FFh if one or more special characters are in the receive
          buffer; it is 00h and the counter is invalid if no special characters
          are in the receive buffer
        counter (if valid) contains the number of characters in the receive
          buffer up to and including the last-received special character
--------S-141B-------------------------------
INT 14 - FOSSIL - RETURN INFORMATION ABOUT THE DRIVER
        AH = 1Bh
        DX = port number
        CX = size of user buffer
        ES:DI -> user buffer for driver info (see #00343)
Return: AX = number of characters transferred
        CX = 3058h ("0X") (X00 FOSSIL only)
        DX = 2030h (" 0") (X00 FOSSIL only)

Format of FOSSIL driver info:
Offset  Size    Description     (Table 00343)
 00h    WORD    size of structure in bytes
 02h    BYTE    FOSSIL spec driver conforms to
 03h    BYTE    revision level of this specific driver
 04h    DWORD   pointer to ASCIZ identification string
 08h    WORD    size of the input buffer
 0Ah    WORD    number of bytes left in buffer
 0Ch    WORD    size of the output buffer
 0Eh    WORD    number of bytes left in buffer
 10h    BYTE    width of screen
 11h    BYTE    length of screen
 12h    BYTE    actual baud rate, computer to modem
--------S-141C-------------------------------
INT 14 - X00 FOSSIL - ACTIVATE PORT
        AH = 1Ch
        DX = port number
Return: AX = 1954h if successful
        BL = maximum function number supported (not including 7Eh and above)
        BH = revision of FOSSIL specification supported
Note:   this is a duplicate of AH=04h, so that AH=04h may be made compatible
          with the PS/2 BIOS in a future release
SeeAlso: AH=04h"FOSSIL",AH=1Dh
--------S-141D-------------------------------
INT 14 - X00 FOSSIL - DEACTIVATE PORT
        AH = 1Dh
        DX = port number
Return: none
Notes:  this is a duplicate of AH=05h, so that AH=05h may be made compatible
          with the PS/2 BIOS in a future release
        ignored if the port was never activated with AH=04h or AH=1Ch
SeeAlso: AH=05h"FOSSIL",AH=1Ch
--------S-141E-------------------------------
INT 14 - X00 FOSSIL - EXTENDED LINE CONTROL INITIALIZATION
        AH = 1Eh
        AL = break status
            00h if break
            01h if no break
        BH = parity (see #00344)
        BL = number of stop bits
            00h one stop bit
            01h two stop bits (1.5 if 5 bit word length)
        CH = word length (see #00345)
        CL = bps rate (see #00346)
        DX = port number
Return: AX = port status code (see #00304,#00305)
Notes:  this function is intended to exactly emulate the PS/2 BIOS AH=04h call
        if the port was locked at X00 load time, the appropriate parameters are
          ignored
SeeAlso: AH=00h,AH=04h"SERIAL"

(Table 00344)
Values for X00 FOSSIL parity:
 00h    no parity
 01h    odd parity
 02h    even parity
 03h    stick parity odd
 04h    stick parity even
SeeAlso: #00307,#00345,#00346

(Table 00345)
Values for X00 FOSSIL word length:
 00h    5 bits
 01h    6 bits
 02h    7 bits
 03h    8 bits
SeeAlso: #00308,#00344,#00346

(Table 00346)
Values for X00 FOSSIL bps rate:
 00h    110
 01h    150
 02h    300
 03h    600
 04h    1200
 05h    2400
 06h    4800
 07h    9600
 08h    19200
SeeAlso: #00309,#00344,#00345
--------S-141E------------------------------------
INT 14 - HUNTER 16 - READ COMMS PARAMETERS
        AH = 1Eh
        CX = channel number (00h COM1, 01h COM2, ...)
        DS:BX -> buffer for communications parameters (see #00347)
Return: DS:BX buffer filled
Note:   the Husky Hunter 16 is an 8088-based ruggedized laptop.  Other family
          members are the Husky Hunter, Husky Hunter 16/80, and Husky Hawk.
SeeAlso: AH=20h"HUNTER"

Format of HUNTER 16 communications parameters:
Offset  Size    Description     (Table 00347)
 00h    BYTE    communications type (00h IBM, nonzero Husky)
 01h    BYTE    port number (00h COM1, 01h COM2)
 02h    BYTE    baud rate (00h 110 bps, 01h 150, 02h 300, 03h 600, 04h 1200,
                  05h 2400, 06h 4800, 07h 9600, 08h 19200, 09h 38400)
 03h    BYTE    data bits (01h seven, 02h eight)
 04h    BYTE    parity (00h none, 01h odd, 02h even)
 05h    BYTE    stop bits (00h one, 01h two)
 06h    BYTE    handshake (see #00348)
 07h    BYTE    handshake protocol (00h none, 01h Xon/Xoff, 02h HWK3780)
 08h    BYTE    Nulls after CR (0-20)
 09h    BYTE    LF (00h off, 01h on)
 0Ah    BYTE    Serig. 0..7Fh: Ignore this character
                       80h: Serig off
 0Bh    BYTE    echo (00h off, 01h on)
 0Ch    BYTE    transmit timeout in seconds (1-60) or 00h to disable
 0Dh    BYTE    receive timeout in seconds (1-60) or 00h to disable
 0Eh  5 BYTEs   reserved

Bitfields for HUNTER 16 handshake:
Bit(s)  Description     (Table 00348)
 0-1    0: RTS off, 1: RTS hold, 2: RTS true
 2      DTR enabled
 4      CTS enabled
 5      DSR enabled
 6      DCD enabled
--------S-141F-------------------------------
INT 14 - X00 FOSSIL - EXTENDED SERIAL PORT STATUS/CONTROL
        AH = 1Fh
        DX = port number
        AL = direction
            00h read modem control register
                Return: BL = modem control register (see #00349)
                        AH = status
            01h write modem control register
                BL = modem control register (see #00349)
                Return: AX = status
Notes:  this function is intended to exactly emulate the PS/2 BIOS AH=05h call
        X00 forces BL bit 3 set (interrupts cannot be disabled)
SeeAlso: AH=00h,AH=05h"SERIAL"

Bitfields for X00 FOSSIL modem control register:
Bit(s)  Description     (Table 00349)
 0      data terminal ready
 1      request to send
 2      OUT1
 3      OUT2 (interrupts) enabled
 4      LOOP
 5-7    reserved
--------S-1420-------------------------------
INT 14 - X00 FOSSIL - DESTRUCTIVE READ WITH NO WAIT
        AH = 20h
        DX = port number
Return: AH = 00h if character was available
            AL = next character (removed from receive buffer)
        AX = FFFFh if no character available
SeeAlso: AH=0Ch,AH=21h"X00"
--------S-1420-------------------------------
INT 14 - Alloy MW386 - ATTACH LOGICAL COMMUNICATIONS PORT TO PHYSICAL PORT
        AH = 20h
        AL = logical port (01h COM1, 02h COM2)
        DX = physical port number
Return: AX = status
            0000h successful
            FFFFh failed
SeeAlso: AH=21h"Alloy",AH=22h"Alloy",AH=23h"Alloy",INT 17/AH=8Bh"Alloy"
--------S-1420-------------------------------
INT 14 - MultiDOS Plus - INITIALIZE PORT
        AH = 20h
        AL = port parameters (see #00300 at AH=00h"SERIAL")
        DX = port number (0-3)
Return: AH = status
            00h successful
            41h no such port
            64h monitor mode already active
SeeAlso: AH=00h"SERIAL",AH=04h"MultiDOS",AH=21h"MultiDOS",AH=23h"MultiDOS"
--------S-1420-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - CHECK OUTPUT QUEUE
        AH = 20h
        DX = port number
Return: AX = number of bytes in output buffer
SeeAlso: AH=0Ah"Digiboard"
--------S-1420------------------------------------
INT 14 - HUNTER 16 - SELECT COMMS PARAMETERS
        AH = 20h
        CX = channel number (00h COM1, 01h COM2, ...)
        DS:BX -> buffer with communications parameter (see #00347)
Return: AX = status
            0000h successful
            0001h invalid parameter
SeeAlso: AH=1Eh"HUNTER",AH=21h"HUNTER"
--------S-1421-------------------------------
INT 14 - X00 FOSSIL - STUFF RECEIVE BUFFER
        AH = 21h
        AL = character
        DX = port number
Return: nothing
Notes:  the given character is inserted at the end of the receive buffer as if
          it had just arrived from the serial port; all normal receive
          processing (XON/XOFF, ^C/^K) is performed on the character
        fully re-entrant
SeeAlso: AH=20h"X00"
--------S-1421-------------------------------
INT 14 - Alloy MW386 v1.x only - RELEASE PHYSICAL COMMUNICATIONS PORT
        AH = 21h
        DX = physical port number
Return: AX = status
            0000h successful
            FFFFh failed
SeeAlso: AH=20h"Alloy",AH=22h"Alloy"
--------S-1421-------------------------------
INT 14 - MultiDOS Plus - TRANSMIT CHARACTER
        AH = 21h
        AL = character to send
        DX = port number
Return: AH = status (see #00350)
Note:   monitor mode must have been turned on with AH=24h before calling
SeeAlso: AH=20h"MultiDOS",AH=22h"MultiDOS",AH=24h"MultiDOS"

(Table 00350)
Values for MultiDOS Plus status:
 00h    successful
 39h    no DSR or CTS
 3Ch    no DSR
 3Bh    no CTS
 41h    no such port
 42h    monitor mode not active
 97h    timed out
--------S-1421-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - OUTPUT CHARACTER, WITH TIMEOUT
        AH = 21h
        AL = char to send
        DX = port number
        SI = timeout in timer ticks (0000h = default)
Return: after character is sent or timeout expires
Program: PC-MOS/386 v5.01 is a multitasking, multiuser MS-DOS 5.0-compatible
          operating system by The Software Link, Inc.
SeeAlso: AH=01h,AH=0Eh"Digiboard",AH=22h"PC-MOS"
--------S-1421------------------------------------
INT 14 - HUNTER 16 - EXTENDED CONTROL
        AH = 21h
        AL = command
            01h force transmission of buffer
            02h clear transmit buffer
            03h clear receive buffer
        DX = port (00h COM1, 01h COM2)
Return: AH = extended status
Desc:   executes the command on the selected port
SeeAlso: AH=1Eh"HUNTER",AH=20h"HUNTER",AH=22h"HUNTER",AH=24h"HUNTER"
--------S-1422-------------------------------
INT 14 - Alloy MW386 v2+ - RELEASE LOGICAL COMMUNICATIONS PORT
        AH = 22h
        AL = logical port (01h COM1, 02h COM2)
Return: AX = status (0000h successful)
SeeAlso: AH=20h"Alloy",AH=21h"Alloy"
--------S-1422-------------------------------
INT 14 - MultiDOS Plus - RECEIVE CHARACTER
        AH = 22h
        DX = port number
Return: AH = status (see also AH=21h"MultiDOS")
            00h successful
                AL = character
            3Dh framing and parity error
            3Eh overrun error
            3Fh framing error
            40h parity error
            96h ring buffer overflow
Note:   if no character is available, this function waits until a character
          arrives or an implementation-dependent timeout elapses
SeeAlso: AH=20h"MultiDOS",AH=21h"MultiDOS",AH=27h
--------S-1422-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - RECEIVE CHARACTER, WITH TIMEOUT
        AH = 22h
        DX = port number
        SI = timeout in timer ticks (0000h = default)
Return: AH = port status (see also #00304 at AH=03h)
            bit 7 = 1 indicates time-out
        AL = character received
Program: PC-MOS/386 v5.01 is a multitasking, multiuser MS-DOS 5.0-compatible
          operating system by The Software Link, Inc.
SeeAlso: AH=02h,AH=0Fh"Digiboard",AH=21h"PC-MOS"
--------S-1422------------------------------------
INT 14 - HUNTER 16 - EXTENDED STATUS
        AH = 22h
        DX = port (00h COM1, 01h COM2)
Return: AH = extended status
        BX = number of characters in input buffer
        CX = number of characters in output buffer
Desc:   returns the most recent Extended Status code for the port
SeeAlso: AH=21h"HUNTER"
--------S-1423-------------------------------
INT 14 - Alloy MW386 v2+ - GET PORT NUMBER FROM LOGICAL PORT ID
        AH = 23h
        AL = logical port (01h COM1, 02h COM2)
        DH = user ID
        DL = process ID (DH,DL both FFh for current task)
Return: AL = MW386 port mode (see #00351)
        CX = MW386 port number
        DH = owner's user ID
        DL = owner's task ID
SeeAlso: AH=20h"Alloy",INT 17/AH=8Bh"Alloy"

Bitfields for MW386 port mode:
Bit(s)  Description     (Table 00351)
 0      port is shared (spooler only)
 1      port is spooled instead of direct (spooler only)
 2      port is assigned as logical COM device, not in spooler
 3      port is free
--------S-1423-------------------------------
INT 14 - MultiDOS Plus - GET PORT STATUS
        AH = 23h
        DX = port number
Return: AH = line status (see #00304 at AH=03h)
        AL = modem status (see #00305 at AH=03h)
SeeAlso: AH=03h,AH=07h"MultiDOS",AH=20h"MultiDOS"
--------S-1423-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - DECLARE PORT OWNERSHIP
        AH = 23h
        DX = port number
        BX = TCB segment/selector address of owner task
Return: nothing
SeeAlso: AH=0Dh"Digiboard",AH=21h"PC-MOS",AH=22h"PC-MOS"
--------S-1423------------------------------------
INT 14 - HUNTER 16 - CONTROL HANDSHAKE LINES
        AH = 23h
        BH = handshake line to set (00h RTS, 01h DTR)
        BL = new level (00h low, 01h high)
Return: nothing
Desc:   sets the handshake lines of COM1 to the desired level
SeeAlso: AH=21h"HUNTER",AH=24h"HUNTER"
--------S-1424-------------------------------
INT 14 - Alloy MW386 v2+ - CHANGE PHYSICAL PORT PARAMETERS
        AH = 24h
        CX = physical I/O port number
        DS:DX -> configuration table (see #00352)
Return: AH = 00h
Note:   invalid port numbers are merely ignored
SeeAlso: INT 17/AH=96h

Format of Alloy MW386 configuration table:
Offset  Size    Description     (Table 00352)
 00h    BYTE    baud rate (see #00353)
 01h    BYTE    data bits (00h=5, 01h=6, 02h=7, 03h=8)
 02h    BYTE    parity (00h none, 01h odd, 02h even)
 03h    BYTE    stop bits (00h=1, 01h=2)
 04h    BYTE    receive flow control
                00h none, 01h XON/XOFF, 02h DTR/DSR, 03h XPC, 04h RTS/CTS
 05h    BYTE    transmit flow control (as for receive)

(Table 00353)
Values for Alloy MW386 baud rate:
 00h    38400
 01h    19200
 02h    9600
 03h    7200
 04h    4800
 05h    3600
 06h    2400
 07h    2000
 08h    1200
 09h    600
 0Ah    300
 0Bh    150
 0Ch    134.5
SeeAlso: #00309
--------S-1424-------------------------------
INT 14 - MultiDOS Plus - SET MONITOR MODE
        AH = 24h
        AL = port status storage
            00h single status for entire receive buffer
            01h separate status kept for each byte in receive buffer
        DX = port number
Return: AH = status
            00h successful
            3Ah invalid status storage specified
            41h no such port
            64h monitor mode already active
Note:   in monitor mode, MultiDOS redirects all BIOS video output to a serial
          port
SeeAlso: AH=20h"MultiDOS",AH=25h
--------S-1424-------------------------------
INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - ???
        AH = 24h
Return: ???
Program: PC-MOS/386 v5.01 is a multitasking, multiuser MS-DOS 5.0-compatible
          operating system by The Software Link, Inc.
--------S-1424------------------------------------
INT 14 - HUNTER 16 - CONTROL CTS HANDSHAKING
        AH = 24h
        AL = new CTS handshake state for COM1 (00h disabled, 01h enabled)
Return: nothing
SeeAlso: AH=23h"HUNTER",AH=25h"HUNTER",AH=26h"HUNTER"
--------S-1425-------------------------------
INT 14 - MultiDOS Plus - CLEAR BUFFERS
        AH = 25h
        AL = function
            00h only clear buffers
            01h clear buffers and deactivate
        DX = port number
Return: AH = status
            00h successful
            3Ah invalid function
            41h no such port
            42h monitor mode not active
SeeAlso: AH=20h"MultiDOS",AH=24h"MultiDOS"
--------S-1425------------------------------------
INT 14 - HUNTER 16 - CONTROL RS232 DRIVERS
        AH = 25h
        AL = new state of RS232 drivers (00h off, 01h on)
Return: nothing
Note:   this function can be used to save power by turning off the RS232
          drivers.  It can also be used to turn on the RS232 drivers before
          connecting to a remote system to avoid "garbage" while the drivers
          turn on.
SeeAlso: AH=23h"HUNTER",AH=24h"HUNTER",AH=26h"HUNTER"
--------S-1426------------------------------------
INT 14 - HUNTER 16 - CONTROL RI POWER UP
        AH = 26h
        AL = 00h enable RI power up
            else disable RI power up
Return: nothing
Desc:   control whether the Ring Indicator handshake can power up the Hunter
--------S-1427-------------------------------
INT 14 - MultiDOS Plus - GET BUFFER CHARACTER COUNT
        AH = 27h
        DX = port number
Return: AH = status
            00h successful
            41h no such port
            42h monitor mode not active
        AL = number of characters in receive buffer
--------S-1427------------------------------------
INT 14 - HUNTER 16 - GET INSTALLED PROTOCOLS COUNT
        AH = 27h
        AL = number of extended protocols installed (since last call)
Return: AL = total number installed, including new ones
Desc:   Returns the number of extended communication protocols installed
SeeAlso: AH=25h"HUNTER",AH=28h"HUNTER"
--------S-1428------------------------------------
INT 14 - HUNTER 16 - GET PROTOCOL NAME
        AH = 28h
        AL = protocol handle
        DS:BX -> 8 character buffer for protocol name
Return: AH = status
            00h successful
                DS:BX buffer filled with the protocol name
            FFh failed
SeeAlso: AH=27h"HUNTER",AH=29h"HUNTER"
--------S-1429------------------------------------
INT 14 - HUNTER 16 - GET PROTOCOL HANDLE
        AH = 29h
        DS:BX -> buffer containing the protocol name
Return: AH = status
            00h successful
                AL = handle
            FFh failed
SeeAlso: AH=28h"HUNTER",AH=2Ah"HUNTER"
--------S-142A------------------------------------
INT 14 - HUNTER 16 - EXTENDED PROTOCOL MENU
        AH = 2Ah
        AL = protocol handle
Return: AH = status
            00h successful
            FFh failed
        AL = menu handle
SeeAlso: AH=29h"HUNTER",AH=2Bh"HUNTER"
--------S-142B------------------------------------
INT 14 - HUNTER 16 - GET EXTENDED PROTOCOL PARAMETERS
        AH = 2Bh
        AL = protocol handle
        DS:BX -> buffer for extended protocol parameters
Return: AH = status
            00h successful
                DS:BX buffer filled with extended parameters
            FFh failed
SeeAlso: AH=2Ah"HUNTER"
--------S-142C00----------------------------------
INT 14 - HUNTER 16 - GET DTR
        AX = 2C00h
Return: AH = 00h
        BL = current state
            00h  normal DTR operation
            else DTR is forced high
Desc:   Indicates whether the DTR signal on COM1 is forced high
Note:   the Husky Hunter 16 is an 8088-based ruggedized laptop.  Other family
          members are the Husky Hunter, Husky Hunter 16/80, and Husky Hawk.
SeeAlso: AH=2Ch"SET DTR"
--------S-142C------------------------------------
INT 14 - HUNTER 16 - SET DTR
        AH = 2Ch
        AL nonzero
        BL = new state
            00h  normal operation
            else force DTR high
Return: AH = 00h
Desc:   determine whether the DTR signal on COM1 should be forced high
SeeAlso: AX=2C00h
--------N-1436-------------------------------
INT 14 - ComShare - INSTALLATION CHECK
        AH = 36h
Return: AX = 4353h ('CS') if installed
            BX = bitmap of installed ports (bit 0: COM1 is gateway, etc.)
            CX reserved for future use
            WORD DX:[0100h] = ComShare version number
Program: The ComShare System is a modem-sharing program for NetBIOS and
          NetWare-based networks by NashaKala Corporation
Note:   ComShare supports the standard BIOS INT 14h calls with a slight
          change in the interpretation of speed values
          (see #00309 at AH=04h"SERIAL")
SeeAlso: AH=00h"SERIAL",AH=04h"SERIAL",AX=F4FFh
--------t-144000-----------------------------
INT 14 - I1541 - INSTALLATION CHECK
        AX = 4000h
Return: AX = 1541h if installed
            BH = I1541 major version (BCD)
            BL = I1541 minor version (BCD)
            CX = 0000h
--------t-144001-----------------------------
INT 14 - I1541 - TEST IF 1541 CABLE CONNECTED
        AX = 4001h
Return: CF clear if connected
            BL = LPT number where 1541 cable is connected (1..3)
        CF set if cable not connected
Desc:   scan all the LPT ports searching for the adapter cable
SeeAlso: AX=4000h
--------t-144002-----------------------------
INT 14 - I1541 - SELECT LPT PORT FOR OUTPUT
        AX = 4002h
        BL = LPT number (1..3)
Return: CF clear if successful
        CF set otherwise
Desc:   force the input output routines to work on the cable placed on LPT BL
SeeAlso: AX=4001h
--------t-144003-----------------------------
INT 14 - I1541 - RESET ALL DEVICES
        AX = 4003h
Return: nothing
Desc:   send a reset pulse of 100ms to all CBM devices
Note:   it is necessary to wait about 2 seconds after reset before executing
          other instructions
SeeAlso: AX=4000h,AX=4004h
--------t-144004-----------------------------
INT 14 - I1541 - SEND LISTEN SIGNAL
        AX = 4004h
        BH = device number (0..15)
Return: CF clear if successful
        CF set on error
            AL = error number (see #00354)
SeeAlso: AX=4005h,AX=4006h

(Table 00354)
Values for I1541 error number:
 00h    device not present
 01h    listener not ready
 02h    missing EOI time-out
 03h    EOI not completed
 04h    data not released
 05h    frame error
--------t-144005-----------------------------
INT 14 - I1541 - SEND SECONDARY ADDRESS FOR LISTEN
        AX = 4005h
        BL = channel number and mode (see #00355)
Return: CF clear if successful
        CF set on error
            AL = error number (see #00354)
SeeAlso: AX=4004h,AX=4006h

Bitfields for I1541 channel number and mode:
Bit(s)  Description     (Table 00355)
 7-4    mode
        0110 read/write
        1110 close channel
        1111 open channel
 3-0    channel number
--------t-144006-----------------------------
INT 14 - I1541 - SEND UNLISTEN SIGNAL
        AX = 4006h
Return: CF clear if successful
        CF set on error
            AL = error number (see #00354)
SeeAlso: AX=4004h,AX=4005h
--------t-144007-----------------------------
INT 14 - I1541 - SEND TALK SIGNAL
        AX = 4007h
        BH = device number (0-15)
Return: CF clear if successful
        CF set on error
            AL = error number (see #00354)
SeeAlso: AX=4008h,AX=4009h
--------t-144008-----------------------------
INT 14 - I1541 - SEND SECONDARY ADDRESS FOR TALK
        AX = 4008h
        BL = channel number and mode (see #00355)
Return: CF clear if successful
        CF set on error
            AL = error number (see also #00354)
                40h turn around time-out
SeeAlso: AX=4007h,AX=4009h
--------t-144009-----------------------------
INT 14 - I1541 - SEND UNTALK SIGNAL
        AX = 4009h
Return: CF clear if successful
        CF set on error
           AL = error number (see #00354)
SeeAlso: AX=4007h,AX=4008h
--------t-14400A-----------------------------
INT 14 - I1541 - SEND A BYTE TO A DEVICE
        AX = 400Ah
        BL = byte to send
        CL = last-byte flag
            00h more bytes follow
            01h this is the last byte to be sent
Return: CF clear if successful
        CF set on error
            AL = error number (see #00354)
SeeAlso: AX=4000h,AX=400Bh
--------t-14400B-----------------------------
INT 14 - I1541 - RECEIVE A BYTE FROM A DEVICE
        AX = 400Bh
Return: CF clear if successful
            AL = byte received
            CL = last-byte flag
                00h more bytes to follow
                01h received byte is the last
        CF set on error
            AL = error number
                80h EOI response required
                81h talker not ready
                82h clock not set
                83h clock not released
            CL = 00h
SeeAlso: AX=4000h,AX=400Ah
--------t-14400C-----------------------------
INT 14 - I1541 - WAIT
        AX = 400Ch
        CX = number of 838ns microticks to wait (0000h means 65536, ~55ms)
Return: after wait period elapses
SeeAlso: AX=4000h,AX=400Dh
--------t-14400D-----------------------------
INT 14 - I1541 - LONGWAIT
        AX = 400Dh
        DX:CX = number of 838ns microticks to wait
             (0000h:0000h means 4294967296, about one hour)
Example: To wait 1s you must set DX:CX=(1s/838ns)=1193180
SeeAlso: AX=4000h,AX=400Ch
--------t-14400E-----------------------------
INT 14 - I1541 - GET INFO
        AX = 400Eh
Return: AX = LPT port I/O address in use (0000h if no cable in use)
        BL = LPT number (1..3) in use (00h if no cable in use)
        CF set if the cable is auto-detectable
        CF clear if cable could not be auto-detected or is not present
SeeAlso: AX=4000h
--------S-1456-------------------------------
INT 14 U - BWCOM14 - INSTALLATION CHECK
        AH = 56h
Return: CX = 0001h if installed
Program: BWCOM14 is a network serial port emulator (simulating a Hayes modem
          connected to the serial port) distributed as part of the
          Beame&Whiteside BW-NFS package
SeeAlso: AH=57h,AH=58h,INT 2F/AX=DF00h/BX=5445h
--------S-1457-------------------------------
INT 14 U - BWCOM14 - INITIALIZE
        AH = 57h
        DL = port number
Return: AL = initialization status (00h successful, 01h already initialized)
        CX = port status (0001h port redirected, 0002h and FFFFh failed)
Note:   after this call, all invocations of INT 14/AH=00h-03h for the specified
          port will be handled by BWCOM14 until AH=58h is called
SeeAlso: AH=00h"SERIAL",AH=56h,AH=58h
--------S-1458-------------------------------
INT 14 U - BWCOM14 - SHUTDOWN
        AH = 58h
Return: CX = status (0001h successful, 0002h not initialized)
Note:   after this call, BWCOM14 will no longer redirect the COM port
SeeAlso: AH=56h,AH=57h
--------N-146F--BXFFFE-----------------------
INT 14 U - Connection Manager - ???
        AH = 6Fh
        BX = FFFEh
        ???
Return: ???
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
          serial ports over an IPX or NetBIOS-based network
--------N-146F--BXFFFF-----------------------
INT 14 - Connection Manager - INSTALLATION CHECK
        AH = 6Fh
        BX = FFFFh
Return: DX:BX -> Connection Manager Communication Table if installed
        BX = FFFFh if not installed
SeeAlso: AH=0Dh/DX=FFFFh
--------S-146F00-----------------------------
INT 14 - HP Vectra EX-BIOS - "F14_INQUIRE" - INSTALLATION CHECK
        AX = 6F00h
        BX <> 4850h (usually set to 0000h for simplicity)
Return: BX = 4850h ("HP") if HP Extended BIOS serial port extensions available
        AX destroyed
Note:   supported by original HP Vectra AT and by ES/QS/RS series Vectras
SeeAlso: AX=6F01h,AX=6F02h,AX=6F03h,AX=6F04h,INT 10/AX=6F00h,INT 14/AX=6F00h
SeeAlso: INT 17/AX=6F00h,INT 33/AX=6F00h
--------S-146F01-----------------------------
INT 14 - HP Vectra EX-BIOS - "F14_EXINIT" - INITIALIZE SERIAL PORT
        AX = 6F01h
        BX = port attributes (see #00356)
        DX = port number (0-3)
Return: AH = line status (see #00304)
        AL = modem status (see #00305)
Note:   supported by original HP Vectra AT and by ES/QS/RS series Vectras
SeeAlso: AX=6F00h

Bitfields for HP Vectra Extended BIOS serial port attributes:
Bit(s)  Description     (Table 00356)
 8-5    data rate (110, 150, 300, 600, 1200, 2400, 4800, 9600, 19200)
 4-3    parity
        00 none
        01 odd
        10 none
        11 even
 2      stop bits (0 = one, 1 = two)
 1-0    bits per character
        10 seven-bit characters
        11 eight-bit characters
        0x undefined
--------S-146F02-----------------------------
INT 14 - HP Vectra EX-BIOS - "F14_PUT_BUFFER" - TRANSMIT BUFFER
        AX = 6F02h
        CX = number of characters in buffer
        DX = port number (0-3)
        ES:DI -> buffer containing characters
Return: AH = line status (see #00304)
        AL = modem status (see #00305)
        CX = number of bytes actually sent
        ES:DI -> next byte to be transferred (unchanged if all bytes sent)
Desc:   send characters from the specified buffer until all characters have
          been sent or an error/timeout is encountered
Note:   supported by original HP Vectra AT and by ES/QS/RS series Vectras
SeeAlso: AX=6F00h,AX=6F03h,AX=6F04h,INT 17/AX=6F02h
--------S-146F03-----------------------------
INT 14 - HP Vectra EX-BIOS - "F14_GET_BUFFER" - READ DATA INTO BUFFER
        AX = 6F03h
        CX = size of buffer
        DX = port number (0-3)
        ES:DI -> buffer for received characters
Return: AH = line status (see #00304)
        ---on error (AH bit 7 set)---
           AL = 00h
           ES:DI -> next byte to be transferred
        ---if successful---
           AL = last byte read
           ES:DI unchanged
        CX = number of bytes read
Desc:   read characters into the specified buffer until the buffer is filled
          or a timeout occurs
Notes:  supported by original HP Vectra AT and by ES/QS/RS series Vectras
        polls the Data Set Ready modem status and Data Ready line status bits
          to determine when characters are available
SeeAlso: AX=6F00h,AX=6F02h,AX=6F04h
--------S-146F04-----------------------------
INT 14 - HP Vectra EX-BIOS - "F14_TRM_BUFFER" - READ UNTIL TERMINATOR
        AX = 6F04h
        BL = lowest termination character
        BH = highest termination character
        CX = size of buffer
        DX = port number (0-3)
        ES:DI -> buffer for received characters
Return: AH = line status (see #00304)
        ---on error (AH bit 7 set)---
           AL = 00h
           ES:DI -> next byte to be transferred
        ---if successful---
           AL = last byte read
           ES:DI unchanged
        CX = number of bytes read
Desc:   read characters into the specified buffer until the buffer is filled,
          a character in the specified range is received, or a timeout occurs
Notes:  supported by original HP Vectra AT and by ES/QS/RS series Vectras
        polls the Data Set Ready modem status and Data Ready line status bits
          to determine when characters are available
SeeAlso: AX=6F00h,AX=6F02h,AX=6F03h
--------U-147000-----------------------------
INT 14 - NEWCOM - INSTALLATION CHECK
        AX = 7000h
Return: AX = 4E43h ('NC') if installed
        BX = 4F4Dh ('OM') if installed
            CH = major version number
            CL = minor version number
            DH = patch level
            DL = language (currently: 00h English, 01h French)
Program: Newcom is a DOS commandline-enhancer by kilobug@kali.isicom.fr
SeeAlso: INT 2F/AX=D44Dh
--------S-147E-------------------------------
INT 14 - FOSSIL - INSTALL AN EXTERNAL APPLICATION FUNCTION
        AH = 7Eh
        AL = code assigned to external application (80h-BFh)
            80h reserved for communications FOSSIL
            81h video FOSSIL
            82h reserved for keyboard FOSSIL
            83h reserved for system FOSSIL
        ES:DX -> entry point
Return: AX = 1954h
        BL = code assigned to application (same as input AL)
        DH = status
            00h failed
            01h successful
SeeAlso: AH=7Fh,AH=80h"FOSSIL",AX=8100h,AH=82h"FOSSIL",AH=83h"FOSSIL"
--------S-147F-------------------------------
INT 14 - FOSSIL - REMOVE AN EXTERNAL APPLICATION FUNCTION
        AH = 7Fh
        AL = code assigned to external application
        ES:DX -> entry point
Return: AX = 1954h
        BL = code assigned to application (same as input AL)
        DH = status
            00h failed
            01h successful
SeeAlso: AH=7Eh
--------S-1480-------------------------------
INT 14 - COMMUNICATIONS FOSSIL
        AH = 80h
SeeAlso: AH=7Eh
--------S-1480-------------------------------
INT 14 - COURIERS.COM - INSTALLATION CHECK
        AH = 80h
Return: AH = E8h if loaded
Program: COURIERS is a TSR utility by PC Magazine
--------S-148000-----------------------------
INT 14 - ARTICOM - INSTALLATION CHECK
        AX = 8000h
Return: AL = FFh if installed
            BH = major version
            BL = minor version
Program: ArtiCom is an asynchronous communications driver by Artisoft which
          works on top of NetBIOS and allows modem/serial-port sharing by
          programs using INT 14 for serial I/O.
Note:   ArtiCom supports 32 simultaneous COM ports using multiport cards and
          drivers
SeeAlso: AH=00h"SERIAL",AH=01h,AH=02h,AH=03h,AH=04h"SERIAL",AH=05h"SERIAL"
SeeAlso: AX=8001h,AX=8002h
--------S-148000-----------------------------
INT 14 - COMM-DRV v14.0 - READ PORT METRICS - GET ERROR CODE AND BUFFER STATUS
        AX = 8000h
        DX = port number
Return: AX = code for last error (see #00357)
        BX = number of characters in output buffer
        CX = nubmer of characters in input buffer
        DX = state flag (see #00358)
Program: COMM-DRV is a universal serial communications driver by Willies'
          Computer Software Company, which supports standard INT 14 and
          FOSSIL calls as well as its own interfaces
SeeAlso: AX=8001h"COMM-DRV",AX=8002h"COMM-DRV",AX=8003h"COMM-DRV"

(Table 00357)
Values for COMM-DRV error code:
 00h    no error
 01h    buffer not set or attempted to change buffer for active port
 02h    port not active
 03h    transmit buffer full
 04h    receive buffer full
 05h    syntax error
 06h    invalid buffer size
 07h    invalid port
 08h    handler changed
 09h    invalid baud rate
 0Ah    invalid parity setting
 0Bh    invalid data length
 0Ch    invalid number of stop bits
 0Dh    invalid protocol number
 0Eh    IRQ changed
 0Fh    port changged
 10h    invalid threshold setting
 11h    invalid IRQ number
 12h    interrupts not enabled
 13h    invalid break syntax
 14h    fatal error
 15h    CTS error
 16h    invalid RS232 I/O port address
 17h    environment variable not set
 18h    error on IOCTL call
 19h    error during atexit cleanup
 1Ah    error mapping for direct calls
 1Bh    error opening device
 1Ch    unable to allocate memory
 1Dh    error on external micro card
 1Eh    card changed error
 1Fh    card type error
 20h    not supported
 21h    parent port error
 22h    card command buffer full
 23h    no subdevice for this port
 24h    unknown error
 25h    external card busy
 26h    no more timers available
 27h    INT 14 vector changed
 28h    INT 08 vector changed
 29h    DPMI error
 2Ah    TSR buffer too small (or nonexistent)
 2Bh    out of asynchronous resources
 2Ch    out of timer resources
 2Dh    out of "other" timer resources
 2Eh    file I/O error
 2Fh    hardware memory > 64K

Bitfields for state flag :
Bit(s)  Description     (Table 00358)
 0      port is active
 1      output throttled (XOFF received, or DSR or CTS reset)
 2      input throttled (XOFF sent, or DTR or RTS reset)
--------S-148001-----------------------------
INT 14 - ARTICOM - UNLOAD ASYNCHRONOUS REDIRECTOR FROM MEMORY
        AX = 8001h
Return: AX = error code, if error (see #00360)
SeeAlso: AX=8000h"ARTICOM",AX=8002h"ARTICOM",AX=8003h"ARTICOM"
Index:  uninstall;ARTICOM
--------S-148001-----------------------------
INT 14 - COMM-DRV v14.0 - READ PORT METRICS - GET PORT PARAMETERS
        AX = 8001h
        DX = port number
Return: BX:DI -> Port Control Block (see #00367)
SeeAlso: AX=8000h"COMM-DRV",AX=8002h"COMM-DRV",AX=8003h"COMM-DRV"
--------S-148002-----------------------------
INT 14 - ARTICOM - GET ASYNCHRONOUS REDIRECTOR STATUS
        AX = 8002h
        ES:DI -> buffer for redirector status structure (see #00359)
Return: AX = error code, if error (see #00360)
SeeAlso: AX=8000h"ARTICOM",AX=8003h"ARTICOM"

Format of ARTICOM redirector status:
Offset  Size    Description     (Table 00359)
 00h    WORD    redirector major and minor version numbers
 02h    WORD    redirectable ports found
 04h    WORD    redirectable ports + local ports found
 06h    WORD    redirector internal buffer size
 08h    WORD    maximum servers maintained
 0Ah    WORD    number of adapters found
--------S-148002-----------------------------
INT 14 - COMM-DRV v14.0 - READ PORT METRICS - GET PORT PARAMETERS
        AX = 8002h
        DX = port number
Return: AH bit 7 set on error
        AH bit 7 clear if successful
            BX:DI -> Port Control Block (see #00367) (modifyable portion only)
SeeAlso: AX=8000h"COMM-DRV",AX=8001h"COMM-DRV",AX=8003h"COMM-DRV"
--------S-148003-----------------------------
INT 14 - ARTICOM - TRANSLATE ERROR CODE TO ERROR STRING
        AX = 8003h
        CX = error number to translate (see #00360)
Return: ES:DI -> ASCIZ error text or 0000h:0000h if unable to translate
SeeAlso: AX=8000h

(Table 00360)
Values for ARTICOM error codes:
 00h    "No error"
 01h    "An invalid port number was specified"
 02h    "Port is already redirected"
 03h    "Too many ports redirected"
 04h    "Cannot locate the server"
 05h    "Server is busy"
 06h    "Access denied"
 07h    "Resource in use"
 08h    "Resource in use - request queued"
 09h    "No such resource"
 0Ah    "Invalid username/password pair"
 0Bh    "Noncompatible version number"
 0Ch    "Can't remove from memory"
 0Dh    "Bad NETBIOS adapter number"
 0Eh    "No more entries in list"
 0Fh    "Resource is not available at this time"
 10h    "Invalid value to INT 14 call"
--------S-148003-----------------------------
INT 14 - COMM-DRV v14.0 - READ PORT METRICS - GET I/O BUFFER SIZES
        AX = 8003h
        DX = port number
Return: AX = number of characters in input buffer
        BX = input buffer size
        CX = number of characters in output buffer
        DX = output buffer size
SeeAlso: AX=8000h"COMM-DRV",AX=8001h"COMM-DRV",AX=8002h"COMM-DRV"
--------S-148004-----------------------------
INT 14 - ARTICOM - ATTACH ASYNCHRONOUS RESOURCE
        AX = 8004h
        DX = port to redirect (COM1=0, COM2=1, ...)
        CH = attach type
        CL = adapter to use for attach, 0FFh to search all
        ES:DI -> attachment structure (see #00361)
Return: AX = error code, if error (see #00360)
Note:   The wildcard '*' is supported in the server and resource fields.  If
          wild cards are used then the first matching available server is
          attached.
SeeAlso: AX=8000h,AX=8003h,AX=8005h

Format of ARTICOM attachment structure:
Offset  Size    Description     (Table 00361)
 00h 16 BYTEs   server to look for attach
 10h 16 BYTEs   attach to resource name
 20h 16 BYTEs   username for attach
 30h 16 BYTEs   password for username or resource
 40h    BYTE    attach type
                00h normal
                01h queue if resource is in use (not yet supported in v1.00)
--------S-148005-----------------------------
INT 14 - ARTICOM - DETACH ASYNCHRONOUS RESOURCE
        AX = 8005h
        DX = port to detach (COM1=0, COM2=1, ...)
Return: AX = error code, if error (see #00360)
Note:   only a previously attached resource can be detached
SeeAlso: AX=8000h,AX=8003h,AX=8004h
--------S-148006-----------------------------
INT 14 - ARTICOM - GET RESOURCE INFORMATION
        AX = 8006h
        BX = remote port (COM1=0, COM2=1, ...)
        CL = adapter number, FFh to try all adapters
        ES:DI -> resource information structure (see #00362)
        DS:SI -> 16 byte server name. See note.
Return: AX = error code, if error (see #00360)
        BX = next remote port, recall to get next resource info
Note:   Wild cards supported in both the resource field and server name
          string DS:SI. If wild cards used then first matching available
          resource information is searched. Set the resource field to FFh to
          return all resources.
SeeAlso: AX=8000h,AX=8002h,AX=8003h,AX=8007h

Format of ARTICOM resource information structure:
Offset  Size    Description     (Table 00362)
 00h    BYTE    00h = free, else used
 01h 16 BYTEs   resource name
 11h 16 BYTEs   username of resource user
 21h    WORD    amount of time used
 23h    WORD    amount of time remaining
 53h 48 BYTEs   description of resource
 93h 64 BYTEs   initialization string for modem
 B3h 32 BYTEs   dial string for modem
 D3h 32 BYTEs   hang-up string for modem
--------S-148007-----------------------------
INT 14 - ARTICOM - GET REDIRECTED PORT INFORMATION
        AX = 8007h
        DX = port index (COM1=0, COM2=1, ...)
        ES:DI -> buffer for port information structure (see #00363)
Return: CF clear if redirection info returned and port is redirected
        CF set if not a redirected port
        AX = error code, if error (see #00360)
SeeAlso: AX=8000h,AX=8003h,AX=8006h,AX=8008h

Format of ARTICOM port information structure:
Offset  Size    Description     (Table 00363)
 00h 16 BYTEs   server name resource is on
 10h    BYTE    adapter number server is on
 11h 16 BYTEs   resource name
 21h    WORD    remote port index, use to get additional information
 23h    WORD    buffer size
 25h    WORD    baud rate (see #00364)
 26h    BYTE    modem status register
 27h    BYTE    modem control register
 28h    BYTE    line status register
 29h    BYTE    line control register
 2Ah    BYTE    flow control in use: 0 - NONE, 1 - XON/XOFF, 2 - RTS/CTS
 2Bh    WORD    send timeout in ticks
 2Dh    WORD    receive timeout in ticks
 2Fh    WORD    time used on remote port
 31h    WORD    time left before timeout
 33h    BYTE    if server changes allowed?
 34h    WORD    FFFFh (-1) if connection ok, else old port index

(Table 00364)
Values for ARTICOM baud rate:
 00h    110
 01h    150
 02h    300
 03h    600
 04h    1200
 05h    2400
 06h    4800
 07h    9600
 08h    19200
 09h    38400
 0Ah    57600
 0Bh    115200
 0Ch    134.5
 0Dh    1800
 0Eh    2000
 0Fh    3600
 10h    7200
SeeAlso: #00309
--------S-148008-----------------------------
INT 14 - ARTICOM - GET AVAILABLE SERVER NAME
        AX = 8008h
        BX = server index (0,1,...)
        ES:DI -> server name structure (see #00365)
Return: AX = error code, if error (see #00360)
        BX = next remote port, repeat call to get next available server
Note:   the wildcard '*' is supported in the server name field.  Set the
          server name to FFh to search for all servers.
SeeAlso: AX=8000h,AX=8003h,AX=8007h

Format of ARTICOM server name structure:
Offset   Size     Description   (Table 00365)
  00h 16 BYTEs    (call) ASCIZ server name
  10h    BYTE     (ret) the adapter server is found
--------S-148009-----------------------------
INT 14 - ARTICOM - SET SEND AND RECEIVE TIMEOUTS
        AX = 8009h
        BX = send timeout in ticks
        CX = receive timeout in ticks
        DX = port index (COM1=0, COM2=1, ...)
Return: nothing
SeeAlso: AX=8000h,AX=800Ah
--------S-14800A-----------------------------
INT 14 - ARTICOM - MODIFY FLOW CONTROL
        AX = 800Ah
        BL = flow control type (00h none, 01h XON/XOFF, 02h RTS/CTS)
        DX = port index (COM1=0, COM2=1, ...)
Return: AX = error code, if error (see #00360)
Note:   for attached ports only!
SeeAlso: AX=8000h,AX=8003h,AX=8009h
--------S-148025-----------------------------
INT 14 - ARTICOM - SET INTERNAL SEND/RECEIVE VECTOR
        AX = 8025h
        DS:DX -> address of trap function (see #00366) to call on read/write
Return: nothing
Note:   setting the vector to a user function allows the redirector's activity
          to be monitored.
SeeAlso: AX=8000h,AX=8035h,INT 21/AH=25h

(Table 00366)
Values ARTICOM trap function is called with:
        AH = operation
            80h reading character
            81h writing character
        AL = character
Return: AX must be preserved
        far JUMP to old trap function (see AX=8035h)
--------S-148035-----------------------------
INT 14 - ARTICOM - GET INTERNAL SEND/RECEIVE VECTOR
        AX = 8035h
Return: ES:BX -> address of current send/receive routine
Note:   this function returns the address of the routine which is called
          inside A-REDIR.EXE each time a character is received or sent on the
          active COM port.
SeeAlso: AX=8000h,AX=8025h,INT 21/AH=35h
--------S-1481-------------------------------
INT 14 - COURIERS.COM - CHECK IF PORT BUSY
        AH = 81h
        AL = port number (1-4)
Return: AH = status
            00h port available
            01h port exists but already in use
            02h port nonexistent
Program: COURIERS is a TSR utility by PC Magazine
SeeAlso: AH=83h,AH=8Dh
--------S-1481-------------------------------
INT 14 - COMM-DRV - EXTENDED INITIALIZATION
        AH = 81h
        BX:DI -> port control block (see #00367)
        DX = port number
Return: AH = line status register (see #00304)
            error if bit 7 set
        AL = modem status register (see #00305)
Program: COMM-DRV is a universal serial communications driver by Willies'
          Computer Software Company, which supports standard INT 14 and
          FOSSIL calls as well as its own interfaces
Note:   AX=8001h should be called first to fill in the port control block
SeeAlso: AH=00h,AX=8001h,AH=82h"COMM-DRV",AH=86h"COMM-DRV"

Format of COMM-DRV port control block:
Offset  Type    Description     (Table 00367)
 00h    WORD    port IO address
 02h    WORD    port IRQ
 04h    WORD    baud rate
 06h    WORD    parity
 08h    WORD    data bits
 0Ah    WORD    stop bits
 0Ch    WORD    break status (0000h off)
 0Eh    WORD    flow control protocol
 10h    BYTE    input block
 11h    BYTE    output block
 12h    WORD    low threshold
 14h    WORD    high threshold
 16h    WORD    segment of buffer
 18h    WORD    offset of buffer
 1Ah    WORD    input buffer length
 1Ch    WORD    output buffer length
 1Eh    BYTE    auxiliary address
 1Fh    BYTE    spare
 20h  4 WORDs   spares
--------V-148100-----------------------------
INT 14 - VIDEO FOSSIL - RETURN VFOSSIL INFORMATION
        AX = 8100h
        ES:DI -> buffer for VFOSSIL information (see #00368)
Return: AX = 1954h if installed
SeeAlso: AH=7Eh,AX=8101h

Format of VFOSSIL information:
Offset  Size    Description     (Table 00368)
 00h    WORD    size of information in bytes, including this field
 02h    WORD    VFOSSIL major version
 04h    WORD    VFOSSIL revision level
 06h    WORD    highest VFOSSIL application function supported
--------V-148101-----------------------------
INT 14 - VIDEO FOSSIL - OPEN VFOSSIL
        AX = 8101h
        ES:DI -> buffer for application function table (see #00369)
        CX = length of buffer in bytes
Return: AX = 1954h if installed
            BH = highest VFOSSIL application function supported
Note:   the number of initialized pointers in the application function table
          will never exceed CX/4; if the buffer is large enough, BH+1 pointers
          will be initialized
SeeAlso: AX=8102h

Format of VFOSSIL application function table:
Offset  Size    Description     (Table 00369)
 00h    DWORD   -> function to query current video mode (VioGetMode)(see #00374)
 04h    DWORD   -> function to set video mode (VioSetMode) (see #00375)
 08h    DWORD   -> function to query hardware config (VioGetConfig) (see #00376)
 0Ch    DWORD   -> function to write data in TTY mode (VioWrtTTY) (see #00377)
 10h    DWORD   -> function to get current ANSI state (VioGetANSI) (see #00378)
 14h    DWORD   -> function to set new ANSI state (VioSetANSI) (see #00379)
 18h    DWORD   -> function to get curr cursor position (VioGetCurPos)
                  (see #00380)
 1Ch    DWORD   -> function to set cursor position (VioSetCurPos) (see #00381)
 20h    DWORD   -> function to get cursor shape (VioGetCurType) (see #00382)
 24h    DWORD   -> function to set cursor shape (VioSetCurType) (see #00383)
 28h    DWORD   -> function to scroll screen up (VioScrollUp) (see #00384)
 2Ch    DWORD   -> function to scroll screen down (VioScrollDn) (see #00385)
 30h    DWORD   -> function to read cell string from screen (VioReadCellStr)
                  (see #00386)
 34h    DWORD   -> function to read char string from screen (VioReadCharStr)
                  (see #00387)
 38h    DWORD   -> function to write a cell string (VioWrtCellStr)
                  (see #00388)
 3Ch    DWORD   -> function to write char string, leaving attr (VioWrtCharStr)
                  (see #00389)
 40h    DWORD   -> function to write char string,const attr (VioWrtCharStrAttr)
                  (see #00390)
 44h    DWORD   -> function to replicate an attribute (VioWrtNAttr)
                  (see #00391)
 48h    DWORD   -> function to replicate a cell (VioWrtNCell)
                  (see #00392)
 4Ch    DWORD   -> function to replicate a character (VioWrtNChar)
                  (see #00393)

Format of VFOSSIL video mode data structure:
Offset  Size    Description     (Table 00370)
 00h    WORD    length of structure including this field
 02h    BYTE    mode characteristics
                bit 0: clear if MDA, set otherwise
                bit 1: graphics mode
                bit 2: color disabled (black-and-white)
 03h    BYTE    number of colors supported (1=2 colors, 4=16 colors, etc)
 04h    WORD    number of text columns
 06h    WORD    number of text rows
 08h    WORD    reserved
 0Ah    WORD    reserved
 0Ch    DWORD   reserved
SeeAlso: #00374,#00375

Format of VFOSSIL video configuration data:
Offset  Size    Description     (Table 00371)
 00h    WORD    structure length including this field
 02h    WORD    adapter type
                00h monochrome/printer
                01h CGA
                02h EGA
                03h VGA
                07h 8514/A
 04h    WORD    display type
                00h monochrome
                01h color
                02h enhanced color
                09h 8514
 06h    DWORD   adapter memory size
SeeAlso: #00376

Format of VFOSSIL cursor type record:
Offset  Size    Description     (Table 00372)
 00h    WORD    cursor start line
 02h    WORD    cursor end line
 04h    WORD    cursor width (always 01h)
 06h    WORD    cursor attribute (FFFFh = hidden)

(Table 00373)
Values for VFOSSIL error code:
 0000h  successful
 0074h  internal VIO failure
 0163h  unsupported mode
 0166h  invalid row value
 0167h  invalid column value
 017Eh  buffer too small
 01A5h  invalid VIO parameter
 01B4h  invalid VIO handle

(Table 00374)
Call VioGetMode with:
        STACK:  WORD    VIO handle (must be 00h)
                DWORD   pointer to video mode data structure (see #00370)
Return: AX = error code (00h, 74h, 17Eh, 1B4h) (see #00373)
SeeAlso: #00375

(Table 00375)
Call VioSetMode with:
        STACK:  WORD    VIO handle (must be 00h)
                DWORD   pointer to video mode data structure (see #00370)
Return: AX = error code (00h, 74h, 163h, 17Eh, 1A5h, 1B4h) (see #00373)
SeeAlso: #00374

(Table 00376)
Call VioGetConfig with:
        STACK:  WORD    VIO handle (must be 00h)
                DWORD   pointer to video configuration data buffer (see #00371)
Return: AX = error code (00h, 74h, 17Eh, 1B4h) (see #00373)

(Table 00377)
Call VioWrtTTY with:
        STACK:  WORD    VIO handle (must be 00h)
                WORD    length of string
                DWORD   pointer to character string to be written to screen
Return: AX = error code (00h, 74h, 1B4h) (see #00373)
Notes:  write wraps at end of line and terminates if it reaches end of screen
        in ANSI mode, ANSI control sequences are interpreted, and this func is
          not required to be reentrant; in non-ANSI mode, the function is
          reentrant and may be called from within an MS-DOS function call

(Table 00378)
Call VioGetANSI with:
        STACK:  WORD    VIO handle (must be 00h)
                DWORD   pointer to WORD which will be set to 00h if ANSI is off
                        or 01h if ANSI is on
Return: AX = error code (00h, 74h, 1B4h) (see #00373)
SeeAlso: #00379

(Table 00379)
Call VioSetANSI with:
        STACK:  WORD    VIO handle (must be 00h)
                DWORD   pointer to WORD indicating new state of ANSI
                        00h off, 01h on
Return: AX = error code (00h, 74h, 1A4h, 1B4h) (see #00373)
SeeAlso: #00378

(Table 00380)
Call VioGetCurPos with:
        STACK:  WORD    VIO handle (must be 00h)
                DWORD   pointer to WORD to hold current cursor column (0-based)
                DWORD   pointer to WORD to hold current cursor row (0-based)
Return: AX = error code (00h, 74h, 1B4h) (see #00373)
SeeAlso: #00381

(Table 00381)
Call VioSetCurPos with:
        STACK:  WORD    VIO handle (must be 00h)
                WORD    cursor column
                WORD    cursor row
Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see #00373)
Note:   if either coordinate is invalid, the cursor is not moved
SeeAlso: #00380

(Table 00382)
Call VioGetCurType with:
        STACK:  WORD    VIO handle (must be 00h)
                DWORD   pointer to cursor type record (see #00372)
Return: AX = error code (00h, 74h, 1B4h) (see #00373)
SeeAlso: #00383

(Table 00383)
Call VioSetCurType with:
        STACK:  WORD    VIO handle (must be 00h)
                DWORD   pointer to cursor type record (see #00372)
Return: AX = error code (00h, 74h, 1A4h, 1B4h) (see #00373)
SeeAlso: #00384

(Table 00384)
Call VioScrollUp with:
        STACK:  WORD    VIO handle (must be 00h)
                DWORD   pointer to char/attr cell for filling emptied rows
                WORD    number or rows to scroll (FFFFh = clear area)
                WORD    right column of scroll area
                WORD    bottom row of scroll area
                WORD    left column of scroll area
                WORD    top row of scroll area
Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see #00373)
SeeAlso: #00385,INT 10/AH=06h

(Table 00385)
Call VioScrollDn with:
        STACK:  WORD    VIO handle (must be 00h)
                DWORD   pointer to char/attr cell for filling emptied rows
                WORD    number or rows to scroll (FFFFh = clear area)
                WORD    right column of scroll area
                WORD    bottom row of scroll area
                WORD    left column of scroll area
                WORD    top row of scroll area
Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see #00373)
SeeAlso: #00384,INT 10/AH=07h

(Table 00386)
Call VioReadCellStr with:
        STACK:  WORD    VIO handle (must be 00h)
                WORD    column at which to start reading
                WORD    row at which to start reading
                DWORD   pointer to WORD containing length of buffer in bytes
                        on return, WORD contains number of bytes actually read
                DWORD   pointer to buffer for cell string
Return: AX = error code (00h, 74h, 166h ,167h, 1B4h) (see #00373)

(Table 00387)
Call VioReadCharStr with:
        STACK:  WORD    VIO handle (must be 00h)
                WORD    column at which to start reading
                WORD    row at which to start reading
                DWORD   pointer to WORD containing length of buffer in bytes
                        on return, WORD contains number of bytes actually read
                DWORD   pointer to buffer for character string
Return: AX = error code (00h, 74h, 166h ,167h, 1B4h) (see #00373)

(Table 00388)
Call VioWrtCellStr with:
        STACK:  WORD    VIO handle (must be 00h)
                WORD    column at which to start writing
                WORD    row at which to start writing
                WORD    length of cell string in bytes
                DWORD   pointer to cell string to write
Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see #00373)
Note:   write wraps at end of line and terminates if it reaches end of screen

(Table 00389)
Call VioWrtCharStr with:
        STACK:  WORD    VIO handle (must be 00h)
                WORD    column at which to start writing
                WORD    row at which to start writing
                WORD    length of character string
                DWORD   pointer to character string to write
Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see #00373)
Note:   write wraps at end of line and terminates if it reaches end of screen

(Table 00390)
Call VioWrtCharStrAttr with:
        STACK:  WORD    VIO handle (must be 00h)
                DWORD   pointer to attribute to be applied to each character
                WORD    column at which to start writing
                WORD    row at which to start writing
                WORD    length of character string
                DWORD   pointer to character string to write
Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see #00373)
Note:   write wraps at end of line and terminates if it reaches end of screen

(Table 00391)
Call VioWrtNAttr with:
        STACK:  WORD    VIO handle (must be 00h)
                WORD    column at which to start writing
                WORD    row at which to start writing
                WORD    number of times to write attribute
                DWORD   pointer to display attribute to replicate
Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see #00373)
Note:   write wraps at end of line and terminates if it reaches end of screen

(Table 00392)
Call VioWrtNCell with:
        STACK:  WORD    VIO handle (must be 00h)
                WORD    column at which to start writing
                WORD    row at which to start writing
                WORD    number of times to write cell
                DWORD   pointer to cell to replicate
Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see #00373)
Note:   write wraps at end of line and terminates if it reaches end of screen

(Table 00393)
Call VioWrtNChar with:
        STACK:  WORD    VIO handle (must be 00h)
                WORD    column at which to start writing
                WORD    row at which to start writing
                WORD    number of times to write character
                DWORD   pointer to character to replicate
Return: AX = error code (00h, 74h, 166h, 167h, 1B4h) (see #00373)
Note:   write wraps at end of line and terminates if it reaches end of screen
--------V-148102-----------------------------
INT 14 - VIDEO FOSSIL - CLOSE VFOSSIL
        AX = 8102h
Return: AX = 1954h
Note:   terminates all operations; after this call, the video FOSSIL may either
          be removed from memory or reinitialized
SeeAlso: AX=8101h,AX=8103h
--------V-148103-----------------------------
INT 14 - VIDEO FOSSIL - UNINSTALL
        AX = 8103h
Return: AX = 1954h
Note:   this is an extension to the VFOSSIL spec by Bob Hartman's VFOS_IBM
--------K-1482-------------------------------
INT 14 - KEYBOARD FOSSIL
        AH = 82h
SeeAlso: AH=7Eh
--------S-1482-------------------------------
INT 14 - COURIERS.COM - CONFIGURE PORT
        AH = 82h
        AL = port number (1-4)
        BX = speed (bps)
        CX = bit flags
            bit 0: enable input flow control
            bit 1: enable output flow control
            bit 2: use X.PC protocol (not yet implemented)
Return: nothing
SeeAlso: AH=00h,AH=8Ch,INT 7A"X.PC"
--------S-1482-------------------------------
INT 14 - COMM-DRV v14.0 - PORT CLEANUP
        AH = 82h
        DX = port number
Return: AH bit 7 set on error
        AH bit 7 clear if successful
Desc:   reset the port to its state before the AH=81h initialization and unhook
          any interrupts used by the port
SeeAlso: AH=81h"COMM-DRV",AH=83h"COMM-DRV"
----------1483-------------------------------
INT 14 - SYSTEM FOSSIL
        AH = 83h
SeeAlso: AH=7Eh
--------S-1483-------------------------------
INT 14 - COURIERS.COM - START INPUT
        AH = 83h
        ES:BX -> circular input buffer
        CX = length of buffer
                (should be at least 128 bytes if input flow control enabled)
Return: nothing
SeeAlso: AH=18h,AH=87h,AH=8Dh,AH=A5h"BAPI"
--------S-1483-------------------------------
INT 14 - COMM-DRV v14.0 - FLUSH COMMUNICATION BUFFERS
        AH = 83h
        DX = port number
        AL = subfunction
            00h flush input buffer
            01h flush output buffer
            02h flush both buffers
Return: AH bit 7 set on error
        AH bit 7 clear if successful
SeeAlso: AH=81h"COMM-DRV",AH=84h"COMM-DRV"
--------S-1484-------------------------------
INT 14 - COURIERS.COM - READ CHARACTER
        AH = 84h
Return: ZF set if no characters available
        ZF clear
           AL = character
           AH = modem status bits
                bit 7: set on input buffer overflow
SeeAlso: AH=02h,AH=86h,AH=89h
--------S-1484-------------------------------
INT 14 - COMM-DRV v14.0 - SEND PACKET
        AH = 84h
        CX = packet length in bytes
        DX = port number
        ES:DI -> packet to be sent
Return: AH = line status (see #00304)
            bit 7 set on error
        AL destroyed
SeeAlso: AH=83h"COMM-DRV",AH=85h"COMM-DRV",AH=86h"COMM-DRV"
--------S-1485-------------------------------
INT 14 - COURIERS.COM - FLUSH PENDING INPUT
        AH = 85h
Return: nothing
SeeAlso: AH=0Ah,AH=88h"COURIERS"
--------S-1485-------------------------------
INT 14 - COMM-DRV v14.0 - RECEIVE PACKET
        AH = 85h
        CX = length of packet in bytes
        DX = port number
        ES:DI -> buffer for packet
Return: AH = line status (see #00304)
            bit 7 set on error
        AL destroyed
Note:   this call requires that at least the requested number of bytes are
          already present in the input buffer, and will fail if there are
          fewer bytes available
SeeAlso: AH=84h"COMM-DRV",AH=86h"COMM-DRV",AH=8Eh"COMM-DRV"
--------S-1486-------------------------------
INT 14 - COURIERS.COM - START OUTPUT
        AH = 86h
        ES:BX -> output buffer
        CX = length of output buffer
Return: nothing
SeeAlso: AH=19h,AH=83h"COURIERS",AH=A4h"BAPI"
--------S-1486-------------------------------
INT 14 - COMM-DRV v14.0 - SET INPUT/OUTPUT TIMEOUTS
        AH = 86h
        BL = maximum clock ticks to wait before signalling error on input func
        BH = maximum clock ticks to wait before signalling error on output
        DX = port number
        SI = input timeout in clock ticks if BL=FFh and BH=FFh
        DI = output timeout in clock ticks if BL=FFh and BH=FFh
Return: AH bit 7 set on error
        AH bit 7 clear if successful
Note:   functions 02h, 85h, and 8Eh will wait for the input timeout before
          returning an error when no data is available; functions 01h and 84h
          will wait for the output timeout before returning an error if there
          is no space to output the data
SeeAlso: AH=01h,AH=02h,AH=84h"COMM-DRV",AH=85h"COMM-DRV",AH=8Eh"COMM-DRV"
--------S-1487-------------------------------
INT 14 - COURIERS.COM - OUTPUT STATUS
        AH = 87h
Return: AX = number of unsent characters
SeeAlso: AH=88h"COURIERS"
--------S-1487-------------------------------
INT 14 - COMM-DRV v14.0 - TURN ON DTR
        AH = 87h
        DX = port number
Return: AH bit 7 set on error
        AH bit 7 clear if successful
SeeAlso: AX=8000h"COMM-DRV",AH=88h"COMM-DRV",AH=89h"COMM-DRV"
--------S-1488-------------------------------
INT 14 - COURIERS.COM - ABORT OUTPUT
        AH = 88h
SeeAlso: AH=09h"FOSSIL",AH=85h"COURIERS"
--------S-1488-------------------------------
INT 14 - COMM-DRV v14.0 - TURN OFF DTR
        AH = 88h
        DX = port number
Return: AH bit 7 set on error
        AH bit 7 clear if successful
Program: COMM-DRV is a universal serial communications driver by Willies'
          Computer Software Company, which supports standard INT 14 and
          FOSSIL calls as well as its own interfaces
SeeAlso: AX=8000h"COMM-DRV",AH=87h"COMM-DRV",AH=8Ah"COMM-DRV"
--------S-1489-------------------------------
INT 14 - COURIERS.COM - SEND SINGLE CHARACTER
        AH = 89h
        CL = character to send
Return: nothing
SeeAlso: AH=01h,AH=84h"COURIERS"
--------S-1489-------------------------------
INT 14 - COMM-DRV v14.0 - TURN ON RTS
        AH = 89h
        DX = port number
Return: AH bit 7 set on error
        AH bit 7 clear if successful
SeeAlso: AX=8000h"COMM-DRV",AH=87h"COMM-DRV",AH=8Ah"COMM-DRV"
--------S-148A-------------------------------
INT 14 - COURIERS.COM - SEND BREAK
        AH = 8Ah
Return: nothing
SeeAlso: AH=89h"COURIERS",AH=FAh
--------S-148A-------------------------------
INT 14 - COMM-DRV v14.0 - TURN OFF RTS
        AH = 8Ah
        DX = port number
Return: AH bit 7 set on error
        AH bit 7 clear if successful
SeeAlso: AX=8000h"COMM-DRV",AH=88h"COMM-DRV",AH=89h"COMM-DRV"
--------S-148B-------------------------------
INT 14 - COMM-DRV v14.0 - SET USER INTERRUPT ROUTINE
        AH = 8Bh
        CX = bitmask of interrupt to process
            00h = deinstall
        BX:DI -> DWORD containing address of function to be called
Return: AH bit 7 clear if successful
        AH bit 7 set on error
--------S-148C-------------------------------
INT 14 - COURIERS.COM - SET SPEED
        AH = 8Ch
        BX = speed in bps
Return: nothing
SeeAlso: AH=00h,AH=82h"COURIERS"
--------S-148C-------------------------------
INT 14 - COMM-DRV v14.0 - READ UART REGISTER
        AH = 8Ch
        AL = register offset
        DX = port number
Return: AH bit 7 set on error
        AH bit 7 clear if successful
            AL = contents of UART register
SeeAlso: AH=8Dh"COMM-DRV"
--------S-148D-------------------------------
INT 14 - COURIERS.COM - DECONFIGURE PORT
        AH = 8Dh
Return: nothing
SeeAlso: AH=82h"COURIERS"
--------S-148D-------------------------------
INT 14 - COMM-DRV v14.0 - WRITE UART REGISTER
        AH = 8Dh
        AL = register offset
        BL = new value for UART register
        DX = port number
Return: AH bit 7 set on error
        AH bit 7 clear if successful
SeeAlso: AH=8Ch"COMM-DRV"
--------S-148E-------------------------------
INT 14 - COMM-DRV v14.0 - READ PACKET NONDESTRUCTIVELY
        AH = 8Eh
        CX = length of packet in bytes
        DX = port number
        ES:DI -> buffer for packet
Return: AH = line status (see #00304)
            bit 7 set on error (see AX=8000h"COMM-DRV")
        AL destroyed
Program: COMM-DRV is a universal serial communications driver by Willies'
          Computer Software Company, which supports standard INT 14 and
          FOSSIL calls as well as its own interfaces
Desc:   retrieve a packet from the input buffer without removing it from the
          buffer
Note:   this call requires that at least the requested number of bytes are
          already present in the input buffer, and will fail if there are
          fewer bytes available
SeeAlso: AX=8000h"COMM-DRV",AH=84h"COMM-DRV",AH=85h"COMM-DRV",AH=86h"COMM-DRV"
--------S-14A0-------------------------------
INT 14 - 3com BAPI SERIAL I/O - CONNECT TO PORT
        AH = A0h
        ES:BX -> ASCIZ internet host name
        CX = length of name
Return: AH = return code (00h,04h-06h,08h,0Ah-0Ch) (see #00394)
        CL = session ID
Program: the Bridge Application Program Interface is a set of functions which
          makes many of the details of LAN communications transparent
Note:   Novell TELAPI.EXE returns AH=09h (not supported) and CL=00h
SeeAlso: AH=A1h"BAPI",AH=A2h"BAPI",AH=A5h"BAPI",AX=AF00h

(Table 00394)
Values for 3com BAPI return code:
 00h    successful
 01h    no characters written
 02h    no characters read
 03h    no such session
 04h    clearinghouse name not found
 05h    no response from host
 06h    no more sessions available
 07h    session aborted
 08h    invalid clearinghouse name
 09h    not supported
 0Ah    internal (general) network error
 0Bh    out of memory
 0Ch    invalid IP address
--------S-14A0--CXFFFF-----------------------
INT 14 - Interconnections Inc. TES - INSTALLATION CHECK/STATUS REPORT
        AH = A0h
        CX = FFFFh
Return: CF clear if successful
            AX = 5445h ('TE')
            CX <> FFFFh
            DX = port number
        CF set on error
Program: TES is a network serial port emulation program
SeeAlso: AH=A1h"TES"
--------S-14A1-------------------------------
INT 14 - 3com BAPI SERIAL I/O - DISCONNECT FROM PORT
        AH = A1h
        DH = session ID (00h for external session managment)
Return: AH = return code (00h,03h,07h,0Ah,0Bh) (see #00394)
        AL destroyed (Novell TELAPI.EXE)
SeeAlso: AH=A0h"BAPI"
--------S-14A1-------------------------------
INT 14 - Interconnections Inc. TES - GET LIST OF SESSIONS WITH STATUS
        AH = A1h
Return: CX = number of active sessions
        ES:SI -> status array (see #00395)
SeeAlso: AH=A2h"TES",AH=A3h"TES"

Format of Interconnections TES status array entry:
Offset  Size    Description     (Table 00395)
 00h    BYTE    status
 01h    WORD    offset of name
--------S-14A2-------------------------------
INT 14 - 3com BAPI SERIAL I/O - WRITE CHARACTER
        AH = A2h
        AL = character
        DH = session ID (00h for external session managment)
Return: AH = return code (00h,01h,03h,07h,0Ah,0Bh) (see #00394)
SeeAlso: AH=A0h"BAPI",AH=A3h"BAPI",AH=A4h"BAPI"
--------S-14A2-------------------------------
INT 14 - Interconnections Inc. TES - GET LIST OF SERVER NAMES
        AH = A2h
Return: CX = number of servers
        ES:SI -> array of offsets from ES for server names
SeeAlso: AH=A1h"TES"
--------S-14A3-------------------------------
INT 14 - 3com BAPI SERIAL I/O - READ CHARACTER
        AH = A3h
        DH = session ID (00h for external session managment)
Return: AH = return code (00h,02h,03h,07h,0Ah,0Bh) (see #00394)
        AL = character read or 00h if none available
SeeAlso: AH=A0h"BAPI",AH=A2h"BAPI",AH=A5h"BAPI",AH=A7h"BAPI"
--------S-14A3-------------------------------
INT 14 - Interconnections Inc. TES - START A NEW SESSION
        AH = A3h
        ES:SI -> ???
Return: CF clear if successful
            AX = 5445h ('TE')
            CX <> FFFFh
            DX = port number
        CF set on error
SeeAlso: AH=A1h"TES",AH=A4h"TES",AH=A6h"TES"
--------S-14A4-------------------------------
INT 14 - 3com BAPI SERIAL I/O - WRITE BLOCK
        AH = A4h
        CX = length of buffer in bytes
        DH = session ID (00h for external session managment)
        ES:BX -> buffer containing data
Return: AH = return code (00h,01h,03h,07h,0Ah,0Bh) (see #00394)
        CX = number of bytes actually sent
SeeAlso: AH=19h,AH=86h,AH=A0h"BAPI",AH=A5h"BAPI"
--------S-14A4-------------------------------
INT 14 - Interconnections Inc. TES - HOLD CURRENTLY ACTIVE SESSION
        AH = A4h
        ???
Return: ???
SeeAlso: AH=A3h"TES",AH=A5h"TES"
--------S-14A5-------------------------------
INT 14 - 3com BAPI SERIAL I/O - READ BLOCK
        AH = A5h
        CX = length of buffer
        DH = session ID (00h for external session managment)
        ES:BX -> buffer for data
Return: AH = return code (00h,02h,03h,07h,0Ah,0Bh) (see #00394)
        CX = number of bytes actually read
SeeAlso: AH=18h,AH=83h"COURIERS",AH=A0h"BAPI",AH=A3h"BAPI",AH=A4h"BAPI"
SeeAlso: AH=A7h"BAPI",AX=FF02h
--------S-14A5-------------------------------
INT 14 - Interconnections Inc. TES - RESUME A SESSION
        AH = A5h
        AL = session number
Return: ???
SeeAlso: AH=A4h"TES",AH=A6h"TES"
--------S-14A6-------------------------------
INT 14 - 3com BAPI SERIAL I/O - SEND SHORT BREAK
        AH = A6h
        DH = session ID (00h for external session managment)
Return: AH = return code (00h,03h,07h,0Ah,0Bh) (see #00394)
Desc:   generate a short break signal; if data delivery was turned off by the
          break, wait for the host to turn it on again
SeeAlso: AH=1Ah,AH=8Ah,AH=FAh,AH=A0h"BAPI"
--------S-14A6-------------------------------
INT 14 - Interconnections Inc. TES - DROP A SESSION
        AH = A6h
        AL = session number
Return: AH = status
            00h successful
            else error
SeeAlso: AH=A3h"TES",AH=A5h"TES"
--------S-14A7-------------------------------
INT 14 - 3com BAPI SERIAL I/O - READ STATUS
        AH = A7h
        DH = session ID (00h for external session managment)
Return: AH = return code (00h,03h,07h,0Ah,0Bh) (see #00394)
        CX = number of bytes available for reading
Note:   Novell TELAPI.EXE v4.01 always returns either 0 or 1 bytes available
SeeAlso: AH=A5h"BAPI"
--------S-14A7-------------------------------
INT 14 - Interconnections Inc. TES - SWITCH TO NEXT ACTIVE SESSION
        AH = A7h
        ???
Return: ???
SeeAlso: AH=A3h"TES",AH=A5h"TES"
--------S-14A8-------------------------------
INT 14 - Interconnections Inc. TES - SEND STRING TO COMMAND INTERPRETER
        AH = A8h
        AL = 00h no visible response
        ES:SI -> ASCIZ command
Return: ???
--------N-14A8-------------------------------
INT 14 - Novell TelAPI v4.01 - CONNECTION INFORMATION???
        AH = A8h
        DH = session ID???
        CH = subfunction
            02h ???
            0Dh ???
            0Fh ???
            10h ???
            11h ???
            28h ???
            else
                Return: AH = 09h (not supported)
Return: AH = return code (see #00394)
            00h successful
                CL = ??? (0/1/8) (subfunctions 02h,0Dh,0Fh,10h)
                CL = ??? (7Fh/FFh) (subfunction 28h)
                CX = ??? (subfunction 11h)
SeeAlso: AH=A9h"TelAPI"
--------N-14A9-------------------------------
INT 14 - Novell TelAPI v4.01 - CONNECTION CONTROL???
        AH = A9h
        DH = session ID???
        CH = subfunction
            02h ???
            0Dh ???
            0Fh ???
            10h ???
            11h ???
            28h ???
            else
                Return: AH = 09h (not supported)
        ???
Return: AH = return code (see #00394)
        ???
SeeAlso: AH=A8h"TelAPI",AH=E4h,INT 6B/AX=0600h
--------V-14AA01-----------------------------
INT 14 - DimVGA v2.0+ - INSTALLATION CHECK
        AX = AA01h
Return: AX = FFFFh if installed, unchanged
        BX = version (v1.5+ only), BH = major, BL = minor (v1.5 = 0105h)
        CX = resident segment (v3.1+)
Program: DimVGA is a public domain screen saver by Menno Pieters
SeeAlso: AX=AA02h,AX=AA03h,AX=AA06h,INT 11/AX=0225h/BX=6900h,INT 12"KEYBUI"
SeeAlso: INT 2D/AL=10h"Burnout Plus",INT 2F/AX=6400h,INT 2F/AH=93h
SeeAlso: INT 2F/AX=C000h"VGAsave",INT 2F/AX=C000h"AD-DOS",INT 2F/AX=C050h
SeeAlso: INT 2F/AX=E300h
Index:  screen saver;DimVGA
--------V-14AA02-----------------------------
INT 14 - DimVGA v2.0+ - SET TIME-OUT (DIMMING/BLANKING) PERIOD
        AX = AA02h
        BX = number of clock ticks
Return: AX = FFFFh
Note:   on screen modes with 256 or less colors DimVGA will dim the screen,
          when more than 256 colors can be used DimVGA will blank the screen.
SeeAlso: AX=AA01h,AX=AA03h,AX=AA04h,AX=AA06h
Index:  screen saver;DimVGA
--------V-14AA03-----------------------------
INT 14 - DimVGA v2.0+ - SET DIMMING FACTOR
        AX = AA03h
        BX = percentage remaining visible (1-99)
Return: AX = FFFFh
SeeAlso: AX=AA02h,AX=AA05h,AX=AA06h
Index:  screen saver;DimVGA
--------V-14AA04-----------------------------
INT 14 - DimVGA v2.0+ - GET TIME-OUT PERIOD
        AX = AA04h
Return: AX = FFFFh
        BX = current time-out in clock ticks
SeeAlso: AX=AA02h,AX=AA05h,AX=AA0Ah
Index:  screen saver;DimVGA
--------V-14AA05-----------------------------
INT 14 - DimVGA v2.0+ - GET DIMMING FACTOR
        AX = AA05h
Return: AX = FFFFh
        BX = current dimming factor
SeeAlso: AX=AA03h,AX=AA04h,AX=AA0Ah
Index:  screen saver;DimVGA
--------V-14AA06-----------------------------
INT 14 - DimVGA v2.0+ - DISABLE
        AX = AA06h
Return: AX = FFFFh
SeeAlso: AX=AA01h,AX=AA07h,AX=AA0Ah
Index:  screen saver;DimVGA
--------V-14AA07-----------------------------
INT 14 - DimVGA v2.0+ - ENABLE
        AX = AA07h
Return: AX = FFFFh
SeeAlso: AX=AA01h,AX=AA06h,AX=AA0Ah
Index:  screen saver;DimVGA
--------V-14AA08-----------------------------
INT 14 - DimVGA v2.0+ - DIM SCREEN 'MANUALLY'
        AX = AA08h
Return: AX = FFFFh
Note:   this function will dim the screen immediately, even if DimVGA is
          currently disabled
SeeAlso: AX=AA01h,AX=AA02h,AX=AA09h
Index:  screen saver;DimVGA
--------V-14AA09-----------------------------
INT 14 - DimVGA v2.0+ - UNDIM SCREEN 'MANUALLY'
        AX = AA09h
Return: AX = FFFFh
Note:   this function will undim the screen immediately, even if DimVGA is
          currently disabled
SeeAlso: AX=AA01h,AX=AA08h
Index:  screen saver;DimVGA
--------V-14AA0A-----------------------------
INT 14 - DimVGA v2.0+ - CHECK WHETHER ENABLED
        AX = AA0Ah
Return: AX = FFFFh
        BX = current state (0000h disabled, 0001h enabled)
SeeAlso: AX=AA01h,AX=AA06h,AX=AA07h
Index:  screen saver;DimVGA
--------V-14AA0B-----------------------------
INT 14 - DimVGA v2.1+ - SET HOTKEY
        AX = AA0Bh
        BH = shift state (see #00396)
        BL = keyboard scancode
Return: AX = FFFFh
SeeAlso: AX=AA01h,AX=AA0Ch
Index:  screen saver;DimVGA

Bitfields for DimVGA hotkey shift state:
Bit(s)  Description     (Table 00396)
 7-4    unused
 3      Alt key pressed
 2      Ctrl key pressed
 1      Left shift key pressed
 0      Right shift key pressed
--------V-14AA0C-----------------------------
INT 14 - DimVGA v2.1+ - GET HOTKEY
        AX = AA0Ch
Return: AX = FFFFh
        BH = shift state (see #00396)
        BL = keyboard scancode
SeeAlso: AX=AA01h,AX=AA0Bh
Index:  screen saver;DimVGA
--------V-14AA0D-----------------------------
INT 14 - DimVGA v3.0+ - SET MOUSE CHECK STATUS
        AX = AA0Dh
        BX = new mouse check status
            0000h mouse checking off
            0001h mouse checking on
Return: AX = FFFFh
Note:   before switching mouse checking on, a mouse driver should be
          found in memory. If no mouse driver is found, mouse checking
          should be switched off (resident DimVGA does not check by itself).
SeeAlso: AX=AA01h,AX=AA0Eh
Index:  screen saver;DimVGA
--------V-14AA0E-----------------------------
INT 14 - DimVGA v3.0+ - GET MOUSE CHECK STATUS
        AX = AA0Eh
Return: BX = mouse check status (0000h disabled, 0001h enabled)
SeeAlso: AX=AA01h,AX=AA0Dh
Index:  screen saver;DimVGA
--------V-14AA0F-----------------------------
INT 14 - DimVGA v3.4 - SET LOCKING STATUS
        AX = AA0Fh
        BX = locking status
            0000h disabled
            0001h enabled
Return: AX = FFFFh
SeeAlso: AX=AA01h,AX=AA0Dh,AX=AA10h
Index:  screen saver;DimVGA
--------V-14AA10-----------------------------
INT 14 - DimVGA v3.4 - GET MOUSE CHECK STATUS
        AX = AA10h
Return: BX = locking status (0000h disabled, 0001h enabled)
SeeAlso: AX=AA01h,AX=AA0Dh,AX=AA0Fh
Index:  screen saver;DimVGA
----------14AD-------------------------------
INT 14 - IBM SurePath BIOS - Officially "Private" Function
        AH = ADh
SeeAlso: AH=AEh"IBM",AH=AFh"IBM"
----------14AE-------------------------------
INT 14 - IBM SurePath BIOS - Officially "Private" Function
        AH = AEh
SeeAlso: AH=ADh"IBM",AH=AFh"IBM"
----------14AF-------------------------------
INT 14 - IBM SurePath BIOS - Officially "Private" Function
        AH = AFh
SeeAlso: AH=ADh"IBM",AH=AEh"IBM"
--------S-14AF00BXAAAA-----------------------
INT 14 - 3com BAPI SERIAL I/O - INSTALLATION CHECK
        AX = AF00h
        BX = AAAAh
Return: AX = AF01h if installed
            BH = protocol type (if BX=AAAAh on entry)
                01h NetManage TCP/IP
            BL = version for protocol type (if BX=AAAAh on entry)
Note:   early versions of the BAPI and the ROM BIOS simply destroy AX; this
          behavior is used to determine whether the newer functions (AH=B0h,
          AH=B1h,etc) are available
SeeAlso: AH=A0h"BAPI"
--------S-14B0-------------------------------
INT 14 - 3com BAPI SERIAL I/O - EN/DISABLE "ENTER COMMAND MODE" (ECM) CHARACTER
        AH = B0h
        AL = new state (00h disabled, 01h enabled)
Return: AH = return code (00h,07h,0Ah) (see #00394)
Note:   disabling the ECM character allows applications to send data which
          includes the ECM character
SeeAlso: AX=AF00h"BAPI",AH=B1h,AH=B2h
--------S-14B1-------------------------------
INT 14 - 3com BAPI SERIAL I/O - ENTER COMMAND MODE
        AH = B1h
Return: AH = return code (00h,07h,0Ah) (see #00394)
Desc:   provide a means for the application or terminal emulator to perform
          the same action normally caused by the ECM character
SeeAlso: AH=B0h,AH=B2h
--------S-14B2-------------------------------
INT 14 - 3com BAPI SERIAL I/O - GET ECM WATCH STATE
        AH = B2h
Return: AH = return code (00h,07h,0Ah) (see #00394)
        AL = watch flag (00h disabled, 01h enabled)
Desc:   determine whether the ECM character is enabled
SeeAlso: AH=B0h,AH=B1h
--------S-14B3-------------------------------
INT 14 - 3com BAPI SERIAL I/O - GET/SET CONFIGURATION INFO
        AH = B3h
        AL = direction (00h get, 01h set)
        DH = session ID (00h for external session managment)
        DL = configuration item (00h = end-of-line mapping)
        CX = new configuration item value (if AL=01h)
            ---if DL=00h---
            CH = application EOL type (app to Telnet client)
                01h application will send lone CR
                02h application will send CR-? pair
            CL = driver EOL type (Telnet client to Telnet server)
                01h driver should send CR-NUL pair
                02h driver should send CR-LF pair
Return: AH = return code (00h,03h,09h-0Bh) (see #00394)
        ---if AL=00h---
        CX = configuration item value (above)
SeeAlso: AH=B2h
--------N-14E0-------------------------------
INT 14 - TelAPI - "telopen" - CREATE TELNET CONNECTION (BLOCKING)
        AH = E0h
        BX = port number to connect with (default 0017h used if <= 0)
        CX:DX = Internet address of remote host
        DS:DI -> 2-byte remote host (session) identifier
        ES:SI -> 1700-byte buffer for Telnet state record
            0000h:0000h to use TelAPI internally-allocated space
Return: AX = status (0000h-0009h,FED3h,FF37h,FFBDh,FFC0h,FFCDh) (see #00397)
        ES:SI buffer filled with state record
        ES:SI -> internally-allocated state record in some versions
Note:   the remote host identifier may be used to refer to this connection
SeeAlso: AH=E1h,AH=ECh,AX=FF00h

(Table 00397)
Values for TelAPI status:
 0000h-7FFFh    successful (session number)
 FED3h  (-301)  no session allocated, or out of TelAPI data space
 FF37h  (-201)  all sessions in use
 FFBDh  (-67)   unknown hostname
 FFC0h  (-64)   host not functioning
 FFC3h  (-61)   connection attempt refused
 FFC4h  (-60)   connection attempt timed out
 FFC8h  (-56)   socket already connected
 FFCDh  (-51)   network is unreachable
 FFDDh  (-35)   operation would block
--------S-14E000-----------------------------
INT 14 - MX5 Extended FOSSIL - GET MNP STATUS BLOCK
        AX = E000h
        DX = port number (0-3)
Return: ES:BX -> status block (see #00398)
Program: MX5 is a FOSSIL driver by MagicSoft which emulates MNP Level 5, and
          ships with the METZ terminal program as MTEMNP.DRV (a TSR despite
          the .DRV extension)
SeeAlso: AX=E006h

Format of MX5 Extended FOSSIL status block:
Offset  Size    Description     (Table 00398)
 00h    BYTE    flag: active (00h no, 01h yes)
 01h    BYTE    MNP level (2,4,5)
 02h    BYTE    series ID from remote MNP
 03h    DWORD   total packets transmitted
 07h    DWORD   duplicate packets transmitted
 0Bh    DWORD   maximum speed
 0Fh    DWORD   total packets received
 13h    DWORD   duplicate packets received
 17h    DWORD   maximum speed
--------S-14E001-----------------------------
INT 14 - MX5 Extended FOSSIL - GET/SET MNP LEVEL
        AX = E001h
        BH = function
            00h get MNP level
            01h set MNP level
                BL = new level (00h none, 02h/04h/05h MNP level N)
        DX = port number (0-3)
Return: BL = MNP level
SeeAlso: AX=E002h,AX=E003h,AX=E004h,AX=E006h
--------S-14E002-----------------------------
INT 14 - MX5 Extended FOSSIL - GET/SET MNP ANSWER/ORIGINATE MODE
        AX = E002h
        BH = function
            00h get answer/originate mode
            01h set mode
                BL = new mode (00h originate [default], 01h answer)
        DX = port number (0-3)
Return: BL = answer/originate mode
SeeAlso: AX=E001h,AX=E003h,AX=E006h
--------S-14E003-----------------------------
INT 14 - MX5 Extended FOSSIL - GET/SET MNP WAIT TICKS
        AX = E003h
        BH = function
            00h get wait ticks
            01h set wait ticks
                BL = MNP wait ticks (default 0Eh)
        DX = port number (0-3)
Return: BL = wait ticks
SeeAlso: AX=E001h,AX=E002h,AX=E006h
--------S-14E004-----------------------------
INT 14 - MX5 Extended FOSSIL - GET/SET MNP CONNECT SOUND LEVEL
        AX = E004h
        BH = function
            00h get sound level
            01h set sound level
                BL = new sound level (00h off, 01h on [default])
        DX = port number
Return: BL = sound state
Desc:   specify whether MX5 should generate beeps after an MNP connection
          (three high beeps if successful, high then low on connection failure)
SeeAlso: AX=E002h,AX=E006h
--------S-14E005-----------------------------
INT 14 - MX5 Extended FOSSIL - UNINSTALL
        AX = E005h
Return: BX = segment of MX5's memory block or 0000h on failure
Note:   caller must free the returned memory block to complete the uninstall
SeeAlso: AX=E006h
--------S-14E006BX0000-----------------------
INT 14 - MX5 Extended FOSSIL - INSTALLATION CHECK
        AX = E006h
        BX = 0000h
Return: BX = 4D58h ('MX') if installed
            AH = major version
            AL = minor version
SeeAlso: AX=E000h,AX=E001h,AX=E005h,AX=E007h
--------S-14E007-----------------------------
INT 14 - MX5 Extended FOSSIL - WAIT SPECIFIED NUMBER OF TICKS
        AX = E007h
        CX = number of ticks to wait
Return: nothing
SeeAlso: AX=E006h
--------N-14E1-------------------------------
INT 14 - TelAPI - "telclose" - TERMINATE TELNET CONNECTION
        AH = E1h
        BX = connection ID
Return: AX = status (0000h,FFF7h,maybe others) (see #00397)
Note:   flushes and releases all buffers and data space used by the connection
SeeAlso: AH=E0h,AH=E6h,AX=FF00h
--------N-14E2-------------------------------
INT 14 - TelAPI - "telread" - BUFFERED READ
        AH = E2h
        BX = connection ID (see AH=E0h"TelAPI")
        CX = length of buffer in bytes
        ES:SI -> buffer for data
Return: AX > 0000h number of characters actually read
        AX = 0000h host has closed connection
        AX < 0000h error code (see #00397)
Note:   translates CRLF into local EOL if the connection is in ASCII mode,
          negotiates various Telnet options, and immediately executes several
          different Telnet action commands
SeeAlso: AH=07h"TelAPI",AH=E3h,AH=E6h,AX=FF00h,INT 6B/AH=01h
--------N-14E3-------------------------------
INT 14 - TelAPI - "telwrite" - BUFFERED WRITE
        AH = E3h
        BX = connection ID
        CX = length of buffer in bytes
        ES:SI -> buffer containing data
Return: AX > 0000h number of characters actually written
        AX < 0000h error code (see #00397)
Note:   translates local EOL into CRLF if the connection is in ASCII mode,
          sends the appropriate Telnet commands for the characters selected
          for IP, AYT, AO, EC, EL, and Break
SeeAlso: AH=06h"TelAPI",AH=E2h,AH=E6h,AX=FF00h,INT 6B/AH=00h
--------N-14E4-------------------------------
INT 14 - TelAPI - "telioctl" - CONNECTION CONTROL
        AH = E4h
        BX = connection ID (see AH=E0h"TelAPI")
        CX = Telnet command/option identifier (see #00400)
        ES:SI -> buffer containing command/option argument (see #00399)
Return: AX = status (0000h, etc.) (see #00397)
Desc:   start filter control, initiate Telnet option negotiation, or get filter
          control status
SeeAlso: AH=A9h,AH=E6h,AX=FF00h,INT 6B/AX=0600h

Format of TelAPI Telnet command/option argument:
Offset  Size    Description     (Table 00399)
 00h  5 WORD    numeric arguments
 0Ah    DWORD   -> ASCIZ string
SeeAlso: #00400

(Table 00400)
Values for TelAPI Telnet command/option identifier:
 01h    ASCII           args: none
 02h    BINARY          args: none
 03h    LOCALECHO       args: none              client echos data
 04h    REMOTEECHO      args: none              server echos data
 05h    SGA             args: none              Suppress Go-Ahead signal
 07h    CHARMODE        args: none              no line-buffering
 08h    LINEMODE        args: -> erase-line ch  perform line-buffering
 09h    RECVEOL         args: EOL type
 0Ah    SENDEOL         args: EOL type
 0Bh    EOR             args: none              enable end-of-record sequence
 0Dh    BREAK           args: -> break char
 0Eh    VERBOSE         args: verbosity         display Telnet negotiations?
 0Fh    AYT             args: -> AYT escape ch
 10h    AO              args: -> AO escape char
 11h    IP              args: -> IP escape char
 12h    EC              args: -> escape char
 13h    EL              args: -> escape char
 14h    STATUS          args: type; returns data in structure
 18h    TERMTYPE        args: -> terminal type
 19h    ATTACHPORT      args: port number ; returns session number
 1Bh    TRANSMIT_EOR    args: EOR enabled       append EOR to every telwrite?
SeeAlso: #00399
--------N-14E5-------------------------------
INT 14 - TelAPI - "telreset" - RESET ALL CONNECTIONS
        AH = E5h
Return: AX = status (0000h,other) (see also #00397)
            FFFFh unable to reset
Desc:   close all sessions and reset TelAPI to defaults
SeeAlso: AH=E1h,AH=E6h,AX=FF00h
--------N-14E6-------------------------------
INT 14 - TelAPI - "telunload" - UNINSTALL
        AH = E6h
Return: AX = status
            0000h successful
            FFFFh unable to uninstall
Notes:  TelAPI also supports the NASI/NACS and NCSI APIs on INT 6B
        this function invokes AH=E5h internally
SeeAlso: AH=E5h,AX=FF00h,INT 6B/AH=00h,INT 6B/AH=10h
--------N-14E7-------------------------------
INT 14 - TelAPI - "tellist" - GET TELNET SESSION LIST
        AH = E7h
        ES:SI -> 10-word buffer for session list
Return: AX = 0000h (successful)
        ES:SI buffer filled
Desc:   determine, for each of the ten allowable sessions, whether the session
          is currently available
Note:   each word in the buffer is filled with either 0000h to indicate that
         the corresponding sesion is unavailable, or 0001h if available
SeeAlso: AH=E0h,AH=E5h,AX=FF00h
--------N-14E8-------------------------------
INT 14 - TelAPI - "telattach" - ATTACH COM PORT TO/FROM TELNET SESSION
        AH = E8h
        BX = connection ID (see AH=E0h"TelAPI")
        CX = serial port number (0000h-0003h = COM1-COM4)
Return: AX = status
            0000h successful
            FFFFh failed
SeeAlso: AH=E0h,AH=E9h,AX=FF00h
--------N-14E9-------------------------------
INT 14 - TelAPI - "telportosn" - GET SESSION NUMBER FOR COM PORT
        AH = E9h
        DX = serial port number (0000h-0003h = COM1-COM4)
Return: AX >= 0000h session number
        AX < 0000h error code (see #00397)
SeeAlso: AH=E0h,AH=E8h,AH=EAh,AX=FF00h
--------N-14EA-------------------------------
INT 14 - TelAPI - "telstatus" - GET TELNET CONNECTION STATUS INFORMATION
        AH = EAh
        BX = connection ID (see AH=E0h"TelAPI")
        ES:SI -> buffer for status info (see #00401)
Return: AX = status (0000h,FFFFh,etc.)
SeeAlso: AH=E9h,AH=EBh,AX=FF00h

Format of TelAPI Telnet connection status information:
Offset  Size    Description     (Table 00401)
 00h  4 BYTEs   remote host IP address
 04h 20 BYTEs   reserved
 18h    WORD    local port number
 1Ah    BYTE    connection mode (00h = ASCII, 01h = Binary)
 1Bh    BYTE    echo flag (00h local, 01h remote)
 1Ch    BYTE    SGA flag (00h will, 01h won't)
 1Dh    BYTE    EOR negotation flag (00h do negotiate, 01h don't)
 1Eh    BYTE    buffering (00h line mode, 01h character mode)
 1Fh    BYTE    reserved
 20h    BYTE    verbose flag (00h no, 01h verbose mode)
 21h    BYTE    received EOL (00h no xlat, 01h CR, 02h LF, 03h CRLF)
 22h    BYTE    sent EOL (00h no translation, 01h CR, 02h LF)
 23h    BYTE    break character
 24h    BYTE    IP escape character
 25h    BYTE    AO escape character
 26h    BYTE    AYT escape character
 27h    BYTE    EC escape character
 28h    BYTE    EL escape character
 29h 41 BYTEs   ASCIZ Telnet-negotiated terminal type
 52h  9 BYTEs   session ID
SeeAlso: #00402
--------N-14EB-------------------------------
INT 14 - TelAPI - "telname" - GET AVAILABLE/INUSE STATUS FOR ALL SESSIONS
        AH = EBh
        ES:SI -> buffer for session statuses (see #00402)
Return: ES:SI buffer filled
SeeAlso: AH=E9h,AH=EAh,AX=FF00h

Format of TelAPI session status information [array]:
Offset  Size    Description     (Table 00402)
 00h    BYTE    session state (00h available, 01h connected)
 01h  9 BYTEs   session ID if connected
 0Ah    WORD    attached COM port if connected, FFFFh if not
SeeAlso: #00401
--------N-14EC-------------------------------
INT 14 - TelAPI - "telnblkopen" - CREATE TELNET CONNECTION (NON-BLOCKING)
        AH = ECh
        BX = port number to connect with (default 0017h used if <= 0)
        CX:DX = Internet address of remote host
        DS:DI -> 2-byte remote host (connection) identifier
        ES:SI -> 1700-byte buffer for Telnet state record
            0000h:0000h to use TelAPI internally-allocated space
Return: AX = status (0000h-0009h,FED3h,FF37h,FFBDh,FFC0h,FFCDh) (see #00397)
        ES:SI buffer filled with state record
        ES:SI -> internally-allocated state record in some versions
Notes:  the remote host identifier may be used to refer to this connection
        this function returns immediately; use AH=EDh to check whether the
          connection has been established yet
        this function is not supported by the Microdyne TelAPI v3.7
SeeAlso: AH=E0h"TelAPI",AH=EDh,AX=FF00h
--------N-14ED-------------------------------
INT 14 - TelAPI - "telpoll" - POLL TELNET SESSION FOR CONNECTION COMPLETION
        AH = EDh
        BX = connection ID (see AH=ECh)
Return: AX = status (0000h,0001h,FFFFh,etc.) (see also #00397)
            0000h session now connected
            0001h connection still in progress
Note:   this function is not supported by the Microdyne TelAPI v3.7
SeeAlso: AH=EDh,AX=FF00h
--------a-14F0F0-----------------------------
INT 14 - ASAP v1.0 - ???
        AX = F0F0h
        DX = ???
        ???
Return: ???
Program: ASAP (Automatic Screen Access Program) is a shareware screen reader
          by MicroTalk
SeeAlso: AX=F0F1h
--------a-14F0F1DX0000-----------------------
INT 14 - ASAP v1.0 - INSTALLATION CHECK
        AX = F0F1h
        DX = 0000h
Return: DX = segment of resident code
            0000h if not installed
Program: ASAP (Automatic Screen Access Program) is a shareware screen reader
          by MicroTalk
SeeAlso: AX=F0F0h,INT 10/AX=3800h
--------S-14F4FF-----------------------------
INT 14 - IBM/Yale EBIOS SERIAL I/O - INSTALLATION CHECK
        AX = F4FFh
        DX = port (00h-03h)
Return: CF clear if present
            AX = 0000h
        CF set if not present
            AX <> 0000h
SeeAlso: AH=36h"ComShare",AH=F9h,AH=FCh
--------S-14F9-------------------------------
INT 14 - IBM/Yale EBIOS SERIAL I/O - REGAIN CONTROL
        AH = F9h
        DX = port (00h-03h)
Return: nothing
SeeAlso: AX=F4FFh
--------S-14FA-------------------------------
INT 14 - IBM/Yale EBIOS SERIAL I/O - SEND BREAK
        AH = FAh
        DX = port (00h-03h)
Return: nothing
SeeAlso: AH=07h"MBBIOS",AH=1Ah,AH=8Ah
--------S-14FB-------------------------------
INT 14 - IBM/Yale EBIOS SERIAL I/O - SET OUTGOING MODEM SIGNALS
        AH = FBh
        AL = modem control register (see #00334 at AH=05h"SERIAL")
        DX = port (00h-03h)
Return: nothing
SeeAlso: AH=05h"SERIAL"
--------S-14FC-------------------------------
INT 14 - IBM/Yale EBIOS SERIAL I/O - READ CHARACTER, NO WAIT
        AH = FCh
        DX = port (00h-03h)
Return: AH = RS232 status bits (see #00304 at AH=03h)
        AL = character
SeeAlso: AH=02h,AH=0Ch,AX=FF02h
--------S-14FD02-----------------------------
INT 14 - IBM/Yale EBIOS SERIAL I/O - READ STATUS
        AX = FD02h
Return: CX = number of characters available
--------N-14FF00-----------------------------
INT 14 - TelAPI - "telcheck" - INSTALLATION CHECK
        AX = FF00h
Return: AX = 00FFh if installed
            BX = version number * 100 (decimal)
SeeAlso: AH=E6h,AX=F4FFh
--------S-14FF01-----------------------------
INT 14 - IBM/Yale EBIOS SERIAL I/O - SET SEND BUFFER
        AX = FF01h
        CX = length of buffer (0000h to cancel buffer assignment)
        DX = port (00h-03h)
        ES:BX -> send buffer
Return: nothing
SeeAlso: AH=18h,AH=83h"COURIERS",AH=A5h"BAPI",AH=FCh,AX=FF02h
--------S-14FF02-----------------------------
INT 14 - IBM/Yale EBIOS SERIAL I/O - SET RECEIVE BUFFER
        AX = FF02h
        CX = length of buffer (0000h to cancel buffer assignment)
        DX = port (00h-03h)
        ES:BX -> receive buffer
Return: nothing
SeeAlso: AH=18h,AH=83h"COURIERS",AH=A5h"BAPI",AH=FCh,AX=FF01h
--------S-14FFF8-----------------------------
INT 14 - COMM-DRV v14.0 - SET BAUD RATE DIVISOR
        AX = FFF8h
        BX = card type (sub-device number)
        CX = new baudrate divisor
        DX = index to baud rate
Return: AH bit 7 set on error
        AH bit 7 clear if successful
Program: COMM-DRV is a universal serial communications driver by Willies'
          Computer Software Company, which supports standard INT 14 and
          FOSSIL calls as well as its own interfaces
SeeAlso: AX=8000h"COMM-DRV"
--------S-14FFFB-----------------------------
INT 14 - COMM-DRV v14.0 - GET HIGHEST ALLOWED PORT NUMBER
        AX = FFFBh
        DX = port number
Return: AH bit 7 set on error
        AH bit 7 clear if successful
            BX = highest port number
--------S-14FFFC-----------------------------
INT 14 - COMM-DRV v14.0 - GET INT 14 FLAGS
        AX = FFFCh
        DX = port number
Return: AH bit 7 set on error
        AH bit 7 clear if successful
            BX = flags (see #00403)
SeeAlso: AX=FFFDh

Bitfields for INT 14h flags:
Bit(s)  Description     (Table 00403)
 0      port active for INT 14h
 1      interface behaving like a FOSSIL driver
--------S-14FFFD-----------------------------
INT 14 - COMM-DRV v14.0 - SET INT 14 FLAGS
        AX = FFFDh
        BX = flags (see #00403)
        DX = port number
Return: AH bit 7 set on error
        AH bit 7 clear if successful
SeeAlso: AX=FFFCh
--------S-14FFFE-----------------------------
INT 14 - COMM-DRV v14.0 - RESTORE INT 14 VECTOR TO ORIGINAL
        AX = FFFEh
Return: AH bit 7 set on error
        AH bit 7 clear if successful
--------S-14FFFF-----------------------------
INT 14 - COMM-DRV v14.0 - GET INT 14 INFORMATION AREA
        AX = FFFFh
        BX:SI -> DWORD buffer for address of information area (see #00404)
                  (initialized to zeros)
Return: BX:SI buffer filled with nonzero value if installed
Program: COMM-DRV is a universal serial communications driver by Willies'
          Computer Software Company, which supports standard INT 14 and
          FOSSIL calls as well as its own interfaces
Index:  installation check;COMM-DRV

Format of COMM-DRV information area:
Offset  Size    Description     (Table 00404)
 00h  8 BYTEs   signature "COMM-DRV"
 08h  2 BYTEs   00h,00h
 0Ah    DWORD   -> direct address mapping table
 0Eh    DWORD   previous INT 14 vector
--------t-15---------------------------------
INT 15 - Microsoft TSR Specification
        No additional information available at this time.
--------B-1500-------------------------------
INT 15 - CASSETTE - TURN ON TAPE DRIVE'S MOTOR (PC and PCjr only)
        AH = 00h
Return: CF set on error
            AH = 86h no cassette present
        CF clear if successful
SeeAlso: AH=01h"CASSETTE",MEM 0040h:0067h"PC"
--------M-1500-------------------------------
INT 15 - Amstrad PC1512 - GET AND RESET MOUSE COUNTS
        AH = 00h
Return: CX = signed X count
        DX = signed Y count
--------O-1500-------------------------------
INT 15 - VMiX v2+ - INSTALLATION CHECK
        AH = 00h
Return: DX = 0798h if installed
            AX = version (AH = major, AL = minor)
--------T-1500-------------------------------
INT 15 - MultiDOS Plus - GIVE UP TIME SLICE
        AH = 00h
Return: nothing
Note:   if issued by the highest-priority task while MultiDOS is using
          priority-based rather than round-robin scheduling, control will be
          returned to the caller immediately
SeeAlso: AH=03h"MultiDOS",AX=1000h
--------B-1501-------------------------------
INT 15 - CASSETTE - TURN OFF TAPE DRIVE'S MOTOR (PC and PCjr only)
        AH = 01h
Return: CF set on error
            AH = 86h no cassette present
        CF clear if successful
SeeAlso: AH=00h"CASSETTE"
--------b-1501-------------------------------
INT 15 - Amstrad PC1512 - WRITE DATA TO NON-VOLATILE RAM
        AH = 01h
        AL = NVRAM location (00h to 3Fh) (see #00405)
        BL = NVRAM data value
Return: AH = return code
            00h OK
            01h address bad
            02h write error
SeeAlso: AH=02h"Amstrad"

Format of Amstrad NVRAM:
Offset  Size    Description     (Table 00405)
 00h    BYTE    time of day: seconds
 01h    BYTE    alarm time: seconds
 02h    BYTE    time of day: minutes
 03h    BYTE    alarm time: minutes
 04h    BYTE    time of day: hours
 05h    BYTE    alarm time: hours
 06h    BYTE    day of week, 1 = Sunday
 07h    BYTE    day of month
 08h    BYTE    month
 09h    BYTE    year mod 100
 0Ah    BYTE    RTC status register A (see #00406)
 0Bh    BYTE    RTC status register B (see #00407)
 0Ch    BYTE    RTC status register C (read-only) (see #00408)
 0Dh    BYTE    RTC status register D
                bit 7: battery good
 0Eh  6 BYTEs   time and date machine last used
 14h    BYTE    user RAM checksum
 15h    WORD    Enter key scancode/ASCII code
 17h    WORD    Forward delete key scancode/ASCII code
 19h    WORD    Joystick fire button 1 scancode/ASCII code
 1Bh    WORD    Joystick fire button 2 scancode/ASCII code
 1Dh    WORD    mouse button 1 scancode/ASCII code
 1Fh    WORD    mouse button 2 scancode/ASCII code
 21h    BYTE    mouse X scaling factor
 22h    BYTE    mouse Y scaling factor
 23h    BYTE    initial VDU mode and drive count
 24h    BYTE    initial VDU character attribute
 25h    BYTE    size of RAM disk in 2K blocks
 26h    BYTE    initial system UART setup byte
 27h    BYTE    initial external UART setup byte
 28h 24 BYTEs   available for user application
Note:   bytes 00h-0Dh are the same on the IBM AT as they are used/updated by
          the clock chip

Bitfields for RTC status register A:
Bit(s)  Description     (Table 00406)
 7      set if date/time being updated
 6-4    time base speed, default 010 = 32768 Hz
 3-0    interrupt rate selection, default 0110 = 1024 Hz
SeeAlso: #00405

Bitfields for RTC status register B:
Bit(s)  Description     (Table 00407)
 7      clear if normal update, set if abort update
 6      periodic interrupt enable
 5      alarm interrupt enable
 4      update end interrupt enable
 3      square wave enable
 2      date mode (clear = BCD, set = binary)
 1      24-hour format
 0      daylight saving time enable
SeeAlso: #00405

Bitfields for RTC status register C:
Bit(s)  Description     (Table 00408)
 7      IRQF flag
 6      PF flag
 5      AF flag
 4      UF flag
SeeAlso: #00405
--------O-1501-------------------------------
INT 15 - VMiX - "sys_chanreq" - I/O CHANNEL OBJECT MANAGER
        AH = 01h
        STACK:  WORD    object ID of requestor
                DWORD   pointer to ASCIZ name of requested method
                        "assign" assign channel to object
                        "deassign" deassign channel
                        "cursor" set cursor on/off
                        "init" initialize comm port
                        "open" open I/O channel
                        "position" set cursor position
                        "receive" get buffered packet from comm port
                        "send" send buffered packet to comm port
                        "vio" set current virtual I/O to specified channel
                        "window" make window at cursor position
                ---if "assign"---
                 WORD   object UID
                 WORD   caller UID/PID
                 DWORD  CSL with port
                ---if "deassign"---
                 WORD   channel ID
                ---if "cursor"---
                 WORD   channel ID (must be a SRCSINK)
                 WORD   new state (0000h off, 0001h on)
                ---if "init"---
                 WORD   channel ID (must be a SRCSINK)
                 WORD   comm port number (00h-03h)
                 WORD   UART init code
                ---if "open"---
                 WORD   channel ID
                ---if "position"---
                 WORD   channel ID (must be a SRCSINK)
                 WORD   position (high byte = row, low byte = column)
                ---if "receive"---
                 DWORD  pointer to buffer
                ---if "send"---
                 WORD   length of buffer
                 DWORD  pointer to buffer
                ---if "vio"---
                 WORD   channel ID (must be a SRCSINK)
                ---if "window"---
                 WORD   top left (high byte = row, low byte = column)
                 WORD   bottom right (high byte = row, low byte = column)
Return: DX:AX -> IRP structure or 0000h:0000h
SeeAlso: AH=00h"VMiX",AH=02h"VMiX"
--------T-1501-------------------------------
INT 15 - MultiDOS Plus - REQUEST RESOURCE SEMAPHORE
        AH = 01h
        AL = semaphore number (00h-3Fh)
Return: AH = status
            00h successful
            02h invalid semaphore number
Notes:  if the semaphore is not owned, ownership is assigned to the calling
          task and the call returns immediately
        if the semaphore is already owned by another task, the calling task
          is placed on a queue for the semaphore and suspended until it can
          become owner of the semaphore
        semaphore 0 is used internally by MultiDOS to synchronize DOS access
SeeAlso: AH=02h"MultiDOS",AH=10h"MultiDOS",AH=1Bh"MultiDOS"
--------B-1502-------------------------------
INT 15 - CASSETTE - READ DATA (PC and PCjr only)
        AH = 02h
        CX = number of bytes to read
        ES:BX -> buffer
Return: CF clear if successful
            DX = number of bytes read
            ES:BX -> byte following last byte read
        CF set on error
        AH = status (see #00409)
SeeAlso: AH=00h"CASSETTE",AH=03h"CASSETTE",MEM 0040h:0069h,MEM 0040h:006Bh"PC"

(Table 00409)
Values for Cassette status:
 00h    successful
 01h    CRC error
 02h    bad tape signals
 04h    no data
 80h    invalid command
 86h    no cassette present
--------b-1502-------------------------------
INT 15 - Amstrad PC1512 - READ DATA FROM NON-VOLATILE RAM
        AH = 02h
        AL = NVRAM location (00h to 3Fh)
Return: AH = return code
            00h OK
            01h address bad
            02h checksum error
        AL = NVRAM data value
SeeAlso: AH=01h"Amstrad"
--------O-1502-------------------------------
INT 15 - VMiX - "sys_memreq" - MEMORY OBJECT MANAGER
        AH = 02h
        STACK:  WORD    object ID of requestor
                DWORD   pointer to ASCIZ name of requested method
                        "assign" allocate low memory block
                        "assign extended" allocate extended memory pages
                        "assign gdt" allocate GDT selector
                        "paged" allocate low paged memory
                        "paged extended" alllocate extended memory pages
                        "deassign" free memory block
                        "deassign gdt" free GDT selector
                        "getvpage" get physical address for virtual page
                        "setvpage" set physical address for virtual page
                        "info" get VMiX memory usage info block
                        "move" move contents of 32-bit memory
                        "newmcb" make new DOS memory control block
                        "owner" get process ID of MCB or PSP owner
                        "umb" allocate upper memory block
                        "video" toggle system use of video memory and get stat
                ---if "assign"---
                 WORD   number of objects
                 WORD   size in bytes (multiple of 512 bytes)
                ---if "assign extended"---
                 WORD   number of objects
                 WORD   size in bytes (multiple of 4K)
                ---if "assign gdt"---
                 WORD   access type (low byte)
                 WORD   segment size in paragraphs
                 DWORD  pointer to start of physical segment
                ---if "paged"---
                 WORD   number of 512-byte pages
                ---if "paged extended"
                 WORD   number of 4K pages
                ---if "deassign"---
                 DWORD  pointer returned by previous allocation call
                ---if "deassign gdt"---
                 WORD   GDT selector
                ---if "getvpage"---
                 WORD   owner's process ID
                 DWORD  pointer to buffer for page structure (struct VPGE)
                ---if "setvpage"---
                 WORD   owner's process ID
                 DWORD  pointer to new page structure (struct VPGE)
                ---if "info"---
                 no additional arguments
                ---if "move"
                 DWORD  32-bit source address
                 DWORD  32-bit destination address
                 WORD   number of words to move
                ---if "newmcb"---
                 DWORD  pointer to new MCB's location
                 WORD   size of memory block
                 DWORD  pointer to ASCIZ name string (max 8 chars)
                ---if "owner"---
                 WORD   MCB or PSP segment
                ---if "umb"---
                 WORD   size in paragraphs
                ---if "video"---
                 no additional arguments
Return: DX:AX -> memory block or VPGE struct or 0000h:0000h
SeeAlso: AH=00h"VMiX",AH=01h"VMiX"
--------T-1502-------------------------------
INT 15 - MultiDOS Plus - RELEASE RESOURCE SEMAPHORE
        AH = 02h
        AL = semaphore number (00h-3Fh)
Return: AH = status
            00h successful
            01h not semaphore owner
            02h invalid semaphore number
Notes:  if any tasks are waiting for the semaphore, the first task on the wait
          queue will become the new owner and be reawakened
        do not use within an interrupt handler
SeeAlso: AH=01h"MultiDOS",AH=10h"MultiDOS",AH=1Ch"MultiDOS"
--------B-1503-------------------------------
INT 15 - CASSETTE - WRITE DATA (PC and PCjr only)
        AH = 03h
        CX = number of bytes to write
        ES:BX -> data buffer
Return: CF clear if successful
            ES:BX -> byte following last byte written
        CF set on error
        AH = status (see #00409)
        CX = 0000h
SeeAlso: AH=00h"CASSETTE",AH=02h"CASSETTE"
--------V-1503-------------------------------
INT 15 - Amstrad PC1512 - WRITE VDU COLOR PLANE WRITE REGISTER
        AH = 03h
        AL = value (I,R,G,B bits)
Return: nothing
SeeAlso: AH=04h"Amstrad"
--------O-1503-------------------------------
INT 15 - VMiX - "sys_pinput" - PROMPTED CONSOLE INPUT
        AH = 03h
        STACK:  DWORD   pointer to ASCII prompt
                WORD    field outline character
                WORD    length of input field (max 7Fh)
                DWORD   address of pointer to input buffer
Return: AX = length of input (input buffer is padded with blanks)
SeeAlso: AH=04h"VMiX"
--------T-1503-------------------------------
INT 15 - MultiDOS Plus - SUSPEND TASK FOR INTERVAL
        AH = 03h
        DX = number of time slices to remain suspended
Return: after specified interval has elapsed
Note:   when priority-based scheduling is in use, high-priority tasks should
          use this function to yield the processor
SeeAlso: AH=00h"MultiDOS",AH=0Ah"MultiDOS"
--------B-1504-------------------------------
INT 15 - SYSTEM - BUILD ABIOS SYSTEM PARAMETER TABLE (PS)
        AH = 04h
        ES:DI -> 32-byte results buffer for System Parameter Table (see #00410)
        DS = segment containing ABIOS RAM extensions (zero if none)
Return: CF clear if successful
            AH = 00h success
            ES:DI buffer filled
            AL destroyed
        CF set on failure
            AX destroyed
            AH = 80h/86h if not supported
SeeAlso: AH=05h"ABIOS",AH=C1h

Format of ABIOS System Parameter Table:
Offset  Size    Description     (Table 00410)
 00h    DWORD   FAR address of ABIOS Common Start Routine
 04h    DWORD   FAR address of ABIOS Interrupt Routine
 08h    DWORD   FAR address of ABIOS Time-out Routine
 0Ch    WORD    number of bytes of stack required by this ABIOS implementation
 0Eh 16 BYTEs   reserved
 1Eh    WORD    number of entries in initialization table
--------V-1504-------------------------------
INT 15 - Amstrad PC1512 - WRITE VDU COLOR PLANE READ REGISTER
        AH = 04h
        AL = value (RDSEL1 and RDSEL0)
Return: nothing
SeeAlso: AH=03h"Amstrad",AH=05h"Amstrad"
--------O-1504-------------------------------
INT 15 - VMiX - "sys_vprintf" - FORMATTED OUTPUT TO STREAM
        AH = 04h
        STACK:  DWORD   control string
                DWORD   array of arguments
Return: nothing
SeeAlso: AH=03h"VMiX"
--------T-1504-------------------------------
INT 15 - MultiDOS Plus - SEND MESSAGE TO ANOTHER TASK
        AH = 04h
        AL = mailbox number (00h-3Fh)
        CX = message length in bytes
        DS:SI -> message
Return: AH = status
            00h successful
            01h out of message memory
            02h invalid mailbox number
Note:   the message is copied into a system buffer; the caller may immediately
          reuse its buffer
SeeAlso: AH=05h"MultiDOS"
--------B-1505-------------------------------
INT 15 - SYSTEM - BUILD ABIOS INITIALIZATION TABLE (PS)
        AH = 05h
        ES:DI -> results buffer of length 18h * Number_of_Entries (see #00411)
        DS = segment containing ABIOS RAM extensions (zero if none)
Return: CF clear if successful
            AH = 00h success
            ES:DI buffer filled
            AL destroyed
        CF set on failure
            AX destroyed
            AH = 80h/86h if not supported
SeeAlso: AH=04h"ABIOS",AH=C1h

Format of one entry of ABIOS Initialization Table:
Offset  Size    Description     (Table 00411)
 00h    WORD    device ID (see #00412)
 02h    WORD    number of Logical IDs
 04h    WORD    Device Block length (zero for ABIOS patch or extension)
 06h    DWORD   -> init routine for Device Block and Function Transfer Table
 0Ah    WORD    request block length
 0Ch    WORD    Function Transfer Table length (zero for a patch)
 0Eh    WORD    Data Pointers length (in Common Data Area)
 10h    BYTE    secondary device ID (hardware level this ABIOS ver supports)
 11h    BYTE    revision (device driver revision level this ABIOS supports)
 12h  6 BYTEs   reserved

(Table 00412)
Values for ABIOS device ID:
 00h    ABIOS internal calls
 01h    floppy disk
 02h    hard disk
 03h    video
 04h    keyboard
 05h    parallel port
 06h    serial port
 07h    system timer
 08h    real-time clock
 09h    system services
 0Ah    NMI
 0Bh    mouse
 0Eh    CMOS RAM
 0Fh    DMA
 10h    Programmable Option Select (POS)
 16h    keyboard password
--------V-1505-------------------------------
INT 15 - Amstrad PC1512 - WRITE VDU GRAPHICS BORDER REGISTER
        AH = 05h
        AL = value (I,R,G,B bits)
Return: nothing
SeeAlso: AH=04h"Amstrad"
--------O-1505-------------------------------
INT 15 - VMiX - "sys_getpid" - GET PROCESS ID OF CURRENT PROCESS
        AH = 05h
Return: AX = process ID
SeeAlso: AH=06h"VMiX",AH=0Bh"VMiX"
--------T-1505-------------------------------
INT 15 - MultiDOS Plus - CHECK MAILBOX
        AH = 05h
        AL = mailbox number (00h-3Fh)
Return: AH = status
            00h successful
                DX = length of first message in queue, 0000h if no message
            02h invalid mailbox number
SeeAlso: AH=04h"MultiDOS",AH=06h"MultiDOS"
--------b-1506-------------------------------
INT 15 - Amstrad PC1512 - GET ROS VERSION NUMBER
        AH = 06h
Return: BX = version number
--------O-1506-------------------------------
INT 15 - VMiX - "sys_getpcb" - GET POINTER TO PROCESS CONTROL BLOCK
        AH = 06h
        STACK:  WORD    process ID
Return: DX:AX -> process control block
SeeAlso: AH=05h"VMiX",AH=07h"VMiX",AH=08h"VMiX"
--------T-1506-------------------------------
INT 15 - MultiDOS Plus - READ MAILBOX
        AH = 06h
        AL = mailbox number (00h-3Fh)
        CX = size of buffer in bytes
        ES:DI -> buffer for message
Return: AH = status
            00h successful
                CX = number of bytes copied
                DX = actual length of message
            02h invalid mailbox number
Note:   if the caller's buffer is not large enough, the message is truncated
          and the remainder is lost
SeeAlso: AH=04h"MultiDOS",AH=05h"MultiDOS"
--------O-1507-------------------------------
INT 15 - VMiX - "sys_getocb" - GET POINTER TO OBJECT CONTROL BLOCK
        AH = 07h
        STACK:  WORD    object type
Return: DX:AX -> object control block
SeeAlso: AH=06h"VMiX",AH=08h"VMiX"
----------1507-------------------------------
INT 15 - IBM SurePath BIOS - Officially "Private" Function
        AH = 07h
SeeAlso: AH=08h"IBM"
--------T-1507-------------------------------
INT 15 - MultiDOS Plus - SPAWN INTERNAL TASK (CREATE NEW THREAD)
        AH = 07h
        BX:CX = entry point of new task
        DX = stack size in paragraphs
Return: AH = status
            00h successful
            01h no free task control blocks
            02h no free memory for task's stack
Note:   execution returns immediately to calling task
SeeAlso: AH=08h"MultiDOS",AH=09h"MultiDOS",AH=13h"MultiDOS"
--------O-1508-------------------------------
INT 15 - VMiX - "sys_getccb" - GET CHANNEL CONTROL BLOCK
        AH = 08h
        STACK:  WORD    channel ID
Return: DX:AX -> channel control block
SeeAlso: AH=06h"VMiX",AH=07h"VMiX"
--------B-1508-------------------------------
INT 15 - IBM SurePath BIOS - WAIT REQUESTED TIME PERIOD
        AH = 08h
        AL = function
            00h wait in increments of 15.025 microseconds
                CX = number of time increments to wait (0000h = maximum)
            80h wait in increments of 840 ns
                ECX = number of time increments to wait
            81h I/O event wait
                BH = bitmask of bits to check
                BL = expected pattern
                DX = I/O port address
                ECX = number of 840 ns microticks to wait
                Return: ECX = 00000000h if expected pattern did not occur
            82h memory event wait
                BH = bitmask of bits to check
                BL = expected pattern
                ES:SI -> BYTE to check
                ECX = number of 840 ns microticks to wait
                Return: ECX = 00000000h if expected pattern did not occur
            other reserved
Return: CF clear if successful
        CF set on error
        AH = status
            00h successful
            01h used 15.025 microsecond interval, time rounded up
            08h reserved subfunction
            86h function not supported
Notes:  IBM classifies this function as optional
        if the POST determines that the timer is nonfunctional, this function
          uses the 15.025 microsecond refresh timer instead of the
          full-resolution timer
SeeAlso: AH=07h"IBM",AH=09h"IBM",AH=86h
--------T-1508-------------------------------
INT 15 - MultiDOS Plus - TERMINATE INTERNAL TASK (KILL THREAD)
        AH = 08h
Return: calling task terminated, so execution never returns to caller
Notes:  an internal task must be terminated with this function rather than a
          DOS termination function
        task's stack space is returned to parent task's memory pool
SeeAlso: AH=07h"MultiDOS"
--------O-1509-------------------------------
INT 15 - VMiX - "sys_getqueue" - GET ID OF QUEUED ELEMENT
        AH = 09h
        STACK:  WORD    queue ID (0 = process queue, 1 = object, 3 = type)
                WORD    subqueue ID
Return: AX = queue ID
SeeAlso: AH=0Ah"VMiX"
----------1509-------------------------------
INT 15 - IBM BIOS - RESERVED FOR PCMCIA SYSTEM RESOURCE TABLE ACCESS
        AH = 09h
        no further details available
SeeAlso: AH=08h"IBM"
--------T-1509-------------------------------
INT 15 - MultiDOS Plus - CHANGE TASK'S PRIORITY
        AH = 09h
        AL = new priority
Return: nothing
Note:   the priority has different meanings depending on whether priority-
          based or round-robin scheduling is used
SeeAlso: AH=07h"MultiDOS"
--------O-150A-------------------------------
INT 15 - VMiX - "sys_qetqnext" - GET ID OF NEXT QUEUED ELEMENT
        AH = 0Ah
        STACK:  WORD    queue ID (0 = process queue, 1 = object, 3 = type)
                WORD    ID of current element in queue chain
Return: AX = ID of next element
SeeAlso: AH=09h"VMiX",AH=0Fh"VMiX"
--------T-150A-------------------------------
INT 15 - MultiDOS Plus - CHANGE TIME SLICE INTERVAL
        AH = 0Ah
        AL = new interval
            00h = 55.0 ms (default)
            80h = 27.5 ms
            40h = 13.75 ms
            20h = 6.88 ms
            10h = 3.44 ms
            08h = 1.72 ms
SeeAlso: AH=03h"MultiDOS"
--------O-150B-------------------------------
INT 15 - VMiX - "sys_sysreq" - SYSTEM CONFIGURATION MANAGER
        AH = 0Bh
        STACK:  WORD    caller's UID
                DWORD   pointer to ASCIZ name of requested method
                        "abort" abort current send/receive on comm port
                        "block" start/end critical section
                        "close" terminate interrupt-drive comm I/O
                        "open" prepare comm port for interrupt-driven I/O
                        "delay" set delay timer and wait
                        "hibernate" put process to sleep
                        "ints" enable/disable interrupt-driven INT 14h
                        "length" get current send/receive buffer offsets
                        "kswitch" switch stacks
                        "numproc" get number of active processes
                        "protocol" set protocol function for comm interrupts
                        "relocate" set/reset VMiX flag for relocating to himem
                        "status" get current open comm port status
                        "wake" awaken a process
                        "xport" get comm port polled for logins
                ---if "abort"---
                 no additional arguments
                ---if "block"---
                 WORD   0000h end, 0001h start
                ---if "close"---
                 no additional arguments
                ---if "open"---
                 WORD   comm port (00h-03h)
                 WORD   BIOS parameter byte (see #00300 at INT 14/AH=00h),
                        except bits 7-5: 000 = 19200, 001 = 38400, 011 = 115200
                ---if "delay"---
                 WORD   time in seconds
                ---if "hibernate"---
                 WORD   process ID
                ---if "ints"---
                 WORD   0000h if no, 0001h if yes
                ---if "length","numproc","relocate","status","xport"---
                 no additional arguments
                ---if "kswitch"---
                 DWORD  pointer to new stack
                ---if "protocol"---
                 DWORD  pointer to function (must be in low "assign"ed memory
                        when in 386 mode)
                ---if "wake"---
                 WORD   process ID
Return: DX:AX -> result or 0000h:0000h
                ---if "length"---
                 BYTE   receive offset
                 BYTE   send offset
                ---if "kswitch"---
                 DWORD  old stack pointer
                ---if "numproc"---
                 WORD   number of active processes
                ---if "status"---
                 current open comm port status
                ---if "xport"---
                 current comm port being polled for logins
Note:   the "delay" command reportedly disables the keyboard until the delay
          completes
SeeAlso: AH=05h"VMiX",AH=0Eh"VMiX"
--------T-150B-------------------------------
INT 15 - MultiDOS Plus - FORCE DISPLAY OUTPUT TO PHYSICAL SCREEN MEMORY
        AH = 0Bh
Return: nothing
Notes:  sets calling task's screen pointer to actual screen memory; the pointer
          may be restored with AH=0Ch
        caller's video mode must be same as foreground task's video mode
        any text written while in the background will be saved to the
          foreground task's virtual screen when it switches to the background
        useful if a background task wants to display a message on the
          foreground screen
SeeAlso: AH=0Ch"MultiDOS"
--------O-150C-------------------------------
INT 15 - VMiX - "sys_getstack" - GET POINTER TO PROCESS TSS STACK
        AH = 0Ch
        STACK:  WORD    process ID
Return: DX:AX -> TSS stack store
SeeAlso: AH=00h"VMiX"
--------T-150C-------------------------------
INT 15 - MultiDOS Plus - RESTORE OLD VIDEO DISPLAY MEMORY
        AH = 0Ch
Return: nothing
Note:   restores task's screen pointer saved by AH=0Bh; must not be called
          unless AH=0Bh has been called first
SeeAlso: AH=0Bh"MultiDOS"
--------O-150D-------------------------------
INT 15 - VMiX - "sys_spawn" - START A CHILD PROCESS JOB SHELL
        AH = 0Dh
        STACK:  DWORD   ASCIZ string starting with requested I/O channel and
                        followed by standard VMiX shell command string
Return: AX = process ID or error code "SYS_ERROR"
Note:   the maximum string length is 7Fh characters
SeeAlso: AH=0Eh"VMIX",AH=11h"VMiX",INT 21/AH=4Bh
--------T-150D-------------------------------
INT 15 - MultiDOS Plus - DISABLE MULTITASKING
        AH = 0Dh
Return: nothing
Note:   calling task receives all time slices until AH=0Eh is called; this
          allows time-critical events or nonreentrant code to be processed
SeeAlso: AH=0Eh"MultiDOS",AH=10h"MultiDOS",AX=101Bh,AH=20h"MultiDOS"
--------O-150E-------------------------------
INT 15 - VMiX - "sys_kill" - HARD TERMINATE PROCESS
        AH = 0Eh
        STACK:  WORD    process ID
Return: AX = status (SYS_OK or SYS_ERROR)
SeeAlso: AH=0Bh"VMiX",AH=0Dh"VMIX"
--------T-150E-------------------------------
INT 15 - MultiDOS Plus - ENABLE MULTITASKING
        AH = 0Eh
Return: nothing
SeeAlso: AH=0Dh"MultiDOS",AX=101Ch,AH=20h"MultiDOS"
--------d-150F-------------------------------
INT 15 C - SYSTEM - FORMAT UNIT PERIODIC INTERRUPT (PS ESDI drives only)
        AH = 0Fh
        AL = phase code
            00h reserved
            01h surface analysis
            02h formatting
Return: CF clear if formatting should continue
        CF set if formatting should terminate
Note:   called during ESDI drive formatting after each cylinder is completed
SeeAlso: INT 13/AH=1Ah
--------O-150F-------------------------------
INT 15 - VMiX - "sys_getqkey" - GET KEY FIELD OF QUEUED ELEMENT
        AH = 0Fh
        STACK:  WORD    queue ID (0 = process queue, 1 = object q, 3 = type q)
                WORD    ID of element in queue chain
Return: AX = key
SeeAlso: AH=0Ah"VMiX"
--------T-150F-------------------------------
INT 15 - MultiDOS Plus - EXECUTE A MULTIDOS PLUS COMMAND
        AH = 0Fh
        DS:BX -> ASCIZ command
Return: after command has been processed
Notes:  specified string is executed as if it had been typed at the MultiDOS
          command prompt
        the task is placed on a queue which MultiDOS examines periodically and
          is suspended until MultiDOS has processed the command
        all lowercase characters up to the first blank are converted to upper
          case within the given buffer
--------!---Section--------------------------
Interrupt List, part 3 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------O-1510-------------------------------
INT 15 - VMiX - "sys_virtual" - EXECUTE CONFORMING FUNCTION IN PROTECTED MODE
        AH = 10h
        STACK:  DWORD   pointer to function
              N WORDs   function args
Return: AX = function's return value??? (not specified in documentation)
Note:   while the function is executing, the following global descriptors are
          available:
                20h stack segment
                38h code segment of function
                40h data alias for function's code segment
          additional GDT descriptors can be allocated using AH=02h with
          function "assign gdt"
SeeAlso: AH=02h"VMiX",AH=51h"VMiX"
--------T-1510-------------------------------
INT 15 - MultiDOS Plus - TEST RESOURCE SEMAPHORE
        AH = 10h
        AL = semaphore number (00h-3Fh)
Return: AH = status
            00h semaphore not in use
            01h semaphore owned by another task
            02h invalid semaphore number
            03h semaphore owned by caller
SeeAlso: AH=02h"MultiDOS",AH=0Dh"MultiDOS",AH=1Dh"MultiDOS"
--------Q-151000-----------------------------
INT 15 - TopView - "PAUSE" - GIVE UP CPU TIME
        AX = 1000h
Return: after other processes run
Note:   under DESQview, if the process issuing this call has hooked INT 08h,
          the current time-slice is set to expire at the next clock tick rather
          than immediately
SeeAlso: AH=00h"MultiDOS",AX=5305h,INT 21/AH=89h,INT 21/AH=EEh"DoubleDOS"
SeeAlso: INT 2F/AX=1680h,INT 60/DI=0106h,INT 62/AH=01h,INT 6F/AH=2Ah"F_YIELD"
SeeAlso: INT 7A/BX=000Ah,INT 7F/AH=02h"MultiLink",INT 7F/AH=E8h
--------Q-151001-----------------------------
INT 15 - TopView - "GETMEM" - ALLOCATE "SYSTEM" MEMORY
        AX = 1001h
        BX = number of bytes to allocate
Return: ES:DI -> block of memory or 0000h:0000h (DV v2.26+)
        AX = status (DV v2.42)
            0000h successful
            0001h failed
Note:   use SETERROR (AX=DE15h) to avoid a user prompt if there is insufficient
          common memory.  Under DV v2.42, this call never generates a user
          prompt regardless of the SETERROR value; instead, it always returns
          AX=0001h and ES:DI=0000h:0000h if out of memory
SeeAlso: AX=1002h,AX=102Eh,AX=DE0Ch,AX=DE15h
--------Q-151002-----------------------------
INT 15 - TopView - "PUTMEM" - DEALLOCATE "SYSTEM" MEMORY
        AX = 1002h
        ES:DI -> previously allocated block
Return: block freed
SeeAlso: AX=1001h,AX=DE0Dh
--------Q-151003-----------------------------
INT 15 - TopView - "PRINTC" - DISPLAY CHARACTER/ATTRIBUTE ON SCREEN
        AX = 1003h
        BH = attribute
        BL = character
        DX = segment of object handle for window
Return: nothing
Note:   BX=0000h does not display anything, it only positions the hardware
          cursor to the logical cursor's current position
--------Q-1510-------------------------------
INT 15 - TopView - UNIMPLEMENTED IN DV 2.x
        AH = 10h
        AL = 04h thru 12h
Return: pops up "Programming error" window in DV 2.x
--------Q-151013-----------------------------
INT 15 - TopView - "GETBIT" - DEFINE A 2ND-LEVEL INTERRUPT HANDLER
        AX = 1013h
        ES:DI -> FAR service routine
Return: BX = bit mask indicating which bit was allocated
            0000h if no more bits available
SeeAlso: AX=1014h,AX=1015h
Note:   only a few TopView/DESQview API calls are allowed during a hardware
          interrupt; if other calls need to be made, the interrupt handler
          must schedule a 2nd-level interrupt with "SETBIT" (AX=1015h)
--------Q-151014-----------------------------
INT 15 - TopView - "FREEBIT" - UNDEFINE A 2ND-LEVEL INTERRUPT HANDLER
        AX = 1014h
        BX = bit mask from INT 15/AX=1013h
Return: nothing
SeeAlso: AX=1013h,AX=1015h
--------Q-151015-----------------------------
INT 15 - TopView - "SETBIT" - SCHEDULE ONE OR MORE 2ND-LEVEL INTERRUPTS
        AX = 1015h
        BX = bit mask for interrupts to post
Return: indicated routines will be called: (DV 2.0x) at next task switch
                                           (DV 2.2x) immediately on return from
                                                     hardware interrupt
Notes:  this is one of the few TopView calls which are allowed from a hardware
          interrupt handler
        the handler will be called with ES containing the segment of the handle
          of the next task to be executed; on return, ES must be the segment of
          a task handle
SeeAlso: AX=1013h,AX=1014h
--------Q-151016-----------------------------
INT 15 - TopView - "ISOBJ" - VERIFY OBJECT HANDLE
        AX = 1016h
        ES:DI = possible object handle
Return: BX = status
            FFFFh if ES:DI is a valid object handle (see #00414)
            0000h if ES:DI is not
Note:   under DESQview versions prior to 2.50, an object handle is always a
          pointer to the object; for versions 2.50 and up, only task handles
          are always pointers--other handles may consist of a unique object
          number and offset into DESQview's common memory (see #00423)
SeeAlso: AX=DE14h,AX=DE2Bh,AX=DE2Ch

(Table 00413)
Values for DESQview object type:
 00h    window/task
 01h    mailbox
 02h    keyboard
 03h    timer
 04h    pointer
 05h    panel
 06h    objectq

Format of DESQview object:
Offset  Size    Description     (Table 00414)
 00h    WORD    offset in common memory of previous object of same type
 02h    WORD    offset in common memory of next object of same type
 04h    WORD    signature FEDCh (DV 2.42-)
                signature FEDCh or object number (DV 2.50+)
 06h    WORD    object type (see #00413)
 08h    DWORD   object handle to return to caller
 0Ch    DWORD   canonicalized object address (segment = common memory)
 10h    WORD    offset in common memory of owning task
                (0000h for unowned OBJECTQs)
 12h    WORD    mapping context
                offset in common memory of mapping context record (see #00416)
        remainder varies by object type and DESQview version
---v2.42 keyboard object---
 14h    WORD    flag bits (see also AH=12h/BH=0Ah"OBJECT")
                bit 15: keyboard opened
 16h  4 BYTEs   ???
 1Ah    WORD    priority in OBJECTQ???
 1Ch    ...
 25h    WORD    offset in common memory of ??? task
 27h  4 BYTEs   ???
---v2.42 objectq object---
 14h    WORD    flag bits (see also AH=12h/BH=0Ah"OBJECT")
                bit 15: OBJECTQ opened
 16h  2 BYTEs   ???
 18h    WORD    offset in common memory of ??? task
 1Ah  6 BYTEs   ???
---v2.42 mailbox object---
 14h    WORD    flag bits (see also AH=12h/BH=0Ah"OBJECT")
                bit 15: mailbox opened
 1Ah    WORD    priority in OBJECTQ???
 1Ch  6 BYTEs   ???
 22h    WORD    offset in common memory of mailbox name (counted string)
                0000h if no name
    <= 5 BYTEs  ???
---v2.22-2.42,2.52,2.60 window/task object---
 14h    BYTE    00h window, 01h task
 15h    BYTE    internal (not Switch menu) window number???
 16h    BYTE    internal (not Switch menu) window number???
 17h    WORD    segment of internal window record (see #00417)
 19h  2 BYTEs   ???
 1Bh    BYTE    cursor row
 1Ch    BYTE    cursor column
 1Dh    BYTE    visible window origin, row
 1Eh    BYTE    visible window origin, column
 1Fh    BYTE    window height (logical)
 20h    BYTE    window width (logical)
 21h    BYTE    window position, row
 22h    BYTE    window position, column
 23h    BYTE    window height (visible)
 24h    BYTE    window width (visible)
 25h    BYTE    row of top of frame (or window if unframed)
 26h    BYTE    column of left of frame (or window if unframed)
 27h    BYTE    window height (physical, including frame)
 28h    BYTE    window width (physical, including frame)
 29h    BYTE    unzoomed visible origin, row (00h before first zoom)
 2Ah    BYTE    unzoomed visible origin, column (00h before first zoom)
 2Bh    BYTE    unzoomed window position, row (00h before first zoom)
 2Ch    BYTE    unzoomed window position, column (00h before first zoom)
 2Dh    BYTE    unzoomed window height (00h before first zoom)
 2Eh    BYTE    unzoomed window width (00h before first zoom)
                unzoomed parameters above are updated when window is zoomed
                  to full screen
 2Fh    BYTE    ??? initially logical window height
 30h    BYTE    ??? initially logical window width
 31h  2 BYTEs   ???
 33h    BYTE    minimum height of window
 34h    BYTE    minimum width of window
 35h    BYTE    maximum height of window
 36h    BYTE    maximum width of window
 37h  3 BYTEs   ???
 3Ah  8 BYTEs   window frame characters: ul,ur,ll,lr,t,b,l,r
 42h 24 BYTEs   attributes???
 5Ah  8 BYTEs   window frame characters: ul,ur,ll,lr,t,b,l,r
 62h  3 BYTEs   ???
 65h    BYTE    ??? bitflags
 66h    BYTE    bit 0: window is zoomed
 67h    BYTE    ???
 68h    WORD    offset in common memory of window name or 0000h if untitled
 6Ah    WORD    length of window name
 6Ch  2 BYTEs   ???
 6Eh    WORD    offset of logical cursor in window (in character cells)
 70h    DWORD   pointer to field table for window
 74h    BYTE    ???
 75h  2 BYTEs   ???
 77h    BYTE    number of last-visited field
 78h    DWORD   pointer to field table entry for last-visited field
 7Ch  3 BYTEs   ???
 7Fh    BYTE    select field marker character
 80h    BYTE    ??? bit flags
                bit 0: allow ECh window stream opcode to change reverse logattr
                bit 1: alternate field processing mode selected
 81h    BYTE    ???
 82h    DWORD   notification function (manager stream opcode 8Ah)
                no notification if segment = 0000h
 86h    DWORD   notification argument (manager stream opcode 8Bh)
 8Ah    WORD    offset in common memory of ??? window object or 0000h
 8Ch    WORD    offset in common memory of ??? window object or 0000h
 8Eh    WORD    offset in common memory of ??? window object or 0000h
 90h    BYTE    ??? bitflags
 91h    BYTE    ???
 ---task object only
 92h    BYTE    bit flags (bits 0-4)
 93h    BYTE    character for ??? (default 20h)
 94h    BYTE    ??? flag
 95h    WORD    offset in common memory of ???
 97h  2 BYTEs   ???
 99h    WORD    ???
 9Bh    BYTE    ??? bit flags
                bit 3: ???
                bit 6: perform protected-attribute processing on select fields
 9Ch    BYTE    ???
 9Dh    WORD    offset in common memory of current register save record
                  (see #00415). No register save record in use if < 01C0h
 9Fh    WORD    offset in common memory of task's keyboard object
 A1h    WORD    offset in common memory of task's OBJECTQ object
 A3h    WORD    offset in common memory of task's mailbox object
 A5h    WORD    semaphore: FFFFh if on user stack, else on task's private stack
 A7h    DWORD   user's SS:SP
 ABh    WORD    task's private SP (SS read from offset 0Ah)
 ADh  6 BYTEs   ???
 B3h    BYTE    ??? bit flags
                bit 0: run in foreground only
 B4h    BYTE    ???
 B5h    BYTE    ??? bitflags
 B6h    BYTE    task status (see #00555 at AX=DE2Ch)
 B7h  9 BYTEs   ???
 C0h    WORD    head pointer for keyboard buffer (wraps back to 00h after 80h)
 C2h    WORD    tail pointer for keyboard buffer (wraps back to 00h after 80h)
 C4h  2 BYTEs   ??? (0000h)
 C6h    WORD    segment of keyboard buffer for task
 C8h    WORD    offset in common memory of ??? keyboard object
 CAh    BYTE    ???
---v2.22-2.42
 CBh    WORD    offset in common memory of ??? object
 CEh    BYTE    ??? flag
 CFh    WORD    offset in common memory of default notify window for task
                  or 0000h if none
 D1h  4 BYTEs   ???
 D5h    BYTE    window number on Switch Window menu
 D6h  5 BYTEs   ???
 DBh    WORD    offset in common memory of ??? object
 DDh  2 BYTEs   ???
 DFh    WORD    API level for task
 E1h    WORD    offset in common memory of object task is waiting on if task
                  status is 'waiting', else 0000h
 E7h    WORD    segment of ???
 E9h 4  BYTEs   ???
 EDh    WORD    EMS handle of virtualization buffer, 0000h if no virtualization
 F1h 12 BYTEs   ???
 FBh    WORD    ???
 FDh    BYTE    ???
 FFh 12 BYTEs   ???
10Bh    DWORD   pointer to process record (see #00418,#00419)
10Dh 10 BYTEs   ???
119h    DWORD   SS:SP for ???
11Dh  4 BYTEs   ???
121h    DWORD   pointer to ???
125h 25 BYTEs   ???
13Eh    DWORD   pointer to ??? in system memory
---v2.22
142h  3 BYTEs   ???
145h            task's default keyboard object
---v2.42
142h    DWORD   pointer to first task instance data record in system memory
148h    DWORD   pointer to last task instance data record in system memory
                (see #00420)
14Ah    BYTE    ???
14Dh 42 BYTEs   task's default keyboard object
177h 32 BYTEs   task's ObjectQ object
197h 41 BYTEs   task's default mailbox object
1C0h 24 BYTEs   first register save record
450h    --      default top of private stack
---v2.52 (probably all DV/X)
Same as v2.60 below except there is an extra 29 bytes inserted somewhere
  before offset 9Fh, but not yet known exactly where.  Also, for the WAIT_ON
  field (v2.60 offset E3h), some X apps (probably waiting on a socket) have
  0000h even when waiting.
---v2.60
 CBh    WORD    ??? (added in 2.50 - rest is same as 2.42)
 CDh    WORD    offset in common memory of ??? object
 D0h    BYTE    ??? flag
 D1h    WORD    offset in common memory of default notify window for task
                  or 0000h if none
 D3h  4 BYTEs   ???
 D7h    BYTE    window number on Switch Window menu
 D8h  5 BYTEs   ???
 DDh    WORD    offset in common memory of ??? object
 DFh  2 BYTEs   ???
 E1h    WORD    API level for task
 E3h    WORD    If status at B6h=waiting, offset in common memory of object
                  that task is waiting on, else 0000h. (Task with CPU also
                  has 0000h here)
 E9h    WORD    segment of ???
 EBh 4  BYTEs   ???
 EFh    WORD    EMS handle of virtualization buffer, 0 if no virtualization
 F3h 12 BYTEs   ???
 FDh    WORD    ???
 FFh    BYTE    ???
101h  8 BYTEs   ???
109h    DWORD   pointer to process record in system memory
10Dh 14 BYTEs  ???
11Bh    DWORD   SS:SP for ???
11Fh  4 BYTEs   ???
123h    DWORD   pointer to ???
127h 25 BYTEs   ???
140h    DWORD   pointer to ??? in system memory
144h    DWORD   pointer to first task instance data record in system memory
148h    DWORD   pointer to last task instance data record in system memory
                (from INT 15/AX=DE27h) (see #00420)
14Ch    BYTE    ???
14Eh 42 BYTEs   task's default keyboard object
179h 32 BYTEs   task's ObjectQ object
199h 41 BYTEs   task's default mailbox object
1C2h 24 BYTEs   first register save record
452h    --      default top of private stack

Format of DESQview Register Save Record:
Offset  Size    Description     (Table 00415)
 00h    WORD    AX
 02h    WORD    BX
 04h    WORD    CX
 06h    WORD    DX
 08h    WORD    DI
 0Ah    WORD    SI
 0Eh    WORD    DS
 10h    WORD    ES
 12h    DWORD   return address
 16h    WORD    original flags

Format of DESQview mapping context record:
Offset  Size    Description     (Table 00416)
 00h    WORD    lowest segment in process's memory
                (often start of system memory chain)
 02h    WORD    size of process's memory in paragraphs
 04h    BYTE    flag: 00h if process swapped out, 01h otherwise
 05h    BYTE    flag: 00h if allocated in conventional memory, 01h if EMS
 06h  2 BYTEs   ???
 08h    WORD    EMS handle if in EMS, else 0
 0Ah  2 BYTEs   ??? (nonzero if system memory resides in shared mem???)
 0Ch    WORD    segment of system memory block that contains process record,
                  referenced from segment of start of system memory chain
 0Eh    BYTE    ???
 0Fh    WORD    size of system memory block that contains process record
                  and DOS memory in paragraphs
 11h    BYTE    bit flags
                Bit 0: Swapped out???
                Bit 1: ???
                Bit 2: Swapped out???
 12h    BYTE    ???
 13h    BYTE    reference count
 ---v2.31
 14h 10 BYTEs   ???
 1Eh    WORD    segment of process record
 20h  2 BYTEs   ???
 22h    WORD    segment of ???  (in first free system memory block???)
 24h    WORD    segment of end of system memory chain
 26h    WORD    segment of start of system memory chain
 28h  8 BYTEs   ???
 2Ah    DWORD   pointer to ??? (process record???)
 2Dh 10 BYTEs   ???
 37h    BYTE    lowest interrupt vector to save on context switch
 38h    BYTE    highest interrupt vector to save on context switch
 39h    WORD    offset in common memory of main task with this context
 3Ah 12 BYTEs   ???
 46h    BYTE    internal mapping context number
 47h 12 BYTEs   ???
 ---v2.5x-2.60
 14h  6 BYTEs   ???
 1Ah    WORD    segment of process record
 1Ch  2 BYTEs   ???
 1Eh    WORD    segment of first free system memory block
 20h    WORD    segment of start of system memory chain
 22h    WORD    segment of end of system memory chain
 24h 8  BYTEs   ???
 2Ch    DWORD   pointer to ??? (1 segment into process record???)
 30h 3  BYTEs   ???
 33h    WORD    Offset in common memory of main task with this context
 35h 7  BYTEs   ???
 3Ch    BYTE    internal mapping context number
 3Dh 14 BYTEs   ???
 4Bh    WORD    first DOS memory segment (first MCB segment+1)
 4Dh    BYTE    ??? (flag???)
 ---v2.53 (2.5x???)
 4Eh 12 BYTEs   ???
 ---v2.60
 4Eh    WORD    segment of script buffer (see #00421)
 50h  6 BYTEs   ???

Format of DESQview Internal Window Record (v2.31-2.60):
Offset  Size    Description     (Table 00417)
 00h    BYTE    internal window number???
 01h    BYTE    display page???
 02h    BYTE    video mode
 03h  3 BYTEs   ???
 06h    BYTE    logical window height
 07h    BYTE    logical window width
 08h    DWORD   pointer to text video buffer
 0Ch 116 BYTEs  ???

Format of DESQview process record (v2.31):
Offset  Size    Description     (Table 00418)
-470h 13 BYTEs  filename of ??? Script
-463h 1117 BYTEs ??? (script buffer???)
 -6h  6 BYTEs   ???
 00h    WORD    segment of parent PSP in process
 02h  5 BYTEs   ???
 07h    WORD    segment of current PSP in process
 09h    WORD    segment of first MCB in process
 0Bh 13 BYTEs   ???
 18h 1024 BYTEs process's interrupt vector table
418h 376 BYTEs  ???
590h            first MCB in process
SeeAlso: #00419

Format of DESQview process record (v2.52-v2.60) (probably also 2.5x):
Offset  Size    Description     (Table 00419)
 00h 28 BYTEs   EXE header of last EXE, ??? if last program run was COM
 1Ch ??? BYTEs  overwritten with ASCIZ filename of last program run (EXE/COM)
11Ch    WORD    segment of parent PSP in process
11Eh  4 BYTEs   ???
122h    WORD    segment of current PSP
124h    WORD    segment of current PSP
126h    WORD    segment of first MCB in process
128h  4 BYTEs   ???
12Ch    DWORD   pointer to first process instance data record in system memory
130h    DWORD   pointer to last process instance data record in system memory
                (from INT 15/AX=DE27h) (see #00420)
134h  8 BYTEs   ???
13Ch    WORD    size of current environment
13Eh    WORD    segment of current environment
140h    WORD    segment of current PSP
142h    DWORD   entry point of current program
146h 10 BYTEs   ???
---v2.52 (v2.5x???)
150h    BYTE    ???
151h    WORD    segment of parent PSP in process
153h    WORD    ???
155h    WORD    ???
157h    WORD    ???
159h  4 BYTEs   ???
15Dh    WORD    segment of current environment
15Fh    WORD    segment of current PSP
161h    WORD    segment of ???
162h    WORD    ???
164h  3 BYTEs   ???
168h 1024 BYTEs process's interrupt vector table
568h 120 BYTEs  ???
5E0h            first MCB in process
---v2.60
150h    WORD    segment of parent PSP in process
152h    WORD    ???
154h    WORD    ???
156h    WORD    ???
158h  4 BYTEs   ???
15Ch    WORD    segment of current environment
15Eh    WORD    segment of current PSP
160h    WORD    segment of ???
162h    WORD    ???
164h 1024 BYTEs process's interrupt vector table
564h 108 BYTEs  ???
5D0h            first MCB in process
SeeAlso: #00418

Format of DESQview task or process instance data record (v2.5x???, v2.60):
Offset  Size    Description     (Table 00420)
 00h    DWORD   pointer to next record of same type or 00000000
 04h    DWORD   pointer to previous record of same type or 00000000
 08h    DWORD   pointer to source area of memory during restore state
 0Ch    WORD    number of bytes to save/restore
 0Eh    DWORD   pointer to destination area of memory during restore state
 12h    WORD    ??? (0)
 14h  N BYTEs   source memory buffer during restore state

Format of DESQview script buffer (v2.60):
Offset  Size    Description     (Table 00421)
 00h 13 BYTEs   ASCIZ Script filename
 0Dh 80 BYTEs   ???
 5Eh  N BYTEs   script records (see #00422)

Format of one DESQview script record (v2.60):
Offset  Size    Description     (Table 00422)
 00h    BYTE    signature 12h
 01h 18 BYTEs   blank-padded script name
 13h    BYTE    ASCII code of key attached to script or 0 if non-ASCII key
 14h    BYTE    scan code of key attached to script if non-ASCII, else 0
 15h    BYTE    ???
 16h    WORD    size of script in bytes
 18h  N BYTEs   script (ASCII code of each keystroke; if 0, next byte is
                  scan code of non-ASCII key)
SeeAlso: #00421

Format of DESQview Common Memory Header (v2.31-2.60):
Offset  Size    Description     (Table 00423)
 00h    WORD    offset of lowest used block
 02h    WORD    bytes of commom memory, including header
 04h    WORD    offset of first free block
 06h  N BYTEs   size depends of DV version, ??? (DVP buffer???)
Note:   the above is located at the beginning of the commom memory segment
SeeAlso: #00424,#00425,#00433

Format of DESQview Free block header:
Offset  Size    Description     (Table 00424)
 00h    WORD    size of block in bytes including header
 02h    WORD    offset of next free block
 04h  N BYTEs   free block
SeeAlso: #00423,#00425

Format of DESQview Used block header:
Offset  Size    Description     (Table 00425)
 00h    WORD    size of block in bytes including header
 02h  N BYTEs   used block
SeeAlso: #00423,#00424
--------Q-151017-----------------------------
INT 15 - TopView - UNIMPLEMENTED IN DV 2.x
        AX = 1017h
Return: pops up "Programming error" window in DV 2.x
--------Q-151018-----------------------------
INT 15 - TopView - "LOCATE" - FIND WINDOW AT A GIVEN SCREEN LOCATION
        AX = 1018h
        BH = column
        BL = row
        ES = segment of object handle for window below which to search
            0000h = start search with topmost window
Return: ES = segment of object handle for window which is visible at the
               indicated position, or covered by indicated window
            0000h if no window
SeeAlso: AX=1023h,AX=1024h
--------Q-151019-----------------------------
INT 15 - TopView - "SOUND" - MAKE TONE
        AX = 1019h
        BX = frequency in Hertz (0000h = silence)
        CX = duration in clock ticks (18.2 ticks/sec)
Return: immediately, tone continues to completion
Notes:  if another tone is already playing, the new tone does not start until
          completion of the previous one.  Up to 32 tones may be queued before
          the process is blocked until a note completes.
        in DV 2.00, the lowest tone allowed is 20 Hz
        if CX = 0, the current note is cancelled; if BX = 0 as well, all queued
          notes are also cancelled
SeeAlso: AH=82h"HUNTER",INT 16/AH=73h
--------Q-15101A-----------------------------
INT 15 - TopView - "OSTACK" - SWITCH TO TASK'S INTERNAL STACK
        AX = 101Ah
Return: stack switched
Notes:  this call may not be nested; a second call must be preceded by a call
          to "USTACK" (AX=1025h)
        while TopView requires many API calls to be executed while on the
          task's internal stack, DESQview allows those calls to be executed
          regardless of the current stack
SeeAlso: AX=1025h
--------Q-15101B-----------------------------
INT 15 - TopView - "BEGINC" - BEGIN CRITICAL REGION
        AX = 101Bh
Return: task-switching temporarily disabled
Notes:  will not task-switch until "ENDC" (AX = 101Ch) called unless task
          voluntarily releases the CPU (upon regaining the CPU, task-switching
          will again be disabled)
        suspends the caller until DOS is free
SeeAlso: AH=0Dh"MultiDOS",AX=101Ch,AX=DE13h,AX=DE1Ch,INT 2F/AX=1681h
SeeAlso: INT 60/DI=0602h
--------Q-15101C-----------------------------
INT 15 - TopView - "ENDC" - END CRITICAL REGION
        AX = 101Ch
Return: task-switching enabled
Note:   this API call may be made from within a hardware interrupt handler
SeeAlso: AX=101Bh,AX=DE13h,AX=DE1Bh,INT 2F/AX=1682h,INT 60/DI=0603h
--------Q-15101D-----------------------------
INT 15 - TopView - "STOP" - STOP TASK
        AX = 101Dh
        ES = segment of object handle for task to be stopped
            (== handle of main window for that task)
Return: indicated task will not get any CPU time until restarted with AX=101Eh
Note:   once a task has been stopped, additional "STOP"s are ignored
BUG:    in DV 2.00, this function is ignored unless the indicated task is the
          current task
SeeAlso: AX=101Eh,AX=102Bh,AH=12h"VMiX",INT 21/AH=81h
--------Q-15101E-----------------------------
INT 15 - TopView - "START" - START TASK
        AX = 101Eh
        ES = segment of object handle for task to be started
            (== handle of main window for that task)
Return: indicated task is started up again
Note:   once a task has been started, additional "START"s are ignored
SeeAlso: AX=101Dh,AX=102Bh,INT 21/AH=82h
--------Q-15101F-----------------------------
INT 15 - TopView - "DISPEROR" - POP-UP ERROR WINDOW
        AX = 101Fh
        BX = bit fields
            bits 0-12: number of characters to display
            bits 13,14: which mouse button may be pressed to remove window
                         00 = either
                         01 = left
                         10 = right
                         11 = either
            bit 15: beep if 1
        ES:DI -> text of message
        CH = width of error window (0 = default)
        CL = height of error window (0 = default)
        DX = segment of object handle
Return: BX = status: 1 = left button, 2 = right, 27 = ESC pressed
Note:   window remains on-screen until ESC or indicated mouse button is pressed
--------Q-151020-----------------------------
INT 15 - TopView - UNIMPLEMENTED IN DV v2.00+
        AX = 1020h
Return: pops up "Programming error" window in DV v2.00+
--------Q-151021-----------------------------
INT 15 - TopView - "PGMINT" - INTERRUPT ANOTHER TASK
        AX = 1021h
        BX = segment of object handle for task to interrupt (not self)
        DX:CX -> FAR routine to jump to next time task is run
Return: nothing
Notes:  the FAR routine is entered with the current ES, DS, SI, DI, and BP
          values, using the task's internal stack (see AX=101Ah); only SS:SP
          needs to be preserved
        multiple PGMINTs to a single task are processed last-in first-out
        if the other task is in a DOS or DV API call, the interruption will
          occur on return from that call
--------Q-151022BX0000-----------------------
INT 15 - TopView - "GETVER" - GET VERSION
        AX = 1022h
        BX = 0000h
Return: BX nonzero, TopView or compatible loaded
        (BL = major version, BH = minor version)
Notes:  TaskView returns BX = 0001h, DESQview v2.00+ returns BX = 0A01h
--------Q-151023-----------------------------
INT 15 - TopView - "POSWIN" - POSITION WINDOW
        AX = 1023h
        BX = segment of object handle for parent window within which to
               position the window (0 = full screen)
        ES = segment of object handle for window to be positioned
        DL = general window position (see #00426)
        CH = number of columns to offset from position specified by DL
        CL = number of rows to offset from position specified by DL
Return: nothing

Bitfields for TopView general window position:
Bit(s)  Description     (Table 00426)
 0,1    horizontal position
        00 = current, 01 = center, 10 = left, 11 = right
 2,3    vertical position
        00 = current, 01 = center, 10 = top, 11 = bottom
 4      don't redraw screen if set
 5-7    not used
--------Q-151024-----------------------------
INT 15 - TopView - "GETBUF" - GET VIRTUAL SCREEN INFO
        AX = 1024h
        BX = segment of object handle for window (0000h = use default)
Return: ES:DI -> virtual screen
        CX = size of virtual screen in bytes
        DL = screen type
            00h text screen
            01h graphics screen
SeeAlso: INT 10/AH=FEh,INT 21/AH=2Bh/CX=4445h
--------Q-151025-----------------------------
INT 15 - TopView - "USTACK" - SWITCH BACK TO USER'S STACK
        AX = 1025h
Return: stack switched back
Notes:  call only after having switched to internal stack with AX=101Ah
        while TopView requires many API calls to be executed while on the
          task's private stack, DESQview allows those calls to be executed
          regardless of the current stack
SeeAlso: AX=101Ah
--------Q-1510-------------------------------
INT 15 - DESQview (TopView???) - UNIMPLEMENTED IN DV 2.x
        AH = 10h
        AL = 26h thru 2Ah
Return: pops up "Programming error" window in DV 2.x
--------Q-15102B-----------------------------
INT 15 - DESQview v2.00+ (TopView???) - "POSTTASK" - AWAKEN TASK
        AX = 102Bh
        BX = segment of object handle for task
Return: nothing
Note:   forces a task which is waiting on its objectq to continue by placing
          the handle for the task on the objectq
SeeAlso: AX=101Dh,AX=101Eh,INT 21/AH=82h
--------Q-15102C-----------------------------
INT 15 - DESQview v2.00+ - "NEWPROC" - START NEW APPLICATION IN NEW PROCESS
        AX = 102Ch
        ES:DI -> contents of .PIF/.DVP file (see #00427)
        BX = size of .PIF/.DVP info
Return: BX = segment of object handle for new task
            0000h on error
SeeAlso: AX=DE24h,INT 21/AH=4Bh

Format of .PIF/.DVP file:
Offset  Size    Description     (Table 00427)
 00h    BYTE    reserved (0)
 01h    BYTE    checksum of bytes 02h through 170h
 02h 30 BYTEs   blank-padded program title
 20h    WORD    maximum memory to allocate to partition in KB
 22h    WORD    minimum memory required in KB
 24h 64 BYTEs   ASCIZ program pathname
 64h    BYTE    default drive letter ('A',...)
 65h 64 BYTEs   ASCIZ default directory name
 A5h 64 BYTEs   ASCIZ program parameters
 E5h    BYTE    initial screen mode (0-7) (also see offset 189h)
 E6h    BYTE    number of text pages used
 E7h    BYTE    number of first interrupt to save
 E8h    BYTE    number of last interrupt to save
 E9h    BYTE    rows in virtual screen buffer
 EAh    BYTE    columns in virtual screen buffer
 EBh    BYTE    initial window position, row
 ECh    BYTE    initial window position, column
 EDh    WORD    system memory in KB
 EFh 64 BYTEs   ASCIZ shared program name
12Fh 64 BYTEs   ASCIZ shared program data file
16Fh    BYTE    program flags 1 (see #00428)
170h    BYTE    flags2
                bit 6: uses command-line parameters in field at A5h
                bit 5: swaps interrupt vectors
---information unique to .DVP files---
171h  2 BYTEs   keys to use on open menu
173h    WORD    size of script buffer in bytes
175h    WORD    automatically give up CPU after this many tests for keyboard
                  input in one clock tick (default 0 = never)
177h    BYTE    nonzero = "uses own colors"
178h    BYTE    nonzero if application swappable
179h  3 BYTEs   reserved (0) according to Quarterdeck documentation
                in actual .DVP files, frequently 01h
17Ch    BYTE    nonzero to automatically close on exit (see also #00430)
17Dh    BYTE    nonzero if copy-protect floppy is required
---information unique to DESQview 2.0+---
17Eh    BYTE    .DVP version number
                00h DESQview v1.2+
                01h DESQview v2.0+
                02h DESQview v2.2+
17Fh    BYTE    reserved (0)
180h    BYTE    initial number of rows in physical window
181h    BYTE    initial number of columns in physical window
182h    WORD    maximum expanded memory to allow, in KB
184h    BYTE    DVP program flags 3 (see #00429)
185h    BYTE    keyboard conflict level (0-4 for DV<2.26, 00h-0Fh for DV2.26+)
                (see #00431)
186h    BYTE    number of graphics pages used
187h    WORD    extra system memory size
189h    BYTE    initial screen mode (FFh = default) (overrides offset E5h)
---information unique to DESQview 2.2+---
18Ah    BYTE    serial port usage
                FFh uses all serial ports
                00h no serial ports
                01h only COM1
                02h only COM2
18Bh    BYTE    DVP program flags 4 (see #00430)
18Ch    BYTE    protection level for 386 machines
18Dh 19 BYTEs   reserved (0) for regular DESQview
---information unique to DESQview/X 1.0---
18Dh    BYTE    X flags
                bits 3-7: unused (0)
                bit 2: don't display wait message when opening window
                bit 1: don't display DOS window
                bit 0: (XNEWPROC) use DOS client layer (DOS-to-X)
                       (NEWPROC) inherit DOS client layer usage
18Eh    BYTE    X keyboard behavior (0-3)
18Fh    BYTE    font scaling
                00h fixed fonts
                01h scalable fonts
190h 10 BYTEs   reserved (0)
19Ah    WORD    length of data follownig XDVP signature
19Ch  4 BYTEs   signature "XDVP"
1A0h  N BYTEs   list of variable length records (see #00432)

Bitfields for .PIF/.DVP program flags 1:
Bit(s)  Description     (Table 00428)
 7      writes text directly to screen
 6      runs in foreground only (see also #00427 offset 184h)
 5      uses math coprocessor
 4      accesses system keyboard buffer directly
 3-1    reserved (0)
 0      swappable
SeeAlso: #00427,#00429,#00430

Bitfields for .DVP program flags 3:
Bit(s)  Description     (Table 00429)
 7      automatically assign window position
 5      maximum memory value has been specified
 4      disallow "Close" command
 3      foreground-only when doing graphics
        set by DV 2.3+ when "Runs in Background" = "D" (undoc)
 2      don't virtualize (see also #00430)
 1      foreground-only during DOS calls
        set by DV 2.3+ when "Runs in Background" = "D" (undoc)
SeeAlso: #00427,#00428,#00430

Bitfields for .DVP program flags 4:
Bit(s)  Description     (Table 00430)
 7      automatically close application on exit if .COM or .EXE specified
        (see also #00427 offset 17Ch)
 6      swappable if not using serial ports
 5      start program with window hidden (v2.26+)
 4      start program in background (v2.26+)
 3      virtualize text (see also #00429)
 2      virtualize graphics (see also #00429)
 1      share CPU when foreground
 0      share EGA when foreground and zoomed
SeeAlso: #00427,#00428,#00429

Bitfields for DESQview keyboard conflict level:
Bit(s)  Description     (Table 00431)
 3      save/restore entire INT 09 handler state every taskswtch
 2      take special precautions for programs which read the BIOS keyboard
          buffer directly from memory
 1      never indicate keystroke available during scripts/xfers
 0      only indicate keystroke available every sixth poll
SeeAlso: #00427

Format of DESQview/X variable length record:
Offset  Size    Description     (Table 00432)
 00h    WORD    length of following record, 0000h if end of record list
 02h    BYTE    record type
                01h script filename, up to 64 characters
                02h command-line parameters (allows >64 characters on cmdline)
                03h environment inheritance
                04h environment string
                05h starting window position
---types 01h,02h,04h---
 03h  N BYTEs   ASCII data
---type 03h---
 03h    BYTE    inheritance
                00h do not inherit
                01h inherit environment
---type 05h---
 03h  N BYTEs   ASCII copy of fields as typed into DVPMAN, separated by commas:
                starting row, starting column, starting height, starting width
Note:   if there are multiple occurrences of record types 01h, 02h, or 03h,
          only the last instance of each type is used; multiple occurrences of
          type 04h are concatenated
SeeAlso: #00427
--------Q-15102D-----------------------------
INT 15 - DESQview v2.00+ - "KMOUSE" - KEYBOARD MOUSE CONTROL
        AX = 102Dh
        BL = subfunction
            00h determine whether using keyboard mouse
                Return: BL = 00h using real mouse
                             01h using keyboard mouse
            01h turn keyboard mouse on
            02h turn keyboard mouse off
SeeAlso: INT 33/AX=0024h
--------Q-15102E-----------------------------
INT 15 - DESQview v2.40+ - ALLOCATE SYSTEM MEMORY
        AX = 102Eh
        BX = number of bytes
Return: AX = status
            0000h successful
                ES:DI -> allocated system memory (see #00433)
            0001h failed
                ES:DI = 0000h:0000h
Note:   under DV 2.42, this call is identical to AX=1001h
SeeAlso: AX=1001h,AX=1002h,AX=DE0Ch

Format of DESQview system memory block header:
Offset  Size    Description     (Table 00433)
 00h    WORD    segment of next header or 0000h
 02h    WORD    segment of previous header or 0000h
 04h    WORD    size of block in paragraphs, including header
 06h    BYTE    availability flag (00h in use, 01h free)
Note:   this header is located one paragraph before the memory block proper
SeeAlso: #00423
--------Q-1511-------------------------------
INT 15 - TopView commands
        AH = 11h
        AL = various (except 17h)
Return: varies by function
Note:   in DESQview 2.x, these function calls are identical to AH=DEh, so
          see those below
SeeAlso: AX=DE00h,AX=DE22h,AX=DE30h
--------T-1511-------------------------------
INT 15 - VMiX - "sys_system" - EXECUTE SHELL SYSTEM COMMANDS
        AH = 11h
        STACK:  DWORD   pointer to ASCIZ string containing a VMiX shell
                        request (max len = 127)
Return: AX = status (SYS_OK or SYS_ERROR)
SeeAlso: AH=0Ch"VMiX"
--------T-1511-------------------------------
INT 15 - MultiDOS Plus - TURN OFF AltZ TOGGLE
        AH = 11h
Note:   disables the Alt-Z MultiDOS command/program-selection hotkey
SeeAlso: AH=12h"MultiDOS"
Index:  hotkeys;MultiDOS Plus
--------Q-151117BX0000-----------------------
INT 15 - DESQview v2.20+ - "ASSERTMAP" - GET/SET MAPPING CONTEXT
        AX = 1117h
        BX = 0000h      get current mapping context without setting
             nonzero    set new mapping context
Return: BX = mapping context in effect before call
        interrupts enabled
Notes:  this function differs from AX = DE17h for DESQview v2.20 through 2.25
        mapping contexts determine conventional-memory addressability; setting
          a mapping context ensures that the associated program and data areas
          are in memory for access.  Usable by drivers, TSRs and shared
          programs.
        caller need not be running under DESQview, but must ensure that the
          stack in use will not be mapped out by the call
SeeAlso: AX=DE17h,INT 2F/AX=1685h
--------m-1511DE-----------------------------
INT 15 - DESQview - QEXT.SYS - INSTALLATION CHECK
        AX = 11DEh
Return: CF clear if installed
            AX = segment at which QEXT.SYS is located
Desc:   QEXT.SYS is Quarterdeck's HMA manager for DESQview; more recent
          versions also implement the XMS standard
Note:   a private entry point (see #00434) may be found by searching the
          beginning of the returned segment for the signature string
          "QUARTERDECK EXTENDED MEMORY MANAGER 286"; the word immediately
          prior to the signature contains the QEXT version number in BCD,
          and the word prior to that contains the offset within the QEXT
          code segment of the private entry point
SeeAlso: INT 2F/AX=4310h"XMS",INT 67/AH=3Fh

(Table 00434)
Call QEXT.SYS private entry point with:
        AH = 00h ???
        AH = nonzero ???
--------T-1512-------------------------------
INT 15 - VMiX - "sys_sleep" - PUT PROCESS TO SLEEP
        AH = 12h
        STACK:  WORD    process ID
Return: AX = status (SYS_OK or SYS_ERROR)
SeeAlso: AH=03h"MultiDOS",AX=101Dh,AH=13h"VMiX"
--------T-1512-------------------------------
INT 15 - MultiDOS Plus - TURN ON AltZ TOGGLE
        AH = 12h
Note:   enables the Alt-Z MultiDOS command/program-selection hotkey
SeeAlso: AH=11h"MultiDOS"
Index:  hotkeys;MultiDOS Plus
--------Q-1512--BH00-------------------------
INT 15 - TopView - SEND MESSAGE - "HANDLE" - RETURN OBJECT HANDLE
        AH = 12h
        BH = 00h
        BL = which handle to return
            00h handle in DWORD on top of stack
            01h current task's window handle
            02h given task's mailbox handle (task's handle on stack)
            03h current task's mailbox handle
            04h given task's keyboard handle (task's handle on stack)
            05h current task's keyboard object handle
            06h given task's OBJECTQ handle (task's handle on stack)
            07h current task's OBJECTQ handle
            08h   \
              thru > return 0000:0000 under DV < 2.26
            10h   /
            0Ch (2.26+) task owning object with handle in DWORD on top of stack
            0Dh (2.26+) task handle of owner (parent) of current task
Return: DWORD on top of stack is object handle
Note:   BL=0Ch,0Dh returns 00000000h if the object is not open (keyboard,
          mailbox, panel, pointer, and timer objects) or is an orphan (task,
          window)
SeeAlso: AH=12h/BH=02h,AH=12h/BH=80h
--------Q-1512--BH01-------------------------
INT 15 - TopView - SEND MESSAGE - "NEW" - CREATE NEW OBJECT
        AH = 12h
        BH = 01h
        BL = object type to create (see #00435)
        STACK: (only if window object or WINDOW class)
               DWORD address to jump to (no new task if high word == 0)
               DWORD (reserved) 0 = non-task window, FFFFh = task window
               DWORD bytes for task's private stack (FFFFh == default of 0100h)
               DWORD bytes system memory for input buffer for READ/READN
                        (0 == none, -1 == default--same as logical window size)
               DWORD window size, columns
               DWORD window size, rows
               DWORD length of window title
               DWORD address of window title
Return: DWORD on top of stack is new object handle
Notes:  if a new task is created, it is started with
          AX = BX = SI = DI = BP = 0
          DX:CX = handle of parent task
          DS = ES = SS = segment of private stack (and new task's handle)
        new windows are orphans, inherit the colors/hidden status of the
          creating task's window, and are placed in the upper left hand corner
          of the screen but not automatically redrawn
        new keyboards are closed, and have all object bits cleared except for
          the hardware cursor bit
SeeAlso: AH=12h/BH=02h,AH=12h/BH=81h

(Table 00435)
Values for TopView/DESQview object type (for creation):
 00h    (DV 2.0x only) handle is DWORD on top of stack
 01h    (DV 2.0x only) use task's window handle
 02h    (DV 2.0x only) given task's mailbox (task's handle on stack)
 03h    (DV 2.0x only) current task's mailbox
 04h    (DV 2.0x only) given task's keyboard (task's handle on stack)
 05h    (DV 2.0x only) current task's keyboard object
 08h    WINDOW class
 09h    MAILBOX class
 0Ah    KEYBOARD class
 0Bh    TIMER object (counts down 32-bit time in 10ms increments)
 0Fh    POINTER object
 10h    PANEL object
--------Q-1512--BH02-------------------------
INT 15 - TopView - SEND MESSAGE - "FREE" - FREE AN OBJECT
        AH = 12h
        BH = 02h
        BL = object
            00h handle in DWORD on top of stack
                window: close window and free
                timer: free timer
                panel: free panel object
                pointer: free pointer
            01h task's window handle - kills task, never returns
            02h given task's mailbox (task's handle on top of stack)
            03h current task's mailbox
            04h given task's keyboard (task's handle on top of stack)
            05h current task's keyboard object
Return: STACK popped if handle passed on stack
Notes:  when a window is freed, its keyboard and pointer objects are freed;
          task windows also free any mailbox, objectq, and panel objects held
          by the task and any child tasks
        if the keyboard being freed is the default keyboard for a task, this
          call is equivalent to CLOSE
        panel and pointer objects are automatically closed if open
SeeAlso: AH=12h/BH=01h,AH=12h/BH=0Dh,AH=12h/BH=82h
--------Q-1512--BH03-------------------------
INT 15 - TopView - SEND MESSAGE - "ADDR" - GET HANDLE OF MESSAGE SENDER
        AH = 12h
        BH = 03h
        BL = object
            00h mailbox handle in DWORD on top of stack
            02h sender of last msg read from mailbox (task's handle on stack)
            03h sender of last msg read from current task's mailbox
Return: DWORD on stack is task handle of message sender
SeeAlso: AH=12h/BH=00h,AH=12h/BH=83h
--------Q-1512--BH03-------------------------
INT 15 - DESQview v2.26+ - "CONNECT" - CONNECT TWO WINDOWS
        AH = 12h
        BH = 03h
        BL = window to be connected
            00h handle of window to be attached in DWORD on top of stack
            01h attach current task's main window
        STACK: DWORD handle of window to attach to or 00000000h to detach
Return: STACK popped
Notes:  when two windows are connected, both will move if the user moves either
        multiple windows may be attached to a single window, but each window
          may only be attached to one window at a time
SeeAlso: AH=12h/BH=83h
--------Q-1512--BX0300-----------------------
INT 15 - TopView - SEND MESSAGE - "DIR" - GET PANEL FILE DIRECTORY
        AH = 12h
        BX = 0300h
        STACK: DWORD handle of panel object (see #00436)
Return: STACK: DWORD length of directory (always multiple of 14 bytes)
               DWORD address of directory
Note:   a null string is returned if the object is not open
SeeAlso: AH=12h/BX=0400h"APPLY",AH=12h/BH=83h

Format of TopView panel file:
Offset  Size    Description     (Table 00436)
 00h  2 BYTEs   C0h C3h
 02h    BYTE    number of panels in file
 03h    for each panel in file:
            8 BYTEs  blank-padded panel name
              DWORD  panel offset in file
              WORD   panel length
        data for panels (each consists of one or more window/query/manager
          streams); first byte of each panel must be 1Bh, fifth byte must be
          E5h
--------Q-1512--BH04-------------------------
INT 15 - TopView - SEND MESSAGE - "READ" - READ NEXT LOGICAL LINE OF WINDOW
        AH = 12h
        BH = 04h
        BL = window to read from
            00h handle is DWORD on top of stack
            01h use calling task's default window
            0Ch (DV 2.26+) default window of task owning handle on top of stack
            0Dh (DV 2.26+) default window of parent task of current task
Return: STACK:  DWORD number of bytes read
                DWORD address of buffer
Notes:  reading starts at the current logical cursor position; the cursor is
          updated to point at the character following the last one read
        any translucent blanks (FFh) which are visible on screen are changed
          to the character which is seen through them
        the string produced by the read is placed in an input buffer which may
          be reused by the next READ or READN of a window
        window stream opcodes D8h and D9h determine whether the read returns
          characters or attributes
SeeAlso: AH=12h/BH=05h"WINDOW",AH=12h/BH=12h,AH=12h/BH=84h
--------Q-1512--BH04-------------------------
INT 15 - TopView - SEND MESSAGE - "READ" - GET NEXT RECORD FROM OBJECT
        AH = 12h
        BH = 04h
        BL = object
            00h handle is DWORD on top of stack
                mailbox: wait for and get next message
                keyboard: wait for and get pointer to next input buffer
                pointer: wait for and get next message
            02h get next message from mailbox (task's handle on top of stack)
            03h get next message from current task's mailbox
            04h get the next input from keyboard (handle on top of stack)
            05h get the next input from task's default keyboard
            06h wait for input from any object in OBJECTQ (handle on stack)
            07h wait for input from any object in task's default OBJECTQ
Return: STACK: (if objectq) DWORD handle of object with input
               (otherwise)  DWORD number of bytes
                            DWORD address of pointer message (see #00437)
Notes:  for a keyboard in keystroke mode, the input buffer is a single byte
          containing the character code as returned by the BIOS; the BIOS scan
          code is available via the STATUS call if the character is zero
        for a keyboard in field mode, the input buffer format is determined
          by the field table header for the window the keyboard is attached to
        keyboard input buffers and mailbox message buffers may be invalidated
          by the next READ, ERASE, CLOSE, or FREE message to the same object
SeeAlso: AH=12h/BH=05h"OBJECT",AH=12h/BH=84h

Format of DESQview pointer message:
Offset  Size    Description     (Table 00437)
 00h    WORD    row
 02h    WORD    column
 04h    BYTE    status (see #00438)
 05h    BYTE    field number or zero (APILEVEL >= 2.00 only)

Bitfields for DESQview pointer status:
Bit(s)  Description     (Table 00438)
 7-2    number of clicks-1 if multiple-click mode active
 7      set when press/release mode active and button pressed
 6      set when press/release mode active and button released
 1-0    button pressed (00=none,01=button1,10=button2)
SeeAlso: #00437
--------Q-1512--BX0400-----------------------
INT 15 - TopView - SEND MESSAGE - "READ" - WAIT FOR TIMER TO EXPIRE
        AH = 12h
        BX = 0400h
        STACK: DWORD timer's handle
Return: after timer expires
        STACK: DWORD time in 1/100 sec after midnight when timer expired
SeeAlso: AH=12h/BH=0Ah,AH=12h/BH=84h
--------Q-1512--BX0400-----------------------
INT 15 - TopView - SEND MESSAGE - "APPLY" - WRITE PANEL TO WINDOW
        AH = 12h
        BX = 0400h
        STACK: DWORD handle of panel object
               DWORD window's handle (or 0 for current task's window)
               DWORD length of panel name
               DWORD pointer to panel name
Return: STACK: DWORD handle of window which was used
               DWORD handle of keyboard or 0
Notes:  status of APPLY may be checked with STATUS message
        panel MUST have the following format
          first byte must be 1Bh (i.e. must start with a stream)
          first opcode in stream must be E5h
            single byte arg of opcode is interpreted thus:
              bits 7,6  11 means create new window
                        10 means create new field table for existing window
                        01 means use existing window and field table
              bit 5 if set, panel contains a field table
                        (creates a new keyboard and puts it in field mode)
              bit 4 if set, panel contains input fields
              bit 3 if set, panel contains select fields but no input fields
        if the panel contains input or select fields, a keyboard handle is
          returned; either the window's current open keyboard or a
          newly-created keyboard object.  The caller should read that keyboard
          to obtain input from the panel.
SeeAlso: AH=12h/BH=84h
--------Q-1512--BH05------------------------
INT 15 - TopView - SEND MESSAGE - "WRITE" - WRITE TO OBJECT
        AH = 12h
        BH = 05h
        BL = object
            00h handle is DWORD on top of stack
                timer: start timer to end at a specified time
                keyboard: add input buffer to queue
                pointer: move pointer icon to specified position
            02h send message by value/status=0 to mbox (task's handle on stack)
            03h send message by value/status=0 to current task's mailbox
            04h add input buffer to KEYBOARD queue (handle on top of stack)
            05h add input buffer to task's default KEYBOARD queue
            06h add an object to OBJECTQ (handle on top of stack)
            07h add an object to task's default OBJECTQ
        STACK: (if mailbox)  DWORD length
                             DWORD address
               (if keyboard) DWORD status (scan code in keystroke mode)
                             DWORD length (should be 1 in keystroke mode)
                             DWORD address
               (if objectq)  DWORD handle of object to add
               (if timer)    DWORD 1/100ths seconds since midnight (actually
                                   only accurate to 1/18 sec)
               (if pointer)  DWORD column relative to origin of window
                             DWORD row relative to origin of window
Return: STACK popped
Notes:  under DV 2.2+, failed mailbox writes may return CF set (see AX=DE15h)
        the data and status written to a keyboard object must match the format
          returned by the keyboard object in the current mode
        the pointer position is scaled according to the current scaling factors
SeeAlso: AH=12h/BH=04h,AH=12h/BH=85h
--------Q-1512--BH05-------------------------
INT 15 - TopView - SEND MESSAGE - "WRITE" - WRITE STRING TO WINDOW
        AH = 12h
        BH = 05h
        BL = window to write to
            00h DWORD on top of stack is window handle
            01h write string to task's default window
            0Ch (DV 2.26+) default window of task owning handle on top of stack
            0Dh (DV 2.26+) default window of parent of current task
        STACK: DWORD object handle if handle passed on stack
               DWORD total length of string (high word == 0)
               DWORD address of string to display (see #00439)
Return: indicated actions performed
        a. non-control characters are displayed (opcodes DEh and DFh control
           whether the attributes are left or changed to the current attrib)
        b. CR/LF/BS/Tab cause the usual cursor movement
        c. ESC starts a data structure with additional commands if following
           byte is less than 20h; otherwise, it is written to the window
        STACK:  DWORD handle of new window if window stream opcode E6h
                else nothing (arguments have been popped)
SeeAlso: AH=12h/BH=04h,AH=12h/BH=85h

Format of stream data structure:
Offset  Size    Description     (Table 00439)
 00h    BYTE    1Bh magic value identifying start of stream
 01h    BYTE    stream type (00h, 01h, 10h, 14h-1Fh legal)
                (see #00440,#00446,#00447,#00448)
 02h    WORD    length of remainder of stream in bytes
        var-length fields follow, each an OPCODE followed by
             zero or more args

(Table 00440)
Values for MODE 00h (set or display values) "WINDOW STREAM" opcodes:
Opcodes:args
 00h  display 20h blanks with the default attribute
 01h-1Fh display OPCODE blanks with the default attribute
 20h  display char with default attribute 20h times
        BYTE char to repeat
 21h-3Fh display char with default attribute OPCODE-20h times
        BYTE char to repeat
 40h  display 20h blanks with specified attribute
        BYTE attribute of blanks
 41h-5Fh display OPCODE-40h blanks with specified attribute
        BYTE attribute of blanks
 60h  display next 20h characters
        20h BYTEs characters to display
 61h-7Fh display next OPCODE-60h characters
        N BYTEs characters to display
 80h-87h display N blanks with default attribute
        BYTE low 8 bits of 11-bit count (high 3 in low 3 bits of OPCODE)
                  [000h means 800h]
 88h-8Fh display N copies of the character
        BYTE low 8 bits of 11-bit count (high 3 in low 3 bits of OPCODE)
                  [000h means 800h]
        BYTE character to repeat
 90h-97h display N blanks with specified attribute
        BYTE low 8 bits of 11-bit length (high 3 in low 3 bits of OPCODE)
                  [000h means 800h]
        BYTE attribute
 98h-9Fh display string at logical cursor pos
        BYTE low 8 bits of 11-bit length (high 3 in low 3 bits of OPCODE)
                  [000h means 800h]
        N BYTEs string to display
 A0h  set logical cursor row
        BYTE row number (0 is top)
 A1h  set logical cursor column
        BYTE column number (0 is leftmost)
 A2h  set top edge of scrolling region
        BYTE row
 A3h  set left edge of scrolling region
        BYTE column
 A4h  set row of physical window position
        BYTE line
 A5h  set column of physical window position
        BYTE column
 A6h  set height of physical window
        BYTE number of rows
 A7h  set width of physical window
        BYTE number of columns
 A8h  set viewport row
        BYTE row
 A9h  set viewport column
        BYTE column
 AAh  set virtual screen height [contents of window unpredictable after]
        BYTE rows
 ABh  set virtual screen width [contents of window unpredictable after]
        BYTE columns
 ACh-AEh unused
 AFh  set compatible/preferred video modes
        BYTE compatibility/preference mask
                bit 7   compatible with monochrome
                bit 6   compatible with color text, EGA/VGA graphics
                bit 5   compatible with medium-resolution CGA graphics
                bit 4   compatible with high-resolution CGA graphics
                bit 3   prefer monochrome
                bit 2   prefer color text, EGA/VGA graphics
                bit 1   prefer medium-resolution CGA graphics
                bit 0   prefer high-resolution CGA graphics
 B0h  move logical cursor down
        BYTE number of rows (signed, negative values move up)
                [if rows=0 and hardware cursor owner, update hardware cursor]
 B1h  move logical cursor right
        BYTE number of columns (signed, negative values move left)
                [if cols=0 and hardware cursor owner, update hardware cursor]
 B2h  shift top edge of scrolling region
        BYTE number of rows (signed)
 B3h  shift left edge of scrolling region
        BYTE number of columns (signed)
 B4h  shift physical window down
        BYTE number of lines (signed)
 B5h  shift physical window right
        BYTE number of columns (signed)
 B6h  expand physical window vertically
        BYTE number of lines (signed)
 B7h  expand physical window horizontally
        BYTE number of columns (signed)
 B8h  adjust viewport row
        BYTE number of rows (signed)
 B9h  adjust viewport column
        BYTE number of columns (signed)
 BAh  adjust virtual screen height [contents of window unpredict after]
        BYTE number of rows to increase (signed)
 BBh  adjust virtual screen width [contents of window unpredictbl after]
        BYTE number of columns to increase (signed)
 BCh-BFh reserved (currently unused)
 C0h  set logical cursor position
        BYTE row number (0 is top border)
        BYTE column number (0 is left border)
 C1h  set top left corner of scrolling region
        BYTE row
        BYTE column
 C2h  set physical window pos
        BYTE upper left row (no top border if 0)
        BYTE upper left column (no left border if 0)
 C3h  set current window size
        BYTE number of rows
        BYTE number of columns
 C4h  set upper left corner of viewport (portion of virtual screen displayed
          in window)
        BYTE row
        BYTE column
 C5h  set size of virtual screen [contents unpredictable afterwards]
        BYTE number of rows
        BYTE number of columns
 C6h  unused
 C7h  unused
 C8h  set logical cursor relative to current position
        BYTE number of rows to move down (signed)
        BYTE number of columns to move right (signed)
                [if rows=cols=0 and hardware cursor owner, update hardw cursor]
 C9h  shift top left corner of scrolling region
        BYTE number of rows (signed)
        BYTE number of columns (signed)
 CAh  set window pos relative to current position
        BYTE number of rows to shift down (signed)
        BYTE number of columns to shift right (signed)
 CBh  set window size relative to current size
        BYTE number of rows to expand (signed)
        BYTE number of cols to expand (signed)
 CCh  shift viewport relative to current position
        BYTE rows to shift (signed)
        BYTE cols to shift (signed)
 CDh  resize virtual screen
        BYTE number of rows to expand (signed)
        BYTE number of columns to expand (signed)
 CEh  scroll text when using E8h-EBh/F8h-FBh opcodes (default)
 CFh  scroll attributes when using  E8h-EBh/F8h-FBh opcodes
 D0h  allow window frame to extend beyond screen
 D1h  always display a complete frame, even if window extends beyond edge of
          screen
 D2h  allow DV to change logical colors on video mode switch (default)
 D3h  application changes logical attributes
 D4h  window is visible [must redraw to actually make visible]
 D5h  window is hidden [must redraw to actually remove]
 D6h  window has frame (default)
 D7h  window unframed [must redraw to actually remove frame]
 D8h  READ/READN will read characters from window (default)
 D9h  READ/READN will read attributes from window
 DAh  use logical attributes, which may be remapped (see #00441)
 DBh  use physical attributes for characters
 DCh  enable special actions for control characters (default)
 DDh  disable special control char handling, all chars displayable by BIOS TTY
          call
 DEh  write both character and attribute (default)
 DFh  write character only, leave attribute untouched
 E0h  repeat following commands through E1h opcode
        BYTE number of times to repeat (00h means 256 times)
 E1h  end of commands to repeat, start repeating them
 E2h  set current output color
        BYTE color
 E3h  clear virtual screen from scroll origin to end using current color
 E4h  redraw window
 E5h  select menu style
        BYTE style (normally 18h)
                bits 5,4 = 01 use two-letter menu entries for remainder of
                  this stream
 E5h  (panel file only)
        BYTE modifier
                bits 7,6 = 11 panel stream creates new window
                         = 10 panel defines new field table for existing window
                         = 01 panel stream uses existing window & field table
                bit 5 = 1 stream contains a field table (create kyboard object)
                bit 4 = 1 stream defines input fields (create keyboard object)
                bit 3 = 1 stream defines select fields but not input fields
                bit 2 = 1 stream defines exclusive input window (DV 2.2)
                bit 1 reserved
                bit 0 reserved
 E6h  create new window and perform rest of manipulations in new window
        BYTE number of rows
        BYTE number of columns
        Return: DWORD object handle of new window returned on stack at end
        Note:   the window is created with a physical size of 0x0 at the
                  same position as the window to which this stream was sent
 E7h  no operation
 E8h  scroll area up (top left corner defined by opcode C1h)
        BYTE height
        BYTE width
 E9h  scroll area down (top left corner defined by opcode C1h)
        BYTE height
        BYTE width
 EAh  scroll area left (top left corner defined by opcode C1h)
        BYTE height
        BYTE width
 EBh  scroll area right (top left corner defined by opcode C1h)
        BYTE height
        BYTE width
 ECh  set logical attributes for window contents
        BYTE video modes command applies to
                bit 7   monochrome
                bit 6   color text, EGA/VGA graphics
                bit 5   medium-resolution CGA graphics
                bit 4   high-resolution CGA graphics
        BYTE which attributes to set
                bit 7   if set, copy single following byte to indicated attribs
                bits 4-6  number of first attribute to change - 1
                bits 0-3  number of consecutive attributes to change
        N BYTEs new attributes
 EDh  set logical attributes for window frame
        BYTE video modes command applies to (also see opcode ECh)
        BYTE which attributes to set
                bit 7   if set, copy single following byte to indicated attrs
                bits 4-6  number of first attribute to change - 1
                bits 0-3  number of consecutive attributes to change
        N BYTEs new attributes
                  attributes
                       1 = top left corner
                       2 = top right corner
                       3 = bottom left corner
                       4 = bottom right corner
                       5 = top edge
                       6 = bottom edge
                       7 = left edge
                       8 = right edge
 EEh  set characters for window frame
        BYTE video modes command applies to (also see opcode ECh)
        BYTE which characters to set
                bit 7   if set, copy single following byte to indicated chars
                bits 4-6  number of first character to change - 1
                bits 0-3  number of consecutive characters to change
        N BYTEs new chars (same relative position as attributes above)
 EFh  set window name
        BYTE length of name (should be in range 0 to logical screen width)
        N BYTEs name
 F0h  clear input field to blanks
        BYTE field number
 F1h  fill input field with character
        BYTE field number
        BYTE char
 F2h  set color of input field
        BYTE field number (1-N)
        BYTE attribute
 F3h  set initial contents of input field
        BYTE field number (1-N)
        N BYTEs enough chars to exactly fill field as defined by op FFh
 F4h  position cursor to start of specific input field
        BYTE field number (1-N)
 F5h  change field table entry
        BYTE field number
        7-8 BYTEs field table entry (also see opcode FFh below)
 F6h  set field type
        BYTE field number
        BYTE type
                00h inactive
                40h output field
                80h input field
                C0h deselected field
                C2h selected field
 F7h  "broadcast write" write data to fields with program output bit set in
          the field table entry, in field number order
        N BYTEs (total length of all program output fields)
 F8h  scroll field up a line
        BYTE field number
 F9h  scroll field down a line
        BYTE field number
 FAh  scroll field left
        BYTE field number
 FBh  scroll field right
        BYTE field number
 FCh  set field table header
        6 BYTEs field table header (see #00442)
 FDh  reset modified bit for all fields
 FEh  reset selected and modified bits for all fields
 FFh  set up input fields
        6 BYTEs table header (see #00442)
        7/8N BYTEs the field table entries, one for each field (see #00444)
        Note:   DESQview uses and updates the actual copy of the information
                  which is contained in the stream.  Thus this info must remain
                  intact until after the data entry is complete.
SeeAlso: #00439,#00446

(Table 00441)
Values for TopView logical attributes:
 01h    normal text
 02h    highlighted normal text
 03h    help text
 04h    highlighted help text
 05h    error message
 06h    highlighted error message
 07h    emphasized text
 08h    marked text
 9-16   reverse video versions of 1-8
SeeAlso: #00440

Format of TopView field table header:
Offset  Size    Description     (Table 00442)
 00h    BYTE    number of fields (must be <= existing number of fields)
 01h    BYTE    screen behavior bits (see #00443)
 02h    BYTE    current input field (updated by DESQview)
 03h    BYTE    current select field (updated by DESQview)
 04h    BYTE    attribute for select fields when they are pointed at
 05h    BYTE    attribute for select fields which have been selected
SeeAlso: #00440,#00444

Bitfields for TopView screen behavior bits:
Bit(s)  Description     (Table 00443)
 7      reserved
 6      menu items may be selected via keyboard
 5      left mouse button in "status" mode (press anywhere in window
          immediately returns control to application)
 4      right mouse button in "status" mode
 3      select fields return contents or blanks rather than 'Y' or 'N'
 2      modified bits reset on return to application
 1-0    type of data returned
        00 no data returned on read of keyboard
        01 data returned as array of characters containing all fields packed
              together, with no field numbers
        10 data returned as numbered variable-length records for all fields
        11 data returned as numbered variable-length records for the fields
              which were modified
SeeAlso: #00440

Format of TopView field table entry:
Offset  Size    Description     (Table 00444)
 00h    BYTE    start row    \
 01h    BYTE    start column  \ if menu selection and start is to
 02h    BYTE    end row       / right or below end, select from kbd only
 03h    BYTE    end column   /
 04h    BYTE    field type (see #00445)
 05h    BYTE    modifier
                if type is fill-in, then bit flags to determine behavior
                  bit 7  automatically enter CR when field full
                  bit 6  move to next field when current field is full
                  bit 5  enter text from right end (for numbers)
                  bit 4  force input to uppercase
                  bit 3  clear old contents on first keystroke
                  bit 2  input returned when cursor moves out of
                          modified field ("validate", API level 2.02+)
                  bit 1  reserved
                  bit 0  reserved
                if select field, first key to press to activate
                  00h if have to point-&-click or is an extended-ASCII
                      keystroke (only if two-key menus enabled)
 06h    BYTE    (select field only) normal color of field
 07h    BYTE    second key for select field.  This byte is present iff
                  two-letter menu entries selected with opcode E5h, and in that
                  case is present regardless of field type
SeeAlso: #00442

Bitfields for TopView field type:
Bit(s)  Description     (Table 00445)
 7,6    field class
        00 inactive (non-entry) field
        01 echos keystrokes input to make menu selection
        10 fill-in field
        11 select field
 5      field can be filled by broadcast write (F7h opcode)
 4      reserved
 3      reserved
 2      reserved
 1      set if field selected
 0      set if field modified
SeeAlso: #00444

(Table 00446)
Values for MODE 01h "QUERY STREAM" opcodes:
(valid only for those opcodes listed here)
 A0h return logical cursor row in next byte
 A1h return logical cursor column in next byte
 A2h return top row of scrolling region in next byte
 A3h return left column of scrolling region in next byte
 A4h return row of physical window origin in next byte
 A5h return column of physical window origin in next byte
 A6h return height of physcial window in next byte
 A7h return width of physical window in next byte
 A8h return row of viewport origin in next byte
 A9h return column of viewport origin in next byte
 AAh return height of virtual screen in next byte
 ABh return width of virtual screen in next byte
 AFh return current video mode in next byte
 C0h return current logical cursor position in next two bytes
 C1h return top left corner of scrolling region in next two bytes
 C2h return current window position in next two bytes
 C3h return current window size in next two bytes
 C4h return current viewport origin in next two bytes
 C5h return current virtual screen size in next two bytes
 D0h \ overwritten with D0h if frames may fall off screen edge
 D1h /                 D1h if frames always displayed entirely
 D2h \ overwritten with D2h if DESQview controls color palette
 D3h /                 D3h if application changes color palette
 D4h \ overwritten with D4h if window visible
 D5h /                 D5h if window hidden
 D6h \ overwritten with D6h if window has frame
 D7h /                 D7h if window unframed
 D8h \ overwritten with D8h if reading characters from window
 D9h /                 D9h if reading attributes from window
 DAh \ overwritten with DAh if using logical attributes
 DBh /                 DBh if using physical attributes
 DCh \ overwritten with DCh if TTY control char interpretation on
 DDh /                 DDh if TTY control char interpretation off
 DEh \ overwritten with DEh if writing both characters and attributes
 DFh /                 DFh if leaving attributes untouched
 E2h return current color in next byte
 ECh get logical attributes for window contents
        BYTE execute call if currently in specified video mode
                bit 7   monochrome
                bit 6   color text, EGA/VGA graphics
                bit 5   medium-resolution CGA graphics
                bit 4   high-resolution CGA graphics
        BYTE which attributes to get
                bit 7   unused???
                bits 4-6 first attribute to get - 1
                bits 0-3 number of consecutive attributes
        N BYTEs buffer to hold attributes
 EDh get logical attributes for window frame
        BYTE execute call if currently in video mode (also see opcode ECh)
        BYTE which attributes to get
                bit 7   unused???
                bits 4-6 first attribute to get - 1
                bits 0-3 number of consecutive attributes
        N BYTEs buffer to hold attributes
 EEh get characters for window frame
        BYTE execute call if currently in video mode (also see opcode ECh)
        BYTE which attributes to get
                bit 7   unused???
                bits 4-6 first char to get - 1
                bits 0-3 number of consecutive chars
        N BYTEs buffer to hold chars
 EFh return first N characters of current window name
        BYTE    max length of returned name
        N BYTEs buffer to hold window name
 F3h return contents of specified field
        BYTE field number
        N BYTEs buffer to hold field contents (size equal to field size)
 F5h get field table entry
        BYTE field number
        7-8 BYTEs buffer to hold field table entry (see #00444)
        Notes:  DV < 2.26 always returns 7 bytes
                DV 2.26+ w/ APILEVEL < 2.26 returns 8 bytes iff field table
                  is using 8-byte entries and eighth byte after F5h is E7h
                  (NOP); otherwise, 7 bytes are returned
                DV 2.26+ w/ APILEVEL > 2.26 returns 7 or 8 bytes depending
                  on the field table entry size
 F6h get type of a field
        BYTE field number
        BYTE type
 FCh get field table header
        6 BYTEs buffer to store field table header (see #00442)
SeeAlso: #00439,#00447

(Table 00447)
Values for MODE 10h "MANAGER STREAM" opcodes (valid only for those listed):
 00h allow window to be moved horizontally
 01h allow window to be moved vertically
 02h allow window to change width
 03h allow window to change height
 04h allow window to be scrolled horizontally
 05h allow window to be scrolled vertically
 06h allow "Close Window" menu selection for application
 07h allow "Hide Window" menu selection for application
 08h allow application to be suspended ("Rearrange/Freeze")
 0Eh allow "Scissors" menu
 10h allow DESQview main menu to be popped up
 11h allow "Switch Windows" menu
 12h allow "Open Window" menu
 13h allow "Quit" menu selection
 20h-33h opposite of 00h-13h, disallow specified action
 40h notify if horizontal position of window changes
 41h notify if vertical position of window changes
 42h notify if width of window changes
 43h notify if height of window changes
 44h notify if window scrolled horizontally
 45h notify if window scrolled vertically
 46h notify if window is closed--program has to clean up and exit itself
 47h notify if window is hidden
 48h notify if "?" on main menu selected
 49h notify if pointer message sent to window
 4Ah notify if window is placed in foreground
 4Bh notify if window is placed in background
 4Ch notify if video mode changes
 4Dh notify if "Scissors" menu "Cut" option selected
 4Eh notify if "Scissors" menu "Copy" option selected
 4Fh notify if "Scissors" menu "Paste" option selected
 50h notify if DESQview main menu about to pop up
 51h notify if DESQview main menu popped down
 60h-71h         opposite of 40h-51h: don't notify on specified event
 84h attach window to parent task's window (both move together)
 85h detach window from parent task's window (may move independently)
 86h disable background operation for application
 87h enable running in background
 88h set minimum size of physical window
        BYTE rows
        BYTE columns
 89h set maximum size of physical window
        BYTE rows
        BYTE cols
 8Ah set primary asynchronous notification routine (see #00449)
        DWORD address of routine, 0000h:0000h means none (see also below)
 8Bh set async notification parameter
        DWORD 32-bit value passed to 8Ah async routine in DS:SI
 ACh (DV2.2+) perform regular select field attribute processing
 ADh (DV2.2+) protect attributes in selected field from being lost
 AEh make window default notify window for owning app (API level 2.00+)
 AFh set selected field marker character
        BYTE character to display at left edge of selected fields
 BCh set standard field processing mode
 BDh set alternate field processing mode (enables cursor pad for menus)
 BEh disables changing reverse logical attributes with ECh opcode
 BFh enables changing reverse logical attributes with ECh opcode
 C0h make current window topmost in system
 C1h force current process into foreground
 C2h make current window topmost in process
 C3h position mouse pointer relative to origin of current field
        BYTE rows below upper left corner of field
        BYTE columns to right of upper left corner of field
 C4h position mouse pointer relative to origin of given field
        BYTE field number
        BYTE rows below upper left corner of field
        BYTE columns to right of upper left corner of field
 C5h orphan current window (also hides it)
        Note: must be last in stream; all subsequent commands ignored
 C6h show all windows for this process
 C7h hide all windows for this process
 C8h suspend process and hide all its windows
 C9h force current process into background
 CAh make current window bottom-most in process
 CBh cancel current window manager operation, remove DV menu, give control
          to topmost application
 CCh orphan window and give it to the system for use as paste data
 CEh reorder windows
        DWORD pointer to null-terminated list of words; each word is segment
                  of object handle for a window
 FFh no operation
SeeAlso: #00439,#00446,#00448

(Table 00448)
Values for MODES 14h to 1Fh "USER STREAMS":
        normally NOPs, but may be defined by SETESC message to invoke FAR
        routines, one for each mode number
          on entry to handler,
                DS:SI -> first byte of actual stream (not header)
                CX = number of bytes in stream
                ES:DI = window's handle
SeeAlso: #00446,#00447

(Table 00449)
Values asynchronous notification routine defined by man.stream 8Ah called with:
        ES:DI = handle of window
        DS:SI is 32-bit value set by 8Bh manager stream opcode
           mailbox contains message indicating event
              Opcode
               40h  horizontal movement
                   DWORD object handle of window
                   BYTE  new row
                   BYTE  new col
               41h  vertical movement
                   DWORD object handle of window
                   BYTE  new row
                   BYTE  new col
               42h  horizontal size change
                   DWORD object handle of window
                   BYTE  new rows
                   BYTE  new cols
               43h  vertical size change
                   DWORD object handle of window
                   BYTE  new rows
                   BYTE  new cols
               44h  scrolled horizontally
                   DWORD object handle of window
                   BYTE  mouse row within window
                   BYTE  mouse column within window
                   BYTE  field mouse is on, 0 if none
                   BYTE  amount moved: >0 right, <0 left, 0 done
               45h  scrolled vertically
                   DWORD object hande of window
                   BYTE  mouse row within window
                   BYTE  mouse column within window
                   BYTE  field mouse is on, 0 if none
                   BYTE  amount moved: >0 down, <0 up, 0 done
               46h  window close request
                   DWORD object handle of window
                   BYTE  mouse pointer row
                   BYTE  mouse pointer column
                   BYTE  field mouse is on, 0 if none
               47h  application's windows hidden
               48h  Help for Program selected
                   DWORD object handle of window
                   BYTE  mouse pointer row
                   BYTE  mouse pointer column
                   BYTE  field mouse is on, 0 if none
               49h  pointer message sent to window
                   DWORD pointer handle which received message
               4Ah  switched to window from another ("raise")
               4Bh  switched away from the window ("lower")
               4Ch  video mode changed
                   BYTE new BIOS video mode
               4Dh  Scissors/cUt selected
                   DWORD object handle of window
                   BYTE  row of upper left corner
                   BYTE  column of upper left corner
                   BYTE  field number ul corner is in, 0=none
                   DWORD handle of orphaned window created with
                         copy of data from specified region
                   BYTE  height of region
                   BYTE  width of region
               4Eh  Scissors/Copy selected
                   DWORD object handle of window
                   BYTE  row of upper left corner
                   BYTE  column of upper left corner
                   BYTE  field number ul corner is in, 0=none
                   DWORD handle of orphaned window created with
                         copy of data from specified region
                   BYTE  height of region
                   BYTE  width of region
               4Fh  Scissors/Paste selected
                   DWORD object handle of window
                   BYTE  row of upper left corner
                   BYTE  column of upper left corner
                   BYTE  field number ul corner is in, 0=none
                   DWORD handle of orphaned window with data
                   BYTE  height of region
                   BYTE  width of region
                        Note: orphaned data window should be adopted or freed
                                when done
               50h  main menu about to pop up
               51h  main menu popped down
Return: all registers unchanged
--------Q-1512--BH06-------------------------
INT 15 - DESQview 2.20+ - SEND MESSAGE - "SETPRI" - SET PRIORITY WITHIN OBJECTQ
        AH = 12h
        BH = 06h
        BL = object
            00h object handle in DWORD on top of stack
                mailbox, keyboard, pointer, or timer
                (DV 2.50+) window
            01h (DV 2.50+) current task's window
            04h given task's keyboard (task's handle on top of stack)
            05h current task's default keyboard
        STACK: DWORD new priority of object in task's OBJECTQ
                        (new priority of task if window handle)
Return: STACK popped
Notes:  initially all objects have the same default value.  Should only make
          relative adjustments to this default value.
        when changing priorities, all objects already on the objectq are
          reordered
        for window handles, only the non-blocked task(s) with the highest
          priority receive CPU time under DESQview 2.50-2.52; the default
          priority is 0Ah
SeeAlso: AH=12h/BH=07h,AH=12h/BH=87h
--------Q-1512--BH07-------------------------
INT 15 - DESQview 2.20+ - SEND MESSAGE - "GETPRI" - GET PRIORITY WITHIN OBJECTQ
        AH = 12h
        BH = 07h
        BL = object
            00h object handle in DWORD on top of stack
                mailbox, keyboard, pointer, or timer
                (DV 2.50+) window
            01h (DV 2.50+) current task's window
            04h given task's keyboard (task's handle on top of stack)
            05h current task's default keyboard
Return: STACK: DWORD object priority
Note:   initially all objects have the same default value.  Should only make
          relative adjustments to this default value.
SeeAlso: AH=12h/BH=06h
--------Q-1512--BH08-------------------------
INT 15 - TopView - SEND MESSAGE - "SIZEOF" - GET OBJECT SIZE
        AH = 12h
        BH = 08h
        BL = object
            00h handle in DWORD on top of stack
                window: total character positions in window
                timer: elapsed time since timer started
                pointer: number of messages queued to pointer object
                panel: number of panels in panel file
                keyboard: number of input buffers queued
            01h total chars in current task's default window
            02h number of messages in task's mailbox (task's handle on stack)
            03h number of messages in current task's mailbox
            04h number of input buffers queued in task's kbd (handle on stack)
            05h number of input buffers queued for current task's default kbd
            06h number of objects queued in OBJECTQ (task's handle on stack)
            07h number of objects queued in current task's OBJECTQ
            0Ch (DV 2.26+) total chars in window owning handle on top of stack
            0Dh (DV 2.26+) total chars in parent task's window
Return: DWORD on top of stack is result (any handle on stack has been popped)
Note:   for panel objects, a count of zero is returned if no panel file is open
          for the object
SeeAlso: AH=12h/BH=04h,AH=12h/BH=09h
--------Q-1512--BH09-------------------------
INT 15 - TopView - SEND MESSAGE - "LEN" - GET OBJECT LENGTH
        AH = 12h
        BH = 09h
        BL = object
            00h handle in DWORD on top of stack
                window: get chars/line
                timer: get 1/100 seconds remaining before timer expires
                mailbox: (DV/X) get number of bytes queued to mailbox
            01h get number of chars/line in current task's default window
            0Ch (DV 2.26+) get chars/line in window owning handle on top of stk
            0Dh (DV 2.26+) get chars/line in parent task's window
Return: DWORD on top of stack is length (any handle on stack has been popped)
SeeAlso: AH=12h/BH=08h
--------Q-1512--BH0A-------------------------
INT 15 - TopView - SEND MESSAGE - "ADDTO" - WRITE CHARS AND ATTRIBS TO WINDOW
        AH = 12h
        BH = 0Ah
        BL = window to write to
            00h window handle is DWORD on top of stack
            01h current task's default window
            0Ch (DV 2.26+) default window of task owning handle on top of stack
            0Dh (DV 2.26+) default window of parent of current task
        STACK:  DWORD count of attributes
                DWORD address of attribute string
                DWORD count of characters
                DWORD address of character string
Return: STACK popped
Notes:  if one string is longer than the other, the shorter one will be reused
          until the longer one is exhausted
        the cursor is left just after the last character written
SeeAlso: AH=12h/BH=0Bh"WINDOW"
--------Q-1512--BH0A-------------------------
INT 15 - TopView - SEND MESSAGE - "ADDTO" - SEND MAILBOX MESSAGE/STAT BY VALUE
        AH = 12h
        BH = 0Ah
        BL = mailbox to write to
            00h handle is DWORD on top of stack
            02h default mailbox of task whose handle is on top of stack
            03h current task's default mailbox
        STACK:  DWORD   status (low byte)
                DWORD   length of message
                DWORD   address of message
Return: STACK popped
Notes:  the message is copied into either system or common memory
        insufficient memory normally causes the process to be aborted; under
          DESQview 2.2+, failed writes may return CF set instead (see AX=DE15h)
SeeAlso: AH=12h/BH=0Bh"MAILBOX"
--------Q-1512--BH0A-------------------------
INT 15 - TopView - SEND MESSAGE - "ADDTO" - SET OBJECT BITS
        AH = 12h
        BH = 0Ah
        BL = object
            00h handle is DWORD on top of stack
                timer: start timer for specified interval
                pointer: set control flags (see #00451)
                keyboard: set control flags (see #00450)
            04h set control flags on KEYBOARD object (handle on top of stack)
            05h set control flags on task's default KEYBOARD object
        STACK: (if timer)   DWORD duration in 1/100 seconds
               (otherwise)  DWORD bits to set
Return: STACK popped
SeeAlso: AH=12h/BH=0Bh"OBJECT"

Bitfields for DESQview keyboard object bits:
Bit(s)  Description     (Table 00450)
 15     reserved, can't be set
 14     unused
 13     reserved, can't be set
 12-6   unused
 5      (DV 2.2+) exclusive input
 4      filter all keys (used with handler established by SETESC)
        if 0, only keys that would normally be displayed are filtered
 3      program continues executing while input in progress
 2      insert mode active for field mode
 1      hardware cursor displayed when task is hardware cursor owner
        must be set if keyboard in field mode and field table includes input
          fields
 0      keyboard is in field mode rather than keystroke mode

Bitfields for DESQview pointer object bits:
Bit(s)  Description     (Table 00451)
 15     reserved, can't be set
 14-8   unused
 7      mouse pointer is hidden while in window
 6      get messages even if window not topmost
 5      get messages even if window not foreground
 4      multiple clicks separated by less than 1/3 second are counted and
          returned in a single message
 3      pointer position is relative to screen origin, not window origin
 2      send message on button release as well as button press
 1      (DV 2.23+) send message with row=FFFFh and col=FFFFh whenever the
          pointer leaves the window
 0      send message only on button activity, not movement
        DV-specific, and INT 15/AX=DE0Fh must have been called first
--------Q-1512--BH0B-------------------------
INT 15 - TopView - SEND MESSAGE - "SUBFROM" - WRITE ATTRIBUTES TO WINDOW
        AH = 12h
        BH = 0Bh
        BL = window to write attributes to
            00h handle is DWORD on top of stack
            01h current task's default window
            0Ch (DV 2.26+) default window of task owning handle on top of stack
            0Dh (DV 2.26+) default window of parent of current task
        STACK:  DWORD number of attributes to write
                DWORD address of attributes
Return: STACK popped
Note:   the attributes are written starting at the current cursor position; the
          cursor is left just after the last position written
SeeAlso: AH=12h/BH=0Ah"WINDOW"
--------Q-1512--BH0B-------------------------
INT 15 - TopView - SEND MESSAGE - "SUBFROM" - SEND MAILBOX MESSAGE/STAT BY REF
        AH = 12h
        BH = 0Bh
        BL = mailbox to write to
            00h handle is DWORD on top of stack
            02h default mailbox of task whose handle is on top of stack
            03h current task's default mailbox
        STACK:  DWORD   status (low byte)
                DWORD   length of message
                DWORD   address of message
Return: STACK popped
Notes:  only a pointer to the message is stored, but the write may still fail
          due to insufficient memory
        under DV 2.2+, failed mailbox writes may return CF set (see AX=DE15h)
SeeAlso: AH=12h/BH=0Ah"MAILBOX"
--------Q-1512--BH0B-------------------------
INT 15 - TopView - SEND MESSAGE - "SUBFROM" - REMOVE OBJECT FROM OBJECTQ
        AH = 12h
        BH = 0Bh
        BL = OBJECTQ from which to remove all copies of a particular object
            06h OBJECTQ of task whose handle is on top of stack
            07h task's default OBJECTQ
        STACK:  DWORD   handle of object to remove
Return: STACK popped
Note:   should be sent whenever an object is erased or closed
--------Q-1512--BH0B-------------------------
INT 15 - TopView - SEND MESSAGE - "SUBFROM" - RESET OBJECT BITS
        AH = 12h
        BH = 0Bh
        BL = object
            00h handle is DWORD on top of stack
                pointer: reset control flags
                keyboard: reset control flags
            04h clear control flags on KEYBOARD object (handle on top of stack)
            05h clear control flags on task's default KEYBOARD object
        STACK:  DWORD   which bits to clear (see #00450,#00451)
Return: STACK popped
SeeAlso: AH=12h/BH=0Ah"OBJECT"
--------Q-1512--BH0C-------------------------
INT 15 - TopView - SEND MESSAGE - "OPEN" - OPEN OBJECT
        AH = 12h
        BH = 0Ch
        BL = object
            00h handle is DWORD on top of stack
                window:   fill with given character from scroll origin to end
                keyboard: attach to a window
                timer:    open
                pointer:  start taking input for window
                panel:    associate with a panel file
            01h fill task's default window with given char from scrl org to end
            02h open given task's mailbox for input (task's handle on stack)
            03h open current task's mailbox
            04h attach a KEYBOARD to a window (handle on top of stack)
            05h attach task's default KEYBOARD to a window
            06h open a task's OBJECTQ (task's handle on top of stack)
            07h open current task's OBJECTQ
            0Ch (DV 2.26+) fill def window of task owning handle on top of stck
            0Dh (DV 2.26+) fill default window of parent of current task
         STACK: (if window)   DWORD character to fill with
                (if keyboard) DWORD handle of window to attach to
                (if pointer)  DWORD handle of window to attach to
                (if panel)    DWORD length of filename or resident panel
                              DWORD address of filename or resident panel
                (otherwise)   nothing
Return: STACK popped
Notes:  if first byte of panel file name is 1Bh, then the "name" IS a panel
        if first two bytes of panel file "name" are C0hC3h, then the "name" IS
          the panel file
        result code of open may be retrieved with STATUS message
        logical cursor is left at scroll origin after filling window
        the task opening a mailbox becomes its owner, and the only task allowed
          to read the mailbox
        messages are only sent to a pointer object when the mouse is positioned
          in the window to which the pointer has been attached
        there is no need to explicitly open a timer object, as ADDTO and WRITE
          messages automatically open the timer
SeeAlso: AH=12h/BH=0Dh,AH=12h/BH=14h"LOCK"
--------Q-1512--BH0D-------------------------
INT 15 - TopView - SEND MESSAGE - "CLOSE" - CLOSE OBJECT
        AH = 12h
        BH = 0Dh
        BL = object
            00h handle is DWORD on top of stack
                timer:    close
                keyboard: detach from window and discard queued input
                pointer:  stop taking input
                panel:    close
                mailbox:  close, unlock, and discard any pending messages
            02h close given task's mailbox (task's handle on top of stack)
            03h close task's default mailbox
            04h close KEYBOARD object (handle on top of stack)
            05h close task's default KEYBOARD
            06h close given task's OBJECTQ (task's handle on top of stack)
            07h close current task's OBJECTQ
Return: STACK popped if handle passed on stack
Notes:  when an OBJECTQ is closed, each object in the OBJECTQ is sent an
          ERASE message (AH=12h/BH=0Eh)
        when a panel object is closed, the panel file and any panels currently
          in use are freed; window and keyboard objects created by APPLY are
          not affected, but field mode input ceases
        open but idle timer objects consume a small amount of CPU time
SeeAlso: AH=12h/BH=0Ch,AH=12h/BH=0Eh,AH=12h/BH=14h"LOCK"
--------Q-1512--BH0E-------------------------
INT 15 - TopView - SEND MESSAGE - "ERASE" - ERASE OBJECT
        AH = 12h
        BH = 0Eh
        BL = object
            00h handle is DWORD on top of stack
                window:   clear from scroll origin to end of window
                keyboard: discard input
                timer:    cancel current interval
                pointer:  discard all pending messages
                mailbox:  discard all pending messages
            01h clear task's default window from scroll origin to end
            02h discard all queued messages in mailbox (handle on top of stack)
            03h discard all queued messages in current task's default mailbox
            04h discard all input queued to KEYBOARD (handle on top of stack)
            05h discard all input queued to task's default KEYBOARD
            06h remove all objects from OBJECTQ (task's handle on top of stack)
            07h remove all objects from current task's OBJECTQ
            0Ch (DV 2.26+) clear window of task owning handle on top of stack
            0Dh (DV 2.26+) clear default window of parent of current task
Return: STACK popped if handle passed on stack
Note:   when an OBJECTQ is erased, each object in the OBJECTQ is also erased
SeeAlso: AH=12h/BH=02h
--------Q-1512--BH0F-------------------------
INT 15 - TopView - SEND MESSAGE - "STATUS" - GET OBJECT STATUS
        AH = 12h
        BH = 0Fh
        BL = object
            00h handle is DWORD on top of stack
                timer:   is it running?
                pointer: return status of last message
                panel:   verify success of last OPEN or APPLY
            02h return status of last msg READ from mailbox (handle on stack)
            03h return status of last msg READ from task's default mailbox
            04h get stat of last msg from task's KEYBOARD (task handle on stk)
            05h get status of last msg from task's default KEYBOARD
            06h return whether OBJECTQ is open or not (handle on top of stack)
            07h return whether task's default OBJECTQ is open or not
Return: DWORD on top of stack is status (any handle passed on stack popped)
Notes:  if object is a panel object, the status indicates the error code:
          00h successful
          14h panel name not in panel directory
          15h not enough memory to apply panel
          16h invalid panel format
          17h panel file already open
          81h-92h  DOS error codes+80h                  \  codes > 80h indicate
          95h not enough memory to open panel file       > that the panel was
          98h null panel file name                      /  not opened
        if object is a timer, the status is:
          00000000h open but not running
          40000000h open and running
          80000000h closed
        if object is an OBJECTQ, the status is:
          00000000h open
          80000000h closed
        if object is a keyboard in keystroke mode, the status is the extended
          character code (scan code) of the last keystroke
        if object is a keyboard in field mode, the status indicates the reason
          for the last return from the field manager
          00h Enter key pressed
          01h Button 1 or keystroke selection
          02h Button 2
          03h validation
          04h auto Enter on field
          1Bh Escape pressed
          46h ^Break pressed
          other: extended code for key terminating input
        the status of mailbox messages sent by the window manager is always 80h
        the status of a pointer message is the same as the status field in the
          message
SeeAlso: AH=12h/BH=04h"READ"
--------Q-1512--BH10-------------------------
INT 15 - TopView - SEND MESSAGE - "EOF" - GET OBJECT EOF STATUS
        AH = 12h
        BH = 10h
        BL = object
            00h handle is DWORD on top of stack
                window: return TRUE if logical cursor past end of window
                mailbox: ???
            01h returns TRUE if logical cursor past end of task's def window
            02h return ??? for task's mailbox (task's handle on top of stack)
            03h return ??? for current task's mailbox
            0Ch (DV 2.26+) check log crsr of window owning handle on top of stk
            0Dh (DV 2.26+) check log cursor of window of parent task
Return: DWORD on top of stack is status (any handle on stack has been popped)
--------Q-1512--BH11-------------------------
INT 15 - TopView - SEND MESSAGE - "AT" - POSITION OBJECT CURSOR
        AH = 12h
        BH = 11h
        BL = window for which to move cursor
            00h window's handle is DWORD on top of stack
            01h task's default window
            0Ch (DV 2.26+) default window of task owning handle on top of stack
            0Dh (DV 2.26+) default window of parent of current task
        STACK: DWORD column
               DWORD row
Return: STACK popped
--------Q-1512--BH11-------------------------
INT 15 - TopView - SEND MESSAGE - "SETNAME" - ASSIGN NAME TO MAILBOX
        AH = 12h
        BH = 11h
        BL = mailbox to name
            00h DWORD on top of stack is mailbox handle
            02h use given task's mailbox (task's handle on top of stack)
            03h use current task's default mailbox
        STACK: DWORD length of name
               DWORD address of name
Return: STACK popped
SeeAlso: AH=12h/BH=12h"GETNAME",AX=DE0Eh
--------Q-1512--BX1100-----------------------
INT 15 - TopView - SEND MESSAGE - "SETSCALE" - SET POINTER SCALE FACTOR
        AH = 12h
        BX = 1100h
        STACK: DWORD object handle for pointer object
               DWORD number of colums to scale pointer position to
               DWORD number of rows to scale pointer position to
Return: STACK popped
SeeAlso: AH=12h/BX=1200h
--------Q-1512--BH12-------------------------
INT 15 - TopView - SEND MESSAGE - "READN" - GET NEXT N OBJECT BYTES
        AH = 12h
        BH = 12h
        BL = window to read from
            00h handle is DWORD on top of stack
            01h read next N chars or attributes on task's default window
            0Ch (DV 2.26+) read window of task owning handle on top of stack
            0Dh (DV 2.26+) read default window of parent of current task
        STACK: DWORD count
Return: STACK: DWORD number of bytes actually read
               DWORD address of buffer containing data
Notes:  reading starts at the current logical cursor position; the cursor is
          updated to point at the character following the last one read
        any translucent blanks (FFh) which are visible on screen are changed
          to the character which is seen through them
        the string produced by the read is placed in an input buffer which may
          be reused by the next READ or READN of a window
        window stream opcodes D8h and D9h determine whether the read returns
          characters or attributes
SeeAlso: AH=12h/BH=04h"WINDOW",AH=12h/BH=05h"WINDOW"
--------Q-1512--BH12-------------------------
INT 15 - DESQview 2.50+ - SEND MESSAGE - "GETNAME" - GET NAME OF MAILBOX
        AH = 12h
        BH = 12h
        BL = mailbox for which to retrieve name
            00h DWORD on top of stack is mailbox handle
            02h use given task's mailbox (task's handle on top of stack)
            03h use current task's default mailbox
        STACK: DWORD length of buffer for name
               DWORD pointer to buffer
Return: STACK: DWORD length of returned name (or size of buffer, if less)
Program: DESQview 2.5x is distributed as part of DESQview/X 1.0x
Note:   the returned name is not NUL-terminated
SeeAlso: AH=12h/BH=11h"SETNAME",AX=DE0Eh
--------Q-1512--BX1200-----------------------
INT 15 - TopView - SEND MESSAGE - "GETSCALE" - GET POINTER SCALE FACTOR
        AH = 12h
        BX = 1200h
        STACK: DWORD object handle for pointer
Return: STACK: DWORD pointer pos scaled as if window were this many colums wide
               DWORD pointer pos scaled as if window were this many rows high
SeeAlso: AH=12h/BX=1100h
--------Q-1512--BH13-------------------------
INT 15 - TopView - SEND MESSAGE - "REDRAW" - REDRAW WINDOW
        AH = 12h
        BH = 13h
        BL = window object
            00h DWORD on top of stack is handle for window to redraw
            01h redraw task's default window
            0Ch (DV 2.26+) redraw window of task owning handle on top of stack
            0Dh (DV 2.26+) redraw default window of parent of current task
Return: STACK popped if handle was passed on stack
SeeAlso: AH=12h/BH=05h"WINDOW",AH=12h/BH=0Eh
--------Q-1512--BH13-------------------------
INT 15 - DESQview 2.50+ - SEND MESSAGE - "READINTO" - GET NEXT MAIL MESSAGE
        AH = 12h
        BH = 13h
        BL = mailbox from which to read
            00h DWORD on top of stack is mailbox handle
            02h use given task's mailbox (task's handle on top of stack)
            03h use current task's default mailbox
        STACK: DWORD size of buffer in bytes
               DWORD pointer to buffer
Return: STACK: DWORD number of bytes read
Program: DESQview 2.5x is distributed as part of DESQview/X 1.0x
Notes:  this call blocks if no input is available, but will return less than
          the requested number of bytes if some (but insufficient) data is
          available
        use this call instead of AH=12h/BH=04h if the mailbox has flag bits
          4 or 5 set, as common memory may be exhausted by that call when
          attempting to read the next message
SeeAlso: AH=12h/BH=04h"READ",AH=12h/BH=05h,AH=12h/BH=16h
--------Q-1512--BX1300-----------------------
INT 15 - TopView - SEND MESSAGE - "SETICON" - SPECIFY POINTER ICON
        AH = 12h
        BX = 1300h
        STACK: DWORD object handle for pointer
               DWORD character to use for pointer
Return: STACK popped
--------Q-1512--BH14-------------------------
INT 15 - TopView - SEND MESSAGE - "SETESC" - SET ESCAPE ROUTINE ADDRESS
        AH = 12h
        BH = 14h
        BL = message modifier
            00h handle is DWORD on top of stack
            01h define user stream
            04h intercept keystrokes from KEYBOARD to window (handle on stack)
            05h intercept keystrokes from task's default KEYBOARD to a window
        STACK: (if window)   DWORD user stream number (14h-1Fh)
                             DWORD address of FAR user stream handler
               (if keyboard) DWORD address of FAR filter function (see #00452)
Return: STACK popped

(Table 00452)
Values keyboard filter function is called with when keyboard is in field mode:
        AL = character
        AH = 00h or extended ASCII code if AL = 00h
        BL = field number
        CH = cursor column
        CL = cursor row
        DL = field type modifier (sixth item in field table entry)
        DH = seventh item in field table entry
        ES:SI = window's handle
        DS:DI -> field table entry for field containing the cursor
Return: AH = action to take
            00h use keystroke
            01h ignore keystroke
            FFh beep and ignore keystroke
Note: the filter function is not allowed to make INT 15, DOS, or BIOS calls
--------Q-1512--BH14-------------------------
INT 15 - TopView - SEND MESSAGE - "LOCK" - REQUEST EXCLUSIVE ACCESS TO RESOURCE
        AH = 12h
        BH = 14h
        BL = object
            00h mailbox handle is DWORD on top of stack
            02h use given task's mailbox (task's handle on top of stack)
            03h use current task's default mailbox
Return: STACK popped if BL=00h
Note:   release exclusive access by sending CLOSE message to mailbox
        access may be requested multiple times, and requires multiple CLOSEs
SeeAlso: AH=12h/BH=0Dh
--------Q-1512--BH15-------------------------
INT 15 - DESQview v2.20+ - SEND MESSAGE - "SETFLAGS" - SET OBJECT FLAGS
        AH = 12h
        BH = 15h
        BL = object
            00h DWORD on top of stack
                mailbox, keyboard, or pointer only
            02h mailbox for task whose handle is on top of stack
            03h mailbox for current task
            04h keyboard for task whose handle is on top of stack
            05h keyboard for current task
        STACK: DWORD flags (see #00453,#00454)
Return: STACK popped
Notes:  only available if the API level has been set to at least 2.20
        equivalent to performing SUBFROM and ADDTO calls on the object
        if a mailbox has bits 4 or 5 set, you must use "READINTO" rather than
          "READ" (see AH=12h/BH=13h"READINTO") to retrieve messages
SeeAlso: AH=12h/BH=0Ah,AH=12h/BH=0Bh,AH=12h/BH=16h

Bitfields for DESQview mailbox object flags:
Bit(s)  Description     (Table 00453)
 0      all mail messages in common memory
 1      allow write even if closed
 2      don't erase messages when mailbox closed
 4      (DV/X) append messages with like status and sender (stream-oriented
          mail)
 5      (DV/X) store mail in expanded memory (pool grows as needed)
 6      (DV/X) make mailbox into non-owned mailbox

Bitfields for DESQview keyboard object flags:
Bit(s)  Description     (Table 00454)
 5      exclusive input when keyboard in use for input
--------Q-1512--BH16-------------------------
INT 15 - DESQview v2.20+ - SEND MESSAGE - "GETFLAGS" - GET OBJECT FLAGS
        AH = 12h
        BH = 16h
        BL = object
            00h DWORD on top of stack
                mailbox, keyboard, or pointer only
            02h mailbox for task whose handle is on top of stack
            03h mailbox for current task
            04h keyboard for task whose handle is on top of stack
            05h keyboard for current task
Return: STACK: DWORD current control flags (see #00453,#00454)
Notes:  only available if the API level has been set to at least 2.20
        if a mailbox has bits 4 or 5 set, you must use "READINTO" rather than
          "READ" (see AH=12h/BH=13h"READINTO") to retrieve messages
SeeAlso: AH=12h/BH=0Ah,AH=12h/BH=0Bh,AH=12h/BH=13h"READINTO",AH=12h/BH=15h
--------Q-1512--BH17-------------------------
INT 15 - DESQview v2.42-2.52 - BUG
        AH = 12h
        BH = 17h
        BL = object
            00h DWORD on top of stack
                mailbox, keyboard, or pointer only
            02h mailbox for task whose handle is on top of stack
            03h mailbox for current task
            04h keyboard for task whose handle is on top of stack
            05h keyboard for current task
Return: STACK popped if handle passed on stack
Notes:  due to a fencepost error, message 17h is accepted for mailboxes,
          keyboards, and pointers, but causes a random branch
        DESQview v2.50-2.52 are distributed as part of DESQview/X v1.02
--------Q-1512--BH80-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 00h WITH ERROR RECOVERY
        AH = 12h
        BH = 80h
Note:   this function is identical to AH=12h/BH=00h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=00h

(Table 00455)
Values for DESQview error code:
 00h    no error
 01h    invalid values
 02h    alias invalid
 03h    handle valid but wrong type
 04h    invalid handle
--------Q-1512--BH81-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 01h WITH ERROR RECOVERY
        AH = 12h
        BH = 81h
Note:   this function is identical to AH=12h/BH=01h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=01h
--------Q-1512--BH82-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 02h WITH ERROR RECOVERY
        AH = 12h
        BH = 82h
Note:   this function is identical to AH=12h/BH=02h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=02h
--------Q-1512--BH83-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 03h WITH ERROR RECOVERY
        AH = 12h
        BH = 83h
Note:   this function is identical to AH=12h/BH=03h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=03h,AH=12h/BX=0300h
--------Q-1512--BH84-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 04h WITH ERROR RECOVERY
        AH = 12h
        BH = 84h
Note:   this function is identical to AH=12h/BH=04h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=04h,AH=12h/BX=0400h
--------Q-1512--BH85-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 05h WITH ERROR RECOVERY
        AH = 12h
        BH = 85h
Note:   this function is identical to AH=12h/BH=05h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=05h
--------Q-1512--BH86-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 06h WITH ERROR RECOVERY
        AH = 12h
        BH = 86h
Note:   this function is identical to AH=12h/BH=06h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=06h
--------Q-1512--BH87-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 07h WITH ERROR RECOVERY
        AH = 12h
        BH = 87h
Note:   this function is identical to AH=12h/BH=07h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=07h
--------Q-1512--BH88-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 08h WITH ERROR RECOVERY
        AH = 12h
        BH = 88h
Note:   this function is identical to AH=12h/BH=08h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=08h
--------Q-1512--BH89-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 09h WITH ERROR RECOVERY
        AH = 12h
        BH = 89h
Note:   this function is identical to AH=12h/BH=09h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=09h
--------Q-1512--BH8A-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 0Ah WITH ERROR RECOVERY
        AH = 12h
        BH = 8Ah
Note:   this function is identical to AH=12h/BH=0Ah, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=0Ah
--------Q-1512--BH8B-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 0Bh WITH ERROR RECOVERY
        AH = 12h
        BH = 8Bh
Note:   this function is identical to AH=12h/BH=0Bh, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=0Bh
--------Q-1512--BH8C-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 0Ch WITH ERROR RECOVERY
        AH = 12h
        BH = 8Ch
Note:   this function is identical to AH=12h/BH=0Ch, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=0Ch
--------Q-1512--BH8D-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 0Dh WITH ERROR RECOVERY
        AH = 12h
        BH = 8Dh
Note:   this function is identical to AH=12h/BH=0Dh, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=0Dh
--------Q-1512--BH8E-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 0Eh WITH ERROR RECOVERY
        AH = 12h
        BH = 8Eh
Note:   this function is identical to AH=12h/BH=0Eh, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=0Eh
--------Q-1512--BH8F-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 0Fh WITH ERROR RECOVERY
        AH = 12h
        BH = 8Fh
Note:   this function is identical to AH=12h/BH=0Fh, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=0Fh
--------Q-1512--BH90-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 10h WITH ERROR RECOVERY
        AH = 12h
        BH = 90h
Note:   this function is identical to AH=12h/BH=10h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=10h
--------Q-1512--BH91-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 11h WITH ERROR RECOVERY
        AH = 12h
        BH = 91h
Note:   this function is identical to AH=12h/BH=11h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=11h,AH=12h/BX=1100h
--------Q-1512--BH92-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 12h WITH ERROR RECOVERY
        AH = 12h
        BH = 92h
Note:   this function is identical to AH=12h/BH=12h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=12h,AH=12h/BX=1200h
--------Q-1512--BH93-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 13h WITH ERROR RECOVERY
        AH = 12h
        BH = 93h
Note:   this function is identical to AH=12h/BH=13h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=13h
--------Q-1512--BH94-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 14h WITH ERROR RECOVERY
        AH = 12h
        BH = 94h
Note:   this function is identical to AH=12h/BH=14h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=14h
--------Q-1512--BH95-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 15h WITH ERROR RECOVERY
        AH = 12h
        BH = 95h
Note:   this function is identical to AH=12h/BH=15h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=15h
--------Q-1512--BH96-------------------------
INT 15 - DESQview v2.50+ - SEND MESSAGE 16h WITH ERROR RECOVERY
        AH = 12h
        BH = 96h
Note:   this function is identical to AH=12h/BH=16h, except that DESQview will
          not pop up a "Programming Error" window, instead returning an error
          code in AL (see #00455)
SeeAlso: AH=12h/BH=16h
--------T-1513-------------------------------
INT 15 - VMiX - "sys_wake" - WAKE SLEEPING PROCESS
        AH = 13h
        STACK:  WORD    process ID
Return: AX = status (SYS_OK or SYS_ERROR)
SeeAlso: AH=12h"VMiX"
--------T-1513-------------------------------
INT 15 - MultiDOS Plus - GET TASK CONTROL BLOCK
        AH = 13h
Return: BX:AX -> task control block (see #00456)
SeeAlso: AH=15h"MultiDOS"

Format of MultiDOS Plus v4.0 task control block:
Offset  Size    Description     (Table 00456)
 00h    DWORD   pointer to next TCB
 04h  8 BYTEs   ASCIZ task name
 0Ch  2 BYTEs   ???
 0Eh    WORD    task PSP segment
 10h    WORD    abort/suspend flags
 12h    WORD    current screen segment (see AH=0Bh,AH=0Ch)
 14h    WORD    priority level (0000h-FFFEh)
 16h    WORD    time slice counter
 18h  2 BYTEs   ???
 1Ah    WORD    suspend timer value
 1Ch    WORD    stack segment
 1Eh    WORD    stack pointer
 20h    WORD    display type
 22h    WORD    display memory
 24h  2 BYTEs   ???
 26h    WORD    termination count
 28h    WORD    equipment flag for BIO10 driver
 2Ah    BYTE    background CRT mode
 2Bh    WORD    screen width in columns
 2Dh    WORD    screen size in bytes
 2Fh    WORD    segment of physical screen memory
 31h 16 BYTEs   eight cursor positions
 41h    WORD    current cursor shape
 43h    BYTE    active display page
 44h    WORD    CRT controller I/O port base
 46h  2 BYTEs   ???
 48h    WORD    foreground task flag
 4Ah  6 BYTEs   ???
 50h    WORD    saved video segment (see AH=0Bh,AH=0Ch)
 52h    DWORD   old INT 22
 56h    DWORD   old INT 23
 5Ah    DWORD   old INT 24
 5Eh    WORD    top of memory for task
 60h  4 BYTEs   ???
 64h    WORD    DTA segment (see INT 21/AH=1Ah)
 66h    WORD    DTA offset
 68h  4 BYTEs   ???
 6Ch    BYTE    current ANSI.SYS attribute
 6Dh    BYTE    current ANSI.SYS column
 6Eh    BYTE    current ANSI.SYS row
 6Fh    BYTE    current ANSI.SYS display state
 70h    BYTE    maximum ANSI.SYS columns
 71h    BYTE    current ANSI.SYS page
 72h    WORD    saved ANSI.SYS cursor position
 74h    BYTE    ANSI.SYS parameter buffer index
 75h    BYTE    current ANSI.SYS screen mode
 76h    BYTE    ANSI.SYS wrap flag
 77h  6 BYTEs   ANSI.SYS parameter buffer
 7Dh    BYTE    ANSI.SYS keyboard DSR state
 7Eh  7 BYTEs   ANSI.SYS keyboard DSR buffer
 85h  3 BYTEs   ???
 88h 16 BYTEs   request header for DOS driver calls
 98h 14 BYTEs   ???
 A6h    WORD    segment of EMS map if EMS task
 A8h    WORD    flag: task makes EMS calls
 AAh    WORD    EMS handle for task
 ACh    WORD    keyboard shift state
 AEh 12 BYTEs   ???
 BAh    WORD    TCB of parent if child task
 BCh    WORD    termination code
 BEh    WORD    COM port number
 C0h  4 BYTEs   ???
 C4h    WORD    current IRQ number
 C6h  2 BYTEs   ???
 C8h    WORD    miscellaneous flag word
 CAh  2 BYTEs   ???
 CCh    DWORD   old INT 10
 D0h    WORD    EMS alternate map set number
 D2h 414 BYTEs  DOS current disk and directory context (optional)
--------T-1514-------------------------------
INT 15 - VMiX - "sys_clrwindow" - CLEAR WINDOW
        AH = 14h
        STACK:  WORD    top left corner of window (high byte = row, low = col)
                WORD    bottom right corner of window (high = row, low = col)
Return: AX = status (SYS_OK)
Note:   clears window to color set with "sys_setcolors" (AH=18h)
SeeAlso: AH=15h"VMiX",AH=16h"VMiX",AH=18h"VMiX",AH=1Fh"VMiX"
--------T-1514-------------------------------
INT 15 - MultiDOS Plus - CHECK IF MultiDOS FOREGROUND OR BACKGROUND
        AH = 14h
Return: AX = current state
            0000h MultiDOS Plus command prompt is background task
            0001h command prompt is foreground task
SeeAlso: AH=0Bh"MultiDOS"
--------T-1515-------------------------------
INT 15 - VMiX - "sys_setbwindow" - SET BANNER WINDOW MESSAGE
        AH = 15h
        STACK:  DWORD   pointer to ASCIZ banner message for top of screen
Return: AX = status (SYS_OK)
SeeAlso: AH=14h"VMiX",AH=16h"VMiX"
--------T-1515-------------------------------
INT 15 - MultiDOS Plus - GET SYSTEM BLOCK
        AH = 15h
Return: BX:AX -> system block (see #00457)
SeeAlso: AH=13h"MultiDOS"

Format of MultiDOS Plus 4.0 system block:
Offset  Size    Description     (Table 00457)
 00h    WORD    segment of system control block
 02h    WORD    redirection flag set by /NOREDIRECT
 04h    WORD    no-INT 10 flag set by /NO10
 06h    DWORD   old INT 10
 0Ah    DWORD   new INT 10
 0Eh    DWORD   pointer to WORD with current TCB offset (see #00456)
 12h    DWORD   pointer to WORD with idle task TCB offset
 16h    DWORD   pointer to WORD with foreground TCB offset (see #00456)
 1Ah    DWORD   pointer to WORD with MultiDOS TCB offset (see #00456)
 1Eh    WORD    Task Control Block size
 20h    WORD    number of TCBs
 22h    WORD    flag: EMS present
 24h    WORD    EMS page frame base segment
 26h    WORD    16K pages in EMS page frame
 28h    WORD    base segment for conventional memory tasks
 2Ah    WORD    conventional memory size in paragraphs
 2Ch    DWORD   pointer to list of queue pointers
--------T-1516-------------------------------
INT 15 - VMiX - "sys_setwindow" - SET ROOT WINDOW SIZE AND HOME CURSOR
        AH = 16h
        STACK:  DWORD   pointer to I/O Request Packet
                WORD    top left corner of window (high byte = row, low = col)
                WORD    bottom right corner of window (high = row, low = col)
Return: AX = status (SYS_OK or SYS_ERROR)
SeeAlso: AH=14h"VMiX",AH=17h"VMiX"
--------T-1516-------------------------------
INT 15 - MultiDOS Plus - INITIALIZATION
        AH = 16h
Note:   used internally during initialization; any other calls will cause
          unpredictable results
--------T-1517-------------------------------
INT 15 - VMiX - "sys_getcolors" - GET CONSOLE WINDOW COLORS
        AH = 17h
Return: AH = foreground color
        AL = background color
SeeAlso: AH=16h"VMiX",AH=18h"VMiX"
--------T-1517-------------------------------
INT 15 - MultiDOS Plus - MAP IRQ
        AH = 17h
        AL = IRQ to map (01h-0Fh)
        BX = offset of task control block (see #00456) to associate with IRQ
Return: AX = status
            0000h successful
            other invalid IRQ
Note:   the EMS map of the specified TCB is associated with the given interrupt
SeeAlso: AH=18h"MultiDOS",AH=19h"MultiDOS"
--------T-1518-------------------------------
INT 15 - VMiX - "sys_setcolors" - SET CONSOLE COLORS
        AH = 18h
        STACK:  WORD    new background/foreground colors
                        bits 3-0: foreground
                        bits 7-4: background
                        bits 15-8: unused
Return: AX = color
SeeAlso: AH=14h"VMiX",AH=17h"VMiX",AH=19h"VMiX"
--------T-1518-------------------------------
INT 15 - MultiDOS Plus - UNMAP IRQ
        AH = 18h
        AL = IRQ to unmap (01h-0Fh)
Return: AX = status
            0000h successful
            0001h invalid IRQ
Note:   results are unpredictable if the IRQ has not been mapped
SeeAlso: AH=17h"MultiDOS",AH=19h"MultiDOS"
--------T-1519-------------------------------
INT 15 - VMiX v2+ - "sys_setconwn" - SET WINDOW COLORS
        AH = 19h
        STACK:  WORD    new background/foreground colors
                        bits 3-0: foreground
                        bits 7-4: background
                        bits 15-8: unused
Return: AX = color
SeeAlso: AH=18h"VMiX"
--------T-1519-------------------------------
INT 15 - MultiDOS Plus - UNMAP ALL IRQs
        AH = 19h
Return: AX destroyed
Note:   for MultiDOS internal use only
SeeAlso: AH=17h"MultiDOS",AH=18h"MultiDOS"
--------T-151A-------------------------------
INT 15 - VMiX v2+ - "sys_sint" - INVOKE SOFTWARE INTERRUPT
        AH = 1Ah
        STACK:  WORD    interrupt number
                DWORD   pointer to register structure
Return: AX = returned flags
--------T-151A-------------------------------
INT 15 - MultiDOS Plus - MAP SEMAPHORE NAME TO NUMBER
        AH = 1Ah
        DS:SI -> 8-byte name
Return: AL = status
            00h successful
                AH = semaphore number (20h-3Fh)
            04h out of string space
Notes:  all eight bytes of the name are significant
        if the name does not already exist, it is added to the name table and
          associated with a free semaphore number
        names cannot be destroyed
SeeAlso: AH=1Bh"MultiDOS",AH=1Ch"MultiDOS",AH=1Dh"MultiDOS"
--------T-151B-------------------------------
INT 15 - VMiX v2+ - "sys_blkmov" - MOVE MEMORY BLOCK
        AH = 1Bh
        STACK:  DWORD   source address
                DWORD   destination address
                WORD    number of words to move
Return: nothing
--------T-151B-------------------------------
INT 15 - MultiDOS Plus - REQUEST RESOURCE SEMAPHORE BY NAME
        AH = 1Bh
        DS:SI -> 8-byte name
Return: AH = status
            00h successful
            02h invalid semaphore number
            03h caller already owns semaphore
            04h out of string space
Notes:  (see AH=01h"MultiDOS")
        equivalent to AH=1Ah followed by AH=01h
SeeAlso: AH=01h"MultiDOS",AH=1Ah"MultiDOS",AH=1Ch"MultiDOS",AH=1Dh"MultiDOS"
--------T-151C-------------------------------
INT 15 - VMiX v2+ - "sys_bitblt" - PUT GRAPHICAL OBJECT AT CURSOR POSITION
        AH = 1Ch
        STACK:  WORD    AND/OR pixel with background (00h = OR, 01h = AND)
                DWORD   pointer to object bitmap
                WORD    object width in pixels
                WORD    object height in pixels
Return: nothing
SeeAlso: AH=1Dh"VMiX"
--------T-151C-------------------------------
INT 15 - MultiDOS Plus - RELEASE RESOURCE SEMAPHORE BY NAME
        AH = 1Ch
        DS:SI -> 8-byte name
Return: AH = status
            00h successful
            01h not semaphore owner
            02h invalid semaphore number
            04h out of string space
Notes:  (see AH=02h"MultiDOS")
        equivalent to AH=1Ah followed by AH=02h
SeeAlso: AH=02h"MultiDOS",AH=1Ah"MultiDOS",AH=1Bh"MultiDOS",AH=1Dh"MultiDOS"
--------T-151D-------------------------------
INT 15 - VMiX v2+ - "sys_getfont" - GET CURRENT CONSOLE GRAPHICS FONT
        AH = 1Dh
Return: AX = current font number (00h-03h)
SeeAlso: AH=1Ch"VMiX",AH=1Eh"VMiX"
--------T-151D-------------------------------
INT 15 - MultiDOS Plus - TEST RESOURCE SEMAPHORE BY NAME
        AH = 1Dh
        DS:SI -> 8-byte name
Return: AH = status
            00h semaphore not in use
            01h semaphore owned by another task
            02h invalid semaphore number
            03h caller owns semaphore
            04h out of string space
Notes:  (see AH=10h"MultiDOS")
        equivalent to AH=1Ah followed by AH=10h
SeeAlso: AH=10h"MultiDOS",AH=1Ah"MultiDOS",AH=1Bh"MultiDOS",AH=1Ch"MultiDOS"
--------T-151E-------------------------------
INT 15 - VMiX v2+ - "sys_setfont" - SET CONSOLE GRAPHICS FONT
        AH = 1Eh
        STACK: WORD new font number (00h-03h)
Return: AX = current font number (00h-03h)
SeeAlso: AH=1Dh"VMiX"
--------T-151E00-----------------------------
INT 15 - MultiDOS Plus - CLEAR EVENT COUNTER
        AX = 1E00h
        DX = event/trigger number (00h-3Fh)
Return: AH = status
            00h successful
SeeAlso: AX=1E01h,AX=1E02h
--------T-151E01-----------------------------
INT 15 - MultiDOS Plus - TRIGGER EVENT
        AX = 1E01h
        DX = event/trigger number (00h-3Fh)
Return: AH = status
            00h successful
            01h invalid event/trigger number
Notes:  schedules any task waiting for event; if no task is waiting, the event
          counter is incremented (and will roll over if it was 65535)
        may be invoked by interrupt handler
SeeAlso: AX=1E00h,AX=1E02h
--------T-151E02-----------------------------
INT 15 - MultiDOS Plus - WAIT FOR EVENT
        AX = 1E02h
        DX = event/trigger number (00h-3Fh)
Return: AH = status
            00h successful
            01h invalid event/trigger number
Note:   if the event counter is zero, the task is suspended until the event is
          triggered with AX=1E01h; else, the counter is decremented and the
          call returns immediately
SeeAlso: AX=1E00h,AX=1E01h
--------T-151E08-----------------------------
INT 15 - MultiDOS Plus 4.01 - SET CONTEXT-SWITCH FUNCTIONS
        AX = 1E08h
        DX:BX -> context save handler (see #00458)
        DX:CX -> context restore handler (see #00458)
Return: nothing
Note:   handlers may be removed by setting addresses to 0000h:0000h

(Table 00458)
Values MultiDOS Plus context-switch handlers are called with:
        ES:BX -> task's TCB
Return: all registers preserved
--------T-151F-------------------------------
INT 15 - VMiX v2.???+ - "sys_scrollwin" - SCROLL WINDOW
        AH = 1Fh
        STACK:  WORD    top left corner of window (high byte = row, low = col)
                WORD    bottom right corner of window
Return: AX = status (SYS_OK)
SeeAlso: AH=14h"VMiX",AH=18h"VMiX"
--------T-151F-------------------------------
INT 15 - MultiDOS Plus v4.01 - GET MEMORY PARAMETERS
        AH = 1Fh
Return: BX = first segment of conventional memory
        DX = first segment of EMS swap frame into which MultiDOS will load
                programs
--------T-1520-------------------------------
INT 15 - MultiDOS Plus v4.01 - CHECK IF MULTITASKING ENABLED
        AH = 20h
Return: AX = current state
            0000h multitasking enabled
            other TCB of task that disabled multitasking
SeeAlso: AH=0Dh"MultiDOS",AH=13h"MultiDOS"
--------c-152000-----------------------------
INT 15 U - DOS 3.0+ PRINT.COM - DISABLE CRITICAL REGION FLAG
        AX = 2000h
Return: nothing
Desc:   stop setting user flag on entry to PRINT critical region
Note:   also supported by PC Network v1.00 RECEIVER.COM
SeeAlso: AX=2001h
--------c-152001-----------------------------
INT 15 U - DOS 3.0+ PRINT.COM - SET CRITICAL REGION FLAG
        AX = 2001h
        ES:BX -> byte which is to be incremented while in a DOS call
Return: nothing
Desc:   specify a user flag which PRINT should set to let an interested
          application know it is in a critical region
Note:   also supported by PC Network v1.00 RECEIVER.COM
SeeAlso: AX=2000h
--------O-152010-----------------------------
INT 15 - OS HOOK - SETUP SYSREQ ROUTINE (AT,XT286,PS50+)
        AX = 2010h
        ???
Return: ???
SeeAlso: AX=2011h
--------O-152011-----------------------------
INT 15 - OS HOOK - COMPLETION OF SYSREQ FUNCTION (AT,XT286,PS50+)
        AX = 2011h
        ???
Return: ???
SeeAlso: AX=2010h
--------B-1521-------------------------------
INT 15 - SYSTEM - POWER-ON SELF-TEST ERROR LOG (PS50+)
        AH = 21h
        AL = subfunction
            00h read POST log
            01h write POST log
                BH = device ID
                BL = error code
Return: CF clear if successful
        CF set on error
        AH = status
            00h OK
            01h list full
            02h unsupported subfunction
            80h invalid command
            86h unsupported function
        if function 00h:
           BX = number of error codes stored
           ES:DI -> error log
Notes:  the log is a series of words, the first byte of which identifies the
          error code and the second the device.
        supported by AMI PCI BIOS
        IBM considers this a required BIOS function
        if the device ID is FFh, the "error code" is the actual device number
          minus 255 (thus these devices have no specific error codes)
SeeAlso: AH=23h"SYSTEM",AH=24h"SYSTEM"
--------B-1522-------------------------------
INT 15 - SYSTEM - later PS/2s - LOCATE ROM BASIC
        AH = 22h
Return: CF set on error
            AH = status (86h if function not supported)
        CF clear on success
            AH = 00h
            ES:BX -> ROM BASIC
Notes:  if this function is not supported, ROM BASIC is at F600h:0000h
        IBM classifies this function as optional
SeeAlso: INT 86"BASIC",INT F0"BASIC"
--------B-152300-----------------------------
INT 15 u - IBM BIOS - SMART ENERGY SYSTEM - GET ??? CMOS DATA
        AX = 2300h
Return: CF clear if successful
            CL = value of CMOS location 2Dh
            CH = value of CMOS location 2Eh
        CF set on error
            AH = error code (80h,86h)
Note:   IBM classifies this function as optional
SeeAlso: AX=2301h,AX=2304h,AX=2305h
--------B-152301-----------------------------
INT 15 u - IBM BIOS - SMART ENERGY SYSTEM - SET ??? CMOS DATA
        AX = 2301h
        CL = new value for CMOS location 2Dh
        CH = new value for CMOS location 2Eh
Return: CF clear if successful
        CF set on error
            AH = error code (80h,86h)
Notes:  sets the contents of CMOS locations 2Dh and 2Eh
        IBM classifies this function as optional
SeeAlso: AX=2300h,AX=2304h,AX=2305h
--------B-152302-----------------------------
INT 15 u - IBM BIOS - SMART ENERGY SYSTEM - GET ROM STARTUP VIDEO REG TABLES
        AX = 2302h
        BL = data index (00h-0Dh) (see #00459)
Return: ES:BX -> table for register (see #00460,#00461)
        CX = size of table in bytes (may be 0000h)
Note:   IBM classifies this function as optional
SeeAlso: AX=2300h,AX=2301h,AX=2303h

(Table 00459)
Values for PS/1 ROM startup video register tables:
 00h    DAC registers
 01h    ???
 02h    Palette registers
 03h-0Dh ???

Format of PS/1 ROM startup DAC register table:
Offset  Size    Description     (Table 00460)
 00h    WORD    number of DAC registers in table
 02h    var     array of 3-byte DAC register values, starting at register 00h
SeeAlso: #00459

Format of PS/1 ROM startup Palette register table:
Offset  Size    Description     (Table 00461)
 00h 16 BYTEs   colors for palette registers 00h through 0Fh
 10h    BYTE    border color
SeeAlso: #00459,#00018
--------B-152303-----------------------------
INT 15 U - IBM BIOS - SMART ENERGY SYSTEM - ???
        AX = 2303h
        BX = ??? ('x')
        DX = 'y' and 'z'
                bits 15-7 = 'y'
                bits 6-3 unused
                bits 2-0 = 'z'
        DI = ??? (0352h)
Return: ???
Notes:  performs graphics functions, writes to segment A000h and VGA I/O ports
        IBM classifies this function as optional
--------B-152304-----------------------------
INT 15 u - IBM BIOS - SMART ENERGY SYSTEM - SYSTEM SETUP
        AX = 2304h
        DX = segment of 32K buffer
Return: CF clear if successful
            AX = 0003h (left over from setting video mode 3)
            BX,CX,DX,BP,DS,ES destroyed
        CF set on error
            AH = error code (80h,86h)
Desc:   run system setup utility, and optionally save any changed settings to
          CMOS RAM
Note:   IBM classifies this function as optional
SeeAlso: AX=2301h,AX=2305h
--------B-152305-----------------------------
INT 15 u - IBM BIOS - SMART ENERGY SYSTEM - GET PROCESSOR SPEED
        AX = 2305h
Return: CF clear if successful
            AL = processor speed in MHz
        CF set on error
            AL = FFh (speed unknown or >80 MHz)
            AL = error code (80h,86h = unsupported function)
Note:   IBM classifies this function as optional
SeeAlso: AX=2301h,AX=2304h,AH=BCh
--------b-152400-----------------------------
INT 15 - SYSTEM - later PS/2s - DISABLE A20 GATE
        AX = 2400h
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = status
                01h keyboard controller is in secure mode
                86h function not supported
Notes:  also supported by AMI PCI BIOS and Qualitas 386MAX v6.01+
        IBM classifies this function as optional
BUG:    AMI BIOS v1.00.03.AV0M never reports an error on failure to disable
          the A20 gate; it simply writes 0 to PORT 0092h
SeeAlso: AX=2401h,AX=2402h,AX=2403h,PORT 0092h
--------b-152401-----------------------------
INT 15 - SYSTEM - later PS/2s - ENABLE A20 GATE
        AX = 2401h
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = status
                01h keyboard controller is in secure mode
                86h function not supported
Notes:  also supported by AMI PCI BIOS and Qualitas 386MAX v6.01+
        IBM classifies this function as optional
SeeAlso: AX=2400h,AX=2402h,PORT 0092h
--------b-152402-----------------------------
INT 15 - SYSTEM - later PS/2s - GET A20 GATE STATUS
        AX = 2402h
Return: CF clear if successful
            AH = 00h
            AL = current state (00h disabled, 01h enabled)
            CX = ??? (set to 0000h-000Bh or FFFFh by AMI BIOS v1.00.03.AV0M)
                FFFFh if keyboard controller does not become ready within C000h
                         read attempts
        CF set on error
            AH = status
                01h keyboard controller is in secure mode
                86h function not supported
Notes:  also supported by AMI PCI BIOS and Qualitas 386MAX v6.01+
        IBM classifies this function as optional
SeeAlso: AX=2400h,AX=2401h
--------b-152403-----------------------------
INT 15 - SYSTEM - later PS/2s - QUERY A20 GATE SUPPORT
        AX = 2403h
Return: CF clear if successful
            AH = 00h
            BX = status of A20 gate support (see #00462)
        CF set on error
            AH = status
                01h keyboard controller is in secure mode
                86h function not supported
Notes:  also supported by AMI PCI BIOS and Qualitas 386MAX v6.01+
        IBM classifies this function as optional
BUG:    at one point early in processing INT 15/AH=24h, the AMI PCI BIOS
          version 1.00.05.AX1 compares whether AL==03h instead of AL>=03h,
          thus causing a random branch on any value of AL greater than 3.
SeeAlso: AX=2402h

Bitfields for A20 gate support status:
Bit(s)  Description     (Table 00462)
 0      supported on keyboard controller
 1      supported with bit 1 of I/O port 92h
 14-2   reserved
 15     additional data is available (location not yet defined)
--------T-153000-----------------------------
INT 15 - Object Kernel for DOS - INSTALLATION CHECK
        AX = 3000h
Return: AX:BX = 4F42h:4A21h ('OBJ!') if installed
            CX = resident segment
Program: the Object Kernel is a program by M.W. Pieters which is currently
          under development
Note:   Central Point's CPBACKUP v9 calls INT 15/AX=3000h at startup, but it
          may be checking for a different program's presence
SeeAlso: AX=3001h,AX=3008h
--------T-153001-----------------------------
INT 15 - Object Kernel for DOS - GET STATUS BLOCK
        AX = 3001h
Return: AX = FFFFh
        ES:DI -> status block
SeeAlso: AX=3000h,AX=3008h
--------T-153002-----------------------------
INT 15 - Object Kernel for DOS - KILL PROCESS
        AX = 3002h
        (not yet implemented)
SeeAlso: AX=3000h
--------T-153003-----------------------------
INT 15 - Object Kernel for DOS - STOP PROCESS
        AX = 3003h
        (not yet implemented)
SeeAlso: AX=3000h
--------T-153004-----------------------------
INT 15 - Object Kernel for DOS - START PROCESS
        AX = 3004h
        (not yet implemented)
SeeAlso: AX=3000h
--------T-153005-----------------------------
INT 15 - Object Kernel for DOS - RESTART PROCESS
        AX = 3005h
        (not yet implemented)
SeeAlso: AX=3000h
--------T-153006-----------------------------
INT 15 - Object Kernel for DOS - EXECUTE PROCESS
        AX = 3006h
        (not yet implemented)
SeeAlso: AX=3000h
--------T-153007-----------------------------
INT 15 - Object Kernel for DOS - LIST PROCESSES
        AX = 3007h
        (not yet implemented)
SeeAlso: AX=3000h
--------T-153008-----------------------------
INT 15 - Object Kernel for DOS - SWITCH ObjectKernel ON/OFF
        AX = 3008h
        BH = new state (00h disabled, 01h enabled)
Return: AX = FFFFh
SeeAlso: AX=3000h,AX=3009h
--------T-153009-----------------------------
INT 15 - Object Kernel for DOS - RESERVED FOR FUTURE USE
        AX = 3009h to 30FFh
SeeAlso: AX=3000h
Program: the Object Kernel is a program by M.W. Pieters which is currently
          under development
----------153D-------------------------------
INT 15 - IBM SurePath BIOS - Officially "Private" Function
        AH = 3Dh
SeeAlso: AH=07h"IBM",AH=3Eh"IBM"
----------153E-------------------------------
INT 15 - IBM SurePath BIOS - Officially "Private" Function
        AH = 3Eh
SeeAlso: AH=3Dh"IBM",AH=3Fh"IBM"
----------153F-------------------------------
INT 15 - IBM SurePath BIOS - Officially "Private" Function
        AH = 3Fh
SeeAlso: AH=07h"IBM",AH=3Eh"IBM"
--------B-1540-------------------------------
INT 15 - SYSTEM - READ/MODIFY PROFILES (CONVERTIBLE)
        AH = 40h
        AL = subfunction
            00h get system profile in CX and BX
            01h set system profile from CX and BX
            02h get internal modem profile in BX
            03h set internal modem profile from BX
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = status (80h = profile execution failed)
--------V-154000-----------------------------
INT 15 - Compaq SLT/286 or Portable 386 - READ LCD/PLASMA TIMEOUT
        AX = 4000h
Return: AX = 4000h
        CL = timeout in minutes, 00h if disabled
SeeAlso: AX=4001h,AX=4600h
--------V-154001-----------------------------
INT 15 - Compaq SLT/286 or Portable 386 - SET LCD/PLASMA TIMEOUT
        AX = 4001h
        CL = timeout in minutes, 00h to disable
Return: AL = status
            00h timeout modified
            01h timeout cannot be modified
            40h timeout cannot be modified
        CL = timeout in minutes, 00h if disabled
SeeAlso: AX=4000h,AX=4601h
--------B-1541-------------------------------
INT 15 - SYSTEM - WAIT ON EXTERNAL EVENT (CONVERTIBLE and some others)
        AH = 41h
        AL = condition type (see #00463)
        BH = condition compare or mask value
        BL = timeout value times 55 milliseconds
            00h means no timeout
        DX = I/O port address if AL bit 4 set
        ES:DI -> user byte if AL bit 4 clear
Return: after event or timeout occurs
Note:   call AH=C0h and examine bit 3 of feature byte 1 to determine whether
          this function is supported
SeeAlso: AH=83h,AH=86h,AH=C0h

Bitfields for external event wait condition type:
Bit(s)  Description     (Table 00463)
 0-2    condition to wait for
        0 any external event
        1 compare and return if equal
        2 compare and return if not equal
        3 test and return if not zero
        4 test and return if zero
 3      reserved
 4      1=port address, 0=user byte
 5-7    reserved
--------B-1542-------------------------------
INT 15 - SYSTEM - REQUEST POWER OFF (CONVERTIBLE,HP 95LX)
        AH = 42h
        AL = suspend type
            00h to use system profile
            01h to force suspend regardless of system profile
Return: nothing
Note:   the HP 95LX apparently suspends regardless of the value in AL; on
          power-up, execution will resume following the instruction calling
          this function
SeeAlso: AH=44h
--------b-154280-----------------------------
INT 15 - Compaq SLT/286 - ENTER STANDBY
        AX = 4280h
Return: AH = 42h
        CF clear if successful
        CF set if unable to enter standby
SeeAlso: AX=4600h,AX=5307h/CX=0001h"STAND-BY"
--------B-1543-------------------------------
INT 15 - SYSTEM - READ SYSTEM STATUS (CONVERTIBLE)
        AH = 43h
Return: AL = status bits (see #00464)

Bitfields for Convertible system status:
Bit(s)  Description     (Table 00464)
 7      power low
 6      external power in use
 5      standby power lost
 4      power activated by alarm
 3      internal modem powered on
 2      RS232/parallel adapter powered on
 1      reserved
 0      LCD detached
--------B-1544-------------------------------
INT 15 - SYSTEM - (DE)ACTIVATE INTERNAL MODEM POWER (CONVERTIBLE)
        AH = 44h
        AL = new modem power state (00h power off, 01h power on)
Return: nothing
SeeAlso: AH=42h
--------b-1544C0-----------------------------
INT 15 - Olivetti Quaderno - INITIALIZE DIGITAL SIGNAL PROCESSING???
        AX = 44C0h
        ES:DI -> new DSP procedure (exchanged with CMOS[28h])
        ES:SI -> ??? buffer
Return: ES:DI -> old DSP procedure
        ES:SI buffer filled with ten bytes from CMOS (addresses 14h-1Ch)
          followed by 00h (addresses 15h-1Ch copied only if less than 21h)
Note:   this function is also supported by XBIOS.COM
SeeAlso: AX=44C9h
--------b-1544C1-----------------------------
INT 15 - Olivetti Quaderno - ???
        AX = 44C1h
        ???
Return: ???
Note:   this function is also supported by XBIOS.COM
SeeAlso: AX=44C9h
--------b-1544C2-----------------------------
INT 15 - Olivetti Quaderno - ???
        AX = 44C2h
        DL = byte to be written to I/O port 350h
Note:   this function is also supported by XBIOS.COM
SeeAlso: AX=44C3h,AX=44C9h
--------b-1544C3-----------------------------
INT 15 - Olivetti Quaderno - GET ???
        AX = 44C3h
Return: DH = bitfields (see #00465)
        DL = value read from I/O port 350h
Note:   this function is also supported by XBIOS.COM
SeeAlso: AX=44C2h,AX=44C9h

Bitfields for Olivetti Quaderno ???:
Bit(s)  Description     (Table 00465)
 5-7    5-7 read from I/O port 351h
 2-4    zero
 1-0    "tres complique"
--------b-1544C4-----------------------------
INT 15 - Olivetti Quaderno - ???
        AX = 44C4h and 44C5h
        ???
Return: ???
Note:   this function is also supported by XBIOS.COM
SeeAlso: AX=44C9h
--------b-1544C6-----------------------------
INT 15 - Olivetti Quaderno - READ LCD
        AX = 44C6h
Return: DX = FFFFh clock is displayed on LCD display
        DX = other: hex number displayed in first four positions of display
        BH = left alphanumeric character on display (see #00466)
        BL = right alphanumeric character on display (see #00466)
        CL = colon flags (see #00467)
Notes:  the LCD display has the format HH:HH:AA, where H is a hex digit and A
          is an alphanumeric character
        this function is also supported by XBIOS.COM
SeeAlso: AX=44C7h,AX=44C9h

(Table 00466)
Values for Olivetti Quaderno LCD alphanumeric characters:
 00h-0Fh hex digit
 2Bh    "+"
 2Dh    "-"
 30h-39h "0" to "9"
 41h-5Ah "A" to "Z"
 61h-6Ah "a" to "z"
 else   blank

Bitfields for Olivetti Quaderno LCD colon flags:
Bit(s)  Description     (Table 00467)
 0      left colon on
 1      right colon on
 2-7    unused
--------b-1544C7-----------------------------
INT 15 - Olivetti Quaderno - WRITE LCD
        AX = 44C7h
        DX = hex display
            FFFFh display clock and "HI", "Md", or "Lo"
                BH,BL,CL unused
            other: display specified hex number in first four positions
                BH = left alphanumeric character on display (see #00466)
                BL = right alphanumeric character on display (see #00466)
                CL = colon flags (see #00467)
Return: nothing
Note:   this function is also supported by XBIOS.COM
SeeAlso: AX=44C6h
--------b-1544C8-----------------------------
INT 15 - Olivetti Quaderno - ???
        AX = 44C8h
        CL = ??? (00h,02h,21h)
        CH = ???
        ???
Return: ???
Note:   this function is also supported by XBIOS.COM
SeeAlso: AX=44C9h
--------b-1544C9-----------------------------
INT 15 - Olivetti Quaderno - GET XBIOS VERSION
        AX = 44C9h
Return: AL = major version
        AH = minor version
Note:   this function is also supported by XBIOS.COM
--------B-1544F1-----------------------------
INT 15 U - Toshiba laptops - SECURITY LEVEL CHECK
        AX = 44F1h
        DS:DX -> byte with 00h ???
Return: ???
Note:   used by Toshiba BIOS setup utility TSETUP.EXE to distinguish
          between USER and SUPERVISOR security level
SeeAlso: AX=44F2h,AX=44F3h
--------B-1544F2BX0604-----------------------
INT 15 U - Toshiba laptops - SECURITY LEVEL CHECK
        AX = 44F2h
        BX = 0604h ???
Return: CF = ???
        AH = ???
        DX = ???
Note:   used by Toshiba BIOS setup utility TSETUP.EXE to distinguish
          between USER and SUPERVISOR security level
SeeAlso: AX=44F1h,AX=44F3h
--------B-1544F3-----------------------------
INT 15 U - Toshiba laptops - SECURITY LEVEL CHECK
        AX = 44F3h
        DS:DX -> byte with 00h or 01h ???
Return: DS:DX -> changed ???
Note:   used by Toshiba BIOS setup utility TSETUP.EXE to distinguish
          between USER and SUPERVISOR security level
SeeAlso: AX=44F1h,AX=44F2h
--------b-1545-------------------------------
INT 15 U - HP 100LX/200LX - SET DISPLAY CONTROL STATUS
        AH = 45h
        AL = new display control status
            bit 0: DISPCTL flag +C instead of -C
            bit 1: DISPCTL flag +K instead of -K
SeeAlso: AH=46h"HP",AH=47h"HP"
--------b-1546-------------------------------
INT 15 U - HP 100LX/200LX - SET POWER OFF TIMEOUT
        AH = 46h
        BX = timeout value in ticks
            0000h inhibit auto power off
Note:   the 200LX default timeout is 0CCDh = 3277 ticks = approx. 3 min.
SeeAlso: AH=45h"HP",AH=47h"HP"
--------b-154600-----------------------------
INT 15 - Compaq SLT/286 - READ POWER CONSERVATION/MODEM CONFIGURATION
        AX = 4600h
Return: AH = modem configuration information (see #00468)
        AL = power conservation status information (see #00469)
        BH = default system inactivity timeout (1-21 minutes)
        BL = current system inactivity timeout (1-21 minutes)
        CH = default video display inactivity timeout (1-63 minutes)
        CL = current video display inactivity timeout (1-63 minutes)
        DH = default fixed disk drive inactivity timeout (1-21 minutes)
        DL = current fixed disk drive inactivity timeout (1-21 minutes)
SeeAlso: AX=4280h,AX=4601h,INT 77

Bitfields for Compaq SLT/286 modem configuration information:
Bit(s)  Description     (Table 00468)
 0      powerup state (0 off, 1 on)
 1      modem installed
 2      IRQ line assignment (0 IRQ 4, 1 IRQ 3)
 3      COM port assignment (0 = COM 2, 1 = COM 1)
 4      modem state (0 not assigned, 1 assigned)
 5      modem is on

Bitfields for Compaq SLT/286 power conservation status:
Bit(s)  Description     (Table 00469)
 0      power source (0 internal, 1 external)
 1-2    low battery state
        00 no low battery condition
        01 low battery 1
        10 reserved
        11 low battery 2
 3-4    power conservation mode
        00 automatic, 01 on, 10 off, 11 reserved
--------b-154601-----------------------------
INT 15 - Compaq SLT/286 - MODIFY POWER CONSERVATION/MODEM CONFIGURATION
        AX = 4601h
        BL = system inactivity timeout (1-21 minutes)
            FFh do not change
        CL = video display inactivity timeout (1-63 minutes)
            FFh do not change
        DL = current fixed disk drive inactivity timeout (1-21 minutes)
            FFh do not change
        DH = new modem state (00h turn off, 01h turn on, FFh don't change)
Return: CF clear if successful
            AH = 00h
            BL = current system inactivity timeout (1-21 minutes)
            CL = current video display inactivity timeout (1-63 minutes)
            DL = current fixed disk drive inactivity timeout (1-21 minutes)
            DH = modem state (FFh unchanged, 00h turned off, 01h turned on)
        CF set on error
            AH = error code
                01h input is out of range
                02h no modem present
SeeAlso: AX=4600h,INT 77
--------b-154604-----------------------------
INT 15 - Compaq Contura 486 and "Alladin" 08/05/93 ROMs - GET ???
        AX = 4604h
Return: CF clear if successful
            AL = byte read from I/O port 03F8h
        CF set on error (not supported)
            AH = 86h (unsupported function)
Note:   also supported by 7/26/93 LTE Lite 386 ROM
--------b-154605-----------------------------
INT 15 - Compaq Contura 486 and "Alladin" 08/05/93 ROMs - ???
        AX = 4605h
Return: CF clear if successful
        CF set on error (not supported)
            AH = 86h (unsupported function)
Note:   this function is a NOP (other than clearing CF) in the 08/05/93 version
          of the Contura 486/486c/486cx and "Aladdin" ROM, and the 7/26/93
          LTE Lite 386 ROM
--------b-1547-------------------------------
INT 15 U - HP 100LX/200LX - GET/SET DISPLAY CONTRAST
        AH = 47h
        AL = subfunction
           00h set contrast
                BL = new contrast
                    (00h-0Fh, 0Fh is darkest, 10h-FFh are same as 0Fh)
           other get current contrast
Return: AL = contrast (00h-0Fh, 0Fh is darkest)
Note:   may be for backward compatibility with HP95LX, as INT 15/AH=62h does
          substantially the same thing as this function
SeeAlso: AH=45h"HP",AH=48h"HP",AH=62h"HP"
--------b-1548-------------------------------
INT 15 U - HP 100LX/200LX - SET BUZZER VOLUME
        AH = 48h
        AL = volume (00h-03h; 03h is loudest, 04h-FFh are same as 03h)
SeeAlso: AH=47h"HP"
--------S-1549-------------------------------
INT 15 U - HP 100LX/200LX - SERIAL INTERFACE SELECT
        AH = 49h
        AL = serial interface
            00h wired (COM1)
            01h infrared
Note:   interface should only be changed in deactivated state (see AH=4Ah)
SeeAlso: AH=4Ah"HP"
--------J-154900-----------------------------
INT 15 - Far East MS-DOS - GET BIOS TYPE
        AX = 4900h
Return: CF clear if successful
            AH = 00h
            BL = BIOS mode
                00h DOS/V
                01h standard DBCS DOS (hardware DBCS support)
        CF set on error
            AH = 86h (function not supported)
Note:   in practice, DOS/J returns AH=86h; AX DOS does not support this call
SeeAlso: AH=50h,INT 21/AH=30h
--------S-154A-------------------------------
INT 15 U - HP 100LX/200LX - SERIAL INTERFACE CONTROL
        AH = 4Ah
        AL = control
            00h deactivate
            01h activate
Note:   interface selected with AH=49h will be (de)activated
SeeAlso: AH=49h"HP",AH=4Bh"HP"
--------b-154B-------------------------------
INT 15 U - HP 100LX/200LX - ADJUST SYSTEM TIME
        AH = 4Bh
Desc:   adjust system time based on real-time clock
SeeAlso: AH=4Ah"HP",INT 1A/AH=02h,INT 21/AH=2Ch
--------b-154DD4-----------------------------
INT 15 - HP 95LX/100LX/200LX - INSTALLATION CHECK
        AX = 4DD4h
Return: BX = 4850h ("HP") if HP 95LX/100LX/200LX
            CX = model
                0101h HP 95LX
                0102h HP 100LX/200LX
            DH = ???
                02h HP 200LX 2MB BIOS 1.01 A D german
            DL = ???
                00h HP 95LX
                01h HP 200LX 2MB BIOS 1.01 A D german
SeeAlso: INT 0B"HP 95LX",INT 0F"HP 95LX",INT 5F/AH=00h,INT 60/DI=0100h
SeeAlso: INT 61"HP 95LX"
--------b-154E-------------------------------
INT 15 - HP 95LX - ENABLE/DISABLE LIGHT SLEEP
        AH = 4Eh
        AL = light sleep
            00h disabled
            01h enabled
Note:   when light sleep is disabled, the system will continue running at full
          speed; when enabled, it may automatically slow to conserve batteries
SeeAlso: INT 06"HP 95LX",INT 60/DI=0100h
----------154E-------------------------------
INT 15 - IBM SurePath BIOS - Officially "Private" Function
        AH = 4Eh
SeeAlso: AH=07h"IBM",AH=3Eh"IBM"
--------B-154F-------------------------------
INT 15 C - KEYBOARD - KEYBOARD INTERCEPT (AT model 3x9,XT2,XT286,CONV,PS)
        AH = 4Fh
        AL = hardware scan code (see #00006)
        CF set
Return: CF set to continue processing scan code
           AL = possibly-altered hardware scan code (see #00006)
        CF clear
           scan code should be ignored
Notes:  called by INT 09 handler to translate scan codes; the INT 09 code does
          not examine the scan code it reads from the keyboard until after
          this function returns.  This permits software to rearrange the
          keyboard; for example, swapping the CapsLock and Control keys, or
          turning the right Shift key into Enter.
        DOS 6 KEYB.COM will not pass through this function if Ctrl-Alt-Del is
          pressed and a SmartDrive v4-compatible cache is installed which has
          dirty cache buffers; some other disk caches such as HyperDisk
          operate similarly in order to prevent loss of cached data which has
          not yet been written to disk
        IBM classifies this function as required
SeeAlso: INT 09,INT 15/AH=C0h
--------J-1550-------------------------------
INT 15 - DOS/V - FONT SUBSYSTEM ACCESS
        AH = 50h
        AL = which function address to retrieve
            00h "read font" function
            01h "write font" function
        BL = 00h
        BH = character size (00h single-byte, 01h double-byte)
        DH = width of character cell
        DL = height of character cell
        BP = code page (see #00470)
Return: CF clear if successful
            AH = 00h
            ES:BX -> requested function's address
        CF set on error
            AH = error code (see #00471)
SeeAlso: AH=49h

(Table 00470)
Values for DOS/V code page:
 0      default
 437    US English
 932    Japanese
 934    Korea
 936    China
 938    Taiwan
SeeAlso: #01757

(Table 00471)
Values for DOS/V error code:
 01h    invalid font type in BH
 02h    BL not zero
 03h    invalid font size
 04h    invalid code page
 80h    unsupported function (PC)
 86h    unsupported function (XT)
SeeAlso: #01680
--------T-1550-------------------------------
INT 15 - VMIX v2.???+ - "sys_vm_page" - SET NEW VIRTUAL PAGE TABLE
        AH = 50h
        BX = segment of page directory table
        CX = page number of page table
SeeAlso: AH=10h"VMiX",AH=51h"VMiX",AH=52h"VMiX"
--------T-1551-------------------------------
INT 15 - VMiX v2.???+ - "sys_vm_func" - EXECUTE FUNCTION IN PROTECTED MODE
        AH = 51h
        STACK:  DWORD   selector:offset of function
Return: registers as returned by function
Note:   executes function with privilege level 0 (highest privilege)
SeeAlso: AH=10h"VMiX",AH=52h"VMiX"
--------B-155101-----------------------------
INT 15 - SYSTEM - later PS/2s - EXPANSION UNIT, RETURN CONFIGURATION NUMBER
        AX = 5101h
Return: CF set if successful
            AH = 00h
            AL = current configuration number
                00h system unit only
                FFh configuration not recognized
            BX = status flag
                bits 0-14: reserved
                bit 15: additional data is available (location TBD)
        CF clear on error
            AH = status
                01h expansion unit is not present
                86h function not supported
Note:   CF convention is the reverse of the standard convention for this
          interrupt.  (Perhaps a typo in the IBM BIOS Tech Ref?)
--------T-1552-------------------------------
INT 15 - VMiX v2.???+ - "sys_vm_init" - INITIALIZE PROTECTED-MODE ENVIRONMENT
        AH = 52h
SeeAlso: AH=50h"VMiX",AH=51h"VMiX"
--------d-1552-------------------------------
INT 15 C - IBM/MS INT 13 Extensions - MEDIA EJECT INTERCEPT
        AH = 52h
        DL = drive number
Return: CF clear if OK to eject media
            AH = 00h
        CF set if ejection disallowed
            AH = error code (B1h,B3h) (see #00234)
Note:   called by the IBM/MS INT 13 Extensions driver/BIOS when an ejection
          request is made
SeeAlso: INT 13/AH=46h"INT 13 Extensions"
--------p-155300-----------------------------
INT 15 - Advanced Power Management v1.0+ - INSTALLATION CHECK
        AX = 5300h
        BX = device ID of system BIOS (0000h)
Return: CF clear if successful
            AH = major version (BCD)
            AL = minor version (BCD)
            BX = 504Dh ("PM")
            CX = flags (see #00472)
        CF set on error
            AH = error code (06h,09h,86h) (see #00473)
BUG:    early versions of the Award Modular BIOS with built-in APM support
          reportedly do not set BX on return

Bitfields for APM flags:
Bit(s)  Description     (Table 00472)
 0      16-bit protected mode interface supported
 1      32-bit protected mode interface supported
 2      CPU idle call reduces processor speed
 3      BIOS power management disabled
 4      BIOS power management disengaged (APM v1.1)
 5-7    reserved

(Table 00473)
Values for APM error code:
 01h    power management functionality disabled
 02h    interface connection already in effect
 03h    interface not connected
 04h    real-mode interface not connected
 05h    16-bit protected-mode interface already connected
 06h    16-bit protected-mode interface not supported
 07h    32-bit protected-mode interface already connected
 08h    32-bit protected-mode interface not supported
 09h    unrecognized device ID
 0Ah    invalid parameter value in CX
 0Bh    (APM v1.1) interface not engaged
 0Ch    (APM v1.2) function not supported
 0Dh    (APM v1.2) Resume Timer disabled
 0Eh-1Fh reserved for other interface and general errors
 20h-3Fh reserved for CPU errors
 40h-5Fh reserved for device errors
 60h    can't enter requested state
 61h-7Fh reserved for other system errors
 80h    no power management events pending
 81h-85h reserved for other power management event errors
 86h    APM not present
 87h-9Fh reserved for other power management event errors
 A0h-FEh reserved
 FFh    undefined
--------p-155301-----------------------------
INT 15 - Advanced Power Management v1.0+ - CONNECT REAL-MODE INTERFACE
        AX = 5301h
        BX = device ID of system BIOS (0000h)
Return: CF clear if successful
        CF set on error
            AH = error code (02h,05h,07h,09h) (see #00473)
Note:   on connection, an APM v1.1 or v1.2 BIOS switches to APM v1.0
          compatibility mode until it is informed that the user supports a
          newer version of APM (see AX=530Eh)
SeeAlso: AX=5302h,AX=5303h,AX=5304h
--------p-155302-----------------------------
INT 15 R - Advanced Power Management v1.0+ - CONNECT 16-BIT PROTMODE INTERFACE
        AX = 5302h
        BX = device ID of system BIOS (0000h)
Return: CF clear if successful
            AX = real-mode segment base address of protected-mode 16-bit code
                segment
            BX = offset of entry point
            CX = real-mode segment base address of protected-mode 16-bit data
                segment
            ---APM v1.1---
            SI = APM BIOS code segment length
            DI = APM BIOS data segment length
        CF set on error
            AH = error code (02h,05h,06h,07h,09h) (see #00473)
Notes:  the caller must initialize two consecutive descriptors with the
          returned segment base addresses; these descriptors must be valid
          whenever the protected-mode interface is called, and will have
          their limits arbitrarily set to 64K.
        the protected mode interface is invoked by making a far call with the
          same register values as for INT 15; it must be invoked while CPL=0,
          the code segment descriptor must have a DPL of 0, the stack must be
          in a 16-bit segment and have enough room for BIOS use and possible
          interrupts, and the current I/O permission bit map must allow access
          to the I/O ports used for power management.
        functions 00h-03h are not available from protected mode
        on connection, an APM v1.1 or v1.2 BIOS switches to APM v1.0
          compatibility mode until it is informed that the user supports a
          newer version of APM (see AX=530Eh)
SeeAlso: AX=5301h,AX=5303h,AX=5304h
--------p-155303-----------------------------
INT 15 - Advanced Power Management v1.0+ - CONNECT 32-BIT PROTMODE INTERFACE
        AX = 5303h
        BX = device ID of system BIOS (0000h)
Return: CF clear if successful
            AX = real-mode segment base address of protected-mode 32-bit code
                segment
            EBX = offset of entry point
            CX = real-mode segment base address of protected-mode 16-bit code
                segment
            DX = real-mode segment base address of protected-mode 16-bit data
                segment
            ---APM v1.1---
            SI = APM BIOS code segment length
            DI = APM BIOS data segment length
        CF set on error
            AH = error code (02h,05h,07h,08h,09h) (see #00473)
Notes:  the caller must initialize three consecutive descriptors with the
          returned segment base addresses for 32-bit code, 16-bit code, and
          16-bit data, respectively; these descriptors must be valid whenever
          the protected-mode interface is called, and will have their limits
          arbitrarily set to 64K.
        the protected mode interface is invoked by making a far call to the
          32-bit code segment with the same register values as for INT 15; it
          must be invoked while CPL=0, the code segment descriptor must have a
          DPL of 0, the stack must be in a 32-bit segment and have enough room
          for BIOS use and possible interrupts, and the current I/O permission
          bit map must allow access to the I/O ports used for power management.
        functions 00h-03h are not available from protected mode
        on connection, an APM v1.1 or v1.2 BIOS switches to APM v1.0
          compatibility mode until it is informed that the user supports a
          newer version of APM (see AX=530Eh)
SeeAlso: AX=5301h,AX=5302h,AX=5304h
--------p-155304-----------------------------
INT 15 - Advanced Power Management v1.0+ - DISCONNECT INTERFACE
        AX = 5304h
        BX = device ID of system BIOS (0000h)
Return: CF clear if successful
        CF set on error
            AH = error code (03h,09h) (see #00473)
SeeAlso: AX=5301h,AX=5302h,AX=5303h
--------p-155305-----------------------------
INT 15 - Advanced Power Management v1.0+ - CPU IDLE
        AX = 5305h
Return: CF clear if successful (after system leaves idle state)
        CF set on error
            AH = error code (03h,0Bh) (see #00473)
Notes:  call when the system is idle and should be suspended until the next
          system event or interrupt
        should not be called from within a hardware interrupt handler to avoid
          reentrance problems
        if an interrupt causes the system to resume normal processing, the
          interrupt may or may not have been handled when the BIOS returns
          from this call; thus, the caller should allow interrupts on return
        interrupt handlers may not retain control if the BIOS allows
          interrupts while in idle mode even if they are able to determine
          that they were called from idle mode
        the caller should issue this call continuously in a loop until it needs
          to perform some processing of its own
SeeAlso: AX=1000h,AX=5306h,INT 2F/AX=1680h
--------p-155306-----------------------------
INT 15 - Advanced Power Management v1.0+ - CPU BUSY
        AX = 5306h
Return: CF clear if successful
        CF set on error
            AH = error code (03h,0Bh) (see #00473)
Notes:  called to ensure that the system runs at full speed even on systems
          where the BIOS is unable to recognize increased activity (especially
          if interrupts are hooked by other programs and not chained to the
          BIOS)
        this call may be made even when the system is already running at full
          speed, but it will create unnecessary overhead
        should not be called from within a hardware interrupt handler to avoid
          reentrance problems
SeeAlso: AX=5305h
--------p-155307-----------------------------
INT 15 - Advanced Power Management v1.0+ - SET POWER STATE
        AX = 5307h
        BX = device ID (see #00474)
        CX = system state ID (see #00475)
Return: CF clear if successful
        CF set on error
            AH = error code (01h,03h,09h,0Ah,0Bh,60h) (see #00473)
Note:   should not be called from within a hardware interrupt handler to avoid
          reentrance problems
SeeAlso: AX=530Ch

(Table 00474)
Values for APM device IDs:
 0000h  system BIOS
 0001h  all devices for which the system BIOS manages power
 01xxh  display (01FFh for all attached display devices)
 02xxh  secondary storage (02FFh for all attached secondary storage devices)
 03xxh  parallel ports (03FFh for all attached parallel ports)
 04xxh  serial ports (04FFh for all attached serial ports)
---APM v1.1+ ---
 05xxh  network adapters (05FFh for all attached network adapters)
 06xxh  PCMCIA sockets (06FFh for all)
 0700h-7FFFh reserved
 80xxh  system battery devices (APM v1.2)
 8100h-DFFFh reserved
 Exxxh  OEM-defined power device IDs
 F000h-FFFFh reserved

(Table 00475)
Values for system state ID:
 0000h  ready (not supported for device ID 0001h)
 0001h  stand-by
 0002h  suspend
 0003h  off (not supported for device ID 0001h in APM v1.0)
---APM v1.1---
 0004h  last request processing notification (only for device ID 0001h)
 0005h  last request rejected (only for device ID 0001h)
 0006h-001Fh reserved system states
 0020h-003Fh OEM-defined system states
 0040h-007Fh OEM-defined device states
 0080h-FFFFh reserved device states
--------p-155307CX0001-----------------------
INT 15 - Advanced Power Management v1.0+ - SYSTEM STAND-BY
        AX = 5307h
        CX = 0001h
        BX = 0001h (device ID for all power-managed devices)
Return: CF clear
Notes:  puts the entire system into stand-by mode; normally called in response
          to a System Stand-by Request notification after any necessary
          processing, but may also be invoked at the caller's discretion
        should not be called from within a hardware interrupt handler to avoid
          reentrance problems
        the stand-by state is typically exited on an interrupt
SeeAlso: AX=4280h,AX=5307h/CX=0002h"SUSPEND",AX=5307h/CX=0003h,AX=530Bh
--------p-155307CX0002-----------------------
INT 15 - Advanced Power Management v1.0+ - SUSPEND SYSTEM
        AX = 5307h
        CX = 0002h
        BX = 0001h (device ID for all power-managed devices)
Return: after system is resumed
        CF clear
Notes:  puts the entire system into a low-power suspended state; normally
          called in response to a Suspend System Request notification after
          any necessary processing, but may also be invoked at the caller's
          discretion
        should not be called from within a hardware interrupt handler to avoid
          reentrance problems
        the caller may need to update its date and time values because the
          system could have been suspended for a long period of time
SeeAlso: AX=5307h/CX=0001h"STAND-BY",AX=530Bh
--------p-155307CX0003-----------------------
INT 15 - Advanced Power Management v1.2 - TURN OFF SYSTEM
        AX = 5307h
        CX = 0003h
        BX = 0001h (device ID for all power-managed devices)
Return: after system is resumed
        CF clear
Notes:  if supported by the system's power supply, turns off the system power
SeeAlso: AX=5307h/CX=0001h"STAND-BY",AX=530Bh
--------p-155308-----------------------------
INT 15 - Advanced Power Management v1.0+ - ENABLE/DISABLE POWER MANAGEMENT
        AX = 5308h
        BX = device ID for all devices power-managed by APM
            0001h (APM v1.1+)
            FFFFh (APM v1.0)
        CX = new state
            0000h disabled
            0001h enabled
Return: CF clear if successful
        CF set on error
            AH = error code (01h,03h,09h,0Ah,0Bh) (see #00473)
Notes:  when power management is disabled, the system BIOS will not
          automatically power down devices, enter stand-by or suspended mode,
          or perform any power-saving actions in response to AX=5305h calls
        should not be called from within a hardware interrupt handler to avoid
          reentrance problems
        the APM BIOS should never be both disabled and disengaged at the same
          time
SeeAlso: AX=5309h,AX=530Dh,AX=530Fh
--------p-155309-----------------------------
INT 15 - Advanced Power Management v1.0+ - RESTORE POWER-ON DEFAULTS
        AX = 5309h
        BX = device ID for all devices power-managed by APM
            0001h (APM v1.1)
            FFFFh (APM v1.0)
Return: CF clear if successful
        CF set on error
            AH = error code (03h,09h,0Bh) (see #00473)
Note:   should not be called from within a hardware interrupt handler to avoid
          reentrance problems
SeeAlso: AX=5308h
--------p-15530A-----------------------------
INT 15 - Advanced Power Management v1.0+ - GET POWER STATUS
        AX = 530Ah
        BX = device ID
            0001h all devices power-managed by APM
            80xxh specific battery unit number XXh (01h-FFh) (APM v1.2)
Return: CF clear if successful
            BH = AC line status
                00h off-line
                01h on-line
                02h on backup power (APM v1.1)
                FFh unknown
                other reserved
            BL = battery status (see #00476)
            CH = battery flag (APM v1.1+) (see #00477)
            CL = remaining battery life, percentage
                00h-64h (0-100) percentage of full charge
                FFh unknown
            DX = remaining battery life, time (APM v1.1) (see #00478)
            ---if specific battery unit specified---
            SI = number of battery units currently installed
        CF set on error
            AH = error code (09h,0Ah) (see #00473)
Notes:  should not be called from within a hardware interrupt handler to avoid
          reentrance problems
        supported in real mode (INT 15) and both 16-bit and 32-bit protected
          mode

(Table 00476)
Values for APM v1.0+ battery status:
 00h    high
 01h    low
 02h    critical
 03h    charging
 FFh    unknown
 other  reserved
SeeAlso: #00477,#00478

Bitfields for APM v1.1+ battery flag:
Bit(s)  Description     (Table 00477)
 0      high
 1      low
 2      critical
 3      charging
 4      selected battery not present (APM v1.2)
 5-6    reserved (0)
 7      no system battery
Note:   all bits set (FFh) if unknown
SeeAlso: #00476,#00478

Bitfields for APM v1.1+ remaining battery life:
Bit(s)  Description     (Table 00478)
 15     time units: 0=seconds, 1=minutes
 14-0   battery life in minutes or seconds
Note:   all bits set (FFFFh) if unknown
SeeAlso: #00476,#00477
--------p-15530B-----------------------------
INT 15 - Advanced Power Management v1.0+ - GET POWER MANAGEMENT EVENT
        AX = 530Bh
Return: CF clear if successful
            BX = event code (see #00479)
            CX = event information (APM v1.2) if BX=0003h or BX=0004h
                bit 0: PCMCIA socket was powered down in suspend state
        CF set on error
            AH = error code (03h,0Bh,80h) (see #00473)
Notes:  although power management events are often asynchronous, notification
          will not be made until polled via this call to permit software to
          only receive event notification when it is prepared to process
          power management events; since these events are not very time-
          critical, it should be sufficient to poll once or twice per second
        the critical resume notification is made after the system resumes
          from an emergency suspension; normally, the system BIOS only notifies
          its partner that it wishes to suspend and relies on the partner to
          actually request the suspension, but no notification is made on an
          emergency suspension
        should not be called from within a hardware interrupt handler to avoid
          reentrance problems
SeeAlso: AX=5307h,AX=5307h/CX=0001h"STAND-BY",AX=5307h/CX=0002h"SUSPEND"

(Table 00479)
Values for APM event code:
 0001h  system stand-by request
 0002h  system suspend request
 0003h  normal resume system notification
 0004h  critical resume system notification
 0005h  battery low notification
---APM v1.1---
 0006h  power status change notification
 0007h  update time notification
 0008h  critical system suspend notification
 0009h  user system standby request notification
 000Ah  user system suspend request notification
 000Bh  system standby resume notification
---APM v1.2---
 000Ch  capabilities change notification (see AX=5310h)
------
 000Dh-00FFh reserved system events
 01xxh  reserved device events
 02xxh  OEM-defined APM events
 0300h-FFFFh reserved
--------p-15530C-----------------------------
INT 15 - Advanced Power Management v1.1+ - GET POWER STATE
        AX = 530Ch
        BX = device ID (see #00474)
Return: CF clear if successful
            CX = system state ID (see #00475)
        CF set on error
            AH = error code (01h,09h) (see #00473)
SeeAlso: AX=5307h
--------p-15530D-----------------------------
INT 15 - Advanced Power Management v1.1+ - EN/DISABLE DEVICE POWER MANAGEMENT
        AX = 530Dh
        BX = device ID (see #00474)
        CX = function
            0000h disable power management
            0001h enable power management
Return: CF clear if successful
        CF set on error
            AH = error code (01h,03h,09h,0Ah,0Bh) (see #00473)
Desc:   specify whether automatic power management should be active for a
          given device
SeeAlso: AX=5308h,AX=530Fh
--------p-15530E-----------------------------
INT 15 - Advanced Power Management v1.1+ - DRIVER VERSION
        AX = 530Eh
        BX = device ID of system BIOS (0000h)
        CH = APM driver major version (BCD)
        CL = APM driver minor version (BCD) (02h for APM v1.2)
Return: CF clear if successful
            AH = APM connection major version (BCD)
            AL = APM connection minor version (BCD)
        CF set on error
            AH = error code (03h,09h,0Bh) (see #00473)
SeeAlso: AX=5300h,AX=5303h
--------p-15530F-----------------------------
INT 15 - Advanced Power Management v1.1+ - ENGAGE/DISENGAGE POWER MANAGEMENT
        AX = 530Fh
        BX = device ID (see #00474)
        CX = function
            0000h disengage power management
            0001h engage power management
Return: CF clear if successful
        CF set on error
            AH = error code (01h,09h) (see #00473)
Notes:  unlike AX=5308h, this call does not affect the functioning of the APM
          BIOS
        when cooperative power management is disengaged, the APM BIOS performs
          automatic power management of the system or device
SeeAlso: AX=5308h,AX=530Dh
--------p-155310-----------------------------
INT 15 - Advanced Power Management v1.2 - GET CAPABILITIES
        AX = 5310h
        BX = device ID (see #00474)
            0000h (APM BIOS)
            other reserved
Return: CF clear if successful
            BL = number of battery units supported (00h if no system batteries)
            CX = capabilities flags (see #00480)
        CF set on error
            AH = error code (01h,09h,86h) (see #00473)
Notes:  this function is supported via the INT 15, 16-bit protected mode, and
          32-bit protected mode interfaces; it does not require that a
          connection be established prior to use
        this function will return the capabilities currently in effect, not
          any new settings which have been made but do not take effect until
          a system restart
SeeAlso: AX=5300h,AX=530Fh,AX=5311h,AX=5312h,AX=5313h

Bitfields for APM v1.2 capabilities flags:
Bit(s)  Description     (Table 00480)
 15-8   reserved
 7      PCMCIA Ring Indicator will wake up system from suspend mode
 6      PCMCIA Ring Indicator will wake up system from standby mode
 5      Resume on Ring Indicator will wake up system from suspend mode
 4      Resume on Ring Indicator will wake up system from standby mode
 3      resume timer will wake up system from suspend mode
 2      resume timer will wake up system from standby mode
 1      can enter global suspend state
 0      can enter global standby state
--------p-155311-----------------------------
INT 15 - Advanced Power Management v1.2 - GET/SET/DISABLE RESUME TIMER
        AX = 5311h
        BX = device ID (see #00474)
            0000h (APM BIOS)
            other reserved
        CL = function
            00h disable Resume Timer
            01h get Resume Timer
            02h set Resume Timer
                CH = resume time, seconds (BCD)
                DL = resume time, minutes (BCD)
                DH = resume time, hours (BCD)
                SI = resume date (BCD), high byte = month, low byte = day
                DI = resume date, year (BCD)
Return: CF clear if successful
            ---if getting timer---
            CH = resume time, seconds (BCD)
            DL = resume time, minutes (BCD)
            DH = resume time, hours (BCD)
            SI = resume date (BCD), high byte = month, low byte = day
            DI = resume date, year (BCD)
        CF set on error
            AH = error code (03h,09h,0Ah,0Bh,0Ch,0Dh,86h) (see #00473)
Notes:  this function is supported via the INT 15, 16-bit protected mode, and
          32-bit protected mode interfaces
SeeAlso: AX=5300h,AX=5310h,AX=5312h,AX=5313h
--------p-155312-----------------------------
INT 15 - Advanced Power Management v1.2 - ENABLE/DISABLE RESUME ON RING
        AX = 5312h
        BX = device ID (see #00474)
            0000h (APM BIOS)
            other reserved
        CL = function
            00h disable Resume on Ring Indicator
            01h enable Resume on Ring Indicator
            02h get Resume on Ring Indicator status
Return: CF clear if successful
            CX = resume status (0000h disabled, 0001h enabled)
        CF set on error
            AH = error code (03h,09h,0Ah,0Bh,0Ch,86h) (see #00473)
Notes:  this function is supported via the INT 15, 16-bit protected mode, and
          32-bit protected mode interfaces
SeeAlso: AX=5300h,AX=5310h,AX=5311h,AX=5313h
--------p-155313-----------------------------
INT 15 - Advanced Power Management v1.2 - ENABLE/DISABLE TIMER-BASED REQUESTS
        AX = 5313h
        BX = device ID (see #00474)
            0000h (APM BIOS)
            other reserved
        CL = function
            00h disable timer-based requests
            01h enable timer-based requests
            02h get timer-based requests status
Return: CF clear if successful
            CX = timer-based requests status (0000h disabled, 0001h enabled)
        CF set on error
            AH = error code (03h,09h,0Ah,0Bh,86h) (see #00473)
Notes:  this function is supported via the INT 15, 16-bit protected mode, and
          32-bit protected mode interfaces
        some BIOSes set AH on return even when successful
SeeAlso: AX=5300h,AX=5310h,AX=5311h,AX=5312h
--------p-155380BH00-------------------------
INT 15 - APM SL Enhanced v1.0 - GET SUSPEND/GLOBAL STANDBY MODE
        AX = 5380h
        BH = 00h
Return: CF clear if successful
            AL = 82360SL Auto Power Off Timer High Count (APWR_TMRH)
            BL = sustdbymode (see #00481)
SeeAlso: AX=5380h/BH=01h,AX=5380h/BH=02h,AX=5380h/BH=7Fh

Bitfields for APM SL sustdbymode:
Bit(s)  Description     (Table 00481)
 2      ???
 1      Auto Power Off Timer Enable (APWR_TMR_EN)
 0      ???
--------p-155380BH01-------------------------
INT 15 - APM SL Enhanced v1.0 - SET SUSPEND/GLOBAL STANDBY MODE
        AX = 5380h
        BH = 01h
        BL = sustdbymode (see #00481)
Return: CF clear if successful
SeeAlso: AX=5380h/BH=00h,AX=5380h/BH=7Fh
--------p-155380BH02-------------------------
INT 15 - APM SL Enhanced v1.0 - GET GLOBAL STANDBY TIMER
        AX = 5380h
        BH = 02h
Return: CF clear if successful
        SI:DI = timer count in seconds (actually 1.024 seconds)
Desc:   reads the value of 82360SL GSTDBY_TMRH & GSTDBY_TMRL registers
SeeAlso: AX=5380h/BH=00h,AX=5380h/BH=03h,AX=5380h/BH=04h,AX=5380h/BH=7Fh
--------p-155380BH03-------------------------
INT 15 - APM SL Enhanced v1.0 - SET GLOBAL STANDBY TIMER
        AX = 5380h
        BH = 03h
        SI:DI = timer count in seconds (actually 1.024 seconds)
Return: CF clear if successful
Desc:   sets the value of 82360SL GSTDBY_TMRH & GSTDBY_TMRL registers
Note:   the maximum timer count is 268431 seconds
SeeAlso: AX=5380h/BH=02h,AX=5380h/BH=7Fh
--------p-155380BH04-------------------------
INT 15 - APM SL Enhanced v1.0 - GET AUTO POWER OFF TIMER
        AX = 5380h
        BH = 04h
Return: CF clear if successful
        SI:DI = timer count in seconds (actually 1.024 seconds)
Desc:   reads the value of 82360SL APWR_TMRH & APWR_TMRL registers
SeeAlso: AX=5380h/BH=02h,AX=5380h/BH=05h,AX=5380h/BH=06h,AX=5380h/BH=7Fh
--------p-155380BH05-------------------------
INT 15 - APM SL Enhanced v1.0 - SET AUTO POWER OFF TIMER
        AX = 5380h
        BH = 05h
        SI:DI = timer count in seconds (actually 1.024 seconds)
Return: CF clear if successful
Desc:   sets the value of 82360SL APWR_TMRH & APWR_TMRL registers
Note:   the maximum timer count is 134213 seconds
SeeAlso: AX=5380h/BH=04h,AX=5380h/BH=7Fh
--------p-155380BH06-------------------------
INT 15 - APM SL Enhanced v1.0 - GET RESUME CONDITION
        AX = 5380h
        BH = 06h
Return: CF clear if successful
            BL = resume condition (see #00482)
Desc:   reads the value of 82360SL RESUME_MASK register
SeeAlso: AX=5380h/BH=04h,AX=5380h/BH=07h,AX=5380h/BH=08h,AX=5380h/BH=7Fh

Bitfields for APM SL resume condition:
Bit(s)  Description     (Table 00482)
 7-2    reserved (0)
 1      alarm enabled (resume on CMOS alarm)
 0      ring enabled
--------p-155380BH07-------------------------
INT 15 - APM SL Enhanced v1.0 - SET RESUME CONDITION
        AX = 5380h
        BH = 07h
        BL = resume condition (see #00482)
Return: CF clear if successful
Desc:   sets the value of 82360SL RESUME_MASK register
SeeAlso: AX=5380h/BH=06h,AX=5380h/BH=7Fh
--------p-155380BH08-------------------------
INT 15 - APM SL Enhanced v1.0 - GET CALENDAR EVENT TIME
        AX = 5380h
        BH = 08h
Return: CF clear if successful
            CH = hours
            CL = minutes
            SI = seconds
        CF set on error
            AH = error code (see #00483)
Desc:   gets calendar event time from CMOS ram
SeeAlso: AX=5380h/BH=06h,AX=5380h/BH=09h,AX=5380h/BH=0Ah,AX=5380h/BH=7Fh

(Table 00483)
Values for APM SL error code:
 02h    no alarm set
 03h    no battery
--------p-155380BH09-------------------------
INT 15 - APM SL Enhanced v1.0 - SET CALENDAR EVENT TIME
        AX = 5380h
        BH = 09h
        CH = hours
        CL = minutes
        SI = seconds
Return: CF clear if successful
        CF set on error
            AH = error code (see #00483)
Desc:   sets calendar event time in CMOS ram, enables Alarm resume
SeeAlso: AX=5380h/BH=08h,AX=5380h/BH=7Fh
--------p-155380BH0A-------------------------
INT 15 - APM SL Enhanced v1.0 - GET CALENDAR EVENT DATE
        AX = 5380h
        BH = 0Ah
Return: CF clear if successful
            SI = century
            DI = year
            CH = month
            CL = day
        CF set on error
            AH = error code (see #00483)
Desc:   reads calendar event date from Extended CMOS ram
SeeAlso: AX=5380h/BH=08h,AX=5380h/BH=0Bh,AX=5380h/BH=0Ch,AX=5380h/BH=7Fh
--------p-155380BH0B-------------------------
INT 15 - APM SL Enhanced v1.0 - SET CALENDAR EVENT DATE
        AX = 5380h
        BH = 0Bh
        SI = century
        DI = year
        CH = month
        CL = day
Return: CF clear if successful
        CF set on error
            AH = error code (see #00483)
Desc:   sets calendar event date in Extended CMOS ram
SeeAlso: AX=5380h/BH=0Ah,AX=5380h/BH=7Fh
--------p-155380BH0C-------------------------
INT 15 - APM SL Enhanced v1.0 - GET CPU SPEED MODE
        AX = 5380h
        BH = 0Ch
Return: CF clear if successful
        CL = CPU clock divider (1,2,4 or 8)
        BL = autocpumode ???
Desc:   reads bits 4-5 of CPUPWRMODE register
SeeAlso: AX=5380h/BH=0Ah,AX=5380h/BH=0Dh,AX=5380h/BH=7Fh
--------p-155380BH0D-------------------------
INT 15 - APM SL Enhanced v1.0 - SET CPU SPEED MODE
        AX = 5380h
        BH = 0Dh
        CL = CPU clock divider (1,2,4 or 8)
        BL = autocpumode ???
Return: CF clear if successful
Desc:   writes bits 4-5 of CPUPWRMODE register
SeeAlso: AX=5380h/BH=0Ch,AX=5380h/BH=7Eh,AX=5380h/BH=7Fh
--------p-155380BH7E-------------------------
INT 15 - APM SL Enhanced v1.0 - SL HW PARAMETER
        AX = 5380h
        BH = 7Eh
Return: AL = ???
            03h on A-Step 386SL BIOSes
            12h on later steps
        BX = Control port (00B0h)
SeeAlso: AX=5380h/BH=00h,AX=5380h/BH=7Fh
--------p-155380BH7F-------------------------
INT 15 - Advanced Power Management v1.1 - OEM APM INSTALLATION CHECK
        AX = 5380h
        BH = 7Fh
Return: CF clear if successful
            BX = OEM identifier
            all other registers OEM-defined
            ---Intel SL Enhanced Option BIOS---
            BX = 534Ch ('SL')
            CL = 4Fh ('O')
            AL = version (10h = 1.0)
            ---HP APM BIOS---
            BX = 4850h ('HP')
            CX = version (0001h)
        CF set on error
            AH = error code (03h) (see #00473)
SeeAlso: AX=5380h/BH=00h
--------p-155380-----------------------------
INT 15 - Advanced Power Management v1.1 - OEM APM FUNCTIONS
        AX = 5380h
        BH <> 7Fh
        all other registers OEM-defined
Return: OEM-defined
SeeAlso: AX=5380h/BH=7Fh
--------p-155380BX8000-----------------------
INT 15 U - Phoenix BIOS 4.0 Rel 6.0 - ???
        AX = 5380h
        BX = 8000h
        CX = 0020h
Return: ???
Note:   although a check for the indicated value is present in the examined
          copy of the BIOS, no code was associated with it (possibly an OEM
          option not included in that copy) and this function always returns
          CF set/AH=03h if CX=0020h and CF set/AH=86h for CX<>0020h
SeeAlso: AX=5380h/BX=8001h
--------p-155380BX8001-----------------------
INT 15 U - Phoenix BIOS 4.0 Rel 6.0 - ???
        AX = 5380h
        BX = 8001h
        CX = 0020h
Return: ???
Note:   although a check for the indicated value is present in the examined
          copy of the BIOS, no code was associated with it (possibly an OEM
          option not included in that copy)
SeeAlso: AX=5380h/BX=8000h
--------X-1553B0BH00-------------------------
INT 15 - Intel System Management Bus - RESERVED
        AX = 53B0h
        BH = 00h
Program: the SMBus is a variant of ACCESS.bus being used by Intel and Duracell
          for the Smart Battery proposal, but designed to be generic enough to
          handle other devices besides batteries
--------X-1553B0BH01-------------------------
INT 15 - Intel System Management Bus - INSTALLATION CHECK
        AX = 53B0h
        BH = 01h
        BL = 72h ('r')
        CX = 6164h ('ad')
Return: CF clear if installed
            AH = SMBus BIOS Interface Specification major version (01h)
            AL = SMBus BIOS Interface Specification minor version (00h)
            BL = number of SMBus devices present
            CX = 6941h ('iA')
            DX = vendor-specified SMBus hardware code
                0000h means undefined hardware type
        CF set if error
            AH = Error code 0Ah, 86h (see #00484)
Note:   this function is only supported in INT 15h mode
SeeAlso: AX=53B0h/BH=02h,AX=53B0h/BH=03h,AX=53B0h/BH=04h,AX=53B0h/BH=06h
SeeAlso: #01105 at INT 1A/AX=B10Ah/SF=8086h

(Table 00484)
Values for Intel System Management Bus error codes:
 00h    SMBus OK
 01h    SMBus connect failed
 02h    SMBus already connected (see also #00485)
 03h    SMBus disconnect failed
 04h    SMBus not connected
 05h    SMBus INT 15 interface disabled
 06h    SMBus device address request out of range
 07h    SMBus unknown failure
 08h    SMBus message list empty
 09h    SMBus message list overflow
 0Ah    SMBus invalid signature
 10h    SMBus device address not acknowledged
 11h    SMBus device error detected
 12h    SMBus device command access denied
 13h    SMBus unknown error
 14h    SMBus transaction pending
 15h    SMBus no transaction pending
 16h    SMBus request does not match pending transaction
 17h    SMBus device access denied
 18h    SMBus timeout
 19h    SMBus protocol not supported
 1Ah    SMBus busy
 1Bh    SMBus SMI detected
 80h    SMBus OK (previously unreported SMI occurred)
 86h    SMBus not supported

(Table 00485)
Values for Intel System Management Bus Already Connected sub-error codes:
 01h    real mode connect already established
 02h    16-bit PMode connect already established
 03h    32-bit PMode connect already established
SeeAlso: #00484
--------X-1553B0BH02-------------------------
INT 15 - Intel System Management Bus - REAL MODE CONNECT
        AX = 53B0h
        BH = 02h
        CX = 6941h ('iA')
Return: CF clear if successful
            AX = SMBus Real mode code segment
            BX = offset of entry point into SMBus BIOS Interface
            CX = SMBus Real mode data segment
        CF set if error
            AH = error code (01h,02h,0Ah,86h) (see #00484)
            AL = sub-error code if error code is 02h (see #00485)
Desc:   connect to SMBus interface; once connected, all SMBus calls are made
          to the supplied entry point instead of INT 15 (with registers
          identical to those described here for INT 15)
Notes:  Support for this function is optional
        this function is only supported in INT 15 mode when implemented
SeeAlso: AX=53B0h/BH=01h,AX=53B0h/BH=03h,AX=53B0h/BH=04h,AX=53B0h/BH=05h
--------X-1553B0BH03-------------------------
INT 15 - Intel System Management Bus - 16-BIT PROTECTED-MODE CONNECT
        AX = 53B0h
        BH = 03h
        CX = 6941h ('iA')
Return: CF clear if successful
            AX = SMBus 16-bit code segment (real mode base address)
            BX = offset of entry point into SMBus BIOS Interface
            CX = SMBus 16-bit data segment (real mode base address)
            SI = code segment length in bytes
            DI = data segment length in bytes
        CF set if error
            AH = error code (01h,02h,0Ah,86h) (see #00484)
            AL = sub-error code if error code is 02h (see #00485)
Desc:   connect to SMBus interface; once connected, all SMBus calls are made
          to the supplied entry point instead of INT 15 (with registers
          identical to those described here for INT 15)
Notes:  before calling the entry point, two descriptors must be initialized
          in the GDT or LDT.  They must be consecutive and be in the order of
          code, then data.  At the time of the call, the descriptors must be
          valid and have CPL=0.
        the code descriptor must be ring-0 privilege
        this function is only supported in INT 15 mode
SeeAlso: AX=53B0h/BH=01h,AX=53B0h/BH=02h,AX=53B0h/BH=04h,AX=53B0h/BH=05h
--------X-1553B0BH04-------------------------
INT 15 - Intel System Management Bus - 32-BIT PROTECTED-MODE CONNECT
        AX = 53B0h
        BH = 04h
        CX = 6941h ('iA')
Return: CF clear if successful
            AX = SMBus 32-bit code segment (real mode base address)
            EBX = offset of entry point into SMBus BIOS Interface
            CX = SMBus 16-bit code segment (real mode base address)
            DX = SMBus data segment (real mode base address)
            SI = code segment length in bytes
            DI = data segment length in bytes
        CF set if error
            AH = error code (01h,02h,0Ah,86h) (see #00484)
            AL = sub-error code if error code is 02h (see #00485)
Desc:   connect to SMBus interface; once connected, all SMBus calls are made
          to the supplied entry point instead of INT 15 (with registers
          identical to those described here for INT 15)
Notes:  before calling the entry point, two descriptors must be initialized in
          the GDT or LDT.  They must be consecutive and be in the order of
          32-bit code, 16-bit code, then data.  At the time of the call, the
          descriptors must be valid and have CPL=0.
        the code descriptors must be ring-0 privilege
        this function is supported only in INT 15 mode
SeeAlso: AX=53B0h/BH=01h,AX=53B0h/BH=02h,AX=53B0h/BH=03h,AX=53B0h/BH=05h
--------X-1553B0BH05-------------------------
INT 15 - Intel System Management Bus - DISCONNECT
        AX = 53B0h
        BH = 05h
        CX = 6941h ('iA')
Return: CF clear if successful
            AH = 00h (SMBus OK)
        CF set if error
            AH = error code (03h,04h,05h,0Ah,86h) (see #00484)
Note:   this function is supported in connected mode (far CALL entry point)
          only
SeeAlso: AX=53B0h/BH=01h,AX=53B0h/BH=02h,AX=53B0h/BH=03h,AX=53B0h/BH=04h
--------X-1553B0BH06-------------------------
INT 15 - Intel System Management Bus - GET DEVICE ADDRESSES
        AX = 53B0h
        BH = 06h
        BL = position in list to report
        CH = 6941h ('iA')
Return: CF clear if successful
            AH = 00h (SMBus OK)
            BH = number of SMBus devices
            BL = SMBus Device Address of device at position BL in list
                (see #00486)
        CF set if error
            AH = error code (06h,0Ah,86h) (see #00484)
Desc:   retrieves already assigned SMBus device addresses
Notes:  this function is supported in INT 15h mode only
        bit 0 of the device address indicates read/write, so a device may
          be listed at both xxxxxxx0b and xxxxxxx1b
SeeAlso: I2C A0h [and I2C.LST in general]

(Table 00486)
Values for System Management Bus predefined device addresses:
 10h    SMBus host
 12h    Smart Battery charger
 14h    Smart Battery selector
 16h    Smart Battery
 18h    SMBus Alert response
 50h    ACCESS.bus host
 58h    LCD contrast controller
 5Ah    CCFL backlight driver
 6Eh    ACCESS.bus default address
 80h-86h PCMCIA socket controllers
 88h    VGA graphics controller
 90h-96h unrestricted addresses
 82h    SMBus device default address
--------X-1553B0BH07-------------------------
INT 15 - Intel System Management Bus - RETRIEVE CRITICAL MESSAGES
        AX = 53B0h
        BH = 07h
        CX = 6941h ('iA')
Return: CF clear if successful
            AH = 00h (SMBus OK)
            AL = device address
            BX = device message
        CF set if error
            AH = error code (05h,07h,08h,09h,0Ah,86h) (see #00484)
Desc:   retrieves oldest queued critical message from an SMBus device to the
          host
Notes:  up to five messages are queued; if the queue is full, messages will be
          lost and error 09h returned
--------X-1553B0BH08-------------------------
INT 15 - Intel System Management Bus - RESERVED
        AX = 53B0h
        BH = 08h-0Fh
--------X-1553B0BH10-------------------------
INT 15 - Intel System Management Bus - REQUEST
        AX = 53B0h
        BH = 10h
        BL = protocol (see #00487)
        CH = device address
        CL = device command (see #00488)
        DH = MSB Data or block length (for BlockWrite)
        DL = LSB Data or first byte of block (for BlockWrite)
Return: CF clear if successful
            AH = 00h or 80h (SMBus OK)
                 (80h indicates a previously unreported SMI took place)
        CF set if error
            AH = error code (05h,10h,11h,12h,13h,14h,17h,19h,1Ah,86h)
                  (see #00484)
Desc:   request access to a device on the SMBus
SeeAlso: AX=53B0h/BH=11h, AX=53B0h/BH=13h

(Table 00487)
Values for Intel System Management Bus protocol codes:
 00h    Quick Command
 01h    Send Byte
 02h    Receive Byte
 03h    Write Byte
 04h    Read Byte
 05h    Write Word
 06h    Read Word
 07h    Block Write
 08h    Block Read
 09h    Process Call
 0Ah-FFh reserved
SeeAlso: #00488

(Table 00488)
Values for Intel System Management Bus Smart Battery command codes:
 Cmd    Protocol(s)     Description
 00h    Rd/Wr Word      "ManufacturerAccess" implementation-specific
 01h    Rd/Wr Word      get/set Low Capacity Alarm threshold
 02h    Rd/Wr Word      get/set Remaining Time Alarm value (in minutes)
 03h    Rd/Wr Word      get/set battery characteristics (see #00489)
 04h    Rd/Wr Word      "AtRate" indicate charge/discharge rate
 05h    Read Word       "AtRateTimeToFull" time to completely charge (in min.)
 06h    Read Word       "AtRateTimeToEmpty" time to entirely discharge (min.)
 07h    Read Word       "AtRateOK" boolean: can battery supply another 10sec?
 08h    Read Word       internal battery temperature (in 0.1 Kelvins)
 09h    Read Word       current battery voltage in millivolts
 0Ah    Read Word       current flowing through battery in milliamperes
                        (positive if charging, negative if discharging)
 0Bh    Read Word       average current over the past minute
 0Ch    Read Word       expected error margin in capacity computations in %
 0Dh    Read Word       predicted remaining charge as % of full charge
 0Eh    Read Word       predicted remaining charge as % of design capacity
 0Fh    Read Word       predicted remaining charge in mAh or 10mWh
 10h    Read Word       predicted full charge capacity in mAh or 10mWh
 11h    Read Word       predicted remaining battery life in minutes
                        FFFFh = not discharging
 12h    Read Word       rolling average of predicted life over past minute
 13h    Read Word       rolling average of predicted charge time over past min.
                        FFFFh = not charging
 14h    Read Word       get battery's desired charging current in mA
 14h    Write Word      set charging current in mA
 15h    Read Word       get battery's desired charging current in mV
 15h    Write Word      set desired charging voltage in mV
 16h    Read Word       get current battery status (see #00490)
 17h    Read Word       get number of charge/discharge cycles for battery
 18h    Read Word       get design capacity in mAh or 10mWh
 19h    Read Word       get design voltage
 1Ah    Read Word       get specification information (see #00491)
 1Bh    Read Word       get manufacture date (see #01665 at INT 21/AX=5700h)
 1Ch    Read Word       get serial number
 1Dh-1Fh                reserved
 20h    Read Block      get manufacturer's name
 21h    Read Block      get device name
 22h    Read Block      get device chemistry (see #00492)
 23h    Read Block      get manufacturer data
 24h-2Eh                reserved
 2Fh                    manufacturer-specific
 30h-3Bh                reserved
 3Ch-3Fh                manufacturer-specific
Note:   bits 7-6 are reserved for addressing multiple batteries in a future
          version of the specification
SeeAlso: #00487

Bitfields for Smart Battery battery characteristics:
Bit(s)  Description     (Table 00489)
 0      battery has internal charge controller (read-only)
 1      primary/secondary battery support (read-only)
 6-2    reserved
 7      conditioning cycle requested
 8      internal charge controller enabled
 9      battery operating in primary mode
 13-10  reserved
 14     disable broadcast to charger
 15     report capacity in units of 10mW / 10mWh instead of mA / mAh
SeeAlso: #00488,#00490

Bitfields for Smart Battery battery status:
Bit(s)  Description     (Table 00490)
 15     overcharged
 14     terminate-charge alarm
 13     reserved
 12     over-temperature alarm
 11     terminate-discharge alarm
 10     reserved
 9      remaining-capacity alarm
 8      remaining-time alarm
 7      initialized
 6      charging
 5      fully charged
 4      fully discharged
 3-0    error codes
        0000 OK
        0001 busy
        0010 reserved command
        0011 unsupported command
        0100 access denied (tried to write to read-only value)
        0101 overflow/underflow
        0110 bad size
        0111 unknown error
SeeAlso: #00488,#00489,#00491

Bitfields for Smart Battery specification information:
Bit(s)  Description     (Table 00491)
 3-0    SmartBattery specification minor revision number
 7-4    SmartBattery specification version number
 11-8   voltage scaling (0-3, multiply voltages by 10^scale)
 15-12  current scaling (0-3, multiply currents by 10^scale)
SeeAlso: #00488,#00490

(Table 00492)
Values for Smart Battery device chemistry (not case-sensitive):
 "LION" Lithium ion
 "NiMH" Nickel metal hydride
 "PbAc" lead-acid
 "NiCd" Nickel Cadmium
 "NiZn" Nickel Zinc
 "RAM"  rechargeable Alkaline Manganese
 "ZnAr" Zinc-Air
SeeAlso: #00488
--------X-1553B0BH11-------------------------
INT 15 - Intel System Management Bus - REQUEST CONTINUATION
        AX = 53B0h
        BH = 11h
        BL = protocol (see #00487)
        CH = device address
        CL = number of valid bytes in DX (1 or 2)
        DH = MSB Data (CL = 1 or 2)
        DL = LSB Data (CL = 2)
Return: CF clear if successful
            AH = 00h (SMBus OK)
            CL = SMBus status
                00h SMBus hardware not ready for more data
                01h SMBus hardware ready for 2 more data bytes
        CF set if error
            AH = error code (05h,11h,13h,15h,16h,18h,1Bh,86h) (see #00484)
Desc:   continue WriteBlock protocol started with function 10h
SeeAlso: AX=53B0h/BH=10h, AX=53B0h/BH=13h
--------X-1553B0BH12-------------------------
INT 15 - Intel System Management Bus - REQUEST ABORT
        AX = 53B0h
        BH = 12h
        BL = protocol (see #00487)
        CH = device address
        CL = device command
Return: CF clear if successful
            AH = 00h (SMBus OK)
        CF set if error
            AH = error code (05h,13h,15h,16h,86h) (see #00484)
Desc:   stop the currently pending SMBus request; usually used to terminate
          a request after an SMI Detected error
--------X-1553B0BH13-------------------------
INT 15 - Intel System Management Bus - REQUEST DATA AND STATUS
        AX = 53B0h
        BH = 13h
        BL = protocol (see #00487)
        CH = device address
        CL = device command
Return: CF clear if successful
            AH = 00h (SMBus OK)
            CH = status
                00h no data pending, transaction complete
                01h no data pending, transaction continues
                02h data pending
            CL = number of valid bytes in DX (0-2)
            DH = MSB data
            DL = LSB data
        CF set if error
            AH = error code (05h,10h,11h,13h,15h,16h,18h,1Bh,86h) (see #00484)
Desc:   determine when a transaction is complete, gather data returned by read
          transactions
Note:   for Block Read protocol (08h), first call returns block length in DH
          and the first byte of the block in DL
----------1554-------------------------------
INT 15 - IBM SurePath BIOS - Officially "Private" Function
        AH = 54h
SeeAlso: AH=07h"IBM",AH=3Eh"IBM"
--------T-155400-----------------------------
INT 15 C - Omniview Multitasker - INSTALLATION NOTIFICATION
        AX = 5400h
        ES:BX -> device information tables
        DI:DX -> dispatcher entry point
Note:   called by OmniView to notify programs loaded before OmniView of state
          changes inside OmniView
SeeAlso: AX=5407h,INT 2F/AX=DE00h
--------T-155401-----------------------------
INT 15 C - Omniview Multitasker - PROCESS CREATION
        AX = 5401h
        ES:BX = process handle
Note:   called by OmniView to notify programs loaded before OmniView of state
          changes inside OmniView
SeeAlso: AX=5402h,INT 2F/AX=DE04h
--------T-155402-----------------------------
INT 15 C - Omniview Multitasker - PROCESS DESTRUCTION
        AX = 5402h
        ES:DX = process handle
Note:   called by OmniView to notify programs loaded before OmniView of state
          changes inside OmniView
SeeAlso: AX=5401h,INT 2F/AX=DE05h
--------T-155403-----------------------------
INT 15 C - Omniview Multitasker - SAVE
        AX = 5403h
        ES:DX = process swapping out
Note:   called by OmniView to notify programs loaded before OmniView of state
          changes inside OmniView
SeeAlso: AX=5404h,INT 2F/AX=DE08h
--------T-155404-----------------------------
INT 15 C - Omniview Multitasker - RESTORE
        AX = 5404h
        ES:DX = process swapping in
Note:   called by OmniView to notify programs loaded before OmniView of state
          changes inside OmniView
SeeAlso: AX=5403h,INT 2F/AX=DE09h
--------T-155405-----------------------------
INT 15 C - Omniview Multitasker - SWITCHING TO BACKGROUND
        AX = 5405h
        ES:DX = process swapping in
Note:   called by OmniView to notify programs loaded before OmniView of state
          changes inside OmniView
SeeAlso: AX=5406h
--------T-155406-----------------------------
INT 15 C - Omniview Multitasker - SWITCHING TO FOREGROUND
        AX = 5406h
        ES:DX = process swapping in
Note:   called by OmniView to notify programs loaded before OmniView of state
          changes inside OmniView
SeeAlso: AX=5405h
--------T-155407-----------------------------
INT 15 C - Omniview Multitasker - EXIT NOTIFICATION
        AX = 5407h
Note:   called by OmniView to notify programs loaded before OmniView of state
          changes inside OmniView
SeeAlso: AX=5400h,INT 2F/AX=DE03h
--------V-155F31-----------------------------
INT 15 C - Chips & Technologies '65530' BIOS - POST INITIALIZATION NOTIFICATION
        AX = 5F31h
Return: nothing
Desc:   this function is called after the video BIOS completes power-up
          initialization and just prior to displaying the sign-on message
SeeAlso: AX=5F33h,AX=5F35h,INT 10/AX=5F50h
--------V-155F33-----------------------------
INT 15 C - Chips & Technologies '65530' BIOS - MODE SET HOOK
        AX = 5F33h
        BL = current width in characters
        BH = curent video mode
        CH = active display page
Return: nothing
Desc:   this function is called at the end of a video mode set
Note:   the OEM has the option of enabling or disabling this callout, as well
          as specifying whether the callout occurs on INT 15h or INT 42h
SeeAlso: AX=5F31h,AX=5F35h,INT 10/AX=5F50h,INT 42/AX=5F33h
--------V-155F35-----------------------------
INT 15 C - Chips & Technologies '65530' BIOS - MONITOR SENSING HOOK
        AX = 5F35h
Return: DL = boot display
            00h CRT
            01h flat panel (LCD)
            02h both simultaneously
            leave unchanged to boot according to BIOS settings
SeeAlso: AX=5F31h,AX=5F33h,INT 10/AX=5F50h
--------b-1560------------------------------------
INT 15 - HUNTER 16 - SET SYSTEM CLOCK SPEED
        AH = 60h
        AL = new speed
            00h normal (8 MHz)
            01h Slow Mode 1 (4 MHz)
            02h Slow Mode 2 (2 MHz)
Note:   the Husky Hunter 16 is an 8088-based ruggedized laptop.  Other family
          members are the Husky Hunter, Husky Hunter 16/80, and Husky Hawk.
SeeAlso: AX=6301h
--------p-156000-----------------------------
INT 15 U - HP 100LX/200LX - GET MAIN BATTERY LEVEL
        AX = 6000h
Return: AX = battery level
Note:   multiply the returned value with 1Bh and add 622h to get millivolts
SeeAlso: AX=6001h,AX=6002h,AX=6003h,AX=6004h
--------p-156001-----------------------------
INT 15 U - HP 100LX/200LX - GET BACKUP BATTERY LEVEL
        AX = 6001h
Return: AX = battery level
Note:   multiply the returned value with 1Bh and add 622h to get millivolts
SeeAlso: AX=6000h,AX=6002h
--------p-156002-----------------------------
INT 15 U - HP 100LX/200LX - GET POWER INFO
        AX = 6002h
Return: AL = power settings (see #00493)
SeeAlso: AX=6000h,AX=6003h,AX=6004h

Bitfields for power settings:
Bit(s)  Description     (Table 00493)
 0-1    unused ???
 2      card battery status low (OK if bit clear)
 3      battery charging off (disabled if bits 3-5 clear)
 4      battery charging slow
 5      battery charging fast
 6      power adaptor active
 7      battery type NiCad (alkaline if bit clear)
--------p-156003-----------------------------
INT 15 U - HP 100LX/200LX - SET MAIN BATTERY TYPE
        AX = 6003h
        BL = battery type
            00h alkaline
            01h NiCad
SeeAlso: AX=6000h,AX=6004h
--------p-156004-----------------------------
INT 15 U - HP 100LX/200LX - SET BATTERY CHARGING MODE
        AX = 6004h
        BL = charging
            00h disabled
            01h enabled
SeeAlso: AX=6000h,AX=6003h
--------b-1561------------------------------------
INT 15 - HUNTER 16 - GET POWER LEVEL
        AH = 61h
Return: AH = percentage of full power left (0..100)
Desc:   determine how much battery power is left
SeeAlso: AH=62h,AH=66h,AH=73h"HUNTER"
--------b-1561-------------------------------
INT 15 U - HP 100LX/200LX - SET ANNOUNCIATORS POSITION
        AH = 61h
        AL = position (20h = left, 60h = right)
Note:   The announciators are the indicator symbols for the Shift and Fn keys
          in the bottom line
SeeAlso: AH=62h"HP",INT 16/AH=02h
--------b-1562------------------------------------
INT 15 - HUNTER 16 - SET LOW POWER THRESHOLD
        AH = 62h
        AL = level (00h 5%, 01h 10%, ... 12h 95%)
        BX = interval between power low warnings in seconds (1..600)
Return: AH = Status
Desc:   set the level (relative to full power) when power-low warnings begin
          and the interval between the warnings
SeeAlso: AH=61h,AH=65h,AH=66h
--------b-1562-------------------------------
INT 15 U - HP 100LX/200LX - SET DISPLAY CONTRAST
        AH = 62h
        BL = contrast (00h-1Fh, 1Fh is the darkest)
SeeAlso: AH=47h"HP",AH=61h"HP"
--------b-156300----------------------------------
INT 15 - HUNTER 16 - GET IDLE TIMEOUT
        AX = 6300h
Return: AH = status
        BX = timeout in seconds (0-3600)
Desc:   get the idle timeout value, the interval without keyboard or
           communications activity before the system shuts down
SeeAlso: AX=6301h
--------b-156301----------------------------------
INT 15 - HUNTER 16 - SET IDLE TIMEOUT
        AX = 6301h
        BX = timeout in seconds (0-3600)
Desc:   sets the idle timeout value, the interval without keyboard or
          communications activity before the system shuts down
SeeAlso: AX=6300h
--------b-1564------------------------------------
INT 15 - HUNTER 16 - CONTROL RESUME MODE
        AH = 64h
        AL = new state
            00h disable Resume mode
            01h enable Resume mode
Return: AH = status
Desc:   turn Resume mode on or off. In Resume mode the system starts in
          the application that was running when it shut down as if nothing
          had happened.
SeeAlso: AH=67h,AH=68h,AH=69h
--------b-1565------------------------------------
INT 15 - HUNTER 16 - AUTHORISE CHARGING
        AH = 65h
        AL = charging level
            01h charging not allowed
            02h charging allowed until power down
            03h charging allowed until batteries changed or fail.
                Ask user if charging is still allowed on next poweron
            04h charging allowed indefinitely
        BX = 0203h
        CX = 0405h
        DX = 0607h
Return: AH = status
SeeAlso: AH=66h,AH=68h
--------b-1566------------------------------------
INT 15 - HUNTER 16 - SET BATTERY LEVEL
        AH = 66h
        AL = level in percent of maximum (0..100)
Return: AH = status
SeeAlso: AH=61h,AH=65h
--------b-1567------------------------------------
INT 15 - HUNTER 16 - CONTROL STOP MODE
        AH = 67h
        AL = mode when waiting for input
            00h use STOP mode (allows communication)
            01h use HALT mode (disallows communication)
Return: AH = status
Desc:   select the power save mode to use when waiting for input
SeeAlso: AH=69h
--------b-1568------------------------------------
INT 15 - HUNTER 16 - REQUEST POWER DOWN
        AH = 68h
Desc:   turns off the Hunter 16 if power down is allowed (see AH=69h)
SeeAlso: AH=69h
--------b-1569------------------------------------
INT 15 - HUNTER 16 - CONTROL POWER DOWN AVAILABILITY
        AH = 69h
        AL = mode
            00h inhibit power down
            01h allow power down
Return: AH = status
SeeAlso: AH=67h,AH=68h,AH=6Ah
--------b-156A------------------------------------
INT 15 - HUNTER 16 - CONTROL SLOW MODE
        AH = 6Ah
        AL = mode
            00h inhibit Slow mode
            01h allow Slow mode
Return: AH = status
SeeAlso: AH=69h
--------b-156B------------------------------------
INT 15 - HUNTER 16 - GET ROM BIOS VERSION
        AH = 6Bh
Return: BH = version number (ASCII)
        BL = release number (ASCII)
        CH = major??? release number (ASCII)
        CL = minor??? release number (ASCII)
SeeAlso: AH=6Ch
--------b-156C------------------------------------
INT 15 - HUNTER 16 - GET SERIAL NUMBER
        AH = 6Ch
Return: BL:CX = BCD serial number
Note:   when shipped, all Hunter 16s have the same Serial Number, but a
          different number can be stored (see AH=72h)
SeeAlso: AH=6Bh,AH=72h
--------b-156D------------------------------------
INT 15 - HUNTER 16 - GET EVENT DETAIL
        AH = 6Dh
Return: AH = 00h if successful
        CX:BX = event flags bit 0..31 (see #00494)
Note:   this function allows testing for events
SeeAlso: AH=6Eh,AH=6Fh

Bitfields for HUNTER 16 events:
Bit(s)  Description     (Table 00494)
 6      RI received
 5      RTC Alarm
 4      data received on COM2
 3      data received on COM1
 2      error on COM2
 1      error on COM1
 0      PWR button pressed
--------b-156E------------------------------------
INT 15 - HUNTER 16 - ENABLE/TRAP EVENT
        AH = 6Eh
        AL = Software Interrupt
              00h  do not trap event
              else trap as software interrupt number AL
        BH = event number (see AH=6Dh)
        BL = enable mask
            00h disable event
            01h enable event
Return: AH = 00h if successful
SeeAlso: AH=6Dh,AH=6Fh
--------b-156F------------------------------------
INT 15 - HUNTER 16 - ACKNOWLEDGE EVENT
        AH = 6Fh
        AL = event number (see AH=6Dh)
Return: AH = 00h if successful
Desc:   Acknowledges the event, so the next similar event can be detected
SeeAlso: AH=6Dh"HUNTER",AH=6Eh
--------b-1570------------------------------------
INT 15 - HUNTER 16 - CONTROL SOUND
        AH = 70h
        AL = new state
            00h disable sound
            else enable sound
Note:   the Husky Hunter 16 is an 8088-based ruggedized laptop.  Other family
          members are the Husky Hunter, Husky Hunter 16/80, and Husky Hawk.
--------x-157000-----------------------------
INT 15 - Tandy 1000SL/TL - READ FROM EEPROM
        AX = 7000h
        BL = number of word to read (00h-3Fh)
Return: CF clear if function supported
            DX = contents of EEPROM word
Note:   newer Tandy 1000-series machines use EEPROM instead of CMOS RAM in
          the clock chip to store system configuration information
SeeAlso: AX=7001h
--------x-157001-----------------------------
INT 15 - Tandy 1000SL/TL - WRITE TO EEPROM
        AX = 7001h
        BL = number of word to read (00h-3Fh)
        DX = new value for EEPROM word
Return: CF clear if function supported
Note:   the EEPROMs are normally written only by the system setup program;
          changing the values can badly mess up a Tandy
SeeAlso: AX=7000h
----------157002-----------------------------
INT 15 U - Tandy 1000 Model ??? - GET ROM PAGE
        AX = 7002h
Return: AL = ROM page mapped at 0E0000h (0-6 (13?))
Note:   some Tandy machines have DOS and DeskMate in a 512k paged ROM.  The
          BIOS uses this call to determine what ROM page is mapped in the 64k
          segment at 0E0000h.
        the 1000TL has 8 64k ROM pages; page 7 is permanently mapped at
          0F0000h.  There may be 16 32k ROM pages on other systems.
SeeAlso: AX=7003h,INT E0"DeskMate"
----------157003-----------------------------
INT 15 U - Tandy 1000 Model ??? - SET ROM PAGE
        AX = 7003h
        DL = ROM page to be mapped at 0E0000h (0-6 (13?))
Return: CF clear if valid ROM page specified
Note:   Some Tandy machines have DOS and DeskMate in a 512k paged ROM.  The
          BIOS uses this call to map ROM pages in the 64k segment at 0E0000h.
        The 1000TL has 8 64k ROM pages; page 7 is permanently mapped at
          0F0000h.  There may be 16 32k ROM pages on other systems.
SeeAlso: AX=7002h,INT E0"DeskMate"
--------b-1571------------------------------------
INT 15 - HUNTER 16 - SELECT POWER UP KEYS
        AH = 71h
        BL = column
        BH = row
        AL = column switch (00h disable, 01h enable)
        CL = row switch (00h disable, 01h enable)
Return: AH = status
SeeAlso: AH=7Bh,AH=88h
--------b-157200----------------------------------
INT 15 - HUNTER 16 - RESET SERIAL NUMBER
        AX = 7200h
Return: AH = 00h if successful
Desc:   reset the serial number to the default serial number present when the
          Hunter 16 was shipped
SeeAlso: AH=6Ch,AH=72h
--------b-1572------------------------------------
INT 15 - HUNTER 16 - REDIRECT SERIAL NUMBER
        AH = 72h
        AL nonzero
        DS:BX -> new serial number (6 ASCII digits)
Return: AH = 00h if successful
Desc:   install a new serial number
SeeAlso: AH=6Ch,AX=7200h
--------b-1573------------------------------------
INT 15 - HUNTER 16 - GET ORACLE GT POWER LEVEL
        AH = 73h
        AL = drive (0: A:, 1: B:)
Return: AH = status
            00h successful
            FFh Oracle GT drive not connected
        AL = power level in percent of maximum (0..100)
Desc:   get the power remaining in the Oracle GT batteries
SeeAlso: AH=61h
--------b-1574------------------------------------
INT 15 - HUNTER 16 - SET BACKLIGHT POWER UP STATE
        AH = 74h
        AL = new level
            01h off
            02h unchanged
            03h change level
                BL = desired level (00h-7Fh)
Return: AH = status
Desc:   select the backlight level to use when the Hunter is next turned on
SeeAlso: AH=64h,AH=75h,INT 10/AH=64h,INT 10/AH=78h
--------b-1575------------------------------------
INT 15 - HUNTER 16 - SET CONTRAST POWER UP STATE
        AH = 75h
        AL = new level
            01h off
            02h unchanged
            03h change level
                BL = desired level (00h-7Fh)
Return: AH = status
Desc:   select the LCD contrast level to use when the Hunter is next turned on
SeeAlso: AH=63h,AH=74h
--------b-1576------------------------------------
INT 15 - HUNTER 16 - CONTROL POWER SAVE
        AH = 76h
        BX = power save control (see #00495)
SeeAlso: AH=74h

Bitfields for HUNTER 16 power save control:
Bit(s)  Description     (Table 00495)
 0      power save enabled
 1      inhibit power save when waiting for COM1 data
 2      inhibit power save when waiting for COM2 data
 3      inhibit power save when waiting for data from barcode wand
 4      inhibit power up on timer tick
--------b-1579------------------------------------
INT 15 - HUNTER 16 - REDIRECT LPT1
        AH = 79h
        AL = port to which to redirect (00h COM1, 01h COM2)
--------b-157A------------------------------------
INT 15 - HUNTER 16 - INVOKE HOT KEY
        AH = 7Ah
Desc:   this function has the same effect as pressing the HOT key
SeeAlso: AH=7Bh
--------b-157B------------------------------------
INT 15 - HUNTER 16 - CONTROL HOT KEY
        AH = 7Bh
        AL = 00h prevent HOT key
            else allow HOT key
Desc:   Allow or prevent the HOT key function which is used to examine and
          change the Hunter setup
SeeAlso: AH=71h,AH=7Ah,AH=7Ch
--------b-157C------------------------------------
INT 15 - HUNTER 16 - CONTROL HOT KEY POWER OPTION
        AH = 7Ch
        AL = 00h prevent HOT key power option
            else allow HOT key power option
Desc:   allow or prevent changing the power options
SeeAlso: AH=7Bh,AH=7Dh
--------b-157D------------------------------------
INT 15 - HUNTER 16 - OVERRIDE LOW POWER TURN OFF
        AH = 7Dh
        AL = 00h turn off after 10 warnings
            else never turn off
Desc:   specify whether the Hunter 16 turns off after 10 low power warnings
SeeAlso: AH=7Ch
--------b-157E------------------------------------
INT 15 - HUNTER 16 - CONTROL BATTERY CHANGE FACILITIES (APM)
        AH = 7Eh
        AL = 00h do not prompt
            else prompt
Desc:   select whether the user is prompted for the battery state if the
          battery cap has been off when the system is turned on
SeeAlso: AH=7Fh
--------b-157F------------------------------------
INT 15 - HUNTER 16 - SET BATTERY TYPE (APM)
        AH = 7Fh
        AL = battery type
            00h  non-rechargeable
            else rechargeable
SeeAlso: AH=7Eh
--------B-1580-------------------------------
INT 15 C - OS HOOK - DEVICE OPEN (AT,XT286,PS)
        AH = 80h
        BX = device ID
        CX = process ID
        CF clear
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = status (see #00496)
Note:   this function should be hooked by a multitasker which wishes to keep
          track of device ownership; the default BIOS handler merely returns
          successfully
SeeAlso: AH=81h,AH=82h

(Table 00496)
Values for status:
 80h    invalid command (PC,PCjr)
 86h    function not supported (XT)
--------b-1580------------------------------------
INT 15 - HUNTER 16 - GET/SET BATTERY CAPACITY (APM)
        AH = 80h
        AL = function
            00h get
                Return: AL = capacity (500mA + AL * 50mA, max 40 = 2500mA)
            else set
                BL = battery capacity (same as AL above)
SeeAlso: AH=61h"HUNTER",AH=81h"HUNTER"
--------B-1581-------------------------------
INT 15 C - OS HOOK - DEVICE CLOSE
        AH = 81h
        BX = device ID
        CX = process ID
        CF clear
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = status (see #00496)
Note:   this function should be hooked by a multitasker which wishes to keep
          track of device ownership; the default BIOS handler merely returns
          successfully
SeeAlso: AH=80h,AH=82h
--------b-1581------------------------------------
INT 15 - HUNTER 16 - CONTROL POWER OUTPUT
        AH = 81h
        AL = new state of power output (00h off, nonzero on)
Desc:   turn the +5V low power output on or off
SeeAlso: AH=80h"HUNTER"
--------B-1582-------------------------------
INT 15 C - OS HOOK - PROGRAM TERMINATION
        AH = 82h
        BX = process ID
        CF clear
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = status (see #00496)
Notes:  closes all devices opened by the given process ID with function 80h
        this function should be hooked by a multitasker which wishes to keep
          track of device ownership; the default BIOS handler merely returns
          successfully
SeeAlso: AH=80h,AH=81h
--------b-1582------------------------------------
INT 15 - HUNTER 16 - SOUND OUTPUT
        AH = 82h
        DX = length (duration in seconds = DX * 666670 / frequency)
        BX = pitch (see #00497)
Desc:   Sound the tone specified in BX for the duration in DX
SeeAlso: AX=1019h

(Table 00497)
Values for HUNTER 16 sound pitch:
BX(dec)  Note   Frequency       BX(dec)  Note   Frequency
  425   G       1568.000         1515   A        440.000
  451   F#      1479.503         1605   G#       415.307
  477   F       1396.900         1701   G        392.000
  506   E       1318.500         1802   F#       369.998
  536   D#      1244.523         1909   F        349.230
  568   D       1174.700         2022   E        329.630
  601   C#      1108.749         2143   D#       311.127
  637   C       1046.500         2270   D        293.660
  675   B        958.770         2405   C#       277.183
  715   A#       932.329         2548   MID C    261.630
  758   A        880.000         2700   B        246.940
  803   G#       830.609         2860   A#       233.081
  850   G        783.990         3030   A        220.000
  901   F#       739.990         3210   G#       207.654
  954   F        698.460         3401   G        196.000
 1011   E        659.260         3604   F#       184.996
 1071   D#       622.257         3818   F        174.610
 1135   D        587.330         4045   E        164.810
 1203   C#       554.365         4286   D#       155.560
 1274   C        523.250         4540   D        146.830
 1350   B        493.880         4668   C#       142.827
 1430   A#       466.162         4803   C        138.810
--------B-1583-------------------------------
INT 15 - BIOS - SET EVENT WAIT INTERVAL (AT,PS50+)
        AH = 83h
        AL = subfunction
            00h set interval
                CX:DX = microseconds to delay
                ES:BX -> byte whose high bit is to be set at end of interval
            01h cancel wait interval
Return: CF set on error or function already busy
            AH = status
                80h invalid command (PC,PCjr)
                86h function not supported (XT and later)
        CF clear if successful
Notes:  the resolution of the wait period is 977 microseconds on many systems
          because many BIOSes use the 1/1024 second fast interrupt from the AT
          real-time clock chip which is available on INT 70
        IBM AT 1/10/84 BIOS ignores AL and always performs subfunction 00h
SeeAlso: AH=41h,AH=86h,INT 70,MEM 0040h:0098h,MEM 0040h:009Ch
--------b-1583------------------------------------
INT 15 - HUNTER 16 - CONTROL SCREEN SYNCHRONISATION
        AH = 83h
        AL = state of LCD window (00h disabled, nonzero enabled)
Desc:   Enable/disable the facility where the displayed window tracks the
          cursor output to keep the focus visible
--------B-1584-------------------------------
INT 15 - BIOS - JOYSTICK SUPPORT (XT after 11/8/82,AT,XT286,PS)
        AH = 84h
        DX = subfunction
            0000h read joystick switches
                Return: AL bits 7-4 = switch settings
            0001h read positions of joysticks
                Return: AX = X position of joystick A
                        BX = Y position of joystick A
                        CX = X position of joystick B
                        DX = Y position of joystick B
Return: CF set on error
            AH = status (see #00496)
        CF clear if successful
Notes:  if no game port is installed, subfunction 0000h returns AL=00h (all
          switches open) and subfunction 0001h returns AX=BX=CX=DX=0000h
        a 250kOhm joystick typically returns 0000h-01A0h
SeeAlso: AH=84h"V20-XT-BIOS"
--------b-1584-------------------------------
INT 15 - V20-XT-BIOS - JOYSTICK SUPPORT
        AH = 84h
        DX = subfunction
            0000h read joystick switches
                Return: AL bits 7-4 = switch settings
            other: read positions of joysticks as indicated by bits 0-3
                Return: AX = X position of joystick A (if DX bit 0 set)
                        BX = Y position of joystick A (if DX bit 1 set)
                        CX = X position of joystick B (if DX bit 2 set)
                        DX = Y position of joystick B (if DX bit 3 set)
Return: CF set on error
            AH = status (see #00496)
        CF clear if successful
Program: V20-XT-BIOS is a ROM BIOS replacement with extensions by Peter
           Koehlmann / c't magazine
SeeAlso: AH=84h"PS",INT 10/AH=0Eh/CX=ABCDh
--------b-158400----------------------------------
INT 15 - HUNTER 16 - GET DISKETTE PORT
        AX = 8400h
        BH = Drive (0: A:, 1: B:)
Return: AL = Port (0: COM1, >0: COM2)
Desc:   return the COM port used for the floppy drive
SeeAlso: AX=8401h
--------b-158401----------------------------------
INT 15 - HUNTER 16 - SET DISKETTE PORT
        AX = 8401h
        BH = Drive (0: A:, 1: B:)
        BL = Port (0: COM1, >0: COM2)
Desc:   set the COM port used for the floppy drive
SeeAlso: AX=8400h
--------B-1585-------------------------------
INT 15 C - OS HOOK - SysReq KEY ACTIVITY (AT,PS)
        AH = 85h
        AL = SysReq key action (00h pressed, 01h released)
        CF clear
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = status (see #00496)
Notes:  called by keyboard decode routine
        the default handler simply returns successfully; programs which wish
          to monitor the SysReq key must hook this call
        the SysReq key is often labeled SysRq
SeeAlso: INT 09
--------b-158500----------------------------------
INT 15 - HUNTER 16 - RESTORE POWER MENU (APM)
        AX = 8500h
Desc:   restore the standard power menu
SeeAlso: AX=8501h"HUNTER"
--------b-158501----------------------------------
INT 15 - HUNTER 16 - SET POWER MENU (APM)
        AX = 8501h
        BL = user software interrupt number
Desc:   install an alternate power menu routine
SeeAlso: AX=8500h"HUNTER"
--------B-1586-------------------------------
INT 15 - BIOS - WAIT (AT,PS)
        AH = 86h
        CX:DX = interval in microseconds
Return: CF clear if successful (wait interval elapsed)
        CF set on error or AH=83h wait already in progress
            AH = status (see #00496)
Note:   the resolution of the wait period is 977 microseconds on many systems
          because many BIOSes use the 1/1024 second fast interrupt from the AT
          real-time clock chip which is available on INT 70; because newer
          BIOSes may have much more precise timers available, it is not
          possible to use this function accurately for very short delays unless
          the precise behavior of the BIOS is known (or found through testing)
SeeAlso: AH=41h,AH=83h,INT 1A/AX=FF01h,INT 70
--------b-1586------------------------------------
INT 15 - HUNTER 16 - GET/SET SCREEN ATTRIBUTE TABLE
        AH = 86h
        AL = function (00h get, nonzero set)
        BX = 1234h
        DS:SI -> 256-byte Attribute buffer
Note:   In text modes each character has its attribute byte XOR'd with the
          corresponding byte in the attribute table.  If the attribute is 15,
          15 is XOR'd with Table[15]
--------B-1587-------------------------------
INT 15 - SYSTEM - COPY EXTENDED MEMORY
        AH = 87h
        CX = number of words to copy (max 8000h)
        ES:SI -> global descriptor table (see #00499)
Return: CF set on error
        CF clear if successful
        AH = status (see #00498)
Notes:  copy is done in protected mode with interrupts disabled by the default
          BIOS handler; many 386 memory managers perform the copy with
          interrupts enabled
        this function is incompatible with the OS/2 compatibility box
SeeAlso: AH=88h,AH=89h,INT 1F/AH=90h

(Table 00498)
Values for extended-memory copy status:
 00h    source copied into destination
 01h    parity error
 02h    interrupt error
 03h    address line 20 gating failed
 80h    invalid command (PC,PCjr)
 86h    unsupported function (XT,PS30)

Format of global descriptor table:
Offset  Size    Description     (Table 00499)
 00h 16 BYTEs   zeros (used by BIOS)
 10h    WORD    source segment length in bytes (2*CX-1 or greater)
 12h  3 BYTEs   24-bit linear source address, low byte first
 15h    BYTE    source segment access rights (93h)
 16h    WORD    (286) zero
                (386+) extended access rights and high byte of source address
 18h    WORD    destination segment length in bytes (2*CX-1 or greater)
 1Ah  3 BYTEs   24-bit linear destination address, low byte first
 1Dh    BYTE    destination segment access rights (93h)
 1Eh    WORD    (286) zero
                (386+) extended access rights and high byte of destin. address
 20h 16 BYTEs   zeros (used by BIOS to build CS and SS descriptors)
--------b-1587------------------------------------
INT 15 - HUNTER 16 - SET INT 72h VECTOR
        AH = 87h
        DS:DX = new service routine
Desc:   set the INT 72h vector which is called in 2 cases:
          - when the machine is about to turn off or reboot, INT 72h is called
            with AH=0
          - when the machine is powering up INT 72h is called with AH=01h
Note:   the actual INT 72h vector must also be changed with INT 21/AH=25h
--------B-1588-------------------------------
INT 15 - SYSTEM - GET EXTENDED MEMORY SIZE (286+)
        AH = 88h
Return: CF clear if successful
            AX = number of contiguous KB starting at absolute address 100000h
        CF set on error
            AH = status
                80h invalid command (PC,PCjr)
                86h unsupported function (XT,PS30)
Notes:  TSRs which wish to allocate extended memory to themselves often hook
          this call, and return a reduced memory size.  They are then free to
          use the memory between the new and old sizes at will.
        the standard BIOS only returns memory between 1MB and 16MB; use AH=C7h
          for memory beyond 16MB
        not all BIOSes correctly return the carry flag, making this call
          unreliable unless one first checks whether it is supported through
          a mechanism other than calling the function and testing CF
SeeAlso: AH=87h,AH=8Ah"Phoenix",AH=C7h,AX=DA88h,AX=E801h,AX=E820h
--------b-1588------------------------------------
INT 15 - HUNTER 16 - GET POWER UP KEYS
        AH = 88h
Return: AH = 00h
        BX = column
        CL = row
SeeAlso: AH=71h
--------B-1589-------------------------------
INT 15 - SYSTEM - SWITCH TO PROTECTED MODE
        AH = 89h
        BL = interrupt number of IRQ0 (IRQ1-7 use next 7 interrupts)
        BH = interrupt number of IRQ8 (IRQ9-F use next 7 interrupts)
        ES:SI -> GDT for protected mode (see #00500)
Return: CF set on error
           AH = FFh  error enabling address line 20
        CF clear if successful
           AH = 00h
           in protected mode at specified address
           BP may be destroyed; all segment registers change
Notes:  BL and BH must be multiples of 8
        the protected-mode CS must reference the same memory as the CS this
          function is called from because execution continues with the address
          following the interrupt call
SeeAlso: AH=87h,AH=88h,INT 67/AX=DE0Ch

Format of BIOS switch-to-protected-mode Global Descriptor Table:
Offset  Size    Description     (Table 00500)
 00h  8 BYTEs   null descriptor (initialize to zeros)
 08h  8 BYTEs   GDT descriptor (see #00501)
 10h  8 BYTEs   IDT descriptor
 18h  8 BYTEs   DS descriptor
 20h  8 BYTEs   ES
 28h  8 BYTEs   SS
 30h  8 BYTEs   CS
 38h  8 BYTEs   uninitialized, used to build descriptor for BIOS CS

Format of segment descriptor table entry:
Offset  Size    Description     (Table 00501)
 00h    WORD    segment limit, low word
 02h  3 BYTEs   segment base address, low 24 bits
 05h    BYTE    access mode (see #00502)
 06h    BYTE    386+ extended access mode (see #00505)
 07h    BYTE    386+ segment base address, high 8 bits
SeeAlso: #00500,INT 2C/AX=0002h,INT 31/AX=0009h

Bitfields for segment descriptor table access mode field:
Bit(s)  Description     (Table 00502)
 3-0    segment type (see #00503,#00504)
 4      descriptor type (1 = application, 0 = system)
 6-5    descriptor privilege level
 7      segment is present in RAM
SeeAlso: #00501,#00505

(Table 00503)
Values for system segment descriptor type:
 0      reserved
 1      available 16-bit TSS
 2      LDT
 3      busy 16-bit TSS
 4      16-bit call gate
 5      task gate
 6      16-bit interrupt gate
 7      16-bit trap gate
 8      reserved
 9      available 32-bit TSS
 10     reserved
 11     busy 32-bit TSS
 12     32-bit call gate
 13     reserved
 14     32-bit interrupt gate
 15     32-bit trap gate
SeeAlso: #00502,#00504

Bitfields for application segment descriptor type:
Bit(s)  Description     (Table 00504)
 3      code/data
        0 date
        1 code
---data segments---
 2      expand down
 1      writeable
---code segments---
 2      conforming
 1      readable
------
 0      accessed
SeeAlso: #00502,#00503

Bitfields for 386+ segment descriptor table extended access mode field:
Bit(s)  Description     (Table 00505)
 3-0    high 4 bits of segment limit
 4      available
 5      reserved (0)
 6      default operation size (1 = 32 bits, 0 = 16 bits)
 7      granularity (1 = 4K, 0 = byte)
SeeAlso: #00501,#00502,#02557
--------b-158900----------------------------------
INT 15 - HUNTER 16 - GET POWER MODE
        AX = 8900h
Return: AH = 00h
        BL = current power mode
            00h Standard Power Mode (SPM)
            01h Advanced Power Mode (APM)
SeeAlso: AX=8901h
--------b-158901----------------------------------
INT 15 - HUNTER 16 - SET POWER MODE
        AX = 8901h
        BL = new mode
            00h Standard Power Mode (SPM)
            01h Advanced Power Mode (APM)
Return: AH = 00h
SeeAlso: AX=8900h
--------b-158A------------------------------------
INT 15 - HUNTER 16 - CONTROL POWER INPUT (SPM)
        AH = 8Ah
        AL = new state of Power Input (00h disabled, nonzero enabled)
        SI = 1234h
        DI = 5678h
Return: AH = status
            00h success
            FFh failure
Desc:   Enable or disable Power Input. When Power Input is disabled the AC
          adapter will neither charge the batteries nor supply power to the
          Hunter 16. Disable Power Input if using Alkaline batteries.
--------b-158A-------------------------------
INT 15 - Phoenix BIOS v4.0 - GET BIG MEMORY SIZE
        AH = 8Ah
Return: DX:AX = extended memory size in K
SeeAlso: AH=88h,AX=E801h,AX=E820h
--------b-158B------------------------------------
INT 15 - HUNTER 16 - GET/SET CHARGER TEMPERATURE OVERRIDE
        AH = 8Bh
        AL = function
            00h get
                Return: BH = Maximum charging temperature
                                Temp = -20 + (n * 0.63) degrees Centigrade
                        BL = Minimum charging temperature
            else set
                BH = maximum charging temperature (as above)
                BL = minimum charging temperature (as above)
Return: AH = status
            00h success
            FFh failure
Desc:   get/set the temperature interval within which the charger should
          operate
--------b-158C------------------------------------
INT 15 - HUNTER 16 - GET/SET POWER SAVE ENTRY FLAG
        AH = 8Ch
        AL = function
            00h get
                Return: BX = which operations disable power save (see #00506)
            else set
                BX = which operations should disable power save (see #00506)
SeeAlso: AH=8Dh

Bitfields for HUNTER 16 operations disabling power save:
Bit(s)  Description     (Table 00506)
 0      INT 10h prevents power save
 1      INT 13h prevents power save
 2      INT 14h prevents power save
 3      INT 15h prevents power save
 4      INT 1Ah prevents power save
 5      INT 21h prevents power save
 6      direct write to video RAM prevents power save
 7      access to 8250 UART prevents power save
 8      access to 8253 (Sound) prevents power save
--------b-158D------------------------------------
INT 15 - HUNTER 16 - GET/SET BOOST CHARGE (SPM)
        AH = 8Dh
        AL = function
            00h get
                Return: AL = Fast Charge state (00h prevented, else allowed)
            nonzero set
                BH = Fast Charge state (00h prevent, nonzero allow)
Return: AH = status
            00h success
            FFh failure
Desc:   control whether Fast Charging (200ma rather than 70ma) is allowed
SeeAlso: AH=8Ch
--------B-1590-------------------------------
INT 15 - OS HOOK - DEVICE BUSY (AT,PS)
        AH = 90h
        AL = device type (see #00507)
        ES:BX -> request block for type codes 80h through BFh
        CF clear
Return: CF set if wait time satisfied
        CF clear if driver must perform wait
            AH = 00h
Notes:  type codes are allocated as follows:
          00-7F non-reentrant devices; OS must arbitrate access
          80-BF reentrant devices; ES:BX points to a unique control block
          C0-FF wait-only calls, no complementary INT 15/AH=91h call
        floppy and hard disk BIOS code uses this call to implement a timeout;
          for device types 00h and 01h, a return of CF set means that the
          timeout expired before the disk responded.
        this function should be hooked by a multitasker to allow other tasks
          to execute while the BIOS is waiting for I/O completion; the default
          handler merely returns with AH=00h and CF clear
SeeAlso: AH=91h,INT 13/AH=00h,INT 17/AH=00h,INT 1A/AH=83h

(Table 00507)
Values for device type:
 00h    disk
 01h    diskette
 02h    keyboard
 03h    PS/2 pointing device
 21h    waiting for keyboard input (Phoenix BIOS)
 80h    network
 FBh    digital sound (Tandy)
 FCh    disk reset (PS)
 FDh    diskette motor start
 FEh    printer
--------B-1591-------------------------------
INT 15 - OS HOOK - DEVICE POST (AT,PS)
        AH = 91h
        AL = device type (see #00507)
        ES:BX -> request block for type codes 80h through BFh
        CF clear
Return: AH = 00h
Note:   this function should be hooked by a multitasker to allow other tasks
          to execute while the BIOS is waiting for I/O completion; the default
          handler merely returns with AH=00h and CF clear
SeeAlso: AH=90h
--------B-1592-------------------------------
INT 15 - IBM SurePath BIOS - Officially "Private" Function
        AH = 92h
SeeAlso: AH=07h"IBM",AH=3Eh"IBM"
--------B-15A0-------------------------------
INT 15 - IBM SurePath BIOS - ACCESS LOADABLE-ABIOS SIGNATURE
        AH = A0h
        AL = function
            00h get loadable-ABIOS signature
                Return: BL = signature value
                            00h loadable-ABIOS prompting not required
                            A1h loadable-ABIOS prompting is required
            01h write loadable-ABIOS signature
                BL = new signature value
                    00h loadable-ABIOS prompting not required
                    A1h loadable-ABIOS prompting is required
Return: CF clear if successful
        CF set on error
        AH = status
            00h successful
            01h invalid subfunction
            02h unable to read/write signature
            86h function not supported
Note:   IBM classifies this function as optional
SeeAlso: AH=08h"IBM"
--------x-15A100-----------------------------
INT 15 U - AMI PCI BIOS - SET ??? FLAG
        AX = A100h
Return: AX = 0000h
        CF clear
        BX,CX,DI may be destroyed
Desc:   sets bit 7 of CMOS RAM location 37h and updates the CMOS checksum in
          locations 3Eh and 3Fh
Notes:  in the examined version of the BIOS, nonzero values in AL cause it to
          drop through to checking the next possible value of AH, i.e. only
          subfunction 00h is supported
        also supported by Dell XPS P90 and IBM PS/PV 6384, which also use
          AMI BIOSes
--------B-15AB-------------------------------
INT 15 - IBM SurePath BIOS - Officially "Private" Function
        AH = ABh
SeeAlso: AH=07h"IBM",AH=3Eh"IBM"
----------15B001CX5354-----------------------
INT 15 - Stac ??? - INSTALLATION CHECK
        AX = B001h
        CX = 5354h ('ST')
        DX = 4143h ('AC')
Return: AX = 4F4Bh ('OK') if installed
Note:   this function is called by Novell DOS 7 NWCACHE v1.01
--------n-15BA10-----------------------------
INT 15 - HP OmniShare - Pen Driver - REPORT PEN CONTROL AREA EVENT
        AX = BA10h
        BL = event
           00h the pen left control areas
           01h the pen entered the Brightness- area
           02h the pen entered the Brightness+ area
           03h the pen entered the Contrast- area
           04h the pen entered the Contrast+ area
Return: CF clear if successfully processed
        CF set on error (function not supported, ie. not an OmniShare BIOS)
Note:   The pen driver is responsible for detecting when the pen enters and
          leaves control areas of the OmniShare tablet, and notifying the BIOS.
        The BIOS manages the events, including the autorepetition, and sets
          the status LEDs.
SeeAlso: AX=BA20h,AX=BA13h
--------n-15BA11-----------------------------
INT 15 - HP OmniShare - Pen Driver - SET THE COMMUNICATION LED STATE
        AX = BA11h
        BL = new LED state (00h steady, 01h flashing)
Return: CF clear if successful
        CF set on error
Note:   this function is for use by communication software to give visual
          feedback of active communications even if the display is in standby
          mode.
SeeAlso: AX=BA10h,AX=BA24h
--------n-15BA12-----------------------------
INT 15 - HP OmniShare - Pen Driver - STORE PEN BATTERY CHARGE
        AX = BA12h
        BL = new battery state (00h good, 01h low charge)
Return: CF set on error
        CF clear if successfully stored in CMOS
Note:   The last report will be displayed by the Power-On Self Test the next
          time the OmniShare boots.  This allows something meaningful to be
          reported even if the pen is not detected during the POST.
SeeAlso: AX=BA13h
--------n-15BA13-----------------------------
INT 15 - HP OmniShare - Pen Driver - GET PEN BATTERY CHARGE
        AX = BA13h
Return: CF clear if successful
            BL = pen battery state (00h good, 01h low charge)
        CF set on error
Note:   returns the last value set by AX=BA12h.
SeeAlso: AX=BA12h
--------p-15BA20-----------------------------
INT 15 - HP OmniShare - STANDBY.COM - INSTALLATION CHECK
        AX = BA20h
Return: CF clear if successful (installed)
        CF set on error (not installed)
Notes:  The display controller can enter a standby mode after a given timeout,
          to conserve power or (for the OmniShare) to increase the life of
          the backlight.
        A side effect of standby mode is that the communications LED turns on
          automatically when the display is in standby mode.  This is done in
          hardware, and is intended to show that the unit is still on.
SeeAlso: AX=BA10h,AX=BA20h,AX=BA22h,AX=BA24h,AX=BA26h
--------p-15BA21-----------------------------
INT 15 - HP OmniShare - STANDBY.COM - SET STANDBY DURATION
        AX = BA21h
        BL = new timeout before standby mode in minutes (01h-0Fh)
            00h to disable automatic switch to standby mode
Return: CF clear if successful
        CF set on error (function not supported)
Note:   The actual timeout with a GD6205 controller is ((N*64)-32) seconds,
          instead of (N*60) seconds as documented.
SeeAlso: AX=BA20h,AX=BA22h
--------p-15BA22-----------------------------
INT 15 - HP OmniShare - STANDBY.COM - GET STANDBY DURATION
        AX = BA22h
Return: CF clear if successful
           BL = standy duration in minutes (01h-0Fh), or 00h if disabled
        CF set on error (function not supported)
Note:   The actual timeout with a GD6205 controller is ((N*64)-32) seconds,
          instead of (N*60) seconds as documented.
SeeAlso: AX=BA20h,AX=BA21h
--------p-15BA23-----------------------------
INT 15 - HP OmniShare - STANDBY.COM - TURN ON THE SCREEN IMMEDIATELY
        AX = BA23h
Return: CF clear if successful
        CF set on error
SeeAlso: AX=BA11h,AX=BA20h,AX=BA24h
--------p-15BA24-----------------------------
INT 15 - HP OmniShare - STANDBY.COM - TURN OFF THE SCREEN IMMEDIATELY
        AX = BA24h
Return: CF clear if successful
        CF set on error
Note:   This function is not implemented yet. Reserved for future versions
          of the OmniShare.
SeeAlso: AX=BA11h,AX=BA20h,AX=BA23h
--------p-15BA25-----------------------------
INT 15 - HP OmniShare - STANDBY.COM - PREPARE FOR UNINSTALL
        AX = BA25h
Return: CF clear if successful
            AX = 25BAh
            BX = PSP of STANDBY.COM resident portion
            DX:CX -> previous INT 15 handler
        CF set on error
Note:   This function is used internally by the STANDBY.COM /u option, and
          should not be used by application programs.
SeeAlso: AX=BA20h
--------p-15BA26-----------------------------
INT 15 - HP OmniShare - STANDBY.COM - IS THE DISPLAY IN STANDBY MODE?
        AX = BA26h
Return: CF clear if successful
            AL  = display state (00h active, 01h in standby mode)
        CF set on error (function not supported)
SeeAlso: AX=BA20h,AX=BA23h
--------p-15BA27-----------------------------
INT 15 - HP OmniShare - STANDBY.COM - RESERVED FUNCTIONS
        AX = BA27h to BA2Fh
Desc:   reserved for future use
--------b-15BC-------------------------------
INT 15 - Phoenix 386 BIOS - DETERMINE CPU SPEED FOR DELAY LOOPS
        AH = BCh
Return: CF clear
        (Phoenix 1.10 10a) BYTE 0040h:00B0h set to delay loop count
        (Dell 4xxDE BIOS A11) WORD 0040h:00ECh set to delay loop count
Note:   this function reads system timer channel 0 twice, then does
          calculations on the returned values to determine the delay loop
          counter needed by the BIOS for beeps and floppy timeouts
SeeAlso: AX=2305h,MEM 0040h:00B0h
--------E-15BF00-----------------------------
INT 15 - Rational Systems DOS/16M - ???
        AX = BF00h
        ???
Return: ???
Note:   under DESQview/X 1.02 DVDOS4GX.DVR, this call is identical to AX=BF02h
SeeAlso: AX=BF02h
--------E-15BF01-----------------------------
INT 15 - Rational Systems DOS/16M - ???
        AX = BF01h
        ???
Return: ???
Notes:  under DESQview/X 1.02 DVDOS4GX.DVR, this call is identical to AX=BF02h
        called by DOS/4GW
SeeAlso: AX=BF00h,AX=BF02h
--------E-15BF02DX0000-----------------------
INT 15 - Rational Systems DOS/16M - INSTALLATION CHECK
        AX = BF02h
        DX = 0000h
Return: DX = nonzero if installed
            DX:SI -> XBRK structure (see #00508)
Note:   this function is also supported by DOS/4G
SeeAlso: AX=BF01h,AX=BFDCh,AX=BFDEh/BX=0000h
SeeAlso: INT 21/AH=FFh/DH=0Eh,INT 2F/AH=A1h,INT 2F/AX=F100h,INT 2F/AX=FBA1h

Format of DOS/16M XBRK structure:
Offset  Size    Description     (Table 00508)
 00h    DWORD   linear address of first available byte
 04h    DWORD   linear address of last available byte + 1 ???
 08h    DWORD   real-mode address of XBRK structure???
 0Ch    DWORD   ???
 10h  2 BYTEs   ???
 12h    WORD    segment of ???
 14h  8 BYTEs   ???
 1Ch 512 BYTEs  protected-mode IDT
21Ch  N BYTEs   protected-mode GDT
--------E-15BF03-----------------------------
INT 15 - Rational Systems DOS/4GW - UNINSTALL???
        AX = BF03h
        BX = PSP segment of extender
        ???
Return: ???
Note:   if BX is not the PSP segment of the extender, it passes the call down
          the INT 15 chain; this allows nested instances of the extender
SeeAlso: AX=BF06h
--------E-15BF04-----------------------------
INT 15 - Rational Systems DOS/4GW - ???
        AX = BF04h
        BX = PSP segment of extender
Return: nothing???
Notes:  if BX is not the PSP segment of the extender, it passes the call down
          the INT 15 chain; this allows nested instances of the extender
        grabs INT 2Fh and installs handlers for INT 2F/AX=1605h-1607h
SeeAlso: INT 2F/AX=1607h/BX=22C0h
--------E-15BF05-----------------------------
INT 15 - Rational Systems DOS/4GW - INITIALIZE PROTECTED-MODE INTERFACE
        AX = BF05h
        BX = PSP segment of extender
Return: nothing???
Notes:  if BX is not the PSP segment of the extender, it passes the call down
          the INT 15 chain; this allows nested instances of the extender
        calls INT 67/AX=DE01h if ???
--------E-15BF06-----------------------------
INT 15 - Rational Systems DOS/4GW - ???
        AX = BF06h
        BX = PSP segment of extender
        ???
Return: ???
Note:   if BX is not the PSP segment of the extender, it passes the call down
          the INT 15 chain; this allows nested instances of the extender
SeeAlso: AX=BF03h
--------E-15BFDCDX0000-----------------------
INT 15 - Rational Systems DOS/4GW - INSTALLATION CHECK
        AX = BFDCh
        DX = 0000h
        SI = 0000h
Return: DX = nonzero if installed
            DX:SI -> XBRK structure (see #00508)
SeeAlso: AX=BF02h
--------E-15BFDEBX0000-----------------------
INT 15 - DESQview/X - DVDOS4GX.DVR - INSTALLATION CHECK
        AX = BFDEh
        BX = 0000h
Return: AX = ??? (0003h)
        BX = FFFFh
SeeAlso: AX=BF02h
--------E-15BFDEBX0001-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET PROCESS MANAGER NAME
        AX = BFDEh
        BX = 0001h
Return: BX = 0000h (success)
        CX:DX -> name of process manager executable
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX0002-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - SET ???
        AX = BFDEh
        BX = 0002h
        CX:DX -> ???
Return: BX = 0000h (success)
SeeAlso: AX=BFDEh/BX=0000h,AX=BFDEh/BX=0003h
--------E-15BFDEBX0003-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET ???
        AX = BFDEh
        BX = 0003h
Return: BX = 0000h (success)
        CX:DX -> ???
SeeAlso: AX=BFDEh/BX=0000h,AX=BFDEh/BX=0002h
--------E-15BFDEBX0004-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - ???
        AX = BFDEh
        BX = 0004h
        CL = ???
Return: BX = 0000h (success)
        CX:DX -> XBRK structure (see #00508)
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX0005-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - ???
        AX = BFDEh
        BX = 0005h
        CX = new value for ???
Return: BX = 0000h (success)
        AX = old value of ???
        DS:SI -> ??? (if AX nonzero on return)
        ES:DI -> ??? (if AX zero on return)
Note:   called by DOS4GW.EXE
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX0006-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET ???
        AX = BFDEh
        BX = 0006h
Return: BX = 0000h (success)
        AH = interrupt number??? (BEh)
        CX:DX = ???
SeeAlso: AX=BFDEh/BX=0000h,AX=BFDEh/BX=0007h,INT BE"DESQview"
--------E-15BFDEBX0007-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - SET ???
        AX = BFDEh
        BX = 0007h
        CX:DX = ???
Return: BX = 0000h (success)
SeeAlso: AX=BFDEh/BX=0000h,AX=BFDEh/BX=0006h
--------E-15BFDEBX0008-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - ???
        AX = BFDEh
        BX = 0008h
        CX = segment of ???
        DS = ???
Return: BX = status
            0000h successful
                AL = ??? (80h or C0h)
                DX = ??? (0603h) if AL=C0h
            0001h failed
                AX = 0000h
Note:   called by DOS4GW.EXE
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX0009-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET PROTECTED MODE PROGRAM LOADER
        AX = BFDEh
        BX = 0009h
Return: BX = 0000h (success)
        CX:DX -> full pathname to LOAD32.EXP
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX000A-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - DECREMENT ???
        AX = BFDEh
        BX = 000Ah
Return: BX = 0000h (success)
        AX = new value of ??? counter
Notes:  also resets a variety of values if the counter goes negative
        called by DOS4GW.EXE
SeeAlso: AX=BFDEh/BX=0000h,AX=BFDEh/BX=000Bh
--------E-15BFDEBX000B-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - INCREMENT ???
        AX = BFDEh
        BX = 000Bh
Return: AX = new value of ??? counter
Note:   called by DOS4GW.EXE
SeeAlso: AX=BFDEh/BX=0000h,AX=BFDEh/BX=000Ah
--------E-15BFDEBX000C-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - ???
        AX = BFDEh
        BX = 000Ch
        CL = ???
            00h
            nonzero
Return: ???
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX000D-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - ???
        AX = BFDEh
        BX = 000Dh
        ???
Return: ???
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX000E-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - ???
        AX = BFDEh
        BX = 000Eh
        DX:CX -> ???
Return: AX = segment of handle for calling task
        BX = ??? (probably destroyed)
        DX:CX -> ???
SeeAlso: AX=BFDEh/BX=0000h,AX=BFDEh/BX=000Fh,AX=BFDEh/BX=0013h
--------E-15BFDEBX000F-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - ???
        AX = BFDEh
        BX = 000Fh
Return: AX = segment of handle for calling task
        BX = ??? (probably destroyed)
        DX:CX -> ???
Note:   identical to AX=BFDEh/BX=000Eh with CX:DX = 0000h:0000h
SeeAlso: AX=BFDEh/BX=000Eh,AX=BFDEh/BX=0010h
--------E-15BFDEBX0010-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET TASK HANDLE
        AX = BFDEh
        BX = 0010h
Return: AX = segment of caller's task handle
        BX destroyed
SeeAlso: AX=BFDEh/BX=000Fh
--------E-15BFDEBX0011-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET ???
        AX = BFDEh
        BX = 0011h
Return: CX = code segment of DVDOS4GX.DVR
        BX = ??? (0004h)
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX0012-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET ???
        AX = BFDEh
        BX = 0012h
Return: DX = code segment of DVDOS4GX.DVR
        BX = ??? (012Ch)
        CX = ??? (0006h)
SeeAlso: AX=BFDEh/BX=0000h
--------E-15BFDEBX0013-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET ???
        AX = BFDEh
        BX = 0013h
Return: DX:CX -> ???
SeeAlso: AX=BFDEh/BX=000Eh
--------E-15BFDEBX0014-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - LOCK ??? MAILBOX
        AX = BFDEh
        BX = 0014h
        CX = index of ??? mailbox
                (0000h-0004h valid, but no range checking done)
Return: AX,BX destroyed
SeeAlso: AX=BFDEh/BX=0015h,AX=BFDEh/BX=0017h
--------E-15BFDEBX0015-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - UNLOCK ??? MAILBOX
        AX = BFDEh
        BX = 0015h
        CX = index of ??? mailbox
                (0000h-0004h valid, but no range checking done)
Return: AX,BX destroyed
SeeAlso: AX=BFDEh/BX=0014h,AX=BFDEh/BX=0016h
--------E-15BFDEBX0016-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - CHECK IF ??? MAILBOX OWNED
        AX = BFDEh
        BX = 0016h
        CX = index of ??? mailbox
                (0000h-0004h valid, but no range checking done)
Return: AX = status
            0000h no one owns mailbox
            0001h mailbox has an owner
        BX destroyed
SeeAlso: AX=BFDEh/BX=0015h,AX=BFDEh/BX=0017h
--------E-15BFDEBX0017-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET ??? MAILBOX OWNER
        AX = BFDEh
        BX = 0017h
        CX = index of ??? mailbox
                (0000h-0004h valid, but no range checking done)
Return: AX = segment of mailbox owner's handle
        BX = segment of caller's task handle
SeeAlso: AX=BFDEh/BX=0015h,AX=BFDEh/BX=0016h
--------E-15BFDEBXFFFD-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - GET ???
        AX = BFDEh
        BX = FFFDh
Return: CX:DX = ???
SeeAlso: AX=BFDEh/BX=FFFEh
--------E-15BFDEBXFFFE-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - SET ???
        AX = BFDEh
        BX = FFFEh
        CX:DX = ???
SeeAlso: AX=BFDEh/BX=FFFDh
--------E-15BFDEBXFFFF-----------------------
INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - NOP
        AX = BFDEh
        BX = FFFFh
SeeAlso: AX=BFDEh/BX=0000h
--------B-15C0-------------------------------
INT 15 - SYSTEM - GET CONFIGURATION (XT after 1/10/86,AT mdl 3x9,CONV,XT286,PS)
        AH = C0h
Return: CF set if BIOS doesn't support call
        CF clear on success
            ES:BX -> ROM table (see #00509)
        AH = status
            00h successful
            86h unsupported function
Notes:  the 1/10/86 XT BIOS returns an incorrect value for the feature byte
        the configuration table is at F000h:E6F5h in 100% compatible BIOSes
        Dell machines contain the signature "DELL" or "Dell" at absolute FE076h
          and a model byte at absolute address FE845h (see #00516)
        Hewlett-Packard machines contain the signature "HP" at F000h:00F8h and
          a product identifier at F000h:00FAh (see #00519)
        Compaq machines can be identified by the signature string "COMPAQ" at
          F000h:FFEAh, and is preceded by additional information (see #00517)
        Tandy 1000 machines contain 21h in the byte at F000h:C000h and FFh in
          the byte at FFFFh:000Eh; Tandy 1000SL/TL machines only provide the
          first three data bytes (model/submodel/revision) in the returned
          table
        Toshiba laptops contain the signature "TOSHIBA" at FE010h as part of
          a laptop information record at F000h:E000h (see #00520)
        some AST machines contain the string "COPYRIGHT AST RESEARCH" one byte
          past the end of the configuration table
        the Phoenix 386 BIOS contains a second version and date string
          (presumably the last modification for that OEM version) beginning at
          F000h:FFD8h, with each byte doubled (so that both ROM chips contain
          the complete information)
SeeAlso: AH=C7h,AH=C9h,AX=D100h,AX=D103h

Format of ROM configuration table:
Offset  Size    Description     (Table 00509)
 00h    WORD    number of bytes following
 02h    BYTE    model (see #00515)
 03h    BYTE    submodel (see #00515)
 04h    BYTE    BIOS revision: 0 for first release, 1 for 2nd, etc.
 05h    BYTE    feature byte 1 (see #00510)
 06h    BYTE    feature byte 2 (see #00511)
 07h    BYTE    feature byte 3 (see #00512)
 08h    BYTE    feature byte 4 (see #00513)
 09h    BYTE    feature byte 5 (see #00514)
                ??? (08h) (Phoenix 386 v1.10)
                ??? (0Fh) (Phoenix 486 v1.03 PCI)
---AWARD BIOS---
 0Ah  N BYTEs   AWARD copyright notice
---Phoenix BIOS---
 0Ah    BYTE    ??? (00h)
 0Bh    BYTE    major version
 0Ch    BYTE    minor version (BCD)
 0Dh  4 BYTEs   ASCIZ string "PTL" (Phoenix Technologies Ltd)
---Quadram Quad386---
 0Ah 17 BYTEs   ASCII signature string "Quadram Quad386XT"

Bitfields for feature byte 1:
Bit(s)  Description     (Table 00510)
 7      DMA channel 3 used by hard disk BIOS
 6      2nd 8259 installed
 5      Real-Time Clock installed
 4      INT 15/AH=4Fh called upon INT 09h
 3      wait for external event (INT 15/AH=41h) supported
 2      extended BIOS area allocated (usually at top of RAM)
 1      bus is Micro Channel instead of ISA
 0      system has dual bus (Micro Channel + ISA)
SeeAlso: #00509,#00511

Bitfields for feature byte 2:
Bit(s)  Description     (Table 00511)
 7      32-bit DMA supported
 6      INT 16/AH=09h (keyboard functionality) supported (see #00585)
 5      INT 15/AH=C6h (get POS data) supported
 4      INT 15/AH=C7h (return memory map info) supported
 3      INT 15/AH=C8h (en/disable CPU functions) supported
 2      non-8042 keyboard controller
 1      data streaming supported
 0      reserved
SeeAlso: #00509,#00512,AH=C6h,AH=C7h,AH=C8h,INT 16/AH=09h

Bitfields for feature byte 3:
Bit(s)  Description     (Table 00512)
 7      not used
 6-5    reserved
 4      POST supports ROM-to-RAM enable/disable
 3      SCSI subsystem supported on system board
 2      information panel installed
 1      IML (Initial Machine Load) system (BIOS loaded from disk)
 0      SCSI supported in IML
SeeAlso: #00509,#00511,#00512

Bitfields for feature byte 4:
Bit(s)  Description     (Table 00513)
 7      IBM "private" (set on N51SX, CL57SX)
 6      system has EEPROM
 5-3    ABIOS presence
        001 not supported
        010 supported in ROM
        011 supported in RAM (must be loaded)
 2      "private"
 1      system supports memory split at/above 16M
 0      POSTEXT directly supported by POST
SeeAlso: #00509,#00512,#00514

Bitfields for feature byte 5 (IBM):
Bit(s)  Description     (Table 00514)
 7-5    IBM "private"
 4-2    reserved
 1      system has enhanced mouse mode
 0      flash EPROM
SeeAlso: #00509,#00513

(Table 00515)
Values for model/submodel/revision:
Model  Submdl  Rev      BIOS date       System
 FFh    *       *       04/24/81        PC (original)
 FFh    *       *       10/19/81        PC (some bugfixes)
 FFh    *       *       10/27/82        PC (HD, 640K, EGA support)
 FFh    00h     rev       ???           Tandy 1000SL
 FFh    01h     rev       ???           Tandy 1000TL
 FFh    46h     ***       ???           Olivetti M15
 FEh    *       *       08/16/82        PC XT
 FEh    *       *       11/08/82        PC XT and Portable
 FEh    *       *       ../..x..        Toshiba laptops up to ~1987
                                        ("x"=product ID) (see #00521)
 FEh    43h     ***       ???           Olivetti M240
 FEh    A6h     ???       ???           Quadram Quad386
 FDh    *       *       06/01/83        PCjr
 FCh    *       *       01/10/84        AT models 068,099 6 MHz 20MB
 FCh    *       *       02/25/93        Linux DOSEMU (all versions)
 FCh    00h     00h       ???           PC3270/AT
 FCh    00h     01h     06/10/85        AT model  239     6 MHz 30MB
 FCh    00h     > 01h     ???           7531/2 Industrial AT
 FCh    01h     00h     11/15/85        AT models 319,339 8 MHz, Enh Keyb, 3.5"
 FCh    01h     00h     09/17/87        Tandy 3000
 FCh    01h     00h     ../..x..        Toshiba laptops since ~1988
                                        ("x"=product ID) (see #00521)
 FCh    01h     00h     03/08/93        Compaq DESKPRO/i
 FCh    01h     00h      various        Compaq DESKPRO, SystemPro, ProSignia
 FCh    01h     00h     07/20/93        Zenith Z-Lite 425L
 FCh    01h     00h     04/09/90        AMI BIOS
 FCh    01h     20h     06/10/92        AST
 FCh    01h     30h       ???           Tandy 3000NL
 FCh    01h     ???       ???           Compaq 286/386
 FCh    02h     00h     04/21/86        PC XT-286
 FCh    02h     00h      various        Compaq LTE Lite
 FCh    02h     00h     08/05/93        Compaq Contura 486/486c/486cx
 FCh    02h     00h     08/11/88        SoftWindows 1.0.1 (Power Macintosh)
 FCh    04h     00h     02/13/87     ** PS/2 Model 50 (10 MHz/1 ws 286)
 FCh    04h     01h     05/09/87        PS/2 Model 50 (10 Mhz 286, LW-type 32)
 FCh    04h     02h       ???           PS/2 Model 50
 FCh    04h     02h     01/28/88        PS/2 Model 50Z (10 Mhz 286, LW-type 33)
 FCh    04h     03h     04/18/88        PS/2 Model 50Z (10 MHz/0 ws 286)
 FCh    04h     04h       ???           PS/2 Model 50Z
 FCh    05h     00h     02/13/87     ** PS/2 Model 60 (10 MHz 286)
 FCh    06h     00h       ???           IBM 7552-140 "Gearbox"
 FCh    06h     01h       ???           IBM 7552-540 "Gearbox"
 FCh    08h     ***       ???           Epson, unknown model
 FCh    08h     00h       ???           PS/2 Model 25/286
 FCh    09h     00h       ???           PS/2 Model 25 (10 MHz 286)
 FCh    09h     00h     08/25/88        PS/2 Model 30 286 (10 Mhz, LW-type 37)
 FCh    09h     02h     06/28/89        PS/2 Model 30-286
 FCh    09h     02h     06/28/89        PS/2 Model 25 286 (10 Mhz, LW-type 37)
 FCh    0Bh     00h     12/01/89        PS/1 (LW-Type 44)
 FCh    0Bh     00h     02/16/90        PS/1 Model 2011 (10 MHz 286)
 FCh    20h     00h     02/18/93        Compaq ProLinea
 FCh    25h     09h     12/07/91        PS/2 Model 56 SLC (20 MHz 386SLC)
 FCh    30h     ***       ???           Epson, unknown model
 FCh    31h     ***       ???           Epson, unknown model
 FCh    33h     ***       ???           Epson, unknown model
 FCh    42h     ***       ???           Olivetti M280
 FCh    45h     ***       ???           Olivetti M380 (XP 1, XP3, XP 5)
 FCh    48h     ***       ???           Olivetti M290
 FCh    4Fh     ***       ???           Olivetti M250
 FCh    50h     ***       ???           Olivetti M380 (XP 7)
 FCh    51h     ***       ???           Olivetti PCS286
 FCh    52h     ***       ???           Olivetti M300
 FCh    81h     00h     01/15/88        Phoenix 386 BIOS v1.10 10a
 FCh    81h     01h       ???           "OEM machine"
 FCh    82h     01h       ???           "OEM machine"
 FCh    94h     00h       ???           Zenith 386
 FBh    00h     01h     01/10/86        PC XT-089, Enh Keyb, 3.5" support
 FBh    00h     01h     05/13/94        HP 200LX 2MB BIOS 1.01 A D german
 FBh    00h     02h     05/09/86        PC XT
 FBh    00h     04h     08/19/93        HP 100LX 1MB BIOS 1.04 A
 FBh    4Ch     ***       ???           Olivetti M200
 FAh    00h     00h     09/02/86        PS/2 Model 30 (8 MHz 8086)
 FAh    00h     01h     12/12/86        PS/2 Model 30
 FAh    00h     02h     02/05/87        PS/2 Model 30
 FAh    01h     00h     06/26/87        PS/2 Model 25/25L (8 MHz 8086)
 FAh    30h     00h       ???           IBM Restaurant Terminal
 FAh    4Eh     ***       ???           Olivetti M111
 FAh    FEh     00h       ???           IBM PCradio 9075
 F9h    00h     00h     09/13/85        PC Convertible
 F9h    FFh     00h       ???           PC Convertible
 F8h    00h     00h     03/30/87     ** PS/2 Model 80 (16MHz 386)
 F8h    00h     00h       ???           PS/2 Model 75 486 (33Mhz 486)
 F8h    01h     00h     10/07/87        PS/2 Model 80 (20MHz 386)
 F8h    02h     00h       ???           PS/2 Model 55-5571
 F8h    04h     00h     01/29/88        PS/2 Model 70 (20 Mhz 386DX,LW-type 33)
 F8h    04h     02h     04/11/88        PS/2 Model 70 20MHz, type 2 system brd
 F8h    04h     03h     03/17/89        PS/2 Model 70 20MHz, type 2 system brd
 F8h    05h     00h       ???           IBM PC 7568
 F8h    06h     00h       ???           PS/2 Model 55-5571
 F8h    07h     00h       ???           IBM PC 7561/2
 F8h    07h     01h       ???           PS/2 Model 55-5551
 F8h    07h     02h       ???           IBM PC 7561/2
 F8h    07h     03h       ???           PS/2 Model 55-5551
 F8h    09h     00h     01/29/88        PS/2 Model 70 16MHz 386DX, type 1 sysbd
 F8h    09h     02h     04/11/88        PS/2 Model 70 some models
 F8h    09h     03h     03/17/89        PS/2 Model 70 some models
 F8h    09h     04h     12/15/89        PS/2 Model 70 (16 Mhz 386, LW-type 33)
 F8h    0Bh     00h     01/18/89        PS/2 Model P70 (8573-121) typ 2 sys brd
 F8h    0Bh     02h     12/16/89        PS/2 Model P70 ??
 F8h    0Ch     00h     11/02/88        PS/2 Model 55SX (16 MHz 386SX)
 F8h    0Dh     00h       ???           PS/2 Model 70 25MHz, type 3 system brd
 F8h    0Dh     00h     06/08/88        PS/2 Model 70 386 25MHz, type 3 sys brd
 F8h    0Dh     01h     02/20/89        PS/2 Model 70 386 25MHz, type 3 sys brd
 F8h    0Dh     ???     12/01/89        PS/2 Model 70 486 25Mhz, type 3 sys brd
 F8h    0Eh     00h       ???           PS/1 486SX
 F8h    0Fh     00h       ???           PS/1 486DX
 F8h    10h     00h       ???           PS/2 Model 55-5551
 F8h    11h     00h     10/01/90        PS/2 Model 90 XP (25 MHz 486)
 F8h    12h     00h       ???           PS/2 Model 95 XP
 F8h    13h     00h     10/01/90        PS/2 Model 90 XP (33 MHz 486)
 F8h    14h     00h     10/01/90        PS/2 Model 90-AK9 (25 MHz 486), 95 XP
 F8h    15h     00h       ???           PS/2 Model 90 XP
 F8h    16h     00h     10/01/90        PS/2 Model 90-AKD / 95XP486 (33MHz 486)
 F8h    17h     00h       ???           PS/2 Model 90 XP
 F8h    19h     05h       ???           PS/2 Model 35/35LS or 40 (20 MHz 386SX)
 F8h    19h     05h     03/15/91        PS/2 Model 35 SX / 40 SX (LW-type 37)
 F8h    19h     06h     04/04/91        PS/2 Model 35 SX / 40 SX (LW-type 37)
 F8h    1Ah     00h       ???           PS/2 Model 95 XP
 F8h    1Bh     00h     09/29/89        PS/2 Model 70 486 (25 Mhz 386DX)
 F8h    1Bh     00h     10/02/89        PS/2 Model 70-486 (25 MHz 486)
 F8h    1Ch     00h     02/08/90        PS/2 Model 65-121 / 65 SX (16MHz 386SX)
 F8h    1Eh     00h     02/08/90        PS/2 Model 55LS (16 MHz 386SX)
 F8h    23h     00h       ???           PS/2 Model L40 SX
 F8h    23h     01h       ???           PS/2 Model L40 SX (20 MHz 386SX)
 F8h    23h     02h     02/27/91        PS/2 Model L40 SX (20Mhz386SX,LW-typ37)
 F8h    25h     00h       ???           PS/2 Model 57 SLC
 F8h    25h     06h       ???           PS/2 Model M57 (20 MHz 386SLC)
 F8h    26h     00h       ???           PS/2 Model 57 SX
 F8h    26h     01h       ???           PS/2 Model 57 (20 MHz 386SX)
 F8h    26h     02h     07/03/91        PS/2 Model 57 SX (20Mhz 386SX, SCSI)
 F8h    28h     00h       ???           PS/2 Model 95 XP
 F8h    29h     00h       ???           PS/2 Model 90 XP
 F8h    2Ah     00h       ???           PS/2 Model 95 XP (50 MHz 486)
 F8h    2Bh     00h       ???           PS/2 Model 90 / 90XP486 (50 MHz 486)
 F8h    2Ch     00h       ???           PS/2 Model 95 XP
 F8h    2Ch     01h       ???           PS/2 Model 95 (20 MHz 486SX)
 F8h    2Dh     00h       ???           PS/2 Model 90 XP (20 MHz 486SX)
 F8h    2Eh     00h       ???           PS/2 Model 95 XP
 F8h    2Eh     00h       ???           PS/2 Model 95 XP486 (20 Mhz 486SX)
 F8h    2Eh     01h       ???           PS/2 Model 95 (20 MHz 486SX + 487SX)
 F8h    2Fh     00h       ???           PS/2 Model 90 XP (20 MHz 486SX + 487SX)
 F8h    30h     00h       ???           PS/1 Model 2121 (16 MHz 386SX)
 F8h    33h     00h       ???           PS/2 Model 30-386
 F8h    34h     00h       ???           PS/2 Model 25-386
 F8h    36h     00h       ???           PS/2 Model 95 XP
 F8h    37h     00h       ???           PS/2 Model 90 XP
 F8h    38h     00h       ???           PS/2 Model 57
 F8h    39h     00h       ???           PS/2 Model 95 XP
 F8h    3Fh     00h       ???           PS/2 Model 90 XP
 F8h    40h     00h       ???           PS/2 Model 95 XP
 F8h    41h     00h       ???           PS/2 Model 77
 F8h    45h     00h       ???           PS/2 Model 90 XP (Pentium)
 F8h    46h     00h       ???           PS/2 Model 95 XP (Pentium)
 F8h    47h     00h       ???           PS/2 Model 90/95 E (Pentium)
 F8h    48h     00h       ???           PS/2 Model 85
 F8h    49h     00h       ???           PS/ValuePoint 325T
 F8h    4Ah     00h       ???           PS/ValuePoint 425SX
 F8h    4Bh     00h       ???           PS/ValuePoint 433DX
 F8h    4Eh     00h       ???           PS/2 Model 295
 F8h    50h     00h       ???           PS/2 Model P70 (8573) (16 MHz 386)
 F8h    50h     01h     12/16/89        PS/2 Model P70 (8570-031)
 F8h    52h     00h       ???           PS/2 Model P75 (33 MHz 486)
 F8h    56h     00h       ???           PS/2 Model CL57 SX
 F8h    57h     00h       ???           PS/2 Model 90 XP
 F8h    58h     00h       ???           PS/2 Model 95 XP
 F8h    59h     00h       ???           PS/2 Model 90 XP
 F8h    5Ah     00h       ???           PS/2 Model 95 XP
 F8h    5Bh     00h       ???           PS/2 Model 90 XP
 F8h    5Ch     00h       ???           PS/2 Model 95 XP
 F8h    5Dh     00h       ???           PS/2 Model N51 SLC
 F8h    5Eh     00h       ???           IBM ThinkPad 700
 F8h    61h     ***       ???           Olivetti P500
 F8h    62h     ***       ???           Olivetti P800
 F8h    80h     00h       ???           PS/2 Model 80 (25 MHz 386)
 F8h    80h     01h     11/21/89        PS/2 Model 80-A21 (25 Mhz 386)
 F8h    81h     00h       ???           PS/2 Model 55-5502
 F8h    87h     00h       ???           PS/2 Model N33SX
 F8h    88h     00h       ???           PS/2 Model 55-5530T
 F8h    97h     00h       ???           PS/2 Model 55 Note N23SX
 F8h    99h     00h       ???           PS/2 Model N51 SX
 F8h    F2h     30h       ???           Reply Model 32
 F8h    F6h     30h       ???           Memorex Telex
 F8h    FDh     00h       ???           IBM Processor Complex (with VPD)
 F8h    ???     ???       ???           PS/2 Model 90 (25 MHz 486SX)
 F8h    ???     ???       ???           PS/2 Model 95 (25 MHz 486SX)
 F8h    ???     ???       ???           PS/2 Model 90 (25 MHz 486SX + 487SX)
 F8h    ???     ???       ???           PS/2 Model 95 (25 MHz 486SX + 487SX)
 E4h    ???     ???       ???           Triumph Adler PC/XT
 E1h    ???     ???       ???           ??? (checked for by DOS4GW.EXE)
 E1h    00h     00h       ???           PS/2 Model 55-5530 Laptop
 D9h    ???     ???       ???           Peacock XT
 9Ah    *       *         ???           Compaq XT/Compaq Plus
 30h    ???     ???       ???           Sperry PC
 2Dh    *       *         ???           Compaq PC/Compaq Deskpro
 ???    56h     ???       ???           Olivetti, unknown model
 ???    74h     ???       ???           Olivetti, unknown model
Notes:  BIOS dates may vary without changes to the revision code, especially
          for non-IBM machines
    * This BIOS call is not implemented in these early versions or under
      Linux's DOSEMU.  Read the Model byte at F000h:FFFEh and BIOS date at
      F000h:FFF5h instead.
   ** These BIOS versions require the DASDDRVR.SYS patches.
  *** These Olivetti and Epson machines store the submodel in the byte at
        F000h:FFFDh.
SeeAlso: #00509,#00516

(Table 00516)
Values for Dell model byte:
 02h    Dell 200
 03h    Dell 300
 05h    Dell 220
 06h    Dell 310
 07h    Dell 325
 09h    Dell 310A
 0Ah    Dell 316
 0Bh    Dell 220E
 0Ch    Dell 210
 0Dh    Dell 316SX
 0Eh    Dell 316LT
 0Fh    Dell 320LX
 11h    Dell 425E
SeeAlso: #00509,#00515

Format of Compaq product information:
Address         Size    Description     (Table 00517)
 F000h:FFE4h    BYTE    product family code (first byte)
 F000h:FFE5h    BYTE    Point release number
 F000h:FFE6h    BYTE    ROM version code
 F000h:FFE7h    BYTE    product family code (second byte)
 F000h:FFE8h    WORD    BIOS type code
SeeAlso: #00518,#00520

Format of Hewlett-Packard ROM ID at F000h:00F8h:
Offset  Size    Description     (Table 00518)
 00h  2 BYTEs   signature "HP" (48h 50h)
 02h  2 BYTEs   00h 00h
 04h    BYTE    secondary code revision
 05h    BYTE    primary code revision
 06h    BYTE    date code, year-1960 (BCD)
 07h    BYTE    date code, week of year (BCD)
SeeAlso: #00517,#00519

Bitfields for Hewlett-Packard product identifier:
Bit(s)  Description     (Table 00519)
 4-0    machine code
        0 original Vectra
        1 ES/12
        2 RS/20
        3 Portable/CS
        4 ES
        5 CS
        6 RS/16
        other reserved
 7-5    CPU type
        0 = 80286
        1 = 8088
        2 = 8086
        3 = 80386
        other reserved
SeeAlso: #00518

Format of Toshiba laptop information:
Offset  Size    Description     (Table 00520)
 00h  8 BYTEs   ASCII product number (e.g. "T2200SX ")
 08h  8 BYTEs   ASCII version number (e.g. "V1.20   ")
 10h  8 BYTEs   ASCII signature string "TOSHIBA "
 18h  8 BYTEs   always zero???
 20h    DWORD   -> built-in BIOS setup program entry point or 0000h:0000h
Note:   this record is located at F000h:E000h
SeeAlso: #00517,#00518

(Table 00521)
Values for Toshiba product ID:
model prodID   version    date     product number
 FEh    29h             ../..)..   Toshiba T1000LE
 FEh    2Ah             ../..*..   Toshiba T1000XE
 FEh    2Bh             ../..+..   Toshiba T1000SE
 FEh    2Ch             ../..,..   Toshiba T1000
 FEh    2Dh             ../..-..   Toshiba T1200F
 FEh    2Dh     V4.00   12/26-87   Toshiba T1200H
 FEh    2Eh             ../.....   Toshiba T1100+
 FCh    22h             ../.."..   Toshiba T8500
 FCh    26h             01/15&88   Toshiba T5200
 FCh    27h             ../..'..   Toshiba T5100
 FCh    28h             ../..(..   Toshiba T2000
 FCh    2Ah             12/26*89   Toshiba T1200XE
 FCh    2Bh             ../..+..   Toshiba T1600
 FCh    2Ch             ../..,..   Toshiba T3100e
 FCh    2Dh             ../..-..   Toshiba T3200
 FCh    2Fh             ../../..   Toshiba T3100
 FCh    34h     V1.50   02/04494   Toshiba T100X
 FCh    38h             ../..8..   Toshiba T2000SXe
 FCh    39h     V1.20   09/16991   Toshiba T2200SX
 FCh    39h     V1.40   10/01992   Toshiba T2200SX
 FCh    3Ch     V1.50   01/28<91   Toshiba T2000SX
 FCh    3Dh             ../..=..   Toshiba T3200SXC
 FCh    3Eh             ../..>..   Toshiba T3100SX
 FCh    3Fh             ../..?..   Toshiba T3200SX
 FCh    40h             ../..@..   Toshiba T4500C
 FCh    41h     V1.20   04/05A92   Toshiba T4500     ("T4500SXC" ???)
 FCh    45h     V3.20   04/14E92   Toshiba T4400SX   ("C" or "SXC" on cover)
 FCh    45h             01/13E93   Toshiba T4400SXC
 FCh    46h *           ../..F..   Toshiba T6400
 FCh    46h *           ../..F..   Toshiba T6400C
 FCh    5Fh     V1.40   01/18_94   Toshiba T3300SL
 FCh    69h             ../..i..   Toshiba T1900C    ("T1900CT" ???)
 FCh    6Ah     V1.30   05/19j93   Toshiba T1900     ("T1900S" ???)
 FCh    6Dh     V1.10   12/25m92   Toshiba T1850C
 FCh    6Eh     V1.00   08/19n92   Toshiba T1850
 FCh    6Eh     V1.10   12/25n92   Toshiba T1850
 FCh    6Fh     V1.00   07/17o92   Toshiba T1800
 FCh    6Fh     V1.10   12/25o92   Toshiba T1800
 FCh    7Eh     V1.30   06/17~93   Toshiba T4600C
 FCh    7Fh     V1.40   11/10x94   Toshiba T4600
 FCh    8Ah     V1.30   10/22x93   Toshiba T6600C
 FCh    91h     V1.20   07/15x94   Toshiba T2400CT
 FCh    91h     V5.00   07/28x95   Toshiba T2400CS/CT
 FCh    92h     V5.00   07/28x95   Toshiba T3600CT
 FCh    96h *   V1.40   12/08x94   Toshiba T200
 FCh    96h *   V1.50   12/08x94   Toshiba T200CS       (T200)
 FCh    97h             ../..x..   Toshiba T4800CT
 FCh    98h *   V1.10   12/22x93   Toshiba T1910
 FCh    98h *   V2.40   07/12x94   Toshiba T1910/CS     (T19XX)
 FCh    99h             ../..x..   Toshiba T4700CS
 FCh    9Bh     V2.30   01/31x94   Toshiba T4700CT
 FCh    9Bh     V2.50   03/22x94   Toshiba T4700CT
 FCh    9Bh     V5.00   07/28x95   Toshiba T4700CT
 FCh    9Ch     V1.30   01/11x94   Toshiba T1950CT
 FCh    9Ch     V2.50   07/22x94   Toshiba T1950CT      (T19XX)
 FCh    9Dh *   V2.40   07/12x94   Toshiba T1950/CS     (T19XX)
 FCh    9Eh *   V1.20   12/25x93   Toshiba T3400
 FCh    9Eh *   V1.30   03/22x94   Toshiba T3400/CT
 FCh    B5h **  V5.10   08/25x95   Toshiba T2110/CS     (T21XX)
 FCh    B5h     V5.10   08/25x95   Toshiba T2130CS/CT   (T21XX)
 FCh    BAh     V1.30   02/16x95   Toshiba T2150CDS/CDT
 FCh    BAh     V5.00   07/27x95   Toshiba T2150CDS/CDT (T2150)
 FCh    BBh **  V1.30   01/25x95   Toshiba T2100/CS/CT
 FCh    BBh **  V5.00   07/27x95   Toshiba T2100/CS/CT
 FCh    BCh     V1.20   12/05x94   Toshiba T2450CT
 FCh    BCh     V5.00   07/28x95   Toshiba T2450CT
 FCh    BEh     V5.00   07/28x95   Toshiba T4850CT
 FCh    C0h     V5.20   05/30x96   Toshiba 420CDS/CDT
 FCh    C1h     V5.20   03/27x96   Toshiba 100CS
 FCh    C3h     V5.60   07/19x96   Toshiba 710CDT / 720CDT
 FCh    C6h     V5.30   11/30x95   Toshiba 410CS/CDT
 FCh    CAh     V5.10   08/18x95   Toshiba 400CS/CDT
 FCh    CAh     V5.40   12/18x95   Toshiba 400CS/CDT
 FCh    CBh     V5.10   09/01x95   Toshiba 610CT
 FCh    CCh     V5.50   06/13x96   Toshiba 700CS/CT
 FCh    CFh     V5.00   08/07x95   Toshiba T4900CT
 FCh    DCh     V5.10   06/17x96   Toshiba 650CT
 FCh    DCh     V5.10   05/10x96   Toshiba 110CS/CT
 FCh    DDh     V5.10   05/10x96   Toshiba 110CS/CT
 FCh    DFh     V5.20   05/27x96   Toshiba 500CS/CDT
 FCh    ???     V5.???  ../..x..   Toshiba 620CT
 FCh    ???     V5.???  ../..x..   Toshiba 660CDT
 FCh    ???     V5.30   11/22/96   Toshiba 730CDT
 FCh    ???     V6.00   09/20/96   Toshiba 200CDS/CDT
 FCh    ???     V6.20   11/14/96   Toshiba 430CDS/CDT
 FCh    ???     V6.40   12/05/96   Toshiba 510CS/CDT
Notes:  the 8-bit ASCII graphics character in the "date" column above
          has been substituted by "x" if larger than 80h
        BIOS version numbers and dates may vary, esp. due to harddisk and
          (flash) BIOS upgrades; all BIOS versions 5.xx are flash updates
          for Windows95, the product number may indicate the series only
          (T21XX) or does no longer contain the exact type suffix (CS/CT)
        the most recent versions of the BIOS have stopped including the
          product ID code in the BIOS date
        [*] These models have monochrome and color versions which can be
          distinguished with INT 42/AX=7503h (WD90C24 chipset)
        [**] These models have monochrome and color versions which can be
          distinguished with INT 10/AX=5F50h (CT655xx chipset)
        models not found here like T21x5 are variants differing only in
          bundled software
SeeAlso: #00515
--------B-15C1-------------------------------
INT 15 - SYSTEM - RETURN EXTENDED-BIOS DATA-AREA SEGMENT ADDRESS (PS)
        AH = C1h
Return: CF set on error
        CF clear if successful
            ES = segment of data area (see #M0001,#M0004,#M0005)
SeeAlso: AH=04h"ABIOS",MEM 0040h:000Eh"DATA"
--------M-15C200-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - ENABLE/DISABLE
        AX = C200h
        BH = new state
            00h disabled
            01h enabled
Return: CF set on error
        AH = status (see #00522)
Note:   IBM classifies this function as required
SeeAlso: AX=C201h,AX=C207h,AX=C208h

(Table 00522)
Values for pointing device function status:
 00h    successful
 01h    invalid function
 02h    invalid input
 03h    interface error
 04h    need to resend
 05h    no device handler installed
--------M-15C201-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - RESET
        AX = C201h
Return: CF set on error
            AH = status (see #00522)
        CF clear if successful
            BH = device ID
            BL = value returned by attached device after reset
                AAh if device is a mouse
Notes:  after successful completion of this call, the pointing device is set
          as follows: disabled, sample rate 100 Hz, resolution 4 counts/mm,
          scaling 1:1, unchanged data package size
        IBM classifies this function as required
SeeAlso: INT 33/AX=0000h,AX=C200h,AX=C207h
--------M-15C202-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - SET SAMPLING RATE
        AX = C202h
        BH = sampling rate
            00h 10/second
            01h 20/second
            02h 40/second
            03h 60/second
            04h 80/second
            05h 100/second
            06h 200/second
Return: CF set on error
            AH = status (see #00522)
SeeAlso: INT 33/AX=001Ch
--------M-15C203-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - SET RESOLUTION
        AX = C203h
        BH = resolution (see #00523)
Return: CF set on error
            AH = status (see #00522)

(Table 00523)
Values for pointing device resolution:
 00h    one count per mm
 01h    two counts per mm
 02h    four counts per mm
 03h    eight counts per mm
--------M-15C204-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - GET TYPE
        AX = C204h
Return: CF set on error
            AH = status (see #00522)
        CF clear if successful
            BH = device ID
--------M-15C205-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - INITIALIZE
        AX = C205h
        BH = data package size (1 - 8 bytes)
Return: CF set on error
            AH = status (see #00522)
Note:   the pointing device is set as follows: disabled, 100 Hz sample rate,
          resolution 4 counts/mm, scaling 1:1
SeeAlso: AX=C201h
--------M-15C206-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - EXTENDED COMMANDS
        AX = C206h
        BH = subfunction
            00h return device status
                Return: BL = pointing device status (see #00524)
                        CL = resolution (see #00523)
                        DL = sample rate, reports per second
            01h set scaling at 1:1
            02h set scaling at 2:1
Return: CF set on error
            AH = status (see #00522)

Bitfields for pointing device status:
Bit(s)  Description     (Table 00524)
 0      right button pressed
 1      reserved
 2      left button pressed
 3      reserved
 4      0 if 1:1 scaling, 1 if 2:1 scaling
 5      device enabled
 6      0 if stream mode, 1 if remote mode
 7      reserved
--------M-15C207-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - SET DEVICE HANDLER ADDR
        AX = C207h
        ES:BX -> FAR user device handler or 0000h:0000h to cancel
Return: CF set on error
            AH = status (see #00522)
Note:   when the subroutine is called, it is passed the following values on
          the stack; the handler should return with a FAR return without
          popping the stack:
                WORD 1: status (see #00525)
                WORD 2: X data (high byte = 00h)
                WORD 3: Y data (high byte = 00h)
                WORD 4: 0000h
SeeAlso: INT 33/AX=000Ch

Bitfields for pointing device status:
Bit(s)  Description     (Table 00525)
 15-8   reserved (0)
 7      Y data overflowed
 6      X data overflowed
 5      Y data is negative
 4      X data is negative
 3      reserved (1)
 2      reserved (0)
 1      right button pressed
 0      left button pressed
--------M-15C208-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE - WRITE TO POINTER PORT
        AX = C208h
        BL = byte to be sent to the pointing device
Note:   IBM classifies this function as optional
SeeAlso: AX=C200h,AX=C209h
--------M-15C209-----------------------------
INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE - READ FROM POINTER PORT
        AX = C209h
Return: BL = first byte read from pointing device
        CL = second byte read
        DL = third byte read
Note:   IBM classifies this function as optional
SeeAlso: AX=C200h,AX=C208h
--------M-15C2-------------------------------
INT 15 - IBM SurePath BIOS - Officially "Private" Function
        AH = C2h
        AL = 10h-23h
SeeAlso: AH=07h"IBM",AH=3Eh"IBM"
--------B-15C3------------------------------
INT 15 - SYSTEM - ENABLE/DISABLE WATCHDOG TIMEOUT (PS50+)
        AH = C3h
        AL = function
            00h disable PS/2 watchdog timer
            01h enable PS/2 watchdog timer
                BX = timer counter (0001h-00FFh)
            02h disable Gearbox system
            03h enable Gearbox system
Return: CF set on error
        CF clear if successful
Note:   the watchdog timer generates an NMI
SeeAlso: INT 21/AH=2Bh/CX=6269h"WDTSR"
--------B-15C4-------------------------------
INT 15 - SYSTEM - PROGRAMMABLE OPTION SELECT (PS50+)
        AH = C4h
        AL = subfunction
            00h return base POS register address
            01h enable selected slot for setup
                BL = slot number (1 to 8)
            02h disable setup for all slots (enable adapter)
Return: CF set on error
        DX = base POS register address (if subfunction 00h)
SeeAlso: AH=C6h
--------B-15C5-------------------------------
INT 15 UC - OS HOOK - ROM BIOS TRACING CALLOUT (PS30/286,PS50Z,PS95)
        AH = C5h
        AL = interrupt being invoked
            01h INT 19
            02h INT 14
            03h INT 16
            04h INT 40 (floppy INT 13)
            05h INT 17
            06h INT 10
            07h INT 12
            08h INT 11
            09h INT 1A
Return: all registers except AX must be preserved
Notes:  called as the very first action of the indicated ROM BIOS interrupt
          handlers on the PS/2 Models 30/286, 50Z, and 95
        default handler does nothing and returns CF clear for the above
          subfunctions, CF set and AH=86h for all other subfunctions
        value of AX passed to the original interrupt handler is pushed on
          stack immediately prior to call
--------B-15C6-------------------------------
INT 15 U - later PS/2 models - GET POS DATA
        AH = C6h
        ???
Return: ???
Notes:  this function is referenced by name and number in some IBM BIOS manuals
        IBM reports that "there are a number of problems with this call" and
          does not recommend its use.
SeeAlso: AH=C4h
--------B-15C7-------------------------------
INT 15 - SYSTEM - later PS/2s - RETURN MEMORY-MAP INFORMATION
        AH = C7h
        DS:SI -> user supplied memory map table (see #00526)
Return: CF set on error
        CF clear if successful
Notes:  call AH=C0h and examine bit 4 of feature byte 2 to check if this
          function is supported
        IBM classifies this function as optional
        Windows95 OSR2 reportedly does not support this function even though
          INT 15/AH=C0h indicates that it is available (observed on several
          different systems)
SeeAlso: AH=C0h,AH=C9h,AH=D1h,AX=E820h

Format of memory-map table structure:
Offset  Size    Description     (Table 00526)
 00h    WORD    length of table (excluding this word)
 02h    DWORD   local memory between 1M and 16M, in 1K blocks
 06h    DWORD   local memory between 16M and 4G, in 1K blocks
 0Ah    DWORD   system memory between 1M and 16M, in 1K blocks
 0Eh    DWORD   system memory between 16M and 4G, in 1K blocks
 12h    DWORD   cacheable memory between 1M and 16M, in 1K blocks
 16h    DWORD   cacheable memory between 16M and 4G, in 1K blocks
 1Ah    DWORD   1K blocks before start of non-system memory between 1M and 16M
 1Eh    DWORD   1K blocks before start of non-system memory between 16M and 4G
 22h    WORD    start segment of largest free block from C0000h-DFFFFh
 24h    WORD    size of largest free block
 26h    DWORD   reserved
--------B-15C8-------------------------------
INT 15 - SYSTEM - ENABLE/DISABLE PROCESSOR FUNCTIONS
        AH = C8h
        AL = function
            00h disable L1 cache
            01h enable L1 cache
            ---models 90 and 95 only---
            02h disable L2 cache
            03h enable L2 cache
            04h disable both caches
            05h enable both caches
            06h return status of both caches
            07h-FFh Reserved
Return: CF set on error
        CF clear if successful
        AH = status (see #00527)
        For subfunction 06h only:
            BL = status of L1 cache
                00h enabled
                01h disabled or not installed
                02h disabled due to test error (can not be enabled)
            BH = status of L2 cache (same codes as BL)
Notes:   supported by at least PS/2 70, 70/486, 80-A21, 90, 95
        call AH=C0h and examine bit 3 of feature byte 2 to check if this
          function is supported.
        on a 486 system, any external caches must be disabled when the
          on-chip cache (L1) is disabled.
SeeAlso: AH=C0h

(Table 00527)
Values for status:
 00h    operation successful
 01h    function choice (in AL) is invalid
 02h    NVRAM data is invalid
 03h    cache test error
 04h    (90 and 95 only) cannot perform operation requested due to state of
          other cache (also see note above)
 05h    no L2 cache is present
 07h    invalid input values
 09h    CPU in protected mode
--------B-15C9-------------------------------
INT 15 - newer PS/2; various BIOSes - GET CPU TYPE AND MASK REVISION
        AH = C9h
        AL = 10h (may be required on some non-PS BIOSes)
Return: CF clear if successful
            AH = 00h
            CH = CPU type (see #00528)
            CL = mask revision (stepping level) (see #00529)
        CF set on error
            AH = status (80h,86h = function not supported)
Notes:  the BIOS must save DX at startup in order to be able to support this
          call; PS/2 Models 56, 57, 90, and 95 are known to support it
        the PS/2 BIOS merely reads CMOS locations 190h (type) and 191h (rev)
        IBM classifies this function as optional
SeeAlso: AX=D100h,AX=DA92h,MEM 0040h:00BCh

(Table 00528)
Values for CPU type:
 03h    80386DX or clone
 04h    80486
 05h    Pentium
 23h    80386SX or clone
 33h    Intel i376
 43h    80386SL or clone
 A3h    IBM 386SLC
 A4h    IBM 486SLC

(Table 00529)
Values for stepping level:
---i376 (type code 33h)---
 05h    A0
 08h    B
---80386/80386DX (type code 03h)---
 03h    Intel B1 to B10, Am386DX/DXL step A
 05h    Intel D0
 08h    Intel D1/D2/E1, Am386DX/DXL step B
---80386SL (type code 43h)---
 05h    A
 1xh    B
---80386SX (type code 23h)---
 04h    Intel A0
 05h    Intel B, Am386SX/SXL step A1
 08h    Intel C/D1, Am386SX/SXL step B
 09h    Intel 386CX/386EX/386SXstatic step A
---80486DX (type code 04h)---
 00h    Intel A0/A1
 01h    Intel B2 to B6
 02h    Intel C0
 03h    Intel C1
 04h    Intel D0
 10h    Intel cA2/cA3, Cx486SLC step A
 11h    Intel cB0/cB1
---486DX2 (type code 04h)---
 02h    Am486DX2 (unknown stepping)
 32h    Intel DX2/Overdrive steps A0 to A2
 33h    Intel DX2/Overdrive step B1
---486SX (type code 04h)---
 20h    Intel A0
 22h    Intel B0
 27h    Intel cA0
 28h    Intel cB0
---486SL (type code 04h)---
 40h    Intel A
---IntelSX2 (type code 04h)---
 5xh    Intel A
---IntelDX4 (type code 04h)---
 8xh    Intel A
---487SX (type code 04h)---
 20h    Intel A0
 21h    Intel B0
---Pentium (type code 05h)---
 0xh    Intel P5 steps Ax (1993)
 1xh    Intel P5 steps Bx (1994)
 2xh    Intel P54C step A
---RapidCAD (type code 03h)---
 40h    A
--------B-15CA-------------------------------
INT 15 U - PS/2 Model 95 - READ/WRITE CMOS MEMORY
        AH = CAh
        AL = function
            00h read CMOS
                Return: CL = value of CMOS location
            01h write CMOS
                CL = new value for CMOS location
        BL = CMOS location (0Eh-3Fh)
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = error code (see #00530)
Note:   writes do not update the CMOS checksum

(Table 00530)
Values for CMOS read/write error code:
 01h    CMOS lost power or has invalid checksum
 03h    specified location out of range (too high)
 04h    specified location out of range (too low)
 80h    unsupported function (PC)
 86h    unsupported function (XT)
--------B-15CB-------------------------------
INT 15 U - PS/2 Model 95 - RESERVED
        AH = CBh
        ???
Return: ???
--------B-15CC-------------------------------
INT 15 U - PS/2 Model 95 - RESERVED
        AH = CCh
        ???
Return: ???
--------V-15CCCC-----------------------------
INT 15 U - Toshiba laptops - VCHAD.EXE - INSTALLATION CHECK
        AX = CCCCh
Return: AX = ABCDh if installed
Note:   supported by Toshiba VGA change display utility VCHAD.EXE ver 2.90+
          older versions have the string "VCHAD" 2 bytes after the address of
          the INT 15 handler which is hooked by all versions for the SysReq key
SeeAlso: AH=85h
--------B-15CD-------------------------------
INT 15 U - PS/2 Model 95 - RESERVED
        AH = CDh
        ???
Return: ???
--------B-15CE--BL00-------------------------
INT 15 - later PS/2s - ALLOCATE DMA ARBITRATION LEVEL
        AH = CEh
        BL = 00h-0Eh arbitration level to be allocated
             0Fh-FFh reserved
        AL = option byte
            bit 7-1: reserved (0)
            bit 0: 0 = need DMA channel for arbitration level requested
                   1 = no channel required for arbitration level
Return: CF set on error
            AH = status (80h,86h = function not supported)
        CF clear on success
            AL = channel number
                00h-07h channel number allocated for the arbiration level
                08h-FEh reserved
                FFh     no channel requested for arbitration level
            AH = status (see #00531)
Notes:   arbitration level 00h has the highest priority, 0Eh the lowest
         to perform a DMA transfer operation, be sure to call this function
           first, and call AH=CFh afterward.  Failure to use this function
           can cause unpredictable results.
SeeAlso: AH=CFh

(Table 00531)
Values for DMA arbitration status:
 00h    success
 01h    arbitration level not available
 02h    channel not available
 03h    invalid arbitration level passed
--------B-15CF-------------------------------
INT 15 - later PS/2s - DEALLOCATE DMA ARBITRATION LEVEL
        AH = CFh
        BL = arbitration level to be deallocated (see AH=CEh)
Return: CF set on error
            AH = status (80h,86h = function not supported)
        CF clear on success
            AH = status
                00h success
                04h arbitration level not allocated
SeeAlso: AH=CEh
--------B-15D0-------------------------------
INT 15 - later PS/2s - RESERVED
        AH = D0h
        ???
Return: ???
----------15D042BL00-------------------------
INT 15 R - Intel Pentium Pro BIOS UPDATE - INSTALLATION CHECK
        AX = D042h
        BL = 00h
Return: CF clear if successful
        CF set on error
        AH = status
            00h successful
                EBX:ECX = signature "INTELPEP"
                EDX = BIOS update loader version
                SI = number of 2K update blocks which can be recorded in NVRAM
            86h not implemented
        AL = OEM error (if AH is not 00h or 86h, otherwise undefined)
            00h successful
Program: the Pentium Pro BIOS update allows the system BIOS or other software
          to install a microcode patch into the Pentium Pro processor
Notes:  this API must be called from actual real mode, not V86 mode
        at least 32K stack space must be available when this function is called
SeeAlso: AX=D042h/BL=01h,AX=D042h/BL=02h,AX=D042h/BL=03h
SeeAlso: @xxxxh:xxxxh"Intel BIOS Upgrade",MSR 00000079h
----------15D042BL01-------------------------
INT 15 R - Intel Pentium Pro BIOS UPDATE - WRITE BIOS UPDATE AREA
        AX = D042h
        BL = 01h
        ES:DI -> microcode update block (see #00533)
        CX,DX,SI = segments of three 64K scratchpad areas for BIOS use
Return: CF clear if successful
        CF set on error
        AH = status (see #00532)
        AL = OEM error (if AH is not 00h or 86h, otherwise undefined)
            00h successful
Notes:  a microcode update may also be initiated by a WRMSR instruction
          with ECX=0079h, EDX=00000000h, and EAX=linear address of update
          block (see #00533)
        at least 32K stack space must be available when this function is called
SeeAlso: AX=D042h/BL=00h,AX=D042h/BL=02h,AX=D042h/BL=03h,MSR 00000079h

(Table 00532)
Values for Pentium Pro BIOS update status:
 00h    successful
 86h    not implemented
 90h    unable to erase NVRAM device
 91h    unable to write to NVRAM device
 92h    unable to read storage
 93h    NVRAM is full
 94h    specified processor stepping is not present in system
 95h    invalid header or loader version
 96h    wrong checksum in header
 97h    processor rejected the update
 98h    the same or a more recent update is already stored
 99h    update block number was out of range

Format of Pentium Pro microcode update block:
Offset  Size    Description     (Table 00533)
 00h    DWORD   update header version number (currently 00000001h)
                FFFFFFFFh = unused block
 04h    DWORD   revision number of this microcode update
 08h    DWORD   update creation date, as BCD mmddyyyy (month,day,year)
 0Ch    DWORD   family/model/stepping of processor to which update applied
                (same value as returned by CPUID instruction)
 10h    DWORD   checksum (used to force sum of all 512 DWORDs of the update
                block to 00000000h)
 14h    DWORD   revision number of loader needed to install update
                (currently 00000001h)
 18h 24 BYTEs   reserved for future expansion
 30h 2000 BYTEs encrypted microcode data
SeeAlso: MSR 00000079h,OPCODE "CPUID"
----------15D042BL02-------------------------
INT 15 R - Intel Pentium Pro BIOS UPDATE - BIOS UPDATE CONTROL
        AX = D042h
        BL = 02h
        BH = function
            01h enable update loading at initialization time
            02h check whether update loading is enabled
        CX,DX,SI = segments of three 64K scratchpad areas for BIOS use
Return: CF clear if successful
        CF set on error
        AH = status (see #00532)
            00h successful
                BL = enabled/disabled flag
            86h not implemented
        AL = OEM error (if AH is not 00h or 86h, otherwise undefined)
            00h successful
Notes:  this API must be called from actual real mode, not V86 mode
        at least 32K stack space must be available when this function is called
        there is no call to disable update loading due to security risks; the
          BIOS setup can disable loading
SeeAlso: AX=D042h/BL=00h,AX=D042h/BL=02h,AX=D042h/BL=03h
----------15D042BL03-------------------------
INT 15 R - Intel Pentium Pro BIOS UPDATE - READ BIOS UPDATE AREA
        AX = D042h
        BL = 03h
        ES:DI -> buffer for microcode update block (see #00533)
        ECX = two real-mode 64K scratchpad segments (upper and lower words)
        DX = segment of 64K scratchpad area for BIOS use
        SI = zero-based index number of update block to retrieve
Return: CF clear if successful
        CF set on error
        AH = status
            00h successful
                ES:DI buffer filled with 2048-byte update block
            86h not implemented
        AL = OEM error (if AH is not 00h or 86h, otherwise undefined)
            00h successful
Program: the Pentium Pro BIOS update allows the system BIOS or other software
          to install a microcode patch into the Pentium Pro processor
Notes:  this API must be called from actual real mode, not V86 mode
        at least 32K stack space must be available when this function is called
SeeAlso: AX=D042h/BL=00h,AX=D042h/BL=01h,AX=D042h/BL=03h
--------B-15D100DX0000-----------------------
INT 15 - later PS/2s - GET NUMBER OF DEVICE DESCRIPTOR TABLE (DDT) ENTRIES
        AX = D100h
        DX = 0000h (reserved, must set to 0)
Return: BL = size of one DDT entry, in bytes
        CX = number of DDT entries
        AH = return code (see #00534)
        CF set on error
        CF clear on success
SeeAlso: AH=C0h,AH=C7h,AH=C9h,AX=D101h,AX=D102h,AX=D103h,AX=D104h

(Table 00534)
Values for return code:
 00h    success
 01h    requested DDT entry not found
 02h    DDT data not valid
 86h    function not supported
--------B-15D101-----------------------------
INT 15 - later PS/2s - RETURN DEVICE DESCRIPTOR TABLE (DDT) ENTRY BY NUMBER
        AX = D101h
        BX = number of requested entry (starting with 1)
        DX = 0000h (reserved, must be set to 0)
        ES:DI -> buffer to contain DDT entry (see #00535)
Return: AH = return code (see #00534)
        CF set on error
        CF clear on success
            ES:DI buffer filled with DDT entry
SeeAlso: AH=C0h,AH=C7h,AH=C9h,AX=D100h,AX=D102h,AX=D104h

Format of Device Descriptor Table (DDT):
Offset  Size    Description     (Table 00535)
 00h    BYTE    bits 7-4: reserved (set to 0)
                bits 3-0: slot of device (0 = system board)
 01h    BYTE    bits 7-4: second interrupt for this device (0 = none)
                bits 3-0: first interrupt for this device (0 = none)
 02h    BYTE    bits 7-4: second arbitration level for this device
                bits 3-0: first arbitration level for this device
 03h    WORD    DDT indicators (see #00536)
 05h    BYTE    reserved (0)
 06h    WORD    device ID (0 = none)
 08h    WORD    starting address of first  I/O block (0 = none)
 0Ah    WORD    starting address of second I/O block (0 = none)
 OCh    WORD    starting address of third  I/O block (0 = none)
 OEh    DWORD   start of first non-system memory block (0 = none)
 12h    WORD    size of first non-system memory block (in kilobytes)
 14h    DWORD   start of second non-system memory block (0 = none)
 18h    WORD    size of second non-system memory block (in kilobytes)
 1Ah    BYTE    implementation identifier of the device
 1Bh    BYTE    implementation revision level of the device
Note:   I/O block addresses and non-system memory addresses are listed in
          ascending order in each DDT entry.

Bitfields for DDT indicators:
Bit(s)  Description     (Table 00536)
 15     reserved (0)
 14     second arbitration level exists
 13     first arbitration level exists
 12     serial interface is RS-422
 11     not address limited
 10     DMA channel used
 9      second arbitration level can be shared
 8      first arbitration level can be shared
 7-0    reserved (0)
--------B-15D102-----------------------------
INT 15 - later PS/2s - RETURN DEVICE DESCRIPTOR TABLE (DDT) ENTRY BY I/O ADDRSS
        AX = D102h
        BX = entry number at which to start searching
        CX = requested I/O port address
        DX = 0000h (reserved, must be set to 0)
        ES:DI -> buffer to contain DDT entry (see #00535)
Return: AH = return code (see #00534)
        BX = DDT entry number where I/O port was found, or total entries
             plus 1 if port was not found.
        CF set on error
        CF clear on success
            ES:DI buffer filled with DDT entry
Desc:   the DDT is searched from the specified entry for the I/O port in CX,
          and the first entry in which it is found is returned
SeeAlso: AH=C0h,AH=C7h,AH=C9h,AX=D100h,AX=D101h,AX=D103h,AX=D104h
--------B-15D103DX0000-----------------------
INT 15 - later PS/2s - RETURN ENTIRE DDT
        AX = D103h
        DX = 0000h (reserved, must be set to 0)
        ES:DI -> buffer to contain DDT entry (see #00535)
Return: AH = return code (see #00534)
        CF set on error
        CF clear on success
            ES:DI buffer filled with DDT entry
SeeAlso: AH=C0h,AH=C7h,AH=C9h,AX=D100h,AX=D104h
--------B-15D104-----------------------------
INT 15 - later PS/2s - RETURN DEVICE DESCRIPTOR TABLE (DDT) ENTRY BY DEVICE ID
        AX = D104h
        BX = entry number at which to start searching
        CX = requested device ID
        DX = 0000h (reserved, must be set to 0)
        ES:DI -> buffer to contain DDT entry (see #00535)
Return: AH = return code (see #00534)
        BX = DDT entry number where device ID was found, or total entries
              plus 1 if port was not found.
        CF set on error
        CF clear on success
            ES:DI buffer filled with DDT entry
Desc:   the DDT is searched from the specified entry for the device ID in CX,
          and the first entry in which it is found is returned.
SeeAlso: AH=C0h,AH=C7h,AH=C9h,AX=D100h,AX=D101h,AX=D103h
--------B-15D2-------------------------------
INT 15 - later PS/2s - RESERVED
        AH = D2h
        ???
Return: ???
--------B-15D3-------------------------------
INT 15 - later PS/2s - RESERVED
        AH = D3h
        ???
Return: ???
--------B-15D4-------------------------------
INT 15 - later PS/2s - GET PHYSICAL FIXED DISK DRIVE NUMBER (SELECTABLE BOOT)
        AH = D4h
        DL = logical fixed disk drive number
Return: AH = return code (see #00537)
        CF set on error
        CF clear on success
            AL = physical fixed disk drive number

(Table 00537)
Values for return code:
 00h    success
 01h    specified logical drive number is invalid
 80h    function not supported (on PCjr and PC)
 86h    function not supported
--------B-15D5-------------------------------
INT 15 - later PS/2s - RESERVED
        AH = D5h
        ???
Return: ???
--------B-15D600BL00-------------------------
INT 15 - later PS/2s - READ BOOT DEVICE ID
        AX = D600h
        BL = 00h
        DX = device ID
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = status (86h for function not supported)
SeeAlso: AX=D600h/BL=01h,AX=D601h/BL=00h,AX=D602h
--------B-15D600BL01-------------------------
INT 15 - later PS/2s - WRITE BOOT DEVICE ID
        AX = D600h
        BL = 01h
        DX = device ID
Return: CF clear on success
            AH = 00h
        CF set on error
            AH = status (86h for function not supported)
SeeAlso: AX=D600h/BL=00h,AX=D601h/BL=01h
--------B-15D601BL00-------------------------
INT 15 - later PS/2s - READ BOOT DEVICE KEY
        AX = D601h
        BL = 00h
        DX = device ID
Return: CF clear on success
            AH = 00h
        CF set on error
            AH = status (86h for function not supported)
SeeAlso: AX=D600h/BL=00h,AX=D601h/BL=01h,AX=D602h
--------B-15D601BL01-------------------------
INT 15 - later PS/2s - WRITE BOOT DEVICE KEY
        AX = D601h
        BL = 01h
        DX = device ID
Return: CF clear on success
            AH = 00h
        CF set on error
            AH = status (86h for function not supported)
SeeAlso: AX=D600h/BL=01h,AX=D601h/BL=00h
--------B-15D602-----------------------------
INT 15 - later PS/2s - QUERY BOOT REFERENCE PARTITION
        AX = D602h
Return: CF clear on success
            AH = 00h
            AL = status of reference-partition boot request
                00h boot not requested
                01h boot requested
        CF set on error
            AH = status (86h for function not supported)
SeeAlso: AX=D601h/BL=00h
--------X-15D800-----------------------------
INT 15 - EISA SYSTEM ROM - READ SLOT CONFIGURATION INFORMATION
        AX = D800h
        CL = slot number (including embedded and virtual)
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = error code (80h,82h,83h,86h,87h)(see #00539)
        AL = bit flags (see #00538)
        BH = major revision level of configuration utility
        BL = minor revision level of configuration utility
        CX = checksum of configuration file
        DH = number of device functions
        DL = combined function information byte (see #00540)
        SI:DI = 4-byte compressed ID (DI = bytes 0&1, SI = bytes 2&3)
Note:   call with AL=80h if using 32-bit CS addressing mode instead of 16-bit
SeeAlso: AX=D801h,AX=D804h

Bitfields for EISA AL bit flags:
Bit(s)  Description     (Table 00538)
 7      set if duplicate IDs
 6      set if product ID readable
 4,5    slot type (00=expansion, 01=embedded, 10=virtual device)
 0-3    duplicate ID number if bit 7 set
SeeAlso: #00540

(Table 00539)
Values for EISA error code:
 80h    invalid slot number
 81h    invalid function number
 82h    EISA CMOS corrupt
 83h    empty slot
 84h    error clearing CMOS
 85h    EISA CMOS is full
 86h    invalid BIOS-FW function call
 87h    invalid system configuration
 88h    config utility version not supported

Bitfields for EISA combined function information byte:
Bit(s)  Description     (Table 00540)
 7      reserved
 6      slot has free-form data entries
 5      slot has port initialization entries
 4      slot has port-range entries
 3      slot has DMA entries
 2      slot has IRQ entries
 1      slot has memory entries
 0      slot has function type entries
SeeAlso: #00538
--------X-15D801-----------------------------
INT 15 - EISA SYSTEM ROM - READ FUNCTION CONFIGURATION INFORMATION
        AX = D801h
        CH = function number to read
        CL = slot number (including embedded and virtual)
        DS:SI -> 320-byte buffer for standard configuration data block
Return: CF clear if successful
            AH = 00h
            DS:SI buffer filled
        CF set on error
            AH = error code (80h-83h,86h,87h) (see #00539)
        BX destroyed
Note:   call with AL=81h if using 32-bit CS addressing mode instead of 16-bit
--------X-15D802-----------------------------
INT 15 - EISA SYSTEM ROM - CLEAR NONVOLATILE MEMORY (EISA CMOS)
        AX = D802h
        BH = EISA config utility major revision level
        BL = EISA config utility minor revision level
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = error code (84h,86h,88h) (see #00539)
Note:   call with AL=82h if using 32-bit CS addressing mode instead of 16-bit
SeeAlso: AX=D803h
--------X-15D803-----------------------------
INT 15 - EISA SYSTEM ROM - WRITE NONVOLATILE MEMORY
        AX = D803h
        CX = length of data structure (0000h = empty slot)
                includes two bytes for config file checksum
        DS:SI -> configuration data
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = error code (84h-86h) (see #00539)
Note:   call with AL=83h if using 32-bit CS addressing mode instead of 16-bit
SeeAlso: AX=D802h
--------X-15D804-----------------------------
INT 15 - EISA SYSTEM ROM - READ PHYSICAL SLOT
        AX = D804h
        CL = slot number (including embedded and virtual)
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = error code (80h,83h,86h) (see #00539)
        SI:DI = 4-byte compressed ID (DI = bytes 0&1, SI = bytes 2&3)
Note:   call with AL=84h if using 32-bit CS addressing mode instead of 16-bit
SeeAlso: AX=D800h
--------b-15D820-----------------------------
INT 15 - Compaq LTE Lite - GET ???
        AX = D820h
        DS:SI -> 17-byte buffer for ???
Return: DS:SI buffer filled (first byte is length of remaining data, unless
          it is greater than 10h, in which case the second byte is 00h and no
          other data is returned)
Note:   this function is also supported by Compaq's EISA System ROM, Contura
          486/486c/486cx and recent DESKPRO/i ROMs
SeeAlso: AX=D821h
--------b-15D821-----------------------------
INT 15 - Compaq LTE Lite - SET ???
        AX = D821h
        DS:SI -> counted string (should not be more than 16 bytes)
Return: AH = 00h
Note:   this function is also supported by Compaq's EISA System ROM, Contura
          486/486c/486cx and recent DESKPRO/i ROMs
SeeAlso: AX=D820h
--------b-15D822BL00-------------------------
INT 15 - Compaq EISA System ROM 04/08/93 - GET ???
        AX = D822h
        BL = 00h
        CX = size of buffer or 0000h to retrieve required buffer size
        DS:SI -> buffer for ??? (if CX nonzero)
Return: CF clear if successful
            AH = 00h
            DH = 08h
            CX = required buffer size to retrieve all data (if CX=0 on entry)
            DS:SI buffer filled (if CX nonzero on entry)
        CF set on error (BL nonzero)
            AH = 86h
--------b-15D823-----------------------------
INT 15 - Compaq EISA System ROM 04/08/93 - ???
        AX = D823h
        BL = subfunction??? (00h or 80h)
        BH = ???
        DS:SI -> buffer for ??? (see #00541)
Return: CF clear if successful
            AH = 00h
            DH = 08h
            DL = ???
        CF set on error
            AH = error code
                86h BL neither 00h nor 80h
                87h ???

Format of Compaq EISA buffer:
Offset  Size    Description     (Table 00541)
 00h    BYTE    ???
 01h    WORD    ???
 03h    BYTE    ???
 04h    WORD    ???
 06h    WORD    ???
        ???
----------15D824-----------------------------
INT 15 - Compaq EISA System ROM 04/08/93 - ???
        AX = D824h
        CX = ???
        DS:SI -> ASCIZ string containing ???
Return: CF clear if successful
            AH = 00h
            CX = ???
        CF set on error
            AH = error code
                87h ??? failed
                88h ???
Note:   these functions are only available if ??? from keyboard controller
          command C0h
----------15D825-----------------------------
INT 15 - Compaq EISA System ROM 04/08/93 - ???
        AX = D825h
        CX = ???
        SI = ???
        DI = ???
        ???
Return: CF clear if successful
            AH = 00h
            CX = ???
        CF set on error
            AH = error code
                87h ??? failed
                88h ???
                    CX = ???
Note:   these functions are only available if ??? from keyboard controller
          command C0h
----------15D826-----------------------------
INT 15 - Compaq EISA System ROM 04/08/93 - ???
        AX = D826h
        BX = ???
        CX = size of buffer in bytes
        DS:SI -> buffer for ???
        ???
Return: CF clear if successful
            AH = 00h
            CX = ???
        CF set on error
            AH = error code
                87h ??? failed
                88h ???
Note:   these functions are only available if ??? from keyboard controller
          command C0h
--------X-15D8-------------------------------
INT 15 - EISA SYSTEM ROM - 32-bit CS ADDRESSING MODE CALLS
        AH = D8h
        AL = 80h to 84h
        other registers as appropriate for AL=00h to 04h
Return: as appropriate for AL=00h to 04h
Note:   these functions are identical to AX=D800h to D804h, except that they
          should be called when using 32-bit CS addressing mode (pointers use
          ESI rather than SI as offset) instead of 16-bit addressing mode
SeeAlso: AX=D800h,AX=D801h,AX=D802h,AX=D803h,AX=D804h
--------b-15D8-------------------------------
INT 15 - Compaq EISA System ROM 04/08/93 - 32-bit CS ADDRESSING MODE CALLS
        AH = D8h
        AL = A0h to A6h
        other registers as appropriate for AL=20h to 26h
Return: as appropriate for AL=20h to 26h
Note:   these functions are identical to AX=D820h to D826h, except that they
          should be called when using 32-bit CS addressing mode
----------15DA-------------------------------
INT 15 U - AMI PCI BIOS v1.00.05.AX1 - ???
        AH = DAh
        AL = function (00h-08h,12h,14h,15h,19h,88h-8Eh,92h,99h)
        other registers vary by function
Return: CF clear if successful
            varies by function
        CF set on error
            AH = error code (86h unsupported [sub]function)
Note:   functions not listed above always return CF set and AH=86h; in the
          examined BIOS, functions 02h-04h,06h-07h,89h-8Bh, and 8Dh also
          always return CF set and AH=86h
SeeAlso: AX=DA00h,AX=DA01h,AX=DA88h,AX=DA99h,AX=DB00h
--------b-15DA00-----------------------------
INT 15 U - AMI PCI BIOS - ???
        AX = DA00h
        CL = subfunction
            00h ???
            01h ???
            02h get ???
        ???
Return: CF clear if successful
            ???
        CF set on error
            AH = error code (86h unsupported subfunction)
Note:   in the v1.00.05.AX1 BIOS, subfunctions 00h and 01h always return
          failure
SeeAlso: AX=DA01h
--------b-15DA01-----------------------------
INT 15 U - AMI PCI BIOS - CPU SPEED CONTROL
        AX = DA01h
        CL = subfunction (00h-02h)
            00h set low CPU speed
            01h set high CPU speed
            02h get current CPU speed
Return: CF clear if successful
            AH = current/new CPU speed (00h low, 01h high)
            AL = ??? (00h)
        CF set on error
            AH = error code (86h unsupported subfunction)
Notes:  in the v1.00.05.AX1 BIOS, subfunctions 00h and 01h are NOPs in both
          protected and V86 modes due to a test of MSW bit 0
        setting the CPU speed also generates the same audible signals generated
          when manually switching speeds with Ctrl-Alt-Gray- and Ctrl-Alt-Gray+
BUG:    the BIOS apparently intends to return CF set if ???, but fails to use
          a different exit path in that case, resulting in CF clear
----------15DA05-----------------------------
INT 15 U - AMI PCI BIOS - GET ??? AND BIOS REVISION STRINGS
        AX = DA05h
        ES:SI -> 8-byte buffer for ??? and BIOS revision strings
Return: CF clear
        ES:SI buffer filled
        AL = 00h
        CX = ??? (0000h)
Notes:  for BIOS v1.00.05.AX1, the ??? string is "IDNO" and the BIOS revision
          string is "AX1 "
SeeAlso: AX=DA15h,AX=DB04h
----------15DA08-----------------------------
INT 15 U - AMI PCI BIOS - ???
        AX = DA08h
        ???
Return: CF clear if successful
            ???
        CF set on error
            AH = error code (86h unsupported subfunction)
Note:   in the examined v1.00.05.AX1 BIOS, this call always returns failure
----------15DA12-----------------------------
INT 15 U - AMI PCI BIOS - v1.00.05.AX1 - ???
        AX = DA12h
        CL = subfunction
            00h ???
            01h ???
            02h get ???
            03h ???
            04h ???
        ???
Return: CF clear if successful
            ???
        CF set on error
            AH = error code (86h unsupported subfunction)
Desc:   ??? performs various manipulations on system chipset registers
Notes:  subfunctions 00h and 01h are NOPs in protected and V86 modes due to
          a test of MSW bit 0
        subfunctions 00h-02h always return success
----------15DA14-----------------------------
INT 15 U - AMI PCI BIOS - GET/SET ???
        AX = DA14h
        CL = subfunction
            00h read
            01h write
                DH = new value for ??? (00h-02h)
        DL = index of ??? (00h-03h, but not range-checked)
        ???
Return: CF clear if successful
            DH = current value of ??? if reading
        CF set on error
            AH = error code (86h unsupported subfunction)
Note:   the values for indexes 00h and 01h are stored in CMOS RAM location 19h,
          and the values for 02h and 03h are stored in location 36h
BUG:    the v1.00.05.AX1 BIOS range-checks DH on subfunction 00h instead of
          subfunction 01h, even though DH is never used by subfunction 00h
----------15DA15-----------------------------
INT 15 U - AMI PCI BIOS - GET ??? AND BIOS REVISION STRINGS
        AX = DA15h
        ES:DI -> 8-byte buffer for ??? and BIOS revision strings
Return: CF clear
        ES:DI buffer filled
        AL = 00h
Note:   for BIOS v1.00.05.AX1, the ??? string is "IDNO" and the BIOS revision
          string is "AX1 "
SeeAlso: AX=DA05h,AX=DB04h
----------15DA19-----------------------------
INT 15 U - AMI PCI BIOS - GET/SET ???
        AX = DA19h
        CL = subfunction
            00h get first ???
            01h get second ???
            02h set first ???
                BX = ???
                DX = ???
            03h set second ???
                BX = ???
                DX = ???
Return: CF clear if successful
            AX = 0000h
            BX,DX = ??? (subfunctions 00h and 01h only)
        CF set on error
            AH = error code (86h unsupported subfunction)
Note:   the first ??? is stored in CMOS RAM locations 1Bh-1Eh, the second in
          locations 1Fh-22h in the v1.00.05.AX1 BIOS
--------b-15DA20-----------------------------
INT 15 U - AMI PCI BIOS v1.00.12.AX1T - CMOS RAM BITFIELD MANIPULATION
        AX = DA20h
        BL = subfunction
            00h set CMOS data field
                BH = CMOS data field number (00h-4Dh)
                CH = new value for bitfield (in lowest bits of register)
            01h read CMOS data field
                BH = CMOS data field number (00h-4Dh)
                Return: CH = value of bitfield
                        CL = mask of valid bits
                Note:   both CL/CH shifted to move valid bits into lowest pos
            02h set CMOS byte
                CL = CMOS RAM address (00h-7Fh)
                CH = new value for CMOS byte
            03h get CMOS byte
                CL = CMOS RAM address (00h-7Fh)
                Return: CH = value of CMOS byte
            04h update CMOS checksums
                Note:   sets 2Eh/2Fh to checksum of 10h-2Dh and 7Eh/7Fh to
                          checksum of 48h-7Dh
            05h verify CMOS checksums
                Return: CF clear if checksums OK
                            AH = 00h
                        CF set if checksum mismatch
                            AH = 01h
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = error code (86h unsupported function/data field)
Notes:  this function was not supported by the v1.00.05.AX1 BIOS, but had been
          added by 1.00.12.AX1T
        after using subfunctions 00h or 02h, the application must call
          subfunction 04h to update the checksums to prevent an error the next
          time the system is booted

(Table 00542)
Values for AMI BIOS v1.00.12.AX1T CMOS bitfield identifier:
 ID     address bit(s)  contents
 00h    1Ah     7-6
 01h    1Dh     7-6
 02h    6Eh     1
 03h    77h     0
 04h    77h     1
 05h    77h     2
 06h    77h     3
 07h    77h     5
 08h    77h     6
 09h    77h     7
 0Ah    78h     7       power management enabled???
 0Bh    78h     6
 0Ch    10h     7-4     first floppy drive type
 0Dh    10h     3-0     second floppy drive type
 0Eh    11h     7
 0Fh    20h     4-0     selected language for error messages/setup utility
 10h    11h     2-1
 11h    11h     4
 12h    11h     0
 13h    11h     3
 14h    13h     7
 15h    13h     6-5
 16h    13h     4-2
 17h    19h     7
 18h    19h     6
 19h    19h     5
 1Ah    19h     4
 1Bh    1Eh     2-0
 1Ch    1Bh     7-6
 1Dh    1Ch     7
 1Eh    1Ch     3
 1Fh    1Ah     5-4
 20h    1Dh     5-4
 21h    1Bh     5-4
 22h    1Ch     6
 23h    1Ch     2
 24h    1Ah     3-2
 25h    1Dh     3-2
 26h    1Bh     3-2
 27h    1Ch     5
 28h    1Ch     1
 29h    1Ah     1-0
 2Ah    1Dh     1-0
 2Bh    1Bh     1-0
 2Ch    1Ch     4
 2Dh    1Ch     0
 2Eh    50h     7-0
 2Fh    51h     7-0
 30h    52h     7-0
 31h    53h     7-0
 32h    60h     0
 33h    60h     0
 34h    60h     0
 35h    60h     0
 36h    60h     0
 37h    60h     0
 38h    60h     1
 39h    61h     7
 3Ah    60h     2
 3Bh    61h     6-4
 3Ch    61h     2-0
 3Dh    60h     7-6
 3Eh    60h     5-4
 3Fh    78h     5-4
 40h    6Eh     5
 41h    1Eh     3
 42h    6Eh     0
 43h    6Eh     2
 44h    6Fh     1-0
 45h    6Fh     1-0
 46h    28h     4-2
 47h    28h     7-5
 48h    6Eh     4
 49h    6Eh     3
 4Ah    76h     7-0
 4Bh    77h     4
 4Ch    11h     6
 4Dh    1Fh     7-0
----------15DA88-----------------------------
INT 15 U - AMI PCI BIOS - GET EXTENDED MEMORY SIZE
        AX = DA88h
Return: CF clear (successful)
        AX = 0000h
        CL:BX = extended memory size in KBytes
SeeAlso: AH=88h
----------15DA8C-----------------------------
INT 15 U - AMI PCI BIOS - GET BIOS AND CHIPSET IDENTIFICATION
        AX = DA8Ch
        CL = subfunction
            00h get BIOS version string
                ES:DI -> 12-byte buffer for version string
            01h get chipset identification
                BL = what to retrieve
                    (00h host/PCI bridge,01h motherboard chipset)
                ES:DI -> 12-byte buffer for chipset identification (see #00543)
Return: CF clear if successful
            ES:DI buffer filled
        CF set on error
            AH = error code (86h unsupported subfunction)
Notes:  the v1.00.05.AX1 BIOS returns "1.00.05.AX1 " as its version string
        subfunction 01h returns the five bytes read from the PCI configuration
          registers 00h-05h (see #00878), padded to 12 bytes with NULs
SeeAlso: AX=DB04h,PORT C000h"Neptune"

Format of AMI PCI BIOS chipset identification:
Offset  Size    Description     (Table 00543)
 00h    WORD    vendor ID (see #00732 at AX=B102h)
                8086h = Intel
 02h    WORD    device ID
                0484h (BL=01h)
                04A3h (BL=00h)
 04h    BYTE    low byte of PCI Command Register
 05h  7 BYTEs   unused (00h)
----------15DA8E-----------------------------
INT 15 U - AMI PCI BIOS - ???
        AX = DA8Eh
        ???
Return: CF clear if successful
            ???
        CF set on error
            AH = error code (86h unsupported subfunction)
Note:   in the  v1.00.05.AX1 BIOS, this call always returns failure
----------15DA92-----------------------------
INT 15 U - AMI PCI BIOS - GET CPU TYPE AND SPEED
        AX = DA92h
Return: CF clear (successful)
        AL = CPU stepping (see also #00529 at INT 15/AH=C9h)
        AH = CPU model
        BL = CPU family (05h = Pentium, etc.)
        CX = external clock speed in MHz (BCD)
            (0040h,0050h,0060h,0066h are possible return values on my
              Pentium with the Intel "Neptune" chipset)
        EAX high word destroyed
Note:   90 MHz and faster Pentium CPUs can be configured to run at varying
          multiples of the external clock speed, i.e. a typical 90 MHz Pentium
          system will run the motherboard at 60 MHz (my 90 MHz Pentium returns
          0060h in CX)
SeeAlso: AH=C9h
----------15DA99-----------------------------
INT 15 U - AMI PCI BIOS - GET/SET ??? FLAG
        AX = DA99h
        CL = subfunction
            00h check if ???
            01h set ??? flag
            02h clear ??? flag
Return: CF clear if successful
            AH = ??? (00h,01h)
            AL = 00h
        CF set on error
            AH = error code (86h unsupported subfunction)
Note:   the flag is stored in bit 0 of CMOS RAM location 2Ch for BIOS
          v1.00.05.AX1
--------b-15DB00-----------------------------
INT 15 U - AMI BIOS - Flash ROM - READ FLASH BIOS
        AX = DB00h
        DS:SI -> parameter block (see #00544)
        ES:DI -> buffer for copied information
Return: CF clear if successful
        CF set on error
            AH = status (86h if not implemented)
        DS,ES destroyed, possibly other registers
Note:   used by FMUP.EXE, Intel's Flash Memory Update utility
SeeAlso: AH=DAh,AX=DB01h,AX=DB04h

Format of AMI BIOS Flash ROM parameter block:
Offset  Size    Description     (Table 00544)
 00h 32 BYTEs   ASCIZ description of the file's contents
 20h    BYTE    Logical area type (see #00545)
 21h    DWORD   logical area size (overall size of area)
 25h    BYTE    flag: load from file (FF=yes, 00=no)
 26h    BYTE    flag: reboot after update (FF=yes, 00=no)
 27h    BYTE    flag: update entire image (FF=yes, 00=no)
 28h 24 BYTEs   ASCIZ logical area name (cooresponds to offset 20)
                "System BIOS"
                "Logo Data Area", etc.
 40h 15 BYTEs   ASCIZ time stamp string: MM/DD/YY-HH:MM
 4Fh    BYTE    checksum for this header (sum of all bytes except this one)
                if checksum would be 00h,01h, or FFh, it is set to 2Ah
 50h    DWORD   this file's starting address (offset in image)
 54h    DWORD   size of image chunk in this file
 58h    BYTE    logical area type - same as offset 20h
 59h    BYTE    flag: last file in chain (FF=yes, 00=no)
 5Ah  6 BYTEs   ASCIZ signature "FLASH"
 60h 16 BYTEs   ASCIZ filename of next file in chain
 70h 16 BYTEs   ASCIZ BIOS reserved string (usually version #)
Notes:  this block is identical in format to the 128-byte header on an AMI
          BIOS Update file
        for AX=DB00h, the following fields must be specified: 50h,54h,58h;
          the fields at offset 20h and 5Ah should also be set if possible
        the fields at offsets 40h and 70h will be set on return, if available
SeeAlso: #00546
--------b-15DB01-----------------------------
INT 15 U - AMI BIOS - Flash ROM - GET BIOS SUBSYSTEM INFORMATION
        AX = DB01h
        CL = BIOS subsystem information identifier (see #00545)
Return: CF clear if successful
            AX = 0000h
            ES:DI -> 56-byte record describing subsystem (see #00546)
        CF set on error
            AH = status
                01h nonexistent subsystem
                86h function not supported
            AL = 00h
Note:   used by FMUP.EXE, Intel's Flash Memory Update utility
SeeAlso: AX=DB00h,AX=DB02h

(Table 00545)
Values for AMI BIOS subsystem identifier:
 00h    recovery code
 01h    system BIOS
 02h    PCI configuration data
 03h    OEM logo data area (see #00547)
 04h    system BIOS/Language Set (one system)
        configuration utility (another system)
SeeAlso: #00546

Format of AMI BIOS subsystem information:
Offset  Size    Description     (Table 00546)
 00h    BYTE    subsystem identifier/logical area type (see #00545)
 01h    DWORD   subsystem (FlashROM page) size in bytes
 05h    BYTE    flag: loadable from file (FFh=yes)
 06h    BYTE    flag: reboot after update (FFh=yes)
 07h    BYTE    flag: update entire image (FFh=yes)
 08h 24 BYTEs   subsystem/logical area name
 20h    BYTE    subsystem identifier???
 21h    BYTE    flag: reprogrammable if FFh
 22h    BYTE    ??? (01h,02h seen)
 23h  5 BYTEs   ??? (apparently always 00h)
 28h 16 BYTEs   BIOS reserved string (usually version number)
SeeAlso: #00544

Format of AMI OEM Logo data area:
Offset  Size    Description     (Table 00547)
 00h  8 BYTEs   signature
                "TEXTLOGO" if text-mode OEM logo
                8 DUP (FFh) if unused
 08h    WORD    offset of logo font definition table
 0Ah    WORD    offset of logo data
 0Ch    WORD    size of logo font table in words
 0Eh    WORD    offset of upper left corner of logo in video page
 10h    WORD    width of logo
 12h    WORD    height of logo
 14h    BYTE    reserved???
 var    var     logo font definition (16 bytes per character)
 var    var     logo data as character/attribute pairs
Note:   the attribute for the logo characters specifies which font will be used
          for that character.  If bit 3 is cleared, the normal system font is
          used; if bit 3 is set, the logo font is used, with screen colors
          adjusted to match the corresponding non-bright attribute for the
          system font
SeeAlso: #00545,#00546
--------b-15DB02-----------------------------
INT 15 U - AMI BIOS - Flash ROM - GET SIZE OF FLASH ROM PROGRAMMING CODE
        AX = DB02h
Return: CF clear
        AX = 0000h
        BX = size of ROM programming code in bytes
Note:   used by FMUP.EXE, Intel's Flash Memory Update utility
SeeAlso: AX=DB00h,AX=DB03h
--------b-15DB03-----------------------------
INT 15 U - AMI BIOS - Flash ROM - GET FLASH ROM PROGRAMMING CODE
        AX = DB03h
        DS:SI -> ???
        ES:DI -> buffer for Flash ROM programming code
        BX = ???
        DX = ???
Return: CF clear if successful
            AH = ???
            BX = ???
            DX = ???
        CF set on error
            AH = error code
Notes:  the entry point for the copied code (which is fully relocatable) is
          the very first byte (see #00548)
        used by FMUP.EXE, Intel's Flash Memory Update utility
SeeAlso: AX=DB00h,AX=DB02h

(Table 00548)
Call AMI BIOS ??? code with:
        AL = function
            00h erase Flash ROM block
                CX = ???
                        bit 8: address line A16 inverted
                ???
            01h program new data into Flash ROM
                ???
            02h perform cold reboot
        DS:SI -> ??? (see #00549)
        ES:DI -> ???
Return: AH = status
            00h successful
            01h invalid function
            02h ???
            03h ???
            04h ???
Note:   DS:SI and ES:DI are ignored for function 02h

Format of AMI BIOS Flash ROM programming parameters:
Offset  Size    Description     (Table 00549)
 00h 32 BYTEs   ???
 20h    BYTE    BIOS section number
 21h    DWORD   length of BIOS code/data in bytes
 25h 43 BYTEs   ???
 50h    DWORD   ???
 54h 44 BYTEs   ???
SeeAlso: #00548
--------b-15DB04-----------------------------
INT 15 U - AMI BIOS - Flash ROM - GET BIOS REVISION
        AX = DB04h
Return: CF clear if supported
            BL:BH:DL:DH = BIOS revision string
                (e.g. 'AX1 ' for v1.00.05.AX1, 'AV0M' for v1.00.03.AV0M)
            CL = flag: DH valid?
                00h ignore DH; ignore DL as well if 20h (space)
                01h ignore DH if 20h (space)
            CH = BIOS status
                00h normal mode
                01h ROM recovery mode
            AL = ??? (02h)
Note:   used by FMUP.EXE, Intel's Flash Memory Update utility
SeeAlso: AX=DA05h,AX=DA15h,AX=DA8Ch,AX=DB00h,AX=DB03h
--------Q-15DE00-----------------------------
INT 15 - DESQview - GET PROGRAM NAME
        AX = DE00h
Return: AX = offset into DESQVIEW.DVO of program most recently selected from
              the "Switch Windows" menu (see #00550)
Note:   always returns AX=0000h under DESQview/X
SeeAlso: AX=DE07h

Format of program entry in DESQVIEW.DVO:
Offset  Size    Description     (Table 00550)
 00h    BYTE    length of name (FFh if end of file)
 01h  N BYTEs   name
      2 BYTEs   keys to invoke program (second = 00h if only one key used)
        BYTE    program type
                00h normal program
                04h divider
                80h Delete a Program
                81h Change a Program
        WORD    ??? apparently always 0000h
--------Q-15DE01-----------------------------
INT 15 - DESQview - UPDATE "OPEN WINDOW" MENU
        AX = DE01h
Return: nothing
Notes:  reads DESQVIEW.DVO, disables Open menu if file not in current directory
        NOP for DESQview/X
--------Q-15DE02-----------------------------
INT 15 - DESQview 1.x only - SET ??? FLAG FOR CURRENT WINDOW
        AX = DE02h
Return: nothing
Note:   this call is a NOP in DV 2.x
SeeAlso: AX=DE03h
--------Q-15DE03-----------------------------
INT 15 - DESQview 1.x only - GET ??? FOR CURRENT WINDOW
        AX = DE03h
Return: AX = ??? for current window
        BX = ??? for current window
Note:   this call is a NOP in DV 2.x
SeeAlso: AX=DE02h
--------Q-15DE04-----------------------------
INT 15 - DESQview - GET AVAILABLE COMMON MEMORY
        AX = DE04h
Return: BX = bytes of common memory available
        CX = largest block available
        DX = total common memory in bytes
SeeAlso: AX=DE05h,AX=DE06h
--------Q-15DE05-----------------------------
INT 15 - DESQview - GET AVAILABLE CONVENTIONAL MEMORY
        AX = DE05h
Return: BX = KB of memory available
        CX = largest block available
        DX = total conventional memory in KB
SeeAlso: AX=DE04h,AX=DE06h
--------Q-15DE06-----------------------------
INT 15 - DESQview - GET AVAILABLE EXPANDED MEMORY
        AX = DE06h
Return: BX = KB of expanded memory available
        CX = largest block available
        DX = total expanded memory in KB
SeeAlso: AX=DE04h,AX=DE05h
--------Q-15DE07-----------------------------
INT 15 - DESQview - "APPNUM" - GET CURRENT PROGRAM'S NUMBER
        AX = DE07h
Return: AX = number of program as it appears on the "Switch Windows" menu
Note:   this API call may be made from a hardware interrupt handler
SeeAlso: AX=DE00h
--------Q-15DE08-----------------------------
INT 15 - DESQview - GET ???
        AX = DE08h
Return: AX = 0000h if ??? is not set to the current task
             0001h if ??? is set to the current task
--------Q-15DE09-----------------------------
INT 15 - DESQview - UNIMPLEMENTED
        AX = DE09h
Return: nothing (NOP in DV 1.x and 2.x)
--------Q-15DE0A-----------------------------
INT 15 - DESQview v2.00+ - "DBGPOKE" - DISPLAY CHARACTER ON STATUS LINE
        AX = DE0Ah
        BL = character
Return: character displayed, next call will display in next position (which
        wraps back to the start of the line if off the right edge of screen)
Notes:  displays character on bottom line of *physical* screen, regardless
          of current size of window (even entirely hidden)
        does not know about graphics display modes, just pokes the characters
          into display memory
        this API call may be made from a hardware interrupt handler
SeeAlso: AX=1003h
--------Q-15DE0B-----------------------------
INT 15 - DESQview v2.00+ - "APILEVEL" - DEFINE MINIMUM API LEVEL REQUIRED
        AX = DE0Bh
        BL = API level minor version number
        BH = API level major version number
Return: AX = maximum API level (AH = major, AL = minor)
Notes:  if the requested API level is greater than the version of DESQview, a
          "You need a newer version" error window is popped up
        the API level defaults to 1.00, and is inherited by child tasks
--------Q-15DE0C-----------------------------
INT 15 - DESQview v2.00+ - "GETMEM" - ALLOCATE "SYSTEM" MEMORY
        AX = DE0Ch
        BX = number of bytes
Return: ES:DI -> allocated block or 0000h:0000h (DV 2.26+)
Note:   use SETERROR (AX=DE15h) to avoid a user prompt if there is insufficient
          system memory
SeeAlso: AX=1001h,AX=102Eh,AX=DE0Dh,AX=DE15h,AX=DE19h
--------Q-15DE0D-----------------------------
INT 15 - DESQview v2.00+ - "PUTMEM" - DEALLOCATE "SYSTEM" MEMORY
        AX = DE0Dh
        ES:DI -> previously allocated block
Return: nothing
SeeAlso: AX=1002h,AX=DE0Ch
--------Q-15DE0E-----------------------------
INT 15 - DESQview v2.00+ - "FINDMAIL" - FIND MAILBOX BY NAME
        AX = DE0Eh
        ES:DI -> name to find (see #00551)
        CX = length of name
Return: BX = 0000h not found
             0001h found
                DS:SI = object handle
SeeAlso: AH=12h/BH=11h,AH=12h/BH=12h"GETNAME"

(Table 00551)
Values for special DESQview mailbox names:
 "COM1" ... "COM4"      RBcomm using COM1 ... COM4
 "DESQview/X Help Engine"
 "DESQview/X Network Server"  Network Manager
 "DESQview X Server0"   X-Windows server
 "DESQview X Server7"   X-Windows printing service
 "INBOX"                DESQview/X LPD requests
 "OUTBOX"               DESQview/X LPD responses
 "WAITBOX"              semaphore to synchronize DESQview/X LPD communications
 "_DVNM_"               DV/X v1.10 network manager
--------Q-15DE0F-----------------------------
INT 15 - DESQview v2.00+ - ENABLE DESQview EXTENSIONS
        AX = DE0Fh
Return: AX and BX destroyed (seems to be bug, weren't saved&restored)
Notes:  sends a manager stream with opcodes AEh, BDh, and BFh to task's window
        enables an additional mouse mode
--------Q-15DE10-----------------------------
INT 15 - DESQview v2.00+ - "PUSHKEY" - PUT KEY INTO KEYBOARD INPUT STREAM
        AX = DE10h
        BH = scan code
        BL = character
Return: nothing
Notes:  a later read will get the keystroke as if it had been typed by the user
        multiple pushes are read last-in first-out
        if a script exists for the pushed key in the current application, the
          script will be executed
        early copies of DV 2.00 destroy AX, BX, ES, and DI
SeeAlso: INT 16/AH=05h
--------Q-15DE11BL00-------------------------
INT 15 - DESQview v2.00+ - "JUSTIFY" - EN/DISABLE AUTOM. WINDOW JUSTIFICATION
        AX = DE11h
        BL = 00h      viewport will not move automatically
             nonzero  viewport will move to keep cursor visible (default)
Return: nothing
--------Q-15DE12BX0000-----------------------
INT 15 - DESQview v2.01+ - "CSTYLE" - SET "C"-COMPATIBLE CONTROL CHAR INTERPRET
        AX = DE12h
        BX = 0000h    select normal style (linefeed only moves down)
             nonzero  select C style (linefeed moves to start of next line)
Return: nothing
Note:   set on a per-task basis, and inherited from the parent task
--------Q-15DE13-----------------------------
INT 15 - DESQview v2.20+ - "GETCRIT" - GET CRITICAL NESTING COUNT
        AX = DE13h
Return: BX = number of calls to BEGINC or ENTERC
              (see INT 15/AX=101Bh,INT 15/AX=DE1Ch) without matching ENDC
              (see INT 15/AX=101Ch)
Note:   this API call may be made from within a hardware interrupt handler
SeeAlso: AX=101Bh,AX=101Ch,AX=DE1Bh,AX=DE1Ch
--------Q-15DE14-----------------------------
INT 15 - DESQview v2.20+ - GET OBJECT TYPE
        AX = DE14h
        ES:DI -> object
Return: BL = 00h not an object
             08h window or task
             09h mailbox
             0Ah keyboard
             0Bh timer
             0Ch objectq
             0Fh pointer
             10h panel
SeeAlso: AX=1016h
--------Q-15DE15-----------------------------
INT 15 - DESQview v2.20+ - SET ERROR HANDLING
        AX = DE15h
        BL = error handling mode
            00h post system error on all error conditions
            01h return carry flag set on calls to ADDTO, SUBFROM, and WRITE
                messages sent to mailboxes which fail due to lack of system
                or common memory
            02h (v2.26+) same as 01h, but also return null pointer for GETMEM
                calls which fail due to lack of system memory
Return: nothing
SeeAlso: AX=DE0Ch,AX=DE16h
--------Q-15DE16-----------------------------
INT 15 - DESQview v2.20+ - GET ERROR HANDLING
        AX = DE16h
Return: BL = current mode
            00h always post system error
            01h return carry flag set on failed mailbox writes
            02h return CF set on failed mailbox writes and NULL on failed
                GETMEM calls
SeeAlso: AX=DE15h
--------Q-15DE17-----------------------------
INT 15 - DESQview v2.20-2.25 - reserved
        AX = DE17h
Return: pops up "Programming error" window
Note:   AX = 1117h is NOT identical to this call under DESQview 2.20 thru 2.25
SeeAlso: AX=1117h
--------Q-15DE17-----------------------------
INT 15 - DESQview v2.26+ - "ASSERTMAP" - GET/SET MAPPING CONTEXT
        AX = DE17h
        BX = function
            0000h   get current mapping context without setting
            nonzero set new mapping context to BX
Return: BX = mapping context in effect before call
Notes:  mapping contexts determine conventional-memory addressability; setting
          a mapping context ensures that the associated program and data areas
          are in memory for access.  Usable by drivers, TSRs and shared
          programs.
        caller need not be running under DESQview
        this API call may be made from a hardware interrupt handler
SeeAlso: AX=1016h,AX=1117h,AX=DE21h,INT 2F/AX=1685h
--------Q-15DE18-----------------------------
INT 15 - DESQview v2.20+ - internal - ???
        AX = DE18h
        BP = function number
            high byte must be 10h
            low byte is function
                00h set ???
                    BL = ???  (00h-10h, video mode???)
                    BH = value to store
                03h set ???
                    BL = ??? (stored in driver)
                0Ah get ???
                    ES:DI -> 18-byte buffer to hold ???
Note:   calls video driver (NOP for Hercules driver,probably CGA and MCGA also)
--------Q-15DE19-----------------------------
INT 15 - DESQview v2.23+ - "GETCOMMON" - ALLOCATE "COMMON" MEMORY
        AX = DE19h
        BX = number of bytes to allocate
Return: AX = 0000h successful
                ES:DI -> allocated block
             nonzero insufficient memory
Note:   this API call may be made from within a hardware interrupt handler
SeeAlso: AX=DE0Ch,AX=DE15h,AX=DE1Ah
--------Q-15DE1A-----------------------------
INT 15 - DESQview v2.23+ - "PUTCOMMON" - DEALLOCATE "COMMON" MEMORY
        AX = DE1Ah
        ES:DI -> previously allocated block
Return: AX = 0000h (successful)
Note:   this function may be called from within a hardware interrupt handler
SeeAlso: AX=DE0Dh,AX=DE19h
--------Q-15DE1B-----------------------------
INT 15 - DESQview v2.23+ internal - DECREMENT CRITICAL NESTING COUNT
        AX = DE1Bh
Return: nothing
SeeAlso: AX=101Ch,AX=DE13h,AX=DE1Ch
--------Q-15DE1C-----------------------------
INT 15 - DESQview v2.23+ - "ENTERC" - INCREMENT CRITICAL NESTING COUNT
        AX = DE1Ch
Return: nothing
Notes:  similar to AX=101Bh, but begins the critical region without ensuring
          that DOS is free
        the official documentation states that this call should be paired with
          "ENDC" (AX=101Ch); no mention is made of AX=DE1Bh
        this API call may be made from within a hardware interrupt handler
SeeAlso: AX=101Bh,AX=101Ch,AX=DE13h,AX=DE1Bh
--------Q-15DE1D-----------------------------
INT 15 - DESQview v2.23+ - "PUTKEY" - FAKE USER KEYSTROKES
        AX = DE1Dh
        DX = segment of handle for task to receive keystroke
        BL = character
        BH = scan code
Return: AX = 0000h if successful
           nonzero if receiver's keyboard buffer was full
Notes:  the key is treated as though the user had pressed it, ignoring any
          script which may be bound to the key, and using the current field
          table if the keyboard object is in field processing mode
        multiple PUTKEYs are seen in the order in which they are executed
SeeAlso: AX=DE10h
--------Q-15DE1E-----------------------------
INT 15 - DESQview v2.23+ - "SCRNINFO" - GET TRUE VIDEO PARAMETERS
        AX = DE1Eh
Return: CL = actual number of rows on screen
        CH = actual number of columns on screen
        BL = actual video mode (may differ from INT 10/AH=0Fh return) (v2.26+)
Note:   this API call may be made from a hardware interrupt handler
SeeAlso: INT 10/AH=0Fh
--------Q-15DE1F-----------------------------
INT 15 - DESQview v2.23+ - "DOSUSER" - GET HANDLE OF TASK CURRENTLY USING DOS
        AX = DE1Fh
Return: BX = segment of task handle or 0000h if no tasks are using DOS
Note:   this API call may be made from within a hardware interrupt handler
SeeAlso: AX=DE13h,INT 21/AH=34h
--------Q-15DE20-----------------------------
INT 15 - DESQview v2.26+ - "DISPATCHINT" - INTERRUPT ANOTHER TASK
        AX = DE20h
        BX = segment of handle of task to interupt
        DX:CX -> FAR interrupt routine
        BP,SI,DI,DS,ES as required by interrupt routine
Return: nothing
Notes:  unlike "PGMINT" (AX=1021h), DISPATCHINT may be applied to the task
          making the DISPATCHINT call
        multiple "DISPATCHINT" calls are processed in the order in which they
          were executed
        the FAR routine is entered with the current ES, DS, SI, DI, and BP
          values, using the task's internal stack (see AX=101Ah); only SS:SP
          needs to be preserved
        this API call may be made from within a hardware interrupt handler
SeeAlso: AX=1021h,AX=DE2Ah
--------Q-15DE21-----------------------------
INT 15 - DESQview v2.26+ - "ASSERTVIR" - CONTROL 386 SCREEN VIRTUALIZATION
        AX = DE21h
        BX = new state
            0000h turn off
            nonzero turn on
Return: BX = old state of virtualization
Notes:  this API call may be made from within a hardware interrupt handler
        under DV 2.40 and 2.42, this call appears to have no effect and always
          returns a nonzero value in BX which appears to be the offset within
          the DV common memory segment of the caller's task object; it may
          only have an effect within a hardware interrupt handler
SeeAlso: AX=1117h,AX=DE17h
--------Q-15DE22-----------------------------
INT 15 - DESQview v2.26+ - "PROCESSMEM" - GET TASK MEMORY STATUS
        AX = DE22h
        DX = segment of task handle
Return: DX = total amount of memory in paragraphs
        BX = amount of system memory in paragraphs
        CX = largest block of system memory available in paragraphs
        AX = memory flags (see #00552)
Notes:  if the task handle is a child task, the returned values will be for the
          process containing the task, rather than the task itself
        if the process's system memory is swapped out, BX,CX,DX remain
          unchanged, because the memory usage cannot be determined
SeeAlso: AX=DE04h,AX=DE05h,AX=DE06h

Bitfields for DESQview process memory flags:
Bit(s)  Description     (Table 00552)
 0      system memory resides in shared memory
 1      process's memory is swapped out
 2      process's system memory is swapped out
--------Q-15DE23-----------------------------
INT 15 U - DESQview v2.31+ - ???
        AX = DE23h
        BX = ??? IRQ number on first PIC?
        CX = ??? IRQ number on second PIC?
Return: ???
Note:   called by QEMM 6.00+
--------Q-15DE24-----------------------------
INT 15 - DESQview v2.40+ - "XNEWPROC" - START NEW APPLICATION
        AX = DE24h
        BX = length of .DVP data
        CX = length of ??? string
        DS:SI -> ??? string
        ES:DI -> .DVP data (see #00427 at AX=102Ch)
Return: BX = segment of task handle??? or 0000h on error
Note:   this call is similar to AX=102Ch except that it can interpret the
          extended DVP data
SeeAlso: AX=102Ch
--------Q-15DE25-----------------------------
INT 15 - DESQview v2.40+ - "GETDVPATH" - GET DESQview DIRECTORY
        AX = DE25h
        ES:DI -> 67-byte buffer for ASCIZ directory name
Return: ES:DI buffer filled with directory from which DESQview was started
BUG:    DV 2.42 does not place a terminating NUL at the end of the directory
          name, so if the buffer is not cleared to zeros before the call,
          there is no way to tell where the directory name ends.  This bug
          has been fixed in DV 2.52 (DV/X 1.02)
SeeAlso: AX=DE2Eh,INT 21/AH=47h
--------Q-15DE26-----------------------------
INT 15 - DESQview v2.40+ - "GETFOREGROUND" - GET KEYBOARD FOCUS
        AX = DE26h
Return: BX = segment of handle for task with keyboard focus
Note:   under DESQview/X, the X server always has the keyboard focus unless a
          "direct" window is active
SeeAlso: AX=DE2Fh,INT 2F/AX=DE0Ah
--------Q-15DE27-----------------------------
INT 15 - DESQview v2.50+ - "ADDINSTANCEDATA" - ADD PER-TASK SAVE/RESTORE AREA
        AX = DE27h
        BX = type
            0000h process
            0001h task
        ES:DI -> list of Instance Item Structures (see #00553)
Return: CF clear if successful
            AX = ???
            BX = ???
        CF set on error
            AX = error code???
                0004h invalid BX value
Note:   DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
SeeAlso: INT 2F/AX=DE08h,INT 2F/AX=DE09h

Format of DESQview Instance Item Structure [one element of list]:
Offset  Size    Description     (Table 00553)
 00h    WORD    length of data area DESQview should save and restore on context
                  switches (0000h = end of list)
 02h    DWORD   pointer to area to be saved/restored
--------Q-15DE28-----------------------------
INT 15 U - DESQview v2.50+ - ???
        AX = DE28h
        BX = segment of ??? or 0000h for default
        ???
Return: ???
Note:   DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
SeeAlso: AX=DE2Ah
--------Q-15DE29BX0000-----------------------
INT 15 U - DESQview/X - ???
        AX = DE29h
        BX = 0000h
        ???
Return: CF clear if successful
            ???
        CF set on error
Notes:  DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
        under DESQview 2.60, this function and all other subfunctions of
          AX=DE29h always return CF set, as they are unique to DESQview/X
--------Q-15DE29BX0001-----------------------
INT 15 U - DESQview/X - ???
        AX = DE29h
        BX = 0001h
        DX = segment of window handle
Return: CF clear if successful
            AX = ???
            DX = ???
        CF set on error
Note:   DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
--------Q-15DE29BX0002-----------------------
INT 15 U - DESQview/X - ???
        AX = DE29h
        BX = 0002h
        DX = segment of window handle
Return: CF clear if successful
            AX = ???
            DX = ???
        CF set on error
Note:   DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
--------Q-15DE29BX0003-----------------------
INT 15 U - DESQview/X - ???
        AX = DE29h
        BX = 0003h
        DX = segment of window handle
Return: CF clear if successful
            ???
        CF set on error
Note:   DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
--------Q-15DE29BX0004-----------------------
INT 15 U - DESQview/X - GET DISPLAY NAME
        AX = DE29h
        BX = 0004h
        CX = size of buffer in bytes
        DX = segment of window handle
        ES:DI -> buffer for display name
Return: CF clear if successful
            buffer filled with ASCIZ display name (truncated if necessary) or
              null string if no display
        CF set on error
Notes:  DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
        the name ":0" refers to the local display
--------Q-15DE29BX0005-----------------------
INT 15 U - DESQview/X - ???
        AX = DE29h
        BX = 0005h
        ???
Return: CF clear if successful
            ???
        CF set on error
Note:   under DESQview 2.60, this function and all other subfunctions of
          AX=DE29h always return CF set, as they are unique to DESQview/X
--------Q-15DE2A-----------------------------
INT 15 - DESQview v2.50+ - "DISPATCHINTAFTERDOS" - INTERRUPT ANOTHER TASK
        AX = DE2Ah
        BX = segment of handle for task to interrupt or 0000h for caller
        DX:CX -> interrupt routine
        BP,SI,DI,DS,ES as required by interrupt routine
Return: nothing
Notes:  DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
        this call is the same as AX=DE20h except that it will delay
          interrupting the specified task until after it has exited DOS
SeeAlso: AX=1021h,AX=DE20h
--------Q-15DE2B-----------------------------
INT 15 - DESQview v2.50+ - "OBJNEXT" - TRAVERSE OBJECT LIST
        AX = DE2Bh
        ES:DI -> starting object
                0000h:0000h for first object in list???
Return: AX = status
            0000h successful
                ES:DI -> next object of same type (window/non-window)
            0001h failed (ES:DI was not a valid handle)
Notes:  DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
        there are two separate lists, one for window/task objects and one
          for all other objects
SeeAlso: AX=1016h,AX=DE2Ah,AX=DE2Ch
--------Q-15DE2C-----------------------------
INT 15 - DESQview v2.50+ - "WININFO" - GET WINDOW INFORMATION
        AX = DE2Ch
        DX = window information format version (0100h for DESQview 2.5x)
        BX = segment of window handle or 0000h for default
        ES:DI -> buffer for window information (see #00554)
Return: AX = status
            0000h successful
Note:   DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
SeeAlso: AX=1000h,AX=1016h,AX=DE01h,AX=DE2Bh

Format of DESQview window information:
Offset  Size    Description     (Table 00554)
 00h    BYTE    task flag: 00h window, 01h task
 01h    BYTE    process number if owner task
                00h if non-owner task
 02h    WORD    segment of owner's handle, 0000h if orphaned
 04h    WORD    mapping context (see #00416 at AX=1016h)
 06h    BYTE    task status (see #00555)
 07h    BYTE    unused
 08h    WORD    status bits (see #00556)
 0Ah    BYTE    01h if foreground-only window

(Table 00555)
Values for DESQview task status:
 00h    "Waiting" waiting for input
 01h    "Idle" keyboard poll limit reached
 03h    same as 01h
 04h    "Pausing" INT 15/AX=1000h pause called
 04h    DV/X direct: user did something to allow task switch
 05h    "ModeChg" video mode about to be changed
 06h    "ModeNtf" notify that video mode changed
 07h    "MoniCh" requested change to other monitor
 08h    "StartPgm" control relinquished to start new process
 09h    "MgrCan" made window manager CANCEL command
 0Ah    "Slicing" time slice expired
 0Bh    "Exit DOS" notify on DOS calls
 0Ch    "Enter DOS" process is re-entering DOS
 0Dh    "Terminate" INT 21/AH=4Ch or task freed
 0Eh    "BrkNxt" Control-Break pressed
 0Fh    "MgrCol" keyboard focus taken away
 10h    "PgmInt" interrupted by API call from another task
 11h    "BldOpen" call to INT 15/AX=DE01h

Bitfields for DESQview task status bits:
Bit(s)  Description     (Table 00556)
 6      task is freeing another task
 5      process is being created
 4      user suspended process
 3      process suspended itself
 2      process is resized direct window (suspended)
 1      process swapped out
 0      DESQview process
--------Q-15DE2D-----------------------------
INT 15 U - DESQview v2.50+ - GET/SET SOCKET HANDLER
        AX = DE2Dh
        CX = direction
            FFFFh set socket handler
                DX:BX -> FAR function for socket interface
                        must be of the format described under INT 63"DESQview"
                          at #03515
            other get socket handler
                Return: DX:BX -> socket handler (see #03515)
Notes:  DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
        the "set" subfunction is normally called only by SOCKET.DVR
SeeAlso: AX=DE2Eh,INT 63"DESQview",#03515
--------Q-15DE2E-----------------------------
INT 15 U - DESQview v2.50+ - SOCKET API
        AX = DE2Eh
        DX:BX -> socket record (see #00558)
                0000h:0000h to create a new socket record
Return: CX = size of socket record in bytes
        DX:BX -> socket record which was used
Notes:  DESQview 2.50-2.52 are distributed as part of DESQview/X v1.0x.
        socket records are allocated from common memory
        for Unix compatibility, each socket and connection on a socket is
          allocated a DOS file handle (referencing an SFT for NUL) which is
          used on various calls to specify which of possibly multiple
          connections is to be operated upon
SeeAlso: AX=DE2Dh,INT 61/AX=0001h/SF=0001h"VINES",INT 63"DESQview"

(Table 00557)
Values for DESQview/X socket API function number:
 0000h  initialize socket???
 0001h  "gethostname"
 0002h  "ioctl" check for input
 0003h  "sleep" delay for specified period
 0004h  "htons" convert word to network (big-endian) byte order
 0005h  "select"
 0006h  "bsd_close"/"so_close" close socket
 0007h  NOP
 0008h  "connect" initiate connection on socket
 0009h  "recv"/"recvfrom" read from socket
 000Ah  "socket"
 000Bh  ???
 000Ch  "gethostbyname"
 000Dh  "send"/"sendto" write to socket
 000Eh  ??? (does something to all connections for process)
 000Fh  "getpid" get process identifier
 0010h  "gettimeofday"
 0011h  "bind" assign name to socket
 0012h  "listen" listen for connections on socket
 0013h  "accept" accept connection on socket
 0014h  connect to X server
 0015h  "gethostbyaddr" get host information for an address
 0016h  "getprotobyname"
 0017h  "getprotobynumber"
 0018h  "getservbyname"
 0019h  "getservbyport"
 001Ah  "getsockname" determine name bound to socket
 001Bh  "getpeername" get name of connected peer
 001Ch  "getsockopt"/"setsockopt"
 001Dh  "so_exit"        close all sockets for calling process
 001Eh  "issock" determine whether file handle references socket
 001Fh  "so_attach" reattach previously detached socket
 0020h  "so_detach" temporarily detach socket
 0021h  "dvpath" get DESQview directory (see also AX=DE24h)
 0022h  "NewProc" start new application (see also AX=102Ch)
 0023h  "so_linkup"
 0024h  "CanonicalPath" canonicalize filename (see also INT 21/AH=60h)
 0025h  indirect INT 15h call
 0026h  Network Manager interface
 0027h  "so_unlink"    close connection from "so_linkup"
 0028h  "raisepriority"
 0029h  "lowerpriority"
 002Ah  "so_private" ???
 FFFFh  "NetExit" (appears to be a NOP)

Format of DESQview/X socket record:
Offset  Size    Description     (Table 00558)
 00h    WORD    signature F0ADh
 02h    WORD    function number (see #00557)
 04h    WORD    returned error code (see #00578)
 06h    WORD    maximum message size??? (usually 0400h)
 08h    WORD    PSP segment to use or 0000h if socket not valid
 0Ah    WORD    scratch space (JFT size)
 0Ch    DWORD   scratch space (JFT address)
 10h    DWORD   mailbox handle (initialized by function 0000h)
 14h    DWORD   timer object handle (initialized by function 0000h)
---function 0000h---
 18h    WORD    (ret) ???
---function 0001h---
 18h    WORD    (ret) status???
 1Ah 128 BYTEs  (ret) ASCIZ hostname (empty string if not on network)
 9Ah    WORD    maximum length of hostname to return
---function 0002h---
 18h    WORD    (ret) status
 1Ah    WORD    socket's file handle
 1Ch    WORD    IOCTL function
                05h "FIONREAD" determine available input
                06h "FIONBIO" set blocking state of socket
 1Eh    WORD    (return, subfn 05h) number of bytes available for reading
                (call, subfn 06h) 0000h blocking, nonzero nonblocking
---function 0003h---
 18h  2 BYTEs   unused
 1Ah    WORD    delay time in seconds
---function 0004h---
 18h    WORD    (ret) result in network (big-endian) byte order
 1Ah    WORD    value to convert to network byte order
---function 0005h---
 18h    WORD    (ret) number of handles meeting the specified conditions???
 1Ah    WORD    number of file handles in each bitset
 1Ch    DWORD   bitset of socket handles to check for readability
 20h    DWORD   bitset of socket handles to check for writability
 24h    DWORD   bitset of socket handles to check for errors
 28h    WORD    timeout in ??? or 0000h to block until some socket ready
 2Ah    DWORD   ???
 2Eh    DWORD   ???
---function 0006h---
 18h    WORD    (ret) status: 0000h if successful, FFFFh on error
 1Ah    WORD    socket's file handle
---function 0008h---
 18h    WORD    (ret) status: 0000h if successful, FFFFh on error
 1Ah    WORD    socket's file handle
 1Ch    WORD    0001h if socket name specified, 0000h if not
 1Eh    WORD    length of socket name
 20h  N BYTEs   name of socket to which to connect
---function 0009h---
 18h    WORD    (ret) number of bytes actually read, 0000h if connection
                        closed, or FFFFh on error
 1Ah    WORD    socket's file handle
 1Ch    WORD    number of bytes to read
 1Eh    WORD    flags
 20h    WORD    0000h if no source address desired
                0001h if source address is to be stored (datagram sockets)
 22h    WORD    length of source address
 24h 110 BYTEs  source address
 92h 1K BYTEs   buffer for data to be read
---function 000Ah---
 18h    WORD    (ret) socket's file handle or FFFFh on error
 1Ah    WORD    address family (0001h,0002h)
 1Ch    WORD    socket type
 1Eh    WORD    protocol
---function 000Bh---
 18h    WORD    (ret) 0001h if ??? or FFFFh on error
 1Ah    WORD    socket's file handle
 1Eh    WORD    (call) ???
---function 000Ch---
 18h 128 BYTEs  ASCIZ hostname (special case if empty string or "unix")
 98h    ???     (ret) packed 'hostent' structure
 A2h    ???     (ret) ???
---function 000Dh---
 18h    WORD    (ret) number of bytes actually written or FFFFh on error
 1Ah    WORD    socket's file handle
 1Ch    WORD    number of bytes to write
 1Eh    WORD    number of bytes to follow in subsequent writes???
 20h    WORD    flags
 22h    WORD    0000h if no destination specified, 0001h if destination present
 24h    WORD    0001h if broadcast message???, 0000h if not
                (ignored if no destination specified)
 26h    WORD    length of destination address
 28h 110 BYTEs  destination address
 96h 1K BYTEs   buffer containing data to be written
---function 000Eh---
 no additional fields
---function 000Fh---
 18h    DWORD   (ret) DESQview task handle of calling process
---function 0010h---
 18h    DWORD   (ret) current time
 1Ch    DWORD   (ret) ???
---function 0011h---
 18h    WORD    (ret) status: 0000h if successful, FFFFh on error
 1Ah    WORD    socket's file handle
 1Ch    WORD    length of name
 1Eh  N BYTEs   buffer for socket name
---function 0012h---
 18h    WORD    (ret) status: 0000h if successful, FFFFh on error
 1Ah    WORD    socket's file handle
 1Ch    WORD    maximum backlog of pending connections allowed on socket
---function 0013h---
 18h    WORD    (ret) file handle for new connection or FFFFh on error
 1Ah    WORD    listen()ing socket's file handle
 1Ch    WORD    (call) length of buffer for connecting entity's address
                (ret) actual length of address
 1Eh  N BYTEs   buffer for connecting entity's address (110 bytes???)
---function 0014h---
 18h    WORD    (ret) socket's file handle or FFFFh on error
 1Ah  4 BYTEs   (ret) ???
 1Eh    WORD    (ret) ???
 20h    WORD    (ret) ???
 22h 256 BYTEs  ASCIZ X display name
122h    ???
---function 0015h---
 18h    WORD    (call) type of address??? (test for 0001h seen)
 1Ah    WORD    (call) length of buffer for host address
 1Ch 110 BYTEs  buffer containing ASCIZ host address
 8Ah    WORD    (ret) offset of official host name
 8Ch    WORD    (ret) offset of alias list???
 8Eh    WORD    (ret) address type???
 90h    WORD    (ret) length of an address in bytes???
 92h    WORD    (ret) offset of address???
 9Ah  N BYTEs   (ret) buffer for hostname, alias list, and host address
---function 0016h---
 18h    ???     buffer for ASCIZ protocol name
 98h    ???
---function 0017h---
 18h    WORD    (call) protocol number
 1Ah    WORD    (ret) ??? or 0001h
---function 0018h---
 18h 128 BYTEs  buffer containing ASCIZ ???
 98h 128 BYTEs  buffer containing ASCIZ ???
118h    WORD    (ret) ???
---function 0019h---
 18h    WORD    port number
 1Ah 128 BYTEs  (call) ASCIZ host name
                (ret) packed servent strctures???
 9Ah    WORD    (ret) ???
---function 001Ah---
 18h    WORD    (ret) 0000h if successful, FFFFh on error
 1Ah    WORD    socket's file handle
 1Ch    WORD    (call) length of buffer for socket name
                (ret) actual length of socket name
 1Eh  N BYTEs   buffer for socket name
---function 001Bh---
 18h    WORD    (ret) status: 0000h if successful, FFFFh on error
 1Ah    WORD    socket's file handle
 1Ch    WORD    (call) size of buffer for name
                (ret) actual size of name
 1Eh  N BYTEs   buffer for peer's name
---function 001Ch---
 18h    WORD    (ret) status: 0000h if successful, FFFFh on error
 1Ah    WORD    direction: 0000h to get, 0001h to set
 1Ch    WORD    socket's file handle
 1Eh    WORD    option level
 20h    WORD    option name
 22h    WORD    (call) length of buffer for option value
                (ret) actual length of option value
 24h  N BYTEs   buffer for option value
---function 001Dh---
 no additional fields
---function 001Eh---
 18h    WORD    (ret) status: 0000h ??? or 0001h ???
 1Ah    WORD    file handle which may or may not be a socket
---function 001Fh---
 18h    WORD    (ret) file handle or FFFFh on error
 1Ah    DWORD   (call) pointer to Socket Context Record (see #00579) of a
                        previously detached socket
---function 0020h---
 18h    WORD    (ret) status: 0000h if successful or FFFFh on error
 1Ah    WORD    socket's file handle
 1Ch    DWORD   (ret) pointer to Socket Context Record (see #00579) for
                        the file handle
---function 0021h---
 18h 64 BYTEs   buffer for DESQview startup directory (see AX=DE25h)
---function 0022h---
 18h    DWORD   (ret) task handle of new application
 1Ch    WORD    size of .DVP data
 1Eh 129 BYTEs  ASCIZ ???
 9Fh  N BYTEs   .DVP data (see #00427 at AX=102Ch)
---function 0023h---
 18h    WORD    (ret) ??? or FFFFh on error
 1Ah    WORD    socket's file handle???
---function 0024h---
 18h    WORD    (ret) DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
                        0000h if successful
 1Ah 129 BYTEs  ASCIZ filename/pathname
11Bh 129 BYTEs  ASCIZ canonicalized filename/pathname (see INT 21/AH=60h)
---function 0025h---
 18h    WORD    value of AX
 1Ah    WORD    value of BX
 1Ch    WORD    (call) value of CX for call if AH value other than 12h
                (call) number of stack parameters if AH value is 12h
                (ret) returned CX for calls other than INT 15/AH=12h
 1Eh    WORD    value of DX
 20h    WORD    value of DI
 22h    WORD    value of SI
 24h    WORD    value of DS
 26h    WORD    value of ES
 28h    WORD    (ret) value of FLAGS after call
 2Ah  N DWORDs  (call) stack parameters for INT 15/AH=12h call
                (ret) stack results from INT 15/AH=12h call
---function 0026h---
 18h    WORD    (call) Network Manager subfunction (see #00559)
                (ret) status??? (0000h on error)
 1Ah    WORD    (call) size of parameter data
                (ret) size of returned data
 1Ch  N BYTEs   (call) parameter data required by call (see #00560,#00561,#00577)
                (ret) result data (see #00570,#00571,#00576)
---function 0027h---
 18h    WORD    (ret) status: 0000h if successful, FFFFh on error
 1Ah    WORD    socket's file handle
---functions 0028h,0029h---
 18h    WORD    (call) file handle for which to set priority low/high
                        FFFFh to change calling task's priority
---function 002Ah---
 no additional fields

(Table 00559)
Values for DESQview/X Network Manager subfunction:
 0004h  "so_exit"???
 0005h  "gethostbyname"
 0006h  "gethostname"
 0009h  "socket"
 000Dh  "gethostbyaddr"
 000Fh  "getprotobyname"
 0010h  get protocol name for protocol number
 0011h  "getservbyname"
 0012h  "getservbyport" (see #00563)
 0013h  "getsockname"??? (see #00564)
 0016h  "shutdown" (see #00565)
 0017h  kill Network Manager
 0018h  "getpeername"??? (see #00566)
 0019h  ??? (called by socket function 0000h) (see #00567)
 001Ah  ??? (see #00568)
 001Bh  "so_linkup" (see #00569)
 001Dh  "getnetstatus" get network services (see #00570)
 001Fh  "getpwuid"
 0020h  "getpwnam"
 0021h  "getpwvar"
 0022h  "crypt"
 0023h  "so_unlink"
 0024h  "getlogin" (see #00571)
 0028h  "sethostent"
 0029h  "gethostent"
 002Ah  "soaddhost"
 002Bh  "soupdatehost"
 002Ch  "sodeletehost"
 002Dh  "setservent"
 002Eh  "getservent"
 002Fh  "setpwent"
 0030h  "getpwent" (see #00572)
 0031h  "sethostpath" (see #00573)
 0032h  "endservent"
 0033h  "endhostent"
 0034h  "getnettype" get IP network number (see #00574)
 0035h  ??? (pops up Network Manager window)
 0037h  "getnettimeout" (see #00575)
 0038h  get machine name and IP address (see #00576)
 0039h  "getuid" (see #00577)
---DV/X v2.0+ ---
 0041h  "deletepwnam"
 0045h  "renamepw"

Format of Function 0026h/Subfunction 000Fh data:
Offset  Size    Description     (Table 00560)
 00h  8 BYTEs   (ret) ???

Format of Function 0026h/Subfunction 0010h data:
Offset  Size    Description     (Table 00561)
 00h  2 BYTEs   (ret) ???
 02h    WORD    (ret) protocol number
 04h    WORD    (call) protocol number for which to get name
 06h    WORD    (ret) ???
 08h    var     (ret) ASCIZ protocol name
 N      var     (ret) ASCIZ protocol name

Format of Function 0026h/Subfunction 0011h data:
Offset  Size    Description     (Table 00562)
 00h  8 BYTEs   ???
 08h    var     (ret) ASCIZ protocol name
        var     (ret) ASCIZ ??? name
        var     (ret) ASCIZ ??? name

Format of Function 0026h/Subfunction 0012h data:
Offset  Size    Description     (Table 00563)
 00h  8 BYTEs   (ret) ???

Format of Function 0026h/Subfunction 0013h data:
Offset  Size    Description     (Table 00564)
 00h 116 BYTEs  (ret) ???

Format of Function 0026h/Subfunction 0016h ("shutdown") data:
Offset  Size    Description     (Table 00565)
 00h    WORD    (ret) shutdown status (0000h successful, FFFFh error)
 02h  4 BYTEs   (ret) ???
 04h    WORD    (call) socket handle
 06*h   WORD    (call) what (0 = receives, 1 = sends, 2 = both)

Format of Function 0026h/Subfunction 0018h data:
Offset  Size    Description     (Table 00566)
 00h 116 BYTEs  (ret) ???

Format of Function 0026h/Subfunction 0019h data:
Offset  Size    Description     (Table 00567)
 00h  4 BYTEs   (ret) ???
 04h    DWORD   (ret) task handle of ???

Format of Function 0026h/Subfunction 001Ah data:
Offset  Size    Description     (Table 00568)
 00h 38 BYTEs   (ret) ???

Format of Function 0026h/Subfunction 001Bh data:
Offset  Size    Description     (Table 00569)
 00h 10 BYTEs   (ret) ???

Format of Function 0026h/Subfunction 001Dh return data [array]:
Offset  Size    Description     (Table 00570)
 00h    WORD    ??? or FFFFh if end of array
 02h  7 BYTEs   ???
 09h 27 BYTEs   ASCIZ name of service

Format of Function 0026h/Subfunction 0024h return data:
Offset  Size    Description     (Table 00571)
 00h    var     ASCIZ username

Format of Function 0026h/Subfunction 0030h data:
Offset  Size    Description     (Table 00572)
 00h    WORD    (call) UID or 0000h for current user
                (ret) ???
 02h    WORD    (ret) UID
 04h  6 BYTEs   (ret) ???
 0Ah    var     (ret) ASCIZ username
        var     (ret) ASCIZ encrypted password
        var     (ret) ASCIZ initial ("home") directory

Format of Function 0026h/Subfunction 0031h ("sethostpath") data:
Offset  Size    Description     (Table 00573)
 00h   4 BYTEs  ???
 04h 144 BYTEs  ASCIZ ???

Format of Function 0026h/Subfunction 0034h data:
Offset  Size    Description     (Table 00574)
 00h  1-3 BYTEs IP network number of caller's machine (low byte first)

Format of Function 0026h/Subfunction 0037h ("getnettimeout") return data:
Offset  Size    Description     (Table 00575)
 00h    WORD    (ret) timeout
 02h  2 BYTEs   (ret) ???

Format of Function 0026h/Subfunction 0038h return data:
Offset  Size    Description     (Table 00576)
 00h    BYTE    ???
 01h  4 BYTEs   IP address
 05h    var     ASCIZ machine name
        ???

Format of Function 0026h/Subfunction 0039h ("getuid") return data:
Offset  Size    Description     (Table 00577)
 00h    WORD    user ID
 02h  2 BYTEs   ???
SeeAlso: #00573,#00576

(Table 00578)
Values for DESQview/X socket error code:
 0000h  successful
 0009h  "BADF" bad file handle
 000Ch  "ENOMEM" out of memory
 000Eh  "EFAULT" bad address
 0016h  "EINVAL" invalid argument
 0018h  "EMFILE" too many open files
 0020h  "EPIPE" ??? broken pipe
 0023h  "EWOULDBLOCK" operation cannot be completed at this time
 0024h  "EINPROGRESS" operation now in progress
 0026h  "ENOTSOCK" socket invalid
 0028h  "EMSGSIZE" message too long to send atomically
 002Ch  "ESOCKTNOSUPPORT" socket type not supported
 002Fh  "EAFNOSUPPORT" address family not supp. by protocol fam.
 0031h  "EDOM" argument too large
 0038h  "EISCONN" socket is already connected
 0039h  "ENOTCONN" socket is not connected

Format of DESQview/X Socket Context Record:
Offset  Size    Description     (Table 00579)
 00h    DWORD   pointer to next Socket Context Record, 0000h:0000h if last
 04h    WORD    SFT index for socket, 00FFh if not connected, FFFFh if detached
 06h    WORD    PSP segment of owner or 0000h
 08h    WORD    mapping context of owning window (see #00416 at AX=1016h)
 0Ah  2 BYTEs   ???
 0Ch    WORD    address family
 0Eh    WORD    socket type
 10h    WORD    protocol
 12h    WORD    socket state
                0001h created
                0002h bound
                0003h listening???
                0005h connected
 14h    DWORD   timer object handle
 18h    DWORD   object handle (mailbox???)
 1Ch    DWORD   object handle of parent of above object or 0000h:0000h
 20h    DWORD   pointer to ??? or 0000h
 24h  6 BYTEs   ???
 2Ah    WORD    file handle for socket or FFFFh
 2Ch  2 BYTEs   ???
 2Eh    WORD    nonzero if socket nonblocking
---network connections only---
 30h  2 BYTEs   ???
 32h    WORD    ???
 34h  4 BYTEs   (big-endian) IP address of remote
 38h  6 BYTEs   ???
--------Q-15DE2F-----------------------------
INT 15 - DESQview v2.50+ - "VIDEONOTIFY" - HAS DIRECT WINDOW BEEN ACTIVE?
        AX = DE2Fh
Return: BX = status
            0001h keyboard focus has been given to a direct window since the
                last call
            0000h if not
Notes:  DESQview 2.50-2.53 are distributed as part of DESQview/X v1.00-1.10.
        Quarterdeck stated that this call would not be available under future
          versions of DESQview Classic, but it is still present in v2.60
--------Q-15DE30-----------------------------
INT 15 - DESQview v2.50+ - "GETDVXVERSION" - GET DESQview/X VERSION
        AX = DE30h
Return: BX = version (BH=major, BL=minor) or 0000h if not DESQview/X
Notes:  DESQview 2.50-2.53 are distributed as part of DESQview/X v1.00-1.10.
        you must first check the DESQview version to verify that it is 2.50 or
          greater
SeeAlso: INT 21/AH=2Bh/CX=4445h
--------Q-15DE31-----------------------------
INT 15 - DESQview/X v1.10 - ???
        AX = DE31h
        CX = ???
            0000h ???
            nonzero ???
        ???
Return: ???
--------b-15DF-------------------------------
INT 15 - Juko UNIQUE UX BIOS - TURBO MODE CONTROL
        AH = DFh
        AL = function
            00h turn on Turbo mode
            01h turn off Turbo mode
            02h set Turbo mode according to hardware switch
SeeAlso: INT 13/AX=FFFFh
--------b-15E00F-----------------------------
INT 15 - Compaq Systempro - MULTIPROCESSOR DISPATCH
        AX = E00Fh
        ES:BX -> start of 2nd processor's execution
Return: AL = status
            0Fh successful
            00h failure
SeeAlso: AX=E10Eh,AX=E200h
--------b-15E10E-----------------------------
INT 15 - Compaq Systempro - MULTIPROCESSOR END-OF-DISPATCH
        AX = E10Eh
        ES:BX -> start of 2nd processor's execution
Return: AL = status
            0Fh successful (halted)
            00h failure (not halted)
SeeAlso: AX=E00Fh,AX=E200h
--------b-15E200-----------------------------
INT 15 - Compaq Systempro - MULTIPROCESSOR AVAILABLE
        AX = E200h
Return: AX bit 15 set if 2nd processor available
SeeAlso: AX=E00Fh,AX=E10Eh
--------b-15E4-------------------------------
INT 15 - Tandy??? - ???
        AH = E4h
        AL = subfunction
            21h, 89h, 8Ah, 8Bh called by 386MAX v6.01
        DL = ???
Return: DL = 00h if successful???
Note:   the section of code in 386MAX which calls these functions also checks
          whether the ROM BIOS has both Tandy and Phoenix Technologies
          signatures if these calls fail; the Tandy 1000SL/TL BIOS does not
          support this function, however, returning the usual CF set/AH=86h for
          "unsupported function".
--------b-15E4-------------------------------
INT 15 - Compaq ROM BIOS 03/08/93 and newer - ???
        AH = E4h
        AL = subfunction
            00h get ???
                Return: CF clear
                        AH = 00h
                        CX = 0000h
                        BX = ??? (read from [XBDA:0094h])
            01h,02h unsupported by this ROM version
                Return: CF set, AH = 86h
            80h,90h,A0h,B0h,C0h,D0h,E0h,F0h set ???
                Return: CF clear
                        AH = 00h
                        CX = 0000h
                        BX = ???
            81h,91h,A1h,B1h,C1h,D1h,E1h,F1h unsupported by 3/8/93&4/8/93 ROMs
                Return: CF set, AH = 86h
Notes:  functions 80h/90h/etc. are not supported by the 4/8/93 EISA System ROM
        these functions are not supported by the 7/26/93 LTE Lite 386 ROM
--------!---Section--------------------------
Interrupt List, part 4 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------b-15E800-----------------------------
INT 15 - Compaq Contura - GET ???
        AX = E800h
Return: AX = 0000h
        BH = 00h
        BL = ??? (read from port 0C7Ch)
        CH = ???
        CL = ???
        DX = 0000h
Note:   also supported by 3/8/93 DESKPRO/i and 7/26/93 LTE Lite 386 ROM BIOS
--------b-15E800-----------------------------
INT 15 - Compaq Contura Aero, Contura 400 - GET SYSTEM MODEL CODE???
        AX = E800h
        BX = ??? (0000h)
Return: CF clear if successful
            BH = 02h
            BL = submodel??? (0Ch,0Dh,34h,38h,40h,44h,48h,64h,68h)
        CF set on error
        others???
Notes:  used by Compaq's SOFTPAQ number 0937 EPPBIOS.SYS to determine whether
          the Enhanced Parallel Port expected by that driver is available
        used by Compaq's SOFTPAW number 0856 VOLCTRL.EXE to determine whether
          volume control hardware expected by that driver is available
--------b-15E800-----------------------------
INT 15 - Compaq Prolinea - GET ???
        AX = E800h
        BX = ??? (1369h)
Return: BH = 01h
        BL = ???
        others???
Note:   used by Compaq's SOFTPAQ number 0718 INT10_04.SYS to determine whether
          the fix that driver applies is required (will not install if BX on
          return is other than 010Eh or 010Fh)
SeeAlso: AX=E802h
--------b-15E801-----------------------------
INT 15 - Phoenix BIOS v4.0 - GET MEMORY SIZE FOR >64M CONFIGURATIONS
        AX = E801h
Return: CF clear if successful
            AX = extended memory between 1M and 16M, in K (max 3C00h = 15MB)
            BX = extended memory above 16M, in 64K blocks
            CX = configured memory 1M to 16M, in K
            DX = configured memory above 16M, in 64K blocks
        CF set on error
Notes:  supported by the A03 level (6/14/94) and later XPS P90 BIOSes, as well
          as the Compaq Contura, 3/8/93 DESKPRO/i, and 7/26/93 LTE Lite 386 ROM
          BIOS
        supported by AMI BIOSes dated 8/23/94 or later
        on some systems, the BIOS returns AX=BX=0000h; in this case, use CX
          and DX instead of AX and BX
        this interface is used by Windows NT 3.1, OS/2 v2.11/2.20, and is
          used as a fall-back by newer versions if AX=E820h is not supported
SeeAlso: AH=8Ah"Phoenix",AX=E802h,AX=E820h,AX=E881h"Phoenix"
--------b-15E802-----------------------------
INT 15 - Compaq Contura - GET ???
        AX = E802h
Return: CF clear
        AX = 0000h
        BX = ???
        CX = 0000h
Note:   this function is also supported by the LTE Lite 25c, 25E, and 486; not
          supported by LTE Lite 20 and 25.
SeeAlso: AX=E801h"Phoenix"
--------b-15E820-----------------------------
INT 15 - newer BIOSes - GET SYSTEM MEMORY MAP
        AX = E820h
        EAX = 0000E820h
        EDX = 534D4150h ('SMAP')
        EBX = continuation value or 00000000h to start at beginning of map
        ECX = size of buffer for result, in bytes (should be >= 20 bytes)
        ES:DI -> buffer for result (see #00581)
Return: CF clear if successful
            EAX = 534D4150h ('SMAP')
            ES:DI buffer filled
            EBX = next offset from which to copy or 00000000h if all done
            ECX = actual length returned in bytes
        CF set on error
            AH = error code (86h) (see #00496 at INT 15/AH=80h)
Notes:  originally introduced with the Phoenix BIOS v4.0, this function is
          now supported by most newer BIOSes, since various versions of Windows
          call it to find out about the system memory
        a maximum of 20 bytes will be transferred at one time, even if ECX is
          higher; some BIOSes (e.g. Award Modular BIOS v4.50PG) ignore the
          value of ECX on entry, and always copy 20 bytes
        some BIOSes expect the high word of EAX to be clear on entry, i.e.
          EAX=0000E820h
        if this function is not supported, an application should fall back
          to AX=E802h, AX=E801h, and then AH=88h
        the BIOS is permitted to return a nonzero continuation value in EBX
          and indicate that the end of the list has already been reached by
          returning with CF set on the next iteration
        this function will return base memory and ISA/PCI memory contiguous
          with base memory as normal memory ranges; it will indicate
          chipset-defined address holes which are not in use and motherboard
          memory-mapped devices, and all occurrences of the system BIOS as
          reserved; standard PC address ranges will not be reported
SeeAlso: AH=C7h,AX=E801h"Phoenix",AX=E881h,MEM xxxxh:xxx0h"ACPI"

Format of Phoenix BIOS system memory map address range descriptor:
Offset  Size    Description     (Table 00580)
 00h    QWORD   base address
 08h    QWORD   length in bytes
 10h    DWORD   type of address range (see #00581)

(Table 00581)
Values for System Memory Map address type:
 01h    memory, available to OS
 02h    reserved, not available (e.g. system ROM, memory-mapped device)
 03h    ACPI Reclaim Memory (usable by OS after reading ACPI tables)
 04h    ACPI NVS Memory (OS is required to save this memory between NVS
          sessions)
 other  not defined yet -- treat as Reserved
SeeAlso: #00580
--------b-15E881-----------------------------
INT 15 - Phoenix BIOS v4.0 - GET MEMORY SIZE FOR >64M CONFIGURATIONS (32-bit)
        AX = E881h
Return: CF clear if successful
            EAX = extended memory between 1M and 16M, in K (max 3C00h = 15MB)
            EBX = extended memory above 16M, in 64K blocks
            ECX = configured memory 1M to 16M, in K
            EDX = configured memory above 16M, in 64K blocks
        CF set on error
Notes:  supported by AMI BIOSes dated 8/23/94 or later
        this interface is used by Windows NT 3.1, OS/2 v2.11/2.20, and is
          used as a fall-back by newer versions if AX=E820h is not supported
SeeAlso: AX=E801h"Phoenix",AX=E820h"Phoenix"
--------m-15F200CX454D-----------------------
INT 15 - Tandon memory mapper - Tandon MAPPER HARDWARE INITIALIZATION CHECK ???
        AX = F200h
        CX = 454Dh
Return: CF clear if hardware already initialised
            BX = upper RAM areas in use
                bit 0: C000-C3FF
                bit 1: C400-C7FF
                ...
                bit 11: EC00-EFFF
        CF set if hardware not initialised yet
--------B-1600-------------------------------
INT 16 - KEYBOARD - GET KEYSTROKE
        AH = 00h
Return: AH = BIOS scan code
        AL = ASCII character
Notes:  on extended keyboards, this function discards any extended keystrokes,
          returning only when a non-extended keystroke is available
        the BIOS scan code is usually, but not always, the same as the hardware
          scan code processed by INT 09.  It is the same for ASCII keystrokes
          and most unshifted special keys (F-keys, arrow keys, etc.), but
          differs for shifted special keys
        some (older) clone BIOSes do not discard extended keystrokes and manage
          function AH=00h and AH=10h the same
        the K3PLUS v6.00+ INT 16 BIOS replacement doesn't discard extended
          keystrokes (same as with functions 10h and 20h), but will always
          translate prefix E0h to 00h. This allows old programs to use extended
          keystrokes and should not cause compatibility problems
SeeAlso: AH=01h,AH=05h,AH=10h,AH=20h,AX=AF4Dh"K3PLUS",INT 18/AH=00h
SeeAlso: INT 09,INT 15/AH=4Fh
--------B-1601-------------------------------
INT 16 - KEYBOARD - CHECK FOR KEYSTROKE
        AH = 01h
Return: ZF set if no keystroke available
        ZF clear if keystroke available
            AH = BIOS scan code
            AL = ASCII character
Note:   if a keystroke is present, it is not removed from the keyboard buffer;
          however, any extended keystrokes which are not compatible with 83/84-
          key keyboards are removed by IBM and most fully-compatible BIOSes in
          the process of checking whether a non-extended keystroke is available
        some (older) clone BIOSes do not discard extended keystrokes and manage
          function AH=00h and AH=10h the same
        the K3PLUS v6.00+ INT 16 BIOS replacement doesn't discard extended
          keystrokes (same as with functions 10h and 20h), but will always
          translate prefix E0h to 00h. This allows old programs to use extended
          keystrokes and should not cause compatibility problems
SeeAlso: AH=00h,AH=11h,AH=21h,INT 18/AH=01h,INT 09,INT 15/AH=4Fh
--------B-1602-------------------------------
INT 16 - KEYBOARD - GET SHIFT FLAGS
        AH = 02h
Return: AL = shift flags (see #00582)
        AH destroyed by many BIOSes
SeeAlso: AH=12h,AH=22h,INT 17/AH=0Dh,INT 18/AH=02h,MEM 0040h:0017h

Bitfields for keyboard shift flags:
Bit(s)  Description     (Table 00582)
 7      Insert active
 6      CapsLock active
 5      NumLock active
 4      ScrollLock active
 3      Alt key pressed (either Alt on 101/102-key keyboards)
 2      Ctrl key pressed (either Ctrl on 101/102-key keyboards)
 1      left shift key pressed
 0      right shift key pressed
SeeAlso: #00587,#03743,MEM 0040h:0017h,#M0010
--------B-1603-------------------------------
INT 16 - KEYBOARD - SET TYPEMATIC RATE AND DELAY
        AH = 03h
        AL = subfunction
            00h set default delay and rate (PCjr and some PS/2)
            01h increase delay before repeat (PCjr)
            02h decrease repeat rate by factor of 2 (PCjr)
            03h increase delay and decrease repeat rate (PCjr)
            04h turn off typematic repeat (PCjr and some PS/2)
            05h set repeat rate and delay (AT,PS)
                BH = delay value (00h = 250ms to 03h = 1000ms)
                BL = repeat rate (00h=30/sec to 0Ch=10/sec [def] to 1Fh=2/sec)
            06h get current typematic rate and delay (newer PS/2s)
                Return: BL = repeat rate (above)
                        BH = delay (above)
Return: AH destroyed by many BIOSes
Note:   use INT 16/AH=09h to determine whether some of the subfunctions are
          supported
SeeAlso: INT 16/AH=09h,AH=29h"HUNTER",AH=2Ah"HUNTER"
--------B-1604-------------------------------
INT 16 - KEYBOARD - SET KEYCLICK (PCjr only)
        AH = 04h
        AL = keyclick state
            00h off
            01h on
Return: AH destroyed by many BIOSes
SeeAlso: AH=03h,AH=04h"K3PLUS"
--------b-1604-------------------------------
INT 16 - Tandy 2000 - KEYBOARD - FLUSH KEYBOARD BUFFER
        AH = 04h
Note:   this interrupt is identical to INT 51 on the Tandy 2000
SeeAlso: INT 16/AH=00h,INT 16/AH=02h,INT 16/AH=05h"Tandy 2000"
SeeAlso: INT 51"Tandy 2000"
--------K-1604-------------------------------
INT 16 - K3PLUS v6.22+ - SET KEYCLICK
        AH = 04h
        AL = keyclick state
            00h keyclick off, leave loudness setting unchanged
            01h keyclick on, leave loudness setting unchanged
            else
               bit 0: keyclick enabled if set
               bits 7-1: new keyclick loudness (non-zero)
Return: AH destroyed by many BIOSes
Note:   Applications which try to set a new loudness, but are unsure of the
          results of other INT 16/AH=04h implementations, should set the new
          loudness first, and then call this function again with AL=01h or
          AL=00h
SeeAlso: AH=03h,AH=04h"KEYBOARD",AX=AF4Dh
--------B-1605-------------------------------
INT 16 - KEYBOARD - STORE KEYSTROKE IN KEYBOARD BUFFER (AT/PS w enh keybd only)
        AH = 05h
        CH = BIOS scan code
        CL = ASCII character
Return: AL = status
            00h if successful
            01h if keyboard buffer full
        AH destroyed by many BIOSes
Notes:  under DESQview, a number of "keystrokes" invoke specific
          DESQview-related actions when they are read from the keyboard
          buffer (see #00583)
        similarly, some "keystrokes" invoke special functions on the HP 100LX
          and HP 200LX (see #00584)
SeeAlso: AH=00h,AH=25h"K3",AH=71h,AX=AF4Dh,AH=FFh,INT 15/AX=DE10h
SeeAlso: MEM 0040h:001Eh

(Table 00583)
Values for pseudo-keystrokes for DESQview:
 38FBh or FB00h switch to next window (only if main menu already popped up)
 38FCh or FC00h pop up DESQview main menu
 38FEh or FE00h close the current window
 38FFh or FF00h pop up DESQview learn menu

(Table 00584)
Values for pseudo-keystrokes for HP 100LX/200LX:
 EE00h  pop up topcard display and set other system manager applications
          into sleep mode
--------B-1605-------------------------------
INT 16 - KEYBOARD - SELECT KEYBOARD LAYOUT (PCjr only)
        AH = 05h
        AL = function
            01h set keyboard layout to French
            02h set keyboard layout to German
            03h set keyboard layout to Italian
            04h set keyboard layout to Spanish
            05h set keyboard layout to UK
            80h check if function supported
                Return: AL <> 80h if supported
Return: ???
        AH destroyed by many BIOSes
Note:   this function is called by the DOS 3.2 KEYBxx.COM
SeeAlso: AH=92h,AH=A2h,AX=AF4Dh
--------b-1605-------------------------------
INT 16 - Tandy 2000 - KEYBOARD - RESET KEYBOARD
        AH = 05h
Desc:   reset the keyboard and flush the keyboard buffer
Note:   this interrupt is identical to INT 51 on the Tandy 2000
SeeAlso: INT 16/AH=00h,INT 16/AH=02h,INT 16/AH=03h,INT 51"Tandy 2000"
----------160600-----------------------------
INT 16 - AAKEYS - GET NEXT KEYBOARD EVENT
        AX = 0600h
Return: CF clear if successful
            AL = next keyboard event in event buffer, FFh if buffer overflowed
        CF set on error
            AL = 00h buffer empty
        BX destroyed
Program: AAKEYS is a TSR by Anthony Appleyard which records keyboard scan
          codes in a 256-byte buffer in addition to any normal processing which
          takes place
Note:   the installation check consists of calling INT 16/AX=06xxh (where 'xx'
          is any subfunction other than those listed here) and testing whether
          AX=BEEFh on return
SeeAlso: AX=0601h,AX=0602h,AX=0603h,AX=0604h
----------160601-----------------------------
INT 16 - AAKEYS - EMPTY KEY-EVENT BUFFER
        AX = 0601h
Return: nothing
SeeAlso: AX=0600h,AX=0602h,AX=0603h,AX=0604h
----------160602-----------------------------
INT 16 - AAKEYS - DISABLE AAKEYS
        AX = 0602h
Return: AX,DX destroyed
Desc:   restores INT 09 and INT 16 and clears the TSRs signature byte
SeeAlso: AX=0600h,AX=0601h,AX=0603h,AX=0604h
----------160603-----------------------------
INT 16 - AAKEYS - GET KEY-EVENT BUFFER
        AX = 0603h
Return: ES:BX -> 256-byte circular key-event buffer
        ES:[AX] = offset of head of buffer
        ES:[AX+1] = offset of tail of buffer
SeeAlso: AX=0600h,AX=0601h,AX=0602h,AX=0604h
----------160604-----------------------------
INT 16 - AAKEYS - EMPTY BIOS KEYBOARD BUFFER
        AX = 0604h
Return: AX destroyed
SeeAlso: AX=0600h,AX=0601h,AX=0602h,AX=0603h
--------B-1609-------------------------------
INT 16 - KEYBOARD - GET KEYBOARD FUNCTIONALITY
        AH = 09h
Return: AL = supported keyboard functions (see #00585)
        AH destroyed by many BIOSes
Note:   this function is only available if bit 6 of the second feature byte
          returned by INT 15/AH=C0h is set (see #00509)
SeeAlso: AH=03h,AH=0Ah,AH=10h,AH=11h,AH=12h,AH=20h,AH=21h,AH=22h,INT 15/AH=C0h

Bitfields for supported keyboard functions:
Bit(s)  Description     (Table 00585)
 7      reserved
 6      INT 16/AH=20h-22h supported (122-key keyboard support)
 5      INT 16/AH=10h-12h supported (enhanced keyboard support)
 4      INT 16/AH=0Ah supported
 3      INT 16/AX=0306h supported
 2      INT 16/AX=0305h supported
 1      INT 16/AX=0304h supported
 0      INT 16/AX=0300h supported
SeeAlso: #00511
--------K-160A-------------------------------
INT 16 - KEYBOARD - GET KEYBOARD ID
        AH = 0Ah
Return: BX = keyboard ID (see #00586)
        AH destroyed by many BIOSes
Notes:  check return value from AH=09h to determine whether this function is
          supported
        this function is also supported by the K3PLUS v6.00+ INT 16 BIOS
          replacement
SeeAlso: AH=09h,AX=AF4Dh,MEM 0040h:00C2h"AMI"

(Table 00586)
Values for keyboard ID:
 0000h  no keyboard attached
 41ABh  Japanese "G" keyboard (translate mode)
        MF2 Keyboard (usually in translate mode)
 54ABh  Japanese "P" keyboard (translate mode)
 83ABh  Japanese "G" keyboard (pass-through mode)
        MF2 Keyboard (pass-through mode)
 84ABh  Japanese "P" keyboard (pass-through mode)
 90ABh  old Japanese "G" keyboard
 91ABh  old Japanese "P" keyboard
 92ABh  old Japanese "A" keyboard
--------B-1610-------------------------------
INT 16 - KEYBOARD - GET ENHANCED KEYSTROKE (enhanced kbd support only)
        AH = 10h
Return: AH = BIOS scan code
        AL = ASCII character
Notes:  if no keystroke is available, this function waits until one is placed
          in the keyboard buffer
        the BIOS scan code is usually, but not always, the same as the hardware
          scan code processed by INT 09.  It is the same for ASCII keystrokes
          and most unshifted special keys (F-keys, arrow keys, etc.), but
          differs for shifted special keys.
        unlike AH=00h, this function does not discard extended keystrokes
        INT 16/AH=09h can be used to determine whether this function is
          supported, but only on later model PS/2s
SeeAlso: AH=00h,AH=09h,AH=11h,AH=20h,MEM 0040h:0019h,MEM 0040h:001Eh
--------B-1611-------------------------------
INT 16 - KEYBOARD - CHECK FOR ENHANCED KEYSTROKE (enh kbd support only)
        AH = 11h
Return: ZF set if no keystroke available
        ZF clear if keystroke available
            AH = BIOS scan code
            AL = ASCII character
Notes:  if a keystroke is available, it is not removed from the keyboard buffer
        unlike AH=01h, this function does not discard extended keystrokes
        some versions of the IBM BIOS Technical Reference erroneously report
          that CF is returned instead of ZF
        INT 16/AH=09h can be used to determine whether this function is
          supported, but only on later model PS/2s
SeeAlso: AH=01h,AH=09h,AH=10h,AH=21h,INT 09,INT 15/AH=4Fh
--------B-1612-------------------------------
INT 16 - KEYBOARD - GET EXTENDED SHIFT STATES (enh kbd support only)
        AH = 12h
Return: AL = shift flags 1 (same as returned by AH=02h) (see #00587)
        AH = shift flags 2 (see #00588)
Notes:  AL bit 3 set only for left Alt key on many machines
        AH bits 7 through 4 always clear on a Compaq SLT/286
        INT 16/AH=09h can be used to determine whether this function is
          supported, but only on later model PS/2s
        many BIOSes (including at least some versions of Phoenix and AMI) will
          destroy AH on return from functions higher than AH=12h, returning
          12h less than was in AH on entry (due to a chain of DEC/JZ
          instructions)
SeeAlso: AH=02h,AH=09h,AH=22h,AH=51h,INT 17/AH=0Dh,MEM 0040h:0017h

Bitfields for keyboard shift flags 1:
Bit(s)  Description     (Table 00587)
 7      Insert active
 6      CapsLock active
 5      NumLock active
 4      ScrollLock active
 3      Alt key pressed (either Alt on 101/102-key keyboards)
 2      Ctrl key pressed (either Ctrl on 101/102-key keyboards)
 1      left shift key pressed
 0      right shift key pressed
SeeAlso: #00582,#00588,MEM 0040h:0017h,#M0010

Bitfields for keyboard shift flags 2:
Bit(s)  Description     (Table 00588)
 7      SysReq key pressed (SysReq is often labeled SysRq)
 6      CapsLock pressed
 5      NumLock pressed
 4      ScrollLock pressed
 3      right Alt key pressed
 2      right Ctrl key pressed
 1      left Alt key pressed
 0      left Ctrl key pressed
SeeAlso: #00587,MEM 0040h:0018h,#M0011
--------J-1613-------------------------------
INT 16 - DOS/V - DOUBLE-BYTE CHARACTER SET SHIFT CONTROL
        AH = 13h
        AL = function
            00h set shift status
                DX = shift status (see #00589), must preserve internal status
                          bits
            01h get shift status
                Return: DX = current shift status (see #00589)
Note:   these functions are supplied by the Japanese Front-End Processor
SeeAlso: AH=14h,INT 21/AX=6301h

Bitfields for DOS/V shift status:
Bit(s)  Description     (Table 00589)
 0      full-size rather than half-size
 2-1    character input mode
        00 alphanumeric, 01 Katakana, 10 Hiragana, 11 unused
 5-3    internal status
 6      Romaji enabled
 7      Katakana to Kanji conversion enabled
 15-8   internal status
--------J-1614-------------------------------
INT 16 - DOS/V - SHIFT STATUS DISPLAY CONTROL
        AH = 14h
        AL = function
            00h enable display
            01h disable display
            02h get display state
                Return: AL = current state (00h enabled, 01h disabled)
Desc:   control the screen-bottom shift status row(s) for the Japanese
          Front-End Processor
SeeAlso: AH=13h,INT 10/AH=19h,INT 10/AH=1Dh
--------B-1620-------------------------------
INT 16 - KEYBOARD - GET 122-KEY KEYSTROKE (122-key kbd support only)
        AH = 20h
Return: AH = BIOS scan code (see AH=10h)
        AL = ASCII character
Note:   use AH=09h to determine whether this function is supported
SeeAlso: AH=00h,AH=09h,AH=10h,AH=21h,AH=22h
--------b-1620------------------------------------
INT 16 - HUNTER 16 - SET TEMPORARY SHIFT
        AH = 20h
        AL = shift status (see #00590)
Notes:  the Husky Hunter 16 is an 8088-based ruggedized laptop.  Other family
          members are the Husky Hunter, Husky Hunter 16/80, and Husky Hawk.
        the user can override the specified settings by pressing the keys

Bitfields for HUNTER 16 shift status:
Bit(s)  Description     (Table 00590)
 4      Scroll Lock on
 5      Num Lock on
 6      Caps Lock on
--------K-1620-------------------------------
INT 16 O - K3 v1.5x, K3PLUS v5.xx - GET EXTENDED BUFFER STATE
        AH = 20h
Return: AX = K3 version
        ES:BX -> extended keyboard buffer start
        ES:DX -> extended keyboard buffer end
        ES:SI -> next keystroke
        ES:DI -> last keystroke in buffer
        CX = number of keystrokes in buffer
Program: K3PLUS is an extended keyboard driver by Matthias Paul and Axel C.
          Frinke, originally based on the K3 extended German keyboard driver
          by Martin Gerdes published in c't magazine in 1988
Note:   this function was normally unsupported under K3PLUS v6.00-v6.22 and
          is no longer supported by v6.30+; use AX=AF20h instead
SeeAlso: AH=25h"K3",AX=AF20h,INT 2F/AX=D44Fh/BX=0000h,INT 2F/AX=ED58h
--------B-1621-------------------------------
INT 16 - KEYBOARD - CHECK FOR 122-KEY KEYSTROKE (122-key kbd support only)
        AH = 21h
Return: ZF set if no keystroke available
        ZF clear if keystroke available
            AH = BIOS scan code
            AL = ASCII character
Notes:  use AH=09h to determine whether this function is supported
        some versions of the IBM BIOS Technical Reference erroneously report
          that CF is returned instead of ZF
        K3PLUS v6.00+ supports this function as an alias of AH=11h
SeeAlso: AH=01h,AH=09h,AH=11h,AH=20h,AH=21h
--------b-1621------------------------------------
INT 16 - HUNTER 16 - CONTROL SHIFT KEYS
        AH = 21h
        AL = shift keys to control (see #00582)
        BL = shift state for disabled keys
Note:   If a bit in AL is set the key is disabled and set to the state of the
          corresponding bit in BL
SeeAlso: AH=20h"HUNTER",AH=22h"HUNTER"
--------B-1622-------------------------------
INT 16 - KEYBOARD - GET 122-KEY SHIFT STATUS (122-key kbd support only)
        AH = 22h
Return: AL = shift flags 1 (see #00587)
        AH = shift flags 2 (see #00588)
Notes:  use AH=09h to determine whether this function is supported
        K3PLUS v6.00+ supports this function as an alias of AH=12h
SeeAlso: AH=02h,AH=09h,AH=12h,AH=20h,AH=21h
--------b-1622------------------------------------
INT 16 - HUNTER 16 - CONTROL CTRL-ALT-DEL
        AH = 22h
        AL = new Ctrl-Alt-Del state (00h enabled, nonzero disabled)
        BX = 0708h
        CX = 0910h
        DX = 1112h
Return: AL = 00h if successful
SeeAlso: AH=21h"HUNTER",AH=23h"HUNTER",AH=2Ah
--------b-1623------------------------------------
INT 16 - HUNTER 16 - CONTROL EMERGENCY BREAKOUT
        AH = 23h
        AL = new state of breakout (00h enabled, nonzero disabled)
        BX = 0708h
        CX = 0910h
        DX = 1112h
Return: AL = 00h if successful
Desc:   Enables or disables the emergency breakout feature, where the
          Hunter 16 at power on checks whether the X and P keys are pressed.
          If so the machine will boot rather than continue the running program
SeeAlso: AH=22h"HUNTER"
--------b-1624------------------------------------
INT 16 - HUNTER 16 - REDEFINE KEY CODES
        AH = 24h
        AL = Matrix Code (see #00591)
        BL = new Key code
Return: AL = status (00h successful, nonzero failed)
SeeAlso: AH=2Bh,AH=2Ch

(Table 00591)
Values for HUNTER 16 Matrix Code:
 Code  Key              Code    Key             Code    Key
 00h   Esc key          1Eh     Space           3Bh     L
 01h   1                21h     0               3Ch     ,
 02h   Q                22h     -               3Eh     Right shift
 03h   Tab              23h     '               42h     8
 04h   Num Lock         24h     Keypad 4        43h     7
 05h   \                25h     Enter           44h     U
 08h   LShift           26h     Keypad 7        45h     I
 09h   Ctrl             27h     .               46h     J
 0Ah   "Paw" key        28h     Keypad 1        47h     K
 0Bh   2                29h     Keypad 0        48h     M
 0Ch   W                2Ch     =               49h     N
 0Dh   A                2Dh     Backspace       4Ah     /
 0Eh   S                2Eh     Keypad 8        4Dh     6
 0Fh   Z                2Fh     Keypad 9        4Eh     5
 11h   Alt              30h     Keypad 5        4Fh     T
 16h   4                31h     Keypad 6        50h     Y
 17h   3                32h     Keypad 2        51h     G
 18h   E                33h     Keypad 3        52h     H
 19h   R                34h     Keypad .        53h     B
 1Ah   D                37h     9               54h     V
 1Bh   F                38h     O               55h     #
 1Ch   X                39h     P               58h     Pwr
 1Dh   C                3Ah     ;               59h     Shift Pwr
--------b-1625------------------------------------
INT 16 - HUNTER 16 - RESET KEYBOARD
        AH = 25h
Return: AL = 00h
Desc:   restores the standard keyboard layout after any remapping
SeeAlso: AH=24h,AH=2Bh,AH=2Ch
--------K-1625-------------------------------
INT 16 O - K3 v1.5x, K3PLUS v5.xx - COPY INTO EXTENDED BUFFER
        AH = 25h
        CX = number of keystrokes to copy
        ES:SI -> buffer containing keystrokes
Return: CF clear if successful
        CF set on error (i.e. buffer full)
            CX = number of keystrokes NOT transferred
            ES:SI -> first keystroke not transferred
Note:   this function was normally unsupported under K3PLUS v6.00-v6.22 and
          is no longer supported by v6.30+; use AX=AF25h instead
SeeAlso: AH=05h,AH=20h"K3",AX=AF25h,INT 2F/AX=D44Fh/BX=0001h
--------b-1626------------------------------------
INT 16 - HUNTER 16 - CONTROL KEYCLICK
        AH = 26h
        AL = new state of keyclicks (00h disabled, 01h enabled)
Return: AL = 00h
SeeAlso: AH=2Ah
--------b-1627------------------------------------
INT 16 - HUNTER 16 - CONTROL SCREEN DUMP AREA
        AH = 27h
        AL = what to dump
            00h whole (virtual) window
            01h LCD window only
Return: AL = 00h
Desc:   control whether printscren dumps the whole 80x25 screen or only the
          part displayed in the LCD window
Note:   the Hunter 16 has a 240x64 LCD display which serves as a window into
          a 640x200 virtual screen
--------b-1629------------------------------------
INT 16 - HUNTER 16 - GET KEY REPEAT
        AH = 29h
Return: BL = Typematic rate (characters per second) (see #00592)
        BH = delay (00h = 250ms, 01h = 500ms, 02h = 750ms, 03h = 1s)
SeeAlso: AH=03h,AH=2Ah

(Table 00592)
Values for HUNTER 16 Typematic rate:
 00h    30.0     08h    15.0     10h    7.5      18h    3.7
 01h    26.7     09h    13.3     11h    6.7      19h    3.3
 02h    24.0     0Ah    12.0     12h    6.0      1Ah    3.0
 03h    21.8     0Bh    10.9     13h    5.5      1Bh    2.7
 04h    20.0     0Ch    10.0     14h    5.0      1Ch    2.5
 05h    18.5     0Dh     9.2     15h    4.6      1Dh    2.3
 06h    17.1     0Eh     8.6     16h    4.3      1Eh    2.1
 07h    16.0     0Fh     8.0     17h    4.0      1Fh    2.0
SeeAlso: AH=2Ah
--------b-162A------------------------------------
INT 16 - HUNTER 16 - CONTROL KEY REPEAT
        AH = 2Ah
        AL = new state of keyboard autorepeat (00h disabled, 01h enabled)
SeeAlso: AH=03h,AH=26h,AH=29h,AH=2Bh
--------b-162B------------------------------------
INT 16 - HUNTER 16 - REDEFINE KEY SCAN CODES
        AH = 2Bh
        AL = which key table to redefine
            00h unshifted
            01h shifted
            02h Numlock
        BH = standard scan code of key (00h-80h)
        BL = new scan code
Desc:   redefine the generated scan code from BH to BL
SeeAlso: AH=24h,AH=2Ah,AH=2Ch
--------b-162C------------------------------------
INT 16 - HUNTER 16 - REDEFINE RAW KEY CODES
        AH = 2Ch
        AL = Matrix code of key (see AH=29h)
        BL = new key code
Return: AL = status (00h success, nonzero failed)
Desc:   redefine the key code generated by holding the PAW key down and
          pressing the key in AL
SeeAlso: AH=24h,AH=2Bh
--------b-162D------------------------------------
INT 16 - HUNTER 16 - CONTROL BREAK KEYS
        AH = 2Dh
        AL = enabled break keys
            bit 0 Ctrl-C
            bit 1 Ctrl-Break
        BX = 0708h
        CX = 0910h
        DX = 1112h
Return: AL = status (00h success, FFh failed)
SeeAlso: AH=21h"HUNTER"
--------U-163577-----------------------------
INT 16 U - TextWare TWTSR - API
        AX = 3577h
        CX = function
            00CBh ???
                Return: AX = 0000h
                        BX = 0000h
                        DX:CX -> ???
            00CCh uninstall
                Return: AX = status
                            0000h successful
                            FFFDh unable to unload because vectors taken
            00CDh ???
                Return: AX = 0000h
                        BX = 0000h
                        DX:CX -> ???
            other
                Return: AX = 5345h ('SE')
Program: TWTSR is a TSR which allows the TextWare hypertext browser to be
          popped up via hotkey
SeeAlso: AX=D724h
--------U-164252-----------------------------
INT 16 - TEXTCAP 2.0 - INSTALLATION CHECK
        AX = 4252h
Return: AX = 5242h if installed
Program: TEXTCAP 2.0 is a heavily modified (by Gisbert W. Selke) version of
          the PC Magazine utility CAPTURE written by Tom Kihlken
SeeAlso: AX=4253h,AX=4254h
--------U-164253-----------------------------
INT 16 - TEXTCAP 2.0 - UNINSTALL
        AX = 4253h
Return: AX = segment of resident code
Notes:  the uninstall code does not check whether interrupt vectors have been
          chained by other programs
        the caller must free the main memory block (using the returned segment)
SeeAlso: AX=4252h,AX=4254h
--------U-164254-----------------------------
INT 16 - TEXTCAP 2.0 - DUMP TEXT SCREEN TO FILE
        AX = 4254h
Return: AX = status
            4254h if screen dump will be written as soon as disk becomes idle
            5442h if screen dump written
SeeAlso: AX=4252h,AX=4253h
--------e-164500-----------------------------
INT 16 - Shamrock Software EMAIL - GET STATUS
        AX = 4500h
        DL = port number (01h = COM1)
        ES:BX -> 13-byte buffer for ASCIZ name
Return: AX = 4D00h if EMAIL installed on specified port
            ES:BX -> "" if no connection
                  -> "*" if connection but caller has not identified name
                  -> name otherwise
            CX = version (CH = major, CL = minor)
            DL = privilege level of user (00h = guest)
            DH = chosen language (00h German, 01h English)
SeeAlso: AX=4501h,AX=4502h
--------e-164501-----------------------------
INT 16 - Shamrock Software EMAIL - GET ELAPSED ONLINE TIME AND MAXIMUM TIME
        AX = 4501h
        DL = port number (01h = COM1)
Return: AX = 4D00h if EMAIL installed on specified port
            BX = maximum connect time in clock ticks
            CX = maximum connect time for guests (without name) in clock ticks
            DX = elapsed connect time of current user in clock ticks
SeeAlso: AX=4500h
--------e-164502-----------------------------
INT 16 - Shamrock Software EMAIL - GET CURRENT COMMUNICATIONS PARAMETERS
        AX = 4502h
        DL = port number (01h = COM1)
Return: AX = 4D00h if EMAIL installed on specified port
            BL = current value of serial port's Line Control Register
            BH = flags (see #00593)
            CX = selected country code (33 = France, 49 = Germany, etc)
            DX = baudrate divisor (115200/DX = baudrate)
SeeAlso: AX=4500h

Bitfields for Shamrock Software EMAIL flags:
Bit(s)  Description     (Table 00593)
 0      ISO code
 1      pause
 2      linefeed
 3      ANSI sequences
--------e-164503-----------------------------
INT 16 - Shamrock Software EMAIL - SPECIFY COMMAND-WORD FOR USER FUNCTION
        AX = 4503h
        DL = port number (01h = COM1)
        DH = maximum execution time in clock ticks (00h = 5 seconds)
        ES:BX -> ASCIZ string with new user command-word
Return: AX = 4D00h if EMAIL installed on specified port
Notes:  a single user command (consisting of only uppercase letters and digits)
          may be defined, and remains valid until it is overwritten or the
          EMAIL program terminates; the user command must be activated by
          calling AX=4504h at least once.
        an existing command word may be redefined with this function
SeeAlso: AX=4504h,AX=4505h
--------e-164504-----------------------------
INT 16 - Shamrock Software EMAIL - CHECK FOR USER FUNCTION COMMAND-WORD
        AX = 4504h
        DL = port number (01h = COM1)
        ES:BX -> 80-byte buffer for ASCIZ user input line
Return: AX = 4D00h if EMAIL installed on specified port
            DL = flags
                bit 0: user function supported (always set)
                bit 1: user entered user-function command word
            if DL bit 1 set,
                ES:BX buffer contains line entered by user which begins with
                        the defined command word and has been converted to all
                        caps
Note:   caller must process the returned commandline and invoke AX=4505h
          within five seconds with the result of that processing
SeeAlso: AX=4503h,AX=4505h
--------e-164505-----------------------------
INT 16 - Shamrock Software EMAIL - SEND RESULT OF USER FUNCTION
        AX = 4505h
        DL = port number (01h = COM1)
        DH = error flag
            bit 3: set on error
        ES:BX -> ASCIZ text to return to user, max 1024 bytes
Return: AH = 4Dh if EMAIL installed on specified port
        AL = status
            00h successful
            02h unable to perform function (timeout, prev call not complete)
            other error
Notes:  if the error flag in DH is set, the string is not sent and an error
          message is generated instead; if this function is not called within
          five seconds of AX=4504h, EMAIL automatically generates an error
          message
        the string is copied into an internal buffer, allowing this function's
          caller to continue immediately
SeeAlso: AX=4503h,AX=4504h,INT 17/AX=2400h
--------e-164506-----------------------------
INT 16 - Shamrock Software EMAIL - MONITOR XMODEM DOWNLOAD
        AX = 4506h
        DL = port number (01h = COM1)
        ES:BX -> 13-byte buffer for ASCIZ filename
Return: AX = 4D00h if EMAIL installed on specified port
            DH = Xmodem status
                00h no XGET command given
                01h XGET in progress
                02h XGET completed successfully
            ES:BX buffer filled with last filename given to XGET command
                (without path)
Note:   DH=02h will only be returned once per XGET; subsequent calls will
          return DH=00h
SeeAlso: AX=4500h,INT 17/AX=2408h
--------K-164B-------------------------------
INT 16 - Frank Klemm Keyboard Driver v2.0 - API
        AH = 4Bh
        CX = code or action
            0000h-FEFFh key code
            FF00h-FFFFh action (see #00594)
        BL = scan code (normal keys) or scan code + 60h (enhanced keys)
        BH = shift state (see #00595)
Return: CX = previous code or action

(Table 00594)
Values for Frank Klemm Keyboard Driver action code:
 FF00h  no action
 FF01h  hardcopy
 FF02h  left shift
 FF03h  right shift
 FF04h  left Ctrl
 FF05h  right Ctrl
 FF06h  left Alt
 FF07h  right Alt / AltGr
 FF08h  CapsLock
 FF09h  NumLock
 FF0Ah  ScrlLock
 FF0Bh  Insert (returns code 5200h or 52E0h)
 FF0Ch  Pause
 FF0Dh  Ctrl-Break function
 FF0Eh  warm boot via far jump to F000h:FFF0h
 FF0Fh  terminate current program
 FF10h  key for entering keys via Alt-numpad (read-only)
 FF11h  clear keyboard buffer
 FF12h  reset (warmboot on XT)
 FF13h  mouse sensitivity (read-only)
 FF14h  keyjobs (read-only)
 FF15h  SysRq
 FF16h  turn on CPU cache (486+)
 FF17h  turn off CPU cache (486+)
SeeAlso: #00595

(Table 00595)
Values for Frank Klemm Keyboard Driver shift state:
 00h    no shift keys
 01h    either Shift
 02h    either Ctrl
 03h    left Alt
 04h    Ctrl + Alt
---standard keyboard---
 05h    right Alt / AltGr
---Russian keyboard---
 05h    Russian + no shift keys
 06h    Russian + either Shift
SeeAlso: #00594
--------K-164D4F-----------------------------
INT 16 - M16_KBD.COM v5.6 - INSTALLATION CHECK
        AX = 4D4Fh
Return: AX = 6F6Dh if installed
            ES = segment of resident code
Program: M16_KBD is a shareware Cyrillic keyboard driver by I.V. Morozov
SeeAlso: INT 10/AX=1130h/BX=4D4Fh
--------J-165000-----------------------------
INT 16 - KEYBOARD - AX PC - SET KEYBOARD COUNTRY CODE
        AX = 5000h
        BX = country code
            0001h USA (English), 0051h Japan
Return: AL = status
            00h successful
            01h bad country code
            02h other error
Notes:  the K3PLUS v6.00+ INT 16 BIOS replacement will switch between the
          supported country specific layout (e.g. BX=0031h Germany, BX=001Fh
          Netherlands, BX=0020h Belgium, BX=0022h Spain) (as with <Ctrl>+
          <Alt>+<F2>) and K3PLUS' transparent mode (as with <Ctrl>+<Alt>+<F1>).
        In transparent mode (BX=0001h), K3PLUS chains to the underlying
          driver (normally the BIOS driver with US-layout). K3PLUS beeps on
          mode changes
SeeAlso: AX=5001h,AX=AF4Dh,INT 10/AX=5000h,INT 17/AX=5000h
--------J-165001-----------------------------
INT 16 - KEYBOARD - AX PC - GET KEYBOARD COUNTRY CODE
        AX = 5001h
Return: AL = status
            00h successful
                BX = country code
            02h error
Note:   also supported by K3PLUS v6.00+
SeeAlso: AX=5000h,INT 10/AX=5001h,INT 17/AX=5001h
--------J-1651-------------------------------
INT 16 - KEYBOARD - AX PC - READ SHIFT KEY STATUS
        AH = 51h
Return: AL = standard shift key states (see #00582,#00587)
        AH = Kana lock (00h off, 01h on)
Note:   also supported by K3PLUS v6.00+, but K3PLUS always returns AH=00h
SeeAlso: AH=02h,AH=12h,AH=22h
--------t-165453BX5242-----------------------
INT 16 - TSRBONES - INSTALLATION CHECK
        AX = 5453h ('TS')
        BX = 5242h ('RB')
        CX = 4F4Eh ('ON')
        DX = 4553h ('ES')
Return: AX = 4553h if installed
        BX = 4F4Eh if installed
        CX = 5242h if installed
        DX = 5453h if installed
Program: TSRBONES is a skeletal TSR framework by Robert Curtis Davis
Note:   these values are the default as the TSRBONES package is distributed,
          but will normally be changed when implementing an actual TSR with
          the TSRBONES skeleton
SeeAlso: INT 2D/AL=00h"AMIS"
--------K-165472BX4C54-----------------------
INT 16 - TrLit - API
        AX = 5472h ('Tr')
        BX = 4C54h ('Lt')
        CL = function
            00h installation check
                Return: DX = 1234h if installed
                            AX = 100*version (binary, 00E9h = v2.33)
                            CX = resident code segment
            01h get original INT 09 vector
                Return: ES:BX -> previous handler
            02h get original INT 16 vector
                Return: ES:BX -> previous handler
            else chained
        CH = 00h (for backward compatibility with versions before 2.30)
Program: TrLit is a Russian keyboard transliterator by Rostislav Krasny
Index:  installation check;TrLit
--------A-165500-----------------------------
INT 16 C - Microsoft Word internal - MICROSOFT WORD COOPERATION WITH TSR
        AX = 5500h
Return: AX = 4D53h ('MS') if keyboard TSR present
Notes:  during startup, Microsoft Word tries to communicate with any TSRs
          that are present through this call.
        if the return is not 4D53h, Word installs its own INT 09 and INT 16
          handlers; otherwise it assumes that the TSR will handle the keyboard
SeeAlso: AX=55FFh,INT 1A/AX=3601h
--------A-1655FE-----------------------------
INT 16 CU - Microsoft QBASIC internal - MICROSOFT COOPERATION WITH TSR
        AX = 55FEh
        DX = function
            0000h initialize
                ES:BX -> ??? function
                ES:CX -> ??? structure
            FFFFh shutdown/reset
Return: AX = result
            4D4Bh only the INT 1B handler will be installed.
            other: handlers for INT 08, INT 09, INT 16, INT 1B, and INT 1C
                  are installed
Notes:  The pointer in ES:CX seems to point at a structure defining a callback
          function when new keyboard keys are pressed. If a TSR returns
          AX=4D4Bh, QBASIC will stop (with IRQ's and interrupts enabled).
        these calls are also made by MS-DOS 6.0's DOSSHELL at startup, exit,
          and before/after shelling out
        since EDIT.COM and HELP.COM merely invoke QBASIC, those two programs
          will also cause this interface to be invoked
        K3PLUS v6.07+ supports this function, but will never invoke the
          callback function
SeeAlso: AX=5500h,AX=AF4Dh,INT 1A/AX=3601h
--------U-1655FF-----------------------------
INT 16 C - Microsoft Word - TSR COOPERATION???
        AX = 55FFh
        BX >= 0004h (version of Microsoft Word [BL = major] ???)
        CX = function
            0000h set ??? flag
            other clear ??? flag
Notes:  hooks intercepting this call are present in SWAPSH and SWAPDT v1.77j,
          distributed with PC Tools v7, as well as the Trusted Access
          SCRNBLNK.COM; this may be part of the standard TesSeRact library
        known to be called by the German edition of Microsoft Word 5.0
SeeAlso: AX=5500h,INT 2F/AX=5453h
--------c-165758BX4858-----------------------
INT 16 U - Netroom CACHECLK - INSTALLATION CHECK
        AX = 5758h
        BX = 4858h ('HX')
        DX = 4443h ('DC')
        CX <> 5758h
Return: BX = 6878h if installed
        CX = 6463h if installed
            AX = code segment of TSR
            CX = internal version??? (v3.00 returns 0100h)
Program: CACHECLK is a "cloaked" disk cache included with Netroom
Notes:  if CX=5758h on entry, CACHECLK returns with all registers unchanged
        the cache statistics are located early in the segment pointed at by
          AX on return
SeeAlso: INT 2F/AX=5758h
--------m-165758BX5754-----------------------
INT 16 U - Netroom ??? - ???
        AX = 5758h
        BX = 5754h
        ???
Return: ???
--------m-165758BX5755-----------------------
INT 16 U - Netroom ??? - ???
        AX = 5758h
        BX = 5755h
        DS:SI -> ???
Return: ???
--------m-165758BX5756-----------------------
INT 16 U - Netroom ??? - INSTALLATION CHECK
        AX = 5758h
        BX = 5756h
Return: BX <> 5756h if installed
--------m-165758BX5858-----------------------
INT 16 U - Netroom PRENET - GET OLD INTERRUPT VECTORS
        AX = 5758h
        BX = 5858h
Return: CF clear
        DX:BX -> saved copy of interrupt vector table
InstallCheck:   call this function and compare BX against 5858h on return; if
          it has changed, PRENET is installed
SeeAlso: AX=5758h/BX=5859h
Index:  installation check;Netroom PRENET
--------m-165758BX5859-----------------------
INT 16 U - Netroom POSTNET - GET OLD INTERRUPT VECTORS
        AX = 5758h
        BX = 5859h
Return: CF clear
        DX:BX -> saved copy of interrupt vector table
InstallCheck:   call this function and compare BX against 5859h on return; if
          it has changed, POSTNET is installed
SeeAlso: AX=5758h/BX=5858h
Index:  installation check;Netroom POSTNET
----------1667-------------------------------
INT 16 - Doorway v2.x+ - INSTALLATION CHECK / REDIRECTION CONTROLa
        AH = 67h
        AL = Doorway mode
            00h turn off DOS redirection
            01h turn on DOS redirection
Return: AH = 80h if Doorway is actively redirecting output
            AL = 80h if Doorway was already in requested mode
Program: Doorway is a program by Marshall Dudley which allows most DOS programs
          to run as a BBS door without modification
Note:   to perform an installation check without changing the redirection
          state, if is necessary to restore the original mode if AL was not
          80h on return
SeeAlso: INT 10/AH=BBh"Doorway"
--------U-166969BX6968-----------------------
INT 16 - PC Tools v5.1+ BACKTALK - UNHOOK
        AX = 6969h
        BX = 6968h
Return: resident code unhooked, but not removed from memory
Index:  uninstall;BACKTALK
--------U-166969BX6969-----------------------
INT 16 - PC Tools v5.1+ BACKTALK - INSTALLATION CHECK
        AX = 6969h
        BX = 6969h
        DX = 0000h
Return: DX nonzero if installed
            BX = CS of resident code
            DX = PSP segment of resident code
            DS:SI -> ASCIZ identification string "CPoint Talk"
--------i-166A6B-----------------------------
INT 16 U - FastJuice - DISABLE/UNLOAD???
        AX = 6A6Bh
Return: ???
Program: FastJuice is a resident battery-power monitor by SeaSide Software
SeeAlso: AX=7463h
Index:  uninstall;FastJuice
--------G-166C63-----------------------------
INT 16 U - TMED v1.6a - INSTALLATION CHECK
        AX = 6C63h ('lc')
Return: AX = 4C43h ('LC') if installed
Program: TMED is a freeware resident memory editor by Liang Chen
--------U-166D74-----------------------------
INT 16 - MTRTSR - INSTALLATION CHECK
        AX = 6D74h ('mt')
Return: AX = 4D54h ('MT') if installed
Program: MTRTSR is a part of the shareware MTR package by Mechon Mamre which
          permits searching the large corpus of classical Hebrew texts in the
          package
SeeAlso: INT 10/AX=6D74h"MTRFONTS"
--------b-166F00-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_INQUIRE" - Extended BIOS INSTALLATION CHECK
        AX = 6F00h
        BX <> 4850h (usually set to 0000h for simplicity)
Return: BX = 4850h ("HP") if present
Notes:  called by recent MS Mouse drivers looking for an HP-HIL mouse
        supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
SeeAlso: AX=6F01h,AX=6F04h,AX=6F07h,AX=6F09h,AX=6F0Dh,AX=6F11h,AX=6F12h
SeeAlso: INT 14/AX=6F00h,INT 17/AX=6F00h,INT 33/AX=6F00h
SeeAlso: INT 6F/AH=00h"HP Vectra"
--------b-166F01-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_DEF_ATTR" - GET DEFAULT TYPEMATIC VALUES
        AX = 6F01h
Return: AH = 00h (successful)
        CX = 0004h (size of returned buffer)
        ES:SI -> buffer for typematic info (see #00596)
Note:   supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
SeeAlso: AX=6F00h,AX=6F02h,AX=6F03h,AX=6F04h

Format of HP Vectra EX-BIOS typematic info:
Offset  Size    Description     (Table 00596)
 00h    BYTE    delay before repeat for all non-Cursor Control Pad keys
                (see #00597)
 01h    BYTE    typematic rate for all non-Cursor Control Pad keys (see #00598)
 02h    BYTE    delay before repeat for Cursor Control Pad keys (see #00599)
 03h    BYTE    typematic rate for Cursor Control Pad keys (see #00598)

(Table 00597)
Values for HP Vectra EX-BIOS non-CCP delay time:
 00h    17 ms
 01h    150 ms
 02h    283 ms
 03h    417 ms
 04h    550 ms
 05h    683 ms
 06h    817 ms
 07h    950 ms
 08h    1083 ms
 09h    1217 ms
 0Ah    1350 ms
 0Bh    1483 ms
 0Ch    1617 ms
 0Dh    1750 ms
 0Eh    1883 ms
 0Fh    2017 ms
Note:   the above values assume that the key repeat rate has been set to 60 Hz;
          double the times if set to 30 Hz
SeeAlso: #00596,#00598,#00599

(Table 00598)
Values for HP Vectra EX-BIOS typematic rate:
 00h    60 / sec
 01h    30 / sec
 02h    20
 03h    15
 04h    12
 05h    10
 06h    8.57
 07h    7.5
 08h    6.66
 09h    6 / sec
 0Ah    5.45
 0Bh    5
 0Ch    4.62
 0Dh    4.28
 0Eh    4 / sec
 0Fh    typematic disabled
Note:   the above values assume that the key repeat rate has been set to 60 Hz;
          halve the rates if set to 30 Hz
SeeAlso: #00597,#00599

(Table 00599)
Values for HP Vectra EX-BIOS CCP delay time:
 00h    17 ms
 01h    83 ms
 02h    150 ms
 03h    217 ms
 04h    283 ms
 05h    350 ms
 06h    417 ms
 07h    483 ms
 08h    550 ms
 09h    617 ms
 0Ah    683 ms
 0Bh    750 ms
 0Ch    817 ms
 0Dh    883 ms
 0Eh    950 ms
 0Fh    1017 ms
Note:   the above values assume that the key repeat rate has been set to 60 Hz;
          double the times if set to 30 Hz
SeeAlso: #00597,#00598
--------b-166F02-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_GET_ATTR" - GET CURRENT TYPEMATIC VALUES
        AX = 6F02h
Return: AH = 00h (successful)
        CX = 0004h (size of returned buffer)
        ES:SI -> buffer for typematic info (see #00596)
Note:   supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
SeeAlso: AX=6F00h,AX=6F02h,AX=6F03h,AX=6F04h
SeeAlso: AX=6F00h,AX=6F01h,AX=6F03h
--------b-166F03-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_SET_ATTR" - SET TYPEMATIC VALUES
        AX = 6F03h
        ES:SI -> buffer containing typematic info (see #00596)
Return: AH = 00h (successful)
Note:   supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
SeeAlso: AX=6F00h,AX=6F02h,AX=6F03h,AX=6F04h
SeeAlso: AX=6F00h,AX=6F01h,AX=6F02h
--------b-166F04-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_DEF_MAPPING" - GET DEFAULT KEY MAPPINGS
        AX = 6F04h
        ES:SI -> mapping buffer (see #00600)
Return: AH = 00h (successful)
        CX = 001Eh (number of bytes in buffer)
        ES:SI buffer filled
Notes:  supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
        the HIL input system translates the HIL keyboard events to simulate
          an IBM-compatible keyboard; the translation can be altered
          dynamically by applications
SeeAlso: AX=6F00h,AX=6F05h,AX=6F06h

Format of HP Vectra EX-BIOS keyboard mapping info:
Offset  Size    Description     (Table 00600)
 00h  3 WORDs   entry for V_QWERTY driver (IP, CS, DS)
 06h  3 WORDs   entry for V_SOFTKEY driver (IP, CS, DS)
 0Ch  3 WORDs   entry for V_FUNCTION driver
 12h  3 WORDs   entry for V_NUMPAD driver
 18h  3 WORDs   entry for V_CCP driver
--------b-166F05-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_GET_MAPPING" - GET CURRENT KEY MAPPINGS
        AX = 6F05h
        ES:SI -> mapping buffer (see #00600)
Return: AH = 00h (successful)
        CX = 001Eh (number of bytes in buffer)
        ES:SI buffer filled
Note:   supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
SeeAlso: AX=6F04h,AX=6F06h
--------b-166F06-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_SET_MAPPING" - SET KEY MAPPINGS
        AX = 6F06h
        CX = number of bytes in buffer (001Eh)
        ES:SI -> mapping buffer (see #00600)
Return: AH = 00h (successful)
Notes:  supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
        any application which modifies the key mappings should restore them
          before terminating
        drivers installed with this function are assured of 32 bytes of stack
          space when they are invoked
SeeAlso: AX=6F04h,AX=6F05h,AX=6F07h
--------b-166F07-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_SET_XLATORS" - SET CCP AND SOFTKEY PADS
        AX = 6F07h
        BL = translation to set (see #00601)
Return: AH = 00h (successful)
Notes:  supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
        this function may no longer work properly if the application has
          modified the key mappings with AX=6F06h
SeeAlso: AX=6F06h,AX=6F09h

(Table 00601)
Values for HP Vectra keyboard translation specifier:
 00h    map V_CCP to V_CCPCUR, forcing the cursor pad to return cursor keys
 01h    map V_CCP to V_CCPNUM, forcing the cursor pad to always return numbers
 02h    map V_CCP to V_OFF, disabling the cursor pad
 03h    map V_CCP to V_CCPGID, converting cursor pad keys to GID data
 04h    map V_CCP to V_RAW, passing cursor pad data untranslated to INT 09
 05h    map V_SOFTKEY to V_SKEY2KFEY, translating into standard function keys
 06h    map V_SOFTKEY to V_RAW, passing Softkey scancodes direct to INT 09
 07h    map V_SOFTKEY to V_OFF, disabling HP Softkeys
SeeAlso: #00602

(Table 00602)
Values for HP Vectra scancodes and BIOS keycodes for V_RAW translator:
              INT 09             INT 16 keycode
    Key      scan code  Default  Shifted   Ctrl      Alt
 * (NumPd)      37h     2Ah      (Prt Sc)  00/72h    00/37H
 Sysreq         54h       --     --        --        --
 CCP-Up         60h     00/D9h   00/BFh    00/A5h    00/8BH
 CCP-Left       61h     00/DAh   00/C0h    00/A6h    00/8CH
 CCP-Down       62h     00/DBh   00/C1h    00/A7h    00/8DH
 CCP-Right      63h     00/DCh   00/C2h    00/A8h    00/8EH
 CCP-Home       64h     00/DDh   00/C3h    00/A9h    00/8FH
 CCP-PgUp       65h     00/DEh   00/C4h    00/AAh    00/90H
 CCP-End        66h     00/DFh   00/C5h    00/ABh    00/91H
 CCP-PgDn       67h     00/E0h   00/C6h    00/ACh    00/92H
 CCP-Ins        68h     00/E1h   00/C7h    00/ADh    00/93H
 CCP-Del        69h     00/E2h   00/C8h    00/AEh    00/94H
 CCP-CNTR       6Ah     00/E3h   00/C9h    00/AFh    00/95H
 f1             70h     00/E9h   00/CFh    00/B5h    00/9BH
 f2             71h     00/EAh   00/D0h    00/B6h    00/9CH
 f3             72h     00/EBh   00/D1h    00/B7h    00/9DH
 f4             73h     00/ECh   00/D2h    00/B8h    00/9EH
 f5             74h     00/EDh   00/D3h    00/B9h    00/9FH
 f6             75h     00/EEh   00/D4h    00/BAh    00/A0H
 f7             76h     00/EFh   00/D5h    00/BBh    00/A1H
 f8             77h     00/F0h   00/D6h    00/BCh    00/A2H
Note:   only HP-specific codes are listed in this table; see INT 09 for a full
          list of standard scan codes
SeeAlso: #00006,#00601
--------b-166F08-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_KBD" - GET KEYBOARD INFORMATION
        AX = 6F08h
Return: AH = status
           00h successful
           02h unsupported (non-HIL, i.e. standard, keyboard)
        BH = HP-HIL address (HP Vectra AT only???)
        BL = HP-HIL ID (HP Vectra AT only???)
        BL = keyboard language (ES/QS/RS only???) (see #00603)
Notes:  supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
        the driver's address in the HP_VECTOR_TABLE (see INT 6F/AH=00h) may
          be computed as (BH-1)*6 + N, where N is the address of the first
          HP-HIL device driver (see INT 6F/AH=0Ah"F_INQUIRE_FIRST")
SeeAlso: AX=6F05h,AX=6F09h,INT 6F/AH=0Ah"F_INQUIRE_FIRST"

(Table 00603)
Values for HP HIL keyboard language code:
 00h    reserved
 01h    Arabic-French
 02h    Kanji
 03h    Swiss-French
 04h    Portugese
 05h    Arabic
 06h    Hebrew
 07h    Canadian-English
 08h    Turkish
 09h    Greek
 0Ah    Thai
 0Bh    Italian
 0Ch    Hangul (Korean)
 0Dh    Dutch
 0Eh    Swedish
 0Fh    German
 10h    Chinese (PRC)
 11h    Chinese (Taiwan)
 12h    Swiss (French ii)
 13h    Spanish
 14h    Swiss (German ii)
 15h    Belgian (Flemish)
 16h    Finnish
 17h    United Kingdom
 18h    French-Canadian
 19h    French-German
 1Ah    Norwegian
 1Bh    French
 1Ch    Danish
 1Dh    Katakana
 1Eh    Latin American Spanish
 1Fh    United States-American
 20h-FEh reserved
 FFh    non-HP keyboard (IBM AT keyboard and IBM Enhanced keyboard)
--------b-166F09-----------------------------
INT 16 - HP Vectra EX-BIOS - "F16_KBD_RESET" - RESET KEYBOARD TO DEFAULTS
        AX = 6F09h
Return: AH = 00h (successful)
Desc:   reset all keyboard mappings to their default translators, and reset
          typematic values to their defaults
Note:   supported by the original HP Vectra AT and ES/QS/RS series HP Vectras
SeeAlso: AX=6F04h,AX=6F07h,AX=6F08h
--------b-166F0A-----------------------------
INT 16 - HP Vectra ES/QS/RS EX-BIOS - READ PROCESSOR SPEED
        AX = 6F0Ah
Return: AH = 00h (successful)
        BX = speed code
            0Bh for low speed (see #00604)
            12h for medium speed (see #00604)
            0Ch for high speed (see #00604)
Note:   supported by ES, QS, and RS series of HP Vectras
SeeAlso: AX=6F00h

(Table 00604)
Values for HP Vetra CPU speed:
        Vectra          Low         Medium      High
        ES              8 MHz        -           8 MHz
        ES/12           8 MHz        -          12 MHz
        QS/16, RS/16    8 MHz        -          16 MHz
        QS/16S          8 MHz        -          16 MHz
        QS/20, RS/20    8 MHz        -          20 MHz
        RS/20C          5 MHz       10 MHz      20 MHz
        RS/25C          5 MHz       12.5 MHz    25 MHz
--------b-166F0B-----------------------------
INT 16 - HP Vectra ES/QS/RS EX-BIOS - SET PROCESSOR SPEED TO LOW
        AX = 6F0Bh
Return: AH = 00h (successful)
Notes:  see AX=6F0Ah for speed definitions
        supported by ES, QS, and RS series of HP Vectras
SeeAlso: AX=6F00h,AX=6F0Ah
--------b-166F0C-----------------------------
INT 16 - HP Vectra ES/QS/RS EX-BIOS - SET PROCESSOR SPEED TO HIGH
        AX = 6F0Ch
Return: AH = 00h (successful)
Notes:  see AX=6F0Ah for speed definitions
        supported by ES, QS, and RS series of HP Vectras
SeeAlso: AX=6F00h,AX=6F0Ah
--------b-166F0D-----------------------------
INT 16 - HP Vectra ES/QS/RS EX-BIOS - GET HIL Extended BIOS INTERRUPT NUMBER
        AX = 6F0Dh
Return: AH = interrupt number (default 6Fh, 02h means 6Fh as well)
Notes:  supported by ES, QS, and RS series of HP Vectras
        called by MS Windows HPSYSTEM.DRV and HPEBIOS.386 to support the HP-HIL
          input system
SeeAlso: AX=6F00h,AX=6F0Eh,INT 6F/AH=00h"HP Vectra",INT 6F/AH=0Ah"HP"
--------b-166F0E-----------------------------
INT 16 - HP Vectra ES/QS/RS EX-BIOS - SET HIL Extended BIOS INTERRUPT NUMBER
        AX = 6F0Eh
        BL = new interrupt number (60h-6Fh,78h-7Fh)
Return: AH = status (00h = successful)
Desc:   allows the HIL Extended BIOS software to use a non-default interrupt
          number in case of an interrupt conflict with another application
Notes:  supported by ES, QS, and RS series of HP Vectras
        called by MS Windows HPSYSTEM.DRV and HPEBIOS.386 to support the HP-HIL
          input system
SeeAlso: AX=6F00h,AX=6F0Dh,INT 6F/AH=00h"HP",INT 6F/AH=0Ah"HP"
--------b-166F0F-----------------------------
INT 16 - HP Vectras RS/20C and RS/25C - ENABLE MEMORY CACHING
        AX = 6F0Fh
Return: AH = status
            00h successful
            FEh cache subsystem is bad
SeeAlso: AX=6F00h,AX=6F10h,AX=6F11h
--------b-166F10-----------------------------
INT 16 - HP Vectras RS/20C and RS/25C - DISABLE MEMORY CACHING
        AX = 6F10h
Return: AH = 00h (successful)
SeeAlso: AX=6F00h,AX=6F0Fh,AX=6F11h
--------b-166F11-----------------------------
INT 16 - HP Vectras RS/20C and RS/25C - GET MEMORY CACHING STATE
        AX = 6F11h
Return: AH = 00h (successful)
        AL bit 0 = cache state
            0 cache disabled
            1 cache enabled
SeeAlso: AX=6F00h,AX=6F0Fh,AX=6F10h
--------b-166F12-----------------------------
INT 16 - HP Vectras RS/20C and RS/25C - SET PROCESSOR SPEED TO MEDIUM
        AX = 6F12h
Return: AH = 00h (successful)
Note:   see AX=6F0Ah for speed definitions
SeeAlso: AX=6F00h,AX=6F0Ah
--------K-1670-------------------------------
INT 16 - FAKEY.COM - INSTALLATION CHECK
        AH = 70h
Return: AX = 1954h if installed
Program: FAKEY is a keystroke faking utility by System Enhancement Associates
--------K-1671-------------------------------
INT 16 - FAKEY.COM - PUSH KEYSTROKES
        AH = 71h
        CX = number of keystrokes
        DS:SI -> array of words containing keystrokes to be returned by AH=00h
Program: FAKEY is a keystroke faking utility by System Enhancement Associates
SeeAlso: AH=05h,AH=72h
--------K-1672-------------------------------
INT 16 - FAKEY.COM - CLEAR FAKED KEYSTROKES
        AH = 72h
Program: FAKEY is a keystroke faking utility by System Enhancement Associates
SeeAlso: AH=71h
--------K-1673-------------------------------
INT 16 - FAKEY.COM - PLAY TONES
        AH = 73h
        CX = number of tones to play
        DS:SI -> array of tones (see #00605)
Program: FAKEY is a keystroke faking utility by System Enhancement Associates
SeeAlso: INT 15/AX=1019h

Format of FAKEY.COM tone array entries:
Offset  Size    Description     (Table 00605)
 00h    WORD    divisor for timer channel 2
 02h    WORD    duration in clock ticks
--------i-167463-----------------------------
INT 16 U - FastJuice - INSTALLATION CHECK
        AX = 7463h ("tc")
Return: AX = 5443h ("TC") if installed
Program: FastJuice is a resident battery-power monitor by SeaSide Software
SeeAlso: AX=6A6Bh
--------R-1675-------------------------------
INT 16 - pcANYWHERE III - SET TICK COUNT FOR SCANNING
        AH = 75h
        AL = number of ticks between checks for new screen changes
--------R-1676-------------------------------
INT 16 - pcANYWHERE III - SET ERROR CHECKING TYPE
        AH = 76h
        AL = error checking type
            00h none
            01h fast
            02h slow
--------R-1677-------------------------------
INT 16 - pcANYWHERE III - LOG OFF
        AH = 77h
        AL = mode
            00h wait for another call
            01h leave in Memory Resident Mode
            02h leave in Automatic Mode
            FFh leave in current operating mode
--------U-167761-----------------------------
INT 16 - WATCH.COM v2.x-v3.0 - INSTALLATION CHECK
        AX = 7761h ('wa')
Return: AX = 5741h ('WA') if installed
Note:   WATCH.COM is part of the "TSR" package by Kim Kokkonen
SeeAlso: INT 21/AX=7761h
--------U-167788BX7789-----------------------
INT 16 - PC Magazine PUSHDIR.COM - INSTALLATION CHECK
        AX = 7788h
        BX = 7789h
        DS:SI -> signature "PUSHDIR VERSION 1.0"
Return: AX = 7789h if installed and signature correct
        BX = 7788h
        SI destroyed
--------R-1679-------------------------------
INT 16 - pcANYWHERE III - CHECK STATUS
        AH = 79h
Return: AX = status
            FFFFh if resident and active
            FFFEh if resident but not active
            FFFDh if in Memory Resident mode
            FFFCh if in Automatic mode
            other value if not resident
SeeAlso: AX=7B00h,INT 21/AX=2B44h
--------R-167A-------------------------------
INT 16 - pcANYWHERE III - CANCEL SESSION
        AH = 7Ah
--------R-167B00-----------------------------
INT 16 - pcANYWHERE III - SUSPEND
        AX = 7B00h
SeeAlso: AH=79h,AX=7B01h
--------R-167B01-----------------------------
INT 16 - pcANYWHERE III - RESUME
        AX = 7B01h
SeeAlso: AH=79h,AX=7B00h
--------R-167C-------------------------------
INT 16 - pcANYWHERE III - GET PORT CONFIGURATION
        AH = 7Ch
Return: AH = port number
        AL = baud rate (see #00606)
SeeAlso: AX=7B00h,AH=7Eh

(Table 00606)
Values for pcANYWHERE III baud rate:
 00h    50 baud
 01h    75 baud
 02h    110 baud
 03h    134.5 baud
 04h    150 baud
 05h    300 baud
 06h    600 baud
 07h    1200 baud
 08h    1800 baud
 09h    2000 baud
 0Ah    2400 baud
 0Bh    4800 baud
 0Ch    7200 baud
 0Dh    9600 baud
 0Eh    19200 baud
SeeAlso: #00309
--------R-167D-------------------------------
INT 16 - pcANYWHERE III - GET/SET TERMINAL PARAMETERS
        AH = 7Dh
        AL = subfunction
            00h set terminal parameters
            01h get terminal parameters
            02h get configuration header and terminal parameters
        DS:CX -> terminal parameter block
SeeAlso: AH=7Ch,AH=7Eh
--------R-167E-------------------------------
INT 16 - pcANYWHERE III - COMMUNICATIONS I/O THROUGH PORT
        AH = 7Eh
        AL = subfunction
            01h port input status
                Return AX = 0 if no characer ready,
                       AX = 1 if character ready
            02h port input character
                Return AL = received character
            03h port output character in CX
            11h hang up phone
SeeAlso: AH=7Ch
--------R-167F-------------------------------
INT 16 - pcANYWHERE III - SET KEYBOARD/SCREEN MODE
        AH = 7Fh
        AL = subfunction
            00h enable remote keyboard only
            01h enable host keyboard only
            02h enable both keyboards
            08h display top 24 lines
            09h display bottom 24 lines
            10h Hayes modem
            11h other modem
            12h direct connect
--------U-1680-------------------------------
INT 16 - MAKEY.COM - INSTALLATION CHECK
        AH = 80h
Return: AX = 1954h if installed
Program: MAKEY is a utility by System Enhancement Associates
--------K-1687-------------------------------
INT 16 - DK.COM v1.03 - INSTALLATION CHECK
        AH = 87h
Return: AX = 4A57h ('JW') if installed
Program: DK.COM is the resident part of a small keyboard macro utility
          by Digital Mechanics.
--------U-168765BX4321-----------------------
INT 16 - AT.COM version 8/26/87 - API
        AX = 8765h
        BX = 4321h
        CX = ??? or FFFFh
        if CX = FFFFh
                DX = number of event to remove or FFFFh
Return: ES:BX -> event record array (see #00607)
Program: AT.COM is a resident scheduler by Bill Frolik

Format of AT.COM event record:
Offset  Size    Description     (Table 00607)
 00h    BYTE    in-use flag (00h free, 01h in use, FFh end of array)
 01h    BYTE    day of date on which to trigger
 02h    BYTE    month of date on which to trigger
 03h    BYTE    trigger time, minute
 04h    BYTE    trigger time, hour
 05h    WORD    offset of command to be executed
--------K-1692-------------------------------
INT 16 - KEYB.COM KEYBOARD CAPABILITIES CHECK (not an actual function!)
        AH = 92h
Return: AH <= 80h if enhanced keyboard functions (AH=10h-12h) supported
Desc:   this function is called by the DOS 3.2 KEYBxx.COM and DOS 5+ KEYB.COM
          to determine the highest supported keyboard function
Note:   many BIOSes (including at least some versions of Phoenix and AMI) will
          destroy AH on return from functions higher than AH=12h, returning
          12h less than was in AH on entry (due to a chain of DEC/JZ
          instructions)
SeeAlso: AH=05h"PCjr",AH=A2h,INT 2F/AX=AD80h
--------U-1699-------------------------------
INT 16 - SCOUT v5.4 - GET ???
        AH = 99h
Return: AX = ABCDh
        BX:CX -> ??? (appears to be start of PSP for resident portion)
Program: Scout is a memory-resident file manager by New-Ware
SeeAlso: AH=9Eh
--------U-169E-------------------------------
INT 16 - SCOUT v5.4 - INSTALLATION CHECK
        AH = 9Eh
Return: AX = ABCDh if installed
Program: Scout is a memory-resident file manager by New-Ware
SeeAlso: AH=99h
--------K-16A2-------------------------------
INT 16 - KEYB.COM KEYBOARD CAPABILITIES CHECK (not an actual function!)
        AH = A2h
Return: AH <= 80h if 122-key keyboard functions (AH=20h-22h) supported
Desc:   this function is called by the DOS 3.2 KEYBxx.COM and DOS 5+ KEYB.COM
          to determine the highest supported keyboard function
Note:   many BIOSes (including at least some versions of Phoenix and AMI) will
          destroy AH on return from functions higher than AH=12h, returning
          12h less than was in AH on entry (due to a chain of DEC/JZ
          instructions)
SeeAlso: AH=05h"PCjr",AH=92h,INT 2F/AX=AD80h
--------V-16AA-------------------------------
INT 16 - PTxxx.COM - (xxx=CGA,EGA,VGA,HER...) CALL GATE FOR GRAPHICS
        AH = AAh
        Various registers set up by high level language.
Return: Graphics performed
Note:   PT stands for Paint Tools which is a graphics library for Turbo Pascal,
          Modula 2 and others from DataBiten in Sweden. The library is
          installed as a memory resident driver.
--------U-16AABBBXEEFF-----------------------
INT 16 U - JORJ v4.3 - INSTALLATION CHECK
        AX = AABBh
        BX = EEFFh
Return: AX = EEFFh if installed
        BX = AABBh if installed
            CL = hotkey name (default 6Ah 'j' for Alt-J)
Program: JORJ is a shareware dictionary with phonetic lookup by Jorj Software
          Co.
Index:  hotkeys;JORJ
--------K-16AF20BX4B33-----------------------
INT 16 - K3PLUS v6.00+ (API v2.0+) - GET EXTENDED BUFFER STATE
        AX = AF20h
        BX = 4B33h ('K3')
Return: AX = K3 version (same as returned in BX by AX=AF4Dh)
        ES:BX -> extended keyboard buffer start
        ES:DX -> extended keyboard buffer end
        ES:SI -> next keystroke
        ES:DI -> last keystroke in buffer
        CX = number of keystrokes in buffer
Program: K3PLUS is an extended keyboard driver by Matthias Paul and Axel C.
          Frinke, originally based on the K3 extended German keyboard driver
          by Martin Gerdes published in c't magazine in 1988
Note:   this function replaces the identical function AH=20h"K3"
SeeAlso: AH=20h"K3",AX=AF25h,AX=AF4Dh,AX=AF50h,INT 2F/AX=ED58h
--------K-16AF25BX4B33-----------------------
INT 16 - K3PLUS v6.00+ (API v2.0+) - COPY INTO EXTENDED BUFFER
        AX = AF25h
        BX = 4B33h ('K3')
        CX = number of keystrokes to copy
        ES:SI -> buffer containing keystrokes
Return: CF clear if successful
        CF set on error (i.e. buffer full)
            CX = number of keystrokes NOT transferred
            ES:SI -> first keystroke not transferred
Note:   this function replaces the identical function AH=25h"K3"
SeeAlso: AH=25h"K3",AX=AF20h,AX=AF4Dh,AX=AF50h,INT 2F/AX=D44Fh/BX=0001h
--------K-16AF4DBX4B33-----------------------
INT 16 - K3PLUS v6.00+ (API v2.0+) - GET VERSION INFORMATION
        AX = AF4Dh
        BX = 4B33h ('K3')
Return: AL = 50h if installed
            BX = K3 version
            DX = API version
            ES:CX -> K3 structure (version-dependent) (see #00608)
Program: K3PLUS is an extended keyboard driver by Matthias Paul and Axel C.
          Frinke, originally based on the K3 extended German keyboard driver
          by Martin Gerdes published in c't magazine in 1988
SeeAlso: AX=AF20h,AX=AF50h,AX=AF80h,AX=AF82h/BX=4B33h,INT 2F/AX=D44Fh/BX=0000h
SeeAlso: INT 2F/AX=ED58h
Index:  installation check;K3PLUS

Format of internal K3 structure:
Offset  Size    Description     (Table 00608)
 00h  3 BYTEs   signature "K3$"
 03h    BYTE    length of structure, including this byte and signature
 04h    WORD    compiler switch option flags A (see #00609)
 06h    WORD    compiler switch option flags B (see #00610)
 08h    BYTE    internal flags A (see #00611)
 09h    BYTE    internal flags B (see #00612)
 0Ah    WORD    DOS version recorded at startup
 0Ch    WORD    "ActTypeSpeed"
 0Eh    WORD    last Keyboard-ID sent
                41ABh translated, 83ABh native (pass-through)
 10h    WORD    offset of K3TAB Special
 12h    WORD    offset of K3TAB German
 14h    WORD    offset of K3TAB Alt
 16h    WORD    offset of K3TAB AltGr
 18h    WORD    offset of K3TAB Ctrl
 1Ah    WORD    offset of K3TAB NPad
 1Ch    WORD    offset of K3TAB CtrlNPad
 1Eh    WORD    offset of K3TAB AltNPad
 20h    WORD    offset of K3TAB ApoTbl or 0000h
 22h    WORD    offset of K3TAB UmlautTbl or 0000h
 24h    WORD    offset of K3TAB UmlautTblExp or 0000h
 26h    WORD    length of video mode table
 28h    WORD    offset of VidMdTbl or 0000h
 2Ah    BYTE    '$' end marker

Bitfields for K3PLUS compiler switch option flags A:
Bit(s)  Description     (Table 00609)
 15     GuINT16Fct2 (general use of INT 16 function 2)
 14     Int15df (INT 15 has to be predefined)
 13     GuAltNP (general use of Alt Numpad)
 12     SupAT (ATs+ supported)
 11     GuINT16Fct3 (general use of INT 16 function 3)
 10     GuINT16Ret (general use of INT16 bad function return)
 9-8    Layout (0-2, 3 reserved; 0=PC, 1=AT, 2=MF)
 7      ForceMF (force MF decode without read-ID)
 6      KXlate (translate keys for special keyboard)
 5      UmlautX (umlaut translation capability included)
 4      ApoX (translate apostrophe)
 3      DoINT16 (INT 16 handler included)
 2      UseCC (CopyCursor included)
 1-0    UseEB
        0=no extended keystroke buffer, 1=reserve mem, 2=use PSP, 3=reserved

Bitfields for K3 compiler switch option flags B:
Bit(s)  Description     (Table 00610)
 15-11  reserved (0)
 10     CtrlSeq (Ctrl macro capability included)
 9-8    SupINT16fct55FE
 6      DoInstallCheck (check for double installation)
 5      SupINT16fct5PcJr (INT 16/AH=05h"PCjr" supported)
 4      SendOut (sound and message output supported)
 3      SupInt16fct5500 (INT 16/AX=5500h supported)
 2      GuINT15Fct4F (calls to INT 15/AH=4Fh supported)
 1-0    UseBufferStart (0=use standard area, 1=set standard area,
        2=use internal indexes, 3=reserved)

Bitfields for K3 internal flags A:
Bit(s)  Description     (Table 00611)
 7      DoingUmlautExp
 6      CallINT15fct4F
 5      Beep1 (requires SendOut set in option flags B)
 4      ATflag (set for AT, 386, PS/2 Models 50-80)
 3      XTflag (set for PC, PC/XT, Micromint PC, Pencock PC, PS/2 Model 30)
 2      KeyClick
 1      UmlautExp
 0      UmlautTrans

Bitfields for K3 internal flags B:
Bit(s)  Description     (Table 00612)
 7-5    reserved
 4      TranslateE0 enabled
 3      Boot enabled
 2      PrintScreen enabled
 1      Break enabled
 0      ApoPendingBeep
--------K-16AF50BX4B33-----------------------
INT 16 - K3PLUS v6.00+ (API v2.0+) - CHECK IF FUNCTION SUPPORTED
        AX = AF50h
        BX = 4B33h ('K3')
        CH = function
            00h get function flags
                CL = 00h
                Return: CX = supported function flags (see #00613)
            nonzero reserved for extensions
SeeAlso: AX=AF20h,AX=AF4Dh,AX=AF51h,AX=AF80h

Bitfields for K3PLUS supported function list:
Bit(s)  Description     (Table 00613)
 0      function 4Dh supported
 1      function 50h supported
 2-3    reserved (0)
 4      function 20h supported
 5      function 25h supported
 6      function 51h supported
 7      reserved (0)
 8      function 80h supported
 9      function 81h supported
 10     function 82h supported
 11-15  reserved (0)
--------K-16AF51BX4B33-----------------------
INT 16 - K3PLUS v6.00+ (API v2.00+) - SET OPTIONS
        AX = AF51h
        BX = 4B33h ('K3')
        CX = switches
Return: AL = status
            00h done
                CX = previous switch settings
            01h switch not supported
            FFh other error
SeeAlso: AX=AF4Dh,AX=AF50h,AX=AF80h
--------K-16AF80BX4B33-----------------------
INT 16 - K3PLUS v6.00+ (API v2.00+) - GET ORIGINAL INT 09h VECTOR
        AX = AF80h
        BX = 4B33h ('K3')
Return: AL = status
            00h not supported
            81h if successful
                ES:CX -> original INT 09 handler
SeeAlso: AX=AF4Dh,AX=AF50h,AX=AF81h,AX=AF82h
--------K-16AF81BX4B33-----------------------
INT 16 - K3PLUS v6.00+ (API v2.00+) - GET ORIGINAL INT 16h HANDLER
        AX = AF81h
        BX = 4B33h ('K3')
Return: AL = status
            00h not supported
            82h if successful
                ES:CX -> original INT 16 handler
SeeAlso: AX=AF4Dh,AX=AF50h,AX=AF80h,AX=AF82h
--------K-16AF82BX4B33-----------------------
INT 16 - K3PLUS v6.00+ (API v2.00+) - GET ORIGINAL INT 10h HANDLER
        AX = AF82h
        BX = 4B33h ('K3')
Return: AL = status
            00h not supported
            83h if successful
                ES:CX -> original INT 10 handler
Program: K3PLUS is an extended keyboard driver by Matthias Paul and Axel C.
          Frinke, originally based on the K3 extended German keyboard driver
          by Martin Gerdes published in c't magazine in 1988
SeeAlso: AX=AF4Dh,AX=AF50h,AX=AF80h,AX=AF81h,INT 2F/AX=ED58h
--------m-16B0B1-----------------------------
INT 16 - VGARAM v1.00 - INSTALLATION CHECK
        AX = B0B1h
        ES:DI -> 6 byte signature "VGARAM"
Return: AX = B1B0h if installed,
        DS:BX -> VGARAM Status byte: 0 = OFF, 1 = ON
Program: VGARAM is a utility by Brett Warthen which makes VGA memory which is
          not used in text modes available for DOS
--------K-16CA--BX736B-----------------------
INT 16 - CtrlAlt Associates STACKEY.COM v3.00 - API
        AH = CAh
        BX = 736Bh ("sk")
        CX = 736Bh
        AL = function
            00h installation check
                Return: DX = words available in keyboard buffer
            01h place keystroke in buffer
                DX = keystroke (DH = scan code, DL = ASCII character)
                Return: DX = words available in keyboard buffer
                            FFFFh on error
            02h flush STACKEY and BIOS keyboard buffers
Return: AX = CAFFh if installed
            BX = segment of resident code
            CX = STACKEY version (CH = major, CL = minor)
Program: STACKEY is a shareware keyboard-input faking TSR
Index:  installation check;STACKEY
--------V-16CA00BX6570-----------------------
INT 16 - CtrlAlt Associates EGAPAL.COM v1.00 - INSTALLATION CHECK
        AX = CA00h
        BX = 6570h ("ep")
        CX = 6570h
Return: AX = CAFFh if installed
            BX = segment of resident code
            CX = ??? (0090h)
Program: EGAPAL is a TSR supplied with STACKEY which makes EGA palette
          settings permanent across mode switches
SeeAlso: AX=CA00h/BX=7670h
--------V-16CA00BX7670-----------------------
INT 16 - CtrlAlt Associates VGAPAL.COM v1.00 - INSTALLATION CHECK
        AX = CA00h
        BX = 7670h ("vp")
        CX = 7670h
Return: AX = CAFFh if installed
            BX = segment of resident code
            CX = ??? (0090h)
Program: VGAPAL is a TSR supplied with STACKEY which makes VGA palette
          settings permanent across mode switches
SeeAlso: AX=CA00h/BX=6570h
--------U-16CB00-----------------------------
INT 16 - PUPClip v1.12+ - INSTALLATION CHECK
        AX = CB00h
Return: BX = 4342h if installed
            AX = version (AH = major version, AL = BCD minor version)
Program: PUPClip is the freeware PopUP Clipboard for DOS and Windows DOS
         sessions by SkullC0DEr
SeeAlso: AX=CB01h,AX=CB02h,AX=CB03h,AX=CB04h,AX=CB05h,AX=CB06h,AX=CB08h
SeeAlso: INT 2F/AX=1701h
--------U-16CB01-----------------------------
INT 16 - PUPClip v1.12+ - GET CLIPBOARD CURSOR POSITION
        AX = CB01h
Return: BL = column (0-79)
        BH = row (0-49)
SeeAlso: AX=CB00h,AX=CB02h,AX=CB03h
--------U-16CB02-----------------------------
INT 16 - PUPClip v1.12+ - SET CLIPBOARD CURSOR POSITION
        AX = CB02h
        BL = column (0-79)
        BH = row (0-49)
Return: CF clear if successful
        CF set on error (invalid position)
SeeAlso: AX=CB00h,AX=CB01h,AX=CB04h
--------U-16CB03-----------------------------
INT 16 - PUPClip v1.12+ - GET CHARACTER FROM CURRENT CLIPBOARD CURSOR POSITION
        AX = CB03h
Return: BL = ASCII character at current position
SeeAlso: AX=CB00h,AX=CB02h,AX=CB04h,INT 2F/AX=1705h
--------U-16CB04-----------------------------
INT 16 - PUPClip v1.12+ - WRITE CHARACTER TO CURRENT CLIPBOARD CURSOR POSITION
        AX = CB04h
        BL = ASCII character to store
SeeAlso: AX=CB00h,AX=CB02h,AX=CB03h,AX=CB05h,INT 2F/AX=1703h
--------U-16CB05-----------------------------
INT 16 - PUPClip v1.12+ - CLEAR CLIPBOARD CONTENTS
        AX = CB05h
Return: nothing
SeeAlso: AX=CB00h,AX=CB04h,AX=CB06h,AX=CB07h,INT 2F/AX=1702h
--------U-16CB06-----------------------------
INT 16 - PUPClip v1.12+ - SCROLL UP CLIPBOARD CONTENTS
        AX = CB06h
Return: nothing
SeeAlso: AX=CB00h,AX=CB05h,AX=CB07h
--------U-16CB07-----------------------------
INT 16 - PUPClip v1.12+ - SCROLL DOWN CLIPBOARD CONTENTS
        AX = CB07h
Return: nothing
SeeAlso: AX=CB00h,AX=CB05h,AX=CB06h
--------U-16CB08-----------------------------
INT 16 - PUPClip v1.12+ - POP UP
        AX = CB08h
Return: CF clear if successful
        CF set on error (unsupported video mode)
SeeAlso: AX=CB00h
--------U-16D724CX00CB-----------------------
INT 16 U - APCAL v3.20 - GET ???
        AX = D724h
        CX = 00CBh
Return: AX = 0000h
        BX = 0000h
        DX:CX -> ??? or 0000h:0000h
Program: APCAL is an optionally-resident shareware appointment calendar by
          Gamma Software
SeeAlso: AX=3577h,AX=D724h/CX=00CCh,AX=D724h/CX=00CDh
--------U-16D724CX00CC-----------------------
INT 16 U - APCAL v3.20 - GET ???
        AX = D724h
        CX = 00CCh
Return: AX = 0000h
        BX = 0000h
        DX:CX -> ??? (apparently an internal data area)
SeeAlso: AX=D724h/CX=00CBh,AX=D724h/CX=00CDh
--------U-16D724CX00CD-----------------------
INT 16 U - APCAL v3.20 - GET ???
        AX = D724h
        CX = 00CDh
Return: AX = ??? (5345h seen)
SeeAlso: AX=D724h/CX=00CBh,AX=D724h/CX=00CCh
--------v-16DD--------------------------
INT 16 - VIRUS - "Frumble" - INSTALLATION CHECK
        AH = DDh
Return: AL = DDh if resident
SeeAlso: INT 13/AX=FD50h,INT 21/AX=010Fh,INT 21/AX=0B56h
--------s-16DFDF-----------------------------
INT 16 U - Corel PowerSCSI - FDAUDIO.COM - INSTALLATION CHECK
        AX = DFDFh
Return: ES:DI -> ASCII signature "FDAUDIO/CD" followed by ASCII date, i.e.
          "06/18/93" if installed
--------b-16E000-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - GET VERSION NUMBER
        AX = E000h
Return: CF clear if successful
            AL = FAh
            BX = version number (BCD) (0200h = v2.00)
        CF set on error (not implemented)
Notes:  this interface is available on AMI BIOSes built from AMI core version
          8/8/93 (HiFlex BIOS) or 11/15/93 (WinBIOS) or later
        the "Meningitis" virus uses this API when attacking a system equipped
          with an AMI BIOS; it is supposedly able to write itself into the
          Flash ROM and thus make itself part of the BIOS
SeeAlso: AX=E001h,AX=E004h,AX=E006h,AX=E008h,AX=E00Ah,AX=E00Bh,AX=E0FFh
--------b-16E001-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - GET CHIPSET SAVE/RESTORE SIZE
        AX = E001h
Return: CF clear if successful
            AL = FAh
            BX = number of bytes required to save chipset configuration
        CF set on error
SeeAlso: AX=E000h,AX=E002h,AX=E003h
--------b-16E002-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - SAVE CHIPSET STATUS & PREPARE CHPSET
        AX = E002h
        ES:DI -> buffer for storing chipset status
Return: CF clear if successful
            AL = FAh
        CF set on error
SeeAlso: AX=E000h,AX=E001h,AX=E003h
--------b-16E003-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface -  RESTORE CHIPSET STATUS
        AX = E003h
        ES:DI -> buffer in which chipset status was previously stored
Return: CF clear if successful
            AL = FAh
        CF set on error
SeeAlso: AX=E000h,AX=E001h,AX=E002h
--------b-16E004-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - LOWER PROGRAMMING VOLTAGE Vpp
        AX = E004h
Return: CF clear if successful
            AL = FAh
        CF set on error
Note:   this function does not return until the voltage level stabilizes
SeeAlso: AX=E000h,AX=E005h,AX=E006h
--------b-16E005-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - RAISE PROGRAMMING VOLTAGE Vpp
        AX = E005h
Return: CF clear if successful
            AL = FAh
        CF set on error
Note:   this function does not return until the voltage level stabilizes
SeeAlso: AX=E000h,AX=E004h,AX=E007h
--------b-16E006-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - FLASH WRITE PROTECT
        AX = E006h
Return: CF clear if successful
            AL = FAh
        CF set on error
Note:   this function performs any delay required to allow the Flash ROM to
          stabilize in the write-protected state
SeeAlso: AX=E000h,AX=E004h,AX=E007h
--------b-16E007-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - FLASH WRITE ENABLE
        AX = E007h
Return: CF clear if successful
            AL = FAh
        CF set on error
Note:   this function performs any delay required to allow the Flash ROM to
          stabilize in the write-enabled state
SeeAlso: AX=E000h,AX=E005h,AX=E006h,AX=E008h
--------b-16E008-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - FLASH SELECT
        AX = E008h
Return: CF clear if successful
            AL = FAh
        CF set on error
Desc:   select the Flash ROM if the system contains both EPROM and Flash ROM
Note:   this function performs any delay required to allow the Flash ROM to
          stabilize in the selected state; if no EPROM is present, this
          function always returns successfully
SeeAlso: AX=E000h,AX=E007h,AX=E009h
--------b-16E009-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - FLASH DE-SELECT
        AX = E009h
Return: CF clear if successful
            AL = FAh
        CF set on error
Desc:   select the EPROM if the system contains both EPROM and Flash ROM
Note:   this function performs any delay required to allow the Flash ROM to
          stabilize in the de-selected state; if no EPROM is present, this
          function always returns successfully
SeeAlso: AX=E000h,AX=E006h,AX=E008h
--------b-16E00A-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - VERIFY ALLOCATED MEMORY
        AX = E00Ah
        BX = number of paragraphs
        ES = starting segment of memory
Return: CF clear if successful
            AL = FAh
        CF set on error
Desc:   determine whether the specified memory may be used for flash
          programming
Note:   always returns error if BX is zero on entry
SeeAlso: AX=E000h,AX=E00Bh
--------b-16E00B-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - SAVE INTERNAL CACHE STATUS
        AX = E00Bh
        ES:DI -> buffer for internal cache status (minimum 4Kbytes)
Return: CF clear if successful
            AL = FAh
        CF set on error
Note:   always returns error if the hardware does not contain internal
          cache or this call is made in protected mode
SeeAlso: AX=E000h,AX=E00Ah,AX=E00Ch
--------b-16E00C-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - RESTORE INTERNAL CACHE STATUS
        AX = E00Ch
        ES:DI -> buffer containing internal cache status (minimum 4Kbytes)
Return: CF clear if successful
            AL = FAh
        CF set on error
Note:   always returns error if the hardware does not contain internal
          cache or this call is made in protected mode
SeeAlso: AX=E000h,AX=E00Bh
--------t-16E0E0-----------------------------
INT 16 - TurboPower TSRs - ALTERNATE INSTALLATION CHECK
        AX = E0E0h
Return: AX = 1F1Fh if installed
            DWORD 0040h:00F0h -> last data block in TSR list (see #00615)
Note:   the returned TSR list provides support for communication among TSRs
          built with TurboPower's Turbo Professional and Object Professional
          libraries for Turbo Pascal
SeeAlso: AX=F0F0h
--------b-16E0FF-----------------------------
INT 16 - AMI BIOS - BIOS-FLASH Interface - GENERATE CPU RESET
        AX = E0FFh
Return: never
SeeAlso: AX=E000h,INT 14/AH=17h"FOSSIL"
--------U-16ED--BHED-------------------------
INT 16 - BORLAND TURBO LIGHTNING - API
        AH = EDh
        BH = EDh
        BL = function
            00h installation check
                Return: AX = 5205h
                        CH = major version
                        CL = minor version
            01h identical to function 00h???
            02h get resident data segment
                Return: AX = data segment of resident portion
            03h get resident ???
                Return: AX = offset of some buffer in resident code seg
            04h redefine auxiliary dictionary
                DS:SI -> counted filename string
                Return: AL = result code
            05h select active environment
                AL = environment (00h to 0Ch)
                Return: AX = status
                            0000h if OK
                            0001h if out of range
            06h toggle AutoProof???
                AL = state (00h off, 01h on)
            07h ???
            08h ???
                AL = char???
                CX = ???
                DX = ???
                Return: AX = 0, 1 or 2
            09h ???
            0Ah ???
                CX = ???
                DX = ???
                Return: AX = ???
            0Bh check dictionary integrity???
                DS:SI -> counted dictionary filename string
                Return: AX = 0, 40h, 80h
            0Ch spellcheck string (disk dictionary, possibly RAM dict as well)
                DS:SI -> counted string to check
                Return: AH = 0
                        AL = result code
                           00h string found in dictionary
                           20h string begins more than one word
                           40h string not found
            0Dh set ???
                (sets an internal flag)
            0Eh spellcheck string (RAM dictionary only)
                DS:SI -> counted string to check
                Return: AH = 00h
                        AL = result code
                            00h string found in dictionary
                            01h string not found
                            02h ???
            0Fh ???
            10h ???
Notes:  AX in general returns an error code from most functions.
Index:  installation check;Turbo Lightning
--------U-16EF-------------------------------
INT 16 - CALCULATOR - INSTALLATION CHECK
        AH = EFh
Return: AX = 0088h if installed
Program: CALCULATOR is a shareware popup calculator by Andrzej Brzezinski and
          Marek Kosznik
--------b-16F0-------------------------------
INT 16 - Compaq 386 and newer - SET CPU SPEED
        AH = F0h
        AL = speed code (see #00614)
        if AL=09h,
            CX = speed value, 1 (slowest) to 50 (full), 3 ~= 8088
Note:   also supported by some versions of AMI BIOS dated June 1992 or later;
          speed codes 0 or 1 are used for Low Speed, 2 for High Speed
SeeAlso: AH=F1h,AH=F3h

(Table 00614)
Values for speed code:
 00h    equivalent to 6 MHz 80286 (COMMON)
 01h    equivalent to 8 MHz 80286 (FAST)
 02h    full 16 MHz (HIGH)
 03h    toggles between 8 MHz-equivalent and speed set by system board switch
          (AUTO or HIGH)
 08h    full 16 MHz except 8 MHz-equivalent during floppy disk access
 09h    specify speed directly
--------t-16F0F0-----------------------------
INT 16 - TurboPower TSRs - INSTALLATION CHECK
        AX = F0F0h
Return: AX = 0F0Fh if installed
            ES:DI -> last data block in TSR list (see #00615)
Note:   the returned TSR list provides support for communication among TSRs
          built with TurboPower's Turbo Professional and Object Professional
          libraries for Turbo Pascal
SeeAlso: AX=E0E0h

Format of TurboPower TSR data block:
Offset  Size    Description     (Table 00615)
 00h    DWORD   pointer to program tag (counted ASCII string)
 04h    WORD    interface version number (0400h)
 06h    DWORD   pointer to command entry point
 0Ah    DWORD   pointer to previous data block (0000h:0000h if none)
 0Eh    DWORD   pointer to next data block (0000h:0000h if none)
---swappable TSRs only---
 12h    DWORD   pointer to swapping data
 16h    DWORD   pointer to user data
        more???
--------b-16F1-------------------------------
INT 16 - Compaq 386 and newer - READ CURRENT CPU SPEED
        AH = F1h
Return: AL = speed code (see #00614)
        if AL = 09h, CX = speed code
Note:   also supported by some versions of AMI BIOS dated June 1992 or later
SeeAlso: AH=F0h,AH=F3h
--------b-16F2-------------------------------
INT 16 - Compaq 386 and newer - DETERMINE ATTACHED KEYBOARD TYPE
        AH = F2h
Return: AL = type
            00h if 11-bit AT keyboard is in use
            01h if 9-bit PC keyboard is in use
        AH = 00h (04/08/93 system ROM)
SeeAlso: MEM 0040h:00C2h
--------b-16F3-------------------------------
INT 16 - Compaq 80286s - SET CPU SPEED LIMIT (OVERRIDE JUMPER)
        AH = F3h
        AL = new limit
            00h limit is 6 Mhz
            01h limit is 8 Mhz/6 Mhz
SeeAlso: AH=F0h,AH=F1h
--------U-16F398-----------------------------
INT 16 U - NORTON GUIDES - INSTALLATION CHECK
        AX = F398h
Return: AX = 6A73h ("js")
        BH = BIOS scan code of current hot key
        BL = ASCII code of current hot key
Note:   NG.EXE was written by John Socha
--------b-16F400-----------------------------
INT 16 - Compaq Systempro and higher - CACHE CONTROLLER STATUS
        AX = F400h
Return: AH = E2h (*)
        AL = status
            00h not present
            01h enabled
            02h disabled
        CX = cache memory size
            bit 15:     cache size information is NOT valid
            bits 14-0:  cache memory size in kilobytes
        DH = cache write technology
            bit 7:      cache write information is NOT valid
            bits 6-1:   reserved (0)
            bit 0:      0 = Write-through caching
                        1 = Write-back caching
        DL = cache type
            bit 7:      cache type information is NOT valid
            bits 6-1:   reserved (0)
            bit 0:      0 = Direct mapped
                        1 = Two-way set-associative
Notes:  also supported by some versions of AMI BIOS dated June 1992 or later
        many (most) BIOSes return a modified AH when called for an unsupported
          or non-keyboard function (typically, the highest supported keyboard
          function [normally 12h] is subtracted from the original AH)
SeeAlso: AX=F401h,AX=F402h
--------b-16F401-----------------------------
INT 16 - Compaq Systempro and higher - ENABLE CACHE CONTROLLER
        AX = F401h
Return: AX = E201h
Notes:  also supported by some versions of AMI BIOS dated June 1992 or later
        many (most) BIOSes return a modified AH when called for an unsupported
          or non-keyboard function (typically, the highest supported keyboard
          function [normally 12h] is subtracted from the original AH)
SeeAlso: AX=F400h,AX=F402h
--------b-16F402-----------------------------
INT 16 - Compaq Systempro and higher - DISABLE CACHE CONTROLLER
        AX = F402h
Return: AX = E202h
Notes:  also supported by some versions of AMI BIOS dated June 1992 or later
        many (most) BIOSes return a modified AH when called for an unsupported
          or non-keyboard function (typically, the highest supported keyboard
          function [normally 12h] is subtracted from the original AH)
SeeAlso: AX=F400h,AX=F401h
--------v-16FA00DX5945-----------------------
INT 16 U - PC Tools v8+ VSAFE, VWATCH - INSTALLATION CHECK
        AX = FA00h
        DX = 5945h
Return: CF clear
        DI = 4559h
        BX = BIOS hotkey scancode (default 2F00h) (VSAFE only)
                FFFFh if disabled
Note:   MS-DOS 6.0 bundles VSAFE and VWATCH as part of its virus protection
SeeAlso: AX=FA05h,INT 13/AH=FAh,INT 21/AH=FAh"VDEFEND",INT 2F/AX=6282h
--------v-16FA01DX5945-----------------------
INT 16 U - PC Tools v8+ VSAFE, VWATCH - UNINSTALL
        AX = FA01h
        DX = 5945h
Return: CF clear if successful
        DI = 4559h
SeeAlso: AX=FA00h
--------v-16FA02DX5945-----------------------
INT 16 U - PC Tools v8+ VSAFE, VWATCH - GET/SET OPTIONS
        AX = FA02h
        DX = 5945h
        BL = new parameter flags (see #00616)
Return: CF clear
        DI = 4559h
        CL = old value of parameter flags

Bitfields for VSAFE/VWATCH parameter flags:
Bit(s)  Description     (Table 00616)
 7      Protect executable files
 6      Protect FD boot sector
 5      Protect HD boot sector
 4      Boot sector viruses
 3      Check executable files
 2      General write protect
 1      Resident
 0      HD Low level format
--------v-16FA03DX5945-----------------------
INT 16 U - PC Tools v8+ VSAFE, VWATCH - GET ???
        AX = FA03h
        DX = 5945h
Return: CF clear
        DI = 4559h
        AX = 0002h
--------v-16FA04DX5945-----------------------
INT 16 U - PC Tools v8+ VSAFE - GET HOTKEY DISABLE FLAG
        AX = FA04h
        DX = 5945h
Return: CF clear
        DI = 4559h
        BL = hotkey disable flag (nonzero if hotkey disabled)
Note:   this function is a NOP under VWATCH, merely returning CF clear/DI=4559h
SeeAlso: AX=FA00h,AX=FA05h
--------v-16FA05DX5945-----------------------
INT 16 U - PC Tools v8+ VSAFE - SET HOTKEY DISABLE FLAG
        AX = FA05h
        DX = 5945h
        BL = new value of hotkey disable flag (nonzero to disable hotkey)
Return: CF clear
        DI = 4559h
Note:   this function is a NOP under VWATCH, merely returning CF clear/DI=4559h
SeeAlso: AX=FA00h,AX=FA04h
--------v-16FA06DX5945-----------------------
INT 16 U - PC Tools v8+ VSAFE, VWATCH - GET NETWORK DRIVES TEST FLAG
        AX = FA06h
        DX = 5945h
Return: CF clear
        DI = 4559h
        BL = test status
            00h don't monitor network drives (default for VWATCH v2.1)
            FFh monitor network drives (default for VSAFE v2.0)
        CL = ??? (only VSAFE 2.0)
SeeAlso: AX=FA07h
--------v-16FA07DX5945-----------------------
INT 16 U - PC Tools v8+ VSAFE, VWATCH - SET NETWORK DRIVES TEST FLAG
        AX = FA07h
        DX = 5945h
        BL = new state
            00h don't monitor
            01h monitor network drives
Return: CF clear
        DI = 4559h
Note:   VWATCH v2.1 (from PC Tools 9.0) returns CF set instead
SeeAlso: AX=FA00h,AX=FA06h
--------v-16FA08DX5945-----------------------
INT 16 U - PC Tools v9+ VWATCH v2.1 - ???
        AX = FA08h
        DX = 5945h
Return: CF clear
        DI = 4559h
        AX = ??? (0002h)
        BX = version (BH=major, BL=two-digit minor)
Note:   this function is not supported by the PC Tools 9.0 VSAFE v2.0
SeeAlso: AX=FA00h,AX=FA06h
--------U-16FE55-----------------------------
INT 16 U - PC Tools v8+ programs - GET ???
        AX = FE55h
        CX = segment of resident program or 0000h for last loaded
        DX = 0000h
Return: DX = resident code segment (unchanged if CX=0000h on entry)
        AX = ??? or 0000h
Note:   this call is supported by CPSCHED, CPTASK, DATAMON, DPROTECT, DRIVEMAP,
          and DSKLIGHT beginning in PC Tools v8.0; programs other than CPTASK
          seem to hook it merely to return the same AX as the CPTASK loaded
          prior to them returned
--------U-16FEA4-----------------------------
INT 16 U - PC Tools v7+ CPSCHED/DESKTOP - RESET ???
        AX = FEA4h
Return: nothing
Note:   this function is identical to AX=FFA4h, and is implemented by the same
          code in DESKTOP
SeeAlso: AX=FFA4h
--------U-16FEC6-----------------------------
INT 16 U - PC Tools v7+ CPSCHED - ENABLE/DISABLE CPSCHED API
        AX = FEC6h
        BL = new state (00h enabled, nonzero disabled)
Return: nothing
Desc:   specify whether CPSCHED API calls other than this one and AX=FE55h will
          be honored
--------U-16FED3-----------------------------
INT 16 U - PC Tools v7+ CPSCHED/DESKTOP - ???
        AX = FED3h
        DS:SI -> 92-byte data record for ???
Return: ???
Note:   this function is identical to AX=FFD3h, and is implemented by the same
          code in DESKTOP
SeeAlso: AX=FFD3h
--------U-16FEDC-----------------------------
INT 16 U - PC Tools v7+ CPSCHED - UNHOOK INTERRUPTS
        AX = FEDCh
Return: AX,DX destroyed
Index:  uninstall;CPSCHED
--------U-16FEEFCX0000-----------------------
INT 16 U - PC Tools v7+ CPSCHED/DESKTOP - INSTALLATION CHECK
        AX = FEEFh
        CX = 0000h
Return: CX = ABCDh if PC Tools scheduler (CPSCHED or DESKTOP) installed
            BX = segment of resident portion
            DX = (CPSCHED v8.0) resident CS
Note:   this function is identical to AX=FFD3h, and is implemented by the same
          code in DESKTOP
SeeAlso: AX=FFEFh
--------U-16FEF1-----------------------------
INT 16 U - PC Tools v7 only CPSCHED/DESKTOP - ALTERNATE INSTALLATION CHECK
        AX = FEF1h
        BX = ???
Return: CX = 5555h if PC Tools scheduler (CPSCHED or DESKTOP) installed
        DX = 5555h
Note:   this function is identical to AX=FFD3h, and is implemented by the same
          code in DESKTOP
SeeAlso: AX=FFF1h
--------K-16FF-------------------------------
INT 16 - KEYBOARD - KBUF extensions - ADD KEY TO TAIL OF KEYBOARD BUFFER
        AH = FFh
        DX = scan code
Return: AL = status
            00h success
            01h failure
Program: KBUF is a keyboard buffer expander by Mark Adler
SeeAlso: AH=05h
--------V-16FF-------------------------------
INT 16 - OPTIMA 1024 VGA-Sync,ET-3000 chipset - QUERY ZOOM INTERRUPT
        AH = FFh
Return: AL = interrupt number to which BIOS keyboard handler has been relocated
        AL+1 = Zoom interrupt number
        BX = hotkey
Notes:  the default interrupts are 60h for keyboard and 61h for Zoom interrupt;
          the default hot key is F10
        not all vendors include the Tseng TSR which supports these functions
SeeAlso: INT 61/AX=0000h"OPTIMA",INT 61/AX=0005h"OPTIMA"
Index:  hotkeys;OPTIMA 1024 VGA
----------16FF--BH00-------------------------
INT 16 - FREEZE.COM - INSTALLATION CHECK
        AH = FFh
        BH = 00h
Return: BH = FFh if installed
Program: FREEZE is a PC Magazine utility
--------d-16FF70BX0000-----------------------
INT 16 U - PC Tools v8+ DRIVEMAP - INSTALLATION CHECK
        AX = FF70h
        BX = 0000h
        CX = 4C69h ('Li')
        DX = 6E6Bh ('nk')
Return: AX = 0000h
        CX = 4350h ('CP')
        DH = major version
        DL = minor version
Program: DRIVEMAP is a redirector which allows drives on computers connected
          over the parallel or serial ports to appear as local drives
SeeAlso: AX=FF70h/BX=0001h,AX=FF70h/BX=0002h
--------d-16FF70BX0001-----------------------
INT 16 U - PC Tools v8+ DRIVEMAP - ???
        AX = FF70h
        BX = 0001h
        DL = ???
Return: AX = ???
        DH = ???
SeeAlso: AX=FF70h/BX=0000h,AX=FF70h/BX=0002h
--------d-16FF70BX0002-----------------------
INT 16 U - PC Tools v8+ DRIVEMAP - ???
        AX = FF70h
        BX = 0002h
        CX = ???
        DX = ???
Return: AX = ??? or FFFEh/FFFFh on error
        DL = ???
BUG:    DRIVEMAP will branch to random locations for BX values other than
          those listed above for v8.0-9.0 because a) the incorrect register is
          range-tested, resulting in BX=0003h-5CD6h being accepted as valid
          function numbers, and b) the conditional which branches on invalid
          function numbers jumps to the following instruction, becoming a NOP
SeeAlso: INT 2F/AX=9203h"DRIVEMAP"
Index:  installation check;DRIVEMAP
--------T-16FF80BX0000-----------------------
INT 16 U - PC Tools v8+ CPTASK - INSTALLATION CHECK
        AX = FF80h
        BX = 0000h
        CX = 0000h
        DX = 0000h
Return: CX = 5555h if installed
Program: CPTASK is a task switcher by Central Point Software
--------T-16FF80BX0001-----------------------
INT 16 U - PC Tools v8+ CPTASK - GET ???
        AX = FF80h
        BX = 0001h
        ???
Return: DX:SI -> task list??? (ten entries of 70h bytes in v9.0)
        BX = ??? (PSP segment of resident code???)
--------T-16FF80BX0002-----------------------
INT 16 U - PC Tools v8+ CPTASK - GET ???
        AX = FF80h
        BX = 0002h
Return: DX:SI -> ???
--------T-16FF80BX0003-----------------------
INT 16 U - PC Tools v8+ CPTASK - GET ??? FLAGS
        AX = FF80h
        BX = 0003h
Return: AX = flags (see #00617)
SeeAlso: AX=FF80h/BX=0004h,AX=FF80h/BX=0006h

Bitfields for CPTASK flags:
Bit(s)  Description     (Table 00617)
 10     ???
 13     ???
 14     ???
 15     ???
--------T-16FF80BX0004-----------------------
INT 16 U - PC Tools v8+ CPTASK - SET ???
        AX = FF80h
        BX = 0004h
        CX = new value of ???
Return: ???
Note:   this function also sets bit 14 of the flags word returned by
          AX=FF80h/BX=0003h
--------T-16FF80BX0005-----------------------
INT 16 U - PC Tools v8+ CPTASK - GET NUMBER OF ACTIVE TASKS???
        AX = FF80h
        BX = 0005h
Return: AX = number of active tasks???
--------T-16FF80BX0006-----------------------
INT 16 U - PC Tools v8+ CPTASK - GET AND CLEAR ??? FLAG
        AX = FF80h
        BX = 0006h
Return: AX = old state (0000h clear, 0001h set)
Note:   the tested flag is bit 13 of the flags returned by AX=FF80h/BX=0003h
--------T-16FF80BX0007-----------------------
INT 16 U - PC Tools v8+ CPTASK - ???
        AX = FF80h
        BX = 0007h
        ES:DI -> ???
        ???
Return: ???
--------T-16FF80BX0008-----------------------
INT 16 U - PC Tools v8+ CPTASK - ???
        AX = FF80h
        BX = 0008h
        ???
Return: ???
--------T-16FF80BX0009-----------------------
INT 16 U - PC Tools v8+ CPTASK - GET ???
        AX = FF80h
        BX = 0009h
Return: CL = ???
        CH = ??? (01h or 02h)
--------T-16FF80BX000A-----------------------
INT 16 U - PC Tools v9+ CPTASK - SET ???
        AX = FF80h
        BX = 000Ah
        DS:SI -> 128-byte buffer containing ???
--------T-16FF80BX000B-----------------------
INT 16 U - PC Tools v9+ CPTASK - SET ???
        AX = FF80h
        BX = 000Bh
        DX = index of ??? task (1-10)
--------T-16FF80BX000C-----------------------
INT 16 U - PC Tools v9+ CPTASK - SET IDLE??? DELAY
        AX = FF80h
        BX = 000Ch
        CX = new delay time in minutes
--------T-16FF80BX4350-----------------------
INT 16 U - PC Tools v8+ CPTASK - UNINSTALL
        AX = FF80h
        BX = 4350h ('CP')
        CX = 5354h ('ST')
Return: never returns; terminates all tasks and exits to program originally
          calling CPTASK
--------U-16FF90-----------------------------
INT 16 U - PC Tools v8+ DESKTOP - ???
        AX = FF90h
        ???
Return: ???
Note:   available only when popped up
--------U-16FF91-----------------------------
INT 16 U - PC Tools v7+ DESKTOP - ???
        AX = FF91h
        ???
Return: AX = 0000h
Note:   calls AX=FFFDh after ???
SeeAlso: AX=FF92h,AX=FFFDh
--------U-16FF92-----------------------------
INT 16 U - PC Tools v7+ DESKTOP - ???
        AX = FF92h
        ???
Return: AX = 0000h
Note:   like AX=FF91h, but temporarily sets ??? to 3
SeeAlso: AX=FF91h,AX=FFFDh
--------U-16FF93-----------------------------
INT 16 U - PC Tools v7+ DESKTOP - SET ??? FLAG
        AX = FF93h
--------U-16FF94-----------------------------
INT 16 U - PC Tools v7+ DESKTOP - SET ???
        AX = FF94h
        CX = ??? (default 0017h)
--------U-16FF95-----------------------------
INT 16 U - PC Tools v7+ DESKTOP - SET ???
        AX = FF95h
        BX = ???
--------U-16FF96-----------------------------
INT 16 U - PC Tools v7+ DESKTOP - ???
        AX = FF96h
        CL = ???
Return: AX = ???
--------U-16FF97-----------------------------
INT 16 U - PC Tools v7+ DESKTOP - ???
        AX = FF97h
        DS:DX -> buffer for ??? (see #00618)
Return: ???

Format of PC Tools DESKTOP buffer:
Offset  Size    Description     (Table 00618)
 00h 48 BYTEs   ???
 30h 128 BYTEs  ???
--------U-16FF98-----------------------------
INT 16 U - PC Tools v7+ DESKTOP - OPEN \DESK.OVL FILE AND SEEK TO OVERLAY
        AX = FF98h
        DX = byte offset in file of overlay header (see #00619)
Return: BX = file handle for DESK.OVL file
Desc:   open the DESK.OVL file, seek to the specified offset, read in the
          overlay header, and seek to the offset specified by the header

Format of PC Tools DESKTOP overlay header:
Offset  Size    Description     (Table 00619)
 00h 12 BYTEs   NUL-padded ASCII overlay filename
 0Ch    DWORD   offset within DESK.OVL file of actual overlay
--------U-16FF99-----------------------------
INT 16 U - PC Tools v7+ DESKTOP - ???
        AX = FF99h
        ???
Return: ???
--------U-16FF9A-----------------------------
INT 16 U - PC Tools v7+ DESKTOP - GET NAME OF COLOR SCHEME
        AX = FF9Ah
Return: ES:BX -> name of current color scheme
Note:   available even if not popped up
--------U-16FF9B-----------------------------
INT 16 U - PC Tools v7+ DESKTOP - UNUSED
        AX = FF9Bh
Return: ???
Note:   sounds triple-length beep
--------T-16FF9C-----------------------------
INT 16 U - PC Tools v8+ CPTASK - SET/CLEAR ??? POINTER
        AX = FF9Ch
        BL = function
            00h set ??? pointer
                DS:SI -> ???
            01h clear pointer to 0000h:0000h
----------16FF9D-----------------------------
INT 16 U - PC Tools v8+ CPTASK, VSAFE - ???
        AX = FF9Dh
        ES:BX -> ??? word
Return: ???
Note:   if ES is non-zero, the word pointed at by ES:BX determines whether the
          ??? flag is cleared (word = 0000h) or set (word is nonzero).  The
          flag is always cleared if ES=0000h.
--------U-16FF9E-----------------------------
INT 16 U - PC Tools v7+ DESKTOP - ???
        AX = FF9Eh
        DL = ???
            bit 7: ???
            bits 6-0: function number??? (00h,01h,other)
        ???
Return: ???
--------U-16FFA1-----------------------------
INT 16 U - PC Tools v7+ DESKTOP - ???
        AX = FFA1h
        ???
Return: ???
Note:   same as AX=FFA2h, except ??? set to FFh
SeeAlso: AX=FFA2h
--------U-16FFA2-----------------------------
INT 16 U - PC Tools v7+ DESKTOP - ???
        AX = FFA2h
        ???
Return: ???
Note:   calls AX=FFC7h (remove window) and AX=FFFDh
SeeAlso: AX=FFA1h,AX=FFC7h,AX=FFFDh
--------y-16FFA3BX0000-----------------------
INT 16 U - PC Tools v7-8 DATAMON, v9+ DPROTECT - INSTALLATION CHECK
        AX = FFA3h
        BX = 0000h
        CX = 0000h
Return: AX = segment of resident code
        BX = 5555h
        CX = 5555h
Note:   also supported by DOS 6 UNDELETE which is licensed from PC Tools
SeeAlso: INT 21/AH=3Fh"NB.SYS",INT 21/AX=4101h,INT 2F/AX=6284h
--------y-16FFA3BX0001-----------------------
INT 16 U - PC Tools v7-8 DATAMON, v9+ DPROTECT - GET ???
        AX = FFA3h
        BX = 0001h
        CX = 0001h
Return: AX:BX -> ???
        CX = BX
--------y-16FFA3BX0002-----------------------
INT 16 U - PC Tools v7-8 DATAMON, v9+ DPROTECT - GET ???
        AX = FFA3h
        BX = 0002h
        CX = 0002h
Return: AX = ??? (0 or 1)
        CX = BX = AX
--------y-16FFA3BX0003-----------------------
INT 16 U - PC Tools v7-8 DATAMON, v9+ DPROTECT - GET ???
        AX = FFA3h
        BX = 0003h
        CX = 0003h
Return: AX = ??? (0 or 1)
        CX = BX = AX
--------y-16FFA3BX0004-----------------------
INT 16 U - PC Tools v7+ DATAMON - SET ??? FLAG
        AX = FFA3h
        BX = 0004h
        CX = 0004h
SeeAlso: AX=FFA3h/BX=0005h
--------y-16FFA3BX0005-----------------------
INT 16 U - PC Tools v7+ DATAMON - CLEAR ??? FLAG
        AX = FFA3h
        BX = 0005h
        CX = 0005h
SeeAlso: AX=FFA3h/BX=0004h
--------y-16FFA3BX0006-----------------------
INT 16 U - PC Tools v7+ DATAMON - SET PSP SEGMENT ???
        AX = FFA3h
        BX = 0006h
        CX = 0006h
        DX = current PSP segment as known to DOS??? or 0000h
--------d-16FFA3BXFFA3-----------------------
INT 16 U - PC Tools v9 DSKLIGHT - INSTALLATION CHECK
        AX = FFA3h
        BX = FFA3h
        CX = FFA3h
Return: BX = CX = 5555h if installed
            AX = resident code segment
Program: DSKLIGHT is a TSR included with PC Tools v9+ which displays a disk-
          access indicator on the screen; in v7 and v8, this function was
          provided by DATAMON
Note:   DSKLIGHT chains to the previous handler if BX or CX is not FFA3h
--------U-16FFA4-----------------------------
INT 16 U - PC Tools v7-8 DESKTOP - ???
        AX = FFA4h
Return: ???
Notes:  available even when not popped up
        sets unknown flag if ??? conditions met
SeeAlso: AX=FEA4h
--------c-16FFA5CX1111-----------------------
INT 16 - PC-Cache v6+ - INSTALLATION CHECK
        AX = FFA5h
        CX = 1111h
Return: CH = 00h if installed
            ES:DI -> internal data (see #00620)
            CL = cache state
                01h enabled
                02h disabled
SeeAlso: INT 13/AH=27h,INT 13/AH=A0h,INT 21/AH=2Bh/CX=4358h

Format of PC-Cache internal data:
Offset  Size    Description     (Table 00620)
-1Ch 20 BYTEs   cached drive list, one byte per drive A: to T:
                each byte is either blank (20h) or drive letter (41h-54h)
 -8     BYTE    ???
 -7     WORD    number of physical transfers (scaled down to 0000h-7FFFh)
 -5     WORD    number of saved transfers (scaled down to 0000h-7FFFh)
 -3   3 BYTEs   ???
--------c-16FFA5CXAAAA-----------------------
INT 16 - PC-Cache v6+ - ENABLE DELAYED WRITES
        AX = FFA5h
        CX = AAAAh
Return: AX = ??? (apparently either 0000h or sectors_in_cache - 5)
SeeAlso: AX=FFA5h/CX=CCCCh
--------c-16FFA5CXCCCC-----------------------
INT 16 - PC-Cache v6+ - FLUSH CACHE AND DISABLE DELAYED WRITES
        AX = FFA5h
        CX = CCCCh
Return: AX = ??? (apparently either 0000h or sectors_in_cache - 5)
Note:   delayed writes are automatically disabled on EXECing
          (see INT 21/AH=4Bh) a program named either WIN.CO? or DV.E??;
          however, delayed writes are not automatically reenabled upon the
          program's termination in v6.
SeeAlso: AX=FFA5h/CX=AAAAh,AX=FFA5h/CX=FFFFh
--------c-16FFA5CXDDDD-----------------------
INT 16 - PC-Cache v6+ - FLUSH AND DISABLE CACHE
        AX = FFA5h
        CX = DDDDh
SeeAlso: AX=FFA5h/CX=EEEEh,AX=FFA5h/CX=FFFFh
--------c-16FFA5CXEEEE-----------------------
INT 16 - PC-Cache v6+ - ENABLE CACHE
        AX = FFA5h
        CX = EEEEh
SeeAlso: AX=FFA5h/CX=DDDDh
--------c-16FFA5CXFFFF-----------------------
INT 16 - PC-Cache v6+ - FLUSH CACHE
        AX = FFA5h
        CX = FFFFh
SeeAlso: AX=FFA5h/CX=CCCCh,AX=FFA5h/CX=DDDDh,INT 13/AH=A1h
--------U-16FFA6-----------------------------
INT 16 U - PC Tools v6.0-8.0 DESKTOP - GET ???
        AX = FFA6h
Return: DS:SI -> ???
Note:   available only when popped up
--------U-16FFA7-----------------------------
INT 16 U - PC Tools v6.0-8.0 DESKTOP - GET ??? PATH
        AX = FFA7h
Return: DS:SI -> ASCIZ path (directory from which PCTools was run???)
--------U-16FFA8-----------------------------
INT 16 U - PC Tools v6.0-8.0 DESKTOP - ???
        AX = FFA8h
        DS:SI -> three consecutive ASCIZ strings for ??? (max 256 bytes total)
        ???
Return: ???
Notes:  available only when popped up
        strings copied into internal buffer, among other actions
--------U-16FFA9-----------------------------
INT 16 U - PC Tools v6.0-8.0 DESKTOP - GET VERSION STRING
        AX = FFA9h
Return: DS:SI -> version string
--------U-16FFAA-----------------------------
INT 16 U - PC Tools v6.0-8.0 DESKTOP - ???
        AX = FFAAh
        ???
Return: ???
Note:   available only when popped up
--------U-16FFAB-----------------------------
INT 16 U - PC Tools v6.0-8.0 DESKTOP - GET EDITOR SETTINGS???
        AX = FFABh
Return: DS:SI -> editor setting strings???
--------U-16FFAC-----------------------------
INT 16 U - PC Tools v6.0-8.0 DESKTOP - SET ???
        AX = FFACh
        DL = ???
Note:   available only when popped up
--------U-16FFAD-----------------------------
INT 16 U - PC Tools v6.0-8.0 DESKTOP - SET ???
        AX = FFADh
        DL = ???
--------U-16FFAE-----------------------------
INT 16 U - PC Tools v6.0-8.0 DESKTOP - GET ???
        AX = FFAEh
Return: AL = ???
--------U-16FFAF-----------------------------
INT 16 U - PC Tools v6.0-8.0 DESKTOP - SET ???
        AX = FFAFh
        DL = ???
--------U-16FFB0-----------------------------
INT 16 U - PC Tools v6.0-8.0 DESKTOP - SET ???
        AX = FFB0h
        BL = ???
--------U-16FFB1-----------------------------
INT 16 U - PC Tools v6.0-8.0 DESKTOP - ???
        AX = FFB1h
        ???
Return: ???
--------U-16FFB2-----------------------------
INT 16 U - PC Tools v5.5-8.0 DESKTOP - GET ???
        AX = FFB2h
Return: DS:SI -> ???
--------U-16FFB3-----------------------------
INT 16 U - PC Tools v5.5-8.0 DESKTOP - ???
        AX = FFB3h
        ???
Return: ???
Note:   available only when popped up
--------U-16FFB4-----------------------------
INT 16 U - PC Tools v5.5-8.0 DESKTOP - SET ??? FLAG
        AX = FFB4h
Note:   available only when popped up
SeeAlso: AX=FFBBh
--------U-16FFB5-----------------------------
INT 16 U - PC Tools v5.5-8.0 DESKTOP - GET/SET WINDOW PARAMETERS
        AX = FFB5h
        BX = window specifier (000Fh to 0019h) (see #00621)
        DX = 0000h get, nonzero = set
        ES:DI -> window parameter buffer (see #00622)
SeeAlso: AX=FFCBh

(Table 00621)
Values for PC Tools DESKTOP window specifier:
 000Fh  comm/FAX
 0014h  hotkey selection
 0015h  ASCII table
 0016h  system colors menu

Format of PC Tools DESKTOP window parameters:
Offset  Size    Description     (Table 00622)
 00h    BYTE    rows in window, not counting frame
 01h    BYTE    columns in window, not counting frame
 02h    BYTE    row number of top of window
 03h    BYTE    2*column number of left of window
 04h    BYTE    character attribute for ???
 05h    BYTE    character attribute for background/border
 06h    BYTE    character attribute for ???
 07h    DWORD   pointer to ??? on screen
 0Bh  4 BYTEs   ???
 0Fh    BYTE    nonzero if window may be resized
Note:   if running in monochrome mode, character attributes at offsets 04h to
          06h are stored unchanged, but attributes other than 07h, 0Fh, or 70h
          are changed to 07h on reading
--------U-16FFB6-----------------------------
INT 16 U - PC Tools v5.5-8.0 DESKTOP - GET ???
        AX = FFB6h
Return: AH = ???
        AL = ???
--------U-16FFB7-----------------------------
INT 16 U - PC Tools v5.5-8.0 DESKTOP - GET/SET ???
        AX = FFB7h
        BX = direction
            0000h copy to buffer
            else  copy from buffer
        DS:SI -> 70-byte buffer with ???
Return: data copied
Note:   available only when popped up under v6.0+
--------U-16FFB8-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - GET/SET???
        AX = FFB8h
        BH = subfunction
            00h get
                Return: BL = old value of ???
                        CL = old value of ??? (v6.0+)
                        CH = old value of ??? (v6.0+)
            nonzero set
                BL = new value for ???
                CL = new value for ??? (v6.0+)
                CH = new value for ??? (v6.0+)
                DH = ???
                Return: AL = old value replaced by CL (v6.0+)
                        AH = old value replaced by CH (v6.0+)
--------U-16FFB9-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFB9h
        ???
Return: AX = ???
        CX = ???
        DS:SI -> ???
        ES:DI -> ???
--------U-16FFBA-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFBAh
        ???
Return: AX = ???
Note:   available only when popped up
--------U-16FFBB-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - CLEAR ??? FLAG
        AX = FFBBh
Note:   available only when popped up
SeeAlso: AX=FFB4h
--------U-16FFBC-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - RESTORE ORIGINAL SCREEN???
        AX = FFBCh
--------U-16FFBD-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ??? DATABASE INDEXING MESSAGES
        AX = FFBDh
        ???
Return: ???
--------U-16FFBE-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFBEh
        ???
Return: ???
Note:   available only when popped up
--------U-16FFBF-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFBFh
        BX = DOS file handle to write on
        ???
Return: ???
Note:   available only when popped up
--------U-16FFC0-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFC0h
        ???
Return: AX = 0000h if successful
        AX = FFFFh on error
Note:   available only when popped up
--------U-16FFC1-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFC1h
        BL = ???
        ES:DI -> data structure (see #00623)
        ???
Return: AX = ???
Note:   available only when popped up
SeeAlso: AX=FFC2h,AX=FFC3h

Format of PC Tools DESKTOP data structure:
Offset  Size    Description     (Table 00623)
 00h    WORD    ???
 02h    WORD    ???
 04h    WORD    ???
 06h    WORD    ???
 08h    WORD    ???
 0Ah    BYTE    ???
 0Bh    BYTE    ??? (zero/nonzero)
---v7.1---
 0Ch    WORD    ???
 0Eh    BYTE    ???
 0Fh    WORD    ???
 11h    WORD    ???
        ???
--------U-16FFC2-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFC2h
        BL = ???
        ES:DI -> data structure (see #00623)
        ???
Return: AH = ???
        CX = ???
        DH = ???
        DL = ???
Note:   available only when popped up
SeeAlso: AX=FFC1h,AX=FFC3h
--------U-16FFC3-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFC3h
        BL = ???
        ES:DI -> data structure (see #00623)
        ???
Return: AH = ???
        CX = ???
        DH = ???
        DL = ???
Note:   available only when popped up
SeeAlso: AX=FFC1h,AX=FFC2h
--------U-16FFC4-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - GET ???
        AX = FFC4h
Return: AL = ???
        BX = segment of scratch space???
        CX = segment of stored screen data (section covered by window???)
        DX = segment of window parameters for ???
        ES:BP -> ???
Note:   available only when popped up in versions prior to 6.0
--------U-16FFC5-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - CHECK WHETHER DESKTOP LOADED RESIDENT
        AX = FFC5h
Return: BL = Desktop state
            00h if nonresident
            nonzero if loaded resident
Note:   available only when popped up; should call AX=FFEFh first to ensure
          that DESKTOP is active
SeeAlso: AX=FFEFh,AX=FFF3h
--------U-16FFC6-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - SET ???
        AX = FFC6h
        BL = new value for ???
--------U-16FFC7-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - REMOVE WINDOW
        AX = FFC7h
        ???
Return: ???
--------U-16FFC8-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - GET ???
        AX = FFC8h
Return: DS:SI -> ???
Note:   valid only while popped up
--------U-16FFC9-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - COPY DATA TO CLIPBOARD
        AX = FFC9h
        DS:SI -> characters to store in clipboard
        CX = size in bytes
Return: CF set on error
Notes:  available only when popped up
        while copying, bytes of 00h and 0Ah are skipped
--------U-16FFCA-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - SET ???
        AX = FFCAh
        DX = ???
Return: AX destroyed
Note:   available only when popped up
--------U-16FFCB-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - SELECT WINDOW PARAMETERS???
        AX = FFCBh
        DX = window specifier???
Return: AX destroyed
Note:   available only when popped up
SeeAlso: AX=FFB5h
--------U-16FFCC-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - DISPLAY ASCIZ STRING CENTERED IN WINDOW
        AX = FFCCh
        DS:SI -> ASCIZ string
Return: AX = ???
        CX = ???
        ES:DI -> address past last character displayed (v5.1/5.5)
              -> ??? on menu bar (v6.0)
--------U-16FFCD-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFCDh
        DS:DX -> ???
Return: ???
Note:   available only when popped up
--------U-16FFCE-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - SET ??? DELAYS
        AX = FFCEh
        CX = ???
Return: nothing???
--------U-16FFCF-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - CLOSE PRINTER/PRINT FILE
        AX = FFCFh
Note:   available only when popped up
--------U-16FFD0-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - PREPARE TO PRINT???
        AX = FFD0h
        ???
Return: ???
Note:   available only when popped up
--------U-16FFD1-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - DISPLAY PRINT OPTIONS MENU
        AX = FFD1h
Return: BX = number of copies
        DX = destination
            00h cancel
            01h LPT1
            02h LPT2
            03h LPT3
            04h COM1
            05h COM2
            06h disk file
Note:   available only when popped up
--------U-16FFD2-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFD2h
        BX = ???
Return: BL = ???
Note:   available only when popped up
--------U-16FFD3-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFD3h
        DS:SI -> 92-byte data record for ???
Return: ???
SeeAlso: AX=FED3h
--------U-16FFD4BH3C-------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - CREATE/OPEN/DELETE FILE
        AX = FFD4h
        BH = 3Ch create file (with no attributes)
             3Dh open file
             41h delete file
        BL = access mode
             00h read only
             01h write only
             02h read/write
        DS:SI -> ASCIZ filename
Return: BX = file handle
            0000h on error
Note:   operation is attempted in (in order) the directory from which the
          desktop was started/run???, the directory specified with the
          filename, X:\PCTOOLS\, and X:\
--------U-16FFD5-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFD5h
        ???
Return: ???
Note:   available only when popped up
--------U-16FFD6-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFD6h
        BX = ???
        CX = ???
        DX = offset in ???
        ???
Return: ???
Note:   available only when popped up
--------U-16FFD7-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFD7h
        ???
Return: BL = ???
Note:   available only when popped up
--------U-16FFD8-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - SAFE CREATE FILE
        AX = FFD8h
        DS:BX -> ASCIZ filename
Return: BX = file handle
            0000h on error
Note:   pops up confirmation menu if file already exists
        only available when popped up???
--------U-16FFD9-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - GET ???
        AX = FFD9h
Return: AX = ???
Note:   available only when popped up
--------U-16FFDA-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - GET NAME OF LAST FILE OPENED
        AX = FFDAh
        DS:SI -> ??? (v5.1/5.5 only)
Return: DS:SI -> filename
--------U-16FFDB-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - SET ???
        AX = FFDBh
        BL = ???
Note:   available only when popped up
--------U-16FFDC-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - UNHOOK
        AX = FFDCh
Return: interrupt vectors 09h, 10h (v6.0+), 16h, 1Ch, and 21h restored to
          original values
Index:  uninstall;PC Tools DESKTOP
--------U-16FFDDBX0000-----------------------
INT 16 U - PC Tools v5.1+ PCShell API - INSTALLATION CHECK
        AX = FFDDh
        BX = 0000h
Return: CX = 5555h
        DX = 5555h if PCShell installed in resident mode
--------U-16FFDDBX0001-----------------------
INT 16 U - PC Tools v5.1+ PCShell API - REQUEST POP-UP
        AX = FFDDh
        BX = 0001h
Return: CF clear if request successful (PCShell will pop up)
        CF set on error
SeeAlso: AX=FFDDh/BX=0003h
--------U-16FFDDBX0002-----------------------
INT 16 U - PC Tools v5.1-5.5 PCShell API - GET ???
        AX = FFDDh
        BX = 0002h
Return: AL =
            00h ???
            01h ???
Note:   PCShell v6.0+ displays the error message "Incorrect PCRUN version",
          awaits a keystroke, and aborts the current process
--------U-16FFDDBX0003-----------------------
INT 16 U - PC Tools v5.1+ PCShell API - REQUEST POP-UP
        AX = FFDDh
        BX = 0003h
SeeAlso: AX=FFDDh/BX=0001h
--------U-16FFDDBX0004-----------------------
INT 16 U - PC Tools v5.1+ PCShell API - GET ???
        AX = FFDDh
        BX = 0004h
Return: CF clear if successful
            DS:SI -> ???
--------U-16FFDDBX0005-----------------------
INT 16 U - PC Tools v5.1+ PCShell API - ???
        AX = FFDDh
        BX = 0005h
        ???
Return: ???
Note:   resets various variables if certain conditions are met
--------U-16FFDDBX0006-----------------------
INT 16 U - PC Tools v5.1+ PCShell API - ???
        AX = FFDDh
        BX = 0006h
        ???
Return: ???
Note:   resets various variables if certain conditions are met
--------U-16FFDDBX0007-----------------------
INT 16 U - PC Tools v5.1+ PCShell API - SET ??? FLAG
        AX = FFDDh
        BX = 0007h
Return: CF clear if successful
SeeAlso: AX=FFDDh/BX=0008h
--------U-16FFDDBX0008-----------------------
INT 16 U - PC Tools v5.1+ PCShell API - CLEAR ??? FLAG
        AX = FFDDh
        BX = 0008h
Return: CF undefined
SeeAlso: AX=FFDDh/BX=0007h
--------U-16FFDDBX0009-----------------------
INT 16 U - PC Tools v6.0+ PCShell API - GET PCRUN PARAMETERS
        AX = FFDDh
        BX = 0009h
Return: CF clear if successful
            DS:SI -> list of pointers (see #00624)

Format of PC Tools PCShell returned pointer list:
Offset  Size    Description     (Table 00624)
 00h    WORD    offset of WORD containing ???
 02h    WORD    offset of name of program to execute
 04h    WORD    offset of 80-byte buffer for ???
 06h    WORD    offset of buffer for ??? (length in WORD preceding buffer)
 08h    WORD    offset of buffer for ??? (length in WORD preceding buffer)
--------U-16FFDDBX000A-----------------------
INT 16 U - PC Tools v6.0+ PCRUN API - INSTALLATION CHECK
        AX = FFDDh
        BX = 000Ah
Return: CX = 5555h if running
        DX = 5555h
Note:   also sets a flag
--------U-16FFDDBX000B-----------------------
INT 16 U - PC Tools v6.0+ PCRUN API - ???
        AX = FFDDh
        BX = 000Bh
        ???
Return: CX = 5555h if PCRUN active
        DX = 5555h
Note:   also clears flag set by AX=FFDDh/BX=000Ah
--------U-16FFDE-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - DISPLAY POPUP MENU
        AX = FFDEh
        DS:DX -> menu description (must be on a paragraph boundary)
Return: AX = ???
            AL seems to be the number of the selected button
Note:   available only when popped up
SeeAlso: AX=FFEEh
--------U-16FFDF-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFDFh
        ???
Return: ???
--------U-16FFE0-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFE0h
        CX = ???
        DX = ???
Note:   available only when popped up
--------U-16FFE1-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - BEEP
        AX = FFE1h
--------U-16FFE2-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFE2h
        DX = ???
Return: ???
Note:   available only when popped up
--------U-16FFE3-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - PRINT CHARACTER
        AX = FFE3h
        BL = character to print to currently open printer or print file
Return: CF set on error
Note:   available only when popped up
SeeAlso: INT 17/AH=00h
--------U-16FFE4-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFE4h
        DX = segment of ???
Return: ???
Note:   available only when popped up
--------U-16FFE5-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - POP UP FILE SELECTION MENU
        AX = FFE5h
        DS:SI -> ASCIZ wildcard filespec followed by ASCIZ menu title
        DX = segment of window parameters???
Return: AX = DOS file handle for file
                DS:DX -> filename???
            FFFFh if function cancelled by user
Note:   available only when popped up
SeeAlso: AX=FFDAh
--------U-16FFE6-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - CHECK FOR AND GET KEYSTROKE
        AX = FFE6h
Return: AX = 0000h if no key available
             else  BIOS keycode
Notes:  available only when popped up
        invokes INT 28 idle interrupt before checking for key
--------U-16FFE7-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFE7h
        BX = segment of ???
Return: ???
Note:   available only when popped up
--------U-16FFE8-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - DISPLAY NUMBER
        AX = FFE8h
        CX = number
        DH = attribute
        DS:SI -> destination for ASCII number
Return: DS:SI buffer filled in with alternating characters and attributes
--------U-16FFE9-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - GET FILE LIST???
        AX = FFE9h
Return: BX = segment of file/directory list (14 bytes per file, NUL-padded)
Note:   available only when popped up
--------U-16FFEA-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - DISPLAY COUNTED STRING
        AX = FFEAh
        DS:SI -> counted string (count byte followed by string)
Return: ???
Note:   available only when popped up
--------U-16FFEB-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFEBh
        ???
Return: ???
--------U-16FFEC-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - GET KEY
        AX = FFECh
        DS:SI -> FAR routine to ???
        BX = ???
        ???
Return: AX = keystroke
            FFFFh if F10 pressed to go to menu
Notes:  available only when popped up
        invokes INT 28 while waiting for keystroke
        F10 is hotkey to Desktop menu
Index:  hotkeys;PC Tools DESKTOP
--------U-16FFED-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - GET ???
        AX = FFEDh
Return: AX = ???
Note:   available only when popped up
--------U-16FFEE-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - DEFINE PULLDOWN MENUS
        AX = FFEEh
        DS:SI -> pulldown menu system description (see #00625)
Return: AX destroyed
Notes:  available only when popped up
        if the accessory does not need any menu items of its own, it should
          call AX=FFFAh instead
SeeAlso: AX=FFF7h,AX=FFFAh

Format of PC Tools DESKTOP pulldown menu system description:
Offset  Size    Description     (Table 00625)
 00h    WORD    offset of menu bar contents (counted string)
 02h    WORD    number of items on menu bar
 04h 10 BYTEs   scan codes for hotkeying to each of up to ten menu items
 0Eh 10 BYTEs   which character to highlight in each menu item (01h=first)
 18h    WORD    offset of first menu definition (see #00626)
 1Ah    WORD    offset of second menu definition
        ...

Format of PC Tools DESKTOP menu definition:
Offset  Size    Description     (Table 00626)
 00h    WORD    offset of menu contents (see #00627)
 02h    WORD    number of entries in menu
 04h    for each entry:
                Offset  Size    Description
                 00h    BYTE    scancode of Alt-key to invoke entry
                 01h    BYTE    character to highlight (01h=first, etc)
                 02h    WORD    offset of FAR routine to handle selection

Format of PC Tools DESKTOP menu contents:
Offset  Size    Description     (Table 00627)
 00h    BYTE    number of lines in menu
 01h    BYTE    width of menu
 02h  N BYTEs   counted strings, one for each line in menu
--------U-16FFEFCX0000-----------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - INSTALLATION CHECK
        AX = FFEFh
        CX = 0000h
Return: CX = ABCDh if PC Tools DESKTOP.EXE installed
            BX = segment of resident portion
            AX = ??? (v5.1/5.5 only)
SeeAlso: AX=FEEFh,AX=FFC5h,AX=FFF3h
--------U-16FFF0-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - SET ???
        AX = FFF0h
        DX = ???
Return: AX destroyed
Note:   available only when popped up
--------U-16FFF1BX0000-----------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ALTERNATE INSTALLATION CHECK
        AX = FFF1h
        BX = 0000h  leave ??? flag as is
            nonzero set ??? flag
Return: CX = 5555h if installed
        DX = 5555h
--------U-16FFF2-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - DISPLAY HELP LINE
        AX = FFF2h
        DS:SI -> ASCIZ function key label string (each label preceded by '[')
                or help text
Return: AX destroyed
Notes:  available only when popped up
        if the specified string does not start with '[', it is displayed
          centered on the bottom line, else the function key labels are shown
--------U-16FFF3-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - PREPARE TO UNLOAD RESIDENT DESKTOP
        AX = FFF3h
Note:   releases any EMS being used; restores video mode, page, and cursor
          shape; and restores interrupt vectors
SeeAlso: AX=FFC5h,AX=FFEFh
Index:  uninstall;PC Tools DESKTOP
--------U-16FFF4-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - ???
        AX = FFF4h
        ???
Return: ???
Note:   available only when popped up
SeeAlso: AX=FFF6h
--------U-16FFF5-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - GET SCREEN ATTRIBUTE ARRAY
        AX = FFF5h
Return: ES:BX -> screen attributes data structure (see #00628)
        AL = ??? (v6.0+)

Format of PC Tools DESKTOP attribute data structure:
Offset  Size    Description     (Table 00628)
 -1     BYTE    attribute for desktop background
 00h    BYTE    attribute for normal characters on desktop menu
 01h    BYTE    attribute for highlighted characters on desktop menu
 02h  5 BYTEs   ???
 07h    BYTE    attribute for dialog boxes
 08h 15 BYTEs   ???
 17h    BYTE    attribute for message boxes
--------U-16FFF6-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - INVOKE NOTEPAD EDITOR
        AX = FFF6h
        DS = segment of editor buffer structure (see #00629)
        BX = ???
        DX = segment of window parameters structure (see #00622)
Return: ???
Note:   available only when popped up
SeeAlso: AX=FFF4h

Format of PC Tools DESKTOP editor buffer structure:
Offset  Size    Description     (Table 00629)
 00h    WORD    offset of current cursor position in buffer segment
 02h  2 BYTEs   ???
 04h    WORD    offset of beginning of file data in buffer segment
 06h 10 BYTEs   ???
 10h  N BYTEs   ASCIZ name of file being edited
--------U-16FFF7-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - PROCESS MENU BAR ENTRY???
        AX = FFF7h
        DS:SI -> ???
        ???
Return: ???
Notes:  available only when popped up
        performs input processing on the menu bar set up with AX=FFEEh
SeeAlso: AX=FFEEh,AX=FFFBh
--------U-16FFF8-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - DRAW EMPTY WINDOW
        AX = FFF8h
        DS:0000h -> window parameters structure (see #00622)
        DS:BX -> DWORD to store address of ??? on screen
Return: ???
--------U-16FFF9-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - DEFINE SCREEN REFRESH ROUTINE
        AX = FFF9h
        ES:BX -> FAR routine to redisplay the utility's window
Note:   available only when popped up
--------U-16FFFA-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - DEFINE STANDARD PULLDOWN MENUS
        AX = FFFAh
Notes:  available only when popped up
        adds the "Window" option to the "Desktop" option which is the only one
          available when no accessories are active.  Unlike AX=FFEEh, no
          additional menu items are added between "Desktop" and "Window"
SeeAlso: AX=FFEEh,AX=FFFBh
--------U-16FFFB-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - PROCESS STANDARD MENU BAR
        AX = FFFBh
Return: ???
Notes:  available only when popped up
        performs input processing on the standard menu bar set up with AX=FFFAh
SeeAlso: AX=FFF7h
--------U-16FFFC-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - GET HOTKEYS AND KEYBOARD VECTOR
        AX = FFFCh
Return: ES:BX -> hotkey table (see #00630)
        DS:DX = original INT 09 vector

Format of PC Tools DESKTOP hotkey table:
Offset  Size    Description     (Table 00630)
 00h  2 BYTEs   scancode/shift state for desktop hotkey
 02h  2 BYTEs   scancode/shift state for clipboard paste key
 04h  2 BYTEs   scancode/shift state for clipboard copy key
 06h  2 BYTEs   scancode/shift state for screen autodial key
--------U-16FFFD-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - COPY ???
        AX = FFFDh
Return: AX destroyed
Note:   copies 4000 bytes from ??? to ??? under certain circumstances
SeeAlso: AX=FF91h,AX=FF92h
--------M-16FFFE-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - SHOW MOUSE CURSOR
        AX = FFFEh
SeeAlso: AX=FFFFh,INT 33/AX=0001h
--------M-16FFFF-----------------------------
INT 16 U - PC Tools v5.1-8.0 DESKTOP - HIDE MOUSE CURSOR
        AX = FFFFh
SeeAlso: AX=FFFEh,INT 33/AX=0002h
--------P-17----DX0ABC-----------------------
INT 17 - PRINTER - LPTx v5.x INSTALLATION CHECK
        DX = 0ABCh
Return: AX = AAAAh
        DX = BAAAh
        ES = code segment of resident portion
--------P-17----DX0B90-----------------------
INT 17 - PRINTER - LPTx v6.x INSTALLATION CHECK
        DX = 0B90h
Return: DX = ABBBh
        ES = code segment of resident portion
--------P-17----DX0B91-----------------------
INT 17 - PRINTER - LPTx v7.x INSTALLATION CHECK
        DX = 0B91h
Return: DX = ABCBh
        ES = code segment of resident portion
--------P-17----DX0F5F-----------------------
INT 17 - PRINTER - LPTx v4.x INSTALLATION CHECK
        DX = 0F5Fh
Return: AX = AAAAh
        DX = F555h
        ES = code segment of resident portion
--------B-1700-------------------------------
INT 17 - PRINTER - WRITE CHARACTER
        AH = 00h
        AL = character to write
        DX = printer number (00h-02h)
Return: AH = printer status (see #00631)
SeeAlso: AH=02h,AH=84h"AX",AX=6F02h,AH=F1h,INT 16/AX=FFE3h,INT 1A/AH=11h"NEC"
SeeAlso: INT 4B/AH=00h,PORT 0278h"PRINTER",MEM 0040h:0008h,MEM 0040h:0078h

Bitfields for printer status:
Bit(s)  Description     (Table 00631)
 7      not busy
 6      acknowledge
 5      out of paper
 4      selected
 3      I/O error
 2-1    unused
 0      timeout
Note:   for Tandy 2000, bit 7 indicates printer-busy when set rather than clear
--------B-1701-------------------------------
INT 17 - PRINTER - INITIALIZE PORT
        AH = 01h
        DX = printer number (00h-02h)
Return: AH = printer status (see #00631)
Note:   some printers report that they are ready immediately after
          initialization when they actually are not; a more reliable result may
          be obtained by calling AH=02h after a brief delay
SeeAlso: AH=02h,AH=FFh"PC-MOS",INT 1A/AH=10h"NEC",INT 4B/AH=01h
--------B-1702-------------------------------
INT 17 - PRINTER - GET STATUS
        AH = 02h
        DX = printer number (00h-02h)
Return: AH = printer status (see #00631)
Note:   PRINTFIX from MS-DOS 5.0 hooks this function and always returns AH=90h
SeeAlso: AH=01h,AH=F2h,INT 1A/AH=12h"NEC",INT 4B/AH=02h
--------P-1702--DX0000-----------------------
INT 17 - INSET - INSTALLATION CHECK
        AH = 02h
        DX = 0000h
        CX = 07C3h (1987d)
Return: CX = 07C2h (1986d) if installed
Program: INSET is a text/graphics integration program
--------b-170200BX5050-----------------------
INT 17 - Enhanced Parallel Port (EPP) BIOS - INSTALLATION CHECK
        AX = 0200h
        BX = 5050h ('PP')
        CH = 45h   ('E')
        DX = printer port number (00h-02h)
Return: AH = status
            00h if installed and port is an enhanced parallel port
                CX:AL = installed BIOS type
                    5050h:45h ('PPE') if EPP v3.0+ BIOS installed
                    4550h:50h ('EPP') if EPP v1.0 BIOS installed
                ---EPP 1.0, 3.0---
                DX:BX -> far entry point to Advanced BIOS (see #00632)
                ---EPP Revision 7---
                DX = EPP I/O base address
                ES:BX -> far entry point to EPP BIOS (see #00632,#00633)
            03h if installed but specified port not supported
                CF set
Program: The Enhanced Parallel Port BIOS provides support for parallel
          port peripherals using the enhanced modes of the IEEE 1284.
SeeAlso: AH=E0h,MEM 0040h:0008h,MEM 0040h:00DCh

(Table 00632)
Call EPP BIOS entry point with:
        DL = port number (v1.0,v3.0)
        DX = (Revision 7) EPP port I/O base address
        AH = function
            00h Query Configuration
                Return: AH = 00h if successful
                            AL = IRQ number used by port or FFh if no IRQ
                            BH = EPP BIOS revision (major in high nybble,
                                  minor in low nybble)
                            BL = I/O capabilities (see #00635)
                            ES:DI -> ASCIZ driver information/version text
                            ---v1.0,v3.0---
                            CX = I/O port base address for parallel port
                            ---Revision 7---
                            CL = EPP chipset code (see #00636)
                            CH = hardware manufacturer's product code
            01h Set Mode
                AL = mode bits (see #00637)
                Return: AX,BX destroyed
            02h Get Mode
                Return: AL = mode bits (see also #00637)
                                bit 7: EPP port interrupts enabled
                        AH = 00h
                        CF clear
                        BX destroyed
            03h Interrupt Control
                AL = subfunction
                    00h enable parallel port interrupts
                    01h disable parallel port interrupts
                Return: AH = status (00h,05h,06h) (see also #00634)
            04h EPP Reset
                Return: AH = 00h if successful
                        AL destroyed
            05h perform Address-Write/Device-Select I/O cycle
                AL = device address
                Return: AH = status
                        AL destroyed
            06h perform Address-Read I/O cycle
                Return: AL = returned address/device data
                        AH = status
            07h write byte
                AL = data byte to write
                Return: AH = status
            08h output block of data
                DS:SI -> block of data to be sent to parallel port
                CX = number of bytes to output
                Return: AH = status (see #00634)
                        CX = number of unsent bytes
            09h read byte of data
                Return: AH = status (see #00634)
                        AL = byte read from parallel port
            0Ah read block of data
                ES:DI -> buffer for received data
                CX = number of bytes to read from paralle port
                Return: AH = status (see #00634)
                        ES:DI buffer filled if successful
                        CX = number of bytes not transferred
            0Bh Address/Byte-Read
                AL = device address
                Return: AH = status (see #00634)
                        AL = byte read if successful
            0Ch Address/Byte-Write
                AL = device address
                DH = data byte (v1.0,v3.0)
                CL = data byte (Revision 7)
                Return: AH = status (see #00634)
            0Dh Address/Block-Read
                AL = device address
                ES:DI -> buffer for received data
                CX = number of bytes to read
                Return: AH = status (see #00634)
                        CX = number of bytes NOT transferred
            0Eh Address/Block-Write
                AL = device address
                ES:DI -> data to be sent (v1.0,v3.0)
                DS:SI -> data to be send (Revision 7)
                CX = number of bytes to write
                Return: AH = status (see #00634)
                        CX = number of bytes NOT transferred
            0Fh Lock Port
                AL = multiplexor port number
                        bits 7-4: daisy chain port number (1-8)
                        bits 3-0: mux device port number (1-8, 0 if no mux)
                Return: AH = status (00h,03h,05h) (see #00634)
            10h Unlock Port
                AL = multiplexor port number
                        bits 7-4: daisy chain port number (1-8)
                        bits 3-0: mux device port number (1-8, 0 if no mux)
                Return: AH = status (00h,03h,05h) (see #00634)
            11h Device Interrupt
                BL = multiplexor port number
                        00h if no multiplexor, else mux device port (01h-08h)
                AL = subfunction
                    00h disable device interrupts
                    01h enable device interrupt
                        ES:DI -> interrupt event handler
                Return: AH = status (00h,03h,05h,06h) (see #00634)
                Note:   AMI BIOS v1.00.12.AX1T ignores the multiplexor port
                          number; it also always sets INT 0F to the address
                          specified in ES:DI
            12h Real-Time Mode
                AL = subfunction
                    00h check whether any real-time devices present
                    01h add (advertise) real-time device
                    02h remove real-time device
                Return: AH = status (00h,05h,06h,07h) (see #00634)
                        AL = real-time devices present? (00h no, 01h yes)
                Note:   unlike all other functions, this one does not use DL/DX
Return: AH = status (see #00634)
        CF clear if successful
        CF set on error
        BX destroyed
SeeAlso: #00633

(Table 00633)
Call EPP BIOS (Revision 7) entry point multiplexor functions with:
        DX = EPP port base I/O address
        AH = function
            40h Query Mux
                Return: AH = status (see #00634)
                        AL = currently-selected port
                        CH = status flags
                                bit 0: channel locked
                                bit 1: interrupt pending
                        BH destroyed
                Note:   the PhoenixBIOS v4.0 documentation lists BL as the
                          currently-selected port and AL as the status flags
            41h Query Device Port
                AL = EPP multiplex device port (1-8)
                Return: AH = status (see #00634)
                        CH = status flags (see #00638)
                        BX = EPP product/device ID (0000h if undefined)
                Note:   the PhoenixBIOS v4.0 documentation lists AL as the
                          status flags and CX as the device ID
            42h Set Product ID
                AL = EPP multiplex device port (1-8)
                CX = EPP product ID
                Return: AH = status (see #00634)
                        BX destroyed
            50h Query Daisy Chain
                AL = EPP multiplexor device port (1-8)
                Return: AH = status (see #00634)
                        CH = status flags
                                bit 0: channel locked
                                bit 1: interrupt pending
                        BL = currently-selected device
                        BH = EPP daisy chain revision (high nybble = major)
                        CL = daisy-chain depth (00h if no daisy chain)
                        ES:DI -> ASCIZ driver vendor identification string
                Note:   the PhoenixBIOS v4.0 documentation lists AH=51h as
                          "Query Daisy Chain" and BL as the multiplexor port;
                          it also lists AL as status flags on return
            51h Rescan Daisy Chain (dynamically reassign port numbers)
                AL = EPP multiplexor device port (1-8)
                Return: AH = status (see #00634)
                        BX destroyed
                Note:   the PhoenixBIOS v4.0 documentation lists AH=50h as
                          "Rescan Daisy Chain" and BL as the multiplexor port
Notes:  these functions are only valid if a port multiplexor or daisy chain
          is present
        PhoenixBIOS 4.0 documents function 50h as "Rescan" and 51h as
          "Query Daisy Chain"
SeeAlso: #00632,INT 2D/AL=DCh

(Table 00634)
Values for EPP BIOS function status:
 00h    successful
 02h    unsupported command/feature
 03h    unsupported parallel port
 05h    unsupported in current mode
 06h    invalid subfunction
 07h    already ???
 20h    multiplexor not present (AMI)
 40h    multiplexor not present
 41h    multiplexor currently locked
 80h    I/O timeout
 FFh    invalid/unsupported function
SeeAlso: #00632,#00633

Bitfields for EPP (v3.0, Revision 7) I/O capabilities:
Bit(s)  Description     (Table 00635)
 0      multiplexor present
 1      PS/2 bi-directional capable
 2      daisy chain present
 3      ECP capable
 4      EPP software emulation supported
 5      EPP capable
 6      fast Centronics supported
 7      standard EPP I/O map
SeeAlso: #00632

(Table 00636)
Values for EPP (Revision 7) chipset code:
 00h    Intel SL
 01h    FarPoint Communications
 02h    SMC
 03h    Chips&Technologies
 04h    Western Digital
 05h    National Semiconductor
SeeAlso: #00632

Bitfields for EPP BIOS mode bits:
Bit(s)  Description     (Table 00637)
 0      set compatibility mode
 1      set bi-directional mode
 2      set EPP mode
---Revision 7,v3.0---
 3      set ECP mode
 4      set EPP software emulation
 5      set fast Centronics mode
 6-7 reserved (0)
SeeAlso: #00632,#M0053

Bitfields for EPP BIOS multiplex status flags:
Bit(s)  Description     (Table 00638)
 0      port is selected
 1      port is locked
 2      interrupts are enabled
 3      interrupt pending
SeeAlso: #00633
--------P-1703-------------------------------
INT 17 U - Emulaser ELTSR - INSTALL INTERRUPT HANDLERS
        AH = 03h
Return: BX = ???
        CX = ???
Program: ELTSR is the resident portion of the Emulaser PostScript emulator by
          Vertisoft Systems, Inc.
SeeAlso: AH=04h"Emulaser",AH=0Eh,INT 1A/AH=E5h
----------1703-------------------------------
INT 17 - IBM SurePath BIOS - Officially "Private" Function
        AH = 03h
SeeAlso: AH=04h"IBM",AH=05h"IBM"
--------c-1703-------------------------------
INT 17 - PC-MOS/386 v5.01 - PRINT SPOOLER - PRINT STRING
        AH = 03h
        DX = printer port number
        CX = number of characters to print
        DS:SI -> string
Return: AH = printer status (see #00631)
        CX = number of characters actually printed
Desc:   send an entire string of chars to the print spooler with a single call
Program: PC-MOS/386 v5.01 is a multitasking, multiuser MS-DOS 5.0-compatible
          operating system by The Software Link, Inc.
SeeAlso: AH=00h,AH=01h,AH=02h,AH=FFh"PC-MOS"
--------c-1703--BX5A00-----------------------
INT 17 - DMP Print Spooler v2.03 - INSTALLATION CHECK
        AH = 03h
        BX = 5A00h
Return: AX = 5ACBh
        DI = 0000h
        ES = DMP code segment (also data segment)
Program: DMP is a Printer driver/spooler, by DMP (USA), available on the
          PCTODAY disk, volume 10, March 1991
--------N-170300-----------------------------
INT 17 - DOSISODE to WATTCP TSR Interface - "socket"
        AX = 0300h
        CX = type of socket from  socket( domain, type, protocol )
        DX = local identifier of socket (0 - 31)
Return: AX = 0000h success
            CX = segment of 4500 byte transfer buffer
            DX = offset of 4500 byte transfer buffer
           = FFFFH failure
            CX = error code
                ENFILE      23
Program: DOSISODE is the ISO developers environment which has been ported to
          DOS and will run with the Waterloo TCP turned into a resident TSR.
          Currently it allows a maximum of 6 open sockets.
Note:   this function will initialize the interface the first time it is
          called
SeeAlso: AX=0400h"DOSISODE",AX=0600h"DOSISODE",AX=0800h"DOSISODE"
SeeAlso: AX=0A00h"DOSISODE",AX=0C00h"DOSISODE",AX=0E00h"DOSISODE"
--------P-1704-------------------------------
INT 17 U - Emulaser ELTSR - BEGIN CAPTURING OUTPUT
        AH = 04h
Note:   has no effect unless ELTSR is deactivated (see AX=0503h)
SeeAlso: AH=03h"Emulaser",AX=0503h,INT 1A/AH=E5h
----------1704-------------------------------
INT 17 - IBM SurePath BIOS - Officially "Private" Function
        AH = 04h
SeeAlso: AH=03h"IBM",AH=05h"IBM"
--------N-170400-----------------------------
INT 17 - DOSISODE to WATTCP TSR Interface - "bind"
        AX = 0400h
Note:   this function just returns
SeeAlso: AX=0300h"DOSISODE",AX=0500h"DOSISODE",AX=0C00h"DOSISODE"
----------1705-------------------------------
INT 17 - IBM SurePath BIOS - Officially "Private" Function
        AH = 05h
SeeAlso: AH=03h"IBM",AH=04h"IBM"
--------P-170500-----------------------------
INT 17 U - Emulaser ELTSR - ???
        AX = 0500h
        ???
Return: AX = unload status (0001h safe to unload, 0002h not safe)
        BX = ???
        CX = PSP segment of ELTSR
        DX = activity flag (0000h disabled, 0001h capturing, 0002h ???printing)
        SI = ???
        DI = ???
SeeAlso: AH=04h,INT 1A/AH=E5h
--------N-170500-----------------------------
INT 17 - DOSISODE to WATTCP TSR Interface - "connect"
        AX = 0500h
SeeAlso: AX=0400h"DOSISODE",AX=0700h"DOSISODE",AX=0C00h"DOSISODE"
--------P-170501-----------------------------
INT 17 U - Emulaser ELTSR - UNHOOK INTERRUPTS
        AX = 0501h
Return: (see AX=0500h)
Note:   restores interrupt vectors without checking whether they have been
          hooked by later programs; should only be called if ELTSR reports
          that it is safe to unload
SeeAlso: AH=04h,AX=0500h,AX=0503h,INT 1A/AH=E5h
Index:  uninstall;Emulaser ELTSR
--------P-170502-----------------------------
INT 17 U - Emulaser ELTSR - SET ???
        AX = 0502h
        BL = Emulaser port (31h = LPT1, 32h = LPT2, 33h = LPT3)
        CL = ???
        DL = ???
Return: (see AX=0500h)
SeeAlso: AH=04h,AX=0500h,INT 1A/AH=E5h
--------P-170503-----------------------------
INT 17 U - Emulaser ELTSR - DEACTIVATE???
        AX = 0503h
Return: (see AX=0500h)
SeeAlso: AH=04h,AX=0500h,AX=0501h,INT 1A/AH=E5h
--------P-1706-------------------------------
INT 17 U - Emulaser ELTSR - ???
        AH = 06h
        ???
Return: ???
SeeAlso: AX=0500h,AX=0503h,AH=07h"ELTSR",INT 1A/AH=E5h
--------N-170600-----------------------------
INT 17 - DOSISODE to WATTCP TSR Interface - "listen"
        AX = 0600h
Note:   this function just returns
SeeAlso: AX=0300h"DOSISODE",AX=0700h"DOSISODE",AX=0C00h"DOSISODE"
SeeAlso: AX=0E00h"DOSISODE"
--------P-1707-------------------------------
INT 17 U - Emulaser ELTSR - OPEN CAPTURE FILE
        AH = 07h
        ES:DX -> ASCIZ filename to be opened
Return: ???
Note:   new output will be appended to the specified file
SeeAlso: AH=08h,INT 1A/AH=E5h
--------N-170700-----------------------------
INT 17 - DOSISODE to WATTCP TSR Interface - "accept"
        AX = 0700h
Note:   this function just returns
SeeAlso: AX=0600h"DOSISODE",AX=0800h"DOSISODE",AX=0C00h"DOSISODE"
--------P-1708-------------------------------
INT 17 U - Emulaser ELTSR - CLOSE CAPTURE FILE
        AH = 08h
        ???
Return: ???
Desc:   close the file previously opened by function 07h
SeeAlso: AH=07h,INT 1A/AH=E5h
--------N-170800-----------------------------
INT 17 - DOSISODE to WATTCP TSR Interface - "recvfrom"
        AX = 0800h
SeeAlso: AX=0500h"DOSISODE",AX=0900h"DOSISODE",AX=0A00h"DOSISODE"
--------P-1709-------------------------------
INT 17 U - Emulaser ELTSR - PRINT CAPTURE FILE???
        AH = 09h
        BX = ???
        CX = ???
        DX = printer port (01h COM1, 02h COM2, 05h LPT1, 06h LPT2)
Return: AX = status
            00h successful
            FFh failed
Program: ELTSR is the resident portion of the Emulaser PostScript emulator by
          Vertisoft Systems, Inc.
Note:   this function calls through to INT 1A/AX=E401h, and thus requires
          that either ELSPL or Disk Spool II be installed
SeeAlso: AH=0Ah,INT 1A/AX=E401h,INT 1A/AH=E5h
--------N-170900-----------------------------
INT 17 - DOSISODE to WATTCP TSR Interface - "sendto"
        AX = 0900h
SeeAlso: AX=0700h"DOSISODE",AX=0800h"DOSISODE",AX=0A00h"DOSISODE"
--------P-170A-------------------------------
INT 17 U - Emulaser ELTSR - SET ??? FILENAME
        AH = 0Ah
        ES:BX -> ??? buffer
        CX = length of ??? buffer
Return: ???
Note:   copies the specified name into the buffer passed to ELSPL as the
          filename by AH=09h
SeeAlso: AH=09h,INT 1A/AH=E5h
--------N-170A00-----------------------------
INT 17 - DOSISODE to WATTCP TSR Interface - "select"
        AX = 0A00h
SeeAlso: AX=0800h"DOSISODE",AX=0B00h"DOSISODE",AX=0E00h"DOSISODE"
--------P-170B-------------------------------
INT 17 U - Emulaser ELTSR - GET ???
        AH = 0Bh
Return: AX:BX -> ???
SeeAlso: AH=0Ah,INT 1A/AH=E5h
----------170B-------------------------------
INT 17 - IBM SurePath BIOS - Officially "Private" Function
        AH = 0Bh
SeeAlso: AH=03h"IBM",AH=0Ch"IBM"
--------N-170B00-----------------------------
INT 17 - DOSISODE to WATTCP TSR Interface - "ioctl"
        AX = 0B00h
        DX = local identifier of socket (0 - 31)
Note:   this function sets the socket into non_block mode
SeeAlso: AX=0A00h"DOSISODE",AX=0C00h"DOSISODE",AX=0E00h"DOSISODE"
--------P-170C-------------------------------
INT 17 U - Emulaser ELTSR - SET ??? FLAG
        AH = 0Ch
        ???
Return: ???
SeeAlso: AH=0Bh,INT 1A/AH=E5h
----------170C-------------------------------
INT 17 - IBM SurePath BIOS - Officially "Private" Function
        AH = 0Ch
SeeAlso: AH=0Bh"IBM",AH=0Dh"IBM"
--------N-170C00-----------------------------
INT 17 - DOSISODE to WATTCP TSR Interface - "close"
        AX = 0C00h
SeeAlso: AX=0300h"DOSISODE",AX=0500h"DOSISODE",AX=0D00h"DOSISODE"
--------P-170D-------------------------------
INT 17 U - Emulaser ELTSR - GET TRUE ScrlLk STATE
        AH = 0Dh
Return: AX = state (0000h off, 0010h on)
Desc:   determine the actual state of ScrlLk even when Emulaser is controlling
          the ScrlLk light as its activity indicator
SeeAlso: AH=0Ch,INT 16/AH=02h,INT 1A/AH=E5h
----------170D-------------------------------
INT 17 - IBM SurePath BIOS - Officially "Private" Function
        AH = 0Dh
SeeAlso: AH=0Ch"IBM",AH=0Eh"IBM"
--------N-170D00-----------------------------
INT 17 - DOSISODE to WATTCP TSR Interface - "shutdown" - SHUTDOWN INTERFACE
        AX = 0D00h
Note:   this function is used to shutdown the interface
SeeAlso: AX=0C00h"DOSISODE",AX=0E00h"DOSISODE"
--------P-170E-------------------------------
INT 17 U - Emulaser ELTSR - BACKGROUND PROCESSING
        AH = 0Eh
Program: ELTSR is the resident portion of the Emulaser PostScript emulator by
          Vertisoft Systems, Inc.
Note:   this function is called by ELTSR on every INT 08 to allow data to be
          processed in the background, but may also be called by applications
          to give Emulaser additional CPU time
SeeAlso: AH=0Dh,INT 1A/AH=E5h
----------170E-------------------------------
INT 17 - IBM SurePath BIOS - Officially "Private" Function
        AH = 0Eh
SeeAlso: AH=03h"IBM",AH=0Dh"IBM",AH=80h"IBM"
--------N-170E00-----------------------------
INT 17 - DOSISODE to WATTCP TSR Interface - INSTALLATION CHECK
        AX = 0E00h
Return: CX = 1234h if installed
Program: DOSISODE is the ISO developers environment which has been ported to
          DOS and will run with the Waterloo TCP turned into a resident TSR.
          Currently it allows a maximum of 6 open sockets.
Note:   this function is used to check if the interface is loaded
SeeAlso: AX=0300h"DOSISODE",AX=0A00h"DOSISODE"
--------P-172000-----------------------------
INT 17 - PC Paint Plus 2.0 - PRINTER DRIVER - INSTALLATION CHECK
        AX = 2000h
        BL = printer number???
Return: AX = status (see #00639)
        BX = driver version number (BH=major,BL=minor)
        CH = ??? (00h)
        CL = ???
        DX = ??? (0100h)
Note:   also enables the remaining printer driver functions (2001h-2007h)
SeeAlso: AX=2001h,AX=2002h,AX=2003h,AX=2004h,AX=2005h,AX=2006h,AX=2007h

(Table 00639)
Values for PC Paint function status:
 0000h  successful
 0001h  invalid printer???
 0002h  ???
 0003h  invalid subfunction
 0005h  driver disabled, must call function 00h first
 0009h  unknown printer error
 000Bh  printer not selected
 000Ch  printer out of paper
 000Eh  error while writing to serial printer
 000Fh  ???
 0010h  invalid function number
 0011h  value out of range
--------P-172001-----------------------------
INT 17 - PC Paint Plus 2.0 - PRINTER DRIVER - SET ??? FLAG
        AX = 2001h
        BL = printer number???
Return: AX = status (see #00639)
--------P-172002-----------------------------
INT 17 - PC Paint Plus 2.0 - PRINTER DRIVER - GET INFORMATION
        AX = 2002h
        BL = printer number???
        CL = desired information
            00h printer type
                Return: ES:DI -> ASCIZ printer name
            01h paper size
                DX = size index
                Return: ES:DI -> ASCIZ paper size description
            02h ???
                Return: BX = ???
            03h printer information???
                DX = ???
                ES:BX -> buffer for ??? (min 134 bytes)
Return: AX = status (see #00639)
SeeAlso: AX=2000h,AX=2004h
--------P-172003-----------------------------
INT 17 - PC Paint Plus 2.0 - PRINTER DRIVER - ???
        AX = 2003h
        ES:BX -> ???
Return: AX = status (see #00639)
SeeAlso: AX=2000h,AX=2004h
--------P-172004-----------------------------
INT 17 - PC Paint Plus 2.0 - PRINTER DRIVER - GET ???
        AX = 2004h
        BL = printer number???
Return: AX = status (see #00639)
        ES:DI -> ???
SeeAlso: AX=2000h,AX=2003h
--------P-172005-----------------------------
INT 17 - PC Paint Plus 2.0 - PRINTER DRIVER - ADVANCE PRINTER TO NEXT PAGE
        AX = 2005h
        BL = printer number???
Return: AX = status (see #00639)
Note:   this function also clears the flag set by AX=2001h
SeeAlso: AX=2000h,AX=2001h,AX=2006h
--------P-172006-----------------------------
INT 17 - PC Paint Plus 2.0 - PRINTER DRIVER - ADVANCE TO NEXT PAGE & SHUT DOWN
        AX = 2006h
        BL = printer number???
Return: AX = status (see #00639)
Note:   this function also clears the flag set by AX=2001h and disables
          functions other than AX=2000h
SeeAlso: AX=2000h,AX=2001h,AX=2005h
--------P-172007-----------------------------
INT 17 - PC Paint Plus 2.0 - PRINTER DRIVER - UNIMPLEMENTED
        AX = 2007h
Return: AX unchanged
SeeAlso: AX=2000h
--------N-172400-----------------------------
INT 17 - Shamrock Software NET.24 v3.11+ - ENABLE/DISABLE API FUNCTIONS
        AX = 2400h
        DL = new state
            00h disabled
            01h enabled
Return: DL = 24h if installed
        DH = minor version number
        CX = network address of this machine
        AL = status (see #00640)
SeeAlso: AX=2403h,INT 16/AX=4500h

(Table 00640)
Values for NET.24 function status:
 00h    successful
 01h    timeout
 02h    header error
 03h    data error
 04h    busy
 05h    invalid parameters
--------N-172401-----------------------------
INT 17 - Shamrock Software NET.24 v3.11+ - RECEIVE BLOCK, NO HANDSHAKE
        AX = 2401h
        BL = timeout in clock ticks
Return: AL = status (see #00640)
        DX:BX -> receive buffer
SeeAlso: AX=2402h,AX=2404h,AX=2408h
--------N-172402-----------------------------
INT 17 - Shamrock Software NET.24 v3.11+ - TRANSMIT BLOCK, NO HANDSHAKE
        AX = 2402h
        transmit buffer filled (see AX=2403h)
Return: AL = status (see #00640)
SeeAlso: AX=2401h,AX=2403h,AX=2404h,AX=2409h
--------N-172403-----------------------------
INT 17 - Shamrock Software NET.24 v3.11+ - GET STATUS AND TRANSMISSION BUFFER
        AX = 2403h
Return: AL = status (see #00640)
        CX = number of characters in receive ring buffer
        DX:BX -> transmit buffer
SeeAlso: AX=2400h,AX=2402h
--------N-172404-----------------------------
INT 17 - Shamrock Software NET.24 v3.11+ - SEND ACK BLOCK
        AX = 2404h
        BX = target address
Return: AL = status (see #00640)
SeeAlso: AX=2402h,AX=2405h
--------N-172405-----------------------------
INT 17 - Shamrock Software NET.24 v3.11+ - SEND NAK BLOCK
        AX = 2405h
        BX = target address
Return: AL = status (see #00640)
SeeAlso: AX=2402h,AX=2404h
--------N-172406-----------------------------
INT 17 - Shamrock Software NET.24 v3.11+ - PREPARE CHARACTER-ORIENTED RECEIVE
        AX = 2406h
Return: AL = status (see #00640)
SeeAlso: AX=2407h,AX=240Ah
--------N-172407-----------------------------
INT 17 - Shamrock Software NET.24 v3.11+ - RECEIVE CHARACTER FROM REMOTE
        AX = 2407h
Return: AL = status (see also #00640)
            06h end of data
        DL = received character
SeeAlso: AX=2406h
--------N-172408-----------------------------
INT 17 - Shamrock Software NET.24 v3.11+ - RECEIVE BLOCK, WITH HANDSHAKE
        AX = 2408h
Return: AL = status (see also #00640)
            06h end of data
        CX = number of bytes in receive buffer
        DX:SI -> receive buffer
SeeAlso: AX=2401h,AX=2405h,AX=2409h
--------N-172409-----------------------------
INT 17 - Shamrock Software NET.24 v3.11+ - TRANSMIT COMMAND, WITH HANDSHAKE
        AX = 2409h
        BX = target address
        CX = number of data bytes
        DL = command code to send
        DS:SI -> data bytes for command
Return: AL = status (see also #00640)
            03h no response
            06h remote currently unable to perform command
SeeAlso: AX=2405h,AX=2408h
--------N-17240A-----------------------------
INT 17 - Shamrock Software NET.24 v3.11+ - PREPARE CHARACTER-ORIENTED TRANSMIT
        AX = 240Ah
Return: AL = status (see #00640)
SeeAlso: AX=2406h,AX=240Bh,AX=240Ch
--------N-17240B-----------------------------
INT 17 - Shamrock Software NET.24 v3.11+ - TRANSMIT SINGLE CHARACTER TO REMOTE
        AX = 240Bh
        DL = character to send
Return: AL = status (see also AX=2400h)
            03h transmission error
            06h write error
SeeAlso: AX=2407h,AX=240Ah,AX=240Ch
--------N-17240C-----------------------------
INT 17 - Shamrock Software NET.24 v3.11+ - END CHARACTER-ORIENTED TRANSMIT
        AX = 240Ch
Return: AL = status (see also AX=2400h)
            03h transmission error
            06h remote breaks connection
SeeAlso: AX=240Ah,AX=240Bh
--------p-174B00-----------------------------
INT 17 - Brother P-Touch - INSTALLATION CHECK
        AX = 4B00h
Return: AX = 4249h ('BI' = Brother International) if installed
            BX = program ID
                4550h ('EP') for "Epson FX-80 Emulator"
                5047h ('PG') for "Printer to Disk Utility"
            CX = numbero of parallel port being emulated or intercepted
SeeAlso: AX=4B01h
--------p-174B01-----------------------------
INT 17 - Brother P-Touch - UNINSTALL
        AX = 4B01h
Return: AX = segment of resident program or 0000h if unable to uninstall
Note:   the calling program must manually free both the indicated segment
          and the environment segment for the TSR with INT 21/AH=49h
          (the environment is pointed at by the WORD at AX:002Ch)
SeeAlso: AX=4B00h,INT 21/AH=49h
--------J-175000-----------------------------
INT 17 - AX (Japanese AT) PRINTER - SET PRINTER COUNTRY CODE
        AX = 5000h
        BX = country code
            0001h USA (English), 0051h Japan
Return: AL = status
            00h successful
            01h bad country code
            02h other error
SeeAlso: AX=5001h,AH=51h,INT 10/AX=5000h,INT 16/AX=5000h
--------J-175001-----------------------------
INT 17 - AX (Japanese AT) PRINTER - GET PRINTER COUNTRY CODE
        AX = 5001h
Return: AL = status
            00h successful
                BX = country code
            02h error
SeeAlso: AX=5000h,AH=51h,INT 10/AX=5001h,INT 16/AX=5001h
--------J-1751-------------------------------
INT 17 - AX (Japanese AT) PRINTER - JIS to Shift-JIS CONVERSION
        AH = 51h
        DX = 2-byte JIS code
Return: DX = shift-JIS value or 0000h on error
Note:   one of AH=51h and AH=52h converts from JIS (Japanese Industry Standard)
          characters to Shift-JIS characters, and the other performs the
          opposite conversion
SeeAlso: AX=5000h,AH=52h
--------J-1752-------------------------------
INT 17 - AX (Japanese AT) PRINTER - Shift-JIS to JIS CONVERSION
        AH = 52h
        DX = 2-byte shift-JIS code
Return: DX = JIS code or 0000h on error
Note:   one of AH=51h and AH=52h converts from JIS (Japanese Industry Standard)
          characters to Shift-JIS characters, and the other performs the
          opposite conversion
SeeAlso: AH=51h
--------V-1760-------------------------------
INT 17 - FLASHUP.COM - INSTALLATION CHECK
        AH = 60h
Return: AL = 60h
        DX = CS of resident code
Notes:  FLASHUP.COM is part of Flash-Up Windows by The Software Bottling Co.
        FLASHUP also hooks INT 10 and receives commands via INT 10/AH=09h,0Ah
          consisting of an 80h followed by the actual command
SeeAlso: INT 10/AH=09h,INT 10/AH=0Ah
--------V-1761-------------------------------
INT 17 - SPEEDSCR.COM - INSTALLATION CHECK
        AH = 61h
Return: AL = 61h
        DX = CS of resident code
Note:   SPEEDSCR.COM is by The Software Bottling Co.
--------P-1762-------------------------------
INT 17 U - T2PS v1.0 - UNINSTALL
        AH = 62h
Return: nothing
SeeAlso: AH=63h,AH=64h,INT 05/AX=554Eh
--------P-1763-------------------------------
INT 17 U - T2PS v1.0 - SET PARAMETERS
        AH = 63h
        ES:SI -> settings (see #00641)
Program: T2PS is a shareware ASCII-to-PostScript converter by A.N.D.
          Technologies
SeeAlso: AH=62h,AH=64h,INT 05/AX=4E57h

Format of T2PS settings:
Offset  Size    Description     (Table 00641)
 00h    WORD    LPT port number (0=LPT1, etc.)
 02h    WORD    page heigh in points
 04h    WORD    page width in points
 06h    WORD    top margin in points
 08h    WORD    bottom margin in points
 0Ah    WORD    left margin in points
 0Ch    WORD    right margin in points
 0Eh    WORD    font size in points
 10h    WORD    tab size
 12h    WORD    timeout in clock ticks
--------P-1764-------------------------------
INT 17 U - T2PS v1.0 - GET PARAMETERS
        AH = 64h
        ES:SI -> buffer for settings (see #00641)
Return: ES:SI buffer filled
SeeAlso: AH=62h,AH=63h,INT 05/AX=5053h
--------b-176F00BX0000-----------------------
INT 17 - HP Vectra - EXTENDED BIOS - "F17_INQUIRE" - INSTALLATION CHECK
        AX = 6F00h
        BX = 0000h
Return: BX = 4850h ("HP") if HP Extended BIOS printer extensions available
SeeAlso: AX=6F02h,INT 14/AX=6F00h,INT 10/AX=6F00h,INT 14/AX=6F00h
SeeAlso: INT 33/AX=6F00h,INT 6F/AH=00h"HP Vectra"
--------b-176F02-----------------------------
INT 17 - HP Vectra - EXTENDED BIOS - "F17_PUT_BUFFER" - PRINT BUFFER
        AX = 6F02h
        CX = size of buffer in bytes
        DX = port number (0-3)
        ES:DI -> buffer containing characters to be printed
Return: AH = printer status (see #00631)
        CX = number of bytes successfully printed
        ---on error (AH bit 0 set)---
            ES:DI -> next byte to be sent
        ---if successful---
            ES:DI unchanged
SeeAlso: AH=00h,AX=6F00h,INT 14/AX=6F02h
----------1780-------------------------------
INT 17 - IBM SurePath BIOS - Officially "Private" Function
        AH = 80h
SeeAlso: AH=03h"IBM",AH=0Bh"IBM"
--------N-1781-------------------------------
INT 17 - Alloy NTNX, MW386 - CANCEL JOBS FOR CURRENT USER
        AH = 81h
        AL = 00h (NTNX compatibility mode)
        CL = number of jobs to cancel
Return: AL = status (see #00642)
Note:   this function cancels the last CL printouts for the current task
SeeAlso: AH=82h

(Table 00642)
Values for Alloy status:
 00h    success
 01h-7Fh warning
 80h    general failure
 81h    host overloaded (NTNX only)
 82h    module busy (NTNX only)
 83h    host busy (NTNX only)
 84h    re-entry flag set
 85h    invalid request
 86h    invalid printer
 87h    invalid process ID
 89h    access denied
 8Ah    option not available for given port type
 8Bh    option not available for given task type
 91h    printer busy
 C2h    file not found
 C3h    path not found
 C4h    file access failure
--------N-1782-------------------------------
INT 17 - Alloy NTNX, MW386 - CANCEL ALL JOBS FOR CURRENT USER
        AH = 82h
        AL = 00h (NTNX compatibility mode)
Return: AL = status (see #00642)
SeeAlso: AH=81h
--------N-1783-------------------------------
INT 17 - Alloy NTNX, MW386 - SET NUMBER OF COPIES
        AH = 83h
        AL = mode
            00h NTNX compatibility
                CL = number of copies (max 99, default 1)
            02h MW386 v2+
                BX = logical device number
                    00h-03h = LPT1-LPT4
                    04h-07h = COM1-COM4
                CX = number of copies
Return: AL = status (see #00642)
Note:   in NTNX compatibility mode, this function only affects LPT1
--------N-1784-------------------------------
INT 17 - Alloy NTNX, MW386 - GENERATE PRINT BREAK
        AH = 84h
        AL = mode
            00h NTNX compatibility
            02h MW386 v2+
                BX = logical device number
                    00h-03h = LPT1-LPT4
                    04h-07h = COM1-COM4
Note:   closes spool file and tells spooler to queue the print job (LPT1 only
          under MW386 in NTNX compatibility mode)
--------J-1784-------------------------------
INT 17 - AX (Japanese AT) PRINTER - OUTPUT CHARACTER WITHOUT CONVERSION
        AH = 84h
        AL = character
        DX = printer number
Return: AH = printer status (see #00631)
SeeAlso: AH=00h,AH=85h
--------J-1785-------------------------------
INT 17 - AX (Japanese AT) PRINTER - ENABLE/DISABLE CHARACTER CONVERSION
        AH = 85h
        AL = new state (00h enabled, 01h disabled)
SeeAlso: AH=84h"AX"
--------N-1787-------------------------------
INT 17 - Alloy NTNX - SET INDOS POINTER
        AH = 87h
        AL = 00h
        CX:BX -> buffer for user-written printer drivers
Return: BX,CX destroyed
Note:   must be executed before the printer is enabled
SeeAlso: AH=8Ah
--------N-1788-------------------------------
INT 17 - Alloy NTNX, MW386 - REMOVE PRINTER FROM SPOOLER
        AH = 88h
        AL = mode
            00h NTNX compatibility
                DX = NTNX printer number (see #00643)
            01h MW386
                DX = MW386 printer number
Return: AH = status (see #00642)
Note:   removes specified printer from the spooler's list of printers
SeeAlso: AH=89h,AH=8Bh

(Table 00643)
Values for Alloy NTNX printer number:
 00h    host LPT1
 01h    host LPT2
 02h    host LPT3
 03h    host LPT4
 04h    host COM1
 05h    host COM2
 06h    user's logical COM2
 07h    user's terminal AUX port
 08h    user's logical COM1 (MW386 only)
--------N-1789-------------------------------
INT 17 - Alloy NTNX, MW386 - ADD PRINTER TO SPOOLER
        AH = 89h
        AL = mode
            00h NTNX compatibility
                DX = NTNX printer number (see #00643)
            01h MW386
                DX = MW386 printer number
Return: AL = status (see #00642)
Note:   the specified printer is added to the spooler's list of available
          printers
SeeAlso: AH=88h,AH=8Bh
--------N-178A-------------------------------
INT 17 - Alloy NTNX - ACTIVATE USER-WRITTEN PRINTER DRIVER
        AH = 8Ah
        ???
SeeAlso: AH=92h
--------N-178B-------------------------------
INT 17 - Alloy MW386 - GET PHYSICAL DEVICE NUMBER FROM NAME
        AH = 8Bh
        DS:DX -> ASCIZ printer name
Return: AL = status (see also AH=81h)
            00h successful
                DX = physical device number
SeeAlso: AH=89h,AH=8Ch,INT 14/AH=20h"Alloy"
--------N-178C-------------------------------
INT 17 - Alloy MW386 - GET DEVICE NAME FROM PHYSICAL DEVICE NUMBER
        AH = 8Ch
        DX = physical device number
        ES:DI -> 17-byte buffer for ASCIZ device name
Return: AL = status (see also AH=81h)
            00h successful
                ES:DI buffer filled
SeeAlso: AH=88h,AH=8Bh
--------N-178D-------------------------------
INT 17 - Alloy NTNX,MW386 - RESET SPOOLER
        AH = 8Dh
        AL = 00h
Return: AL = status (see #00642)
Notes:  clears all buffers and resets spooler to boot-up values
        MW386 supports this function for compatibility only; it is a NOP
--------N-178E-------------------------------
INT 17 - Alloy NTNX - GET INT 28 ENTRY POINT
        AH = 8Eh
        AL = 00h
Return: CX:BX -> INT 28 entry point
SeeAlso: AH=8Fh
--------N-178F-------------------------------
INT 17 - Alloy NTNX - GET DOS INTERCEPT ENTRY POINT
        AH = 8Fh
        AL = 00h
Return: CX:BX -> DOS intercept routine
SeeAlso: AH=8Eh
--------N-1790-------------------------------
INT 17 - Alloy NTNX, MW386 - SPOOL FILE BY NAME
        AH = 90h
        AL = mode
            00h NTNX compatibility
                DL = printer code (FFh=current) (NTNX, MW386 v1.x only)
                DH = number of copies (FFh=current) (NTNX, MW386 v1.x only)
            02h MW386 v2+
                BX = logical device number
                    00h-03h = LPT1-LPT4
                    04h-07h = COM1-COM4
        CX:SI -> ASCIZ pathname
Return: AL = status (see #00642)
Note:   in mode 00h, the file is always sent to logical LPT1
SeeAlso: AH=A0h
--------N-1791-------------------------------
INT 17 - Alloy NTNX, MW386 - GET USER NUMBER AND CURRENT PRINTER
        AH = 91h
        AL = mode
            00h NTNX compatibility
                Return: CX = user number (00h = host)
                        DX = currently selected printer number (00h-08h)
            01h MW386
                Return: CX = user number
                        DX = physical dev number of currently selected printer
            02h MW386 v2+
                BX = logical device number
                    00h-03h = LPT1-LPT4
                    04h-07h = COM1-COM4
                Return: CX = user number
                        DX = physical device number
Return: AL = status (see #00642)
SeeAlso: AH=8Ch
--------N-1792-------------------------------
INT 17 - Alloy NTNX - CHECK PRINTER DRIVER
        AH = 92h
        AL = 00h
        CL = 00h
Return: CL = driver state
            01h initialized
            80h not initialized
        AX = status (see #00642)
SeeAlso: AH=8Ah
--------N-1794-------------------------------
INT 17 - Alloy NTNX, MW386 - SELECT PRINTER
        AH = 94h
        AL = mode
            00h NTNX compatibility
                DX = NTNX printer number (see #00643)
            01h MW386
                DX = MW386 printer number
            02h MW386 v2+
                BX = logical printer number
                DX = MW386 printer number
Return: AL = status (see #00642)
Note:   modes 00h and 01h affect only logical LPT1
SeeAlso: AH=8Bh,AH=95h
--------N-1795-------------------------------
INT 17 - Alloy NTNX, MW386 - GET CURRENT PRINTER
        AH = 95h
        AL = mode
            00h NTNX compatibility
                Return: DX = NTNX printer number (see #00643)
                            (FFFFh if current printer not compatible with NTNX)
            01h MW386
                Return: DX = MW386 printer number
            02h MW386 v2+
                BX = logical device number
                    00h-03h = LPT1-LPT4
                    04h-07h = COM1-COM4
                Return: DX = MW386 printer number (FFFFh = none)
Return: AL = status (see #00642)
Note:   modes 00h and 01h return the printer number of logical LPT1 only
SeeAlso: AH=94h
--------N-1796-------------------------------
INT 17 - Alloy NTNX - SET SERIAL PORT PARAMETERS
        AH = 96h
        AL = 00h
Note:   documentation states that this is a NOP, doing only XOR AX,AX before
          returning
SeeAlso: INT 14/AH=24h
--------N-1797-------------------------------
INT 17 - Alloy NTNX, MW386 - SET DATA DRIVEN PRINT BREAK
        AH = 97h
        AL = mode
            00h NTNX compatibility
            02h MW386 v2+
                BX = logical device number
                    00h-03h = LPT1-LPT4
                    04h-07h = COM1-COM4
        CH,CL,DH = three character break sequence
        DL = subfunction
            00h set break string
            else reset break
Return: AL = status (see #00642)
Notes:  mode 00h affects only logical LPT1
        when the break string is encountered, the spool file will be closed and
          queued for printing automatically
        the break string is not permanently saved, and will be reset each time
          MW386 or the user is rebooted
SeeAlso: AH=9Bh
--------N-1798-------------------------------
INT 17 - Alloy NTNX,MW386 - RESTART PRINTER
        AH = 98h
        AL = 00h
        DL = printer number (FFh=current)
Return: AL = status
            00h successful
            01h incorrect printer
            02h task not found
Note:   MW386 supports this function for compatibility only; it is a NOP
--------N-1799-------------------------------
INT 17 - Alloy NTNX, MW386 - GET/SET PRINTER MODE
        AH = 99h
        AL = mode
            00h NTNX compatibility
                DL = NTNX printer number (see #00643)
                        (FFh = task's current logical LPT1)
                DH = mode (see #00644)
            01h MW386
                DX = MW386 printer number
                CL = mode (as for DH above)
Return: AL = status (see #00642)
        DH = mode (bits 1 and 2 set as above)
        DL = printer owner's user number if not spooled

Bitfields for Alloy printer mode:
 0      get mode if 1, set mode if 0    (Table 00644)
 1      private ("attached")
 2      direct instead of spooled
 3-7    reserved (0)
--------N-179A-------------------------------
INT 17 - Alloy NTNX,MW386 - SET TAB EXPANSION
        AH = 9Ah
        AL = mode
            00h NTNX compatibility
                DX = NTNX printer number (see #00643)
                        (FFFFh = current logical LPT1)
            01h MW386
                DX = MW386 printer number
        CL = tab length (00h = no expansion, 01h-63h = spaces per tab)
Return: AL = status (see #00642)
Note:   beginning with MW386 v2.0, tab expansion is set on a per-printer basis
          rather than a per-user basis; NTNX and MW386 v1.x ignore DX
SeeAlso: AH=A4h
--------N-179B-------------------------------
INT 17 - Alloy NTNX,MW386 - SET PRINT BREAK TIMEOUT
        AH = 9Bh
        AL = mode
            00h NTNX compatibility
                CX = timeout value in clock ticks (1/18 sec) (00h = never)
            01h MW386
                CX = timeout value in seconds (00h = never)
            02h MW386 v2+
                BX = logical device number
                    00h-03h = LPT1-LPT4
                    04h-07h = COM1-COM4
                CX = timeout value in seconds (00h = never)
Return: AL = status (see #00642)
Notes:  modes 00h and 01h affect only the current logical LPT1
        if no data is sent to a printer for the specified amount of time, the
          spool file will be closed and queued for printing automatically
SeeAlso: AH=97h
--------N-17A0-------------------------------
INT 17 - Alloy MW386 - SPOOL COPY OF FILE
        AH = A0h
        AL = mode
            00h NTNX compatibility
                DX = ??? (NTNX, MW386 v1.x only)
            02h MW386 v2+
                BX = logical device number
                    00h-03h = LPT1-LPT4
                    04h-07h = COM1-COM4
        CX:SI -> ASCIZ pathname
Return: AL = status (see #00642)
Notes:  makes a copy of the specified file in the spooler's directory, allowing
          the original file to be modified or deleted while the copy is printed
        in mode 00h, the file is printed on logical LPT1
SeeAlso: AH=90h
--------N-17A4-------------------------------
INT 17 - Alloy MW386 - ENABLE/DISABLE FORM FEED
        AH = A4h
        AL = new state
            00h form feed after end of print job disabled
            01h form feed enabled
Return: AL = status (see #00642)
Note:   only affects the current logical LPT1
SeeAlso: AH=9Ah,AH=A6h,INT 7F/AH=05h"NTNX (Host)"
--------N-17A6-------------------------------
INT 17 - Alloy MW386 - ENABLE/DISABLE BANNER PAGE
        AH = A6h
        AL = new state
            00h banner page before print job disabled
            01h banner page enabled
Return: AL = status (see #00642)
Note:   only affects the current logical LPT1
SeeAlso: AH=A4h
--------N-17A7-------------------------------
INT 17 - Alloy MW386 v2+ - GET/SET SPOOL FLAGS
        AH = A7h
        AL = spool flags (see #00645)
        BX = logical device number
            00h-03h = LPT1-LPT4
            04h-07h = COM1-COM4
Return: AL = status (see #00642)
Note:   the documentation does not state which register contains the result of
          a GET
SeeAlso: AH=A4h,AH=A6h

Bitfields for Alloy spool flags:
Bit(s)  Description     (Table 00645)
 0      banner page enabled (see AH=A6h)
 1      form feed enabled (see AH=A4h)
 2-6    reserved (0)
 7      set flags if 1, get flags if 0
--------N-17A8-------------------------------
INT 17 - Alloy MW386 - DEFINE TEMPORARY FILENAME
        AH = A8h
        CX:SI -> ASCIZ filename without extension (max 8 chars)
Return: AL = status (see #00642)
Note:   allows application to specify banner page filename for spool files
          collected from the application's printer output
SeeAlso: AH=A9h
--------N-17A9-------------------------------
INT 17 - Alloy MW386 - CHANGE TEMPORARY SPOOL DRIVE
        AH = A9h
        AL = new spool drive (2=C:,3=D:,etc)
Return: AL = status (see #00642)
Note:   does not remove previous spooling directory since jobs may be pending
SeeAlso: AH=A8h
--------N-17AA-------------------------------
INT 17 - Alloy MW386 v2+ - GET REAL-TIME PRINTER STATUS
        AH = AAh
        AL = mode
            00h NTNX
                DX = NTNX printer number (see #00643)
            01h MW386
                DX = MW386 printer number
Return: AH = instantaneous printer status
            00h printer ready
            01h not ready
            12h off line
            13h out of paper
            14h general device failure
            15h device timeout
            16h bad device number
--------N-17AF-------------------------------
INT 17 - Alloy MW386 - CHECK SPOOLER
        AH = AFh
Return: AX = 55AAh if spooler available
--------c-17C0-------------------------------
INT 17 - PC Magazine PCSpool - GET CONTROL BLOCK ADDRESS
        AH = C0h
        DX = printer port (0-3)
Return: ES:BX -> control block (see #00646)
SeeAlso: AH=C1h

Format of PCSpool control block:
Offset  Size    Description     (Table 00646)
 00h    WORD    printer number
 02h    WORD    address of printer status port
 04h    WORD    number of first record in queue
 06h    WORD    number of last record in queue
 08h    DWORD   characters already printed
 0Ch    DWORD   number of characters remaining
 10h    DWORD   pointer to dequeue buffer
 14h    DWORD   previous count of characters printed
 18h    DWORD   number of clock ticks taken to print them
 1Ch    WORD    offset of next character to output
 1Eh    WORD    offset of next character to print
 20h    WORD    pointer to spooling queue record
 22h    BYTE    current spooling status
 23h    BYTE    current printer status:
                00h OK
                01h not ready
                02h paused with message
                03h paused
                04h initializing
                FEh non-existent port
                FFh not spooled
 24h    BYTE    current control record type
 25h    WORD    observed printer speed
 27h    WORD    characters to print per service
 29h    BYTE    01h if disk write needed
 2Ah    BYTE    01h if queued data should be flushed
 2Bh    BYTE    01h to update cps status
--------c-17C1--------------------------------
INT 17 - PC Magazine PCSpool - BUILD PAUSE CONTROL RECORD
        AH = C1h
        DX = printer port (0-3)
        DS:SI -> ASCIZ string to save for display
Note:   flushes pending writes
SeeAlso: AH=C0h,AH=C2h
--------c-17C2-------------------------------
INT 17 - PC Magazine PCSpool - FLUSH PENDING WRITES
        AH = C2h
        DX = printer port (0-3)
SeeAlso: AH=C3h
--------c-17C3-------------------------------
INT 17 - PC Magazine PCSpool - CANCEL PRINTER QUEUE (FLUSH ALL QUEUED OUTPUT)
        AH = C3h
        DX = printer port (0-3)
SeeAlso: AH=C2h,AH=C7h
--------c-17C4-------------------------------
INT 17 - PC Magazine PCSpool - QUERY SPOOLER ACTIVE
        AH = C4h
Return: DI = B0BFh
        SI = segment
--------c-17C5-------------------------------
INT 17 - PC Magazine PCSpool - JOB SKIP PRINTER QUEUE
        AH = C5h
        DX = printer port (0-3)
Note:   cancels up to the pause record
--------c-17C6-------------------------------
INT 17 - PC Magazine PCSpool - CHECK PRINTER QUEUE STATUS
        AH = C6h
        DX = printer port (0-3)
Return: AX = queue status
           0000h printer not active or at pause
           0001h printer busy
--------c-17C7-------------------------------
INT 17 - PC Magazine PCSpool - CLOSE QUEUE
        AH = C7h
        DX = printer port (0-3)
SeeAlso: AH=C3h
--------P-17CD00-----------------------------
INT 17 - INSET - EXECUTE COMMAND STRING
        AX = CD00h
        DS:DX -> ASCIZ command string (max 80 bytes)
Return: CX = 07C2h (1986d)
Note:   user interface menus pop up after last command, unless that command
        exits INSET
--------P-17CD01-----------------------------
INT 17 - INSET - GET IMAGE SIZE
        AX = CD01h
        DS:DX -> ASCIZ name of image file
Return: AX = height in 1/720th inch
        BX = width in 1/720th inch
        CX = 07C2h (1986d)
--------P-17CD02-----------------------------
INT 17 - INSET - INITIALIZE
        AX = CD02h
Return: CX = 07C2h (1986d)
Note:   all open files are closed and the printer is reset
SeeAlso: AX=CD04h
--------P-17CD03-----------------------------
INT 17 - INSET - EXECUTE INSET MENU WITHIN OVERRIDE MODE
        AX = CD03h
Return: CX = 07C2h (1986d)
--------P-17CD04-----------------------------
INT 17 - INSET - INITIALIZE LINKED MODE
        AX = CD04h
        ES:SI -> FAR routine for linked mode (see #00647)
Return: CX = 07C2h
SeeAlso: AX=CD02h,AX=CD08h

(Table 00647)
Values INSET linked-mode routine is called with:
        AL = function
            00h send character to printer
                BL = character to send
            01h send string to printer
                CX = number of bytes to send
                DS:DX -> buffer containing data
            02h move print head to horizontal starting position of image
Return: AX = status
            0000h success
            0001h failure
--------P-17CD05-----------------------------
INT 17 - INSET - START MERGING IMAGE INTO TEXT
        AX = CD05h
        DS:DX -> ASCIZ name of PIX file
        CX = left margin of text in 1/720th inch
Return: AH = printer type
            00h page-oriented (multiple images may be placed side-by-side)
            01h line-oriented (use AX=CD06h for vertical paper movement)
        CX = 07C2h (1986d)
SeeAlso: AX=CD07h
--------P-17CD06-----------------------------
INT 17 - INSET - GRAPHICS LINE FEED
        AX = CD06h
Return: AH = completion status
            00h image complete
            01h image incomplete
        CX = 07C2h (1986d)
SeeAlso: AX=CD09h
--------P-17CD07-----------------------------
INT 17 - INSET - FLUSH GRAPHICS FROM MERGE BUFFER
        AX = CD07h
Return: CX = 07C2h
SeeAlso: AX=CD05h
--------P-17CD08-----------------------------
INT 17 - INSET - CANCEL LINK MODE
        AX = CD08h
Return: CX = 07C2h
SeeAlso: AX=CD04h
--------P-17CD09-----------------------------
INT 17 - INSET - ALTER TEXT LINE SPACING
        AX = CD09h
        CX = line spacing in 1/720th inch
Return: CX = 07C2h
Note:   not yet implemented, line spacing is currently fixed at 1/6 inch
SeeAlso: AX=CD06h
--------P-17CD0A-----------------------------
INT 17 - INSET - GET SETUP
        AX = CD0Ah
        DS:DX -> buffer for IN.SET data
Return: CX = 07C2h
--------P-17CD0B-----------------------------
INT 17 - INSET - START GETTING SCALED IMAGE
        AX = CD0Bh
        DS:SI -> ASCIZ pathname of .PIX file
        BX = number of bitplanes
        CX = number of rows in output bitmap
        DX = number of columns in output bitmap
Return: AX = status
            0000h OK
            FFFFh error
Note:   image is returned in strips by repeated calls to AX=CD0Ch
--------P-17CD0C-----------------------------
INT 17 - INSET - GET NEXT IMAGE STRIP
        AX = CD0Ch
Return: AX = status
            0000h OK but not complete
            0001h OK and image complete
            FFFFh error
        DS:SI -> buffer (max 4K) for bit map strip
        CX = start row
        DX = number of rows
        BX = offset in bytes between bit planes
Note:   buffer may be overwritten by subsequent calls
SeeAlso: AX=CD0Bh
--------P-17E0-------------------------------
INT 17 - EPP BIOS - INSTALLATION CHECK
        AH = E0h
Return: ??? (AH <> E0h if installed ???)
SeeAlso: AX=0200h"EPP",AH=E1h,AH=E2h
--------P-17E1-------------------------------
INT 17 - EPP BIOS - DISABLE EPP
        AH = E1h
        ???
Return: ???
SeeAlso: AX=0200h"EPP",AH=E0h,AH=E2h
--------P-17E2-------------------------------
INT 17 - EPP BIOS - ENABLE EPP
        AH = E2h
        ???
Return: ???
SeeAlso: AX=0200h"EPP",AH=E0h,AH=E1h
--------P-17F0-------------------------------
INT 17 - NorthNet Jetstream API - INSTALLATION CHECK
        AH = F0h
        DX = printer port (0-3)
Return: AX = 0001h Jetstream present
             else  non-Jetstream port
Note:   NorthNet Jetstream is a high-performance DMA-driven parallel card able
          to drive printers at up to 80000 characters per second
--------P-17F1-------------------------------
INT 17 - NorthNet Jetstream API - PRINT DATA BUFFER
        AH = F1h
        CX = data buffer length
        DX = printer port (0-3)
        DS:SI -> data buffer
Return: AX = status
            0000h printer not ready (see also AH=02h)
            other printing started
SeeAlso: AH=00h,AH=F2h,AH=F3h,AH=F5h
--------P-17F2-------------------------------
INT 17 - NorthNet Jetstream API - GET PRINT PROGRESS STATUS
        AH = F2h
        DX = printer port (0-3)
Return: AX = status
            0000h prior print request finished
            other number of characters left to print
SeeAlso: AH=02h,AH=F1h,AH=F3h
--------P-17F3-------------------------------
INT 17 - NorthNet Jetstream API - ABORT PRINT OPERATION
        AH = F3h
        DX = printer port (0-3)
Return: AX = number of unprinted characters due to abort
SeeAlso: AH=F1h,AH=F4h
--------P-17F4-------------------------------
INT 17 - NorthNet Jetstream API - SET COMPLETION (POST) ADDRESS
        AH = F4h
        DX = printer port (0-3)
        DS:DS -> FAR post address (called with interrupts on)
SeeAlso: AH=F1h,AH=F3h
--------P-17F5-------------------------------
INT 17 - NorthNet Jetstream API - PRINT DATA BUFFER FROM EXTENDED MEMORY
        AH = F5h
        CX = data buffer length
        DX = printer port (0-3)
        DS:SI -> data buffer (32-bit physical address)
Return: AX = status
            0000h printer not ready (see also AH=02h)
            other printing started
SeeAlso: AH=F1h
--------c-17FF--BX0000-----------------------
INT 17 U - PC-MOS/386 v5.01 - PRINT SPOOLER - CLOSE SPOOL FILE
        AH = FFh
        BX = 0000h
        CX = 0000h
        DX = printer port number
Return: AH = printer status (see #00631 at AH=00h)
Program: PC-MOS/386 v5.01 is a multitasking, multiuser MS-DOS 5.0-compatible
          operating system by The Software Link, Inc.
Desc:   close the spool file immediately instead of waiting for the close time
          to elapse
SeeAlso: AH=01h,AH=03h"PC-MOS"
--------B-18---------------------------------
INT 18 - DISKLESS BOOT HOOK (START CASSETTE BASIC)
Desc:   called when there is no bootable disk available to the system
Notes:  only PCs produced by IBM contain BASIC in ROM, so the action is
          unpredictable on compatibles; this interrupt often reboots the
          system, and often has no effect at all
        network cards with their own BIOS can hook this interrupt to allow
          a diskless boot off the network (even when a hard disk is present
          if none of the partitions is marked as the boot partition)
SeeAlso: INT 2F/AX=4A06h,INT 86"NetBIOS"
--------J-1800-------------------------------
INT 18 - NEC PC-9800 series - KEYBOARD - GET KEYSTROKE
        AH = 00h
Return: AX = keystroke
SeeAlso: AH=01h,AH=02h,INT 16/AH=00h
--------J-1801-------------------------------
INT 18 - NEC PC-9800 series - KEYBOARD - CHECK FOR KEYSTROKE
        AH = 01h
Return: BH = status
            00h no keystrokes available
            01h keystroke available
                AX = keystroke
SeeAlso: AH=00h,AH=02h,INT 16/AH=01h
--------J-1802-------------------------------
INT 18 - NEC PC-9800 series - KEYBOARD - GET SHIFT STATUS
        AH = 02h
Return: AL = shift flags
SeeAlso: AH=00h,AH=02h,AH=03h,AH=04h,INT 16/AH=02h
--------J-1803-------------------------------
INT 18 - NEC PC-9800 series - KEYBOARD - INITIALIZE
        AH = 03h
        ???
Return: ???
SeeAlso: AH=00h,AH=04h
--------J-1804-------------------------------
INT 18 - NEC PC-9800 series - KEYBOARD - KEY PRESSED
        AH = 04h
        ???
Return: ???
Note:   details are not available at this time
SeeAlso: AH=00h,AH=02h,INT 16/AH=00h,INT 16/AH=01h,INT 16/AH=02h
--------J-18---------------------------------
INT 18 - NEC PC-9800 series - VIDEO
        AH = function
            0Ah set video mode
            0Bh get video mode
            0Ch start text screen display
            0Dh end text screen display
            0Eh set single display area
            0Fh set multiple display area
            10h set cursor shape
            11h display cursor
            12h terminate cursor
            13h set cursor position
            14h read font patter
            16h initialize text video RAM
            1Ah define user character
            others
        ???
Return: ???
Notes:  details are not available at this time
        text video RAM is located at segments A000h (characters) and A200h
          (attributes), graphics video RAM at segment C000h

Bitfields for NEC PC-9800 series video attributes:
Bit(s)  Description     (Table 00648)
 0      disable drawing character
 1      blinking
 2      reverse video
 3      underline
 4      vertical line
 7-5    color
        (0=black, 1=blue, 2=red, 3=purple, 4=green, 5=cyan, 6=yellow, 7=white)
--------J-180E-------------------------------
INT 18 - NEC PC-9800 series - SET SINGLE DISPLAY AREA
        AH = 0Eh
        DX = offset of first byte to display???
Return: ???
SeeAlso: AH=1Bh,MEM 0050h:0001h
--------J-181B-------------------------------
INT 18 - NEC PC-9800 series - SET DISPLAY MODE
        AH = 1Bh
        AL = ??? (00h for text mode)
Return: ???
--------r-185350BX4849-----------------------
INT 18 - SPHINX C-- - WB.COM - API
        AX = 5350h ('SP')
        BX = 4849h ('HI')
        CX = 4E58h ('NX')
        DH = function
            01h set ???
                DL = ???
            02h get ???
                Return: DL = ???
            03h get ???
                Return: ES:DI -> ??? data buffer
            06h ???
Return: AX = 7370h ('sp') if installed
        BX = 6869h ('hi') if installed
        CX = 6E78h ('nx') if installed
Program: SPHINX C-- is a shareware compiler by Peter Cellik for a language
          which is a cross between C and assembler; WB.COM is the driver which
          launches the WorkBench
--------s-186900-----------------------------
INT 18 - Gravis Ultra Sound YEA_GUS.EXE - GET STATUS
        AX = 6900h
Return: AX = amount of DRAM on card or 0000h if GUS not available
Program: YEA_GUS is a driver for the Graphics Ultra Sound which hooks INT 18h
          and then shells out the the program requiring its services
SeeAlso: AX=6901h,AX=690Ah,AX=690Bh
--------s-186901-----------------------------
INT 18 - Gravis Ultra Sound YEA_GUS.EXE - RESET
        AX = 6901h
        BX = number of active voices (14-32)
Return: nothing
SeeAlso: AX=6900h
--------s-186902-----------------------------
INT 18 - Gravis Ultra Sound YEA_GUS.EXE - SET VOLUME FOR SPECIFIC VOICE
        AX = 6902h
        BX = voice number (00h-1Fh)
        CX = linear volume (0000h-01FFh)
Return: nothing
SeeAlso: AX=6900h,AX=6903h,AX=6904h,AX=6909h,AX=690Ah
--------s-186903-----------------------------
INT 18 - Gravis Ultra Sound YEA_GUS.EXE - SET FREQUENCY FOR VOICE
        AX = 6903h
        BX = voice number (00h-1Fh)
        CX = frequency in Hz (0-44100)
Return: nothing
SeeAlso: AX=6902h,AX=6904h
--------s-186904-----------------------------
INT 18 - Gravis Ultra Sound YEA_GUS.EXE - SET LEFT/RIGHT BALANCE
        AX = 6904h
        BX = voice number (00h-1Fh)
        CX = balance (0 = left, 7 = even, 15 = right)
Return: nothing
SeeAlso: AX=6902h,AX=6903h
--------s-186905-----------------------------
INT 18 - Gravis Ultra Sound YEA_GUS.EXE - PLAY MUSIC
        AX = 6905h
        BL = voice number
        BH = sample type (0 = 8-bit, 1 = 16-bit)
        CL = looping type (0 = none, 1 = forward, 2 = back and forth)
        CH:DI = 20-bit starting address for voice data
        DL:SI = 20-bit address for loop start
        DH:BP = 20-bit address for loop end
SeeAlso: AX=6903h,AX=6906h,AX=690Bh
--------s-186906-----------------------------
INT 18 - Gravis Ultra Sound YEA_GUS.EXE - LOAD SOUND DATA
        AX = 6906h
        BL = data format (1 = twos-complement, 0 = not)
        BH = sample type (0 = 8-bit, 1 = 16-bit)
        CX = number of bytes to send
        ES:SI -> buffer containing data
        DL:DI = 20-bit address of GUS DRAM at which to load sound data
SeeAlso: AX=6900h,AX=6905h,AX=690Ch
--------s-186907-----------------------------
INT 18 - Gravis Ultra Sound YEA_GUS.EXE - STOP VOICE
        AX = 6907h
        BX = voice number (00h-1Fh)
Return: nothing
SeeAlso: AX=6908h,AX=690Dh
--------s-186908-----------------------------
INT 18 - Gravis Ultra Sound YEA_GUS.EXE - SET VOICE END
        AX = 6908h
        BX = voice number (00h-1Fh)
        CL:DX = 20-bit ending address
Return: nothing
SeeAlso: AX=690Bh
--------s-186909-----------------------------
INT 18 - Gravis Ultra Sound YEA_GUS.EXE - RAMP VOLUME
        AX = 6909h
        BL = voice number (00h-1Fh)
        BH = looping type (0 = none, 1 = forward, 2 = back and forth)
        CX = starting volume
        DX = ending volume
        DI:SI = time
Return: nothing
SeeAlso: AX=6902h,AX=690Ah
--------s-18690A-----------------------------
INT 18 - Gravis Ultra Sound YEA_GUS.EXE - GET VOLUME
        AX = 690Ah
        BX = voice number (00h-1Fh)
Return: AX = current non-linear volume for voice
SeeAlso: AX=6902h,AX=6909h
--------s-18690B-----------------------------
INT 18 - Gravis Ultra Sound YEA_GUS.EXE - GET POSITION
        AX = 690Bh
        BX = voice number
Return: BX:AX = 20-bit address at which voice is playing
SeeAlso: AX=6900h,AX=6905h,AX=6908h
--------s-18690C-----------------------------
INT 18 - Gravis Ultra Sound YEA_GUS.EXE - SAVE SOUND DATA
        AX = 690Ch
        BL = data format (1 = twos-complement, 0 = not)
        BH = sample type (0 = 8-bit, 1 = 16-bit)
        CX = number of bytes to get
        ES:SI -> buffer for retrieved data
        DL:DI = 20-bit address in GUS DRAM from which to read voice data
Return: nothing
SeeAlso: AX=6906h
--------s-18690D-----------------------------
INT 18 - Gravis Ultra Sound YEA_GUS.EXE - RESTART VOICE
        AX = 690Dh
        BX = voice
        CX = sample type (0 = 8-bit, 1 = 16-bit)
        DX = looping type (0 = none, 1 = forward, 2 = back and forth)
Return: CX = balance value
SeeAlso: AX=6907h,AX=6908h
--------s-188000-----------------------------
INT 18 - Gravis Ultra Sound EURO_MOD.EXE - INITIALIZE
        AX = 8000h
Program: EURO_MOD is a .MOD file player for the Gravis Ultra Sound which hooks
          INT 18h and then shells out to the program requiring its services
SeeAlso: AX=8001h,AX=8004h
--------s-188001-----------------------------
INT 18 - Gravis Ultra Sound EURO_MOD.EXE - LOAD .MOD FILE
        AX = 8001h
        BX:CX -> ASCIZ filename
SeeAlso: AX=8000h,AX=8002h
--------s-188002-----------------------------
INT 18 - Gravis Ultra Sound EURO_MOD.EXE - PLAY .MOD FILE
        AX = 8002h
SeeAlso: AX=8002h,AX=8003h
--------s-188003-----------------------------
INT 18 - Gravis Ultra Sound EURO_MOD.EXE - STOP PLAYING
        AX = 8003h
--------s-188004-----------------------------
INT 18 - Gravis Ultra Sound EURO_MOD.EXE - SHUTDOWN
        AX = 8004h
SeeAlso: AX=8000h,AX=8003h
--------B-19---------------------------------
INT 19 - SYSTEM - BOOTSTRAP LOADER
Desc:   This interrupt reboots the system without clearing memory or restoring
          interrupt vectors.  Because interrupt vectors are preserved, this
          interrupt usually causes a system hang if any TSRs have hooked
          vectors from 00h through 1Ch, particularly INT 08.
Notes:  Usually, the BIOS will try to read sector 1, head 0, track 0 from drive
          A: to 0000h:7C00h.  If this fails, and a hard disk is installed, the
          BIOS will read sector 1, head 0, track 0 of the first hard disk.
          This sector should contain a master bootstrap loader and a partition
          table (see #00650).  After loading the master boot sector at
          0000h:7C00h, the master bootstrap loader is given control
          (see #00653). It will scan the partition table for an active
          partition, and will then load the operating system's bootstrap
          loader (contained in the first sector of the active partition) and
          give it control.
        true IBM PCs and most clones issue an INT 18 if neither floppy nor hard
          disk have a valid boot sector
        to accomplish a warm boot equivalent to Ctrl-Alt-Del, store 1234h in
          0040h:0072h and jump to FFFFh:0000h.  For a cold boot equivalent to
          a reset, store 0000h at 0040h:0072h before jumping.
        VDISK.SYS hooks this interrupt to allow applications to find out how
          much extended memory has been used by VDISKs (see #00649).  DOS 3.3+
          PRINT hooks INT 19 but does not set up a correct VDISK header block
          at the beginning of its INT 19 handler segment, thus causing some
          programs to overwrite extended memory which is already in use.
        the default handler is at F000h:E6F2h for 100% compatible BIOSes
        MS-DOS 3.2+ hangs on booting (even from floppy) if the hard disk
          contains extended partitions which point at each other in a loop,
          since it will never find the end of the linked list of extended
          partitions
        under Windows Real and Enhanced modes, calling INT 19 will hang the
          system in the same was as under bare DOS; under Windows Standard
          mode, INT 19 will successfully perform a cold reboot as it appears
          to have been redirected to a MOV AL,0FEh/OUT 64h,AL sequence
BUG:    when loading the remainder of the DOS system files fails, various
          versions of IBMBIO.COM/IO.SYS incorrectly restore INT 1E before
          calling INT 19, assuming that the boot sector had stored the
          contents of INT 1E at DS:SI instead of on the stack as it actually
          does
SeeAlso: INT 14/AH=17h,INT 18"BOOT HOOK",INT 49"Tandy 2000",INT 5B"PC Cluster"
SeeAlso: MEM 0040h:0067h,MEM F000h:FFF0h,CMOS 0Fh

Format of VDISK header block (at beginning of INT 19 handler's segment):
Offset  Size    Description     (Table 00649)
 00h 18 BYTEs   n/a (for VDISK.SYS, the device driver header)
 12h 11 BYTEs   signature string "VDISK  Vn.m" for VDISK.SYS version n.m
 1Dh 15 BYTEs   n/a
 2Ch  3 BYTEs   linear address of first byte of available extended memory

Format of hard disk master boot sector:
Offset  Size    Description     (Table 00650)
 00h 446 BYTEs  Master bootstrap loader code
1BEh 16 BYTEs   partition record for partition 1 (see #00651)
1CEh 16 BYTEs   partition record for partition 2
1DEh 16 BYTEs   partition record for partition 3
1EEh 16 BYTEs   partition record for partition 4
1FEh    WORD    signature, AA55h indicates valid boot block

Format of partition record:
Offset  Size    Description     (Table 00651)
 00h    BYTE    boot indicator (80h = active partition)
 01h    BYTE    partition start head
 02h    BYTE    partition start sector (bits 0-5)
 03h    BYTE    partition start track (bits 8,9 in bits 6,7 of sector)
 04h    BYTE    operating system indicator (see #00652)
 05h    BYTE    partition end head
 06h    BYTE    partition end sector (bits 0-5)
 07h    BYTE    partition end track (bits 8,9 in bits 6,7 of sector)
 08h    DWORD   sectors preceding partition
 0Ch    DWORD   length of partition in sectors
SeeAlso: #00650

(Table 00652)
Values for operating system indicator:
 00h    empty partition-table entry
 01h    DOS 12-bit FAT
 02h    XENIX root file system
 03h    XENIX /usr file system (obsolete)
 04h    DOS 16-bit FAT (up to 32M)
 05h    DOS 3.3+ extended partition
 06h    DOS 3.31+ Large File System (16-bit FAT, over 32M)
 07h    QNX
 07h    OS/2 HPFS
 07h    Windows NT NTFS
 07h    Advanced Unix
 07h    see partition boot record; could be any of the above or others
 08h    OS/2 (v1.0-1.3 only)
 08h    AIX bootable partition, SplitDrive
 08h    Commodore DOS
 08h    DELL partition spanning multiple drives
 09h    AIX data partition
 09h    Coherent filesystem
 0Ah    OS/2 Boot Manager
 0Ah    OPUS
 0Ah    Coherent swap partition
 0Bh    Windows95 with 32-bit FAT
 0Ch    Windows95 with 32-bit FAT (using LBA-mode INT 13 extensions)
 0Eh    logical-block-addressable VFAT (same as 06h but using LBA-mode INT 13)
 0Fh    logical-block-addressable VFAT (same as 05h but using LBA-mode INT 13)
 10h    OPUS
 11h    OS/2 Boot Manager hidden 12-bit FAT partition
 12h    Compaq Diagnostics partition
 14h    (resulted from using Novell DOS 7.0 FDISK to delete Linux Native part)
 14h    OS/2 Boot Manager hidden sub-32M 16-bit FAT partition
 16h    OS/2 Boot Manager hidden over-32M 16-bit FAT partition
 17h    OS/2 Boot Manager hidden HPFS partition
 17h    hidden NTFS partition
 18h    AST special Windows swap file ("Zero-Volt Suspend" partition)
 19h    Willowtech Photon coS
 1Bh    hidden Windows95 FAT32 partition
 1Ch    hidden Windows95 FAT32 partition (using LBA-mode INT 13 extensions)
 1Eh    hidden LBA VFAT partition
 20h    Willowsoft Overture File System (OFS1)
 21h    officially listed as reserved
 21h    FSo2
 23h    officially listed as reserved
 24h    NEC MS-DOS 3.x
 26h    officially listed as reserved
 31h    officially listed as reserved
 33h    officially listed as reserved
 34h    officially listed as reserved
 36h    officially listed as reserved
 38h    Theos
 3Ch    PowerQuest PartitionMagic recovery partition
 40h    VENIX 80286
 41h    Personal RISC Boot
 41h    PowerPC boot partition
 42h    SFS (Secure File System) by Peter Gutmann
 45h    EUMEL/Elan
 46h    EUMEL/Elan
 47h    EUMEL/Elan
 48h    EUMEL/Elan
 4Fh    Oberon boot/data partition
 50h    OnTrack Disk Manager, read-only partition
 51h    OnTrack Disk Manager, read/write partition
 51h    NOVELL
 52h    CP/M
 52h    Microport System V/386
 53h    OnTrack Disk Manager, write-only partition???
 54h    OnTrack Disk Manager (DDO)
 55h    EZ-Drive (see also INT 13/AH=FFh"EZ-Drive")
 56h    GoldenBow VFeature
 5Ch    Priam EDISK
 61h    SpeedStor
 63h    Unix SysV/386, 386/ix
 63h    Mach, MtXinu BSD 4.3 on Mach
 63h    GNU HURD
 64h    Novell NetWare 286
 64h    SpeedStore
 65h    Novell NetWare (3.11)
 67h    Novell
 68h    Novell
 69h    Novell
 70h    DiskSecure Multi-Boot
 71h    officially listed as reserved
 73h    officially listed as reserved
 74h    officially listed as reserved
 75h    PC/IX
 76h    officially listed as reserved
 7Eh    F.I.X.
 80h    Minix v1.1 - 1.4a
 81h    Minix v1.4b+
 81h    Linux
 81h    Mitac Advanced Disk Manager
 82h    Linux Swap partition
 82h    Prime
 82h    Solaris (Unix)
 83h    Linux native file system (ext2fs/xiafs)
 84h    OS/2-renumbered type 04h partition (related to hiding DOS C: drive)
 85h    Linux EXT
 86h    FAT16 volume/stripe set (Windows NT)
 87h    HPFS Fault-Tolerant mirrored partition
 87h    NTFS volume/stripe set
 93h    Amoeba file system
 94h    Amoeba bad block table
 99h    Mylex EISA SCSI
 A0h    Phoenix NoteBIOS Power Management "Save-to-Disk" partition
 A1h    officially listed as reserved
 A3h    officially listed as reserved
 A4h    officially listed as reserved
 A5h    FreeBSD, BSD/386
 A6h    OpenBSD
 A9h    NetBSD (http://www.netbsd.org/)
 B1h    officially listed as reserved
 B3h    officially listed as reserved
 B4h    officially listed as reserved
 B6h    officially listed as reserved
 B7h    BSDI file system (secondarily swap)
 B8h    BSDI swap partition (secondarily file system)
 BEh    Solaris boot partition
 C0h    DR-DOS/Novell DOS secured partition
 C0h    CTOS
 C1h    DR DOS 6.0 LOGIN.EXE-secured 12-bit FAT partition
 C4h    DR DOS 6.0 LOGIN.EXE-secured 16-bit FAT partition
 C6h    DR DOS 6.0 LOGIN.EXE-secured Huge partition
 C6h    corrupted FAT16 volume/stripe set (Windows NT)
 C7h    Syrinx Boot
 C7h    corrupted NTFS volume/stripe set
 CBh    Reserved for DR-DOS secured FAT32
 CCh    Reserved for DR-DOS secured FAT32 (LBA)
 CEh    Reserved for DR-DOS secured FAT16 (LBA)
 D0h    Multiuser DOS secured FAT12
 D1h    Old Multiuser DOS secured FAT12
 D4h    Old Multiuser DOS secured FAT16 (<= 32M)
 D5h    Old Multiuser DOS secured extended partition
 D6h    Old Multiuser DOS secured FAT16 (> 32M)
 D8h    CP/M-86
 DBh    CP/M, Concurrent CP/M, Concurrent DOS
 DBh    CTOS (Convergent Technologies OS)
 E1h    SpeedStor 12-bit FAT extended partition
 E2h    DOS read-only (Florian Painke's XFDISK 1.0.4)
 E3h    DOS read-only
 E3h    Storage Dimensions
 E4h    SpeedStor 16-bit FAT extended partition
 E5h    officially listed as reserved
 E6h    officially listed as reserved
 EBh    BeOS BFS (BFS1)
 F1h    Storage Dimensions
 F2h    DOS 3.3+ secondary partition
 F3h    officially listed as reserved
 F4h    SpeedStor
 F4h    Storage Dimensions
 F5h    Prologue
 F6h    officially listed as reserved
 FEh    LANstep
 FEh    IBM PS/2 IML (Initial Microcode Load) partition
 FFh    Xenix bad block table
Note:   for partition type 07h, one should inspect the partition boot record
          for the actual file system type
SeeAlso: #00651

(Table 00653)
Values Bootstrap loader is called with (IBM BIOS):
        CS:IP = 0000h:7C00h
        DH = access
            bits 7-6,4-0: don't care
            bit 5: =0 device supported by INT 13
        DL = boot drive
            00h first floppy
            80h first hard disk
--------B-1A00-------------------------------
INT 1A - TIME - GET SYSTEM TIME
        AH = 00h
Return: CX:DX = number of clock ticks since midnight
        AL = midnight flag, nonzero if midnight passed since time last read
Notes:  there are approximately 18.2 clock ticks per second, 1800B0h per 24 hrs
          (except on Tandy 2000, where the clock runs at 20 ticks per second)
        IBM and many clone BIOSes set the flag for AL rather than incrementing
          it, leading to loss of a day if two consecutive midnights pass
          without a request for the time (e.g. if the system is on but idle)
        since the midnight flag is cleared, if an application calls this
          function after midnight before DOS does, DOS will not receive the
          midnight flag and will fail to advance the date
SeeAlso: AH=01h,AH=02h,INT 21/AH=2Ch,INT 55"Tandy 2000",INT 4E/AH=02h"TI"
SeeAlso: INT 62/AX=0099h,MEM 0040h:006Ch,MEM 0040h:0070h
--------B-1A01-------------------------------
INT 1A - TIME - SET SYSTEM TIME
        AH = 01h
        CX:DX = number of clock ticks since midnight
Return: nothing
Notes:  there are approximately 18.2 clock ticks per second, 1800B0h per 24 hrs
          (except on Tandy 2000, where the clock runs at 20 ticks per second)
        this call resets the midnight-passed flag
SeeAlso: AH=00h,AH=03h,INT 21/AH=2Dh
--------B-1A02-------------------------------
INT 1A - TIME - GET REAL-TIME CLOCK TIME (AT,XT286,PS)
        AH = 02h
Return: CF clear if successful
            CH = hour (BCD)
            CL = minutes (BCD)
            DH = seconds (BCD)
            DL = daylight savings flag (00h standard time, 01h daylight time)
        CF set on error (i.e. clock not running or in middle of update)
Note:   this function is also supported by the Sperry PC, which predates the
          IBM AT; the data is returned in binary rather than BCD on the Sperry,
          and DL is always 00h
SeeAlso: AH=00h,AH=03h,AH=04h,INT 21/AH=2Ch
--------b-1A02-------------------------------
INT 1A - Tandy 2000 - TIME - GET DATE AND TIME
        AH = 02h
Return: BX = number of days since January 1, 1980
        CH = hours
        CL = minutes
        DH = seconds
        DL = hundredths
SeeAlso: AH=03h"Tandy 2000",INT 55"Tandy 2000"
--------B-1A03-------------------------------
INT 1A - TIME - SET REAL-TIME CLOCK TIME (AT,XT286,PS)
        AH = 03h
        CH = hour (BCD)
        CL = minutes (BCD)
        DH = seconds (BCD)
        DL = daylight savings flag (00h standard time, 01h daylight time)
Return: nothing
Note:   this function is also supported by the Sperry PC, which predates the
          IBM AT; the data is specified in binary rather than BCD on the
          Sperry, and the value of DL is ignored
SeeAlso: AH=01h,AH=03h,AH=05h,INT 21/AH=2Dh,INT 4B/AH=01h
--------b-1A03-------------------------------
INT 1A - Tandy 2000 - TIME - SET DATE AND TIME
        AH = 03h
        BX = number of days since January 1, 1980
        CH = hours
        CL = minutes
        DH = seconds
        DL = hundredths
Return: nothing
SeeAlso: AH=02h"Tandy 2000",INT 55"Tandy 2000"
--------B-1A04-------------------------------
INT 1A - TIME - GET REAL-TIME CLOCK DATE (AT,XT286,PS)
        AH = 04h
Return: CF clear if successful
            CH = century (BCD)
            CL = year (BCD)
            DH = month (BCD)
            DL = day (BCD)
        CF set on error
SeeAlso: AH=02h,AH=04h"Sperry",AH=05h,INT 21/AH=2Ah,INT 4B/AH=02h"TI"
--------b-1A04-------------------------------
INT 1A - Sperry PC - GET REAL-TIME CLOCK DATE
        AH = 04h
Return: CF clear if successful
            CL = year-1980
            DH = month (binary) (01h-0Ch)
            DL = day (binary) (01h-1Fh)
        CF set on error
SeeAlso: AH=02h,AH=04h,AH=05h"Sperry",INT 21/AH=2Ah,INT 4B/AH=02h"TI"
--------B-1A05-------------------------------
INT 1A - TIME - SET REAL-TIME CLOCK DATE (AT,XT286,PS)
        AH = 05h
        CH = century (BCD)
        CL = year (BCD)
        DH = month (BCD)
        DL = day (BCD)
Return: nothing
SeeAlso: AH=04h,INT 21/AH=2Bh"DATE",INT 4B/AH=00h"TI"
--------b-1A05-------------------------------
INT 1A - Sperry PC - SET REAL-TIME CLOCK DATE
        AH = 05h
        CL = year-1980
        CH = 00h (???)
        DH = month (binary) (01h-0Ch)
        DL = day (binary) (01h-1Fh)
Return: nothing
SeeAlso: AH=02h,AH=04h"Sperry",AH=05h,INT 21/AH=2Bh"DATE"
--------B-1A06-------------------------------
INT 1A - TIME - SET ALARM (AT,XT286,PS)
        AH = 06h
        CH = hour (BCD)
        CL = minutes (BCD)
        DH = seconds (BCD)
Return: CF set on error (alarm already set or clock stopped for update)
        CF clear if successful
Notes:  the alarm occurs every 24 hours until turned off, invoking INT 4A each
          time
        the BIOS does not check for invalid values for the time, so the CMOS
          clock chip's "don't care" setting (any values between C0h and FFh)
          may be used for any or all three parts.  For example, to create an
          alarm once a minute, every minute, call with CH=FFh, CL=FFh, and
          DH=00h.
SeeAlso: AH=07h,AH=0Ch,INT 4A"SYSTEM"
--------B-1A07-------------------------------
INT 1A - TIME - CANCEL ALARM (AT,XT286,PS)
        AH = 07h
Return: alarm disabled
Note:   does not disable the real-time clock's IRQ
SeeAlso: AH=06h,AH=0Dh,INT 70
--------B-1A08-------------------------------
INT 1A - TIME - SET RTC ACTIVATED POWER ON MODE (CONVERTIBLE)
        AH = 08h
        CH = hours in BCD
        CL = minutes in BCD
        DH = seconds in BCD
SeeAlso: AH=09h
--------B-1A09-------------------------------
INT 1A - TIME - READ RTC ALARM TIME AND STATUS (CONV,PS30)
        AH = 09h
Return: CH = hours in BCD
        CL = minutes in BCD
        DH = seconds in BCD
        DL = alarm status
            00h alarm not enabled
            01h alarm enabled but will not power up system
            02h alarm will power up system
SeeAlso: AH=08h
--------B-1A0A-------------------------------
INT 1A - TIME - READ SYSTEM-TIMER DAY COUNTER (XT2,PS)
        AH = 0Ah
Return: CF set on error
        CF clear if successful
            CX = count of days since Jan 1,1980
SeeAlso: AH=04h,AH=0Bh
--------B-1A0B-------------------------------
INT 1A - TIME - SET SYSTEM-TIMER DAY COUNTER (XT2,PS)
        AH = 0Bh
        CX = count of days since Jan 1,1980
Return: CF set on error
        CF clear if successful
SeeAlso: AH=05h,AH=0Ah
--------B-1A0C-------------------------------
INT 1A - TIME - SET RTC DATE/TIME ACTIVATED POWER-ON MODE (IBM)
        AH = 0Ch
        CH = hours (BCD)
        CL = minutes (BCD)
        DH = seconds (BCD)
        DL = day of month (BCD)
Return: CF clear if successful
        CF set on error (alarm already set or clock nonfunctional)
Desc:   set an automatic power-on for a given time in the future
Note:   IBM classifies this function as optional
SeeAlso: AH=06h,AH=0Dh,AH=0Eh,INT 4A
--------B-1A0D-------------------------------
INT 1A - TIME - RESET RTC DATE/TIME ACTIVATED POWER-ON MODE (IBM)
        AH = 0Dh
Return: CF clear if successful
        CF set on error
Desc:   cancel a previously-set power-on alarm
Note:   IBM classifies this function as optional
SeeAlso: AH=07h,AH=0Ch,AH=0Eh
--------B-1A0E-------------------------------
INT 1A - TIME - GET RTC DATE/TIME ALARM AND STATUS (IBM)
        AH = 0Eh
Return: CF clear if successful
            BH = alarm status
                00h disabled
                01h enabled but will not power-up system
                02h enabled, system will power-up on activation
            CH = alarm time, hours (BCD)
            CL = alarm time, minutes (BCD)
            DH = seconds (BCD)
            DL = day of month (BCD)
        CF set on error
SeeAlso: AH=0Ch,AH=0Dh,AH=0Fh
--------B-1A0F-------------------------------
INT 1A - TIME - INITIALIZE REAL-TIME CLOCK
        AH = 0Fh
        AL = reserved (0)
Return: CF clear if successful
        CF set on error
SeeAlso: AH=0Ch,AH=0Dh,AH=0Eh
--------J-1A10-------------------------------
INT 1A - NEC PC-9800 series - PRINTER - INITIALIZE
        AH = 10h
        ???
Return: ???
SeeAlso: AH=11h,AH=12h,INT 17/AH=01h
--------J-1A1000-----------------------------
INT 1A - NEC PC-9800 series - INSTALLATION CHECK
        AX = 1000h
Return: AX <> 1000h if NEC
--------J-1A11-------------------------------
INT 1A - NEC PC-9800 series - PRINTER - OUTPUT CHARACTER
        AH = 11h
        ???
Return: ???
SeeAlso: AH=10h,AH=12h,INT 17/AH=00h
--------J-1A12-------------------------------
INT 1A - NEC PC-9800 series - PRINTER - SENSE STATUS
        AH = 12h
        ???
Return: ???
SeeAlso: AH=10h,AH=11h,INT 17/AH=02h
--------A-1A3601-----------------------------
INT 1A - WORD PERFECT v5.0 Third Party Interface - INSTALLATION CHECK
        AX = 3601h
Return: DS:SI = routine to monitor keyboard input, immediately preceded by the
                ASCIZ string "WPCORP\0"
Notes:  WordPerfect 5.0 will call this interrupt at start up to determine if a
          third party product wants to interface with it.  The third party
          product must intercept this interrupt and return the address of a
          keyboard monitor routine.
        Before checking for keyboard input, and after every key entered by the
          user, Word Perfect will call the routine whose address was provided
          in DS:SI with the following parameters:
                Entry:  AX = key code or 0
                        BX = WordPerfect state flag
                Exit:   AX = 0 or key code
                        BX = 0 or segment address of buffer with key codes
        See the "WordPerfect 5.0 Developer's Toolkit" for further information.
SeeAlso: INT 16/AX=5500h
--------N-1A6108-----------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_SENDWITHREPLY" - SEND MSG AND GET REPLY
        AX = 6108h
        STACK:  WORD    conversation ID (0000h-0009h)
                DWORD   pointer to message buffer
                WORD    length of message
                DWORD   pointer to reply buffer
                WORD    length of reply buffer
                WORD    0000h (use default "Cparams" structure)
Return: AX = status (see #00654)
        STACK unchanged
Program: SNAP.EXE is a TSR written by IBM and Carnegie Mellon University
          which implements the Simple Network Application Protocol
SeeAlso: AX=6205h

(Table 00654)
Values for SNAP.EXE status:
 0000h  successful
 F830h  "SNAP_ABORTED"
 FC04h  "SNAP_SERVERDIED"
 FC05h  "SNAP_RESEND"
 FC06h  "SNAP_SELECTFAILED"
 FC07h  "SNAP_WRONGVERSION"
 FC08h  "SNAP_INVALIDACK"
 FC09h  "SNAP_TIMEOUT"
 FC0Ah  "SNAP_SERVERREJECT"
 FC0Bh  "SNAP_NOREPLYDUE"
 FC0Ch  "SNAP_NOAUTHENTICATE"/"SNAP_GUARDIAN_ERROR"
 FC0Dh  "SNAP_NOINIT"
 FC0Eh  "SNAP_SOCKETERROR"
 FC0Fh  "SNAP_BUFFERLIMIT"
 FC10h  "SNAP_INVALIDCID"
 FC11h  "SNAP_INVALIDOP"
 FC12h  "SNAP_XMITFAIL"
 FC13h  "SNAP_NOMORERETRIES"
 FC14h  "SNAP_BADPARMS"
 FC15h  "SNAP_NOMEMORY"
 FC16h  "SNAP_NOMORECONVS"
 FFFFh  failed (invalid function/parameter)
--------N-1A6205-----------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_SENDNOREPLY" - SEND MSG, DON'T AWAIT REPLY
        AX = 6205h
        STACK:  WORD    conversation ID (0000h-0009h)
                DWORD   pointer to message
                WORD    length of message
                WORD    0000h (use default "Cparms" structure)
Return: AX = status (see #00654)
        STACK unchanged
SeeAlso: AX=6108h
--------N-1A6308-----------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_BEGINCONV" - BEGIN CONVERSATION
        AX = 6308h
        STACK:  WORD    offset of ASCIZ "guardian"
                WORD    offset of ASCIZ hostname
                WORD    offset of ASCIZ server name
                WORD    offset of ASCIZ userid
                WORD    offset of ASCIZ password
                WORD    offset of password length
                WORD    offset of password type
                WORD    offset of "Cparms" structure (see #00655)
Return: ???
        STACK unchanged
Note:   all stacked offsets are within the SNAP data segment (use AX=6A01h
          to allocate a buffer)
SeeAlso: AX=6405h,AX=7202h

Format of SNAP.EXE Cparms structure:
Offset  Size    Description     (Table 00655)
 00h    WORD    retry delay in seconds
 02h    WORD    timeout delay in seconds
 04h    WORD    maximum buffer size
 06h    WORD    encryption level
--------N-1A6405-----------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_ENDCONV" - END CONVERSATION
        AX = 6405h
        STACK:  WORD    conversation ID (0000h-0009h)
                DWORD   pointer to message buffer
                WORD    length of message
                WORD    0000h (use default "Cparms" structure)
Return: AX = status (see #00654)
        STACK unchanged
Program: SNAP.EXE is a TSR written by IBM and Carnegie Mellon University
          which implements the Simple Network Application Protocol
SeeAlso: AX=6308h
--------N-1A6900-----------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_DATASEG" - GET RESIDENT DATA SEGMENT
        AX = 6900h
Return: AX = value used for DS by resident code
SeeAlso: AX=6A01h,AX=6F01h
--------N-1A6A01-----------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_ALLOC" - ALLOCATE BUFFER IN SNAP DATA SEGMENT
        AX = 6A01h
        STACK:  WORD    number of bytes to allocate
Return: AX = offset of allocated buffer or 0000h if out of memory
        STACK unchanged
Program: SNAP.EXE is a TSR written by IBM and Carnegie Mellon University
          which implements the Simple Network Application Protocol
SeeAlso: AX=6B01h
--------N-1A6B01-----------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_FREE" - DEALLOCATE BUFFER IN SNAP DATA SEGMENT
        AX = 6B01h
        STACK:  WORD    offset within SNAP data segment of previously allocated
                        buffer
Return: STACK unchanged
Note:   this call is a NOP if the specified offset is 0000h
SeeAlso: AX=6A01h
--------N-1A6C04-----------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_COPYTO" - COPY DATA TO RESIDENT SNAP PACKAGE
        AX = 6C04h
        STACK:  WORD    offset within SNAP data segment of dest (nonzero)
                WORD    segment of source buffer
                WORD    offset of source buffer
                WORD    number of bytes to copy
Return: AX = offset of byte after last one copied to destination
        STACK unchanged
Program: SNAP.EXE is a TSR written by IBM and Carnegie Mellon University
          which implements the Simple Network Application Protocol
SeeAlso: AX=6D04h
--------N-1A6D04-----------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_COPYFROM" - COPY DATA FROM RESIDENT SNAP PACKAGE
        AX = 6D04h
        STACK:  WORD    offset within SNAP data segment of source buffer
                WORD    segment of destination buffer
                WORD    offset of destination buffer
                WORD    number of bytes to copy
Return: AX = offset of byte after last one copied from source
        buffer filled
        STACK unchanged
SeeAlso: AX=6C04h
--------N-1A6E01-----------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_SETDEBUG" - SET ???
        AX = 6E01h
        STACK:  WORD    new value for ???
Return: AX = old value of ???
        STACK unchanged
Program: SNAP.EXE is a TSR written by IBM and Carnegie Mellon University
          which implements the Simple Network Application Protocol
--------N-1A6F01-----------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_CHKINSTALL" - INSTALLATION CHECK
        AX = 6F01h
        STACK: WORD 0000h
Return: AX = status
            0000h SNAP is resident
            other SNAP not present
        STACK unchanged
Program: SNAP.EXE is a TSR written by IBM and Carnegie Mellon University
          which implements the Simple Network Application Protocol, and is
          required by PCVENUS (a network shell).  The combination of SNAP and
          PCVENUS allows the use of the Andrew File System as one or more
          networked drives.
SeeAlso: AX=6900h,AX=7400h
--------N-1A7002-----------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_SETANCHOR"
        AX = 7002h
        STACK:  WORD    anchor number (0000h-0009h)
                WORD    new value for the anchor
Return: AX = status
            0000h successful
            FFFFh failed (top word on stack not in range 00h-09h)
        STACK unchanged
SeeAlso: AX=7101h
--------N-1A7101-----------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_GETANCHOR"
        AX = 7101h
        STACK:  WORD    anchor number (0000h-0009h)
Return: AX = anchor's value
        STACK unchanged
Program: SNAP.EXE is a TSR written by IBM and Carnegie Mellon University
          which implements the Simple Network Application Protocol
SeeAlso: AX=7002h
--------N-1A7202-----------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_SETCONVPARMS" - SET CONVERSATION PARAMETERS
        AX = 7202h
        STACK:  WORD    conversation ID (0000h-0009h)
                WORD    offset within resident data segment of "Cparms"
                          structure (see #00655)
Return: AX = status???
        STACK unchanged
SeeAlso: AX=6308h
--------N-1A7302-----------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_CLIENTVERSION" - ???
        AX = 7302h
        STACK:  WORD    conversation ID (0000h-0009h)
                WORD    offset within resident data segment of ???
Return: AX = ???
        ???
        STACK unchanged
SeeAlso: AX=7400h
--------N-1A7400-----------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_VERSION" - GET VERSION
        AX = 7400h
Return: AX = version (AH=major, AL=minor)
Note:   this call is only valid if SNAP is installed
SeeAlso: AX=7302h,INT 1A/AX=6F01h
--------N-1A75-------------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_NOP" - ???
        AH = 75h
        AL = ???
Return: AX = ??? (0000h)
Program: SNAP.EXE is a TSR written by IBM and Carnegie Mellon University
          which implements the Simple Network Application Protocol
--------N-1A76-------------------------------
INT 1A - SNAP.EXE 3.2+ - "SNAP_802_5" - ???
        AH = 76h
        AL = ???
Return: AX = ???
--------N-1A77-------------------------------
INT 1A - SNAP.EXE 3.4 - ???
        AH = 77h
        AL = ??? (at least 01h)
        STACK:  WORD    ???
                ???
Return: ???
        STACK unchanged
--------N-1A7802-----------------------------
INT 1A - SNAP.EXE 3.4 - ???
        AX = 7802h
        STACK:  WORD    ???
                WORD    ???
Return: ???
        STACK unchanged
Program: SNAP.EXE is a TSR written by IBM and Carnegie Mellon University
          which implements the Simple Network Application Protocol
--------s-1A7F-------------------------------
INT 1A - Tandy 2500, Tandy 1000L series - DIGITAL SOUND???
        AH = 7Fh
        ???
Return: ???
Note:   this function is not supported by the Tandy 1000SL/TL BIOS
SeeAlso: AH=80h,AH=83h,AH=85h
--------s-1A80-------------------------------
INT 1A - PCjr, Tandy 2500???, Tandy 1000SL/TL - SET UP SOUND MULTIPLEXOR
        AH = 80h
        AL = 00h source is 8253 channel 2
             01h source is cassette input
             02h source is I/O channel "Audio IN"
             03h source is sound generator chip
Note:   although documented in the 1000TL Technical Reference, the 1000TL
          BIOS has just an IRET for this call
SeeAlso: AH=7Fh,AH=83h
--------X-1A80-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - GET NUMBER OF ADAPTERS
        AH = 80h
Return: CF clear if successful
            CX = 5353h ('SS') if Socket Services installed
                AL = number of adapters present (0-16)
            AH destroyed
        CF set on error
            AH = error code (see #00656)
SeeAlso: AH=83h"PCMCIA"

(Table 00656)
Values for PCMCIA error codes:
 01h    "BAD_ADAPTER" nonexistent adapter
 02h    "BAD_ATTRIBUTE" invalid attribute specified
 03h    "BAD_BASE" invalid system memory base address
 04h    "BAD_EDC" invalid EDC generator specified
 05h    "BAD_INDICATOR" invalid indicator specified
 06h    "BAD_IRQ" invalid IRQ channel specified
 07h    "BAD_OFFSET" invalid PCMCIA card offset specified
 08h    "BAD_PAGE" invalid page specified
 09h    "BAD_READ" unable to complete request
 0Ah    "BAD_SIZE" invalid window size specified
 0Bh    "BAD_SOCKET" nonexistent socket specified
 0Ch    "BAD_TECHNOLOGY" unsupported Card Technology for writes
 0Dh    "BAD_TYPE" unavailable window type specified
 0Eh    "BAD_VCC" invalid Vcc power level index specified
 0Fh    "BAD_VPP" invalid Vpp1 or Vpp2 power level index specified
 10h    "BAD_WAIT" invalid number of wait states specified
 11h    "BAD_WINDOW" nonexistent window specified
 12h    "BAD_WRITE" unable to complete request
 13h    "NO_ADAPTERS" no adapters installed, but Socket Services is present
 14h    "NO_CARD" no card in socket
 15h    function not supported
 16h    invalid mode
 17h    invalid speed
 18h    busy
--------X-1A81-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - REGISTER STATUS CHANGE CALLBACK
        AH = 81h
        DS:DX -> callback routine (see #00657) or 0000h:0000h to disable
Return: CF clear if successful
            AH destroyed
        CF set on error
            AH = error code (see #00656)
Note:   the callback will be invoked on any socket changes whose notification
          has not been disabled with the status change enable mask; it may be
          invoked either while processing a hardware interrupt from the adapter
          or while processing the following Socket Services request
SeeAlso: AH=80h"PCMCIA",AH=82h"PCMCIA"

(Table 00657)
Values PCMCIA callback routine is invoked with:
        AL = adapter number
        BH = status change interrupt enable mask (see #00658)
        BL = socket number
        DH = current socket status (see #00659)
        DL = current card status (see #00660)
Return: all registers preserved
Notes:  the callback may be invoked during a hardware interrupt, and may not
          call on Socket Services
        the callback will be invoked once for each socket with a status change

Bitfields for PCMCIA status change interrupt enable mask:
Bit(s)  Description     (Table 00658)
 7      card detect change
 6      ready change
 5      battery warning change
 4      battery dead change
 3      insertion request
 2      ejection request
 1-0    reserved (0)

Bitfields for PCMCIA current socket status:
Bit(s)  Description     (Table 00659)
 7      card changed
 6      reserved (0)
 5      card insertion complete
 4      card ejection complete
 3      card insertion request pending
 2      card ejection request pending
 1      card locked
 0      reserved (0)

Bitfields for PCMCIA current card status:
Bit(s)  Description     (Table 00660)
 7      card detect
 6      ready
 5      battery voltage detect 2 (battery warning)
 4      battery voltage detect 1 (battery dead)
 3-1    reserved (0)
 0      write protected
--------s-1A8100-----------------------------
INT 1A - Tandy 2500, Tandy 1000L series - DIGITAL SOUND - INSTALLATION CHECK
        AX = 8100h
Return: AL > 80h if supported
        AX = 00C4h if supported (1000SL/TL)
            CF set if sound chip is busy
            CF clear  if sound chip is free
Note:   the value of CF is not definitive; call this function until CF is
          clear on return, then call AH=84h"Tandy"
--------s-1A82-------------------------------
INT 1A - Tandy 2500???, Tandy 1000SL/TL - DIGITAL SOUND - RECORD SOUND
        AH = 82h
        ES:BX -> buffer for sound samples
        CX = length of buffer
        DX = transfer rate (1-4095, 1 is fastest)
Return: AH = 00h
        CF set if sound busy
        CF clear if sound chip free
Note:   the value in DX should be 1/10 the corresponding value for
          INT 1A/AH=83h on the 1000TL, 1/11.5 on the 1000SL.  Call
          INT 1A/AX=8100h and INT 1A/AH=84h before invoking this function.
        The BIOS issues an INT 15/AX=91FBh when the input is complete
        DMA across a 64K boundary is masked by the BIOS
--------X-1A82-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - REGISTER CARD TECHNOLOGY CALLBACK
        AH = 82h
        DS:DX -> callback routine (see #00661) or 0000h:0000h
Return: CF clear if successful
            AH destroyed
        CF set on error
            AH = error code (see #00656)
Note:   the callback is invoked on a Write Multiple request with an unsupported
          card technology type
SeeAlso: AH=81h"PCMCIA",AH=94h

(Table 00661)
Values PCMCIA callback routine is invoked with:
        ES:AX -> Low-Level Socket Services Routines (see #00663)
        BH = socket attributes (see #00662)
        CX = number of bytes or words to write
        DS:SI -> data buffer to be written
        DX:DI -> 26-bit linear card address
        BP = card technology type
Return: CF clear if successful
        CF set on error
            AH = error code (07h,0Ch,12h,14h) (see #00656)

Bitfields for PCMCIA socket attributes:
Bit(s)  Description     (Table 00662)
 7-4    reserved (0)
 3      packed buffer
 2      even bytes only (only valid if 1 set)
 1      data width (clear = byte, set = word)
 0      memory type (clear = common, set = attribute)

Format of PCMCIA Low-Level Socket Services Routines:
Offset  Size    Description     (Table 00663)
 00h    WORD    offset of Write Many routine (see #00664)
 02h    WORD    offset of Write One routine (see #00665)
 04h    WORD    offset of Read One routine (see #00666)
 06h    WORD    offset of Increment Offset routine (see #00667)
 08h    WORD    offset of Set Offset routine (see #00668)
 0Ah    WORD    offset of Get Status routine (see #00669)

(Table 00664)
Call Write Many routine with:
        BH = socket attributes (see #00662)
        CX = number of bytes or words to write
        DS:SI -> data to be written
Return: CF clear if successful
        CF set on error

(Table 00665)
Call Write One routine with:
        AL/AX = data to be written
        BH = socket attributes (see #00662)
Return: CF clear if successful
        CF set on error

(Table 00666)
Call Read One routine with:
        BH = socket attributes (see #00662)
Return: CF clear if successful
            AL/AX = data read
        CF set on error

(Table 00667)
Call Increment Offset routine with:
        BH = socket attributes (see #00662)
Return: CF clear if successful
        CF set on error

(Table 00668)
Call Set Offset routine with:
        DX:DI = new offset address
Return: CF clear if successful
        CF set on error

(Table 00669)
Call Get Status routine with:
        nothing
Return: AL = current card status (see #00660)
--------s-1A83-------------------------------
INT 1A - Tandy 2500, Tandy 1000L series - START PLAYING DIGITAL SOUND
        AH = 83h
        AL = volume (0=silence, 7=highest)
        CX = number of bytes to play
        DX = time between sound samples (multiples of 273 nanoseconds)
            only bits 11-0 used
        ES:BX -> sound data (array of 8-bit unsigned PCM samples)
Return: AH = 00h
        CF set if sound is busy
        CF clear if sound chip is free
Notes:  this call returns immediately while the sound plays in the
          background; the sound chip is clocked at 3.57 MHz, with the low 12
          bits of DX specifying the clock divisor
        The BIOS appears to call INT 15/AX=91FBh when the sound device
          underflows to allow another INT 1A/AH=83h for seamless playing of
          long sounds.
SeeAlso: AH=84h"Tandy",INT 15/AH=91h
--------X-1A83-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - GET SOCKET SERVICES VERSION NUMBER
        AH = 83h
        AL = adapter number
Return: CF clear if successful
            AX = Socket Services version (BCD)
            BX = implementation version (BCD)
            CX = 5353h ("SS")
            DS:SI -> ASCIZ implementor description
        CF set on error
            AH = error code (01h) (see #00656)
Note:   the current version (from the Revision A.00 documentation) of Socket
          Services is 1.00 (AX=0100h)
SeeAlso: AH=80h"PCMCIA"
--------s-1A84-------------------------------
INT 1A - Tandy 2500, Tandy 1000L series - STOP PLAYING DIGITAL SOUND
        AH = 84h
Return: ???
Note:   the BIOS will call INT 15/AX=91FBh when the sound has stopped playing
SeeAlso: AH=83h"Tandy",AH=85h"Tandy"
--------X-1A84-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - INQUIRE ADAPTER
        AH = 84h
        AL = adapter number
Return: CF clear if successful
            AH destroyed
            BH = number of windows
            BL = number of sockets (1-16)
            CX = number of EDCs
            DH = capabilities (see #00670)
            DL = status change interrupt used (only if DH bit 3 set)(see #00671)
        CF set on error
            AH = error code (01h) (see #00656)
SeeAlso: AH=80h"PCMCIA",AH=85h"PCMCIA",AH=87h

Bitfields for PCMCIA capabilities:
Bit(s)  Description     (Table 00670)
 7-6    reserved (0)
 5      status change interrupt is hardware shareable
 4      status change interrupt is software shareable
 3      status change interrupt
 2      data bus width is per-socket rather than per-window
 1      power management is per-adapter rather than per-socket
 0      indicators are per-adapter rather than per-socket

(Table 00671)
Values for PCMCIA status change interrupt usage:
 00h-0Fh IRQ level
 10h    NMI
 11h    I/O check
 12h    bus error
 13h    vendor specific
 14h-FFh reserved
--------s-1A85-------------------------------
INT 1A - Tandy 2500, Tandy 1000L series - DIGITAL SOUND???
        AH = 85h
        ???
Return: ???
Note:   this function is not supported by the Tandy 1000SL/TL BIOS
SeeAlso: AH=7Fh,AH=83h"Tandy"
--------X-1A85-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - GET ADAPTER
        AH = 85h
        AL = adapter number
Return: CF clear if successful
            AH destroyed
            DH = adapter attributes (see #00672)
        CF set on error
            AH = error code (01h) (see #00656)
SeeAlso: AH=84h"PCMCIA",AH=86h

Bitfields for PCMCIA adapter attributes:
Bit(s)  Description     (Table 00672)
 7-5    reserved (0)
 4      hardware share status change
 3      software share status change
 2      enable status change interrupts
 1      adapter preserves state information during reduced power consumption
 0      attempting to reduce power consumption
--------X-1A86-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - SET ADAPTER
        AH = 86h
        AL = adapter number
        DH = new adapter attributes (see #00672)
Return: CF clear if successful
            AH destroyed
        CF set on error
            AH = error code (01h) (see #00656)
SeeAlso: AH=84h"PCMCIA",AH=85h"PCMCIA"
--------X-1A87-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - INQUIRE WINDOW
        AH = 87h
        AL = adapter number
        BH = window number
Return: CF clear if successful
            AH destroyed
            BL = capabilities (see #00673)
            CX = bitmap of assignable sockets
            DH = EISA A15-A12 address lines (in bits 7-4, bits 3-0 = 0)
            DL = supported access speeds (see #00674)
            DS:SI -> Memory Window Characteristics table (see #00675)
            DS:DI -> I/O Window Characteristics table (see #00676)
        CF set on error
            AH = error code (01h,11h) (see #00656)
SeeAlso: AH=84h"PCMCIA",AH=88h,AH=89h,AH=8Ch

Bitfields for PCMCIA window capabilities:
Bit(s)  Description     (Table 00673)
 7-5    reserved (0)
 4      separate enable for EISA comon space
 3      EISA I/O mappable
 2      I/O space
 1      attribute memory
 0      common memory

Bitfields for PCMCIA supported access speeds:
Bit(s)  Description     (Table 00674)
 7      reserved (0)
 6      600 ns
 5      300 ns
 4      250 ns
 3      200 ns
 2      150 ns
 1      100 ns
 0      WAIT line monitoring

Format of PCMCIA Memory Window Characteristics table:
Offset  Size    Description     (Table 00675)
 00h    WORD    window capabilities (see #00677)
 02h    WORD    minimum base address in 4K pages
 04h    WORD    maximum base address in 4K pages
 06h    WORD    minimum window size in 4K pages
 08h    WORD    maximum window size in 4K pages
 0Ah    WORD    window size granularity (4K units)
 0Ch    WORD    required base address alignment (4K units)
 0Eh    WORD    required card offset alignment (4K units)

Format of PCMCIA I/O Window Characteristics table:
Offset  Size    Description     (Table 00676)
 00h    WORD    window capabilities (see #00677)
 02h    WORD    minimum base address in bytes
 04h    WORD    maximum base address in bytes
 06h    WORD    minimum window size in bytes
 08h    WORD    maximum window size in bytes
 0Ah    WORD    window size granularity (bytes)

Bitfields for PCMCIA window capabilities:
Bit(s)  Description     (Table 00677)
 0      programmable base address
 1      programmable window size
 2      window disable/enable supported
 3      8-data bus
 4      16-data bus
 5      base address alignment on size boundary required
 6      power-of-two size granularity
---memory windows---
 7      card offset must be aligned on size boundary
 8      paging hardware available
 9      paging hardware shared
 10     page disable/enable supported
 11-15  reserved (0)
---I/O windows---
 7-15   reserved (0)
--------X-1A88-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - GET WINDOW
        AH = 88h
        AL = adapter number
        BH = window number
Return: CF clear if successful
            AH destroyed
            BL = socket number (0-16) (0 = not assigned)
            CX = window size (bytes for I/O window, 4K units for memory window)
            DH = window attributes (see #00678)
            DL = access speed (only one bit set) (see #00674)
            SI = window base address (bytes if I/O, 4K units if memory)
            DI = card offset address (memory only, 4K units)
        CF set on error
            AH = error code (01h,11h) (see #00656)
SeeAlso: AH=87h,AH=89h,AH=8Ah

Bitfields for PCMCIA window attributes:
Bit(s)  Description     (Table 00678)
 0      memory-mapped rather than I/O-mapped
 1      attribute memory rather than common (memory-mapped)
        EISA mapped (I/O)
 2      enabled
 3      16-data path
 4      subdivided into pages (memory-mapped only)
 5      non-specific access slot enable (EISA-mapped only)
 6-7    reserved (0)
--------X-1A89-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - SET WINDOW
        AH = 89h
        AL = adapter number
        BH = window number
        BL = socket number
        CX = window size (bytes if I/O window, 4K units if memory window)
        DH = window attributes (see #00678)
        DL = access speed (only one bit set) (see #00674)
        SI = window base address (bytes if I/O, 4K units if memory window)
        DI = card offset addrress (memory only, 4K units)
Return: CF clear if successful
            AH destroyed
        CF set on error
            AH = error code (01h,03h,07h,08h,0Ah,0Bh,0Dh,10h,11h) (see #00656)
SeeAlso: AH=87h,AH=88h,AH=8Bh
--------X-1A8A-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - GET PAGE
        AH = 8Ah
        AL = adapter number
        BH = window number
        BL = page number
Return: CF clear if successful
            AH destroyed
            DX = page attributes (see #00679)
            DI = memory card offset (4K units)
        CF set on error
            AH = error code (01h,08h,11h) (see #00656)
Notes:  this function is only valid for memory-mapped windows
        the socket being operated on is implied by the previous AH=89h call
SeeAlso: AH=88h,AH=8Bh

Bitfields for PCMCIA page attributes:
Bit(s)  Description     (Table 00679)
 0      page enabled
 15-1   reserved (0)
--------X-1A8B-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - SET PAGE
        AH = 8Bh
        AL = adapter number
        BH = window number
        BL = page number
        DX = page attributes (see #00679)
        DI = memory card offset (4K units)
Return: CF clear if successful
            AH destroyed
        CF set on error
            AH = error code (01h,02h,07h,08h,11h) (see #00656)
Notes:  this function is only valid for memory-mapped windows
        the socket being operated on is implied by the previous AH=89h call
SeeAlso: AH=89h,AH=8Ah
--------X-1A8C-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - INQUIRE SOCKET
        AH = 8Ch
        AL = adapter number
        BL = socket number (01h to maximum supported by adapter)
Return: CF clear if successful
            AH destroyed
            DH = capabilities (see #00680)
            DL = hardware indicators (see #00681)
            DS:SI -> Socket Characteristics table (see #00682)
            DS:DI -> Power Management table (see #00684)
        CF set on error
            AH = error code (01h,0Bh) (see #00656)
SeeAlso: AH=87h,AH=8Dh,AH=8Eh

Bitfields for PCMCIA socket capabilities:
Bit(s)  Description     (Table 00680)
 0      card change
 1      card lock
 2      insert card (motor control)
 3      eject card (motor control)
 4-7    reserved (0)

Bitfields for PCMCIA socket hardware indicators:
Bit(s)  Description     (Table 00681)
 0      busy status
 1      write-protected
 2      battery status
 3      card lock status
 4      XIP status (eXecute-In-Place)
 5-7    reserved (0)

Format of PCMCIA Socket Characteristics table:
Offset  Size    Description     (Table 00682)
 00h    WORD    supported card types (see #00683)
 02h    WORD    steerable IRQ levels (bit 0 = IRQ0 to bit 15 = IRQ15)
 04h    WORD    additional steerable IRQ levels
                bit 0: NMI
                bit 1: I/O check
                bit 2: bus error
                bit 3: vendor-unique
                bits 4-7 reserved (0)

Bitfields for supported card types:
Bit(s)  Description     (Table 00683)
 0      memory card
 1      I/O card
 2-7    reserved (0)

Format of PCMCIA Power Management table:
Offset  Size    Description     (Table 00684)
 00h    WORD    number of entries in table (0 if power management not avail)
 02h 2N BYTEs   power levels
                byte 0: voltage in 0.1V units
                byte 1: power supply
                        bit 7: Vcc
                        bit 6: Vpp1
                        bit 5: Vpp2
--------X-1A8D-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - GET SOCKET
        AH = 8Dh
        AL = adapter number
        BL = socket number (01h to maximum supported by adapter)
Return: CF clear if successful
            AH destroyed
            BH = status change interrupt enable mask (see #00658)
            CH = Vcc level (lower nybble) (see #00684)
            CL = Vpp1 level (upper nybble) and Vpp2 level (lower nybble)
            DH = current socket status (see #00659)
            DL = indicators (see #00681)
            SI = card type (see #00685)
            DI = IRQ level steering (I/O only) (see #00686)
        CF set on error
            AH = error code (01h,0Bh) (see #00656)
SeeAlso: AH=8Ch,AH=8Eh

Bitfields for PCMCIA card type:
Bit(s)  Description     (Table 00685)
 0      memory
 1      I/O
 2-15   reserved (0)

Bitfields for PCMCIA I/O level steering:
Bit(s)  Description     (Table 00686)
 15     interrupt steering enabled
 14-5   reserved (0)
 4-0    IRQ level (0-15=IRQ,16=NMI,17=I/O check,18=bus error,19=vendor)
--------X-1A8E-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - SET SOCKET
        AH = 8Eh
        AL = adapter number
        BL = socket number (01h to maximum supported by adapter)
        BH = status change interrupt enable mask (see #00658)
        CL = Vpp1 level (upper nybble) and Vpp2 level (lower nybble)
        DH = current socket status (see #00659)
        DL = indicators (see #00681)
        SI = card type (see #00685)
        DI = IRQ level steering (I/O only) (see #00686)
Return: CF clear if successful
            AH destroyed
        CF set on error
            AH = error code (01h,02h,05h,06h,0Bh,0Eh,0Fh) (see #00656)
SeeAlso: AH=8Ch,AH=8Dh
--------X-1A8F-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - GET CARD
        AH = 8Fh
        AL = adapter number
        BL = socket number (01h to maximum supported by adapter)
Return: CF clear if successful
            AH destroyed
            DL = current card status (see #00660)
        CF set on error
            AH = error code (01h,0Bh) (see #00656)
SeeAlso: AH=8Dh,AH=90h
--------X-1A90-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - RESET CARD
        AH = 90h
        AL = adapter number
        BL = socket number (01h to maximum supported by adapter)
Return: CF clear if successful
            AH destroyed
        CF set on error
            AH = error code (01h,0Bh,14h) (see #00656)
Note:   toggles RESET pin of the specified card, but does not wait after
          toggling the pin; it is the caller's responsibility to avoid
          accessing the card before it is ready again
--------X-1A91-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - READ ONE
        AH = 91h
        AL = adapter number
        BL = socket number (01h to maximum supported by adapter)
        BH = attributes (see #00687)
        DX:SI = card address
Return: CF clear if successful
            AH destroyed
            CL/CX = value read
        CF set on error
            AH = error code (01h,07h,09h,0Bh,14h) (see #00656)
            CX may be destroyed
Note:   this function is only valid for I/O-mapped sockets
SeeAlso: AH=92h,AH=93h,INT 21/AX=440Dh"DOS 3.2+"

Bitfields for PCMCIA attributes:
Bit(s)  Description     (Table 00687)
 2      even bytes only
 1      word rather than byte
 0      attribute memory instead of common memory
--------X-1A92-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - WRITE ONE
        AH = 92h
        AL = adapter number
        BL = socket number (01h to maximum supported by adapter)
        BH = attributes (see #00687)
        CL/CX = value to write
        DX:SI = card address
Return: CF clear if successful
            AH destroyed
        CF set on error
            AH = error code (01h,07h,0Bh,12h,14h) (see #00656)
Note:   this function is only valid for I/O-mapped sockets; it also does not
          implement Card Technology handling--use AH=94h when writing to
          non-RAM technologies
SeeAlso: AH=91h,AH=94h,INT 21/AX=440Dh"DOS 3.2+"
--------X-1A93-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - READ MULTIPLE
        AH = 93h
        AL = adapter number
        BL = socket number (01h to maximum supported by adapter)
        BH = attributes (see #00687)
        CX = number of bytes or words to read
        DX:SI = card address
        DS:DI -> data buffer to be filled
Return: CF clear if successful
            AH destroyed
        CF set on error
            AH = error code (01h,07h,09h,0Bh,14h) (see #00656)
Note:   this function is only available on I/O-mapped sockets
SeeAlso: AH=91h,AH=94h,INT 21/AX=440Dh"DOS 3.2+"
--------X-1A94-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - WRITE MULTIPLE
        AH = 94h
        AL = adapter number
        BL = socket number (01h to maximum supported by adapter)
        BH = attributes (see #00687)
        CX = number of bytes or words to read
        DX:DI = card address
        DS:SI -> buffer containing data
        BP = Card Technology type (0000h = RAM)
Return: CF clear if successful
            AH destroyed
        CF set on error
            AH = error code (01h,07h,0Bh,0Ch,12h,14h) (see #00656)
Notes:  this function is only available on I/O-mapped sockets
        Socket Services calls the Card Technology callback (see #00661) for
          any card technology it does not directly support
SeeAlso: AH=82h"PCMCIA",AH=92h,AH=93h,INT 21/AX=440Dh"DOS 3.2+"
--------X-1A95-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - INQUIRE ERROR DETECTION CODE
        AH = 95h
        AL = adapter number
        BH = EDC generator number
Return: CF clear if successful
            AH destroyed
            CX = bitmap of assignable sockets
            DH = EDC capabilities (see #00688)
            DL = supported EDC types (see #00689)
        CF set on error
            AH = error code (01h,04h) (see #00656)
SeeAlso: AH=96h,AH=9Ch

Bitfields for EDC capabilities:
Bit(s)  Description     (Table 00688)
 0      unidirectional only generation
 1      bidirectional only generation
 2      register-based (I/O-mapped) support
 3      memory-mapped support
 4      pausable
 5-7    reserved (0)

Bitfields for supported EDC types:
Bit(s)  Description     (Table 00689)
 0      8-checksum
 1      16-CRC-SDLC
 2-7    reserved (0)
--------X-1A96-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - GET ERROR DETECTION CODE
        AH = 96h
        AL = adapter number
        BH = EDC generator number
Return: CF clear if successful
            AH destroyed
            BL = socket number
            DH = EDC attributes (see #00690)
            DL = EDC type (see #00689) (only one bit set)
        CF set on error
            AH = error code (01h,04h) (see #00656)
SeeAlso: AH=95h,AH=97h,AH=9Ch

Bitfields for EDC attributes:
Bit(s)  Description     (Table 00690)
 0      unidirectional only
 1      (if 0 set) clear=read, set=write
 2-7    reserved (0)
--------X-1A97-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - SET ERROR DETECTION CODE
        AH = 97h
        AL = adapter number
        BH = EDC generator
        BL = socket number
        DH = EDC attributes (see #00690)
        DL = EDC type (see #00689) (only one bit may be set)
Return: CF clear if successful
            AH destroyed
        CF set on error
            AH = error code (01h,02h,04h,0Bh) (see #00656)
SeeAlso: AH=96h,AH=9Ch
--------X-1A98-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - START ERROR DETECTION CODE
        AH = 98h
        AL = adapter number
        BH = EDC generator
Return: CF clear if successful
            AH destroyed
        CF set on error
            AH = error code (01h,04h) (see #00656)
SeeAlso: AH=96h,AH=99h,AH=9Bh,AH=9Ch
--------X-1A99-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - PAUSE ERROR DETECTION CODE
        AH = 99h
        AL = adapter number
        BH = EDC generator
Return: CF clear if successful
            AH destroyed
        CF set on error
            AH = error code (01h,04h) (see #00656)
SeeAlso: AH=9Ah
--------X-1A9A-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - RESUME ERROR DETECTION CODE
        AH = 9Ah
        AL = adapter number
        BH = EDC generator
Return: CF clear if successful
            AH destroyed
        CF set on error
            AH = error code (01h,04h) (see #00656)
SeeAlso: AH=99h,AH=98h
--------X-1A9B-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - STOP ERROR DETECTION CODE
        AH = 9Bh
        AL = adapter number
        BH = EDC generator
Return: CF clear if successful
            AH destroyed
        CF set on error
            AH = error code (see #00656)
SeeAlso: AH=98h,AH=99h,AH=9Ch
--------X-1A9C-------------------------------
INT 1A - PCMCIA Socket Services v1.00 - READ ERROR DETECTION CODE
        AH = 9Ch
        AL = adapter number
        BH = EDC generator
Return: CF clear if successful
            AH destroyed
            DL/DX = computed checksum or CRC
        CF set on error
            AH = error code (01h,04h) (see #00656)
SeeAlso: AH=95h,AH=96h,AH=98h,AH=99h,AH=9Bh
--------X-1A9D-------------------------------
INT 1A - PCMCIA Socket Services v2.1??? - GET VENDOR INFO
        AH = 9Dh
        AL = adapter number
        BH = EDC generator
        ES:EDI -> vendor information structure (see #00691)
Return: CF clear if successful
            AH destroyed
            DX = vendor release number in BCD
            ES:EDI unchanged
        CF set on error
            AH = error code (01h,15h) (see #00656)
Notes:  this API is supported by recent versions of the AMI BIOS
        the low-level API described here is hidden by the higher-level
          ExCA API once Card Services has been installed
SeeAlso: AH=9Dh"ExCA"

Format of Vendor Information structure:
Offset  Size    Description     (Table 00691)
 00h    WORD    buffer length (set to size of buffer below)
 04h    WORD    (ret) data length
 08h  x BYTEs   implementor name (ASCIIZ string)
--------X-1A9D-------------------------------
INT 1A - Intel PCMCIA ExCA Card Services - API
        AH = 9Dh
        AL = subfunction (see #00692)
        ???
Return: ???
SeeAlso: AH=9Dh"ExCA",#00891

(Table 00692)
Values for PCMCIA ExCA Card Services subfunction number:
 00h    Client Services: Get Number of Sockets
 01h    Advanced Client Utilities: Initialize
 02h    Client Services: Register Client
 03h    Client Services: Deregister Client
 04h    Advanced Client Utilities: Enumerate Clients
 05h    Client Services: Register SCB
 06h    Client Services: Deregister SCB
 07h    Advanced Client Utilities: Register MTD
 08h    Advanced Client Utilities: Deregister MTD
 09h    Advanced Client Utilities: Enumerate MTD
 0Ah    Client Services: Get Status
 0Bh    Client Services: Reset Card
 0Ch    Client Utilities: Get First Tuple
 0Dh    Client Utilities: Get Next Tuple
 0Eh    Client Utilities: Determine First Region
 0Fh    Client Utilities: Determine Next Region
 10h    Client Utilities: Get First Region
 11h    Client Utilities: Get Next Region
 12h    Client Utilities: Get First Partition
 13h    Client Utilities: Get Next Partition
 14h    Bulk Memory Services: Open Region
 15h    Bulk Memory Services: Read Memory
 16h    Bulk Memory Services: Write Memory
 17h    Bulk Memory Services: Copy Memory
 18h    Bulk Memory Services: Erase Memory
 19h    Resource Management: Request I/O
 1Ah    Resource Management: Release I/O
 1Bh    Resource Management: Request Memory
 1Ch    Client Services: Modify Window
 1Dh    Resource Management: Release Memory
 1Eh    Client Services: Map Mem Page
 1Fh    Advanced Client Utilities: Return SS Entry
 20h    Advanced Client Utilities: Map Log to Phy
 21h    Advanced Client Utilities: Map Log Phy to Log
 22h    Resource Management: Request IRQ
 23h    Resource Management: Release IRQ
 24h    Bulk Memory Services: Close Region
--------X-1A9E-------------------------------
INT 1A - PCMCIA Socket Services v2.1 - ACKNOWLEDGE INTERRUPT
        AH = 9Eh
        AL = adapter number
Return: CF clear if successful
            AH destroyed
            CX = bitmap representing sockets which have changed status
        CF set on error
            AH = error code (01h) (see #00656)
Note:   this API is supported by recent versions of the AMI BIOS
--------X-1A9F-------------------------------
INT 1A - PCMCIA Socket Services v2.1 - GET/SET PRIOR INT 1A HANDLER
        AH = 9Fh
        AL = adapter number
        BL = mode
            00h get prior INT 1Ah handler
            01h set prior INT 1Ah handler
                CX:DX -> new prior handler
Return: CF clear if successful
            AH destroyed
            CX:DX -> old prior handler
        CF set on error
            AH = error code (01h,15h,18h) (see #00656)
Desc:   allows hooking of INT 16h "behind" the Socket Services hook
Note:   this API is supported by recent versions of the AMI BIOS
SeeAlso: AH=9Eh,AH=A0h"PCMCIA",AH=AEh"PCMCIA"
--------c-1AA0-------------------------------
INT 1A U - Disk Spool II v2.07+ - INSTALLATION CHECK
        AH = A0h
Return: AH = B0h if installed
            AL = pending INT 1A/AH=D0h subfunction if nonzero???
            ES = code segment
            ES:BX -> name of current spool file
            ES:SI -> current despool file
            CL = despooler state (00h disabled, 41h enabled)
            CH = spooler state (00h disabled, 41h enabled)
            DL = despooler activity
                00h currently active printing a file
                41h standing by
            DH = 00h ???
               = 41h ???
            DI = 0000h ???
                 0001h ???
Program: Disk Spool II is a shareware disk-based print spooler by Budget
          Software Company
Note:   this function is also supported by Vertisoft's Emulaser utility ELSPL,
          as that is a licensed version of Disk Spool II
SeeAlso: AH=ABh,AH=C0h,AH=D0h,AH=E1h
--------X-1AA0-------------------------------
INT 1A - PCMCIA Socket Services v2.1 - GET/SET SOCKET SERVICES ADDRESS
        AH = A0h
        AL = adapter number
        BH = mode
            00h real mode
            01h 16:16 protected mode
            02h 16:32 protected mode
            03h 00:32 (Flat) protected mode
        BL = subfunction
            00h return number of additional data areas (see #00693)
            01h return description of additional data areas (see #00694)
            02h accept mode-specific pointers to data areas (see #00695)
        ES:EDI -> buffer supplied by caller
Return: CF clear if successful
            AH destroyed
            CX = number of additional data areas
            ES:EDI unchanged
        CF set on error
            AH = error code (01h,02h,15h,16h,18h) (see #00656)
SeeAlso: AH=9Fh,AH=AEh

Format of PCMCIA Subfunction 00h Buffer Table Entry structure:
Offset  Size    Description     (Table 00693)
 00h    DWORD   32-bit linear base address of the code segment
 04h    DWORD   segment limit of the code segment
 08h    DWORD   entry point offset
 0Ch    DWORD   32-bit linear base address of the data segment
                (ignored in 00:32 flat mode)
 10h    DWORD   segment limit of the data segment
 14h    DWORD   data area offset.  Only used in 32-bit protected mode.
SeeAlso: #00694,#00695

Format of PCMCIA Additional Data Area Description structure [array]:
Offset  Size    Description     (Table 00694)
 00h    DWORD   32-bit linear base address of the additional data segment
                (ignored in 00:32 flat mode)
 04h    DWORD   segment limit of the code segment
 08h    DWORD   data area offset (only used in 32-bit protected mode)
SeeAlso: #00693,#00695

Format of PCMCIA Subfunction 02h Buffer Table Entry structure:
Offset  Size    Description     (Table 00695)
 00h    DWORD   32-bit offset(ignored in 16:16 protected mode)
 04h    DWORD   selector (only used in 00:32 flat mode)
 08h    DWORD   reserved
SeeAlso: #00693,#00694
--------X-1AA1-------------------------------
INT 1A - PCMCIA Socket Services v2.1 - GET ACCESS OFFSETS
        AH = A1h
        AL = adapter number
        BH = Mode
             00h = Real Mode
             01h = 16:16 Protected Mode
             02h = 16:32 Protected Mode
             03h = 00:32 Protected Mode
        CX = Number of access offsets
        ES:EDI -> buffer supplied by caller, CX words long (see #00696)
Return: CF clear if successful
            AH destroyed
            DX = number of access offsets supported
            ES:EDI unchanged
        CF set on error
            AH = error code (01h,15h,16h) (see #00656)
Desc:   Returns an array of low-level adapter-specific optimized
        PC Card access routines for adapters that use registers
        or I/O ports to access PC Card memory.  Adapters that access
        PC Card memory through windows mapped to host system memory
        do not support this function.
Note:   offsets returned are 16-bit offsets into the
        Socket Services code segment.  They must be called
        appropriately for the processor mode selected.
        (Real, 16:16 and 16:32 modes use FAR CALL,
        Flat 00:32 mode uses a 32-bit NEAR CALL).
SeeAlso: AH=AEh

Format of Offset Table structure:
Offset  Size    Description     (Table 00696)
 00h    WORD    Set Address
 02h    WORD    Set Auto Increment
 04h    WORD    Read Byte
 06h    WORD    Read Word
 08h    WORD    Read Byte with Auto Increment
 0Ah    WORD    Read Word with Auto Increment
 0Ch    WORD    Read Words
 0Eh    WORD    Read Words with Auto Increment
 10h    WORD    Write Byte
 12h    WORD    Write Word
 14h    WORD    Write Byte with Auto Increment
 16h    WORD    Write Word with Auto Increment
 18h    WORD    Write Words
 1Ah    WORD    Write Words with Auto Increment
 1Ch    WORD    Compare Byte
 1Eh    WORD    Compare Byte with Auto Increment
 20h    WORD    Compare Words
 22h    WORD    Compare Words with Auto Increment
--------X-1AA2-------------------------------
INT 1A - CardBus Socket Services - ACCESS CONFIGURATION SPACE
        AH = A2h
        ??? details not available
Return: ???
--------X-1AA4-------------------------------
INT 1A - CardBus Socket Services - GET BRIDGE WINDOW / WINDOW CAPABILITIES
        AH = A4h
        ??? details not available
Return: ???
SeeAlso: AH=A5h"CardBus"
--------X-1AA5-------------------------------
INT 1A - CardBus Socket Services - SET BRIDGE WINDOW
        AH = A5h
        ??? details not available
Return: ???
SeeAlso: AH=A4h"CardBus"
--------c-1AAB-------------------------------
INT 1A U - Disk Spool II v1.83 - INSTALLATION CHECK
        AH = ABh
Return: AH = BAh if installed
            AL = pending INT 1A/AH=ADh subfunction if nonzero???
            ES = code segment
            ES:BX -> name of current spool file
            ES:SI -> current despool file
            CL = despooler state (00h disabled, 41h enabled)
            CH = spooler state (00h disabled, 41h enabled)
            DL = despooler activity
                00h currently active printing a file
                41h standing by
            DH = 00h ???
               = 41h ???
            DI = 0000h ???
                 0001h ???
Program: Disk Spool II is a shareware disk-based print spooler by Budget
          Software Company
SeeAlso: AH=A0h,AH=ACh,AH=ADh,AH=E1h
--------c-1AAC-------------------------------
INT 1A U - Disk Spool II v1.83 - INSTALLATION CHECK
        AH = ACh
Return: (see AH=ABh)
Note:   this function is identical to AH=ABh
SeeAlso: AH=A0h,AH=ABh,AH=ADh
--------c-1AAD-------------------------------
INT 1A U - Disk Spool II v1.83 - FUNCTION CALLS
        AH = ADh
        AL = function code (see #00697)
Return: AH = 00h if successful
SeeAlso: AH=ABh

(Table 00697)
Values for Disk Spool function code:
 02h    enable spooler only
 03h    enable the despooler
 04h    disable the despooler
 08h    inhibit popup menu
 09h    enable popup menu
 0Ah    ???
 0Bh    disable the spooler
 0Ch    start despooler after last successfully printed document???
 0Dh    start despooler at the exact point where it last left off???
 0Eh    pop up the menu
 0Fh    ???
 11h    ???
 14h    ???
 15h    ???
 16h    ???
 17h    ???
 18h    ???
 19h    ???
 20h    clear file pointed to by the despooler???
 21h    ???
 22h    ???
 23h    ???
 30h    ???
--------X-1AAE-------------------------------
INT 1A - PCMCIA Socket Services v2.1 - VENDOR SPECIFIC
        AH = AEh
        AL = adapter number
        all other registers are vendor-specific
Return: vendor specific
SeeAlso: AH=A1h,AH=AFh
--------X-1AAE-------------------------------
INT 1A - PCMCIA Socket Services v2.1 - API
        AH = AEh
        SI = function
            0002h ???
            0100h ???
            0101h ???
            8000h ???
            8001h ???
        details not yet available
Return: CF clear if successful
        CF set on error
            AH = error code (02h,0Bh,11h,15h,17h) (see #00656)
SeeAlso: AH=9Eh
--------X-1AAF-------------------------------
INT 1A - PCMCIA v2 Card Services - API
        AH = AFh
        AL = function
            00h close memory
            01h copy memory
            02h deregister client
            03h get client information (see #00702)
            04h get configuration information (see #00704)
            05h get first partition
            06h get first region
            07h get first tuple (see #00711)
            08h get next partition
            09h get next region
            0Ah get next tuple
            0Bh get Card Services information (see #00700)
            0Ch get status
            0Dh get tuple data (see #00712)
            0Eh get first client (see #00701)
            0Fh get/register Erase Queue
            10h register client (see #00713)
            11h reset function
            12h map logical socket
            13h map logical window
            14h map memory page
            15h map physical socket
            16h map physical window
            17h modify window
            18h open memory
            19h read memory
            1Ah register MTD
            1Bh release I/O
            1Ch release IRQ (see #00715)
            1Dh release window
            1Eh release configuration (see #00716)
            1Fh request I/O (see #00717)
            20h request IRQ (see #00718)
            21h reqeust window (see #00720)
            22h request socket mask
            23h return SS entry
            24h write memory
            25h deregister Erase Queue
            26h check Erase Queue
            27h modify configuration
            28h register timer
            29h set region
            2Ah get next client
            2Bh validate CIS
            2Ch request exclusive access (see #00723)
            2Dh release exclusive access (see #00723)
            2Eh get event mask
            2Fh release socket mask
            30h request configuration (see #00724)
            31h set event mask
            32h add Socket Service
            33h replace Socket Service
            34h vendor-specific
            35h adjust resource information
            36h access configuration register
            37h get first window
            38h get next window
            39h get memory page
            3Ah request DMA
            3Bh release DMA
        further details not yet available
Return: ??? = result code (see #00698)
SeeAlso: AH=AEh

(Table 00698)
Values for PCMCIA Card Services result codes:
 00h    successful
 01h    invalid adapter number
 02h    bad value for attribute field
 03h    bad value for base system memory address
 04h    invalid EDC generator specified
 05h    (reserved for historical reasons)
 06h    invalid IRQ level specified
 07h    invalid PC Card memory array offset
 08h    invalid page number specified
 09h    unable to complete read request
 0Ah    invalid size specified
 0Bh    invalid socket number
 0Ch    (reserved for historical reasons)
 0Dh    invalid window or interface type
 0Eh    invalid Vcc power level specified
 0Fh    invalid Vpp1 or Vpp2 power level specified
 10h    (reserved for historical reasons)
 11h    invalid window number
 12h    unable to complete write request
 13h    (reserved for historical reasons)
 14h    no PC Card in socket
 15h    service not supported by implementation
 16h    unsupported processor mode
 17h    specified speed not available
 18h    busy -- retry later
 19h    undefined error (general failure)
 1Ah    storage medium write protected
 1Bh    argument length in (E)CX is invalid
 1Ch    bad value(s) in argument packet
 1Dh    configuration has already been locked
 1Eh    requested resource already in use
 1Fh    no more items of requested type available
 20h    out of resources
 21h    invalid client handle
 22h    unsupported client version

(Table 00699)
Values for Card Services Callback Event codes:
 01h    battery dead
 02h    battery low
 03h    card locked
 04h    card has become ready
 05h    card removed
 06h    card unlocked
 07h    motorized ejection complete
 08h    ejection requested
 09h    insertion complete
 0Ah    insertion requested
 0Bh    power management: resume
 0Ch    power management: suspend
 0Dh    exclusive access granted
 0Eh    exclusive access requested
 0Fh    perform physical reset
 10h    physical reset requested
 11h    card has been reset
 12h    MTD request (read/write/etc)
 14h    request for client info
 15h    timer has expired
 16h    Socket Service was modified
 17h    write-protected
 18h    attention requested
 40h    card insertion
 80h    reset complete
 81h    erase complete
 82h    registration complete

Format of Card Services Information:
Offset  Size    Description     (Table 00700)
 00h    WORD    length of information record in bytes
 02h    WORD    signature
 04h    WORD    number of sockets
 06h    WORD    revision level
 08h    WORD    Card Services level
 0Ah    WORD    offset of vendor string
 0Ch    WORD    length of vendor string
 0Eh    WORD    number of functions
 10h 255 BYTEs  vendor string
SeeAlso: #00702

Format of Card Services Client structure:
Offset  Size    Description     (Table 00701)
 00h    WORD    PCMCIA socket number
 02h    WORD    client attributes

Format of Cards Services Client Information:
Offset  Size    Description     (Table 00702)
 00h    WORD    maximum length of data in bytes (180)
 02h    WORD    (ret) length of returned data
 04h    WORD    attributes (see #00703)
 06h    WORD    revision level (BCD)
 08h    WORD    Card Services level (BCD)
 0Ah    WORD    revision date (DOS packed date format) (see #01666)
 0Ch    WORD    offset to name
 0Eh    WORD    length of name
 10h    WORD    offset to vendor string
 12h    WORD    length of vendor string
 14h 80 BYTEs   buffer for name
 64h 80 BYTEs   buffer for vendor string
SeeAlso: #00700,#00704

Bitfields for Card Services client attributes:
Bit(s)  Description     (Table 00703)
 0      memory client
 1      MTD client
 2      I/O client
 3      all clients can share this card
 4      only one client can use this card at a time
SeeAlso: #00702

Format of Card Services configuration information:
Offset  Size    Description     (Table 00704)
 00h    WORD    socket (usually 0000h)
 02h    WORD    attributes (see #00705)
 04h    BYTE    Vcc value
 05h    BYTE    Vpp1 value
 06h    BYTE    Vpp2 value
 07h    BYTE    interface type (see #00706)
 08h    DWORD   base address of configuration registers
 0Ch    BYTE    card's Status register setting (if present)
 0Dh    BYTE    card's Pin register setting (if present)
 0Eh    BYTE    card's Socket/Copy register setting (if present)
 0Fh    BYTE    card's Option register setting (if present)
 10h    BYTE    bitmap of present card configuration registers
 11h    BYTE    first device type
 12h    BYTE    function code
 13h    BYTE    SysInit mask
 14h    WORD    manufacturer code
 16h    WORD    manufacturer information
 18h    BYTE    valie card register values
 19h    BYTE    IRQ number assigned to PC Card
 1Ah    WORD    IRQ attributes (see #00708)
 1Ch    WORD    base port address (for I/O range 1)
 1Eh    BYTE    number of contiguous ports (for I/O range 1)
 1Fh    BYTE    bitmap of port attributes (for I/O range 1) (see #00709)
 20h    WORD    base port address (for I/O range 2)
 22h    BYTE    number of contiguous ports (for I/O range 2)
 23h    BYTE    bitmap of port attributes (for I/O range 2) (see #00709)
 24h    BYTE    number of I/O address lines decoded (16-bit PC Card only)
 25h    BYTE    extended status register setting (if present)
 26h    BYTE    bitmap of DMA attributes (see #00710)
                (note: value at call is used to set!)
 27h    BYTE    assigned DMA channel
 28h    BYTE    number of I/O windows in use on logical socket
 29h    BYTE    number of memory windows in use on logical socket
SeeAlso: #00703,#00724

Bitfields for Card Services Configuration attributes:
Bit(s)  Description     (Table 00705)
 0      exclusive
 1      IRQ active
 2      CardBus card
 3-5    reserved (0)
 6      DMA channel is active
 7      reserved (0)
 8      valid client
 9      overwrite voltage value
 10-15  reserved (0)
SeeAlso: #00704

Bitfields for Card Services Configuration interface type:
Bit(s)  Description     (Table 00706)
 0      memory interface
 1      I/O and memory interface
 2      CardBus interface
 3-7    reserved (0)
SeeAlso: #00704

Bitfields for Card Services Configuration registers:
Bit(s)  Description     (Table 00707)
 0      option value is value
 1      status value
 2      pin-replacement value
 3      copy value
 4      extended status value
 5-7    reserved (0)
SeeAlso: #00704

Bitfields for Card Services Configuration IRQ attributes:
Bit(s)  Description     (Table 00708)
 1-0    sharing
        00 no sharing
        01 time-multiplex sharing
        10 dynamic sharing
        11 reserved
 2      force pulse mode
 3      first used together
 4-7    reserved
 8      pulse IRQ has been assigned
 9-15   reserved
SeeAlso: #00704,#00709,#00710,#00715,#00718

Bitfields for Card Services Configuration Port attributes:
Bit(s)  Description     (Table 00709)
 0      shared I/O ports
 1      "CS_FirstCommonUsedCard"
 2      force alias access
 3      =1 sixteen-bit I/O
        =0 eight-bit I/O
 7-4    reserved (0)
SeeAlso: #00704,#00708,#00710,#00717

Bitfields for Card Services Configuration DMA attributes:
Bit(s)  Description     (Table 00710)
 1-0    sharing mode
        00 no sharing
        01 time-multiplex sharing
        10 dynamic sharing
        11 reserved
 3-2    DMA request signal
        00 reserved
        01 DMARQ uses pin SPKR#
        10 DMARQ uses pin IOIS16#
        11 DMARQ uses pin INPACK#
 4      DMA size
        0 eight bits
        1 sixteen bits
 7-5    reserved (0)
SeeAlso: #00704,#00708,#00709

Format of Card Services Tuple information:
Offset  Size    Description     (Table 00711)
 00h    WORD    logical socket number
 02h    WORD    attributes
                bit 0: return Link tuples
 04h    BYTE    code value of desired tuple
 05h    BYTE    reserved (0)
 06h    WORD    (ret) TupleFlags
 08h    DWORD   (ret) -> Card Services Link State Information
 0Ch    DWORD   (ret) -> Card Services CIS State Information
 10h    BYTE    (ret) code for tuple
 11h    BYTE    (ret) link value for tuple
SeeAlso: #00712

Format of Card Services GetTupleData record:
Offset  Size    Description     (Table 00712)
 00h    WORD    logical socket
 02h    WORD    attributes
 04h    BYTE    code value of desired tuple
 05h    BYTE    offset into tuple from link byte
 06h    WORD    flags
 08h    DWORD   -> Link
 0Ch    DWORD   -> CIS
 10h    WORD    (call) maximum amount of data to return (0004h)
 12h    WORD    (ret) amount of data returned
 14h    DWORD   (ret) tuple data
SeeAlso: #00711

Format of Card Services Client Registration record:
Offset  Size    Description     (Table 00713)
 00h    WORD    attributes
 02h    WORD    event mask
 04h    WORD    client data (passed to client event handler in DI)
--- 16-bit code ---
 06h    WORD    client data selector (passed to event handler in DS)
 08h    WORD    client data offset (passed to event handler in SI)
 0Ah    WORD    reserved
--- 32-bit code ---
 06h    WORD    reserved
 08h    DWORD   client data offset (passed to event handler in ESI)
------
 0Ch    WORD    expected Card Services version (0210h for v2.10)

Bitfields for Card Services client event codes:
Bit(s)  Description     (Table 00714)
 0      change in write-protect status
 1      change in card lock
 2      ejection request
 3      insertion request
 4      battery is dead
 5      battery low
 6      change in Ready
 7      change in Card Detect
 8      power management change
 9      reset
 10     Socket Services updated
 11     extended status change
SeeAlso: #00713

Format of Card Services ReleaseIRQ record:
Offset  Size    Description     (Table 00715)
 00h    WORD    logical socket number
 02h    WORD    attributes (see #00708)
 04h    BYTE    assigned IRQ number to be released

Format of Card Services Release Configuration record:
Offset  Size    Description     (Table 00716)
 00h    WORD    logical socket number

Format of Card Services Request I/O record:
Offset  Size    Description     (Table 00717)
 00h    WORD    logical socket number
 02h    WORD    base port 1
 04h    BYTE    size of port range 1
 05h    BYTE    attributes for port range 1 (see #00709)
 06h    WORD    base port 2
 08h    BYTE    size of port range 2
 09h    BYTE    attributes for port range 2 (see #00709)
 0Ah    BYTE    number of address lines (typically 16)
SeeAlso: #00718,#00716

Format of Card Services Request IRQ record:
Offset  Size    Description     (Table 00718)
 00h    WORD    logical socket number
 02h    WORD    attributes (see #00708)
 04h    BYTE    (ret) assigned IRQ number, if successful
 05h    BYTE    IRQ info (see #00719)
 06h    WORD    bitmap of available IRQs (bit 0 = IRQ0, etc.)
                (only if bit 4 of IRQ info set)
SeeAlso: #00717,#00716

Bitfields for Card Services Request IRQ info flags:
Bit(s)  Description     (Table 00719)
 7      IRQ is shared
 6      pulse (edge-triggered) interrupt
 5      level interrupt
 4      use IRQ bitmap
--- bit 4 set ---
 3      vendor-specific interrupt
 2      bus error
 1      I/O check interrupt
 0      NMI
--- bit 4 clear ---
 3-0    IRQ number
SeeAlso: #00718

Format of Card Services Request Window record:
Offset  Size    Description     (Table 00720)
 00h    WORD    logical socket number
 02h    WORD    attributes (see #00721)
 04h    DWORD   system base adress
 08h    DWORD   size of memory window
 0Ch    BYTE    additional info
                if attributes bit ??? is set, this is the address-lines field
                otherwise, this is the access-speed field (see #00722)

Bitfields for Card Services Request Window attributes:
Bit(s)  Description     (Table 00721)
 0      I/O window instead of memory window
 1      attribute memory instead of normal memory (16-bit PC Cards only)
 2      window enabled
 3      16-bit data path instead of 8-bit path (16-bit PC Cards only, v2.10+)
        (ignored if bit 9 set)
 4      size is given in 16K pages (invalid for CardBus PC Cards)
 5      shared (invalid for CardBus)
 6      first shared (invalid for CardBus)
 7      "CS_BindingSpecific" (memory window only)
 8      card offsets are window-size granular (16-bit PC Card memory window)
 9      32-bit data path (CardBus only)
 10     reserved (0)
 12-11  prefetch/cache
        00 neither prefetchable nor cacheable
        01 prefetchable but not cacheable
        10 prefetchable and cachable
        11 reserved
 15-13  decoded base address register number (CardBus only)
SeeAlso: #00720,#00722

Bitfields for Card Services Request Window access-speed:
Bit(s)  Description     (Table 00722)
 6-3    mantissa
        0000 use device speed code
        0001  1.0
        0010  1.2
        0011  1.2 ???
        0100  1.5
        0101  2.0
        0110  2.5
        0111  3.0
        1000  3.5
        1001  4.0
        1010  4.5
        1011  5.0
        1100  5.5
        1101  6.0
        1110  7.0
        1111  8.0
--- if mantissa==0 ---
 2-0    device speed code
        000 reserved
        001 250 ns
        010 200 ns
        011 150 ns
        100 100 ns
        101-111 reserved
--- if mantissa<>0 ---
 2-0    speed exponent
        000     1 ns
        001    10 ns
        010   100 ns
        011     1 us
        100    10 us
        101   100 us
        110     1 ms
        111    10 ms
SeeAlso: #00720,#00721

Format of Card Services Request/Release Exclusive Access record:
Offset  Size    Description     (Table 00723)
 00h    WORD    logical socket number
 02h    WORD    attributes (currently all reserved, must be 0000h)

Format of Card Services Request Configuration record:
Offset  Size    Description     (Table 00724)
 00h    WORD    socket (usually 0000h)
 02h    WORD    attributes (see #00705)
 04h    BYTE    Vcc value
 05h    BYTE    Vpp1 value
 06h    BYTE    Vpp2 value
 07h    BYTE    interface type (see #00706)
 08h    DWORD   base address of configuration registers
 0Ch    BYTE    card's Status register setting (if present)
 0Dh    BYTE    card's Pin register setting (if present)
 0Eh    BYTE    card's Socket/Copy register setting (if present)
 0Fh    BYTE    card's Option register setting (if present)
 10h    BYTE    bitmap of present card configuration registers
 11h    BYTE    extended status register setting (if present)
SeeAlso: #00704
--------X-1AB000-----------------------------
INT 1A U - HP 100LX/200LX - PCMCIA - ???
        AX = B000h
        ES:BX -> parameter block ???
Return: CF clear if ???
        CF set if ???
Note:   called by HP 100LX/200LX PCMCIA client CIC100.EXE
--------d-1AB001CX4D52-----------------------
INT 1A - Microsoft Real-Time Compression Interface (MRCI) - ROM-BASED SERVER
        AX = B001h
        CX = 4D52h ("MR")
        DX = 4349h ("CI")
Return: CX = 4943h ("IC") if installed
        DX = 524Dh ("RM") if installed
            ES:DI -> MRCINFO structure (see #00725)
Note:   this call is functionally identical to INT 2F/AX=4A12h, which should
          be called first, as this call is used for the first, ROM-based
          MRCI server, while the other call is used for RAM-based servers
          which may be partially or entirely replacing a prior server
SeeAlso: INT 2F/AX=4A12h

Format of MRCINFO structure:
Offset  Size    Description     (Table 00725)
 00h  4 BYTEs   vendor signature
                "MSFT" Microsoft
 04h    WORD    server version (high=major)
 06h    WORD    MRCI specification version
 08h    DWORD   address of server entry point (see #00727)
 0Ch    WORD    bit flags: server capabilities (see #00726)
 0Eh    WORD    bit flags: hardware assisted capabilities (see #00726)
 10h    WORD    maximum block size supported by server (at least 8192 bytes)

Bitfields for MRCI capabilities:
Bit(s)  Description     (Table 00726)
 0      standard compress
 1      standard decompress
 2      update compress
 3      MaxCompress (not present in initial public release)
 4      reserved
 5      incremental decompress
 6      MRCI 2.0 standard compress
 7      MRCI 2.0 standard decompress
 8-14   reserved
 15     this structure is in ROM and can't be modified
        (server capabilities only)

(Table 00727)
Call MRCI entry point with:
        DS:SI -> MRCREQUEST structure (see #00728)
        CX = type of client (0000h application, 0001h file system)
        AX = operation
            0001h perform standard compression
            0002h perform standard decompression
            0004h perform update compression
            0008h perform MaxCompress
            0020h perform incremental decompression
            0040h perform MRCI 2.0 standard compression
            0080h perform MRCI 2.0 standard decompression
        AX = FFFFh clear flags
            BX = bitmask of flags to clear (set bits in BX are flags to clear)
Return: AX = status
            0000h successful
            0001h invalid function
            0002h server busy, try again
            0003h destination buffer too small
            0004h incompressible data
            0005h bad compressed data format
        BP destroyed (MS-DOS 6.2)
Note:   MRCI driver may chain to a previous driver

Format of MRCREQUEST structure:
Offset  Size    Description     (Table 00728)
 00h    DWORD   pointer to source buffer
 04h    WORD    size of source buffer (0000h = 64K)
 06h    WORD    (UpdateCompress only)
                (call) offset in source buffer of beginning of changed data
                (ret) offset in destination buffer of beginning of changed
                          compressed data
 08h    DWORD   pointer to destination buffer
                must contain original compressed data for UpdateCompress
 0Ch    WORD    size of destination buffer (0000h = 64K)
                any compression: size of buffer for compressed data
                standard decompression: number of bytes to be decompressed
                incremental decompression: number of byte to decompress now
                (ret) actual size of resulting data
 0Eh    WORD    client compressed data storage allocation size
 10h    DWORD   incremental decompression state data
                set to 00000000h before first incremental decompression call
Notes:  the source and destination buffers may not overlap
        the source and destination buffer sizes should normally be the same
        application should not update the contents of the MRCREQUEST structure
          between incremental decompression calls
--------!---Section--------------------------
Interrupt List, part 5 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------X-1AB101-----------------------------
INT 1A - PCI BIOS v2.0c+ - INSTALLATION CHECK
        AX = B101h
        EDI = 00000000h
Return: AH = 00h if installed
            CF clear
            EDX = 20494350h (' ICP')
            EDI = physical address of protected-mode entry point (see #00731)
            AL = PCI hardware characteristics (see #00730)
            BH = PCI interface level major version (BCD)
            BL = PCI interface level minor version (BCD)
            CL = number of last PCI bus in system
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        some BIOSes do not change EDI, so applications looking for the
          protected-mode entry point should set EDI to 00000000h before
          calling this function
SeeAlso: AX=B181h

(Table 00729)
Values for PCI BIOS v2.0c+ status codes:
 00h    successful
 81h    unsupported function
 83h    bad vendor ID
 86h    device not found
 87h    bad PCI register number

Bitfields for PCI hardware characteristics:
Bit(s)  Description     (Table 00730)
 0      configuration space access mechanism 1 supported
 1      configuration space access mechanism 2 supported
 2-3    reserved
 4      Special Cycle generation mechanism 1 supported
 5      Special Cycle generation mechanism 2 supported
 6-7    reserved

(Table 00731)
Call protected-mode entry point with:
        registers as for real/V86-mode INT call
        CS = ring 0 descriptor with access to full address space
Return: as for real/V86-mode call
--------X-1AB102-----------------------------
INT 1A - PCI BIOS v2.0c+ - FIND PCI DEVICE
        AX = B102h
        CX = device ID (see #00735,#00742,#00743,#00873,#00875)
        DX = vendor ID (see #00732)
        SI = device index (0-n)
Return: CF clear if successful
        CF set on error
        AH = status (00h,83h,86h) (see #00729)
            00h successful
                BH = bus number
                BL = device/function number (bits 7-3 device, bits 2-0 func)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        device ID FFFFh may be reserved as a wildcard in future implementations
        the meanings of BL and BH on return were exchanged between the initial
          drafts of the specification and final implementation
        all devices sharing a single vendor ID and device ID may be enumerated
          by incrementing SI from 0 until error 86h is returned
SeeAlso: AX=B182h

(Table 00732)
Values for PCI vendor ID:
 001Ah  Ascend Communications, Inc.
 003Dh  Martin-Marietta Corporation
 0E11h  Compaq (see #00733)
 1000h  Symbios Logic Inc (formerly NCR) (see #00734)
 1002h  ATI (see #00735)
 1003h  ULSI Systems (see #00736)
 1004h  VLSI Technologies (see #00737)
 1005h  Avance Logics (ADL) (see #00738)
 1006h  Reply Group
 1007h  Netframe Systems Inc.
 1008h  Epson
 100Ah  Phoenix Technologies
 100Bh  National Semiconductor (see #00739)
 100Ch  Tseng Labs (see #00740) (also ID 10BEh)
 100Dh  AST Research
 100Eh  Weitek (see #00741)
 1010h  Video Logic Ltd
 1011h  DEC (see #00742)
 1012h  Micronics Computers
 1013h  Cirrus Logic (see #00743,#00029)
 1014h  IBM (see #00744)
 1015h  LSI Logic Corp. of Canada
 1016h  ICL Personal Systems
 1017h  SPEA Software AG
 1018h  Unisys
 1019h  EliteGroup Computer Sys
 101Ah  NCR/AT&T GIS
 101Bh  Vitesse Semiconductor
 101Ch  Western Digital (see #00745)
 101Eh  AMI (see #00746)
 101Fh  Picturetel
 1020h  Hitachi Computer Electronics
 1021h  Oki Electric Industry
 1022h  Advanced Micro Devices (see #00747)
 1023h  Trident Microsystems (see #00748)
 1024h  Zenith Data Systems
 1025h  Acer
 1028h  Dell Computer Corporation
 1029h  Siemens Nixdorf
 102Ah  LSI Logic, Headland Division (see #00749)
 102Bh  Matrox (see #00750)
 102Ch  Chips & Technologies (see #00751)
 102Dh  Wyse Technologies
 102Eh  Olivetti Advanced Technology
 102Fh  Toshiba America (see #00752)
 1030h  TMC Research
 1031h  Miro Computer Products AG (see #00753)
 1032h  Compaq
 1033h  NEC Corporation (see #00754)
 1034h  Burndy Corporation
 1035h  Computers and Communications Research Lab
 1036h  Future Domain (see #00755)
 1037h  Hitachi Micro Systems
 1038h  AMP Incorporated
 1039h  Silicon Integrated System (SIS) (see #00756)
 103Ah  Seiko Epson Corporation
 103Bh  Tatung Corp. of America
 103Ch  Hewlett-Packard (see #00757)
 103Eh  Solliday
 103Fh  Logic Modeling
 1040h  Kubota Pacific
 1041h  Computrend
 1042h  PC Technology (see #00758,#00928) (see also PORT 03F0h"PCTech")
 1043h  Asustek
 1044h  Distributed Processing Technology (DPT) (see #00759)
 1045h  OPTi (see #00760)
 1046h  IPC Corporation, Ltd.
 1047h  Genoa Systems Corp.
 1048h  Elsa GmbH
 1049h  Fountain Technology
 104Ah  SGS Thomson Microelectric (see #00761)
 104Bh  BusLogic (see #00762)
 104Ch  Texas Instruments (see #00763)
 104Dh  Sony Corporation
 104Eh  Oak Technology (see #00764)
 104Fh  Co-Time Computer Ltd.
 1050h  Winbond (see #00765)
 1051h  Anigma Corp.
 1052h  Young Micro Systems
 1054h  Hitachi, Ltd. (see #00766)
 1055h  EFAR Microsystems (see #00767)
 1056h  ICL
 1057h  Motorola (see #00768)
 1058h  Electronics and Telecommunications Research
 1059h  Teknor Microsystems
 105Ah  Promise Technology (see #00769)
 105Bh  Foxconn International
 105Ch  Wipro Infotech Ltd.
 105Dh  Number 9 Computer Company (see #00770)
 105Eh  VTech Engineering Canada, Ltd.
 105Fh  Infotronic America, Inc.
 1060h  United Microelectronics (UMC) (see #00771)
 1061h  8x8 (X Tech) (see #00772)
 1062h  Maspar Computer Copr.
 1063h  Ocean Office Automation
 1064h  Alcatel Cit
 1065h  Texas Microsystems
 1066h  PicoPower Technology (see #00773)
 1067h  Mitsubishi Electronics
 1068h  Diversified Technology
 1069h  Mylex Corporation (see #00774)
 106Ah  Aten Research
 106Bh  Apple Computer
 106Ch  Hyundai Electronics America
 106Dh  Sequent
 106Eh  DFI Inc.
 106Fh  City Gate Development, Ltd.
 1070h  Daewoo Telecom Ltd.
 1071h  Mitac
 1072h  GIT Co., Ltd.
 1073h  Yamaha Corporation (see #00775)
 1074h  NexGen Microsystems (see #00776)
 1075h  Advanced Integration Research
 1076h  Chaintech Computer Co. Ltd.
 1077h  Q Logic (see #00777)
 1078h  Cyrix Corporation
 1079h  I-Bus
 107Ah  Networth
 107Bh  Gateway 2000
 107Ch  Goldstar Co. Ltd.
 107Dh  Leadtek Research (see #00778)
 107Eh  Interphase Corporation (see #00779)
 107Fh  Data Technology Corporation (DTC) (see #00780)
 1080h  Contaq Microsystems (see #00781)
 1081h  Supermac Technology
 1082h  EFA Corporation of America
 1083h  Forex Computer Corporation (see #00782)
 1084h  Parador
 1085h  Tulip Computers Int'l BV
 1086h  J. Bond Computer Systems
 1087h  Cache Computer
 1088h  Microcomputer Systems (M) Son
 1089h  Data General Corporation
 108Ah  Bit3 Computer (see #00783)
 108Ch  Elonex PLC (Oakleigh Systems, Inc)
 108Dh  Olicom (see #00784)
 108Eh  Sun Microsystems
 108Fh  Systemsoft Corporation
 1090h  Encore Computer Corporation
 1091h  Intergraph Corporation (see #00785)
 1092h  Diamond Computer Systems
 1093h  National Instruments (see #00786)
 1094h  First International Computers (FIC)
 1095h  CMD Technology, Inc. (see #00787)
 1096h  Alacron
 1097h  Appian Technology (see #00788)
 1098h  Vision / Quantum Designs Ltd (see #00789)
 1099h  Samsung Electronics Co. Ltd.
 109Ah  Packard Bell
 109Bh  Gemlight Computer Ltd.
 109Ch  Megachips Corporation
 109Dh  Zida Technologies
 109Eh  Brooktree Corporation (see #00790)
 109Fh  Trigem Computer Inc.
 10A0h  Meidensha Corporation
 10A1h  Juko Electronics Inc. Ltd.
 10A2h  Quantum Corporation
 10A3h  Everex Systems Inc.
 10A4h  Globe Manufacturing Sales
 10A5h  Racal Interlan
 10A6h  Informtech Industrial Ltd.
 10A7h  Benchmarq Microelectronics
 10A8h  Sierra Semiconductor (see #00791)
 10A9h  Silicon Graphics
 10AAh  ACC Microelectronics (see #00792)
 10ABh  Digicom
 10ACh  Honeywell IASD
 10ADh  Symphony Labs (see #00793)
 10AEh  Cornerstone Technology
 10AFh  Microcomputer Systems
 10B0h  CardExpert Technology
 10B1h  Cabletron Systems, Inc.
 10B2h  Raytheon Company
 10B3h  Databook Inc
 10B4h  STB Systems
 10B5h  PLX Technology (see #00794)
 10B6h  Madge Networks (see #00795)
 10B7h  3com Corporation (see #00796)
 10B8h  Standard Microsystems Corporation (SMC) (see #00797)
 10B9h  Acer Labs Inc. (see #00798)
 10BAh  Mitsubishi Electronics Corp.
 10BBh  Dapha Electronics Corporation
 10BCh  Advanced Logic Research Inc. (ALR)
 10BDh  Surecom Technology (see #00799)
 10BEh  Tseng Labs International Corp. (see #00740)
 10BFh  Most Inc.
 10C0h  Boca Research Inc.
 10C1h  ICM Corp. Ltd.
 10C2h  Auspex Systems Inc.
 10C3h  Samsung Semiconductors
 10C4h  Award Software International Inc.
 10C5h  Xerox Corporation
 10C6h  Rambus Inc.
 10C7h  Media Vision
 10C8h  Neomagic Corporation (see #00800)
 10C9h  DataExpert Corporation
 10CAh  Fujitsu
 10CBh  Omron Corporation
 10CCh  Mentor Arc Inc.
 10CDh  Advanced System Products (see #00801)
 10CEh  Radius Inc.
 10CFh  Citicorp TTI (see #00802)
 10D0h  Fujitsu Limited
 10D1h  Future+ Systems
 10D2h  Molex Incorporated
 10D3h  Jabil Circuit Inc.
 10D4h  Hualon Microelectronics
 10D5h  Autologic Inc.
 10D6h  Cetia
 10D7h  BCM Advanced Research
 10D8h  Advanced Peripherals Labs
 10D9h  Macronix International Co. Ltd
 10DAh  Thomas-Conrad Corporation
 10DBh  Rohm Research
 10DCh  CERN/ECP/EDU (see #00803)
 10DDh  Evans & Sutherland (see #00804)
 10DEh  NVIDIA Corporation
 10DFh  Emulex Corporation (see #00805)
 10E0h  Integrated Micro Solutions (IMS) (see #00806)
 10E1h  TekRAM Technology Corporation Ltd. (see #00807)
 10E2h  Aptix Corporation
 10E3h  Newbridge Microsystems (see #00808)
 10E4h  Tandem Computers
 10E5h  Micro Industries
 10E6h  Gainbery Computer Products Inc.
 10E7h  Vadem
 10E8h  Applied Micro Circuits Corp. (see #00809)
 10E9h  Alps Electronic Corp. Ltd.
 10EAh  Integraphics Systems (see #00810)
 10EBh  Artist Graphics (see #00811)
 10ECh  Realtek Semiconductor (see #00812)
 10EDh  ASCII Corporation (see #00813)
 10EEh  Xilinx Corporation
 10EFh  Racore Computer Products
 10F0h  Peritek Corporation
 10F1h  Tyan Computer
 10F2h  Achme Computer Inc.
 10F3h  Alaris Inc.
 10F4h  S-MOS Systems
 10F5h  NKK Corporation (see #00814)
 10F6h  Creative Electronic Systems SA
 10F7h  Matsushita Electric Industrial Corp. Ltd.
 10F8h  Altos India Ltd.
 10F9h  PC Direct
 10FAh  Truevision (see #00815)
 10FBh  Thesys Ges. f�r Microelektronik mbH
 10FCh  I/O Data Device Inc.
 10FDh  Soyo Technology Corp. Ltd.
 10FEh  Fast Electronic GmbH
 10FFh  N-Cube
 1100h  Jazz Multimedia
 1101h  Initio Corporation (see #00816)
 1102h  Creative Labs
 1103h  Triones Technologies Inc.
 1104h  Rasterops
 1105h  Sigma Designs, Inc.
 1106h  VIA Technologies (see #00817)
 1107h  Stratus Computer
 1108h  Proteon Inc. (see #00818)
 1109h  Cogent Data Technologies (see #00819)
 110Ah  Siemens AG / Siemens Nixdorf AG (see #00820)
 110Bh  Xenon Microsystems / Chromatic Research, Inc.
 110Ch  Mini-Max Technology Inc.
 110Dh  ZNyX Corporation
 110Eh  CPU Technology
 110Fh  Ross Technology
 1110h  Powerhouse Systems
 1111h  Santa Cruz Operation (SCO)
 1112h  Rockwell / RNS division of Meret Communications Inc. (see #00821)
 1113h  Accton Technology Corporation
 1114h  Atmel Corporation
 1115h  DuPont Pixel Systems
 1116h  Data Translation / Media 100, Inc.
 1117h  Datacube Inc. (see #00822)
 1118h  Berg Electronics
 1119h  Vortex Computersysteme GmbH (see #00823)
 111Ah  Efficient Networks, Inc. (see #00824)
 111Bh  Teledyne Electronic Systems
 111Ch  Tricord Systems, Inc.
 111Dh  Integrated Device Technology
 111Eh  Eldec Corporation
 111Fh  Precision Digital Images
 1120h  EMC Corporation
 1121h  Zilog
 1122h  Multi-tech Systems, Inc.
 1123h  Excellent Design, Inc.
 1124h  Leutron Vision AG
 1125h  Eurocore
 1126h  Vigra
 1127h  FORE Systems (see #00825)
 1128h  ???
 1129h  Firmworks
 112Ah  Hermes Electronics Co.
 112Bh  Linotype - Hell AG
 112Dh  Ravicad
 112Eh  Infomedia MicroElectronics Inc (see #00826)
 112Fh  Imaging Technology (see #00827)
 1130h  Computervision
 1131h  Philips Semiconductors
 1132h  Mitel Corp
 1133h  Eicon Technology Corporation
 1134h  Mercury Computer Systems Inc (see #00828)
 1135h  Fuji Xerox Co Ltd (see #00829)
 1136h  Momentum Data Systems
 1137h  Cisco Systems Inc
 1138h  Ziatech Corporation (see #00830)
 1139h  Dynamic Pictures Inc (see #00831)
 113Ah  FWB Inc
 113Ch  Cyclone Microsystems (PLX) (see #00832)
 113Dh  Leading Edge Products Inc
 113Eh  Sanyo Electric Co. - Computer Engineering Dept.
 113Fh  Equinox Systems
 1140h  Intervoice Inc
 1141h  Crest Microsystem Inc (see #00833)
 1142h  Alliance Semiconductor Corp (see #00834)
 1143h  Netpower, Inc.
 1144h  Cincinnati Milacron / Vickers Inc. Electronic Systems (see #00835)
 1145h  Workbit Corp
 1146h  Force Computers
 1147h  Interface Corp.
 1148h  Schneider & Koch Co. / Syskonnect (see #00836)
 1149h  Win System Corporation
 114Ah  VMIC (see #00837)
 114Bh  Canopus Co.
 114Ch  Annabooks
 114Dh  IC Corporation
 114Eh  Nikon Systems Inc
 114Fh  Digi International / Stargate (see #00838)
 1150h  Thinking Machines Corp.
 1151h  JAE Electronics Inc.
 1152h  Megatek
 1153h  Land Win Electronic Corp.
 1154h  Melco Inc.
 1155h  Pine Technology Ltd.
 1156h  Periscope Engineering
 1157h  Avsys Corporation
 1158h  Voarx R&D Inc. (see #00839)
 1159h  MuTech (see #00840)
 115Ah  Harleguin Ltd.
 115Bh  Parallax Graphics
 115Ch  Photron, Ltd.
 115Dh  Xircom
 115Eh  Peer Protocols Inc.
 115Fh  ???
 1160h  Megasoft Inc.
 1161h  PFU Ltd. (see #00841)
 1162h  OA Laboratory Co Ltd.
 1163h  Creative Labs / Rendition (see #00842)
 1164h  Advanced Peripherals Tech
 1165h  Imagraph Corporation (see #00843)
 1166h  Pequr Technology Inc. / Relience Computer
 1167h  Mutoh Industries, Inc.
 1168h  Thine Electronics Inc
 1169h  Centre for Development of Advanced Computing
 116Ah  Polaris Communications
 116Bh  Connectware Inc
 116Ch  ???
 116Dh  ???
 116Eh  ???
 116Fh  Workstation Technology
 1170h  Inventec Corporation
 1171h  Loughborough Sound Images
 1172h  Altera Corporation
 1173h  Adobe Systems
 1174h  Bridgeport Machines
 1175h  Mitron Computer Inc.
 1176h  SBE
 1177h  Silicon Engineering
 1178h  Alfa Inc (see #00844)
 1179h  Toshiba America Info Systems
 117Ah  A-Trend Technology
 117Bh  LG Electronics Inc.
 117Ch  Atto Technology
 117Dh  ???
 117Eh  T/R Systems
 117Fh  ???
 1180h  Ricoh Co Ltd
 1181h  Telmatics International
 1182h  ???
 1183h  Fujikura Ltd
 1184h  Forks Inc
 1185h  Dataworld
 1186h  D-Link System Inc
 1187h  Advanced Technology Laboratories
 1188h  Shima Seiki Manufacturing Ltd.
 1189h  Matsushita Electronics (see #00845)
 118Ah  Hilevel Technology
 118Bh  ???
 118Ch  Corollary Inc (see #00846)
 118Dh  BitFlow Inc (see #00847)
 118Eh  Hermstedt GmbH
 118Fh  ???
 1190h  ???
 1191h  Artop Electric / Acard Technology Corp. (see #00848)
 1192h  Densan Co. Ltd
 1193h  Zeitnet Inc. (see #00849)
 1194h  Toucan Technology
 1195h  Ratoc System Inc
 1196h  Hytec Electronics Ltd
 1197h  Gage Applied Sciences Inc.
 1198h  Lambda Systems Inc
 1199h  Digital Communications Associates Inc,
 119Ah  Mind Share Inc.
 119Bh  Omega Micro Inc.
 119Ch  Information Technology Inst.
 119Dh  Bug Sapporo Japan
 119Eh  Fujitsu
 119Fh  Bull Hn Information Systems
 11A0h  Convex Computer Corporation
 11A1h  Hamamatsu Photonics K.K.
 11A2h  Sierra Research and Technology
 11A3h  Deuretzbacher GmbH & Co. Eng. KG
 11A4h  Barco
 11A5h  MicroUnity Systems Engineering, Inc.
 11A6h  Pure Data
 11A7h  Power Computing Corp.
 11A9h  InnoSys Inc. (see #00850)
 11AAh  Actel
 11ABh  Galileo Technology Ltd. (see #00851)
 11ACh  Canon Information Systems
 11ADh  Lite-On Communications Inc
 11AEh  Scitex Corporation Ltd
 11AFh  Pro-Log Corporation / Avid Technology Corp.
 11B0h  V3 Semiconductor Inc. (see #00852)
 11B1h  Apricot Computers
 11B2h  Eastman Kodak
 11B3h  Barr Systems Inc.
 11B4h  Leitch Technology International
 11B5h  Radstone Technology Plc
 11B6h  United Video Corp
 11B7h  Motorola
 11B8h  Xpoint Technologies Inc
 11B9h  Pathlight Technology Inc. (see #00853)
 11BAh  Videotron Corp
 11BBh  Pyramid Technology
 11BCh  Network Peripherals Inc
 11BDh  Pinnacle Systems Inc.
 11BEh  International Microcircuits Inc
 11BFh  Astrodesign, Inc.
 11C3h  NEC Corporation
 11C4h  Document Technologies Ind.
 11C5h  Shiva Corporatin
 11C6h  Dainippon Screen Mfg. Co., Ltd.
 11C7h  D.C.M. Data Systems
 11C8h  Dolphin Interconnect Solutions (see #00854)
 11C9h  MAGMA
 11CAh  LSI Systems Inc
 11CBh  Specialix International, Ltd. (see #00855)
 11CCh  Michels & Kleberhoff Computer GmbH
 11CDh  HAL Computer Systems Inc.
 11CEh  Netaccess
 11D0h  Lockheed Martin Federal Systems-Manassas
 11D2h  Intercom, Inc.
 11D4h  Analog Devices
 11D5h  Ikon Corp.
 11D9h  TEC Corp.
 11DAh  Novell
 11DBh  Sega Enterprises, Ltd.
 11DEh  Zoran Corporation
 11DFh  New Wave PDG
 11E0h  ???
 11E1h  GEC Plessey Semi Inc.
 11E2h  Samsung Information Systems Americ
 11E3h  Quicklogic Corporation
 11E4h  Second Wave Inc.
 11E5h  IIX Consulting
 11E6h  Mitsui-Zosen System Research
 11E7h  ???
 11E8h  Digital Processing Systems Inc.
 11E9h  ???
 11EAh  Elsag Bailey
 11EBh  Formation Inc.
 11ECh  Coreco Inc.
 11EDh  Mediamatics
 11EEh  Dome Imaging Systems Inc.
 11EFh  Nicolet Technologies B.V.
 11F0h  Compu-Shack GmbH
 11F1h  Symbios Logic Inc.
 11F2h  Picture Tel Japan K.K.
 11F3h  Keithley Metrabyte
 11F4h  Kinetic Systems Corporation
 11F5h  Computing Devices International
 11F6h  Powermatic Data Systems Ltd.
 11F6h  Compex USA, Inc. (see #00856)
 11F7h  Scientific Atlanta
 11F8h  PMC-Sierra Inc. (see #00857)
 11F9h  I-Cube, Inc.
 11FEh  RP ??? (see #00858)
 1201h  Vista Controls Corp.
 1203h  Bayer Corp., AGFA division
 1204h  Lattice Semiconductor Corp.
 1205h  Array Corp.
 1206h  Amdahl Corp.
 120Eh  Cyclades (see #00859)
 1216h  PURUP Eskofot A/S
 1217h  O2Micro, Inc.
 121Ah  3DFX Interactive, Inc.
 121Bh  Advanced Telecomm Modules
 1220h  Ariel Corporation (see #00860)
 1221h  Contec Co., Ltd.
 1222h  Ancor Communications, Inc.
 1223h  Heurikon/Computer Products
 1224h  Interactive Images
 1225h  Power I/O, Inc.
 1226h  ???
 1227h  Tech-Source
 1228h  Norsk Elektro Optikk A/S
 1229h  Data Kinesis Inc.
 122Ah  Integrated Telecom
 122Bh  LG Industrial Systems Co. Ltd.
 122Ch  Sican GmbH
 122Dh  Aztech Systems Ltd
 122Eh  Xyratex
 122Fh  Andrew Corporation
 1230h  Fishcamp Engineering
 1231h  Woodward McCoach, Inc.
 1232h  GPT Limited
 1233h  Bus-Tech, Inc.
 1234h  Technical Corp.
 1235h  Risq Modular Systems, Inc. / Smart Modular Technologies, Inc.
 1236h  Sigma Designs Corporation
 1237h  Alta Technology Corporation
 1238h  Adtran
 1239h  The 3DO Company
 123Ah  Visicom Laboratories, Inc.
 123Bh  Seeq Technology, Inc.
 123Ch  Century Systems, Inc.
 123Dh  Engineering Design Team, Inc.
 123Eh  Sumutech, Inc.
 123Fh  C-Cube Microsystems
 1240h  Marathon Technologies Corp.
 1241h  DSC Communications
 1242h  (unknown vendor)
 1243h  Delphax
 1244h  AVM Audiovisuelles Mktg & Computer GmbH
 1245h  A.P.D., S.A.
 1246h  Dipix Technologies, Inc.
 1247h  Xylon Research, Inc.
 1248h  Central Data Corporation
 1249h  Samsung Electronics Co., Ltd.
 124Ah  AEG Electrocom GmbH
 124Bh  SBS/Greenspring Modular I/O
 124Ch  Solitron Technologies, Inc.
 124Dh  Stallion Technologies
 124Eh  Cylink
 124Fh  Infortrend Technology, Inc.
 1250h  Hitachi Microcomputer System, Ltd.
 1251h  VLSI Solution Oy
 1252h  ???
 1253h  Guzik Technical Enterprises
 1254h  Linear Systems Ltd.
 1255h  Optibase Ltd.
 1256h  Perceptive Solutions, Inc.
 1257h  Vertex Networks, Inc.
 1258h  Gilbarco, Inc.
 1259h  Allied telesyn International
 125Ah  ABB Power Systems
 125Bh  Asix Electronics Corporation
 125Ch  Aurora Technologies, Inc.
 125Dh  ESS Technology
 125Eh  SpecialVideo Engineering SRL
 125Fh  Concurrent Technologies, Inc.
 1260h  Harris Semiconductor (see #00861)
 1261h  Matsushita-Kotobuki Electronics Industries
 1262h  ES Computer Company, Ltd.
 1263h  Sonic Solutions
 1264h  Aval Nagasaki Corporation
 1265h  Casio Computer Co., Ltd.
 1266h  Microdyne Corporation
 1267h  S.A. Telecommunications
 1268h  Tektronix
 1269h  Thomson-CSF/TTM
 126Ah  Lexmark International, Inc.
 126Bh  Adax, Inc.
 126Ch  Northern Telecom
 126Dh  Splash Technology, Inc.
 126Eh  Sumitomo Metal Industries, Ltd.
 126Fh  Silicon Motion, Inc.
 1270h  Olympus Optical Co., Ltd.
 1271h  GW Instruments
 1272h  Telematics International
 1273h  Hughes Network Systems
 1274h  Ensoniq (see #00862)
 1275h  Network Appliance Corporation
 1276h  Switched Network Tecnologies, Inc.
 1277h  Comstream
 1278h  Transtech Parallel Systems Ltd.
 1279h  Transmeta Corporation
 127Ah  Rockwell Semiconductor Systems
 127Bh  Pixera Corporation
 127Ch  Crosspoint Solutions, Inc.
 127Dh  Vela Research
 127Eh  Winnov, L.P.
 127Fh  Fujifilm
 1280h  Photoscript Group Ltd.
 1281h  Yokogawa Electric Corporation
 1282h  Davicom Semiconductor, Inc.
 1283h  Integrated Technology Express, Inc.
 1284h  Sahara Networks, Inc.
 1285h  Platform Technologies, Inc.
 1286h  Mazet GmbH
 1287h  M-Pact, Inc. / Luxsonor, Inc.
 1288h  Timestep Corporation
 1289h  AVC Technology, Inc.
 128Ah  Asante Technologies, Inc.
 128Bh  Transwitch Corporation
 128Ch  Retix Corporation / Sonoma Systems, Inc.
 128Dh  G2 Networks, Inc.
 128Ch  Retix Corp
 128Dh  ???
 128Eh  Samho Multi Tech Ltd. / Hoon Tech Co., Ltd.
 128Fh  Tateno Dennou, Inc.
 1290h  Sord Computer Corporation
 1291h  NCS Computer Italia
 1292h  Tritech Microelectronics, Inc.
 1293h  Media Reality Technology
 1294h  Rhetorex, Inc.
 1295h  Imagenation Corporation
 1296h  Kofax Image Products
 1297h  Holco Ent Co, Ltd / Shuttle Computer
 1298h  Spellcaster Telecommunications Inc.
 1299h  Knowledge Technology Lab.
 129Ah  VMetro, Inc.
 129Bh  Image Access
 129Ch  Jaycor / Xantel Corporation
 129Dh  Compcore Multimedia, Inc.
 129Eh  Victor Company of Japan, Ltd.
 129Fh  OEC Medical Systems, Inc.
 12A0h  Allen-Bradley Company
 12A1h  Simpact Associates, Inc.
 12A2h  Newgen Systems Corporation
 12A3h  Lucent Technologies
 12A4h  NTT Electronics Technology Company
 12A5h  Vision Dynamics Ltd.
 12A6h  Scalable Networks, Inc.
 12A7h  AMO GmbH
 12A8h  News Datacom
 12A9h  Xiotech Corporation
 12AAh  SDL Communications, Inc.
 12ABh  Yuan Yuan Enterprise Co., Ltd.
 12ACh  MeasureX Corporation
 12ADh  Multidata GmbH
 12AEh  Alteon Networks, inc.
 12AFh  TDK USA Corporation
 12B0h  Jorge Scientific Corporation
 12B1h  GammaLink
 12B2h  General Signal Networks
 12B3h  Inter-Face Co. Ltd.
 12B4h  FutureTel Inc.
 12B5h  Granite Systems Inc.
 12B6h  Natural Microsystems
 12B7h  Acumen
 12B8h  Korg
 12B9h  US Robotics / 3com Corporation
 12BAh  PMC Sierra
 12BBh  Nippon Unisoft Corporation
 12BCh  Array Microsystems
 12BDh  Computerm Corp.
 12BEh  Anchor Chips
 12BFh  Fujifilm Microdevices
 12C0h  InfiMed
 12C1h  GMM Research Corp.
 12C2h  Mentec Limited
 12C3h  Holtek Microelectronics Inc.
 12C4h  Connect Tech Inc.
 12C5h  Picture Elements, Inc. (see #00863)
 12C6h  Mitani Corporation
 12C7h  Dialogic Corporation
 12C8h  G Force Co, Ltd.
 12C9h  Gigi Operations
 12CAh  Integrated Computing Engines
 12CBh  Antex Electronics Corporation
 12CCh  Pluto Technologies International
 12CDh  Aims Lab
 12CEh  Netspeed, Inc.
 12CFh  Prophet Systems, Inc.
 12D0h  GDE Systems, Inc.
 12D1h  Psitech
 12D2h  NVIDIA / SGS Thomson
 12D3h  Vingmed Sound A/S
 12D4h  DGM&S
 12D5h  Equator Technologies
 12D6h  Analogic Corporation
 12D7h  Biotronic SRL
 12D8h  Pericom Semiconductor
 12D9h  Aculab PLC
 12DAh  True Time
 12DBh  Annapolis Micro Systems, Inc.
 12DCh  Symicron Computer Communication Ltd.
 12DDh  Management Graphics
 12DEh  Rainbow Technologies
 12DFh  SBS Technologies Inc.
 12E0h  Chase Research
 12E1h  Nintendo Co, Ltd.
 12E2h  Datum Inc, Bancomm-Timing Division
 12E3h  Imation Corp - Medical Imaging Systems
 12E4h  Brooktrout Technology Inc.
 12E5h  Apex Inc / XCD Inc.
 12E6h  Cirel Systems
 12E7h  Sunsgroup Corporation / Sebring Systems
 12E8h  CRISC Corporation
 12E9h  GE Spacenet
 12EAh  Zuken / Real Vision, Inc.
 12EBh  Aureal Semiconductor
 12ECh  3A International, Inc.
 12EDh  Optivision Inc.
 12EEh  Orange Micro
 12EFh  Vienna Systems
 12F0h  Pentek
 12F1h  Sorenson Vision Inc.
 12F2h  GammaGraphx, Inc.
 12F3h  XING, Inc.
 12F4h  Megatel
 12F5h  Forks
 12F6h  Dawson France
 12F7h  Cognex
 12F8h  Electronic-Design GmbH
 12F9h  FourFold Technologies
 12FBh  Spectrum Signal Processing
 12FCh  Capital Equipment Corp.
 12FDh  i2S
 12FEh  ESD Electronic System Design GmbH
 12FFh  Lexicon
 1300h  Harman International Industries, Inc.
 1302h  Computer Sciences Corp.
 1303h  Innovative Integration
 1304h  Juniper Networks
 1305h  NetPhone, Inc.
 1306h  Duet Technologies
 1307h  Computer Boards
 1308h  Jato Technologies, Inc.
 1309h  AB Semicon, Ltd.
 130Ah  Mitsubishi Electric MicroComputer
 130Bh  Colorgraphic Communications Corp.
 130Ch  AMBEX Technologies, Inc.
 130Dh  Accelerix, Inc.
 130Eh  Yamatake-Honeywell Co., Ltd.
 130Fh  Advanet, Inc.
 1310h  GESPAC
 1311h  VideoServer, Inc.
 1312h  Acuity Imaging, Inc.
 1313h  Yaskawa Electric Co.
 1316h  Teradyne, Inc.
 1317h  Bridgecom, Inc.
 1318h  Packet Engines, Inc.
 1319h  ForteMedia, Inc.
 131Ah  Finisar Corp.
 131Ch  Nippon Electro-Sensory Devices Corp.
 131Dh  Sysmic, Inc.
 131Eh  Xinex Networks, Inc.
 131Fh  SIIG, Inc.
 1320h  Crypto AG
 1321h  Arcobel Graphics BV
 1322h  MTT Co., Ltd.
 1323h  DOME, Inc.
 1324h  Sphere Communications
 1325h  Salix Technologies, Inc.
 1326h  SeaChange International
 1327h  Voss Scientific
 1328h  Quadrant International
 1329h  Productivity Enhancement
 132Ah  Microcom, Inc.
 132Bh  BroadBand Technologies
 132Ch  Micrel, Inc.
 132Dh  Integrated Silicon Solution, Inc.
 1330h  MMC Networks
 1331h  RadiSys Corporation
 1332h  Micro Memory
 1333h  ???
 1334h  Redcreek Communications, Inc.
 1335h  Videomail, Inc.
 1336h  ???
 1337h  Third Planet Publishing
 1338h  BT Electronics
 133Ah  VTEL Corp.
 133Bh  Softcom Microsystems
 133Ch  Holontech Corp.
 133Dh  S S Technologies
 133Eh  Virtual Computer Corp.
 133Fh  SCM Microsystems
 1340h  Atalla Corp.
 1341h  Kyoto Microcomputer Co.
 1342h  Promax Systems Inc.
 1343h  Phylon Communications, Inc.
 1344h  Crucial Technology
 1345h  Arescom, Inc.
 1346h  ???
 1347h  Odetics
 1348h  ???
 1349h  Sumitomo Electric Industries, Ltd.
 134Ah  DTC Technology Corp.
 134Bh  Ark Research Corp.
 134Ch  Chori Joho System Co., Ltd.
 134Dh  Pctel, Inc.
 134Eh  CSTI
 134Fh  Algo System Co., Ltd.
 1350h  Systec Co., Ltd.
 1351h  Sonix, Inc.
 1353h  Dassault A.T.
 1354h  dWave System, Inc.
 1355h  Kratos Analytical, Ltd.
 1356h  The Logical Co.
 1359h  Prisa Networks
 135Ah  Brain Boxes
 135Bh  Giganet, Inc.
 135Ch  Quatech, Inc.
 135Dh  ABB Network Partner AB
 135Eh  Sealevel Systems, Inc.
 135Fh  I-Data International A-S
 1360h  Meinberg Funkuhren
 1361h  Soliton Systems K.K.
 1362h  Fujifacom Corp.
 1363h  Phoenix Technology, Ltd.
 1364h  ATM Communications, Inc.
 1365h  Hypercope Corp.
 1366h  Teijin Seiki Co., Ltd.
 1367h  Hitachi Zosen Corp.
 1368h  Skyware Corp.
 1369h  Digigram
 136Ah  High Soft Tech
 136Bh  Kawasaki Steel Corp.
 136Ch  Adtek System Science Co., Ltd.
 136Dh  Gigalabs, Ltd.
 136Fh  Applied Magic, Inc.
 1370h  ATL Products
 1371h  CNET Technology, Inc.
 1373h  Silicon Vision, Inc.
 1374h  Silicom, Ltd.
 1375h  Argosystems, Inc.
 1376h  LMC
 1377h  Electronic Equipment Production
 1378h  Telemann Co., Ltd.
 1379h  Asahi Kasei Microsystems Co., Ltd.
 137Ah  Mark Of The Unicorn, Inc.
 137Bh  PPT Vision
 137Ch  Iwatsu Electric Co., Ltd.
 137Dh  Dynachip Corp.
 137Eh  Patriot Scientific Corp.
 137Fh  Japan Satellite Systems, Inc.
 1380h  Sanritz Automation Co., Ltd.
 1381h  Brains Co., Ltd.
 1382h  Marian - Electronic & Software
 1383h  Controlnet, Inc.
 1384h  Reality Simulation Systems, Inc.
 1385h  Netgear
 1386h  Video Domain Technologies
 1387h  Systran Corp.
 1388h  Hitachi Information Technology Co., Ltd.
 1389h  Applicom International
 138Ah  Fusion Micromedia Corp.
 138Bh  Tokimec, Inc.
 138Ch  Silicon Reality
 138Dh  Future Techno Designs Pte., Ltd.
 138Eh  Basler GmbH
 138Fh  Patapsco Designs, Inc.
 1390h  Concept Development, Inc.
 1391h  Development Concepts, Inc.
 1392h  Medialight, Inc.
 1394h  Level One Communications
 1395h  Ambicom, Inc.
 1396h  Cipher Systems, Inc.
 1397h  Cologne Chip Designs GmbH
 1398h  Clarion Co., Ltd.
 1399h  Rios Systems Co., Ltd.
 139Ah  Alacritech, Inc.
 139Bh  Mediasonic Multimedia Systems, Ltd.
 139Ch  Quantum 3D, Inc.
 139Dh  EPL, Ltd.
 139Eh  Media4
 139Fh  Aethra S.R.L.
 13A0h  Crystal Group, Inc.
 13A1h  Kawasaki Heavy Industries, Ltd.
 13A2h  Ositech Communications, Inc.
 13A3h  HI-FN
 13A4h  Rascom, Inc.
 13A5h  Audio Digital Imaging, Inc.
 13A6h  Videonics, Inc.
 13A7h  Teles AG
 13A8h  Exar Corp.
 13A9h  Ultrasound Group
 13AAh  Broadband Networks, Inc.
 13ABh  Arcom Control Systems, Ltd.
 13ACh  Motion Media Technology, Ltd.
 13ADh  Nexus, Inc.
 13AEh  ALD Technology, Ltd.
 13AFh  T.Sqware
 13B0h  Maxspeed Corp.
 13B1h  Tamura Corp.
 13B2h  Techno Chips Co., Ltd.
 13B3h  Lanart Corp.
 13B4h  Wellbean Co, Inc.
 13B5h  ARM
 13B6h  DLoG GmbH
 13B7h  LOGIC Devices, Inc.
 13B8h  Nokia Telecommunications Oy
 13B9h  Elecom Co., Ltd.
 13BAh  Oxford Instruments
 13BBh  Sanyo Technosound Co., Ltd.
 13BCh  Bitran Corp.
 13BDh  Sharp Corp.
 13BEh  Miroku Jyoho Service Co., Ltd.
 13BFh  Sharewave., Inc.
 13C0h  Microgate Corp.
 13C1h  3ware Inc.
 13C2h  Technotrend Systemtechnik GmbH
 13C3h  Janz Computer AG
 13C4h  Phase Metrics
 13C5h  Alphi Technology Corp.
 13C6h  Condor Engineering, Inc.
 13C7h  Blue Chip Technology, Ltd.
 13C8h  Apptech, Inc.
 13C9h  Eaton Corp.
 13CAh  IOMEGA Corp.
 13CBh  Yano Electric Co., Ltd.
 13CCh  Metheus Corp.
 13CDh  Compatible Systems Corp.
 13CEh  Cocom A/S
 13CFh  Studio Audio & Video, Ltd.
 13D0h  Techsan Electronics Co., Ltd.
 13D1h  Abocom Systems, Inc.
 13D2h  Shark Multimedia, Inc.
 13D3h  IMC Networks
 13D4h  Graphics Microsystems, Inc.
 13D5h  Media 100, Inc.
 13D6h  K.I. Technology Co., Inc.
 13D7h  Toshiba Engineering Corp.
 13D8h  Phobos Corp.
 13D9h  Apex PC Solutions, Inc.
 13DAh  Intresource Systems Pte., Ltd.
 13DBh  Janich & Klass Computertechnik GmbH
 13DCh  Netboost Corp.
 13DDh  Multimedia Bundle, Inc.
 13DEh  ABB Robotics Products AB
 13DFh  E-Tech, Inc.
 13E0h  GVC Corp.
 13E1h  Silicom Multimedia Systems, Inc.
 13E2h  Dynamics Research Corp.
 13E3h  Nest, Inc.
 13E4h  Calculex, Inc.
 13E5h  Telesoft Design, Ltd.
 13E6h  Argosy Research, Inc.
 13E7h  NAC, Inc.
 13E8h  Chip Express Corp.
 13E9h  Intraserver Technology, Inc.
 13EAh  Dallas Semiconductor
 13EBh  Hauppauge Computer Works, Inc.
 13ECh  Zydacron, Inc.
 13EDh  Raytheion E-Systems
 13EEh  Hayes Microcomputer Products, Inc.
 13F0h  Sundance Technology, Inc.
 13F1h  Oce' - Technologies B.V.
 13F2h  Ford Microelectronics, Inc.
 13F3h  McData Corp.
 13F4h  Troika Design, Inc.
 13F5h  Kansai Electric Co., Ltd.
 13F6h  C-Media Electronics, Inc.
 13F7h  Wildfire Communications
 13F8h  Ad Lib Multimedia, Inc.
 13F9h  NTT Advanced Technology Corp.
 13FAh  Pentland Systems, Ltd.
 13FBh  Aydin Corp.
 13FCh  Computer Peripherals International
 13FDh  Micro Science, Inc.
 13FEh  Advantech Co., Ltd.
 13FFh  Silicon Spice, Inc.
 1400h  ARTX, Inc.
 1401h  CR-Systems A/S
 1402h  Meilhaus Electronic GmbH
 1403h  Ascor, Inc.
 1404h  Fundamental Software, Inc.
 1405h  Excalibur Systems, Inc.
 1406h  Oce' Printing Systems GmbH
 1407h  Lava Computer Mfg., Inc.
 1408h  Aloka Co., Ltd.
 1409h  Timedia Technology Co., Ltd.
 140Ah  DSP Research, Inc.
 140Bh  Ramix, Inc.
 140Ch  Elmic Systems, Inc.
 140Dh  Matsushita Electrics Works, Ltd.
 140Eh  Goepel Electronic GmbH
 140Fh  Salient Systems Corp.
 1410h  Midas Lab, Inc.
 1411h  Ikos Systems, Inc.
 1412h  IC Ensemble, Inc.
 1413h  Addonics
 1414h  Microsoft
 1415h  Oxford Semiconductor, Ltd.
 1416h  Multiwave Innovation Pte, Ltd.
 1417h  Convergenet Technologies, Inc.
 1418h  Kyushu Electronics Systems, Inc.
 1419h  Excel Switching Corp.
 141Ah  Apache Micro Peripherals, Inc.
 141Bh  Zoom Telephonics, Inc.
 141Dh  Digitan Systems, Inc.
 141Eh  Fanuc, Ltd.
 141Fh  Visiontech, Ltd.
 1420h  Psion Dacom PLC
 1421h  ADS Technologies, Inc.
 1422h  Ygrec Systems Co., Ltd.
 1423h  Custom Technology Corp.
 1424h  Vidoeserver Connections
 1425h  ASIC Designers, Inc.
 1426h  Storage Technology Corp.
 1427h  Better On-line Solutions
 1428h  EDEC Co., Ltd.
 1429h  UNEX Technology Corp.
 142Ah  Kingmax Technology, Inc.
 142Bh  RadioLAN
 142Ch  Minton Optic Industry Co., Ltd.
 142Dh  Pix Stream, Inc.
 142Eh  Vitec Multimedia
 142Fh  Radicom Research, Inc.
 1430h  ITT Aerospace/Communications Division
 1431h  Gilat Satellite Networks
 1432h  Edimax Computer Co.
 1433h  Eltec Elektronik GmbH
 1435h  Real Time Devices US, Inc.
 1436h  CIS Technology, Inc.
 1437h  Nissin Co Inc
 1438h  Atmel-Dream
 1439h  Outsource Engineering & Mfg. Inc
 143Ah  Stargate Solutions Inc
 143Bh  Canon Research Center, America
 143Ch  Amlogic Inc
 143Dh  Tamarack Microelectronics Inc
 143Fh  Lightwell Co Ltd - Zax Division
 1440h  Algol Corp
 1441h  AGIE LTD
 1442h  Phoenix Contact Co GmbH
 1443h  Unibrain S.A.
 1444h  TRW
 1445h  Logical do Ltd
 1447h  AIM GmbH
 1448h  Alesis Studio
 1449h  TUT Systems Inc
 144Ah  Adlink Technology
 144Bh  Loronix Information Systems Inc
 144Ch  Catalina Research Inc
 144Eh  Olitec
 144Fh  Askey Computer Corp
 1450h  Nexus Systems Inc
 1451h  SP3D Chip Design GmbH
 1453h  Mycom Inc
 1454h  Altiga Networks
 1455h  Logic Plus Plus Inc
 1456h  Advanced Hardware
 1457h  Nuera Communications Inc
 1458h  Giga-Byte Technology
 1459h  Dooin Electronics
 145Ah  Escalate Networks Inc
 145Bh  Praim SRL
 145Ch  Cryptek
 145Dh  Gallant Computer Inc
 145Eh  Aashima Technology B.V.
 145Fh  Baldor Electric Company
 1460h  Dynarc Inc
 1461h  Avermedia Technologies Inc
 1462h  Micro-Star International Co Ltd
 1463h  Fast Corp
 1464h  Interactive Circuits & Systems Ltd
 1465h  GN Nettest Telecom Div.
 1466h  Designpro Inc
 1467h  Digicom SPA
 1468h  Ambit microsystem Corp
 1469h  Cleveland Motion Controls
 146Ah  IFR Ltd
 146Bh  Parascan Technologies Ltd
 146Ch  Ruby Tech Corp
 146Dh  Tachyon Inc
 146Eh  Williams Electronic Games Inc
 146Fh  Multi Dimensional Consulting Inc
 1470h  Bay Networks
 1471h  Integrated Telecom Express Inc
 1472h  Daikin Indistries Ltd
 1473h  Zapex Technologies Inc
 1474h  Doug Carson & Associates
 1475h  Picazo Communications
 1476h  Mortara Instrument Inc
 1477h  Net Insight
 1478h  Diatrend Corp
 1479h  Toray Industries Inc
 147Ah  Formosa Industrial Computing
 147Bh  Abit Computer Corp
 147Ch  Aware Inc
 147Dh  Interworks Computer Products
 147Eh  Matsushita Graphic Communication Systems Inc
 147Fh  Nihon Unisys Ltd
 1480h  SCII Telecom
 1481h  Biopac Systems Inc
 1482h  ISYTEC
 1483h  Labway Corp
 1668h  Action Tec Electronics, Inc.
 1A08h  Sierra Semiconductor
 1B13h  Jaton Corp.
 1C1Ch  Symphony (see #00864)
 1D44h  DPT
 1DE1h  TekRAM (see #00865)
 21C3h  21st Century Computer Corp.
 2348h  Racore 
 270Bh  Xantel Corp.
 270Fh  Chaintech Computer Co., Ltd.
 3000h  Hansol Electronics Inc.
 3142h  Post Impression Systems
 3388h  Hint Corp.
 3D3Dh  3DLabs (see #00866)
 4005h  Avance Logic, Inc. (see #00867)
 4444h  Internext Compression, Inc.
 4468h  BRIDGEPORT MACHINES
 4594h  Cogetec Informatique Inc.
 4680h  UMAX Computer Corp.
 4843h  Hercules Computer Technology, Inc.
 4942h  ???
 4943h  Growth Networks
 4978h  Axil Computer, Inc.
 4A14h  NetVin
 4B10h  Buslogic Inc. (see #00869)
 4C48h  Lung Hwa Electronics
 4D51h  Mediaq Inc
 4DDCh  ILC data Device Corp.
 5053h  Voyetra Technologies
 5143h  Qualcomm, Inc.
 5333h  S3 (see also #00870)
 5455h  Technische Universit„t Berlin
 5519h  Cnet Technologies, Inc.
 5555h  Genroco Inc
 5700h  Netpower
 6356h  UltraStor
 6374h  c't Magazin fuer Computertechnik (see #00871)
 6409h  Logitec Corp
 6666h  Decision Computer International Co.
 7604h  O.N. Electric Co Ltd
 8008h  Quancom Electronic GmbH (see #00872)
 8086h  Intel (see also #00873)
 8800h  Trigem Computer (see #00874)
 8866h  T-Square Design Inc
 8888h  Silicon Magic
 8E0Eh  Computone Corporation
 8E2Eh  KTI
 9004h  Adaptec (see #00875)
 9005h  Adaptec
 907Fh  Atronics (see #00876)
 9412h  Holtek
 A200h  NEC Corp. (see #00754)
 A259h  Hewlett Packard (see #00757)
 A25Bh  Hewlett Packard GmbH PL24-MKT (see #00757)
 A304h  Sony
 A727h  3com Corp. (see #00796)
 AA42h  Scitex Digital Video
 B1B3h  Shiva Europe, Ltd.
 C001h  TSI Telsys
 C0A9h  Micron/Crucial Technology
 C0DEh  Motorola (see #00768)
 C0FEh  Motion Engineering, Inc.
 CAFEh  Chrysalis-ITS
 D4D4h  DY4 Systems Inc.
 E159h  Tiger Jet Network Inc.
 E000h  Winbond
 E159h  Tiger Jet Network Inc.
 ECC0h  Echo Corp.
 EDD8h  Ark Logic Inc (see #00877)
 FEDAh  Epigram Inc
Note:   this list, as well as the following per-vendor tables, tends to be
          rather out-of-date.  The current version of the listing can be found
          in PCICFG.DAT, part of the PCICFG program distributed in RBPCIxxx.ZIP
          (available at http://www.pobox.com/~ralf/files.html).
SeeAlso: #00878

(Table 00733)
Values for Compaq PCI device code:
 0001h  EISA Bridge
 0002h  ISA Bridge
 1000h  Triflex/PCI CPU Bridge
 2000h  Triflex/PCI CPU Bridge
 3032h  QVision
 3033h  QVision 1280/p
 3034h  QVision 1280
 4000h  Triflex/PCI CPU Bridge
 AE32h  Netelligent 10/100 TX
 AE34h  Netelligent 10 T
 AE35h  Integrated NetFlex 3/P
 AE40h  Dual-port Netelligent 10/100 TX
 AE43h  ProLiant Integrated Netelligent 10/100
 B011h  Dual-port Netelligent 10/100 TX
 F130h  ThunderLAN
 F150h  NetFlex 3/P with BNC
SeeAlso: #00732

(Table 00734)
Values for Symbios Logic (formerly NCR) PCI device code:
 0001h  PCI revision ID:
        00-0Fh 53C810 (fast SCSI)
        10-1Fh 53C810A (fast SCSI)
        20-2Fh 53C810ALV (fast SCSI)
 0002h  53C820 (fast wide SCSI)
 0003h  PCI revision ID:
        00-0Fh 53C825 (fast wide SCSI)
        10-1Fh 53C825A (Ultra wide SCSI)
 0004h  53C815 (fast SCSI)
 0005h  53C810AP (fast SCSI)
 0006h  PCI revision ID:
        00-0Fh 53C860 (Ultra SCSI)
        10-1Fh 53C860LV (Ultra SCSI)
 000Fh  53C875 (Ultra wide SCSI)
 1000h  63c815 Fast-SCSI
SeeAlso: #00732

(Table 00735)
Values for ATI PCI device code:
 4158h  68800AX (Mach32)
 4354h  215CT222
 4358h  210888CX
 4758h  210888GX (Mach64)
 5654h  215VT222 Video Expression
SeeAlso: #00732

(Table 00736)
Values for ULSI Systems PCI device code:
 0201h   US201 Graphics Controller
SeeAlso: #00732

(Table 00737)
Values for VLSI Technologies PCI device code:
 0005h  82C592 CPU Bridge
 0006h  82C593 ISA Bridge
 0007h  82C594 Wildcat System Ctrlr
 0008h  VL82C597 Wildcat ISA Bridge
 0009h  82C597
 000Ch  82C541
 000Dh  82C543
 0101h  82C532
 0102h  82C534
 0104h  82C535
 0105h  82C147
 0200h  82C975 RISC GUI Accelerator
 0280h  82C925 RISC GUI Accelerator
SeeAlso: #00732

(Table 00738)
Values for Avance Logic, Inc. (Avance Logics) PCI device code:
 2301h  ALG2301 GUI accelerator
 2302h  ALG2302 GUI accelerator
SeeAlso: #00732,INT 10/AX=4F70h

(Table 00739)
Values for National Semiconductor PCI device code:
 0001h  DP83810 Ethernet
 0002h  PC87415 IDE DMA-Master Mode controller (see #00922)
 D001h  NS87410 EIDE controller (see #00921)
SeeAlso: #00732,#00773

(Table 00740)
Values for Tseng Labs PCI device code:
 3202h  ET4000/W32p-2
 3205h  ET4000/W32p-B
 3206h  ET4000/W32p-C
 3207h  ET4000/W32p-D
 3208h  ET6000
SeeAlso: #00732

(Table 00741)
Values for Weitek PCI device code:
 9000h  Power9000???
 9001h  Power9001
 9100h  Power9100
SeeAlso: #00732

(Table 00742)
Values for DEC PCI device code:
 0001h  DC21050 DEC BRD PCI-PCI bridge
 0002h  DC21040 Tulip
 0004h  DecChip 21030
 0009h  DC21140 Tulip Fast (see #00923)
 000Ah  21230   Video Codec
 000Fh  DEFPA   FDDI
 0014h  DC21041 Tulip Plus (see #00923)
 0016h  DGLPB   ATM
 0019h  DC21143 PCI/Cardbus Ethernet
 0021h  21052   PCI-PCI Bridge (see #00924)
 0022h  21150   PCI-PCI Bridge
 0024h  21152   PCI-PCI Bridge
 0025h  21153   PCI-PCI Bridge
 0026h  21154   PCI-PCI Bridge
 0045h  21553   PCI-PCI Bridge
 0046h  21554   PCI-PCI Bridge
 1050h??? 21340 Managed Port Switch
SeeAlso: #00732

(Table 00743)
Values for Cirrus Logic PCI device code:
 0038h  CL-GD7548 Video Controller
 004Ch  CL-GD7556 64-bit Video/Graphics LCD/CRT Ctrlr
 00A0h  Cirrus 5430
 00A4h  Cirrus 5434-4
 00A8h  Cirrus 5434-8
 00ACh  Cirrus 5436
 00B8h  Cirrus GD5446
 00BCh  CL-GD5480 64-bit SGRAM GUI accelerator
 1100h  Cirrus 6729 PCMCIA Controller
 1110h  Cirrus 6832 PCMCIA/CardBus Ctrlr
 1200h  Cirrus 7542
 1202h  Cirrus 7543
 1204h  Cirrus 7541
 6001h  CS4610/4611 CrystalClear SoundFusion Audio Accelerator
SeeAlso: #00732

(Table 00744)
Values for IBM PCI device code:
 0002h  MCA Bridge
 0005h  Alta Lite CPU Bridge
 0007h  Alta MP CPU Bridge
 000Ah  ISA Bridge
 0017h  CPU Bridge
 0018h  Auto LANStreamer
 001Bh  GXT-150P Graphics Adapter
 001Dh  82G2675
 0020h  MCA Bridge
 0022h  PCI-PCI Bridge
 002Eh  ??? RAID SCSI
 0036h  Miami/PCI  32-bit LocalBus Bridge
 0047h  ???
 0048h  ???
 004Ah  ???
 004Bh  ???
 004Ch  ???
 004Dh  ???
 004Eh  ???
 004Fh  ???
 0050h  ???
 0051h  ???
 0052h  ???
 0053h  ??? 25 MBit ATM controller
 0055h  ???
 0059h  ???
 005Ah  ???
 005Bh  ???
SeeAlso: #00732

(Table 00745)
Values for Western Digital PCI device code:
 0193h  WD33C193A 8-bit SCSI
 0196h  SCSI Bridge
 0197h  WD33C197A 16-bit SCSI
 0296h  WD33C296A 16-bit SCSI
 3193h  WD7193 Fast SCSI-II
 3197h  WD7197 Fast-Wide SCSI-II
 3296h  WD7197
 4296h  WD33C296 Wide Fast-20 Bridge
 C24Ah  90C?
SeeAlso: #00732

(Table 00746)
Values for AMI PCI device code:
 9010h  MegaRAID
 9030h  ??? IDE Controller
 9031h  ??? IDE Controller
 9032h  ??? IDE/SCSI Controller
 9033h  ??? SCSI Controller
 9040h  ??? Multimedia card
SeeAlso: #00732

(Table 00747)
Values for Advanced Micro Devices (AMD) PCI device code:
 2000h  Am79C970 (Lance)
        Am79C970A (PCnet-PCI II, PCI revision ID is 1xh)
        Am79C971 (PCnet-FAST, PCI revision ID is 2xh)
 2020h  Am53c974 SCSI (see #00925)
 2040h  Am79C974 Ethernet/SCSI
SeeAlso: #00732

(Table 00748)
Values for Trident PCI device code:
 9320h  ??? 32-bit GUI accelerator
 9350h  ??? 32-bit GUI accelerator
 9360h  ??? Flat-Panel controller
 9420h  Trident 9420
 9440h  Trident 9440
 9460h  Trident 9460
 9660h  Trident 9660
 9682h  ??? Multimedia accelerator
SeeAlso: #00732

(Table 00749)
Values for LSI Logic PCI device code:
 0000h  Hydra (Pentium chipset)
 0010h  Aspen (486 chipset)
SeeAlso: #00732

(Table 00750)
Values for Matrox PCI device code:
 0518h  MGA-II (Ultima)
 0519h  Millenium (2064W)
 0D10h  MGA-I (Impression)
SeeAlso: #00732

(Table 00751)
Values for Chips & Technologies PCI device code:
 00B8h  64310 GUI Accelerator
 00D0h  65545 Flat Panel/CRT VGA
 00D8h  F65545
 00DCh  F65548
 00E0h  65550 Flat Panel/CRT GUI Accelerator
 00E4h  65554 display
 00E5h  65555 HiQVPro LCD/CRT GUI Controller
 00F4h  68554 HiQVision LCD/CRT GUI Controller
SeeAlso: #00732

(Table 00752)
Values for Toshiba America PCI device code:
 0009h  r4x00 Bridge
SeeAlso: #00732

(Table 00753)
Values for Miro Computer Products AG PCI device code:
 5601h  36050
 5607h  video in/out w/ MPEG
SeeAlso: #00732

(Table 00754)
Values for NEC Corporation PCI device code:
 0001h  PCI-to-486 Bridge
 0002h  PCI-to-VL98 Bridge
 0003h  ATM LAN controller
 0004h  r4000PCI Bridge
 0005h  PCI-to-486 Bridge
 0006h  GUI Accelerator
 0007h  PCI-to-UXbus Bridge
 0008h  GUI Accelerator
 0009h  PC-98 Graphics Controller
SeeAlso: #00732

(Table 00755)
Values for Future Domain PCI device code:
 0000h  TMC-36C70 / TMC-18C30 (fast SCSI)
SeeAlso: #00732

(Table 00756)
Values for Silicon Integrated System (SIS) PCI device code:
 0001h  SiS6201
 0002h  SiS6202
 0006h  SI 85C501/2
 0008h  SI 85C503/5513
 0205h  SiS6205
 0406h  SiS501
 0496h  SiS496
 0596h  Pentium chipset
 0601h  SiS601
 3602h  IDE controller
 5401h  486 chipset
 5511h  SiS5511 Pentium chipset
 5513h  SiS5513 EIDE controller
 5581h  Pentium chipset
 5582h  ISA Bridge
 5596h  Pentium chipset
 6204h  video decoder/MPEG
 6205h  PCI VGA controller
SeeAlso: #00732

(Table 00757)
Values for Hewlett-Packard PCI device code:
 1030h  J2585A DeskDirect 10/100 PCI NIC
 1040h  J2973A DeskDirect 10BaseT PCI NIC
 1041h  J2585B DeskDirect 10/100 PCI NIC
 1042h  J2970A DeskDirect 10BaseT/2 PCI NIC
 2910h  E2910A PCI-bus exerciser
 2925h  E2925A PCI-bus exerciser
SeeAlso: #00732

(Table 00758)
Values for PC Technology PCI device code:
 1000h  RZ1000
 1001h  RZ1001
SeeAlso: #00732

(Table 00759)
Values for Distributed Processing Technology (DPT) PCI device code:
 A400h  2124A/9X EATA SmartCache/RAID SCSI
SeeAlso: #00732

(Table 00760)
Values for OPTi PCI device code:
 A0F8h  82C750 (Vendetta) USB controller
 C557h  82C557
 C558h  82C558
 C567h  82C750 (Vendetta, device 0)
 C568h  82C750 (Vendetta, device 1)
 C621h  82C621 IDE controller / 82C750 Vendetta IDE controller
 C822h  82C822
 C824h  82C824 FireFox PC-Card controller
 C825h  82C825 FireBridge II
 C861h  82C861/82C871 FireLink/FireBlast PCI-to-USB Bridge (see #00965)
 D568h  82C750 Vendetta IDE controller
 D768h  82C750 Vendetta IDE controller (ultra DMA)
SeeAlso: #00732

(Table 00761)
Values for SGS Thomson Microelectronics PCI device code:
 0008h  SGS 2000
 0009h  SGS 1764
SeeAlso: #00732

(Table 00762)
Values for BusLogic PCI device code:
 0140h  MultiMaster NC
 1040h  MultiMaster
 8130h  FlashPoint
SeeAlso: #00732

(Table 00763)
Values for Texas Instruments PCI device code:
 0500h  100 Mbit LAN controller
 0508h  tms380c2x
 1000h  TI PCI Eagle i/f
 3D04h  TVP4010  3D Graphics Processor   !!!ti\slas155.pdf p.26
 A001h  TDC1570  64-bit ATM sar
 A100h  TDC1561  32-bit ATM sar
 AC10h  PCI1050  PCCard controller
 AC11h  PCI1053  PCCard controller
 AC12h  PCI1130  PCCard controller
SeeAlso: #00732

(Table 00764)
Values for Oak Technology PCI device code:
 0107h  OTI-0107 (Spitfire)
SeeAlso: #00732

(Table 00765)
Values for Winbond PCI device code:
 0000h  ??? Ethernet controller
 0001h  83769
 0105h  82C105
SeeAlso: #00732

(Table 00766)
Values for Hitachi Ltd. PCI device code:
 0001h  PCI Bridge
 0002h  PCI-bus controller
SeeAlso: #00732

(Table 00767)
Values for EFAR Microsystems PCI device code:
 0810h  486 Bridge
 0922h  Pentium/P54C Bridge
 0926h  ISA Bridge
SeeAlso: #00732

(Table 00768)
Values for Motorola PCI device code:
 0001h  MPC105 PowerPC chipset
SeeAlso: #00732

(Table 00769)
Values for Promise Technology PCI device code:
 5300h  Promise 5300
SeeAlso: #00732

(Table 00770)
Values for Number 9 Computer Company PCI device code:
 2309h  Imagine 128
 2339h  Imagine 128-2
SeeAlso: #00732

(Table 00771)
Values for United Microelectronics (UMC) PCI device code:
 0001h  UM82C881 (486 chipset)
 0002h  UM82C776 (ISA Bridge)
 0101h  UM8673F
 0881h  UM8881 (486 chipset)
 0886h  UM8886F (ISA Bridge)
 0891h  UM8891A
 1001h  UM886A (dual IDE controller)
 673Ah  UM8886BF
 8710h  UM8710 VGA controller
 886Ah  UM8886A
 8881h  UM8881F
 8886h  UM8886F
 8891h  UM8891 (Pentium chipset)
 9017h  UM9017F
 E881h  UM8881 (486 chipset)
 E886h  UM8886N
 E891h  UM8891N
SeeAlso: #00732

(Table 00772)
Values for 8x8 (X Tech) PCI device code:
 0001h  AGX-016
 0002h  IIT3204/3501 MPEG decoder
SeeAlso: #00732

(Table 00773)
Values for PicoPower PCI device code:
 0000h  PT80C826 VL Bridge
 0001h  Vesuvius V1-LS System Controller (see PORT 0024h"V1-LS")
        Revision ID field: 03h = Rev. AA, 04h = Rev. BB, 05h = Rev. CC
 0002h  Vesuvius V3-LS ISA Bridge (see #00971,PORT 0024h"V3-LS")
 0005h  National Semiconductor PC87550 PCI System Controller
 8002h  Vesuvius V3-LS ISA Bridge (secondary; Rev. BB and higher only)
SeeAlso: #00732,#00739

(Table 00774)
Values for Mylex Corporation PCI device code:
 0001h  DAC960P Wide SCSI + RAID
SeeAlso: #00732

(Table 00775)
Values for Yamaha Corporation PCI device code:
 0001h  ?? 3D graphics controller
 0002h  YGV615  RPA3 3D graphics controller
SeeAlso: #00732

(Table 00776)
Values for NexGen Microsystems PCI device code:
 4E78h  NexGen 82C501
SeeAlso: #00732

(Table 00777)
Values for Q Logic PCI device code:
 1020h  ISP1020 Fast-Wide SCSI
 1022h  ISP1022 Fast-Wide SCSI
SeeAlso: #00732

(Table 00778)
Values for Leadtek Research PCI device code:
 0000h  LeadTek 805
SeeAlso: #00732

(Table 00779)
Values for Interphase PCI device code:
 0001h  ATM interface
 0002h  100 vg amylan controller
SeeAlso: #00732

(Table 00780)
Values for Data Technology Corporation (DTC) PCI device code:
 0802h  SL82C105  EIDE Controller
SeeAlso: #00732

(Table 00781)
Values for Contaq Microsystems PCI device code:
 0600h  Contaq 82C599
SeeAlso: #00732

(Table 00782)
Values for Forex Computer Corporation PCI device code:
 0001h  FR710  EIDE Controller
 0613h  ??? Host Bridge
SeeAlso: #00732

(Table 00783)
Values for Bit3 Computer PCI device code:
 0001h  Model 617  PCI-VME Bus Adapter
SeeAlso: #00732

(Table 00784)
Values for Olicom PCI device code:
 0001h  ??? Ethernet Controller
SeeAlso: #00732

(Table 00785)
Values for Intergraph Corporation PCI device code:
 0020h  3D graphics processor
 0021h  3D graphics processor w/texture
 0040h  3D graphics frame buffer
 0041h  3D graphics frame buffer
 0060h  proprietary bus bridge
 0720h  Motion JPEG codec
SeeAlso: #00732

(Table 00786)
Values for National Instruments PCI device code:
 C801h  PCI-GPIB
SeeAlso: #00732

(Table 00787)
Values for CMD Technology, Inc. PCI device code:
 0640h  CMD 640
 0642h  IDE controller with RAID-1
 0646h  CMD 646 EIDE
 0650h  PBC0650A Fast SCSI-II
SeeAlso: #00732

(Table 00788)
Values for Appian Technology:
 0038h  ??? EIDE Controller
SeeAlso: #00732

(Table 00789)
Values for Vision / Quantum Designs Ltd. PCI device code:
 0001h  QD8500
 0002h  QD8580
SeeAlso: #00732

(Table 00790)
Values for Brooktree Corporation PCI device code:
 0350h  BT848  TV/PCI with DMA Push
 2115h  BtV 2115 Mediastream Controller
 2125h  BtV 2125 Mediastream Controller
 8230h  Bt8230 ATM Segment/Reassembly Ctrlr (SRC) (see #00981)
SeeAlso: #00732

(Table 00791)
Values for Sierra Semiconductor PCI device code:
 0000h  STB 64-bit GUI accelerator
SeeAlso: #00732

(Table 00792)
Values for ACC Microelectronics PCI device code:
 0000h  ACC 2056
SeeAlso: #00732

(Table 00793)
Values for Symphony Labs PCI device code:
 0001h  83769
 0103h  sl82c103 PCI-IDE Controller
 0105h  82C105 bus-master PCI-IDE controller
SeeAlso: #00732

(Table 00794)
Values for PLX Technology PCI device code:
 9036h  PCI9036 interface chip
 9060h  PCI9060xx interface chip
SeeAlso: #00732

(Table 00795)
Values for Madge Networks PCI device code:
 0001h  Smart 16/4 Ringnode
 1000h  Collage 25 ATM adapter
 1001h  Collage 155 ATM adapter
SeeAlso: #00732

(Table 00796)
Values for 3com Corporation PCI device code:
 5900h  3C590
 5950h  3C595TX
 5951h  3C595T4
 5952h  3C595MII
 8811h  token ring
 9000h  3C900-TPO Fast Etherlink
 9001h  3C900-COMBO Fast Etherlink
 9050h  3C905-TX Fast Etherlink 10/100
SeeAlso: #00732

(Table 00797)
Values for Standard Microsystems Corporation (SMC) PCI device code:
 1000h  37C665 floppy disk controller
 1001h  37C922 floppy disk controller
SeeAlso: #00732

(Table 00798)
Values for Acer Labs Inc. PCI device code:
 1435h  M1435 VL Bridge
 1445h  ALI M1445 VL bridge + EIDE
 1449h  ALI M1449 ISA bridge
 1451h  ALI M1451 Pentium chipset
 1461h  ALI M1461 P54C chipset
 1489h  ALI M1489
 1511h  ALI M1511
 1513h  ALI M1513
 3141h  M3141 GUI accelerator VRAM
 3143h  M3143 GUI accelerator VRAM/DAC
 3145h  M3145 GUI accelerator VRAM
 3147h  M3147 GUI accelerator VRAM/DAC
 3149h  M3149 GUI accelerator VRAM
 3151h  M3151 GUI accelerator VRAM
 5212h  M4803
 5215h  ALI MS4803 EIDE controller
 5217h  m5217 I/O
 5219h  m5219 I/O
 5235h  m5225 I/O
SeeAlso: #00732

(Table 00799)
Values for Surecom Technology PCI device code:
 5240h  IDE Controller
 5241h  PCMCIA Bridge
 5242h  general-purpose controller
 5243h  Bus controller
 5244h  Floppy-disk controller
SeeAlso: #00732

(Table 00800)
Values for Neomagic Corporation:
 0000h  graphics controller
SeeAlso: #00732

(Table 00801)
Values for Advanced System Products PCI device code:
 1100h  ABP940 revision A??? SCSI
 1200h  ABP940 revision B??? Fast SCSI-2
 1300h  Fast-Wide SCSI controller
SeeAlso: #00732

(Table 00802)
Values for Citicorp TTI PCI device code:
 2001h  mb86605 Wide SCSI-2
SeeAlso: #00732

(Table 00803)
Values for CENR/ECP/EDU PCI device code:
 0001h  SPSB PMC
 0002h  SPSB PCI
 10DCh  ATT 2C15-3 FPGA
SeeAlso: #00732

(Table 00804)
Values for Evans & Sutherland PCI device code:
 0001h  3D graphics processor
SeeAlso: #00732

(Table 00805)
Values for Emulex Corporation PCI device code:
 1AE5h  Fibre Channel Host Adapter
SeeAlso: #00732

(Table 00806)
Values for Integrated Micro Solutions PCI device code:
 5026h  IMS5026/27/28 VL Bridge
 5028h  ISA Bridge
 8849h  IMS 8849
 8853h  ATM network card
 9128h  IMS9129 GUI accelerator
SeeAlso: #00732

(Table 00807)
Values for TekRAM Technology Corporation Ltd. PCI device code:
 690Ch  TekRAM 690c
SeeAlso: #00732

(Table 00808)
Values for Newbridge Microsystems PCI device code:
 0000h  CA91C042 VMEbus Bridge
SeeAlso: #00732

(Table 00809)
Values for Applied Micro Circuits Corp. PCI device code:
 4750h  S5933 PCI controller
 8043h  MyriNet
SeeAlso: #00732

(Table 00810)
Values for Integraphics Systems PCI device code:
 1680h  1680
SeeAlso: #00732

(Table 00811)
Values for Artist Graphics PCI device code:
 0101h  3GA 64-bit graphics processor
SeeAlso: #00732

(Table 00812)
Values for Realtek Semiconductor PCI device code:
 8029h  Realtek 8029
SeeAlso: #00732

(Table 00813)
Values for ASCII Corporation PCI device code:
 7310h  V7310 VGA Video Overlay
SeeAlso: #00732

(Table 00814)
Values for NKK Corporation PCI device code:
 A001h  NDR4000   NR4600 Bridge
SeeAlso: #00732

(Table 00815)
Values for Truevision PCI device code:
 0000h  ??? GUI Accelerator
 0001h  ??? GUI Accelerator
 0002h  ??? GUI Accelerator
 0003h  ??? GUI Accelerator
 0004h  ??? GUI Accelerator
 0005h  ??? GUI Accelerator
 0006h  ??? GUI Accelerator
 0007h  ??? GUI Accelerator
 0008h  ??? GUI Accelerator
 0009h  ??? GUI Accelerator
 0010h  ??? GUI Accelerator
 0011h  ??? GUI Accelerator
 0012h  ??? GUI Accelerator
 0013h  ??? GUI Accelerator
 0014h  ??? GUI Accelerator
 0015h  ??? GUI Accelerator
SeeAlso: #00732

(Table 00816)
Values for Initio Corporation PCI device code:
 9100h  320P
 9400h  Fast-Wide SCSI
 9700h  Fast-Wide SCSI
SeeAlso: #00732

(Table 00817)
Values for VIA Technologies PCI device code:
 0505h  VIA 82C505
 0561h  VIA 82C561
 0571h  AMD-645 Peripheral Bus Controller, function 1 (see #01034)
        VT82C586A/B PCI Integrated Peripheral Controller, function 1
 0576h  VIA 82C576
 0585h  VT82C585VPX Host Bus-PCI bridge (see #00982)
 0586h  AMD-645 Peripheral Bus Controller, function 0 (see #01011)
        VT82C586A/B PCI Integrated Peripheral Controller, function 0
 0595h  AMD-640 System Controller (see #00983)
        VT82C595
 0597h  VT82C597 / VT82C597AT
 1000h  82C570MV P54 Controller
 1106h  82C570MV ISA Bridge + IDE
 1571h  VIA 82C416
 3038h  AMD-645 Peripheral Bus Controller, function 2 (see #01046)
        VT82C586A/B PCI Integrated Peripheral Controller, function 2
 3040h  AMD-645 Peripheral Bus Controller, function 3 (see #01049)
        VT82C586B PCI Integrated Peripheral Controller, function 3
SeeAlso: #00732

(Table 00818)
Values for Proteon Inc. PCI device code:
 0100h  p1690plus-AA  Token Ring
 0101h  p1690plus-AB 2-port Token Ring
SeeAlso: #00732

(Table 00819)
Values for Cogent Data Technologies PCI device code:
 1400h  EM110TX PCI Fast Ethernet
SeeAlso: #00732

(Table 00820)
Values for Siemens Nixdorf PCI device code:
 6120h  SZB6120 Multimedia Adapter
SeeAlso: #00732

(Table 00821)
Values for Rockwell PCI device code:
 2200h  FDDI adapter
 2300h  Fast Ethernet adapter
 2340h  four-port Fast Ethernet
 2400h  ATM adapter
SeeAlso: #00732

(Table 00822)
Values for Datacube Inc. PCI device code:
 9500h  MAX-LC SuperVGA
 9501h  MAX-LC image processing
SeeAlso: #00732

(Table 00823)
Values for Vortex Computersysteme GmbH PCI device code:
 0000h  GDT60x0 SCSI RAID
 0001h  GDT6000B SCSI RAID
 0002h  GDT6x10 SCSI RAID
 0003h  GDT6x20 two-channel SCSI RAID
 0004h  GDT6530 three-channel SCSI RAID
 0005h  GDT6550 five-channel SCSI RAID
 0006h  GDT6x17
 0007h  GDT6x27
 0008h  GDT6537
 0009h  GDT6557
 000Ah  GDT6x15
 000Bh  GDT6x25
 000Ch  GDT6535
 000Dh  GDT6555
SeeAlso: #00732

(Table 00824)
Values for Efficient Networks, Inc. PCI device code:
 0000h  155P-MF1 ATM FPGA
 0002h  ATM ASIC
SeeAlso: #00732

(Table 00825)
Values for FORE Systems PCI device code:
 0210h  PCA200PC
 0300h  PCA200E
SeeAlso: #00732

(Table 00826)
Values for Infomedia MicroElectronics PCI device code:
 0000h  EIDE/HD and IDE/CD-ROM controller
 000Bh  EIDE/HD and IDE/CD-ROM controller
SeeAlso: #00732

(Table 00827)
Values for Imaging Technology PCI device code:
 0000h  ICPCI
 0001h  video frame grabber/processor
SeeAlso: #00732

(Table 00828)
Values for Mercury Computer Systems PCI device code:
 0001h  Raceway Bridge
SeeAlso: #00732

(Table 00829)
Values for Fuji Xerox Co Ltd. PCI device code:
 0001h  Printer Controller
SeeAlso: #00732

(Table 00830)
Values for Ziatech Corporation PCI device code:
 8905h  8905 STD-32 Bridge
SeeAlso: #00732

(Table 00831)
Values for Dynamic Pictures Inc. PCI device code:
 0001h  VGA-compatible 3D graphics
SeeAlso: #00732

(Table 00832)
Values for Cyclone Microsystems (PLX Technology???) PCI device code:
 0001h  PLX 9060
 0911h  PCI 911  i960Jx Intelligent I/O
 0912h  PCI 912  i960Cx Intelligent I/O
 0913h  PCI 913  i960Hx Intelligent I/O
SeeAlso: #00732

(Table 00833)
Values for Crest Microsystem PCI device code:
 0001h  EIDE/ATAPI super adapter
SeeAlso: #00732

(Table 00834)
Values for Alliance Semiconductor Corp. PCI device code:
 3210h  Pro Motion 3210
 6410h  GUI Accelerator
 6412h  GUI Accelerator
 6420h  GUI Accelerator
 6422h  Pro Video
 6424h  GUI Accelerator
 6426h  GUI Accelerator
SeeAlso: #00732

(Table 00835)
Values for Cincinnati Milacron PCI device code:
 0001h  Noservo Controller
SeeAlso: #00732

(Table 00836)
Values for Schneider & Koch Co. PCI device code:
 4000h  FDDI adapter
SeeAlso: #00732

(Table 00837)
Values for VMIC PCI device code:
 7587h  VME
SeeAlso: #00732

(Table 00838)
Values for Digi International / Stargate PCI device code:
 0003h  RightSwitch
SeeAlso: #00732

(Table 00839)
Values for Voarx R&D Inc. PCI device code:
 3011h  Tokenet/vg 1001/10m anylan
 9050h  Lanfleet/Truevalue
SeeAlso: #00732

(Table 00840)
Values for MuTech PCI device code:
 0001h  MV1000
SeeAlso: #00732

(Table 00841)
Values for PFU Ltd. PCI device code:
 0001h  Host Bridge
SeeAlso: #00732

(Table 00842)
Values for Creative Labs (vendor ID 1163h) PCI device code:
 0001h  3D Blaster
SeeAlso: #00732

(Table 00843)
Values for Imagraph Corporation PCI device code:
 0001h  Motion JPEG record/play w/ audio
SeeAlso: #00732

(Table 00844)
Values for Alfa Inc. PCI device code:
 AFA1h  Fast Ethernet
SeeAlso: #00732

(Table 00845)
Values for Matsushita Electronics PCI device code:
 1592h  ???
SeeAlso: #00732

(Table 00846)
Values for Corollary Inc. PCI device code:
 0014h  PCIB  C-bus II to PCI bridge chip
SeeAlso: #00732

(Table 00847)
Values for BitFlow Inc. PCI device code:
 0001h  Raptor-PCI frame grabber
SeeAlso: #00732

(Table 00848)
Values for Artop Electric PCI device code:
 0001h  IDE controller
 0002h  IDE controller
 0003h  SCSI-2 cache controller
 0004h  ATP8400 ASIC cache accelerator
 8001h  SCSI-2 cache controller
 8002h  SCSI-2 controller
SeeAlso: #00732

(Table 00849)
Values for Zeitnet Inc. PCI device code:
 0001h  Zeitnet 1221
 0002h  Zeitnet 1225
SeeAlso: #00732

(Table 00850)
Values for InnoSys Inc. PCI device code:
 4240h  AMCC S5933Q Intelligent Serial Card
SeeAlso: #00732

(Table 00851)
Values for Galileo Technology PCI device code:
 0146h  GT-64010 System Controller for R46xx CPU
 4801h  GT-48001 8-port switched Ethernet ctrlr
SeeAlso: #00732

(Table 00852)
Values for V3 Semiconductor Inc. PCI device code:
 0292h  V292PBC  Am29030/40 Bridge
 0960h  V96xPBC  i960 Bridge
 C960h  V96DPC   i960 dual PCI Bridge
SeeAlso: #00732

(Table 00853)
Values for Pathlight Technology PCI device code:
 C0EDh  SSA Controller
SeeAlso: #00732

(Table 00854)
Values for Dolphin Interconnect Solutions PCI device code:
 0658h  PSB  PCI-SCI Bridge
SeeAlso: #00732

(Table 00855)
Values for Specialix Research Ltd. PCI device code:
 2000h  PCI-9050 Target Interface
 4000h  Specialix XIO (SUPI-1 Target Interface)
 8000h  Specialix RIO (T255 Bridge)
SeeAlso: #00732

(Table 00856)
Values for Compex USA, Inc. PCI device code:
 1401h  ReadyLINK RL2000 10MBit NIC
SeeAlso: #00732

(Table 00857)
Values for PMC-Sierra Inc. PCI device code:
 7375h  PM7375 LASAR-155 ATM SAR
SeeAlso: #00732

(Table 00858)
Values for RP PCI device code:
 0001h  RP8OCTA
 0002h  RP8INTF
 0003h  RP16INTF
 0004h  RP32INTF
SeeAlso: #00732

(Table 00859)
Values for Cyclades PCI device code:
 0100h  Cyclom Y Lo multiport serial card
 0101h  Cyclom Y Hi
 0200h  Cyclom Z Lo multiport serial card
 0201h  Cyclom Z Hi
SeeAlso: #00732

(Table 00860)
Values for Ariel Corporation PCI device code:
 1220h  AMCC 5933  TMS320C80 DSP/Imaging Board
SeeAlso: #00732

(Table 00861)
Values for Harris Semiconductor PCI device code:
 8130h  HMP8130 NTSC/PAL Video Decoder
 8131h  HMP8131 NTSC/PAL Video Decoder
SeeAlso: #00732

(Table 00862)
Values for Ensoniq PCI device code:
 1371h  AudioPCI-97 ES1371
 5000h  AudioPCI ES1370
SeeAlso: #00732

(Table 00863)
Values for Picture Elements PCI device code:
 0081h  PCIVST  PCI Thresholding Engine
SeeAlso: #00732

(Table 00864)
Values for Symphony PCI device code:
 0001h  Symphony 82C101 IDE controller
SeeAlso: #00732

(Table 00865)
Values for TekRAM PCI device code:
 DC29h  DC290 / DC290M EIDE controller
SeeAlso: #00732

(Table 00866)
Values for 3DLabs PCI device code:
 0004h  3C0SX GUI Accelerator
SeeAlso: #00732

(Table 00867)
Values for Avance Logic, Inc. PCI device code:
 2301h  AVL2301 GUI Accelerator
 2303h  AVG2302 GUI Accelerator
SeeAlso: #00732

(Table 00868)
Values for 4942h PCI device code:
 4C4Ch  ??? (Ensoniq AudioPCI ES1370 subsystem)
SeeAlso: #00732

(Table 00869)
Values for BusLogic Inc. PCI device code:
 3080h  ??? SCSI-ti
 4010h  ??? Fast-Wide SCSI-2
SeeAlso: #00732

(Table 00870)
Values for S3 PCI device code:
 5631h  86C325 ViRGE 3D GUI Accelerator
 8800h  Vision 866
 8801h  Vision 964
 8810h  S3 Trio32
 8811h  S3 Trio64, or Trio64V+
 8812h  S3 Trio64UV+
 8813h  S3 Trio64? v3
 883Dh  S3 ViRGE/VX
 888xh  S3 868
 88Bxh  S3 928
 88C0h  S3 864-1
 88C1h  S3 864-2
 88C2h  S3 864-3
 88C3h  S3 864-4
 88D0h  S3 964-1
 88D1h  S3 964-2
 88D2h  S3 964-3
 88D3h  S3 964-4
 88F0h  S3 968
 88F1h  S3 968-2
 88F2h  S3 968-3
 88F3h  S3 968-3
 8900h  S3 Trio64 V2/DX GUI Accelerator
 8901h  S3 775 Trio64V2
 8902h  S3 PLATO/PX
 8A01h  S3 ViRGE/DX or ViRGE/GX
 8A10h  ???
 8C00h  ???
 8C01h  ???
SeeAlso: #00732,#00873

(Table 00871)
Values for c't Magazin f�r Computer PCI device code:
 6773h  GPPCI  PCI interface
SeeAlso: #00732

(Table 00872)
Values for Quancom Electronic PCI device code:
 0010h  PCI-WDOG1 Watchdog
 0011h  PWDOG2 Watchdog2/PCI
SeeAlso: #00732

(Table 00873)
Values for Intel PCI device code:
 0482h  82375EB/SB PCI-EISA Bridge (see #01054)
 0483h  82424 Cache Controller (see #01063)
 0484h  82378/82379 Bus Interface (Mercury/Saturn/Neptune chipsets) (see #01064)
 0486h  82425EX/82430
 04A3h  82434 LX (Mercury) / NX (Neptune) (see #01055)
 0960h  i960 RP Microprocessor/Bridge
 1221h  82092AA PCMCIA Bridge
 1222h  82092AA IDE Controller
 1223h  Intel SAA7116
 1226h  82596
 1227h  82865
 1228h  EtherExpress Pro/100 Smart
 1229h  82557 Fast Ethernet (see #01227)
 122Dh  82437FX (Triton)
 122Eh  82371FB ISA Bridge (Triton)
 1230h  82338 IDE controller / 82371FB IDE function (Triton)
 1234h  82371MX (see #01168)
 1235h  82437MX
 1237h  82441FX (see #01229)
 1239h  82371FB IDE Interface (Triton)
 123Ch  82380AB Mobile PCI-to-ISA Bridge (see #01090)
 124Bh  82380FB Mobile PCI-to-PCI Bridge (see #04069)
 1250h  82439HX (430HX chipset) (see #01098)
 1960h  80960RP i960RP Microprocessor
 7000h  82371SB ISA Bridge (see #01167)
 7010h  82371SB IDE controller (see #01214)
 7020h  82371SB (see #01215)
 7030h  82437VX (430VX chipset) (see #01108)
 7100h  82439TX (430TX chipset) (see #01099)
 7110h  82371AB PIIX4 ISA Bridge (see #01100)
 7111h  82371AB PIIX4 Ultra DMA IDE Controller (see #01103)
 7112h  82371AB PIIX4 USB Controller (see #01104)
 7113h  82371AB PIIX4 Power Management Controller (see #01105)
 7180h  82443LX/EX 440LX/EX Host-PCI Bridge (see #01129)
 7181h  82443LX/EX 440LX/EX AGP device (see #01130)
 7190h  82443BX 440BX PCI-Host Bridge (AGP Enabled) (see #01142)
 7191h  82443BX 440BX PCI-PCI Bridge (see #01143)
 7192h  82443BX 440BX PCI-Host Bridge (AGP Disabled) (see #01142)
 71A0h  82443GX Host Bridge/Controller (AGP enabled)
 71A1h  82443GX AGP Controller
 71A2h  82443GX Host Bridge/Controller (AGP disabled)
 84C4h  82450KX/GX PCI Bridge (Orion) (see #01240)
 84C5h  82450KX/GX Memory Ctrlr (Orion)
 84CAh  82451NX (450NX) Memory & I/O Controller (MIOC)
 84CBh  82454NX (450NX) PCI Expansion Bridge (PXB)
SeeAlso: #00732,#00870

(Table 00874)
Values for Trigem Computer PCI device code:
 2008h  video assistant
SeeAlso: #00732

(Table 00875)
Values for Adaptec PCI device code:
 1078h  AIC-7810C RAID Coprocessor
 5078h  x940 Fast-Wide SCSI-II Ctrlr
 5578h  AHA-2830P SCSI Controller
 7078h  AHA-294x/AIC-7870P Fast-Wide SCSI-II
 7178h  AHA-2940 Fast-Wide SCSI-II
 7278h  x940 two-channel Fast-Wide SCSI
 7378h  AHA-3985 4-channel RAID SCSI
 7478h  AHA-2944 SCSI
 7810h  AIC-7810 memory control IC
 7850h  AIC-7850 SCSI IC (see #01241)
 7855h  AHA-2930 SCSI
 7870h  AIC-7870 SCSI IC
 7871h  AHA-2940
 7872h  AHA-3940
 7873h  AHA-3980
 7874h  AHA-2944 Differential SCSI
 7880h  AIC-7880 Fast-20 SCSI
 8078h  Adaptec 7880
 8178h  Adaptec 2940UW
 8278h  AHA-3940U/UW
 8378h  Adaptec 7883
 8478h  Adaptec 7884
SeeAlso: #00732

(Table 00876)
Values for Atronics PCI device code:
 2015h  Atronics 2015
SeeAlso: #00732

(Table 00877)
Values for Ark Logic Inc. PCI device code:
 A091h  ARK 1000PV ??? Stingray
 A099h  ARK 2000PV ??? Stingray
 A0A1h  ark2000mt 64-bit GUI Accel w/DCI
SeeAlso: #00732
--------X-1AB103-----------------------------
INT 1A - PCI BIOS v2.0c+ - FIND PCI CLASS CODE
        AX = B103h
        ECX = class code (see also #F0085,#00878)
            bits 31-24 unused
            bits 23-16 class
            bits 15-8  subclass
            bits 7-0   programming interface
        SI = device index (0-n)
Return: CF clear if successful
        CF set on error
        AH = status (00h,86h) (see #00729)
            00h successful
                BH = bus number
                BL = device/function number (bits 7-3 device, bits 2-0 func)
            86h device not found
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on return were exchanged between the initial
          drafts of the specification and final implementation
        all devices sharing the same Class Code may be enumerated by
          incrementing SI from 0 until error 86h is returned
SeeAlso: AX=B183h
--------X-1AB106-----------------------------
INT 1A - PCI BIOS v2.0c+ - PCI BUS-SPECIFIC OPERATIONS
        AX = B106h
        BL = bus number
        EDX = Special Cycle data
Return: CF clear if successful
        CF set on error
        AH = status (00h,81h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Note:   this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
SeeAlso: AX=B186h,INT 2F/AX=1684h/BX=304Ch
--------X-1AB108-----------------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION BYTE
        AX = B108h
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh) (see #00878)
Return: CF clear if successful
            CL = byte read
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
BUG:    the Award BIOS 4.51PG (dated 05/24/96) incorrectly returns FFh for
          register 00h if the PCI function number is nonzero
SeeAlso: AX=B109h,AX=B10Ah,AX=B188h,INT 2F/AX=1684h/BX=304Ch
--------X-1AB109-----------------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION WORD
        AX = B109h
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh, must be multiple of 2) (see #00878)
Return: CF clear if successful
            CX = word read
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
BUG:    the Award BIOS 4.51PG (dated 05/24/96) incorrectly returns FFFFh for
          register 00h if the PCI function number is nonzero
SeeAlso: AX=B108h,AX=B10Ah,AX=B189h,INT 2F/AX=1684h/BX=304Ch
--------X-1AB10A-----------------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION DWORD
        AX = B10Ah
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh, must be multiple of 4) (see #00878)
Return: CF clear if successful
            ECX = dword read
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
BUG:    the Award BIOS 4.51PG (dated 05/24/96) incorrectly returns FFFFFFFFh
          for register 00h if the PCI function number is nonzero
SeeAlso: AX=B108h,AX=B109h,AX=B10Ah/SF=8086h,AX=B18Ah,INT 2F/AX=1684h/BX=304Ch

Format of PCI Configuration Data:
Offset  Size    Description     (Table 00878)
 00h    WORD    vendor ID (read-only) (see #00732 at AX=B102h)
                FFFFh returned if requested device non-existent
 02h    WORD    device ID (read-only)
 04h    WORD    command register (see #00879)
 06h    WORD    status register (see #00880)
 08h    BYTE    revision ID
 09h  3 BYTEs   class code
                bits 7-0: programming interface
                bits 15-8: sub-class
                bits 23-16: class code (see also #F0085)
 0Ch    BYTE    cache line size
 0Dh    BYTE    latency timer
 0Eh    BYTE    header type
                bits 6-0: header format
                        00h other
                        01h PCI-to-PCI bridge
                        02h PCI-to-CardBus bridge
                bit 7: multi-function device
 0Fh    BYTE    Built-In Self-Test result (see #00881)
---header type 00h---
 10h    DWORD   base address 0 (see #00882)
                (OpenHCI) base address of host controller registers (see #00902)
 14h    DWORD   base address 1
 18h    DWORD   base address 2
 1Ch    DWORD   base address 3
 20h    DWORD   base address 4
 24h    DWORD   base address 5
 28h    DWORD   CardBus CIS pointer (read-only) (see #00889)
 2Ch    WORD    subsystem vendor ID or 0000h
 2Eh    WORD    subsystem ID or 0000h
 30h    DWORD   expansion ROM base address (see #00883)
 34h    BYTE    offset of capabilities list within configuration space (R/O)
                (only valid if status register bit 4 set) (see #00884)
 35h  3 BYTEs   reserved
 38h    DWORD   reserved
 3Ch    BYTE    interrupt line
                00h = none, 01h = IRQ1 to 0Fh = IRQ15
 3Dh    BYTE    interrupt pin (read-only)
                (00h = none, else indicates INTA# to INTD#)
 3Eh    BYTE    minimum time bus master needs PCI bus ownership, in 250ns units
                (read-only)
 3Fh    BYTE    maximum latency, in 250ns units (bus masters only) (read-only)
 40h 48 DWORDs  varies by device (see #00919,#00920,#01055,#01083)
---header type 01h---
 10h    DWORD   base address 0 (see #00882)
 14h    DWORD   base address 1
 18h    BYTE    primary bus number (for bus closer to host processor)
 19h    BYTE    secondary bus number (for bus further from host processor)
 1Ah    BYTE    subordinate bus number
 1Bh    BYTE    secondary latency timer
 1Ch    BYTE    I/O base (see #00899)
 1Dh    BYTE    I/O limit (see #00899)
 1Eh    WORD    secondary status
 20h    WORD    memory base (see #00900)
 22h    WORD    memory limit
 24h    WORD    prefetchable memory base
 26h    WORD    prefetchable memory limit
 28h    DWORD   prefetchable base, upper 32 bits
 2Ch    DWORD   prefetchable limit, upper 32 bits
 30h    WORD    I/O base, upper 16 bits
 32h    WORD    I/O limit, upper 16 bits
 34h    DWORD   reserved
 38h    DWORD   expansion ROM base address
 3Ch    BYTE    interrupt line
 3Dh    BYTE    interrupt pin (read-only)
 3Eh    WORD    bridge control (see #00901)
 40h 48 DWORDs  varies by device (see #00919,#00920,#01055,#01083)
---header type 02h---
 10h    DWORD   CardBus Socket/ExCa base address (see #00890)
                bits 31-12: start address of socket interface register block
                          in 4K blocks
                bits 11-0: reserved (0)
 14h    BYTE    offset of capabilities list within configuration space (R/O)
                (only valid if status register bit 4 set) (see #00884)
 15h    BYTE    reserved
 16h    WORD    secondary status
 18h    BYTE    PCI bus number
 19h    BYTE    CardBus bus number
 1Ah    BYTE    subordinate bus number
 1Bh    BYTE    CardBus latency timer
 1Ch    DWORD   memory base address 0
 20h    DWORD   memory limit 0
 24h    DWORD   memory base address 1
 28h    DWORD   memory limit 1
 2Ch    WORD    I/O base address 0
 2Eh    WORD    I/O base address 0 high word (optional)
 30h    WORD    I/O limit 0
 32h    WORD    I/O limit 0 high word (optional)
 34h    WORD    I/O base address 1
 36h    WORD    I/O base address 1 high word (optional)
 38h    WORD    I/O limit 1
 3Ah    WORD    I/O limit 1 high word (optional)
 3Ch    BYTE    interrupt line
 3Dh    BYTE    interrupt pin (read-only) (no interrupt used if 00h)
 3Eh    WORD    bridge control
 40h    WORD    subsystem vendor ID
 42h    WORD    subsystem device ID
 44h    DWORD   16-bit PC Card legacy mode base address (for accessing ExCa
                  registers)
 48h 14 DWORDs  reserved
 80h 32 DWORDs  varies by device (see #00919,#00920,#01055,#01083)

Bitfields for PCI Configuration Command Register:
Bit(s)  Description     (Table 00879)
 0      I/O access enabled
 1      memory access enabled
 2      bus master enable
 3      special cycle recognition enabled
 4      memory write and invalidate enabled
 5      VGA palette snoop enabled
 6      parity error response enabled
 7      wait cycles enabled
 8      system error (SERR# line) enabled
 9      fast back-to-back transactions enabled
 15-10  reserved
SeeAlso: #00878,#00880

Format of PCI Configuration Status Register:
Bit(s)  Description     (Table 00880)
 3-0    reserved (0)
 4      new capabilities list is present (first entry pointed at by byte at
          34h or 14h)
 5      capable of running at 66 MHz
 6      UDF supported
 7      capable of fast back-to-back transactions
 8      data parity error reported
 10-9   device select timing
        00 fast
        01 medium
        10 slow
        11 reserved
 11     signaled target abort
 12     received target abort
 13     received master abort
 14     signaled system error (device is asserting SERR# line)
 15     detected parity error (set even if parity error reporting is disabled)
Note:   bits 12, 13 and 15 are cleared by writing a 1 into the corresponding
          bit
SeeAlso: #00878,#00879

Bitfields for PCI Configuration Built-In Self-Test register:
Bit(s)  Description     (Table 00881)
 3-0    completion code (0000 = successful)
 5-4    reserved
 6      start BIST (set to one to start, cleared automatically on completion)
 7      BIST-capable
Notes:  this register is hardwired to 00h if no BIST capability
        software should timeout the BIST after two seconds
SeeAlso: #00878

Bitfields for PCI Configuration Base Address:
Bit(s)  Description     (Table 00882)
 0      address type (0 = memory space, 1 = I/O space)
---memory address---
 2-1    address type
        00 anywhere in first 4GB
        01 below 1MB
        10 anywhere in 64-bit address space
        11 reserved
 3      prefetchable
 31-4   bits 31-4 of base memory address if addressable in first 1MB or 4GB
 63-4   bits 63-4 of base memory address if addressable in 64-bit memory
        (bits 63-32 are stored in the following base address DWORD)
---I/O address---
 1      reserved
 31-2   bits 31-2 of base I/O port
SeeAlso: #00878,#00902

Bitfields for PCI Configuration Expansion ROM Address:
Bit(s)  Description     (Table 00883)
 0      address decode enable (ROM address is valid)
 10-1   reserved
 31-11  bits 31-11 of ROM's starting physical address
SeeAlso: #00878

Format of PCI Capabilities List:
Offset  Size    Description     (Table 00884)
 00h    BYTE    capability identifier
                01h PCI Power Managment
 01h    BYTE    offset of next item (within configuration space) or 00h
      N BYTEs   varies by capability type
---PCI Power Management---
 02h    WORD    power managment capabilities (see #00885) (read-only)
 04h    WORD    power managment capabilities status register (see #00886)
 06h    BYTE    PMCSR bridge support extensions (see #00887)
 07h    BYTE    (optional) read-only data register (see #00888)
Note:   this information is from the v0.93 draft of the specification and is
          subject to change
SeeAlso: #00878,#00880

Bitfields for PCI Power Management Capabilities:
Bit(s)  Description     (Table 00885)
 15     reserved (0)
 14-12  PME# support
        bit 12: PME# can be asserted from power state D0
        bit 13: PME# can be asserted from power state D1
        bit 14: PME# can be asserted from power state D2
 11     reserved (0)
 10     D2 power state supported
 9      D1 power state supported
 8      full-speed clock is required in state D0 for proper operation
        (if clear, device may be run at reduced clock except when actually
          being accessed)
 7-6    dynamic clock control support
        00 not bridge, no dynamic clock control, or secondary bus' clock is
              is tied to primary bus' clock
        01 bridge is capable of dynamic clock control
        10 reserved
        11 secondary bus has independent clock, but dynamic clock not supported
 5      device-specific initialization is required
 4      auxiliary power required for PME# generation
 3      PCI clock required for PME# generation
 2-0    specification version
        001 = v1.0; four bytes of power management registers
Note:   this information is from the v0.93 draft of the specification and is
          subject to change
SeeAlso: #00884,#00886,#00887

Bitfields for PCI Power Management Capabilities Status Register:
Bit(s)  Description     (Table 00886)
 15     PME status: if set, PME# is (or would be) asserted
        writing a 1 to this bit clears it
 14-13  (read-only) scale factor to apply to contents of Data register
        00 unknown (or unimplemented data)
        01 x0.1
        10 x0.01
        11 x0.001
 12-9   (read-write) data select (see #00888)
 8      (read-write) enable PME# assertion
 7-5    reserved (0)
 4      (read-write) enable dynamic data reporting
        when set, PME# is asserted whenever the value in the Data register
          changes significantly
 3-2    reserved (0)
 1-0    (read-write) current power state
        00 = D0
        ...
        11 = D3
Note:   this information is from the v0.93 draft of the specification and is
          subject to change
SeeAlso: #00884,#00885,#00887

Bitfields for PCI Power Management PMCSR bridge support extension:
Bit(s)  Description     (Table 00887)
 7      (read-only) Bus Power Control Enable
 6      (read-only) Bus Power State B3 supported
 5      (read-only) Bus Power State B2 supported
 4      dynamic clock control enable
 3-0    reserved (0)
Note:   this information is from the v0.93 draft of the specification and is
          subject to change
SeeAlso: #00884,#00885,#00886

(Table 00888)
Values for PCI Power Management Data Select:
 00h    D0-state power consumed in watts (+20%/-10%)
 01h    D1-state power consumed in watts (+20%/-10%)
 02h    D2-state power consumed in watts (+20%/-10%)
 03h    D3-state power consumed in watts (+20%/-10%)
 04h    D0-state power dissipated into chassis in watts
 05h    D1-state power dissipated into chassis in watts
 06h    D2-state power dissipated into chassis in watts
 07h    D3-state power dissipated into chassis in watts
 08h-0Fh reserved
SeeAlso: #00886

Bitfields for PCI Configuration CardBus CIS Pointer:
Bit(s)  Description     (Table 00889)
 2-0    address space
        000 in device's device-specific configuration space
        001 in memory pointed to by base address register 0
        ...
        110 in memory pointed to by base address register 5
        111 in device's expansion ROM
 27-3   offset within address space defined by bits 2-0
 31-28  ROM image number (when address space is expansion ROM)
SeeAlso: #00878

Format of CardBus Socket/ExCA socket interface register space:
Offset  Size    Description     (Table 00890)
 00h    DWORD   Socket Event Register (see #00892)
 04h    DWORD   Socket Mask Register (see #00893)
 08h    DWORD   Socket Present State Register (see #00894)
 0Ch    DWORD   Socket Force Event Register (see #00895)
 10h    DWORD   Socket Control Register (see #00896)
 14h  3 DWORDs  reserved
 20h    DWORD   Socket Power Management Register
 90h    BYTE    (TI PCI1130) Retry Status Register
 91h    BYTE    (TI PCI1130) Card Control Register (see #00897)
 92h    BYTE    (TI PCI1130) Device Control Register (see #00898)
 93h    BYTE    (TI PCI1130) Buffer Control Register
800h 64+ BYTEs  ExCa Socket Interface Registers (see #00891)

Format of ExCa memory-mapped registers:
Offset  Size    Description     (Table 00891)
 00h    BYTE    identification and revision register
 01h    BYTE    interface status register
 02h    BYTE    power control register
 03h    BYTE    interrupt and general control
 04h    BYTE    card status change
 05h    BYTE    card status change interrupt configuration
 06h    BYTE    address window enable
 07h    BYTE    I/O window control register
 08h    WORD    I/O window 0 start address
 0Ah    WORD    I/O window 0 end address
 0Ch    WORD    I/O window 1 start address
 0Eh    WORD    I/O window 1 end address
 10h    WORD    memory window 0 start address
 12h    WORD    memory window 0 end address
 14h    WORD    memory window 0 offset address
 16h  2 BYTEs   user-defined
 18h    WORD    memory window 1 start address
 1Ah    WORD    memory window 1 end address
 1Ch    WORD    memory window 1 offset address
 1Eh    BYTE    user-defined
 1Fh    BYTE    reserved
 20h    WORD    memory window 2 start address
 22h    WORD    memory window 2 end address
 24h    WORD    memory window 2 offset address
 26h  2 BYTEs   user-defined
 28h    WORD    memory window 3 start address
 2Ah    WORD    memory window 3 end address
 2Ch    WORD    memory window 3 offset address
 2Eh  2 BYTEs   user-defined
 30h    WORD    memory window 4 start address
 32h    WORD    memory window 4 end address
 34h    WORD    memory window 4 offset address
 36h 10 BYTEs   user-defined
---optional---
 40h    BYTE    memory window 0 start address high byte
 41h    BYTE    memory window 1 start address high byte
 42h    BYTE    memory window 2 start address high byte
 43h    BYTE    memory window 3 start address high byte
 44h    BYTE    memory window 4 start address high byte
 45h-7FFh       user-defined
SeeAlso: #00890

Bitfields for CardBus Socket Event Register:
Bit(s)  Description     (Table 00892)
 0      CSTSCHG pin asserted (status change)
 1      CCD1# (card detect 1) changed state
 2      CCD2# (card detect 2) changed state
 3      interface power cycle completed
31-4    reserved (0)
Note:   the bits in this register are set by the bridge, and cleared by writing
          a one into the bits one wishes to clear
SeeAlso: #00890,#00893,#00895

Bitfields for CardBus Socket Event Mask Register:
Bit(s)  Description     (Table 00893)
 0      write-protect (enable status-change interrupt on WriteProtect switch)
 1      ready mask (allow status-change interrupt on Ready line change)
 3-2    battery condition (allow status-change int on battery-condition change)
 4      general wakeup enabled
 5      binary audio mode enabled on CAUDIO pin
 6      Pulse Width Modulation enabled on CAUDIO pin
        (CAUDIO state undefined if both bits 5 and 6 set)
 13-7   reserved (0)
 14     Wakeup mask (enable wakeup events via status-change pin)
 15     enable card interrupts via CINT# pin and wakeup events
 31-16  reserved
SeeAlso: #00890,#00892,#00894

Bitfields for CardBus Socket Present State Register:
Bit(s)  Description     (Table 00894)
 0      CSTSCHG pin asserted (status change)
 1      CCD1# (card detect 1) changed state
 2      CCD2# (card detect 2) changed state
 3      interface power cycle completed
 4      16-bit PC card inserted
 5      CardBus card inserted
 6      card's interrupt pin asserted
 7      card inserted but type can not be determined
 8      data may have been lost due to abrupt card removal
 9      attempted to apply Vcc voltage not supported by the card
 10     card can accept Vcc = 5.0 volts
 11     card can accept Vcc = 3.3 volts
 12     card can accept Vcc = X.X volts
 13     card can accept Vcc = Y.Y volts
 27-14  reserved (0)
 28     socket can accept Vcc = 5.0 volts
 29     socket can accept Vcc = 3.3 volts
 30     socket can accept Vcc = X.X volts
 31     socket can accept Vcc = Y.Y volts
Note:   bits 0-3 may be cleared by writing a 1 into the respective bits
SeeAlso: #00890,#00892,#00893,#00896

Bitfields for CardBus Socket Force Event Register:
Bit(s)  Description     (Table 00895)
 0      write-protect
 1      ready
 2      battery voltage detect 2
 3      battery voltage detect 1
 4      general wakeup
 14-5   reserved (0)
 15     enable card interrupts via CINT# pin
 31-16  reserved
Note:   this register can simulate events by forcing the values of some of the
          bits in the Event Mask Register; any bit of this register which is
          set to 1 forces the corresponding bit in the Mask Register to 1,
          while bits set to 0 leave the corresponding bit unchanged
SeeAlso: #00890,#00892,#00896

Bitfields for CardBus Socket Control Register:
Bit(s)  Description     (Table 00896)
 2-0    Vpp control
        000 power off
        001 12.0 Volts
        010 5.0 Volts
        011 3.3 Volts
        100 reserved (X.X Volts)
        101 reserved (Y.Y Volts)
        110 reserved
        111 reserved
 3      reserved (0)
 6-4    Vcc control (as for Vpp, but 12.0V not supported)
 31-7   reserved (0)
SeeAlso: #00890,#00893,#00895

Bitfields for TI PCI1130 Card Control Register:
Bit(s)  Description     (Table 00897)
 0      interrupt pending
 1      speaker output enabled
 2      reserved
 3      enable status-change interrupt routing (to INTA# for socket A, INTB#
          for socket B)
 4      function interrupt routed to corresponding PCI interrupt pin
 5      PCI interrupts enabled
 6      ZOOM video mode enabled
 7      Ring Indicator enabled on IRQ15/RI_OUT pin
SeeAlso: #00890,#00898

Bitfields for TI PCI1130 Device Control Register:
Bit(s)  Description     (Table 00898)
 0      reserved (0)
 2-1    interrupt mode enable
        00 no interrupt
        01 ISA mode (direct IRQ routing)
        10 serialized interrupt mode
        11 reserved
 4-3    reserved
 5      3volt Socket Capable force bit
 6      5volt Socket Capable force bit
 7      reserved
SeeAlso: #00890,#00897

Bitfields for PCI Configuration I/O base and limit:
Bit(s)  Description     (Table 00899)
 3-0    (read-only) address decoding type
        0000 16-bit
        0001 32-bit
        other reserved
 7-4    bits 15-12 of I/O address range
SeeAlso: #00878,#00900

Bitfields for PCI Configuration memory base and limit:
Bit(s)  Description     (Table 00900)
 3-0    address decode type
        0000 32-bit address decoder
        0001 64-bit address decoder
        other reserved
 15-4   bits 31-20 of memory address range
SeeAlso: #00878,#00899

Bitfields for PCI Configuration Bridge Control Register:
Bit(s)  Description     (Table 00901)
 7      enable fast back-to-back cycles on secondary bus
 6      reset secondary bus
 5      master abort mode on secondary bus
 4      reserved
 3      VGA enable (when set, forward VGA memory and I/O ranges to seconary
          bus)
 2      ISA enable
 1      reserved
 0      enable parity error response
SeeAlso: #00878,#01131

Format of OpenHCI Host Controller memory-mapped registers:
Offset  Size    Description     (Table 00902)
 00h    DWORD   "HcRevision"            OpenHCI revision (see #00903)
 04h    DWORD   "HcControl"             HC operating modes (see #00904)
 08h    DWORD   "HcCommandStatus"       command/status (see #00905)
 0Ch    DWORD   "HcInterruptStatus"     interrupt status (see #00906)
 10h    DWORD   "HcInterruptEnable"     enable interrupts (see #00907)
 14h    DWORD   "HcInterruptDisable"    disable interrupts (see #00907)
 18h    DWORD   "HcHCCA"                HC Communications Area (see #00908)
 1Ch    DWORD   "HcPeriodCurrentED"     Endpoint Descriptor addr (see #00909)
 20h    DWORD   "HcControlHeadED"       Control Endpoint Descriptor (see #00910)
 24h    DWORD   "HcControlCurrentED"    Control Endpoint Descriptor (see #00910)
 28h    DWORD   "HcBulkHeadED"          Bulk Endpoint Descriptor (see #00911)
 2Ch    DWORD   "HcBulkCurrentED"       Bulk Endpoint Descriptor (see #00911)
 30h    DWORD   "HcDoneHead"            last completed Xfer Descr. (see #00912)
 34h    DWORD   "HcFmInterval"          Frame bit-time interval (see #00913)
 38h    DWORD   "HcFmRemaining"         bit time remaining in Frame (see #00914)
 3Ch    DWORD   "HcFmNumber"            Frame Number (bits 15-0)
 40h    DWORD   "HcPeriodicStart"       earliest time to start periodic list
                                        (bits 13-0)
 44h    DWORD   "HcLSThreshold"         threshold for Low Speed transaction
                                        (bits 11-0)
 48h    DWORD   "HcRhDescriptorA"       Root Hub Descriptor A (see #00915)
 4Ch    DWORD   "HcRhDescriptorB"       Root Hub Descriptor B (see #00916)
 50h    DWORD   "HcRhStatus"            Root Hub status (see #00917)
 54h  N DWORDs  "HCRhPortStatus[1-N]"   Root Hub port status N (see #00918)
Note:   OpenHCI reserves a full 4K page of the systems address space for its
          memory-mapped registers
SeeAlso: #00878,#00882,#F0085,#00966

Bitfields for OpenHCI "HcRevision" register:
Bit(s)  Description     (Table 00903)
 31-8   reserved
 7-0    BCD OpenHCI specification number (10h = 1.0, 11h = 1.1)
Note:   this register is read-only
SeeAlso: #00902,#00904

Bitfields for OpenHCI "HcControl" register:
Bit(s)  Description     (Table 00904)
 31-11  reserved
 10     RWE     enable Remote Wakeup feature
 9      RWC     controller supports Remote Wakeup signalling
 8      IR      Interrupt Routing
                0 normal host bus interrupt
                1 System Managment Interrupt
 7-6    HCFS    USB Host Controller Functional State
                00 USBReset
                01 USBResume
                10 USBOperational
                11 USBSuspend
 5      BLE     enable Bulk List processing in next frame
 4      CLE     enable Control List processing in next frame
 3      IE      enable Isochronous ED processing
 2      PLE     enable processing of Periodic List in next frame
 1-0    CBSR    Control Bulk Service Ratio
                00  1:1 Control EDs:Bulk EDs served
                01  2:1
                10  3:1
                11  4:1
SeeAlso: #00902,#00903,#00905

Bitfields for OpenHCI "HcCommandStatus" register:
Bit(s)  Description     (Table 00905)
 31-18  reserved
 17-16  SOC     scheduling-overrun count
 15-4   reserved
 3      OCR     ownership change request is pending
 2      BLF     bulk list contains TDs
 1      CLF     control list contains TDs
 0      HCR     host controller software reset
Note:   writing a 1 bit sets the corresponding bit, while a 0 bit leaves the
          corresponding bit unchanged
SeeAlso: #00902,#00903,#00906

Bitfields for OpenHCI "HcInterruptStatus" register:
Bit(s)  Description     (Table 00906)
 31     reserved (0)
 30     OC      ownership change
 29-7   reserved
 6      RHSC    Root Hub status changed
 5      FNO     frame number overflowed
 4      UE      unrecoverable error
 3      RD      resume detected
 2      SF      start of frame
 1      WDH     writeback done
 0      SO      scheduling overrun
Note:   writing a 1 bit clears the corresponding bit of the register
SeeAlso: #00902,#00903,#00905,#00907

Bitfields for OpenHCI "HcInterruptEnable" and "HcInterruptDisable" registers:
Bit(s)  Description     (Table 00907)
 31     MIE     master interrupt enable
 30     OC      ownership change
 29-7   reserved
 6      RHSC    Root Hub status change
 5      FNO     frame number overflow
 4      UE      unrecoverable error
 3      RD      Resume Detect
 2      SF      start of frame
 1      WDH     HcDoneHead writeback
 0      SO      scheduling overrun
Note:   writing a 1 bit to HcInterruptEnable enables the corresponding
          interrupt, while writing a 1 bit to HcInterruptDisable disables it;
          zero bits are ignored.  On reading, both registers return the
          same value, which reflects the currently enabled interrupts
SeeAlso: #00902

Bitfields for OpenHCI "HcHCCA" register:
Bit(s)  Description     (Table 00908)
 31-8   physical address of Host Controller Communications Area (bits 31-8)
 7-0    reserved (0)
Note:   the required alignment for the HCCA may be determined by writing
          FFFFFFFFh to this register and determining the number of low-order
          zero bits
SeeAlso: #00902,#00909,#00910

Bitfields for OpenHCI "HcPeriodCurrentED" register:
Bit(s)  Description     (Table 00909)
 31-4   physical address of current Isochronous/Interrupt Endpoint Descriptor
          (bits 31-4)
 3-0    reserved (0)
SeeAlso: #00902,#00908,#00910

Bitfields for OpenHCI "HcControlHeadED"/"HcControlCurrentED" register:
Bit(s)  Description     (Table 00910)
 31-4   physical address of first/current Endpoint Descriptor (bits 31-4)
 3-0    reserved (0)
Note:   HcControlCurrentED is set to 0000000h to indicate the end of the
          Control list
SeeAlso: #00902,#00908,#00909

Bitfields for OpenHCI "HcBulkHeadED"/"HcBulkCurrentED" register:
Bit(s)  Description     (Table 00911)
 31-4   physical address of first/current Endpoint Descriptor in the Bulk
          list (bits 31-4)
 3-0    reserved (0)
Note:   HcBulkCurrentED is set to 0000000h to indicate the end of the Bulk
          list
SeeAlso: #00902,#00908,#00910

Bitfields for OpenHCI "HcDoneHead" register:
Bit(s)  Description     (Table 00912)
 31-4   physical address of most-recently completed Transfer Descriptor added
          to the Done queue (bits 31-4)
 3-0    reserved (0)
SeeAlso: #00902,#00909,#00911

Bitfields for OpenHCI "HcFmInterval" register:
Bit(s)  Description     (Table 00913)
 31     "FIT"   toggled each time a new value is loaded into bits 13-0
 30-16  "FSMPS" largest data packet in bits
 15-14  reserved
 13-0   "FI"    Frame Interval (between to consecutive SOFs)
SeeAlso: #00902,#00914

Bitfields for OpenHCI "HcFmRemaining" register:
Bit(s)  Description     (Table 00914)
 31     "FRT"   loaded from bit 31 of HcFmInterval whenever FR reaches 0
 30-14  reserved
 13-0   "FR"    FrameRemaining -- bits times left in current frame
SeeAlso: #00902,#00913

Bitfields for OpenHCI "HcRhDescriptorA" register:
Bit(s)  Description     (Table 00915)
 31-24  "POTPGT" power-on to power-good time in 2ms units
 23-13  reserved
 12     "NOCP"  no over-current protection supported
 11     "OCPM"  over-current status reported per-port
 10     "DT"    device type - is root hub compound device?
 9      "NPS"   NoPowerSwitching -- ports are always powered up
 8      "PSM"   power-switching mode -- if set, each port powered individually
 7-0    "NDP"   number of downstream ports
SeeAlso: #00902,#00916,#00917

Bitfields for OpenHCI "HcRhDescriptorB" register:
Bit(s)  Description     (Table 00916)
 31-16  "PPCM"  PortPowerControlMask -- bitmask of ports NOT affected by global
                  power control (bit 16 [port #0] is reserved)
 15-0   "DR"    DeviceRemovable -- bitmap of removable devices
SeeAlso: #00902,#00915,#00917

Bitfields for OpenHCI "HcRhStatus" register:
Bit(s)  Description     (Table 00917)
 31     "CRWE"  Clear Remote Wakeup Enable
                write 1 to disable remote wakeup (writes of 0 ignored)
 30-18  reserved
 17     "OCIC"  OverCurrent Indicator Change
                write 1 to clear
 16   R "LPSC"  Local Power Status Change
      W         Set Global Power mode (write 1; writes of 0 ignored)
 15     "DRWE"  Device Remote Wakeup Enable
                write 1 to enable (writes of 0 ignored)
                read to get current status
 14-2   reserved
 1      "OCI"   OverCurrent Indicator
 0    R "LPS"   LocalPowerStatus (always 0 for Root Hub)
      W         write 1 to turn off power to all ports/ports with clear
                  PortPowerControlMask bits
SeeAlso: #00902,#00915,#00916,#00918

Bitfields for OpenHCI "HcRhPortStatusN" register:
Bit(s)  Description     (Table 00918)
 31-21  reserved
 20     "PRSC"  Port Reset Status Change (write '1' to clear)
 19     "OCIC"  Port OverCurrent Indiactor Change (write '1' to clear)
 18     "PSSC"  Port Suspend Status Change (write '1' to clear)
 17     "PESC"  Port Enable Status Change (write '1' to clear)
 16     "CSC"   Connect Status Change (write '1' to clear)
 15-10  reserved
 9    R "LSDA"  Low Speed Device Attached
      W         clear port power by writing '1'
 8    R "PPS"   Port Power Status
      W         set port power by writing '1'
 7-5    reserved
 4    R "PRS"   Port Reset Status
      W         set port reset by writing '1'
 3    R "POCI"  Port OverCurrent Indicator
      W         clear suspend status by writing '1'
 2    R "PSS"   Port Suspend Status
      W         set port suspend by writing '1'
 1    R "PES"   Port Enable Status
      W         set port enable by writing '1'
 0    R "CCS"   current connect status
      W         clear port enable by writing '1'
SeeAlso: #00902,#00915,#00916,#00917
--------X-1AB10ASF1004-----------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION DWORD (VLSI devices)
        AX = B10Ah subfn 1004h
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh) (see #00878)
Return: CF clear if successful
            ECX = dword read
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B10Ah,AX=B10Ah/SF=8086h

Format of PCI Configuration Data for VLSI VL82C591 Host/PCI bridge:
Offset  Size    Description     (Table 00919)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 1004h, device ID 0005h)
 40h    BYTE    bus number
 41h    BYTE    subordinate bus number
 42h    WORD    reserved
 44h  4 DWORDs  reserved
 54h  2 BYTEs   device-specific configuration registers
 56h    WORD    reserved
 58h  2 BYTEs   device-specific configuration registers
 5Ah    WORD    reserved
 5Ch  5 BYTEs   device-specific configuration registers
        ...
 FFh    BYTE    device-specific configuration register
SeeAlso: #00878,#00732,#00920

Format of PCI Configuration data for VLSI VL82C593 PCI/ISA bridge:
Offset  Size    Description     (Table 00920)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 1004, device ID 0006h)
 40h  4 DWORDs  reserved
 50h 11 BYTEs   device-specific configuration registers
 5Bh    BYTE    reserved
 5Ch 25 BYTEs   device-specific configuration registers
 75h 138 BYTEs  reserved
 FFh    BYTE    device-specific configuration register
SeeAlso: #00878,#00919
--------X-1AB10ASF100B-----------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION DWORD (National Semicond. device)
        AX = B10Ah subfn 100Bh
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh) (see #00878)
Return: CF clear if successful
            ECX = dword read
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B10Ah,AX=B10Ah/SF=8086h

Format of National Semiconductor PC87410 EIDE Controller configuration:
Offset  Size    Description     (Table 00921)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 100Bh, device ID D001h)
 10h    DWORD   I/O base address for channel 0 control ports (def: 01F0h)
 14h    DWORD   I/O base address for channel 0 status port (def: 03F6h)
 18h    DWORD   I/O base address for channel 1 control ports (def: 0170h)
 1Ch    DWORD   I/O base address for channel 1 status port (def: 0376h)
 40h    BYTE    IDE Channel 0 timing control
 41h    WORD    IDE Channel 0 read-ahead counter (write-only except bit 15)
 43h    BYTE    IDE Channel 0 function
 44h    BYTE    IDE Channel 1 timing control
 45h    WORD    IDE Channel 1 read-ahead counter (write-only except bit 15)
 47h    BYTE    IDE Channel 1 function
 48h    BYTE    PCI control
 49h  7 BYTEs   unused
 50h 176 BYTEs  ??? (unused?)
!!!http://www.national.com/ds/PC/PC87410.pdf p.7
SeeAlso: #00739,#00922

Format of National Semiconductor PC87415 IDE DMA-Master configuration:
Offset  Size    Description     (Table 00922)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 100Bh, device ID 0002h)
 40h  3 BYTEs   control register
 43h    BYTE    write buffer status (read-only)
 44h    BYTE    Channel 1 master read timing
 45h    BYTE    Channel 1 master write timing
 48h    BYTE    Channel 1 slave read timing
 49h    BYTE    Channel 1 slave write timing
 4Ch    BYTE    Channel 2 master read timing
 4Dh    BYTE    Channel 2 master write timing
 50h    BYTE    Channel 2 slave read timing
 51h    BYTE    Channel 2 slave write timing
 54h    BYTE    command and control block timing
 55h    BYTE    sector size
!!!http://www.national.com/ds/PC/PC87415.pdf p.8
SeeAlso: #00739,#00921
--------X-1AB10ASF1011-----------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION DWORD (DEC device)
        AX = B10Ah subfn 1011h
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh) (see #00878)
Return: CF clear if successful
            ECX = dword read
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B10Ah,AX=B10Ah/SF=8086h

Format of DEC DC21140/DC21040/DC21041 Tulip {Fast/Plus} Ethernet:
Offset  Size    Description     (Table 00923)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 1011h, device ID 0014h)
 10h    DWORD   base I/O port for access to control/status registers
 14h    DWORD   base memory address for access to control/status registers
 40h    DWORD   configuration driver area
                bit 31: sleep mode   \ only one of bits 31,30 may be set
                bit 30: snooze mode  /
                bits 15-8: device driver's use
!!!digital\21041hm.pdf p.34   digital\21140ahm.pdf p.35
SeeAlso: #00742

Format of DEC 21052 PCI-PCI bridge PCI configuration data:
Offset  Size    Description     (Table 00924)
 00h 64 BYTEs   header, type 1 (see #00878)
                (vendor ID 1011h, device ID 0021h)
 40h    BYTE    chip control
 41h    BYTE    diagnostic control
 42h    BYTE    burst counter
 43h    BYTE    SErr disable
 44h    BYTE    primary target wait timer
 45h    BYTE    secondary target wait timer
 46h  2 BYTEs   reserved
 48h    DWORD   count of secondary write attempts
 4Ch    DWORD   count of primary write attempts
 50h 44 DWORDs  reserved
!!!digital\21052ds.pdf p.117
SeeAlso: #00742
--------X-1AB10ASF1022-----------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION DWORD (AMD devices)
        AX = B10Ah subfn 1022h
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh) (see #00878)
Return: CF clear if successful
            ECX = dword read
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B10Ah,AX=B10Ah/SF=1042h,AX=B10Ah/SF=8086h

Format of AMD Am53C974A PC-SCSI PCI configuration data:
Offset  Size    Description     (Table 00925)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 1022h, device ID 2020h)
 10h    DWORD   I/O base address (see PORT xxxxh"Am53C974A")
 40h 16 BYTEs   scratch registers
                (used by AMD's PC-SCSI drivers as follows:
                    40h/41h  SCSI configuration register 0 (see #00926,#00927)
                    ...
                    4Eh/4Fh  SCSI configuration register 7)
SeeAlso: #00747

Bitfields for AMD Am53C974A Target Device Configuration Register:
Bit(s)  Description     (Table 00926)
 15-14  reserved
 13     "FSCSI" Fast SCSI drive is present
 12-8   "SPD" synchronous period
 7-4    synchronous offset (0 = asynchronous transfers)
 3-1    SCSI bus status
 0      target device is present and active
        if 0, all other bits must be cleared to zero for target devices
SeeAlso: #00925,#00927

Bitfields for AMD Am53C974A Host Configuration Register:
Bit(s)  Description     (Table 00927)
 15-9   reserved
 8      SCSI bus has been reset
 7      starting BIOS number (bits 6-4) is valid
 6-4    starting BIOS number (000 = BIOS drive 80h, 001 = drive 81h, etc)
 3      this device is a SCSI host
 2      protected-mode driver initialized
 1      real-mode driver initialized
 0      target device present
        =0 indicates that this is a host if bit 3 is set
SeeAlso: #00925,#00926
--------X-1AB10ASF1042-----------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION DWORD (PC Technology devices)
        AX = B10Ah subfn 1042h
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh) (see #00878)
Return: CF clear if successful
            ECX = dword read
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B10Ah,AX=B10Ah/SF=1022h,AX=B10Ah/SF=1045h,AX=B10Ah/SF=8086h

Format of PCI Configuration data for PC Technology RZ-1000 EIDE controller:
Offset  Size    Description     (Table 00928)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 1042h, device ID 1000h)
 10h    DWORD   base address for controller I/O registers
                (set to 01F1h for primary controller, 0171h for secondary)
 14h    DWORD   base address for controller digital I/O port
                (set to 03F5h for primary, 0375h for secondary)
 40h    DWORD   ???
                bits 7-1: ???
                bit 13: read-ahead mode enabled
                        (Read-Ahead is buggy on original RZ-1000, and is
                          thus typically disabled by clearing this bit)
                bit 16: ???
 44h    DWORD   ???
 48h  8 BYTEs   ???
 50h 176 BYTEs  unused???
--------X-1AB10ASF1045-----------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION DWORD (OPTi devices)
        AX = B10Ah subfn 1045h
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh) (see #00878)
Return: CF clear if successful
            ECX = dword read
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B10Ah,AX=B10Ah/SF=1042h,AX=B10Ah/SF=1066h

Format of PCI Configuration data for OPTi 82C750 Vendetta (device 0):
Offset  Size    Description     (Table 00929)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 1045h, device ID C567h)
 40h    DWORD   memory control (see #00930)
 44h  6 BYTEs   data path control (see #00931)
 4Ah    WORD    reserved
 4Ch    BYTE    SDRAM SDRAS/SDCAS mux control (see #00932)
 4Dh    BYTE    SDRAM select (see #00933)
 4Eh    BYTE    ECC test / I2C control (see #00934)
 4Fh    BYTE    ECC test data
 50h    DWORD   ECC control (see #00935)
 54h    WORD    SDRAM select (see #00936)
 56h    BYTE    data path control / EDO X-2-2-2 writes (see #00937)
 57h    BYTE    reserved
 58h    DWORD   ECC reporting (see #00938)
 5Ch 164 BYTEs  reserved
SeeAlso: #00878,#00939,#00965

Bitfields for OPTi 82C750 Vendetta (device 0) memory control:
Bit(s)  Description     (Table 00930)
 31-30  reserved
 29     reserved (1)
 28-18  reserved
 17     reserved (1)
 16     HA drive-back during CPU memory access enable
 15-6   PCI video frame buffer write posting hole
 5-4    reserved
 3      PCI bus write post disable
 2      video frame buffer write post (posting enabled if bit 2 = bit 3)
 1      video memory write post(posting enabled if bit 1 = bit 3)
 0      I/O cycle write post enable
SeeAlso: #00929,#00931

Bitfields for OPTi 82C750 Vendetta (device 0) data path control:
Bit(s)  Description     (Table 00931)
 41-47  reserved
 40     DTY pin suspend enable
 39-38  reserved
 37     SDRAM refresh 0 sized bank RAS# disable
 36     SDRAM control signal stepping enable
 35     reserved
 34-32  SDRAM mode
        000 = normal
        001 = NOP enable
        010 = precharge all banks
        011 = mode register enable
        100 = CBR cycle enable
        101-111 = reserved
 31     SDRAM memory read access enable
 30     CPU-to-PCI FIFO clear enable
 29     PCI-to-DRAM FIFO clear enable
 28     CPU-to-DRAM FIFO clear enable
 27     82C750 register write disable
 26-15  reserved
 14     PCI master/ECC generate NMI disable
 13-12  reserved (1)
 11     memory parity checking enable
 10     reserved
 9      CPU DRAM write byte merge enable
 8      MD bus pull-up resistor disable
 7      PCI CPU write 6DW FIFO enable
 6      DRAM PCI read 24DW FIFO enable
 5      DRAM PCI write 24DW FIFO enable
 4      DRAM CPU write 8QW FIFO enable
 3      82C750 memory read access (0 = SDRAM, 1 = reserved)
 2-1    reserved
 0      82C750 memory read access (0 = FP mode, 1 = EDO/SDRAM)
SeeAlso: #00929

Bitfields for OPTi 82C750 Vendetta (device 0) SDRAM SDRAS/SDCAS mux control:
Bit(s)  Description     (Table 00932)
 7      MCACHE enable
 6      GWE#/BWE# (1)
 5      reserved (read-only)
 4      reserved (1)
 3      BOFF# CPU status latch enable
 2      reserved (1) (SDRAS# & SDCAS#)
 1      reserved (1) (BA1 & BA0)
 0      pin mux
        0 = RAS4# & RAS5#
        1 = SDRAS# & SDCAS#
SeeAlso: #00929

Bitfields for OPTi 82C750 Vendetta (device 0) SDRAM select:
Bit(s)  Description     (Table 00933)
 7-6    reserved
 5      bank 5 enable
 4      bank 4 enable
 3-0    reserved
SeeAlso: #00929

Bitfields for OPTi 82C750 Vendetta (device 0) ECC test / I2C control:
Bit(s)  Description     (Table 00934)
 7      ECC test mode enable
 6      reserved
 5      reserved (1 if SDRAM enabled)
 4      I2C data output read-back (read-only)
 3      I2C clock output read-back (read-only)
 2      I2C data output (refer to file I2C.LST for more details)
 1      I2C clock output
 0      I2C control enable
SeeAlso: #00929,I2C A0h,#00935

Bitfields for OPTi 82C750 Vendetta (device 0) ECC control:
Bit(s)  Description     (Table 00935)
 31-13  upper 19 bits of error address
 12-5   syndrome byte for reported error
 4      non-correctable error
 3      single-bit error
 2      nibble error
 1      ECC error report enable
 0      ECC data path enable
SeeAlso: #00929,#00934

Bitfields for OPTi 82C750 Vendetta (device 0) SDRAM select:
Bit(s)  Description     (Table 00936)
 15     SDWE# stepping enable
 14     reserved (1) (SDRAM)
 13-12  reserved
 11-6   bank 5-0 SDRAM technology
        0 = 16 Mb
        1 = 64 Mb
 5-0    bank 5-0 SDRAM timing
        0 = leadoff 7/6
        1 = leadoff 8/7
SeeAlso: #00929

Bitfields for OPTi 82C750 Vendetta (device 0) data path control / EDO X-2-2-2:
Bit(s)  Description     (Table 00937)
 7      CPU-to-DRAM FIFO enable
 6      1 CLK CAS enable
 5-0    RAS5#-RAS0# X-2-2-2 write enable
        (CPU-to-DRAM FIFO, DRAM write post, and cache readaround write must
          be enabled)
SeeAlso: #00929

Bitfields for OPTi 82C750 Vendetta (device 0) ECC reporting:
Bit(s)  Description     (Table 00938)
 31-26  reserved
 25-16  single-bit error counter
 15     reserved
 14     delayed write enable
 13-4   single-bit error limit
 3      correctable error reporting (0 = NMI, 1 = SMI)
 2      single-bit error counter enable (disabling resets counter)
 1      error reporting method (0 = NMI, 1 = SMI)
 0      NMI/SMI generate disable
SeeAlso: #00929

Format of PCI Configuration data for OPTi 82C750 Vendetta (device 1):
Offset  Size    Description     (Table 00939)
 00h 64 BYTEs   header (see #00824)
                (vendor ID 1045h, device ID C568h)
 40h    WORD    keyboard control (see #00940)
 42h    WORD    interrupt control (see #00941)
 44h    BYTE    pin functionality 1 (see #00942)
 45h    BYTE    reserved
 46h    WORD    cycle control (see #00943)
 48h    WORD    pin functionality 2 (see #00944)
 4Ah    WORD    ROMCS# range control (see #00945)
 4Ch    BYTE    miscellaneous control 1 (see #00946)
 4Dh    BYTE    reserved
 4Eh    BYTE    miscellaneous control 2 (see #00947)
 4Fh    BYTE    miscellaneous control 3 (see #00948)
 50h    WORD    interrupt trigger control (see #00949)
 52h    WORD    interrupt multiplexing control (see #00950)
 54h    WORD    PCI master control (see #00951)
 56h    WORD    serial interrupt source (see #00952)
 58h    BYTE    serial interrupt mode control (see #00953)
 59h    BYTE    pin functionality 3 (see #00954)
 5Ah    WORD    distributed DMA master base address
 5Ch    BYTE    distributed DMA control (see #00955)
 5Dh  3 BYTEs   reserved
 60h    BYTE    USB interrupt control register (see #00956)
 61h    BYTE    PCI reset control (see #00957)
 62h    BYTE    emulation control (see #00958)
 63h    BYTE    PCI retry control (see #00959)
 64h 153 BYTEs  reserved
 FDh    BYTE    SMI control
 FEh    BYTE    stop grant cycle control
 FFh    BYTE    host memory parity error
SeeAlso: #00878,#00929,#00965

Bitfields for OPTi 82C750 Vendetta (device 1) keyboard control:
Bit(s)  Description     (Table 00940)
 15     keyboard port read (read-only)
 14     keyboard port write (read-only)
 13     keyboard RESET CPUINIT
        0 = generate immediately
        1 = wait for halt
 12     keyboard emulation disable
 11-9   PIRQ3# IRQ generation
        000 = use interrupt trigger control register (offset 50h)
        001 = IRQ5
        010-101 = IRQ9-IRQ12
        110-111 = IRQ14-IRQ15
 8-6    PIRQ2# IRQ generation
 5-3    PIRQ1# IRQ generation
 2-0    PIRQ0# IRQ generation
SeeAlso: #00939,#00941

Bitfields for OPTi 82C750 Vendetta (device 1) interrupt control:
Bit(s)  Description     (Table 00941)
 15     ISA IRQ14 blocking enable
 14     ISA IRQ15 blocking enable
 13     DMA/ISA master to preempt PCI master enable
 12     PCI priority is fixed instead of rotating
 11-10  back-to-back ISA I/O delay 
        00 = 3 ATCLKs
        01 = 12 ATCLKs
        10 = no delay
        11 = delay all by 12 ATCLKs
 9      PCI master ISA device access disable
 8      ISA bus control signals for memory access >16M and I/O access >64K
          disable
 7-6    IRQ15-IRQ14 triggering (0 = edge, 1 = level)
 5-2    IRQ12-IRQ9 triggering (0 = edge, 1 = level)
 1      IRQ 5 triggering (0 = edge, 1 = level)
 0      pin AE16 functionality
        0 = DREQ6
        1 = EPMI0#
SeeAlso: #00939,#00940

Bitfields for OPTi 82C750 Vendetta (device 1) pin functionality 1:
Bit(s)  Description     (Table 00942)
 7-6    pin AC15 functionality
        00-01 = controlled by bits 1-0
        10 = DACK7#
        11 = reserved
 5-4    pin AE15 functionality
        00-01 = controlled by bits 1-0
        10 = DACK6#
        11 = reserved
 3-2    pin AF15 functionality
        00-01 = controlled by bits 1-0
        10 = DACK5#
        11 = reserved
 1-0    DACK group-wise programmable pin functionalities
        00 = DACK3#-DACK0#
        01 = DACK7#-DACK5#, DACK3#, DACK1#, DACK0#
        10 = reserved
        11 = EDACK2#-EDACK0#, EDACKEN#, PIRQ3#, PIRQ2#
SeeAlso: #00939

Bitfields for OPTi 82C750 Vendetta (device 1) cycle control:
Bit(s)  Description     (Table 00943)
 15     ISA bus ROM write enable
 14     hidden refresh enable
 13-12  ATCLK select
        00 = LCLK/4
        01 = LCLK/3
        10 = LCLK/2
        11 = LCLK
 11     CPU master to PCI slave write
        0 = 1 LCLK
        1 = 0 LCLK
 10-8   PCI master to PCI master preempt timer
        000 = no preempt
        001 = 260 LCLKs
        010 = 132 LCLKs
        011 = 68 LCLKs
        100 = 36 LCLKs
        101 = 20 LCLKs
        110 = 12 LCLKs
        111 = 5 LCLKs
 7      reserved
 6      XDIR achieve
        0 = accessing ROM, keyboard controller, RTC
        1 = accessing ROM, NVRAM
 5      PERR# to SERR# conversion enable
 4      address parity checking enable
 3      target abort SERR# generation enable
 2      fast back-to-back enable
 1      sample point decoding
        0 = slow
        1 = subtractive
 0      reserved
SeeAlso: #00939

Bitfields for OPTi 82C750 Vendetta (device 1) pin functionality 2:
Bit(s)  Description     (Table 00944)
 15     pin AF18 functionality (0 = IRQ15, 1 = reserved)
 14-13  pin AE19 functionality (00-01 = IRQ12, 10-11 = reserved)
 12     pin AD20 functionality (0 = IRQ10, 1 = MIRQ10/12)
 11     pin AE21 functionality (0 = IRQ6, 1 = reserved)
 10     pin AD22 functionality (0 = IRQ4, 1 = MIRQ4/6)
 9-8    pin AD16 functionality (00 = DREQ7, 01 = EPMI3#, 1x = reserved)
 7-6    pin AD17 functionality
        00 = DREQ3
        01 = DREQ3/7
        10 = DREQ7
        11 = reserved
 5-4    pin AD18 functionality
        00 = DREQ1
        01 = DREQ1/6
        10 = DREQ6
        11 = reserved
 3-2    pin AE18 functionality
        00 = DREQ0
        01 = DREQ0/5
        10 = DREQ5
        11 = reserved
 1-0    pin T23 functionality (0x = PREQ1#, 1x = reserved)
SeeAlso: #00939

Bitfields for OPTi 82C750 Vendetta (device 1) ROMCS# range control:
Bit(s)  Description     (Table 00945)
 15     FFFF8000h-FFFFFFFFh ROMCS# disable
 14     FFFF0000h-FFFF7FFFh ROMCS# disable
 13     FFFE8000h-FFFEFFFFh ROMCS# enable
 12     FFFE0000h-FFFE7FFFh ROMCS# enable
 11     FFFD8000h-FFFDFFFFh ROMCS# enable
 10     FFFD0000h-FFFD7FFFh ROMCS# enable
 9      FFFC8000h-FFFCFFFFh ROMCS# enable
 8      FFFC0000h-FFFC7FFFh ROMCS# enable
 7      F8000h-FFFFFh ROMCS# disable
 6      F0000h-F7FFFh ROMCS# disable
 5      E8000h-EFFFFh ROMCS# enable
 4      E0000h-E7FFFh ROMCS# enable
 3      D8000h-DFFFFh ROMCS# enable
 2      D0000h-D7FFFh ROMCS# enable
 1      C8000h-CFFFFh ROMCS# enable
 0      C0000h-C7FFFh ROMCS# enable
SeeAlso: #00939

Bitfields for OPTi 82C750 Vendetta (device 1) miscellaneous control 1:
Bit(s)  Description     (Table 00946)
 7-5    reserved
 4      game port/MPU-401 enable
 3      PREQ4#/PGNT4# mux (0 = SDA2/GP3, 1 = PREQ4#/PGNT4#)
 2      DACK5# 1-to-0 transition enable
 1-0    reserved
SeeAlso: #00939,#00947,#00948

Bitfields for OPTi 82C750 Vendetta (device 1) miscellaneous control 2:
Bit(s)  Description     (Table 00947)
 7-4    reserved
 3      pipeline byte merge enable
 2      EOP configuration (0 = output, 1 = input)
 1      byte merge enable
 0      ISA master data swap disable
SeeAlso: #00939,#00946,#00948

Bitfields for OPTi 82C750 Vendetta (device 1) miscellaneous control 3:
Bit(s)  Description     (Table 00948)
 7      pin AB15 functionality
        0 = DACK5#
        1 = PPWRL+PPWRL2
 6      IDE functionality support enable
 5      reserved (read-only)
 4      ISA bus AT command 1 wait state extension disable
 3-2    reserved
 1      pin AE14 functionality
        0 = controlled by offset 44h bits 1-0
        1 = GPCS2#
 0      reserved
SeeAlso: #00939,#00946,#00947

Bitfields for OPTi 82C750 Vendetta (device 1) interrupt trigger control:
Bit(s)  Description     (Table 00949)
 15     reserved (1)
 14     reserved
 13     pin AD15 functionality (0 = DACK2#, 1 = GPCS2#)
 12-11  reserved
 10     IRQ3 triggering (0 = edge, 1 = level)
 9      IRQ4 triggering (0 = edge, 1 = level)
 8      IRQ7 triggering (0 = edge, 1 = level)
 7-6    IRQ generation when PIRQ3# triggered
        00 = disable
        01 = IRQ3
        10 = IRQ4
        11 = IRQ7
 5-4    IRQ generation when PIRQ2# triggered
        00 = disable
        01 = IRQ3
        10 = IRQ4
        11 = IRQ7
 3-2    IRQ generation when PIRQ1# triggered
        00 = disable
        01 = IRQ3
        10 = IRQ4
        11 = IRQ7
 1-0    IRQ generation when PIRQ0# triggered
        00 = disable
        01 = IRQ3
        10 = IRQ4
        11 = IRQ7
SeeAlso: #00939,#00950

Bitfields for OPTi 82C750 Vendetta (device 1) interrupt multiplexing control:
Bit(s)  Description     (Table 00950)
 15     pin functionality
        0 = AE22:IRQ3, AF21:IRQ5, AE21:IRQ6, AD21:IRQ7, AE20:IRQ9, AF19:IRQ11
        1 = AE22:MIRQ3/5, AF21:MIRQ7/9, AE21:MIRQ11/15, 
            AD21:EPMI1#, AE20:EPMI2#, AF19:GMIRQ
 14     pin R22 functionality (0 = PREQ2#, 1 = EPMI0#)
 13     IRQ1 latching enable
 12     IRQ12 latching enable
 11     DACKEN# status (0 = active low, 1 = active high)
 10     system bus owned by external device
 9      flash ROM locking enable
 8      reserved
 7      IRQ6 triggering (0 = edge, 1 = level)
 6-3    IRQ generation when GMIRQ triggered
        0000 = disabled
        0001-0010 = reserved
        0011-0111 = IRQ3-IRQ7
        1000 = reserved
        1001-1100 = IRQ9-IRQ12
        1101 = reserved
        1110-1111 = IRQ14-IRQ15
 2      reserved (1)
 1      priority scheme enable
 0      concurrent refresh and IDE cycle enable
SeeAlso: #00939,#00949

Bitfields for OPTi 82C750 Vendetta (device 1) PCI master control:
Bit(s)  Description     (Table 00951)
 15-12  reserved
 11     interrupt request register recover enable
 10     DMA address and counter (0 = current, 1 = base)
 9      CPU/PCI master access ISA cycle retry enable
 8      CPU-to-PCI cycle AHOLD signal use enable
        (used only when bit 4 = 1)
 7      PCI master X-1-1-1 write enable
 6      PCI master X-1-1-1 read enable
 5      concurrent PCI master/IDE enable
 4      new AHOLD protocol enable
 3      PCI master non-contiguous byte enable
 2      reserved
 1      simultaneous hardware PMU and IDE function operation enable
 0      ISA refresh disable
SeeAlso: #00939

Bitfields for OPTi 82C750 Vendetta (device 1) serial interrupt source:
Bit(s)  Description     (Table 00952)
 15-3   IRQ15-IRQ3 interrupt resource (0 = ISA, 1 = serial interrupt)
 2      SMI#, IOCHK#, PCIRQ3#-PCIRQ0# interrupt resource
        0 = ISA
        1 = serial interrupt
 1-0    IRQ1-IRQ0 interrupt resource (0 = ISA, 1 = serial interrupt)
SeeAlso: #00939,#00953

Bitfields for OPTi 82C750 Vendetta (device 1) serial interrupt mode control:
Bit(s)  Description     (Table 00953)
 7-6    serial interrupt control mode
        00 = continuous
        01 = idle
        1x = active
 5      reserved
 4      data frame slot support
        0 = 17 slots (IRQ15-IRQ3, IRQ1-IRQ0, SMI#, IOCHK#)
        1 = 21 slots (IRQ15-IRQ3, IRQ1-IRQ0, SMI#, IOCHK#, PCIRQ3#-PCIRQ0#)
 3-2    CPU access PCI priority
        00 = lowest
        01 = higher after 4 PCI master grants
        10 = higher after 2 PCI master grants
        11 = higher after 3 PCI master grants
 1-0    serial interrupt start frame pulse width in continuous/active mode
        00 = 4/3 CLK
        01 = 6/5 CLK
        10 = 8/7 CLK
        11 = reserved
SeeAlso: #00939,#00952

Bitfields for OPTi 82C750 Vendetta (device 1) pin functionality 3:
Bit(s)  Description     (Table 00954)
 7      PCI arbitration time-out mode enable
 6      0 wait state for CPU I/O access enable
 5      SMI output disable
 4      CPU request for PCI bus (0 = enabled, 1 = reserved)
 3      reserved
 2      refresh preemption disable
 1-0    reserved
SeeAlso: #00939

Bitfields for OPTi 82C750 Vendetta (device 1) distributed DMA control:
Bit(s)  Description     (Table 00955)
 7-5    channel 7-5 enable
 4-1    channel 3-0 enable
 0      DDMA enable
SeeAlso: #00939

Bitfields for OPTi 82C750 Vendetta (device 1) USB interrupt control register:
Bit(s)  Description     (Table 00956)
 7      reserved
 6-5    buffered DMA control
        00 = original DMA with old protocol
        01 = reserved
        10 = original DMA with PCI master capability
        11 = buffered DMA enable
 4      reserved
 3-0    IRQ generation when USBIRQ triggered
        0000 = disabled
        0001-0010 = reserved
        0011-0111 = IRQ3-IRQ7
        1000 = reserved
        1001-1100 = IRQ9-IRQ12
        1101 = reserved
        1110-1111 = IRQ14-IRQ15
SeeAlso: #00939

Bitfields for OPTi 82C750 Vendetta (device 1) PCI reset control:
Bit(s)  Description     (Table 00957)
 7      PCI soft reset generate enable
 6      PCI slave demand mode buffered DMA retry fix enable
 5      IORDY# PCI master delay fix enable
 4      ISA command deassertion IOCHRDY delay
        0 = <1 ATCLK
        1 = >=1 ATCLK
 3-2    buffered DMA fix (00 = disable, 11 = enable)
 1      reserved
 0      ISA master synchronization (1)
SeeAlso: #00939

Bitfields for OPTi 82C750 Vendetta (device 1) emulation control:
Bit(s)  Description     (Table 00958)
 7      PCIRST# disable
 6      SDA2 muxed with XDIR    (0 = XDIR, 1 = SDA2)
 5      SPKR muxed with MIDI1   (0 = MIDI1, 1 = SPKR)
 4      audio mux               (0 = MP7-MP0, DACK)
 3      audio module enable
 2      ATA-33 IDE pin mux scheme (0 = old, 1 = new)
 1      REFRESH priority        (0 = high, 1 = lowest)
 0      port 92h emulation disable
SeeAlso: #00939,PORT 0092h

Bitfields for OPTi 82C750 Vendetta (device 1) PCI retry control:
Bit(s)  Description     (Table 00959)
 7-2    reserved
 1      reserved (1)
 0      ISA slave PCI master retry
        0 = no change
        1 = generate BOFF#
SeeAlso: #00939

Format of PCI Configuration data for OPTi 82C750 Vendetta (IDE controller):
Offset  Size    Description     (Table 00960)
 00h 64 BYTEs   header (see #00824)
                (vendor ID 1045h, device ID C621h)
 40h    BYTE    IDE initialization control (see #00961)
 41h    BYTE    reserved
 42h    BYTE    IDE enhanced feature (see #00962)
 43h    BYTE    IDE enhanced mode (see #00963)
 44h    WORD    ultra DMA mode select (see #00964)
 46h 186 BYTEs  reserved

Bitfields for OPTi 82C750 Vendetta (IDE Controller) IDE initialization control:
Bit(s)  Description     (Table 00961)
 7-6    bus master IDE PCI bus request when FIFO filled with
        00 = 32 bytes (early request disabled)
        01 = 30 bytes
        10 = 28 bytes
        11 = 26 bytes
 5      reserved (1)
 4      reserved
 3      secondary IDE disable
 2      I/O addresses relocatable
 1-0    IDE device default cycle time
        00 = >=600ns (PIO mode 0)
        01 = >=383ns (PIO mode 2)
        10 = >=240ns (PIO mode 1)
        11 = >=180ns (PIO mode 3)
SeeAlso: #00960

Bitfields for OPTi 82C750 Vendetta (IDE Controller) IDE enhanced feature:
Bit(s)  Description     (Table 00962)
 7      reserved
 6      IDE write concurrency enable
 5      slave IDE FIFO to ISA bus preemption disable
 4      IDE arbiter PCI/IDE concurrency support enable
 3      PCI memory commands enable
 2      PCI master IDE and IDE cycle concurrency enable
 1      PCI master X-1-1-1 MIDE enable
 0      reserved
SeeAlso: #00960,#00963

Bitfields for OPTi 82C750 Vendetta (IDE Controller) IDE enhanced mode:
Bit(s)  Description     (Table 00963)
 7-6    secondary IDE drive 1 enhanced mode
        00 = disabled
        01 = command recovery in 1 LCLK
        10 = command recovery in 0 LCLK
        11 = reserved
 5-4    secondary IDE drive 0 enhanced mode
        00 = disabled
        01 = command recovery in 1 LCLK
        10 = command recovery in 0 LCLK
        11 = reserved
 3-2    primary IDE drive 1 enhanced mode
        00 = disabled
        01 = command recovery in 1 LCLK
        10 = command recovery in 0 LCLK
        11 = reserved
 1-0    primary IDE drive 0 enhanced mode
        00 = disabled
        01 = command recovery in 1 LCLK
        10 = command recovery in 0 LCLK
        11 = reserved
SeeAlso: #00960,#00963

Bitfields for OPTi 82C750 Vendetta (IDE Controller) ultra DMA mode select:
Bit(s)  Description     (Table 00964)
 15     primary IDE disable
 14-12  reserved
 11-10  secondary IDE drive 1 ultra DMA mode
        00 = mode 0
        01 = mode 1
        10 = mode 2
        11 = reserved
 9-8    secondary IDE drive 0 ultra DMA mode (same values as bits 11-10)
 7-6    primary IDE drive 1 ultra DMA mode (same values as bits 11-10)
 5-4    primary IDE drive 0 ultra DMA mode (same values as bits 11-10)
 3      secondary IDE drive 1 ultra DMA 33 enable
 2      secondary IDE drive 0 ultra DMA 33 enable
 1      primary IDE drive 1 ultra DMA 33 enable
 0      primary IDE drive 0 ultra DMA 33 enable
SeeAlso: #00960

Format of PCI Configuration data for OPTi 82C861/82C871 PCI-to-USB Bus Bridge:
Offset  Size    Description     (Table 00965)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 1045h, device ID C861h)
 40h  4 BYTEs   reserved for testing
 44h 10 BYTEs   reserved
 4Eh    BYTE    I2C control
                bits 7-5: reserved
                bit 4: I2C data output read-back (read-only)
                bit 3: I2C clock output read-back (read-only)
                bit 2: I2C data output
                bit 1: I2C clock output
                bit 0: I2C control enable
 4Fh    BYTE    reserved
 50h    BYTE    PCI host feature control
                bits 7-4: reserved
                bit 3: subsystem vendor ID register write disable
                bit 2: CLKRUN# enable
                bit 1: port 2 output disable
                bit 0: port 1 output disable
 51h    BYTE    interrupt assignment
                bit 7: host controller type 
                    0 = Viper-N+ (send 1 data phase on IRQ driveback)
                    1 = FireStar (send 2 data phases on IRQ driveback)
                bit 6: IRQ driveback enable
                bit 5: reserved
                bits 4-0: interrupt assignment
                    00000 = disabled
                    00001 = PCIRQ0# (default) to 00100 = PCIRQ3#,
                    00101 = ACPI0 to 01111 = ACPI10
                    10000 = IRQ0 to 11111 = IRQ15
 52h  2 BYTEs   reserved
 54h    DWORD   IRQ driveback address
                bits 1-0: reserved to 00 (read-only)
 58h 20 BYTEs   reserved
 6Ch    DWORD   reserved (test mode enable)
SeeAlso: #00878,#00929,#00939

Format of OPTi FireLink/FireBlast Host Controller memory-mapped registers:
Offset  Size    Description     (Table 00966)
 00h 256 BYTES  standard OpenHCI registers (see #00902)
100h    DWORD   "HceControl"    emulation control (see #00967)
104h    DWORD   "HceInput"      legacy Input Buffer (see #00968)
108h    DWORD   "HceOutput"     legacy Output Buffer (see #00969)
10Ch    DWORD   "HceStatus"     legacy Status (see #00970)
SeeAlso: #00902,#00965

Bitfields for OPTi FireLink/FireBlast "HceControl" register:
Bit(s)  Description     (Table 00967)
 31-9   reserved
 8      A20 gate state
 7      IRQ12 active (write 1 to clear)
 6      IRQ1 active (write 1 to clear)
 5      A20 gate sequence
        1  D1h written to port 64h
        0  other than D1h written to port 64h
 4      external IRQ emulation enable
 3      IRQ enable
 2      character pending emulation enable
 1      (read-only) emulation interrupt condition
 0      emulation enable
SeeAlso: #00902,PORT 0064h

Bitfields for OPTi FireLink/FireBlast "HceInput" register:
Bit(s)  Description     (Table 00968)
 31-8   reserved
 7-0    data written to port 60h or 64h
SeeAlso: #00902,#00970,PORT 0060h,PORT 0064h

Bitfields for OPTi FireLink/FireBlast "HceOutput" register:
Bit(s)  Description     (Table 00969)
 31-8   reserved
 7-0    data to be returned on read of port 60h
SeeAlso: #00902,PORT 0060h

Bitfields for OPTi FireLink/FireBlast "HceStatus" register:
Bit(s)  Description     (Table 00970)
 31-8   reserved
 7      parity error
 6      time-out
 5      aux output full enable
 4      keyboard inhibit switch state
        0  inhibited
        1  not inhibited
 3      data written to port:
        0  port 60h
        1  port 64h
 2      warm/cold boot flag
 1      input full
 0      output full
SeeAlso: #00902,PORT 0060h,PORT 0064h
--------X-1AB10ASF1066-----------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION DWORD (PicoPower devices)
        AX = B10Ah subfn 1066h
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh) (see #00878)
Return: CF clear if successful
            ECX = dword read
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B10Ah,AX=B10Ah/SF=8086h

Format of PicoPower Vesuvius V3-LS ISA Bridge configuration:
Offset  Size    Description     (Table 00971)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 1066h, device ID 0002h or 8002h)
 40h    WORD    distributed DMA control register (see #00972)
 42h    BYTE    distributed DMA status register (see #00973)
 44h    DWORD   slave DMAC CH0 base register (see #00974)
 48h    DWORD   slave DMAC CH1 base register (see #00974)
 4Ch    DWORD   slave DMAC CH2 base register (see #00974)
 50h    DWORD   slave DMAC CH3 base register (see #00974)
 54h    DWORD   slave DMAC CH5 base register (see #00974)
 58h    DWORD   slave DMAC CH6 base register (see #00974)
 5Ch    DWORD   slave DMAC CH7 base register (see #00974)
 90h    DWORD   PCI-to-ISA bridge configuration register (see #00975)
 94h    DWORD   ISA memory address positive decode (see #00976)
 98h    DWORD   I/O address positive decode (see #00977)
 9Ch    WORD    I/O configuration address register (see #00978)
 A0h    DWORD   programmable ISA I/O address decoder (see #00979)
 A4h  6 DWORD   programmable ISA range decoder registers 1-6 (see #00980)
 C0h 64 BYTEs   reserved
SeeAlso: #00773

Bitfields for PicoPower Vesuvius V3-LS distributed DMA control register:
Bit(s)  Description     (Table 00972)
 15-6   reserved
 5      (revision BB & later) secondary slave floppy disk distributed access
          enable (if bit 1 = 0)
 4      (revision BB & later) secondary slave hard disk distributed access
          enable (if bit 1 = 0)
 3      slave floppy drive port distributed access enable (if bit 1 = 0)
 2      slave hard drive port distributed access enable (if bit 1 = 0)
 1      distributed DMA mode
        0 = master
        1 = slave
 0      distributed DMA function enable
SeeAlso: #00971

Bitfields for PicoPower Vesuvius V3-LS distributed DMA status register:
Bit(s)  Description     (Table 00973)
 7-1    reserved
 0      DDMA status (write 1 to clear)
SeeAlso: #00971

Bitfields for PicoPower Vesuvius V3-LS slave DMAC CH0-7 base register:
Bit(s)  Description     (Table 00974)
 31-16  reserved (0)
 15-7   channel base address
 6-4    channel base address (hardwired to channel number)
 3      extended address (0)
 2-1    size (00 for channel 0-3, 01 for channel 5-7)
 0      channel enable
SeeAlso: #00971

Bitfields for PicoPower Vesuvius V3-LS PCI-to-ISA bridge configuration:
Bit(s)  Description     (Table 00975)
 31-15  reserved
 14     AD/SD/SA bus staggering enable
 13     ISA bridge PCI positive decode enable
 12     ISA bridge PCI subtractive decode disable
 11-10  reserved
 9      retry enable
 8      lock input enable
 7      SERR#/NMI status flag (write 1 to clear)
 6      PERR#/NMI status flag (write 1 to clear)
 5      SERR# triggers NMI enable
 4      PERR# triggers NMI enable
 3      reserved
 2-0    (revision BB and later) system configuration setting
SeeAlso: #00971

Bitfields for PicoPower Vesuvius V3-LS ISA memory address positive decode:
Bit(s)  Description     (Table 00976)
 31-9   reserved
 8      ISA memory A0000h-AFFFFh and FFA0000h-FFFAFFFFh decode enable
 7      ISA memory B0000h-BFFFFh and FFB0000h-FFFBFFFFh decode enable
 6      ISA memory C0000h-C7FFFh and FFC0000h-FFFC7FFFh decode enable
 5      ISA memory C8000h-CFFFFh and FFC8000h-FFFCFFFFh decode enable
 4      ISA memory D0000h-D7FFFh and FFD0000h-FFFD7FFFh decode enable
 3      ISA memory D8000h-DFFFFh and FFD8000h-FFFDFFFFh decode enable
 2      ISA memory E0000h-E7FFFh and FFE0000h-FFFE7FFFh decode enable
 1      ISA memory E8000h-EFFFFh and FFE8000h-FFFEFFFFh decode enable
 0      ISA memory F0000h-FFFFFh and FFF0000h-FFFFFFFFh decode enable
SeeAlso: #00971

Bitfields for PicoPower Vesuvius V3-LS I/O address positive decode:
Bit(s)  Description     (Table 00977)
 31-24  reserved
 23     (revision BB and later) I/O read 377h decode enable
 22     (revision BB and later) I/O read 3F7h decode enable
 21     PC NET (360h-36Fh) decode enable
 20     audio 5 (388h-38Bh) decode enable
 19     audio 4 (250h-25Fh) decode enable
 18     audio 3 (240h-24Fh) decode enable
 17     audio 2 (230h-23Fh) decode enable
 16     audio 1 (220h-22Fh) decode enable
 15     audio 0 (201h) decode enable
 14     (revision BB and later) ISA secondary floppy (370h-375h, 377h write)
          decode enable
 13     (revision BB and later) ISA primary floppy (3F0h-3F5h, 3F7h write)
          decode enable
 12     (revision BB and later) ISA secondary IDE (170h-177h, 376h) decode
          enable
 11     (revision BB and later) ISA primary IDE (1F0h-1F7h, 3F6h) decode enable
 10     ISA LPT3 (3BCh-3BFh, 7BCh-7BEh) decode enable
 9      ISA LPT2 (278h-27Fh, 678h-67Ah) decode enable
 8      ISA LPT1 (378h-37Fh, 778h-77Ah) decode enable
 7      ISA COM4 (2E8h-2EFh) decode enable
 6      ISA COM3 (3E8h-3EFh) decode enable
 5      ISA COM2 (2F8h-2FFh) decode enable
 4      ISA COM1 (3F8h-3FFh) decode enable
 3      ISA system I/O (00h-FFh) decode enable
 2      configuration (24h/26h) decode enable
 1-0    reserved
SeeAlso: #00971

Bitfields for PicoPower Vesuvius V3-LS I/O configuration address register:
Bit(s)  Description     (Table 00978)
 15-10  reserved
 9-1    configuration I/O address
 0      configuration address register enable
SeeAlso: #00971

Bitfields for PicoPower Vesuvius V3-LS programmable ISA I/O address decoder:
Bit(s)  Description     (Table 00979)
 31-18  reserved
 17     ISA range decoder 6 read enable
 16     ISA range decoder 6 write enable
 15     ISA range decoder 6 type
        0 = memory
        1 = I/O
 14     ISA range decoder 5 read enable
 13     ISA range decoder 5 write enable
 12     ISA range decoder 5 type (same values as bit 15)
 11     ISA range decoder 4 read enable
 10     ISA range decoder 4 write enable
 9      ISA range decoder 4 type (same values as bit 15)
 8      ISA range decoder 3 read enable
 7      ISA range decoder 3 write enable
 6      ISA range decoder 3 type (same values as bit 15)
 5      ISA range decoder 2 read enable
 4      ISA range decoder 2 write enable
 3      ISA range decoder 2 type (same values as bit 15)
 2      ISA range decoder 1 read enable
 1      ISA range decoder 1 write enable
 0      ISA range decoder 1 type (same values as bit 15)
SeeAlso: #00971

Bitfields for PicoPower Vesuvius V3-LS programmable ISA range decoder 1:
Bit(s)  Description     (Table 00980)
 31-16  ISA address compare
 15-0   ISA device address (memory address bits 23-8, I/O address bits 15-0)
SeeAlso: #00971
--------X-1AB10ASF1066-----------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION DWORD (Brooktree devices)
        AX = B10Ah subfn 1066h
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh) (see #00878)
Return: CF clear if successful
            ECX = dword read
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B10Ah,AX=B10Ah/SF=8086h

Format of Brooktree Bt8230 ATM controller configuration:
Offset  Size    Description     (Table 00981)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 109Eh, device ID 8230h)
 10h    DWORD   address at which to map external memory (multiple of 16M)
                internal registers are mapped at offsets 0000h-01FFh; Bt8222
                  registers are mapped at 0200h-03FFh, and T1/E1 Framer
                  registers are mapped at 0800h-0FFFh.  Only 32-bit memory
                  accesses are used
 40h    BYTE    maximum burst length (00h not allowed, default = 10h)
 41h    BYTE    "SPECIAL_STATUS"
                bit 3: attempted to perform DMA on PCI while bus-mastering
                          disabled in PCI command word
                bit 2: PCI/DMA synchronization error occurred
                bit 1: PCI bus master encountered fatal error
                bit 0: direction of transaction which encountered error
                        =0 write (refer to offset 48h)
                        =1 read (refer to offset 44h)
                Note:   bits 3-1 are write-clear, bit 0 is read-only
 42h  2 BYTEs   unused
 44h    DWORD   current read target address for PCI bus master (read-only)
 48h    DWORD   current write target address for PCI bus master (read-only)
 4Ch 180 BYTEs  reserved
SeeAlso: #00790
--------X-1AB10ASF1106-----------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION DWORD (VIA Technologies devices)
        AX = B10Ah subfn 1106h
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh) (see #00878)
Return: CF clear if successful
            ECX = dword read
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B10Ah,AX=B10Ah/SF=8086h


Format of Via Technologies' VT82C580VPX CPU-PCI bridge configuration:
Offset  Size    Description     (Table 00982)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 1106h, device ID 0585h)
 40h 16 BYTEs   unused
 50h    BYTE    cache control 1
 51h    BYTE    cache control 2
 52h    BYTE    non-cacheable control
 53h    BYTE    system performance control
 54h    BYTE    non-cacheable region 1 (high)
 55h    BYTE    non-cacheable region 1 (low)
 56h    BYTE    non-cacheable region 2 (high)
 57h    BYTE    non-cacheable region 2 (low)
 58h    BYTE    DRAM configuration 1
 59h    BYTE    DRAM configuration 2
 5Ah  6 BYTEs   DRAM row N ending address (N=0-5)
 60h    BYTE    DRAM type
 61h    BYTE    shadow RAM control 1
 62h    BYTE    shadow RAM control 2
 63h    BYTE    shadow RAM control 3
 64h    BYTE    DRAM reference timing
 65h    BYTE    DRAM timing control 1 (see #00996)
 66h    BYTE    DRAM timing control 2 (see #00997)
 67h    BYTE    32-bit DRAM width (see #00998)
 68h    BYTE
 69h    BYTE    reserved ("do not program")
 6Ah    BYTE    refresh counter
 6Bh    BYTE    refresh control
 6Ch    BYTE    SDRAM control
 6Dh    BYTE    DRAM control drive strength
 6Eh  2 BYTEs   reserved
 70h    BYTE    PCI buffer control
 71h    BYTE    CPU-to-PCI flow control 1
 72h    BYTE    CPU-to-PCI flow control 2
 73h    BYTE    PCI master control 1
 74h    BYTE    PCI master control 2
 75h    BYTE    PCI arbitration 1
 76h    BYTE    PCI arbitration 2
 77h    BYTE    reserved for chip test
 78h 136 BYTEs  reserved
!!!via\580vpx.pdf
SeeAlso: #00817

Format of AMD-640 System Controller:
Offset  Size    Description     (Table 00983)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 1106h, device ID 0595h)
 0Dh    BYTE    latency timer (bits 7-3)
                00h = 32*8 PCI clocks
                01h = 1*8 PCI clocks
                N = N*8 PCI clocks
 40h 16 BYTEs   unused???
 50h    BYTE    cache control 1 (see #00984)
 51h    BYTE    cache control 2 (see #00985)
 52h    BYTE    non-cacheable control (see #00986)
 53h    BYTE    system performance control (see #00987)
 54h    WORD    non-cacheable region 1 (see #00988)
 56h    WORD    non-cacheable region 2 (see #00988)
 58h    BYTE    DRAM configuration register 1 (see #00989)
 59h    BYTE    DRAM configuration register 2 (see #00990)
 5Ah  6 BYTEs   end of DRAM banks 0-5
                each register specifies bits 29-22 of the bank's ending address
 60h    BYTE    DRAM type (see #00991)
 61h    BYTE    shadow RAM control register 1 (see #00992)
 62h    BYTE    shadow RAM control register 2 (see #00993)
 63h    BYTE    shadow RAM control register 3 (see #00994)
 64h    BYTE    DRAM timing (see #00995)
 65h    BYTE    DRAM control register 1 (see #00996)
 66h    BYTE    DRAM control register 2 (see #00997)
 67h    BYTE    32-bit DRAM width control register (see #00998)
 68h  2 BYTEs   reserved
 6Ah    BYTE    DRAM refresh counter (in units of 16 CPU clocks)
 6Bh    BYTE    DRAM refresh control register (see #00999)
 6Ch    BYTE    SDRAM control register (see #01000)
 6Dh    BYTE    DRAM drive strength control register (see #01001)
 6Eh    BYTE    ECC control register (see #01002)
 6Fh    BYTE    ECC status register (see #01003)
 70h    BYTE    PCI buffer control (see #01004)
 71h    BYTE    CPU-to-PCI flow control 1 (see #01005)
 72h    BYTE    CPU-to-PCI flow control 2 (see #01006)
 73h    BYTE    PCI target control (see #01007)
 74h    BYTE    PCI initiator control (see #01008)
 75h    BYTE    PCI arbitration control 1 (see #01009)
 76h    BYTE    PCI arbitration control 2 (see #01010)
 77h 137 BYTEs  reserved
Note:   the AMD-640 uses PCI configuration mechanism #1; bus/device/function
          are always 00h/00h/00h
SeeAlso: #00817,#01011

Bitfields for AMD-640 Cache Control Register 1:
Bit(s)  Description     (Table 00984)
 7-6    cache enable
        00 disabled
        01 initialization (BIOS fills L2 cache to known state)
        10 enabled (normal operation)
        11 reserved
 5      reserved (do not change)
 4-3    tag configuration
        00 eight tag bits, no "modify" bit
        01 seven tag bits, one modify bit
        10 ten tag bits, no modify bit
        11 nine tag bits, one modify bit
 2      reserved (0)
 1-0    type of cache RAM
        00 none
        01 reserved
        10 burst SRAM
        11 pipeline burst SRAM
SeeAlso: #00983,#00985

Bitfields for AMD-640 Cache Control Register 2:
Bit(s)  Description     (Table 00985)
 7-6    reserved (0)
 5      backoff processor until L2 cache filled
 4      reserved (0)
 3      two banks of SRAM instead of one
 2      reserved (0)
 1-0    L2 cache size
        00 = 256K
        01 = 512K
        10 = 1M
        11 = 2M
SeeAlso: #00983,#00984,#00986

Bitfields for AMD-640 Non-Cacheable Control Register:
Bit(s)  Description     (Table 00986)
 7      segment C000h-C7FFh cacheable and write-protected
 6      D000h-DFFFh cacheable and write-protected
 5      E000h-EFFFh cacheable and write-protected
 4      F000h-FFFFh cacheable and write-protected
 3      reserved (0)
 2      force L2 cache fill
 1      reserved (1)
 0      L2 write mode (0 = writeback, 1 = write-through)
SeeAlso: #00983,#00985,#00987

Bitfields for AMD-640 System Performance Control Register:
Bit(s)  Description     (Table 00987)
 7      enable read-around-write
 6      enable cache read pipeline cycle
 5      enable cache write pipeline cycle
 4      enable DRAM pipeline cycle
 3      enable PCI Peer Concurrence (PCI initiator can transfer to another
          PCI device without blocking memory or CPU bus)
 2-0    reserved (0)
SeeAlso: #00983,#00986

Bitfields for AMD-640 Non-Cacheable Region register:
Bit(s)  Description     (Table 00988)
 15-11  bits 20-16 of region's base address
 10-8   size of non-cacheable area
        000 disabled
        001 = 64K
        010 = 128K
        ...
        110 = 2M
        111 = 4M
 7-0    bits 28-21 of region's base address
SeeAlso: #00983,#00989

Bitfields for AMD-640 DRAM Configuration Register 1:
Bit(s)  Description     (Table 00989)
 7-5    type of address mapping for memory banks 0 and 1
        ---EDO/FastPageMode---
        000 eight-bit column address
        001 nine-bit column address
        010 ten-bit column address
        011 eleven-bit column address
        100 twelve-bit column address
        other reserved
        ---SDRAM---
        0xx = 16-Mbit SDRAM (see #00991)
        1xx = 64-Mbit SDRAM
 4      reserved (0)
 3-1    type of address mapping ofr memory banks 2 and 3
 0      reserved (0)
SeeAlso: #00983,#00990

Bitfields for AMD-640 DRAM Configuration Register 2:
Bit(s)  Description     (Table 00990)
 7-5    type of address mapping for memory banks 4 and 5 (see #00989)
 4-3    reserved (0)
 2-0    last populated memory bank
        000 - 101 = Bank0 - Bank5
        110,111 reserved
Note:   banks 2-4 are non-cacheable if tag RAM is ten bits + modified bit
SeeAlso: #00983,#00989

Bitfields for AMD-640 DRAM Type register:
Bit(s)  Description     (Table 00991)
 7-6    reserved
 5-4    type of DRAM in banks 4 and 5
        00 fast page mode (FPM)
        01 extended data out (EDO)
        10 reserved
        11 synchronous DRAM (SDRAM)
 3-2    type of DRAM in banks 2 and 3
 1-0    type of DRAM in banks 0 and 1
SeeAlso: #00983,#00989,#00990

Bitfields for AMD-640 Shadow RAM Control Register 1:
Bit(s)  Description     (Table 00992)
 7-6    segment CC00h-CFFFh shadow RAM control
        00 shadowing disabled
        01 write enabled
        10 read enabled
        11 both read and write enabled
 5-4    segment C800h-CBFFh shadow RAM control
 3-2    segment C400h-C7FFh shadow RAM control
 1-0    segment C000h-C3FFh shadow RAM control
SeeAlso: #00983,#00993,#00994

Bitfields for AMD-640 Shadow RAM Control Register 2:
Bit(s)  Description     (Table 00993)
 7-6    segment DC00h-DFFFh shadow RAM control
        00 shadowing disabled
        01 write enabled
        10 read enabled
        11 both read and write enabled
 5-4    segment D800h-DBFFh shadow RAM control
 3-2    segment D400h-D7FFh shadow RAM control
 1-0    segment D000h-D3FFh shadow RAM control
SeeAlso: #00983,#00992,#00994

Bitfields for AMD-640 Shadow RAM Control Register 3:
Bit(s)  Description     (Table 00994)
 7-6    segment E000h-EFFFh shadow RAM control
        00 shadowing disabled
        01 write enabled
        10 read enabled
        11 both read and write enabled
 5-4    segment F000h-FFFFh shadow RAM control
 3-2    ISA memory hole
        00 none
        01 = 512K-640K
        10 = 15M-16M
        11 = 14M-16M
 1      enable SMI redirection
        if set: 30000h-3FFFFh redirected to B0000h, 40000h-4FFFFh to A0000h
 0      redirect video RAM accesses (A0000h-BFFFFh) to system DRAM rather than
          PCI bus (used to initialize SMRAM at B0000h)
SeeAlso: #00983,#00992,#00993

Bitfields for AMD-640 DRAM Timing register:
Bit(s)  Description     (Table 00995)
 7-6    RAS# precharge time
        00 = 2T (for 50ns DRAM) [T = HCLK period]
        01 = 3T (60ns)
        10 = 4T (70ns)
        11 = 6T
 5-4    RAS# pulse width
        00 = 3T (for 50ns DRAM)
        01 = 4T (60ns)
        10 = 5T (70ns)
        11 = 6T
 3-2    CAS# pulse width
        FPM: 00=1T, 01=2T, 10=3T, 11=4T
        EDO: 00=4T, 01=1T, 10=2T, 11=3T
 1      write pulse width (0 = 1T, 1 = 2T)
 0      delay from column address to CAS# (0 = 1T, 1 = 2T)
SeeAlso: #00983,#00994

Bitfields for AMD-640 DRAM Control Register 1:
Bit(s)  Description     (Table 00996)
 7-6    page mode control
        00 close page after access
        01 reserved
        10 keep page open until timeout or page miss
        11 close page if processor has not accessed DRAM for 8 CPU cycles
 5      enable fast DRAM decoding
 4      reduce EDO DRAM leadoff cycle from 6T to 5T
 3      delay DRAM data latch by 1/2 clock
 2      (AMD-640) reserved
        (VT82C580VPX) Pin88 function (0 = DB32, 1 = TA9)
 1      reserved (0)
 0      delay DRAM read cycle by 1T whenever write buffer contains data
        must be set if read-around-write is enabled (see #00987)
SeeAlso: #00983,#00997,#00982

Bitfields for AMD-640 DRAM Control Register 2:
Bit(s)  Description     (Table 00997)
 7      enable EDO test mode
        when set, EDO RAM contents will read correctly, FPM not
 6      reserved (0)
 5-3    (AMD-640) reserved (0)
 5      (VT82C580VPX) SDRAM CAS# latency (0 = latency 2, 1 = latency 3)
 4      (VT82C580VPX) reserved (0)
 3      (VT82C580VPX) enable Turbo EDO mode (0 = x-2-2-2, 1 = x-1-1-1 bursts)
 2      add one wait state for memory data-to-host data pop
 1      reduce RAS# precharge by 1T for SDRAM
 0      reduce RAS# to CAS# delay for SDRAM
Note:   bits 1 and 0 have no effect unless SDRAM has been selected via the
          DRAM type register (see #00991)
SeeAlso: #00983,#00996,#00982

Bitfields for AMD-640 32-bit DRAM Width Control register:
Bit(s)  Description     (Table 00998)
 7      RAS# to Column Address delay (0 = 1T, 1 = 2T)
 6      delay NA# by 1T
 5-0    widths of banks 5 - 0
        AMD-640 documentation clains that all bits should be cleared
        for VT82C580VPX, settings are 0 = 64-bit, 1 = 32-bit (only applicable
          when two banks of PBSRAM are installed)
SeeAlso: #00983,#00982,#00997,#00999

Bitfields for AMD-640 DRAM Refresh Control register:
Bit(s)  Description     (Table 00999)
 7      enable CAS#-before-RAS# refresh
 6      enable burst refresh (four rows every 60 us, not one every 15 us)
 5-0    reserved (0)
SeeAlso: #00983,#00998

Bitfields for AMD-640 SDRAM Control Register:
Bit(s)  Description     (Table 01000)
 7      enable 4-bank interleave for 64-Mbit SDRAMs (when bit 5 set)
 6      enable SDRAM burst write
 5      enable SDRAM bank interleave
        (when set, reduces 3-line burst from 8-1-1-1-3-1-1-1-3-1-1-1 to 8-1...)
 4      reserved (0)
 3      SDRAM CAS# latency (0 = latency 2, 1 = latency 3)
 2-0    SDRAM Operation Mode
        000 normal SDRAM
        001 enable NOP command
        010 convert CPU-to-DRAM cycles into All Banks Precharge command
        011 convert CPU-to-DRAM cycles into commands on MA[11:0]
        100 enable CAS#-before-RAS# cycles
        other reserved
SeeAlso: #00983,#00999

Bitfields for AMD-640 DRAM Drive Strength Control register:
Bit(s)  Description     (Table 01001)
 7      bank decoding test (1="for production test only. DO NOT SET.")
 6      strength of MA[1:0] drive (0 = 12ma, 1 = 24ma)
 5      function of N17 and M17 pins
        0 N17 is RAS5#, M17 is RAS4#
        1 N17 is MA1, M17 is MA0
 4      force SMM mode (when set, act as if SMIACT# is asserted)
 3      strength of SDRAM command lines (0 = 12ma, 1 = 24ma)
 2      strength of MA[13:2] and WEx# drive (0 = 12ma, 1 = 24ma)
 1      strength of CAS# drive (0 = 12ma, 1 = 24ma)
 0      strength of RAS# drive (0 = 12ma, 1 = 24ma)
SeeAlso: #00983,#00999

Bitfields for AMD-640 ECC Control Register:
Bit(s)  Description     (Table 01002)
 7      ECC mode select (0 = parity, 1 = ECC)
 6      reserved (0)
 5      assert SERR# for ECC multibit errors
 4      assert SERR# for ECC single-bit errors
 3      add 1T for SDRAM read cycles with ECC (required when ECC mode enabled)
 2      enable ECC for banks 5 and 4
 1      enable ECC for banks 3 and 2
 0      enable ECC for banks 1 and 0
SeeAlso: #00983,#01003

Bitfields for AMD-640 ECC Status Register:
Bit(s)  Description     (Table 01003)
 7      multi-bit error detected (write-clear)
 6-4    number of DRAM bank containing multi-bit error (write-clear)
 3      single-bit error detected (write-clear)
 2-0    number of DRAM bank containing single-bit error (write-clear)
SeeAlso: #00983,#01002

Bitfields for AMD-640 PCI Buffer Control register:
Bit(s)  Description     (Table 01004)
 7      enable CPU-to-PCI posted writes
 6      enable PCI-to-DRAM posted writes
 5      enable PCI-to-DRAM prefetch
 4-2    reserved (0)
 1      disable PCI retry for processor QuadWord access
 0      CPU-to-PCI buffer flushing
        0 flushing has priority over bus grants
        1 bus-grant to another PCI initiator has priority over flushing
SeeAlso: #00983

Bitfields for AMD-640 CPU-to-PCI Flow Control 1 register:
Bit(s)  Description     (Table 01005)
 7,3    PCI burst control
        00 no bursts, every write goes to write buffer
        01 burst writes placed in write buffer, non-burst writes sent to PCI
              bus immediately after write buffers flushed
        1x all writes go to write buffer; bursting performed for burstable
              transactions
 6      enable byte merge
 5      reserved (1)
 4      enable posted PCI I/O cycle writes
 2      eanble fast back-to-back PCI writes
 1      enable quick frame generation (FRAME# asserted one clock early)
 0      add one wait state to IRDY#
SeeAlso: #00983,#01006

Bitfields for AMD-640 CPU-to-PCI Flow Control 2 register:
Bit(s)  Description     (Table 01006)
 7      unsuccessful retry (16 or 64 times) has occurred (write-clear)
 6      retry timeout action
        0 retry continuously, recording status
        1 flush buffer; if reading, return FFFFFFFFh
 5-4    retry count and backoff
        00 retry twice, backoff processor
        01 retry 16 times, set bit 7 on failure
        10 retry four times, backoff processor
        11 retry 64 times, set bit 7 on failure
 3      discard failed data from write buffer when retry fails
 2      backoff processor if PCI read retry fails
 1      assert FRAME# one cycle earlier than indicated by offset 71h bit 1
 0      reduce TRDY#-to-BRDY# by one HCLK on processor reads of PCI target
SeeAlso: #00983,#01005,#01007

Bitfields for AMD-640 PCI Target Control register:
Bit(s)  Description     (Table 01007)
 7      slow memory decoding (must be set if fast back-to-back cycles enabled)
 6      add one wait state to TRDY# response on reads
 5      add one wait state to TRDY# response on writes
 4      reserved (0)
 3      assert STOP# after write timeout
 2      assert STOP# after read timeout
 1      enable sampling of PCI LOCK# pin
 0      force AMD-640 to initiate PCI arbitration if FRAM# not asserted within
          16 PCI clocks of last GNT#
SeeAlso: #00983,#01006,#01008

Bitfields for AMD-640 PCI Initiator Control register:
Bit(s)  Description     (Table 01008)
 7      enable enhanced PCI commands (Memory Read Line, Memory Read Multiple,
          and Memory Write and Invalidate)
 6      enable single-write byte merging
 5-0    reserved (0)
SeeAlso: #00983,#01007,#01008

Bitfields for AMD-640 PCI Arbitration Control 1 register:
Bit(s)  Description     (Table 01009)
 7      arbitration priority
        0 = fixed (high-to-low is REQ1#, REQ2#, REQ3#, REQ4#, PREQ#, and CPU)
        1 = fair (round-robin) arbitration
 6      arbitration mode
        0 arbitrate at end of REQ#
        1 arbitrate at end of each FRAME# (allows pre-emption by a
          higher-priority initiator)
 5-4    reserved (0)
 3-0    number of idle time periods of 32 PCI clocks before arbitration is
          forced (0000 disables timeout)
SeeAlso: #00983,#01008,#01010

Bitfields for AMD-640 PCI Arbitration Control 2 register:
Bit(s)  Description     (Table 01010)
 7      enable initiator priority rotation
        =0 use arbitration priority as set by offset 75h bit 7 (see #01009)
 6      reserved (0)
 5-4    initiator priority rotation control
        00 disabled (use offset 75h bit 7 setting)
        01 grant to processor after every PCI initiator grant
        10 grant to processor after every other PCI initiator grant
        11 grant to processor after every three PCI initiator grants
 3-0    reserved (0)
SeeAlso: #00983,#01009

Format of AMD-645 Peripheral Bus Controller, function 0 (PCI-ISA bridge) data:
Offset  Size    Description     (Table 01011)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 1106h, device ID 0586h)
 40h    BYTE    ISA bus control (see #01012)
 41h    BYTE    ISA Test Mode (see #01013)
 42h    BYTE    ISA clock control (see #01014)
 43h    BYTE    ROM Decode Control (see #01015)
 44h    BYTE    keyboard controller control (see #01016)
 45h    BYTE    Type F DMA control (see #01017)
 46h    BYTE    Miscellaneous control 1 (see #01018)
 47h    BYTE    Miscellaneous control 2 (see #01019)
 48h    BYTE    Miscellaneous control 3 (see #01020)
 49h    BYTE    reserved
 4Ah    BYTE    IDE interrupt routing (see #01021)
 4Bh    BYTE    reserved
 4Ch    BYTE    PCI memory hole bottom, bits 23-16
 4Dh    BYTE    PCI memory hole top, bits 23-16
                (if top is <= bottom, hole is disabled)
 4Eh    WORD    DMA/Master memory access control 3 (see #01022)
 50h    BYTE    PnP DRQ Routing (see #01023)
 51h  3 BYTEs   reserved
 54h    BYTE    PCI IRQ Edge/Level selection (see #01024)
 55h    BYTE    PnP Routing for external MIRQ0/1 (see #01025)
 56h    BYTE    PnP Routing for PCI INTB/INTA (see #01027)
 57h    BYTE    PnP Routing for PCI INTD/INTC (see #01028)
 58h    BYTE    PnP Routing for external MIRQ2 (see #01029)
 59h    BYTE    MIRQ pin configuration (see #01030)
 5Ah    BYTE    XD Power-On Strap Options (see #01031)
 5Bh    BYTE    internal RTC test mode (see #01032)
 5Ch  4 BYTEs   reserved
 60h    WORD    distributed DMA, channel 0 base address/enable (see #01033)
 62h    WORD    distributed DMA, channel 1 base address/enable (see #01033)
 64h    WORD    distributed DMA, channel 2 base address/enable (see #01033)
 66h    WORD    distributed DMA, channel 3 base address/enable (see #01033)
 68h    WORD    reserved
 6Ah    WORD    distributed DMA, channel 5 base address/enable (see #01033)
 6Ch    WORD    distributed DMA, channel 6 base address/enable (see #01033)
 6Eh    WORD    distributed DMA, channel 7 base address/enable (see #01033)
 70h 144 BYTEs  reserved
SeeAlso: #00817,#00983,#01034,#01046

Bitfields for AMD-645 ISA Bus Control register:
Bit(s)  Description     (Table 01012)
 7      extra delay on ISA commands (default is disabled)
 6      enable extended ISA bus ready (default is disabled)
 5      ISA slave wait states (0=4 wait states [default], 1=5 wait states)
 4      chipset I/O wait states (0=2 wait states [default], 1=4 wait states)
 3      I/O recovery time enabled
 2      enable extended ALE
 1      no ROM wait states (default is clear, 1 wait state)
 0      enable ROM writes
SeeAlso: #01011

Bitfields for AMD-645 ISA Test Mode register:
Bit(s)  Description     (Table 01013)
 7-6    reserved (0)
 5      enable fast reset via PORT 0092h
 4      reserved (0)
 3      double DMA clock (=0 DMA at 1/2 ISA clock, =1 DMA at full ISA clock)
 2-0    reserved (0)
SeeAlso: #01011,#01012,#01014

Bitfields for AMD-645 ISA Clock Control register:
Bit(s)  Description     (Table 01014)
 7      disable "Latch IO16#"
 6-4    reserved (0)
 3      enable ISA Bus clock select via bits 2-0 (=0 use PCLK/4)
 2-0    ISA Bus clock select
        000 PCLK/3 (default)
        001 PCLK/2
        010 PCLK/4
        011 PCLK/6
        100 PCLK/5
        101 PCLK/10
        110 PCLK/12
        111 OSC/2
Note:   in order to safely change the ISA clock, bit 3 must first be cleared,
          then bits 2-0 may be changed, and finally bit 3 can be set again
SeeAlso: #01011,#01013

Bitfields for AMD-645 ROM Decode Control register:
Bit(s)  Description     (Table 01015)
 7      enable 64K ROM at FFFE00000h-FFFEFFFFh
 6      enable 384K ROM at FFF80000h-FFFDFFFFh
 5      enable 32K ROM at E8000h-EFFFFh
 4      enable 32K ROM at E0000h-E7FFFh
 3      enable 32K ROM at D8000h-D8FFFh
 2      enable 32K ROM at D0000h-D7FFFh
 1      enable 32K ROM at C8000h-CFFFFh
 0      enable 32K ROM at C0000h-C7FFFh
SeeAlso: #01011

Bitfields for AMD-645 Keyboard Controller Control register:
Bit(s)  Description     (Table 01016)
 7-4    reserved (0)
 3      enable Mouse Lock
 2-0    reserved (0)
SeeAlso: #01011

Bitfields for AMD-645 Type-F DMA Control register:
Bit(s)  Description     (Table 01017)
 7      enable line buffer from ISA Master/DMA to PCI
 6-4    enable Type F timing on DMA Channels 7, 6, 5
 3-0    enable Type F timing on DMA Channels 3-0
SeeAlso: #01011

Bitfields for AMD-645 Miscellaneous Control 1 register:
Bit(s)  Description     (Table 01018)
 7-5    reserved (0)
 4      enable command register test mode
        (when set, PCI offset 04h bits 0-1 become writable and bit 3 read-only)
 3-2    reserved (0)
 1      disallow interruptions of PCI burst reads
 0      enable posted memory writes
SeeAlso: #01011,#01019,#01020

Bitfields for AMD-645 Miscellaneous Control 2 register:
Bit(s)  Description     (Table 01019)
 7      use INIT as CPU reset signal instead of CPURST
 6      enable PCI transaction delay
 5      enable ports 04D0h-04D1h (per EISA spec)
 4      enable interrupt controller shadow register
 3      reserved (0)
 2      enable write delay transaction time-out timer
 1      enable read delay transaction time-out timer
 0      software PCI reset -- set to cause a PCI reset via PCIRST pin
SeeAlso: #01011,#01018,#01020,PORT 04D0h

Bitfields for AMD-645 Miscellaneous Control 3 register:
Bit(s)  Description     (Table 01020)
 7-4    reserved (0)
 3      disable RTC PORT 0074h and PORT 0075h
 2      disable integrated USB controller
 1      disable integrated IDE controller
 0      add 512K to offset 4Eh bits 15-12 at top of PCI memory
SeeAlso: #01011,#01018,#01019,PORT 0074h"AMD-645"

Bitfields for AMD-645 IDE Interrupt Routing register:
Bit(s)  Description     (Table 01021)
 7      wait for PGNT before Grant to ISA Master/DMA
 6      port 00xxh bus select (0=access via SD bus, 1=access via XD bus)
 5-4    reserved (0)
 3-2    secondary IDE channel IRQ (same encoding as primary)
 1-0    primary IDE channel IRQ
        00 IRQ14 (default for primary)
        01 IRQ15 (default for secondary)
        10 IRQ10
        11 IRQ11
SeeAlso: #01011

Bitfields for AMD-645 DMA/Master Memory Access Control 3 register:
Bit(s)  Description     (Table 01022)
 15-12  top of PCI memory for ISA DMA/Master access, bits 23-20, less 1
 11     accesses to E0000h-EFFFFh forwarded to PCI
 10     accesses to A0000h-BFFFFh forwarded to PCI
 9      accesses to 80000h-9FFFFh forwarded to PCI
 8      accesses to 00000h-7FFFFh forwarded to PCI
 7      accesses to DC000h-DFFFFh forwarded to PCI
 6      accesses to D8000h-DBFFFh forwarded to PCI
 5      accesses to D4000h-D7FFFh forwarded to PCI
 4      accesses to D0000h-D3FFFh forwarded to PCI
 3      accesses to CC000h-CFFFFh forwarded to PCI
 2      accesses to C8000h-CBFFFh forwarded to PCI
 1      accesses to C4000h-C7FFFh forwarded to PCI
 0      accesses to C0000h-C3FFFh forwarded to PCI
SeeAlso: #01011

Bitfields for AMD-645 PnP DRQ Routing register:
Bit(s)  Description     (Table 01023)
 7-0    reserved (always read 04h)
SeeAlso: #01011,#01024

Bitfields for AMD-645 PCI IRQ Edge/Level Select register:
Bit(s)  Description     (Table 01024)
 7-4    reserved
 3      PIRQA# is edge-sensitive rather than level-sensitive
 2      PIRQB# is edge-sensitive
 1      PIRQC# is edge-sensitive
 0      PIRQD# is edge-sensitive
SeeAlso: #01011,#01023,#01025

Bitfields for AMD-645 PnP IRQ Routing 1 register:
Bit(s)  Description     (Table 01025)
 7-4    routing for MIRQ1 (see #01026)
 3-0    routing for MIRQ0 (see #01026)
SeeAlso: #01011,#01024

(Table 01026)
Values for AMD-645 IRQ routing:
 0000   disabled
 0001   IRQ1
 0010   reserved
 0011   IRQ3
 ...
 0111   IRQ7
 1000   reserved
 1001   IRQ9
 ...
 1100   IRQ12
 1101   reserved
 1110   IRQ14
 1111   IRQ15
SeeAlso: #01025,#01027,#01028,#01029

Bitfields for AMD-645 PnP IRQ Routing 2 register:
Bit(s)  Description     (Table 01027)
 7-4    routing for PIRQB# (see #01026)
 3-0    routing for PIRQA# (see #01026)
SeeAlso: #01025,#01028,#01029

Bitfields for AMD-645 PnP IRQ Routing 3 register:
Bit(s)  Description     (Table 01028)
 7-4    routing for PIRQD# (see #01026)
 3-0    routing for PIRQC# (see #01026)
SeeAlso: #01025,#01027,#01029

Bitfields for AMD-645 PnP IRQ Routing 4 register:
Bit(s)  Description     (Table 01029)
 7-4    reserved
 3-0    routing for MIRQ2# (see #01026)
SeeAlso: #01025,#01027,#01028

Bitfields for AMD-645 MIRQ Pin Configuration register:
Bit(s)  Description     (Table 01030)
 7-3    reserved (0)
 2      select MASTER# instead of MIRQ2
 1      select KEYLOCK instead of MIRQ1
 0      select APICCS# instead of MIRQ0
SeeAlso: #01011,#01029

Bitfields for AMD-645 XD Power-Up Strap Options register:
Bit(s)  Description     (Table 01031)
 7-4    Keyboard RP16-RP13
 3      reserved (0)
 2      enable internal RTC
 1      enable internal PS/2 mouse
 0      enable internal keyboard controller
Note:   the default value of this register is latched from external pins at
          power-up
SeeAlso: #01011

Bitfields for AMD-645 Internal RTC Test Mode register:
Bit(s)  Description     (Table 01032)
 7-2    reserved (0)
 1      enable access to internal RTC's RAM when RTC is disabled
          (see PORT 0074h"AMD-645")
 0      reserved (0)
SeeAlso: #01011

Bitfields for AMD-645 Distributed DMA Base/Enable register:
Bit(s)  Description     (Table 01033)
 15-4   base address bits 15-4 for Channel N
 3      enable DMA channel
 2-0    reserved (0)
SeeAlso: #01011

Format of AMD-645 Peripheral Bus Controller, function 1 (IDE Control) data:
Offset  Size    Description     (Table 01034)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 1106h [VIA Technologies], device ID 0571h)
 09h    BYTE    programming interface
                bit 7: Master IDE capability
                bits 6-4: reserved (0)
                bit 3: secondary channel supports operating mode selection
                bit 2: use native PCI mode, not compatibility mode for sec. ch.
                bit 1: primary channel supports operating mode selection
                bit 0: use native PCI mode, not compatibility mode for pri. ch.
 10h    DWORD   primary data/command base address
 14h    DWORD   primary control/status base address
 18h    DWORD   secondary data/command base address
 1Ch    DWORD   secondary control/status base address
 20h    DWORD   bus master control base address (default 0000CC01h)
 40h    BYTE    chip enable (see #01035)
 41h    BYTE    IDE configuration (see #01036)
 42h    BYTE    reserved ("do not program")
 43h    BYTE    FIFO configuration (see #01037)
 44h    BYTE    miscellaneous control 1 (see #01038)
 45h    BYTE    miscellaneous control 2 (see #01039)
 46h    BYTE    miscellaneous control 3 (see #01040)
 47h    BYTE    unused???
 48h    DWORD   drive timing control (see #01041)
 4Ch    BYTE    address setup time (see #01042)
 4Dh    BYTE    reserved ("do not program")
 4Eh    BYTE    secondary non-01F0h port access timing (see #01043)
 4Fh    BYTE    primary non-01F0h port access timing (see #01043)
 50h    BYTE    UltraDMA/33 extended timing control, Sec. Drive 1 (see #01044)
 51h    BYTE    UltraDMA/33 extended timing control, Sec. Drive 0 (see #01044)
 52h    BYTE    UltraDMA/33 extended timing control, Pri. Drive 1 (see #01044)
 53h    BYTE    UltraDMA/33 extended timing control, Pri. Drive 0 (see #01044)
 54h  4 BYTEs   reserved
 58h    DWORD   "reserved"
                (appears to be an additional set of drive timing controls)
 5Ch  4 BYTEs   ???
 60h    WORD    primary sector size (see #01045)
 62h  6 BYTEs   reserved
 68h    WORD    secondary sector size (see #01045)
 6Ah 150 BYTEs  reserved
Note:   the AMD-645 IDE controller is compatible with the SFF 8038i v1.0 spec
SeeAlso: #00817,#01011,#01046

Bitfields for AMD-645 IDE Chip Enable register:
Bit(s)  Description     (Table 01035)
 7-2    reserved (00001)
 1      enable primary IDE channel
 0      enable secondary IDE channel
SeeAlso: #01034,#01036

Bitfields for AMD-645 IDE Configuration register :
Bit(s)  Description     (Table 01036)
 7      enable primary IDE read-prefetch buffer
 6      enable primary IDE post write buffer
 5      enable secondary IDE read-prefetch buffer
 4      enable secondary IDE post write buffer
 3-0    reserved (0110)
SeeAlso: #01034,#01035,3813

Bitfields for AMD-645 IDE FIFO Configuration register:
Bit(s)  Description     (Table 01037)
 7      reserved (0)
 6-5    FIFO configuration
        00      primary channel = 16, secondary channel = 0
        01/10   primary channel = 8, secondary channel = 8
        11      primary channel = 0, secondary channel = 16
 4      reserved (1)
 3-2    primary channel FIFO threshold
        00 = completely full
        01 = 3/4 full
        10 = 1/2 full
        11 = 1/4 full
 1-0    secondary channel FIFO threshold (same settings as bits 3-2)
SeeAlso: #01034,#01036

Bitfields for AMD-645 IDE Miscellaneous Control 1 register:
Bit(s)  Description     (Table 01038)
 7      reserved (0)
 6      number of wait states on Master Read Cycle IRDY#
 5      number of wait states on Master Write Cycle IRDY#
 4      enable 1/2 clock advance on FIFO output
 3      enable bus-master IDE status register read retry
 2-0    reserved (0)
SeeAlso: #01034,#01039,#01040

Bitfields for AMD-645 IDE Miscellaneous Control 2 register:
Bit(s)  Description     (Table 01039)
 7      reserved (0)
 6      swap interrupts between the two IDE channels
 5-0    reserved (0)
SeeAlso: #01034,#01038,#01040

Bitfields for AMD-645 IDE Miscellaneous Control 3 register:
Bit(s)  Description     (Table 01040)
 7      enable FIFO flush for read DMA on primary channel interrupt
 6      enable FIFO flush for read DMA on secondary channel interrupt
 5      enable FIFO flush for each sector on primary channel
 4      enable FIFO flush for each sector on secondary channel
 3-2    reserved
 1-0    maximum DRDY# pulse width
        00 unlimited
        01 64 PCI clocks
        10 128 PCI clocks
        11 192 PCI clocks
SeeAlso: #01034,#01038,#01039

Bitfields for AMD-645 IDE Drive Timing Control register:
Bit(s)  Description     (Table 01041)
 31-28  primary drive 0 active DIOR#/DIOW# pulse width
 27-24  primary drive 0 DIOR#/DIOW# recovery time (PCI clocks, less 1)
 23-20  primary drive 1 active pulse width (PCI clocks, less 1)
 19-16  primary drive 1 recovery time
 15-12  secondary drive 0 active pulse width
 11-8   secondary drive 0 recovery time
 7-4    secondary drive 1 active pulse width
 3-0    secondary drive 1 recover time (PCI clocks, less 1)
SeeAlso: #01034,#01042

Bitfields for AMD-645 IDE Address Setup Time register:
Bit(s)  Description     (Table 01042)
 7-6    primary drive 0 address setup time
        00 = 1T
        01 = 2T
        10 = 3T
        11 = 4T
 5-4    primary drive 1 address setup time (same values as above)
 3-2    secondary drive 0 address setup time
 1-0    secondary drive 1 address setup time
SeeAlso: #01034,#01041

Bitfields for AMD-645 Non-01F0h Port Access Timing register:
Bit(s)  Description     (Table 01043)
 7-4    width of DIOR#/DIOW# active pulse in PCI clocks (less 1)
 3-0    DIOR#/DIOW# recovery time in PCI clocks (less 1)
SeeAlso: #01011

Bitfields for AMD-645 UltraDMA/33 Extended Timing Control register:
Bit(s)  Description     (Table 01044)
 7      method for enabling UltraDMA mode on drive
        0 using "Set Feature" command
        1 using bit 6 of this register
 6      enable UltraDMA mode for drive
 5      UltraDMA transfer mode
        0 UltraDMA DMA mode
        1 UltraDMA PIO mode
 4-2    reserved (0)
 1-0    drive cycle time
        00 = 2T
        ...
        11 = 5T
SeeAlso: #01011

Bitfields for AMD-645 Sector Size register:
Bit(s)  Description     (Table 01045)
 15-12  reserved
 11-0   sector size in bytes (default 200h)
SeeAlso: #01011

Format of AMD-645 Peripheral Bus Controller, function 2 (USB Controller) data:
Offset  Size    Description     (Table 01046)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 1106h, device ID 3038h)
 20h    DWORD   base address of USB I/O ports (see PORT xxxxh"AMD-645 - USB"
 40h    BYTE    miscellaneous control 1 (see #01047)
 41h    BYTE    miscellaneous control 2 (see #01048)
 42h  2 BYTEs   reserved
 44h  3 BYTEs   reserved ("do not program")
 47h    BYTE    reserved
 48h 24 BYTEs   reserved
 60h    BYTE    USB release number (read-only, 10h)
 61h 95 BYTEs   reserved
 C0h    WORD    USB legacy support (read-only, 2000h)
 C2h 62 BYTEs   reserved
SeeAlso: #00817,#00983,#01011,#01034,#01049

Bitfields for AMD-645 USB Miscellaneous Control 1 register:
Bit(s)  Description     (Table 01047)
 7      PCI memory commands
        0 support memory-read-line, memory-read-multiple, and
          memory-write-and-invalidate
        1 memory read and memory write commands only
 6      do not disable port on EOF babble
 5      eanble PCI parity checking and PERR# generation
 4      reserved (0)
 3      USB data length
        0 allow TD length up to 1280 bytes
        1 limit to 1023
 2      enable USB power management
 1      DMA limited to 8-DW burst instead of 16-DW
 0      insert one PCI wait state
SeeAlso: #01046,#01048

Bitfields for AMD-645 USB Miscellaneous Control 2 register:
Bit(s)  Description     (Table 01048)
 7-3    reserved (0)
 2      only trap port 60h/64h bits when trap-enable bits are set
 1      do not pass A20GATE command sequence (from UHCI) through I/O port 64h
 0      reserved (0)
SeeAlso: #01046,#01047,PORT 0064h

Format of AMD-645 Peripheral Bus Controller, function 3 (Power Mgmt) data:
Offset  Size    Description     (Table 01049)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 1106h, device ID 3040h)
 20h    DWORD   base address for I/O ports (see PORT xxxxh"AMD-645")
 40h    BYTE    pin configuration (see #01050)
 41h    BYTE    general configuration (see #01051)
 42h    BYTE    SCI interrupt configuration (see #01052)
 43h    BYTE    reserved
 44h    WORD    primary interrupt channel
                bit 2 is reserved; setting any other bit N makes IRQN the
                  primary interrupt channel
 46h    WORD    secondary interrupt channel
                bit 2 is reserved; setting any other bit N makes IRQN the
                  secondary interrupt channel
 48h  8 BYTEs   unused???
 50h    DWORD   GP timer control (see #01053)
 54h 13 BYTEs   reserved
 61h    BYTE    programming interface read value (value to be returned by
                  configuration register 09h) (write-only)
 62h    BYTE    subclass read value (value to be returned by
                  configuration register 0Ah) (write-only)
 63h    BYTE    base class read value (value to be returned by configuration
                  register 0Bh) (write-only)
 64h 156 BYTEs  reserved
SeeAlso: #00817,#00983,#01011,#01034,#01046,#01049

Bitfields for AMD-645 PM Pin Configuration register:
Bit(s)  Description     (Table 01050)
 7      GPIO4 configuration (0 = Pin136 is GPO_WE, 1 = Pin136 is GPIO4)
 6      GPIO3 configuration (0 = Pin92 is GPI_RE#, 1 = Pin92 is GPIO3)
 5-0    reserved (0)
SeeAlso: #01049,#01051

Bitfields for AMD-645 PM General Configuration register:
Bit(s)  Description     (Table 01051)
 7      enable debounce of PWRBTN# input
 6      enable ACPI timer reset
 5-4    reserved ("do not program")
 3      select ACPI timer size (0 = 24 bits, 1 = 32 bits)
 2      enable PCI Frame Activation as Resume Event im power state C2
 1      clock-throttling cycle time
        0 = 32 usec clock, 512 usec cycle time (default)
        1 = 1 msec clock 16 msec cycle time
 0      reserved ("do not program")
SeeAlso: #01049,#01050,MEM xxxxh:xxx0h"ACPI"

Bitfields for AMD-645 PM SCI Interrupt Configuration register:
Bit(s)  Description     (Table 01052)
 7-4    reserved (0)
 3-0    interrupt assignment
        0000 disabled
        else IRQ number (except IRQ2 is reserved)
SeeAlso: #01049

Bitfields for AMD-645 PM GP Timer Control register:
Bit(s)  Description     (Table 01053)
 31-30  power-conservation mode timer
        00 = 1/16 sec
        01 = 1/8 sec
        10 = 1 sec
        11 = 1 minute
 29     (read) set when system is in power-conservation mode
 28     enable power-conservation mode
 27-26  secondary event timer
        00 = 2 msec
        01 = 64 msec
        10 = 1/2 sec
        11 = 0.25 msec after EOI
 25     secondary event occurred, secondary event timer is counting down
 24     enable secondary event timer
 23-16  GP1 Timer count (see bits 5-4)
 15-8   GP0 Timer count (see bits 1-0)
 7      start GP1 timer
 6      automatically reload GP1 timer after counting down to 0
 5-4    time base for GP1 timer
        00 disabled
        01 = 32 microseconds
        10 = 1 second
        11 = 1 minute
 3      start GP0 timer
 2      automatically reload GP0 timer after counting down to 0
 1-0    time base for GP0 timer
        00 disabled
        01 = 1/16 second
        10 = 1 second
        11 = 1 minute
SeeAlso: #01049
--------X-1AB10ASF8086-----------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION DWORD (Intel devices)
        AX = B10Ah subfn 8086h
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh) (see #00878)
Return: CF clear if successful
            ECX = dword read
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B10Ah,AX=B10Ah/SF=1106h,AX=B10Dh

Format of PCI Configuration data for Intel 82375 EISA Bridge:
Offset  Size    Description     (Table 01054)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 0482h)
                (revision numbers: 03h = 82375EB, 04h = 82375SB)
 40h    BYTE    PCI Control
!!!intel\29047704.pdf pg. 32
 41h    BYTE    PCI Arbiter Control
 42h    BYTE    PCI Arbiter Priority Control
 43h    BYTE    PCI Arbiter Priority Control Extension
 44h    BYTE    MEMCS# Control
 45h    BYTE    MEMCS# Bottom of Hole
 46h    BYTE    MEMCS# Top of Hole
 47h    BYTE    MEMCS# Top of Memory
 48h    WORD    EISA Address Decode Control 1
 4Ah  2 BYTEs   reserved
 4Ch    BYTE    ISA I/O Recovery Time Control
 4Dh  7 BYTEs   reserved
 54h    BYTE    MEMCS# Attribute Register #1
 55h    BYTE    MEMCS# Attribute Register #2
 56h    BYTE    MEMCS# Attribute Register #3
 57h    BYTE    reserved
 58h    BYTE    PCI Decode Control
 59h    BYTE    reserved
 5Ah    BYTE    EISA Address Decode Control 2
 5Bh    BYTE    reserved
 5Ch    BYTE    EISA-to-PCI Memory Region Attributes
 5Dh  3 BYTEs   reserved
 60h  4 DWORDs  EISA-to-PCI Memory Region Address registers 1-4
 70h  4 DWORDs  EISA-to-PCI I/O Region Address registers 1-4
 80h    WORD    BIOS Timer base address
 82h  2 BYTEs   reserved
 84h    BYTE    EISA Latency Timer Control Register
 85h  3 BYTEs   reserved
 88h    DWORD   PCEB Test Control Register ("DO NOT WRITE")
 8Ch 116 BYTEs  reserved
SeeAlso: #00878,#01055

Format of PCI Configuration data for Intel 82434LX/NX Cache/DRAM Controller:
Offset  Size    Description     (Table 01055)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 04A3h)
                (revision numbers: 01h/03h are 82434LX, 1xh are 82434NX)
                (command register only supports bits 8,6,2,1,0)
 40h 16 BYTEs   unused (hard-wired to 00h)
 44h    BYTE    ??? (AMI BIOS writes 00h)
 45h    BYTE    ??? (AMI BIOS writes 00h)
 50h    BYTE    Host CPU Selection (see #01056)
 51h    BYTE    deturbo frequency control register
                when deturbo mode is selected (see PORT 0CF9h), the chipset
                  places a hold on the memory bus for a fraction of the
                  time inversely proportional to the value in this register
                  by comparing it against a free-running 8-bit counter counting
                  at 1/8 the CPU clock speed
                  (i.e. C0h = 1/4, 80h = 1/2, 40h = 3/4, 20h = 7/8, etc.)
                  (only bits 7-6 writable, bits 5-0 hardwired to 0)
 52h    BYTE    Secondary Cache Control (see #01057)
 53h    BYTE    Host Read/Write Buffer Control (see #01058)
 54h    BYTE    PCI Read/Write Buffer Control
                bits 7-3: reserved
                bit 2: LBXs connected to TRDY#
                bit 1: enable PCI burst writes
                bit 0: enable PCI-to-memory posted writes
 55h  2 BYTEs   reserved
 57h    BYTE    DRAM Control (see #01059)
 58h    BYTE    DRAM Timing (see also #01117)
                bits 7-2: reserved
                bit 1: (NX only) RAS# Wait State
                bit 0: CAS# Wait State (one extra wait state before CAS#
                          within burst cycle)
 59h  7 BYTEs   Programmable Attribute Map registers 0-6 (see #01118)
 60h  8 BYTEs   DRAM Row Boundary registers 0-7
                (chip revisions numbered < 10h [LX] only support six rows of
                  DRAM)
                each register N indicates the amount of cumulative amount of
                  memory in SIMM banks 0-N, in multiples of 1M; offset 67h
                  (65h on 82434LX's) contains the total amount of memory
                  installed in the system; on the 82434NX, two additional
                  bits are concatenated to each row boundary from the DRAM Row
                  Boundary Extension registers to allow up to 1024M of memory
                  to be specified (though only 512M are supported)
 68h  4 BYTEs   (NX only) DRAM Row Boundary Extension registers
                each nybble is concatenated with the corresponding DRAM Row
                  Boundary register to form a 12-bit boundary value (of which
                  only the low 10 bits are actually used)
 6Ch    DWORD   reserved (hardwired to 00000000h)
 70h    BYTE    Error Command (see #01060)
 71h    BYTE    Error Status (see #01061)
 72h    BYTE    System Management RAM control (see also #01123)
                bits 7-6: reserved
                bit 5:  map SMM-mode memory (64K) into address space when bits
                        2-0 = 010 (default 3000h:0000h; can be changed by
                        first SMM event)
                bit 4: close SMRAM space (allows data accesses to be forwarded
                        to PCI bus while execuding SMM code)
                bit 3: lock SMRAM space (can't be cleared by software)
                bits 2-0: SMRAM memory address (010 = Axxxxh, 011 = Bxxxxh)
 73h  5 BYTEs   reserved
 78h    WORD    Memory Space Gap
                bit 15: enable ISA hole
                bits 14-12: size of ISA hole in MB (less 1); must be power of 2
                bits 11-8: reserved
                bits 7-4: bottom of ISA memory hole in MB
                          (must be multiple of gap size)
                bits 3-0: reserved
 7Ah  2 BYTEs   reserved
 7Ch    DWORD   Frame Buffer Range (see #01062)
 80h 128 BYTEs  reserved
Note:   the 82434NX is part of the Intel Neptune chipset
SeeAlso: #01064,#01083

Bitfields for Intel 82434LX/NX Host CPU Selection:
Bit(s)  Description     (Table 01056)
 7-5    host CPU type
        LX: hardwired to 100 (Pentium)
        NX: "reserved" (101 on RB's system)
 4-3    reserved
 2      enable L1 cache
 1-0    Host Operating Frequency (set according to external bus speed)
        00: reserved
        01: 50 MHz
        10: 60 MHz
        11: 66 MHz
        (LX: bit 1 reserved, only 60/66 MHz supported)
SeeAlso: #01055,#01057

Bitfields for Intel 82434LX/NX Secondary Cache Control:
Bit(s)  Description     (Table 01057)
 7-6    secondary cache size
        00 none
        01 reserved
        10 256K
        11 512K
 5      SRAM type
        0 standard SRAMs
        1 burst SRAMs
 4      secondary cache allocation
        0 cache only CPU reads of memory with CACHE# asserted
        1 cache all CPU reads of cacheable memory
 3      Cache Byte Control
        0 use single write enable and per-byte select lines
        1 use per-byte write enables on the cache
 2      (NX only) SRAM connectivity
        0 disable CCS[1:0]# / CCS1# functionality
        1 enable CCS[1:0]# functionality to de-select async SRAMs, placing them
          in a low-power standby mode
        1 enable CCS1# functionality for burst SRAMs, indicating the lack of an
          external address latch
 1      (LX only) Secondary Cache Write Policy
        0 write-through
        1 write-back (NX is always in write-back mode)
 0      Secondary Cache Enable
SeeAlso: #01055,#01058

Bitfields for Intel 82434LX/NX Host Read/Write Buffer Control:
Bit(s)  Description     (Table 01058)
 7-4    reserved
 3      enable read-around-write
 2      reserved
 1      enable CPU-to-PCI posted writes
 0      (LX only) enable CPU-to-memory posted writes
        (NX always posts memory writes)
SeeAlso: #01055,#01057

Bitfields for Intel 82434LX/NX DRAM Control:
Bit(s)  Description     (Table 01059)
 7-6    (NX only) DRAM burst timing
        00  X-4-4-4 read/write (default)
        01  X-4-4-4 read, X-3-3-3 write
        10  reserved
        11  X-3-3-3 read/write
 5      parity error mask
 4      0-Active RAS# mode
 3      SMRAM enable (must be set to enable reg 72h)
 2      Burst-of-Four Refresh
 1      Refresh Type
        =0 RAS#-only
        =1 CAS#-before-RAS#
 0      DRAM Refresh Enable
SeeAlso: #01055

Bitfields for Intel 82434LX/NX Error Command register:
Bit(s)  Description     (Table 01060)
 7      assert SERR# on receiving target abort
 6      assert SERR# on PCI data-write parity error
 5      (NX only) assert SERR# on PCI data-read parity error
 4      (NX only) assert SERR# on PCI address parity error
 3      (NX only) assert PERR# on data parity error
 2      enable L2 cache parity
 1      enable SERR# on DRAM/L2 cache data parity error
 0      assert PEN# on data reads; allow CPU to signal parity error via PCHK#
Notes:  PCI command register bit 6 is master enable for bit 3;
        PCI cmd bits 6 and 8 are the master enable for bits 7-4 and 1
        bits 1-0 = 10 is not permitted
SeeAlso: #01055,#01061

Bitfields for Intel 82434LX/NX Error Status register:
Bit(s)  Description     (Table 01061)
 7      reserved
 6      PCI-write detected parity error
 5      (NX only) PCI-read detected parity error
 4      (NX only) PCI address parity error detected
 3      main memory data parity error
 2      L2 cache data parity error
 1      reserved
 0      Shutdown cycle detected
Note:   clear status bits by writing a 'one' bit to each bit to be cleared
SeeAlso: #01060,#01055

Bitfields for Intel 82434LX/NX Frame Buffer Range register:
Bit(s)  Description     (Table 01062)
 31-20  buffer offset (in 1MB increments; must be multiple of buffer set set
          by bits 3-0)
 19-14  reserved
 13     enable byte merging
 12     128K VGA-range Attribute Enable
        when set, bits 13,9,7 also apply to VGA memory range (Axxxx-Bxxxx)
 11-10  reserved
 9      no lock requests
 8      reserved
 7      enable transparent bufer writes
 6-4    reserved
 3-0    buffer size in MB (less 1); must be power of 2
Note:   if bits 31-20=0, the frame buffer feature is disabled
SeeAlso: #01055

Format of PCI Configuration data for Intel 82424 Cache Controller:
Offset  Size    Description     (Table 01063)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 0483h)
 40h    BYTE    bus number
 41h    BYTE    subordinate bus number
 42h    BYTE    disconnect timer
 50h    BYTE    host CPU selection
 51h    BYTE    deturbo frequency control
                when deturbo mode is selected (see PORT 0CF9h), the chipset
                  places a hold on the memory bus for a fraction of the
                  time inversely proportional to the value in this register
                  (i.e. C0h = 1/4, 80h = 1/2, 40h = 3/4, 20h = 7/8, etc.)
 52h    BYTE    secondary cache control
 53h    BYTE    write buffer control
 54h    BYTE    PCI features control
 55h    BYTE    DRAM Operation Mode Select
 56h    BYTE    System Exception Handling
 57h    BYTE    SMM Control Register
 58h    BYTE    reserved
 59h  7 BYTEs   Programmable Attribute Map registers 0-6 (see also #01118)
 60h  4 BYTEs   DRAM Row Boundary registers 0-3
                each register N indicates amount of memory in rows 0-N (each
                  row is 64 bits wide)
                boundary register 3 (offset 63h) contains the total system
                  memory, which may not exceed 128M
 64h  4 BYTEs   unused???
 68h    WORD    Memory Hole-0
 6Ah    WORD    Memory Hole-1
Note:   the above field names are those given by EduWARE's PCI Configuration
          Manager v1.2
SeeAlso: #01055,#01083,#01108

Format of PCI Configuration data for Intel 82378 and 82379 ISA Bridges:
Offset  Size    Description     (Table 01064)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 0484h)
                (revision ID:
                    bits 7-4: reserved
                    bits 3-0: revision
                        0011 82378ZB A0-step
                        1000 82379AB A0-step)
 40h    BYTE    PCI Control (see #01065)
 41h    BYTE    PCI Arbiter Control (see #01066)
 42h    BYTE    PCI Arbiter Priority Control (see #01067)
 43h    BYTE    (82378ZB) PCI Arbiter Priority Control Extension Register
                bit 0: bank 3 fixed priority mode select (see also #01067)
                    =0 REQ2# has higher priority
                    =1 REQ3# has higher priority
 44h    BYTE    MEMCS# Control (see #01068)
 45h    BYTE    MEMCS# Bottom of Hole (address bits 23-16)
 46h    BYTE    MEMCS# Top of Hole (address bits 23-16)
 47h    BYTE    MEMCS# Top of Memory
                (address bits 28-21 == size in 2M increments, less 1)
 48h    BYTE    ISA Address Decoder Control (see #01069)
 49h    BYTE    ISA Address Decoder ROM Block Enable (see #01070)
 4Ah    BYTE    ISA Address Decoder Bottom of Hole (address bits 23-16)
 4Bh    BYTE    ISA Address Decoder Top of Hole (address bits 23-16)
 4Ch    BYTE    ISA Controller Recovery Time (see #01087)
 4Dh    BYTE    ISA Clock Divisor (see #01071)
 4Eh    BYTE    Utility Bus Chip Select Enable A (see #01072)
 4Fh    BYTE    Utility Bus Chip Select Enable B (see #01073)
 50h  4 BYTEs   reserved
 54h    BYTE    MEMCS# Attribute Register #1 (see #01074)
                attributes for 16K blocks from C0000h-CFFFFh
 55h    BYTE    MEMCS# Attribute Register #2 (see #01074)
                attributes for 16K blocks from D0000h-DFFFFh
 56h    BYTE    MEMCS# Attribute Register #3 (see #01074)
                attributes for 16K blocks from E0000h-EFFFFh
 57h    BYTE    (82378) Scatter/Gather Relocation Base Adress (see #01075)
                (82379AB) reserved
 58h  8 BYTEs   reserved
 60h    BYTE    (82378ZB) IRQ0# Route Control (see #01076)
 61h    BYTE    (82378ZB) IRQ1# Route Control (see #01076)
 62h    BYTE    (82378ZB) IRQ2# Route Control (see #01076)
 63h    BYTE    (82378ZB) IRQ3# Route Control (see #01076)
 64h 12 BYTEs   reserved
 70h    BYTE    (82378) reserved
                (82379AB, write-only) PIC/APIC Configuration Control
                          (see #01077)
 71h    BYTE    (82378) reserved
                (82379AB, write-only) APIC Base Address Relocation
                  (see #01078,MEM FEC00000h)
 72h 14 BYTEs   reserved
 80h    WORD    BIOS timer base address (see PORT 0078h)
                bits 15-2 are bits 15-2 of BIOS timer port address
                bit 1: reserved (0)
                bit 0: timer enabled (if disabled, other bits ignored)
 82h 30 BYTEs   unused???
 A0h    BYTE    SMI Control (see #01079)
 A1h    BYTE    reserved
 A2h    WORD    SMI Enable (see #01080)
 A4h    DWORD   System Event Enable (SEE) (see #01081)
 A8h    BYTE    Fast-Off Timer (in minutes)
 A9h    BYTE    reserved
 AAh    WORD    active SMI Requests (see #01082)
 ACh    BYTE    (82378ZB) Clock Throttle STPCLK# Low Timer
                duration of STPCLK# low period in 32 microsecond units
 ADh    BYTE    reserved
 AEh    BYTE    (82378ZB) Clock Throttle STPCLK# High Timer
                duration of STPCLK# high period in 32 microsecond units
 AFh 81 BYTEs   reserved
SeeAlso: #01055,#01167,PORT 040Ah"82378ZB"

Bitfields for Intel 82378/82379 PCI Control:
Bit(s)  Description     (Table 01065)
 7      reserved (0)
 6      DMA Reserved Page Register Aliasing Control
        =0 alias PORT 80h-8Fh to PORT 90h-9Fh
 5      Interrupt Acknowledge Enable
        =0 ignore INTA cycles on the PCI bus, but still allow 8259 register
          access and poll-mode functions
 4-3    Subtractive Decoding Sample Point
        00 slow sample point
        01 typical
        10 fast sample point
        11 reserved
 2      PCI Posted Write Buffer Enable
 1      ISA Master Line Buffer Configuration
        =0 single-transaction mode
        =1 eight-byte mode for ISA bus master transfers
 0      DMA Line Buffer Configuration
        =0 single-transaction mode
        =1 eight-byte mode
SeeAlso: #01064,#01066

Bitfields for Intel 82378/82379 PCI Arbiter Control:
Bit(s)  Description     (Table 01066)
 7-5    reserveed (0)
 4-3    Master Retry Timer
        00 disabled (retries never masked)
        01 retries unmasked after 16 PCICLKs
        10 retries unmasked after 32 PCICLKs
        11 retries unmasked after 64 PCICLKs
 2      Bus Park
        =1 park CPUREQ# on PCI bus when 82378 detects PCI bus idle
 1      Bus Lock
        =0 resource lock
        =1 Bus lock
 0      Guaranteed Access Time
        =1 ISA bus masters are guaranteed 2.5 microsecond CHRDY time-out
SeeAlso: #01064,#01065

Bitfields for Intel 82378/82379 PCI Arbiter Priority Control:
Bit(s)  Description     (Table 01067)
 7      bank 3 rotate control
 6      bank 2 rotate control
 5      bank 1 rotate control
 4      bank 0 rotate control
 3      bank 2 fixed priority mode select B
 2      bank 2 fixed priority mode select A
 1      bank 1 fixed priority mode select
 0      bank 0 fixed priority mode select
Note:   if both 'rotate' and 'fixed' bits are set for a given bank,
          that bank will be in rotating-priority mode
SeeAlso: #01064,#01066

Bitfields for Intel 82378/82379 MEMCS# Control Register:
Bit(s)  Description     (Table 01068)
 7-5    reserved (0)
 4      MEMCS# Master Enable
 3      write enable for 0F0000h-0FFFFFh
 2      read enable for 0F0000h-0FFFFFh
 1      write enable for 080000h-09FFFFh
 0      read enable for 080000h-09FFFFh
SeeAlso: #01064

Bitfields for Intel 82378/82379 ISA Address Decoder Control Register:
Bit(s)  Description     (Table 01069)
 7-4    ISA memory cycle forwarding to PCI
        0000-1111 = 1M-16M top of ISA memory; any accesses above programmed
                  limit are forwarded to PCI bus
 3-0    ISA/DMA memory cycle to PCI bus enables
        bit 3: 896K-960K (E000h-EFFFh)
        bit 2: 640K-768K (A000h-BFFFh)
        bit 1: 512K-640K (8000h-9FFFh)
        bit 0: 0K-512K   (0000h-7FFFh)
SeeAlso: #01064,#01070

Bitfields for Intel 82378/82379 ISA Address Decoder ROM Block Enable:
Bit(s)  Description     (Table 01070)
 7      enable 880K-896K (EC00h-EFFFh)
 6      enable 864K-880K (E800h-EBFFh)
 5      enable 848K-864K (E400h-E7FFh)
 4      enable 832K-848K (E000h-E3FFh)
 3      enable 816K-832K (DC00h-DFFFh)
 2      enabel 800K-816K (D800h-DBFFh)
 1      enable 784K-800K (D400h-D7FFh)
 0      enable 768K-784K (D000h-D3FFh)
Note:   ISA accesses within any enabled ranges are forwarded to the PCI bus
SeeAlso: #01064,#01069

Bitfields for Intel 82378/82379 ISA Clock Divisor Register:
Bit(s)  Description     (Table 01071)
 7      reserved (0)
 6      enable positive decode of upper 64K BIOS at 000F0000h-000FFFFFh,
          FFEF0000h-FFEFFFFFh, and FFFF0000h-FFFFFFFFh
 5      coprocessor error enable
        =1 FERR# is driven onto IRQ13
 4      IRQ12/Mouse Function Enable
        =0 standard IRQ12
        =1 mouse
 3      RSTDRV enable
        =1 assert RSTDRV until this bit cleared (for use in changing ISA bus
          speed)
 2-0    PCICLK-to-ISA SYSCLK divisor
        000     4
        001     3
        other   reserved
SeeAlso: #01064,#01069

Bitfields for Intel 82378/82379 Utility Bus Chip Select A Register:
Bit(s)  Description     (Table 01072)
 7      extended BIOS enable (decode accesses to FFF80000h-FFFDFFFFh)
 6      lower BIOS enable (decode accesses to E0000h-EFFFFh,
          FFEE0000h-FFEEFFFFh, and FFFE0000h-FFFEFFFFh)
 5      (82378ZB) floppy disk primary/secondary address select
        =1 use secondary address range
 4      (82378ZB) IDE Decode enable
 3,2    floppy disk address locations enable
 1      keyboard controller address location enable
        enables I/O addresses 60h,62h,64h,66h (82378ZB) or 60h/64h (82379AB)
 0      RTC address location enabled
        =1 enable decode of I/O ports 70h-77h
SeeAlso: #01064,#01089,#01073

Bitfields for Intel 82378ZB/82379 Utility Bus Chip Select B Register:
Bit(s)  Description     (Table 01073)
 7      configuration RAM decode enable
        =1 permit write accesses to I/O port 0C00h and r/w to ports 08xxh
 6      enable PORT 0092h
 5-4    parallel port enable
        00 LPT1 (ports 03BCh-03BFh)
        01 LPT2 (ports 0378h-037Fh)
        10 LPT3 (ports 0278h-027Fh)
        11 disabled
 3-2    serial port B enable
        00 COM1 (03F8h-03FFh)
        01 COM2 (02F8h-02FFh)
        10 reserved
        11 port B disabled
 1-0    serial port A enable
        00 COM1 (03F8h-03FFh)
        01 COM2 (02F8h-02FFh)
        10 reserved
        11 port A disabled
Note:   if both serial ports are set to the same address, port B is disabled
SeeAlso: #01064,#01072,PORT 0092h

Bitfields for Intel 82378/82379 MEMCS# Attribute Register 1/2/3:
Bit(s)  Description     (Table 01074)
 7      write-enable xC000h-xFFFFh expansion ROM
 6      read-enable xC000h-xFFFFh expansion ROM
 5      write-enable x8000h-xBFFFh expansion ROM
 4      read-enable x8000h-xBFFFh expansion ROM
 3      write-enable x4000h-x7FFFh expansion ROM
 2      read-enable x4000h-x7FFFh expansion ROM
 1      write-enable x0000h-x3FFFh expansion ROM
 0      read-enable x0000h-x3FFFh expansion ROM
Note:   x = C/D/E depending on the attribute register
SeeAlso: #01064

Bitfields for Intel 82378ZB Scatter Gather Relocation Base Address:
Bit(s)  Description     (Table 01075)
 7-0    bits 15-8 of base address for scatter/gather I/O ports
        (default 04h; low 8 bits of address are always 10h-3Fh)
SeeAlso: #01064,#01074,#01076,PORT 040Ah"82378ZB",#P0039

Bitfields for Intel 82371/82378/82379 PCI IRQ Route Control Register:
Bit(s)  Description     (Table 01076)
 7      disable IRQ routing
 6-4    reserved (0)
 3-0    ISA IRQ number to which to route the PCI IRQ
Note:   IRQs 0-2, 8, and 13 are reserved
SeeAlso: #01064,#01167,#01100

Bitfields for Intel 82379AB PIC/APIC Configuration Control Register:
Bit(s)  Description     (Table 01077)
 7-2    reserved
 1      SMI Routing Control
        =1 SMI via APIC
        =0 SMI via SMI# signal
 0      INT Routing Control
        =1 INT disabled (requires that APIC be enabled)
        =0 INT enabled
SeeAlso: #01064,#01078

Bitfields for Intel 82379AB/82371 APIC Base Address Relocation:
Bit(s)  Description     (Table 01078)
 7      reserved
 6      (82379AB) reserved
 6      (82371) A12 mask
        =1 ignore address bit 12 in APIC address
 5-0    bits 15-10 of APIC memory address (ORed with FEC00000h to form base
          address)
SeeAlso: #01064,#01167,#01077,MEM FEC00000h

Bitfields for Intel 82378/82379 SMI Control Register:
Bit(s)  Description     (Table 01079)
 7      reserved
 6      (82378) reserved
        (82379) require Stop Grant bus cycle before asserting STPCLK#
 5-4    reserved
 3      Fast-Off Timer freeze
 2      STPCLK# scaling enable
        =1 enable Clock Throttle bytes in PCI configuration space
 1      STPCLK# signal enable
        =1 assert STPCLK# on read from PORT 00B2h
 0      SMI# Gate
        =1 enable SMI# on system management interrupt
Notes:  bit 1 is cleared either with an explicit write of 0 here, or by any
          write to PORT 00B2h
        bit 0 does not affect the recording of SMI events, so a pending SMI
          will cause an immediate SMI# when the bit is set
SeeAlso: #01064,#01080,#01081,#01222,PORT 00B2h

Bitfields for Intel 82371/82378/82379 SMI Enable Register:
Bit(s)  Description     (Table 01080)
 15-9   reserved
 8      (82371SB only) Legacy USB SMI enable
 7      APMC Write SMI enable
        =1 generate SMI on write to PORT 00B2h
 6      EXTSMI# SMI enable
 5      Fast-Off Timer SMI enable
 4      IRQ12 (PS/2 mouse) SMI enable
 3      IRQ8 (RTC alarm) SMI enable
 2      IRQ4 (COM1/COM3) SMI enable
 1      IRQ3 (COM2/COM4) SMI enable
 0      IRQ1 (keyboard) SMI enable
SeeAlso: #01064,#01079,#01081,#01167,PORT 00B2h

Bitfields for Intel 82371/82378/82379 System Event Enable Register:
Bit(s)  Description     (Table 01081)
 31     Fast-Off SMI enable (system and break events)
 30     (82379 only) Fast-Off Interrupt Enable (break events only)
 30     (82371 only) INTR enable (break events only)
 29     Fast-Off NMI enable (system and break events)
 28     (82371SB only) Fast-Off APIC enable (break events only)
 27     (82379 only) Fast-Off COM enable (system events only)
 26     (82379 only) Fast-Off LPT enable (system events only)
 25     (82379 only) Fast-Off Drive enable (system events only)
 24     (82379 only) Fast-Off DMA enable (system events only)
 23-16  reserved
 15-3   Fast-Off IRQ (15-3) enable (system and break events)
 2      reserved
 1-0    Fast-Off IRQ (1-0) enable (system and break events)
Note:   any enabled system event restarts the Fast-Off Timer, thus preventing
          a Fast-Off powerdown; any enabled break event awakens the system from
          powerdown
SeeAlso: #01064,#01079,#01080,#01082,#01167

Bitfields for Intel 82371/82378/82379 SMI Request Register:
Bit(s)  Description     (Table 01082)
 15-9   reserved
 8      (82371SB only) Legacy USB SMI status
 7      APM SMI Status (write to PORT 00B2h triggered SMI)
 6      EXTSMI# SMI Status (EXTSMI# line triggered SMI)
 5      Fast-Off Timer expired
 4      IRQ12 triggered SMI
 3      IRQ8 triggered SMI
 2      IRQ4 triggered SMI
 1      IRQ3 triggered SMI
 0      IRQ1 triggered SMI
Note:   software must explicitly reset the appropriate bits
SeeAlso: #01064,#01081,#01167

Format of PCI Configuration data for Intel 82425EX PSC:
Offset  Size    Description     (Table 01083)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 0486h)
 40h    BYTE    PCI control register (see #01084)
 41h  3 BYTEs   ???
 44h    BYTE    host device control register (see #01085)
 45h  3 BYTEs   ???
 48h    WORD    PCI local-bus IDE control register (see #01086)
 4Ah  2 BYTEs   ???
 4Ch    BYTE    ISA I/O recovery timer register (see #01087)
 4Dh    BYTE    part revision register (see #01088)
 4Eh    BYTE    X-bus Chip Select A register (see #01089)
 4Fh    BYTE    X-bus Chip Select B register??? (see also #01102)
 50h    BYTE    host select register
 51h    BYTE    deturbo frequency control register
                when deturbo mode is selected (see PORT 0CF9h), the chipset
                  places a hold on the memory bus for a fraction of the
                  time inversely proportional to the value in this register
                  (i.e. C0h = 1/4, 80h = 1/2, 40h = 3/4, 20h = 7/8, etc.)
 52h    WORD    secondary (L2) cache control register
 54h  2 BYTEs   ???
 56h    WORD    DRAM control register
 58h    BYTE    ???
 59h  7 BYTEs   Programmable Attribute Map (PAM) registers 0-6 (see also #01118)
 60h  5 BYTEs   DRAM row boundary registers 0-4
                each register N indicates amount of memory in rows 0-N (each
                  row is 64 bits wide); the fifth row of memory (if
                  implemented) must contain either 8M or 16M, depending on
                  system configuration
                boundary register 4 (offset 64h) contains the total system
                  memory, which may not exceed 128M
 65h    BYTE    ???
 66h    BYTE    PIRQ route control register 0
 67h    BYTE    PIRQ route control register 1
 68h    BYTE    DRAM memory hole register
 69h    BYTE    top of memory
 6Ah  6 BYTEs   ???
 70h    BYTE    SMRAM control register
 71h 47 BYTEs   unused???
 A0h    BYTE    SMI control register
 A1h    BYTE    ???
 A2h    WORD    SMI enable register
 A4h    DWORD   system event enable
 A8h    BYTE    fast off timer register
 A9h    BYTE    ???
 AAh    WORD    SMI request register
 ACh    BYTE    clock throttle STPCLK# low timer
 ADh    BYTE    unused???
 AEh    BYTE    clock throttle STPCLK# high timer
 AFh    BYTE    ???
 B0h 80 BYTEs   unused???
SeeAlso: #00878,#01063,#01055,#01108,#01167

Bitfields for Intel 82425EX PCI control register:
Bit(s)  Description     (Table 01084)
 0      CPU-to-PCI byte merging
 1      CPU-to-PCI bursting enable
 2      PCI posted-write buffer enable
 4-3    subtractive decode sampling point
        00 slow
        01 typical
        10 fast
        11 reserved
 5      DRAM parity error enable
 6      target abort error enable
 7      reserved
SeeAlso: #01083,#01085,#01086,#01087

Bitfields for Intel 82425EX host device control register:
Bit(s)  Description     (Table 01085)
 0      HRDY# maximum signal sampling point
        0 slow timing
        1 fast timing
 1      HDEV# signal sampling point
        0 slow timing
        1 fast timing
 2      host device present
 7-3    reserved
SeeAlso: #01083,#01084

Bitfields for Intel 82425EX local-bus IDE control register:
Bit(s)  Description     (Table 01086)
 1-0    primary/secondary PCI IDE enable
        00 IDE disabled
        01 primary (ports 01F0h-01F7h,03F6,03F7h)
        10 secondary (ports 0170h-017Fh,0376h,0377h)
        11 reserved
 3-2    fast timing bank drive select 1
        bit 2 = drive 0 enabled
        bit 3 = drive 1 enabled
 5-4    IORDY sample point Enable Drive Select
        bit 4 = drive 0 enabled
        bit 5 = drive 1 enabled
 7-6    reserved
 9-8    IORDY sample point
        00 6 clocks
        01 5 clocks
        10 4 clocks
        11 3 clocks
 12-10  recover time (000 = 8 PCI clocks, 001 = 7, ..., 101 = 3, 110/111 = 3)
 15-13  reserved
SeeAlso: #01083,#01084

Bitfields for Intel chipset ISA I/O recovery timer register:
Bit(s)  Description     (Table 01087)
 7      (82425EX/82371) DMA reserved page register aliasing disable
        =0 ports 0090h-009Fh alias ports 0080h-008Fh
        =1 ports 0090h-009Fh forwarded to ISA bus
 6      8-bit I/O recovery enable
 5-3    8-bit I/O recovery time
        000 = 8 SYSCLKs
        001-110 = 1-7 SYSCLKs
 2      16-bit I/O recovery enable
 1-0    16-bit I/O recovery time
        00 = 4 SYSCLKs
        01-11 = 1-3 SYSCLKs
SeeAlso: #01064,#01083,#01084,#01167,#01170

Bitfields for Intel 82425EX part revision register:
Bit(s)  Description     (Table 01088)
 7-5    fabrication house identifier (read-only)
 4      E0000h-EFFFFh ISA-to-main-memory forwarding enabled
 3-0    revision ID (read-only)
SeeAlso: #01083,#01089

Bitfields for Intel 82425EX/82371 X-bus Chip Select A register:
Bit(s)  Description     (Table 01089)
 7      extended BIOS enabled at FFF80000h-FFFDFFFFh
 6      lower (E000h) BIOS enabled
 5      trigger IRQ13 on FERR#
 4      IRQ12 mouse function enabled
 3      (82371AB only) alias accesses to PORTs 63h/65h/67h to 61h
        (else) reserved (0)
 2      BIOS memory write protect
 1      keyboard controller addresses (60h,62h,64h,66h) enabled
 0      RTC addresses (70h-77h) enabled
SeeAlso: #01083,#01167,#01088,#01102

Format of PCI Configuration Data for Intel 82380AB PCI-ISA Bridge:
Offset  Size    Description     (Table 01090)
 00h 64 BYTEs   header (see #00878)
                (vender ID 8086h, device ID 123Ch)
 40h    BYTE    I/O Recovery Register (see #01091)
 41h    BYTE    reserved
 42h    BYTE    MISA Error Status (see #01092)
 43h 189 BYTEs  reserved
SeeAlso: #00873,#01093

Bitfields for Intel 82380AB I/O Recovery Register:
Bit(s)  Description     (Table 01091)
 7      SYSCLK select
        0 SYSCLK = PCICLK/4
        1 SYSCLK = PCICLK/3
 6      enable 8-bit I/O recovery
 5-3    additional recovery time for 8-bit I/O cycles, in SYSCLKs
 2      enable 16-bit I/O recovery
 1-0    additional recovery time for 16-bit I/O cycles, in SYSCLKs
SeeAlso: #01090

Bitfields for Intel 82380AB MISA error status:
Bit(s)  Description     (Table 01092)
 7-3    reserved
 2      IOCHK# asserted
 1      reserved
 0      illegal byte lane combination for PCI I/O detected
SeeAlso: #01090

Format of PCI Configuration data for Intel 82380FB PCI-PCI Bridge (MPCI2):
Offset  Size    Description     (Table 01093)
 00h 64 BYTEs   header type 1 [bridge] (see #00878)
                (vendor ID 8086h, device ID 124Bh)
 40h    BYTE    Connector Control (see #01094)
 41h    BYTE    Connector Event (see #01095)
 42h  2 BYTEs   reserved
 44h    WORD    Serial Bus Interface/Burst Enable (see #01096)
 46h    BYTE    MPCI2 Miscellaneous Status (see #01097)
 47h  5 BYTEs   reserved
 4Ch    WORD    Special Message Encode
                encoded message portion of Special Cycle forwarded by MPCI2
 4Eh 178 BYTEs  reserved
SeeAlso: #00873,#01090

Bitfields for Intel 82380FB Connector Control register:
Bit(s)  Description     (Table 01094)
 7-4    reserved
 3      QEN2 output signal
 2      QEN1 output signal
 1-0    reserved
SeeAlso: #01093

Bitfields for Intel 82380FB Connector Event register:
Bit(s)  Description     (Table 01095)
 7      reserved (1)
 6      activate power-no suspend
 5      (read-only) inverted state of MISAEN pin
 4      (read-only) inverted state of DSTYP pin
 3      undocking permit
        software should set this bit for at least 32 microseconds; when this
          bit is then cleared, the MPCI2 pulses the OPENACK signal for 256 us
          to tell external hardware to "eject" the notebook
 2      reserved (1)
 1      system is docked
 0      open requested
SeeAlso: #01093

Bitfields for Intel 82380FB Serial Interface/Burst Enable register:
Bit(s)  Description     (Table 01096)
 15-13  reserved
 12     enable SERR# on discarding of posted write data
 11     reserved
 10     SDATA signal direction (0 = output, 1 = input)
 9      enable write posting
 8      enable read bursting
 7      enable upstream blind prefetching
 6      reserved
 5      SDATA signal state (read when bit 10 set, write when bit 10 clear)
 4      SDIN signal state
 3      do not pulse P_SERR# when S_PERR# is asserted
 2      cascade/frame determination delay (0 = 20 P_CLKs, 1 = 10 P_CLKs)
 1      serial EEPROM chip select
 0      serial EEPROM clock
SeeAlso: #01093

Bitfields for Intel 82380FB MPCI2 Miscellaneous Status register:
Bit(s)  Description     (Table 01097)
 7-1    reserved
 0      (write-clear) P_SERR# was asserted due to invalidation of posted write
SeeAlso: #01093

Format of PCI Configuration Data for Intel 82439HX:
Offset  Size    Description     (Table 01098)
 00h 64 BYTEs   header (see #00878)
                (vender ID 8086h, device ID 1250h)
                (revision ID 00h = A0 stepping)
 40h 16 BYTEs   reserved
 50h    BYTE    PCI Control (see #01110)
 51h    BYTE    reserved
 52h    BYTE    cache control (see #01112)
 53h  3 BYTEs   reserved
 56h    BYTE    DRAM extended control (see #01115)
 57h    BYTE    DRAM control (see #01116)
 58h    BYTE    DRAM timing (see #01117)
 59h  7 BYTEs   Programmable Attribute Map registers 0-6 (see #01118)
 60h  8 BYTEs   DRAM Row Boundary registers 0-7
                each register N indicates cumulative amount of memory in rows
                  0-N (each 64 bits wide), in 4M units
 68h    BYTE    DRAM Row Type (see #01119)
                bits 0-7 indicate whether each row 0-7 contains EDO DRAM
                  instead of page-mode DRAM
 69h    BYTE    ???
 6Ah  8 BYTEs   reserved
 72h    BYTE    System Management RAM control (see #01123)
 73h 29 BYTEs   reserved
 90h    BYTE    Error Command (see #01126)
 91h    BYTE    Error Status (see #01127) (read-only)
 92h    BYTE    Error Syndrome (read-only)
                latest non-zero ECC error syndrome
 93h 109 BYTEs  reserved
SeeAlso: #01108,#01229

Format of PCI Configuration Data for Intel 82439TX "MTXC":
Offset  Size    Description     (Table 01099)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 7100h)
                (revision ID 00h = A0 stepping)
 40h 15 BYTEs   reserved
 4Fh    BYTE    Arbitration Control register (see #01109)
 50h    BYTE    PCI Control register (see #01110)
 51h    BYTE    reserved
 52h    BYTE    Cache Control register (see #01112)
 53h    BYTE    Extended Cache Control register (see #01113)
 54h    WORD    SDRAM Control Register (see #01114)
 56h    BYTE    DRAM Extended Control register (see #01115)
 57h    BYTE    DRAM Control register (see #01116)
 58h    BYTE    DRAM Timing register (see #01117)
 59h  7 BYTEs   Programmable Attribute Map registers 0-6 (see #01118)
 60h  6 BYTEs   DRAM Row Boundary registers 0-5
                each register N indicates cumulative amount of memory in rows
                  0-N (each 64 bits wide), in 4M units
 66h    BYTE    reserved
 67h    BYTE    DRAM Row Type High register (see #01213)
 68h    BYTE    DRAM Row Type Low register (see #01119)
 69h  7 BYTEs   reserved
 70h    BYTE    Multi-Transaction Timer register
                number of PCLKs guaranteed to the current agent before the
                  82439TX will grant the bus to another PCI agent on request
 71h    BYTE    Extended System Management RAM Control register (see #01149)
 72h    BYTE    System Management RAM Control register (see #01123)
 73h  6 BYTEs   reserved
 79h    BYTE    Miscellaneous Control register (see #01128)
 7Ah 134 BYTEs  reserved
Note:   The Intel 82439TX chipset uses PCI configuration mechanism #1
SeeAlso:  #00873,PORT 0CF8h

Format of PCI Configuration Data for Intel 82371AB (PIIX4), ISA Bridge:
Offset  Size    Description     (Table 01100)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 7110h)
 40h 12 BYTEs   reserved
 4Ch    BYTE    ISA I/O recovery timer (see #01101)
 4Dh    BYTE    reserved
 4Eh    WORD    X-Bus Chip Select (see #01089,#01102)
 50h 16 BYTEs   reserved
 60h    BYTE    PIRQA route control (see #01076)
 61h    BYTE    PIRQB route control (see #01076)
 62h    BYTE    PIRQC route control (see #01076)
 63h    BYTE    PIRQD route control (see #01076)
!!!intel\29056201.pdf p.59
 64h    BYTE    serial IRQ control
 65h  4 BYTEs   reserved???
 69h    BYTE    top of memory
 6Ah    WORD    miscellaneous status
 6Ch 10 BYTEs   reserved???
 76h    BYTE    motherboard device DMA control 0
 77h    BYTE    motherboard device DMA control 1
 78h  9 BYTEs   reserved???
 80h    BYTE    APIC base address relocation
 81h    BYTE    reserved???
 82h    BYTE    deterministic latency control
 83h 13 BYTEs   reserved???
 90h    WORD    PCI DMA configuration
 92h    WORD    distributed DMA (channels 0-3) slave base pointer
 94h    WORD    distributed DMA (channels 5-7) slave base pointer
 96h 26 BYTEs   reserved???
 B0h    DWORD   general configuration
 B4h 23 BYTEs   reserved???
 CBh    BYTE    real-time clock configuration
 CCh 52 BYTEs   reserved
SeeAlso: #00873,#01103,#01104,#01105

Bitfields for Intel PIIX4 ISA I/O recovery timer:
Bit(s)  Description     (Table 01101)
 7      disable aliasing PORTs 90h-9Fh into 80h-8Fh (except PORT 0092h)
 6      enable 8-bit I/O recover timer in bits 5-3
 5-3    additional 8-bit I/O recovery time (added to 3.5 SYSCLK minimum)
        000 = 8 SYSCLKs, else N SYSCLKs
 2      enable 16-bit I/O recovery timer in bits 1-0
 1-0    additional 16-bit I/O recovery time (added to 3.5 SYSCLK minimum)
        00 = 3 SYSCLKs
        01 = 1 SYSCLK
        10 = 2 SYSCLKs
        11 = 4 SYSCLKs
SeeAlso: #01100

Bitfields for Intel 82371 X-Bus Chip Select Enable (high byte):
Bit(s)  Description     (Table 01102)
 7-3    reserved
 2      (82371AB) enable positive PCI decode for Micro Controller at PORTs 62h
          and 66h
 1      (82371AB) enable one-megabyte extended BIOS (FFF00000h-FFF7FFFFh are
          forwarded to ISA bus, aliased to top of 16M region)
 0      enable I/O APIC
SeeAlso: #01089

Format of PCI Configuration Data for Intel 82371AB (PIIX4), IDE Controller:
Offset  Size    Description     (Table 01103)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 7111h)
 20h    DWORD   I/O base address (for 16 contiguous PORTs)
!!!intel\29056201.pdf p.89
 40h    WORD    primary channel timing register
 42h    WORD    secondary channel timing register
 44h    BYTE    slave IDE timing
 45h  3 BYTEs   reserved???
 48h    BYTE    Ultra DMA/33 control
 49h    BYTE    reserved???
 4Ah    WORD    Ultra DMA/33 timing
 4Ch 180 BYTEs  reserved
SeeAlso: #00873,#01100,#01104,#01105

Format of PCI Configuration Data for Intel 82371AB (PIIX4), USB Controller:
Offset  Size    Description     (Table 01104)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 7112h)
 20h    DWORD   I/O base address (for 32 contiguous PORTs)
!!!intel\29056201.pdf p.102
 40h 32 BYTEs   reserved
 60h    BYTE    USB specification release number
                00h pre-release 1.0
                10h release 1.0
 61h 95 BYTEs   reserved
 C0h    WORD    legacy support
 C2h 61 BYTEs   reserved
 FFh    BYTE    miscellaneous support
SeeAlso: #00873,#01100,#01103,#01105

Format of PCI Configuration Data for Intel 82371AB (PIIX4), Power Management:
Offset  Size    Description     (Table 01105)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 7113h)
 40h    DWORD   base address of power-management I/O ports
                (same format as PCI base addresses; low bit hardwired to 1)
 44h    DWORD   initial counts of device 0-11 idle timers
 48h    DWORD   !!!intel\29056201.pdf p.117
 4Ch    DWORD   general-purpose input control
 50h  3 BYTEs   "device resource D"
 53h    BYTE    unused???
 54h    DWORD   device activity event selection A
 58h    DWORD   device activity event selection B
 5Ch    DWORD   "device resource A"
 60h    DWORD   "device resource B"
 64h    DWORD   "device resource C"
 68h  3 BYTEs   "device resource E"
 6Bh  5 BYTEs   unused???
 70h  3 BYTEs   "device resource G"
 73h    BYTE    unused???
 74h    DWORD   "device resource H"
 78h    DWORD   "device resource I"
 7Ch    DWORD   "device resource J"
 80h    BYTE    miscellaneous power management
 81h 15 BYTEs   unused???
 90h    DWORD   base address for SMBus I/O ports
                (same format as PCI base addresses; low bit hardwired to 1)
 94h    ...
 D2h    BYTE    SMBus host configuration
 D3h    BYTE    SMBus slave command
 D4h    BYTE    SMBus slave shadow port 1 address
 D5h    BYTE    SMBus slave shadow port 2 address
 D6h    BYTE    SMBus revision
 D7h
SeeAlso: #00873,#01100,#01103,#01104

Format of PCI Configuration Data for Intel 82437MX:
Offset  Size    Description     (Table 01106)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 1235h)
 40h 16 BYTEs   reserved
 50h    BYTE    PCI Control (see #01111)
 51h    BYTE    reserved
 52h    BYTE    cache control (see #01112)
 53h  4 BYTEs   reserved
 57h    BYTE    DRAM Control (see #01116)
 58h    BYTE    DRAM timing (see #01117)
 59h  7 BYTEs   Programmable Attribute Map registers 0-6 (see #01118)
 60h  4 BYTEs   DRAM Row Boundary Registers 0-3
                each register N indicates cumulative amount of memory in rows
                  0-N, in 4M units (each row is 64 bits wide)
 64h  4 BYTEs   reserved
 68h    BYTE    DRAM Row Type (see #01121)
 69h  9 BYTEs   reserved
 72h    BYTE    System Management RAM control (see #01123)
 73h 141 BYTEs  reserved
SeeAlso: #01108,#01107

Format of PCI Configuration Data for Intel 82437FX:
Offset  Size    Description     (Table 01107)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 122Dh) (see #00873)
 40h 16 BYTEs   reserved
 50h    BYTE    PCI Control (see #01111)
 51h    BYTE    reserved
 52h    BYTE    cache control (see #01112)
 53h  4 BYTEs   reserved
 57h    BYTE    DRAM Control (see #01116)
 58h    BYTE    DRAM timing (see #01117)
 59h  7 BYTEs   Programmable Attribute Map registers 0-6 (see #01118)
 60h  5 BYTEs   DRAM Row Boundary Registers 0-4
                each register N indicates cumulative amount of memory in rows
                  0-N, in 4M units (each row is 64 bits wide)
 65h  3 BYTEs   reserved
 68h    BYTE    DRAM Row Type (see #01121)
 69h  9 BYTEs   reserved
 72h    BYTE    System Management RAM control (see #01123)
 73h 141 BYTEs  reserved
SeeAlso: #01106,#01108

Format of PCI Configuration Data for Intel 82437VX:
Offset  Size    Description     (Table 01108)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 7030h)
                (revision ID 00h = A0 stepping)
 40h 15 BYTEs   reserved
 4Fh    BYTE    arbitration control (see #01109)
 50h    BYTE    PCI Control (see #01110)
 51h    BYTE    reserved
 52h    BYTE    cache control (see #01112)
 53h    BYTE    cache control extensions (see #01113)
 54h    WORD    SDRAM control (see #01114)
 55h    BYTE    reserved
 56h    BYTE    DRAM extended control (see #01115)
 57h    BYTE    DRAM control (see #01116)
 58h    BYTE    DRAM timing (see #01117)
 59h  7 BYTEs   Programmable Attribute Map registers 0-6 (see #01118)
 60h  5 BYTEs   DRAM Row Boundary registers 0-4
                each register N indicates amount of memory in rows 0-N in 4M
                  units (each row is 64 bits wide); the fifth row of memory (if
                  implemented) must contain either 8M or 16M, depending on
                  system configuration
                boundary register 4 (offset 64h) contains the total system
                  memory, which may not exceed 128M
 65h  2 BYTEs   reserved
 67h    BYTE    DRAM Row Type (high)
                defines memory type in DRAM row 4 in bits 4,0 (see #01119)
 68h    BYTE    DRAM Row Type (low) (see #01119)
 69h    BYTE    PCI TRDY timer (see #01122)
 6Ah  6 BYTEs   reserved
 70h    BYTE    Multi-Transaction Timer
                number of PCLKs guaranteed to the current agent before the
                  82437 will grant the bus to another PCI agent on request
 71h    BYTE    reserved
 72h    BYTE    System Management RAM control (see #01123)
 73h    BYTE    shared memory buffer control (see #01124)
 74h    BYTE    shared memory buffer start address, in 0.5MB units
                end address is top-of-memory at offset 64h or start of an
                  enabled PCI memory hole when top-of-memory is 16M
 76h  2 BYTEs   reserved
 78h    BYTE    graphics controller latency timers (see #01125)
 79h 135 BYTEs  reserved
SeeAlso: #00873,#01063,#01083,#01098,#01106

Bitfields for Intel 82437VX,82439TX Arbitration Control register:
Bit(s)  Description     (Table 01109)
 7      extended CPU-to-PIIX PHLDA# signalling enabled
 6-0    (82439TX) reserved
 6-4    reserved
 3      (82437VX) CPU priority enable
        =1 CPU gets PCI bus after two PCI slots
        =0 CPU gets PCI bus after three PCI slots
 2-0    reserved
SeeAlso: #01099,#01108,#01110

Bitfields for Intel 82437VX,82439HX/TX PCI Control register:
Bit(s)  Description     (Table 01110)
 7-4    reserved (82437VX,82439TX)
 7      DRAM ECC/Parity Select (82439HX)
        =1 ECC
        =0 parity
 6      ECC TEST enable (82439HX)
 5      shutdown to port 92h (82439HX)
        =1 send 01h to PORT 0092h on Shutdown special cycle on host bus
 4      dual-processor NA# enable (82439HX)
 3      PCI Concurrency Enable
        =1 CPU can access DRAM/L2 during non-PIIX PCI master cycles
        =0 CPU kept off PCI bus during all PCI bus-master cycles
 2-0    reserved (82437VX,82439TX)
 2      SERR# Output Type (82439HX only)
        =1 SERR# is actively driven high when negated
        =0 SERR# is PCI-compatible open-drain output
 1      reserved
 0      Global TXC Enable (82439HX only)
        =1 enable new 82439HX features
SeeAlso: #01099,#01108,#01098,#01112,#01111

Bitfields for Intel 82437FX/82437MX PCI Control register:
Bit(s)  Description     (Table 01111)
 7-5    CPU inactivity timer (in PCI Clocks less 1)
 4      reserved
 3      enable PCI Peer Concurrency
        =1 CPU can access DRAM/L2 during non-PIIX PCI master cycles
        =0 CPU kept off PCI bus during all PCI bus-master cycles
 2      disable PCI Bursting
 1      disable PCI Streaming
 0      disable Bus Concurrency
SeeAlso: #01106,#01107,#01110

Bitfields for Intel 82437,82439HX/TX cache control register:
Bit(s)  Description     (Table 01112)
 7-6    secondary cache size
        00 none
        01 256K
        10 512K
        11 reserved
 5-4    L2 RAM type
        00 pipelined burst SRAM/DRAM
        01 reserved
        10 asynchronous SRAM (82437FX/MX/VX,82439TX only)
        11 two banks of pipelined burst cache
 3      NA disable
        =1 never assert NA# pin
 2      reserved (82437FX/MX/VX,82439TX)
 2      Extended Cacheability Enable (82439HX)
        =1 cache up to 512M
        =0 cache only first 64M
 1      Secondary Cache Force Miss or Invalidate
        =1 force all memory accesses to bypass L2 cache
 0      First Level Cache Enable
        =1 all memory accesses made non-cacheable by CPU L1 cache
SeeAlso: #01099,#01108,#01098,#01110,#01113,#01114,#01106

Bitfields for Intel 82437VX,82439TX cache control extensions register:
Bit(s)  Description     (Table 01113)
 7-6    reserved
 5      DRAM cache detected (read-only)
 4-0    DRAM cache refresh timer
        number of HCLKs 82437VX,82439TX remains idle during DRAM cache refresh
SeeAlso: #01099,#01108,#01112

Bitfields for Intel 82437VX,82439TX SDRAM control register:
Bit(s)  Description     (Table 01114)
 15-9   reserved
 8-6    Special SDRAM Mode Select
        000 normal mode (default)
        001 enable NOP command
        010 enable All Banks Precharge command
        011 enable Mode Register Command
        100 enable CBR Cycle
        101 reserved
        11x reserved
 5      (82437VX) reserved
 5      (82439TX) RAS# to CAS# Override
        =1 and CAS# latency=0, RAS# to CAS# is delayed 2 HCLKs
        =0 RAS# to CAS# delay determined solely by CAS# latency setting
 4      CAS# latency
        =1 latency is 2 for all SDRAM cycles
        =0 latency is 3
 3      RAS# precharge and refresh timing
        =0 slower
        =1 faster
 2      reserved
 1      (82437VX) reserved
 1      (82439TX) 64-Mbit Technology Enable
        =1 supports 64M-bit SDRAM devices
        =0 supports 64M-bit EDO/FPM devices only
 0      reserved
SeeAlso: #01099,#01108,#01112

Bitfields for Intel 82437VX,82439HX/TX DRAM extended control register:
Bit(s)  Description     (Table 01115)
 7      reserved
 6      (VX/TX) refresh RAS# assertion length (0=4 clocks, 1=5 clocks)
 5      (VX/TX) Fast EDO Path Select
 4      Speculative Leadoff Disable
 3      (82439HX) Turn-Around Insertion Enable
        =1 insert one extra clock of turnaround time after asserting MWE#
 2-1    Memory Address Drive Strength
        82437VX:             82439HX:                  82439TX:
          00 reserved          00 8mA                    00 10mA/10mA (MA/MWE#)
          01 10mA (default)    01 8mA/12mA (MAA/MWE#)    01 10mA/16mA (MA/MWE#)
          10 16mA              10 12mA/8mA (MAA/MWE#)    10 16mA/10mA (MA/MWE#)
          11 reserved          11 12mA                   11 16mA/16mA (MA/MWE#)
 0      (82437VX) DRAM Symmetry Detect Mode
        (used to force some memory address lines to fixed value for detecting
          DRAM symmetry row-by-row)
 0      (82439HX) 64MBit Mode Enable
        =1 enable support for 64M SIMMs
 0      (82439TX) reserved
SeeAlso: #01099,#01108,#01098,#01116

Bitfields for Intel 82437,82439HX/TX DRAM control register:
Bit(s)  Description     (Table 01116)
 7-6    DRAM Hole Enable
        00 none
        01 512K-640K
        10 15M-16M (82437FX/MX/VX only)
        11 14M-16M (82437VX,82439TX only)
 5      reserved
 4      (82437MX only) refresh type during Suspend
        =1 self-refreshing DRAMs in system
        =0 CAS-before-RAS refresh
        (82439TX only) Enhanced Paging disabled
 3      EDO Detect Mode enable
        (used to detect whether memory is EDO bank-by-bank)
 2-0    DRAM refresh rate
             FX/VX/HX    MX          TX
        000  disabled    15.6 us     disabled
        001  50 MHz      31.2 us     15.6 us
        010  60 MHz      62.4 us     31.2 us
        011  66 MHz      125 us      64.4 us
        100  reserved    250 us      125 us
        101  reserved    reserved    256 us
        1xx  reserved    reserved    reserved
SeeAlso: #01099,#01108,#01098,#01115,#01106

Bitfields for Intel 82437FX/MX/VX,82439HX/TX DRAM timing register:
Bit(s)  Description     (Table 01117)
 7      (82437FX,82439TX) reserved
 7      (82437MX) MA[11:2] buffer strength
        =0 8mA
        =1 12mA
 7      (82437VX) MA-to-RAS# Delay
        =1 one clock
        =0 two clocks
 7      (82439HX) Turbo Read Leadoff
        =1 bypass first register in DRAM data pipeline, saving one clock
        (may only be set in a cacheless configuration)
 6-5    DRAM Read Burst Timing
        00 x444 (EDO and Standard Page Mode)
        01 x333 (EDO), x444 (SPM)
        10 x222 (EDO), x333 (SPM)
        11 x322 (EDO), x333 (SPM) (82437VX only)
        11 reserved (other)
 4-3    DRAM Write Burst Timing
        00 x444
        01 x333
        10 x222
        11 reserved
 2      (82439TX) reserved
 2      RAS-to-CAS Delay
        =1 two clocks
        =0 three clocks
 1-0    DRAM Leadoff Timing
        82437FX/MX  Read Leadoff  Write Leadoff  RAS# Precharge
          00            8           6              3
          01            7           5              3
          10            8           6              4
          11            7           5              4
        82437VX,82439TX  Read  Write Leadoff  RAS# Precharge
          00           11           7              3
          01           10           6              3
          10           11           7              4
          11           10           6              4
        82439HX  Read Leadoff  Write Leadoff  RAS# Precharge
          00            7           6              3
          01            6           5              3
          10            7           6              4
          11            6           5              4
SeeAlso: #01099,#01108,#01116,#01106,#01107

Bitfields for Intel 8243x/8244x Programmable Attribute Map Register:
Bit(s)  Description     (Table 01118)
 7      reserved
 6      cache enable (region 1)
 5      write enable (region 1)
 4      read enable (region 1)
 3      reserved
 2      cache enable (region 0)
 1      write enable (region 0)
 0      read enable (region 0)
Notes:  each programmable attribute map register controls two memory
          regions at the top of the first megabyte of memory
        for the Intel 82441FX and 82443BX/LX, bits 6 and 2 are reserved, as
          cacheability is set using the Pentium Pro/II/Celeron's MTRR registers
          (see MSR 000000FEh)
        Intel 82434,82437FX/MX/VX,82439HX,82441FX,82443EX/LX PAM
          registers/regions:
                PAM0 low: reserved [*]
                PAM0 hi:  segment F000-FFFF
                PAM1 low: segment C000-C3FF
                PAM1 hi:  segment C400-C7FF
                PAM2 low: segment C800-CBFF
                PAM2 hi:  segment CC00-CFFF
                PAM3 low: segment D000-D3FF
                PAM3 hi:  segment D400-D7FF
                PAM4 low: segment D800-DBFF
                PAM4 hi:  segment DC00-DFFF
                PAM5 low: segment E000-E3FF
                PAM5 hi:  segment E400-E7FF
                PAM6 low: segment E800-EBFF
                PAM6 hi:  segment EC00-EFFF
        [*] on the 82434 (and possibly other Intel chipsets), the low nybble of
          PAM0 controls segment 8000-9FFF
SeeAlso: #01055,#01108,#01098,#01099,#01229,#01106,#01107,#01142,#01129

Bitfields for Intel 82437VX,82439TX DRAM Row Type register:
Bit(s)  Description     (Table 01119)
 7,3    row 3 type
 6,2    row 2 type
 5,1    row 1 type
 4,0    row 0 type
        00 SPM DRAM
        01 EDO DRAM
        10 SDRAM
        11 reserved
SeeAlso: #01099,#01108,#01118,#01213

Bitfields for Intel 82439TX DRAM Row Type high register:
Bit(s)  Description     (Table 01213)
 7      Host Frequency detection
        =1 66MHz Bus
        =0 60MHz bus
 5,1    DRAM Row 5 type
 4,0    DRAM ROW 4 type
        00 SPM
        01 EDO
        10 SDRAM
        11 reserved
 6,3    reserved
 2      Memory Address select Enabled
SeeAlso: #01099,#01119

Bitfields for Intel 82437FX/82437MX DRAM Row Type register:
Bit(s)  Description     (Table 01121)
 7-4    reserved
 3-0    DRAM Row N is EDO instead of page-mode DRAM
SeeAlso: #01106,#01107

Bitfields for Intel 82437VX PCI TRDY timer:
Bit(s)  Description     (Table 01122)
 7-3    reserved
 2-0    TRDY timeout value
        000 2 PCICLKs
        001 4 PCICLKs
        010 6 PCICLKs
        011 8 PCICLKs
        1xx reserved
SeeAlso: #01108,#01123

Bitfields for Intel 82437,82439HX/TX,82443BX/EX/LX SMRAM control register:
Bit(s)  Description     (Table 01123)
 7      reserved
 6      SMM Space Open
        =1 make SMM DRAM visible even when not in SMM if bit 4 =0
 5      SMM Space Closed
        =1 no data references permitted to SMM DRAM even in SMM
 4      SMM Space Locked
        =1 force bits 4 and 6 to become read-only; and clear bit 6
 3      SMRAM Enable
        =1 128K DRAM are accessible for use at A000 while in SMM
 2-0    SMM Space Base Segment
        010 segment A000-BFFF
        100 segment C000-CFFF (82437MX,82443EX only)
        other reserved
Note:   bits 5 and 6 must never both be set at the same time
SeeAlso: #01099,#01108,#01098,#01124,#01106,#01107,#01142,#01129

Bitfields for Intel 82437VX Shared Memory Buffer control register:
Bit(s)  Description     (Table 01124)
 7-2    reserved
 1      enable shared memory buffer
 0      redirect shared memory buffer access
        =0 treat SMB area as a hole in system DRAM
SeeAlso: #01108,#01123,#01125

Bitfields for Intel 82437VX Graphics Controller Latency Timer:
Bit(s)  Description     (Table 01125)
 7-6    reserved
 5-3    GC latency for PCI reads (in 4 HCLK multiples) (default=100)
 2-0    GC latency for CPU and PCI writes (in 4 HCLK multiples) (default=011)
SeeAlso: #01108,#01124

Bitfields for Intel 82439HX Error Command register:
Bit(s)  Description     (Table 01126)
 7      SERR# duration
        =0 one PCI clock
        =1 until error flags are cleared
 6-3    reserved
 2      force bad parity on multiple-bit uncorrectable error
 1      assert SERR# on multiple-bit uncorrectable error
 0      assert SERR# on single-bit correctable error
SeeAlso: #01098,#01127

Bitfields for Intel 82439HX Error Status register:
Bit(s)  Description     (Table 01127)
 7-5    DRAM row associated with multi-bit error
 4      multi-bit uncorrectable error occurred (write 1 bit to clear)
 3-1    DRAM row associated with single-bit correctable error
 0      single-bit correctable error occurred (write 1 bit to clear)
SeeAlso: #01098,#01126

Bitfields for Intel 82439TX miscellaneous control register:
Bit(s)  Description     (Table 01128)
 7      reserved
 6      ACPI control register enable
 5      Suspend refresh type (EDO/FPM DRAM only)
        =1 Self refresh (Always for SDRAM)
        =0 CBR refresh
 4      Normal refresh enable
        When set to 1, 82439TX switches from suspend refresh to normal refresh
 3      reserved
 2      Internal clock control disable
        =1 disable
        =0 enable  Disables 82439TX internal clocks during suspend, reducing
          power consumption.
 1-0    reserved
SeeAlso: #01099

Format of PCI configuration for Intel 82443EX/LX Device 0 (Host-PCI):
Offset  Size    Description     (Table 01129)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 7180h)
                chipset is 82443EX if revision >= 03h
 40h 16 BYTEs   reserved
 50h    WORD    PAC Configuration register (See #01131)
 52h    BYTE    reserved
 53h    BYTE    Data Buffer Control register (see #01132)
 54h    BYTE    reserved
 55h    WORD    DRAM Row Type register (see #01133)
 57h    BYTE    DRAM Control register (see #01134)
 58h    BYTE    DRAM Timing register (see #01135)
 59h  7 BYTEs   PAM Configuration registers 0-6 (See #01118)
 60h  8 BYTEs   DRAM Row Boundary registers 0-7
                each register indicates top of memory for a particular row, in
                  8MB units; DIMMs use two rows each, with single-sided DIMMs
                  leaving the odd-numbered rows unpopulated
 68h    BYTE    Fixed DRAM Hole Control register (see #01147)
 69h    BYTE    reserved
 6Ah    WORD    DRAM Extended Mode Select register (see #01136)
 6Ch    DWORD   Memory Buffer Strength Control register (see #01137)
 70h    BYTE    Multi-Transaction Timer register (see #01140)
 71h    BYTE    reserved
 72h    BYTE    System Management RAM Control register (see #01123)
 73h 29 BYTEs   reserved
 90h    BYTE    Error Command register (see #01156)
 91h    BYTE    Error Status 0 register (see #01138)
 92h    BYTE    Error Status 1 register (see #01139)
 93h    BYTE    Reset Control Register (see #01239)
 94h 12 BYTEs   reserved
 A0h    DWORD   AGP Capability register (see #01158)
 A4h    DWORD   AGP Status register (see #01159)
 A8h    DWORD   AGP Command register (see #01160)
 ACh  4 BYTEs   reserved
 B0h    DWORD   AGP Control register (see #01161)
 B4h    BYTE    Arpeture Size Control register (see #01162)
 B5h  3 BYTEs   reserved
 B8h    DWORD   Arpeture Translation Table Base register (see #01163)
 BCh    BYTE    AGP MTT Control register (see #01140)
 BDh    BYTE    AGP Low Priority Transaction timer register (see #01141)
 BCh 67 BYTEs   reserved
Notes:  The 82443EX is virtually identical to the 82443LX, except that it does
          not support ECC type DRAM.
        The Intel 82443EX/LX chipsets use PCI configuration mechanism #1
SeeAlso: #01130,#01142,PORT 0CF8h

Format of PCI configuration for Intel 82443EX/LX Device 1 (PCI-PCI):
Offset  Size    Description     (Table 01130)
 00h 64 BYTEs   header, type 1 [bridge] (see #00878)
                (vendor ID 8086h, device ID 7181h)
                chipset is 82443EX if revision >= 03h
 40h 192 BYTEs  reserved
Note:   The Intel 82443LX chipset uses PCI configuration mechanism #1
SeeAlso: #01129,#01143,PORT 0CF8h

Bitfields for Intel 82443EX/LX (Device 0) PAC Configuration register:
Bit(s)  Description     (Table 01131)
 15     WSC# Handshake Disable
 14     (82443LX) Host Frequency (read-only)
        =1 60MHz
        =0 66MHz
 14     (82443EX) reserved
 13-12  reserved
 11     ??? (Not documented by Intel!)
 10     PCI Agent to Arperture Access Disable
 9      Aperture Access Global Enable
 8-6    (82443EX) reserved
 8-7    (82443LX) DRAM Data Integrety Mode
        00  Non-ECC (no check, no correct)
        01  EC-only (do check, no correct)
        10  reserved
        11 ECC (do check, do correct)
 6      (82443LX) ECC-Test Diagnostic Mode Enabled
 5      MDA Present
        Note:   Controls routing of Monochrome Display Adaptor I/O and memory
                  range accesses. Works in conjunction with the VGA-bit in
                  Bridge Control register of device 1 (see #00901):
                    VGA MDA
                    0   0       MDA and VGA routed to PCI bus
                    0   1       reserved
                    1   0       MDA and VGA routed to AGP bus
                    1   1       VGA routed to AGP bus, MDA routed to PCI bus
 4-0    reserved
SeeAlso: #00901,#01129

Bitfields for Intel 82443EX/LX (Device 0) Data Buffer Control register:
Bit(s)  Description     (Table 01132)
 7      reserved
 6      CPU-to-PCI posting enabled
 5      Write post during I/O Bridge access enabled
 4-0    reserved
SeeAlso: #01129

Bitfields for Intel 82443EX/LX (Device 0) DRAM Row Type register:
Bit(s)  Description     (Table 01133)
 15-14  row 7 type
        0 0  EDO        (Same values for each row)
        0 1  reserved
        1 0  SDRAM
        1 1  empty row
 13-12  row 6 type
 11-10  row 5 type
 9-8    row 4 type
 7-6    row 3 type
 5-4    row 2 type
 3-2    row 1 type
 1-0    row 0 type
SeeAlso: #01129,#01134

Bitfields for Intel 82443EX/LX (Device 0) DRAM Control register:
Bit(s)  Description     (Table 01134)
 7-6    reserved
 5      DRAM EDO Auto-Detect mode enabled
 4      SDRAM power management enabled
 3      reserved
 2-0    DRAM Refresh rate
        000 = Refresh disabled
        001 = Normal (Based on PAC Configuration bit 14)
        010-111 = reserved
SeeAlso: #01129,#01133,#01135

Bitfields for Intel 82443EX/LX (Device 0) DRAM Timing register:
Bit(s)  Description     (Table 01135)
 7      SDRAM RAS to CAS Delay  (1 = 2 clocks, 0 = 3 clocks)
 6      SDRAM CAS Latency       (1 = 2 clocks, 0 = 3 clocks)
 5      SDRAM RAS Precharge Time (1 = 2 clocks, 0 = 3 clocks)
 4      EDO DRAM Read Burst timing
        =1 Read rate is x222
        =0 Read rate is x333
 3      EDO DRAM Write Burst timing
        =1 Write rate is x222
        =0 write rate is x333
 2      EDO RAS Precharge Time  (1 = 3 clocks, 0 = 4 clocks)
 1      EDO RAS to CAS Delay    (1 = 2 clocks, 0 = 3 clocks)
 0      MA Wait State
        =1 Fast (0 wait states for SDRAM, clocks run normally for EDO)
        =0 Slow (1 wait state for SDRAM, add one clock to all EDO timings)
SeeAlso: #01129,#01134

Bitfields for Intel 82443EX/LX DRAM Extended Mode Select register:
Bit(s)  Description     (Table 01136)
 15-8   reserved
 7-5    Operating Mode
        000     Normal operating mode
        001     NOP command enabled
        010     All banks precharge enable
        011     Mode register set command enable
        100     CBR cycle enable
        101-11x reserved
 4      reserved
 3-2    Page timeout select
        00    16 clocks
        01-11 reserved
 1-0    Close both banks control
        00    close both banks on page misses
        01-11 reserved
SeeAlso: #01129

Bitfields for Intel 82443EX/LX Memory Buffer Strength Control register:
Bit(s)  Description     (Table 01137)
 31-30  MAA[1-0] buffer strength
        00  48mA (same values for bits 25-12,5-0)
        01  42mA
        10  22mA
        11  reserved
 29-28  (82443LX only) MECC[7-0] buffer strength
        00  42mA (same values for bits 27-26,11-6)
        01  38mA
        10  33mA
        11  reserved
 27-26  MD[63-0] buffer strength
 25-24  RCSA[0]# & RCSB[0]#/MAB[6] buffer strength
 23-22  (82443LX only) MAB[1-0] buffer strength
 21-20  MAA[13:2] buffer strength
 19-18  RCSA[1]# & RCSB[1]#/MAB[7] buffer strength
 17-16  RCSA[2]# & RCSB[2]#/MAB[8] buffer strength
 15-14  RCSA[3]# & RCSB[3]#/MAB[9] buffer strength
 13-12  (82443LX only) RCSA[4]# & RCSB[4]#/MAB[10] buffer strength
 11-10  (82443LX only) CQDB[5,1]# buffer strength
 9-8    CQDA[5,1]# buffer strength
 7-6    CQDA[7-6,4-2,0]# buffer strength
---82443LX---
 5-4    RCSA[5]# & RCSB[5]#/MAB[11] buffer strength
 3-2    RCSA[6]#/MAB[2] & RCSB[6]#/MAB[12] buffer strength
 1-0    RCSA[7]#/MAB[3] & RCSB[7]#/MAB[13] buffer strength
---82443EX---
 5-0    reserved
SeeAlso: #01129

Bitfields for Intel 82443EX/LX Error Status 0 register:
Bit(s)  Description     (Table 01138)
---82443LX---
 7-5    Multi-bit first error (read-only) Indicates which DRAM row had the
          multi-bit error
 4      Multiple-bit ECC Error occurred flag
 3-1    Single-bit first row error (read-only) Indicates which DRAM row had the
          single-bit error
 0      Single-bit ECC error occurred flag
---82443EX---
 7-0    reserved
Note:   Write a 1 to bits 4 & 0 to clear the flags
SeeAlso: #01129,#01139

Bitfields for Intel 82443EX/LX Error Status 1 register:
Bit(s)  Description     (Table 01139)
 7-3    reserved
 2      AGP non-snoopable access outside of graphics arperture
 1      AGP non-snoopable access outside of main DRAM ranges and arperture
 0      access to invalid graphics arperture translation table entry
Note:   Write a 1 to these bit(s) to clear
SeeAlso: #01129,#01138

Bitfields for Intel 82443EX/LX Multi-Transaction Timer register:
Bit(s)  Description     (Table 01140)
 7-3    Multi-transaction timer count value
 2-0    reserved
SeeAlso: #01129,#01141

Bitfields for Intel 82443EX/LX Low Priority Transaction Timer register:
Bit(s)  Description     (Table 01141)
 7-3    Low priority transaction timer count value
 2-0    reserved
SeeAlso: #01129,#01140

Format of PCI Configuration for Intel 82443BX Device 0 (Host-PCI):
Offset  Size    Description     (Table 01142)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 7190h/7192h)
 10h    DWORD   graphics aperture base address
 2Ch    WORD    subsystem vendor identification (write-once)
 2Eh    WORD    subsystem device identification (write-once)
 40h 16 BYTEs   reserved (0)
 50h    DWORD   440BX Configuration (see #01144)
 54h  3 BYTEs   reserved (0)
 57h    BYTE    DRAM Control (see #01145)
 58h    BYTE    DRAM Timing (see #01146)
 59h  7 BYTEs   Programmable Attribute Map register 0-6 (see #01118)
 60h  8 BYTEs   DRAM Row Boundary registers 0-7
                each register indicates top of memory for a particular row, in
                  8MB units; DIMMs use two rows each, with single-sided DIMMs
                  leaving the odd-numbered rows unpopulated
 68h    BYTE    Fixed DRAM Hole Control (see #01147)
 69h  6 BYTEs   Memory Buffer Strength Control (see #01148)
 6Fh  2 BYTEs   reserved (0)
 71h    BYTE    Intel Reserved (1Fh)
 72h    BYTE    SMRAM Control (see #01123)
 73h    BYTE    Extended SMRAM Control (see #01149)
 74h    WORD    SDRAM Row Page Size (see #01150)
 76h    WORD    SDRAM Control Register (see #01151)
 78h    WORD    Paging Policy Register (see #01152)
 7Ah    BYTE    Power Management Control (see #01153)
 7Bh    WORD    Suspend CBR Refresh Rate Register (see #01154)
 7Dh  3 BYTEs   reserved (0)
 80h    DWORD   Error Address Pointer (see #01155)
 84h 12 BYTEs   reserved (0)
 90h    BYTE    Error Command Register (see #01156)
 91h    WORD    Error Status Register (see #01157)
 93h    BYTE    reserved (0)
 94h    DWORD   Intel Reserved (00006104h)
 98h    WORD    Intel Reserved (0500h)
 9Ah    BYTE    Intel Reserved (0)
 9Bh  5 BYTEs   reserved (0)
 A0h    DWORD   AGP Capability Identifier (see #01158)
 A4h    DWORD   AGP Status Register (read-only) (see #01159)
 A8h    DWORD   AGP Command Register (see #01160)
 ACh  4 BYTEs   reserved (0)
 B0h    DWORD   AGP Control Register (see #01161)
 B4h    BYTE    Aperture Size Control (see #01162)
 B5h  3 BYTEs   reserved (0)
 B8h    DWORD   Aperture Translation Table (see #01163)
 BCh  2 BYTEs   reserved
 BEh    WORD    reserved (0)
 C0h    DWORD   Intel Reserved (0)
 C4h    DWORD   Intel Reserved (0)
 C8h    BYTE    Intel Reserved (18h)
 C9h    BYTE    Intel Reserved (0Ch)
 CAh  3 BYTEs   Memory Buffer Frequency Select (see #01164)
 CDh  3 BYTEs   reserved (0)
 D0h  8 BYTEs   BIOS scratch pad (read-write, init to 0 on reset)
 D8h  8 BYTEs   Intel Reserved (0)
 E0h  2 DWORDs  DRAM Write Thermal Throttling Control (see #01165)
 E8h  8 BYTEs   DRAM Read Therman Throttling Control (see #01165)
 F0h    WORD    Buffer Control Register (see #01166)
 F2h  2 BYTEs   Intel Reserved (0000h)
 F4h    DWORD   Intel Reserved (0000F800h)
                bits 30-29 are "Abort Disable Test Mode" configuration bits
                        and should always be set (according to Intel
                        Specification Update)
 F8h    DWORD   Intel Reserved (00000F20h)
 FCh    DWORD   Intel Reserved (0)
SeeAlso: #00873,#01143,PORT 0022h"82443BX"
!!!intel\29063301.pdf p.34

Format of PCI Configuration for Intel 82443BX Device 1 (PCI-AGP):
Offset  Size    Description     (Table 01143)
 00h 64 BYTEs   header, type 1 [bridge] (see #00878)
                (vendor ID 8086h, device ID 7191h)
 40h 192 BYTEs  reserved
SeeAlso: #00873,#01142,#01130
!!!intel\29063301.pdf p.80

Bitfields for Intel 82443BX (Device 0) NBX Configuration Register:
Bit(s)  Description     (Table 01144)
 31-24  SDRAM rows without ECC (each set bit indicates a row in the SDRAM array
          with does NOT have error correction (bit 24 = row 0; note that double-
          sided DIMMs use two rows, one for the front and one for the back)
 23-19  reserved
 18     DRAM data asserted on host bus on the same clock on which the snoop
          result is sampled, instead of one clock later
 17     ECC signals are always driven for EDO memory
 16     IDSEL redirection
        =0 allocate IDSEL1/AD12 to bridge, never assert external AD12
        =1 allocate IDSEL7/AD18 to bridge, never assert external AD18; PCI
          configuration cycles for Bus0/Device7 are redirected to Bus0/Device1
 15     disable WSC# handshake (uni-processor mode)
 14     Intel Reserved
 13:12  Host/DRAM frequency
        00  100 MHz
        01  reserved
        10  66 MHz
        11  reserved
 11     enable AGP-to-PCI access (note: AGP-to-PCI traffic is not allowed to
          target ISA-bus devices)
 10     disable PCI agent access to graphis aperture (ignored if bit 9 clear)
 9      global enable graphics aperture access
 8:7    DRAM Data Integrity Mode
        00 non-ECC
        01 error checking only (e.g. parity)
        10 ECC mode
        11 ECC mdoe with hardware scrubbing
 6      enable ECC diagnostics mode (when set, ECC lines are forced to zero on
          writes and compared to internally-generated ECC on reads)
 5      monochrome video adapter present on PCI/ISA bus (with primary adapter
          on AGP bus)
        if register 3Eh bit 3 is clear, all VGA cycles are sent to PCI
          regardless of this bit
        otherwise: if clear, all VGA cycles are sent to AGP; if set, all VGA
          cycles except MDA ranges (memory B0000h-B7FFFh and ports 03B4h,03B5h,
          03B8h,03B9h,03BAh,03BFh) are sent to AGP
 4      reserved
 3      enable posting of host USWC (U??? Speculative Write Combine) writes to
          PCI memory
 2      In-Order Queue Depth
        =1 maximum (PPro supports up to 8, but 82443BX only supports depth 4)
        =0 depth forced to 1 (no pipelining on processor bus)
 1:0    reserved
SeeAlso: #01142

Bitfields for 82443BX DRAM Control:
Bit(s)  Description     (Table 01145)
 7-6    reserved
 5      module mode configuration (read-only)
        =0 self-refresh entry is staggered; if "SDRAMPWR" (offset 76h bit 4) is
          set, 3 DIMMs are supported, CKE[5:0] is driven, and dynamic SDRAM
          power-down is available; if "SDRAMPWR" is clear, 4 DIMMs are
          supported but power-down is not available
        =1 self-refresh entry is not staggered; 3 DIMMs are supported, only
          CKE0 is driven, and dynamic power-down is not available
 4:3    DRAM type
        00 EDO
        01 SDRAM
        10 registered SDRAM
        11 reserved
 2:0    DRAM refresh rate
        000 disabled
        001 15.6 microseconds
        010 31.2 microseconds
        011 62.4
        100 124.8
        101 249.6
        else reserved
SeeAlso: #01142

Bitfields for Intel 82443BX DRAM Timing:
Bit(s)  Description     (Table 01146)
 7-2    reserved
 1      add one EDO RASx# wait state for row misses (two tASR instead of one)
 0      add one wait state to first EDO CASx# assertion for page hits
        (2 Tasc instead of 1 Tasc)
SeeAlso: #01142

Bitfields for Intel 82443BX/EX/LX Fixed DRAM Hole Control:
Bit(s)  Description     (Table 01147)
 7-6    Hole Enable
        00 none
        01 512K-640K
        10 15M-16M
        11 reserved
 5-0    reserved (0)
SeeAlso: #01142,#01129

Bitfields for Intel 82443BX Memory Buffer Strength Control:
Bit(s)  Description     (Table 01148)
 47-40  reserved (0)
 39-38  strengths of MAA[13:0], WEA#, SRASA#, SCASA# (settings same as below)
 37-36  strengths of MAB[12:11,9:0], MAB[13,10], WEB#, SRASB#, SCASB#
        00 = 1x (at both 66 and 100 MHz)
        01 reserved
        10 = 2x (at both 66 and 100 MHz)
        11 = 3x (at both 66 and 100 MHz)
 35-34  MD[63:0] buffer strength control 2
        4 DIMM FET config: strength for MD[63:0] path connected to DIMMs 2&3
        3/4 DIMM non-FET config: program to same value as buffer str. ctrl 1
 33-32  MD[63:0] buffer strength control 1
        4 DIMM FET config: strength for MD[63:0] path connected to DIMMs 0&1
        3/4 DIMM non-FET config: programmable based on total load detected on
          all DIMM connectors
        00 = 1x (at both 66 and 100 MHz)
        01 reserved
        10 = 2x (at both 66 and 100 MHz)
        11 = 3x (at 100 MHz only)
 31-30  MECC[7:0] buffer strength control 2
        4 DIMM FET config: strength for MECC[7:0] path connected to DIMMs 2&3
        3/4 DIMM non-FET config: program to same value as buffer str. ctrl 1
 29-28  MECC[7:0] buffer strength control 1
        4 DIMM FET config: strength for MD[63:0] path connected to DIMMs 0&1
        3/4 DIMM non-FET config: programmable based on total load detected on
          all DIMM connectors
        (values same as for MD[63:0] buffer strength)
 27-26  CSB7#/CKE5 buffer strength (same values as bits 37-36)
 25-24  CSA7#/CKE3 buffer strength (same values as bits 37-36)
 23-22  CSB6#/CKE4 buffer strength (same values as bits 37-36)
 21-20  CSA6#/CKE2 buffer strength (same values as bits 37-36)
 19     CSA5#/RASA5#, CSB5#/RASB5# buffer strength
        0 = 1x (at both 66 and 100 MHz)
        1 = 2x (at both 66 and 100 MHz)
 18     CSA4#/RASA4#, CSB4#/RASB4# buffer strength (same values as bit 19)
 17     CSA3#/RASA3#, CSB3#/RASB3# buffer strength (same values as bit 19)
 16     CSA2#/RASA2#, CSB2#/RASB2# buffer strength (same values as bit 19)
 15     CSA1#/RASA1#, CSB1#/RASB1# buffer strength (same values as bit 19)
 14     CSA0#/RASA0#, CSB0#/RASB0# buffer strength (same values as bit 19)
 13-12  DQMA5/CASA5# buffer strength
        00 = 1x (at both 66 and 100 MHz)
        01 reserved
        10 = 2x (at both 66 and 100 MHz)
        11 = 3x (at 66 MHz only)
 11-10  DQMA1/CASA1# buffer strength (same values as bits 37-36)
 9-8    DQMB5/CASB5# buffer strength (same values as bits 13-12)
 7-6    DQMB1/CASB1# buffer strength (same values as bits 13-12)
 5-4    DQMA[7:6,4:2,0]/CASA[7:6,4:2,0]#  buffer strength (as for bits 37-36)
 3-2    CKE1/GCKE buffer strength (same values as bits 37-36)
 1-0    CKE0/FENA buffer strength (same values as bits 37-36)
SeeAlso: #01142

Bitfields for Intel 82439TX/82443BX Extended SMRAM Control register:
Bit(s)  Description     (Table 01149)
 7      SMRAM location
        =0 compatible SMRAM space at segment A000h
        =1 high SMRAM space at addreses 100A0000h to 100FFFFFh (accessing
          physical DRAM addresses A0000h to FFFFFh)
 6      (write-clear) access to extended SMRAM memory range when SMRAM space
          is not open and not in SMM
 5      enable write-through caching of SMRAM
        (forced to 1 by 82443BX, to 0 by 82439TX)
 4      enable L1 caching of SMRAM (forced to 1 by 82443BX)
 3      enable L2 caching of SMRAM (forced to 1 by 82443BX)
 2-1    TSEG size (read-only once SMRAM locked) (see #01123)
        00 128K
        01 256K
        10 512K
        11 1M
 0      enable TSEG (read-only once SMRAM locked) (see #01123)
        when both SMRAM and TSEG are enabled, the top N kilobytes of physical
          DRAM are no longer claimed by the memory controller, and instead
          appear as extended SMRAM at an address 256M higher than the physical
          address
SeeAlso: #01142,#01123,#01099

Bitfields for Intel 82443BX SDRAM Row Page Size:
Bit(s)  Description     (Table 01150)
 15-14  page size for row 7 (back of DIMM4)
        00 two KB
        01 four KB
        10 eight KB
        11 reserved
 13-12  page size for row 6 (front of DIMM4)
 ...
 3-2    page size for row 1 (back of DIMM1)
 1-0    page size for row 0 (front of DIMM1) 
SeeAlso: #01142

Bitfields for Intel 82443BX SDRAM Control Register:
Bit(s)  Description     (Table 01151)
 15-10  reserved (0)
 9-8    add one-clock delay to idle/pipeline DRAM leadoff when =01 (all other
          values are illegal)
 7-5    SDRAM mode select
        000 normal operation
        001 issue NOP command on all CPU-to-SDRAM cycles
        010 issue All-Banks-Precharge command on all CPU-to-SDRAM cycles
        011 issue mode register set command on CPU-to-SDRAM cycles
                (command is driven on memory address lines, so the proper
                address must be calculated for each row of memory to drive
                the correct command; MAx[2:0] must be driven to 010 for
                burst-of-4 mode, MAx3 to 1 for interleave wrap type,
                MAx4 to the value of the CAS# latency bit, MAx[6:5] to 01,
                and MAx[12:7] to 0000000
        100 issue CBR cycles on all CPU-to-SDRAM cycles
        else reserved
 4      "SDRAMPWR" specifies how CKE signals are driven for various DRAM
          configurations; refer to #01145 bit 5
 3      Leadoff Command Timing
        =0 four CS# clocks (100 MHz or 66 MHz desktop if MAA/MAB load > 9)
        =1 three CS# clocks (66 MHz mobile platforms, or desktop w/ load <= 9)
 2      CAS# latency
        =0 three DCLKs
        =1 two DCLKs
 1      SDRAM RAS# to CAS# delay
        =0 three clocks
        =1 two clocks
 0      SDRAM RAS# precharge
        =0 three clocks
        =1 two clocks
SeeAlso: #01142

Bitfields for Intel 82443BX Paging Policy Register:
Bit(s)  Description     (Table 01152)
 15-8   banks per row (bit 7 is row 0, bit 15 is row 7)
        =0 two banks
        =1 four banks
 7-5    reserved
 4      Intel Reserved
 3-0    DRAM Idle Timer ("DIT")
        number of clocks in idle state before all pages are precharged
        0000 no clocks
        0001 2 clocks
        0010 4 clocks
        0011 8 clocks
        0100 10 clocks
        0101 12 clocks
        0110 16 clocks
        0111 32 clocks
        1xxx never (pages are not closed on idle)
SeeAlso: #01142

Bitfields for Intel 82443BX Power Management Control Register:
Bit(s)  Description     (Table 01153)
 7      enable SDRAM power-down for idle rows
 6      enable ACPI control register at PORT 0022h
 5      suspend refresh type
        =0 self-refresh
        =1 CBR mode
 4      enable normal refresh (must be set before accessing RAM after a reset)
 3      quick-start mode enabled (read-only)
 2      enable dynamic clock gating on AGPset "IDLE" condition (all buses in
          idle state)
 1      AGP disabled (read-only)
 0      enable CPU reset without PCIRST enable
SeeAlso: #01142

Bitfields for Intel 82443BX Suspend CBR Refresh Rate:
Bit(s)  Description     (Table 01154)
 15-13  reserved (0)
 12     enable automatic Suspend CBR Refresh Rate adjustment (based on number
          of OSCCLKs in a given time); if clear, the below field must be
          programmed to guarantee minimum refresh rates in the worst case
 11-0   Suspend CBR Refresh Rate (number of OSCCLKs between refresh requests)
SeeAlso: #01142

Bitfields for Intel 82443BX Error Address Pointer:
Bit(s)  Description     (Table 01155)
 31-12  (read-only) bits 31-12 of address in which first parity/ECC error
          occurred
 11-2   reserved
 1      (write-clear) multi-bit error occurred
 0      (write-clear) single-bit error occurred
SeeAlso: #01156,#01142

Bitfields for Intel 82443BX/EX/LX Error Command Register:
Bit(s)  Description     (Table 01156)
 7      enable SERR# on AGP non-snoopable access outside graphics aperture
 6      enable SERR# on invalid AGP DRAM access (82443BX)
        enable SERR# on AGP Non-snoopable access to location outside main DRAM
          and arpeture rangles (82443EX/LX)
 5      enable SERR# on access to invalid Graphics Aperture Translation Table
 4      enable SERR# on receiving Target Abort
 3      enable SERR# when Thermal DRAM Throttling detected (82443BX)
        enable SERR# on PCI Parity Error (82443EX/LX)
---82443BX---
 2      SERR# mode
        =0 asserted for one PCI clock
        =1 level mode signal (for systems that connect SERR# to EXTSMI#)
 1      enable SERR# on receiving multi-bit Parity/ECC error
 0      enable SERR# on receiving single-bit (corrected) ECC error
---82443EX/LX---
 2-0    reserved
Note:   bits 1 and 0 must be clear on systems not supporting ECC
SeeAlso: #01155,#01157,#01142,#01129

Bitfields for Intel 82443BX Error Status Register:
Bit(s)  Description     (Table 01157)
 15-13  reserved (0)
 12     (write-clear) DRAM Read thermal throttling condition occurred
 11     (write-clear) DRAM Write thermal throttling condition occurred
 10     (write-clear) AGP non-snoopable access outside Graphics Aperture
 9      (write-clear) invalid AGP non-snoopable DRAM read access
 8      (write-clear) invalid Graphics Aperture Translation Table entry
 7-5    (read-only) number of DRAM row containing first multi-bit error
 4      (write-clear) multi-bit (uncorrectable) error occurred
 3-1    (read-only) number of DRAM row containing first single-bit error
 0      (write-clear) single-bit (correctable) error occurred
SeeAlso: #01156,#01142

Bitfields for Intel AGP Capability Identifier:
Bit(s)  Description     (Table 01158)
 31-24  reserved
 23-20  major version of supported AGP revision
 19-16  minor version of supported AGP revision
 15-8   offset of next capability (0 = none)
 7-0    PCI capability ID (2 = AGP, 0 = disabled)
SeeAlso: #01142,#01159,#01129

Bitfields for Intel 82443BX/EX/LX AGP Status Register:
Bit(s)  Description     (Table 01159)
 31-24  maximum AGP request queue depth (read-only)
 23-10  reserved
 9      AGP side band addressing is supported (read-only)
 8-2    reserved
 1-0    supported AGP data transfer type(s)
        bit 0: 1x data transfer mode
        bit 1: 2x data transfer mode
Note:   bits 0 and 1 may not both be clear
SeeAlso: #01160,#01142,#01158,#01129

Bitfields for Intel 82443BX/EX/LX AGP Command Register:
Bit(s)  Description     (Table 01160)
 31-10  reserved
 9      enable AGP sideband addressing
 8      enable AGP
 7-2    reserved
 1-0    selected AGP transfer rate
        00 = default
        01 = 1x
        10 = 2x
        11 illegal
SeeAlso: #01159,#01142,#01161,#01129

Bitfields for Intel 82443BX/EX/LX AGP Control Register:
Bit(s)  Description     (Table 01161)
 31-16  reserved (0)
 15     disable forced ordering of snoopable writes and AGP reads (82443BX)
        (82443EX/LX) reserved
 14     reserved (0)
 13     enable Graphics Aperture Write-AGP Read synchronization
 12-10  reserved (0)
 9-8    reserved (0) (82443BX)
        expedite transaction throttle timer (82443EX/LX)
        00 no throttling
        01 reserved
        10 192 clocks on, 64 clocks off
        11 reserved
 7      enable Graphics Translation Lookaside Buffer (and GTLB Flush Control)
 6-0    reserved (0)
SeeAlso: #01160,#01142,#01129

Bitfields for Intel 82443BX/EX/LX Graphics Aperture Size Control:
Bit(s)  Description     (Table 01162)
 7-6    reserved
 5-0    aperture size
        000000 256M
        100000 128M
        110000 64M
        111000 32M
        111100 16M
        111110 8M
        111111 4M
        other illegal
SeeAlso: #01142,#01163,#01129

Bitfields for Intel 82443BX/EX/LX Graphics Aperture Trans. Table Base Register:
Bit(s)  Description     (Table 01163)
 31-12  bits 31-12 of aperture translation table base address 
 11-0   reserved (0)
SeeAlso: #01162,#01142,#01129

Bitfields for Intel 82443BX Memory Buffer Frequency Select:
Bit(s)  Description     (Table 01164)
 23     reserved
 22     MAA[13:0], WEA#, SRASA#, SCASA# buffer select
        =0 66 MHz buffers
        =1 100 MHz buffers
 21     MAB[12:11,9:0]#, MAB[13,10], WEB#, SRASB#, SCASB# buffer select
        (as for bit 22)
 20     MD[63:0] (control 2) buffer select
 19     MD[63:0] (control 1) buffer select
 18     MECC[7:0] (control 2) buffer select
 17     MECC[7:0] (control 1) buffer select
 16     CSB7#/CKE5 buffer select
 15     CSA7#/CKE3 buffer select
 14     CSB6#/CKE4 buffer select
 13     CSA6#/CKE2 buffer select
 12     CSA5#/RASA5#, CSB5#/RASB5# buffer select
 11     CSA4#/RASA4#, CSB4#/RASB4# buffer select
 10     CSA3#/RASA3#, CSB3#/RASB3# buffer select
 9      CSA2#/RASA2#, CSB2#/RASB2# buffer select
 8      CAS1#/RASA1#, CSB1#/RASB1# buffer select
 7      CSA0#/RASA0#, CSB0#/RASB0# buffer select
 6      DQMA5/CASA5# buffer select
 5      DQMA1/CASA1# buffer select
 4      DQMB5/CASB5# buffer select
 3      DQMB1/CASB1# buffer select
 2      DQMA[7:6,4:2,0]/CASA[7:6,4:2,0]# buffer select
 1      CKE1/GCKE buffer select
 0      CKE0/FENA buffer select
SeeAlso: #01142,#01166

Bitfields for Intel 82443BX DRAM Read/Write Thermal Throttling Control:
Bit(s)  Description     (Table 01165)
 63     lock all read and write throttle control register bits (exists in Write
          Throttling control register only)
 62-46  reserved
 45-38  global DRAM sampling window (in four-millisecond units)
 37-26  global QWORD threshold (documented as units of 215, but may be typo and
          actually be units of 2^15 = 32768)
        thermal throttling will be invoked if the number of QWORD accesses
          during the sampling window exceeds the threshold count
 25-20  throttle time in multiples of the sampling window
 19-13  throttle monitoring window in 16 DRAM-clock units
 12-3   throttle QWORD maximum count -- while throttling is enabled, at most
          this many QWORD accesses are permitted during each throttle
          monitoring window
 2-0    DRAM Throttle Mode
        100 normal operation
        else Intel Reserved
SeeAlso: #01142

Bitfields for Intel 82443BX Buffer Control Register:
Bit(s)  Description     (Table 01166)
 15-10  reserved
 9-6    AGP Jam Latch strength
        bit 9: enable strong pull-up
        bit 8: enable weak pull-up
        bit 7: enable strong pull-down
        bit 6: enable weak pull-down
 5-0    Intel Reserved
SeeAlso: #01142,#01164

Format of PCI Configuration for Intel 82371FB/82371SB Function 0 (ISA Bridge):
Offset  Size    Description     (Table 01167)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 122Eh/7000h)
                (revision ID 00h = 82371SB step A-1)
                (revision ID 01h = 82371SB step B-0)
 40h 12 BYTEs   reserved
 4Ch    BYTE    ISA I/O Controller Recovery Timer (see #01087)
 4Dh    BYTE    reserved
 4Eh    BYTE    X-Bus Chip Select Enable (see #01089)
 4Fh    BYTE    (82371SB) X-Bus Chip Select Enable High (see #01102)
                bit 0: I/O APIC enabled
 4Fh    BYTE    (82371FB) reserved
 50h 16 BYTEs   reserved
 60h  4 BYTEs   PCI IRQ Route Control (see #01076)
 64h  5 BYTEs   reserved
 69h    BYTE    top of memory (see #01216)
 6Ah    WORD    miscellaneous status (see #01217)
 6Ch  4 BYTEs   reserved
 70h    BYTE    motherboard IRQ Route Control 0 (see #01218)
 71h    BYTE    (82371FB) motherboard IRQ Route Control 1 (see #01218)
 72h  4 BYTEs   reserved
 76h  2 BYTEs   motherboard DMA control (see #01219)
 78h    WORD    programmable chip select control (see #01220)
 7Ah  6 BYTEs   reserved
 80h    BYTE    (82371SB) APIC Base Address Relocation (see #01078)
 81h    BYTE    reserved
 82h    BYTE    (82371SB) Deterministic Latency Control (see #01221)
 83h 29 BYTEs   reserved
 A0h    BYTE    SMI Control (see #01222)
 A1h    BYTE    reserved
 A2h    WORD    SMI Enable (see #01080)
 A4h    DWORD   System Event Enable (SEE) (see #01081)
 A8h    BYTE    Fast-Off Timer (in minutes, PCICLKs, or milliseconds)
                value is count less one; timer must be stopped before
                  changing its value
 A9h    BYTE    reserved
 AAh    WORD    SMI Request (see #01082)
 ACh    BYTE    Clock Scale STPCLK# Low Timer
                STPCLK# stays low for 1+1056*(value+1) PCICLKs
 ADh    BYTE    reserved
 AEh    BYTE    Clock Scale STPCLK# High Timer
                STPCLK# stays high for 1+1056*(value+1) PCICLKs
 AFh 81 BYTEs   reserved
SeeAlso: #00873,#01214,#01215,#01064,#01083,#01108,#01098

Format of PCI configuration for Intel 82371MX MPIIX:
Offset  Size    Description     (Table 01168)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 1234h)
 40h  9 BYTEs   reserved
 49h    BYTE    serial and parallel port enable (see #01169)
 4Ah  2 BYTEs   reserved
 4Ch    BYTE    Extended I/O Controller Recovery Timer (see #01170)
 4Dh    BYTE    reserved
 4Eh    BYTE    BIOS enable (see #01171)
 4Fh    BYTE    FDC enable (see #01172)
 50h 16 BYTEs   reserved
 60h    BYTE    PIRQA# Route Control (see #01076)
 61h    BYTE    PIRQB# Route Control (see #01076)
 62h  8 BYTEs   reserved
 6Ah    WORD    Miscellaneous Status (see #01173)
 6Ch    WORD    IDE timing modes (see #01223)
 6Eh  2 BYTEs   reserved
 70h    BYTE    Motherboard IRQ Route Control (see #01223)
 71h  5 BYTEs   reserved
 76h  3 BYTEs   Motherboard DMA Route Control (see #01219)
 79h  5 BYTEs   reserved
 7Eh    BYTE    Audio enable (see #01174)
 7Fh    BYTE    DMA channel 5-7 address size (see #01175)
 80h    BYTE    PCI DMA enable (see #01176)
 81h  7 BYTEs   reserved
 88h    BYTE    PCI DMA/PCI DMA expansion A (see #01177)
 89h    BYTE    PCI DMA/PCI DMA expansion B (see #01177)
 8Ah    WORD    Programmable Memory Address Control 0 (see #01178)
 8Ch    WORD    Programmable Memory Address Control 1 (see #01178)
 8Eh    WORD    Programmable Memory Address Mask (see #01179)
 90h    BYTE    Programmable Address Range Enable (see #01180)
 91h    BYTE    reserved
 92h    WORD    Programmable Chip Select Control (see #01181)
 94h    WORD    Programmable Address Control 1 (see #01182)
 96h    WORD    Programmable Address Control 2 (see #01182)
 98h    WORD    Programmable Address Control 3 (see #01182)
 9Ah    BYTE    Programmable Address Mask A (see #01183)
 9Bh    BYTE    Programmable Address Mask B (see #01184)
 9Ch    WORD    I/O configuration address (see #01185)
 9Eh  2 BYTEs   reserved
 A0h    WORD    Programmable Address Control 4 (see #01182)
 A2h    WORD    Programmable Address Control 5 (see #01182)
 A4h    BYTE    Programmable Address Mask C (see #01186)
 A5h    BYTE    Peripheral Access Detect Enable 0 (see #01187)
 A6h    BYTE    Peripheral Access Detect Enable 1 (see #01188)
 A7h    BYTE    Peripheral Access Detect Enable 2 (see #01189)
 A8h    WORD    Local Trap Address for Device 3 (see #01190)
 AAh    BYTE    Local Trap Mask for Device 3 (see #01191)
 ABh    BYTE    Local Trap SMI Enable (see #01192)
 ACh  2 BYTEs   reserved
 AEh    BYTE    Local Trap SMI Status (see #01192)
 AFh    BYTE    reserved
 B0h    BYTE    Local Standby SMI Enable (see #01193)
 B1h    BYTE    Local Standby Timer Reload Enable (see #01194)
 B2h    BYTE    Local Standby SMI Status (see #01193)
 B3h    BYTE    reserved
 B4h    BYTE    Local Standby Timer IDE Idle (see #01195)
 B5h    BYTE    Local Standby Timer Audio Idle  (see #01195)
 B6h    BYTE    Local Standby Timer COM Idle (see #01195)
 B7h    BYTE    reserved
 B8h    BYTE    Local Standby Timer Device 1 Idle (see #01195)
 B9h    BYTE    Local Standby Timer Device 2 Idle (see #01195)
 BAh    BYTE    Local Standby Timer Device 3 Idle (see #01195)
 BBh    BYTE    reserved
 BCh    BYTE    Software/EXTSMI# SMI Delay Timer (see #01195)
 BDh    BYTE    Suspend SMI Delay Timer (see #01195)
 BEh    BYTE    Global Standby Timer (see #01195)
 BFh    BYTE    Clock Throttle Standby Timer (see #01195)
 C0h    BYTE    System Management Control (see #01196)
 C1h    BYTE    System SMI Enable (see #01197)
 C2h    BYTE    Miscellaneous SMI Enable (see #01198)
 C3h    BYTE    Global SMI Enable (see #01200)
 C4h  2 BYTEs   reserved
 C6h    BYTE    System SMI Status (see #01197)
 C7h    BYTE    Miscellaneous SMI Status (see #01199)
 C8h    BYTE    Global SMI Status (see #01201)
 C9h  3 BYTEs   reserved
 CCh    BYTE    Suspend/Resume Control 1 (see #01202)
 CDh    BYTE    Suspend/Resume Control 2 (see #01203)
 CEh    BYTE    SMOUT Control (see #01204)
 CFh    BYTE    reserved
 D0h    BYTE    System Event Enable 0 (see #01207)
 D1h    BYTE    System Event Enable 1 (see #01208)
 D2h    BYTE    System Event Enable 2 (see #01209)
 D3h    BYTE    Burst Count Timer (see #01195)
 D4h    BYTE    Clock Control (see #01205)
 D5h    BYTE    reserved
 D6h    BYTE    STPCLK# Low Timer (see #01195)
 D7h    BYTE    STPCLK# High Timer (see #01195)
 D8h    BYTE    Stop Break Event Enable 0 (see #01207)
 D9h    BYTE    Stop Break Event Enable 1 (see #01208)
 DAh    BYTE    Stop Break Event Enable 2 (see #01209)
 DBh  5 BYTEs   reserved
 E0h    BYTE    Shadow Register (see #01206)
 E1h  3 BYTEs   reserved
 E4h    BYTE    Burst Clock Event Enable 0 (see #01207)
 E5h    BYTE    Burst Clock Event Enable 1 (see #01208)
 E6h    BYTE    Burst Clock Event Enable 2 (see #01209)
 E7h    BYTE    Burst Clock Event Enable 3 (see #01210)
 E8h    BYTE    Burst Clock Event Enable 4 (see #01211)
 E9h    BYTE    Burst Clock Event Enable 5 (see #01212)
 EAh    BYTE    Burst Clock Event Enable 6 (see #01213)
 EBh    BYTE    reserved
 ECH    BYTE    Clock Throttle Break Event Enable 0 (see #01207)
 EDh    BYTE    Clock Throttle Break Event Enable 1 (see #01208)
 EEh    BYTE    Clock Throttle Break Event Enable 2 (see #01209)
 EFh    BYTE    Clock Throttle Break Event Enable 3 (see #01210)
 F0h    BYTE    Clock Throttle Break Event Enable 4 (see #01211)
 F1h    BYTE    Clock Throttle Break Event Enable 5 (see #01212)
 F2h    BYTE    Clock Throttle Break Event Enable 6 (see #01213)
 F3h 13 BYTES   reserved
SeeAlso: #00873,#01076

Bitfields for Intel 82371MX serial and parallel port enable register:
Bit(s)  Description     (Table 01169)
 7      reserved
 6      LPT3 enabled
 5      LPT2 enabled
 4      LPT1 enabled
 3      COM4 enabled
 2      COM3 enabled
 1      COM2 enabled
 0      COM1 enabled
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Extended I/O Controller Recovery Timer register:
Bit(s)  Description     (Table 01170)
 7      reserved
 6      8-Bit I/O Recovery Enable
        =1 Enable value programmed into bits 5-3
 5-3    8-Bit I/O Recovery Times
        000 = 8 SYSCLK
        001 = 1 SYSCLK (default)
        010 = 2 SYSCLK
        011 = 3 SYSCLK
        100 = 4 SYSCLK
        101 = 5 SYSCLK
        110 = 6 SYSCLK
        111 = 7 SYSCLK
 2-0    Reserved (0)
SeeAlso: #01168,#01087,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX BIOS enable register:
Bit(s)  Description     (Table 01171)
 7      Extended BIOS Enable
 6      Lower BIOS Enable 1
 5      Lower BIOS Enable 0
 4      Lower BIOS CS# Enable 0
 3      F Segment BIOS Enable
 2      BIOSCS# Write Protect
 1-0    reserved
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX FDC Enable register:
Bit(s)  Description     (Table 01172)
 7      Coprocessor Error fuction Enable
 6      IRQ12/M Mouse Function Enable
 5      System Management Output 5/Disk Output Enable
 4      System Management Output 4/RTCALE Enable
 3      Motherboad DMA 2 Disable
 2      reserved
 1      Floppy Secondary Addess Enable
 0      Floppy Primary Address Enable
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Miscellaneous Status register:
Bit(s)  Description     (Table 01173)
 15-3   reserved
 2-1    reserved (0)
 0      ISA Clock Divisor Status
        =1 Divisor=3 (PCICLK=25MHz) default
        =0 Divisor=4 (PCICLK=33MHz)
Note:   This is a read-only register that reports on chipset jumper settings.
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Audio enable register:
Bit(s)  Description     (Table 01174)
 7      Audio enabled
 6-4    Reserved
 3-2    Audio I/O Address
        00      0220h
        01      0230h
        10      0240h
        11      0250h
 1-0    reserved
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX DMA channel 5-7 address size register:
Bit(s)  Description     (Table 01175)
 7      Channel 7 16/8-Bit Count by Word/Byte
        =1 16-bit, count by word
        =0 8-bit, count by byte
 6      Channel 6 16/8-Bit Count by Word/Byte (same values as bit 7)
 5      Channel 5 16/8-Bit Count by Word/Byte (same values as bit 7)
4-3     reserved (0)
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX PCI DMA Enable register:
Bit(s)  Description     (Table 01176)
 7      DMA CH7 is on PCI Bus
 6      DMA CH6 is on PCI Bus
 5      DMA CH5 is on PCI Bus
 4      reserved
 3      DMA CH3 is on PCI Bus
 2      DMA CH2 is on PCI Bus
 1      DMA CH1 is on PCI Bus
 0      DMA CH0 is on PCI Bus
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX PCI DMA/PCI DMA expansion registers:
Bit(s)  Description     (Table 01177)
 7-4    reserved
 3      Expansion enabled
 2-0    DMA channel
Note:   The PCI DMA Expansion request lines (REQ[A,B]#/GNT[A,B]#) provide PCI
          DMA and PCI DMA expansion support.
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Programmable Memory Address Control registers:
Bit(s)  Description     (Table 01178)
 15-0   Memory Access Control
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Programmable Memory Address Mask register:
Bit(s)  Description     (Table 01179)
 7-0    Memory Address Mask
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Programmable Address Range Enable register:
Bit(s)  Description     (Table 01180)
 7      PCS# Enabled for Programmable Address Range 2
 6      PCS# Enabled for Programmable Address Range 1
 5      Programmable Address range 5 Enabled
 4      Programmable Address range 4 Enabled
 3      Programmable Address range 5 Enabled
 2      Programmable Address range 3 Enabled
 1      Programmable Address range 1 Enabled
 5      PCS# Address range Enabled
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Programmable Chip Select Control register:
Bit(s)  Description     (Table 01181)
 15-0   PCS# Address
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Programmable Address Control registers:
Bit(s)  Description     (Table 01182)
 15-0   Programmable Address Control
Note:   This register selects a 16-bit I/O address range to be forwarded to
          the Extended I/O Bus, if enabled in the Programmable Address Range
          register.
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Programmable Address Mask A register:
Bit(s)  Description     (Table 01183)
 7-4    Programmable Address Control 1 Mask
 3-0    Programmable Chip Select Mask
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Programmable Address Mask B register:
Bit(s)  Description     (Table 01184)
 7-4    Programmable Address Control 3 Mask
 3-0    Programmable Address Control 2 Mask
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX I/O configuration address register:
Bit(s)  Description     (Table 01185)
 15-10  reserved
 9-1    I/O Configuration Address
 0      I/O Configuration Address Enabled
Note:   This register provides an I/O address range to be forwarded to the
          Extended I/O Bus for accesses to the configuration space of an
          integrated I/O device. PCI address bits 9-1 are compared to bits
          9-1 of this register. Address bits 31-10 must be 0.
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Programmable Address Mask C register:
Bit(s)  Description     (Table 01186)
 7-4    Programmable Address Control 5 Mask
 3-0    Programmable Address Control 4 Mask
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Peripheral Access Detect Enable 0 register:
Bit(s)  Description     (Table 01187)
 7      Enable Audio-E
 6      Enable Audio-D
 5      Enable Audio-C
 4      Enable Audio-B
 3      Enable Audio-A
 2      Enable Parallel 3
 1      Enable Parallel 2
 0      Enable Parallel 1
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Peripheral Access Detect Enable 1 register:
Bit(s)  Description     (Table 01188)
 7      Enable COM4
 6      Enable COM3
 5      Enable COM3
 4      Enable COM1
 3      Enable Secondary FDC
 2      Enable Primary FDC
 1      Enable Secondary IDE
 0      Enable Promary IDE
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Peripheral Access Detect Enable 2 register:
Bit(s)  Description     (Table 01189)
 7      Enable PMAC1
 6      Enable PMAC0
 5      Enable PAC5
 4      Enable PAC4
 3      Enable PAC3
 2      Enable PAC2
 1      Enable PAC1
 0      Enable PCSC
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Local Trap Address for Device 3 register:
Bit(s)  Description     (Table 01190)
 15-0   Local Trap Address base for Device 3
Note:   Is compared with bits 15-0 of PCI I/O Addresses. Address bits 31-16
          must be 0.
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Local Trap Mask for Device 3 register:
Bit(s)  Description     (Table 01191)
 7-4    Local Trap COM Port Select
        =1000   COM4 02E8h-02EFh
        =0100   COM3 03E8h-83EFh
        =0010   COM2 02F8h-02FFh
        =0001   COM1 03F8h-03FFh
Note:   These bits when set cause an SMI# when access to the corresponding I/O
          port range is made.
 3-0    Local Trap Mask
Note:   This field selects the range of trappable addresses (in bytes).
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Local Trap SMI Enable/Status registers:
Bit(s)  Description     (Table 01192)
 7-6    reserved
 5      IDE
 4      Audio
 3      COM
 2      DEV3
 1      DEV2
 0      DEV1
Note:   a set bit indicates in the Enable register turns generation of SMI# on
          I/O accesses to the address region used by the selected device;
          a set bit in the Status register indicates which trap caused an SMI#
          interrupt.
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Local Standby SMI Enable/Status registers:
Bit(s)  Description     (Table 01193)
 7-6    reserved
 5      IDE
 4      Audio
 3      COM
 2      DEV3
 1      DEV2
 0      DEV1
Note:   each bit in the Enable register turns on the associated SMI Timer; a
          set bit in the Status register indicates which local standby timer
          caused the SMI interrupt
SeeAlso: #01168,#01194,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Local Standby Timer Reload Enable register:
Bit(s)  Description     (Table 01194)
 7      IDE
 6      Audio
 5      COM
 4      DEV3
 3      DEV2
 2      DEV1
 1      Audio MDAK2
 0      Audio MDAK1
Note:   This register enables local standby timer reloading. When the
          associated I/O address range is accessed, the standby timer is
          reloaded with it's default value. Also note the different bit-order
          for this register only.
SeeAlso: #01168,#01193,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Count Value registers:
Bit(s)  Description     (Table 01195)
 7-0    Count value
Note:   This field contains the initial count value for various time-out
          events. 00 is an illegal programmed value. The programmed value is
          decremented by certain events or system clocks, and the event is
          triggered when the count reaches 0.
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX System Management Control register:
Bit(s)  Description     (Table 01196)
 7-3    reserved
 2      Freeze (but not reset) all Power Management timers
 1      =0 disable all Power Management functions
 0      =0 disable SMI
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX System SMI Enable/Status registers:
Bit(s)  Description     (Table 01197)
 7      reserved
 6      Write to APMC Port (software SMI)
 5      EXTSMI#
 4      IRQ12
 3      IRQ8
 2      IRQ4
 1      IRQ3
 0      IRQ1
Note:   each set bit in the Enable register turns on SMI# generation for the
          associated hardware event; a set bit in the Status register indicates
          which event caused the SMI interrupt
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Miscellaneous SMI Enable register:
Bit(s)  Description     (Table 01198)
 7-4    reserved
 3      Write to APMC Port
 2      SRBTN#
 1      BATLOW#
 0      reserved
Note:   Enables SMI# generation for the above hardware events
SeeAlso: #01168,#01199,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Miscellaneous SMI Status register:
Bit(s)  Description     (Table 01199)
 7-4    reserved
 3      =1 indicates system is in global standby mode
 2      SRBTN# caused SMI
 1      BATLOW# caused SMI
 0      reserved
SeeAlso: #01168,#01198,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Global SMI Enable register:
Bit(s)  Description     (Table 01200)
 7      System Events Enabled
 6      Software SMI#'s (generated by bit 0 of this register) Enabled
 5      reserved
 4      Local Traps Enabled
 3      Local Standby Timers Enabled
 2      Global Standby Timer Enabled
 1      SRBTN# and BATLOW# Enabled
Note:   Enables SMI# generation for the above hardware events
SeeAlso: #01168,#01201,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Global SMI Status register:
Bit(s)  Description     (Table 01201)
 7      One of the System Events caused SMI
 6      Software SMI or EXTSMI# caused SMI
 5      Write to APMC caused SMI
 4      Access to one of the Local Traps caused SMI
 3      One of the local Standby timers caused SMI
 2      Global Standby Timer caused SMI
 1      SRBTN# or BATLOW# caused SMI
 0      reserved
SeeAlso: #01168,#01200,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Suspend/Resume Control 1 register:
Bit(s)  Description     (Table 01202)
 7      BATLOW# bypasses Suspend delay timer and activates SMI# immediately
 6      IRQ8 will NOT cause a resume
 5      COM RI (Ring) will NOT cause a resume ("Wake on Ring" function)
 4      BATLOW# will not prevent a resume
 3      is set by power management software at the end of a suspend routine
 2      can be set by power management software at the end of a suspend routine
 1-0    Set suspend mode
        00      Suspend Disabled
        01      reserved
        10      Suspend-to-DRAM
        11      Suspend-to-Disk
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Suspend/Resume Control 2 register:
Bit(s)  Description     (Table 01203)
 7-1    reserved
 0      EXTSMI# will NOT cause a resume event
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX SMOUT Control register:
Bit(s)  Description     (Table 01204)
 7-6    reserved
 5-0    Writing to any bits sets the state of the 6 SMOUTx pins.
        SMOUT5 is not effected if it is configured for DOE# function
        SMOUT4 is not effected if it is configured for RTCALE function
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Clock Control register:
Bit(s)  Description     (Table 01205)
 7      Clock Throttle standy by timer frequency
        =1 32ms
        =0 4ms
Note:   Sets the granularity of the Clock Throttle Standby Timer
 6-5    reserved
 4      Enable Auto Clock Throttle
 3-2    STPCLK# Mode
        00 Disable STPCLK# Function
        01 Enable stop grant mode
        10 Enable stop clock mode
        11 reserved
 1      Enable clock throttling
 0      Enable "PCI Clock can be stopped"
SeeAlso: #01168,PORT xxxxh"Intel 82371"

(Table 01206)
Values for Intel 82371MX Shadow Register
Value   AT Port Description
 00h    00h     Channel 0 Base Address Register (low byte)
 01h    00h     Channel 0 Base Address Register (high byte)
 02h    01h     Channel 0 Base Word Count Register (low byte)
 03h    01h     Channel 0 Base Word Count Register (high byte)
 04h    02h     Channel 1 Base Address Register (low byte)
 05h    02h     Channel 1 Base Address Register (high byte)
 06h    03h     Channel 1 Base Word Count Register (low byte)
 07h    03h     Channel 1 Base Word Count Register (high byte)
 08h    04h     Channel 2 Base Address Register (low byte)
 09h    04h     Channel 2 Base Address Register (high byte)
 0Ah    05h     Channel 2 Base Word Count Register (low byte)
 0Bh    05h     Channel 2 Base Word Count Register (high byte)
 0Ch    06h     Channel 3 Base Address Register (low byte)
 0Dh    06h     Channel 3 Base Address Register (high byte)
 0Eh    07h     Channel 3 Base Word Count Register (low byte)
 0Fh    07h     Channel 3 Base Word Count Register (high byte)
 10h    08h     DMA1 Command Register
 11h    0Bh     Channel 0 Mode Register
 12h    0Bh     Channel 1 Mode Register
 13h    0Bh     Channel 2 Mode Register
 14h    0Bh     Channel 3 Mode Register
 15h    0Fh     DMA1 Mask Register
 16h    C4h     Channel 5 Base Address Register (low byte)
 17h    C4h     Channel 5 Base Address Register (high byte)
 18h    C6h     Channel 5 Base Word Count Register (low byte)
 19h    C6h     Channel 5 Base Word Count Register (high byte)
 1Ah    C8h     Channel 6 Base Address Register (low byte)
 1Bh    C8h     Channel 6 Base Address Register (high byte)
 1Ch    CAh     Channel 6 Base Word Count Register (low byte)
 1Dh    CAh     Channel 6 Base Word Count Register (high byte)
 1Eh    CCh     Channel 7 Base Address Register (low byte)
 1Fh    CCh     Channel 7 Base Address Register (high byte)
 20h    CDh     Channel 7 Base Word Count Register (low byte)
 21h    CDh     Channel 7 Base Word Count Register (high byte)
 22h    D0h     DMA2 Command Register
 23h    D6h     Channel 5 Mode Register
 24h    D6h     Channel 6 Mode Register
 25h    D6h     Channel 7 Mode Register
 26h    DEh     DMA2 Mask Register
 27h    20h     PIC1 ICW1
 28h    21h     PIC1 ICW2
 29h    21h     PIC1 ICW3
 2Ah    21h     PIC1 ICW4
 2Bh    20h     PIC1 OCW2
 2Ch    A0h     PIC2 ICW1
 2Dh    A1h     PIC2 ICW2
 2Eh    A1h     PIC2 ICW3
 2Fh    A1h     PIC2 ICW4
 30h    A0h     PIC2 OCW2
 31h    70h     NMI mask / RTC address
 32h    03FAh   COM1 FIFO Enable Register (only bits 0,3,6 & 7 valid)
 33h    02FAh   COM2 FIFO Enable Register (only bits 0,3,6 & 7 valid)
 34h    03EAh   COM3 FIFO Enable Register (only bits 0,3,6 & 7 valid)
 35h    02EAh   COM4 FIFO Enable Register (only bits 0,3,6 & 7 valid)
 36h    40h     TIMER 0 Count Register (low byte)
 37h    40h     TIMER 0 Count Register (high byte)
 38h    20h     Master PIC OCW3 Register (bits 0,2 & 5 only valid)
 39h    A0h     Slave PIC OCW3 Register (bits 0,2 & 5 only valid)
Desc:   This register is used to read the current programmed value of certain
          AT compatable I/O ports which are traditionally write-only.
Note:   To read a given register, write the value from the table to the shadow
          register, then immediately re-read the shadow register. The returned
          value is the current value of the I/O port.
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Burst Clock/Clock Throttle Break Enable 0 register:
Bit(s)  Description     (Table 01207)
 7      Enable IRQ7
 6      Enable IRQ6
 5      Enable IRQ7
 4      Enable IRQ4
 3      Enable IRQ3
 2      reserved
 1      Enable IRQ1
 0      Enable IRQ0
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Event Enable 1 register:
Bit(s)  Description     (Table 01208)
 7      Enable IRQ15
 6      Enable IRQ14
 5      reserved
 4      Enable IRQ12
 3      Enable IRQ11
 2      Enable IRQ10
 1      Enable IRQ9
 0      Enable IRQ8
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Event Enable 2 register:
Bit(s)  Description     (Table 01209)
 7      (Clock Throttle Break Event,Burst Clock Event)
          reserved
        (System Event,Stop Break Event,Clock Throttle Break Event)
          Enable BATLOW# & SRBTN#
 6      Enable EXTSMI#
 5      Enable SMI#
 4      (System Event,Stop Break Event,Clock Throttle Break Event)
          Enable NMI
        (Burst Clock Event)
          reserved
 3      (System Event,Stop Break Event,Clock Throttle Break Event)
          Enable INTR
        (Burst Clock Event)
          reserved
 2      reserved
 1      Enable COMRI#
 0      Enable events of selected type
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Event Enable 3 register:
Bit(s)  Description     (Table 01210)
 7-2    reserved
 1      Enable EXTEVNT#
 0      Enable PHLDA#
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Event Enable 4 register:
Bit(s)  Description     (Table 01211)
 7      Enable PMAC1
 6      Enable PMAC0
 5      Enable PAC5
 4      Enable PAC4
 3      Enable PAC3
 2      Enable PAC2
 1      Enable PAC1
 0      Enable PCSC
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Event Enable 5 register:
Bit(s)  Description     (Table 01212)
 7      Enable COM4
 6      Enable COM3
 5      Enable COM3
 4      Enable COM1
 3      Enable Secondary FDC
 2      Enable Primary FDC
 1      Enable Secondary IDE
 0      Enable Promary IDE
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Bitfields for Intel 82371MX Event Enable 6 register:
Bit(s)  Description     (Table 01213)
 7      Enable Audio-E
 6      Enable Audio-D
 5      Enable Audio-C
 4      Enable Audio-B
 3      Enable Audio-A
 2      Enable Parallel 3
 1      Enable Parallel 2
 0      Enable Parallel 1
SeeAlso: #01168,PORT xxxxh"Intel 82371"

Format of PCI Configuration for Intel 82371FB/82371SB Function 1 (IDE):
Offset  Size    Description     (Table 01214)
 00h 64 BYTEs   header (see #00878)
                (vender ID 8086h, device ID 1230h/7010h)
 20h    DWORD   Bus Master Interface Base Address
                (see PORT xxxxh"Intel 82371SB")
 40h    WORD    IDE timing modes, primary channel (see #01223)
 42h    WORD    IDE timing modes, secondary channel (see #01223)
 44h    BYTE    (82371SB) slave IDE timing register (see #01224)
 45h 187 BYTEs  reserved
SeeAlso: #01167,#01215,PORT xxxxh"Intel 82371SB"

Format of PCI Configuration data for Intel 82371SB Function 2 (USB):
Offset  Size    Description     (Table 01215)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 7020h)
 20h    DWORD   I/O space base address
                (see PORT xxxxh"Intel 82371SB")
 40h 32 BYTEs   reserved
 60h    BYTE    Serial Bus Specification release number
                00h pre-release 1.0
                10h Release 1.0
 61h  9 BYTEs   reserved
 6Ah    WORD    miscellaneous status (see #01225)
 6Ch 84 BYTEs   reserved
 C0h    WORD    legacy support (see #01226)
 C2h 62 BYTEs   reserved
SeeAlso: #01167,#01214,PORT xxxxh"Intel 82371SB"

Bitfields for Intel 82371FB/82371SB top of memory register:
Bit(s)  Description     (Table 01216)
 7-4    top of ISA memory (in megabytes, less 1; i.e. 0001 = 2M)
 3      ISA/DMA lower BIOS forwarding enable
 2      (82371SB) enable A000/B000 segment forwarding to PCI bus
 1      enable forwarding ISA/DMA 512K-640K region to PCI bus
 0      reserved
SeeAlso: #01167,#01217

Bitfields for Intel 82371FB/82371SB miscellaneous status register:
Bit(s)  Description     (Table 01217)
 15     (82371SB) enable SERR# on delayed transaction
        write 1 to clear this bit
 14-8   reserved
 7      (82371SB) NB Retry Enable
 6      (82371SB) EXTSMI# Mode Enable
        allow special SERR# protocol between PCI bridge and 82371
 5      reserved
 4      (82371SB) enable USB
        disable USB's master enable and I/O decode enable prior to
         clearing this bit!
 3      reserved
 2      (82371FB) PCI Header Type Bit enable
        =1 report multifunction device in PCI configuration header
 1      (82371FB) internal ISA DMA/external DMA Mode status (read-only)
        =0 normal DMA operation
 0      (82371FB) ISA Clock Divisor status (read-only)
        (82371SB) ISA Clock Divisor (read-write)
        =1 SYSCLK clock divisor is 3
        =0 SYSCLK clock divisor is 4
SeeAlso: #01167,#01216

Bitfields for Intel 82371FB/82371SB/82371MX motherboard IRQ Route Control:
Bit(s)  Description     (Table 01218)
 7      disable IRQ routing
 6      enable MIRQx/IRQx sharing
 5      (82371SB only) enable IRQ0 output
 4      reserved (0)
 3-0    ISA IRQ number to which to route the PCI IRQ
Notes:  IRQs 0-2, 8, and 13 are reserved
        interrupt sharing should only be enabled when the device connected to
          the MIRQ line and the device connected to the IRQ line both produce
          active high, level triggered interrupts.
SeeAlso: #01167,#01168,#01216,#01219

Bitfields for Intel 82371FB/82371SB/82371MX motherboard DMA control:
Bit(s)  Description     (Table 01219)
 7      type F DMA buffer enable
 6-4    reserved
 3      (82371FB only) disable motherboadr DMA channel
        (SB/MX) reserved (0)
 2-0    DMA channel number (100 = disabled [default])
        (82371FB) Type F and Motherboard DMA
        (82371SB/MX) Type F DMA
SeeAlso: #01167,#01168,#01218

Bitfields for Intel 82371FB/83271SB programmable chip select control register:
Bit(s)  Description     (Table 01220)
 15-2   I/O address which will assert PCS# signal
 1-0    PCS address mask
        00 four bytes
        01 eight contiguous bytes
        10 disabled
        11 sixteen contiguous bytes
SeeAlso: #01167,#01219,#01221

Bitfields for Intel 82371SB Deterministic Latency Control register:
Bit(s)  Description     (Table 01221)
 7-4    reserved
 3      enable SERR# on delayed transaction timeout
 2      enable USB passive release
 1      enable passive release
 0      enable delayed transactions
SeeAlso: #01167,#01220

Bitfields for Intel 82371FB/82371SB SMI Control Register:
Bit(s)  Description     (Table 01222)
 7-5    reserved
 4-3    Fast-Off Timer freeze/granularity selection
        00 one minute granularity (assuming 33 MHz PCICLK)
        01 disabled (frozen)
        10 one PCICLK
        11 one millisecond
 2      STPCLK# scaling enable
        =1 enable Clock Scale bytes in PCI configuration space
 1      STPCLK# signal enable
        =1 assert STPCLK# on read from PORT 00B2h
 0      SMI# Gate
        =1 enable SMI# on system management interrupt
Notes:  bit 1 is cleared either with an explicit write of 0 here, or by any
          write to PORT 00B2h
        bit 0 does not affect the recording of SMI events, so a pending SMI
          will cause an immediate SMI# when the bit is set
SeeAlso: #01167,#01079

Bitfields for Intel 82371FB/82371SB/82371MX IDE timing modes:
Bit(s)  Description     (Table 01223)
 15     IDE decode enable
 14     (82371SB) slave IDE timing register enable (see #01224)
        (82371MX) primary/secondary address decode (=0 primary, =1 secondary)
 13-12  IORDY# sample point
        00 five clocks after DIOx# assertion
        01 four clocks
        10 three clocks
        11 two clocks
 11-10  reserved
 9-8    recovery time between IORDY# sample point and DIOx#
        00 four clocks
        01 three clocks
        10 two clocks
        11 one clock
 7      (FB/SB) DMA timing enable only, drive 1
        (MX) reserved
 6      prefetch and posting enable, drive 1
 5      IORDY# sample point enable drive select 1
 4      fast timing bank drive select 1
 3      (FB/SB) DMA timing enable only, drive 0
        (MX) reserved
 2      prefetch and posting enable, drive 0
 1      IORDY# sample point enable drive select 0
 0      fast timing bank drive select 0
SeeAlso: #01214,#01168

Bitfields for Intel 82371SB slave IDE timing register:
Bit(s)  Description     (Table 01224)
 7-6    secondary drive 1 IORDY# sample point
        00 five clocks after DIOx# assertion
        01 four clocks
        10 three clocks
        11 two clocks
 5-4    secondary drive 1 recovery time
        00 four clocks
        01 three clocks
        10 two clocks
        11 one clock
 3-2    primary drive 1 IORDY# sample point
 1-0    primary drive 1 recovery time
SeeAlso: #01223

Bitfields for Intel 82371SB miscellaneous status:
Bit(s)  Description     (Table 01225)
 15-1   reserved
 0      USB clock selection
        =1 48 MHz
        =0 24 MHz
SeeAlso: #01215,#01226

Bitfields for Intel 82371SB legacy support register:
Bit(s)  Description     (Table 01226)
 15     A20GATE pass-through sequence ended
        write 1 to clear this bit
 14     reserved
 13     USB PIRQ enabled
 12     USR IRQ status (read-only)
 11     trap caused by write to PORT 0064h
        write 1 to clear this bit
 10     trap caused by read from PORT 0064h
        write 1 to clear this bit
 9      trap caused by write to PORT 0060h
        write 1 to clear this bit
 8      trap caused by read from PORT 0060h
        write 1 to clear this bit
 7      enable SMI at end of A20GATE Pass-Through
 6      A20GATE pass-through sequence in progress (read-only)
 5      enable A20GATE pass-through sequence
        (write PORT 64h,D1h; write 60h,xxh; read 64h; write 64h,FFh)
 4      enable trap/SMI on USB IRQ
 3      enable trap/SMI on PORT 0064h write
 2      enable trap/SMI on PORT 0064h read
 1      enable trap/SMI on PORT 0060h write
 0      enable trap/SMI on PORT 0060h read
SeeAlso: #01215,#01225

Format of PCI Configuration Data for Intel 82557:
Offset  Size    Description     (Table 01227)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 1229h) (see #00873)
 10h    DWORD   base address of memory-mapped Control/Status Registers (4K)
                (see #01228)
 14h    DWORD   base address of I/O-mapped Control/Status Registers (32 ports)
 18h    DWORD   base address of Flash memory (1M)
 40h 192 BYTEs  unused
SeeAlso: #01098

Format of Intel 82557 Control/Status Registers:
Offset  Size    Description     (Table 01228)
 00h    WORD    SCB status word
 02h    WORD    SCB command word
 04h    DWORD   SCB general pointer
 08h    DWORD   PORT
 0Ch    WORD    Flash control register
 0Eh    WORD    EEPROM control register
 10h    DWORD   MDI control register
 14h    DWORD   Early RCV Interrupt Rx byte count (RXBC) register
Note:   see www.intel.com/design/network/datashts/64434604.pdf for additional
          details
SeeAlso: #01228

Format of PCI Configuration Data for Intel 82441FX:
Offset  Size    Description     (Table 01229)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 1237h) (see #00873)
 40h 16 BYTEs   reserved
 50h    WORD    PMC Configuration (see #01230)
 52h    BYTE    deturbo counter control
                when deturbo mode is selected (see PORT 0CF9h), the chipset
                  places a hold on the memory bus for a fraction of the
                  time inversely proportional to the value in this register
                  (i.e. C0h = 1/4, 80h = 1/2, 40h = 3/4, 20h = 7/8, etc.)
 53h    BYTE    DBX buffer control (see #01231)
 54h    BYTE    auxiliary control (see #01232)
 55h    WORD    DRAM Row Type (see #01233)
 57h    BYTE    DRAM Control (see #01234)
 58h    BYTE    DRAM Timing (see #01235)
 59h  7 BYTEs   Programmable Attribute Map registers 0-6 (see #01118)
 60h  8 BYTEs   DRAM Row Buondary registers 0-7
                each register N indicates cumulative amount of memory in rows
                  0-N (each 64 bits wide), in 8M units
 68h    BYTE    Fixed DRAM Hole Control
 69h  7 BYTEs   reserved
 70h    BYTE    Multi-Transaction Timer
                number of PCLKs guaranteed to the current agent before the
                  82441 will grant the bus to another PCI agent on request
 71h    BYTE    CPU Latency Timer (see #01236)
 72h    BYTE    System Management RAM control (see #01123)
 73h 29 BYTEs   reserved
 90h    BYTE    Error Command (see #01237)
 91h    BYTE    Error Status (see #01238)
 92h    BYTE    reserved
 93h    BYTE    Turbo Reset Control (see #01239)
 94h 108 BYTEs  reserved
SeeAlso: #01098,#01108

Bitfields for Intel 82441FX PMC Configuration Register:
Bit(s)  Description     (Table 01230)
 15     WSC Protocol Enable
 14     Row Select/Extra Copy select (read-only)
        =1 pins on PMC configured as two additional row selects (6/7)
        =0 extra copy of two lowest memory address bits enabled
 13-10  reserved
 9-8    host frequence select
        00 reserved
        01 60 MHz
        10 66 MHz
        11 reserved
 7      reserved
 6      ECC/Parity TEST enable
 5-4    DRAM Data Integrity Mode
        00 no parity/ECC
        01 parity generated and checked
        10 ECC generated and checked, correction disabled
        10 ECC generated and checked, correction enabled
 3      reserved
 2      In-Order Queue size (0=one, 1=four)
 1-0    reserved
SeeAlso: #01229,#01231

Bitfields for Intel 82441FX DBX buffer control register:
Bit(s)  Description     (Table 01231)
 7      enable delayed transactions
 6      enable CPU-to-PCI IDE posting
 5      enable USWC Write Post during I/O Bridge access
 4      disable PCI Delayed Transaction timer
 3      enable CPU-to-PCI Write Post
 2      enable PCI-to-DRAM pipeline
 1      enable PCI Burst Write Combining
 0      enable Read-Around-Write
SeeAlso: #01229,#01230

Bitfields for Intel 82441FX auxiliary control register:
Bit(s)  Description     (Table 01232)
 7      enable RAS precharge
 6-2    reserved
 1      Lower Memory Address Buffer Set A
        =0 8mA
        =1 12mA
 0      reserved
SeeAlso: #01229

Bitfields for Intel 82441FX DRAM Row Type register:
Bit(s)  Description     (Table 01233)
 15-14  row 7 DRAM type
 13-12  row 6 DRAM type
 11-10  row 5 DRAM type
 9-8    row 4 DRAM type
 7-6    row 3 DRAM type
 5-4    row 2 DRAM type
 3-2    row 1 DRAM type
 1-0    row 0 DRAM type
        00 fast page-mode DRAM
        01 EDO DRAM
        10 BEDO DRAM
        11 empty row
SeeAlso: #01229,#01234

Bitfields for Intel 82441FX DRAM Control register:
Bit(s)  Description     (Table 01234)
 7      reserved
 6      enable DRAM Refresh Queue
 5      enable DRAM EDO Auto-Detect Mode
 4      DRAM Refresh Type
        =0 CAS before RAS
        =1 RAS only
 3      reserved
 2-0    DRAM refresh rate
        000 disabled
        001 normal (as set by PMCCFG register)
        01x reserved
        1xx reserved
        111 fast refresh (every 32 host clocks)
SeeAlso: #01229,#01233,#01235

Bitfields for Intel 82441FX DRAM Timing register:
Bit(s)  Description     (Table 01235)
 7      reserved
 6      enable WCBR Mode
 5-4    DRAM Read Burst Timing
                BEDO    EDO     FPM
        00      x333    x444    x444
        01      x222    x333    x444
        10      x222    x222    x333
        11      res.    res.    res.
 3-2    DRAM Write Burst Timing
                (B)EDO  FPM
        00      x444    x444
        01      x333    x444
        10      x333    x333
        11      x222    x333
 1      RAS-to-CAS delay
        =1 one clock
        =0 zero clocks
 0      insert one MA Wait State
SeeAlso: #01229,#01234

Bitfields for Intel 82441FX CPU Latency Timer register:
Bit(s)  Description     (Table 01236)
 7-5    reserved
 4-0    snoop stall count value
SeeAlso: #01229

Bitfields for Intel 82441FX Error Command register:
Bit(s)  Description     (Table 01237)
 7-5    reserved
 4      enable SERR# on receiving Target Abort
 3      enable SERR# on PCI Parity Error (PERR#)
 2      reserved
 1      enable SERR# on receiving multiple-bit ECC/Parity error
 0      enable SERR# on receiving single-bit ECC error
SeeAlso: #01229,#01238

Bitfields for Intel 82441FX Error Status register:
Bit(s)  Description     (Table 01238)
 7-5    DRAM row causing first multi-bit error (read-only)
 4      multiple-bit uncorrectable error detected
        write 1 to this bit to clear it
 3-1    DRAM row causing first single-bit error (read-only)
 0      single-bit correctable ECC error detected
        write 1 to this bit to clear it
SeeAlso: #01229,#01237

Bitfields for Intel 82441FX,82443EX/LX Turbo Reset Control register:
Bit(s)  Description     (Table 01239)
 7-4    reserved
 3      enable BIST on hard reset
 2      reset CPU
 1      reset mode (0 = soft reset, 1 = hard reset)
 0      deturbo mode (82441FX)
        reserved (82443EX/LX)
Note:   BIST should not be enabled during a soft reset
SeeAlso: #01229,#01129,PORT 0CF9h

Format of PCI Configuration data for Intel 82454KX/GX:
Offset  Size    Description     (Table 01240)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 8086h, device ID 84C4h)
!!!intel\29052301.pdf pg. 40
 40h    DWORD   top of system memory
 44h  4 BYTEs   reserved
 48h    BYTE    PCI decode mode
 49h    BYTE    bridge device number
 4Ah    BYTE    PCI bus number
 4Bh    BYTE    PCI subordinate bus number
 4Ch    BYTE    PB configuration
 4Dh  4 BYTEs   reserved
 51h    BYTE    deturbo counter control
 52h    BYTE    reserved
 53h    BYTE    CPU read/write control
 54h    WORD    PCI read/write control
 56h    BYTE    reserved
 57h    BYTE    SMM Enable
 58h    BYTE    video buffer area enable
 59h  7 BYTEs   Programmable Attribute Map registers 0-6 (see #01118)
 60h 16 BYTEs   reserved
 70h    BYTE    Error Command
 71h    BYTE    Error Status
 72h  6 BYTEs   reserved
 78h    WORD    memory gap range
 7Ah    WORD    memory gap upper address
 7Ch    DWORD   PCI frame buffer
 80h  8 BYTEs   reserved
 88h    DWORD   high memory gap start address
 8Ch    DWORD   high memory gap end address
 90h  8 BYTEs   reserved
 98h    DWORD   (GX only) I/O Space Range #1
 9Ch    BYTE    PCI reset
 9Dh  3 BYTEs   reserved
 A0h    DWORD   (GX only) I/O Space Range #2
 A4h    DWORD   I/O APIC range
 A8h  8 BYTEs   reserved
 B0h    WORD    configuration values driven on reset
 B2h  2 BYTEs   reserved
 B4h    WORD    captured system configuration values (read-only)
 B6h  2 BYTEs   reserved
 B8h    DWORD   SMM range
 BCh    BYTE    high BIOS register
 BDh  3 BYTEs   reserved
 C0h    DWORD   PB Extended Error Reporting Command
 C4h    DWORD   PB Extended Error Reporting Status
 C8h    DWORD   PB Retry Timers
 CCh 52 BYTEs   reserved
SeeAlso: #00878
--------X-1AB10ASF9004-----------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION DWORD (Adaptec devices)
        AX = B10Ah subfn 9004h
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh) (see #01241)
Return: CF clear if successful
            ECX = dword read
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B10Ah,AX=B10Ah/SF=8086h

Format of PCI Configuration Data for AIC-78xx PCI SCSI controllers:
Offset  Size    Description     (Table 01241)
 00h 64 BYTEs   header (see #00878)
                (vendor ID 9004h) (see #00875 for device ID)
 40h    WORD    device configuration register (DEVCONFIG) (see #01242)
SeeAlso: #00734,PORT xxxxh"Adaptec AIC-78xx"

Bitfields for AIC-78xx device configuration register (DEVCONFIG):
Bit(s)  Description     (Table 01242)
 15-11  reserved
 10     (AIC-787x+) multi-port mode (MPORTMODE)
 9      (AIC-787x+) external SRAM present? (RAMPSM)
 8      "VOLSENSE"
 7      SCB RAM select (SCBRAMSEL)
 6      "MRDCEN"
 5      (AIC-787x+) external SCB SRAM access time  (EXTSCBTIME)
 4      (AIC-787x+) external SCB SRAM parity enable (EXTSCBPEN)
 3      "BERREN"
 2      "DACEN"
 1      SCSI terminator power level (STPWLEVEL)
 0      (AIC-787x+) differential active negation enable (DIFACTNEGEN)
Note:   clearing bit 7 allows access to the external SCB SRAM
SeeAlso: #01241
--------X-1AB10B-----------------------------
INT 1A - PCI BIOS v2.0c+ - WRITE CONFIGURATION BYTE
        AX = B10Bh
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh)
        CL = byte to write
Return: CF clear if successful
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B108h,AX=B10Ch,AX=B10Dh,AX=B18Bh,INT 2F/AX=1684h/BX=304Ch
--------X-1AB10C-----------------------------
INT 1A - PCI BIOS v2.0c+ - WRITE CONFIGURATION WORD
        AX = B10Ch
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (multiple of 2 less than 0100h)
        CX = word to write
Return: CF clear if successful
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B109h,AX=B10Bh,AX=B10Dh,AX=B18Ch,INT 2F/AX=1684h/BX=304Ch
--------X-1AB10D-----------------------------
INT 1A - PCI BIOS v2.0c+ - WRITE CONFIGURATION DWORD
        AX = B10Dh
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (multiple of 4 less than 0100h)
        ECX = dword to write
Return: CF clear if successful
        CF set on error
        AH = status (00h,87h) (see #00729)
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        the meanings of BL and BH on entry were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B10Ah,AX=B10Bh,AX=B10Ch,AX=B18Dh,INT 2F/AX=1684h/BX=304Ch
--------X-1AB10EBX0000-----------------------
INT 1A - PCI BIOS v2.1+ - GET IRQ ROUTING INFORMATION
        AX = B10Eh
        BX = 0000h
        DS = segment/selector for PCI BIOS data
            (real mode: F000h; 16-bit PM: physical 000F0000h; 32-bit PM: as
            specified by BIOS32 services directory)
        ES:(E)DI -> IRQ routing table header (see #01259 at AX=B406h)
Return: CF clear if successful
            AH = 00h
            BX = bit map of IRQ channels permanently dedicated to PCI
            WORD ES:[DI] = size of returned data
        CF set on error
            AH = error code (59h) (see #01243)
            WORD ES:[DI] = required size of buffer
SeeAlso: AX=B10Fh,AX=B406h,INT 2F/AX=1684h/BX=304Ch
--------X-1AB10F-----------------------------
INT 1A - PCI BIOS v2.1+ - SET PCI IRQ
        AX = B10Fh
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        CH = number of IRQ to connect
        CL = number of interrupt pin (0Ah=INTA# to 0Dh=INTD#) to reprogram
        DS = segment/selector for PCI BIOS data
            (real mode: F000h; 16-bit PM: physical 000F0000h; 32-bit PM: as
            specified by BIOS32 services directory)
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = error code (59h) (see #01243)
Note:   assumes that the calling application has determined the IRQ routing
          topology (see AX=B10Eh), has ensured that the selected IRQ will not
          cause a conflict, and will update the interrupt line configuration
          register on all devices which currently use the IRQ line
SeeAlso: AX=B10Eh
--------X-1AB181-----------------------------
INT 1A - PCI BIOS v2.0c+ - INSTALLATION CHECK (32-bit)
        AX = B181h
Return: as for AX=B101h
SeeAlso: AX=B101h
--------X-1AB182-----------------------------
INT 1A - PCI BIOS v2.0c+ - FIND PCI DEVICE (32-bit)
        AX = B182h
        CX = device ID (see #00735,#00742,#00743,#00873,#00875)
        DX = vendor ID (see #00732 at AX=B102h)
        SI = device index (0-n)
Return: as for AX=B102h
SeeAlso: AX=B102h
--------X-1AB183-----------------------------
INT 1A - PCI BIOS v2.0c+ - FIND PCI CLASS CODE (32-bit)
        AX = B183h
        ECX = class code (bits 23-0)
        SI = device index (0-n)
Return: as for AX=B103h
SeeAlso: AX=B103h
--------X-1AB186-----------------------------
INT 1A - PCI BIOS v2.0c+ - PCI BUS-SPECIFIC OPERATIONS (32-bit)
        AX = B186h
        BH = bus number
        EDX = Special Cycle data
Return: as for AX=B106h
Note:   the meanings of BL and BH on return were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B106h
--------X-1AB188-----------------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION BYTE (32-bit)
        AX = B188h
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh)
Return: as for AX=B108h
Note:   the meanings of BL and BH on return were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B108h,AX=B189h,AX=B18Ah
--------X-1AB189-----------------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION WORD (32-bit)
        AX = B189h
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh)
Return: as for AX=B109h
Note:   the meanings of BL and BH on return were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B109h,AX=B188h,AX=B18Ah
--------X-1AB18A-----------------------------
INT 1A - PCI BIOS v2.0c+ - READ CONFIGURATION DWORD (32-bit)
        AX = B18Ah
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh)
Return: as for AX=B10Ah
Note:   the meanings of BL and BH on return were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B10Ah,AX=B188h,AX=B189h
--------X-1AB18B-----------------------------
INT 1A - PCI BIOS v2.0c+ - WRITE CONFIGURATION BYTE (32-bit)
        AX = B18Bh
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (0000h-00FFh)
        CL = byte to write
Return: as for AX=B10Bh
Note:   the meanings of BL and BH on return were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B10Bh,AX=B18Ch,AX=B18Dh
--------X-1AB18C-----------------------------
INT 1A - PCI BIOS v2.0c+ - WRITE CONFIGURATION WORD (32-bit)
        AX = B18Ch
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (multiple of 2 less than 0100h)
        CX = word to write
Return: as for AX=B10Ch
Note:   the meanings of BL and BH on return were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B10Ch,AX=B18Bh,AX=B18Dh
--------X-1AB18D-----------------------------
INT 1A - PCI BIOS v2.0c+ - WRITE CONFIGURATION DWORD (32-bit)
        AX = B18Dh
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        DI = register number (multiple of 4 less than 0100h)
        ECX = dword to write
Return: as for AX=B10Dh
Note:   the meanings of BL and BH on return were exchanged between the initial
          drafts of the specification and final implementation
SeeAlso: AX=B10Dh,AX=B18Bh,AX=B18Ch
--------X-1AB18EBX0000-----------------------
INT 1A - PCI BIOS v2.1+ - GET IRQ ROUTING INFORMATION (32-bit)
        AX = B18Eh
        BX = 0000h
        DS = segment/selector for PCI BIOS data
            (real mode: F000h; 16-bit PM: physical 000F0000h; 32-bit PM: as
            specified by BIOS32 services directory)
        ES:(E)DI -> IRQ routing table header (see #01259 at AX=B406h)
Return: CF clear if successful
            AH = 00h
            BX = bit map of IRQ channels permanently dedicated to PCI
            WORD ES:[DI] = size of returned data
        CF set on error
            AH = error code (59h) (see #01243)
            WORD ES:[DI] = required size of buffer
SeeAlso: AX=B10Fh,AX=B406h,INT 2F/AX=1684h/BX=304Ch
--------X-1AB18F-----------------------------
INT 1A - PCI BIOS v2.1+ - SET PCI IRQ (32-bit)
        AX = B18Fh
        BH = bus number
        BL = device/function number (bits 7-3 device, bits 2-0 function)
        CH = number of IRQ to connect
        CL = number of interrupt pin (0Ah=INTA# to 0Dh=INTD#) to reprogram
        DS = segment/selector for PCI BIOS data
            (real mode: F000h; 16-bit PM: physical 000F0000h; 32-bit PM: as
            specified by BIOS32 services directory)
Return: CF clear if successful
            AH = 00h
        CF set on error
            AH = error code (59h) (see #01243)
Note:   assumes that the calling application has determined the IRQ routing
          topology (see AX=B10Eh), has ensured that the selected IRQ will not
          cause a conflict, and will update the interrupt line configuration
          register on all devices which currently use the IRQ line
SeeAlso: AX=B10Eh
--------X-1AB2-------------------------------
INT 1A - Reserved For PCI
        AH = B2h
--------X-1AB3-------------------------------
INT 1A - Reserved For PCI
        AH = B3h
--------X-1AB400-----------------------------
INT 1A - Intel Plug-and-Play AUTO-CONFIGURATION - INSTALLATION CHECK
        AX = B400h
Return: CF clear if installed
        AX = 0000h if installed
            BH = ACFG major version (02h)
            BL = ACFG minor version (08h)
            CX = ??? (0002h)
            EDX = 47464341h ('GFCA', which is byte-swapped 'ACFG')
            SI = ??? (001Fh)
SeeAlso: AX=B401h,AX=B402h,AX=B403h,AX=B404h,AX=B405h,AX=B406h,AX=B407h
SeeAlso: @xxxxh:xxxxh"Plug-and-Play"

(Table 01243)
Values for Intel Plug-and-Play AUTO-CONFIGURATION error codes:
 0000h  successful
 0001h  specified action could not be completed
 0051h  ???
 0055h  unable to read/write configuration table from/to nonvolatile storage
 0056h  not a valid configuration table or wrong table version
 0059h  buffer too small
 0081h  unsupported function
 FFFFh  ???
SeeAlso: #F0081
--------X-1AB401-----------------------------
INT 1A - Intel Plug-and-Play AUTO-CONFIGURATION - GET DEFAULT CONFIG TABLE
        AX = B401h
Return: CF clear if successful
            AX = 0000h
            BX = maximum size of configuration table in bytes
            CX = required configuration buffer size
                (includes scratch space used by ACFG code)
            EDI = linear/physical address of ESCD table (see #01244)
        CF set on error
            AX = error code (see #01243)
SeeAlso: AX=B400h,AX=B402h,@xxxxh:xxxxh"Plug-and-Play"

Format of Intel Plug-and-Play Extended System Configuration Data table:
Offset  Size    Description     (Table 01244)
 00h    WORD    total length of this table
 02h  4 BYTEs   signature "ACFG"
 06h    BYTE    minor version number
 07h    BYTE    major version number (currently 02h)
 08h    BYTE    number of boards listed in the configuration data
 09h  3 BYTEs   reserved (00h)
 0Ch    var     board data
        WORD    checksum
Notes:  this table contains information about the standard devices in the
          system, such as serial ports, parallel ports, etc.  For each device,
          it includes at least the I/O port address (03F8h,02F8h,0378h,etc).
        the sum of all words in the table, including the checksum field (with
          implied zero padding if the length is odd), must equal 0000h
SeeAlso: #01245

Format of Extended System Configuration Data Board Header:
Offset  Size    Description     (Table 01245)
 00h    WORD    length of this header in bytes
 02h    BYTE    slot number
                00h motherboard
                01h-0Fh ISA/EISA
                10h-40h PCI
 03h    BYTE    reserved (00h)
SeeAlso: #01244,#01246

Format of Extended System Configuration Data Freeform Board Header:
Offset  Size    Description     (Table 01246)
 00h  4 BYTEs   signature "ACFG"
 04h    BYTE    minor version number
 05h    BYTE    major version number (currently 02h)
 06h    BYTE    board type
                01h ISA
                02h EISA
                04h PCI
                08h PCMCIA
                10h PnPISA
                20h MCA
 07h    BYTE    reserved (00h)
 08h    WORD    disabled functions (bit N set = function N disabled)
 0Ah    WORD    configuration error functions
 0Ch    WORD    reconfigurable functions (bit N set = function N reconfig'able)
 0Eh  2 BYTEs   reserved (00h)
SeeAlso: #01249,#01250

Format of Extended System Configuration Data Freeform PCI Device Data:
Offset  Size    Description     (Table 01247)
 00h    BYTE    PCI bus number
 01h    BYTE    PCI device and function number
 02h    WORD    PCI device identifier
 04h    WORD    PCI vendor ID (see #00732 at INT 1A/AX=B102h)
 06h  2 BYTEs   reserved (00h)
SeeAlso: #01247,#01250

Format of Extended System Configuration Data Freeform PnP ISA Board ID:
Offset  Size    Description     (Table 01248)
 00h    DWORD   vendor ID (EISA device identifier)
 04h    DWORD   serial number
SeeAlso: #01248,#01249

Format of Extended System Configuration Data PnP ISA ECD Extension Function:
Offset  Size    Description     (Table 01249)
 00h    WORD    001Eh (length of this structure)
 02h    BYTE    01h (selection size)
 03h    BYTE    00h (selection data)
 04h    BYTE    C0h (function information byte) (see #01252)
 05h    BYTE    18h (size of following free-format data)
 06h 16 BYTEs   freeform board header (see #01246)
 16h  8 BYTEs   Plug-and-Play board ID (see #01248)
Note:   ECD = Extended Configuration Data; this structure must be the last
          "function" for a particular ISA Plug-and-Play board
SeeAlso: #01250

Format of Extended System Configuration Data PCI ECD Extension Function:
Offset  Size    Description     (Table 01250)
 00h    WORD    length of this structure (at least 001Eh, up to 0056h)
 02h    BYTE    01h (selection size)
 03h    BYTE    00h (selection data)
 04h    BYTE    C0h (function information byte) (see #01252)
 05h    BYTE    size of following free-format data (at least 18h, max 50h)
 06h 16 BYTEs   freeform board header (see #01246)
 16h 8N BYTEs   PCI board ID (see #01247) for one to eight boards
Notes:  ECD = Extended Configuration Data; this structure must be the last
          "function" for a particular PCI board
        AMI BIOS v1.00.05.AX1 sets the length field to 001Ch for entries with
          a single board ID, apparently treating the field as the length of
          the remainder of the structure instead of the full structure's length
SeeAlso: #01249

Bitfields for EISA ID and Slot Information:
Bit(s)  Description     (Table 01251)
 3-0    selector among duplicate configuration file names (0000 if no dups)
 5-4    slot type
        00 expansion slot
        01 embedded
        10 virtual slot
        11 reserved
 6      ID is readable
 7      duplicate IDs present
 8      board can be disabled
 9      IOCHKERR supported
 10     board or entries locked
 13-11  reserved
 14     board does not have or need configuration file
 15     configuration not complete
SeeAlso: #01252

Bitfields for EISA Function Information:
Bit(s)  Description     (Table 01252)
 0      subtype data
 1      memory information (see #01253)
 2      IRQ information (see #01255)
 3      DMA information (see #01256)
 4      port range information (see #01257)
 5      port initialization data (see #01258)
 6      free form data
 7      function disabled
SeeAlso: #01249,#01250,#01251

Format of EISA Memory Information:
Offset  Size    Description     (Table 01253)
 00h    WORD    memory information flags (see #01254)
 02h  3 BYTEs   high 24 bits of memory start address (LSB first)
 05h    WORD    memory size in K (0000h = 65536K)
SeeAlso: #01252

Bitfields for EISA Memory Information Flags:
Bit(s)  Description     (Table 01254)
 0      writable (RAM rather than ROM)
 1      cached
 2      write-back cache rather than write-through
 4-3    memory type
        00 system
        01 expantion
        10 virtual
        11 other
 5      shared
 6      reserved (0)
 7      more entries follow
 9-8    memory width
        00 byte
        01 word
        10 dword
        11 reserved
 11-10  decoded address lines
        00 = 20
        01 = 24
        10 = 32
        11 reserved
 15-12  reserved (0)
SeeAlso: #01253

Bitfields for EISA IRQ Information:
Bit(s)  Description     (Table 01255)
 3-0    IRQ number
 4      reserved (0)
 5      IRQ triggering (0 = edge, 1 = level)
 6      IRQ is shareable
 7      more entries follow
 15-8   reserved (0)
SeeAlso: #01252

Bitfields for EISA DMA Information:
Bit(s)  Description     (Table 01256)
 2-0    DMA channel number
 5-3    reserved (0)
 6      shareable
 7      more entries follow
 9-8    reserved
 11-10  DMA transfer size
        00 byte
        01 word
        10 dword
        11 word, but count in bytes
 13-12  DMA timing
        00 ISA-compatible
        01 EISA type "A"
        10 EISA type "B"
        11 EISA type "C"/"F" (burst)
 15-14  reserved (0)
SeeAlso: #01252

Format of EISA Port Range Information:
Offset  Size    Description     (Table 01257)
 00h    BYTE    port description
                bits 4-0: number of sequential ports
                bit 5 reserved (0)
                bit 6: shareable
                bit 7: more entries follow
 01h    WORD    I/O port address
SeeAlso: #01252,#01258

Format of EISA Port Initialization Data:
Offset  Size    Description     (Table 01258)
 00h    BYTE    flags
                bits 1-0: port size
                        00 byte
                        01 word
                        10 dword
                        11 reserved
                bit 2: masked write
                bits 6-3 reserved (0)
                bit 7: more entries follow
 01h    ???
SeeAlso: #01252,#01257
--------X-1AB402-----------------------------
INT 1A - Intel Plug-and-Play AUTO-CONFIGURATION - COPY AND VERIFY CONFIG TABLE
        AX = B402h
        DS:SI -> configuration table (see #01244)
        ES:DI -> buffer for copy of configuration table
Return: CF clear if successful
            AX = 0000h
        CF set on error
            AX = error code (0055h,0056h) (see #01243)
Note:   the buffer pointed at by ES:DI must be at least as large as the
          maximum configuration table size reported by AX=B401h
SeeAlso: AX=B400h,AX=B401h,AX=B403h
--------X-1AB403-----------------------------
INT 1A - Intel Plug-and-Play AUTO-CONFIGURATION - STORE ESCD TABLE IN NVRAM
        AX = B403h
        DS:SI -> configuration table (see #01244)
Return: CF clear if successful
            AX = 0000h
        CF set on error
            AX = error code (0055h) (see #01243)
Note:   sets the configuration table's checksum field, then copies the table
          into nonvolatile storage (i.e. FlashROM)
SeeAlso: AX=B400h,AX=B402h
--------X-1AB404-----------------------------
INT 1A - Intel Plug-and-Play AUTO-CONFIGURATION - GET AVAILABLE IRQs???
        AX = B404h
        BX = bitmap of IRQs being used???
Return: CF clear if successful
            AX = 0000h
            BX = available for ISA??? (not(BXin) & A127h)
            CX = available for on-board I/O??? (not(BXin) & 40D8h)
            DX = available for PCI??? (either not(BXin) & 0E00h or 0000h)
        CF set on error
            AX = error code (0051h) (see #01243)
Note:   the various vector types have also been called "shareable",
          "unshareable", and "avoidable"
SeeAlso: AX=B400h,INT 2F/AX=1684h/BX=304Ch
--------X-1AB405-----------------------------
INT 1A - Intel Plug-and-Play AUTO-CONFIGURATION - GET ???
        AX = B405h
Return: AX = ??? (0008h)
SeeAlso: AX=B400h
--------X-1AB406-----------------------------
INT 1A - Intel Plug-and-Play AUTO-CONFIGURATION - GET PCI IRQ ROUTING TABLE
        AX = B406h
        ES:DI -> IRQ routing table header (see #01259)
Return: CF clear if successful
            AX = 0000h
            WORD ES:[DI] = size of returned data
        CF set on error
            AX = error code (0059h) (see #01243)
            WORD ES:[DI] = required size of buffer
SeeAlso: AX=B400h,AX=B404h,AX=B10Eh,INT 2F/AX=1684h/BX=304Ch

Format of Intel Plug-and-Play AUTO-CONFIGURATION PCI IRQ routing header:
Offset  Size    Description     (Table 01259)
 00h    WORD    length of IRQ routing table buffer
 02h    DWORD   -> IRQ routing table array buffer (see #01260)

Format of Intel Plug-and-Play ACFG PCI IRQ routing table entry [array]:
Offset  Size    Description     (Table 01260)
 00h    BYTE    PCI bus number
 01h    BYTE    PCI device number (bits 7-3)
 02h    BYTE    link value for INTA#
                (if non-zero, wire-ORed together with any other PCI interrupts
                  with same link value)
 03h    WORD    IRQ connectivity bit map for INTA#
                (standard AT IRQs to which PCI interrupt can be routed)
 05h    BYTE    link value for INTB#
 06h    WORD    IRQ connectivity bit map for INTB#
 08h    BYTE    link value for INTC#
 09h    WORD    IRQ connectivity bit map for INTC#
 0Bh    BYTE    link value for INTD#
 0Ch    WORD    IRQ connectivity bit map for INTD#
 0Eh    BYTE    (PCI BIOS v2.1+) device slot number (00h = motherboard)
 0Fh    BYTE    reserved
Note:   each item in the routing table corresponds to a motherboard PCI
          device or PCI slot
SeeAlso: #01259,#M0091
--------X-1AB407-----------------------------
INT 1A - Intel Plug-and-Play AUTO-CONFIGURATION - ???
        AX = B407h
        EDX = length of ???
        EDI = physical address of ???
Return: CF clear if successful
            AX = 0000h
            EDX = ???
            EDI = ???
        CF set on error
            AX = error code (FFFFh) (see #01243)
Notes:  returns error if EDI < 000C0000h or EDI+EDX > 00100000h
        seems to force EDI and EDX to align to 16K boundaries
SeeAlso: AX=B400h
--------X-1AB4-------------------------------
INT 1A - Intel Plug-and-Play AUTO-CONFIGURATION - 32-BIT API
        AH = B4h
        AL = function (80h-87h)
        further details not yet available
Note:   these functions are 32-bit versions of functions 00h-07h
--------c-1AC0-------------------------------
INT 1A U - Disk Spool II v2.07+ - ALTERNATE INSTALLATION CHECK
        AH = C0h
Return: (see AH=A0h)
Notes:  this call is identical to AH=A0h
        this function is also supported by Vertisoft's Emulaser utility ELSPL,
          as that is a licensed version of Disk Spool II
SeeAlso: AH=A0h,AH=ABh,AH=D0h
--------U-1ACCCCBXCCCC-----------------------
INT 1A U - DATEFIX - INSTALLATION CHECK
        AX = CCCCh
        BX = CCCCh
        CX = 0000h
Return: CX = CCCCh if installed
            ES:BX -> original interrupt handler
Program: DATEFIX is a public-domain TSR to correct the date on AT&T 6300
          machines, where the realtime clock's calendar wraps after 1991
SeeAlso: AH=FEh,AH=FFh"AT&T"
--------c-1AD0-------------------------------
INT 1A U - Disk Spool II v2.07+ - FUNCTION CALLS
        AH = D0h
        AL = function code
            01h enable spooler and despooler
            02h enable spooler only
            03h enable despooler at beginning of file
            04h disable the despooler
            05h disable the despooler and spooler
            06h clear the spool file
            08h inhibit the popup menu
            09h enable the popup menu
            0Ah ??? (called by Disk Spool's INT 21 handler)
            0Bh disable the spooler
            0Ch start despooler after last successfully printed document
            0Dh start despooler at the exact point where it last left off
            0Eh pop up the menu
            0Fh ???
            11h start new spool file??? (called by Disk Spool's INT 21 handler
                        when a program terminates)
            14h ???
            15h delete despool file and reset ???
            16h ??? (writes something to unknown file)
            17h ??? (writes something to despool file, then reads something
                        else and ???)
            18h ??? (reads something from despool file, and then ???)
            19h ??? (creates/truncates spool file)
            20h clear file pointed to by the despooler
            21h ??? (writes something to unknown file)
            22h ??? (writes something to spool file if spooler/despooler using
                        same file)
            23h ??? (opens/creates unknown file, then ???)
            30h ???
            31h ???
            32h beep
            33h append CRLF to spool file???
            34h ???
            35h ???
            36h ???
            37h append CRLF to spool file and start a new spool file???
            38h ???
            40h ??? (v4.05)
            41h ??? (v4.05)
            51h ??? (called by Disk Spool's INT 21 handler)
            52h ??? (called by Disk Spool's INT 21 handler)
            57h ???
            5Ah ??? (v4.05)
            5Bh ??? (v4.05)
            5Ch ??? (v4.05)
Note:   this function is also supported by Vertisoft's Emulaser utility ELSPL,
          as that is a licensed version of Disk Spool II
SeeAlso: AH=A0h,AH=ADh
--------c-1AE0-------------------------------
INT 1A - Disk Spool II v4.0x - ENABLE/DISABLE
        AH = E0h
        AL = subfunction
            01h enable spooler
            02h disable spooler
            03h enable despooler
            04h disable despooler
        CL = printer port (01h COM1, 02h COM2, 05h LPT1, 06h LPT2)
Return: AH = status
            00h successful
            F0h printer port not managed by Disk Spool II
            FFH failed
Note:   this function is also supported by Vertisoft's Emulaser utility ELSPL,
          as that is a licensed version of Disk Spool II
SeeAlso: AH=A0h,AH=E1h,AX=E301h,AX=E401h
--------c-1AE1-------------------------------
INT 1A - Disk Spool II v4.0x - GET STATUS
        AH = E1h
        CL = printer port (01h COM1, 02h COM2, 05h LPT1, 06h LPT2)
Return: AH = status
            00h successful
                CL = despooler state (00h disabled, 41h enabled)
                CH = spooler state (00h disabled, 41h enabled)
                DL = despooler activity (00h standing by, 41h printing)
                ES:BX -> ASCIZ name of current spool file (or next if AutoSpool
                        or AutoDespool enabled)
                ES:SI -> ASCIZ name of current despool file
                ES:DI -> 3-byte file extension used by Disk Spool II
            F0h printer port not managed by Disk Spool II
Note:   this function is also supported by Vertisoft's Emulaser utility ELSPL,
          as that is a licensed version of Disk Spool II
SeeAlso: AH=A0h,AH=E0h,AH=E2h
--------U-1AE11B-----------------------------
INT 1A - TheGrab v4.60 - ???
        AX = E11Bh
        ???
Return: ??? (may destroy all registers)
SeeAlso: AX=E11Dh
--------U-1AE11D-----------------------------
INT 1A - TheGrab v4.60 - INSTALLATION CHECK
        AX = E11Dh
Return: ES:DI -> signature block (see #01261) if installed
            CX = length of signature block (000Fh)
Program: TheGrab is a resident ANSI screen grabber bundled with TheDraw
SeeAlso: AX=E11Bh

Format of TheGrab signature block:
Offset  Size    Description     (Table 01261)
 00h    BYTE    08h
 01h  8 BYTEs   ASCIZ "THEGRAB"
 09h  6 BYTEs   ??? (zeros)
--------c-1AE2-------------------------------
INT 1A - Disk Spool II v4.0x - GET SPOOL FILES
        AH = E2h
        AL = which
            01h first
            02h next (can only call after "first")
        CL = printer port (01h COM1, 02h COM2, 05h LPT1, 06h LPT2)
Return: AH = status
            00h successful
                ES:BX -> ASCIZ filename
            F0h no (more) spool files
            FFh failed
Note:   this function is also supported by Vertisoft's Emulaser utility ELSPL,
          as that is a licensed version of Disk Spool II
SeeAlso: AH=E0h,AH=E1h
--------c-1AE301-----------------------------
INT 1A - Disk Spool II v4.0x - GET SPOOL FILE STATUS
        AX = E301h
        ES:BX -> ASCIZ filename (max 32 chars)
Return: AH = status
            00h successful
                ES:SI -> spool file status record (see #01262)
            F0h not a spool file
            FFh failed
Note:   this function is also supported by Vertisoft's Emulaser utility ELSPL,
          as that is a licensed version of Disk Spool II
SeeAlso: AH=E0h,AX=E302h,AX=E401h

Format of Disk Spool II spool file status record:
Offset  Size    Description     (Table 01262)
 00h    BYTE    hour of creation or last update
 01h    BYTE    minute of creation or last update
 02h    BYTE    year-1980 of creation or last update
 03h    BYTE    month of creation or last update
 04h    BYTE    day of creation or last update
 05h    BYTE    total number of copies to print
 06h    BYTE    number of copies already printed
 07h    BYTE    printer port (01h COM1, 02h COM2, 05h LPT1, 06h LPT2)
 08h    BYTE    save status (00h delete after printing, 01h save)
 09h    BYTE    file status
                01h done printing, but being saved
                02h on hold
                03h queued for printing
                04h being spooled
                05h being despooled (i.e. printed)
 0Ah 16 BYTEs   ASCIZ description
 1Ah  2 WORDs   file size in bytes (high,low)
 1Eh  2 WORDs   bytes left to print (high,low)
--------c-1AE302-----------------------------
INT 1A - Disk Spool II v4.0x - UPDATE SPOOL FILE
        AX = E302h
        ES:BX -> ASCIZ filename (max 32 chars)
        ES:SI -> spool file status record (see #01262)
Return: AH = status
            00h successful
            F0h not a spool file
            FFh failed
Note:   this function is also supported by Vertisoft's Emulaser utility ELSPL,
          as that is a licensed version of Disk Spool II
SeeAlso: AH=E0h,AX=E301h,AX=E401h
--------c-1AE401-----------------------------
INT 1A - Disk Spool II v4.0x - SPOOL EXISTING FILE
        AX = E401h
        ES:BX -> ASCIZ filename (max 32 chars)
        CL = printer port (01h COM1, 02h COM2, 05h LPT1, 06h LPT2)
Return: AH = status
            00h successful
            FFh failed
Note:   this function is also supported by Vertisoft's Emulaser utility ELSPL,
          as that is a licensed version of Disk Spool II
SeeAlso: AH=E1h,AX=E302h,AX=E402h
--------c-1AE402-----------------------------
INT 1A U - Disk Spool II v4.0x - SPOOL EXISTING FILE???
        AX = E402h
        ES:BX -> ASCIZ filename (max 32 chars)
        CL = printer port (01h COM1, 02h COM2, 05h LPT1, 06h LPT2)
Return: AH = status
            00h successful
            FFh failed
Note:   this function is also supported by Vertisoft's Emulaser utility ELSPL,
          as that is a licensed version of Disk Spool II
SeeAlso: AH=E1h,AX=E302h,AX=E401h
--------c-1AE5-------------------------------
INT 1A U - Emulaser ELSPL.COM - ???
        AH = E5h
        ???
Return: ???
Program: ELSPL.COM is a licensed version of Disk Spool II which is distributed
          as part of Vertisoft's Emulaser PostScript emulator
SeeAlso: AH=A0h,INT 17/AH=03h
--------c-1AEE-------------------------------
INT 1A U - Disk Spool II v4.05 - ???
        AH = EEh
        AL = printer port???
        ???
Return: ???
Note:   this function is also supported by Vertisoft's Emulaser utility ELSPL,
          as that is a licensed version of Disk Spool II
SeeAlso: AH=E1h
--------U-1AF7-------------------------------
INT 1A - RighTime v1.1 - TEMPORARILY DISABLE
        AH = F7h
Program: RighTime is a TSR by G.T. Becker which continuously adjusts the
          system time to correct for clock drift
Note:   any AH value from F0h-F7h or F9h-FEh will perform this function in
          version 1.1, but F7h is the function called by transient portion
SeeAlso: AH=F8h,AH=FFh"RighTime"
--------U-1AF8-------------------------------
INT 1A - RighTime v1.1 - ENABLE
        AH = F8h
Program: RighTime is a TSR by G.T. Becker which continuously adjusts the
          system time to correct for clock drift
Note:   RighTime is TeSseRact-compatible (see INT 2F/AX=5453h) and modifies its
          TeSseRact program identifier based on its current state: "RighTime"
          when enabled, "RighTim"F7h when disabled.
SeeAlso: AH=F7h,AH=FFh"RighTime"
--------b-1AFE-------------------------------
INT 1A - AT&T 6300 - READ TIME AND DATE
        AH = FEh
Return: BX = day count (0 = Jan 1, 1984)
        CH = hour
        CL = minute
        DH = second
        DL = hundredths
SeeAlso: AX=CCCCh/BX=CCCCh,AH=FFh"AT&T",INT 21/AH=2Ah,INT 21/AH=2Ch
--------b-1AFF-------------------------------
INT 1A - AT&T 6300 - SET TIME AND DATE
        AH = FFh
        BX = day count (0 = Jan 1, 1984)
        CH = hour
        CL = minute
        DH = second
        DL = hundredths
Return: ???
SeeAlso: AX=CCCCh/BX=CCCCh,AH=FEh,INT 21/AH=2Bh"DATE",INT 21/AH=2Dh
--------U-1AFF-------------------------------
INT 1A - RighTime v1.1 - PERMANENTLY DISABLE
        AH = FFh
Program: RighTime is a TSR by G.T. Becker which continuously adjusts the
          system time to correct for clock drift
Note:   upon being permanently disabled, RighTime closes the file handle
          referencing its executable (which is updated with time correction
          information every two minutes while RighTime is enabled).
--------s-1AFF00-----------------------------
INT 1A - SND - INSTALLATION CHECK???
        AX = FF00h
Return: AL = version??? (02h)
        AH = busy flag (00h if not in a SND call, 01h if SND currently active)
Note:   the SND API is also supported by IC (Internal Commands) v2.0, a
          shareware TSR by Geoff Friesen which extends COMMAND.COM's internal
          command set
SeeAlso: AX=FF01h,AX=FF02h,AX=FF04h,AX=FF05h
--------s-1AFF01-----------------------------
INT 1A - SND - PAUSE
        AX = FF01h
        DX = number of clock ticks to delay
Return: AH = status
            00h successful
            01h SND busy
Notes:  if successful, execution returns to the caller after the delay expires;
          if SND is busy, execution returns immediately
        the IC v2.0 implementation of this API makes no special allowance for
          time rollover at midnight, which can cause the delay to be over one
          hour if this function is called just before the BIOS time count
          rolls over and the delay extends into the next day
SeeAlso: AX=FF00h,INT 15/AH=86h,INT 62/AX=0096h,INT 7F/AH=E8h,INT 80/BX=0009h
SeeAlso: INT E0/CL=BDh
--------s-1AFF02-----------------------------
INT 1A - SND - START SOUND
        AX = FF02h
        DX = frequency in Hertz (14h-FFFFh)
Return: AH = status
            00h successful
            01h SND busy
SeeAlso: AX=FF00h,AX=FF01h,AX=FF03h
--------s-1AFF03-----------------------------
INT 1A - SND - STOP SOUND
        AX = FF03h
Return: AH = status
            00h successful
            01h busy
Note:   turns off any sound currently being emitted by the PC's speaker unless
          SND is currently busy processing an API call (this includes
          background music).  Use AX=FF05h to stop the sound even if an API
          call is in progress.
SeeAlso: AX=FF00h,AX=FF02h,AX=FF05h
--------s-1AFF04-----------------------------
INT 1A - SND - PLAY MUSIC STRING IN BACKGROUND
        AX = FF04h
        DS:DX -> ASCIZ music string
Return: AH = status
            00h successful (music begins playing in background)
            01h busy
Note:   the music string accepted by SND is not the same as that accepted by
          BASIC and other programs which process music strings
SeeAlso: AX=FF00h,AX=FF05h,INT 80/BX=0006h
--------s-1AFF05-----------------------------
INT 1A - SND - UNCONDITIONALLY STOP SOUND
        AX = FF05h
Return: AH = 00h (successful)
Note:   this function is the same as AX=FF03h, but will stop the sound even if
          SND is currently busy, such as playing background music
SeeAlso: AX=FF00h,AX=FF03h,INT 80/BX=0007h
--------B-1B---------------------------------
INT 1B C - KEYBOARD - CONTROL-BREAK HANDLER
Desc:   this interrupt is automatically called when INT 09 determines that
          Control-Break has been pressed
Note:   normally points to a short routine in DOS which sets the Ctrl-C flag,
          thus invoking INT 23h the next time DOS checks for Ctrl-C.
SeeAlso: INT 23,MEM 0040h:0071h
--------B-1C---------------------------------
INT 1C - TIME - SYSTEM TIMER TICK
Desc:   this interrupt is automatically called on each clock tick by the INT 08
          handler
Notes:  this is the preferred interrupt to chain when a program needs to be
          invoked regularly
        not available on NEC 9800-series PCs
SeeAlso: INT 08,INT E2"PC Cluster"
--------B-1D---------------------------------
INT 1D - SYSTEM DATA - VIDEO PARAMETER TABLES
Note:   the default parameter table (see #01263) is located at F000h:F0A4h for
          100% compatible BIOSes
SeeAlso: INT 10/AH=00h

Format of video parameters:
Offset  Size    Description     (Table 01263)
 00h 16 BYTEs   6845 register values for modes 00h and 01h
 10h 16 BYTEs   6845 register values for modes 02h and 03h
 20h 16 BYTEs   6845 register values for modes 04h and 05h
 30h 16 BYTEs   6845 register values for modes 06h and 07h
 40h    WORD    bytes in video buffer for modes 00h and 01h (0800h)
 42h    WORD    bytes in video buffer for modes 02h and 03h (1000h)
 44h    WORD    bytes in video buffer for modes 04h and 05h (4000h)
 46h    WORD    bytes in video buffer for mode 06h (4000h)
 48h  8 BYTEs   columns on screen for each of modes 00h through 07h
 50h  8 BYTEs   CRT controller mode bytes for each of modes 00h through 07h
Note:   QEMM v7.5 Stealth appears to copy only the first 40h bytes of this
          table into always-accessible memory
--------B-1E---------------------------------
INT 1E - SYSTEM DATA - DISKETTE PARAMETERS
Notes:  the default parameter table (see #01264) is located at F000h:EFC7h for
          100% compatible BIOSes
        if the table is changed, INT 13/AH=00h should be called to ensure that
          the floppy-disk controller is appropriately reprogrammed
SeeAlso: INT 13/AH=0Fh,INT 41"HARD DISK 0",INT 4D/AH=0Ah

Format of diskette parameter table:
Offset  Size    Description     (Table 01264)
 00h    BYTE    first specify byte
                bits 7-4: step rate (Fh=2ms,Eh=4ms,Dh=6ms,etc.)
                bits 3-0: head unload time (0Fh = 240 ms)
 01h    BYTE    second specify byte
                bits 7-1: head load time (01h = 4 ms)
                bit    0: non-DMA mode (always 0)
 02h    BYTE    delay until motor turned off (in clock ticks)
 03h    BYTE    bytes per sector (00h = 128, 01h = 256, 02h = 512, 03h = 1024)
 04h    BYTE    sectors per track
 05h    BYTE    length of gap between sectors (2Ah for 5.25", 1Bh for 3.5")
 06h    BYTE    data length (ignored if bytes-per-sector field nonzero)
 07h    BYTE    gap length when formatting (50h for 5.25", 6Ch for 3.5")
 08h    BYTE    format filler byte (default F6h)
 09h    BYTE    head settle time in milliseconds
 0Ah    BYTE    motor start time in 1/8 seconds
---IBM SurePath BIOS---
 0Bh    BYTE    maximum track number
 0Ch    BYTE    data transfer rate
 0Dh    BYTE    drive type in CMOS
SeeAlso: #03226 at INT 4D/AH=09h
--------B-1F---------------------------------
INT 1F - SYSTEM DATA - 8x8 GRAPHICS FONT
Desc:   this vector points at 1024 bytes of graphics data, 8 bytes for each
          character 80h-FFh
Note:   graphics data for characters 00h-7Fh stored at F000h:FA6Eh in 100%
          compatible BIOSes
SeeAlso: INT 10/AX=5000h,INT 43
--------b-1F12-------------------------------
INT 1F U - C&T "SuperState" BIOS - POWER OFF
        AH = 12h
Return: none
Note:   POWER OFF
--------b-1F17-------------------------------
INT 1F U - C&T "SuperState" BIOS - EXECUTE FAR PROC ROUTINE ON SuperState
        AH = 17h
        ES:DI -> far procedure
Return: all registers except AH,ES,DI
Note:   You can change the BIOS area (F000h:0000h - F000h:FFFFh) only through
          this function
--------b-1F19-------------------------------
INT 1F U - C&T "SuperState" BIOS - ENABLE AUTO WAKEUP AND SET TIME AND DATE
        AH = 19h
        AL = hour in BCD
        BH = minutes in BCD
        BL = seconds in BCD
        CH = year century in BCD (must be 19h)
        CL = year low in BCD
        DH = month in BCD
        DL = date in BCD
Return: CF clear
--------b-1F1C-------------------------------
INT 1F U - C&T "SuperState" BIOS - SET SUSPEND TIMEOUT
        AH = 1Ch
        BX = sec until suspend starts
Return: None
--------b-1F1D-------------------------------
INT 1F U - C&T "SuperState" BIOS - SET SLEEP TIMEOUT
        AH = 1Dh
        BX = sec until sleep starts
Return: None
--------J-1F90-------------------------------
INT 1F - NEC PC-9801 - COPY EXTENDED MEMORY
        AH = 90h
        ES:BX -> global descriptor table (see #00499 at INT 15/AH=87h)
        CX = number of bytes to copy
        SI = 0000h
        DI = 0000h
Return: CF clear if successful
        CF set on error
        ???
SeeAlso: INT 15/AH=87h
--------b-1FF5--BLFA-------------------------
INT 1F U - C&T "SuperState" BIOS - REQUEST PASSWORD INPUT
        AH = F5h
        BL = FAh
Return: none
Note:   this function will not return until the correct password is entered
SeeAlso: AH=F5h/BL=FDh,AH=F5h/BL=FEh
--------b-1FF5--BLFD-------------------------
INT 1F U - C&T "SuperState" BIOS - ENCRYPT PASSWORD
        AH = F5h
        BL = FDh
        CX:SI = input string
        DX:DI = encrypted string
        BH = length of input string
Return: CF set on error
SeeAlso: AH=F5h/BL=FAh,AH=F5h/BL=FEh
--------b-1FF5--BLFE-------------------------
INT 1F U - C&T "SuperState" BIOS - SET PASSWORD
        AH = F5h
        BL = FEh
        CX:SI -> input string
        BH = length of input string (if BH = 00h, clear password)
Return: CF set on error
Note:   the input string must be encrypted by INT 1Fh/AH=F5h/BL=FDh
SeeAlso: AH=F5h/BL=FDh,AH=F5h/BL=FFh
--------b-1FF5--BLFF-------------------------
INT 1F U - C&T "SuperState" BIOS - GET ENCRYPTED PASSWORD
        AH = F5h
        BL = FFh
        DX:DI = string buffer
Return: CF set on error
        CF clear if successful
            BH = length of input string (if BH = 00h, password is not valid)
            DX:DI -> encrypted password string
SeeAlso: AH=F5h/BL=FDh,AH=F5h/BL=FEh
--------b-1FFB-------------------------------
INT 1F U - C&T "SuperState" BIOS - GET/SET CPU SPEED
        AH = FBh
        BL = function
            00h get CPU speed
                Return: AL = current CPU speed (00h = fast, 01h = slow)
            01h set CPU speed
                AL = new CPU speed (00h = fast, 01h = slow)
SeeAlso: AH=FCh/BL=00h
--------b-1FFC--BL00-------------------------
INT 1F U - C&T "SuperState" BIOS - GET ALARM STATUS
        AH = FCh
        BL = 00h
Return: AL = current alarm state (00h = disabled, 01h = enabled)
SeeAlso: AH=FCh/BL=01h,AH=FCh/BL=02h
--------b-1FFC--BL01-------------------------
INT 1F U - C&T "SuperState" BIOS - SET ALARM STATUS
        AH = FCh
        BL = 01h
        AL = new alarm state (00h = disabled, 01h = enabled)
SeeAlso: AH=FCh/BL=00h,AH=FCh/BL=03h
--------b-1FFC--BL02-------------------------
INT 1F U - C&T "SuperState" BIOS - GET ALARM TIME
        AH = FCh
        BL = 02h
Return: CH = hour by BCD
        CL = min by BCD
        DH = sec by BCD
SeeAlso: AH=FCh/BL=00h,AH=FCh/BL=03h,AH=FCh/BL=04h
--------b-1FFC--BL03-------------------------
INT 1F U - C&T "SuperState" BIOS - SET ALARM TIME
        AH = FCh
        BL = 03h
        CH = hour by BCD
        CL = min by BCD
        DH = sec by BCD
Return: CF set on error (incorrect time format or Alarm is not enable)
SeeAlso: AH=FCh/BL=01h,AH=FCh/BL=02h,AH=FCh/BL=05h
--------b-1FFC--BL04-------------------------
INT 1F U - C&T "SuperState" BIOS - GET ALARM DATE
        AH = FCh
        BL = 04h
Return: CH = year century by BCD
        CL = year low by BCD
        DH = month by BCD
        DL = date by BCD
SeeAlso: AH=FCh/BL=02h,AH=FCh/BL=05h
--------b-1FFC--BL05-------------------------
INT 1F U - C&T "SuperState" BIOS - SET ALARM DATE
        AH = FCh
        BL = 05h
        CH = year century by BCD
        CL = year low by BCD
        DH = month by BCD
        DL = date by BCD
Return: CF set on error (incorrect date format or Alarm is not enable)
SeeAlso: AH=FCh/BL=03h,AH=FCh/BL=04h
--------b-1FFD--BL00-------------------------
INT 1F U - C&T "SuperState" BIOS - GET AUTO WAKE UP STATUS
        AH = FDh
        BL = 00h
Return: AL = current wake-up state (00h = disabled, 01h = enabled)
SeeAlso: AH=FDh/BL=01h,AH=FDh/BL=02h
--------b-1FFD--BL01-------------------------
INT 1F U - C&T "SuperState" BIOS - SET AUTO WAKE UP STATUS
        AH = FDh
        BL = 01h
        AL = new wake-up state (00h = disabled, 01h = enabled)
SeeAlso: AH=FDh/BL=00h,AH=FDh/BL=03h
--------b-1FFD--BL02-------------------------
INT 1F U - C&T "SuperState" BIOS - GET AUTO WAKE UP TIME
        AH = FDh
        BL = 02h
Return: CH = hour by BCD
        CL = min by BCD
        DH = sec by BCD
SeeAlso: AH=FDh/BL=00h,AH=FDh/BL=03h
--------b-1FFD--BL03-------------------------
INT 1F U - C&T "SuperState" BIOS - SET AUTO WAKE UP TIME
       AH = FDh
       BL = 03h
       CH = hour by BCD
       CL = min by BCD
       DH = sec by BCD
Return: CF set on error (incorrect Time format or Auto Wake up is not enable)
SeeAlso: AH=FDh/BL=01h,AH=FDh/BL=02h
--------b-1FFD--BL04-------------------------
INT 1F U - C&T "SuperState" BIOS - GET AUTO WAKE UP DATE
        AH = FDh
        BL = 04h
Return: CH = year century in BCD
        CL = year low in BCD
        DH = month in BCD
        DL = date in BCD
SeeAlso: AH=FDh/BL=02h,AH=FDh/BL=05h
--------b-1FFD--BL05-------------------------
INT 1F U - C&T "SuperState" BIOS - SET AUTO WAKE UP DATE
        AH = FDh
        BL = 05h
        CH = year century in BCD
        CL = year low in BCD
        DH = month in BCD
        DL = date in BCD
Return: CF set on error (incorrect date format or Auto Wake up is not enable)
SeeAlso: AH=FDh/BL=03h"C&T",AH=FDh/BL=04h"C&T"
--------!---Section--------------------------
Interrupt List, part 6 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------O-20---------------------------------
INT 20 - Minix - SEND/RECEIVE MESSAGE
        AX = process ID of other process
        BX -> message
        CX = operation (1 send, 2 receive, 3 send&receive)
Program: Minix is a Version 7 Unix-compatible operating system by Andrew
          Tanenbaum
Note:   the message contains the system call number (numbered as in V7
          Unix(tm)) and the call parameters
--------D-20---------------------------------
INT 20 - DOS 1+ - TERMINATE PROGRAM
        CS = PSP segment
Return: never
Notes:  (see INT 21/AH=00h)
        this function sets the program's return code (ERRORLEVEL) to 00h
SeeAlso: INT 21/AH=00h,INT 21/AH=4Ch
--------G-20---------------------------------
INT 20 - COMTROL HOSTESS i/ISA DEBUGGER - INVOKE FIRMWARE DEBUGGER
        ???
Return: ???
SeeAlso: INT 21"COMTROL"
--------W-20----Vx0001-----------------------
INT 20 P - Microsoft Windows - VMM - VxD SERVICES
        VxD = 0001h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01265)
Values for VMM (VxD ID 0001h) service number:
 0000h  get version
 0001h  get current VM handle
 0002h  test current VM handle
 0003h  get system VM handle
 0004h  test system VM handle
 0005h  validate VM handle
 0006h  get VMM reenter count
 0007h  begin reentrant execution
 0008h  end reentrant execution
 0009h  install V86 breakpoint
 000Ah  remove V86 breakpoint
 000Bh  allocate V86 callback
 000Ch  allocation PM callback
 000Dh  call when VM returns
 000Eh  schedule global event
 000Fh  schedule VM event
 0010h  call global event
 0011h  call VM event
 0012h  cancel global event
 0013h  cancel VM event
 0014h  call priority VM event
 0015h  cancel priority VM event
 0016h  get NMI handler address
 0017h  set NMI handler address
 0018h  hook NMI event
 0019h  call when VM interrupts enabled
 001Ah  enable VM interrupts
 001Bh  disable VM interrupts
 001Ch  map flat
 001Dh  map linear to VM address
 001Eh  adjust execution priority
 001Fh  begin critical section
 0020h  end critical section
 0021h  end critical section and suspend
 0022h  claim critical section
 0023h  release critical section
 0024h  call when not critical
 0025h  create semaphore
 0026h  destroy semaphore
 0027h  wait on semaphore
 0028h  signal semaphore
 0029h  get critical section status
 002Ah  call when task switched
 002Bh  suspend VM
 002Ch  resume VM
 002Dh  no-fail resume VM
 002Eh  nuke VM
 002Fh  crash current VM
 0030h  get execution focus
 0031h  set execution focus
 0032h  get time slice priority
 0033h  set time slice priority
 0034h  get time slice granularity
 0035h  set time slice granularity
 0036h  get time slice information
 0037h  adjust execution time
 0038h  release time slice
 0039h  wake up VM
 003Ah  call when idle
 003Bh  get next VM handle
 003Ch  set global timeout
 003Dh  set VM timeout
 003Eh  cancel timeout
 003Fh  get system time
        Return: EAX = time in milliseconds that Windows has been running
 0040h  get VM execution time
 0041h  hook V86 interrupt chain
 0042h  get V86 interrupt vector
 0043h  set V86 interrupt vector
 0044h  get PM interrupt vector
 0045h  set PM interrupt vector
 0046h  simulate interrupt
 0047h  simulate IRET
 0048h  simulate far call
 0049h  simulate far jump
 004Ah  simulate far RET
 004Bh  simulate far RET N
 004Ch  build interrupt stack frame
 004Dh  simulate push
 004Eh  simulate pop
 004Fh  _HeapAllocate
 0050h  _HeapReAllocate
 0051h  _HeapFree
 0052h  _HeapGetSize
 0053h  _PageAllocate
 0054h  _PageReAllocate
 0055h  _PageFree
 0056h  _PageLock
 0057h  _PageUnLock
 0058h  _PageGetSizeAddr
 0059h  _PageGetAllocInfo
 005Ah  _GetFreePageCount
 005Bh  _GetSysPageCount
 005Ch  _GetVMPgCount
 005Dh  _MapIntoV86
 005Eh  _PhysIntoV86
 005Fh  _TestGlobalV86Mem
 0060h  _ModifyPageBits
 0061h  copy page table
 0062h  map linear into V86
 0063h  linear page lock
 0064h  linear page unlock
 0065h  _SetResetV86Pageabl
 0066h  _GetV86PageableArray
 0067h  _PageCheckLinRange
 0068h  page out dirty pages
 0069h  discard pages
 006Ah  _GetNulPageHandle
 006Bh  get first V86 page
 006Ch  map physical address to linear address
 006Dh  _GetAppFlatDSAlias
 006Eh  _SelectorMapFlat
 006Fh  _GetDemandPageInfo
 0070h  _GetSetPageOutCount
 0071h  hook V86 page
 0072h  assign device V86 pages
 0073h  deassign device V86 pages
 0074h  get array of V86 pages for device
 0075h  _SetNULPageAddr
 0076h  allocate GDT selector
 0077h  free GDT selector
 0078h  allocate LDT selector
 0079h  free LDT selector
 007Ah  _BuildDescriptorDWORDs
 007Bh  get descriptor
 007Ch  set descriptor
 007Dh  toggle HMA
 007Eh  get fault hook addresses
 007Fh  hook V86 fault
 0080h  hook PM fault
 0081h  hook VMM fault
 0082h  begin nested V86 execution
 0083h  begin nested execution
 0084h  execute V86-mode interrupt
 0085h  resume execution
 0086h  end nested execution
 0087h  allocate PM application callback area
 0088h  get current PM application callback area
 0089h  set V86 execution mode
 008Ah  set PM execution mode
 008Bh  begin using locked PM stack
 008Ch  end using locked PM stack
 008Dh  save client state
 008Eh  restore client state
 008Fh  execute VxD interrupt
        STACK:  WORD    interrupt number
                other registers as required by interrupt call
        Return: registers as returned by interrupt call
 0090h  hook device service
        EAX = service ID (high word = VxD ID, low = service number)
        ESI -> new handler
 0091h  hook device V86 API
 0092h  hook device PM API
 0093h  system control (see also #02657)
 0094h  simulate I/O
 0095h  install multiple I/O handlers
 0096h  install I/O handler
        DX = I/O port address
        ESI -> handler to call when I/O access attempted???
 0097h  enable global trapping
        DX = I/O port address
 0098h  enable local trapping
        DX = I/O port address
 0099h  disable global trapping
        DX = I/O port address
 009Ah  disable local trapping
        DX = I/O port address
 009Bh  create list
 009Ch  destroy list
 009Dh  allocate list
 009Eh  attach list
 009Fh  attach list tail
 00A0h  insert into list
 00A1h  remove from list
 00A2h  deallocate list
 00A3h  get first item in list
 00A4h  get next item in list
 00A5h  remove first item in list
 00A6h  add instance item
 00A7h  allocate device callback area
 00A8h  allocate global V86 data area
 00A9h  allocate temporary V86 data area
 00AAh  free temporary V86 data area
 00ABh  get decimal integer from profile
 00ACh  convert decimal string to integer
 00ADh  get fixed-point number from profile
 00AEh  convert fixed-point string
 00AFh  get hex integer from profile
 00B0h  convert hex string to integer
 00B1h  get boolean value from profile
 00B2h  convert boolean string
 00B3h  get string from profile
 00B4h  get next string from profile
 00B5h  get environment string
 00B6h  get exec path
 00B7h  get configuration directory
 00B8h  open file
 00B9h  get PSP segment
 00BAh  get DOS vectors
 00BBh  get machine information
 00BCh  get/set HMA information
 00BDh  set system exit code
 00BEh  fatal error handler
 00BFh  fatal memory error
 00C0h  update system clock
 00C1h  test if debugger installed
 00C2h  output debugger string
 00C3h  output debugger character
 00C4h  input debugger character
 00C5h  debugger convert hex to binary
 00C6h  debugger convert hex to decimal
 00C7h  debugger test if valid handle
 00C8h  validate client pointer
 00C9h  test reentry
 00CAh  queue debugger string
 00CBh  log procedure call
 00CCh  debugger test current VM
 00CDh  get PM interrupt type
 00CEh  set PM interrupt type
 00CFh  get last updated system time
 00D0h  get last updated VM execution time
 00D1h  test if double-byte character-set lead byte
 00D2h  _AddFreePhysPage
 00D3h  _PageResetHandlePAddr
 00D4h  _SetLastV86Page
 00D5h  _GetLastV86Page
 00D6h  _MapFreePhysReg
 00D7h  _UnmapFreePhysReg
 00D8h  _XchgFreePhysReg
 00D9h  _SetFreePhysRegCalBk
 00DAh  get next arena (MCB)
 00DBh  get name of ugly TSR
 00DCh  get debug options
 00DDh  set physical HMA alias
 00DEh  _GetGlblRng0V86IntBase
 00DFh  add global V86 data area
 00E0h  get/set detailed VM error
 00E1h  Is_Debug_Chr
 00E2h  clear monochrome screen
 00E3h  output character to mono screen
 00E4h  output string to mono screen
 00E5h  set current position on mono screen
 00E6h  get current position on mono screen
 00E7h  get character from mono screen
 00E8h  locate byte in ROM
 00E9h  hook invalid page fault
 00EAh  unhook invalid page fault
 00EBh  set delete on exit file
 00ECh  close VM
 00EDh  "Enable_Touch_1st_Meg"
 00EEh  "Disable_Touch_1st_Meg"
 00EFh  install exception handler
 00F0h  remove exception handler
 00F1h  "Get_Crit_Status_No_Block"
 00F2h  "_Schedule_VM_RTI_Event"
 00F3h  "_Trace_Out_Service"
 00F4h  "_Debug_Out_Service"
 00F5h  "_Debug_Flags_Service"
 00F6h  VMM add import module name
 00F7h  VMM Add DDB
 00F8h  VMM Remove DDB
 00F9h  get thread time slice priority
 00FAh  set thread time slice priority
 00FBh  schedule thread event
 00FCh  cancel thread event
 00FDh  set thread timeout
 00FEh  set asynchronous timeout
 00FFh  "_AllocatreThreadDataSlot"
 0100h  "_FreeThreadDataSlot"
 0101h  create Mutex
 0102h  destroy Mutex
 0103h  get Mutex owner
 0104h  call when thread switched
 0105h  create thread
 0106h  start thread
 0107h  terminate thread
 0108h  get current thread handle
 0109h  test current thread handle
 010Ah  "Get_Sys_Thread_Handle"
 010Bh  "Test_Sys_Thread_Handle"
 010Ch  "Validate_Thread_Handle"
 010Dh  "Get_Initial_Thread_Handle"
 010Eh  "Test_Initial_Thread_Handle"
 010Fh  "Debug_Test_Valid_Thread_Handle"
 0110h  "Debug_Test_Cur_Thread"
 0111h  "VMM_GetSystemInitState"
 0112h  "Cancel_Call_When_Thread_Switched"
 0113h  "Get_Next_Thread_Handle"
 0114h  "Adjust_Thread_Exec_Priority"
 0115h  "_Deallocate_Device_CB_Area"
 0116h  "Remove_IO_Handler"
 0117h  "Remove_Mult_IO_Handlers"
 0118h  unhook V86 interrupt chain
 0119h  unhook V86 fault handler
 011Ah  unhook PM fault handler
 011Bh  unhook VMM fault handler
 011Ch  unhook device service
 011Dh  "_PageReserve"
 011Eh  "_PageCommit"
 011Fh  "_PageDecommit"
 0120h  "_PagerRegister"
 0121h  "_PagerQuery"
 0122h  "_PagerDeregister"
 0123h  "_ContextCreate"
 0124h  "_ContextDestroy"
 0125h  "_PageAttach"
 0126h  "_PageFlush"
 0127h  "_SignalID"
 0128h  "_PageCommitPhys"
 0129h  "_Register_Win32_Services"
 012Ah  "Cancel_Call_When_Not_Critical"
 012Bh  "Cancel_Call_When_Idle"
 012Ch  "Cancel_Call_When_Task_Switched"
 012Dh  "_Debug_Printf_Service"
 012Eh  enter Mutex
 012Fh  leave Mutex
 0130h  simulate VM I/O
 0131h  "Signal_Semaphore_No_Switch"
 0132h  "_MMSwitchContext"
 0133h  "_MMModifyPermissions"
 0134h  "_MMQuery"
 0135h  "_EnterMustComplete"
 0136h  "_LeaveMustComplete"
 0137h  "_ResumeExecMustComplete"
 0138h  get thread termination status
 0139h  "_GetInstanceInfo"
 013Ah  "_ExecIntMustComplete"
 013Bh  "_ExecVxDIntMustComplete"
 013Ch  begin V86 serialization
 013Dh  unhook V86 page
 013Eh  "VMM_GetVxDLocationList"
 013Fh  "VMM_GetDDBList" get start of VxD chain
        (see also #02657 at INT 2F/AX=1684h/BX=0017h)
 0140h  unhook NMI event
 0141h  "Get_Instanced_V86_Int_Vector"
 0142h  get or set real DOS PSP
 0143h  call priority thread event
 0144h  "Get_System_Time_Address"
 0145h  "Get_Crit_Status_Thread"
 0146h  "Get_DDB"
 0147h  "Directed_Sys_Control"
 0148h  "_RegOpenKey"
 0149h  "_RegCloseKey"
 014Ah  "_RegCreateKey"
 014Bh  "_RegDeleteKey"
 014Ch  "_RegEnumKey"
 014Dh  "_RegQueryValue"
 014Eh  "_RegSetValue"
 014Fh  "_RegDeleteValue"
 0150h  "_RegEnumValue"
 0151h  "_RegQueryValueEx"
 0152h  "_RegSetValueEx"
 0153h  "_CallRing3"
 0154h  "Exec_PM_Int"
 0155h  "_RegFlushKey"
 0156h  "_PageCommitContig"
 0157h  "_GetCurrentContext"
 0158h  "_LocalizeSprintf"
 0159h  "_LocalizeStackSprintf"
 015Ah  "Call_Restricted_Event"
 015Bh  "Cancel_Restricted_Event"
 015Ch  "Register_PEF_Provider"
 015Dh  "_GetPhysPageInfo"
 015Eh  "_RegQueryInfoKey"
 015Fh  "MemArb_Reserve_Pages"
 0160h  "Time_Slice_Sys_VM_Idle"
 0161h  "Time_Slice_Sleep"
 0162h  "Boost_With_Decay"
 0163h  "Set_Inversion_Pri"
 0164h  "Reset_Inversion_Pri"
 0165h  "Release_Inversion_Pri"
 0166h  "Get_Thread_Win32_Pri"
 0167h  "Set_Thread_Win32_Pri"
 0168h  "Set_Thread_Static_Boost"
 0169h  "Set_VM_Static_Boost"
 016Ah  "Release_Inversion_Pri_ID"
 016Bh  "Attach_Thread_To_Group"
 016Ch  "Detach_Thread_From_Group"
 016Dh  "Set_Group_Static_Boost"
 016Eh  "_GetRegistryPath"
 016Fh  "_GetRegistryKey"
 0170h  "_CleanupNestedExec"
 0171h  "_RegRemapPreDefKey"
 0172h  "End_V86_Serialization"
 0173h  "_Assert_Range"
 0174h  "_Sprintf"
 0175h  "_PageChangePager"
 0176h  "_RegCreateDynKey"
 0177h  "RegQMulti"
 0178h  "Boost_Thread_With_VM"
 0179h  "Get_Boot_Flags"
 017Ah  "Set_Boot_Flags"
 017Bh  "_lstrcpyn"
 017Ch  "_lstrlen"
 017Dh  "_lmemcpy"
 017Eh  "_GetVxDName"
 017Fh  "Force_Mutexes_Free"
 0180h  "Restore_Forced_Mutexes"
 0181h  "_AddReclaimableItem"
 0182h  "_SetReclaimableItem"
 0183h  "_EnumReclaimableItem"
 0184h  "Time_Slice_Wake_Sys_VM"
 0185h  "VMM_Replace_Global_Environment"
 0186h  "Begin_Non_Serial_Nest_V86_Exec"
 0187h  "Get_Nest_Exec_Status"
 0188h  "Open_Boot_Log"
 0189h  "Write_Boot_Log"
 018Ah  "Close_Boot_Log"
 018Bh  "EnableDisable_Boot_Log"
 018Ch  "_Call_On_My_Stack"
 018Dh  "Get_Inst_V86_Int_Vec_Base"
 018Eh  "_lstrcmpi"
 018Fh  "_strupr"
 0190h  "Log_Fault_Call_Out"
 0191h  "_AtEventTime"
 0191h  ...last service for Windows95 SP1
 811Ch  unhook device service??? (called by KEYREMAP.VXD)
        EAX = service ID (high word = VxD ID, low = service number)
        ESI -> handler
SeeAlso: #01266,#01267,INT 2F/AX=1684h/BX=0001h
--------W-20----Vx0002-----------------------
INT 20 P - Microsoft Windows - DEBUG - VxD SERVICES
        VxD = 0002h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01266,#01340

(Table 01266)
Values for DEBUG (VxD ID 0002h) service number:
 0000h  get version
 0001h  "DEBUG_Fault"
 0002h  "DEBUG_CheckFault"
 0003h  "_DEBUG_LoadSyms"
SeeAlso: #01265,#01267
--------W-20----Vx0003-----------------------
INT 20 P - Microsoft Windows - VPICD - VxD SERVICES
        VxD = 0003h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01267,#01340

(Table 01267)
Values for VPICD (VxD ID 0003h) service number:
 0000h  get version
 0001h  virtualize IRQ
 0002h  set interrupt request
 0003h  clear interrupt request
 0004h  physical EOI
 0005h  get complete status
 0006h  get status
 0007h  test physical request
 0008h  physically mask
 0009h  physically unmask
 000Ah  set automatic masking
 000Bh  get IRQ complete status
 000Ch  convert handle to IRQ
 000Dh  convert IRQ to interrupt
 000Eh  convert interrupt to IRQ
 000Fh  call on hardware interrupt
 0010h  force default owner
 0011h  force default behavior
 0012h  "VPICD_Auto_Mask_At_Inst_Swap"
 0013h  "VPICD_Begin_Inst_Page_Swap"
 0014h  "VPICD_End_Inst_Page_Swap"
 0015h  "VPICD_Virtual_EOI"
 0016h  "VPICD_Get_Virtualization_Count"
 0017h  "VPICD_Post_Sys_Critical_Init"
 0018h  "VPICD_VM_SlavePIC_Mask_Change"
SeeAlso: #01265,#01268,INT 2F/AX=1684h/BX=0003h
--------W-20----Vx0004-----------------------
INT 20 P - Microsoft Windows - VDMAD - VxD SERVICES
        VxD = 0004h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01268)
Values for VDMAD (VxD ID 0004h) service number:
 0000h  get version
 0001h  virtualize channel
 0002h  get region information
 0003h  set region information
 0004h  get virtual state
 0005h  set virtual state
 0006h  set physical state
 0007h  mask channel
 0008h  unmask channel
 0009h  lock DMA region
 000Ah  unlock DMA region
 000Bh  scatter lock
 000Ch  scatter unlock
 000Dh  reserve buffer space
 000Eh  request buffer
 000Fh  release buffer
 0010h  copy to buffer
 0011h  copy from buffer
 0012h  default handler
 0013h  disable translation
 0014h  enable translation
 0015h  get EISA address mode
 0016h  set EISA address mode
 0017h  unlock DMA region (ND)
 0018h  "VDMAD_Phys_Mask_Channel"
 0019h  "VDMAD_Phys_Unmask_Channel"
 001Ah  "VDMAD_Unvirtualize_Channel"
 001Bh  "VDMAD_Set_IO_Address"
 001Ch  "VDMAD_Get_Phys_Count"
 001Dh  "VDMAD_Get_Phys_Status"
 001Eh  "VDMAD_Get_Max_Phys_Page"
 001Fh  "VDMAD_Set_Channel_Callbacks"
 0020h  "VDMAD_Get_Virt_Count"
 0021h  "VDMAD_Set_Virt_Count"
 0021h  ...last service for Windows95 SP1
SeeAlso: #01267,#02646,#02683 at INT 2F/AX=1684h/BX=0444h
--------W-20----Vx0005-----------------------
INT 20 P - Microsoft Windows - VTD - VxD SERVICES
        VxD = 0005h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01269)
Values for VTD (VxD ID 0005h) service number:
 0000h  get version
 0001h  update system clock
 0002h  get interrupt period
 0003h  begin minimum interrupt period
 0004h  end minimum interrupt period
 0005h  disable trapping
 0006h  enable trapping
 0007h  get real time
        Return: EDX:EAX = time in 840ns units since Windows was started
 0008h  "VTD_Get_Date_And_Time"
 0009h  "VTD_Adjust_VM_Count"
 000Ah  "VTD_Delay"
SeeAlso: #02646 at INT 2F/AX=1684h/BX=0005h
--------W-20----Vx0006-----------------------
INT 20 P - Microsoft Windows - V86MMGR - VxD SERVICES
        VxD = 0006h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01270)
Values for V86MMGR (VxD ID 0006h) service number:
 00h    get version
 01h    allocate V86 pages
 02h    set EMS and XMS limits
 03h    get EMS and XMS limits
 04h    set mapping information
 05h    get mapping information
 06h    Xlat API
 07h    load client pointer
 08h    allocate buffer
 09h    free buffer
 0Ah    get Xlat buffer state
 0Bh    set Xlat buffer state
 0Ch    get VM flat selector
 0Dh    map pages
 0Eh    free page map region
 0Fh    _LocalGlobalReg
 10h    get page status
 11h    set local A20
 12h    reset base pages
 13h    set available mapped pages
 14h    "V86MMGR_NoUMBInitCalls"
 15h    "V86MMGR_Get_EMS_XMS_Avail"
 16h    "V86MMGR_Toggle_HMA"
        EAX = ???
 17h    "V86MMGR_Dev_Init"
 18h    "V86MMGR_Alloc_UM_Page"
SeeAlso: #02646,#01271,INT 2F/AX=1684h"DEVICE API"
--------W-20----Vx0007-----------------------
INT 20 P - Microsoft Windows - PageSwap - VxD SERVICES
        VxD = 0007h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01271)
Values for PageSwap (VxD ID 0007h) service number:
 00h    get version
 01h    test create
 02h    create swap file
 03h    destroy swap file
 04h    in
 05h    out
 06h    test if I/O valid
 07h    "Read_Or_Write"
 08h    "Grow_File"
 09h    "Init_File"
SeeAlso: #01270,#01272,#01273,#02648
--------W-20----Vx0009-----------------------
INT 20 P - Microsoft Windows - REBOOT - VxD SERVICES
        VxD = 0009h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01272)
Values for REBOOT (VxD ID 0009h) service number:
 00h    get REBOOT version???
 01h    ???
 02h    ???
 03h    ...last service for Windows95 SP1
SeeAlso: #01271,#01273,#02642
--------W-20----Vx000A-----------------------
INT 20 P - Microsoft Windows - VDD - VxD SERVICES
        VxD = 000Ah
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01273)
Values for VDD (VxD ID 000Ah) service number:
 00h    get version
 01h    PIF state
 02h    get GrabRtn
 03h    hide cursor
 04h    set VM type
 05h    get ModTime
 06h    set HCurTrk
 07h    message clear screen
 08h    message foreground color
 09h    message background color
 0Ah    message output text
 0Bh    message set cursor position
 0Ch    query access
 0Dh    "VDD_Check_Update_Soon"
 0Eh    "VDD_Get_Mini_Dispatch_Table"
 0Fh    "VDD_Register_Virtual_Port"
        DX = base I/O port number
        CL = number of contiguous ports???
 10h    "VDD_Get_VM_Info"
 11h    "VDD_Get_Special_VM_IDs"
        Return: ESI = ???
                EDI = ???
 12h    "VDD_Register_Extra_Screen_Selector"
 13h    "VDD_Takeover_VGA_Port"
        DX = VGA I/O port number (03C2h, etc.)
        ECX -> routine to call on I/O access
        Return: ECX -> previous handler (to be jumped to at end of new handler)
 14h    ???
 15h    ???
 16h    ...last service for Windows95 SP1
SeeAlso: #01272,#01274,#02648
--------W-20----Vx000B-----------------------
INT 20 P - Microsoft Windows - VSD - VxD SERVICES
        VxD = 000Bh
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01274)
Values for VSD (VxD ID 000Bh) service number:
 00h    get version
 01h    bell
 02h    sound on
 03h    "VSD_TakeSoundPort"
SeeAlso: #01273,#01275
--------W-20----Vx000C-----------------------
INT 20 P - Microsoft Windows - VMD / VMOUSE - VxD SERVICES
        VxD = 000Ch
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01275)
Values for VMD / VMOUSE (VxD ID 000Ch) service number:
 0000h  get version
 0001h  set mouse type
 0002h  get mouse owner
 0003h  "VMOUSE_Post_Pointer_Message"
 0004h  "VMOUSE_Set_Cursor_Proc"
 0005h  "VMOUSE_Call_Cursor_Proc"
 0006h  "VMOUSE_Set_Mouse_Data~Get_Mouse_Data"
 0007h  "VMOUSE_Manipulate_Pointer_Message"
 0008h  "VMOUSE_Set_Middle_Button"
 0009h  "VMD_Set_Middle_Button"
 000Ah  "VMD_Enable_Disable_Mouse_Events"
 000Bh  "VMD_Post_Absolute_Pointer_Message"
        ...last service for Windows95 SP1
SeeAlso: #01274,#01276,INT 2F/AX=1684h/BX=000Ch
--------W-20----Vx000D-----------------------
INT 20 P - Microsoft Windows - VKD - VxD SERVICES
        VxD = 000Dh
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01276)
Values for VKD (VxD ID 000Dh) service number:
 0000h  get version
 0001h  define hotkey
 0002h  remove hotkey
 0003h  locally enable hotkey
 0004h  locally disable hotkey
 0005h  reflect hotkey
 0006h  cancel hotkey state
 0007h  force keys
 0008h  get keyboard owner
 0009h  define paste mode
 000Ah  start pasting
 000Bh  cancel paste
 000Ch  get message key
 000Dh  peek message key
 000Eh  flush message key queue
 000Fh  "VKD_Enable_Keyboard"
 0010h  "VKD_Disable_Keyboard"
 0011h  "VKD_Get_Shift_State"
 0012h  "VKD_Filter_Keyboard_Input"
 0013h  "VKD_Put_Byte"
 0014h  "VKD_Set_Shift_State"
        ...last service for Windows95 SP1
SeeAlso: #01275,#01277
--------W-20----Vx000E-----------------------
INT 20 P - Microsoft Windows - VCD - VxD SERVICES
        VxD = 000Eh
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01277)
Values for VCD (VxD ID 000Eh) service number:
 0000h  get version
 0001h  set port global
 0002h  get focus
 0003h  virtualize port
 0004h  "VCD_Acquire_Port"
 0005h  "VCD_Free_Port"
 0006h  "VCD_Acquire_Port_Windows_Style"
 0007h  "VCD_Free_Port_Windows_Style"
 0008h  "VCD_Steal_Port_Windows_Style"
 0009h  "VCD_Find_COM_Index"
 000Ah  "VCD_Set_Port_Global_Special"
 000Bh  "VCD_Virtualize_Port_Dynamic"
 000Ch  "VCD_Unvirtualize_Port_Dynamic"
        ...last service for Windows95 SP1
SeeAlso: #01276,#01278
--------W-20----Vx0010-----------------------
INT 20 P - Microsoft Windows - BlockDev / IOS - VxD SERVICES
        VxD = 0010h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01278)
Values for BlockDev/IOS (VxD ID 0010h) service number:
 0000h  get version
 0001h  register device
 0002h  find INT 13 drive
 0003h  get device list
 0004h  send command
 0005h  command complete
 0006h  synchronous command
 0007h  "IOS_Register"
 0008h  "IOS_Requestor_Service"
 0009h  "IOS_Exclusive_Access"
 000Ah  "IOS_Send_Next_Command"
 000Bh  "IOS_Set_Async_Time_Out"
 000Ch  "IOS_Signal_Semaphore_No_Switch"
 000Dh  "IOSIdleStatus"
 000Eh  "IOSMapIORSToI24"
 000Fh  "IOSMapIORSToI21"
 0010h  "PrintLog"
SeeAlso: #01277,#01279
--------W-20----Vx0011-----------------------
INT 20 P - Microsoft Windows - VMCPD - VxD SERVICES
        VxD = 0011h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01279)
Values for VMCPD (VxD ID 0011h) service number:
 0000h  "VMCPD_Get_Version"
 0001h  "VMCPD_Get_Virt_State"
 0002h  "VMCPD_Set_Virt_State"
 0003h  "VMCPD_Get_CR0_State"
 0004h  "VMCPD_Set_CR0_State"
 0005h  "VMCPD_Get_Thread_State"
 0006h  "VMCPD_Set_Thread_State"
 0007h  "_VMCPD_Get_FP_Instruction_Size"
 0008h  "VMCPD_Set_Thread_Precision"
SeeAlso: #01278,#01280,#02642
--------W-20----Vx0012-----------------------
INT 20 P - Microsoft Windows - EBIOS - VxD SERVICES
        VxD = 0012h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01280)
Values for EBIOS (VxD ID 0012h) service number:
 00h    get EBIOS version
 01h    get unused memory
SeeAlso: #01279,#01281
--------W-20----Vx0014-----------------------
INT 20 P - Microsoft Windows - VNETBIOS - VxD SERVICES
        VxD = 0014h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01281)
Values for VNETBIOS (VxD ID 0014h) service number:
 00h    get version
 01h    register
 02h    submit
 03h    enum
 04h    deregister
 05h    register2
 06h    map
 07h    enum2
SeeAlso: #01280,#01282
--------W-20----Vx0015-----------------------
INT 20 P - Microsoft Windows - DOSMGR - VxD SERVICES
        VxD = 0015h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01282)
Values for DOSMGR (VxD ID 0015h) service number:
 0000h  get version
 0001h  set exec VM data
 0002h  coyp VM drive state
 0003h  execute VM
 0004h  get InDOS pointer
 0005h  add device
 0006h  remove device
 0007h  instance device
 0008h  get DOS critical status
 0009h  enable InDOS polling
 000Ah  backfill allowed
 000Bh  "LocalGlobalReg"
 000Ch  "Init_UMB_Area"
 000Dh  "Begin_V86_App"
 000Eh  "End_V86_App"
 000Fh  "Alloc_Local_Sys_VM_Mem"
        EAX = number of paragraphs??? to allocate
 0010h  "DOSMGR_Grow_CDSs"
 0011h  "DOSMGR_Translate_Server_DOS_Call"
 0012h  "DOSMGR_MMGR_PSP_Change_Notifier"
SeeAlso: #01281,#02656 at INT 2F/AX=1684h/BX=0015h
--------W-20----Vx0017-----------------------
INT 20 P - Microsoft Windows - SHELL - VxD SERVICES
        VxD = 0017h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01283)
Values for SHELL (VxD ID 0017h) service number:
 0000h  get version
 0001h  resolve contention
 0002h  event
 0003h  SYSMODAL message
 0004h  message
 0005h  get VM information
 0006h  "_SHELL_PostMessage"
 0007h  "_SHELL_WinExec"
 0008h  "_SHELL_CallDll"
 0009h  "SHELL_OpenClipboard"
 000Ah  "SHELL_SetClipboardData"
 000Bh  "SHELL_GetClipboardData"
 000Ch  "SHELL_CloseClipboard"
 000Dh  "_SHELL_Install_Taskman_Hooks"
 000Eh  "SHELL_Hook_Properties"
 000Fh  "SHELL_Unhook_Properties"
 0010h  "SHELL_OEMKeyScan"
 0011h  "SHELL_Update_User_Activity"
 0012h  "_SHELL_UnhookSystemBroadcast"
 0013h  "_SHELL_LocalAllocEx"
 0014h  "_SHELL_LocalFree"
 0015h  "_SHELL_LoadLibrary"
 0016h  "_SHELL_FreeLibrary"
 0017h  "_SHELL_GetProcAddress"
 0018h  "_SHELL_CallDll"
 0019h  "_SHELL_SuggestSingleMSDOSMode"
 001Ah  "SHELL_CheckHotkeyAllowed"
 001Bh  "_SHELL_GetDOSAppInfo"
SeeAlso: #01282,#01284,#02657 at INT 2F/AX=1684h/BX=0017h
--------W-20----Vx0018-----------------------
INT 20 P - Microsoft Windows - VMPoll - VxD SERVICES
        VxD = 0018h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01284)
Values for VMPoll (VxD ID 0018h) service number:
 00h    get version
 01h    enable/disable
 02h    reset detection
 03h    check idle
SeeAlso: #01269,#02657 at INT 2F/AX=1684h/BX=0017h
--------W-20----Vx001A-----------------------
INT 20 P - Microsoft Windows - DOSNET - VxD SERVICES
        VxD = 001Ah
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01285)
Values for DOSNET (VxD ID 001Ah) service number:
 00h    get version
 01h    send FILESYSCHANGE
 02h    do PSP adjust
SeeAlso: #01284,#01286
--------W-20----Vx001B-----------------------
INT 20 P - Microsoft Windows - VFD - VxD SERVICES
        VxD = 001Bh
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01286,#01340

(Table 01286)
Values for VFD (VxD ID 001Bh) service number:
 0000h  get version
SeeAlso: #01285,#01287
--------W-20----Vx001C-----------------------
INT 20 P - Microsoft Windows - LoadHi - VxD SERVICES
        VxD = 001Ch
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01287)
Values for LoadHi (VxD ID 001Ch) service number:
 00h    get version
        Return: CF clear
                EAX = version (AH = major, AL = minor)
                ESI -> ASCIZ signature "LoadHi"
SeeAlso: #01286,#01288
--------W-20----Vx0020-----------------------
INT 20 P - Microsoft Windows - Int13 - VxD SERVICES
        VxD = 0020h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01288)
Values for Int13 (VxD ID 0020h) service number:
 00h    get version
 01h    device registered
 02h    translate VM interrupt
 03h    hooking BIOS interrupt
 04h    unhooking BIOS interrupt
SeeAlso: #01287,#01289
--------W-20----Vx0021-----------------------
INT 20 P - Microsoft Windows - PAGEFILE - VxD SERVICES
        VxD = 0021h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01289)
Values for PAGEFILE (VxD ID 0021h) service number:
 00h    get version
 01h    init file
 02h    clean up
 03h    grow file
 04h    read or write
 05h    cancel
 06h    test I/O valid
 07h    "Get_Size_Info"
 08h    "Set_Async_Manager"
 09h    "Call_Async_Manager"
SeeAlso: #01288,#02661 at INT 2F/AX=1684h/BX=0021h
--------W-20----Vx0026-----------------------
INT 20 P - Microsoft Windows - VPOWERD - VxD SERVICES
        VxD = 0026h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01290)
Values for VPOWERD (VxD ID 0026h) service number:
 00h    get version
        Return: CF clear
                EAX = version (AH = major, AL = minor)
 01h    get APM BIOS version
        Return: CF clear
                EAX = APM BIOS version
 02h    get current power management level
        Return: CF clear
                EAX = power management level
 03h    enable/disable power management (see INT 15/AX=5308h)
        Return: EAX = error code (see #02665) or 00000000h if successful
 04h    set power state (see INT 15/AX=5307h)
        ???
        Return: EAX = error code (see #02665) or 00000000h if successful
 05h    set system power status
        Return: EAX = error code (see #02665) or 00000000h if successful
 06h    restore APM power-on defaults (see INT 15/AX=5309h)
        Return: EAX = error code (see #02665) or 00000000h if successful
 07h    get power status (see INT 15/AX=530Ah)
        Return: ???
 08h    get APM 1.1 power state (see INT 15/AX=530Ch)
        Return: ???
 09h    invoke OEM APM function
        ??? -> bufer containing parameters for INT 15/AX=5380h
        Return: EAX = error code (see #02665) or 00000000h if successful
                buffer updated if successful
 0Ah    register power handler
        ???
        Return: EAX = error code (see #02665) or 00000000h if successful
 0Bh    deregister power handler
        ???
        Return: EAX = error code (see #02665) or 00000000h if successful
 0Ch    Win32 get system power status
 0Dh    Win32 set system power status
SeeAlso: #01289,#01291,INT 2F/AX=1684h/BX=0026h
--------W-20----Vx0027-----------------------
INT 20 P - Microsoft Windows - VXDLDR - VxD SERVICES
        VxD = 0027h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01291)
Values for VXDLDR (VxD ID 0027h) service number:
 0000h  "VXDLDR_Get_Version"
 0001h  "VXDLDR_LoadDevice"
 0002h  "VXDLDR_UnloadDevice"
 0003h  "VXDLDR_DevInitSucceeded"
 0004h  "VXDLDR_DevInitFailed"
 0005h  "VXDLDR_GetDeviceList"
 0006h  "VXDLDR_UnloadMe"
 0007h  "PELDR_LoadModule"
 0008h  "PELDR_GetModuleHandle"
 0009h  "PELDR_GetModuleUsage"
 000Ah  "PELDR_GetEntryPoint"
 000Bh  "PELDR_GetProcAddress"
 000Ch  "PELDR_AddExportTable"
 000Dh  "PELDR_RemoveExportTable"
 000Eh  "PELDR_FreeModule"
 000Fh  "VXDLDR_Notify"
 0010h  "_PELDR_InitCompleted"
 0011h  "_PELDR_LoadModuleEx"
SeeAlso: #01289,#01292
--------W-20----Vx0028-----------------------
INT 20 P - Microsoft Windows - NDIS - VxD SERVICES
        VxD = 0028h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01292)
Values for NDIS (VxD ID 0028h) service number:
 00h    "NdisGetVersion"
 01h    "NdisAllocateSpinLock"
 02h    "NdisFreeSpinLock"
 03h    "NdisAcquireSpinLock"
 04h    "NdisReleaseSpinLock"
 05h    "NdisOpenConfiguration"
 06h    "NdisReadConfiguration"
 07h    "NdisCloseConfiguration"
 08h    "NdisReadEisaSlotInformation"
 09h    "NdisReadMcaPosInformation"
 0Ah    "NdisAllocateMemory"
 0Bh    "NdisFreeMemory"
 0Ch    "NdisSetTimer"
 0Dh    "NdisCancelTimer"
 0Eh    "NdisStallExecution"
 0Fh    "NdisInitializeInterrupt"
 10h    "NdisRemoveInterrupt"
 11h    "NdisSynchronizeWithInterrupt"
 12h    "NdisOpenFile"
 13h    "NdisMapFile"
 14h    "NdisUnmapFile"
 15h    "NdisCloseFile"
 16h    "NdisAllocatePacketPool"
 17h    "NdisFreePacketPool"
 18h    "NdisAllocatePacket"
 19h    "NdisReinitializePacket"
 1Ah    "NdisFreePacket"
 1Bh    "NdisQueryPacket"
 1Ch    "NdisAllocateBufferPool"
 1Dh    "NdisFreeBufferPool"
 1Eh    "NdisAllocateBuffer"
 1Fh    "NdisCopyBuffer"
 20h    "NdisFreeBuffer"
 21h    "NdisQueryBuffer"
 22h    "NdisGetBufferPhysicalAddress"
 23h    "NdisChainBufferAtFront"
 24h    "NdisChainBufferAtBack"
 25h    "NdisUnchainBufferAtFront"
 26h    "NdisUnchainBufferAtBack"
 27h    "NdisGetNextBuffer"
 28h    "NdisCopyFromPacketToPacket"
 29h    "NdisRegisterProtocol"
 2Ah    "NdisDeregisterProtocol"
 2Bh    "NdisOpenAdapter"
 2Ch    "NdisCloseAdapter"
 2Dh    "NdisSend"
 2Eh    "NdisTransferData"
 2Fh    "NdisReset"
 30h    "NdisRequest"
 31h    "NdisInitializeWrapper"
 32h    "NdisTerminateWrapper"
 33h    "NdisRegisterMac"
 34h    "NdisDeregisterMac"
 35h    "NdisRegisterAdapter"
 36h    "NdisDeregisterAdapter"
 37h    "NdisCompleteOpenAdapter"
 38h    "NdisCompleteCloseAdapter"
 39h    "NdisCompleteSend"
 3Ah    "NdisCompleteTransferData"
 3Bh    "NdisCompleteReset"
 3Ch    "NdisCompleteRequest"
 3Dh    "NdisIndicateReceive"
 3Eh    "NdisIndicateReceiveComplete"
 3Fh    "NdisIndicateStatus"
 40h    "NdisIndicateStatusComplete"
 41h    "NdisCompleteQueryStatistics"
 42h    "NdisEqualString"
 43h    "NdisNetAddressStringToBinary"
 44h    "NdisReadNetworkAddress"
 45h    "NdisWriteErrorLogEntry"
 46h    "C_MapPhysToLinear"
 47h    "C_HeapFree"
 48h    "NdisAllocateSharedMemory"
 49h    "NdisFreeSharedMemory"
 ...
 5Fh    ...last service for Windows95 SP1
SeeAlso: #01291,#01293
--------W-20----Vx002A-----------------------
INT 20 P - Microsoft Windows - VWIN32 - VxD SERVICES
        VxD = 002Ah
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01293)
Values for VWIN32 (VxD ID 002Ah) service number:
 0000h  "VWin32_Get_Version"
 0001h  "VWin32_Wake_For_Event"
 0002h  "_VWIN32_QueueUserApc"
 0003h  "_VWIN32_Get_Thread_Context"
 0004h  "_VWIN32_Set_Thread_Context"
 0005h  "_VWIN32_CopyMem"
 0006h  "_VWIN32_BlockForTermination"
 0007h  "_VWIN32_Emulate_Npx"
 0008h  "_VWIN32_CheckDelayedNpxTrap"
 0009h  "VWIN32_EnterCrstR0"
 000Ah  "VWIN32_LeaveCrstR0"
 000Bh  "_VWIN32_FaultPopup"
 000Ch  "VWIN32_GetContextHandle"
 000Dh  "VWIN32_GetCurrentProcessHandle"
 000Eh  "_VWIN32_SetWin32Event"
 000Fh  "_VWIN32_PulseWin32Event"
 0010h  "_VWIN32_ResetWin32Event"
 0011h  "_VWIN32_WaitSingleObject"
 0012h  "_VWIN32_WaitMultipleObjects"
 0013h  "_VWIN32_CreateRing0Thread"
 0014h  "_VWIN32_CloseVxDHandle"
 0015h  "VWIN32_ActiveTimeBiasSet"
 0016h  "VWIN32_GetCurrentDirectory"
 0017h  "VWIN32_BlueScreenPopup"
 0018h  "VWIN32_TerminateApp"
 0019h  "_VWIN32_QueueKernelAPC"
 001Ah  "VWIN32_SysErrorBox"
 001Bh  "_VWIN32_IsClientWin32"
 001Ch  "VWIN32_IFSRIPWhenLev2Taken"
SeeAlso: #01292,#01294
--------W-20----Vx002B-----------------------
INT 20 P - Microsoft Windows - VCOMM - VxD SERVICES
        VxD = 002Bh
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01294)
Values for VCOMM (VxD ID 002Bh) service number:
 0000h  "VCOMM_Get_Version"
 0001h  "_VCOMM_Register_Port_Driver"
 0002h  "_VCOMM_Acquire_Port"
 0003h  "_VCOMM_Release_Port"
 0004h  "_VCOMM_OpenComm"
 0005h  "_VCOMM_SetCommState"
 0006h  "_VCOMM_GetCommState"
 0007h  "_VCOMM_SetupComm"
 0008h  "_VCOMM_TransmitCommChar"
 0009h  "_VCOMM_CloseComm"
 000Ah  "_VCOMM_GetCommQueueStatus"
 000Bh  "_VCOMM_ClearCommError"
 000Ch  "_VCOMM_GetModemStatus"
 000Dh  "_VCOMM_GetCommProperties"
 000Eh  "_VCOMM_EscapeCommFunction"
 000Fh  "_VCOMM_PurgeComm"
 0010h  "_VCOMM_SetCommEventMask"
 0011h  "_VCOMM_GetCommEventMask"
 0012h  "_VCOMM_WriteComm"
 0013h  "_VCOMM_ReadComm"
 0014h  "_VCOMM_EnableCommNotification"
 0015h  "_VCOMM_GetLastError"
 0016h  "_VCOMM_Steal_Port"
 0017h  "_VCOMM_SetReadCallBack"
 0018h  "_VCOMM_SetWriteCallBack"
 0019h  "_VCOMM_GetSetCommTimeouts"
 001Ah  "_VCOMM_SetWriteRequest"
 001Bh  "_VCOMM_SetReadRequest"
 001Ch  "_VCOMM_Dequeue_Request"
 001Dh  "_VCOMM_Dequeue_Request"
 001Eh  "_VCOMM_Enumerate_DevNodes"
 001Fh  "VCOMM_Map_Win32DCB_To_Ring0"
 0020h  "VCOMM_Map_Ring0DCB_To_Win32"
 0021h  "_VCOMM_Get_Contention_Handler"
 0022h  "_VCOMM_Map_Name_To_Resource"
SeeAlso: #01293,#01295
--------W-20----Vx002C-----------------------
INT 20 P - Microsoft Windows - SPOOLER - VxD SERVICES
        VxD = 002Ch
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01295)
Values for SPOOLER (VxD ID 002Ch) service number:
 0000h  get version???
 0001h  ???
 0010h  ...last service for Windows95 SP1
SeeAlso: #01294,#01296
--------W-20----Vx0032-----------------------
INT 20 P - Microsoft Windows - VSERVER - VxD SERVICES
        VxD = 0032h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01296)
Values for VSERVER (VxD ID 0032h) service number:
 00h    get VSERVER version
        Return: CF clear
                EAX = version (AH = major, AL = minor)
                EBX = ??? (00000000h)
 01h    allocate ???
        AX = ???
        ESI = ???
        Return: CF clear if successful
                CF set on error (table full)
 02h    NOP???
        Return: EBX = 00000000h
 03h    ???
        Return: ZF clear
SeeAlso: #01295,#01297,INT 2F/AX=1684h/BX=0032h
--------W-20----Vx0033-----------------------
INT 20 P - Microsoft Windows - CONFIGMG - VxD SERVICES
        VxD = 0033h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01297)
Values for CONFIGMG (VxD ID 0033h) service number:
 0000h  "_CONFIGMG_Get_Version"
 0001h  "_CONFIGMG_Initialize"
 0002h  "_CONFIGMG_Locate_DevNode"
 0003h  "_CONFIGMG_Get_Parent"
 0004h  "_CONFIGMG_Get_Child"
 0005h  "_CONFIGMG_Get_Sibling"
 0006h  "_CONFIGMG_Get_Device_ID_Size"
 0007h  "_CONFIGMG_Get_Device_ID"
 0008h  "_CONFIGMG_Get_Depth"
 0009h  "_CONFIGMG_Get_Private_DWord"
 000Ah  "_CONFIGMG_Set_Private_DWord"
 000Bh  "_CONFIGMG_Create_DevNode"
 000Ch  "_CONFIGMG_Query_Remove_SubTree"
 000Dh  "_CONFIGMG_Remove_SubTree"
 000Eh  "_CONFIGMG_Register_Device_Driver"
 000Fh  "_CONFIGMG_Register_Enumerator"
 0010h  "_CONFIGMG_Register_Arbitrator"
 0011h  "_CONFIGMG_Deregister_Arbitrator"
 0012h  "_CONFIGMG_Query_Arbitrator_Free_Size"
 0013h  "_CONFIGMG_Query_Arbitrator_Free_Data"
 0014h  "_CONFIGMG_Sort_NodeList"
 0015h  "_CONFIGMG_Yield"
 0016h  "_CONFIGMG_Lock"
 0017h  "_CONFIGMG_Unlock"
 0018h  "_CONFIGMG_Add_Empty_Log_Conf"
 0019h  "_CONFIGMG_Free_Log_Conf"
 001Ah  "_CONFIGMG_Get_First_Log_Conf"
 001Bh  "_CONFIGMG_Get_Next_Log_Conf"
 001Ch  "_CONFIGMG_Add_Res_Des"
 001Dh  "_CONFIGMG_Modify_Res_Des"
 001Eh  "_CONFIGMG_Free_Res_Des"
 001Fh  "_CONFIGMG_Get_Next_Res_Des"
 0020h  "_CONFIGMG_Get_Performance_Info"
 0021h  "_CONFIGMG_Get_Res_Des_Data_Size"
 0022h  "_CONFIGMG_Get_Res_Des_Data"
 0023h  "_CONFIGMG_Process_Events_Now"
 0024h  "_CONFIGMG_Create_Range_List"
 0025h  "_CONFIGMG_Add_Range"
 0026h  "_CONFIGMG_Delete_Range"
 0027h  "_CONFIGMG_Test_Range_Available"
 0028h  "_CONFIGMG_Dup_Range_List"
 0029h  "_CONFIGMG_Free_Range_List"
 002Ah  "_CONFIGMG_Invert_Range_List"
 002Bh  "_CONFIGMG_Intersect_Range_List"
 002Ch  "_CONFIGMG_First_Range"
 002Dh  "_CONFIGMG_Next_Range"
 002Eh  "_CONFIGMG_Dump_Range_List"
 002Fh  "_CONFIGMG_Load_DLVxDs"
 0030h  "_CONFIGMG_Get_DDBs"
 0031h  "_CONFIGMG_Get_CRC_CheckSum"
 0032h  "_CONFIGMG_Register_DevLoader"
 0033h  "_CONFIGMG_Reenumerate_DevNode"
 0034h  "_CONFIGMG_Setup_DevNode"
 0035h  "_CONFIGMG_Reset_Children_Marks"
 0036h  "_CONFIGMG_Get_DevNode_Status"
 0037h  "_CONFIGMG_Remove_Unmarked_Children"
 0038h  "_CONFIGMG_ISAPNP_To_CM"
 0039h  "_CONFIGMG_CallBack_Device_Driver"
 003Ah  "_CONFIGMG_CallBack_Enumerator"
 003Bh  "_CONFIGMG_Get_Alloc_Log_Conf"
 003Ch  "_CONFIGMG_Get_DevNode_Key_Size"
 003Dh  "_CONFIGMG_Get_DevNode_Key"
 003Eh  "_CONFIGMG_Read_Registry_Value"
 003Fh  "_CONFIGMG_Write_Registry_Value"
 0040h  "_CONFIGMG_Disable_DevNode"
 0041h  "_CONFIGMG_Enable_DevNode"
 0042h  "_CONFIGMG_Move_DevNode"
 0043h  "_CONFIGMG_Set_Bus_Info"
 0044h  "_CONFIGMG_Get_Bus_Info"
 0045h  "_CONFIGMG_Set_HW_Prof"
 0046h  "_CONFIGMG_Recompute_HW_Prof"
 0047h  "_CONFIGMG_Query_Change_HW_Prof"
 0048h  "_CONFIGMG_Get_Device_Driver_Private_DWord"
 0049h  "_CONFIGMG_Set_Device_Driver_Private_DWord"
 004Ah  "_CONFIGMG_Get_HW_Prof_Flags"
 004Bh  "_CONFIGMG_Set_HW_Prof_Flags"
 004Ch  "_CONFIGMG_Read_Registry_Log_Confs"
 004Dh  "_CONFIGMG_Run_Detection"
 004Eh  "_CONFIGMG_Call_At_Appy_Time"
 004Fh  "_CONFIGMG_Fail_Change_HW_Prof"
 0050h  "_CONFIGMG_Set_Private_Problem"
 0051h  "_CONFIGMG_Debug_DevNode"
 0052h  "_CONFIGMG_Get_Hardware_Profile_Info"
 0053h  "_CONFIGMG_Register_Enumerator_Function"
 0054h  "_CONFIGMG_Call_Enumerator_Function"
 0055h  "_CONFIGMG_Add_ID"
 0056h  "_CONFIGMG_Find_Range"
 0057h  "_CONFIGMG_Get_Global_State"
 0058h  "_CONFIGMG_Broadcast_Device_Change_Message"
 0059h  "_CONFIGMG_Call_DevNode_Handler"
 005Ah  "_CONFIGMG_Remove_Reinsert_All"
Note:   the VxD services appear to be identical to the PM/V86 APIs on
          INT 2F/AX=1684h
SeeAlso: #01296,#01299,INT 2F/AX=1684h/BX=0033h
--------W-20----Vx0034-----------------------
INT 20 P - Microsoft Windows - DWCFGMG.SYS - VxD SERVICES
        VxD = 0034h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01298)
Values for DWCFGMG.SYS (VxD ID 0034h) service number:
 00h    "CM_GetVersion" get supported DDI version
        Return: EAX = 00000000h if not installed
                else
                    AH = major version number
                    AL = minor version number
                    EBX = number of devices controlled by DWCFGMG.SYS
 01h    "CM_GetConfig" get device configuration
        EBX = device index
        EDI -> buffer for configuration information (see #02675)
        Return: EAX = status (0000h successful, 0001h index out of range)
 02h    "CM_LockConfig" lock device configuration
        EDI -> configuration information (see #02675)
        Return: EAX = status
                    0000h successful
                    0001h resource conflict
                    0002h invalid request
 03h    "CM_UnlockConfig" unlock device configuration
        EDI -> configuration information (see #02675)
        Return: EAX = status (0000h successful, 0001h invalid request)
 04h    "CME_QueryResources"
 05h    "CME_AllocResources"
 06h    "CME_DeallocResources"
SeeAlso: INT 2F/AX=1684h/BX=0034h
--------W-20----Vx0036-----------------------
INT 20 P - Microsoft Windows - VFBACKUP - VxD SERVICES
        VxD = 0036h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01299)
Values for VFBACKUP (VxD ID 0036h) service number:
 0000h  get version
        Return: CF clear
                EAX = version (AH = major, AL = minor)
 0001h  "VFBACKUP_Lock_NEC"
 0002h  "VFBACKUP_UnLock_NEC"
 0003h  "VFBACKUP_Register_NEC"
 0004h  "VFBACKUP_Register_VFD"
 0005h  "VFBACKUP_Lock_All_Ports"
SeeAlso: #01297,#01300
--------W-20----Vx0037-----------------------
INT 20 P - Microsoft Windows - VMINI / ENABLE - VxD SERVICES
        VxD = 0037h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01300)
Values for VMINI / ENABLE (VxD ID 0037h) service number:
 0000h  get version
        Return: CF clear
                EAX = version (AH = major, AL = minor)
 0001h  "VMINI_Update"
        ??? (performs VMMCall 1800Eh, then falls through to service 04h)
        Return: EAX = system time???
 0002h  "VMINI_Status"
        get current ???
        Return: EAX = ???
 0003h  "VMINI_DisplayError" (schedules a global event via VMMCall 1800Eh)
        Return: ???
 0004h  "VMINI_SetTimeStamp" (performs VMMCall 100CFh)
        Return: EAX = system time
 0005h  "VMINI_Siren" (call ??? priority event)
        Return: nothing
 0006h  "VMINI_RegisterAccess" (set ??? / get ???)
        EDI -> buffer containing data to copy into VxD and space for results
        Return: EDI buffer updated
 0007h  "VMINI_GetData"
        EBX = ??? flags (bits 2,15,17,18 checked)
        EDI -> ???
        ???
        Return: ???
 0008h  "VMINI_ShutDownItem" (schedules a global event via VMMCall 1800Eh)
        Return: ???
 0009h  "VMINI_RegisterSK" (get ??? data)
        EDI -> buffer for data (see #01301)
        Return: EDI buffer updated if large enough
SeeAlso: #01299,#01302,#02677 at INT 2F/AX=1684h/BX=0037h

Format of ENABLE.VXD ??? data:
Offset  Size    Description     (Table 01301)
 00h    DWORD   (ret) length of data, including this word
                (call) length of buffer
 04h    DWORD   -> 24-byte (or larger) buffer
 08h    DWORD   -> 20-byte buffer
 0Ch    DWORD   -> 260-byte buffer
 10h    DWORD   -> 260-byte buffer
SeeAlso: #01300
--------W-20----Vx0038-----------------------
INT 20 P - Microsoft Windows - VCOND - VxD SERVICES
        VxD = 0038h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01302)
Values for VCOND (VxD ID 0038h) service number:
 0000h  get VCOND version
        Return: CF clear
                EAX = version (AH = major, AL = minor)
 0001h  "VCOND_Launch_ConApp_Inherited"
SeeAlso: #01303,#01300,#01304

(Table 01303)
Values for Windows95 VCOND (Vxd ID 0038h) Win32 service number:
 00h    get VCOND version
        Return: EAX = version (AH = major, AL = minor)
 ...
 34h    ...last Win32 service for Windows95 SP1
SeeAlso: #01302
--------W-20----Vx003D-----------------------
INT 20 P - Microsoft Windows - BIOS - VxD SERVICES
        VxD = 003Dh
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01304)
Values for BIOS (VxD ID 003Dh) service number:
 00h    get version???
 01h    ???
 02h    ???
 03h    ???
SeeAlso: #01302,#01305
--------W-20----Vx003E-----------------------
INT 20 P - Microsoft Windows - WSOCK - VxD SERVICES
        VxD = 003Eh
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01305)
Values for WSOCK (VxD ID 003Eh) service number:
 00h    get WSOCK version
        Return: CF clear
                AH = major version
                AL = minor version
                EAX high word = 0000h
 01h    ???
        EAX = ??? or 00000000h
        Return: CF clear if successful
                    EAX = 00000000h
                CF set on error
                    EAX = ???
 02h    ???
        EAX = ??? or 00000000h
        Return: ???
 03h    ???
 04h    ...last service for Windows95 SP1
SeeAlso: #01304,#01306
--------W-20----Vx0040-----------------------
INT 20 P - Microsoft Windows - IFSMgr - VxD SERVICES
        VxD = 0040h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01306)
Values for IFSMGR (VxD ID 0040h) service number:
 00h    get version
 01h    "RegisterMount"
 02h    "RegisterNet"
 03h    "RegisterMailSlot"
 04h    "Attach"
 05h    "Detach"
 06h    "Get_NetTime"
 07h    "Get_DOSTime"
 08h    "SetupConnection"
 09h    "DerefConnection"
 0Ah    "ServerDOSCall"
 0Bh    "CompleteAsync"
 0Ch    "RegisterHeap"
 0Dh    "GetHeap"
 0Eh    "RetHeap"
 0Fh    "CheckHeap"
 10h    "CheckHeapItem"
 11h    "FillHeapSpare"
 12h    "Block"
 13h    "Wakeup"
 14h    "Yield"
 15h    "SchedEvent"
 16h    "QueueEvent"
 17h    "KillEvent"
 18h    "FreeIOReg"
 19h    "MakeMailSlot"
 1Ah    "DeleteMailSlot"
 1Bh    "WriteMailSlot"
 1Ch    "PopUp"
 1Dh    "printf"
 1Eh    "AssertFailed"
 1Fh    "LogEntry"
 20h    "DebugMenu"
 21h    "DebugVars"
 22h    "GetDebugString"
 23h    "GetDebugHexNum"
 24h    "NetFunction"
 25h    "DoDelAllUses"
 26h    "SetErrString"
 27h    "GetErrString"
 28h    "SetReqHook"
 29h    "SetPathHook"
 2Ah    "UseAdd"
 2Bh    "UseDel"
 2Ch    "InitUseAdd"
 2Dh    "ChangeDir"
 2Eh    "DelAllUses"
 2Fh    "CDROM_Attach"
 30h    "CDROM_Detach"
 31h    "Win32DupHandle"
 32h    "Ring0_FileIO"
 33h    "Toggle_Extended_File_Handle"
 34h    "IFSMgr_GetDrive_Info"
 35h    "IFSMgr_Ring0GetDriveInfo"
 36h    "IFSMgr_BlockNoEvents"
 37h    "IFSMgr_NetToDosTime"
 38h    "IFSMgr_DosToNetTime"
 39h    "IFSMgr_DosToWin32Time"
 3Ah    "IFSMgr_Win32ToDosTime"
 3Bh    "IFSMgr_NetToWin32Time"
 3Ch    "IFSMgr_Win32ToNetTime"
 3Dh    "IFSMgr_MetaMatch"
 3Eh    "IFSMgr_TransMatch"
 3Fh    "IFSMgr_CallProvider"
 40h    "UniToBCS"
 41h    "UniToBCSPath"
 42h    "BCSToUni"
 43h    "UniToUpper"
 44h    "UniCharToOEM"
 45h    "CreateBasis"
 46h    "MatchBasisName"
 47h    "AppendBasisTail"
 48h    "FcbToShort"
 49h    "ShortToFcb"
 4Ah    "IFSMgr_ParsePath"
 4Bh    "Query_PhysLock"
 4Ch    "_VolFlush"
 4Dh    "NotifyVolumeArrival"
 4Eh    "NotifyVolumeRemoval"
 4Fh    "QueryVolumeRemoval"
 50h    "IFSMgr_FSDUnmountCFSD"
 51h    "IFSMgr_GetConversionTablePtrs"
 52h    "IFSMgr_CheckAccessConflict"
 53h    "IFSMgr_LockFile"
 54h    "IFSMgr_UnlockFile"
 55h    "IFSMgr_RemoveLocks"
 56h    "IFSMgr_CheckLocks"
 57h    "IFSMgr_CountLocks"
 58h    "IFSMgr_ReassignLockFileInst"
 59h    "IFSMgr_UnassignLockList"
 5Ah    "IFSMgr_MountChildVolume"
 5Bh    "IFSMgr_UnmountChildVolume"
 5Ch    "IFSMgr_SwapDrives"
 5Dh    "IFSMgr_FSDMapFHtoIOREQ"
 5Eh    "IFSMgr_FSDParsePath"
 5Fh    "IFSMgr_FSDAttachSFT"
 60h    "IFSMgr_GetTimeZoneBias"
 61h    "IFSMgr_PNPEvent"
 62h    "IFSMgr_RegisterCFSD"
 63h    "IFSMgr_Win32MapExtendedHandleToSFT"
 64h    "IFSMgr_DbgSetFileHandleLimit"
 65h    "IFSMgr_Win32MapSFTToExtendedHandle"
 66h    "IFSMgr_FSDGetCurrentDrive"
 67h    "IFSMgr_InstallFileSystemApiHook"
 68h    "IFSMgr_RemoveFileSystemApiHook"
 69h    "IFSMgr_RunScheduledEvents"
 6Ah    "IFSMgr_CheckDelResource"
 6Bh    "IFSMgr_Win32GetVMCurdir"
 6Ch    "IFSMgr_SetupFailedConnection"
 6Dh    "_GetMappedErr"
 6Eh    "ShortToLossyFcb"
 6Fh    "IFSMgr_GetLockState"
 70h    "BcsToBcs"
 71h    "IFSMgr_SetLoopback"
 72h    "IFSMgr_ClearLoopback"
 73h    "IFSMgr_ParseOneElement"
 74h    "BcsToBcsUpper"
SeeAlso: #01305,#01307
--------W-20----Vx0041-----------------------
INT 20 P - Microsoft Windows - VCDFSD - VxD SERVICES
        VxD = 0041h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01307)
Values for VCDFSD (VxD ID 0041h) service number:
 00h    get VCDFSD version???
 01h    ???
 02h    ???
 03h    ???
SeeAlso: #01306,#01308
--------W-20----Vx0048-----------------------
INT 20 P - Microsoft Windows - PERF - VxD SERVICES
        VxD = 0048h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01308)
Values for PERF (VxD ID 0048h) service number:
 00h    get version
        Return: CF clear
                EAX = version (AH = major, AL = minor)
 01h    "PERF_Server_Register"
        (creates/sets a registry key for the server)
 02h    "PERF_Server_Deregister"
        end performance monitoring (deletes registry key for server)
 03h    "PERF_Server_Add_Stat"
        start performance monitoring (creates/sets a registry key)
 04h    "PERF_Server_Remove_Stat"
        end performance monitoring (deletes registry key)
SeeAlso: #01307,#01311,#01309
--------W-20----Vx004A-----------------------
INT 20 P - Microsoft Windows - MTRR - VxD SERVICES
        VxD = 004Ah
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01309)
Values for MTRR (VxD ID 004Ah) service number:
 00h    get version
 01h    ??? (highest service defined for Win95B)
SeeAlso: #01308,#01310
--------W-20----Vx004B-----------------------
INT 20 P - Microsoft Windows - NTKERN - VxD SERVICES
        VxD = 004Bh
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01310)
Values for NTKERN (VxD ID 004Bh) service number:
 00h    get version???
 ...
 08h    ??? (highest service defined for Win95B)
SeeAlso: #01309,#01311
--------W-20----Vx011F-----------------------
INT 20 P - Microsoft Windows - VFLATD - VxD SERVICES
        VxD = 011Fh
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01311)
Values for VFLATD (VxD ID 011Fh) service number:
 00h    get VFLATD version???
 01h    ???
SeeAlso: #01308,#01312
--------W-20----Vx0449-----------------------
INT 20 P - Microsoft Windows - vjoyd - VxD SERVICES
        VxD = 0449h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01312)
Values for vjoyd (VxD ID 0449h) service number:
 00h    get vjoyd version???
 01h    ???
SeeAlso: #01311,#01313
--------W-20----Vx044A-----------------------
INT 20 P - Microsoft Windows - mmdevldr - VxD SERVICES
        VxD = 044Ah
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01313)
Values for mmdevldr (VxD ID 044Ah) service number:
 00h    get mmdevldr version???
 01h    ???
 02h    ???
 03h    ???
 04h    ???
 05h    ???
SeeAlso: #01312,#01314
--------W-20----Vx0480-----------------------
INT 20 P - Microsoft Windows - VNetSup - VxD SERVICES
        VxD = 0480h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01314)
Values for VNetSup (VxD ID 0480h) service number:
 00h    get VNetSup version???
 01h    ???
 02h    ???
 03h    ???
 04h    ???
 05h    ???
 06h    ???
SeeAlso: #01313,#01315
--------W-20----Vx0481-----------------------
INT 20 P - Microsoft Windows - VREDIR - VxD SERVICES
        VxD = 0481h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01315)
Values for VREDIR (VxD ID 0481h) service number:
 0000h  "VRedir_Get_Version"
 0001h  "VRedir_Register"
 0002h  "VRedir_MakeMailSlot"
 0003h  "VRedir_DeleteMailSlot"
 0004h  "VRedir_ServerEnum"
 0010h  ...last service for Windows95 SP1
SeeAlso: #01314,#01316
--------W-20----Vx0483-----------------------
INT 20 P - Microsoft Windows - VSHARE - VxD SERVICES
        VxD = 0483h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01316)
Values for VSHARE (VxD ID 0483h) service number:
 00h    get VSHARE version???
SeeAlso: #01315,#01317
--------W-20----Vx0487-----------------------
INT 20 P - Microsoft Windows - NWLINK - VxD SERVICES
        VxD = 0487h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01317)
Values for NWLINK (VxD ID 0487h) service number:
 00h    get NWLINK version???
 01h    ???
 06h    ...last service for Windows95 SP1
SeeAlso: #01316,#01318,#02642
--------W-20----Vx0488-----------------------
INT 20 P - Microsoft Windows - VTDI - VxD SERVICES
        VxD = 0488h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01318)
Values for VTDI (VxD ID 0488h) service number:
 00h    get VTDI version???
 01h    ???
 08h    get ???
        seen called with DWORD -> ASCIZ "MSTCP" on stack, returning EAX=???
 0Dh    ...last service for Windows95 SP1
SeeAlso: #01317,#01319
--------W-20----Vx0489-----------------------
INT 20 P - Microsoft Windows - VIP - VxD SERVICES
        VxD = 0489h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01319)
Values for VIP (VxD ID 0489h) service number:
 00h    get VIP version???
 01h    ???
 05h    ???
 06h    ???
        returns EAX=0/1
 08h    ...last service for Windows95 SP1
---Frontier Technologies' FTCVIP---
 09h    ???
        returns EAX=1
SeeAlso: #01318,#01320
--------W-20----Vx048A-----------------------
INT 20 P - Microsoft Windows - MSTCP - VxD SERVICES
        VxD = 048Ah
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01320)
Values for MSTCP (VxD ID 048Ah) service number:
 00h    get MSTCP version???
SeeAlso: #01319,#01321
--------W-20----Vx048B-----------------------
INT 20 P - Microsoft Windows - VCACHE - VxD SERVICES
        VxD = 048Bh
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01321)
Values for VCACHE (VxD ID 048Bh) service number:
 0000h  "VCACHE_Get_Version"
 0001h  "VCACHE_Register"
 0002h  "VCACHE_GetSize"
 0003h  "VCACHE_CheckAvail"
 0004h  "VCACHE_FindBlock"
 0005h  "VCACHE_FreeBlock"
 0006h  "VCACHE_MakeMRU"
 0007h  "VCACHE_Hold"
 0008h  "VCACHE_Unhold"
 0009h  "VCACHE_Enum"
 000Ah  "VCACHE_TestHandle"
 000Bh  "VCACHE_VerifySums"
 000Ch  "VCACHE_RecalcSums"
 000Dh  "VCACHE_TestHold"
 000Eh  "VCACHE_GetStats"
 000Fh  "VCache_Deregister"
 0010h  "VCache_AdjustMinimum"
 0011h  "VCache_SwapBuffers"
 0012h  "VCache_RelinquishPage"
 0013h  "VCache_UseThisPage"
 0014h  "_VCache_CreateLookupCache"
 0015h  "_VCache_CloseLookupCache"
 0016h  "_VCache_DeleteLookupCache"
 0017h  "_VCache_Lookup"
 0018h  "_VCache_UpdateLookup"
SeeAlso: #01320,#01322
--------W-20----Vx048E-----------------------
INT 20 P - Microsoft Windows - NWREDIR - VxD SERVICES
        VxD = 048Eh
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01322)
Values for NWREDIR (VxD ID 048Eh) service number:
 00h    get NWREDIR version???
 01h    ???
SeeAlso: #01321,#01323
--------W-20----Vx0491-----------------------
INT 20 P - Microsoft Windows - FILESEC - VxD SERVICES
        VxD = 0491h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01323)
Values for FILESEC (VxD ID 0491h) service number:
 00h    get FILESEC version???
 01h    ???
 10h    ...last service for Windows95 SP1
SeeAlso: #01322,#01324
--------W-20----Vx0492-----------------------
INT 20 P - Microsoft Windows - NWSERVER - VxD SERVICES
        VxD = 0492h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01324)
Values for NWSERVER (VxD ID 0492h) service number:
 00h    get NWSERVER version???
 01h    ???
 02h    ???
 03h    ???
SeeAlso: #01323,#01325
--------W-20----Vx0493-----------------------
INT 20 P - Microsoft Windows - MSSP / NWSP - VxD SERVICES
        VxD = 0493h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01325)
Values for MSSP/NWSP (VxD ID 0493h) service number:
 00h    get NSSP / NWSP version???
 01h    ???
 06h    ...last service for Windows95 SP1
SeeAlso: #01324,#01326
--------W-20----Vx0494-----------------------
INT 20 P - Microsoft Windows - NSCL - VxD SERVICES
        VxD = 0494h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01326)
Values for NSCL (VxD ID 0494h)  service number:
 00h    get NSCL version???
 01h    ???
 02h    ???
SeeAlso: #01325,#01327
--------W-20----Vx0495-----------------------
INT 20 P - Microsoft Windows - AFVXD - VxD SERVICES
        VxD = 0495h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01327)
Values for AFVXD (VxD ID 0495h) service number:
 00h    get version
        Return: CF clear
                AX = version (AH = high, AL = low)
 01h    ???
        EAX -> ???
        EBX -> ???
        ECX = ???
        Return: ???
 02h    ???
        EAX -> ???
        Return: ???
SeeAlso: #01326,#01328
--------W-20----Vx0496-----------------------
INT 20 P - Microsoft Windows - NDIS2SUP - VxD SERVICES
        VxD = 0496h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier (see #02642)
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01328)
Values for NDIS2SUP (VxD ID 0496h) service number:
 00h    get NDIS2SUP version???
 01h    ???
SeeAlso: #01327,#01329
--------W-20----Vx0498-----------------------
INT 20 P - Microsoft Windows - Splitter - VxD SERVICES
        VxD = 0498h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier (see #02642)
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01329)
Values for Splitter (VxD ID 0498h) service number:
 00h    get Splitter version
        Return: CF clear
                EAX = version (00000001h)
 01h    ???
 02h    ???
 03h    hook/unhook VMM "hook device service" service
        EAX = request (0 = unhook, nonzero = hook)
        Return: if EAX nonzero on entry, Splitter's service 04h replaces VMM
                  service 0090h; otherwise, default handler is restored
 04h    Splitter "hook device service" handler
SeeAlso: #01328,#01330
--------W-20----Vx0499-----------------------
INT 20 P - Microsoft Windows - PPPMAC - VxD SERVICES
        VxD = 0499h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier (see #02642)
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01330)
Values for PPPMAC (VxD ID 0499h) service number:
 00h    ???
 09h    ...last service for Windows95 SP1
SeeAlso: #01329,#01331,#02642
--------W-20----Vx049A-----------------------
INT 20 P - Microsoft Windows - VDHCP - VxD SERVICES
        VxD = 049Ah
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier (see #02642)
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01331)
Values for VDHCP (VxD ID 049Ah) service number:
 00h    get VDHCP version???
 01h    ???
 02h    ???
 03h    ???
SeeAlso: #01330,#01332
--------W-20----Vx049B-----------------------
INT 20 P - Microsoft Windows - VNBT - VxD SERVICES
        VxD = 049Bh
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier (see #02642)
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01332)
Values for VNBT (VxD ID 049Bh) service number:
 00h    get VNBT version???
SeeAlso: #01331,#01333
--------W-20----Vx049D-----------------------
INT 20 P - Microsoft Windows - LOGGER - VxD SERVICES
        VxD = 049Dh
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier (see #02642)
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01333)
Values for LOGGER (VxD ID 049Dh) service number:
 00h    get LOGGER version???
 01h    ???
 02h    ???
 03h    ???
 04h    ???
SeeAlso: #01332,#01334
--------W-20----Vx097C-----------------------
INT 20 P - Microsoft Windows - PCCARD - VxD SERVICES
        VxD = 097Ch
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier (see #02642)
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01334,#01340

(Table 01334)
Values for PCCARD (VxD ID 097Ch) service number:
 0000h  "PCCARD_Get_Version"
 0001h  "PCCARD_Card_Services"
SeeAlso: #01333,#01337
----------20----Vx3048-----------------------
INT 20 P - Frontier Technologies ??? - VxD SERVICES
        VxD = 3048h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01335

(Table 01335)
Values for ??? (VxD ID 3048h) service number:
 00h    get version???
 03h    ???
        called with 5 DWORDs on stack, returns EAX=???, ECX nonzero on error
 04h    ???
        called with DWORD on stack, returns EAX=???, ECX nonzero on error
 06h    ???
        called with DWORD on stack, returns EAX=???, ECX nonzero on error
 07h    ???
        called with 3 DWORDs on stack, returns EAX=???, ECX nonzero on error
 0Bh    ???
        called with 2 DWORDs on stack, returns EAX=???, ECX nonzero on error
 0Ch    ???
        called with 2 DWORDs on stack, returns EAX=???, ECX nonzero on error
 0Dh    ???
        called with 6 DWORDs on stack, returns EAX=???, ECX nonzero on error
 1Ah    ???
        called with 3 DWORDs on stack
SeeAlso: #01336
----------20----Vx3049-----------------------
INT 20 P - Frontier Technologies ??? - VxD SERVICES
        VxD = 3049h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01336

(Table 01336)
Values for ??? (VxD ID 3049h) service number:
 00h    get version???
 1Dh    ???
        called with 2 DWORDs on stack; returns EAX=???, ECX nonzero on error
 1Eh    ???
        called with 6 DWORDs on stack; returns EAX=???, ECX nonzero on error
SeeAlso: #01335
--------W-20----Vx3098-----------------------
INT 20 P - QEMM - VstlthD - VxD SERVICES
        VxD = 3098h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01337)
Values for VStlthD (VxD ID 3098h) service number:
 00h    get version
        Return: CF clear
                EAX = version (AH = major, AL = BCD minor)
 01h    ???
 02h    get current ???
        Return: CF clear
                EDX = current value of ???
 03h    ???
SeeAlso: #01334,#01338
--------W-20----Vx30F6-----------------------
INT 20 P - Microsoft Windows - WSVV - VxD SERVICES
        VxD = 30F6h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01338)
Values for WSVV (VxD ID 30F6h) service number:
 00h    get WSVV version???
SeeAlso: #01337,#01339
--------W-20----Vx33FC-----------------------
INT 20 P - Microsoft Windows - APSIENUM - VxD SERVICES
        VxD = 33FCh
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01339)
Values for ASPIENUM (VxD ID 33FCh) service number:
 00h    get ASPIENUM version???
 01h    ???
 02h    ???
 03h    ???
SeeAlso: #01338,#01340
--------W-20----Vx357E-----------------------
INT 20 P - Microsoft Windows - DSOUND - VxD SERVICES
        VxD = 357Eh
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01340)
Values for DSOUND (VxD ID 357Eh) service number:
 00h    get DSOUND version???
 01h    ???
 02h    ???
SeeAlso: #01339,#01341
--------W-20----Vx39E6-----------------------
INT 20 P - Microsoft Windows - A3D - VxD SERVICES
        VxD = 39E6h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340


(Table 01341)
Values for A3D (VxD ID 39E6h) service number:
 00h    get version???
 01h    ???
 02h    ??? (highest service defined)
SeeAlso: #01340,#01342
--------W-20----Vx3BFD-----------------------
INT 20 P - Microsoft Windows - CWCPROXY - VxD SERVICES
        VxD = 3BFDh
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01342)
Values for CWCPROXY (VxD ID 3BFDh) service number:
 00h    get version???
 ...
 03h    ??? (highest service defined)
SeeAlso: #01341,#01343
--------W-20----Vx3C78-----------------------
INT 20 P - Microsoft Windows - VGARTD - VxD SERVICES
        VxD = 3C78h
Note:   the desired VxD and service number are identified by the data
          immediately following the INT 20 instruction, as in:
                INT     20h
                DW      service number
                DW      VxD identifier
SeeAlso: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#01265,#01340

(Table 01343)
Values for VGARTD (VxD ID 3C78h) service number:
 00h    get version???
 ...
 05h    ??? (highest service defined)
SeeAlso: #01342,#02642
--------G-21---------------------------------
INT 21 - COMTROL HOSTESS i/ISA DEBUGGER - GET SEGMENT FOR CONTROL PROGRAM USE
        ???
Return: AX = first segment available for control program use
SeeAlso: INT 20"COMTROL",INT 22"COMTROL"
--------D-2100-------------------------------
INT 21 - DOS 1+ - TERMINATE PROGRAM
        AH = 00h
        CS = PSP segment
Notes:  Microsoft recommends using INT 21/AH=4Ch for DOS 2+
        this function sets the program's return code (ERRORLEVEL) to 00h
        execution continues at the address stored in INT 22 after DOS performs
          whatever cleanup it needs to do (restoring the INT 22,INT 23,INT 24
          vectors from the PSP assumed to be located at offset 0000h in the
          segment indicated by the stack copy of CS, etc.)
        if the PSP is its own parent, the process's memory is not freed; if
          INT 22 additionally points into the terminating program, the
          process is effectively NOT terminated
        not supported by MS Windows 3.0 DOSX.EXE DOS extender
SeeAlso: AH=26h,AH=31h,AH=4Ch,INT 20,INT 22
--------D-2101-------------------------------
INT 21 - DOS 1+ - READ CHARACTER FROM STANDARD INPUT, WITH ECHO
        AH = 01h
Return: AL = character read
Notes:  ^C/^Break are checked, and INT 23 executed if read
        ^P toggles the DOS-internal echo-to-printer flag
        ^Z is not interpreted, thus not causing an EOF if input is redirected
        character is echoed to standard output
        standard input is always the keyboard and standard output the screen
          under DOS 1.x, but they may be redirected under DOS 2+
SeeAlso: AH=06h,AH=07h,AH=08h,AH=0Ah
--------v-21010F-----------------------------
INT 21 - VIRUS - "Susan" - INSTALLATION CHECK
        AX = 010Fh
Return: AX = 7553h ("Su") if resident
SeeAlso: INT 16/AH=DDh"VIRUS",INT 21/AX=0B56h
--------D-2102-------------------------------
INT 21 - DOS 1+ - WRITE CHARACTER TO STANDARD OUTPUT
        AH = 02h
        DL = character to write
Return: AL = last character output (despite the official docs which state
                nothing is returned) (at least DOS 2.1-7.0)
Notes:  ^C/^Break are checked, and INT 23 executed if pressed
        standard output is always the screen under DOS 1.x, but may be
          redirected under DOS 2+
        the last character output will be the character in DL unless DL=09h
          on entry, in which case AL=20h as tabs are expanded to blanks
        if standard output is redirected to a file, no error checks (write-
          protected, full media, etc.) are performed
SeeAlso: AH=06h,AH=09h
--------D-2103-------------------------------
INT 21 - DOS 1+ - READ CHARACTER FROM STDAUX
        AH = 03h
Return: AL = character read
Notes:  keyboard checked for ^C/^Break, and INT 23 executed if detected
        STDAUX is usually the first serial port
SeeAlso: AH=04h,INT 14/AH=02h,INT E0/CL=03h
--------D-2104-------------------------------
INT 21 - DOS 1+ - WRITE CHARACTER TO STDAUX
        AH = 04h
        DL = character to write
Notes:  keyboard checked for ^C/^Break, and INT 23 executed if detected
        STDAUX is usually the first serial port
        if STDAUX is busy, this function will wait until it becomes free
SeeAlso: AH=03h,INT 14/AH=01h,INT E0/CL=04h
--------D-2105-------------------------------
INT 21 - DOS 1+ - WRITE CHARACTER TO PRINTER
        AH = 05h
        DL = character to print
Notes:  keyboard checked for ^C/^Break, and INT 23 executed if detected
        STDPRN is usually the first parallel port, but may be redirected under
          DOS 2+
        if the printer is busy, this function will wait
SeeAlso: INT 17/AH=00h
--------D-2106-------------------------------
INT 21 - DOS 1+ - DIRECT CONSOLE OUTPUT
        AH = 06h
        DL = character (except FFh)
Return: AL = character output (despite official docs which state nothing is
                returned) (at least DOS 2.1-7.0)
Notes:  does not check ^C/^Break
        writes to standard output, which is always the screen under DOS 1.x,
          but may be redirected under DOS 2+
SeeAlso: AH=02h,AH=09h
--------D-2106--DLFF-------------------------
INT 21 - DOS 1+ - DIRECT CONSOLE INPUT
        AH = 06h
        DL = FFh
Return: ZF set if no character available
            AL = 00h
        ZF clear if character available
            AL = character read
Notes:  ^C/^Break are NOT checked
        if the returned character is 00h, the user pressed a key with an
          extended keycode, which will be returned by the next call of this
          function
        this function reads from standard input, which is always the keyboard
          under DOS 1.x, but may be redirected under DOS 2+
        although the return of AL=00h when no characters are available is not
          documented, some programs rely on this behavior
SeeAlso: AH=0Bh
--------D-2107-------------------------------
INT 21 - DOS 1+ - DIRECT CHARACTER INPUT, WITHOUT ECHO
        AH = 07h
Return: AL = character read from standard input
Notes:  does not check ^C/^Break
        standard input is always the keyboard under DOS 1.x, but may be
          redirected under DOS 2+
        if the interim console flag is set (see AX=6301h), partially-formed
          double-byte characters may be returned
SeeAlso: AH=01h,AH=06h,AH=08h,AH=0Ah
--------D-2108-------------------------------
INT 21 - DOS 1+ - CHARACTER INPUT WITHOUT ECHO
        AH = 08h
Return: AL = character read from standard input
Notes:  ^C/^Break are checked, and INT 23 executed if detected
        standard input is always the keyboard under DOS 1.x, but may be
          redirected under DOS 2+
        if the interim console flag is set (see AX=6301h), partially-formed
          double-byte characters may be returned
SeeAlso: AH=01h,AH=06h,AH=07h,AH=0Ah,AH=64h"DOS 3.2+"
--------D-2109-------------------------------
INT 21 - DOS 1+ - WRITE STRING TO STANDARD OUTPUT
        AH = 09h
        DS:DX -> '$'-terminated string
Return: AL = 24h (the '$' terminating the string, despite official docs which
                state that nothing is returned) (at least DOS 2.1-7.0 and
                NWDOS)
Notes:  ^C/^Break are checked, and INT 23 is called if either pressed
        standard output is always the screen under DOS 1.x, but may be
          redirected under DOS 2+
        under the FlashTek X-32 DOS extender, the pointer is in DS:EDX
SeeAlso: AH=02h,AH=06h"OUTPUT"
--------D-210A-------------------------------
INT 21 - DOS 1+ - BUFFERED INPUT
        AH = 0Ah
        DS:DX -> buffer (see #01344)
Return: buffer filled with user input
Notes:  ^C/^Break are checked, and INT 23 is called if either detected
        reads from standard input, which may be redirected under DOS 2+
        if the maximum buffer size (see #01344) is set to 00h, this call returns
          immediately without reading any input
SeeAlso: AH=0Ch,INT 2F/AX=4810h

Format of DOS input buffer:
Offset  Size    Description     (Table 01344)
 00h    BYTE    maximum characters buffer can hold
 01h    BYTE    (call) number of chars from last input which may be recalled
                (ret) number of characters actually read, excluding CR
 02h  N BYTEs   actual characters read, including the final carriage return
--------K-210A00-----------------------------
INT 21 - WCED v1.6+ - INSTALLATION CHECK
        AX = 0A00h
        DS:DX -> 6-byte buffer whose first two bytes must be 00h
Return: buffer offset 02h-05h filled with "Wced" if installed
Program: WCED is a free command-line editor and history utility by Stuart
          Russell
SeeAlso: AH=FFh"CED"
--------D-210B-------------------------------
INT 21 - DOS 1+ - GET STDIN STATUS
        AH = 0Bh
Return: AL = status
            00h if no character available
            FFh if character is available
Notes:  ^C/^Break are checked, and INT 23 is called if either pressed
        standard input is always the keyboard under DOS 1.x, but may be
          redirected under DOS 2+
        if the interim console flag is set (see AX=6301h), this function
          returns AL=FFh if a partially-formed double-byte character is
          available
SeeAlso: AH=06h"INPUT",AX=4406h
--------v-210B56-----------------------------
INT 21 - VIRUS - "Perfume" - INSTALLATION CHECK
        AX = 0B56h
Return: AX = 4952h if resident
SeeAlso: AX=0D20h,INT 12/AX=4350h/BX=4920h,INT 13/AH=F2h,INT 21/AX=010Fh
--------D-210C-------------------------------
INT 21 - DOS 1+ - FLUSH BUFFER AND READ STANDARD INPUT
        AH = 0Ch
        AL = STDIN input function to execute after flushing buffer
        other registers as appropriate for the input function
Return: as appropriate for the specified input function
Note:   if AL is not one of 01h,06h,07h,08h, or 0Ah, the buffer is flushed but
          no input is attempted
SeeAlso: AH=01h,AH=06h"INPUT",AH=07h,AH=08h,AH=0Ah
--------D-210D-------------------------------
INT 21 - DOS 1+ - DISK RESET
        AH = 0Dh
Return: (DOS 6 only) CF clear (earlier versions preserve CF)
Notes:  This function writes all modified disk buffers to disk, but does not
          update the directory information (that is only done when files are
          closed or a SYNC call is issued)
SeeAlso: AX=5D01h,AX=710Dh,INT 13/AH=00h,INT 2F/AX=1120h
--------v-210D20-----------------------------
INT 21 - VIRUS - "Crazy Imp" - INSTALLATION CHECK
        AX = 0D20h
Return: AX = 1971h if resident
SeeAlso: AX=0B56h,AX=1812h,AX=2C2Ch,AX=710Dh,AH=30h/DX=ABCDh
--------D-210E-------------------------------
INT 21 - DOS 1+ - SELECT DEFAULT DRIVE
        AH = 0Eh
        DL = new default drive (00h = A:, 01h = B:, etc)
Return: AL = number of potentially valid drive letters
Notes:  under Novell NetWare, the return value is always 32, the number of
          drives that NetWare supports
        under DOS 3.0+, the return value is the greatest of 5, the value of
          LASTDRIVE= in CONFIG.SYS, and the number of drives actually present
        on a DOS 1.x/2.x single-floppy system, AL returns 2 since the floppy
          may be accessed as either A: or B:
        otherwise, the return value is the highest drive actually present
        DOS 1.x supports a maximum of 16 drives, 2.x a maximum of 63 drives,
          and 3+ a maximum of 26 drives
        under Novell DOS 7, this function returns the correct LASTDRIVE value
          even when the undocumented LASTDRIVE=27..32 directive was used in
          CONFIG.SYS
        "parse FCB" (see AH=29h) can be used to determine whether a drive
          letter is valid
SeeAlso: AH=19h,AH=3Bh,AH=DBh
--------v-210E--DLAD-------------------------
INT 21 U - Novell DOS 7 - SDRes v27.03 - INSTALLATION CHECK
        AH = 0Eh
        DL = ADh
Return: AL = BAh if installed
Program: SDRes is the resident portion of the Search&Destroy antiviral by
          Fifth Generation Systems, as bundled with Novell DOS 7
Note:   SDRes will terminate programs which test for the presence of viruses
          using interrupt-based installation calls, saying that the program
          may be infected
SeeAlso: AH=0Eh/DL=AEh,AH=0Eh/DL=AFh,AH=4Ah/BX=00B6h,INT 13/AX=A759h
--------v-210E--DLAE-------------------------
INT 21 U - Novell DOS 7 - SDRes v27.03 - CLEAR ??? FLAG
        AH = 0Eh
        DL = AEh
SeeAlso: AH=0Eh/DL=ADh,AH=0Eh/DL=AFh,INT 13/AX=A759h
--------v-210E--DLAF-------------------------
INT 21 U - Novell DOS 7 - SDRes v27.03 - SET ??? FLAG
        AH = 0Eh
        DL = AFh
SeeAlso: AH=0Eh/DL=ADh,AH=0Eh/DL=AEh,INT 13/AX=A759h
--------D-210F-------------------------------
INT 21 - DOS 1+ - OPEN FILE USING FCB
        AH = 0Fh
        DS:DX -> unopened File Control Block (see #01345,#01346)
Return: AL = status
            00h successful
            FFh file not found or access denied
Notes:  (DOS 3.1+) file opened for read/write in compatibility mode
        an unopened FCB has the drive, filename, and extension fields filled
          in and all other bytes cleared
        not supported by MS Windows 3.0 DOSX.EXE DOS extender
        DR DOS checks password attached with AX=4303h
        (FAT32 drive) this function will only succeed for creating a volume
          label; FAT32 does not support FCBs for file I/O
BUG:    APPEND for DOS 3.3+ corrupts DX if the file is not found
SeeAlso: AH=10h,AH=16h,AH=3Dh,AX=4303h

Format of File Control Block:
Offset  Size    Description     (Table 01345)
 00h    BYTE    drive number (0 = default, 1 = A, etc)
                FFh is not allowed (signals extended FCB, see #01346)
 01h  8 BYTEs   blank-padded file name
 09h  3 BYTEs   blank-padded file extension
 0Ch    WORD    current block number
 0Eh    WORD    logical record size
 10h    DWORD   file size
 14h    WORD    date of last write (see #01666 at AX=5700h)
 16h    WORD    time of last write (see #01665 at AX=5700h) (DOS 1.1+)
 18h  8 BYTEs   reserved (see #01347,#01348,#01349,#01350,#01351)
 20h    BYTE    record within current block
 21h    DWORD   random access record number (if record size is > 64 bytes, high
                  byte is omitted)
SeeAlso: #01346

Format of Extended File Control Block (XFCB):
Offset  Size    Description     (Table 01346)
 00h    BYTE    FFh signature for extended FCB
 01h  5 BYTEs   reserved
 06h    BYTE    file attribute if extended FCB
 07h 36 BYTEs   standard FCB (all offsets are shifted by seven bytes)
SeeAlso: #01246

Format of FCB reserved field for DOS 1.0:
Offset  Size    Description     (Table 01347)
 16h    WORD    location in directory (if high byte = FFh, low byte is device
                  ID)
 18h    WORD    number of first cluster in file
 1Ah    WORD    current absolute cluster number on disk
 1Ch    WORD    current relative cluster number within file
                (0 = first cluster of file, 1 = second cluster, etc.)
 1Eh    BYTE    dirty flag (00h = not dirty)
 1Fh    BYTE    unused

Format of FCB reserved field for DOS 1.10-1.25:
Offset  Size    Description     (Table 01348)
 18h    BYTE    bit 7: set if logical device
                bit 6: not dirty
                bits 5-0: disk number or logical device ID
 19h    WORD    starting cluster number on disk
 1Bh    WORD    current absolute cluster number on disk
 1Dh    WORD    current relative cluster number within file
 1Fh    BYTE    unused

Format of FCB reserved field for DOS 2.x:
Offset  Size    Description     (Table 01349)
 18h    BYTE    bit 7: set if logical device
                bit 6: set if open???
                bits 5-0: ???
 19h    WORD    starting cluster number on disk
 1Bh    WORD    ???
 1Dh    BYTE    ???
 1Eh    BYTE    ???
 1Fh    BYTE    ???

Format of FCB reserved field for DOS 3.x:
Offset  Size    Description     (Table 01350)
 18h    BYTE    number of system file table entry for file
 19h    BYTE    attributes
                bits 7,6: 00 = SHARE.EXE not loaded, disk file
                          01 = SHARE.EXE not loaded, character device
                          10 = SHARE.EXE loaded, remote file
                          11 = SHARE.EXE loaded, local file or device
                bits 5-0: low six bits of device attribute word
---SHARE.EXE loaded, local file---
 1Ah    WORD    starting cluster of file on disk
 1Ch    WORD    (DOS 3.x) offset within SHARE of sharing record
                  (see #01637 at AH=52h)
 1Eh    BYTE    file attribute
 1Fh    BYTE    ???
---SHARE.EXE loaded, remote file---
 1Ah    WORD    number of sector containing directory entry (see #01352)
 1Ch    WORD    relative cluster within file of last cluster accessed
 1Eh    BYTE    absolute cluster number of last cluster accessed
 1Fh    BYTE    ???
---SHARE.EXE not loaded---
 1Ah    BYTE    (low byte of device attribute word AND 0Ch) OR open mode
 1Bh    WORD    starting cluster of file
 1Dh    WORD    number of sector containing directory entry (see #01352)
 1Fh    BYTE    number of directory entry within sector
Note:   if FCB opened on character device, DWORD at 1Ah is set to the address
          of the device driver header, then the BYTE at 1Ah is overwritten.
SeeAlso: #01646

Format of FCB reserved field for DOS 5.0:
Offset  Size    Description     (Table 01351)
 18h    BYTE    number of system file table entry for file
 19h    BYTE    attributes
                bits 7,6: 00 = SHARE.EXE not loaded, disk file
                          01 = SHARE.EXE not loaded, character device
                          10 = SHARE.EXE loaded, remote file
                          11 = SHARE.EXE loaded, local file or device
                bits 5-0: low six bits of device attribute word
---SHARE.EXE loaded, local file---
 1Ah    WORD    starting cluster of file on disk
 1Ch    WORD    unique sequence number of sharing record
 1Eh    BYTE    file attributes
 1Fh    BYTE    unused???
---SHARE.EXE loaded, remote file---
 1Ah    WORD    network handle
 1Ch    DWORD   network ID
---SHARE not loaded, local device---
 1Ah    DWORD   pointer to device driver header (see #01646)
 1Eh  2 BYTEs   unused???
---SHARE not loaded, local file---
 1Ah    BYTE    extra info
                bit 7: read-only attribute from SFT
                bit 6: archive attribute from SFT
                bits 5-0: high bits of sector number
 1Bh    WORD    starting cluster of file
 1Dh    WORD    low word of sector number containing directory entry
                (see #01352)
 1Fh    BYTE    number of directory entry within sector
--------D-2110-------------------------------
INT 21 - DOS 1+ - CLOSE FILE USING FCB
        AH = 10h
        DS:DX -> File Control Block (see #01345)
Return: AL = status
            00h successful
            FFh failed
Notes:  a successful close forces all disk buffers used by the file to be
          written and the directory entry to be updated
        not supported by MS Windows 3.0 DOSX.EXE DOS extender
SeeAlso: AH=0Fh,AH=16h,AH=3Eh
--------D-2111-------------------------------
INT 21 - DOS 1+ - FIND FIRST MATCHING FILE USING FCB
        AH = 11h
        DS:DX -> unopened FCB (see #01345), may contain '?' wildcards
Return: AL = status
            00h successful
                [DTA] unopened FCB for first matching file
            FFh no matching filename, or bad FCB
Notes:  the type of the returned FCB depends on whether the input FCB was a
          normal or an extended FCB
        the data returned in the DTA (disk transfer area) is actually the
          drive number (or extended FCB header and drive number) followed by
          the file's directory entry (see #01352); this format happens to be
          compatible with an unopened FCB
        for extended FCBs with search attribute 08h, the volume label (if any)
          will be returned even if the current directory is not the root dir.
        DOS 3.0+ also allows the '*' wildcard
        the search FCB at DS:DX must not be modified if AH=12h will be used to
          continue searching; DOS 3.3 has set the following parts of the FCB:
                 0Ch    BYTE    ???
                 0Dh    WORD    directory entry number of matching file
                 0Fh    WORD    cluster number of current directory
                 11h  4 BYTEs   ???
                 15h    BYTE    drive number (1=A:)
        this function is used by many copy protection schemes to obtain the
          starting cluster of a file
BUG:    under Windows95, if a .EXE program ("MZ" header) rather than a true
          .COM calls this function from a DOS box, the ten bytes of the
          directory entry from 0Ch to 15h may be filled with zeros rather than
          the additional file times
SeeAlso: AH=12h,AH=1Ah,AH=4Eh,INT 2F/AX=111Bh

Format of DOS directory entry:
Offset  Size    Description     (Table 01352)
 00h  8 BYTEs   blank-padded filename
                first character is set to E5h for deleted files (05h for
                  pending delete files under Novell DOS / OpenDOS)
 08h  3 BYTEs   blank-padded file extension
 0Bh    BYTE    attributes
 0Ch 10 BYTEs   (MS-DOS 1.0-6.22) reserved
                (DR DOS) used to store file password / owner (see #01354)
                        (see also INT 21/AX=4302h)
                (Novell DOS 7) DELWATCH data (see #01354)
                (MS-DOS 7/Windows95) additional file times (see #01353)
 16h    WORD    time of creation or last update (see #01665 at AX=5700h)
 18h    WORD    date of creation or last update (see #01666 at AX=5700h)
 1Ah    WORD    starting cluster number (see also AX=440Dh/CX=0871h)
                (may not be set in INT 21/AH=11h return data for FAT32 drives)
 1Ch    DWORD   file size
SeeAlso: #01355,#02628,#02629

Format of MS-DOS 7/Windows95 additional file times:
Offset  Size    Description     (Table 01353)
 00h    BYTE    reserved
 01h    BYTE    10-millisecond units past creation time below
 02h    WORD    file creation time
 04h    WORD    file creation date
 06h    WORD    last-access date
 08h    WORD    (FAT32) high word of starting cluster number
Note:   this data is stored beginning at offset 0Ch in a standard directory
          entry
SeeAlso: #01352

Format of DR DOS 6/Novell DOS 7 additional file information:
Offset  Size    Description     (Table 01354)
 0Ch    BYTE    reserved (00h)
 0Dh    BYTE    first character of original filename for deleted file
 0Eh    WORD    encrypted file/directory password
 10h    WORD    reserved (00h)
                (Novell DOS 7 DELWATCH) original file time
                    cleared when file is undeleted or purged
 12h    WORD    (DR DOS 6) file owner ID
                (Novell DOS 7 DELWATCH) original file date
                    cleared when file is undeleted or purged
 14h    WORD    single/multiuser file/directory access rights (see AX=4302h)
---deleted files---
 16h    WORD    (Novell DOS 7 DELWATCH) time of deletion
 18h    WORD    (Novell DOS 7 DELWATCH) date of deletion
Note:   offsets are within the full directory entry
SeeAlso: #01352

Format of MS-DOS 7/Windows95 long-filename directory entry:
Offset  Size    Description     (Table 01355)
 00h    BYTE    LFN record sequence and flags
                bits 5-0: sequence number
                bit 6: set if last long-filename record for file
                bit 7: set if file deleted
 01h 10 BYTEs   long filename, first part
 0Bh    BYTE    0Fh (otherwise impossible file attribute, used as signature)
 0Ch    BYTE    reserved??? (00h)
 0Dh    BYTE    checksum for short filename
 0Eh 12 BYTEs   long filename, second part
 1Ah    WORD    first cluster number (always 0000h for LFN records)
 1Ch  4 BYTEs   long filename, third part
Notes:  long-filename entries are always stored in the directory just prior
          to the short-name entry for a file
        multiple LFN records are used if the long filename does not fit into
          a single record
        the short-filename checksum byte is computed by adding up the
          eleven bytes of the short filename, rotating the intermediate
          sum right one bit before adding the next character
        the long filename is encoded as 16-bit Unicode characters; for most
          filenames, this appears in the directory as the ASCII character
          followed by 00h
SeeAlso: #01352,INT 21/AX=5704h,INT 21/AH=71h
--------D-2112-------------------------------
INT 21 - DOS 1+ - FIND NEXT MATCHING FILE USING FCB
        AH = 12h
        DS:DX -> unopened FCB (see #01345)
Return: AL = status
            00h successful
                Disk Transfer Area filled with unopened FCB
            FFh no more matching filenames
Note:   (see AH=11h)
        assumes that successful FindFirst executed on search FCB before call
SeeAlso: AH=1Ah,AH=4Fh,INT 2F/AX=111Ch
--------D-2113-------------------------------
INT 21 - DOS 1+ - DELETE FILE USING FCB
        AH = 13h
        DS:DX -> unopened FCB (see #01345), filename filled with template for
                deletion ('?' wildcards allowed)
Return: AL = status
            00h one or more files successfully deleted
            FFh no matching files or all were read-only or locked
Notes:  DOS 1.25+ deletes everything in the current directory (including
          subdirectories) and sets the first byte of the name to 00h (entry
          never used) instead of E5h if called on an extended FCB with
          filename '???????????' and bits 0-4 of the attribute set (bits 1 and
          2 for DOS 1.x).  This may have originally been an optimization to
          minimize directory searching after a mass deletion (DOS 1.25+ stop
          the directory search upon encountering a never-used entry), but can
          corrupt the filesystem under DOS 2+ because subdirectories are
          removed without deleting the files they contain.
        currently-open files should not be deleted
        MS-DOS allows deletion of read-only files with an extended FCB, whereas
          Novell NetWare, DR DOS 6, and Novell DOS 7/OpenDOS 7.01 do not
        this function generates a trap "D" under OS/2 v4.x (Warp4) when called
          on an HPFS partition with a wildcard in the filename; it operates
          correctly on FAT partitions and when called without wildcards
SeeAlso: AH=41h,INT 2F/AX=1113h
--------D-2114-------------------------------
INT 21 - DOS 1+ - SEQUENTIAL READ FROM FCB FILE
        AH = 14h
        DS:DX -> opened FCB (see #01345)
Return: AL = status
            00h successful
            01h end of file (no data)
            02h segment wrap in DTA
            03h end of file, partial record read
        Disk Tranfer Area filled with record read from file
Notes:  reads a record of the size specified in the FCB beginning at the
          current file position, then updates the current block and current
          record fields in the FCB
        if a partial record was read, it is zero-padded to the full size
        not supported by MS Windows 3.0 DOSX.EXE DOS extender
SeeAlso: AH=0Fh,AH=15h,AH=1Ah,AH=3Fh"DOS",INT 2F/AX=1108h
--------D-2115-------------------------------
INT 21 - DOS 1+ - SEQUENTIAL WRITE TO FCB FILE
        AH = 15h
        DS:DX -> opened FCB (see #01345)
        Disk Tranfer Area contains record to be written
Return: AL = status
            00h successful
            01h disk full
            02h segment wrap in DTA
Notes:  writes a record of the size specified in the FCB beginning at the
          current file position, then updates the current block and current
          record fields in the FCB
        if less than a full sector is written, the data is placed in a DOS
          buffer to be written out at a later time
        not supported by MS Windows 3.0 DOSX.EXE DOS extender
SeeAlso: AH=0Fh,AH=14h,AH=1Ah,AH=40h,INT 2F/AX=1109h
--------D-2116-------------------------------
INT 21 - DOS 1+ - CREATE OR TRUNCATE FILE USING FCB
        AH = 16h
        DS:DX -> unopened FCB (see #01345), wildcards not allowed
Return: AL = status
            00h successful
            FFh directory full or file exists and is read-only or locked
Notes:  if file already exists, it is truncated to zero length
        if an extended FCB is used, the file is given the attribute in the
          FCB; this is how to create a volume label in the disk's root dir
        not supported by MS Windows 3.0 DOSX.EXE DOS extender
        (FAT32 drive) this function will only succeed for creating a volume
          label; FAT32 does not support FCBs for file I/O
SeeAlso: AH=0Fh,AH=10h,AH=3Ch
--------D-2117-------------------------------
INT 21 - DOS 1+ - RENAME FILE USING FCB
        AH = 17h
        DS:DX -> modified FCB (see also #01345)
                the old filename ('?' wildcards OK) is in the standard location
                while the new filename ('?' wildcards OK, no drive) is stored
                in the 11 bytes beginning at offset 11h
Return: AL = status
            00h successfully renamed
            FFh no matching files,file is read-only, or new name already exists
Notes:  subdirectories may be renamed using an extended FCB with the
          appropriate attribute, as may volume labels
        DR DOS checks password attached with AX=4303h before permitting rename
SeeAlso: AH=0Fh,AH=13h,AX=4303h,AH=56h,INT 2F/AX=1111h
--------D-2118-------------------------------
INT 21 - DOS 1+ - NULL FUNCTION FOR CP/M COMPATIBILITY
        AH = 18h
Return: AL = 00h
Note:   corresponds to the CP/M BDOS function "get bit map of logged drives",
          which is meaningless under MS-DOS
SeeAlso: AH=1Dh,AH=1Eh,AH=20h,AX=4459h,INT 60/DI=0513h
--------v-211812------------------------
INT 21 - VIRUS - "Tasha Yar" - INSTALLATION CHECK
        AX = 1812h
Return: AL = 00h if resident
        DX = 4310h if resident
SeeAlso: INT 21/AX=0B56h"VIRUS",INT 21/AX=187Fh,INT 21/AX=2C2Ch"VIRUS"
--------v-21187FBX4453-----------------------
INT 21 - VIRUS - "DS-3783" -INSTALLATION CHECK
        AX = 187Fh
        BX = 4453h
Return: BX = 87A1h if resident
SeeAlso: AX=1812h"VIRUS",AX=18FFh"VIRUS"
--------v-2118FF-----------------------------
INT 21 - VIRUS - "Pathogen:SMEG" - INSTALLATION CHECK
        AX = 18FFh
Return: AX = E701h if resident
SeeAlso: INT 21/AX=1812h"VIRUS",INT 21/AX=2080h"VIRUS"
--------D-2119-------------------------------
INT 21 - DOS 1+ - GET CURRENT DEFAULT DRIVE
        AH = 19h
Return: AL = drive (00h = A:, 01h = B:, etc)
Note:   Novell NetWare uses the fact that DOS 2.x COMMAND.COM issues this call
          from a particular location every time it starts a command to
          determine when to issue an automatic EOJ
SeeAlso: AH=0Eh,AH=47h,AH=BBh
--------D-211A-------------------------------
INT 21 - DOS 1+ - SET DISK TRANSFER AREA ADDRESS
        AH = 1Ah
        DS:DX -> Disk Transfer Area (DTA)
Notes:  the DTA is set to PSP:0080h when a program is started
        under the FlashTek X-32 DOS extender, the pointer is in DS:EDX
SeeAlso: AH=11h,AH=12h,AH=2Fh,AH=4Eh,AH=4Fh
--------D-211B-------------------------------
INT 21 - DOS 1+ - GET ALLOCATION INFORMATION FOR DEFAULT DRIVE
        AH = 1Bh
Return: AL = sectors per cluster (allocation unit)
        CX = bytes per sector
        DX = total number of clusters
        DS:BX -> media ID byte (see #01356)
Notes:  under DOS 1.x, DS:BX points at an actual copy of the FAT; later
          versions return a pointer to a copy of the FAT's ID byte
        this function may not be properly supported on CD-ROMs and other
          installable file systems (use AX=4402h"CD-ROM" for CD-ROMs
          instead)
BUG:    DOS 7.10 (Win95B/Win98) reportedly returns incorrect values in AL and
          DX for FAT12/FAT16 drives, even though it manages correct results
          for FAT32 drives (DOS windows are not affected, only real-mode
          DOS)
SeeAlso: AH=1Ch,AH=36h

(Table 01356)
Values for media ID byte:
 FFh    floppy, double-sided, 8 sectors per track (320K)
 FEh    floppy, single-sided, 8 sectors per track (160K)
 FDh    floppy, double-sided, 9 sectors per track (360K)
 FCh    floppy, single-sided, 9 sectors per track (180K)
 FAh    HP 200LX D: ROM disk, 16 sectors per track (995K)
        HP 200LX E: (Stacker host drive ???)
 F9h    floppy, double-sided, 15 sectors per track (1.2M)
        floppy, double-sided, 9 sectors per track (720K,3.5")
 F8h    hard disk
 F0h    other media
        (e.g. floppy, double-sized, 18 sectors per track -- 1.44M,3.5")
--------D-211C-------------------------------
INT 21 - DOS 1+ - GET ALLOCATION INFORMATION FOR SPECIFIC DRIVE
        AH = 1Ch
        DL = drive (00h = default, 01h = A:, etc)
Return: AL = sectors per cluster (allocation unit), or FFh if invalid drive
        CX = bytes per sector
        DX = total number of clusters
        DS:BX -> media ID byte (see #01356)
Notes:  under DOS 1.x, DS:BX points at an actual copy of the FAT; later
          versions return a pointer to a copy of the FAT's ID byte
        on a DBLSPACE drive, the total number of clusters is based on the
          estimated compression ratio
        this function may not be properly supported on CD-ROMs and other
          installable file systems (use AX=4402h"CD-ROM" for CD-ROMs
          instead)
BUG:    DOS 7.10 (Win95B/Win98) reportedly returns incorrect values in AL and
          DX for FAT12/FAT16 drives, even though it manages correct results
          for FAT32 drives (DOS windows are not affected, only real-mode
          DOS)
SeeAlso: AH=1Bh,AH=36h
--------D-211D-------------------------------
INT 21 - DOS 1+ - NULL FUNCTION FOR CP/M COMPATIBILITY
        AH = 1Dh
Return: AL = 00h
Note:   corresponds to the CP/M BDOS function "get bit map of read-only
          drives", which is meaningless under MS-DOS
SeeAlso: AH=18h,AH=1Eh,AH=20h,AX=4459h
--------D-211E-------------------------------
INT 21 - DOS 1+ - NULL FUNCTION FOR CP/M COMPATIBILITY
        AH = 1Eh
Return: AL = 00h
Note:   corresponds to the CP/M BDOS function "set file attributes" which was
         meaningless under MS-DOS 1.x
SeeAlso: AH=18h,AH=1Dh,AH=20h
--------D-211F-------------------------------
INT 21 - DOS 1+ - GET DRIVE PARAMETER BLOCK FOR DEFAULT DRIVE
        AH = 1Fh
Return: AL = status
            00h successful
                DS:BX -> Drive Parameter Block (DPB) (see #01357 for DOS 1.x,
                        AH=32h for DOS 2+)
            FFh invalid drive
Note:   this call was undocumented prior to the release of DOS 5.0; however,
          only the DOS 4.0+ version of the DPB has been documented
SeeAlso: AH=32h,AX=7302h

Format of DOS 1.1 and MS-DOS 1.25 drive parameter block:
Offset  Size    Description     (Table 01357)
 00h    BYTE    sequential device ID
 01h    BYTE    logical drive number (0=A:)
 02h    WORD    bytes per sector
 04h    BYTE    highest sector number within a cluster
 05h    BYTE    shift count to convert clusters into sectors
 06h    WORD    starting sector number of first FAT
 08h    BYTE    number of copies of FAT
 09h    WORD    number of directory entries
 0Bh    WORD    number of first data sector
 0Dh    WORD    highest cluster number (number of data clusters + 1)
 0Fh    BYTE    sectors per FAT
 10h    WORD    starting sector of directory
 12h    WORD    address of allocation table
Note:   the DOS 1.0 table is the same except that the first and last fields
          are missing; see INT 21/AH=32h for the DOS 2+ version
SeeAlso: #01395,#04039
--------D-2120-------------------------------
INT 21 - DOS 1+ - NULL FUNCTION FOR CP/M COMPATIBILITY
        AH = 20h
Return: AL = 00h
Note:   corresponds to the CP/M BDOS function "get/set default user
          (sublibrary) number", which is meaningless under MS-DOS
SeeAlso: AH=18h,AH=1Dh,AH=1Eh,AX=4459h
--------v-212080-----------------------------
INT 21 - VIRUS - "New-Year" - INSTALLATION CHECK
        AX = 2080h
Return: AH = 00h if resident (normal DOS return would be AX = 2000h)
SeeAlso: INT 21/AX=18FFh"VIRUS",INT 21/AX=2C2Ch"VIRUS"
--------D-2121-------------------------------
INT 21 - DOS 1+ - READ RANDOM RECORD FROM FCB FILE
        AH = 21h
        DS:DX -> opened FCB (see #01345)
Return: AL = status
            00h successful
            01h end of file, no data read
            02h segment wrap in DTA, no data read
            03h end of file, partial record read
        Disk Tranfer Area filled with record read from file
Notes:  the record is read from the current file position as specified by the
          random record and record size fields of the FCB
        the file position is not updated after reading the record
        if a partial record is read, it is zero-padded to the full size
        not supported by MS Windows 3.0 DOSX.EXE DOS extender
SeeAlso: AH=14h,AH=22h,AH=27h,AH=3Fh"DOS"
--------D-2122-------------------------------
INT 21 - DOS 1+ - WRITE RANDOM RECORD TO FCB FILE
        AH = 22h
        DS:DX -> opened FCB (see #01345)
        Disk Transfer Area contains record to be written
Return: AL = status
            00h successful
            01h disk full
            02h segment wrap in DTA
Notes:  the record is written to the current file position as specified by the
          random record and record size fields of the FCB
        the file position is not updated after writing the record
        if the record is located beyond the end of the file, the file is
          extended but the intervening data remains uninitialized
        if the record only partially fills a disk sector, it is copied to a
          DOS disk buffer to be written out to disk at a later time
        not supported by MS Windows 3.0 DOSX.EXE DOS extender
SeeAlso: AH=15h,AH=21h,AH=28h,AH=40h
--------D-2123-------------------------------
INT 21 - DOS 1+ - GET FILE SIZE FOR FCB
        AH = 23h
        DS:DX -> unopened FCB (see #01345), wildcards not allowed
Return: AL = status
            00h successful (matching file found)
                FCB random record field filled with size in records, rounded up
                to next full record
            FFh failed (no matching file found)
Notes:  not supported by MS Windows 3.0 DOSX.EXE DOS extender
        MS-DOS returns nonsense if the FCB record number field is set to a very
          large positive number, and status FFh if negative; DR DOS returns the
          correct file size in both cases
BUG:    APPEND for DOS 3.3+ corrupts DX if the file is not found
SeeAlso: AH=42h
--------D-2124-------------------------------
INT 21 - DOS 1+ - SET RANDOM RECORD NUMBER FOR FCB
        AH = 24h
        DS:DX -> opened FCB (see #01345)
Notes:  computes the random record number corresponding to the current record
          number and record size, then stores the result in the FCB
        normally used when switching from sequential to random access
        not supported by MS Windows 3.0 DOSX.EXE DOS extender
SeeAlso: AH=21h,AH=27h,AH=42h
--------D-2125-------------------------------
INT 21 - DOS 1+ - SET INTERRUPT VECTOR
        AH = 25h
        AL = interrupt number
        DS:DX -> new interrupt handler
Notes:  this function is preferred over direct modification of the interrupt
          vector table
        some DOS extenders place an API on this function, as it is not
          directly meaningful in protected mode
        under DR DOS 5.0+, this function does not use any of the DOS-internal
          stacks and may thus be called at any time
        Novell NetWare (except the new DOS Requester) monitors the offset of
          any INT 24 set, and if equal to the value at startup, substitutes
          its own handler to allow handling of network errors; this introduces
          the potential bug that any program whose INT 24 handler offset
          happens to be the same as COMMAND.COM's will not have its INT 24
          handler installed
SeeAlso: AX=2501h,AH=35h
--------E-212501-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - RESET DOS EXTENDER DATA STRUCTURES
        AX = 2501h
        SS = application's original SS or DS (FlashTek X-32VM)
Return: CF clear if successful
        CF set on error
            caller is operating on X-32 stack (FlashTek X-32VM)
Notes:  Phar Lap uses INT 21/AH=25h as the entry point for all 386/DOS-Extender
          system calls.  Only available when directly using 386/DOS-Extender or
          a compatible DOS extender, or when using a product that was created
          using 386-DOS/Extender or a compatible
        this function is also supported by FlashTek X-32VM
SeeAlso: AH=30h"Phar Lap"
--------E-212502-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - GET PROTECTED-MODE INTERRUPT VECTOR
        AX = 2502h
        CL = interrupt number
Return: CF clear
        ES:EBX = CS:EIP of protected-mode interrupt handler
Note:   this function is also supported by FlashTek X-32VM
SeeAlso: AX=2503h,AX=2504h,INT 31/AX=0204h
--------E-212503-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - GET REAL-MODE INTERRUPT VECTOR
        AX = 2503h
        CL = interrupt number
Return: CF clear
        EBX = CS:IP of real-mode interrupt handler
Note:   this function is also supported by FlashTek X-32VM
SeeAlso: AX=2502h,AX=2504h,AH=35h,INT 31/AX=0200h
--------E-212504-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - SET PROTECTED-MODE INTERRUPT VECTOR
        AX = 2504h
        CL = interrupt number
        DS:EDX = CS:EIP of protected-mode interrupt handler
Return: CF clear
Note:   this function is also supported by FlashTek X-32VM
SeeAlso: AX=2502h,AX=2505h,INT 31/AX=0205h
--------E-212505-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - SET REAL-MODE INTERRUPT VECTOR
        AX = 2505h
        CL = interrupt number
        EBX = CS:IP of real-mode interrupt handler
Return: CF clear
Note:   this function is also supported by FlashTek X-32VM
SeeAlso: AX=2503h,AX=2504h,INT 31/AX=0201h
--------E-212506-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - SET INT TO ALWAYS GAIN CNTRL IN PR. MODE
        AX = 2506h
        CL = interrupt number
        DS:EDX = CS:EIP of protected-mode interrupt handler
Return: CF clear
Notes:  this function modifies both the real-mode low-memory interrupt
          vector table and the protected-mode Interrupt Descriptor Table (IDT)
        interrupts occurring in real mode are resignaled in protected mode
        this function is also supported by FlashTek X-32VM
--------E-212507-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - SET REAL- & PROTECTED-MODE INT VECTORS
        AX = 2507h
        CL = interrupt number
        DS:EDX = CS:EIP of protected-mode interrupt handler
        EBX = CS:IP of real-mode interrupt handler
Return: CF clear
Notes:  interrupts are disabled until both vectors have been modified
        this function is also supported by FlashTek X-32VM
SeeAlso: AX=2504h,AX=2505h
--------E-212508-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - GET SEGMENT LINEAR BASE ADDRESS
        AX = 2508h
        BX = segment selector
Return: CF clear if successful
            ECX = linear base address of segment
        CF set if invalid segment selector
Note:   this function is also supported by FlashTek X-32VM
SeeAlso: AX=2509h
--------E-212509-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - CONVERT LINEAR TO PHYSICAL ADDRESS
        AX = 2509h
        EBX = linear address to convert
Return: CF clear if successful
            ECX = physical address (carry flag clear)
        CF set if linear address not mapped in page tables
SeeAlso: AX=2508h
--------E-212509-----------------------------
INT 21 P - FlashTek X-32VM - GET SYSTEM SEGMENTS AND SELECTORS
        AX = 2509h
Return: CF clear
        EAX high word = default DS
        AX = alias for 16-bit data segment
        BX = real mode code segment
        EDX high word = selector covering full 4GB address space
        DX = default SS
        ESI high word = PSP selector
        SI = environment selector
--------E-21250A-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - MAP PHYSICAL MEMORY AT END OF SEGMENT
        AX = 250Ah
        ES = segment selector in the Local Descriptor Table (LDT) of segment
             to modify
        EBX = physical base address of memory to map (multiple of 4K)
        ECX = number of physical 4K pages to map
Return: CF clear if successful
            EAX = 32-bit offset in segment of mapped memory
        CF set on error
            EAX = error code
                08h insufficient memory to create page tables
                09h invalid segment selector
SeeAlso: INT 31/AX=0800h
--------E-21250C-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - GET HARDWARE INTERRUPT VECTORS
        AX = 250Ch
Return: CF clear
        AL = base interrupt vector for IRQ0-IRQ7
        AH = base interrupt vector for IRQ8-IRQ15
        BL = interrupt vector for BIOS print screen function (Phar Lap only)
Note:   this function is also supported by FlashTek X-32VM
SeeAlso: INT 31/AX=0400h,INT 67/AX=DE0Ah
--------E-21250D-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - GET REAL-MODE LINK INFORMATION
        AX = 250Dh
Return: CF clear
        EAX = CS:IP of real-mode callback procedure (see #01358) that will
                  call through from real mode to a protected-mode routine
        EBX = 32-bit real-mode address of intermode call data buffer
        ECX = size in bytes of intermode call data buffer
        ES:EDX = protected-mode address of intermode call data buffer
Notes:  this function is also supported by FlashTek X-32VM
        X-32VM guarantees the intermode buffer to be at least 4 KB
SeeAlso: AX=250Eh

(Table 01358)
Call Phar Lap real-mode callback with:
        STACK:  DWORD   offset to protected-mode code
                WORD    placeholder for protected-mode CS
                DWORD   pointer to selector structure (see #01359)
                        or 0000h:0000h for defaults
                var     parameters for protected-mode procedure
Return: via FAR return

Format of Phar Lap selector structure:
Offset  Size    Description     (Table 01359)
 00h    WORD    protected-mode GS selector
 02h    WORD    protected-mode FS selector
 04h    WORD    protected-mode ES selector
 06h    WORD    protected-mode DS selector
--------E-21250E-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - CALL REAL-MODE PROCEDURE
        AX = 250Eh
        EBX = CS:IP of real-mode procedure to call
        ECX = number of two-byte words to copy from protected-mode stack
              to real-mode stack
Return: CF clear if successful
            all segment registers unchanged
            all general registers contain values set by real-mode procedure
            all other flags set as they were left by real-mode procedure
            stack unchanged
        CF set on error
            EAX = error code
                01h not enough real-mode stack space
Note:   this function is also supported by FlashTek X-32VM; under X-32VM, the
          call will fail if ECX > 0000003Fh
SeeAlso: AX=250Dh,AX=2510h,AH=E1h"OS/286",INT 31/AX=0301h
--------E-21250F-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - CONVERT PROTECTED-MODE ADDRESS TO MS-DOS
        AX = 250Fh
        ES:EBX = 48-bit protected-mode address to convert
        ECX = 00000000h or length of data in bytes
Return: CF clear if successful (address < 1MB and contiguous)
            ECX = 32-bit real-mode MS-DOS address
        CF set on error (address >= 1MB or not contiguous)
            ECX = linear address
Note:   this function is also supported by FlashTek X-32VM
SeeAlso: AX=2510h
--------E-212510-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - CALL REAL-MODE PROCEDURE, REGISTERS
        AX = 2510h
        EBX = CS:IP of real-mode procedure to call
        ECX = number of two-byte words to copy to protected-mode stack to
              real-mode stack
        DS:EDX -> pointer to parameter block (see #01360)
Return: CF clear if successful
            all segment registers unchanged,
            EDX unchanged
            all other general registers contain values set by real-mode proc
            all other flags are set as they were left by real-mode procedure
            real-mode register values are returned in the parameter block
        CF set on error
            EAX = error code
                01h not enough real-mode stack space
Note:   unlike most of the preceding 25xxh functions, this one is not
          supported by FlashTek X-32VM
SeeAlso: AX=250Eh,AX=250Fh

Format of Phar Lap real-mode call parameter block:
Offset  Size    Description     (Table 01360)
 00h    WORD    real-mode DS value
 02h    WORD    real-mode ES value
 04h    WORD    real-mode FS value
 06h    WORD    real-mode GS value
 08h    DWORD   real-mode EAX value
 0Ch    DWORD   real-mode EBX value
 10h    DWORD   real-mode ECX value
 14h    DWORD   real-mode EDX value
--------E-212511-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - ISSUE REAL-MODE INTERRUPT
        AX = 2511h
        DS:EDX -> parameter block (see #01361)
Return: all segment registers unchanged
        EDX unchanged
        all other registers contain values set by the real-mode int handler
        the flags are set as they were left by the real-mode interrupt handler
        real-mode register values are returned in the parameter block
Note:   this function is also supported by FlashTek X-32VM
SeeAlso: AX=2503h,AX=2505h,AX=250Eh,AH=E3h"OS/286",INT 31/AX=0300h

Format of Phar Lap real-mode interrupt parameter block:
Offset  Size    Description     (Table 01361)
 00h    WORD    interrupt number
 02h    WORD    real-mode DS value
 04h    WORD    real-mode ES value
 06h    WORD    real-mode FS value
 08h    WORD    real-mode GS value
 0Ah    DWORD   real-mode EAX value
 0Eh    DWORD   real-mode EDX value
Note: all other real-mode values set from protected-mode registers
--------E-212512-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - LOAD PROGRAM FOR DEBUGGING
        AX = 2512h
        DS:EDX -> pointer to ASCIZ program name
        ES:EBX -> pointer to parameter block (see #01363)
        ECX = size in bytes of LDT buffer
Return: CF clear if successful
            EAX = number of segment descriptors in LDT
        CF set on error
            EAX = error code (see #01362)
SeeAlso: AX=2517h

(Table 01362)
Values for Phar Lap error code:
 02h    file not found or path invalid
 05h    access denied
 08h    insufficient memory
 0Ah    environment invalid
 0Bh    invalid file format
 80h    LDT too small

Format of Phar Lap program load parameter block:
Offset  Size    Description     (Table 01363)
Input:
 00h    DWORD   32-bit offset of environment string
 04h    WORD    segment of environment string
 06h    DWORD   32-bit offset of command-tail string
 0Ah    WORD    segment of command-tail string
 0Ch    DWORD   32-bit offset of LDT buffer (size in ECX)
 10h    WORD    segment of LDT buffer
Output:
 12h    WORD    real-mode paragraph address of PSP (see also AH=26h)
 14h    WORD    real/protected mode flag
                0000h  real mode
                0001h  protected mode
 16h    DWORD   initial EIP value
 1Ah    WORD    initial CS value
 1Ch    DWORD   initial ESP value
 20h    WORD    initial SS value
 22h    WORD    initial DS value
 24h    WORD    initial ES value
 26h    WORD    initial FS value
 28h    WORD    initial GS value
--------E-212513-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - ALIAS SEGMENT DESCRIPTOR
        AX = 2513h
        BX = segment selector of descriptor in GDT or LDT
        CL = access-rights byte for alias descriptor
        CH = use-type bit (USE16 or USE32) for alias descriptor
Return: CF clear if successful
            AX = segment selector for created alias
        CF set on error
            EAX = error code
                08h insufficient memory (can't grow LDT)
                09h invalid segment selector in BX
--------E-212514-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - CHANGE SEGMENT ATTRIBUTES
        AX = 2514h
        BX = segment selector of descriptor in GDT or LDT
        CL = new access-rights byte
        CH = new use-type bit (USE16 or USE32)
Return: CF clear if successful
        CF set on error
            EAX = error code
                09h invalid selector in BX
SeeAlso: AX=2515h,INT 31/AX=0009h
--------E-212515-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - GET SEGMENT ATTRIBUTES
        AX = 2515h
        BX = segment selector of descriptor in GDT or LDT
Return: CF clear if successful
            CL = access-rights byte for segment
            CH = use-type bit (USE16 or USE32)
        ECX<16-31> destroyed
        CF set on error
            EAX = error code
                09h invalid segment selector in BX
SeeAlso: AX=2514h
--------E-212516-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender v2.2+ - FREE ALL MEMORY OWNED BY LDT
        AX = 2516h
Return: CF clear
Note:   this function must be called from Ring 0 or the CS descriptor is freed
--------E-212517-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender v2.1c+ - GET INFO ON DOS DATA BUFFER
        AX = 2517h
Return: CF clear
        ES:EBX -> data buffer (protected mode address)
        ECX -> data buffer (real mode address)
        EDX = size of data buffer in bytes
Note:   the data buffer's address changes after calls to AX=2512h and AX=252Ah
SeeAlso: AX=2512h,AX=252Ah,AX=2530h
--------E-212518-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender 2.1c+ - SPECIFY HANDLER FOR MOVED SEGMENTS
        AX = 2518h
        ES:EBX -> function to call when a segment is moved
Return: CF clear
        ES:EBX -> previous handler
--------E-212519-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender VMM - GET ADDITIONAL MEMORY ERROR INFO
        AX = 2519h
Return: CF clear
        EAX = error code
            0000h  no error
            0001h  out of physical memory
            0002h  out of swap space (unable to grow swap file)
            0003h  out of LDT entries and unable to grow LDT
            0004h  unable to change extended memory allocation mark
            FFFFFFFFh   paging disabled
Note:   VMM is the Virtual Memory Manager option
--------E-21251A-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender VMM - LOCK PAGES IN MEMORY
        AX = 251Ah
        EDX = number of 4k pages to lock
        if BL = 00h
            ECX = linear address of first page to lock
        if BL = 01h
            ES:ECX -> pointer to first page to lock
Return: CF clear if successful
        CF set on error
            EAX = error code
                08h insufficient memory
                09h invalid address range
SeeAlso: AX=251Bh,AX=EB06h,INT 31/AX=0600h
--------E-21251B-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender VMM - UNLOCK PAGES
        AX = 251Bh
        EDX = number of pages to unlock
        if BL = 00h
            ECX = linear address of first page to unlock
        if BL = 01h
            ES:ECX -> pointer to first page to unlock
Return: CF clear if successful
        CF set on error
            EAX = error code
                09h invalid address range
SeeAlso: AX=251Ah,AX=EB07h,INT 31/AX=0601h
--------E-21251C-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender VMM v2.1c+ - FREE PHYSICAL MEMORY PAGES
        AX = 251Ch
        BH = preservation flag (00h preserve contents, 01h discard contents)
        EDX = number of pages to free
        BL = address type
            00h linear address
                ECX = linear address of first page to be freed
            01h pointer
                ES:ECX -> first page to be freed
Return: CF clear if successful
        CF set on error
            EAX = error code
                08h memory error, swap space full, no VMM or DPMI
                09h invalid address
--------E-21251D-----------------------------
INT 21 OP - Phar Lap 386/DOS-Extender VMM v2.1c - READ PAGE-TABLE ENTRY
        AX = 251Dh
        BL = address type
            00h linear address
                ECX = linear address of page table entry to read
            01h pointer
                ES:ECX -> page table entry to read
Return: CF clear if successful
            EAX = contents of page table entry
        CF set on error
            EAX = error code
                09h invalid address or NOPAGE option set
                78h invalid under DPMI
Note:   this function is obsolete; use AX=252Bh/BH=09h instead
SeeAlso: AX=251Eh,AX=252Bh/BH=09h,AX=EB00h,INT 31/AX=0506h
--------E-21251E-----------------------------
INT 21 OP - Phar Lap 386/DOS-Extender VMM v2.1c - WRITE PAGE-TABLE ENTRY
        AX = 251Eh
        BL = address type
            00h linear address
                ECX = linear address of page table entry to read
            01h pointer
                ES:ECX -> page table entry to read
        EDX = new value for page table entry
Return: CF clear if successful
        CF set on error
            EAX = error code
                09h invalid address or NOPAGE option set
                82h not compatible with DPMI
Note:   this call is obsolete; use AX=252Bh/BH=0Ah instead
SeeAlso: AX=251Dh,AX=252Bh/BH=0Ah,INT 31/AX=0507h
--------E-21251F-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender VMM - EXHANGE TWO PAGE-TABLE ENTRIES
        AX = 251Fh
        BL = address type
            00h linear address
                ECX = linear address of first page table entry
                EDX = linear address of second page table entry
            01h pointer
                ES:ECX -> first page table entry
                ES:EDX -> second page table entry
Return: CF clear if successful
        CF set on error
            EAX = error code
                09h invalid address or NOPAGE option set
                82h not compatible with DPMI
SeeAlso: AX=251Dh,AX=251Eh
--------E-212520-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender VMM - GET MEMORY STATISTICS
        AX = 2520h
        DS:EDX -> pointer to buffer at least 100 bytes in size (see #01364)
        BL = 0 (don't reset VM stats), 1 (reset VM stats)
Return: carry flag clear

Format of Phar Lap VM statistics buffer:
Offset  Size    Description     (Table 01364)
 00h    DWORD   VM status
                0001h VM subsystem is present
                0000h VM not present
 04h    DWORD   "nconvpg" number of conventional memory pages available
 08h    DWORD   "nbimpg" number of Compaq built-in memory pages available
 0Ch    DWORD   "nextpg" total number of extended memory pages
 10h    DWORD   "extlim" extender memory pages limit
 14h    DWORD   "aphyspg" number of physical memory pages allocated to appl
 18h    DWORD   "alockpg" number of locked pages owned by application
 1Ch    DWORD   "sysphyspg" number physical memory pages allocated to system
 20h    DWORD   "nfreepg" number of free physical pages; approx if EMS VCPI
 24h    DWORD   linear address of beginning of application address space
 28h    DWORD   linear address of end of application address space
 2Ch    DWORD   number of seconds since last time VM stats were reset
 30h    DWORD   number of page faults since last time
 34h    DWORD   number of pages written to swap file since last time
 38h    DWORD   number of reclaimed pages (page faults on swapped pages)
 3Ch    DWORD   number of virtual pages allocated to the application
 40h    DWORD   size in pages of swap file
 44h    DWORD   number of system pages allocated with EMS calls
 48h    DWORD   minimum number of conventional memory pages
 4Ch    DWORD   maximum size in pages to which swap file can be increased
 50h    DWORD   "vmflags"
                bit 0 = 1 if page fault in progress
---v4.0+ ---
 54h    DWORD   number of physical pages guaranteed to be free
 58h    DWORD   number of free physical pages currently available
 5Ch    DWORD   size in pages of largest free block of memory (including disk
                  swap space)
 60h    DWORD   reserved
--------E-212521-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender VMM - LIMIT PROGRAM'S EXTENDED MEM USAGE
        AX = 2521h
        EBX = max 4k pages of physical extended memory which program may use
Return: CF clear if successful
           EBX = maximum limit in pages
           ECX = minimum limit in pages
        CF set on error
            EAX = error code
                08h insufficient memory or -nopage switch used
SeeAlso: AX=2522h
--------E-212522-----------------------------
INT 21 P - Phar Lap 386/DOS-Ext VMM v2.2+ - SPECIFY ALTERNATE PAGE-FAULT HANDLR
        AX = 2522h
        ES:EBX -> alternate handler for page faults
Return: CF clear
        ES:EBX -> previous page-fault handler
SeeAlso: AX=2523h
--------E-212523-----------------------------
INT 21 P - Phar Lap 386/DOS-Ext VMM v2.2+ - SPECIFY OUT-OF-SWAP-SPACE HANDLER
        AX = 2523h
        ???
Return: ???
Note:   this function takes a DWORD pointer and a DWORD pointer to a DWORD
          pointer as arguments
SeeAlso: AX=2522h
--------E-212524-----------------------------
INT 21 P - Phar Lap 386/DOS-Ext VMM v2.2+ - INSTALL PAGE-REPLACEMENT HANDLERS
        AX = 2524h
        ???
Return: ???
Note:   this function takes three DWORD pointers and three DWORD pointers to
          DWORD pointers as arguments
--------E-212525-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender VMM - LIMIT PROGRAM'S CONVENT'L MEM USAGE
        AX = 2525h
        EBX = limit in 4k pages of physical conventional memory which program
              may use
Return: CF clear if successful
            EBX = maximum limit in pages
            ECX = minimum limit in pages
        CF set on error
            EAX = error code
                08h insufficient memory or -nopage switch used
SeeAlso: AX=2521h
--------E-212526-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - GET CONFIGURATION INFORMATION
        AX = 2526h
        ???
Return: ???
Notes:  details are not yet available
        this function takes a pointer to the configuration buffer (see #01365)
          and a poitner to a BYTE as arguments

Format of Phar Lap configuration buffer:
Offset  Size    Description     (Table 01365)
 00h    DWORD   flags 1 (see #01366)
 04h    DWORD   flags 2 (unused through v5.0)
 08h    DWORD   flags 3 (unused through v5.0)
 0Ch    DWORD   386|DOS-Extender major version
 10h    DWORD   386|DOS-Extender minor version
 14h    DWORD   first letter of text after minor version number in version str
 18h    DWORD   beta flag (00h normal release, 01h beta release)
 1Ch    DWORD   processor (3 = 386, 4 = 486)
 20h    DWORD   coprocessor (4 = none, 6 = 287, 7 = 387/486)
 24h    DWORD   Weitek coprocessor flag (0 = none, 1 = present)
 28h    DWORD   machine type (0 = IBM PC compatible, 1 = NEC 9800 series)
 2Ch    DWORD   machine class
                IBM: bus type (0=ISA, 1=MCA, 2=XT, 3=EISA)
                NEC: 0=normal mode, 1=high-res mode
 30h    DWORD   VCPI flag (0 = none, 1 = present)
 34h    DWORD   -WEITEK/-1167 switch (0 = AUTO, 1 = ON, 2 = OFF)
 38h    DWORD   -MINREAL setting
 3Ch    DWORD   -MAXREAL setting
 40h    DWORD   -MINIBUF setting
 44h    DWORD   -MAXIBUF setting
 48h    DWORD   size in bytes of DOS call data buffer
 4Ch    DWORD   number of interrupt stacks (-NISTACK)
 50h    DWORD   interrupt stack size (-ISTKSIZE)
 54h    DWORD   -REALBREAK setting
 58h    DWORD   -CALLBUFS
 5Ch    DWORD   -HWIVEC
 60h    DWORD   -PRIVEC
 64h    DWORD   -INTMAP
 68h    DWORD   -PRIMAP
 6Ch    DWORD   VCPI: master 8259 interrupt vector base (IRQ0 mapping)
 70h    DWORD   VCPI: slave 8259 interrupt vector base (IRQ8 mapping)
 74h    DWORD   BIOS print screen interrupt vector (0 if NEC)
 78h    DWORD   -EXTLOW setting
 7Ch    DWORD   -EXTHIGH setting
 80h    DWORD   lowest physical extended-memory address allocatable
 84h    DWORD   highest physical extended-memory address allocatable + 1
 88h    DWORD   special memory's physical base address (00000000h if none)
 8Ch    DWORD   special memory size in bytes (00000000h if none)
 90h    DWORD   -MAXVCPIMEM setting
 94h    DWORD   -VSCAN
 98h    DWORD   -SWAPCHK (0 = OFF, 1 = ON, 2 = FORCE, 3 = MAX)
 9Ch    DWORD   -CODESIZE setting
 A0h    DWORD   minimum swap file size (-MINSWFSIZE)
 A4h    DWORD   maximum swap fiel size (-MAXSWFSIZE)
 A8h    DWORD   page replacement policy (0 = LFU, 1 = NUR)
 ACh    DWORD   number of GDT entries (-NGDTENT)
 B0h    DWORD   number of LDT entries (-NLDTENT)
 B4h    DWORD   program's privilege level (0-3)
---386|DOS-Extender v3.0+ ---
 B8h    DWORD   -LOCKSTACK setting
 BCh    DWORD   -MAXEXTMEM
 C0h    DWORD   -MAXXMSMEM
 C4h    DWORD   -MAXPGMMEM
 C8h    DWORD   -DATATHRESHOLD
 CCh    DWORD   virtual memory manager flag (0 = not present, 1 = present)
 D0h    DWORD   Cyrix coprocessor flag (0 = no Cyrix EMC387, 1 = present)
 D4h    DWORD   -CYRIX setting (0 = AUTO, 1 = ON, 2 = OFF)
 D8h    DWORD   DPMI flag (0 = not present, 1 = present)
 DCh    DWORD   DPMI major version
 E0h    DWORD   DPMI minor version
 E4h    DWORD   DPMI capabilities flags (see #01367)
 E8h    DWORD   VCPI major version
 ECh    DWORD   VCPI minor version
 F0h    WORD    VCPI: IRQ0-7 physical base interrupt vector
 F2h    WORD    VCPI: IRQ8-15 physical base interrupt vector
 F4h    DWORD   XMS flag (0 = none, 1 = present)
 F8h    DWORD   XMS major version
 FCh    DWORD   XMS minor version
100h    WORD    application's CS selector
102h    WORD    application's DS selector
104h    WORD    application's PSP selector
106h    WORD    application's environment selector
108h    WORD    selector mapping entire first megabyte
10Ah    WORD    selector mapping text video memory
10Ch    WORD    selector mapping video memory (text for IBM, graphics for NEC)
10Eh    WORD    selector mapping Weitek address space, 0000h if not present
110h    WORD    selector mapping Cyrix EMC387 address space, 0000h if none
112h    WORD    reserved (0)
114h    DWORD   real-mode FAR entry point to call to switch to protected mode
                  with no saved context
118h    DWORD   size of LDT in bytes
---386|DOS-Extender v5.0+ ---
11Ch    DWORD   Windows flag (0 = not present, 1 = Windows present)
120h    DWORD   Windows major version
124h    DWORD   Windows minor version
128h    DWORD   Windows mode (0 = real/standard, 1 = enhanced)
12Ch    DWORD   OS/2 flag (0 = not present, 1 = OS/2 present)
130h    DWORD   OS/2 major version
134h    DWORD   OS/2 minor version
138h 50 DWORDs  reserved (0)

Bitfields for flags 1:
Bit(s)  Description     (Table 01366)
 0      -NOPAGE specified
 1      -A20 specified
 2      -VDISK specified
 3      -XT specified
 4      -AT specified
 5      -MCA specified
 6      -EISA specified
 7      -NORMRES specified (NEC only)
 8      -HIGHRES specified (NEC only)
 9      set if -SWFGROW1ST, clear if -NOSWFGROW1ST
 10     -NOVM specified
 11     -SAVEREGS specified
 12     unused (clear)
 13     -NOVCPI specified
 14     -NOMUL specified
 15     -NOBMCHK specified
 16     -NOSPCLMEM or -NOBIM
 17     -NOPGEXP specified
 18     -SWAPDEFDISK specified
---v3.0+ ---
 19     -SAVEINTS specified
 20     -NOLOAD specified
 21     -PAGELOG specified
 22     -OPENDENY specified
 23     -ERRATA17 specified
---v4.1+ ---
 24     -NESTDPMI specified
 25     -NONESTDPMI specified
 26     -NODPMI specified
 27     -NOPCDWEITEK specified
---v4.2+ ---
 28     -WININT21 specified

Bitfields for DPMI capabilities flags:
Bit(s)  Description     (Table 01367)
 0      paging supported
 1      physical device mapping
 2      conventional memory mapping
 3      exceptions restartable
--------E-212527-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender VMM - EN/DISABLE STATE SAVE ON INTERRUPTS
        AX = 2527h
        EBX = new status (00h disabled, 01h enabled)
Return: CF clear
        EBX = previous state save flag
SeeAlso: AX=2528h
--------E-212528-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender VMM - READ REGISTERS AFTER CTRL-C INT
        AX = 2528h
        DS:EBX -> buffer for registers (see #01368)
Return: CF clear if successful
            DS:EBX buffer filled
        CF set on error
            EAX = error code
                83h interrupt state save not enabled
                84h no active interrupt
SeeAlso: AX=2527h

Format of Phar Lap buffer for registers:
Offset  Size    Description     (Table 01368)
 00h  8 BYTEs   unused
 08h  4 DWORDs  EAX,EBX,ECX,EDX
 18h  4 DWORDs  ESI,EDI,EBP,ESP
 28h  6 WORDs   CS,DS,SS,ES,FS,GS
 34h    DWORD   EIP
 38h    DWORD   EFLAGS
--------E-212529-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - LOAD FLAT MODEL .EXP or .REX FILE
        AX = 2529h
        ???
Return: ES:EBX -> parameter block (see #01369)
        ???
Note:   details not available at this time
SeeAlso: AX=252Ah

Format of Phar Lap program load parameter block:
Offset  Size    Description     (Table 01369)
 00h    DWORD   initial EIP
 04h    WORD    initial CS
 06h    DWORD   initial ESP
 0Ah    WORD    initial SS
 0Ch  4 WORDs   initial DS, ES, FS, GS
 14h    DWORD   minimum size in bytes of program segment
 18h    DWORD   bytes of additional memory allocated
 1Ch    DWORD   flags
                bit 0: child linked with -UNPRIVILEGED
                ---v6.0+ ---
                bit 1: child is PE file instead of .EXP
                bit 2: loaded file is a DLL
                bits 3-31 reserved
---v6.0+ ---
 20h    DWORD   module handles (PE files only)
 24h  7 DWORDs  reserved (0)
--------E-21252A-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender VMM - NEW LOAD PROGRAM FOR DEBUG
        AX = 252Ah
        DS:EDX -> ASCIZ program name
        ES:EBX -> parameter block (see #01363)
        ECX = size of LDT buffer in bytes
        ESI = bit flags
            bit 0: allow demand paging rather than loading entire program
            bit 1: demand page from swap file rather than from .EXP
Return: CF clear if successful
            EAX = VMM handle or FFFFFFFFh if none
            ECX = number of descriptors in LDT buffer
        CF set on error
            EAX = error code
                02h file error
                    EBX = file error code (see #01370)
                    ECX = DOS error code if EBX=1,2,3, or 8
                08h insufficient memory
                    EBX = memory error code (see #01371)
                80h LDT buffer too small
                87h called twice without intervening call to AX=2531h
SeeAlso: AX=2512h,AX=2517h,AX=2529h,AX=2531h

(Table 01370)
Values for Phar Lap file error code:
 01h    DOS open error
 02h    DOS seek error
 03h    DOS read error
 04h    not an .EXP or .REX file
 05h    invalid file format
 06h    -OFFSET is not a multiple of 64K
 07h    -NOPAGE incompatible with -REALBREAK/-OFFSET
 08h    DOS error loading .EXE file

(Table 01371)
Values for Phar Lap memory error code:
 01h    out of physical memory
 02h    out of swap space
 04h    unable to change extended memory allocation
 05h    -MAXPGMMEM exceeded
 06h    insufficient low memory to REALBREAK value
 07h    insufficient low memory for PSP and environment
--------E-21252BBH00-------------------------
INT 21 Pu - Phar Lap 386/DOS-Extender - CREATE UNMAPPED PAGES
        AX = 252Bh
        BH = 00h
        ???
Return: ???
--------E-21252BBH01-------------------------
INT 21 Pu - Phar Lap 386/DOS-Extender - CREATE ALLOCATED PAGES
        AX = 252Bh
        BH = 01h
        ???
Return: ???
--------E-21252BBH02-------------------------
INT 21 Pu - Phar Lap 386/DOS-Extender - CREATE PHYSICAL DEVICE PAGES
        AX = 252Bh
        BH = 02h
        ???
Return: ???
--------E-21252BBH03-------------------------
INT 21 Pu - Phar Lap 386/DOS-Extender - MAP DATA FILE
        AX = 252Bh
        BH = 03h
        ???
Return: ???
SeeAlso: AX=252Bh/BH=0Bh
--------E-21252BBH04-------------------------
INT 21 Pu - Phar Lap 386/DOS-Extender - GET PAGE TYPES
        AX = 252Bh
        BH = 04h
        ???
Return: ???
Note:   returns one word per page
SeeAlso: #01372

Bitfields for Phar Lap page information:
Bit(s)  Description     (Table 01372)
 7      mapped to read/write data file
 6      mapped to read-only data file
 5      swapped to disk
 4      locked
 3-0    page type
        0 unmapped
        1 allocated
        2 physical device page
--------E-21252B-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - VIRTUAL MEMORY MANAGEMENT - PAGE LOCKING
        AX = 252Bh
        BH = function
            05h lock pages
            06h unlock pages
        BL = address type
            00h linear address
                ECX = linear start address of memory region
            01h segmented address
                ES:ECX -> start of memory region
        EDX = size of memory region in bytes
Return: CF clear if successful
        CF set on error
Note:   this function is also supported by FlashTek X-32VM; if X-32 is not
          using virtual memory, this function always succeeds
--------E-21252B-----------------------------
INT 21 Pu - Phar Lap 386/DOS-Extender - FREE PHYSICAL PAGES
        AX = 252Bh
        BH = function (07h,08h)
        ???
Return: ???
--------E-21252BBH09-------------------------
INT 21 P - Phar Lap 386/DOS-Extender v4.1 - GET PAGETABLE ENTRY/PAGE TABLE INFO
        AX = 252Bh
        BH = 09h
        BL = subfunction
            00h get page table entry by linear address
                ECX = linear address for which to get page table entry
            01h get page table entry by logical address
                ES:ECX = address for which to get page table entry
Return: CF clear if successful
            EAX = page table entry
            EBX = additional page table information
        CF set on error
            EAX = error code
                0009h invalid address
                0082h running under DPMI
SeeAlso: AX=251Dh,AX=252Bh/BH=0Ah
--------E-21252BBH0A-------------------------
INT 21 P - Phar Lap 386/DOS-Extender v4.1 - SET PAGETABLE ENTRY/PAGE TABLE INFO
        AX = 252Bh
        BH = 0Ah
        BL = subfunction
            00h set page table entry for linear address
                ECX = linear address for which to get page table entry
            01h set page table entry for logical address
                ES:ECX = address for which to get page table entry
        ESI = page table entry
        EDI = additional page table information
Return: CF clear if successful
        CF set on error
            EAX = error code
                0009h invalid address
                0082h running under DPMI
SeeAlso: AX=252Bh/BH=09h
--------E-21252BBH0B-------------------------
INT 21 P - Phar Lap 386/DOS-Extender v4.1+ - MAP DATA FILE AT FILE OFFSET
        AX = 252Bh
        BH = 0Bh
        BL = subfunction
            00h by linear address
                ECX = linear address at which to map data file
            01h by logical address
                ES:ECX = logical address at which to map data file
        EDX = number of bytes to map
        DS:ESI -> mapping structure (see #01373)
        DS:EDI -> ASCIZ filename
Return: CF clear if successful
        CF set on error
            EAX = error code
                0002h file error
                    ECX = phase (01h opening file, 02h seeking, 03h reading)
                    EDX = error code returned by DOS
                0009h invalid address
                0081h invalid parameters or 386|VMM not present
                0086h all 386|VMM file handles already in use
SeeAlso: AX=252Bh/BH=03h,AX=252Bh/BH=09h

Format of Phar Lap mapping structure:
Offset  Size    Description     (Table 01373)
 00h    DWORD   starting file offset to be mapped
 04h    DWORD   DOS file access and sharing modes (see #01403 at INT 21/AH=3Dh)
--------E-21252C-----------------------------
INT 21 P - Phar Lap 386/DOS-Ext VMM v3.0 - ADD UNMAPPED PAGES AT END OF SEGMENT
        AX = 252Ch
        BX = segment selector
        ECX = number of 4K pages to add
Return: CF clear if successful
            EAX = offset in segment of beginning of unmapped pages
        CF set on error
            EAX = error code
                08h insufficent memory
                09h invalid selector
                82h not supported by current DPMI
--------E-21252D-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender VMM v2.3+ - CLOSE VMM FILE HANDLE
        AX = 252Dh
        EBX = VMM file handle
Return: CF clear if successful
        CF set on error
            EAX = error code (81h invalid VMM handle)
--------E-21252E-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender VMM v2.3+ - GET/SET VMM PARAMETERS
        AX = 252Eh
        CL = direction (00h get parameters, 01h set parameters)
        DS:EBX -> parameter buffer (see #01374)
Return: CF clear if successful
        CF set on error
            EAX = error code (81h bad parameter value)

Format of Phar Lap VMM parameter buffer:
Offset  Size    Description     (Table 01374)
 00h    DWORD   flags
                bit 0: page fault logging enabled
                ---v5.0+ ---
                bit 1: swap extender to disk during DOS EXEC call
                bit 2: don't zero allocated memory
 04h    DWORD   scan period for page aging, in milliseconds
 08h    DWORD   maximum size (in bytes) to check on each page scan
 0Ch 52 BYTEs   unused
--------E-21252F-----------------------------
INT 21 P - Phar Lap 386/DOS-Ext VMM v3.0 - WRITE RECORD TO VMM PAGE LOG FILE
        AX = 252Fh
        DS:EBX -> data to be written
        CX = size of data in bytes
Return: CF clear if successful
        CF set on error
            EAX = error code (85h no page log file or not 386/VMM)
--------E-212530-----------------------------
INT 21 P - Phar Lap 386/DOS-Ext VMM v2.3+ - SET SIZE OF BUFFER FOR DOS CALLS
        AX = 2530h
        ECX = size of data buffer in bytes (1024 to 65536)
Return: CF clear if successful
        CF set on error
            EAX = error code
                08h insufficient low memory
                81h invalid size
SeeAlso: AX=2517h
--------E-212531-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender VMM v3.0 - READ/WRITE LDT DESCRIPTOR
        AX = 2531h
        BX = segment selector
        ECX = direction (00h read, 01h write)
        DS:EDX -> 8-byte buffer for descriptor contents
Return: CF clear if successful
        CF set on error
            EAX = error code
                81h invalid selector
                82h DPMI running, or not a code or data segment
--------E-212532-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - GET EXCEPTION HANDLER VECTOR
        AX = 2532h
        CL = exception number (00h-0Fh)
Return: CF clear if successful
            ES:EBX = CS:EIP of current exception handler
        CF set on error (CL > 0Fh)
Notes:  this call is also supported by the FlashTek X-32VM extender
        this function is incompatible with 386|VMM; use AX=2522h instead
SeeAlso: AX=2522h,AX=2533h
--------E-212533-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - SET EXCEPTION HANDLER VECTOR
        AX = 2533h
        CL = exception number (00h-0Fh)
        DS:EDX = CS:EIP of new exception handler
Return: CF clear if successful
        CF set on error (CL > 0Fh)
Notes:  this call is also supported by the FlashTek X-32VM extender
        this function is incompatible with 386|VMM; use AX=2522h instead
SeeAlso: AX=2522h,AX=2532h
--------E-212534-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender v3.0+ - GET INTERRUPT FLAG
        AX = 2534h
Return: CF clear
        EAX = interrupt state (00h disabled, 01h enabled)
--------E-212535-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender v3.0+ - READ/WRITE SYSTEM REGISTERS
        AX = 2535h
        EBX = direction (00h read registers, 01h write)
        DS:EDX -> system register record (see #01375)
Return: CF clear
Note:   this call is only available under MS Windows if PHARLAP.386 VDD is
          installed

Format of Phar Lap system register record:
Offset  Size    Description     (Table 01375)
 00h    DWORD   CR0
 04h  4 DWORDs  DR0,DR1,DR2,DR3
 14h  2 DWORDs  reserved
 1Ch  2 DWORDs  DR6,DR7
 24h  3 DWORDs  reserved
--------E-212536----------------------------
INT 21 P - Phar Lap 386/DOS-Ext VMM v3.0+ - MIN/MAX EXTENDED/CONV MEMORY USAGE
        AX = 2536h
        EBX = bit flags
            bit 0: modifying conventional memory rather than extended memory
            bit 1: setting maximum memory usage rather than minimum
        ECX = new limit in 4K pages
Return: CF clear if successful
            EAX = new limit
        CF set on error
            EAX = error code (08h memory error or -NOPAGE set)
            EBX = maximum limit in pages
            ECX = minimum limit in pages
--------E-212537----------------------------
INT 21 P - Phar Lap 386/DOS-Ext VMM v3.0 - ALLOCATE DOS MEMORY ABOVE DOS BUFFER
        AX = 2537h
        BX = number of paragraphs to allocate
Return: CF clear if successful
            AX = real-mode segment of allocated block
        CF set on error
            AX = error code
                07h MS-DOS memory chain corrupted
                08h insufficient low memory
            BX = size in paragraphs of largest free block
SeeAlso: AH=48h
--------E-212538----------------------------
INT 21 P - Phar Lap 386/DOS-Ext VMM v3.0 - READ PROTMODE REGS AFTER SFTWARE INT
        AX = 2538h
        DS:EBX -> buffer for registers (see #01368)
        ECX = register record to retrieve
            00h first interrupt state
            01h next interrupt state
                EDX = handle for current interrupt state
Return: CF clear if successful
            DS:EBX buffer filled
            EDX = handle of current interrupt state
            ESI = number of interrupt which occurred
        CF set on error
            EAX = error code
                81h invalid handle in EDX
                83h register saving not enabled
                84h no more interrupt states
SeeAlso: AX=2527h,AX=2528h
--------E-212539----------------------------
INT 21 P - Phar Lap 386/DOS-Ext VMM v3.0 - GET OFFSET OF .EXP FILE HEADER
        AX = 2539h
        BX = MS-DOS file handle for open file
Return: CF clear if successful
            EAX = offset of .EXP header in file
        CF set on error
            EAX = error code (02h file error)
            EBX = file error code
                02h DOS error seeking
                03h DOS error reading
                04h invalid file type
                05h invalid file format
            ECX = DOS error code if EBX=02h or 03h
        current file position in file modified
--------E-21253A----------------------------
INT 21 P - Phar Lap 386/DOS-Extender v3.0+ - INSTALL MOD. SEG FAILURE HANDLER
        AX = 253Ah
        ES:EBX -> function to be called when INT 21/AH=4Ah is about to return
                an error
Return: CF clear
        ES:EBX -> previous handler
SeeAlso: AH=4Ah
--------E-21253B----------------------------
INT 21 P - Phar Lap 386/DOS-Extender v3.0+ - JUMP TO REAL MODE CODE, NO CONTEXT
        AX = 253Bh
        DS:EBX -> buffer containing register contents (see #01368)
Return: never returns
SeeAlso: AX=2528h
--------E-21253C-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender VMM v3.0+ - SHRINK 386|VMM SWAP FILE
        AX = 253Ch
Return: CF clear
        EAX = old size of swap file in bytes
        EBX = new size of swap file in bytes
--------E-21253D-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender v4.0+ - READ/WRITE IDT DESCRIPTOR
        AX = 253Dh
        BL = interrupt number
        ECX = direction (0 = read, 1 = write)
        DS:EDX -> 8-byte buffer for descriptor
Return: CF clear if successful
            DS:EDX filled if reading
        CF set on error
            EAX = error code (0082h if running under DPMI)
Desc:   access hardware-level IDT rather than the internal 386/DOS-Extender
          shadow IDT
Notes:  this call will always fail under DPMI because it is not possible to
          access the IDT
        the descriptor is not checked when writing
        this call can normally be used only by programs running in ring 0
          because the processor does not allow an interrupt to be vectored to
          a less privileged ring
--------E-21253F-----------------------------
INT 21 Pu - Phar Lap 386/DOS-Extender v6.0+ - ALLOCATE LDT DESCRIPTOR
        AX = 253Fh
        BX = LDT descriptor to allocate (0000h for any)
        ???
Return: ???
--------E-212540-----------------------------
INT 21 Pu - Phar Lap 386/DOS-Extender v6.0+ - FORCE ALIAS OF SEGMENT
        AX = 2540h
        ???
Return: ???
--------E-212544-----------------------------
INT 21 Pu - Phar Lap 386/DOS-Extender v6.0+ - FREE DLL
        AX = 2544h
        ???
Return: ???
--------E-212545-----------------------------
INT 21 Pu - Phar Lap 386/DOS-Extender v6.0+ - GET/SET PROCEDURE ADDRESS
        AX = 2545h
        ECX = direction (00h get, 01h set)
        ???
Return: ???
--------E-212546-----------------------------
INT 21 Pu - Phar Lap 386/DOS-Extender v6.0+ - GET MODULE HANDLE
        AX = 2546h
        ???
Return: ???
--------E-2125C0-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - ALLOCATE MS-DOS MEMORY BLOCK
        AX = 25C0h
        BX = number of 16-byte paragraphs of MS-DOS memory requested
Return: CF clear if successful
            AX = real-mode paragraph address of memory
        CF set on error
            AX = error code
                07h MS-DOS memory control blocks destroyed
                08h insufficient memory
            BX = size in paragraphs of largest available memory block
SeeAlso: AX=25C1h,AX=25C2h
--------E-2125C1-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - RELEASE MS-DOS MEMORY BLOCK
        AX = 25C1h
        CX = real-mode paragraph address of memory block to free
Return: CF clear if successful
            EAX destroyed
        CF set on error
            AX = error code
                07h MS-DOS memory control blocks destroyed
                09h invalid memory block address in CX
SeeAlso: AX=25C0h,AX=25C2h
--------E-2125C2-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - MODIFY MS-DOS MEMORY BLOCK
        AX = 25C2h
        BX = new requested block size in paragraphs
        CX = real-mode paragraph address of memory block to modify
Return: CF clear if successful
            EAX destroyed
        CF set on error
            AX = error code
                07h MS-DOS memory control blocks destroyed
                08h insufficient memory
                09h invalid memory block address in CX
            BX = size in paragraphs of largest available memory block
SeeAlso: AX=25C0h,AX=25C1h
--------E-2125C3-----------------------------
INT 21 P - Phar Lap 386/DOS-Extender - EXECUTE PROGRAM
        AX = 25C3h
        ES:EBX -> pointer to parameter block (see #01377)
        DS:EDX -> pointer to ASCIZ program filename
Return: CF clear if successful
            all registers unchanged
        CF set on error
            EAX = error code (see #01376)

(Table 01376)
Values for Phar Lap error code:
 01h    function code in AL is invalid ???
 02h    file not found or path invalid
 05h    access denied
 08h    insufficient memory to load program
 0Ah    environment invalid
 0Bh    invalid file format

Format of parameter block:
Offset  Size    Description     (Table 01377)
 00h    DWORD   32-bit offset of environment string
 04h    WORD    segment selector of environment string
 06h    DWORD   32-bit offset of command-tail string
 0Ah    WORD    segment selector of command-tail string
--------D-2126-------------------------------
INT 21 - DOS 1+ - CREATE NEW PROGRAM SEGMENT PREFIX
        AH = 26h
        DX = segment at which to create PSP (see #01378)
Return: AL destroyed
Notes:  new PSP is updated with memory size information; INTs 22h, 23h, 24h
          taken from interrupt vector table; the parent PSP field is set to 0
        (DOS 2+) DOS assumes that the caller's CS is the segment of the PSP to
          copy
SeeAlso: AH=4Bh,AH=50h,AH=51h,AH=55h,AH=62h,AH=67h

Format of Program Segment Prefix (PSP):
Offset  Size    Description     (Table 01378)
 00h  2 BYTEs   INT 20 instruction for CP/M CALL 0 program termination
                the CDh 20h here is often used as a signature for a valid PSP
 02h    WORD    segment of first byte beyond memory allocated to program
 04h    BYTE    (DOS) unused filler
                (OS/2) count of fake DOS version returns
 05h    BYTE    CP/M CALL 5 service request (FAR CALL to absolute 000C0h)
                BUG: (DOS 2+ DEBUG) PSPs created by DEBUG point at 000BEh
 06h    WORD    CP/M compatibility--size of first segment for .COM files
 08h  2 BYTEs   remainder of FAR JMP at 05h
 0Ah    DWORD   stored INT 22 termination address
 0Eh    DWORD   stored INT 23 control-Break handler address
 12h    DWORD   DOS 1.1+ stored INT 24 critical error handler address
 16h    WORD    segment of parent PSP
 18h 20 BYTEs   DOS 2+ Job File Table, one byte per file handle, FFh = closed
 2Ch    WORD    DOS 2+ segment of environment for process (see #01379)
 2Eh    DWORD   DOS 2+ process's SS:SP on entry to last INT 21 call
 32h    WORD    DOS 3+ number of entries in JFT (default 20)
 34h    DWORD   DOS 3+ pointer to JFT (default PSP:0018h)
 38h    DWORD   DOS 3+ pointer to previous PSP (default FFFFFFFFh in 3.x)
                used by SHARE in DOS 3.3
 3Ch    BYTE    DOS 4+ (DBCS) interim console flag (see AX=6301h)
                Novell DOS 7 DBCS interim flag as set with AX=6301h
                (possibly also used by Far East MS-DOS 3.2-3.3)
 3Dh    BYTE    (APPEND) TrueName flag (see INT 2F/AX=B711h)
 3Eh    BYTE    (Novell NetWare) flag: next byte initialized if CEh
                (OS/2) capabilities flag
 3Fh    BYTE    (Novell NetWare) Novell task number if previous byte is CEh
 40h  2 BYTEs   DOS 5+ version to return on INT 21/AH=30h
 42h    WORD    (MSWindows3) selector of next PSP (PDB) in linked list
                Windows keeps a linked list of Windows programs only
 44h    WORD    (MSWindows3) "PDB_Partition"
 46h    WORD    (MSWindows3) "PDB_NextPDB"
 48h    BYTE    (MSWindows3) bit 0 set if non-Windows application (WINOLDAP)
 49h    BYTE    unused by DOS versions <= 6.00
 4Ch    WORD    (MSWindows3) "PDB_EntryStack"
 4Eh  2 BYTEs   unused by DOS versions <= 6.00
 50h  3 BYTEs   DOS 2+ service request (INT 21/RETF instructions)
 53h  2 BYTEs   unused in DOS versions <= 6.00
 55h  7 BYTEs   unused in DOS versions <= 6.00; can be used to make first FCB
                  into an extended FCB
 5Ch 16 BYTEs   first default FCB, filled in from first commandline argument
                overwrites second FCB if opened
 6Ch 16 BYTEs   second default FCB, filled in from second commandline argument
                  overwrites beginning of commandline if opened
 7Ch  4 BYTEs   unused
 80h 128 BYTEs  commandline / default DTA
                command tail is BYTE for length of tail, N BYTEs for the tail,
                  followed by a BYTE containing 0Dh
Notes:  in DOS v3+, the limit on simultaneously open files may be increased by
          allocating memory for a new open file table, filling it with FFh,
          copying the first 20 bytes from the default table, and adjusting the
          pointer and count at 34h and 32h.  However, DOS will only copy the
          first 20 file handles into a child PSP (including the one created on
          EXEC).
        in an OS/2 DOS box, values of D0h-FEh in the open file table indicate
          device drivers
        network redirectors based on the original MS-Net implementation use
          values of 80h-FEh in the open file table to indicate remote files;
          Novell NetWare also uses values from FEh down to 80h or one more than
          FILES= (whichever is greater) to indicate remote files (except on
          OS/2, where is uses CFh down to 80h)
        MS-DOS 5.00 incorrectly fills the FCB fields when loading a program
          high; the first FCB is empty and the second contains the first
          parameter
        some DOS extenders place protected-mode values in various PSP fields
          such as the "parent" field, which can confuse PSP walkers.  Always
          check either for the CDh 20h signature or that the suspected PSP is
          at the beginning of a memory block which owns itself (the preceding
          paragraph should be a valid MCB with "owner" the same as the
          suspected PSP).
        Novell NetWare updates the fields at offsets 3Eh and 3Fh without
          checking that a legal PSP segment is current; see AH=50h for further
          discussion
        for 4DOS and Windows95, the command tail may be more than 126
          characters; in that case, the length byte will be set to 7Fh (with
          an 0Dh in the  127th position at offset FFh), and the first 126
          characters will be stored in the PSP, with the entire command line
          in the environment variable CMDLINE; under at least some versions
          of 4DOS, the byte at offset FFh is *not* set to 0Dh, so there is no
          terminating carriage return in the PSP's command tail.

Format of environment block:
Offset  Size    Description     (Table 01379)
 00h  N BYTEs   first environment variable, ASCIZ string of form "var=value"
      N BYTEs   second environment variable, ASCIZ string
        ...
      N BYTEs   last environment variable, ASCIZ string of form "var=value"
        BYTE    00h
---DOS 3.0+ ---
        WORD    number of strings following environment (normally 1)
      N BYTEs   ASCIZ full pathname of program owning this environment
                other strings may follow
--------D-2127-------------------------------
INT 21 - DOS 1+ - RANDOM BLOCK READ FROM FCB FILE
        AH = 27h
        CX = number of records to read
        DS:DX -> opened FCB (see #01345)
Return: AL = status
            00h successful, all records read
            01h end of file, no data read
            02h segment wrap in DTA, no data read
            03h end of file, partial read
        Disk Transfer Area filled with records read from file
        CX = number of records read (return AL = 00h or 03h)
Notes:  read begins at current file position as specified in FCB; the file
          position is updated after reading
        not supported by MS Windows 3.0 DOSX.EXE DOS extender
SeeAlso: AH=21h,AH=28h,AH=3Fh"DOS"
--------D-2128-------------------------------
INT 21 - DOS 1+ - RANDOM BLOCK WRITE TO FCB FILE
        AH = 28h
        CX = number of records to write
        DS:DX -> opened FCB (see #01345)
        Disk Transfer Area contains records to be written
Return: AL = status
            00h successful
            01h disk full or file read-only
            02h segment wrap in DTA
        CX = number of records written
Notes:  write begins at current file position as specified in FCB; the file
          position is updated after writing
        if CX = 0000h on entry, no data is written; instead the file size is
          adjusted to be the same as the file position specified by the random
          record and record size fields of the FCB
        if the data to be written is less than a disk sector, it is copied into
          a DOS disk buffer, to be written out to disk at a later time
        not supported by MS Windows 3.0 DOSX.EXE DOS extender
SeeAlso: AH=22h,AH=27h,AH=40h,AH=59h/BX=0000h
--------D-2129-------------------------------
INT 21 - DOS 1+ - PARSE FILENAME INTO FCB
        AH = 29h
        AL = parsing options (see #01380)
        DS:SI -> filename string (both '*' and '?' wildcards OK)
        ES:DI -> buffer for unopened FCB
Return: AL = result code
            00h successful parse, no wildcards encountered
            01h successful parse, wildcards present
            FFh failed (invalid drive specifier)
        DS:SI -> first unparsed character
        ES:DI buffer filled with unopened FCB (see #01345)
Notes:  asterisks expanded to question marks in the FCB
        all processing stops when a filename terminator is encountered
        cannot be used with filespecs which include a path (DOS 2+)
        Novell NetWare monitors the result code since an 'invalid drive' may
          signal an attempt to reconnect a network drive; if there are no
          connections to the specified drive, NetWare attempts to build a
          connection and map the drive to the SYS:LOGIN directory
SeeAlso: AH=0Fh,AH=16h,AH=26h

Bitfields for parsing options:
Bit(s)  Description     (Table 01380)
 0      skip leading separators
 1      use existing drive number in FCB if no drive is specified, instead of
          setting field to zero
 2      use existing filename in FCB if no base name is specified, instead of
          filling field with blanks
 3      use existing extension in FCB if no extension is specified, instead of
          filling field with blanks
 4-7    reserved (0)
--------D-212A-------------------------------
INT 21 - DOS 1+ - GET SYSTEM DATE
        AH = 2Ah
Return: CX = year (1980-2099)
        DH = month
        DL = day
---DOS 1.10+---
        AL = day of week (00h=Sunday)
SeeAlso: AH=2Bh"DOS",AH=2Ch,AH=E7h"Novell",INT 1A/AH=04h,INT 2F/AX=120Dh
--------D-212B-------------------------------
INT 21 - DOS 1+ - SET SYSTEM DATE
        AH = 2Bh
        CX = year (1980-2099)
        DH = month (1-12)
        DL = day (1-31)
Return: AL = status
            00h successful
            FFh invalid date, system date unchanged
Note:   DOS 3.3+ also sets CMOS clock; due to the limitations of the CLOCK$
          driver interface, the CMOS time is also updated to the current
          DOS time (which is the BIOS time-of-day clock with the default
          CLOCK$ driver)
SeeAlso: AH=2Ah,AH=2Dh,INT 1A/AH=05h
--------E-212B--CX4149-----------------------
INT 21 - AI Architects - ??? - INSTALLATION CHECK
        AH = 2Bh
        CX = 4149h ('AI')
        DX = 413Fh ('A?')
Return: AL <> FFh if installed
Note:   Borland's TKERNEL makes this call
--------c-212B--CX4358-----------------------
INT 21 - Super PC-Kwik v3.20+ - INSTALLATION CHECK
        AH = 2Bh
        CX = 4358h ('CX')
Return: AL = FFh if PC-Kwik/PC-Cache not installed
        AL = 00h if installed
            CF clear
            CX = 6378h ('cx')
            BX = ???
            DX = version (DH = major version, DL = binary minor version)
Note:   PC Tools PC-Cache v5.x and Qualitas Qcache v4.00 are OEM versions of
          Super PC-Kwik, and thus support this call (PC-Cache 5.1 corresponds
          to PC-Kwik v3.20)
SeeAlso: INT 13/AH=A0h,INT 13/AH=B0h,INT 16/AX=FFA5h/CX=1111h
Index:  PC-Cache;installation check|Qualitas Qcache;installation check
Index:  installation check;PC-Cache 5.x|installation check;Qualitas Qcache
--------Q-212B--CX4445-----------------------
INT 21 - DESQview - INSTALLATION CHECK
        AH = 2Bh
        CX = 4445h ('DE')
        DX = 5351h ('SQ')
        AL = subfunction (DV v2.00+)
            01h get version
                Return: BX = version (BH = major, BL = minor)
                Note: early copies of v2.00 return 0002h
            02h get shadow buffer info, and start shadowing
                Return: BH = rows in shadow buffer
                        BL = columns in shadow buffer
                        DX = segment of shadow buffer
            04h get shadow buffer info
                Return: BH = rows in shadow buffer
                        BL = columns in shadow buffer
                        DX = segment of shadow buffer
            05h stop shadowing
Return: AL = FFh if DESQview not installed
Notes:  in DESQview v1.x, there were no subfunctions; this call only identified
          whether or not DESQview was loaded.  DESQview v2.52 performs function
          01h for all subfunction requests 0Ch and higher and appears to ignore
          all lower-numbered functions not listed here.
        DESQview versions 2.50-2.52 are part of DESQview/X v1.0x; version 2.53
          is part of DESQview/X v1.10; and version 2.63 is part of DESQview/X
          v2.00.
BUG:    subfunction 05h does not appear to work correctly in DESQview 2.52
SeeAlso: INT 10/AH=FEh,INT 10/AH=FFh,INT 15/AX=1024h,INT 15/AX=DE30h
--------U-212B--CX454C-----------------------
INT 21 - ELRES v1.1 - INSTALLATION CHECK
        AH = 2Bh
        CX = 454Ch ('EL')
        DX = 5253h ('RS')
Return: ES:BX -> ELRES history structure (see #01381)
        DX = DABEh (signature, DAve BEnnett)
Program: ELRES is an MS-DOS return code (errorlevel) recorder by David H.
          Bennett which stores recent errorlevel values, allows them to be
          retrieved for use in batch files, and can place them in an
          environment variable
SeeAlso: AH=4Bh"ELRES",AH=4Dh

Format of ELRES history structure:
Offset  Size    Description     (Table 01381)
 00h    WORD    number of return codes which can be stored by following buffer
 02h    WORD    current position in buffer (treated as a ring)
 04h  N BYTEs   ELRES buffer
--------l-212B00CX5643-----------------------
INT 21 - The Volkov Commander - GET POINTER TO LEFT PANEL DATA STRUCTURE
        AX = 2B00h
        CX = 5643h ('VC')
        DX = 4F4Dh ('OM')
Return: AL = 0
        ES:BX -> left panel data structure
Program: Volcov Commander is a shell for MS-DOS by Vsevolod V. Volkov
SeeAlso: AX=2B01h/CX=5643h,AX=2B02h/CX=5643h
--------l-212B01CX5643-----------------------
INT 21 - The Volkov Commander - GET POINTER TO RIGHT PANEL DATA STRUCTURE
        AX = 2B01h
        CX = 5643h ('VC')
        DX = 4F4Dh ('OM')
Return: AL = 0
        ES:BX -> right panel data structure
SeeAlso: AX=2B00h/CX=5643h,AX=2B02h/CX=5643h
--------l-212B02CX5643-----------------------
INT 21 - The Volkov Commander - GET POINTER TO GLOBAL VARIABLES
        AX = 2B02h
        CX = 5643h ('VC')
        DX = 4F4Dh ('OM')
Return: AL = 0
        ES:BX -> global variables
SeeAlso: AX=2B00h/CX=5643h,AX=2B01h/CX=5643h
--------m-212B01CX444D-----------------------
INT 21 - Quarterdeck DOS-UP.SYS v2.00 - INSTALLATION CHECK
        AX = 2B01h
        CX = 444Dh ('DM')
        DX = 4158h ('AX')
Return: AX = 0000h if installed
            BX = DOS-UP version (BH = minor, BL = major)
            CX = 4845h ('HE')
            DX = 5245h ('RE')
            ES = DOS-UP driver segment
--------T-212B01CX5441-----------------------
INT 21 - TAME v2.10+ - INSTALLATION CHECK
        AX = 2B01h
        CX = 5441h ('TA')
        DX = 4D45h ('ME')
---v2.60---
        BH = ???
            00h skip ???, else do
Return: AL = 02h if installed
        ES:DX -> data area in TAME-RES (see #01382,#01386,#01388)
Program: TAME is a shareware program by David G. Thomas which gives up CPU
          time to other partitions under a multitasker when the current
          partition's program incessantly polls the keyboard or system time

Format of TAME 2.10-2.20 data area:
Offset  Size    Description     (Table 01382)
 00h    BYTE    data structure minor version number (01h in TAME 2.20)
 01h    BYTE    data structure major version number (07h in TAME 2.20)
 02h    DWORD   number of task switches
 06h    DWORD   number of keyboard polls
 0Ah    DWORD   number of time polls
 0Eh    DWORD   number of times DESQview told program runs only in foreground
 12h    DWORD   original INT 10h
 16h    DWORD   original INT 14h
 1Ah    DWORD   original INT 15h
 1Eh    DWORD   original INT 16h
 22h    DWORD   original INT 17h
 26h    DWORD   original INT 21h
 2Ah    DWORD   original INT 28h
 2Eh    WORD    offset of TAME INT 10h handler
 30h    WORD    offset of TAME INT 14h handler
 32h    WORD    offset of TAME INT 15h handler
 34h    WORD    offset of TAME INT 16h handler
 36h    WORD    offset of TAME INT 17h handler
 38h    WORD    offset of TAME INT 21h handler
 3Ah    WORD    offset of TAME INT 28h handler
 3Ch    WORD    X in /max:X,Y or /freq:X,Y
 3Eh    WORD    Y in /max:X,Y or /freq:X,Y
 40h    WORD    number of polls remaining before next task switch
 42h    WORD    /KEYIDLE value
 44h    BYTE    interrupts already grabbed by TAME (see #01383)
 45h    BYTE    flags for interrupts which may be acted on (same bits as above)
 46h    BYTE    TAME enabled (01h) or disabled (00h)
 47h    BYTE    /TIMEPOLL (01h) or /NOTIMEPOLL (00h)
 48h    BYTE    /NOTIMER (01h) or /TIMER (00h)
 49h    BYTE    window or task number for this task
 4Ah    BYTE    multitasker type (see #01384)
 4Bh    BYTE    type of task switching selected
                bit 0: DESQview???
                bit 1: DoubleDOS???
                bit 2: TopView???
                bit 3: KeySwitch
                bit 4: HLT instruction
 4Ch    BYTE    ???
 4Dh    BYTE    flags
                bit 1: /FREQ instead of /MAX
 4Eh    BYTE    /FG: value
 4Fh    BYTE    task switches left until next FGONLY DESQview API call
 50h    BYTE    ???

Bitfields for interrupts already grabbed by TAME:
Bit(s)  Description     (Table 01383)
 0      INT 10h
 1      INT 14h
 2      INT 15h
 3      INT 16h
 4      INT 17h
 5      INT 21h
 6      INT 28h

(Table 01384)
Values for multitasker type:
 01h    DESQview
 02h    DoubleDOS
 03h    TopView
 04h    OmniView
 05h    VM/386

Bitfields for type of task switching selected:
Bit(s)  Description     (Table 01385)
 0      DESQview
 1      DoubleDOS
 2      TopView
 3      OmniView
 4      KeySwitch
 5      HLT instruction

Format of TAME 2.30 data area:
Offset  Size    Description     (Table 01386)
 00h    BYTE    data structure minor version number (02h in TAME 2.30)
 01h    BYTE    data structure major version number (0Ah in TAME 2.30)
 02h    DWORD   number of task switches
 06h    DWORD   number of keyboard polls
 0Ah    DWORD   number of time polls
 0Eh    DWORD   number of times DESQview told program runs only in foreground
 12h    DWORD   time of last /CLEAR or TAME-RES load
 16h    DWORD   time yielded
 1Ah    DWORD   time spent polling
 1Eh    DWORD   time spent waiting on key input with INT 16/AH=01h,11h
 22h    DWORD   original INT 10h
 26h    DWORD   original INT 14h
 2Ah    DWORD   original INT 15h
 2Eh    DWORD   original INT 16h
 32h    DWORD   original INT 17h
 36h    DWORD   original INT 21h
 3Ah    DWORD   original INT 28h
 3Eh    WORD    offset of TAME INT 10h handler
 40h    WORD    offset of TAME INT 14h handler
 42h    WORD    offset of TAME INT 15h handler
 44h    WORD    offset of TAME INT 16h handler
 46h    WORD    offset of TAME INT 17h handler
 48h    WORD    offset of TAME INT 21h handler
 4Ah    WORD    offset of TAME INT 28h handler
 4Ch    WORD    X in /max:X,Y or /freq:X,Y
 4Eh    WORD    Y in /max:X,Y or /freq:X,Y
 50h    WORD    number of polls remaining before next task switch
 52h    WORD    /KEYIDLE value
 54h    WORD    /FG: value
 56h    WORD    task switches left until next FGONLY DESQview API call
 58h    WORD    multitasker version
 5Ah    WORD    virtual screen segment
 5Ch    BYTE    interrupts already grabbed by TAME (see #01383)
 5Dh    BYTE    flags for interrupts which may be acted on (same bits as above)
 5Eh    BYTE    window or task number for this task
 5Fh    BYTE    multitasker type (see #01384)
 60h    BYTE    type of task switching selected (bit flags) (see #01385)
 61h    BYTE    watch_DOS
 62h    BYTE    action flags (see #01387)
 63h    BYTE    old status
 64h    WORD    signature DA34h

Bitfields for TAME action flags:
Bit(s)  Description     (Table 01387)
 0      TAME enabled
 1      /FREQ instead of /MAX (X and Y count fields are per tick)
 2      /TIMEPOLL
 3      /KEYPOLL
 4      inhibit timer
 5      enable status monitoring
SeeAlso: #01386,#01388

Format of TAME 2.60 data area:
Offset  Size    Description     (Table 01388)
 00h    BYTE    data structure minor version number (02h in TAME 2.60)
 01h    BYTE    data structure major version number (0Bh in TAME 2.60)
 02h    DWORD   number of task switches
 06h    DWORD   number of keyboard polls
 0Ah    DWORD   number of time polls
 0Eh    DWORD   number of times DESQview told program runs only in foreground
 12h    DWORD   time of last /CLEAR or TAME-RES load
 16h    DWORD   time yielded
 1Ah    DWORD   time spent polling
 1Eh    DWORD   time spent waiting on key input with INT 16/AH=01h,11h
 22h  4 BYTEs   ???
 26h    DWORD   original INT 10h
 2Ah    DWORD   original INT 14h
 2Eh    DWORD   original INT 15h
 32h    DWORD   original INT 16h
 36h    DWORD   original INT 17h
 3Ah    DWORD   original INT 21h
 3Eh    DWORD   original INT 28h
 42h    WORD    offset of TAME INT 10h handler
 44h    WORD    offset of TAME INT 14h handler
 46h    WORD    offset of TAME INT 15h handler
 48h    WORD    offset of TAME INT 16h handler
 4Ah    WORD    offset of TAME INT 17h handler
 4Ch    WORD    offset of TAME INT 21h handler
 4Eh    WORD    offset of TAME INT 28h handler
 50h    WORD    X in /max:X,Y or /freq:X,Y
 52h    WORD    Y in /max:X,Y or /freq:X,Y
 54h    WORD    number of polls remaining before next task switch
 56h    WORD    /KEYIDLE value
 58h  4 BYTEs   ???
 5Ch    WORD    X in /boost:X,Y
 5Eh    WORD    Y in /boost:X,Y
 60h    WORD    /FG: value
 62h    WORD    task switches remaining until next FGONLY DESQview API call
 64h    WORD    multitasker version ???
 66h    WORD    virtual screen segment
 68h    BYTE    interrupts already grabbed by TAME (see #01383)
 69h    BYTE    flags for interrupts which may be acted on (same bits as above)
 6Ah    BYTE    window or task number for this task
 6Bh    BYTE    multitasker type (see #01384)
 6Ch    BYTE    type of task switching selected (bit flags) (see #01385)
 6Dh    BYTE    watch_DOS
 6Eh    BYTE    action flags (see #01387)
 6Fh    BYTE    old status
 70h    WORD    signature DA34h
--------v-212B16CX0643-----------------------
INT 21 - VIRUS - "Maltese Amoeba" - INSTALLATION CHECK
        AX = 2B16h
        CX = 0643h
Return: AX = 1603h if installed
--------R-212B44BX4D41-----------------------
INT 21 - pcANYWHERE IV/LAN - INSTALLATION CHECK
        AX = 2B44h ('D')
        BX = 4D41h ('MA')
        CX = 7063h ('pc')
        DX = 4157h ('AW')
Return: AX = resident program
            4F4Bh ('OK') if large host resident
            6F6Bh ('ok') if small host resident
        CX:DX -> API entry point (see #01389)
SeeAlso: INT 16/AH=79h

(Table 01389)
Call pcANYWHERE API entry point with:
        AX = 0000h get pcANYWHERE IV version
            DS:SI -> BYTE buffer for host type code
            Return: AH = version number
                    AL = revision number
                    DS:DI buffer byte filled with
                        00h full-featured host
                        01h limited-feature LAN host
                        other API may not be supported
        AX = 0001h initialize operation
            DS:SI -> initialization request structure (see #01390)
            Return: AX = function status (see #01393)
        AX = 0002h get status
            Return: AH = current operating mode (see #01390)
                    AL = current connection status (see #01392)
        AX = 0003h suspend remote screen updates
            Return: AX = function status (see #01393)
        AX = 0004h resume screen updates
            Return: AX = function status (see #01393)
        AX = 0005h end current remote access session
            DS:SI -> termination request structure (see #01391)
            Return: AX = function status (see #01393)
        AX = 0006h remove pcANYWHERE IV from memory
            Return: AX = status (see #01393)
        AX = 8000h read data from communications channel
            DS:BX -> buffer
            CX = buffer size
            Return: AX >= number of characters read/available
                    AX < 0 on error
        AX = 8001h write data to communications channel
            DS:BX -> buffer
            CX = buffer size
            Return: AX >= number of characters written
                    AX < 0 on error
        AX = 8002h get connection status
            Return: AX = status
                        > 0000h if connection active
                        = 0000h if connection lost
                        < 0000h on error

Format of pcANYWHERE initialization request structure:
Offset  Size    Description     (Table 01390)
 00h    BYTE    operating mode
                00h wait for a call
                01h hot key activates
                02h incoming call activates
                03h initiate a call
 01h  3 BYTEs   user ID to append to config file names
 04h    WORD    DS-relative pointer to path for config files
 06h    WORD    DS-relative pointer to path for program files

Format of pcANYWHERE termination request structure:
Offset  Size    Description     (Table 01391)
 00h    BYTE    operating mode after termination
                00h wait for a call
                01h hot key activates
                02h incoming call activates
                80h use current mode
                FFh remove from memory

Bitfields for current connection status:
Bit(s)  Description     (Table 01392)
 0      a physical connection is active
 1      remove screen updating is active
 2      connection checking is active
 3      hot key detection is active
 4      background file transfer is active

(Table 01393)
Values for pcANYWHERE function status:
 0000h  function completed successfully
 FFD1h  unable to release interrupt vectors
 FFD2h  unable to release allocated memory
 FFF2h  unable to establish a connection when operating mode is
          "Initiate a call"
 FFF3h  modem configuration is invalid (corrupt config)
 FFF4h  modem initialization failed (no modem response)
 FFF5h  the communications device could not be initialized
 FFF6h  the host operator aborted the function
 FFF7h  the communications driver type specified in the configuration file is
          different than the one loaded when pcANYWHERE IV was started
 FFF9h  the configuration file is invalid
 FFFAh  the configuration file could not be found
 FFFBh  no session is active
 FFFCh  a remote access session is active
 FFFDh  the specified operating mode is invalid
--------l-212B--CX5643-----------------------
INT 21 - Volkov Commander - INSTALLATION CHECK
        AH = 2Bh
        CX = 5643h ('VC')
        DX = 4F4Dh ('OM')
        AL = function number
            00h get left window data address
            01h get right window data address
            02h get address of general variables
Return: AL = 00h if Volkov Commander installed
            AH = version code (27h for v4.00.039)
            ES:BX -> requested data
Program: Volkov Commander is a Norton Commander-like DOS shell
--------G-212B--CX6269-----------------------
INT 21 - WDTSR.COM - INSTALLATION CHECK
        AH = 2Bh
        CX = 6269h ('bi')
        DX = 742Dh ('t-')
Return: AL = FFh if not installed
        AL = 77h ('w') if WDTSR is installed
            CX = 6174h ('at')
            DX = 6368h ('ch')
            ES = resident code segment
            ES:DI -> identification and configuration data
Program: WDTSR is a driver for the bitWatch watchdog hardware by bit-design
          GmbH
SeeAlso: AH=2Bh/CX=6269h"bitFOSSI",INT 14/AH=14h"FOSSIL",INT 15/AH=C3h
--------S-212B--CX6269-----------------------
INT 21 - bitFOSS - INSTALLATION CHECK
        AH = 2Bh
        CX = 6269h ('bi')
        DX = 7446h ('tF')
Return: AL = FFh if not installed
        AL = 4Fh ('O') if bitFOSS is installed
            CX = 5353h ('SS')
            DX = 494Ch ('IL')
            ES = resident code segment
            ES:DI -> identification data
Program: bitFOSS is a revision 5 FOSSIL driver
SeeAlso: AH=2Bh/CX=6269h"bitFOSSI",INT 11/AH=BCh
--------S-212B--CX6269-----------------------
INT 21 - bitFOSSI - INSTALLATION CHECK
        AH = 2Bh
        CX = 6269h ('bi')
        DX = 7449h ('tI')
Return: AL = FFh if not installed
        AL = 53h ('S') if bitFOSSI is installed
            CX = 444Eh ('DN')
            DX = 2D46h ('-F')
            ES = resident code segment
            ES:DI -> identification data
Program: bitFOSSI is a revision 5 FOSSIL driver for ???'s ISDN board
SeeAlso: AH=2Bh/CX=6269h"bitFOSS",INT 11/AH=BCh
--------D-212C-------------------------------
INT 21 - DOS 1+ - GET SYSTEM TIME
        AH = 2Ch
Return: CH = hour
        CL = minute
        DH = second
        DL = 1/100 seconds
Note:   on most systems, the resolution of the system clock is about 5/100sec,
          so returned times generally do not increment by 1
        on some systems, DL may always return 00h
SeeAlso: AH=2Ah,AH=2Dh,AH=E7h"Novell",INT 1A/AH=00h,INT 1A/AH=02h,INT 1A/AH=FEh
SeeAlso: INT 2F/AX=120Dh
--------v-212C--------------------------
INT 21 - VIRUS - "Anti Pode 2.0" - INSTALLATION CHECK
        AH = 2Ch
Return: DL = F2h if resident
SeeAlso: AX=1812h"VIRUS",AX=2C2Ch
--------v-212C00CX534B-----------------------
INT 21 - SKUDO - INSTALLATION CHECK
        AX = 2C00h
        CX = 534Bh ('SK')
        DX = 5544h ('UD')
        BX = 4F21h ('O!')
Return: AX = 5349h ('SI') if installed
            CH = version number
            CL = subversion
Program: SKUDO is an antivirus TSR by Jordi Mas
--------v-212C2C------------------------
INT 21 - VIRUS - "LockJaw/Proto-T" - INSTALLATION CHECK
        AX = 2C2Ch
Return: AX = 0DCDh if resident
SeeAlso: AH=2Ch"VIRUS",AX=3000h"VIRUS"
--------D-212D-------------------------------
INT 21 - DOS 1+ - SET SYSTEM TIME
        AH = 2Dh
        CH = hour
        CL = minute
        DH = second
        DL = 1/100 seconds
Return: AL = result
            00h successful
            FFh invalid time, system time unchanged
Note:   DOS 3.3+ also sets CMOS clock; due to the limitations of the CLOCK$
          driver interface, the CMOS date is also updated to the current
          DOS date
SeeAlso: AH=2Bh"DOS",AH=2Ch,INT 1A/AH=01h,INT 1A/AH=03h,INT 1A/AH=FFh"AT&T"
--------T-212D01CX7820-----------------------
INT 21 - PC-Mix - INSTALLATION CHECK
        AX = 2D01h
        CX = 7820h ('X ')
        DX = 6D69h ('MI')
Return: AL = 00h if installed
--------D-212E--DL00-------------------------
INT 21 - DOS 1+ - SET VERIFY FLAG
        AH = 2Eh
        DL = 00h (DOS 1.x/2.x only)
        AL = new state of verify flag
            00h off
            01h on
Notes:  default state at system boot is OFF
        when ON, all disk writes are verified provided the device driver
          supports read-after-write verification
SeeAlso: AH=54h
--------D-212F-------------------------------
INT 21 - DOS 2+ - GET DISK TRANSFER AREA ADDRESS
        AH = 2Fh
Return: ES:BX -> current DTA
Note:   under the FlashTek X-32 DOS extender, the pointer is in ES:EBX
SeeAlso: AH=1Ah
--------D-2130-------------------------------
INT 21 - DOS 2+ - GET DOS VERSION
        AH = 30h
---DOS 5+ ---
        AL = what to return in BH
            00h OEM number (as for DOS 2.0-4.0x)
            01h version flag
Return: AL = major version number (00h if DOS 1.x)
        AH = minor version number
        BL:CX = 24-bit user serial number (most versions do not use this)
---if DOS <5 or AL=00h---
        BH = MS-DOS OEM number (see #01394)
---if DOS 5+ and AL=01h---
        BH = version flag
            bit 3: DOS is in ROM
            other: reserved (0)
Notes:  the OS/2 v1.x Compatibility Box returns major version 0Ah (10)
        the OS/2 v2.x Compatibility Box returns major version 14h (20)
        OS/2 Warp 3.0 Virtual DOS Machines report v20.30; Warp 4 VDMs report
          v20.40.
        the WindowsNT DOS box returns version 5.00, subject to SETVER
        DOS 4.01 and 4.02 identify themselves as version 4.00; use
          INT 21/AH=87h to distinguish between the original European MS-DOS 4.0
          and the later PC-DOS 4.0x and MS-DOS 4.0x
        IBM DOS 6.1 reports its version as 6.00; use the OEM number to
          distinguish between MS-DOS 6.00 and IBM DOS 6.1 (there was never an
          IBM DOS 6.0)
        MS-DOS 6.21 reports its version as 6.20; version 6.22 returns the
          correct value
        Windows95 returns version 7.00 (the underlying MS-DOS), as did the
          "Chicago" beta (reported in _Microsoft_Systems_Journal_,August 1994);
          Windows95 OSR2 returns version 7.10
        DR DOS 5.0 and 6.0 report version 3.31; Novell DOS 7 reports IBM v6.00,
          which some software displays as IBM DOS v6.10 (because of the version
          mismatch in true IBM DOS, as mentioned above).  The Novell DOS 7
          SETVER.EXE has an undocumented option /G x.y which sets the "global"
          DOS version returned by this function for all executables not given
          a specific version number in SETVER to major version x and minor
          version y.
        generic MS-DOS 3.30, Compaq MS-DOS 3.31, and others identify themselves
          as PC-DOS by returning OEM number 00h
        the version returned under DOS 4.0x may be modified by entries in
          the special program list (see #01662 at AH=52h); the version returned
          under DOS 5+ may be modified by SETVER--use AX=3306h to get the true
          version number
SeeAlso: AX=3000h/BX=3000h,AX=3306h,AX=4452h,AH=87h,INT 15/AX=4900h
SeeAlso: INT 2F/AX=122Fh,INT 2F/AX=4010h,INT 2F/AX=4A33h,INT 2F/AX=E002h

(Table 01394)
Values for DOS OEM number:
 00h    IBM
 01h    Compaq
 02h    MS Packaged Product
 04h    AT&T
 05h    ZDS (Zenith Electronics)
 06h    Hewlett-Packard
 07h    ZDS (Groupe Bull)
 0Dh    Packard-Bell
 16h    DEC
 23h    Olivetti
 28h    Texas Instruments
 29h    Toshiba
 33h    Novell (Windows/386 device IDs only)
 34h    MS Multimedia Systems (Windows/386 device IDs only)
 35h    MS Multimedia Systems (Windows/386 device IDs only)
 4Dh    Hewlett-Packard
 5Eh    RxDOS
 66h    PhysTechSoft (PTS-DOS)
 99h    General Software's Embedded DOS
 EEh    DR DOS
 EFh    Novell DOS
 FDh    FreeDOS
 FFh    Microsoft, Phoenix
--------E-2130-------------------------------
INT 21 - Phar Lap 386/DOS-Extender, Intel Code Builder - INSTALLATION CHECK
        AH = 30h
        EAX = 00003000h
        EBX = 50484152h ("PHAR")
Return: AL = major DOS version
        AH = minor DOS version
        EAX bits 31-16 = 4458h ('DX') if 386/DOS-extender installed
            BL = ASCII major version number
        EAX bits 31-16 = 4243h ('BC') if Intel Code Builder installed
            EDX = address of GDA
SeeAlso: AX=2501h,AX=FF00h,INT 2F/AX=F100h
--------v-2130--DXABCD-----------------------
INT 21 - VIRUS - "Possessed" - INSTALLATION CHECK
        AH = 30h
        DX = ABCDh
Return: DX = DCBAh if installed
SeeAlso: AX=0D20h,AH=30h/SI=1234h,AX=3000h"VIRUS",AX=30F1h
--------v-2130--SI1234---------------------
INT 21 - VIRUS - "ANDROMEDA-758" -INSTALLATION CHECK
        AH = 30h
        SI = 1234h
Return: AX = FFDDh if resident
SeeAlso: AH=30h/DX=ABCDh,AX=3000h"VIRUS"
--------T-213000BX1234-----------------------
INT 21 - CTask 2.0+ - INSTALLATION CHECK
        AX = 3000h
        BX = 1234h
        DS:DX -> 8-byte version string (DX < FFF0h) "CTask21",00h for v2.1-2.2
Return: AL = DOS major version
        AH = DOS minor version
        CX:BX -> Ctask global data block
Program: CTask is a multitasking kernel for C written by Thomas Wagner
Note:   if first eight bytes of returned data block equal eight bytes passed
          in, CTask is resident
--------O-213000BX3000-----------------------
INT 21 - PC-MOS/386 v3.0 - INSTALLATION CHECK/GET VERSION
        AX = 3000h
        BX = 3000h
        CX = DX = 3000h
Return: AX = PC-MOS version
Program: PC-MOS/386 is a multitasking/multiuser MS-DOS-compatible operating
          system by The Software Link, Inc.
SeeAlso: AH=30h,INT D4/AH=02h,INT D4/AH=10h
--------v-213000BX614A------------------
INT 21 - VIRUS - "Jackal" - INSTALLATION CHECK
        AX = 3000h
        BX = 614Ah ('aJ')
        CX = 6B63h ('kc')
        DX = 6C61h ('la')
Return: BX = ???
SeeAlso: AX=2C2Ch"VIRUS",AX=3030h"VIRUS"
--------G-213022-----------------------------
INT 21 - StopPrg v2.0 - INSTALLATION CHECK
        AX = 3022h
Return: AX = DOS version (see AH=30h)
        CX = 1112h if StopPrg installed
            BX = segment of resident code
Program: StopPrg is a resident program aborter by MAK-TRAXON's Prophet
Note:   StopPrg may be temporarily disabled by storing 9090h in the word at
          0000h:04FEh
--------v-213030BX694D-----------------------
INT 21 - VIRUS - "IMTC" -INSTALLATION CHECK
        AX = 3030h
        BX = 694Dh
Return: DX = 7443h if resident
SeeAlso: AX=3000h/BX=614Ah"VIRUS",AX=3032h"VIRUS"
--------v-213032DX1234-----------------------
INT 21 - VIRUS - "Uruguay" - INSTALLATION CHECK
        AX = 3032h
        DX = 1234h
Return: AX = 5678h if resident
SeeAlso: AX=3030h"VIRUS",AX=30F1h"VIRUS"
--------v-2130F1-----------------------------
INT 21 - VIRUS - "Dutch-555"/"Quit 1992" - INSTALLATION CHECK
        AX = 30F1h
Return: AL = 00h if resident
SeeAlso: AH=30h/DX=ABCDh,AX=3032h,AX=330Fh,AX=33DAh
----------2130FFCX4445-----------------------
INT 21 - DESQ??? - INSTALLATION CHECK
        AX = 30FFh
        CX = 4445h ("DE")
        DX = 5351h ("SQ")
Return: BH = 05h if installed
        ???
Note:   called by DUBLDISK.COM v2.6; this function is not supported by
          DESQview, so it may be for DESQview's precursor DESQ.
SeeAlso: AX=4404h"DUBLDISK"
--------D-2131-------------------------------
INT 21 - DOS 2+ - TERMINATE AND STAY RESIDENT
        AH = 31h
        AL = return code
        DX = number of paragraphs to keep resident
Return: never
Notes:  the value in DX only affects the memory block containing the PSP;
          additional memory allocated via AH=48h is not affected
        the minimum number of paragraphs which will remain resident is 11h
          for DOS 2.x and 06h for DOS 3.0+
        most TSRs can save some memory by releasing their environment block
          before terminating (see #01378 at AH=26h,AH=49h)
        any open files remain open, so one should close any files which will
          not be used before going resident; to access a file which is left
          open from the TSR, one must switch PSP segments first (see AH=50h)
SeeAlso: AH=00h,AH=4Ch,AH=4Dh,INT 20,INT 22,INT 27
--------D-2132-------------------------------
INT 21 - DOS 2+ - GET DOS DRIVE PARAMETER BLOCK FOR SPECIFIC DRIVE
        AH = 32h
        DL = drive number (00h = default, 01h = A:, etc)
Return: AL = status
            00h successful
                DS:BX -> Drive Parameter Block (DPB) (see #01395) for specified
                          drive
            FFh invalid or network drive
Notes:  the OS/2 compatibility box supports the DOS 3.3 version of this call
          except for the DWORD at offset 12h
        this call updates the DPB by reading the disk; the DPB may be accessed
          via the DOS list of lists (see #01627 at AH=52h) if disk access is not
          desirable.
        undocumented prior to the release of DOS 5.0; only the DOS 4.0+
          version of the DPB has been documented, however
        supported by DR DOS 3.41+; DR DOS 3.41-6.0 return the same data as
          MS-DOS 3.31
        IBM ROM-DOS v4.0 also reports invalid/network (AL=FFh) on the ROM drive
SeeAlso: AH=1Fh,AH=52h,AX=7302h

Format of DOS Drive Parameter Block:
Offset  Size    Description     (Table 01395)
 00h    BYTE    drive number (00h = A:, 01h = B:, etc)
 01h    BYTE    unit number within device driver
 02h    WORD    bytes per sector
 04h    BYTE    highest sector number within a cluster
 05h    BYTE    shift count to convert clusters into sectors
 06h    WORD    number of reserved sectors at beginning of drive
 08h    BYTE    number of FATs
 09h    WORD    number of root directory entries
 0Bh    WORD    number of first sector containing user data
 0Dh    WORD    highest cluster number (number of data clusters + 1)
                16-bit FAT if greater than 0FF6h, else 12-bit FAT
 0Fh    BYTE    number of sectors per FAT
 10h    WORD    sector number of first directory sector
 12h    DWORD   address of device driver header (see #01646)
 16h    BYTE    media ID byte (see #01356)
 17h    BYTE    00h if disk accessed, FFh if not
 18h    DWORD   pointer to next DPB
---DOS 2.x---
 1Ch    WORD    cluster containing start of current directory, 0000h=root,
                FFFFh = unknown
 1Eh 64 BYTEs   ASCIZ pathname of current directory for drive
---DOS 3.x---
 1Ch    WORD    cluster at which to start search for free space when writing
 1Eh    WORD    number of free clusters on drive, FFFFh = unknown
---DOS 4.0-6.0---
 0Fh    WORD    number of sectors per FAT
 11h    WORD    sector number of first directory sector
 13h    DWORD   address of device driver header (see #01646)
 17h    BYTE    media ID byte (see #01356)
 18h    BYTE    00h if disk accessed, FFh if not
 19h    DWORD   pointer to next DPB
 1Dh    WORD    cluster at which to start search for free space when writing,
                usually the last cluster allocated
 1Fh    WORD    number of free clusters on drive, FFFFh = unknown
SeeAlso: #01357,#01663,#01787 at AX=7302h,#04039 at INT E0/CL=71h
--------D-2133-------------------------------
INT 21 - DOS 2+ - EXTENDED BREAK CHECKING
        AH = 33h
        AL = subfunction
            00h get current extended break state
                Return: DL = current state, 00h = off, 01h = on
            01h set state of extended ^C/^Break checking
                DL = new state
                    00h off, check only on character I/O functions
                    01h on, check on all DOS functions
                Return: (Novell DOS 7) DL = old state of extended Break checks
Note:   under DOS 3.1+ and DR DOS, this function does not use any of the
          DOS-internal stacks and may thus be called at any time
SeeAlso: AX=3302h
--------D-213302-----------------------------
INT 21 - DOS 3.x+ internal - GET AND SET EXTENDED CONTROL-BREAK CHECKING STATE
        AX = 3302h
        DL = new state (00h for OFF, 01h for ON)
Return: DL = old state of extended BREAK checking
Notes:  this function does not use any of the DOS-internal stacks and may thus
          be called at any time; one possible use is modifying Control-Break
          checking from within an interrupt handler or TSR
        not supported by DR DOS through version 6.0 (error code 01h);
          newly-supported by Novell DOS 7
SeeAlso: AH=33h
--------D-213303-----------------------------
INT 21 - DOS 4.0+ - UNUSED
        AX = 3303h
Return: nothing
Note:   this function and AX=3304h were intended to support a proposed
          code-page switching flag (using two of the ten reserved bytes in
          the DOS directory entry for codepage information); however, this
          function has always been a NOP in public releases of DOS and OS/2.
          See _DOS_Internals_ Chapter 2 for more information
SeeAlso: AX=3304h
--------D-213304-----------------------------
INT 21 - DOS 4.0+ - UNUSED
        AX = 3304h
Return: nothing
Note:   this function and AX=3303h were intended to support a proposed
          code-page switching flag (using two of the ten reserved bytes in
          the DOS directory entry for codepage information); however, this
          function has always been a NOP in public releases of DOS and OS/2.
          See _DOS_Internals_ Chapter 2 for more information
SeeAlso: AX=3303h
--------D-213305-----------------------------
INT 21 - DOS 4.0+ - GET BOOT DRIVE
        AX = 3305h
Return: DL = boot drive (1=A:,...)
Notes:  fully reentrant
        NEC 9800-series PCs always call the boot drive A: and assign the other
          drive letters sequentially to the other drives in the system
        this call is supported by OS/2 Warp 3.0, but not earlier versions of
          OS/2; it is also supported by Novell DOS 7
--------D-213306-----------------------------
INT 21 - DOS 5+ - GET TRUE VERSION NUMBER
        AX = 3306h
Return: BL = major version
        BH = minor version
        DL = revision (bits 2-0, all others 0)
        DH = version flags
            bit 3: DOS is in ROM
            bit 4: DOS is in HMA
        AL = FFh if true DOS version < 5.0
Notes:  this function always returns the true version number, unlike AH=30h,
          whose return value may be changed with SETVER
        because of the conflict from the CBIS redirector (see next
          entry), programs should check whether BH is less than 100 (64h)
          and BL is at least 5 before accepting the returned BX as the true
          version number; however, even this is not entirely reliable when
          that redirector is loaded
        fully reentrant
        OS/2 v2.1 will return BX=0A14h (version 20.10)
        the Windows NT DOS box returns BX=3205h (version 5.50)
        Novell DOS 7 returns IBM v6.00, which some software displays as
          IBM DOS v6.10 (because of the version mismatch in true IBM DOS
          mentioned for INT 21/AH=30h); versions through Update 15 all
          return revision code 00h
        Windows95 and Windows95 SP1 return version 7.00; Windows95 OSR2 returns
          version 7.10
BUG:    DR DOS 5.0 and 6.0 return CF set/AX=0001h for INT 21/AH=33h
          subfunctions other than 00h-02h and 05h, while MS-DOS returns AL=FFh
          for invalid subfunctions
SeeAlso: AH=30h,INT 2F/AX=122Fh,INT 2F/AX=E000h"SETDRVER"
--------N-213306-----------------------------
INT 21 - CBIS network - NETWORK REDIRECTOR - ???
        AX = 3306h
Return: AX = 3306h
        BL = ??? (usually 00h)
        BH = ??? (usually 00h or FFh)
Note:   unknown function, is in conflict with DOS 5+ version call
SeeAlso: AX=3306h"DOS"
--------D-213307-----------------------------
INT 21 - Windows95 - SET/CLEAR DOS_FLAG
        AX = 3307h
        DL = subfunction
            00h clear bit 5 of "DOS_FLAG"
            01h set bit 5 of "DOS_FLAG"
Return: ???
--------v-21330F-----------------------------
INT 21 - VIRUS - "Burghofer" - INSTALLATION CHECK
        AX = 330Fh
Return: AL = 0Fh if resident (DOS returns AL=FFh)
SeeAlso: AX=30F1h,AX=33DAh,AX=33E0h
--------k-213341-----------------------------
INT 21 - Diet Disk v1.0 - INSTALLATION CHECK
        AX = 3341h
Return: DX = 1234h if installed
            CX = resident code segment
Program: Diet Disk is a public domain transparent data file compressor by
          Barry Nance
--------v-2133DA------------------------
INT 21 - VIRUS - "CoffeeShop" - INSTALLATION CHECK
        AX = 33DAh
Return: AH = A5h if resident
            AL = virus version
SeeAlso: AX=33DB,AX=33DCh,AX=330Fh,AX=33E0h,AX=5643h"VIRUS"
--------v-2133DB------------------------
INT 21 - VIRUS - "CoffeeShop" - GENERATE RANDOM NUMBER
        AX = 33DBh
Return: ???
SeeAlso: AX=33DAh,AX=33DCh
--------v-2133DC------------------------
INT 21 - VIRUS - "CoffeeShop" - DISPLAY "LEGALIZE CANNABIS" GRAPHIC
        AX = 33DCh
Return: ???
SeeAlso: AX=33DAh,AX=33DBh
--------v-2133E0-----------------------------
INT 21 - VIRUS - "Oropax" - INSTALLATION CHECK
        AX = 33E0h
Return: AL = E0h if resident (DOS returns AL=FFh)
SeeAlso: AX=330Fh,AX=33DAh,AX=357Fh
--------D-2134-------------------------------
INT 21 - DOS 2+ - GET ADDRESS OF INDOS FLAG
        AH = 34h
Return: ES:BX -> one-byte InDOS flag
Notes:  this function executes on the DOS stack, and thus cannot be called
          while another DOS function is already executing; you should use
          this function once at the beginning of the program and store the
          returned pointer rather than calling it when requiring DOS access
        the value of InDOS is incremented whenever an INT 21 function begins
          and decremented whenever one completes
        during an INT 28 call, it is safe to call some INT 21 functions even
          though InDOS may be 01h instead of zero
        InDOS alone is not sufficient for determining when it is safe to
          enter DOS, as the critical error handling decrements InDOS and
          increments the critical error flag for the duration of the critical
          error.  Thus, it is possible for InDOS to be zero even if DOS is
          busy.
        SMARTDRV 4.0 sets the InDOS flag while flushing its buffers to disk,
          then zeros it on completion
        the critical error flag is the byte immediately following InDOS in
          DOS 2.x, and the byte BEFORE the InDOS flag in DOS 3.0+ and
          DR DOS 3.41+ (except COMPAQ DOS 3.0, where the critical error flag
          is located 1AAh bytes BEFORE the critical section flag)
        for DOS 3.1+, an undocumented call exists to get the address of the
          critical error flag (see AX=5D06h)
        this function was undocumented prior to the release of DOS 5.0.
SeeAlso: AX=5D06h,AX=5D0Bh,INT 15/AX=DE1Fh,INT 28
--------D-2135-------------------------------
INT 21 - DOS 2+ - GET INTERRUPT VECTOR
        AH = 35h
        AL = interrupt number
Return: ES:BX -> current interrupt handler
Note:   under DR DOS 5.0+, this function does not use any of the DOS-internal
          stacks and may thus be called at any time
SeeAlso: AH=25h,AX=2503h
--------E-213501-----------------------------
INT 21 P - FlashTek X-32VM - ALLOCATE PROTECTED-MODE SELECTOR
        AX = 3501h
Return: CF clear if successful
            BX = new selector
        CF set on error (no more selectors available)
Note:   the new selector will be an expand-up read/write data selector with
          undefined base and limit
SeeAlso: AX=3502h,INT 31/AX=0000h
--------E-213502-----------------------------
INT 21 P - FlashTek X-32VM - DEALLOCATE PROTECTED-MODE SELECTOR
        AX = 3502h
        BX = selector
Return: CF clear if successful
        CF set on error (invalid selector)
Note:   only selectors allocated via AX=3501h should be deallocated
SeeAlso: AX=3501h,INT 31/AX=0001h
--------E-213503-----------------------------
INT 21 P - FlashTek X-32VM - SET SELECTOR BASE ADDRESS
        AX = 3503h
        BX = selector
        ECX = base address
Return: CF clear if successful
        CF set on error (invalid selector)
SeeAlso: AX=3504h,AX=3505h,INT 31/AX=0007h
--------E-213504-----------------------------
INT 21 P - FlashTek X-32VM - GET SELECTOR BASE ADDRESS
        AX = 3504h
        BX = selector
Return: CF clear if successful
            ECX = absolute base address of selector
        CF set on error (invalid selector)
SeeAlso: AX=3503h,INT 31/AX=0006h
--------E-213505-----------------------------
INT 21 P - FlashTek X-32VM - SET SELECTOR LIMIT
        AX = 3505h
        BX = selector
        ECX = desired limit
Return: CF clear if successful
            ECX = actual limit set
        CF set on error (no more selectors available)
Note:   the limit will be rounded down to nearest 4K boundary if the requested
          limit is greater than 1MB
SeeAlso: AX=3503h,INT 31/AX=0008h
--------E-21350A-----------------------------
INT 21 P - FlashTek X-32VM - PHYSICAL ADDRESS MAPPING
        AX = 350Ah
        EBX = absolute physical address
        ECX = size in bytes of area to map
Return: CF clear if successful
        CF set on error (insufficient memory or service refused by DPMI host)
Notes:  should not make repeated calls for the same physical address
        there is no provision for unmapping memory
--------E-21350B-----------------------------
INT 21 P - FlashTek X-32VM - UPDATE AND RETURN AVAILABLE FREE MEMORY
        AX = 350Bh
        DS = default selector for DS
Return: CF clear
        EAX = maximum amount of memory which can be allocated via AX=350Ch
SeeAlso: AX=350Ch
--------E-21350C-----------------------------
INT 21 P - FlashTek X-32VM - ALLOCATE A BLOCK OF MEMORY
        AX = 350Ch
        ECX = size of block in bytes
        DS = default DS
Return: CF clear if successful
            EAX = near pointer to new block
            EDX = new lowest legal value for stack
        CF set on error (requested size not multiple of 4K)
SeeAlso: AX=350Bh,AX=350Dh
--------E-21350D-----------------------------
INT 21 P - FlashTek X-32VM - RESERVE BLOCK OF MEMORY FOR 32-BIT STACK
        AX = 350Dh
        EBX = current ESP value
        ECX = size of block in bytes
        DS = default DS
Return: CF clear if successful
            EBX = new value for ESP
            EDX = suggested new limit for SS
        CF set on error
Note:   this function should only be called once during initialization
SeeAlso: AX=350Bh,AX=350Ch
--------v-21357F-----------------------------
INT 21 - VIRUS - "Agiplan"/"Month 4-6" - INSTALLATION CHECK
        AX = 357Fh
Return: DX = FFFFh if installed
SeeAlso: AX=33E0h,AX=3DFFh
--------D-2136-------------------------------
INT 21 - DOS 2+ - GET FREE DISK SPACE
        AH = 36h
        DL = drive number (00h = default, 01h = A:, etc)
Return: AX = FFFFh if invalid drive
        else
            AX = sectors per cluster
            BX = number of free clusters
            CX = bytes per sector
            DX = total clusters on drive
Notes:  free space on drive in bytes is AX * BX * CX
        total space on drive in bytes is AX * CX * DX
        "lost clusters" are considered to be in use
        according to Dave Williams' MS-DOS reference, the value in DX is
          incorrect for non-default drives after ASSIGN is run
        this function does not return proper results on CD-ROMs;
          use AX=4402h"CD-ROM" instead
        (FAT32 drive) the reported total and free space are limited to 2G-32K
          should they exceed that value
SeeAlso: AH=1Bh,AH=1Ch,AX=4402h"CD-ROM",AX=7303h
--------D-213700-----------------------------
INT 21 - DOS 2+ - "SWITCHAR" - GET SWITCH CHARACTER
        AX = 3700h
Return: AL = status
            00h successful
                DL = current switch character
            FFh unsupported subfunction
Desc:   Determine the character which is used to introduce command switches.
          This setting is ignored by MS-DOS commands in version 4.0 and higher,
          but is honored by many third-party programs and by Novell DOS 7
          external commands
BUG:    Novell DOS 7's COMMAND.COM (prior to Update 15) fails to honor the
          SwitChar setting for internal commands even though COMMAND.COM
          honors it in its own command tail (i.e. COMMAND /?); even in Update
          15, internal commands fail to honor SwitChar for the /? help option
Notes:  documented in some OEM versions of some releases of DOS
        supported by OS/2 compatibility box
        always returns AL=00h/DL=2Fh for MS-DOS 5+ and DR DOS 3.41-6.0
        Novell DOS 7 COMMAND.COM indicates switch characters other than '/'
          by changing the first backslash (and only the first one) in the
          path it prints for PROMPT $p with a forward slash
SeeAlso: AX=3701h
--------D-213701-----------------------------
INT 21 - DOS 2+ - "SWITCHAR" - SET SWITCH CHARACTER
        AX = 3701h
        DL = new switch character
Return: AL = status
            00h successful
            FFh unsupported subfunction
Notes:  documented in some OEM versions of some releases of DOS; DOS 2.x had
          a SWITCHAR=c setting in CONFIG.SYS
        supported by OS/2 compatibility box and Novell DOS 7
        ignored by MS-DOS 5+ and DR DOS 3.41-6.0; DR DOS 6.0 and Novell DOS 7
          leave AX unchanged
SeeAlso: AX=3700h
--------D-2137-------------------------------
INT 21 - DOS 2.x and 3.3+ only - "AVAILDEV" - SPECIFY \DEV\ PREFIX USE
        AH = 37h
        AL = subfunction
            02h get availdev flag
                Return: DL = 00h \DEV\ must precede character device names
                           = nonzero \DEV\ is optional
            03h set availdev flag
                DL = new state
                    00h         \DEV\ is mandatory
                    nonzero     \DEV\ is optional
Return: AL = status
            00h successful
            FFh unsupported subfunction
Notes:  all versions of DOS from 2.00 allow \DEV\ to be prepended to device
          names without generating an error even if the directory \DEV does
          not actually exist (other paths generate an error if they do not
          exist); DOS 2.x has an AVAILDEV= option in CONFIG.SYS to make \DEV
          mandatory
        although MS-DOS 3.3+, DR DOS 3.41+, and Novell DOS 7 accept these
          calls, they have no effect, and AL=02h always returns DL=FFh (except
          for Novell DOS 7, which leaves AX unchanged for both subfunctions)
--------k-2137A0BX6A6D-----------------------
INT 21 - XPACK v1.52+ - TSR INSTALLATION CHECK
        AX = 37A0h
        BX = 6A6Dh ('jm')
Return: AL = FFh if not present as TSR (default return value from DOS)
        AX = 0000h if installed as a TSR
            CX = 6A6Dh ('jm')
            DX = version ID (0152h)
Program: XPACK is a transparent file compressor/decompressor by JauMing Tseng
SeeAlso: AX=37A1h/BX=6A6Dh,AX=37A3h/BX=6A6Dh
--------k-2137A1BX6A6D-----------------------
INT 21 - XPACK v1.52+ - UNINSTALL
        AX = 37A1h
        BX = 6A6Dh ('jm')
Return: AX = status
            0000h successful
            FFFFh failed
Program: XPACK is a transparent file compressor/decompressor by JauMing Tseng
SeeAlso: AX=37A0h/BX=6A6Dh
--------k-2137A2BX6A6D-----------------------
INT 21 - XPACK v1.52+ - GET TSR STATUS
        AX = 37A2h
        BX = 6A6Dh ('jm')
Return: AX = 0000h (successful)
        DL = status (01h active, 00h disabled)
SeeAlso: AX=37A3h/BX=6A6Dh
--------k-2137A3BX6A6D-----------------------
INT 21 - XPACK v1.52+ - SET TSR STATUS
        AX = 37A3h
        BX = 6A6Dh ('jm')
        DL = status (01h active, 00h disabled)
Return: AX = 0000h (successful)
SeeAlso: AX=37A0h/BX=6A6Dh,AX=37A2h/BX=6A6Dh
----------2137A6BX6A6D-----------------------
INT 21 - XPACK v1.65 - GET TEMPORARY DIRECTORY NAME
        AX = 37A6h
        BX = 6A6Dh ('jm')
Return: AX = 0000h
        DS:DX -> name of temporary directory
Program: XPACK is a transparent file compressor/decompressor by JauMing Tseng
SeeAlso: AX=37A0h/BX=6A6Dh,AX=37A7h/BX=6A6Dh
----------2137A7BX6A6D-----------------------
INT 21 - XPACK v1.65 - SET TEMPORARY DIRECTORY NAME
        AX = 37A7h
        BX = 6A6Dh ('jm')
        DS:DX -> ASCIZ name of temporary directory (max 64 chars)
Return: AX = 0000h
Note:   the specified directory name must include a drive letter and end with
          a backslash (e.g. 'c:\dos\',0)
SeeAlso: AX=37A0h/BX=6A6Dh,AX=37A6h/BX=6A6Dh
--------k-2137D0BX899D-----------------------
INT 21 - DIET v1.43e - TSR INSTALLATION CHECK
        AX = 37D0h
        BX = 899Dh ('DI' + 'ET')
Return: AL = FFh if not present as TSR (default return value from DOS)
        AX = 0000h if installed as a TSR
            CX = 899Dh
            DX = version ID
Program: DIET is a transparent file compressor/decompressor by Teddy Matsumoto
SeeAlso: AX=37D1h,AX=37D2h,AX=37D4h,AX=37D6h,AX=37DFh,AX=4BF0h,AX=4BF1h
--------k-2137D1BX899D-----------------------
INT 21 - DIET v1.43e - GET DIET.EXE RESIDENT SEGMENT
        AX = 37D1h
        BX = 899Dh ('DI' + 'ET')
Return: AX = 0000h
        CX = code segment of TSR part of DIET.EXE
        DX = memory block segment of TSR DIET.EXE
                (0000h if installed as device driver)
SeeAlso: AX=37D0h,AX=37DFh
--------k-2137D2BX899D-----------------------
INT 21 - DIET v1.43e - GET TSR CONTROL FLAGS
        AX = 37D2h
        BX = 899Dh ('DI' + 'ET')
Return: AX = 0000h
        DL = control flag (00h active, else disabled)
        DH = skip flag (nonzero while TSR active)
SeeAlso: AX=37D0h,AX=37D3h,AX=37D4h
--------k-2137D3BX899D-----------------------
INT 21 - DIET v1.43e - SET TSR CONTROL FLAGS
        AX = 37D3h
        BX = 899Dh ('DI' + 'ET')
        DL = control flag (00h active, else disabled)
        DH = skip flag (00h)
Return: AX = 0000h
SeeAlso: AX=37D0h,AX=37D2h,AX=37D5h
--------k-2137D4BX899D-----------------------
INT 21 - DIET v1.43e - GET TSR OPTIONS
        AX = 37D4h
        BX = 899Dh ('DI' + 'ET')
Return: AX = 0000h
        DX = TSR options (see #01396)
SeeAlso: AX=37D0h,AX=37D2h,AX=37D5h

Bitfields for DIET TSR options:
Bit(s)  Description     (Table 01396)
 0      automated compression of DIETed file
 1      automated compression of newly-created file
 2      suppress DIET message
 3      display original file size
 4-15   reserved (0)
--------k-2137D5BX899D-----------------------
INT 21 - DIET v1.43e - SET TSR OPTIONS
        AX = 37D5h
        BX = 899Dh ('DI' + 'ET')
        DX = TSR options (see #01396)
Return: AX = 0000h
Program: DIET is a transparent file compressor/decompressor by Teddy Matsumoto
SeeAlso: AX=37D0h,AX=37D3h,AX=37D4h
--------k-2137D6BX899D-----------------------
INT 21 - DIET v1.43e - GET TEMPORARY DIRECTORY NAMES
        AX = 37D6h
        BX = 899Dh ('DI' + 'ET')
Return: AX = 0000h
        DS:DX -> name of temporary directory or 0000h:0000h for current dir
SeeAlso: AX=37D0h,AX=37D7h
--------k-2137D7BX899D-----------------------
INT 21 - DIET v1.43e - SET TEMPORARY DIRECTORY NAMES
        AX = 37D7h
        BX = 899Dh ('DI' + 'ET')
        DS:DX -> ASCIZ name of temporary directory (max 61 chars)
                0000h:0000h for current directory
Return: AX = 0000h
Note:   the specified directory name must include a drive letter and end with
          a backslash
SeeAlso: AX=37D0h,AX=37D6h
--------k-2137DCBX899D-----------------------
INT 21 - DIET v1.43e - SET ADDRESS OF EXTERNAL PROCEDURE
        AX = 37DCh
        BX = 899Dh ('DI' + 'ET')
        DS:DX -> external procedure (see #01397)
Return: AX = 0000h
Note:   the resident code will call the specified external procedure at the
          beginning of decompression and when compression is exited on failure
SeeAlso: AX=37DDh

(Table 01397)
Values DIET external procedure is called with:
        STACK:  WORD    class
                        FFFDh creation failed for unknown reasons
                        FFFEh creation failed due to lack of space
                        FFFFh file creation error
                        else file handle of DIETed file to be decompressed
                DWORD   -> compressed filename
                DWORD   -> decompressed or temporary filename
Return: SI,DI,BP,DS,ES must be preserved by external procedure
--------k-2137DDBX899D-----------------------
INT 21 - DIET v1.43e - RELEASE EXTERNAL PROCEDURE
        AX = 37DDh
        BX = 899Dh ('DI' + 'ET')
Program: DIET is a transparent file compressor/decompressor by Teddy Matsumoto
Note:   unlinks the external procedure specified by AX=37DCh
SeeAlso: AX=37DCh
--------k-2137DEBX899D-----------------------
INT 21 - DIET v1.43e - READ EMS STATUS
        AX = 37DEh
        BX = 899Dh ('DI' + 'ET')
Return: AX = 0000h
        CX = EMS status
            0000h not used
            0001h used as work area
            0002h used for code and as work area
        DX = EMM handle when EMS is in use
--------k-2137DFBX899D-----------------------
INT 21 - DIET v1.43e - UNINSTALL TSR
        AX = 37DFh
        BX = 899Dh ('DI' + 'ET')
Return: AX = status
            0000h successful
            00FFh failed
Program: DIET is a transparent file compressor/decompressor by Teddy Matsumoto
SeeAlso: AX=37D0h
Index:  uninstall;DIET
--------D-2138-------------------------------
INT 21 - DOS 2+ - GET COUNTRY-SPECIFIC INFORMATION
        AH = 38h
--DOS 2.x--
        AL = 00h get current-country info
        DS:DX -> buffer for returned info (see #01398,#01399)
Return: CF set on error
            AX = error code (02h)
        CF clear if successful
            AX = country code (MS-DOS 2.11 only)
            buffer at DS:DX filled
--DOS 3.0+--
        AL = 00h for current country
        AL = 01h thru 0FEh for specific country with code <255 (see #01400)
        AL = 0FFh for specific country with code >= 255
           BX = 16-bit country code (see #01400)
        DS:DX -> buffer for returned info (see #01399)
Return: CF set on error
            AX = error code (02h)
        CF clear if successful
            AX = country code (Novell NWDOS v7.0)
            BX = country code
            DS:DX buffer filled
Note:   this function is not supported by the Borland DPMI host, but no error
          is returned; as a workaround, one should allocate a buffer in
          conventional memory with INT 31/AX=0100h and simulate an INT 21 with
          INT 31/AX=0300h
SeeAlso: AH=65h,INT 10/AX=5001h,INT 2F/AX=110Ch,INT 2F/AX=1404h

Format of DOS 2.00-2.10 country info:
Offset  Size    Description     (Table 01398)
 00h    WORD    date format  0 = USA    mm dd yy
                             1 = Europe dd mm yy
                             2 = Japan  yy mm dd
 02h    BYTE    currency symbol
 03h    BYTE    00h
 04h    BYTE    thousands separator char
 05h    BYTE    00h
 06h    BYTE    decimal separator char
 07h    BYTE    00h
 08h 24 BYTEs   reserved

Format of DOS 2.11+ country info:
Offset  Size    Description     (Table 01399)
 00h    WORD    date format (see #01398)
 02h  5 BYTEs   ASCIZ currency symbol string
 07h  2 BYTEs   ASCIZ thousands separator
 09h  2 BYTEs   ASCIZ decimal separator
 0Bh  2 BYTEs   ASCIZ date separator
 0Dh  2 BYTEs   ASCIZ time separator
 0Fh    BYTE    currency format
                bit 2 = set if currency symbol replaces decimal point
                bit 1 = number of spaces between value and currency symbol
                bit 0 = 0 if currency symbol precedes value
                        1 if currency symbol follows value
 10h    BYTE    number of digits after decimal in currency
 11h    BYTE    time format
                bit 0 = 0 if 12-hour clock
                        1 if 24-hour clock
 12h    DWORD   address of case map routine
                (FAR CALL, AL = character to map to upper case [>= 80h])
 16h  2 BYTEs   ASCIZ data-list separator
 18h 10 BYTEs   reserved

(Table 01400)
Values for country code:
 001h (1)       United States
 002h (2)       Canadian-French
 003h (3)       Latin America
 004h (4)       Canada (English)
 007h (7)       Russia
 014h (20)      Egypt
 01Bh (27)      South Africa
 01Eh (30)      Greece
 01Fh (31)      Netherlands
 020h (32)      Belgium
 021h (33)      France
 022h (34)      Spain
 023h (35)      Bulgaria???
 024h (36)      Hungary (not supported by DR DOS 5.0)
 026h (38)      Yugoslavia (not supported by DR DOS 5.0) -- obsolete
 027h (39)      Italy / San Marino / Vatican City
 028h (40)      Romania
 029h (41)      Switzerland / Liechtenstein
 02Ah (42)      Czechoslovakia / Tjekia / Slovakia (not supported by DR DOS 5.0)
 02Bh (43)      Austria (DR DOS 5.0)
 02Ch (44)      United Kingdom
 02Dh (45)      Denmark
 02Eh (46)      Sweden
 02Fh (47)      Norway
 030h (48)      Poland (not supported by DR DOS 5.0)
 031h (49)      Germany
 033h (51)      Peru
 034h (52)      Mexico
 035h (53)      Cuba
 036h (54)      Argentina
 037h (55)      Brazil (not supported by DR DOS 5.0)
 038h (56)      Chile
 039h (57)      Columbia
 03Ah (58)      Venezuela
 03Ch (60)      Malaysia
 03Dh (61)      International English / Australia
 03Eh (62)      Indonesia / East Timor
 03Fh (63)      Philippines
 040h (64)      New Zealand
 041h (65)      Singapore
 042h (66)      Taiwan???
 051h (81)      Japan (DR DOS 5.0, MS-DOS 5.0+)
 052h (82)      South Korea (DR DOS 5.0)
 054h (84)      Vietnam
 056h (86)      China (MS-DOS 5.0+)
 058h (88)      Taiwan (MS-DOS 5.0+)
 05Ah (90)      Turkey (MS-DOS 5.0+)
 05Bh (91)      India
 05Ch (92)      Pakistan
 05Dh (93)      Afghanistan
 05Eh (94)      Sri Lanka
 062h (98)      Iran
 063h (99)      Asia (English)
 070h (112)     Belarus
 0C8h (200)     Thailand
 0D4h (212)     Morocco
 0D5h (213)     Algeria
 0D8h (216)     Tunisia
 0DAh (218)     Libya
 0DCh (220)     Gambia
 0DDh (221)     Senegal
 0DEh (222)     Maruitania
 0DFh (223)     Mali
 0E0h (224)     African Guinea
 0E1h (225)     Ivory Coast
 0E2h (226)     Burkina Faso
 0E3h (227)     Niger
 0E4h (228)     Togo
 0E5h (229)     Benin
 0E6h (230)     Mauritius
 0E7h (231)     Liberia
 0E8h (232)     Sierra Leone
 0E9h (233)     Ghana
 0EAh (234)     Nigeria
 0EBh (235)     Chad
 0ECh (236)     Centra African Republic
 0EDh (237)     Cameroon
 0EEh (238)     Cape Verde Islands
 0EFh (239)     Sao Tome and Principe
 0F0h (240)     Equatorial Guinea
 0F1h (241)     Gabon
 0F2h (242)     Congo
 0F3h (243)     Zaire
 0F4h (244)     Angola
 0F5h (245)     Guinea-Bissau
 0F6h (246)     Diego Garcia
 0F7h (247)     Ascension Isle
 0F8h (248)     Seychelles
 0F9h (249)     Sudan
 0FAh (250)     Rwhanda
 0FBh (251)     Ethiopia
 0FCh (252)     Somalia
 0FDh (253)     Djibouti
 0FEh (254)     Kenya
 0FFh (255)     Tanzania
 100h (256)     Uganda
 101h (257)     Burundi
 103h (259)     Mozambique
 104h (260)     Zambia
 105h (261)     Madagascar
 106h (262)     Reunion Island
 107h (263)     Zimbabwe
 108h (264)     Namibia
 109h (265)     Malawi
 10Ah (266)     Lesotho
 10Bh (267)     Botswana
 10Ch (268)     Swaziland
 10Dh (269)     Comoros
 10Eh (270)     Mayotte
 122h (290)     St. Helena
 129h (297)     Aruba
 12Ah (298)     Faroe Islands
 12Bh (299)     Greenland
 15Eh (350)     Gibraltar
 15Fh (351)     Portugal
 160h (352)     Luxembourg
 161h (353)     Ireland
 162h (354)     Iceland
 163h (355)     Albania
 164h (356)     Malta
 165h (357)     Cyprus
 166h (358)     Finland
 167h (359)     Bulgaria
 172h (370)     Lithuania
 173h (371)     Latvia
 174h (372)     Estonia
 175h (373)     Moldova
 17Dh (381)     Serbia / Montenegro
 180h (384)     Croatia???
 181h (385)     Croatia
 182h (386)     Slovenia
 183h (387)     Bosnia-Herzegovina (Latin)
 184h (388)     Bosnia-Herzegovina (Cyrillic)
 185h (389)     FYR Macedonia
 1A5h (421)     Czech Republic
 1A6h (422)     Slovakia
 1F4h (500)     Falkland Islands
 1F5h (501)     Belize
 1F6h (502)     Guatemala
 1F7h (503)     El Salvador
 1F8h (504)     Honduras
 1F9h (505)     Nicraragua
 1FAh (506)     Costa Rica
 1FBh (507)     Panama
 1FCh (508)     St. Pierre and Miquelon
 1FDh (509)     Haiti
 24Eh (590)     Guadeloupe
 24Fh (591)     Bolivia
 250h (592)     Guyana
 251h (593)     Ecuador
 252h (594)     rench Guiana
 253h (595)     Paraguay
 254h (596)     Martinique / French Antilles
 255h (597)     Suriname
 256h (598)     Uruguay
 257h (599)     Netherland Antilles
 29Eh (670)     Saipan / N. Mariana Island
 29Fh (671)     Guam
 2A0h (672)     Norfolk Island (Australia) / Christmas Island/Cocos Islands / Antartica
 2A1h (673)     Brunei Darussalam
 2A2h (674)     Nauru
 2A3h (675)     Papua New Guinea
 2A4h (676)     Tonga Islands
 2A5h (677)     Solomon Islands
 2A6h (678)     Vanuatu
 2A7h (679)     Fiji
 2A8h (680)     Palau
 2A9h (681)     Wallis & Futuna
 2AAh (682)     Cook Islands
 2ABh (683)     Niue
 2ACh (684)     American Samoa
 2ADh (685)     Western Samoa
 2AEh (686)     Kiribati
 2AFh (687)     New Caledonia
 2B0h (688)     Tuvalu
 2B1h (689)     French Polynesia
 2B2h (690)     Tokealu
 2B3h (691)     Micronesia
 2B4h (692)     Marshall Islands
 2C7h (711)     ??? (currency = EA$)
 311h (785)     Arabic (Middle East/Saudi Arabia/etc.)
 324h (804)     Ukraine
 329h (809)     Antigua and Barbuda / Anguilla / Bahamas / Barbados / Bermuda
                British Virgin Islands / Cayman Islands / Dominica
                Dominican Republic / Grenada / Jamaica / Montserra
                St. Kitts and Nevis / St. Lucia / St. Vincent and Grenadines
                Trinidad and Tobago / Turks and Caicos
 352h (850)     North Korea
 354h (852)     Hong Kong
 355h (853)     Macao
 357h (855)     Cambodia
 358h (856)     Laos
 370h (880)     Bangladesh
 376h (886)     Taiwan (DOS 6.22+)
 3C0h (960)     Maldives
 3C1h (961)     Lebanon
 3C2h (962)     Jordan
 3C3h (963)     Syrian Arab Republic
 3C4h (964)     Ireq
 3C5h (965)     Kuwait
 3C6h (966)     Saudi Arabia
 3C7h (967)     Yemen
 3C8h (968)     Oman
 3CBh (971)     United Arab Emirates
 3CCh (972)     Israel (Hebrew) (DR DOS 5.0,MS-DOS 5.0+)
 3CDh (973)     Bahrain
 3CEh (974)     Qatar
 3CFh (975)     Bhutan
 3D0h (976)     Mongolia
 3D1h (977)     Nepal
 3E3h (995)     Myanmar (Burma)
Note:   not all country codes are supported by all versions of DOS
--------D-2138--DXFFFF-----------------------
INT 21 - DOS 3.0+ - SET COUNTRY CODE
        AH = 38h
        DX = FFFFh
        AL = 01h thru FEh for specific country with code <255
        AL = FFh for specific country with code >= 255
           BX = 16-bit country code (see #01400)
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
Note:   not supported by OS/2
SeeAlso: INT 2F/AX=1403h
--------D-2139-------------------------------
INT 21 - DOS 2+ - "MKDIR" - CREATE SUBDIRECTORY
        AH = 39h
        DS:DX -> ASCIZ pathname
Return: CF clear if successful
            AX destroyed
        CF set on error
            AX = error code (03h,05h) (see #01680 at AH=59h/BX=0000h)
Notes:  all directories in the given path except the last must exist
        fails if the parent directory is the root and is full
        DOS 2.x-3.3 allow the creation of a directory sufficiently deep that
          it is not possible to make that directory the current directory
          because the path would exceed 64 characters
        under the FlashTek X-32 DOS extender, the pointer is in DS:EDX
SeeAlso: AH=3Ah,AH=3Bh,AH=6Dh,AX=7139h,AH=E2h/SF=0Ah,AX=43FFh/BP=5053h
SeeAlso: INT 2F/AX=1103h,INT 60/DI=0511h
--------D-213A-------------------------------
INT 21 - DOS 2+ - "RMDIR" - REMOVE SUBDIRECTORY
        AH = 3Ah
        DS:DX -> ASCIZ pathname of directory to be removed
Return: CF clear if successful
            AX destroyed
        CF set on error
            AX = error code (03h,05h,06h,10h) (see #01680 at AH=59h/BX=0000h)
Notes:  directory must be empty (contain only '.' and '..' entries)
        under the FlashTek X-32 DOS extender, the pointer is in DS:EDX
SeeAlso: AH=39h,AH=3Bh,AX=713Ah,AH=E2h/SF=0Bh,INT 2F/AX=1101h,INT 60/DI=0512h
--------D-213B-------------------------------
INT 21 - DOS 2+ - "CHDIR" - SET CURRENT DIRECTORY
        AH = 3Bh
        DS:DX -> ASCIZ pathname to become current directory (max 64 bytes)
Return: CF clear if successful
            AX destroyed
        CF set on error
            AX = error code (03h) (see #01680 at AH=59h/BX=0000h)
Notes:  if new directory name includes a drive letter, the default drive is
          not changed, only the current directory on that drive
        changing the current directory also changes the directory in which
          FCB file calls operate
        under the FlashTek X-32 DOS extender, the pointer is in DS:EDX
SeeAlso: AH=47h,AX=713Bh,INT 2F/AX=1105h
--------D-213C-------------------------------
INT 21 - DOS 2+ - "CREAT" - CREATE OR TRUNCATE FILE
        AH = 3Ch
        CX = file attributes (see #01401)
        DS:DX -> ASCIZ filename
Return: CF clear if successful
            AX = file handle
        CF set on error
            AX = error code (03h,04h,05h) (see #01680 at AH=59h/BX=0000h)
Notes:  if a file with the given name exists, it is truncated to zero length
        under the FlashTek X-32 DOS extender, the pointer is in DS:EDX
        DR DOS checks the system password or explicitly supplied password at
          the end of the filename against the reserved field in the directory
          entry before allowing access
SeeAlso: AH=16h,AH=3Dh,AH=5Ah,AH=5Bh,AH=93h,INT 2F/AX=1117h

Bitfields for file attributes:
Bit(s)  Description     (Table 01401)
 0      read-only
 1      hidden
 2      system
 3      volume label (ignored)
 4      reserved, must be zero (directory)
 5      archive bit
 7      if set, file is shareable under Novell NetWare
--------D-213D-------------------------------
INT 21 - DOS 2+ - "OPEN" - OPEN EXISTING FILE
        AH = 3Dh
        AL = access and sharing modes (see #01402)
        DS:DX -> ASCIZ filename
        CL = attribute mask of files to look for (server call only)
Return: CF clear if successful
            AX = file handle
        CF set on error
            AX = error code (01h,02h,03h,04h,05h,0Ch,56h) (see #01680 at AH=59h)
Notes:  file pointer is set to start of file
        if SHARE or a network is loaded, the file open may fail if the file
          is already open, depending on the combination of sharing modes
          (see #01403,#01404)
        file handles which are inherited from a parent also inherit sharing
          and access restrictions
        files may be opened even if given the hidden or system attributes
        under the FlashTek X-32 DOS extender, the pointer is in DS:EDX
        DR DOS checks the system password or explicitly supplied password at
          the end of the filename (following a semicolon) against the reserved
          field in the directory entry before allowing access
        sharing modes are only effective on local drives if SHARE is loaded
BUG:    Novell DOS 7 SHARE v1.00 would refuse file access in the cases in
          #01403 marked with [1] (read-only open of a read-only file
          which had previously been opened in compatibility mode); this was
          fixed in SHARE v1.01 of 09/29/94
SeeAlso: AH=0Fh,AH=3Ch,AX=4301h,AX=5D00h,INT 2F/AX=1116h,INT 2F/AX=1226h

Bitfields for access and sharing modes:
Bit(s)  Description     (Table 01402)
 2-0    access mode
        000 read only
        001 write only
        010 read/write
        011 (DOS 5+ internal) passed to redirector on EXEC to allow
                case-sensitive filenames
 3      reserved (0)
 6-4    sharing mode (DOS 3.0+) (see #01403)
        000 compatibility mode
        001 "DENYALL" prohibit both read and write access by others
        010 "DENYWRITE" prohibit write access by others
        011 "DENYREAD" prohibit read access by others
        100 "DENYNONE" allow full access by others
        111 network FCB (only available during server call)
 7      inheritance
        if set, file is private to current process and will not be inherited
          by child processes
SeeAlso: #01782,#01403

(Table 01403)
Values of DOS 2-6.22 file sharing behavior:
          |     Second and subsequent Opens
 First    |Compat  Deny   Deny   Deny   Deny
 Open     |        All    Write  Read   None
          |R W RW R W RW R W RW R W RW R W RW
 - - - - -| - - - - - - - - - - - - - - - - -
 Compat R |Y Y Y  N N N  1 N N  N N N  1 N N
        W |Y Y Y  N N N  N N N  N N N  N N N
        RW|Y Y Y  N N N  N N N  N N N  N N N
 - - - - -|
 Deny   R |C C C  N N N  N N N  N N N  N N N
 All    W |C C C  N N N  N N N  N N N  N N N
        RW|C C C  N N N  N N N  N N N  N N N
 - - - - -|
 Deny   R |2 C C  N N N  Y N N  N N N  Y N N
 Write  W |C C C  N N N  N N N  Y N N  Y N N
        RW|C C C  N N N  N N N  N N N  Y N N
 - - - - -|
 Deny   R |C C C  N N N  N Y N  N N N  N Y N
 Read   W |C C C  N N N  N N N  N Y N  N Y N
        RW|C C C  N N N  N N N  N N N  N Y N
 - - - - -|
 Deny   R |2 C C  N N N  Y Y Y  N N N  Y Y Y
 None   W |C C C  N N N  N N N  Y Y Y  Y Y Y
        RW|C C C  N N N  N N N  N N N  Y Y Y
Legend: Y = open succeeds, N = open fails with error code 05h
        C = open fails, INT 24 generated
        1 = open succeeds if file read-only, else fails with error code
        2 = open succeeds if file read-only, else fails with INT 24
SeeAlso: #01636,#01404

(Table 01404)
Values for DOS 7.x file sharing behavior:
          |     Second and subsequent Opens
 First    |Compat    Deny      Deny      Deny      Deny
 Open     |          All       Write     Read      None
          |R W RW A  R W RW A  R W RW A  R W RW A  R W RW A
 - - - - -| - - - - - - - - - - - - - - - - - - - - - - - -
 Compat R |Y Y Y Y   N N N N   Y N N Y   N N N Y   Y N N Y
        W |Y Y Y C   N N N N   N N N N   N N N Y   Y N N Y
        RW|Y Y Y C   N N N N   N N N N   N N N Y   Y N N Y
        NA|Y C C Y   N N N N   Y N N Y   N N N Y   Y N N Y
 - - - - -|
 Deny   R |C C C C   N N N N   N N N N   N N N N   N N N N
 All    W |C C C C   N N N N   N N N N   N N N N   N N N N
        RW|C C C C   N N N N   N N N N   N N N N   N N N N
        NA|C C C C   N N N N   N N N N   N N N N   N N N N
 - - - - -|
 Deny   R |Y C C Y   N N N N   Y N N Y   N N N Y   Y N N Y
 Write  W |C C C C   N N N N   N N N N   Y N N Y   Y N N Y
        RW|C C C C   N N N N   N N N N   N N N Y   Y N N Y
        NA|Y C C Y   N N N N   Y N N Y   N N N Y   Y N N Y
 - - - - -|
 Deny   R |C C C C   N N N N   N Y N N   N N N N   N Y N N
 Read   W |C C C C   N N N N   N N N N   N Y N N   N Y N N
        RW|C C C C   N N N N   N N N N   N N N N   N Y N N
        NA|Y Y Y Y   N N N N   Y Y Y Y   N N N Y   Y Y Y Y
 - - - - -|
 Deny   R |Y Y Y Y   N N N N   Y Y Y Y   N N N Y   Y Y Y Y
 None   W |C C C C   N N N N   N N N N   Y Y Y Y   Y Y Y Y
        RW|C C C C   N N N N   N N N N   N N N Y   Y Y Y Y
        NA|Y Y Y Y   N N N N   Y Y Y Y   N N N Y   Y Y Y Y
Legend: R -> reading, W -> writing, RW -> both reading & writing,
        A/NA -> reading without access time update
        Y = open succeeds, N = open fails with error code 05h
        C = open fails, INT 24 generated
SeeAlso: #01403,#01636
--------v-213D76-----------------------------
INT 21 - VIRUS - "GT-SPOOF" -INSTALLATION CHECK
        AX = 3D76h
Return: AX = 763Dh if resident
SeeAlso: AX=357Fh,AX=3DFFh
--------v-213DFF-----------------------------
INT 21 - VIRUS - "JD-448" - INSTALLATION CHECK
        AX = 3DFFh
Return: AX = 4A44h if resident
SeeAlso: AX=3D76h,AX=4203h
--------D-213E-------------------------------
INT 21 - DOS 2+ - "CLOSE" - CLOSE FILE
        AH = 3Eh
        BX = file handle
Return: CF clear if successful
            AX destroyed
        CF set on error
            AX = error code (06h) (see #01680 at AH=59h/BX=0000h)
Notes:  if the file was written to, any pending disk writes are performed, the
          time and date stamps are set to the current time, and the directory
          entry is updated
        recent versions of DOS preserve AH because some versions of Multiplan
          had a bug which depended on AH being preserved
SeeAlso: AH=10h,AH=3Ch,AH=3Dh,INT 2F/AX=1106h,INT 2F/AX=1227h
--------D-213F-------------------------------
INT 21 - DOS 2+ - "READ" - READ FROM FILE OR DEVICE
        AH = 3Fh
        BX = file handle
        CX = number of bytes to read
        DS:DX -> buffer for data
Return: CF clear if successful
            AX = number of bytes actually read (0 if at EOF before call)
        CF set on error
            AX = error code (05h,06h) (see #01680 at AH=59h/BX=0000h)
Notes:  data is read beginning at current file position, and the file position
          is updated after a successful read
        the returned AX may be smaller than the request in CX if a partial
          read occurred
        if reading from CON, read stops at first CR
        under the FlashTek X-32 DOS extender, the pointer is in DS:EDX
BUG:    Novell NETX.EXE v3.26 and 3.31 do not set CF if the read fails due to
          a record lock (see AH=5Ch), though it does return AX=0005h; this
          has been documented by Novell
SeeAlso: AH=27h,AH=40h,AH=93h,INT 2F/AX=1108h,INT 2F/AX=1229h
--------G-213F-------------------------------
INT 21 - Turbo Debug HARDWARE BREAKPOINTS - READ STATUS BLOCK
        AH = 3Fh
        BX = handle for character device "TDHDEBUG"
        CX = number of bytes to read
        DS:DX -> buffer for status block (see #01406)
Return: CF clear if successful
            AX = number of bytes actually read
        CF set on error
            AX = error code (05h,06h) (see #01680 at AH=59h/BX=0000h)
SeeAlso: AH=40h"Turbo Debug"

(Table 01405)
Values for status of Turbo Debugger command:
 00h    successful
 01h    invalid handle
 02h    no more breakpoints available
 03h    hardware does not support specified breakpoint type
 04h    previous command prevents execution
 05h    debugger hardware not found
 06h    hardware failure
 07h    invalid command
 08h    driver not initialized yet
 FEh    recursive entry (hardware breakpoint inside hw bp handler)

Format of Turbo Debugger status block:
Offset  Size    Description     (Table 01406)
 00h    BYTE    status of command (see #01405)
---status for command 01h---
 01h    WORD    device driver interface version number (currently 1)
 03h    WORD    device driver software version
 05h    BYTE    maximum simultaneous hardware breakpoints
 06h    BYTE    configuration bits (see #01407)
 07h    BYTE    supported breakpoint types (see #01408)
 08h    WORD    supported addressing match modes (see #01409)
 0Ah    WORD    supported data matches (see #01410)
 0Ch    BYTE    maximum data match length (01h, 02h, or 04h)
 0Dh    WORD    size of onboard memory (in KB)
 0Fh    WORD    maximum number of trace-back events
 11h    WORD    hardware breakpoint enable byte address segment (0000h if not
                  supported)
---status for command 04h---
 01h    BYTE    handle to use when referring to the just-set breakpoint

Bitfields for Turbo Debugger configuration bits:
Bit(s)  Description     (Table 01407)
 0      CPU and DMA accesses are distinct
 1      can detect DMA transfers
 2      supports data mask
 3      hardware pass counter on breakpoints
 4      can match on data as well as addresses

Bitfields for Turbo Debugger supported breakpoint types:
Bit(s)  Description     (Table 01408)
 0      memory read
 1      memory write
 2      memory read/write
 3      I/O read
 4      I/O write
 5      I/O read/write
 6      instruction fetch

Bitfields for Turbo Debugger supported addressing match modes:
Bit(s)  Description     (Table 01409)
 0      any address
 1      equal to test value
 2      not equal
 3      above test value
 4      below test value
 5      below or equal
 6      above or equal
 7      within range
 8      outside range

Bitfields for Turbo Debugger supported data matches:
Bit(s)  Description     (Table 01410)
 0      any data
 1      equal to test value
 2      not equal
 3      above test value
 4      below test value
 5      below or equal
 6      above or equal
 7      within range
 8      outside range
--------N-213F-------------------------------
INT 21 - PC/TCP IPCUST.SYS - READ CONFIGURATION DATA
        AH = 3Fh
        BX = handle for character device "$IPCUST"
        CX = number of bytes to read
        DS:DX -> buffer for configuration data (see #01411)
Return: CF clear if successful
            AX = number of bytes actually read
        CF set on error
            AX = error code (05h,06h) (see #01680 at AH=59h/BX=0000h)
Notes:  if less than the entire data is read or written, the next read/write
          continues where the previous one ended; IOCTL calls AX=4402h and
          AX=4403h both reset the location at which the next operation starts
          to zero
        the data pointer is also reset to zero if the previous read or write
          reached or exceeded the end of the data, when the current function
          is read and the previous was write, or vice versa
        v2.1+ uses a new configuration method, but allows the installation
          of IPCUST.SYS for backward compatibility with other software which
          must read the PC/TCP configuration
SeeAlso: AH=40h"IPCUST",AX=4402h"IPCUST",AX=4402h"FTPSOFT"

Format of PC/TCP configuration data:
Offset  Size    Description     (Table 01411)
 00h 12 BYTEs   IPCUST.SYS device driver header (see #01646)
 12h    BYTE    ???
 13h    BYTE    ???
 14h    WORD    ???
 16h    BYTE    bit flags
                bit 0: send BS rather than DEL for BackSpace key
                bit 1: wrap long lines
 17h    BYTE    ???
 18h 64 BYTEs   ASCIZ hostname
 58h 64 BYTEs   ASCIZ domain name
                (fully qualified domain name is hostname.domain-name)
 98h 16 BYTEs   ASCIZ username
 A8h 64 BYTEs   ASCIZ full name
 E8h 64 BYTEs   ASCIZ office address
128h 32 BYTEs   ASCIZ phone number
148h    WORD    offset from GMT in minutes
14Ah  4 BYTEs   ASCIZ timezone name
14Eh    WORD    number of time servers
150h  ? DWORDs  (big-endian) IP addresses for time servers
        ???
164h    WORD    number of old-style name servers
166h  3 DWORDs  (big-endian) IP addresses for name servers
172h    WORD    number of domain name servers
174h  3 DWORDs  (big-endian) IP addresses for domain name servers
180h    DWORD   (big-endian) IP address of default gateway
184h    DWORD   (big-endian) IP address of log server
188h    DWORD   (big-endian) IP address of cookie server
18Ch    DWORD   (big-endian) IP address of lpr server
190h    DWORD   (big-endian) IP address of imagen print server
194h 54 BYTEs   ???
1E8h    WORD    TCP default window size in bytes
1EAh    WORD    TCP low window size
1ECh 64 BYTEs   ASCIZ host tabel filename
22Ch  2 BYTEs   ???
22Eh 80 BYTEs   ASCIZ mail relay host name
27Eh    BYTE    ???
27Fh    BYTE    ??? bit flags
280h 44 BYTEs   ???
2ACh    WORD    ???
2AEh 202 BYTEs  ???
--------N-213F-------------------------------
INT 21 - WORKGRP.SYS - GET ENTRY POINT
        AH = 3Fh
        BX = file handle for device "NET$HLP$"
        CX = 0008h
        DS:DX -> buffer for entry point record (see #01485)
Return: CF clear if successful
            AX = number of bytes actually read (0 if at EOF before call)
        CF set on error
            AX = error code (05h,06h) (see #01680 at AH=59h/BX=0000h)
Program: WORKGRP.SYS is the portion of Microsoft's Workgroup Connection which
          permits communication with PCs running Windows for Workgroups or
          LAN Manager
SeeAlso: AX=4402h"WORKGRP.SYS",INT 2F/AX=9400h
--------N-213F-------------------------------
INT 21 - BW-TCP - GET DRIVER INFO
        AH = 3Fh
        BX = file handle for device "ETHDEV27"
        CX = 002Bh
        DS:DX -> buffer for driver info (see #01412)
Return: CF clear if successful
            AX = number of bytes actually read (0 if at EOF before call)
        CF set on error
            AX = error code (05h,06h) (see #01680 at AH=59h/BX=0000h)
Program: BW-TCP is a TCP/IP protocol stack by Beame & Whiteside Software
InstallCheck:   for the TCP/IP stack, test for the existence of the character
          device UDP-IP10
Note:   the B&W socket library performs an INT 21/AX=4401h with DX=0060h before
          making this call to retrieve the driver information; one should also
          call the private API interrupt with AH=15h
SeeAlso: INT 14/AH=56h,INT 62/AH=00h"ETHDEV",INT 63/AH=03h,INT 64/AH=01h
Index:  installation check;BW-TCP hardware driver
Index:  installation check;BW-TCP TCPIP.SYS

Format of BW-TCP driver info:
Offset  Size    Description     (Table 01412)
 00h    WORD    I/O base address
 02h    BYTE    shared memory page (01h = segment 0100h, etc.)
 03h    BYTE    interrupt vector for private API
 04h    BYTE    IRQ used by board
 05h    WORD    size of data buffer
 07h    WORD    maximum transfer window
 09h    WORD    time zone
 0Bh    BYTE    address type (01h user, 04h RARP, 05h BOOTP)
 0Ch    DWORD   internet address
 10h    WORD    "value" ???
 12h    BYTE    subnet mask
 13h    WORD    "ether_pointer" ???
 15h    WORD    offset in device driver of log server records (see #01413)
 17h    WORD    offset in device driver of name server records (see #01413)
 19h    WORD    offset in device driver of print server records (see #01413)
 1Bh    WORD    offset in device driver of time server records (see #01413)
 1Dh    WORD    offset in device driver of gateway records (see #01413)
 1Fh    WORD    segment address of device driver
 21h    BYTE    transfer size
 22h  9 BYTEs   network adapter board name
---11/21/91+ ---
 23h    BYTE    ETHDEV version (major in high nybble, minor in low nybble)
 24h    BYTE    ETHDEV revision
 25h    BYTE    TCPIP version (major in high nybble, minor in low nybble)
 26h    BYTE    TCPIP revision
 27h    BYTE    BWRPC version (major in high nybble, minor in low nybble)
 28h    BYTE    BWRPC revision
 29h    BYTE    BWNFS version (major in high nybble, minor in low nybble)
 2Ah    BYTE    BWNFS revision
 2Bh    BYTE    Telnet version (major in high nybble, minor in low nybble)
 2Ch    BYTE    Telnet revision
 2Dh    BYTE    NETBIOS version (major in high nybble, minor in low nybble)
 2Eh    BYTE    NETBIOS revision
Note:   for each driver, if version=0, the driver is not installed or does
          not support the version check

Format of BW-TCP server records:
Offset  Size    Description     (Table 01413)
 00h    BYTE    number of server records following
 01h  N DWORDs  internet addresses of servers
--------y-213F-------------------------------
INT 21 - Trusted Access - NB.SYS - GET STATE
        AH = 3Fh
        BX = file handle for device "$$NB$$NB"
        CX = 0002h (size of state)
        DS:DX -> buffer for state record (see #01414)
Return: CF clear if successful
            AX = number of bytes actually read (0 if at EOF before call)
        CF set on error
            AX = error code (05h,06h) (see #01680 at AH=59h/BX=0000h)
Program: Trusted Access is a security and access-control package by Lassen
          Software, Inc.; NB.SYS is a device driver to prevent the user from
          terminating CONFIG.SYS or AUTOEXEC.BAT with Ctrl-Break
SeeAlso: AH=40h"NB.SYS",AX=4101h

Format of Trusted Access state record:
Offset  Size    Description     (Table 01414)
 00h    BYTE    00h off, 01h on
 01h    BYTE    keys being disabled
                bit 0: Ctrl-Break
                bit 1: SysReq
                bit 2: Ctrl and Alt
                bit 3: Ctrl-Alt-Del
                bit 7: all keys (overrides other bits)
----------213F-------------------------------
INT 21 U - IFSHLP.SYS - GET ENTRY POINT
        AH = 3Fh
        BX = file handle for device "IFS$HLP$"
        CX = 0008h (size of buffer in bytes)
        DS:DX -> buffer for entry point record (see #01415)
Return: CF clear if successful
            AX = number of bytes actually read (0 if at EOF before call)
        CF set on error
            AX = error code (05h,06h) (see #01680 at AH=59h/BX=0000h)
Program: IFSHLP.SYS is a support driver for Microsoft Windows for Workgroups
SeeAlso: AX=4402h"IFSHLP"

Format of IFSHLP.SYS entry point record:
Offset  Size    Description     (Table 01415)
 00h  4 BYTEs   (call) required signature if called via IOCTL
                        70h E9h 34h 37h for Windows 3.11
                        70h E9h 35h 37h for Windows 3.11
                (ret) signature 34h 37h 70h EFh (Windows 3.11)
                (ret) signature 35h 37h 70h EFh (Windows95)
 04h    DWORD   (ret) pointer to FAR call entry point (see #01416)

(Table 01416)
Call IFSHLP.SYS entry point with:
        STACK:  WORD    function number (00h-0Ch)
                        00h get ??? data
                        01h set interrupt intercepts (trap)
                        02h remove interrupt intercepts (untrap)
                        03h ??? LPT2
                        04h ??? LPT1
                        05h revector INT 2F to trap and remove trap for others
                        06h set ??? flag
                        07h clear ??? flag
                        08h get ??? flag word
                        ---Windows 3.11 only---
                        09h ???
                        0Ah ???
                        0Bh ???
                        0Ch get ???
---if function 00h---
Return: DX:AX -> ??? data (see #01417)
        BX destroyed
---if function 01h---
        STACK:  DWORD   new intercept (trap) address
Return: AX = status
            0000h successful
            0001h failed (already set)
                DX = 0000h
        BX destroyed
Note:   the trap handler is called with a function number in BX, and the
          original BX on top of the stack; a null handler must perform a
          POP BX and an IRET
---if function 02h---
Return: AX = status
            0000h successful
            0001h failed (not set)
        DX = 0000h
        BX destroyed
---if function 03h,04h---
        STACK:  WORD    ???
Return: AX = 0000h
        DX = 0000h
        BX destroyed
---if function 05h---
        ???
Return: BX destroyed
---if function 06h---
Return: AX = 0001h and DX = 0000h if already set
        AX,DX unchanged if successful
        BX destroyed
---if function 07h---
Return: AX = 0001h and DX = 0000h if not set
        AX,DX unchanged if successful
        BX destroyed
---if function 08h---
Return: DX = 0000h
        AX = flags
            bit 0: set/cleared by functions 06h and 07h
            bit 1: trap is currently set (refer to functions 01h/02h)
        BX destroyed
---if function 09h---
Return: AX = status
            0000h successful
            0001h failed (already called)
        BX destroyed
---if function 0Ah---
        STACK:  WORD    ???
        ???
Return: BX destroyed
---if function 0Bh---
Return: AX = status
            0000h successful
            0001h failed (not set)
        BX destroyed
---if function 0Ch---
Return: AX = 0000h
        ES:BX -> ??? data
---if function > 0Ch---
Return: AX = 0001h
        DX = 0000h
        BX destroyed

Format of IFSHLP ??? data:
Offset  Size    Description     (Table 01417)
 00h    DWORD   -> DOS Swappable Data Area (see #01687,#01689)
 02h    WORD    ??? offset in DOS data segment?
 04h    WORD    offset in DOS data segment of current-PSP WORD
 06h    WORD    ???
 08h    WORD    ???
 0Ah    WORD    ???
 0Ch    DWORD   -> DOS List of Lists (see #01627)
 10h    ???
SeeAlso: #01416
--------v-213F--BXFEB0-----------------------
INT 21 - VIRUS - "KYZ/LieWait" - INSTALLATION CHECK
        AH = 3Fh
        BX = FEB0h
Return: BX = 1212h if resident
SeeAlso: AX=3032h"VIRUS",AX=4BF1h"VIRUS"
--------D-2140-------------------------------
INT 21 - DOS 2+ - "WRITE" - WRITE TO FILE OR DEVICE
        AH = 40h
        BX = file handle
        CX = number of bytes to write
        DS:DX -> data to write
Return: CF clear if successful
            AX = number of bytes actually written
        CF set on error
            AX = error code (05h,06h) (see #01680 at AH=59h/BX=0000h)
Notes:  if CX is zero, no data is written, and the file is truncated or
          extended to the current position
        data is written beginning at the current file position, and the file
          position is updated after a successful write
        for FAT32 drives, the file must have been opened with AX=6C00h with
          the "extended size" flag in order to expand the file beyond 2GB;
          otherwise the write will fail with error code 0005h (access denied)
        the usual cause for AX < CX on return is a full disk
BUG:    a write of zero bytes will appear to succeed when it actually failed
          if the write is extending the file and there is not enough disk
          space for the expanded file (DOS 5.0-6.0); one should therefore check
          whether the file was in fact extended by seeking to 0 bytes from
          the end of the file (INT 21/AX=4202h/CX=0000h/DX=0000h)
        under the FlashTek X-32 DOS extender, the pointer is in DS:EDX
SeeAlso: AH=28h,AH=3Fh"DOS",AH=93h,INT 2F/AX=1109h
--------G-2140-------------------------------
INT 21 - Turbo Debug HARDWARE BREAKPOINTS - SEND CMD TO HARDWARE BRKPNT DRIVER
        AH = 40h
        BX = handle for character device "TDHDEBUG"
        CX = number of bytes to write
        DS:DX -> hardware breakpoint command (see #01418)
Return: CF clear if successful
            AX = number of bytes actually written
        CF set on error
            AX = error code (05h,06h) (see #01680 at AH=59h/BX=0000h)
Note:   results are retrieved by reading from the device
SeeAlso: AH=3Fh"Turbo Debug"

Format of Turbo Debugger hardware breakpoint commands:
Offset  Size    Description     (Table 01418)
 00h    BYTE    command code
                00h install interrupt vectors
                01h get hardware capabilities
                02h enable hardware breakpoints
                03h disable hardware breakpoints
                04h set hardware breakpoint
                05h clear hardware breakpoint
                06h set I/O base address and reset hardware
                07h restore interrupt vectors
---command code 00h---
 01h    DWORD   pointer to Turbo Debugger entry point to be jumped to on
                  hardware breakpoint; call with CPU state the same as on
                  the breakpoint except for pushing AX and placing an entry
                  code (FFh if breakout button or breakpoint handle) in AH
---command code 04h---
 01h    BYTE    breakpoint type
                00h memory read
                01h memory write
                02h memory read/write
                03h I/O read
                04h I/O write
                05h I/O read/write
                06h instruction fetch
 02h    BYTE    address matching mode (see #01419)
 03h    DWORD   32-bit linear low address
 07h    DWORD   32-bit linear high address
 0Bh    WORD    pass count
 0Dh    BYTE    data size (01h, 02h, or 04h)
 0Eh    BYTE    source of matched bus cycle (01h CPU, 02h DMA, 03h either)
 0Fh    BYTE    data-matching mode (see #01419)
 10h    DWORD   low data value
 14h    DWORD   high data value
 18h    DWORD   data mask specifying which bits of the data are tested
---command code 05h---
 01h    BYTE    handle of breakpoint to clear (breakpoint returned from command
                  04h)
---command code 06h---
 01h    WORD    base address of hardware debugger board

(Table 01419)
Values for Turbo Debugger address/data matching mode:
 00h    match any
 01h    equal to test value
 02h    different from test value
 03h    above test value
 04h    below test value
 05h    below or equal to test value
 06h    above or equal to test value
 07h    within inclusive range
 08h    outside specified range
--------N-2140-------------------------------
INT 21 - PC/TCP IPCUST.SYS - WRITE CONFIGURATION DATA
        AH = 40h
        BX = handle for character device "$IPCUST"
        CX = number of bytes to write
        DS:DX -> buffer for configuration data (AH=3Fh"IPCUST")
Return: CF clear if successful
            AX = number of bytes actually written
        CF set on error
            AX = error code (05h,06h) (see #01680 at AH=59h/BX=0000h)
Notes:  if less than the entire data is read or written, the next read/write
          continues where the previous one ended; IOCTL calls AX=4402h and
          AX=4403h both reset the location at which the next operation starts
          to zero
        the data pointer is also reset to zero if the previous read or write
          reached or exceeded the end of the data, when the current function
          is read and the previous was write, or vice versa
        v2.1+ uses a new configuration method, but allows the installation
          of IPCUST.SYS for backward compatibility with other software which
          must read the PC/TCP configuration
SeeAlso: AH=3Fh"IPCUST",AX=4402h"IPCUST"
--------y-2140-------------------------------
INT 21 U - Trusted Access - NB.SYS - SET STATE
        AH = 40h
        BX = handle for character device "$$NB$$NB"
        DS:DX -> state record (see #01414)
        CX ignored
Return: CF clear if successful
            AX = number of bytes actually written
        CF set on error
            AX = error code (05h,06h) (see #01680 at AH=59h/BX=0000h)
Program: Trusted Access is a security and access-control package by Lassen
          Software, Inc.; NB.SYS is a device driver to prevent the user from
          terminating CONFIG.SYS or AUTOEXEC.BAT with Ctrl-Break
SeeAlso: AH=3Fh"NB.SYS"
--------j-214000BX0002-----------------------
INT 21 - FARTBELL.EXE - INSTALLATION CHECK
        AX = 4000h
        BX = 0002h
        CX = 0000h
        DS:DX = 0000h:0000h
Return: CF clear if installed
            AX = CS of resident code
Program: FARTBELL is a joke program by Guenther Thiele which makes various
          noises when programs output a bell
SeeAlso: AX=4001h
--------j-214001BX0002-----------------------
INT 21 - FARTBELL.EXE - FORCE NOISE
        AX = 4001h
        BX = 0002h
        CX = 0000h
        DS:DX = 0000h:0000h
Program: FARTBELL is a joke program by Guenther Thiele which makes various
          noises when programs output a bell
SeeAlso: AX=4000h
--------D-2141-------------------------------
INT 21 - DOS 2+ - "UNLINK" - DELETE FILE
        AH = 41h
        DS:DX -> ASCIZ filename (no wildcards, but see notes)
        CL = attribute mask for deletion (server call only, see notes)
Return: CF clear if successful
            AX destroyed (DOS 3.3) AL seems to be drive of deleted file
        CF set on error
            AX = error code (02h,03h,05h) (see #01680 at AH=59h/BX=0000h)
Notes:  (DOS 3.1+) wildcards are allowed if invoked via AX=5D00h, in which case
          the filespec must be canonical (as returned by AH=60h), and only
          files matching the attribute mask in CL are deleted
        DR DOS 5.0-6.0 returns error code 03h if invoked via AX=5D00h; DR DOS
          3.41 crashes if called via AX=5D00h with wildcards
        DOS does not erase the file's data; it merely becomes inaccessible
          because the FAT chain for the file is cleared
        deleting a file which is currently open may lead to filesystem
          corruption.  Unless SHARE is loaded, DOS does not close the handles
          referencing the deleted file, thus allowing writes to a nonexistant
          file.
        under DR DOS and DR Multiuser DOS, this function will fail if the file
          is currently open
        under the FlashTek X-32 DOS extender, the pointer is in DS:EDX
BUG:    DR DOS 3.41 crashes if called via AX=5D00h
SeeAlso: AH=13h,AX=4301h,AX=4380h,AX=5D00h,AH=60h,AX=7141h,AX=F244h
SeeAlso: INT 2F/AX=1113h
--------y-214101DXFFFE-----------------------
INT 21 - SoftLogic Data Guardian - ???
        AX = 4101h
        DX = FFFEh
Return: AX = 0000h if installed
Note:   resident code sets several internal variables on this call
SeeAlso: AH=3Fh"NB.SYS",INT 16/AX=FFA3h/BX=0000h
--------D-2142-------------------------------
INT 21 - DOS 2+ - "LSEEK" - SET CURRENT FILE POSITION
        AH = 42h
        AL = origin of move
            00h start of file
            01h current file position
            02h end of file
        BX = file handle
        CX:DX = (signed) offset from origin of new file position
Return: CF clear if successful
            DX:AX = new file position in bytes from start of file
        CF set on error
            AX = error code (01h,06h) (see #01680 at AH=59h/BX=0000h)
Notes:  for origins 01h and 02h, the pointer may be positioned before the
          start of the file; no error is returned in that case (except under
          Windows NT), but subsequent attempts at I/O will produce errors
        if the new position is beyond the current end of file, the file will
          be extended by the next write (see AH=40h); for FAT32 drives, the
          file must have been opened with AX=6C00h with the "extended size"
          flag in order to expand the file beyond 2GB
BUG:    using this method to grow a file from zero bytes to a very large size
          can corrupt the FAT in some versions of DOS; the file should first
          be grown from zero to one byte and then to the desired large size
SeeAlso: AH=24h,INT 2F/AX=1228h
--------v-214203-----------------------------
INT 21 - VIRUS - "Shake" - INSTALLATION CHECK
        AX = 4203h
Return: AX = 1234h if resident
SeeAlso: AX=3DFFh,AX=4243h
--------v-214243-----------------------------
INT 21 - VIRUS - "Invader" - INSTALLATION CHECK
        AX = 4243h
Return: AX = 5678h if resident
SeeAlso: AX=4203h,AX=44A0h,AX=4B04h
--------D-214300-----------------------------
INT 21 - DOS 2+ - GET FILE ATTRIBUTES
        AX = 4300h
        DS:DX -> ASCIZ filename
Return: CF clear if successful
            CX = file attributes (see #01420)
            AX = CX (DR DOS 5.0)
        CF set on error
            AX = error code (01h,02h,03h,05h) (see #01680 at AH=59h)
Notes:  under the FlashTek X-32 DOS extender, the filename pointer is in DS:EDX
        under DR DOS 3.41 and 5.0, attempts to change the subdirectory bit are
          simply ignored without an error
BUG:    Windows for Workgroups returns error code 05h (access denied) instead
          of error code 02h (file not found) when attempting to get the
          attributes of a nonexistent file.  This causes open() with O_CREAT
          and fopen() with the "w" mode to fail in Borland C++.
SeeAlso: AX=4301h,AX=4310h,AX=7143h,AH=B6h,INT 2F/AX=110Fh,INT 60/DI=0517h
--------D-214301-----------------------------
INT 21 - DOS 2+ - "CHMOD" - SET FILE ATTRIBUTES
        AX = 4301h
        CX = new file attributes (see #01420)
        DS:DX -> ASCIZ filename
Return: CF clear if successful
            AX destroyed
        CF set on error
            AX = error code (01h,02h,03h,05h) (see #01680 at AH=59h)
Notes:  will not change volume label or directory attribute bits, but will
          change the other attribute bits of a directory (the directory
          bit must be cleared to successfully change the other attributes of a
          directory, but the directory will not be changed to a normal file as
          a result)
        MS-DOS 4.01 reportedly closes the file if it is currently open
        for security reasons, the Novell NetWare execute-only bit can never
          be cleared; the file must be deleted and recreated
        under the FlashTek X-32 DOS extender, the filename pointer is in DS:EDX
        DOS 5.0 SHARE will close the file if it is currently open in sharing-
          compatibility mode, otherwise a sharing violation critical error is
          generated if the file is currently open
        DR DOS 3.41/5.0 will silently ignore attempts to change the 'directory'
          attribute bit
SeeAlso: AX=4300h,AX=4311h,AX=7143h,INT 2F/AX=110Eh

Bitfields for file attributes:
Bit(s)  Description     (Table 01420)
 7      shareable (Novell NetWare)
 7      pending deleted files (Novell DOS, OpenDOS)
 6      unused
 5      archive
 4      directory
 3      volume label
        execute-only (Novell NetWare)
 2      system
 1      hidden
 0      read-only
--------D-214302-----------------------------
INT 21 - MS-DOS 7 - GET COMPRESSED FILE SIZE
        AX = 4302h
        DS:DX -> ASCIZ pathname for file or directory
Return: CF clear if successful
            ??? = compressed size of file/directory in bytes
        CF set on error
            AX = error code
Note:   on volumes which do not support compression, the returned size is the
          actual file size rounded up to the next cluster boundary
SeeAlso: AH=71h,AH=72h
--------O-214302-----------------------------
INT 21 - DR DOS 3.41+ internal - GET ACCESS RIGHTS
        AX = 4302h
        DS:DX -> ASCIZ pathname
Return: CF clear if successful
            CX = access rights (see #01421)
            AX = CX (DR DOS 5.0)
        CF set on error
            AX = error code
Desc:   Determine which operations the calling program may perform on a
          specified file without being required to provide a password.
Notes:  this protection scheme has been coordinated on all current Digital
          Research/Novell operating systems (DR DOS 3.41+, DRMDOS 5.x, and
          FlexOS 2+)
        this function is documented in DR DOS 6.0 and corresponds to the
          "Get/Set File Attributes" function, subfunction 2, documented in
          Concurrent DOS.
        only FlexOS actually uses the "execution" bits; DR DOS 3.41+ treats
          them as "read" bits.
        DR DOS 3.41-5.x only use bits 0-3.  Only DR DOS 6.0 using a
          DRMDOS 5.x security system allowing for users and groups uses bits
          4-11.
SeeAlso: AX=4303h,#01354 at INT 21/AH=11h

Bitfields for DR DOS file access rights:
Bit(s)  Description     (Table 01421)
 0      owner delete requires password
 1      owner execution requires password (FlexOS)
 2      owner write requires password
 3      owner read requires password
 4      group delete requires password
 5      group execution requires password (FlexOS)
 6      group write requires password
 7      group read requires password
 8      world delete requires password
 9      world execution requires password (FlexOS)
 10     world write requires password
 11     world read requires password
--------O-214303-----------------------------
INT 21 - DR DOS 3.41+ internal - SET ACCESS RIGHTS AND PASSWORD
        AX = 4303h
        CX = access rights
             bits 11-0: access rights (see #01421)
             bit 15: new password is to be set
        DS:DX -> ASCIZ pathname
        [DTA] = new password if CX bit 15 is set (blank-padded to 8 characters)
Return: CF clear if successful
        CF set on error
            AX = error code
Notes:  if the file is already protected, the old password must be added after
          the pathname, separated by a ";".  As with all password handling in
          DR DOS, the old password is processed by the kernel, not any
          applications or utilities making the call.
        this function is documented in DR DOS 6.0 and corresponds to the
          "Get/Set File Attributes" function, subfunction 3, documented in
          Concurrent DOS.
SeeAlso: AH=0Fh,AH=17h,AX=4302h"DR DOS",AX=4305h,AX=4454h
--------O-214304-----------------------------
INT 21 U - DR DOS 5.0-6.0 internal - GET ENCRYPTED PASSWORD
        AX = 4304h
        DS:DX -> ASCIZ filename
        ???
Return: CF clear if successful
            CX = AX = 0000h if no password assigned to file
        CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
Note:   this function is only supported by DR DOS 5.0 and 6.0 and DRMDOS 5.1
SeeAlso: AX=4303h,AX=4305h
--------O-214305-----------------------------
INT 21 U - DR DOS 5.0-6.0 internal - SET EXTENDED FILE ATTRIBUTES
        AX = 4305h
        DS:DX -> ASCIZ filename
        ???
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
Desc:   this function allows the extended attributes, and optionally the
          encrypted password, of a file to be set.
Note:   this function is only supported by DR DOS 5.0 and 6.0 and DRMDOS 5.1
SeeAlso: AX=4304h,AX=4311h
--------O-214306-----------------------------
INT 21 O - DR DOS 6.0 - GET FILE OWNER
        AX = 4306h
        DS:DX -> ASCIZ filename
Return: CF clear if successful
            AX = CX = value set with AX=4307h
        CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
Note:   no longer supported by Novell DOS 7 / OpenDOS
SeeAlso: AX=4307h
--------O-214307-----------------------------
INT 21 O - DR DOS 6.0 - SET FILE OWNER
        AX = 4307h
        CX = ??? (owner identification number?)
        DS:DX -> ASCIZ filename
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
Note:   no longer supported by Novell DOS 7 / OpenDOS
SeeAlso: AX=4306h
--------N-214310-----------------------------
INT 21 - Banyan VINES 2.1+ - GET EXTENDED FILE ATTRIBUTES
        AX = 4310h
        DS:DX -> ASCIZ filename
Return: CF clear if successful
            CH = attributes (see #01422)
        CF set on error
            AX = error code (01h,02h,03h,05h) (see #01680 at AH=59h/BX=0000h)
Note:   the filename may be a directory but must be on a VINES file service
SeeAlso: AX=4300h,AX=4311h,AH=B6h,INT 2F/AX=110Fh
--------N-214311-----------------------------
INT 21 - Banyan VINES 2.1+ - SET EXTENDED FILE ATTRIBUTES
        AX = 4311h
        CH = new attributes (see #01422)
        DS:DX -> ASCIZ filename
Return: CF clear if successful
        CF set on error
            AX = error code (01h,02h,03h,05h) (see #01680 at AH=59h/BX=0000h)
Note:   the filename may be a directory but must be on a VINES file service
SeeAlso: AX=4301h,AX=4305h,AX=4310h,INT 2F/AX=110Eh

Bitfields for VINES extended file attributes:
Bit(s)  Description     (Table 01422)
 7      unused
 6      shareable
 5      execute-only
 4-0    unused
--------u-214321BX0000-----------------------
INT 21 - Q87, Q387 - INSTALLATION CHECK
        AX = 4321h
        BX = 0000h
        EAX = 87654321h (entire EAX value is required, not just AX)
Return: EAX = 12345678h if installed
Program: Q387 (renamed to Q87 as of v3.7) is a math coprocessor emulator from
          Quickware
Note:   this function is available only in virtual-86 mode in older versions;
          newer versions also provide it in MS Windows 16- and 32-bit protected
          mode
SeeAlso: AX=4321h/BX=0001h,AX=4321h/BX=0002h,INT 67/AX=4321h
--------u-214321BX0001-----------------------
INT 21 - Q87, Q387 - ENABLE EMULATOR
        AX = 4321h
        BX = 0001h
        EAX = 87654321h (entire EAX value is required, not just AX)
Desc:   enable the emulator by setting the CPU MSW's EM bit and updating
          the BIOS equipment list
Note:   this function is available only in virtual-86 mode in older versions;
          newer versions also provide it in MS Windows 16- and 32-bit protected
          mode
SeeAlso: AX=4321h/BX=0000h,AX=4321h/BX=0002h
--------u-214321BX0002-----------------------
INT 21 - Q87, Q387 - DISABLE EMULATOR
        AX = 4321h
        BX = 0002h
        EAX = 87654321h (entire EAX value is required, not just AX)
Desc:   disable the emulator by clearing the CPU MSW's EM bit and updating
          the BIOS equipment list
Note:   this function is available only in virtual-86 mode in older versions;
          newer versions also provide it in MS Windows 16- and 32-bit protected
          mode
SeeAlso: AX=4321h/BX=0000h,AX=4321h/BX=0001h
--------O-214380-----------------------------
INT 21 - Novell DOS 7 - UNDELETE PENDING DELETE FILE
        AX = 4380h
        ???
Return: ???
SeeAlso: AH=41h,AX=4381h
--------O-214381-----------------------------
INT 21 - Novell DOS 7 - PURGE PENDING DELETE FILE
        AX = 4381h
        ???
Return: ???
SeeAlso: AH=41h,AX=4380h
--------D-2143FFBP5053-----------------------
INT 21 - MS-DOS 7.20 (Win98) - EXTENDED-LENGTH FILENAME OPERATIONS
        AX = 43FFh
        BP = 5053h ('PS')
        CL = function
            39h "mkdir" create directory
                DS:DX -> ASCIZ pathname
            56h rename file
                DS:DX -> ASCIZ filename of existing file (no wildcards)
                ES:DI -> ASCIZ new filename (no wildcards)
Return: CF clear if successful
            AX destroyed
        CF set on error
            AX = error code (03h,05h) (see #01680 at AH=59h/BX=0000h)
Note:   these functions are equivalent to INT 21/AH=39h and INT 21/AH=56h,
          but with a maximum path length of 128 characters instead of 67;
          unlike INT 21/AX=71xxh, these functions are available under bare
          DOS and not just in a Windows DOS box
SeeAlso: AH=39h,AH=56h,AX=7139h,AX=7156h
--------!---Section--------------------------
Interrupt List, part 7 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------D-214400-----------------------------
INT 21 - DOS 2+ - IOCTL - GET DEVICE INFORMATION
        AX = 4400h
        BX = handle
Return: CF clear if successful
            DX = device information word (see #01423)
            AX destroyed
        CF set on error
            AX = error code (01h,05h,06h) (see #01680 at AH=59h/BX=0000h)
Notes:  value in DH corresponds to high byte of device driver's attribute word
          if handle refers to a character device
        Novell NetWare reportedly does not return a drive number in bits 5-0
          for a disk file
        this function was not supported by Digital Research's DOS-Plus
SeeAlso: AX=4401h,INT 2F/AX=122Bh

Bitfields for device information word:
Bit(s)  Description     (Table 01423)
 character device
  14    device driver can process IOCTL requests (see AX=4402h"DOS 2+")
  13    output until busy supported
  11    driver supports OPEN/CLOSE calls
   8    ??? (set by MS-DOS 6.2x KEYB)
   7    set (indicates device)
   6    EOF on input
   5    raw (binary) mode
   4    device is special (uses INT 29)
   3    clock device
   2    NUL device
   1    standard output
   0    standard input
 disk file
  15    file is remote (DOS 3.0+)
  14    don't set file date/time on closing (DOS 3.0+)
  11    media not removable
   8    (DOS 4 only) generate INT 24 if no disk space on write or read past
          end of file
   7    clear (indicates file)
   6    file has not been written
  5-0   drive number (0 = A:)
SeeAlso: INT 29
--------D-214401-----------------------------
INT 21 - DOS 2+ - IOCTL - SET DEVICE INFORMATION
        AX = 4401h
        BX = handle (must refer to character device)
        DX = device information word (see #01423)
            (DH must be zero for DOS version prior to 6.x)
Return: CF clear if successful
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Note:   this function was not supported by Digital Research's DOS-Plus
SeeAlso: AX=4400h,INT 2F/AX=122Bh
--------D-214402-----------------------------
INT 21 - DOS 2+ - IOCTL - READ FROM CHARACTER DEVICE CONTROL CHANNEL
        AX = 4402h
        BX = file handle referencing character device
        CX = number of bytes to read
        DS:DX -> buffer
Return: CF clear if successful
            AX = number of bytes actually read
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Notes:  format of data is driver-specific
          (also see separate entries below for some specific cases)
        this function was not supported by Digital Research's DOS-Plus
SeeAlso: AX=4400h,AX=4403h"DOS",AX=4404h"DOS",INT 2F/AX=122Bh
--------N-214402-----------------------------
INT 21 - Network Driver Interface Specification (NDIS) 2.0.1 - PROTOCOL MANAGER
        AX = 4402h
        BX = file handle for device "PROTMAN$"
        CX = 000Eh (size of request block)
        DS:DX -> request block (see #01424,#01425,#01426,#01427,#01428,#01432,#01433)
Return: CF clear if successful
            AX = number of bytes actually read
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
SeeAlso: AX=4402h"FTPSOFT"

Format of NDIS request block for GetProtocolManagerInfo:
Offset  Size    Description     (Table 01424)
 00h    WORD    01h
 02h    WORD    returned status (see #01434)
 04h    DWORD   returned pointer to structure representing parsed user config
 08h    DWORD   unused
 0Ch    WORD    returned BCD version of NDIS on which Protocol Manager is based
SeeAlso: #01425,#01426,#01427,#01428,#01429,#01430,#01431,#01432,#01433

Format of NDIS request block for RegisterModule:
Offset  Size    Description     (Table 01425)
 00h    WORD    02h
 02h    WORD    returned status (see #01434)
 04h    DWORD   pointer to module's common characteristics table (see #01435)
 08h    DWORD   pointer to list of modules to which the module is to be bound
 0Ch    WORD    unused
SeeAlso: #01424,#01426,#01427,#01428,#01429,#01430,#01431,#01432,#01433

Format of NDIS request block for BindAndStart:
Offset  Size    Description     (Table 01426)
 00h    WORD    03h
 02h    WORD    returned status (see #01434)
 04h    DWORD   caller's virtual address in FailingModules structure
 08h    DWORD   unused
 0Ch    WORD    unused
SeeAlso: #01424,#01425,#01427,#01428,#01429,#01430,#01431,#01432,#01433

Format of NDIS request block for GetProtocolManagerLinkage:
Offset  Size    Description     (Table 01427)
 00h    WORD    04h
 02h    WORD    returned status (see #01434)
 04h    DWORD   returned dispatch point
 08h    DWORD   unused
 0Ch    WORD    returned protocol manager DS
Note:   the dispatch point may be called as follows instead of using this IOCTL
        STACK: WORD  protocol manager DS
               DWORD pointer to request block
        Return: AX = returned status
                STACK popped
SeeAlso: #01424,#01425,#01426,#01428,#01429,#01430,#01431,#01432,#01433

Format of NDIS request block for GetProtocolIniPath:
Offset  Size    Description     (Table 01428)
 00h    WORD    05h
 02h    WORD    returned status (see #01434)
 04h    DWORD   pointer to a buffer for the ASCIZ pathname of PROTOCOL.INI
 08h    DWORD   unused
 0Ch    WORD    buffer length
SeeAlso: #01424,#01425,#01426,#01427,#01429,#01430,#01431,#01432,#01433

Format of NDIS request block for RegisterProtocolManagerInfo:
Offset  Size    Description     (Table 01429)
 00h    WORD    06h
 02h    WORD    returned status (see #01434)
 04h    DWORD   pointer to structure containing parsed user config file
 08h    DWORD   unused
 0Ch    WORD    length of structure
SeeAlso: #01424,#01425,#01426,#01427,#01428,#01430,#01431,#01432,#01433

Format of NDIS request block for InitAndRegister:
Offset  Size    Description     (Table 01430)
 00h    WORD    07h
 02h    WORD    returned status (see #01434)
 04h    DWORD   unused
 08h    DWORD   poitner to ASCIZ name of the module to be prebind initialized
 0Ch    WORD    unused
SeeAlso: #01424,#01425,#01426,#01427,#01428,#01429,#01431,#01432,#01433

Format of NDIS request block for UnbindAndStop:
Offset  Size    Description     (Table 01431)
 00h    WORD    08h
 02h    WORD    returned status (see #01434)
 04h    DWORD   failing modules as for BindAndStart
 08h    DWORD   if not 0000h:0000h, pointer to ASCIZ name of module to unbind
                if 0000h:0000h, terminate a set of previously dynamically
                  bound protocol modules
 0Ch    WORD    unused
SeeAlso: #01424,#01425,#01426,#01427,#01428,#01429,#01430,#01432,#01433

Format of NDIS request block for BindStatus:
Offset  Size    Description     (Table 01432)
 00h    WORD    09h
 02h    WORD    returned status (see #01434)
 04h    DWORD   must be 0000h:0000h
                on return, points to root tree
 08h    DWORD   0000h:0000h
 0Ch    WORD    unused under DOS
SeeAlso: #01424,#01425,#01426,#01427,#01428,#01429,#01430,#01431,#01433

Format of NDIS request block for RegisterStatus:
Offset  Size    Description     (Table 01433)
 00h    WORD    0Ah
 02h    WORD    returned status (0000h, 0008h, 002Ch) (see #01434)
 04h    DWORD   0000h:0000h
 08h    DWORD   pointer to 16-byte ASCIZ module name
 0Ch    WORD    0000h
Note:   not supported by the 10NET v5.0 PROTMAN$ driver
SeeAlso: #01424,#01425,#01426,#01427,#01428,#01429,#01430,#01431,#01432

(Table 01434)
Values for NDIS status code:
 0000h  success
 0001h  wait for release--protocol has retained control of the data buffer
 0002h  request queued
 0003h  frame not recognized
 0004h  frame rejected
 0005h  frame should be forwarded
 0006h  out of resource
 0007h  invalid parameter
 0008h  invalid function
 0009h  not supported
 000Ah  hardware error
 000Bh  transmit error
 000Ch  unrecognized destination
 000Dh  buffer too small
 0020h  already started
 0021h  binding incomplete
 0022h  driver not initialized
 0023h  hardware not found
 0024h  hardware failure
 0025h  configuration failure
 0026h  interrupt conflict
 0027h  MAC incompatible
 0028h  initialization failed
 0029h  no binding
 002Ah  network may be disconnected
 002Bh  incompatible OS version
 002Ch  already registered
 002Dh  path not found
 002Eh  insufficient memory
 002Fh  info not found
 00FFh  general failure
 F000h-FFFFh reserved for vendor-specific codes, treated as general failure

Format of NDIS common characteristics table:
Offset  Size    Description     (Table 01435)
 00h    WORD    size of table in bytes
 02h    BYTE    NDIS major version
 03h    BYTE    NDIS minor version
 04h    WORD    reserved
 06h    BYTE    module major version
 07h    BYTE    module minor version
 08h    DWORD   module function flag bits
                bit 0: binding at upper boundary supported
                bit 1: binding at lower boundary supported
                bit 2: dynamically bound
                bits 3-31 reserved, must be 0
 0Ch 16 BYTEs   ASCIZ module name
 1Ch    BYTE    upper boundary protocol level (see #01436)
 1Dh    BYTE    upper boundary interface type
                for MACs: 1 = MAC
                for data links and transports: to be defined
                for session: 1 = NCB
                any level: 0 = private (ISV-defined)
 1Eh    BYTE    lower boundary protocol level (see #01436)
 1Fh    BYTE    lower boundary interface type
                same as offset 1Dh
 20h    WORD    module ID filled in by protocol manager
 22h    WORD    module DS
 24h    DWORD   system request entry point
 28h    DWORD   pointer to service-specific characteristics (see #01438,#01440)
                0000h:0000h if none
 2Ch    DWORD   pointer to service-specific status, or 0000h:0000h if none
                  (see #01441)
 30h    DWORD   pointer to upper dispatch table (see #01437)
                0000h:0000h if none
 34h    DWORD   pointer to lower dispatch table (see #01437)
                0000h:0000h if none
 38h  2 DWORDs  reserved, must be 0
Note:   for compatibility with NDIS 1.x.x, a major version of 00h is
          interpreted as 01h

(Table 01436)
Values for NDIS boundary protocol level:
 00h    physical
 01h    Media Access Control
 02h    Data link
 03h    network
 04h    transport
 05h    session
 FFh    not specified

Format of NDIS dispatch table:
Offset  Size    Description     (Table 01437)
 00h    DWORD   -> common characteristics table (see #01435)
 04h  4 BYTEs   ???
 08h    DWORD   -> ??? function (called with 12 bytes of stack arguments)
 0Ch    DWORD   -> ??? function (called with 10 bytes of stack arguments)
 10h    DWORD   -> ??? function (called with 16 bytes of stack arguments)
 14h    DWORD   -> ??? function (called with 4 bytes of stack arguments)
 18h    DWORD   -> ??? function (called with 18 bytes of stack arguments)
 1Ch    DWORD   -> ??? function (called with 12 bytes of stack arguments)

Format of MAC Service-Specific Characteristics Table:
Offset  Size    Description     (Table 01438)
 00h    WORD    length of table in bytes
 02h 16 BYTEs   ASCIZ MAC type name, "802.3", "802.4", "802.5", "802.6", "DIX",
                  "DIX+802.3", "APPLETALK", "ARCNET", "FDDI", "SDLC", "BSC",
                  "HDLC", or "ISDN"
 12h    WORD    length of station addresses in bytes
 14h 16 BYTEs   permanent station address
 24h 16 BYTEs   current station address
 34h    DWORD   current functional adapter address (00000000h if none)
 38h    DWORD   pointer to multicast address list
 3Ch    DWORD   link speed in bits/sec
 40h    DWORD   service flags (see #01439)
 44h    WORD    maximum frame size which may be both sent and received
 46h    DWORD   total transmit buffer capacity in bytes
 4Ah    WORD    transmit buffer allocation block size in bytes
 4Ch    DWORD   total receive buffer capacity in bytes
 50h    WORD    receive buffer allocation block size in bytes
 52h  3 BYTEs   IEEE vendor code
 55h    BYTE    vendor adapter code
 56h    DWORD   pointer to ASCIZ vendor adapter description
 5Ah    WORD    IRQ used by adapter
 5Ch    WORD    transmit queue depth
 5Eh    WORD    maximum supported number of data blocks in buffer descriptors
 60h  N BYTEs   vendor-specific info
SeeAlso: #01440

Bitfields for service flags:
Bit(s)  Description     (Table 01439)
 0      supports broadcast
 1      supports multicast
 2      supports functional/group addressing
 3      supports promiscuous mode
 4      station address software settable
 5      statistics always current
 6      supports InitiateDiagnostics
 7      supports loopback
 8      MAC does primarily ReceiveChain indications instead of ReceiveLookahead
        indications
 9      supports IBM source routing
 10     supports MAC reset
 11     supports Open/Close adapter
 12     supports interrupt request
 13     supports source routing bridge
 14     supports GDT virtual addresses (OS/2 version)
 15     multiple TransferDatas allowed durign a single indication
 16     MAC normally sets FrameSize = 0 in ReceiveLookahead
 17-31  reserved, must be 0

Format of NetBIOS Service-Specific Characteristics Table:
Offset  Size    Description     (Table 01440)
 00h    WORD    length of table in bytes
 02h 16 BYTEs   ASCIZ type name of NetBIOS module
 12h    WORD    NetBIOS module code
 14h  N BYTEs   vendor-specific info
SeeAlso: #01438

Format of MAC Service-Specific Status Table:
Offset  Size    Description     (Table 01441)
 00h    WORD    length of table in bytes
 02h    DWORD   seconds since 0:00 1/1/70 when diagnostics last run
                (FFFFFFFFh = never)
 06h    DWORD   MAC status bits (see #01442)
 0Ah    WORD    current packet filter flags (see #01443)
 0Ch    DWORD   pointer to media-specific status table or 0000h:0000h
 10h    DWORD   seconds past 0:00 1/1/70 of last ClearStatistics
 14h    DWORD   total frames received (FFFFFFFFh = not counted)
 18h    DWORD   frames with CRC error (FFFFFFFFh = not counted)
 1Ch    DWORD   total bytes received (FFFFFFFFh = not counted)
 20h    DWORD   frames discarded--no buffer space (FFFFFFFFh = not counted)
 24h    DWORD   multicast frames received (FFFFFFFFh = not counted)
 28h    DWORD   broadcast frames received (FFFFFFFFh = not counted)
 2Ch    DWORD   frames with errors (FFFFFFFFh = not counted)
 30h    DWORD   overly large frames (FFFFFFFFh = not counted)
 34h    DWORD   frames less than minimum size (FFFFFFFFh = not counted)
 38h    DWORD   multicast bytes received (FFFFFFFFh = not counted)
 3Ch    DWORD   broadcast bytes received (FFFFFFFFh = not counted)
 40h    DWORD   frames discarded--hardware error (FFFFFFFFh = not counted)
 44h    DWORD   total frames transmitted (FFFFFFFFh = not counted)
 48h    DWORD   total bytes transmitted (FFFFFFFFh = not counted)
 4Ch    DWORD   multicast frames transmitted (FFFFFFFFh = not counted)
 50h    DWORD   broadcast frames transmitted (FFFFFFFFh = not counted)
 54h    DWORD   broadcast bytes transmitted (FFFFFFFFh = not counted)
 58h    DWORD   multicast bytes transmitted (FFFFFFFFh = not counted)
 5Ch    DWORD   frames not transmitted--timeout (FFFFFFFFh = not counted)
 60h    DWORD   frames not transmitted--hardware error (FFFFFFFFh = not countd)
 64h  N BYTEs   vendor-specific info

Bitfields for MAC status bits:
Bit(s)  Description     (Table 01442)
 0-2    operational status
        000 hardware not installed
        001 hardware failed startup diagnostics
        010 hardware configuration problem
        011 hardware fault
        100 operating marginally due to soft faults
        101 reserved
        110 reserved
        111 hardware fully operational
 3      MAC bound
 4      MAC open
 5      diagnostics in progress
 6-31   reserved

Bitfields for packet filter flags:
Bit(s)  Description     (Table 01443)
 0      directed/multicast or group/functional
 1      broadcast
 2      promiscuous
 3      all source routing
 4-15   reserved, must be zero
--------D-214402-----------------------------
INT 21 U - MS-DOS 7.0+ - CONFIG$ device - GET CONFIGURATION INFORMATION
        AX = 4402h
        BX = file handle for character device "CONFIG$"
        CX = number of bytes to read (at least 5)
        DS:DX -> buffer for ??? data (see #01444)
Return: CF clear if successful
            AX = number of bytes actually read
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
SeeAlso: AX=4403h"CONFIG$"

Format of MS-DOS 7.0 CONFIG$ ??? data:
Offset  Size    Description     (Table 01444)
 00h    WORD    ??? (0000h)
 02h    WORD    ??? (0000h or value read from IO.SYS segment 70h)
 04h    BYTE    ??? (value read from IO.SYS segment 70h)
--------I-214402-----------------------------
INT 21 U - IBM SYSTEM 36/38 WORKSTATION EMULATION - VDI.SYS - GET ???
        AX = 4402h
        BX = handle for character device "GDMS"
        CX = number of bytes to read (>= 4)
        DS:DX -> buffer (see #01445)
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            AX = number of bytes read

Format of System 36/38 emulator returned data:
Offset  Size    Description     (Table 01445)
 00h  4 BYTEs   ???
 04h    DWORD   pointer to ???
 08h  4 BYTEs   ???
--------m-214402-----------------------------
INT 21 U - LASTBYTE.SYS v1.19 - IOCTL - GET ??? TABLE
        AX = 4402h
        BX = handle for device "LA$TBYTE"
        CX = 0004h
        DS:DX -> DWORD to hold address of 39-byte table of ???
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            AX = number of bytes read
Program: LASTBYTE.SYS is part of the shareware "The Last Byte" memory
          management package by Key Software Products
SeeAlso: AX=4402h"HIGHUMM"
--------m-214402-----------------------------
INT 21 - HIGHUMM.SYS v1.17+ - IOCTL - GET API ADDRESS
        AX = 4402h
        BX = handle for device "KSP$UMM"
        CX = 0004h
        DS:DX -> DWORD to hold entry point (see #01446)
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            AX = number of bytes read
Program: HIGHUMM.SYS is part of the shareware "The Last Byte" memory
          management package by Key Software Products
SeeAlso: AX=4402h"LASTBYTE"

(Table 01446)
Call HIGHUMM.SYS entry point with:
        AH = 00h allocate UMB (same as XMS function 10h) (see INT 2F/AX=4310h)
            DX = size in paragraphs
            Return: BX = segment number (if successful)
                    DX = size of requested block/size of largest block
        AH = 01h deallocate UMB (same as XMS func 11h) (see INT 2F/AX=4310h)
            DX = segment number of UMB
        AH = 02h request a bank-switched memory block
            DX = size in paragraphs
            Return: BX = segment number (if successful)
                    DX = size of requested block/size of largest block
        AH = 03h release a bank-switched memory block
            DX = segment number
        AH = 04h transfer data to/from high memory
            DS:SI -> source
            ES:DI -> destination
            CX = length in bytes
            Note: enables bank-switched memory, does the copy, then disables
                bank-switched memory
        AH = 05h get a word from bank-switched memory
            ES:DI -> word to read
            Return: DX = word
        AH = 06h put a word to bank-switched memory
            ES:DI -> word to write
            DX = word
        AH = 07h put a byte to bank-switched memory
            ES:DI -> byte to write
            DL = byte
        AH = 08h enable bank-switched memory
            DS:SI -> 6-byte status save area
        AH = 09h disable bank-switched memory
            DS:SI -> 6-byte save area from enable call (AH=08h)
        AH = 0Ah assign name to UMB or high bank-switched block
            DX = segment number
            DS:SI -> 8-byte blank-padded name
        AH = 0Bh locate UMB block by name
            DS:SI -> 8-byte blank-padded name
            Return: BX = segment number (if successful)
                    DX = size of block
        AH = 0Ch locate bank-switched block by name
            DS:SI -> 8-byte blank-padded name
            Return: BX = segment number (if successful)
                    DX = size of block
Return: AX = status code
            0001h successful
            0000h failed
                BL = error code
                    80h not implemented
                    B0h insufficient memory, smaller block available
                    B1h insufficient memory, no blocks available
                    B2h invalid segment number
Note:   only functions 00h and 01h are always available; the remaining
          functions are only enabled if the proper commandline switch is given
--------c-214402-----------------------------
INT 21 - SMARTDRV.SYS v3.x only - IOCTL - GET CACHE STATUS
        AX = 4402h
        BX = file handle for device "SMARTAAR"
        CX = number of bytes to read (min 28h)
        DS:DX -> buffer for status record (see #01447)
Return: CF clear if successful
            AX = number of bytes actually read
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Note:   NCache2 (from the Norton Utilities v8.0) attempts to support this
          interface, but does not do so correctly, often hanging the system;
          one should use the SmartDrive v4.x or NCache private interfaces
          (see INT 2F/AX=4A10h/BX=0000h,INT 2F/AX=FE00h/DI=4E55h)
SeeAlso: AX=4403h"SMARTDRV",INT 2F/AX=4A10h/BX=0000h

Format of SMARTDRV status record:
Offset  Size    Description     (Table 01447)
 00h    BYTE    write-through flag (always 01h)
 01h    BYTE    writes should be buffered (always 00h)
 02h    BYTE    cache enabled if 01h
 03h    BYTE    driver type (01h extended memory, 02h expanded)
 04h    WORD    clock ticks between cache flushes (currently unused)
 06h    BYTE    cache contains locked tracks if nonzero
 07h    BYTE    flush cache on INT 19 reboot if nonzero
 08h    BYTE    cache full track writes if nonzero
 09h    BYTE    double buffering (for VDS) state (00h off, 01h on, 02h dynamic)
 0Ah    DWORD   original INT 13 vector
 0Eh    BYTE    minor version number
 0Fh    BYTE    major version number
 10h    WORD    unused
 12h    WORD    sectors read                    \
 14h    WORD    sectors already in cache         > may be scaled rather than
 16h    WORD    sectors already in track buffer /  absolute counts
 18h    BYTE    cache hit rate in percent
 19h    BYTE    track buffer hit rate in percent
 1Ah    WORD    total tracks in cache
 1Ch    WORD    number of tracks in use
 1Eh    WORD    number of locked tracks
 20h    WORD    number of dirty tracks
 22h    WORD    current cache size in 16K pages
 24h    WORD    original (maximum) cache size in 16K pages
 26h    WORD    minimum cache size in 16K pages
 28h    DWORD   pointer to byte flag to increment for locking cache contents
--------d-214402-----------------------------
INT 21 - CD-ROM device driver - IOCTL INPUT
        AX = 4402h
        BX = file handle referencing character device for CD-ROM driver
        CX = number of bytes to read
        DS:DX -> control block (see #01449)
Return: CF clear if successful
            AX = number of bytes actually read
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Notes:  the data returned depends on the first byte of the control block
          (two bytes for functions 01h/07h/0Bh, see #01449); the remainder of
          the control block is filled by the driver
        some device drivers support several subunits (that is more than one
          drive) but it is not possible to distinguish between them with this
          function; use INT 2F/AX=1510h or INT 2F/AX=0802h instead
        under Windows95, the "mscd$$$$" device cannot be opened so you cannot
          obtain the handle required by this function: use INT 2F/AX=1510h
          or INT 2F/AX=0802h instead
SeeAlso: AX=4403h"CD-ROM",INT 2F/AX=0802h,INT 2F/AX=1510h

(Table 01448)
Values for CD-ROM data being requested:
 00h    device driver header address
 01h    drive head location
 02h    reserved
 03h    error statistics
 04h    audio channel info
 05h    raw drive bytes (uninterpreted and device-specific)
 06h    device status
 07h    sector size
 08h    volume size
 09h    media change status
 0Ah    audio disk info
 0Bh    audio track info
 0Ch    audio Q-Channel info
 0Dh    audio sub-channel info
 0Eh    UPC code
 0Fh    audio status info

Format of CD-ROM control block:
Offset  Size    Description     (Table 01449)
 00h    BYTE    data being requested (see #01448)
---function 00h---
 01h    DWORD   device driver header address (see also AH=52h,#01646)
---function 01h---
 01h    BYTE    (call) addressing mode
                00h HSG
                01h Red Book
 02h    DWORD   current location of drive's head
                logical sector number in HSG mode
                frame/second/minute/unused in Red Book mode
                (HSG sector = minute * 4500 + second * 75 + frame - 150)
---function 03h---
 01h  N BYTEs   undefined as of 5 Aug 88 specification
---function 04h---
 01h    BYTE    input channel (0-3) for output channel 0
 02h    BYTE    volume for output channel 0
 03h    BYTE    input channel (0-3) for output channel 1
 04h    BYTE    volume for output channel 1
 05h    BYTE    input channel (0-3) for output channel 2
 06h    BYTE    volume for output channel 2
 07h    BYTE    input channel (0-3) for output channel 3
 08h    BYTE    volume for output channel 3
Notes:  output channels 0 and 1 are left and right, 2 and 3 are left prime and
          right prime; a volume of 00h is off
        the default setting is for each input channel to be assigned to the
          same-numbered output channel at full (FFh) volume
---function 05h---
 01h    BYTE    number of bytes read
 02h 128 BYTEs  buffer for drive bytes
---function 06h---
 01h    DWORD   device parameters (see #01450)
---function 07h---
 01h    BYTE    (call) read mode
                00h cooked
                01h raw
 02h    WORD    (return) sector size in bytes
---function 08h---
 01h    DWORD   volume size in sectors
BUGS:   Aztech device driver v1.10 and v1.27 (at least) return the last sector
          number, i.e. total number of sectors - 1
        Windows95 returns the total number of sectors + 150 (see the Red Book
          to HSG conversion formula at function 01h to understand why this
          happens)
---function 09h---
 01h    BYTE    media change status
                00h don't know
                01h media unchanged
                FFh media has been changed
---function 0Ah---
 01h    BYTE    lowest audio track number
 02h    BYTE    highest audio track number
 03h    DWORD   start address of lead-out track (Red Book format)
--function 0Bh---
 01h    BYTE    (call) track number
 02h    DWORD   starting point of track (Red Book format)
 06h    BYTE    track control info
                bits 15,14,12: track type (notice: bits not contiguous!)
                        000 two audio channels, no pre-emphasis
                        001 two audio channels with pre-emphasis
                        010 data track
                        100 four audio channels, no pre-emphasis
                        101 four audio channels with pre-emphasis
                        other reserved
                bit 13: digital copy permitted
---function 0Ch---
 01h    BYTE    CONTROL and ADR byte (as received from drive)
 02h    BYTE    track number
 03h    BYTE    point or index
 04h    BYTE    minute  \
 05h    BYTE    second   > running time within track
 06h    BYTE    frame   /
 07h    BYTE    zero
 08h    BYTE    "AMIN" or "PMIN"     \
 09h    BYTE    "ASEC" or "PSEC"      > running time on disk
 0Ah    BYTE    "AFRAME" or "PFRAME" /
---function 0Dh---
 01h    DWORD   starting frame address (Red Book format)
 05h    DWORD   transfer address
 09h    DWORD   number of sectors to read
Note:   copies 96 bytes of sub-channel info per sector into buffer
---function 0Eh---
 01h    BYTE    CONTROL and ADR byte
 02h  7 BYTEs   UPC/EAN code (13 BCD digits,low-order nybble of last byte is 0)
 09h    BYTE    zero
 0Ah    BYTE    "AFRAME"
---function 0Fh---
 ??? documentation not yet available
 01h    WORD    pause status (0000h not paused, 0001h paused)
 03h    DWORD   audio play start address
 07h    DWORD   ??? audio play length or end address

Bitfields for CD-ROM device parameters:
Bit(s)  Description     (Table 01450)
 0      door open
 1      door unlocked
 2      supports raw reading in addition to cooked
 3      writable
 4      can play audio/video tracks
 5      supports interleaving
 6      reserved
 7      supports prefetch requests
 8      supports audio channel control
 9      supports Red Book addressing in addition to HSG
 10     audio is playing
 11     no disk in drive
 12     supports R-W subchannels
--------m-214402-----------------------------
INT 21 - Quarterdeck - QEMM-386 v5+ - GET API ENTRY POINT
        AX = 4402h
        BX = file handle for device "QEMM386$"
        CX = 0004h
        DS:DX -> DWORD buffer for API entry point
Return: CF clear if successful
            buffer filled (refer to INT 67/AH=3Fh for entry point parameters)
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Note:   Quarterdeck recently (June 1993) documented this function, but the
          documentation incorrectly states that it is only available for
          QEMM 6+
SeeAlso: AX=4402h"HOOKROM",INT 2F/AX=D201h/BX=5145h,INT 67/AH=3Fh
--------Q-214402-----------------------------
INT 21 U - Quarterdeck - HOOKROM.SYS - GET HOOKED VECTOR TABLE
        AX = 4402h
        BX = file handle for device "HOOKROM$"
        CX = 0004h
        DS:DX -> DWORD buffer for address of hooked vector table (see #01451)
Return: CF clear if successful
            DS:DX buffer filled
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
SeeAlso: AX=4402h/SF=01h

Format of HOOKROM.SYS hooked vector table entry:
Offset  Size    Description     (Table 01451)
 00h  5 BYTEs   FAR jump to actual interrupt handler
                (end of table if first byte is not EAh)
 05h    BYTE    interrupt vector number
--------d-214402-----------------------------
INT 21 - Advanced SCSI Programming Interface (ASPI) - INTERFACE
        AX = 4402h
        BX = file handle for device "SCSIMGR$"
        CX = 0004h or 0005h (refer to notes below)
        DS:DX -> buffer for result (see #01452), set to zeros before call
Return: CF clear if successful
            AX = 0004h or 0005h (refer to notes below)
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Notes:  the variant of the call requesting five bytes is an UNDOCUMENTED
          extension supported by Adaptec's ASPI2DOS.SYS, ASPI4DOS.SYS, and
          ASPI7DOS.SYS; if made of a host manager which does not support the
          variant, only four bytes will be returned.  If the variant is
          supported, Adaptec's WINASPI.DLL assumes that the host manager is
          an "advanced" one which operates in either real or protected mode
          (and thus does not require a DPMI INT 31/AX=0301h call to be invoked
          from protected mode).  Support of the five-byte variant also appears
          to imply that an advanced ASPI host manager uses no temporary
          storage space except the SRB (see #01454) and the stack, and that it
          is fully reentrant.
        if called with a standard request for four bytes, even Adaptec's
          advanced drivers return only the requested four bytes containing the
          ASPI entry point address
        the function address is called with the address of a SCSI Request
          Block (see #01454) on the stack and the caller must clean up the
          stack
SeeAlso: AX=440Ch"ASPITAPE",INT 11/AH=FFh"WD7000"

Format of ASPI IOCTL result:
Offset  Size    Description     (Table 01452)
 00h    DWORD   function address
 04h    BYTE    number of SCSI host adapters supported by host manager

(Table 01453)
Values for ASPI request number:
 00h    "HA_INQ"        host adapter inquiry / extended host adapter inquiry
 01h    "GET_TYPE"      get device type
 02h    "EXEC_SIO"      execute SCSI I/O
 03h    "ABORT_SRB"     abort SRB
 04h    "RESET_DEV"     reset SCSI device
 05h    "SET_HAPRMS"    set host adapter parameters
 06h    get disk drive information

Format of SCSI Request Block (64 bytes):
Offset  Size    Description     (Table 01454)
 00h    BYTE    request number (see #01453)
 01h    BYTE    request status (see #01455)
 02h    BYTE    host adapter ID
 03h    BYTE    request flags (see #01456)
 04h    DWORD   reserved (0)
---request 00h---
 08h    BYTE    (ret) number of host adapters
 09h    BYTE    (ret) target adapter ID
 0Ah 16 BYTEs   (ret) SCSI manager ID
 1Ah 16 BYTEs   (ret) host adapter ID
 2Ah 16 BYTEs   (ret) host adapter-unique parameters
---extended request 00h---
 04h  2 BYTEs   (call) extended request signature 55h AAh
                (ret) if extended request supported, reply AAh 55h
 06h    WORD    (call) length of extended buffer at offset 3Ah
                (ret) number of bytes returned in extended buffer
 08h    BYTE    (ret) number of host adapters
 09h    BYTE    (ret) target adapter ID
 0Ah 16 BYTEs   (ret) SCSI manager ID
 1Ah 16 BYTEs   (ret) host adapter ID
 2Ah 16 BYTEs   (ret) host adapter-unique parameters
 3Ah  N BYTEs   extended buffer
                3Ah     WORD    features (see #01457)
                3Ch     WORD    maximum scatter/gather list length
                3Eh     DWORD   maximum SCIS data transfer size (0 = unlimited)
---request 01h---
 08h    BYTE    target ID
 09h    BYTE    logical unit number
 0Ah    BYTE    (ret) device type (see #01460)
---request 02h---
 08h    BYTE    target ID
 09h    BYTE    logical unit number
 0Ah    DWORD   data allocation length
                (ret) residual byte length (if supported and requested)
 0Eh    BYTE    sense allocation length
 0Fh    DWORD   data buffer pointer
 13h    DWORD   next request pointer (for linking)
 17h    BYTE    CDB length
 18h    BYTE    (ret) host adapter status (see #01454)
 19h    BYTE    (ret) target status (see #01459)
 1Ah    DWORD   post routine address (see #01466)
 1Eh    WORD    real mode Post DS
 20h    DWORD   SRB pointer
 24h    WORD    reserved
 26h    DWORD   SRB physical address
 2Ah 22 BYTEs   SCSIMGR$ workspace
 40h  N BYTEs   CCB, including sense data (20-24 bytes)
---request 03h---
 08h    DWORD   address of SRB to abort
---request 04h---
 08h    BYTE    target ID
 09h    BYTE    logical unit number
 0Ah 14 BYTEs   reserved
 18h    BYTE    (ret) host adapter status (see #01458)
 19h    BYTE    (ret) target status (see #01459)
 1Ah    DWORD   post routine address
 1Eh 34 BYTEs   workspace
---request 05h---
 08h 16 BYTEs   host adapter-unique parameters
---request 06h---
 08h    BYTE    target ID
 09h    BYTE    logical unit number
 0Ah    BYTE    disk drive flags (see #01461)
 0Bh    BYTE    INT 13h drive number
 0Ch    BYTE    preferred head number translation
 0Dh    BYTE    preferred sector size translation
 0Eh 10 BYTEs   reserved
SeeAlso: #01462

(Table 01455)
Values for ASPI request status:
 00h    not done yet
 01h    completed successfully
 02h    aborted by host
 04h    SCSI I/O error
 80h    invalid
 81h    no adapter
 82h    no device attached
 else   status
SeeAlso: #01454

Bitfields for ASPI request flags:
Bit(s)  Description     (Table 01456)
 0      posting enabled
 1      linking enabled
 2      residual byte length reported in Data Allocation Length field
 3      transfer from SCSI target to host
 4      transfer from host to SCSI target
 5      scatter/gather
 7-6    reserved
Note:   no data is transferred if both bits 3 and 4 are set; if neither is
          set, the direction is determined by the SCSI command
SeeAlso: #01454

Bitfields for ASPI extended features:
Bit(s)  Description     (Table 01457)
 0      scatter/gather supported
 1      residual byte length reported
 2      Wide SCSI 16 host adapter
 3      Wide SCSI 32 host adapter
 15-4   reserved
SeeAlso: #01454

(Table 01458)
Values for host adapter status:
 00h    no error detected
 11h    select timeout
 12h    data overrun
 13h    bus error
 14h    bus failure

(Table 01459)
Values for target status:
 00h    no status
 02h    sense data stored in SRB
 08h    target busy
 18h    reservation error

(Table 01460)
Values for device type:
 00h    disk drive
 01h    tape drive (streamer)
 02h    printer
 03h    processor
 04h    WORM drive
 05h    CD-ROM drive
 06h    scanner
 07h    optical drive
 08h    autochanger
 09h    communications device

(Table 01461)
Values for disk drive flags:
 00h    no INT 13 access
 01h    INT 13 with DOS access
 02h    INT 13 without DOS access
 03h    invalid flags

Format of CCB:
Offset  Size    Description     (Table 01462)
 00h    BYTE    command code (see #01463)
 01h    BYTE    flags
                bits 4-0: vary by function
                bits 7-5: logical unit number
 02h    BYTE    "adr_1"
 03h    BYTE    "adr_0"
 04h    BYTE    length
 05h    BYTE    control
        ...
 06h/0Ah 14 BYTEs buffer for sense data (see #01464)
SeeAlso: #01454

(Table 01463)
Values for CCB command code:
 00h    test unit ready
 01h    rewind
 03h    request sense data
 05h    get block size limits
 08h    Group 0 read
 0Ah    Group 0 write
 10h    write file marks
 11h    SCSI Space (set position?)
 12h    SCSI Inquire
 15h    set mode information
 16h    reserve SCSI device
 17h    release SCSI device
 19h    erase
 1Ah    request mode information
 1Bh    load/unload media
 1Dh    request target self-check
 24h    set window parameters
 25h    get window parameters
 28h    Group 1 read
 2Ah    Group 1 write
 31h    document feeder control
 34h    get scan data status
---vendor-specific commands---
 D3h    get document feeder status
 D4h    set document feeder mode

Format of sense data:
Offset  Size    Description     (Table 01464)
 00h    BYTE    error code (bit 7 set if valid)
 01h    BYTE    segment number
 02h    BYTE    sense key
                bit 6: EOM
                bit 5: ILI
                bits 0-3: sense key (see #01465)
 03h  4 BYTEs   information bytes
 07h    BYTE    additional sense length (0Ah)
 08h  4 BYTEs   command-specific information
 0Ch    BYTE    additional sense code
 0Dh    BYTE    additional sense code qualifier
 0Eh    BYTE    field replaceable unit code
 0Fh  3 BYTEs   sense key specific bytes

(Table 01465)
Values for sense key:
 00h    no sense data
 02h    SCSI unit not ready
 03h    media error
 04h    unrecoverable hardware error
 05h    illegal parameter in CDB
 06h    target has been reset
 0Bh    target aborted command

(Table 01466)
Values APSI post function is called with:
        STACK:  DWORD -> SRB (see #01454) which completed
        interrupts disabled
Return: EBP, EBX, ESI, EDI must be preserved
        interrupts disabled
Note:   the post function may issue any APSI function except an abort; it
          should complete as quickly as possible
--------m-214402-----------------------------
INT 21 U - Qualitas 386MAX v6.00+ - IOCTL INPUT - GET STATE
        AX = 4402h
        BX = file handle for device "386MAX$$"
        CX = number of bytes to read
        DS:DX -> BYTE 03h followed by 386MAX state buffer (see #01467)
Return: CF clear if successful
            buffer at DS:DX+1 filled
            AX = number of bytes actually copied
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Notes:  if the value given in CX is less than the size of the state record
          (5Ah for v6.01, 66h for v7.00), only a partial state record will be
          returned
        the state is 40h bytes for 386MAX (actually ASTEMM) v2.20 ("386MAX$$"
          did not exist yet, use "QMMXXXX0" and then "EMMXXXX0" instead) and
          56h bytes for v5.11.
        to invoke 386MAX API functions, push DX onto the stack, load DX with
          the word at offset 25h in the returned state, load all other
          registers as needed for the desired function, and execute an
          OUT DX,AL or OUT DX,AX; DX will be set to the pushed value on return
          if it is not otherwise modified by the API function.  For safety,
          in case a function is not supported or 386MAX is not present, SP
          should be saved and restored around the API call.
        Windows 3.1 Standard mode, LAN Manager, and Windows for Workgroups all
          use the 386MAX API; LAN Manager and Windows for Workgroups reportedly
          make some calls incorrectly
SeeAlso: AX=4403h/SF=03h"386MAX",INT 67/AH=3Fh

Format of 386MAX v6.01+ state:
Offset  Size    Description     (Table 01467)
 -1     BYTE    (call) 03h
 00h  6 BYTEs   signature "386MAX"
 06h  4 BYTEs   version string "N;NN" or "N.NN" (i.e. "6;01" for v6.01)
                (';' by default; apparently changed to a period when 386MAX
                has linked high RAM into DOS's memory chain)
 0Ah    WORD    segment of low-memory portion of 386MAX.SYS
 0Ch  2 BYTEs   ???
 0Eh    WORD    segment of ??? memory block or 0000h
 10h    WORD    bit flags 1 (see #01468)
 12h    WORD    starting address of video memory in KB
 14h  2 BYTEs   ???
 16h    WORD    total high DOS memory in KB
 18h  2 BYTEs   ???
 1Ah    WORD    available shared memory in KB
 1Ch    WORD    KBytes extended memory used by 386MAX
 1Eh  2 BYTEs   ???
 20h    WORD    total extended memory in KB
 22h    WORD    IO port to write (OUT DX,AL) to invoke 386MAX INT 15 functions
 24h    WORD    IO port to write (OUT DX,AL) to invoke 386MAX API functions
                  (see #01481)
 26h    WORD    ??? (depends on DOS version)
 28h    WORD    size of ??? in paragraphs
 2Ah    DWORD   machine type (see #01476)
 2Eh    DWORD   -> first DOS memory control block
 32h    WORD    system configuration flags (see #01469)
 34h    WORD    debugging flags 1 (see #01470)
 36h    WORD    debugging flags 2 (see #01471)
 38h  2 BYTEs   ???
 3Ah    WORD    segment of first MCB in high memory chain
 3Ch    WORD    feature flags 1 (see #01473)
 3Eh    WORD    feature flags 2 (see #01474)
 40h    WORD    feature flags 3 (see #01475)
 42h    WORD    segment of first 386MAX control block??? (see #01477)
 44h    WORD    amount of memory to report available on INT 15/AH=88h
 46h  4 BYTEs   ???
 4Ah    WORD    number of K at start of address space swapped with fast
                  extended memory (SWAP= parameter)
 4Ch  2 BYTEs   ???
 4Eh    WORD    segment address of ???
 50h    WORD    debugging flags 3 (see #01472)
 52h    DWORD   old INT 21h
 56h    DWORD   pointer to 386MAX's EMS (INT 67h) handler
---386MAX v7.00---
 5Ah    DWORD   KB of extended memory managed by 386MAX
 5Eh    DWORD   bytes of extended memory (EXT= parameter)
 62h  4 BYTEs   ???

Bitfields for 386MAX bit flags 1:
Bit(s)  Description     (Table 01468)
 1      ???
 2      allow A20 to be enabled/disabled???
 3      ??? (cleared by calling INT 67 functions or starting MSWindows)
 4      high RAM present???
 5      386MAX in AUTO mode
 6      386MAX enabled
 7      386MAX is providing EMS services
 8      ??? (affects API function 08h)
 9      A20 gate closed (A20 disabled) (see INT 15/AX=2402h)
 10     Weitek support enabled
 11     ???
 12     ROMs not shadowed???
 13     QPMS has been used
 14     ???
 15     ???

Bitfields for 386MAX system configuration flags:
Bit(s)  Description     (Table 01469)
 1      ROM compressed???
 3      ???
 5      386MAX loaded into high memory
 6      Microchannel bus
 7      Weitek math coprocessor detected
 9      ??? (also generates INT 01 on ??? and INT 03 on ???)
 11     PC/XT (thus only single 8259 interrupt controller present, DMA only
                in 1st megabyte, etc)
 13     LMLTOP= specified
 14     enable A20 control???
 15     ???

Bitfields for 386MAX debugging flags 1:
Bit(s)  Description     (Table 01470)
 0      DEBUG=LED
 1      DEBUG=X67
 2      DEBUG=INV
 3      DEBUG=EMSPTED
 4      DEBUG=JMP
 5      DEBUG=CALL
 6      DEBUG=HLT
 7      DEBUG=PMR
 8      DEBUG=CR3
 9      DEBUG=CAPS or DEBUG=INT
 10     DEBUG=RC
 11     DEBUG=ROM
 12     DEBUG=XM
 13     DEBUG=SOR
 14     DEBUG=XR
 15     DEBUG=EMSERR (generate INT 01 on returning error from EMS call)

Bitfields for 386MAX debugging flags 2:
Bit(s)  Description     (Table 01471)
 0      DEBUG=ROMSWAP
 1      DEBUG=UNSHADOWROM
 2      DEBUG=COMPROM
 3      DEBUG=DPMIPHYS
 4      DEBUG=ALLROM
 5      DEBUG=VMS
 6      DEBUG=XMS (generate INT 01 on XMS calls)
 7      DEBUG=I06
 8      DEBUG=VCPI
 9      DEBUG=XDMA
 10     DEBUG=X09
 13     DEBUG=I67 (generate INT 01 on every INT 67 call)
 14     DEBUG=EVM (generate INT 01 on entering V86 mode)
 15     DEBUG=EMSSAVE or DEBUG=VDS

Bitfields for 386MAX debugging flags 3:
Bit(s)  Description     (Table 01472)
 10     DEBUG=EPM
 12     DEBUG=ABIOS
 13     DEBUG=XMSPTED
 14     DEBUG=TIME
 15     DEBUG=SCRUB

Bitfields for 386MAX feature flags 1:
Bit(s)  Description     (Table 01473)
 1      Weitek present
 2      no DPMI services
 3      NODMA
 4      TERSE
 5      NOROM
 6      NOPARITY
 8      NOFLEX (IGNOREFLEXFRAME)
 11     don't create UMBs
 12     don't backfill below video memory (NOLOW)
 13     FRAME= specified
 14     EXT= specified
 15     NOEMS, allow prior expanded memory manager to provide EMS

Bitfields for 386MAX feature flags 2:
Bit(s)  Description     (Table 01474)
 0      UNSHIFT specified (FORCEA20 disabled)
 1      NOXRAM
 2      NOSCSI specified
 3      SCREEN specified
 4      enabled EISADMA
 5      slow DMA
 6      RESETKEYB specified
 7      ???
 9      TOP384
 10     ???
 11     NOWARMBOOT
 12     USE= specified
 13     ROM= specified

Bitfields for 386MAX feature flags 3:
Bit(s)  Description     (Table 01475)
 0      Windows3 support enabled
 1      SHADOWROM
 2      don't compress ROM (NOCOMPROM)
 3      ??? (related to PRGREG=)
 4      ??? (related to PRGREG=)
 5      SHADOWRAM
 6      DOS4 specified
 7      NOLOADHIGH
 8      NOPULSE
 11     FORCEA20
 12     DMA buffer enabled
 13     NOSCRUB
 15     NOFRAME

Bitfields for 386MAX machine type:
Bit(s)  Description     (Table 01476)
 12     Amstrad
 13     Epson
 14     Zenith Data Systems
 15     "ASEM"
 16     NEC
 17     "HPRS" model codes 69h and 6Ah
 18     Dell
 19     "CA"
 20     ITT (Xtra Business Systems/Alcatel)
 21     Toshiba 5100
 22     Olivetti
 23     Quadram Quad386 (BIOS model FEh, submodel A6h)
 24     Tandy???
 25     AST 386
 26     INBOARD, ??? version
 27     INBOARD, ??? version
 28     INBOARD, ??? version
 29     "HPRS"
 30     Compaq 386
 31     JET386

Format of 386MAX control block:
Offset  Size    Description     (Table 01477)
 00h    WORD    segment of next block (FFFFh if last)
 02h    WORD    segment of previous block (FFFFh if first)
 04h 12 BYTEs   filename
 10h    WORD    resident size in paragraphs
 12h    WORD    environment size???
 14h    WORD    real prsent environment size + 1 (0000h if ENVSAVE used)
 16h  2 BYTEs   ???
 18h    DWORD   initial size or SIZE=n in 386LOAD commandline
 1Ch    DWORD   SIZE=-1 ???
 20h    DWORD   SIZE= ???
 24h    BYTE    PRGREG= if specified, else FFh
 25h    BYTE    ENVREG= if specified, else FFh
 26h    BYTE    FlexFrame (00h not present, 01h present)
 27h  3 BYTEs   ???
 2Ah    BYTE    GROUP= or 00h if not present
 2Bh    BYTE    ???
 2Ch    WORD    PSP

Format of 386MAX high memory info record:
Offset  Size    Description     (Table 01478)
 00h    WORD    segment address of memory region
 02h    WORD    size of memory region in paragraphs
 04h    BYTE    type or flags???
                00h if locked out
                02h if EMS page frame
                04h if high RAM
                42h if ROM
 05h    BYTE    ???

Format of 386MAX ROM shadowing record:
Offset  Size    Description     (Table 01479)
 00h    WORD    logical start segment of ROM??? (may be used by BlueMAX when it
                  squeezes together the ROMs to make room)
 02h    WORD    physical start segment of ROM
 04h  2 BYTEs   ???
 06h    WORD    size of shadowed ROM in paragraphs
 08h  2 BYTEs   ???
 0Ah    WORD    flags
                bit 15: shadowing enabled for this ROM???
                bit 14: ???
                bit 13: ???
                bit 12: ???
                bit 10: ???

(Table 01480)
Values for 386MAX memory type:
 00h    unused by EMS
 01h    DOS
 04h    page frame overlapping ROM???
 80h    high memory
 84h    page frame???
 87h    video ROM???
Note:   the type may be 00h (unused) if the 16K page is split among different
          uses (such as ROM and high RAM)

(Table 01481)
Call 386MAX API (via OUT DX,AL) with:
        STACK: WORD value for DX
        AH = 00h unused
                Return: AH = 84h (unsupported function)
        AH = 01h get high memory information
                ES:DI -> buffer for array of high memory info records
                        (see #01478)
                Return: CX = number of records placed in buffer
        AH = 02h get shadowed ROM info
                ES:DI -> buffer for array of ROM shadowing records (see #01479)
                Return: CX = number of records placed in buffer
        AH = 03h get 386MAX state
                ES:DI -> 90-byte buffer for state (see #01467)
                Return: AH = 00h (successful)
                        buffer filled
        AH = 04h get memory types???
                ES:DI -> buffer for memory type info (array of bytes, one per
                        16K page) (see #01480)
                Return: CX = number of bytes placed in buffer
        AH = 05h get page table entries
                AL = A20 control (00h enable A20 first, 01h leave unchanged)
                CX = buffer size in bytes (0000h = enough for all memory from
                        given start to end of memory managed by 386MAX)
                SI = first K to report (rounded down to 4K page)
                ES:DI -> buffer for returned page table entries
                Return: CX = number of bytes returned (four per 4K page)
                        ES:DI buffer filled
        AH = 06h get memory speed info
                ES:DI -> buffer for memory speed records (see #01482)
                Return: AH = 00h (successful)
                        CX = number of bytes placed in buffer
                Note:   this function can take over a second to execute
        AH = 07h map/unmap multiple handle pages
                DX = EMS handle (on stack)
                STACK: DWORD -> EMS mapping record
                Return: AH = status (00h,80h,83h,8Ah,8Bh)
                Format of EMS mapping record:
                Offset  Size    Description
                 00h    WORD    function
                                0000h use physical page numbers
                                0001h use segment addresses
                 02h    WORD    EMS handle
                 04h    WORD    number of mapping entries following
                 06h 2N WORDs   logical page number and physical page/segment
                                logical page FFFFh means unmap physical page
                SeeAlso: INT 67/AH=50h
        AH = 08h "EMM2_GOREAL" check whether possible to disable 386MAX
                AL = ??? (00h or nonzero)
                Return: AH = status (00h OK, A4h not possible at this time)
                Note:   if AL=00h, this function always returns success
        AH = 09h toggle Bit Flags 1 flags
                BX = bitmask of bit flags 1's flags to toggle (see #01468)
                Return: AH = 00h (successful)
                Note:   enables A20 first
        AH = 0Ah toggle Debugging Flags 1 flags
                BX = bitmask of Debugging Flags 1's bits to toggle (see #01470)
                Return: AH = 00h (successful)
                Notes:  enables A20 first
                        does ??? if bit 3 on after specified bits are toggled
        AH = 0Bh toggle Debugging Flags 2 flags
                BX = bitmask of Debugging Flags 2's bits to toggle (see #01471)
                Return: AH = 00h (successful)
                Note:   enables A20 first
        AH = 0Ch toggle feature flags 3
                BX = bitmask of feature flags 3's bits to toggle (see #01475)
                Return: AH = 00h (successful)
                Note:   enables A20 first
        AH = 0Dh specify 386MAX high-memory location
                BX = segment address of high-memory real-mode portion of 386MAX
                CX = current segment of real-mode stub???
                Return: AH = status (00h successful)
                        ???
        AH = 0Eh CRT controller register virtualization
                AL = subfunction
                    00h allow access to CRTC I/O ports 03B4h/03B5h, 03D4h/03D5h
                    01h trap accesses to CRTC I/O ports
        AH = 0Fh reboot system
                Return: never
        AH = 10h unused
                Return: AH = 84h (unsupported function)
        AH = 11h get high memory information
                ES:DI -> 96-byte buffer for high memory info
                Return: AH = 00h (successful)
                        ES:DI buffer filled
                Notes:  each byte in buffer contains bit flags for a 4K page in
                          the A000h-FFFFh region
                                bit 0: page is writeable
                                bit 1: physical address same as linear address
                                bit 2: EMS page frame
                                bit 6: page is part of the QPMS window
                        this function can take over a second to execute,
                          because it does a 128K read for each page in an
                          attempt to flush any RAM cache the system may have
        AH = 12h shadow RAM mapping
                AL = subfunction
                    00h unshadow ROMs (except page FFh if NOWARMBOOT set)
                    01h map shadow RAM into ROM regions???
                Return: AH = 00h (successful) if AL=00h or 01h
                        AH = 8Fh otherwise
        AH = 13h shadow RAM page protection
                AL = subfunction
                    00h set all shadowed ROM 4K pages to read-only
                    01h set all shadowed ROM 4K pages to read-write
                Return: AH = 00h (successful) if AL=00h or 01h
                        AH = 8Fh otherwise
        AH = 14h get Programmable Option Select info???
                ES:DI -> 54-byte buffer for POS data???
                Return: AH = 00h if successful
                        AH = A4h on error
                Note:   the buffer consists of nine 6-byte fields; the first
                          eight for slots 1-8, the last for the system board
        AH = 15h ???
                ???
                Return: ???
        AH = 16h get 386MAX memory usage screen
                ES:DI -> buffer for memory info display
                CX = size of buffer in bytes
                Return: ES:DI buffer filled with '$'-terminated string (if
                                large enough to hold entire usage screen)
                Note:   the screen is 0303h bytes in v7.00
        AH = 17h Windows 3 startup/termination
                AL = subfunction
                    00h Windows3 initializing
                        DX (on stack) = Windows startup flags
                        DI = Windows version number (major in upper byte)
                        ES:BX = 0000h:0000h
                        DS:SI = 0000h:0000h
                        Return: CX = 0000h if OK for Windows to load
                                   <> 0 if Windows should not load
                                ES:BX -> startup info structure
                                DS:SI -> Virtual86 mode enable/disable callback
                    01h Windows3 terminating
                        ES:BX -> ???
                        DX (on stack) = Windows exit flags
                        Return: ???
        AH = 18h QPMS (Qualitas Protected Memory Services)
                AL = subfunction
                    00h get QPMS configuration
                        Return: BX = starting segment of QPMS memory window
                                CX = number of 4K pages reserved for QPMS???
                                DX = number of 4K pages in QPMS window???
                    01h map QPMS memory page???
                        BX = 4K page number within memory reserved for QPMS???
                        CL = 4K page number within QPMS memory window???
                    02h mark all QPMS memory read-only
                    03h mark all QPMS memory read-write
                Return: AH = status (00h,8Ah,8Bh,8Fh)
        AH = 19h get linear address for physical address
                EDX = physical address (low word on stack)
                Return: AH = status
                            00h successful
                                EDX = linear address at which physical address
                                        may be accessed
                            8Bh physical address currently not addressable
                Note:   enables A20 first
        AH = 1Ah set page table entry
                EDX = new page table entry (low word on stack)
                ESI = linear address of page to map (bits 0-11 clear)
                Return: AH = status (00h,8Bh)
                Note:   enables A20 first
        AH = 1Bh get ???
                Return: AH = status
                        BX = ???
                        CX = number of ???
                        EDX = physical address of ???
        AH = 1Ch get original interrupt vector
                AL = interrupt vector (00h-7Fh)
                Return: AH = 00h (successful)
                        EDX = original vector before 386MAX loaded (segment in
                                high word, offset in low word)
                Note:   no range checking is performed; requests for INTs 80h-
                          FFh will return random values
        AH = 1Dh display string???
                SI = ???
                Return: AH = 00h (successful)
                        ???
                Note:   this function appears to be broken in v7.00
        AH = 1Eh get memory info
                ES:DI -> memory info (see #01483)
                Return: ???
        AH = 1Fh get DPMI host information
                Return: AX = 0000h if successful
                        BX = DPMI flags (see #03152 at INT 31/AX=0400h)
                        CL = CPU type (02h = 80286, 03h = 80386, etc.)
                        DX = DPMI ver supported (DH=major, DL=2-digit minor)
                        SI = ???
                        ES???:DI -> ???
                Note:   NOP if NODPMI switch specified
        AH = 20h (v7.00) get ???
            AL = index of ???
            Return: EDX = ??? for specified ???
        AH = 21h (v7.00) STACKS support
            AL = 00h get STACKS parameters
                Return: BX = ??? (0060h for v7.00)
                        CX = number of stacks for hardware interrupts
                        DX = size of each stack in bytes
                        SI = ??? (low and high bytes are separate values)
                        DI = ??? (low and high bytes are separate values)
                            low byte = logical page number set by subfn 02h
                        ES = ???
            AL = 01h set ??? "EMM2_DSTKS"
                EBX = ???
                ECX = ???
            AL = 02h set ???
                BL = logical page number for ??? (00h-03h)
                Return: AH = status (00h,8Ah)
        AH = 22h (v7.00) call ??? for every load module
            AL = which function to call
                00h call ???
                else call ????
            Return: AH = 00h
            Note: if AL=00h, calls the protected-mode function pointed at by
                the DWORD at offset 22h from the start of each module installed
                by a LOAD= directive; if AL<>00h, it calls the function
                pointed at by the DWORD at offset 28h of the load module
        AH = 23h (v7.00) ???
            AL = 00h set ???
                BL = ???
                Return: AH = 00h or unchanged (depending on ???)
            AL = 01h set ???
                BL = ???
                BH = ???
                CX = ???
                DX = ??? (on top of stack)
                Return: AH = status (00h if successful, 8Fh once table full)
                Note:   this call adds one entry to an internal table on each
                          call, until the table is full
            AL = 02h get ???
                CX = size of buffer
                ES:DI -> buffer for ??? (60 bytes total data)
                Return: CX = number of bytes actually returned
                Note:   returns the array storing the values set with AX=2301h
                Format of one entry in array:
                Offset  Size    Description
                 00h    BYTE    ??? (BL from subfn 01h)
                 01h    WORD    ??? (CX from subfn 01h)
                 03h    BYTE    ??? (BH from subfn 01h)
                 04h    WORD    ??? (DX from subfn 01h)
            AL = 03h set ??? name/path
                ES:DI -> buffer containing ASCIZ ???
            AL = 04h get ???
                ES:DI -> buffer for ASCIZ ???
            Note: the ASCIZ string for subfunctions 03h and 04h does not appear
                to be used by 386MAX, and may serve merely for communication
                between two other Qualitas programs
        AH = 24h (v7.00) high memory control
            AL = 00h get high memory state
                Return: BX = current state
                            00h high memory removed from DOS memory chain
                            01h high memory included in DOS memory chain
            AL = 01h set high memory state
                BX = new state
                    00h high memory removed from DOS memory chain
                    01h high memory included in DOS memory chain
                    else
                        Return: ??? (error, but return varies according to ???)
        AH = 25h (v7.00) remove high RAM from DOS memory chain
        AH = 26h (v7.00) ???
            BX = ???
            CX = ???
            SI = ???
            DI = ???
            Return: AH = status
                    BX = ???
                    CX = ???
        AH = 27h (v7.00) ???
            AL = 00h get ???
                Return: BX = number of paragraphs for ???
            AL = 01h ???
                BX = ???
                ES??? = ???
            AL = 02h ???
                ???
            AL = 03h ???
                CX = ???
                DX = ???
                ES??? = ???
                Return: ???
        AH = 28h (v7.00) get ???
                Return: AH = status (00h,8Fh) (see #03648 at INT 67/AH=40h)
                        if AH=00h,
                            CX = ???
                            DX = ???
        AH = 29h (v7.00) get ???
                Return: AX = ???
        AH = 40h-5Dh EMS services (see INT 67/AH=40h, etc.)
        AH = DEh VCPI services (see INT 67/AX=DE00h, etc.)
Return: AH = status (as for EMS INT 67 calls)
            00h successful
            80h internal error
            81h hardware malfunction
            83h invalid handle
            84h undefined function
            8Ah invalid logical page nuber
            8Bh illegal physical page number
            8Fh undefined subfunction
            A4h access denied
            etc.
        STACK popped (value placed in DX if no specific return value for DX)

Format of 386MAX memory speed record:
Offset  Size    Description     (Table 01482)
 00h    DWORD   page table entry for 4K page
 04h    WORD    number of microticks (840ns units) required for REP LODSD of
                  entire 4K page

Format of 386MAX memory info [array]:
Offset  Size    Description     (Table 01483)
 00h    DWORD   linear start address
 04h    DWORD   size in bytes
 08h    WORD    XMS handle (if next byte = 04h)
                ??? (if next byte = 05h)
                ??? (if next byte = 06h)
                ??? (if next byte = 13h)
                ??? (if next byte = 14h)
                ??? (if next byte = 15h)
                ??? (if next byte = 23h)
                ??? (if next byte = 24h)
                ??? (if next byte = 26h)
                else unused
 0Ah    BYTE    type
                00h = ???, 01h = VDISK,
                02h = INT 15h extended memory, 03h = ??? extended,
                04h = XMS handle's memory, 05h = ???, 06h = ???, 07h = ???,
                08h = ???, 09h = ???, 0Ah = ???, 0Bh = ???,
                11h = ???, 12h = ???, 14h = ???, 15h = ???,
                19h = ???, 1Ah = ???, 1Bh = ???,
                1Ch = ???, 1Dh = ???, 1Eh = ???, 1Fh = ???,
                20h = ???, 21h = ???, 23h = ???, 24h = ???,
                26h = ???
 0Bh    BYTE    ??? (00h for types 00h-03h, 07h-0Bh, 19h-21h;
                     80h for types 04h/13h-15h/23h-26h;
                        ??? for type 05h)
--------V-214402-----------------------------
INT 21 - PGS1600.DEV - IOCTL - GET CONFIGURATION INFO
        AX = 4402h
        BX = file handle for device "PGS1600$"
        CX = 0018h (size of buffer)
        DS:DX -> configuration buffer (see #01484)
Return: CF clear if successful
            buffer filled
            AX = number of bytes actually copied
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: PGS1600.DEV is a device driver for the Cornerstone Technology PG1600
          display adapter, which provides a 1600x1200 monochrome display as
          well as one of two emulations, MDA or CGA.
SeeAlso: AX=4403h"PGS1600"

Format of PGS1600.DEV configuration information:
Offset  Size    Description     (Table 01484)
 00h    WORD    version (high byte = major, low byte = minor)
 02h    WORD    board initialisation mode
 04h    WORD    board I/O address
                03D0h CGA emulation
                03B0h MDA emulation
                0390h no emulation
                0350h no emulation, alternate
 06h    WORD    emulation buffer segment
                B800h   CGA emulation
                B000h   MDA emulation
                0000h   no emulation
 08h    WORD    PG1600 graphics buffer segment
 0Ah    WORD    number of bytes between consecutive graphic rows
 0Ch    WORD    horizontal pixel size
 0Eh    WORD    vertical pixel size
 10h    WORD    horizontal dots per inch
 12h    WORD    vertical dots per inch
 14h    WORD    graphics buffer bits per pixel
 16h    WORD    monitor bits per pixel
--------N-214402-----------------------------
INT 21 - PC/TCP IPCUST.SYS - RESET CONFIGURATION DATA READ POINTER
        AX = 4402h
        BX = file handle referencing device "$IPCUST"
        CX, DS:DX ignored
Return: CF clear if successful
            AX destroyed
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Notes:  there are a total of 378h bytes of configuration data for IPCUST.SYS
          version 2.05.  If less than the entire data is read or written,
          the next read/write continues where the previous one ended; this
          call and AX=4403h both reset the location at which the next
          operation starts to zero
        v2.1+ uses a new configuration method, but allows the installation
          of IPCUST.SYS for backward compatibility with other software which
          must read the PC/TCP configuration
SeeAlso: AH=3Fh"IPCUST",AH=40h"IPCUST",AX=4403h"IPCUST"
--------N-214402-----------------------------
INT 21 - WORKGRP.SYS - GET API ENTRY POINT
        AX = 4402h
        BX = file handle for device "NET$HLP$"
        CX = 0008h
        DS:DX -> buffer for entry point record (see #01485)
Return: CF clear if successful
            AX = number of bytes actually read
        CF set on error
            AX = error code
Program: WORKGRP.SYS is the portion of Microsoft's Workgroup Connection which
          permits communication with PCs running Windows for Workgroups or
          LAN Manager
SeeAlso: AH=3Fh"WORKGRP.SYS"

Format of WORKGRP.SYS entry point record:
Offset  Size    Description     (Table 01485)
 00h    WORD    3633h  \ signature???
 02h    WORD    EF6Fh  /
 04h    DWORD   address of entry point (see #01486)
Note:   first four bytes of buffer must be 6Fh E9h 33h 36h on entry when using
          IOCTL rather than READ to get the entry point record

(Table 01486)
Call WORKGRP entry point with:
        STACK:  WORD    function number (0000h-0009h)
Return: STACK unchanged
SeeAlso: #01487,#01488,#01489,#01490,#01491,#01492,#01493,#01494

(Table 01487)
Call WORKGRP function 00h with:
        STACK:  WORD    0000h (function "get ???")
Return: DX:AX -> data table

(Table 01488)
Call WORKGRP function 01h with:
        STACK:  WORD    0001h (function "hook ???")
Return: STACK:  DWORD   pointer to ???
                WORD    0001h (function number)

(Table 01489)
Call WORKGRP function 02h with:
        STACK:  WORD    0002h (function "unhook ???")
        ???
Return: ???

(Table 01490)
Call WORKGRP function 03h with:
        STACK:  WORD    0003h (function "reenable printer port")
                WORD    LPT port number
Return: ???

(Table 01491)
Call WORKGRP function 04h with:
        STACK:  WORD    0004h (function "disable printer port")
                WORD    LPT port number
Return: ???

(Table 01492)
Call WORKGRP function 05h with:
        STACK:  WORD    0005h (function "???")
                ???
Return: ???

(Table 01493)
Call WORKGRP function 06h with:
        STACK:  WORD    0006h (function "???")
Return: STACK unchanged
        AX = 0000h
        DX = 0000h

(Table 01494)
Call WORKGRP functions 07h-09h with:
        STACK:  WORD    0007h-0009h (NOP functions)
Return: STACK unchanged
        AX = 0001h
        DX = 0000h
--------N-214402-----------------------------
INT 21 - 10NET v5.0 - 10BEUI.DOS - API
        AX = 4402h
        BX = file handle referencing device "10BEUI$"
        DS:DX -> parameter record (see #01495)
        CX ignored
Return: CF clear if successful
            AX destroyed
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
SeeAlso: AX=4402h"10MEMMGR",INT 6F/AH=00h"10NET"

Format of 10NET 10BEUI.DOS parameter record:
Offset  Size    Description     (Table 01495)
 00h    WORD    000Ah (function number???)
 02h    WORD    ???
 04h    DWORD   pointer to buffer for ???
 08h  4 BYTEs   ???
 0Ch    WORD    transfer size
--------N-214402-----------------------------
INT 21 - 10NET v5.0 - 10MEMMGR.SYS - API
        AX = 4402h
        BX = file handle referencing device "MEMMGR0$"
        DS:DX -> 6-byte buffer for interface info (see #01496)
        CX ignored
Return: CF clear if successful
            AX destroyed
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
SeeAlso: AX=4402h"10BEUI",INT 6F/AH=00h"10NET"

Format of 10NET 10MEMMGR.SYS interface info:
Offset  Size    Description     (Table 01496)
 00h    DWORD   address of entry point (see #01497)
 04h    WORD    version (0500h for v5.00)

(Table 01497)
Call 10NET 10MEMMGR.SYS entry point with:
        AL = 01h ???
            BX = ???
            Return: CF clear if successful
                    CF set on error
                        AX = error code
        AL = 02h ???
            ???
        AL = 03h ???
            ???
        AL = 04h set/restore memory allocation strategy
            BX = subfunction
                0000h set strategy
                0001h restore strategy
            Return: CF clear if successful
                    CF set on error (if function disabled)
                    various registers destroyed
        AL = other
            Return: CF set
                    AX = 0000h
                    BL = 01h
--------V-214402-----------------------------
INT 21 - Compaq AG1024.SYS - RGDI - GET DRIVER LOCATION
        AX = 4402h
        BX = file handle for device "$$$$RGDI"
        CX = 0006h (size of returned data)
        DS:DX -> location record (see #01498)
Return: CF clear if successful
            buffer filled
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: AG1024.SYS is a device driver for the Advanced Graphics 1024 adapter
SeeAlso: AX=4403h"RGDI"

Format of Compaq AG1024.SYS location record:
Offset  Size    Description     (Table 01498)
 00h    WORD    signature 55AAh
 02h    WORD    segment of ???
 04h    WORD    segment of device driver's code
--------N-214402-----------------------------
INT 21 - FTPSOFT.DOS v3.1 - GET ???
        AX = 4402h
        BX = file handle for device "FTPSOFT$"
        CX = size of buffer
        DS:DX -> buffer for data (see #01499)
Return: CF clear if successful
            buffer filled
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: FTPSOFT.DOS is a device driver for Protocol Manager support from
           FTP Software, Inc.
SeeAlso: AH=3Fh"PC/TCP",AX=4402h"NDIS"

Format of FTPSOFT.DOS data:
Offset  Size    Description     (Table 01499)
 00h    WORD    (call) BA98h (if different, no data returned)
 02h    DWORD   -> NDIS common characteristics table
                  (see #01435 at AX=4402h"NDIS")
 06h    DWORD   (call) -> new dispatch table (see #01437 at AX=4402h"NDIS")
 0Ah    DWORD   -> 28-byte buffer for ??? data
 0Eh    DWORD   ???
 12h    DWORD   -> FAR function to reset dispatch jump table to defaults
 16h    BYTE    ???
Note:   the addresses in the new dispatch table are copied into an internal
          jump table which may be reset by calling the function pointed at by
          offset 12h
--------n-214402-----------------------------
INT 21 U - PenDOS PENDEV.SYS - GET ENTRY POINTS
        AX = 4402h
        BX = file handle for device "$$PENDOS" or "$$PD_REG"
        CX = size of buffer (4 for $$PENDOS and a 4,8,12, or 16 for $$PD_REG)
        DS:DX -> buffer for entry point record (see #01500)
Return: CF clear if successful
            buffer filled
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: A limited version of PenDOS by Communication Intelligence Corporation,
          which provides pen capability to keyboard-based programs, is bundled
          with IBM DOS 6.1
SeeAlso: AX=4403h"PENDEV.SYS"

Format of PENDEV.SYS entry point record:
Offset  Size    Description     (Table 01500)
 00h    DWORD   -> array of jumps
 04h    WORD    offset of function to retrieve entry point (see #01501)
 06h  2 BYTEs   signature "Pe"
 08h    WORD    offset of function to set entry point (see #01502)
 0Ah  2 BYTEs   signature "nD"
 0Ch    WORD    offset of function to clear entry point (see #01503)
 0Eh    WORD    signature "OS"

(Table 01501)
Call PENDEV.SYS function to retrieve entry point with:
        AX = index of entry point (0-9)
Return: CF clear if successful
            DX:AX -> desired entry point
        CF set on error (AX out of range)

(Table 01502)
Call PENDEV.SYS function to set entry point with:
        AX = index of entry point (0-9)
        DX:SI -> new handler
Return: CF clear if successful
        CF set on error (AX out of range)

(Table 01503)
Call PENDEV.SYS function to clear entry point with:
        AX = index of entry point (0-9)
Return: CF clear if successful
        CF set on error (AX out of range)
Note:   resets the jump at the specified entry point to its default target,
          which simply returns
--------N-214402-----------------------------
INT 21 U - LAN Manager - TCPDRV.DOS - API
        AX = 4402h
        BX = file handle referencing device "TCPDRV$"
        CX = 0019h
        DS:DX -> buffer containing request block (see #01504)
Return: CF clear if successful
            buffer filled
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: TCPDRV.DOS is the low-level device driver supporting LAN Manager's
          TCP/IP protocol stack

Format of TCPDRV.DOS request block:
Offset  Size    Description     (Table 01504)
 00h    BYTE    (call) function number
                00h initialize ???
                06h get ???
                07h get ???
 01h    BYTE    (call) 00h
                (ret) error code if error, unchanged if successful
 02h    WORD    signature 4354h ('CT')
---function 00h---
 04h    DWORD   (call) pointer to ??? FAR function
                function is called with ES:BX -> device driver request used to
                  invoke this function
 08h  4 BYTEs   ???
 0Ch    DWORD   (call) pointer to ??? record, WORD at offset 22h is read
 10h    DWORD   (ret) -> ??? buffer if 0000h:0000h on call
---function 06h---
 04h  4 BYTEs   ???
 08h    DWORD   (ret) pointer to ???
---function 07h---
 04h    DWORD   (ret) pointer to ??? record
--------y-214402-----------------------------
INT 21 U - PC Tools 9 CPRLOW.EXE - GET CODE AND DATA ADDRESSES
        AX = 4402h
        BX = file handle referencing device "RECLOWLD"
        DS:DX -> buffer for address list (see #01505)
        CX ignored
Return: CF clear if successful
            buffer filled
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)

Format of CPRLOW address list:
Offset  Size    Description     (Table 01505)
 00h    WORD    segment of CPRLOW code
 02h    WORD    offset in code segment of ??? entry point
                (switches into protected mode)
 04h    WORD    offset in code segment of jump array (see #01506)
 06h    WORD    segment of copy of interrupt vector table at CPRLOW load time
Note:   neither the entry point nor the jump array is valid until after a
          CPR /LOAD, because CPR.EXE installs the code into CPRLOW at runtime.

Format of CPRLOW jump array:
Offset  Size    Description     (Table 01506)
 00h  3 BYTEs   initialize CPRLOW interrupt hooks
 03h  3 BYTEs   reset timers and enable CPR (hotkey enable)
 06h  3 BYTEs   disable CPR (hotkey disable)
 09h  3 BYTEs   clear ??? flag, hotkey disable, and ???
 0Ch  3 BYTEs   initialize delay loop counter (destroys AX,BX,CX,DX)
 0Fh  3 BYTEs   disable CPR completely (commandline /DISABLE)
 12h  3 BYTEs   enable ??? if CPR enabled by both cmdline and hotkey
 15h  3 BYTEs   enable CPR (commandline /ENABLE)
--------s-214402-----------------------------
INT 21 U - Creative Technology CTMMSYS.SYS v1.00.01 - API
        AX = 4402h
        BX = file handle for device "CTMMSYS$"
        CX = 0004h (size of data)
        DS:DX -> buffer for entry point (see #01507)
Return: CF clear if successful
            buffer updated
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: CTMMSYS.SYS is the Creative DOS Multimedia Architecture Integration
          driver
SeeAlso: AX=4402h"CTSB2",INT 80/BX=0000h"SBFM"

Format of CTMMSYS.SYS entry point record:
Offset  Size    Description     (Table 01507)
 00h    DWORD   (call) signature 4D6D7443h (ASCII "CtmM")
                (ret) pointer to CTMMSYS entry point (see #01508)
SeeAlso: #01509

(Table 01508)
Call CTMMSYS.SYS entry point with:
        AX = ???
        STACK:  WORD    ???
                WORD    ???
                WORD    ??? (0001h,0002h,0005h,0006h)
                WORD    ???
                DWORD   -> ???
                WORD    ???
                WORD    ???
Return: DX:AX = ??? or error code
                0000h:000Bh invalid value for ???
                0000h:000Fh API call already in progress
SeeAlso: #01507
--------s-214402-----------------------------
INT 21 U - Creative Technology CTSB2.SYS v1.01.01 - API
        AX = 4402h
        BX = file handle for device "CTSOUND0"
        CX = 0004h (size of data)
        DS:DX -> buffer for entry point (see #01509)
Return: CF clear if successful
            buffer updated
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: CTMMSYS.SYS is the Creative DOS Multimedia Architecture Integration
          driver
SeeAlso: AX=4402h"CTMMSYS",INT 80/BX=0000h"SBFM"

Format of CTSB2.SYS entry point record:
Offset  Size    Description     (Table 01509)
 00h    DWORD   (call) signature 4D6D7443h (ASCII "CtmM")
                (ret) pointer to CTSB2 entry point (see #01510)
SeeAlso: #01507

(Table 01510)
Call CTSB2.SYS entry point with:
        AX = ???
        STACK:  DWORD   -> ???
                WORD    function number
                        (0100h,0200h,0300h,0400h,0500h,0600h,0701h)
                DWORD   -> ???
                WORD    ???
                WORD    ???
Return: DX:AX = ??? or error code
                0000h:0004h invalid subfunction???
                0000h:000Bh invalid value for ???
                0000h:000Fh API call already in progress
SeeAlso: #01509
--------m-214402-----------------------------
INT 21 U - Novell DOS 7 EMM386.EXE - GET STATE RECORD???
        AX = 4402h
        BX = file handle for device "EMMXXXX0"
        CX = 003Eh (size of state record)
        DS:DX -> buffer for state record (see #01511)
Return: CF clear if successful
            buffer filled (see #03603 at INT 67/AH=3Fh)
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)

Format of Novell DOS 7 EMM386.EXE state record:
Offset  Size    Description     (Table 01511)
 00h    WORD    signature EDC0h
 02h 60 BYTEs   ???
--------m-214402SF00-------------------------
INT 21 U - Memory Managers - GET API ENTRY POINT
        AX = 4402h subfn 00h
        BX = file handle for device "EMMXXXX0"
        CX = 0006h (size of buffer in bytes)
        DS:DX -> buffer for API entry point record (see #01512)
                first byte must be 00h on entry
Return: CF clear if successful
            buffer filled (see #03603 at INT 67/AH=3Fh)
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Notes:  this function is supported by Microsoft EMM386.EXE v4.45+ and
          CEMM v5.10+, and is intended for use by MS Windows as it starts up
        if no other program has hooked INT 67, an alternate installation
          check for CEMM is testing for the string
          "COMPAQ EXPANDED MEMORY MANAGER 386" at offset 14h in the INT 67
          handler's segment; if present, the word at offset 12h contains the
          offset of the API entry point
SeeAlso: AX=4402h/SF=01h,AX=4402h/SF=02h,AX=4402h"EMM386",INT 67/AH=3Fh

Format of memory manager API entry point record:
Offset  Size    Description     (Table 01512)
 00h    WORD    ??? (0022h for CEMM 5.11, 0025h for MS EMM386 v4.45)
 02h    DWORD   manager's private API entry point
                (see #01513,#03666 at INT 67/AX=FFA5h)

(Table 01513)
Call CEMM v5.10+ entry point with:
        AH = 00h get memory manager's state
            Return: AH = state
                        bit 0: turned OFF
                        bit 1: AUTO mode enabled
        AH = 01h set memory manager's state
            AL = new state (00h ON, 01h OFF, 02h AUTO)
            Return: CF clear if successful
                    CF set on error
        AH = 02h Weitek coprocessor support
            AL = subfunction
                00h get Weitek support state
                    Return: AL = status
                                bit 0: Weitek coprocessor is present
                                bit 1: Weitek support is enabled
                01h turn on Weitek support
                02h turn off Weitek support
            Return: CF clear if successful
                    CF set on error
                        AH = error code (01h invalid subfunc, 02h no Weitek)
        AH = 05h get statistics
            ???
        AH > 06h
            Return: CF set
                    AH = 01h (invalid function)
Notes:  AH=03h,04h,06h are NOPs which return CF clear, presumably for backwards
          compatibility with earlier versions of CEMM
        in v5.11, AH=05h merely prints an error message (using INT 21/AH=09h)
          stating that a different version of CEMM is installed and it is
          therefore not possible to display the statistics
--------m-214402SF01-------------------------
INT 21 U - Memory Managers - GET EMM IMPORT STRUCTURE ADDRESS
        AX = 4402h subfn 01h
        BX = file handle for device "EMMXXXX0"
        CX = 0006h (size of buffer in bytes)
        DS:DX -> buffer for EMM import structure record (see #01514)
                first byte must be 01h on entry
Return: CF clear if successful
            buffer filled (see also #03603 at INT 67/AH=3Fh)
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Notes:  this function is supported by Microsoft EMM386.EXE v4.45+,
          QEMM-386 v6+, and CEMM v5.10+, and is intended for use by MS Windows
          as it starts up
        for QEMM-386, this call always returns an error if Windows3 support
          has been disabled with the NW3 switch
SeeAlso: AX=4402h/SF=00h,AX=4402h"EMM386",INT 2F/AX=D201h/BX=5145h
SeeAlso: INT 67/AH=3Fh

Format of EMM import structure record:
Offset  Size    Description     (Table 01514)
 00h    DWORD   physical address of EMM import structure (see #01515)
 04h    BYTE    EMM import structure major version
 05h    BYTE    EMM import structure minor version
Note:   vession 1.00 contains only EMS information (Windows 3.0+)
        version 1.10 contains UMB/XMS/HMA/EMS information (Windows 3.1)
        version 1.11 is version 1.10 plus memory manager maker/product name
SeeAlso: #03643

Format of Global EMM Import record:
Offset  Size    Description     (Table 01515)
 00h    BYTE    bit flags
                bit 2: ???
                bit 3: free EMM386 virtual HMA only if hma_page_table_paddr!=0
                bit 4: no UMB???
 01h    BYTE    reserved (0)
 02h    WORD    size of structure in bytes
 04h    WORD    structure version
 06h    DWORD   reserved
 0Ah 384 BYTEs  64 EMS frame status records (see #01516), one per 16K of
                  real-mode 1M address space
18Ah    BYTE    ??? (must be at least 3*number_of_EMS_frames+4)
18Bh    BYTE    number of UMB frame descriptors following
18Ch 4N DWORDs  UMB frame descriptors
                each is 4 DWORDs giving physical page numbers for the four
                  4K pages of a 16K EMS frame (00000000h if non-UMB page)
var     BYTE    number of EMS handle info records following
    16N BYTEs   EMS handle info records (see #01518)
---version 1.10+ ---
        DWORD   realmode INT 67 vector (used by Windows to set breakpoints)
        DWORD   physical address of HMA page table values
        BYTE    number of free page entries following
     2N DWORDs  free page entries
                each is:
                    DWORD       physical page number
                    DWORD       number of consecutive physical pages
        BYTE    number of XMS handle info records following
                00h if memory manager does not emulate XMS or has real mode
                  XMS code which can execute in the Windows environment
    12N BYTEs   XMS handle info records (see #01519)
        BYTE    number of free UMB info records following
     2N WORDs   free UMB info records
                each is:
                    WORD        real mode start segment
                    WORD        size in paragraphs
---version 1.11---
     20 BYTEs   blank-padded maker name
     20 BYTEs   blank-padded product name

Format of EMS frame status record:
Offset  Size    Description     (Table 01516)
 00h    BYTE    frame type (see #01517)
 01h    BYTE    owner handle (00h/FFh = none) from frame including UMB
                index to UMB frame descriptors
 02h    WORD    logical page for frame, 7FFFh if none, FFFFh if non-EMS frame
 04h    BYTE    EMS physical page number (FFh for non-EMS = don't care???)
 05h    BYTE    flags for non-EMS frames (00h for EMS frame)
                bits 0,1 for first 4K, bits 2,3 for second 4K, etc:
                  10: direct mapping (linear address = physical address)
                  01: UMB mapping

Bitfields for EMS frame type:
Bit(s)  Description     (Table 01517)
 0      EMS frame
 1      (if EMS frame) in standard 64K page frame
 2      first 4K of frame is UMB
 3      second 4K of frame is UMB
 4      third 4K of frame is UMB
 5      last 4K of frame is UMB

Format of EMS handle info record:
Offset  Size    Description     (Table 01518)
 00h    BYTE    handle number (00h = system handle)
 01h    BYTE    flags
                bit 0: normal handle rather than system handle
                bit 2: ??? (set by some EMS managers)
 02h  8 BYTEs   EMS handle's name
 0Ah    WORD    number of 16K pages for handle
 0Ch    DWORD   physical address of page table entries forming page map
Note:   all values should be zero for the system handle if no large frame
          support is present

Format of XMS handle info record:
Offset  Size    Description     (Table 01519)
 00h    WORD    handle
 02h    WORD    flags
                bit 0: handle usable by Windows
                        (already in use when Windows started if clear)
                bit 1: reserved (0)
 04h    DWORD   size in KB (may be zero, used only if flags bit 0 set)
 08h    DWORD   physical address (only if flags bit 0 set)
--------m-214402SF02-------------------------
INT 21 U - Memory Managers - GET MEMORY MANAGER VERSION
        AX = 4402h subfn 02h
        BX = file handle for device "EMMXXXX0"
        CX = 0002h (size of buffer in bytes)
        DS:DX -> buffer for memory manager version (see #01520)
                first byte must be 02h on entry
Return: CF clear if successful
            buffer filled
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Note:   this function is supported by Microsoft EMM386.EXE v4.45+ and
          CEMM v5.10+, and is intended for use by MS Windows as it starts up
SeeAlso: AX=4402h/SF=00h,AX=4402h"EMM386",INT 67/AH=3Fh

Format of memory manager version:
Offset  Size    Description     (Table 01520)
 00h    BYTE    major version
 01h    BYTE    minor version (binary)
--------m-214402-----------------------------
INT 21 U - Microsoft EMM386.EXE v4.45 - GET MEMORY MANAGER INFORMATION
        AX = 4402h
        BX = file handle for device "EMMXXXX0"
        CX = size of buffer in bytes (varies, see #01521)
        DS:DX -> buffer for returned data (see #01521)
                first byte must be set on entry to indicate desired data
Return: CF clear if successful
            buffer filled
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Notes:  an error is returned if the number of bytes to be read does not match
          the number of bytes returned for the specified data item
        this function is part of the interface which allows MS Windows to
          cooperate with memory managers
SeeAlso: AX=4402h/SF=00h,AX=4402h/SF=01h,AX=4402h/SF=02h,INT 67/AX=FFA5h

Format of EMM386.EXE data buffer:
Offset  Size    Description     (Table 01521)
 00h    BYTE    (call) function
                03h get ???
                04h get ???
---function 03h---
 00h    WORD    ???
 02h    WORD    ???
---function 04h---
 00h    WORD    segment of UMB containing EMM386 code/data
 02h    WORD    number of paragraphs of EMM386 code/data in UMB
 04h    WORD    ???
----------214402-----------------------------
INT 21 U - IFSHLP.SYS - GET ENTRY POINT
        AX = 4402h
        BX = file handle for device "IFS$HLP$"
        CX = 0008h (size of buffer in bytes)
        DS:DX -> buffer for entry point record (see #01415 at AH=3Fh"IFSHLP")
Return: CF clear if successful
            buffer filled
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
SeeAlso: AH=3Fh"IFSHLP"
--------D-214403-----------------------------
INT 21 - DOS 2+ - IOCTL - WRITE TO CHARACTER DEVICE CONTROL CHANNEL
        AX = 4403h
        BX = file handle referencing character device
        CX = number of bytes to write
        DS:DX -> data to write
Return: CF clear if successful
            AX = number of bytes actually written
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Notes:  format of data is driver-specific
          (also see separate entries below for some specific cases)
        if the file handle refers to "4DOSSTAK", the 4DOS (v2.x-3.03)
          KEYSTACK.SYS driver will push the specified characters on the
          keyboard stack; similarly for "NDOSSTAK", the NDOS KEYSTACK.SYS
          driver will push the characters onto the keyboard stack
        this function was not supported by Digital Research's DOS-Plus
SeeAlso: AX=4400h,AX=4402h"DOS 2+",AX=4405h"DOS",INT 2F/AX=122Bh
SeeAlso: INT 2F/AX=D44Dh,INT 2F/AX=D44Fh
--------c-214403-----------------------------
INT 21 - SMARTDRV.SYS v3.x only - IOCTL - CACHE CONTROL
        AX = 4403h
        BX = handle for device "SMARTAAR"
        CX = number of bytes to write
        DS:DX -> SMARTDRV control block (see #01523)
Return: CF clear if successful
            AX = number of bytes actually written
                0000h if control block too small for given command
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Note:   NCache2 (from the Norton Utilities v8.0) attempts to support this
          interface, but does not do so correctly, often hanging the system;
          one should use the SmartDrive v4.x or NCache private interfaces
          (see INT 2F/AX=4A10h/BX=0000h,INT 2F/AX=FE00h/DI=4E55h)
SeeAlso: AX=4402h"SMARTDRV",INT 2F/AX=4A10h/BX=0000h

(Table 01522)
Values for SMARTDRV function code:
 00h    flush cache
 01h    flush and discard cache
 02h    disable caching (flushes and discards cache first)
 03h    enable caching
 04h    control write caching
 05h    set flushing tick count
 06h    lock cache contents
 07h    unlock cache contents
 08h    set flush-on-reboot flag
 09h    unused
 0Ah    control full-track caching
 0Bh    reduce cache size
 0Ch    increase cache size
 0Dh    set INT 13 chain address

Format of SMARTDRV control block:
Offset  Size    Description     (Table 01523)
 00h    BYTE    function code (see #01522)
---functions 00h-03h,06h,07h---
 no additional fields
---function 04h---
 01h    BYTE    write caching control action
                00h turn off write-through
                01h turn on write-through
                02h turn off write buffering (also flushes cache)
                03h turn on write buffering (also flushes cache)
---function 05h---
 01h    WORD    number of timer ticks between cache flushes
---function 08h---
 01h    BYTE    new flush-on-reboot flag (00h off, 01h on)
---function 0Ah---
 01h    BYTE    full-track writes are
                00h not cached
                01h cached
---functions 0Bh,0Ch---
 01h    WORD    number of 16K pages by which to increase/reduce cache size
---function 0Dh---
 01h    DWORD   new address to which to chain on INT 13
Note:   the previous address is not preserved
--------d-214403-----------------------------
INT 21 - CD-ROM device driver - IOCTL OUTPUT
        AX = 4403h
        BX = file handle referencing character device for CD-ROM driver
        CX = number of bytes to write
        DS:DX -> control block (see #01524)
Return: CF clear if successful
            AX = number of bytes actually written
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Notes:  some device drivers support several subunits (that is more than one
          drive) but it is not possible to distinguish between them with this
          function; use INT 2F/AX=1510h or INT 2F/AX=0802h instead
        under Windows95, the "mscd$$$$" device cannot be opened so you cannot
          obtain the handle required by this function: use INT 2F/AX=1510h
          or INT 2F/AX=0802h instead
SeeAlso: AX=4402h"CD-ROM",INT 2F/AX=0802h,INT 2F/AX=1510h

Format of CR-ROM control block:
Offset  Size    Description     (Table 01524)
 00h    BYTE    function code
                00h eject disk
                01h lock/unlock door
                02h reset drive
                03h control audio channel
                04h write device control string
                05h close tray
---functions 00h,02h,05h---
 no further fields
---function 01h---
 01h    BYTE    lock function
                00h unlock door
                01h lock door
---function 03h---
 01h    BYTE    input channel (0-3) for output channel 0
 02h    BYTE    volume for output channel 0
 03h    BYTE    input channel (0-3) for output channel 1
 04h    BYTE    volume for output channel 1
 05h    BYTE    input channel (0-3) for output channel 2
 06h    BYTE    volume for output channel 2
 07h    BYTE    input channel (0-3) for output channel 3
 08h    BYTE    volume for output channel 3
Note:   output channels 0 and 1 are left and right, 2 and 3 are left prime and
          right prime; a volume of 00h is off
---function 04h---
 01h  N BYTEs   bytes to send directly to the CD-ROM drive without
                  interpretation
--------D-214403-----------------------------
INT 21 U - MS-DOS 7.0+ - CONFIG$ device - SET??? CONFIGURATION INFORMATION
        AX = 4403h
        BX = file handle for character device "CONFIG$"
        CX = number of bytes to write
        DS:DX -> buffer containing ???
Return: CF clear if successful
            AX = number of bytes actually written
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Note:   IOCTL Output to CONFIG$ is only available while IO.SYS is booting
          the system; once CONFIG.SYS has been processed, this call always
          succeeds, ignoring any input
SeeAlso: AX=4403h"CONFIG$"
--------d-214403-----------------------------
INT 21 - Brian Antoine Seagate ST-01 SCSI.SYS - IOCTL - EXECUTE COMMANDS
        AX = 4403h
        BX = handle for device "SCSITAPE"
        CX = number of bytes to write
        DS:DX -> SCSITAPE control block (see #01525)
Return: CF clear if successful
            AX = number of bytes actually written
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
SeeAlso: AX=4405h"ST-01",INT 78/AH=10h

Format of SCSITAPE control block:
Offset  Size    Description     (Table 01525)
 00h    WORD    command type
                'F' Format (argument 1 = interleave, argument 2 = format type)
                'E' Erase
                'R' Rewind
                'L' Load
                'N' No Load
                'S' Space (argument 1 = count, argument 2 = type)
                'M' File Mark (argument 1 = count)
                'A' Reassign
 02h    WORD    argument 1
 04h    WORD    argument 2
 06h    WORD    segment of command buffer
 08h    WORD    offset of command buffer
 0Ah    WORD    length of command buffer
--------E-214403-----------------------------
INT 21 U - AI Architects - OS/x86??? - API
        AX = 4403h
        BX = handle for device "AIA_OS"
        CX = number of bytes to write (ignored)
        DS:DX -> 12-byte buffer (see #01526), first byte is command:
                  81h installation check
                  82h get API entry point
                  84h uninstall
Return: CF clear if successful
            AX = number of bytes actually written
            DS:DX buffer filled
        CF set on error
            AX = error code (01h,05h,06h,0Ch,0Dh) (see #01680 at AH=59h)
Notes:  these functions are only available if the DOS extender was loaded as a
          device driver in CONFIG.SYS
        called by TKERNEL (a licensed version of AI Architects/Ergo OS/x86)
SeeAlso: INT 2F/AX=FBA1h/BX=0081h,INT 2F/AX=FBA1h/BX=0082h
Index:  installation check;OS/x86|entry point;OS/x86|uninstall;OS/x86

Format of buffer on return:
Offset  Size    Description     (Table 01526)
 00h  4 BYTEs   signature "IABH"
---if function 81h---
 (no additional fields)
---if function 82h---
 04h    DWORD   pointer to API entry point (see INT 2F/AX=FBA1h/BX=0082h)
---if function 84h---
 04h    WORD    success indicator
 06h    WORD    segment of ???
 08h    WORD    segment of ??? memory block to free if nonzero
 0Ah    WORD    segment of ??? memory block to free if nonzero
--------V-214403-----------------------------
INT 21 - PGS1600.DEV - IOCTL - SET CONFIGURATION???
        AX = 4403h
        BX = file handle for device "PGS1600$"
        CX = 0018h (size of buffer)
        DS:DX -> configuration buffer (see #01484 at AX=4402h"PGS1600")
Return: CF clear if successful
            AX = number of bytes actually written
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: PGS1600.DEV is a device driver for the Cornerstone Technology PG1600
          display adapter, which provides a 1600x1200 monochrome display as
          well as one of two emulations, MDA or CGA.
SeeAlso: AX=4402h"PGS1600"
--------N-214403-----------------------------
INT 21 - PC/TCP IPCUST.SYS - RESET CONFIGURATION DATA READ POINTER
        AX = 4403h
        BX = file handle referencing device "$IPCUST"
        CX, DS:DX ignored
Return: CF clear if successful
            AX destroyed
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Notes:  there are a total of 378h bytes of configuration data for IPCUST.SYS
          version 2.05.  If less than the entire data is read or written,
          the next read/write continues where the previous one ended; this
          call and AX=4402h both reset the location at which the next
          operation starts to zero
        v2.1+ uses a new configuration method, but allows the installation
          of IPCUST.SYS for backward compatibility with other software which
          must read the PC/TCP configuration
SeeAlso: AH=3Fh"IPCUST",AH=40h"IPCUST",AX=4402h"IPCUST"
--------V-214403-----------------------------
INT 21 - Compaq AG1024.SYS - CPQ_MGES - IOCTL OUTPUT
        AX = 4403h
        BX = file handle referencing device "CPQ_MGES"
        DS:DX -> request packet (see #01527)
        CX ignored
Return: CF clear if successful
            AX destroyed
            data buffer filled (if applicable)
            first word of request packet set to number of bytes of data
              available (amount returned is smaller of this and requested
              amount)
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: AG1024.SYS is a device driver for the Advanced Graphics 1024 adapter
SeeAlso: AX=4403h"RGDI"

Format of Compaq AG1024.SYS request packet:
Offset  Size    Description     (Table 01527)
 00h    WORD    function
                0000h get ??? (26h bytes)
                0001h get ??? (36h bytes)
                0002h set ??? (same as returned by function 0001h)
                0003h get ??? (6 bytes)
                0004h get ???
                0005h get ???
                0006h get ??? (10h bytes)
                0007h set ??? (same as returned by function 0006h)
---functions 00h-03h,06h,07h---
 02h    WORD    size of data buffer
 04h    DWORD   -> buffer for function's data
 ---functions 04h,05h---
 02h    WORD    ???
 04h    WORD    size of data buffer
 06h    DWORD   -> buffer to receive data
--------V-214403-----------------------------
INT 21 - Compaq AG1024.SYS - RGDI - IOCTL OUTPUT
        AX = 4403h
        BX = file handle referencing device "$$$$RGDI"
        DS:DX -> request packet (see #01528)
        CX ignored
Return: CF clear if successful
            AX destroyed
            data buffer filled (if applicable)
            first word of request packet set to number of bytes of data
              available (amount returned is smaller of this and requested
              amount)
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: AG1024.SYS is a device driver for the Advanced Graphics 1024 adapter
SeeAlso: AX=4402h"RGDI",AX=4403h"CPQ_MGES"

Format of Compaq AG1024.SYS request packet:
Offset  Size    Description     (Table 01528)
 00h    WORD    function
                0000h get entry points
                0001h get ???
 02h    DWORD   address of buffer for returned data
--------m-214403SF01-------------------------
INT 21 U - Qualitas 386MAX v6.01+ - TURN 386MAX OFF
        AX = 4403h subfn 01h
        BX = handle for device "386MAX$$"
        DS:DX -> BYTE 01h
        CX ignored
Return: DS:DX -> BYTE status (00h = successful)
        CF clear if successful
            AX destroyed
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Note:   this function will fail if any EMS or UMBs are in use
SeeAlso: AX=4403h/SF=02h,AX=4403h/SF=03h,AX=4403h/SF=05h
--------m-214403SF02-------------------------
INT 21 U - Qualitas 386MAX v6.01+ - TURN 386MAX ON
        AX = 4403h subfn 02h
        BX = handle for device "386MAX$$"
        DS:DX -> BYTE 02h
        CX ignored
Return: DS:DX -> BYTE status (00h = successful)
        CF clear if successful
            AX destroyed
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
SeeAlso: AX=4403h/SF=01h,AX=4403h/SF=03h,AX=4403h/SF=05h
--------m-214403SF03-------------------------
INT 21 U - Qualitas 386MAX v6.01+ - SET STATE
        AX = 4403h subfn 03h
        BX = handle for device "386MAX$$"
        CX = number of bytes to copy (up to size of state buffer)
        DS:DX -> BYTE 03h followed by state buffer
                  (see #01467 at AX=4402h"386MAX")
Return: CF clear if successful
            AX = number of bytes actually written
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Note:   the first byte of the buffer must be either 01h, 02h, or 03h
          (specifying the version of the state record) and the buffer must
          contain CX bytes AFTER the initial byte
SeeAlso: AX=4402h"386MAX"
--------m-214403SF05-------------------------
INT 21 U - Qualitas 386MAX v7.00+ - LIMIT AUTOMATIC ACTIVATION TO STD EMS CALLS
        AX = 4403h subfn 05h
        BX = handle for device "386MAX$$"
        DS:DX -> BYTE 05h
        CX ignored
Return: CF clear if successful
            AX destroyed
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Desc:   specifies that 386MAX will only shift from AUTO to ON mode on standard
          EMS calls INT 67/AH=40h-5Dh
SeeAlso: AX=4403h/SF=02h,AX=4403h/SF=03h,AX=4403h/SF=06h
--------m-214403SF06-------------------------
INT 21 U - Qualitas 386MAX v7.00+ - ALLOW AUTOMATIC ACTIVATION ON ANY INT 67
        AX = 4403h subfn 06h
        BX = handle for device "386MAX$$"
        DS:DX -> BYTE 06h
        CX ignored
Return: CF clear if successful
            AX destroyed
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Desc:   specified that 386MAX should shift from AUTO to ON mode on any INT 67
          call other than INT 67/AH=3Fh
SeeAlso: AX=4403h/SF=01h,AX=4403h/SF=03h,AX=4403h/SF=05h
--------n-214403-----------------------------
INT 21 U - PenDOS PENDEV.SYS - ???
        AX = 4403h
        BX = file handle for device "$$PENDOS" or "$$PD_REG"
        CX = size of buffer
        DS:DX -> buffer containing ???
Return: CF clear if successful
            buffer filled
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: A limited version of PenDOS by Communication Intelligence Corporation,
          which provides pen capability to keyboard-based programs, is bundled
          with IBM DOS 6.1
Note:   this call sets the WORD at offset 1Ah into the device driver request
          header used to call the driver to 0000h.
SeeAlso: AX=4402h"PENDEV.SYS"
--------D-214404-----------------------------
INT 21 - DOS 2+ - IOCTL - READ FROM BLOCK DEVICE CONTROL CHANNEL
        AX = 4404h
        BL = drive number (00h = default, 01h = A:, etc.)
        CX = number of bytes to read
        DS:DX -> buffer
Return: CF clear if successful
            AX = number of bytes actually read
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Notes:  format of data is driver-specific
        this function was not supported by Digital Research's DOS-Plus
SeeAlso: AX=4402h"DOS 2+",AX=4405h"DOS",INT 2F/AX=122Bh
--------k-214404-----------------------------
INT 21 - Stacker - GET DEVICE DRIVER ADDRESS AND SET VOLUME NUMBER
        AX = 4404h
        BL = drive number (00h = default, 01h = A:, etc.)
        CX = 0004h
        DS:DX -> DWORD buffer to receive device driver address
Return: buffer filled with pointer into Stacker device driver (see #02550):
          driver + 19h if Stacker Anywhere controls this drive
          driver + 1Ah if Stacker controls this drive
          unchanged else
Notes:  in addition to returning the address of the Stacker device driver,
          this call also sets the volume number at offset 58h in the device
          driver (see #02550 at INT 25/AX=CDCDh)
        Stacker Anywhere does not link its built-in device driver into
          the standard device driver chain, but it can be found via CDS/DPB
        this call can be used as an installation check for all versions of
          Stacker and Stacker Anywhere to avoid the INT 25 call
SeeAlso: AX=4408h,AX=440Eh,AH=52h,INT 25/AX=CDCDh
--------k-214404-----------------------------
INT 21 - Stacker - GET STACVOL FILE SECTORS
        AX = 4404h
        BL = drive number (0 is current drive)
        CX = byte count (i.e., 200h = 1 sector)
        DS:DX -> buffer (see #01529)
Return: Data Buffer contains the number of sectors requested from the
          STACVOL physical file for the drive specified.

Format of Stacker buffer:
Offset  Size    Description     (Table 01529)
 00h    WORD    01CDh
 02h    WORD    sector count
 04h    DWORD   number of starting sector
 08h    DWORD   far pointer to Data Buffer
--------k-214404-----------------------------
INT 21 - DUBLDISK.SYS v2.6 - GET INFO
        AX = 4404h
        BL = drive number of DoubleDisk drive (00h = default, 01h = A:, etc.)
        CX = number of bytes (000Ah-0014h, call ignored otherwise)
        DS:DX -> data record (see #01530)
Return: CF clear if successful
            AX = number of bytes read
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: DUBLDISK.SYS is the device driver portion of DoubleDisk, a disk
          expander by Vertisoft Systems, Inc.
InstallCheck:   for v2.6, scan memory for the signature "FAT 2.6  byte:",
          which is immediately followed by a data table (see #01531)
BUG:    VOPT (a disk optimizer by Golden Bow Software) assumes that any driver
          which returns the "correct" number of bytes when the first word of
          the buffer for the data record contains the signature value 4444h is
          DoubleDisk; a workaround is for the non-DoubleDisk driver to return
          no data if the signature is present
SeeAlso: AX=440Dh"DOS 3.2+"
Index:  installation check;DUBLDISK.SYS

Format of DUBLDISK data record:
Offset  Size    Description     (Table 01530)
 00h    WORD    (call) signature 4444h
 02h    BYTE    (call) function
                        00h ???
                        01h ???
---function 00h---
 02h    BYTE    (ret) ???
 03h    BYTE    (ret) ???
---function 01h---
 02h    WORD    (ret) 4444h
 04h    WORD    allocation unit size???
 06h    WORD    ???
 08h    WORD    ???
 0Ah    BYTE    ???

Format of DUBLDISK signature data table:
Offset  Size    Description     (Table 01531)
 00h  5 BYTEs   ???
 05h    BYTE    first drive number
 06h    BYTE    number of drives
 07h    ???
--------k-214404-----------------------------
INT 21 - DBLSPACE.BIN - IOCTL - FLUSH OR INVALIDATE INTERNAL CACHES
        AX = 4404h
        BL = drive number (00h = default, 01h = A:, etc)
        CX = 000Ah (size of DSPACKET structure)
        DS:DX -> DSPACKET structure (see #01532)
Return: CF clear if IOCTL successful -- check DSPACKET for actual status
            AX = number of bytes actually transferred
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
SeeAlso: AX=4405h"DBLSPACE",INT 2F/AX=4A11h/BX=0000h

Format of DoubleSpace DSPACKET structure:
Offset  Size    Description     (Table 01532)
 00h    WORD    signature 444Dh ("DM")
 02h    BYTE    command code
                46h ('F') flush internal caches
                49h ('I') flush and invalidate internal caches
 03h    WORD    result code
                (ret) 4F4Bh ("OK") if successful, else unchanged
 05h  5 BYTEs   padding
--------k-214404-----------------------------
INT 21 - DBLSPACE.BIN v6.2 - IOCTL - GET ??? FOR SPECIFIED DRIVE
        AX = 4404h
        BL = drive number (00h = default, 01h = A:, etc)
        CX = size of DSPACKET structure (ignored in DOS 6.2)
        DS:DX -> DSPACKET structure (see #01533)
Return: CF clear if IOCTL successful -- check DSPACKET for actual status
            AX = number of bytes actually transferred
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
SeeAlso: AX=4405h"DBLSPACE",INT 2F/AX=4A11h/BX=0000h

Format of DoubleSpace DSPACKET structure:
Offset  Size    Description     (Table 01533)
 00h    WORD    signature 444Dh ("DM")
 02h    BYTE    command code
                53h ('S') get ??? for specified drive
 03h    WORD    result code
                (ret) 4F4Bh ("OK") if successful, else unchanged
 05h    DWORD   (ret) pointer to 96-byte ??? data
 09h    DWORD   (ret) pointer to ??? data
 0Dh  3 BYTEs   reserved
--------k-214404-----------------------------
INT 21 U - DoubleTools v1.0 - GET ???
        AX = 4404h
        BL = drive number (00h = default, 01h = A:, etc)
        CX = 0006h
        DS:DX -> DoubleTools structure (see #01534)
Return: CF clear if IOCTL successful -- check DSPACKET for actual status
            AX = number of bytes actually transferred
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Note:   the Transporter device driver has the signature 55h 61h 50h 74h
          ("DaPt") twelve bytes after it beginning

Format of DoubleTools structure:
Offset  Size    Description     (Table 01534)
 00h    WORD    (call) signature 55h AAh
                (ret) signature 78h 70h ("xp")
 02h    WORD    (call) signature 52h 16h
                (ret) ???
 04h    WORD    (ret) segment of driver's DS (same as its PSP)
--------d-214404-----------------------------
INT 21 U - xDISK v3.31 - CONFIGURE
        AX = 4404h
        BL = drive number (00h = default, 01h = A:, etc)
        CX = 0047h (length of version string)
        DS:DX -> 79-byte buffer for version string and ???
        DS:0081h = commandline containing new switches for driver
Return: CF clear if successful
            AX = number of bytes actually transferred
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: xDISK is a shareware resizeable EMS RAMdisk by FM de Monasterio
SeeAlso: AX=4405h"xDISK",INT 2F/AH=DDh/BX=7844h"xDISK"
--------c-214404-----------------------------
INT 21 - COMBI-disk v1.13 - GET DATA RECORD
        AX = 4404h
        BL = drive number (00h = default, 01h = A:, etc)
        CX = 0032h (length of data packet)
        DS:DX -> buffer for data packet (see #01535)
Return: CF clear if successful
            AX = number of bytes actually transferred
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: COMBI-disk is a shareware combination cache and RAMdisk sharing a
          single pool of memory by Vadim V. Vlasov
InstallCheck:   scan the valid drives for one which returns a correctly-sized
          data packet with the proper signature in the first field
SeeAlso: AX=4405h"COMBI"
Index:  installation check;COMBI-disk

Format of COMBI-disk data packet:
Offset  Size    Description     (Table 01535)
 00h  6 BYTEs   ASCIZ signature "COMBI"
 06h    WORD    version (high byte = major, low = decimal minor version)
 08h    BYTE    current options
 09h    BYTE    sectors per allocation block
 0Ah    WORD    maximum buffer in KB
 0Ch    WORD    current buffer in KB (less than max if XMS memory being lent)
 0Eh    WORD    total number of allocation blocks
 10h    WORD    current number of allocation blocks
 12h    WORD    number of blocks being used by RAM disk
 14h    WORD    number of blocks being used by cache or unused
 16h    WORD    number of dirty cache blocks
 18h    WORD    number of blocks which could not be written out due to errors
 1Ah    WORD    total number of read requests
 1Ch    WORD    total number of sectors read
 1Eh    WORD    number of BIOS read requests (cache misses)
 20h    WORD    number of sectors read via BIOS (cache misses)
 22h    WORD    total number of write requests
 24h    WORD    total number of sectors written
 26h    WORD    number of BIOS write requests
 28h    WORD    number of sectors written via BIOS
 2Ah    WORD    number of RAM disk read requests
 2Ch    WORD    number of sectors read from RAM disk
 2Eh    WORD    number of RAM disk write requests
 30h    WORD    number of sectors written to RAM disk
--------d-214404-----------------------------
INT 21 - SFS v1.00 - GET CONFIGURATION INFORMATION
        AX = 4404h
        BL = drive number (00h = default, 01h = A:, etc)
        CX = 001Ah (length of data packet)
        DS:DX -> buffer for data packet (see #01536)
Return: CF clear if successful
            AX = number of bytes actually transferred
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: SFS (Secure FileSystem) is a shareware encrypting disk driver by
          Peter C. Gutmann
SeeAlso: AX=4405h"SFS"

Format of SFS data packet:
Offset  Size    Description     (Table 01536)
 00h  4 BYTEs   signature string "SFS1"
 04h    WORD    SFS unit number (0-based)
 06h    WORD    drive on which the SFS volume is mounted
 08h    DWORD   sector offset of logical volume from start of physical volume
                0 if logical volume = physical volume
 0Ch    WORD    flag: 00h = no disk mounted, 01h = disk mounted
 0Eh    WORD    flag: 00h read/write, 01h read-only
 10h    WORD    quick-unmount hotkey
                (high byte = shift state, low = scan code) (see #00006)
 12h    WORD    auto-unmount time in minutes, or 0000h if already expired, or
                FFFFh if not set
 14h    WORD    time in minutes remaining before auto-unmount
 16h    WORD    internal driver check code
                0000h no error
                0001h driver consistency check failed
                0002h unit consistency check failed
 18h    WORD    disk access mode
                0000h BIOS
                0001h IDE direct access
                0002h SCSI direct access
--------D-214405-----------------------------
INT 21 - DOS 2+ - IOCTL - WRITE TO BLOCK DEVICE CONTROL CHANNEL
        AX = 4405h
        BL = drive number (00h = default, 01h = A:, etc)
        CX = number of bytes to write
        DS:DX -> data to write
Return: CF clear if successful
            AX = number of bytes actually written
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Notes:  format of data is driver-specific
        this function was not supported by Digital Research's DOS-Plus
SeeAlso: AX=4403h"DOS",AX=4404h"DOS",INT 2F/AX=122Bh
--------d-214405-----------------------------
INT 21 - Brian Antoine Seagate ST-01 SCSI.SYS - IOCTL - EXECUTE COMMANDS
        AX = 4405h
        BX = drive number (00h = default, 01h = A:, etc)
        CX = number of bytes to write
        DS:DX -> SCSIDISK control block (see also #01525 at AX=4403h"ST-01")
Return: CF clear if successful
            AX = number of bytes actually written
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
SeeAlso: AX=4403h"ST-01"
--------k-214405-----------------------------
INT 21 U - DBLSPACE.BIN - IOCTL - FLUSH OR INVALIDATE INTERNAL CACHES
        AX = 4405h
        BL = drive number (00h = default, 01h = A:, etc)
        CX = 000Ah (size of DSPACKET structure)
        DS:DX -> DSPACKET structure (see #01537)
Return: CF clear if IOCTL successful -- check DSPACKET for actual status
            AX = number of bytes actually transferred
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Note:   this call is identical to the documented AX=4404h
SeeAlso: AX=4404h"DBLSPACE",INT 2F/AX=4A11h/BX=0000h

Format of DoubleSpace DSPACKET structure:
Offset  Size    Description     (Table 01537)
 00h    WORD    signature 444Dh ("DM")
 02h    BYTE    command code
                46h ('F') flush internal caches
                49h ('I') flush and invalidate internal caches
 03h    WORD    result code
                (ret) 4F4Bh ("OK") if successful, else unchanged
 05h  5 BYTEs   padding
--------d-214405-----------------------------
INT 21 U - xDISK v3.31 - ???
        AX = 4405h
        BL = drive number (00h = default, 01h = A:, etc)
        CX = number of bytes to write
        DS:DX -> buffer containing version string
        ???
Return: CF clear if successful
            AX = number of bytes actually transferred
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: xDISK is a shareware resizeable EMS RAMdisk by FM de Monasterio
SeeAlso: AX=4404h"xDISK",INT 2F/AH=DDh/BX=7844h"xDISK"
--------d-214405-----------------------------
INT 21 - COMBI-disk v1.13 - CONTROL COMBI-disk
        AX = 4405h
        BL = drive number (00h = default, 01h = A:, etc) for RAM disk
        CX = number of bytes to write
        DS:DX -> buffer containing command packet (see #01539)
Return: CF clear if successful
            AX = number of bytes actually transferred
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
SeeAlso: AX=4404h"COMBI"

(Table 01538)
Values for COMBI-disk command code:
 80h    flush cache
 81h    change options byte
 82h    shrink memory
 83h    expand memory
 84h    get dirty block information
 85h    reset write errors
 86h    reset counters

Format of COMBI-disk command packet:
Offset  Size    Description     (Table 01539)
 00h    WORD    version
 02h    BYTE    command code (see #01538)
---command code 80h---
 no additional fields
---command code 81h---
 03h    BYTE    new options byte (see #01540)
---command code 82h---
 03h    WORD    number of KB to release
---command code 83h---
 03h    WORD    number of KB to expand
---command code 84h---
 03h    DWORD   -> buffer for block info (see #01541)
---command code 85h---
 03h    DWORD   block ID
---command code 86h---
 03h    BYTE    which counters to reset
                bit 0: hard disk read counts
                bit 1: hard disk write counts
                bit 2: RAM disk read/write counts
Note:   multiple commands may be placed in a single packet by stringing
          together as many command/argument pairs as desired

Bitfields for COMBI-disk options byte:
Bit(s)  Description     (Table 01540)
 0      cache off
 1      cache frozen
 2      write caching enabled
 3      delayed writing disabled
 5      fix memory allocation (no XMS lending)
 6      no 'sector not found' error

Format of COMBI-disk block info:
Offset  Size    Description     (Table 01541)
 00h    DWORD   block ID
 04h    BYTE    bitmask of valid sectors in block
 05h    BYTE    bitmask of dirty sectors in block
 06h    BYTE    last error returned by BIOS
 07h    BYTE    number of errors
--------D-214405-----------------------------
INT 21 - SFS v1.00 - DRIVER CONTROL
        AX = 4405h
        BL = drive number (00h = default, 01h = A:, etc)
        CX = number of bytes to write
        DS:DX -> data to write (see #01543)
Return: CF clear if successful
            AX = number of bytes actually written
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Program: SFS (Secure FileSystem) is a shareware encrypting disk driver by
          Peter C. Gutmann
SeeAlso: AX=4404h"SFS"

(Table 01542)
Values for SFS control function:
 00h    "PACKET_SET_DISKINFO"    set disk parameters
 01h    "PACKET_SET_KEYINFO"     set keying information
 02h    "PACKET_SET_READONLY"    select read/write or read-only
 03h    "PACKET_SET_DRIVENO"     set drive number to mount
 04h    "PACKET_SET_MOUNTSTATUS" set mount status
 05h    "PACKET_SET_UNMOUNT"     set/clear quick-unmount hotkey
 06h    "PACKET_SET_TIMEOUT"     set/clear auto-unmount timeout

Format of SFS control data packet:
Offset  Size    Description     (Table 01543)
 00h    WORD    signature 4330h ('C0')
 02h    WORD    function (see #01542)
---function 00h---
 04h    WORD    sector size in bytes
 06h    BYTE    sectors per cluster
 07h    WORD    number of boot sectors
 09h    BYTE    number of copies of FAT
 0Ah    WORD    size of root directory in entries
 0Ch    WORD    number of sectors on disk, 16-bit
 0Eh    BYTE    media descriptor byte
 0Fh    WORD    sectors per FAT
 11h    WORD    sectors per track
 13h    WORD    number of heads
 15h    DWORD   number of hidden sectors
 19h    DWORD   number of sectors on disk, 32-bit
---function 01h---
 04h 20 BYTEs   master IV for encrypted disk
 18h 64 BYTEs   NDC/SHS keying information
---function 02h---
 04h    WORD    read-only state: 00h read-only, 01h read/write
---function 03h---
 04h    WORD    drive number (see #01544)
 06h    DWORD   sector offset of logical volume from start of physical volume
                0 if logical volume = physical volume
---function 04h---
 04h    WORD    mount status (00h unmounted, 01h mounted)
---function 05h---
 04h    WORD    hotkey (high byte = shift state, low byte = scan code or 00h)
                (see #00006)
                0000h to disable hotkey
---function 06h---
 04h    WORD    timeout in minutes before automatic unmount
                0000h to disable auto-unmount
Notes:  the data for function 00h corresponds to a DOS BPB (see AH=53h)
        functions 00h, 01h, and 03h automatically unmount the encrypted drive
        unmounting a drive with function 04h also destroys the encryption
          information in the driver and forces all dirty buffers to be flushed

Bitfields for SFS drive number:
Bit(s)  Description     (Table 01544)
 15-12  drive access mode
        0000 BIOS access
        0001 direct IDE access
        0010 direct SCSI access
---if BIOS access---
 11-8   unused (0)
 7-0    BIOS drive number
---if IDE access---
 11-8   unused (0)
 7-0    IDE drive number
---if SCSI access---
 11-8   SCSI host number
 7-4    SCSI target ID
 3-0    SCSI logical unit number
--------D-214406-----------------------------
INT 21 - DOS 2+ - IOCTL - GET INPUT STATUS
        AX = 4406h
        BX = file handle
Return: CF clear if successful
            AL = input status
                00h not ready (device) or at EOF (file)
                FFh ready
            AH may be destroyed (refer to note)
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Notes:  files may not register as being at EOF if positioned there by AH=42h
        under DOS 5.0, on a successful return, AH contains either the next
          character which will be read or 1Ah if at EOF; under a Windows95
          DOS box, AH seems to be either unchanged or 00h
        this function was not supported by Digital Research's DOS-Plus
BUG:    the CLOCK$ device under DR DOS 3.41 always indicates 'Ready'; this was
          corrected in v5.0
SeeAlso: AX=4407h,INT 2F/AX=122Bh
--------D-214407-----------------------------
INT 21 - DOS 2+ - IOCTL - GET OUTPUT STATUS
        AX = 4407h
        BX = file handle
Return: CF clear if successful
            AL = input status
                00h not ready
                FFh ready
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Notes:  for DOS 2+, files are always ready for output, even if the disk is
          full or no media is in the drive
        this function was not supported by Digital Research's DOS-Plus
SeeAlso: AX=4406h,INT 2F/AX=122Bh
--------D-214408-----------------------------
INT 21 - DOS 3.0+ - IOCTL - CHECK IF BLOCK DEVICE REMOVABLE
        AX = 4408h
        BL = drive number (00h = default, 01h = A:, etc)
Return: CF clear if successful
            AX = media type (0000h removable, 0001h fixed)
        CF set on error
            AX = error code (01h,0Fh) (see #01680 at AH=59h/BX=0000h)
Notes:  in addition to the normal operation, if Stacker is installed, this
          call also sets the volume number at offset 58h in the Stacker
          device driver (except under DR DOS 3.41-5.0, which do not pass
          through this call to the driver; use AX=440Eh instead)
          (see AX=4404h"Stacker",AX=440Eh,INT 25/AX=CDCDh)
        this function was not supported by Digital Research's DOS-Plus
SeeAlso: AX=4400h,AX=4404h"Stacker",AX=4409h,INT 2F/AX=122Bh
--------D-214409-----------------------------
INT 21 - DOS 3.1+ - IOCTL - CHECK IF BLOCK DEVICE REMOTE
        AX = 4409h
        BL = drive number (00h = default, 01h = A:, etc)
Return: CF clear if successful
            DX = device attribute word
                bit 15: drive is SUBSTituted
                bit 13: (DR DOS 3.41/5.0 local drives only) always set
                        media ID needed
                bit 12: drive is remote
                bit  9: direct I/O not allowed
        CF set on error
            AX = error code (01h,0Fh,15h) (see #01680 at AH=59h/BX=0000h)
Notes:  on local drives, DX bits not listed above are the attribute word from
          the device driver header (see #01646 at AH=52h); for remote drives,
          the other bits appear to be undefined for MS-DOS versions prior to
          5.0 (they are all cleared in DOS 5+)
        checking whether DX=0800h on return appears to be a fairly reliable
          method for detecting Microsoft's RAMDRIVE, though not for other
          ramdisks (there appears to be no simple yet foolproof method for
          detecting ramdisks, although the presence of only a single copy of
          the FAT and only a single head on non-removable devices is a fairly
          good indicator); for Windows95, RAMDRIVE returns DX=4800h
        for non-existent remote drives, this function sometimes returns
          AX=0015h (drive not ready) instead of AX=000Fh (invalid drive) on
          the first call; a subsequent call will return the correct error
          code
        this function was not supported by Digital Research's DOS-Plus
SeeAlso: AX=4400h,AX=4408h,AX=440Ah,INT 2F/AX=122Bh
--------D-21440A-----------------------------
INT 21 - DOS 3.1+ - IOCTL - CHECK IF HANDLE IS REMOTE
        AX = 440Ah
        BX = handle
Return: CF clear if successful
            DX = attribute word (as stored in SFT)
                bit 15: set if remote
                bit 14: date/time not set on close
        CF set on error
            AX = error code (01h,06h) (see #01680 at AH=59h/BX=0000h)
Notes:  if file is remote, Novell Advanced NetWare 2.0 returns the number of
          the file server on which the handle is located in CX
        DR DOS 3.41 and 5.0 clear all bits of DX except bit 15; Novell DOS 7
          fully supports this function
        this function was not supported by Digital Research's DOS-Plus
SeeAlso: AX=4400h,AX=4409h,AH=52h,INT 2F/AX=122Bh
--------D-21440B-----------------------------
INT 21 - DOS 3.1+ - IOCTL - SET SHARING RETRY COUNT
        AX = 440Bh
        CX = pause between retries (default 1)
        DX = number of retries (default 3)
Return: CF clear if successful
        CF set on error
            AX = error code (01h) (see #01680 at AH=59h/BX=0000h)
Notes:  delay is dependent on processor speed (value in CX specifies number of
          64K-iteration empty loops to execute)
        if DX=0000h on entry, the retry count is left unchanged
        this function was not supported by Digital Research's DOS-Plus
SeeAlso: AH=52h,INT 2F/AX=1224h,INT 2F/AX=122Bh
--------D-21440C-----------------------------
INT 21 - DOS 3.2+ - IOCTL - GENERIC CHARACTER DEVICE REQUEST
        AX = 440Ch
        BX = device handle
        CH = category code (see #01545)
        CL = function number (see #01546)
        DS:DX -> parameter block (see #01547,#01548,#01549,#01550,#01551,#01552)
        SI = parameter to pass to driver (European MS-DOS 4.0, OS/2 comp box)
        DI = parameter to pass to driver (European MS-DOS 4.0, OS/2 comp box)
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            DS:DX -> iteration count if CL=65h
            SI = returned value (European MS-DOS 4.0, OS/2 comp box)
            DI = returned value (European MS-DOS 4.0, OS/2 comp box)
Note:   DR DOS 3.41 and 5.0 return error code 16h on CL=45h,65h if the device
          does not support a retry counter
SeeAlso: AX=440Dh"DOS 3.2+",INT 2F/AX=0802h,INT 2F/AX=122Bh,INT 2F/AX=14FFh
SeeAlso: INT 2F/AX=1A01h

(Table 01545)
Values for IOCTL category code:
 00h    unknown (DOS 3.3+)
 01h    COMn: (DOS 3.3+)
 03h    CON (DOS 3.3+)
 05h    LPTn:
 9Eh    Media Access Control driver (STARLITE)
 00h-7Fh reserved for Microsoft
 80h-FFh reserved for OEM/user-defined

(Table 01546)
Values for generic character IOCTL function:
 00h    MAC driver Bind (STARLITE) (see #01547)
 45h    set iteration (retry) count (see #01548)
 4Ah    select code page (see #01549)
 4Ch    start code-page preparation (see #01550)
 4Dh    end code-page preparation (see #01551)
 5Fh    set display information (DOS 4.0+) (see #01552)
 65h    get iteration (retry) count
 6Ah    query selected code page (see #01549)
 6Bh    query prepare list (see #01553)
 7Fh    get display information (DOS 4.0+) (see #01552)
Note:   bit assignments for function code:
            bit 7: set to ignore if unsupported, clear to return error
            bit 6: set if passed to driver, clear if intercepted by DOS
            bit 5: set if queries data from device, clear if sends command
            bits 4-0: subfunction

Format of parameter block for function 00h:
Offset  Size    Description     (Table 01547)
 00h  8 BYTEs   ASCIZ signature "STARMAC"
 08h    WORD    version
 0Ah    WORD    flags
                bit 0: media requires connect or listen request before use
                bit 1: network is a LAN (broadcast/multicast supported)
                bit 2: point-to-point network
 0Ch    WORD    handle for use with MAC driver's private interface (filled in
                by MAC driver)
 0Eh    WORD    context
 10h    WORD    approximate speed in KB/sec (filled in by MAC driver)
 12h    WORD    approximate cost in cents per hour (filled in by MAC driver)
 14h    WORD    maximum packet size in bytes (filled in by MAC driver)
 16h    WORD    addressing format (filled in by MAC driver)
                0000h general addressing
                0001h Ethernet addressing
                0002h Token Ring addressing
                0003h Token Bus addressing
 18h    DWORD   Send entry point (filled in by MAC driver)
 1Ch    DWORD   RegisterEventHandler entry point (filled in by MAC driver)
 20h    DWORD   SetPacketFilter entry point (filled in by MAC driver)
 24h    DWORD   UnBind entry point (filled in by MAC driver)

Format of parameter block for function 45h:
Offset  Size    Description     (Table 01548)
 00h    WORD    number of times output is attempted before driver assumes
                  device is busy

Format of parameter block for functions 4Ah and 6Ah:
Offset  Size    Description     (Table 01549)
 00h    WORD    length of data
 02h    WORD    code page ID (see #01757 at INT 21/AX=6602h)
 04h 2N BYTEs   DCBS (double byte character set) lead byte range
                  start/end for each of N ranges (DOS 4.0)
        WORD    0000h  end of data (DOS 4.0)

Format of parameter block for function 4Ch:
Offset  Size    Description     (Table 01550)
 00h    WORD    flags
                DISPLAY.SYS = 0000h
                PRINTER.SYS bit 0 clear to prepare downloaded font, set to
                        prepare cartridge selection
 02h    WORD    length of remainder of parameter block
 04h    WORD    number of code pages following
 06h  N WORDs   code page 1,...,N

Format of parameter block for function 4Dh:
Offset  Size    Description     (Table 01551)
 00h    WORD    length of data
 02h    WORD    code page ID (see #01757 at INT 21/AX=6602h)

Format of parameter block for functions 5Fh and 7Fh:
Offset  Size    Description     (Table 01552)
 00h    BYTE    level (0 for DOS 4.x-6.0)
 01h    BYTE    reserved (0)
 02h    WORD    length of following data (14)
 04h    WORD    control flags
                bit 0 set for blink, clear for intensity
                bits 1-15 reserved
 06h    BYTE    mode type (1=text, 2=graphics)
 07h    BYTE    reserved (0)
 08h    WORD    colors
                0000h = monochrome
                else N bits per pixel
 0Ah    WORD    pixel columns
 0Ch    WORD    pixel rows
 0Eh    WORD    character columns
 10h    WORD    character rows

Format of parameter block for function 6Bh:
Offset  Size    Description     (Table 01553)
 00h    WORD    length of following data
 02h    WORD    number of hardware code pages
 04h  N WORDs   hardware code pages 1,...,N
        WORD    number of prepared code pages
      N WORDs   prepared code pages 1,...,N
--------d-21440C-----------------------------
INT 21 - Greg Shenaut ASPITAPE.SYS - INTERFACE
        AX = 440Ch
        BX = device handle
        CH = category code
            07h tape (ASPITAPE.SYS)
        CL = function
            01h "mtop" - perform tape operation
            02h "mtget" - get tape status
            03h ignore end-of-tape errors
            04h enable end-of-tape errors
        DS:DX -> parameter block (see #01554,#01555)
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            DS:DX -> data block
Notes:  This device driver is a simple DOS interface to the Adaptec Advanced
          SCSI Programming Interface (ASPI).  It provides the following device
          names as access to the SCSI tape, 'RMTx' (rewind on close) and
          'NRMTx' (NO rewind on close) where x can go from 0 to 3.  There may
          also be the following names 'MTx' and 'NMTx' which default to 1024
          byte blocks.  The names may also have a '$' appended to try and make
          them unique from file names of 'RMT0' etc.
        once opend these devices must be put into RAW mode
SeeAlso: AX=4402h"ASPI"

Format of ASPITAPE.SYS mtop parameter block:
Offset  Size    Description     (Table 01554)
 00h    WORD    operation code
                00h "MTWEOF" - write an end-of-file record
                01h "MTFSF" - forward space file
                02h "MTBSF" - backward space file
                03h "MTFSR" - forward space record
                04h "MTBSR" - backward space record
                05h "MTREW" - rewind
                06h "MTOFFL" - rewind and unload
                07h "MTNOP" - perform TEST UNIT READY
 02h    DWORD   repetition count

Format of ASPITAPE.SYS mtget parameter block:
Offset  Size    Description     (Table 01555)
 00h    BYTE    ASPI host ID
 01h    BYTE    SCSI target ID
 02h    BYTE    SCSI logical unit number
 03h    BYTE    device parameters
                bit 0: drive must use fixed-block read and write
                bit 7: drive is an ASPI device
 04h    BYTE    current device state (see #01556)
 05h    BYTE    unit number within driver
 06h    WORD    fixed block blocksize
 08h    BYTE    last SCSI status
 09h    BYTE    last SCSI sense key
 0Ah    WORD    last SCSI opcode (packed) (see #01557)
 0Ch    WORD    residual bytes from SCSI opcode

Bitfields for ASPITAPE.SYS current device state:
Bit(s)  Description     (Table 01556)
 0      device currently opened in buffered mode
 1      drive currently opened in nonbuffered mode
 2      rewind drive on last close
 3      drive has been written on
 4      drive has been read from
 5      next read will return 0 bytes
 6      EOM will resemble EOF
 7      drive may be busy rewinding

Bitfields for SCSI opcode:
Bit(s)  Description     (Table 01557)
 0-7    SCSI operation (SCSI packet byte 0)
 8-10   SCSI flags (SCSI packet byte 1)
 11-12  ASPI "Direction Bits" (ASPI SRB byte 3)
--------D-21440D-----------------------------
INT 21 - DOS 3.2+ - IOCTL - GENERIC BLOCK DEVICE REQUEST
        AX = 440Dh
        BL = drive number (00h=default,01h=A:,etc)
        CH = category code (see #01558)
        CL = minor code (function) (see #01559)
        DS:DX -> (DOS) parameter block (see #01560,#01562,#01563,#01564,#01565)
        SI:DI -> (OS/2 comp box) parameter block (see #01566,#01568,#01569,#01572)
Return: CF set on error
            AX = error code (01h,02h,etc.) (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            DS:DX -> data block if CL=60h or CL=61h
Notes:  DOS 4.01 seems to ignore the high byte of the number of directory
          entries in the BPB for diskettes.
        functions 46h and 66h undocumented in DOS 4.x, documented for DOS 5+
        the DUBLDISK.SYS v2.6 driver only supports minor codes 60h and 67h
        DR DOS 3.41-6.0 only support minor codes 40h-42h and 60h-62h; all
          other minor codes return error code 16h
        some PCMCIA calls reportedly appear to be dangerous for MS-DOS versions
          prior to 5.0
        minor code 60h normally produces no I/O except with AutoMount=1 for
          DBLSPACE/DRVSPACE
SeeAlso: AX=440Ch,AX=440Dh/CX=084Ah,AX=440Dh/CX=0871h,AH=69h,INT 2F/AX=0802h
SeeAlso: INT 2F/AX=122Bh

(Table 01558)
Values for block device IOCTL category code:
 08h    disk drive
 48h    FAT32 disk drive
 00h-7Fh reserved for Microsoft
 80h-FFh reserved for OEM/user-defined

(Table 01559)
Values for generic block IOCTL minor code:
 00h    (OS/2)  \ used to lock/unlock a drive
 01h    (OS/2)  /
 40h    set device parameters (see #01560)
 41h    write logical device track (see #01562)
 42h    format and verify logical device track (see #01563)
 46h    (DOS 4.0+) set volume serial number (see #01565,AH=69h)
 47h    (DOS 4.0+) set access flag (see #01566)
 48h    (Enh. Disk Drive Spec) set media lock state (see #01567,INT 13/AH=45h)
 49h    (Enh. Disk Drive Spec) eject media in drive (see INT 13/AH=49h)
        no parameter block required
 4Ah    (MS-DOS 7.0) lock logical volume (see AX=440Dh/CX=084Ah)
 4Bh    (MS-DOS 7.0) lock physical volume (see AX=440Dh/CX=084Bh)
 50h    (PCMCIA) attribute memory write
 51h    (PCMCIA) common memory write
 52h    (PCMCIA) force media change (DOS 5+ ???) (see #01568)
 53h    (PCMCIA) erase drive
 54h    (PCMCIA) erase media
 56h    (PCMCIA) set erase status callback
 57h    (PCMCIA) append Card Information Structure (CIS) tuple
 58h    (PCMCIA) erase CIS tuples
 60h    get device parameters (see #01560)
 61h    read logical device track (see #01562)
 62h    verify logical device track (see #01564)
 66h    (DOS 4.0+) get volume serial number (see #01565,AH=69h)
 67h    (DOS 4.0+) get access flag (see #01566)
 68h    (DOS 5.0+) sense media type (see #01569)
 6Ah    (MS-DOS 7.0) unlock logical volume (see AX=440Dh/CX=086Ah)
        no parameter block required
 6Bh    (MS-DOS 7.0) unlock physical volume (see AX=440Dh/CX=086Bh)
        no parameter block required
 6Ch    (MS-DOS 7.0) get lock flag (see AX=440Dh/CX=086Ch)
        no parameter block required
 6Dh    (MS-DOS 7.0) enumerate open files (see AX=440Dh/CX=086Dh)
 6Eh    (MS-DOS 7.0) find swap file (see AX=440Dh/CX=086Eh)
 6Fh    (MS-DOS 7.0) get drive map information (see #01570)
 70h    (PCMCIA) attribute memory read
 70h    (MS-DOS 7.0) get current lock state (see AX=440Dh/CX=0870h)
        no parameter block required
 71h    (MS-DOS 7.0) get first cluster (see AX=440Dh/CX=0871h)
 73h    (PCMCIA) get memory media information (DOS 5+ ???) (see #01572)
 76h    (PCMCIA) get erase status callback
 77h    (PCMCIA) get first Card Information Structure (CIS) tuple
 78h    (PCMCIA) get next CIS tuple
 7Fh    (PCMCIA) get ??? information (see #01573,#01574)

Format of parameter block for functions 40h, 60h:
Offset  Size    Description     (Table 01560)
 00h    BYTE    special functions
                bit 0 set if function to use current BPB, clear if Device
                          BIOS Parameter Block field contains new default BPB
                bit 1 set if function to use track layout fields only
                        must be clear if CL=60h
                bit 2 set if all sectors in track same size (should be set)
                bits 3-7 reserved (MS-DOS, Novell DOS 7)
                bit 5: skip head settling time (WinDOS 2.11)
                bit 6: format access flag (WinDOS 2.11)
 01h    BYTE    device type (see #01561)
 02h    WORD    device attributes
                bit 0 set if nonremovable medium
                bit 1 set if door lock ("changeline") supported
                bits 2-15 reserved
 04h    WORD    number of cylinders
 06h    BYTE    media type
                for 1.2M drive
                    00h 1.2M disk (default)
                    01h 320K/360K disk
                F8h for DUBLDISK.SYS v2.6 expanded drives
                always 00h for other drive types
 07h 31 BYTEs   device BPB (see #01663 at AH=53h), bytes after BPB offset 1Eh
                  omitted; final six bytes only transferred on function 40h
                  with BYTE 00h bit 0 set for MS-DOS 5.0
---function 40h only---
 26h    WORD    number of sectors per track (start of track layout field)
                (maximum 63)
 28h  N word pairs: number,size of each sector in track
---category code 48h (FAT32), function 40h---
 07h 53 BYTEs   extended BPB (see #01664)
 3Ch 32 BYTEs   reserved
 5Ch    WORD    number of track table entries
 5Eh 2N WORDs   sector table (word pairs: number/size of each sector in track)
---category code 48h (FAT32), function 60h---
 07h 53 BYTEs   extended BPB (see #01664)
 3Ch 32 BYTEs   reserved

(Table 01561)
Values for device type:
 00h    320K/360K disk
 01h    1.2M disk
 02h    720K disk
 03h    single-density 8-inch disk
 04h    double-density 8-inch disk
 05h    fixed disk
 06h    tape drive
 07h    (DOS 3.3+) other type of block device, normally 1.44M floppy
 08h    read/write optical disk
 09h    (DOS 5+) 2.88M floppy

Format of parameter block for functions 41h, 61h:
Offset  Size    Description     (Table 01562)
 00h    BYTE    special functions (reserved, must be zero)
 01h    WORD    number of disk head
 03h    WORD    number of disk cylinder
 05h    WORD    number of first sector to read/write
 07h    WORD    number of sectors
 09h    DWORD   transfer address
Note:   under Windows95, a volume must be locked (see AX=440Dh/CX=084Bh) in
          order to perform direct accesses such as track reads and writes
          with this IOCTL function

Format of parameter block for function 42h:
Offset  Size    Description     (Table 01563)
 00h    BYTE    reserved, must be zero (DOS <3.2)
                  bit 0=0: format/verify track
                        1: format status call (DOS 3.2+), don't actually format
                  bit 1: format multiple tracks, require additional WORD
                          (hard disks only)
                  bits 2-7 reserved, must be zero
                value on return (DOS 3.3+):
                  00h   specified tracks, sectors/track supported by BIOS
                  01h   function not supported by BIOS
                  02h   specified tracks, sectors/track not allowed for drive
                  03h   no disk in drive
 01h    WORD    number of disk head
 03h    WORD    number of disk cylinder
---BYTE 00h bit 1 set---
 05h    WORD    number of tracks to format

Format of parameter block for function 62h:
Offset  Size    Description     (Table 01564)
 00h    BYTE    reserved, must be zero (DOS <3.2)
                  bit 0=0: verify single track
                        1: verify multiple tracks
                  bits 1-7 reserved, must be zero
                value on return (DOS 3.3+):
                  00h   specified tracks, sectors/track supported by BIOS
                  01h   function not supported by BIOS
                  02h   specified tracks, sectors/track not allowed for drive
                  03h   no disk in drive
 01h    WORD    number of disk head
 03h    WORD    number of disk cylinder
 05h    WORD    number of tracks to verify (equivalent to 255 or fewer sectors)

Format of parameter block for functions 46h, 66h:
Offset  Size    Description     (Table 01565)
 00h    WORD    (call) info level (should be 0000h)
 02h    DWORD   disk serial number (binary)
 06h 11 BYTEs   volume label or "NO NAME    "
 11h  8 BYTEs   filesystem type "FAT12   " or "FAT16   "
                  (generally CL=66h only, but MS-DOS 5.0 will write the
                  given filesystem type to the disk)
Note:   under MS-DOS 7.0 or a Windows95 DOS box, the volume label field can
          return as all blanks even when a volume label has been set (the Win95
          installation seems to blank the volume label field in the partition
          boot sector; once LABEL has been run, the volume label is reported
          correctly)
SeeAlso: AH=69h

Format of parameter block for functions 47h, 67h:
Offset  Size    Description     (Table 01566)
 00h    BYTE    special-function field (must be zero)
 01h    BYTE    disk-access flag, nonzero if access allowed by driver

Format of parameter block for function 48h:
Offset  Size    Description     (Table 01567)
 00h    BYTE    (call) locking operation
                00h lock media in drive
                01h unlock media
                02h get locking status
 01h    BYTE    (ret) drive's lock status (number of pending locks on drive)
Note:   also supported by MS-DOS 7.0+

Format of parameter block for function 52h:
 00h    BYTE    (call) unused???        (Table 01568)
                (ret) 00h if flash/ATA drive but no card inserted
                        unchanged otherwise
Notes:  the absense of a flash card should be tested by checking the DOS error
          code rather than the returned byte
        the parameter byte is cleared to 00h erroneously by the Award
          PCDISK.EXE v1.02c PCMCIA/ATA driver if no ATA card is inserted
          (bug corrected in PCDISK.EXE v1.02h and later)
        not supported by the SystemSoft ATADRV.EXE and the Phoenix PCMATA.SYS
          PCMCIA/ATA drivers

Format of parameter block for function 68h:
Offset  Size    Description     (Table 01569)
 00h    BYTE    01h for default media type, 00h for any other media type
                (see also INT 13/AH=20h"Compaq")
 01h    BYTE    02h for 720K, 07h for 1.44M, 09h for 2.88M

Format of parameter block for function 6Fh:
Offset  Size    Description     (Table 01570)
 00h    BYTE    (call) length of this buffer (in bytes)
 01h    BYTE    (ret) number of bytes in parameter block actually used
 02h    BYTE    (ret) drive flags (see #01571)
 03h    BYTE    (ret) physical drive number
                00h-7Fh floppy
                80h-FEh hard
                FFh no physical drive
 04h    DWORD   (ret) bitmap of logical drives associated with physical drive
                bit 0 = drive A:, etc.
 08h    QWORD   (ret) relative block address of partition start

Bitfields for Get Drive Map Information drive flags:
Bit(s)  Description     (Table 01571)
 0      protected-mode driver for logical drive
 1      protected-mode driver in use for physical drive corresponding to the
          logical drive
 2      drive available only in protected mode
 3      protected-mode drive supports media ejection
 4      drive issues media insertion and removal notifications
SeeAlso: #01570

Format of parameter block for function 73h:
Offset  Size    Description     (Table 01572)
 00h    BYTE    ???
                00h ATA card inserted ???
                80h ATA card not inserted ???
 01h    BYTE    length of parameter block ???
                apparently always 40h
 02h    BYTE    ???
                00h ATA card not inserted ???
                0Dh ATA card inserted ???
 03h  2 BYTEs   ??? (apparently always 00h)
 05h    BYTE    drive number (0=first) ???
 06h    BYTE    total number of drives ???
 07h    BYTE    ???
                00h ATA card not inserted ???
                01h ATA card inserted ???
 08h 17 BYTEs   ???
 19h    BYTE    ???
                00h ATA card not inserted ???
                01h ATA card inserted ???
 1Ah    BYTE    ??? (apparently always 01h)
 1Bh    BYTE    ???
                00h ATA card not inserted ???
                01h ATA card inserted ???
 1Ch  2 BYTEs   ??? (apparently always 0015h)
 1Eh  2 BYTEs   ???
 20h  2 BYTEs   ??? (apparently always 0110h)
 22h 15 BYTEs   ???
 31h  2 BYTEs   ??? (apparently always 7000h)
 33h 11 BYTEs   driver signature
                "AWARD PDISK" for Award PCDISK.EXE PCMCIA/ATA driver
                "MS-BIOS    " for HP 200LX generic ATA driver
 3Eh  2 BYTEs   ???
Notes:  parameter structure possibly depends on driver
        this function is not supported by the SystemSoft ATADRV.EXE and the
          Phoenix PCMATA.SYS PCMCIA/ATA drivers

Format of parameter block for function 7Fh for SystemSoft ATADRV.EXE:
Offset  Size    Description     (Table 01573)
 00h    DWORD   -> unknown location within driver
Note:   function supported by the SystemSoft ATADRV.EXE PCMCIA/ATA driver
          but not by the Award PCDISK.EXE PCMCIA/ATA driver
SeeAlso: #01574

Format of parameter block for function 7Fh for Phoenix PCMATA.SYS:
Offset  Size    Description     (Table 01574)
 00h  8 BYTEs   ???
Note:   this function supported by the Phoenix PCMATA.SYS PCMCIA/ATA driver
          but not by the Award PCDISK.EXE PCMCIA/ATA driver
SeeAlso: #01573
--------D-21440DCX084A-----------------------
INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - LOCK LOGICAL VOLUME
        AX = 440Dh
        CX = 084Ah (category code 08h, minor code 4Ah)
        BL = drive number (01h=A:,02h=B:,etc)
        BH = lock level (00h-04h)
        DX = drive permissions (see #01575) for Level 1 lock or second
            Level 0 lock when formatting
Return: CF set on error
            AX = error code (01h,02h,etc.) (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
Notes:  the logical volume must be locked before direct disk accesses are
          permitted by Windows95/98
        the commandline LOCK issues a level 4 lock
        Windows98 only permits lock levels 0 and 4
BUG:    Windows98 will return an error (invalid function) if the specified
          drive number is zero or more than 32, but only allocated 26 bytes
          for recording locks, so BL=1Bh..20h will trash internal data
          structures
SeeAlso: AX=440Dh"DOS 3.2+",AX=440Dh/CX=084Bh,AX=440Dh/CX=086Ah
SeeAlso: AX=440Dh/CX=086Ch

Bitfields for drive permissions:
Bit(s)  Description     (Table 01575)
 0      allow writes
 1      disallow new file mappings
 2      volume locked for formatting
--------D-21440DCX084B-----------------------
INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - LOCK PHYSICAL VOLUME
        AX = 440Dh
        CX = 084Bh (category code 08h, minor code 4Bh)
        BL = logical drive number (00h = default, 01h = A:, etc.)
        BH = lock level (00h-03h)
        DX = drive permissions (see #01575) for Level 1 lock or second
            Level 0 lock when formatting
Return: CF set on error
            AX = error code (01h,02h,etc.) (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
Desc:   lock all logical volumes on the same physical volume as the indicated
          drive
Note:   the physical volume must be locked before direct disk writes via
          INT 13 are permitted by Windows95
SeeAlso: AX=440Dh"DOS 3.2+",AX=440Dh/CX=084Ah,AX=440Dh/CX=086Bh
SeeAlso: AX=440Dh/CX=086Ch
--------D-21440DCX086A-----------------------
INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - UNLOCK LOGICAL VOLUME
        AX = 440Dh
        CX = 086Ah (category code 08h, minor code 6Ah)
        BL = drive number (00h=default,01h=A:,etc)
Return: CF set on error
            AX = error code (01h,02h,etc.) (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
Note:   the logical volume must be locked before direct disk accesses via
          INT 13 are permitted by Windows95
BUG:    Windows98 will return an error (invalid function) if the specified
          drive number is zero or more than 32, but only allocated 26 bytes
          for recording locks, so BL=1Bh..20h will trash internal data
          structures
SeeAlso: AX=440Dh"DOS 3.2+",AX=440Dh/CX=084Ah,AX=440Dh/CX=086Bh
--------D-21440DCX086B-----------------------
INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - UNLOCK PHYSICAL VOLUME
        AX = 440Dh
        CX = 086Bh (category code 08h, minor code 6Bh)
        BL = logical drive number (00h = default, 01h = A:, etc.)
Return: CF set on error
            AX = error code (01h,02h,etc.) (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
Desc:   lock all logical volumes on the same physical volume as the indicated
          drive
SeeAlso: AX=440Dh"DOS 3.2+",AX=440Dh/CX=084Bh,AX=440Dh/CX=086Ah
--------D-21440DCX086C-----------------------
INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - GET LOCK FLAG STATE
        AX = 440Dh
        CX = 086Ch (category code 08h, minor code 6Ch)
        BL = drive number (00h=default,01h=A:,etc)
Return: CF set on error
            AX = error code (01h,02h,etc.) (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            AX = access flag (see #01576)
SeeAlso: AX=440Dh"DOS 3.2+",AX=440Dh/CX=084Ah,AX=440Dh/CX=084Bh
SeeAlso: AX=440Dh/CX=0870h

(Table 01576)
Values for drive access flag:
 0000h  no writes/file mappings since last call
 0001h  write operation has occurred since last call
 0002h  file mapping has occurred since last call
Note:   function 6Ch resets the access flag every time it is called
--------D-21440DCX086D-----------------------
INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - ENUMERATE OPEN FILES
        AX = 440Dh
        CX = 086Dh (category code 08h, minor code 6Dh)
        BL = drive number (00h=default,01h=A:,etc)
        DS:DX -> buffer for ASCIZ pathname
        SI = file index (0000h to number of open files-1)
        DI = enumeration type (0000h all files, 0001h unmovable files)
Return: CF set on error
            AX = error code (01h,02h,12h,etc.) (see #01680 at AH=59h/BX=0000h)
                0012h if file index is out of range
        CF clear if successful
            AX = file open mode (BX from AX=6C00h or AX=716Ch)
            CX = file type (see #01577)
SeeAlso: AX=440Dh"DOS 3.2+",AX=440Dh/CX=084Ah,AX=440Dh/CX=086Ch
SeeAlso: AX=440Dh/CX=086Eh,AX=6C00h,AX=716Ch

(Table 01577)
Values for file type:
 0000h  normal file
 0001h  memory-mapped file (unmovable)
 0002h  unmovable file
 0004h  swap file
--------D-21440DCX086E-----------------------
INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - FIND SWAP FILE
        AX = 440Dh
        CX = 086Eh (category code 08h, minor code 6Eh)
        BL = drive number (00h=default,01h=A:,etc)
        DS:DX -> buffer for ASCIZ pathname
        SI = file index
        DI = enumeration type
Return: CF set on error
            AX = error code (01h,02h,etc.) (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            AX = pager type
                0001h no pager
                0002h paging through MS-DOS
                0003h protected-mode pager
            CX:BX = swap file size in 4K pages
SeeAlso: AX=440Dh"DOS 3.2+",AX=440Dh/CX=086Dh
--------D-21440DCX0870-----------------------
INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - GET CURRENT LOCK STATE
        AX = 440Dh
        CX = 0870h (category code 08h, minor code 70h)
        BL = drive number (00h=default,01h=A:,etc)
Return: CF set on error
            AX = error code (01h,02h,etc.) (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            AX = current lock level (0-3) or FFFFh if not locked
            CX = lock permissions if AX<>FFFFh (see #01575)
SeeAlso: AX=440Dh"DOS 3.2+",AX=440Dh/CX=086Ch
--------D-21440DCX0871-----------------------
INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - GET FIRST CLUSTER
        AX = 440Dh
        CX = 0871h (category code 08h, minor code 71h)
        BX = filename character set (see #01578)
        DS:DX -> ASCIZ pathname for file or directory
Return: CF set on error
            AX = error code (01h,02h,etc.) (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            DX:AX = first cluster number
Note:   this function finds any file or directory regardless of attributes,
          except that it will not find volume labels
SeeAlso: AX=440Dh"DOS 3.2+",AX=440Dh/CX=086Ch,#01352

(Table 01578)
Values for character set:
 00h    Windows ANSI
 01h    current OEM character set
 02h    Unicode
--------D-21440E-----------------------------
INT 21 - DOS 3.2+ - IOCTL - GET LOGICAL DRIVE MAP
        AX = 440Eh
        BL = drive number (00h=default,01h=A:,etc)
Return: CF set on error
            AX = error code (01h,0Fh) (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            AL = 00h block device has only one logical drive assigned
                 1..26 the last letter used to reference the drive (1=A:,etc)
Notes:  DR DOS 3.41-5.0 DRIVER.SYS does not support drive mapping and thus
          always returns AL=00h; Windows NT 4.0 also always returns AL=00h
        in addition to the normal operation, if Stacker is installed, this
          call also sets the volume number at offset 58h in the Stacker
          device driver (DR DOS 3.41-5.0 only; use AX=4408h otherwise)
          (see AX=4404h"Stacker",INT 25/AX=CDCDh)
SeeAlso: AX=4408h,AX=440Fh,INT 2F/AX=122Bh
--------D-21440F-----------------------------
INT 21 - DOS 3.2+ - IOCTL - SET LOGICAL DRIVE MAP
        AX = 440Fh
        BL = physical drive number (00h=default,01h=A:,etc))
Return: CF set on error
            AX = error code (01h,0Fh) (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            drive now responds to next logical drive number
Notes:  maps logical drives to physical drives, similar to DOS's treatment of
          a single physical floppy drive as both A: and B:
        DR DOS 3.41-5.0 DRIVER.SYS does not support drive mapping and thus
          always returns an error on this function
SeeAlso: AX=440Eh,INT 2F/AX=122Bh
--------D-214410-----------------------------
INT 21 - DOS 5+ - IOCTL - QUERY GENERIC IOCTL CAPABILITY (HANDLE)
        AX = 4410h
        BX = handle for device
        CH = category code (see #01545)
        CL = function code (see #01546)
Return: CF clear if successful
            AX = 0000h  specified IOCTL function is supported
        CF set on error
            AL = 01h    IOCTL capability not available
Note:   a program which wishes to use Generic IOCTL calls beyond those in the
          standard DOS 3.2 set may use this call first to see whether a
          particular call is supported
SeeAlso: AX=440Ch,AX=440Dh"DOS 3.2+",AX=4411h
--------d-214410BXFFFF-----------------------
INT 21 U - NewSpace - ENABLE DRIVER
        AX = 4410h
        BX = FFFFh
Program: NewSpace is a TSR by Isogon Corporation which automatically compresses
          all files as they are written and decompresses them as they are read
Note:   compressed files are not accessible unless the driver is enabled
SeeAlso: AX=4411h/BX=FFFFh
--------D-214411-----------------------------
INT 21 - DOS 5+ - IOCTL - QUERY GENERIC IOCTL CAPABILITY (DRIVE)
        AX = 4411h
        BL = drive number
        CH = category code (see #01558)
        CL = function code (see #01559)
Return: CF clear if successful
            AX = 0000h  specified IOCTL function is supported
        CF set on error
            AL = 01h    IOCTL capability not available
Note:   a program which wishes to use Generic IOCTL calls beyond those in the
          standard DOS 3.2 set may use this call first to see whether a
          particular call is supported
SeeAlso: AX=440Ch,AX=440Dh"DOS 3.2+",AX=4410h
--------d-214411BXFFFF-----------------------
INT 21 U - NewSpace - DISABLE DRIVER
        AX = 4411h
        BX = FFFFh
Program: NewSpace is a TSR by Isogon Corporation which automatically compresses
          all files as they are written and decompresses them as they are read
Note:   compressed files are not accessible unless the driver is enabled
SeeAlso: AX=4410h/BX=FFFFh
--------O-214412-----------------------------
INT 21 O - DR DOS 5.0-6.0 - DETERMINE DOS TYPE
        AX = 4412h
        CF set
Return: CF set if not DR DOS
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if DR DOS
            DX = AX = version code (see #01580)
Note:   this obsolete call, which is no longer supported in Novell DOS 7, is
          identical to AX=4452h
SeeAlso: AX=4452h
--------d-214412BXFFFF-----------------------
INT 21 U - NewSpace - INSTALLATION CHECK???
        AX = 4412h
        BX = FFFFh
Return: AX = PSP segment of NewRes (resident driver for NewSpace)
        BX:DX -> ???
        CX = ???
SeeAlso: AX=4411h/BX=FFFFh
--------d-214413BXFFFF-----------------------
INT 21 U - NewSpace - GET ???
        AX = 4413h
        BX = FFFFh
Return: AX = code segment of NewRes (resident driver for NewSpace)
        BX = offset of ???
SeeAlso: AX=4412h/BX=FFFFh
--------O-214414-----------------------------
INT 21 OU - DR DOS 5.0-6.0 - SET GLOBAL PASSWORD
        AX = 4414h
        DS:DX -> password string (blank-padded to 8 characters)
Desc:   Specify the master password for accessing files.
Note:   this obsolete call, which is no longer supported in Novell DOS 7, is
          identical to AX=4454h
SeeAlso: AX=4454h
--------d-214414BXFFFF-----------------------
INT 21 U - NewSpace - DEBUGGING DUMP
        AX = 4414h
        BX = FFFFh
Return: debugging dump written to X:\NEWSPACE.SMP
SeeAlso: AX=4413h/BX=FFFFh,AX=44FFh/BX=FFFFh
--------O-214416-----------------------------
INT 21 OU - DR DOS 5.0-6.0 - HISTORY BUFFER, SHARE, AND HILOAD CONTROL
        AX = 4416h to 4418h
Note:   these obsolete subfunctions (which are no longer supported in Novell
          DOS 7) are identical to AX=4456h through 4458h
SeeAlso: AX=4456h,AX=4457h,AX=4458h
--------O-214451-----------------------------
INT 21 - Concurrent DOS v3.2+ - INSTALLATION CHECK
        AX = 4451h
Return: CF set if not Concurrent DOS
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            AH = single-user/multiuser nature (see #01581)
                10h single-user
                    AL = operating system version ID (see #01580)
                14h multiuser
                    AL = operating system version ID (see #01579)
Notes:  as of Concurrent DOS/XM 5.0 (possibly earlier), the version is stored
          in the environment variable VER
        use this function if you are looking for multiuser capabilities,
          AX=4452h for single-user
        this function should never return the single-user values
SeeAlso: AX=4452h,AX=4459h

(Table 01579)
Values for Digital Research operating system version ID:
 32h    Concurrent PC DOS 3.2
 41h    Concurrent DOS 4.1
 50h    Concurrent DOS/XM 5.0 or Concurrent DOS/386 1.1
 60h    Concurrent DOS/XM 6.0 or Concurrent DOS/386 2.0
 62h    Concurrent DOS/XM 6.2 or Concurrent DOS/386 3.0
 66h    DR Multiuser DOS 5.1
 67h    Concurrent DOS 5.1
SeeAlso: #01581,#04023
--------O-214452-----------------------------
INT 21 - DR DOS 3.41+ - DETERMINE DOS TYPE/GET DR DOS VERSION
        AX = 4452h ("DR")
        CF set
Return: CF set if not DR DOS
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if DR DOS
            AX = version code
            AH = single-user/multiuser nature (see #01581)
                10h single-user
                    AL = operating system version ID (see #01580)
                14h multiuser
                    AL = operating system version ID (see #01579)
            DX modified (refer to note below)
Notes:  the DR DOS version is stored in the environment variable VER
        use this function if looking for single-user capabilities, AX=4451h
          if looking for multiuser; this call should never return multiuser
          values
        in DR DOS 3.41-6.0, DX=AX on return; for Novell DOS 7, DH=AH but DL=00h
          (reportedly, DH=00h when booting NWDOS7 from installation disks)
        Novell DOS 7 returns error code 0001h if SETVER x.255 is in effect for
          the calling program, or SETVER /G x.255 is in effect
SeeAlso: AX=4412h,AX=4451h,AX=4459h

(Table 01580)
Values for Digital Research operating system version ID:
 41h    DOS Plus 1.2
 60h    DOS Plus 2.0 or 2.1
 63h    DR DOS 3.41
 64h    DR DOS 3.42
 65h    DR DOS 5.0
 67h    DR DOS 6.0
 70h    PalmDOS
 71h    DR DOS 6.0 March 1993 "business update"
 72h    Novell DOS 7.0
 73h    OpenDOS 7.02
SeeAlso: #01579,#01581,#04023

Bitfields for CP/M type indicator:
Bit(s)  Description     (Table 01581)
 7-4    CPU type
        0000 = 8080
        0001 = 8086
 3-0    OS type
        0000 = CP/M
        0001 = MP/M
        0002 = CP/Net
        0004 = multiuser
SeeAlso: #01580
--------O-214454-----------------------------
INT 21 U - DR DOS 3.41+ - SET GLOBAL PASSWORD
        AX = 4454h
        DS:DX -> password string (blank-padded to 8 characters)
Desc:   Specify the master password for accessing files.
SeeAlso: AX=4303h,AX=4414h
--------O-214456-----------------------------
INT 21 U - DR DOS 5.0+ - HISTORY BUFFER CONTROL
        AX = 4456h
        DL = control flags (see #01582)
Return: AL = previous value of state flags (see #01583)
Note:   DR DOS 6.0 only checks bit 0 and ignores the rest of DL
SeeAlso: #01584

Bitfields for control flags:
Bit(s)  Description     (Table 01582)
 0      whose buffer: 0=application, 1=COMMAND.COM
---Novell DOS 7---
 1      toggle HISTORY usage
 2      toggle INSERT state
Note:   only one bit at a time may be used

Bitfields for state flags:
Bit(s)  Description     (Table 01583)
 0      HISTORY buffer enabled
 1      INSERT enabled
 2-5    unused
 7      whose buffer: 0=application, 1=COMMAND.COM
--------O-214457-----------------------------
INT 21 U - DR DOS 5.0-6.0 - SHARE/HILOAD CONTROL
        AX = 4457h
        DH = subfunction
            00h enable/disable SHARE
                DL = 00h disable
                   = 01h enable
                   else Return: AX = ???
            01h get HILOAD status
                Return: AX = status
                            0000h off
                            0001h on
            02h set HILOAD status
                DL = new state (00h off, 01h on)
                Return: AX = ???
            other
                Return: AX = ???
Note:   This was seen called by COMMAND.COM of DR DOS 6.0; it does not seem
          to be supported by Novell DOS 7
SeeAlso: AX=4457h/DX=FFFFh
--------O-214457DXFFFF-----------------------
INT 21 OU - DR DOS 6.0 - GET SHARE STATUS
        AX = 4457h
        DX = FFFFh
Return: AX = SHARE status
Note:   not supported by Novell DOS 7
SeeAlso: INT 2F/AX=1000h
--------O-214458-----------------------------
INT 21 U - DR DOS 5.0+ internal - GET POINTER TO INTERNAL VARIABLE TABLE
        AX = 4458h
Return: ES:BX -> internal variable table (see #01584,#01585)
        AX = ??? (0B50h for DR DOS 5.0, 0A56h for DR DOS 6.0, 0FE4h for
                  Novell DOS 7)
SeeAlso: AX=4452h

Format of DR DOS 5.0-6.0 internal variable table:
Offset  Size    Description     (Table 01584)
 00h    WORD    ???
 02h    WORD    segment of ???
 04h    WORD    offset within DOS data segment of history control structure
                  for COMMAND.COM history buffer (see #01586)
 06h    WORD    offset within DOS data segment of history control structure
                  for application history buffer (see #01586)
 08h    BYTE    initial history state flags (see #01583)
 09h  2 BYTEs   ???
 0Bh    WORD    KB of extended memory at startup
 0Dh    BYTE    number of far jump entry points
 0Eh    WORD    segment containing far jumps to DR DOS entry points (see #01587)
 10h    WORD    (only if kernel loaded in HMA) offset in HMA of first free HMA
                  memory block (see #01588) or 0000h if none; segment is FFFFh
 12h    WORD    pointer to segment of environment variables set in CONFIG,
                  or 0000h if already used
---DR DOS 6.0---
 14h    WORD    (only if kernel loaded in HMA) offset in HMA of first used HMA
                memory block (see #01588) or 0000h if none; segment is FFFFh
 16h  8 BYTEs   ???
 1Eh    WORD    offset in DOS data segment of full COUNTRY.SYS filename
 20h  8 BYTEs   ???
 28h    WORD    offset in DOS data segment of SHARE hook table
 2Ah  2 BYTEs   ???
 2Ch    WORD    offset in DOS data segment of far pointer to INT 2F/AX=1000h
                  handler
Notes:  the segment used for the DR DOS 6.0 CONFIG environment variables
          (excluding COMSPEC, VER and OS) is only useful for programs/drivers
          called from CONFIG.SYS. The word is set to zero later when the area
          is copied to the COMMAND.COM environment space.  This allows
          CONFIG.SYS to pass information to AUTOEXEC.BAT.
        the Novell DOS 7 KEYB uses offsets 10h,14h, and 2Ch in the same was
          as for DR DOS 6.0, so it is likely that the entire table is the same

Format of Novell DOS 7 internal variable table:
Offset  Size    Description     (Table 01585)
 00h    ???
 1Eh    WORD    offset of COUNTRY.SYS filename
 42h 16 DWORDs  pointers to ??? entry points
        ???

Format of history control structure:
Offset  Size    Description     (Table 01586)
 00h    WORD    segment of buffer
 02h    WORD    size of buffer in bytes
 04h    WORD    ???

Format of kernel entry jump table for DR DOS 5.0-6.0:
Offset  Size    Description     (Table 01587)
 00h  5 BYTEs   far jump to kernel entry point for CP/M CALL 5
 05h  5 BYTEs   far jump to kernel entry point for INT 20
 0Ah  5 BYTEs   far jump to kernel entry point for INT 21
 0Fh  5 BYTEs   far jump to kernel entry point for INT 22 (RETF)
 14h  5 BYTEs   far jump to kernel entry point for INT 23 (RETF)
 19h  5 BYTEs   far jump to kernel entry point for INT 24
 1Eh  5 BYTEs   far jump to kernel entry point for INT 25
 23h  5 BYTEs   far jump to kernel entry point for INT 26
 28h  5 BYTEs   far jump to kernel entry point for INT 27
 2Dh  5 BYTEs   far jump to kernel entry point for INT 28
 32h  5 BYTEs   far jump to kernel entry point for INT 2A (IRET)
 37h  5 BYTEs   far jump to kernel entry point for INT 2B (IRET)
 3Ch  5 BYTEs   far jump to kernel entry point for INT 2C (IRET)
 41h  5 BYTEs   far jump to kernel entry point for INT 2D (IRET)
 46h  5 BYTEs   far jump to kernel entry point for INT 2E (IRET)
 4Bh  5 BYTEs   far jump to kernel entry point for INT 2F
Notes:  all of these entry points are indirected through this jump table
          to allow the kernel to be relocated into high memory while leaving
          the actual entry addresses in low memory for maximum compatibility
        some of these entry points (22h,23h,24h,2Eh,2Fh) are replaced as soon
          as COMMAND.COM is loaded, and return immediately to the caller, some
          returning an error code (the original handler for INT 2F returns
          AL=03h [fail]).

Format of HMA Memory Block (DR DOS 6.0 kernel loaded in HMA):
Offset  Size    Description     (Table 01588)
 00h    WORD    offset of next HMA Memory Block (0000h if last block)
 02h    WORD    size of this block in bytes (at least 10h)
 04h    BYTE    type of HMA Memory Block (interpreted by MEM)
                00h system
                01h KEYB
                02h NLSFUNC
                03h SHARE
                04h TaskMAX
                05h COMMAND
 05h    var     TSR (or system) code and data. DR DOS TSR's, such as KEYB,
                  hooks interrupts using segment FFFEh instead FFFFh.
--------O-214459-----------------------------
INT 21 - DR Multiuser DOS 5.0 - API
        AX = 4459h
        CL = function (see #04019 at INT E0"CP/M-86")
        DS,DX = parameters
Notes:  DR DOS 5.0 and Novell DOS 7 return CF set and AX=0001h
        this API is also available on INT E0
SeeAlso: AX=4452h,INT E0"CP/M-86"
--------v-2144A0-----------------------------
INT 21 - VIRUS - "Horns" - INSTALLATION CHECK
        AX = 44A0h
Return: AH = FFh if installed
SeeAlso: AX=4243h"VIRUS",AX=4B04h"VIRUS"
--------N-2144E0-----------------------------
INT 21 U - Sun PC-NFS - API???
        AX = 44E0h
        DS:DX -> ???
        SS:BP -> stack frame (see #01589)
Return: ???
Note:   this function is also supported by Beame&Whiteside's BWPCNFS shim; the
          description presented here was derived from that shim

Format of PC-NFS stack frame:
Offset  Size    Description     (Table 01589)
 00h    WORD    -> previous stack frame
 02h    DWORD   return address
--------d-2144FFBXFFFF-----------------------
INT 21 U - NewSpace - ???
        AX = 44FFh
        BX = FFFFh
        DX = ???
Program: NewSpace is a TSR by Isogon Corporation which automatically compresses
          all files as they are written and decompresses them as they are read
SeeAlso: AX=4414h/BX=FFFFh
--------D-2145-------------------------------
INT 21 - DOS 2+ - "DUP" - DUPLICATE FILE HANDLE
        AH = 45h
        BX = file handle
Return: CF clear if successful
            AX = new handle
        CF set on error
            AX = error code (04h,06h) (see #01680 at AH=59h/BX=0000h)
Notes:  moving file pointer for either handle will also move it for the other,
          because both will refer to the same system file table
        for DOS versions prior to 3.3, file writes may be forced to disk by
          duplicating the file handle and closing the duplicate
SeeAlso: AH=3Dh,AH=46h
--------D-2146-------------------------------
INT 21 - DOS 2+ - "DUP2", "FORCEDUP" - FORCE DUPLICATE FILE HANDLE
        AH = 46h
        BX = file handle
        CX = file handle to become duplicate of first handle
Return: CF clear if successful
        CF set on error
            AX = error code (04h,06h) (see #01680 at AH=59h/BX=0000h)
Notes:  closes file with handle CX if it is still open
        DOS 3.30 hangs if BX=CX on entry
        moving file pointer for either handle will also move it for the other,
          because both will refer to the same system file table
SeeAlso: AH=3Dh,AH=45h
--------D-2147-------------------------------
INT 21 - DOS 2+ - "CWD" - GET CURRENT DIRECTORY
        AH = 47h
        DL = drive number (00h = default, 01h = A:, etc)
        DS:SI -> 64-byte buffer for ASCIZ pathname
Return: CF clear if successful
            AX = 0100h (undocumented)
        CF set on error
            AX = error code (0Fh) (see #01680 at AH=59h/BX=0000h)
Notes:  the returned path does not include a drive or the initial backslash
        many Microsoft products for Windows rely on AX being 0100h on success
        under the FlashTek X-32 DOS extender, the buffer pointer is in DS:ESI
SeeAlso: AH=19h,AH=3Bh,AH=71h,INT 15/AX=DE25h
--------D-2148-------------------------------
INT 21 - DOS 2+ - ALLOCATE MEMORY
        AH = 48h
        BX = number of paragraphs to allocate
Return: CF clear if successful
            AX = segment of allocated block
        CF set on error
            AX = error code (07h,08h) (see #01680 at AH=59h/BX=0000h)
            BX = size of largest available block
Notes:  DOS 2.1-6.0 coalesces free blocks while scanning for a block to
          allocate
        .COM programs are initially allocated the largest available memory
          block, and should free some memory with AH=49h before attempting any
          allocations
        under the FlashTek X-32 DOS extender, EBX contains a protected-mode
          near pointer to the allocated block on a successful return
SeeAlso: AH=49h,AH=4Ah,AH=58h,AH=83h
--------D-2149-------------------------------
INT 21 - DOS 2+ - FREE MEMORY
        AH = 49h
        ES = segment of block to free
Return: CF clear if successful
        CF set on error
            AX = error code (07h,09h) (see #01680 at AH=59h/BX=0000h)
Notes:  apparently never returns an error 07h, despite official docs; DOS 2.1+
          code contains only an error 09h exit
        DOS 2.1-6.0 does not coalesce adjacent free blocks when a block is
          freed, only when a block is allocated or resized
        the code for this function is identical in DOS 2.1-6.0 except for
          calls to start/end a critical section in DOS 3.0+
SeeAlso: AH=48h,AH=4Ah
--------D-214A-------------------------------
INT 21 - DOS 2+ - RESIZE MEMORY BLOCK
        AH = 4Ah
        BX = new size in paragraphs
        ES = segment of block to resize
Return: CF clear if successful
        CF set on error
            AX = error code (07h,08h,09h) (see #01680 at AH=59h/BX=0000h)
            BX = maximum paragraphs available for specified memory block
Notes:  under DOS 2.1-6.0, if there is insufficient memory to expand the block
          as much as requested, the block will be made as large as possible
        DOS 2.1-6.0 coalesces any free blocks immediately following the block
          to be resized
SeeAlso: AH=48h,AH=49h,AH=83h
--------v-214A--BX00B6-----------------------
INT 21 - VIRUS???
        AH = 4Ah
        BX = 00B6h
        ES = CX
Return: ???
Note:   this call is intercepted by the Search&Destroy SDRes v27.03 bundled
          with Novell DOS 7, and is presumably some virus's installation check
SeeAlso: AH=0Eh/DL=ADh,AH=4Ah/BX=FFFFh,AH=D2h"VIRUS"
--------v-214A--BXFFFF-----------------------
INT 21 - VIRUS???
        AH = 4Ah
        BX = FFFFh
        CX = 0568h
        SI = 0129h
        DI = 0000h
        ES = BP
Return: ???
Note:   this call is intercepted by the Search&Destroy SDRes v27.03 bundled
          with Novell DOS 7, and is presumably some virus's installation check
SeeAlso: AH=0Eh/DL=ADh,AH=4Ah/BX=00B6h
--------D-214B-------------------------------
INT 21 - DOS 2+ - "EXEC" - LOAD AND/OR EXECUTE PROGRAM
        AH = 4Bh
        AL = type of load
            00h load and execute
            01h load but do not execute
            03h load overlay (see #01591)
            04h load and execute in background (European MS-DOS 4.0 only)
                "Exec & Go" (see also AH=80h)
        DS:DX -> ASCIZ program name (must include extension)
        ES:BX -> parameter block (see #01590,#01591,#01592)
        CX = mode (subfunction 04h only)
                0000h child placed in zombie mode after termination
                0001h child's return code discarded on termination
Return: CF clear if successful
            BX,DX destroyed
            if subfunction 01h, process ID set to new program's PSP; get with
                INT 21/AH=62h
        CF set on error
            AX = error code (01h,02h,05h,08h,0Ah,0Bh) (see #01680 at AH=59h)
Notes:  DOS 2.x destroys all registers, including SS:SP
        under ROM-based DOS, if no disk path characters (colons or slashes)
          are included in the program name, the name is searched for in the
          ROM module headers (see #01595) before searching on disk
        for functions 00h and 01h, the calling process must ensure that there
          is enough unallocated memory available; if necessary, by releasing
          memory with AH=49h or AH=4Ah
        for function 01h, the AX value to be passed to the child program is put
          on top of the child's stack
        for function 03h, DOS assumes that the overlay is being loaded into
          memory allocated by the caller
        function 01h was undocumented prior to the release of DOS 5.0
        some versions (such as DR DOS 6.0) check the parameters and parameter
          block and return an error if an invalid value (such as an offset of
          FFFFh) is found
        background programs under European MS-DOS 4.0 must use the new
          executable format
        this function ignores the filename extension, instead checking the
          first two bytes of the file to determine whether there is a valid
          .EXE header (see #01594); if not, the file is assumed to be in .COM
          format.  If present, the file may be in any of several formats which
          are extensions of the original .EXE format (see #01593)
        .COM-format executables begin running with the following register
          values:
                AL = 00h if first FCB has valid drive letter, FFh if not
                AH = 00h if second FCB has valid drive letter, FFh if not
                CS,DS,ES,SS = PSP segment
                SP = offset of last word available in first 64K segment
                (note: AX is always 0000h under DESQview)
        old-format executables begin running with the following register
          values:
                AL = 00h if first FCB has valid drive letter, FFh if not
                AH = 00h if second FCB has valid drive letter, FFh if not
                DS,ES = PSP segment
                SS:SP as defined in .EXE header
                (note: AX is always 0000h under DESQview)
        new executables begin running with the following register values
                AX = environment segment
                BX = offset of command tail in environment segment
                CX = size of automatic data segment (0000h = 64K)
                ES,BP = 0000h
                DS = automatic data segment
                SS:SP = initial stack
          the command tail corresponds to an old executable's PSP:0081h and
          following, except that the 0Dh is turned into a NUL (00h); new
          format executables have no PSP
        under the FlashTek X-32 DOS extender, only function 00h is supported
          and the pointers are passed in DS:EDX and ES:EBX
        DR DOS 6 always loads .EXE-format programs with no fixups and
          .COM-format programs starting with 9Ch 55h (PUSHF/PUSH BP) above the
          64K mark to avoid the EXEPACK bug, by extending the memory block
          containing the program's environment; this code is disabled if the
          name of the parent program as stored in the MCB is 'WIN'.
        DR DOS 3.41 and 5.0 check for a valid filename before testing the
          subfunction number, so the otherwise invalid subfunction 02h will
          only return error code 01h if the given filename actually exists;
          otherwise, errors 02h, 03h, or 05h are returned
BUGS:   DOS 2.00 assumes that DS points at the current program's PSP
        Load Overlay (subfunction 03h) loads up to 512 bytes too many if the
          file contains additional data after the actual overlay
        Load but Do Not Execute (subfunction 01h) is reported to corrupt the
          top word of the caller's stack if the loaded module terminates with
          INT 21/AH=4Ch in some versions of MS-DOS, including v5.00.
SeeAlso: AX=4B05h,AH=4Ch,AH=4Dh,AH=64h/BX=0025h,AH=8Ah,INT 2E,INT 60/DI=0604h

Format of EXEC parameter block for AL=00h,01h,04h:
Offset  Size    Description     (Table 01590)
 00h    WORD    segment of environment to copy for child process (copy caller's
                  environment if 0000h)
 02h    DWORD   pointer to command tail to be copied into child's PSP
 06h    DWORD   pointer to first FCB to be copied into child's PSP
 0Ah    DWORD   pointer to second FCB to be copied into child's PSP
 0Eh    DWORD   (AL=01h) will hold subprogram's initial SS:SP on return
 12h    DWORD   (AL=01h) will hold entry point (CS:IP) on return
SeeAlso: #01591,#01592

Format of EXEC parameter block for AL=03h:
Offset  Size    Description     (Table 01591)
 00h    WORD    segment at which to load overlay
 02h    WORD    relocation factor to apply to overlay if in .EXE format
SeeAlso: #01590,#01592

Format of EXEC parameter block for FlashTek X-32:
Offset  Size    Description     (Table 01592)
 00h    PWORD   48-bit far pointer to environment string
 06h    PWORD   48-bit far pointer to command tail string
SeeAlso: #01590,#01591

(Table 01593)
Values for the executable types understood by various environments:
 MZ     old-style DOS executable (see #01594)
 NE     Windows or OS/2 1.x segmented ("new") executable (see #01596)
 LE     Windows virtual device driver (VxD) linear executable (see #01609)
 LX     variant of LE used in OS/2 2.x (see #01609)
 W3     Windows WIN386.EXE file; a collection of LE files
 W4     Windows95 VMM32.VXD file
 PE     Win32 (Windows NT and Win32s) portable executable based on Unix COFF
 DL     HP 100LX/200LX system manager compliant executable (.EXM)
 MP     old PharLap .EXP (see #01619)
 P2     PharLap 286 .EXP (see #01620)
 P3     PharLap 386 .EXP (see #01620)

Format of .EXE file header:
Offset  Size    Description     (Table 01594)
 00h  2 BYTEs   .EXE signature, either "MZ" or "ZM" (5A4Dh or 4D5Ah)
                  (see also #01593)
 02h    WORD    number of bytes in last 512-byte page of executable
 04h    WORD    total number of 512-byte pages in executable (includes any
                partial last page)
 06h    WORD    number of relocation entries
 08h    WORD    header size in paragraphs
 0Ah    WORD    minimum paragraphs of memory required to allocate in addition
                  to executable's size
 0Ch    WORD    maximum paragraphs to allocate in addition to executable's size
 0Eh    WORD    initial SS relative to start of executable
 10h    WORD    initial SP
 12h    WORD    checksum (one's complement of sum of all words in executable)
 14h    DWORD   initial CS:IP relative to start of executable
 18h    WORD    offset within header of relocation table
                40h or greater for new-format (NE,LE,LX,W3,PE,etc.) executable
 1Ah    WORD    overlay number (normally 0000h = main program)
---new executable---
 1Ch  4 BYTEs   ???
 20h    WORD    behavior bits
 22h 26 BYTEs   reserved for additional behavior info
 3Ch    DWORD   offset of new executable (NE,LE,etc) header within disk file,
                or 00000000h if plain MZ executable
---Borland TLINK---
 1Ch  2 BYTEs   ??? (apparently always 01h 00h)
 1Eh    BYTE    signature FBh
 1Fh    BYTE    TLINK version (major in high nybble, minor in low nybble)
 20h  2 BYTEs   ??? (v2.0 apparently always 72h 6Ah, v3.0+ seems always 6Ah 72h)
---ARJ self-extracting archive---
 1Ch  4 BYTEs   signature "RJSX" (older versions, new signature is "aRJsfX" in
                the first 1000 bytes of the file)
---LZEXE 0.90 compressed executable---
 1Ch  4 BYTEs   signature "LZ09"
---LZEXE 0.91 compressed executable---
 1Ch  4 BYTEs   signature "LZ91"
---PKLITE compressed executable---
 1Ch    BYTE    minor version number
 1Dh    BYTE    bits 0-3: major version
                bit 4: extra compression
                bit 5: huge (multi-segment) file
 1Eh  6 BYTEs   signature "PKLITE" (followed by copyright message)
---LHarc 1.x self-extracting archive---
 1Ch  4 BYTEs   unused???
 20h  3 BYTEs   jump to start of extraction code
 23h  2 BYTEs   ???
 25h 12 BYTEs   signature "LHarc's SFX "
---LHA 2.x self-extracting archive---
 1Ch  8 BYTEs   ???
 24h 10 BYTEs   signature "LHa's SFX " (v2.10) or "LHA's SFX " (v2.13)
---TopSpeed C 3.0 CRUNCH compressed file---
 1Ch    DWORD   018A0001h
 20h    WORD    1565h
---PKARCK 3.5 self-extracting archive---
 1Ch    DWORD   00020001h
 20h    WORD    0700h
---BSA (Soviet archiver) self-extracting archive---
 1Ch    WORD    000Fh
 1Eh    BYTE    A7h
---LARC self-extracting archive---
 1Ch  4 BYTEs   ???
 20h 11 BYTEs   "SFX by LARC "
---LH self-extracting archive---
 1Ch  8 BYTEs   ???
 24h  8 BYTEs   "LH's SFX "
---RAR self-extracting archive---
 1Ch  4 BYTEs   signature "RSFX"
---other linkers---
 1Ch    var     optional information
---
  N   N DWORDs  relocation items
                each is the segment:offset from start of load image at which
                  to add the actual load segment to the indicated WORD
Notes:  if the word at offset 02h is 4, it should be treated as 00h, since
          pre-1.10 versions of the MS linker set it that way
        if both minimum and maximum allocation (offset 0Ah/0Ch) are zero, the
          program is loaded as high in memory as possible (DOS only checks
          the maximum allocation, however)
        the maximum allocation is set to FFFFh by default
        additional data may be contained in the file beyond the end of the
          load image described by the .EXE header; this data may be overlays,
          the actual executable for newer-format executables, or debugging
          information (see #01600,#01624)
        relocations entries need not be in any particular order, although they
          are typically stored in order from beginning to end of the load
          image
SeeAlso: #01596

Format of ROM Module Header:
Offset  Size    Description     (Table 01595)
 00h  2 BYTEs   ROM signature 55h, AAh
 02h    BYTE    size of ROM in 512-byte blocks
 03h  3 BYTEs   POST initialization entry point (near JMP instruction)
 06h    ROM Program Name List [array]
        Offset  Size    Description
         00h    BYTE    length of ROM program's name (00h if end of name list)
         01h  N BYTEs   program name
         N+1  3 BYTEs   program entry point (near JMP instruction)

Format of new executable header:
Offset  Size    Description     (Table 01596)
 00h  2 BYTEs   "NE" (4Eh 45h) signature
 02h  2 BYTEs   linker version (major, then minor)
 04h    WORD    offset from start of this header to entry table (see #01603)
 06h    WORD    length of entry table in bytes
 08h    DWORD   file load CRC (0 in Borland's TPW)
 0Ch    BYTE    program flags (see #01597)
 0Dh    BYTE    application flags (see #01598)
 0Eh    WORD    auto data segment index
 10h    WORD    initial local heap size
 12h    WORD    initial stack size (added to data seg, 0000h if SS <> DS)
 14h    DWORD   program entry point (CS:IP), "CS" is index into segment table
 18h    DWORD   initial stack pointer (SS:SP), "SS" is segment index
                if SS=automatic data segment and SP=0000h, the stack pointer is
                  set to the top of the automatic data segment, just below the
                  local heap
 1Ch    WORD    segment count
 1Eh    WORD    module reference count
 20h    WORD    length of nonresident names table in bytes
 22h    WORD    offset from start of this header to segment table (see #01601)
 24h    WORD    offset from start of this header to resource table
 26h    WORD    offset from start of this header to resident names table
 28h    WORD    offset from start of this header to module reference table
 2Ah    WORD    offset from start of this header to imported names table
                (array of counted strings, terminated with a string of length
                  00h)
 2Ch    DWORD   offset from start of file to nonresident names table
 30h    WORD    count of moveable entry point listed in entry table
 32h    WORD    file alignment size shift count
                0 is equivalent to 9 (default 512-byte pages)
 34h    WORD    number of resource table entries
 36h    BYTE    target operating system
                00h unknown
                01h OS/2
                02h Windows
                03h European MS-DOS 4.x
                04h Windows 386
                05h BOSS (Borland Operating System Services)
                81h PharLap 286|DOS-Extender, OS/2
                82h PharLap 286|DOS-Extender, Windows
 37h    BYTE    other EXE flags (see #01599)
 38h    WORD    offset to return thunks or start of gangload area
 3Ah    WORD    offset to segment reference thunks or length of gangload area
 3Ch    WORD    minimum code swap area size
 3Eh  2 BYTEs   expected Windows version (minor version first)
Note:   this header is documented in detail in the Windows 3.1 SDK Programmer's
          Reference, Vol 4.
SeeAlso: #01594

Bitfields for new executable program flags:
Bit(s)  Description     (Table 01597)
 0-1    DGROUP type
          0 = none
          1 = single shared
          2 = multiple (unshared)
          3 = (null)
 2      global initialization
 3      protected mode only
 4      8086 instructions
 5      80286 instructions
 6      80386 instructions
 7      80x87 instructions

Bitfields for new executable application flags:
Bit(s)  Description     (Table 01598)
 0-2    application type
        001 full screen (not aware of Windows/P.M. API)
        010 compatible with Windows/P.M. API
        011 uses Windows/P.M. API
 3      is a Family Application (OS/2)
 5      0=executable, 1=errors in image
 6      non-conforming program (valid stack is not maintained)
 7      DLL or driver rather than application
        (SS:SP info invalid, CS:IP points at FAR init routine called with
          AX=module handle which returns AX=0000h on failure, AX nonzero on
          successful initialization)

Bitfields for other new .EXE flags:
Bit(s)  Description     (Table 01599)
 0      supports long filenames
 1      2.X protected mode
 2      2.X proportional font
 3      gangload area

Format of Codeview trailer (at end of executable):
Offset  Size    Description     (Table 01600)
 00h    WORD    signature 4E42h ('NB')
 02h    WORD    Microsoft debug info version number
 04h    DWORD   Codeview header offset
SeeAlso: #01624

Format of new executable segment table record:
Offset  Size    Description     (Table 01601)
 00h    WORD    offset in file (shift left by alignment shift to get byte offs)
 02h    WORD    length of image in file (0000h = 64K)
 04h    WORD    segment attributes (see #01602)
 06h    WORD    number of bytes to allocate for segment (0000h = 64K)
Note:   the first segment table entry is entry number 1
SeeAlso: #01604

Bitfields for segment attributes:
Bit(s)  Description     (Table 01602)
 0      data segment rather than code segment
 1      unused???
 2      real mode
 3      iterated
 4      movable
 5      sharable
 6      preloaded rather than demand-loaded
 7      execute-only (code) or read-only (data)
 8      relocations (directly following code for this segment)
 9      debug info present
 10,11  80286 DPL bits
 12     discardable
 13-15  discard priority

Format of new executable entry table item (list):
Offset  Size    Description     (Table 01603)
 00h    BYTE    number of entry points (00h if end of entry table list)
 01h    BYTE    segment number (00h if end of entry table list)
 02h 3N BYTEs   entry records
                Offset  Size    Description
                 00h    BYTE    flags
                                bit 0: exported
                                bit 1: single data
                                bits 2-7: unused???
                 01h    WORD    offset within segment

Format of new executable relocation data (immediately follows segment image):
Offset  Size    Description     (Table 01604)
 00h    WORD    number of relocation items
 02h 8N BYTEs   relocation items
                Offset  Size    Description
                 00h    BYTE    relocation type
                                00h LOBYTE
                                02h BASE
                                03h PTR
                                05h OFFS
                                0Bh PTR48
                                0Dh OFFS32
                 01h    BYTE    flags
                                bit 2: additive
                 02h    WORD    offset within segment
                 04h    WORD    target address segment
                 06h    WORD    target address offset
SeeAlso: #01601,#01605

Format of new executable resource data:
Offset  Size    Description     (Table 01605)
 00h    WORD    alignment shift count for resource data
 02h  N RECORDs resources
        Format of resource record:
        Offset  Size    Description
         00h    WORD    type ID
                        0000h if end of resource records
                        >= 8000h if integer type
                        else offset from start of resource table to type string
         02h    WORD    number of resources of this type
         04h    DWORD   reserved for runtime use
         08h  N Resources (see #01606)
Note:   resource type and name strings are stored immediately following the
          resource table, and are not null-terminated
SeeAlso: #01606

Format of new executable resource entry:
Offset  Size    Description     (Table 01606)
 00h    WORD    offset in alignment units from start of file to contents of
                the resource data
 02h    WORD    length of resource image in bytes
 04h    WORD    flags
                bit 4: moveable
                bit 5: shareable
                bit 6: preloaded
 06h    WORD    resource ID
                >= 8000h if integer resource
                else offset from start of resource table to resource string
 08h    DWORD   reserved for runtime use
Notes:  resource type and name strings are stored immediately following the
          resource table, and are not null-terminated
        strings are counted strings, with a string of length 0 indicating the
          end of the resource table
SeeAlso: #01605,#01607

Format of new executable module reference table [one bundle of entries]:
Offset  Size    Description     (Table 01607)
 00h    BYTE    number of records in this bundle (00h if end of table)
 01h    BYTE    segment indicator
                00h unused
                FFh movable segment, segment number is in entry
                else segment number of fixed segment
 02h  N RECORDs
        Format of segment record
        Offset  Size    Description
         00h    BYTE    flags
                        bit 0: entry is exported
                        bit 1: entry uses global (shared) data
                        bits 7-3: number of parameter words
        ---fixed segment---
         01h    WORD    offset
        ---moveable segment---
         01h  2 BYTEs   INT 3F instruction (CDh 3Fh)
         03h    BYTE    segment number
         05h    WORD    offset
Note:   table entries are numbered starting from 1
SeeAlso: #01608

Format of new executable resident/nonresident name table entry:
Offset  Size    Description     (Table 01608)
 00h    BYTE    length of string (00h if end of table)
 01h  N BYTEs   ASCII text of string
 N+1    WORD    ordinal number (index into entry table)
Notes:  the first string in the resident name table is the module name; the
          first entry in the nonresident name table is the module description
        the strings are case-sensitive; if the executable was linked with
          /IGNORECASE, all strings are in uppercase
SeeAlso: #01607

Format of Linear Executable (enhanced mode executable) header:
Offset  Size    Description     (Table 01609)
 00h  2 BYTEs   "LE" (4Ch 45h) signature (Windows)
                "LX" (4Ch 58h) signature (OS/2)
 02h    BYTE    byte order (00h = little-endian, nonzero = big-endian)
 03h    BYTE    word order (00h = little-endian, nonzero = big-endian)
 04h    DWORD   executable format level
 08h    WORD    CPU type (see also INT 15/AH=C9h)
                01h Intel 80286 or upwardly compatible
                02h Intel 80386 or upwardly compatible
                03h Intel 80486 or upwardly compatible
                04h Intel Pentium (80586) or upwardly compatible
                20h Intel i860 (N10) or compatible
                21h Intel "N11" or compatible
                40h MIPS Mark I (R2000, R3000) or compatible
                41h MIPS Mark II (R6000) or compatible
                42h MIPS Mark III (R4000) or compatible
 0Ah    WORD    target operating system
                01h OS/2
                02h Windows
                03h European DOS 4.0
                04h Windows 386
 0Ch    DWORD   module version
 10h    DWORD   module type (see #01610)
 14h    DWORD   number of memory pages
 18h    Initial CS:EIP
        DWORD   object number
        DWORD   offset
 20h    Initial SS:ESP
        DWORD   object number
        DWORD   offset
 28h    DWORD   memory page size
 2Ch    DWORD   (Windows LE) bytes on last page
                (OS/2 LX) page offset shift count
 30h    DWORD   fixup section size
 34h    DWORD   fixup section checksum
 38h    DWORD   loader section size
 3Ch    DWORD   loader section checksum
 40h    DWORD   offset of object table (see #01611)
 44h    DWORD   object table entries
 48h    DWORD   object page map table offset (see #01613)
 4Ch    DWORD   object iterate data map offset
 50h    DWORD   resource table offset
 54h    DWORD   resource table entries
 58h    DWORD   resident names table offset (see #01614)
 5Ch    DWORD   entry table offset (see #01615,#01616)
 60h    DWORD   module directives table offset
 64h    DWORD   Module Directives entries
 68h    DWORD   Fixup page table offset
 6Ch    DWORD   Fixup record table offset (see #01618)
 70h    DWORD   imported modules name table offset
 74h    DWORD   imported modules count
 78h    DWORD   imported procedures name table offset
 7Ch    DWORD   per-page checksum table offset
 80h    DWORD   data pages offset
 84h    DWORD   preload page count
 88h    DWORD   non-resident names table offset
 8Ch    DWORD   non-resident names table length
 90h    DWORD   non-resident names checksum
 94h    DWORD   automatic data object
 98h    DWORD   debug information offset
 9Ch    DWORD   debug information length
 A0h    DWORD   preload instance pages number
 A4h    DWORD   demand instance pages number
 A8h    DWORD   extra heap allocation
 ACh 12 BYTEs   reserved
 B8h    DWORD   offset of VERSIONINFO resource (MS-Windows VxD only)
 BCh    DWORD   pointer to ??? (dynamically-loadable VxDs only???)
 C0h    WORD    device ID (MS-Windows VxD only)
 C2h    WORD    DDK version (MS-Windows VxD only)
Note:   used by EMM386.EXE, QEMM, and Windows 3.0 Enhanced Mode drivers

Bitfields for Linear Executable module type:
Bit(s)  Description     (Table 01610)
 2      initialization (only for DLLs) 0 = global, 1 = per-process
 4      no internal fixups in executable image
 5      no external fixups in executable image
 8-10   API compatibility
        0 = unknown
        1 = incompatible with PM windowing \
        2 = compatible with PM windowing    > (only for
        3 = uses PM windowing API          /    programs)
 13     module not loadable (only for programs)
 15-17  module type
        000 program
        001 library (DLL)
        011 protected memory library module
        100 physical device driver
        110 virtual device driver
 30     per-process library termination
        (requires valid CS:EIP, can't be set for .EXE)

Format of object table entry:
Offset  Size    Description     (Table 01611)
 00h    DWORD   virtual size in bytes
 04h    DWORD   relocation base address
 08h    DWORD   object flags (see #01612)
 0Ch    DWORD   page map index
 10h    DWORD   page map entries (see #01613)
 14h  4 BYTEs   reserved??? (apparently always zeros)

Bitfields for object flags:
Bit(s)  Description     (Table 01612)
 0      readable
 1      writable
 2      executable
 3      resource
 4      discardable
 5      shared
 6      preloaded
 7      invalid
 8-9    type
        00 normal
        01 zero-filled
        10 resident
        11 resident and contiguous
 10     resident and long-lockable
 11     reserved
 12     16:16 alias required
 13     "BIG" (Huge: 32-bit)
 14     conforming
 15     "OBJECT_I/O_PRIVILEGE_LEVEL"
 16-31  reserved

Format of object page map table entry:
Offset  Size    Description     (Table 01613)
 00h    BYTE    ??? (usually 00h)
 01h    WORD    (big-endian) index to fixup table
                0000h if no relocation info
 03h    BYTE    type (00h hard copy in file, 03h some relocation needed)

Format of resident names table entry:
Offset  Size    Description     (Table 01614)
 00h    BYTE    length of name
 01h  N BYTEs   name
 N+1  3 BYTEs   ???

Format of LE linear executable entry table:
Offset  Size    Description     (Table 01615)
 00h    BYTE    number of entries in table
 01h 10 BYTEs per entry
                Offset  Size    Description
                 00h    BYTE    bit flags
                                bit 0: non-empty bundle
                                bit 1: 32-bit entry
                 01h    WORD    object number
                 03h    BYTE    entry type flags
                                bit 0: exported
                                bit 1: uses single data rather than instance
                                bit 2: reserved
                                bits 3-7: number of stack parameters
                 04h    DWORD   offset of entry point
                 08h  2 BYTEs   ???
Note:   empty bundles (bit flags at 00h = 00h) are used to skip unused indices,
          and do not contain the remaining nine bytes

Format of LX linear executable entry table [array]:
Offset  Size    Description     (Table 01616)
 00h    BYTE    number of bundles following (00h = end of entry table)
 01h    BYTE    bundle type
                00h empty
                01h 16-bit entry
                02h 286 callgate entry
                03h 32-bit entry
                04h forwarder entry
                bit 7 set if additional parameter typing information is present
---bundle type 00h---
 no additional fields
---bundle type 01h---
 02h    WORD    object number
 04h    BYTE    entry flags
                bit 0: exported
                bits 7-3: number of stack parameters
 05h    WORD    offset of entry point in object (shifted by page size shift)
---bundle type 02h---
 02h    WORD    object number
 04h    BYTE    entry flags
                bit 0: exported
                bits 7-3: number of stack parameters
 05h    WORD    offset of entry point in object
 07h    WORD    reserved for callgate selector (used by loader)
---bundle type 03h---
 02h    WORD    object number
 04h    BYTE    entry flags
                bit 0: exported
                bits 7-3: number of stack parameters
 05h    DWORD   offset of entry point in object
---bundle type 04h---
 02h    WORD    reserved
 04h    BYTE    forwarder flags
                bit 0: import by ordinal
                bits 7-1 reserved
 05h    WORD    module ordinal
                (forwarder's index into Import Module Name table)
 07h    DWORD   procedure name offset or import ordinal number
Note:   all fields after the first two bytes are repeated N times

Bitfields for linear executable fixup type:
Bit(s)  Description     (Table 01617)
 7      ordinal is BYTE rather than WORD
 6      16-rather than 8-object number/module ordinal
 5      addition with DWORD rather than WORD
 4      relocation info has size with new two bytes at end
 3      reserved (0)
 2      set if add to destination, clear to replace destination
 1-0    type
        00 internal fixup
        01 external fixup, imported by ordinal
        10 external fixup, imported by name
        11 internal fixup via entry table

Format of linear executable fixup record:
Offset  Size    Description     (Table 01618)
 00h    BYTE    type
                bits 7-4: modifier (0001 single, 0011 multiple)
                bits 3-0: type
                        0000 byte offset
                        0010 word segment
                        0011 16-bit far pointer (DWORD)
                        0101 16-bit offset
                        0110 32-bit far pointer (PWORD)
                        0111 32-bit offset
                        1000 near call or jump, WORD/DWORD based on seg attrib
 01h    BYTE    linear executable fixup type (see #01617)
---if single type---
 02h    WORD    offset within page
 04h    relocation information
        ---internal fixup---
        BYTE    object number
        ---external,ordinal---
        BYTE    one-based module number in Import Module table
        BYTE/WORD ordinal number
        WORD/DWORD value to add (only present if modifier bit 4 set)
        ---external,name---
        BYTE    one-based module number in Import Module table
        WORD    offset in Import Procedure names
        WORD/DWORD value to add (only present if modifier bit 4 set)
---if multiple type---
 02h    BYTE    number of items
 03h    var     relocation info as for "single" type (above)
      N WORDs   offsets of items to relocate

Format of old Phar Lap .EXP file header:
Offset  Size    Description     (Table 01619)
 00h  2 BYTEs   "MP" (4Dh 50h) signature
 02h    WORD    remainder of image size / page size (page size = 512h)
 04h    WORD    size of image in pages
 06h    WORD    number of relocation items
 08h    WORD    header size in paragraphs
 0Ah    WORD    minimum number of extra 4K pages to be allocated at the end
                  of program, when it is loaded
 0Ch    WORD    maximum number of extra 4K pages to be allocated at the end
                  of program, when it is loaded
 0Eh    DWORD   initial ESP
 12h    WORD    word checksum of file
 14h    DWORD   initial EIP
 18h    WORD    offset of first relocation item
 1Ah    WORD    overlay number
 1Ch    WORD    ??? (wants to be 1)
SeeAlso: #01620

Format of new Phar Lap .EXP file header:
Offset  Size    Description     (Table 01620)
 00h  2 BYTEs   signature ("P2" for 286 .EXP executable, "P3" for 386 .EXP)
 02h    WORD    level (01h flat-model file, 02h multisegmented file)
 04h    WORD    header size
 06h    DWORD   file size in bytes
 0Ah    WORD    checksum
 0Ch    DWORD   offset of run-time parameters within file (see #01622)
 10h    DWORD   size of run-time parameters in bytes
 14h    DWORD   offset of relocation table within file
 18h    DWORD   size of relocation table in bytes
 1Ch    DWORD   offset of segment information table within file (see #01621)
 20h    DWORD   size of segment information table in bytes
 24h    WORD    size of segment information table entry in bytes
 26h    DWORD   offset of load image within file
 2Ah    DWORD   size of load image on disk
 2Eh    DWORD   offset of symbol table within file or 00000000h
 32h    DWORD   size of symbol table in bytes
 36h    DWORD   offset of GDT within load image
 3Ah    DWORD   size of GDT in bytes
 3Eh    DWORD   offset of LDT within load image
 42h    DWORD   size of LDT in bytes
 46h    DWORD   offset of IDT within load image
 4Ah    DWORD   size of IDT in bytes
 4Eh    DWORD   offset of TSS within load image
 52h    DWORD   size of TSS in bytes
 56h    DWORD   minimum number of extra bytes to be allocated at end of program
                (level 1 executables only)
 5Ah    DWORD   maximum number of extra bytes to be allocated at end of program
                (level 1 executables only)
 5Eh    DWORD   base load offset (level 1 executables only)
 62h    DWORD   initial ESP
 66h    WORD    initial SS
 68h    DWORD   initial EIP
 6Ch    WORD    initial CS
 6Eh    WORD    initial LDT
 70h    WORD    initial TSS
 72h    WORD    flags
                bit 0: load image is packed
                bit 1: 32-bit checksum is present
                bits 4-2: type of relocation table
 74h    DWORD   memory requirements for load image
 78h    DWORD   32-bit checksum (optional)
 7Ch    DWORD   size of stack segment in bytes
 80h 256 BYTEs  reserved (0)
SeeAlso: #01619,#01623

Format of Phar Lap segment information table entry:
Offset  Size    Description     (Table 01621)
 00h    WORD    selector number
 02h    WORD    flags
 04h    DWORD   base offset of selector
 08h    DWORD   minimum number of extra bytes to be allocated to the segment

Format of 386|DOS-Extender run-time parameters:
Offset  Size    Description     (Table 01622)
 00h  2 BYTEs   signature "DX" (44h 58h)
 02h    WORD    minimum number of real-mode params to leave free at run time
 04h    WORD    maximum number of real-mode params to leave free at run time
 06h    WORD    minimum interrupt buffer size in KB
 08h    WORD    maximum interrupt buffer size in KB
 0Ah    WORD    number of interrupt stacks
 0Ch    WORD    size in KB of each interrupt stack
 0Eh    DWORD   offset of byte past end of real-mode code and data
 12h    WORD    size in KB of call buffers
 14h    WORD    flags
                bit 0: file is virtual memory manager
                bit 1: file is a debugger
 16h    WORD    unprivileged flag (if nonzero, executes at ring 1, 2, or 3)
 18h 104 BYTEs  reserved (0)

Format of Phar Lap repeat block header:
Offset  Size    Description     (Table 01623)
 00h    WORD    byte count
 02h    BYTE    repeat string length

Format of Borland debugging information header (following load image):
Offset  Size    Description     (Table 01624)
 00h    WORD    signature 52FBh
 02h    WORD    version ID
 04h    DWORD   size of name pool in bytes
 08h    WORD    number of names in name pool
 0Ah    WORD    number of type entries
 0Ch    WORD    number of structure members
 0Eh    WORD    number of symbols
 10h    WORD    number of global symbols
 12h    WORD    number of modules
 14h    WORD    number of locals (optional)
 16h    WORD    number of scopes in table
 18h    WORD    number of line-number entries
 1Ah    WORD    number of include files
 1Ch    WORD    number of segment records
 1Eh    WORD    number of segment/file correlations
 20h    DWORD   size of load image after removing uninitialized data and debug
                  information
 24h    DWORD   debugger hook; pointer into debugged program whose meaning
                  depends on program flags
 28h    BYTE    program flags
                bit 0: case-sensitive link
                bit 1: pascal overlay program
 29h    WORD    no longer used
 2Bh    WORD    size of data pool in bytes
 2Dh    BYTE    padding
 2Eh    WORD    size of following header extension (currently 00h, 10h, or 20h)
 30h    WORD    number of classes
 32h    WORD    number of parents
 34h    WORD    number of global classes (currently unused)
 36h    WORD    number of overloads (currently unused)
 38h    WORD    number of scope classes
 3Ah    WORD    number of module classes
 3Ch    WORD    number of coverage offsets
 3Eh    DWORD   offset relative to symbol base of name pool
 42h    WORD    number of browser information records
 44h    WORD    number of optimized symbol records
 46h    WORD    debugging flags
 48h  8 BYTEs   padding
Note:   additional information on the Borland debugging info may be found in
          Borland's Open Architecture Handbook
SeeAlso: #01600
--------U-214B-------------------------------
INT 21 - ELRES v1.0 only - INSTALLATION CHECK
        AH = 4Bh
        DS:DX = 0000h:0000h
Return: ES:BX -> ELRES history structure (see #01381 at AH=2Bh/CX=454Ch)
        DX = DABEh (signature, DAve BEnnett)
Program: ELRES is an MS-DOS return code (errorlevel) recorder by David H.
          Bennett
SeeAlso: AH=2Bh/CX=454Ch
--------v-214B04-----------------------------
INT 21 - VIRUS - "MG", "699"/"Thirteen Minutes" - INSTALLATION CHECK
        AX = 4B04h
Return: CF clear if "MG" resident
        AX = 044Bh if "699"/"Thirteen Minutes" resident
SeeAlso: AX=4243h,AH=4Ah/BX=FFFFh,AX=4B21h
--------D-214B05-----------------------------
INT 21 - DOS 5+ - SET EXECUTION STATE
        AX = 4B05h
        DS:DX -> execution state structure (see #01625)
Return: CF clear if successful
            AX = 0000h
        CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
Note:   used by programs which intercept AX=4B00h to prepare new programs for
          execution (including setting the DOS version number).  No DOS, BIOS
          or other software interrupt may be called after return from this call
          before commencement of the child process.  If DOS is running in the
          HMA, A20 is turned off on return from this call.
SeeAlso: AH=4Bh

Format of execution state structure:
Offset  Size    Description     (Table 01625)
 00h    WORD    reserved (00h)
 02h    WORD    type flags
                bit 0: program is an .EXE
                bit 1: program is an overlay
 04h    DWORD   pointer to ASCIZ name of program file
 08h    WORD    PSP segment of new program
 0Ah    DWORD   starting CS:IP of new program
 0Eh    DWORD   program size including PSP
----------214B18DX0010-----------------------
INT 21 U - FBOOT v2.13 - PERFORM FAST BOOTSTRAP
        AX = 4B18h
        DX = 0010h
        BX = disk selector
            0000h boot from floppy
            0080h boot from hard disk
Return: never if FastBoot installed
Program: CyberWare FastBoot allows fast warm boots by skipping CMOS
          checking, ROM scan, RAM & peripheral components test
InstallCheck:   search for a character device driver called "FBOOT$$$"
--------v-214B20-----------------------------
INT 21 - VIRUS - "Holocaust"/"Telefonica" - ???
        AX = 4B20h
SeeAlso: AX=4B04h,AX=4B21h
--------v-214B21-----------------------------
INT 21 C - VIRUS - "Holocaust"/"Telefonica" - ???
        AX = 4B21h
Note:   called at completion of virus installation
SeeAlso: AX=4B04h,AX=4B20h,AX=4B25h
--------v-214B25-----------------------------
INT 21 - VIRUS - "1063"/"Mono" - INSTALLATION CHECK
        AX = 4B25h
Return: DI = 1234h if resident
SeeAlso: AX=4B21h,AX=4B40h
--------v-214B40-----------------------------
INT 21 - VIRUS - "Plastique"/"AntiCad" - INSTALLATION CHECK
        AX = 4B40h
Return: AX = 5678h if resident
SeeAlso: AX=4B25h,AX=4B41h,AX=4B4Ah
--------v-214B41-----------------------------
INT 21 - VIRUS - "Plastique"/"AntiCad" - ???
        AX = 4B41h
        ???
Return: ???
SeeAlso: AX=4B40h
--------v-214B4A-----------------------------
INT 21 - VIRUS - "Jabberwocky" - INSTALLATION CHECK
        AX = 4B4Ah
Return: AL = 57h if resident
SeeAlso: AX=4B40h,AX=4B4Bh
--------v-214B4B-----------------------------
INT 21 - VIRUS - "Horse-2" - INSTALLATION CHECK
        AX = 4B4Bh
Return: CF clear if resident
SeeAlso: AX=4B4Ah,AX=4B4Dh
--------v-214B4D-----------------------------
INT 21 - VIRUS - "Murphy-2", "Patricia"/"Smack" - INSTALLATION CHECK
        AX = 4B4Dh
Return: CF clear if resident
SeeAlso: AX=4B4Ah,AX=4B50h
--------v-214B50-----------------------------
INT 21 - VIRUS - "Plastique-2576"/"AntiCad-2576" - INSTALLATION CHECK
        AX = 4B50h
Return: AX = 1234h if resident
SeeAlso: AX=4B4Dh,AX=4B53h,AX=4B60h
--------v-214B53-----------------------------
INT 21 - VIRUS - "Horse" - INSTALLATION CHECK
        AX = 4B53h
Return: CF clear if resident
SeeAlso: AX=4B50h,AX=4B53h/BX=2121h,AX=4B55h
--------v-214B53BX2121-----------------------
INT 21 - VIRUS - "One Half" - INSTALLATION CHECK
        AX = 4B53h
        BX = 2121h
        CX = 1212h
        DX = 0236h
Return: AX = 454Bh if installed
SeeAlso: AX=4B50h,AX=4B53h,AX=4B55h
--------v-214B55-----------------------------
INT 21 - VIRUS - "Sparse" - INSTALLATION CHECK
        AX = 4B55h
Return: AX = 1231h if resident
SeeAlso: AX=4B53h,AX=4B59h
--------v-214B59-----------------------------
INT 21 - VIRUS - "Murphy-1", "Murphy-4" - INSTALLATION CHECK
        AX = 4B59h
Return: CF clear if resident
SeeAlso: AX=4B50h,AX=4B5Eh
--------v-214B5E-----------------------------
INT 21 - VIRUS - "Brothers" - INSTALLATION CHECK
        AX = 4B5Eh
Return: CF clear if resident
SeeAlso: AX=4B59h,AX=4B87h
--------v-214B60-----------------------------
INT 21 - VIRUS - "Plastique-2576"/"AntiCad-2576" - ???
        AX = 4B60h
        ???
Return: ???
SeeAlso: AX=4B50h
--------O-214B80-----------------------------
INT 21 - DR DOS v3.41 - RUN ALREADY-LOADED KERNEL FILE
        AX = 4B80h
        DS:DX -> ASCIZ name of program to EXEC
        ES = segment of PSP for kernel file
Return: only if call failed
Note:   DR DOS uses this call after an AX=4B01h to load the kernel file into
          memory and patching the program's parent-PSP field to point at itself
SeeAlso: AH=4Bh"EXEC"
--------v-214B87-----------------------------
INT 21 - VIRUS - "Shirley" - INSTALLATION CHECK
        AX = 4B87h
Return: AX = 6663h if resident
SeeAlso: AX=4B5Eh,AX=4B95h
--------v-214B95-----------------------------
INT 21 - VIRUS - "Zherkov-1882" - INSTALLATION CHECK
        AX = 4B95h
Return: AX = 1973h if resident
SeeAlso: AX=4B87h,AX=4BA7h
--------v-214BA7-----------------------------
INT 21 - VIRUS - "1876"/"Dash-em" - INSTALLATION CHECK
        AX = 4BA7h
Return: AX = B459h if resident
SeeAlso: AX=4B95h,AX=4BAAh
--------v-214BAA-----------------------------
INT 21 - VIRUS - "Nomenklatura" - INSTALLATION CHECK
        AX = 4BAAh
Return: CF clear if resident
SeeAlso: AX=4BA7h,AX=4BAFh
--------v-214BAF-----------------------------
INT 21 - VIRUS - "948"/"Screenplus1", "Magnitogorsk" - INSTALLATION CHECK
        AX = 4BAFh
Return: AL = AFh if "Magnitogorsk" resident
        AL = FAh if "948"/"Screenplus1" resident
SeeAlso: AX=4BAAh,AX=4BB1h"VIRUS"
--------v-214BB1-----------------------------
INT 21 - VIRUS - "UZZY" -INSTALLATION CHECK
        AX = 4BB1h
Return: CL = 04h if resident
SeeAlso: AX=4BAFh"VIRUS",AX=4BDDh"VIRUS"
--------v-214BDD-----------------------------
INT 21 - VIRUS - "Lozinsky"/"Zherkov" - INSTALLATION CHECK
        AX = 4BDDh
Return: AX = 1234h
SeeAlso: AX=4BB1h"VIRUS",AX=4BFEh
--------v-214BEE-----------------------------
INT 21 - F-DRIVER.SYS v1.14+ - GRAB INT 21
        AX = 4BEEh
Return: AX = status
            1234h grab was successful
            2345h failed (INT 21 grabbed previously)
Program: F-DRIVER.SYS is part of the shareware F-PROT virus/trojan protection
          package by Fridrik Skulason
Note:   when called the first time, this function moves the INT 21 monitoring
          code from its original location in the INT 21 chain to be the first
          thing called by INT 21.  This is the mechanism used by F-NET.
SeeAlso: INT 2F/AX=4653h/CX=0002h,INT 2F/AX=4653h/CX=0007h
--------k-214BF0-----------------------------
INT 21 - DIET v1.10+ (Overlay Mode) - INSTALLATION CHECK
        AX = 4BF0h
Return: CF clear if installed
            AX = 899Dh
Program: DIET is an executable-compression program by Teddy Matsumoto
SeeAlso: AX=37D0h,AX=4BF1h
--------k-214BF1-----------------------------
INT 21 - DIET v1.10+ (Overlay Mode) - EXPAND PROGRAM???
        AX = 4BF1h
Return: ???
SeeAlso: AX=37D0h,AX=4BF0h
--------v-214BF1-----------------------------
INT 21 - VIRUS - "Jerusalem 2" - INSTALLATION CHECK
        AX = 4BF1h
Return: AX = 1FB4h if resident
SeeAlso: AH=3Fh/BX=FEB0h"VIRUS",AX=4BDDh"VIRUS",AX=4BFEh"VIRUS"
--------v-214BFE-----------------------------
INT 21 - VIRUS - "Hitchcock", "Dark Avenger-1028", "1193" - INSTALLATION CHECK
        AX = 4BFEh
Return: AX = 1234h if "Hitchcock" or "Storm" resident
        AX = ABCDh if "1193"/"Copyright" resident
        DI = 55BBh if "Dark Avenger-1028" resident
SeeAlso: AX=4BDDh,AX=4BF1h"VIRUS",AX=4BFFh"Justice"
--------v-214BFF-----------------------------
INT 21 - VIRUS - "USSR-707", "Justice", "Europe 92" - INSTALLATION CHECK
        AX = 4BFFh
Return: BL = FFh if "USSR-707" resident
        DI = 55AAh if "Justice" resident
        AX = 1234h if "Hitchcock.1238" resident
        CF clear if "Europe 92" resident
SeeAlso: AX=4BFEh,AX=4BFFh"Cascade",AX=5252h
--------v-214BFFSI0000-----------------------
INT 21 - VIRUS - "Cascade" - INSTALLATION CHECK
        AX = 4BFFh
        SI = 0000h
        DI = 0000h
Return: DI = 55AAh if installed
SeeAlso: AX=4BFFh"Justice",AX=5252h
--------D-214C-------------------------------
INT 21 - DOS 2+ - "EXIT" - TERMINATE WITH RETURN CODE
        AH = 4Ch
        AL = return code
Return: never returns
Notes:  unless the process is its own parent
          (see #01378 [offset 16h] at AH=26h), all open files are closed and
          all memory belonging to the process is freed
        all network file locks should be removed before calling this function
SeeAlso: AH=00h,AH=26h,AH=4Bh,AH=4Dh,INT 15/AH=12h/BH=02h,INT 20,INT 22
SeeAlso: INT 60/DI=0601h
--------m-214C57-----------------------------
INT 21 - Headroom - ???
        AX = 4C57h
        DS:DX -> target address
Note:   jumps to target address instead of terminating program
SeeAlso: AX=5758h
--------D-214D-------------------------------
INT 21 - DOS 2+ - GET RETURN CODE (ERRORLEVEL)
        AH = 4Dh
Return: AH = termination type
            00h normal (INT 20,INT 21/AH=00h, or INT 21/AH=4Ch)
            01h control-C abort
            02h critical error abort
            03h terminate and stay resident (INT 21/AH=31h or INT 27)
        AL = return code
        CF clear
Notes:  the word in which DOS stores the return code is cleared after being
          read by this function, so the return code can only be retrieved once
        COMMAND.COM stores the return code of the last external command it
          executed as ERRORLEVEL
        this call should not be used if the child was started with AX=4B04h;
          use AH=8Ah instead
        the following sequence will close a Virtual DOS Machine under OS/2 2.0
          through OS/2 Merlin (but may change in the future):
            MOV AH,4Dh
            INT 21h
            HLT
            DB  02h,0FDh
          This sequence is the only way to close a specific VDM which was
          booted from floppy or a disk image.
SeeAlso: AH=4Bh,AH=4Ch,AH=8Ah
--------D-214E-------------------------------
INT 21 - DOS 2+ - "FINDFIRST" - FIND FIRST MATCHING FILE
        AH = 4Eh
        AL = special flag for use by APPEND (refer to note below)
        CX = file attribute mask (see #01420 at AX=4301h) (bits 0 and 5 ignored)
            0088h (Novell DOS 7) find first deleted file
        DS:DX -> ASCIZ file specification (may include path and wildcards)
Return: CF clear if successful
            Disk Transfer Area filled with FindFirst data block (see #01626)
        CF set on error
            AX = error code (02h,03h,12h) (see #01680 at AH=59h/BX=0000h)
Notes:  for search attributes other than 08h, all files with at MOST the
          specified combination of hidden, system, and directory attributes
          will be returned.  Under DOS 2.x, searching for attribute 08h
          (volume label) will also return normal files, while under DOS 3.0+
          only the volume label (if any) will be returned.
        this call also returns successfully if given the name of a character
          device without wildcards.  DOS 2.x returns attribute 00h, size 0,
          and the current date and time.  DOS 3.0+ returns attribute 40h and
          the current date and time.
        immediately after an INT 2F/AX=B711h (APPEND return found name), the
          name at DS:DX will be overwritten; if AL=00h on entry, the actual
          found pathname will be stored, otherwise, the actual found path
          will be prepended to the original filespec without a path.
        under LANtastic, this call may be used to obtain a list of a server's
          shared resources by searching for "\\SERVER\*.*"; a list of printer
          resources may be obtained by searching for "\\SERVER\@*.*"
        under the FlashTek X-32 DOS extender, the filespec pointer is in DS:EDX
BUGS:   under DOS 3.x and 4.x, the second and subsequent calls to this function
          with a character device name (no wildcards) and search attributes
          which include the volume-label bit (08h) will fail unless there is
          an intervening DOS call which implicitly or explicity performs a
          directory search without the volume-label bit.  Such implicit
          searches are performed by CREATE (AH=3Ch), OPEN (AH=3Dh), UNLINK
          (AH=41h), and RENAME (AH=56h)
        DR DOS 3.41 and 5.0 return the Directory attribute for the volume label
SeeAlso: AH=11h,AH=4Fh,AX=4301h,AX=714Eh,AX=71A1h,AX=F257h/SF=02h
SeeAlso: INT 2F/AX=111Bh,INT 2F/AX=B711h

Format of FindFirst data block:
Offset  Size    Description     (Table 01626)
---PC-DOS 3.10, PC-DOS 4.01, MS-DOS 3.2/3.3/5.0---
 00h    BYTE    drive letter (bits 0-6), remote if bit 7 set
 01h 11 BYTEs   search template
 0Ch    BYTE    search attributes
---DOS 2.x (and some DOS 3.x???)---
 00h    BYTE    search attributes
 01h    BYTE    drive letter
 02h 11 BYTEs   search template
---WILDUNIX.COM---
 00h 12 BYTEs   15-character wildcard search pattern and drive letter (packed)
 0Ch    BYTE    search attributes
---DOS 2.x and most 3.x---
 0Dh    WORD    entry count within directory
 0Fh    DWORD   pointer to DTA???
 13h    WORD    cluster number of start of parent directory
---PC-DOS 4.01, MS-DOS 3.2/3.3/5.0---
 0Dh    WORD    entry count within directory
 0Fh    WORD    cluster number of start of parent directory
 11h  4 BYTEs   reserved
---OS/2 MVDM---
 00h    WORD    "OS2_BMP_handle"
 02h    WORD    "OS2_LastEnt"
 04h    DWORD   "OS2_Checksum"
 08h    BYTE    "OS2_usi_flag"
 09h    DWORD   used by DOS emulator for second pass for volume-label searches
 0Dh    WORD    (ret) "DOS_LastEnt" entry count within directory
 0Fh    BYTE    OS/2 Processed-FindFirst flag
                00h FindFirst processed by DOS
                42h FindFirst processed by OS/2
 10h  5 BYTEs   reserved for future use
---all versions, documented fields---
 15h    BYTE    attribute of file found
 16h    WORD    file time (see #01665 at AX=5700h)
 18h    WORD    file date (see #01666 at AX=5700h)
 1Ah    DWORD   file size
 1Eh 13 BYTEs   ASCIZ filename+extension
--------f-214E-------------------------------
INT 21 - WILDUNIX.COM internal - INSTALLATION CHECK
        AH = 4Eh
        DS:DX = 0000h:0000h
Return: AH = 99h if installed
Program: WILDUNIX.COM is a resident Unix-style wildcard expander by Steve
          Hosgood and Terry Barnaby
--------D-214F-------------------------------
INT 21 - DOS 2+ - "FINDNEXT" - FIND NEXT MATCHING FILE
        AH = 4Fh
        Disk Transfer Area contains data block from previous FindFirst or
          FindNext call
Return: CF clear if successful
            Disk Transfer Area updated
        CF set on error
            AX = error code (12h) (see #01680 at AH=59h/BX=0000h)
Notes:  under Novell DOS 7, if the FindFirst call (AH=4Eh) had CX=0088h, then
          the next matching deleted file will be returned
        since the entire state of a FindFirst/FindNext sequence is contained
          in the data block in the DTA, other disk operations such as renaming,
          moving, deleting, or creating files can cause inaccurate directory
          searches, such as finding the same file twice
BUG:    DR DOS 3.41 and 5.0 return the Directory attribute for the volume label
SeeAlso: AH=12h,AH=4Eh,AX=714Fh,AX=71A1h
--------D-2150-------------------------------
INT 21 - DOS 2+ internal - SET CURRENT PROCESS ID (SET PSP ADDRESS)
        AH = 50h
        BX = segment of PSP for new process
Notes:  DOS uses the current PSP address to determine which processes own files
          and memory; it corresponds to process identifiers used by other OSs
        under DOS 2.x, this function cannot be invoked inside an INT 28h
          handler without setting the Critical Error flag
        under MS-DOS 3.0+ and DR DOS 3.41+, this function does not use any of
          the DOS-internal stacks and may thus be called at any time, even
          during another INT 21h call
        some Microsoft applications such as Quick C 2.51 use segments of 0000h
          and FFFFh and direct access to the SDA (see #01687 at AX=5D06h) to
          test whether they are running under MS-DOS rather than a compatible
          OS; although one should only call this function with valid PSP
          addresses, any program hooking it should be prepared to handle
          invalid addresses
        this function is supported by the OS/2 compatibility box
        this call was undocumented prior to the release of DOS 5.0
SeeAlso: AH=26h,AH=51h,AH=62h
--------v-2150FD-----------------------------
INT 21 - VIRUS - "Predator 2" - INSTALLATION CHECK
        AX = 50FDh
Return: AX = FD50h if resident
SeeAlso: AX=4BFFh"VIRUS",AX=5454h"VIRUS"
--------D-2151-------------------------------
INT 21 - DOS 2+ internal - GET CURRENT PROCESS ID (GET PSP ADDRESS)
        AH = 51h
Return: BX = segment of PSP for current process
Notes:  DOS uses the current PSP address to determine which processes own files
          and memory; it corresponds to process identifiers used by other OSs
        under DOS 2.x, this function cannot be invoked inside an INT 28h
          handler without setting the Critical Error flag
        under DOS 3.0+, this function does not use any of the DOS-internal
          stacks and may thus be called at any time, even during another
          INT 21h call
        supported by OS/2 compatibility box
        identical to the documented AH=62h
        this call was undocumented prior to the release of DOS 5.0
SeeAlso: AH=26h,AH=50h,AH=62h
--------D-2152-------------------------------
INT 21 U - DOS 2+ internal - "SYSVARS" - GET LIST OF LISTS
        AH = 52h
Return: ES:BX -> DOS list of lists (see #01627)
Notes:  partially supported by OS/2 v1.1 compatibility box (however, most
          pointers are FFFFh:FFFFh, LASTDRIVE is FFh, and the NUL header "next"
          pointer is FFFFh:FFFFh).
        partially supported by the Windows NT DOS box; contains only a
          rudimentary Current Directory Structure (see #01645)
        on return, ES points at the DOS data segment (see also INT 2F/AX=1203h)
        Quarterdeck's suggested check for the use of its DOSDATA.SYS or
          DOS-UP.SYS is to test whether the list-of-lists segment is greater
          than the segment of the first memory block; a better check for
          DOS-UP.SYS is INT 21/AX=2B01h/CX=444Dh
        because not all DOS workalikes support all fields in the List of Lists,
          applications should ensure that pointers are neither 0000h:0000h
          nor FFFFh:FFFFh before using them
        Windows for Workgroups 3.11 network and Windows95 set the path to
          the local drive and directory even for network drives; in that
          case the UNC form \\SERVER\SHARE can be obtained with
          INT 21/AX=5F02h or INT 21/AX=5F46h. LapLink RemoteAccess does the
          same even for INT 21/AX=5F02h
        Windows95 GUI no longer returns the true path for a SUBSTed drive,
          but MS-DOS 7.00 does; use INT 21/AH=60h to obtain the true name
SeeAlso: INT 2F/AX=1203h

Format of List of Lists:
Offset  Size    Description     (Table 01627)
 -24    WORD    (DOS 3.1+) contents of CX from INT 21/AX=5E01h
 -22    WORD    (DOS ???+) LRU counter for FCB caching
 -20    WORD    (DOS ???+) LRU counter for FCB opens
 -18    DWORD   (DOS ???+) address of OEM function handler (see INT 21/AH=F8h)
                        FFFFh:FFFFh if not installed or not available
 -14    WORD    (DOS ???+) offset in DOS CS of code to return from INT 21 call
 -12    WORD    (DOS 3.1+) sharing retry count (see AX=440Bh)
 -10    WORD    (DOS 3.1+) sharing retry delay (see AX=440Bh)
 -8     DWORD   (DOS 3.0+) pointer to current disk buffer
 -4     WORD    (DOS 3.0+) pointer in DOS data segment of unread CON input
                when CON is read via a handle, DOS reads an entire line,
                  and returns the requested portion, buffering the rest
                  for the next read.  0000h indicates no unread input
 -2     WORD    segment of first memory control block (see #01628)
 00h    DWORD   pointer to first Drive Parameter Block (see #01395 at AH=32h)
 04h    DWORD   -> first System File Table (see #01639,#01640,#01641,#01642)
 08h    DWORD   pointer to active CLOCK$ device's header (most recently loaded
                  driver with CLOCK bit set)
 0Ch    DWORD   pointer to active CON device's header (most recently loaded
                  driver with STDIN bit set)
---DOS 2.x---
 10h    BYTE    number of logical drives in system
 11h    WORD    maximum bytes/block of any block device
 13h    DWORD   pointer to first disk buffer (see #01649,#01650)
 17h 18 BYTEs   actual NUL device driver header (not a pointer!)
                NUL is always the first device on DOS's linked list of device
                  drivers. (see #01646)
---DOS 3.0---
 10h    BYTE    number of block devices
 11h    WORD    maximum bytes/block of any block device
 13h    DWORD   pointer to first disk buffer (see #01650,#01652)
 17h    DWORD   pointer to array of current directory structures (see #01643)
 1Bh    BYTE    value of LASTDRIVE command in CONFIG.SYS (default 5)
 1Ch    DWORD   pointer to STRING= workspace area
 20h    WORD    size of STRING area (the x in STRING=x from CONFIG.SYS)
 22h    DWORD   pointer to FCB table
 26h    WORD    the y in FCBS=x,y from CONFIG.SYS
 28h 18 BYTEs   actual NUL device driver header (not a pointer!)
                NUL is always the first device on DOS's linked list of device
                  drivers. (see #01646)
---DOS 3.1-3.3---
 10h    WORD    maximum bytes per sector of any block device
 12h    DWORD   pointer to first disk buffer in buffer chain (see #01650)
 16h    DWORD   pointer to array of current directory structures (see #01643)
 1Ah    DWORD   pointer to system FCB tables (see #01640,#01641,#01642)
 1Eh    WORD    number of protected FCBs (the y in the CONFIG.SYS FCBS=x,y)
 20h    BYTE    number of block devices installed
 21h    BYTE    number of available drive letters (largest of 5, installed
                  block devices, and CONFIG.SYS LASTDRIVE=).  Also size of
                  current directory structure array.
 22h 18 BYTEs   actual NUL device driver header (not a pointer!)
                NUL is always the first device on DOS's linked list of device
                  drivers. (see #01646)
 34h    BYTE    number of JOIN'ed drives
---DOS 4.x---
 10h    WORD    maximum bytes per sector of any block device
 12h    DWORD   pointer to disk buffer info record (see #01652,#01653)
                Note: although the initialization code in IO.SYS uses this
                  pointer, MSDOS.SYS does not, instead using the hardcoded
                  address of the info record
 16h    DWORD   pointer to array of current directory structures
                (see #01643,#01644)
 1Ah    DWORD   pointer to system FCB tables (see #01640,#01641,#01642)
 1Eh    WORD    number of protected FCBs (the y in the CONFIG.SYS FCBS=x,y)
                (always 00h for DOS 5.0)
 20h    BYTE    number of block devices installed
 21h    BYTE    number of available drive letters; also size of current
                  directory structure array.
                For DOS 4.0-6.0: largest of 5, installed block devices,
                  and CONFIG.SYS LASTDRIVE=
                For DOS 7.x (Windows9X), set to 32 if no LASTDRIVE= or
                  LASTDRIVEHIGH=, else set to larger of installed block
                  devices and LASTDRIVE(HIGH)=
 22h 18 BYTEs   actual NUL device driver header (not a pointer!)
                NUL is always the first device on DOS's linked list of device
                  drivers. (see #01646)
 34h    BYTE    number of JOIN'ed drives
 35h    WORD    pointer within IBMDOS code segment to list of special program
                  names (see #01662)
                (always 0000h for DOS 5.0)
 37h    DWORD   pointer to FAR routine for resident IFS utility functions
                (see #01658)
                may be called by any IFS driver which does not wish to
                  service functions 20h or 24h-28h itself
 3Bh    DWORD   pointer to chain of IFS (installable file system) drivers
 3Fh    WORD    the x in BUFFERS x,y (rounded up to multiple of 30 if in EMS)
 41h    WORD    number of lookahead buffers (the y in BUFFERS x,y)
 43h    BYTE    boot drive (1=A:)
 44h    BYTE    flag: 01h to use DWORD moves (80386+), 00h otherwise
 45h    WORD    extended memory size in KB
---DOS 5.0-6.0---
 10h 39 BYTEs   as for DOS 4.x (above)
 37h    DWORD   pointer to SETVER program list or 0000h:0000h
 3Bh    WORD    (DOS=HIGH) offset in DOS CS of function to fix A20 control
                  when executing special .COM format
 3Dh    WORD    PSP of most-recently EXECed program if DOS in HMA, 0000h if low
                used for maintaining count of INT 21 calls which disable A20
                  on return
 3Fh  8 BYTEs   as for DOS 4.x (above)
---Windows NT DOS Box---
 10h  6 BYTEs   ???
 16h    DWORD   pointer to array of current directory structures (see #01645)
 1Ah  6 BYTEs   ???
 20h    BYTE    number of block devices installed
 21h    BYTE    number of local drive letters (= installed block devices)
                Also size of current directory structure array.
 22h 18 BYTEs   actual NUL device driver header (not a pointer!)
                NUL is always the first device on DOS's linked list of device
                  drivers. (see #01646)
---DOS 7.x---
 10h 55 BYTEs   as for DOS 5.0-6.0 (above)
 47h 25 BYTEs   ???
 60h    BYTE    "DOS_FLAG" (see also INT 26)

Format of DOS memory control block:
Offset  Size    Description     (Table 01628)
 00h    BYTE    block type: 5Ah if last block in chain, otherwise 4Dh
 01h    WORD    PSP segment of owner or special flag value (see #01629)
 03h    WORD    size of memory block in paragraphs
 05h  3 BYTEs   unused by MS-DOS
                (386MAX) if locked-out block, region start/prev region end
---DOS 2.x,3.x---
 08h  8 BYTEs   unused
---DOS 4.0+ ---
 08h  8 BYTEs   ASCII program name if PSP memory block or DR DOS UMB,
                  else garbage
                null-terminated if less than 8 characters
Notes:  the next MCB is at segment (current + size + 1)
        under DOS 3.1+, the first memory block is the DOS data segment,
          containing installable drivers, buffers, etc.  Under DOS 4.0+ it is
          divided into subsegments, each with its own memory control block
          (see #01633), the first of which is at offset 0000h.
        for DOS 5+, blocks owned by DOS may have either "SC" or "SD" in bytes
          08h and 09h.  "SC" is system code or locked-out inter-UMB memory,
          "SD" is system data, device drivers, etc.
        Some versions of DR DOS use only seven characters of the program name,
          placing a NUL in the eighth byte.
SeeAlso: #01630,#01632,#01633

(Table 01629)
Values for special flag PSP segments:
 0000h  free
 0006h  DR DOS XMS UMB
 0007h  DR DOS excluded upper memory ("hole")
 0008h  belongs to DOS
 FFF7h  386MAX v6.01+ ???
 FFFAh  386MAX UMB control block (see #01477 at AX=4402h"386MAX")
 FFFDh  386MAX locked-out memory
 FFFEh  386MAX UMB (normally immediately follows its control block)
 FFFFh  386MAX v6.01+ device driver

Format of MS-DOS 5+ UMB control block:
Offset  Size    Description     (Table 01630)
 00h    BYTE    type: 5Ah if last block in chain, 4Dh otherwise
 01h    WORD    first available paragraph in UMB if control block at start
                  of UMB, 000Ah if control block at end of UMB
 03h    WORD    length in paragraphs of following UMB or locked-out region
 05h  3 BYTEs   unused
 08h  8 BYTEs   block type name: "UMB" if start block, "SM" if end block in UMB
SeeAlso: #01628,#01631

Format of MS-DOS 7.0 HMA memory control block:
Offset  Size    Description     (Table 01631)
 00h    WORD    signature "MS" (4Dh 53h)
 02h    WORD    usage flag???
                0000h free
                else ???
 04h    WORD    size of memory block in bytes (not counting MCB)
 06h    WORD    offset of next memory block in HMA or 0000h
 08h  8 BYTEs   unused (0)
SeeAlso: #01628,#01630,#01632

Format of STARLITE (General Software's Embedded DOS) memory control block:
Offset  Size    Description     (Table 01632)
 00h    BYTE    block type: 5Ah if last block in chain, otherwise 4Dh
 01h    WORD    PSP segment of owner, 0000h if free, 0008h if belongs to DOS
 03h    WORD    size of memory block in paragraphs
 05h    BYTE    unused
 06h    WORD    segment address of next memory control block (0000h if last)
 08h    WORD    segment address of previous memory control block or 0000h
 0Ah  6 BYTEs   reserved

Format of DOS 4.0+ data segment subsegment control blocks:
Offset  Size    Description     (Table 01633)
 00h    BYTE    subsegment type (blocks typically appear in this order)
                "D"  device driver
                "E"  device driver appendage
                "I"  IFS (Installable File System) driver
                     (MS-DOS 7) high-loaded drive data table array (see #02603)
                "F"  FILES=  control block storage area (for FILES>5)
                "X"  FCBS=   control block storage area, if present
                "C"  BUFFERS EMS workspace area (if BUFFERS /X option used)
                "B"  BUFFERS=  storage area
                "L"  LASTDRIVE=  current directory structure array storage area
                "S"  STACKS=  code and data area, if present (see #01634,#01635)
                "T"  INSTALL= transient code
 01h    WORD    paragraph of subsegment start (usually the next paragraph)
 03h    WORD    size of subsegment in paragraphs
 05h  3 BYTEs   unused
 08h  8 BYTEs   for types "D" and "I", base name of file from which the driver
                  was loaded (unused for other types)

Format of data at start of STACKS code segment (if present):
Offset  Size    Description     (Table 01634)
 00h    WORD    ???
 02h    WORD    number of stacks (the x in STACKS=x,y)
 04h    WORD    size of stack control block array (should be 8*x)
 06h    WORD    size of each stack (the y in STACKS=x,y)
 08h    DWORD   pointer to STACKS data segment
 0Ch    WORD    offset in STACKS data segment of stack control block array
 0Eh    WORD    offset in STACKS data segment of last element of that array
 10h    WORD    offset in STACKS data segment of the entry in that array for
                  the next stack to be allocated (initially same as value in
                  0Eh and works its way down in steps of 8 to the value in
                  0Ch as hardware interrupts pre-empt each other)
Note:   the STACKS code segment data may, if present, be located as follows:
    DOS 3.2:    The code segment data is at a paragraph boundary fairly early
                  in the IBMBIO segment (seen at 0070:0190h)
    DOS 3.3:    The code segment is at a paragraph boundary in the DOS data
                  segment, which may be determined by inspecting the segment
                  pointers of the vectors for those of interrupts 02h, 08h-0Eh,
                  70h, 72-77h which have not been redirected by device drivers
                  or TSRs.
    DOS 4.0+    Identified by sub-segment control block type "S" within the DOS
                  data segment.
SeeAlso: #01636,INT B4"STACKMAN"

Format of array elements in STACKS data segment:
Offset  Size    Description     (Table 01635)
 00h    BYTE    status: 00h=free, 01h=in use, 03h=corrupted by overflow of
                  higher stack.
 01h    BYTE    not used
 02h    WORD    previous SP
 04h    WORD    previous SS
 06h    WORD    ptr to word at top of stack (new value for SP). The word at the
                  top of the stack is preset to point back to this control
                  block.

Format of SHARE.EXE hooks (DOS 3.1-6.00):
Offset  Size    Description     (Table 01636)
(offsets from first system file table--pointed at by ListOfLists+04h)
-3Ch    DWORD   pointer to FAR routine for ???
                Note: not called by MS-DOS 3.3, set to 0000h:0000h by
                        SHARE 3.3+
-38h    DWORD   pointer to FAR routine called on opening file
                on call, internal DOS location points at filename
                  (see #01687 at AX=5D06h)
                Return: CF clear if successful
                        CF set on error
                            AX = DOS error code (24h)
                                  (see #01680 at AH=59h/BX=0000h)
                Note: SHARE directly accesses DOS-internal data to get name of
                        file just opened
-34h    DWORD   pointer to FAR routine called on closing file
                ES:DI -> system file table
                Note: does something to every Record Lock Record for file
-30h    DWORD   pointer to FAR routine to close all files for given computer
                (called by AX=5D03h)
-2Ch    DWORD   pointer to FAR routine to close all files for given process
                (called by AX=5D04h)
-28h    DWORD   pointer to FAR routine to close file by name
                (called by AX=5D02h)
                DS:SI -> DOS parameter list (see #01686 at AX=5D00h)
                   DPL's DS:DX -> name of file to close
                Return: CF clear if successful
                        CF set on error
                            AX = DOS error code (03h)
                                  (see #01680 at AH=59h/BX=0000h)
-24h    DWORD   pointer to FAR routine to lock region of file
                call with BX = file handle
                          ---DOS 3.x---
                          CX:DX = starting offset
                          SI:AX = size
                          ---DOS 4.0+ ---
                          DS:DX -> lock range
                                        DWORD start offset
                                        DWORD size in bytes
                Return: CF set on error
                            AL = DOS error code (21h) (see #01680 at AH=59h)
                Note: not called if file is marked as remote
-20h    DWORD   pointer to FAR routine to unlock region of file
                call with BX = file handle
                          ---DOS 3.x---
                          CX:DX = starting offset
                          SI:AX = size
                          ---DOS 4.0+ ---
                          DS:DX -> lock range
                                        DWORD start offset
                                        DWORD size in bytes
                Return: CF set on error
                            AL = DOS error code (21h) (see #01680 at AH=59h)
                Note: not called if file is marked as remote
-1Ch    DWORD   pointer to FAR routine to check if file region is locked
                call with ES:DI -> system file table entry for file
                        CX = length of region from current position in file
                Return: CF set if any portion of region locked
                            AX = 0021h
-18h    DWORD   pointer to FAR routine to get open file list entry
                (called by AX=5D05h)
                call with DS:SI -> DOS parameter list (see #01686 at AX=5D00h)
                        DPL's BX = index of sharing record
                        DPL's CX = index of SFT in SFT chain of sharing rec
                Return: CF set on error or not loaded
                            AX = DOS error code (12h) (see #01680 at AH=59h)
                        CF clear if successful
                            ES:DI -> filename
                            CX = number of locks owned by specified SFT
                            BX = network machine number
                            DX destroyed
-14h    DWORD   pointer to FAR routine for updating FCB from SFT???
                call with DS:SI -> unopened FCB
                          ES:DI -> system file table entry
                Return: BL = C0h???
                Note: copies following fields from SFT to FCB:
                   starting cluster of file       0Bh    1Ah
                   sharing record offset          33h    1Ch
                   file attribute                 04h    1Eh
-10h    DWORD   pointer to FAR routine to get first cluster of FCB file ???
                call with ES:DI -> system file table entry
                          DS:SI -> FCB
                Return: CF set if SFT closed or sharing record offsets
                                mismatched
                        CF clear if successful
                            BX = starting cluster number from FCB
-0Ch    DWORD   pointer to FAR routine to close file if duplicate for process
                DS:SI -> system file table
                Return: AX = number of handle in JFT which already uses SFT
                Note: called during open/create of a file
                Note: if SFT was opened with inheritance enabled and sharing
                        mode 111, does something to all other SFTs owned by
                        same process which have the same file open mode and
                        sharing record
-08h    DWORD   pointer to FAR routine for closing file
                Note: closes various handles referring to file most-recently
                        opened
-04h    DWORD   pointer to FAR routine to update directory info in related SFT
                  entries
                call with ES:DI -> system file table entry for file (see #01641)
                          AX = subfunction (apply to each related SFT)
                                00h: update time stamp (offset 0Dh) and date
                                     stamp (offset 0Fh)
                                01h: update file size (offset 11h) and starting
                                     cluster (offset 0Bh).  Sets last-accessed
                                     cluster fields to start of file if file
                                     never accessed
                                02h: as function 01h, but last-accessed fields
                                     always changed
                                03h: do both functions 00h and 02h
                Note: follows ptr at offset 2Bh in system file table entries
                Note: NOP if opened with no-inherit or via FCB
Notes:  most of the above hooks (except -04h, -14h, -18h, and -3Ch) assume
          either that SS=DOS DS or SS=DS=DOS DS and directly access
          DOS-internal data
        sharing hooks are not supported by DR DOS 5-6; they appear to be
          supported by Novell DOS 7, with a segment of 0000h indicating the
          DOS data segment
SeeAlso: #01637,#01638

Format of sharing record:
Offset  Size    Description     (Table 01637)
 00h    BYTE    flag
                00h free block
                01h allocated block
                FFh end marker
 01h    WORD    size of block
 03h    BYTE    checksum of pathname (including NUL)
                if sum of ASCII values is N, checksum is (N/256 + N%256)
 04h    WORD    offset in SHARE's DS of first Record Lock Record (see #01638)
 06h    DWORD   pointer to start of system file table chain for file
 0Ah    WORD    unique sequence number
 0Ch    var     ASCIZ full pathname
Note:   not supported by DR DOS SHARE 1.1 and 2.0; will reportedly be
          supported by Novell DOS 7
SeeAlso: #01636,#01638

Format of SHARE.EXE Record Lock Record:
Offset  Size    Description     (Table 01638)
 00h    WORD    offset in SHARE's DS of next lock table in list or 0000h
 02h    DWORD   offset in file of start of locked region
 06h    DWORD   offset in file of end of locked region
 0Ah    DWORD   pointer to System File Table entry for this file
 0Eh    WORD    PSP segment of lock's owner
---DOS 5+ ---
 10h    WORD    lock type: (00h lock all, 01h lock writes only)
SeeAlso: #01636,#01637,#01639,#01642

Format of DOS 2.x system file tables:
Offset  Size    Description     (Table 01639)
 00h    DWORD   pointer to next file table (offset FFFFh if last)
 04h    WORD    number of files in this table
 06h  28h bytes per file
        Offset  Size    Description
         00h    BYTE    number of file handles referring to this file
         01h    BYTE    file open mode (see #01402 at AH=3Dh)
         02h    BYTE    file attribute
         03h    BYTE    drive (0 = character device, 1 = A, 2 = B, etc)
         04h 11 BYTEs   filename in FCB format (no path,no period,blank-padded)
         0Fh    WORD    ???
         11h    WORD    ???
         13h    DWORD   file size???
         17h    WORD    file date in packed format (see #01666 at AX=5700h)
         19h    WORD    file time in packed format (see #01665 at AX=5700h)
         1Bh    BYTE    device attribute (see #01423 at AX=4400h)
        ---character device---
         1Ch    DWORD   pointer to device driver
        ---block device---
         1Ch    WORD    starting cluster of file
         1Eh    WORD    relative cluster in file of last cluster accessed
        ------
         20h    WORD    absolute cluster number of current cluster
         22h    WORD    ???
         24h    DWORD   current file position???
SeeAlso: #01640,#01641,#01642

Format of DOS 3.0 system file tables and FCB tables:
Offset  Size    Description     (Table 01640)
 00h    DWORD   pointer to next file table (offset FFFFh if last)
 04h    WORD    number of files in this table
 06h  38h bytes per file
        Offset  Size    Description
         00h-1Eh as for DOS 3.1+ (see #01641)
         1Fh    WORD    byte offset of directory entry within sector
         21h 11 BYTEs   filename in FCB format (no path/period, blank-padded)
         2Ch    DWORD   (SHARE.EXE) pointer to previous SFT sharing same file
         30h    WORD    (SHARE.EXE) network machine number which opened file
                        (Windows Enhanced mode DOSMGR uses the virtual machine
                          ID as the machine number; see INT 2F/AX=1683h)
         32h    WORD    PSP segment of file's owner (first three entries for
                          AUX/CON/PRN contain segment of IO.SYS startup code)
         34h    WORD    (SHARE.EXE) offset in SHARE code seg of share record
         36h    WORD    ??? apparently always 0000h
SeeAlso: #01639,#01641,#01642

Format of DOS 3.1-3.3x, DR DOS 5.0-6.0 system file tables and FCB tables:
Offset  Size    Description     (Table 01641)
 00h    DWORD   pointer to next file table (offset FFFFh if last)
 04h    WORD    number of files in this table
 06h  35h bytes per file
        Offset  Size    Description
         00h    WORD    number of file handles referring to this file
         02h    WORD    file open mode (see AX=6C00h, #01402 at AH=3Dh)
                        bit 15 set if this file opened via FCB
         04h    BYTE    file attribute (see #01420 at AX=4301h)
         05h    WORD    device info word (see #01423 at AX=4400h)
                        bit 15 set if remote file
                        bit 14 set means do not set file date/time on closing
                        bit 12 set means don't inherit on EXEC
                        bits 5-0 drive number for disk files
         07h    DWORD   pointer to device driver header if character device
                        else pointer to DOS Drive Parameter Block
                          (see #01395 at AH=32h)
         0Bh    WORD    starting cluster of file
         0Dh    WORD    file time in packed format (see #01665 at AX=5700h)
                        not used for character devices in DR DOS
         0Fh    WORD    file date in packed format (see #01666 at AX=5700h)
                        not used for character devices in DR DOS
         11h    DWORD   file size
        ---system file table---
         15h    DWORD   current offset in file (may be larger than size of
                          file; INT 21/AH=42h does not check new position)
        ---FCB table---
         15h    WORD    counter for last I/O to FCB
         17h    WORD    counter for last open of FCB
                        (these are separate to determine the times of the
                          latest I/O and open)
        ---
         19h    WORD    relative cluster within file of last cluster accessed
         1Bh    WORD    absolute cluster number of last cluster accessed
                        0000h if file never read or written???
         1Dh    WORD    number of sector containing directory entry
                        (see #01352)
         1Fh    BYTE    number of dir entry within sector (byte offset/32)
         20h 11 BYTEs   filename in FCB format (no path/period, blank-padded)
         2Bh    DWORD   (SHARE.EXE) pointer to previous SFT sharing same file
         2Fh    WORD    (SHARE.EXE) network machine number which opened file
                        (Windows Enhanced mode DOSMGR uses the virtual machine
                          ID as the machine number; see INT 2F/AX=1683h)
         31h    WORD    PSP segment of file's owner (see #01378 at AH=26h)
                          (first three entries for AUX/CON/PRN contain segment
                          of IO.SYS startup code)
         33h    WORD    offset within SHARE.EXE code segment of
                          sharing record (see #01637) 0000h = none
SeeAlso: #01639,#01640,#01642

Format of DOS 4.0-6.0 system file tables and FCB tables:
Offset  Size    Description     (Table 01642)
 00h    DWORD   pointer to next file table (offset FFFFh if last)
 04h    WORD    number of files in this table
 06h  3Bh bytes per file
        Offset  Size    Description
         00h    WORD    number of file handles referring to this file
                        FFFFh if in use but not referenced
         02h    WORD    file open mode (see AX=6C00h,#01402 at AH=3Dh)
                        bit 15 set if this file opened via FCB
         04h    BYTE    file attribute (see #01420 at AX=4301h)
         05h    WORD    device info word (see also #01423 at AX=4400h)
                        bit 15 set if remote file
                        bit 14 set means do not set file date/time on closing
                        bit 13 set if named pipe
                        bit 12 set if no inherit
                        bit 11 set if network spooler
                        bit 7  set if device, clear if file (only if local)
                        bits 6-0 as for AX=4400h
         07h    DWORD   pointer to device driver header if character device
                        else pointer to DOS Drive Parameter Block
                          (see #01395 at AH=32h) or REDIR data
         0Bh    WORD    starting cluster of file (local files only)
                        not set for FAT32-capable versions of Windows95
                          (since they allow 32-bit cluster numbers)
         0Dh    WORD    file time in packed format (see #01665)
         0Fh    WORD    file date in packed format (see #01666)
         11h    DWORD   file size
         15h    DWORD   current offset in file (SFT)
                        LRU counters (FCB table, two WORDs)
        ---local file---
         19h    WORD    relative cluster within file of last cluster accessed
         1Bh    DWORD   number of sector containing directory entry
         1Fh    BYTE    number of dir entry within sector (byte offset/32)
        ---network redirector---
         19h    DWORD   pointer to REDIRIFS record
         1Dh  3 BYTEs   ???
        ------
         20h 11 BYTEs   filename in FCB format (no path/period, blank-padded)
         2Bh    DWORD   (SHARE.EXE) pointer to previous SFT sharing same file
         2Fh    WORD    (SHARE.EXE) network machine number which opened file
                        (Windows Enhanced mode DOSMGR uses the virtual machine
                          ID as the machine number; see INT 2F/AX=1683h)
         31h    WORD    PSP segment of file's owner (see #01378 at AH=26h)
                          (first three entries for AUX/CON/PRN contain segment
                          of IO.SYS startup code)
         33h    WORD    offset within SHARE.EXE code segment of
                        sharing record (see #01595)  0000h = none
         35h    WORD    (local) absolute cluster number of last clustr accessed
                        (redirector) ???
         37h    DWORD   pointer to IFS driver for file, 0000000h if native DOS
Note:   the OS/2 2.0 DOS Boot Session does not properly fill in the filename
          field due to incomplete support for SFTs; the OS/2 2.0 DOS Window
          does not appear to support SFTs at all
SeeAlso: #01639,#01640,#01641

Format of current directory structure (CDS) (array, LASTDRIVE entries):
Offset  Size    Description     (Table 01643)
 00h 67 BYTEs   ASCIZ path in form X:\PATH (local) or UNC form
                  \\SERVER\PATH (network, see notes below)
 43h    WORD    drive attributes (also see note below) (see also AX=5F07h)
                bit 15: uses network redirector  \ invalid if 00, installable
                bit 14: physical drive           / file system if 11
                bit 13: JOIN'ed   \ path above is true path that would be
                bit 12: SUBST'ed  / needed if not under SUBST or JOIN
                bit 11: removable media (WinNT4.0)
                bit 10: hard disk??? (WinNT4.0)
                bit  7: remote drive hidden from redirector's assign-list and
                          exempt from network connection make/break commands;
                          set for CD-ROM drives by MSCDEX (not supported by
                          CORELCDX)
 45h    DWORD   pointer to Drive Parameter Block for drive
                  (see #01395 at AH=32h)
---local drives---
 49h    WORD    starting cluster of current directory
                0000h = root, FFFFh = never accessed
 4Bh    WORD    ??? seems to be FFFFh always
 4Dh    WORD    ??? seems to be FFFFh always
---network drives---
 49h    DWORD   pointer to redirector or REDIRIFS record, or FFFFh:FFFFh
                (DOS 4 only) available for use by IFS driver
 4Dh    WORD    stored user data from INT 21/AX=5F03h
------
 4Fh    WORD    offset in current directory path of backslash corresponding to
                  root directory for drive
                this value specifies how many characters to hide from the
                  "CHDIR" and "GETDIR" calls; normally set to 2 to hide the
                  drive letter and colon, SUBST, JOIN, and networks change it
                  so that only the appropriate portion of the true path is
                  visible to the user
---DOS 4.0+ ---
 51h    BYTE    (DOS 4 only, remote drives) device type
                04h network drive
 52h    DWORD   pointer to IFS driver (DOS 4) or redirector block (DOS 5+) for
                  this drive, 00000000h if native DOS
 56h    WORD    available for use by IFS driver
Notes:  the path for invalid drives is normally set to X:\, but may be empty
          after JOIN x: /D in DR DOS 5.0 or NET USE x: /D in older LAN versions
        normally, only one of bits 13&12 may be set together with bit 14, but
          DR DOS 5.0 uses other combinations for bits 15-12: 0111 JOIN,
          0001 SUBST, 0101 ASSIGN (see #01644)
        Windows for Workgroups 3.11 network sets the path to the local
          drive and directory even for network drives; in that case the
          UNC form \\SERVER\SHARE can be obtained with INT 21/AX=5F02h
          or INT 21/AX=5F46h. LapLink RemoteAccess does the same even for
          INT 21/AX=5F02h
        Window NT 4.0 always uses X:\PATH, even for substituted drives (i.e.
          the CDS will *not* contain the original path prior to SUBST)
        SoftWindows on the Macintosh PowerPC sets \\E for the host drive
SeeAlso: #01644,INT 21/AX=71AAh/BL=00h

Format of DR DOS 5.0-6.0 current directory structure entry (array):
Offset  Size    Description     (Table 01644)
 00h 67 BYTEs   ASCIZ pathname of actual root directory for this logical drive
 43h    WORD    drive attributes
                1000h SUBSTed drive
                3000h??? JOINed drive
                4000h physical drive
                5000h ASSIGNed drive
                7000h JOINed drive
                8000h network drive
 45h    BYTE    physical drive number (0=A:) if this logical drive is valid
 46h    BYTE    ??? apparently flags for JOIN and ASSIGN
 47h    WORD    cluster number of start of parent directory (0000h = root)
 49h    WORD    entry number of current directory in parent directory
 4Bh    WORD    cluster number of start of current directory
 4Dh    WORD    used for media change detection (details not available)
 4Fh    WORD    cluster number of SUBST/JOIN "root" directory
                0000h if physical root directory
SeeAlso: #01643

Format of Windows NT Current Directory Structure (CDS) (array):
Offset  Size    Description     (Table 01645)
 00h 67 BYTEs   ASCIZ path in form X:\ (does not show either current directory
                  or network path)
 43h  4 BYTEs   ???
Note:   the WinNT CDS contains only as many entries as there are local drives,
          not LASTDRIVE entries.

Format of DOS device driver header:
Offset  Size    Description     (Table 01646)
 00h    DWORD   pointer to next driver, offset=FFFFh if last driver
 04h    WORD    device attributes (see #01647,#01648)
 06h    WORD    device strategy entry point
                call with ES:BX -> request header
                  (see #02597 at INT 2F/AX=0802h)
 08h    WORD    device interrupt entry point
---character device---
 0Ah  8 BYTEs   blank-padded character device name
---block device---
 0Ah    BYTE    number of subunits (drives) supported by driver
 0Bh  7 BYTEs   normally unused; sometimes contains signature to indicate
                  specific drivers:
                "$PCMATA"   PCMCIA driver PCMATA.SYS (see AX=440Dh"DOS 3.2+")
                "AHADDVR"   Adaptec SCSI disk driver ASPIDISK.SYS
                "DBLSPAC"   MS DoubleSpace or DriveSpace
                "DSKREET"   NortonUtils v5+ Diskreet (see INT 2F/AX=FE00h)
                "GFS    "   LapLink III device driver DD.BIN
                "SIDExxx"   PCMCIA driver ATADRV.EXE (see AX=440Dh"DOS 3.2+")
                "STAC-CD"   Stacker/Stacker Anywhere (see AX=4404h"Stacker")
---DoubleSpace/DriveSpace---
 12h  2 BYTEs   signature ",." (2Ch 2Eh)
 14h    var     preloading API entry point
---CD-ROM---
 12h    WORD    reserved, must be 0000h
                appears to be another device chain
 14h    BYTE    drive letter, 01h=A:, etc. (must initially be 00h; this byte
                  is set by MSCDEX when it loads)
 15h    BYTE    number of units
 16h  6 BYTEs   signature 'MSCDnn' where 'nn' is version (currently '00')
                (this field does not exist in most drivers)
SeeAlso: #02550 at INT 25/AX=CDCDh,#02845 at INT 2F/AX=5600h

Bitfields for device attributes (character device):
Bit(s)  Description     (Table 01647)
 15     set (indicates character device)
 14     IOCTL supported (see AH=44h)
 13     (DOS 3.0+) output until busy supported
 12     reserved
 11     (DOS 3.0+) OPEN/CLOSE/RemMedia calls supported
 10-8   reserved
 7      (DOS 5.0+) Generic IOCTL check call supported (driver command 19h)
        (see AX=4410h,AX=4411h)
 6      (DOS 3.2+) Generic IOCTL call supported (driver command 13h)
        (see AX=440Ch,AX=440Dh"DOS 3.2+")
 5      reserved
 4      device is special (use INT 29 "fast console output")
 3      device is CLOCK$ (all reads/writes use transfer record described
          below)
 2      device is NUL
 1      device is standard output
 0      device is standard input
Note:   for European MS-DOS 4.0, bit 11 also indicates that bits 8-6 contain a
          version code (000 = DOS 3.0,3.1; 001 = DOS 3.2;
          010 = European DOS 4.0)
SeeAlso: #01648,#01646

Bitfields for device attributes (block device):
Bit(s)  Description     (Table 01648)
 15     clear (indicates block device)
 14     IOCTL supported
 13     non-IBM format
 12     network device (device is remote)
 11     (DOS 3.0+) OPEN/CLOSE/RemMedia calls supported
 10     reserved
 9      direct I/O not allowed??? (set by DOS 3.3 DRIVER.SYS for "new" drives)
 8      ??? set by DOS 3.3 DRIVER.SYS for "new" drives
 7      (DOS 5.0+) Generic IOCTL check call supported (driver command 19h)
        (see AX=4410h,AX=4411h)
 6      (DOS 3.2+) Generic IOCTL call supported (driver command 13h)
        implies support for commands 17h and 18h
          (see AX=440Ch,AX=440Dh"DOS 3.2+",AX=440Eh,AX=440Fh)
 5-2    reserved
 1      driver supports 32-bit sector addressing (DOS 3.31+)
 0       reserved
Note:   for European MS-DOS 4.0, bit 11 also indicates that bits 8-6 contain a
          version code (000 = DOS 3.0,3.1; 001 = DOS 3.2;
          010 = European DOS 4.0)
SeeAlso: #01647,#01646

Format of DOS 2.x disk buffer:
Offset  Size    Description     (Table 01649)
 00h    DWORD   pointer to next disk buffer, offset = FFFFh if last
                least-recently used buffer is first in chain
 04h    BYTE    drive (0=A, 1=B, etc), FFh if not in use
 05h  3 BYTEs   unused??? (seems always to be 00h 00h 01h)
 08h    WORD    logical sector number
 0Ah    BYTE    number of copies to write (1 for non-FAT sectors)
 0Bh    BYTE    sector offset between copies if multiple copies to be written
 0Ch    DWORD   pointer to DOS Drive Parameter Block (see #01395 at AH=32h)
 10h            buffered data
SeeAlso: #01650,#01652,#01653,#01655

Format of DOS 3.x disk buffer:
Offset  Size    Description     (Table 01650)
 00h    DWORD   pointer to next disk buffer, offset = FFFFh if last
                least-recently used buffer is first in chain
 04h    BYTE    drive (0=A,1=B, etc), FFh if not in use
 05h    BYTE    buffer flags (see #01651)
 06h    WORD    logical sector number
 08h    BYTE    number of copies to write (1 for non-FAT sectors)
 09h    BYTE    sector offset between copies if multiple copies to be written
 0Ah    DWORD   pointer to DOS Drive Parameter Block (see #01395 at AH=32h)
 0Eh    WORD    unused??? (almost always 0)
 10h            buffered data
SeeAlso: #01649,#01652,#01653,#01655

Bitfields for DOS 3.x disk buffer flags:
Bit(s)  Description     (Table 01651)
 7      ???
 6      buffer dirty
 5      buffer has been referenced
 4      ???
 3      sector in data area
 2      sector in a directory, either root or subdirectory
 1      sector in FAT
 0      boot sector??? (guess)
SeeAlso: #01656

Format of DOS 4.00 (pre UR 25066) disk buffer info:
Offset  Size    Description     (Table 01652)
 00h    DWORD   pointer to array of disk buffer hash chain heads (see #01654)
 04h    WORD    number of disk buffer hash chains (referred to as NDBCH below)
 06h    DWORD   pointer to lookahead buffer, zero if not present
 0Ah    WORD    number of lookahead sectors, else zero (the y in BUFFERS=x,y)
 0Ch    BYTE    00h if buffers in EMS (/X), FFh if not
 0Dh    WORD    EMS handle for buffers, zero if not in EMS
 0Fh    WORD    EMS physical page number used for buffers (usually 255)
 11h    WORD    ??? seems always to be 0001h
 13h    WORD    segment of EMS physical page frame
 15h    WORD    ??? seems always to be zero
 17h  4 WORDs   EMS partial page mapping information???
SeeAlso: #01649,#01650,#01653,#01657

Format of DOS 4.01 (from UR 25066 Corrctive Services Disk on) disk buffer info:
Offset  Size    Description     (Table 01653)
 00h    DWORD   pointer to array of disk buffer hash chain heads (see #01654)
 04h    WORD    number of disk buffer hash chains (referred to as NDBCH below)
 06h    DWORD   pointer to lookahead buffer, zero if not present
 0Ah    WORD    number of lookahead sectors, else zero (the y in BUFFERS=x,y)
 0Ch    BYTE    01h, possibly to distinguish from pre-UR 25066 format
 0Dh    WORD    ??? EMS segment for BUFFERS (only with /XD)
 0Fh    WORD    ??? EMS physical page number of EMS seg above (only with /XD)
 11h    WORD    ??? EMS segment for ??? (only with /XD)
 13h    WORD    ??? EMS physical page number of above (only with /XD)
 15h    BYTE    ??? number of EMS page frames present (only with /XD)
 16h    WORD    segment of one-sector workspace buffer allocated in main memory
                  if BUFFERS/XS or /XD options in effect, possibly to avoid DMA
                  into EMS
 18h    WORD    EMS handle for buffers, zero if not in EMS
 1Ah    WORD    EMS physical page number used for buffers (usually 255)
 1Ch    WORD    ??? appears always to be 0001h
 1Eh    WORD    segment of EMS physical page frame
 20h    WORD    ??? appears always to be zero
 22h    BYTE    00h if /XS, 01h if /XD, FFh if BUFFERS not in EMS
SeeAlso: #01649,#01650,#01652,#01657

Format of DOS 4.x disk buffer hash chain head (array, one entry per chain):
Offset  Size    Description     (Table 01654)
 00h    WORD    EMS logical page number in which chain is resident, -1 if not
                  in EMS
 02h    DWORD   pointer to least recently used buffer header.  All buffers on
                  this chain are in the same segment.
 06h    BYTE    number of dirty buffers on this chain
 07h    BYTE    reserved (00h)
Notes:  buffered disk sectors are assigned to chain N where N is the sector's
          address modulo NDBCH,  0 <= N <= NDBCH-1
        each chain resides completely within one EMS page
        this structure is in main memory even if buffers are in EMS

Format of DOS 4.0-6.0 disk buffer:
Offset  Size    Description     (Table 01655)
 00h    WORD    forward ptr, offset only, to next least recently used buffer
 02h    WORD    backward pointer, offset only
 04h    BYTE    drive (0=A,1=B, etc) if bit 7 clear
                SFT index if bit 7 set
                FFh if not in use
 05h    BYTE    buffer flags (see #01656)
 06h    DWORD   logical sector number (local buffers only)
 0Ah    BYTE    number of copies to write
                for FAT sectors, same as number of FATs
                for data and directory sectors, usually 1
 0Bh    WORD    offset in sectors between copies to write for FAT sectors
 0Dh    DWORD   pointer to DOS Drive Parameter Block (see #01395 at AH=32h)
 11h    WORD    size of data in buffer if remote buffer (see also #01656)
 13h    BYTE    reserved (padding)
 14h            buffered data
Note:   for DOS 4.x, all buffered sectors which have the same hash value
          (computed as the sum of high and low words of the logical sector
          number divided by the number of disk buffer chains) are on the same
          doubly-linked circular chain; for DOS 5+, only a single circular
          chain exists.
        the links consist of offset addresses only, the segment being the same
          for all buffers in the chain.
SeeAlso: #01649,#01650,#01652

Bitfields for DOS 4.0-6.0 disk buffer flags:
Bit(s)  Description     (Table 01656)
 7      remote buffer
 6      buffer dirty
 5      buffer has been referenced (reserved in DOS 5+)
 4      search data buffer (only valid if remote buffer)
 3      sector in data area
 2      sector in a directory, either root or subdirectory
 1      sector in FAT
 0      reserved
SeeAlso: #01651

Format of DOS 5.0-6.0 disk buffer info:
Offset  Size    Description     (Table 01657)
 00h    DWORD   pointer to least-recently-used buffer header (may be in HMA)
                (see #01655)
 04h    WORD    number of dirty disk buffers
 06h    DWORD   pointer to lookahead buffer, zero if not present
 0Ah    WORD    number of lookahead sectors, else zero (the y in BUFFERS=x,y)
 0Ch    BYTE    buffer location
                00h base memory, no workspace buffer
                01h HMA, workspace buffer in base memory
 0Dh    DWORD   pointer to one-segment workspace buffer in base memory
 11h  3 BYTEs   unused
 14h    WORD    ???
 16h    BYTE    flag: INT 24 fail while making an I/O status call
 17h    BYTE    temp storage for user memory allocation strategy during EXEC
 18h    BYTE    counter: number of INT 21 calls for which A20 is off
 19h    BYTE    bit flags
                bit 0: ???
                bit 1: SWITCHES=/W specified in CONFIG.SYS (don't load
                        WINA20.SYS when MS Windows 3.0 starts)
                bit 2: in EXEC state (INT 21/AX=4B05h)
 1Ah    WORD    offset of unpack code start (used only during INT 21/AX=4B05h)
 1Ch    BYTE    bit 0 set iff UMB MCB chain linked to normal MCB chain
 1Dh    WORD    minimum paragraphs of memory required by program being EXECed
 1Fh    WORD    segment of first MCB in upper memory blocks or FFFFh if DOS
                  memory chain in base 640K only (first UMB MCB usually at
                  9FFFh, locking out video memory with a DOS-owned memory
                  block)
                the MCB this word points at contains a valid link into high
                  memory even if it is marked with a 'Z' indicating the last
                  memory block
 21h    WORD    paragraph from which to start scanning during memory allocation
SeeAlso: #01652,#01653

(Table 01658)
Call IFS utility function entry point with:
        AH = 20h miscellaneous functions
            AL = 00h get date
                Return: CX = year
                        DH = month
                        DL = day
            AL = 01h get process ID and computer ID
                Return: BX = current PSP segment
                        DX = active network machine number
            AL = 05h get file system info
                ES:DI -> 16-byte info buffer
                Return: buffer filled
                        Offset  Size    Description
                         00h  2 BYTEs   unused
                         02h    WORD    number of SFTs (actually counts only
                                        the first two file table arrays)
                         04h    WORD    number of FCB table entries
                         06h    WORD    number of proctected FCBs
                         08h  6 BYTEs   unused
                         0Eh    WORD    largest sector size supported
            AL = 06h get machine name
                ES:DI -> 18-byte buffer for name
                Return: buffer filled with name starting at offset 02h
            AL = 08h get sharing retry count
                Return: BX = sharing retry count
            AL = other
                Return: CF set
        AH = 21h get redirection state
                BH = type (03h disk, 04h printer)
                Return: BH = state (00h off, 01h on)
        AH = 22h ??? some sort of time calculation
                AL = 00h ???
                    nonzero ???
        AH = 23h ??? some sort of time calculation
        AH = 24h compare filenames
            DS:SI -> first ASCIZ filename
            ES:DI -> second ASCIZ filename
            Return: ZF set if files are same ignoring case and / vs \
        AH = 25h normalize filename
            DS:SI -> ASCIZ filename
            ES:DI -> buffer for result
            Return: filename uppercased, forward slashes changed to backslashes
        AH = 26h get DOS stack
            Return: DS:SI -> top of stack
                    CX = size of stack in bytes
        AH = 27h increment InDOS flag
        AH = 28h decrement InDOS flag
Note:   IFS drivers which do not wish to implement functions 20h or 24h-28h may
          pass them on to the default handler pointed at by [LoL+37h]
SeeAlso: #01659,#01660

Format of IFS driver list:
Offset  Size    Description     (Table 01659)
 00h    DWORD   pointer to next driver header
 04h  8 BYTEs   IFS driver name (blank padded), as used by FILESYS command
 0Ch  4 BYTEs   ???
 10h    DWORD   pointer to IFS utility function entry point (see #01658)
                call with ES:BX -> IFS request (see #01660)
 14h    WORD    offset in header's segment of driver entry point
        ???
SeeAlso: #01658,#01660

Format of IFS request block:
Offset  Size    Description     (Table 01660)
 00h    WORD    total size in bytes of request
 02h    BYTE    class of request
                02h ???
                03h redirection
                04h ???
                05h file access
                06h convert error code to string
                07h ???
 03h    WORD    returned DOS error code
 05h    BYTE    IFS driver exit status
                00h success
                01h ???
                02h ???
                03h ???
                04h ???
                FFh internal failure
 06h 16 BYTEs   ???
---request class 02h---
 16h    BYTE    function code
                04h ???
 17h    BYTE    unused???
 18h    DWORD   pointer to ???
 1Ch    DWORD   pointer to ???
 20h  2 BYTEs   ???
---request class 03h---
 16h    BYTE    function code
 17h    BYTE    ???
 18h    DWORD   pointer to ???
 1Ch    DWORD   pointer to ???
 22h    WORD    returned ???
 24h    WORD    returned ???
 26h    WORD    returned ???
 28h    BYTE    returned ???
 29h    BYTE    unused???
---request class 04h---
 16h    DWORD   pointer to ???
 1Ah    DWORD   pointer to ???
---request class 05h---
 16h    BYTE    function code
                01h flush disk buffers
                02h get disk space
                03h MKDIR
                04h RMDIR
                05h CHDIR
                06h delete file
                07h rename file
                08h search directory
                09h file open/create
                0Ah LSEEK
                0Bh read from file
                0Ch write to file
                0Dh lock region of file
                0Eh commit/close file
                0Fh get/set file attributes
                10h printer control
                11h ???
                12h process termination
                13h ???
        ---class 05h function 01h---
         17h  7 BYTEs   ???
         1Eh    DWORD   pointer to ???
         22h  4 BYTEs   ???
         26h    BYTE    ???
         27h    BYTE    ???
        ---class 05h function 02h---
         17h  7 BYTEs   ???
         1Eh    DWORD   pointer to ???
         22h  4 BYTEs   ???
         26h    WORD    returned total clusters
         28h    WORD    returned sectors per cluster
         2Ah    WORD    returned bytes per sector
         2Ch    WORD    returned available clusters
         2Eh    BYTE    returned ???
         2Fh    BYTE    ???
        ---class 05h functions 03h,04h,05h---
         17h  7 BYTEs   ???
         1Eh    DWORD   pointer to ???
         22h  4 BYTEs   ???
         26h    DWORD   pointer to directory name
        ---class 05h function 06h---
         17h  7 BYTEs   ???
         1Eh    DWORD   pointer to ???
         22h  4 BYTEs   ???
         26h    WORD    attribute mask
         28h    DWORD   pointer to filename
        ---class 05h function 07h---
         17h  7 BYTEs   ???
         1Eh    DWORD   pointer to ???
         22h  4 BYTEs   ???
         26h    WORD    attribute mask
         28h    DWORD   pointer to source filespec
         2Ch    DWORD   pointer to destination filespec
        ---class 05h function 08h---
         17h  7 BYTEs   ???
         1Eh    DWORD   pointer to ???
         22h  4 BYTEs   ???
         26h    BYTE    00h FINDFIRST
                        01h FINDNEXT
         28h    DWORD   pointer to FindFirst search data + 01h if FINDNEXT
         2Ch    WORD    search attribute if FINDFIRST
         2Eh    DWORD   pointer to filespec if FINDFIRST
        ---class 05h function 09h---
         17h  7 BYTEs   ???
         1Eh    DWORD   pointer to ???
         22h    DWORD   pointer to IFS open file structure (see #01661)
         26h    WORD    ???  \ together, specify open vs. create, whether or
         28h    WORD    ???  / not to truncate
         2Ah  4 BYTEs   ???
         2Eh    DWORD   pointer to filename
         32h  4 BYTEs   ???
         36h    WORD    file attributes on call
                        returned ???
         38h    WORD    returned ???
        ---class 05h function 0Ah---
         17h  7 BYTEs   ???
         1Eh    DWORD   pointer to ???
         22h    DWORD   pointer to IFS open file structure (see #01661)
         26h    BYTE    seek type (02h = from end)
         28h    DWORD   offset on call
                        returned new absolute position
        ---class 05h functions 0Bh,0Ch---
         17h  7 BYTEs   ???
         1Eh    DWORD   pointer to ???
         22h    DWORD   pointer to IFS open file structure (see #01661)
         28h    WORD    number of bytes to transfer
                        returned bytes actually transferred
         2Ah    DWORD   transfer address
        ---class 05h function 0Dh---
         17h  7 BYTEs   ???
         1Eh    DWORD   pointer to ???
         22h    DWORD   pointer to IFS open file structure (see #01661)
         26h    BYTE    file handle???
         27h    BYTE    unused???
         28h    WORD    ???
         2Ah    WORD    ???
         2Ch    WORD    ???
         2Eh    WORD    ???
        ---class 05h function 0Eh---
         17h  7 BYTEs   ???
         1Eh    DWORD   pointer to ???
         22h    DWORD   pointer to IFS open file structure (see #01661)
         26h    BYTE    00h commit file
                        01h close file
         27h    BYTE    unused???
        ---class 05h function 0Fh---
         17h  7 BYTEs   ???
         1Eh    DWORD   pointer to ???
         22h  4 BYTEs   ???
         26h    BYTE    02h GET attributes
                        03h PUT attributes
         27h    BYTE    unused???
         28h 12 BYTEs   ???
         34h    WORD    search attributes???
         36h    DWORD   pointer to filename
         3Ah    WORD    (GET) returned ???
         3Ch    WORD    (GET) returned ???
         3Eh    WORD    (GET) returned ???
         40h    WORD    (GET) returned ???
         42h    WORD    (PUT) new attributes
                        (GET) returned attributes
        ---class 05h function 10h---
         17h  7 BYTEs   ???
         1Eh    DWORD   pointer to ???
         22h    DWORD   pointer to IFS open file structure (see #01661)
         26h    WORD    ???
         28h    DWORD   pointer to ???
         2Ch    WORD    ???
         2Eh    BYTE    ???
         2Fh    BYTE    subfunction
                        01h get printer setup
                        03h ???
                        04h ???
                        05h ???
                        06h ???
                        07h ???
                        21h set printer setup
        ---class 05h function 11h---
         17h  7 BYTEs   ???
         1Eh    DWORD   pointer to ???
         22h    DWORD   pointer to IFS open file structure (see #01661)
         26h    BYTE    subfunction
         27h    BYTE    unused???
         28h    WORD    ???
         2Ah    WORD    ???
         2Ch    WORD    ???
         2Eh    BYTE    ???
         2Fh    BYTE    ???
        ---class 05h function 12h---
         17h 15 BYTEs   unused???
         26h    WORD    PSP segment
         28h    BYTE    type of process termination
         29h    BYTE    unused???
        ---class 05h function 13h---
         17h 15 BYTEs   unused???
         26h    WORD    PSP segment
---request class 06h---
 16h    DWORD   returned pointer to string corresponding to error code at 03h
 1Ah    BYTE    returned ???
 1Bh    BYTE    unused
---request class 07h---
 16h    DWORD   pointer to IFS open file structure (see #01661)
 1Ah    BYTE    ???
 1Bh    BYTE    unused???
SeeAlso: #01659,#01658,#01661

Format of IFS open file structure:
Offset  Size    Description     (Table 01661)
 00h    WORD    ???
 02h    WORD    device info word
 04h    WORD    file open mode
 06h    WORD    ???
 08h    WORD    file attributes
 0Ah    WORD    owner's network machine number
 0Ch    WORD    owner's PSP segment
 0Eh    DWORD   file size
 12h    DWORD   current offset in file
 16h    WORD    file time
 18h    WORD    file date
 1Ah 11 BYTEs   filename in FCB format
 25h    WORD    ???
 27h    WORD    hash value of SFT address
                (low word of linear address + segment&F000h)
 29h  3 WORDs   network info from SFT
 2Fh    WORD    ???

Format of one item in DOS 4.0+ list of special program names:
Offset  Size    Description     (Table 01662)
 00h    BYTE    length of name (00h = end of list)
 01h  N BYTEs   name in format name.ext
 N    2 BYTEs   DOS version to return for program (major,minor)
                (see AH=30h,INT 2F/AX=122Fh)
---DOS 4 only---
 N+2    BYTE    number of times to return fake version number (FFh = always)
Note:   if the name of the executable for the program making the DOS "get
          version" call matches one of the names in this list, DOS returns the
          specified version rather than the true version number
--------v-215252-----------------------------
INT 21 - VIRUS - "516"/"Leapfrog" - INSTALLATION CHECK
        AX = 5252h
Return: BX = FFEEh if resident
SeeAlso: AX=4BFFh"Cascade",AX=58CCh
--------D-2153-------------------------------
INT 21 - DOS 2+ internal - TRANSLATE BIOS PARAMETER BLOCK TO DRIVE PARAM BLOCK
        AH = 53h
        DS:SI -> BIOS Parameter Block (see #01663)
        ES:BP -> buffer for Drive Parameter Block (see #01395 at AH=32h)
            DBP drive byte must be set to valid drive (Windows95-OSR2)
        ---Windows95---
        CX = signature 4558h ('EX') for FAT32 extended BPB/DPB (see #01664)
        DX = signature 4152h ('AR') for FAT32 extended BPB/DPB
Return: ES:BP buffer filled
Notes:  for DOS 3.0+, the cluster at which to start searching is set to 0000h
          and the number of free clusters is set to FFFFh (unknown)
        if the number of sectors per cluster is set to zero, MS-DOS will hang
          at startup because it computes the internally-used shift count by
          shifting this value right until the carry flag is set; since this
          will never happen when the field is zero, MS-DOS hangs
        not supported by Windows NT 3.1

Format of BIOS Parameter Block:
Offset  Size    Description     (Table 01663)
 00h    WORD    number of bytes per sector
 02h    BYTE    number of sectors per cluster
 03h    WORD    number of reserved sectors at start of disk
 05h    BYTE    number of FATs
 06h    WORD    number of entries in root directory
 08h    WORD    total number of sectors
                for DOS 4.0+, set to zero if partition >32M, then set DWORD at
                  15h to actual number of sectors
 0Ah    BYTE    media ID byte (see #01356)
 0Bh    WORD    number of sectors per FAT
---DOS 2.13---
 0Dh    WORD    number of sectors per track
 0Fh    WORD    number of heads
 11h    WORD    number of hidden sectors
---DOS 3.0+ ---
 0Dh    WORD    number of sectors per track
 0Fh    WORD    number of heads
 11h    DWORD   number of hidden sectors
 15h 11 BYTEs   reserved
---DOS 4.0+ ---
 15h    DWORD   total number of sectors if word at 08h contains zero
 19h  6 BYTEs   ???
 1Fh    WORD    number of cylinders
 21h    BYTE    device type
 22h    WORD    device attributes (removable or not, etc)
---DR DOS 5+ ---
 15h    DWORD   total number of sectors if word at 08h contains zero
 19h  6 BYTEs   reserved
---European MS-DOS 4.00---
 15h    DWORD   total number of sectors if word at 08h contains zero
                (however, this DOS does not actually implement >32M partitions)
SeeAlso: #01395,#01664

Format of Extended BIOS Parameter Block:
Offset  Size    Description     (Table 01664)
 00h 25 BYTEs   same as standard DOS 4-6 BPB (see #01663)
 19h    DWORD   sectors per FAT if WORD at 0Bh is 0000h
 1Dh    WORD    extended flags
                bit 7: do not mirror active FAT to inactive FATs
                bits 6-4: reserved (0)
                bits 3-0: the 0-based FAT number of the active FAT
                    (if mirroring disabled)
 1Fh    WORD    file system version (high byte=major, low byte=minor)
                0000h = Win95-OSR2
 21h    DWORD   starting cluster number of root directory
 25h    WORD    file system information sector number (see also #01788)
                FFFFh if none
 27h    WORD    sector number of backup boot sector (FFFFh if none)
 29h  6 WORDs   reserved
SeeAlso: #01560,#01787
--------D-2154-------------------------------
INT 21 - DOS 2+ - GET VERIFY FLAG
        AH = 54h
Return: AL = verify flag
            00h off
            01h on (all disk writes verified after writing)
SeeAlso: AH=2Eh
--------v-2154--BX4475-----------------------
INT 21 - VIRUS - "Dual_GtM"/"Ganeu" - INSTALLATION CHECK
        AH = 54h
        BX = 4475h ("Du")
        CX = 616Ch ("al")
Return: BX = 4774h ("Gt") and CX = 4D21h ("M!") if resident
SeeAlso: AX=50FDh"VIRUS",AX=5454h"VIRUS"
--------v-215454-----------------------------
INT 21 - VIRUS - "Dudley" - INSTALLATION CHECK
        AX = 5454h
Return: AX = 0000h if resident
SeeAlso: AX=50FDh"VIRUS",AH=54h/BX=4475h"VIRUS",AX=7BCEh"VIRUS"
--------D-2155-------------------------------
INT 21 - DOS 2+ internal - CREATE CHILD PSP
        AH = 55h
        DX = segment at which to create new PSP
        SI = (DOS 3.0+) value to place in memory size field at DX:[0002h]
Return: AL destroyed
Notes:  creates a "child" PSP rather than making an exact copy of the current
          PSP; the new PSP's parent pointer is set to the current PSP and the
          reference count for each inherited file is incremented
        (DOS 2.0+) sets current PSP to DX
        (DOS 3.0+) marks "no inherit" file handles as closed in child PSP
        this function is implemented using the same code as AH=26h, so unlike
          other DOS 2+ functions, it does not return status in CF, instead
          returning status in AL as DOS 1.x functions do (but it never puts an
          explicit return value in AL)
SeeAlso: AH=26h,AH=50h
--------D-2156-------------------------------
INT 21 - DOS 2+ - "RENAME" - RENAME FILE
        AH = 56h
        DS:DX -> ASCIZ filename of existing file (no wildcards, but see below)
        ES:DI -> ASCIZ new filename (no wildcards)
        CL = attribute mask (server call only, see below)
Return: CF clear if successful
        CF set on error
            AX = error code (02h,03h,05h,11h) (see #01680)
Notes:  allows move between directories on same logical volume
        this function does not set the archive attribute
          (see #01420 at AX=4301h), which results in incremental backups not
          backing up the file under its new name
        open files should not be renamed
        (DOS 2.x only) this function renames file by creating a new directory
          entry with the new name, then marking the old entry deleted
        (DOS 3.0+) allows renaming of directories
        (DOS 3.1+) wildcards are allowed if invoked via AX=5D00h, in which case
          error 12h (no more files) is returned on success, and both source and
          destination specs must be canonical (as returned by AH=60h).
          Wildcards in the destination are replaced by the corresponding char
          of each source file being renamed.  Under DOS 3.x, the call will fail
          if the destination wildcard is *.* or equivalent; under DR DOS 5.0,
          the call will fail with error code 03h if any wildcards are used.
          When invoked via AX=5D00h, only those files matching the attribute
          mask in CL are renamed.
        under the FlashTek X-32 DOS extender, the old-name pointer is in DS:EDX
          and the new-name pointer is in ES:EDI (DS must equal ES)
BUG:    (DR DOS 3.41) when invoked via AX=5D00h, this function will generate
          a new directory entry with the new name (including any wildcards)
          which can only be removed with a sector editor
SeeAlso: AH=17h,AX=4301h,AX=43FFh/BP=5053h,AX=5D00h,AH=60h,AX=7156h
SeeAlso: AX=F257h/SF=04h
--------v-215643------------------------
INT 21 - VIRUS - "PS-MPC.Gold" - INSTALLATION CHECK
        AX = 5643h  ('VC')
Return: AX = 5053h  ('PS') if resident
SeeAlso: AX=33E0h"VIRUS",AX=5741h"VIRUS",AX=6303h"VIRUS"
--------D-215700-----------------------------
INT 21 - DOS 2+ - GET FILE'S LAST-WRITTEN DATE AND TIME
        AX = 5700h
        BX = file handle
Return: CF clear if successful
            CX = file's time (see #01665)
            DX = file's date (see #01666)
        CF set on error
            AX = error code (01h,06h) (see #01680)
Note:   under DR DOS 3.41 and 5.0, this function returns 0 (no date/time) for
          character devices; MS-DOS returns date and time of opening
SeeAlso: AX=5701h,AX=5704h"Windows95"

Bitfields for file time:
Bit(s)  Description     (Table 01665)
 15-11  hours (0-23)
 10-5   minutes
 4-0    seconds/2

Bitfields for file date:
Bit(s)  Description     (Table 01666)
 15-9   year - 1980
 8-5    month
 4-0    day
--------D-215701-----------------------------
INT 21 - DOS 2+ - SET FILE'S LAST-WRITTEN DATE AND TIME
        AX = 5701h
        BX = file handle
        CX = new time (see #01665)
        DX = new date (see #01666)
Return: CF clear if successful
        CF set on error
            AX = error code (01h,06h) (see #01680)
SeeAlso: AX=5700h,AX=5705h"Windows95",AX=5707h"Windows95"
--------D-215702-----------------------------
INT 21 - DOS 4.x only - GET EXTENDED ATTRIBUTES FOR FILE
        AX = 5702h
        BX = file handle
        CX = size of result buffer or 0000h
        DS:SI -> EAP list (see #01667)
        ES:DI -> buffer for returned EAV list (see #01670)
Return: CF clear if successful
            CX = size of returned data
        CF set on error
            AX = error code (see #01680)
Desc:   get the current value of one or more extended attributes
Notes:  if CX=0000h on entry, ES:DI is ignored and no data is actually
          returned, only the amount of data which is available
        the default DOS 4 behavior is to return a single word of 0000h (no
          structures) in the result buffer if CX>=0002h on entry; this
          functionality was apparently never released to the public
SeeAlso: AX=5703h,AX=5704h,AH=6Eh,INT 2F/AX=112Dh

Format of EAP (extended attribute properties) list:
Offset  Size    Description     (Table 01667)
 00h    WORD    number of EAP structures following
 02h    var     array of EAP structures (see #01668)
SeeAlso: #01670

Format of EAP (extended attribute property) structure:
Offset  Size    Description     (Table 01668)
 00h    BYTE    attribute type
                01h boolean (either 00h or 01h)
                02h number (BYTE, WORD, or DWORD)
                03h string
                04h date stamp
                05h time stamp
 01h    WORD    EAP flags (see #01669)
 03h    BYTE    size of reference string (name)
 04h  N BYTEs   reference string

Bitfields for EAP flags:
Bit(s)  Description     (Table 01669)
 12     unchangeable
 13     ignore
 14     unchangeable
 15     used by COMMAND.COM for code page, but not understood by ATTRIB

Format of EAV (extended attribute value) list:
Offset  Size    Description     (Table 01670)
 00h    WORD    number of EAV structures following
 02h    var     array of Extended Attribute Value structures (see #01671)
SeeAlso: #01667

Format of Extended Attribute Value structures:
Offset  Size    Description     (Table 01671)
 00h  4 BYTEs   ???
 04h    BYTE    size of reference string
 05h    WORD    size of value
 07h    var     reference string
        var     value
--------O-215702-----------------------------
INT 21 - OS/2 v1.1+ Family API - DosQFileInfo
        AX = 5702h
        BX = file handle
        CX = size of buffer for information
        DX = level of information
            0001h standard file information (see #01672)
            0002h Query EA Size (see #01672)
            0003h Query EAs from List (see #01673)
            0004h Query All EAs (see #01673)
        ES:DI -> buffer for information (see #01672,#01673)
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AX=5702h/BX=FFFFh,AX=5703h"OS/2",AH=6Dh"OS/2"

Format of OS/2 DosQFileInfo:
Offset  Size    Description     (Table 01672)
 00h    WORD    creation date
 02h    WORD    creation time
 04h    WORD    last access date
 06h    WORD    last access time
 08h    WORD    last write date
 0Ah    WORD    last write time
 0Ch    DWORD   file size in bytes
 10h    DWORD   allocated space in bytes
 14h    WORD    file attributes
---level 2 only---
 16h    DWORD   size of Extended Attributes in byte
SeeAlso: #01673,#01676

Format of OS/2 DosQFileInfo, EAOP structure:
Offset  Size    Description     (Table 01673)
 00h    DWORD   pointer to general EA list (see #01674)
 04h    DWORD   pointer to buffer for full EA list, with length field set
 08h    DWORD   (ret) error
Note:   for info level 3, the first pointer must contain the address of a
          list of the Extended Attributes to be retrieved; for info level 4,
          it should be 0000h:0000h
SeeAlso: #01672,#01676

Format of OS/2 DosQFileInfo, General EA List:
Offset  Size    Description     (Table 01674)
 00h    DWORD   (call) total size of list in bytes (including this field)
                (ret) number of bytes actually used (including this field)
 04h    var     Extended Attribute entries (see #01675) [packed arrray]

Format of OS/2 DosQFileInfo, General EA entry:
Offset  Size    Description     (Table 01675)
 00h    BYTE    length of Extended Attribute name (excluding terminating NUL)
 01h  N BYTEs   EA name
        BYTE    00h
SeeAlso: #01674

Format of OS/2 DosQFileInfo, Full EA List:
Offset  Size    Description     (Table 01676)
 00h    DWORD   (call) total size of list in bytes (including this field)
                (ret) number of bytes actually used (including this field)
 04h    var     Extended Attribute data (see #01677) [packed array]
SeeAlso: #01672,#01673

Format of OS/2 Extended Attribute data (struct FEA):
Offset  Size    Description     (Table 01677)
 00h    BYTE    flags
                bit 7: critical EA
 01h    BYTE    length of Extended Attribute name (excluding terminating NUL)
 02h    WORD    length of Extended Attribute value
 04h  N BYTEs   EA name
        BYTE    00h
      M BYTEs   EA value
--------O-215702BXFFFF-----------------------
INT 21 - OS/2 v1.1+ Compatibility Box Family API - DosQPathInfo
        AX = 5702h
        BX = FFFFh
        CX = size of buffer for information
        DX = level of information (0002h)
        DS:SI -> filename
        ES:DI -> buffer for FAPI path information (see #01678)
Return: CF clear if successful
            AL = 00h
        CF set on error
            AX = error code
SeeAlso: AX=5702h"OS/2",AX=5703h/BX=FFFFh

Format of FAPI path information:
Offset  Size    Description     (Table 01678)
 00h 22 BYTEs   ???
 16h    DWORD   extended attribute size (none present if less than 5)
--------D-215703-----------------------------
INT 21 - DOS 4.x only - GET EXTENDED ATTRIBUTE PROPERTIES
        AX = 5703h
        BX = file handle
        CX = size of result buffer or 0000h
        ES:DI -> result buffer
Return: CF clear if successful
            CX = size of returned data
        CF set on error
            AX = error code (see #01680)
        ES:DI -> zero word (DOS 4.0) if CX >= 2 on entry
Desc:   get a list of the extended attributes which are defined for the
          specified file
Notes:  if CX=0000h on entry, ES:DI is ignored and no data is actually
          returned, only the amount of data which is available
        the default DOS 4 behavior is to return a trivial EAP list consisting
          of the single word 0000h (no EAP structures) if CX>=0002h on entry;
          this functionality was apparently never released to the public
SeeAlso: AX=5702h,AX=5704h,AH=6Eh,INT 2F/AX=112Dh
--------O-215703-----------------------------
INT 21 - OS/2 v1.1+ Family API - DosSetFileInfo
        AX = 5703h
        BX = file handle
        CX = size of information buffer
        DX = level of information
        ES:DI -> information buffer
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AX=5702h"OS/2",AX=5703h/BX=FFFFh
--------O-215703BXFFFF-----------------------
INT 21 - OS/2 v1.1+ Family API - DosSetPathInfo
        AX = 5703h
        BX = FFFFh
        CX = size of information buffer
        DX = level of information
        DS:SI -> filename
        ES:DI -> information buffer
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AX=5702h/BX=FFFFh,AX=5703h"OS/2"
--------D-215704-----------------------------
INT 21 - DOS 4.x only - SET EXTENDED ATTRIBUTES
        AX = 5704h
        BX = file handle
        ES:DI -> EAV list (see #01670)
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680)
Note:   the default DOS 4 behavior is to do nothing and return successfully;
          this functionality was apparently never released to the public
SeeAlso: AX=5702h,AX=5703h,INT 2F/AX=112Dh
--------D-215704-----------------------------
INT 21 - MS-DOS 7/Windows95 - GET LAST ACCESS DATE AND TIME
        AX = 5704h
        BX = file handle
Return: CF clear if successful
            DX = last access date (see #01666)
            CX = last access time (currently always 0000h)
        CF set on error
            AX = error code
SeeAlso: AX=5701h,AX=5705h,AX=5706h
--------D-215705-----------------------------
INT 21 - MS-DOS 7/Windows95 - SET LAST ACCESS DATE AND TIME
        AX = 5705h
        BX = file handle
        CX = new last-access time (currently not supported, must be 0000h)
        DX = new last-access date (see #01666)
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AX=5700h,AX=5704h"Windows95",AX=5707h
--------D-215706-----------------------------
INT 21 - MS-DOS 7/Windows95 - GET CREATION DATE AND TIME
        AX = 5706h
        BX = file handle
Return: CF clear if successful
            CX = creation time (see #01665)
            DX = creation date (see #01666)
            SI = number of 10-millisecond units past time in CX (0-199)
        CF set on error
            AX = error code
SeeAlso: AX=5701h,AX=5704h"Windows95",AX=5707h
--------D-215707-----------------------------
INT 21 - MS-DOS 7/Windows95 - SET CREATION DATE AND TIME
        AX = 5707h
        BX = file handle
        CX = new creation time (see #01665)
        DX = new creation date (see #01666)
        SI = new creation time: 10-millisecond units past time in CX (0-199)
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AX=5700h,AX=5705h,AX=5706h
--------v-215741-----------------------------
INT 21 - VIRUS - "WARP" -INSTALLATION CHECK
        AX = 5741h
Return: AX = 5250h if resident
SeeAlso: AX=5643h"VIRUS",AX=58CCh"VIRUS"
--------U-215757BX5757-----------------------
INT 21 U - IBM Genie - Resident Manager - INSTALLATION CHECK
        AX = 5757h
        BX = 5757h
Return: AX = 0000h if installed
            BX = ???
            DX = ???
            DS:SI -> list of 27 DWORD entry point addresses
Program: IBM Genie is a set of utility TSRs by Helix Software
Note:   other functions possible if BX <> 5757h, but details not yet available
----------215758-----------------------------
INT 21 U - Headroom - API
        AX = 5758h
        BL = function
            00h ???
            01h get Headroom location
                Return: CF clear if installed
                            AX = PSP segment of Headroom TSR
                            BX = paragraphs of memory used by Headroom
                        CF set if not (normal DOS return)
                Note:   this function is also used as an installation check
            02h get INT 21 handler
                Return: CF clear
                        ES:BX -> Headroom's INT 21 handler
                Note: also sets unknown flag
            03h launch application???
                DS:SI -> 233-byte application record
                Return: ???
            04h ???
                ???
                Return: CF clear
            05h get swap directory
                Return: CF clear
                        DX:AX -> ASCIZ swap directory name
            06h ???
                DX = ???
                Return: CF clear
            07h ???
            08h ???
            09h get current application
                Return: BX = application number
            0Ah ???
                DX = application number
                DS:SI = ???
                Return: ???
            0Bh ???
            0Ch ???
                DX = application number
                ???
                Return: ???
            0Dh ???
                DX = application number
                ???
                Return: ???
            0Eh get ???
                Return: CF clear
                        AX = ???
            0Fh set ??? flag
            10h clear ??? flag
            11h find application by name
                DS:SI -> ASCIZ application name
                Return: CF clear
                        AX = application number or FFFFh if not loaded
            12h ???
                DX = application number
                Return: CF clear
                        ???
            13h ???
                Return: CF clear
            14h ???
                same as function 13h
            15h set ???
                DX = ???
            16h get ???
                Return: AX = ??? set by function 15h
            17h get ???
                Return: BX = ???
                        CX = ??? (may be pointer in BX:CX)
            18h BUG: branches incorrectly due to fencepost error
Program: Headroom is a TSR/task switcher by Helix Software
SeeAlso: AX=4C57h,AX=5757h,INT 2F/AX=5758h
--------D-2158-------------------------------
INT 21 - DOS 2.11+ - GET OR SET MEMORY ALLOCATION STRATEGY
        AH = 58h
        AL = subfunction
            00h get allocation strategy
                Return: AX = current strategy (see #01679)
            01h set allocation strategy
                BL = new allocation strategy (see #01679)
                BH = 00h (DOS 5+)
Return: CF clear if successful
        CF set on error
            AX = error code (01h) (see #01680)
Notes:  the Set subfunction accepts any value in BL for DOS 3.x and 4.x;
          2 or greater means last fit
        the Get subfunction returns the last value set
        setting an allocation strategy involving high memory does not
          automatically link in the UMB memory chain; this must be done
          explicitly with AX=5803h in order to actually allocate high memory
        a program which changes the allocation strategy should restore it
          before terminating
        Toshiba MS-DOS v2.11 supports subfunctions 00h and 01h, as does the
          TI Professional MS-DOS v2.13
        DR DOS 3.41 reportedly reverses subfunctions 00h and 01h
SeeAlso: AH=48h,AH=49h,AH=4Ah,INT 2F/AX=4310h"XMS",INT 67/AH=3Fh

(Table 01679)
Values for DOS memory allocation strategy:
 00h low memory first fit
 01h low memory best fit
 02h low memory last fit
---DOS 5+ ---
 40h high memory first fit
 41h high memory best fit
 42h high memory last fit
 80h first fit, try high then low memory
 81h best fit, try high then low memory
 82h last fit, try high then low memory
--------D-2158-------------------------------
INT 21 - DOS 5+ - GET OR SET UMB LINK STATE
        AH = 58h
        AL = subfunction
            02h get UMB link state
                Return: AL = current link state
                            00h UMBs not part of DOS memory chain
                            01h UMBs in DOS memory chain
            03h set UMB link state
                BX = new link state
                    0000h remove UMBs from DOS memory chain
                    0001h add UMBs to DOS memory chain
Return: CF clear if successful
        CF set on error
            AX = error code (01h) (see #01680)
Notes:  a program which changes the UMB link state should restore it before
          terminating
        UMBs will only be available if CONFIG.SYS contains the line DOS=UMB,
          the UMBs have been linked into the memory chain with AX=5803h, and
          the allocation strategy has been set to include high memory with
          AX=5801h
SeeAlso: #01687,#02766 at INT 2F/AX=4310h
--------v-2158CC-----------------------------
INT 21 - VIRUS - "1067"/"Headcrash" - INSTALLATION CHECK
        AX = 58CCh
Return: CF clear if resident
SeeAlso: AX=5741h"VIRUS",AX=5643h,AX=5252h,AX=58DDh,AX=6303h"VIRUS",AX=6969h
--------v-2158DD-----------------------------
INT 21 - VIRUS - "1067"/"Headcrash" - GET ORIGINAL INT 21h VECTOR
        AX = 58DDh
Return: CX = code segment of virus
        ES:BX = old INT 21h vector
SeeAlso: AX=5252h,AX=58CCh,AX=6969h
--------D-2159--BX0000-----------------------
INT 21 - DOS 3.0+ - GET EXTENDED ERROR INFORMATION
        AH = 59h
        BX = 0000h
Return: AX = extended error code (see #01680)
        BH = error class (see #01682)
        BL = recommended action (see #01683)
        CH = error locus (see #01684)
        ES:DI may be pointer (see #01681, #01680)
        CL, DX, SI, BP, and DS destroyed
Notes:  functions available under DOS 2.x map the true DOS 3.0+ error code into
          one supported under DOS 2.x
        you should call this function to retrieve the true error code when an
          FCB or DOS 2.x call returns an error
        under DR DOS 5.0, this function does not use any of the DOS-internal
          stacks and may thus be called at any time
SeeAlso: AH=59h/BX=0001h,AX=5D0Ah,INT 2F/AX=122Dh

(Table 01680)
Values for DOS extended error code:
 00h (0)   no error
 01h (1)   function number invalid
 02h (2)   file not found
 03h (3)   path not found
 04h (4)   too many open files (no handles available)
 05h (5)   access denied
 06h (6)   invalid handle
 07h (7)   memory control block destroyed
 08h (8)   insufficient memory
 09h (9)   memory block address invalid
 0Ah (10)  environment invalid (usually >32K in length)
 0Bh (11)  format invalid
 0Ch (12)  access code invalid
 0Dh (13)  data invalid
 0Eh (14)  reserved
 0Fh (15)  invalid drive
 10h (16)  attempted to remove current directory
 11h (17)  not same device
 12h (18)  no more files
---DOS 3.0+ ---
 13h (19)  disk write-protected
 14h (20)  unknown unit
 15h (21)  drive not ready
 16h (22)  unknown command
 17h (23)  data error (CRC)
 18h (24)  bad request structure length
 19h (25)  seek error
 1Ah (26)  unknown media type (non-DOS disk)
 1Bh (27)  sector not found
 1Ch (28)  printer out of paper
 1Dh (29)  write fault
 1Eh (30)  read fault
 1Fh (31)  general failure
 20h (32)  sharing violation
 21h (33)  lock violation
 22h (34)  disk change invalid (ES:DI -> media ID structure)(see #01681)
 23h (35)  FCB unavailable
 24h (36)  sharing buffer overflow
 25h (37)  (DOS 4.0+) code page mismatch
 26h (38)  (DOS 4.0+) cannot complete file operation (out of input)
 27h (39)  (DOS 4.0+) insufficient disk space
 28h-31h   reserved
 32h (50)  network request not supported
 33h (51)  remote computer not listening
 34h (52)  duplicate name on network
 35h (53)  network name not found
 36h (54)  network busy
 37h (55)  network device no longer exists
 38h (56)  network BIOS command limit exceeded
 39h (57)  network adapter hardware error
 3Ah (58)  incorrect response from network
 3Bh (59)  unexpected network error
 3Ch (60)  incompatible remote adapter
 3Dh (61)  print queue full
 3Eh (62)  queue not full
 3Fh (63)  not enough space to print file
 40h (64)  network name was deleted
 41h (65)  network: Access denied
 42h (66)  network device type incorrect
 43h (67)  network name not found
 44h (68)  network name limit exceeded
 45h (69)  network BIOS session limit exceeded
 46h (70)  temporarily paused
 47h (71)  network request not accepted
 48h (72)  network print/disk redirection paused
 49h (73)  network software not installed
            (LANtastic) invalid network version
 4Ah (74)  unexpected adapter close
            (LANtastic) account expired
 4Bh (75)  (LANtastic) password expired
 4Ch (76)  (LANtastic) login attempt invalid at this time
 4Dh (77)  (LANtastic v3+) disk limit exceeded on network node
 4Eh (78)  (LANtastic v3+) not logged in to network node
 4Fh (79)  reserved
 50h (80)  file exists
 51h (81)  reserved
 52h (82)  cannot make directory
 53h (83)  fail on INT 24h
 54h (84)  (DOS 3.3+) too many redirections
 55h (85)  (DOS 3.3+) duplicate redirection
 56h (86)  (DOS 3.3+) invalid password
 57h (87)  (DOS 3.3+) invalid parameter
 58h (88)  (DOS 3.3+) network write fault
 59h (89)  (DOS 4.0+) function not supported on network
 5Ah (90)  (DOS 4.0+) required system component not installed
 5Bh (91)  (NetWare4) timer server table overflowed
 5Ch (92)  (NetWare4) duplicate in timer service table
 5Dh (93)  (NetWare4) no items to work on
 5Fh (95)  (NetWare4) invalid interrupt
 64h (100) (MSCDEX) unknown error
 64h (100) (NetWare4) open semaphore limit exceeded
 65h (101) (MSCDEX) not ready
 65h (101) (NetWare4) exclusive semaphore is already owned
 66h (102) (MSCDEX) EMS memory no longer valid
 66h (102) (NetWare4) semaphore was set when close attempted
 67h (103) (MSCDEX) not High Sierra or ISO-9660 format
 67h (103) (NetWare4) too many exclusive semaphore requests
 68h (104) (MSCDEX) door open
 68h (104) (NetWare4) operation invalid from interrupt handler
 69h (105) (NetWare4) semaphore owner died
 6Ah (106) (NetWare4) semaphore limit exceeded
 6Bh (107) (NetWare4) insert drive B: disk into drive A:
 6Ch (108) (NetWare4) drive locked by another process
 6Dh (109) (NetWare4) broken pipe
 6Eh (110) (NetWare4) pipe open/create failed
 6Fh (111) (NetWare4) pipe buffer overflowed
 70h (112) (NetWare4) disk full
 71h (113) (NetWare4) no more search handles
 72h (114) (NetWare4) invalid target handle for dup2
 73h (115) (NetWare4) bad user virtual address
 74h (116) (NetWare4) error on console I/O
 75h (117) (NetWare4) unknown category code for IOCTL
 76h (118) (NetWare4) invalid value for verify flag
 77h (119) (NetWare4) level four driver not found
 78h (120) (NetWare4) invalid function number
 79h (121) (NetWare4) semaphore timeout
 7Ah (122) (NetWare4) buffer too small
 7Bh (123) (NetWare4) invalid character or bad file-system name
 7Ch (124) (NetWare4) unimplemented information level
 7Dh (125) (NetWare4) no volume label found
 7Eh (126) (NetWare4) module handle not found
 7Fh (127) (NetWare4) procedure address not found
 80h (128) (NetWare4) CWait found no children
 81h (129) (NetWare4) CWait children still running
 82h (130) (NetWare4) invalid operation for direct disk-access handle
 83h (131) (NetWare4) attempted seek to negative offset
 84h (132) (NetWare4) attempted to seek on device or pipe
 85h (133) (NetWare4) drive already has JOINed drives
 86h (134) (NetWare4) drive is already JOINed
 87h (135) (NetWare4) drive is already SUBSTed
 88h (136) (NetWare4) can not delete drive which is not JOINed
 89h (137) (NetWare4) can not delete drive which is not SUBSTed
 8Ah (138) (NetWare4) can not JOIN to a JOINed drive
 8Bh (139) (NetWare4) can not SUBST to a SUBSTed drive
 8Ch (140) (NetWare4) can not JOIN to a SUBSTed drive
 8Dh (141) (NetWare4) can not SUBST to a JOINed drive
 8Eh (142) (NetWare4) drive is busy
 8Fh (143) (NetWare4) can not JOIN/SUBST to same drive
 90h (144) (NetWare4) directory must not be root directory
 91h (145) (NetWare4) can only JOIN to empty directory
 92h (146) (NetWare4) path is already in use for SUBST
 93h (147) (NetWare4) path is already in use for JOIN
 94h (148) (NetWare4) path is in use by another process
 95h (149) (NetWare4) directory previously SUBSTituted
 96h (150) (NetWare4) system trace error
 97h (151) (NetWare4) invalid event count for DosMuxSemWait
 98h (152) (NetWare4) too many waiting on mutex
 99h (153) (NetWare4) invalid list format
 9Ah (154) (NetWare4) volume label too large
 9Bh (155) (NetWare4) unable to create another TCB
 9Ch (156) (NetWare4) signal refused
 9Dh (157) (NetWare4) segment discarded
 9Eh (158) (NetWare4) segment not locked
 9Fh (159) (NetWare4) invalid thread-ID address
 A0h (160) (NetWare4) bad environment pointer
 A1h (161) (NetWare4) invalid name passed to EXEC
 A2h (162) (NetWare4) signal already pending
 A3h (163) (NetWare4) ERROR_124 mapping
 A4h (164) (NetWare4) no more process slots
 A5h (165) (NetWare4) ERROR_124 mapping
 B0h (176) (MS-DOS 7.0) volume is not locked
 B1h (177) (MS-DOS 7.0) volume is locked in drive
 B2h (178) (MS-DOS 7.0) volume is not removable
 B4h (180) (MS-DOS 7.0) lock count has been exceeded
 B4h (180) (NetWare4) invalid segment number
 B5h (181) (MS-DOS 7.0) a valid eject request failed
 B5h (181) (NetWare4) invalid call gate
 B6h (182) (NetWare4) invalid ordinal
 B7h (183) (NetWare4) shared segment already exists
 B8h (184) (NetWare4) no child process to wait for
 B9h (185) (NetWare4) NoWait specified and child still running
 BAh (186) (NetWare4) invalid flag number
 BBh (187) (NetWare4) semaphore does not exist
 BCh (188) (NetWare4) invalid starting code segment
 BDh (189) (NetWare4) invalid stack segment
 BEh (190) (NetWare4) invalid module type (DLL can not be used as application)
 BFh (191) (NetWare4) invalid EXE signature
 C0h (192) (NetWare4) EXE marked invalid
 C1h (193) (NetWare4) bad EXE format (e.g. DOS-mode program)
 C2h (194) (NetWare4) iterated data exceeds 64K
 C3h (195) (NetWare4) invalid minimum allocation size
 C4h (196) (NetWare4) dynamic link from invalid Ring
 C5h (197) (NetWare4) IOPL not enabled
 C6h (198) (NetWare4) invalid segment descriptor privilege level
 C7h (199) (NetWare4) automatic data segment exceeds 64K
 C8h (200) (NetWare4) Ring2 segment must be moveable
 C9h (201) (NetWare4) relocation chain exceeds segment limit
 CAh (202) (NetWare4) infinite loop in relocation chain
 CBh (203) (NetWare4) environment variable not found
 CCh (204) (NetWare4) not current country
 CDh (205) (NetWare4) no signal sent
 CEh (206) (NetWare4) file name not 8.3
 CFh (207) (NetWare4) Ring2 stack in use
 D0h (208) (NetWare4) meta expansion is too long
 D1h (209) (NetWare4) invalid signal number
 D2h (210) (NetWare4) inactive thread
 D3h (211) (NetWare4) file system information not available
 D4h (212) (NetWare4) locked error
 D5h (213) (NetWare4) attempted to execute non-family API call in DOS mode
 D6h (214) (NetWare4) too many modules
 D7h (215) (NetWare4) nesting not allowed
 E6h (230) (NetWare4) non-existent pipe, or bad operation
 E7h (231) (NetWare4) pipe is busy
 E8h (232) (NetWare4) no data available for nonblocking read
 E9h (233) (NetWare4) pipe disconnected by server
 EAh (234) (NetWare4) more data available
 FFh (255) (NetWare4) invalid drive
SeeAlso: #01682,#01683,#01684,#01961

Format of media ID structure:
Offset  Size    Description     (Table 01681)
 00h 12 BYTEs   ASCIZ volume label of required disk
 0Ch    DWORD   serial number (DOS 4.0+)

(Table 01682)
Values for DOS Error Class:
 01h (1)  out of resource (storage space or I/O channels)
 02h (2)  temporary situation (file or record lock)
 03h (3)  authorization (denied access)
 04h (4)  internal (system software bug)
 05h (5)  hardware failure
 06h (6)  system failure (configuration file missing or incorrect)
 07h (7)  application program error
 08h (8)  not found
 09h (9)  bad format
 0Ah (10) locked
 0Bh (11) media error
 0Ch (12) already exists
 0Dh (13) unknown
SeeAlso: #01680,#01683,#01684

(Table 01683)
Values for DOS Suggested Action:
 01h    retry
 02h    delayed retry
 03h    prompt user to reenter input
 04h    abort after cleanup
 05h    immediate abort
 06h    ignore
 07h    retry after user intervention
SeeAlso: #01680,#01682,#01684

(Table 01684)
Values for DOS Error Locus:
 01h    unknown or not appropriate
 02h    block device (disk error)
 03h    network related
 04h    serial device (timeout)
 05h    memory related
SeeAlso: #01680,#01682,#01683
--------D-2159--BX0001-----------------------
INT 21 - European MS-DOS 4.0 - GET HARD ERROR INFORMATION
        AH = 59h
        BX = 0001h
Return: ES:DI -> hard error information packet (see #01685) for most recent
                hard (critical) error
SeeAlso: AH=59h/BX=0000h,AH=95h,INT 24

Format of European MS-DOS 4.0 hard error information packet:
Offset  Size    Description     (Table 01685)
 00h    WORD    contents of AX at system entry
 02h    WORD    Process ID which encountered error
 04h    WORD    contents of AX at time of error
 06h    BYTE    error type
                00h physical I/O error
                01h disk change request
                02h file sharing violation
                03h FCB problem
                04h file locking violation
                05h bad FAT
                06h network detected error
 07h    BYTE    INT 24 error code
 08h    WORD    extended error code (see #01680)
 0Ah    DWORD   pointer to associated device
--------D-215A-------------------------------
INT 21 - DOS 3.0+ - CREATE TEMPORARY FILE
        AH = 5Ah
        CX = file attribute (see #01420 at AX=4301h)
        DS:DX -> ASCIZ path ending with a '\' + 13 zero bytes to receive the
                generated filename
Return: CF clear if successful
            AX = file handle opened for read/write in compatibility mode
            DS:DX pathname extended with generated name for temporary file
        CF set on error
            AX = error code (03h,04h,05h) (see #01680)
Desc:   creates a file with a unique name which must be explicitly deleted
Notes:  under the FlashTek X-32 DOS extender, the path pointer is in DS:EDX
        MS-DOS 3.0-4.0 and DR DOS 3.4-5.0 generate the filename as a sequence
          of hex digits based on the current date and time; MS-DOS 6+,
          DR DOS 6, and Novell DOS 7 use letters A-P in place of hex digits
        MS-DOS 5.0 and DR DOS 3.41/5.0 will insert a missing trailing backslash
          before appending the generated filename, but due to this, an empty
          string results in a file in the root directory
BUGS:   COMPAQ DOS 3.31 hangs if the pathname is at XXXXh:0000h; it apparently
          wraps around to the end of the segment
        MS-DOS 5.00 revisions A and B and PC-DOS 5.00 revision A reportedly
          hang the system if the specified path is the root directory and the
          root directory is full (no free directory entries)
        Mark Incley <mincley@krisalis.demon.co.uk> reports that this function
          hangs in MS-DOS 6.2x if the name includes two consecutive path
          separators (e.g. C:\\ )
SeeAlso: AH=3Ch,AH=5Bh
--------D-215B-------------------------------
INT 21 - DOS 3.0+ - CREATE NEW FILE
        AH = 5Bh
        CX = file attribute (see #01420 at AX=4301h)
        DS:DX -> ASCIZ filename
Return: CF clear if successful
            AX = file handle opened for read/write in compatibility mode
        CF set on error
            AX = error code (03h,04h,05h,50h) (see #01680)
Notes:  unlike AH=3Ch, this function will fail if the specified file exists
          rather than truncating it; this permits its use in creating semaphore
          files because it is an atomic "test and set" operation
        under the FlashTek X-32 DOS extender, the filename pointer is in DS:EDX
SeeAlso: AH=3Ch,AH=5Ah
--------D-215C-------------------------------
INT 21 - DOS 3.0+ - "FLOCK" - RECORD LOCKING
        AH = 5Ch
        AL = subfunction
            00h lock region of file
            01h unlock region of file
        BX = file handle
        CX:DX = start offset of region within file
        SI:DI = length of region in bytes
Return: CF clear if successful
        CF set on error
            AX = error code (01h,06h,21h,24h) (see #01680)
Notes:  error returned unless SHARE or network installed
        an unlock call must specify the same region as some prior lock call
        locked regions become entirely inaccessible to other processes
        duplicate handles created with AH=45h or AH=46h inherit locks, but
          handles inherited by child processes (see AH=4Bh) do not
        under DR DOS 3.41 and 5.0, if a process opens a file without the no-
          inherit flag and then starts a child, any locks set by the parent
          are ignored, and the child will only get an error if it tries to
          lock an area previously locked by the parent process.  Under Novell
          DOS 7, this function is fully supported as in MS-DOS.
SeeAlso: AX=440Bh,AH=BCh,AH=BEh,INT 2F/AX=110Ah,INT 2F/AX=110Bh
--------D-215D00-----------------------------
INT 21 U - DOS 3.1+ internal - SERVER FUNCTION CALL
        AX = 5D00h
        DS:DX -> DOS parameter list (see #01686)
        DPL contains all register values for a call to INT 21h
Return: as appropriate for function being called
Notes:  does not check AH.  Out of range values will crash the system
        executes using specified computer ID and process ID
        sharing delay loops skipped
        a special sharing mode is enabled to handle FCBs opened across network
        wildcards are enabled for DELETE (AH=41h) and RENAME (AH=56h) under
          MS-DOS; under DR DOS 3.41, wildcards corrupt the filesystem; and
          under DR DOS 5.0-6.0, the call returns error code 03h due to improper
          support for the server function call (refer to BUGS: section below)
        an extra file attribute parameter is enabled for OPEN (AH=3Dh),
          DELETE (AH=41h), and RENAME (AH=56h)
        functions which take filenames require canonical names (as returned
          by AH=60h); this is apparently to prevent multi-hop file forwarding
BUGS:   the OS/2 2.0 DOS Boot Session incorrectly maps DOS drive letters,
          seemingly ignoring HPFS drives
        DR DOS 5.0-6.0 merely recursively call INT 21 after loading the
          registers from the DPL, leading to problems for peer-to-peer
          networks
SeeAlso: AH=3Dh,AH=41h,AH=56h,AH=60h

Format of DOS parameter list:
Offset  Size    Description     (Table 01686)
 00h    WORD    AX
 02h    WORD    BX
 04h    WORD    CX
 06h    WORD    DX
 08h    WORD    SI
 0Ah    WORD    DI
 0Ch    WORD    DS
 0Eh    WORD    ES
 10h    WORD    reserved (0)
 12h    WORD    computer ID (0 = current system)
 14h    WORD    process ID (PSP segment on specified computer)
Note:   under Windows Enhanced mode, the computer ID is normally the virtual
          machine ID (see INT 2F/AX=1683h), though this can reportedly be
          changed by setting UniqueDOSPSP= in SYSTEM.INI
--------D-215D01-----------------------------
INT 21 U - DOS 3.1+ internal - COMMIT ALL FILES FOR SPECIFIED COMPUTER/PROCESS
        AX = 5D01h
        DS:DX -> DOS parameter list (see #01686), only computer ID and
                  process ID fields used
Return: CF set on error
            AX = error code (see #01680)
        CF clear if successful
Notes:  flushes buffers and updates directory entries for each file which has
          been written to; if remote file, calls INT 2F/AX=1107h
        the computer ID and process ID are stored but ignored under DOS 3.3
        not supported by DR DOS 3.41 and 5.0; returns error code 01h.  Fully
          supported by Novell DOS 7
SeeAlso: AH=0Dh,AH=68h,INT 2F/AX=1107h
--------D-215D02-----------------------------
INT 21 U - DOS 3.1+ internal - SHARE.EXE - CLOSE FILE BY NAME
        AX = 5D02h
        DS:DX -> DOS parameter list (see #01686), only fields DX, DS,
                  computer ID, and process ID used
        DPL's DS:DX -> ASCIZ name of file to close
Return: CF set on error
            AX = error code (see #01680)
        CF clear if successful
Notes:  error unless SHARE is loaded (calls [SysFileTable-28h])
          (see #01636 at AH=52h)
        name must be canonical fully-qualified, such as returned by AH=60h
        not supported by DR DOS 3.41 and 5.0; returns error code 01h
        not supported by Novell DOS 7, although in Update 15 it is reported
          to no longer return an error code
SeeAlso: AX=5D03h,AX=5D04h,AH=3Eh,AH=60h
--------D-215D03-----------------------------
INT 21 U - DOS 3.1+ internal - SHARE.EXE - CLOSE ALL FILES FOR GIVEN COMPUTER
        AX = 5D03h
        DS:DX -> DOS parameter list (see #01686), only computer ID used
Return: CF set on error
            AX = error code (see #01680)
        CF clear if successful
Notes:  error unless SHARE is loaded (calls [SysFileTable-30h])
          (see #01636 at AH=52h)
        not supported by DR DOS 3.41 and 5.0; returns error code 01h
        not supported by Novell DOS 7 (at least through Update 4; may be
          supported in Update 15)
SeeAlso: AX=5D02h,AX=5D04h
--------D-215D04-----------------------------
INT 21 U - DOS 3.1+ internal - SHARE.EXE - CLOSE ALL FILES FOR GIVEN PROCESS
        AX = 5D04h
        DS:DX -> DOS parameter list (see #01686), only computer ID and
                  process ID fields used
Return: CF set on error
            AX = error code (see #01680)
        CF clear if successful
Notes:  error unless SHARE is loaded (calls [SysFileTable-2Ch])
           (see #01636 at AH=52h)
        not supported by DR DOS 3.41 and 5.0; returns error code 01h
        not supported by Novell DOS 7
SeeAlso: AX=5D02h,AX=5D03h,INT 2F/AX=111Dh
--------D-215D05-----------------------------
INT 21 U - DOS 3.1+ internal - SHARE.EXE - GET OPEN FILE LIST ENTRY
        AX = 5D05h
        DS:DX -> DOS parameter list (see #01686)
        DPL's BX = index of sharing record (see #01637 at AH=52h)
        DPL's CX = index of SFT in sharing record's SFT list
Return: CF clear if successful
            ES:DI -> ASCIZ filename
            BX = network machine number of SFT's owner
            CX = number of locks held by SFT's owner
        CF set if either index out of range
            AX = 0012h (no more files)
Notes:  error unless SHARE is loaded (calls [SysFileTable-18h])
          (see #01636 at AH=52h)
        names are always canonical fully-qualified, such as returned by AH=60h
        not supported by DR DOS 3.41 and 5.0 and Novell DOS 7, but does not
          return an error, instead destroying AX
SeeAlso: AH=5Ch,AH=60h
--------D-215D06-----------------------------
INT 21 U - DOS 3.0+ internal - GET ADDRESS OF DOS SWAPPABLE DATA AREA
        AX = 5D06h
Return: CF set on error
           AX = error code (see #01680)
        CF clear if successful
            DS:SI -> nonreentrant data area (includes all three DOS stacks)
                (critical error flag is first byte) (see #01687)
            CX = size in bytes of area which must be swapped while in DOS
            DX = size in bytes of area which must always be swapped
Notes:  the Critical Error flag is used in conjunction with the InDOS flag
          (see AH=34h) to determine when it is safe to enter DOS from a TSR
        setting CritErr flag allows use of functions 50h/51h from INT 28h under
          DOS 2.x by forcing use of correct stack
        swapping the data area allows reentering DOS unless DOS is in a
          critical section delimited by INT 2A/AH=80h and INT 2A/AH=81h,82h
        under DOS 4.0, AX=5D0Bh should be used instead of this function
        SHARE and other DOS utilities consult the byte at offset 04h in the
          DOS data segment (see INT 2F/AX=1203h) to determine the SDA format
          in use: 00h = DOS 3.x, 01h = DOS 4.0-6.0, other = error.
        DR DOS 3.41+ supports this function, but the SDA format beyond the
          first 18h bytes is completely different from MS-DOS
BUG:    calling this function with certain values in DX crashes Novell DOS 7.0
          prior to Update 14
SeeAlso: AX=5D0Bh,INT 2A/AH=80h,INT 2A/AH=81h,INT 2A/AH=82h

Format of DOS 3.10-3.30 Swappable Data Area:
Offset  Size    Description     (Table 01687)
 -34    BYTE    (DOS 3.10+) printer echo flag (00h off, FFh active)
 -31    BYTE    (DOS 3.30) current switch character
 -30    BYTE    current memory allocation strategy (see AH=58h)
 -28    BYTE    (DOS 3.30) incremented on each INT 21/AX=5E01h call
 -27 16 BYTEs   (DOS 3.30) machine name set by INT 21/AX=5E01h
 -11  5 WORDs   zero-terminated list of offsets which need to be patched to
                  enable critical-section calls (see INT 2A/AH=80h)
 -1     BYTE    unused padding
---start of actual SDA---
 00h    BYTE    critical error flag ("ErrorMode")
 01h    BYTE    InDOS flag (count of active INT 21 calls)
 02h    BYTE    drive on which current critical error occurred, or FFh
                (DR DOS sets to drive number during INT 24, 00h otherwise)
 03h    BYTE    locus of last error
 04h    WORD    extended error code of last error
 06h    BYTE    suggested action for last error
 07h    BYTE    class of last error
 08h    DWORD   ES:DI pointer for last error
 0Ch    DWORD   current DTA (Disk Transfer Address)
                note: may point into SDA during the DOS EXEC function
                  (see AH=4Bh), so programs which swap the SDA must be
                  prepared to move the DTA to a private buffer if they
                  might be invoked during an EXEC
 10h    WORD    current PSP
 12h    WORD    stores SP across an INT 23
 14h    WORD    return code from last process termination (zerod after reading
                  with AH=4Dh)
 16h    BYTE    current drive
 17h    BYTE    extended break flag
---remainder need only be swapped if in DOS---
 18h    WORD    value of AX on call to INT 21
 1Ah    WORD    PSP segment for sharing/network
 1Ch    WORD    network machine number for sharing/network (0000h = us)
 1Eh    WORD    first usable memory block found when allocating memory
 20h    WORD    best usable memory block found when allocating memory
 22h    WORD    last usable memory block found when allocating memory
 24h    WORD    memory size in paragraphs (used only during initialization)
 26h    WORD    last entry checked during directory search
 28h    BYTE    flag: INT 24 returned Fail
 29h    BYTE    flags: allowable INT 24 actions (passed to INT 24 in AH)
 2Ah    BYTE    directory flag (00h directory, 01h file)
 2Bh    BYTE    flag: FFh if Ctrl-Break termination, 00h otherwise
 2Ch    BYTE    flag: allow embedded blanks in FCB
 2Dh    BYTE    padding (unused)
 2Eh    BYTE    day of month
 2Fh    BYTE    month
 30h    WORD    year - 1980
 32h    WORD    number of days since 01jan1980
 34h    BYTE    day of week (0 = Sunday)
 35h    BYTE    flag: console swapped during read from device
 36h    BYTE    flag: safe to call INT 28 if nonzero
 37h    BYTE    flag: if nonzero, INT 24 Abort turned into INT 24 Fail
                (set only during process termination)
 38h 26 BYTEs   device driver request header (see #02597 at INT 2F/AX=0802h)
 52h    DWORD   pointer to device driver entry point (used in calling driver)
 56h 22 BYTEs   device driver request header for I/O calls
 6Ch 14 BYTEs   device driver request header for disk status check
 7Ah    DWORD   pointer to device I/O buffer???
 7Eh    WORD    ???
 80h    WORD    ???
 82h    BYTE    type of PSP copy (00h=simple for INT 21/AH=26h, FFh=make child)
 83h    BYTE    padding (unused)
 84h  3 BYTEs   24-bit user number (see AH=30h)
 87h    BYTE    OEM number (see #01394 at AH=30h)
 88h    WORD    offset to error code conversion table for INT 25/INT 26
 8Ah  6 BYTEs   CLOCK$ transfer record (see #01688)
 90h    BYTE    device I/O buffer for single-byte I/O functions
 91h    BYTE    padding??? (unused)
 92h 128 BYTEs  buffer for filename
112h 128 BYTEs  buffer for filename
192h 21 BYTEs   findfirst/findnext search data block (see #01626 at AH=4Eh)
1A7h 32 BYTEs   directory entry for found file (see #01352 at AH=11h)
1C7h 81 BYTEs   copy of current directory structure for drive being accessed
218h 11 BYTEs   FCB-format filename for device name comparison
223h    BYTE    terminating NUL for above filename
224h 11 BYTEs   wildcard destination specification for rename (FCB format)
22Fh    BYTE    terminating NUL for above spec
230h    BYTE    ???
231h    WORD    destination file/directory starting sector
233h  5 BYTEs   ???
238h    BYTE    extended FCB file attribute
239h    BYTE    type of FCB (00h regular, FFh extended)
23Ah    BYTE    directory search attributes
23Bh    BYTE    file open/access mode
23Ch    BYTE    file found/delete flag
                bit 0: file found
                bit 4: file deleted
23Dh    BYTE    flag: device name found on rename, or file not found
23Eh    BYTE    splice flag (file name and directory name together)
23Fh    BYTE    flag indicating how DOS function was invoked
                (00h = direct INT 20/INT 21, FFh = server call AX=5D00h)
240h    BYTE    sector position within cluster
241h    BYTE    flag: translate sector/cluster (00h no, 01h yes)
242h    BYTE    flag: 00h if read, 01h if write
243h    BYTE    current working drive number
244h    BYTE    cluster factor
245h    BYTE    flag: cluster split mode
246h    BYTE    line edit (AH=0Ah) insert mode flag (nonzero = on)
247h    BYTE    canonicalized filename referred to existing file/dir if FFh
248h    BYTE    volume ID flag
249h    BYTE    type of process termination (00h-03h) (see AH=4Dh)
24Ah    BYTE    file create flag (00h = no, search only)
24Bh    BYTE    value with which to replace first byte of deleted file's name
                  (normally E5h, but 00h as described under INT 21/AH=13h)
24Ch    DWORD   pointer to Drive Parameter Block for critical error invocation
                temp: used during process termination
250h    DWORD   pointer to stack frame containing user registers on INT 21
254h    WORD    stores SP across INT 24
256h    DWORD   pointer to DOS Drive Parameter Block for ???
25Ah    WORD    saving partial cluster number
25Ch    WORD    temp: sector of work current cluster
25Eh    WORD    high part of cluster number (only low byte referenced)
260h    WORD    ??? temp
262h    BYTE    Media ID byte returned by AH=1Bh,1Ch
263h    BYTE    padding (unused)
264h    DWORD   pointer to device header when filename is character device
268h    DWORD   pointer to current SFT
26Ch    DWORD   pointer to current directory structure for drive being accessed
270h    DWORD   pointer to caller's FCB
274h    WORD    number of SFT to which file being opened will refer
276h    WORD    temporary storage for file handle
278h    DWORD   pointer to a JFT entry in process handle table
                  (see #01378 at AH=26h)
27Ch    WORD    offset in DOS DS of first filename argument
27Eh    WORD    offset in DOS DS of second filename argument
280h    WORD    offset of last component in pathname or FFFFh
282h    WORD    offset of transfer address to add
284h    WORD    last relative cluster within file being accessed
286h    WORD    temp: absolute cluster number being accessed
288h    WORD    directory sector number
28Ah    WORD    ??? current cluster number
28Ch    WORD    current relative sector number within file
28Eh    WORD    current sector number
290h    WORD    current byte offset within sector
292h    DWORD   current offset in file
296h    DWORD   temp: file byte count
29Ah    WORD    temp: file byte count
29Ch    WORD    free file cluster entry
29Eh    WORD    last file cluster entry
2A0h    WORD    next file cluster number
2A2h    DWORD   number of bytes appended to file
2A6h    DWORD   pointer to current work disk buffer
2AAh    DWORD   pointer to working SFT
2AEh    WORD    used by INT 21 dispatcher to store caller's BX
2B0h    WORD    used by INT 21 dispatcher to store caller's DS
2B2h    WORD    temporary storage while saving/restoring caller's registers
2B4h    DWORD   pointer to prev call frame (offset 250h) if INT 21 reentered
                also switched to for duration of INT 24
2B8h 21 BYTEs   FindFirst search data for source file(s) of a rename operation
                (see #01626 at AH=4Eh)
2CDh 32 BYTEs   directory entry for file being renamed (see #01352 at AH=11h)
2EDh 331 BYTEs  critical error stack
   403h  35 BYTEs scratch SFT
438h 384 BYTEs  disk stack (functions greater than 0Ch, INT 25,INT 26)
5B8h 384 BYTEs  character I/O stack (functions 01h through 0Ch)
---DOS 3.2,3.3x only---
738h    BYTE    device driver lookahead flag (usually printer)
                (see AH=64h"DOS 3.2+")
739h    BYTE    volume change flag
73Ah    BYTE    flag: virtual open
73Bh    BYTE    ???
Note:   the only fields which remain valid BETWEEN calls to INT 21h are those
          in the initial "swap-always" portion of the SDA
SeeAlso: #01690

Format of CLOCK$ transfer record:
Offset  Size    Description     (Table 01688)
 00h    WORD    number of days since 1-Jan-1980
 02h    BYTE    minutes
 03h    BYTE    hours
 04h    BYTE    hundredths of second
 05h    BYTE    seconds
--------D-215D07-----------------------------
INT 21 U - DOS 3.1+ network - GET REDIRECTED PRINTER MODE
        AX = 5D07h
Return: DL = mode
            00h redirected output is combined
            01h redirected output in separate print jobs
Note:   MS-DOS and DR DOS 3.41/5.0 simply push AX on the stack and call
          INT 2F/AX=1125h
SeeAlso: AX=5D08h,AX=5D09h,INT 2F/AX=1125h
--------D-215D08-----------------------------
INT 21 U - DOS 3.1+ network - SET REDIRECTED PRINTER MODE
        AX = 5D08h
        DL = mode
            00h redirected output is combined
            01h redirected output placed in separate jobs, start new print job
                now
Return: nothing
Note:   MS-DOS and DR DOS 3.41/5.0 simply push AX on the stack and call
          INT 2F/AX=1125h
SeeAlso: AX=5D07h,AX=5D09h,INT 2F/AX=1125h
--------D-215D09-----------------------------
INT 21 U - DOS 3.1+ network - FLUSH REDIRECTED PRINTER OUTPUT
        AX = 5D09h
Return: nothing
Desc:   forces redirected printer output to be printed, and starts a new print
          job
Notes:  MS-DOS and DR DOS 3.41/5.0 simply push AX on the stack and call
          INT 2F/AX=1125h
        this function is also supported by 10Net, which calls it Terminate All
          Spool Jobs, and does not flush if in "combine" mode
SeeAlso: AX=5D07h,AX=5D08h,INT 2F/AX=1125h
--------D-215D0A-----------------------------
INT 21 - DOS 3.1+ - SET EXTENDED ERROR INFORMATION
        AX = 5D0Ah
        DS:DX -> 11-word DOS parameter list (see #01686)
Return: nothing.  next call to AH=59h will return values from fields AX,BX,CX,
          DX,DI, and ES in corresponding registers
Notes:  documented for DOS 5+, but undocumented in earlier versions
        the MS-DOS Programmer's Reference incorrectly states that this call was
          introduced in DOS 4, and fails to mention that the ERROR structure
          passed to this function is a DOS parameter list.
BUGS:   DR DOS 3.41 and 5.0 read the value for ES from the DS field of the
          DPL; fortunately, MS-DOS ignores the DS field, allowing a generic
          routine which sets both DS and ES fields to the same value
        Novell DOS 7 (through at least Update 4) does not save the pointer,
          which is always reported as 0000h:0000h by AH=59h; Update 15 fully
          supports this function
SeeAlso: AH=59h/BX=0000h
--------D-215D0B-----------------------------
INT 21 OU - DOS 4.x only - internal - GET DOS SWAPPABLE DATA AREAS
        AX = 5D0Bh
Return: CF set on error
            AX = error code (see #01680)
        CF clear if successful
            DS:SI -> swappable data area list (see #01689)
Notes:  copying and restoring the swappable data areas allows DOS to be
          reentered unless it is in a critical section delimited by calls to
          INT 2A/AH=80h and INT 2A/AH=81h,82h
        SHARE and other DOS utilities consult the byte at offset 04h in the
          DOS data segment (see INT 2F/AX=1203h) to determine the SDA format
          in use: 00h = DOS 3.x, 01h = DOS 4.0-6.0, other = error.
        DOS 5+ use the SDA format listed below, but revert back to the DOS 3.x
          call for finding the SDA (see #01687); Novell DOS 7 does not support
          this function, either.
SeeAlso: AX=5D06h,INT 2A/AH=80h,INT 2A/AH=81h,INT 2A/AH=82h,INT 2F/AX=1203h

Format of DOS 4.x swappable data area list:
Offset  Size    Description     (Table 01689)
 00h    WORD    count of data areas
 02h  N BYTEs   "count" copies of data area record
                Offset  Size    Description
                 00h    DWORD   address
                 04h    WORD    length and type
                                bit 15 set if swap always, clear if swap in DOS
                                bits 14-0: length in bytes
SeeAlso: #01690

Format of DOS 4.0-6.0 swappable data area:
Offset  Size    Description     (Table 01690)
 -34    BYTE    printer echo flag (00h off, FFh active)
 -31    BYTE    current switch character (ignored by DOS 5+)
 -30    BYTE    current memory allocation strategy (see AH=58h)
 -28    BYTE    incremented on each INT 21/AX=5E01h call
 -27 16 BYTEs   machine name set by INT 21/AX=5E01h
 -11  5 WORDs   zero-terminated list of offsets which need to be patched to
                  enable critical-section calls (see INT 2A/AH=80h)
                (all offsets are 0D0Ch, but this list is still present for
                  DOS 3.x compatibility)
 -1     BYTE    unused padding
Note:   the above data is not actually part of the SDA, and is much more likely
          to change between DOS versions/OEMs than data in the SDA itself
---start of actual SDA---
 00h    BYTE    critical error flag ("ErrorMode")
 01h    BYTE    InDOS flag (count of active INT 21 calls)
 02h    BYTE    drive on which current critical error occurred or FFh
                (DR DOS 3.41/5.0 set this to 00h when no critical error)
 03h    BYTE    locus of last error
 04h    WORD    extended error code of last error
 06h    BYTE    suggested action for last error
 07h    BYTE    class of last error
 08h    DWORD   ES:DI pointer for last error
 0Ch    DWORD   current DTA (Disk Transfer Address)
                note: may point into SDA during the DOS EXEC function
                  (see AH=4Bh), so programs which swap the SDA must be
                  prepared to move the DTA to a private buffer if they
                  might be invoked during an EXEC
 10h    WORD    current PSP
 12h    WORD    stores SP across an INT 23
 14h    WORD    return code from last process termination (zerod after reading
                  with AH=4Dh)
 16h    BYTE    current drive
 17h    BYTE    extended break flag
 18h    BYTE    flag: code page switching
 19h    BYTE    flag: copy of previous byte in case of INT 24 Abort
---remainder need only be swapped if in DOS---
 1Ah    WORD    value of AX on call to INT 21
                Note:   does not contain correct value on functions 00h-0Ch,
                          50h, 51h, 59h, or 62h                 
 1Ch    WORD    PSP segment for sharing/network (0000h = local)
 1Eh    WORD    network machine number for sharing/network (0000h = local)
 20h    WORD    first usable memory block found when allocating memory
 22h    WORD    best usable memory block found when allocating memory
 24h    WORD    last usable memory block found when allocating memory
 26h    WORD    memory size in paragraphs (used only during initialization)
 28h    WORD    last entry checked during directory search
 2Ah    BYTE    flag: nonzero if INT 24 Fail
 2Bh    BYTE    flags: allowable INT 24 responses (passed to INT 24 in AH)
 2Ch    BYTE    flag: do not set directory if nonzero
 2Dh    BYTE    flag: program aborted by ^C
 2Eh    BYTE    flag: allow embedded blanks in FCB
                may also allow use of "*" wildcard in FCBs
 2Fh    BYTE    padding (unused)
 30h    BYTE    day of month
 31h    BYTE    month
 32h    WORD    year - 1980
 34h    WORD    number of days since 01jan1980
 36h    BYTE    day of week (0 = Sunday)
 37h    BYTE    flag: console swapped during read from device
 38h    BYTE    flag: safe to call INT 28 if nonzero
 39h    BYTE    flag: abort currently in progress, turn INT 24 Abort into Fail
 3Ah 30 BYTEs   device driver request header (see #02597 at INT 2F/AX=0802h) for
                  device calls
 58h    DWORD   pointer to device driver entry point (used in calling driver)
 5Ch 22 BYTEs   device driver request header for I/O calls
 72h 14 BYTEs   device driver request header for disk status check (also
                  includes following eight bytes for some calls)
 80h    DWORD   pointer to device I/O buffer
 84h    WORD    part of request header at 72h
 86h    WORD    part of request header at 72h (0)
 88h    BYTE    type of PSP copy (00h=simple for INT 21/AH=26h, FFh=make child)
 89h    DWORD   start offset of file region to lock/unlock
 8Dh    DWORD   length of file region to lock/unlock
 91h    BYTE    padding (unused)
 92h  3 BYTEs   24-bit user number (see AH=30h)
 95h    BYTE    OEM number (see #01394 at AH=30h)
 96h  6 BYTEs   CLOCK$ transfer record (see #01688 at AX=5D06h)
 9Ch    BYTE    device I/O buffer for single-byte I/O functions
 9Dh    BYTE    padding
 9Eh 128 BYTEs  buffer for filename
11Eh 128 BYTEs  buffer for filename (rename destination name)
19Eh 21 BYTEs   findfirst/findnext search data block (see #01626 at AH=4Eh)
1B3h 32 BYTEs   directory entry for found file (see #01394 at AH=11h)
1D3h 88 BYTEs   copy of current directory structure for drive being accessed
22Bh 11 BYTEs   FCB-format filename for device name comparison
236h    BYTE    terminating NUL for above filename
237h 11 BYTEs   wildcard destination specification for rename (FCB format)
242h    BYTE    terminating NUL for above filespec
243h    BYTE    padding???
244h    WORD    destination starting sector (cluster???)
246h  5 BYTEs   extra space to allow a directory entry to be stored starting
                  at offset 22Bh
24Bh    BYTE    extended FCB file attributes
24Ch    BYTE    type of FCB (00h regular, FFh extended)
24Dh    BYTE    directory search attributes
24Eh    BYTE    file open/access mode
24Fh    BYTE    flag: nonzero if file was deleted
250h    BYTE    flag: device name found on rename, or file not found
251h    BYTE    flag: splice file name and directory name together
252h    BYTE    flag indicating how DOS function was invoked
                (00h = direct INT 20/INT 21, FFh = server call AX=5D00h)
253h    BYTE    sector position within cluster
254h    BYTE    flag: translating sector/cluster
255h    BYTE    flag: 00h if read, 01h if write
256h    BYTE    current working drive number
257h    BYTE    cluster factor
258h    BYTE    "sda_CLUSSPLIT" flag: cluster split between two FAT sectors
259h    BYTE    line edit (AH=0Ah) insert mode flag (nonzero = on)
25Ah    BYTE    canonicalized filename referred to existing file/dir if FFh
25Bh    BYTE    volume ID flag
25Ch    BYTE    type of process termination (00h-03h) (see AH=4Dh)
25Dh    BYTE    unused (padding for alignment)
25Eh    BYTE    file create flag (00h = no, search only)
25Fh    BYTE    value for deleted file's first byte: 00h to delete all, else E5
260h    DWORD   pointer to Drive Parameter Block for critical error invocation
264h    DWORD   pointer to stack frame containing user registers on INT 21
268h    WORD    stores SP across INT 24
26Ah    DWORD   pointer to DOS Drive Parameter Block for ???
26Eh    WORD    segment of disk buffer
270h    DWORD   saving partial cluster number
274h    WORD    "sda_PREREAD" 00h if preread, 01h if optional
276h    WORD    temporary used in allocating disk space
278h    BYTE    Media ID byte returned by AH=1Bh,1Ch
279h    BYTE    unused
27Ah    DWORD   pointer to device header if filename is character device
27Eh    DWORD   pointer to current SFT
282h    DWORD   pointer to current directory structure for drive being accessed
286h    DWORD   pointer to caller's FCB
28Ah    WORD    SFT index to which file being opened will refer
28Ch    WORD    temporary storage for file handle
28Eh    DWORD   pointer to JFT entry (for file being opened) in process handle
                  table (see #01378 at AH=26h)
292h    WORD    "sda_WFP_START" offset in DOS DS of first filename argument
294h    WORD    "sda_REN_WFP" offset in DOS DS of second filename argument
296h    WORD    offset of last component in pathname or FFFFh
298h    WORD    offset of transfer address to add
29Ah    WORD    last relative cluster within file being accessed
29Ch    WORD    temp: absolute cluster number being accessed
29Eh    DWORD   directory sector number
2A2h    WORD    directory cluster number
2A4h    DWORD   current relative sector number within file
2A8h    DWORD   current sector number (number of previously written sectors)
2ACh    WORD    current byte offset within sector
2AEh    DWORD   current offset in file
2B2h    WORD    number of bytes in first sector
2B4h    WORD    bytes in partial last sector
2B6h    WORD    number of whole sectors
2B8h    WORD    free file cluster entry
2BAh    WORD    last file cluster entry
2BCh    WORD    next file cluster number
2BEh    DWORD   number of bytes appended to file
2C2h    DWORD   pointer to current work disk buffer
2C6h    DWORD   pointer to working SFT
2CAh    WORD    used by INT 21 dispatcher to store caller's BX
2CCh    WORD    used by INT 21 dispatcher to store caller's DS
2CEh    WORD    temporary storage while saving/restoring caller's registers
2D0h    DWORD   pointer to prev call frame (offset 264h) if INT 21 reentered
                also switched to for duration of INT 24
2D4h    WORD    open mode/action for INT 21/AX=6C00h
2D6h    BYTE    extended open conditional flag
                set to 00h by INT 21h dispatcher, 02h when a read is
                  performed, and 01h or 03h by INT 21/AX=6C00h
2D7h    WORD    extended open I/O mode
2D9h    DWORD   stored ES:DI for AX=6C00h
2DDh    WORD    extended file open action code (see #01770 at AX=6C00h)
2DFh    WORD    extended file open attributes (see #01769 at AX=6C00h)
2E1h    WORD    extended file open file mode (see AX=6C00h)
2E3h    DWORD   pointer to filename to open (see AX=6C00h)
2E7h    WORD    high word of 32-bit sector number, or temp data buffer size
                   from disk buffer
2E9h    WORD    "sda_OffsetMagicPatch"
2EBh    BYTE    disk full on >32M partition when set to 01h
2ECh    WORD    stores DS during call to [List-of-Lists + 37h]
2EEh    WORD    temporary storage (various uses)
2F0h    BYTE    storage for drive error
2F1h    WORD    DOS 3.4 (European MS-DOS 4.00) bit flags
2F3h    DWORD   pointer to user-supplied filename
2F7h    DWORD   pointer to user-supplied rename destination filename
2FBh    WORD    stores SS during call to [List-of-Lists + 37h] and INT 25,26 
2FDh    WORD    stores SP during call to [List-of-Lists + 37h] and INT 25,26
2FFh    BYTE    flag, nonzero if stack switched in calling [List-of-Lists+37h]
300h 21 BYTEs   FindFirst search data for source file(s) of a rename operation
                (see #01626 at AH=4Eh)
315h 32 BYTEs   directory entry for file being renamed (see #01352 at AH=11h)
335h 331 BYTEs  critical error stack
480h 384 BYTEs  disk stack (functions greater than 0Ch, INT 25,INT 26)
600h 384 BYTEs  character I/O stack (functions 01h through 0Ch)
780h    BYTE    device driver lookahead flag (usually printer)
                (see AH=64h"DOS 3.2+")
781h    BYTE    volume change flag
782h    BYTE    flag: virtual file open
783h    BYTE    fastseek drive
784h    WORD    fastseek first cluster number
786h    WORD    fastseek logical cluster number
788h    WORD    fastseek returned logical cluster number
78Ah    WORD    temporary location of DOS@SYSINIT
---MSDOS 7.1+ (FAT32)---
78Ch 47 BYTEs   ???
7BBh    BYTE    flag: absolute disk read/write type
                00h = INT 25/INT 26
                01h = INT 21/AX=7305h
7BCh    WORD    high word of directory cluster number at offset 2A2h
7BEh    WORD    high word of cluster number at offset 29Ch
7C0h    WORD    high word of next file cluster number at offset 2BCh
7C2h    WORD    high word of last relative cluster number at offset 29Ah
7C4h    WORD    high word of temp at offset 276h
7C6h    WORD    high word of offset 244h
7C8h    WORD    high word of EBX
7CAh    WORD    high word of EDX used by "PACK"
7CCh    WORD    high word of EDI used by "UNPACK"
7CEh    WORD    high word of EBX used by "SETDIRSRCH"
7D0h    WORD    high word of ECX used by "FREECLUSTER"
7D2h    WORD    high word of EDI used by "GETEOF"
7D4h  3 WORDs   ???
Note:   the only fields which remain valid BETWEEN calls to INT 21h are those
          in the initial "swap-always" portion of the SDA
SeeAlso: #01687,#01689
--------D-215E00-----------------------------
INT 21 - DOS 3.1+ network - GET MACHINE NAME
        AX = 5E00h
        DS:DX -> 16-byte buffer for ASCII machine name
Return: CF clear if successful
            CH = validity
                00h name invalid
                nonzero valid
                    CL = NetBIOS number for machine name
                    DS:DX buffer filled with blank-paded name
        CF set on error
            AX = error code (01h) (see #01680 at AH=59h)
Note:   supported by OS/2 v1.3+ compatibility box, PC-NFS
SeeAlso: AX=5E01h
--------N-215E00-----------------------------
INT 21 - 10NET v5.0 - GET MACHINE NAME
        AX = 5E00h
Return: CL = redirector's NetBIOS name number
        ES:DI -> network node ID
SeeAlso: AX=5E01h"10NET"
--------D-215E01CH00-------------------------
INT 21 - DOS 3.1+ network - SET MACHINE NAME
        AX = 5E01h
        CH = 00h undefine name (make it invalid)
           <> 0  define name
        CL = name number
        DS:DX -> 15-character blank-padded ASCIZ name
SeeAlso: AX=5E00h
--------N-215E01-----------------------------
INT 21 - 10NET v5.0 - GET LOCAL 10NET CONFIGURATION TABLE
        AX = 5E01h
        CX = length of buffer
        DS:DX -> buffer for 10Net configuration table (see #01691)
Return: DS:DX buffer filled
SeeAlso: AX=5E00h"10NET",INT 6F/AH=02h,INT 6F/AH=03h

Format of 10Net Configuration Table:
Offset  Size    Description     (Table 01691)
 00h  8 BYTEs   user name
 08h 15 BYTEs   node ID
 17h  3 BYTEs   unique portion of Ethernet address
 1Ah    BYTE    Who group number
 1Bh    WORD    services mask (see #01693)
 1Dh    DWORD   serial number
 21h    BYTE    maximum concurrent users with same serial number allowed on net
 22h    BYTE    chat mask (see #01694)
 23h    BYTE    internal system bits (see #01695)
 24h  9 BYTEs   version number in format MM.mm.xxx
 2Dh    BYTE    flag: 01h if machine is a PS/2
 2Eh    BYTE    flag: 03h if 80386
 2Fh    BYTE    spool termination mode: 01h concatenate, 02h truncate
                (see AX=5D09h)
 30h    WORD    autospool timeout in clock ticks
 32h    WORD    monitor timeout in clock ticks
 34h    WORD    unused
 36h    WORD    chat timeout in clock ticks
 38h    WORD    netBIOS session timeout in half-seconds
 3Ah    WORD    datagram send timeout in seconds
 3Ch    WORD    keyboard value for initiating chat mode
 3Eh    WORD    Who timeout in clock ticks
 40h    BYTE    flag: 01h if server should process rom NetBIOS Post return
 41h    BYTE    flag: 01h if FCBs should be recycled
 42h  3 BYTEs   signature "DBG"
 45h    BYTE    last interrupt (21h or 6Fh)
 46h    BYTE    last INT 21 AH value
 47h    BYTE    last INT 6F AH value
 48h    WORD    last item posted
 4Ah    WORD    last item free-posted
 4Ch    WORD    last item handled by server
 4Eh    WORD    last redirector send NCB
 50h    WORD    last redirector receive NCB
 52h  4 BYTEs   signature "TABL"
 56h    WORD    offset of datagram buffer table header (see #01692)
 58h    WORD    offset of chat buffer table header (see #01692)
 5Ah    WORD    offset of Raw buffer table header (see #01692)
 5Ch    WORD    offset of Workstation buffer table header (see #01692)
 5Eh    WORD    offset of server receive-any table header (see #01692)
 60h    WORD    offset of Tiny buffer table header (see #01692)
 62h    WORD    offset of zero-length buffer table (NCBs) (see #01692)
 64h    WORD    offset of Rdr (Redirector Mount) table header (see #01692)
 66h    WORD    offset of Ntab (Redirector Session) table header (see #01692)
 68h    WORD    offset of FCB table header (see #01692)
 6Ah    WORD    offset of user file handle table header (see #01692)
 6Ch    WORD    offset of workstation printer RDR extension table header
 6Eh    WORD    offset of server shared device table header (see #01692)
 70h    WORD    offset of server connection table header (see #01692)
 72h    WORD    offset of server login table header (see #01692)
 74h    WORD    offset of server file table header (see #01692)
 76h    WORD    offset of server shared file table header (see #01692)
 78h    WORD    offset of server record lock table header (see #01692)
 7Ah    WORD    offset of remote printer claim table header (see #01692)
 7Ch    WORD    offset of remote printer device table header (see #01692)
 7Eh    WORD    offset of print server mount table header (see #01692)
 80h    WORD    offset of print server sessions table header (see #01692)
 82h    WORD    offset of print server print job structure table header
 84h    WORD    offset of print server pooled device table header (see #01692)
 86h    WORD    size of workstation buffer
 88h    WORD    size of server receive-any buffer
 8Ah    WORD    size of server raw I/O buffer
 8Ch  6 BYTEs   reserved
 92h    DWORD   pointer to profile pathname
 96h    BYTE    datagram retry count
 97h    BYTE    NetBIOS LAN adapter number
 98h  6 BYTEs   physical Ethernet address
 9Eh    BYTE    NetBIOS server name number
 9Fh    BYTE    NetBIOS redirector name number
 A0h    BYTE    10Net interrupt number
 A1h    BYTE    flag: chat is loaded
 A2h    BYTE    flag: INT 6F APIs permanently loaded
 A3h    BYTE    flag: file security present
 A4h    WORD    reserved
 A6h    BYTE    fixed mount bitmask for drives A:-H:
 A7h    BYTE    reserved
 A8h    WORD    10Net system flags (see #01696)
 AAh    BYTE    monitor flags (see #01697)
 ABh  5 BYTEs   reserved
 B0h    WORD    offset of monitor timer block
 B2h    WORD    offset of server timer block
 B4h    WORD    offset of chat timer block
 B6h    WORD    timer chain
 B8h  4 BYTEs   signature "TALS"
 BCh    WORD    number of 10Net sends
 BEh    WORD    number of 10Net receives
 C0h    WORD    number of no-buffer conditions
 C2h    WORD    number of dropped posted messages
 C4h    WORD    number of server NCB errors
 C6h    WORD    number of redirector NCB errors
 C8h    WORD    number of datagram send/receive errors
 CAh    WORD    number of dropped Whos
 CCh    WORD    number of dropped submits
 CEh    WORD    number of session aborts
 D0h    BYTE    number of NetBIOS interface-busy errors
 D1h    BYTE    last NetBIOS bad post command
 D2h    BYTE    last NetBIOS bad redirector command
 D3h    BYTE    do send datagram send/receive error command
 D4h    DWORD   -> DOS system parameter table
 D8h    WORD    number of DOS physical drives
 DAh    WORD    offset of DOS PSP field in DOS data segment
 DCh    WORD    offset of in-DOS flag in DOS data segment
 DEh    WORD    DOS data segment
 E0h    WORD    offset of DOS SFT in DOS data segment
 E2h    WORD    offset of number-of-physical-units field in DOS data segment
 E4h    WORD    10Net code segment
 E6h    WORD    10Net data segment
 E8h    WORD    10Net common server segment
 EAh    WORD    10Net file server segment
 ECh    WORD    10Net print server segment
 EEh    WORD    10Net remote printer segment
Note:   documentation lists field at offset D0h as a WORD, but all following
          offsets are as though it were a BYTE; if it is indeed a WORD, all
          offsets after D0h must be increased by one byte

Format of 10Net Table Header:
Offset  Size    Description     (Table 01692)
 -16  4 BYTEs   table identifier
 -12    WORD    peak number of tables allocated
 -10    WORD    number of tables currently in use
 -8     WORD    total number of tables
 -6     WORD    size of each table
 -4     WORD    offset of first allocated table
 -2     WORD    offset of first free table

Bitfields for 10NET services mask:
Bit(s)  Description     (Table 01693)
 0      workstation
 1      file server
 2      print queue server
 3      de-spool server

Bitfields for 10NET chat mask:
Bit(s)  Description     (Table 01694)
 0      chat permitted
 1      bell enabled
 2      chat keyboard initiated
 3      in INT 16 handler
 4      in Get Input
 5      display has timed out
 6      chat is idle

Bitfields for 10NET internal system bits:
Bit(s)  Description     (Table 01695)
 0      submit permitted
 1      submit initiated
 2      submit executing
 3      internal client call/chat/spool/autospool
 4      in spool termination
 5      print permitted
 6      waiting for keyboard input

Bitfields for 10NET System Flags:
Bit(s)  Description     (Table 01696)
 0      in NetBIOS
 1      processing INT 28
 2      is server
 3      in net user-DOS function
 4      in DOS user-DOS function
 5      in net for user non-DOS function
 6      in server DOS function
 7      in server non-DOS function
 8      in terminate
 10     in user on server request
 13     in DOS for user on server
 14     disable critical error handler

Bitfields for Monitor Flags:
Bit(s)  Description     (Table 01697)
 0      waiting for monitor response
 4      in monitor get-input routine
 5      monitor display timeout
 6      sensing for escape key
--------D-215E02-----------------------------
INT 21 - DOS 3.1+ network - SET NETWORK PRINTER SETUP STRING
        AX = 5E02h
        BX = redirection list index (see AX=5F02h)
        CX = length of setup string
        DS:SI -> setup string
Return: CF clear if successful
        CF set on error
            AX = error code (01h) (see #01680 at AH=59h/BX=0000h)
Note:   also supported by 10NET v5.0
SeeAlso: AX=5E03h,INT 2F/AX=111Fh
--------D-215E03-----------------------------
INT 21 - DOS 3.1+ network - GET NETWORK PRINTER SETUP STRING
        AX = 5E03h
        BX = redirection list index (see AX=5F02h)
        ES:DI -> 64-byte buffer for setup string
Return: CF clear if successful
            CX = length of setup string
            ES:DI buffer filled
        CF set on error
            AX = error code (01h) (see #01680 at AH=59h/BX=0000h)
Note:   also supported by 10NET v5.0, but 10NET is documented as using DS:SI
          instead of ES:DI
SeeAlso: AX=5E02h,INT 2F/AX=111Fh
--------D-215E04-----------------------------
INT 21 - DOS 3.1+ network - SET PRINTER MODE
        AX = 5E04h
        BX = redirection list index (see AX=5F02h)
        DX = mode
            bit 0: set if binary, clear if text (tabs expanded to blanks)
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
Notes:  calls INT 2F/AX=111Fh with 5E04h on stack
        supported by DR DOS 3.41+
SeeAlso: AX=5E05h"DOS",INT 2F/AX=111Fh
--------N-215E04-----------------------------
INT 21 - 10NET v5.0 - INITIATE PRINT JOB
        AX = 5E04h
        BX = zero-based redirection list index (see AX=5F02h)
        DS:DX -> extended workstation printer setup structure (see #01698)
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
SeeAlso: AX=5E05h"10NET",AX=5E06h"10NET"

Format of 10NET extended workstation printer setup structure:
Offset  Size    Description     (Table 01698)
 00h    BYTE    notification flags (see #01699)
 01h    BYTE    job control mask (see #01700)
 02h    WORD    days to retain file
 04h    WORD    test print length
 06h    BYTE    number of copies to print
 07h    BYTE    compression algorithm
 08h    BYTE    tab width (00h = don't expand)
 09h    BYTE    initiation type (00h normal, 01h non-spooled)
 0Ah 38 BYTEs   job start operation notification instructions
 30h 32 BYTEs   comment for job
 50h 64 BYTEs   output filename or non-spooled file

Bitfields for 10NET notification flags:
Bit(s)  Description     (Table 01699)
 0      user at print start
 1      operator at start, with reply
 2      user at print completion
 3      operator at completion, with reply
 4      user on queue switch
 5      operator on queue switch, with reply
 6      user on print error

Bitfields for 10NET job control mask:
Bit(s)  Description     (Table 01700)
 0      print banner page
 1      eject page at end of job
 2      mark as "held" (queue but don't print)
 3      rush job (queue at top)
 4      overwrite file with zeros before deletion
 5      hyperspool if possible
--------D-215E05-----------------------------
INT 21 - DOS 3.1+ network - GET PRINTER MODE
        AX = 5E05h
        BX = redirection list index (see AX=5F02h)
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            DX = printer mode (see AX=5E04h)
Notes:  calls INT 2F/AX=111Fh with 5E05h on stack
        supported by DR DOS 3.41+
SeeAlso: AX=5E04h"DOS",INT 2F/AX=111Fh
--------N-215E05-----------------------------
INT 21 - 10NET v5.0 - TERMINATE PRINT JOB
        AX = 5E05h
        BX = zero-based redirection list index (see AX=5F02h)
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
Note:   this call resets the spool termination mode to "truncate"
          (see AX=5D08h)
SeeAlso: AX=5E04h"10NET",AX=5E06h
--------N-215E06-----------------------------
INT 21 - 10NET v5.0 - GET/SET 10NET WORKSTATION PRINTER SETUP STRUCTURE
        AX = 5E06h
        BX = zero-based redirection list index (see AX=5F02h)
        CX = operation (06h set, 07h get)
        DS:DX -> buffer for setup structure (same as first nine bytes of
                  workstation printer setup) (see #01698)
Return: CF clear if successful
            DS:DX buffer updated on get
        CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
SeeAlso: AX=5E04h"10NET",AX=5E05h"10NET"
--------!---Section--------------------------
Interrupt List, part 8 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------D-215F00-----------------------------
INT 21 - DOS 3.1+ network - GET REDIRECTION MODE
        AX = 5F00h
        BL = redirection type
            03h printer
            04h disk drive
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            BH = redirection state
                00h off
                01h on
Note:   calls INT 2F/AX=111Eh with AX on top of the stack
SeeAlso: AX=5F01h,INT 2F/AX=111Eh
--------D-215F01-----------------------------
INT 21 - DOS 3.1+ network - SET REDIRECTION MODE
        AX = 5F01h
        BL = redirection type
            03h printer
            04h disk drive
        BH = redirection state
            00h off
            01h on
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
Notes:  when redirection is off, the local device (if any) rather than the
          remote device is used
        calls INT 2F/AX=111Eh with AX on top of the stack
SeeAlso: AX=5F00h,INT 2F/AX=111Eh,INT 60/AX=0002h
--------D-215F02-----------------------------
INT 21 - DOS 3.1+ network - GET REDIRECTION LIST ENTRY
        AX = 5F02h
        BX = zero-based redirection list index
        CX = driver signature
            0000h LANtastic
            4E57h ('NW') NetWare
        DS:SI -> 16-byte buffer for ASCIZ local device name or drive letter
                  followed by colon
        ES:DI -> 128-byte buffer for ASCIZ network name
Return: CF clear if successful
            BH = device status
                00h valid
                01h invalid
                02h valid (connected from inside Windows for Workgroups v3.11)
            BL = device type
                03h printer
                04h disk drive
            CX = user data previously set with AX=5F03h
            DS:SI and ES:DI buffers filled
            DX,BP destroyed
        CF set on error
            AX = error code (01h,12h) (see #01680 at AH=59h/BX=0000h)
Notes:  this function is passed through to INT 2F/AX=111Eh by the DOS kernel
        error code 12h is returned if BX is greater than the size of the list
        also supported by Banyan VINES, PC-NFS, LANtastic, and 10NET
        supported by LapLink RemoteAccess but returns the local drive letter;
          the remote drive letter can be obtained with INT 2F/AX=Cxxxh
          (see INT 2F/AX=C000h"LapLink")
        the returned device name may or may not include a colon, depending on
          the network software
SeeAlso: AX=5F03h,AX=5F46h,INT 2F/AX=111Eh,INT 2F/AX=C000h"LapLink"
--------D-215F03-----------------------------
INT 21 - DOS 3.1+ network - REDIRECT DEVICE
        AX = 5F03h
        BL = device type
            03h printer
            04h disk drive
        CX = user data to save
                0000h for LANtastic
                4E57h ("NW") for NetWare 4.0 requester
        DS:SI -> ASCIZ local device name (16 bytes max)
        ES:DI -> ASCIZ network name + ASCIZ password (128 bytes max total)
Return: CF clear if successful
        CF set on error
            AX = error code (01h,03h,05h,08h,0Fh,12h) (see #01680 at AH=59h)
Notes:  if device type is disk drive, DS:SI must point at either a null string
          or a string consisting the drive letter followed by a colon; if a
          null string, the network attempts to access the destination without
          redirecting a local drive
        the DOS kernel calls INT 2F/AX=111Eh with AX on top of the stack
        also supported by Banyan VINES, LANtastic, and 10NET
SeeAlso: AX=5F02h,AX=5F04h,INT 2F/AX=111Eh,INT 60/AX=0002h
--------D-215F04-----------------------------
INT 21 - DOS 3.1+ network - CANCEL REDIRECTION
        AX = 5F04h
        DS:SI -> ASCIZ local device name or path
        CX = 4E57h ("NW") for NetWare 4.0 requester
Return: CF clear if successful
        CF set on error
            AX = error code (01h,03h,05h,08h,0Fh,12h) (see #01680 at AH=59h)
Notes:  the DS:SI string must be either a local device name, a drive letter
          followed by a colon, or a network directory beginning with two
          backslashes
        the DOS kernel calls INT 2F/AX=111Eh with AX on top of the stack
        also supported by Banyan VINES, LANtastic, and 10NET
        for NetWare, if only a server name is specified (i.e. "\\SERVER"),
          the connection to that server will be closed
SeeAlso: AX=5F03h,INT 2F/AX=111Eh,INT 60/AX=0003h
--------D-215F05-----------------------------
INT 21 - DOS 4.0+ network - GET EXTENDED REDIRECTION LIST ENTRY
        AX = 5F05h
        BX = redirection list index
        DS:SI -> buffer for ASCIZ source device name
        ES:DI -> buffer for destination ASCIZ network path
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            AX = server's network process ID handle (10NET)
            BH = device status flag (bit 0 clear if valid)
            BL = device type (03h if printer, 04h if drive)
            CX = stored parameter value (user data) from AX=5F03h
            BP = NETBIOS local session number
            DS:SI buffer filled
            ES:DI buffer filled
Notes:  the local session number allows sharing the redirector's session number
        if an error is caused on the NETBIOS LSN, the redirector may be unable
          to correctly recover from errors
        the DOS kernel calls INT 2F/AX=111Eh with AX on top of the stack
        supported by DR DOS 5.0
        also supported by 10NET v5.0
SeeAlso: AX=5F06h"Network",INT 2F/AX=111Eh
--------O-215F05-----------------------------
INT 21 - STARLITE architecture - MAP LOCAL DRIVE LETTER TO REMOTE FILE SYSTEM
        AX = 5F05h
        DL = drive number (0=A:)
        DS:SI -> ASCIZ name of the object to map the drive to
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
SeeAlso: AX=5F06h"STARLITE",INT 60/AX=0002h
--------N-215F06-----------------------------
INT 21 U - Network - GET FULL REDIRECTION LIST
        AX = 5F06h
        ???
Return: ???
Notes:  similar to AX=5F02h and AX=5F05h, but also returns redirections
          excluded from those calls for various reasons
        calls INT 2F/AX=111Eh with AX on top of the stack
SeeAlso: AX=5F05h"DOS",INT 2F/AX=111Eh
--------O-215F06-----------------------------
INT 21 - STARLITE architecture - UNMAP DRIVE LETTER
        AX = 5F06h
        DL = drive to be unmapped (0=A:)
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
SeeAlso: AX=5F05h"STARLITE",INT 60/AX=0003h
--------D-215F07-----------------------------
INT 21 - DOS 5+ - ENABLE DRIVE
        AX = 5F07h
        DL = drive number (0=A:)
Return: CF clear if successful
        CF set on error
            AX = error code (0Fh) (see #01680 at AH=59h/BX=0000h)
Notes:  simply sets the "valid" bit in the drive's CDS
        this function is not supported by Novell DOS 7 through at least
          Update 4, but support was added by Update 13
SeeAlso: AH=52h,AX=5F08h"DOS"
--------O-215F07-----------------------------
INT 21 - STARLITE architecture - MAKE NAMED OBJECT AVAILABLE ON NETWORK
        AX = 5F07h
        DS:SI -> ASCIZ name of object to offer to network
        ES:DI -> ASCIZ name under which object will be known on the network
                MUST begin with three slashes
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
SeeAlso: AX=5F08h"STARLITE"
--------D-215F08-----------------------------
INT 21 - DOS 5+ - DISABLE DRIVE
        AX = 5F08h
        DL = drive number (0=A:)
Return: CF clear if successful
        CF set on error
            AX = error code (0Fh) (see #01680 at AH=59h/BX=0000h)
Notes:  simply clears the "valid" bit in the drive's CDS
        this function is not supported by Novell DOS 7 through at least
          Update 4, but support was added by Update 13
SeeAlso: AH=52h,AX=5F07h"DOS"
--------O-215F08-----------------------------
INT 21 - STARLITE architecture - REMOVE GLOBAL NETWORK NAME OF OBJECT
        AX = 5F08h
        DS:SI -> ASCIZ network name (not local name) of object to unshare
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
SeeAlso: AX=5F07h"STARLITE"
--------O-215F09-----------------------------
INT 21 - STARLITE architecture - BIND TO NETWORK DEVICE
        AX = 5F09h
        DS:DX -> ASCIZ name of the device driver to attach to
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
Note:   the STARLITE distributed file system can attach to multiple networks
          simultaneously
SeeAlso: AX=5F0Ah
--------O-215F0A-----------------------------
INT 21 - STARLITE architecture - DETACH FROM NETWORK DEVICE
        AX = 5F0Ah
        DS:DX -> ASCIZ name of device driver to detach from
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
SeeAlso: AX=5F09h
--------N-215F30-----------------------------
INT 21 U - LAN Manager Enhanced DOS - GET REDIRECTOR VERSION
        AX = 5F30h
Return: AX = version (AH=major,AL=minor)
--------N-215F32-----------------------------
INT 21 u - Named Pipes - LOCAL DosQNmPipeInfo
        AX = 5F32h
        BX = handle
        CX = size of _PIPEINFO structure
        DX = level (must be 0001h)
        DS:SI -> _PIPEINFO structure (see #01701)
Return: CF clear if successful
            _PIPEINFO structure filled in
        CF set on error
            AX = error code
Note:   this function was introduced by LAN Manager but is also supported by
          the Novell DOS Named Pipe Extender, Banyan VINES, OS/2 Virtual DOS
          Machines, and others
SeeAlso: AX=5F33h,AX=5F34h

Format of Named Pipes _PIPEINFO structure:
Offset  Size    Description     (Table 01701)
 00h    WORD    size of outgoing buffer
 02h    WORD    size of incoming buffer
 04h    BYTE    maximum number of instances allowed
 05h    BYTE    current number of instances
 06h    BYTE    length of the name (including terminating NUL)
 07h  N BYTEs   name
--------N-215F33-----------------------------
INT 21 u - Named Pipes - LOCAL DosQNmPHandState
        AX = 5F33h
        BX = handle
Return: CF clear if successful
            AH = pipe mode bit mask (see #01702)
            AL = maximum number of instances
        CF set on error
            AX = error code
Note:   this function was introduced by LAN Manager but is also supported by
          the Novell DOS Named Pipe Extender, Banyan VINES, OS/2 Virtual DOS
          Machines, and others
SeeAlso: AX=5F32h,AX=5F34h

Bitfields for Named Pipes pipe mode:
Bit(s)  Description     (Table 01702)
 7      set if nonblocking, clear if blocking
 6      set if server end, clear if client end
 2      set if write in message mode, clear if write in byte mode
 0      set if read in message mode, clear if read in byte mode
--------N-215F34-----------------------------
INT 21 u - Named Pipes - LOCAL DosSetNmPHandState
        AX = 5F34h
        BX = handle
        CX = pipe mode bit mask
            bit 15: set if nonblocking, clear if blocking
            bit  8: set if read in message mode, clear if read in byte mode
Return: CF clear if successful
        CF set if error
            AX = error code
Note:   this function was introduced by LAN Manager but is also supported by
          the Novell DOS Named Pipe Extender, Banyan VINES, OS/2 Virtual DOS
          Machines, and others
SeeAlso: AX=5F32h,AX=5F33h,AX=5F36h
--------N-215F35-----------------------------
INT 21 u - Named Pipes - LOCAL DosPeekNmPipe
        AX = 5F35h
        BX = handle
        CX = buffer length
        DS:SI -> buffer
Return: CF set on error
            AX = error code
        CF clear if successful (LAN Manager v1-v2)
        AX = 0000h if successful (LAN Manager 3.x)
        ---if successful---
            CX = bytes read
            SI = bytes left in the pipe
            DX = bytes left in the current message
            AX = pipe status (v1-v2) (see #01703)
            DI = pipe status (v3.x)
Note:   this function was introduced by LAN Manager but is also supported by
          the Novell DOS Named Pipe Extender, Banyan VINES, OS/2 Virtual DOS
          Machines, and others
SeeAlso: AX=5F38h,AX=5F39h,AX=5F51h

(Table 01703)
Values for pipe status:
 0001h  disconnected
 0002h  listening
 0003h  connected
 0004h  closing
--------N-215F36-----------------------------
INT 21 u - Named Pipes - LOCAL DosTransactNmPipe
        AX = 5F36h
        BX = handle
        CX = in buffer length
        DS:SI -> in buffer
        DX = out buffer length
        ES:DI -> out buffer
Return: CF clear if successful
            CX = bytes read
        CF set on error
            AX = error code
Note:   this function was introduced by LAN Manager but is also supported by
          the Novell DOS Named Pipe Extender, Banyan VINES, OS/2 Virtual DOS
          Machines, and others
SeeAlso: AX=5F34h,AX=5F37h
--------N-215F37-----------------------------
INT 21 u - Named Pipes - DosCallNmPipe
        AX = 5F37h
        DS:SI -> DosCallNmPipe stack frame (see #01704)
Return: CF clear if successful
            CX = bytes read
        CF set on error
            AX = error code
Note:   this function was introduced by LAN Manager but is also supported by
          the Novell DOS Named Pipe Extender, Banyan VINES, OS/2 Virtual DOS
          Machines, and others
SeeAlso: AX=5F36h,AX=5F38h

Format of Named Pipes DosCallNmPipe stack frame:
Offset  Size    Description     (Table 01704)
 00h    DWORD   timeout
 04h    DWORD   -> bytes read WORD (not used!)
 08h    WORD    out buffer length
 0Ah    DWORD   address of out buffer
 0Eh    WORD    in buffer length
 10h    DWORD   address of in buffer
 14h    DWORD   address of pipe name
--------N-215F38-----------------------------
INT 21 u - Named Pipes - LOCAL DosWaitNmPipe - AWAIT AVAIL. OF PIPE INSTANCE
        AX = 5F38h
        DS:DX -> pipe name
        BX:CX = timeout value
Return: CF clear if successful
        CF set if error
            AX = error code
Notes:  when a client gets a return code of ERROR_PIPE_BUSY on attempting to
          open a pipe, it should issue this call to wait until the pipe
          instance becomes available again; on return from this call, the
          client must attempt to open the pipe once again
        this function was introduced by LAN Manager but is also supported by
          the Novell DOS Named Pipe Extender, Banyan VINES, OS/2 Virtual DOS
          Machines, and others
SeeAlso: AX=5F37h,AX=5F39h
--------N-215F39-----------------------------
INT 21 U - Named Pipes - LOCAL DosRawReadNmPipe
        AX = 5F39h
        BX = handle
        CX = buffer length
        DS:DX -> buffer
Return: CF clear if successful
            CX = bytes read
        CF set if error
            AX = error code
Notes:  this function was introduced by LAN Manager but is also supported by
          the Novell DOS Named Pipe Extender, Banyan VINES, OS/2 Virtual DOS
          Machines, and others
        not documented in the LAN Manager Toolkit
SeeAlso: AX=5F35h,AX=5F3Ah,INT 2F/AX=1186h
--------N-215F3A-----------------------------
INT 21 U - Named Pipes - LOCAL DosRawWriteNmPipe
        AX = 5F3Ah
        BX = handle
        CX = buffer length
        DS:DX -> buffer
Return: CF clear if successful
            CX = bytes written
        CF set if error
            AX = error code
Notes:  this function was introduced by LAN Manager but is also supported by
          the Novell DOS Named Pipe Extender, Banyan VINES, OS/2 Virtual DOS
          Machines, and others
        not documented in the LAN Manager Toolkit
SeeAlso: AX=5F39h,AX=5F3Bh,INT 2F/AX=118Fh
--------N-215F3B-----------------------------
INT 21 u - LAN Manager Enhanced DOS - NetHandleSetInfo
        AX = 5F3Bh
        BX = handle
        CX = handle_info_1 structure length or sizeof DWORD
        DI = parameter number to set
            0000h all
            0001h number of milliseconds
            0002h number of characters
        DS:DX -> handle_info_1 structure (DI=0000h) (see #01705)
                or DWORD (DI=0001h or 0002h)
        SI = level of information (0001h)
Return: CF clear if successful
            CX = total bytes available
        CF set if error
            AX = error code
SeeAlso: AX=5F3Ch

Format of LAN Manager handle_info_1 structure:
Offset  Size    Description     (Table 01705)
 00h    DWORD   number of milliseconds which workstation collects data before
                  it sends the data to the named pipe
 04h    DWORD   number of characters which workstation collects before it
                  sends the data to the named pipe
--------N-215F3C-----------------------------
INT 21 u - LAN Manager Enhanced DOS - NetHandleGetInfo
        AX = 5F3Ch
        BX = handle
        CX = length of handle_info_1 structure
        DS:DX -> handle_info_1 structure (see #01705)
        SI = level of information (must be 0001h)
Return: CF clear if successful
            CX = total bytes available
        CF set if error
            AX = error code
SeeAlso: AX=5F3Bh
--------N-215F3D-----------------------------
INT 21 U - LAN Manager Enhanced DOS - WRITE MAILSLOT???
        AX = 5F3Dh
        ???
Return: ???
--------N-215F3E-----------------------------
INT 21 u - LAN Manager Enhanced DOS - LOCAL NetSpecialSMB
        AX = 5F3Eh
        ???
Return: ???
Note:   This function is not documented anywhere in the LAN Manager 2.x Toolkit
          but was documented in LAN Manager 1.x manuals.
--------N-215F3F-----------------------------
INT 21 U - LAN Manager Enhanced DOS - REMOTE API CALL
        AX = 5F3Fh
        CX = api number
        ES:DI -> data descriptor
        ES:SI -> parameter descriptor
        ES:DX -> auxiliary descriptor (if DX <> 0)
        ???
Return: ???
--------N-215F40-----------------------------
INT 21 u - LAN Manager Enhanced DOS - LOCAL NetMessageBufferSend
        AX = 5F40h
        DS:DX -> NetMessageBufferSend parameter structure (see #01706)
Return: AX = error code

Format of LAN Manager NetMessageBufferSend parameter structure:
Offset  Size    Description     (Table 01706)
 00h    DWORD   -> recipient name (name for specific user, name* for domain
                      wide name, * for broadcast)
 04h    DWORD   -> buffer
 08h    WORD    length of buffer
--------N-215F41-----------------------------
INT 21 u - LAN Manager Enhanced DOS - LOCAL NetServiceEnum
        AX = 5F41h
        BL = level of detail (0000h, 0001h or 0002h)
        CX = buffer length
        ES:DI -> buffer of service_info_0, service_info_1, or service_info_2
                (see #01707,#01708,#01709)
Return: CF clear if successful
            CX = entries read
            DX = total available
        CF set on error
            AX = error code

Format of LAN Manager service_info_0 structure:
Offset  Size    Description     (Table 01707)
 00h 16 BYTEs   name
SeeAlso: #01708,#01709

Format of service_info_1 structure:
Offset  Size    Description     (Table 01708)
 00h 16 BYTEs   name
 10h    WORD    status bitmask (see #01710)
 12h    DWORD   status code (see #01711)
                (also see Microsoft LAN Manager Programmer's Reference)
 16h    WORD    process id
SeeAlso: #01707,#01709

Format of service_info_2 structure:
Offset  Size    Description     (Table 01709)
 00h 16 BYTEs   name
 10h    WORD    status bitmask (see #01710)
 12h    DWORD   status code (see #01711)
 16h    WORD    process id
 18h 64 BYTEs   text
SeeAlso: #01707,#01708

Bitfields for LAN Manager status bitmask:
Bit(s)  Description     (Table 01710)
 0,1    00 uninstall
                01 install pending
                10 uninstall pending
                11 installed
 2,3    00 active
                01 Continue pending
                10 Pause pending
                11 paused
 4      uninstallable
 5      pausable
 8      disk redirector paused
 9      spooled device redirector paused (printing)
 10     communication device redirector paused

(Table 01711)
Values for LAN Manager status code:
 high word
    3051 Bad parameter value
    3052 A parameter is missing
    3053 An unknown parameter was specified
    3054 The resource is insufficient
    3055 Configuration is faulty
    3056 An MS-DOS or MS OS/2 error occured
    3057 An internal error occured
    3058 An ambiguous parameter name was given
    3059 A duplicate parameter exists
    3060 The service was terminated by NetSeviceControl when it did not respond
    3061 The service program file could not be executed
    3062 The subservice failed to start
    3063 There is a conflict in the value or use of these parameters
    3064 There is a problem with the file
 low word
    3070 There is insufficient memory
    3071 There is insufficeient disk space
    3072 Unable to create thread
    3073 Unable to create process
    3074 A security failure occured
    3075 There is bad or missing default path
    3076 Network software is not installed
    3077 Server software is not installed
    3078 The server could not access the UAS database
    3079 The action requires user-level security
    3080 The log directory is invalid
    3081 The LAN group specificed could not be used
    3082 The computername is being used as a message alias on another computer
    3083 The workstation failed to announce the servername
    3084 The user accounts system is not configured properly
--------N-215F42-----------------------------
INT 21 u - LAN Manager Enhanced DOS - LOCAL NetServiceControl
        AX = 5F42h
        DH = opcode
            00h interrogate status
            01h pause
            02h continue
            03h uninstall
        DL = argument
            01h disk resource
            02h print resource
            04h communications resource (not implemented for DOS)
        ES:BX -> NetServiceControl parameter structure (see #01712)
Return: CF clear if successful
        CF set on error
            AX = error code

Format of LAN Manager NetServiceControl parameter structure:
Offset  Size    Description     (Table 01712)
 00h    DWORD   -> service name
 04h    WORD    result buffer size
 06h    DWORD   -> result buffer as service_info_2 structure
--------N-215F43-----------------------------
INT 21 u - LAN Manager Enhanced DOS - LOCAL DosPrintJobGetId
        AX = 5F43h
        BX = handle of remote print job
        CX = size of PRIDINFO struture
        ES:DI -> PRIDINFO structure (see #01713)
Return: CF clear if successful
            PRIDINFO filled in
        CF set on error
            AX = error code

Format of LAN Manager PRIDINFO structure:
Offset  Size    Description     (Table 01713)
 00h    WORD    job id
 02h 16 BYTEs   server name
 12h 13 BYTEs   queue name
 1Fh  1 BYTE    pad
--------N-215F44-----------------------------
INT 21 - LAN Manager Enhanced DOS - LOCAL NetWkstaGetInfo
        AX = 5F44h
        BX = information level (00h, 01h, or 0Ah)
        CX = buffer size
        DX = 0000h
        ES:DI -> buffer in which to store info (see #01714,#01715,#01716),
              including any returned strings
Return: AX = error code
        DX = amount of buffer required, unchanged if supplied buffer large
              enough to hold data
SeeAlso: AX=5F45h,AX=5F49h

Format of LAN Manager wksta_info_0 structure:
Offset  Size    Description     (Table 01714)
 00h    WORD     reserved (0)
 02h    DWORD    reserved (0)
 06h    DWORD    -> path to computer's LANMAN directory
 0Ah    DWORD    -> computername of the workstation
 0Eh    DWORD    -> username of user logged onto workstation
 12h    DWORD    -> domain to which workstation belongs
 16h    WORD     LAN Manager version number (2 bytes, Major, Minor)
 18h    DWORD    reserved (0)
 1Ch    WORD     number of seconds workstation waits for resource availability
 1Eh    DWORD    delay (in millsecs) before sending data to resource
 22h    WORD     reserved (0)
 24h    WORD     reserved (0)
 26h    WORD     ???
 28h    WORD     number of seconds to maintain an inactive connection
 2Ah    WORD     number of seconds an inactive search continues
 2Ch    WORD     threads to dedicate to network (not supported in MSDOS)
 2Eh    WORD     number of simultaneous commands sent to network
 30h    WORD     reserved6 (must be 0)
 32h    WORD     number of internal buffers
 34h    WORD     size (in bytes) of each internal buffer
 36h    WORD     max size (in bytes) of an internal cache buffer (not MSDOS)
 38h    WORD     seconds before disconnecting inactive session (not MSDOS)
 3Ah    WORD     size (in bytes) of an internal error buffer (not MSDOS)
 3Ch    WORD     number of clients that can receive alert messages (not MSDOS)
 3Eh    WORD     number of services that can be started on workstation
 40h    WORD     max size (in kilobytes) of error log (not MSDOS)
 42h    WORD     number of secs before closing inactive print jobs (not MSDOS)
 44h    WORD     number of character buffers for workstation
 46h    WORD     max size (in bytes) of character buffer
 48h    DWORD    -> name of server that validated logon
 4Ch    DWORD    -> workstation heuristics
 50h    WORD     number of mailslots allowed
Note:   pointers to strings are set to 0000h:0000h if there is insufficient
          space in the buffer to hold them
SeeAlso: #01715,#01716

Format of LAN Manager wksta_info_1 structure:
Offset  Size    Description     (Table 01715)
 00h 82 BYTEs   wksta_info_0 structure (see #01714)
 52h    DWORD    -> name of domain which user is logged on to
 56h    DWORD    -> all domains in which computer is enlisted
 5Ah    WORD     number of buffers to allocate for receiving datagrams
SeeAlso: #01716

Format of LAN Manager wksta_info_10 structure:
Offset  Size    Description     (Table 01716)
 00h    DWORD    -> computername of the workstation
 04h    DWORD    -> username of user logged onto workstation
 08h    DWORD    -> domain to which workstation belongs
 0Ch    WORD     LAN Manager version number (2 bytes, Major, Minor)
 0Eh    DWORD    -> name of domain which user is loggod on to
 12h    DWORD    -> all domains in which computer is enlisted
Note:   pointers to strings are set to 0000h:0000h if there is insufficient
          space in the buffer to hold them
SeeAlso: #01714,#01715
--------N-215F45-----------------------------
INT 21 u - LAN Manager Enhanced DOS - LOCAL NetWkstaSetInfo
        AX = 5F45h
        BX = level (0000h or 0001h)
        CX = buffer size
        DX = parameter to set
        ES:DI -> buffer
Return: CF clear if successful
        CF set if error
            AX = error code
SeeAlso: AX=5F44h
--------N-215F46-----------------------------
INT 21 u - LAN Manager Enhanced DOS - LOCAL NetUseEnum
        AX = 5F46h
        BX = level (0000h or 0001h)
        CX = size of buffer
        ES:DI -> buffer of use_info_0 or use_info_1 structures
                  (see #01717,#01718)
Return: CF clear if successful
            CX = entries read
            DX = total available entries
        CF set if error
            AX = error code
SeeAlso: AX=5F47h,AX=5F48h,AX=5F4Ch

Format of LAN Manager use_info_0 structure:
Offset  Size    Description     (Table 01717)
 00h  9 BYTEs   local device name
 09h    BYTE    padding
 0Ah    DWORD   -> remote device name in UNC form \\server\share
SeeAlso: #01718

Format of LAN Manager use_info_1 structure:
Offset  Size    Description     (Table 01718)
 00h  9 BYTEs   Local device name
 09h    BYTE    padding
 0Ah    DWORD   -> remote device name in UNC form \\server\share
 0Eh    DWORD   -> password
 12h    WORD    network link status
                (00h OK, 02h disconnected, else unsure)
 14h    WORD    use type (-1 wildcard, 0 disk, 1 print, 2 com, 3 ipc)
 16h    WORD    ignored
 18h    WORD    ignored
SeeAlso: #01717
--------N-215F47-----------------------------
INT 21 u - LAN Manager Enhanced DOS - LOCAL NetUseAdd
        AX = 5F47h
        BX = level (0001h)
        CX = size of use_info_1 structure
        ES:DI -> use_info_1 structure (see #01718)
Return: CF clear on success
        CF set on error
            AX = error code
SeeAlso: AX=5F46h,AX=5F48h
--------N-215F48-----------------------------
INT 21 u - LAN Manager Enhanced DOS - LOCAL NetUseDel
        AX = 5F48h
        BX = force level
            0000h no force
            0001h force
            0002h lots of force
        ES:DI -> buffer as either the local device name or UNC remote name
Return: CF clear on success
        CF set on error
            AX = error code
SeeAlso: AX=5F46h,AX=5F48h,AX=5F49h
--------N-215F49-----------------------------
INT 21 u - LAN Manager Enhanced DOS - NetUseGetInfo
        AX = 5F49h
        DS:DX -> NetUseGetInfo parameter structure (see #01719)
Return: CF clear on success
            DX = total available
        CF set on error
            AX = error code
SeeAlso: AX=5F44h,AX=5F47h

Format of LAN Manager NetUseGetInfo parameter structure:
Offset  Size    Description     (Table 01719)
 00h    DWORD   pointer to either the local device name or UNC remote name
 04h    WORD    level of information (0000h or 0001h)
 06h    DWORD   pointer to buffer of use_info_0 or use_info_1 structures
 0Ah    WORD    length of buffer
--------N-215F4A-----------------------------
INT 21 u - LAN Manager Enhanced DOS - LOCAL NetRemoteCopy
        AX = 5F4Ah
        DS:DX -> NetRemoteCopy parameter structure (see #01720)
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AX=5F4Bh

Format of LAN Manager NetRemoteCopy parameter structure:
Offset  Size    Description     (Table 01720)
 00h    DWORD   -> source name as UNC
 04h    DWORD   -> destination name as UNC
 08h    DWORD   -> source password
 0Ch    DWORD   -> destination password
 10h    WORD    destination open bitmap
                if destination path exists
                    0000h open fails
                    0001h file is appended
                    0002h file is overwritten
                if destination path doesn't exist
                    0000h open fails
                    0010h file is created
 12h    WORD    copy control bitmap (see #01721)
 14h    DWORD   -> copy_info buffer
 18h    WORD    length of copy_info buffer

Bitfields for LAN Manager copy control:
Bit(s)  Description     (Table 01721)
 0      destination must be a file
 1      destination must be a directory
 2      destination is opened in ascii mode instead of binary
 3      source is opened in ascii mode instead of binary
 4      verify all write operations
--------N-215F4B-----------------------------
INT 21 u - LAN Manager Enhanced DOS - LOCAL NetRemoteMove
        AX = 5F4Bh
        DS:DX -> NetRemoteMove parameter structure (see #01722)
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AX=5F4Ah

Format of LAN Manager NetRemoteMove parameter structure:
Offset  Size    Description     (Table 01722)
 00h    DWORD   -> source name as UNC
 04h    DWORD   -> destination name as UNC
 08h    DWORD   -> source password
 0Ch    DWORD   -> destination password
 10h    WORD    destination open bitmap
                if destination path exists
                    0000h open fails
                    0001h file is appended
                    0002h file is overwritten
                if destination path doesn't exist
                    0000h open fails
                    0010h file is created
 12h    WORD    move control bitmap
                    0001h destination must be a file
                    0002h destination must be a directory
 14h    DWORD   -> move_info buffer
 18h    WORD    length of move_info buffer
--------N-215F4C-----------------------------
INT 21 u - LAN Manager Enhanced DOS - LOCAL NetServerEnum
        AX = 5F4Ch
        BX = level (0000h or 0001h)
        CX = buffer length
        ES:DI -> buffer in which to store information
Return: CF clear if successful
            ES:DI -> server_info_X structures (depending on level)
                  (see #01723,#01724)
            BX = entries read
            CX = total entries available
        CF set on error
            AX = error code
Notes:  this function is also supported by the Novell DOS Named Pipe Extender
        this function has been obseleted by NetServerEnum2
SeeAlso: AX=5F53h

Format of LAN Manager server_info_0 structure:
Offset  Size    Description     (Table 01723)
 00h 16 BYTEs   name
SeeAlso: #01724

Format of LAN Manager server_info_1 structure:
Offset  Size    Description     (Table 01724)
 00h 16 BYTEs   name
 10h    BYTE    major version in lower nibble
 11h    BYTE    minor version
 12h    DWORD   server type bitmask (see #01725)
 16h    DWORD   -> comment string
SeeAlso: #01723

Bitfields for LAN Manager server type:
Bit(s)  Description     (Table 01725)
 0      workstation
 1      server
 2      SQL server
 3      primary domain controller
 4      backup domain controller
 5      time server
 6      Apple File Protocol (AFP) server
 7      Novell server
 8      Domain Member (v2.1+)
 9      Print Queue server (v2.1+)
 10     Dialin server (v2.1+)
 11     Unix server (v2.1+)
Note:   set all (FFFFFFFFh) for All Types
--------N-215F4D-----------------------------
INT 21 u - LAN Manager Enhanced DOS - DosMakeMailslot
        AX = 5F4Dh
        BX = message size
        CX = mailslot size (must be bigger than message size by at least 1)
                           (minimum 1000h, maximum FFF6h)
                           (buffer must be 9 bytes bigger than this)
        DS:SI -> name
        ES:DI -> memory buffer
Return: CF clear if successful
            AX = handle
        CF set on error
            AX = error code
SeeAlso: AX=5F4Eh,AX=5F4Fh,AX=5F50h,AX=5F51h
--------N-215F4E-----------------------------
INT 21 u - LAN Manager Enhanced DOS - DosDeleteMailslot
        AX = 5F4Eh
        BX = handle
Return: CF clear if successful
            ES:DI -> memory to be freed (allocated during DosMakeMailslot)
        CF set on error
            AX = error code
SeeAlso: AX=5F4Dh,AX=5F4Fh
--------N-215F4F-----------------------------
INT 21 u - LAN Manager Enhanced DOS - DosMailslotInfo
        AX = 5F4Fh
        BX = handle
Return: CF clear if successful
            AX = max message size
            BX = mailslot size
            CX = next message size
            DX = next message priority
            SI = number of messages waiting
        CF set on error
            AX = error code
SeeAlso: AX=5F4Dh,AX=5F4Eh,AX=5F50h
--------N-215F50-----------------------------
INT 21 u - LAN Manager Enhanced DOS - DosReadMailslot
        AX = 5F50h
        BX = handle
        DX:CX = timeout
        ES:DI -> buffer
Return: CF clear if successful
            AX = bytes read
            CX = next item's size
            DX = next item's priority
        CF set on error
            AX = error code
SeeAlso: AX=5F4Dh,AX=5F4Fh,AX=5F51h,AX=5F52h
--------N-215F51-----------------------------
INT 21 u - LAN Manager Enhanced DOS - DosPeekMailslot
        AX = 5F51h
        BX = handle
        ES:DI -> buffer
Return: CF clear if successful
            AX = bytes read
            CX = next item's size
            DX = next item's priority
        CF set on error
            AX = error code
SeeAlso: AX=5F35h,AX=5F4Fh,AX=5F50h,AX=5F52h
--------N-215F52-----------------------------
INT 21 u - LAN Manager Enhanced DOS - DosWriteMailslot
        AX = 5F52h
        BX = class
        CX = length of buffer
        DX = priority
        ES:DI -> DosWriteMailslot parameter structure (see #01726)
        DS:SI -> mailslot name
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AX=5F4Fh,AX=5F50h,AX=5F51h

Format of LAN Manager DosWriteMailslot parameter structure:
Offset  Size    Description     (Table 01726)
 00h    DWORD   timeout
 04h    DWORD   -> buffer
--------N-215F53-----------------------------
INT 21 u - LAN Manager Enhanced DOS - NetServerEnum2
        AX = 5F53h
        DS:SI -> NetServerEnum2 parameter structure (see #01727)
Return: CF clear if successful
            BX = entries read
            CX = total entries available
        CF set on error
            AX = error code
SeeAlso: AX=5F4Ch

Format of LAN Manager NetServerEnum2 parameter structure:
Offset  Size    Description     (Table 01727)
 00h    WORD    level (0000h or 0001h)
 02h    DWORD   -> buffer as array of server_info_??? structures (see #01723)
 06h    WORD    length of buffer
 08h    DWORD   server type bitmask (see #01725)
 0Ch    DWORD   -> Domain name (may be 0000h:0000h for all local domains)
--------N-215F55----------------------------
INT 21 U - LAN Manager Enhanced DOS - KILL ALL CONNECTIONS???
        AX = 5F55h
        BX = ???
Return: CF clear if successful
        CF set on error
            AX = error code
--------N-215F80-----------------------------
INT 21 - LANtastic - GET LOGIN ENTRY
        AX = 5F80h
        BX = login entry index (0-based)
        ES:DI -> 16-byte buffer for machine name
Return: CF clear if successful
            buffer filled with machine name ("\\" prefix removed)
            DL = adapter number (v3+)
        CF set on error
            AX = error code
Note:   the login entry index corresponds to the value BX used in AX=5F83h
SeeAlso: AX=5F83h
--------N-215F81-----------------------------
INT 21 - LANtastic - LOGIN TO SERVER
        AX = 5F81h
        ES:DI -> ASCIZ login path followed immediately by ASCIZ password
        BL = adapter number
            FFh try all valid adapters
            00h-07h try only specified adapter
Return: CF clear if successful
        CF set on error
            AX = error code
Notes:  login path is of form "\\machine\username"
        if no password is used, the string at ES:DI must be terminated with
          three NULs for compatibility with LANtastic v3.0.
SeeAlso: AX=5F82h,AX=5F84h
--------N-215F82-----------------------------
INT 21 - LANtastic - LOGOUT FROM SERVER
        AX = 5F82h
        ES:DI -> ASCIZ server name (in form "\\machine")
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AX=5F81h,AX=5F88h,AX=5FCBh
--------N-215F83-----------------------------
INT 21 - LANtastic - GET USERNAME ENTRY
        AX = 5F83h
        BX = login entry index (0-based)
        ES:DI -> 16-byte buffer for username currently logged into
Return: CF clear if successful
            DL = adapter number (v3+)
        CF set on error
            AX = error code
Note:   the login entry index corresponds to the value BX used in AX=5F80h
SeeAlso: AX=5F80h
--------N-215F84-----------------------------
INT 21 - LANtastic - GET INACTIVE SERVER ENTRY
        AX = 5F84h
        BX = server index not currently logged into
        ES:DI -> 16-byte buffer for server name which is available for logging
                in to ("\\" prefix omitted)
Return: CF clear if successful
            DL = adapter number to non-logged in server is on
        CF set on error
            AX = error code
SeeAlso: AX=5F81h
--------N-215F85-----------------------------
INT 21 - LANtastic - CHANGE PASSWORD
        AX = 5F85h
        ES:DI -> buffer containing "\\machine\oldpassword" 00h "newpassword"00h
Return: CF clear if successful
        CF set on error
            AX = error code
Notes:  must be logged into the named machine
        this function is illegal for group accounts
--------N-215F86-----------------------------
INT 21 - LANtastic - DISABLE ACCOUNT
        AX = 5F86h
        ES:DI -> ASCIZ machine name and password in form "\\machine\password"
Return: CF clear if successful
        CF set on error
            AX = error code
Note:   must be logged into the named machine and concurrent logins set to 1
          by NET_MGR.  Requires system manager to re-enable account.
--------N-215F87-----------------------------
INT 21 - LANtastic v3+ - GET ACCOUNT
        AX = 5F87h
        DS:SI -> 128-byte buffer for account information (see #01728)
        ES:DI -> ASCIZ machine name in form "\\machine"
Return: CF clear if successful
        CF set on error
            AX = error code
        BX destroyed
Note:   must be logged into the specified machine

Format of LANtastic user account structure:
Offset  Size    Description     (Table 01728)
 00h 16 BYTEs   blank-padded username (zero-padded for v4.x)
 10h 16 BYTEs   reserved (00h)
 20h 32 BYTEs   user description
 40h    BYTE    privilege bits (see #01729)
 41h    BYTE    maximum concurrent users
 42h 42 BYTEs   bit map for disallowed half hours, beginning on Sunday
                (bit set if half-hour not an allowed time)
 6Ch    WORD    internal (0002h)
 6Eh  2 WORDs   last login time
 72h  2 WORDs   account expiration date (MS-DOS-format year/month:day)
 76h  2 WORDs   password expiration date (0 = none)
 7Ah    BYTE    number of days to extend password after change (1-31)
                00h if no extension required
---v3.x---
 7Bh  5 BYTEs   reserved
---v4.x---
 7Bh    BYTE    storage for first letter of user name when deleted (first
                  character is changed to 00h when deleting account)
 7Ch    BYTE    extended privileges
 7Dh  3 BYTEs   reserved

Bitfields for LANtastic privilege bits:
Bit(s)  Description     (Table 01729)
 7      bypass access control lists
 6      bypass queue protection
 5      treat as local process
 4      bypass mail protection
 3      allow audit entry creation
 2      system manager
 0      user cannot change password
--------N-215F88-----------------------------
INT 21 - LANtastic v4.0+ - LOGOUT FROM ALL SERVERS
        AX = 5F88h
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AX=5F82h
--------N-215F97-----------------------------
INT 21 - LANtastic - COPY FILE
        AX = 5F97h
        CX:DX = number of bytes to copy (FFFFFFFFh = entire file)
        SI = source file handle
        DI = destination file handle
Return: CF clear if successful
            DX:AX = number of bytes copied
        CF set on error
            AX = error code
Note:   copy is performed by server
--------N-215F98-----------------------------
INT 21 - LANtastic - SEND UNSOLICITED MESSAGE
        AX = 5F98h
        DS:SI -> message buffer (see #01730)
Return: CF clear if successful
        CF set on error
            AX = error code
Note:   v4.1- return no errors
SeeAlso: AX=5F99h

Format of LANtastic message buffer:
Offset  Size    Description     (Table 01730)
 00h    BYTE    reserved
 01h    BYTE    message type
                00h general
                01h server warning
                02h-7Fh reserved
                80h-FFh user-defined
 02h 16 BYTEs   ASCIZ destination machine name
 12h 16 BYTEs   ASCIZ server name which user must be logged into
 22h 16 BYTEs   ASCIZ user name
 32h 16 BYTEs   ASCIZ originating machine name (filled in when received)
 42h 80 BYTEs   message text
--------N-215F99-----------------------------
INT 21 - LANtastic - GET LAST RECEIVED UNSOLICITED MESSAGE
        AX = 5F99h
        ES:DI -> messsage buffer (see #01730)
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AX=5F98h
--------N-215F9A-----------------------------
INT 21 - LANtastic - GET MESSAGE PROCESSING FLAGS
        AX = 5F9Ah
Return: CF clear if successful
            DL = bits describing processing of received messages (see #01731)
        CF set on error
            AX = error code
SeeAlso: AX=5F9Bh,AX=5F9Ch,AX=5F9Dh

Bitfields for unsolicited message processing flags:
Bit(s)  Description     (Table 01731)
 0      beep before message is delivered
 1      deliver message to message service
 2      pop up message automatically (v3+)
--------N-215F9B-----------------------------
INT 21 - LANtastic - SET MESSAGE PROCESSING FLAGS
        AX = 5F9Bh
        DL = bits describing processing for received unsolicited messages
             (see #01731)
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AX=5F9Ah,AX=5F9Eh
--------N-215F9C-----------------------------
INT 21 - LANtastic v3+ - POP UP LAST RECEIVED MESSAGE
        AX = 5F9Ch
        CX = time to leave on screen in clock ticks
        DH = 0-based screen line on which to place message
Return: CF clear if successful
        CF set on error
            AX = error code (0Bh)
Notes:  the original screen contents are restored when the message is removed
        the message will not appear, and an error will be returned, if the
          screen is in a graphics mode
SeeAlso: AX=5F9Ah
--------N-215F9D-----------------------------
INT 21 - LANtastic v4.1+ - GET REDIRECTOR CONTROL BITS
        AX = 5F9Dh
Return: DL = redirector control bits
                bit 7: set to notify on print job completion
SeeAlso: AX=5F9Ah,AX=5F9Eh
--------N-215F9E-----------------------------
INT 21 - LANtastic v4.1+ - SET REDIRECTOR CONTROL BITS
        AX = 5F9Eh
        DL = redirector control bits (see AX=5F9Dh)
Return: nothing
SeeAlso: AX=5F9Bh,AX=5F9Dh
--------N-215FA0-----------------------------
INT 21 - LANtastic - GET QUEUE ENTRY
        AX = 5FA0h
        BX = queue entry index (0000h is first entry)
        DS:SI -> buffer for queue entry (see #01732)
        ES:DI -> ASCIZ server name in form "\\name"
Return: CF clear if successful
        CF set on error
            AX = error code
        BX = entry index for next queue entry (BX-1 is current index)
SeeAlso: AX=5FA1h,AX=5FA2h

Format of LANtastic queue entry:
Offset  Size    Description     (Table 01732)
 00h    BYTE    status of entry (see #01733)
 01h    DWORD   size of spooled file
 05h    BYTE    type of entry (see #01734)
 06h    BYTE    output control (see #01735)
 07h    WORD    number of copies
 09h    DWORD   sequence number of queue entry
 0Dh 48 BYTEs   pathname of spooled file
 3Dh 16 BYTEs   user who spooled file
 4Dh 16 BYTEs   name of machine from which file was spooled
 5Dh    WORD    date file was spooled (see #01666 at AX=5700h)
 5Fh    WORD    time file was spooled (see #01665 at AX=5700h)
 61h 17 BYTEs   ASCIZ destination device or user name
 72h 48 BYTEs   comment field

(Table 01733)
Values for status of LANtastic queue entry:
 00h    empty
 01h    being updated
 02h    being held
 03h    waiting for despool
 04h    being despooled
 05h    canceled
 06h    spooled file could not be accessed
 07h    destination could not be accessed
 08h    rush job

(Table 01734)
Values for type of LANtastic queue entry:
 00h    printer queue file
 01h    message
 02h    local file
 03h    remote file
 04h    to remote modem
 05h    batch processor file

Bitfields for output control:
Bit(s)  Description     (Table 01735)
 6      don't delete (for mail)
 5      mail file contains voice mail (v3+)
 4      mail message has been read
 3      response has been requested for this mail
--------N-215FA1-----------------------------
INT 21 - LANtastic - SET QUEUE ENTRY
        AX = 5FA1h
        BX = handle of opened queue entry
        DS:SI -> queue entry (see #01732)
Return: CF clear if successful
        CF set on error
            AX = error code
Notes:  the only queue entry fields which may be changed are output control,
          number of copies, destination device, and comment
        the handle in BX is that from a create or open (INT 21/AH=3Ch,3Dh)
          call on the file "\\server\\@MAIL" or "\\server\@name" (for
          printer queue entries)
SeeAlso: AX=5FA0h,AX=5FA2h,AX=5FA9h
--------N-215FA2-----------------------------
INT 21 - LANtastic - CONTROL QUEUE
        AX = 5FA2h
        BL = control command
            00h start despooling (privileged)
            01h halt despooling (privileged)
            02h halt despooling at end of job (privileged)
            03h pause despooler at end of job (privileged)
            04h print single job (privileged)
            05h restart current job (privileged)
            06h cancel the current job
            07h hold queue entry
            08h release a held queue entry
            09h make queue entry a rushed job (privileged)
        CX:DX = sequence number to control (commands 06h-09h)
        DX = physical printer number (commands 00h-05h)
            00h-02h LPT1-LPT3
            03h,04h COM1,COM2
            other       all printers
        ES:DI -> ASCIZ server name in form "\\machine"
Return: CF clear if successful
        CF set on error
            AX = error code
--------N-215FA3-----------------------------
INT 21 - LANtastic v3+ - GET PRINTER STATUS
        AX = 5FA3h
        BX = physical printer number (00h-02h = LPT1-LPT3, 03h-04h = COM1-COM2)
        DS:SI -> buffer for printer status (see #01736)
        ES:DI -> ASCIZ server name in form "\\machine"
Return: CF clear if successful
        CF set on error
            AX = error code
        BX = next physical printer number
Note:   you must be logged in to the specified server

Format of LANtastic printer status:
Offset  Size    Description     (Table 01736)
 00h    BYTE    printer state (see #01737)
 01h    WORD    queue index of print job being despooled
                FFFFh if not despooling--ignore all following fields
 03h    WORD    actual characters per second being output
 05h    DWORD   number of characters actually output so far
 09h    DWORD   number of bytes read from spooled file so far
 0Dh    WORD    copies remaining to print

Bitfields for LANtastic printer state:
Bit(s)  Description     (Table 01737)
 7      printer paused
 0-6    0 printer disabled
        1 will stop at end of job
        2 print multiple jobs
--------N-215FA4-----------------------------
INT 21 - LANtastic v3+ - GET STREAM INFO
        AX = 5FA4h
        BX = 0-based stream index number
        DS:SI -> buffer for stream information (see #01738)
        ES:DI -> ASCIZ machine name in form "\\machine"
Return: CF clear if successful
        CF set on error
            AX = error code
        BX = next stream number
SeeAlso: AX=5FA5h

Format of LANtastic stream information:
Offset  Size    Description     (Table 01738)
 00h    BYTE    queueing of jobs for logical printer (0=disabled,other=enabled)
 01h 11 BYTEs   logical printer resource template (may contain ? wildcards)
--------N-215FA5-----------------------------
INT 21 - LANtastic v3+ - SET STREAM INFO
        AX = 5FA5h
        BX = 0-based stream index number
        DS:SI -> buffer containing stream information (see #01738)
        ES:DI -> ASCIZ machine name in form "\\machine"
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AX=5FA4h
--------N-215FA7-----------------------------
INT 21 - LANtastic - CREATE USER AUDIT ENTRY
        AX = 5FA7h
        DS:DX -> ASCIZ reason code (max 8 bytes)
        DS:SI -> ASCIZ variable reason string (max 128 bytes)
        ES:DI -> ASCIZ machine name in form "\\machine"
Return: CF clear if successful
        CF set on error
            AX = error code
Note:   you must be logged in to the specified server and have the "U"
          privilege to execute this call
--------N-215FA9-----------------------------
INT 21 - LANtastic v4.1+ - SET EXTENDED QUEUE ENTRY
        AX = 5FA9h
        BX = handle of opened queue entry
        DS:SI -> queue entry (see #01732)
Return: CF clear if successful
        CF set on error
            AX = error code
Note:   functions exactly the same as AX=5FA1h except the spooled filename is
          also set.  This call supports direct despooling.
SeeAlso: AX=5FA1h
--------N-215FB0-----------------------------
INT 21 - LANtastic - GET ACTIVE USER INFORMATION
        AX = 5FB0h
        BX = server login entry index
        DS:SI -> buffer for active user entry (see #01739)
        ES:DI -> ASCIZ machine name in form "\\server"
Return: CF clear if successful
        CF set on error
            AX = error code
        BX = next login index
SeeAlso: AX=5FB2h

Format of LANtastic active user entry:
Offset  Size    Description     (Table 01739)
 00h    WORD    virtual circuit number
 02h    BYTE    login state (see #01740)
 03h    BYTE    last command issued (see #01741)
 04h  5 BYTEs   number of I/O bytes (40-bit unsigned number)
 09h  3 BYTEs   number of server requests (24-bit unsigned)
 0Ch 16 BYTEs   name of user who is logged in
 1Ch 16 BYTEs   name of remote logged in machine
 2Ch    BYTE    extended privileges (v4+???)
                bit 0: user cannot change his password
 2Dh    WORD    time left in minutes (0000h = unlimited) (v4+???)

Bitfields for login state:
Bit(s)  Description     (Table 01740)
 0      fully logged in
 1      remote program load login
 2      user has system manager privileges
 3      user can create audit entries
 4      bypass mail protection
 5      treat as local process
 6      bypass queue protection
 7      bypass access control lists

(Table 01741)
Values for last LANtastic command:
 00h    login
 01h    process termination
 02h    open file
 03h    close file
 04h    create file
 05h    create new file
 06h    create unique file
 07h    commit data to disk
 08h    read file
 09h    write file
 0Ah    delete file
 0Bh    set file attributes
 0Ch    lock byte range
 0Dh    unlock byte range
 0Eh    create subdirectory
 0Fh    remove subdirectory
 10h    rename file
 11h    find first matching file
 12h    find next matching file
 13h    get disk free space
 14h    get a queue entry
 15h    set a queue entry
 16h    control the queue
 17h    return login information
 18h    return link description
 19h    seek on file
 1Ah    get server's time
 1Bh    create audit entry
 1Ch    open file in multitude of modes
 1Dh    change password
 1Eh    disable account
 1Fh    local server file copy
---v3+---
 20h    get username from account file
 21h    translate server's logical path
 22h    make indirect file
 23h    get indirect file contents
 24h    get physical printer status
 25h    get logical print stream info
 26h    set logical print stream info
 27h    get user's account record
---v4+---
 28h    request server shutdown
 29h    cancel server shutdown
 2Ah    stuff server's keyboard
 2Bh    write then commit data to disk
 2Ch    set extended queue entry
 2Dh    terminate user from server
 2Eh    enable/disable logins
 2Fh    flush server caches
 30h    change username
 31h    get extended queue entry
        (same as get queue, but can return named fields blanked)
--------N-215FB1-----------------------------
INT 21 - LANtastic - GET SHARED DIRECTORY INFORMATION
        AX = 5FB1h
        DS:SI -> 64-byte buffer for link description
        ES:DI -> ASCIZ machine and shared directory name in form
                 "\\machine\shared-resource"
Return: CF clear if successful
            CX = access control list privileges for requesting user (see #01742)
        CF set on error
            AX = error code

Bitfields for LANtastic access control list:
Bit(s)  Description     (Table 01742)
 4      (I) allow expansion of indirect files
 5      (A) allow attribute changing
 6      (P) allow physical access to device
 7      (E) allow program execution
 8      (N) allow file renaming
 9      (K) allow directory deletion
 10     (D) allow file deletion
 11     (L) allow file/directory lookups
 12     (M) allow directory creation
 13     (C) allow file creation
 14     (W) allow open for write and writing
 15     (R) allow open for read and reading
--------N-215FB2-----------------------------
INT 21 - LANtastic v3+ - GET USERNAME FROM ACCOUNT FILE
        AX = 5FB2h
        BX = username entry index (0 for first)
        DS:SI -> 16-byte buffer for username
        ES:DI -> ASCIZ server name in form "\\machine"
Return: CF clear if successful
        CF set on error
            AX = error code
        BX = next queue entry index
SeeAlso: AX=5FB0h
--------N-215FB3-----------------------------
INT 21 - LANtastic v3+ - TRANSLATE PATH
        AX = 5FB3h
        DS:SI -> 128-byte buffer for ASCIZ result
        ES:DI -> full ASCIZ path, including server name
        DX = types of translation to be performed
            bit 0: expand last component as indirect file
            bit 1: return actual path relative to server's physical disk
Return: CF clear if successful
        CF set on error
            AX = error code
Note:   always expands any indirect files along the path
SeeALso: AX=5FB4h,INT 21/AH=60h
--------N-215FB4-----------------------------
INT 21 - LANtastic v3+ - CREATE INDIRECT FILE
        AX = 5FB4h
        DS:SI -> 128-byte buffer containing ASCIZ contents of indirect file
        ES:DI -> full ASCIZ path of indirect file to create, incl machine name
Return: CF clear if successful
        CF set on error
            AX = error code
Note:   the contents of the indirect file may be any valid server-relative path
SeeAlso: AX=5FB3h,AX=5FB5h
--------N-215FB5-----------------------------
INT 21 - LANtastic v3+ - GET INDIRECT FILE CONTENTS
        AX = 5FB5h
        DS:SI -> 128-byte buffer for ASCIZ indirect file contents
        ES:DI -> full ASCIZ path of indirect file
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AX=5FB4h
--------N-215FB6-----------------------------
INT 21 - LANtastic v4.1+ - SET AUTO-LOGIN DEFAULTS
        AX = 5FB6h
        ES:DI -> pointer to ASCIZ default user name, immediately followed by
                ASCIZ password
        BL = adapter number to use for default login attempt
            FFh try all valid adapters
            00h-05h try adapter 0-5 explicitly
Return: CF clear if successful
        CF set on error
            AX = error code
Notes:  call with ES:DI -> two nulls to disable auto-login
SeeAlso: AX=5FB7h
--------N-215FB7-----------------------------
INT 21 - LANtastic v4.1+ - GET AUTO-LOGIN DEFAULTS
        AX = 5FB7h
        ES:DI -> pointer to 16-byte buffer to store ASCIZ auto-login user name
Return: CF clear if successful
            DL = adapter number used for default login attempt
                FFh all valid adapters will be tried
                00h-05h specified adapter will be tried explicitly
        CF set on error
            AX = error code
SeeAlso: AX=5F81h,AX=5FB6h
--------N-215FC0-----------------------------
INT 21 - LANtastic - GET TIME FROM SERVER
        AX = 5FC0h
        DS:SI -> time block (see #01743)
        ES:DI -> ASCIZ server name to get time from
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AH=E7h"Novell"

Format of LANtastic time block:
Offset  Size    Description     (Table 01743)
 00h    WORD    year
 02h    BYTE    day
 03h    BYTE    month
 04h    BYTE    minutes
 05h    BYTE    hour
 06h    BYTE    hundredths of second
 07h    BYTE    second
--------N-215FC8-----------------------------
INT 21 - LANtastic v4.0+ - SCHEDULE SERVER SHUTDOWN
        AX = 5FC8h
        ES:DI -> ASCIZ server name in form "\\machine"
        DS:SI -> ASCIZ reason string (80 characters)
        CX = number of minutes until shutdown (0 = immediate)
        DX = option flags (see #01744)
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AX=5FC9h

Bitfields for LANtastic option flags:
Bit(s)  Description     (Table 01744)
 0      auto reboot
 1      do not notify users
 2      halt after shutdown
 3      shutdown due to power fail (used by UPS)
 4-7    reserved
 8-14   user definable
 15     reserved
--------N-215FC9-----------------------------
INT 21 - LANtastic v4.0+ - CANCEL SERVER SHUTDOWN
        AX = 5FC9h
        ES:DI -> ASCIZ server name in form "\\machine"
Return: CF clear if successful
        CF set on error
            AX = error code
Note:   you must have the "S" privilege to use this call
SeeAlso: AX=5FC8h
--------N-215FCA-----------------------------
INT 21 - LANtastic v4.0+ - STUFF SERVER KEYBOARD BUFFER
        AX = 5FCAh
        ES:DI -> ASCIZ server name in form "\\machine"
        DS:SI -> ASCIZ string to stuff (128 bytes)
Return: CF clear if successful
        CF set on error
            AX = error code
Note:   you must have the "S" privilege to use this call
        maximum number of characters that can be stuffed is determined by the
          server's RUN BUFFER SIZE.
SeeAlso: INT 16/AH=05h
--------N-215FCB-----------------------------
INT 21 - LANtastic v4.1+ - TERMINATE USER
        AX = 5FCBh
        ES:DI -> ASCIZ server name in form "\\machine"
        DS:SI -> blank-padded username.  A null char = wildcard.
        DS:DX -> blank-padded machine name.  A null char = wildcard.
        CX = minutes until termination (0 = immediate)
Return: CF clear if successful
        CF set on error
            AX = error code
Note:   you must have the "S" privilege to use this call
        you cannot log yourself out using this call
SeeAlso: AX=5F82h
--------N-215FCC-----------------------------
INT 21 - LANtastic v4.1+ - GET/SET SERVER CONTROL BITS
        AX = 5FCCh
        ES:DI -> ASCIZ server name in form "\\machine"
        CX = bit values (value of bits you want to set) (see #01745)
        DX = bit mask (bits you are interested in, 0 = get only) (see #01745)
Return: CF clear if successful
            CX = control bits after call (see #01745)
        CF set on error
            AX = error code
Note:   you must have the "S" privilege to SET, anyone can GET.

Bitfields for control bits:
Bit(s)  Description     (Table 01745)
 0      disable logins
--------N-215FCD-----------------------------
INT 21 - LANtastic v4.1+ - FLUSH SERVER CACHES
        AX = 5FCDh
        ES:DI -> ASCIZ server name in form "\\machine"
Return: CF clear if successful
        CF set on error
            AX = error code
Note:   you must have the "S" privilege to use this call.
--------N-215FD0-----------------------------
INT 21 - LANtastic - GET REDIRECTED PRINTER TIMEOUT
        AX = 5FD0h
Return: CF clear if successful
            CX = redirected printer timeout in clock ticks of 55ms
                0000h if timeout disabled
        CF set on error
            AX = error code
SeeAlso: AX=5FD1h
--------N-215FD1-----------------------------
INT 21 - LANtastic - SET REDIRECTED PRINTER TIMEOUT
        AX = 5FD1h
        CX = printer timeout in clock ticks of 55ms, 0000h to disable timeouts
Return: CF clear if successful
        CF set on error
            AX = error code
SeeAlso: AX=5FD0h
--------N-215FE0-----------------------------
INT 21 C - LANtastic - GET DOS SERVICE VECTOR
        AX = 5FE0h
Return: CF clear if successful
            ES:BX -> current FAR service routine
        CF set on error
            AX = error code
Note:   the service routine is called by the LANtastic redirector whenever DOS
          may safely be called, permitting external TSRs and drivers to hook
          into LANtastic's DOS busy flag checking
SeeAlso: AX=5FE1h,INT 28,INT 2A/AH=84h
--------N-215FE1-----------------------------
INT 21 - LANtastic - SET DOS SERVICE VECTOR
        AX = 5FE1h
        ES:BX -> FAR routine to call when DOS services are available
Return: CF clear if successful
        CF set on error
            AX = error code
Note:   new handler must chain to previous handler as its first action
SeeAlso: AX=5FE0h
--------N-215FE2-----------------------------
INT 21 - LANtastic - GET MESSAGE SERVICE VECTOR
        AX = 5FE2h
Return: CF clear if successful
            ES:BX -> current FAR message service routine
        CF set on error
            AX = error code
SeeAlso: AX=5FE0h,AX=5FE3h
--------N-215FE3-----------------------------
INT 21 - LANtastic - SET MESSAGE SERVICE VECTOR
        AX = 5FE3h
        ES:BX -> FAR routine for processing network messages
Return: CF clear if successful
        CF set on error
            AX = error code
Notes:  handler must chain to previous handler as its first action
        on invocation, ES:BX -> just-received message
SeeAlso: AX=5FE2h
--------D-2160-------------------------------
INT 21 - DOS 3.0+ - "TRUENAME" - CANONICALIZE FILENAME OR PATH
        AH = 60h
        DS:SI -> ASCIZ filename or path
        ES:DI -> 128-byte buffer for canonicalized name
Return: CF set on error
            AX = error code
                02h invalid component in directory path or drive letter only
                03h malformed path or invalid drive letter
            ES:DI buffer unchanged
        CF clear if successful
            AH = 00h or 3Ah (DOS 6.1/6.2 for character device)
            AL = destroyed (00h or 2Fh or 5Ch or last character of current
                  directory on drive)
            buffer filled with qualified name of form D:\PATH\FILE.EXT or
              \\MACHINE\PATH\FILE.EXT
Desc:   determine the canonical name of the specified filename or path,
          corresponding to the undocumented TRUENAME command in COMMAND.COM
Notes:  the input path need not actually exist
        letters are uppercased, forward slashes converted to backslashes,
          asterisks converted to appropriate number of question marks, and
          file and directory names are truncated to 8.3 if necessary.  (DR DOS
          3.41 and 5.0 do not expand asterisks)
        '.' and '..' in the path are resolved
        filespecs on local drives always start with "d:", those on network
          drives always start with "\\"
        if path string is on a JOINed drive, the returned name is the one that
          would be needed if the drive were not JOINed; similarly for a
          SUBSTed, ASSIGNed, or network drive letter.   Because of this, it is
          possible to get a qualified name that is not legal under the current
          combination of SUBSTs, ASSIGNs, JOINs, and network redirections
        under DOS 3.3 through 6.00, a device name is translated differently if
          the device name does not have an explicit directory or the directory
          is \DEV (relative directory DEV from the root directory works
          correctly).  In these cases, the returned string consists of the
          unchanged device name and extension appended to the string X:/
          (forward slash instead of backward slash as in all other cases) where
          X is the default or explicit drive letter.
        under MS-DOS 7.0, this call returns the short name for any
          long-filename portions of the provided pathname or filename
        functions which take pathnames require canonical paths if invoked via
          INT 21/AX=5D00h
        supported by OS/2 v1.1 compatibility box
        NetWare 2.1x does not support characters with the high bit set; early
          versions of NetWare 386 support such characters except in this call.
          In addition, NetWare returns error code 3 for the path "X:\"; one
          should use "X:\." instead.
        Novell DOS 7 reportedly has difficulty with non-MS-DOS filenames on
          network drives, and can return "D:" instead of "SERVER/VOLUME"
        for DOS 3.3-6.0, the input and output buffers may be the same, as the
          canonicalized name is built in an internal buffer and copied to the
          specified output buffer as the very last step
        for DR DOS 6.0, this function is not automatically called when on a
          network.  Device drivers reportedly cannot make this call from their
          INIT function.  Using the same pointer for both input and output
          buffers is not supported in the April 1992 and earlier versions of
          DR DOS
        Windows for Workgroups 3.11, Windows95 and even MS-DOS 7.00 only
          return the local drive path; to obtain network paths use
          INT 21/AX=5F02h or INT 21/AX=5F46h instead
        Corel's CORELCDX and MSCDEX without the /S switch return canonical
          names of the form "\\D.\A.\path", where "D" is the CD-ROM drive
          letter and "A" appears to indicate the first physical CD-ROM drive;
          MSCDEX with the /S switch returns a canonical name with embedded
          blanks.  Novell DOS 7 NWCDEX as of the 11/16/94 update returns the
          same canonical path as MSCDEX; earlier revisions returned
          "Cdex.   D:\path", where "D" is the CD-ROM drive letter
        the Windows95 MSCDEX-replacement VxD returns "D:\path", even though the
          MS-DOS 7.00 MSCDEX behaves identically to older versions (above)
BUG:    Windows95 incorrectly treats filenames where the first two characters
          after the drive letter and colon are both slashes (either forward
          or backward) as a UNC (network name) and requires several seconds
          to attempt to resolve the name before returning an unchanged
          string
SeeAlso: AX=5F02h,AX=5FB3h,AX=7160h/CL=00h,INT 2F/AX=1123h,INT 2F/AX=1221h
--------D-2161-------------------------------
INT 21 - DOS 3.0+ - UNUSED (RESERVED FOR NETWORK USE)
        AH = 61h
Return: AL = 00h
Note:   this function does nothing and returns immediately
--------O-2161--BP6467-----------------------
INT 21 U - OS/2 v1.x FAPI - OS/2 FILE SYSTEM JOIN/SUBST
        AH = 61h
        BP = 6467h ("dg")
        AL = function
            00h list (i.e. get)
            01h add
            02h delete
        BX = drive number
        CX = size of buffer
        SI = type (0002h JOIN, 0003h SUBST)
        ES:DI -> buffer
Return: CF clear if successful
            AX = 0000h
            ES:DI buffer filled, if appropriate
        CF set on error
            AX = error code
Notes:  used by JOIN and SUBST to communicate with the OS/2 file system
        for function 00h (list), the ES:DI buffer is filled with the ASCIZ
          JOIN/SUBST path or an empty string if the drive is not JOINed/SUBSTed
        also supported by OS/2 v2.0+ Virtual DOS Machines
--------D-2162-------------------------------
INT 21 - DOS 3.0+ - GET CURRENT PSP ADDRESS
        AH = 62h
Return: BX = segment of PSP for current process
Notes:  this function does not use any of the DOS-internal stacks and may
          thus be called at any time, even during another INT 21h call
        the current PSP is not necessarily the caller's PSP
        identical to the undocumented AH=51h
SeeAlso: AH=50h,AH=51h
--------U-216262SI1994-----------------------
INT 21 - ENVLOCK - INSTALLATION CHECK
        AX = 6262h
        SI = 1994h
Return: AX = 1994h if installed
            ES = ENVLOCK's resident segment
Notes:  to deactivate ENVLOCK, zero out the byte at ES:[0102h]
Program: ENVLOCK is a TSR by Alexander Yanovsky (aka PC Hawk) that forces
          other TSRs to deallocate their environment when they stay resident
--------D-216300-----------------------------
INT 21 - DOS 2.25 only - GET LEAD BYTE TABLE ADDRESS
        AX = 6300h
Return: CF clear if successful
            DS:SI -> lead byte table (see #01746)
        CF set on error
            AX = error code (01h) (see #01680 at AH=59h/BX=0000h)
Notes:  does not preserve any registers other than SS:SP
        the US version of MS-DOS 3.30 treats this as an unused function,
          setting AL=00h and returning immediately
SeeAlso: AX=6301h,AH=07h,AH=08h,AH=0Bh

Format of double-byte character set lead byte table entry:
Offset  Size    Description     (Table 01746)
 00h  2 BYTEs   low/high ends of a range of leading byte of double-byte chars
 02h  2 BYTEs   low/high ends of a range of leading byte of double-byte chars
        ...
  N   2 BYTEs   00h,00h end flag
--------D-216300-----------------------------
INT 21 - DOS 3.2+ - GET DOUBLE BYTE CHARACTER SET LEAD-BYTE TABLE
        AX = 6300h
Return: AL = error code
            00h successful
                DS:SI -> DBCS table (see #01746)
                all other registers except CS:IP and SS:SP destroyed
            FFh not supported
Notes:  probably identical to AH=63h/AL=00h for DOS 2.25
        the US version of MS-DOS 3.30 treats this as an unused function,
          setting AL=00h and returning immediately, WITHOUT setting DS:SI;
          only the Far East versions of MS-DOS 3.2 and 3.3 supported this call
        the US version of DOS 4.0+ accepts this function, but returns an empty
          list
        IBM DOS 6.1 SYS.COM assumes that CF is set on error
SeeAlso: AX=6300h"DOS 2.25"
--------D-216301-----------------------------
INT 21 - DOS 2.25, DOS 3.2+ - SET KOREAN (HANGEUL) INPUT MODE
        AX = 6301h
        DL = new mode
            00h return only full characters on DOS keyboard input functions
            01h return partially-formed (interim) characters also
Return: AL = status
            00h successful
            FFh invalid mode
Notes:  Novell DOS 7 simply stores DL in the caller's PSP (see #01378 at AH=26h)
        the US version of MS-DOS 3.30 treats this as an unused function,
          setting AL=00h and returning immediately; only the Far East versions
          of MS-DOS 3.2 and 3.3 supported this call
SeeAlso: AH=07h,AH=08h,AH=0Bh,AX=6300h,AX=6302h
--------D-216302-----------------------------
INT 21 - DOS 2.25, DOS 3.2+ - GET KOREAN (HANGEUL) INPUT MODE
        AX = 6302h
Return: AL = status
            00h successful
                DL = current input mode
                    00h return only full characters (clears interim flag)
                    01h return partial characters (sets interim flag)
            FFh not supported
Notes:  Novell DOS 7 simply reads the value out of the caller's PSP, so it
          can return values other than 00h or 01h if the last call to AX=6301h
          used another value
        the US version of MS-DOS 3.30 treats this as an unused function,
          setting AL=00h and returning immediately, WITHOUT setting DL; only
          the Far East versions of MS-DOS 3.2 and 3.3 supported this call
SeeAlso: AH=07h,AH=08h,AH=0Bh,AX=6300h,AX=6301h
--------v-216303------------------------
INT 21 - VIRUS - "DOS IDLE" - INSTALLATION CHECK
        AX = 6303h
Return: BX = 6303h if resident
SeeAlso: AX=5643h"VIRUS",AX=6304h"VIRUS",AX=9AD5h"VIRUS"
--------v-216304------------------------
INT 21 - VIRUS - "Replicator" - INSTALLATION CHECK
        AX = 6304h
Return: BX = 6304h if resident
SeeAlso: AX=6303h"VIRUS",AX=6969h"VIRUS"
--------D-2164-------------------------------
INT 21 - DOS 3.2+ internal - SET DEVICE DRIVER LOOKAHEAD FLAG
        AH = 64h
        AL = flag
                00h (default) call device driver function 5 (non-dest read)
                        before INT 21/AH=01h,08h,0Ah
            nonzero don't call driver function 5
Return: nothing (MS-DOS)
        CF set, AX=error code??? (DR DOS 5.0, which does not support this call)
Notes:  this function is called by the DOS 3.3+ PRINT.COM
        under MS-DOS, this function does not use any of the DOS-internal stacks
          and may thus be called at any time, even during another DOS call
SeeAlso: AH=01h,AH=08h,AH=0Ah,AX=5D06h
--------O-2164--DX0000-----------------------
INT 21 U - OS/2 v2.0+ Virtual DOS Machine - ENABLE AUTOMATIC TITLE SWITCH
        AH = 64h
        DX = 0000h (function number)
        CX = 636Ch (magic value, "cl")
        BX = 0000h (indicates special request)
Note:   if CX is not 636Ch on entry, INT 21/AH=6Ch is invoked, because a bug
          in OS/2 1.x FAPI erroneously called AH=64h instead of AH=6Ch
SeeAlso: AH=64h/DX=0001h,INT 21/AH=4Bh
--------O-2164--DX0001-----------------------
INT 21 U - OS/2 v2.0+ Virtual DOS Machine - SET SESSION TITLE
        AH = 64h
        DX = 0001h (function number)
        CX = 636Ch (magic value, "cl")
        BX = 0000h (indicates special request)
        ES:DI -> new ASCIZ title (max 12 char) or "" to restore default title
Note:   if CX is not 636Ch on entry, INT 21/AH=6Ch is invoked, because a bug
          in OS/2 1.x FAPI erroneously called AH=64h instead of AH=6Ch
SeeAlso: AH=64h/DX=0000h,AH=64h/DX=0002h,INT 15/AH=12h/BH=05h
--------O-2164--DX0002-----------------------
INT 21 U - OS/2 v2.0+ Virtual DOS Machine - GET SESSION TITLE
        AH = 64h
        DX = 0002h (function number)
        CX = 636Ch (magic value, "cl")
        BX = 0000h (indicates special request)
        ES:DI -> 13-byte buffer for current title
Return: buffer filled (single 00h if title never changed)
Note:   if CX is not 636Ch on entry, INT 21/AH=6Ch is invoked, because a bug
          in OS/2 1.x FAPI erroneously called AH=64h instead of AH=6Ch
SeeAlso: AH=64h/DX=0000h,AH=64h/DX=0001h,INT 15/AH=12h/BH=05h
--------O-2164--DX0003-----------------------
INT 21 U - OS/2 v2.1 Virtual DOS Machine - GET LASTDRIVE
        AH = 64h
        DX = 0003h (function number)
        CX = 636Ch (magic value, "cl")
        BX = 0000h (indicates special request)
Return: AL = highest drive supported
Notes:  if CX is not 636Ch on entry, INT 21/AH=6Ch is invoked, because a bug
          in OS/2 1.x FAPI erroneously called AH=64h instead of AH=6Ch
        used by WinOS2
        not supported by OS/2 Warp 3.0, check list of lists instead (see #01627)
SeeAlso: AH=52h
--------O-2164--DX0004-----------------------
INT 21 U - OS/2 v2.1+ Virtual DOS Machine - GET SIZE OF PTDA JFT
        AH = 64h
        DX = 0004h (function number)
        CX = 636Ch (magic value, "cl")
        BX = 0000h (indicates special request)
Return: AX = number of entries in OS/2 JFT for VDM
Notes:  if CX is not 636Ch on entry, INT 21/AH=6Ch is invoked, because a bug
          in OS/2 1.x FAPI erroneously called AH=64h instead of AH=6Ch
        in an OS/2 VDM, the DOS Job File Table in the PSP contains an index
          into the OS/2 JFT in the Per-Task Data Area rather than an SFT index
          because the OS/2 SFT can contain more than 255 entries
--------O-2164--DX0005-----------------------
INT 21 U - OS/2 v2.1+ Virtual DOS Machine - GET SECOND SFT FLAGS WORD
        AH = 64h
        DX = 0005h (function number)
        CX = 636Ch (magic value, "cl")
        BX = 0000h (indicates special request)
        DI = DOS file handle
Return: AX = value of second flags word from OS/2 SFT entry for file
Notes:  if CX is not 636Ch on entry, INT 21/AH=6Ch is invoked, because a bug
          in OS/2 1.x FAPI erroneously called AH=64h instead of AH=6Ch
        the OS/2 SFT has two flags words rather than DOS's one word, and this
          function provides access to the word which is not present in DOS
--------O-2164--DX0006-----------------------
INT 21 U - OS/2 v2.1+ Virtual DOS Machine - UNLOAD DOSKRNL SYMBOLS & LOAD PROGR
        AH = 64h
        DX = 0006h (function number)
        CX = 636Ch (magic value, "cl")
        BX = 0000h (indicates special request)
        ES:DI -> ASCIZ filespec
        DS = base address for loading
Notes:  if CX is not 636Ch on entry, INT 21/AH=6Ch is invoked, because a bug
          in OS/2 1.x FAPI erroneously called AH=64h instead of AH=6Ch
        this function is only supported by the kernel debugging version of
          OS2KRNL
--------O-2164--DX0007-----------------------
INT 21 U - OS/2 v2.1+ Virtual DOS Machine - GET WinOS2 CALL GATE ADDRESS
        AH = 64h
        DX = 0007h (function number)
        CX = 636Ch (magic value, "cl")
        BX = 0000h (indicates special request)
Return: AX = call gate address
Notes:  if CX is not 636Ch on entry, INT 21/AH=6Ch is invoked, because a bug
          in OS/2 1.x FAPI erroneously called AH=64h instead of AH=6Ch
        used by WinOS2 to make direct calls to OS2KRNL, bypassing the overhead
          of DOSKRNL
--------O-2164--DX0008-----------------------
INT 21 U - OS/2 v2.1+ Virtual DOS Machine - GET LOADING MESSAGE
        AH = 64h
        DX = 0008h (function number)
        CX = 636Ch (magic value, "cl")
        BX = 0000h (indicates special request)
Return: DS:DX -> '$'-terminated message "Loading.  Please wait."
Notes:  if CX is not 636Ch on entry, INT 21/AH=6Ch is invoked, because a bug
          in OS/2 1.x FAPI erroneously called AH=64h instead of AH=6Ch
        this function permits National Language Support for the initial message
          displayed while WinOS2 starts a full-screen session
--------O-2164--CX636C-----------------------
INT 21 U - OS/2 v2.1+ Virtual DOS Machine - OS/2 API support
        AH = 64h
        CX = 636Ch ("cl")
        BX = API ordinal (see #01747)
        other registers as appropriate for API call
Return: as appropriate for API call
SeeAlso: AH=64h/BX=0025h,AH=64h/BX=00B6h,AH=64h/BX=00CBh

(Table 01747)
Values for OS/2 API ordinal:
 0025h  DOS32StartSession
 0082h  DosGetCP
 00B6h  DosQFSAttach
 00BFh  DosEditName
 00CBh  DosForceDelete
 0144h  Dos32CreateEventSem
 0145h  Dos32OpenEvenSem
 0146h  Dos32CloseEventSem
 0147h  Dos32ResetEventSem
 0148h  Dos32PostEventSem
 0149h  Dos32WaitEventSem
 014Ah  Dos32QueryEventSem
 014Bh  Dos32CreateMutexSem
 014Ch  Dos32OpenMutexSem
 014Dh  Dos32CloseMutexSem
 014Eh  Dos32RequestMutexSem
 014Fh  Dos32ReleaseMutexSem
 0150h  Dos32QueryMutexSem
 0151h  Dos32CreateMuxWaitSem
 0152h  Dos32OpenMuxWaitSem
 0153h  Dos32CloseMuxWaitSem
 0154h  Dos32WaitMuxWaitSem
 0155h  Dos32AddMuxWaitSem
 0156h  Dos32DeleteMuxWaitSem
 0157h  Dos32QueryMuxWaitSem
--------O-2164--BX0025-----------------------
INT 21 U - OS/2 v2.1+ Virtual DOS Machine - OS/2 API DOS32StartSession
        AH = 64h
        BX = 0025h (API ordinal)
        CX = 636Ch ("cl")
        DS:SI -> STARTDATA structure (see #01748)
Return: AX = return code
SeeAlso: AH=64h/CX=636Ch,AH=64h/BX=00B6h

Format of OS/2 Virtual DOS Machine STARTDATA structure:
Offset  Size    Description     (Table 01748)
 00h    WORD    length of structure (must be 0018h,001Eh,0020h,0032h,or 003Ch)
 02h    WORD    relation of new process to caller (00h independent, 01h child)
 04h    WORD    fore/background (00h foreground, 01h background)
 06h    WORD    trace options (00h-02h, 00h = no trace)
 08h    DWORD   pointer to ASCIZ program title (max 62 chars) or 0000h:0000h
 0Ch    DWORD   pointer to ASCIZ program name (max 128 chars) or 0000h:0000h
 10h    DWORD   pointer to ASCIZ program args (max 144 chars) or 0000h:0000h
 14h    DWORD   "TermQ" (currently reserved, must be 00000000h)
 18h    DWORD   pointer to environment (max 486 bytes) or 0000h:0000h
 1Ch    WORD    inheritance (00h or 01h)
 1Eh    WORD    session type
                00h OS/2 session manager determines type (default)
                01h OS/2 full-screen
                02h OS/2 window
                03h PM
                04h VDM full-screen
                07h VDM window
 20h    DWORD   pointer to ASCIZ icon filename (max 128 chars) or 0000h:0000h
 24h    DWORD   "PgmHandle" (currently reserved, must be 00000000h)
 28h    WORD    "PgmControl"
 2Ah    WORD    initial column
 2Ch    WORD    initial row
 2Eh    WORD    initial width
 30h    WORD    initial height
 32h    WORD    reserved (0)
 34h    DWORD   "ObjectBuffer" (currently reserved, must be 00000000h)
 38h    DWORD   "ObjectBufferLen" (currently reserved, must be 00000000h)
--------O-2164--BX00B6-----------------------
INT 21 U - OS/2 v2.1+ Virtual DOS Machine - OS/2 API DosQFSAttach
        AH = 64h
        BX = 00B6h (API ordinal)
        CX = 636Ch (magic value "cl")
        DS = user's data segment
        ES:DI -> FSQAttachStruc (see #01749)
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            AX = 0000h
            data buffer filled
SeeAlso: AH=64h/CX=636Ch

Format of OS/2 Virtual DOS Machine FSQAttachStruc:
Offset  Size    Description     (Table 01749)
 00h    DWORD   reserved
 04h    DWORD   pointer to the offset of the data buffer length
 08h    DWORD   pointer to the offset of the data buffer
 0Ch    WORD    FSA Info level
 0Eh    WORD    ordinal index into table
 10h    DWORD   pointer to the offset of the device name
Notes:  The segment value of the buffer, buffer length, and device
          name MUST all be the same.  It is defined on entry in the DS
          register.  The details of each info level are defined in the
          OS/2 CP Reference.
--------O-2164--BX00CB-----------------------
INT 21 U - OS/2 v2.1+ Virtual DOS Machine - OS/2 API DosForceDelete
        AH = 64h
        BX = 00CBh (API ordinal)
        CX = 636Ch (magic value "cl")
        DS:DX -> ASCIZ filename
Return: CF clear if successful
            AX destroyed
        CF set on error
            AX = error code (02h,03h,05h) (see #01680 at AH=59h/BX=0000h)
Desc:   delete a file without saving it to the undelete directory
SeeAlso: AH=41h,AH=64h/CX=636Ch
----------216500-----------------------------
INT 21 - Windows95 (OSR2) - SET GENERAL INTERNATIONALIZATION INFO
        AX = 6500h
        ES:DI -> buffer containing internationalization info (see #01750)
        CX = size of buffer (>= 7)
Return: CF clear if successful
            AX = system code page
            CX = number of bytes copied from supplied buffer
        CF set on error
            AX = error code
Note:   this function will not overwrite the country or code-page numbers,
          but can be used to modify all other data about the country and
          code page
SeeAlso: AH=65h"GET EXTENDED",AH=70h
--------D-2165-------------------------------
INT 21 - DOS 3.3+ - GET EXTENDED COUNTRY INFORMATION
        AH = 65h
        AL = info ID
            01h get general internationalization info (see also AX=6500h)
            02h get pointer to uppercase table
            03h (DOS 6.2+ COUNTRY.SYS) get pointer to lowercase table
            04h get pointer to filename uppercase table
            05h get pointer to filename terminator table
            06h get pointer to collating sequence table
            07h (DOS 4.0+) get pointer to Double-Byte Character Set table
        BX = code page (FFFFh=global code page) (see #01757)
        DX = country ID (FFFFh=current country)
        ES:DI -> country information buffer (see #01750)
        CX = size of buffer (>= 5)
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            CX = size of country information returned
            ES:DI -> country information (see #01750)
Notes:  AL=05h appears to return same info for all countries and codepages; it
          has been documented for DOS 5+, but was undocumented in earlier
          versions
        NLSFUNC must be installed to get info for countries other than the
          default
        subfunctions 02h and 04h are identical under OS/2
        subfunction 03h apparently supports only codepage 866 in DOS 6.2x
SeeAlso: AH=38h,AH=70h"MS-DOS 7",INT 2F/AX=1401h,INT 2F/AX=1402h
SeeAlso: INT 2F/AX=14FEh

Format of country information:
Offset  Size    Description     (Table 01750)
 00h    BYTE    info ID
---if info ID = 01h---
 01h    WORD    size of following info in bytes
 03h    WORD    country ID (see #01400 at AH=38h)
 05h    WORD    code page (see #01757)
 07h 34 BYTEs   country-dependent info (see #01399 at AH=38h)
---if info ID = 02h---
 01h    DWORD   pointer to uppercase table (see #01751)
---if info ID = 03h---
 01h    DWORD   pointer to lowercase table (see #01752)
---if info ID = 04h---
 01h    DWORD   pointer to filename uppercase table (see #01753)
---if info ID = 05h---
 01h    DWORD   pointer to filename character table (see #01754)
---if info ID = 06h---
 01h    DWORD   pointer to collating table (see #01755)
---if info ID = 07h (DOS 4.0+)---
 01h    DWORD   pointer to DBCS lead byte table (see #01756)
SeeAlso: #01775

Format of uppercase table:
Offset  Size    Description     (Table 01751)
 00h    WORD    table size (0080h)
 02h 128 BYTEs  uppercase equivalents (if any) of chars 80h to FFh
SeeAlso: #01750,#01753

Format of lowercase table:
Offset  Size    Description     (Table 01752)
 00h    WORD    table size (0100h)
 02h 256 BYTEs  lowercase equivalents (if any) of chars 00h to FFh
SeeAlso: #01750,#01753

Format of filename uppercase table:
Offset  Size    Description     (Table 01753)
 00h    WORD    table size (0080h)
 02h 128 BYTEs  uppercase equivalents (if any) of chars 80h to FFh
SeeAlso: #01750,#01751

Format of filename terminator table:
Offset  Size    Description     (Table 01754)
 00h    WORD    table size (not counting this word)
 02h    BYTE    ??? (01h for MS-DOS 3.30-6.00)
 03h    BYTE    lowest permissible character value for filename
 04h    BYTE    highest permissible character value for filename
 05h    BYTE    ??? (00h for MS-DOS 3.30-6.00)
 06h    BYTE    first excluded character in range \ all characters in this
 07h    BYTE    last excluded character in range  / range are illegal
 08h    BYTE    ??? (02h for MS-DOS 3.30-6.00)
 09h    BYTE    number of illegal (terminator) characters
 0Ah  N BYTEs   characters which terminate a filename:  ."/\[]:|<>+=;,
Note:   partially documented for DOS 5+, but undocumented for earlier versions
SeeAlso: #01750

Format of collating table:
Offset  Size    Description     (Table 01755)
 00h    WORD    table size (0100h)
 02h 256 BYTEs  values used to sort characters 00h to FFh
SeeAlso: #01750

Format of DBCS lead byte table:
Offset  Size    Description     (Table 01756)
 00h    WORD    length of table in ranges
 02h 2N BYTEs   start/end for N lead byte ranges
        WORD    0000h   (end of table)
SeeAlso: #01750
--------D-2165-------------------------------
INT 21 - DOS 4.0+ - COUNTRY-DEPENDENT CHARACTER CAPITALIZATION
        AH = 65h
        AL = function
            20h capitalize character
                DL = character to capitalize
                Return: DL = capitalized character
            21h capitalize string
                DS:DX -> string to capitalize
                CX = length of string
            22h capitalize ASCIZ string
                DS:DX -> ASCIZ string to capitalize
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
Note:   these calls have been documented for DOS 5+, but were undocumented in
          DOS 4.x.
BUG:    Novell DOS 7 Update 15 crashes on AX=6521h when CX=0000h
--------D-216523-----------------------------
INT 21 U - DOS 4.0+ - DETERMINE IF CHARACTER REPRESENTS YES/NO RESPONSE
        AX = 6523h
        DL = character
        DH = second character of double-byte character (if applicable)
Return: CF set on error
        CF clear if successful
            AX = type
                00h no
                01h yes
                02h neither yes nor no
Note:   supported by Novell DOS 7, though prior to Update 14, the results
          depended on the kernel variant rather than the YESCHAR= or COUNTRY=
          setting in CONFIG.SYS
BUG:    Novell DOS commands and tools all use internal settings rather than
          this function, so the Yes/No responses are dependent on the specific
          country's variant being run rather than on the COUNTRY= setting
--------D-2165-------------------------------
INT 21 U - DOS 4.0+ internal - COUNTRY-DEPENDENT FILENAME CAPITALIZATION
        AH = 65h
        AL = function
            A0h capitalize filename character
                DL = character to capitalize
                Return: DL = capitalized character
            A1h capitalize counted filename string
                DS:DX -> filename string to capitalize
                CX = length of string
            A2h capitalize ASCIZ filename
                DS:DX -> ASCIZ filename to capitalize
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
Note:   nonfunctional in MS-DOS 4.00 through 6.00 due to a bug (the code sets a
          pointer depending on the high bit of AL, but doesn't clear the
          bit before branching by function number).  Supported and
          functional(!) in Novell DOS 7 (Update 15)
--------D-216601-----------------------------
INT 21 - DOS 3.3+ - GET GLOBAL CODE PAGE TABLE
        AX = 6601h
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            BX = active code page (see #01757)
            DX = system code page (see #01757)
SeeAlso: AX=6602h
--------D-216602-----------------------------
INT 21 - DOS 3.3+ - SET GLOBAL CODE PAGE TABLE
        AX = 6602h
        BX = active code page (see #01757)
        DX = system code page (active page at boot time)
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            AX = EB41h (Novell NWDOS v7.0 when NLSFUNC not installed and
                  request was for previously-active code page)
SeeAlso: AX=6601h,INT 2F/AX=14FFh

(Table 01757)
Values for code page:
 0      Reduced 7-bit ASCII                     [NetWare]
 37     EBCDIC: US/Canada English (CECP)        [Windows NT 3.51+]
 38     EBCDIC: International (old)
 111    Greek
 112    Turkish
 113    Yugoslavian
 161    Arabic                                  [Linux]
 162    Arabic                                  [Linux]
 163    Arabic                                  [Linux]
 164    Arabic                                  [Linux]
 165    Arabic                                  [Linux]
 237    EBCDIC: Germany (CECP)
 273    EBCDIC: ??? (CECP)
 274    EBCDIC: Belgium
 275    EBCDIC: Brazilian
 277    EBCDIC: Danish/Norwegian (CECP)
 278    EBCDIC: Finnish/Swedish (CECP)
 280    EBCDIC: Italian (CECP)
 281    EBCDIC: Japanese-E
 284    EBCDIC: Latin-American/Spanish (CECP)
 285    EBCDIC: UK English (CECP)
 290    EBCDIC: Japanese Kana
 297    EBCDIC: French (CECP)
 367    US-ASCII (ISO 646-US, 7-bit)
 420    EBCDIC: Arabic 1
 423    EBCDIC: Greek
 424    EBCDIC: Hebrew
 437    US / English / PC-8 / IBM-2
 500    EBCDIC: Belgium/Switzerland (CECP)
 500    EBCDIC: International
 646    (??? reserved for ISO 646 7-bit codepages)
 667    Eastern Europe (Polish)
 668    Eastern Europe (Slavic)
 708    Arabic/Middle East
 737    Greek (2)
 775    Baltic / Baltic Rim
 819    Latin-1 (ISO 8859-1)
 850    Multilingual (Latin-1)
 851    Greek
 852    Slavic/Easter Europe (Latin-2)          [DOS 5+]
 853    Turkish (Latin-2)
 854    Spanish
 855    Cyrilic (1)
 857    Turkish
 860    Portugese
 861    Icelandic
 862    Hebrew
 863    French Canadian
 864    Arabic/Middle East
 865    Nordic (Norwegian/Danish)
 866    Russian (Cyrillic 2)
 867    Czech
 868    Arabic
 869    Greek (1)
 870    EBCDIC: Yugoslavia (Roece)
 871    EBCDIC: Icelandic
 874    Thailand
 875    EBCDIC: Greek
 880    Russian (Cyrillic GOST)
 880    EBCDIC: Cyrillic
 881    Latin 1 (ISO 8859-1)
 882    Latin 2 (ISO 8859-2)
 883    Latin 3 (ISO 8859-3)
 884    Latin 4 (ISO 8859-4)
 885    Latin 5 (ISO 8859-5)
 891    unknown
 897    Japanese (Shift-JIS)
 903    unknown
 904    unknown
 905    EBCDIC: Turkish
 912    Latin 2 (ISO 8859-2: Eastern Europe)
 913    (??? reserved for Latin 3)
 914    (??? reserved for Latin 4)
 915    Cyrillic (ISO 8859-5: Latin/Cyrillic)
 916    (??? reserved for ISO 8859-6: Latin/Arabic)
 917    (??? reserved for ISO 8859-7: Latin/Greek)
 918    EBCDIC: Arabic 2
 919    (??? reserved for ISO 8859-9: Latin 5)
 920    (??? reserved for ISO 8859-10: Latin 6/Sami)
 932    DBCS: Japanese (Shift-JIS)
 934    DBCS: Korean
 936    DBCS: Chinese (PRC/ROC, Simplified/xGB)
 938    DBCS: Taiwan
 938    DBCS: Chinese (PRC/ROC)
 942    DBCS: Japanese SAA
 944    DBCS: Korean SAA
 948    DBCS: Chinese SAA (PRC/ROC)
 949    Korean (Unified Hangul; Extended Wansung)
 950    Chinese Traditional, Big5 (Taiwan, Hong Kong)
 966    Saudi Arabian
 972    Hebrew (Israeli VT100)
 999    reserved for user-definable codepages
1004    Desktop Publishing
1026    EBCDIC: Turkish (Latin 5)
1047    EBCDIC: International (CECP, de-facto EBCDIC-US)
1250    MSWIN: Eastern Europe (Latin 2)
1251    MSWIN: Cyrillic
1252    MSWIN: English/W. Europe/Standard (Latin 1)
1253    MSWIN: Greek (GRC)
1254    MSWIN: Turkish
1255    MSWIN: Hebrew
1256    MSWIN: Arabic
1257    MSWIN: Baltic (Estonian, Latvian, Lithuanian)
1258    MSWIN: Vietnamese
1361    ANSI???: Korean (Johab)
10000   MAC: International/Standard (Roman)
10006   MAC: Greek
10007   MAC: Cyrillic
10029   MAC: Latin 2
10079   MAC: Icelandic
10081   MAC: Turkish
10646   (should be reserved for the future ISO 10646 32-bit codepage???)
65400   OS/2: reserved for Glyphs
Notes:  not all code pages are available in all versions of DOS or
          DOS-compatibles, and many (particularly EBCDIC) have not been
          implemented for *any* DOS to date
        CECP = 'Country Extended CodePage' by IBM.
        Unicode (UCS-2) is a 16-bit character codeset, covering all commonly
          used characters from almost any language. Not all definitions are
          fixed at the time of this writing. Unicode will be the future of
          character coding for the foreseeable future, but is only the
          "basic multilingual plane" (BMP) subset of 32-bit ISO 10646 codes
          (UCS-4), a single character set standard covering requirements for
          all countries and languages, which is still under construction.
        The MS Windows 'ANSI' codepage 1252 (based on the MS Windows 3.0+
          implementation) appears to be 100% compatible with the code sets
          used by Amiga OS and Acorn Archimedes RISC-OS and is also a linear
          subset of the 16bit UniCode code set (UCS-2); the actual ANSI
          codepage is defined by ISO 8859-1 (Latin 1).
        At least applications for OS/2 Warp 3 Presentation Manager can use
          EBCDIC codepages, but the codepage ID assignments for EBCDIC
          codepages are not known for OS/2. OS/2 SAA codepages are not
          supported in CONFIG.SYS.  Codepage 65400 "Glyphs" is not actually a
          codepage, but a way to directly access the first 256 of the 383
          glyphs from the current font set.
        Novell DOS 7/DR DOS 6/Caldera OpenDOS undocumented codepage 853
          does not necessarily match with MS-DOS' undocumented codepage 853.
        Undocumented codepages 667 and 668 can be found in Russian's PTS/DOS
          6.51 and S/DOS 1.x DISPLAY.CPI and contain some Eastern European
          characters.
        Novell NetWare 3.xx clients support UniCode and codepages 437, 850,
          860, 863, 865, 897, 932, and 1252 (possibly more). NetWare 4.xx
          clients also support 1250, 1251, 1256. Personal NetWare 1.0 (PNW),
          as it was distributed in Europe, supports UniCode and codepages 437,
          850 and 1252.  Novell's Client32 for DOS/Windows supports 874, 932,
          936, 949, 950, 1250 - 1257. For codesets not yet available, Novell
          offers a reduced ASCII 7-bit support through a codepage 0 used as a
          translation table to UniCode, that supports characters 32-127 except
          92 ('\').

Format of DOS .CPI (Code Page Information) file header:
Offset  Size    Description     (Table 01758)
 00h    BYTE    ID tag
                FFh FONT file (Standard for generic display or
                      printer font files used by MS-DOS, PC-DOS, DR DOS
                      and Novell DOS)
                7Fh DRFONT file (Used by DR DOS 6.0 / Novell DOS 7 for
                      enhanced & compressed display font files. DR DOS 6.0
                      and Novell DOS 7 still support the standard FONT
                      files, thus allowing leaning of .CPI files from
                      MS-DOS to DR DOS / Novell DOS!)
 01h  7 BYTEs   ID string
                "FONT   " = FONT file (Standard for display or printer)
                "DRFONT " = DRFONT file (Enhanced compressed format used
                            by DR DOS 6.0 / Novell DOS 7 for display fonts)
 08h  8 BYTEs   reserved (0)
 10h    WORD    number of pointers (1)
 12h    BYTE    type of pointers (1)
 13h    DWORD   pointer to file offset of FontInfoHeader
                (Generally pointing to the byte just after FontFileHeader,
                     that is 0000h:0017h. Due to extra data at offset 17h, this
                     value has changed with DR DOS 6.0 / Novell DOS 7 DRFONTs!
                     "MS-DOS 4.0 programmers reference" claimed word offset
                     +15h as an endmarker (0000h), but actually it is the
                     High-Word of the pointer.)
--- Extended FontFileHeader with DR DOS 6.0 / Novell DOS 7 DRFONTs: ---
 17h    BYTE    number of fonts per codepage supported by this file
                     (N=4 with both DR DOS 6.0 / Novell DOS 7 DRFONT files)
 18h  N BYTEs   cellsize (Height) of fonts 1..N
                the cellsize corresponds with the character boxes height,
                  but is also the count of bytes used for each of the
                  characters inside the font data (as currently all fonts
                  are organized heightx8 and 8 pixel width is just one byte).
 var  N DWORDs  file offsets of DisplayFontData.

Format of DOS .CPI file Font Information Header:
Offset  Size    Description     (Table 01759)
 00h    WORD    number of codepage entries
        var     N codepage entry headers (see #01760)
SeeAlso: #01758

Format of DOS .CPI file CodePage Entry Header:
Offset  Size    Description     (Table 01760)
 00h    WORD    size of this header (normally 1Ch)
 02h    DWORD   offset of next entry, or 0000h:0000h or FFFFh:FFFFh if last
                (if a valid "next" pointer but all of the fonts indicated in
                  the .CPI header have been processed, this field normally
                  points at an optional text area at the end of the .CPI file
                  containing copyright information)
 06h    WORD    device type
                01h display (FONT or DRFONT)
                02h printer (FONT)
 08h  8 BYTEs   blank-padded device name string
 10h    WORD    code page (see #01757)
 12h  3 WORDs   reserved (0)
 18h    DWORD   pointer to Font Data Header (see #00222)
                normally immediately follows this header
SeeAlso: #01758

Format of DOS .CPI file Font Data Header:
Offset  Size    Description     (Table 01761)
 00h    WORD    record type
                0001h FONT
                0002h DRFONT (DR DOS 6.0/Novell DOS 7 display font)
 02h    WORD    number of fonts
 04h    WORD    length of font data (display fonts)
                ??? (printer fonts)
 06h    var     font data (#fonts * fontlength) bytes
SeeAlso: #01758

Format of DOS .CPI file ScreenFONT Header:
Offset  Size    Description     (Table 01762)
 00h  6 BYTEs   display-font header (see #01764)
 06h    var     display font data
SeeAlso: #01758

Format of .CPI file DRFONT Header:
Offset  Size    Description     (Table 01763)
 00h 6N BYTEs   DisplayFONT headers for N fonts (see #01764)
      M WORDs   character index table for cell offsets in font data
                currently 256 words in length
SeeAlso: #01758

Format of .CPI file DisplayFONT header:
Offset  Size    Description     (Table 01764)
 00h    BYTE    height of character cell
 01h    BYTE    width of character cell (currently always 08h)
 02h    BYTE    aspect ratio (height) (currently 00h, unused)
 03h    BYTE    aspect ratio (width) (currently 00h, unused)
 04h    WORD    number of characters per font (256)
SeeAlso: #01758

Format of .CPI file PrinterFONT header:
Offset  Size    Description     (Table 01765)
 00h    WORD    type of printer
                0001h (4201.CPI, 1050.CPI, EPS.CPI)
                0002h (4208.CPI, 5202.CPI, PPDS.CPI)
 02h    WORD    bytes per hardware/download codepage-select escape sequence
                (max 31, typically 12)
 04h  N BYTEs   escape sequence to select hardware codepage
      N BYTEs   escape sequence to select download codepage
        var     download data for printer font (including escape sequence to
                  transfer data)
SeeAlso: #01758
--------D-2167-------------------------------
INT 21 - DOS 3.3+ - SET HANDLE COUNT
        AH = 67h
        BX = size of new file handle table for process
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
Desc:   adjust the size of the per-process open file table, thus raising or
          lowering the limit on the number of files the caller can open
          simultaneously
Notes:  if BX <= 20, no action is taken if the handle limit has not yet been
          increased, and the table is copied back into the PSP if the limit
          is currently > 20 handles
        for file handle tables of > 20 handles, DOS 3.30 never reuses the
          same memory block, even if the limit is being reduced; this can lead
          to memory fragmentation as a new block is allocated and the existing
          one freed
        only the first 20 handles are copied to child processes in DOS 3.3-6.0
        increasing the file handles here will not, in general, increase the
          number of files that can be opened using the runtime library of a
          high-level language such as C
        Novell DOS 7 reportedly terminates the calling program if the JFT is
          being reduced in size and there are any open file handles beyond
          the portion of the JFT being retained
BUGS:   the original release of DOS 3.30 allocates a full 64K for the handle
          table on requests for an even number of handles
        DR DOS 3.41 and 5.0 will lose track of any open file handles beyond
          the portion of the JFT retained after the call; MS-DOS will indicate
          error 04h if any of the JFT entries to be removed are open
SeeAlso: AH=26h,AH=86h
--------D-2168-------------------------------
INT 21 - DOS 3.3+ - "FFLUSH" - COMMIT FILE
        AH = 68h
        BX = file handle
Return: CF clear if successful
            all data still in DOS disk buffers is written to disk immediately,
              and the file's directory entry is updated
        CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
SeeAlso: AX=5D01h,AH=6Ah,INT 2F/AX=1107h
--------D-2169-------------------------------
INT 21 U - DOS 4.0+ internal - GET/SET DISK SERIAL NUMBER
        AH = 69h
        AL = subfunction
            00h get serial number
            01h set serial number
        BL = drive (0=default, 1=A, 2=B, etc)
        BH = info level (00h only for DOS; OS/2 allows other levels)
        DS:DX -> disk info (see #01766)
Return: CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
            AX destroyed
            (AL = 00h) buffer filled with appropriate values from extended BPB
            (AL = 01h) extended BPB on disk set to values from buffer
Notes:  does not generate a critical error; all errors are returned in AX
        error 0005h given if no extended BPB on disk
        does not work on network drives (error 0001h)
        buffer after first two bytes is exact copy of bytes 27h thru 3Dh of
          extended BPB on disk
        this function is supported under Novell NetWare versions 2.0A through
          3.11; the returned serial number is the one a DIR would display,
          the volume label is the NetWare volume label, and the file system
          is set to "FAT16".
        this function is not supported by Novell DOS 7 through Update 13, but
          Personal NetWare 1.0 and Update 15 do support this function
        the serial number is computed from the current date and time when the
          disk is created; the first part is the sum of the seconds/hundredths
          and month/day, the second part is the sum of the hours/minutes and
          year
        the volume label which is read or set is the one stored in the extended
          BPB on disks formatted with DOS 4.0+, rather than the special root
          directory entry used by the DIR command in COMMAND.COM (use AH=11h
          to find that volume label)
SeeAlso: AX=440Dh"DOS 3.2+"

Format of disk info:
Offset  Size    Description     (Table 01766)
 00h    WORD    0000h (info level)
 02h    DWORD   disk serial number (binary)
 06h 11 BYTEs   volume label or "NO NAME    " if none present
 11h  8 BYTEs   (AL=00h only) filesystem type (see #01767)
Note:   under MS-DOS 7.0 or a Windows95 DOS box, the volume label field can be
          all blanks even when a volume label has been set (the Win95
          installation seems to blank the volume label field in the partition
          boot sector; once LABEL has been run, the volume label is reported
          correctly)
SeeAlso: AH=4Eh

(Table 01767)
Values for filesystem type:
 "FAT12   "     12-bit FAT
 "FAT16   "     16-bit FAT
 "CDROM   "     High-Sierra CD-ROM filesystem
 "CD001   "     ISO 9660 CD-ROM filesystem
 "CDAUDIO "     audio CD
SeeAlso: #01766
--------O-2169-------------------------------
INT 21 - DR DOS 5.0 - NULL FUNCTION
        AH = 69h
Return: AL = 00h
SeeAlso: AH=18h
--------v-216969-----------------------------
INT 21 - VIRUS - "Rape-747" - INSTALLATION CHECK
        AX = 6969h
Return: AX = 0666h if resident
SeeAlso: AX=58CCh,AX=6304h"VIRUS",AH=71h"VIRUS"
--------d-2169FFDX0000-----------------------
INT 21 U - CUBIT v4.00 - GET CUBIT INT 21 HANDLER
        AX = 69FFh
        DX = 0000h
        BX = CB00h (magic value)
Return: ES:BX -> CUBITR.EXE handler for INT 21
InstallCheck:   test that the first eight bytes at the returned interrupt
          handler are EBh 07h "CUBITR" (a short jump around the signature
          followed by the signature)
Note:   the byte following the signature (i.e. ES:[BX+8]) indicates whether
          CUBITR is active (01h) or disabled (00h)
SeeAlso: AX=69FFh/DX=CFBFh
Index:  installation check;CUBIT
--------d-2169FFDXCFBF-----------------------
INT 21 U - CUBIT v4.00 - UNINSTALL
        AX = 69FFh
        DX = CFBFh
        CX = EFCFh
        BX = CB00h (magic value)
Return: ES:BX -> CUBITR.EXE handler for INT 21
        CX = status
            2020h successful
            2222h failed
Note:   if DX is neither 0000h nor CFBFh on entry, some other code is executed
SeeAlso: AX=69FFh/DX=0000h
--------D-216A-------------------------------
INT 21 U - DOS 4.0+ - COMMIT FILE
        AH = 6Ah
        BX = file handle
Return: CF clear if successful
            AH = 68h
        CF set on error
            AX = error code (06h) (see #01680 at AH=59h/BX=0000h)
Note:   identical to AH=68h in DOS 5.0-6.0; not known whether this is the case
          in DOS 4.x
SeeAlso: AH=68h
--------D-216B-------------------------------
INT 21 U - DOS 4.0 internal - IFS IOCTL
        AH = 6Bh
        AL = subfunction
            00h ???
                DS:SI -> Current Directory Structure???
                CL = drive (1=A:)
            01h ???
                DS:SI -> ???
                CL = file handle???
            02h ???
                DS:SI -> Current Directory Structure???
                DI = ???
                CX = drive (1=A:)
Return: CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
Notes:  passed through to INT 2F/AX=112Fh with AX on top of stack
        Novell DOS 7 Update 15 returns CF set/AX=0001h (invalid function)
SeeAlso: AH=6Bh"DOS 5",INT 2F/AX=112Fh
--------D-216B-------------------------------
INT 21 U - DOS 5+ - NULL FUNCTION
        AH = 6Bh
Return: AL = 00h
Note:   this function does nothing and returns immediately
SeeAlso: AH=6Bh"DOS 4"
--------D-216C00-----------------------------
INT 21 - DOS 4.0+ - EXTENDED OPEN/CREATE
        AX = 6C00h
        BL = open mode as in AL for normal open (see also AH=3Dh)
            bit 7: inheritance
            bits 4-6: sharing mode
            bit 3 reserved
            bits 0-2: access mode
                100 read-only, do not modify file's last-access time (DOS 7.0)
        BH = flags
            bit 6 = auto commit on every write (see also AH=68h)
            bit 5 = return error rather than doing INT 24h
            bit 4 = (FAT32) extended size (allow 4GB files instead of 2GB)
        CX = create attribute (see #01769)
        DL = action if file exists/does not exist (see #01770)
        DH = 00h (reserved)
        DS:SI -> ASCIZ file name
Return: CF set on error
           AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
           AX = file handle
           CX = status (see #01768)
Notes:  the PC LAN Program only supports existence actions (in DL) of 01h,
          10h with sharing=compatibility, and 12h
        DR DOS reportedly does not support this function and does not return
          an "invalid function call" error when this function is used.
        the documented bits of BX are stored in the SFT when the file is opened
          (see #01641,#01642)
BUG:    this function has bugs (at least in DOS 5.0 and 6.2) when used with
          drives handled via the network redirector (INT 2F/AX=112Eh):
            - CX (attribute) is not passed to the redirector if DL=11h,
            - CX does not return the status, it is returned unchanged because
              DOS does a PUSH CX/POP CX when calling the redirector.
SeeAlso: AH=3Ch,AH=3Dh,AX=6C01h,AX=7160h/CL=00h,INT 2F/AX=112Eh

(Table 01768)
Values for extended open function status:
 01h    file opened
 02h    file created
 03h    file replaced

Bitfields for file create attribute:
Bit(s)  Description     (Table 01769)
 6-15   reserved
 5      archive
 4      reserved
 3      volume label
 2      system
 1      hidden
 0      readonly

Bitfields for action:
Bit(s)  Description     (Table 01770)
 7-4    action if file does not exist
        0000 fail
        0001 create
 3-0    action if file exists
        0000 fail
        0001 open
        0010 replace/open
--------O-216C01-----------------------------
INT 21 U - OS/2 v2.0 - "DosOpen2"
        AX = 6C01h
        BL = open mode as in AL for normal open (see also AH=3Dh)
            bit 7: inheritance
            bits 4-6: sharing mode
            bit 3 reserved
            bits 0-2: access mode
        BH = flags
            bit 6 = auto commit on every write (see also AH=68h)
            bit 5 = return error rather than doing INT 24h
        CX = create attribute (see #01769)
        DL = action if file exists/does not exist (see #01770)
        DH = 00h (reserved)
        DS:SI -> ASCIZ file name
        ES:DI -> EAOP structure
Return: CF set on error
           AX = error code (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
           AX = file handle
           CX = status (see #01768)
Note:   this function is virtually identical to AX=6C00h, but supports OS/2's
          extended attributes
SeeAlso: AX=5704h,AX=6C00h,AH=6Fh"OS/2"
--------D-216D-------------------------------
INT 21 U - DOS 5+ ROM - FIND FIRST ROM PROGRAM
        AH = 6Dh
        DS:DX -> ASCIZ program name (may contain wildcrds)
Return: CF clear if found
            Disk Transfer Area filled with ROM search structure (see #01771)
        CF set if not found
            AX = error code
                0002h name not found in ROM
                0003h name contains colon or backslash
        ---if not supported (DOS <5, MS-DOS 5+ non-ROM versions)---
        AL = 00h
Notes:  the '*' wildcard matches all remaining characters in a ROM program's
          name; any following characters in the search mask are ignored up to
          another asterisk, which must be matched by an asterisk in the
          found program's name.
        the search mask and program names may contain multiple periods
SeeAlso: AH=1Ah,AH=4Eh,AH=6Eh,AX=6F00h,AX=6F02h,INT 2F/AX=160Ch

Format of ROM search structure:
Offset  Size    Description     (Table 01771)
 00h 13 BYTEs   ASCIZ name of found ROM program
 0Dh    DWORD   address at which to resume search (do not modify)
 11h    var     ASCIZ search mask passed in (do not modify)
--------O-216D-------------------------------
INT 21 U - OS/2 v1.x FAPI - "DosMkDir2"
        AH = 6Dh
        ???
Return: ???
Desc:   create a new directory, with extended attribute information
Note:   also supported by OS/2 v2.0+ Virtual DOS Machines
BUG:    does not work under OS/2 v2.0 because MVDM does not translate the
          real-mode segment pointer in the Extended Attribute structure
          (see #01673) into a protected-mode selector; use AH=39h followed by
          AX=5703h instead
SeeAlso: AH=39h,AX=5702h"OS/2",AX=5703h"OS/2"
--------O-216D-------------------------------
INT 21 U - Novell DOS 7 - NOP
        AH = 6Dh
Return: AX = 0000h
Note:   this function invokes the same code as other NOP functions such as
          AH=18h and AH=61h
--------D-216E-------------------------------
INT 21 U - DOS 5+ ROM - FIND NEXT ROM PROGRAM
        AH = 6Eh
        Disk Transfer Area contains result of previous FindFirst ROM
          (see AH=6Dh)
Return: CF clear if found
            Disk Transfer Area filled with updated ROM search structure
              (see #01771)
        CF set if not found
            AX = 0012h (no more matches)
        ---if not supported (DOS <5, MS-DOS 5+ non-ROM versions)---
        AL = 00h
SeeAlso: AH=4Fh,AH=6Dh
--------O-216E-------------------------------
INT 21 U - OS/2 v1.x FAPI - "DosEnumAttrib"
        AH = 6Eh
        DS:SI -> parameter packet (see #01772)
Return: CF clear if successful
            AX = 0000h
            DS:SI buffer updated
        CF set on error
            AX = error code
Note:   also supported by OS/2 v2.0+ Virtual DOS Machines
SeeAlso: AX=5703h,AH=6Fh"OS/2",INT 2F/AX=112Dh

Format of OS/2 DosEnumAttrib parameter packet:
Offset  Size    Description     (Table 01772)
 00h    DWORD   reserved (0)
 04h    DWORD   info level (always 00000001h)
 08h    DWORD   (call) number of entries requested
                (ret) actual number of entries returned
 0Ch    DWORD   length of buffer
 10h    DWORD   pointer to buffer for results
 14h    DWORD   number of first entry to return
 18h    DWORD   -> file handle or ASCIZ pathname
 1Ch    WORD    flag: 00h = previous field is file handle, 01h = pathname
--------D-216F00-----------------------------
INT 21 U - DOS 5+ ROM - GET ROM SCAN START ADDRESS
        AX = 6F00h
Return: CF clear
        AL = 00h
            BX = current ROM scan starting segment if function supported
SeeAlso: AH=6Dh,AX=6F01h,AX=6F02h
--------O-216F00-----------------------------
INT 21 U - OS/2 v1.x FAPI - "DosQMaxEASize" - GET MAXIMUM SIZE OF EXTENDED ATTR
        AX = 6F00h
        DS:SI -> DWORD buffer for maximum size of an extended attribute
Return: CF clear if successful
            AX = 0000h
            buffer filled
        CF set on error
            AX = error code
Note:   also supported by OS/2 v2.0+ Virtual DOS Machines
SeeAlso: AX=5703h,AX=6C01h,AH=6Eh"OS/2"
--------D-216F01-----------------------------
INT 21 U - DOS 5+ ROM - SET ROM SCAN START ADDRESS
        AX = 6F01h
        BX = new ROM scan starting address
Return: CF clear
        AL = 00h
SeeAlso: AX=6F00h,AX=6F03h
--------D-216F02-----------------------------
INT 21 U - DOS 5+ ROM - GET EXCLUSION REGION LIST
        AX = 6F02h
        ES:BX -> buffer for exclusion region list (see #01773)
Return: CF clear
        AL = 00h
        ES:BX = 0000h:0000h on error, unchanged if buffer filled
Note:   for DOS versions which do not support this function, the return value
          is AL=00h, CF unchanged, ES:BX unchanged, and the ES:BX buffer
          unchanged
SeeAlso: AX=6F00h,AX=6F03h

Format of ROM exclusion region list:
Offset  Size    Description     (Table 01773)
 00h    WORD    number of entries
 02h 2N WORDs   start/end segments of N excluded regions
--------D-216F03-----------------------------
INT 21 U - DOS 5+ ROM - SET EXCLUSION REGION LIST
        AX = 6F03h
        DS:DX -> new exclusion region list (see #01773)
Return: CF clear
        AL = 00h
Notes:  DOS saves only the pointer and assumes that the contents of the list
          are never changed, and that regions do not overlap
        if AL > 03h on entry, DOS returns CF set/AL=01h
SeeAlso: AX=6F01h,AX=6F02h
--------D-2170-------------------------------
INT 21 - MS-DOS 7 (Windows95) - GET/SET INTERNATIONALIZATION INFORMATION
        AH = 70h
        AL = subfunction
            00h get ??? info
                CX = buffer size (3Ah bytes needed)
                ES:DI -> buffer
            01h set above info
                CX = number of bytes to set
                DS:SI -> buffer containing ??? info (see #01774)
            02h set general internationalization info (see also AX=6500h)
                DS:SI -> buffer containing info (see #01775)
                CX = buffer size in bytes (up to 26h bytes used)
                first three bytes are skipped, the rest is copied to somewhere
                  in the DOS data segment
Return: CF clear if successful
            ES:DI buffer filled (func 00h) (see #01774)
            CX = number of bytes actually set or returned
                  (max 003Ah for functions 00h and 01h under v7.00, 0026h for
                  function 02h)
        CF set on error
            AX = error code
                7000h if function not supported
SeeAlso: AH=38h,AH=65h

Format of MS-DOS v7.0 ??? table:
Offset  Size    Description     (Table 01774)
 00h 58 BYTEs   ??? country-specific information
                returned was (among others) "ENU USA GR"..."AM PM M/d/yy"...
                 "dddd,MMMMdd,yyyy" in the German Preview version, and "US"
                 instead of "GR" in the US build 450 version (with German
                 country setting) and the US build 950a version with US
                 country settings
SeeAlso: #01775

Format of MS-DOS v7.0 internationalization table:
Offset  Size    Description     (Table 01775)
 00h  3 BYTEs   unused (and ignored by DOS)
 03h    WORD    country ID (see #01400 at AH=38h)
 05h    WORD    code page (see #01757)
 07h    WORD    date format
 09h  5 BYTEs   ASCIZ current symbol string
 07h  2 BYTEs   ASCIZ thousands separator
 09h  2 BYTEs   ASCIZ decimal separator
 0Bh  2 BYTEs   ASCIZ date separator
 0Dh  2 BYTEs   ASCIZ time separator
 0Fh    BYTE    currency format
                bit 2 = set if currency symbol replaces decimal point
                bit 1 = number of spaces between value and currency symbol
                bit 0 = 0 if currency symbol precedes value
                        1 if currency symbol follows value
 10h    BYTE    number of digits after decimal in currency
 11h    BYTE    time format
                bit 0 = 0 if 12-hour clock
                        1 if 24-hour clock
 12h    DWORD   address of case map routine
                (FAR CALL, AL = character to map to upper case [>= 80h])
 16h  2 BYTEs   ASCIZ data-list separator
 18h 10 BYTEs   reserved
Note:   this table has the identical format to the extended country information
          retrieved via AH=65h with info ID = 01h
SeeAlso: #01399,#01750
----------217070BX6060-----------------------
INT 21 - PCW Weather Card interface - GET DATA SEGMENT
        AX = 7070h
        BX = 6060h
        CX = 7070h
        DX = 7070h
        SI = 7070h
        DI = 7070h
Return: AX = segment of data structure (see #01776)
Notes:  the data structure is at offset 516 from this segment
        the update byte is at offset 514 from this segment.  Updates are
          once per second while this byte is nonzero and it is decremented
          once per second.  While this byte is 0 updates are once per minute.
SeeAlso: AX=7070h/BX=7070h

Format of PCW Weather Card data structure:
Offset  Type    Description     (Table 01776)
 00h    WORD    hour
 02h    WORD    minute
 04h    WORD    second
 06h    WORD    day
 08h    WORD    month
 0Ah    WORD    year
 0Ch    WORD    ???
 0Eh    WORD    relative barometric pressure (in 1/100 inches)
 10h    WORD    ???
 12h    WORD    ???
 14h    WORD    temperature 1 (in 1/10 degrees F)
 16h    WORD    temperature 1 lowest (in 1/10 degrees F)
 18h    WORD    temperature 1 highest (in 1/10 degrees F)
 1Ah    WORD    temperature 2 (in 1/10 degrees F)
 1Ch    WORD    temperature 2 lowest (in 1/10 degrees F)
 1Eh    WORD    temperature 2 highest (in 1/10 degrees F)
 20h    WORD    wind speed (in MPH)
 22h    WORD    average of 60 wind speed samples (in MPH)
 24h    WORD    highest wind speed (in MPH)
 26h    WORD    wind chill factor  (in 1/10 degrees F)
 28h    WORD    lowest wind chill factor (in 1/10 degrees F)
 2Ah    WORD    ???
 2Ch    WORD    wind direction (in degrees)
 2Eh    WORD    accumulated daily rainfall (in 1/10 inches)
 30h    WORD    accumulated annual rainfall (in 1/10 inches)
----------217070BX7070-----------------------
INT 21 - PCW Weather Card interface - INSTALLATION CHECK
        AX = 7070h
        BX = 7070h
        CX = 7070h
        DX = 7070h
        SI = 7070h
        DI = 7070h
Return: AX = 0070h
        BX = 0070h
        CX = 0070h
        DX = 0070h
        SI = 0070h
        DI = 0070h
SeeAlso: AX=7070h/BX=6060h,AX=8080h
--------D-2171-------------------------------
INT 21 - Windows95 - LONG FILENAME FUNCTIONS
        AH = 71h
        AL = function
            0Dh reset drive (see AX=710Dh)
            39h create directory (see AX=7139h)
            3Ah remove directory (see AX=713Ah)
            3Bh set current directory (see AX=713Bh)
            41h delete file (see AX=7141h)
            43h get/set file attributes (see AX=7143h)
            47h get current directory (see AX=7147h)
            4Eh find first file (see AX=714Eh)
            4Fh find next file (see AX=714Fh)
            56h move (rename) file (see AX=7156h)
            60h truename (see AX=7160h/CL=00h,AX=7160h/CL=02h)
            6Ch create/open file (see AX=716Ch)
            A0h get volume information (see AX=71A0h)
            A1h terminate FindFirst/FindNext (see AX=71A1h)
            A6h get file information (see AX=71A6h)
            A7h time conversion (see AX=71A7h/BL=00h,AX=71A7h/BL=01h)
            A8h generate short filename (see AX=71A8h)
            A9h server create/open file (see AX=71A9h)
            AAh create/terminate SUBST (see AX=71AAh/BH=00h,AX=71AAh/BH=02h)
Return: CF set on error
            AX = error code (see #01680)
                7100h if function not supported
        CF clear if successful
            other registers as for corresponding "old" DOS function
Notes:  if error 7100h is returned, the old-style function should be called
        AX=714Eh returns a "search handle" which must be passed to AX=714Fh;
          when the search is complete, AX=71A1h must be called to terminate
          the search
        for compatibility with DOS versions prior to v7.00, the carry flag
          should be set on call to ensure that it is set on exit
SeeAlso: AH=39h,AH=3Ah,AH=3Bh,AH=41h,AX=4300h,AX=4301h,AX=4304h,AX=4306h
SeeAlso: AX=4307h,AH=47h,AH=4Eh,AH=4Fh,AH=56h,AH=6Ch,AX=714Eh,AX=714Fh
--------v-2171-------------------------------
INT 21 - VIRUS - "1205" - INSTALLATION CHECK
        AH = 71h
Return: AH = 17h if "1205" is resident
SeeAlso: AX=6969h"VIRUS",AH=76h"VIRUS"
--------D-21710D-----------------------------
INT 21 - Windows95 - RESET DRIVE
        AX = 710Dh
        CX = action (see #01777)
        DX = drive number
Return: CF clear
Note:   for compatibility with DOS versions prior to v7.00, the carry flag
          should be set on call to ensure that it is set on exit
SeeAlso: AH=0Dh

(Table 01777)
Values for drive reset action:
 0000h  flush filesystem buffers for drive, and reset drive
 0001h  flush filesystem buffers and cache for drive, and reset drive
 0002h  remount DriveSpace volume
--------D-217139-----------------------------
INT 21 - Windows95 - LONG FILENAME - MAKE DIRECTORY
        AX = 7139h
        DS:DX -> ASCIZ long directory name (including path)
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680)
                7100h if function not supported
Note:   for compatibility with DOS versions prior to v7.00, the carry flag
          should be set on call to ensure that it is set on exit
SeeAlso: AH=39h,AX=713Ah,AX=713Bh,AX=43FFh/BP=5053h
--------D-21713A-----------------------------
INT 21 - Windows95 - LONG FILENAME - REMOVE DIRECTORY
        AX = 713Ah
        DS:DX -> ASCIZ long name of directory to remove
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680)
                7100h if function not supported
Note:   for compatibility with DOS versions prior to v7.00, the carry flag
          should be set on call to ensure that it is set on exit
SeeAlso: AH=3Ah,AX=7139h
--------D-21713B-----------------------------
INT 21 - Windows95 - LONG FILENAME - CHANGE DIRECTORY
        AX = 713Bh
        DS:DX -> ASCIZ long name of directory to make current
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680)
                7100h if function not supported
Note:   for compatibility with DOS versions prior to v7.00, the carry flag
          should be set on call to ensure that it is set on exit
SeeAlso: AH=0Eh,AH=3Bh,AX=7139h
--------D-217141-----------------------------
INT 21 - Windows95 - LONG FILENAME - DELETE FILE
        AX = 7141h
        DS:DX -> ASCIZ long name of file to delete
        SI = wildcard and attributes flag
                0000h wildcards are not allowed, and search attributes are
                        ignored
                0001h wildcards are allowed, and only files with matching
                        names and attributes are deleted
        CL = search attributes
        CH = must-match attributes
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680)
                7100h if function not supported
Note:   for compatibility with DOS versions prior to v7.00, the carry flag
          should be set on call to ensure that it is set on exit
SeeAlso: AH=41h
--------D-217143-----------------------------
INT 21 - Windows95 - LONG FILENAME - EXTENDED GET/SET FILE ATTRIBUTES
        AX = 7143h
        DS:DX -> ASCIZ filename
        BL = action
            00h retrieve attributes
                Return: CX = file attributes (see #01420)
            01h set attributes
                CX = attributes
            02h get physical size of compressed file
                Return: DX:AX = actual disk usage of file, in bytes
            03h set last write date/time
                DI = new last-write date (see #01666)
                CX = new last-write time (see #01665)
            04h get last write date/time
                Return: CX = last write time (see #01665)
                        DI = last write date (see #01666)
            05h set last access date
                DI = new last-access date (see #01666)
            06h get last access date
                Return: DI = last access date (see #01666)
            07h set creation date/time
                DI = new creation date (see #01666)
                CX = new creation time (see #01665)
                SI = hundredths (10-millisecond units past time in CX, 0-199)
            08h get creation date/time
                Return: CX = creation time (see #01665)
                        DI = creation date (see #01666)
                        SI = hundredths (10-millisecond units past time in CX)
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680)
                7100h if function not supported
Note:   for compatibility with DOS versions prior to v7.00, the carry flag
          should be set on call to ensure that it is set on exit
SeeAlso: AX=4300h,AX=4301h
--------D-217147-----------------------------
INT 21 - Windows95 - LONG FILENAME - GET CURRENT DIRECTORY
        AX = 7147h
        DL = drive number (00h = current, 01h = A:, etc.)
        DS:SI -> buffer for ASCIZ directory name
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680)
                7100h if function not supported
Notes:  the returned pathname does not include the drive letter, colon, or
          leading backslash, and is not necessarily a long filename -- this
          function returns whatever path was used when changing to the
          current directory, and may include a mixture of long and short
          components
        the provided buffer must be at least as large as the value indicated
          by AX=71A0h
        for compatibility with DOS versions prior to v7.00, the carry flag
          should be set on call to ensure that it is set on exit
SeeAlso: AH=47h,AX=713Bh,AX=7160h,AX=71A0h
--------D-21714E-----------------------------
INT 21 - Windows95 - LONG FILENAME - FIND FIRST MATCHING FILE
        AX = 714Eh
        CL = allowable-attributes mask (see #01420 at AX=4301h)
              (bits 0 and 5 ignored)
        CH = required-attributes mask (see #01420)
        SI = date/time format (see #01778)
        DS:DX -> ASCIZ filespec (both "*" and "*.*" match any filename)
        ES:DI -> FindData record (see #01779)
Return: CF clear if successful
            AX = filefind handle (needed to continue search)
            CX = Unicode conversion flags (see #01780)
        CF set on error
            AX = error code
                7100h if function not supported
Notes:  this function is only available when IFSMgr is running, not under bare
          MS-DOS 7
        the application should close the filefind handle with AX=71A1h as soon
          as it has completed its search
        for compatibility with DOS versions prior to v7.00, the carry flag
          should be set on call to ensure that it is set on exit
SeeAlso: AH=4Eh,AX=714Fh,AX=71A1h

(Table 01778)
Values for Windows95 date/time format:
 0000h  use 64-bit file time format
 0001h  use MS-DOS date/time values (see #01665,#01666) in low double-word of
          file time QWORD (date is high word, time is low word of double-word)
SeeAlso: #01779

Format of Windows95 long filename FindData record:
Offset  Size    Description     (Table 01779)
 00h    DWORD   file attributes
                bits 0-6 standard DOS attributes (see #01420 at INT 21/AX=4301h)
                bit 8: temporary file
 04h    QWORD   file creation time (number of 100ns intervals since 1/1/1601)
 0Ch    QWORD   last access time
 14h    QWORD   last modification time
 1Ch    DWORD   file size (high 32 bits)
 20h    DWORD   file size (low 32 bits)
 24h  8 BYTEs   reserved (apparently unused)
 2Ch 260 BYTEs  ASCIZ full filename
130h 14 BYTEs   ASCIZ short filename (for backward compatibility)
Note:   under Windows95B, the ASCIZ short filename will be the empty string
          if the directory does not contain a long filename entry for the
          file; in that case, the application should use the full filename
SeeAlso: #01780

Bitfields for Windows95 Unicode conversion flags:
Bit(s)  Description     (Table 01780)
 0      the returned full filename contains underscores for un-convertable
          Unicode characters
 1      the returned short filename contains underscores for un-convertable
          Unicode characters
SeeAlso: #01779
--------D-21714F-----------------------------
INT 21 - Windows95 - LONG FILENAME - FIND NEXT MATCHING FILE
        AX = 714Fh
        BX = filefind handle (from AX=714Eh)
        SI = date/time format (see #01778)
        ES:DI -> buffer for FindData record (see #01779)
Return: CF clear if successful
            AH = 4Fh (undocumented)
            AL destroyed (becomes low byte of filefind handle in Win95B)
            CX = Unicode conversion flags (see #01780)
        CF set on error
            AX = error code
                7100h if function not supported
Notes:  this function is only available when IFSMgr is running, not under bare
          MS-DOS 7
        for compatibility with DOS versions prior to v7.00, the carry flag
          should be set on call to ensure that it is set on exit
SeeAlso: AH=4Eh,AX=714Eh,AX=71A1h,AX=71A2h
--------D-217156-----------------------------
INT 21 - Windows95 - LONG FILENAME - RENAME FILE
        AX = 7156h
        DS:DX -> ASCIZ old file or directory name (long names allowed)
        ES:DI -> ASCIZ new name (long names allowed)
Return: CF clear if successful
        CF set on error
            AX = error code
                7100h if function not supported
Note:   the file may be renamed into a different directory, but not across
          disks
SeeAlso: AH=56h,AX=7141h,AX=43FFh/BP=5053h
--------D-217160CL00-------------------------
INT 21 - Windows95 - LONG FILENAME - "TRUENAME" - CANONICALIZE PATH
        AX = 7160h
        CL = 00h
        CH = SUBST expansion flag
            00h return a path containing true path for a SUBSTed drive letter
            80h return a path containing the SUBSTed drive letter
        DS:SI -> ASCIZ filename or path (either long name or short name)
        ES:DI -> 261-byte buffer for canonicalized name
Return: CF set on error
            AX = error code
                02h invalid component in directory path or drive letter only
                03h malformed path or invalid drive letter
            ES:DI buffer unchanged
        CF clear if successful
            ES:DI buffer filled with fully qualified name
            AX destroyed
Desc:   determine the canonical name of the specified filename or path,
          corresponding to the undocumented TRUENAME command in COMMAND.COM
Notes:  if a complete path is given, the result will be a short-form complete
          path; otherwise, the given relative path is appended to the
          short-form current directory name, '.'/'..'/'...'/etc. are resolved,
          and the final result uppercased without converting any remaining
          long-form names to short-form
        for compatibility with DOS versions prior to v7.00, the carry flag
          should be set on call to ensure that it is set on exit
BUG:    Windows95 incorrectly treats filenames where the first two characters
          after the drive letter and colon are both slashes (either forward
          or backward) as a UNC (network name) and requires several seconds
          to attempt to resolve the name before returning an unchanged
          string
SeeAlso: AH=60h,AX=7160h/CL=01h
--------D-217160CL01-------------------------
INT 21 - Windows95 - LONG FILENAME - GET SHORT (8.3) FILENAME FOR FILE
        AX = 7160h
        CL = 01h
        CH = SUBST expansion flag
            00h return a path containing true path for a SUBSTed drive letter
            80h return a path containing the SUBSTed drive letter
        DS:SI -> ASCIZ long filename or path
        ES:DI -> 67-byte (possibly 128-byte) buffer for short filename
Return: CF set on error
            AX = error code
                02h invalid component in directory path or drive letter only
                03h malformed path or invalid drive letter
            ES:DI buffer unchanged
        CF clear if successful
            ES:DI buffer filled with equivalent short filename (full path,
                  even if relative path given, and all uppercase)
Note:   this call returns the short name for any long-filename portions of
          the provided pathname or filename
SeeAlso: AH=60h,AX=7160h/CL=00h,AX=7160h/CL=02h
--------D-217160CL02-------------------------
INT 21 - Windows95 - LONG FILENAME - GET CANONICAL LONG FILENAME OR PATH
        AX = 7160h
        CL = 02h
        CH = SUBST expansion flag
            00h return a path containing true path for a SUBSTed drive letter
            80h return a path containing the SUBSTed drive letter
        DS:SI -> ASCIZ short filename or path
        ES:DI -> 261-byte buffer for canonicalized long name
Return: CF set on error
            AX = error code
                02h invalid component in directory path or drive letter only
                03h malformed path or invalid drive letter
            ES:DI buffer unchanged
        CF clear if successful
            ES:DI buffer filled with qualified long name (can contain
                  lowercase letters)
Desc:   determine the canonical name of the specified filename or path,
          corresponding to the undocumented TRUENAME command in COMMAND.COM
BUGS:   even though the maximum length of a complete long pathname is 260
          characters, Windows95 returns CF set/AX=0003h even if the file
          exists whenever the full pathname is more than 255 characters
        Windows95 incorrectly treats filenames where the first two characters
          after the drive letter and colon are both slashes (either forward
          or backward) as a UNC (network name) and requires several seconds
          to attempt to resolve the name before returning an unchanged
          string
SeeAlso: AH=60h,AX=7160h/CL=00h,AX=7160h/CL=01h
--------D-21716C-----------------------------
INT 21 - Windows95 - LONG FILENAME - CREATE OR OPEN FILE
        AX = 716Ch
        BX = access mode and sharing flags (see #01782,also AX=6C00h)
        CX = attributes
        DX = action (see #01781)
        DS:SI -> ASCIZ filename
        DI = alias hint (number to append to short filename for disambiguation)
Return: CF clear if successful
            AX = file handle
            CX = action taken
                0001h file opened
                0002h file created
                0003h file replaced
        CF set on error
            AX = error code (see #01680)
                7100h if function not supported
SeeAlso: AX=6C00h,AX=7141h,AX=7156h,AX=71A9h

Bitfields for Windows95 long-name open action:
Bit(s)  Description     (Table 01781)
 0      open file (fail if file does not exist)
 1      truncate file if it already exists (fail if file does not exist)
 4      create new file if file does not already exist (fail if exists)
Note:   the only valid combinations of multiple flags are bits 4&0 and 4&1

Bitfields for Windows95 file access/sharing modes:
Bit(s)  Description     (Table 01782)
 2-0    file access mode
        000 read-only
        001 write-only
        010 read-write
        100 read-only, do not modify file's last-access time
 6-4    file sharing modes
 7      no-inherit flag
 8      do not buffer data (requires that all reads/writes be exact physical
          sectors)
 9      do not compress file even if volume normally compresses files
 10     use alias hint in DI as numeric tail for short-name alias
 12-11  unused??? (0)
 13     return error code instead of generating INT 24h if critical error
          while opening file
 14     commit file after every write operation
SeeAlso: #01402
--------D-2171A0-----------------------------
INT 21 - Windows95 - LONG FILENAME - GET VOLUME INFORMATION
        AX = 71A0h
        DS:DX -> ASCIZ root name (e.g. "C:\")
        ES:DI -> buffer for file system name
        CX = size of ES:DI buffer
Return: CF clear if successful
            AX destroyed (0000h and 0200h seen)
            BX = file system flags (see #01783)
            CX = maximum length of file name [usually 255]
            DX = maximum length of path [usually 260]
            ES:DI buffer filled (ASCIZ, e.g. "FAT","NTFS","CDFS")
        CF set on error
            AX = error code
                7100h if function not supported
Notes:  for the file system name buffer, 32 bytes should be sufficient; that's
         what is used in some sample code by Walter Oney from Microsoft.
        this function accesses the disk the first time it is called
BUG:    this function returns DX=0000h for CD-ROM drives under Win95 SP1
SeeAlso: AX=714Eh,AX=7160h/CL=00h

Bitfields for long filename volume information flags:
Bit(s)  Description     (Table 01783)
 0      searches are case sensitive
 1      preserves case in directory entries
 2      uses Unicode characters in file and directory names
 3-13   reserved (0)
 14     supports DOS long filename functions
 15     volume is compressed
--------D-2171A1-----------------------------
INT 21 - Windows95 - LONG FILENAME - "FindClose" - TERMINATE DIRECTORY SEARCH
        AX = 71A1h
        BX = filefind handle (from AX=714Eh)
Return: CF clear if successful
        CF set on error
           AX = error code
                7100h if function not supported
Notes:  this function must be called after starting a search with AX=714Eh,
          to indicate that the search handle returned by that function will
          no longer be used
        this function is only available when IFSMgr is running, not under bare
          MS-DOS 7
SeeAlso: AH=4Eh,AX=714Eh,AX=714Fh
--------D-2171A2-----------------------------
INT 21 U - Windows95 - internal - LONG FILENAME - FIND NEXT MATCHING FILE
        AX = 71A2h
        BX = filefind handle (from AX=714Eh)
        SI = date/time format (see #01778)
        ES:DI -> buffer for FindData record (see #01779)
Return: CF clear if successful
            AX = 71A2h
            CX = Unicode conversion flags (see #01780)
        CF set on error
            AX = error code
                7100h if function not supported
Notes:  this function is only available when IFSMgr is running, not under bare
          MS-DOS 7; it is functionally identical to AX=714Fh
        documented as "for internal use by Windows 95 only"
--------D-2171A3-----------------------------
INT 21 U - Windows95 - internal
        AX = 71A3h
        ???
Return: ???
Note:   documented as "for internal use by Windows 95 only"
--------D-2171A4-----------------------------
INT 21 U - Windows95 - internal
        AX = 71A4h
        ???
Return: ???
Note:   documented as "for internal use by Windows 95 only"
--------D-2171A5-----------------------------
INT 21 U - Windows95 - internal
        AX = 71A5h
        ???
Return: ???
Note:   documented as "for internal use by Windows 95 only"
--------D-2171A6-----------------------------
INT 21 - Windows95 - LONG FILENAME - GET FILE INFO BY HANDLE
        AX = 71A6h
        BX = file handle
        DS:DX -> buffer for file information (see #01784)
        CF set
Return: CF clear if successful
            file information record filled
        CF set on error
            AX = error code
                7100h if function not supported
SeeAlso: AX=71A7h/BL=00h

Format of Windows95 file information:
Offset  Size    Description     (Table 01784)
 00h    DWORD   file attributes
 04h    QWORD   creation time (0 = unsupported)
 0Ch    QWORD   last access time (0 = unsupported)
 14h    QWORD   last write time
 1Ch    DWORD   volume serial number
 20h    DWORD   high 32 bits of file size
 24h    DWORD   low 32 bits of file size
 28h    DWORD   number of links to file
 2Ch    DWORD   unique file identifier (high 32 bits)
 30h    DWORD   unique file identifier (low 32 bits)
Note:   the file identifer and volume serial number together uniquely identify
          a file while it is open; the identifier may change when the system
          is restarted or the file is first opened
--------D-2171A7BL00-------------------------
INT 21 - Windows95 - LONG FILENAME - FILE TIME TO DOS TIME
        AX = 71A7h
        BL = 00h
        DS:SI -> QWORD file time
Return: CF clear if successful
            CX = DOS time (see #01665)
            DX = DOS date (see #01666)
            BH = hundredths (10-millisecond units past time in CX)
        CF set on error
            AX = error code
                7100h if function not supported
Desc:   convert Win95 64-bit file time (UTC) into DOS-style date and time
          (local timezone)
Note:   the conversion fails if the file time's value is outside the range
          01jan1980 and 31dec2107
SeeAlso: AX=71A6h,AX=71A7h/BL=01h
--------D-2171A7BL01-------------------------
INT 21 - Windows95 - LONG FILENAME - DOS TIME TO FILE TIME
        AX = 71A7h
        BL = 01h
        CX = DOS time (see #01665)
        DX = DOS date (see #01666)
        BH = hundredths (10-millisecond units past time in CX)
        ES:DI -> buffer for QWORD file time
Return: CF clear if successful
            ES:DI buffer filled
        CF set on error
            AX = error code
                7100h if function not supported
Desc:   convert DOS-style date and time (local timezone) into Win95 64-bit
          file time (UTC)
SeeAlso: AX=71A6h,AX=71A7h/BL=00h
--------D-2171A8-----------------------------
INT 21 - Windows95 - LONG FILENAME - GENERATE SHORT FILENAME
        AX = 71A8h
        DS:SI -> ASCIZ long filename (no path allowed!)
        ES:DI -> buffer for ASCIZ short filename
        DH = short name's format
            00h 11-char directory entry/FCB filename format
            01h DOS 8.3
        DL = character sets
            bits 7-4: short name's character set (see #01785)
            bits 3-0: long name's character set (see #01785)
Return: CF clear if successful
            ES:DI buffer filled
        CF set on error
            AX = error code
                7100h if function not supported
Note:   this function uses the same algorithm as the filesystem except that
          the returned name never has a numeric tail for disambiguation
SeeAlso: AX=7160h/CL=00h,AX=7160h/CL=02h,AX=71A7h/BL=00h

(Table 01785)
Values for Windows95 filename character set:
 00h    Windows ANSI
 01h    current OEM character set
 02h    Unicode
--------D-2171A9-----------------------------
INT 21 - Windows95 - LONG FILENAME - SERVER CREATE OR OPEN FILE
        AX = 71A9h
        BX = access mode and sharing flags (see #01782,also AX=6C00h)
        CX = attributes
        DX = action (see #01781)
        DS:SI -> ASCIZ filename
        DI = alias hint (number to append to short filename for disambiguation)
Return: CF clear if successful
            AX = global file handle
            CX = action taken
                0001h file opened
                0002h file created
                0003h file replaced
        CF set on error
            AX = error code (see #01680)
                7100h if function not supported
Note:   for use by real-mode servers only
SeeAlso: AX=6C00h,AX=716Ch
--------D-2171AABH00-------------------------
INT 21 - Windows95 - LONG FILENAME - CREATE SUBST
        AX = 71AAh
        BH = 00h
        BL = drive number (00h = default, 01h = A:, etc.)
        DS:DX -> ASCIZ pathname to associate with drive letter
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680)
                7100h if function not supported
SeeAlso: AX=71AAh/BH=01h,AX=71AAh/BH=02h,INT 2F/AX=1000h,#01643
--------D-2171AABH01-------------------------
INT 21 - Windows95 - LONG FILENAME - TERMINATE SUBST
        AX = 71AAh
        BH = 01h
        BL = drive number (01h = A:, etc.)
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680)
                7100h if function not supported
Note:   the specified drive number may not be 00h (default), and presumably not
          the current drive either
SeeAlso: AX=71AAh/BH=00h,AX=71AAh/BH=02h,INT 2F/AX=1000h,#01643
--------D-2171AABH02-------------------------
INT 21 - Windows95 - LONG FILENAME - QUERY SUBST
        AX = 71AAh
        BH = 02h
        BL = drive number (01h = A:, etc.)
        DS:DX -> buffer for ASCIZ pathname associated with drive letter
Return: CF clear if successful
            DS:DX buffer filled
        CF set on error
            AX = error code (see #01680)
                7100h if function not supported
Note:   the specified drive number may not be 00h (default drive)
SeeAlso: AX=71AAh/BH=00h,AX=71AAh/BH=01h,INT 2F/AX=1000h,#01643
--------D-2172-------------------------------
INT 21 - Windows95 beta - LFN-FindClose
        AH = 72h
        details not available
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680)
                7200h if function not supported (e.g. under bare MS-DOS 7)
Note:   this function was present in beta versions of Windows95, but is
          probably not present in the release version
SeeAlso: AX=71A1h
--------D-2173-------------------------------
INT 21 - MS-DOS 7 - DRIVE LOCKING ???
        AH = 73h
        DL = drive (0=current, 1=A:, etc.)
        CL = which flag to get or set
            00h drive flag???
            01h ???
        AL = subfunction
            00h get ???
            01h set ???
                CH = new values for ??? flags
                    bit 1: ??? (CL=00h only)
                    bit 3: ??? (CL=01h only)
Return: CF clear if successful
            for AL=00h:
                AL = value of CL on entry
                for CL=00h: AH = new flag and 06h (i.e. bits 1 and 2 used)
                for CL=01h: AH = new flag and 08h (i.e. bit 3 used)
                (flag being taken from a table of bytes)
        CF set on error
            AX = error code (01h,0Fh,etc.) (see #01680)
                7300h if function not supported
Note:   these two subfunctions are available even when only the MS-DOS kernel
          is running
--------D-217302-----------------------------
INT 21 - Windows95 - FAT32 - "Get_ExtDPB" - GET EXTENDED DPB
        AX = 7302h
        DL = drive number (00h=default, 01h=A:, etc.)
        ES:DI -> buffer for returned data (see #01786)
        CX = length of buffer (003Fh for Windows95)
        SI = signature (undocumented, must be F1A6h to get device driver
              address and next-DBP pointer) (see #01787)
Return: CF clear if successful
            ES:DI buffer filled
        CF set on error
            AX = error code
               0018h bad buffer length
SeeAlso: AX=7303h,AX=7304h,AH=1Fh,AH=32h

Format of Get_ExtDPB data buffer:
Offset  Size    Description     (Table 01786)
 00h    WORD    (call) length of following data (003Dh)
 02h 61 BYTEs   (ret) drive parameter block (DPB) (see #01787)
 
Format of Extended Drive Parameter Block:
Offset  Size    Description     (Table 01787)
 00h 24 BYTEs   standard DOS 4+ DPB
 18h    BYTE    "dpb_flags" (undocumented)
                FFh force media check
 19h    DWORD   pointer to next DPB (see note)
 1Dh    WORD    cluster at which to start search for free space when writing,
                usually the last cluster allocated
 1Fh    WORD    number of free clusters on drive, FFFFh = unknown
 21h    WORD    high word of free cluster count
 23h    WORD    active FAT/mirroring
                bit 7: do not mirror active FAT to inactive FATs
                bits 6-4: reserved (0)
                bits 3-0: the 0-based FAT number of the active FAT
                    (only meaningful if mirroring disabled)             
 25h    WORD    sector number of file system information sector, or
                  FFFFh for none (see also #01788)
 27h    WORD    sector number of backup boot sector, or FFFFh for none
 29h    DWORD   first sector number of the first cluster
 2Dh    DWORD   maximum cluster number
 31h    DWORD   number of sectors occupied by FAT
 35h    DWORD   cluster number of start of root directory
 39h    DWORD   cluster number at which to start searching for free space
Notes:  except for offset 18h, all of the first 33 bytes are identical to
          the standard DOS 4-6 DPB
        unless the proper value is given in SI on entry to "Get_ExtDBP", the
          next-DPB pointer and device driver address are set to 0000h:0000h
SeeAlso: #01786,#01395 at AH=32h,#01664

Format of File System Information structure:
Offset  Size    Description     (Table 01788)
 00h    DWORD   signature 61417272h
 04h    DWORD   number of free clusters (FFFFFFFFh if unknown)
 08h    DWORD   most recently allocated cluster
 0Ch 12 BYTEs   reserved
SeeAlso: #01787
--------D-217303-----------------------------
INT 21 - Windows95 - FAT32 - GET EXTENDED FREE SPACE ON DRIVE
        AX = 7303h
        DS:DX -> ASCIZ string for drive ("C:\" or "\\SERVER\Share")
        ES:DI -> buffer for extended free space structure (see #01789)
        CX = length of buffer for extended free space
Return: CF clear if successful
            ES:DI buffer filled
        CF set on error
            AX = error code
Notes:  this function reportedly returns a maximum of 2GB free space even on
          an FAT32 partition larger than 2GB under some versions of Win95,
          apparently by limiting the number of reported free clusters to no
          more than 64K
        on DOS versions which do not support the FAT32 calls, this function
          returns CF clear/AL=00h (which is the DOS v1+ method for reporting
          unimplemented functions)
SeeAlso: AX=7302h,AX=7304h,AX=7305h,AH=36h

Format of extended free space structure:
Offset  Size    Description     (Table 01789)
 00h    WORD    (ret) size of returned structure
 02h    WORD    (call) structure version (0000h)
                (ret) actual structure version (0000h)
 04h    DWORD   number of sectors per cluster (with adjustment for compression)
 08h    DWORD   number of bytes per sector
 0Ch    DWORD   number of available clusters
 10h    DWORD   total number of clusters on the drive
 14h    DWORD   number of physical sectors available on the drive, without
                  adjustment for compression
 18h    DWORD   total number of physical sectors on the drive, without
                  adjustment for compression
 1Ch    DWORD   number of available allocation units, without adjustment
                  for compression
 20h    DWORD   total allocation units, without adjustment for compression
 24h  8 BYTEs   reserved
--------D-217304-----------------------------
INT 21 - Windows95 - FAT32 - Set DPB TO USE FOR FORMATTING
        AX = 7304h
        DL = drive number (00h=default, 01h=A:, etc.)
        ES:DI -> buffer for Set_DPBforFormat structure (see #01790)
Return: CF clear if successful
            ES:DI buffer updated
        CF set on error
            AX = error code
SeeAlso: AX=7302h,AX=7303h,AX=7305h

Format of Set_DPBforFormat structure:
Offset  Size    Description     (Table 01790)
 00h    WORD    (call) size
 02h    WORD    (call) structure version???  (0000h)
                (ret) ???
 04h    DWORD   (call) function number
                00h invalidate DPB counts
                01h rebuild DPB from BPB
                02h force media change (next access to drive rebuild DPB)
                03h get/set active FAT number and mirroring
                04h get/set root directory cluster number
---function 00h---
 08h    DWORD   new DPB free count (00000000h=no change, FFFFFFFFh=unknown)
 0Ch    DWORD   new DPB next-free (00000000h=no change, FFFFFFFFh=unknown)
 10h    DWORD   unused
 14h    DWORD   unused
---function 01h---
 08h    DWORD   unused???
 0Ch    DWORD   (call) -> BIOS Parameter Block from which to rebuild DPB
 10h    DWORD   unused
 14h    DWORD   unused
---function 02h---
 08h    DWORD   unused
 0Ch    DWORD   unused
 10h    DWORD   unused
 14h    DWORD   unused
---function 03h---
 08h    DWORD   (call) new active FAT/mirroring state, or FFFFFFFFh to get
                bits 3-0: the 0-based FAT number of the active FAT
                bits 6-4: reserved (0)
                bit 7: do not mirror active FAT to inactive FATs
 0Ch    DWORD   (ret) previous active FAT/mirroring state (as above)
 10h    DWORD   unused
 14h    DWORD   unused
---function 04h---
 08h    DWORD   (call) new root directory cluster number
                    FFFFFFFFh to get current
 0Ch    DWORD   (ret) previous root directory cluster number
 10h    DWORD   unused
 14h    DWORD   unused
--------D-217305CXFFFF-----------------------
INT 21 - Windows95 - FAT32 - EXTENDED ABSOLUTE DISK READ/WRITE
        AX = 7305h
        CX = FFFFh
        DL = drive number (01h=A:, etc.)
        SI = read/write mode flags (see #01791)
        DS:BX -> disk I/O packet (see #02548 at INT 25)
Return: CF clear if successful
        CF set on error
            AX = error code
Note:   one can not specify the default drive (DL=00h) for this function.
SeeAlso: AX=7302h,AX=7304h,INT 25,INT 26

Bitfields for Extended Absolute Disk Read/Write mode flags:
Bit(s)  Description     (Table 01791)
 0      direction (0=read, 1=write)
 12-1   reserved (0)
 14-13  write type (should be 00 on reads)
        00 unknown data
        01 FAT data
        10 directory data
        11 file data
 15     reserved (0)
--------v-217575-----------------------------
INT 21 - VIRUS - "LEGO" -INSTALLATION CHECK
        AX = 7575h
Return: AX = 4321h if resident
SeeAlso: AX=6969h,AH=76h"VIRUS"
--------v-2176-------------------------------
INT 21 - VIRUS - "Klaeren"/"Hate" - INSTALLATION CHECK
        AH = 76h
Return: AL = 48h if resident
SeeAlso: AX=7575h,AX=7700h"VIRUS"
--------v-217700-----------------------------
INT 21 - VIRUS - "Growing Block" - INSTALLATION CHECK
        AX = 7700h
Return: AX = 0920h if resident
SeeAlso: AH=76h,AX=7BCEh,AH=7Fh
--------V-217734-----------------------------
INT 21 U - SCROLLit v1.7 - INSTALLATION CHECK
        AX = 7734h
Return: DX = 3477h if installed
            AX = segment of resident code
Program: ScrollIt is a shareware backscroll utility by Bromfield Software
          Products
--------U-217761-----------------------------
INT 21 - WATCH.COM v3.2+ - INSTALLATION CHECK
        AX = 7761h ('wa')
Return: AX = 6177h
Note:   WATCH.COM is part of the "TSR" package by TurboPower Software
SeeAlso: INT 16/AX=7761h
--------v-217BCE-----------------------------
INT 21 - VIRUS - "Whisper"/"Taipan" - INSTALLATION CHECK
        AX = 7BCEh
Return: AX = 7BCEh if resident (???)
SeeAlso: AX=5454h"VIRUS",AX=7700h,AX=7BCFh,AH=7Fh"VIRUS"
--------v-217BCF-----------------------------
INT 21 - VIRUS - "Tai-Pan.666"/"Doom II Death" - INSTALLATION CHECK
        AX = 7BCFh
Return: AX = 7BCFh if resident
SeeAlso: AX=7BCEh"VIRUS",AH=7Dh"VIRUS"
--------v-217D-------------------------------
INT 21 - VIRUS - "OffSpring" - INSTALLATION CHECK
        AH = 7Dh
Return: AH = FAh if installed
SeeAlso: AX=7BCFh"VIRUS",AH=7Fh"VIRUS"
--------v-217F-------------------------------
INT 21 - VIRUS - "Squeaker","ASeXual" - INSTALLATION CHECK
        AH = 7Fh
Return: AH = 80h if resident
SeeAlso: AX=7BCEh,AH=83h"VIRUS"
--------D-2180-------------------------------
INT 21 - European MS-DOS 4.0 - "AEXEC" - EXECUTE PROGRAM IN BACKGROUND
        AH = 80h
        CX = mode
            0000h place child in zombie mode on exit to preserve exit code
            0001h discard child process and exit code on termination
        DS:DX -> ASCIZ full program name
        ES:BX -> parameter block (as for AX=4B00h)
Return: CF clear if successful
            AX = Command Subgroup ID (CSID)
        CF set on error
            AX = error code (see #01680 at AH=59h/BX=0000h)
Program: European MS-DOS 4.0 was written for Siemens in Germany and then used
          by several other European OEMs; its release falls between mainstream
          versions 3.2 and 3.3
Desc:   asynchronously execute a program, creating a new process for it
Notes:  this function is called by the DETACH command
        there is a system-wide limit of 32 processes
        the CSID is used to identify all processes that have been spawned by
          a given process, whether directly or indirectly
        programs to be run in the background must use the new executable format
          (see #01596 at AH=4Bh)
        background processes may only perform asynchronous (background) EXECs,
          either this function or AX=4B04h
        background processes may execute INT 11, INT 12, INT 21, INT 2A, and
          INT 2F at any time; they may execute INT 10 and INT 16 only while
          they have opened a popup screen via INT 2F/AX=1401h; no other
          interrupts may be executed from the background
        background processes may not use drive B: or overlay their code
          segments
        see AX=8700h for an installation check
        the "NE" new executable format made its first appearance in European
          MS-DOS 4.0
SeeAlso: AH=4Bh,AH=87h,INT 2F/AX=1400h"POPUP"
----------218080-----------------------------
INT 21 - PCW Weather Card interface - UNINSTALL PCW.COM AND FREE MEMORY
        AX = 8080h
Return: ???
SeeAlso: AX=7070h/BX=7070h
--------D-2181-------------------------------
INT 21 - European MS-DOS 4.0 - "FREEZE" - STOP A PROCESS
        AH = 81h
        BX = flag (00h freeze command subtree, 01h only specified process)
        CX = Process ID of head of command subtree
Return: CF clear if successful
        CF set on error
            AX = error code (no such process)
Desc:   temporarily suspend a process or a process and all of its children
Note:   if BX=0001h, this call will not return until the process is actually
          frozen, which may not be until after it unblocks from an I/O
          operation
SeeAlso: AH=82h,AH=89h,AX=8E00h,INT 15/AX=101Dh
--------D-2182-------------------------------
INT 21 - European MS-DOS 4.0 - "RESUME" - RESTART A PROCESS
        AH = 82h
        BX = flag (00h resume command subtree, 01h only specified process)
        CX = Process ID of head of command subtree
Return: CF clear if successful
        CF set on error
            AX = error code (no such process)
Desc:   restart a previously-suspended process or a process and all of its
          children
SeeAlso: AH=81h,INT 15/AX=101Eh
--------D-2183-------------------------------
INT 21 - European MS-DOS 4.0 - "PARTITION" - GET/SET FOREGROUND PARTITION SIZE
        AH = 83h
        AL = function
            00h get size
            01h set new size
                BX = new size in paragraphs
Return: CF clear if successful
            BX = current size (function 00h) or old size (function 01h)
        CF set on error
            AX = error code (01h,07h,0Dh)(see #01680 at AH=59h/BX=0000h)
Desc:   specify or determine how much memory may be allocated by the foreground
          process
Note:   if the partition size is set to 0000h, no partition management is done
          and all memory allocation is compatible with DOS 3.2.
        the partition size can be changed regardless of what use is being made
          of the changed memory; subsequent allocations will follow the
          partition rules (foreground processes may allocate only foreground
          memory; background processes allocate background memory first, then
          foreground memory)
SeeAlso: AH=48h,AH=4Ah
--------v-2183-------------------------------
INT 21 - VIRUS - "SVC" - INSTALLATION CHECK
        AH = 83h
Return: DX = 1990h if resident
SeeAlso: AH=76h,AH=84h"VIRUS"
--------v-2184-------------------------------
INT 21 - VIRUS - "SVC 5.0" or "SVC 6.0" - INSTALLATION CHECK
        AH = 84h
Return: DX = 1990h if resident
            BH = version number (major in high nybble, minor in low)
SeeAlso: AH=83h"VIRUS",AH=89h"VIRUS"
--------D-218400-----------------------------
INT 21 - European MS-DOS 4.0 - "CREATMEM" - CREATE A SHARED MEMORY AREA
        AX = 8400h
        BX = size in bytes (0000h = 65536)
        CX = flags
            bit 6: zero-initialize segment
        DS:DX -> ASCIZ name (must begin with "\SHAREMEM\")
Return: CF clear if successful
            AX = segment address of shared memory global object
        CF set on error
            AX = error code (06h,08h) (see #01680 at AH=59h/BX=0000h)
Desc:   create an area of memory which may be accessed by multiple processes
Notes:  shared memory objects are created as special files (thus the
          restriction on the name)
        on successful creation, the reference count is set to 1
SeeAlso: AX=8401h,AX=8402h,INT 15/AX=DE19h
--------D-218401-----------------------------
INT 21 - European MS-DOS 4.0 - "GETMEM" - OBTAIN ACCESS TO SHARED MEMORY AREA
        AX = 8401h
        CX = flags
            bit 7: writable segment (ignored by MS-DOS 4.0)
        DS:DX -> ASCIZ name (must begin with "\SHAREMEM\")
Return: CF clear if successful
            AX = segment address of shared memory global object
            CX = size in bytes
        CF set on error
            AX = error code (invalid name)
Desc:   get address of a previously-created area of memory which may be
          accessed by multiple processes
Note:   this call increments the reference count for the shared memory area
SeeAlso: AX=8400h,AX=8402h
--------D-218402-----------------------------
INT 21 - European MS-DOS 4.0 - "RELEASEMEM" - FREE SHARED MEMORY AREA
        AX = 8402h
        BX = handle (segment address of shared memory object)
Return: CF clear if successful
        CF set on error
            AX = error code (no such name)
Desc:   indicate that the specified area of shared memory will no longer be
          used by the caller
Note:   the reference count is decremented and the shared memory area is
          deallocated if the new reference count is zero
SeeAlso: AX=8400h,AX=8401h,INT 15/AX=DE19h
--------D-2185-------------------------------
INT 21 U - European MS-DOS 4.0 - ???
        AH = 85h
        ???
Return: ???
--------D-2186-------------------------------
INT 21 - European MS-DOS 4.0 - "SETFILETABLE" - INSTALL NEW FILE HANDLE TABLE
        AH = 86h
        BX = total number of file handles in new table
Return: CF clear if successful
        CF set on error
            AX = error code (06h,08h) (see #01680 at AH=59h/BX=0000h)
Desc:   adjust the size of the per-process open file table, thus raising or
          lowering the limit on the number of files the caller can open
          simultaneously
Notes:  any currently-open files are copied to the new table
        if the table is increased beyond the default 20 handles, only the
          first 20 will be inherited by child processes
        error 06h is returned if the requested number of handles exceeds
          system limits or would require closing currently-open files
SeeAlso: AH=26h,AH=67h
--------D-2187-------------------------------
INT 21 - European MS-DOS 4.0 - "GETPID" - GET PROCESS IDENTIFIER
        AH = 87h
Return: AX = PID
        BX = parent process's PID
        CX = Command Subgroup ID (CSID)
Program: European MS-DOS 4.0 was written for Siemens in Germany and then used
          by several other European OEMs; its release falls between mainstream
          versions 3.2 and 3.3
Desc:   determine an identifier by which to access the calling process
Notes:  called by MS C v5.1 getpid() function
        this function apparently must return AX=0001h for INT 21/AH=80h to
          succeed
        one possible check for European MS-DOS 4.0 is to issue this call with
          AL=00h and check whether AL is nonzero on return
SeeAlso: AH=30h,AH=62h,AH=80h
Index:  installation check;European MS-DOS 4.0
--------D-2188-------------------------------
INT 21 U - European MS-DOS 4.0 - ???
        AH = 88h
        ???
Return: ???
SeeAlso: AH=87h
--------D-2189-------------------------------
INT 21 - European MS-DOS 4.0 - SLEEP
        AH = 89h
        CX = time in milliseconds or 0000h to give up time slice
Return: CF clear if successful
            CX = 0000h
        CF set on error
            AX = error code (interrupted system call)
            CX = sleep time remaining
Desc:   suspend the calling process for the specified duration
Notes:  the sleep interval is rounded up to the next higher increment of the
          scheduler clock, and may be extended further if other processes are
          running
        this call may be interrupted by signals (see AH=8Dh)
        reportedly called by Microsoft C 4.0 startup code
        background processes have higher priority than the foreground process,
          and should thus periodically yield the CPU
SeeAlso: AH=81h,INT 15/AX=1000h,INT 2F/AX=1680h,INT 7A/BX=000Ah
--------v-2189-------------------------------
INT 21 - VIRUS - "Vriest" - INSTALLATION CHECK
        AH = 89h
Return: AX = 0123h if resident
SeeAlso: AH=84h"VIRUS",AH=90h"VIRUS"
--------D-218A-------------------------------
INT 21 - European MS-DOS 4.0 - "CWAIT" - WAIT FOR CHILD TO TERMINATE
        AH = 8Ah
        BL = range (00h command subtree, 01h any child)
        BH = suspend flag
            00h suspend if children exist but none are dead
            01h return if no dead children
        CX = Process ID of head of command subtree
Return: CF clear if successful
            AH = termination type (see #01792)
            AL = return code from child or aborting signal
            BX = PID of child (0000h if no dead children)
        CF set on error
            AX = error code (no child,interrupted system call)
Desc:   get return code from an asynchronously-executed child program,
          optionally waiting if no return code is available
SeeAlso: AH=4Bh,AH=4Dh,AH=80h,AH=8Dh

(Table 01792)
Values for termination type:
 00h    normal termination
 01h    aborted by Control-C
 02h    aborted by I/O error
 03h    terminate and stay resident
 04h    aborted by signal
 05h    aborted by program error
--------D-218B-------------------------------
INT 21 U - European MS-DOS 4.0 - ???
        AH = 8Bh
        ???
Return: ???
SeeAlso: AH=87h
--------D-218C-------------------------------
INT 21 - European MS-DOS 4.0 - SET SIGNAL HANDLER
        AH = 8Ch
        AL = signal number (see #01793)
        BL = action (see #01794)
        DS:DX -> signal handler (see #01795)
Return: CF clear if successful
            AL = previous action
            ES:BX -> previous signal handler
        CF set on error
            AX = error code (01h,invalid SigNumber or Action)
                  (see #01680 at AH=59h/BX=0000h)
Desc:   set the routine which will be invoked on a number of exceptional
          conditions
Note:   all signals will be sent to the most recently installed handler
SeeAlso: AH=8Dh

(Table 01793)
Values for European MS-DOS 4.0 signal number:
 01h    SIGINTR         Control-C or user defined interrupt key
 08h    SIGTERM         program termination
 09h    SIGPIPE         broken pipe
 0Dh    SIGUSER1        reserved for user definition
 0Eh    SIGUSER2        reserved for user definition

(Table 01794)
Values for signal action:
 00h    SIG_DFL         terminate process on receipt
 01h    SIG_IGN         ignore signal
 02h    SIG_GET         signal is accepted
 03h    SIG_ERR         sender gets error
 04h    SIG_ACK         acknowledge received signal and clear it, but don't
                          change current setting

(Table 01795)
Values signal handler is called with:
        AL = signal number (see #01793)
        AH = signal argument
Return: RETF, CF set: terminate process
        RETF, CF clear, ZF set: abort any interrupted system call with an error
        RETF, CF clear, ZF clear: restart any interrupted system call
        IRET: restart any interrupted system call
Note:   the signal handler may also perform a nonlocal GOTO by resetting the
          stack pointer and jumping; before doing so, it should dismiss the
          signal by calling this function with BL=04h
--------D-218D-------------------------------
INT 21 - European MS-DOS 4.0 - SEND SIGNAL
        AH = 8Dh
        AL = signal number (see #01793)
        BH = signal argument
        BL = action
            00h send to entire command subtree
            01h send only to specified process
        DX = Process ID
Return: CF clear if successful
        CF set on error
            AX = error code (01h,06h)(see #01680 at AH=59h/BX=0000h)
Desc:   invoke the exceptional-condition handler for the specified process
Note:   error 06h may be returned if one or more of the affected processes
          have an error handler for the signal
SeeAlso: AH=8Ch
--------D-218E00BH00-------------------------
INT 21 - European MS-DOS 4.0 - "SETPRI" - GET/SET PROCESS PRIORITY
        AX = 8E00h
        BH = 00h
        BL = action
            00h set priority for command subtree
            01h set priority for specified process only
        CX = Process ID
        DH = 00h
        DL = change in priority (00h to get priority)
Return: CF clear if successful
            DL = process priority
            DH destroyed
        CF set on error
            AX = error code (01h,no such process)(see #01680 at AH=59h)
Desc:   specify or determine the execution priority of the specified process
          or the process and all of its children
SeeAlso: AH=81h
--------D-218F-------------------------------
INT 21 U - European MS-DOS 4.0 - ???
        AH = 8Fh
        ???
Return: ???
SeeAlso: AH=87h
--------D-2190-------------------------------
INT 21 U - European MS-DOS 4.0 - ???
        AH = 90h
        ???
Return: ???
SeeAlso: AH=87h
--------v-2190-------------------------------
INT 21 - VIRUS - "Carioca" - INSTALLATION CHECK
        AH = 90h
Return: AH = 01h if resident
SeeAlso: AH=89h"VIRUS",AX=9753h"VIRUS"
--------D-2191-------------------------------
INT 21 U - European MS-DOS 4.0 - ???
        AH = 91h
        ???
Return: ???
SeeAlso: AH=87h
--------D-2192-------------------------------
INT 21 U - European MS-DOS 4.0 - ???
        AH = 92h
        ???
Return: ???
SeeAlso: AH=87h
--------D-2193-------------------------------
INT 21 - European MS-DOS 4.0 - "PIPE" - CREATE A NEW PIPE
        AH = 93h
        CX = size in bytes
Return: CF clear if successful
            AX = read handle
            BX = write handle
        CF set on error
            AX = error code (08h) (see #01680 at AH=59h/BX=0000h)
Desc:   create a communications channel which may be used for interprocess
          data and command exchanges
SeeAlso: AH=3Ch,AH=3Fh"DOS",AH=40h"DOS",AH=84h
--------D-2194-------------------------------
INT 21 U - European MS-DOS 4.0 - ???
        AH = 94h
        ???
Return: ???
SeeAlso: AH=87h
--------D-2195-------------------------------
INT 21 - European MS-DOS 4.0 - HARD ERROR PROCESSING
        AH = 95h
        AL = new state
           00h enabled
           01h disabled, automatically fail hard errors
Return: AX = previous setting
Desc:   specify whether hard (critical) errors should automatically fail the
          system call or invoke an INT 24
SeeAlso: INT 24
--------D-2196-------------------------------
INT 21 U - European MS-DOS 4.0 - ???
        AH = 96h
        ???
Return: ???
--------D-2197-------------------------------
INT 21 U - European MS-DOS 4.0 - ???
        AH = 97h
        ???
Return: ???
--------v-219753-----------------------------
INT 21 - VIRUS - "Nina" - INSTALLATION CHECK
        AX = 9753h
Return: never (executes original program) if virus resident
SeeAlso: AH=90h"VIRUS",AX=A1D5h"VIRUS",AX=9AD5h"VIRUS"
--------D-2198-------------------------------
INT 21 U - European MS-DOS 4.0 - ???
        AH = 98h
        ???
Return: ???
--------D-2199-------------------------------
INT 21 u - European MS-DOS 4.0 - "PBLOCK" - BLOCK A PROCESS
        AH = 99h
        DS:BX -> memory location to block on
        CX = timeout in milliseconds
        DH = nonzero if interruptable
Return: CF clear if awakened by event
            AX = 0000h
        CF set if unusual wakeup
            ZF set if timeout, clear if interrupted by signal
            AX = nonzero
Desc:   suspend calling process until another process sends a "restart" signal
          or a timeout occurs
SeeAlso: AH=9Ah,INT 2F/AX=0802h
--------D-219A-------------------------------
INT 21 u - European MS-DOS 4.0 - "PRUN" - UNBLOCK A PROCESS
        AH = 9Ah
        DS:BX -> memory location processes may have blocked on
Return: AX = number of processes awakened
        ZF set if no processes awakened
Program: European MS-DOS 4.0 was written for Siemens in Germany and then used
          by several other European OEMs; its release falls between mainstream
          versions 3.2 and 3.3
Desc:   restart all processes waiting for the specified "restart" signal
SeeAlso: AH=99h,INT 2F/AX=0802h
--------v-219AD5------------------------
INT 21 - VIRUS - "Massacre/Beavis" - INSTALLATION CHECK
        AX = 9AD5h
Return: AX = 9AD4h if resident
SeeAlso: AX=6969h"VIRUS",AX=A1D5h"VIRUS"
--------I-21A0-------------------------------
INT 21 - Attachmate Extra! - GET 3270 DISPLAY STATE
        AH = A0h
Return: AL = display status (see #01796)
        BX = host window status (see #01797)
Program: Attachmate Extra! is a 3270 emulator by Attachmate Corporation
SeeAlso: AH=A1h

Bitfields for Attachmate Extra! display status:
Bit(s)  Description     (Table 01796)
 7      0=windowed, 1=enlarged
 6-3    current screen profile number 0-9
 2-0    active window number (0=PC, 1-4=host B-E, 5-6=notepad F-G)

Bitfields for host window status:
Bit(s)  Description     (Table 01797)
 15     reserved
 14     0=host E window installed, 1=not
 13     0=host E terminal on, 1=off
 12     0=host E window displayed, 1=not
 11     reserved
 10     0=host D window installed, 1=not
 9      0=host D terminal on, 1=off
 8      0=host D window displayed, 1=not
 7      reserved
 6      0=host C window installed, 1=not
 5      0=host C terminal on, 1=off
 4      0=host C window displayed, 1=not
 3      reserved
 2      0=host B window installed, 1=not
 1      0=host B terminal on, 1=off
 0      0=host B window displayed, 1=not
--------I-21A1-------------------------------
INT 21 - Attachmate Extra! - SET 3270 DISPLAY STATE
        AH = A1h
        AL = new display status byte (see #01796)
SeeAlso: AH=A0h,AH=A2h
--------v-21A1D5-----------------------------
INT 21 - VIRUS - "789"/"Filehider" - INSTALLATION CHECK
        AX = A1D5h
Return: AX = 900Dh if resident
SeeAlso: AX=9753h,AX=9AD5h,AX=A55Ah
--------I-21A2-------------------------------
INT 21 - Attachmate Extra! - SET HOST WINDOW STATE
        AH = A2h
        AL = new host window status byte (see #01798)
SeeAlso: AH=A1h

Bitfields for Attachmate Extra! host window status:
Bit(s)  Description     (Table 01798)
 7      0=power off, 1=power on
 6      0=not installed, 1=installed
 5-3    reserved
 2-0    window number 1-4=host B-E
--------I-21A3-------------------------------
INT 21 - Attachmate Extra! - SEND KEYSTROKES TO HOST WINDOW
        AH = A3h
        AL = window number (1-4=host B-E)
        CX = 0001h
        DS:BX -> keystroke buffer
        DL = zero if keystroke buffer contains host function code (see #01799),
              non-zero if keystroke buffer contains ASCII character
Return: CX = zero if character sent, non-zero if not
        BX incremented if CX=0

(Table 01799)
Values for Attachmate Extra! host function code:
 00h=reserved   10h=PF16        20h=Clear       30h=SysReq
 01h=PF1        11h=PF17        21h=Print       31h=ErInp
 02h=PF2        12h=PF18        22h=Left        32h=ErEof
 03h=PF3        13h=PF19        23h=Right       33h=Ident
 04h=PF4        14h=PF20        24h=Up          34h=Test
 05h=PF5        15h=PF21        25h=Down        35h=Reset
 06h=PF6        16h=PF22        26h=Home        36h=DevCncl
 07h=PF7        17h=PF23        27h=Fast Left   37h=Dup
 08h=PF8        18h=PF24        28h=Fast Right  38h=FldMark
 09h=PF9        19h=Alt on      29h=Bksp        39h=Enter
 0Ah=PF10       1Ah=Alt off     2Ah=Insert      3Ah=CrSel
 0Bh=PF11       1Bh=Shift on    2Bh=Delete
 0Ch=PF12       1Ch=Shift off   2Ch=Backtab
 0Dh=PF13       1Dh=PA1         2Dh=Tab
 0Eh=PF14       1Eh=PA2         2Eh=Newline
 0Fh=PF15       1Fh=PA3         2Fh=Attn
--------I-21A4-------------------------------
INT 21 - Attachmate Extra! - GET HOST WINDOW BUFFER ADDRESS
        AH = A4h
        AL = window number (1-4=host B-E)
Return: DS:BX -> 3270 display buffer
SeeAlso: AH=A5h,AH=B8h
--------I-21A5-------------------------------
INT 21 - Attachmate Extra! - GET HOST WINDOW CURSOR POSITION
        AH = A5h
        AL = window number (1-4=host B-E)
Return: BX = cursor position (80 * row + column, where 0:0 is upper left)
Note:   if the host window is configured with the Extended Attribute (EAB)
          feature, multiply the cursor position by 2 to obtain the byte offset
          into the display buffer
SeeAlso: AH=A4h
--------v-21A55A-----------------------------
INT 21 - VIRUS - "Eddie-2" - INSTALLATION CHECK
        AX = A55Ah
Return: AX = 5AA5h if resident
SeeAlso: AX=A1D5h,AX=AA00h
--------v-21AA00-----------------------------
INT 21 - VIRUS - "Blinker" - INSTALLATION CHECK
        AX = AA00h
Return: AX = 00AAh if resident
SeeAlso: AX=A55Ah,AX=AA03h
--------v-21AA03-----------------------------
INT 21 - VIRUS - "Backtime" - INSTALLATION CHECK
        AX = AA03h
Return: AX = 03AAh if resident
SeeAlso: AX=AA00h,AH=ABh
--------v-21AB-------------------------------
INT 21 - VIRUS - "600" or "Voronezh"-family - INSTALLATION CHECK
        AH = ABh
Return: AX = 5555h if resident
SeeAlso: AX=AA03h,AX=ABCDh,AX=BBBBh"VIRUS"
--------v-21ABCD-----------------------------
INT 21 - VIRUS - Major BBS - INSTALLATION CHECK
        AX = ABCDh
Return: AX = 1234h if installed
SeeAlso: AH=ABh"VIRUS",AX=ABCDh"SuperVirus"
--------v-21ABCD------------------------
INT 21 - VIRUS - "SuperVirus 2" - INSTALLATION CHECK
        AX = ABCDh
Return: AX = DCBAh if resident
SeeAlso: AX=ABCDh"VIRUS",AX=BBBBh"VIRUS"
--------I-21AF-------------------------------
INT 21 - Attachmate Extra! - GET TRANSLATE TABLE ADDRESS
        AH = AFh
Return: DS:BX -> translate tables (see #01800)

Format of Attachmate Extra! translate tables:
Offset  Size    Description     (Table 01800)
 00h 256 BYTEs  ASCII to 3270 buffer code translate table
100h 256 BYTEs  3270 buffer code to ASCII translate table
200h 256 BYTEs  3270 buffer code to EBCDIC translate table
300h 256 BYTEs  EBCDIC to 3270 buffer code translate table
--------v-21B3-------------------------------
INT 21 - VIRUS - "Requires" - INSTALLATION CHECK
        AH = B3h
Return: AX = 9051h if resident
SeeAlso: AH=7Fh"VIRUS",AX=B974h"VIRUS"
--------N-21B300-----------------------------
INT 21 U - Novell NetWare - CHECK LIP/PACKET SIGNING/IPX CHECKSUM SUPPORT???
        AX = B300h
Return: AX = 0000h if supported???
Note:   this function appeared with the packet signing/Large Internet Packets/
          IPX Checksum-aware NetWare shells
SeeAlso: AX=B301h,AX=B302h
--------N-21B301-----------------------------
INT 21 U - Novell NetWare - CHECK SIGNATURE LEVEL???
        AX = B301h
Return: AX = 0000h if supported???
            BX:CX indicate signature level (see #01801)
Note:   this function appeared with the packet signing/Large Internet Packets/
          IPX Checksum-aware NetWare shells
SeeAlso: AX=B300h,AX=B304h,#02875 at INT 2F/AX=7A20h/BX=0000h

(Table 01801)
Values for signature level indicator:
 0000h:0000h = signature level 0
 0002h:0000h = signature level 1
 0202h:0000h = signature level 2
 0202h:0202h = signature level 3
--------N-21B302-----------------------------
INT 21 U - Novell NetWare - START PACKET SIGNING
        AX = B302h
        CX = server connection (1-8)
        DS:SI -> 24-byte buffer containing ???
Return: ???
Notes:  this function appeared with the packet signing/Large Internet Packets/
          IPX Checksum-aware NetWare shells
        if packet signing is active, this call is required if and only if the
          last call successfully authenticated the workstation to the server
SeeAlso: AX=B300h,#02875
--------N-21B304-----------------------------
INT 21 U - Novell NetWare - SET SIGNATURE LEVEL
        AX = B304h
        BX:CX = new signature level (see AX=B301h)
Return: ???
Note:   this function appeared with the packet signing/Large Internet Packets/
          IPX Checksum-aware NetWare shells
SeeAlso: AX=B300h,AX=B301h,AX=B306h,#02875
--------N-21B306-----------------------------
INT 21 - Novell NetWare - RENEGOTIATE SECURITY LEVEL
        AX = B306h
        CX = server connection number (01h-08h)
Return: ???
Note:   this function appeared with the packet signing/Large Internet Packets/
          IPX Checksum-aware NetWare shells
SeeAlso: AX=B300h,AX=B304h,#02875
--------N-21B4-------------------------------
INT 21 U - Novell NetWare - "AttachHandle"
        AH = B4h
        DS:SI -> input buffer (see #01802)
Return: AX = DOS file handle or return code
Note:   this is an interface provided by NetWare to give DOS file access to
          NetWare files on non-DOS systems such as Macintosh, OS/2, and Unix
SeeAlso: AX=E909h

Format of Novell NetWare input buffer:
Offset  Size    Description     (Table 01802)
 00h    BYTE    "WorkFileServer"
 01h    BYTE    access code
 02h    DWORD   "OpenHandle"
 06h    WORD    "OpenHandleCount"
 08h    DWORD   "OpenFileSize"
Note:   the six bytes at 02h-07h appear to be the six-byte NetWare handle
          returned by AX=E909h
--------N-21B500-----------------------------
INT 21 U - Novell NetWare - VNETWARE.386 API - GET INSTANCE DATA
        AX = B500h
Return: ES:BX -> data
        CX = length
SeeAlso: AX=B501h,AX=B502h
--------N-21B501-----------------------------
INT 21 U - Novell NetWare - VNETWARE.386 API - END VIRTUAL MACHINE
        AX = B501h
SeeAlso: AX=B500h,AX=B502h
--------N-21B502-----------------------------
INT 21 U - Novell NetWare - VNETWARE.386 API - START VIRTUAL MACHINE
        AX = B502h
SeeAlso: AX=B500h,AX=B501h
--------N-21B5-------------------------------
INT 21 - Novell NetWare shell 3.01 - TASK MODE CONTROL
        AH = B5h
        AL = subfunction
            03h get task mode
                Return: AH = 00h
                        AL = current task mode byte (see #01803)
            04h get task mode pointer
                Return: ES:BX -> task mode byte
Notes:  the task mode byte specifies how task cleanup should be performed, but
          is declared to be version-dependent
        allows a program to disable the automatic cleanup for programs managing
          task swapping, etc.

(Table 01803)
Values for NetWare task mode byte in version 3.01:
 00h-03h reserved
 04h     no task cleanup
--------N-21B505-----------------------------
INT 21 U - Novell NetWare - VNETWARE.386 API - SET VIRTUAL MACHINE ID
        AX = B505h
        ???
Return: ???
SeeAlso: AX=B502h,AX=B506h
--------N-21B506-----------------------------
INT 21 U - Novell NetWare - VNETWARE.386 API - GET VIRTUAL MACH SUPPORT LEVEL
        AX = B506h
Return: AX = ??? (0002h)
SeeAlso: AX=B505h
--------N-21B507-----------------------------
INT 21 - Novell NetWare - NetWare Shell - GET NUMBER OF PACKET BURST BUFFERS
        AX = B507h
Return: AL = number of packet burst buffers (configured at shell load time)
--------N-21B6-------------------------------
INT 21 - Novell NetWare - FILE SERVICES - EXTENDED FILE ATTRIBUTES
        AH = B6h
        AL = subfunction
            00h get extended file attributes
            01h set extended file attributes
                CL = extended file attributes (see #01804)
        DS:DX -> ASCIZ pathname (max 255 bytes)
Return: CF set on error
            AL = error code
                8Ch caller lacks privileges
                FEh not permitted to search directory
                FFh file not found
        CF clear if successful
            AL = 00h (success)
            CL = current extended file attributes (see #01804)
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: AX=4300h,AH=E3h/SF=0Fh

Bitfields for NetWare extended file attributes:
Bit(s)  Description     (Table 01804)
 2-0    search mode (executables only)
        000 none (use shell's default search)
        001 search on all opens without path
        010 do not search
        011 search on read-only opens without path
        100 reserved
        101 search on all opens
        110 reserved
        111 search on all read-only opens
 3      reserved
 4      transactions on file tracked
 5      file's FAT indexed
 6      read audit (to be implemented)
 7      write audit (to be implemented)
--------N-21B7-------------------------------
INT 21 U - Novell NetWare - "HoldFileModeSet" (obsolete)
        AH = B7h
        AL = new value for HoldFileFlag
Return: AL = previous value of HoldFileFlag
Note:   this function provided backward compatibility with a bug in early
          DOS versions and CP/M, but is no longer used or supported
--------I-21B8-------------------------------
INT 21 - Attachmate Extra! - DISABLE HOST BUFFER UPDATES
        AH = B8h
        AL = window number (1-4=host B-E)
        DL = 01h
Notes:  only valid in CUT mode
        next AID keystroke (eg Enter) enables host buffer updates
SeeAlso: AH=A4h
--------N-21B800-----------------------------
INT 21 - Novell NetWare - PRINT SERVICES - GET DEFAULT CAPTURE FLAGS
        AX = B800h
        CX = size of reply buffer (01h-3Fh)
        ES:BX -> reply buffer for capture flags table (see #01805)
Return: AL = status
            00h successful
Note:   this function is supported by Advanced NetWare 2.0+
SeeAlso: AX=B801h,AX=B802h,AH=DFh/DL=00h,AH=DFh/DL=04h

Format of NetWare capture flags table:
Offset  Size    Description     (Table 01805)
 00h    BYTE    status (used internally, should be set to 00h)
 01h    BYTE    print flags (see #01806)
 02h    BYTE    tab size (01h-12h, default 08h)
 03h    BYTE    printer number on server (00h-04h, default 00h)
 04h    BYTE    number of copies to print (00h-FFh, default 01h)
 05h    BYTE    form type required in printer (default 00h)
 06h    BYTE    reserved
 07h 13 BYTEs   text to be placed on banner page
 14h    BYTE    reserved
 15h    BYTE    default local printer (00h = LPT1)
 16h    WORD    (big-endian) timeout in clock ticks for flushing capture file
                  on inactivity, or 0000h to disable timeout
 18h    BYTE    flush capture file on LPT close if nonzero
 19h    WORD    (big-endian) maximum lines per page
 1Bh    WORD    (big-endian) maximum characters per line
 1Dh 13 BYTEs   name of form required in printer
 2Ah    BYTE    LPT capture flag
                00h inactive, FFh LPT device is being captured
 2Bh    BYTE    file capture flag
                00h if no file specified, FFh if capturing to file
 2Ch    BYTE    timing out (00h if no timeout in effect, FFh if timeout counter
                  running)
 2Dh    DWORD   (big-endian) address of printer setup string
 31h    DWORD   (big-endian) address of printer reset string
 35h    BYTE    target connection ID
 36h    BYTE    capture in progress if FFh
 37h    BYTE    job queued for printing if FFh
 38h    BYTE    print job valid if FFh
 39h    DWORD   bindery object ID of print queue if previous byte FFh
 3Dh    WORD    (big-endian) print job number (1-999)

Bitfields for NetWare print flags:
Bit(s)  Description     (Table 01806)
 2      print capture file if interrupted by loss of connection
 3      no automatic form feed after print job
 6      printing control sequences interpreted by print service
 7      print banner page before capture file
--------N-21B801-----------------------------
INT 21 - Novell NetWare - PRINT SERVICES - SET DEFAULT CAPTURE FLAGS
        AX = B801h
        CX = size of buffer (01h-3Fh)
        ES:BX -> buffer containing capture flags table (see #01805)
Return: AL = status
            00h successful
Note:   this function is supported by Advanced NetWare 2.0+
SeeAlso: AX=B800h,AX=B803h,AH=DFh/DL=00h,AH=DFh/DL=04h
--------N-21B802-----------------------------
INT 21 - Novell NetWare - PRINT SERVICES - GET SPECIFIC CAPTURE FLAGS
        AX = B802h
        CX = size of reply buffer (01h-3Fh)
        DH = LPT port (00h-02h)
        ES:BX -> reply buffer for capture flags table (see #01805)
Return: AL = status
            00h successful
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: AX=B800h,AX=B803h,AH=DFh/DL=00h,AH=DFh/DL=04h
--------N-21B803-----------------------------
INT 21 - Novell NetWare - PRINT SERVICES - SET SPECIFIC CAPTURE FLAGS
        AX = B803h
        CX = size of buffer (01h-3Fh)
        DH = LPT port (00h-02h)
        ES:BX -> buffer containing capture flags table (see #01805)
Return: AL = status
            00h successful
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: AX=B800h,AX=B803h,AH=DFh/DL=00h,AH=DFh/DL=04h
--------N-21B804-----------------------------
INT 21 - Novell NetWare - PRINT SERVICES - GET DEFAULT LOCAL PRINTER
        AX = B804h
Return: DH = default LPT port (00h-02h)
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: AX=B800h,AX=B805h,AH=DFh/DL=00h
--------N-21B805-----------------------------
INT 21 - Novell NetWare - PRINT SERVICES - SET DEFAULT LOCAL PRINTER
        AX = B805h
        DH = new default LPT port (00h-02h)
Return: AL = status
            00h successful
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: AX=B800h,AX=B804h,AH=DFh/DL=00h
--------N-21B806-----------------------------
INT 21 - Novell NetWare - PRINT SERVICES - SET CAPTURE PRINT QUEUE
        AX = B806h
        DH = LPT port (00h-02h)
        BX:CX = print queue's object ID
Return: AL = status
            00h successful
            FFh job already set
Desc:   specify the print queue on which a print job is to be placed the next
          time a capture is started on the given printer port
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: AX=B801h,AX=B807h,AH=E0h/SF=09h
--------N-21B807-----------------------------
INT 21 - Novell NetWare - PRINT SERVICES - SET CAPTURE PRINT JOB
        AX = B807h
        DH = LPT port (00h-02h)
        BX = job number (see AH=E3h/SF=68h)
        SI:DI:CX = NetWare file handle (see AH=E3h/SF=68h)
Return: AL = status
            00h successful
            FFh job already queued
Desc:   specify the capture file and print job to be used for subsequent
          output to the given printer port
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: AX=B801h,AX=B806h,AH=E0h/SF=09h,AH=E3h/SF=68h
--------N-21B808-----------------------------
INT 21 - Novell NetWare - PRINT SERVICES - GET BANNER USER NAME
        AX = B808h
        ES:BX -> 12-byte buffer for user name
Return: AL = status
            00h successful
Desc:   get the user name which is printed on the banner page
Notes:  this function is supported by Advanced NetWare 2.1+
        the default name is the login name of the user
SeeAlso: AX=B809h
--------N-21B809-----------------------------
INT 21 - Novell NetWare - PRINT SERVICES - SET BANNER USER NAME
        AX = B809h
        ES:BX -> 12-byte buffer containing user name
Return: AL = status
            00h successful
Desc:   specify the user name which is printed on the banner page
Notes:  this function is supported by Advanced NetWare 2.1+
        the default name is the login name of the user
SeeAlso: AX=B808h
--------N-21B9-------------------------------
INT 21 U - Novell NetWare - "SpecialAttachableFunction"
        AH = B9h
        AL = FFh to hook this function
            ES:BX -> function to invoke on AH=B9h when AL<>FFh
Note:   this function is no longer used or supported by current versions of
          NetWare
--------v-21B974-----------------------------
INT 21 - VIRUS - "Tracker" - INSTALLATION CHECK
        AX = B974h
Return: AX = 2888h if resident
SeeAlso: AH=B3h"VIRUS",AH=D0h"VIRUS"
--------N-21BA-------------------------------
INT 21 U - Novell NetWare - "ReturnCommandComPointers"
        AH = BAh
Return: DX = environment segment
        ES:DI -> COMMAND.COM drive
Desc:   used to edit the COMSPEC and PATH variables in the master environment
          when mapping network drives
Note:   this function was documented in older Novell documents which are no
          longer available
--------N-21BB-------------------------------
INT 21 - Novell NetWare - WORKSTATION - SET END OF JOB STATUS
        AH = BBh
        AL = new EOJ flag
            00h disable EOJs
            01h enable EOJs
Return: AL = old EOJ flag
Desc:   specify whether the network shell should automatically generate an
          End of Job call when the root command processor regains control
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=19h,AH=D6h
--------v-21BBBB-----------------------------
INT 21 - VIRUS - "Hey You" - INSTALLATION CHECK
        AX = BBBBh
Return: AX = 6969h
SeeAlso: AH=ABh"VIRUS",AH=BEh"VIRUS"
--------N-21BC-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - LOG PHYSICAL RECORD
        AH = BCh
        AL = flags (see #01808)
        BX = file handle
        CX:DX = starting offset in file
        SI:DI = length of region to lock
        BP = timeout in timer ticks (1/18 sec)
                0000h = don't wait if already locked
Return: AL = status (see #01807)
Desc:   add the specified physical record to the log table, optionally locking
          it
Note:   this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=5Ch,AH=BDh,AH=BEh,AH=BFh,AH=C2h,AH=D0h

(Table 01807)
Values for NetWare status:
 00h    successful
 96h    no dynamic memory for file
 FEh    timed out
 FFh    failed

Bitfields for NetWare flags:
Bit(s)  Description     (Table 01808)
 0      lock as well as log record
 1      non-exclusive lock
--------N-21BD-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - RELEASE PHYSICAL RECORD
        AH = BDh
        BX = file handle
        CX:DX = starting offset in file
        SI:DI = length of record
Return: AL = status
            00h successful
            FFh record not locked
Desc:   unlock the specified physical record but do not remove it from log
          table
Note:   this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=BCh,AH=BEh"NetWare",AH=C0h,AH=C3h,AH=D2h
--------N-21BE-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - CLEAR PHYSICAL RECORD
        AH = BEh
        BX = file handle
        CX:DX = starting offset within file
        SI:DI = record length in bytes
Return: AL = status
            00h successful
            FFh specified record not locked
Desc:   unlock the physical record and remove it from the log table
Note:   this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=5Ch,AH=BCh,AH=BDh,AH=C1h,AH=C4h,AH=D4h
--------v-21BE-------------------------------
INT 21 - VIRUS - "Datalock" - INSTALLATION CHECK
        AH = BEh
Return: AX = 1234h if resident
SeeAlso: AX=BBBBh,AX=BE00h
--------v-21BE00-----------------------------
INT 21 - VIRUS - "USSR-1049" - INSTALLATION CHECK
        AX = BE00h
        CF set
Return: CF clear if resident
SeeAlso: AH=BEh"VIRUS",AH=C0h"VIRUS"
--------N-21BF-------------------------------
INT 21 O - Novell NetWare, Alloy NTNX - LOG/LOCK RECORD (FCB)
        AH = BFh
        AL = flags (see #01808)
        DS:DX -> opened FCB (see #01345 at AH=0Fh)
        BX:CX = offset
        BP = lock timeout in timer ticks (1/18 sec) if AL nonzero
        SI:DI = length
Return: AL = error code (see #01807)
Note:   this function was added in NetWare 4.6, but was removed some time prior
          to Advanced NetWare 2.15, and is no longer listed in current Novell
          documentation
SeeAlso: AH=BCh,AH=C0h"NetWare",AH=C2h"NetWare"
--------N-21C0-------------------------------
INT 21 O - Novell NetWare, Alloy NTNX - RELEASE RECORD (FCB)
        AH = C0h
        DS:DX -> non-extended FCB (see #01345 at AH=0Fh)
        BX:CX = offset
Return: AL = error code (see #01807)
Notes:  unlocks record but does not remove it from log table
        this function was added in NetWare 4.6, but was removed some time prior
          to Advanced NetWare 2.15, and is no longer listed in current Novell
          documentation
SeeAlso: AH=BDh,AH=BFh,AH=C1h"NetWare",AH=C3h
--------v-21C0-------------------------------
INT 21 - VIRUS - "Slow"/"Zerotime", "Solano" - INSTALLATION CHECK
        AH = C0h
Return: AX = 0300h if "Slow"/"Zerotime" resident
        AX = 1234h if "Solano" resident
SeeAlso: AX=BE00h,AX=C000h"VIRUS",AX=C301h"VIRUS"
--------v-21C000-----------------------------
INT 21 - VIRUS - "QUICKY" - INSTALLATION CHECK
        AX = C000h
        BX = most files infected by any other infected file
Return: AX = 76F3h if resident
SeeAlso: AH=C0h"VIRUS",AX=C001h,AX=C002h,AH=C1h"VIRUS"
--------v-21C001-----------------------------
INT 21 - VIRUS - "QUICKY" - TURN INFECTION OFF
        AX = C001h
Return: nothing
Note:   if the virus is already memory resident this call disables any
          further infections
SeeAlso: AX=C000h,AX=C002h
--------v-21C002-----------------------------
INT 21 - VIRUS - "QUICKY" - TURN INFECTION ON
        AX = C002h
Return: nothing
Note:   if the virus is already memory resident and infection is disabled,
          this call re-enables it
SeeAlso: AX=C000h,AX=C001h
--------N-21C1-------------------------------
INT 21 O - Novell NetWare, Alloy NTNX - CLEAR RECORD (FCB)
        AH = C1h
        DS:DX -> opened FCB (see #01345 at AH=0Fh)
        BX:CX = offset
Return: AL = error code (see #01807)
Note:   unlocks record and removes it from log table
        this function was added in NetWare 4.6, but was removed some time prior
          to Advanced NetWare, and is no longer listed in current Novell
          documentation
SeeAlso: AH=BEh,AH=C0h"NetWare",AH=C4h
--------v-21C1-------------------------------
INT 21 - VIRUS - "Solano" - ???
        AH = C1h
        ???
Return: ???
SeeAlso: AH=C0h"VIRUS"
--------N-21C2-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - LOCK PHYSICAL RECORD SET
        AH = C2h
        AL = flags
            bit 1: non-exclusive lock
        BP = lock timeout in timer ticks (1/18 sec) 0000h = no wait
Return: AL = status
            00h successful
            FEh timed out
            FFh failed
Desc:   attempt to lock all physical records listed in the log table
Notes:  this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
          Alloy NTNX
        status FFh will be returned if one or more physical records have been
          exclusively locked by another process
SeeAlso: AH=BFh,AH=C3h,AH=D1h
--------v-21C2-------------------------------
INT 21 - VIRUS - "Scott's Valley" - ???
        AH = C2h
        ???
Return: ???
SeeAlso: AH=C0h"VIRUS"
--------N-21C3-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - RELEASE PHYS RECORD SET
        AH = C3h
Desc:   unlock all currently-locked physical records in the log table, but do
          not remove them from the table
Note:   this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=BDh,AH=C0h,AH=C2h"NetWare",AH=C4h,AH=D3h
--------v-21C301DXF1F1-----------------------
INT 21 - VIRUS - "905"/"Backfont" - INSTALLATION CHECK
        AX = C301h
        DX = F1F1h
Return: DX = 0E0Eh if resident
SeeAlso: AH=C0h"VIRUS",AX=C500h"VIRUS"
--------N-21C4-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - CLEAR PHYSICAL RECORD SET
        AH = C4h
Desc:   unlock all physical records in the log table and remove them from the
          log table
Note:   this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=BEh,AH=C1h,AH=D5h
--------N-21C500-----------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - OPEN SEMAPHORE
        AX = C500h
        DS:DX -> semaphore name (counted string, max 127 bytes)
        CL = initial value for semaphore
Return: AL = status
            00h successful
                BL = number of processes having semaphore open
                CX:DX = semaphore handle
            03h name length greater than 127
                (refer to Novell document FYI.A.4611)
            FEh invalid name length
            FFh invalid semaphore value
Notes:  this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
          Alloy NTNX
        the semaphore's value is incremented by AX=C503h and decremented by
          AX=C502h
SeeAlso: AX=C501h,AX=C502h,AX=C503h,AX=C504h,AX=F220h/SF=00h
--------v-21C500-----------------------------
INT 21 - VIRUS - "Sverdlov" - INSTALLATION CHECK
        AX = C500h
Return: AX = 6731h if resident
SeeAlso: AX=C301h"VIRUS",AH=C6h"VIRUS"
--------N-21C501-----------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - EXAMINE SEMAPHORE
        AX = C501h
        CX:DX = semaphore handle
Return: AL = status
            00h successful
                CX = semaphore value (-127 to 127)
                DL = count of processes which have the semaphore open
            FFh invalid handle
Note:   this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AX=C500h"NetWare",AX=C502h,AX=C504h,AX=F220h/SF=01h
--------N-21C502-----------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - WAIT ON SEMAPHORE
        AX = C502h
        CX:DX = semaphore handle
        BP = timeout limit in timer ticks (1/18 sec)
                0000h return immediately if semaphore already zero or negative
Return: AL = status
            00h successful
            FEh timeout
            FFh invalid handle
Desc:   decrement the semaphore's value, optionally waiting until its value
          becomes positive before decrementing
Note:   this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AX=C500h"NetWare",AX=C501h,AX=C503h,AX=F220h/SF=02h
--------N-21C503-----------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - SIGNAL SEMAPHORE
        AX = C503h
        CX:DX = semaphore handle
Return: AL = status
            00h successful
            01h semaphore value overflowed
            FFh invalid handle
Desc:   increment the semaphore's value and signal the first process (if any)
          in the queue waiting on the semaphore
Note:   this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AX=C500h"NetWare",AX=C502h,AX=F220h/SF=03h
--------N-21C504-----------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - CLOSE SEMAPHORE
        AX = C504h
        CX:DX = semaphore handle
Return: AL = status
            00h successful
            FFh invalid handle
Desc:   decrement the semaphore's open count, and delete the semaphore if the
          count reaches zero
Note:   this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AX=C500h"NetWare",AX=C501h,AX=F220h/SF=04h
--------N-21C6-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - GET OR SET LOCK MODE
        AH = C6h
        AL = subfunction
            00h set old "compatibility" mode (default)
            01h set new extended locks mode
            02h get lock mode
Return: AL = current lock mode
Note:   this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
          Alloy NTNX
        the locking mode should be 01h for NetWare 4.61+ and Advanced
          NetWare 1.0+ locking calls, and 00h for all older calls
SeeAlso: AH=BCh,AH=C4h,AH=D0h
--------v-21C6-------------------------------
INT 21 - VIRUS - "Socha" - INSTALLATION CHECK
        AH = C6h
Return: AL = 55h if resident
SeeAlso: AX=C500h"VIRUS",AX=C603h
--------v-21C603-----------------------------
INT 21 - VIRUS - "Yankee Doodle" or "MLTI" - INSTALLATION CHECK
        AX = C603h
        BX = version number (002Ch or 002Dh)
        CF set
Return: CF clear if resident
        ZF set if resident and input BX matches version
SeeAlso: AX=C500h"VIRUS",AX=C700h"VIRUS"
--------N-21C700-----------------------------
INT 21 - Novell NetWare - TRANSACTION TRACKING SYSTEM - BEGIN TRANSACTION
        AX = C700h
Return: CF clear if successful
            AL = 00h
        CF set on error
            AL = error code
                96h out of memory
                FEh implicit transaction already active, converted to explicit
                FFh explicit transaction already active
Note:   this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
SeeAlso: AX=C701h,AX=C702h,AX=C703h,AX=F222h/SF=01h
--------v-21C700-----------------------------
INT 21 - VIRUS - "MH-757" - INSTALLATION CHECK
        AX = C700h
Return: AL = 07h if resident
SeeAlso: AX=C603h"VIRUS",AH=CBh"VIRUS"
--------N-21C701-----------------------------
INT 21 - Novell NetWare - TRANSACTION TRACKING SYSTEM - END TRANSACTION
        AX = C701h
Return: AL = status (00h,FDh-FFh) (see #01809)
            00h successful
                CX:DX = transaction number
        CF clear except when AL=FFh
Note:   this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
SeeAlso: AX=C700h"NetWare",AX=C703h,AX=F222h/SF=02h

(Table 01809)
Values for NetWare TTS status:
 00h    successful
 FDh    transaction tracking disabled
 FEh    transaction ended records locked
 FFh    no explicit transaction active
--------N-21C702-----------------------------
INT 21 - Novell NetWare - TRANSACTION TRACKING SYSTEM - INSTALLATION CHECK
        AX = C702h
Return: AL = status
            00h not available
            01h available
            FDh available but disabled
Desc:   determine whether the default file server supports TTS
Note:   this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
SeeAlso: AX=C700h,AX=C701h,AX=C703h,AX=F222h/SF=00h
--------N-21C703-----------------------------
INT 21 - Novell NetWare - TRANSACTION TRACKING SYSTEM - ABORT TRANSACTION
        AX = C703h
Return: CF clear if successful
            AL = 00h
        CF set on error
            AL = error code (FDh-FFh) (see #01809)
Note:   this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
SeeAlso: AX=C700h"NetWare",AX=C701h,AX=C704h,AX=F222h/SF=03h
--------N-21C704-----------------------------
INT 21 - Novell NetWare - TRANSACTION TRACKING SYSTEM - TRANSACTION STATUS
        AX = C704h
        CX:DX = transaction number (see AX=C701h)
Return: AL = status
            00h successful
            FFh not yet written to disk
Desc:   verify that a transaction has actually been written to disk
Notes:  this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
        transactions are written to disk in the order in which they are ended,
          but it may take as much as five seconds for the data to be written
SeeAlso: AX=C700h"NetWare",AX=C701h,AX=C703h,AX=F222h/SF=04h
--------N-21C705-----------------------------
INT 21 - Novell NetWare - TRANSACTION TRACKING SYSTEM - GET APPLICTN THRESHOLDS
        AX = C705h
Return: AL = status
            00h successful
        CL = maximum logical record locks (default 0)
        CH = maximum physical record locks (default 0)
Desc:   get the per-application limits on record locks allowed before an
          implicit transaction is begun
Notes:  this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
        if either limit is FFh, implicit transactions are disabled for the
          corresponding lock type
SeeAlso: AX=C706h,AX=C707h,AX=F222h/SF=05h
--------N-21C706-----------------------------
INT 21 - Novell NetWare - TRANSACTION TRACKING SYSTEM - SET APPLICTN THRESHOLDS
        AX = C706h
        CL = maximum logical record locks (default 0)
        CH = maximum physical record locks (default 0)
Return: AL = status
            00h successful
Desc:   specify the per-application limits on record locks allowed before an
          implicit transaction is begun
Notes:  this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
        if either limit is set to FFh, implicit transactions are disabled for
          the corresponding lock type
SeeAlso: AX=C705h,AX=C708h,AX=F222h/SF=06h
--------N-21C707-----------------------------
INT 21 - Novell NetWare - TRANSACTION TRACKING SYSTEM - GET WORKSTN THRESHOLDS
        AX = C707h
Return: AL = status
            00h successful
        CL = maximum logical record locks (default 0)
        CH = maximum physical record locks (default 0)
Desc:   get the per-workstation limits on record locks allowed before an
          implicit transaction is begun
Notes:  this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
        if either limit is FFh, implicit transactions are disabled for the
          corresponding lock type
SeeAlso: AX=C705h,AX=C708h,AX=F222h/SF=07h
--------N-21C708-----------------------------
INT 21 - Novell NetWare - TRANSACTION TRACKING SYSTEM - SET WORKSTN THRESHOLDS
        AX = C708h
        CL = maximum logical record locks (default 0)
        CH = maximum physical record locks (default 0)
Return: AL = status
            00h successful
Desc:   specify the per-workstation limits on record locks allowed before an
          implicit transaction is begun
Notes:  this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
        if either limit is set to FFh, implicit transactions are disabled for
          the corresponding lock type
SeeAlso: AX=C706h,AX=C707h,AX=F222h/SF=08h
--------N-21C8-------------------------------
INT 21 O - Novell NetWare - BEGIN LOGICAL FILE LOCKING
        AH = C8h
        if function C6h lock mode 00h:
            DL = mode
                00h no wait
                01h wait
        if function C6h lock mode 01h:
            BP = timeout in timer ticks (1/18 sec)
Return: AL = error code
Desc:   used to provide TTS support for applications which are not aware of
          Novell's Transaction Tracking System
Note:   this function was added in NetWare 4.0, but was removed some time prior
          to Advanced NetWare 2.15, and is no longer listed in current Novell
          documentation
SeeAlso: AH=C9h
--------N-21C9-------------------------------
INT 21 O - Novell NetWare - END LOGICAL FILE LOCKING
        AH = C9h
Return: AL = error code
Desc:   used to provide TTS support for applications which are not aware of
          Novell's Transaction Tracking System
Note:   this function was added in NetWare 4.0, but was removed some time prior
          to Advanced NetWare 2.15, and is no longer listed in current Novell
          documentation
SeeAlso: AH=C8h
--------N-21CA-------------------------------
INT 21 O - Novell NetWare, Alloy NTNX - LOG/LOCK PERSONAL FILE (FCB)
        AH = CAh
        DS:DX -> FCB (see #01345 at AH=0Fh)
        if function C6h lock mode 01h:
            AL = log and lock flag
                00h log file only
                01h lock as well as log file
            BP = lock timeout in timer ticks (1/18 sec)
Return: AL = error code
            00h successful
            96h no dynamic memory for file
            FEh timeout
            FFh failed
Desc:   provides file locking support for FCBs
Note:   this function was added in NetWare 4.0, but was removed some time prior
          to Advanced NetWare 2.15, and is no longer listed in current Novell
          documentation
SeeAlso: AH=CBh
--------v-21CA15-----------------------------
INT 21 - VIRUS - "Piter" - ???
        AX = CA15h
        ???
Return: ???
SeeAlso: AH=CCh"VIRUS"
--------N-21CB-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - LOCK FILE SET
        AH = CBh
        if function C6h lock mode 00h:
            DL = mode (00h no wait, 01h wait)
        if function C6h lock mode 01h:
            BP = lock timeout in timer ticks (1/18 sec), 0000h = no wait
Return: AL = status (00h,FEh,FFh) (see #01810)
Desc:   attempt to lock all files listed in the log table
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
        status FFh will be returned if one or more of the files have already
          been exclusively locked by another process
SeeAlso: AH=CAh,AH=CDh,AH=D1h,AH=EBh

(Table 01810)
Values for NetWare status:
 00h    successful
 FEh    timed out
 FFh    failed
--------v-21CB-------------------------------
INT 21 - VIRUS - "Milous" - INSTALLATION CHECK
        AH = CBh
Return: AL = 07h if resident
SeeAlso: AX=C700h"VIRUS",AX=CB02h
--------v-21CB02-----------------------------
INT 21 - VIRUS - "Witcode" - INSTALLATION CHECK
        AX = CB02h
Return: AX = 02CBh if resident
SeeAlso: AH=CBh"VIRUS",AH=CCh"VIRUS"
--------N-21CC-------------------------------
INT 21 O - Novell NetWare, Alloy NTNX - RELEASE FILE (FCB)
        AH = CCh
        DS:DX -> FCB (see #01345 at AH=0Fh)
Return: none
Desc:   unlocks file, but does not remove it from the log table or close it
Note:   this function was added in NetWare 4.0, but was removed some time prior
          to Advanced NetWare 2.15, and is no longer listed in current Novell
          documentation
SeeAlso: AH=CAh,AH=CDh
--------v-21CC-------------------------------
INT 21 - VIRUS - "Westwood" - INSTALLATION CHECK
        AH = CCh
Return: AX = 0700h if resident
SeeAlso: AX=CB02h,AH=CDh"VIRUS",AX=D000h"VIRUS"
--------N-21CD-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - RELEASE FILE SET
        AH = CDh
Return: none
Desc:   unlock all files listed in the log table, but don't remove them from
          the table
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=CBh,AH=CCh,AH=CFh,AH=D3h
--------v-21CD-------------------------------
INT 21 - VIRUS - "Westwood" - ???
        AH = CDh
        ???
Return: ???
SeeAlso: AH=CCh"VIRUS"
--------N-21CE-------------------------------
INT 21 O - Novell NetWare, Alloy NTNX - CLEAR FILE (FCB)
        AH = CEh
        DS:DX -> FCB (see #01345 at AH=0Fh)
Return: AL = error code
Desc:   unlocks file and removes it from log table, then closes all opened and
          logged occurrences
Note:   this function was added in NetWare 4.0, but was removed some time prior
          to Advanced NetWare 2.15, and is no longer listed in current Novell
          documentation
SeeAlso: AH=CAh,AH=CFh,AH=EDh"NetWare"
--------N-21CF-------------------------------
INT 21 - LANstep - ???
        AH = CFh
        ???
Return: ???
Program: LANstep is a redesign of the Waterloo Microsystems PORT network
--------N-21CF-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - CLEAR FILE SET
        AH = CFh
Return: AL = 00h
Desc:   unlock and remove all files from log table
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=CAh,AH=CEh,AH=EBh"NetWare"
--------N-21D0-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - LOG LOGICAL RECORD
        AH = D0h
        DS:DX -> record string (counted string, max 99 data bytes)
        if function C6h lock mode 01h: (Novell, NTNX only)
            AL = flags
                bit 0: lock as well as log the record
                bit 1: non-exclusive lock
            BP = lock timeout in timer ticks (1/18 sec)
Return: AL = status
            00h successful
            96h no dynamic memory for file
            FEh timed out
            FFh unsuccessful
Desc:   add the specified logical record name to the log table, and optionally
          lock the record
Notes:  this function is supported by NetWare 4.6+, Advanced NetWare 1.0+,
          Banyan VINES, and Alloy NTNX
        locks on logical record names are advisory and may be ignored by other
          applications
SeeAlso: AH=BCh,AH=D1h,AH=D2h,AH=D4h,AH=EBh
--------v-21D0-------------------------------
INT 21 - VIRUS - "MALAGA" - INSTALLATION CHECK
        AH = D0h
Return: AX = 00D0h if resident
SeeAlso: AH=B3h"VIRUS",AH=D0h"ANTIARJ",AX=D000h"VIRUS"
--------v-21D0-----------------------------
INT 21 - VIRUS - "ANTIARJ" -INSTALLATION CHECK
        AH = D0h
Return: AH = D1h if resident
SeeAlso: AH=D0h"MALAGA"
--------v-21D000-----------------------------
INT 21 - VIRUS - "Fellowship" - INSTALLATION CHECK
        AX = D000h
Return: BX = 1234h if resident
SeeAlso: AH=CCh"VIRUS",AH=D0h"ANTIARJ",AX=D000h"Warlock",AH=D5h"VIRUS",AX=D5AAh
--------v-21D000-----------------------------
INT 21 - VIRUS - "Warlock" - INSTALLATION CHECK
        AX = D000h
        CF clear
Return: CF set if resident (normal DOS return would be CF clear)
SeeAlso: AX=D000h"VIRUS",AH=D5h"VIRUS"
--------N-21D1-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - LOCK LOGICAL RECORD SET
        AH = D1h
        AL = lock type (00h exclusive, 01h shareable)
        if function C6h lock mode 00h:
            DL = mode (00h no wait, 01h wait)
        if function C6h lock mode 01h: (Novell only)
            BP = lock timeout in timer ticks (1/18 sec), 0000h no wait
Return: AL = status (see #01810)
Desc:   attempt to lock all logical record names listed in the log table
Notes:  this function is supported by NetWare 4.6+, Advanced NetWare 1.0+,
          Banyan VINES, and Alloy NTNX
        status FFh will be returned if one or more logical records have been
          exclusively locked by another process
        locks on logical record names are advisory and may be ignored by other
          applications
SeeAlso: AH=C2h,AH=CBh,AH=D0h,AH=D3h,AH=D5h
--------N-21D2-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - RELEASE LOGICAL RECORD
        AH = D2h
        DS:DX -> semaphore identifier (counted string up to 99 chars long)
Return: AL = status
            00h successful
            FFh no such record
Desc:   unlock the logical record name but do not remove it from the log table
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+,
          Banyan VINES, and Alloy NTNX
        locks on logical record names are advisory and may be ignored by other
          applications
SeeAlso: AH=BDh,AH=D0h,AH=D3h,AH=D4h
--------v-21D2-------------------------------
INT 21 - VIRUS???
        AH = D2h
        ???
Return: ???
Note:   this call is intercepted by the Search&Destroy SDRes v27.03 bundled
          with Novell DOS 7, and is presumably some virus's installation check
SeeAlso: AH=4Ah/BX=00B6h
--------N-21D3-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - RELEASE LOGICAL RECORD SET
        AH = D3h
Desc:   unlock all currently-locked logical record names in the log table, but
          do not remove them from the table
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+,
          Banyan VINES, and Alloy NTNX
        locks on logical record names are advisory and may be ignored by other
          applications
SeeAlso: AH=C3h,AH=CDh,AH=D1h,AH=D2h,AH=D5h
--------N-21D4-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - CLEAR LOGICAL RECORD
        AH = D4h
        DS:DX -> logical record name (counted string up to 99 chars long)
Return: AL = status (00h,FFh) (see #01811)
Desc:   unlock and remove the logical record name from the log table
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+,
          Banyan VINES, and Alloy NTNX
        locks on logical record names are advisory and may be ignored by other
          applications
SeeAlso: AH=BEh,AH=D0h,AH=D2h,AH=D5h

(Table 01811)
Values for NetWare status:
 00h    successful
 FFh    no such record name
--------N-21D5-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - CLEAR LOGICAL RECORD SET
        AH = D5h
Return: AL = error code (00h,FFh) (see #01811)
Desc:   unlock and remove all logical record name from the log table
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+,
          Banyan VINES, and Alloy NTNX
        locks on logical record names are advisory and may be ignored by other
          applications
SeeAlso: AH=D1h,AH=D3h,AH=D4h
--------v-21D5-------------------------------
INT 21 - VIRUS - "Carfield" - ???
        AH = D5h
        ???
Return: ???
SeeAlso: AX=D5AAh,AH=F3h"Carfield"
--------v-21D5AA-----------------------------
INT 21 - VIRUS - "Diamond-A", "Diamond-B" - INSTALLATION CHECK
        AX = D5AAh
Return: AX = 2A55h if "Diamond-A" resident
        AX = 2A03h if "Diamond-B"-family virus resident
SeeAlso: AX=D000h,AH=D5h"VIRUS",AX=D5AAh/BP=DEAAh
--------v-21D5AABPDEAA-----------------------
INT 21 - VIRUS - "Dir" - INSTALLATION CHECK
        AX = D5AAh
        BP = DEAAh
Return: SI = 4321h if resident
SeeAlso: AX=D5AAh,AX=DADAh"VIRUS"
--------N-21D6-------------------------------
INT 21 - Novell NetWare - WORKSTATION - END OF JOB
        AH = D6h
        BX = job flag (0000h current job, FFFFh all processes on workstation)
Return: AL = error code
Desc:   unlocks and clears all locked or logged files and records held by the
          process(es), closes all files, resets error and lock modes, and
          releases all network resources
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=BBh"NetWare",AH=D7h
--------N-21D7-------------------------------
INT 21 - Novell NetWare - CONNECTION SERVICES - SYSTEM LOGOUT
        AH = D7h
Return: AL = error code
Desc:   this function closes the caller's open files, logs it out from all
          file servers, detaches the workstation from all non-default file
          servers, and maps a drive to the default server's SYS:LOGIN directory
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=D6h,AH=E3h/SF=14h,AH=F1h"NetWare"
--------N-21D8-------------------------------
INT 21 - Novell NetWare, Banyan VINES - ALLOCATE RESOURCE
        AH = D8h
        DL = resource number
Return: AL = status (00h successful, FFh unsucessful)
Note:   this function is no longer used or supported by NetWare, and is not
          documented in Novell documents
SeeAlso: AH=D9h
--------N-21D9-------------------------------
INT 21 - Novell NetWare, Banyan VINES - DEALLOCATE RESOURCE
        AH = D9h
        DL = resource number
Return: AL = status (00h successful, FFh unsucessful)
Note:   this function is no longer used or supported by NetWare, and is not
          documented in Novell documents
SeeAlso: AH=D8h
--------N-21DA-------------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - GET VOLUME INFO WITH NUMBER
        AH = DAh
        DL = volume number
        ES:DI -> reply buffer (see #01812)
Return: AL = 00h
Notes:  this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
        operator console rights are not required to make this call
        reported total blocks and total unused blocks include the Hot Fix
          Table; the NetWare shell's implementation of INT 21/AH=36h will
          report values larger than 268MB as 268MB.
SeeAlso: AH=36h,AH=E2h/SF=15h,AH=E3h/SF=E9h

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01812)
 00h    WORD    sectors/block
 02h    WORD    total blocks on volume
 04h    WORD    unused blocks
 06h    WORD    total directory entries
 08h    WORD    unused directory entries
 0Ah 16 BYTEs   volume name, null padded
 1Ah    WORD    removable flag, 0000h = not removable
Note:   all words are big-endian
--------v-21DADA-----------------------------
INT 21 - VIRUS - "Gotcha" - INSTALLATION CHECK
        AX = DADAh
Return: AH = A5h
SeeAlso: AX=D5AAh,AX=DAFEh"VIRUS"
--------v-21DAFE-----------------------------
INT 21 - VIRUS - "Plovdiv 1.3" - INSTALLATION CHECK
        AX = DAFEh
Return: AX = 1234h if resident
SeeAlso: AX=DADAh,AH=DDh"VIRUS",AH=DEh"VIRUS"
--------N-21DB-------------------------------
INT 21 - Novell NetWare - WORKSTATION - GET NUMBER OF LOCAL DRIVES
        AH = DBh
Return: AL = number of local disks as set by LASTDRIVE in CONFIG.SYS
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=0Eh
--------N-21DC-------------------------------
INT 21 - Novell NetWare - CONNECTION SERVICES - GET CONNECTION NUMBER
        AH = DCh
Return: AL = logical connection number
            00h if NetWare not loaded or this machine is a non-dedicated server
        CX = station number in ASCII (CL = first digit)
Notes:  this function is supported by NetWare 4.0+, Banyan VINES, and Alloy
          NTNX
        station number only unique for those PCs connected to same semaphore
          service
SeeAlso: AH=F2h"NetWare"
--------d-21DC-------------------------------
INT 21 - PCMag PCMANAGE/DCOMPRES - TURN ON/OFF
        AH = DCh
        DX = state
            0000h turn on
            0001h turn off
SeeAlso: AX=FEDCh
--------v-21DC28-----------------------------
INT 21 - VIRUS - "Monika" - INSTALLATION CHECK
        AX = DC28h
Return: AX = 1973h if resident
SeeAlso: AX=D000h"VIRUS",AX=DCBAh"VIRUS"
--------v-21DCBA-----------------------------
INT 21 - VIRUS - "Red Spider" - INSTALLATION CHECK
        AX = DCBAh
Return: AX = ABCDh if resident
SeeAlso: AX=DC28h"VIRUS",AX=DEFEh"VIRUS"
--------N-21DD-------------------------------
INT 21 - Novell NetWare - WORKSTATION - SET NetWare ERROR MODE
        AH = DDh
        DL = error mode
            00h invoke INT 24 on critical I/O errors (default)
            01h return NetWare extended error code in AL
            02h return error code in AL, mapped to standard DOS error codes
Return: AL = previous error mode
Note:   this function is supported by Advanced NetWare 2.0+
SeeAlso: INT 24
--------v-21DD-------------------------------
INT 21 - VIRUS - "Jerusalem"-family - RELOCATE VIRUS???
        AH = DDh
        CX = number of bytes to copy
        DS:SI -> source of copy
        ES:DI -> destination of copy
Return: does not return normally; return address is caller's CS:0100h with
          AX = ???
SeeAlso: AX=DDEFh,AH=E0h"VIRUS",AH=EEh"VIRUS"
--------v-21DDEF------------------------
INT 21 - VIRUS- "GOLGI" - INSTALLATION CHECK
        AX = DDEFh
Return: AX = EFDDh if resident
SeeAlso: AH=DDh"VIRUS",AH=DEh"VIRUS"
--------v-21DE-------------------------------
INT 21 - VIRUS - "Durban" - INSTALLATION CHECK
        AH = DEh
Return: AH = DFh if resident
SeeAlso: AX=DAFEh,AX=DDEFh,AH=DEh"April 1st",AX=DEADh"90210"
--------v-21DE-------------------------------
INT 21 - VIRUS - "April 1st EXE" - ???
        AH = DEh
        ???
Return: ???
SeeAlso: AH=DEh"Durban",AX=DEADh"90210"
--------N-21DE-------------------------------
INT 21 - Novell NetWare - MESSAGE SERVICES - SET BROADCAST MODE
        AH = DEh
        DL = broadcast mode
            00h receive server and workstation broadcasts (default)
            01h receive server broadcasts, discard user messages
            02h store server broadcasts for retrieval
            03h store all broadcasts for retrieval
Return: AL = new broadcast mode
Note:   this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
--------N-21DE--DL04-------------------------
INT 21 - Novell NetWare - MESSAGE SERVICES - GET BROADCAST MODE
        AH = DEh
        DL = 04h
Return: AL = current broadcast mode
            00h receive server and workstation broadcasts (default)
            01h receive server broadcasts, discard user message
            02h store server broadcasts for retrieval
            03h store all broadcasts for retrieval
Note:   this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
--------N-21DE-------------------------------
INT 21 - Novell NetWare - SHELL TIMER INTERRUPT CHECKS
        AH = DEh
        DL = function
            05h disable shell timer interrupt checks
            06h enable shell timer interrupt checks
Return: ???
Note:   this function was added in NetWare 4.0, but is not listed in current
          Novell documentation and is probably no longer supported
--------v-21DEAD------------------------
INT 21 - VIRUS - "90210" - INSTALLATION CHECK
        AX = DEADh
Return: AX = AAAAh if resident
SeeAlso: AH=DEh"April 1st",AX=DEADh"Shifting",AX=DEDEh"VIRUS"
--------v-21DEAD------------------------
INT 21 - VIRUS - "Shifting Objective" - RELOCATE CODE ???
        AX = DEADh
SeeAlso: AX=FEADh
SeeAlso: AX=DEADh"90210",AX=DEDEh"VIRUS"
--------v-21DEDE-----------------------------
INT 21 - VIRUS - "Brothers" - INSTALLATION CHECK
        AX = DEDEh
Return: AH = 41h if resident
SeeAlso: AX=DEADh"Shifting",AX=DEFEh"VIRUS"
--------v-21DEFE-----------------------------
INT 21 - VIRUS - "Maze" - INSTALLATION CHECK
        AX = DEFEh
Return: AX = ABCDh if resident
SeeAlso: AX=DCBAh"VIRUS",AX=DEDEh"VIRUS",AH=E0h"VIRUS"
--------N-21DF--DL00-------------------------
INT 21 - Novell NetWare - PRINT SERVICES - START LPT CAPTURE
        AH = DFh
        DL = 00h
Return: AL = status
            00h successful
Desc:   this function redirects the default LPT to a capture file on the file
          server
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX; under NTNX, it sends a print break (see INT 17/AH=84h)
        a print job is queued when the first character of output is captured
SeeAlso: AX=B800h,AX=B804h,AH=DFh/DL=01h,AH=DFh/DL=02h,AH=DFh/DL=03h
SeeAlso: AH=DFh/DL=04h,AX=F003h
--------N-21DF--DL01-------------------------
INT 21 - Novell NetWare - PRINT SERVICES - END LPT CAPTURE
        AH = DFh
        DL = 01h
Return: AL = status
            00h successful
Desc:   stop redirecting the default LPT, close the capture file, and release
          the job in the print queue for printing
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX; under NTNX, it sends a print break (see INT 17/AH=84h)
        after this call, the default LPT defaults to local printing
SeeAlso: AH=DFh/DL=00h,AH=DFh/DL=02h,AH=DFh/DL=03h,AH=DFh/DL=05h
--------N-21DF--DL02-------------------------
INT 21 - Novell NetWare - PRINT SERVICES - CANCEL LPT CAPTURE
        AH = DFh
        DL = 02h
Return: AL = status
            00h successful
Desc:   this function ends the capture of the default LPT, removes the job from
          the print queue, and deletes the capture file unless it is a
          permanent capture file
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX; under NTNX, it sends a print break (see INT 17/AH=84h)
        after this call, the default LPT defaults to local printing
SeeAlso: AH=DFh/DL=00h,AH=DFh/DL=06h
--------N-21DF--DL03-------------------------
INT 21 - Novell NetWare - PRINT SERVICES - FLUSH LPT CAPTURE
        AH = DFh
        DL = 03h
Return: AL = status
            00h successful
Desc:   this function closes the current capture file for the default LPT
          and starts printing it if it is not a permanent capture file
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX; under NTNX, it sends a print break (see INT 17/AH=84h)
        if more data is sent to the LPT port after this call, a new capture
          file will be opeend
SeeAlso: AH=DFh/DL=00h,AH=DFh/DL=01h,AH=DFh/DL=02h,AH=DFh/DL=07h
--------N-21DF--DL04-------------------------
INT 21 - Novell NetWare - PRINT SERVICES - START SPECIFIC LPT CAPTURE
        AH = DFh
        DL = 04h
        DH = LPT port (00h-02h)
Return: AL = status
            00h successful
Desc:   this function redirects the specified LPT to a capture file on the file
          server
Notes:  this function is supported by Advanced NetWare 2.1+
        a print job is queued when the first character of output is captured
SeeAlso: AX=B800h,AH=DFh/DL=00h,AH=DFh/DL=05h,AH=DFh/DL=06h,AH=DFh/DL=07h
SeeAlso: AX=F003h
--------N-21DF--DL05-------------------------
INT 21 - Novell NetWare - PRINT SERVICES - END SPECIFIC LPT CAPTURE
        AH = DFh
        DL = 05h
        DH = LPT port (00h-02h)
Return: AL = status
            00h successful
Desc:   stop redirecting the specified LPT, close the capture file, and release
          the job in the print queue for printing
Notes:  this function is supported by Advanced NetWare 2.1+
        after this call, the specified LPT defaults to local printing
SeeAlso: AH=DFh/DL=01h,AH=DFh/DL=04h,AH=DFh/DL=06h,AH=DFh/DL=07h
--------N-21DF--DL06-------------------------
INT 21 - Novell NetWare - PRINT SERVICES - CANCEL SPECIFIC LPT CAPTURE
        AH = DFh
        DL = 06h
        DH = LPT port (00h-02h)
Return: AL = status
            00h successful
Desc:   this function ends the capture of the specified LPT, removes the job
          from the print queue, and deletes the capture file unless it is a
          permanent capture file
Notes:  this function is supported by Advanced NetWare 2.1+
        after this call, the specified LPT defaults to local printing
SeeAlso: AH=DFh/DL=02h,AH=DFh/DL=04h,AH=DFh/DL=05h,AH=DFh/DL=07h
--------N-21DF--DL07-------------------------
INT 21 - Novell NetWare - PRINT SERVICES - FLUSH SPECIFIC LPT CAPTURE
        AH = DFh
        DL = 07h
        DH = LPT port (00h-02h)
Return: AL = status
            00h successful
Desc:   this function closes the current capture file for the specified LPT
          and starts printing it if it is not a permanent capture file
Notes:  this function is supported by Advanced NetWare 2.1+
        if more data is sent to the LPT port after this call, a new capture
          file will be opeend
SeeAlso: AH=DFh/DL=03h,AH=DFh/DL=04h,AH=DFh/DL=05h,AH=DFh/DL=06h
--------T-21DF00DX534C-----------------------
INT 21 U - Software Carousel - INSTALLATION CHECK
        AX = DF00h
        DX = 534Ch ("SL")
        DI = 534Ch ("SL")
Return: AX = 00FFh if installed
            ???
Program: Software Carousel is a task switcher by SoftLogic Solutions, Inc.
--------T-21DF01-----------------------------
INT 21 - Software Carousel - SWITCH TO ANOTHER TASK
        AX = DF01h
        BL = task number (00h = next task)
Return: AL = status
            00h Carousel not running
            01h successful
            FFh unsucessful
                AH = error code (01h,02h) (see #01813)

(Table 01813)
Values for Software Carousel error code:
 00h    invalid subfunction in AL
 01h    invalid task number
 02h    tried to switch to task with no memory size
 03h    tried to kill program in partition with no program running
 04h    tried to change size of an active memory partition
 05h    invalid memory size
 06h    tried to send command to task with a pending previous command
--------T-21DF02-----------------------------
INT 21 - Software Carousel - KILL PROGRAM IN MEMORY PARTITION
        AX = DF02h
        BL = task number
Return: AL = status
            00h Carousel not running
            01h successful
            FFh unsucessful
                AH = error code (01h,03h) (see #01813)
--------T-21DF03-----------------------------
INT 21 - Software Carousel - GET PARTITION SIZE AND PROGRAM STATUS
        AX = DF03h
        BL = task number
Return: AL = status
            00h Carousel not running
            01h successful
                BL = partition state (00h no program running, 01h prog running)
                DX = partition size in KB
            FFh unsucessful
                AH = error code (01h) (see #01813)
SeeAlso: AX=DF05h
--------T-21DF04-----------------------------
INT 21 - Software Carousel - GET PARTITION NAME
        AX = DF04h
        BL = task number
Return: AL = status
            00h Carousel not running
            01h successful
                CX = length of name (00h if default partition name)
                ES:BX -> partition name (if CX nonzero)
            FFh unsucessful
                AH = error code (01h) (see #01813)
SeeAlso: AX=DF06h
--------T-21DF05-----------------------------
INT 21 - Software Carousel - CHANGE PARTITION SIZE
        AX = DF05h
        BL = task number
        DX = new size in KB
Return: AL = status
            00h Carousel not running
            01h successful
            FFh unsucessful
                AH = error code (01h,04h,05h) (see #01813)
        BX = minimum size allowed
        CX = maximum size available
SeeAlso: AX=DF03h
--------T-21DF06-----------------------------
INT 21 - Software Carousel - CHANGE PARTITION NAME
        AX = DF06h
        BL = task number
        CX = length of new name (00h to use default, max 18h)
        DS:SI -> new name
Return: AL = status
            00h Carousel not running
            01h successful
            FFh unsucessful
                AH = error code (01h) (see #01813)
SeeAlso: AX=DF04h
--------T-21DF07-----------------------------
INT 21 - Software Carousel - SEND COMMAND TO MEMORY SECTION
        AX = DF07h
        BL = task number
        CX = length of command (max 8 chars)
        DS:SI -> command line
Return: AL = status
            00h Carousel not running
            01h successful
            FFh unsucessful
                AH = error code (01h,06h) (see #01813)
Note:   the maximum length seems too small and may be a typo for 80 characters
--------T-21DF08-----------------------------
INT 21 - Software Carousel - SELECTIVELY ENABLE/DISABLE MENU AND SWITCHING
        AX = DF08h
        BL = new state of keyboard (00h disabled, 01h enabled)
Return: AL = status
            00h Carousel not running
            01h successful
Program: Software Carousel is a task switcher by SoftLogic Solutions, Inc.
Note:   when the keyboard is is disabled, the user may neither access the
          Carousel menu nor switch to another memory section
--------T-21DF09-----------------------------
INT 21 - Software Carousel - BOOT THE SYSTEM
        AX = DF09h
Return: AL = status
            00h Carousel not running
            FFh unsucessful
                AH = error code (01h,03h) (see #01813)
Note:   this function never returns if successful
--------T-21DF0A-----------------------------
INT 21 - Software Carousel - GET MEMORY SIZE/PARTITION NUMBER OF CURRENT TASK
        AX = DF0Ah
Return: AL = status
            00h Carousel not running
            01h successful
                BL = task number
                DX = memory size in KB
            FFh unsucessful
                AH = error code (01h,03h) (see #01813)
--------T-21DF0B-----------------------------
INT 21 - Software Carousel - SET TASK SWITCH CALLBACK
        AX = DF0Bh
        BH = interrupt number or 00h
        BL = function number to invoke on partition switch
        CL = function number to call when it is safe for resident programs
                to perform DOS calls
        DS:DX -> FAR function to call if BH=00h
Return: AL = status
            00h Carousel not running
            01h successful
            FFh unsucessful
                AH = error code (01h,03h) (see #01813)
Notes:  the specified interrupt or FAR function is called with AH set to the
          appropriate one of the values specified in BL and CL, and BL set to
          the new task number
        the function specified by CL will not be called until the notification
          is enabled with AX=DF0Ch
SeeAlso: AX=DF0Ch
--------T-21DF0C-----------------------------
INT 21 - Software Carousel - ENABLE DOS-CALL SAFETY NOTIFICATION
        AX = DF0Ch
Return: AL = status
            00h Carousel not running
            01h successful
Program: Software Carousel is a task switcher by SoftLogic Solutions, Inc.
SeeAlso: AX=DF0Bh
--------O-21E0-------------------------------
INT 21 - Digital Research DOS Plus - CALL BDOS
        AH = E0h
        CL = BDOS function number (see #04019 at INT E0"CP/M-86")
        other registers as appropriate for function
Return: as appropriate for function
SeeAlso: AX=4459h,INT E0"CP/M-86"
--------E-21E0-------------------------------
INT 21 - OS/286, OS/386 - INITIALIZE REAL PROCEDURE
        AH = E0h
        ???
Return: ???
SeeAlso: AH=E1h"OS/286"
--------T-21E0-------------------------------
INT 21 - DoubleDOS - MENU CONTROL
        AH = E0h
        AL = subfunction
            01h exchange tasks
            73h resume invisible job if suspended
            74h kill other job
            75h suspend invisible job
Note:   identical to AH=F0h
SeeAlso: AH=F0h"DoubleDOS"
--------v-21E0-------------------------------
INT 21 - VIRUS - "Jerusalem", "Armagedon" - INSTALLATION CHECK
        AH = E0h
Return: AX = 0300h if "Jerusalem" resident
        AX = DADAh if "Armagedon" resident
SeeAlso: AH=DEh"VIRUS",AX=DEDEh"VIRUS",AX=E00Fh
--------N-21E0-------------------------------
INT 21 - Novell NetWare, Alloy NTNX - PRINT SPOOLING
        AH = E0h
        DS:SI -> request buffer (see #01814)
        ES:DI -> reply buffer
Return: AL = status
Note:   this function was added in NetWare 4.0, but is no longer listed in
          current Novell documentation and may no longer be supported
SeeAlso: AH=E3h/SF=68h,AX=F211h/SF=06h,AX=F211h/SF=0Ah

Format of NetWare print spooling request buffer:
Offset  Size    Description     (Table 01814)
 00h    WORD    length of following data
 02h    BYTE    subfunction
                00h spool data to a capture file
                01h close and queue capture file
                02h set spool flags
                03h spool existing file
                04h get spool queue entry
                05h remove entry from spool queue
 03h    ???
SeeAlso: #02101
--------N-21E0--SF06-------------------------
INT 21 - Novell NetWare - PRINT SERVICES - GET PRINTER STATUS
        AH = E0h subfn 06h
        DS:SI -> request buffer (see #01815)
        ES:DI -> reply buffer (see #01816)
Return: AL = status
            00h successful
            FFh no such printer
Desc:   get current state of specified printer attached to the server
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX

Format of NetWare "Get Printer Status" request buffer:
Offset  Size    Description     (Table 01815)
 00h    WORD    0002h (length of following data)
 02h    BYTE    06h (subfunction "Get Printer Status")
 03h    BYTE    printer number (00h-04h)
SeeAlso: #01816

Format of NetWare "Get Printer Status" reply buffer:
Offset  Size    Description     (Table 01816)
 00h    WORD    (call) 0004h (size of following results buffer)
 02h    BYTE    flag: 00h printer active, FFh printer halted
 03h    BYTE    flag: 00h printer online, 01h printer offline
 04h    BYTE    current form type
 05h    BYTE    target printer number (00h-04h)
                same as number in request buffer unless rerouted by server
                  console
SeeAlso: #01815
--------N-21E0--SF09-------------------------
INT 21 - Novell NetWare - PRINT SERVICES - SPECIFY CAPTURE FILE
        AH = E0h subfn 09h
        DS:SI -> request buffer (see #01817)
        ES:DI -> reply buffer (see #01818)
Return: AL = status
            00h successful
            9Ch invalid path
Desc:   create a permanent capture file for the next print capture to be
          started
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
        the caller must have read, write, and create rights for the directory
          containing the capture file

Format of NetWare "Specify Capture File" request buffer:
Offset  Size    Description     (Table 01817)
 00h    WORD    length of following data (max 102h)
 02h    BYTE    09h (subfunction "Specify Capture File")
 03h    BYTE    directory handle or 00h
 04h    BYTE    length of filename
 05h  N BYTEs   name of capture file
SeeAlso: #01818

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01818)
 00h    WORD    (call) 0000h (no results returned)
SeeAlso: #01817
--------v-21E00F-----------------------------
INT 21 - VIRUS - "8-tunes" - INSTALLATION CHECK
        AX = E00Fh
Return: AX = 4C31h if resident
SeeAlso: AH=E0h"VIRUS",AH=E1h"VIRUS"
--------E-21E1-------------------------------
INT 21 - OS/286, OS/386 - ISSUE REAL PROCEDURE CALL
        AH = E1h
        ???
Return: ???
Note:   protected mode only???
SeeAlso: AH=E0h"OS/286",AH=E2h"OS/286",AH=E3h"OS/286",AX=250Eh,INT 31/AX=0301h
--------T-21E1-------------------------------
INT 21 - DoubleDOS - CLEAR KEYBOARD BUFFER FOR CURRENT JOB
        AH = E1h
SeeAlso: AH=E2h"DoubleDOS",AH=E3h"DoubleDOS",AH=E8h"DoubleDOS"
SeeAlso: AH=F1h"DoubleDOS"
--------v-21E1-------------------------------
INT 21 - VIRUS - "Mendoza", "Fu Manchu" - INSTALLATION CHECK
        AH = E1h
Return: AX = 0300h if "Mendoza" resident
        AX = 0400h if "Fu Manchu" resident
SeeAlso: AX=E00Fh,AH=E4h"VIRUS"
--------N-21E1--SF00-------------------------
INT 21 - Novell NetWare - MESSAGE SERVICES - SEND BROADCAST MESSAGE
        AH = E1h subfn 00h
        DS:SI -> request buffer (see #01819)
        ES:DI -> reply buffer (see #01820)
Return: AL = status
            00h successful
            FEh I/O error or out of dynamic workspace
Note:   this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
SeeAlso: AH=DEh"NetWare",AH=DEh/DL=04h,AH=E1h/SF=01h,AH=E1h/SF=04h
SeeAlso: AH=E1h/SF=09h

Format of NetWare "Send Broadcast Message" request buffer:
Offset  Size    Description     (Table 01819)
 00h    WORD    length of following data (max 9Eh)
 02h    BYTE    00h (subfunction "Send Broadcast Message")
 03h    BYTE    number of connections (01h-64h)
 04h  N BYTEs   list of connections to receive broadcast message
        BYTE    length of message (01h-37h)
      N BYTEs   broadcast message (no control characters or characters > 7Eh)
SeeAlso: #01820

Format of NetWare "Send Broadcast Message" reply buffer:
Offset  Size    Description     (Table 01820)
 00h    WORD    (call) size of following results buffer (max 65h)
 02h    BYTE    number of connections
 03h  N BYTEs   list of per-connection results
                00h successful
                FCh message rejected due to lack of buffer space
                FDh invalid connection number
                FFh blocked (see also AH=E1h/SF=02h)
SeeAlso: #01819
--------N-21E1--SF01-------------------------
INT 21 - Novell NetWare - MESSAGE SERVICES - GET BROADCAST MESSAGE (OLD)
        AH = E1h subfn 01h
        DS:SI -> request buffer (see #01821)
        ES:DI -> reply buffer (see #01822)
Return: AL = status
            00h successful
            FCh full message queue
            FEh out of dynamic workspace
Note:   this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
SeeAlso: AH=DEh/DL=04h,AH=E1h/SF=00h,AH=E1h/SF=05h,AH=E1h/SF=09h
SeeAlso: AX=F215h/SF=01h,AX=F215h/SF=0Bh

Format of NetWare "Get Broadcast Message" request buffer:
Offset  Size    Description     (Table 01821)
 00h    WORD    0001h (length of following data)
 02h    BYTE    01h (subfunction "Get Broadcast Message")
SeeAlso: #01822,#02109

Format of NetWare "Get Broadcast Message" reply buffer:
Offset  Size    Description     (Table 01822)
 00h    WORD    (call) size of following results buffer (max 38h)
 02h    BYTE    length of message (00h-37h)
                00h if no broadcast messages pending
 03h  N BYTEs   message (no control characters or characters > 7Eh)
SeeAlso: #01821,#02107,#02110
--------N-21E1--SF02-------------------------
INT 21 - Novell NetWare - MESSAGE SERVICES - DISABLE BROADCAST MESSAGES
        AH = E1h subfn 02h
        DS:SI -> request buffer (see #01824)
        ES:DI -> reply buffer (see #01825)
Return: AL = error code
Note:   these functions are supported by NetWare 4.0+ but are not listed in
          _NetWare_System_Calls--DOS_; they may be obsolete
SeeAlso: AH=E1h/SF=00h,AH=E1h/SF=03h,AH=E1h/SF=04h,AH=E1h/SF=09h
SeeAlso: AX=F215h/SF=02h

Format of NetWare "Disable Broadcasts" request packet:
Offset  Size    Description     (Table 01823)
 00h    WORD    0001h (length of following data)
 02h    BYTE    02h (subfunction "Enable Broadcast Messages")
SeeAlso: #01824,#01825
--------N-21E1--SF03-------------------------
INT 21 - Novell NetWare - MESSAGE SERVICES - ENABLE BROADCAST MESSAGES
        AH = E1h subfn 03h
        DS:SI -> request buffer (see #01824)
        ES:DI -> reply buffer (see #01825)
Return: AL = error code
Note:   these functions are supported by NetWare 4.0+ but are not listed in
          _NetWare_System_Calls--DOS_; they may be obsolete
SeeAlso: AH=E1h/SF=00h,AH=E1h/SF=02h,AH=E1h/SF=04h,AH=E1h/SF=09h
SeeAlso: AX=F215h/SF=03h

Format of NetWare "Enable Broadcast Messages" request buffer:
Offset  Size    Description     (Table 01824)
 00h    WORD    0001h (length of following data)
 02h    BYTE    03h (subfunction "Enable Broadcast Messages")
SeeAlso: #01825,#01823

Format of NetWare "Enable/Disable Broadcast Messages" reply buffer:
Offset  Size    Description     (Table 01825)
 00h    WORD    (call) 0000h (no data returned)
SeeAlso: #01824,#01823
--------N-21E1--SF04-------------------------
INT 21 O - Novell NetWare - MESSAGE SERVICES - SEND PERSONAL MESSAGE
        AH = E1h subfn 04h
        DS:SI -> request buffer (see #01826)
        ES:DI -> reply buffer (see #01827)
Return: AL = status
            00h successful
            FEh I/O error or out of dynamic workspace
Notes:  this function is supported by NetWare 4.0+ and Advanced NetWare 1.0-2.x
        message pipes use CPU time on the file server; IPX, SPX, or NetBIOS
          connections should be used for peer-to-peer communications as these
          protocols do not use file server time
SeeAlso: AH=E1h/SF=00h,AH=E1h/SF=05h,AH=E1h/SF=06h,AH=E1h/SF=08h

Format of NetWare "Send Personal Message" request buffer:
Offset  Size    Description     (Table 01826)
 00h    WORD    length of following data (max E5h)
 02h    BYTE    04h (subfunction "Send Personal Message")
 03h    BYTE    number of connections (01h-64h)
 04h  N BYTEs   list of connections to receive broadcast message
        BYTE    length of message (01h-7Eh)
      N BYTEs   message (no control characters or characters > 7Eh)
SeeAlso: #01827

Format of NetWare "Send Personal Message" reply buffer:
Offset  Size    Description     (Table 01827)
 00h    WORD    (call) size of following results buffer (max 65h)
 02h    BYTE    number of connections
 03h  N BYTEs   list of per-connection results
                00h successful
                FCh message rejected because queue is full (contains 6 msgs)
                FDh incomplete pipe
                FFh failed
SeeAlso: #01826
--------N-21E1--SF05-------------------------
INT 21 O - Novell NetWare - MESSAGE SERVICES - GET PERSONAL MESSAGE
        AH = E1h subfn 05h
        DS:SI -> request buffer (see #01828)
        ES:DI -> reply buffer (see #01829)
Return: AL = status
            00h successful
            FEh out of dynamic workspace
Desc:   return the oldest message in the default file server's message queue
          for the calling workstation
Note:   this function is supported by NetWare 4.0+ and Advanced NetWare 1.0-2.x
SeeAlso: AH=E1h/SF=01h,AH=E1h/SF=04h,AH=E1h/SF=06h,AH=E1h/SF=08h

Format of NetWare "Get Personal Message" request buffer:
Offset  Size    Description     (Table 01828)
 00h    WORD    0001h (length of following data)
 02h    BYTE    05h (subfunction "Get Personal Message")
SeeAlso: #01829

Format of NetWare "Get Personal Message" reply buffer:
Offset  Size    Description     (Table 01829)
 00h    WORD    (call) size of following results buffer (max 80h)
 02h    BYTE    connection number of sending station
 03h    BYTE    length of message (00h-7Eh)
                00h if no personal messages pending
 04h  N BYTEs   message (no control characters or characters > 7Eh)
SeeAlso: #01828
--------N-21E1--SF06-------------------------
INT 21 O - Novell NetWare - MESSAGE SERVICES - OPEN MESSAGE PIPE
        AH = E1h subfn 06h
        DS:SI -> request buffer (see #01830)
        ES:DI -> reply buffer (see #01831)
Return: AL = status
            00h successful
            FEh out of dynamic workspace
Note:   this function is supported by NetWare 4.0+ and Advanced NetWare 1.0-2.x
SeeAlso: AH=E1h/SF=04h,AH=E1h/SF=07h,AH=E1h/SF=08h

Format of NetWare "Open Message Pipe" request buffer:
Offset  Size    Description     (Table 01830)
 00h    WORD    length of following data (max 66h)
 02h    BYTE    06h (subfunction "Open Message Pipe")
 03h    BYTE    number of pipes to open (01h-64h)
 04h  N BYTEs   list of connection numbers
SeeAlso: #01831,#01832,#01835

Format of NetWare "Open Message Pipe" reply buffer:
Offset  Size    Description     (Table 01831)
 00h    WORD    (call) size of following results buffer (max 65h)
 02h    BYTE    number of connections
 03h  N BYTEs   list of results
                00h successful
                FEh incomplete (target half not yet created)
                FFh failed
SeeAlso: #01830,#01833,#01836
--------N-21E1--SF07-------------------------
INT 21 O - Novell NetWare - MESSAGE SERVICES - CLOSE MESSAGE PIPE
        AH = E1h subfn 07h
        DS:SI -> request buffer (see #01832)
        ES:DI -> reply buffer (see #01833)
Return: AL = status
            00h successful
            FCh full message queue
            FEh out of dynamic workspace
Note:   this function is supported by NetWare 4.0+ and Advanced NetWare 1.0-2.x
SeeAlso: AH=E1h/SF=05h,AH=E1h/SF=06h,AH=E1h/SF=08h

Format of NetWare "Close Mesage Pipe" request buffer:
Offset  Size    Description     (Table 01832)
 00h    WORD    length of following data (max 66h)
 02h    BYTE    07h (subfunction "Close Message Pipe")
 03h    BYTE    number of pipes to close (01h-64h)
 04h  N BYTEs   list of connection numbers
SeeAlso: #01830,#01833

Format of NetWare "Close Message Pipe" reply buffer:
Offset  Size    Description     (Table 01833)
 00h    WORD    (call) size of following results buffer (max 65h)
 02h    BYTE    number of connections
 03h  N BYTEs   list of results
                00h successful
                FDh failed
                FFh no such pipe
SeeAlso: #01831,#01832
--------N-21E1--SF08-------------------------
INT 21 O - Novell NetWare - MESSAGE SERVICES - CHECK PIPE STATUS
        AH = E1h subfn 08h
        DS:SI -> request buffer (see #01835)
        ES:DI -> reply buffer (see #01836)
Return: AL = status (see #01834)
Note:   this function is supported by NetWare 4.0+ and Advanced NetWare 1.0-2.x
SeeAlso: AH=E1h/SF=05h,AH=E1h/SF=06h,AH=E1h/SF=07h,AX=F215h/SF=08h

(Table 01834)
Values for NetWare function status:
 00h    successful
 FCh    full message queue
 FEh    out of dynamic workspace
SeeAlso: #01839

Format of NetWare "Check Pipe Status" request buffer:
Offset  Size    Description     (Table 01835)
 00h    WORD    length of following data (max 66h)
 02h    BYTE    08h (subfunction "Check Pipe Status")
 03h    BYTE    number of pipes to monitor (01h-64h)
 04h  N BYTEs   list of connection numbers
SeeAlso: #01830,#01836

Format of NetWare "Check Pipe Status" reply buffer:
Offset  Size    Description     (Table 01836)
 00h    WORD    (call) size of following results buffer (max 65h)
 02h    BYTE    number of connections
 03h  N BYTEs   list of pipe statuses
                00h open
                FEh incomplete
                FFh closed
SeeAlso: #01831,#01835,#02108
--------N-21E1--SF09-------------------------
INT 21 - Novell NetWare - MESSAGE SERVICES - BROADCAST TO CONSOLE
        AH = E1h subfn 09h
        DS:SI -> request buffer (see #01837)
        ES:DI -> reply buffer (see #01838)
Return: AL = status (see #01834)
Desc:   send a one-line message to the system console on the default file
          server
Note:   this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
SeeAlso: AH=DEh/DL=04h,AH=E1h/SF=00h,AH=E1h/SF=01h,AH=E3h/SF=D1h
SeeAlso: AX=F215h/SF=09h

Format of NetWare "Broadcast to Console" request buffer:
Offset  Size    Description     (Table 01837)
 00h    WORD    length of following data (max 3Eh)
 02h    BYTE    09h (subfunction "Broadcast to Console")
 03h    BYTE    length of message (01h-3Ch)
 04h  N BYTEs   message (no control characters or characters > 7Eh)
SeeAlso: #01838

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01838)
 00h    WORD    (call) 0000h (no results returned)
SeeAlso: #01837
--------E-21E2-------------------------------
INT 21 - OS/286, OS/386 - SET REAL PROCEDURE SIGNAL HANDLER
        AH = E2h
        ???
Return: ???
SeeAlso: AH=E0h"OS/286",AH=E1h"OS/286",AH=E6h"OS/286"
--------N-21E2-------------------------------
INT 21 - DoubleDOS - SEND CHARACTER TO KEYBOARD BUFFER OF OTHER JOB
        AH = E2h
        AL = character
Return: AL = 00h successful
             01h buffer full (128 characters)
SeeAlso: AH=E1h"DoubleDOS",AH=E3h"DoubleDOS",AH=E8h"DoubleDOS"
SeeAlso: AH=F2h"DoubleDOS"
--------N-21E2--SF00-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - SET DIRECTORY HANDLE
        AH = E2h subfn 00h
        DS:SI -> request buffer (see #01840)
        ES:DI -> reply buffer (see #01841)
Return: AL = status (00h,98h,9Bh,9Ch) (see #01839)
Desc:   set the target handle to reference the directory specified by the
          source handle and the source path; both handles must refer to the
          same file server
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
        the target handle is not changed if this function fails
SeeAlso: AH=E2h/SF=01h,AH=E2h/SF=12h,AH=E2h/SF=13h,AX=F216h/SF=00h

(Table 01839)
Values for NetWare function status:
 00h    successful
 84h    not permitted to create
 8Ah    not permitted to delete
 8Bh    not permitted to rename
 8Ch    not permitted to modify
 98h    nonexistent volume
 9Bh    invalid directory handle
 9Ch    invalid path
 9Eh    invalid filename
 9Fh    directory currently in use
 A0h    directory not empty
 C6h    no console rights
 FCh    no such bindery object
SeeAlso: #01834,#01866

Format of NetWare "Set Directory Handle" request buffer:
Offset  Size    Description     (Table 01840)
 00h    WORD    length of following data (max 103h)
 02h    BYTE    00h (subfunction "Set Directory Handle")
 03h    BYTE    directory handle of target
 04h    BYTE    directory handle of source
 05h    BYTE    length of source directory path (01h-FFh)
 06h  N BYTEs   source directory path
SeeAlso: #01841

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01841)
 00h    WORD    (call) 0000h (no results returned)
SeeAlso: #01840
--------N-21E2--SF01-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - GET DIRECTORY PATH
        AH = E2h subfn 01h
        DS:SI -> request buffer (see #01842)
        ES:DI -> reply buffer (see #01843)
Return: AL = status (00h,9Bh) (see #01839)
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=E2h/SF=02h,AH=E2h/SF=03h,AH=E2h/SF=1Ah,AH=E9h,AX=F216h/SF=01h

Format of NetWare "Get Directory Path" request buffer:
Offset  Size    Description     (Table 01842)
 00h    WORD    0002h (length of following data)
 02h    BYTE    01h (subfunction "Get Directory Path")
 03h    BYTE    directory handle
SeeAlso: #01843,#01844

Format of NetWare "Get Directory Path" reply buffer:
Offset  Size    Description     (Table 01843)
 00h    WORD    (call) length of following data buffer
 02h    BYTE    length of directory path (01h-FFh)
 03h  N BYTEs   full directory path including volume
SeeAlso: #01842,#01845
--------N-21E2--SF02-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - SCAN DIRECTORY INFORMATION
        AH = E2h subfn 02h
        DS:SI -> request buffer (see #01844)
        ES:DI -> reply buffer (see #01845)
Return: AL = status (00h,98h,9Bh,9Ch) (see #01839)
Desc:   get information about the first or next subdirectory of the specified
          directory
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=E2h/SF=01h,AH=E2h/SF=03h,AH=E2h/SF=19h,AX=F216h/SF=02h

Format of NetWare "Scan Directory Information" request buffer:
Offset  Size    Description     (Table 01844)
 00h    WORD    length of following data (max 104h)
 02h    BYTE    02h (subfunction "Scan Directory Information")
 03h    BYTE    directory handle
 04h    WORD    (big-endian) subdirectory number
                0000h for first call, returned subdir number + 1 on next call
 06h    BYTE    length of directory path
 07h  N BYTEs   directory path
SeeAlso: #01842,#01845

Format of NetWare "Scan Directory Information" reply buffer:
Offset  Size    Description     (Table 01845)
 00h    WORD    (call) 001Ch (length of following data buffer)
 02h 16 BYTEs   subdirectory name
 12h    DWORD   (big-endian) date and time of creation (see #01846)
 16h    DWORD   (big-endian) object ID of owner
 1Ah    BYTE    maximum directory rights (see #01849)
 1Bh    BYTE    unused
 1Ch    WORD    (big-endian) subdirectory number
SeeAlso: #01843,#01844,#02111 at AX=F216h/SF=02h

Bitfields for NetWare date and time:
Bit(s)  Description     (Table 01846)
 31-25  year-1980
 24-21  month
 20-16  day
 15-11  hour
 10-5   minute
 4-0    second
--------N-21E2--SF03-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - GET EFFECTIVE DIRECTORY RIGHTS
        AH = E2h subfn 03h
        DS:SI -> request buffer (see #01847)
        ES:DI -> reply buffer (see #01848)
Return: AL = status (00h,98h,9Bh) (see #01839)
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=E2h/SF=01h,AH=E2h/SF=02h,AX=F216h/SF=03h

Format of NetWare "Get Effective Directory Rights (old)" request buffer:
Offset  Size    Description     (Table 01847)
 00h    WORD    length of following data (max 102h)
 02h    BYTE    03h (subfunction "Get Effective Directory Rights (old)")
 03h    BYTE    directory handle
 04h    BYTE    length of directory path (00h-FFh)
 05h  N BYTEs   directory path
SeeAlso: #01848,#01850

Format of NetWare "Get Effective Directory Rights" reply buffer:
Offset  Size    Description     (Table 01848)
 00h    WORD    (call) 0001h (length of following data buffer)
 02h    BYTE    effective directory rights (see #01849)
SeeAlso: #01847

Bitfields for NetWare directory rights:
Bit(s)  Description     (Table 01849)
 0      reading allowed
 1      writing allowed
 2      opens allowed
 3      file creation allowed
 4      deletion allowed
 5      "parental" may create/delete subdirectories and grant/revoke trustee
          rights
 6      directory search allowed
 7      file attributes may be changed
SeeAlso: #01848,#01850
--------N-21E2--SF04-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - MODIFY MAXIMUM RIGHTS MASK
        AH = E2h subfn 04h
        DS:SI -> request buffer (see #01850)
        ES:DI -> reply buffer (see #01851)
Return: AL = status (00h,8Ch,98h,9Ch) (see #01839)
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=E2h/SF=03h,AH=E2h/SF=0Ah,AH=E2h/SF=0Dh,AX=F216h/SF=04h

Format of NetWare "Modify Maximum Rights Mask" request buffer:
Offset  Size    Description     (Table 01850)
 00h    WORD    length of following data (max 104h)
 02h    BYTE    04h (subfunction "Modify Maximum Rights Mask")
 03h    BYTE    directory handle
 04h    BYTE    rights to grant (see #01849)
 05h    BYTE    rights to revoke (see #01849)
 06h    BYTE    length of directory path (00h-FFh)
 07h  N BYTEs   directory path
Note:   the rights specified at offset 05h are revoked first, and then the
          rights specified at offset 04h are added to the resulting rights
          mask
SeeAlso: #01847,#01851

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01851)
 00h    WORD    (call) 0000h (no results returned)
SeeAlso: #01850
--------N-21E2--SF05-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - GET VOLUME NUMBER
        AH = E2h subfn 05h
        DS:SI -> request buffer (see #01852)
        ES:DI -> reply buffer (see #01853)
Return: AL = status (00h,98h) (see #01839)
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=DAh,AH=E2h/SF=02h,AH=E2h/SF=05h,AH=E2h/SF=15h,AH=E3h/SF=E9h
SeeAlso: AX=F216h/SF=05h

Format of NetWare "Get Volume Number" request buffer:
Offset  Size    Description     (Table 01852)
 00h    WORD    length of following data (max 12h)
 02h    BYTE    05h (subfunction "Get Volume Number")
 03h    BYTE    length of volume name (01h-10h)
 04h  N BYTEs   volume name
SeeAlso: #01853,#02113 at AX=F216h/SF=05h

Format of NetWare "Get Volume Number" reply buffer:
Offset  Size    Description     (Table 01853)
 00h    WORD    (call) 0001h (length of following results buffer)
 02h    BYTE    volume number
SeeAlso: #01852,#02113 at AX=F216h/SF=05h
--------N-21E2--SF06-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - GET VOLUME NAME
        AH = E2h subfn 06h
        DS:SI -> request buffer (see #01854)
        ES:DI -> reply buffer (see #01855)
Return: AL = status (00h,98h) (see #01839)
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=DAh,AH=E2h/SF=02h,AH=E2h/SF=05h,AH=E2h/SF=15h,AH=E2h/SF=1Ah
SeeAlso: AH=E3h/SF=E9h,AX=F216h/SF=06h

Format of NetWare "Get Volume Name" request buffer:
Offset  Size    Description     (Table 01854)
 00h    WORD    0002h (length of following data)
 02h    BYTE    06h (subfunction "Get Volume Name")
 03h    BYTE    volume number
SeeAlso: #01855,#02114 at AX=F216h/SF=06h

Format of NetWare "Get Volume Name" reply buffer:
Offset  Size    Description     (Table 01855)
 00h    WORD    (call) 0011h (length of following results buffer)
 02h    BYTE    length of volume name
 03h 16 BYTEs   NUL-padded volume name
SeeAlso: #01854,#02114 at AX=F216h/SF=06h
--------N-21E2--SF0A-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - CREATE DIRECTORY
        AH = E2h subfn 0Ah
        DS:SI -> request buffer (see #01856)
        ES:DI -> reply buffer (see #01857)
Return: AL = status (00h,84h,98h,FCh) (see #01839)
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=39h,AH=E2h/SF=0Bh,AH=E2h/SF=0Fh,AX=F216h/SF=0Ah

Format of NetWare "Create Directory" request buffer:
Offset  Size    Description     (Table 01856)
 00h    WORD    length of following data (max 103h)
 02h    BYTE    0Ah (subfunction "Create Directory")
 03h    BYTE    directory handle
 04h    BYTE    maximum directory rights (see #01849)
 05h    BYTE    length of directory path (00h-FFh)
 06h  N BYTEs   directory path
SeeAlso: #01857,#01858

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01857)
 00h    WORD    (call) 0000h (no data returned)
SeeAlso: #01856,#01858
--------N-21E2--SF0B-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - DELETE DIRECTORY
        AH = E2h subfn 0Bh
        DS:SI -> request buffer (see #01858)
        ES:DI -> reply buffer (see #01857)
Return: AL = status (00h,8Ah,98h,9Bh,9Ch,9Fh,A0h) (see #01839)
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=3Ah,AH=E2h/SF=0Ah,AH=E2h/SF=0Fh,AX=F216h/SF=0Bh

Format of NetWare "Delete Directory" request buffer:
Offset  Size    Description     (Table 01858)
 00h    WORD    length of following data (max 103h)
 02h    BYTE    0Bh (subfunction "Delete Directory")
 03h    BYTE    directory handle
 04h    BYTE    unused
 05h    BYTE    length of directory path (00h-FFh)
 06h  N BYTEs   directory path
SeeAlso: #01856,#01857
--------N-21E2--SF0C-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - SCAN DIRECTORY FOR TRUSTEES
        AH = E2h subfn 0Ch
        DS:SI -> request buffer (see #01859)
        ES:DI -> reply buffer (see #01860)
Return: AL = status (00h,9Ch) (see also #01839)
            9Ch no more trustees
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E2h/SF=0Dh,AH=E2h/SF=0Eh,AH=E3h/SF=47h,AX=F216h/SF=0Ch

Format of NetWare "Scan Directory For Trustees" request buffer:
Offset  Size    Description     (Table 01859)
 00h    WORD    length of following data (max 103h)
 02h    BYTE    0Ch (subfunction "Scan Directory For Trustees")
 03h    BYTE    directory handle
 04h    BYTE    sequence number
                00h on first call, increment for each subsequent call
 05h    BYTE    length of directory path (00h-FFh)
 06h  N BYTEs   directory path
SeeAlso: #01860,#01861,#02115 at AX=F216h/SF=0Ch

Format of NetWare "Scan Directory For Trustees" reply buffer:
Offset  Size    Description     (Table 01860)
 00h    WORD    (call) 0031h (length of following results buffer)
 02h 16 BYTEs   directory name
 12h  4 BYTEs   date and time of creation
 16h    DWORD   (big-endian) object ID of owner
 1Ah  5 DWORDs  (big-endian) object IDs of Trustees 0 through 4
                00000000h = end of group
 2Eh  5 BYTEs   directory rights for Trustees 0 through 4 (see #01849)
SeeAlso: #01859,#01863,#02115 at AX=F216h/SF=0Ch
--------N-21E2--SF0D-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - ADD TRUSTEE TO DIRECTORY
        AH = E2h subfn 0Dh
        DS:SI -> request buffer (see #01861)
        ES:DI -> reply buffer (see #01863)
Return: AL = status (00h,8Ch,FCh) (see #01839)
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=E2h/SF=0Ch,AH=E2h/SF=0Eh,AH=E3h/SF=47h,AX=F216h/SF=0Dh

Format of NetWare "Add Trustee To Directory" request buffer:
Offset  Size    Description     (Table 01861)
 00h    WORD    length of following data (max 107h)
 02h    BYTE    0Dh (subfunction "Add Trustee To Directory")
 03h    BYTE    directory handle
 04h    DWORD   (big-endian) object ID of trustee
 08h    BYTE    trustee directory rights (see #01849)
 09h    BYTE    length of directory path (00h-FFh)
 0Ah  N BYTEs   directory path
SeeAlso: #01863
--------N-21E2--SF0E-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - DELETE TRUSTEE FROM DIRECTORY
        AH = E2h subfn 0Eh
        DS:SI -> request buffer (see #01862)
        ES:DI -> reply buffer (see #01863)
Return: AL = status (00h,98h,9Bh,9Ch) (see #01839)
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=E2h/SF=0Ch,AH=E2h/SF=0Dh,AX=F216h/SF=0Eh

Format of NetWare "Delete Trustee From Directory" request buffer:
Offset  Size    Description     (Table 01862)
 00h    WORD    length of following data (max 107h)
 02h    BYTE    0Eh (subfunction "Delete Trustee From Directory")
 03h    BYTE    directory handle
 04h    DWORD   (big-endian) object ID of trustee
 08h    BYTE    unused
 09h    BYTE    length of directory path (00h-FFh)
 0Ah  N BYTEs   directory path
SeeAlso: #01863

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01863)
 00h    WORD    (call) 0000h (no data returned)
SeeAlso: #01862,#01864,#01865
--------N-21E2--SF0F-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - RENAME DIRECTORY
        AH = E2h subfn 0Fh
        DS:SI -> request buffer (see #01864)
        ES:DI -> reply buffer (see #01863)
Return: AL = status (00h,8Bh,9Bh,9Ch,9Eh) (see #01839)
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
        directories SYS:LOGIN, SYS:MAIL, and SYS:PUBLIC must not be renamed
SeeAlso: AH=56h,AH=E2h/SF=0Ah,AH=E2h/SF=0Bh,AX=F216h/SF=0Fh

Format of NetWare "Rename Directory" request buffer:
Offset  Size    Description     (Table 01864)
 00h    WORD    length of following data (max 111h)
 02h    BYTE    0Fh (subfunction "Rename Directory")
 03h    BYTE    directory handle
 04h    BYTE    length of directory path (00h-FFh)
 05h  N BYTEs   directory path
        BYTE    length of new directory name (01h-0Eh)
      N BYTEs   new directory name
SeeAlso: #01863
--------N-21E2--SF10-------------------------
INT 21 - Novell NetWare - FILE SERVICES - PURGE ERASED FILES (OLD)
        AH = E2h subfn 10h
        DS:SI -> request buffer (see #01865)
        ES:DI -> reply buffer (see #01863)
Return: AL = status (00h,C6h) (see #01866)
Desc:   purges files marked for deletion on the file server by the calling
          workstation
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=13h,AH=41h,AH=E2h/SF=11h,AH=E3h/SF=CEh,AX=F244h,AX=F216h/SF=10h

Format of NetWare "Purge Erased Files" request buffer:
Offset  Size    Description     (Table 01865)
 00h    WORD    0001h (length of following data)
 02h    BYTE    10h (subfunction "Purge Erased Files")
SeeAlso: #01863
--------N-21E2--SF11-------------------------
INT 21 - Novell NetWare - FILE SERVICES - RESTORE ERASED FILE (OLD)
        AH = E2h subfn 11h
        DS:SI -> request buffer (see #01867)
        ES:DI -> reply buffer (see #01868)
Return: AL = status (00h,98h,FFh) (see #01866)
Desc:   restores one file marked for deletion which has not yet been purged
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=13h,AH=41h,AH=E2h/SF=10h,AH=E3h/SF=CEh,AX=F244h

(Table 01866)
Values for NetWare function status:
 00h    successful
 98h    nonexistent volume
 9Ch    invalid path
 C6h    no console rights
 FFh    no more erased files
SeeAlso: #01839,#01899

Format of NetWare "Restore Erased File" request buffer:
Offset  Size    Description     (Table 01867)
 00h    WORD    length of following data (max 13h)
 02h    BYTE    11h (subfunction "Restore Erased File")
 03h    BYTE    directory handle or 00h
 04h    BYTE    length of volume name
 05h  N BYTEs   volume name (including colon)
Note:   if both a directory handle and a volume name are specified, the volume
          name overrides the handle
SeeAlso: #01868,#02116

Format of NetWare "Restore Erased File" reply buffer:
Offset  Size    Description     (Table 01868)
 00h    WORD    (call) 001Eh (size of following results buffer)
 02h 15 BYTEs   ASCIZ name of erased file
 11h 15 BYTEs   ASCIZ name under which file was restored
SeeAlso: #01867,#02116
--------N-21E2--SF12-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - ALLOC PERMANENT DIRECTORY HANDLE
        AH = E2h subfn 12h
        DS:SI -> request buffer (see #01869)
        ES:DI -> reply buffer (see #01870)
Return: AL = status (00h,98h,9Ch) (see #01866)
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=E2h/SF=00h,AH=E2h/SF=13h,AH=E2h/SF=14h,AX=F216h/SF=12h

Format of NetWare "Allocate Permanent Directory Handle" request buffer:
Offset  Size    Description     (Table 01869)
 00h    WORD    length of following data (max 103h)
 02h    BYTE    12h (subfunction "Allocate Permanent Directory Handle")
 03h    BYTE    directory handle
 04h    BYTE    drive ('A'-'Z')
 05h    BYTE    length of directory path
 06h  N BYTEs   directory path
SeeAlso: #01870,#01871,#02118

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01870)
 00h    WORD    (call) 0002h (size of following results buffer)
 02h    BYTE    new directory handle
 03h    BYTE    effective directory rights (see #01849)
SeeAlso: #01869,#02118
--------N-21E2--SF13-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - ALLOC TEMPORARY DIRECTORY HANDLE
        AH = E2h subfn 13h
        DS:SI -> request buffer (see #01871)
        ES:DI -> reply buffer (see #01870)
Return: AL = status (00h,98h,9Ch) (see #01866)
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
        this call is the same as AH=E2h/SF=12h except that the directory handle
          will be automatically deallocated when the calling application
          executes an End of Job call (AH=D6h) or terminates
SeeAlso: AH=D6h,AH=E2h/SF=00h,AH=E2h/SF=12h,AH=E2h/SF=14h,AH=E2h/SF=16h
SeeAlso: AX=F216h/SF=13h

Format of NetWare "Allocate Temporary Directory Handle" request buffer:
Offset  Size    Description     (Table 01871)
 00h    WORD    length of following data (max 103h)
 02h    BYTE    13h (subfunction "Allocate Temporary Directory Handle")
 03h    BYTE    directory handle
 04h    BYTE    drive ('A'-'Z')
 05h    BYTE    length of directory path
 06h  N BYTEs   directory path
SeeAlso: #01869,#01872
--------N-21E2--SF14-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - DEALLOCATE DIRECTORY HANDLE
        AH = E2h subfn 14h
        DS:SI -> request buffer (see #01872)
        ES:DI -> reply buffer (see #01873)
Return: AL = status (00h,9Bh) (see #01839)
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=E2h/SF=12h,AH=E2h/SF=13h,AX=F216h/SF=14h

Format of NetWare "Deallocate Directory Handle" request buffer:
Offset  Size    Description     (Table 01872)
 00h    WORD    0002h (length of following data)
 02h    BYTE    14h (subfunction "Deallocate Directory Handle")
 03h    BYTE    directory handle
SeeAlso: #01873

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01873)
 00h    WORD    (call) 0000h (no returned data)
SeeAlso: #01872
--------N-21E2--SF15-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - GET VOLUME INFO WITH HANDLE
        AH = E2h subfn 15h
        DS:SI -> request buffer (see #01874)
        ES:DI -> reply buffer (see #01875)
Return: AL = status
            00h successful
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=DAh,AH=E2h/SF=02h,AH=E2h/SF=06h,AH=E2h/SF=19h,AH=E3h/SF=E9h
SeeAlso: AX=F216h/SF=15h

Format of NetWare "Get Volume Info with Handle" request buffer:
Offset  Size    Description     (Table 01874)
 00h    WORD    0002h (length of following data)
 02h    BYTE    15h (subfunction "Get Volume Info With Handle")
 03h    BYTE    directory handle
SeeAlso: #01875,#02119

Format of NetWare "Get Volume Info with Handle" reply buffer:
Offset  Size    Description     (Table 01875)
 00h    WORD    (call) 001Ch (length of following results buffer)
 02h    WORD    (big-endian) sectors per block
 04h    WORD    (big-endian) total blocks on volume
 06h    WORD    (big-endian) blocks available on volume
 08h    WORD    (big-endian) total directory slots
 0Ah    WORD    (big-endian) directory slots available
 0Ch 16 BYTEs   NUL-padded volume name
 1Ch    WORD    (big-endian) flag: volume removable if nonzero
SeeAlso: #01874,#02119
--------N-21E2--SF16-------------------------
INT 21 u - Novell NetWare - DIRECTORY SERVICES - ALLOC SPECIAL TEMP DIR HANDLE
        AH = E2h subfn 16h
        DS:SI -> request buffer (see #01876)
        ES:DI -> reply buffer (see #01873)
Return: AL = status
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX,
          but is not described in _NetWare_System_Calls--DOS_
SeeAlso: AH=E2h/SF=13h,AH=E2h/SF=14h,AX=F216h/SF=16h

Format of NetWare "Alloc Special Temporary Directory Handle" request buffer:
Offset  Size    Description     (Table 01876)
 00h    WORD    length of following data
 02h    BYTE    16h (subfunction "Allocate Special Temporary Directory Handle")
 03h    BYTE    source directory handle
 04h    BYTE    drive name ('A'-'Z')
 05h    BYTE    path length
 06h  N BYTEs   directory path
SeeAlso: #01873
--------N-21E2--SF17-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - SAVE DIRECTORY HANDLE
        AH = E2h subfn 17h
        DS:SI -> request buffer (see #01877)
        ES:DI -> reply buffer (see #01878)
Return: AL = status
            00h successful
            else network error code
Note:   this function is supported by Advanced NetWare 2.0+ and Alloy NTNX
SeeAlso: AH=E2h/SF=12h,AH=E2h/SF=17h,AX=F216h/SF=17h

Format of NetWare "Save Directory Handle" request buffer:
Offset  Size    Description     (Table 01877)
 00h    WORD    0002h (length of following data)
 02h    BYTE    17h (subfunction "Save Directory Handle")
 03h    BYTE    directory handle
SeeAlso: #01878,#01879

Format of NetWare "Save Directory Handle" reply buffer:
Offset  Size    Description     (Table 01878)
 00h    WORD    (call) 0010h (length of following results buffer)
 02h 16 BYTEs   save buffer
SeeAlso: #01877,#01880
--------N-21E2--SF18-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - RESTORE DIRECTORY HANDLE
        AH = E2h subfn 18h
        DS:SI -> request buffer (see #01879)
        ES:DI -> reply buffer (see #01880)
Return: AL = status
            00h successful
            else network error code
Desc:   restore a previously saved directory handle to reproduce an executing
          environment, possibly on a different execution site
Note:   this function is supported by Advanced NetWare 2.0+ and Alloy NTNX
SeeAlso: AH=E2h/SF=12h,AH=E2h/SF=17h,AX=F216h/SF=18h

Format of NetWare "Restore Directory Handle" request buffer:
Offset  Size    Description     (Table 01879)
 00h    WORD    0011h (length of following data)
 02h    BYTE    18h (subfunction "Restore Directory Handle")
 03h 16 BYTEs   save buffer
SeeAlso: #01877,#01880

Format of NetWare "Restore Directory Handle" reply buffer:
Offset  Size    Description     (Table 01880)
 00h    WORD    (call) 0002h (length of following results buffer)
 02h    BYTE    new directory handle
 03h    BYTE    effective rights (see #01849)
SeeAlso: #01879
--------N-21E2--SF19-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - SET DIRECTORY INFORMATION
        AH = E2h subfn 19h
        DS:SI -> request buffer (see #01881)
        ES:DI -> reply buffer (see #01882)
Return: AL = status (00h,9Bh,9Ch) (see #01839)
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E2h/SF=02h,AH=E2h/SF=0Fh,AX=F216h/SF=19h

Format of NetWare "Set Directory Information" request buffer:
Offset  Size    Description     (Table 01881)
 00h    WORD    length of following data (max 10Bh)
 02h    BYTE    19h (subfunction "Set Directory Information")
 03h    BYTE    directory handle
 04h    DWORD   (big-endian) date and time of creation
 08h    DWORD   (big-endian) object ID of owner
 0Ch    BYTE    maximum directory rights (see #01849)
 0Dh    BYTE    length of directory path
 0Eh  N BYTEs   directory path
SeeAlso: #01882

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01882)
 00h    WORD    (call) 0000h (no results returned)
SeeAlso: #01881
--------N-21E2--SF1A-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET PATH FROM DIRECTORY ENTRY
        AH = E2h subfn 1Ah
        DS:SI -> request buffer (see #01883)
        ES:DI -> reply buffer (see #01884)
Return: AL = status
            00h successful
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=E2h/SF=01h,AH=E2h/SF=06h,AH=E3h/SF=D7h,AX=F216h/SF=1Ah

Format of NetWare "Get Path from Directory Entry" request buffer:
Offset  Size    Description     (Table 01883)
 00h    WORD    0004h (length of following data)
 02h    BYTE    1Ah (subfunction "Get Path From Directory Entry")
 03h    BYTE    volume number (00h-1Fh)
 04h    WORD    (big-endian) directory entry number
SeeAlso: #01884,#02122

Format of NetWare "Get Path from Directory Entry" reply buffer:
Offset  Size    Description     (Table 01884)
 00h    WORD    (call) size of following results record (max 200h)
 02h 256 BYTEs  path
SeeAlso: #01883,#02122
--------!---Section--------------------------
Interrupt List, part 9 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------E-21E3-------------------------------
INT 21 - OS/286, OS/386 - ISSUE REAL INTERRUPT
        AH = E3h
        AL = interrupt number
        ???
Return: ???
Note:   protected mode only???
SeeAlso: AH=E1h"OS/286",INT 31/AX=0300h
--------T-21E3-------------------------------
INT 21 - DoubleDOS - ADD CHARACTER TO KEYBOARD BUFFER OF CURRENT JOB
        AH = E3h
        AL = character
Return: AL = status
            00h successful
            01h buffer full (128 characters)
SeeAlso: AH=E1h"DoubleDOS",AH=E2h"DoubleDOS",AH=E8h"DoubleDOS"
SeeAlso: AH=F3h"DoubleDOS"
--------N-21E3-------------------------------
INT 21 - Novell NetWare - CONNECTION CONTROL
        AH = E3h
        DS:SI -> request buffer (see #01885)
        ES:DI -> reply buffer (see #01886)
Return: AL = status
            00h successful
            else error code
Note:   supported by NetWare 4.0+, Advanced NetWare 1.0+, and Alloy NTNX
SeeAlso: AH=E3h/SF=0Ah,AH=E3h/SF=32h,AH=E3h/SF=64h,AH=E3h/SF=C8h

Format of NetWare request buffer:
Offset  Size    Description     (Table 01885)
 00h    WORD    length of following data
 02h    BYTE    subfunction number (see also AH=E3h/SF=01h,AH=E3h/SF=02h)
                00h login
                03h map object to number
                04h map number to object
                05h get station's logged information
                06h get station's root mask (obsolete)
                07h map group name to number
                08h map number to group name
                09h get memberset M of group G
        var     depends on subfunction
Notes:  the above subfunctions are not described in _NetWare_System_Calls--DOS_
        see separate entries below for other subfunctions
SeeAlso: #01886,#01887,#01890

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01886)
 00h    WORD    (call) length of following buffer space for results
        var     depends on subfunction
SeeAlso: #01885

Format of NetWare object property:
Offset  Size    Description     (Table 01887)
 00h 1-16 BYTEs property name (see also #01888)
  N     BYTE    flags
                bit 0: property is dynamic
                bit 1: property is a set rather than an item
 N+1    BYTE    security levels (see #01889)
        ???

(Table 01888)
Values for names of well-known NetWare properties:
 ACCOUNT_BALANCE
 ACCOUNT_SERVERS
 GROUP_MEMBERS
 GROUPS_I'M_IN
 IDENTIFICATION         user's name
 LOGIN_CONTROL
 NET_ADDRESS
 OPERATORS
 PASSWORD
 SECURITY_EQUALS

(Table 01889)
Values for NetWare security levels:
 00h    "anyone" everyone may access
 01h    "logged" only logged-in clients may access
 02h    "object" only clients logged-in with object's name, type, and password
 03h    "supervisor" only clients logged-in with supervisor privileges
 04h    "NetWare" only NetWare may access
Note:   the above values are stored in a nybble; the high half-byte is write
          access and the low half-byte is read access

(Table 01890)
Values for NetWare object type:
 0000h  unknown
 0001h  user
 0002h  user group
 0003h  print queue / print server
 0004h  file server
 0005h  job server
 0006h  gateway
 0007h  print server
 0008h  archive queue
 0009h  archive server
 000Ah  job queue
 000Bh  administration
 0021h  NAS SNA gateway
 0024h  remote bridge server???
 0026h  remote bridge server
 0027h  TCPIP gateway
 002Dh  time synchronization server
 002Eh  archive server dynamic SAP
 0047h  advertising print server
 0053h  print queue uwer
 0048h-8000h reserved
 FFFFh  wild (used only for finding objects)
--------N-21E3--SF01-------------------------
INT 21 - Novell NetWare - CONNECTION SERVICES - CHANGE USER PASSWORD (OLD)
        AH = E3h subfn 01h
        DS:SI -> request buffer (see #01891)
        ES:DI -> reply buffer (see #01895)
Return: AL = status
            00h successful
            else error code
Note:   supported by NetWare 4.0+, Advanced NetWare 1.0+, and Alloy NTNX
SeeAlso: AH=E3h/SF=0Ah,AH=E3h/SF=32h,AH=E3h/SF=64h,AH=E3h/SF=C8h

Format of NetWare "Change User Password (old)" request packet:
Offset  Size    Description     (Table 01891)
 00h    WORD    length of following data
 02h    BYTE    01h (subfunction "Change User Password (old)")
 03h    BYTE    length of user name
 04h  N BYTEs   user name
        BYTE    length of old password
      N BYTEs   old password
        BYTE    length of new password
      N BYTEs   new password
SeeAlso: #01895
--------N-21E3--SF02-------------------------
INT 21 - Novell NetWare - CONNECTION SERVICES - CHANGE USER PASSWORD (OLD)
        AH = E3h subfn 02h
        DS:SI -> request buffer (see #01892)
        ES:DI -> reply buffer (see #01893)
Return: AL = status
            00h successful
            else error code
Note:   supported by NetWare 4.0+, Advanced NetWare 1.0+, and Alloy NTNX
SeeAlso: AH=E3h/SF=01h,AH=E3h/SF=03h,AH=E3h/SF=0Ah

Format of NetWare "Get User Connection List (old)" request packet:
Offset  Size    Description     (Table 01892)
 00h    WORD    length of following data
 02h    BYTE    02h (subfunction "Get User Connection List (old)")
 03h    BYTE    length of user name
 04h  N BYTEs   user name
SeeAlso: #01893,#02162

Format of NetWare "Get User Connection List (old)" reply packet:
Offset  Size    Description     (Table 01893)
 00h    WORD    (call) length of following buffer
 02h    BYTE    length of connection list
 03h    BYTE    number of bytes in connection list
 04h  N BYTEs   list of connection numbers in use by user
SeeAlso: #01892,#02162
--------N-21E3--SF03-------------------------
INT 21 - Novell NetWare - CONNECTION SERVICES - MAP OBJECT TO NUMBER (OLD)
        AH = E3h subfn 03h
        DS:SI -> request buffer
        ES:DI -> reply buffer
Return: AL = status
            00h successful
            else error code
Note:   supported by NetWare 4.0+, Advanced NetWare 1.0+, and Alloy NTNX
SeeAlso: AH=E3h/SF=01h,AH=E3h/SF=02h,AH=E3h/SF=0Ah
--------N-21E3--SF0A-------------------------
INT 21 - Novell NetWare - CONNECTION SERVICES - ENTER LOGIN AREA
        AH = E3h subfn 0Ah
        DS:SI -> request buffer (see #01894)
        ES:DI -> reply buffer (see #01895)
Return: AL = status
            00h successful
Desc:   change the login directory for the calling workstation
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=D7h,AH=E3h/SF=14h

Format of NetWare "Enter Login Area" request buffer:
Offset  Size    Description     (Table 01894)
 00h    WORD    length of following data (max 102h)
 02h    BYTE    0Ah (subfunction "Enter Login Area")
 03h    BYTE    number of local drives
 04h    BYTE    length of subdirectory name (00h-FFh)
 05h  N BYTEs   name of subdirectory under SYS:LOGIN where to find the login
                  utility
SeeAlso: #01895

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01895)
 00h    WORD    (call) 0000h (no data returned)
SeeAlso: #01891,#01894,#01898
--------N-21E3--SF0C-------------------------
INT 21 U - Novell NetWare - VERIFY NETWORK SERIAL NUMBER
        AH = E3h subfn 0Ch
        DS:SI -> request buffer (see #01896)
        ES:DI -> reply buffer (see #01897)
Return: AL = status
            00h successful
Note:   if the network serial number to be verified is correct, the reply
          buffer will contain the corresponding application number
SeeAlso: AH=E3h/SF=12h,AX=F217h/SF=0Ch

Format of NetWare "Verify Network Serial Number" request buffer:
Offset  Size    Description     (Table 01896)
 00h    WORD    0005h (length of following data)
 02h    BYTE    0Ch (subfunction "Verify Network Serial Number")
 03h    DWORD   (big-endian) network serial number to verify
SeeAlso: #01897,#02163

Format of NetWare "Verify Network Serial Number" reply buffer:
Offset  Size    Description     (Table 01897)
 00h    WORD    (call) 0002h (size of following results buffer)
 02h    WORD    (big-endian) application number
SeeAlso: #01896,#02163
--------N-21E3--SF0D-------------------------
INT 21 - Novell NetWare - MESSAGE SERVICES - LOG NETWORK MESSAGE
        AH = E3h subfn 0Dh
        DS:SI -> request buffer (see #01898)
        ES:DI -> reply buffer (see #01895)
Return: AL = status
            00h successful
Desc:   append a line to the default file server's NET$LOG.MSG file
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=E1h/SF=09h

Format of NetWare "Log Network Message" request buffer:
Offset  Size    Description     (Table 01898)
 00h    WORD    length of following data (max 52h)
 02h    BYTE    0Dh (subfunction "Log Network Message")
 03h    BYTE    length of message (01h-50h)
 04h  N BYTEs   message (no control characters or characters > 7Eh)
SeeAlso: #01895
--------N-21E3--SF0E-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET DISK UTILIZATION
        AH = E3h subfn 0Eh
        DS:SI -> request buffer (see #01900)
        ES:DI -> reply buffer (see #01901)
Return: AL = status (00h,98h,F2h) (see #01899)
Notes:  this function is supported by Advanced NetWare 2.1+
        the caller must have bindery object read privileges
SeeAlso: AH=E3h/SF=11h,AH=E3h/SF=D6h,AH=E3h/SF=D9h,AH=E3h/SF=E6h,AH=E3h/SF=E9h
SeeAlso: AX=F217h/SF=0Eh

(Table 01899)
Values for NetWare function status:
 00h    successful
 98h    nonexistent volume
 F2h    not permitted to read object
SeeAlso: #01866,#01902

Format of NetWare "Get Disk Utilization" request buffer:
Offset  Size    Description     (Table 01900)
 00h    WORD    0005h (length of following data)
 02h    BYTE    0Eh (subfunction "Get Disk Utilization")
 03h    BYTE    volume number (00h-1Fh)
 04h    DWORD   (big-endian) object ID
SeeAlso: #01901,#02164

Format of NetWare "Get Disk Utilization" reply buffer:
Offset  Size    Description     (Table 01901)
 00h    WORD    (call) 000Bh (size of following results buffer)
 02h    BYTE    volume number (00h-1Fh)
 03h    DWORD   (big-endian) object ID
 07h    WORD    (big-endian) directories used by object
 09h    WORD    (big-endian) files created by object
 0Bh    WORD    (big-endian) disk blocks used by object-created files
SeeAlso: #01900,#02164
--------N-21E3--SF0F-------------------------
INT 21 - Novell NetWare - FILE SERVICES - SCAN FILE INFORMATION
        AH = E3h subfn 0Fh
        DS:SI -> request buffer (see #01903)
        ES:DI -> reply buffer (see #01904)
Return: AL = status (see #01902)
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=B6h,AH=E3h/SF=10h,AX=F217h/SF=0Fh

(Table 01902)
Values for NetWare function status:
 00h    successful
 89h    not permitted to search directory
 FFh    no more matching files
SeeAlso: #01899,#01920

Format of NetWare "Scan File Information" request buffer:
Offset  Size    Description     (Table 01903)
 00h    WORD    length of following data (max 105h)
 02h    BYTE    0Fh (subfunction "Scan File Information")
 03h    WORD    (big-endian) sequence number
                FFFFh on first call
 05h    BYTE    directory handle or 00h
 06h    BYTE    search attributes (see #01420 at AX=4301h)
 07h    BYTE    length of filespec
 08h  N BYTEs   ASCIZ uppercase filespec
SeeAlso: #01904,#02165

Format of NetWare "Scan File Information" reply buffer:
Offset  Size    Description     (Table 01904)
 00h    WORD    (call) 005Eh (size of following results buffer)
 02h    WORD    next sequence number (place in request buffer for next call)
 04h 14 BYTEs   ASCIZ filename
 12h    BYTE    file attributes (see #01420 at AX=4301h)
 13h    BYTE    extended file attributes (see #01804 at AH=B6h)
 14h    DWORD   (big-endian) file size in bytes
 18h    WORD    (big-endian) file's creation date (see #01666 at AX=5700h)
 1Ah    WORD    (big-endian) date of last access (see #01665 at AX=5700h)
 1Ch    DWORD   (big-endian) date and time of last update (see #01846)
 20h    DWORD   (big-endian) object ID of owner
 24h    DWORD   (big-endian) date and time last archived (see #01846)
 28h 55 BYTEs   reserved
Note:   the official documentation erroneously lists the field at offset 04h as
          15 bytes and thus shifts the remaining fields by one byte
SeeAlso: #01903,#02165
--------N-21E3--SF10-------------------------
INT 21 - Novell NetWare - FILE SERVICES - SET FILE INFORMATION
        AH = E3h subfn 10h
        DS:SI -> request buffer (see #01905)
        ES:DI -> reply buffer (see #01906)
Return: AL = status
            00h successful
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
        the caller must have modify privileges on the directory containing the
          file
SeeAlso: AH=B6h,AH=E3h/SF=0Fh,AX=F217h/SF=10h

Format of NetWare "Set File Information" request buffer:
Offset  Size    Description     (Table 01905)
 00h    WORD    length of following data (max 151h)
 02h    BYTE    10h (subfunction "Set File Information")
 03h    BYTE    file attributes (see #01420 at AX=4301h)
 04h    BYTE    extended file attributes (see #01804 at AH=B6h)
 05h  4 BYTEs   reserved
 09h    WORD    (big-endian) file's creation date (see #01666 at AX=5700h)
 0Bh    WORD    (big-endian) date of last access (see #01665 at AX=5700h)
 0Dh    DWORD   (big-endian) date and time of last update (see #01846)
 11h    DWORD   (big-endian) object ID of owner
 15h    DWORD   (big-endian) date and time last archived (see #01846)
 19h 56 BYTEs   reserved
 51h    BYTE    directory handle or 00h
 52h    BYTE    search attributes (see #01420 at AX=4301h)
 53h    BYTE    length of filename
 54h  N BYTEs   filename
SeeAlso: #01906

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01906)
 00h    WORD    (call) 0000h (no results returned)
SeeAlso: #01905
--------N-21E3--SF11-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET FILE SERVER INFORMATION
        AH = E3h subfn 11h
        DS:SI -> request buffer (see #01907)
        ES:DI -> reply buffer (see #01908)
Return: AL = status
            00h successful
Desc:   determine the version of software installed on the file server and
          how it is configured
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: AH=E3h/SF=0Eh,AH=E3h/SF=12h,AH=E3h/SF=CDh,AH=E3h/SF=D3h,AH=E3h/SF=E7h
SeeAlso: AH=E7h"Novell",AX=F217h/SF=11h

Format of NetWare "Get File Server Information" request buffer:
Offset  Size    Description     (Table 01907)
 00h    WORD    0001h (length of following data)
 02h    BYTE    11h (subfunction "Get File Server Information")
SeeAlso: #01908,#02166 at AX=F217h/SF=11h

Format of NetWare "Get File Server Information" reply buffer:
Offset  Size    Description     (Table 01908)
 00h    WORD    (call) 0080h (size of following results buffer)
 02h 48 BYTEs   server's name
 32h    BYTE    NetWare version
 33h    BYTE    NetWare subversion (0-99)
 34h    WORD    (big-endian) number of connections supported
                NetWare 4.01 reportedly returns maximum simulataneously-used
                  connections
 36h    WORD    (big-endian) number of connections in use
 38h    WORD    (big-endian) maximum connected volumes
---Advanced NetWare 2.1+ ---
 3Ah    BYTE    operating system revision number
 3Bh    BYTE    fault tolerance (SFT) level
 3Ch    BYTE    TTS level
 3Dh    WORD    (big-endian) maximum simultaneously-used connections
                NetWare 4.01 reportedly returns number of connections in use
 3Fh    BYTE    accounting version
 40h    BYTE    VAP version
 41h    BYTE    queueing version
 42h    BYTE    print server version
 43h    BYTE    virtual console version
 44h    BYTE    security restrictions level
 45h    BYTE    internetwork bridge version
 46h 60 BYTEs   reserved
SeeAlso: #01907,#02166
--------N-21E3--SF12-------------------------
INT 21 - Novell NetWare - GET NETWORK SERIAL NUMBER
        AH = E3h subfn 12h
        AL = 00h
        BX = CX = DX = 0000h
        DS:SI -> request buffer (see #01909)
        ES:DI -> reply buffer (see #01910)
Return: AL = status
            00h successful
Desc:   return the serial number and application number for the software
          installed on the file server
Notes:  this function is supported by Advanced NetWare 2.1+
        reportedly, the workstation crashes if AL,BX,CX, and DX are not all
          zero
SeeAlso: AH=E3h/SF=0Ch,AH=E3h/SF=11h,AX=F217h/SF=12h

Format of NetWare "Get Serial Number" request buffer:
offset   size   description     (Table 01909)
 00h     WORD   0001h (length of following data)
 02h     BYTE   12h (subfunction "Get Serial Number")
SeeAlso: #01910,#02167

Format of NetWare "Get Serial Number" reply buffer:
offset   size   description     (Table 01910)
 00h     WORD   (call) 0006h (size of following results buffer)
 02h   4 BYTEs  (big-endian) NetWare server serial number
 06h   2 BYTEs  (big-endian) NetWare application serial number
SeeAlso: #01909,#02167
--------N-21E3--SF13-------------------------
INT 21 - Novell NetWare - CONNECTION SERVICES - GET INTERNET ADDRESS (OLD)
        AH = E3h subfn 13h
        DS:SI -> request buffer (see #01911)
        ES:DI -> reply buffer (see #01912)
Return: AL = status
            00h successful
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=DCh"NetWare",AH=E3h/SF=16h,AH=EEh"NetWare",AX=F217h/SF=13h

Format of NetWare "Get Internet Address (old)" request buffer:
Offset  Size    Description     (Table 01911)
 00h    WORD    0002h (length of following data)
 02h    BYTE    13h (subfunction "Get Internet Address")
 03h    BYTE    logical connection number (01h-64h)
SeeAlso: #01912,#02168

Format of NetWare "Get Internet Address (old)" reply buffer:
Offset  Size    Description     (Table 01912)
 00h    WORD    (call) 000Ch (length of following results buffer)
 02h  4 BYTEs   network number
 06h  6 BYTEs   physical node address
 0Ch  2 BYTEs   socket number
SeeAlso: #01911,#02168 at AX=F217h/SF=13h
--------N-21E3--SF14-------------------------
INT 21 - Novell NetWare - CONNECTION SERVICES - LOGIN TO FILE SERVER
        AH = E3h subfn 14h
        DS:SI -> request buffer (see #01913)
        ES:DI -> reply buffer (see #01914)
Return: AL = status
            00h successful
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=D7h"NetWare",AH=F1h"NetWare",AX=F217h/SF=14h

Format of NetWare "Login to File Server" request buffer:
Offset  Size    Description     (Table 01913)
 00h    WORD    length of following data (max B3h)
 02h    BYTE    14h (subfunction "Login To File Server")
 03h    WORD    (big-endian) type of object
 05h    BYTE    length of object's name (01h-2Fh)
 06h  N BYTEs   object's name
        BYTE    length of password
      N BYTEs   password
SeeAlso: #01914

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01914)
 00h    WORD    (call) 0000h (no data returned)
SeeAlso: #01913
--------N-21E3--SF15-------------------------
INT 21 - Novell NetWare - CONNECTION SERVICES - GET OBJECT CONNECTION LIST(OLD)
        AH = E3h subfn 15h
        DS:SI -> request buffer (see #01915)
        ES:DI -> reply buffer (see #01916)
Return: AL = status
            00h successful
Desc:   this function retrieves a list indicating the connection numbers under
          which a bindery object is logged into the default file server
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=DCh"NetWare",AH=E3h/SF=16h,AX=F217h/SF=15h

Format of NetWare "Get Object Connection Numbers" request buffer:
Offset  Size    Description     (Table 01915)
 00h    WORD    length of following data (max 33h)
 02h    BYTE    15h (subfunction "Get Object Connection Numbers")
 03h    WORD    (big-endian) type of object
 05h    BYTE    length of object's name (01h-2Fh)
 06h  N BYTEs   object's name
SeeAlso: #01916,#02169

Format of NetWare "Get Object Connection Numbers" reply buffer:
Offset  Size    Description     (Table 01916)
 00h    WORD    (call) length of following results buffer (max 65h)
 02h    BYTE    number of connections
 03h  N BYTEs   connection list
SeeAlso: #01915,#02169
--------N-21E3--SF16-------------------------
INT 21 - Novell NetWare - CONNECTION SERVICES - GET CONNECTION INFORMATION
        AH = E3h subfn 16h
        DS:SI -> request buffer (see #01917)
        ES:DI -> reply buffer (see #01918)
Return: AL = status
            00h successful
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=D7h,AH=DCh"NetWare",AH=E3h/SF=14h

Format of NetWare "Get Connection Information" request buffer:
Offset  Size    Description     (Table 01917)
 00h    WORD    0002h (length of following data)
 02h    BYTE    16h (subfunction "Get Connection Information")
 03h    BYTE    logical connection number (01h-64h)

Format of NetWare "Get Connection Information" reply buffer:
Offset  Size    Description     (Table 01918)
 00h    WORD    (call) 003Eh (length of following results buffer)
 02h    DWORD   (big-endian) object ID for object logged in on the connection
                00000000h if no object logged in
 06h    WORD    (big-endian) type of object
 08h 48 BYTEs   name of object
 38h  7 BYTEs   login time (see #01919)
Note:   much of the Novell documentation incorrectly states the reply buffer
          length as 3Fh instead of 40h, which corresponds to a results length
          of 3Dh (61) bytes instead of the correct 3Eh (62) bytes

Format of NetWare login time:
Offset  Size    Description     (Table 01919)
 00h    BYTE    year (80-99 = 1980-1999, 00-79 = 2000-2079)
 01h    BYTE    month (1-12)
 02h    BYTE    day (1-31)
 03h    BYTE    hour (0-23)
 04h    BYTE    minute (0-59)
 05h    BYTE    second (0-59)
 06h    BYTE    day of week (0 = Sunday)
--------N-21E3--SF32-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - CREATE BINDERY OBJECT
        AH = E3h subfn 32h
        DS:SI -> request buffer (see #01921)
        ES:DI -> reply buffer (see #01922)
Return: AL = status (see #01920)
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E3h/SF=33h,AH=E3h/SF=34h,AH=E3h/SF=38h,AH=E3h/SF=39h
SeeAlso: AX=F217h/SF=32h

(Table 01920)
Values for NetWare function status:
 00h    successful
 96h    server out of memory
 EEh    object already exists
 EFh    invalid name
 F0h    wildcard not allowed
 F1h    invalid bindery security level
 F3h    not permitted to rename object
 F4h    not permitted to delete objects
 F5h    not permitted to create objects
 FCh    no such object
 FEh    server bindery locked
 FFh    bindery failure
SeeAlso: #01902,#01927

Format of NetWare "Create Bindery Object" request buffer:
Offset  Size    Description     (Table 01921)
 00h    WORD    length of following data (max 35h)
 02h    BYTE    32h (subfunction "Create Bindery Object")
 03h    BYTE    object flag (00h static, 01h dynamic)
 04h    BYTE    object security levels
 05h    WORD    (big-endian) type of object
 07h    BYTE    length of object's name
 08h  N BYTEs   object's name
SeeAlso: #01922

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01922)
 00h    WORD    0000h (no data returned)
SeeAlso: #01921,#01923,#01924
--------N-21E3--SF33-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - DELETE BINDERY OBJECT
        AH = E3h subfn 33h
        DS:SI -> request buffer (see #01923)
        ES:DI -> reply buffer (see #01922)
Return: AL = status (see #01920)
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E3h/SF=32h,AH=E3h/SF=34h,AX=F217h/SF=33h

Format of NetWare "Delete Bindery Object" request buffer:
Offset  Size    Description     (Table 01923)
 00h    WORD    length of following data (max 33h)
 02h    BYTE    33h (subfunction "Delete Bindery Object")
 03h    WORD    (big-endian) type of object
 05h    BYTE    length of object's name (01h-2Fh)
 06h  N BYTEs   object's name
SeeAlso: #01922
--------N-21E3--SF34-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - RENAME BINDERY OBJECT
        AH = E3h subfn 34h
        DS:SI -> request buffer (see #01924)
        ES:DI -> reply buffer (see #01922)
Return: AL = status (see #01920)
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E3h/SF=32h,AH=E3h/SF=33h,AX=F217h/SF=34h

Format of NetWare "Rename Bindery Object" request buffer:
Offset  Size    Description     (Table 01924)
 00h    WORD    length of following data (max 63h)
 02h    BYTE    34h (subfunction "Rename Bindery Object")
 03h    WORD    (big-endian) type of object
 05h    BYTE    length of object's name (01h-2Fh)
 06h  N BYTEs   object's name
        BYTE    length of new name (01h-2Fh)
      N BYTEs   new name
SeeAlso: #01922
--------N-21E3--SF35-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - GET BINDERY OBJECT ID
        AH = E3h subfn 35h
        DS:SI -> request buffer (see #01925)
        ES:DI -> reply buffer (see #01926)
Return: AL = status (00h,96h,FCh,FEh,FFh) (see #01927)
Notes:  this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
        the requesting workstation must be logged into the file server with
          read access to the bindery object
SeeAlso: AH=E3h/SF=36h,AH=E3h/SF=44h,AX=F217h/SF=35h

Format of NetWare "Get Bindery Object ID" request buffer:
Offset  Size    Description     (Table 01925)
 00h    WORD    length of following data (max 33h)
 02h    BYTE    35h (subfunction "Get Bindery Object ID")
 03h    WORD    (big-endian) type of object
 05h    BYTE    length of object's name
 06h  N BYTEs   object's name
SeeAlso: #01926,#02184

Format of NetWare "Get Bindery Object ID" reply buffer:
Offset  Size    Description     (Table 01926)
 00h    WORD    (call) 0036h (length of following buffer space)
 02h    DWORD   (big-endian) object ID
 06h    WORD    (big-endian) type of object
 08h 48 BYTEs   object name
SeeAlso: #01925,#02184 at AX=F217h/SF=35h
--------N-21E3--SF36-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - GET BINDERY OBJECT NAME
        AH = E3h subfn 36h
        DS:SI -> request buffer (see #01928)
        ES:DI -> reply buffer (see #01929)
Return: AL = status (see #01927)
Notes:  this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
        the requesting workstation must be logged into the file server with
          read access to the bindery object
SeeAlso: AH=E3h/SF=35h,AH=E3h/SF=44h,AX=F217h/SF=36h

(Table 01927)
Values for NetWare function status:
 00h    successful
 96h    server out of memory
 EFh    invalid name
 F0h    wildcard not allowed
 FCh    no such object
 FEh    server bindery locked
 FFh    bindery failure
SeeAlso: #01920,#01933

Format of NetWare "Get Bindery Object Name" request buffer:
Offset  Size    Description     (Table 01928)
 00h    WORD    0005h (length of following data)
 02h    BYTE    36h (subfunction "Get Bindery Object Name")
 03h    DWORD   (big-endian) object ID
SeeAlso: #01929,#02185 at AX=F217h/SF=36h

Format of NetWare "Get Bindery Object Name" reply buffer:
Offset  Size    Description     (Table 01929)
 00h    WORD    (call) 0036h (length of following buffer space)
 02h    DWORD   (big-endian) object ID
 06h    WORD    (big-endian) type of object
 08h 48 BYTEs   object name
SeeAlso: #01928,#02185
--------N-21E3--SF37-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - SCAN BINDERY OBJECT
        AH = E3h subfn 37h
        DS:SI -> request buffer (see #01930)
        ES:DI -> reply buffer (see #01931)
Return: AL = status (see #01927)
Notes:  this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
        the requesting workstation must be logged into the file server with
          read access to the bindery object
SeeAlso: AH=E3h/SF=32h,AH=E3h/SF=33h,AH=E3h/SF=38h,AH=E3h/SF=3Ch
SeeAlso: AX=F217h/SF=37h

Format of NetWare "Scan Bindery Object" request buffer:
Offset  Size    Description     (Table 01930)
 00h    WORD    length of following data (max 37h)
 02h    BYTE    37h (subfunction "Scan Bindery Object")
 03h    DWORD   (big-endian) last object ID
 07h    WORD    (big-endian) type of object
 09h    BYTE    length of object's name
 0Ah  N BYTEs   object's name
SeeAlso: #01931,#02186

Format of NetWare "Scan Bindery Object" reply buffer:
Offset  Size    Description     (Table 01931)
 00h    WORD    (call) 0039h (length of following buffer space)
 02h    DWORD   (big-endian) object ID
                FFFFFFFFh for first call
 06h    WORD    (big-endian) type of object
 08h 48 BYTEs   object name (counted string)
 38h    BYTE    object flag (00h static, 01h dynamic)
 39h    BYTE    object's security levels
 3Ah    BYTE    object properties flag (00h no, FFh yes)
SeeAlso: #01930,#02186
--------N-21E3--SF38-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - CHANGE BINDERY OBJECT SECURITY
        AH = E3h subfn 38h
        DS:SI -> request buffer (see #01932)
        ES:DI -> reply buffer (see #01935)
Return: AL = status (00h,96h,F0h,F1h,FBh,FCh,FEh,FFh) (see #01933)
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E3h/SF=32h,AH=E3h/SF=3Bh,AX=F217h/SF=38h

Format of NetWare "Change Bindery Object Security" request buffer:
Offset  Size    Description     (Table 01932)
 00h    WORD    length of following data (max 34h)
 02h    BYTE    38h (subfunction "Change Bindery Object Security")
 03h    BYTE    new security levels
 04h    WORD    (big-endian) type of object
 06h    BYTE    length of object's name (01h-2Fh)
 07h  N BYTEs   object name
Note:   the object type may not be WILD (FFFFh)
SeeAlso: #01935
--------N-21E3--SF39-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - CREATE PROPERTY
        AH = E3h subfn 39h
        DS:SI -> request buffer (see #01934)
        ES:DI -> reply buffer (see #01935)
Return: AL = status (see #01933)
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E3h/SF=32h,AH=E3h/SF=3Bh,AX=F217h/SF=39h

(Table 01933)
Values for NetWare function status:
 00h    successful
 96h    server out of memory
 EDh    property already exists
 EFh    invalid name
 F0h    wildcard not allowed
 F1h    invalid bindery security level
 F6h    not permitted to delete properties
 F7h    not permitted to create properties
 FBh    no such property
 FCh    no such object
 FEh    server bindery locked
 FFh    bindery failure
SeeAlso: #01927,#01937

Format of NetWare "Create Property" request buffer:
Offset  Size    Description     (Table 01934)
 00h    WORD    length of following data (max 45h)
 02h    BYTE    39h (subfunction "Create Property")
 03h    WORD    (big-endian) type of object
 05h    BYTE    length of object's name (01h-2Fh)
 06h  N BYTEs   object's name
        BYTE    property flags
        BYTE    property security levels
        BYTE    length of property's name (01h-0Fh)
      N BYTEs   property's name
SeeAlso: #01935

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01935)
 00h    WORD    (call) 0000h (no data returned)
SeeAlso: #01932,#01935,#01936
--------N-21E3--SF3A-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - DELETE PROPERTY
        AH = E3h subfn 3Ah
        DS:SI -> request buffer (see #01936)
        ES:DI -> reply buffer (see #01935)
Return: AL = status (see #01933)
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E3h/SF=32h,AH=E3h/SF=39h,AX=F217h/SF=3Ah

Format of NetWare "Delete Property" request buffer:
Offset  Size    Description     (Table 01936)
 00h    WORD    length of following data (max 43h)
 02h    BYTE    3Ah (subfunction "Delete Property")
 03h    WORD    (big-endian) type of object
 05h    BYTE    length of object's name (01h-2Fh)
 06h  N BYTEs   object's name
        BYTE    length of property's name (01h-0Fh)
      N BYTEs   property's name
SeeAlso: #01935
--------N-21E3--SF3B-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - CHANGE PROPERTY SECURITY
        AH = E3h subfn 3Bh
        DS:SI -> request buffer (see #01938)
        ES:DI -> reply buffer (see #01935)
Return: AL = status (see #01937)
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E3h/SF=38h,AX=F217h/SF=3Bh

(Table 01937)
Values for NetWare function status:
 00h    successful
 96h    server out of memory
 F0h    wildcard not allowed
 F1h    invalid bindery security level
 FBh    no such property
 FCh    no such object
 FEh    server bindery locked
 FFh    bindery failure
SeeAlso: #01933,#01941

Format of NetWare "Change Property Security" request buffer:
Offset  Size    Description     (Table 01938)
 00h    WORD    length of following data (max 44h)
 02h    BYTE    3Bh (subfunction "Change Property Security")
 03h    WORD    (big-endian) type of object
 05h    BYTE    length of object's name (01h-2Fh)
 06h  N BYTEs   object name
        BYTE    new property security levels
        BYTE    length of property's name
      N BYTEs   property name
Note:   the object type may not be WILD (FFFFh)
--------N-21E3--SF3C-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - SCAN PROPERTY
        AH = E3h subfn 3Ch
        DS:SI -> request buffer (see #01939)
        ES:DI -> reply buffer (see #01940)
Return: AL = status (00h,96h,F1h,FBh,FCh,FEh,FFh) (see #01937)
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E3h/SF=37h,AH=E3h/SF=3Bh,AX=F217h/SF=3Ch

Format of NetWare "Scan Property" request buffer:
Offset  Size    Description     (Table 01939)
 00h    WORD    length of following data (max 47h)
 02h    BYTE    3Ch (subfunction "Scan Property")
 03h    WORD    (big-endian) type of object
 05h    BYTE    length of object's name (01h-2Fh)
 06h  N BYTEs   object name
        DWORD   (big-endian) sequence number
                FFFFFFFFh for first call
        BYTE    length of property's name (01h-0Fh)
      N BYTEs   property's name
SeeAlso: #01940,#02187

Format of NetWare "Scan Property" reply buffer:
Offset  Size    Description     (Table 01940)
 00h    WORD    (call) 0018h (length of following results buffer)
 02h 16 BYTEs   property name
 12h    BYTE    property flags
 13h    BYTE    property security levels
 14h    DWORD   (big-endian) sequence number
 18h    BYTE    property value flag (00h no, FFh yes)
 19h    BYTE    more properties (00h no, FFh yes)
SeeAlso: #01939,#02187
--------N-21E3--SF3D-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - READ PROPERTY VALUE
        AH = E3h subfn 3Dh
        DS:SI -> request buffer (see #01942)
        ES:DI -> reply buffer (see #01943)
Return: AL = status (see #01941)
Desc:   retrieve one 128-byte segment of the specified property's value
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E3h/SF=39h,AH=E3h/SF=3Ch,AH=E3h/SF=3Eh,AX=F217h/SF=3Dh

(Table 01941)
Values for NetWare function status:
 00h    successful
 96h    server out of memory
 E8h    not item property
 ECh    no such segment
 F0h    wildcard not allowed
 F1h    invalid bindery security level
 F8h    not permitted to write property
 F9h    not permitted to read property
 FBh    no such property
 FCh    no such object
 FEh    server bindery locked
 FFh    bindery failure
SeeAlso: #01937,#01946

Format of NetWare "Read Property Value" request buffer:
Offset  Size    Description     (Table 01942)
 00h    WORD    length of following data (max 44h)
 02h    BYTE    3Dh (subfunction "Read Property Value")
 03h    WORD    (big-endian) type of object
 05h    BYTE    length of object's name (01h-2Fh)
 06h  N BYTEs   object name
        BYTE    segment number (01h on first call, increment until done)
        BYTE    length of property's name (01h-0Fh)
      N BYTEs   property name
SeeAlso: #01943,#02188

Format of NetWare "Read Property Value" reply buffer:
Offset  Size    Description     (Table 01943)
 00h    WORD    (call) 0082h (length of following results buffer)
 02h 128 BYTEs  property's value
 82h    BYTE    more segments (00h no, FFh yes)
 83h    BYTE    property's flags
SeeAlso: #01942,#02188
--------N-21E3--SF3E-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - WRITE PROPERTY VALUE
        AH = E3h subfn 3Eh
        DS:SI -> request buffer (see #01944)
        ES:DI -> reply buffer (see #01945)
Return: AL = status (see #01941)
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E3h/SF=39h,AH=E3h/SF=3Ch,AH=E3h/SF=3Dh,AX=F217h/SF=3Eh

Format of NetWare "Write Property Value" request buffer:
Offset  Size    Description     (Table 01944)
 00h    WORD    length of following data (max C5h)
 02h    BYTE    3Eh (subfunction "Write Property Value")
 03h    WORD    (big-endian) type of object
 05h    BYTE    length of object's name (01h-2Fh)
 06h  N BYTEs   object name
        BYTE    segment number (01h on first call, increment until done)
        BYTE    erase remaining segments (00h no, FFh yes)
        BYTE    length of property's name (01h-0Fh)
      N BYTEs   property name
    128 BYTEs   property value segment
SeeAlso: #01945

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01945)
 00h    WORD    (call) 0000h (no data returned)
SeeAlso: #01944,#01947
--------N-21E3--SF3F-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - VERIFY BINDERY OBJECT PASSWORD
        AH = E3h subfn 3Fh
        DS:SI -> request buffer (see #01947)
        ES:DI -> reply buffer (see #01945)
Return: AL = status (see #01946)
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E3h/SF=40h,AX=F217h/SF=3Fh

(Table 01946)
Values for NetWare function status:
 00h    successful
 96h    server out of memory
 F0h    wildcard not allowed
 FBh    no such property
 FCh    no such object
 FEh    server bindery locked
 FFh    bindery failure: no such object, bad password, no password for object,
          or invalid old password
SeeAlso: #01941,#01950

Format of NetWare "Verify Bindery Object Password" request buffer:
Offset  Size    Description     (Table 01947)
 00h    WORD    length of following data (max 133h)
 02h    BYTE    3Fh (subfunction "Verify Bindery Object Password")
 03h    WORD    (big-endian) type of object
 05h    BYTE    length of object's name (01h-2Fh)
 06h  N BYTEs   object name
        BYTE    length of password (00h-7Fh)
      N BYTEs   password
SeeAlso: #01945
--------N-21E3--SF40-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - CHANGE BINDERY OBJECT PASSWORD
        AH = E3h subfn 40h
        DS:SI -> request buffer (see #01948)
        ES:DI -> reply buffer (see #01949)
Return: AL = status (see #01946)
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E3h/SF=3Fh,AH=E3h/SF=41h,AX=F217h/SF=40h

Format of NetWare "Change Bindery Object Password" request buffer:
Offset  Size    Description     (Table 01948)
 00h    WORD    length of following data (max 133h)
 02h    BYTE    40h (subfunction "Change Bindery Object Password")
 03h    WORD    (big-endian) type of object
 05h    BYTE    length of object's name (01h-2Fh)
 06h  N BYTEs   object name
        BYTE    length of old password (00h-7Fh)
      N BYTEs   old password
        BYTE    length of new password (00h-7Fh)
      N BYTEs   new password
SeeAlso: #01949,#02195

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01949)
 00h    WORD    (call) 0000h (no data returned)
SeeAlso: #01948,#01951
--------N-21E3--SF41-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - ADD BINDERY OBJECT TO SET
        AH = E3h subfn 41h
        DS:SI -> request buffer (see #01951)
        ES:DI -> reply buffer (see #01949)
Return: AL = status (see #01950)
Desc:   add the specified object to an object's group property
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E3h/SF=40h,AH=E3h/SF=42h,AH=E3h/SF=43h,AX=F217h/SF=41h

(Table 01950)
Values for NetWare function status:
 00h    successful
 96h    server out of memory
 E9h    member already exists
 EAh    member does not exist
 EBh    not a group property
 F0h    wildcard not allowed
 F8h    can't write property
 F9h    not permitted to read property
 FBh    no such property
 FCh    no such object
 FEh    server bindery locked
 FFh    bindery failure
SeeAlso: #01946,#01961

Format of NetWare "Add Bindery Object to Set" request buffer:
Offset  Size    Description     (Table 01951)
 00h    WORD    length of following data (max 75h)
 02h    BYTE    41h (subfunction "Add Bindery Object to Set")
 03h    WORD    (big-endian) type of object
 05h    BYTE    length of object's name
 06h  N BYTEs   object name
        BYTE    length of property name (01h-0Fh)
      N BYTEs   property name
        WORD    (big-endian) type of member object
        BYTE    length of member object's name
      N BYTEs   member object's name
SeeAlso: #01949
--------N-21E3--SF42-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - DELETE BINDERY OBJECT FROM SET
        AH = E3h subfn 42h
        DS:SI -> request buffer (see #01952)
        ES:DI -> reply buffer (see #01953)
Return: AL = status (see #01950)
Desc:   delete the specified object from a set property
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E3h/SF=40h,AH=E3h/SF=42h,AH=E3h/SF=43h,AX=F217h/SF=42h

Format of NetWare "Delete Bindery Object from Set" request buffer:
Offset  Size    Description     (Table 01952)
 00h    WORD    length of following data (max 75h)
 02h    BYTE    42h (subfunction "Delete Bindery Object from Set")
 03h    WORD    (big-endian) type of object
 05h    BYTE    length of object's name
 06h  N BYTEs   object name
        BYTE    length of property name (01h-0Fh)
      N BYTEs   property name
        WORD    (big-endian) type of member object
        BYTE    length of member object's name
      N BYTEs   member object's name
SeeAlso: #01953

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01953)
 00h    WORD    (call) 0000h (no data returned)
SeeAlso: #01952,#01954,#01955,#01956
--------N-21E3--SF43-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - IS BINDERY OBJECT IN SET
        AH = E3h subfn 43h
        DS:SI -> request buffer (see #01954)
        ES:DI -> reply buffer (see #01953)
Return: AL = status (see #01950)
Desc:   determine whether the specified object is a member of the given set
          property
Notes:  this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
        the caller must have read access to the property
SeeAlso: AH=E3h/SF=41h,AH=E3h/SF=42h,AX=F217h/SF=43h

Format of NetWare "Is Bindery Object in Set?" request buffer:
Offset  Size    Description     (Table 01954)
 00h    WORD    length of following data (max 75h)
 02h    BYTE    43h (subfunction "Is Bindery Object In Set")
 03h    WORD    (big-endian) type of object
 05h    BYTE    length of object's name
 06h  N BYTEs   object's name
        BYTE    length of property's name
      N BYTEs   property's name
        WORD    (big-endian) type of member object
        BYTE    length of member object's name
      N BYTEs   member object's name
SeeAlso: #01953
--------N-21E3--SF44-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - CLOSE BINDERY
        AH = E3h subfn 44h
        DS:SI -> request buffer (see #01955)
        ES:DI -> reply buffer (see #01953)
Return: AL = status
            00h successful
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E3h/SF=45h,AX=F217h/SF=44h

Format of NetWare "Close Bindery" request buffer:
Offset  Size    Description     (Table 01955)
 00h    WORD    0001h (length of following data)
 02h    BYTE    44h (subfunction "Close Bindery")
SeeAlso: #01953,#01956
--------N-21E3--SF45-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - OPEN BINDERY
        AH = E3h subfn 45h
        DS:SI -> request buffer (see #01956)
        ES:DI -> reply buffer (see #01953)
Return: AL = status
            00h successful
Notes:  this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
        the bindery may only be opened by the supervisor or an object with
          equivalent privileges
SeeAlso: AH=E3h/SF=44h,AX=F217h/SF=45h

Format of NetWare "Open Bindery" request buffer:
Offset  Size    Description     (Table 01956)
 00h    WORD    0001h (length of following data)
 02h    BYTE    45h (subfunction "Open Bindery")
SeeAlso: #01953,#01955
--------N-21E3--SF46-------------------------
INT 21 - Novell NetWare - BINDERY SERVICES - GET BINDERY ACCESS LEVEL
        AH = E3h subfn 46h
        DS:SI -> request buffer (see #01957)
        ES:DI -> reply buffer (see #01958)
Return: AL = status
            00h successful
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AX=F217h/SF=46h

Format of NetWare "Get Bindery Access Level" request buffer:
Offset  Size    Description     (Table 01957)
 00h    WORD    0001h (length of following data)
 02h    BYTE    46h (subfunction "Get Bindery Access Level")
SeeAlso: #01958,#02189

Format of NetWare "Get Bindery Access Level" reply buffer:
Offset  Size    Description     (Table 01958)
 00h    WORD    0005h (length of following buffer)
 02h    BYTE    security levels
 03h    DWORD   (big-endian) object ID
SeeAlso: #01957,#02189
--------N-21E3--SF47-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - SCAN BINDERY OBJ TRUSTEE PATHS
        AH = E3h subfn 47h
        DS:SI -> request buffer (see #01959)
        ES:DI -> reply buffer (see #01960)
Return: AL = status (00h,96h,F0h,F1h,FCh,FEh,FFh) (see #01961)
Desc:   iterate through the directories to which an object is a trustee
Note:   this function is supported by Advanced NetWare 1.0+ and Alloy NTNX
SeeAlso: AH=E2h/SF=0Ch,AH=E2h/SF=0Dh,AH=E2h/SF=0Eh,AX=F217h/SF=47h

Format of NetWare "Scan Bindery Object Trustee Paths" request buffer:
Offset  Size    Description     (Table 01959)
 00h    WORD    0008h (length of following data)
 02h    BYTE    47h (subfunction "Scan Bindery Object Trustee Paths")
 03h    BYTE    volume number (00h-1Fh)
 04h    WORD    (big-endian) last sequence number (FFFFh on first call)
 06h    DWORD   (big-endian) object ID
SeeAlso: #01960,#02190

Format of NetWare "Scan Bindery Object Trustee Paths" reply buffer:
Offset  Size    Description     (Table 01960)
 00h    WORD    (call) length of following results buffer (max 107h)
 02h    WORD    (big-endian) next sequence number
 04h    DWORD   (big-endian) object ID
 08h    BYTE    trustee directory rights (see #01849 at AH=E2h/SF=03h)
 09h    BYTE    length of trustee path
 0Ah  N BYTEs   trustee path
SeeAlso: #01959,#02190
--------N-21E3--SF64-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - CREATE QUEUE
        AH = E3h subfn 64h
        DS:SI -> request buffer (see #01962)
        ES:DI -> reply buffer (see #01963)
Return: AL = status (00h,96h,99h,9Bh,9Ch,EDh-F1h,F5h,F7h,FCh,FEh,FFh)
              (see #01961)
Notes:  this function is supported by Advanced NetWare 2.1+
        caller must be on a workstation with supervisor privileges
SeeAlso: AH=E3h/SF=65h,AH=E3h/SF=66h,AH=E3h/SF=68h,AH=E3h/SF=6Bh
SeeAlso: AX=F217h/SF=64h

(Table 01961)
Values for NetWare function status:
 00h (0)        successful
 96h (150)      server out of memory
 99h (153)      directory full
 9Bh (155)      invalid directory handle
 9Ch (156)      invalid path
 D0h (208)      queue error
 D1h (209)      no such queue
 D2h (210)      no server for queue
 D3h (211)      no queue rights
 D4h (212)      queue full
 D5h (213)      no queue job
 D6h (214)      no job rights
 D7h (215)      queue servicing error
 D8h (216)      queue not active
 D9h (217)      station is not a server
 DAh (218)      queue halted
 DBh (219)      too many queue servers
 EDh (237)      property already exists
 EEh (238)      object already exists
 EFh (239)      invalid name
 F0h (240)      wildcard not allowed
 F1h (241)      invalid bindery security level
 F5h (245)      not permitted to create object
 F7h (247)      not permitted to create property
 FCh (252)      no such object
 FEh (254)      server bindery locked
 FFh (255)      bindery failure
SeeAlso: #01950,#02002,#01680,#02860 at INT 2F/AX=7A20h/BX=0000h

Format of NetWare "Create Queue" request buffer:
Offset  Size    Description     (Table 01962)
 00h    WORD    length of following data (max ABh)
 02h    BYTE    64h (subfunction "Create Queue")
 03h    WORD    (big-endian) queue type
 05h    BYTE    length of queue's name (01h-2Fh)
 06h  N BYTEs   queue's name
        BYTE    directory handle or 00h
        BYTE    length of path name (01h-76h)
      N BYTEs   path name of directory in which to create queue subdirectory
SeeAlso: #01963,#02198

Format of NetWare "Create Queue" reply buffer:
Offset  Size    Description     (Table 01963)
 00h    WORD    (call) 0004h (size of following results buffer)
 02h    DWORD   (big-endian) object ID of queue
SeeAlso: #01962,#02198
--------N-21E3--SF65-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - DESTROY QUEUE
        AH = E3h subfn 65h
        DS:SI -> request buffer (see #01964)
        ES:DI -> reply buffer (see #01969)
Return: AL = status (00h,96h,9Ch,D0h,D1h,FFh) (see also AH=E3h/SF=64h)
            FFh hardware failure
Desc:   abort all active jobs, detach all job servers, remove all job entries,
          delete all job files, remove the queue object and its properties
          from the bindery, and delete the queue's subdirectory
Notes:  this function is supported by Advanced NetWare 2.1+
        caller must have SUPERVISOR privileges
SeeAlso: AH=E3h/SF=64h,AH=E3h/SF=66h,AH=E3h/SF=68h,AH=E3h/SF=6Ah,AH=E3h/SF=70h
SeeAlso: AX=F217h/SF=65h

Format of NetWare "Destroy Queue" request buffer:
Offset  Size    Description     (Table 01964)
 00h    WORD    0005h (length of following data)
 02h    BYTE    65h (subfunction "Destroy Queue")
 03h    DWORD   (big-endian) object ID of queue
SeeAlso: #01969
--------N-21E3--SF66-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - READ QUEUE CURRENT STATUS (OLD)
        AH = E3h subfn 66h
        DS:SI -> request buffer (see #01965)
        ES:DI -> reply buffer (see #01966)
Return: AL = status (00h,96h,9Ch,D1h-D3h,F1h,FCh,FEh,FFh) (see #01961)
Notes:  this function is supported by Advanced NetWare 2.1+
        caller must be on a workstation which is security-equivalent to a
          member of the queue's Q_USERS or Q_OPERATORS properties
SeeAlso: AH=E3h/SF=64h,AH=E3h/SF=67h,AH=E3h/SF=6Fh,AH=E3h/SF=76h
SeeAlso: AX=F217h/SF=66h

Format of NetWare "Read Queue Current Status (old)" request buffer:
Offset  Size    Description     (Table 01965)
 00h    WORD    0005h (length of following data)
 02h    BYTE    66h (subfunction "Read Queue Current Status")
 03h    DWORD   (big-endian) object ID of queue
SeeAlso: #01966,#02199 at AX=F217h/SF=66h

Format of NetWare "Read Queue Current Status (old)" reply buffer:
Offset  Size    Description     (Table 01966)
 00h    WORD    (call) 0085h (size of following results)
 02h    DWORD   (big-endian) object ID of queue
 06h    BYTE    status of queue (see #01967)
 07h    BYTE    number of jobs in queue (00h-FAh)
 08h    BYTE    number of servers attached to queue (00h-19h)
 09h 25 DWORDs  list of object IDs of attached servers
 6Dh 25 BYTEs   list of attached servers' stations
 86h    BYTE    (call) maximum number of servers to return
SeeAlso: #01965,#02199 at AX=F217h/SF=66h

Bitfields for NetWare queue status:
Bit(s)  Description     (Table 01967)
 0      operator disabled addition of new jobs
 1      operator refuses additional job servers attaching
 2      operator disabled job servicing
SeeAlso: #01966,#01968
--------N-21E3--SF67-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - SET QUEUE CURRENT STATUS (OLD)
        AH = E3h subfn 67h
        DS:SI -> request buffer (see #01968)
        ES:DI -> reply buffer (see #01969)
Return: AL = status (00h,96h,9Ch,D0h,D1h,D3h,FEh,FFh) (see #01961)
Notes:  this function is supported by Advanced NetWare 2.1+
        caller must have operator privileges
SeeAlso: AH=E3h/SF=64h,AH=E3h/SF=66h,AH=E3h/SF=6Fh,AH=E3h/SF=76h
SeeAlso: AX=F217h/SF=67h

Format of NetWare "Set Queue Current Status (old)" request buffer:
Offset  Size    Description     (Table 01968)
 00h    WORD    0006h (length of following data)
 02h    BYTE    67h (subfunction "Set Queue Current Status")
 03h    DWORD   (big-endian) object ID of queue
 07h    BYTE    queue status (see #01967)
SeeAlso: #01969

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01969)
 00h    WORD    (call) 0000h (no results returned)
--------N-21E3--SF68-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - CREATE QUEUE JOB AND FILE
        AH = E3h subfn 68h
        DS:SI -> request buffer (see #01970)
        ES:DI -> reply buffer (see #01972)
Return: AL = status (00h,96h,99h,9Ch,D0h-D4h,DAh,EDh,EFh-F1h,F7h,FCh,FEh,FFh)
                (see #01961)
Notes:  this function is supported by Advanced NetWare 2.1+
        caller must be on a workstation which is security-equivalent to a
          member of the queue's Q_USER property
SeeAlso: AX=B807h,AH=E0h"SPOOLING",AH=E3h/SF=69h,AH=E3h/SF=6Ah,AH=E3h/SF=6Eh
SeeAlso: AX=F217h/SF=68h

Format of NetWare "Create Queue Job and File" request buffer:
Offset  Size    Description     (Table 01970)
 00h    WORD    0107h (length of following data)
 02h    BYTE    68h (subfunction "Close File and Start Queue Job")
 03h    DWORD   (big-endian) object ID of queue
 07h 256 BYTEs  job structure (see #01971)
SeeAlso: #01972,#02200

Format of NetWare old-style job structure:
Offset  Size    Description     (Table 01971)
 00h    BYTE    client station
 01h    BYTE    client task number
 02h    DWORD   (big-endian) object ID of client
 06h    DWORD   (big-endian) object ID of target server
                FFFFFFFh if any server acceptable
 0Ah  6 BYTEs   target execution time (year,month,day,hour,minute,second)
                FFFFFFFFFFFFh to execute as soon as possible
 10h  6 BYTEs   job entry time (year,month,day,hour,minute,second)
 16h    WORD    (big-endian) job number
 18h    WORD    (big-endian) job type
 1Ah    BYTE    job position
 1Bh    BYTE    job control flags (see #01980)
 1Ch 14 BYTEs   ASCIZ job file name
 2Ah  6 BYTEs   job file handle
 30h    BYTE    server station
 31h    BYTE    server task number
 32h    DWORD   (big-endian) object ID of server
 36h 50 BYTEs   ASCIZ job description string
 68h 152 BYTEs  client record area
SeeAlso: #01970,#02210

Format of NetWare "Create Queue Job and File" reply buffer:
Offset  Size    Description     (Table 01972)
 00h    WORD    (call) 0036h (size of following results buffer)
 02h    BYTE    client station
 03h    BYTE    client task number
 04h    DWORD   (big-endian) object ID of client
 08h    DWORD   (big-endian) object ID of target server
 0Ch  6 BYTEs   target execution time (year,month,day,hour,minute,second)
 12h  6 BYTEs   job entry time (year,month,day,hour,minute,second)
 18h    WORD    (big-endian) job number
 1Ah    WORD    (big-endian) job type
 1Ch    BYTE    job position
 1Dh    BYTE    job control flags (see #01980)
 1Eh 14 BYTEs   ASCIZ job file name
 2Ch  6 BYTEs   job file handle
 32h    BYTE    server station
 33h    BYTE    server task number
 34h    DWORD   (big-endian) object ID of server or 00000000h
SeeAlso: #01970,#02200
--------N-21E3--SF69-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - CLOSE FILE AND START QUEUE JOB (OLD)
        AH = E3h subfn 69h
        DS:SI -> request buffer (see #01973)
        ES:DI -> reply buffer (see #01974)
Return: AL = status (00h,96h,D0h,D1h,D3h,D5h,D6h,FEh,FFh) (see #01961)
Notes:  this function is supported by Advanced NetWare 2.1+
        caller must be on the workstation which created the job
SeeAlso: AH=E3h/SF=68h,AH=E3h/SF=6Ah,AH=E3h/SF=6Eh,AX=F217h/SF=69h

Format of NetWare "Close File and Start Queue Job (old)" request buffer:
Offset  Size    Description     (Table 01973)
 00h    WORD    0007h (length of following data)
 02h    BYTE    69h (subfunction "Close File and Start Queue Job")
 03h    DWORD   (big-endian) object ID of queue
 07h    WORD    (big-endian) job number
SeeAlso: #01974

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01974)
 00h    WORD    (call) 0000h (no results returned)
SeeAlso: #01973,#01975
--------N-21E3--SF6A-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - REMOVE JOB FROM QUEUE (OLD)
        AH = E3h subfn 6Ah
        DS:SI -> request buffer (see #01975)
        ES:DI -> reply buffer (see #01974)
Return: AL = status (00h,96h,D0h,D1h,D5h,D6h,FEh,FFh) (see #01961)
Notes:  this function is supported by Advanced NetWare 2.1+
        caller must have created the job or be an operator
SeeAlso: AH=E3h/SF=68h,AH=E3h/SF=6Ah,AH=E3h/SF=6Eh,AX=F217h/SF=6Ah

Format of NetWare "Remove Job From Queue (old)" request buffer:
Offset  Size    Description     (Table 01975)
 00h    WORD    0007h (length of following data)
 02h    BYTE    6Ah (subfunction "Remove Job From Queue (old)")
 03h    DWORD   (big-endian) object ID of queue
 07h    WORD    (big-endian) job number
--------N-21E3--SF6B-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - GET QUEUE JOB LIST (OLD)
        AH = E3h subfn 6Bh
        DS:SI -> request buffer (see #01976)
        ES:DI -> reply buffer (see #01977)
Return: AL = status (00h,96h,9Ch,D0h-D3h,FCh,FEh,FFh) (see #01961)
Notes:  this function is supported by Advanced NetWare 2.1+
        caller must be on a workstation which is security-equivalent to a
          member of the Q_USERS or Q_OPERATORS properties
SeeAlso: AH=E3h/SF=68h,AH=E3h/SF=6Ah,AH=E3h/SF=6Eh,AX=F217h/SF=6Bh

Format of NetWare "Get Queue Job List (old)" request buffer:
Offset  Size    Description     (Table 01976)
 00h    WORD    0005h (length of following data)
 02h    BYTE    6Bh (subfunction "Get Queue Job List (old)")
 03h    DWORD   (big-endian) object ID of queue
SeeAlso: #01977

Format of NetWare "Get Queue Job List (old)" reply buffer:
Offset  Size    Description     (Table 01977)
 00h    WORD    (call) size of following results buffer (max 1F6h)
 02h    WORD    (big-endian) job count
 04h  N WORDs   (big-endian) list of job numbers by position in queue
        WORD    maximum job numbers
SeeAlso: #01976
--------N-21E3--SF6C-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - READ QUEUE JOB ENTRY (OLD)
        AH = E3h subfn 6Ch
        DS:SI -> request buffer (see #01978)
        ES:DI -> reply buffer (see #01979)
Return: AL = status (00h,96h,D0h-D3h,D5h,FCh,FEh,FFh) (see #01961)
Notes:  this function is supported by Advanced NetWare 2.1+
        caller must be on a workstation which is security-equivalent to a
          member of the Q_USERS, Q_OPERATORS, or Q_SERVERS properties
SeeAlso: AH=E3h/SF=68h,AH=E3h/SF=6Ah,AH=E3h/SF=6Eh,AX=F217h/SF=6Ch

Format of NetWare "Read Queue Job Entry (old)" request buffer:
Offset  Size    Description     (Table 01978)
 00h    WORD    0007h (length of following data)
 02h    BYTE    6Ch (subfunction "Read Queue Job Entry (old)")
 03h    DWORD   (big-endian) object ID of queue
 07h    WORD    (big-endian) job number
SeeAlso: #01979

Format of NetWare "Read Queue Job Entry (old)" reply buffer:
Offset  Size    Description     (Table 01979)
 00h    WORD    (call) 0100h (size of following results)
 02h    BYTE    client station number
 03h    BYTE    client task number
 04h    DWORD   object ID of client
 08h    DWORD   (big-endian) object ID of target server
                FFFFFFFFh if any server acceptable
 0Ch  6 BYTEs   target execution time (year,month,day,hour,minute,second)
                FFFFFFFFFFFFh if serviced as soon as possible
 12h  6 BYTEs   job entry time (year,month,day,hour,minute,second)
 18h    WORD    (big-endian) job number
 1Ah    WORD    (big-endian) job type
 1Ch    BYTE    job position
 1Dh    BYTE    job control flags (see #01980)
 1Eh 14 BYTEs   ASCIZ job filename
 2Ch  6 BYTEs   job file handle
 32h    BYTE    server station
 33h    BYTE    server task number
 34h    DWORD   object ID of server
 38h 50 BYTEs   ASCIZ job description string
 6Ah 152 BYTEs  client record area
SeeAlso: #01978

Bitfields for NetWare job control flags:
Bit(s)  Description     (Table 01980)
 3      job will be serviced automatically if connection broken
 4      job remains in queue after server aborts job
 5      client has not filled associated job file
 6      User Hold--job advances, but cannot be serviced until this is
          cleared by user or operator
 7      Operator Hold--job advances, but cannot be serviced until this is
          cleared by an operator
SeeAlso: #01979
--------N-21E3--SF6D-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - CHANGE QUEUE JOB ENTRY (OLD)
        AH = E3h subfn 6Dh
        DS:SI -> request buffer (see #01981)
        ES:DI -> reply buffer (see #01983)
Return: AL = status (00h,96h,D0h,D1h,D5h,D7h,FEh,FFh) (see #01961)
Notes:  this function is supported by Advanced NetWare 2.1+
        caller must be an operator or the user who created the job
SeeAlso: AH=E3h/SF=68h,AH=E3h/SF=6Ah,AH=E3h/SF=6Ch,AH=E3h/SF=6Eh
SeeAlso: AX=F217h/SF=6Dh

Format of NetWare "Change Queue Job Entry" request buffer:
Offset  Size    Description     (Table 01981)
 00h    WORD    0105h (length of following data)
 02h    BYTE    6Dh (subfunction "Change Queue Job Entry")
 03h    DWORD   (big-endian) object ID of queue
 07h 256 BYTEs  job structure (see #01971)
SeeAlso: #01983
--------N-21E3--SF6E-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - CHANGE QUEUE JOB POSITION
        AH = E3h subfn 6Eh
        DS:SI -> request buffer (see #01982)
        ES:DI -> reply buffer (see #01983)
Return: AL = status (00h,96h,D0h,D1h,D5h,D6h,FEh,FFh) (see #01961)
Notes:  this function is supported by Advanced NetWare 2.1+
        caller must be an operator
        if the specified position is greater than the number of jobs in the
          queue, the job is placed at the end of the queue
SeeAlso: AH=E3h/SF=68h,AH=E3h/SF=6Ah,AH=E3h/SF=6Ch,AH=E3h/SF=6Dh
SeeAlso: AX=F217h/SF=6Eh

Format of NetWare "Change Queue Job Position" request buffer:
Offset  Size    Description     (Table 01982)
 00h    WORD    0008h (length of following data)
 02h    BYTE    6Eh (subfunction "Change Queue Job Position")
 03h    DWORD   (big-endian) object ID of queue
 07h    WORD    (big-endian) job number
 09h    BYTE    new position in queue
                (01h = first, FAh [250] = last position in full queue)
SeeAlso: #01983

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01983)
 00h    WORD    (call) 0000h (no results returned)
SeeAlso: #01981,#01982,#01984
--------N-21E3--SF6F-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - ATTACH QUEUE SERVER TO QUEUE
        AH = E3h subfn 6Fh
        DS:SI -> request buffer (see #01984)
        ES:DI -> reply buffer (see #01983)
Return: AL = status (00h,96h,9Ch,D0h,D1h,D3h,DAh,DBh,FEh,FFh)
                (see also AH=E3h/SF=64h)
            FFh bindery failure, or no such property, or no such member
Desc:   attach the calling job server to the specified queue
Notes:  this function is supported by Advanced NetWare 2.1+
        a queue may have up to 25 job servers attached
        the calling workstation must be security-equivalent to a member of the
          queue's Q_SERVERS property
SeeAlso: AH=E3h/SF=70h,AH=E3h/SF=71h,AH=E3h/SF=72h,AH=E3h/SF=73h,AH=E3h/SF=76h
SeeAlso: AX=F217h/SF=6Fh

Format of NetWare "Attach Queue Server to Queue" request buffer:
Offset  Size    Description     (Table 01984)
 00h    WORD    0005h (length of following data)
 02h    BYTE    6Fh (subfunction "Attach Queue Server To Queue")
 03h    DWORD   (big-endian) object ID of queue
SeeAlso: #01983,#01985
--------N-21E3--SF70-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - DETACH QUEUE SERVER FROM QUEUE
        AH = E3h subfn 70h
        DS:SI -> request buffer (see #01985)
        ES:DI -> reply buffer (see #01983)
Return: AL = status (00h,96h,9Ch,D0h,D1h,D2h,FEh,FFh) (see #01961)
Desc:   remove the calling job server from the specified queue's list of
          servers
Notes:  this function is supported by Advanced NetWare 2.1+
        the caller must have previously attached itself to the queue
SeeAlso: AH=E3h/SF=6Fh,AH=E3h/SF=72h,AH=E3h/SF=73h,AH=E3h/SF=76h
SeeAlso: AX=F217h/SF=70h

Format of NetWare "Detach Queue Server From Queue" request buffer:
Offset  Size    Description     (Table 01985)
 00h    WORD    0005h (length of following data)
 02h    BYTE    70h (subfunction "Detach Queue Server From Queue")
 03h    DWORD   (big-endian) object ID of queue
SeeAlso: #01983,#01984
--------N-21E3--SF71-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - SERVICE QUEUE JOB AND OPEN FILE
        AH = E3h subfn 71h
        DS:SI -> request buffer (see #01986)
        ES:DI -> reply buffer (see #01972)
Return: AL = status (00h,96h,9Ch,D0h,D1h,D3h,D5h,D9h,DAh,FEh,FFh)
                (see #01961)
Notes:  this function is supported by Advanced NetWare 2.1+
        the caller must be on a workstation which is security-equivalent to a
          member of the queue's Q_USERS, Q_OPERATORS, or Q_SERVERS properties
SeeAlso: AH=E3h/SF=6Fh,AH=E3h/SF=72h,AH=E3h/SF=73h,AH=E3h/SF=76h
SeeAlso: AX=F217h/SF=71h

Format of NetWare "Service Queue Job and Open File" request buffer:
Offset  Size    Description     (Table 01986)
 00h    WORD    0007h (length of following data)
 02h    BYTE    71h (subfunction "Service Queue Job and Open File")
 03h    DWORD   (big-endian) object ID of queue
 07h    WORD    (big-endian) target job type
                FFFFh any
SeeAlso: #01972,#01987
--------N-21E3--SF72-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - FINISH SERVICING QUEUE JOB AND FILE
        AH = E3h subfn 72h
        DS:SI -> request buffer (see #01987)
        ES:DI -> reply buffer (see #01989)
Return: AL = status (00h,96h,D0h,D1h,D6h) (see #01961)
Desc:   inform the Queue Management System (QMS) that the queue server has
          completed a job
Notes:  this function is supported by Advanced NetWare 2.1+
        the caller must be a job server which has previously obtained a job
          for servicing
SeeAlso: AH=E3h/SF=6Fh,AH=E3h/SF=71h,AH=E3h/SF=73h,AH=E3h/SF=76h
SeeAlso: AX=F217h/SF=72h

Format of NetWare "Finish Servicing Queue Job and File (old)" request buffer:
Offset  Size    Description     (Table 01987)
 00h    WORD    000Bh (length of following data)
 02h    BYTE    72h (subfunction "Finish Servicing Queue Job and File (old)")
 03h    DWORD   (big-endian) object ID of queue
 07h    WORD    (big-endian) job number
 09h    DWORD   (big-endian) charge
SeeAlso: #01989,#01986,#01998
--------N-21E3--SF73-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - ABORT SERVICING QUEUE JOB AND FILE
        AH = E3h subfn 73h
        DS:SI -> request buffer (see #01988)
        ES:DI -> reply buffer (see #01989)
Return: AL = status (00h,96h,D0h,D1h,D6h,D9h) (see #01961)
Desc:   inform the Queue Management System (QMS) that the queue server is
          unable to service a previously-accepted job
Notes:  this function is supported by Advanced NetWare 2.1+
        this is an old version of the call (see AH=E3h/SF=84h)
        only a job server which previously accepted a job for servicing may
          call this function
SeeAlso: AH=E3h/SF=6Fh,AH=E3h/SF=71h,AH=E3h/SF=72h,AH=E3h/SF=76h,AH=E3h/SF=84h
SeeAlso: AX=F217h/SF=73h

Format of NetWare "Abort Servicing Queue Job and File (old)" request buffer:
Offset  Size    Description     (Table 01988)
 00h    WORD    0007h (length of following data)
 02h    BYTE    73h (subfunction "Abort Servicing Queue Job and File (old)")
 03h    DWORD   (big-endian) object ID of queue
 07h    WORD    (big-endian) job number
SeeAlso: #01989,#01987

Format of NetWare reply buffer:
Offset  Size    Description     (Table 01989)
 00h    WORD    (call) 0000h (no results returned)
SeeAlso: #01987,#01988,#01990,#01991
--------N-21E3--SF74-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - CHANGE TO CLIENT RIGHTS (OLD)
        AH = E3h subfn 74h
        DS:SI -> request buffer (see #01990)
        ES:DI -> reply buffer (see #01989)
Return: AL = status (00h,96h,D0h,D1h,D5h,D9h) (see #01961)
Desc:   temporarily assume the login identity of the client submitting the
          job being serviced
Notes:  this function is supported by Advanced NetWare 2.1+
        caller must be a job server which has obtained a job for servicing
SeeAlso: AH=E3h/SF=75h,AX=F217h/SF=74h

Format of NetWare "Change to Client Rights (old)" request buffer:
Offset  Size    Description     (Table 01990)
 00h    WORD    0007h (length of following data)
 02h    BYTE    74h (subfunction "Change To Client Rights (old)")
 03h    DWORD   (big-endian) object ID of queue
 07h    WORD    (big-endian) job number
SeeAlso: #01989,#01991
--------N-21E3--SF75-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - RESTORE QUEUE SERVER RIGHTS
        AH = E3h subfn 75h
        DS:SI -> request buffer (see #01991)
        ES:DI -> reply buffer (see #01989)
Return: AL = status (00h,96h,9Ch,D0h,D1h,D3h,D5h,D9h,DAh,FEh,FFh) (see #01961)
Desc:   restore server's own identity after assuming the login identity of the
          client submitting the job being serviced
Notes:  this function is supported by Advanced NetWare 2.1+
        caller must be a job server which has previously changed its identity
SeeAlso: AH=E3h/SF=74h,AX=F217h/SF=75h

Format of NetWare "Restore Queue Server Rights" request buffer:
Offset  Size    Description     (Table 01991)
 00h    WORD    0001h (length of following data)
 02h    BYTE    75h (subfunction "Change To Client Rights")
SeeAlso: #01989,#01990
--------N-21E3--SF76-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - READ QUEUE SERVER CURRENT STATUS OLD
        AH = E3h subfn 76h
        DS:SI -> request buffer (see #01992)
        ES:DI -> reply buffer (see #01993)
Return: AL = status (00h,96h,9Ch,D1h-D3h,F1h,FCh,FEh,FFh) (see #01961)
Notes:  this function is supported by Advanced NetWare 2.1+
        caller must be on a workstation which is security-equivalent to a
          member of the Q_USERS or Q_OPERATORS properties
SeeAlso: AH=E3h/SF=68h,AH=E3h/SF=6Ch,AH=E3h/SF=6Fh,AH=E3h/SF=77h,AH=E3h/SF=78h
SeeAlso: AX=F217h/SF=76h

Format of NetWare "Read Queue Server Current Status (old)" request buffer:
Offset  Size    Description     (Table 01992)
 00h    WORD    000Ah (length of following data)
 02h    BYTE    76h (subfunction "Read Queue Server Current Status (old)")
 03h    DWORD   (big-endian) object ID of queue
 07h    DWORD   (big-endian) object ID of server
 0Bh    BYTE    server station
SeeAlso: #01993

Format of NetWare "Read Queue Server Current Status (old)" reply buffer:
Offset  Size    Description     (Table 01993)
 00h    WORD    (call) 0040h (size of following results)
 02h 64 BYTEs   server status record (format depends on server)
                first four bytes should contain estimated "price" for an
                  average job
SeeAlso: #01992,#02203
--------N-21E3--SF77-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - SET QUEUE SERVER CURRENT STATUS
        AH = E3h subfn 77h
        DS:SI -> request buffer (see #01994)
        ES:DI -> reply buffer (see #01995)
Return: AL = status (00h,96h,9Ch,D0h,D1h,FEh,FFh) (see #01961)
Notes:  this function is supported by Advanced NetWare 2.1+
        caller must be a job server which has attached itself to the queue
SeeAlso: AH=E3h/SF=68h,AH=E3h/SF=6Ch,AH=E3h/SF=6Fh,AH=E3h/SF=76h,AH=E3h/SF=78h
SeeAlso: AX=F217h/SF=77h

Format of NetWare "Set Queue Server Current Status" request buffer:
Offset  Size    Description     (Table 01994)
 00h    WORD    0045h (length of following data)
 02h    BYTE    77h (subfunction "Set Queue Server Current Status")
 03h    DWORD   (big-endian) object ID of queue
 07h 64 BYTEs   server status record (format depends on server)
                first four bytes should contain estimated "price" for an
                  average job
SeeAlso: #01995

Format of NetWare "Set Queue Server Current Status" reply buffer:
Offset  Size    Description     (Table 01995)
 00h    WORD    (call) 0000h (no results returned)
SeeAlso: #01994
--------N-21E3--SF78-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - GET QUEUE JOB'S FILE SIZE (OLD)
        AH = E3h subfn 78h
        DS:SI -> request buffer (see #01996)
        ES:DI -> reply buffer (see #01997)
Return: AL = status (see also #01961)
            00h successful
Notes:  this function is supported by Advanced NetWare 2.1+
        caller must be on a workstation which is security-equivalent to a
          member of the queue's Q_USERS, Q_OPERATORS, or Q_SERVERS properties
SeeAlso: AH=E3h/SF=68h,AH=E3h/SF=6Ch,AH=E3h/SF=71h,AX=F217h/SF=78h

Format of NetWare "Get Queue Job's File Size (old)" request buffer:
Offset  Size    Description     (Table 01996)
 00h    WORD    0007h (length of following data)
 02h    BYTE    78h (subfunction "Get Queue Job's File Size (old)")
 03h    DWORD   (big-endian) object ID of queue
 07h    WORD    (big-endian) job number
SeeAlso: #01997,#02204 at AX=F217h/SF=78h

Format of NetWare "Get Queue Job's File Size (old)" reply buffer:
Offset  Size    Description     (Table 01997)
 00h    WORD    (call) 000Ah (size of following results)
 02h    DWORD   (big-endian) object ID of queue
 06h    WORD    (big-endian) job number
 08h    DWORD   (big-endian) size of job file in bytes
SeeAlso: #01996,#02204 at AX=F217h/SF=78h
--------N-21E3--SF83-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - FINISH SERVICING QUEUE JOB
        AH = E3h subfn 83h
        DS:SI -> request buffer (see #01998)
        ES:DI -> reply buffer (see #01999)
Return: AL = status (00h,96h,D0h,D1h,D6h,D9h) (see #01961)
Desc:   inform the Queue Management System (QMS) that the queue server has
         completed servicing a previously-accepted job
Notes:  this function is supported by Advanced NetWare 3.1+
        this variant of Abort Servicing Queue Job allows use of the high
          connection byte in the NCP packet header, unlike AH=E3h/SF=73h
SeeAlso: AH=E3h/SF=6Fh,AH=E3h/SF=71h,AH=E3h/SF=72h,AH=E3h/SF=73h,AH=E3h/SF=84h
SeeAlso: AX=F217h/SF=83h

Format of NetWare "Finish Servicing Queue Job" request buffer:
Offset  Size    Description     (Table 01998)
 00h    WORD    0007h (length of following data)
 02h    BYTE    84h (subfunction "Abort Servicing Queue Job")
 03h    DWORD   (big-endian) object ID of queue
 07h    WORD    (big-endian) job number
 09h    DWORD   (big-endian) charge for job
SeeAlso: #01999,#01987

Format of NetWare "Finish Servicing Queue Job" reply buffer:
Offset  Size    Description     (Table 01999)
 00h    WORD    (call) 0000h (no results returned)
SeeAlso: #01998
--------N-21E3--SF84-------------------------
INT 21 - Novell NetWare - QUEUE SERVICES - ABORT SERVICING QUEUE JOB
        AH = E3h subfn 84h
        DS:SI -> request buffer (see #02000)
        ES:DI -> reply buffer (see #02001)
Return: AL = status (00h,96h,D0h,D1h,D6h,D9h) (see #01961)
Desc:   inform the Queue Management System (QMS) that the queue server is
          unable to service a previously-accepted job
Notes:  this function is supported by Advanced NetWare 3.1+
        this variant of Abort Servicing Queue Job allows use of the high
          connection byte in the NCP packet header, unlike AH=E3h/SF=73h
SeeAlso: AH=E3h/SF=6Fh,AH=E3h/SF=71h,AH=E3h/SF=72h,AH=E3h/SF=73h,AH=E3h/SF=76h
SeeAlso: AX=F217h/SF=84h

Format of NetWare "Abort Servicing Queue Job" request buffer:
Offset  Size    Description     (Table 02000)
 00h    WORD    0007h (length of following data)
 02h    BYTE    84h (subfunction "Abort Servicing Queue Job")
 03h    DWORD   (big-endian) object ID of queue
 07h    WORD    (big-endian) job number
SeeAlso: #02001

Format of NetWare "Abort Servicing Queue Job" reply buffer:
Offset  Size    Description     (Table 02001)
 00h    WORD    (call) 0000h (no results returned)
SeeAlso: #02000
--------N-21E3--SF96-------------------------
INT 21 - Novell NetWare - ACCOUNTING SERVICES - GET ACCOUNT STATUS
        AH = E3h subfn 96h
        DS:SI -> request buffer (see #02003)
        ES:DI -> reply buffer (see #02004)
Return: AL = status (00h,C0h,C1h) (see #02002)
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: AH=E3h/SF=97h,AH=E3h/SF=98h,AH=E3h/SF=99h,AX=F217h/SF=96h

(Table 02002)
Values for NetWare function status:
 00h    successful
 C0h    no account privileges
 C1h    no account balance
 C2h    credit limit exceeded
 C3h    too many holds on account
 C6h    no console rights
SeeAlso: #01961

Format of NetWare "Get Account Status" request buffer:
Offset  Size    Description     (Table 02003)
 00h    WORD    length of following data (max 33h)
 02h    BYTE    96h (subfunction "Get Account Status")
 03h    WORD    (big-endian) type of bindery object
 05h    BYTE    length of object name (01h to 2Fh)
 06h  N BYTEs   object name
SeeAlso: #02004,#02224 at AX=F217h/SF=96h

Format of NetWare "Get Account Status" reply buffer:
Offset  Size    Description     (Table 02004)
 00h    WORD    (call) length of following buffer space
 02h    DWORD   (big-endian) account balance
 06h    DWORD   (big-endian) credit limit
                signed number indicating lowest allowable account balance
 0Ah 120 BYTEs  reserved
 82h    DWORD   (big-endian) object ID, server 1
 86h    DWORD   (big-endian) hold amount, server 1
        ...
 F8h    DWORD   (big-endian) object ID, server 16
 FCh    DWORD   (big-endian) hold amount, server 16
Note:   the reply buffer lists the servers which have placed holds on a portion
          of the account balance, and the amount reserved by each
SeeAlso: #02003,#02224 at AX=F217h/SF=96h
--------N-21E3--SF97-------------------------
INT 21 - Novell NetWare - ACCOUNTING SERVICES - SUBMIT ACCOUNT CHARGE
        AH = E3h subfn 97h
        DS:SI -> request buffer (see #02005)
        ES:DI -> reply buffer (see #02007)
Return: AL = status (00h,C0h-C2h) (see #02002)
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: AH=E3h/SF=96h,AH=E3h/SF=98h,AX=F217h/SF=97h

Format of NetWare "Submit Account Charge" request buffer:
Offset  Size    Description     (Table 02005)
 00h    WORD    length of following data (max 13Fh)
 02h    BYTE    97h (subfunction "Submit Account Charge")
 03h    WORD    (big-endian) service type
 05h    DWORD   (big-endian) amount to be charged to account
 09h    DWORD   (big-endian) amount of prior hold to be cancelled
 0Dh    WORD    (big-endian) type of bindery object
 0Fh    WORD    (big-endian) type of comment
                8000h-FFFFh reserved for experimental use
 11h    BYTE    length of object's name
 12h  N BYTEs   object name
        BYTE    length of comment
      N BYTEs   comment
SeeAlso: #02007
--------N-21E3--SF98-------------------------
INT 21 - Novell NetWare - ACCOUNTING SERVICES - SUBMIT ACCOUNT HOLD
        AH = E3h subfn 98h
        DS:SI -> request buffer (see #02006)
        ES:DI -> reply buffer (see #02007)
Return: AL = status (00h,C0h-C3h) (see #02002)
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: AH=E3h/SF=96h,AH=E3h/SF=97h,AX=F217h/SF=98h

Format of NetWare "Submit Account Hold" request buffer:
Offset  Size    Description     (Table 02006)
 00h    WORD    length of following data (max 37h)
 02h    BYTE    98h (subfunction "Submit Account Hold")
 03h    DWORD   (big-endian) amount of account balance to reserve
 07h    WORD    (big-endian) type of bindery object
 09h    BYTE    length of object's name
 0Ah  N BYTEs   object name
SeeAlso: #02007

Format of NetWare reply buffer:
Offset  Size    Description     (Table 02007)
 00h    WORD    0000h (no data returned)
SeeAlso: #02005,#02006,#02008,#02009
--------N-21E3--SF99-------------------------
INT 21 - Novell NetWare - ACCOUNTING SERVICES - SUBMIT ACCOUNT NOTE
        AH = E3h subfn 99h
        DS:SI -> request buffer (see #02008)
        ES:DI -> reply buffer (see #02007)
Return: AL = status (00h,C0h) (see #02002)
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: AH=E3h/SF=96h,AX=F217h/SF=99h

Format of NetWare "Submit Account Note" request buffer:
Offset  Size    Description     (Table 02008)
 00h    WORD    length of following data (max 137h)
 02h    BYTE    99h (subfunction "Submit Account Note")
 03h    WORD    (big-endian) type of service
 05h    WORD    (big-endian) type of bindery object
 07h    WORD    (big-endian) type of comment
                8000h-FFFFh reserved for experimental use
 09h    BYTE    length of object's name
 0Ah  N BYTEs   object name
        BYTE    length of comment
      N BYTEs   comment
SeeAlso: #02007
--------N-21E3--SFC8-------------------------
INT 21 - Novell NetWare - FILE SERVER - CHECK CONSOLE PRIVILEGES
        AH = E3h subfn C8h
        DS:SI -> request buffer (see #02009)
        ES:DI -> reply buffer (see #02007)
Return: AL = status (00h,C6h) (see #02002)
Desc:   determine whether the caller is a console operator
Notes:  this function is supported by Advanced NetWare 2.1+
        NetWare determines console privileges by checking the file server's
          OPERATOR property for the caller's object ID
SeeAlso: AH=E3h/SF=C9h,AH=E3h/SF=D1h,AX=F217h/SF=C8h

Format of NetWare "Check Console Privileges" request buffer:
Offset  Size    Description     (Table 02009)
 00h    WORD    0001h (length of following data)
 02h    BYTE    C8h (subfunction "Check Console Privileges")
SeeAlso: #02007
--------N-21E3--SFC9-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET FILE SERVER DESCRIPTION STRINGS
        AH = E3h subfn C9h
        DS:SI -> request buffer (see #02010)
        ES:DI -> reply buffer (see #02011)
Return: AL = status
            00h successful
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must be attached to the file server
SeeAlso: AH=E3h/SF=11h,AH=E3h/SF=CDh,AH=E3h/SF=E8h,AX=F217h/SF=C9h

Format of NetWare "Get File Server Description Strings" request buffer:
Offset  Size    Description     (Table 02010)
 00h    WORD    0001h (length of following data)
 02h    BYTE    C9h (subfunction "Get File Server Description Strings")
SeeAlso: #02011,#02225 at AX=F217h/SF=C9h

Format of NetWare "Get File Server Description Strings" reply buffer:
Offset  Size    Description     (Table 02011)
 00h    WORD    (call) 0200h (size of following results buffer)
 02h    var     ASCIZ name of company distributing this copy of NetWare
        var     ASCIZ version and revision
      9 BYTEs   ASCIZ revision date (mm/dd/yy)
        var     ASCIZ copyright notice
SeeAlso: #02010,#02225 at AX=F217h/SF=C9h
--------N-21E3--SFCA-------------------------
INT 21 - Novell NetWare - FILE SERVER - SET FILE SERVER DATE AND TIME
        AH = E3h subfn CAh
        DS:SI -> request buffer (see #02012)
        ES:DI -> reply buffer (see #02014)
Return: AL = status (00h,C6h) (see #02002)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=2Bh"DATE",AH=2Dh"TIME",AH=E3h/SF=C8h,AH=E7h"Novell",AX=F217h/SF=CAh
SeeAlso: AX=F214h

Format of NetWare "Set File Server Date and Time" request buffer:
Offset  Size    Description     (Table 02012)
 00h    WORD    0007h (length of following data)
 02h    BYTE    CAh (subfunction "Set File Server Date And Time")
 03h    BYTE    year (00-79 = 2000-2079, 80-99 = 1980-1999)
 04h    BYTE    month (1-12)
 05h    BYTE    day (1-31)
 06h    BYTE    hour (0-23)
 07h    BYTE    minute
 08h    BYTE    second
SeeAlso: #02014,#02106 at AX=F214h
--------N-21E3--SFCB-------------------------
INT 21 - Novell NetWare - FILE SERVER - DISABLE FILE SERVER LOGIN
        AH = E3h subfn CBh
        DS:SI -> request buffer (see #02013)
        ES:DI -> reply buffer (see #02014)
Return: AL = status (00h,C6h) (see #02002)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=CCh,AH=E3h/SF=D3h,AX=F217h/SF=CBh

Format of NetWare "Disable File Server Login" request buffer:
Offset  Size    Description     (Table 02013)
 00h    WORD    0001h (length of following data)
 02h    BYTE    CBh (subfunction "Disable File Server Login")
SeeAlso: #02014,#02015

Format of NetWare reply buffer:
Offset  Size    Description     (Table 02014)
 00h    WORD    (call) 0000h (no results returned)
SeeAlso: #02012,#02013,#02015
--------N-21E3--SFCC-------------------------
INT 21 - Novell NetWare - FILE SERVER - ENABLE FILE SERVER LOGIN
        AH = E3h subfn CCh
        DS:SI -> request buffer (see #02015)
        ES:DI -> reply buffer (see #02014)
Return: AL = status (00h,C6h) (see #02002)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=CBh,AX=F217h/SF=CCh

Format of NetWare "Enable File Server Login" request buffer:
Offset  Size    Description     (Table 02015)
 00h    WORD    0001h (length of following data)
 02h    BYTE    CCh (subfunction "Enable File Server Login")
SeeAlso: #02014
--------N-21E3--SFCD-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET FILE SERVER LOGIN STATUS
        AH = E3h subfn CDh
        DS:SI -> request buffer (see #02016)
        ES:DI -> reply buffer (see #02017)
Return: AL = status (00h,C6h) (see #02002)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=CBh,AH=E3h/SF=CCh

Format of NetWare "Get File Server Login Status" request buffer:
Offset  Size    Description     (Table 02016)
 00h    WORD    0001h (length of following data)
 02h    BYTE    CDh (subfunction "Get File Server Login Status")
SeeAlso: #02017,#02226 at AX=F217h/SF=CDh

Format of NetWare "Get File Server Login Status" reply buffer:
Offset  Size    Description     (Table 02017)
 00h    WORD    (call) 0001h (size of following results buffer)
 02h    BYTE    login state (00h disabled, 01h enabled)
SeeAlso: #02016,#02226 at AX=F217h/SF=CDh
--------N-21E3--SFCE-------------------------
INT 21 - Novell NetWare - FILE SERVICES - PURGE ALL ERASED FILES
        AH = E3h subfn CEh
        DS:SI -> request buffer (see #02018)
        ES:DI -> reply buffer (see #02020)
Return: AL = status (00h,C6h) (see #02002)
Desc:   all files marked for deletion on the file server are purged, regardless
          of which workstation actually erased them
Notes:  this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
        the calling workstation must have console operator privileges
SeeAlso: AH=13h,AH=E2h/SF=10h,AH=E3h/SF=C8h,AX=F217h/SF=CEh,AX=F244h

Format of NetWare "Purge All Erased Files" request buffer:
Offset  Size    Description     (Table 02018)
 00h    WORD    0001h (length of following data)
 02h    BYTE    CEh (subfunction "Purge All Erased Files")
SeeAlso: #02020
--------N-21E3--SFCF-------------------------
INT 21 - Novell NetWare - FILE SERVER - DISABLE TRANSACTION TRACKING
        AH = E3h subfn CFh
        DS:SI -> request buffer (see #02019)
        ES:DI -> reply buffer (see #02020)
Return: AL = status (00h,C6h) (see #02002)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=D0h

Format of NetWare "Disable Transaction Tracking" request buffer:
Offset  Size    Description     (Table 02019)
 00h    WORD    0001h (length of following data)
 02h    BYTE    CFh (subfunction "Disable Transaction Tracking")
SeeAlso: #02020,#02021

Format of NetWare reply buffer:
Offset  Size    Description     (Table 02020)
 00h    WORD    (call) 0000h (no results returned)
SeeAlso: #02018,#02019,#02021
--------N-21E3--SFD0-------------------------
INT 21 - Novell NetWare - FILE SERVER - ENABLE TRANSACTION TRACKING
        AH = E3h subfn D0h
        DS:SI -> request buffer (see #02021)
        ES:DI -> reply buffer (see #02020)
Return: AL = status (00h,C6h) (see #02025)
Desc:   restart transaction tracking after being stopped either explicitly by
          AH=E3h/SF=CFh or automatically due to a full transaction volume
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=CFh,AX=F217h/SF=D0h

Format of NetWare "Enable Transaction Tracking" request buffer:
Offset  Size    Description     (Table 02021)
 00h    WORD    0001h (length of following data)
 02h    BYTE    D0h (subfunction "Enable Transaction Tracking")
SeeAlso: #02020,#02019
--------N-21E3--SFD1-------------------------
INT 21 - Novell NetWare - FILE SERVER - SEND CONSOLE BROADCAST
        AH = E3h subfn D1h
        DS:SI -> request buffer (see #02022)
        ES:DI -> reply buffer (see #02024)
Return: AL = status (00h,C6h) (see #02025)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
        the broadcast message will not be received by workstations which have
          disabled broadcasts with AH=E1h/SF=02h
SeeAlso: AH=E1h/SF=02h,AH=E1h/SF=09h,AH=E3h/SF=C8h,AH=E3h/SF=D3h
SeeAlso: AX=F217h/SF=D1h

Format of NetWare "Send Console Broadcast" request buffer:
Offset  Size    Description     (Table 02022)
 00h    WORD    length of following data (max A2h)
 02h    BYTE    D1h (subfunction "Send Console Broadcast")
 03h    BYTE    number of connections to receive message
                00h = all, else specific list below
 04h  N BYTEs   connection list
        BYTE    length of message (max 3Ch)
      N BYTEs   message
SeeAlso: #02024
--------N-21E3--SFD2-------------------------
INT 21 - Novell NetWare - FILE SERVER - CLEAR CONNECTION NUMBER
        AH = E3h subfn D2h
        DS:SI -> request buffer (see #02023)
        ES:DI -> reply buffer (see #02024)
Return: AL = status (00h,C6h) (see #02025)
Desc:   close the open files and release all file locks for a connection,
          abort transactions if a TTS file server, and detach from the file
          server
Notes:  this function is supported by Advanced NetWare 2.1+
        the caller must have SUPERVISOR privileges
SeeAlso: AH=E3h/SF=C9h,AH=E3h/SF=D1h,AX=F217h/SF=D2h,AX=F217h/SF=FEh

Format of NetWare "Clear Connection Number" request buffer:
Offset  Size    Description     (Table 02023)
 00h    WORD    0002h (length of following data)
 02h    BYTE    D2h (subfunction "Clear Connection Number")
 03h    BYTE    connection number
SeeAlso: #02024,#02277

Format of NetWare reply buffer:
Offset  Size    Description     (Table 02024)
 00h    WORD    (call) 0000h (no results returned)
SeeAlso: #02022,#02023,#02026
--------N-21E3--SFD3-------------------------
INT 21 - Novell NetWare - FILE SERVER - DOWN FILE SERVER
        AH = E3h subfn D3h
        DS:SI -> request buffer (see #02026)
        ES:DI -> reply buffer (see #02024)
Return: AL = status (00h,C6h,FFh) (see #02025)
Desc:   take down the file server
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have SUPERVISOR privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=CBh,AH=E3h/SF=CFh,AH=E3h/SF=D1h

(Table 02025)
Values for NetWare function status:
 00h    successful
 C6h    no console rights
 FFh    files open
SeeAlso: #02002,#02053

Format of NetWare "Down File Server" request buffer:
Offset  Size    Description     (Table 02026)
 00h    WORD    0002h (length of following data)
 02h    BYTE    D3h (subfunction "Down File Server")
 03h    BYTE    flag: force down even if files open if nonzero
SeeAlso: #02024
--------N-21E3--SFD4-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET FILE SYSTEM STATISTICS
        AH = E3h subfn D4h
        DS:SI -> request buffer (see #02027)
        ES:DI -> reply buffer (see #02028)
Return: AL = status (00h,C6h) (see #02025)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=0Eh,AH=E3h/SF=C8h,AH=E3h/SF=D9h,AH=E3h/SF=E7h,AH=E3h/SF=E8h
SeeAlso: AX=F217h/SF=D4h

Format of NetWare "Get File System Statistics" request buffer:
Offset  Size    Description     (Table 02027)
 00h    WORD    0001h (length of following data)
 02h    BYTE    D4h (subfunction "Get File System Statistics")
SeeAlso: #02028,#02227 at AX=F217h/SF=D4h

Format of NetWare "Get File System Statistics" reply buffer:
Offset  Size    Description     (Table 02028)
 00h    WORD    (call) 0028h (size of following results buffer)
 02h    DWORD   clock ticks since system started
 06h    WORD    maximum open files set by configuration
 08h    WORD    maximum files open concurrently
 0Ah    WORD    current number of open files
 0Ch    DWORD   total files opened
 10h    DWORD   total file read requests
 14h    DWORD   total file write requests
 18h    WORD    current changed FATs
 1Ah    WORD    total changed FATs
 1Ch    WORD    number of FAT write errors
 1Eh    WORD    number of fatal FAT write errors
 20h    WORD    number of FAT scan errors
 22h    WORD    maximum concurrently-indexed files
 24h    WORD    current number of indexed files
 26h    WORD    number of attached indexed files
 28h    WORD    number of indexed files available
Note:   all fields except the first are big-endian
SeeAlso: #02027,#02227 at AX=F217h/SF=D4h
--------N-21E3--SFD5-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET TRANSACTION TRACKING STATISTICS
        AH = E3h subfn D5h
        DS:SI -> request buffer (see #02029)
        ES:DI -> reply buffer (see #02030)
Return: AL = status (00h,C6h) (see #02025)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=CFh,AH=E3h/SF=D0h,AH=E3h/SF=E8h
SeeAlso: AX=F217h/SF=D5h

Format of NetWare "Get Transaction Tracking Statistics" request buffer:
Offset  Size    Description     (Table 02029)
 00h    WORD    0001h (length of following data)
 02h    BYTE    D5h (subfunction "TTS Get Statistics")
SeeAlso: #02030,#02228 at AX=F217h/SF=D5h

Format of NetWare "Get Transaction Tracking Statistics" reply buffer:
Offset  Size    Description     (Table 02030)
 00h    WORD    (call) length of following results buffer (max 1BCh)
 02h    DWORD   (big-endian) clock ticks since system started
 06h    BYTE    transaction tracking supported if nonzero
                (all following fields are invalid if zero)
 07h    BYTE    transaction tracking enabled
 08h    WORD    (big-endian) transaction volume number
 0Ah    WORD    (big-endian) maximum simultaneous transactions configured
 0Ch    WORD    (big-endian) maximum simultaneous transactions since startup
 0Eh    WORD    (big-endian) current transactions in progress
 10h    DWORD   (big-endian) total transactions performed
 14h    DWORD   (big-endian) total write transactions
 18h    DWORD   (big-endian) total transactions backed out
 1Ch    WORD    (big-endian) number of unfilled backout requests
 1Eh    WORD    (big-endian) disk blocks used for transaction tracking
 20h    DWORD   (big-endian) blocks allocated for tracked-file FATs
 24h    DWORD   (big-endian) number of file size changes during a transaction
 28h    DWORD   (big-endian) number of file truncations during a transaction
 2Ch    BYTE    number of records following
 2Dh    Active Transaction Records [array]
        Offset  Size    Description
         00h    BYTE    logical connection number
         01h    BYTE    task number
SeeAlso: #02029,#02228 at AX=F217h/SF=D5h
--------N-21E3--SFD6-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET DISK CACHE STATISTICS
        AH = E3h subfn D6h
        DS:SI -> request buffer (see #02031)
        ES:DI -> reply buffer (see #02032)
Return: AL = status (00h,C6h) (see #02025)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=D5h,AH=E3h/SF=D8h,AH=E3h/SF=D9h,AH=E3h/SF=E6h
SeeAlso: AX=F217h/SF=D6h

Format of NetWare "Get Disk Cache Statistics" request buffer:
Offset  Size    Description     (Table 02031)
 00h    WORD    0001h (length of following data)
 02h    BYTE    D6h (subfunction "Get Disk Cache Statistics")
SeeAlso: #02032,#02229 at AX=F217h/SF=D6h

Format of NetWare "Get Disk Cache Statistics" reply buffer:
Offset  Size    Description     (Table 02032)
 00h    WORD    (call) 004Eh (length of following results buffer)
 02h    DWORD   clock ticks since system started
 06h    WORD    number of cache buffers
 08h    WORD    size of cache buffer in bytes
 0Ah    WORD    number of dirty cache buffers
 0Ch    DWORD   number of cache read requests
 10h    DWORD   number of cache write requests
 14h    DWORD   number of cache hits
 18h    DWORD   number of cache misses
 1Ch    DWORD   number of physical read requests
 20h    DWORD   number of physical write requests
 24h    WORD    number of physical read errors
 26h    WORD    number of physical write errors
 28h    DWORD   cache get requests
 2Ch    DWORD   cache full write requests
 30h    DWORD   cache partial write requests
 34h    DWORD   background dirty writes
 38h    DWORD   background aged writes
 3Ch    DWORD   total cache writes
 40h    DWORD   number of cache allocations
 44h    WORD    thrashing count
 46h    WORD    number of times LRU block was dirty
 48h    WORD    number of reads on cache blocks not yet filled by writes
 4Ah    WORD    number of times a fragmented write occurred
 4Ch    WORD    number of cache hits on unavailable block
 4Eh    WORD    number of times a cache block was scrapped
Note:   all fields except the first are big-endian
SeeAlso: #02031,#02229 at AX=F217h/SF=D6h
--------N-21E3--SFD7-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET DRIVE MAPPING TABLE
        AH = E3h subfn D7h
        DS:SI -> request buffer (see #02033)
        ES:DI -> reply buffer (see #02034)
Return: AL = status (00h,C6h) (see #02025)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=D6h,AH=E3h/SF=D9h,AH=E3h/SF=E6h,AH=E3h/SF=E9h
SeeAlso: AX=F217h/SF=D7h

Format of NetWare "Get Drive Mapping Table" request buffer:
Offset  Size    Description     (Table 02033)
 00h    WORD    0001h (length of following data)
 02h    BYTE    D7h (subfunction "Get Drive Mapping Table")
SeeAlso: #02034,#02230 at AX=F217h/SF=D7h

Format of NetWare "Get Drive Mapping Table" reply buffer:
Offset  Size    Description     (Table 02034)
 00h    WORD    (call) 00ECh (length of following results buffer)
 02h    DWORD   (big-endian) clock tick elapsed since system started
 06h    BYTE    fault tolerance (SFT) level
 07h    BYTE    number of logical drives attached to server
 08h    BYTE    number of physical drives attached to server
 09h  5 BYTEs   disk channel types (00h none, 01h XT, 02h AT, 03h SCSI,
                  04h disk coprocessor drive, 32h-FFh value-added drive types)
 0Eh    WORD    (big-endian) number of outstanding controller commands
 10h 32 BYTEs   drive mapping table (FFh = no such drive)
 30h 32 BYTEs   drive mirror table (secondary physical drive, FFh = none)
 50h 32 BYTEs   dead mirror table (last drive mapped to, FFh if never mirrored)
 70h    BYTE    physical drive being remirrored (FFh = none)
 71h    BYTE    reserved
 72h    DWORD   (big-endian) remirrored block
 76h 60 BYTEs   SFT error table (internal error counters)
SeeAlso: #02033,#02230 at AX=F217h/SF=D7h
--------N-21E3--SFD8-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET PHYSICAL DISK STATISTICS
        AH = E3h subfn D8h
        DS:SI -> request buffer (see #02035)
        ES:DI -> reply buffer (see #02036)
Return: AL = status (00h,C6h) (see #02025)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=D9h,AH=E3h/SF=E9h,AX=F217h/SF=D8h

Format of NetWare "Get Physical Disk Statistics" request buffer:
Offset  Size    Description     (Table 02035)
 00h    WORD    0002h (length of following data)
 02h    BYTE    D8h (subfunction "Get Physical Disk Statistics")
 03h    BYTE    physical disk number
SeeAlso: #02036,#02231 at AX=F217h/SF=D8h

Format of NetWare "Get Physical Disk Statistics" reply buffer:
Offset  Size    Description     (Table 02036)
 00h    WORD    (call) 005Dh (size of following results record)
 02h    DWORD   (big-endian) clock ticks since system started
 06h    BYTE    physical disk channel
 07h    BYTE    flag: drive removable if nonzero
 08h    BYTE    physical drive type
 09h    BYTE    drive number within controller
 0Ah    BYTE    controller number
 0Bh    BYTE    controller type
 0Ch    DWORD   (big-endian) size of drive in 4K disk blocks
 10h    WORD    (big-endian) number of cylinders on drive
 12h    BYTE    number of heads
 13h    BYTE    number of sectors per track
 14h 64 BYTEs   ASCIZ drive make and model
 54h    WORD    (big-endian) number of I/O errors
 56h    DWORD   (big-endian) start of Hot Fix table
 5Ah    WORD    (big-endian) size of Hot Fix table
 5Ch    WORD    (big-endian) number of Hot Fix blocks available
 5Eh    BYTE    flag: Hot Fix disabled if nonzero
SeeAlso: #02035,#02231 at AX=F217h/SF=D8h
--------N-21E3--SFD9-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET DISK CHANNEL STATISTICS
        AH = E3h subfn D9h
        DS:SI -> request buffer (see #02037)
        ES:DI -> reply buffer (see #02038)
Return: AL = status (00h,C6h) (see #02025)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=D8h,AH=E3h/SF=E6h,AH=E3h/SF=E9h
SeeAlso: AX=F217h/SF=D9h

Format of NetWare "Get Disk Channel Statistics" request buffer:
Offset  Size    Description     (Table 02037)
 00h    WORD    0002h (length of following data)
 02h    BYTE    D9h (subfunction "Get Disk Channel Statistics")
 03h    BYTE    channel number
SeeAlso: #02038,#02232 at AX=F217h/SF=D9h

Format of NetWare "Get Disk Channel Statistics" reply buffer:
Offset  Size    Description     (Table 02038)
 00h    WORD    (call) 00A8h (size of following results record)
 02h    DWORD   (big-endian) clock ticks since system started
 06h    WORD    (big-endian) channel run state (see #02039)
 08h    WORD    (big-endian) channel synchronization state (see #02040)
 0Ah    BYTE    driver type
 0Bh    BYTE    major version of driver
 0Ch    BYTE    minor version of driver
 0Dh 65 BYTEs   ASCIZ driver description
 4Eh    WORD    (big-endian) first I/O address used
 50h    WORD    (big-endian) length of first I/O address
 52h    WORD    (big-endian) second I/O address used
 54h    WORD    (big-endian) length of second I/O address
 56h  3 BYTEs   first shared memory address
 59h  2 BYTEs   length of first shared memory address
 5Bh  3 BYTEs   second shared memory address
 5Eh  2 BYTEs   length of second shared memory address
 60h    BYTE    first interrupt number in-use flag
 61h    BYTE    first interrupt number used
 62h    BYTE    second interrupt number in-use flag
 63h    BYTE    second interrupt number used
 64h    BYTE    first DMA channel in-use flag
 65h    BYTE    first DMA channel used
 66h    BYTE    second DMA channel in-use flag
 67h    BYTE    second DMA channel used
 68h    BYTE    flags
 69h    BYTE    reserved
 6Ah 80 BYTEs   ASCIZ configuration description
SeeAlso: #02037,#02232 at AX=F217h/SF=D9h

(Table 02039)
Values for channel run state:
 0000h  running
 0001h  being stopped
 0002h  stopped
 0003h  nonfunctional
SeeAlso: #02038,#02040

(Table 02040)
Values for channel synchronization state:
 0000h  not in use
 0002h  used by NetWare, no other requests
 0004h  used by NetWare, other requests
 0006h  in use, not needed by NetWare
 0008h  in use, needed by NetWare
 000Ah  channel released, NetWare should use it
SeeAlso: #02038,#02039
--------N-21E3--SFDA-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET CONNECTION'S TASK INFORMATION
        AH = E3h subfn DAh
        DS:SI -> request buffer (see #02041)
        ES:DI -> reply buffer (see #02042)
Return: AL = status (00h,C6h) (see #02053)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=DBh,AH=E3h/SF=DFh,AH=E3h/SF=E1h,AH=E3h/SF=E5h
SeeAlso: AX=F217h/SF=DAh

Format of NetWare "Get Connection's Task Information" request buffer:
Offset  Size    Description     (Table 02041)
 00h    WORD    0003h (length of following data)
 02h    BYTE    DAh (subfunction "Get Connection's Task Information")
 03h    WORD    (big-endian) logical connection number
SeeAlso: #02042,#02233 at AX=F217h/SF=DAh

Format of NetWare "Get Connection's Task Information" reply buffer:
Offset  Size    Description     (Table 02042)
 00h    WORD    (call) size of following results record (max 1FEh)
 02h    BYTE    lock status of connection (see #02043)
 03h    var     Lock Status Information (see #02044)
 N      BYTE    number of records following
 N+1    Active Task Information Records [array]
        Offset  Size    Description
         00h    BYTE    task number (01h-FFh)
         01h    BYTE    task state
                        01h in TTS explicit transaction
                        02h in TTS implicit transaction
                        04h shared fileset lock active
SeeAlso: #02041,#02233 at AX=F217h/SF=DAh

(Table 02043)
Values for lock status of connection:
 00h    no locks
 01h    waiting on physical record lock
 02h    waiting on file lock
 03h    waiting on logical record lock
 04h    waiting on semaphore
SeeAlso: #02042,#02044

Format of Lock Status Information:
Offset  Size    Description     (Table 02044)
---lock status 00h---
 no fields
---lock status 01h---
 00h    BYTE    number of waiting task
 01h    DWORD   start address
 05h    DWORD   end address
 09h    BYTE    volume number
 0Ah    WORD    directory entry number
 0Ch 14 BYTEs   ASCIZ filename
---lock status 02h---
 00h    BYTE    number of waiting task
 01h    BYTE    volume number
 02h    WORD    directory entry number
 04h 14 BYTEs   ASCIZ filename
---lock status 03h---
 00h    BYTE    number of waiting task
 01h    BYTE    length of record name
 02h  N BYTEs   ASCIZ record name
---lock status 04h---
 00h    BYTE    number of waiting task
 01h    BYTE    length of semaphore's name
 02h  N BYTEs   ASCIZ semaphore name
SeeAlso: #02042,#02043
--------N-21E3--SFDB-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET CONNECTION'S OPEN FILES (OLD)
        AH = E3h subfn DBh
        DS:SI -> request buffer (see #02045)
        ES:DI -> reply buffer (see #02046)
Return: AL = status (00h,C6h) (see #02053)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E2h/SF=1Ah,AH=E3h/SF=C8h,AH=E3h/SF=DAh,AH=E3h/SF=DCh,AH=E3h/SF=DFh
SeeAlso: AH=E3h/SF=E1h,AX=F217h/SF=DBh

Format of NetWare "Get Connection's Open Files (old)" request buffer:
Offset  Size    Description     (Table 02045)
 00h    WORD    0005h (length of following data)
 02h    BYTE    DBh (subfunction "Get Connection's Open Files")
 03h    WORD    (big-endian) logical connection number
 05h    WORD    (big-endian) last record seen (0000h on first call)
SeeAlso: #02046,#02234 at AX=F217h/SF=DBh

Format of NetWare "Get Connection's Open Files (old)" reply buffer:
Offset  Size    Description     (Table 02046)
 00h    WORD    (call) size of following results record (max 1FEh)
 02h    WORD    next request record (place in "last record" field on next call)
                0000h if no more records
 04h    BYTE    number of records following
 05h    var     array of File Information Records (see #02047)
SeeAlso: #02045,#02234 at AX=F217h/SF=DBh

Format of NetWare File Information Record:
Offset  Size    Description     (Table 02047)
 00h    BYTE    task number
 01h    BYTE    lock flags (see #02048)
 02h    BYTE    access flags (see #02049)
 03h    BYTE    lock type
                00h no lock
                FEh file lock
                FFh locked by Begin Share File Set
 04h    BYTE    volume number (00h-1Fh)
 05h    WORD    (big-endian) directory entry number
 07h 14 BYTEs   ASCIZ filename
SeeAlso: #02046

Bitfields for lock flags:
Bit(s)  Description     (Table 02048)
 0      file is locked
 1      file opened Shareable
 2      logged
 3      file opened Normal
 6      TTS holding lock
 7      Transaction Flag set on file
SeeAlso: #02047,#02049

Bitfields for access flags:
Bit(s)  Description     (Table 02049)
 0      file open for reading by calling station
 1      file open for writing by calling station
 2      deny reads by other stations
 3      deny writes by other stations
 4      file detached
 5      TTS Holding Detach
 6      TTS Holding Open
SeeAlso: #02047,#02048
--------N-21E3--SFDC-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET CONNECTIONS USING A FILE
        AH = E3h subfn DCh
        DS:SI -> request buffer (see #02050)
        ES:DI -> reply buffer (see #02051)
Return: AL = status (00h,C6h) (see #02053)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=DAh,AH=E3h/SF=DBh,AH=E3h/SF=DFh,AH=E3h/SF=E1h
SeeAlso: AX=F217h/SF=DCh

Format of NetWare "Get Connections Using a File" request buffer:
Offset  Size    Description     (Table 02050)
 00h    WORD    length of following data (max 104h)
 02h    BYTE    DCh (subfunction "Get Connections Using a File")
 03h    WORD    (big-endian) last record (0000h on first call)
 05h    BYTE    directory handle
 06h    BYTE    length of file path
 07h  N BYTEs   ASCIZ file path
SeeAlso: #02051,#02235 at AX=F217h/SF=DCh

Format of NetWare "Get Connections Using a File" reply buffer:
Offset  Size    Description     (Table 02051)
 00h    WORD    (call) size of following results record (max 1FEh)
 02h    WORD    (big-endian) count of tasks which have opened or logged file
 04h    WORD    (big-endian) count of tasks which have opened file
 06h    WORD    (big-endian) count of opens for reading
 08h    WORD    (big-endian) count of opens for writing
 0Ah    WORD    (big-endian) deny read count
 0Ch    WORD    (big-endian) deny write count
 0Eh    WORD    next request record (place in "last record" field on next call)
                0000h if no more records
 10h    BYTE    locked flag
                00h not locked exclusively
                else locked exclusively
 11h    BYTE    number of records following
 12h    var     array of File Usage Information Records (see #02052)
SeeAlso: #02050,#02235 at AX=F217h/SF=DCh

Format of NetWare File Usage Information Record:
Offset  Size    Description     (Table 02052)
 00h    WORD    (big-endian) logical connection number
 02h    BYTE    task number
 03h    BYTE    lock flags (see #02048)
 04h    BYTE    access flags (see #02049)
 05h    BYTE    lock type
                00h no lock
                FEh file lock
                FFh locked by Begin Share File Set
--------N-21E3--SFDD-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET PHYSICAL RECORD LOCKS BY CONN&FILE
        AH = E3h subfn DDh
        DS:SI -> request buffer (see #02054)
        ES:DI -> reply buffer (see #02055)
Return: AL = status (00h,C6h,FFh) (see #02053)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=DEh,AH=E3h/SF=DFh,AX=F217h/SF=DDh

(Table 02053)
Values for NetWare function status:
 00h    successful
 C6h    no console rights
 FFh    file not open
SeeAlso: #02025,#02094

Format of NetWare "Get Phys Record Locks by Conn and File" request buffer:
Offset  Size    Description     (Table 02054)
 00h    WORD    0016h (length of following data)
 02h    BYTE    DDh (subfunction "Get Physical Record Locks by Connection and
                  File")
 03h    WORD    (big-endian) logical connection number
 05h    WORD    (big-endian) last record seen (0000h on first call)
 07h    BYTE    volume number (00h-1Fh)
 08h    WORD    (big-endian) directory handle
 0Ah 14 BYTEs   ASCIZ filename
SeeAlso: #02055,#02236 at AX=F217h/SF=DDh

Format of NetWare "Get Phys Record Locks by Conn and File" reply buffer:
Offset  Size    Description     (Table 02055)
 00h    WORD    (call) size of following results record (max 1FEh)
 02h    WORD    next request record (place in "last record" on next call)
                0000h if no more records
 04h    BYTE    number of physical record locks
 05h    BYTE    number of records following
 06h    var     array of Physical Record Lock Info records (see #02056)
SeeAlso: #02054,#02236 at AX=F217h/SF=DDh

Format of NetWare Physical Record Lock Info:
Offset  Size    Description     (Table 02056)
 00h    BYTE    task number
 01h    BYTE    lock status (see #02057)
 02h    DWORD   (big-endian) starting offset of record in file
 06h    DWORD   (big-endian) ending offset of record in file
SeeAlso: #02055

Bitfields for lock status:
Bit(s)  Description     (Table 02057)
 0      exclusive lock
 1      shareable lock
 2      logged
 6      lock held by TTS
SeeAlso: #02056
--------N-21E3--SFDE-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET PHYSICAL RECORD LOCKS BY FILE
        AH = E3h subfn DEh
        DS:SI -> request buffer (see #02058)
        ES:DI -> reply buffer (see #02059)
Return: AL = status (00h,C6h,FFh) (see #02053)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=DDh,AH=E3h/SF=DFh,AX=F217h/SF=DEh

Format of NetWare "Get Physical Record Locks by File" request buffer:
Offset  Size    Description     (Table 02058)
 00h    WORD    length of following data (max 104h)
 02h    BYTE    DEh (subfunction "Get Physical Record Locks by File")
 03h    WORD    (big-endian) last record seen (0000h on first call)
 05h    BYTE    directory handle
 06h    BYTE    length of filename
 07h  N BYTEs   ASCIZ filename
SeeAlso: #02059,#02237 at AX=F217h/SF=DEh

Format of NetWare "Get Physical Record Locks by File" reply buffer:
Offset  Size    Description     (Table 02059)
 00h    WORD    (call) size of following results record (max 1FEh)
 02h    WORD    next request record (place in "last record" on next call)
                0000h if no more records
 04h    BYTE    number of physical record locks
 05h    BYTE    number of records following
 06h    var     array of Physical Record Lock Info records (see #02060)
SeeAlso: #02058,#02237 at AX=F217h/SF=DEh

Format of NetWare Physical Record Lock Info:
Offset  Size    Description     (Table 02060)
 00h    WORD    (big-endian) number of tasks logging record
 02h    WORD    (big-endian) number of tasks with shareable lock
 04h    DWORD   (big-endian) starting offset of record in file
 08h    DWORD   (big-endian) ending offset of record in file
 0Ch    WORD    (big-endian) logical connection number
 0Eh    BYTE    task number
 0Fh    BYTE    lock type
                00h none
                FEh file lock
                FFh Begin Share File Set lock
SeeAlso: #02059
--------N-21E3--SFDF-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET LOGICAL RECORDS BY CONNECTION
        AH = E3h subfn DFh
        DS:SI -> request buffer (see #02061)
        ES:DI -> reply buffer (see #02062)
Return: AL = status (00h,C6h) (see #02053)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=DDh,AH=E3h/SF=E0h,AH=E3h/SF=E2h
SeeAlso: AX=F217h/SF=DFh

Format of NetWare "Get Logical Records by Connection" request buffer:
Offset  Size    Description     (Table 02061)
 00h    WORD    0005h (length of following data)
 02h    BYTE    DFh (subfunction "Get Logical Records By Connection")
 03h    WORD    (big-endian) logical connection number
 05h    WORD    (big-endian) last record seen (0000h on first call)
SeeAlso: #02062,#02238 at AX=F217h/SF=DFh

Format of NetWare "Get Logical Records by Connection" reply buffer:
Offset  Size    Description     (Table 02062)
 00h    WORD    (call) size of following results record (max 1FEh)
 02h    WORD    next request record (place in "last record" field on next call)
                0000h if no more locked records
 04h    BYTE    number of records following
 05h    var     array of Logical Lock Information Records (see #02063)
SeeAlso: #02061,#02238 at AX=F217h/SF=DFh

Format of NetWare Logical Lock Information Record:
Offset  Size    Description     (Table 02063)
 00h    BYTE    task number
 01h    BYTE    lock status (see #02057)
 02h    BYTE    length of logical lock's name
 03h  N BYTEs   logical lock's name
SeeAlso: #02062
--------N-21E3--SFE0-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET LOGICAL RECORD INFORMATION
        AH = E3h subfn E0h
        DS:SI -> request buffer (see #02064)
        ES:DI -> reply buffer (see #02065)
Return: AL = status (00h,C6h) (see #02053)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=DDh,AH=E3h/SF=DFh,AH=E3h/SF=E2h
SeeAlso: AX=F217h/SF=E0h

Format of NetWare "Get Logical Record Information" request buffer:
Offset  Size    Description     (Table 02064)
 00h    WORD    length of following data (max 67h)
 02h    BYTE    E0h (subfunction "Get Logical Record Information")
 03h    WORD    (big-endian) last record seen (0000h on first call)
 05h    BYTE    length of logical record's name
 06h  N BYTEs   logical record's name
SeeAlso: #02065,#02239 at AH=E3h/SF=E0h

Format of NetWare "Get Logical Record Information" reply buffer:
Offset  Size    Description     (Table 02065)
 00h    WORD    (call) size of following results record (max 200h)
 02h    WORD    (big-endian) number of logical connections logging the record
 04h    WORD    (big-endian) number of logical connections with shareable lock
 06h    WORD    (big-endian) next request record (place in "last record" field
                  on next call)
 08h    BYTE    locked exclusively if nonzero
 09h    BYTE    number of records following
 0Ah    var     array of Task Information Records (see #02066)
SeeAlso: #02064,#02239 at AH=E3h/SF=E0h

Format of NetWare Task Information Record:
Offset  Size    Description     (Table 02066)
 00h    WORD    (big-endian) logical connection number
 02h    BYTE    task number
 03h    BYTE    lock status (see #02057)
SeeAlso: #02065
--------N-21E3--SFE1-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET CONNECTION'S SEMAPHORES
        AH = E3h subfn E1h
        DS:SI -> request buffer (see #02067)
        ES:DI -> reply buffer (see #02068)
Return: AL = status (00h,C6h) (see #02053)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=DBh,AH=E3h/SF=DFh,AH=E3h/SF=E2h
SeeAlso: AX=F217h/SF=E1h

Format of NetWare "Get Connection's Semaphores" request buffer:
Offset  Size    Description     (Table 02067)
 00h    WORD    0005h (length of following data)
 02h    BYTE    E1h (subfunction "Get Connection's Semaphores")
 03h    WORD    (big-endian) logical connection number
 05h    WORD    (big-endian) last record seen (0000h on first call)
SeeAlso: #02068,#02240 at AX=F217h/SF=E1h

Format of NetWare "Get Connection's Semaphores" reply buffer:
Offset  Size    Description     (Table 02068)
 00h    WORD    (call) size of following results record (max 1FEh)
 02h    WORD    next request record (place in "last record" field on next call)
 04h    BYTE    number of records following
 05h    var     array of Semaphore Information Records (see #02069)
SeeAlso: #02067,#02240 at AX=F217h/SF=E1h

Format of NetWare Semaphore Information Record:
Offset  Size    Description     (Table 02069)
 00h    WORD    (big-endian) open count
 02h    BYTE    semaphore value (-128 to 127)
 03h    BYTE    task number
 04h    BYTE    lock type
 05h    BYTE    length of semaphore's name
 06h  N BYTEs   semaphore's name
     14 BYTEs   filename
SeeAlso: #02068
--------N-21E3--SFE2-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET SEMAPHORE INFORMATION
        AH = E3h subfn E2h
        DS:SI -> request buffer (see #02070)
        ES:DI -> reply buffer (see #02071)
Return: AL = status (00h,C6h) (see #02053)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=E1h,AX=F217h/SF=E2h

Format of NetWare "Get Semaphore Information" request buffer:
Offset  Size    Description     (Table 02070)
 00h    WORD    length of following data (max 83h)
 02h    BYTE    E2h (subfunction "Get LAN Driver's Configuration Information")
 03h    WORD    (big-endian) last record seen (0000h on first call)
 05h    BYTE    length of semaphore's name (01h-7Fh)
 06h  N BYTEs   semaphore's name
SeeAlso: #02071,#02241 at AX=F217h/SF=E2h

Format of NetWare "Get Semaphore Information" reply buffer:
Offset  Size    Description     (Table 02071)
 00h    WORD    (call) size of following results buffer (max 1FEh)
 02h    WORD    next request record (place in "last record" on next call)
                0000h if no more
 04h    WORD    (big-endian) number of logical connections opening semaphore
 06h    BYTE    semaphore value (-127 to 128)
 07h    BYTE    number of records following
 08h    var     array of Semaphore Information records (see #02072)
SeeAlso: #02071,#02241 at AX=F217h/SF=E2h

Format of NetWare Semaphore Information:
Offset  Size    Description     (Table 02072)
 00h    WORD    (big-endian) logical connection number
 02h    BYTE    task number
SeeAlso: #02071
--------N-21E3--SFE3-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET LAN DRIVER'S CONFIGURATION INFO
        AH = E3h subfn E3h
        DS:SI -> request buffer (see #02073)
        ES:DI -> reply buffer (see #02074)
Return: AL = status (00h,C6h) (see #02053)
Notes:  this function is supported by Advanced NetWare 2.1+
        the calling workstation must have console operator privileges
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=E7h,AH=E3h/SF=E8h,AX=F217h/SF=E3h

Format of NetWare "Get LAN Driver's Configuration Info" request buffer:
Offset  Size    Description     (Table 02073)
 00h    WORD    0002h (length of following data)
 02h    BYTE    E3h (subfunction "Get LAN Driver's Configuration Information")
 03h    BYTE    LAN board (00h-03h)
SeeAlso: #02074,#02242 at AX=F217h/SF=E3h

Format of NetWare "Get LAN Driver's Configuration Info" reply buffer:
Offset  Size    Description     (Table 02074)
 00h    WORD    (call) 00ACh (size of following results buffer)
 02h  4 BYTEs   network number
 06h  6 BYTEs   node number
 0Ch    BYTE    LAN driver installed (00h no--remaining fields invalid)
 0Dh    BYTE    option number selected at configuration time
 0Eh 160 BYTEs  configuration text
                ASCIZ hardware type
                ASCIZ hardware settings
SeeAlso: #02073,#02242 at AX=F217h/SF=E3h
--------N-21E3--SFE5-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET CONNECTION'S USAGE STATISTICS
        AH = E3h subfn E5h
        DS:SI -> request buffer (see #02075)
        ES:DI -> reply buffer (see #02076)
Return: AL = status (00h,C6h) (see #02053)
Notes:  this function is supported by Advanced NetWare 2.1+
        one must have console operator privileges to get statistics for logical
          connections other than one's own
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=DAh,AH=E3h/SF=DBh,AH=E3h/SF=E1h
SeeAlso: AX=F217h/SF=E5h

Format of NetWare "Get Connection's Usage Statistics" request buffer:
Offset  Size    Description     (Table 02075)
 00h    WORD    0003h (length of following data)
 02h    BYTE    E5h (subfunction "Get Connection's Usage Statistics")
 03h    WORD    (big-endian) logical connection number
SeeAlso: #02076,#02243 at AX=F217h/SF=E5h

Format of NetWare "Get Connection's Usage Statistics" reply buffer:
Offset  Size    Description     (Table 02076)
 00h    WORD    (call) 0014h (size of following results record)
 02h    DWORD   (big-endian) clock ticks since server started
 06h  6 BYTEs   bytes read
 0Ch  6 BYTEs   bytes written
 12h    DWORD   (big-endian) total request packets
SeeAlso: #02075,#02243 at AX=F217h/SF=E5h
--------N-21E3--SFE6-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET BINDERY OBJECT DISK SPACE LEFT
        AH = E3h subfn E6h
        DS:SI -> request buffer (see #02077)
        ES:DI -> reply buffer (see #02078)
Return: AL = status (00h,C6h) (see #02053)
Notes:  this function is supported by Advanced NetWare 2.1+
        one must have console operator privileges to get the free space for
          other bindery objects
SeeAlso: AH=E3h/SF=C8h,AH=E3h/SF=E8h,AH=E3h/SF=E9h

Format of NetWare "Get Bindery Object Disk Space Left" request buffer:
Offset  Size    Description     (Table 02077)
 00h    WORD    0005h (length of following data)
 02h    BYTE    E6h (subfunction "Get Bindery Object Disk Space Left")
 03h    DWORD   (big-endian) object ID
SeeAlso: #02078,#02244 at AX=F217h/SF=E6h

Format of NetWare "Get Bindery Object Disk Space Left" reply buffer:
Offset  Size    Description     (Table 02078)
 00h    WORD    (call) 000Fh (size of following results buffer)
 02h    DWORD   (big-endian) clock ticks elapsed since server started
 06h    DWORD   (big-endian) object ID
 0Ah    DWORD   (big-endian) 4K disk blocks available to user
 0Eh    BYTE    restrictions (00h enforced, FFh not enforced)
SeeAlso: #02077,#02244 at AX=F217h/SF=E6h
--------N-21E3--SFE7-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET FILE SERVER LAN I/O STATISTICS
        AH = E3h subfn E7h
        DS:SI -> request buffer (see #02079)
        ES:DI -> reply buffer (see #02080)
Return: AL = status
            00h successful
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: AH=E3h/SF=0Eh,AH=E3h/SF=11h,AH=E3h/SF=D3h,AH=E3h/SF=E8h
SeeAlso: AH=E7h"Novell",AX=F217h/SF=E7h

Format of NetWare "Get File Server LAN I/O Statistics" request buffer:
Offset  Size    Description     (Table 02079)
 00h    WORD    0001h (length of following data)
 02h    BYTE    E7h (subfunction "Get File Server LAN I/O Statistics")
SeeAlso: #02080,#02245 at AX=F217h/SF=E7h

Format of NetWare "Get File Server LAN I/O Statistics" reply buffer:
Offset  Size    Description     (Table 02080)
 00h    WORD    (call) 0042h (size of following results buffer)
 02h    DWORD   clock ticks since system started
 06h    WORD    total routing buffers
 08h    WORD    maximum routing buffers used
 0Ah    WORD    current routing buffers used
 0Ch    DWORD   total file service packets
 10h    WORD    number of file service packets buffered
 12h    WORD    number of invalid connection packets
 14h    WORD    packets with bad logical connection numbers
 16h    WORD    number of packets received during processing
 18h    WORD    number of requests reprocessed
 1Ah    WORD    packets with bad sequence numbers
 1Ch    WORD    number of duplicate replies sent
 1Eh    WORD    number of acknowledgements sent
 20h    WORD    number of packets with bad request types
 22h    WORD    requests to attach to ws for which a request is being processed
 24h    WORD    requests to attach from ws which is already attaching
 26h    WORD    number of forged detach requests
 28h    WORD    detach requests with bad connection number
 2Ah    WORD    requests to detach from ws for which requests pending
 2Ch    WORD    number of cancelled replies
 2Eh    WORD    packets discarded due to excessive hop count
 30h    WORD    packets discarded due to unknown net
 32h    WORD    incoming packets discarded for lack of DGroup buffer
 34h    WORD    outgoing packets discarded due to lack of buffer
 36h    WORD    received packets destined for B,C, or D side drivers
 38h    DWORD   number of NetBIOS packets propagated through net
 3Ch    DWORD   total number of non-file-service packets
 40h    DWORD   total number of routed packets
Note:   all fields except the first are big-endian
SeeAlso: #02080,#02245 at AX=F217h/SF=E7h
--------N-21E3--SFE8-------------------------
INT 21 - Novell NetWare - FILE SERVER - GET FILE SERVER MISC INFORMATION
        AH = E3h subfn E8h
        DS:SI -> request buffer (see #02081)
        ES:DI -> reply buffer (see #02082)
Return: AL = status (00h,C6h) (see #02053)
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: AH=E3h/SF=0Eh,AH=E3h/SF=11h,AH=E3h/SF=CDh,AH=E3h/SF=E7h
SeeAlso: AX=F217h/SF=E8h

Format of NetWare "Get File Server Misc Information" request buffer:
Offset  Size    Description     (Table 02081)
 00h    WORD    0001h (length of following data)
 02h    BYTE    E8h (subfunction "Get File Server Misc Information")
SeeAlso: #02082,#02246 at AX=F217h/SF=E8h

Format of NetWare "Get File Server Misc Information" reply buffer:
Offset  Size    Description     (Table 02082)
 00h    WORD    (call) size of following results buffer (max 0048h)
 02h    DWORD   (big-endian) clock ticks since system started
 06h    BYTE    CPU type
                00h Motorola 68000
                01h Intel 8086, 8088, or V20
                02h Intel 80286+
 07h    BYTE    reserved
 08h    BYTE    number of service processes in server
 09h    BYTE    server utilization in percent
 0Ah    WORD    (big-endian) maximum bindery objects set by configuration
                0000h = unlimited
 0Ch    WORD    (big-endian) maximum number of bindery objects used
 0Eh    WORD    (big-endian) current number of bindery objects in use
 10h    WORD    (big-endian) total server memory in KB
 12h    WORD    (big-endian) wasted server memory in KB
                normally 0000h
 14h    WORD    number of records following (01h-03h)
 16h    var     array of Dynamic Memory Information records (see #02083)
SeeAlso: #02081,#02246 at AX=F217h/SF=E8h

Format of NetWare Dynamic Memory Information:
Offset  Size    Description     (Table 02083)
 00h    DWORD   (big-endian) total dynamic space
 04h    DWORD   (big-endian) maximum dynamic space used
 08h    DWORD   (big-endian) current dynamic space usage
--------N-21E3--SFE9-------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - GET VOLUME INFORMATION
        AH = E3h subfn E9h
        DS:SI -> request buffer (see #02084)
        ES:DI -> reply buffer (see #02085)
Return: AL = status
            00h successful
Notes:  this function is supported by Advanced NetWare 2.1+
SeeAlso: AH=DAh,AH=E2h/SF=15h,AX=F217h/SF=E9h

Format of NetWare "Get Volume Information" request buffer:
Offset  Size    Description     (Table 02084)
 00h    WORD    0002h (length of following data)
 02h    BYTE    E9h (subfunction "Get Volume Information")
 03h    BYTE    directory handle
SeeAlso: #02085,#02247 at AX=F217h/SF=E9h

Format of NetWare "Get Volume Information" reply buffer:
Offset  Size    Description     (Table 02085)
 00h    WORD    (call) 0028h (length of following results buffer)
 02h    DWORD   (big-endian) elapsed system time
 06h    BYTE    volume number
 07h    BYTE    logical drive number
 08h    WORD    (big-endian) sectors per block
 0Ah    WORD    (big-endian) starting block
 0Ch    WORD    (big-endian) total blocks on volume
 0Eh    WORD    (big-endian) blocks available on volume
 10h    WORD    (big-endian) total directory slots
 12h    WORD    (big-endian) directory slots available
 14h    WORD    (big-endian) maximum directory entries actually used
 16h    BYTE    flag: volume hashed if nonzero
 17h    BYTE    flag: volume cached if nonzero
 18h    BYTE    flag: volume removable if nonzero
 19h    BYTE    flag: volume mounted if nonzero
 1Ah 16 BYTEs   NUL-padded volume name
SeeAlso: #02084,#02247 at AX=F217h/SF=E9h
--------N-21E4-------------------------------
INT 21 O - Novell NetWare - SET FILE ATTRIBUTES (FCB)
        AH = E4h
        CL = file attributes (see #02086)
        DX:DX -> FCB (see #01345 at AH=0Fh)
Return: AL = error code
Note:   this function was added in NetWare 4.0, but was removed some time prior
          to Advanced NetWare 2.15, and is no longer listed in current Novell
          documentation
SeeAlso: AX=4301h

Bitfields for NetWare file attributes:
Bit(s)  Description     (Table 02086)
 0      read only
 1      hidden
 2      system
 7      shareable
--------v-21E4-------------------------------
INT 21 - VIRUS - "Anarkia" - INSTALLATION CHECK
        AH = E4h
Return: AH = 04h if resident
SeeAlso: AH=E1h"VIRUS",AH=E7h"VIRUS"
--------T-21E400-----------------------------
INT 21 - DoubleDOS - INSTALLATION CHECK/PROGRAM STATUS
        AX = E400h
Return: AL = program status
            00h if DoubleDOS not present
            01h if running in visible DoubleDOS partition
            02h if running in the invisible DoubleDOS partition
SeeAlso: AH=E5h"DoubleDOS",AX=F400h
--------E-21E400-----------------------------
INT 21 - OS/286, OS/386 - CHAIN TO REAL-MODE HANDLER
        AX = E400h
        ???
Return: ???
Note:   protected mode only???
--------E-21E402-----------------------------
INT 21 - OS/286, OS/386 - SET PROTECTED-MODE TASK GATE
        AX = E402h
        ???
Return: ???
Note:   protected mode only???
SeeAlso: AX=E403h
--------E-21E403-----------------------------
INT 21 - OS/286, OS/386 - REMOVE PROTECTED-MODE TASK GATE
        AX = E403h
        ???
Return: ???
Note:   protected mode only???
SeeAlso: AX=E402h
--------N-21E5-------------------------------
INT 21 O - Novell NetWare - UPDATE FILE SIZE (FCB)
        AH = E5h
        DS:DX -> FCB (see #01345 at AH=0Fh)
Return: AL = (unreliable) return code
Notes:  this function was added in NetWare 4.0, but was removed some time prior
          to Advanced NetWare 2.15, and is no longer listed in current Novell
          documentation
        on success, NetWare sets AL to zero; on errors it restores AL
--------T-21E5-------------------------------
INT 21 - DoubleDOS - OTHER PROGRAM STATUS
        AH = E5h
Return: AL = status
            00h no program in other partition
            01h program in other partition is running
            02h program in other partition is suspended
SeeAlso: AX=E400h"DoubleDOS",AH=F5h"DoubleDOS"
--------E-21E500-----------------------------
INT 21 - OS/286, OS/386 - HEAP MANAGEMENT STRATEGY
        AX = E500h
        ???
Return: ???
SeeAlso: AX=E501h
--------E-21E501-----------------------------
INT 21 - OS/286, OS/386 - FORCE HEAP COMPACTION
        AX = E501h
        ???
Return: ???
SeeAlso: AX=E500h
--------N-21E6-------------------------------
INT 21 O - Novell NetWare - COPY FILE TO FILE (FCB)
        AH = E6h
        CX:DX = number of bytes to copy
        DS:SI -> opened source FCB
        ES:DI -> opened destination FCB
Return: AL = error code
        CX = ???
        DX = ???
Note:   this function was added in NetWare 4.0, but was removed some time prior
          to Advanced NetWare 2.15, and is no longer listed in current Novell
          documentation
--------E-21E6-------------------------------
INT 21 P - OS/286, OS/386 - ISSUE REAL PROCEDURE SIGNAL FROM PROTECTED MODE
        AH = E6h
        ???
Return: ???
SeeAlso: AH=E2h"OS/286"
--------N-21E7-------------------------------
INT 21 - Novell NetWare - FILE SERVER - GET FILE SERVER DATE AND TIME
        AH = E7h
        DS:DX -> date/time buffer (see #02087)
Return: AL = error code
            00h successful
            FFh unsuccessful
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+,
          Alloy NTNX, and Banyan VINES
SeeAlso: AH=2Ah,AH=2Ch,AX=5FC0h,AH=E3h/SF=CAh,AX=F214h

Format of NetWare date/time buffer:
Offset  Size    Description     (Table 02087)
 00h    BYTE    year (80-99 = 1980-1999, 0-79 = 2000-2079)
 01h    BYTE    month (1=Jan)
 02h    BYTE    day
 03h    BYTE    hours
 04h    BYTE    minutes
 05h    BYTE    seconds
 06h    BYTE    day of week (0 = Sunday) (Novell and NTNX only)
SeeAlso: #02106
--------E-21E7-------------------------------
INT 21 - OS/286, OS/386 - CREATE CODE SEGMENT
        AH = E7h
        ???
Return: ???
SeeAlso: AH=E8h"OS/286",AH=E9h"OS/286",AH=EAh"OS/286"
--------v-21E7-------------------------------
INT 21 - VIRUS - "Spyer"/"Kiev" - INSTALLATION CHECK
        AH = E7h
Return: AH = 78h if resident
SeeAlso: AH=E4h"VIRUS",AX=EC59h
--------N-21E8-------------------------------
INT 21 O - Novell NetWare, Alloy NTNX - SET FCB RE-OPEN MODE
        AH = E8h
        DL = mode
            00h no automatic re-open
            01h auto re-open
Return: AL = error code
Desc:   provided backward compatibility with a bug in CP/M and early DOS vers
Note:   this function was added in NetWare 4.6, but was removed some time prior
          to Advanced NetWare 2.15, and is no longer listed in current Novell
          documentation
--------E-21E8-------------------------------
INT 21 - OS/286, OS/386 - SEGMENT CREATION
        AH = E8h
        AL = type
            00h data segment
            01h data window/alias
            02h real segment
            03h real window/alias
                CX:DX = size in bytes
                SI:BX -> start of desired memory block
                Return: AX = selector
            06h shareable segment
        ???
Return: ???
SeeAlso: AH=E7h"OS/286",AH=E9h"OS/286"
--------T-21E8-------------------------------
INT 21 - DoubleDOS - SET/RESET KEYBOARD CONTROL FLAGS
        AH = E8h
        AL = program for which to set flags (00h this program, 01h other)
        DX = keyboard control flags (see #02088)
Return: DX = previous flags
Notes:  disabling Ctrl-PrtSc will allow the program to intercept the keystroke;
          disabling any of the other keystrokes disables them completely
        identical to AH=F8h
SeeAlso: AH=E1h"DoubleDOS",AH=E2h"DoubleDOS",AH=E3h"DoubleDOS"
SeeAlso: AH=F8h"DoubleDOS"

Bitfields for DoubleDOS keyboard control flags:
Bit(s)  Description     (Table 02088)
 0      menu
 1      exchange
 2      entire keyboard enable/disable
 3      Ctrl-C
 4      Ctrl-PrtSc
 5      Alt/Erase
 6      Ctrl-Break
 7      Ctrl-NumLock
 8      shift-PrtSc
 9-13   undefined
 14     cancel key (clear keyboard buffer)
 15     suspend key
Note:   setting a enables the corresponding key or operatin, clearing a
          disables it
--------E-21E9-------------------------------
INT 21 P - OS/286, OS/386 - CHANGE SEGMENTS
        AH = E9h
        AL = function
            01h change code segment parameters
            02h change data segment parameters
            05h adjust segment limit
            06h change segment base address
        ???
Return: ???
SeeAlso: AH=E7h"OS/286",AH=E8h"OS/286",AH=EAh"OS/286",AH=EDh"OS/286"
SeeAlso: INT 31/AX=0007h,INT 31/AX=0008h
--------T-21E9-------------------------------
INT 21 - DoubleDOS - SET TIMESHARING PRIORITY
        AH = E9h
        AL = new priority (see #02089)
Return: AL = priority setting if AL=05h on entry
Note:   identical to AH=F9h
SeeAlso: AH=EAh"DoubleDOS",AH=EBh"DoubleDOS",AH=F9h"DoubleDOS"

(Table 02089)
Values for DoubleDOS timesharing priority:
 00h    visible program gets 70%, invisible gets 30% (default)
 01h    visible program gets 50%, invisible gets 50%
 02h    visible program gets 30%, invisible gets 70%
 03h    Top program gets 70%, bottom program gets 30%
 04h    Top program gets 30%, bottom program gets 70%
 05h    get current priority
--------N-21E900-----------------------------
INT 21 - Novell NetWare - DIRECTORY SERVICES - GET DIRECTORY HANDLE
        AX = E900h
        DX = drive number to check (0 = A:, ..., 25 = Z:, 26 ... 31)
Return: AL = directory handle
        AH = flags (drive not mapped if none set)
            bit 0: permanent handle
            bit 1: temporary handle
            bit 7: mapped to local drive
Note:   this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=E2h/SF=00h,AH=E2h/SF=01h,AH=E2h/SF=0Ah
--------v-21E900-----------------------------
INT 21 - VIRUS - "Dark End" - INSTALLATION CHECK
        AX = E900h
Return: AX = 1234h if resident
SeeAlso: AX=DEFEh"VIRUS",AX=EC27h"VIRUS"
--------N-21E905-----------------------------
INT 21 - Novell NetWare shell 3.01 - MAP A FAKE ROOT DIRECTORY
        AX = E905h
        BL = drive number (0=default, 1=A:, ...)
        DS:DX -> ASCIZ path for fake root (may include server name or be empty)
Return: CF set on error
            AL = error code (03h,0Fh,11h) (see #01680 at AH=59h/BX=0000h)
        CF clear if successful
Note:   if drive is not currently mapped, a drive mapping will be created
SeeAlso: AX=E906h
--------N-21E906-----------------------------
INT 21 - Novell NetWare shell 3.01 - DELETE FAKE ROOT DIRECTORY
        AX = E906h
        BL = drive number (0=default, 1=A:, ...)
Return: AL = completion code
Note:   drive remains mapped
SeeAlso: AX=E905h
--------N-21E907-----------------------------
INT 21 - Novell NetWare shell 3.01 - GET RELATIVE DRIVE DEPTH
        AX = E907h
        BL = drive number (0=default, 1=A:, ...)
Return: AL = number of directories below the fake root
            FFh if no fake root assigned
SeeAlso: AX=E905h
--------N-21E908BL00-------------------------
INT 21 - Novell NetWare shell 3.01 - SET SHOW DOTS
        AX = E908h
        BL = 00h        don't return '.' or '..' during directory scans
           = nonzero    directory scans will return '.' or '..' entries
Return: BL = previous show-dots setting
--------N-21E909-----------------------------
INT 21 - Novell NetWare - NetWare shell - CONVERT DOS FILE HANDLE TO NETWARE
        AX = E909h
        BX = DOS file handle
Return: AX = 0000h if successful
            BX:CX:DX = NetWare file handle
Notes:  this function is partially a reverse of "AttachHandle" (AH=B4h)
        many NetWare 3.x functions use a four-byte file handle, which appears
          to be the high four bytes of the six-byte NetWare handle
SeeAlso: AH=B4h"NetWare"
--------N-21EA-------------------------------
INT 21 - Novell NetWare, Alloy NTNX - RETURN SHELL VERSION
        AH = EAh
        AL = return version environment string
            00h         don't return string
            nonzero     get environment string
                ES:DI -> 40-byte buffer for string
                Return: buffer filled with three null-terminated entries:
                        major operating system
                        version
                        hardware type
Return: AH = operating system (00h = MS-DOS)
        AL = hardware type
            00h IBM PC
            01h Victor 9000
        BH = major shell version
        BL = minor shell version
        CH = (v3.01+) shell type
            00h conventional memory
            01h expanded memory
            02h extended memory
        CL = shell revision number
Note:   this function is supported by NetWare 4.6 and Advanced NetWare 1.0+
SeeAlso: INT DF"Victor"
--------T-21EA-------------------------------
INT 21 - DoubleDOS - TURN OFF TASK SWITCHING
        AH = EAh
Return: task switching turned off
SeeAlso: AH=E9h"DoubleDOS",AH=EBh"DoubleDOS",AH=FAh"DoubleDOS"
SeeAlso: INT FA"DoubleDOS"
--------E-21EA-------------------------------
INT 21 - OS/286, OS/386 - ALLOCATE HUGE SEGMENT
        AH = EAh
        ???
Return: ???
Note:   protected mode only???
SeeAlso: AH=E7h"OS/286",AH=E8h"OS/286",AH=E9h"OS/286"
--------N-21EB-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - LOG FILE
        AH = EBh
        DS:DX -> ASCIZ filename
        if function C6h lock mode 01h:
            AL = flags
                00h log file only
                01h lock as well as log file
                    BP = lock timeout in timer ticks (1/18 second)
                        0000h = don't wait if file already locked
Return: AL = status (see #02090)
Desc:   add the location and size of the specified file to the log table and
          optionally lock the file
Note:   this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=BCh"NetWare",AH=CAh,AH=D0h,AH=ECh"NetWare",AH=EDh"NetWare"

(Table 02090)
Values for NetWare status:
 00h    successful
 96h    no dynamic memory for file
 FEh    timed out
 FFh    failed
SeeAlso: #02053
--------T-21EB-------------------------------
INT 21 - DoubleDOS - TURN ON TASK SWITCHING
        AH = EBh
Return: task switching turned on
SeeAlso: AH=E9h"DoubleDOS",AH=EAh"DoubleDOS",AH=FBh"DoubleDOS"
SeeAlso: INT FB"DoubleDOS"
--------E-21EB00-----------------------------
INT 21 - OS/386 VMM - GET A PAGE TABLE ENTRY BY LINEAR ADDRESS
        AX = EB00h
        ???
Return: ???
Note:   protected mode only???
SeeAlso: AX=EB02h,AX=EB04h,INT 31/AX=0506h
--------E-21EB02-----------------------------
INT 21 - OS/386 VMM - GET A PAGE TABLE ENTRY BY 16-BIT SEGMENT:OFFSET
        AX = EB02h
        ???
Return: ???
Note:   protected mode only???
SeeAlso: AX=EB00h,AX=EB04h
--------E-21EB03-----------------------------
INT 21 - OS/386 VMM - FREE MAPPED PAGES
        AX = EB03h
        ???
Return: ???
Note:   protected mode only???
SeeAlso: AX=EB05h,INT 31/AX=0801h
--------E-21EB04-----------------------------
INT 21 - OS/386 VMM - GET A PAGE TABLE ENTRY BY 32-BIT SEGMENT:OFFSET
        AX = EB04h
        ???
Return: ???
Note:   protected mode only???
SeeAlso: AX=EB00h,AX=EB02h
--------E-21EB05-----------------------------
INT 21 - OS/386 VMM - MAP PAGES
        AX = EB05h
        ???
Return: ???
Note:   protected mode only???
SeeAlso: AX=EB03h,INT 31/AX=0800h
--------E-21EB06-----------------------------
INT 21 - OS/386 VMM - LOCK PAGES IN MEMORY
        AX = EB06h
        ???
Return: ???
Note:   protected mode only???
SeeAlso: AX=EB07h,INT 31/AX=0600h
--------E-21EB07-----------------------------
INT 21 - OS/386 VMM - UNLOCK MEMORY PAGES
        AX = EB07h
        ???
Return: ???
Note:   protected mode only???
SeeAlso: AX=EB06h,INT 31/AX=0601h
--------N-21EC-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - RELEASE FILE
        AH = ECh
        DS:DX -> ASCIZ filename
Return: AL = status
            00h successful
            FFh file not found
Desc:   unlock the specified file but retain it in the log table
Note:   this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=CDh,AH=EBh"NetWare",AH=EDh"NetWare"
--------T-21EC-------------------------------
INT 21 - DoubleDOS - GET VIRTUAL SCREEN ADDRESS
        AH = ECh
Return: ES = segment of virtual screen
Desc:   determine the address of the virtual screen to which the program
          should write instead of the actual video memory, so that the
          multitasked programs do not interfere with each other's output
Notes:  screen address can change if task-switching is on!
        identical to AH=FCh
SeeAlso: INT 10/AH=FEh,AH=FCh"DoubleDOS",INT FC"DoubleDOS"
--------E-21EC-------------------------------
INT 21 - OS/286, OS/386 - BLOCK TRANSFER
        AH = ECh
        ???
Return: ???
--------v-21EC27-----------------------------
INT 21 - VIRUS - "Halloween.1839" - INSTALLATION CHECK
        AX = EC27h
Return: AX = 4A52h ("JR") if resident
SeeAlso: AH=E7h"VIRUS",AX=E900h"VIRUS",AX=EC59h"VIRUS"
--------v-21EC59-----------------------------
INT 21 - VIRUS - "Terror" - INSTALLATION CHECK
        AX = EC59h
Return: BP = EC59h if resident
SeeAlso: AX=EC27h"VIRUS",AH=EEh"VIRUS"
--------N-21ED-------------------------------
INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - CLEAR FILE
        AH = EDh
        DS:DX -> ASCIZ filename
Return: AL = status
            00h successful
            FFh no files found
Desc:   unlock the file and remove it from the log table
Note:   this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=CBh"NetWare",AH=CEh,AH=CFh,AH=EBh"NetWare",AH=ECh"NetWare"
--------E-21ED-------------------------------
INT 21 - OS/286, OS/386 - GET SEGMENT OR WINDOW DESCRIPTOR
        AH = EDh
        ???
Return: ???
Note:   protected mode only???
SeeAlso: AH=E9h"OS/286"
--------N-21EE-------------------------------
INT 21 - Novell NetWare - CONNECTION SERVICES - GET PHYSICAL STATION ADDRESS
        AH = EEh
Return: CX:BX:AX = six-byte physical address
Note:   this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
          Alloy NTNX
SeeAlso: AH=E3h/SF=13h
--------T-21EE-------------------------------
INT 21 - DoubleDOS - GIVE AWAY TIME TO OTHER TASKS
        AH = EEh
        AL = number of 55ms time slices to give away
Return: returns after giving away time slices
SeeAlso: AH=FEh"DoubleDOS",INT FE"DoubleDOS"
--------v-21EE-------------------------------
INT 21 - VIRUS - "Jerusalem-G", "Pregnant", "Barrotes" - INSTALLATION CHECK
        AH = EEh
Return: AX = 0300h if "Jerusalem-G" resident
        AL = 05h if "Pregnant" resident
        AL = FEh if "Barrotes" resident
SeeAlso: AH=DDh"VIRUS",AX=EC59h,AX=EEE7h"VIRUS"
--------v-21EEE7-----------------------------
INT 21 - VIRUS - "GingerBread" - INSTALLATION CHECK
        AX = EEE7h
Return: AX = D703h if installed
SeeAlso: AH=EEh"VIRUS",AH=EFh"VIRUS"
--------v-21EF-------------------------------
INT 21 - VIRUS - "Mabuhay"/"June 12th" - INSTALLATION CHECK
        AH = EFh
Return: AX = 025Bh if resident
SeeAlso: AX=EC27h"VIRUS",AH=EEh"VIRUS",AH=F0h"VIRUS"
--------N-21EF00-----------------------------
INT 21 - Novell NetWare - WORKSTATION - GET DRIVE HANDLE TABLE
        AX = EF00h
Return: ES:SI -> network shell's 32-byte drive handle table
        AX = 0000h
Notes:  this function is supported by Advanced NetWare 1.0+
        each byte in the drive handle table contains the directory handle for
          the corresponding drive, or 00h if not mapped to a directory
SeeAlso: AX=EF01h,AX=EF02h,AX=EF03h,AX=EF04h
--------N-21EF01-----------------------------
INT 21 - Novell NetWare - WORKSTATION - GET DRIVE FLAG TABLE
        AX = EF01h
Return: ES:SI -> network shell's 32-byte drive flag table (see #02091)
        AX = 0000h
Notes:  this function is supported by Advanced NetWare 1.0+
        each byte in the drive flag table corresponds to a drive
SeeAlso: AX=EF00h,AX=EF02h,AX=EF03h

(Table 02091)
Values in NetWare drive flag table:
 00h    drive is not mapped
 01h    permanent network drive
 02h    temporary network drive
 80h    mapped to local drive
 81h    local drive used as permanent network drive
 82h    local drive used as temporary network drive
--------N-21EF02-----------------------------
INT 21 - Novell NetWare - WORKSTATION - GET DRIVE CONNECTION ID TABLE
        AX = EF02h
Return: ES:SI -> network shell's 32-byte drive conection ID table
        AX = 0000h
Notes:  this function is supported by Advanced NetWare 1.0+
        each byte in the connection ID table corresponds to a drive and
          contains either the connection ID (1-8) of the server for that drive
          or 00h if the drive is not mapped to a file server
SeeAlso: AX=EF01h,AX=EF03h,AX=F002h
--------N-21EF03-----------------------------
INT 21 - Novell NetWare - WORKSTATION - GET CONNECTION ID TABLE
        AX = EF03h
Return: ES:SI -> network shell's connection ID table (see #02092)
        AX = 0000h
Note:   this function is supported by Advanced NetWare 1.0+
SeeAlso: AX=EF00h,AX=EF02h,AX=EF04h,AX=F002h

Format of NetWare connection ID table [one entry of eight-element array]:
Offset  Size    Description     (Table 02092)
 00h    BYTE    in-use flag
                E0h AES temporary
                F8h IPX in critical section
                FAh processing
                FBh holding
                FCh AES waiting
                FDh waiting
                FEh receiving
                FFh sending
 01h    BYTE    order number assigned to server (1-8)
 02h    DWORD   (big-endian) file server's network address
 06h  6 BYTEs   (big-endian) file server's node address
 0Ch    WORD    (big-endian) socket number
 0Eh    WORD    (big-endian) base receive timeout in clock ticks
 10h  6 BYTEs   (big-endian) preferred routing node
 16h    BYTE    packet sequence number
 17h    BYTE    connection number (FFh = no connection)
 18h    BYTE    connection status (00h if active)
 19h    WORD    (big-endian) maximum receive timeout in clock ticks
 1Bh    WORD    connection number (if > FAh)
 1Dh    BYTE    major version of NetWare
 1Eh    BYTE    minor version of NetWare
 1Fh    BYTE    server flags
                bit 0: server is burst enabled
--------N-21EF04-----------------------------
INT 21 - Novell NetWare - WORKSTATION - GET FILE SERVER NAME TABLE
        AX = EF04h
Return: ES:SI -> network shell's file server name table (see #02093)
        AX = 0000h
Note:   this function is supported by Advanced NetWare 1.0+
SeeAlso: AX=EF03h

Format of file server name table:
Offset  Size    Description     (Table 02093)
 00h 48 BYTEs   ASCIZ server name for first entry in connection ID table
 30h 48 BYTEs   ASCIZ server name for second entry in connection ID table
        ...
150h 48 BYTEs   ASCIZ server name for eighth entry in connection ID table
--------T-21F0-------------------------------
INT 21 - DoubleDOS - MENU CONTROL
        AH = F0h
        AL = subfunction
            01h exchange tasks
            73h resume invisible job if suspended
            74h kill other job
            75h suspend invisible job
Note:   identical to AH=E0h
SeeAlso: AH=E0h"DoubleDOS"
--------v-21F0-------------------------------
INT 21 - VIRUS - "Frere Jacques" - INSTALLATION CHECK
        AH = F0h
Return: AX = 0300h if resident
SeeAlso: AH=EEh"VIRUS",AX=F078h"VIRUS"
--------N-21F000-----------------------------
INT 21 - Novell NetWare - WORKSTATION - SET PREFERRED CONNECTION ID
        AX = F000h
        DL = connection ID of prefered file server (1-8) or 00h for none
Notes:  this function is supported by Advanced NetWare 1.0+
        the preferred connection ID is set to 00h by the shell on EOJ
SeeAlso: AH=D6h,AX=EF03h,AX=F001h,AX=F002h,AX=F005h
--------N-21F001-----------------------------
INT 21 - Novell NetWare - WORKSTATION - GET PREFERRED CONNECTION ID
        AX = F001h
Return: AL = connection ID of preferred file server (1-8), 00h if not set
Notes:  this function is supported by Advanced NetWare 1.0+
        the preferred connection ID is set to 00h by the shell on EOJ
SeeAlso: AH=D6h,AX=EF03h,AX=F000h,AX=F002h,AX=F005h
--------N-21F002-----------------------------
INT 21 - Novell NetWare - WORKSTATION - GET DEFAULT CONNECTION ID
        AX = F002h
Return: AL = connection ID of current default file server (1-8) (see AX=EF03h)
Note:   this function is supported by Advanced NetWare 1.0+
SeeAlso: AX=EF03h,AX=F000h,AX=F004h
--------N-21F003-----------------------------
INT 21 - Novell NetWare - PRINT SERVICES - GET LPT CAPTURE STATUS
        AX = F003h
Return: AH = status
            00h not active
            FFh active
                AL = connection ID (01h-08h)
Note:   this function is supported by Advanced NetWare 1.0+
SeeAlso: AX=B800h,AX=B804h,AH=DFh/DL=00h,AH=DFh/DL=04h
--------N-21F004-----------------------------
INT 21 - Novell NetWare - WORKSTATION - SET PRIMARY CONNECTION ID
        AX = F004h
        DL = connection ID of primary file server (1-8) or 00h for none
Note:   this function is supported by Advanced NetWare 2.0+
SeeAlso: AH=D6h,AX=EF03h,AX=F000h,AX=F002h,AX=F005h
--------N-21F005-----------------------------
INT 21 - Novell NetWare - WORKSTATION - GET PRIMARY CONNECTION ID
        AX = F005h
Return: AL = connection ID of primary file server (1-8), 00h if not set
Notes:  this function is supported by Advanced NetWare 2.0+
        by default, the primary file server is the one from which the login
          script executed; it is set to 00h if the workstation is not logged in
          and when it detaches from its primary file server
SeeAlso: AH=D6h,AX=EF03h,AX=F000h,AX=F002h,AX=F004h
--------v-21F078-----------------------------
INT 21 - VIRUS - "Burgler/H" - INSTALLATION CHECK
        AX = F078h
Return: AX = 0000h if installed
SeeAlso: AH=F0h"VIRUS",AH=F1h"VIRUS"
--------N-21F1-------------------------------
INT 21 - Novell NetWare - CONNECTION SERVICES - FILE SERVER CONNECTION
        AH = F1h
        AL = subfunction
            00h attach to file server
                DL = preferred file server (01h-08h)
            01h detach from file server
                DL = connection ID
            02h logout from file server
                DL = connection ID
Return: AL = status (see #02094)
Note:   these functions are supported by Advanced NetWare 1.0+
SeeAlso: AH=D7h"NetWare",AH=E3h/SF=14h

(Table 02094)
Values for NetWare function status:
 00h    successful
 F8h    already attached to server
 F9h    connection table full
 FAh    no more server slots
 FCh    unknown file server
 FEh    server bindery locked
 FFh    no response from server, or connection does not exist
SeeAlso: #02053,#02350
--------T-21F1-------------------------------
INT 21 - DoubleDOS - CLEAR KEYBOARD BUFFER FOR CURRENT JOB
        AH = F1h
SeeAlso: AH=E1h"DoubleDOS",AH=F2h"DoubleDOS",AH=F3h"DoubleDOS"
SeeAlso: AH=F8h"DoubleDOS"
--------v-21F1-------------------------------
INT 21 - VIRUS - "F1-337" - ???
        AH = F1h
        ???
Return: ???
SeeAlso: AH=F0h"VIRUS",AX=F1E9h
--------v-21F1E9-----------------------------
INT 21 - VIRUS - "Tremor" - INSTALLATION CHECK
        AX = F1E9h
Return: AX = installation state
            CADEh installed, and calling program is infected
            F100h not installed (normal DOS return value)
            else  installed, but calling program is not infected
SeeAlso: AH=F1h"VIRUS",AX=F2AAh
--------!---Section--------------------------
Interrupt List, part 10 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------N-21F2-------------------------------
INT 21 u - Novell NetWare v3.01+ shell interface - MULTIPLEXOR
        AH = F2h
        AL = function (see #02095)
            (subfunction stored in various places in the request packet,
            depending on function number; see individual entries)
        CX = length of request buffer
        DX = length of reply buffer (0000h if no reply packet)
        DS:SI -> request buffer
        ES:DI -> reply buffer (ignored if DX=0000h)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled as appropriate for function
Note:   this is a multiplexor providing a "raw" interface to the underlying
          NetWare Core Protocol.  Many functions which were accessed via a
          separate AH function in older versions can also be accessed here,
          but some NetWare 3.x calls appear to be available only here.
SeeAlso: AX=F244h,AX=F268h/SF=3Dh,#02875

(Table 02095)
Values for NetWare Core Protocol functions:
Fnc/Subfn       Description
01h     File Set Lock
02h     File Release Lock
03h     Log File (old)                                  (see AX=F203h)
04h     Lock File Set (old)                             (see AX=F204h)
05h     Release File                            (see AH=CCh,AH=ECh"NetWare")
06h     Release File Set                                (see AH=CDh"NetWare")
07h     Clear File                                      (see AH=CEh,AX=F207h)
08h     Clear File Set                                  (see AX=F208h)
09h     Log Logical Record (old)                        (see AH=D0h"NetWare")
0Ah     Lock Logical Record Set (old)                   (see AX=F20Ah)
0Bh     Clear Logical Record                            (see AX=F20Bh)
0Ch     Release Logical Record                          (see AH=D2h"NetWare")
0Dh     Release Logical Record Set                      (see AH=D3h"NetWare")
0Eh     Clear Logical Record Set                        (see AX=F20Eh)
0Fh     Allocate Resource                               (see AH=D8h"NetWare")
10h     Deallocate Resource                             (see AH=D9h"NetWare")
11h/xxh print spooling                                  (see AH=E0h"NetWare")
11h/06h Get Printer Status
11h/0Ah Get Printer Queue
12h     Get Volume Info with Number                     (see AH=DAh"NetWare")
13h     Get Station Number                              (see AH=DCh"NetWare")
14h     Get File Server Date and Time (NW v2.2+)        (see AH=E7h"NetWare")
15h/01h Get Broadcast Message (old)                     (see AX=F215h/SF=01h)
15h/02h Disable Broadcasts                              (see AX=F215h/SF=02h)
15h/03h Enable Broadcasts                               (see AX=F215h/SF=03h)
15h/08h Check Pipe Status               (see AH=E1h/SF=08h,AX=F215h/SF=08h)
15h/09h Broadcast to Console            (see AH=E1h/SF=09h,AX=F215h/SF=09h)
15h/0Bh Get Broadcast Message                           (see AX=F215h/SF=0Bh)
16h/00h Set Directory Handle                            (see AX=F216h/SF=00h)
16h/01h Get Directory Path                              (see AX=F216h/SF=01h)
16h/02h Scan Directory Information                      (see AX=F216h/SF=02h)
16h/03h Get Effective Directory Rights (old)            (see AX=F216h/SF=03h)
16h/04h Modify Maximum Rights Mask                      (see AX=F216h/SF=04h)
16h/05h Get Volume Number                               (see AX=F216h/SF=05h)
16h/06h Get Volume Name                                 (see AX=F216h/SF=06h)
16h/0Ah Create Directory                                (see AX=F216h/SF=0Ah)
16h/0Bh Delete Directory                                (see AX=F216h/SF=0Bh)
16h/0Ch Scan Directory for Trustees                     (see AX=F216h/SF=0Ch)
16h/0Dh Add Trustee to Directory                        (see AX=F216h/SF=0Dh)
16h/0Eh Delete Trustee from Directory                   (see AX=F216h/SF=0Eh)
16h/0Fh Rename Directory                                (see AX=F216h/SF=0Fh)
16h/10h Purge Erased Files (old)                        (see AX=F216h/SF=10h)
16h/11h Recover Erased File (old)                       (see AX=F216h/SF=11h)
16h/12h Alloc Permanent Directory Handle                (see AX=F216h/SF=12h)
16h/13h Alloc Temporary Directory Handle                (see AX=F216h/SF=13h)
16h/14h Deallocate Directory Handle                     (see AX=F216h/SF=14h)
16h/15h Get Volume Info with Handle                     (see AX=F216h/SF=15h)
16h/16h Alloc Special Temporary Directory Handle        (see AX=F216h/SF=16h)
16h/19h Set Directory Information                       (see AX=F216h/SF=19h)
16h/1Ah Get Path Name of Volume-Directory Number Pair   (see AX=F216h/SF=1Ah)
16h/1Bh Scan Salvageable Files (old)                    (see AX=F216h/SF=1Bh)
16h/1Ch Recover Salvageable File (old)                  (see AX=F216h/SF=1Ch)
16h/1Dh Purge Salvageable File (old)                    (see AX=F216h/SF=1Dh)
16h/1Eh Scan a Directory                                (see AX=F216h/SF=1Eh)
16h/1Fh Get Directory Entry                             (see AX=F216h/SF=1Fh)
16h/20h Scan Volume's User Disk Restrictions            (see AX=F216h/SF=20h)
16h/21h Add User Disk Space Restriction                 (see AX=F216h/SF=21h)
16h/22h Remove User Disk Space Restrictions             (see AX=F216h/SF=22h)
16h/23h Scan Directory Space Restrictions               (see AX=F216h/SF=23h)
16h/24h Set Directory Disk Space Restriction            (see AX=F216h/SF=24h)
16h/25h Set Directory File Information                  (see AX=F216h/SF=25h)
16h/26h Scan File or Directory For Extended Trustees    (see AX=F216h/SF=26h)
16h/27h Add Extended Trustee to Directory or File       (see AX=F216h/SF=27h)
16h/28h Scan Directory Disk Space                       (see AX=F216h/SF=28h)
16h/29h Get Object Disk Usage and Restrictions          (see AX=F216h/SF=29h)
16h/2Ah Get Effective Rights                            (see AX=F216h/SF=2Ah)
16h/2Bh Remove Extended Trustee from Dir or File        (see AX=F216h/SF=2Bh)
16h/2Ch Get Volume Usage                                (see AX=F216h/SF=2Ch)
16h/2Dh Get Directory Information                       (see AX=F216h/SF=2Dh)
16h/2Eh Rename or Move                                  (see AX=F216h/SF=2Eh)
16h/2Fh Get Name Space Information                      (see AX=F216h/SF=2Fh)
16h/30h Get Name Space Directory Entry                  (see AX=F216h/SF=30h)
16h/31h Open Data Stream                                (see AX=F216h/SF=31h)
16h/32h Get Object Effective Rights                     (see AX=F216h/SF=32h)
16h/33h Get Extended Volume Info                        (see AX=F216h/SF=33h)
17h/01h Change User Password (old)                      (see AX=F217h/SF=01h)
17h/02h Get User Connection List (old)                  (see AX=F217h/SF=02h)
17h/0Ch Verify Serialization                            (see AX=F217h/SF=0Ch)
17h/0Eh Get Disk Utilization                            (see AX=F217h/SF=0Eh)
17h/0Fh Scan File Information                           (see AX=F217h/SF=0Fh)
17h/10h Set File Information                            (see AX=F217h/SF=10h)
17h/11h Get File Server Information                     (see AX=F217h/SF=11h)
17h/12h Get Network Serial Number                       (see AX=F217h/SF=12h)
17h/13h Get Internet Address (old)                      (see AX=F217h/SF=13h)
17h/14h Login Object                                    (see AX=F217h/SF=14h)
17h/15h Get Object Connection List (old)                (see AX=F217h/SF=15h)
17h/16h Get Connection Information (old)                (see AX=F217h/SF=1Ch)
17h/17h Get Encryption Key                              (see AX=F217h/SF=17h)
17h/18h Login Object Encrypted                          (see AX=F217h/SF=18h)
17h/1Ah Get Internet Address                            (see AX=F217h/SF=1Ah)
17h/1Bh Get Object Connection List                      (see AX=F217h/SF=1Bh)
17h/1Ch Get Connection Information                      (see AX=F217h/SF=1Ch)
17h/1Fh Get Connection List from Object                 (see AX=F217h/SF=1Fh)
17h/32h Create Bindery Object                           (see AX=F217h/SF=32h)
17h/33h Delete Bindery Object                           (see AX=F217h/SF=33h)
17h/34h Rename Bindery Object                           (see AX=F217h/SF=34h)
17h/35h Get Bindery Object ID                           (see AX=F217h/SF=35h)
17h/36h Get Bindery Object Name                         (see AX=F217h/SF=36h)
17h/37h Scan Bindery Object                             (see AX=F217h/SF=37h)
17h/38h Change Bindery Object Security                  (see AX=F217h/SF=38h)
17h/39h Create Property                                 (see AX=F217h/SF=39h)
17h/3Ah Delete Property                                 (see AX=F217h/SF=3Ah)
17h/3Bh Change Property Security                        (see AX=F217h/SF=3Bh)
17h/3Ch Scan Property                                   (see AX=F217h/SF=3Ch)
17h/3Dh Read Property Value                             (see AX=F217h/SF=3Dh)
17h/3Eh Write Property Value                            (see AX=F217h/SF=3Eh)
17h/3Fh Verify Bindery Object Password                  (see AX=F217h/SF=3Fh)
17h/40h Change Bindery Object Password                  (see AX=F217h/SF=40h)
17h/41h Add Bindery Object to Set                       (see AX=F217h/SF=41h)
17h/42h Delete Bindery Object from Set                  (see AX=F217h/SF=42h)
17h/43h Is Bindery Object in Set                        (see AX=F217h/SF=43h)
17h/44h Close Bindery                                   (see AX=F217h/SF=44h)
17h/45h Open Bindery                                    (see AX=F217h/SF=45h)
17h/46h Get Bindery Access Level                        (see AX=F217h/SF=46h)
17h/47h Scan Bindery Object Trustee Paths               (see AX=F217h/SF=47h)
17h/48h Get Bindery Object Access Level                 (see AX=F217h/SF=48h)
17h/49h Is Station a Manager?                           (see AX=F217h/SF=49h)
17h/4Ah Keyed Verify Bindery Object Password            (see AX=F217h/SF=4Ah)
17h/4Bh Keyed Change Bindery Object Password            (see AX=F217h/SF=4Bh)
17h/4Ch List Relations of an Object                     (see AX=F217h/SF=4Ch)
17h/64h Create Queue                                    (see AX=F217h/SF=64h)
17h/65h Destroy Queue                                   (see AX=F217h/SF=65h)
17h/66h Read Queue Current Status (old)                 (see AX=F217h/SF=66h)
17h/67h Set Queue Current Status (old)                  (see AX=F217h/SF=67h)
17h/68h Create Queue Job and File (old)                 (see AX=F217h/SF=68h)
17h/69h Close File and Start Queue Job (old)            (see AX=F217h/SF=69h)
17h/6Ah Remove Job From Queue (old)                     (see AX=F217h/SF=6Ah)
17h/6Bh Get Queue Job List (old)                        (see AX=F217h/SF=6Bh)
17h/6Ch Read Queue Job Entry (old)                      (see AX=F217h/SF=6Ch)
17h/6Dh Change Queue Job Entry (old)                    (see AX=F217h/SF=6Dh)
17h/6Eh Change Queue Job Position                       (see AX=F217h/SF=6Eh)
17h/6Fh Attach Queue Server to Queue                    (see AX=F217h/SF=6Fh)
17h/70h Detach Queue Server from Queue                  (see AX=F217h/SF=70h)
17h/72h Finish Servicing Queue Job (old)                (see AX=F217h/SF=72h)
17h/74h Change to Client Rights (old)                   (see AX=F217h/SF=74h)
17h/75h Restore Queue Server Rights                     (see AX=F217h/SF=75h)
17h/76h Read Queue Server Current Status (old)          (see AX=F217h/SF=76h)
17h/77h Set Queue Server Current Status                 (see AX=F217h/SF=77h)
17h/78h Get Queue Job File Size (old)                   (see AX=F217h/SF=78h)
17h/79h Create Queue Job and File                       (see AX=F217h/SF=79h)
17h/7Ah Read Queue Job Entry                            (see AX=F217h/SF=7Ah)
17h/7Bh Change Queue Job Entry                          (see AX=F217h/SF=7Bh)
17h/7Dh Read Queue Current Status                       (see AX=F217h/SF=7Dh)
17h/7Eh Set Queue Current Status                        (see AX=F217h/SF=7Eh)
17h/7Fh Close File and Start Queue Job                  (see AX=F217h/SF=7Fh)
17h/80h Remove Job From Queue                           (see AX=F217h/SF=80h)
17h/81h Get Queue Job List                              (see AX=F217h/SF=81h)
17h/82h Change Job Priority                             (see AX=F217h/SF=82h)
17h/83h Finish Servicing Queue Job                      (see AX=F217h/SF=83h)
17h/85h Change to Client Rights                         (see AX=F217h/SF=85h)
17h/86h Read Queue Server Current Status                (see AX=F217h/SF=86h)
17h/87h Get Queue Job File Size                         (see AX=F217h/SF=87h)
17h/96h Get Account Status                              (see AX=F217h/SF=96h)
17h/97h Submit Account Charge                           (see AX=F217h/SF=97h)
17h/98h Submit Account Hold                             (see AX=F217h/SF=98h)
17h/99h Submit Account Note                             (see AX=F217h/SF=99h)
17h/C8h Check Console Privileges                        (see AX=F217h/SF=C8h)
17h/C9h Get File Server Description Strings             (see AX=F217h/SF=C9h)
17h/CAh Set File Server Date and Time                   (see AX=F217h/SF=CAh)
17h/CBh Disable File Server Login                       (see AX=F217h/SF=CBh)
17h/CCh Enable File Server Login                        (see AX=F217h/SF=CCh)
17h/CDh Get File Server Login Status                    (see AX=F217h/SF=CDh)
17h/CEh Purge All Erased Files                          (see AX=F217h/SF=CEh)
17h/CFh Disable Transaction Tracking                    (see AX=F217h/SF=CFh)
17h/D0h Enable Transaction Tracking                     (see AX=F217h/SF=D0h)
17h/D2h Clear Connection Number (Logout Station)        (see AX=F217h/SF=D2h)
17h/D3h Down File Server                                (see AX=F217h/SF=D3h)
17h/D4h Get File System Statistics                      (see AX=F217h/SF=D4h)
17h/D5h Get Transaction Tracking Statistics             (see AX=F217h/SF=D5h)
17h/D6h Get Disk Cache Statistics                       (see AX=F217h/SF=D6h)
17h/D7h Get Drive Mapping Table                         (see AX=F217h/SF=D7h)
17h/D8h Get Physical Disk Statistics                    (see AX=F217h/SF=D8h)
17h/D9h Get Disk Channel Statistics                     (see AX=F217h/SF=D9h)
17h/DAh Get Connection's Task Information (NW v2.2)     (see AX=F217h/SF=DAh)
17h/DBh Get Connection's Open Files (old) (NW v2.2)     (see AX=F217h/SF=DBh)
17h/DCh Get Connections Using a File (NW v2.2)          (see AX=F217h/SF=DCh)
17h/DDh Get Physical Record Locks by Connection and File (old)
17h/DEh Get Physical Record Locks by File (old)         (see AX=F217h/SF=DEh)
17h/DFh Get Logical Records by Connection (old)         (see AX=F217h/SF=DFh)
17h/E0h Get Logical Record Information (old)            (see AX=F217h/SF=E0h)
17h/E1h Get Connection's Semaphores (old)               (see AX=F217h/SF=E1h)
17h/E2h Get Semaphore Information (old)                 (see AX=F217h/SF=E2h)
17h/E3h Get LAN Driver's Configuration Information      (see AX=F217h/SF=E3h)
17h/E5h Get Connection's Usage Statistics (NW v2.2)     (see AX=F217h/SF=E5h)
17h/E6h Get Object's Remaining Disk Space               (see AX=F217h/SF=E6h)
17h/E7h Get File Server LAN I/O Statistics              (see AX=F217h/SF=E7h)
17h/E8h Get File Server Misc Information                (see AX=F217h/SF=E8h)
17h/E9h Get Volume Information                          (see AX=F217h/SF=E9h)
17h/EAh Get Connection's Task Information (NW v3.11+)   (see AX=F217h/SF=EAh)
17h/EBh Get Connection's Open Files (NW v3.11+)         (see AX=F217h/SF=EBh)
17h/ECh Get Connections Using a File (NW v3.11+)        (see AX=F217h/SF=ECh)
17h/EDh Get Physical Record Locks by Connection and File (see AX=F217h/SF=EDh)
17h/EEh Get Physical Record Locks by File               (see AX=F217h/SF=EEh)
17h/EFh Get Logical Records by Connection               (see AX=F217h/SF=EFh)
17h/F0h Get Logical Record Information                  (see AX=F217h/SF=F0h)
17h/F1h Get Connection's Semaphores                     (see AX=F217h/SF=F1h)
17h/F2h Get Semaphore Information                       (see AX=F217h/SF=F2h)
17h/F3h Map Directory Number to Path                    (see AX=F217h/SF=F3h)
17h/F4h Convert Path to Directory Entry                 (see AX=F217h/SF=F4h)
17h/F5h Get File Server Extended Misc Information       (see AX=F217h/SF=F5h)
17h/F6h Get Volume Extended Information                 (see AX=F217h/SF=F6h)
17h/FEh Clear Connection Number Greater than 250        (see AX=F217h/SF=FEh)
18h     End of Job                                      (see AH=D6h"NetWare")
19h     Logout (old)                                    (see AH=D7h"NetWare")
1Ah     Log Physical Record (old)                       (see AH=BCh"NetWare")
1Bh     Lock Physical Record Set (old)                  (see AX=F21Bh)
1Ch     Release Physical Record                         (see AH=BDh"NetWare")
1Dh     Release Physical Record Set                     (see AH=C3h"NetWare")
1Eh     Clear Physical Record                           (see AX=F21Eh)
1Fh     Clear Physical Record Set                       (see AX=F21Fh)
20h/xxh semaphore services                              (see AX=C501h"NetWare")
20h/00h Open Semaphore (old)                            (see AX=C500h"NetWare")
20h/01h Examine Semaphore (old)                         (see AX=C501h"NetWare")
20h/02h Wait on Semaphore (old)                         (see AX=C502h"NetWare")
20h/03h Signal Semaphore (old)                          (see AX=C503h"NetWare")
20h/04h Close Semaphore (old)                           (see AX=C504h"NetWare")
21h     Negotiate Buffer Size
22h/00h TTS Is Available                                (see AX=C702h"NetWare")
22h/01h TTS Begin Transaction                           (see AX=C700h"NetWare")
22h/02h TTS End Transaction                             (see AX=C701h"NetWare")
22h/03h TTS Abort Transaction                           (see AX=C703h"NetWare")
22h/04h TTS Transaction Status                          (see AX=C704h"NetWare")
22h/05h TTS Get Application Thresholds                  (see AX=C705h"NetWare")
22h/06h TTS Set Application Thresholds                  (see AX=C706h"NetWare")
22h/07h TTS Get Workstation Thresholds                  (see AX=C707h"NetWare")
22h/08h TTS Set Workstation Thresholds                  (see AX=C708h"NetWare")
22h/09h TTS Get Control Flags
22h/0Ah TTS Set Control Flags
23h/01h AFP Create Directory                            (see AX=F223h/SF=01h)
23h/02h AFP Create File                                 (see AX=F223h/SF=02h)
23h/03h AFP Delete                                      (see AX=F223h/SF=03h)
23h/04h AFP Get Entry ID From Name                      (see AX=F223h/SF=04h)
23h/05h AFP Get File Information                        (see AX=F223h/SF=05h)
23h/06h AFP Get Entry ID From NetWare Handle            (see AX=F223h/SF=06h)
23h/07h AFP Rename                                      (see AX=F223h/SF=07h)
23h/08h AFP Open File Fork                              (see AX=F223h/SF=08h)
23h/09h AFP Set File Information                        (see AX=F223h/SF=09h)
23h/0Ah AFP Scan File Information                       (see AX=F223h/SF=0Ah)
23h/0Bh AFP Alloc Temporary Dir Handle                  (see AX=F223h/SF=0Bh)
23h/0Ch AFP Get Entry ID From Path Name                 (see AX=F223h/SF=0Ch)
23h/0Dh AFP 2.0 Create Directory                        (see AX=F223h/SF=0Dh)
23h/0Eh AFP 2.0 Create File                             (see AX=F223h/SF=0Eh)
23h/10h AFP 2.0 Set File Information                    (see AX=F223h/SF=10h)
23h/11h AFP 2.0 Scan File Information                   (see AX=F223h/SF=11h)
23h/12h AFP Get DOS Name from Entry ID                  (see AX=F223h/SF=12h)
23h/13h AFP Get Macintosh Info on Deleted File          (see AX=F223h/SF=13h)
3Dh     Commit File
3Eh     File Search Initialize (FindFirst)              (see AX=F23Eh)
3Fh     File Search Continue (FindNext)                 (see AX=F23Fh)
40h     Search File
42h     Close File                                      (see AX=F242h)
43h     File Create                                     (see AX=F243h)
44h     File Erase                                      (see AX=F244h)
45h     File Rename
46h     Set File Attributes
47h     Get File Size                                   (see AX=F247h)
48h     File Read
49h     File Write
4Ah     File Server Copy                                (see AX=F24Ah)
4Bh     Set File Time and Date
4Ch     File Open
4Dh     Create New File                                 (see AX=F24Dh)
4Eh     Allow Task Access to File                       (see AX=F24Eh)
4Fh     Set Extended File Attributes                    (see AH=B6h"NetWare")
54h     Open Create File                                (see also AX=6C00h)
55h     Get Sparse File Data Block Bit Map
56h/xx  extended attribute services (OS/2)
56h/01h Close Extended Attribute Handle                 (see AX=F256h/SF=01h)
56h/02h Write Extended Attribute                        (see AX=F256h/SF=02h)
56h/03h Read Extended Attribute                         (see AX=F256h/SF=03h)
56h/04h Enumerate Extended Attributes                   (see AX=F256h/SF=04h)
56h/05h Duplicate Extended Attributes                   (see AX=F256h/SF=05h)
57h/01h Open/Create File or Subdirectory                (see AX=F257h/SF=01h)
57h/02h Initialize Search, continue with 57h/03h        (see AX=F257h/SF=02h)
57h/03h Scan NS Entry Info                              (see AX=F257h/SF=03h)
57h/04h Rename or Move File or Subdirectory             (see AX=F257h/SF=04h)
57h/05h Scan File or Subdirectory for Trustees          (see AX=F257h/SF=05h)
57h/06h Obtain File or Subdirectory Information         (see AX=F257h/SF=06h)
57h/07h Modify File or Subdirectory DOS Information     (see AX=F257h/SF=07h)
57h/08h Delete File/Directory                           (see AX=F257h/SF=08h)
57h/09h Set Short Directory Handle                      (see AX=F257h/SF=09h)
57h/0Ah Add Trustee Set                                 (see AX=F257h/SF=0Ah)
57h/0Bh Delete Trustee                                  (see AX=F257h/SF=0Bh)
57h/0Ch Allocate Short Directory Handle                 (see AX=F257h/SF=0Ch)
57h/10h Scan Salvageable Files                          (see AX=F257h/SF=10h)
57h/11h Recover Salvageable File                        (see AX=F257h/SF=11h)
57h/12h Purge Salvageable File                          (see AX=F257h/SF=12h)
57h/13h Get NS Information                              (see AX=F257h/SF=13h)
57h/15h Get Path String from Short Directory Handle     (see AX=F257h/SF=15h)
57h/16h Generate Directory Base and Volume Number       (see AX=F257h/SF=16h)
57h/17h Get Name Space Info                             (see AX=F257h/SF=17h)
57h/18h Get Name Spaces Loaded                          (see AX=F257h/SF=18h)
57h/19h Write Name Space Info                           (see AX=F257h/SF=19h)
57h/1Ah Read Extended Name Space Info                   (see AX=F257h/SF=1Ah)
57h/1Bh Write Extended Name Space Info                  (see AX=F257h/SF=1Bh)
57h/1Ch Get NS Full Path String                         (see AX=F257h/SF=1Ch)
57h/1Dh Get Effective Directory Rights                  (see AX=F257h/SF=1Dh)
58h/01h Get Volume Audit Statistics                     (see AX=F258h/SF=01h)
58h/02h Add Audit Property                              (see AX=F258h/SF=02h)
58h/03h Login as Volume Auditor                         (see AX=F258h/SF=03h)
58h/04h Change Auditor Password                         (see AX=F258h/SF=04h)
58h/05h Check Audit Access                              (see AX=F258h/SF=05h)
58h/06h Remove Audit Property                           (see AX=F258h/SF=06h)
58h/07h Disable Auditing on Volume                      (see AX=F258h/SF=07h)
58h/08h Enable Auditing on Volume                       (see AX=F258h/SF=08h)
58h/09h Is User Audited?                                (see AX=F258h/SF=09h)
58h/0Ah Read Auditing Bit Map                           (see AX=F258h/SF=0Ah)
58h/0Bh Read Audit Config Header                        (see AX=F258h/SF=0Bh)
58h/0Dh Logout as Volume Auditor                        (see AX=F258h/SF=0Dh)
58h/0Eh Reset Auditing File                             (see AX=F258h/SF=0Eh)
58h/0Fh Reset Audit History File                        (see AX=F258h/SF=0Fh)
58h/10h Write Auditing Bit Map                          (see AX=F258h/SF=10h)
58h/11h Write Audit Config Header                       (see AX=F258h/SF=11h)
58h/13h Get Auditing Flags                              (see AX=F258h/SF=13h)
58h/14h Close Old Auditing File                         (see AX=F258h/SF=14h)
58h/15h Delete Old Auditing File                        (see AX=F258h/SF=15h)
58h/16h Check Audit Level Two Access                    (see AX=F258h/SF=16h)
5Ah/01h Get DM (Data Migration) Info                    (see AX=F25Ah/SF=01h)
5Ah/80h Move File Data to DM                            (see AX=F25Ah/SF=80h)
5Ah/81h DM File Information                             (see AX=F25Ah/SF=81h)
5Ah/82h Volume DM Status                                (see AX=F25Ah/SF=82h)
5Ah/83h Get Migration or Status Information             (see AX=F25Ah/SF=83h)
5Ah/84h DM Support Module Information                   (see AX=F25Ah/SF=84h)
5Ah/85h Move File Data from DM                          (see AX=F25Ah/SF=85h)
5Ah/86h Get or Set Default Support Module               (see AX=F25Ah/SF=86h)
61h     Negotiate LIP Buffer, packet signing, and IPX checksums
65h     Packet Burst Connection
68h/xxh NetWare 4.x directory services (subfn at DS:[SI+11h])
68h/01h NDS resolve name                                (see AX=F268h/SF=01h)
68h/03h NDS read property
68h/04h NDS Get Bindery Context                         (see AX=F268h/SF=04h)
68h/05h NDS Monitor Connection                          (see AX=F268h/SF=05h)
68h/16h NDS List Partitions                             (see AX=F268h/SF=16h)
68h/35h NDS get server address                          (see AX=F268h/SF=35h)
68h/36h NDS set keys
68h/39h NDS begin login
68h/3Ah NDS finish login
68h/3Bh NDS begin authenticate
68h/3Ch NDS finish authenticate
68h/3Dh NDS Logout                                      (see AX=F268h/SF=3Dh)
68h/C8h Get DS Auditing Statistics                      (see AX=F268h/SF=C8h)
69h     Log File                                        (see AX=F269h)
6Ah     Lock File Set                                   (see AX=F26Ah)
6Bh     Log Logical Record      !!!APIREF09 line 1430
6Ch     Lock Logical Record Set                         (see AX=F26Ch)
6Dh     Log Physical Record
6Eh     Lock Physical Record Set                        (see AX=F26Eh)
6Fh/00h Open Semaphore                                  (see AX=F26Fh/SF=00h)
6Fh/01h Close Semaphore                                 (see AX=F26Fh/SF=01h)
6Fh/02h Wait on Semaphore                               (see AX=F26Fh/SF=02h)
6Fh/03h Signal Semaphore                                (see AX=F26Fh/SF=03h)
6Fh/04h Examine Semaphore                               (see AX=F26Fh/SF=04h)
72h     NetWare 4.x Time Services                       (see AX=F272h)
7Bh/01h Get Cache Information                           (see AX=F27Bh/SF=01h)
7Bh/02h Get File Server Information                     (see AX=F27Bh/SF=02h)
7Bh/03h Get NetWare File Systems Information
7Bh/04h Get User Information                            (see AX=F27Bh/SF=04h)
7Bh/05h Get Packet Burst Information
7Bh/06h Get IPX/SPX Information                         (see AX=F27Bh/SF=06h)
7Bh/07h Get Garbage Collection Information
7Bh/08h Get CPU Information                             (see AX=F27Bh/SF=08h)
7Bh/09h Get Volume Switch Information                   (see AX=F27Bh/SF=09h)
7Bh/0Ah Get NLM Loaded List                             (see AX=F27Bh/SF=0Ah)
7Bh/0Bh Get NLM Information                             (see AX=F27Bh/SF=0Bh)
7Bh/0Ch Get Directory Cache Information
7Bh/0Dh Get OS Version Information                      (see AX=F27Bh/SF=0Dh)
7Bh/0Eh Get Active Connection List by Type
7Bh/0Fh Get NLM's Resource Tag List
7Bh/14h Get Active LAN Board List                       (see AX=F27Bh/SF=14h)
7Bh/15h Get LAN Configuration Information               (see AX=F27Bh/SF=15h)
7Bh/16h Get LAN Common Counters Information             (see AX=F27Bh/SF=16h)
7Bh/17h Get LAN Custom Counters Information
7Bh/18h Get LAN Config Strings
7Bh/19h Get LSL Information
7Bh/1Ah Get LSL Logical Board Statistics
7Bh/1Eh Get Media Manager Object Information
7Bh/1Fh Get Media Manager Object List
7Bh/20h Get Media Manager Object Children List
7Bh/21h Get Volume Segment List
7Bh/28h Get Active Protocol Stacks
7Bh/29h Get Protocol Stack Configuration Information    (see AX=F27Bh/SF=29h)
7Bh/2Ah Get Protocol Stack Statistics Information
7Bh/2Bh Get Protocol Stack Custom Information
7Bh/2Ch Get Protocol Stack Numbers By Media Number
7Bh/2Dh Get Protocol Stack Numbers By LAN Board Number
7Bh/2Eh Get Media Name by Media Number
7Bh/2Fh Get Loaded Media Number List
7Bh/32h Get General Router and SAP Information
7Bh/33h Get Network Router Information                  (see AX=F27Bh/SF=33h)
7Bh/34h Get Network Routers Information
7Bh/35h Get Known Networks Information                  (see AX=F27Bh/SF=35h)
7Bh/36h Get Server Information
7Bh/38h Get Known Servers Information                   (see AX=F27Bh/SF=38h)
7Bh/3Ch Get Server Set Commands Information             (see AX=F27Bh/SF=3Ch)
7Bh/3Dh Get Server Set Categories                       (see AX=F27Bh/SF=3Dh)
Note:   the subfunction is stored at DS:SI for AL=56h,57h, DS:SI+2 for
          AL=15h-17h,23h
--------T-21F2-------------------------------
INT 21 - DoubleDOS - SEND CHARACTER TO KEYBOARD BUFFER OF OTHER JOB
        AH = F2h
        AL = character
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
            00h successful
            01h buffer full (128 characters)
SeeAlso: AH=E2h"DoubleDOS",AH=F1h"DoubleDOS",AH=F3h"DoubleDOS"
SeeAlso: AH=F8h"DoubleDOS"
--------N-21F203-----------------------------
INT 21 - Novell NetWare - LOG FILE (OLD)
        AX = F203h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02477 at AX=F269h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F204h,AX=F269h,AH=EBh"NetWare"
--------N-21F204-----------------------------
INT 21 - Novell NetWare - LOCK FILE SET (OLD)
        AX = F204h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02096)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F203h,AX=F26Ah,AH=CBh"NetWare"

Format of NetWare "Lock File Set (old)" request packet:
Offset  Size    Description     (Table 02096)
 00h    WORD    lock timeout in clock ticks (0000h = don't wait)
--------N-21F207-----------------------------
INT 21 - Novell NetWare - CLEAR FILE
        AX = F207h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02097)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=CEh,AH=EDh"NetWare",AH=F2h"NetWare",AX=F208h

Format of NetWare "Clear File" request packet:
Offset  Size    Description     (Table 02097)
 00h    BYTE    directory handle
 01h    BYTE    length of filename
 02h  N BYTEs   filename
SeeAlso: #02098
--------N-21F208-----------------------------
INT 21 - Novell NetWare - CLEAR FILE SET
        AX = F208h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02098)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=CFh"NetWare",AH=F2h"NetWare",AX=F207h

Format of NetWare "Clear File Set" request packet:
Offset  Size    Description     (Table 02098)
 00h    BYTE    lock flag (nonzero to lock)
SeeAlso: #02097
--------N-21F20A-----------------------------
INT 21 - Novell NetWare - LOCK LOGICAL RECORD SET (OLD)
        AX = F20Ah
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02479 at AX=F26Ch)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F204h,AX=F26Ch,AH=D1h"NetWare"
--------N-21F20B-----------------------------
INT 21 - Novell NetWare - CLEAR LOGICAL RECORD
        AX = F20Bh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02099)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=D4h"NetWare",AH=F2h"NetWare",AX=F207h,AX=F20Eh

Format of NetWare "Clear Logical Record" request packet:
Offset  Size    Description     (Table 02099)
 00h    BYTE    length of record name (max 128)
 01h  N BYTEs   logical record name
SeeAlso: #02100
--------N-21F20E-----------------------------
INT 21 - Novell NetWare - CLEAR LOGICAL RECORD SET
        AX = F20Eh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02100)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=D5h"NetWare",AH=F2h"NetWare",AX=F207h,AX=F20Bh

Format of NetWare "Clear Logical Record Set" request packet:
Offset  Size    Description     (Table 02100)
 00h    BYTE    lock flag
SeeAlso: #02099
--------N-21F211SF06-------------------------
INT 21 - Novell NetWare - GET PRINTER STATUS
        AX = F211h subfn 06h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02101)
        ES:DI -> reply buffer (see #02102)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=E0h"NetWare",AH=F2h"Novell",AX=F211h/SF=0Ah

Format of NetWare "Get Printer Status" request packet:
Offset  Size    Description     (Table 02101)
 00h    WORD    length of following data
 02h    BYTE    06h (subfunction "Get Printer Status")
 03h    BYTE    target printer number (00h-04h)
SeeAlso: #02102,#01814

Format of NetWare "Get Printer Status" reply packet:
Offset  Size    Description     (Table 02102)
 00h    BYTE    flag: printer halted if FFh
 01h    BYTE    flag: printer off-line if FFh
 02h    BYTE    current form type
 03h    BYTE    redirected printer number
SeeAlso: #02101
--------N-21F211SF0A-------------------------
INT 21 - Novell NetWare - GET PRINTER QUEUE
        AX = F211h subfn 0Ah
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02103)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F211h/SF=06h

Format of NetWare "Get Printer Queue" request packet:
Offset  Size    Description     (Table 02103)
 00h    WORD    length of following data
 02h    BYTE    0Ah (subfunction "Get Printer Queue")
        ???
--------N-21F212-----------------------------
INT 21 - Novell NetWare - GET VOLUME INFO WITH NUMBER
        AX = F212h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02104)
        ES:DI -> reply buffer (see #02105)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=15h,AX=F217h/SF=E9h

Format of NetWare "Get Volume Info with Number" request packet:
Offset  Size    Description     (Table 02104)
 00h    BYTE    volume number
SeeAlso: #02105

Format of NetWare "Get Volume Info with Number" reply packet:
Offset  Size    Description     (Table 02105)
 00h    WORD    sectors per cluster
 02h    WORD    total clusters in volume
 04h    WORD    free clusters
 06h    WORD    total directory entries for volume (FFFFh if not relevant)
 08h    WORD    available directory entries (FFFFh if not relevant)
 0Ah 16 BYTEs   volume name
 1Ah    WORD    removability
                0000h fixed media
                FFFFh removable
SeeAlso: #02104
--------N-21F214CX0000-----------------------
INT 21 - Novell NetWare - GET FILE SERVER DATE AND TIME
        AX = F214h
        CX = 0000h (no request packet)
        DX = length of reply packet in bytes
        ES:DI -> buffer for reply packet (see #02106)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"NetWare",AH=E3h/SF=CAh,AH=E7h"NetWare"

Format of NetWare "Get File Server Date and Time" reply packet:
Offset  Size    Description     (Table 02106)
 00h    BYTE    year-1900 (80-179)
 01h    BYTE    month (1-12)
 02h    BYTE    day (1-31)
 03h    BYTE    hour
 04h    BYTE    minute
 05h    BYTE    second
 06h    BYTE    day of week
SeeAlso: #02012 at AH=E3h/SF=CAh,#02087 at AH=E7h
--------N-21F215SF01-------------------------
INT 21 - Novell NetWare - GET BROADCAST MESSAGE (OLD)
        AX = F215h subfn 01h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #01822 at AH=E1h/SF=01h)
        ES:DI -> reply buffer (see #02107)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E1h/SF=01h,AX=F215h/SF=02h,AX=F215h/SF=0Bh

Format of NetWare "Get Broadcast Message (Old)" reply packet:
Offset  Size    Description     (Table 02107)
 00h    BYTE    length of message (00h-37h)
                00h if no broadcast messages pending
 01h  N BYTEs   message (no control characters or characters > 7Eh)
SeeAlso: #01821,#01822
--------N-21F215SF02-------------------------
INT 21 - Novell NetWare - DISABLE BROADCASTS
        AX = F215h subfn 02h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01823 at AH=E1h/SF=02h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E1h/SF=02h,AX=F215h/SF=01h,AX=F215h/SF=03h
--------N-21F215SF03-------------------------
INT 21 - Novell NetWare - ENABLE BROADCASTS
        AX = F215h subfn 03h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01824 at AH=E1h/SF=03h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E1h/SF=03h,AX=F215h/SF=01h,AX=F215h/SF=02h
--------N-21F215SF08-------------------------
INT 21 - Novell NetWare - CHECK PIPE STATUS
        AX = F215h subfn 08h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #01835 at AH=E1h/SF=08h)
        ES:DI -> reply buffer (see #02108)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E1h/SF=08h,AX=F215h/SF=09h

Format of NetWare "Check Pipe Status" reply packet:
Offset  Size    Description     (Table 02108)
 00h    BYTE    number of connections
 01h  N BYTEs   list of pipe statuses
                00h open
                FEh incomplete
                FFh closed
SeeAlso: #01835,#01836
--------N-21F215SF09-------------------------
INT 21 - Novell NetWare - BROADCAST TO CONSOLE
        AX = F215h subfn 09h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01837 at AH=E1h/SF=09h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
Note:   requires Access Control rights to the target directory or its parent
SeeAlso: AH=E1h/SF=09h,AH=F2h"NetWare",AX=F215h/SF=08h
--------N-21F215SF0B-------------------------
INT 21 - Novell NetWare - GET BROADCAST MESSAGE
        AX = F215h subfn 0Bh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02109)
        ES:DI -> reply buffer (see #02110)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E1h/SF=01h,AX=F215h/SF=01h

Format of NetWare "Get Broadcast Message" request packet:
Offset  Size    Description     (Table 02109)
 00h    WORD    length of following data
 02h    BYTE    0Bh (subfunction "Get Broadcast Message")
SeeAlso: #02110,#01821

Format of NetWare "Get Broadcast Message" reply packet:
Offset  Size    Description     (Table 02110)
 00h    BYTE    length of message
 01h  N BYTEs   message
SeeAlso: #02109,#01822
--------N-21F216SF00-------------------------
INT 21 - Novell NetWare - SET DIRECTORY HANDLE
        AX = F216h subfn 00h
        CX = length of request buffer in bytes
        DX = 0000h (no reply buffer)
        DS:SI -> request buffer (see #01840 at AH=E2h/SF=00h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=00h,AX=F216h/SF=01h
--------N-21F216SF01-------------------------
INT 21 - Novell NetWare - GET DIRECTORY PATH
        AX = F216h subfn 01h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #01842 at AH=E2h/SF=01h)
        ES:DI -> reply buffer (see #01843)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=01h,AX=F216h/SF=00h
--------N-21F216SF02-------------------------
INT 21 - Novell NetWare - SCAN DIRECTORY INFORMATION
        AX = F216h subfn 02h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #01844 at AH=E2h/SF=02h)
        ES:DI -> reply buffer (see #02111)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=02h,AX=F216h/SF=01h,AX=F216h/SF=03h

Format of NetWare "Scan Directory Information" reply packet:
Offset  Size    Description     (Table 02111)
 00h 16 BYTEs   subdirectory name
 10h    DWORD   (big-endian) date and time of creation (see #01846)
 14h    DWORD   (big-endian) object ID of owner
 18h    BYTE    maximum directory rights (see #01849)
 19h    BYTE    unused
 1Ah    WORD    (big-endian) subdirectory number
SeeAlso: #01844,#01845 at AH=E2h/SF=02h
--------N-21F216SF03-------------------------
INT 21 - Novell NetWare - GET EFFECTIVE DIRECTORY RIGHTS (OLD)
        AX = F216h subfn 03h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #01847 at AH=E2h/SF=03h)
        ES:DI -> reply buffer (see #02112)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=E2h/SF=03h,AX=F216h/SF=02h,AX=F216h/SF=04h,AX=F257h/SF=1Dh

Format of NetWare "Get Effective Directory Rights (old)" reply buffer:
Offset  Size    Description     (Table 02112)
 00h    BYTE    effective directory rights (see #01849 at AH=E2h/SF=03h)
SeeAlso: #01847,#01848 at AH=E2h/SF=03h
--------N-21F216SF04-------------------------
INT 21 - Novell NetWare - MODIFY MAXIMUM RIGHTS MASK
        AX = F216h subfn 04h
        CX = length of request buffer in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01850 at AH=E2h/SF=04h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=04h,AX=F216h/SF=03h,AX=F216h/SF=05h
--------N-21F216SF05-------------------------
INT 21 - Novell NetWare - GET VOLUME NUMBER
        AX = F216h subfn 05h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #01852 at AH=E2h/SF=05h)
        ES:DI -> reply buffer (see #02113)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=05h,AX=F216h/SF=02h,AX=F216h/SF=06h

Format of NetWare "Get Volume Number" reply packet:
Offset  Size    Description     (Table 02113)
 00h    BYTE    volume number
SeeAlso: #01852 at AH=E2h/SF=05h
--------N-21F216SF06-------------------------
INT 21 - Novell NetWare - GET VOLUME NAME
        AX = F216h subfn 06h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #01854 at AH=E2h/SF=06h)
        ES:DI -> reply buffer (see #02114)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=06h,AX=F216h/SF=05h,AX=F216h/SF=0Ah

Format of NetWare "Get Volume Name" reply packet:
Offset  Size    Description     (Table 02114)
SeeAlso: #01854,#01855 at AH=E2h/SF=06h
--------N-21F216SF0A-------------------------
INT 21 - Novell NetWare - CREATE DIRECTORY
        AX = F216h subfn 0Ah
        CX = length of request buffer in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01856 at AH=E2h/SF=0Ah)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=39h,AH=F2h"Novell",AH=E2h/SF=0Ah,AX=F216h/SF=0Bh
--------N-21F216SF0B-------------------------
INT 21 - Novell NetWare - DELETE DIRECTORY
        AX = F216h subfn 0Bh
        CX = length of request buffer in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01858 at AH=E2h/SF=0Bh)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=3Ah,AH=F2h"Novell",AH=E2h/SF=0Bh,AX=F216h/SF=0Ah
--------N-21F216SF0C-------------------------
INT 21 - Novell NetWare - SCAN DIRECTORY FOR TRUSTEES
        AX = F216h subfn 0Ch
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #01859 at AH=E2h/SF=0Ch)
        ES:DI -> reply buffer (see #02115)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=0Ch,AX=F216h/SF=0Dh

Format of NetWare "Scan Directory For Trustees" reply packet:
Offset  Size    Description     (Table 02115)
 02h 16 BYTEs   directory name
 12h  4 BYTEs   date and time of creation
 16h    DWORD   (big-endian) object ID of owner
 1Ah  5 DWORDs  (big-endian) object IDs of Trustees 0 through 4
                00000000h = end of group
 2Eh  5 BYTEs   directory rights for Trustees 0 through 4 (see #01849)
SeeAlso: #01859 at AH=E2h/SF=0Ch
--------N-21F216SF0D-------------------------
INT 21 - Novell NetWare - ADD TRUSTEE TO DIRECTORY
        AX = F216h subfn 0Dh
        CX = length of request buffer in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01861 at AH=E2h/SF=0Dh)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
Note:   requires Access Control rights to the target directory or its parent
SeeAlso: AH=F2h"NetWare",AH=E2h/SF=0Dh,AX=F216h/SF=0Ch,AX=F216h/SF=0Eh
--------N-21F216SF0E-------------------------
INT 21 - Novell NetWare - DELETE TRUSTEE FROM DIRECTORY
        AX = F216h subfn 0Eh
        CX = length of request buffer in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01862 at AH=E2h/SF=0Eh)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=0Eh,AX=F216h/SF=0Ch,AX=F216h/SF=0Dh
--------N-21F216SF0F-------------------------
INT 21 - Novell NetWare - RENAME DIRECTORY
        AX = F216h subfn 0Fh
        CX = length of request buffer in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01864 at AH=E2h/SF=0Fh)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=0Fh,AX=F216h/SF=0Ah
--------N-21F216SF10-------------------------
INT 21 - Novell NetWare - PURGE ERASED FILES (OLD)
        AX = F216h subfn 10h
        CX = length of request buffer in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01865 at AH=E2h/SF=10h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=10h,AX=F216h/SF=11h
--------N-21F216SF11-------------------------
INT 21 - Novell NetWare - RECOVER ERASED FILE (OLD)
        AX = F216h subfn 11h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01867 at AH=E2h/SF=11h)
        ES:DI -> reply buffer (see #02116)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=11h,AX=F216h/SF=10h

Format of NetWare "Recover Erased File (Old)" reply packet:
Offset  Size    Description     (Table 02116)
 02h 15 BYTEs   ASCIZ name of erased file
 11h 15 BYTEs   ASCIZ name under which file was restored
SeeAlso: #01867,#01868 at AH=E2h/SF=11h
--------N-21F216SF12-------------------------
INT 21 - Novell NetWare - ALLOCATE PERMANENT DIRECTORY HANDLE
        AX = F216h subfn 12h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01869 at AH=E2h/SF=12h)
        ES:DI -> reply buffer (see #02118)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=16h,AH=E2h/SF=12h

Format of NetWare IPX fragment list entry:
Offset  Size    Description     (Table 02117)
 00h    DWORD   -> fragment data
 04h    WORD    size of fragment in bytes

Format of NetWare "Allocate Permanent Directory Handle" reply packet:
Offset  Size    Description     (Table 02118)
 00h    BYTE    new directory handle
 01h    BYTE    access rights
SeeAlso: #01869,#01873,#02117
--------N-21F216SF13-------------------------
INT 21 - Novell NetWare - ALLOCATE TEMPORARY DIRECTORY HANDLE
        AX = F216h subfn 13h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01871 at AH=E2h/SF=13h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=12h,AX=F216h/SF=16h,AH=E2h/SF=13h
--------N-21F216SF14-------------------------
INT 21 - Novell NetWare - DEALLOCATE DIRECTORY HANDLE
        AX = F216h subfn 14h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01872 at AH=E2h/SF=14h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=14h,AX=F216h/SF=13h,AX=F216h/SF=16h
--------N-21F216SF15-------------------------
INT 21 - Novell NetWare - GET VOLUME INFO WITH HANDLE
        AX = F216h subfn 15h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01874 at AH=E2h/SF=15h)
        ES:DI -> reply buffer (see #02119)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=15h,AX=F212h,AX=F216h/SF=13h

Format of NetWare "Get Volume Info With Handle" reply packet:
Offset  Size    Description     (Table 02119)
 00h    WORD    (big-endian) sectors per block
 02h    WORD    (big-endian) total blocks on volume
 04h    WORD    (big-endian) blocks available on volume
 06h    WORD    (big-endian) total directory slots
 08h    WORD    (big-endian) directory slots available
 0Ah 16 BYTEs   NUL-padded volume name
 1Ah    WORD    (big-endian) flag: volume removable if nonzero
SeeAlso: #01874 at AH=E2h/SF=15h
--------N-21F216SF16-------------------------
INT 21 - Novell NetWare v2+ - ALLOCATE SPECIAL TEMPORARY DIRECTORY HANDLE
        AX = F216h subfn 16h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01876 at AH=E2h/SF=16h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=12h,AX=F216h/SF=13h,AH=E2h/SF=16h
--------N-21F216SF17-------------------------
INT 21 - Novell NetWare - SAVE DIRECTORY HANDLE
        AX = F216h subfn 17h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01877 at AH=E2h/SF=17h)
        ES:DI -> reply buffer (see #02120)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=17h,AX=F216h/SF=18h

Format of NetWare "Save Directory Handle" reply packet:
Offset  Size    Description     (Table 02120)
 00h 16 BYTEs   save buffer
SeeAlso: #01877,#01878,#02121
--------N-21F216SF18-------------------------
INT 21 - Novell NetWare - RESTORE DIRECTORY HANDLE
        AX = F216h subfn 18h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01879 at AH=E2h/SF=18h)
        ES:DI -> reply buffer (see #02121)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=18h,AX=F216h/SF=17h

Format of NetWare "Restore Directory Handle" reply packet:
Offset  Size    Description     (Table 02121)
 00h    BYTE    new directory handle
 01h    BYTE    effective rights (see #01849)
SeeAlso: #01880,#02120
--------N-21F216SF19-------------------------
INT 21 - Novell NetWare - SET DIRECTORY INFORMATION
        AX = F216h subfn 19h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01881 at AH=E2h/SF=19h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=19h,AX=F216h/SF=17h
--------N-21F216SF1A-------------------------
INT 21 - Novell NetWare - GET PATH NAME OF VOLUME-DIRECTORY NUMBER PAIR
        AX = F216h subfn 1Ah
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01883 at AH=E2h/SF=1Ah)
        ES:DI -> reply buffer (see #02122)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=1Ah,AX=F216h/SF=0Eh

Format of NetWare "Get Path Name Of Volume-Dir Number Pair" reply packet:
Offset  Size    Description     (Table 02122)
 00h 256 BYTEs  path
SeeAlso: #01883,#01884 at AH=E2h/SF=1Ah
--------N-21F216SF1B-------------------------
INT 21 - Novell NetWare - SCAN SALVAGEABLE FILES (OLD)
        AX = F216h subfn 1Bh
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02123)
        ES:DI -> reply buffer (see #02124)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=1Ch,AX=F216h/SF=1Dh,AX=F257h/SF=10h

Format of NetWare "Scan Salvageable Files (Old)" request packet:
Offset  Size    Description     (Table 02123)
 00h    WORD    length of following data
 02h    BYTE    1Bh (subfunction "Scan Salvageable Files (Old)")
 03h    BYTE    directory handle
 04h    DWORD   last sequence number (set to FFFFFFFFh before first call)
SeeAlso: #02124,#02399

Format of NetWare "Scan Salvageable Files (Old)" reply packet:
Offset  Size    Description     (Table 02124)
 00h    DWORD   next sequence number
 04h    WORD    subdirectory
 06h    DWORD   attributes
 0Ah    BYTE    unique ID
 0Bh    BYTE    flags
 0Ch    BYTE    name space
 0Dh    BYTE    length of filename
 0Eh 14 BYTEs   filename
 1Ah    DWORD   creation date and time
 1Eh    DWORD   owner ID
 22h    DWORD   last-backup date and time
 26h    DWORD   last-backup ID
 2Ah    DWORD   last-modified date and time
 2Eh    WORD    ???
 30h    DWORD   last-modified ID
 34h    DWORD   file size
 38h 44 BYTEs   reserved
 62h    WORD    inherited rights mask
 64h    WORD    last-access date
 66h    DWORD   deleted file's time
 6Ah    DWORD   deletion date and time
 6Eh    DWORD   ID of deletor
 72h 16 BYTEs   reserved
SeeAlso: #02123,#02400
--------N-21F216SF1C-------------------------
INT 21 - Novell NetWare - RECOVER SALVAGEABLE FILE (OLD)
        AX = F216h subfn 1Ch
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02125)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=1Bh,AX=F216h/SF=1Dh,AX=F257h/SF=11h

Format of NetWare "Recover Salvageable File (Old)" request packet:
Offset  Size    Description     (Table 02125)
 00h    WORD    length of following data
 02h    BYTE    1Ch (subfunction "Recover Salvageable File (Old)")
 03h    BYTE    directory handle
 04h    DWORD   sequence number (set to ? before first call)
 08h    BYTE    length of filename
 09h  N BYTEs   filename in DOS format
        BYTE    length of new name for recovered file
      N BYTEs   recovered filename in NetWare VOLUME:DIRECTORY/.../FILE format
SeeAlso: #02401
--------N-21F216SF1D-------------------------
INT 21 - Novell NetWare - PURGE SALVAGEABLE FILE (OLD)
        AX = F216h subfn 1Dh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02126)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=1Bh,AX=F216h/SF=1Ch,AX=F257h/SF=12h

Format of NetWare "Purge Salvageable File (old)" request packet:
Offset  Size    Description     (Table 02126)
 00h    WORD    length of following data
 02h    BYTE    1Dh (subfunction "Purge Salvageable File (Old)")
 03h    BYTE    directory handle
 04h    DWORD   directory entry
 08h    DWORD   sequence number from Scan Salvageable Files
--------N-21F216SF1E-------------------------
INT 21 - Novell NetWare - SCAN A DIRECTORY
        AX = F216h subfn 1Eh
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02127)
        ES:DI -> reply buffer (see #02128)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E2h/SF=02h,AX=F216h/SF=1Fh

Format of NetWare "Scan A Directory" request packet:
Offset  Size    Description     (Table 02127)
 00h    WORD    length of following data
 02h    BYTE    1Eh (subfunction "Scan A Directory")
 03h    BYTE    directory handle
 04h    BYTE    search attributes
 05h    DWORD   sequence number
 09h    BYTE    length of search filespec
 0Ah  N BYTEs   search filespec
SeeAlso: #02128

Format of NetWare "Scan A Directory" reply packet:
Offset  Size    Description     (Table 02128)
 00h    DWORD   sequence number (copy into next request packet)
 04h    DWORD   subdirectory
 08h    DWORD   attributes
 0Ch    BYTE    unique ID
 0Dh    BYTE    flags
 0Eh    BYTE    name space
 0Fh    BYTE    length of filename
---DOS file---
 10h 12 BYTEs   DOS filename
 1Ch    DWORD   creation date and time
 20h    DWORD   owner ID
 24h    DWORD   last-archived date and time
 28h    DWORD   last-archived ID
 2Ch    DWORD   last-updated date and time
 30h    DWORD   last-updated ID
 34h    DWORD   file size
 38h 44 BYTEs   reserved
 64h    WORD    inherited rights mask
 66h    WORD    last-accessed date
 68h 28 BYTEs   reserved
---DOS subdirectory---
 10h 12 BYTEs   DOS directory name
 1Ch    DWORD   creation date and time
 20h    DWORD   owner ID
 24h    DWORD   last-archived date and time
 28h    DWORD   last-archived ID
 2Ch    DWORD   last-updated date and time
 30h    DWORD   next trustee entry
 34h 48 BYTEs   reserved
 64h    DWORD   maximum space
 68h    WORD    inherited rights mask
 6Ah 26 BYTEs   unused
SeeAlso: #02127
--------N-21F216SF1F-------------------------
INT 21 - Novell NetWare - GET DIRECTORY ENTRY
        AX = F216h subfn 1Fh
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02129)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=1Eh

Format of NetWare "Get Directory Entry" request packet:
Offset  Size    Description     (Table 02129)
 00h    WORD    length of following data
 02h    BYTE    1Fh (subfunction "Get Directory Entry")
        ???
--------N-21F216SF20-------------------------
INT 21 - Novell NetWare - SCAN VOLUME'S USER DISK RESTRICTIONS
        AX = F216h subfn 20h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02130)
        ES:DI -> reply buffer (see #02131)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=23h,AX=F216h/SF=29h

Format of NetWare "Scan Volume's User Disk Restrictions" request packet:
Offset  Size    Description     (Table 02130)
 00h    WORD    length of following data
 02h    BYTE    20h (subfunction "Scan Volume's User Disk Restrictions")
 03h    BYTE    volume number
 04h    DWORD   sequence number (set to 00000000h before first call)
SeeAlso: #02131

Format of NetWare "Scan Volume's User Disk Restrictions" reply packet:
Offset  Size    Description     (Table 02131)
 00h    BYTE    number of entries returned (max 12)
 01h 2N DWORDs  restriction entries [array]
                Offset  Size    Description
                 00h    DWORD   object ID
                 04h    DWORD   maximum usage allowed (in 4K blocks)
SeeAlso: #02130
--------N-21F216SF21-------------------------
INT 21 - Novell NetWare v3+ - ADD USER DISK SPACE RESTRICTION
        AX = F216h subfn 21h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02132)
        ES:DI -> reply buffer (ignored)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AX=F216h/SF=20h,AX=F216h/SF=22h,AX=F216h/SF=24h

Format of NetWare "Add User Disk Space Restriction" request buffer:
Offset  Size    Description     (Table 02132)
 00h    WORD    000Ah (length of following data)
 02h    BYTE    21h (subfunction "Add User Disk Space Restriction")
 03h    BYTE    volume number
 04h    DWORD   (big-endian) object ID
 08h    DWORD   (big-endian) disk space limit in 4K blocks
                00000000h to 40000000h
--------N-21F216SF22-------------------------
INT 21 - Novell NetWare - REMOVE USER DISK SPACE RESTRICTIONS
        AX = F216h subfn 22h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02133)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=20h,AX=F216h/SF=21h,AX=F216h/SF=23h

Format of NetWare "Remove User Disk Space Restrictions" request packet:
Offset  Size    Description     (Table 02133)
 00h    WORD    length of following data
 02h    BYTE    22h (subfunction "Remove User Disk Space Restrictions")
        ???
--------N-21F216SF23-------------------------
INT 21 - Novell NetWare - SCAN DIRECTORY SPACE RESTRICTIONS
        AX = F216h subfn 23h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02134)
        ES:DI -> reply buffer (see #02135)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=20h,AX=F216h/SF=21h,AX=F216h/SF=22h

Format of NetWare "Scan Directory Space Restrictions" request packet:
Offset  Size    Description     (Table 02134)
 00h    WORD    length of following data
 02h    BYTE    23h (subfunction "Scan Directory Space Restrictions")
 03h    BYTE    directory handle
SeeAlso: #02135

Format of NetWare "Scan Directory Space Restrictions" reply packet:
Offset  Size    Description     (Table 02135)
 00h    BYTE    number of entries returned
 01h 10N BYTEs  restrictions [array]
                Offset  Size    Description
                 00h    WORD    depth of directory from root
                 02h    DWORD   maximum space allowed for files in directory
                 04h    DWORD   current space used by files in directory
SeeAlso: #02134
--------N-21F216SF24-------------------------
INT 21 - Novell NetWare v3+ - SET DIRECTORY DISK SPACE RESTRICTION
        AX = F216h subfn 24h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02136)
        ES:DI -> reply buffer (ignored)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AX=F216h/SF=21h,AX=F216h/SF=22h,AX=F216h/SF=23h,AX=F216h/SF=25h

Format of NetWare "Set Directory Disk Space Restriction" request buffer:
Offset  Size    Description     (Table 02136)
 00h    WORD    0006h (length of following data)
 02h    BYTE    24h (subfunction "Set Directory Disk Space Restriction")
 03h    BYTE    directory handle
 04h    DWORD   (big-endian) disk space limit in 4K blocks
                00000000h to remove restriction, negative to set to 0 blocks
--------N-21F216SF25-------------------------
INT 21 - Novell NetWare - SET DIRECTORY/FILE INFORMATION
        AX = F216h subfn 25h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02137)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=02h

Format of NetWare "Set Directory/File Information" request packet:
Offset  Size    Description     (Table 02137)
 00h    WORD    length of following data
 02h    BYTE    25h (subfunction "Set Directory/File Information")
 03h    BYTE    directory handle
 04h    BYTE    search attributes
 05h    DWORD   sequence number
 09h    DWORD   change bits
 0Dh    DWORD   directory number
 11h    DWORD   attributes
 15h    BYTE    unique ID
 16h    BYTE    flags
 17h    BYTE    name space (see #02387)
 18h    BYTE    length of directory/file name
 19h 12 BYTEs   directory/file name
 25h    DWORD   creation date and time
 29h    DWORD   (big-endian) owner ID
 2Dh    DWORD   last-backup date and time
 31h    DWORD   (big-endian) last-backup ID
 35h    DWORD   last-modification date and time
 39h    DWORD   (big-endian) last-modification ID
 3Dh    DWORD   file size
 41h    DWORD   data fork first FAT
 45h    DWORD   next trustee entry
 49h 36 BYTEs   reserved
 6Dh    WORD    inherited rights mask
 6Fh    WORD    last-access date
 71h 20 BYTEs   reserved
 85h    DWORD   primary entry
 89h    DWORD   name list
--------N-21F216SF26-------------------------
INT 21 - Novell NetWare v3+ - SCAN FILE OR DIRECTORY FOR EXTENDED TRUSTEES
        AX = F216h subfn 26h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02138)
        ES:DI -> reply buffer (see #02139)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
Desc:   get up to 20 extended trustee entries per call for a file or directory

Format of NetWare "Scan File/Directory for Extended Trustees" request buffer:
Offset  Size    Description     (Table 02138)
 00h    WORD    length of following data
 02h    BYTE    26h (subfunc "Scan File or Directory For Extended Trustees")
 03h    BYTE    directory handle
 04h    BYTE    sequence number
                00h for first call, increment by number of returned entries
 05h    BYTE    length of path
 06h  N BYTEs   pathname
SeeAlso: #02138

Format of NetWare "Scan File/Directory for Extended Trustees" reply buffer:
Offset  Size    Description     (Table 02139)
 00h    BYTE    number of entries returned (max 20)
 01h 20 DWORDs  (big-endian) list of object IDs
 51h 20 WORDs   list of associated trustee rights
SeeAlso: #02139
--------N-21F216SF27-------------------------
INT 21 - Novell NetWare v3+ - ADD EXTENDED TRUSTEE TO DIRECTORY OR FILE
        AX = F216h subfn 27h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02140)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)

Format of NetWare "Add Extended Trustee to Directory or File" request buffer:
Offset  Size    Description     (Table 02140)
 00h    WORD    length of following data
 02h    BYTE    27h (subfunction "Add Extended Trustee to Directory or File")
 03h    BYTE    directory handle
 04h    DWORD   (big-endian) object ID
 08h    WORD    trustee rights (see #02141)
 0Ah    BYTE    path length
 0Bh  N BYTEs   path name

Bitfields for NetWare trustee rights:
Bit(s)  Description     (Table 02141)
 0      read
 1      write
 3      create
 4      delete
 5      access
 6      file
 7      modify
 8      supervisor
--------N-21F216SF28-------------------------
INT 21 - Novell NetWare - SCAN DIRECTORY DISK SPACE
        AX = F216h subfn 28h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02142)
        ES:DI -> reply buffer (see #02143)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=02h,AX=F216h/SF=20h

Format of NetWare "Scan Directory Disk Space" request packet:
Offset  Size    Description     (Table 02142)
 00h    WORD    length of following data
 02h    BYTE    28h (subfunction "Scan Directory Disk Space")
 03h    BYTE    directory handle
 04h    BYTE    search attributes
 05h    DWORD   sequence number (set to FFFFFFFFh before first call)
 09h    BYTE    length of filespec
 0Ah  N BYTEs   search filespec
SeeAlso: #02143

Format of NetWare "Scan Directory Disk Space" reply packet:
Offset  Size    Description     (Table 02143)
 00h    DWORD   next sequence number
 04h    DWORD   (big-endian) subdirectory number
 08h    DWORD   (big-endian) attributes
 0Ch    BYTE    unique ID
 0Dh    BYTE    flags
 0Eh    BYTE    name space (see #02387)
 0Fh    BYTE    length of name
 10h 12 BYTEs   name
 1Ch    DWORD   creation date and time
 20h    DWORD   owner ID
 24h    DWORD   date and time last backed up
 28h    DWORD   last-backup ID
 2Ch    DWORD   date and time last modified
 30h    DWORD   last-modification ID
 34h    DWORD   data fork size
 38h    DWORD   data fork first FAT
 3Ch    DWORD   next trustee entry
 40h 36 BYTEs   reserved
 64h    WORD    inherited rights mask
 66h    WORD    last-access date
 68h    DWORD   deleted file date and time
 6Ch    DWORD   date and time file was deleted
 70h    DWORD   deleted ID
 74h  8 BYTEs   undefined
 7Ch    DWORD   primary entry
 80h    DWORD   name list
 84h    DWORD   other file fork size
SeeAlso: #02142
--------N-21F216SF29-------------------------
INT 21 - Novell NetWare v3+ - GET OBJECT DISK USAGE AND RESTRICTIONS
        AX = F216h subfn 29h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02144)
        ES:DI -> reply buffer (see #02145)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
Note:   this function returns successfully, showing no restriction, if an
          invalid object ID is specified
SeeAlso: AX=F216h/SF=24h,AX=F216h/SF=33h

Format of NetWare "Get Object Disk Restrictions" request buffer:
Offset  Size    Description     (Table 02144)
 00h    WORD    0006h (length of following data)
 02h    BYTE    21h (subfunction "Get Object Disk Restrictions")
 03h    BYTE    volume number
 04h    DWORD   (big-endian) object ID
SeeAlso: #02145

Format of NetWare "Get Object Disk Restrictions" reply buffer:
Offset  Size    Description     (Table 02145)
 00h    DWORD   disk space limit
 04h    DWORD   disk space currently in use by object
SeeAlso: #02144
--------N-21F216SF2A-------------------------
INT 21 - Novell NetWare - GET EFFECTIVE RIGHTS
        AX = F216h subfn 2Ah
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02146)
        ES:DI -> reply buffer (see #02147)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=32h

Format of NetWare "Get Effective Rights" request packet:
Offset  Size    Description     (Table 02146)
 00h    WORD    length of following data
 02h    BYTE    2Ah (subfunction "Get Effective Rights")
        ???
--------N-21F216SF2B-------------------------
INT 21 - Novell NetWare - REMOVE EXTENDED TRUSTEE FROM DIR OR FILE
        AX = F216h subfn 2Bh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02117,#02147)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=26h,AX=F216h/SF=27h

Format of NetWare "Remove Extended Trustee From Dir Or File" request packet:
Offset  Size    Description     (Table 02147)
 00h    WORD    length of following data
 02h    BYTE    2Bh (subfunction "Remove Extended Trustee From Dir Or File")
 03h    BYTE    directory handle
 04h    DWORD   trustee's object ID
 08h    BYTE    unused
 09h    BYTE    length of pathname
 0Ah  N BYTEs   directory path in form VOLUME:DIRECTORY/.../DIRECTORY
--------N-21F216SF2C-------------------------
INT 21 - Novell NetWare - GET VOLUME USAGE
        AX = F216h subfn 2Ch
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02148)
        ES:DI -> reply buffer (see #02149)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=20h,AX=F216h/SF=29h

Format of NetWare "Get Volume Usage" request packet:
Offset  Size    Description     (Table 02148)
 00h    WORD    length of following data
 02h    BYTE    2Ch (subfunction "Get Volume Usage")
        ???
--------N-21F216SF2D-------------------------
INT 21 - Novell NetWare - GET DIRECTORY INFORMATION
        AX = F216h subfn 2Dh
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02149)
        ES:DI -> reply buffer (see #02150)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=2Ch,AX=F216h/SF=2Eh

Format of NetWare "Get Directory Information" request packet:
Offset  Size    Description     (Table 02149)
 00h    WORD    length of following data
 02h    BYTE    2Dh (subfunction "Get Directory Information")
 03h    BYTE    directory handle
SeeAlso: #02150

Format of NetWare "Get Directory Information" reply packet:
Offset  Size    Description     (Table 02150)
 00h    DWORD   total blocks
 04h    DWORD   available blocks
 08h    DWORD   total number of directory entries
 0Ch    DWORD   number of available directory entries
 10h  4 BYTEs   reserved
 14h    BYTE    sectors per block
 15h    BYTE    length of volume name
 16h  N BYTEs   volume name
SeeAlso: #02149
--------N-21F216SF2E-------------------------
INT 21 - Novell NetWare - RENAME OR MOVE
        AX = F216h subfn 2Eh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02151)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=34h,AX=F223h/SF=07h,AX=F244h

Format of NetWare "Rename Or Move" request packet:
Offset  Size    Description     (Table 02151)
 00h    WORD    length of following data
 02h    BYTE    2Eh (subfunction "Rename Or Move")
 03h    BYTE    source directory handle
 04h    BYTE    search attributes
 05h    BYTE    source path component count
 06h  N BYTEs   source path
        BYTE    destination directory handle
        BYTE    destination path component count
      N BYTEs   destination path
--------N-21F216SF2F-------------------------
INT 21 - Novell NetWare - GET NAME SPACE INFORMATION
        AX = F216h subfn 2Fh
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02152)
        ES:DI -> reply buffer (see #02153)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=30h,AX=F257h/SF=18h

Format of NetWare "Get Name Space Information" request packet:
Offset  Size    Description     (Table 02152)
 00h    WORD    length of following data
 02h    BYTE    2Fh (subfunction "Get Name Space Information")
 03h    BYTE    volume number
SeeAlso: #02153

Format of NetWare "Get Name Space Information" request packet:
Offset  Size    Description     (Table 02153)
 00h    BYTE    length of namespace name
 01h  N BYTEs   name of namespace
        BYTE    number of data streams
        var     data stream information [one entry per data stream]
                Offset  Size    Description
                 00h    BYTE    associated name space
                 01h    BYTE    length of data stream name
                 02h  N BYTEs   data stream name
        BYTE    number of loaded name spaces
        BYTE    bitmap of loaded name spaces
      N BYTEs   list of name spaces being used
        BYTE    index number
SeeAlso: #02152
--------N-21F216SF30-------------------------
INT 21 - Novell NetWare - GET NAME SPACE DIRECTORY ENTRY
        AX = F216h subfn 30h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02154)
        ES:DI -> reply buffer (see #02155)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=2Fh

Format of NetWare "Get Name Space Directory Entry" request packet:
Offset  Size    Description     (Table 02154)
 00h    WORD    length of following data
 02h    BYTE    30h (subfunction "Get Name Space Directory Entry")
 03h    BYTE    volume number
 04h    DWORD   sequence number (set to 00000000h before first call)
 08h    BYTE    name space (see #02387)
SeeAlso: #02155

Format of NetWare "Get Name Space Directory Entry" request packet:
Offset  Size    Description     (Table 02155)
 00h    DWORD   next sequence number
 04h    DWORD   subdirectory
 08h    DWORD   attributes
 0Ch    BYTE    unique ID
 0Dh    BYTE    flags
 0Eh    BYTE    name space (see #02387)
 0Fh    BYTE    length of name
 10h 12 BYTEs   filename
 1Ch    DWORD   creation date and time
 20h    DWORD   (big-endian) owner ID
 24h    DWORD   last-backup date and time
 28h    DWORD   (big-endian) last-backup ID
 2Ch    DWORD   last-modification date and time
---DOS file---
 30h    DWORD   (big-endian) last-modification ID
 34h    DWORD   file size
 38h 44 BYTEs   reserved
 64h    WORD    inherited rights mask
 66h    WORD    last-access date
 68h 28 BYTEs   reserved
---DOS subdirectory---
 30h    DWORD   next trustee entry
 34h 48 BYTEs   reserved
 64h    WORD    maximum space
 66h    WORD    inherited rights mask
 68h 26 BYTEs   reserved
---Macintosh subdirectory---
 10h 32 BYTEs   Mac filename
 30h    DWORD   resource fork
 34h    DWORD   resource fork size
 38h 32 BYTEs   Finder information
 58h  6 BYTEs   ProDOS information
 5Eh 38 BYTEs   reserved
SeeAlso: #02154
--------N-21F216SF31-------------------------
INT 21 - Novell NetWare - OPEN DATA STREAM
        AX = F216h subfn 31h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02156)
        ES:DI -> reply buffer (see #02157)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=30h

Format of NetWare "Open Data Stream" request packet:
Offset  Size    Description     (Table 02156)
 00h    WORD    length of following data
 02h    BYTE    31h (subfunction "Open Data Stream")
 03h    BYTE    data stream
 04h    BYTE    directory handle
 05h    BYTE    file attributes
 06h    BYTE    open rights
 07h    BYTE    length of filename
 08h  N BYTEs   filename (8.3)
SeeAlso: #02157

Format of NetWare "Open Data Stream" reply packet:
Offset  Size    Description     (Table 02157)
 00h    DWORD   file handle
SeeAlso: #02156
--------N-21F216SF32-------------------------
INT 21 - Novell NetWare v2.2+ - GET OBJECT EFFECTIVE RIGHTS
        AX = F216h subfn 32h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02158)
        ES:DI -> reply buffer (see #02159)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F216h/SF=29h

Format of NetWare "Get Object Effective Rights" request buffer:
Offset  Size    Description     (Table 02158)
 00h    WORD    length of following data
 02h    BYTE    32h (subfunction "Get Object Effective Rights")
 03h    DWORD   object ID
 07h    BYTE    directory handle
 08h    var     counted path string
SeeAlso: #02159

Format of NetWare "Get Object Effective Rights" reply buffer:
Offset  Size    Description     (Table 02159)
 00h    WORD    object's effective rights
 02h  6 BYTEs   reserved
SeeAlso: #02158
--------N-21F216SF33-------------------------
INT 21 - Novell NetWare v2.2+ - GET EXTENDED VOLUME INFORMATION
        AX = F216h subfn 33h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02160)
        ES:DI -> reply buffer (see #02161)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F216h/SF=29h

Format of NetWare "Get Extended Volume Information" request buffer:
Offset  Size    Description     (Table 02160)
 00h    WORD    length of following data
 02h    BYTE    33h (subfunction "Get Extended Volume Information")
---v2.2---
 03h    BYTE    volume ID
---v4.x---
 03h    DWORD   volume number
SeeAlso: #02161

Format of NetWare "Get Extended Volume Information" reply buffer:
Offset  Size    Description     (Table 02161)
 00h    WORD    length of returned data
 02h    DWORD   volume type
 06h    DWORD   status flag bits
                bit 0: suballocation
                bit 1: compressoin
                bit 2: migration
                bit 3: auditing
 0Ah    DWORD   sector size
 0Eh    DWORD   sectors per cluster
 12h    DWORD   total clusters in volume
 16h    DWORD   free clusters
 1Ah    DWORD   freeable suballocated clusters
 1Eh    DWORD   freeable in-limbo sectors
 22h    DWORD   non-freeable in-limbo sectors
 26h    DWORD   non-freeable available suballocated sectors
 2Ah    DWORD   unuable suballocated sectors
 2Eh    DWORD   total suballocated clusters
 32h    DWORD   number of data streams
 36h    DWORD   number of in-limbo data streams
 3Ah    DWORD   age of oldest deleted file in clock ticks
 3Eh    DWORD   number of compressed data streams
 42h    DWORD   number of compressed in-limbo data streams
 46h    DWORD   number of uncompressable data streams
 4Ah    DWORD   number of precompressed sectors
 4Eh    DWORD   number of compressed sectors
 52h    DWORD   number of migrated files
 56h    DWORD   number of migrated sectors
 5Ah    DWORD   number of clusters used by FAT
 5Eh    DWORD   number of clusters used by directories
 62h    DWORD   number of clusters used by extended directories
 66h    DWORD   total number of directory entries
 6Ah    DWORD   number of unused directory entries
 6Eh    DWORD   total number of extended directory extants
 72h    DWORD   number of unused extended directory extants
 76h    DWORD   number of extended attributes defined (see AX=F256h/SF=04h)
 7Ah    DWORD   number of extended-attribute extants used
 7Eh    DWORD   object ID for Directory Services
 82h    DWORD   date and time volume last modified
 86h    var     counted volume name string
SeeAlso: #02160
--------N-21F217SF01-------------------------
INT 21 - Novell NetWare - CHANGE USER PASSWORD (OLD)
        AX = F217h subfn 01h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01891 at AH=E3h/SF=01h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
Note:   this function requires an object of type USER, unlike the newer
          password changing function AX=F217h/SF=40h
SeeAlso: AH=F2h"Novell",AH=E3h/SF=01h,AX=F217h/SF=02h,AX=F217h/SF=40h
--------N-21F217SF02-------------------------
INT 21 - Novell NetWare - GET USER CONNECTION LIST (OLD)
        AX = F217h subfn 02h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01892 at AH=E3h/SF=02h)
        ES:DI -> reply buffer (see #02162)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=02h,AX=F217h/SF=01h,AX=F217h/SF=0Ch

Format of NetWare "Get User Connection List (old)" reply packet:
Offset  Size    Description     (Table 02162)
 00h    BYTE    length of connection list
 01h    BYTE    number of bytes in connection list
 02h  N BYTEs   list of connection numbers in use by user
SeeAlso: #01892
--------N-21F217SF0C-------------------------
INT 21 - Novell NetWare - VERIFY SERIALIZATION
        AX = F217h subfn 0Ch
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01896 at AH=E3h/SF=0Ch)
        ES:DI -> reply buffer (see #02163)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=0Ch,AX=F217h/SF=12h

Format of NetWare "Verify Serialization" reply packet:
Offset  Size    Description     (Table 02163)
 00h    WORD    server application number
SeeAlso: #01896
--------N-21F217SF0E-------------------------
INT 21 - Novell NetWare - GET DISK UTILIZATION
        AX = F217h subfn 0Eh
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01900 at AH=E3h/SF=0Eh)
        ES:DI -> reply buffer (see #02164)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=0Eh,AX=F217h/SF=D6h

Format of NetWare "Get Disk Utilization" reply packet:
Offset  Size    Description     (Table 02164)
 00h    BYTE    volume number (00h-1Fh)
 01h    DWORD   (big-endian) object ID
 05h    WORD    (big-endian) directories used by object
 07h    WORD    (big-endian) files created by object
 09h    WORD    (big-endian) disk blocks used by object-created files
SeeAlso: #01900 at AH=E3h/SF=0Eh
--------N-21F217SF0F-------------------------
INT 21 - Novell NetWare - SCAN FILE INFORMATION
        AX = F217h subfn 0Fh
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01903 at AH=E3h/SF=0Fh)
        ES:DI -> reply buffer (see #02165)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=0Fh,AX=F217h/SF=10h

Format of NetWare "Scan File Information" reply packet:
Offset  Size    Description     (Table 02165)
 00h    WORD    next sequence number (place in request buffer for next call)
 02h 14 BYTEs   ASCIZ filename
 10h    BYTE    file attributes (see #01420 at AX=4301h)
 11h    BYTE    extended file attributes (see #01804 at AH=B6h)
 12h    DWORD   (big-endian) file size in bytes
 16h    WORD    (big-endian) file's creation date (see #01666 at AX=5700h)
 18h    WORD    (big-endian) date of last access (see #01665 at AX=5700h)
 1Ah    DWORD   (big-endian) date and time of last update (see #01846)
 1Eh    DWORD   (big-endian) object ID of owner
 22h    DWORD   (big-endian) date and time last archived (see #01846)
 26h 55 BYTEs   reserved
SeeAlso: #01903 at AH=E3h/SF=0Fh
--------N-21F217SF10-------------------------
INT 21 - Novell NetWare - SET FILE INFORMATION
        AX = F217h subfn 10h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01905 at AH=E3h/SF=10h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=10h,AX=F217h/SF=0Fh
--------N-21F217SF11-------------------------
INT 21 - Novell NetWare - GET FILE SERVER INFORMATION
        AX = F217h subfn 11h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01907 at AH=E3h/SF=11h)
        ES:DI -> reply buffer (see #02166)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=11h,AX=F217h/SF=F1h

Format of NetWare "Get File Server Information" reply packet:
Offset  Size    Description     (Table 02166)
 00h 48 BYTEs   server's name
 30h    BYTE    NetWare version
 31h    BYTE    NetWare subversion (0-99)
 32h    WORD    (big-endian) number of connections supported
                NetWare 4.01 reportedly returns maximum simulataneously-used
                  connections
 34h    WORD    (big-endian) number of connections in use
 36h    WORD    (big-endian) maximum connected volumes
---Advanced NetWare 2.1+ ---
 38h    BYTE    operating system revision number
 39h    BYTE    fault tolerance (SFT) level
 3Ah    BYTE    TTS level
 3Bh    WORD    (big-endian) maximum simultaneously-used connections
                NetWare 4.01 reportedly returns number of connections in use
 3Dh    BYTE    accounting version
 3Eh    BYTE    VAP version
 3Fh    BYTE    queueing version
 40h    BYTE    print server version
 41h    BYTE    virtual console version
 42h    BYTE    security restrictions level
 43h    BYTE    internetwork bridge version
 44h 60 BYTEs   reserved
SeeAlso: #01907
--------N-21F217SF12-------------------------
INT 21 - Novell NetWare - GET NETWORK SERIAL NUMBER
        AX = F217h subfn 12h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01909 at AH=E3h/SF=12h)
        ES:DI -> reply buffer (see #02167)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=12h,AX=F217h/SF=0Ch

Format of NetWare "Get Network Serial Number" reply packet:
Offset  Size    Description     (Table 02167)
 00h   4 BYTEs  (big-endian) NetWare server serial number
 04h   2 BYTEs  (big-endian) NetWare application serial number
SeeAlso: #01909 at AH=E3h/SF=12h
--------N-21F217SF13-------------------------
INT 21 - Novell NetWare - GET INTERNET ADDRESS (OLD)
        AX = F217h subfn 13h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01911 at AH=E3h/SF=13h)
        ES:DI -> reply buffer (see #02168)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=13h,AX=F217h/SF=1Ah

Format of NetWare "Get Internet Address (old)" reply packet:
Offset  Size    Description     (Table 02168)
 00h  4 BYTEs   network number
 04h  6 BYTEs   physical node address
 0Ah  2 BYTEs   socket number
SeeAlso: #01911 at AH=E3h/SF=13h,#02174
--------N-21F217SF14-------------------------
INT 21 - Novell NetWare - LOGIN OBJECT
        AX = F217h subfn 14h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01913 at AH=E3h/SF=14h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=14h,AX=F216h/SF=18h,AX=F217h/SF=CCh
SeeAlso: AX=F258h/SF=03h,AX=F268h/SF=3Dh
--------N-21F217SF15-------------------------
INT 21 - Novell NetWare - GET OBJECT CONNECTION LIST (OLD)
        AX = F217h subfn 15h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01915 at AH=E3h/SF=15h)
        ES:DI -> reply buffer (see #02169)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=15h,AX=F217h/SF=1Bh

Format of NetWare "Get Object Connection List (old)" reply packet:
Offset  Size    Description     (Table 02169)
 00h    BYTE    number of connections
 01h  N BYTEs   connection list
SeeAlso: #01915
--------N-21F217SF16-------------------------
INT 21 - Novell NetWare - GET CONNECTION INFORMATION (OLD)
        AX = F217h subfn 16h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02170)
        ES:DI -> reply buffer (see #02171)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AH=F2h"Novell",AX=F217h/SF=1Ch,AX=F217h/SF=1Fh

Format of NetWare "Get Connection Information (old)" request packet:
Offset  Size    Description     (Table 02170)
 00h    WORD    0002h (length of following data)
 02h    BYTE    16h (subfunction "Get Connection Information (old)")
 03h    BYTE    target connection number
Note:   connection numbers greater than the maximum supported by the server
          can cause ABENDs
SeeAlso: #02171

Format of NetWare "Get Connection Information (old)" reply packet:
Offset  Size    Description     (Table 02171)
 00h    DWORD   (big-endian) unique user ID, 00000000h if no one logged in
 04h    WORD    (big-endian) user type
 06h 48 BYTEs   user name
 36h  7 BYTEs   login time (see #02087)
 3Dh    BYTE    reserved
SeeAlso: #02170
--------N-21F217SF17-------------------------
INT 21 - Novell NetWare - GET ENCRYPTION KEY
        AX = F217h subfn 17h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02172)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=18h,AX=F217h/SF=4Ah,AX=F217h/SF=4Bh

Format of NetWare "Get Encryption Key" request packet:
Offset  Size    Description     (Table 02172)
 00h    WORD    length of following data
 02h    BYTE    17h (subfunction "Get Encryption Key")
        ???
--------N-21F217SF18-------------------------
INT 21 - Novell NetWare - LOGIN OBJECT ENCRYPTED
        AX = F217h subfn 18h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02173)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=14h,AX=F217h/SF=17h

Format of NetWare "Login Object Encrypted" request packet:
Offset  Size    Description     (Table 02173)
 00h    WORD    length of following data
 02h    BYTE    18h (subfunction "Login Object Encrypted")
        ???
--------N-21F217SF1A-------------------------
INT 21 - Novell NetWare - GET INTERNET ADDRESS
        AX = F217h subfn 1Ah
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02174)
        ES:DI -> reply buffer (see #02175)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=13h

Format of NetWare "Get Internet Address" request packet:
Offset  Size    Description     (Table 02174)
 00h    WORD    length of following data
 02h    BYTE    1Ah (subfunction "Get Internet Address")
 03h    DWORD   target connection ID
SeeAlso: #02175

Format of NetWare "Get Internet Address" reply packet:
Offset  Size    Description     (Table 02175)
 00h  4 BYTEs   network number
 04h  6 BYTEs   physical node address
 0Ah  2 BYTEs   socket number
 0Ch    BYTE    connection type
                00h not in use
                02h NCP
                03h AFP
SeeAlso: #02174
--------N-21F217SF1B-------------------------
INT 21 - Novell NetWare - GET OBJECT CONNECTION LIST
        AX = F217h subfn 1Bh
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02176)
        ES:DI -> reply buffer (see #02177)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=15h

Format of NetWare "Get Object Connection List" request packet:
Offset  Size    Description     (Table 02176)
 00h    WORD    length of following data
 02h    BYTE    1Bh (subfunction "Get Object Connection List")
 03h    DWORD   search connection number
                set to highest connection number returned by previous call, or
                  00000000h before first call
 07h    WORD    object type
 09h    BYTE    length of object's name
 0Ah  N BYTEs   object name
SeeAlso: #02177

Format of NetWare "Get Object Connection List" reply packet:
Offset  Size    Description     (Table 02177)
 00h    BYTE    length of connection number list
 01h  N WORDs   array of server connection numbers
SeeAlso: #02176
--------N-21F217SF1C-------------------------
INT 21 - Novell NetWare v3+ - GET CONNECTION INFORMATION
        AX = F217h subfn 1Ch
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02178)
        ES:DI -> reply buffer (see #02179)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AH=F2h"Novell",AX=F217h/SF=16h,AX=F217h/SF=1Fh

Format of NetWare "Get Connection Information" request packet:
Offset  Size    Description     (Table 02178)
 00h    WORD    0005h (length of following data)
 02h    BYTE    1Ch (subfunction "Get Connection Information")
 03h    DWORD   target connection number
Note:   connection numbers greater than the maximum supported by the server
          can cause ABENDs
SeeAlso: #02179,#02170

Format of NetWare "Get Connection Information" reply packet:
Offset  Size    Description     (Table 02179)
 00h    DWORD   (big-endian) unique user ID, 00000000h if no one logged in
 04h    WORD    (big-endian) user type
 06h 48 BYTEs   user name
 36h  7 BYTEs   login time (see #02087)
 3Dh    BYTE    reserved
SeeAlso: #02178,#02171
--------N-21F217SF1D-------------------------
INT 21 - Novell NetWare v4 - CHANGE CONNECTION STATE
        AX = F217h subfn 1Dh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02180)
        ES:DI -> reply buffer
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled

Format of NetWare "Change Connection State" requst buffer:
Offset  Size    Description     (Table 02180)
 00h    WORD    length of following data
 02h    BYTE    1Dh (subfunction "Change Connection State")
 03h    DWORD   new state
--------N-21F217SF1E-------------------------
INT 21 - Novell NetWare v4 - SET WATCHDOG DELAY INTERVAL
        AX = F217h subfn 1Eh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02181)
        ES:DI -> reply buffer
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled

Format of NetWare "Set Watchdog Delay Interval" request buffer:
Offset  Size    Description     (Table 02181)
 00h    WORD    length of following data
 02h    BYTE    1Eh (subfunction "Set Watchdog Delay Interval")
 03h    DWORD   interval in minutes
--------N-21F217SF1F-------------------------
INT 21 - Novell NetWare v4 - GET CONNECTION LIST
        AX = F217h subfn 1Fh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02182)
        ES:DI -> reply buffer (see #02183)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled

Format of NetWare "Get Connection List" request buffer:
Offset  Size    Description     (Table 02182)
 00h    WORD    length of following data
 02h    BYTE    1Fh (subfunction "Get Connection List")
 03h    DWORD   object ID
 07h    DWORD   ??? (initialize to FFFFFFFFh before first call)
SeeAlso: #02183

Format of NetWare "Get Connection List" reply buffer:
Offset  Size    Description     (Table 02183)
 00h    WORD    number of connections following (max 50)
 02h 50 DWORDs  connection numbers
SeeAlso: #02182
--------N-21F217SF32-------------------------
INT 21 - Novell NetWare - CREATE BINDERY OBJECT
        AX = F217h subfn 32h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01921 at AH=E3h/SF=32h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=32h,AX=F217h/SF=33h,AX=F217h/SF=34h
--------N-21F217SF33-------------------------
INT 21 - Novell NetWare - DELETE BINDERY OBJECT
        AX = F217h subfn 33h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01923 at AH=E3h/SF=33h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=33h,AX=F217h/SF=32h,AX=F217h/SF=34h
--------N-21F217SF34-------------------------
INT 21 - Novell NetWare - RENAME BINDERY OBJECT
        AX = F217h subfn 34h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01924 at AH=E3h/SF=34h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=34h,AX=F217h/SF=32h,AX=F217h/SF=33h
--------N-21F217SF35-------------------------
INT 21 - Novell NetWare - GET BINDERY OBJECT ID
        AX = F217h subfn 35h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01925 at AH=E3h/SF=35h)
        ES:DI -> reply buffer (see #02184)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=35h,AX=F217h/SF=36h,AX=F217h/SF=45h

Format of NetWare "Get Bindery Object ID" reply packet:
Offset  Size    Description     (Table 02184)
 00h    DWORD   (big-endian) object ID
 04h    WORD    (big-endian) type of object
 06h 48 BYTEs   object name
SeeAlso: #01925 at AH=E3h/SF=35h
--------N-21F217SF36-------------------------
INT 21 - Novell NetWare - GET BINDERY OBJECT NAME
        AX = F217h subfn 36h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01928 at AH=E3h/SF=36h)
        ES:DI -> reply buffer (see #02185)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=36h,AX=F217h/SF=35h,AX=F217h/SF=37h

Format of NetWare "Get Bindery Object Name" reply packet:
Offset  Size    Description     (Table 02185)
 00h    DWORD   (big-endian) object ID
 04h    WORD    (big-endian) type of object
 06h 48 BYTEs   object name
SeeAlso: #01928 at AH=E3h/SF=36h
--------N-21F217SF37-------------------------
INT 21 - Novell NetWare - SCAN BINDERY OBJECT
        AX = F217h subfn 37h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01930 at AH=E3h/SF=37h)
        ES:DI -> reply buffer (see #02186)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=37h,AX=F217h/SF=3Ch

Format of NetWare "Scan Bindery Object" reply packet:
Offset  Size    Description     (Table 02186)
 00h
SeeAlso: #01930
--------N-21F217SF38-------------------------
INT 21 - Novell NetWare - CHANGE BINDERY OBJECT SECURITY
        AX = F217h subfn 38h
        CX = length of request packet in bytes
        DX = 0000h (no reply buffer)
        DS:SI -> request packet (see #01932 at AH=E3h/SF=38h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=38h,AX=F217h/SF=32h
--------N-21F217SF39-------------------------
INT 21 - Novell NetWare - CREATE PROPERTY
        AX = F217h subfn 39h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01934 at AH=E3h/SF=39h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=39h,AX=F217h/SF=3Ah
--------N-21F217SF3A-------------------------
INT 21 - Novell NetWare - DELETE PROPERTY
        AX = F217h subfn 3Ah
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01936 at AH=E3h/SF=3Ah)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=3Ah,AX=F217h/SF=39h,AX=F217h/SF=3Bh
--------N-21F217SF3B-------------------------
INT 21 - Novell NetWare - CHANGE PROPERTY SECURITY
        AX = F217h subfn 3Bh
        CX = length of request packet in bytes
        DX = 0000h (no reply buffer)
        DS:SI -> request packet (see #01938 at AH=E3h/SF=3Bh)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=3Bh
--------N-21F217SF3C-------------------------
INT 21 - Novell NetWare - SCAN PROPERTY
        AX = F217h subfn 3Ch
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01939 at AH=E3h/SF=3Ch)
        ES:DI -> reply buffer (see #02187)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=3Ch,AX=F217h/SF=39h,AX=F217h/SF=3Dh

Format of NetWare "Scan Property" reply packet:
Offset  Size    Description     (Table 02187)
 00h
SeeAlso: #01939
--------N-21F217SF3D-------------------------
INT 21 - Novell NetWare - READ PROPERTY VALUE
        AX = F217h subfn 3Dh
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01942 at AH=E3h/SF=3Dh)
        ES:DI -> reply buffer (see #02188)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=3Dh,AX=F217h/SF=39h,AX=F217h/SF=3Eh

Format of NetWare "Read Property Value" request packet:
Offset  Size    Description     (Table 02188)
 00h
SeeAlso: #01942
--------N-21F217SF3E-------------------------
INT 21 - Novell NetWare - WRITE PROPERTY VALUE
        AX = F217h subfn 3Eh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01944 at AH=E3h/SF=3Eh)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=3Eh,AX=F217h/SF=39h,AX=F217h/SF=3Dh
--------N-21F217SF3F-------------------------
INT 21 - Novell NetWare - VERIFY BINDERY OBJECT PASSWORD
        AX = F217h subfn 3Fh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01947 at AH=E3h/SF=3Fh)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=3Fh,AX=F217h/SF=40h
--------N-21F217SF40-------------------------
INT 21 - Novell NetWare - CHANGE BINDERY OBJECT PASSWORD
        AX = F217h subfn 40h
        CX = length of request packet in bytes
        DX = 0000h (no reply buffer)
        DS:SI -> request packet (see #01948 at AH=E3h/SF=40h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=40h,AX=F217h/SF=3Fh
--------N-21F217SF41-------------------------
INT 21 - Novell NetWare v2.2+ - ADD OBJECT TO SET
        AX = F217h subfn 41h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01951 at AH=E3h/SF=41h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
Desc:   add a member to an object's group property
SeeAlso: AH=F2h"Novell",AH=E3h/SF=41h,AX=F217h/SF=42h,AX=F217h/SF=43h
--------N-21F217SF42-------------------------
INT 21 - Novell NetWare - DELETE BINDERY OBJECT FROM SET
        AX = F217h subfn 42h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01952 at AH=E3h/SF=42h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=42h,AX=F217h/SF=41h,AX=F217h/SF=43h
--------N-21F217SF43-------------------------
INT 21 - Novell NetWare - IS BINDERY OBJECT IN SET?
        AX = F217h subfn 43h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01954 at AH=E3h/SF=43h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=43h,AX=F217h/SF=41h,AX=F217h/SF=42h
--------N-21F217SF44-------------------------
INT 21 - Novell NetWare - CLOSE BINDERY
        AX = F217h subfn 44h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01955 at AH=E3h/SF=44h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=44h,AX=F217h/SF=45h
--------N-21F217SF45-------------------------
INT 21 - Novell NetWare - OPEN BINDERY
        AX = F217h subfn 45h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01956 at AH=E3h/SF=45h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=45h,AX=F217h/SF=44h
--------N-21F217SF46-------------------------
INT 21 - Novell NetWare - GET BINDERY ACCESS LEVEL
        AX = F217h subfn 46h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01957 at AH=E3h/SF=46h)
        ES:DI -> reply buffer (see #02189)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=46h,AX=F217h/SF=45h

Format of NetWare "Get Bindery Access Level" reply packet:
Offset  Size    Description     (Table 02189)
 00h    BYTE    security levels
 01h    DWORD   (big-endian) object ID
SeeAlso: #01957,#01958 at AH=E3h/SF=46h
--------N-21F217SF47-------------------------
INT 21 - Novell NetWare - SCAN BINDERY OBJECT TRUSTEE PATHS
        AX = F217h subfn 47h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01959 at AH=E3h/SF=47h)
        ES:DI -> reply buffer (see #02190)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=47h,AX=F216h/SF=0Ch,AX=F217h/SF=48h

Format of NetWare "Scan Bindery Object Trustee Paths" reply packet:
Offset  Size    Description     (Table 02190)
 00h    WORD    (big-endian) next sequence number
 02h    DWORD   (big-endian) object ID
 06h    BYTE    trustee directory rights (see #01849 at AH=E2h/SF=03h)
 07h    BYTE    length of trustee path
 08h  N BYTEs   trustee path
SeeAlso: #01959,#01960 at AH=E3h/SF=47h
--------N-21F217SF48-------------------------
INT 21 - Novell NetWare - GET BINDERY OBJECT ACCESS LEVEL
        AX = F217h subfn 48h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02191)
        ES:DI -> reply buffer (see #02192)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=45h,AX=F217h/SF=46h

Format of NetWare "Get Bindery Object Access Level" request packet:
Offset  Size    Description     (Table 02191)
 00h    WORD    length of following data (max ABh)
 02h    BYTE    48h (subfunction "Get Bindery Object Access Level")
 03h    DWORD   object ID
SeeAlso: #02192

Format of NetWare "Get Bindery Object Access Level" reply packet:
Offset  Size    Description     (Table 02192)
 00h    BYTE    object access level
SeeAlso: #02191
--------N-21F217SF49-------------------------
INT 21 - Novell NetWare - IS STATION A MANAGER?
        AX = F217h subfn 49h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02193)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=43h

Format of NetWare "Is Station A Manager?" request packet:
Offset  Size    Description     (Table 02193)
 00h    WORD    length of following data
 02h    BYTE    49h (subfunction "Is Station A Manager?")
 03h    DWORD   object ID
--------N-21F217SF4A-------------------------
INT 21 - Novell NetWare - KEYED VERIFY BINDERY OBJECT PASSWORD
        AX = F217h subfn 4Ah
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02194)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=4Bh

Format of NetWare "Keyed Verify Bindery Object Password" request packet:
Offset  Size    Description     (Table 02194)
 00h    WORD    length of following data
 02h    BYTE    4Ah (subfunction "Keyed Verify Bindery Object Password")
 03h  8 BYTEs   key
 0Bh    WORD    type
 0Dh    BYTE    length of object's name
 0Eh  N BYTEs   object name
SeeAlso: #02195
--------N-21F217SF4B-------------------------
INT 21 - Novell NetWare - KEYED CHANGE BINDERY OBJECT PASSWORD
        AX = F217h subfn 4Bh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02195)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=4Ah

Format of NetWare "Keyed Change Bindery Object Password" request packet:
Offset  Size    Description     (Table 02195)
 00h    WORD    length of following data
 02h    BYTE    4Bh (subfunction "Keyed Change Bindery Object Password")
 03h  8 BYTEs   key
 0Bh    WORD    type
 0Dh    BYTE    length of object name
 0Eh  N BYTEs   object name
        BYTE    length of new password
      N BYTEs   new password
SeeAlso: #01948
--------N-21F217SF4C-------------------------
INT 21 - Novell NetWare - LIST RELATIONS OF AN OBJECT
        AX = F217h subfn 4Ch
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02196)
        ES:DI -> reply buffer (see #02197)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=39h

Format of NetWare "List Relations Of An Object" request packet:
Offset  Size    Description     (Table 02196)
 00h    WORD    length of following data
 02h    BYTE    4Ch (subfunction "List Relations Of An Object")
 03h    DWORD   last bindery ID seen (set to FFFFFFFFh on first call)
 07h    WORD    object type
 09h    BYTE    length of object's name
 0Ah  N BYTEs   object's name
        BYTE    length of property name
      N BYTEs   property name
SeeAlso: #02197

Format of NetWare "List Relations Of An Object" reply packet:
Offset  Size    Description     (Table 02197)
 00h    WORD    number of relations returned
 02h    var     relations
SeeAlso: #02196
--------N-21F217SF64-------------------------
INT 21 - Novell NetWare v2.1+ - CREATE QUEUE
        AX = F217h subfn 64h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01962 at AH=E3h/SF=64h)
        ES:DI -> reply buffer (see #02198)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=64h,AX=F217h/SF=65h,AX=F217h/SF=66h

Format of NetWare "Create Queue" reply packet:
Offset  Size    Description     (Table 02198)
 00h    DWORD   (big-endian) object ID of queue
SeeAlso: #01962,#01963
--------N-21F217SF65-------------------------
INT 21 - Novell NetWare v2.1+ - DESTROY QUEUE
        AX = F217h subfn 65h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01964 at AH=E3h/SF=65h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=65h,AX=F217h/SF=64h,AX=F217h/SF=66h
--------N-21F217SF66-------------------------
INT 21 - Novell NetWare v2.1+ - READ QUEUE CURRENT STATUS (OLD)
        AX = F217h subfn 66h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01965 at AH=E3h/SF=64h)
        ES:DI -> reply buffer (see #02199)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=66h,AX=F217h/SF=64h,AX=F217h/SF=67h

Format of NetWare "Read Queue Current Status (Old)" reply packet:
Offset  Size    Description     (Table 02199)
 00h    DWORD   (big-endian) object ID of queue
 04h    BYTE    status of queue (see #01967)
 05h    BYTE    number of jobs in queue (00h-FAh)
 06h    BYTE    number of servers attached to queue (00h-19h)
 07h 25 DWORDs  list of object IDs of attached servers
 6Bh 25 BYTEs   list of attached servers' stations
 84h    BYTE    (call) maximum number of servers to return
SeeAlso: #01965,#01966 at AH=E3h/SF=66h
--------N-21F217SF67-------------------------
INT 21 - Novell NetWare v2.1+ - SET QUEUE CURRENT STATUS (OLD)
        AX = F217h subfn 67h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01968 at AH=E3h/SF=67h)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=67h,AX=F217h/SF=66h,AX=F217h/SF=68h
--------N-21F217SF68-------------------------
INT 21 - Novell NetWare v2.1+ - CREATE QUEUE JOB AND FILE (OLD)
        AX = F217h subfn 68h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01970 at AH=E3h/SF=68h)
        ES:DI -> reply buffer (see #02200)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=68h,AX=F217h/SF=67h,AX=F217h/SF=69h

Format of NetWare "Create Queue Job And File (Old)" reply packet:
Offset  Size    Description     (Table 02200)
 00h    BYTE    client station
 01h    BYTE    client task number
 02h    DWORD   (big-endian) object ID of client
 06h    DWORD   (big-endian) object ID of target server
 0Ah  6 BYTEs   target execution time (year,month,day,hour,minute,second)
 10h  6 BYTEs   job entry time (year,month,day,hour,minute,second)
 16h    WORD    (big-endian) job number
 18h    WORD    (big-endian) job type
 1Ah    BYTE    job position
 1Bh    BYTE    job control flags (see #01980)
 1Ch 14 BYTEs   ASCIZ job file name
 2Ah  6 BYTEs   job file handle
 30h    BYTE    server station
 31h    BYTE    server task number
 32h    DWORD   (big-endian) object ID of server or 00000000h
SeeAlso: #01970,#01972
--------N-21F217SF69-------------------------
INT 21 - Novell NetWare v2.1+ - CLOSE FILE AND START QUEUE JOB (OLD)
        AX = F217h subfn 69h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01973 at AH=E3h/SF=69h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=69h,AX=F217h/SF=6Ah,AX=F217h/SF=7Fh
--------N-21F217SF6A-------------------------
INT 21 - Novell NetWare v2.1+ - REMOVE JOB FROM QUEUE (OLD)
        AX = F217h subfn 6Ah
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01975 at AH=E3h/SF=6Ah)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=6Ah,AX=F217h/SF=68h,AX=F217h/SF=69h
--------N-21F217SF6B-------------------------
INT 21 - Novell NetWare v2.1+ - GET QUEUE JOB LIST (OLD)
        AX = F217h subfn 6Bh
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01976 at AH=E3h/SF=6Bh)
        ES:DI -> reply buffer (see #02201)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=6Bh,AX=F217h/SF=6Ah,AX=F217h/SF=6Ch
SeeAlso: AX=F217h/SF=81h

Format of NetWare "Get Queue Job List (old)" reply packet:
Offset  Size    Description     (Table 02201)
 00h    WORD    (big-endian) job count
 02h  N WORDs   (big-endian) list of job numbers by position in queue
SeeAlso: #01976,#01977 at AH=E3h/SF=6Bh
--------N-21F217SF6C-------------------------
INT 21 - Novell NetWare v2.1+ - READ QUEUE JOB ENTRY (OLD)
        AX = F217h subfn 6Ch
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01978 at AH=E3h/SF=6Ch)
        ES:DI -> reply buffer (see #02202)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=6Ch,AX=F217h/SF=6Bh,AX=F217h/SF=6Dh

Format of NetWare "Read Queue Job Entry (old)" reply packet:
Offset  Size    Description     (Table 02202)
 00h    BYTE    client station number
 01h    BYTE    client task number
 02h    DWORD   object ID of client
 06h    DWORD   (big-endian) object ID of target server
                FFFFFFFFh if any server acceptable
 0Ah  6 BYTEs   target execution time (year,month,day,hour,minute,second)
                FFFFFFFFFFFFh if serviced as soon as possible
 10h  6 BYTEs   job entry time (year,month,day,hour,minute,second)
 16h    WORD    (big-endian) job number
 18h    WORD    (big-endian) job type
 1Ah    BYTE    job position
 1Bh    BYTE    job control flags (see #01980)
 1Ch 14 BYTEs   ASCIZ job filename
 2Ah  6 BYTEs   job file handle
 30h    BYTE    server station
 31h    BYTE    server task number
 32h    DWORD   object ID of server
 36h 50 BYTEs   ASCIZ job description string
 68h 152 BYTEs  client record area
SeeAlso: #01978,#01979
--------N-21F217SF6D-------------------------
INT 21 - Novell NetWare v2.1+ - CHANGE QUEUE JOB ENTRY (OLD)
        AX = F217h subfn 6Dh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01981 at AH=E3h/SF=6Dh)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=7Bh,AH=E3h/SF=6Dh,AX=F217h/SF=6Ch
--------N-21F217SF6E-------------------------
INT 21 - Novell NetWare v2.1+ - CHANGE QUEUE JOB POSITION
        AX = F217h subfn 6Eh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01982 at AH=E3h/SF=6Eh)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AX=F217h/SF=6Dh,AH=E3h/SF=6Eh
--------N-21F217SF6F-------------------------
INT 21 - Novell NetWare v2.1+ - ATTACH QUEUE SERVER TO QUEUE
        AX = F217h subfn 6Fh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01984 at AH=E3h/SF=6Fh)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=6Fh,AX=F217h/SF=D2h
--------N-21F217SF70-------------------------
INT 21 - Novell NetWare v2.1+ - DETACH QUEUE SERVER FROM QUEUE
        AX = F217h subfn 70h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01985 at AH=E3h/SF=70h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=70h,AX=F217h/SF=6Fh
--------N-21F217SF71-------------------------
INT 21 - Novell NetWare v2.1+ - SERVICE QUEUE JOB AND OPEN FILE
        AX = F217h subfn 71h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01986 at AH=E3h/SF=71h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
Notes:  the caller must be on a workstation which is security-equivalent to a
          member of the queue's Q_USERS, Q_OPERATORS, or Q_SERVERS properties
SeeAlso: AH=E3h/SF=71h,AX=F217h/SF=70h,AX=F217h/SF=72h
--------N-21F217SF72-------------------------
INT 21 - Novell NetWare v2.1+ - FINISH SERVICING QUEUE JOB (OLD)
        AX = F217h subfn 72h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01987 at AH=E3h/SF=72h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=72h,AX=F217h/SF=71h,AX=F217h/SF=73h
SeeAlso: AX=F217h/SF=83h
--------N-21F217SF73-------------------------
INT 21 - Novell NetWare v2.1+ - ABORT SERVICING QUEUE JOB (OLD)
        AX = F217h subfn 73h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01988 at AH=E3h/SF=73h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=73h,AX=F217h/SF=72h,AX=F217h/SF=84h
--------N-21F217SF74-------------------------
INT 21 - Novell NetWare v2.1+ - CHANGE TO CLIENT RIGHTS (OLD)
        AX = F217h subfn 74h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01990 at AH=E3h/SF=74h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
Desc:   temporarily assume the login identity of the client submitting the
          job being serviced
SeeAlso: AH=F2h"NetWare",AH=E3h/SF=74h,AX=F217h/SF=85h
--------N-21F217SF75-------------------------
INT 21 - Novell NetWare v2.1+ - RESTORE QUEUE SERVER RIGHTS
        AX = F217h subfn 75h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01991 at AH=E3h/SF=75h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=75h,AX=F217h/SF=74h
--------N-21F217SF76-------------------------
INT 21 - Novell NetWare - READ QUEUE SERVER CURRENT STATUS (OLD)
        AX = F217h subfn 76h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01992 at AH=E3h/SF=76h)
        ES:DI -> reply buffer (see #02203)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=76h,AX=F217h/SF=74h,AX=F217h/SF=77h

Format of NetWare "Read Queue Server Current Status (old)" reply packet:
Offset  Size    Description     (Table 02203)
 00h 64 BYTEs   server status record (format depends on server)
                first four bytes should contain estimated "price" for an
                  average job
SeeAlso: #01992,#01993 at AH=E3h/SF=76h
--------N-21F217SF77-------------------------
INT 21 - Novell NetWare - SET QUEUE SERVER CURRENT STATUS
        AX = F217h subfn 77h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01994 at AH=E3h/SF=77h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=77h,AX=F217h/SF=76h
--------N-21F217SF78-------------------------
INT 21 - Novell NetWare - GET QUEUE JOB FILE SIZE (OLD)
        AX = F217h subfn 78h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #01996 at AH=E3h/SF=78h)
        ES:DI -> reply buffer (see #02204)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=78h,AX=F217h/SF=71h,AX=F217h/SF=79h

Format of NetWare "Get Queue Job File Size (old)" reply packet:
Offset  Size    Description     (Table 02204)
 00h    DWORD   (big-endian) object ID of queue
 04h    WORD    (big-endian) job number
 06h    DWORD   (big-endian) size of job file in bytes
SeeAlso: #01996,#01997 at AH=E3h/SF=78h
--------N-21F217SF79-------------------------
INT 21 - Novell NetWare - CREATE QUEUE JOB AND FILE
        AX = F217h subfn 79h
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02205)
        ES:DI -> reply buffer (see #02206)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=7Ah,AX=F217h/SF=7Bh

Format of NetWare "Create Queue Job And File" request packet:
Offset  Size    Description     (Table 02205)
 00h    WORD    length of following data
 02h    BYTE    79h (subfunction "Create Queue Job And File")
 03h    DWORD   queue ID
 07h 280 BYTEs  queue job structure (see #02210)
SeeAlso: #02206,#02207,#02209

Format of NetWare "Create Queue Job And File" reply packet:
Offset  Size    Description     (Table 02206)
 00h 10 BYTEs   reserved for future use
 0Ah    DWORD   client station
 0Eh    DWORD   client task
 12h    DWORD   client ID
 16h    DWORD   target server ID
 1Ah  6 BYTEs   target execution time year,month,day,hour,minute,second
                (FFFFFFFFFFFFh = first opportunity)
 20h  6 BYTEs   job entry time
                (set by queue manager)
 26h    DWORD   job number (1-999) assigned by queue manager
 2Ah    WORD    job type
 2Ch    WORD    position of job in queue (0001h = first, etc.)
 2Eh    WORD    job control flags (see #01980 at AH=E3h/SF=6Ch)
 30h 14 BYTEs   ASCIZ job file name
 3Eh    DWORD   job file handle (set by queue manager)
 42h    DWORD   server station (set by queue manager)
 46h    DWORD   server task number (set by queue manager)
 4Ah    DWORD   server object ID (set by queue manager)
SeeAlso: #02205,#02210
--------N-21F217SF7A-------------------------
INT 21 - Novell NetWare - READ QUEUE JOB ENTRY
        AX = F217h subfn 7Ah
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02207)
        ES:DI -> reply buffer (see #02208)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=79h,AX=F217h/SF=7Bh

Format of NetWare "Read Queue Job Entry" request packet:
Offset  Size    Description     (Table 02207)
 00h    WORD    length of following data
 02h    BYTE    7Ah (subfunction "Read Queue Job Entry")
 03h    DWORD   queue ID
 07h    DWORD   job entry number
SeeAlso: #02208,#02205,#02209

Format of NetWare "Read Queue Job Entry" reply packet:
Offset  Size    Description     (Table 02208)
 00h 280 BYTEs  job structure (see #02210)
SeeAlso: #02207
--------N-21F217SF7B-------------------------
INT 21 - Novell NetWare v2.1+ - CHANGE QUEUE JOB ENTRY
        AX = F217h subfn 7Bh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02209)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=6Dh,AX=F217h/SF=79h,AX=F217h/SF=7Dh

Format of NetWare "Change Queue Job Entry" request packet:
Offset  Size    Description     (Table 02209)
 00h    WORD    length of following data
 02h    BYTE    7Bh (subfunction "Change Queue Job Entry")
 03h    DWORD   queue ID
 07h 280 BYTEs  job structure (see #02210)
SeeAlso: #02205,#02207

Format of NetWare v3.11+ job structure:
Offset  Size    Description     (Table 02210)
 00h    WORD    record-in-use flag
 02h    DWORD   -> previous record
 06h    DWORD   -> next record
 0Ah    DWORD   client station connection number
 0Eh    DWORD   client task number
                (set by queue manager)
 12h    DWORD   client object ID
 16h    DWORD   target server object ID
 1Ah  6 BYTEs   target execution time year,month,day,hour,minute,second
                (FFFFFFFFFFFFh = first opportunity)
 20h  6 BYTEs   job entry time
                (set by queue manager)
 26h    DWORD   job number (1-999) assigned by queue manager
 2Ah    WORD    job type
 2Ch    WORD    position of job in queue (0001h = first, etc.)
 2Eh    WORD    job control flags (see #01980 at AH=E3h/SF=6Ch)
 30h 14 BYTEs   ASCIZ job file name
 3Eh    DWORD   job file handle (set by queue manager)
 42h    DWORD   server station (set by queue manager)
 46h    DWORD   server task number (set by queue manager)
 4Ah    DWORD   server object ID (set by queue manager)
 4Eh 50 BYTEs   ASCIZ job description string
 80h 152 BYTEs  client record area
SeeAlso: #02209,#01971
--------N-21F217SF7D-------------------------
INT 21 - Novell NetWare - READ QUEUE CURRENT STATUS
        AX = F217h subfn 7Dh
        CX = length of request packet in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request packet (see #02211)
        ES:DI -> reply buffer (see #02212)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=66h,AX=F217h/SF=79h,AX=F217h/SF=7Bh
SeeAlso: AX=F217h/SF=7Eh

Format of NetWare "Read Queue Current Status" request packet:
Offset  Size    Description     (Table 02211)
 00h    WORD    length of following data
 02h    BYTE    7Dh (subfunction "Read Queue Current Status")
 03h    DWORD   (big-endian) object ID of queue
SeeAlso: #02212,#02213

Format of NetWare "Read Queue Current Status" reply packet:
Offset  Size    Description     (Table 02212)
 00h    DWORD   queue ID
 04h    DWORD   queue status
                bit 0: no more jobs can be added
                bit 1: no more queue servers can be attached
                bit 2: attached queu servers can not service queue jobs
 08h    DWORD   current number of jobs in queue
 0Ch    DWORD   number of servers attached to queue
 10h  N DWORDs  attached server IDs
SeeAlso: #02211,#01966 at AH=E3h/SF=66h
--------N-21F217SF7E-------------------------
INT 21 - Novell NetWare - SET QUEUE CURRENT STATUS
        AX = F217h subfn 7Eh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02213)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=7Dh

Format of NetWare "Set Queue Current Status" request packet:
Offset  Size    Description     (Table 02213)
 00h    WORD    length of following data
 02h    BYTE    7Eh (subfunction "Set Queue Current Status")
 03h    DWORD   queue ID
 07h    DWORD   queue status
                bit 0: no more jobs can be added
                bit 1: no more queue servers can be attached
                bit 2: attached queu servers can not service queue jobs
SeeAlso: #02211
--------N-21F217SF7F-------------------------
INT 21 - Novell NetWare - CLOSE FILE AND START QUEUE JOB
        AX = F217h subfn 7Fh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02214)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=69h,AX=F217h/SF=80h,AX=F217h/SF=81h

Format of NetWare "Close File And Start Queue Job" request packet:
Offset  Size    Description     (Table 02214)
 00h    WORD    length of following data
 02h    BYTE    7Fh (subfunction "Close File And Start Queue Job")
 03h    DWORD   queue ID
 07h    DWORD   job number
--------N-21F217SF80-------------------------
INT 21 - Novell NetWare - REMOVE JOB FROM QUEUE
        AX = F217h subfn 80h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02215)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=6Ah,AX=F217h/SF=7Fh

Format of NetWare "Remove Job From Queue" request packet:
Offset  Size    Description     (Table 02215)
 00h    WORD    length of following data
 02h    BYTE    80h (subfunction "Remove Job From Queue")
 03h    DWORD   queue ID
 07h    DWORD   job number (returned when job was added to queue)
--------N-21F217SF81-------------------------
INT 21 - Novell NetWare - GET QUEUE JOB LIST
        AX = F217h subfn 81h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02216)
        ES:DI -> reply buffer (see #02217)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=6Bh

Format of NetWare "Get Queue Job List" request packet:
Offset  Size    Description     (Table 02216)
 00h    WORD    length of following data
 02h    BYTE    81h (subfunction "Get Queue Job List")
 03h    DWORD   queue ID
 07h    DWORD   address of next job in queue
SeeAlso: #02217

Format of NetWare "Get Queue Job List" reply packet:
Offset  Size    Description     (Table 02217)
 00h    DWORD   total jobs in queue
 04h    DWORD   length of job number list (max 125)
 08h  N DWORDs  list of job numbers in queue
SeeAlso: #02216
--------N-21F217SF82-------------------------
INT 21 - Novell NetWare v2.1+ - CHANGE JOB PRIORITY
        AX = F217h subfn 82h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02218)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell"

Format of NetWare "Change Job Priority" request packet:
Offset  Size    Description     (Table 02218)
 00h    WORD    length of following data
 02h    BYTE    82h (subfunction "Change Job Priority")
 03h    DWORD   queue ID
 07h    DWORD   job number
 0Bh    DWORD   priority
--------N-21F217SF83-------------------------
INT 21 - Novell NetWare v3.1+ - FINISH SERVICING QUEUE JOB
        AX = F217h subfn 83h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #01998 at AH=E3h/SF=83h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=83h,AX=F217h/SF=72h,AX=F217h/SF=84h
--------N-21F217SF84-------------------------
INT 21 - Novell NetWare v3.1+ - ABORT SERVICING QUEUE JOB
        AX = F217h subfn 84h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02000 at AH=E3h/SF=84h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
Desc:   inform the Queue Management System (QMS) that the queue server is
          unable to service a previously-accepted job
SeeAlso: AH=F2h"Novell",AH=E3h/SF=84h,AX=F217h/SF=73h,AX=F217h/SF=83h
--------N-21F217SF85-------------------------
INT 21 - Novell NetWare v3.1+ - CHANGE TO CLIENT RIGHTS
        AX = F217h subfn 85h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02219)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
Desc:   temporarily assume the login identity of the client submitting the
          job being serviced
SeeAlso: AH=F2h"NetWare",AH=E3h/SF=74h,AX=F217h/SF=74h

Format of NetWare "Change to Client Rights" request packet:
Offset  Size    Description     (Table 02219)
 00h    WORD    length of following data
 02h    BYTE    85h (subfunction "Change to Client Rights")
 03h    DWORD   queue object ID
 07h    DWORD   job number
SeeAlso: #01990
--------N-21F217SF86-------------------------
INT 21 - Novell NetWare v3.1+ - READ QUEUE SERVER CURRENT STATUS
        AX = F217h subfn 86h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02220)
        ES:DI -> reply buffer (see #02221)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=76h,AX=F217h/SF=77h,AX=F217h/SF=7Dh

Format of NetWare "Read Queue Server Current Status" request packet:
Offset  Size    Description     (Table 02220)
 00h    WORD    length of following data
 02h    BYTE    86h (subfunction "Read Queue Server Current Status")
 03h    DWORD   queue ID
 07h    DWORD   server ID
 0Bh    DWORD   connection ID
SeeAlso: #02221

Format of NetWare "Read Queue Server Current Status" request packet:
Offset  Size    Description     (Table 02221)
 00h 64 BYTEs   server status record
SeeAlso: #02220
--------N-21F217SF87-------------------------
INT 21 - Novell NetWare v3.1+ - GET QUEUE JOB FILE SIZE
        AX = F217h subfn 87h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02222)
        ES:DI -> reply buffer (see #02223)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=78h

Format of NetWare "Get Queue Job File Size" request packet:
Offset  Size    Description     (Table 02222)
 00h    WORD    length of following data
 02h    BYTE    87h (subfunction "Get Queue Job File Size")
        ???
SeeAlso: #02223

Format of NetWare "Get Queue Job File Size" request packet:
Offset  Size    Description     (Table 02223)
 00h    ???
SeeAlso: #02222
--------N-21F217SF96-------------------------
INT 21 - Novell NetWare - GET ACCOUNT STATUS
        AX = F217h subfn 96h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02003 at AH=E3h/SF=96h)
        ES:DI -> reply buffer (see #02224)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=96h,AX=F217h/SF=97h,AX=F217h/SF=98h

Format of NetWare "Get Account Status" reply packet:
Offset  Size    Description     (Table 02224)
 00h    DWORD   (big-endian) account balance
 04h    DWORD   (big-endian) credit limit
                signed number indicating lowest allowable account balance
 06h 120 BYTEs  reserved
 80h    DWORD   (big-endian) object ID, server 1
 84h    DWORD   (big-endian) hold amount, server 1
        ...
 F6h    DWORD   (big-endian) object ID, server 16
 FAh    DWORD   (big-endian) hold amount, server 16
Note:   the reply buffer lists the servers which have placed holds on a portion
          of the account balance, and the amount reserved by each
SeeAlso: #02003,#02004 at AH=E3h/SF=96h
--------N-21F217SF97-------------------------
INT 21 - Novell NetWare - SUBMIT ACCOUNT CHARGE
        AX = F217h subfn 97h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02005 at AH=E3h/SF=97h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=97h,AX=F217h/SF=96h,AX=F217h/SF=98h
--------N-21F217SF98-------------------------
INT 21 - Novell NetWare - SUBMIT ACCOUNT HOLD
        AX = F217h subfn 98h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02006 at AH=E3h/SF=98h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=98h,AX=F217h/SF=97h,AX=F217h/SF=99h
--------N-21F217SF99-------------------------
INT 21 - Novell NetWare - SUBMIT ACCOUNT NOTE
        AX = F217h subfn 99h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02008 at AH=E3h/SF=99h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=99h,AX=F217h/SF=96h,AX=F217h/SF=98h
--------N-21F217SFC8-------------------------
INT 21 - Novell NetWare - CHECK CONSOLE PRIVILEGES
        AX = F217h subfn C8h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02009 at AH=E3h/SF=C8h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=C8h,AX=F217h/SF=C9h,AX=F217h/SF=D1h
--------N-21F217SFC9-------------------------
INT 21 - Novell NetWare - GET FILE SERVER DESCRIPTION STRINGS
        AX = F217h subfn C9h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02010 at AH=E3h/SF=C9h)
        ES:DI -> reply buffer (see #02225)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=C9h,AX=F217h/SF=C8h,AX=F217h/SF=CAh

Format of NetWare "Get File Server Description Strings" reply packet:
Offset  Size    Description     (Table 02225)
 00h    var     ASCIZ name of company distributing this copy of NetWare
        var     ASCIZ version and revision
      9 BYTEs   ASCIZ revision date (mm/dd/yy)
        var     ASCIZ copyright notice
SeeAlso: #02010,#02011 at AH=E3h/SF=C9h
--------N-21F217SFCA-------------------------
INT 21 - Novell NetWare - SET FILE SERVER DATE AND TIME
        AX = F217h subfn CAh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02012 at AH=E3h/SF=CAh)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=CAh,AX=F217h/SF=C8h,AX=F217h/SF=CBh
--------N-21F217SFCB-------------------------
INT 21 - Novell NetWare - DISABLE FILE SERVER LOGIN
        AX = F217h subfn CBh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02013 at AH=E3h/SF=CBh)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=CBh,AX=F217h/SF=C8h,AX=F217h/SF=CCh
--------N-21F217SFCC-------------------------
INT 21 - Novell NetWare - ENABLE FILE SERVER LOGIN
        AX = F217h subfn CCh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02015 at AH=E3h/SF=CCh)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=CCh,AX=F217h/SF=C8h,AX=F217h/SF=CBh
--------N-21F217SFCD-------------------------
INT 21 - Novell NetWare - GET FILE SERVER LOGIN STATUS
        AX = F217h subfn CDh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02016 at AH=E3h/SF=CDh)
        ES:DI -> reply buffer (see #02226)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=CDh,AX=F217h/SF=CBh,AX=F217h/SF=CCh

Format of NetWare "Get File Server Login Status" reply packet:
Offset  Size    Description     (Table 02226)
 00h    BYTE    login state (00h disabled, 01h enabled)
SeeAlso: #02016,#02017 at AH=E3h/SF=CDh
--------N-21F217SFCE-------------------------
INT 21 - Novell NetWare - PURGE ALL ERASED FILES
        AX = F217h subfn CEh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02018 at AH=E3h/SF=CEh)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=CEh,AX=F244h
--------N-21F217SFCF-------------------------
INT 21 - Novell NetWare - DISABLE TRANSACTION TRACKING
        AX = F217h subfn CFh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02019 at AH=E3h/SF=CFh)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=CFh,AX=F217h/SF=D0h
--------N-21F217SFD0-------------------------
INT 21 - Novell NetWare - ENABLE TRANSACTION TRACKING
        AX = F217h subfn D0h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02021 at AH=E3h/SF=D0h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=D0h,AX=F217h/SF=CFh
--------N-21F217SFD1-------------------------
INT 21 - Novell NetWare - SEND CONSOLE BROADCAST
        AX = F217h subfn D1h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02022 at AH=E3h/SF=D1h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=D1h,AX=F217h/SF=D2h
--------N-21F217SFD2-------------------------
INT 21 - Novell NetWare v3+ - CLEAR CONNECTION NUMBER (LOGOUT STATION)
        AX = F217h subfn D2h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02023 at AH=E3h/SF=D2h)
        ES:DI ignored
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AH=F2h"Novell",AH=E3h/SF=D2h,AX=F217h/SF=D1h,AX=F217h/SF=FEh
--------N-21F217SFD3-------------------------
INT 21 - Novell NetWare - DOWN FILE SERVER
        AX = F217h subfn D3h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02026 at AH=E3h/SF=D3h)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=D3h,AX=F217h/SF=D2h
--------N-21F217SFD4-------------------------
INT 21 - Novell NetWare - GET FILE SYSTEM STATISTICS
        AX = F217h subfn D4h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02027 at AH=E3h/SF=D4h)
        ES:DI -> reply buffer (see #02227)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=D4h,AX=F217h/SF=D6h,AX=F217h/SF=D9h

Format of NetWare "Get File System Statistics" reply packet:
Offset  Size    Description     (Table 02227)
 00h    DWORD   clock ticks since system started
 04h    WORD    maximum open files set by configuration
 06h    WORD    maximum files open concurrently
 08h    WORD    current number of open files
 0Ah    DWORD   total files opened
 0Eh    DWORD   total file read requests
 12h    DWORD   total file write requests
 16h    WORD    current changed FATs
 18h    WORD    total changed FATs
 1Ah    WORD    number of FAT write errors
 1Ch    WORD    number of fatal FAT write errors
 1Eh    WORD    number of FAT scan errors
 20h    WORD    maximum concurrently-indexed files
 22h    WORD    current number of indexed files
 24h    WORD    number of attached indexed files
 26h    WORD    number of indexed files available
Note:   all fields are big-endian
SeeAlso: #02027,#02028 at AH=E3h/SF=D4h
--------N-21F217SFD5-------------------------
INT 21 - Novell NetWare - GET TRANSACTION TRACKING STATISTICS
        AX = F217h subfn D5h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02029 at AH=E3h/SF=D5h)
        ES:DI -> reply buffer (see #02228)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=D5h,AX=F217h/SF=D0h

Format of NetWare "Get Transaction Tracking Statistics" reply packet:
Offset  Size    Description     (Table 02228)
 00h    DWORD   (big-endian) clock ticks since system started
 04h    BYTE    transaction tracking supported if nonzero
                (all following fields are invalid if zero)
 05h    BYTE    transaction tracking enabled
 06h    WORD    (big-endian) transaction volume number
 08h    WORD    (big-endian) maximum simultaneous transactions configured
 0Ah    WORD    (big-endian) maximum simultaneous transactions since startup
 0Ch    WORD    (big-endian) current transactions in progress
 0Eh    DWORD   (big-endian) total transactions performed
 12h    DWORD   (big-endian) total write transactions
 16h    DWORD   (big-endian) total transactions backed out
 1Ah    WORD    (big-endian) number of unfilled backout requests
 1Ch    WORD    (big-endian) disk blocks used for transaction tracking
 1Eh    DWORD   (big-endian) blocks allocated for tracked-file FATs
 22h    DWORD   (big-endian) number of file size changes during a transaction
 26h    DWORD   (big-endian) number of file truncations during a transaction
 2Ah    BYTE    number of records following
 2Bh    Active Transaction Records [array]
        Offset  Size    Description
         00h    BYTE    logical connection number
         01h    BYTE    task number
SeeAlso: #02029,#02030 at AH=E3h/SF=D5h
--------N-21F217SFD6-------------------------
INT 21 - Novell NetWare - GET DISK CACHE STATISTICS
        AX = F217h subfn D6h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02031 at AH=E3h/SF=D6h)
        ES:DI -> reply buffer (see #02229)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=D6h,AX=F217h/SF=D5h,AX=F217h/SF=D8h

Format of NetWare "Get Disk Cache Statistics" reply packet:
Offset  Size    Description     (Table 02229)
 00h    DWORD   clock ticks since system started
 04h    WORD    number of cache buffers
 06h    WORD    size of cache buffer in bytes
 08h    WORD    number of dirty cache buffers
 0Ah    DWORD   number of cache read requests
 0Eh    DWORD   number of cache write requests
 12h    DWORD   number of cache hits
 16h    DWORD   number of cache misses
 1Ah    DWORD   number of physical read requests
 1Eh    DWORD   number of physical write requests
 22h    WORD    number of physical read errors
 24h    WORD    number of physical write errors
 26h    DWORD   cache get requests
 2Ah    DWORD   cache full write requests
 2Eh    DWORD   cache partial write requests
 32h    DWORD   background dirty writes
 36h    DWORD   background aged writes
 3Ah    DWORD   total cache writes
 3Eh    DWORD   number of cache allocations
 42h    WORD    thrashing count
 44h    WORD    number of times LRU block was dirty
 46h    WORD    number of reads on cache blocks not yet filled by writes
 48h    WORD    number of times a fragmented write occurred
 4Ah    WORD    number of cache hits on unavailable block
 4Ch    WORD    number of times a cache block was scrapped
Note:   all fields are big-endian
SeeAlso: #02031,#02032 at AH=E3h/SF=D6h
--------N-21F217SFD7-------------------------
INT 21 - Novell NetWare - GET DRIVE MAPPING TABLE
        AX = F217h subfn D7h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02033 at AH=E3h/SF=D7h)
        ES:DI -> reply buffer (see #02230)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AX=EF00h,AX=EF01h,AX=EF02h,AH=F2h"Novell",AH=E3h/SF=D7h

Format of NetWare "Get Drive Mapping Table" reply packet:
Offset  Size    Description     (Table 02230)
 00h    DWORD   (big-endian) clock tick elapsed since system started
 04h    BYTE    fault tolerance (SFT) level
 05h    BYTE    number of logical drives attached to server
 06h    BYTE    number of physical drives attached to server
 07h  5 BYTEs   disk channel types (00h none, 01h XT, 02h AT, 03h SCSI,
                  04h disk coprocessor drive, 32h-FFh value-added drive types)
 0Ch    WORD    (big-endian) number of outstanding controller commands
 0Eh 32 BYTEs   drive mapping table (FFh = no such drive)
 2Eh 32 BYTEs   drive mirror table (secondary physical drive, FFh = none)
 4Eh 32 BYTEs   dead mirror table (last drive mapped to, FFh if never mirrored)
 6Eh    BYTE    physical drive being remirrored (FFh = none)
 6Fh    BYTE    reserved
 70h    DWORD   (big-endian) remirrored block
 74h 60 BYTEs   SFT error table (internal error counters)
SeeAlso: #02033,#02034 at AH=E3h/SF=D7h
--------N-21F217SFD8-------------------------
INT 21 - Novell NetWare - GET PHYSICAL DISK STATISTICS
        AX = F217h subfn D8h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02035 at AH=E3h/SF=D8h)
        ES:DI -> reply buffer (see #02231)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=D8h,AX=F217h/SF=D9h

Format of NetWare "Get Physical Disk Statistics" request packet:
Offset  Size    Description     (Table 02231)
 00h    DWORD   (big-endian) clock ticks since system started
 04h    BYTE    physical disk channel
 05h    BYTE    flag: drive removable if nonzero
 06h    BYTE    physical drive type
 07h    BYTE    drive number within controller
 08h    BYTE    controller number
 09h    BYTE    controller type
 0Ah    DWORD   (big-endian) size of drive in 4K disk blocks
 0Eh    WORD    (big-endian) number of cylinders on drive
 10h    BYTE    number of heads
 11h    BYTE    number of sectors per track
 12h 64 BYTEs   ASCIZ drive make and model
 52h    WORD    (big-endian) number of I/O errors
 56h    DWORD   (big-endian) start of Hot Fix table
 58h    WORD    (big-endian) size of Hot Fix table
 5Ah    WORD    (big-endian) number of Hot Fix blocks available
 5Ch    BYTE    flag: Hot Fix disabled if nonzero
SeeAlso: #02035,#02036 at AH=E3h/SF=D8h
--------N-21F217SFD9-------------------------
INT 21 - Novell NetWare - GET DISK CHANNEL STATISTICS
        AX = F217h subfn D9h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02037 at AH=E3h/SF=D9h)
        ES:DI -> reply buffer (see #02232)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=D9h,AX=F217h/SF=D8h

Format of NetWare "Get Disk Channel Statistics" reply packet:
Offset  Size    Description     (Table 02232)
 00h    DWORD   (big-endian) clock ticks since system started
 04h    WORD    (big-endian) channel run state (see #02039)
 06h    WORD    (big-endian) channel synchronization state (see #02040)
 08h    BYTE    driver type
 09h    BYTE    major version of driver
 0Ah    BYTE    minor version of driver
 0Bh 65 BYTEs   ASCIZ driver description
 4Ch    WORD    (big-endian) first I/O address used
 4Eh    WORD    (big-endian) length of first I/O address
 50h    WORD    (big-endian) second I/O address used
 52h    WORD    (big-endian) length of second I/O address
 54h  3 BYTEs   first shared memory address
 57h  2 BYTEs   length of first shared memory address
 59h  3 BYTEs   second shared memory address
 5Ch  2 BYTEs   length of second shared memory address
 5Eh    BYTE    first interrupt number in-use flag
 5Fh    BYTE    first interrupt number used
 60h    BYTE    second interrupt number in-use flag
 61h    BYTE    second interrupt number used
 62h    BYTE    first DMA channel in-use flag
 63h    BYTE    first DMA channel used
 64h    BYTE    second DMA channel in-use flag
 65h    BYTE    second DMA channel used
 66h    BYTE    flags
 67h    BYTE    reserved
 68h 80 BYTEs   ASCIZ configuration description
SeeAlso: #02037,#02038 at AH=E3h/SF=D9h
--------N-21F217SFDA-------------------------
INT 21 - Novell NetWare v2.2+ - GET CONNECTION'S TASK INFORMATION
        AX = F217h subfn DAh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02041 at AH=E3h/SF=DAh)
        ES:DI -> reply buffer (see #02233)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=DAh,AX=F217h/SF=EAh

Format of NetWare "Get Connection's Task Information" reply packet:
Offset  Size    Description     (Table 02233)
 00h    BYTE    lock status of connection (see #02043)
 01h    var     Lock Status Information (see #02044)
 N      BYTE    number of records following
 N+1    Active Task Information Records [array]
        Offset  Size    Description
         00h    BYTE    task number (01h-FFh)
         01h    BYTE    task state
                        00h normal task
                        01h in TTS explicit transaction
                        02h in TTS implicit transaction
                        04h shared fileset lock active
SeeAlso: #02248,#02041,#02042 at AH=E3h/SF=DAh
--------N-21F217SFDB-------------------------
INT 21 - Novell NetWare v2.2+ - GET CONNECTION'S OPEN FILES (OLD)
        AX = F217h subfn DBh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02045 at AH=E3h/SF=DBh)
        ES:DI -> reply buffer (see #02234)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=DBh,AX=F217h/SF=EBh

Format of NetWare "Get Connection's Open Files (old)" reply packet:
Offset  Size    Description     (Table 02234)
 00h    WORD    next request record (place in "last record" field on next call)
                0000h if no more records
 02h    BYTE    number of records following
 03h    var     array of File Information Records (see #02047 at AH=E3h/SF=DBh)
SeeAlso: #02045,#02046 at AH=E3h/SF=DBh
--------N-21F217SFDC-------------------------
INT 21 - Novell NetWare v2.2+ - GET CONNECTIONS USING A FILE (OLD)
        AX = F217h subfn DCh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02050 at AH=E3h/SF=DCh)
        ES:DI -> reply buffer (see #02235)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=DCh,AX=F217h/SF=ECh

Format of NetWare "Get Connections Using A File (old)" reply packet:
Offset  Size    Description     (Table 02235)
 00h    WORD    (big-endian) count of tasks which have opened or logged file
 02h    WORD    (big-endian) count of tasks which have opened file
 04h    WORD    (big-endian) count of opens for reading
 06h    WORD    (big-endian) count of opens for writing
 08h    WORD    (big-endian) deny read count
 0Ah    WORD    (big-endian) deny write count
 0Ch    WORD    next request record (place in "last record" field on next call)
                0000h if no more records
 0Eh    BYTE    locked flag
                00h not locked exclusively
                else locked exclusively
 0Fh    BYTE    number of records following
 10h    var     array of File Usage Information Records
                  (see #02052 at AH=E3h/SF=DCh)
SeeAlso: #02050,#02051 at AH=E3h/SF=DCh
--------N-21F217SFDD-------------------------
INT 21 - Novell NetWare - GET PHYSICAL RECORD LOCKS BY CONNECTN AND FILE (OLD)
        AX = F217h subfn DDh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02054 at AH=E3h/SF=DDh)
        ES:DI -> reply buffer (see #02236)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=DDh,AX=F217h/SF=DEh,AX=F217h/SF=EDh

Format of NetWare "Get Phys Record Locks By Conn & File (old)" reply packet:
Offset  Size    Description     (Table 02236)
 00h    WORD    next request record (place in "last record" on next call)
                0000h if no more records
 02h    BYTE    number of physical record locks
 03h    BYTE    number of records following
 04h    var     array of Physical Record Lock Info records
                  (see #02056 at AH=E3h/SF=DDh)
SeeAlso: #02054,#02055 at AH=E3h/SF=DDh
--------N-21F217SFDE-------------------------
INT 21 - Novell NetWare - GET PHYSICAL RECORD LOCKS BY FILE (OLD)
        AX = F217h subfn DEh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02058 at AH=E3h/SF=DEh)
        ES:DI -> reply buffer (see #02237)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=DEh,AX=F217h/SF=EEh

Format of NetWare "Get Physical Record Locks By File (old)" reply packet:
Offset  Size    Description     (Table 02237)
 00h    WORD    next request record (place in "last record" on next call)
                0000h if no more records
 02h    BYTE    number of physical record locks
 03h    BYTE    number of records following
 04h    var     array of Physical Record Lock Info records (see #02060)
SeeAlso: #02058,#02059 at AH=E3h/SF=DEh
--------N-21F217SFDF-------------------------
INT 21 - Novell NetWare - GET LOGICAL RECORDS BY CONNECTION (OLD)
        AX = F217h subfn DFh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02061 at AH=E3h/SF=DFh)
        ES:DI -> reply buffer (see #02238)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=DFh,AX=F217h/SF=EFh

Format of NetWare "Get Logical Records By Connection (old)" reply packet:
Offset  Size    Description     (Table 02238)
 00h    WORD    next request record (place in "last record" field on next call)
                0000h if no more locked records
 02h    BYTE    number of records following
 03h    var     array of Logical Lock Information Records
                  (see #02063 at AH=E3h/SF=DFh)
SeeAlso: #02061,#02062 at AH=E3h/SF=DFh
--------N-21F217SFE0-------------------------
INT 21 - Novell NetWare - GET LOGICAL RECORD INFORMATION (OLD)
        AX = F217h subfn E0h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02064 at AH=E3h/SF=E0h)
        ES:DI -> reply buffer (see #02239)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=E0h,AX=F217h/SF=F0h

Format of NetWare "Get Logical Record Information (Old)" reply packet:
Offset  Size    Description     (Table 02239)
 00h    WORD    (big-endian) number of logical connections logging the record
 02h    WORD    (big-endian) number of logical connections with shareable lock
 04h    WORD    (big-endian) next request record (place in "last record" field
                  on next call)
 06h    BYTE    locked exclusively if nonzero
 07h    BYTE    number of records following
 08h    var     array of Task Information Records (see #02066 at AH=E3h/SF=E0h)
SeeAlso: #02064,#02065 at AH=E3h/SF=E0h
--------N-21F217SFE1-------------------------
INT 21 - Novell NetWare - GET CONNECTION'S SEMAPHORES (OLD)
        AX = F217h subfn E1h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02067 at AH=E3h/SF=E1h)
        ES:DI -> reply buffer (see #02240)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=E1h,AX=F217h/SF=F1h

Format of NetWare "Get Connection's Semaphores (old)" reply packet:
Offset  Size    Description     (Table 02240)
 00h    WORD    next request record (place in "last record" field on next call)
 02h    BYTE    number of records following
 03h    var     array of Semaphore Information Records
                  (see #02069 at AH=E3h/SF=E1h)
SeeAlso: #02067,#02068 at AH=E3h/SF=E1h
--------N-21F217SFE2-------------------------
INT 21 - Novell NetWare - GET SEMAPHORE INFORMATION (OLD)
        AX = F217h subfn E2h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02070 at AH=E3h/SF=E2h)
        ES:DI -> reply buffer (see #02241)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=E2h,AX=F217h/SF=F2h

Format of NetWare "Get Semaphore Information (old)" reply packet:
Offset  Size    Description     (Table 02241)
 00h    WORD    next request record (place in "last record" on next call)
                0000h if no more
 02h    WORD    (big-endian) number of logical connections opening semaphore
 04h    BYTE    semaphore value (-127 to 128)
 05h    BYTE    number of records following
 06h    var     array of Semaphore Information records (see #02072)
SeeAlso: #02070,#02071 at AH=E3h/SF=E2h
--------N-21F217SFE3-------------------------
INT 21 - Novell NetWare - GET LAN DRIVER'S CONFIGURATION INFORMATION
        AX = F217h subfn E3h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02073 at AH=E3h/SF=E3h)
        ES:DI -> reply buffer (see #02242)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=E3h,AX=F217h/SF=E7h,AX=F217h/SF=E8h

Format of NetWare "Get Lan Driver's Configuration Information" reply packet:
Offset  Size    Description     (Table 02242)
 00h  4 BYTEs   network number
 04h  6 BYTEs   node number
 0Ah    BYTE    LAN driver installed (00h no--remaining fields invalid)
 0Bh    BYTE    option number selected at configuration time
 0Ch 160 BYTEs  configuration text
                ASCIZ hardware type
                ASCIZ hardware settings
SeeAlso: #02073,#02074 at AH=E3h/SF=E3h
--------N-21F217SFE5-------------------------
INT 21 - Novell NetWare - GET CONNECTION'S USAGE STATISTICS
        AX = F217h subfn E5h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02075 at AH=E3h/SF=E5h)
        ES:DI -> reply buffer (see #02243)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=E5h,AX=F217h/SF=EAh

Format of NetWare "Get Connection's Usage Statistics" reply packet:
Offset  Size    Description     (Table 02243)
 00h    DWORD   (big-endian) clock ticks since server started
 04h  6 BYTEs   bytes read
 0Ah  6 BYTEs   bytes written
 10h    DWORD   (big-endian) total request packets
SeeAlso: #02075,#02076 at AH=E3h/SF=E5h
--------N-21F217SFE6-------------------------
INT 21 - Novell NetWare - GET OBJECT'S REMAINING DISK SPACE
        AX = F217h subfn E6h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02077 at AH=E3h/SF=E6h)
        ES:DI -> reply buffer (see #02244)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=E6h,AX=F216h/SF=20h,AX=F216h/SF=23h

Format of NetWare "Get Object's Remaining Disk Space" reply packet:
Offset  Size    Description     (Table 02244)
 00h    DWORD   (big-endian) clock ticks elapsed since server started
 04h    DWORD   (big-endian) object ID
 08h    DWORD   (big-endian) 4K disk blocks available to user
 0Ch    BYTE    restrictions (00h enforced, FFh not enforced)
SeeAlso: #02077,#02078 at AH=E3h/SF=E6h
--------N-21F217SFE7-------------------------
INT 21 - Novell NetWare - GET FILE SERVER LAN I/O STATISTICS
        AX = F217h subfn E7h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02079 at AH=E3h/SF=E7h)
        ES:DI -> reply buffer (see #02245)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=E7h,AX=F217h/SF=11h,AX=F217h/SF=F5h

Format of NetWare "Get File Server Lan I/O Statistics" reply packet:
Offset  Size    Description     (Table 02245)
 00h    DWORD   clock ticks since system started
 04h    WORD    total routing buffers
 06h    WORD    maximum routing buffers used
 08h    WORD    current routing buffers used
 0Ah    DWORD   total file service packets
 0Eh    WORD    number of file service packets buffered
 10h    WORD    number of invalid connection packets
 12h    WORD    packets with bad logical connection numbers
 14h    WORD    number of packets received during processing
 16h    WORD    number of requests reprocessed
 18h    WORD    packets with bad sequence numbers
 1Ah    WORD    number of duplicate replies sent
 1Ch    WORD    number of acknowledgements sent
 1Eh    WORD    number of packets with bad request types
 20h    WORD    requests to attach to ws for which a request is being processed
 22h    WORD    requests to attach from ws which is already attaching
 24h    WORD    number of forged detach requests
 26h    WORD    detach requests with bad connection number
 28h    WORD    requests to detach from ws for which requests pending
 2Ah    WORD    number of cancelled replies
 2Ch    WORD    packets discarded due to excessive hop count
 2Eh    WORD    packets discarded due to unknown net
 30h    WORD    incoming packets discarded for lack of DGroup buffer
 32h    WORD    outgoing packets discarded due to lack of buffer
 34h    WORD    received packets destined for B,C, or D side drivers
 36h    DWORD   number of NetBIOS packets propagated through net
 3Ah    DWORD   total number of non-file-service packets
 3Eh    DWORD   total number of routed packets
Note:   all fields are big-endian
SeeAlso: #02079,#02080 at AH=E3h/SF=E7h
--------N-21F217SFE8-------------------------
INT 21 - Novell NetWare - GET FILE SERVER MISC INFORMATION
        AX = F217h subfn E8h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02081 at AH=E3h/SF=E8h)
        ES:DI -> reply buffer (see #02246)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=E8h,AX=F217h/SF=11h,AX=F217h/SF=F5h

Format of NetWare "Get File Server Misc Information" reply packet:
Offset  Size    Description     (Table 02246)
 00h    DWORD   (big-endian) clock ticks since system started
 04h    BYTE    CPU type
                00h Motorola 68000
                01h Intel 8086, 8088, or V20
                02h Intel 80286+
 05h    BYTE    reserved
 06h    BYTE    number of service processes in server
 07h    BYTE    server utilization in percent
 08h    WORD    (big-endian) maximum bindery objects set by configuration
                0000h = unlimited
 0Ah    WORD    (big-endian) maximum number of bindery objects used
 0Ch    WORD    (big-endian) current number of bindery objects in use
 0Eh    WORD    (big-endian) total server memory in KB
 10h    WORD    (big-endian) wasted server memory in KB
                normally 0000h
 12h    WORD    number of records following (01h-03h)
 14h    var     array of Dynamic Memory Information records (see #02083)
SeeAlso: #02081,#02082 at AH=E3h/SF=E8h
--------N-21F217SFE9-------------------------
INT 21 - Novell NetWare - GET VOLUME INFORMATION
        AX = F217h subfn E9h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02084 at AH=E3h/SF=E9h)
        ES:DI -> reply buffer (see #02247)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AH=E3h/SF=E9h,AX=F212h,AX=F216h/SF=15h

Format of NetWare "Get Volume Information" reply packet:
Offset  Size    Description     (Table 02247)
 00h    DWORD   (big-endian) elapsed system time
 04h    BYTE    volume number
 05h    BYTE    logical drive number
 06h    WORD    (big-endian) sectors per block
 08h    WORD    (big-endian) starting block
 0Ah    WORD    (big-endian) total blocks on volume
 0Ch    WORD    (big-endian) blocks available on volume
 0Eh    WORD    (big-endian) total directory slots
 10h    WORD    (big-endian) directory slots available
 12h    WORD    (big-endian) maximum directory entries actually used
 14h    BYTE    flag: volume hashed if nonzero
 15h    BYTE    flag: volume cached if nonzero
 16h    BYTE    flag: volume removable if nonzero
 17h    BYTE    flag: volume mounted if nonzero
 18h 16 BYTEs   NUL-padded volume name
SeeAlso: #02084,#02085 at AH=E3h/SF=E9h
--------N-21F217SFEA-------------------------
INT 21 - Novell NetWare v3.11+ - GET CONNECTION'S TASK INFORMATION
        AX = F217h subfn EAh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02248)
        ES:DI -> reply buffer (see #02233)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=DAh

Format of NetWare "Get Connection's Task Information" request packet:
Offset  Size    Description     (Table 02248)
 00h    WORD    length of following data
 02h    BYTE    EAh (subfunction "Get Connection's Task Information")
 03h    WORD    connection number
SeeAlso: #02233,#02041 at AH=E3h/SF=DAh
--------N-21F217SFEB-------------------------
INT 21 - Novell NetWare v3+ - GET CONNECTION'S OPEN FILES
        AX = F217h subfn EBh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02249)
        ES:DI -> reply buffer (see #02250)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AH=F2h"Novell",AX=F217h/SF=DBh

Format of NetWare "Get Connection's Open Files" request buffer:
Offset  Size    Description     (Table 02249)
 00h    WORD    0005h (length of following data)
 02h    BYTE    EBh (subfunction "Get Connection's Open Files")
 03h    WORD    target connection number
 05h    WORD    last record seen (set to 0000h for first call)
Note:   connection numbers greater than the maximum supported by the server
          can cause ABENDs
SeeAlso: #02250

Format of NetWare "Get Connection's Open Files" reply buffer:
Offset  Size    Description     (Table 02250)
 00h    WORD    next request record
 02h    WORD    number of records returned (max 28)
 04h 29N BYTEs  array of connection records (see #02251)
SeeAlso: #02249

Format of NetWare connection record:
Offset  Size    Description     (Table 02251)
 00h    WORD    task number
 02h    BYTE    lock type
 03h    BYTE    access control
 04h    BYTE    lock flag
 05h    BYTE    volume number
 06h    DWORD   parent directory entry number
 0Ah    DWORD   directory entry number
 0Eh    BYTE    fork count
 0Fh    BYTE    data stream type / name space (see #02387)
 10h    BYTE    file name length
 11h 12 BYTEs   file name
SeeAlso: #02250
--------N-21F217SFEC-------------------------
INT 21 - Novell NetWare v3+ - GET CONNECTIONS USING A FILE
        AX = F217h subfn ECh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02252)
        ES:DI -> reply buffer (see #02253)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AH=F2h"Novell",AX=F217h/SF=DCh

Format of NetWare "Get Connections Using a File" request buffer:
Offset  Size    Description     (Table 02252)
 00h    WORD    0009h (length of following data)
 02h    BYTE    ECh (subfunction "Get Connections Using a File")
 03h    BYTE    data stream type
 04h    BYTE    volume number
 05h    DWORD   directory entry number
 09h    WORD    last record seen (0000h for first call)
SeeAlso: #02253

Format of NetWare "Get Connections Using a File" reply buffer:
Offset  Size    Description     (Table 02253)
 00h    WORD    next request record
 02h    WORD    use count
 04h    WORD    open count
 06h    WORD    number of times open for reading
 08h    WORD    number of times open for writing
 0Ah    WORD    Deny Read count
 0Ch    WORD    Deny Write count
 0Eh    BYTE    flag: locked
 0Fh    BYTE    fork count
 10h    WORD    number of records returned (max 70)
 12h 7N BYTEs   returned records (see #02254)
SeeAlso: #02252

Format of returned record:
Offset  Size    Description     (Table 02254)
 00h    WORD    connection number
 02h    WORD    task number
 04h    BYTE    lock type
 05h    BYTE    access flag
 06h    BYTE    lock flag
SeeAlso: #02253
--------N-21F217SFED-------------------------
INT 21 - Novell NetWare v3+ - GET PHYSICAL RECORD LOCKS BY CONNECTION AND FILE
        AX = F217h subfn EDh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02255)
        ES:DI -> reply buffer (see #02256)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=DDh,AX=F217h/SF=EEh

Format of NetWare "Get Phys Record Locks By Conn And File" request packet:
Offset  Size    Description     (Table 02255)
 00h    WORD    length of following data
 02h    BYTE    EDh (subfunction "Get Physical Record Locks By Connection
                  And File")
 03h    WORD    target connection number
 05h    BYTE    last record seen (set to 00h before first call)
 06h    BYTE    volume number
 07h    DWORD   directory entry number
 0Bh  N BYTEs   filename
SeeAlso: #02256

Format of NetWare "Get Physical Record Locks By Connect And File" reply packet:
Offset  Size    Description     (Table 02256)
 00h    WORD    next record (place in last-seen field on next call)
 02h    WORD    number of locks returned
 04h 11N BYTEs  lock records
                Offset  Size    Description
                 00h    WORD    (big-endian) task number
                 02h    BYTE    lock status
                 03h    DWORD   (big-endian) record start offset
                 07h    DWORD   (big-endian) record end offset
SeeAlso: #02255
--------N-21F217SFEE-------------------------
INT 21 - Novell NetWare v3+ - GET PHYSICAL RECORD LOCKS BY FILE
        AX = F217h subfn EEh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02257)
        ES:DI -> reply buffer (see #02258)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AH=F2h"Novell",AX=F217h/SF=DEh

Format of NetWare "Get Physical Record Locks by File" request buffer:
Offset  Size    Description     (Table 02257)
 00h    WORD    0009h (length of following data)
 02h    BYTE    EEh (subfunction "Get Physical Record Locks by File")
 03h    BYTE    data stream number
 04h    BYTE    volume number
 05h    DWORD   directory entry number
 09h    WORD    last record seen (0000h for first call)
SeeAlso: #02258

Format of NetWare "Get Physical Record Locks by File" reply buffer:
Offset  Size    Description     (Table 02258)
 00h    WORD    next request record
 02h    WORD    number of locks
 04h 17N BYTEs  array of lock records, one per lock (see #02259)
SeeAlso: #02257

Format of NetWare lock record:
Offset  Size    Description     (Table 02259)
 00h    WORD    logged count
 02h    WORD    number of shareable locks
 04h    DWORD   start offset of record
 08h    DWORD   end offset of record
 0Ch    WORD    logical connection number
 0Eh    WORD    task number
 10h    BYTE    lock type
SeeAlso: #02258
--------N-21F217SFEF-------------------------
INT 21 - Novell NetWare v3+ - GET LOGICAL RECORDS BY CONNECTION
        AX = F217h subfn EFh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02260)
        ES:DI -> reply buffer (see #02261)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=DFh

Format of NetWare "Get Logical Records By Connection" request packet:
Offset  Size    Description     (Table 02260)
 00h    WORD    length of following data
 02h    BYTE    EFh (subfunction "Get Logical Records By Connection")
 03h    WORD    target connection number
 05h    WORD    last record seen (set to 0000h before first call)
SeeAlso: #02261

Format of NetWare "Get Logical Records By Connection" request packet:
Offset  Size    Description     (Table 02261)
 00h    WORD    next record (place in last-seen field on next call)
 02h    WORD    number of records returned
 04h            Logical Lock Information records (see #02063 at AH=E3h/SF=DFh)
SeeAlso: #02260
--------N-21F217SFF0-------------------------
INT 21 - Novell NetWare v3+ - GET LOGICAL RECORD INFORMATION
        AX = F217h subfn F0h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02262)
        ES:DI -> reply buffer (see #02263)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=E0h,AX=F217h/SF=EFh

Format of NetWare "Get Logical Record Information" request packet:
Offset  Size    Description     (Table 02262)
 00h    WORD    length of following data
 02h    BYTE    F0h (subfunction "Get Logical Record Information")
 03h    WORD    last record seen
 05h    BYTE    length of logical record name
 06h  N BYTEs   logical record name (case-sensitive)
SeeAlso: #02263

Format of NetWare "Get Logical Record Information" request packet:
Offset  Size    Description     (Table 02263)
 00h    WORD    number of connections logging record
 02h    WORD    number of shareable locks
 04h    BYTE    flag: locked exclusively if nonzero
 05h    WORD    next request record (place in last-seen field on next call)
 07h    BYTE    number of records returned
 08h            logical record information records [array]
                Offset  Size    Description
                 00h    WORD    connection number
                 02h    BYTE    task number
                 03h    BYTE    lock status
SeeAlso: #02262
--------N-21F217SFF1-------------------------
INT 21 - Novell NetWare v3+ - GET CONNECTION'S SEMAPHORES
        AX = F217h subfn F1h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02264)
        ES:DI -> reply buffer (see #02265)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=E1h

Format of NetWare "Get Connection's Semaphores" request packet:
Offset  Size    Description     (Table 02264)
 00h    WORD    length of following data
 02h    BYTE    F1h (subfunction "Get Connection's Semaphores")
 03h    WORD    connection number
 05h    WORD    last record seen (set to 0000h before first call)
SeeAlso: #02265

Format of NetWare "Get Connection's Semaphores" reply packet:
Offset  Size    Description     (Table 02265)
 00h    WORD    next record (place in last-seen field on next call)
 02h    WORD    number of semaphores returned
 04h    BYTEs   semaphore information records [packed array] (see #02266)
SeeAlso: #02264

Format of NetWare semaphore information record:
Offset  Size    Description     (Table 02266)
 00h    WORD    semaphore's current value
 02h    WORD    number of connections using semaphore
 04h    WORD    task number
 06h    BYTE    length of semaphore's name
 07h  N BYTEs   semaphore name
SeeAlso: #02265
--------N-21F217SFF2-------------------------
INT 21 - Novell NetWare v3+ - GET SEMAPHORE INFORMATION
        AX = F217h subfn F2h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02267)
        ES:DI -> reply buffer (see #02268)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AH=F2h"Novell",AX=F217h/SF=E2h

Format of NetWare "Get Semaphore Information" request buffer:
Offset  Size    Description     (Table 02267)
 00h    WORD    length of following data (max 84h)
 02h    BYTE    F2h (subfunction "Get Semaphore Information")
 03h    WORD    last record seen (0000h on first call)
 05h    BYTE    length of semaphore name (max 128)
 06h  N BYTEs   semaphore name
SeeAlso: #02268

Format of NetWare "Get Semaphore Information" reply buffer:
Offset  Size    Description     (Table 02268)
 00h    WORD    next request record
 02h    WORD    open count
 04h    BYTE    value of semaphore
 05h    WORD    number of records returned
 07h 2N WORDs   list of logical connection number/task number pairs
SeeAlso: #02267
--------N-21F217SFF3-------------------------
INT 21 - Novell NetWare v3+ - MAP DIRECTORY NUMBER TO PATH
        AX = F217h subfn F3h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02269)
        ES:DI -> reply buffer (see #02270)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F217h/SF=F4h

Format of NetWare "Map Directory Number to Path" request buffer:
Offset  Size    Description     (Table 02269)
 00h    WORD    0007h (length of following data)
 02h    BYTE    F3h (subfunction "Map Directory Number to Path")
 03h    BYTE    volume number
 04h    DWORD   directory entry number
 08h    BYTE    name space type
SeeAlso: #02270

Format of NetWare "Map Directory Number to Path" reply buffer:
Offset  Size    Description     (Table 02270)
 00h    BYTE    directory path length
 01h  N BYTEs   directory path (NetWare style, separated by length descriptors
                  rather than slashes or backslashes)
SeeAlso: #02269
--------N-21F217SFF4-------------------------
INT 21 - Novell NetWare v3+ - CONVERT PATH TO DIRECTORY ENTRY
        AX = F217h subfn F4h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02271)
        ES:DI -> reply buffer (see #02272)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F217h/SF=F3h

Format of NetWare "Convert Path to Directory Entry" request packet:
Offset  Size    Description     (Table 02271)
 00h    WORD    length of following data
 02h    BYTE    F4h (subfunction "Convert Path to Directory Entry")
 03h    BYTE    directory handle or 00h for none
 04h    BYTE    length of directory path
 05h  N BYTEs   directory path (must be fully qualified if no handle specified)
SeeAlso: #02272

Format of NetWare "Convert Path to Directory Entry" reply packet:
Offset  Size    Description     (Table 02272)
 00h    BYTE    volume number
 01h    DWORD   directory entry number
SeeAlso: #02271
--------N-21F217SFF5-------------------------
INT 21 - Novell NetWare - GET FILE SERVER EXTENDED MISC INFORMATION
        AX = F217h subfn F5h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02273)
        ES:DI -> reply buffer (see #02274)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=11h,AX=F217h/SF=C9h,AX=F217h/SF=E8h

Format of NetWare "Get File Server Extended Misc Information" request packet:
Offset  Size    Description     (Table 02273)
 00h    WORD    length of following data
 02h    BYTE    F5h (subfunction "Get File Server Extended Misc Information")
 03h    BYTE    length of reply buffer
SeeAlso: #02274

Format of NetWare "Get File Server Extended Misc Information" reply packet:
Offset  Size    Description     (Table 02274)
 00h    DWORD   system interval marker
                (up-time in clock ticks, wraps to 0 on reaching FFFFFFFFh)
 04h    BYTE    processor type
                00h Motorola 680x0
                01h Intel 8088/8086
                02h 80286
 05h    BYTE    reserved for future use
 06h    BYTE    number of service processes
 07h    BYTE    server utilization percentage
 08h    WORD    maximum bindery objects set by configuration
 0Ah    WORD    actual maximum bindery objects
 0Ch    WORD    current number of bindery objects
 0Eh    WORD    (big-endian) total server memory
 10h    WORD    (big-endian) wasted server memory
 12h    WORD    (big-endian) number of dynamic memory areas
 14h    DWORD   (big-endian) total space in dynamic memory area
 18h    DWORD   maximum dynamic space used
 1Ch    DWORD   dynamic space currently used
SeeAlso: #02273
--------N-21F217SFF6-------------------------
INT 21 - Novell NetWare - GET VOLUME EXTENDED INFORMATION
        AX = F217h subfn F6h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02275)
        ES:DI -> reply buffer (see #02276)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=E8h

Format of NetWare "Get Volume Extended Information" request packet:
Offset  Size    Description     (Table 02275)
 00h    WORD    length of following data
 02h    BYTE    F6h (subfunction "Get Volume Extended Information")
 03h    BYTE    volume number
 04h    BYTE    size of reply buffer
SeeAlso: #02276

Format of NetWare "Get Volume Extended Information" reply packet:
Offset  Size    Description     (Table 02276)
 00h    DWORD   system interval
                (up-time in clock ticks, wraps to 0 on reaching FFFFFFFFh)
 04h    BYTE    volume number
 05h    BYTE    logical drive number
 06h    WORD    number of 512-byte sectors per disk block
 08h    DWORD   starting block number of volume
 0Ch    WORD    total number of disk blocks
 0Eh    WORD    number of free disk blocks
 10h    WORD    total number of directory entries
 12h    WORD    number of available directory entries
 14h    WORD    maximum directory entries ever used
 16h    BYTE    flag: volume is hashed in memory if nonzero
 17h    BYTE    flag: volume is cached if nonzero
 18h    BYTE    flag: volume is removable if nonzero
 19h    BYTE    flag: volume is mounted if nonzero
 1Ah 16 BYTEs   volume name (null-padded)
SeeAlso: #02275
--------N-21F217SFFE-------------------------
INT 21 - Novell NetWare v4 - CLEAR CONNECTION NUMBER GREATER THAN 250
        AX = F217h subfn FEh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02277)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=E3h/SF=D2h,AX=F217h/SF=D2h

Format of NetWare "Clear Connection Number" request buffer:
Offset  Size    Description     (Table 02277)
 00h    WORD    length of following data
 02h    BYTE    FEh (subfunction "Clear Connection Number")
 03h    DWORD   connection number
SeeAlso: #02023
--------N-21F21B-----------------------------
INT 21 - Novell NetWare - LOCK PHYSICAL RECORD SET (OLD)
        AX = F21Bh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02480 at AX=F26Eh)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F26Eh,AH=C2h"NetWare"
--------N-21F21E-----------------------------
INT 21 - Novell NetWare - CLEAR PHYSICAL RECORD
        AX = F21Eh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02278)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=5Ch,AH=BEh"NetWare",AH=F2h"Novell",AX=F20Bh,AX=F21Fh

Format of NetWare "Clear Physical Record" request packet:
Offset  Size    Description     (Table 02278)
 00h    BYTE    reserved for future use
 01h  6 BYTEs   NetWare file handle
 07h    DWORD   starting offset of locked region
 0Bh    DWORD   length of locked region
SeeAlso: #02279
--------N-21F21F-----------------------------
INT 21 - Novell NetWare - CLEAR PHYSICAL RECORD SET
        AX = F21Fh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02279)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=5Ch,AH=C4h"NetWare",AH=F2h"Novell",AX=F20Eh,AX=F21Eh

Format of NetWare "Clear Physical Record Set" request packet:
Offset  Size    Description     (Table 02279)
 00h    BYTE    lock flag (00h = not locked)
SeeAlso: #02278
--------N-21F220SF00-------------------------
INT 21 - Novell NetWare - OPEN SEMAPHORE (OLD)
        AX = F220h subfn 00h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02280)
        ES:DI -> reply buffer (see #02281)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=C500h,AX=F220h/SF=01h,AX=F220h/SF=03h

Format of NetWare "Open Semaphore (old)" request packet:
Offset  Size    Description     (Table 02280)
 00h    BYTE    00h (subfunction "Open Semaphore (old)")
 01h    BYTE    initial value of semaphore ( >= 0)
 02h    BYTE    length of semaphore's name (max 512)
 03h  N BYTEs   semaphore name
SeeAlso: #02281,#02282

Format of NetWare "Open Semaphore (old)" reply packet:
Offset  Size    Description     (Table 02281)
 00h    DWORD   semaphore handle
 04h    BYTE    number of processes using semaphore (including caller)
SeeAlso: #02280,#02283
--------N-21F220SF01-------------------------
INT 21 - Novell NetWare - EXAMINE SEMAPHORE (OLD)
        AX = F220h subfn 01h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02282)
        ES:DI -> reply buffer (see #02283)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=C501h,AX=F220h/SF=00h,AX=F220h/SF=03h

Format of NetWare "Close Semaphore (old)" request packet:
Offset  Size    Description     (Table 02282)
 00h    BYTE    01h (subfunction "Examine Semaphore (old)")
 01h    DWORD   semaphore handle
SeeAlso: #02283,#02280

Format of NetWare "Close Semaphore (old)" request packet:
Offset  Size    Description     (Table 02283)
 00h    BYTE    current semaphore value
 01h    BYTE    number of processes using semaphore (including caller)
SeeAlso: #02282,#02281
--------N-21F220SF02-------------------------
INT 21 - Novell NetWare - WAIT ON SEMAPHORE (OLD)
        AX = F220h subfn 02h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02284)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=C502h,AX=F220h/SF=00h,AX=F220h/SF=03h

Format of NetWare "Wait on Semaphore (old)" request packet:
Offset  Size    Description     (Table 02284)
 00h    BYTE    02h (subfunction "Wait on Semaphore (old)")
 01h    DWORD   semaphore handle
 05h    WORD    timeout in 1/18s (0000h = return immediately)
SeeAlso: #02282,#02285
--------N-21F220SF03-------------------------
INT 21 - Novell NetWare - SIGNAL SEMAPHORE (OLD)
        AX = F220h subfn 03h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02285)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=C503h,AX=F220h/SF=02h,AX=F220h/SF=04h

Format of NetWare "Signal Semaphore (old)" request packet:
Offset  Size    Description     (Table 02285)
 00h    BYTE    03h (subfunction "Signal Semaphore (old)")
 01h    DWORD   semaphore handle
SeeAlso: #02284,#02286
--------N-21F220SF04-------------------------
INT 21 - Novell NetWare - CLOSE SEMAPHORE (OLD)
        AX = F220h subfn 04h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02286)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=C504h,AX=F220h/SF=00h,AX=F220h/SF=01h
SeeAlso: AX=F26Fh/SF=01h

Format of NetWare "Close Semaphore (old)" request packet:
Offset  Size    Description     (Table 02286)
 00h    BYTE    04h (subfunction "Close Semaphore (old)")
 01h    DWORD   semaphore handle
SeeAlso: #02285,#02483
--------N-21F222SF00-------------------------
INT 21 - Novell NetWare - TTS IS AVAILABLE
        AX = F222h subfn 00h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02287)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=C702h,AX=F222h/SF=01h,AX=F222h/SF=05h

Format of NetWare "TTS Is Available" request packet:
Offset  Size    Description     (Table 02287)
 00h    BYTE    00h (subfunction "TTS Is Available")
--------N-21F222SF01-------------------------
INT 21 - Novell NetWare - TTS BEGIN TRANSACTION
        AX = F222h subfn 01h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02288)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=C700h,AX=F222h/SF=02h,AX=F222h/SF=03h

Format of NetWare "TTS Begin Transaction" request packet:
Offset  Size    Description     (Table 02288)
 00h    BYTE    01h (subfunction "TTS Begin Transaction")
SeeAlso: #02289,#02291
--------N-21F222SF02-------------------------
INT 21 - Novell NetWare - TTS END TRANSACTION
        AX = F222h subfn 02h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02289)
        ES:DI -> reply buffer (see #02290)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=C701h,AX=F222h/SF=01h,AX=F222h/SF=04h

Format of NetWare "TTS End Transaction" request packet:
Offset  Size    Description     (Table 02289)
 00h    BYTE    02h (subfunction "TTS End Transaction")
SeeAlso: #02290,#02288

Format of NetWare "TTS End Transaction" reply packet:
Offset  Size    Description     (Table 02290)
 00h    DWORD   transaction number
SeeAlso: #02289,#02292
--------N-21F222SF03-------------------------
INT 21 - Novell NetWare - TTS ABORT TRANSACTION
        AX = F222h subfn 03h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02291)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=C703h,AX=F222h/SF=01h,AX=F222h/SF=02h
SeeAlso: AX=F220h/SF=04h

Format of NetWare "TTS Abort Transaction" request packet:
Offset  Size    Description     (Table 02291)
 00h    BYTE    03h (subfunction "TTS Abort Transaction")
SeeAlso: #02288,#02289
--------N-21F222SF04-------------------------
INT 21 - Novell NetWare - TTS TRANSACTION STATUS
        AX = F222h subfn 04h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02292)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=C704h,AX=F222h/SF=02h,AX=F222h/SF=03h

Format of NetWare "TTS Transaction Status" request packet:
Offset  Size    Description     (Table 02292)
 00h    BYTE    04h (subfunction "TTS Transaction Status")
 01h    DWORD   transaction number
SeeAlso: #02289,#02290
--------N-21F222SF05-------------------------
INT 21 - Novell NetWare - TTS GET APPLICATION THRESHOLDS
        AX = F222h subfn 05h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02293)
        ES:DI -> reply buffer (see #02294)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=C705h,AX=F222h/SF=06h,AX=F222h/SF=07h

Format of NetWare "TTS Get Application Thresholds" request packet:
Offset  Size    Description     (Table 02293)
 00h    BYTE    05h (subfunction "TTS Get Application Thresholds")
SeeAlso: #02294,#02295

Format of NetWare "TTS Get Application Thresholds" request packet:
Offset  Size    Description     (Table 02294)
 00h    BYTE    logical lock threshold
 01h    BYTE    physical lock threshold
SeeAlso: #02293,#02295
--------N-21F222SF06-------------------------
INT 21 - Novell NetWare - TTS SET APPLICATION THRESHOLDS
        AX = F222h subfn 06h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02295)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=C706h,AX=F222h/SF=05h,AX=F222h/SF=08h

Format of NetWare "TTS Set Application Thresholds" request packet:
Offset  Size    Description     (Table 02295)
 00h    BYTE    06h (subfunction "TTS Set Application Thresholds")
 01h    BYTE    logical lock threshold before implicit transaction started
 02h    BYTE    physical lock threshold before implicit transaction started
SeeAlso: #02294,#02298
--------N-21F222SF07-------------------------
INT 21 - Novell NetWare - TTS GET WORKSTATION THRESHOLDS
        AX = F222h subfn 07h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02296)
        ES:DI -> reply buffer (see #02297)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=C707h,AX=F222h/SF=05h,AX=F222h/SF=08h

Format of NetWare "TTS Get Workstation Thresholds" request packet:
Offset  Size    Description     (Table 02296)
 00h    BYTE    07h (subfunction "TTS Get Workstation Thresholds")
SeeAlso: #02297

Format of NetWare "TTS Get Workstation Thresholds" reply packet:
Offset  Size    Description     (Table 02297)
 00h    BYTE    logical lock threshold
 01h    BYTE    physical lock threshold
SeeAlso: #02296
--------N-21F222SF08-------------------------
INT 21 - Novell NetWare - TTS SET WORKSTATION THRESHOLDS
        AX = F222h subfn 08h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02298)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=C708h,AX=F222h/SF=06h,AX=F222h/SF=07h

Format of NetWare "TTS Set Workstation Thresholds" request packet:
Offset  Size    Description     (Table 02298)
 00h    BYTE    08h (subfunction "TTS Set Workstation Thresholds")
 01h    BYTE    logical lock threshold before implicit transaction started
 02h    BYTE    physical lock threshold before implicit transaction started
SeeAlso: #02295
--------N-21F222SF09-------------------------
INT 21 - Novell NetWare - TTS GET CONTROL FLAGS
        AX = F222h subfn 09h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02299)
        ES:DI -> reply buffer (see #02300)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=C702h,AX=F222h/SF=07h,AX=F222h/SF=0Ah

Format of NetWare "TTS Get Transaction Bits" request packet:
Offset  Size    Description     (Table 02299)
 00h    BYTE    09h (subfunction "TTS Get Transaction Bits")
SeeAlso: #02300

Format of NetWare "TTS Get Transaction Bits" reply packet:
Offset  Size    Description     (Table 02300)
 00h    BYTE    TTS control flags
                bit 0: forced (automatic) record locking enabled
                bits 1-7: reserved
SeeAlso: #02299
--------N-21F222SF0A-------------------------
INT 21 - Novell NetWare - TTS SET CONTROL FLAGS
        AX = F222h subfn 0Ah
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02301)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=C702h,AX=F222h/SF=08h,AX=F222h/SF=09h

Format of NetWare "TTS Set Transaction Bits" request packet:
Offset  Size    Description     (Table 02301)
 00h    BYTE    0Ah (subfunction "TTS Set Transaction Bits")
 01h    BYTE    TTS control flags
                bit 0: forced (automatic) record locking enabled
                bits 1-7: reserved
--------N-21F223SF01-------------------------
INT 21 - Novell NetWare v2+ - AFP CREATE DIRECTORY
        AX = F223h subfn 01h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02302)
        ES:DI -> reply buffer (see #02303)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=02h,AX=F223h/SF=0Dh

Format of NetWare "AFP Create Directory" request packet:
Offset  Size    Description     (Table 02302)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    01h (subfunction "AFP Create Directory")
 03h    BYTE    volume number
 04h    DWORD   AFP entry ID
 08h    BYTE    reserved for future use
 09h 32 BYTEs   Finder information
 29h    BYTE    path length
 2Ah  N BYTEs   AFP-style directory pathname (relative to AFP entry ID)
SeeAlso: #02303,#02304,#02330

Format of NetWare "AFP Create Directory" reply packet:
Offset  Size    Description     (Table 02303)
 00h    DWORD   new directory ID
SeeAlso: #02302,#02331
--------N-21F223SF02-------------------------
INT 21 - Novell NetWare v2+ - AFP CREATE FILE
        AX = F223h subfn 02h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02304)
        ES:DI -> reply buffer (see #02305)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=02h,AX=F223h/SF=03h,AX=F223h/SF=0Dh

Format of NetWare "AFP Create File" request packet:
Offset  Size    Description     (Table 02304)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    01h (subfunction "AFP Create Directory")
 03h    BYTE    volume number
 04h    DWORD   AFP entry ID
 08h    BYTE    flag: delete existing file? (00h no, 01h yes)
 09h 32 BYTEs   Finder information
 29h    BYTE    path length
 2Ah  N BYTEs   AFP-style directory pathname (relative to AFP entry ID)
SeeAlso: #02302,#02305,#02306,#02332

Format of NetWare "AFP Create File" reply packet:
Offset  Size    Description     (Table 02305)
 00h    DWORD   new file's AFP entry ID
SeeAlso: #02304,#02333
--------N-21F223SF03-------------------------
INT 21 - Novell NetWare v2+ - AFP DELETE FILE
        AX = F223h subfn 03h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02306)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
Note:   directories may be deleted if they are empty
SeeAlso: AH=F2h"Novell",AX=F223h/SF=02h,AX=F223h/SF=0Dh

Format of NetWare "AFP Delete File" request packet:
Offset  Size    Description     (Table 02306)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    03h (subfunction "AFP Delete File")
 03h    BYTE    volume number
 04h    DWORD   AFP entry ID
 08h    BYTE    path length
 09h  N BYTEs   AFP-style pathname (relative to AFP entry ID)
SeeAlso: #02304
--------N-21F223SF04-------------------------
INT 21 - Novell NetWare v2+ - AFP GET ENTRY ID FROM FILENAME
        AX = F223h subfn 04h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02307)
        ES:DI -> reply buffer (see #02308)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=06h,AX=F223h/SF=0Ch,AX=F223h/SF=12h

Format of NetWare "AFP Get Entry ID from Name" request packet:
Offset  Size    Description     (Table 02307)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    04h (subfunction "AFP Get Entry ID from Name")
 03h    BYTE    volume number
 04h    DWORD   AFP entry ID
 08h    BYTE    path length
 09h  N BYTEs   AFP-style pathname (relative to AFP entry ID)
SeeAlso: #02308,#02314

Format of NetWare "AFP Get Entry ID from Name" reply packet:
Offset  Size    Description     (Table 02308)
 00h    DWORD   AFP entry ID corresponding to specified file/directory
SeeAlso: #02307,#02315
--------N-21F223SF05-------------------------
INT 21 - Novell NetWare v2+ - AFP GET FILE INFORMATION
        AX = F223h subfn 05h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02309)
        ES:DI -> reply buffer (see #02311)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=04h,AX=F223h/SF=09h,AX=F223h/SF=13h

Format of NetWare "AFP Get File Information" request packet:
Offset  Size    Description     (Table 02309)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    05h (subfunction "AFP Get File Information")
 03h    BYTE    volume number
 04h    DWORD   AFP entry ID
 08h    WORD    request bitmap
 0Ah    BYTE    path length
 0Bh  N BYTEs   AFP-style pathname (relative to AFP entry ID)
SeeAlso: #02311

Bitfields for NetWare AFP request bitmap:
Bit(s)  Description     (Table 02310)
 0      return AFP entry ID
 1      return data fork length
 2      return resource fork length
 3      return number of contained files/subdirectories
 4      return owner ID
 5      return short name
 6      return access rights
 7      ??? (unused?)
 8      return attributes
 9      return parent directory ID
 10     return creation date
 11     return last-access date
 12     return last-modified date and time
 13     return last-backup date and time
 14     return Finder information
 15     return long name
SeeAlso: #02309,#02336,#02337

Format of NetWare "AFP Get File Information" reply packet:
Offset  Size    Description     (Table 02311)
 00h    DWORD   AFP entry ID for specified file
 04h    DWORD   AFP entry ID for specified file's parent directory
 08h    WORD    directory/file attributes (see #02312)
 0Ah    DWORD   length of data fork
 0Eh    DWORD   length of resource fork
 12h    WORD    total files and subdirectories contained within entry
                always 0000h if entry is a file
 14h    WORD    creation date in AFP format
 16h    WORD    last-access date in AFP format
 18h    WORD    last-modified date in AFP format
 1Ah    WORD    last-modified time in AFP format
 1Ch    WORD    last-backup date in AFP format
 1Eh    WORD    last-backup time in AFP format
 20h 32 BYTEs   Finder information
 40h 32 BYTEs   long filename
 60h    DWORD   NetWare object ID of owner
 64h 12 BYTEs   short filename (MS-DOS 8.3 format)
 70h    WORD    access privileges (see #02313)
SeeAlso: #02309,#02338

Bitfields for NetWare AFP file/directory attributes:
Bit(s)  Description     (Table 02312)
 0      search mode
 1      search mode
 2      search mode
 3      (undefined)
 4      transaction
 5      index
 6      read audit
 7      write audit
 8      read-only
 9      hidden
 10     system
 11     execute-only
 12     subdirectory
 13     archive
 14     (undefined)
 15     shareable file
SeeAlso: #02311,#02322,#02337

Bitfields for NetWare AFP access privileges:
Bit(s)  Description     (Table 02313)
 8      read (files)
 9      write (files)
 10     open (files)
 11     create (files)
 12     delete (files)
 13     parental (directories): create/delete/rename subdirectories
 14     search (directories)
 15     modify file status flags
SeeAlso: #02311,#02337,#02327
--------N-21F223SF06-------------------------
INT 21 - Novell NetWare v2+ - AFP GET ENTRY ID FROM NETWARE HANDLE
        AX = F223h subfn 06h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02314)
        ES:DI -> reply buffer (see #02315)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=04h,AX=F223h/SF=0Ch,AX=F223h/SF=12h

Format of NetWare "AFP Get Entry ID from NetWare Handle" request packet:
Offset  Size    Description     (Table 02314)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    06h (subfunction "AFP Get Entry ID from NetWare Handle")
 03h  6 BYTEs   NetWare file handle
SeeAlso: #02315,#02307

Format of NetWare "AFP Get Entry ID from NetWare Handle" reply packet:
Offset  Size    Description     (Table 02315)
 00h    BYTE    volume number
 01h    DWORD   AFP entry ID corresponding to same file as NetWare handle
 05h    BYTE    fork indicator (00h data fork, 01h resource fork)
SeeAlso: #02314,#02308
--------N-21F223SF07-------------------------
INT 21 - Novell NetWare v2+ - AFP RENAME
        AX = F223h subfn 07h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02316)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=01h,AX=F223h/SF=03h,AX=F223h/SF=08h

Format of NetWare "AFP Rename" request packet:
Offset  Size    Description     (Table 02316)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    07h (subfunction "AFP Rename")
 03h    BYTE    volume number
 04h    DWORD   source AFP entry ID
 08h    DWORD   destination AFP entry ID
 0Ch    BYTE    source path length
 0Dh  N BYTEs   AFP-style source path (relative to source AFP entry ID)
        BYTE    destination path length
      N BYTEs   AFP-style destination path (relative to destination entry ID)
Note:   the file may be moved from one directory to another without being
          renamed by setting the destination path to the empty string
--------N-21F223SF08-------------------------
INT 21 - Novell NetWare v2+ - AFP OPEN FILE FORK
        AX = F223h subfn 08h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02317)
        ES:DI -> reply buffer (see #02318)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=01h,AX=F223h/SF=05h,AX=F223h/SF=09h

Format of NetWare "AFP Open File Fork" request packet:
Offset  Size    Description     (Table 02317)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    08h (subfunction "AFP Open File Fork")
 03h    BYTE    volume number
 04h    DWORD   AFP entry ID
 08h    BYTE    fork indicator (00h = data fork, 01h = resource fork)
 09h    BYTE    access mode
                bit 0: read
                bit 1: write
                bit 2: deny read access to others
                bit 3: deny write access to others
                bit 4: compatibility mode (should be set)
 0Ah    BYTE    path length
 0Bh  N BYTEs   AFP-style pathname (relative to AFP entry ID)
SeeAlso: #02318

Format of NetWare "AFP Open File Fork" reply packet:
Offset  Size    Description     (Table 02318)
 00h    DWORD   AFP entry ID for newly-opened file fork
 04h    DWORD   length of opened fork
 08h  6 BYTEs   NetWare file handle
SeeAlso: #02317
--------N-21F223SF09-------------------------
INT 21 - Novell NetWare v2+ - AFP SET FILE INFORMATION
        AX = F223h subfn 09h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02319)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=05h,AX=F223h/SF=0Ah,AX=F223h/SF=13h

Format of NetWare "AFP Set File Information" request packet:
Offset  Size    Description     (Table 02319)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    09h (subfunction "AFP Set File Information")
 03h    BYTE    volume number
 04h    DWORD   AFP entry ID
 08h    WORD    request bitmap (see #02320)
 0Ah    WORD    directory/file attributes (see #02335)
 0Ch    WORD    creation date in AFP format
 0Eh    WORD    last-access date in AFP format
 10h    WORD    last-modified date in AFP format
 12h    WORD    last-modified time in AFP format
 14h    WORD    last-backup date in AFP format
 16h    WORD    last-backup time in AFP format
 18h 32 BYTEs   Finder information
 38h    BYTE    path length
 39h  N BYTEs   AFP-style pathname (relative to AFP entry ID)
SeeAlso: #02334

Bitfields for NetWare AFP request bitmap:
Bit(s)  Description     (Table 02320)
 8      set attributes
 10     set creation date
 11     set last-access date
 12     set last-modified date
 13     set last-backup date
 14     set Finder information
SeeAlso: #02319,#02334
--------N-21F223SF0A-------------------------
INT 21 - Novell NetWare v2+ - AFP SCAN FILE INFORMATION
        AX = F223h subfn 0Ah
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02321)
        ES:DI -> reply buffer (see #02323)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=01h,AX=F223h/SF=03h,AX=F223h/SF=08h

Format of NetWare "AFP Scan File Information" request packet:
Offset  Size    Description     (Table 02321)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    0Ah (subfunction "AFP Scan File Information")
 03h    BYTE    volume number
 04h    DWORD   AFP entry ID
 08h    DWORD   AFP last-seen ID (from previous call)
                FFFFFFFFh on first call
 0Ch    WORD    number of entries to return (max. 4)
 0Eh    WORD    search bitmap (see #02322)
 10h    WORD    request bitmap (see #02310)
 12h    BYTE    path length
 13h  N BYTEs   AFS-style directory path (relative to AFP entry ID)
SeeAlso: #02323,#02336

Bitfields for NetWare AFP search bitmap:
Bit(s)  Description     (Table 02322)
 8      hidden files and directories
 9      system files and directories
 10     subdirectories
 11     files
SeeAlso: #02321,#02336,#02310,#02312

Format of NetWare "AFP Scan File Information" reply packet:
Offset  Size    Description     (Table 02323)
 00h    WORD    number of entries returned
 02h 120N BYTEs file information records (see #02324)
SeeAlso: #02321

Format of NetWare AFP file information:
Offset  Size    Description     (Table 02324)
 00h    DWORD   AFP entry ID
 04h    DWORD   parent directory's AFP entry ID
 08h    WORD    directory/file attributes (see #02312)
 0Ah    DWORD   length of data fork
 0Eh    DWORD   length of resource fork
 12h    WORD    total files and subdirectories contained within entry
                always 0000h if entry is a file
 14h    WORD    creation date in AFP format
 16h    WORD    last-access date in AFP format
 18h    WORD    last-modified date in AFP format
 1Ah    WORD    last-modified time in AFP format
 1Ch    WORD    last-backup date in AFP format
 1Eh    WORD    last-backup time in AFP format
 20h 32 BYTEs   Finder information
 40h 32 BYTEs   long filename
 60h    DWORD   NetWare object ID of owner
 64h 12 BYTEs   short filename (MS-DOS 8.3 format)
 70h    WORD    access privileges (see #02313)
SeeAlso: #02323
--------N-21F223SF0B-------------------------
INT 21 - Novell NetWare v2+ - AFP ALLOCATE TEMPORARY DIRECTORY HANDLE
        AX = F223h subfn 0Bh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02325)
        ES:DI -> reply buffer (see #02326)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=0Dh

Format of NetWare "AFP Alloc Temporary Directory Handle" request packet:
Offset  Size    Description     (Table 02325)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    0Bh (subfunction "AFT Alloc Temporary Directory Handle")
 03h    BYTE    volume number
 04h    DWORD   AFP entry ID
 08h    BYTE    path length
 09h  N BYTEs   AFP-style pathname
SeeAlso: #02326

Format of NetWare "AFP Alloc Temporary Directory Handle" request packet:
Offset  Size    Description     (Table 02326)
 00h    BYTE    directory handle
 01h    BYTE    NetWare access rights (see #02327)
SeeAlso: #02325

Bitfields for NetWare AFP access rights:
Bit(s)  Description     (Table 02327)
 0      read
 1      write
 2      open
 3      create
 4      delete
 5      parental: create/delete/rename subdirectories
 6      search
 7      modify file status flags
SeeAlso: #02326,#02313
--------N-21F223SF0C-------------------------
INT 21 - Novell NetWare v2+ - AFP GET ENTRY ID FROM PATHNAME
        AX = F223h subfn 0Ch
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02328)
        ES:DI -> reply buffer (see #02329)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=04h,AX=F223h/SF=06h,AX=F223h/SF=12h

Format of NetWare "AFP Get Entry ID from Path Name" request packet:
Offset  Size    Description     (Table 02328)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    0Ch (subfunction "AFP Get Entry ID from Path Name")
 03h    BYTE    NetWare directory handle
 04h    BYTE    path length
 05h  N BYTEs   pathname
SeeAlso: #02329

Format of NetWare "AFP Get Entry ID from Path Name" reply packet:
Offset  Size    Description     (Table 02329)
 00h    DWORD   AFP entry ID corresponding to specified file
SeeAlso: #02328
--------N-21F223SF0D-------------------------
INT 21 - Novell NetWare v2+ - AFP 2.0 CREATE DIRECTORY
        AX = F223h subfn 0Dh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02330)
        ES:DI -> reply buffer (see #02331)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=01h,AX=F223h/SF=0Eh

Format of NetWare "AFP 2.0 Create Directory" request buffer:
Offset  Size    Description     (Table 02330)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    0Dh (subfunction "AFP 2.0 Create Directory")
 03h    BYTE    volume number
 04h    DWORD   AFP entry ID
 08h    BYTE    reserved for future use
 09h 32 BYTEs   Finder information
 29h  6 BYTEs   ProDOS information
 2Fh    BYTE    path length
 30h    var     AFS-style directory path (relative to AFP entry)
SeeAlso: #02331,#02302

Format of NetWare "AFP 2.0 Create Directory" reply buffer:
Offset  Size    Description     (Table 02331)
 00h    DWORD   new directory ID
SeeAlso: #02330,#02303
--------N-21F223SF0E-------------------------
INT 21 - Novell NetWare v2+ - AFP 2.0 CREATE FILE
        AX = F223h subfn 0Eh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02332)
        ES:DI -> reply buffer (see #02333)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=0Dh

Format of NetWare "AFP 2.0 Create File" request packet:
Offset  Size    Description     (Table 02332)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    0Eh (function "AFP 2.0 Create File")
 03h    BYTE    volume number
 04h    DWORD   AFP entry ID
 08h    BYTE    flag: delete existing file? (00h no, 01h yes)
 09h 32 BYTEs   Finder information
 29h  6 BYTEs   ProDOS information
 2Fh    BYTE    path length
 30h    var     AFP-style pathname (relative to AFP entry ID)
SeeAlso: #02333,#02304

Format of NetWare "AFP 2.0 Create File" reply packet:
Offset  Size    Description     (Table 02333)
 00h    DWORD   new file ID
SeeAlso: #02332,#02305
--------N-21F223SF10-------------------------
INT 21 - Novell NetWare v2+ - AFP 2.0 SET FILE INFORMATION
        AX = F223h subfn 10h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02334)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=09h,AX=F223h/SF=11h

Format of NetWare "AFP 2.0 Set File Information" request packet:
Offset  Size    Description     (Table 02334)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    10h (subfunction "AFS 2.0 Set File Information")
 03h    BYTE    volume number
 04h    DWORD   AFP entry ID
 08h    WORD    request bitmap (see #02320)
 0Ah    WORD    directory/file attributes (see #02335)
 0Ch    WORD    creation date in AFP format
 0Eh    WORD    last-access date in AFP format
 10h    WORD    last-modified date in AFP format
 12h    WORD    last-modified time in AFP format
 14h    WORD    last-backup date in AFP format
 16h    WORD    last-backup time in AFP format
 18h 32 BYTEs   Finder information
 38h  6 BYTEs   ProDOS information
 3Eh    BYTE    path length
 3Fh  N BYTEs   AFP-style pathname (relative to AFP entry ID)
SeeAlso: #02319

Bitfields for NetWare AFP directory/file attributes:
Bit(s)  Description     (Table 02335)
 0      read-only
 1      hidden
 2      system
 3      execute-only
 4      subdirectory
 5      archive
 7      shareable file
SeeAlso: #02334
--------N-21F223SF11-------------------------
INT 21 - Novell NetWare v2+ - AFP 2.0 SCAN FILE INFORMATION
        AX = F223h subfn 11h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02336)
        ES:DI -> reply buffer (see #02337)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=0Dh,AX=F223h/SF=10h

Format of NetWare "AFP 2.0 Scan File Information" request packet:
Offset  Size    Description     (Table 02336)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    11h (subfunction "AFP 2.0 Scan File Information")
 03h    BYTE    volume number
 04h    DWORD   AFP entry ID
 08h    DWORD   AFP last-seen ID (from previous call)
                FFFFFFFFh on first call
 0Ch    WORD    number of entries to return (max. 4)
 0Eh    WORD    search bitmap (see #02322)
 10h    WORD    request bitmap (see #02310)
 12h    BYTE    path length
 13h  N BYTEs   AFS-style directory path (relative to AFP entry ID)
SeeAlso: #02337

Format of NetWare "AFP 2.0 Scan File Information" reply packet:
Offset  Size    Description     (Table 02337)
 00h    WORD    number of entries returned
 02h 120N BYTEs file information records (see #02338)
SeeAlso: #02336

Format of NetWare AFP 2.0 file information:
Offset  Size    Description     (Table 02338)
 00h    DWORD   AFP entry ID
 04h    DWORD   parent directory's AFP entry ID
 08h    WORD    directory/file attributes (see #02312)
 0Ah    DWORD   length of data fork
 0Eh    DWORD   length of resource fork
 12h    WORD    total files and subdirectories contained within entry
                always 0000h if entry is a file
 14h    WORD    creation date in AFP format
 16h    WORD    last-access date in AFP format
 18h    WORD    last-modified date in AFP format
 1Ah    WORD    last-modified time in AFP format
 1Ch    WORD    last-backup date in AFP format
 1Eh    WORD    last-backup time in AFP format
 20h 32 BYTEs   Finder information
 40h 32 BYTEs   long filename
 60h    DWORD   NetWare object ID of owner
 64h 12 BYTEs   short filename (MS-DOS 8.3 format)
 70h    WORD    access privileges (see #02313)
 72h  6 BYTEs   ProDOS information
SeeAlso: #02337,#02310,#02311
--------N-21F223SF12-------------------------
INT 21 - Novell NetWare v2+ - AFP GET DOS FILENAME FROM ENTRY ID
        AX = F223h subfn 12h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02339)
        ES:DI -> reply buffer (see #02340)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=04h,AX=F223h/SF=06h

Format of NetWare "AFP Get DOS Name from Entry ID" request packet:
Offset  Size    Description     (Table 02339)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    12h (subfunction "AFP Get DOS Name From Entry ID")
 03h    BYTE    volume number
 04h    DWORD   AFP entry ID
SeeAlso: #02340

Format of NetWare "AFP Get DOS Name from Entry ID" reply packet:
Offset  Size    Description     (Table 02340)
 00h    BYTE    length of DOS pathname
 01h  N BYTEs   pathname corresponding to AFP entry ID
SeeAlso: #02339
--------N-21F223SF13-------------------------
INT 21 - Novell NetWare v2+ - AFP GET MACINTOSH INFORMATION ON DELETED FILE
        AX = F223h subfn 13h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02341)
        ES:DI -> reply buffer (see #02342)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F223h/SF=04h,AX=F223h/SF=05h,AX=F223h/SF=09h

Format of NetWare "AFP Get Macintosh Info on Deleted File" request packet:
Offset  Size    Description     (Table 02341)
 00h    WORD    (big-endian) length of following data
 02h    BYTE    13h (subfunction "AFP Get Macintosh Info on Deleted File")
 03h    BYTE    volume number
 04h    DWORD   server's DOS directory entry index
SeeAlso: #02342

Format of NetWare "AFP Get Macintosh Info on Deleted File" reply packet:
Offset  Size    Description     (Table 02342)
 00h 32 BYTEs   Finder information
 20h  6 BYTEs   ProDOS information
 26h    DWORD   size of resource fork
 2Ah    BYTE    length of filename
 2Bh  N BYTEs   filename
SeeAlso: #02341
--------N-21F23D-----------------------------
INT 21 - Novell NetWare - COMMIT FILE
        AX = F23Dh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02347)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=3Eh,AH=F2h"Novell",AX=F23Eh,AX=F243h
--------N-21F23E-----------------------------
INT 21 - Novell NetWare - FILE SEARCH INITIALIZE (FindFirst)
        AX = F23Eh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02343)
        ES:DI -> reply buffer (see #02344)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=4Eh,AH=F2h"Novell",AX=F23Fh,AX=F242h

Format of NetWare "File Search Initialize" request packet:
Offset  Size    Description     (Table 02343)
 00h    BYTE    directory handle
 01h    BYTE    length of directory path
 02h  N BYTEs   path of directory to search, in VOLUME:DIRECTORY/... format
SeeAlso: #02344,#02345

Format of NetWare "File Search Initialize" reply packet:
Offset  Size    Description     (Table 02344)
 00h    BYTE    volume number
 01h    WORD    directory ID
 03h    WORD    search sequence number
 05h    BYTE    directory access rights
SeeAlso: #02343,#02346
--------N-21F23F-----------------------------
INT 21 - Novell NetWare - FILE SEARCH CONTINUE (FindNext)
        AX = F23Fh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02345)
        ES:DI -> reply buffer (see #02346)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=4Eh,AH=F2h"Novell",AX=F23Eh,AX=F242h

Format of NetWare "File Search Continue" request packet:
Offset  Size    Description     (Table 02345)
 00h    BYTE    volume number
 02h    WORD    directory ID from File Search Initialize
 04h    WORD    search sequence (set to FFFFh before first call)
 06h    BYTE    search attributes
 07h    BYTE    length of search directory path
 08h  N BYTEs   name of search directory in VOLUME:DIRECTORY/.../DIR format
SeeAlso: #02346

Format of NetWare "File Search Continue" reply packet:
Offset  Size    Description     (Table 02346)
 00h    WORD    next search sequence
 02h    WORD    directory ID from File Search Initialize
 04h    WORD    reserved for future use
 06h 14 BYTEs   filename
 14h    BYTE    file attributes
 15h    BYTE    file mode
 16h    DWORD   file length
 2Ah    WORD    creation date
 2Ch    WORD    last-access date
 2Eh    WORD    last-modification date
 30h    WORD    last-modification time
SeeAlso: #02345
--------N-21F242-----------------------------
INT 21 - Novell NetWare - CLOSE FILE
        AX = F242h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02347)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=3Eh,AH=F2h"Novell",AX=F23Eh,AX=F243h,AX=F24Ah

Format of NetWare "Commit/Close File" request packet:
Offset  Size    Description     (Table 02347)
 00h    BYTE    reserved (0)
 01h  6 BYTEs   NetWare file handle
--------N-21F243-----------------------------
INT 21 - Novell NetWare - CREATE FILE
        AX = F243h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02348)
        ES:DI -> reply buffer (see #02349)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=3Ch,AH=F2h"Novell",AX=F23Eh,AX=F242h,AX=F24Ah,AX=F24Dh

Format of NetWare "Create File" request packet:
Offset  Size    Description     (Table 02348)
 00h    BYTE    directory handle
 01h    BYTE    file attributes
 02h    BYTE    length of filename
 03h  N BYTEs   filename in DOS format
SeeAlso: #02349

Format of NetWare "Create File" reply packet:
Offset  Size    Description     (Table 02349)
 00h  6 BYTEs   NetWare file handle
 06h    WORD    reserved
 08h 14 BYTEs   DOS-format filename
 16h    BYTE    file attributes
 17h    BYTE    file execute type
 18h    DWORD   file length
 1Ch    WORD    creation date
 1Eh    WORD    last-access date
 20h    WORD    last-modification date
 22h    WORD    last-modification time
SeeAlso: #02348
--------N-21F244-----------------------------
INT 21 - Novell NetWare - FILE SERVICES - ERASE FILE
        AX = F244h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02351)
        ES:DI ignored
Return: AL = status (see #02350)
Note:   this function only marks the file for deletion; use AH=E2h/SF=CEh to
          actually delete all marked files
SeeAlso: AH=13h,AH=41h,AH=E2h/SF=0Bh,AH=E3h/SF=CEh

(Table 02350)
Values for NetWare function status:
 00h    successful
 98h    nonexistent volume
 9Bh    invaid directory handle
 9Ch    invalid path
 FFh    no files found
SeeAlso: #02094,#02860 at INT 2F/AX=7A20h/BX=0000h

Format of NetWare "Erase Files" request packet:
Offset  Size    Description     (Table 02351)
 00h    BYTE    directory handle
 01h    BYTE    search attributes (see #01420 at AX=4301h)
 02h    BYTE    length of filespec
 03h  N BYTEs   ASCIZ filespec (may include wildcards)
--------N-21F247-----------------------------
INT 21 - Novell NetWare - GET CURRENT FILE SIZE
        AX = F247h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02352)
        ES:DI -> reply buffer (see #02353)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=42h,AH=F2h"Novell",AX=F23Eh,AX=F242h,AX=F24Ah,AX=F24Dh

Format of NetWare "Get Current Size of File" request packet:
Offset  Size    Description     (Table 02352)
 00h    BYTE    reserved for future use
 01h  6 BYTEs   NetWare file handle
SeeAlso: #02353

Format of NetWare "Get Current Size of File" reply packet:
Offset  Size    Description     (Table 02353)
 00h    DWORD   current size of file
SeeAlso: #02352
--------N-21F24A-----------------------------
INT 21 - Novell NetWare - COPY FROM ONE FILE TO ANOTHER
        AX = F24Ah
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02354)
        ES:DI -> reply buffer (see #02355)
Return: AX = status (see #02350)
Note:   this function only marks the file for deletion; use AH=E2h/SF=CEh to
          actually delete all marked files
SeeAlso: AH=F2h"Novell",AX=F243h,AX=F247h,AH=F3h"NetWare"

Format of NetWare "Copy from One File to Another" request packet:
Offset  Size    Description     (Table 02354)
 00h    BYTE    reserved for future use
 01h  6 BYTEs   source NetWare file handle
 07h  6 BYTEs   destination NetWare file handle
 0Dh    DWORD   source file offset
 11h    DWORD   destination file offset
 15h    DWORD   number of bytes to copy
SeeAlso: #02355

Format of NetWare "Copy from One File to Another" reply packet:
Offset  Size    Description     (Table 02355)
 00h    DWORD   number of bytes actually copied
SeeAlso: #02354
--------N-21F24D-----------------------------
INT 21 - Novell NetWare - CREATE NEW FILE
        AX = F24Dh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02356)
        ES:DI -> reply buffer (see #02357)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AX=6C00h,AH=F2h"Novell",AX=F23Eh,AX=F242h,AX=F243h

Format of NetWare "Create New File" request packet:
Offset  Size    Description     (Table 02356)
 00h    BYTE    directory handle
 01h    BYTE    file attributes
 02h    BYTE    length of filename
 03h  N BYTEs   filename in DOS format
SeeAlso: #02357

Format of NetWare "Create New File" reply packet:
Offset  Size    Description     (Table 02357)
 00h  6 BYTEs   NetWare file handle
 06h    WORD    reserved
 08h 14 BYTEs   DOS-format filename
 16h    BYTE    file attributes
 17h    BYTE    file execute type
 18h    DWORD   file length
 1Ch    WORD    creation date
 1Eh    WORD    last-access date
 20h    WORD    last-modification date
 22h    WORD    last-modification time
SeeAlso: #02356
--------N-21F24E-----------------------------
INT 21 - Novell NetWare v2+ - ALLOW TASK ACCESS TO FILE
        AX = F24Eh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02358)
        ES:DI -> reply buffer (see #02359)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
Desc:   allow calling task to gain access to an already-open file belonging
          to another task of the same client
Note:   the caller receives the same access rights as the owning task, and
          must use the returned new handle to access the file
SeeAlso: AH=F2h"NetWare",AX=F244h

Format of NetWare "Allow Task Access to File" request packet:
Offset  Size    Description     (Table 02358)
 00h    BYTE    reserved for future use
 01h  6 BYTEs   NetWare file handle
SeeAlso: #02359

Format of NetWare "Allow Task Access to File" reply packet:
Offset  Size    Description     (Table 02359)
 00h  6 BYTEs   new file handle
SeeAlso: #02358
--------N-21F256SF01-------------------------
INT 21 - Novell NetWare - CLOSE EXTENDED ATTRIBUTE HANDLE
        AX = F256h subfn 01h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02360)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F256h/SF=02h,AX=F256h/SF=04h,AX=F256h/SF=05h

Format of NetWare "Close Extended Attribute Handle" request packet:
Offset  Size    Description     (Table 02360)
 00h    BYTE    01h (subfunction "Close Extended Attribute Handle")
 01h    WORD    reserved for future use
 03h    DWORD   extended attribute handle
--------N-21F256SF02-------------------------
INT 21 - Novell NetWare - WRITE EXTENDED ATTRIBUTE
        AX = F256h subfn 02h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02361)
        ES:DI -> reply buffer (see #02362)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F256h/SF=01h,AX=F256h/SF=03h,AX=F256h/SF=05h

Format of NetWare "Write Extended Attribute" request packet:
Offset  Size    Description     (Table 02361)
 00h    BYTE    02h (subfunction "Write Extended Attribute")
 01h    WORD    flags (see #02372)
 03h  8 BYTEs   extended attribute handle structure (see #02373)
 0Bh    DWORD   write size
 0Fh    DWORD   write position
 13h    DWORD   access flag
 17h    WORD    length of value
 19h    WORD    key length
 1Bh  N BYTEs   key
      N BYTEs   value
SeeAlso: #02361,#02363

Format of NetWare "Write Extended Attribute" reply packet:
Offset  Size    Description     (Table 02362)
 00h    DWORD   error code
 04h    DWORD   number of bytes written
 08h    DWORD   new extended attribute handle
SeeAlso: #02361
--------N-21F256SF03-------------------------
INT 21 - Novell NetWare - READ EXTENDED ATTRIBUTE
        AX = F256h subfn 03h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02363)
        ES:DI -> reply buffer (see #02364)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F256h/SF=01h,AX=F256h/SF=04h,AX=F256h/SF=05h

Format of NetWare "Read Extended Attribute" request packet:
Offset  Size    Description     (Table 02363)
 00h    BYTE    03h (subfunction "Read Extended Attribute")
 01h    WORD    flags (see #02372)
 03h  8 BYTEs   extended attribute handle structure (see #02373)
 0Bh    DWORD   read position
 0Fh    DWORD   inspect size
 13h    WORD    key length
 15h  N BYTEs   key
SeeAlso: #02364,#02361

Format of NetWare "Read Extended Attribute" reply packet:
Offset  Size    Description     (Table 02364)
 00h    DWORD   error code
 04h    DWORD   total extended attribute value length
 08h    DWORD   new extended attribute handle
 0Ch    DWORD   access flag
 10h    WORD    value length
 12h  N BYTEs   EA value
SeeAlso: #02363
--------N-21F256SF04-------------------------
INT 21 - Novell NetWare - ENUMERATE EXTENDED ATTRIBUTES
        AX = F256h subfn 04h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02365)
        ES:DI -> reply buffer (see #02366)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F256h/SF=01h,AX=F256h/SF=02h,AX=F256h/SF=05h

Format of NetWare "Enumerate Extended Attributes" request packet:
Offset  Size    Description     (Table 02365)
 00h    BYTE    04h (subfunction "Enumerate Extended Attributes")
 01h    WORD    flags (see #02372)
 03h  8 BYTEs   extended attribute handle structure (see #02373)
 0Bh    DWORD   inspect size
 0Fh    WORD    enumeration sequence
 11h    WORD    key length
 13h  N BYTEs   key
SeeAlso: #02366

Format of NetWare "Enumerate Extended Attributes" reply packet:
Offset  Size    Description     (Table 02366)
 00h    DWORD   error code
 04h    DWORD   total extended attributes
 08h    DWORD   total extended attribute data size
 0Ch    DWORD   total extended attribute key size
 10h    DWORD   new extended attribute handle
---information level 0---
 14h  2 WORDs   reserved
---information level 1---
 14h    WORD    number of enumerated extended attribute structures
 16h    var     EA structure level 1
---information level 6---
 14h    WORD    reserved
 16h    var     EA structure level 6
---information level 7---
 14h    WORD    number of enumerated extended attribute structures
 16h    var     EA structure level 7
SeeAlso: #02365

Format of NetWare Extended Attribute structure level 1:
Offset  Size    Description     (Table 02367)
 00h    DWORD   length of EA value
 04h    WORD    length of EA key
 06h    DWORD   access flag
 0Ah  N BYTEs   key
SeeAlso: #02366,#02368,#02369

Format of NetWare Extended Attribute structure level 6:
Offset  Size    Description     (Table 02368)
 00h    DWORD   length of EA value
 04h    WORD    length of EA key
 06h    DWORD   access flag
 0Ah    DWORD   key extents
 0Eh    DWORD   value extents
 12h  N BYTEs   key
SeeAlso: #02366,#02367,#02369

Format of NetWare Extended Attribute structure level 7:
Offset  Size    Description     (Table 02369)
 00h    BYTE    key length
 01h  N BYTEs   key
        BYTE    00h
SeeAlso: #02366,#02367,#02368
--------N-21F256SF05-------------------------
INT 21 - Novell NetWare - DUPLICATE EXTENDED ATTRIBUTES
        AX = F256h subfn 05h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02370)
        ES:DI -> reply buffer (see #02371)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F256h/SF=01h,AX=F256h/SF=02h,AX=F256h/SF=04h

Format of NetWare "Duplicate Extended Attributes" request packet:
Offset  Size    Description     (Table 02370)
 00h    BYTE    05h (subfunction "Duplicate Extended Attributes")
 01h    WORD    source flags (see #02372)
 03h    WORD    destination flags (see #02372)
 05h  8 BYTEs   source extended attribute structure (see #02373)
 0Dh  8 BYTEs   destination extended attribute structure (see #02373)
SeeAlso: #02371

Format of NetWare "Duplicate Extended Attributes" reply packet:
Offset  Size    Description     (Table 02371)
 00h    DWORD   number duplicated
 04h    DWORD   data size duplicated
 08h    DWORD   key size duplicated
SeeAlso: #02370

Bitfields for NetWare extended attribute flags:
Bit(s)  Description     (Table 02372)
 1-0    extended attribute handle structure type
        00 volume number and directory entry number
        01 NetWare file handle
        10 extended attribute handle
        11 not used
 2      close handle on error
 6-4    information level (0,1,6,7)
 7      not used
SeeAlso: #02370,#02373

Format of NetWare extended attribute structure:
Offset  Size    Description     (Table 02373)
---type 0---
 00h    DWORD   volume number
 04h    DWORD   directory entry number
---type 1---
 00h    DWORD   NetWare file handle
 04h  4 BYTEs   unused
---type 2---
 00h    DWORD   extended attribute handle
 04h  4 BYTEs   unused
SeeAlso: #02372
--------N-21F257SF01-------------------------
INT 21 - Novell NetWare - OPEN/CREATE FILE OR SUBDIRECTORY
        AX = F257h subfn 01h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02374)
        ES:DI -> reply buffer (see #02375)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=6C00h,AX=F257h/SF=02h,AX=F257h/SF=04h

Format of NetWare "Open/Create File or Subdirectory" request packet:
Offset  Size    Description     (Table 02374)
 00h    BYTE    01h (subfunction "Open/Create File or Subdirectory")
 01h    BYTE    name space (see #02387)
 02h    BYTE    open/create mode
 03h    WORD    search attributes
 05h    DWORD   return information mask
 09h    DWORD   create attributes
 0Dh    WORD    desired access rights (see #02377)
 0Fh            NetWare handle/path structure
SeeAlso: #02375

Format of NetWare "Open/Create File or Subdirectory" reply packet:
Offset  Size    Description     (Table 02375)
 00h    DWORD   file handle
 04h    BYTE    open/create action
                00h open
                01h replace
                03h create
 05h    BYTE    reserved
SeeAlso: #02374

Format of NetWare Handle/Path structure:
Offset  Size    Description     (Table 02376)
 00h    BYTE    volume number
 01h    DWORD   directory base or short handle
 05h    BYTE    handle flag
                00h short directory handle
                01h directory base
                FFh no handle
 06h    BYTE    path component count
 07h  N BYTEs   path component

Bitfields for NetWare desired access rights:
Bit(s)  Description     (Table 02377)
 0      read-only mode
 1      write-only
 2      deny read
 3      deny write
 4      compatibility mode
 6      write-through mode
SeeAlso: #02374
--------N-21F257SF02-------------------------
INT 21 - Novell NetWare - INITIALIZE SEARCH
        AX = F257h subfn 02h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02378)
        ES:DI -> reply buffer (see #02379)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=4Eh,AH=F2h"Novell",AX=F257h/SF=01h,AX=F257h/SF=03h

Format of NetWare "Initialize Search" request packet:
Offset  Size    Description     (Table 02378)
 00h    BYTE    02h (subfunction "Initialize Search")
 01h    BYTE    name space (see #02387)
 02h    BYTE    reserved for future use
 03h            NetWare Handle/Path structure (see #02376)
SeeAlso: #02379

Format of NetWare "Initialize Search" reply packet:
Offset  Size    Description     (Table 02379)
 00h  9 BYTEs   search sequence
                BYTE    volume number
                DWORD   directory number
                DWORD   current directory number
SeeAlso: #02378
--------N-21F257SF03-------------------------
INT 21 - Novell NetWare - SCAN NAMESPACE ENTRY INFO
        AX = F257h subfn 03h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02380)
        ES:DI -> reply buffer (see #02381)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F257h/SF=04h,AX=F257h/SF=05h

Format of NetWare "Search for File or Subdirectory" request packet:
Offset  Size    Description     (Table 02380)
 00h    BYTE    03h (subfunction "Search for File or Subdirectory")
        ???
SeeAlso: #02381

Format of NetWare "Search for File or Subdirectory" reply packet:
Offset  Size    Description     (Table 02381)
 00h    ???
SeeAlso: #02380
--------N-21F257SF04-------------------------
INT 21 - Novell NetWare - RENAME OR MOVE FILE OR SUBDIRECTORY
        AX = F257h subfn 04h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02382)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=56h,AH=F2h"Novell",AX=F257h/SF=02h,AX=F257h/SF=03h,AX=F257h/SF=05h

Format of NetWare "Rename or Move File or Subdirectory" request packet:
Offset  Size    Description     (Table 02382)
 00h    BYTE    04h (subfunction "Rename or Move File or Subdirectory")
 01h    BYTE    name space (see #02387)
 02h    BYTE    rename flags
                bit 0: rename successful
                bit 1: compatibility mode
 03h    WORD    search attributes
 05h            source NetWare Handle Path
                destination NetWare Handle Path
--------N-21F257SF05-------------------------
INT 21 - Novell NetWare - SCAN FILE OR SUBDIRECTORY FOR TRUSTEES
        AX = F257h subfn 05h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02383)
        ES:DI -> reply buffer (see #02384)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F257h/SF=04h,AX=F257h/SF=06h

Format of NetWare "Scan File or Subdirectory for Trustees" request packet:
Offset  Size    Description     (Table 02383)
 00h    BYTE    05h (subfunction "Scan File or Subdirectory for Trustees")
 01h    BYTE    name space (see #02387)
 02h    BYTE    reserved for future use
 03h    DWORD   scan sequence (set to 00000000h before first call)
 07h            NetWare Handle/Path structure (see #02376)
SeeAlso: #02384

Format of NetWare "Scan File or Subdirectory for Trustees" reply packet:
Offset  Size    Description     (Table 02384)
 00h    DWORD   next scan sequence or FFFFFFFFh if no more
 04h    WORD    number of trustee object IDs returned
 06h            trustee structure
SeeAlso: #02383
--------N-21F257SF06-------------------------
INT 21 - Novell NetWare v3+ - GET INFORMATION ABOUT FILE OR DIRECTORY
        AX = F257h subfn 06h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02385)
        ES:DI -> reply buffer (see #02388)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AH=F2h"Novell",AX=F257h/SF=02h,AX=F257h/SF=05h,AX=F257h/SF=07h

Format of NetWare "Get NS Entry Info" request buffer:
Offset  Size    Description     (Table 02385)
 00h    BYTE    06h (subfunction "Get NS Entry Info")
 01h    BYTE    name space (see #02387)
 02h    BYTE    destination name space
 03h    WORD    search attributes
 05h    DWORD   return information mask (see #02386)
 09h    BYTE    volume number
 0Ah    DWORD   directory base
 0Eh    BYTE    handle flag
                00h first byte of dir base is dir handle; ignore volume number
                01h dir base = unique ID, volume number set
                FFh volume number and dir base ignored, volume part of path
 0Fh    BYTE    number of path components
 10h  N BYTEs   list of path components (each a counted string)
SeeAlso: #02388

Bitfields for return information mask:
Bit(s)  Description     (Table 02386)
 0      include filename
 1      data stream space allocated info
 2      attributes info
 3      data stream size info
 4      total space allocated for all data streams
 5      extended attributes info
 6      archive info
 7      modify info
 8      create info
 9      name space info
 10     directory info
 11     rights info

(Table 02387)
Values for NetWare name space:
 00h    DOS
 01h    Macintosh
 02h    NFS
 03h    FTAM
 04h    OS/2
SeeAlso: #02385,#02393

Format of NetWare "Get NS Entry Info" reply buffer:
Offset  Size    Description     (Table 02388)
 00h 72 BYTEs   reserved
 48h    DWORD   creator's name space number
 4Ch 257 BYTEs  reserved
SeeAlso: #02385
--------N-21F257SF07-------------------------
INT 21 - Novell NetWare - MODIFY FILE OR SUBDIRECTORY DOS INFORMATION
        AX = F257h subfn 07h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02389)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F257h/SF=04h,AX=F257h/SF=08h

Format of NetWare "Modify File or Subdirectory DOS Information" request packet:
Offset  Size    Description     (Table 02389)
 00h    BYTE    07h (subfunction "Modify File or Subdirectory DOS Information")
 01h    BYTE    name space (see #02387)
 02h    BYTE    reserved for future use
 03h    WORD    search attributes
 05h    DWORD   modify DOS mask
 09h            Modify DOS information structure
--------N-21F257SF08-------------------------
INT 21 - Novell NetWare - DELETE FILE/DIRECTORY
        AX = F257h subfn 08h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02390)
        ES:DI -> reply buffer (see #02391)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F257h/SF=01h,AX=F257h/SF=07h

Format of NetWare "Delete File/Directory" request packet:
Offset  Size    Description     (Table 02390)
 00h    BYTE    08h (subfunction "Delete File/Directory")
        ???
SeeAlso: #02391

Format of NetWare "Delete File/Directory" reply packet:
Offset  Size    Description     (Table 02391)
 00h    ???
SeeAlso: #02390
--------N-21F257SF09-------------------------
INT 21 - Novell NetWare - SET SHORT DIRECTORY HANDLE
        AX = F257h subfn 09h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02392)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F257h/SF=0Ch

Format of NetWare "Set Short Directory Handle" request packet:
Offset  Size    Description     (Table 02392)
 00h    BYTE    09h (subfunction "Set Short Directory Handle")
 01h    BYTE    name space (see #02387)
 02h    BYTE    data stream
 03h    BYTE    destination directory handle
 04h    BYTE    reserved for future use
 05h            NetWare Handle/Path structure (see #02376)
--------N-21F257SF0A-------------------------
INT 21 - Novell NetWare v3+ - ADD TRUSTEE SET TO FILE OR SUBDIRECTORY
        AX = F257h subfn 0Ah
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02393)
        ES:DI ignored
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F257h/SF=0Bh

Format of NetWare "Add Trustee Set" request packet:
Offset  Size    Description     (Table 02393)
 00h    BYTE    0Ah (subfunction "Add Trustee Set to File or Subdirectory")
 01h    BYTE    name space (see #02387)
 02h  2 BYTEs   reserved
 04h    WORD    trustee rights (see #02141)
 06h    WORD    object ID count
 08h            NetWare Handle/Path structure (see #02376)
      6 BYTEs   trustee structure (see #02394)

Format of NetWare trustee structure:
Offset  Size    Description     (Table 02394)
 00h    DWORD   object ID
 04h    WORD    trustee rights
SeeAlso: #02393
--------N-21F257SF0B-------------------------
INT 21 - Novell NetWare - DELETE TRUSTEE
        AX = F257h subfn 0Bh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02395)
        ES:DI -> reply buffer (see #02396)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F257h/SF=0Ah

Format of NetWare "Delete Trustee" request packet:
Offset  Size    Description     (Table 02395)
 00h    BYTE    0Bh (subfunction "Delete Trustee")
        ???
SeeAlso: #02396

Format of NetWare "Delete Trustee" reply packet:
Offset  Size    Description     (Table 02396)
 00h    ???
SeeAlso: #02395
--------N-21F257SF0C-------------------------
INT 21 - Novell NetWare v2+ - ALLOCATE SHORT DIRECTORY HANDLE
        AX = F257h subfn 0Ch
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02397)
        ES:DI -> reply buffer (see #02398)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
Note:   unlike "Alloc Permanent Directory Handle", this function does not
          automatically map a drive
SeeAlso: AH=F2h"Novell",AX=F223h/SF=04h,AX=F223h/SF=05h,AX=F223h/SF=09h

Format of NetWare "Allocate Short Directory Handle" request packet:
Offset  Size    Description     (Table 02397)
 00h    BYTE    0Ch (subfunction "Allocate Short Directory Handle")
 01h    BYTE    name space (see #02387)
 02h  2 BYTEs   reserved for future use
 04h    WORD    allocation mode
                bits 1-0: 00 permanent handle
                          01 temporary handle
                          10 special temporary handle
                          11 reserved
 06h            NetWare Handle/Path structure (see #02376)
SeeAlso: #02398

Format of NetWare "Allocate Short Directory Handle" reply packet:
Offset  Size    Description     (Table 02398)
 00h    BYTE    new directory handle
 01h    BYTE    volume number
 02h    DWORD   reserved for future use
SeeAlso: #02397
--------N-21F257SF10-------------------------
INT 21 - Novell NetWare - SCAN SALVAGEABLE FILES
        AX = F257h subfn 10h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02399)
        ES:DI -> reply buffer (see #02400)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=1Bh,AX=F257h/SF=11h,AX=F257h/SF=12h

Format of NetWare "Scan Salvageable Files" request packet:
Offset  Size    Description     (Table 02399)
 00h    BYTE    10h (subfunction "Scan Salvageable Files")
 01h    BYTE    name space
 02h    BYTE    data stream
 03h    DWORD   return information mask
 07h    DWORD   last sequence (set to FFFFFFFFh before first call)
 0Bh            NetWare Handle/Path structure (see #02376)
SeeAlso: #02400,#02123

Format of NetWare "Scan Salvageable Files" reply packet:
Offset  Size    Description     (Table 02400)
 00h    DWORD   next sequence number
 04h    WORD    deletion time
 06h    WORD    deletion date
 08h    DWORD   ID of deletor
 0Ch    DWORD   volume number
 10h    DWORD   directory entry number
 14h            NetWare Information Structure
SeeAlso: #02399,#02124
--------N-21F257SF11-------------------------
INT 21 - Novell NetWare - RECOVER SALVAGEABLE FILE
        AX = F257h subfn 11h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02401)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=1Ch,AX=F257h/SF=10h,AX=F257h/SF=12h

Format of NetWare "Recover Salvageable File" request packet:
Offset  Size    Description     (Table 02401)
 00h    BYTE    11h (subfunction "Recover Salvageable File")
 01h    BYTE    name space
 02h    BYTE    reserved for future use
 03h    DWORD   sequence number
 07h    DWORD   volume number
 0Bh    DWORD   scan directory base
 0Fh    BYTE    new file name length
 10h  N BYTEs   new file name
SeeAlso: #02402,#02125
--------N-21F257SF12-------------------------
INT 21 - Novell NetWare - PURGE SALVAGEABLE FILE
        AX = F257h subfn 12h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02402)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F216h/SF=1Dh,AX=F257h/SF=10h,AX=F257h/SF=11h

Format of NetWare "Purge Salvageable File" request packet:
Offset  Size    Description     (Table 02402)
 00h    BYTE    12h (subfunction "Purge Salvageable File")
 01h    BYTE    name space
 02h    BYTE    reserved
 03h    DWORD   sequence number
 07h    DWORD   volume number
 0Bh    DWORD   directory entry number
SeeAlso: #02401
--------N-21F257SF13-------------------------
INT 21 - Novell NetWare - GET NAMESPACE INFORMATION
        AX = F257h subfn 13h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02403)
        ES:DI -> reply buffer (see #02404)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F257h/SF=12h,AX=F257h/SF=15h

Format of NetWare "Get Namespace Information" request packet:
Offset  Size    Description     (Table 02403)
 00h    BYTE    13h (subfunction "Get Namespace Information")
 01h    BYTE    source name space (see #02387)
 02h    BYTE    destination name space
 03h    BYTE    reserved for future use
 04h    BYTE    volume number
 05h    DWORD   directory base
 09h    DWORD   namespace information mask
SeeAlso: #02404

Format of NetWare "Get Namespace Information" reply packet:
Offset  Size    Description     (Table 02404)
 00h    var     namespace-specific information
SeeAlso: #02403
--------N-21F257SF15-------------------------
INT 21 - Novell NetWare - GET PATH STRING FROM SHORT DIRECTORY HANDLE
        AX = F257h subfn 15h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02405)
        ES:DI -> reply buffer (see #02406)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F257h/SF=13h,AX=F257h/SF=16h

Format of NetWare "Get Path String from Short Directory Handle" request packet:
Offset  Size    Description     (Table 02405)
 00h    BYTE    15h (subfunction "Get Path String from Short Directory Handle")
 01h    BYTE    name space (see #02387)
 02h    BYTE    short directory handle
SeeAlso: #02406

Format of NetWare "Get Path String from Short Directory Handle" reply packet:
Offset  Size    Description     (Table 02406)
 00h    BYTE    length of path
 01h  N BYTEs   full directory path
SeeAlso: #02405
--------N-21F257SF16-------------------------
INT 21 - Novell NetWare - GENERATE DIRECTORY BASE AND VOLUME NUMBER
        AX = F257h subfn 16h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02407)
        ES:DI -> reply buffer (see #02408)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F257h/SF=15h,AX=F257h/SF=17h

Format of NetWare "Generate Directory Base and Volume Number" request packet:
Offset  Size    Description     (Table 02407)
 00h    BYTE    16h (subfunction "Generate Directory Base and Volume Number")
 01h    BYTE    name space (#02802)
 02h  3 BYTEs   reserved for future use
 05h            NetWare Handle/Path structure (see #02376)
SeeAlso: #02408

Format of NetWare "Generate Directory Base and Volume Number" reply packet:
Offset  Size    Description     (Table 02408)
 00h    DWORD   namespace directory base
 04h    DWORD   DOS directory base
 08h    BYTE    volume number
SeeAlso: #02407
--------N-21F257SF17-------------------------
INT 21 - Novell NetWare - GET NAME SPACE INFORMATION FORMAT
        AX = F257h subfn 17h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02409)
        ES:DI -> reply buffer (see #02410)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F257h/SF=18h,AX=F257h/SF=19h

Format of NetWare "Get Name Space Information Format" request packet:
Offset  Size    Description     (Table 02409)
 00h    BYTE    17h (subfunction "Get Name Space Information Format")
 01h    BYTE    name space (see #02387)
 02h    BYTE    volume number
SeeAlso: #02410

Format of NetWare "Get Name Space Information Format" reply packet:
Offset  Size    Description     (Table 02410)
 00h    DWORD   fixed bitmask
 04h    DWORD   variable bitmask
 08h    DWORD   huge bitmask
 0Ch    WORD    fixed bits defined
 0Eh    WORD    variable bits defined
 10h    WORD    huge bits defined
 12h 128 BYTEs  field lengths
SeeAlso: #02409
--------N-21F257SF18-------------------------
INT 21 - Novell NetWare - GET NAME SPACES LOADED
        AX = F257h subfn 18h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02411)
        ES:DI -> reply buffer (see #02412)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F257h/SF=17h,AX=F257h/SF=19h,AX=F257h/SF=1Ah
SeeAlso: AX=F216h/SF=2Fh

Format of NetWare "Get Name Spaces Loaded" request packet:
Offset  Size    Description     (Table 02411)
 00h    BYTE    18h (subfunction "Get Name Spaces Loaded")
 01h  2 BYTEs   reserved for future use
 03h    BYTE    volume number
SeeAlso: #02412

Format of NetWare "Get Name Spaces Loaded" reply packet:
Offset  Size    Description     (Table 02412)
 00h    WORD    number of namespace elements
 02h    WORD    number of namespace elements loaded
 04h  N BYTEs   loaded name spaces (each byte contains number of one loaded
                  name space)
SeeAlso: #02411
--------N-21F257SF19-------------------------
INT 21 - Novell NetWare - WRITE NAME SPACE INFO
        AX = F257h subfn 19h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02413)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F257h/SF=17h,AX=F257h/SF=18h

Format of NetWare "Write Name Space Info" request packet:
Offset  Size    Description     (Table 02413)
 00h    BYTE    19h (subfunction "Write Name Space Info")
 01h    BYTE    source name space (see #02387)
 02h    BYTE    destination name space
 03h    BYTE    volume number
 04h    DWORD   directory entry number
 08h    DWORD   namespace information bitmask
 0Ch 512 BYTEs  namespace-specific informatin
--------N-21F257SF1A-------------------------
INT 21 - Novell NetWare - READ EXTENDED NAME SPACE INFO
        AX = F257h subfn 1Ah
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02414)
        ES:DI -> reply buffer (see #02415)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F257h/SF=18h,AX=F257h/SF=19h,AX=F257h/SF=1Bh

Format of NetWare "Read Extended Name Space Info" request packet:
Offset  Size    Description     (Table 02414)
 00h    BYTE    1Ah (subfunction "Read Extended Name Space Info")
 01h    BYTE    name space (see #02387)
 02h    BYTE    volume number
 03h    DWORD   directory base
 07h    DWORD   huge mask
 0Bh 16 BYTEs   huge state information
SeeAlso: #02415

Format of NetWare "Read Extended Name Space Info" reply packet:
Offset  Size    Description     (Table 02415)
 00h 16 BYTEs   next huge state information
 10h    DWORD   huge data length
 14h  N BYTEs   huge data
SeeAlso: #02414
--------N-21F257SF1B-------------------------
INT 21 - Novell NetWare - WRITE EXTENDED NAME SPACE INFO
        AX = F257h subfn 1Bh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02416)
        ES:DI -> reply buffer (see #02417)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F257h/SF=17h,AX=F257h/SF=18h,AX=F257h/SF=1Ah

Format of NetWare "Write Extended Name Space Info" request packet:
Offset  Size    Description     (Table 02416)
 00h    BYTE    1Bh (subfunction "Write Extended Name Space Info")
 01h    BYTE    name space (see #02387)
 02h    BYTE    volume number
 03h    DWORD   directory entry number
 07h    DWORD   huge mask
 0Bh 16 BYTEs   huge state information
 1Bh    DWORD   huge data length
 1Fh  N BYTEs   huge data
SeeAlso: #02417

Format of NetWare "Write Extended Name Space Info" request packet:
Offset  Size    Description     (Table 02417)
 00h 16 BYTEs   next huge state information
 10h    DWORD   huge data used
SeeAlso: #02416
--------N-21F257SF1C-------------------------
INT 21 - Novell NetWare - GET NS FULL PATH STRING
        AX = F257h subfn 1Ch
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02418)
        ES:DI -> reply buffer (see #02419)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
Note:   this call returns the path in reverse order (root directory last)
SeeAlso: AH=F2h"Novell",AX=F257h/SF=03h,AX=F257h/SF=15h

Format of NetWare "Get NS Full Path String" request packet:
Offset  Size    Description     (Table 02418)
 00h    BYTE    1Ch (subfunction "Get NS Full Path String")
 01h    BYTE    source name space
 02h    BYTE    destination name space
 03h 10 BYTEs   path cookie (see #02420)
 04h            NetWare Handle/Path structure (see #02376)
SeeAlso: #02419

Format of NetWare "Get NS Full Path String" reply packet:
Offset  Size    Description     (Table 02419)
 00h 10 BYTEs   next path cookie (see #02420)
 0Ah    WORD    size of path component(s) in packet
 0Ch    WORD    number of path components in packet
 0Eh            path components
SeeAlso: #02418

Format of NetWare path cookie:
Offset  Size    Description     (Table 02420)
 00h    WORD    flags
                bit 0: last component is a filename
 02h    DWORD   cookie1
 06h    DWORD   cookie2
Note:   "cookie1" and "cookie2" are to be set to FFFFFFFFh initially; if
          "cookie2" is FFFFFFFFh on return, all path components have been
          transferred
SeeAlso: #02418,#02419
--------N-21F257SF1D-------------------------
INT 21 - Novell NetWare - GET EFFECTIVE DIRECTORY RIGHTS
        AX = F257h subfn 1Dh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02421)
        ES:DI -> reply buffer (see #02422)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AX=F216h/SF=03h,AX=F257h/SF=06h,AX=F257h/SF=0Ch,AX=F257h/SF=15h

Format of NetWare "Get Effective Directory Rights" request packet:
Offset  Size    Description     (Table 02421)
 00h    BYTE    1Dh (subfunction "Get Effective Directory Rights")
 01h    BYTE    name space (see #02387)
 02h    BYTE    destination name space (see #02387)
 03h    WORD    search attributes
 05h    DWORD   return information mask
 09h            NetWare Handle/Path structure (see #02376)
SeeAlso: #02422

Format of NetWare "Get Effective Directory Rights" reply packet:
Offset  Size    Description     (Table 02422)
 00h    WORD    caller's effective rights
 02h            NetWare Information Structure
SeeAlso: #02421
--------N-21F258SF01-------------------------
INT 21 - Novell NetWare v4+ - GET VOLUME AUDITING STATISTICS
        AX = F258h subfn 01h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02423)
        ES:DI -> reply buffer (see #02424)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F268h/SF=C8h

Format of NetWare "Get Volume Auditing Statistics" request buffer:
Offset  Size    Description     (Table 02423)
 00h    BYTE    01h (function "Get Volume Auditing Statistics")
 01h    DWORD   volume
SeeAlso: #02424

Format of NetWare "Get Volume Auditing Statistics" reply buffer:
Offset  Size    Description     (Table 02424)
 00h    WORD    auditing version (date)
 02h    WORD    audit file version (date)
 04h    DWORD   auditing enabled flag
 08h    DWORD   audit file's size
 0Ch    DWORD   audit configuration file's size
 10h    DWORD   maximum audit file size
 14h    DWORD   audit file size threshold
 18h    DWORD   number of audit records
 1Ch    DWORD   number of history records
SeeAlso: #02423,#02476
--------N-21F258SF02-------------------------
INT 21 - Novell NetWare - ADD AUDIT PROPERTY
        AX = F258h subfn 02h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02425)
        ES:DI -> reply buffer (see #02426)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F217h/SF=39h,AX=F258h/SF=06h,AX=F258h/SF=08h

Format of NetWare "Add Audit Property" request packet:
Offset  Size    Description     (Table 02425)
 00h    BYTE    02h (subfunction "Add Audit Property")
        ???
SeeAlso: #02426

Format of NetWare "Add Audit Property" reply packet:
Offset  Size    Description     (Table 02426)
 00h    ???
SeeAlso: #02425
--------N-21F258SF03-------------------------
INT 21 - Novell NetWare - LOGIN AS VOLUME AUDITOR
        AX = F258h subfn 03h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02427)
        ES:DI -> reply buffer (see #02428)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=04h,AX=F258h/SF=0Dh

Format of NetWare "Login As Volume Auditor" request packet:
Offset  Size    Description     (Table 02427)
 00h    BYTE    03h (subfunction "Login As Volume Auditor")
        ???
SeeAlso: #02428

Format of NetWare "Login As Volume Auditor" reply packet:
Offset  Size    Description     (Table 02428)
 00h    ???
SeeAlso: #02427
--------N-21F258SF04-------------------------
INT 21 - Novell NetWare - CHANGE AUDITOR PASSWORD
        AX = F258h subfn 04h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02429)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=03h

Format of NetWare "Change Auditor Password" request packet:
Offset  Size    Description     (Table 02429)
 00h    BYTE    04h (subfunction "Change Auditor Password")
        ???
--------N-21F258SF05-------------------------
INT 21 - Novell NetWare - CHECK AUDIT ACCESS
        AX = F258h subfn 05h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02430)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=02h,AX=F258h/SF=08h

Format of NetWare "Check Audit Access" request packet:
Offset  Size    Description     (Table 02430)
 00h    BYTE    05h (subfunction "Check Audit Access")
        ???
--------N-21F258SF06-------------------------
INT 21 - Novell NetWare - REMOVE AUDIT PROPERTY
        AX = F258h subfn 06h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02431)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=02h,AX=F258h/SF=05h

Format of NetWare "Remove Audit Property" request packet:
Offset  Size    Description     (Table 02431)
 00h    BYTE    06h (subfunction "Remove Audit Property")
        ???
--------N-21F258SF07-------------------------
INT 21 - Novell NetWare - DISABLE AUDITING ON VOLUME
        AX = F258h subfn 07h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02432)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=08h,AX=F258h/SF=09h

Format of NetWare "Disable Auditing on Volume" request packet:
Offset  Size    Description     (Table 02432)
 00h    BYTE    07h (subfunction "Disable Auditing on Volume")
        ???
--------N-21F258SF08-------------------------
INT 21 - Novell NetWare - ENABLE AUDITING ON VOLUME
        AX = F258h subfn 08h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02433)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=07h,AX=F258h/SF=09h

Format of NetWare "Enable Auditing on Volume" request packet:
Offset  Size    Description     (Table 02433)
 00h    BYTE    08h (subfunction "Enable Auditing on Volume")
        ???
--------N-21F258SF09-------------------------
INT 21 - Novell NetWare - IS USER AUDITED?
        AX = F258h subfn 09h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02434)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=07h,AX=F258h/SF=08h

Format of NetWare "Is User Audited?" request packet:
Offset  Size    Description     (Table 02434)
 00h    BYTE    09h (subfunction "Is User Audited?")
        ???
--------N-21F258SF0A-------------------------
INT 21 - Novell NetWare - READ AUDITING BITMAP
        AX = F258h subfn 0Ah
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02435)
        ES:DI -> reply buffer (see #02436)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=0Bh,AX=F258h/SF=10h

Format of NetWare "Read Auditing Bitmap" request packet:
Offset  Size    Description     (Table 02435)
 00h    BYTE    0Ah (subfunction "Read Auditing Bitmap")
        ???
SeeAlso: #02436,#02437

Format of NetWare "Read Auditing Bitmap" reply packet:
Offset  Size    Description     (Table 02436)
 00h    ???
SeeAlso: #02435,#02438
--------N-21F258SF0B-------------------------
INT 21 - Novell NetWare - READ AUDIT CONFIG HEADER
        AX = F258h subfn 0Bh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02437)
        ES:DI -> reply buffer (see #02438)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=0Ah,AX=F258h/SF=11h

Format of NetWare "Read Audit Configuration Header" request packet:
Offset  Size    Description     (Table 02437)
 00h    BYTE    0Bh (subfunction "Read Audit Configuration Header")
        ???
SeeAlso: #02438,#02435

Format of NetWare "Read Audit Configuration Header" reply packet:
Offset  Size    Description     (Table 02438)
 00h    ???
SeeAlso: #02437,#02436
--------N-21F258SF0D-------------------------
INT 21 - Novell NetWare - LOGOUT AS VOLUME AUDITOR
        AX = F258h subfn 0Dh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02439)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=03h

Format of NetWare "Logout as Volume Auditor" request packet:
Offset  Size    Description     (Table 02439)
 00h    BYTE    0Dh (subfunction "Logout as Volume Auditor")
        ???
--------N-21F258SF0E-------------------------
INT 21 - Novell NetWare - RESET AUDITING FILE
        AX = F258h subfn 0Eh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02440)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=0Ah,AX=F258h/SF=0Fh

Format of NetWare "Reset Auditing File" request packet:
Offset  Size    Description     (Table 02440)
 00h    BYTE    0Eh (subfunction "Reset Auditing File")
        ???
--------N-21F258SF0F-------------------------
INT 21 - Novell NetWare - RESET AUDIT HISTORY FILE
        AX = F258h subfn 0Fh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02441)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=0Eh

Format of NetWare "Reset Audit History File" request packet:
Offset  Size    Description     (Table 02441)
 00h    BYTE    0Fh (subfunction "Reset Audit History File")
        ???
--------N-21F258SF10-------------------------
INT 21 - Novell NetWare - WRITE AUDITING BITMAP
        AX = F258h subfn 10h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02442)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=0Ah,AX=F258h/SF=11h

Format of NetWare "Write Auditing Bitmap" request packet:
Offset  Size    Description     (Table 02442)
 00h    BYTE    10h (subfunction "Write Auditing Bitmap")
        ???
SeeAlso: #02443
--------N-21F258SF11-------------------------
INT 21 - Novell NetWare - WRITE AUDIT CONFIG HEADER
        AX = F258h subfn 11h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02443)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=0Bh,AX=F258h/SF=10h

Format of NetWare "Write Audit Configuration Header" request packet:
Offset  Size    Description     (Table 02443)
 00h    BYTE    11h (subfunction "Write Audit Configuration Header")
        ???
SeeAlso: #02442
--------N-21F258SF13-------------------------
INT 21 - Novell NetWare - GET AUDITING FLAGS
        AX = F258h subfn 13h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02444)
        ES:DI -> reply buffer (see #02445)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=05h

Format of NetWare "Get Auditing Flags" request packet:
Offset  Size    Description     (Table 02444)
 00h    BYTE    13h (subfunction "Get Auditing Flags")
        ???
SeeAlso: #02445

Format of NetWare "Get Auditing Flags" reply packet:
Offset  Size    Description     (Table 02445)
 00h    ???
SeeAlso: #02444
--------N-21F258SF14-------------------------
INT 21 - Novell NetWare - CLOSE OLD AUDITING FILE
        AX = F258h subfn 14h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02446)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=15h

Format of NetWare "Close Old Auditing File" request packet:
Offset  Size    Description     (Table 02446)
 00h    BYTE    14h (subfunction "Close Old Auditing File")
        ???
SeeAlso: #02447
--------N-21F258SF15-------------------------
INT 21 - Novell NetWare - DELETE OLD AUDITING FILE
        AX = F258h subfn 15h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02447)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=14h

Format of NetWare "Delete Old Auditing File" request packet:
Offset  Size    Description     (Table 02447)
 00h    BYTE    15h (subfunction "Delete Old Auditing File")
        ???
SeeAlso: #02446
--------N-21F258SF16-------------------------
INT 21 - Novell NetWare - CHECK AUDIT LEVEL TWO ACCESS
        AX = F258h subfn 16h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02448)
        ES:DI -> reply buffer
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F258h/SF=05h

Format of NetWare "Check Audit Level Two Access" request packet:
Offset  Size    Description     (Table 02448)
 00h    BYTE    16h (subfunction "Check Audit Level Two Access")
        ???
--------N-21F25ASF01-------------------------
INT 21 - Novell NetWare - GET DATA MIGRATION INFO
        AX = F25Ah subfn 01h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02449)
        ES:DI -> reply buffer (see #02450)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F25Ah/SF=80h,AX=F25Ah/SF=86h

Format of NetWare "Get Data Migration Information" request packet:
Offset  Size    Description     (Table 02449)
 00h    WORD    length of following data
 02h    BYTE    01h (subfunction "Get Data Migration Information")
SeeAlso: #02450

Format of NetWare "Get Data Migration Information" reply packet:
Offset  Size    Description     (Table 02450)
 00h    ???
SeeAlso: #02449
--------N-21F25ASF80-------------------------
INT 21 - Novell NetWare - MOVE FILE DATA TO DATA MIGRATION
        AX = F25Ah subfn 80h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02451)
        ES:DI -> reply buffer (see #02452)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F25Ah/SF=82h,AX=F25Ah/SF=85h

Format of NetWare "Move File Data to Data Migration" request packet:
Offset  Size    Description     (Table 02451)
 00h    WORD    length of following data
 02h    BYTE    80h (subfunction "Move File Data to Data Migration")
 03h    DWORD   volume number
 07h    DWORD   directory entry number
 0Bh    DWORD   name space (see #02387)
 0Fh    DWORD   support module ID
 13h    DWORD   save key flag
                00000010h to save key when file is demigrated
SeeAlso: #02452

Format of NetWare "Move File Data to Data Migration" reply packet:
Offset  Size    Description     (Table 02452)
 00h    DWORD   volume-unique ID
SeeAlso: #02451
--------N-21F25ASF81-------------------------
INT 21 - Novell NetWare - DATA MIGRATION FILE INFORMATION
        AX = F25Ah subfn 81h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02453)
        ES:DI -> reply buffer (see #02454)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F25Ah/SF=80h,AX=F25Ah/SF=82h,AX=F25Ah/SF=83h

Format of NetWare "Data Migration File Information" request packet:
Offset  Size    Description     (Table 02453)
 00h    WORD    length of following data
 02h    BYTE    81h (subfunction "Data Migration File Information")
 03h    DWORD   volume number
 07h    DWORD   directory entry number
 0Bh    DWORD   name space (see #02387)
SeeAlso: #02454

Format of NetWare "Data Migration File Information" reply packet:
Offset  Size    Description     (Table 02454)
 00h    DWORD   support module ID
 04h    DWORD   estimate restoration time
 08h    DWORD   bitmask of supported data streams
SeeAlso: #02453
--------N-21F25ASF82-------------------------
INT 21 - Novell NetWare - VOLUME DATA MIGRATION STATUS
        AX = F25Ah subfn 82h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02455)
        ES:DI -> reply buffer (see #02456)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F25Ah/SF=01h,AX=F25Ah/SF=83h,AX=F25Ah/SF=84h

Format of NetWare "Volume Data Migration Status" request packet:
Offset  Size    Description     (Table 02455)
 00h    WORD    length of following data
 02h    BYTE    82h (subfunction "Volume Data Migration Status")
 03h    DWORD   volume number
 07h    DWORD   support module ID
SeeAlso: #02456

Format of NetWare "Volume Data Migration Status" request packet:
Offset  Size    Description     (Table 02456)
 00h    DWORD   number of migrated files
 04h    DWORD   total size required to restore all migrated files
 08h    DWORD   total space used on migration device
 0Ch    DWORD   limbo space (demigrated files with save-key flag set)
 10h    DWORD   total space including limbo space
 14h    DWORD   number of files in limbo
SeeAlso: #02455
--------N-21F25ASF83-------------------------
INT 21 - Novell NetWare - GET MIGRATION OR STATUS INFORMATION
        AX = F25Ah subfn 83h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02457)
        ES:DI -> reply buffer (see #02458)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F25Ah/SF=82h,AX=F25Ah/SF=84h,AX=F25Ah/SF=85h

Format of NetWare "Get Migration or Status Information" request packet:
Offset  Size    Description     (Table 02457)
 00h    WORD    length of following data
 02h    BYTE    83h (subfunction "Get Migration or Status Information")
SeeAlso: #02458

Format of NetWare "Get Migration or Status Information" request packet:
Offset  Size    Description     (Table 02458)
 00h    DWORD   presence flag
                FFFFFFFFh if Data Migration NLM is loaded and running
 04h    DWORD   major version
 08h    DWORD   minor version
 0Ch    DWORD   flag: has support module registered with Data Migrator?
SeeAlso: #02457
--------N-21F25ASF84-------------------------
INT 21 - Novell NetWare - DATA MIGRATION SUPPORT MODULE INFORMATION
        AX = F25Ah subfn 84h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02459)
        ES:DI -> reply buffer (see #02460)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F25Ah/SF=82h,AX=F25Ah/SF=83h,AX=F25Ah/SF=86h

Format of NetWare "Data Migration Support Module Information" request packet:
Offset  Size    Description     (Table 02459)
 00h    WORD    length of following data
 02h    BYTE    84h (subfunction "Data Migration Support Module Information")
 03h    DWORD   information level
                0000h get data migration NLM info
                0001h get loaded support modules
                0002h get name of support module
 07h    DWORD   support module ID
SeeAlso: #02460

Format of NetWare "Data Migration Support Module Information" request packet:
Offset  Size    Description     (Table 02460)
---information level 0---
 00h    DWORD   read/write access status
 04h    DWORD   length of Specific Device Information block (max 384)
 08h    DWORD   space available on support module
 0Ch    DWORD   amount of space used
 10h    BYTE    length of support module's name
 11h 14 BYTEs   support module name
 1Fh 128 BYTEs  support module information
---information level 1---
 00h    DWORD   number of support modules
 04h 32 BYTEs   support module IDs
---information level 2---
 00h    BYTE    length of module name
 01h 32 BYTEs   support module name
SeeAlso: #02459
--------N-21F25ASF85-------------------------
INT 21 - Novell NetWare - MOVE FILE DATA FROM DATA MIGRATION
        AX = F25Ah subfn 85h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02461)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F25Ah/SF=80h,AX=F25Ah/SF=83h,AX=F25Ah/SF=86h

Format of NetWare "Move File Data From Data Migration" request packet:
Offset  Size    Description     (Table 02461)
 00h    WORD    length of following data
 02h    BYTE    85h (subfunction "Move File Data from Data Migration")
 03h    DWORD   volume number
 07h    DWORD   directory entry number
 0Bh    DWORD   name space (see #02387)
SeeAlso: #02452
--------N-21F25ASF86-------------------------
INT 21 - Novell NetWare - GET OR SET DEFAULT SUPPORT MODULE
        AX = F25Ah subfn 86h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02462)
        ES:DI -> reply buffer (see #02463)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F25Ah/SF=01h,AX=F25Ah/SF=80h,AX=F25Ah/SF=84h

Format of NetWare "Get or Set Default Support Module" request packet:
Offset  Size    Description     (Table 02462)
 00h    WORD    length of following data
 02h    BYTE    86h (subfunction "Get or Set Default Support Module")
 03h    DWORD   direction
                00h get default support module
                01h set default support module
 07h    DWORD   new module ID if setting
SeeAlso: #02463

Format of NetWare "Get or Set Default Support Module" request packet:
Offset  Size    Description     (Table 02463)
 00h    DWORD   support module ID
SeeAlso: #02462
--------N-21F268SF01-------------------------
INT 21 - Novell NetWare v4+ - GET TREE NAME
        AX = F268h subfn 01h
        CX = length of request buffer in bytes (0001h)
        DX = length of reply buffer in bytes (0064h)
        DS:SI -> request buffer (see #02464)
        ES:DI -> reply buffer (see #02465)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F268h/SF=04h

Format of NetWare "Get Tree Name" request buffer:
Offset  Size    Description     (Table 02464)
 00h    BYTE    01h (subfunction "Get Tree Name")

Format of NetWare "Get Tree Name" reply buffer:
Offset  Size    Description     (Table 02465)
 00h    DWORD   Ping version
 04h    DWORD   length of tree name
 08h 32 BYTEs   tree name, padded with underscores ('_')
 28h 60 BYTEs   ???
--------N-21F268SF04-------------------------
INT 21 - Novell NetWare v4+ - GET BINDERY CONTEXT
        AX = F268h subfn 04h
        CX = length of request buffer in bytes (0001h)
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02466)
        ES:DI -> reply buffer (see #02467)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F268h/SF=01h,AX=F268h/SF=C8h

Format of NetWare "Get Bindery Context" request buffer:
Offset  Size    Description     (Table 02466)
 00h    BYTE    04h (subfunction "Get Bindery Context")

Format of NetWare "Get Bindery Context" reply buffer:
Offset  Size    Description     (Table 02467)
 00h    DWORD   length (max 200)
 04h  N WORDs   Unicode bindery context string
--------N-21F268SF05-------------------------
INT 21 - Novell NetWare v4+ - MONITOR NDS CONNECTION
        AX = F268h subfn 05h
        CX = length of request buffer in bytes (0001h)
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02468)
        ES:DI -> reply buffer (unused???)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)

Format of NetWare "Monitor NDS Connection" request buffer:
Offset  Size    Description     (Table 02468)
 00h    BYTE    05h (subfunction "Monitor NDS Connection"
--------N-21F268SF16-------------------------
INT 21 - Novell NetWare v4+ - NDS LIST PARTITIONS
        AX = F268h subfn 16h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02469)
        ES:DI -> reply buffer (see #02470)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
Note:   the length specified in CX must be exactly 13 bytes more than the
          length field at offset 09h in the request buffer for this function
          to be successful
SeeAlso: AX=F268h/SF=35h

Format of NetWare "NDS List Partitions" request buffer:
Offset  Size    Description     (Table 02469)
 00h    BYTE    02h
 01h    DWORD   ??? (FFFFFFFFh)
 05h    DWORD   ??? (00000202h)
 09h    DWORD   length (00000018h)
 0Dh    DWORD   ??? (00000000h)
 11h    DWORD   function (00000016h) (subfunction "NDS List Partitions")
 15h    DWORD   ??? (00000400h)
 19h    DWORD   API version (00000000h)
 1Dh    DWORD   ??? (00000000h)
 21h    DWORD   iteration (FFFFFFFFh)
SeeAlso: #02470,#02471

Format of NetWare "NDS List Partitions" reply buffer:
Offset  Size    Description     (Table 02470)
 00h    DWORD   length
 04h    DWORD   ???
 08h    DWORD   return code
 0Ch    DWORD   iteration
 10h 1000 BYTEs returned data
SeeAlso: #02469
--------N-21F268SF35-------------------------
INT 21 - Novell NetWare v4+ - NDS GET SERVER NAME AND ADDRESS
        AX = F268h subfn 35h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02471)
        ES:DI -> reply buffer (see #02472)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
Note:   the length specified in CX must be exactly 13 bytes more than the
          length field at offset 09h in the request buffer for this function
          to be successful
SeeAlso: AX=F268h/SF=16h

Format of NetWare "NDS Get Server Name and Address" request buffer:
Offset  Size    Description     (Table 02471)
 00h    BYTE    02h
 01h    DWORD   ??? (FFFFFFFFh)
 05h    DWORD   ??? (00000202h)
 09h    DWORD   length (0000000Ch)
 0Dh    DWORD   ??? (00000000h)
 11h    DWORD   function (00000035h) (subfunc "NDS Get Server Name and Addr")
 15h    DWORD   ??? (00000400h)
SeeAlso: #02469,#02472

Format of NetWare "NDS Get Server Name and Address" reply buffer:
Offset  Size    Description     (Table 02472)
 00h    DWORD   length
 04h    DWORD   ???
 08h    DWORD   return code
 0Ch    DWORD   length of name
 10h  N WORDs   Unicode server name string
        var     padding
        DWORD   ??? (00000001h)
        DWORD   ??? (00000000h)
        DWORD   ??? (0000000Ch)
     12 BYTEs   server's IPX address
SeeAlso: #02471
--------N-21F268SF3D-------------------------
INT 21 - Novell NetWare v4+ - NDS LOGOUT
        AX = F268h subfn 3Dh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02473)
        ES:DI -> reply buffer (see #02474)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F217h/SF=14h

Format of NetWare "NDS Logout" request buffer:
Offset  Size    Description     (Table 02473)
 00h    BYTE    02h
 01h    DWORD   ??? (FFFFFFFFh)
 05h    DWORD   ??? (00000202h)
 09h    DWORD   length (0000000Ch)
 0Dh    DWORD   ??? (00000000h)
 11h    DWORD   function (0000003Dh) (subfunction "NDS Logout")
 15h    DWORD   ??? (00000000h)
SeeAlso: #02474

Format of NetWare "NDS Logout" reply buffer:
Offset  Size    Description     (Table 02474)
 00h    DWORD   length
 04h    DWORD   ???
 08h    DWORD   return code
SeeAlso: #02473
--------N-21F268SFC8-------------------------
INT 21 - Novell NetWare v4+ - GET DS AUDITING STATISTICS
        AX = F268h subfn C8h
        CX = length of request buffer in bytes (0001h)
        DX = length of reply buffer in bytes (0020h)
        DS:SI -> request buffer (see #02475)
        ES:DI -> reply buffer (see #02476)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F258h/SF=01h,AX=F268h/SF=01h,AX=F268h/SF=04h

Format of NetWare "Get DS Auditing Statistics" request buffer:
Offset  Size    Description     (Table 02475)
 00h    BYTE    C8h (subfunction "Get DS Auditing Statistics")
SeeAlso: #02476

Format of NetWare "Get DS Auditing Statistics" reply buffer:
Offset  Size    Description     (Table 02476)
 00h    WORD    auditing version (date)
 02h    WORD    audit file version (date)
 04h    DWORD   auditing enabled flag
 08h    DWORD   audit file's size
 0Ch    DWORD   audit configuration file's size
 10h    DWORD   maximum audit file size
 14h    DWORD   audit file size threshold
 18h    DWORD   number of audit records
 1Ch    DWORD   number of history records
SeeAlso: #02424,#02475
--------N-21F269-----------------------------
INT 21 - Novell NetWare - LOG FILE
        AX = F269h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02477)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F203h,AX=F26Ah,AH=EBh"NetWare"

Format of NetWare "Log File" request packet:
Offset  Size    Description     (Table 02477)
 00h    BYTE    directory handle
 01h    BYTE    lock flag
                00h log only
                01h log and lock
 02h    WORD    lock timeout in clock ticks (0000h = don't wait)
 04h    BYTE    length of filename
 05h  N BYTEs   filename
--------N-21F26A-----------------------------
INT 21 - Novell NetWare - LOCK FILE SET
        AX = F26Ah
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02478)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F204h,AX=F269h,AH=CBh"NetWare"

Format of NetWare "Lock File Set" request packet:
Offset  Size    Description     (Table 02478)
 00h    WORD    lock timeout in clock ticks (0000h = don't wait)
--------N-21F26C-----------------------------
INT 21 - Novell NetWare - LOCK LOGICAL RECORD SET
        AX = F26Ch
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02479)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F20Ah,AX=F26Ah,AH=CBh"NetWare"

Format of NetWare "Lock Logical Record Set" request packet:
Offset  Size    Description     (Table 02479)
 00h    BYTE    lock flag
                00h shareable lock
                01h exclusive lock
 01h    WORD    lock timeout in clock ticks (0000h = don't wait)
--------N-21F26E-----------------------------
INT 21 - Novell NetWare - LOCK PHYSICAL RECORD SET
        AX = F26Eh
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02480)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F21Bh,AX=F26Ch,AH=C2h"NetWare"

Format of NetWare "Lock Physical Record Set" request packet:
Offset  Size    Description     (Table 02480)
 00h    BYTE    lock flag
                00h exclusive lock
                02h shareable lock
 01h    WORD    lock timeout in clock ticks (0000h = don't wait)
--------N-21F26FSF00-------------------------
INT 21 - Novell NetWare - OPEN SEMAPHORE
        AX = F26Fh subfn 00h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02481)
        ES:DI -> reply buffer (see #02482)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F26Fh/SF=01h,AX=F26Fh/SF=02h

Format of NetWare "Open Semaphore" request packet:
Offset  Size    Description     (Table 02481)
 00h    BYTE    00h (subfunction "Open Semaphore")
 01h    BYTE    initial semaphore value
 02h    BYTE    length of semaphore's name
 03h  N BYTEs   semaphore name
SeeAlso: #02482

Format of NetWare "Open Semaphore" request packet:
Offset  Size    Description     (Table 02482)
 00h    DWORD   semaphore handle
 04h    BYTE    number of clients using semaphore (including caller)
SeeAlso: #02481
--------N-21F26FSF01-------------------------
INT 21 - Novell NetWare - CLOSE SEMAPHORE
        AX = F26Fh subfn 01h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02483)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F26Fh/SF=00h,AX=F26Fh/SF=03h,AX=F220h/SF=04h

Format of NetWare "Close Semaphore" request packet:
Offset  Size    Description     (Table 02483)
 00h    BYTE    01h (subfunction "Close Semaphore")
 01h    DWORD   semaphore handle
SeeAlso: #02286
--------N-21F26FSF02-------------------------
INT 21 - Novell NetWare - WAIT ON SEMAPHORE
        AX = F26Fh subfn 02h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02484)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F26Fh/SF=00h,AX=F26Fh/SF=04h

Format of NetWare "Wait on Semaphore" request packet:
Offset  Size    Description     (Table 02484)
 00h    BYTE    02h (subfunction "Wait on Semaphore")
 01h    DWORD   semaphore handle
 05h    WORD    timeout in clock ticks (0000h = no wait)
--------N-21F26FSF03-------------------------
INT 21 - Novell NetWare - SIGNAL SEMAPHORE
        AX = F26Fh subfn 03h
        CX = length of request packet in bytes
        DX = 0000h (no reply packet)
        DS:SI -> request packet (see #02485)
        ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F26Fh/SF=02h,AX=F26Fh/SF=04h

Format of NetWare "Signal Semaphore" request packet:
Offset  Size    Description     (Table 02485)
 00h    BYTE    03h (subfunction "Signal Semaphore")
 01h    DWORD   semaphore handle
--------N-21F26FSF04-------------------------
INT 21 - Novell NetWare - EXAMINE SEMAPHORE
        AX = F26Fh subfn 04h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02486)
        ES:DI -> reply buffer (see #02487)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F26Fh/SF=02h,AX=F26Fh/SF=03h

Format of NetWare "Examine Semaphore" request packet:
Offset  Size    Description     (Table 02486)
 00h    BYTE    04h (subfunction "Examine Semaphore")
 01h    DWORD   semaphore handle
SeeAlso: #02487

Format of NetWare "Examine Semaphore" reply packet:
Offset  Size    Description     (Table 02487)
 00h    BYTE    semaphore's current value
 01h    BYTE    number of clients using semaphore
SeeAlso: #02486
--------N-21F272-----------------------------
INT 21 - Novell NetWare v4+ - GET FILE SERVER UTC TIME
        AX = F272h
        CX = length of request buffer in bytes (0003h)
        DX = length of reply buffer in bytes (0064h)
        DS:SI -> request buffer (see #02488)
        ES:DI -> reply buffer (see #02489)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled

Format of NetWare "Get File Server UTC Time" request buffer:
Offset  Size    Description     (Table 02488)
 00h    BYTE    ??? (00h)
 01h    BYTE    ??? (01h)
 02h    BYTE    ??? (01h)
SeeAlso: #02489

Format of NetWare "Get File Server UTC Time" reply buffer:
Offset  Size    Description     (Table 02489)
 00h    DWORD   seconds
 04h    DWORD   ???
 04h    DWORD   ??? (00000204h)
 04h    DWORD   ??? (00000000h)
 04h    DWORD   ??? (00000000h)
 04h    DWORD   ??? (FFFFFFFFh)
 04h    DWORD   ??? (00000000h)
SeeAlso: #02488
--------N-21F27BSF01-------------------------
INT 21 - Novell NetWare v4+ - GET CACHE INFORMATION
        AX = F27Bh subfn 01h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02490)
        ES:DI -> reply buffer (see #02491)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F27Bh/SF=02h

Format of NetWare "Get Cache Information" request buffer:
Offset  Size    Description     (Table 02490)
 00h    WORD    0001h (length of following data)
 02h    BYTE    01h (subfunction "Get Cache Information")
SeeAlso: #02491

Format of NetWare "Get Cache Information" reply buffer:
Offset  Size    Description     (Table 02491)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    DWORD   "readExistingBlockCount"
 0Ch    DWORD   "readExistingWriteWaitCount"
 10h    DWORD   "readExistingPartialReadCount"
 14h    DWORD   "readExistingReadErrorCount"
 18h    DWORD   "writeBlockCount"
 1Ch    DWORD   "writeEntireBlockCount"
 20h    DWORD   "getDiskCount"
 24h    DWORD   "getDiskNeedToAllocCount"
 28h    DWORD   "getDiskSomeoneBeatMeCount"
 2Ch    DWORD   "getDiskPartialReadCount"
 30h    DWORD   "getDiskReadErrorCount"
 34h    DWORD   "getAsyncDiskCount"
 38h    DWORD   "getAsyncDiskNeedToAlloc"
 3Ch    DWORD   "getAsyncDiskSomeoneBeatMe"
 40h    DWORD   "errorDoingAsyncReadCount"
 44h    DWORD   "getDiskNoReadCount"
 48h    DWORD   "getDiskNoReadAllocCount"
 4Ch    DWORD   "getDiskNoReadSomeoneBeatMeCount"
 50h    DWORD   "diskWriteCount"
 54h    DWORD   "diskWriteAllocCount"
 58h    DWORD   "diskWriteSomeoneBeatMeCount"
 5Ch    DWORD   "writeErrorCount"
 60h    DWORD   "waitOnSemaphoreCount"
 64h    DWORD   "allocBlockWaitForSomeoneCount"
 68h    DWORD   "allocBlockCount"
 6Ch    DWORD   "allocBlockWaitCount"
 70h    DWORD   original number of cache buffers
 74h    DWORD   current number of cache buffers
 78h    DWORD   cache dirty-block threshold
 7Ch    DWORD   "waitNodeCount"
 80h    DWORD   "waitNodeAllocFailureCount"
 84h    DWORD   "moveCacheNodeCount"
 88h    DWORD   "moveCacheNodeFromAvailCount"
 8Ch    DWORD   "accelerateCacheNodeWriteCount"
 90h    DWORD   "removeCacheNodeCount"
 94h    DWORD   "removeCacheNodeFromAvailCount"
 98h    DWORD   number of cache checks
 9Ch    DWORD   number of cache hits
 A0h    DWORD   number of dirty-cache checks
 A4h    DWORD   number of dirty-cache hits
 A8h    DWORD   "cacheUsedWhileChecking"
 ACh    DWORD   "waitForDirtyBlocksDecreaseCount"
 B0h    DWORD   "allocBlockFromAvailCount"
 B4h    DWORD   "allocBlockFromLRUCount"
 B8h    DWORD   "allocBlockAlreadyWaiting"
 BCh    DWORD   "LRUSittingTime"
 C0h    DWORD   maximum byte count
 C4h    DWORD   minimum number of cache buffers
 C8h    DWORD   minimum cache report threshold
 D0h    DWORD   "allocWaitingCount"
 D4h    DWORD   number of dirty cache blocks
 D8h    DWORD   "cacheDirtyWaitTime"
 DCh    DWORD   "maxDirtyTime"
 E0h    DWORD   number of directory cache buffers
 E4h    DWORD   "cacheByteToBlockShiftFactor"
SeeAlso: #02490
--------N-21F27BSF02-------------------------
INT 21 - Novell NetWare v4+ - GET SERVER INFORMATION
        AX = F27Bh subfn 02h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02492)
        ES:DI -> reply buffer (see #02493)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F27Bh/SF=01h

Format of NetWare "Get Server Information" request buffer:
Offset  Size    Description     (Table 02492)
 00h    WORD    0001h (length of following data)
 02h    BYTE    02h (subfunction "Get Server Information")
SeeAlso: #02493

Format of NetWare "Get Server Information" reply buffer:
Offset  Size    Description     (Table 02493)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    DWORD   current NCP stations in use
 0Ch    DWORD   peak NCP stations in use
 10h    DWORD   total NCP requests
 14h    DWORD   server utilization
 18h    DWORD   number of cancelled replies
 1Ch    DWORD   "writeHeldOffCount"
 20h    DWORD   "writeHeldOffWithDuplicateRequest"
 24h    DWORD   number of invalid request types
 28h    DWORD   "beingAbortedCount"
 2Ch    DWORD   "alreadyDoingReallocCount"
 30h    DWORD   "deAllocInvalidSlotCount"
 34h    DWORD   "deAllocBeingProcessedCount"
 38h    DWORD   "deAllocForgedPacketCount"
 3Ch    DWORD   "startStationErrorCount"
 40h    DWORD   number of invalid slot numbers
 44h    DWORD   "beingProcessedCount"
 48h    DWORD   number of forged packets
 4Ch    DWORD   number still transmitting
 50h    DWORD   "reExecuteRequestCount"
 54h    DWORD   number of invalid sequence numbers
 58h    DWORD   "duplicateIsBeingSentAlreadyCnt"
 5Ch    DWORD   number of positive acknowledgements sent
 60h    DWORD   number of duplicate replies sent
 64h    DWORD   number of times out of memory for station control
 68h    DWORD   number of times out of available connections
 6Ch    DWORD   "reallocSlotCount"
 70h    DWORD   "reallocSlotCameTooSoonCount"
 74h    WORD    number of times maximum hop count exceeded
 76h    WORD    number of unknown networks
 78h    WORD    "NoSpaceForService"
 7Ah    WORD    number of times out of receive buffers
 7Ch    WORD    "notMyNetwork"
 7Eh    DWORD   number of NetBIOS packets propagated
 82h    DWORD   total number of packets serviced
 86h    DWORD   total number of packets routed
SeeAlso: #02492
--------N-21F27BSF04-------------------------
INT 21 - Novell NetWare v4+ - GET USER INFORMATION
        AX = F27Bh subfn 04h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02494)
        ES:DI -> reply buffer (see #02495)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled

Format of NetWare "Get User Information" request buffer:
Offset  Size    Description     (Table 02494)
 00h    WORD    0005h (length of following data)
 02h    BYTE    04h (subfunction "Get User Information")
 03h    DWORD   connection number
SeeAlso: #02495

Format of NetWare "Get User Information" reply buffer:
Offset  Size    Description     (Table 02495)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    DWORD   connection number
 0Ch    DWORD   use count
 10h    BYTE    connection service type
 11h  7 BYTEs   login time
 18h    DWORD   status
 1Ch    DWORD   expiration time
 20h    DWORD   object type
 24h    BYTE    transaction flag
 25h    BYTE    logical lock threshold
 26h    BYTE    record lock threshold
 27h    BYTE    file write flags
 28h    BYTE    file write state
 29h    BYTE    (filler)
 2Ah    WORD    file lock count
 2Ch    WORD    record lock count
 2Eh  6 BYTEs   total number of bytes read
 34h  6 BYTEs   total number of bytes written
 3Ah    DWORD   total requests
 3Eh    DWORD   held requests
 42h  6 BYTEs   held bytes read
 48h  6 BYTEs   held bytes written
 4Eh    BYTE    length of user name
 4Fh  N BYTEs   user name
SeeAlso: #02494
--------N-21F27BSF06-------------------------
INT 21 - Novell NetWare v4+ - GET IPX/SPX Information
        AX = F27Bh subfn 06h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02496)
        ES:DI -> reply buffer (see #02497)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled

Format of NetWare "Get IPX/SPX Information" request buffer:
Offset  Size    Description     (Table 02496)
 00h    WORD    0001h (length of following data)
 02h    BYTE    06h (subfunction "Get IPX/SPX Information")
SeeAlso: #02497

Format of NetWare "Get IPX/SPX Information" reply buffer:
Offset  Size    Description     (Table 02497)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    DWORD   number of IPX packets sent
 0Ch    WORD    number of malformed IPX packets
 0Eh    DWORD   number of IPX Get-ECB requests
 12h    DWORD   number of failed IPX Get-ECB requests
 16h    DWORD   number of IPX AES events
 1Ah    WORD    number of postponed IPX AES events
 1Ch    WORD    maximum number of sockets (from configuration)
 1Eh    WORD    maximum number of open sockets
 20h    WORD    number of failed IPX socket opens
 22h    DWORD   number of IPX "listen" ECBs
 24h    WORD    number of failed IPX EBC cancels
 26h    WORD    number of failed IPX Get-Local-Target requests
 28h    WORD    maximum number of SPX connections (from configuration)
 2Ah    WORD    maximum number of SPX connections used
 2Ch    WORD    number of SPX Establish-Connection requests
 2Eh    WORD    number of failed SPX Establish-Connection requests
 30h    WORD    total number of SPX "listen-connect" requests
 32h    WORD    number of failed SPX "listen-connect" requests
 34h    DWORD   number of SPX sends
 38h    DWORD   number of SPX "window-choke"s
 3Ch    WORD    number of bad SPX sends
 3Eh    WORD    number of failed SPX sends
 40h    WORD    number of aborted SPX connections
 42h    DWORD   number of SPX packet listens
 46h    WORD    number of bad SPX packet listens
 48h    DWORD   number of incoming SPX packets
 4Ch    WORD    number of bad incoming SPX packets
 4Eh    WORD    number of supressed SPX packets
 50h    WORD    "SPXNoSesListenECBCount"
 52h    WORD    "SPXWatchDogDestSesCount"
SeeAlso: #02496
--------N-21F27BSF08-------------------------
INT 21 - Novell NetWare v4+ - GET CPU INFORMATION
        AX = F27Bh subfn 08h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02498)
        ES:DI -> reply buffer (see #02499)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled

Format of NetWare "Get CPU Information" request buffer:
Offset  Size    Description     (Table 02498)
 00h    WORD    0005h (length of following data)
 02h    BYTE    08h (subfunction "Get CPU Information")
 03h    DWORD   CPU number
SeeAlso: #02499

Format of NetWare "Get CPU Information" reply buffer:
Offset  Size    Description     (Table 02499)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    DWORD   number of CPUs
 0Ch    DWORD   page table owner flag
 10h    DWORD   CPU type flag
 14h    DWORD   coprocessor flag
 18h    DWORD   bus type flag
 1Ch    DWORD   I/O engine flag
 20h    DWORD   filesystem engine flag
 24h    DWORD   non-dedicated flag
 28h 201 BYTEs  counted string: CPU string;number of coprocessors;bus string
SeeAlso: #02498
--------N-21F27BSF09-------------------------
INT 21 - Novell NetWare v4+ - GET VOLUME SWITCH INFORMATION
        AX = F27Bh subfn 09h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02500)
        ES:DI -> reply buffer (see #02501)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled

Format of NetWare "Get Volume Switch Information" request buffer:
Offset  Size    Description     (Table 02500)
 00h    WORD    0005h (length of following data)
 02h    BYTE    09h (subfunction "Get Volume Switch Information")
 03h    DWORD   starting item number
SeeAlso: #02501

Format of NetWare "Get Volume Switch Information" reply buffer:
Offset  Size    Description     (Table 02501)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    DWORD   total LFS counters
 0Ch    DWORD   current LFS counters
 10h    DWORD   "readFile"
 14h    DWORD   "writeFile"
 18h    DWORD   "deleteFile"
 1Ch    DWORD   "renMove"
 20h    DWORD   "openFile"
 24h    DWORD   "createFile"
 28h    DWORD   "createAndOpenFile"
 2Ch    DWORD   "closeFile"
 30h    DWORD   "scanDeleteFile"
 34h    DWORD   "salvageFile"
 38h    DWORD   "purgeFile"
 3Ch    DWORD   "migrateFile"
 40h    DWORD   "deMigrateFile"
 44h    DWORD   "createDir"
 48h    DWORD   "deleteDir"
 4Ch    DWORD   "directoryScans"
 50h    DWORD   "mapPathToDirNum"
 54h    DWORD   "modifyDirEntry"
 58h    DWORD   "getAccessRights"
 5Ch    DWORD   "getAccessRightsFromIDs"
 60h    DWORD   "mapDirNumToPath"
 64h    DWORD   "getEntryFromPathStrBase"
 68h    DWORD   "getOtherNSEntry"
 6Ch    DWORD   "getExtDirInfo"
 70h    DWORD   "getParentDirNum"
 74h    DWORD   "addTrusteeR"
 78h    DWORD   "scanTrusteeR"
 7Ch    DWORD   "delTrusteeR"
 80h    DWORD   "purgeTrust"
 84h    DWORD   "findNextTrustRef"
 88h    DWORD   "scanUserRestNodes"
 8Ch    DWORD   "addUserRest"
 90h    DWORD   "deleteUserRest"
 94h    DWORD   "rtnDirSpaceRest"
 98h    DWORD   "getActualAvailDskSp"
 9Ch    DWORD   "cntOwnedFilesAndDirs"
 A0h    DWORD   "migFileInfo"
 A4h    DWORD   "volMigInfo"
 A8h    DWORD   "readMigFileData"
 ACh    DWORD   "getVolusageStats"
 B0h    DWORD   "getActualVolUsageStats"
 B4h    DWORD   "getDirUsageStats"
 B8h    DWORD   "NMFileReadsCount"
 BCh    DWORD   "NMFileWritesCount"
 C0h    DWORD   "mapPathToDirNumOrPhantom"
 C4h    DWORD   "stationsHasAccessRgtsGntedBelow"
 C8h    DWORD   "gtDataSteamLensFromPathStrBase"
 CCh    DWORD   "checkAndGetDirectoryEntry"
 D0h    DWORD   "getDeletedEntry"
 D4h    DWORD   "getOriginalNameSpace"
 D8h    DWORD   "getActualFileSize"
 DCh    DWORD   "verifyNameSpaceNumber"
 E0h    DWORD   "verifyDataStreamNumber"
 E4h    DWORD   "checkVolumeNumber"
 E8h    DWORD   "commitFile"
 ECh    DWORD   "VMGetDirectoryEntry"
 F0h    DWORD   "createDMFileEntry"
 F4h    DWORD   "renameNameSpaceEntry"
 F8h    DWORD   "logFile"
 FCh    DWORD   "releaseFile"
100h    DWORD   "clearFile"
104h    DWORD   "setVolumeFlag"
108h    DWORD   "clearVolumeFlag"
10Ch    DWORD   "getOriginalInfo"
110h    DWORD   "createMigratedDir"
114h    DWORD   "F3OpenCreate"
118h    DWORD   "F3InitFileSearch"
11Ch    DWORD   "F3ContinueFileSearch"
120h    DWORD   "F3RenameFile"
124h    DWORD   "F3ScanForTrustees"
128h    DWORD   "F3ObtainFileInfo"
12Ch    DWORD   "F3ModifyInfo"
130h    DWORD   "F3EraseFile"
134h    DWORD   "F3SetDirHandle"
138h    DWORD   "F3AddTrustees"
13Ch    DWORD   "F3DeleteTrustees"
140h    DWORD   "F3AllocDirHandle"
144h    DWORD   "F3ScanSalvagedFiles"
148h    DWORD   "F3RecoverSalvagedFiles"
14Ch    DWORD   "F3PurgeSalvageableFile"
150h    DWORD   "F3GetNSSpecificInfo"
154h    DWORD   "F3ModifyNSSpecificInfo"
158h    DWORD   "F3SearchSet"
15Ch    DWORD   "F3GetDirBase"
160h    DWORD   "F3QueryNameSpaceInfo"
164h    DWORD   "F3GetNameSpaceList"
168h    DWORD   "F3GetHugeInfo"
16Ch    DWORD   "F3SetHugeInfo"
170h    DWORD   "F3GetFullPathString"
174h    DWORD   "F3GetEffectiveDirectoryRights"
SeeAlso: #02500
--------N-21F27BSF0A-------------------------
INT 21 - Novell NetWare v4+ - GET LOADED NLMs
        AX = F27Bh subfn 0Ah
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02502)
        ES:DI -> reply buffer (see #02503)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled

Format of NetWare "Get NLMs Loaded" request buffer:
Offset  Size    Description     (Table 02502)
 00h    WORD    0005h (length of following data)
 02h    BYTE    0Ah (subfunction "Get NLMs Loaded")
 03h    DWORD   first NLM number to report
SeeAlso: #02503

Format of NetWare "Get NLMs Loaded" reply buffer:
Offset  Size    Description     (Table 02503)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    DWORD   total number of NLMs
 0Ch    DWORD   number of NLM numbers following (max 50)
 10h 50 DWORDs  NLM numbers
SeeAlso: #02502
--------N-21F27BSF0B-------------------------
INT 21 - Novell NetWare v4+ - GET NLM INFORMATION
        AX = F27Bh subfn 0Bh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02504)
        ES:DI -> reply buffer (see #02505)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled

Format of NetWare "Get NLM Information" request buffer:
Offset  Size    Description     (Table 02504)
 00h    WORD    0005h (length of following data)
 02h    BYTE    0Bh (subfunction "Get NLM Information")
 03h    DWORD   NLM number
SeeAlso: #02505

Format of NetWare "Get NLM Information" reply buffer:
Offset  Size    Description     (Table 02505)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    DWORD   identification number
 0Ch    DWORD   flags
 10h    DWORD   NLM type (see #02506)
 14h    DWORD   parent identifier
 18h    DWORD   major version
 1Ch    DWORD   minor version
 20h    DWORD   revision
 24h    DWORD   year
 28h    DWORD   month
 2Ch    DWORD   day
 30h    DWORD   bytes available for allocation
 34h    DWORD   "allocFreeCount"
 38h    DWORD   last garbage collection
 3Ch    DWORD   message language
 40h    DWORD   number of referenced public identifiers
 44h 200 BYTEs  NLM strings: filename, NLM name, copyright
SeeAlso: #02504

(Table 02506)
Values for NetWare NLM type:
 0001h  LAN
 0002h  DSK
 0003h  NAM
 0004h  utility NLM
 0005h  MSL
 0006h  operating system NLM
 0007h  paged NLM
 0008h  HAM
 0009h  CDM
 000Ah  file system NLM
 000Bh  real mode NLM
 000Ch  hidden NLM
SeeAlso: #02505
--------N-21F27BSF0D-------------------------
INT 21 - Novell NetWare v4+ - GET OS VERSION INFORMATION
        AX = F27Bh subfn 0Dh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02507)
        ES:DI -> reply buffer (see #02508)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled

Format of NetWare "Get OS Version Information" request buffer:
Offset  Size    Description     (Table 02507)
 00h    WORD    0001h (length of following data)
 02h    BYTE    0Dh (subfunction "Get OS Version Information")
SeeAlso: #02508

Format of NetWare "Get OS Version Information" reply buffer:
Offset  Size    Description     (Table 02508)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    BYTE    operating system major version
 09h    BYTE    operating system minor version
 0Ah    BYTE    operating system revision number
 0Bh    BYTE    accounting version
 0Ch    BYTE    VAP version
 0Dh    BYTE    queueing version
 0Eh    BYTE    security restrictions level
 0Fh    BYTE    bridging support
 10h    DWORD   maximum number of volumes
 14h    DWORD   number of connection slots
 18h    DWORD   maximum number of logged-in connections
 1Ch    DWORD   maximum number of name spaces
 20h    DWORD   maximum number of LANs
 24h    DWORD   maximum number of media types
 28h    DWORD   maximum number of protocols
 2Ch    DWORD   maximum subdirectory tree depth
 30h    DWORD   maximum number of data streams
 34h    DWORD   maximum number of spooled printers
 38h    DWORD   serial number
 3Ch    WORD    application number
SeeAlso: #02507
--------N-21F27BSF14-------------------------
INT 21 - Novell NetWare v4+ - GET ACTIVE LAN BOARD LIST
        AX = F27Bh subfn 14h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02509)
        ES:DI -> reply buffer (see #02510)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled

Format of NetWare "Get Active LAN Board List" request buffer:
Offset  Size    Description     (Table 02509)
 00h    WORD    0005h (length of following data)
 02h    BYTE    14h (subfunction "Get Active LAN Board List")
 03h    DWORD   start number
SeeAlso: #02510

Format of NetWare "Get Active LAN Board List" reply buffer:
Offset  Size    Description     (Table 02510)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    DWORD   maximum number of LANs
 0Ch    DWORD   number of LAN board numbers returned
 10h 50 DWORDs  board numbers
SeeAlso: #02509
--------N-21F27BSF15-------------------------
INT 21 - Novell NetWare v4+ - GET LAN CONFIGURATION
        AX = F27Bh subfn 15h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02511)
        ES:DI -> reply buffer (see #02512)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F27Bh/SF=16h

Format of NetWare "Get LAN Configuration" request buffer:
Offset  Size    Description     (Table 02511)
 00h    WORD    0005h (length of following data)
 02h    BYTE    15h (subfunction "Get LAN Configuration")
 03h    DWORD   LAN board number
SeeAlso: #02512

Format of NetWare "Get LAN Configuration" reply buffer:
Offset  Size    Description     (Table 02512)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    BYTE    driver configuration major version
 09h    BYTE    driver configuration minor version
 0Ah  6 BYTEs   driver node address
 10h    WORD    driver mode flags
 12h    WORD    driver board number
 14h    WORD    driver board instance
 16h    DWORD   driver maximum size
 1Ah    DWORD   driver maximum receive size
 1Eh    DWORD   driver receive size
 22h  3 DWORDs  reserved
 2Eh    WORD    driver card ID
 30h    WORD    driver transport time
 32h    DWORD   driver source routing
 36h    WORD    driver line speed
 38h    WORD    driver reserved
 3Ah    BYTE    driver major version
 3Bh    BYTE    driver minor version
 3Ch    WORD    driver flags
 3Eh    WORD    driver send retries
 40h    DWORD   driver link
 44h    WORD    driver sharing flags
 46h    WORD    driver slot
 48h  4 WORDs   driver I/O port and lengths
 50h    DWORD   driver memory decode 0
 54h    WORD    driver length 0
 56h    DWORD   driver memory decode 1
 5Ah    WORD    driver length 1
 5Ch  2 BYTEs   driver's interrupts
 5Eh  2 BYTEs   driver's DMA usage
 60h 18 BYTEs   driver's logical name
 72h 14 BYTEs   driver I/O reserved
 80h 128 BYTEs  driver card name
100h 40 BYTEs   driver media type
128h 180 BYTEs  driver custom variables
SeeAlso: #02511
--------N-21F27BSF16-------------------------
INT 21 - Novell NetWare v4+ - GET LAN COMMON COUNTERS
        AX = F27Bh subfn 16h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02513)
        ES:DI -> reply buffer (see #02514)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F27Bh/SF=15h

Format of NetWare "Get LAN Common Counters" request buffer:
Offset  Size    Description     (Table 02513)
 00h    WORD    0009h (length of following data)
 02h    BYTE    16h (subfunction "Get LAN Common Counters")
 03h    DWORD   LAN board number
 07h    DWORD   starting block number (set to 00000000h for first call)
SeeAlso: #02514

Format of NetWare "Get LAN Common Counters" reply buffer:
Offset  Size    Description     (Table 02514)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    BYTE    statistics major version
 09h    BYTE    statistics minor version
 0Ah    DWORD   number of generic counters
 0Eh    DWORD   number of counter blocks
 12h    DWORD   number of custom variables
 16h    DWORD   next counter block number
 1Ah    DWORD   "notSupportedMask"
 1Eh    DWORD   total number of packets tranmitted
 22h    DWORD   total number of packets received
 26h    DWORD   number of times no ECBs were available
 2Ah    DWORD   number of transmitted packets which were too large
 2Eh    DWORD   number of transmitted packets which were too small
 32h    DWORD   number of packet receive overflows
 36h    DWORD   number of received packets which were too large
 3Ah    DWORD   number of received packets which were too small
 3Eh    DWORD   number of miscellaneous transmitted-packet errors
 42h    DWORD   number of miscellaneous received-packet errors
 46h    DWORD   number of times transmission retried
 4Ah    DWORD   number of checksum errors
 4Eh    DWORD   number of hardware receive mismatches
 52h 50 BYTEs   reserved
SeeAlso: #02513
--------N-21F27BSF29-------------------------
INT 21 - Novell NetWare v4+ - GET PROTOCOL STACK BY BOARD
        AX = F27Bh subfn 29h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02515)
        ES:DI -> reply buffer (see #02516)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled

Format of NetWare "Get Protocol Stack by Board" request buffer:
Offset  Size    Description     (Table 02515)
 00h    WORD    0005h (length of following data)
 02h    BYTE    29h (subfunction "Get Protocol Stack by Board")
 03h    DWORD   LAN board number
SeeAlso: #02516

Format of NetWare "Get Protocol Stack by Board" reply buffer:
Offset  Size    Description     (Table 02516)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    WORD    number of stacks listed (max 50)
 0Ah 50 DWORDs  protocol identifiers
SeeAlso: #02515
--------N-21F27BSF33-------------------------
INT 21 - Novell NetWare v4+ - GET ROUTER INFO
        AX = F27Bh subfn 33h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02517)
        ES:DI -> reply buffer (see #02518)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F27Bh/SF=35h

Format of NetWare "Get Router Info" request buffer:
Offset  Size    Description     (Table 02517)
 00h    WORD    0005h (length of following data)
 02h    BYTE    33h (function "Get Router Info")
 03h    DWORD   network number
SeeAlso: #02518

Format of NetWare "Get Router Info" reply buffer:
Offset  Size    Description     (Table 02518)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    DWORD   network number
 0Ch    WORD    hops to net
 0Eh    WORD    network status
 10h    WORD    time to net
SeeAlso: #02517,#02519
--------N-21F27BSF35-------------------------
INT 21 - Novell NetWare v4+ - GET KNOWN NETWORKS INFO
        AX = F27Bh subfn 35h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02519)
        ES:DI -> reply buffer (see #02520)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F27Bh/SF=33h,AX=F27Bh/SF=38h

Format of NetWare "Get Router Info" request buffer:
Offset  Size    Description     (Table 02519)
 00h    WORD    0005h (length of following data)
 02h    BYTE    35h (function "Get Known Networks Info")
 03h    DWORD   start number (00000000h)
SeeAlso: #02520

Format of NetWare "Get Router Info" reply buffer:
Offset  Size    Description     (Table 02520)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    DWORD   number of records following (max 20)
 0Ch    var     array of network info records
                Offset  Size    Description
                 00h    WORD    network number
                 04h    WORD    hops to net
                 06h    WORD    network status
                 08h    WORD    time to net
SeeAlso: #02517,#02519
--------N-21F27BSF38-------------------------
INT 21 - Novell NetWare v4+ - GET KNOWN SERVERS INFO
        AX = F27Bh subfn 38h
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02521)
        ES:DI -> reply buffer (see #02522)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled
SeeAlso: AX=F27Bh/SF=35h

Format of NetWare "Get Known Servers" request buffer:
Offset  Size    Description     (Table 02521)
 00h    WORD    0009h (length of following data)
 02h    BYTE    38h (function "Get Known Servers")
 03h    DWORD   start number
 07h    DWORD   server type
SeeAlso: #02522

Format of NetWare "Get Known Servers" reply buffer:
Offset  Size    Description     (Table 02522)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    DWORD   number of records following (max 20)
 0Ch    var     server record(s)
                Offset  Size    Description
                 00h    DWORD   network number
                 04h  6 BYTEs   node number
                 0Ah    WORD    socket number
                 0Ch    WORD    hops to server
                 0Eh 48 BYTEs   object name
SeeAlso: #02521
--------N-21F27BSF3C-------------------------
INT 21 - Novell NetWare v4+ - GET SERVER SET COMMANDS INFO
        AX = F27Bh subfn 3Ch
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02523)
        ES:DI -> reply buffer (see #02524)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled

Format of NetWare "Get Server Set Commands Info" request packet:
Offset  Size    Description     (Table 02523)
 00h    WORD    0005h (length of following data)
 02h    BYTE    3Ch (subfunction "Get Server Set Commands Info")
 03h    DWORD   start sequence number
SeeAlso: #02524

Format of NetWare "Get Server Set Commands Info" packet:
Offset  Size    Description     (Table 02524)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    DWORD   number of set commands
 0Ch    DWORD   next sequence number
 10h    DWORD   set command type
 14h    DWORD   set command category
 18h    DWORD   set command flags
 1Ch    BYTE    length of set command name
 1Dh  N BYTEs   set command name
        BYTE    number of set command values
      N BYTEs   set command values
SeeAlso: #02523
--------N-21F27BSF3D-------------------------
INT 21 - Novell NetWare v4+ - GET SERVER SET CATEGORIES
        AX = F27Bh subfn 3Dh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see #02525)
        ES:DI -> reply buffer (see #02526)
Return: AL = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
        reply buffer filled

Format of NetWare "Get Server Set Categories" request packet:
Offset  Size    Description     (Table 02525)
 00h    WORD    0005h (length of following data)
 02h    BYTE    3Dh (subfunction "Get Server Set Categories")
 03h    DWORD   start sequence number
SeeAlso: #02526

Format of NetWare "Get Server Set Categories" reply packet:
Offset  Size    Description     (Table 02526)
 00h    DWORD   current server time
 04h    BYTE    vconsole version
 05h    BYTE    vconsole revision
 06h    WORD    reserved
 08h    DWORD   number of set categories
 0Ch    DWORD   next sequence number
 10h    BYTE    length of category name
 11h  N BYTEs   category name
SeeAlso: #02525
--------v-21F2AA-----------------------------
INT 21 - VIRUS - "PcVrsDs" - INSTALLATION CHECK
        AX = F2AAh
Return: AH = AAh if resident
SeeAlso: AH=F1h"VIRUS",AH=F3h"VIRUS"
--------N-21F3-------------------------------
INT 21 - Novell NetWare - FILE SERVICES - FILE SERVER FILE COPY
        AH = F3h
        ES:DI -> request buffer (see #02527)
Return: AL = status/error code
        CX:DX = number of bytes copied
Notes:  this function is supported by Advanced NetWare 2.0+
        both source and destination must be on the same file server
SeeAlso: AH=3Ch,AH=3Fh"DOS"

Format of NetWare "File Server File Copy" request buffer:
Offset  Size    Description     (Table 02527)
 00h    WORD    source file handle (as returned by AH=3Ch or AH=3Dh)
 02h    WORD    destination file handle
 04h    DWORD   starting offset in source
 08h    DWORD   starting offset in destination
 0Ch    DWORD   number of bytes to copy
--------T-21F3-------------------------------
INT 21 - DoubleDOS - ADD CHARACTER TO KEYBOARD BUFFER OF CURRENT JOB
        AH = F3h
        AL = character
Return: AL = 00h successful
             01h buffer full (128 characters)
SeeAlso: AH=E3h"DoubleDOS",AH=F1h"DoubleDOS",AH=F2h"DoubleDOS"
SeeAlso: AH=F8h"DoubleDOS"
--------v-21F3-------------------------------
INT 21 - VIRUS - "Carfield" - INSTALLATION CHECK
        AH = F3h
Return: AX = 0400h if resident
SeeAlso: AH=D5h"Carfield",AX=F2AAh,AH=F7h"VIRUS"
--------T-21F400-----------------------------
INT 21 - DoubleDOS - INSTALLATION CHECK/PROGRAM STATUS
        AX = F400h
Return: AL = program status
            00h if DoubleDOS not present
            01h if running in visible DoubleDOS partition
            02h if running in the invisible DoubleDOS partition
SeeAlso: AX=E400h,AH=F5h"DoubleDOS"
--------T-21F5-------------------------------
INT 21 - DoubleDOS - OTHER PROGRAM STATUS
        AH = F5h
Return: AL = program status
            00h no program in other partition
            01h program in other partition is running
            02h program in other partition is suspended
SeeAlso: AH=E5h"DoubleDOS",AX=F400h"DoubleDOS"
--------v-21F7-------------------------------
INT 21 - VIRUS - "GP1" - INSTALLATION CHECK
        AH = F7h
Return: AX = 0300h if resident
SeeAlso: AH=F0h"VIRUS",AH=F9h"VIRUS"
--------D-21F8-------------------------------
INT 21 - DOS v2.11-2.13 - SET OEM INT 21 HANDLER
        AH = F8h
        DS:DX -> OEM INT 21 handler for functions F9h to FFh
                 FFFFh:FFFFh disables OEM handler
Notes:  this function is known to be supported by Toshiba T1000 ROM MS-DOS
          v2.11, Sanyo MS-DOS v2.11, and TI Professional Computer DOS v2.13
        calls to AH=F9h through AH=FFH will return AL=00h if no handler set
        handler is called with all registers exactly as set by caller, and
          should exit with IRET
SeeAlso: AH=F9h"OEM"
--------T-21F8-------------------------------
INT 21 - DoubleDOS - SET/RESET KEYBOARD CONTROL FLAGS
        AH = F8h
        AL = program for which to set flags
            00h this program
            01h other program
        DX = keyboard control flags (see #02088 at AH=E8h"DoubleDOS")
Return: DX = previous flags
Notes:  disabling Ctrl-PrtSc will allow the program to intercept the keystroke;
          disabling any of the other keystrokes disables them completely
        this function is identical to AH=E8h
SeeAlso: AH=E8h"DoubleDOS",AH=F1h"DoubleDOS",AH=F2h"DoubleDOS"
SeeAlso: AH=F3h"DoubleDOS"
--------D-21F9-------------------------------
INT 21 - DOS v2.11-2.13 - OEM FUNCTION
        AH = F9h
Return: AL = 00h if no OEM function handler installed (see AH=F8h"OEM")
SeeAlso: AH=F8h"OEM",AH=FAh"OEM"
--------T-21F9-------------------------------
INT 21 - DoubleDOS - SET TIMESHARING PRIORITY
        AH = F9h
        AL = priority
            00h visible program gets 70%, invisible gets 30% (default)
            01h visible program gets 50%, invisible gets 50%
            02h visible program gets 30%, invisible gets 70%
            03h Top program gets 70%, bottom program gets 30%
            04h Top program gets 30%, bottom program gets 70%
            05h get current priority
                Return: AL = priority setting
Note:   identical to AH=E9h
SeeAlso: AH=E9h"DoubleDOS",AH=FAh"DoubleDOS",AH=FBh"DoubleDOS"
--------v-21F9-------------------------------
INT 21 - VIRUS - "Satans-Bug" - INSTALLATION CHECK
        AH = F9h
Return: AX = AC0Ah if resident
SeeAlso: AH=F7h"VIRUS",AH=FBh"VIRUS",AX=FEDCh"VIRUS"
--------D-21FA-------------------------------
INT 21 - DOS v2.11-2.13 - OEM FUNCTION
        AH = FAh
Return: AL = 00h if no OEM function handler installed (see AH=F8h"OEM")
SeeAlso: AH=F8h"OEM",AH=F9h"OEM",AH=FBh"OEM"
--------T-21FA-------------------------------
INT 21 - DoubleDOS - TURN OFF TASK SWITCHING
        AH = FAh
Return: task switching turned off
SeeAlso: AH=EAh"DoubleDOS",AH=F9h"DoubleDOS",AH=FBh"DoubleDOS"
SeeAlso: INT FA"DoubleDOS"
--------v-21FA-------------------------------
INT 21 - VIRUS - "Cinderella 2" - INSTALLATION CHECK
        AH = FAh
Return: AH = F9h if resident
SeeAlso: AH=F0h"VIRUS",AX=FBA0h"VIRUS"
--------v-21FA--DX5945-----------------------
INT 21 U - PC Tools v7+ VDEFEND, VSAFE, VWATCH - API
        AH = FAh
        DX = 5945h
        AL = function (00h-02h for VDEFEND, 00h-07h for VSAFE and VWATCH)
Return: varies by function
Note:   this API is identical to the API on INT 13/AH=FAh and INT 16/AH=FAh,
          so it is listed in its entirety only under INT 16/AX=FA00h and
          following
SeeAlso: INT 13/AX=FA00h,INT 16/AX=FA00h
--------k-21FAFF-----------------------------
INT 21 U - IBM PC-DOS - KEYBGK - SELECT KEYBOARD LAYOUT
        AX = FAFFh
        CL = keyboard layout
            31h keyboard 319
            32h keyboard 220
        BX = code page (869 or 813 decimal)
Return: AL = F1h if installed
        DX destroyed
--------D-21FB-------------------------------
INT 21 - DOS v2.11-2.13 - OEM FUNCTION
        AH = FBh
Return: AL = 00h if no OEM function handler installed (see AH=F8h"OEM")
SeeAlso: AH=F8h"OEM",AH=FAh"OEM",AH=FCh"OEM"
--------T-21FB-------------------------------
INT 21 - DoubleDOS - TURN ON TASK SWITCHING
        AH = FBh
Return: task switching turned on
SeeAlso: AH=EBh"DoubleDOS",AH=F9h"DoubleDOS",AH=FAh"DoubleDOS"
SeeAlso: INT FB"DoubleDOS"
--------v-21FB-------------------------------
INT 21 - VIRUS - "Cinderella" - INSTALLATION CHECK
        AH = FBh
Return: AH = 00h if resident
SeeAlso: AH=F9h"VIRUS",AH=FAh"VIRUS",AX=FB0Ah
--------v-21FB0A-----------------------------
INT 21 - VIRUS - "dBASE" - INSTALLATION CHECK
        AX = FB0Ah
Return: AX = 0AFBh if resident
SeeAlso: AH=FBh"VIRUS",AX=FBA0h"VIRUS",AH=FCh"VIRUS"
--------v-21FBA0-----------------------------
INT 21 - VIRUS - "Groove" - INSTALLATION CHECK
        AX = FBA0h
Return: AX = 0ABFh if resident
SeeAlso: AX=FB0Ah"VIRUS",AX=FBFBh"VIRUS"
--------v-21FBFB-----------------------------
INT 21 - VIRUS - "Dir.1367" - INSTALLATION CHECK
        AX = FBFBh
Return: AX = BFBFh if resident
SeeAlso: AX=FBA0h"VIRUS",AH=FCh"VIRUS"
--------D-21FC-------------------------------
INT 21 - DOS v2.11-2.13 - OEM FUNCTION
        AH = FCh
Return: AL = 00h if no OEM function handler installed (see AH=F8h"OEM")
SeeAlso: AH=F8h"OEM",AH=FBh"OEM",AH=FDh"OEM"
--------T-21FC-------------------------------
INT 21 - DoubleDOS - GET VIRTUAL SCREEN ADDRESS
        AH = FCh
Return: ES = segment of virtual screen
Desc:   Determine the address of the virtual screen to which the program
          should write instead of the actual video memory, so that the
          multitasked programs do not interfere with each other's output.
Notes:  screen address can change if task-switching is on!
        identical to AH=ECh
SeeAlso: AH=ECh"DoubleDOS",INT FC"DoubleDOS"
--------v-21FC-------------------------------
INT 21 - VIRUS - "Troi" - INSTALLATION CHECK
        AH = FCh
Return: AL = A5h if resident
SeeAlso: AX=FBA0h"VIRUS",AX=FC03h"VIRUS",AH=FDh"VIRUS"
--------v-21FC03-----------------------------
INT 21 - VIRUS - "Invisible" - INSTALLATION CHECK
        AX = FC03h
Return: AX = 03FCh if resident
SeeAlso: AH=FCh"VIRUS",AH=FDh"VIRUS"
--------D-21FD-------------------------------
INT 21 - DOS v2.11-2.13 - OEM FUNCTION
        AH = FDh
Return: AL = 00h if no OEM function handler installed (see AH=F8h"OEM")
SeeAlso: AH=F8h"OEM",AH=FCh"OEM",AH=FEh"OEM"
--------v-21FD-------------------------------
INT 21 - VIRUS - "Border" - INSTALLATION CHECK
        AH = FDh
Return: AH = 13h if resident
SeeAlso: AH=FCh"VIRUS",AX=FDACh"VIRUS",AH=FEh"VIRUS"
--------s-21FD12BX3457-----------------------
INT 21 - Gravis UltraSound - MegaEm/MEGA_EM - INSTALLATION CHECK
        AX = FD12h
        BX = 3457h
Return: AX = 5678h if installed
        BX = 1235h if v1.x or v2.x installed
            CL = interrupt vector used by MegaEm (default 81h)
        BX = 1237h if v3.x installed
            CL = interrupt vector used by MegaEm (default 81h)
            DX = version number
Program: MegaEm is a protected-mode SoundBlaster, SoundCanvas, and MT-32
          emulator for the Gravis UltraSound
SeeAlso: INT 2F/AX=CD00h/BX=464Fh,INT 7E/AX=00FEh"SBOS",INT 81/AX=0200h
--------v-21FDAC-----------------------------
INT 21 - VIRUS - "Delwin" - INSTALLATION CHECK
        AX = FDACh
Return: AX = 02E3h if resident
SeeAlso: AH=FDh"VIRUS",AH=FEh"VIRUS"
--------D-21FE-------------------------------
INT 21 - DOS v2.11-2.13 - OEM FUNCTION
        AH = FEh
Return: AL = 00h if no OEM function handler installed (see AH=F8h"OEM")
SeeAlso: AH=F8h"OEM",AH=FDh"OEM",AH=FFh"OEM"
--------T-21FE-------------------------------
INT 21 - DoubleDOS - GIVE AWAY TIME TO OTHER TASKS
        AH = FEh
        AL = number of 55ms time slices to give away
Return: returns after giving away time slices
SeeAlso: AH=EEh"DoubleDOS",INT FE"DoubleDOS"
--------v-21FE-------------------------------
INT 21 - VIRUS - "483" - INSTALLATION CHECK
        AH = FEh
Return: AH = 00h if resident
SeeAlso: AX=FDACh"VIRUS",AX=FE01h
--------v-21FE01-----------------------------
INT 21 - VIRUS - "Flip" - INSTALLATION CHECK
        AX = FE01h
Return: AX = 01FEh if resident
SeeAlso: AH=FEh"VIRUS",AX=FE02h
--------v-21FE02-----------------------------
INT 21 - VIRUS - "2468"/"Tequila" - INSTALLATION CHECK
        AX = FE02h
Return: AX = 01FDh if resident
SeeAlso: AX=FE01h,AX=FE03h,AX=FEDCh"VIRUS"
--------v-21FE03-----------------------------
INT 21 - VIRUS - "2468"/"Tequila" - DISPLAY VIRUS MESSAGE
        AX = FE03h
SeeAlso: AX=FE02h,AX=FEADh
--------v-21FEAD------------------------
INT 21 - VIRUS - "Shifting Objective" - INSTALLATION CHECK
        AX = FEADh
Return: AX = D00Dh if resident
SeeAlso: AX=FE03h,AX=FEDCh"VIRUS"
--------d-21FEDC-----------------------------
INT 21 - PCMag PCMANAGE/DCOMPRES - INSTALLATION CHECK
        AX = FEDCh
Return: AX = CDEFh if installed
Program: the PCMANAGE/DCOMPRES combination from PC Magazine permits
          infrequently-used files to be compressed to save space and
          transparently expanded when accessed
SeeAlso: AH=DCh,INT 2D/AL=10h"dLite"
--------v-21FEDC-----------------------------
INT 21 - VIRUS - "Black Monday" - INSTALLATION CHECK
        AX = FEDCh
Return: AL = DCh if resident
SeeAlso: AX=FE02h,AX=FEFEh
--------v-21FEFE-----------------------------
INT 21 - VIRUS - "CIDER" - INSTALLATION CHECK
        AX = FEFEh
Return: SI = 1994h if resident
SeeAlso: AX=FEDCh"VIRUS",AH=FFh"VIRUS"
--------D-21FF-------------------------------
INT 21 - DOS v2.11-2.13 - OEM FUNCTION
        AH = FFh
Return: AL = 00h if no OEM function handler installed (see AH=F8h"OEM")
SeeAlso: AH=F8h"OEM",AH=FEh"OEM"
--------K-21FF-------------------------------
INT 21 - CED (Command EDitor) - INSTALLABLE COMMANDS
        AH = FFh
        AL = subfunction
            00h add installable command
                BL = mode
                    bit 0 = 1 callable from DOS prompt
                    bit 1 = 1 callable from application
                DS:SI -> CR-terminated command name
                ES:DI -> FAR routine entry point
            01h remove installable command
                DS:SI -> CR-terminated command name
            02h reserved, may be used to test for CED installation
Return: CF clear if successful
        CF set on error
            AX = error code
                01h invalid function
                02h command not found (subfunction 01h only)
                08h insufficient memory (subfunction 00h only)
                0Eh bad data (subfunction 00h only)
        AH = FFh if CED not installed
Program: CED is a shareware DOS command-line enhancer by Christopher J. Dunford
SeeAlso: AX=0A00h
--------E-21FF-------------------------------
INT 21 - DJ GO32.EXE 80386+ DOS extender - DOS EXTENSIONS
        AH = FFh
        AL = function
            01h create file
            02h open file
            03h get file statistics
            04h get time of day
            05h set time of day
            06h stat
            07h system
Program: GO32.EXE is a DOS extender included as part of the 80386 port of the
          GNU C/C++ compiler by DJ Delorie and distributed as DJGPP
SeeAlso: INT 10/AH=FFh"GO32"
--------K-21FF-------------------------------
INT 21 - DOSED.COM - INSTALLATION CHECK
        AH = FFh
        DS:SI -> "DOSED"
        ES = 0000h
Return: ES:DI -> "DOSED" if installed
Program: DOSED is a free DOS commandline editor/history buffer by Sverre H.
          Huseby
--------v-21FF-------------------------------
INT 21 - VIRUS - "Sunday", "Tumen 0.5", "Hero" - INSTALLATION CHECK
        AH = FFh
Return: AH = 00h if "Tumen 0.5" or "Hero" resident
        AX = 0400h if "Sunday" resident
SeeAlso: AX=FEDCh"VIRUS",AX=FF01h"VIRUS"
--------E-21FF-------------------------------
INT 21 UP - Rational Systems DOS/4GW - API
        AH = FFh
        DH = function (00h-17h) (also see separate entries below)
        DL = subfunction or argument
Return: CF clear if valid function number
            AX = status???
        CF set if invalid function
SeeAlso: INT 15/AX=BFDCh
--------E-21FF--DH00-------------------------
INT 21 UP - Rational Systems DOS/4GW - GET VERSION???
        AH = FFh
        DH = 00h
        DL = ??? (78h seen)
Return: CF clear
        EAX = 4734FFFFh (high word is byte-swapped "4G") if DOS/4G installed
Note:   Quarterdeck's DESQview/X X Toolkit library uses this call to determine
          whether the direct-mapped linear 4GB segment's selector is 34h or 38h
SeeAlso: INT 21/AH=FFh/DH=00h"DOS/4GW"
--------E-21FF--DH02-------------------------
INT 21 UP - Rational Systems DOS/4GW - SET ???
        AH = FFh
        DH = 02h
        DL = ???
Return: CF clear
--------E-21FF--DH05-------------------------
INT 21 UP - Rational Systems DOS/4GW - ???
        AH = FFh
        DH = 05h
        BX = ???
Return: ???
--------E-21FF--DH06-------------------------
INT 21 UP - Rational Systems DOS/4GW - ???
        AH = FFh
        DH = 06h
        BX = ???
Return: ???
--------E-21FF--DH07-------------------------
INT 21 UP - Rational Systems DOS/4GW - ???
        AH = FFh
        DH = 07h
        BX = ???
Return: ???
--------E-21FF--DH08-------------------------
INT 21 UP - Rational Systems DOS/4GW - ???
        AH = FFh
        DH = 08h
        BX = ???
        CX = ???
        ES = ???
Return: ???
--------E-21FF--DH09-------------------------
INT 21 UP - Rational Systems DOS/4GW - GET ???
        AH = FFh
        DH = 09h
Return: ES:BX -> ???
--------E-21FF--DH0A-------------------------
INT 21 UP - Rational Systems DOS/4GW - ???
        AH = FFh
        DH = 0Ah
        AL = ???
        BX = ???
        CX = ???
Return: ES = ??? or 0000h
--------E-21FF--DH0B-------------------------
INT 21 UP - Rational Systems DOS/4GW - ???
        AH = FFh
        DH = 0Bh
        AL = ???
        BX = ???
        CX = ???
Return: ???
--------E-21FF--DH0C-------------------------
INT 21 UP - Rational Systems DOS/4GW - GET/SET ???
        AH = FFh
        DH = 0Ch
        DL = ??? (00h or 01h)
Return: CF clear if successful
            AL = previous value of ???
        CF set on error (DL out of range)
            AX = FFFFh
--------E-21FF--DH0D-------------------------
INT 21 UP - Rational Systems DOS/4GW - ???
        AH = FFh
        DH = 0Dh
        ???
Return: ???
--------E-21FF--DH0E-------------------------
INT 21 UP - Rational Systems DOS/4GW - ???
        AH = FFh
        DH = 0Eh
Return: DX:AX -> XBRK structure (see #00508 at INT 15/AX=BF02h)
        BX = ???
        CX = ???
SeeAlso: INT 15/AX=BF02h
--------E-21FF--DH0F-------------------------
INT 21 UP - Rational Systems DOS/4GW - ???
        AH = FFh
        DH = 0Fh
        ???
Return: ???
--------E-21FF--DH10-------------------------
INT 21 UP - Rational Systems DOS/4GW - ???
        AH = FFh
        DH = 10h
        AL = ???
        BX = ???
        CX = ???
        DI = ???
        SI = ???
Return: ???
Note:   among other things, frees two memory blocks via INT 21/AH=49h
--------E-21FF--DH11-------------------------
INT 21 UP - Rational Systems DOS/4GW - NOP
        AH = FFh
        DH = 11h
--------E-21FF--DH12-------------------------
INT 21 UP - Rational Systems DOS/4GW - EXCHANGE ??? POINTERS
        AH = FFh
        DH = 12h
        DS:SI -> new ???
        ES:DI -> new ???
Return: DS:SI -> previous ???
        ES:DI -> previous ???
--------E-21FF--DH13-------------------------
INT 21 UP - Rational Systems DOS/4GW - ???
        AH = FFh
        DH = 13h
        AL = ???
        ES = ???
Return: ???
--------E-21FF--DH14-------------------------
INT 21 UP - Rational Systems DOS/4GW - ???
        AH = FFh
        DH = 14h
        BX = ???
        CX = ???
Return: CF clear
            AX = ???
            DX = ???
--------E-21FF--DH15-------------------------
INT 21 UP - Rational Systems DOS/4GW - GET ??? FUNCTIONS
        AH = FFh
        DH = 15h
Return: CF clear
            DX:AX -> FAR function for ???
            CX:BX -> FAR function for ???
            SI:DI -> FAR function for ???
--------E-21FF--DH16-------------------------
INT 21 UP - Rational Systems DOS/4GW - GET ???
        AH = FFh
        DH = 16h
Return: AX = ???
--------E-21FF--DH17-------------------------
INT 21 UP - Rational Systems DOS/4GW - ???
        AH = FFh
        DH = 17h
        AL = ???
        DL = ???
Return: ???
--------N-21FF00-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET SYSTEM INFORMATION
        AX = FF00h
        CL = what to get
            00h user information (see #02528)
            01h drive mapping (see #02529)
            02h printer server(s)
            05h local DOS drive number
Return: ES:BX -> desired information
Program: TopWare Network Operating System is manufactured by Grand Computer
          Company
Note:   this call is only supported on Workstations, not on the server
SeeAlso: AX=FF04h,INT 2F/AX=FF00h

Format of TopWare user information:
Offset  Size    Description     (Table 02528)
 00h    BYTE    node ID
 01h 15 BYTEs   user name
 10h    WORD    user number
 12h    BYTE    group number

Format of TopWare drive mapping [array]:
Offset  Size    Description     (Table 02529)
 00h    BYTE    bits 6-0: drive number (1=A:, etc.)
                bit 7: this is a server drive
 01h  3 BYTEs   mapping drive (for example, "C:\")
 04h 64 BYTEs   current directory
--------E-21FF00DX0078-----------------------
INT 21 - Rational Systems DOS/4G - INSTALLATION CHECK
        AX = FF00h
        DX = 0078h
Return: AL <> 00h if installed
            GS = segment of kernel if nonzero
SeeAlso: INT 15/AX=BF02h
--------v-21FF01-----------------------------
INT 21 - VIRUS - "Drop" - INSTALLATION CHECK
        AX = FF01h
Return: AX = 01FFh if resident
SeeAlso: AH=FEh"VIRUS",AX=FF0Fh"FLU_SHOT"
--------N-21FF04-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET/SET DEFAULT FILE PROTECTION ATTRIBS
        AX = FF04h
        CL = function
            00h get protections
                Return: BH = read attribute
                        BL = write attribute
            01h set protections
                BH = read attribute
                BL = write attribute
Note:   this function is supported only on Workstations, not on the server
SeeAlso: AX=FF00h"TopWare"
--------v-21FF0F-----------------------------
INT 21 - FLU_SHOT+ v1.83 - INSTALLATION CHECK
        AX = FF0Fh
Return: AX = 0101h if resident
Program: FLU_SHOT+ is an antivirus/antitrojan program by Ross M. Greenberg and
          Software Concepts Design
Note:   the "PSQR/1720" virus calls this function to determine whether
          FLU_SHOT+ is present
SeeAlso: AH=FFh"VIRUS",AX=FF10h"VIRUS"
--------v-21FF10-----------------------------
INT 21 - VIRUS - "Twins" - INSTALLATION CHECK
        AX = FF10h
Return: AL = 07h if resident
SeeAlso: AX=FF0Fh,AX=FFFEh
--------N-21FF80DHFF-------------------------
INT 21 - TopWare Network OS v5.10+ - SEND MESSAGE
        AX = FF80h
        DH = FFh
        DL = destination address (FFh for broadcast)
        CX = message length (max 2000)
        DS:SI -> message to be sent (see #02530)
Return: nothing
Program: TopWare Network Operating System is manufactured by Grand Computer
          Company
Notes:  this function is supported on both Workstations and the server
        there is no guarantee that the message will be received correctly, or
          at all, by the destination

Format of TopWare message:
Offset  Size    Description     (Table 02530)
 00h    BYTE    type code
                07h TopSend
                11h user application
                other reserved for TopWare
 01h    var     data
Note:   sending messages with a type code other than 11h will cause
          unpredictable results
--------N-21FF82-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET STATION ADDRESS
        AX = FF82h
Return: AL = station address
Note:   this function is supported on both Workstations and the server
SeeAlso: AX=FF91h
--------N-21FF8C-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET STATUS OF TopShow/Emulated FUNCTION
        AX = FF8Ch
        BL = subfunction
            00h get TopShow status
            FFh get Emulated status
Return: AL = status
            00h not installed
            01h already installed
--------N-21FF8D-----------------------------
INT 21 - TopWare Network OS v5.10+ - CALL TopShow FUNCTION
        AX = FF8Dh
        CH = monochrome flag (01h monochrome, 00h not monochrome)
        CL = screen mode of station to be viewed (see #02531)
        BL = graphic page number for monochrome
Return: AL = status (00h successful, else failed)
SeeAlso: AX=FF8Eh,AX=FFCFh

(Table 02531)
Values for TopWare screen mode:
 00h    text mode
 01h    720x348
 02h    640x408
 03h    720x352
 04h    640x390
 05h    reserved
--------N-21FF8E-----------------------------
INT 21 - TopWare Network OS v5.10+ - CANCEL TopShow FUNCTION
        AX = FF8Eh
Return: AL = 00h (successful, TopShow removed)
SeeAlso: AX=FF8Dh
--------N-21FF91-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET FILE SERVER STATION NUMBER
        AX = FF91h
Return: AL = station number of file server
SeeAlso: AX=FF82h
--------N-21FF97-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET MAXIMUM STATION NUMBER (server only)
        AX = FF97h
Return: AL = maximum station number
SeeAlso: AX=FF98h
--------N-21FF98-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET MAXIMUM FILE NUMBER (server only)
        AX = FF98h
Return: AL = maximum file
SeeAlso: AX=FF97h
--------N-21FF9A-----------------------------
INT 21 - TopWare Network OS v5.10+ - RECEIVE OF USER-DEFINED PACKETS
        AX = FF9Ah
        ES:BX -> buffer for user-defined packet (see #02532)
Return: nothing

Format of TopWare user-defined packet:
Offset  Size    Description     (Table 02532)
 00h    BYTE    FFh
 01h    WORD    (call) length of data field plus 3
                (ret) length of received message (0000h if none received)
 03h    BYTE    destination ID (FFh for broadcast message)
 04h    BYTE    sending station ID
 05h    BYTE    type code (11h; all other codes reserved for TopWare)
 06h  N BYTEs   received message
--------N-21FF9F-----------------------------
INT 21 - TopWare Network OS v5.10+ - ENABLE/DISABLE TopTerm SERVICE
        AX = FF9Fh
        CL = new state (00h disable [disregard TopTerm packets], 01h enable)
Return: AL = status (00h successful, FFh failed)
Note:   this function is only supported by Workstations, not the server
--------N-21FFB0-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET SPOOLER PRINTING PRIORITY
        AX = FFB0h
Return: AL = priority status (see #02533)
SeeAlso: AX=FFB1h

Bitfields for TopWare printer priority status:
Bit(s)  Description     (Table 02533)
 2      LPT3 has high priority
 1      LPT2 has high priority
 0      LPT1 has high priority
--------N-21FFB1-----------------------------
INT 21 - TopWare Network OS v5.10+ - SET SPOOLER PRINTING PRIORITY
        AX = FFB1h
        CH = printer number (00h LPT1, 01h LPT2, 02h LPT3)
        CH = new priority (00h normal, 01h high)
Return: nothing
SeeAlso: AX=FFB0h
--------N-21FFB3-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET DEFAULT START-OF-JOB FORMFEED STATUS
        AX = FFB3h
Return: AL = starting formfeed status (see #02534)
SeeAlso: AX=FFB4h,AX=FFC0h

Bitfields for TopWare printer start-of-job formfeed status:
Bit(s)  Description     (Table 02534)
 2      LPT3 has formfeed enabled
 1      LPT2 has formfeed enabled
 0      LPT1 has formfeed enabled
--------N-21FFB4-----------------------------
INT 21 - TopWare Network OS v5.10+ - SET DEFAULT START-OF-JOB FORMFEED STATUS
        AX = FFB4h
        CH = printer number (00h LPT1, 01h LPT2, 02h LPT3)
        CH = new formfeed status (00h off, 01h on)
Return: nothing
SeeAlso: AX=FFB3h,AX=FFC1h
--------N-21FFBB-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET PRINTER SERVER STATION ADDRESS
        AX = FFBBh
        CH = printer number (00h LPT1, 01h LPT2, 02h LPT3)
Return: AL = current mapping printer server station number
            00h if local
SeeAlso: AX=FFBCh
--------N-21FFBC-----------------------------
INT 21 - TopWare Network OS v5.10+ - CANCEL TopShow FUNCTION
        AX = FFBCh
        CH = printer number (00h LPT1, 01h LPT2, 02h LPT3)
        CL = printer server station address or 00h for local printer
Return: AL = status (00h successful, else failed)
SeeAlso: AX=FFBBh
--------N-21FFBD-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET CURRENT AUTOPRINT TIME
        AX = FFBDh
        CH = printer number (00h LPT1, 01h LPT2, 02h LPT3)
Return: AX = current AutoPrint timeout in clock ticks
SeeAlso: AX=FFBEh
--------N-21FFBE-----------------------------
INT 21 - TopWare Network OS v5.10+ - SET AUTOPRINT TIME
        AX = FFBEh
        CH = printer number (00h LPT1, 01h LPT2, 02h LPT3)
        BX = timeout in clock ticks
SeeAlso: AX=FFBDh
--------N-21FFBF-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET LOGON USER INFORMATION
        AX = FFBFh
        DX:BX -> buffer for logon information (see #02535)
Return: AL = status (00h successful, else failed)
        AH = number of logged-in stations

Format of TopWare logon information:
Offset  Size    Description     (Table 02535)
 00h    BYTE    station address
 01h 15 BYTEs   username
--------N-21FFC0-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET DEFAULT END-OF-JOB FORMFEED STATUS
        AX = FFC0h
Return: AL = ending formfeed status (see #02536)
SeeAlso: AX=FFB3h,AX=FFC1h

Bitfields for TopWare printer end-of-job formfeed status:
Bit(s)  Description     (Table 02536)
 2      LPT3 has formfeed enabled
 1      LPT2 has formfeed enabled
 0      LPT1 has formfeed enabled
--------N-21FFC1-----------------------------
INT 21 - TopWare Network OS v5.10+ - SET DEFAULT END-OF-JOB FORMFEED STATUS
        AX = FFC1h
        CH = printer number (00h LPT1, 01h LPT2, 02h LPT3)
        CH = new formfeed status (00h off, 01h on)
Return: nothing
SeeAlso: AX=FFB4h,AX=FFC0h
--------N-21FFC2-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET DEFAULT COPIES OF SPOOLING FILE
        AX = FFC2h
        CH = printer number (00h LPT1, 01h LPT2, 02h LPT3)
Return: AL = default number of copies printed
SeeAlso: AX=FFC7h
--------N-21FFC3-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET SHARING STATUS OF PRINTER SERVER
        AX = FFC3h
Return: AL = sharing status of printers (see #02537)
            FFh if not a printer server

Bitfields for TopWare printer sharing status:
Bit(s)  Description     (Table 02537)
 2      LPT3 is shared
 1      LPT2 is shared
 0      LPT1 is shared
--------N-21FFC4-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET/SET LPT PORT ON PRINT SERVER
        AX = FFC4h
        BL = subfunction
            00h get
                Return: AL = mapped printer port on print server
            01h set
                CL = network printer port (00h LPT1, 01h LPT2, 02h LPT3)
        CH = local printer (00h LPT1, 01h LPT2, 02h LPT3)
--------N-21FFC6-----------------------------
INT 21 - TopWare Network OS v5.10+ - SET DEFAULT PRINT FILE HEADER
        AX = FFC6h
        CH = printer number (00h LPT1, 01h LPT2, 02h LPT3)
        CL = header state (00h off, 01h on)
SeeAlso: AX=FFC8h
--------N-21FFC7-----------------------------
INT 21 - TopWare Network OS v5.10+ - SET DEFAULT PRINT COPIES
        AX = FFC7h
        CH = printer number (00h LPT1, 01h LPT2, 02h LPT3)
        CL = new default number of copies to print
SeeAlso: AX=FFC2h
--------N-21FFC8-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET DEFAULT PRINT FILE HEADER STATUS
        AX = FFC8h
Return: AL = header status for printers (see #02538)
SeeAlso: AX=FFC6h

Bitfields for TopWare print header status:
Bit(s)  Description     (Table 02538)
 2      LPT3 has headers enabled
 1      LPT2 has headers enabled
 0      LPT1 has headers enabled
--------N-21FFC9-----------------------------
INT 21 - TopWare Network OS v5.10+ - SET PRINTER SHARING
        AX = FFC9h
        CH = printer number (00h LPT1, 01h LPT2, 02h LPT3)
        CL = new sharing state (00h off, 01h on)
Return: AL = status (00h successful, FFh not printer server)
--------N-21FFCA-----------------------------
INT 21 - TopWare Network OS v5.10+ - MOVE FILE FROM ONE PRINT SERVER TO ANOTHER
        AX = FFCAh
        CH = printer number (00h LPT1, 01h LPT2, 02h LPT3)
        CL = original printer server station address
        BL = target printer server station address
        DS:DX -> filename (12 bytes)
Return: AL = status (00h successful, else failed)
SeeAlso: AX=FFCBh
--------N-21FFCB-----------------------------
INT 21 - TopWare Network OS v5.10+ - DELETE FILE FROM SPOOLING QUEUE
        AX = FFCBh
        CH = printer number (00h LPT1, 01h LPT2, 02h LPT3)
        CL = printer server station address
        DS:DX -> filename (12 bytes)
Return: AL = status (00h successful, else failed)
SeeAlso: AX=FFCAh
--------N-21FFCC-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET PRINT SERVER'S SPOOLING QUEUE STATUS
        AX = FFCCh
        CL = printer server station address
        BH = start item number of spooling file for print server
        BL = number of the item to be retrieved
        DS:DX -> buffer for queued file information (see #02539)
Return: AL = status
            00h successful
                AH = number of spool files
                DS:DX buffer filled
            nonzero failed

Format of TopWare queued file information buffer [16-item array, one element]:
Offset  Size    Description     (Table 02539)
 00h 12 BYTEs   filename
 0Ch    DWORD   size
 10h    WORD    date
 12h    WORD    time
 14h 15 BYTEs   username
 23h    BYTE    count
 24h    BYTE    flag: header
 25h    BYTE    print number
--------N-21FFCD-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET STATUS OF ALL PRINT SERVERS
        AX = FFCDh
        DS:DX -> buffer for server status (see #02540)
Return: AL = status
            00h successful
                AH = number of print servers
            nonzero failed

Format of TopWare server status:
Offset  Size    Description     (Table 02540)
 00h    BYTE    station address
 01h 15 BYTEs   username
 10h    BYTE    flag: 01h printer is shared, 00h sharing disabled
 11h    BYTE    number of files pending in queue
--------N-21FFCF-----------------------------
INT 21 - TopWare Network OS v5.10+ - CALL TopLook FUNCTION
        AX = FFCFh
        DH = page number (0-2, 2 is text mode)
        DL = type
            00h look at specific screen
            01h AutoLook on
            FFh AutoLook off
        BH = station number wishing to look
        BL = station number to be looked at
        CH = monochrome flag (01h monochrome, 00h not monochrome)
        CL = screen mode (see #02531)
Return: AL = status (00h successful, nonzero failed)
SeeAlso: AX=FF8Dh
--------N-21FFD6-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET KEYCARD SERIAL NUMBER AND MAX USERS
        AX = FFD6h
        ES:BX -> 12-byte buffer for keycard serial number
Return: CX = maximum number of users
        ES:BX buffer filled
--------N-21FFD7-----------------------------
INT 21 - TopWare Network OS v5.10+ - GET NETWORK PROTECTION ATTRIBUTES STATUS
        AX = FFD7h
Return: AL = status (00h disabled, 01h enabled)
--------N-21FFE3DL00-------------------------
INT 21 - TopWare Network OS v5.10+ - INITIATE ACCESS TO SPECIFIC PACKET TYPE
        AX = FFE3h
        DL = 00h
        BX = packet type for Ethernet header (IP = 0800h, ARP = 0806h, etc.)
        ES:DI -> receive routine (see #02542)
Return: CF clear if successful
            AX = handle number
        CF set on error
            DH = error code (03h,05h,09h,0Ah,11h) (see #02541)
SeeAlso: AX=FFE3h/DL=01h

(Table 02541)
Values for TopWare error code:
 01h    invalid handle
 03h    no interfaces of the specified type found
 05h    bad packet type
 09h    insufficient space
 0Ah    type already being accessed
 0Ch    unable to send packet (usually hardware error)
 11h    invalid function

(Table 02542)
Values TopWare receive routine is called with:
        AX = function
            0000h request packet buffer
                CX = packet size
                Return: ES:DI -> buffer or 0000h:0000h to discard packet
            0001h packet copied
                CX = packet size
                DS:SI -> copied packet (same as returned ES:DI above)
--------N-21FFE3DL01-------------------------
INT 21 - TopWare Network OS v5.10+ - END ACCESS TO SPECIFIC PACKET TYPE
        AX = FFE3h
        DL = 01h
        BX = handle returned by AX=FFE3h/DL=00h
Return: CF clear if successful
        CF set on error
            DH = error code (01h,11h) (see #02541)
Note:   the specified access handle will no longer be valid after this call
SeeAlso: AX=FFE3h/DL=00h
--------N-21FFE3DL02-------------------------
INT 21 - TopWare Network OS v5.10+ - SEND PACKET
        AX = FFE3h
        DL = 02h
        CX = length of data buffer
        DS:SI -> buffer containing data
Return: CF clear if successful
        CF set on error
            DH = error code (0Ch,11h) (see #02541)
--------N-21FFE3DL03-------------------------
INT 21 - TopWare Network OS v5.10+ - GET LOCAL NETWORK INTERFACE ADDRESS
        AX = FFE3h
        DL = 03h
        ES:DI -> 6-byte buffer for address
SeeAlso: AX=FFE3h/DL=00h
--------v-21FFFE-----------------------------
INT 21 - VIRUS - "08/15"/"Many Fingers" - INSTALLATION CHECK
        AX = FFFEh
Return: AX = 0815h if resident
SeeAlso: AX=FF10h,AX=FFFEh/BX=0000h
--------v-21FFFEBX0000-----------------------
INT 21 - VIRUS - "Anti-Thunderbyte/LEMMING" - INSTALLATION CHECK
        AX = FFFEh
        BX = 0000h
Return: BX = FFFFh if resident
SeeAlso: AX=FFFEh,AX=FFFFh
--------v-21FFFF-----------------------------
INT 21 - VIRUS - "Ontario", "Year 1992"/"B1M92" - INSTALLATION CHECK
        AX = FFFFh
Return: AX = 0000h if "Ontario" resident
        AX = 1992h if "Year 1992"/"B1M92" resident
SeeAlso: AX=FF0Fh,AX=FFFFh/CX=0000h,INT 6B"VIRUS"
--------v-21FFFFCX0000-----------------------
INT 21 - VIRUS - "Revenge" - INSTALLATION CHECK
        AX = FFFFh
        CX = 0000h
Return: CX = 0006h if resident
SeeAlso: AX=FFFFh,INT 6B"VIRUS"
--------D-22---------------------------------
INT 22 - DOS 1+ - PROGRAM TERMINATION ADDRESS
Desc:   this vector specifies the address of the routine which is to be given
          control after a program is terminated; it should never be called
          directly, since it does not point at an interrupt handler
Notes:  this vector is restored from the DWORD at offset 0Ah in the PSP during
          termination, and then a FAR JMP is performed to the address in INT 22
        normally points at the instruction immediately following INT 21/AH=4Bh
          call which loaded the current program
SeeAlso: INT 20,INT 21/AH=00h,INT 21/AH=31h,INT 21/AH=4Ch
--------G-22---------------------------------
INT 22 - COMTROL HOSTESS i/ISA DEBUGGER - CHANGE FIRMWARE DEBUGGING PORT
        AL = new firmware debugging port
Return: ???
SeeAlso: INT 21"COMTROL",INT 23"COMTROL"
--------D-23---------------------------------
INT 23 - DOS 1+ - CONTROL-C/CONTROL-BREAK HANDLER
---DOS 1.x---
Return: AH = 00h abort program
        if all registers preserved, restart DOS call
---DOS 2+---
        CF clear
Return: all registers preserved
        return via RETF with CF set or (MS-DOS 1,DR DOS) RETF 2 with CF set
            DOS will abort program with errorlevel 0
        else (RETF/RETF 2 with CF clear or IRET with CF ignored)
            interrupted DOS call is restarted
Notes:  this interrupt is invoked whenever DOS detects a ^C or ^Break; it
          should never be called directly
        MS-DOS 1.25 also invokes INT 23 on a divide overflow (INT 00)
        MS-DOS remembers the stack pointer before calling INT 23, and if it is
          not the same on return, pops and discards the top word; this is what
          permits a return with RETF as well as IRET or RETF 2
        MS-DOS 2.1+ ignores the returned CF if SP is the same on return as it
          was when DOS called INT 23, so RETF 2 will not terminate the program
        Novell DOS 7 always pops a word if CF is set on return, so one should
          not return with RETF 2 and CF set or IRET with the stored flags' CF
          set
        any DOS call may safely be made within the INT 23 handler, although
          the handler must check for a recursive invocation if it does
          call DOS
SeeAlso: INT 1B
--------G-23---------------------------------
INT 23 - COMTROL HOSTESS i/ISA DEBUGGER - GET CONFIGURATION INFORMATION
        AL = query type
            00h get old config map
                Return: AX = old config map
            01h get dual-ported RAM map
                Return: BX:AX = dual-ported RAM map
            02h get SCC port map
                Return: BX:AX = SCC port map
SeeAlso: INT 22"COMTROL",INT 26"COMTROL"
--------D-24---------------------------------
INT 24 C - DOS 1+ - CRITICAL ERROR HANDLER
Notes:  invoked when a critical (usually hardware) error is encountered by DOS
          (see #02543); should never be called directly
        when DOS terminates a program, it copies the previous value of the
          INT 24 vector out of the PSP (see #01378) and into the interrupt
          vector table
SeeAlso: INT 21/AH=95h

(Table 02543)
Values critical error handler is called with:
        AH = type and processing flags (see #02544)
        AL = drive number if AH bit 7 clear
        BP:SI -> device driver header (see #01646 at INT 21/AH=52h)
                (BP:[SI+4] bit 15 set if character device)
        DI low byte contains error code if AH bit 7 set (see #02545)
        STACK:  DWORD   return address for INT 24 call
                WORD    flags pushed by INT 24
                WORD    original AX on entry to INT 21
                WORD    BX
                WORD    CX
                WORD    DX
                WORD    SI
                WORD    DI
                WORD    BP
                WORD    DS
                WORD    ES
                DWORD   return address for INT 21 call
                WORD    flags pushed by INT 21
Return: AL = action code (see #02546)
        SS,SP,DS,ES,BX,CX,DX preserved
Notes:  the only DOS calls the handler may make are INT 21/AH=01h-0Ch,30h,59h
        if the handler returns to the application by popping the stack, DOS
          will be in an unstable state until the first call with AH > 0Ch
        for DOS 3.1+, IGNORE (AL=00h) is turned into FAIL (AL=03h) on network
          critical errors
        if IGNORE specified but not allowed, it is turned into FAIL
        if RETRY specified but not allowed, it is turned into FAIL
        if FAIL specified but not allowed, it is turned into ABORT
        (DOS 3.0+) if a critical error occurs inside the critical error
          handler, the DOS call is automatically failed (AL set to 03h and
          the INT 24 call skipped)

Bitfields for critical error type and processing flags:
Bit(s)  Description     (Table 02544)
 7      clear = disk I/O error
        set   = -- if block device, bad FAT image in memory
                -- if char device, error code in DI
 6      unused
 5      Ignore allowed (DOS 3.0+)
 4      Retry allowed (DOS 3.0+)
 3      Fail allowed (DOS 3.0+)
 2-1    disk area of error
        00 = DOS area   01 = FAT
        10 = root dir   11 = data area
 0      set if write, clear if read
SeeAlso: #02545,#02546

(Table 02545)
Values for critical error code:
 00h    write-protection violation attempted
 01h    unknown unit for driver
 02h    drive not ready
 03h    unknown command given to driver
 04h    data error (bad CRC)
 05h    bad device driver request structure length
 06h    seek error
 07h    unknown media type
 08h    sector not found
 09h    printer out of paper
 0Ah    write fault
 0Bh    read fault
 0Ch    general failure
 0Dh    (DOS 3.0+) sharing violation
 0Eh    (DOS 3.0+) lock violation
 0Fh    invalid disk change
 10h    (DOS 3.0+) FCB unavailable
 11h    (DOS 3.0+) sharing buffer overflow
 12h    (DOS 4.0+) code page mismatch
 13h    (DOS 4.0+) out of input
 14h    (DOS 4.0+) insufficient disk space
SeeAlso: #02544,#02546

(Table 02546)
Values for critical error handler action code:
 00h    ignore error and continue processing request
 01h    retry operation
 02h    terminate program as though INT 21/AH=4Ch called (INT 20h for DOS 1.x)
 03h    fail system call in progress (DOS 3+)
SeeAlso: #02544,#02546
--------D-25---------------------------------
INT 25 - DOS 1+ - ABSOLUTE DISK READ (except partitions > 32M)
        AL = drive number (00h = A:, 01h = B:, etc)
        CX = number of sectors to read (not FFFFh)
        DX = starting logical sector number (0000h - highest sector on drive)
        DS:BX -> buffer for data
Return: CF clear if successful
        CF set on error
            AH = status (see #02547)
            AL = error code (same as passed to INT 24 in DI)
            AX = 0207h if more than 64K sectors on drive -- use new-style call
        may destroy all other registers except segment registers
Notes:  original flags are left on stack, and must be popped by caller
        this call bypasses the DOS filesystem
        examination of CPWIN386.CPL indicates that if this call fails with
          error 0408h on an old-style (<32M) call, one should retry the
          call with the high bit of the drive number in AL set
        Novell DOS 7 decides whether the old-style or new-style (>32M) version
          of INT 25 must be used solely on the basis of the partition's size,
          thus forcing use of the new-style call even for data in the first
          32M of the partition
BUGS:   DOS 3.1 through 3.3 set the word at ES:[BP+1Eh] to FFFFh if AL is an
          invalid drive number
        DR DOS 3.41 will return with a jump instead of RETF, leaving the
          wrong number of bytes on the stack; use the huge-partition version
          (INT 25/CX=FFFFh) for all partition sizes under DR DOS 3.41
SeeAlso: INT 13/AH=02h,INT 25/CX=FFFFh,INT 26,INT 21/AX=7305h

(Table 02547)
Values for disk I/O status:
 80h    device failed to respond (timeout)
 40h    seek operation failed
 20h    controller failed
 10h    data error (bad CRC)
 08h    DMA failure
 04h    requested sector not found
 03h    write-protected disk (INT 26 only)
 02h    bad address mark
 01h    bad command
--------D-25----CXFFFF-----------------------
INT 25 - DOS 3.31+ - ABSOLUTE DISK READ (32M-2047M hard-disk partition)
        CX = FFFFh
        AL = drive number (0=A, 1=B, etc)
        DS:BX -> disk read packet (see #02548)
Return: CF clear if successful
        CF set on error
            AH = status (see #02547)
            AL = error code (same as passed to INT 24 in DI)
            AX = 0207h for FAT32 drive -- use INT 21/AX=7305h
        may destroy all other registers except segment registers; Win9X always
          sets SI to 0000h due to an apparent coding bug
Notes:  partition is potentially >32M (and requires this form of the call) if
          bit 1 of the device attribute word in the device driver is set
        original flags are left on stack, and must be removed by caller
        this call bypasses the DOS filesystem
        for FAT32 drives (which may be up to 2TB in size), use INT 21/AX=7305h
SeeAlso: INT 13/AH=02h,INT 25,INT 26/CX=FFFFh,INT 21/AX=7305h

Format of disk read packet:
Offset  Size    Description     (Table 02548)
 00h    DWORD   sector number
 04h    WORD    number of sectors to read
 06h    DWORD   transfer address
SeeAlso: #02552
--------k-25CDCD-----------------------------
INT 25 - Stacker - GET DEVICE DRIVER ADDRESS
        AX = CDCDh
        DS:BX -> buffer for address (see #02549)
        CX = 0001h
        DX = 0000h
Return: AX = CDCDh if Stacker installed
            DS:BX buffer filled
Note:   not supported by Stacker Anywhere; to obtain the Stacker device
          driver address and to detect drives controlled by all versions
          of Stacker, INT 21/AX=4404h"Stacker" or lookup via the CDS and DPB
          should be preferred (see INT 21/AH=52h)
        Stacker Anywhere does not link its built-in device driver into
          the standard device driver chain, but it can be found via CDS/DPB
SeeAlso: INT 21/AX=4404h"Stacker"

Format of Stacker v2+ driver address buffer:
Offset  Size    Description     (Table 02549)
 00h    WORD    signature CDCDh
 02h    WORD    ??? 0001h
 04h    DWORD   pointer to Stacker signature at device driver offset 1Ah
                  (see #02550)

Format of Stacker v2+ device driver:
Offset  Size    Description     (Table 02550)
 00h    DWORD   pointer to next driver, offset=FFFFh if last driver
                FFFFh:FFFFh for Stacker Anywhere
 04h    WORD    device attributes (see #01647,#01648)
 06h    WORD    device strategy entry point
 08h    WORD    device interrupt entry point
 0Ah    BYTE    number of subunits (drives) supported by driver
                0 for Stacker Anywhere
 0Bh  7 BYTEs   signature "STAC-CD" for Stacker and Stacker Anywhere
 12h  7 BYTEs   ???
 19h    BYTE    always = 01h ?? (Stacker Anywhere points here)
 1Ah    WORD    signature A55Ah (all other Stacker versions point here)
 1Ch    WORD    Stacker version * 64h
                0C8h = 200, 012Ch = 300, 0190h = 400 (also Stacker Anywhere)
 1Eh    WORD    offset of volume-specific information offset table
                (list of WORDs, one per drive, containing offsets to various
                  information)
 20h 56 BYTEs   n/a
 58h    BYTE    volume number, set after INT 21/AX=4404h, INT 21/AX=4408h
                (use to index into volume-specific info offset table,
                should be set to FFh before and tested for change after)
 59h 19 BYTEs   n/a
 6Ch  4 BYTEs   ASCII string "SWAP"
 70h 26 BYTEs   drive mapping table (one byte for each drive A: through Z:)
                (only used for drives swapped by SSWAP.COM; other drives
                compressed by Stacker can be found with the standard device
                driver header signature (see INT 21/AH=52h)
---Stacker 4, Stacker Anywhere---
 8Ah 40 BYTEs   ???
 B2h  4 BYTEs   ASCII string "SWP2"
 B6h 26 BYTEs   drive table ???
 D0h 150 BYTEs  ???
166h 60 BYTEs   LZSINFO structure (see #02808 at INT 2F/AX=4A12h)
SeeAlso: #02551,#01646 at INT 21/AH=52h

Format of Stacker boot record:
Offset  Size    Description     (Table 02551)
1F0h  8 BYTEs   Stacker signature (first byte is CDh)
1F8h    DWORD   pointer to start of Stacker device driver
1FCh    WORD    Stacker volume number
1FEh    WORD    ???
SeeAlso: #02550
--------c-25--FFSI4358-----------------------
INT 25 - PC-CACHE.SYS - INSTALLATION CHECK
        AL = FFh
        SI = 4358h
Return: SI = 6378h if installed
            CX = segment of device driver PC-CACHE.SYS
            DX = version (major in DH, minor in DL)
Program: PC-CACHE.SYS is a small device driver used by PC-Cache v5.x to obtain
          access to certain disk drivers for devices such as Bernoulli drives
SeeAlso: INT 13/AH=A0h
--------!---Section--------------------------
Interrupt List, part 11 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------D-26---------------------------------
INT 26 - DOS 1+ - ABSOLUTE DISK WRITE (except partitions > 32M)
        AL = drive number (00h = A:, 01h = B:, etc)
        CX = number of sectors to write (not FFFFh)
        DX = starting logical sector number (0000h - highest sector on drive)
        DS:BX -> data to write
Return: CF clear if successful
        CF set on error
            AH = status (see #02547)
            AL = error code (same as passed to INT 24 in DI)
            AX = 0207h if more than 64K sectors on drive -- use new-style call
        may destroy all other registers except segment registers
Notes:  original flags are left on stack, and must be popped by caller
        this call bypasses the DOS filesystem, though DOS 5+ invalidates any
          disk buffers referencing sectors which are written with this call
        examination of CPWIN386.CPL indicates that if this call fails with
          error 0408h on an old-style (<32M) call, one should retry the
          call with the high bit of the drive number in AL set
        Novell DOS 7 decides whether the old-style or new-style (>32M) version
          of INT 26 must be used solely on the basis of the partition's size,
          thus forcing use of the new-style call even for data in the first
          32M of the partition
        Windows98 will display an error message and deliberately hang the
          system on attempted write to any hard disk if neither bit 7 of the
          Extended Drive Info byte nor bit 6 of "DOS_FLAG" (List-of-Lists+60h)
          is set
BUGS:   DOS 3.1 through 3.3 set the word at ES:[BP+1Eh] to FFFFh if AL is an
          invalid drive number
        DR DOS 3.41 will return with a jump instead of RETF, leaving the
          wrong number of bytes on the stack; use the huge-partition version
          (INT 26/CX=FFFFh) for all partition sizes under DR DOS 3.41
SeeAlso: INT 13/AH=03h,INT 25,INT 26/CX=FFFFh,INT 21/AX=7305h
--------D-26----CXFFFF-----------------------
INT 26 - DOS 3.31+ - ABSOLUTE DISK WRITE (32M-2047M hard-disk partition)
        CX = FFFFh
        AL = drive number (0=A, 1=B, etc)
        DS:BX -> disk write packet (see #02552)
Return: CF clear if successful
        CF set on error
            AH = status (see #02547)
            AL = error code (same as passed to INT 24 in DI)
        may destroy all other registers except segment registers
Notes:  partition is potentially >32M (and requires this form of the call) if
          bit 1 of the device attribute word in the device driver is set
        original flags are left on stack, and must be removed by caller
        this call bypasses the DOS filesystem, though DOS 5+ invalidates any
          disk buffers referencing sectors which are written with this call
        for FAT32 drives (which may be up to 2TB in size), use INT 21/AX=7305h
        Windows98 will display an error message and deliberately hang the
          system on attempted write to any hard disk if neither bit 7 of the
          Extended Drive Info byte nor bit 6 of "DOS_FLAG" (List-of-Lists+60h)
          is set
SeeAlso: INT 13/AH=03h,INT 25/CX=FFFFh,INT 26,INT 21/AX=7305h

Format of disk write packet:
Offset  Size    Description     (Table 02552)
 00h    DWORD   sector number
 04h    WORD    number of sectors to read
 06h    DWORD   transfer address
SeeAlso: #02548
--------G-26---------------------------------
INT 26 - COMTROL HOSTESS i/ISA DEBUGGER - ENTER/EXIT EXTENDED ADDRESSING MODE
        ???
Return: ???
SeeAlso: INT 23"COMTROL",INT 27"COMTROL"
--------D-27---------------------------------
INT 27 - DOS 1+ - TERMINATE AND STAY RESIDENT
        DX = number of bytes to keep resident (max FFF0h)
        CS = segment of PSP
Return: never
Notes:  this is an obsolete call
        INT 22, INT 23, and INT 24 are restored from the PSP
        does not close any open files
        the minimum number of bytes which will remain resident is 110h for
          DOS 2.x and 60h for DOS 3.0+; there is no minimum for DOS 1.x, which
          implements this service in COMMAND.COM rather than the DOS kernel
SeeAlso: INT 21/AH=31h
--------G-27---------------------------------
INT 27 - COMTROL HOSTESS i/ISA DEBUGGER - INVOKE REMOTE TURBO DEBUGGER KERNEL
        ???
Return: ???
Desc:   invoke a copy of the remote Turbo Debugger kernel on the Hostess i
          controller
SeeAlso: INT 20"COMTROL",INT 26"COMTROL"
--------D-28---------------------------------
INT 28 C - DOS 2+ - DOS IDLE INTERRUPT
        SS:SP = top of MS-DOS stack for I/O functions
Return: all registers preserved
Desc:   This interrupt is invoked each time one of the DOS character input
          functions loops while waiting for input.  Since a DOS call is in
          progress even though DOS is actually idle during such input waits,
          hooking this function is necessary to allow a TSR to perform DOS
          calls while the foreground program is waiting for user input.  The
          INT 28h handler may invoke any INT 21h function except functions
          00h through 0Ch.
Notes:  under DOS 2.x, the critical error flag (the byte immediately after the
          InDOS flag) must be set in order to call DOS functions 50h/51h from
          the INT 28h handler without destroying the DOS stacks.
        calls to INT 21/AH=3Fh,40h from within an INT 28 handler may not use a
          handle which refers to CON
        at the time of the call, the InDOS flag (see INT 21/AH=34h) is normally
          set to 01h; if larger, DOS is truly busy and should not be reentered
        the default handler is an IRET instruction
        supported in OS/2 compatibility box
        the _MS-DOS_Programmer's_Reference_ for DOS 5.0 incorrectly documents
          this interrupt as superseded
        the performance of NetWare Lite servers (and probably other peer-to-
          peer networks) can be dramatically improved by calling INT 28
          frequently from an application's idle loop
SeeAlso: INT 21/AH=34h,INT 2A/AH=84h,INT 2F/AX=1680h
--------U-289999-----------------------------
INT 28 u - PCXDUMP v9.00+ - INSTALLATION CHECK
        AX = 9999h
Return: AX = AAAAh if installed
            CX = version number * 100 (example: 03A2h = 930 = v9.30)
            DL = interrupt used by the dump function (see #02553)
                (00h if call not available)
            BX = CS of PCXDUMP's INT 28 handler (undocumented)
            ES = segment of PCXDUMP's memory block (v9.30, undocumented)
Program: PCXDUMP is a shareware screen grabber saving in PCX format
Notes:  if DL<>00h a dump can be requested by calling INT DL as shown
          below (the user can choose the interrupt number at installation
          time); if DL=00h the dump function can be called only by hotkeys
          (this is the default)

(Table 02553)
Call PCXDUMP screen-dump function with:
        INT xx
        AX = 1234h
        BX = dump type
            0000h Color dump
            0001h Immediate color dump
            0002h Black/White dump
            0003h Immediate B/W dump
            0004h Inverted B/W dump
            0005h Gray scaled dump
            0006h Inverted gray scaled dump
            0007h Text screen dump to text file
            0008h Text screen dump to ansi file
Return: nothing
Notes:  if BX=0001h, 0003h, 0007h or 0008h the whole screen will be
          dumped; the other valid values will draw a selection frame
          on the screen except in text modes (text modes allow only
          full screen dumps)
        this function doesn't perform the dump, it only requests it;
          the dump will be performed after a few milliseconds if it's
          safe to do so, thus the author recommends putting a 60 ms delay
          after this call
--------D-29---------------------------------
INT 29 C - DOS 2+ - FAST CONSOLE OUTPUT
        AL = character to display
Return: nothing
        BX may be destroyed by some versions of DOS 3.3
Notes:  automatically called when writing to a device with bit 4 of its device
          driver header set (see also INT 21/AH=52h)
        COMMAND.COM v3.2 and v3.3 compare the INT 29 vector against the INT 20
          vector and assume that ANSI.SYS is installed if the segment is larger
        the default handler under DOS 2.x and 3.x simply calls INT 10/AH=0Eh
        the default handler under DESQview 2.2 understands the <Esc>[2J
          screen-clearing sequence, calls INT 10/AH=0Eh for all others
SeeAlso: INT 21/AH=52h,INT 2F/AX=0802h,INT 79"AVATAR.SYS"
--------U-29E60DCL0E-------------------------
INT 29 - ShowGFX - INSTALLATION CHECK
        AX = E60Dh
        CL = 0Eh
        DX = C0DEh
Return: DX = DEC0h
Program: ShowGFX is a PCBoard graphics driver by Solar Designer
--------N-2A00-------------------------------
INT 2A - NETWORK - INSTALLATION CHECK
        AH = 00h
Return: AH <> 00h if installed
        CF set if NetWare v2.15 NetBIOS emulator installed
Note:   supported by PC LAN Program, LAN Manager, LANtastic, NetWare, 10NET,
          etc.
SeeAlso: INT 5C"NetBIOS"
--------N-2A0000-----------------------------
INT 2A - AT&T Starlan Extended NetBIOS (var length names) - INSTALLATION CHECK
        AX = 0000h
Return: AH = DDh
SeeAlso: INT 5B"Extended NetBIOS"
--------N-2A01-------------------------------
INT 2A - NETWORK (Microsoft,LANtastic) - EXECUTE NETBIOS REQUEST,NO ERROR RETRY
        AH = 01h
        ES:BX -> NCB (see #03249 at INT 5C"NetBIOS")
Return: AL = NetBIOS error code
        AH = status
            00h no error
            01h error occurred
SeeAlso: AH=04h,AX=0500h,INT 5B"Extended NetBIOS",INT 5C"NetBIOS"
--------N-2A02-------------------------------
INT 2A - NETWORK (Microsoft) - SET NET PRINTER MODE
        AH = 02h
        ???
Return: ???
--------N-2A0300-----------------------------
INT 2A - NETWORK - CHECK DIRECT I/O
        AX = 0300h
        DS:SI -> ASCIZ device name (may be full path or only drive specifier--
                  must include the colon)
Return: CF clear if direct physical addressing (INT 13,INT 25) permissible
        CF set if access via files only
Notes:  do not use direct disk accesses if this function returns CF set or the
          device is redirected (INT 21/AX=5F02h)
        use AH=00h to determine whether the network is installed; if not,
          direct physical access is allowed
        may take some time to execute, so programs which need to check
          frequently should save the result of the first call
        this function is called by the DOS kernel on INT 25 and INT 26
        supported by PC LAN Program, LAN Manage, LANtastic, NetWare, 10NET,
          etc.
SeeAlso: INT 13/AH=02h,INT 13/AH=03h,INT 25,INT 26,INT 21/AX=5F02h
--------N-2A04-------------------------------
INT 2A - NETWORK - EXECUTE NetBIOS REQUEST
        AH = 04h
        AL = error retry
            00h automatically retry request on errors 09h, 12h, and 21h
                  (see #03248 at INT 5C"NetBIOS")
            01h no retry
            02h ???
        ES:BX -> Network Control Block (see #03249 at INT 5C"NetBIOS")
Return: AX = 0000h if successful
        AH = 01h on error
            AL = error code
Notes:  invokes either INT 5B or INT 5C as appropriate
        supported by PC LAN Program, LANtastic, LAN Manager, NetWare, 10NET,
          etc.
        NetWare 2.15 NetBIOS emulator returns CF clear if successful, CF set
          on error
        PC LAN Program defines any non-zero return value in AH as an error
          indicator for subfunction 00h, and any non-zero return value in AX
          as an error indicator for subfunction 01h
SeeAlso: AH=00h,AH=01h,AX=0500h,INT 5B"Extended NetBIOS",INT 5C"NetBIOS"
--------N-2A0500-----------------------------
INT 2A - NETWORK - GET NETWORK RESOURCE AVAILABILITY
        AX = 0500h
Return: AX reserved
        BX = number of network names available
        CX = number of network control blocks available
        DX = number of network sessions available
Notes:  supported by PC LAN Program, LAN Manager, LANtastic, NetWare, 10NET,
          etc.
        the application should call this function before using any network
          resources, and maintain its own count to avoid exceeding the
          network's resource limits
SeeAlso: AH=00h,AH=01h,AH=04h,INT 5C"NetBIOS"
--------N-2A06-------------------------------
INT 2A - NETBIOS, LANtastic - NETWORK PRINT-STREAM CONTROL
        AH = 06h
        AL = function
            01h set concatenation mode
                all printer output put in one job until return to DOS prompt
            02h set truncation mode (default)
                printer open/close or BIOS/DOS output switch starts new job
            03h flush printer output and start new print job
Return: CF set on error
            AX = error code
        CF clear if successful
Notes:  subfunction 03h is equivalent to Ctrl/Alt/keypad-*
        supported by PC LAN Program, LANtastic, NetWare, 10NET, etc.
        LANtastic v4.x no longer supports this call
        this function sets the printer mode for all redirected printers
SeeAlso: INT 21/AX=5D08h,INT 21/AX=5D09h,INT 2F/AX=1125h
--------N-2A07-------------------------------
INT 2A U - PC Network v1.00 - RECEIVER.COM - ???
        AH = 07h
        ???
Return: ???
Program: PC Network is an early networking package which was renamed the
          IBM PC Local Area Network Program (PC LAN Program) as of v1.10
SeeAlso: AH=86h
--------N-2A2001-----------------------------
INT 2A - MS Networks or NETBIOS - ???
        AX = 2001h
        ???
Return: ???
Note:   intercepted by DESQview 2.x
--------N-2A2002-----------------------------
INT 2A - NETWORK - ???
        AX = 2002h
        ???
Return: ???
Note:   called by MS-DOS 3.30-6.00 APPEND
--------N-2A2003-----------------------------
INT 2A - NETWORK - ???
        AX = 2003h
        ???
Return: ???
Note:   called by MS-DOS 3.30-6.00 APPEND
--------N-2A4147DX0000-----------------------
INT 2A U - NetSoft DOS-NET v1.20+ - INSTALLATION CHECK
        AX = 4147h ('AG')
        DX = 0000h
Return: DX = 4147h if installed
            DS:SI -> configuration data (see #02554)
Program: DOS-NET is a shareware networking package by Albert Graham
Note:   this call is supported by CLIENT.COM, SERVER.COM, ROUTER.COM, and
          NETDOS.COM
SeeAlso: INT 65/DX=4147h,INT 65/DX=4741h

Format of DOS-NET v1.20 configuration data area:
Offset  Size    Description     (Table 02554)
 00h    BYTE    ???
 01h    BYTE    interrupt number used by DOS-NET APIs
 02h    WORD    function number to place in AX for above interrupt
 04h    BYTE    minor version as two BCD digits (e.g. 20h for v1.20)
 05h    BYTE    major version number (01h for v1.20)
 06h  2 BYTEs   ???
 08h    WORD    ??? (used by ARCNET.COM)
                bit 15: ??? (set by MACTEST.COM)
 0Ah    WORD    ??? (used by NDIS.COM and ODI.COM)
 0Ch 22 BYTEs   ???
 24h    DWORD   -> ??? function (set by PROTECT.COM)
 28h 12 BYTEs   ???
 34h    DWORD   -> ??? function (set by FASTVIEW.COM)
 38h    DWORD   -> ??? function (set by FASTVIEW.COM)
 58h    DWORD   -> ??? (offsets 04h and 1Ah from value are used by NETFILES)
        ???
 7Ch    WORD    ???
 7Eh    WORD    ??? (may be high half of a DWORD at 7Ch)
        ???
 A8h    DWORD   -> ??? (used by SM.COM)
        ???
114h    WORD    ???
116h    WORD    ??? (may be high half of a DWORD at 114h)
        ???
1BDh    BYTE    ??? flags
                bit 0: ???
                bit 6: ???
        ???
1E1h    BYTE    ???
        ???
208h    WORD    ??? (used by SM.COM, MACTEST)
282h    WORD    ???
284h  2 BYTEs   ???
286h    WORD    ??? flags
                bit 0: ???
        ???
31Eh    WORD    ???
320h    WORD    ??? (used by NDIS.COM and ODI.COM)
322h  8 BYTEs   ???
32Ah    WORD    ??? (used by NDIS.COM and ODI.COM)
        ???
33Eh  4 BYTEs   ??? (used by ODI.COM)
342h  N BYTEs   ??? (used by NDIS.COM)
        ???
3CFh    BYTE    ??? flags
                bit 2: ???
3D2h    BYTE    installed-component flags
                bit 0: PROTECT installed
                bit 1: NETCACHE installed
                bit 3: SM.COM installed
                bit 7: NETDEBUG installed
3D3h    BYTE    installed-component flags
                bit 0: NETFILES installed
                bit 6: FASTVIEW installed
        ???
3FFh    BYTE    ??? (used by NDIS.COM)
400h    BYTE    ???
401h    BYTE    ??? (used by SM.COM)
402h    BYTE    ??? (used by SM.COM)
        ???
448h    BYTE    ???
449h    BYTE    ??? (used by MACTEST)
44Ah    BYTE    ??? (used by PROTECT)
44Bh    BYTE    ???
44Ch    BYTE    ???
44Dh    BYTE    ??? (used by SM.COM)
44Eh    BYTE    ??? (used by SM.COM, MACTEST)
        ???
--------N-2A7802-----------------------------
INT 2A - NETWORK - PC LAN PROG v1.31+ - GET LOGGED ON USER NAME
        AX = 7802h
        ES:DI -> 8-byte buffer to be filled
Return: AL = 00h if no user logged on to Extended Services
        AL <> 00h if user logged on to Extended Services
            buffer at ES:DI filled with name, padded to 8 chars with blanks.
--------D-2A80-------------------------------
INT 2A CU - NETWORK - BEGIN DOS CRITICAL SECTION
        AH = 80h
        AL = critical section number (00h-0Fh) (see #02555)
Notes:  normally hooked to avoid interrupting a critical section, rather than
          called
        the handler should ensure that none of the critical sections are
          reentered, usually by suspending a task which attempts to reenter
          an active critical section
        the DOS kernel does not invoke critical sections 01h and 02h unless it
          is patched.  DOS 3.1+ contains a zero-terminated list of words
          beginning at offset -11 from the Swappable Data Area
          (see #01687 at INT 21/AX=5D06h); each word contains the offset within
          the DOS data segment of a byte which must be changed from C3h (RET)
          to 50h (PUSH AX) under DOS 3.x or from 00h to a nonzero value under
          DOS 4.0+ to enable use of critical sections.  For DOS 4.0+, all
          words in this list point at the byte at offset 0D0Ch.
        MS Windows patches the DOS kernel's calls to INT 2A/AH=80h-81h into
          far calls to its own handler, and does not reflect the calls back
          to INT 2A unless SYSTEM.INI contains ReflectDOSInt2A=1 or
          ModifyDOSInt2A=0 in the [386Enh] section
        Novell NETX does not issue INT 2A/AH=80h and INT 2A/AH=81h calls when
          it intercepts INT 21 calls and processes them itself
SeeAlso: AH=81h,AH=82h,AX=8700h,INT 21/AX=5D06h,INT 21/AX=5D0Bh

(Table 02555)
Values for DOS critical section number:
 01h    DOS kernel, SHARE.EXE, DOSMGR
        apparently for maintaining the integrity of DOS/SHARE/NET
          data structures
 02h    DOS kernel, DOSMGR
        ensures that no multitasking occurs while DOS is calling an
          installable device driver
 05h    network redirector
 06h    DOS 4.x only IFSFUNC
 08h    ASSIGN.COM
 0Ah    MSCDEX, CORELCDX
 0Fh    IBM PC LAN server (while intercepting INT 10/AH=06h,07h,0Eh)
--------D-2A81-------------------------------
INT 2A CU - NETWORK - END DOS CRITICAL SECTION
        AH = 81h
        AL = critical section number (00h-0Fh) (see #02555)
Notes:  normally hooked rather than called
        the handler should reawaken any tasks which were suspended due to an
          attempt to enter the specified critical section
        MS Windows patches the DOS kernel's calls to INT 2A/AH=80h-81h into
          far calls to its own handler, and does not reflect the calls back
          to INT 2A unless SYSTEM.INI contains ReflectDOSInt2A=1 or
          ModifyDOSInt2A=0 in the [386Enh] section
SeeAlso: AH=80h,AH=82h,AX=8700h
--------D-2A82-------------------------------
INT 2A CU - NETWORK - END DOS CRITICAL SECTIONS 0 THROUGH 7
        AH = 82h
Notes:  called by the INT 21h function dispatcher for function 0 and functions
          greater than 0Ch except 59h, and on process termination
        the handler should reawaken any tasks which were suspended due to an
          attempt to enter one of the critical sections 0 through 7
SeeAlso: AH=81h
--------N-2A84-------------------------------
INT 2A CU - NETWORK - KEYBOARD BUSY LOOP
        AH = 84h
Note:   similar to DOS's INT 28h, called from inside the DOS keyboard input
          loop (i.e. INT 21/AH=07h or INT 21/AH=08h) to allow the network
          software to process requests
SeeAlso: INT 28
--------N-2A86-------------------------------
INT 2A U - PC Network v1.00 - RECEIVER.COM - ???
        AH = 86h
        ???
Return: ???
SeeAlso: AH=07h,AH=C4h
--------P-2A8700-----------------------------
INT 2A CU - PRINT - BEGIN BACKGROUND PRINTING
        AX = 8700h
        CF clear
Return: CF clear if OK to print in background now
        CF set if background printing not allowed at this time
Desc:   used to inform interested programs that PRINT is about to start its
          background processing, and allow those programs to postpone the
          processing if necessary
Notes:  when PRINT gains control and wants to begin printing, it calls this
          function.  If CF is clear on return, PRINT begins its background
          processing, and calls AX=8701h when it is done.  If CF is set on
          return, PRINT will relinquish control immediately, and will not
          call AX=8701h
        PCVENUS (an early network shell by IBM and CMU) hooks this call to
          prevent background printing while its own code is active
SeeAlso: AH=80h,AH=81h,AX=8701h
--------P-2A8701-----------------------------
INT 2A CU - PRINT - END BACKGROUND PRINTING
        AX = 8701h
Desc:   used to inform interested programs that PRINT has completed its
          background processing
Note:   called by PRINT after it has performed some background printing; not
          called if AX=8700h returned with CF set.
SeeAlso: AX=8700h
--------N-2A89-------------------------------
INT 2A U - PC Network v1.00 - RECEIVER.COM - ???
        AH = 89h
        AL = ???  (ASSIGN uses 08h)
        ???
Return: ???
--------I-2A90-------------------------------
INT 2A U - IBM PC 3270 EMULATION PROGRAM - ???
        AH = 90h
        ???
Return: ???
Note:   the LANtastic redirector and SERVER.EXE use this function with AL=01h,
          03h-07h,0Ch-11h
--------N-2AC2-------------------------------
INT 2A U - Network - ???
        AH = C2h
        AL = subfunction
            07h ???
            08h ???
        BX = 0001h
        ???
Return: ???
Note:   this function is called by the DOS 3.30-6.00 APPEND
--------N-2AC4-------------------------------
INT 2A U - PC Network v1.00 - RECEIVER.COM - ???
        AH = C4h
        AL = subfunction
            07h ???
            08h ???
        BX = ???
        ???
Return: ???
SeeAlso: AH=86h
--------N-2AD800-----------------------------
INT 2A U - Novell NetWare Lite - SERVER - SET ???
        AX = D800h
Return: nothing
Desc:   sets ??? flag, and sets ??? to initial value
Note:   called by CLIENT
SeeAlso: AX=D801h,AX=D850h
--------N-2AD801-----------------------------
INT 2A U - Novell NetWare Lite - SERVER - RESET ???
        AX = D801h
Return: nothing
Desc:   clears the ??? flag set by AX=D800h
Note:   called by CLIENT
SeeAlso: AX=D800h,AX=D850h
--------N-2AD850-----------------------------
INT 2A U - Novell NetWare Lite - CLIENT - INCREMENT ???
        AX = D850h
Return: nothing
Desc:   increments an internal byte-sized counter
Note:   this function is intercepted by DV/X 1.10 PEERSERV.DVR and the
          Advanced NetWare 4.0 DOS Requester
SeeAlso: AX=D851h
--------N-2AD851-----------------------------
INT 2A U - Novell NetWare Lite - CLIENT - RESET ???
        AX = D851h
Return: nothing
Desc:   resets an internal byte-sized counter to zero
Note:   this function is intercepted by DV/X 1.10 PEERSERV.DVR and the
          Advanced NetWare 4.0 DOS Requester
SeeAlso: AX=D850h
--------N-2AD852-----------------------------
INT 2A U - Novell NetWare - DOS Requester v1.03 - ???
        AX = D852h
Return: ???
Note:   calls the NetWare Lite SERVER installation check, and sets ??? pointer
SeeAlso: AX=D853h,INT 2F/AX=D880h
--------N-2AD853-----------------------------
INT 2A U - Novell NetWare - DOS Requester v1.03 - ???
        AX = D853h
Return: ???
Note:   clears the pointer set by AX=D852h
SeeAlso: AX=D852h
--------N-2AE0-------------------------------
INT 2A U - PC Network 1.00 - ???
        AH = E0h
        AL = subfunction??? (01h,02h, maybe others)
        ???
Return: ???
Note:   called by PCNet 1.00 NET.COM, a shell program from which others are run
--------N-2AFF90-----------------------------
INT 2A - PC/TCP PREDIR.EXE - ???
        AX = FF90h
Return: AX = ???
Note:   PREDIR.EXE is the network printer redirector included as part of the
          PC/TCP system by FTP Software, Inc.
--------N-2AFF91-----------------------------
INT 2A - PC/TCP PREDIR.EXE - ???
        AX = FF91h
        BX = ???
Return: AX = status???
--------N-2AFF92-----------------------------
INT 2A - PC/TCP PREDIR.EXE - INSTALLATION CHECK
        AX = FF92h
Return: AX = 0000h if installed
           BX = redirected printer port (FFFFh if no printers redirected)
           CX = version (CH = major, CL = minor)
Note:   PREDIR.EXE is the network printer redirector included as part of the
          PC/TCP system by FTP Software, Inc.
--------N-2AFF93-----------------------------
INT 2A - PC/TCP PREDIR.EXE - ???
        AX = FF93h
Return: AX = ???
--------N-2AFF94-----------------------------
INT 2A - PC/TCP PREDIR.EXE - ???
        AX = FF94h
        BX = ???
        CX = ???
        DX = ???
Return: AX = ???
Note:   PREDIR.EXE is the network printer redirector included as part of the
          PC/TCP system by FTP Software, Inc.
--------N-2AFF95-----------------------------
INT 2A - PC/TCP PREDIR.EXE - GET CONFIGURATION STRINGS
        AX = FF95h
        CX = what to get
            0000h ??? (returned pointer to "C:\COMMAND.COM")
            0001h spooling program
            0002h ???
            0003h spool file name
            0004h swap file name
Return: AX = status
            0000h successful
        BX:DX -> ASCIZ configuration string
--------N-2AFF96-----------------------------
INT 2A - PC/TCP PREDIR.EXE - SET PRINT JOB TERMINATION CONFIGURATION
        AX = FF96h
        CX = what to set
            0000h ???
            0001h print-on-hotkey state
            0002h print-on-exit state
            0003h print job timeout in clock ticks
            0004h print-on-EOF state
        BX = new value (0000h disabled, 0001h enabled except for timeout)
Return: AX = ???
SeeAlso: AX=FF97h
Note:   PREDIR.EXE is the network printer redirector included as part of the
          PC/TCP system by FTP Software, Inc.
--------N-2AFF97-----------------------------
INT 2A - PC/TCP PREDIR.EXE - GET PRINT JOB TERMINATION CONFIGURATION
        AX = FF97h
        CX = what to get
            0000h ???
            0001h print-on-hotkey state
            0002h print-on-exit state
            0003h print job timeout in clock ticks
            0004h print-on-EOF state
Return: AX = status
            0000h successful
        BX = old value (0000h disabled, 0001 enabled except for timeout)
SeeAlso: AX=FF96h
--------D-2B---------------------------------
INT 2B - DOS 2+ - RESERVED
Note:   this vector is not used in MS-DOS versions <= 6.22, and points at an
          IRET instruction
--------D-2B---------------------------------
INT 2B - IBM ROM-DOS v4.0 - ???
        AH = function
            00h ??? (modifies data in IBMBIO.COM)
            01h internal operations
            02h ???
                AL = index (00h-0Ch)
                Return: AX = ??? or (CMOS 2Dh and CMOS 2Eh)
            03h get ??? data
                Return: AX = (CMOS 2Dh and CMOS 2Eh)
                        BX = FFFFh
            other does nothing
Note:   function 03h is called by ROMSHELL.COM; if BX != 0, then the ES:DI from
          INT 2F/AX=1982h points at valid data
SeeAlso: INT 2F/AX=1982h
--------D-2C---------------------------------
INT 2C - DOS 2+ - RESERVED
Note:   this vector is not used in DOS versions <= 6.00, and points at an IRET
--------O-2C---------------------------------
INT 2C - STARLITE architecture - KERNEL API
Note:   STARLITE is an architecture by General Software for a series of MS-DOS
          compatible operating systems (OEM DOS, NETWORK DOS, and SMP DOS) to
          be released in 1991.  The interrupt number is subject to change
          before the actual release.
--------m-2C---------------------------------
INT 2C R - Cloaking - CALL PROTECTED-MODE PASSALONG CHAIN
Notes:  when this interrupt is invoked in V86 mode, RM386 will invoke the first
          in a chain of protected-mode handlers, and will only pass execution
          to the V86-mode INT 2C handler if none of the handlers in the
          passalong chain handle the call instead.  This is the method by which
          the real-mode stub of a cloaked application communicates with the
          protected-mode portion.
        the cloaking host calls the passalong chain with EAX=58494E33h ('WIN3')
          when MS Windows starts up and with EAX=334E4958h ('3NIW') when
          Windows shuts down; between these two broadcasts, the additional
          Windows-only Cloaking services are available
        this function was first introduced with RM386 (RAM-MAN/386) v6.00, the
          memory manager included in Helix Software's Netroom
SeeAlso: INT 2C/AX=0009h,INT 2F/AX=4310h"Cloaking"
--------m-2C0000-----------------------------
INT 2C P - Cloaking - ALLOCATE GDT SELECTOR
        AX = 0000h
        EBX = base address
        CL = access mode byte
        CH = extended access mode byte (omit limit field)
        EDX = segment limit
Return: CF clear if successful
            AX = selector
        CF set on error
            AX = error code (see #02556)
Notes:  this INT 2C interface is used by Netroom's DPMI.EXE v3.00
        to access extended memory, set the base address to the desired
          physical address plus 400000h (4M)
        this function was first introduced with RM386 (RAM-MAN/386) v6.00, the
          memory manager included in Helix Software's Netroom
SeeAlso: AX=0001h,AX=0002h,AX=0003h,AX=0004h,AX=0005h,INT 31/AH=57h,#00501

(Table 02556)
Values for Cloaking error code:
 0001h  no more selectors
 0002h  not a GDT ring 0 selector
 0003h  invalid selector (out of range, not user selector)
 0004h  selector not allocated
--------m-2C0001-----------------------------
INT 2C P - Cloaking - FREE GDT SELECTOR
        AX = 0001h
        SI = selector
Return: CF clear if successful
        CF set on error
            AX = error code (see #02556)
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=0000h,INT 2F/AX=4310h"Cloaking"
--------m-2C0002-----------------------------
INT 2C P - Cloaking - SET SEGMENT BASE ADDRESS
        AX = 0002h
        SI = selector
        EBX = new physical base addres
Return: CF clear if successful
        CF set on error
            AX = error code (see #02556)
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=0000h,AX=0003h,AX=0004h,INT 31/AX=0007h,#00501
--------m-2C0003-----------------------------
INT 2C P - Cloaking - SET SEGMENT LIMIT
        AX = 0003h
        SI = selector
        EBX = new limit
Return: CF clear if successful
        CF set on error
            AX = error code (see #02556)
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=0000h,AX=0002h,AX=0004h,INT 31/AX=0008h
--------m-2C0004-----------------------------
INT 2C P - Cloaking - SET SEGMENT ACCESS MODE
        AX = 0004h
        SI = selector
        CL = new access mode byte (see #00502)
Return: CF clear if successful
        CF set on error
            AX = error code (see #02556)
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=0000h,AX=0002h,AX=0003h,AX=0005h,INT 31/AX=0009h
--------m-2C0005-----------------------------
INT 2C P - Cloaking - SET SEGMENT EXTENDED ACCESS MODE
        AX = 0005h
        SI = selector
        CL = new extended access mode byte (limit field ignored) (see #02557)
Return: CF clear if successful
        CF set on error
            AX = error code (see #02556)
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=0000h,AX=0002h,AX=0003h,AX=0004h,INT 31/AX=0009h

Bitfields for extended access mode byte:
Bit(s)  Description     (Table 02557)
 7      4K granularity instead of byte granularity
 6      32-bit code segment
 5      reserved (0)
 4      segment available to system
SeeAlso: #00505
--------m-2C0006-----------------------------
INT 2C P - Cloaking - GET PROTECTED-MODE INTERRUPT VECTOR
        AX = 0006h
        CL = vector (00h-7Fh)
Return: CF clear
        DX:EBX -> current interrupt handler
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=0007h,INT 31/AX=0204h
--------m-2C0007-----------------------------
INT 2C P - Cloaking - SET PROTECTED-MODE INTERRUPT VECTOR
        AX = 0007h
        CL = vector (00h-7Fh)
        DX:EBX -> interrupt handler
Return: CF clear
Notes:  this function was first introduced with RM386 (RAM-MAN/386) v6.00
        the IDT entry's type remains unchanged
SeeAlso: AX=0006h,INT 31/AX=0205h
--------m-2C0008-----------------------------
INT 2C P - Cloaking - GET PASSALONG ADDRESS
        AX = 0008h
Return: CF clear
        DX:EBX = current passalong address
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=0009h,AX=002Ch,INT 2F/AX=4310h"Cloaking"
--------m-2C0009-----------------------------
INT 2C P - Cloaking - SET PASSALONG ADDRESS
        AX = 0009h
        DX:EBX = new value for passalong address (see #02558)
Return: CF clear
Notes:  when an INT 2C instruction is executed in V86 mode, the Cloaking host
          calls the passalong address.  The handler should check whether the
          upcall is of interest to it, and if not it should jump to the old
          passalong address (retrieved with AX=0008h before the handler was
          installed).  The final handler should return with CF clear to cause
          the interrupt to be reflected back to V86 mode if none of the
          passalong handlers is triggered
        this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=0008h,AX=002Dh,INT 2C"PASSALONG CHAIN"

(Table 02558)
Values Cloaking passalong address is called with:
        EAX = CS:IP of byte following INT 2C instruction invoking passalong
        SS:EBX -> caller registers (see #02559)
        CF clear
        others undefined
Return: CF clear: pass along to V86-mode INT 2C handler
        CF set: return immediately to V86 mode

Format of Cloaking caller registers:
Offset  Size    Description     (Table 02559)
 00h    DWORD   EDI
 04h    DWORD   ESI
 08h    DWORD   EBP
 0Ch    DWORD   reserved (ESP from PUSHAD instruction)
 10h    DWORD   EBX
 14h    DWORD   EDX
 18h    DWORD   ECX
 1Ch    DWORD   EAX
 20h    DWORD   error code
 24h    DWORD   EIP
 28h    WORD    CS
 2Ah    WORD    padding
 2Ch    DWORD   EFLAGS
 30h    DWORD   ESP
 34h    WORD    SS
 36h    WORD    padding
--remainder not available if protected-mode ring3 trap---
 38h    WORD    ES
 3Ah    WORD    padding
 3Ch    WORD    DS
 3Eh    WORD    padding
 40h    WORD    FS
 42h    WORD    padding
 44h    WORD    GS
 46h    WORD    padding
--------m-2C000A-----------------------------
INT 2C P - Cloaking - GET BASE ADDRESS OF GDT SELECTOR
        AX = 000Ah
        SI = selector
Return: CF clear if successful
            EBX = segment base address
        CF set on error
            AX = error code (see #02556)
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00, the
          memory manager included in Helix Software's Netroom
SeeAlso: AX=0000h,AX=0002h,AX=000Bh
--------m-2C000B-----------------------------
INT 2C P - Cloaking - GET SELECTOR LIMIT
        AX = 000Bh
        SI = selector
Return: CF clear if successful
            EBX = segment base address
        CF set on error
            AX = error code (see #02556)
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=000Ah,INT 2F/AX=4310h"Cloaking"
--------m-2C---------------------------------
INT 2C P - RM386 v6.00 - CLOAKING - RESERVED FOR CLOAKED BIOS USE UNDER WINDOWS
        AX = function (000Ch-001Fh)
--------m-2C000F-----------------------------
INT 2C P - Cloaking v1.01 - "Simulate_Shell_Event"
        AX = 000Fh
        ECX = event code (see #02560)
        DX = subfunction for event
        EDX high word = boost value (see #02561)
        SI:EDI -> completion procedure
Return: CF clear if successful (event scheduled)
        CF set on error
Note:   this function is only available while MS Windows is running
SeeAlso: AX=0011h,AX=0012h,INT 2F/AX=1605h,INT 2F/AX=4310h"Cloaking"

(Table 02560)
Values for Cloaking shell event code:
 0414h  Hot key event
        subevent 0000h: Alt-Space
        subevent 0001h: Alt-Enter
        subevent 0002h: Dir-VM
 0415h  Switch context
        subevent 0000h for DOS VM context, nonzero for System VM context
 0416h  Clipboard event
 0417h  Termination event
        subevent 0000h for normal termination, nonzero for error
 0418h  Display message
        subevent 0000h for normal message, nonzero for system model ASAP
 0419h  Crash
 041Ah  Paste complete
        subevent 0000h: normal
        subevent 0001h: cancelled by user
        subevent 0002h: cancelled
 041Bh  Contention event
 041Ch  Screen switch
        subevent 0000h: forward
        subevent 0001h: back
 041Dh  Filesystem change
 041Eh  Check Focus
 041Fh  Panic

Bitfields for boost value:
Bit(s)  Description     (Table 02561)
 0      boost system VM until focus changes
 1      boost system VM on Switcher screen
 2      boost system VM until response
 3      boost system VM during clipboard activity
 4      boost system VM during print screen
 5      boost system VM during update
--------m-2C0011-----------------------------
INT 2C P - Cloaking v1.01 - "Switch_VMs_and_Call_back"
        AX = 0011h
        EBX = handle of VM to be made active
        SI:EDI -> 32-bit FAR completion procedure
Return: CF clear if successful (scheduled)
        CF set on error
Notes:  this function is only available while MS Windows is running
        the completion procedure is called with CF clear if the specified
          VM has been made active, or with CF set on error
SeeAlso: AX=000Fh,AX=0012h
--------m-2C0012-----------------------------
INT 2C P - Cloaking v1.01 - "Query_Current_VM"
        AX = 0012h
Return: CF clear
        EBX = handle of active VM
        ESI = handle of system VM
        ECX = VM status flags (see #02562)
        EDX = shell flags (see #02563)
Note:   this function is only available while MS Windows is running in enhanced
          mode
SeeAlso: AX=000Fh,AX=0011h,AX=0013h

Bitfields for VM status flags:
Bit(s)  Description     (Table 02562)
 0      in exclusive mode
 1      runs in background
 2      being created
 3      suspended
 4      not executable
 5      executing in protected mode
 6      contains PM application
 7      32-bit PM application
 8      called from VxD
 9      high priority background
 10     blocked on semaphore
 11     awakening
 12     has pageable V86
 13     has locked V86
 14     is scheduled
 15     idle
 16     closing

Bitfields for shell flags:
Bit(s)  Description     (Table 02563)
 2      windowed
 5      Alt-Tab reserved
 6      Alt-Esc reserved
 7      Alt-Space reserved
 8      Alt-PrtSc reserved
 9      Alt-Enter reserved
 10     Alt-PrtSc reserved
 11     PrtSc reserved
 12     polling enabled
 13     no HMA
 14     has shortcut key
 15     locked EMS handles
 16     locked XMS handles
 17     fast paste enabled
 18     locked V86 memory
 30     close-on-exit enabled
--------m-2C0013-----------------------------
INT 2C P - Cloaking v1.01 - "Issue_System_Modal_Message"
        AX = 0013h
        EDX = message box flags (see #02564)
        DS:ECX -> ASCIZ message text
        DS:EDI -> ASCIZ caption
Return: CF clear
        EAX = response code
Note:   this function is only available while MS Windows is running in enhanced
          mode
SeeAlso: AX=000Fh,AX=0012h

Bitfields for message box flags:
Bit(s)  Description     (Table 02564)
 3-0    response codes (see #02565)
 7-4    icon codes
        1 = Warning hand
        2 = exclamation mark
        4 = asterisk
 9-8    default response (0 = first button, 1 = second, 2 = third)
 12     message is system model
 15     don't change focus
 29     hang with interrupts enabled
 30     do not window
 31     execute ASAP

(Table 02565)
Values for response codes:
 00h    OK
 01h    OK, Cancel
 02h    Abort, Retry, Ignore
 03h    Yes, No, Cancel
 04h    Yes, No
 05h    Retry, Cancel
--------m-2C001D-----------------------------
INT 2C P - Cloaking v1.01 - GET INT 2C API HANDLER ENTRY POINT
        AX = 001Dh
Return: CF clear
        DX:EBX = selector:offset of Cloaking host INT 2C handler
Desc:   get the Cloaking host's entry point to bypass any other programs
          which may have hooked INT 2C in protected mode
Note:   the returned entry point must be called with a simulated INT, i.e.
          a PUSHD must precede the far call to the handler
SeeAlso: INT 2F/AX=4310h"Cloaking"
--------m-2C001E-----------------------------
INT 2C P - Cloaking v1.01 - CLEAR CRITICAL SECTION
        AX = 001Eh
Return: CF clear
Desc:   allow MS Windows to switch to another VM after having prevented it
          by invoking a critical section
SeeAlso: AX=001Fh,INT 15/AX=101Ch,INT 2F/AX=1682h
--------m-2C001F-----------------------------
INT 2C P - Cloaking v1.01 - SET CRITICAL SECTION
        AX = 001Fh
Return: CF clear
Desc:   prevent MS Windows from switching to another VM
SeeAlso: AX=001Eh,INT 15/AX=101Bh,INT 2F/AX=1681h
--------m-2C0020-----------------------------
INT 2C P - Cloaking - GET SIZE OF PROTECTED-MODE STATE
        AX = 0020h
Return: EAX = number of bytes required for storing state
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=0021h,AX=0022h
--------m-2C0021-----------------------------
INT 2C P - Cloaking - SAVE PROTECTED-MODE STATE
        AX = 0021h
        ES:EDI -> buffer for protected-mode state
Return: CF clear
        buffer filled
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=0020h,AX=0022h
--------m-2C0022-----------------------------
INT 2C P - Cloaking - RESTORE PROTECTED-MODE STATE
        AX = 0022h
        DS:ESI -> buffer containing previously-saved protected-mode state
Return: CF clear if successful
            state restored
        CF set on error (invalid buffer contents)
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=0020h,AX=0021h
--------m-2C0023-----------------------------
INT 2C P - Cloaking - ISSUE PROTECTED-MODE XMS CALL
        AX = 0023h
Notes:  not currently implemented--NOP in RM386 v6.00
        this function was first introduced with RM386 (RAM-MAN/386) v6.00
--------m-2C0024-----------------------------
INT 2C P - Cloaking - SET V86-MODE STACK
        AX = 0024h
        DX:EBX = new value for V86-mode SS:ESP
Return: nothing
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
--------m-2C0025-----------------------------
INT 2C P - Cloaking - CALL V86-MODE PROCEDURE
        AX = 0025h
        DS:EBX -> client register structure (see #02559)
Return: CF clear if successful
            client register structure updated
        CF set if no more nested procedure call space available
Notes:  this call uses the V86-mode stack supplied in the client structure, and
          calls the routine specified by CS:IP in the client structure
        this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=0026h,AX=0027h,INT 31/AX=0301h
--------m-2C0026-----------------------------
INT 2C P - Cloaking - CALL V86-MODE INTERRUPT HANDLER
        AX = 0026h
        DS:EBX -> client register structure (see #02559)
        CX = interrupt number
Return: CF clear if successful
            client register structure updated
        CF set if no more nested procedure call space available
Notes:  this call uses the V86-mode stack supplied in the client structure
        this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=0025h,AX=0027h,INT 31/AX=0300h
--------m-2C0027-----------------------------
INT 2C P - Cloaking - CHAIN TO V86-MODE INTERRUPT HANDLER
        AX = 0027h
        DS:EBX -> client register structure (see #02559)
Return: CF clear if successful
            client register structure updated
        CF set if no more nested procedure call space available
Notes:  this call uses the V86-mode stack supplied in the client structure,
          and jumps to the address specified by CS:IP in the client structure
        this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=0025h,AX=0026h
--------m-2C0028-----------------------------
INT 2C P - Cloaking - GET ESP0 FROM TSS
        AX = 0028h
Return: CF clear
        EAX = TSS's ESP0
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00, the
          memory manager included in Helix Software's Netroom
--------m-2C0029-----------------------------
INT 2C P - Cloaking - SET SECONDARY STACK
        AX = 0029h
        DX:EBX = new value for SS:ESP of ring 3 secondary stack
Return: CF clear
Desc:   inform RM386 of the ring 3 interrupt stack location
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
--------m-2C002A-----------------------------
INT 2C P - Cloaking - SET 8259 IRQ BASE VECTORS
        AX = 002Ah
        BL = base vector of master interrupt controller
        CL = base vector of slave interrupt controller
Notes:  this call merely informs RM386 that the caller has changed the
          interrupt mappings
        this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: INT 67/AX=DE0Bh
--------m-2C002BCH81-------------------------
INT 2C P - Cloaking - PROTECTED-MODE VIRTUAL DMA SERVICES
        AX = 002Bh
        CH = 81h
        CL = subfunction (02h-0Ch)
        other registers as appropriate for subfunction
Return: varies by function
        CF set on error
Notes:  these functions are equivalent to the INT 4B/AX=81xxh subfunctions
          with the same numbers
        this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: INT 4B/AX=8102h,INT 4B/AX=810Ch
--------m-2C002C-----------------------------
INT 2C P - Cloaking - GET PORT-TRAPPING PASSALONG
        AX = 002Ch
Return: CF clear
        DX:EBX = current I/O trapping passalong address
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=0008h,AX=002Dh
--------m-2C002D-----------------------------
INT 2C P - Cloaking - SET PORT-TRAPPING PASSALONG
        AX = 002Dh
        DX:EBX = new I/O trapping passalong address (see #02566)
Return: CF clear
Notes:  RM386 calls the passalong address whenever an access to a monitored
          I/O port is attempted; the handler should check whether it is a port
          that it is interested in, and if not call the previous passalong
          address (which was retrieved with AX=002Ch before installing the
          new handler)
        this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=0009h,AX=002Ch,INT 67/AX=5DEAh

(Table 02566)
Values Cloaking port-trapping passalong address is called with:
        EAX = CS:IP of faulting instruction (unless executing in protected-mode
                ring 3)
        SS:EBX -> caller register structure (see #02559)
                check EFLAGS V86-mode bit for type
        CX = first two bytes of I/O instruction which was trapped
        DX = port to which I/O is being performed
        CF clear
Return: CF clear if RM386 should perform I/O operation
        CF set if I/O should be skipped
Note:   RM386 skips the trapped I/O instruction, so the passalong handler
          should not modify the client CS:EIP
--------m-2C002E-----------------------------
INT 2C P - Cloaking - TRAP I/O PORT
        AX = 002Eh
        DX = port number to trap
Return: CF clear if successful
        CF set on error (port out of range or reserved)
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=002Fh,AX=0030h
--------m-2C002F-----------------------------
INT 2C PU - Cloaking - UNTRAP I/O PORT
        AX = 002Fh
        DX = port number for which to cancel trapping
Return: CF clear if successful
        CF set on error (port out of range or reserved)
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=002Eh,AX=0030h
--------m-2C0030-----------------------------
INT 2C PU - Cloaking - GET TRAPPING STATE OF SPECIFIED PORT
        AX = 0030h
        DX = port number
Return: CF clear if successful
           BX = current state (0000h not trapped, 0001h trapped)
        CF set on error (port out of range or reserved)
Note:   this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=002Eh,AX=002Fh
--------m-2C0031-----------------------------
INT 2C PU - RM386 v6.00 - BUG
        AX = 0031h
Program: RM386 (RAM-MAN/386) is the memory manager included in Helix
          Software's Netroom
Note:   due to a fencepost error, RM386 v6.00 will branch unpredictably if
          invoked with this function
--------m-2C0031-----------------------------
INT 2C P - Cloaking v1.01 - ALLOCATE V86 CALLBACK
        AX = 0031h
        DX:EBX = CS:EIP of protected-mode routine to be invoked by callback
Return: CF clear if successful
            EBX = CS:IP of V86-mode callback handler
        CF set on error
SeeAlso: AX=0032h
--------m-2C0032-----------------------------
INT 2C P - Cloaking v1.01 - FREE V86 CALLBACK
        AX = 0032h
        EBX = CS:IP of V86-mode callback handler
Return: CF clear if successful
        CF set on error
            AX = error code
                0005h invalid callback address
                0006h callback already free
SeeAlso: AX=0032h
--------m-2C0033-----------------------------
INT 2C P - Cloaking v1.01 - REGISTER CLOAKING CLIENT
        AX = 0033h
        DS:EDX -> client registration structure (see #02567)
Return: CF clear if successful
        CF set on error (linked list corrupt)
SeeAlso: AX=0034h,#02778 at INT 2F/AX=4310h"Cloaking"

Format of client registration structure:
Offset  Size    Description     (Table 02567)
 00h    PWORD   link to next structure
 06h    PWORD   link to previous structure
 0Ch  2 BYTEs   client version (major, minor)
 0Eh 20 BYTEs   client name
 22h    DWORD   physical address of client start
 26h    DWORD   client's total size in bytes
Note:   the link area should not be modified once the structure has been
          used for the registration call
--------m-2C0034-----------------------------
INT 2C P - Cloaking v1.01 - UNREGISTER CLOAKING CLIENT
        AX = 0034h
        DS:EDX -> client registration structure (see #02567)
Return: CF clear if successful
        CF set on error (linked list corrupt)
Note:   the client must unregister before freeing the XMS block containing
          its registration structure(s)
SeeAlso: AX=0033h,#02778 at INT 2F/AX=4310h"Cloaking"
--------D-2D---------------------------------
INT 2D - DOS 2+ - RESERVED
Note:   this vector is not used in DOS versions <= 6.00, and points at an IRET
BUG:    RM386 v6.00-6.02 (as distributed with Helix's Netroom v3.x) contains
          a stack bug in its protected-mode INT 2D handler which causes a crash
          when INT 2D is invoked from V86 mode
--------t-2D---------------------------------
INT 2D - ALTERNATE MULTIPLEX INTERRUPT SPECIFICATION (AMIS) [v3.6]
        AH = multiplex number
        AL = function
            00h installation check
            01h get private entry point
            02h uninstall
            03h request popup
            04h determine chained interrupts
            05h get hotkey list
            06h get device-driver information
            07h-0Fh reserved for future enhancements
                Return: AL = 00h (not implemented)
            other  application-dependent
        other registers vary by function (also see individual entries below)
Return: varies by function
Notes:  programs should not use fixed multiplex numbers; rather, a program
          should scan all multiplex numbers from 00h to FFh, remembering the
          first unused multiplex in case the program is not yet installed.
          For multiplex numbers which are in use, the program should compare
          the first 16 bytes of the signature string to determine whether it
          is already installed on that multiplex number.  If not previously
          installed, it should use the first free multiplex number.
        functions other than 00h are not valid unless a program is installed
          on the selected multiplex number
        to be considered fully compliant with version 3.6 of the specification,
          programs must implement at least functions 00h, 02h (no resident
          uninstall code required), and 04h (return value 04h).  TSRs that
          provide hotkeys with which the user can activate them must also
          implement function 05h.  TSRs which provide DOS device drivers must
          also implement function 06h.  The absolute minimum fully-compliant
          implementation has an overhead of 64 bytes (80 bytes with function
          05h) plus 22 bytes per hooked interrupt (for the interrupt sharing
          protocol header and hook list entry).
        the signature string and description may be used by memory mappers
          to display the installed programs
        to be considered fully compliant, users of this specification must
          adhere to the IBM interrupt sharing protocol (see #02568), which will
          permit removal of TSRs in arbitrary order and interrupt handler
          reordering.  All TSRs following this specification should be
          removable unless they are loaded from CONFIG.SYS, though they need
          not keep the code for removing themselves resident; it is acceptable
          for a separate program to perform the interrupt unhooking and
          memory-freeing steps of removal.
        A sample public-domain implementation including example TSRs and
          utility programs may be found in a separate package distributed as
          AMISLnnn.ZIP (AMISL092.ZIP as of this writing).
        Please let me know if you choose to follow this proposal.  The
          signature and a list of the private API calls you use would be
          appreciated, as well.
SeeAlso: INT 2D/AL=00h,INT 2D/AL=01h,INT 2D/AL=02h,INT 2D/AL=03h,INT 2D/AL=04h
SeeAlso: INT 2D/AL=05h,INT 2D/AL=06h,INT 2F"NOTES"

Format of interrupt sharing protocol interrupt handler entry point:
Offset  Size    Description     (Table 02568)
 00h  2 BYTEs   short jump to actual start of interrupt handler, immediately
                  following this data block (EBh 10h)
 02h    DWORD   address of next handler in chain
 06h    WORD    signature 424Bh
 08h    BYTE    EOI flag
                00h software interrupt or secondary hardware interrupt handler
                80h primary hardware interrupt handler (will issue EOI)
 09h  2 BYTEs   short jump to hardware reset routine
                must point at a valid FAR procedure (may be just RETF)
 0Bh  7 BYTEs   reserved (0) by IBM for future expansion
Note:   when chaining to the prior handler, the interrupt handler must perform
          an indirect jump/call using the address at offset 02h in the
          ISP header.  This permits another AMIS TSR to hook itself into
          the chain at a position other than as the first handler to receive
          an interrupt.
SeeAlso: INT F1/AH=01h"Common ISDN API",INT F1/AH=06h"CAPI",#04068
--------t-2D--00-----------------------------
INT 2D - AMIS v3.0+ - INSTALLATION CHECK
        AL = 00h
        AH = multiplex number for program
Return: AL = 00h if free
        AL = FFh if multiplex number in use
            CX = binary version number (CH = major, CL = minor)
            DX:DI -> signature string (see #02569) identifying the program
                  using the multiplex number
SeeAlso: INT 2D/AL=01h,INT 2D/AL=02h,INT 2D/AL=03h,INT 2D/AL=04h,INT 2D/AL=05h
SeeAlso: INT 2D/AL=06h
Index:  installation check;Alternate Multiplex Interrupt Specification
Index:  installation check;AMIS|installation check;FASTMOUS
Index:  installation check;SPELLER|installation check;Monitor
Index:  installation check;NOLPT|installation check;NOTE
Index:  installation check;RBkeyswp|installation check;SWITCHAR
Index:  installation check;VGABLANK|installation check;EATMEM
Index:  installation check;RECALL|installation check;XPTR2

Format of AMIS signature string:
Offset  Size    Description     (Table 02569)
 00h  8 BYTEs   blank-padded manufacturer's name (possibly abbreviated)
 08h  8 BYTEs   blank-padded product name
 10h 64 BYTEs   ASCIZ product description (optional, may be a single 00h)
Note:   it is not necessary to reserve a full 64 bytes for the description,
          just enough to store the actual ASCIZ string
SeeAlso: #02570

(Table 02570)
Values for AMIS signatures known to be in use:
 'Byrial J' 'EKLAVO  '  permits keyboard entry of Esperanto accented letters
 'CoveSoft' 'Burnout+'  shareware screen saver Burnout Plus
 'Crynwr  ' 'SPELLER '  TSR spelling-checker
 'CPH1995 ' 'CDTSR   '  resident CD-Audio player
 'CPH1996 ' 'DSAPI   '
 'CSJewell' 'Modula3L'  Curtis Jewell's Modula-3 compiler (non-TSR)
 'DAISYCHA' 'INDRIVER'  Advanced Parallel Port daisy chain driver (vendor name
                          in product description field, if desired)
                        (see also INT 2D/AL=DCh)
 'DTown SD' 'DTU     '  DTown Software Development's DTown Utilities
                        (see also INT 2D/AL=20h)
 'ECLIPSE ' 'PLUMP   '  Eclipse Software's printer and plotter spooler
 'GraySoft' 'GIPC    '  GraySoft's Inter-Process Communications driver
 'heathh  ' 'Monitor '
 'Helge O '             TSRs by Helge Olav Helgesen
 'J. Berry' 'RATSR   '  RemoteAccess Network Manager workstation module
 'JWB     ' 'RAMLIGHT'  James Birdsall's on-screen RAMdisk activity indicator
 'M Better' 'iHPFS   '  Marcus Better's HPFS filesystem driver for DOS
 'M. Paul ' 'FREEVER '  DOS version-faking TSR by Matthias Paul
 'Nildram ' 'ST      '  Screen Thief graphics screen grabber
 'Pino Nav' 'ALTMENU '  activate any program's menu bar by pressing Alt key
 'Pino Nav' 'Keybit  '  Pino Navato's KEYBIT Lite Italian keyboard driver v4+
 'PowrQuot' 'CAPRILOG'
 'PowrQuot' 'CAPRITSR'
 'PowrQuot' 'CAPRIWIN'
 'R-Ware  ' 'dLite   '  run-time data decompression TSR
 'Ralf B  ' 'disaXXYY'  RBdisabl -- disable key scancode XX w/ shift states YY
 'Ralf B  ' 'DUALVGA '  dual-VGA support, screen blanker, and DPMS driver
 'Ralf B  ' 'FASTMOUS'  example TSR included with sample AMIS library code
 'Ralf B  ' 'NoBreak '  disable Ctrl-@, Ctrl-C, and Ctrl-Break keys
 'Ralf B  ' 'NOLPT n '  example TSR -- turn LPTn into bit-bucket
 'Ralf B  ' 'NOTE    '  example TSR -- popup note-taker
 'Ralf B  ' 'RBclock '  RBclock -- on-screen real-time clock
 'Ralf B  ' 'RBclockE'  RBclock -- on-screen elapsed-time clock
 'Ralf B  ' 'RBdvorak'  Dvorak keyboard mapping w/ opt Esc/~, LCtrl/CapsLk swap
 'Ralf B  ' 'RBkcount'  display count of keystrokes on screen
 'Ralf B  ' 'RBkeyswp'  RBkeyswap v3.0+ -- swap Esc/~ and LCtrl/CapsLock keys
 'Ralf B  ' 'RBnoboot'  disable Ctrl-Alt-Del key combination
 'Ralf B  ' 'ShftCaps'  require Shift-CapsLock to turn on CapsLock
 'Ralf B  ' 'ShftNumL'  require Shift-NumLock to turn off NumLock
 'Ralf B  ' 'SWITCHAR'  example TSR -- add switchar() support removed from DOS5
 'Ralf B  ' 'VGABLANK'  VGA-only screen blanker
 'Ralf B  ' 'WINTAME '  yield CPU when program in Win95 DOS box is idle
 'Sally IS' 'Mdisk   '  removeable, resizeable RAMdisk
 'Sally IS' 'Scr2Tex '  screen dumper with output in (La)Tex format
 'SRT     ' 'STOPBOOT'  reboot preventer by Steve Talbot
 'Thaco   ' 'NEST    '  Eirik Pedersen's programmer's delimiter matcher
 'TifaWARE' 'EATMEM  '  George A. Theall's public domain memory restrictor for
                        testing programs (v1.1+)
 'TifaWARE' 'RECALL  '  public domain commandline editor and history (v1.2+)
 'Todd    ' 'XPTR2   '  PC-to-Transputer interface by Todd Radel
 'WlkngOwl' 'NoiseSYS'  NOISE.SYS random-number generator
SeeAlso: #02569
--------t-2D--01-----------------------------
INT 2D - AMIS v3.0+ - GET PRIVATE ENTRY POINT
        AL = 01h
        AH = multiplex number for program
Return: AL = 00h if all API calls via INT 2D
        AL = FFh if entry point supported
            DX:BX -> entry point for bypassing interrupt chain
Note:   this function is not valid unless a program is installed on the
          specified multiplex number; use INT 2D/AL=00h to check
SeeAlso: INT 2D/AL=00h,INT 2D/AL=02h,INT 2D/AL=03h,INT 2D/AL=04h,INT 2D/AL=05h
SeeAlso: INT 2D/AL=06h
Index:  entry point;Alternate Multiplex Interrupt|entry point;AMIS
--------t-2D--02-----------------------------
INT 2D - AMIS v3.0+ - UNINSTALL
        AL = 02h
        AH = multiplex number for program
        DX:BX = return address for successful uninstall (may be ignored by TSR)
Return: AL = status
            00h not implemented (makes TSR non-compliant with specification)
            01h unsuccessful
            02h can not uninstall yet, will do so when able
            03h safe to remove, but no resident uninstaller
                  (TSR still enabled)
                BX = segment of memory block with resident code
            04h safe to remove, but no resident uninstaller
                  (TSR now disabled)
                BX = segment of memory block with resident code
            05h not safe to remove now, try again later
            06h disabled, but can not be removed from memory
                  because loaded from CONFIG.SYS
            07h safe to remove, but no resident device-driver
                  uninstaller.  Caller must unlink device
                  drivers from DOS device chain as well as
                  unhooking interrupts and freeing memory
                BX = segment of memory block with resident code
            FFh successful
        return at DX:BX with AX destroyed if successful and TSR honors
          specific return address
Note:   this function is not valid unless a program is installed on the
          specified multiplex number; use INT 2D/AL=00h to check
SeeAlso: INT 2D/AL=00h,INT 2D/AL=01h,INT 2D/AL=03h,INT 2D/AL=04h,INT 2D/AL=05h
SeeAlso: INT 2D/AL=06h
Index:  uninstall;Alternate Multiplex Interrupt Specification|uninstall;AMIS
--------t-2D--03-----------------------------
INT 2D - AMIS v3.0+ - REQUEST POP-UP
        AL = 03h
        AH = multiplex number for program
Return: AL = status
            00h not implemented or TSR is not a pop-up
            01h can not pop up at this time, try again later
            02h can not pop up yet, will do so when able
            03h already popped up
            04h unable to pop up, user intervention required
                BX = standard reason code
                    0000h unknown failure
                    0001h interrupt chain passes through memory
                          which must be swapped out to pop up
                    0002h swap-in failed
                CX = application's reason code if nonzero
            FFh TSR popped up and was exited by user
                BX = return value
                    0000h no return value
                    0001h TSR unloaded
                    0002h-00FFh reserved
                    0100h-FFFFh application-dependent
Note:   this function is not valid unless a program is installed on the
          specified multiplex number; use INT 2D/AL=00h to check
SeeAlso: INT 2D/AL=00h,INT 2D/AL=01h,INT 2D/AL=02h,INT 2D/AL=04h,INT 2D/AL=05h
SeeAlso: INT 2D/AL=06h
--------t-2D--04-----------------------------
INT 2D - AMIS v3.0+ - DETERMINE CHAINED INTERRUPTS
        AL = 04h
        AH = multiplex number for program
        BL = interrupt number (except 2Dh)
Return: AL = status
            00h not implemented (makes TSR non-compliant with specification)
            01h (obsolete) unable to determine
            02h (obsolete) interrupt hooked
            03h (obsolete) interrupt hooked, address returned
                DX:BX -> TSR's interrupt BL handler
            04h list of hooked interrupts returned
                DX:BX -> interrupt hook list (see #02571)
            FFh interrupt not hooked
Notes:  BL is ignored if the TSR returns AL=04h; in that case, the caller
          needs to scan the return list rather than making additional calls
          to this function.  If the return is not 00h or 04h, then the caller
          must cycle through the remaining interrupt numbers it wishes to
          check.
        return values 01h through 03h may not be used by AMIS v3.6-compliant
          programs; they are included here solely for compatibility with
          version 3.3, though they were probably never used in any
          implementation
        for return values 01h through 03h, since INT 2D is known to be hooked,
          the resident code need not test for BL=2Dh (to minimize its size),
          and the return value is therefore undefined in that case.
        this function is not valid unless a program is installed on the
          specified multiplex number; use INT 2D/AL=00h to check
SeeAlso: INT 2D/AL=00h,INT 2D/AL=01h,INT 2D/AL=02h,INT 2D/AL=03h,INT 2D/AL=05h
SeeAlso: INT 2D/AL=06h

Format of AMIS interrupt hook list [array]:
Offset  Size    Description     (Table 02571)
 00h    BYTE    interrupt number (last entry in array is 2Dh)
 01h    WORD    offset within hook list's segment of the interrupt handler
                this will point at the initial short jump of the interrupt
                  sharing protocol header (see #02568)
SeeAlso: #02572
--------t-2D--05-----------------------------
INT 2D - AMIS v3.5+ - GET HOTKEYS
        AL = 05h
        AH = multiplex number for program
Return: AL = status
            00h not implemented
            FFh supported
                DX:BX -> hotkey list (see #02572)
Notes:  this function is not valid unless a program is installed on the
          specified multiplex number; use INT 2D/AL=00h to check
        programs which provide hotkeys are required to provide this function
          to be fully compliant with this specification
SeeAlso: INT 2D/AL=00h,INT 2D/AL=01h,INT 2D/AL=02h,INT 2D/AL=03h,INT 2D/AL=04h
SeeAlso: INT 2D/AL=06h

Format of AMIS hotkey list:
Offset  Size    Description     (Table 02572)
 00h    BYTE    type of hotkey checking (see #02573)
 01h    BYTE    number of hotkeys (may be zero if TSR can disable hotkeys)
 02h 6N BYTEs   array of hotkey definitions
                (one per hotkey, first should be primary hotkey)
                Offset  Size    Description
                 00h    BYTE    hotkey scan code (00h/80h if shift states only)
                                hotkey triggers on release if bit 7 set
                 01h    WORD    required shift states (see #02574)
                 03h    WORD    disallowed shift states (see #02574)
                 05h    BYTE    hotkey flags (see #02575)
Notes:  except for bit 7, the shift states correspond exactly to the return
          values from INT 16/AH=12h.  A set bit in the required states word
          indicates that the corresponding shift state must be active when the
          hotkey's scan code is received for the hotkey to be recognized; a
          clear bit means that the corresponding state may be ignored.  A set
          bit in the disallowed shift states word indicates that the
          corresponding shift state must be inactive.
        for the disallowed-states word, if one of the "either" bits is set,
          then both the corresponding left bit and right bit must be set
        examples:
                Ctrl-Alt-Del monitoring: 53h 000Ch 0003h 06h
                Alt-key tap (DESQview):  B8h 0000h 0007h 08h
                Shf-Shf-N (NOTE.COM):    31h 0003h 000Ch 00h
Index:  hotkeys;AMIS
SeeAlso: #00006

Bitfields for type of AMIS hotkey checking:
Bit(s)  Description     (Table 02573)
 0      checks before chaining INT 09
 1      checks after chaining INT 09
 2      checks before chaining INT 15/AH=4Fh
 3      checks after chaining INT 15/AH=4Fh
 4      checks on INT 16/AH=00h,01h,02h
 5      checks on INT 16/AH=10h,11h,12h
 6      checks on INT 16/AH=20h,21h,22h
 7      reserved (0)
SeeAlso: #02572

Bitfields for AMIS shift states:
Bit(s)  Description     (Table 02574)
 0      right shift pressed
 1      left shift pressed
 2      either control key pressed
 3      either Alt key pressed
 4      ScrollLock active
 5      NumLock active
 6      CapsLock active
 7      either shift key pressed
 8      left control key pressed
 9      left Alt key pressed
 10     right control key pressed
 11     right Alt key pressed
 12     ScrollLock pressed
 13     NumLock pressed
 14     CapsLock pressed
 15     SysReq key pressed
Notes:  if bit 2 is set, either control key may be pressed for the hotkey; if
          bits 8 and 10 are both set, then both control keys must be pressed.
          Similarly for bits 3 and 9/11, as well as 7 and 0/1.
        the SysReq key is often labeled SysRq
SeeAlso: #02572,#02575

Bitfields for AMIS hotkey flags:
Bit(s)  Description     (Table 02575)
 0      hotkey chained before processing
 1      hotkey chained after processing
 2      others should pass through this hotkey so that it can be monitored
 3      hotkey will not activate if other keys pressed/released before hotkey
          press is completed
 4      this key is remapped into some other key
 5      this key is conditionally chained (sometimes passed on, sometimes
          swallowed)
 6-7    reserved (0)
SeeAlso: #02572,#02574
--------t-2D--06-----------------------------
INT 2D - AMIS v3.6 - GET DEVICE-DRIVER INFORMATION
        AL = 06h
        AH = multiplex number for program
Return: AL = number of device driver headers supplied by prog.
        AH = device-driver flags (see #02576)
        DX:BX -> first device driver header (see #01646)
Program: AMIS is the Alternate Multiplex Interrupt Specification promulgated
          by Ralf Brown
Notes:  if AL=00h, AH,BX,DX are meaningless and may be destroyed
        this function is not valid unless a program is installed on the
          specified multiplex number; use INT 2D/AL=00h to check
        programs which provide device drivers are required to support this
          function to be considered fully compliant with v3.6+ of the
          specification
SeeAlso: INT 2D/AL=00h,INT 2D/AL=01h,INT 2D/AL=02h,INT 2D/AL=03h,INT 2D/AL=04h
SeeAlso: INT 2D/AL=05h

Bitfields for AMIS device-driver information flags:
Bit(s)  Description     (Table 02576)
 0      program loaded from CONFIG.SYS, and thus can not be removed from memory
        (leave clear if unable to determine)
 1      device driver headers have not been linked into DOS device chain
 2      reentrant device driver(s)
--------N-2D--10-----------------------------
INT 2D - RATSR 2.0+ - GET STATUS
        AL = 10h
        AH = AMIS multiplex number for RATSR
Return: AL = status
            01h listening (no connection)
            02h receiving             \
            03h sending                > station being monitored
            04h initializing receive  /
        AH = keyboard lock status (00h unlocked, 01h locked)
Program: RATSR is a utility by James Berry provided with
          RemoteAccess/Professional, a commercial bulletin board system, that
          allows remote control of a station over a network
SeeAlso: INT 2D"AMIS"
--------d-2D--10-----------------------------
INT 2D - dLite 1.0+ - GET PARAMETER BLOCK ADDRESS
        AL = 10h
        AH = AMIS multiplex number for dLite
Return: CF clear if successful
            ES:BX -> parameter block (see #02577)
        CF set on error
Program: dLite is a shareware TSR by Rainer Schuetze which transparently
          expands compressed files when they are read
SeeAlso: AL=11h"dLite",AL=12h"dLite",INT 21/AX=FEDCh"PCMANAGE"

Format of dLite parameter block:
Offset  Size    Description     (Table 02577)
 00h    BYTE    TSR flags (see #02578)
 01h    WORD    maximum number of programs needing original filesize
 03h    WORD    current number of programs needing original filesize
 05h    WORD    maximum number of files that can be handled by dLite (should
                  be the same as FILES= in CONFIG.SYS)
 07h    WORD    offset (in the same segment as the parameter block) of the
                  table of programs needing the original filesize (8 bytes
                  each, without path or extension, uppercase, and zero \
                  terminated if shorter than 8 bytes)

Bitfields for dLite TSR flags:
Bit(s)  Description     (Table 02578)
 0      deny FCB access
 1      dLite sleeping rather than activated
 2      always indicate original filesize when reading directory entries,
          rather than only for specified programs
 3-7    reserved
SeeAlso: #02577
--------V-2D--10-----------------------------
INT 2D - Burnout Plus v3.00 - GET STATE/CONTROL INFORMATION
        AL = 10h
        AH = AMIS multiplex number for Burnout Plus
Return: AL = 01h
        BX = Burnout Plus status (see #02579)
        CX = record of features loaded (see #02580)
        ES:DI -> Burnout Plus control structure (see #02581)
Program: Burnout Plus is a DOS screen saver from Cove Software
SeeAlso: INT 14/AX=AA01h,INT 2D"AMIS"
Index:  screen saver;Burnout Plus

Bitfields for Burnout Plus status:
Bit(s)  Description     (Table 02579)
 0      screen is blanked
 1      MS Windows is active (Burnout Plus deactivated)
 2-15   reserved

Bitfields for Burnout Plus features loaded/features enabled:
Bit(s)  Description     (Table 02580)
 0      mouse activity monitor
 1      passkey support
 2      password support
 3      continuous clear
 4      software blanking
 5      video activity monitor
 6      disk activity monitor
 7      activating keystroke suppression
SeeAlso: #02581

Format of Burnout Plus control structure:
Offset  Size    Description     (Table 02581)
 00h    BYTE    size of structure in bytes
 01h    WORD    Burnout Plus version
 03h    WORD    screen blanking reset count in clock ticks
 05h    WORD    current countdown value in clock ticks
 07h    BYTE    type of timeout specification
 08h    BYTE    instant-blank hotkey
 09h    WORD    extended status information (see #02582)
                the bits for password, passkey, and software blanking are
                  ignored and cannot be enabled or disabled externally
 0Bh    WORD    features enabled (see #02580)
Note:   all fields except the first two may be modified by external programs
          to affect the operation of Burnout Plus
Index:  hotkeys;Burnout Plus

Bitfields for extended Burnout Plus status information:
Bit(s)  Description     (Table 02582)
 0      Burnout Plus disabled
 1      force screen to blank on next clock tick
 2      restore screen if currently blanked
 3-15   reserved
Note:   1 and 2 are automatically cleared by Burnout Plus after blanking
          or restoring the screen
SeeAlso: #02581
--------V-2D--10-----------------------------
INT 2D U - Screen Thief v1.00 - FREE HIGH MEMORY BUFFERS
        AL = 10h
        AH = AMIS multiplex number for Screen Thief
Return: nothing
Program: Screen Thief is a graphics screen grabber
Note:   releases any code and data stored in EMS, DOS UMBs, or XMS UMBs, but
          does not release the low-memory stub; this may be used to effect a
          partial uninstall if INT 2D/AL=02h fails
SeeAlso: INT D8"Screen Thief"
--------i-2D--10-----------------------------
INT 2D U - RAMLIGHT v1.0 - GET MONITORING INFORMATION
        AL = 10h
        AH = AMIS multiplex number for RAMLIGHT
Return: ES:BX -> array of fake device driver headers used in monitoring
        CX = number of drives being monitored???
--------U-2D--10-----------------------------
INT 2D - DTown Utilities v1.40+ - EXTENDED API INSTALLATION CHECK
        AL = 10h
Return: AL = FFh
        BL = extended API availability (00h no, 01h API is loaded)
SeeAlso: INT 2D/AL=11h"DTown",INT 2D/AL=20h,INT 2D/AL=50h
--------s-2D--10-----------------------------
INT 2D - CDTSR - GET INTERNAL VARIABLE TABLE
        AL = 10h
        AH = AMIS multiplex number for CDTSR
Return: CX:DX -> CDTSR internal variable structure (see #02583)
Program: CDTSR is a resident audio CD player by Colin Hill
SeeAlso: INT 2D/AL=11h"CDTSR",INT 2D/AL=12h"CDTSR",INT 2D/AL=13h"CDTSR"

Format of CDTSR internal variable structure:
Offset  Size    Description     (Table 02583)
 00h    BYTE    hotkey scan code (see #00006)
 01h    BYTE    hotkey shift states
 02h    BYTE    flag: repeat
 03h    BYTE    flag: custom repeat
 04h    BYTE    flag: background polling
 05h    DWORD   (read-only) internal timing variable
 09h    DWORD   current track play position, in frames
 0Dh    DWORD   current disk play position, in frames
 11h    BYTE    number of entries in track program
 12h    BYTE    index into track program currently playing (FFh if not playing)
 13h 100 BYTEs  track program (each byte contains one track number)
 77h    BYTE    saved cursor end scan line
 78h    BYTE    saved cursor start scan line
 79h    BYTE    currently playing track
 7Ah    BYTE    CD driver media-change flag
 7Bh    WORD    video base segment during last popup
 7Dh    WORD    video page offset during last popup
 7Fh    BYTE    currently-selected track
 80h    DWORD   begin of custom repeat, in frames
 84h    DWORD   end of custom repeat, in frames
 88h    WORD    track program index of top list item
--------K-2D--10-----------------------------
INT 2D - KEYBIT Lite v5+ - GET POINTER TO STATUS BYTE
        AL = 10h
        AH = AMIS multiplex number for KEYBIT Lite
Return: DX:BX -> status byte (see #02584)
Program: KEYBIT Lite is an enhanced Italian keyboard driver by Pino Navato.
SeeAlso: INT 2D"AMIS"

Bitfields for KEYBIT Lite status byte:
Bit(s)  Description     (Table 02584)
 7      KEYBIT Lite active
 6      E-mail support active
 5-0    reserved
Notes:  E-mail support is one of the original features of KEYBIT Lite.  It is
          the automatic conversion of the 8-bits ASCII chars produced by some
          keys available on Italian keyboards to couples of 7-bits chars.
        Message editors should always enable e-mail support, they should also
          restore its original status before exiting.
        The user can change both status bits by hotkeys.
--------K-2D--10-----------------------------
INT 2D - ALTMENU - GET POINTER TO KEY CODE
        AL = 10h
        AH = AMIS multiplex number for signature 'Pino Nav' 'ALTMENU '
Return: DX:BX -> WORD key code to insert in keyboard buffer on Alt-key tap
Program: Pino Navato's freeware ALTMENU permits activating the menu bar of
          any program by pressing the Alt key alone.
Notes:  The value in the key code word will be returned in AX by a call to
          INT 16/AH=00h after the Alt key is pressed by itself
        ALTMENU may be disabled by setting the key code equal to 0000h
SeeAlso: INT 16/AH=00h,INT 2D"AMIS"
--------d-2D--11-----------------------------
INT 2D - dLite 1.0+ - CHECK FOR dPressed FILE AND GET ORIGINAL SIZE
        AL = 11h
        AH = AMIS multiplex number for dLite
        BX = file handle
Return: CF clear if successful
            DX:AX = size of uncompressed file
        CF set on error (not dPressed file)
SeeAlso: AL=10h"dLite",AL=12h"dLite"
--------U-2D--11-----------------------------
INT 2D - DTown Utilities v1.40+ - UTILITY INSTALLATION CHECK
        AL = 11h
        BL = function
            00h get number of installed utilities
                Return: BL = number of utilities
            01h get installed utilities
                DX:DI -> buffer containing one byte for each utility
                Return: DX:DI buffer filled with flags (0=no,1=yes) indicating
                          whether the corresponding utility is loaded
Return: AL = FFh if supported
Note:   this function is only available if the extended API has been installed
          in the resident portion
SeeAlso: INT 2D/AL=10h"DTown",INT 2D/AL=20h
--------s-2D--11-----------------------------
INT 2D - CDTSR - REPROGRAM CDTSR
        AL = 11h
        AH = AMIS multiplex number for CDTSR
Return: nothing
Program: CDTSR is a resident audio CD player by Colin Hill
Desc:   reprograms CDTSR based on the values in the internal variable
          structure (see #02583), which may have been changed by an application
SeeAlso: INT 2D/AL=10h"CDTSR",INT 2D/AL=12h"CDTSR",INT 2D/AL=13h"CDTSR"
--------d-2D--12-----------------------------
INT 2D - dLite 1.0+ - CHECK FOR dPressed FILE AND GET COMPRESSED SIZE
        AL = 12h
        AH = AMIS multiplex number for dLite
        BX = file handle
Return: CF clear if successful
            DX:AX = size of compressed file
        CF set on error (not dPressed file)
SeeAlso: AL=10h"dLite",AL=11h"dLite"
--------s-2D--12-----------------------------
INT 2D - CDTSR - DISABLE POPUP
        AL = 12h
        AH = AMIS multiplex number for CDTSR
Return: nothing
SeeAlso: INT 2D/AL=10h"CDTSR",INT 2D/AL=11h"CDTSR",INT 2D/AL=13h"CDTSR"
--------U-2D--12-----------------------------
INT 2D - FREEVER - GET ORIGINAL DOS VERSION INFO
        AL = 12h
        AH = AMIS multiplex number for FREEVER
Return: AL = FFh if successful
            BH = major DOS version
            BL = minor DOS version
            CH = DOS version flag
            CL = OEM number
            DH = major DR DOS version number (FFh if unknown)
            DL = minor DR DOS version number (FFh if unknown)
Program: FREEVER is an AMIS-conformant freeware DOS version-faking TSR similar
          to SETVER for any DOS-compatible OS, written by Matthias Paul
SeeAlso: INT 2D/AL=13h"FREEVER",INT 2D/AL=14h"FREEVER",INT 2D/AL=17h"FREEVER"
--------s-2D--13-----------------------------
INT 2D - CDTSR - ENABLE POPUP
        AL = 13h
        AH = AMIS multiplex number for CDTSR
Return: nothing
Program: CDTSR is a resident audio CD player by Colin Hill
SeeAlso: INT 2D/AL=10h"CDTSR",INT 2D/AL=11h"CDTSR",INT 2D/AL=12h"CDTSR"
--------U-2D--13-----------------------------
INT 2D - FREEVER - SET VERSION NUMBERS
        AL = 13h
        AH = AMIS multiplex number for FREEVER
        BH = new major DOS version
        BL = new minor DOS version
        CH = new DOS version flag
        CL = new DOS revision number
        DH = new OEM number
SeeAlso: INT 2D/AL=12h"FREEVER",INT 2D/AL=15h"FREEVER",INT 2D/AL=17h"FREEVER"
--------U-2D--14-----------------------------
INT 2D - FREEVER - ENABLE TSR
        AL = 14h
        AH = AMIS multiplex number for FREEVER
Return: AL = FFh if successful
SeeAlso: INT 2D/AL=12h"FREEVER",INT 2D/AL=15h"FREEVER",INT 2D/AL=16h"FREEVER"
--------U-2D--15-----------------------------
INT 2D - FREEVER - DISABLE TSR
        AL = 15h
        AH = AMIS multiplex number for FREEVER
Return: AL = FFh if successful
SeeAlso: INT 2D/AL=12h"FREEVER",INT 2D/AL=14h"FREEVER",INT 2D/AL=16h"FREEVER"
--------U-2D--16-----------------------------
INT 2D - FREEVER - GET TSR STATUS
        AL = 16h
        AH = AMIS multiplex number for FREEVER
Return: AL = FFh if successful
            BL = status
                01h resident and active
                02h resident and inactive
SeeAlso: INT 2D/AL=12h"FREEVER",INT 2D/AL=15h"FREEVER",INT 2D/AL=17h"FREEVER"
--------U-2D--17-----------------------------
INT 2D - FREEVER - GET TaskMAX STATUS AT INSTALLATION
        AL = 17h
        AH = AMIS multiplex number for FREEVER
Return: AL = FFh if successful
            BL = status
                00h if TaskMAX not loaded before SETDRVER
                FFh if TaskMAX was loaded before SETDRVER
Program: FREEVER is an AMIS-conformant freeware DOS version-faking TSR similar
          to SETVER for any DOS-compatible OS, written by Matthias Paul
SeeAlso: INT 2D/AL=12h"FREEVER",INT 2D/AL=14h"FREEVER",INT 2D/AL=16h"FREEVER"
--------U-2D--20-----------------------------
INT 2D - DTown Utilities v1.40+ - GET POP-UP HANDLER ADDRESS
        AL = 20h
Return: AL = FFh if available
            DX:DI -> DTU popup-handler
Program: DTown Utilities is a freeware programmer's utility TSR by Jeroen van
          Disseldorp
Note:   this function is only available if the extended API has been installed
          in the resident portion
SeeAlso: INT 2D/AL=10h"DTown",INT 2D/AL=21h,INT 2D/AL=50h,INT 2D/AL=51h
SeeAlso: INT 03"DTown"
--------U-2D--21-----------------------------
INT 2D - DTown Utilities v1.40+ - POP UP
        AL = 21h
        BL = which utility to bring up
            00h active utility
            01h help screen
            0Ah ASCII table
            0Bh memory view
            0Ch CPU status
            0Dh calculator
            0Eh miscellaneous
            0Fh file viewer
            10h disassembler
Return: AL = status
            00h already active
            FFh popped up successfully
        BX = 0000h
Note:   this function is only available if the extended API has been installed
          in the resident portion
SeeAlso: INT 2D/AL=10h"DTown",INT 2D/AL=20h,INT 2D/AL=50h
--------U-2D--50-----------------------------
INT 2D - DTown Utilities v1.40+ - MEMORY VIEW SET ADDRESS
        AL = 50h
        CX:DX = new address for start of memory view utility's display
Note:   this function is only available if the extended API has been installed
          in the resident portion
Return: AL = FFh if supported
SeeAlso: INT 2D/AL=10h"DTown",INT 2D/AL=20h,INT 2D/AL=21h,INT 2D/AL=51h
--------U-2D--51-----------------------------
INT 2D - DTown Utilities v1.40+ - MEMORY VIEW SET REFERENCE
        AL = 51h
        BL = reference ("bookmark") number
        CX:DX = new address for reference
Return: AL = status
            00h invalid index
            FFh reference set
Note:   this function is only available if the extended API has been installed
          in the resident portion
Program: DTown Utilities is a shareware programmer's utility TSR by Jeroen van
          Disseldorp
SeeAlso: INT 2D/AL=10h"DTown",INT 2D/AL=20h,INT 2D/AL=50h
--------b-2D--DC-----------------------------
INT 2D C - DAISY.SYS - BROADCAST: CHAIN RESCANNED
        AL = DCh
        AH = AMIS multiplex number for signature 'DAISYCHA' 'INDRIVER'
        DL = LPT Port Rescanned
Program: DAISY.SYS is a daisy chain manager for parallel port peripherals
          conforming to the IEEE 1284.3 Committee's daisy chain specification.
Desc:   This Broadcast is sent whenever daisy chain IDs are reassigned to
          warn parallel port device drivers that their daisy chain ID may
          have been changed.
Note:   This function is a callout from DAISY.SYS, NOT a call into DAISY.SYS
SeeAlso: INT 17/AX=0200h"Enhanced Parallel Port",#00633,#02570
--------l-2E---------------------------------
INT 2E U - DOS 2+ - PASS COMMAND TO COMMAND INTERPRETER FOR EXECUTION
        DS:SI -> commandline to execute (see #02585)
Return: all registers except CS:IP destroyed
        AX = status (4DOS v4.0)
           0000h successful
           FFFFh error before processing command (not enough memory, etc)
           other error number returned by command
Notes:  this call allows execution of arbitrary commands (including COMMAND.COM
          internal commands) without loading another copy of COMMAND.COM
        if COMMAND.COM is the user's command interpreter, the primary copy
          executes the command; this allows the master environment to be
          modified by issuing a "SET" command, but changes in the master
          environment will not become effective until all programs descended
          from the primary COMMAND.COM terminate
        since COMMAND.COM processes the string as if typed from the keyboard,
          the transient portion needs to be present, and the calling program
          must ensure that sufficient memory to load the transient portion can
          be allocated by DOS if necessary
        results are unpredictable if invoked by a program run from a batch file
          because this call is not reentrant and COMMAND.COM uses the same
          internal variables when processing a batch file
        hooked but ignored by 4DOS v3.0 COMMAND.COM replacement unless SHELL2E
          has been loaded
        the MS-DOS 5 Programmer's Reference calls this "Reload Transient"

Format of DOS commandline:
Offset  Size    Description     (Table 02585)
 00h    BYTE    length of command string, not counting trailing CR
 01h    var     command string
  N     BYTE    0Dh (CR)
--------O-2E---------------------------------
INT 2E UP - Windows NT - NATIVE API
        EAX = function number (see #02586)
        EDX = address of parameter block
Return: ???

(Table 02586)
Values for Windows NT NTOS function number:
 000h   AcceptConnectPort       (24 bytes of parameters)
 001h   AccessCheck             (32 bytes of parameters)
 002h   AccessCheckAndAuditAlarm        (44 bytes of parameters)
 003h   AddAtom                 (8 bytes of parameters)
 004h   AdjustGroupsToken       (24 bytes of parameters)
 005h   AdjustPrivilegesToken   (24 bytes of parameters)
 006h   AlertResumeThread       (8 bytes of parameters)
 007h   AlertThread             (4 bytes of parameters)
 008h   AllocateLocallyUniqueId (4 bytes of parameters)
 009h   AllocateUuids           (12 bytes of parameters)
 00Ah   AllocateVirtualMemory   (24 bytes of parameters)
 00Bh   CallbackReturn          (12 bytes of parameters)
 00Ch   CancelIoFile            (8 bytes of parameters)
 00Dh   CancelTimer             (8 bytes of parameters)
 00Eh   ClearEvent              (4 bytes of parameters)
 00Fh   Close                   (4 bytes of parameters)
 010h   CloseObjectAuditAlarm   (12 bytes of parameters)
 011h   CompleteConnectPort     (4 bytes of parameters)
 012h   ConnectPort             (32 bytes of parameters)
 013h   Continue                (8 bytes of parameters)
 014h   CreateDirectoryObject   (12 bytes of parameters)
 015h   CreateEvent             (20 bytes of parameters)
 016h   CreateEventPair         (12 bytes of parameters)
 017h   CreateFile              (44 bytes of parameters)
 018h   CreateIoCompletion      (16 bytes of parameters)
 019h   CreateKey               (28 bytes of parameters)
 01Ah   CreateMailslotFile      (32 bytes of parameters)
 01Bh   CreateMutant            (16 bytes of parameters)
 01Ch   CreateNamedPipeFile     (56 bytes of parameters)
 01Dh   CreatePagingFile        (16 bytes of parameters)
 01Eh   CreatePort              (20 bytes of parameters)
 01Fh   CreateProcess           (32 bytes of parameters)
 020h   CreateProfile           (36 bytes of parameters)
 021h   CreateSection           (28 bytes of parameters)
 022h   CreateSemaphore         (20 bytes of parameters)
 023h   CreateSymbolicLinkObject        (16 bytes of parameters)
 024h   CreateThread            (32 bytes of parameters)
 025h   CreateTimer             (16 bytes of parameters)
 026h   CreateToken             (52 bytes of parameters)
 027h   DelayExecution          (8 bytes of parameters)
 028h   DeleteAtom              (4 bytes of parameters)
 029h   DeleteFile              (4 bytes of parameters)
 02Ah   DeleteKey               (4 bytes of parameters)
 02Bh   DeleteObjectAuditAlarm  (12 bytes of parameters)
 02Ch   DeleteValueKey          (8 bytes of parameters)
 02Dh   DeviceIoControlFile     (40 bytes of parameters)
 02Eh   DisplayString           (4 bytes of parameters)
 02Fh   DuplicateObject         (28 bytes of parameters)
 030h   DuplicateToken          (24 bytes of parameters)
 031h   EnumerateKey            (24 bytes of parameters)
 032h   EnumerateValueKey       (24 bytes of parameters)
 033h   ExtendSection           (8 bytes of parameters)
 034h   FindAtom                (8 bytes of parameters)
 035h   FlushBuffersFile        (8 bytes of parameters)
 036h   FlushInstructionCache   (12 bytes of parameters)
 037h   FlushKey                (4 bytes of parameters)
 038h   FlushVirtualMemory      (16 bytes of parameters)
 039h   FlushWriteBuffer        (no parameters)
 03Ah   FreeVirtualMemory       (16 bytes of parameters)
 03Bh   FsControlFile           (40 bytes of parameters)
 03Ch   GetContextThread        (8 bytes of parameters)
 03Dh   GetPlugPlayEvent        (16 bytes of parameters)
 03Eh   GetTickCount            (no parameters)
 03Fh   ImpersonateClientOfPort (8 bytes of parameters)
 040h   ImpersonateThread       (12 bytes of parameters)
 041h   InitializeRegistry      (4 bytes of parameters)
 042h   ListenPort              (8 bytes of parameters)
 043h   LoadDriver              (4 bytes of parameters)
 044h   LoadKey (8 bytes of parameters)
 045h   LoadKey2                (12 bytes of parameters)
 046h   LockFile                (40 bytes of parameters)
 047h   LockVirtualMemory       (16 bytes of parameters)
 048h   MakeTemporaryObject     (4 bytes of parameters)
 049h   MapViewOfSection        (40 bytes of parameters)
 04Ah   NotifyChangeDirectoryFile       (36 bytes of parameters)
 04Bh   NotifyChangeKey         (40 bytes of parameters)
 04Ch   OpenDirectoryObject     (12 bytes of parameters)
 04Dh   OpenEvent               (12 bytes of parameters)
 04Eh   OpenEventPair           (12 bytes of parameters)
 04Fh   OpenFile                (24 bytes of parameters)
 050h   OpenIoCompletion        (12 bytes of parameters)
 051h   OpenKey                 (12 bytes of parameters)
 052h   OpenMutant              (12 bytes of parameters)
 053h   OpenObjectAuditAlarm    (48 bytes of parameters)
 054h   OpenProcess             (16 bytes of parameters)
 055h   OpenProcessToken        (12 bytes of parameters)
 056h   OpenSection             (12 bytes of parameters)
 057h   OpenSemaphore           (12 bytes of parameters)
 058h   OpenSymbolicLinkObject  (12 bytes of parameters)
 059h   OpenThread              (16 bytes of parameters)
 05Ah   OpenThreadToken         (16 bytes of parameters)
 05Bh   OpenTimer               (12 bytes of parameters)
 05Ch   PlugPlayControl         (16 bytes of parameters)
 05Dh   PrivilegeCheck          (12 bytes of parameters)
 05Eh   PrivilegedServiceAuditAlarm     (20 bytes of parameters)
 05Fh   PrivilegeObjectAuditAlarm       (24 bytes of parameters)
 060h   ProtectVirtualMemory    (20 bytes of parameters)
 061h   PulseEvent              (8 bytes of parameters)
 062h   QueryInformationAtom    (20 bytes of parameters)
 063h   QueryAttributesFile     (8 bytes of parameters)
 064h   QueryDefaultLocale      (8 bytes of parameters)
 065h   QueryDirectoryFile      (44 bytes of parameters)
 066h   QueryDirectoryObject    (28 bytes of parameters)
 067h   QueryEaFile             (36 bytes of parameters)
 068h   QueryEvent              (20 bytes of parameters)
 069h   QueryFullAttributesFile (8 bytes of parameters)
 06Ah   QueryInformationFile    (20 bytes of parameters)
 06Bh   QueryIoCompletion       (20 bytes of parameters)
 06Ch   QueryInformationPort    (20 bytes of parameters)
 06Dh   QueryInformationProcess (20 bytes of parameters)
 06Eh   QueryInformationThread  (20 bytes of parameters)
 06Fh   QueryInformationToken   (20 bytes of parameters)
 070h   QueryIntervalProfile    (8 bytes of parameters)
 071h   QueryKey                (20 bytes of parameters)
 072h   QueryMultipleValueKey   (24 bytes of parameters)
 073h   QueryMutant             (20 bytes of parameters)
 074h   QueryObject             (20 bytes of parameters)
 075h   QueryOleDirectoryFile   (44 bytes of parameters)
 076h   QueryPerformanceCounter (8 bytes of parameters)
 077h   QuerySection            (20 bytes of parameters)
 078h   QuerySecurityObject     (20 bytes of parameters)
 079h   QuerySemaphore          (20 bytes of parameters)
 07Ah   QuerySymbolicLinkObject (12 bytes of parameters)
 07Bh   QuerySystemEnvironmentValue     (16 bytes of parameters)
 07Ch   QuerySystemInformation  (16 bytes of parameters)
 07Dh   QuerySystemTime         (4 bytes of parameters)
 07Eh   QueryTimer              (20 bytes of parameters)
 07Fh   QueryTimerResolution    (12 bytes of parameters)
 080h   QueryValueKey           (24 bytes of parameters)
 081h   QueryVirtualMemory      (24 bytes of parameters)
 082h   QueryVolumeInformationFile      (20 bytes of parameters)
 083h   QueueApcThread          (20 bytes of parameters)
 084h   RaiseException          (12 bytes of parameters)
 085h   RaiseHardError          (24 bytes of parameters)
 086h   ReadFile                (36 bytes of parameters)
 087h   ReadFileScatter         (36 bytes of parameters)
 088h   ReadRequestData         (24 bytes of parameters)
 089h   ReadVirtualMemory       (20 bytes of parameters)
 08Ah   RegisterThreadTerminatePort     (4 bytes of parameters)
 08Bh   ReleaseMutant           (8 bytes of parameters)
 08Ch   ReleaseSemaphore        (12 bytes of parameters)
 08Dh   RemoveIoCompletion      (20 bytes of parameters)
 08Eh   ReplaceKey              (12 bytes of parameters)
 08Fh   ReplyPort               (8 bytes of parameters)
 090h   ReplyWaitReceivePort    (16 bytes of parameters)
 091h   ReplyWaitReplyPort      (8 bytes of parameters)
 092h   RequestPort             (8 bytes of parameters)
 093h   RequestWaitReplyPort    (12 bytes of parameters)
 094h   ResetEvent              (8 bytes of parameters)
 095h   RestoreKey              (12 bytes of parameters)
 096h   ResumeThread            (8 bytes of parameters)
 097h   SaveKey (8 bytes of parameters)
 098h   SetIoCompletion         (20 bytes of parameters)
 099h   SetContextThread        (8 bytes of parameters)
 09Ah   SetDefaultHardErrorPort (4 bytes of parameters)
 09Bh   SetDefaultLocale        (8 bytes of parameters)
 09Ch   SetEaFile               (16 bytes of parameters)
 09Dh   SetEvent                (8 bytes of parameters)
 09Eh   SetHighEventPair        (4 bytes of parameters)
 09Fh   SetHighWaitLowEventPair (4 bytes of parameters)
 0A0h   ???                     (??? bytes of parameters)
 0A1h   SetInformationFile      (20 bytes of parameters)
 0A2h   SetInformationKey       (16 bytes of parameters)
 0A3h   SetInformationObject    (16 bytes of parameters)
 0A4h   SetInformationProcess   (16 bytes of parameters)
 0A5h   SetInformationThread    (16 bytes of parameters)
 0A6h   SetInformationToken     (16 bytes of parameters)
 0A7h   SetIntervalProfile      (8 bytes of parameters)
 0A8h   SetLdtEntries           (24 bytes of parameters)
 0A9h   SetLowEventPair         (4 bytes of parameters)
 0AAh   SetLowWaitHighEventPair (4 bytes of parameters)
 0ABh   ???                     (??? bytes of parameters)
 0ACh   SetSecurityObject       (12 bytes of parameters)
 0ADh   SetSystemEnvironmentValue       (8 bytes of parameters)
 0AEh   SetSystemInformation    (12 bytes of parameters)
 0AFh   SetSystemPowerState     (12 bytes of parameters)
 0B0h   SetSystemTime           (8 bytes of parameters)
 0B1h   SetTimer                (28 bytes of parameters)
 0B2h   SetTimerResolution      (12 bytes of parameters)
 0B3h   SetValueKey             (24 bytes of parameters)
 0B4h   SetVolumeInformationFile        (20 bytes of parameters)
 0B5h   ShutdownSystem          (4 bytes of parameters)
 0B6h   SignalAndWaitForSingleObject    (16 bytes of parameters)
 0B7h   StartProfile            (4 bytes of parameters)
 0B8h   StopProfile             (4 bytes of parameters)
 0B9h   SuspendThread           (8 bytes of parameters)
 0BAh   SystemDebugControl      (24 bytes of parameters)
 0BBh   TerminateProcess        (8 bytes of parameters)
 0BCh   TerminateThread         (8 bytes of parameters)
 0BDh   TestAlert               (no parameters)
 0BEh   UnloadDriver            (4 bytes of parameters)
 0BFh   UnloadKey               (4 bytes of parameters)
 0C0h   UnlockFile              (20 bytes of parameters)
 0C1h   UnlockVirtualMemory     (16 bytes of parameters)
 0C2h   UnmapViewOfSection      (8 bytes of parameters)
 0C3h   VdmControl              (8 bytes of parameters)
 0C4h   WaitForMultipleObjects  (20 bytes of parameters)
 0C5h   WaitForSingleObject     (12 bytes of parameters)
 0C6h   WaitHighEventPair       (4 bytes of parameters)
 0C7h   WaitLowEventPair        (4 bytes of parameters)
 0C8h   WriteFile               (36 bytes of parameters)
 0C9h   WriteFileGather         (36 bytes of parameters)
 0CAh   WriteRequestData        (24 bytes of parameters)
 0CBh   WriteVirtualMemory      (20 bytes of parameters)
 0CCh   W32Call                 (20 bytes of parameters)
 0CDh   CreateChannel           (8 bytes of parameters)
 0CEh   ListenChannel           (8 bytes of parameters)
 0CFh   OpenChannel             (8 bytes of parameters)
 0D0h   ReplyWaitSendChannel    (12 bytes of parameters)
 0D1h   SendWaitReplyChannel    (16 bytes of parameters)
 0D2h   SetContextChannel       (4 bytes of parameters)
 0D3h   YieldExecution          (no parameters)
--------l-2E----BXE22E-----------------------
INT 2E - 4DOS v2.x-3.03 SHELL2E.COM - UNINSTALL
        BX = E22Eh
        DS:SI -> zero byte
Return: if successful, SHELL2E terminates itself with INT 21/AH=4Ch
----------2F---------------------------------
INT 2F - Multiplex - NOTES
        AH = identifier of program which is to handle the interrupt
           00h-7Fh reserved for DOS
           B8h-BFh reserved for networks
           C0h-FFh reserved for applications
        AL is the function code
   This is a general mechanism for verifying the presence of a TSR and
   communicating with it.  When searching for a free identifier code for AH
   using the installation check (AL=00h), the calling program should set
   BX/CX/DX to 0000h and must not depend on any registers other than CS:IP
   and SS:SP to be valid on return, since numerous programs now use additional
   registers on input and/or output for the installation check.
Notes:  Since the multiplex chain is growing so long, and beginning to
          experience multiplex number collisions, I have proposed an alternate
          multiplex interrupt on INT 2D.  If you decide to use the alternate
          multiplex, please let me know.
        DOS and some other programs return values in the flags register, so
          any TSR which chains by calling the previous handler rather than
          jumping to it should ensure that the returned flags are preserved
          and passed back to the original caller
SeeAlso: INT 2D"ALTERNATE MULTIPLEX"
--------t-2F---------------------------------
INT 2F - BMB Compuscience Canada Utilities Interface - INSTALLATION CHECK
        AH = xx (dynamically assigned based upon a search for a multiplex
                 number which doesn't answer installed)
        AL = 00h installation check
        ES:DI = EBEBh:BEBEh
Return: AL = 00h not installed
             01h not installed, not OK to install
             FFh installed; if ES:DI was EBEBh:BEBEh on entry, ES:DI will point
                 to a string of the form 'MMMMPPPPPPPPvNNNN' where MMMM is a
                 short form of the manufacturer's name, PPPPPPPP is a product
                 name and NNNN is the product's version number
--------t-2F---------------------------------
INT 2F - Ross Wentworth's Turbo Pascal POPUP LIBRARY
        AH = programmer-selected multiplex number
        AL = function
            00h installation check
                Return: AL = FFh if installed
            01h get TSR interrupt vectors
                Return: DX:AX -> vector table (see #02587)
            02h get TSR code segment
                Return: AX = code segment for all interrupt handlers
            03h call user exit routine and release TSR's memory
            04h get signature string
                Return: DX:AX -> counted string containing signature
            05h get TSR's INT 2F handler
                Return: DX:AX -> INT 2F handler
            06h enable/disable TSR
                BL = new state (00h disabled, 01h enabled)
            07h activate TSR (popup if not disabled)
            08h get hotkeys
                BL = which hotkey (00h = hotkey 1, 01h = hotkey 2)
                Return: AX = hotkey (AH = keyflags, AL = scancode)
            09h set hotkey
                BL = which hotkey (00h = hotkey 1, 01h = hotkey 2)
                CX = new hotkey (CH = keyflags, CL = scancode)
            0Ah-1Fh reserved
Index:  installation check;Ross Wentworth POPUP library
Index:  hotkeys;Ross Wentworth POPUP library

Format of POPUP vector table entry:
Offset  Size    Description     (Table 02587)
 00h    BYTE    vector number (00h = end of table)
 01h    DWORD   original vector
 05h    WORD    offset of interrupt handler in TSR's code segment
--------t-2F---------------------------------
INT 2F - CiriSOFT Spanish University of Valladolid TSR's Interface
        AH = xx (dynamically assigned based upon a search for a multiplex
                 number from C0h to FFh which doesn't answer installed)
        AL = 00h installation check
        ES:DI = 1492h:1992h
Return: AL = 00h not installed
             01h not installed, not OK to install
             FFh installed; and if ES:DI was 1492h:1992h on entry, ES:DI will
                   point to author_name_ver table (see #02588)
        AH = FFh
Note:   this interface permits advanced communication with TSRs: it is possible
          to make a generic uninstall utility, advanced TSR relocator programs
          in order to fit fragmented memory areas, etc.
See also: INT 2D"AMIS",INT 2F"Compuscience"
Index:  installation check;CiriSOFT TSR interface
Index:  uninstall;CiriSOFT TSR interface

Format of CiriSOFT author_name_ver table:
Offset  Size    Description     (Table 02588)
 -16    WORD    segment of the start of the resident TSR code (CS in programs
                  with PSP, XMS upper memory segment if installed as UMB...)
 -14    WORD    offset of the start of the resident TSR code (frequently 100h
                  in *.COM programs and 0 in upper memory TSR's).
 -12    WORD    memory used by TSR (in paragraphs). Knowing the memory area
                  used by TSR is possible to determine if hooked vectors are
                  still pointing it (and if it is safe to uninstall).
 -10    BYTE    characteristics byte (see #02589)
 -9     BYTE    number of multiplex entry used (redefinition available). Note
                  that the TSR must use THIS variable in it's INT 2Fh handler.
 -8     WORD    offset to vector_area table (see #02590)
 -6     WORD    offset to extra_area table (see #02591,#02589 [bit 7])
 -4   4 BYTEs   signature string "*##*"
 00h    var     "AUTHOR:PROGRAM_NAME:VERSION",0  (variable length, this area
                  is used in order to determine if the TSR is already resident
                  and it's version code; the ':' char is used as delimiter)

Bitfields for CiriSOFT characteristics byte:
Bit(s)  Description     (Table 02589)
 0-2    type
        000 normal program (with PSP)
        001 upper XMS memory block (needed HIMEM.SYS function to free memory
              when uninstalling)
        010 device driver (*.SYS)
        011 device driver in EXE format
        1xx others (reserved)
 3-6    reserved
 7      set if extra_table defined and supported (see #02591)
SeeAlso: #02588

Format of CiriSOFT vector_area table:
Offset  Size    Description     (Table 02590)
 -1     BYTE    number of vectors intercepted by TSR
 00h    BYTE    first vector number
 01h    DWORD   first vector pointer before installing the TSR
 05h    BYTE    second vector number
 06h    DWORD   second vector pointer before installing the TSR
 0Ah    ...     (and so on)
Note:   the TSR must use these variables to invoke the previous interrupt
          handler routines
SeeAlso: #02588

Format of extra_area table (needed only to improve relocation feature):
Offset  Size    Description     (Table 02591)
 00h    WORD    offset to external_ctrl table (see #02592)
                0000h if not supported
 02h    WORD    reserved for future use (0)
SeeAlso: #02588

Format of CiriSOFT external_ctrl table:
Offset  Size    Description     (Table 02592)
 00h    BYTE    bit 0: TSR is relocatable (no absolute segment references)
 01h    WORD    offset to a variable which can activate/inhibit the TSR
 ---And if bit 0 in offset 00h is off:
 03h    DWORD   pointer to ASCIZ pathname for executable file which supports
                  /SR parameter (silent installation & inhibit)
 07h    DWORD   pointer to first variable to initialize on the copy reloaded
                  from the previous TSR still resident
 0Bh    DWORD   pointer to last variable (all variables packed in one block)
--------c-2F00-------------------------------
INT 2F U - DOS 2.x only PRINT.COM - SUBMIT FILE FOR PRINTING
        AH = 00h
        DS:DX -> opened FCB (see #01345 at INT 21/AX=0Fh)
Return: AH = number of files currently in print queue
        AL = status
            00h file successfully added
            01h queue is full
        ES:BX -> print queue (10 FCBs; first byte of FFh indicates unused)
        ES:DX -> currently-printing FCB (if DX=FFFFh, none printing)
Notes:  DOS 2.x PRINT.COM does not chain to previous INT 2F handler
        values in AH other than 00h or 01h cause PRINT to return the number of
          files in the queue in AH
SeeAlso: AH=01h"PRINT",AX=0102h
--------P-2F00-------------------------------
INT 2F U - PSPRINT - PRINT JOB CONTROL
        AH = 00h
        ???
Return: ???
--------c-2F0080-----------------------------
INT 2F - DOS 3.1+ PRINT - GIVE PRINT A TIME SLICE
        AX = 0080h
Return: after PRINT executes
Notes:  PRINT returns AL=01h if AH=00h but AL is not 80h on entry
        this function is not supported by the Novell DOS 7 PRINT.COM
--------N-2F00D8-----------------------------
INT 2F - Personal NetWare - VLM - ???
        AX = 00D8h
        ???
Return: ???
Note:   hooked by one of the .VLMs loaded by VLM.EXE v1.10, but apparently a
          NOP
--------c-2F01-------------------------------
INT 2F U - DOS 2.x only PRINT.COM - REMOVE FILE FROM PRINT QUEUE
        AH = 01h
        DS:DX -> FCB (see #01345 at INT 21/AH=0Fh) for file to be canceled
Return: AH = number of files currently in print queue
        AL = 00h (successful)
        ES:BX -> print queue (10 FCBs; first byte of FFh indicates unused)
        ES:DX -> currently-printing FCB (if DX=FFFFh, none printing)
Notes:  DOS 2.x PRINT.COM does not chain to previous INT 2F handler
        values in AH other than 00h or 01h cause PRINT to return the number of
          files in the queue in AH
SeeAlso: AH=00h"PRINT.COM",AX=0103h
--------c-2F0100-----------------------------
INT 2F - DOS 3.0+ PRINT - INSTALLATION CHECK
        AX = 0100h
Return: AL = status
            00h not installed
            01h not installed, but not OK to install
            FFh installed
                AH = 00h (Novell DOS 7)
SeeAlso: AX=0101h
--------c-2F0100SI20D6-----------------------
INT 2F U - PrintCache 3.1 PRINT.COM - INSTALLATION CHECK
        AX = 0100h
        SI = 20D6h
        DI = 8761h
Return: AX = 00FFh if installed
        DI = 0001h if PrintCache's PRINT.COM installed and magic values match
            SI = resident code segment
Program: PrintCache PRINT.COM is a DOS PRINT replacement included in
          LaserTools' PrintCache memory/disk-based print spooler package
Note:   if either of SI or DI differ from the indicated magic values, only AX
          will be modified on return, for compatibility with DOS PRINT
SeeAlso: AX=0101h/SI=20D6h,AX=C000h"PCACHE"
--------c-2F0101-----------------------------
INT 2F - DOS 3.0+ PRINT - SUBMIT FILE FOR PRINTING
        AX = 0101h
        DS:DX -> submit packet (see #02593)
Return: CF clear if successful
            AL = status
                01h added to queue
                9Eh now printing
        CF set on error
            AX = error code (see #02594,#01680 at INT 21/AH=59h/BX=0000h)
SeeAlso: AX=0102h

Format of PRINT submit packet:
Offset  Size    Description     (Table 02593)
 00h    BYTE    level (must be 00h)
 01h    DWORD   pointer to ASCIZ filename (no wildcards)

(Table 02594)
Values for PRINT error code:
 0001h  invalid function
 0002h  file not found
 0003h  path not found
 0004h  out of file handles
 0005h  access denied
 0008h  print queue full
 0009h  spooler busy
 000Ch  name too long
 000Fh  invalid drive
--------c-2F0101SI20D6-----------------------
INT 2F U - PrintCache v3.1 PRINT.COM - SUBMIT FILE FOR PRINTING
        AX = 0101h
        SI = 20D6h
        DI = 8761h
        DS:DX -> submit packet (see #02593)
        CL = print options
            bit 4: use default options
Return: CF clear if successful
            AL = status
                01h added to queue
                9Eh now printing
        CF set on error
            AX = error code (see #02594)
Program: PrintCache PRINT.COM is a DOS PRINT replacement included in
          LaserTools' PrintCache memory/disk-based print spooler package
Note:   if either SI or DI differs from the indicated magic values on entry,
          PrintCache will use the default print options for the file for
          compatibility with DOS PRINT
SeeAlso: AX=0100h/SI=20D6h,AX=0101h,AH=00h"PRINT",AX=0107h"PrintCache"
--------c-2F0102-----------------------------
INT 2F - DOS 3.0+ PRINT - REMOVE FILE FROM PRINT QUEUE
        AX = 0102h
        DS:DX -> ASCIZ filename (wildcards allowed)
Return: CF clear if successful
        CF set on error
            AX = error code (see #02594)
SeeAlso: AX=0101h,AX=0103h,AH=01h"PRINT"
--------c-2F0103-----------------------------
INT 2F - DOS 3.0+ PRINT - CANCEL ALL FILES IN PRINT QUEUE
        AX = 0103h
Return: CF clear if successful
        CF set on error
            AX = error code (see #02594)
SeeAlso: AX=0102h
--------c-2F0104-----------------------------
INT 2F - DOS 3.0+ PRINT - FREEZE PRINT QUEUE TO READ JOB STATUS
        AX = 0104h
Return: CF clear if successful
            DX = error count since status last read
            DS:SI -> print queue
        CF set on error
            AX = error code (see #02594)
Desc:   get the list of print jobs, temporarily suspending PRINT's activities
          to avoid changing the list while it is being examined
Notes:  the print queue is an array of 64-byte ASCIZ filenames terminated by
          an empty filename; the first name is the file currently being printed
        printing is stopped until AX=0105h is called to prevent the queue
          from changing while the filenames are being read
SeeAlso: AX=0101h,AX=0105h
--------c-2F0105-----------------------------
INT 2F - DOS 3.0+ PRINT - RESTART PRINT QUEUE AFTER STATUS READ
        AX = 0105h
Return: CF clear if successful
        CF set on error
            AX = error code (see #02594)
Desc:   restart PRINT's activities once an application finishes examining the
          print queue
SeeAlso: AX=0104h
--------c-2F0106-----------------------------
INT 2F - DOS 3.3+ PRINT - GET PRINTER DEVICE
        AX = 0106h
Return: CF set if files in print queue
            AX = error code 0008h (queue full)
            DS:SI -> device driver header (see #01646)
        CF clear if print queue empty
            AX = 0000h
Desc:   determine which device, if any, PRINT is currently using for output
Notes:  undocumented prior to the release of MS-DOS 5.0
        this function can be used to allow a program to avoid printing to the
          printer on which PRINT is currently performing output
SeeAlso: AX=0104h
--------c-2F0107-----------------------------
INT 2F U - PrintCache v3.1 PRINT.COM - SET TRAILING FORM FEEDS
        AX = 0107h
        CL bit 0: output form feed between print jobs
Return: AL destroyed
SeeAlso: AX=0100h/SI=20D6h,AX=0101h/SI=20D6h
--------N-2F0200-----------------------------
INT 2F U - PC LAN PROGRAM REDIR/REDIRIFS internal - INSTALLATION CHECK
        AX = 0200h
Return: AL = FFh if installed
Desc:   determine whether the PC LAN Program redirector is installed
SeeAlso: AX=0201h,AX=0203h
--------N-2F0201-----------------------------
INT 2F U - PC LAN PROGRAM REDIR/REDIRIFS internal - ???
        AX = 0201h
Return: nothing???
Notes:  this function is called by the DOS 3.3+ PRINT.COM
        AX=0202h appears to be the opposite function
        these functions are supposedly used to signal opening and closing of
          printers
SeeAlso: AX=0202h
--------N-2F0202-----------------------------
INT 2F U - PC LAN PROGRAM REDIR/REDIRIFS internal - ???
        AX = 0202h
        ???
Return: nothing???
Notes:  this function is called by the DOS 3.3+ PRINT.COM
        these functions are supposedly used to signal opening and closing of
          printers
SeeAlso: AX=0201h
--------N-2F0203-----------------------------
INT 2F U - PC LAN PROGRAM REDIR/REDIRIFS internal - ???
        AX = 0203h
Return: nothing???
Notes:  this function is called by the DOS 3.3+ PRINT.COM
        AX=0204h appears to be the opposite function
        these functions are supposedly used to signal opening and closing of
          printers
SeeAlso: AX=0200h,AX=0204h
--------N-2F0204-----------------------------
INT 2F U - PC LAN PROGRAM REDIR/REDIRIFS internal - ???
        AX = 0204h
        ???
Return: nothing???
Notes:  this function is called by the DOS 3.3+ PRINT.COM
        AX=0203h appears to be the opposite function
        these functions are supposedly used to signal opening and closing of
          printers
SeeAlso: AX=0200h,AX=0203h
--------N-2F---------------------------------
INT 2F U - PC LAN PROGRAM REDIR/REDIRIFS internal - ???
        AX = 02xxh
        ???
Return: ???
--------l-2F0500-----------------------------
INT 2F U - DOS 3.0+ CRITICAL ERROR HANDLER - INSTALLATION CHECK
        AX = 0500h
Return: AL = status
            00h not installed, OK to install
            01h not installed, can't install
            FFh installed
        BX destroyed (MSCDEX v2.21-2.25)
        CF clear (MSCDEX v2.21-2.25)
Desc:   determine whether a critical error message override is installed
Note:   this set of functions allows a user program to partially or completely
          override the default critical error handler's message in COMMAND.COM
SeeAlso: AH=05h,INT 24
--------l-2F05-------------------------------
INT 2F CU - DOS 3.0+ CRITICAL ERROR HANDLER - EXPAND ERROR INTO STRING
        AH = 05h
---DOS 3.x---
        AL = extended error code (not zero)
---DOS 4.0+ ---
        AL = error type
            01h DOS extended error code
            02h parameter error
        BX = error code
Return: CF clear if successful
            ES:DI -> ASCIZ error message (read-only)
            AL = completion state
                00h message requires completion with device name, drive, etc.
                01h message is complete as returned
        CF set if error code can't be converted to string
            AX,DI,ES destroyed
        other flags corrupted
Notes:  called at start of COMMAND.COM's default critical error handler if
          installed by a user program, allowing partial or complete overriding
          of the default error messages
        subfunction 02h is called by many DOS 4 external programs
        DR DOS's COMMAND.COM appends additional info ("0 files copied") to the
          returned string
SeeAlso: AX=0500h,AX=122Eh,INT 24
--------U-2F0600-----------------------------
INT 2F - DOS 3.0+ ASSIGN - INSTALLATION CHECK
        AX = 0600h
Return: AL = status
            00h not installed
            01h not installed, but not OK to install
            FFh installed
Notes:  ASSIGN is not a TSR in DR DOS 5.0; it is internally replaced by SUBST
          (see INT 21/AH=52h)
        undocumented prior to the release of DOS 5.0
SeeAlso: AX=0601h,INT 21/AH=52h
--------U-2F0601-----------------------------
INT 2F U - DOS 3.0+ ASSIGN - GET DRIVE ASSIGNMENT TABLE
        AX = 0601h
Return: ES = segment of ASSIGN work area and assignment table
Note:   the 26 bytes starting at ES:0103h specify which drive each of A: to Z:
          is mapped to.  Initially set to 01h 02h 03h....
SeeAlso: AX=0600h,AX=AF14h"WinDOS"
--------D-2F0800-----------------------------
INT 2F U - DRIVER.SYS support - INSTALLATION CHECK
        AX = 0800h
Return: AL = status
            00h not installed, OK to install
            01h not installed, not OK to install
            FFh installed
Desc:   determine whether the internal support code used by DRIVER.SYS is
          present; it is always present in DOS 3.2+
Note:   supported by DR DOS 5.0 and Novell DOS 7
--------D-2F0801-----------------------------
INT 2F U - DRIVER.SYS support - ADD NEW BLOCK DEVICE
        AX = 0801h
        DS:DI -> drive data table (see #02601,#02602,#02603)
Return: AX,BX,SI,ES destroyed
Notes:  moves down internal list of drive data tables, copying and modifying
          the drive description flags word for tables referencing same physical
          drive
        the data table is appended to the chain of tables
        supported by DR DOS 5.0 and Novell DOS 7
SeeAlso: AX=0803h
--------D-2F0802-----------------------------
INT 2F U - DRIVER.SYS support - EXECUTE DEVICE DRIVER REQUEST
        AX = 0802h
        ES:BX -> device driver request header (see #02597)
Return: request header updated as per requested operation
        STACK:  WORD    original flags from INT call (left by RETF in device
                          driver, at least in DOS 5.0-6.22)
Notes:  supported by DR DOS 5.0
        DOS 3.2 executes this function on any AL value from 02h through F7h;
          DOS 4.0+ executes this function on AL=02h and AL=04h-F7h
        the command codes (see #02595) and structures described below apply
          to all drivers which support the appropriate commands; this call is
          just one of a number of ways in which a device driver request may
          be invoked
        supported by Novell DOS 7
SeeAlso: AX=0800h,AX=0801h,AX=0803h,AX=1510h,INT 21/AH=52h,INT 21/AH=99h
SeeAlso: INT 21/AH=9Ah

(Table 02595)
Values for device driver command code:
 00h (0)  INIT
 01h (1)  MEDIA CHECK (block devices)
 02h (2)  BUILD BPB (block devices)
 03h (3)  IOCTL INPUT
 04h (4)  INPUT
 05h (5)  NONDESTRUCTIVE INPUT, NO WAIT (character devices)
 06h (6)  INPUT STATUS (character devices)
 07h (7)  INPUT FLUSH (character devices)
 08h (8)  OUTPUT
 09h (9)  OUTPUT WITH VERIFY
 0Ah (10) OUTPUT STATUS (character devices)
 0Bh (11) OUTPUT FLUSH (character devices)
 0Ch (12) IOCTL OUTPUT
 0Dh (13) (DOS 3.0+) DEVICE OPEN
 0Eh (14) (DOS 3.0+) DEVICE CLOSE
 0Fh (15) (DOS 3.0+) REMOVABLE MEDIA (block devices)
 10h (16) (DOS 3.0+) OUTPUT UNTIL BUSY (character devices)
 11h (17) (European MS-DOS 4.0) STOP OUTPUT (console screen drivers only)
 12h (18) (European MS-DOS 4.0) RESTART OUTPUT (console screen drivers only)
 13h (19) (DOS 3.2+) GENERIC IOCTL
 14h (20) unused
 15h (21) (European MS-DOS 4.0) RESET UNCERTAIN MEDIA FLAG
 16h (22) unused
 17h (23) (DOS 3.2+) GET LOGICAL DEVICE
 18h (24) (DOS 3.2+) SET LOGICAL DEVICE
 19h (25) (DOS 5.0+) CHECK GENERIC IOCTL SUPPORT
 80h (128)(CD-ROM) READ LONG
 81h (129)(CD-ROM) reserved
 82h (130)(CD-ROM) READ LONG PREFETCH
 83h (131)(CD-ROM) SEEK
 84h (132)(CD-ROM) PLAY AUDIO
 85h (133)(CD-ROM) STOP AUDIO
 86h (134)(CD-ROM) WRITE LONG
 87h (135)(CD-ROM) WRITE LONG VERIFY
 88h (136)(CD-ROM) RESUME AUDIO

Bitfields for device request status:
Bit(s)  Description     (Table 02596)
 15     error
 14-11  reserved
 10     ??? set by DOS kernel on entry to some driver calls
 9      busy
 8      done (may be clear on return under European MS-DOS 4.0)
 7-0    error code if bit 15 set (see #02598)

Format of device driver request header:
Offset  Size    Description     (Table 02597)
 00h    BYTE    length of request header
 01h    BYTE    subunit within device driver
 02h    BYTE    command code (see #02595)
 03h    WORD    status (filled in by device driver) (see #02596)
---DOS---
 05h  4 BYTEs   reserved (unused in DOS 2.x and 3.x)
 09h    DWORD   (European MS-DOS 4.0 only) pointer to next request header in
                          device's request queue
                (other versions) reserved (unused in DOS 2.x and 3.x)
---STARLITE architecture---
 05h    DWORD   pointer to next request header
 09h  4 BYTEs   reserved
---command code 00h---
 0Dh    BYTE    (ret) number of units
 0Eh    DWORD   (call) pointer to DOS device helper function (see #02599)
                          (European MS-DOS 4.0 only)
                (call) pointer past end of memory available to driver (DOS 5+)
                (ret) address of first free byte following driver
 12h    DWORD   (call) pointer to commandline arguments
                (ret) pointer to BPB array (block drivers) or
                          0000h:0000h (character drivers)
 16h    BYTE    (DOS 3.0+) drive number for first unit of block driver (0=A)
   ---European MS-DOS 4.0---
 17h    DWORD   pointer to function to save registers on stack
   ---DOS 5+ ---
 17h    WORD    (ret) error-message flag
                0001h MS-DOS should display error msg on init failure
---command code 01h---
 0Dh    BYTE    media descriptor
 0Eh    BYTE    (ret) media status
                00h don't know
                01h media has not changed
                FFh media has been changed
 0Fh    DWORD   (ret, DOS 3.0+) pointer to previous volume ID if the
                  OPEN/CLOSE/RM bit in device header is set and disk changed
---command code 02h---
 0Dh    BYTE    media descriptor
 0Eh    DWORD   transfer address
                -> scratch sector if NON-IBM FORMAT bit in device header set
                -> first FAT sector otherwise
 12h    DWORD   pointer to BPB (set by driver) (see #01663 at INT 21/AH=53h)
---command codes 03h,0Ch---
                  (see also INT 21/AX=4402h"DOS 2+",INT 21/AX=4403h"DOS")
 0Dh    BYTE    media descriptor (block devices only)
 0Eh    DWORD   transfer address
 12h    WORD    (call) number of bytes to read/write
                (ret) actual number of bytes read or written
---command codes 04h,08h,09h (except Compaq DOS 3.31, DR DOS 6)---
 0Dh    BYTE    media descriptor (block devices only)
 0Eh    DWORD   transfer address
 12h    WORD    byte count (character devices) or sector count (block devices)
 14h    WORD    starting sector number (block devices only)
 16h    DWORD   (DOS 3.0+) pointer to volume ID if error 0Fh returned
 1Ah    DWORD   (DOS 4.0+) 32-bit starting sector number (block devices with
                  device attribute word bit 1 set only) if starting sector
                  number above is FFFFh (see INT 21/AH=52h)
---command codes 04h,08h,09h (Compaq DOS 3.31, DR DOS 6)---
 0Dh    BYTE    media descriptor (block devices only)
 0Eh    DWORD   transfer address
 12h    WORD    byte count (character devices) or sector count (block devices)
 14h    DWORD   32-bit starting sector number (block devices only)
        Note:   to reliably determine which variant of the request block for
                  functions 04h,08h,09h has been passed to the driver, check
                  the length field as well as the word at offset 14h.  If the
                  length is 1Eh and 14h=FFFFh, use the DWORD at 1Ah as the
                  starting sector number; if the length is 18h, use the DWORD
                  at 14h; otherwise, use the WORD at 14h.
---command code 05h---
 0Dh    BYTE    byte read from device if BUSY bit clear on return
---command codes 06h,07h,0Ah,0Bh,0Dh,0Eh,0Fh---
 no further fields
---command code 10h---
 0Dh    BYTE    unused
 0Eh    DWORD   transfer address
 12h    WORD    (call) number of bytes to write
                (ret) actual number of bytes written
---command codes 11h,12h---
 0Dh    BYTE    reserved
---command code 15h---
 no further fields
---command codes 13h,19h---
 0Dh    BYTE    category code
                00h unknown
                01h COMn:
                03h CON
                05h LPTn:
                07h mouse (European MS-DOS 4.0)
                08h disk
                9Eh (STARLITE) Media Access Control driver
 0Eh    BYTE    function code
                00h (STARLITE) MAC Bind request
 0Fh    WORD    copy of DS at time of IOCTL call (apparently unused in DOS 3.3)
                SI contents (European MS-DOS 4.0)
 11h    WORD    offset of device driver header (see #01646)
                DI contents (European MS-DOS 4.0)
 13h    DWORD   pointer to parameter block from INT 21/AX=440Ch or AX=440Dh
---command codes 80h,82h---
 0Dh    BYTE    addressing mode
                00h HSG (default)
                01h Phillips/Sony Red Book
 0Eh    DWORD   transfer address (ignored for command 82h)
 12h    WORD    number of sectors to read
                (if 0 for command 82h, request is an advisory seek)
 14h    DWORD   starting sector number
                logical sector number in HSG mode
                frame/second/minute/unused in Red Book mode
                (HSG sector = minute * 4500 + second * 75 + frame - 150)
 18h    BYTE    data read mode
                00h cooked (2048 bytes per frame)
                01h raw (2352 bytes per frame, including EDC/ECC)
 19h    BYTE    interleave size (number of sectors stored consecutively)
 1Ah    BYTE    interleave skip factor
                (number of sectors between consecutive portions)
---command code 83h---
 0Dh    BYTE    addressing mode
                00h HSG (default)
                01h Phillips/Sony Red Book
 0Eh    DWORD   transfer address (ignored)
 12h    WORD    number of sectors to read (ignored)
 14h    DWORD   starting sector number (see also above)
---command code 84h---
 0Dh    BYTE    addressing mode
                00h HSG (default)
                01h Phillips/Sony Red Book
 0Eh    DWORD   starting sector number (see also above)
 12h    DWORD   number of sectors to play
---command codes 85h,88h---
 no further fields
---command codes 86h,87h---
 0Dh    BYTE    addressing mode
                00h HSG (default)
                01h Phillips/Sony Red Book
 0Eh    DWORD   transfer address (ignored in write mode 0)
 12h    WORD    number of sectors to write
 14h    DWORD   starting sector number (also see above)
 18h    BYTE    write mode
                00h mode 0 (write all zeros)
                01h mode 1 (default) (2048 bytes per sector)
                02h mode 2 form 1 (2048 bytes per sector)
                03h mode 2 form 2 (2336 bytes per sector)
 19h    BYTE    interleave size (number of sectors stored consecutively)
 1Ah    BYTE    interleave skip factor
                (number of sectors between consecutive portions)

(Table 02598)
Values for device driver error code:
 00h    write-protect violation
 01h    unknown unit
 02h    drive not ready
 03h    unknown command
 04h    CRC error
 05h    bad drive request structure length
 06h    seek error
 07h    unknown media
 08h    sector not found
 09h    printer out of paper
 0Ah    write fault
 0Bh    read fault
 0Ch    general failure
 0Dh    reserved
 0Eh    (CD-ROM) media unavailable
 0Fh    invalid disk change

(Table 02599)
Call European MS-DOS 4.0 device helper function with:
        DL = function
            00h "SchedClock" called on each timer tick
                AL = tick interval in milliseconds
            01h "DevDone" device I/O complete
                ES:BX -> request header
                Note:   must update status word first; may be called from
                          an interrupt handler
            02h "PullRequest" pull next request from queue
                DS:SI -> DWORD pointer to start of device's request queue
                Return: ZF clear if pending request
                            ES:BX -> request header
                        ZF set if no more requests
            03h "PullParticular" remove specific request from queue
                DS:SI -> DWORD pointer to start of device's request queue
                ES:BX -> request header
                Return: ZF set if request header not found
            04h "PushRequest" push the request onto the queue
                DS:SI -> DWORD pointer to start of device's request queue
                ES:BX -> request header
                interrupts disabled
            05h "ConsInputFilter" keyboard input check
                AX = character (high byte 00h if PC ASCII character)
                Return: ZF set if character should be discarded
                        ZF clear if character should be handled normally
                Note:   called by keyboard interrupt handler so DOS can scan
                          for special input characters
            06h "SortRequest" push request in sorted order by starting sector
                DS:SI -> DWORD pointer to start of device's request queue
                ES:BX -> request header
                interrupts disabled
            07h "SigEvent" send signal on keyboard event
                AH = event identifier
                Return: AL,FLAGS destroyed
            09h "ProcBlock" block on event
                AX:BX = event identifier (typically a pointer)
                CX = timeout in ms or 0000h for never
                DH = interruptable flag (nonzero if pause may be interrupted)
                interrupts disabled
                Return: after corresponding ProcRun call
                        CF clear if event wakeup, set if unusual wakeup
                        ZF set if timeout wakeup, clear if interrupted
                        AL = wakeup code, nonzero if unusual wakeup
                        interrupts enabled
                        BX,CX,DX destroyed
                Note:   block process and schedules another to run
            0Ah "ProcRun" unblock process
                AX:BX = event identifier (typically a pointer)
                Return: AX = number of processes awakened
                        ZF set if no processes awakened
                        BX,CX,DX destroyed
            0Bh "QueueInit" initialize/clear character queue
                DS:BX -> character queue structure (see #02600)
                Note:   the queue size field must be set before calling
            0Dh "QueueWrite" put a character in the queue
                DS:BX -> character queue (see #02600)
                AL = character to append to end of queue
                Return: ZF set if queue is full
                        ZF clear if character stored
            0Eh "QueueRead" get a character from the queue
                DS:BX -> character queue (see #02600)
                Return: ZF set if queue is empty
                        ZF clear if characters in queue
                            AL = first character in queue
            10h "GetDOSVar" return pointer to DOS variable
                AL = index of variable
                    03h current process ID
                BX = index into variable if AL specifies an array
                CX = expected length of variable
                Return: CF clear if successful
                            DX:AX -> variable
                        CF set on error
                            AX,DX destroyed
                        BX,CX destroyed
                Note:   the variables may not be modified
            14h "Yield" yield CPU if higher-priority task ready to run
                Return: FLAGS destroyed
            1Bh "CritEnter" begin system critical section
                DS:BX -> semaphore (6 BYTEs, initialized to zero)
                Return: AX,BX,CX,DX destroyed
            1Ch "CritLeave" end system critical section
                DS:BX -> semaphore (6 BYTEs, initialized to zero)
                Return: AX,BX,CX,DX destroyed
                Note:   must be called in the context of the process which
                          called CritEnter on the semaphore
Note:   the DWORD pointing at the request queue must be allocated by the driver
          and initialized to 0000h:0000h.  It always points at the next request
          to be executed

Format of European MS-DOS 4.0 character queue:
Offset  Size    Description     (Table 02600)
 00h    WORD    size of queue in bytes
 02h    WORD    index of next character out
 04h    WORD    count of characters in the queue
 06h  N BYTEs   queue buffer
--------D-2F0803-----------------------------
INT 2F U - DOS 4.0+ DRIVER.SYS support - GET DRIVE DATA TABLE LIST
        AX = 0803h
Return: DS:DI -> first drive data table in list (see #02601,#02602,#02603)
Note:   not available under DR DOS 5.0, but supported by Novell DOS 7 (using
          the MS-DOS 4+ data table format)
SeeAlso: AX=0801h

Format of DOS 3.30 drive data table:
Offset  Size    Description     (Table 02601)
 00h    DWORD   pointer to next table (offset FFFFh if last table)
 04h    BYTE    physical unit number (for INT 13)
 05h    BYTE    logical drive number (0=A:)
 06h 19 BYTEs   BIOS Parameter Block (see also INT 21/AH=53h)
                Offset  Size    Description
                 00h    WORD    bytes per sector
                 02h    BYTE    sectors per cluster, FFh if unknown
                 03h    WORD    number of reserved sectors
                 05h    BYTE    number of FATs
                 06h    WORD    number of root dir entries
                 08h    WORD    total sectors
                 0Ah    BYTE    media descriptor, 00h if unknown
                 0Bh    WORD    sectors per FAT
                 0Dh    WORD    sectors per track
                 0Fh    WORD    number of heads
                 11h    WORD    number of hidden sectors
 19h    BYTE    flags
                bit 6: 16-bit FAT instead of 12-bit FAT
 1Ah    WORD    number of DEVICE OPEN calls without corresponding DEVICE CLOSE
 1Ch 11 BYTEs   volume label or "NO NAME    " if none (always "NO NAME" for
                  fixed media)
 27h    BYTE    terminating null for volume label???
 28h    BYTE    device type (see #01561 at INT 21/AX=440Dh"DOS 3.2+")
 29h    WORD    bit flags describing drive (see #02604)
 2Bh    WORD    number of cylinders
 2Dh 19 BYTEs   BIOS Parameter Block for highest capacity supported
 40h  3 BYTEs   ???
 43h  9 BYTEs   filesystem type???, default = "NO NAME  "
                (apparently only MS-DOS 3.30 fixed media, nulls for removable
                  media and PC-DOS 3.30)
 4Ch    BYTE    least-significant byte of last-accessed cylinder number
---removable media---
 4Dh    DWORD   time of last access in clock ticks (FFFFFFFFh if never)
---fixed media---
 4Dh    WORD    partition (FFFFh = primary, 0001h = extended)
 4Fh    WORD    absolute cylinder number of partition's start on physical
                  drive (always FFFFh if primary partition)
SeeAlso: #02602,#02603

Format of COMPAQ DOS 3.31 drive data table:
Offset  Size    Description     (Table 02602)
 00h    DWORD   pointer to next table (offset FFFFh if last table)
 04h    BYTE    physical unit number (for INT 13)
 05h    BYTE    logical drive number (0=A:)
 06h 25 BYTEs   BIOS Parameter Block (see #02603)
 1Fh  6 BYTEs   reserved fields from BPB above???
 25h    BYTE    flags
                bit 6: 16-bit FAT instead of 12-bit FAT
                bit 5: large volume???
 26h    WORD    device-open count???
 28h 11 BYTEs   volume label or "NO NAME    " if none (always "NO NAME" for
                  fixed media)
 33h    BYTE    terminating null for volume label
 34h    BYTE    device type (see #01561 at INT 21/AX=440Dh"DOS 3.2+")
 35h    WORD    bit flags describing drive (see #02604)
 37h    WORD    number of cylinders
 39h 25 BYTEs   BIOS parameter block for highest capacity drive supports
 52h  6 BYTEs   ??? apparently always zeros
 58h    BYTE    least-significant byte of last-accessed cylinder number
---removable media---
 59h    DWORD   time of last access in clock ticks (FFFFFFFFh if never)
---fixed media---
 59h    WORD    partition (FFFFh = primary, 0001h = extended)
 5Bh    WORD    absolute cylinder number of partition's start on physical
                  drive (always FFFFh if primary partition)
SeeAlso: #02601,#02603

Format of DOS 4.0-7.0 drive data table:
Offset  Size    Description     (Table 02603)
 00h    DWORD   pointer to next table (offset FFFFh if last table)
 04h    BYTE    physical unit number (for INT 13)
 05h    BYTE    logical drive number (0=A:)
 06h 25 BYTEs   BIOS Parameter Block (see also INT 21/AH=53h)
                Offset  Size    Description
                 00h    WORD    bytes per sector
                 02h    BYTE    sectors per cluster, FFh if unknown
                 03h    WORD    number of reserved sectors
                 05h    BYTE    number of FATs
                 06h    WORD    number of root dir entries
                 08h    WORD    total sectors (refer to offset 15h if zero)
                 0Ah    BYTE    media descriptor, 00h if unknown
                 0Bh    WORD    sectors per FAT
                 0Dh    WORD    sectors per track
                 0Fh    WORD    number of heads
                 11h    DWORD   number of hidden sectors
                 15h    DWORD   total sectors if WORD at 08h is zero
 1Fh    BYTE    flags
                bit 6: 16-bit FAT instead of 12-bit
                bit 7: unsupportable disk (all accesses will return Not Ready)
 20h    WORD    device-open count
 22h    BYTE    device type (see #01561 at INT 21/AX=440Dh"DOS 3.2+")
 23h    WORD    bit flags describing drive (see #02604)
 25h    WORD    number of cylinders (for partition only, if hard disk)
 27h 25 BYTEs   BIOS Parameter Block for default (highest) capacity supported
 40h  6 BYTEs   reserved (part of BPB above)
 46h    BYTE    last track accessed
---removable media---
 47h    DWORD   time of last access in clock ticks (FFFFFFFFh if never)
---fixed media---
 47h    WORD    partition (FFFFh = primary, 0001h = extended)
                always 0001h for DOS 5+
 49h    WORD    absolute cylinder number of partition's start on physical drive
                (FFFFh if primary partition in DOS 4.x)
------
 4Bh 11 BYTEs   volume label or "NO NAME    " if none (apparently taken from
                  extended boot record rather than root directory)
 56h    BYTE    terminating null for volume label
 57h    DWORD   serial number
 5Bh  8 BYTEs   filesystem type ("FAT12   " or "FAT16   ")
 63h    BYTE    terminating null for filesystem type
SeeAlso: #02601,#02602

Bitfields for flags describing drive:
Bit(s)  Description     (Table 02604)
 0      fixed media
 1      door lock ("changeline") supported
 2      current BPB locked
 3      all sectors in a track are the same size
 4      physical drive has multiple logical units
 5      current logical drive for shared physical drive
 6      disk change detected
 7      device parameters were changed (set DASD before formatting)
        (see #01560 at INT 21/AX=440Dh"DOS 3.2+")
 8      disk reformatted (BPB of current media was changed)
 9      access flag (fixed media only, disables reads and writes)
        (see #01566 at INT 21/AX=440Dh"DOS 3.2+")
--------f-2F1000-----------------------------
INT 2F - SHARE - INSTALLATION CHECK
        AX = 1000h
Return: AL = status
            00h not installed, OK to install
            01h not installed, not OK to install
            FFh installed
BUGS:   values of AL other than 00h put DOS 3.x SHARE into an infinite loop
          (08E9: OR  AL,AL
           08EB: JNZ 08EB) <- the buggy instruction (DOS 3.3)
        values of AL other than described here put PC-DOS 4.00 into the same
          loop (the buggy instructions are the same)
Notes:  supported by OS/2 v1.3+ compatibility box, which always returns AL=FFh
        if DOS 4.01 SHARE was automatically loaded, file sharing is in an
          inactive state (due to the undocumented /NC flag used by the autoload
          code) until this call is made
        DOS 5+ chains to the previous handler if AL <> 00h on entry
        Windows Enhanced mode hooks this call and reports that SHARE is
          installed even when it is not
SeeAlso: AX=1080h,INT 21/AH=52h,INT 21/AX=4457h/DX=FFFFh
--------d-2F1001-----------------------------
INT 2F U - DR DOS 6.0 SHARE internal - SET ???
        AX = 1001h
        DX:BX -> ???function
Notes:  this function is also supported by SuperStor, a disk-compression
          program by Addstor which is bundled with DR DOS 6.0, and the
          Novell DOS 7 DELWATCH.EXE
        the default handler for the pointer set by this call under DELWATCH
          simply returns with CF set
SeeAlso: AX=1000h,AX=F800h
--------f-2F1040-----------------------------
INT 2F U - DOS 4 only SHARE internal - ???
        AX = 1040h
        ???
Return: AL = FFh???
SeeAlso: AX=1000h
--------f-2F1080-----------------------------
INT 2F U - DOS 4 only SHARE internal - TURN ON FILE SHARING CHECKS
        AX = 1080h
Return: AL = status
            F0h successful
            FFh checking was already on
Note:   DOS 4.x SHARE has dual functions: FCB support for large (>32M) media
          and file sharing checks.  The undocumented commandline flag /NC can
          be used to disable the sharing code.
SeeAlso: AX=1000h,AX=1081h
--------f-2F1081-----------------------------
INT 2F U - DOS 4 only SHARE internal - TURN OFF FILE SHARING CHECKS
        AX = 1081h
Return: AL = status
            F0h successful
            FFh checking was already off
Note:   (see AX=1080h)
SeeAlso: AX=1000h,AX=1080h
--------O-2F10FE-----------------------------
INT 2F U - Novell DOS 7 DELWATCH.EXE - INSTALLATION CHECK
        AX = 10FEh
Return: AX = 20FFh if installed and active
            DX:BX -> private entry point (see #02605)
SeeAlso: #01352,INT 21/AX=4306h,INT 21/AX=5704h

(Table 02605)
Call DELWATCH private entry point with:
        AH = function
            00h NOP???
                Return: AX = 0000h
                        CX = 0004h (unsupported function)
            01h disable DELWATCH on drive
                AL = drive number (00h = A:)
                Return: AX = status (0000h if failed, FFFFh if successful)
            02h ???
                AL = drive number (00h = A:)
                ???
                Return: ???
            03h ???
                AL = drive number (00h = A:)
                CX = ??? (0000h/0001h)
                ???
                Return: ???
            04h ???
                AL = drive number (00h = A:)
                ???
                Return: ???
            05h ???
                AL = drive number (00h = A:)
                ???
                Return: ???
            06h enable DELWATCH on drive
                AL = drive number with bit 7 set (80h = A:, etc.)
                BX = maximum files of same name in one directory to save
                CX = maximum files to save on this disk
                ???
                Return: AX = status
                            0000h failed
                            FFFFh successful
                        CX = error code on failure
                            (0004h if AL < 80h on entry)
            07h ???
            08h set file extensions list
                AL = sense (00h exclude named extensions, 01h only named ext.)
                DS:BX -> 31-byte ASCIZ extension list (three blank-padded bytes
                          per extension)
                Return: AX = FFFFh (successful)
            09h ???
                AL = drive number (00h = A:)
                ???
                Return: ???
            0Ah ???
                AL = drive number (00h = A:)
                ???
                Return: ???
            0Bh reset ???
                Return: AX = FFFFh (successful)
                see also function 0Dh
            0Ch check if drive enabled
                AL = drive number with bit 7 set (80h = A:, etc.)
                Return: AX = state
                            0000h disabled or error (check CX)
                            0001h drive enabled
                        CX = error code (0004h invalid drive number)
            0Dh set ???
                BX = ???
                Return: AX = FFFFh (successful)
                see also function 0Bh
            0Eh ???
                AL = drive number (00h = A:)
                ???
                Return: ???
Return: AX = 0000h, CX = 0001h if DELWATCH busy
        registers unchanged if AH >= 0Fh on entry
--------O-2F10FF-----------------------------
INT 2F U - Multiplex - DR DOS 5.0 - ???
        AX = 10FFh
        ES:BX -> ???
Note:   sets pointer in kernel
--------N-2F1100-----------------------------
INT 2F C - NETWORK REDIRECTOR - INSTALLATION CHECK
        AX = 1100h
Return: AL = status
            00h not installed, OK to install
            01h not installed, not OK to install
            FFh installed
                AH = product identifier (ad hoc by various manufacturers)
                    00h if PC Tools v8 DRIVEMAP
                    42h ('B') for Beame&Whiteside BWNFS v3.0a
                    6Eh ('n') for NetWare Lite v1.1 CLIENT
Notes:  this function is called by the DOS 3.1+ kernel
        in DOS 4.x only, the 11xx calls are all in IFSFUNC.EXE, not in the
          PC LAN Program redirector; DOS 5+ moves the calls back into the
          redirector
        the PC Network 1.00 redirector (renamed to PC LAN Program in 1.1-1.3)
          only supports AL=00h-27h
--------d-2F1100SFDADA-----------------------
INT 2F - MSCDEX (MS CD-ROM Extensions) - INSTALLATION CHECK
        AX = 1100h subfn DADAh
        STACK: WORD DADAh
Return: AL = status
            00h not installed, OK to install
                STACK unchanged
            01h not installed, not OK to install
                STACK unchanged
            FFh installed
                STACK: WORD     ADADh if MSCDEX installed
                                DADBh if Lotus CD/Networker installed
Note:   although MSCDEX sets the stack word to ADADh on return, any value other
          than DADAh is considered to mean that MSCDEX is already installed;
          Lotus CD/Networker v4+ uses this feature to fool MSCDEX into
          thinking it is already installed when it is in fact CD/Networker
          that is installed
Index:  installation check;Lotus CD/Networker
Index:  Lotus CD/Networker;installation check
--------N-2F1101-----------------------------
INT 2F CU - NETWORK REDIRECTOR - REMOVE REMOTE DIRECTORY
        AX = 1101h
        SS = DOS DS
        SDA first filename pointer -> fully-qualified directory name
        SDA CDS pointer -> current directory structure for drive with dir
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
Note:   this function is called by the DOS 3.1+ kernel
SeeAlso: AX=1103h,AX=1105h,INT 21/AH=3Ah,INT 21/AH=60h
--------N-2F1102-----------------------------
INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - REMOVE REMOTE DIRECTORY
        AX = 1102h
        SS = DOS DS
        SDA first filename pointer -> fully-qualified directory name
        SDA CDS pointer -> current directory structure for drive with dir
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
Note:   appears to be identical to AX=1101h; MS internal documentation calls
          this function "SEQ_RMDIR"
SeeAlso: AX=1101h
--------N-2F1103-----------------------------
INT 2F CU - NETWORK REDIRECTOR - MAKE REMOTE DIRECTORY
        AX = 1103h
        SS = DOS DS
        SDA first filename pointer -> fully-qualified directory name
        SDA CDS pointer -> current directory structure for drive with dir
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
Note:   this function is called by the DOS 3.1+ kernel
SeeAlso: AX=1101h,AX=1105h,INT 21/AH=39h,INT 21/AH=60h
--------N-2F1104-----------------------------
INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - MAKE REMOTE DIRECTORY
        AX = 1104h
        SS = DOS DS
        SDA first filename pointer -> fully-qualified directory name
        SDA CDS pointer -> current directory structure for drive with dir
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
Note:   appears to be identical to AX=1103h
SeeAlso: AX=1103h
--------N-2F1105-----------------------------
INT 2F CU - NETWORK REDIRECTOR - CHDIR
        AX = 1105h
        SS = DOS DS
        SDA first filename pointer -> fully-qualified directory name
        SDA CDS pointer -> current directory structure for drive with dir
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
            CDS updated with new path
Notes:  this function is called by the DOS 3.1+ kernel
        directory string in CDS should not have a terminating backslash unless
          the current directory is the root
SeeAlso: AX=1101h,AX=1103h,INT 21/AH=3Bh,INT 21/AH=60h
--------N-2F1106-----------------------------
INT 2F CU - NETWORK REDIRECTOR - CLOSE REMOTE FILE
        AX = 1106h
        ES:DI -> filled-in SFT (assumed to point at SDA's current SFT field)
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
            SFT updated (redirector must decrement open count, which may be
                  done with INT 2F/AX=1208h)
        ES:DI must be preserved
Note:   this function is called by the DOS 3.1+ kernel
SeeAlso: AX=1116h,AX=1201h,AX=1208h,AX=1227h,INT 21/AH=3Eh
--------N-2F1107-----------------------------
INT 2F CU - NETWORK REDIRECTOR - COMMIT REMOTE FILE
        AX = 1107h
        ES:DI -> filled-in SFT (assumed to point at SDA's current SFT field)
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
            all buffers for file flushed
            directory entry updated
        ES:DI must be preserved
Desc:   perform all the buffer flushing, directory updates, etc. that would be
          performed on a file close, but do not decrement the SFT reference
          count
Note:   this function is called by the DOS 3.1+ kernel
SeeAlso: INT 21/AH=68h,INT 21/AX=5D01h
--------N-2F1108-----------------------------
INT 2F CU - NETWORK REDIRECTOR - READ FROM REMOTE FILE
        AX = 1108h
        ES:DI -> SFT
            SFT DPB field -> DPB of drive containing file
        CX = number of bytes
        SS = DOS DS
        SDA DTA field -> user buffer
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
            CX = number of bytes read (0000h = end of file)
            SFT updated
Note:   this function is called by the DOS 3.1+ kernel
SeeAlso: AX=1109h,AX=1229h,INT 21/AH=3Fh"DOS",INT 21/AX=5D06h
--------N-2F1109-----------------------------
INT 2F CU - NETWORK REDIRECTOR - WRITE TO REMOTE FILE
        AX = 1109h
        ES:DI -> SFT
            SFT DPB field -> DPB of drive containing file
        CX = number of bytes
        SS = DOS DS
        SDA DTA field -> user buffer
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
            CX = number of bytes written
            SFT updated
Notes:  this function is called by the DOS 3.1+ kernel
        PrintCache v3.1 PCACHE.EXE intercepts this function for SFTs where
          the Device Driver Header field points at PCACHE, but does not
          intercept any other network redirector functions
SeeAlso: AX=1107h,AX=1108h,INT 21/AH=40h,INT 21/AX=5D06h
--------N-2F110A-----------------------------
INT 2F CU - NETWORK REDIRECTOR (DOS 3.x only) - LOCK REGION OF FILE
        AX = 110Ah
        BX = file handle
        CX:DX = starting offset
        SI = high word of size
        STACK: WORD low word of size
        ES:DI -> SFT
            SFT DPB field -> DPB of drive containing file
        SS = DOS DS
Return: CF set on error
           AL = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        STACK unchanged
Notes:  this function is called by the DOS 3.10-3.31 kernel
        the redirector is expected to resolve lock conflicts
SeeAlso: AX=110Bh,INT 21/AH=5Ch
--------N-2F110A-----------------------------
INT 2F CU - NETWORK REDIRECTOR (DOS 4.0+) - LOCK/UNLOCK REGION OF FILE
        AX = 110Ah
        BL = function
            00h lock
            01h unlock
        CX = number of lock/unlock parameters (0001h for DOS 4.0-6.1)
        DS:DX -> parameter block (see #02606)
        ES:DI -> SFT
            SFT DPB field -> DPB of drive containing file
        SS = DOS DS
Return: CF set on error
           AL = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
Notes:  this function is called by the DOS 4.0+ kernel
        the redirector is expected to resolve lock conflicts
SeeAlso: AX=110Bh,INT 21/AH=5Ch

Format of parameter block entry [array, but currently limited to single entry]:
Offset  Size    Description     (Table 02606)
 00h    DWORD   start offset
 04h    DWORD   size of region
--------N-2F110B-----------------------------
INT 2F CU - NETWORK REDIRECTOR (DOS 3.x only) - UNLOCK REGION OF FILE
        AX = 110Bh
        BX = file handle
        CX:DX = starting offset
        SI = high word of size
        STACK: WORD low word of size
        ES:DI -> SFT for file
            SFT DPB field -> DPB of drive containing file
Return: CF set on error
           AL = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        STACK unchanged
Note:   this function is called by the DOS 3.1-3.31 kernel; DOS 4.0+ calls
          AX=110Ah instead
SeeAlso: AX=110Ah,INT 21/AH=5Ch
--------N-2F110C-----------------------------
INT 2F CU - NETWORK REDIRECTOR - GET DISK INFORMATION
        AX = 110Ch
        ES:DI -> current directory structure for desired drive
Return: CF clear if data valid
            AL = sectors per cluster
            AH = media ID byte
            BX = total clusters
            CX = bytes per sector
            DX = number of available clusters
        CF set if data invalid
Note:   this function is called by the DOS 3.1+ kernel
SeeAlso: INT 21/AH=36h
--------N-2F110D-----------------------------
INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - SET REMOTE FILE'S ATTRIBUTES
        AX = 110Dh
        SDA first filename pointer -> name of file
        ???
Return: ???
Note:   similar to AX=110Eh
SeeAlso: AX=110Eh
--------N-2F110E-----------------------------
INT 2F CU - NETWORK REDIRECTOR - SET REMOTE FILE'S ATTRIBUTES
        AX = 110Eh
        SS = DOS DS
        SDA first filename pointer -> fully-qualified name of file
        SDA CDS pointer -> current directory structure for drive with file
        STACK: WORD new file attributes
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
        STACK unchanged
Note:   this function is called by the DOS 3.1+ kernel
SeeAlso: AX=110Dh,AX=110Fh,INT 21/AX=4301h,INT 21/AH=60h
--------N-2F110F-----------------------------
INT 2F CU - NETWORK REDIRECTOR - GET REMOTE FILE'S ATTRIBUTES AND SIZE
        AX = 110Fh
        SS = DOS DS
        SDA first filename pointer -> fully-qualified name of file
        SDA CDS pointer -> current directory structure for drive with file
                (offset = FFFFh if null CDS [net direct request])
        SDA search attributes = mask of attributes which may be included in
                  search for file
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
            AX = file attributes
            BX:DI = file size
            CX = time stamp of file
            DX = date stamp of file
Notes:  this function is called by the DOS 3.1+ kernel
        wildcards and device names are not permitted
SeeAlso: AX=110Eh,INT 21/AX=4300h,INT 21/AH=60h
--------N-2F1110-----------------------------
INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - GET REMOTE FILE'S ATTRIBUTES AND SIZE
        AX = 1110h
        SDA first filename pointer -> name of file
        ???
Return: ???
Note:   appears to be similar to AX=110Fh
SeeAlso: AX=110Eh
--------N-2F1111-----------------------------
INT 2F CU - NETWORK REDIRECTOR - RENAME REMOTE FILE
        AX = 1111h
        SS = DS = DOS DS
        SDA first filename pointer = offset of fully-qualified old name
        SDA second filename pointer = offset of fully-qualified new name
        SDA CDS pointer -> current directory structure for drive with file
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
Note:   this function is called by the DOS 3.1+ kernel
SeeAlso: AX=1112h,INT 21/AH=56h,INT 21/AH=60h
--------N-2F1112-----------------------------
INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - RENAME REMOTE FILE
        AX = 1112h
        SS = DS = DOS DS
        SDA first filename pointer -> name of file
        ???
Return: ???
Note:   similar to AX=1111h
SeeAlso: AX=1111h
--------N-2F1113-----------------------------
INT 2F CU - NETWORK REDIRECTOR - DELETE REMOTE FILE
        AX = 1113h
        SS = DS = DOS DS
        SDA first filename pointer -> fully-qualified filename in DOS DS
        SDA CDS pointer -> current directory structure for drive with file
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
Notes:  this function is called by the DOS 3.1+ kernel
        the filespec may contain wildcards
SeeAlso: AX=1114h,INT 21/AH=41h,INT 21/AH=60h
--------N-2F1114-----------------------------
INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - DELETE REMOTE FILE
        AX = 1114h
        SDA first filename pointer -> name of file
        ???
Return: ???
Note:   similar to AX=1113h
SeeAlso: AX=1113h
--------N-2F1115-----------------------------
INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - OPEN REMOTE FILE
        AX = 1115h
        SS = DOS DS
        ES:DI -> SFT ???
        ???
Return: ???
Note:   similar to AX=1116h
SeeAlso: AX=1116h,AX=112Eh
--------N-2F1116-----------------------------
INT 2F CU - NETWORK REDIRECTOR - OPEN EXISTING REMOTE FILE
        AX = 1116h
        ES:DI -> uninitialized SFT
        SS = DOS DS
        SDA first filename pointer -> fully-qualified name of file to open
        STACK: WORD file access and sharing modes (see #01402 at INT 21/AH=3Dh)
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
            SFT filled (except handle count, which DOS manages itself)
        STACK unchanged
Note:   this function is called by the DOS 3.1+ kernel
SeeAlso: AX=1106h,AX=1115h,AX=1117h,AX=1118h,AX=112Eh,INT 21/AH=3Dh
SeeAlso: INT 21/AH=60h
--------N-2F1117-----------------------------
INT 2F CU - NETWORK REDIRECTOR - CREATE/TRUNCATE REMOTE FILE
        AX = 1117h
        ES:DI -> uninitialized SFT
        SS = DOS DS
        SDA first filename pointer -> fully-qualified name of file to open
        SDA CDS pointer -> current directory structure for drive with file
        STACK: WORD file creation mode
                        low byte = file attributes (see #01401 at INT 21/AH=3Ch)
                        high byte = 00h normal create, 01h create new file
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
            SFT filled (except handle count, which DOS manages itself)
        STACK unchanged
Note:   this function is called by the DOS 3.1+ kernel
SeeAlso: AX=1106h,AX=1116h,AX=1118h,AX=112Eh,INT 21/AH=3Ch,INT 21/AH=60h
--------N-2F1118-----------------------------
INT 2F CU - NETWORK REDIRECTOR - CREATE/TRUNCATE FILE WITHOUT CDS
        AX = 1118h
        ES:DI -> uninitialized SFT
        SS = DOS DS
        SDA first filename pointer -> fully-qualified name of file
        STACK: WORD file creation mode
                        low byte = file attributes
                        high byte = 00h normal create, 01h create new file
Return: ???
        STACK unchanged
Note:   this function is called by the DOS 3.1+ kernel when creating a file
          on a drive for which the SDA CDS pointer has offset FFFFh
SeeAlso: AX=1106h,AX=1116h,AX=1117h,AX=112Eh,INT 21/AH=60h
--------N-2F1119-----------------------------
INT 2F CU - NETWORK REDIRECTOR - FIND FIRST FILE WITHOUT CDS
        AX = 1119h
        SS = DS = DOS DS
        [DTA] = uninitialized 21-byte findfirst search data
              (see #01626 at INT 21/AH=4Eh)
        SDA first filename pointer -> fully-qualified search template
        SDA search attribute = attribute mask for search
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
            [DTA] = updated findfirst search data
                    (bit 7 of first byte must be set)
            [DTA+15h] = standard directory entry for file (see #01352)
Notes:  this function is called by the DOS 3.1+ kernel
        DOS 4.x IFSFUNC returns CF set, AX=0003h
SeeAlso: AX=111Ah,AX=111Bh,INT 21/AH=1Ah
--------N-2F111A-----------------------------
INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - FIND NEXT FILE WITHOUT CDS
        AX = 111Ah
        ???
Return: CF set
            AX = error code (03h for DOS 4.01 IFSFUNC)
Note:   use AX=111Ch for DOS 5+
SeeAlso: AX=1119h,AX=111Ch
--------N-2F111B-----------------------------
INT 2F CU - NETWORK REDIRECTOR - FINDFIRST
        AX = 111Bh
        SS = DS = DOS DS
        [DTA] = uninitialized 21-byte findfirst search data
              (see #01626 at INT 21/AH=4Eh)
        SDA first filename pointer -> fully-qualified search template
        SDA CDS pointer -> current directory structure for drive with file
        SDA search attribute = attribute mask for search
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
            [DTA] = updated findfirst search data
                    (bit 7 of first byte must be set)
            [DTA+15h] = standard directory entry for file (see #01352)
Note:   this function is called by the DOS 3.1+ kernel
SeeAlso: AX=1119h,AX=111Ch,INT 21/AH=1Ah,INT 21/AH=4Eh,INT 21/AH=60h
--------N-2F111C-----------------------------
INT 2F CU - NETWORK REDIRECTOR - FINDNEXT
        AX = 111Ch
        SS = DS = DOS DS
        ES:DI -> CDS
        ES:DI -> DTA (MSDOS v5.0)
        [DTA] = 21-byte findfirst search data
              (see #01626 at INT 21/AH=4Eh)
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
            [DTA] = updated findfirst search data
                    (bit 7 of first byte must be set)
            [DTA+15h] = standard directory entry for file (see #01352)
Note:   this function is called by the DOS 3.1+ kernel
SeeAlso: AX=1119h,AX=111Bh,INT 21/AH=1Ah,INT 21/AH=4Fh
--------N-2F111D-----------------------------
INT 2F CU - NETWORK REDIRECTOR - CLOSE ALL REMOTE FILES FOR PROCESS (ABORT)
        AX = 111Dh
        SS = DOS DS
        SDA PSP segment field = PSP of terminating process
Return: nothing
Notes:  used when a process is aborted; the process being terminated is
          indicated by the "sharing PSP" field in the SDA (offset 1Ah/1Ch)
        this function is called by the DOS 3.1+ kernel
        closes all FCBs opened by process
SeeAlso: INT 21/AX=5D04h
--------N-2F111E-----------------------------
INT 2F CU - NETWORK REDIRECTOR - DO REDIRECTION
        AX = 111Eh
        SS = DOS DS
        STACK: WORD function to execute
                5F00h  get redirection mode
                        BL = type (03h printer, 04h disk)
                        Return: BH = state (00h off, 01h on)
                5F01h  set redirection mode
                        BL = type (03h printer, 04h disk)
                        BH = state (00h off, 01h on)
                5F02h  get redirection list entry
                        BX = redirection list index
                        DS:SI -> 16-byte local device name buffer
                        ES:DI -> 128-byte network name buffer
                        Return: must set user's BX to device type and CX to
                                stored parameter value, using AX=1218h to get
                                stack frame address
                5F03h  redirect device
                        BL = device type (see INT 21/AX=5F03h)
                        CX = stored parameter value
                        DS:SI -> ASCIZ source device name
                        ES:DI -> destination ASCIZ network path + ASCIZ passwd
                5F04h  cancel redirection
                        DS:SI -> ASCIZ device name or network path
                5F05h  get redirection list extended entry
                        BX = redirection list index
                        DS:SI -> buffer for ASCIZ source device name
                        ES:DI -> buffer for destination ASCIZ network path
                        Return: BH = status flag
                                BL = type (03h printer, 04h disk)
                                CX = stored parameter value
                                BP = NETBIOS local session number
                5F06h  similar to 5F05h???
Return: CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
        STACK unchanged
Notes:  this function is called by the DOS 3.1+ kernel on INT 21/AH=5Fh
          (including LAN Manager calls)
        the PC Network 1.00 redirector does not support function 5F06h
SeeAlso: INT 21/AX=5F00h,INT 21/AX=5F01h,INT 21/AX=5F02h,INT 21/AX=5F03h
SeeAlso: INT 21/AX=5F04h,INT 21/AX=5F05h,INT 21/AX=5F06h
--------N-2F111F-----------------------------
INT 2F CU - NETWORK REDIRECTOR - PRINTER SETUP
        AX = 111Fh
        STACK: WORD function
                5E02h  set printer setup
                5E03h  get printer setup
                5E04h  set printer mode
                5E05h  get printer mode
Return: CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
        STACK unchanged
Note:   this function is called by the DOS 3.1+ kernel
SeeAlso: INT 21/AX=5E02h,INT 21/AX=5E03h,INT 21/AX=5E04h,INT 21/AX=5E05h
--------N-2F1120-----------------------------
INT 2F CU - NETWORK REDIRECTOR - FLUSH ALL DISK BUFFERS
        AX = 1120h
        DS = DOS DS
        ???
Return: CF clear (successful)
Notes:  this function is called by the DOS 3.1+ kernel
        uses CDS array pointer and LASTDRIVE= entries in DOS list of lists
SeeAlso: INT 21/AH=0Dh,INT 21/AX=5D01h
--------N-2F1121-----------------------------
INT 2F CU - NETWORK REDIRECTOR - SEEK FROM END OF REMOTE FILE
        AX = 1121h
        CX:DX = offset (in bytes) from end
        ES:DI -> SFT
            SFT DPB field -> DPB of drive with file
        SS = DOS DS
Return: CF set on error
            AL = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
            DX:AX = new file position
Note:   this function is called by the DOS 3.1+ kernel, but only when seeking
          from the end of a file opened with sharing modes set in such a
          manner that another process is able to change the size of the file
          while it is already open
SeeAlso: AX=1228h,INT 21/AH=42h
--------N-2F1122-----------------------------
INT 2F CU - NETWORK REDIRECTOR - PROCESS TERMINATION HOOK
        AX = 1122h
        SS = DOS DS
        DS = PSP of process about to terminate
Return: ???
Notes:  this function is called by the DOS 3.1+ kernel
        after calling this function, the kernel calls INT 2F/AX=111Dh
SeeAlso: AX=111Dh,INT 21/AH=4Ch,INT 60/DI=0601h
--------N-2F1123-----------------------------
INT 2F CU - NETWORK REDIRECTOR - QUALIFY REMOTE FILENAME
        AX = 1123h
        DS:SI -> ASCIZ filename to canonicalize
        ES:DI -> 128-byte buffer for qualified name
Return: CF set if not resolved
Notes:  called by MS-DOS 3.1+ kernel, but not called by DR DOS 5.0 unless the
          filename matches the name of a character device
        called first when DOS attempts to resolve a filename (unless inside an
          AX=5D00h server call); if this fails, DOS resolves the name locally
SeeAlso: AX=1221h,INT 21/AH=60h
--------N-2F1124-----------------------------
INT 2F CU - NETWORK REDIRECTOR - TURN OFF REMOTE PRINTER
        AX = 1124h
        ES:DI -> SFT
        SS = DOS DS
        ???
Return: CX = ???
Note:   this function is called by the DOS 3.1+ kernel if AX=1126h
          returns CF set
SeeAlso: AX=1126h
--------N-2F1125-----------------------------
INT 2F CU - NETWORK REDIRECTOR - REDIRECTED PRINTER MODE
        AX = 1125h
        STACK: WORD subfunction
                5D07h get print stream state
                        Return: DL = current state
                5D08h set print stream state
                        DL = new state
                5D09h finish print job
Return: CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
        STACK unchanged
Note:   this function is called by the DOS 3.1+ kernel
SeeAlso: INT 21/AX=5D07h,INT 21/AX=5D08h,INT 21/AX=5D09h
--------N-2F1126-----------------------------
INT 2F CU - NETWORK REDIRECTOR - REMOTE PRINTER ECHO ON/OFF
        AX = 1126h
        ES:DI -> SFT for file handle 4???
        SS = DOS DS???
        ???
Return: CF set on error
Notes:  this function is called by the DOS 3.1+ kernel
        called when print echoing (^P, ^PrtSc) changes state and STDPRN has
          bit 11 of the device information word in the SFT set
SeeAlso: AX=1124h
--------N-2F1127-----------------------------
INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - UNUSED
        AX = 1127h
Return: CF set
            AX = 0001h (invalid function) (see #01680 at INT 21/AH=59h/BX=0000h)
--------N-2F1127BX4E57-----------------------
INT 2F - NetWare 4.0 - REMOTE FILE COPY
        AX = 1127h
        BX = 4E57h ('NW') (signature identifying this as a NetWare call)
        SI = source file handle
        DI = destination file handle
        DX:CX = number of bytes to copy, starting at current file position
Return: CF clear if successful
        CF set on error
            AX = error code (05h,06h,0Bh,11h,3Bh) (see #01680)
        DX:CX = number of bytes successfully copied (file position updated)
Notes:  this is the only call which may be made directly to the NetWare
          redirector from an application
        COMMAND.COM's COPY and DOS's XCOPY reportedly call INT 21/AX=1127h in
          order to speed up copies between files on the same network server;
          if error code 11h (not same device) is returned, the copy is
          performed in the usual manner.  However, no such calls appear to
          be present in MS-DOS 6.22.
--------N-2F1128-----------------------------
INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - UNUSED
        AX = 1128h
Return: CF set
            AX = 0001h (invalid function) (see #01680 at INT 21/AH=59h/BX=0000h)
--------N-2F1129-----------------------------
INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - UNUSED
        AX = 1129h
Return: CF set
            AX = 0001h (invalid function) (see #01680 at INT 21/AH=59h/BX=0000h)
--------N-2F112A-----------------------------
INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - CLOSE ALL FILES FOR PROCESS
        AX = 112Ah
        DS = DOS DS
        ???
Return: ???
Note:   does something to each IFS driver
--------N-2F112B-----------------------------
INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - GENERIC IOCTL
        AX = 112Bh
        SS = DOS DS
        CX = function/category
        DS:DX -> parameter block
        STACK: WORD value of AX on entry to INT 21 (440Ch or 440Dh)
        ???
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
Note:   this function is called by the DOS 4.0 kernel
--------N-2F112C-----------------------------
INT 2F CU - NETWORK REDIRECTOR (DOS 4.0+) - "UPDATE_CB" - ???
        AX = 112Ch
        SS = DOS DS
        SDA current SFT pointer -> SFT for file
        ???
Return: CF set on error
Note:   called by SHARE in DOS 5.0-6.0
--------N-2F112D-----------------------------
INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - EXTENDED ATTRIBUTES
        AX = 112Dh
        BL = subfunction (value of AL on INT 21)
            02h get extended attributes
            03h get extended attribute properties
            04h set extended attributes
                Return: CF clear
            else ???
                Return: CX = ??? (00h or 02h for DOS 4.01)
        ES:DI -> SFT for file
        SS = DOS DS
Return: DS = DOS DS
Note:   this function is called by the DOS 4.0 kernel on INT 21/AX=5702h,
          INT 21/AX=5703h, and INT 21/AX=5704h
SeeAlso: INT 21/AX=5702h,INT 21/AX=5703h,INT 21/AX=5704h,INT 21/AH=6Eh
--------N-2F112E-----------------------------
INT 2F CU - NETWORK REDIRECTOR (DOS 4.0+) - EXTENDED OPEN/CREATE FILE
        AX = 112Eh
        SS = DS = DOS DS
        ES:DI -> uninitialized SFT for file
        STACK: WORD file attribute for created/truncated file
                        low byte = file attributes
                        high byte = 00h normal create/open, 01h create new file
        SDA first filename pointer -> fully-qualified filename
        SDA extended file open action = action code
              (see #01770 at INT 21/AX=6C00h)
        SDA extended file open mode = open mode for file (see INT 21/AX=6C00h)
Return: CF set on error
            AX = error code
        CF clear if successful
            CX = result code
                01h file opened
                02h file created
                03h file replaced (truncated)
            SFT initialized (except handle count, which DOS manages itself)
Note:   this function is called by the DOS 4.0+ kernel
BUG:    this function is not called correctly under some DOS versions
          (at least 5.0 and 6.2):
            the file attribute on the stack is not correct if the action
              code is 11h,
            the result code in CX is not passed back to the application.
SeeAlso: AX=1115h,AX=1116h,AX=1117h,INT 21/AX=6C00h
--------N-2F112F-----------------------------
INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - IFS IOCTL
        AX = 112Fh
        SS = DOS DS
        STACK: WORD function in low byte
                00h ???
                    DS:SI -> Current Directory Structure???
                    CL = drive (1=A:)
                01h ???
                    DS:SI -> ???
                    CL = file handle???
                02h ???
                    DS:SI -> Current Directory Structure???
                    DI = ???
                    CX = drive (1=A:)
        ???
Return: CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
Note:   this function is called by the DOS 4.0 kernel
SeeAlso: INT 21/AH=6Bh
--------N-2F1130-----------------------------
INT 2F CU - IFSFUNC.EXE (DOS 4.x only) - GET IFSFUNC SEGMENT
        AX = 1130h
Return: ES = CS of resident IFSFUNC
--------N-2F1180-----------------------------
INT 2F - LAN Manager Enhanced DOS Services - ???
        AX = 1180h
        ???
Return: ???
SeeAlso: AX=1100h,AX=1181h,AX=118Eh
--------N-2F1181-----------------------------
INT 2F - LAN Manager Enhanced DOS Services - SET USER NAME???
        AX = 1181h
        ???
Return: ???
SeeAlso: AX=1100h,AX=1180h
--------N-2F1182-----------------------------
INT 2F - LAN Manager Enhanced DOS Services - INSTALL SERVICE
        AX = 1182h
        ???
Return: ???
SeeAlso: AX=1100h,AX=1180h
--------N-2F1184-----------------------------
INT 2F - LAN Manager Enhanced DOS - ???
        AX = 1184h
        ???
Return: ???
--------N-2F1186-----------------------------
INT 2F - LAN Manager Enhanced DOS - DosReadAsynchNmPipe
        AX = 1186h
        DS:SI -> stack frame (see #02607)
Return: CF clear if successful
        CF set if error
            AX = error code
Note:   LAN Manager enhance mode adds features beyond the standard redirector
          file/printer services
SeeAlso: AX=118Fh,AX=1190h,AX=1191h,INT 21/AX=5F39h

Format of LAN Manager DosReadAsynchNmPipe stack frame:
Offset  Size    Description     (Table 02607)
 00h    DWORD   -> number of bytes read
 04h    WORD    size of buffer
 06h    DWORD   -> buffer
 0Ah    DWORD   -> return code
 0Eh    DWORD   function to call on completion as function( char far *buffer )
 12h    WORD    handle
--------N-2F118A-----------------------------
INT 2F - LAN Manager 2.0+ DOS Enhanced ENCRYPT.EXE - STREAM ENCRYPTION SERVICE
        AX = 118Ah
        BX = function (0000h or 0001h)
Return: CF clear if successful
            AX = 1100h success
        CF set if error
            AX = 0001h, etc.
SeeAlso: AX=1186h,AH=41h,AH=42h,AH=4Bh
--------N-2F118B-----------------------------
INT 2F - LAN Manager Enhanced DOS - ???
        AX = 118Bh
        ???
Return: ???
--------N-2F118C-----------------------------
INT 2F - LAN Manager Enhanced DOS - ???
        AX = 118Ch
        ???
Return: ???
--------N-2F118E-----------------------------
INT 2F - LAN Manager Enhanced DOS - ???
        AX = 118Eh
        ???
Return: ???
--------N-2F118F-----------------------------
INT 2F - LAN Manager Enhanced DOS - DosWriteAsynchNmPipe
        AX = 118Fh
        DS:SI -> stack frame (see #02608)
Return: CF clear if successful
        CF set if error
            AX = error code
SeeAlso: AX=1186h,AX=1191h,INT 21/AX=5F3Ah

Format of LAN Manager DosReadAsynchNmPipe stack frame:
Offset  Size    Description     (Table 02608)
 00h    DWORD   -> number of bytes read
 04h    WORD    Size of buffer
 06h    DWORD   -> buffer
 0Ah    DWORD   -> return code
 0Eh    DWORD   function to call on completion as function( char far *buffer )
 12h    WORD    handle
--------N-2F1190-----------------------------
INT 2F - LAN Manager Enhanced DOS - DosReadAsynchNmPipe2
        AX = 1190h
        DS:SI -> stack frame (see #02609)
Return: CF clear if successful
        CF set if error
            AX = error code
SeeAlso: AX=1186h,AX=1191h

Format of LAN Manager DosReadAsynchNmPipe2 stack frame:
Offset  Size    Description     (Table 02609)
 00h    DWORD   -> number of bytes read
 04h    WORD    size of buffer
 06h    DWORD   -> buffer
 0Ah    DWORD   -> return code
 0Eh    DWORD   function to call on completion as function( char far *buffer )
 12h    WORD    handle
 14h    DWORD   ???
--------N-2F1191-----------------------------
INT 2F - LAN Manager Enhanced DOS - DosWriteAsynchNmPipe2
        AX = 1191h
        DS:SI -> stack frame (see #02610)
Return: CF clear if successful
        CF set if error
            AX = error code
SeeAlso: AX=118Fh,AX=1190h,INT 21/AX=5F3Ah

Format of LAN Manager DosReadAsynchNmPipe2 stack frame:
Offset  Size    Description     (Table 02610)
 00h    DWORD   -> number of bytes read
 04h    WORD    size of buffer
 06h    DWORD   -> buffer
 0Ah    DWORD   -> return code
 0Eh    DWORD   function to call on completion as function( char far *buffer )
 12h    WORD    handle
 14h    DWORD   ???
--------D-2F1200-----------------------------
INT 2F U - DOS 3.0+ internal - INSTALLATION CHECK
        AX = 1200h
Return: AL = FFh (for compatibility with other INT 2F functions)
--------D-2F1201-----------------------------
INT 2F U - DOS 3.0+ internal - CLOSE CURRENT FILE
        AX = 1201h
        SS = DOS DS = DOS kernel data seg (must be using a DOS internal stack)
        SDA current SFT pointer -> SFT of file to close
Return: CF set on error
        ES:DI -> SFT for file
        CX undefined (new reference count of SFT in many versions)
        BX destroyed
SeeAlso: AX=1106h,AX=1227h,INT 21/AH=3Eh
--------D-2F1202-----------------------------
INT 2F U - DOS 3.0+ internal - GET INTERRUPT ADDRESS
        AX = 1202h
        STACK: WORD vector number
Return: ES:BX -> interrupt vector (DWORD containing handler's address)
        STACK unchanged
--------D-2F1203-----------------------------
INT 2F U - DOS 3.0+ internal - GET DOS DATA SEGMENT
        AX = 1203h
Return: DS = data segment of IBMDOS.COM/MSDOS.SYS
Note:   for DOS prior to version 5.0, the data segment is the same as the code
          segment
--------D-2F1204-----------------------------
INT 2F U - DOS 3.0+ internal - NORMALIZE PATH SEPARATOR
        AX = 1204h
        STACK: WORD character to normalize
Return: AL = normalized character (forward slash turned to backslash, all
                  others unchanged)
        ZF set if path separator
        STACK unchanged
--------D-2F1205-----------------------------
INT 2F U - DOS 3.0+ internal - OUTPUT CHARACTER TO STANDARD OUTPUT
        AX = 1205h
        STACK: WORD character to output
Return: STACK unchanged
Note:   can be called only from within DOS
--------D-2F1206-----------------------------
INT 2F U - DOS 3.0+ internal - INVOKE CRITICAL ERROR
        AX = 1206h
        DI = error code
        BP:SI -> device driver header (see #01646)
        SS = DOS DS (must be using a DOS internal stack)
        STACK: WORD value to be passed to INT 24 in AX
Return: AL = 0-3 for Abort, Retry, Ignore, Fail
        STACK unchanged
SeeAlso: INT 24
--------D-2F1207-----------------------------
INT 2F U - DOS 3.0+ internal - MAKE DISK BUFFER MOST-RECENTLY USED
        AX = 1207h
        DS:DI -> disk buffer
Return: nothing
Desc:   move the indicated buffer to the end of the disk buffer chain (least-
          recently used is first); under DOS 3.3, the buffer is then moved to
          the start of the disk buffer chain if it was marked unused
Notes:  can be called only from within DOS
        this function is nearly the same as AX=120Fh
SeeAlso: AX=120Fh
--------D-2F1208-----------------------------
INT 2F U - DOS 3.0+ internal - DECREMENT SFT REFERENCE COUNT
        AX = 1208h
        ES:DI -> SFT
Return: AX = original value of reference count
Notes:  if the reference count was 1, it is set to FFFFh ("busy", since 0
          indicates that the SFT is not in use).  It is the caller's
          responsibility to set the reference count to zero after cleaning up.
        used by network redirectors such as MSCDEX
SeeAlso: AX=1106h
--------D-2F1209-----------------------------
INT 2F U - DOS 3.0+ internal - FLUSH AND FREE DISK BUFFER
        AX = 1209h
        DS:DI -> disk buffer
Return: disk buffer marked unused, contents written to disk if buffer dirty
Note:   can be called only from within DOS
SeeAlso: AX=120Eh,AX=1215h
--------D-2F120A-----------------------------
INT 2F U - DOS 3.0+ internal - PERFORM CRITICAL ERROR INTERRUPT
        AX = 120Ah
        DS = SS = DOS DS (must be using a DOS internal stack)
        STACK: WORD extended error code
Return: AL = user response (0=ignore, 1=retry, 2=abort, 3=fail)
        CF clear if retry, set otherwise
        STACK unchanged
Notes:  can only be called during a DOS function call, as it uses various
          fields in the SDA to set up the registers for the INT 24
        reportedly sets current DPB's first root directory sector to 1
SeeAlso: INT 24
--------D-2F120B-----------------------------
INT 2F U - DOS 3.0+ internal - SIGNAL SHARING VIOLATION TO USER
        AX = 120Bh
        ES:DI -> system file table entry for previous open of file
        STACK: WORD extended error code (should be 20h--sharing violation)
Return: CF clear if operation should be retried
        CF set if operation should not be retried
            AX = error code (20h) (see #01680 at INT 21/AH=59h/BX=0000h)
        STACK unchanged
Notes:  can only be called during a DOS function call
        should only be called if an attempt was made to open an already-open
          file contrary to the sharing rules
        invokes INT 24 if SFT file opened via FCB or in compatibility mode with
          inheritance allowed
--------D-2F120C-----------------------------
INT 2F U - DOS 3.0+ internal - OPEN DEVICE AND SET SFT OWNER/MODE
        AX = 120Ch
        SDA current SFT pointer -> SFT for file
        DS = DOS DS
        SS = DOS DS (must be using a DOS internal stack)
Return: ES, DI, AX destroyed
Notes:  invokes "device open" call on device driver for SFT
        changes owner of last-accessed SFT to calling process if it was opened
          via FCB
        called by network redirectors such as MSCDEX
--------D-2F120D-----------------------------
INT 2F U - DOS 3.0+ internal - GET DATE AND TIME
        AX = 120Dh
        SS = DOS DS (must be using a DOS internal stack)
Return: AX = current date in packed format (see #01666 at INT 21/AX=5700h)
        DX = current time in packed format (see #01665 at INT 21/AX=5700h)
SeeAlso: INT 21/AH=2Ah,INT 21/AH=2Ch
--------D-2F120E-----------------------------
INT 2F U - DOS 3.0+ internal - MARK ALL DISK BUFFERS UNREFERENCED
        AX = 120Eh
        SS = DOS DS (must be using a DOS internal stack)
Return: DS:DI -> first disk buffer
Notes:  clears "referenced" flag on all disk buffers
        in DOS 5+, this has become essentially a NOP, invoking the same code
          used by AX=1224h (SHARING DELAY)
SeeAlso: AX=1209h,AX=1210h,INT 21/AH=0Dh
--------D-2F120F-----------------------------
INT 2F U - DOS 3.0+ internal - MAKE BUFFER MOST RECENTLY USED
        AX = 120Fh
        DS:DI -> disk buffer
        SS = DOS DS (must be using a DOS internal stack)
Return: DS:DI -> next buffer in buffer list
Desc:   move the indicated buffer to the end of the disk buffer chain (least-
          recently used is first); under DOS 3.3, the buffer is then moved to
          the start of the disk buffer chain if it was marked unused
Note:   this function is the same as AX=1207h except that it returns a
          pointer to the buffer following the specified buffer in the buffer
          chain
SeeAlso: AX=1207h
--------D-2F1210-----------------------------
INT 2F U - DOS 3.0+ internal - FIND UNREFERENCED DISK BUFFER
        AX = 1210h
        DS:DI -> first disk buffer to check
Return: ZF clear if found
            DS:DI -> first unreferenced disk buffer
        ZF set if not found
Note:   in DOS 5+, this has become essentially a NOP, invoking the same code
          used by AX=1224h (SHARING DELAY)
SeeAlso: AX=120Eh
--------D-2F1211-----------------------------
INT 2F U - DOS 3.0+ internal - NORMALIZE ASCIZ FILENAME
        AX = 1211h
        DS:SI -> ASCIZ filename to normalize
        ES:DI -> buffer for normalized filename
Return: destination buffer filled with uppercase filename, with slashes turned
        to backslashes
SeeAlso: AX=121Eh,AX=1221h
--------D-2F1212-----------------------------
INT 2F U - DOS 3.0+ internal - GET LENGTH OF ASCIZ STRING
        AX = 1212h
        ES:DI -> ASCIZ string
Return: CX = length of string
SeeAlso: AX=1225h
--------D-2F1213-----------------------------
INT 2F U - DOS 3.0+ internal - UPPERCASE CHARACTER
        AX = 1213h
        STACK: WORD character to convert to uppercase
Return: AL = uppercase character
        STACK unchanged
--------D-2F1214-----------------------------
INT 2F U - DOS 3.0+ internal - COMPARE FAR POINTERS
        AX = 1214h
        DS:SI = first pointer
        ES:DI = second pointer
Return: ZF set if pointers are equal, ZF clear if not equal
        CF clear if pointers equal, CF set if not
--------D-2F1215-----------------------------
INT 2F U - DOS 3.0+ internal - FLUSH BUFFER
        AX = 1215h
        DS:DI -> disk buffer
        SS = DOS DS (must be using a DOS internal stack)
        STACK: WORD drives for which to skip buffer
                ignore buffer if drive same as high byte, or bytes differ and
                  the buffer is for a drive OTHER than that given in low byte
Return: STACK unchanged
Note:   can be called only from within DOS
SeeAlso: AX=1209h
--------D-2F1216-----------------------------
INT 2F U - DOS 3.0+ internal - GET ADDRESS OF SYSTEM FILE TABLE ENTRY
        AX = 1216h
        BX = system file table entry number
Return: CF clear if successful
            ES:DI -> system file table entry
            BX = relative entry number in system file table containing entry
            AX destroyed
        CF set if BX greater than FILES=
Note:   supported by DR DOS 5+
SeeAlso: AX=1220h
--------D-2F1217-----------------------------
INT 2F U - DOS 3.0+ internal - GET CURRENT DIRECTORY STRUCTURE FOR DRIVE
        AX = 1217h
        SS = DOS DS (must be using a DOS internal stack)
        STACK: WORD drive (0 = A:, 1 = B:, etc)
Return: CF set on error
            (drive > LASTDRIVE)
        CF clear if successful
            DS:SI -> current directory structure for specified drive
        STACK unchanged
SeeAlso: AX=1219h
--------D-2F1218-----------------------------
INT 2F U - DOS 3.0+ internal - GET CALLER'S REGISTERS
        AX = 1218h
Return: DS:SI -> saved caller's AX,BX,CX,DX,SI,DI,BP,DS,ES (on stack)
Note:   only valid while within DOS
--------D-2F1219-----------------------------
INT 2F U - DOS 3.0+ internal - SET DRIVE???
        AX = 1219h
        SS = DOS DS (must be using a DOS internal stack)
        STACK: WORD drive (0 = default, 1 = A:, etc)
Return: ???
        STACK unchanged
Notes:  calls AX=1217h
        builds a current directory structure if inside server call
          (INT 21/AX=5D00h)
SeeAlso: AX=1217h,AX=121Fh
--------D-2F121A-----------------------------
INT 2F U - DOS 3.0+ internal - GET FILE'S DRIVE
        AX = 121Ah
        DS:SI -> filename
Return: AL = drive (0 = default, 1 = A:, etc, FFh = invalid)
        DS:SI -> filename without leading X: (if present)
SeeAlso: INT 21/AH=19h,INT 21/AH=60h
--------D-2F121B-----------------------------
INT 2F U - DOS 3.0+ internal - SET YEAR/LENGTH OF FEBRUARY
        AX = 121Bh
        CL = year - 1980
Return: AL = number of days in February
Note:   requires DS to be set to the DOS data segment
SeeAlso: INT 21/AH=2Bh"DATE"
--------D-2F121C-----------------------------
INT 2F U - DOS 3.0+ internal - CHECKSUM MEMORY
        AX = 121Ch
        DS:SI -> start of memory to checksum
        CX = number of bytes
        DX = initial checksum
        SS = DOS DS (must be using a DOS internal stack)
Return: AX, CX destroyed
        DX = checksum
        DS:SI -> first byte after checksummed range
Notes:  used by DOS to determine day count since 1/1/80 given a date
        supported by DR DOS 5.0+
SeeAlso: AX=121Dh
--------D-2F121D-----------------------------
INT 2F U - DOS 3.0+ internal - SUM MEMORY
        AX = 121Dh
        DS:SI -> memory to add up
        CX = 0000h
        DX = limit
Return: AL = byte which exceeded limit
        CX = number of bytes before limit exceeded
        DX = remainder after adding first CX bytes
        DS:SI -> byte beyond the one which exceeded the limit
Notes:  used by DOS to determine year or month given day count since 1/1/80
        supported by DR DOS 5.0+
SeeAlso: AX=121Ch
--------D-2F121E-----------------------------
INT 2F U - DOS 3.0+ internal - COMPARE FILENAMES
        AX = 121Eh
        DS:SI -> first ASCIZ filename
        ES:DI -> second ASCIZ filename
Return: ZF set if filenames equivalent, ZF clear if not
Note:   supported by DR DOS 5.0+
SeeAlso: AX=1211h,AX=1221h
--------D-2F121F-----------------------------
INT 2F U - DOS 3.0+ internal - BUILD CURRENT DIRECTORY STRUCTURE
        AX = 121Fh
        SS = DOS DS (must be using a DOS internal stack)
        STACK: WORD drive letter
Return: ES:DI -> current directory structure (will be overwritten by next call)
        STACK unchanged
--------D-2F1220-----------------------------
INT 2F U - DOS 3.0+ internal - GET JOB FILE TABLE ENTRY
        AX = 1220h
        BX = file handle
Return: CF set on error
            AL = 6 (invalid file handle)
        CF clear if successful
            ES:DI -> JFT entry for file handle in current process
Notes:  the byte pointed at by ES:DI contains the number of the SFT for the
          file handle, or FFh if the handle is not open
        supported by DR DOS 5.0+
SeeAlso: AX=1216h,AX=1229h
--------D-2F1221-----------------------------
INT 2F U - DOS 3.0+ internal - CANONICALIZE FILE NAME
        AX = 1221h
        DS:SI -> file name to be fully qualified
        ES:DI -> 128-byte buffer for resulting canonical file name
        SS = DOS DS (must be using a DOS internal stack)
Return: (see INT 21/AH=60h)
Note:   identical to INT 21/AH=60h
SeeAlso: AX=1123h,INT 21/AH=60h
--------D-2F1222-----------------------------
INT 2F U - DOS 3.0+ internal - SET EXTENDED ERROR INFO
        AX = 1222h
        SS = DOS data segment
        SS:SI -> 4-byte records
                BYTE    error code, FFh = last record
                BYTE    error class, FFh = don't change
                BYTE    suggested action, FFh = don't change
                BYTE    error locus, FFh = don't change
        SDA error code set
Return: SI destroyed
        SDA error class, error locus, and suggested action fields set
Note:   can be called only from within DOS
SeeAlso: AX=122Dh,INT 21/AH=59h/BX=0000h,INT 21/AX=5D0Ah
--------D-2F1223-----------------------------
INT 2F U - DOS 3.0+ internal - CHECK IF CHARACTER DEVICE
        AX = 1223h
        DS = DOS DS
        SS = DOS DS (must be using a DOS internal stack)
        SDA+218h (DOS 3.10-3.30) = eight-character blank-padded name
        SDA+22Bh (DOS 4.0-6.0) = eight-character blank-padded name
        SDA file attribute field set
        direction flag clear (i.e. CLD)
Return: CF set if no character device by that name found
        CF clear if found
            BH bits 4-0 copied from low byte of device attribute word
            BH bit 5 set, bits 7-6 clear
Notes:  can only be called from within DOS
        the check is skipped (always says "not device") if the volume ID bit
          of the file attribute field is set on entry
SeeAlso: INT 21/AX=5D06h,INT 21/AX=5D0Bh
--------D-2F1224-----------------------------
INT 2F U - DOS 3.0+ internal - SHARING RETRY DELAY
        AX = 1224h
        SS = DOS DS (must be using a DOS internal stack)
Return: after delay set by INT 21/AX=440Bh, unless in server call
          (INT 21/AX=5D00h)
Note:   delay is dependent on the processor speed, and is skipped entirely if
          inside a server call
SeeAlso: INT 21/AX=440Bh,INT 21/AH=52h,INT 62/AX=0097h
--------D-2F1225-----------------------------
INT 2F U - DOS 3.0+ internal - GET LENGTH OF ASCIZ STRING
        AX = 1225h
        DS:SI -> ASCIZ string
Return: CX = length of string
Note:   supported by DR DOS 5.0+
SeeAlso: AX=1212h
--------D-2F1226-----------------------------
INT 2F U - DOS 3.3+ internal - OPEN FILE
        AX = 1226h
        CL = access mode
        DS:DX -> ASCIZ filename
        SS = DOS DS (must be using a DOS internal stack)
Return: CF set on error
            AL = error code (see #01680 at INT 21/AH=59h/BX=0000h)
        CF clear if successful
            AX = file handle
Notes:  can only be called from within DOS
        equivalent to INT 21/AH=3Dh
        used by NLSFUNC to access COUNTRY.SYS when invoked by the DOS kernel
SeeAlso: AX=1227h,INT 21/AH=3Dh
--------D-2F1227-----------------------------
INT 2F U - DOS 3.3+ internal - CLOSE FILE
        AX = 1227h
        BX = file handle
        SS = DOS DS (must be using a DOS internal stack)
Return: CF set on error
            AL = 06h invalid file handle
        CF clear if successful
Notes:  can only be called from within DOS
        equivalent to INT 21/AH=3Eh
        used by NLSFUNC to access COUNTRY.SYS when invoked by the DOS kernel
SeeAlso: AX=1106h,AX=1201h,AX=1226h,INT 21/AH=3Eh
--------D-2F1228BP4200-----------------------
INT 2F U - DOS 3.3+ internal - MOVE FILE POINTER
        AX = 1228h
        BP = 4200h, 4201h, 4202h (see INT 21/AH=42h)
        BX = file handle
        CX:DX = offset in bytes
        SS = DOS DS (must be using a DOS internal stack)
Return: as for INT 21/AH=42h
Notes:  equivalent to INT 21/AH=42h, but may only be called from inside a DOS
          function call
        sets user stack frame pointer to dummy buffer, moves BP to AX, performs
          LSEEK, and restores frame pointer
        used by NLSFUNC to access COUNTRY.SYS when invoked by the DOS kernel
SeeAlso: INT 21/AH=42h
--------D-2F1229-----------------------------
INT 2F U - DOS 3.3+ internal - READ FROM FILE
        AX = 1229h
        BX = file handle
        CX = number of bytes to read
        DS:DX -> buffer
        SS = DOS DS (must be using a DOS internal stack)
Return: as for INT 21/AH=3Fh"DOS"
Notes:  equivalent to INT 21/AH=3Fh, but may only be called when already inside
          a DOS function call
        used by NLSFUNC to access COUNTRY.SYS when invoked by the DOS kernel
SeeAlso: AX=1226h,INT 21/AH=3Fh"DOS"
--------D-2F122A-----------------------------
INT 2F U - DOS 3.3+ internal - SET FASTOPEN ENTRY POINT
        AX = 122Ah
        BX = entry point to set (0001h or 0002h)
        DS:SI -> FASTOPEN entry point (see #02611,#02612)
                (entry point not set if SI = FFFFh for DOS 4.0+)
Return: CF set if specified entry point already set
Notes:  entry point in BX is ignored under DOS 3.30
        both entry points set to same handler by DOS 4.01
        DOS 5.0 and 6.0 only set entry point 1

(Table 02611)
Values DOS 3.30+ FASTOPEN entry point is called with:
        AL = 01h  Lookup
            CX = ??? seems to be offset
            DI = ??? seems to be offset
            SI = offset in DOS DS of filename
        AL = 02h  insert file into FASTOPEN cache
        AL = 03h  delete file from FASTOPEN cache
            SI = offset in DOS DS of filename
        AL = 04h  purge FASTOPEN cache
            AH = subfunction (00h,01h,02h)
            ES:DI -> ???
            CX = ??? (subfunctions 01h and 02h only)
Returns: CF set on error or not installed
Note: function 03h calls function 01h first
SeeAlso: #02612,#02613

(Table 02612)
Values PC-DOS 4.01 FASTOPEN is additionally called with:
        AL = 04h ???
            AH = 03h
            ???
        AL = 05h ???
        AL = 0Bh ???
        AL = 0Ch ???
        AL = 0Dh ???
        AL = 0Eh ???
        AL = 0Fh ???
        AL = 10h ???
SeeAlso: #02611,#02613

(Table 02613)
Values MS-DOS 5.0-6.0 FASTOPEN is additionally called with:
        AL = 04h  purge FASTOPEN cache
            AH = 03h
            ???
        AL = 05h ???
            DL = drive (00h = A:)
            ???
        AL = 06h ???
            ???
SeeAlso: #02611,#02612
--------D-2F122B-----------------------------
INT 2F U - DOS 3.3+ internal - IOCTL
        AX = 122Bh
        BP = 44xxh
        SS = DOS DS (must be using a DOS internal stack)
        additional registers as appropriate for INT 21/AX=44xxh
Return: as for INT 21/AH=44h
Notes:  equivalent to INT 21/AH=44h, but may only be called when already inside
          a DOS function call
        sets user stack frame pointer to dummy buffer, moves BP to AX, performs
          IOCTL, and restores frame pointer
        used by NLSFUNC in accessing COUNTRY.SYS when invoked by the DOS kernel
SeeAlso: INT 21/AH=44h
--------D-2F122C-----------------------------
INT 2F U - DOS 3.3+ internal - GET DEVICE CHAIN
        AX = 122Ch
Return: BX:AX -> header of second device driver (NUL is first) in driver chain
Note:   although this function exists in DR DOS 5.0 and Novell DOS 7, it
          always returns 0000h:0000h prior to Novell DOS 7 Update 15
SeeAlso: INT 21/AH=52h
--------D-2F122D-----------------------------
INT 2F U - DOS 3.3+ internal - GET EXTENDED ERROR CODE
        AX = 122Dh
        SS = DOS DS
Return: AX = current extended error code
SeeAlso: AX=1222h,INT 21/AH=59h/BX=0000h
--------D-2F122E-----------------------------
INT 2F U - DOS 4.0+ internal - GET OR SET ERROR TABLE ADDRESSES
        AX = 122Eh
        DL = subfunction
            00h get standard DOS error table (see #02614)
                Return: ES:DI -> error table
                                 (DOS 4: errors 00h-12h,50h-5Bh)
                                 (DOS 5: errors 00h-26h,4Fh,51h-59h)
            01h set standard DOS error table
                ES:DI -> error table
            02h get parameter error table (errors 00h-0Ah)
                Return: ES:DI -> error table
            03h set parameter error table
                ES:DI -> error table
            04h get critical/SHARE error table (errors 13h-2Bh)
                Return: ES:DI -> error table
            05h set critical/SHARE error table
                ES:DI -> error table
            06h get ??? error table
                Return: ES:DI -> error table or 0000h:0000h
            07h set ??? error table
                ES:DI -> error table
            08h get error message retriever (see #02615)
                Return: ES:DI -> FAR procedure to fetch error message
            09h set ??? error table
                ES:DI -> error table
Notes:  if the returned segment on a "get" is 0001h, then the offset specifies
          the offset of the error message table within COMMAND.COM, and the
          procedure returned by DL=08h should be called
        DOS 5+ COMMAND.COM does not allow setting any of the addresses (calls
          with DL odd are ignored); they are always returned with segment 0001h
        for DOS 5.0, the standard and critical/SHARE error tables are combined
          into a single error table
SeeAlso: AX=0500h,INT 21/AH=59h/BX=0000h

Format of DOS 4.x error table:
Offset  Size    Description     (Table 02614)
 00h    BYTE    FFh
 01h  2 BYTEs   04h,00h (DOS version???)
 03h    BYTE    number of error headers following
 04h 2N WORDs   table of all error headers for table
                Offset  Size    Description
                 00h    WORD    error message number
                 02h    WORD    offset of error message from start of header
                                error messages are count byte followed by msg
Note:   DOS 5 error tables consist of one word per error number; each word
          contains either the offset of a counted string or 0000h

(Table 02615)
Call error retrieval function with:
        AX = error number (see #02616)
        DI = offset of error table
Return: ES:DI -> error message (counted string)
Notes:  this function needs to access COMMAND.COM if the messages were not
          loaded into memory permanently with /MSG; the caller should assume
          that the returned message will be overwritten by the next call of
          the function
        supported by DR DOS 5.0

(Table 02616)
Values for parameter errors:
 01h    Too many parameters
 02h    Required Parameter missing
 03h    Invalid switch
 04h    Invalid keyword
 06h    Parameter value not in allowed range
 07h    Parameter value not allowed
 08h    Parameter value not allowed
 09h    Parameter format not correct
 0Ah    Invalid parameter
 0Bh    Invalid parameter combination
--------D-2F122F-----------------------------
INT 2F U - DOS 4.x internal - SET DOS VERSION NUMBER TO RETURN
        AX = 122Fh
        DX = DOS version number (0000h = return true DOS version)
Notes:  not available under DR DOS 5.0 or 6.0, or Novell DOS 7
        supported by FREEVER.COM, a freeware DOS version faking TSR by Matthias
          Paul
SeeAlso: INT 21/AH=30h,INT 21/AX=3306h,INT 2F/AX=E000h"SETDRVER"
----------2F1230-----------------------------
INT 2F U - Windows95 - FIND SFT ENTRY IN INTERNAL FILE TABLES
        AX = 1230h
        ES:DI -> SFT entry
Return: CF clear if SFT found in internal table
        CF set if SFT not in any internal file table
            AX = 0000h
            SI:CX = 32-bit starting cluster number for directory
            DX = directory entry number
            BX = index into new file system table
Note:   the new file system table from which the return values are taken is
          reported to be statically allocated with 20 entries, and used only
          for FCB calls
BUG:    Win95-OSR2 is reported to have a bug that can potentially corrupt
          memory if SFT tables are "arranged poorly"
SeeAlso: AX=1231h,AX=1200h
----------2F1231-----------------------------
INT 2F U - Windows95 - SET/CLEAR "REPORT WINDOWS TO DOS PROGRAMS" FLAG
        AX = 1231h
        DL = function
            00h set byte after "IsWIN386" to 01h
            01h set "IsWIN386" bit 1
            02h clear "IsWIN386" bit 1
            else
                Return: CF set
                        AX = 0001h
Return: CF clear
        AX = 0000h
BUG:    Windows98 will crash the system if DL>02h on entry due to an off-by-1
          conditional jump; if the jump were correct, the function would return
          CF set/AX=0001h as for Windows95
SeeAlso: AX=1230h,AX=1200h
--------O-2F12FFBL00-------------------------
INT 2F - FreeDOS - FDAK-DDT - INSTALLATION CHECK / STATUS CHECK
        AX = 12FFh
        BL = 00h
Return: AL = DDh if installed
            BH = state (00h disabled, nonzero enabled)
            BL = readonly flag (00h writable, nonzero read-only)
Program: FDAK-DDT is the FreeDOS Alternative Kernel Device Drivers Testing
          release by Yury A. Semenov
SeeAlso: AX=12FFh/BL=07h
--------O-2F12FFBL01-------------------------
INT 2F - FreeDOS - FDAK-DDT - ENABLE FDAK DRIVERS
        AX = 12FFh
        BL = 01h
SeeAlso: AX=12FFh/BL=00h,AX=12FFh/BL=02h
--------O-2F12FFBL02-------------------------
INT 2F - FreeDOS - FDAK-DDT - DISABLE FDAK DRIVERS
        AX = 12FFh
        BL = 02h
SeeAlso: AX=12FFh/BL=00h,AX=12FFh/BL=01h
--------O-2F12FFBL03-------------------------
INT 2F - FreeDOS - FDAK-DDT - SWITCH BLOCK DEVICE TO READ-ONLY
        AX = 12FFh
        BL = 03h
        ???
SeeAlso: AX=12FFh/BL=00h,AX=12FFh/BL=04h
--------O-2F12FFBL04-------------------------
INT 2F - FreeDOS - FDAK-DDT - SWITCH BLOCK DEVICE TO READ-WRITE
        AX = 12FFh
        BL = 04h
        ???
SeeAlso: AX=12FFh/BL=00h,AX=12FFh/BL=03h
--------O-2F12FFBL05-------------------------
INT 2F - FreeDOS - FDAK-DDT - TURN ACTIVITY INDICATOR ON
        AX = 12FFh
        BL = 05h
Note:   not yet implemented as of January 1996
SeeAlso: AX=12FFh/BL=00h,AX=12FFh/BL=06h
--------O-2F12FFBL06-------------------------
INT 2F - FreeDOS - FDAK-DDT - TURN ACTIVITY INDICATOR OFF
        AX = 12FFh
        BL = 06h
Note:   not yet implemented as of January 1996
SeeAlso: AX=12FFh/BL=00h,AX=12FFh/BL=05h
--------O-2F12FFBL07-------------------------
INT 2F - FreeDOS - FDAK-DDT - UNINSTALL
        AX = 12FFh
        BL = 07h
Return: ES = segment of FDAK memory block
Note:   the caller must free the memory block returned in ES
          (via INT 21/AH=49h)
SeeAlso: AX=12FFh/BL=00h
--------O-2F12FFBX0005-----------------------
INT 2F U - Novell DOS 7 - GET/SET/QUERY MEMORY STATE???
        AX = 12FFh
        BX = 0005h
        CX = 0000h
        DX = function
            0000h ???
            0001h ???
Note:   called at three separate points inside IBMBIO.COM
--------m-2F12FFBX0006-----------------------
INT 2F U - DR DOS 6, Novell DOS 7 - EMM386.EXE - VIDEO MEMORY SPACE CONTROL
        AX = 12FFh
        BX = 0006h
        DX = 0000h
        CX = function
            0000h get status of video memory space (MEMMAX /V)
            0001h map memory into video memory space (MEMMAX +V)
            0002h unmap memory from video memory space (MEMMAX -V)
Return: CF clear if successful
            AX = 0000h (successful)
            BX = segment of reserved video RAM
            CX = segment of used video RAM
            DX = segment of first upper MCB
Notes:  this functionality is provided by EMM386, and partially supported by
          HIDOS.SYS
        BL specifies which program handles the call, BH is the function number
BUG:    4DOS 5.51(a) often hangs the system (reported to be reproducable), if
          MEMMAX +V is issued from the 4DOS prompt.  To avoid this, one should
          temporary load COMMAND.COM followed by MEMMAX +v , starting the
          application, MEMMAX -v and EXIT.  4DOS 5.5c does not show this
          phenomena on the same systems where 5.51a hangs.
SeeAlso: AX=D201h/BX=4849h
--------O-2F12FFBX0000-----------------------
INT 2F U - Novell DOS 7 - GET ???
        AX = 12FFh
        BX = 0000h
Return: AX = 0000h if supported
        DX = ??? (internal data)
SeeAlso: AX=12FFh/BX=0001h
--------O-2F12FFBX0001-----------------------
INT 2F U - Novell DOS 7 - SET ???
        AX = 12FFh
        BX = 0001h
        DX = new value for ???
Return: AX = 0000h if supported
SeeAlso: AX=12FFh/BX=0000h
--------O-2F12FFBX0002-----------------------
INT 2F U - Novell DOS 7 - GET ??? SIZE
        AX = 12FFh
        BX = 0002h
Return: AX = 0000h if supported
        DX = size of/required-for ??? in paragraphs
SeeAlso: AX=12FFh/BX=0003h
--------O-2F12FFBX0003-----------------------
INT 2F U - Novell DOS 7 - SET ???
        AX = 12FFh
        BX = 0003h
        DX = new value for ???
Return: AX = 0000h if supported
SeeAlso: AX=12FFh/BX=0002h
--------O-2F12FFBX0007-----------------------
INT 2F U - Novell DOS 7 - SCRIPT.EXE - GET ???
        AX = 12FFh
        BX = 0007h
        CX = 0000h
Return: CF clear if installed
            AX = 0000h
            BX = ??? (4426h)
            CX = ??? (0068h)
            DX = PSP segment of resident code???
            SI = ??? (4AFAh)
            ES = resident code segment
--------O-2F12FFBX0009-----------------------
INT 2F U - Novell DOS 7 - SET ???
        AX = 12FFh
        BX = 0009h
        DX = new value for ???
Return: ???
Note:   the DX value is stored at offset 66h in SYSVARS and offset 18h in
          the Novell DOS 7 internal variable table
--------m-2F12FFBX0106-----------------------
INT 2F U - Novell DOS 7 - EMM386.EXE - GET VERSION???
        AX = 12FFh
        BX = 0106h
Return: CF clear if successful
            AX = 0000h (successful)
            BX = EDC0h (signature)
            CL = memory manager variant (02h,03h)
                (02h when DPMI/VCPI disabled, 03h when DPMI/VCPI loaded)
            CH = ??? (00h)
            DX = version??? (0300h for v3.0)
            ES = segment of EMM386 low-memory stub
Notes:  BL specifies which program handles the call, BH is the function number
        if the word at ES:0012h is nonzero, if contains the offset within
          segment ES of the CEMM-compatible entry point (see #02617)
        if no other program has hooked INT 67, an alternate installation
          check is to test for the string
          "NOVELL EXPANDED MEMORY MANAGER 386" at offset 14h in the INT 67
          handler's segment; the word immediately preceding this string
          contains the offset of the API entry point if it is nonzero
Index:  entry point;Novell EMM386

(Table 02617)
Call Novell EMM386.EXE entry point with:
        AH = 00h get memory manager's status???
            ???
        AH = 01h set memory manager's status???
            ???
        AH = 02h Weitek coprocessor support???
            AL = subfunction???
        more functions???
SeeAlso: #01513 at INT 21/AX=4402h/SF=02h,#03666 at INT 67/AX=FFA5h
--------m-2F12FFBL06-------------------------
INT 2F U - Novell DOS 7 - EMM386.EXE - ???
        AX = 12FFh
        BL = 06h
        BH = function (02h-09h)
        ???
Return: ???
--------O-2F12FFBX0EDC-----------------------
INT 2F U - Novell DOS 7 - EMM386.EXE - CHECK IF MULTITASKING SUPPORT LOADED???
        AX = 12FFh
        BX = 0EDCh ('EDC' = Novell European Development Center)
Return: AX = 0000h if ??? loaded
            CF clear
            BX = 0000h
Notes:  called by Novell DOS 7 TaskMgr
        if this function returns with AX=0000h, then the code necessary to
          support the API on INT 2F/AX=2780h is loaded and that API becomes
          available for use
        because the request is handled on the initial trap to the memory
          manager caused by INT instructions, this function must be invoked
          with an actual INT 2F instruction instead of some simulation such
          as a far call to the address in the interrupt vector table
SeeAlso: AX=2780h/CL=01h,AX=2780h/CL=02h,AX=2780h/CL=03h,AX=2780h/CL=04h
--------D-2F13-------------------------------
INT 2F U - DOS 3.2+ - SET DISK INTERRUPT HANDLER
        AH = 13h
        DS:DX -> interrupt handler disk driver calls on read/write
        ES:BX = address to restore INT 13 to on system halt (exit from root
                 shell) or warm boot (INT 19)
Return: DS:DX set by previous invocation of this function
        ES:BX set by previous invocation of this function
Notes:  IO.SYS hooks INT 13 and inserts one or more filters ahead of the
          original INT 13 handler.  The first is for disk change detection
          on floppy drives, the second is for tracking formatting calls and
          correcting DMA boundary errors, the third is for working around
          problems in a particular version of IBM's ROM BIOS
        before the first call, ES:BX points at the original BIOS INT 13; DS:DX
          also points there unless IO.SYS has installed a special filter for
          hard disk reads (on systems with model byte FCh and BIOS date
          "01/10/84" only), in which case it points at the special filter
        most DOS 3.2+ disk access is via the vector in DS:DX, although a few
          functions are still invoked via an INT 13 instruction
        this is a dangerous security loophole for any virus-monitoring software
          which does not trap this call ("INT13", "Nomenklatura", and many
          Bulgarian viruses are known to use it to get the original ROM entry
          point)
SeeAlso: INT 13/AH=01h,INT 19,INT 9D"VIRUS"
--------N-2F13-------------------------------
INT 2F U - MS-NET - ???
        AH = 13h
        ???
Return: ???
Note:   supposedly used to move (or control the movement of) NCBs
--------U-2F1400-----------------------------
INT 2F C - NLSFUNC.COM - INSTALLATION CHECK
        AX = 1400h
Return: AL = 00h not installed, OK to install
             01h not installed, not OK
             FFh installed
Notes:  this function is called by the DOS v3.3+ kernel
        supported by OS/2 v1.3+ compatibility box, which always returns AL=FFh
        supported by DR DOS 5.0
        documented for MS-DOS 5+, but undocumented in prior versions
SeeAlso: AX=1401h"NLSFUNC",AX=1402h"NLSFUNC"
--------D-2F1400-----------------------------
INT 2F - European MS-DOS 4.0 POPUP - "CheckPu" - INSTALLATION CHECK
        AX = 1400h
Return: AX = FFFFh if installed
            BX = maximum memory required to save screen and keyboard info
        CF clear if successful
        CF set on error
            AX = error code
                0002h invalid function
                0004h unknown error
Note:   the POPUP interface is used by background programs (see INT 21/AH=80h)
          to communicate with the user
SeeAlso: AX=1401h"POPUP",AX=1402h"POPUP",AX=1403h"POPUP"
--------U-2F1401-----------------------------
INT 2F CU - NLSFUNC.COM - CHANGE CODE PAGE
        AX = 1401h
        DS:SI -> internal code page structure (see #02618)
        BX = new code page (see #01757 at INT 21/AX=6602h)
        DX = country code???
Return: AL = status
             00h successful
             else DOS error code
Note:   this function is called by the DOS v3.3+ kernel
SeeAlso: AX=1400h"NLSFUNC",AX=1402h"NLSFUNC",INT 21/AH=66h

Format of DOS 3.30 internal code page structure:
Offset  Size    Description     (Table 02618)
 00h  8 BYTEs   ???
 08h 64 BYTEs   name of country information file (see #02619)
 48h    WORD    system code page (see #01757 at INT 21/AX=6602h)
 4Ah    WORD    number of supported subfunctions
 4Ch  5 BYTEs   data to return for INT 21/AX=6502h
 51h  5 BYTEs   data to return for INT 21/AX=6504h
 56h  5 BYTEs   data to return for INT 21/AX=6505h
 5Bh  5 BYTEs   data to return for INT 21/AX=6506h
 60h 41 BYTEs   data to return for INT 21/AX=6501h

Format of MS-DOS/PC-DOS/OS2/WinNT/PTS-DOS COUNTRY.SYS file:
Offset  Size    Description     (Table 02619)
 00h    BYTE    ID tag (FFh)
 01h  7 BYTEs   ASCII "COUNTRY"
 08h  8 BYTEs   ??? (00h)
 10h    BYTE    ??? (01h)
 11h    BYTE    ??? (00h)
 12h    BYTE    ??? (01h)
 13h    DWORD   offset of first entry in file (see #02620)
SeeAlso: #02623

Format of MS-DOS/PC-DOS/OS2/WinNT/PTS-DOS COUNTRY.SYS entry:
Offset  Size    Description     (Table 02620)
 00h    WORD    number of country-codepage entries following
 02h            N Country-Codepage entries:
                Offset  Size    Description
                 00h    WORD    length of entry, not counting this word (000Ch)
                 02h    WORD    country ID
                 04h    WORD    codepage ID
                 06h    WORD    ??? (0000h)
                 08h    WORD    ??? (0000h)
                 0Ah    DWORD   offset of country-subfunction-header in file
                                  (see #02621)
Notes:  multiple codepages for a country are stored consecutively
        PTS/DOS places a copyright string immediately following this structure,
          though a copyright at the end of the file is preferable
SeeAlso: #02619

Format of MS-DOS/PC-DOS/OS2/WinNT/PTS-DOS COUNTRY.SYS country-subfunc header:
Offset  Size    Description     (Table 02621)
 00h    WORD    number of subfunction entries following
 02h            N subfunction entries
                Offset  Size    Description
                 00h    WORD    length of subfunction entry, not counting this
                                  word (usually 06h)
                 02h    WORD    subfunction ID
                                (value passed to INT 21/AH=65h in AL)
                 04h    DWORD   offset within file of subfunction data entry
                                  (see #02622)
SeeAlso: #02620

Format of MS-DOS/PC-DOS/OS2/WinNT/PTS-DOS COUNTRY.SYS country-subfunc data::
Offset  Size    Description     (Table 02622)
 00h    BYTE    ID-tag (FFh)
 01h  7 BYTEs   table-type signature (blank-padded)
                "CTYINFO"       general country info (subfn 01h)
                "UCASE  "       uppercase table (subfn 02h)
                "LCASE  "       lowercase table (subfn 03h) (DOS 6.2_)
                "FUCASE "       filename uppercase table (subfn 04h)
                "FCHAR  "       filename terminator table (subfn 05h)
                "COLLATE"       collating sequence (subfn 06h)
                "DBCS   "       double-byte character table (subfn 07h)
 08h    WORD    length of following table in bytes
                (if 0000h for DBCS table, there will still be a word of 0000h)
---country info (01h)---
 0Ah    WORD    country ID (see #01400 at AH=38h)
 0Ch    WORD    code page (see #01757)
 0Eh 34 BYTEs   country-dependent info (see #01399 at AH=38h)
---uppercase table (02h)---
 0Ah 128 BYTEs  uppercase equivalents (if any) of chars 80h to FFh
---lowercase table (03h)---
 0Ah 256 BYTEs  lowercase equivalents (if any) of chars 00h to FFh
---filename uppercase table (04h)---
 0Ah 128 BYTEs  uppercase equivalents (if any) of chars 80h to FFh
---filename terminator table (05h)---
 0Ah    BYTE    ??? (01h for MS-DOS 3.30-6.00)
 0Bh    BYTE    lowest permissible character value for filename
 0Ch    BYTE    highest permissible character value for filename
 0Dh    BYTE    ??? (00h for MS-DOS 3.30-6.00)
 0Eh    BYTE    first excluded character in range \ all characters in this
 0Fh    BYTE    last excluded character in range  / range are illegal
 10h    BYTE    ??? (02h for MS-DOS 3.30-6.00)
 11h    BYTE    number of illegal (terminator) characters
 12h  N BYTEs   characters which terminate a filename:  ."/\[]:|<>+=;,
---collating sequence (06h)---
 0Ah 256 BYTEs  values used to sort characters 00h to FFh
---DBCS table (07h)---
 0Ah 2N BYTEs   start/end for N lead byte ranges
        WORD    0000h   (end of table)
SeeAlso: #02621,#01750,#01751,#01753,#01754,#01755,#01756

Format of DR DOS/Novell DOS/OpenDOS COUNTRY.SYS file:
Offset  Size    Description     (Table 02623)
 00h 126 BYTEs  copyright notice (terminated with Ctrl-Z; NUL-padded)
                the copyright notice starts with the signature
                "COUNTRY.SYS Rx.xx" where "x.xx" indicates the file format
                revision, which is checked by the OS (revision is 2.00 for
                DR DOS 3.41 and 2.01 for all newer versions of DR DOS,
                Novell DOS, and OpenDOS)
 7Eh    WORD    signature of file format revision
                0EDCh = 2.00 (DR DOS 3.41)
                EDC1h = 2.01 (all newer versions)
 80h    var     country pointer records (see #02624)
                (packed array of variable-size records)
SeeAlso: #02619

Format of DR DOS/Novell DOS/OpenDOS COUNTRY.SYS country pointer record::
Offset  Size    Description     (Table 02624)
 00h    WORD    country code (0000h if end of array)
 02h    WORD    code page (see #01757)
 04h    WORD    ??? (0000h)
 06h  7 WORDs   offsets in file for INT 21/AH=65h subfunctions 01h to 07h, or
                  0000h if no table for that subfunction
 14h    var     country information
Notes:  the end-of-file marker is a country pointer record filled entirely with
          zeros
        the data at which the pointers point is in the same format as the
          tables returned by INT 21/AH=65h, except that the general-info
          table for subfunction 01h does not contain the length word at the
          beginning
SeeAlso: #02623
--------D-2F1401-----------------------------
INT 2F - European MS-DOS 4.0 POPUP - "PostPu" - OPEN/CLOSE POPUP SCREEN
        AX = 1401h
        DL = function (00h open, 01h close)
        DH = wait flag
            00h block until screen opens
            01h return error if screen is not available
            02h urgent--always open screen immediately
Return: CF clear if successful
            BX = amount of memory needed to save screen and keyboard info,
                0000h if default save location can be used (only if DH was 02h)
        CF set on error
Note:   the application using the screen is frozen until the popup screen is
          closed
SeeAlso: AX=1400h"POPUP",AX=1402h"POPUP",AX=1403h"POPUP"
--------U-2F1402-----------------------------
INT 2F CU - NLSFUNC.COM - GET EXTENDED COUNTRY INFO
        AX = 1402h
        BP = subfunction (same as AL for INT 21/AH=65h)
        BX = code page (see #01757 at INT 21/AX=6602h)
        DX = country code (see #01400 at INT 21/AH=38h)
        DS:SI -> internal code page structure (see #02618)
        ES:DI -> user buffer
        CX = size of user buffer
Return: AL = status
            00h successful
            else DOS error code
Notes:  this function is called by the DOS v3.3+ kernel on INT 21/AH=65h
        code page structure apparently only needed for COUNTRY.SYS pathname
SeeAlso: AX=1401h"NLSFUNC",AX=1403h"NLSFUNC",AX=1404h,INT 21/AH=65h
--------D-2F1402-----------------------------
INT 2F - European MS-DOS 4.0 POPUP - "SavePu" - SAVE POPUP SCREEN
        AX = 1402h
        ES:DI -> save buffer (0000h:0000h for default buffer in POPUP)
Return: CF clear if successful
        CF set on error
            AX = error code (see #02625)
SeeAlso: AX=1400h"POPUP",AX=1401h"POPUP",AX=1403h"POPUP"

(Table 02625)
Values for POPUP error code:
 0001h  process does not own screen
 0004h  unknown error
 0005h  invalid pointer
--------U-2F1403-----------------------------
INT 2F CU - NLSFUNC.COM - SET CODE PAGE
        AX = 1403h
        DS:SI -> internal code page structure (see #02618)
        BX = code page (see #01757 at INT 21/AX=6602h)
        DX = country code (see #01400 at INT 21/AH=38h)
Return: AL = status
             ???
Note:   this function is called by the DOS v3.3+ kernel on INT 21/AH=38h
SeeAlso: AX=1402h"NLSFUNC",AX=1404h,INT 21/AH=38h"SET"
--------D-2F1403-----------------------------
INT 2F - European MS-DOS 4.0 POPUP - "RestorePu" - RESTORE SCREEN
        AX = 1403h
        ES:DI -> buffer containing saved screen
                (0000h:0000h for default buffer in POPUP)
Return: CF clear if successful
        CF set on error
            AX = error code (see #02625)
SeeAlso: AX=1400h"POPUP",AX=1401h"POPUP",AX=1402h"POPUP"
--------U-2F1404-----------------------------
INT 2F CU - NLSFUNC.COM - GET COUNTRY INFO
        AX = 1404h
        BX = code page (see #01757 at INT 21/AX=6602h)
        DX = country code (see #01400 at INT 21/AH=38h)
        DS:SI -> internal code page structure (see #02618)
        ES:DI -> user buffer
Return: AL = status
             ???
Notes:  this function is called by the DOS v3.3+ kernel on INT 21/AH=38h
        code page structure apparently only needed for COUNTRY.SYS pathname
SeeAlso: AX=1402h,AX=1403h,INT 21/AH=38h"GET"
--------U-2F14FE-----------------------------
INT 2F U - DR DOS 5.0 NLSFUNC - GET EXTENDED COUNTRY INFORMATION
        AX = 14FEh
        BX = code page (FFFFh=global code page) (see #01757 at INT 21/AX=6602h)
        DX = country ID (FFFFh=current country) (see #01400 at INT 21/AH=38h)
        ES:DI -> country information buffer
        CL = info ID
            01h get general internationalization info
            02h get pointer to uppercase table
            04h get pointer to filename uppercase table
            05h get pointer to filename terminator table
            06h get pointer to collating sequence table
            07h get pointer to Double-Byte Character Set table
        CF set (used to return error if not installed)
Return: CF clear if successful
            DS:SI -> requested information
        CF set on error
Notes:  DR DOS 5.0 NLSFUNC returns CF set and AX=0001h if AL was not 00h, FEh,
          or FFh on entry.
        the DR DOS kernel calls this function on INT 21/AX=6501h
        the value in CL is not range-checked by the DR DOS 5.0 NLSFUNC
SeeAlso: #02626,AX=14FFh,INT 21/AH=65h

Format of DR DOS COUNTRY.SYS file:
Offset  Size    Description     (Table 02626)
 00h 126 BYTEs  copyright notice (terminated with Ctrl-Z, padded with NULs)
 7Eh    WORD    signature EDC1h
 80h    var     country pointer records
        Offset  Size    Description
         00h    WORD    country code (0000h if end of array)
         02h    WORD    code page (see #01757 at INT 21/AX=6602h)
         04h    WORD    ??? (0000h)
         06h  7 WORDs   offsets in file for data tables for subfunctions
                          01h-07h
 var    var     country information
--------U-2F14FF-----------------------------
INT 2F U - DR DOS 5.0 NLSFUNC - PREPARE CODE PAGE
        AX = 14FFh
        BX = code page (see #01757 at INT 21/AX=6602h)
Return: AX = ???
        ZF set if AX=0000h
Notes:  DR DOS 5.0 NLSFUNC returns CF set and AX=0001h if AL was not 00h, FEh,
          or FFh on entry.
        passes codepage preparation request to each character device supporting
          the generic IOCTL call
SeeAlso: AX=14FEh,INT 21/AX=440Ch,INT 21/AX=6602h
--------U-2F1500-----------------------------
INT 2F - DOS 4.00 GRAPHICS.COM - INSTALLATION CHECK
        AX = 1500h
Return: AX = FFFFh
        ES:DI -> ??? (graphics data?)
Note:   this installation check conflicts with the CD-ROM Extensions
          installation check; moved to AX=AC00h in later versions
SeeAlso: AX=AC00h
--------d-2F1500BX0000-----------------------
INT 2F - CD-ROM - INSTALLATION CHECK
        AX = 1500h
        BX = 0000h
Return: BX = number of CD-ROM drive letters used
        CX = starting drive letter (0=A:)
        AX = 15FFh (Novell DOS 7 NWCDEX only!)
Notes:  this installation check DOES NOT follow the format used by other
          software
        this installation check conflicts with the DOS 4.00 GRAPHICS.COM
          installation check
BUG:    this function may return an incorrect starting drive letter when
          INTERLNK is installed
SeeAlso: AX=150Ch,AX=15FFh,INT 2F/AX=D000h"Lotus"
--------c-2F1500CH90-------------------------
INT 2F U - CDBLITZ v2.11 - INSTALLATION CHECK
        AX = 1500h
        CH = 90h (function number)
        BX = 1234h (magic value for CDBLITZ)
Return: CX = 1234h if installed
            CF clear
            DX = BCD version number (DH = major, DL = minor)
Program: CDBLITZ is a CD-ROM cache by Blitz 'n' Software, Inc.
SeeAlso: AX=1500h/CH=99h
--------c-2F1500CH91-------------------------
INT 2F U - CDBLITZ v2.11 - GET STATISTICS
        AX = 1500h
        CH = 91h (function number)
        BX = 1234h (magic value for CDBLITZ)
Return: CF clear
        ES:BX -> statistics record (see #02627)
SeeAlso: AX=1500h/CH=90h,AX=1500h/CH=97h

Format of CDBLITZ statistics record:
Offset  Size    Description     (Table 02627)
 00h    WORD    cache mode (see also AX=1500h/CH=94h)
                0001h 'min', 0002h 'max'
 02h    DWORD   number of read calls???
 06h    DWORD   total number of sectors read
 0Ah    DWORD   unused??? (zero)
 0Eh    DWORD   number of cache hit sectors
 12h    WORD    cache size in KB
 14h    WORD    unused??? (zero)
 16h    WORD    cache state (0000h disabled, 0001h enabled)
--------c-2F1500CH92-------------------------
INT 2F U - CDBLITZ v2.11 - ENABLE CACHE
        AX = 1500h
        CH = 92h (function number)
        BX = 1234h (magic value for CDBLITZ)
Return: CF clear
SeeAlso: AX=1500h/CH=90h,AX=1500h/CH=93h,AX=1500h/CH=94h
--------c-2F1500CH93-------------------------
INT 2F U - CDBLITZ v2.11 - DISABLE CACHE
        AX = 1500h
        CH = 93h (function number)
        BX = 1234h (magic value for CDBLITZ)
Return: CF clear
SeeAlso: AX=1500h/CH=90h,AX=1500h/CH=92h,AX=1500h/CH=95h
--------c-2F1500CH94-------------------------
INT 2F U - CDBLITZ v2.11 - SET 'MAX' MODE (CACHE BOTH DIRECTORIES AND DATA)
        AX = 1500h
        CH = 94h (function number)
        BX = 1234h (magic value for CDBLITZ)
Return: CF clear
SeeAlso: AX=1500h/CH=90h,AX=1500h/CH=92h,AX=1500h/CH=95h
--------c-2F1500CH95-------------------------
INT 2F U - CDBLITZ v2.11 - SET 'MIN' MODE (CACHE ONLY DIRECTORY ENTRIES)
        AX = 1500h
        CH = 95h (function number)
        BX = 1234h (magic value for CDBLITZ)
Return: CF clear
SeeAlso: AX=1500h/CH=90h,AX=1500h/CH=94h
--------c-2F1500CH96-------------------------
INT 2F U - CDBLITZ v2.11 - FLUSH CACHE
        AX = 1500h
        CH = 96h (function number)
        BX = 1234h (magic value for CDBLITZ)
Return: CF clear
Note:   this function resets the counts for number of sectors read and number
          of cache hits, but no other values in the statistics record
          (see #02627)
SeeAlso: AX=1500h/CH=90h
--------c-2F1500CH97-------------------------
INT 2F U - CDBLITZ v2.11 - GET CACHE STATISTICS
        AX = 1500h
        CH = 97h (function number)
        BX = 1234h (magic value for CDBLITZ)
Return: CF clear
        AL = cache mode (01h 'min', 02h 'max') (see also AX=1500h/CH=94h)
        AH = cache state (00h disabled, 01h enabled)
        BX = cache size in KB
        DX:CX = total number of reads
        DI:SI = number of cache hits
SeeAlso: AX=1500h/CH=90h,AX=1500h/CH=91h
--------c-2F1500CH99-------------------------
INT 2F U - CDBLITZ v2.11 - UNINSTALL
        AX = 1500h
        CH = 99h (function number)
        BX = 1234h (magic value for CDBLITZ)
Return: CF clear
        ???
Program: CDBLITZ is a CD-ROM cache by Blitz 'n' Software, Inc.
SeeAlso: AX=1500h/CH=90h
--------d-2F1501-----------------------------
INT 2F - CD-ROM - GET DRIVE DEVICE LIST
        AX = 1501h
        ES:BX -> buffer to hold drive letter list (5 bytes per drive letter)
Return: buffer filled, for each drive letter
          BYTE  subunit number in driver
          DWORD address of device driver header (see #01646)
Note:   reportedly returns AX=0000h and an invalid address under Windows95;
          other reports say it works fine
SeeAlso: AX=1510h
--------d-2F1502-----------------------------
INT 2F - CD-ROM - GET COPYRIGHT FILE NAME
        AX = 1502h
        ES:BX -> 38-byte buffer for name of copyright file
        CX = drive number (0=A:)
Return: CF set if drive is not a CD-ROM drive
            AX = 000Fh (invalid drive)
        CF clear if successful
SeeAlso: AX=1503h
--------d-2F1503-----------------------------
INT 2F - CD-ROM - GET ABSTRACT FILE NAME
        AX = 1503h
        ES:BX -> 38-byte buffer for name of abstract file
        CX = drive number (0=A:)
Return: CF set if drive is not a CD-ROM drive
            AX = 000Fh (invalid drive)
        CF clear if successful
SeeAlso: AX=1502h,AX=1504h
--------d-2F1504-----------------------------
INT 2F - CD-ROM - GET BIBLIOGRAPHIC DOC FILE NAME
        AX = 1504h
        ES:BX -> 38-byte buffer for name of bibliographic documentation file
        CX = drive number (0=A:)
Return: CF set if drive is not a CD-ROM drive
            AX = 000Fh (invalid drive)
        CF clear if successful
SeeAlso: AX=1502h,AX=1503h
--------d-2F1505-----------------------------
INT 2F - CD-ROM - READ VTOC
        AX = 1505h
        ES:BX -> 2048-byte buffer
        CX = drive number (0=A:)
        DX = sector index (0=first volume descriptor,1=second,...)
Return: CF set on error
            AX = error code (15=invalid drive,21=not ready)
        CF clear if successful
            AX = volume descriptor type (1=standard,FFh=terminator,0=other)
Note:   This function was not supported by Novell DOS 7 NWCDEX prior to the
          08/16/94 update
--------d-2F1506-----------------------------
INT 2F - CD-ROM - TURN DEBUGGING ON
        AX = 1506h
        BX = debugging function to enable
Note:   reserved for development
SeeAlso: AX=1507h
--------d-2F1507-----------------------------
INT 2F - CD-ROM - TURN DEBUGGING OFF
        AX = 1507h
        BX = debugging function to disable
Note:   reserved for development
SeeAlso: AX=1506h
--------d-2F1508-----------------------------
INT 2F - CD-ROM - ABSOLUTE DISK READ
        AX = 1508h
        ES:BX -> buffer
        CX = drive number (0=A:)
        SI:DI = starting sector number
        DX = number of sectors to read
Return: CF set on error
            AL = error code (0Fh invalid drive,15h not ready)
        CF clear if successful
Note:   returns error 15h (not ready) under Windows95 if the starting sector
          number is less than 10h
SeeAlso: AX=1509h
--------d-2F1509-----------------------------
INT 2F - CD-ROM - ABSOLUTE DISK WRITE
        AX = 1509h
        ES:BX -> buffer
        CX = drive number (0=A:)
        SI:DI = starting sector number
        DX = number of sectors to write
Note:   corresponds to INT 26h and is currently reserved and nonfunctional,
          but could be implemented for CD-R and CD-RW drives
SeeAlso: AX=1508h
--------d-2F150A-----------------------------
INT 2F - CD-ROM - RESERVED
        AX = 150Ah
--------d-2F150B-----------------------------
INT 2F - CD-ROM v2.00+ - DRIVE CHECK
        AX = 150Bh
        CX = drive number (0=A:)
Return: BX = ADADh if MSCDEX.EXE installed
            AX = support status
                0000h if drive not supported
                nonzero if supported
SeeAlso: AX=150Dh
--------d-2F150CBX0000-----------------------
INT 2F - CD-ROM v2.00+ - GET MSCDEX.EXE VERSION (GET VERSION)
        AX = 150Ch
        BX = 0000h
Return: BH = major version
        BL = minor version
Notes:  MSCDEX.EXE versions prior to 2.00 leave BX unchanged, thus BX should
          be 0000h on entry
        Corel's CORELCDX.COM v1.01d returns 2.20, v1.12a returns 2.21
        Meridian Data's CDNETEX.EXE returns its own version number, e.g. 4.70
        J.M.A. Hall's CDEMU2.COM returns 2.10 (it is an MSCDEX emulator for
          networked CD-ROM drives)
        Windows95 returns v2.95
        Novell DOS 7 NWCDEX.EXE returns the same version number reported in
          its startup message
SeeAlso: AX=1500h"CD-ROM",AX=15FFh"CORELCDX"
--------d-2F150D-----------------------------
INT 2F - CD-ROM v2.00+ - GET CD-ROM DRIVE LETTERS
        AX = 150Dh
        ES:BX -> buffer for drive letter list (1 byte per drive)
Return: buffer filled with drive numbers (0=A:).  Each byte corresponds
        to the drive in the same position for function 1501h
SeeAlso: AX=150Bh
--------d-2F150E-----------------------------
INT 2F - CD-ROM v2.00+ - GET/SET VOLUME DESCRIPTOR PREFERENCE
        AX = 150Eh
        BX = subfunction
            00h get preference
                DX = 0000h
                Return: DX = preference settings
            01h set preference
                DH = volume descriptor preference
                    01h = primary volume descriptor
                    02h = supplementary volume descriptor
                DL = supplementary volume descriptor preference
                    01h = shift-Kanji
        CX = drive number (0=A:)
Return: CF set on error
            AX = error code (15=invalid drive,1=invalid function)
        CF clear if successful
--------d-2F150F-----------------------------
INT 2F - CD-ROM v2.00+ - GET DIRECTORY ENTRY
        AX = 150Fh
        CL = drive number (0=A:)
        CH bit 0 = copy flag
                clear if direct copy
                set if copy to structure which removes ISO/High Sierra diffs
        ES:BX -> ASCIZ path name
        SI:DI -> buffer for directory entry (see #02628,#02629)
                must be 255 bytes for direct copy, 285 bytes for canonical
Return: CF set on error
            AX = error code
        CF clear if successful
            AX = disk format (0=High Sierra,1=ISO 9660)
Note:   this function was not supported by Novell DOS 7 NWCDEX prior to the
          08/16/94 update

Format of CD-ROM directory entry (direct copy):
Offset  Size    Description     (Table 02628)
 00h    BYTE    length of directory entry
 01h    BYTE    length of XAR in Logical Block Numbers
 02h    DWORD   LBN of data, Intel (little-endian) format
 06h    DWORD   LBN of data, Motorola (big-endian) format
 0Ah    DWORD   length of file, Intel format
 0Eh    DWORD   length of file, Motorola format
---High Sierra---
 12h  6 BYTEs   date and time
 18h    BYTE    bit flags
 19h    BYTE    reserved
---ISO 9660---
 12h  7 BYTEs   date and time
                (seventh byte is offset from GMT in 15-minute increments)
 19h    BYTE    bit flags
---both formats---
 1Ah    BYTE    interleave size
 1Bh    BYTE    interleave skip factor
 1Ch    WORD    volume set sequence number, Intel format
 1Eh    WORD    volume set sequence number, Motorola format
 20h    BYTE    length of file name
 21h  N BYTEs   file name
        BYTE    (optional) padding if filename is odd length
      N BYTEs   system data
SeeAlso: #02629,#01352

Format of CD-ROM directory entry (canonicalized):
Offset  Size    Description     (Table 02629)
 00h    BYTE    length of XAR in Logical Block Numbers
 01h    DWORD   Logical Block Number of file start
 05h    WORD    size of disk in logical blocks
 07h    DWORD   file length in bytes
 0Bh  7 BYTEs   date and time
 12h    BYTE    bit flags
 13h    BYTE    interleave size
 14h    BYTE    interleave skip factor
 15h    WORD    volume set sequence number
 17h    BYTE    length of file name
 18h 38 BYTEs   ASCIZ filename
 3Eh    WORD    file version number
 40h    BYTE    number of bytes of system use data
 41h 220 BYTEs  system use data
SeeAlso: #02628
--------d-2F1510-----------------------------
INT 2F - CD-ROM v2.10+ - SEND DEVICE DRIVER REQUEST
        AX = 1510h
        CX = CD-ROM drive letter (0 = A, 1 = B, etc)
        ES:BX -> CD-ROM device driver request header (see #02597 at AX=0802h)
Return: CF clear if device driver has been called (check the request header's
              status word to determine whether an error has occurred)
            ES:BX request header updated
        CF set if device driver has not been called
            AX = error code (000Fh = invalid drive, 0001h = invalid function)
            ES:BX request header unchanged
Notes:  MSCDEX initializes the device driver request header's subunit field
          based on the drive number specified in CX
        MSCDEX v2.21 through v2.25 (at least) return error code AX=0001h if
          nested calls are attempted
BUGS:   Novell DOS 7 NWCDEX prior to the 12/13/94 update did not initialize
          the subunit field
        Windows95 sets CF if CX isn't a CD-ROM drive but leaves CF unchanged
          if the drive is in fact a CD-ROM
SeeAlso: AX=0802h
--------d-2F15FFBX0000-----------------------
INT 2F - CD-ROM - CORELCDX - INSTALLATION CHECK
        AX = 15FFh
        BX = 0000h
Return: BX = ABCDh if CORELCDX loaded
Note:   Corel's CORELCDX.COM is a replacement for MSCDEX.EXE; it also supports
          the standard MSCDEX installation check calls AX=1500h and AX=150Ch
SeeAlso: AX=1500h"CD-ROM",AX=150Ch
--------W-2F1600-----------------------------
INT 2F - MS Windows - WINDOWS ENHANCED MODE INSTALLATION CHECK
        AX = 1600h
Return: AL = status
            00h neither Windows 3.x enhanced mode nor Windows/386 2.x running
            01h Windows/386 2.x running
            80h XMS version 1 driver installed (neither Windows 3.x enhanced
                  mode nor Windows/386 2.x running) (obsolete--see note)
            FFh Windows/386 2.x running
        AL = anything else
            AL = Windows major version number >= 3
            AH = Windows minor version number
Notes:  INT 2F/AH=16h comprises an API for non-Windows programs (DOS device
          drivers, TSRs, and applications) to cooperate with multitasking
          Windows/386 2.x and Windows 3.x and higher enhanced mode.
        certain calls are also supported in the Microsoft 80286 DOS extender in
          Windows standard mode
        this function served as the installation check and AX=1610h served to
          get the driver entry point for XMS version 1, which is now obsolete.
          Use AX=4300h and AX=4310h instead
SeeAlso: AX=160Ah,AX=1610h,AX=4300h,AX=4680h
Index:  installation check;XMS version 1
--------W-2F1602-----------------------------
INT 2F - MS Windows/386 2.x - GET API ENTRY POINT
        AX = 1602h
Return: ES:DI -> Windows/386 2.x API procedure entry point
Notes:  this interface is supported in Windows 3.x and Windows95 only for 2.x
          compatibility
        to get the current virtual machine (VM) ID in Windows/386 2.x:
            AX = 0000h
            ES:DI -> return address
            JUMP to address returned from INT 2F/AX=1602h
        After JUMP, at return address:
            BX = current VM ID.
SeeAlso: AX=C020h
--------W-2F1603-----------------------------
INT 2F C - MS Windows/386 - GET INSTANCE DATA
        AX = 1603h
Return: AX = 5248h ('RH') if supported
            DS:SI -> Windows/386 instance data (see #02630)
Notes:  reportedly supported by RM Nimbus MS-DOS 3.3 kernel
        this function is called by DOSMGR when AX=1607h/BX=0015h is not
          supported, as is the case in DOS versions prior to 5.0
        see Geoff Chappell's book _DOS_Internals_ for additional discussions of
          this function, DOSMGR's behavior, and instancing in general
SeeAlso: AX=1607h/BX=0015h

Format of Windows/386 instance data:
Offset  Size    Description     (Table 02630)
 00h    WORD    segment of IO.SYS (0000h = default 0070h)
 02h    WORD    offset in IO.SYS of STACKS data structure (DOS 3.2x)
                0000h if not applicable
 04h    WORD    number of instance data entries (max 32)
 06h    Array of instance data entries
        Offset  Size    Description
         00h    WORD    segment (0002h = DOS kernel)
         02h    WORD    offset
         04h    WORD    size
--------W-2F1605-----------------------------
INT 2F - MS Windows - WINDOWS ENHANCED MODE & 286 DOSX INIT BROADCAST
        AX = 1605h
        ES:BX = 0000h:0000h
        DS:SI = 0000h:0000h
        CX = 0000h
        DX = flags
            bit 0 = 0 if Windows enhanced-mode initialization
            bit 0 = 1 if Microsoft 286 DOS extender initialization
            bits 1-15 reserved (undefined)
        DI = version number (major in upper byte, minor in lower)
Return: CX = 0000h if okay for Windows to load
        CX = FFFFh (other registers unchanged) if Windows 3.0 in standard mode
        CX <> 0 if Windows should not load
        ES:BX -> startup info structure (see #02631)
        DS:SI -> virtual86 mode enable/disable callback or 0000h:0000h
              (see #02634)
Notes:  the Windows enhanced mode loader and Microsoft 286 DOS extender will
          broadcast an INT 2F/AX=1605h call when initializing.  Any DOS device
          driver or TSR can watch for this broadcast and return the appropriate
          values.  If the driver or TSR returns CX <> 0, it is also its
          responsibility to display an error message (however, Windows95 is
          reported to load regardless of the returned CX).
        each handler must first chain to the prior INT 2F handler with
          registers unchanged before processing the call
        if the handler requires local data on a per-VM basis, it must store the
          returned ES:BX in the "next" field of a startup info structure and
          return a pointer to that structure in ES:BX
        a single TSR may set the V86 mode enable/disable callback; if DS:SI is
          already nonzero, the TSR must fail the initialization by setting CX
          nonzero
        MSD checks for Windows 3.0 running in standard mode by testing whether
          CX=FFFFh and other registers are unchanged on return
        Novell DOS v7.0 (Update 8 - Update 11) TASKMGR in multitasking mode
          uses this broadcast, even if TASKMGR.INI sets WinPresent= to OFF
        Microsoft's EMM386.EXE for DOS 5+ when installed with the NOEMS option
          changes its driver name from EMMQXXX0 to EMMXXXX0 while Windows is
          active
SeeAlso: AX=1606h,AX=1608h,AX=4B05h

Format of Windows Startup Information Structure:
Offset  Size    Description     (Table 02631)
 00h  2 BYTEs   major, minor version of info structure
 02h    DWORD   pointer to next startup info structure or 0000h:0000h
 06h    DWORD   pointer to ASCIZ name of virtual device file or 0000h:0000h
 0Ah    DWORD   virtual device reference data (see #02633)
                (only used if above nonzero)
 0Eh    DWORD   pointer to instance data records (see #02632) or 0000h:0000h
---structure version >= 4.0---
 12h    DWORD   pointer to optionally-instanced data records (see #02632)
                  or 0000h:0000h

Format of one Instance Item in array:
Offset  Size    Description     (Table 02632)
 00h    DWORD   address of instance data (end of array if 0000h:0000h)
 04h    WORD    size of instance data
SeeAlso: #02631

Format of Virtual Device Reference Data:
Offset  Size    Description     (Table 02633)
 00h    DWORD   physical address of ??? or 00000000h
 04h    DWORD   physical address of ??? table
 08h    DWORD   "DEST_PAGE" address to which pages must be mapped
 0Ch  N DWORDs  "SRC_PAGE" physical addresses of the pages
                00000000h = end of table
Note:   EMM386.EXE sets the first pointer to the start of the device driver
          chain, the second pointer to a field of 40h bytes followed by a
          16-bit offset to the end of the SRC_PAGE table, and DEST_PAGE to
          the start segment of the UMB area
SeeAlso: #02631

(Table 02634)
Values Windows virtual mode enable/disable procedure is called with:
        AX = 0000h disable V86 mode
        AX = 0001h enable V86 mode
        interrupts disabled
Return: CF set on error
        CF clear if successful
        interrupts disabled
SeeAlso: #02631
--------W-2F1606-----------------------------
INT 2F - MS Windows - WINDOWS ENHANCED MODE & 286 DOSX EXIT BROADCAST
        AX = 1606h
        DX = flags
            bit 0 = 0 if Windows enhanced-mode exit
            bit 0 = 1 if Microsoft 286 DOS extender exit
            bits 1-15 reserved (undefined)
Notes:  if the init broadcast fails (AX=1605h returned CX <> 0), then this
          broadcast will be issued immediately.
        this call will be issued in real mode
        Novell DOS v7.0 (Update 8 - Update 15) TASKMGR in multitasking mode
          uses this broadcast, even if TASKMGR.INI sets WinPresent= to OFF
SeeAlso: AX=1605h,AX=1609h
--------W-2F1607-----------------------------
INT 2F - MS Windows - VIRTUAL DEVICE CALL OUT API
        AX = 1607h
        BX = virtual device ID (see #02642)
        CX = (usually) callout subfunction
Return: (usually) AX,BX,CX,DX,ES contain results
Notes:  more of a convention than an API, this call specifies a standard
          mechanism for Windows enhanced-mode virtual devices (VxD's) to talk
          to DOS device drivers and TSRs
        see below for details on several virtual devices
SeeAlso: AX=1605h,AX=1607h/BX=000Ch,AX=1607h/BX=0014h,AX=1607h/BX=0015h
SeeAlso: AX=1607h/BX=0018h,AX=1684h"DEVICE API",AX=C020h
--------W-2F1607BX0006-----------------------
INT 2F - MS Windows - "V86MMGR" VIRTUAL DEVICE API
        AX = 1607h
        BX = 0006h (VxD identifier of "V86MMGR")
        CX = 0000h
Return: AX = status
            0000h if local A20 state changed
            1607h if A20 unchanged
            other if global A20 state changed
SeeAlso: AX=1607h"CALL OUT API"
--------W-2F1607BX000C-----------------------
INT 2F - MS Windows - "VMD" VIRTUAL MOUSE DEVICE API
        AX = 1607h
        BX = 000Ch (VxD identifier of "VMD")
Return: CX = nonzero if mouse driver already virtualized
Note:   VMD (Virtual Mouse Driver) calls this and then checks whether CX is
          nonzero; if yes, it will not automatically virtualize the mouse
          driver.  This would be used if MOUSE.COM already virtualizes
          itself using the Windows API.
SeeAlso: AX=1607h/BX=0014h,AX=1607h/BX=0015h
--------W-2F1607BX000D-----------------------
INT 2F C - MS Windows95 - "VKD" VIRTUAL DEVICE - ??? CALLOUT
        AX = 1607h
        BX = 000Dh (VxD ID for VKD)
        ???
Return: ???
SeeAlso: AX=1607h"CALL OUT API",#02642
--------W-2F1607BX0010-----------------------
INT 2F C - MS Windows 3.1 - "BLOCKDEV" VIRTUAL HARD DISK DEVICE API
        AX = 1607h
        BX = 0010h (VxD identifier of "BLOCKDEV")
        CX = function
            0001h starting FastDisk compatibility tests
            0002h ending FastDisk compatibility tests
            0003h check if FastDisk installation allowed
                Return: CX = 0000h if allowed
Note:   this interface is called by the Windows FastDisk driver (such as
          WDCTRL) when it thinks that the INT 13h handler immediately below
          IO.SYS's INT 13h code is not in ROM; it should be supported by any
          program which hooks itself underneath IO.SYS's INT 13h code with
          INT 2F/AH=13h
SeeAlso: AX=1607h/BX=0014h,INT 2F/AH=13h
--------W-2F1607BX0014-----------------------
INT 2F - MS Windows - "VNETBIOS" VIRTUAL DEVICE API
        AX = 1607h
        BX = 0014h (VxD identifier of "VNETBIOS")
Return: ES:DI -> 128-byte table specifying VNETBIOS actions for each NetBIOS
                command code (see #02635)
Note:   VNETBIOS (Virtual NetBIOS) calls this function to determine whether
          the NetBIOS has an extensions Windows should know about
SeeAlso: AX=1607h/BX=000Ch,AX=1607h/BX=0010h,AX=1607h/BX=0015h

(Table 02635)
Values for VNETBIOS action code:
 00h    "VN_Unknown" unknown command
 04h    "VN_No_Map"  no memory mapping necessary
 08h    "VN_Map_In"  input buffer is quickly used, so no global mapping needed
 0Ch    "VN_Map_In"  output buffer is quickly used, so no global mapping needed
 10h    "VN_Map_In_Out"  buffer is quickly used, so no global mapping needed
 14h    "VN_Chain_Send"  the chain-send command
 18h    "VN_Cancel"     special case for cancel command
 1Ch    "VN_Buffer_In"  buffer is incoming
 20h    "VN_Buffer_Out" buffer is outgoing
 24h    "VN_Buffer_In_Out" buffer used for both incoming and outgoing data
--------D-2F1607BX0015-----------------------
INT 2F C - MS Windows - "DOSMGR" VIRTUAL DEVICE API
        AX = 1607h
        BX = 0015h (VxD identifier of "DOSMGR")
        CX = function
            0000h query instance processing
                DX = 0000h
                Return: CX = state
                            0000h not instanced
                            other instanced (DOS 5+ kernel returns 0001h)
                                DX = segment of DOS drivers or 0000h for
                                        default of 0070h
                                ES:BX -> patch table (see #02637)
            0001h set patches in DOS
                DX = bit mask of patch requests (see #02636)
                Return: AX = B97Ch
                        BX = bit mask of patches applied (see #02636)
                        DX = A2ABh
            0002h remove patches in DOS (ignored by DOS 5.0 kernel)
                DX = bit mask of patch requests (see #02636)
                Return: CX = 0000h (DOS 5-6)
                Note:   return values are ignored by DOSMGR in Windows 3.1
            0003h get size of DOS data structures
                DX = bit mask of request (only one bit can be set)
                    bit 0: Current Directory Structure size
                Return: if supported request:
                            AX = B97Ch
                            CX = size in bytes of requested structure
                            DX = A2ABh
                        else:
                            CX = 0000h
                            all other registers preserved
            0004h determine instanced data structures
                Return: AX = B97Ch if supported
                        DX = A2ABh if supported (DOS 5+ kernel returns 0000h)
                        BX = bit mask of instanced items
                            bit 0: CDS
                            bit 1: SFT
                            bit 2: device list
                            bit 3: DOS swappable data area
            0005h get device driver size
                ES = segment of device driver
                Return: DX:AX = 0000h:0000h on error (not dev. driver segment)
                        DX:AX = A2ABh:B97Ch if successful
                            BX:CX = size of device driver in bytes
Notes:  DOSMGR (DOS Manager) will check whether the OEM DOS/BIOS data has
          been instanced via this API and will not perform its own default
          instancing of the normal DOS/BIOS data if so; if this API is not
          supported, DOSMGR will also try to access instancing data through
          INT 2F/AX=1603h
        these functions are supported by the DOS 5+ kernel; DOSMGR contains
          tables of instancing information for earlier versions of DOS
        see Geoff Chappell's book _DOS_Internals_ for additional discussions of
          DOSMGR's behavior and instancing in general
SeeAlso: AX=1603h,AX=1605h,AX=1607h/BX=000Ch,AX=1607h/BX=0014h
SeeAlso: AX=1684h"DEVICE API"

Bitfields for DOSMGR patch requests:
Bit(s)  Description     (Table 02636)
 0      enable critical sections
 1      NOP setting/checking user ID
 2      turn INT 21/AH=3Fh on STDIN into polling loop
 3      trap stack fault in "SYSINIT" to WIN386
 4      BIOS patch to trap "Insert disk X:" to WIN386

Format of DOSMGR patch table:
Offset  Size    Description     (Table 02637)
 00h  2 BYTEs   DOS version (major, minor)
 02h    WORD    offset in DOS data segment of "SAVEDS"
 04h    WORD    offset in DOS data segment of "SAVEBX"
 06h    WORD    offset in DOS data segment of InDOS flag
 08h    WORD    offset in DOS data segment of User ID word
 0Ah    WORD    offset in DOS data segment of "CritPatch" table to enable
                  critical section calls (see INT 2A/AH=80h)
 0Ch    WORD    (DOS 5+ only) offset in DOS data segment of "UMB_HEAD",
                  containing segment of last MCB in conventional memory
--------W-2F1607BX0018-----------------------
INT 2F C - MS Windows - "VMPoll" VIRTUAL DEVICE - IDLE CALLOUT
        AX = 1607h
        BX = 0018h (VMPoll VxD ID) (see #02642)
        CX = 0000h
Return: AX = status
            0000h if timeslice used
            nonzero if timeslice not needed
Note:   when VMPoll makes this callout, all virtual machines are idle, and any
          interested TSR can use the opportunity to perform background
          processing
SeeAlso: AX=1607h"CALL OUT API",AX=1689h
--------W-2F1607BX0021--------------------------------------
INT 2F C - MS Windows - "PageFile" VIRTUAL DEVICE - GET LOCK BYTE
        AX = 1607h
        BX = 0021h (PageFile VxD ID)
        CX = 0000h
Return: AX = status
            0000h success
                ES:DI -> cache lock byte in disk cacher
            other no disk cache or unsupported
Notes:  PageFile issues this call on real-mode initialization in order to allow
          disk caches to provide it with a byte which it can use to temporarily
          lock the disk cache; VMPOLL also issues this call, so it is made
          twice each time Windows starts up
        if this call fails, PageFile falls back to other techniques for locking
          the disk cache
SeeAlso: AX=1607h"CALL OUT API"
--------W-2F1607BX002D-----------------------
INT 2F C - MS Windows - "W32S" VIRTUAL DEVICE - ??? CALLOUT
        AX = 1607h
        BX = 002Dh (VxD ID for W32S)
        ???
Return: ???
SeeAlso: AX=1607h"CALL OUT API",#02642
--------W-2F1607BX0040-----------------------
INT 2F C - MS Windows - "IFSMgr" VIRTUAL DEVICE - ??? CALLOUT
        AX = 1607h
        BX = 0040h (VxD ID for IFSMgr)
        ???
Return: ???
SeeAlso: AX=1607h"CALL OUT API",#02642
--------W-2F1607BX0446-----------------------
INT 2F C - MS Windows - "VADLIBD" VIRTUAL DEVICE - ??? CALLOUT
        AX = 1607h
        BX = 0446h (VxD ID for VADLIBD)
        ???
Return: ???
SeeAlso: AX=1607h"CALL OUT API",#02642
--------W-2F1607BX0484-----------------------
INT 2F C - MS Windows - "IFSMgr" VIRTUAL DEVICE - ??? CALLOUT
        AX = 1607h
        BX = 0484h (VxD ID for IFSMgr)
        ???
Return: ???
SeeAlso: AX=1607h"CALL OUT API",#02642
--------W-2F1607BX0487-----------------------
INT 2F C - MS Windows - "NWSUP" VIRTUAL DEVICE - ??? CALLOUT
        AX = 1607h
        BX = 0487h (VxD ID for NWSUP)
        ???
Return: ???
SeeAlso: AX=1607h"CALL OUT API",#02642
--------E-2F1607BX22C0-----------------------
INT 2F C - Rational Systems DOS/4GW - ???
        AX = 1607h
        BX = 22C0h
        ???
Return: ???
SeeAlso: INT 15/AX=BF02h,INT 15/AX=BF04h,#02642
--------W-2F1607BX28A1-----------------------
INT 2F C - MS Windows - "PharLap" VIRTUAL DEVICE - ??? CALLOUT
        AX = 1607h
        BX = 28A1h (VxD ID for PharLap)
        ???
Return: ???
SeeAlso: AX=1607h"CALL OUT API",#02642
--------W-2F1607BX7A5F-----------------------
INT 2F C - MS Windows - "SIWVID" VIRTUAL DEVICE - ??? CALLOUT
        AX = 1607h
        BX = 7A5Fh (VxD ID for SIWVID)
        ???
Return: ???
SeeAlso: AX=1607h"CALL OUT API",#02642
--------W-2F1608-----------------------------
INT 2F C - MS Windows - WINDOWS ENHANCED MODE INIT COMPLETE BROADCAST
        AX = 1608h
Notes:  called after all installable devices have been initialized
        real-mode software may be called between the Windows enhanced-mode init
          call (AX=1605h) and this call; the software must detect this
          situation
SeeAlso: AX=1605h,AX=1609h
--------W-2F1609-----------------------------
INT 2F C - MS Windows - WINDOWS ENHANCED MODE BEGIN EXIT BROADCAST
        AX = 1609h
Note:   called at the beginning of a normal exit sequence; not made in the
          event of a fatal system crash
SeeAlso: AX=1606h,AX=1608h
--------W-2F160A-----------------------------
INT 2F - MS Windows 3.1 - IDENTIFY WINDOWS VERSION AND TYPE
        AX = 160Ah
Return: AX = 0000h if call supported
            BX = version (BH=major, BL=minor)
            CX = mode (0002h = standard, 0003h = enhanced)
SeeAlso: AX=1600h,AX=4680h
--------W-2F160B-----------------------------
INT 2F - MS Windows 3.1 - IDENTIFY TSRs
        AX = 160Bh
        ES:DI = 0000h:0000h
Return: ES:DI -> TSR information structure (see #02638)
Desc:   this call allows Windows-aware TSRs to make themselves known to
          Windows.
Note:   the TSR should first chain to the previous INT 2F handler, then
          allocate a communication structure, place the returned ES:DI
          pointer in the first field, and return a pointer to the new
          structure
SeeAlso: AX=1605h,AX=160Ch,AX=4B01h,AX=4B05h

Format of TSR-to-Windows information structure:
Offset  Size    Description     (Table 02638)
 00h    DWORD   pointer to next structure
 04h    WORD    PSP segment
 06h    WORD    API version ID (0100h)
 08h    WORD    EXEC flags (how to load command specified by "exec_cmd")
                bit 0: "WINEXEC"
                bit 1: "LOADLIBRARY"
                bit 2: "OPENDRIVER"
 0Ah    WORD    "exec_cmd_show" (see #02639)
 0Ch    DWORD   "exec_cmd" pointer to command line to be executed
 10h  4 BYTEs   reserved (0)
 14h    DWORD   pointer to TSR ID block (see #02640)
 18h    DWORD   pointer to TSR data block or 0000h:0000h

(Table 02639)
Values for TSR information structure "exec_cmd_show":
 00h    HIDE
 01h    SHOWNORMAL
 02h    SHOWMINIMIZED
 03h    SHOWMAXIMIZED
 04h    SHOWNOACTIVE
 05h    SHOW
 06h    MINIMIZE
 07h    SHOWMINNOACTIVE
 08h    SHOWNA
 09h    RESTORE
Note:   this value is passed as the second parameter to the WinExec(),
          LoadLibrary(), or OpenDriver() call used to execute a requested
          command line
SeeAlso: #02638

Format of Norton Utilities 6.0 TSR ID block:
Offset  Size    Description     (Table 02640)
 00h    WORD    length of name string
 02h  N BYTEs   name of TSR's executable
SeeAlso: #02638
--------W-2F160C-----------------------------
INT 2F - MS Windows 3.1 - DETECT ROMs
        AX = 160Ch
        ???
Return: ???
Note:   used by ROM Windows; appears to be a NOP under standard Windows95
SeeAlso: AX=160Bh,INT 21/AH=6Dh"ROM"
--------D-2F160E-----------------------------
INT 2F U - MS-DOS 7 kernel - BOOT LOGO SUPPORT???
        AX = 160Eh
        BL = subfunction
            00h get ???
                AX = state of flag manipulated by subfn 04h and 05h
                    0000h clear
                    FFFFh set
                DX = ??? (0000h)
            01h link in INT 10h??? handlers
            02h unlink INT 10h??? handlers
            03h ???
            04h set ??? flag
            05h clear ??? flag
Return: AX = 0000h if supported
            ???
SeeAlso: AX=160Fh,AX=1611h,AX=1614h
--------D-2F160F-----------------------------
INT 2F U - MS-DOS 7 kernel - GET/SET ??? HANDLER
        AX = 160Fh
        BL = subfunction
            00h get ??? handler
                Return: AX = 0000h if supported
                            CX:DX -> handler to which control is passed after
                                      ??? executes
            01h set ??? handler
                CX:DX -> new handler for ???
                Return: AX = 0000h if supported
Notes:  this function is not supported if ??? in the IO.SYS drivers portion of
          the kernel is an IRET instruction (as is the case on my system)
          rather than a FAR JMP
        the indicated handler seems to be related to INT 10 processing
SeeAlso: AX=160Eh,AX=1611h,AX=1614h
--------m-2F1610-----------------------------
INT 2F - XMS v1.x only - GET DRIVER ADDRESS
        AX = 1610h
        details unavailable
Note:   this function and AX=1600h were only used in XMS version 1 and are now
          obsolete.  Use AX=4300h and AX=4310h instead
SeeAlso: AX=1600h,AX=4310h
--------D-2F1611-----------------------------
INT 2F U - MS-DOS 7 kernel - GET SHELL PARAMETERS
        AX = 1611h
Return: AX = 0000h if supported
            DS:DX -> primary shell's executable name
            DS:SI -> prinary shell command line (counted string)
            BH = ??? (00h)
            BL = ??? (00h)
Desc:   return the program name and commandline from the CONFIG.SYS SHELL=
          statement
SeeAlso: AX=160Eh,AX=160Fh,AX=1612h,AX=4A33h
--------D-2F1612-----------------------------
INT 2F U - MS-DOS 7 kernel - GET ???
        AX = 1612h
Return: AX = 0000h if supported
            ES:BX -> ??? data (see #02641)
Note:   called by VTD.VXD
SeeAlso: AX=160Fh,AX=1611h,AX=1613h

Format of DOS7 ??? kernel data:
Offset  Size    Description     (Table 02641)
 00h    WORD    ??? (0001h)
 02h    DWORD   -> ??? function (call with DS=high word of this field)
                the indicated function vectors through the INT 13 hook at
                  0070h:00B4h and then forces the A20 gate open
        ???
--------D-2F1613-----------------------------
INT 2F - MS-DOS 7 kernel - GET SYSTEM.DAT (REGISTRY FILE) PATHNAME
        AX = 1613h
        ES:DI -> buffer for full ASCIZ pathname to Windows95 SYSTEM.DAT
        CX = buffer size in bytes
Return: AX = 0000h if supported
            ES:DI buffer filled
            CX = number of bytes copied into buffer
SeeAlso: AX=160Eh,AX=1611h,AX=1612h,AX=1614h,AX=1690h
--------D-2F1614-----------------------------
INT 2F U - MS-DOS 7 kernel - SET SYSTEM.DAT (REGISTRY FILE) PATHNAME
        AX = 1614h
        ES:DI -> ASCIZ pathname to Windows95 SYSTEM.DAT
Return: AX = status
            0000h if successful
            1614h not supported
            other: maximum length of pathname (004Eh for v4.00.950)
SeeAlso: AX=160Eh,AX=1611h,AX=1613h,AX=1690h
----------2F1615-----------------------------
INT 2F - Windows95 - SAVE32.COM - INSTALLATION CHECK
        AX = 1615h
Return: AX = 0000h if installed
            BX = segment of resident code
Program: SAVE32.COM is a TSR included in the Windows95 distribution which
          preserves the contents of 32-bit registers across invocations of
          all of the hardware interrupt handlers (which, for some older BIOSes
          and TSRs, do not properly preserve the high words of the 32-bit
          registers)
--------W-2F1680-----------------------------
INT 2F - MS Windows, DPMI, various - RELEASE CURRENT VIRTUAL MACHINE TIME-SLICE
        AX = 1680h
Return: AL = status
            00h if the call is supported
            80h (unchanged) if the call is not supported
Notes:  programs can use this function in idle loops to enhance performance
          under multitaskers; this call is supported by MS Windows 3+, DOS 5+,
          DPMI 1.0+, and in OS/2 2.0+ for multitasking DOS applications
        does not block the program; it just gives up the remainder of the time
          slice
        should not be used by Windows-specific programs
        when called very often without intermediate screen output under
          MS Windows 3.x, the VM will go into an idle-state and will not
          receive the next slice before 8 seconds have elapsed. This time can
          be changed in SYSTEM.INI through "IdleVMWakeUpTime=<seconds>".
          Setting it to zero results in a long wait.
        this function has no effect under OS/2 2.10-4.0 if the DOS box has an
          "Idle Sensitivity" setting of 100
SeeAlso: AX=1689h,INT 15/AX=1000h,INT 15/AX=5305h,INT 21/AH=89h,INT 7A/BX=000Ah
--------W-2F1681-----------------------------
INT 2F - MS Windows 3+ - BEGIN CRITICAL SECTION
        AX = 1681h
Notes:  used to prevent a task switch from occurring
        should be followed by an INT 2F/AX=1682h call as soon as possible
        nested calls are allowed, and must be followed by an appropriate number
          of "end critical section" calls
        not supported in Windows/386 2.x. Get INDOS flag with INT 21/AH=34h and
          increment by hand.
SeeAlso: AX=1682h,INT 15/AX=101Bh,INT 21/AH=34h
--------W-2F1682-----------------------------
INT 2F - MS Windows 3+ - END CRITICAL SECTION
        AX = 1682h
Notes:  not supported in Windows/386 2.x.  Get InDOS flag with INT 21/AH=34h
          and decrement by hand, taking care not to decrement InDOS flag
          through zero
SeeAlso: AX=1681h,INT 15/AX=101Ch,INT 21/AH=34h
--------W-2F1683-----------------------------
INT 2F - MS Windows 3+ - GET CURRENT VIRTUAL MACHINE ID
        AX = 1683h
Return: BX = current virtual machine (VM) ID
Notes:  Windows itself currently runs in VM 1, but this can't be relied upon
        VM IDs are reused when VMs are destroyed
        an ID of 0 will never be returned
SeeAlso: AX=1684h"DEVICE API",AX=1685h,AX=168Bh
--------W-2F1684-----------------------------
INT 2F - MS Windows - GET DEVICE API ENTRY POINT
        AX = 1684h
        BX = virtual device (VxD) ID (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point, or 0:0 if the VxD does not support an API
Note:   some Windows enhanced-mode virtual devices provide services that
          applications can access.  For example, the Virtual Display Device
          (VDD) provides an API used in turn by WINOLDAP.
SeeAlso: AX=1684h/BX=0001h,AX=1684h/BX=0015h,AX=1683h,AX=4011h,INT 20"Windows"

(Table 02642)
Values for MS Windows VxD ID:
Value   Name   CallOut V86 PM   Description
 0000h  ACT200L                 IrDA Infrared ActiSys framer VxD
 0000h  ACT220L                 IrDA Infrared ActiSys 220 framer VxD
 0000h  ADAPTEC                 IrDA Infrared Adaptec framer VxD
 0000h  AM1500T         N  N    (Win95)
 0000h  ATI             N  N    (Win95) ATI display driver
 0000h  CDFS            N  N
 0000h  CDTSD           N  N    (Win95) CD-ROM Type-Specific Driver
 0000h  CE2NDIS3        N  N    (W4Wg)
 0000h  CENDIS          N  N    (W4Wg)
 0000h  CHIPS           N  N    (Win95) Chips&Tech display driver
 0000h  CIRRUS          N  N    (Win95) Cirrus display driver
 0000h  CTNDW           N  N    (W4Wg)
 0000h  CTVSD           N  N    (Win95) CD-ROM Vendor-Specific Driver
 0000h  CM2NDIS3        N  N    (W4Wg)
 0000h  COMBUFF         N  N    (Win95)
 0000h  COMPAQ          N  N    (Win95) Compaq display driver
 0000h  CPQNDIS3        N  N    (W4Wg)
 0000h  CRYSTAL                 IrDA Infrared Crystal framer VxD
 0000h  CWCENUM         N  N    (Win95SR2???)
 0000h  CWCSPUD3        N  N    (Win95SR2???)
 0000h  DBKVSSD         N  N    (Win95) Databook PCMCIA socket services???
 0000h  DDOM95          N  N
 0000h  DECLAN          N  N    (W4Wg)
 0000h  DiskTSD         N  N    (Win95) hard-disk Type-Specific Driver
 0000h  DiskVSD         N  N    (Win95) hard-disk Vendor-Specific Driver
 0000h  DMICTVXD        N  N
 0000h  DMMDVDX         N  N    Diamond MaximumDVD
 0000h  DRVSPACX        N  N    (Win95)
 0000h  E30N3           N  N    (W4Wg)
 0000h  E31N3           N  N    (W4Wg)
 0000h  EE16            N  N    (W4Wg)
 0000h  EISA            N  N    (Win95)
 0000h  EL59X           N  N    (Win95)
 0000h  ELNK16          N  N    (W4Wg)
 0000h  ELNK3           N  N    (Win95)
 0000h  ELNKII          N  N    (W4Wg)
 0000h  ELNKMC          N  N    (W4Wg)
 0000h  ELPC3           N  N    (W4Wg)
 0000h  ENABLE2         N  N    (Win95)
 0000h  ENABLE4         N  N    (Win95)
 0000h  EPRO            N  N    (Win95)
 0000h  ES1488V         N  N    (Win95)
 0000h  ES1688V         N  N    (Win95)
 0000h  ES488V          N  N    (Win95)
 0000h  ES688V          N  N    (Win95)
 0000h  ESI                     IrDA Infrared ESI framer VxD
 0000h  FILEMON         N  N    DOS386 File Monitor
 0000h  FLS1MTD         N  N    (Win95) flash-memory driver???
 0000h  FLS2MTD         N  N    (Win95) flash-memory driver???
 0000h  HPEISA          N  N    (W4Wg)
 0000h  HPFEND          N  N    (W4Wg)
 0000h  HPISA           N  N    (W4Wg)
 0000h  HPMCA           N  N    (W4Wg)
 0000h  HSFLOP          N  N
 0000h  IBMTOK          N  N    (W4Wg)
 0000h  IBMTOK4         N  N    (Win95)
 0000h  IRCOMM                  IrDA Infrared Virtual COM/LPT driver
 0000h  IRLAMPEX                IrDA Infrared Protocol VxD
 0000h  IRLAPFRM                IrDA Infrared Virtual COM/LPT frame driver
 0000h  IRMATRAK        N  N    (W4Wg)
 0000h  JAVASUP         N  N    Internet Explorer JAVA support
 0000h  KEYREMAP        N  N    (Windows95 PowerToys) shift-key remapper
 0000h  LPT          N  N  N    (Win4Workgroups 3.11) DOS386 LPT Device
 0000h  LPTENUM         N  N
 0000h  MONVSD
 0000h  MGA             N  N    (Win95) Matrox MGA display driver
 0000h  MSMINI          N  N    (Win95)
 0000h  MSODISUP     N  N  N    (Win4Workgroups 3.11) MS ODI Support
 0000h  mvpas           N  N    (Win95) Pro Audio Spectrum driver
 0000h  NECATAPI        N  N    (Win95)
 0000h  NICE            N  N    (Win95)
 0000h  NV3             N  N    (Win95SR2)
 0000h  NWNBLINK     N  N  N    (Win4Workgroups 3.11) Netware NetBIOS
 0000h  OAK             N  N    (Win95) Oak Tech display driver
 0000h  OCTK32          N  N    (W4Wg)
 0000h  OTCETH          N  N    (W4Wg)
 0000h  PARALINK        N  N    (Win95)
 0000h  PARALLAX                IrDA Infrared Parallax framer VxD
 0000h  PCNTN3          N  N    (W4Wg)
 0000h  PE3NDIS         N  N    (W4Wg)
 0000h  PPM             N  N    (Win95)
 0000h  PROTEON         N  N    (W4Wg)
 0000h  QEMMFix         N  N
 0000h  QIC117          N  N    (Win95) QIC-117 floppy-ctrl tape drive
 0000h  QPI             N  N    QEMM Programming Interface (see INT 67/AH=3Fh)
 0000h  RMM             N  N    Real-Mode Mapper for hw with real-mode drivers
 0000h  S3              N  N    (Win95) S3 display driver
 0000h  S3INFO          N  N
 0000h  S3MINI          N  N    S3 display driver
 0000h  SAGE            N  N    (Plus!) System Agent
 0000h  scsi1hlp        N  N    (Win95)
 0000h  SERENUM         N  N
 0000h  SERIAL       N  N  N    (Win4Workgroups 3.11) DOS386 Serial Device
 0000h  SERWAVE         N  N
 0000h  SETP3           N  N    (Win95) Silicon Ethernet Pocket Adapter
 0000h  SMARTVSD        N  N    (EZ-SMART???)
 0000h  SMC8000W        N  N    (W4Wg)
 0000h  SMC80PC         N  N    (W4Wg)
 0000h  SMC8100W        N  N    (W4Wg)
 0000h  SMC8232W        N  N    (W4Wg)
 0000h  SMC9000         N  N    (W4Wg)
 0000h  SNIP            N  N    (W4Wg)
 0000h  SOCKET          N  N    (W4Wg)
 0000h  SOCKETSV        N  N    (Win95)
 0000h  SPAP            Y  Y    (Win95)
 0000h  SPENDIS         N  N    (Win95)
 0000h  SRAMMTD         N  N    (Win95) flash-memory driver???
 0000h  STLTH64         N  N    Diamond Stealth64 driver
 0000h  STLTHMON        N  N
 0000h  T20N3           N  N    (W4Wg)
 0000h  T30N3           N  N    (W4Wg)
 0000h  TCTOK           N  N    (W4Wg)
 0000h  TSENG           N  N    (Win95) Tseng Labs display driver
 0000h  UBNEI           N  N    (W4Wg)
 0000h  UNIMODEM                (Win95) Universal Modem Driver
 0000h  VDEF            N  N    (Win95)
 0000h  VGATEWAY        N  Y    (Win95) dialin gateway
 0000h  VIDEO7          N  N    (Win95) Video7 display driver
 0000h  VRomD           N  N    (Win95)
 0000h  VStDspcD                Quarterdeck Stealth D*Space
 0000h  VXDMON
 0000h  WD              N  N    (Win95)
 0000h  WINTOP          N  N    (Windows95 Power Toys)
 0000h  WSHTCP          N  N
 0000h  XGA             N  N    (Win95) XGA display driver
 0001h  VMM             N  N    Virtual Machine Manager
 0001h  VMM             Y  Y    Windows95 Virtual Machine Manager
 0002h  Debug
 0003h  VPICD           Y  Y    Virtual Prog. Interrupt Controller (PIC) Device
 0004h  VDMAD           N  N    Virtual Direct Memory Access (DMA) Device
 0005h  VTD             Y  Y    Virtual Timer Device
 0006h  V86MMGR      Y  N  N    (Windows3.x) Virtual 8086 Mode Device
 0006h  V86MMGR         N  Y    (Win95) Virtual 8068 Mode Device
 0007h  PageSwap        N  N    Paging Device
 0008h  Parity          N  N    Parity-check trapper
 0009h  Reboot          N  Y    Ctrl-Alt-Del handler
 000Ah  VDD             N  Y    Virtual Display Device (GRABBER)
 000Bh  VSD             N  N    Virtual Sound Device
 000Ch  VMD          Y  Y  Y    Virtual Mouse Device
 000Dh  VKD             N  Y    Virtual Keyboard Device
 000Eh  VCD             N  Y    Virtual COMM Device
 000Fh  VPD             N  Y    Virtual Printer Device
 0010h  VHD                     Virtual Hard Disk Device (Windows 3.0)
 0010h  BLOCKDEV     Y  N  N    Virtual Hard Disk Device (Windows 3.1)
 0010h  IOS          N  N  N    (Win4Workgroups 3.11) DOS386 IOS Device
 0010h  IOS             Y  Y    Windows95 I/O Supervisor
 0011h  VMCPD           Y  Y    (Windows3.x) Virtual Math CoProcessor Device
 0011h  VMCPD           N  Y    (Win95) Virtual Math CoProcessor Device
 0012h  EBIOS           N  N    Reserve EBIOS page (e.g., on PS/2)
 0013h  BIOSXLAT        N  N    Map ROM BIOS API between prot & V86 mode
 0014h  VNETBIOS     Y  N  N    Virtual NetBIOS Device
 0015h  DOSMGR       Y  Y  N    DOS data instancing (see #02656)
 0016h  WINLOAD
 0017h  SHELL           N  Y    (Windows3)
 0017h  SHELL           Y  Y    (Win95)
 0018h  VMPOLL       Y  N  N
 0019h  VPROD
 001Ah  DOSNET          N  N    assures network integrity across VMs
 001Ah  VNETWARE        Y  Y    Novell NetWare DOSNET replacement
 001Bh  VFD             N  N    Virtual Floppy Device
 001Ch  VDD2                    Secondary display adapter
 001Ch  LoadHi          N  N    Netroom LoadHi Device (RMLODHI.VXD)
 001Ch  LoadHi          N  N    386MAX LoadHi Device (386MAX.VXD)
 001Ch  LoadHi          N  N    Win386 LoadHi Device (EMM386.EXE)
 001Dh  WINDEBUG        N  Y
 001Dh  TDDebug         N  Y
 001Eh  TSRLoad                 TSR instance utility
 001Fh  BiosHook                BIOS interrupt hooker VxD
 0020h  Int13        N  N  N
 0021h  PageFile     Y  N  Y    Paging File device
 0022h  SCSI
 0022h  APIX            N  Y    (Win95)
 0023h  MCA_POS                 Microchannel Programmable Option Select
 0024h  SCSIFD                  SCSI FastDisk device
 0025h  VPEND                   Pen device
 0026h  APM                     Advanced Power Management
 0026h  VPOWERD         Y  Y    (Win95) power management
 0027h  VXDLDR       N  Y  Y    (Win4Wg 3.11/Win95) VXD Loader
 0028h  NDIS         N  Y  Y    (Win4Wg 3.11) Network Driver Interface Spec
 0029h  ???
 002Ah  VWIN32          N  Y    (Win95)
 002Bh  VCOMM        N  Y  Y    (Win4Workgroups 3.11) DOS386 VCOMM Device
 002Ch  SPOOLER         N  N    Windows95 print spooler
 002Dh  W32S         Y  N  Y    WIN32s 32-bit extension to Windows API
 002Eh  ???
 002Fh  ???
 0030h  MACH32       N  N  Y    ATI Mach32 video card
 0031h  NETBEUI      N  N  N    (Win4Workgroups 3.11) NETBEUI
 0032h  SERVER       N  Y  Y    (Win4Workgroups 3.11) Int21 File Server
 0032h  VSERVER         N  Y    (Win95) Int21 File Server
 0033h  CONFIGMG        Y  Y    (Win95)
 0033h  EDOS            N  N    Windows DOS Box Enhancer by Mom's Software
 0034h  DWCFGMG.SYS     Y       DOS Plug-and-Play configuration manager
 0035h  SCSIPORT        N  N    (Win95) virtualized access to SCSI adapter
 0036h  VFBACKUP        Y  Y    (Win95)
 0037h  ENABLE          Y  Y    (Win95)
 0038h  VCOND           Y  Y    (Win95)
 0039h  ???
 003Ah  VPMTD        N  N  Y    (Win4Workgroups 3.11) IFAX Scheduler Device
 003Bh  DSVXD           Y  N    DoubleSpace VxD from MS-DOS v6.x
 003Ch  ISAPNP          N  N    (Win95)
 003Dh  BIOS            Y  Y    (Win95)
 003Eh  WSOCK           Y  Y    (Win95) WinSock
 003Fh  WSIPX           N  N    (Win95) IPX WinSock
 0040h  IFSMGR          N  N    (Win95)
 0041h  VCDFSD          N  N    (Win95) CD-ROM File System Driver (MSCDEX)
 0042h  MRCI2           N  N    (Win95) DriveSpace3
 0043h  PCI             N  N    (Win95)
 0048h  PERF            N  N    (Win95)
 004Ah  MTRR            N  N    (Win95SR2) PPro/P-II MTRR enumerator???
 004Bh  NTKERN          N  Y    (Win95SR2)
 0051h  ISAPNP          N  N    (Win95) ISA Plug-and-Play manager
 008Dh  ESDI_506        N  N    (Win95) MFM/RLL/ESDI disk driver
 0090h  voltrack        N  N    (Win95) Volume Tracker
 00FDh  FAKEIDE         N  N    (Chicago)
 0102h  CV1             N  N    Microsoft C/C++ 7.00+ CodeView for Windows
 011Fh  VFLATD          N  Y    (Win95)
 0200h  VIPX            Y  Y    NetWare Virtual IPX Driver
 0200h  VTEMPD                  dummy template driver by Ray Patch
 0201h  VNWLSERV        N  N    NetWare Lite 1.1 Server (SERVER.EXE)
 0202h  WINICE          Y  Y    SoftICE/W
 0202h  SICE            Y  Y
 0203h  VCLIENT         N  Y    NetWare Lite 1.1+ Client
 0205h  VCAFT           N  N    Novell Virtual CAFT Driver (LANalyzer for Win)
 0205h  BCW             Y  Y    Nu-Mega Bounds Checker for Windows
 0206h  VTXRX           N  N    Novell Virtual TXRX Driver (LANalyzer for Win)
 0207h  DPMS         N  Y  N    Novell DOS Protected Mode Services
 0234h  VCOMMUTE        Y  Y    PC Tools Commute
 0442h  VTDAPI          N  Y    MMSys Win386 VTAPI Device
 0443h  ???
 0444h  VADMAD                  Autoinitialize DMA (Windows 3.0)
 0445h  VSBD            Y  Y    WinResKit: Sound Blaster Device
 0446h  VADLIBD      Y  Y  Y    MMSys Win386 AdLib Device (v3.x)
 0447h  ???
 0448h  SETULTRA                Gravis UltraSound setup
 0449h  vjoyd           N  Y    (Win95) joystick
 044Ah  mmdevldr        Y  Y    (Win95)
 044Bh  ???
 044Ch  msmpu401        N  N    (Win95) MPU-401 MIDI driver
 044Ch  cwdmidi         Y  Y    (Crystal???) MIDI driver
 044Dh  msopl           N  N    (Win95) OPL-3 (SoundBlaster FM) driver
 044Eh  mssblst         N  N    (Win95) SoundBlaster MIDI driver
 045Dh  VflatD          N  Y    dva.386, part of WIN32s
 045Eh  ???
 045Fh  mssndsys                Microsoft Sound System audio driver
 045Fh  azt16           Y  Y    Aztech Sound Galaxy 16 audio driver
 0460h  UNIMODEM        N  Y    Universal Modem driver
 0480h  VNetSup      N  Y  Y    (Win4Workgrps 3.11) Virtual Network Support
 0481h  VRedir       N  N  N    (Win4Workgroups 3.11) Redirector File System
 0481h  VREDIR          N  N    (Win95) Redirector File System driver
 0482h  VBrowse         Y  Y    Win386 Virtual Browser
 0482h  SNAPVXD         Y  Y    (Win95)
 0483h  VSHARE          N  N    (Win4Workgroups) Virtual SHARE
 0483h  VSHARE          Y  Y    (Win95) Virtual SHARE
 0484h  IFSMgr       Y  N  Y    (Win4Wg 3.11) Installable File System Manager
 0485h  ???                     ???
 0486h  VFAT         N  Y  Y    (Win4Workgroups 3.11) Win386 HPFS Driver
 0487h  NWLINK          Y  Y    Win386 Virtual Packet Exchange Protocol
 0487h  NWSUP        Y  N  N    NetWare Vnetbios shim
 0488h  VTDI            N  N    (Win95)
 0489h  VIP             Y  N    (Win95)
 0489h  FTCVIP          Y  Y    Frontier Technologies' VIP
 048Ah  VTCP            Y
 048Ah  MSTCP           Y  N    (Win95) TCP stack
 048Ah  FTCTDI          Y  Y    Future Technologies' TCP stack
 048Bh  VCache       N  Y  Y    (Win4Workgroups 3.11) Virtual File Cache
 048Bh  VCACHE          Y  Y    (Win95) disk cache
 048Ch  ???                     ???
 048Dh  RASMAC          Y  Y    enhanced mode Win4Workgroups RASMAC device
 048Eh  NWREDIR         Y  Y    (Win95)
 048Fh  ???                     ???
 0490h  ???                     ???
 0491h  FILESEC                 (Win95) File Access Control Manager
 0492h  NWSERVER                (Win95)
 0493h  SECPROV                 (Win95) Security Provider
 0494h  NSCL            Y  Y    (Win95)
 0495h  AFVXD           N  N    (Win95)
 0496h  NDIS2SUP                (W4Wg???)
 0497h  MSODISUP        N  N    (W4Wg???)
 0498h  Splitter        N  N    (Win95)
 0499h  PPPMAC          Y  Y    (Win95)
 049Ah  VDHCP           Y  Y    (Win95)
 049Bh  VNBT            Y  Y    (Win95) NetBIOS-over-TCP/IP driver
 049Ch  ???
 049Dh  LOGGER                  (Win95)
 04A2h  IRLAMP                  IrDA Infrared Enumerator VxD
 097Ch  PCCARD          N  Y    (Win95) (see INT 20/VxD=097Ch)
 1020h  VCV                     Microsoft C/C++ 7.00 CodeView
 1021h  VMB             Y  Y    Microsoft C/C++ 7.00 WXSRVR
 1022h  Vpfd            Y  Y    Microsoft C/C++ 7.00
 1025h  MMD             Y  Y    Microsoft C/C++ 8.00, Visual C/C++ 1.00
 2020h  PIPE            Y  Y    by Thomas W. Olson, in Windows/DOS DevJrn 5/92
 21EAh  VADLIBWD        N  Y    Adlib Waveform Driver by John Ridges
 2200h  VFINTD          Y  Y    Norton VFINTD (Norton Desktop)
 22C0h  ???          Y          Rational Systems DOS/4GW ???
 2402h  ZMAX            N  N    Qualitas 386MAX v7 DOSMAX handler
 24A0h  VNSS            N  Y    Norton Screen Saver (Norton Desktop)
 24A1h  VNDWD           Y  Y    Norton VNDWD Device (Norton Desktop)
 24A2h  SYMEvent        Y  Y    Norton Utilities v8
 2540h  VILD            Y  N    INTERLNK client from MS-DOS v6.x
 2640h  VASBID          N  Y    WinResKit: Artisoft Sounding Board Device
 2860h  COMMTASK     N  N  Y    Windows 386-mode preemptive tasker by James
                                  A. Kenemuth of Interabang Computing
 28A0h  PHARLAPX        Y       PharLap inter-VM communications DLL
 28A1h  PharLap      Y  Y  Y    PharLap 386|DOS-Extender DOSXNT.386
 28C0h  VXD          N  Y  Y    Generic VxD for real and protected mode by
                                  Andrew Schulman in MSJ February 1993
 28C1h  PUSHKEYS                VKD_Force_Keys device
 28C2h  VCR3D                   Virtual CR3, by A.Schulman in MSJ October 1992
 2925h  EDOS            Y  Y    Enhanced DOS by Firefly Software
 292Dh  VSBPD           Y  Y    Sound Blaster Pro
 295Ah  GRVSULTR        Y  Y    Gravis UltraSound / UltraSound ACE
 3048h  FTCTCPIP        N  Y    Frontier Technologies' TCP/IP stack
 3049h  ???                     (called by FNFSC32.VXD, FrontierTech's VNFSD)
 304Ch  DWCFGMG.SYS     Y       Plug-and-Play configuration access
 3098h  VstlthD      N  N  N    for QEMM Stealth ROM mode
 3099h  VVidramD        Y  N    for QEMM VIDRAM support
 30F6h  WSVV            N  Y    (Win95) WinSock for Voice-View Modems???
 310Eh  WPS             N  Y    MS DevNet CD-ROM: Windows Process Status
 3110h  VGSSD           Y  Y    VSGLX16.386 for Aztech Sound Galaxy 16
 313Bh  PMC                     Power Management Coordinator
 318Ah  LMOUSE          Y  Y    (Win95) Logitech mouse???
 31CFh  STAT.386                Ton Plooy's processor statistics VxD
 3202h  VdspD           N  N    (Win95)
 3203h  vpasd           N  N    (Win95) Pro Audio Spectrum driver
 32A4h  SBAWE           Y  Y    (Win95) SoundBlaster AWE driver
 32A5h  VSB16           N  N    (Win95) SoundBlaster 16 driver
 32CBh  VFRAD           Y  Y    Dr.Franz - Simultan's diagnotics VFRAD.386
 32DCh  NV3RM           N  Y    (Win95SR2)
 3354h  Discover        N  Y    (Nuts&Bolts) Discover
 33AAh  DECCORE         Y  Y    (Win95) DEC Pathworks core VxD
 33B4h  DECLICL         N  N    (Win95)
 33F0h  VIWD            Y  Y    Gravis UltraSound Plug-n-Play Interwave v1.x
 33FCh  ASPIENUM        N  N    (Win95)
 34DCh  MAGNARAM        N  Y    Quarterdeck MagnaRAM (MAGNA31.VXD/MAGNA95.VXD)
 357Eh  DSOUND          Y  Y    (Win95) DirectSound
 3584h  VSNDSYS         Y  Y    (Win95SR2)
 35C5h  LUGEPS          Y  Y    Lugaru's Epsilon editor
 36AEh  AIB-PC.386      Y  Y    Sunset Laboratory interface hardware driver
 377Bh  MX1501HAD               Cherry keyboard chipcard reader
 38BEh  Vheapx          N  Y    (Nuts&Bolts) Virtual Heap Expander
 38C0h  Bombshel        N  Y    (Nuts&Bolts) Bombshelter
 38DAh  VIWD            Y  Y    UltraSound PnP InterWave driver v2.0beta
 39E6h  A3D             N  N    (Win95SR2)
 3BFCh  CWCSPUD         N  N    (Win95SR2)
 3BFDh  CWCPROXY        N  N    (Win95SR2)
 3BFEh  CWCMMSYS        N  Y    (Win95SR2)
 3BFFh  CWCDSND         N  N    (Win95SR2)
 3C78h  VGARTD          N  N    (Win95SR2)
 3EE5h  WINTEL.VXD              "WinTel" Windows remote-control program
                                (see also PORT 063Eh)
 4321h  POSTMSG         Y  Y    (see #02712)
 4321h  VPCD            N  N    PCache
 4321h  avvxp500        N  N    (Win95) VxP500 driver
 6001h  REGVXD          Y  Y    Windows95 Registry Monitor helper
 7A5Fh  SIWVID       Y  Y  Y    Soft-ICE for Windows video driver
 7FE0h  VSWITCHD        Y  N    by Jeff Prosise
 7FE0h  VWFD         N  Y  Y    reports windowed/fullscreen state; by Neil
                                  Sandlin of Microsoft, shipped with ANSIPLUS
 7FE1h  VWATCHD      N  Y  Y    basic driver w/ no functionality except tracing
                                  by Keith Jin of Microsoft PSS
 7FE5h  VFINTD       N  Y  Y    Virtual Floppy Interrupt trapper by Neil
                                  Sandlin of Microsoft
 7FE7h  VMPAGES      N  Y  Y    demonstration of exporting VxD services, by
                                  Neil Sandlin of Microsoft
 7FE8h  VPOSTD          Y  Y    PostMessage() demo by Curtis J. Palmer of MS
 7FE9h  VIdleD       N  N  N    demonstration of Call_When_Idle function, by
                                  Bernie McIlroy of Microsoft
 7FEBh  VMIOD        N  N  N    Virtual Monitor I/O Traffic Device, by Neil
                                  Sandlin of Microsoft
 7FEDh  VMIRQD       N  N  N    Virtual Monitor IRQ Traffic Device, by Neil
                                  Sandlin of Microsoft
 8888h  VbillD                  Bill Potvin II's for reversing Compaq LTE video
 EEEEh  VEPSD           N  N    Virtual Extended Paging Services for
                                  Borland C++ v4.0
Notes:  The high bit of the VxD ID is reserved for future use. Originally,
          the next 10 bits were the OEM number which was assigned by Microsoft,
          and the low 5 bits were the device number.  Currently, Microsoft
          assigns VxD IDs individually for each driver; send blank email to
          vxdid@microsoft.com for more information.
        "CallOut"=Y indicates that the VxD uses the INT 2F/AX=1607h/BX=VxDID
          device callout interface; "PM" and "V86" indicate whether the VxD
          provides an API entry point in protected mode and Virtual-86 mode
          (e.g. DOS boxes)
--------W-2F1684BX0001-----------------------
INT 2F - MS Windows95 - VMM - GET API ENTRY POINT
        AX = 1684h
        BX = 0001h (virtual device ID for VMM) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02643)
                  0000h:0000h if the VxD does not support an API
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02643)
Call Windows VMM 16-bit entry point with:
        AX = function number
            ---registry functions---
            0100h "RegOpenKey"
                STACK:  DWORD   -> DWORD for returned key handle
                        DWORD   -> ASCIZ registry key name
                        DWORD   HKEY (see #02644)
            0101h "RegCreateKey"
                STACK:  DWORD   -> DWORD for returned key handle
                        DWORD   -> ASCIZ registry key name
                        DWORD   HKEY (see #02644)
            0102h "RegCloseKey"
                STACK:  DWORD   key handle from RegOpenKey or RegCreateKey
            0103h "RegDeleteKey"
                STACK:  DWORD   -> ASCIZ registry key name
                        DWORD   HKEY (see #02644)
            0104h "RegSetValue"
                STACK:  DWORD   ???
                        DWORD   -> ???
                        DWORD   ???
                        DWORD   -> ???
                        DWORD   HKEY (see #02644)
            0105h "RegQueryValue"
                STACK:  DWORD   -> DWORD for ???
                        DWORD   -> ASCIZ ???
                        DWORD   -> ASCIZ ???
                        DWORD   HKEY (see #02644)
            0106h "RegEnumKey"
                STACK:  DWORD   ???
                        DWORD   -> ASCIZ ???
                        DWORD   ???
                        DWORD   HKEY (see #02644)
            0107h "RegDeleteValue"
            0108h "RegEnumValue"
                STACK:  DWORD   -> DWORD for ???
                        DWORD   -> BYTE ???
                        DWORD   -> DWORD for ???
                        DWORD   -> DWORD for ???
                        DWORD   -> DWORD for ???
                        DWORD   -> ASCIZ ???
                        DWORD   ???
                        DWORD   HKEY (see #02644)
            0109h "RegQueryValueEx"
            010Ah "RegSetValueEx"
            010Bh "RegFlushKey"
            010Ch "RegLoadKey"
            010Dh "RegUnLoadKey"
            010Eh "RegSaveKey"
            010Fh "RegRestore"
            0110h "RegRemapPreDefKey"
Return: parameters popped from stack
        DX:AX = return value

(Table 02644)
Values for Windows95 VMM predefined HKEY values:
 80000000h      HKEY_CLASSES_ROOT
 80000001h      HKEY_CURRENT_USER
 80000002h      HKEY_LOCAL_MACHINE
 80000003h      HKEY_USERS
 80000004h      HKEY_PERFORMANCE_DATA
 80000005h      HKEY_CURRENT_CONFIG
 80000006h      HKEY_DYN_DATA
SeeAlso: #02643
--------W-2F1684BX0003-----------------------
INT 2F - MS Windows - VPICD - GET API ENTRY POINT
        AX = 1684h
        BX = 0003h (virtual device ID for VPICD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02645)
                  0000h:0000h if the VxD does not support an API
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02645)
Call VPICD API entry point with:
        EAX = function number
            0000h get version
                Return: AX = binary version (AH=major, AL=minor)
            0001h virtualize timer???
            0002h unvirtualize timer???
--------W-2F1684BX0005-----------------------
INT 2F - MS Windows - VTD - GET API ENTRY POINT
        AX = 1684h
        BX = 0005h (virtual device ID for VTD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02646)
                  0000h:0000h if the VxD does not support an API
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02646)
Call VTD.386/VTD.VXD entry point with:
        AX = function number
            0000h get VTD version number
                Return: CF clear
                        AH = major version
                        AL = minor version
            0100h get current clock tick time
                Return: EDX:EAX = clock tick time in 840ns units since Windows
                                  was started
            0101h get current system time in milliseconds
                Return: EAX = time in milliseconds that Windows has been
                                  running
            0102h get current virtual machine time
                Return: EAX = cumulative amount of time the virtual machine has
                                  been active, in milliseconds
Note:   this entry point should only be called directly when TOOLHELP.DLL
          TimerCount() cannot be called
SeeAlso: #01268,#01270,#01269 at INT 20"Windows"
--------W-2F1684BX0006-----------------------
INT 2F P - MS Windows95 - V86MMGR - GET API ENTRY POINT
        AX = 1684h
        BX = 0006h (virtual device ID for V86MMGR device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02647)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02647)
Call V86MMGR entry point with:
        EAX = function number
            0000h get V86MMGR version
                Return: CF clear
                        AH = major version
                        AL = minor version
            0001h get ???
                Return: CF clear
                        EAX = status bits
                                bit 0: ???
                                bit 1: ???
                                bit 2: ???
                                bit 3: ???
                                bit 4: ???
            else
                Return: CF set
--------W-2F1684BX0009-----------------------
INT 2F P - MS Windows - REBOOT - GET API ENTRY POINT
        AX = 1684h
        BX = 0009h (virtual device ID for REBOOT device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02648)
                  0000h:0000h if the VxD does not support an API
SeeAlso: INT 14/AH=17h"FOSSIL",INT 16/AX=E0FFh

(Table 02648)
Call REBOOT protected-mode entry point with:
        AX = function
            0100h warm boot
                Return: never
                Note:   broadcasts "Reboot_Processor" message, which is caught
                          by the VKD device
            0201h set KERNEL Ctrl-Alt-Del handler
                ES:DI -> new Ctrl-Alt-Del handler
                DS:SI -> KERNEL reboot sanity check byte
                Return: CF clear
                Notes:  if an application installs its own handler and then
                          chains to Windows' handler, Windows will no longer
                          be able to detect hung applications, and will always
                          produce an "Application not responding" dialog
                        DS must contain a writable, fixed selector because
                          the provided address is converted to a linear address
                          before being stored
                        when Ctrl-Alt-Del is pressed in the system VM, Reboot
                          sets the sanity check byte to zero, schedules a
                          750ms wait, and then tests whether the check byte is
                          still zero; if not, it displays a message that there
                          is no hung application and then exits
            0202h get KERNEL Ctrl-Alt-Del handler
                Return: CF clear
                        ES:DI -> current Ctrl-Alt-Del handler
                Note:   the default handler is located in KERNEL
            0203h display "Application not responding" dialog box
                ES:DI -> ASCIZ name of hung application
                Return: never if user pressed Ctrl-Alt-Del a second time
                        CF clear
                        AX = result
                            0000h user pressed Esc
                            0001h user pressed Enter
                Note:   this function is used by the default Windows
                          Ctrl-Alt-Del handler
            0204h set/reset protected-mode INT 01 handler
                CX:EDX -> new protected-mode INT 01 handler
                CX = 0000h restore protected-mode INT 01 handler
                Return: CF clear
                Notes:  if CX is nonzero, the current handler address is saved
                          internally before the new handler is set; this saved
                          address is then used when CX is zero on entry
                        used by Windows' default Ctrl-Alt-Del handler; actual
                          fatal exit to DOS will be done on next INT 01
                Warning: opened files are not closed and remain open as
                          orphaned files in DOS
Note:   functions 0201h and 0203h are not useful outside the system VM
SeeAlso: #01271,#01273
--------W-2F1684BX000A-----------------------
INT 2F P - MS Windows - VDD - GET API ENTRY POINT
        AX = 1684h
        BX = 000Ah (virtual device ID for VDD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02649)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02649)
Call VDD entry point with:
        EAX = function
            0000h get VDD version
                Return: CF clear
                        AH = major version
                        AL = minor version
                Note:   also performs an internal initialization
            0001h ???
                Return: ECX = ???
                        ???
            0002h
            0003h
            0004h
            0005h
            0006h
            0007h
            0008h
            0009h
            0080h
            0081h
            0082h
            0083h
            0084h
            0085h
            0086h
            0087h
            0088h
            0089h
            else
                Return: nothing
--------W-2F1684BX000C-----------------------
INT 2F - MS Windows - VMD - GET API ENTRY POINT
        AX = 1684h
        BX = 000Ch (virtual device ID for VMD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02650)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02650)
Call VMOUSE entry point with:
        EAX = function number
            0000h get VMOUSE version
                Return: CF clear
                        AH = major version
                        AL = minor version
            0001h
                EBX = ???
                ECX = ???
                Return: CF clear if successful
                        CF set on error (e.g. fn 0003h not yet called)
            0002h ??? (calls "test system VM handle")
                Return: CF clear if successful (in system VM)
                        CF set on error
            0003h ???
                ECX = ???
                DX = ???
                Return: CF clear
            0004h ???
                Note: invokes Call_Priority_VM_Event
            0005h get mouse port data
                Return: CF clear
                        AL = ??? (04h)
                        AH = mouse IRQ interrupt number (IRQ4=0Ch,etc.)
                        CX = mouse I/O port address (e.g. 03F8h)
                        DX = COM port number??? (0001h for mouse on COM1)
            0100h NOP???
                Return: CF clear
            0101h init???
                Return: CF clear
                Note:   appears to be the same as fn 0005h, but returns no data
            0102h unimplemented
                Return: CF set
            0103h check ???
                Return: AX = status (0000h/0001h)
                Note:   checks flag set by fn 0003h
            else
                Return: CF set
SeeAlso: #02649,#02651
--------W-2F1684BX000D-----------------------
INT 2F P - MS Windows - VKD - GET API ENTRY POINT
        AX = 1684h
        BX = 000Dh (virtual device ID for VKD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02651)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02651)
Call VKD entry point with:
        EAX = function
            0000h get VKD version
                Return: CF clear
                        AH = major version
                        AL = minor version
            0001h ???
                EBX = VM handle or 00000000h to use ??? VM handle
                CH = ???
                CL = ???
                EDX = ??? or FFFFFFFFh
                Return: CF clear if successful
                        CF set on error
            else
                Return: CF set
SeeAlso: #02650,#02652
--------W-2F1684BX000E-----------------------
INT 2F P - MS Windows - VCD - GET API ENTRY POINT
        AX = 1684h
        BX = 000Eh (virtual device ID for VCD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02652)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02652)
Call VCD entry point with:
        EDX = function number
            0000h get VCD version
                Return: CF clear
                        AH = major version
                        AL = minor version
            0001h get ???
                Return: CF clear
                        AX = bit mask of ???
            0002h get ???
                CX = COM port number
                Return: CF clear
                        DX:AX -> ???
            0003h set ???
                CX = COM port number
                DX:AX -> new ???
                Return: CF clear
            0004h acquire COM port
                AX = ???
                CX = COM port number
                Return: CF clear
                        AX = ???
                        EBX = ???
                        DX = ???
            0005h release COM port
                CX = COM port number
                Return: CF clear
            0006h ???
                Return: CF set
                        AL = 00h
            else
                Return: CF set
                        EAX = FFFFFFFFh
Note:   these functions are apparently only available from the system VM,
          returning CF set and EAX=FFFFFFFFh otherwise
SeeAlso: #02651,#02653
--------W-2F1684BX000F-----------------------
INT 2F P - MS Windows - VPD - GET API ENTRY POINT
        AX = 1684h
        BX = 000Fh (virtual device ID for VPD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02653)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02653)
Call VPD entry point with:
        EDX = function number
            0000h get VPD version
                Return: CF clear
                        AH = major version
                        AL = minor version
                        DX = ??? (CB01h)
            0001h get valid??? printers
                Return: CF clear
                        AX = bitmask of ??? printers (bits 0-2)
            0002h get ??? for printer
                CX = printer port (0-2)
                Return: CF clear if successful
                            BX:AX = ???
                        CF set on error (invalid port number)
            0003h set ??? for printer
                CX = printer port (0-2)
                BX:AX = ???
                Return: CF clear if successful
                        CF set on error (invalid port number)
            0004h ???
                CX = printer port (0-2)
                EAX = VM handle
                Return: CF clear if successful
                        CF set on error (invalid port number)
            0005h ???
                CX = printer port (0-2)
                EAX = VM handle
                Return: CF clear if successful
                        CF set on error (invalid port number or ???)
            0006h-000Eh unused
                Return: CF set
            000Fh ???
                CX = printer port (0-2)
                AX = ???
                Return: CF clear if successful
                        CF set on error (e.g. invalid port number)
            0010h ???
                CX = printer port (0-2)
                Return: CF clear if successful
                        CF set on error (e.g. invalid port number)
            0011h ???
                CX = printer port (0-2)
                Return: CF clear if successful
                        CF set on error (e.g. invalid port number)
            0012h get port status
                CX = printer port (0-2)
                Return: CF clear if successful
                            AX = port status (see #P0658 at PORT 03BCh"LPT")
                        CF set on error (e.g. invalid port number)
            else
                Return: CF set
Note:   these functions are apparently only available from the system VM,
          returning CF set
SeeAlso: #02652,#02654
--------W-2F1684BX0010-----------------------
INT 2F - MS Windows - IOS - GET API ENTRY POINT
        AX = 1684h
        BX = 0010h (virtual device ID for IOS device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02654)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02654)
Call IOS entry point with:
        EAX = function number
            0000h ???
                Return: CF clear if successful
                            AX = 0000h
                        CF set on error
                            AX = FFFFh
            0001h check if ???
                Return: CF clear if successful
                            AX = 0000h
                        CF set on error
                            AX = FFFFh
            0002h requestor services???
                DL = service number???
                Return: CF clear if successful
                            AX = 0000h
                            DX = ???
                        CF set on error
                            AX = FFFFh
                Note:   calls "IOS_Requestor_Service" (see INT 20"Windows")
            0003h ??? (copies five bytes of data internally)
                Return: CF clear if successful
                            AX = 0000h
                            EDX = ???
                        CF set on error
                            AX = FFFFh
            else
                Return: CF set
                        AX = FFFFh
SeeAlso: #02653,#02655
--------W-2F1684BX0011-----------------------
INT 2F - MS Windows - VMCPD - GET API ENTRY POINT
        AX = 1684h
        BX = 0011h (virtual device ID for VMCPD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02655)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02655)
Call Windows95 VMCPD protected-mode entry point with:
        EAX = function number
            0000h get VMCPD version
                Return: CF clear
                        AH = major version
                        AL = minor version
            0001h get ??? flags
                Return: CF clear
                        AX = ??? flags
                            bit 0: ???
                            bit 1: ???
                            bit 2: ???
                            bit 3: ???
            else
                Return: CF set
SeeAlso: #02654,#02656
--------W-2F1684BX0015-----------------------
INT 2F - MS Windows - DOSMGR - GET API ENTRY POINT
        AX = 1684h
        BX = 0015h (virtual device ID for DOSMGR device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02656,#01282)
                  0000h:0000h if the VxD does not support an API
SeeAlso: #01282 at INT 20"Windows"

(Table 02656)
Call DOSMGR entry point with:
        AX = 0000h get DOSMGR version
            Return: CF clear
                    AX = version (AH = major, AL = minor)
        AX = 0001h set critical focus
            Return: CF clear
        AX = 0002h crash current virtual machine
            Return: never
            Note:   displays message box stating that "application has been
                      stopped by the DOSMGR device"
        AX = 0003h enter critical section
            Note:   this function assumes that the code for INT 2A/AX=8001h
                      and INT 2A/AX=8002h have been modified for Windows
        AX = 0004h get VM ID byte
            Return: CF clear if successful
                        ES:DI -> VM ID byte
                    CF set on error
            Note:   this function fails if the INT 2A modifications have not
                      yet been applied
        AX = 0005h inform Windows of possible media change
            BL = drive number (00h=A:)
            Return: CF clear if successful
                    CF set on error
SeeAlso: #01282 at INT 20"Windows",#02655,#02657
--------W-2F1684BX0017-----------------------
INT 2F U - MS Windows - SHELL - GET API ENTRY POINT
        AX = 1684h
        BX = 0017h (virtual device ID for SHELL device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02657)
                  0000h:0000h if the VxD does not support an API
SeeAlso: AX=1684h/BX=0021h,#01283 at INT 20"Windows"

(Table 02657)
Call SHELL entry point with:
        EDX = function number (0000h-0027h,0100h-0108h, mostly unknown)
            0000h get version number
                Return: AX = version number
                        EBX = system VM handle
            0001h "SHELL_Get_SYSVM_Info" get system VM information
                Return: CF clear
                        AX bit 0 set if system VM executing exclusively
                        BX = background time slice priority
                        CX = foreground time slice priority
                        SI = minimum time slice in milliseconds
            0002h "SHELL_Set_SYSVM_Info" set system VM information
                AX bit 0 set if system VM should execute exclusively (ignored?)
                BX = background time slice priority (1-10000)
                CX = foreground time slice priority (1-10000)
                SI = minimum time slice in milliseconds (1-10000)
                Return: CF clear if successful
            0003h "SHELL_Crt_VM" create a virtual machine
                ES:EDI -> SEB structure (see #02658)
                Return: CF clear if successful
                           EAX = VM handle
                        CF set on error
                           EDX,EAX = result from GetSetDetailedVMError()
            0004h "SHELL_Destroy_VM" destroy a virtual machine
                EBX = VM handle (not system VM)
                Return: nothing
            0005h "SHELL_Set_Focus"
                EBX = VM handle
                ECX = ???
                Return: nothing
            0006h "SHELL_Get_VM_State"
                EBX = VM handle (not system VM)
                ES:EDI -> ??? structure
                Return: CF clear if successful
            0007h "SHELL_Set_VM_State"
                EBX = VM handle (not system VM)
                ES:EDI -> ??? structure
            0008h "SHELL_Debug_Out"
                ???
                Return: ???
                Note:   dummy function in retail version of MS Windows
            0009h "SHELL_VMDA_Init"
                ???
                Return: ???
            000Ah "SHELL_VMDA_Exit"
                ???
                Return: ???
            000Bh "SHELL_Get_Message_Txt"
                ???
                Return: ???
            000Ch "SHELL_Event_Complete"
                ???
                Return: ???
            000Dh "SHELL_Get_Contention_Info"
                ???
                Return: ???
            000Eh "SHELL_Get_Clip_Info"
                ???
                Return: ???
            000Fh "SHELL_Set_Paste"
                ???
                Return: ???
            0010h "SHELL_Switcher_Assist"
                ???
                Return: ???
            0011h "SHELL_Get_FileSysChng"
                ???
                Return: ???
            0012h "SHELL_Query_Destroy"
                ???
                Return: ???
            0013h "SHELL_SetFocus_Cur_VM" set input focus to current VM
                ???
                Return: ???
            0014h "SHELL_User_Busy_API"
                ???
                Return: ???
            0015h "SHELL_Chng_Hot_Key"
                ???
                Return: ???
            0016h "SHELL_Get_TermInfo"
                ???
                Return: ???
            ---Windows95---
            0017h ???
            0018h ???
            0019h ???
            001Ah ???
            001Bh ???
            001Ch ???
            001Dh ???
            001Eh ???
            001Fh ???
            0020h ???
            0021h ???
            0022h ???
            0023h ???
            0024h ???
            0025h ???
            0026h ???
                Note:   makes VxDCALL 00178002h (see INT 20"Windows")
            0027h ???
            0100h get ??? version
                Return: AX = version??? (0400h for Windows95)
            0101h not implemented
                Return: CF set
                        EAX = FFFFFFFFh
            0102h not implemented
                Return: CF set
                        EAX = FFFFFFFFh
            0103h not implemented
                Return: CF set
                        EAX = FFFFFFFFh
            0104h ???
            0105h ???
            0106h ???
                ???
                Return: CF clear if successful
                        CF set on error
            0107h get SDK version for VxD
                AX = VxD identifier
                Return: EAX = VxD ID (high word) and SDK version (low)
                            00000000h if no such VxD loaded
                Note:   makes a VMMCALL 0001013Fh (see INT 20"Windows")
                          followed by ???
            0108h ???
Return: CF set if called from VM other than system VM
            EAX = FFFFFFFFh
Note:   except for functions 0013h,0026h,and 010xh, this API may only be
          called from the system VM
SeeAlso: #01283 at INT 20"Windows"

Format of Shell Execution Block (SEB):
Offset  Size    Description     (Table 02658)
 00h    DWORD   PIF flags (see #02659)
 04h    DWORD   display flags (see #02660)
 08h    PWORD   -> pathname of .EXE to run
 0Eh    PWORD   -> argument list
 14h    PWORD   -> working drive/directory
 1Ah    WORD    desired number of V86 pages for virtual machine
 1Ch    WORD    minimum number of V86 pages for VM
 1Eh    WORD    foreground priority
 20h    WORD    background priority
 22h    WORD    maximum KB of EMS
 24h    WORD    minimum KB of EMS
 26h    WORD    maximum KB of XMS
 28h    WORD    minimum KB of XMS
 2Ah    WORD    maximum KB of DPMI???
 2Ch    WORD    minimum KB of DPMI???
 2Eh 128 BYTEs  title
Note:   the PWORDs at offsets 08h,0Eh, and 14h consist of a DWORD offset
          followed by a WORD selector

Bitfields for 386 Enhanced Mode PIF flags:
Bit(s)  Description     (Table 02659)
 0      exclusive use of processor when VM is fullscreen
 1      VM runs in background
 2      VM runs in window
 3-4    ???
 5      Alt-Tab reserved
 6      Alt-Esc reserved
 7      Alt-Space reserved
 8      Alt-Enter reserved
 9      Alt-PrtSc reserved
 10     PrtSc reserved
 11     Ctrl-Esc reserved
 12     VM will release idle time slice
 13     VM not allowed to use high memory
 14     ???
 15     VM expanded memory not pageable
 16     VM extended memory not pageable
 17     Fast paste from clipboard enabled
 18     VM application memory not pageable
 30     Close VM when application exits
SeeAlso: #02658,#02660

Bitfields for SHELL display options:
Bit(s)  Description     (Table 02660)
 0      emulate text mode
 1      monitor text port
 2      monitor low graphics port
 3      monitor high graphics port
 7      Retain video memory
SeeAlso: #02658,#02659
--------W-2F1684BX001A-----------------------
INT 2F - MS Windows - VNETWARE - GET API ENTRY POINT
        AX = 1684h
        BX = 001Ah (virtual device ID for VNETWARE device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX001D-----------------------
INT 2F P - MS Windows - WINDEBUG - GET API ENTRY POINT
        AX = 1684h
        BX = 001Dh (virtual device ID for WINDEBUG device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX0021-----------------------
INT 2F PU - MS Windows - PAGEFILE - GET API ENTRY POINT
        AX = 1684h
        BX = 0021h (virtual device ID for PAGEFILE device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02661)
                  0000h:0000h if the VxD does not support an API
SeeAlso: AX=1684h/BX=0017h,#01289 at INT 20"Windows"

(Table 02661)
Call PAGEFILE entry point with:
        AX = function
            0000h get version
                Return: CF clear
                        AX = version (AH = major, AL = minor)
            0001h get swap file info
                DS:SI -> 128-byte buffer for swap file full pathname
                DS:DI -> 128-byte buffer for SPART.PAR full pathname
                Return: CF clear
                        AL = pager type (see #02662)
                        AH = flags
                            bit 7: swap file corrupted
                        ECX = maximum size of swap file
                        DS:SI buffer filled if paging enabled
                        DS:DI buffer filled if permanent swap file
            0002h delete permanent swap file on exit
                Return: CF clear
            0003h get current temporary swap file size
                Return: CF clear
                        DX:AX = current swap file size in bytes
                                0000h:0000h if permanent swap file
Note:   this API is only available in protected mode, and may only be called
          from the system VM
SeeAlso: #01289 at INT 20"Windows",#02663

(Table 02662)
Values for MS Windows PAGEFILE pager type:
 00h    paging disabled
 01h    MSDOS
 02h    BIOS
 03h    32-bit disk access
SeeAlso: #02661
--------W-2F1684BX0022-----------------------
INT 2F P - MS Windows - APIX - GET API ENTRY POINT
        AX = 1684h
        BX = 0022h (virtual device ID for APIX device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02663)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02663)
Call APIX protected-mode entry point with:
        AH = function number
            00h get APIX version
                Return: CF clear
                        AH = major version
                        AL = minor version
            01h ???
                Return: CF clear
                        AX = number of ???
            02h NOP
                Return: CF clear
            03h ???
                Return: CF clear
                        AX = 0000h/FFFFh
            else
                Return: CF clear (bug?)
SeeAlso: #02661,#02666
--------W-2F1684BX0026-----------------------
INT 2F P - MS Windows - VPOWERD - GET API ENTRY POINT
        AX = 1684h
        BX = 0026h (virtual device ID for VPOWERD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02664)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02664)
Call VPOWERD.VXD entry point with:
        AX = function number
            0000h get VPOWERD version
                Return: DX = 0000h
                        AX = version (AH = major, AL = minor)
            0001h get APM BIOS version
                Return: DX:AX = APM BIOS version
            0002h get current power management level
                Return: DX:AX = power management level
            0003h enable/disable power management (see INT 15/AX=5308h)
                ??? = new state of power management
                Return: DX:AX = 0000h:0000h if successful
                           else error code (see #02665)
            0004h set power state (see INT 15/AX=5307h)
                Return: DX:AX = 0000h:0000h if successful
                           else error code (see #02665)
            0005h set system power status
                Return: DX:AX = 0000h:0000h if successful
                           else error code (see #02665)
            0006h restore APM power-on defaults (see INT 15/AX=5309h)
                Return: DX:AX = 0000h:0000h if successful
                           else error code (see #02665)
            0007h get power status (see INT 15/AX=530Ah)
                Return: ???
            0008h get APM 1.1 power state (see INT 15/AX=530Ch)
                Return: ???
            0009h invoke OEM APM function
                ??? -> buffer containing parameters for INT 15/AX=5380h
                Return: DX:AX = 0000h:0000h or error code (see #02665)
                        buffer updated if successful
            000Ah register power handler
                ???
                Return: DX:AX = 0000h:0000h or error code
            000Bh deregister power handler
                ???
                Return: DX:AX = 0000h:0000h or error code (see #02665)
            000Ch Win32 get system power status
            000Dh Win32 set system power status
            else
                Return: DX = 0000h
                        AX = 00FFh
SeeAlso: #02663,#02666

(Table 02665)
Values for VPOWERD.VXD error code:
 000000xxh      APM error code
 000000FFh      function number out of range
 80000001h      ??? (service 05h)
 80000002h      ??? (service 0Dh)
 80000003h      specified NULL buffer pointer (service 07h,08h,09h)
 80000005h      ??? (service 03h)
 80000006h      ??? (service 04h)
 80000007h      ??? (service 05h)
 80000008h      ??? (service 05h)
 80000009h      out of memory (service 0Ah)
 8000000Ah      ??? (service 0Ah)
 8000000Bh      invalid power handler (service 0Bh)
 8000000Ch      unsupported/disabled??? function
SeeAlso: #02664,#01290
--------W-2F1684BX0027-----------------------
INT 2F - MS Windows95 - VXDLDR - GET API ENTRY POINT
        AX = 1684h
        BX = 0027h (virtual device ID for VXDLDR device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02666)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02666)
Call VXDLDR entry point with:
        EAX = function number
            0000h get VXDLDR version
                Return: CF clear
                        AX = 0000h (successful)
                        DH = major version
                        DL = minor version
            0001h load device
                BX = ASCIZ 8.3 filename of dynamically-loadable VxD (must
                      reside in Windows system directory)
                Return: CF clear if successful
                            AX = 0000h
                            ES:DI -> VxD API entry point
                        CF set on error
                            AX = error code (see #02667)
            0002h unload device
                BX = ASCIZ 8.3 filename of dynamically-loadable VxD (must
                      reside in Windows system directory)
                Return: CF clear if successful
                            AX = 0000h
                        CF set on error
                            AX = error code (see #02667)
            else
                Return: CF set
                        AX = 000Bh
SeeAlso: #02664,#02668

(Table 02667)
Values for VXDLDR error code:
 0000h  successful
 000Bh  invalid function number
SeeAlso: #02666
--------W-2F1684BX0028-----------------------
INT 2F - MS Windows - NDIS - GET API ENTRY POINT
        AX = 1684h
        BX = 0028h (virtual device ID for NDIS device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02668)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02668)
Call NDIS.VXD entry point with:
        ??? = function number
            0000h set ??? to ???
                ??? = new ???
                Return: DX:AX = 0000h:0001h
            0002h ???
                ???
                Return: DX:AX -> ???
            0003h reset ??? to default
                Return: DX:AX = 0000h:0001h
            else
                Return: DX:AX = 0000h:0000h
SeeAlso: #02666,#02669
--------W-2F1684BX002A-----------------------
INT 2F P - MS Windows - VWIN32 - GET API ENTRY POINT
        AX = 1684h
        BX = 002Ah (virtual device ID for VWIN32 device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02669)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02669)
Call VWIN32.VXD entry point with:
        AH = function number
            00h get VWIN32 version and ???
                Return: CF clear
                        AH = major version
                        AL = minor version
                        EDX = ???
            01h ???
                EBX = ???
                ECX = ???
                Return: CF clear
                        EAX = ???
            02h ???
                Return: CF clear
                        AX = ??? or 0000h
            03h address allocation
                DS:??? -> buffer containing/for page data
                ECX = length of buffer
                AL = subfunction
                    00h reserve page(s)
                    01h commit page(s)
                    02h decommit page(s)
                    03h free page(s)
                Return: CF clear if successful
                        CF set on error
                Note:   this function uses ECX bytes of stack
            04h get ???
                Return: CF clear
                        EAX = ???
            05h ???
                EBX = ???
                Return: CF clear
                        EAX = ???
            06h ???
                EBX = ???
                Return: CF clear
                        EAX = ???
            07h ???
                EBX = ???
                Return: CF clear
                        EAX = ???
            08h get ???
                Return: CF clear
                        AX = ???
            09h ???
                EBX = ???
                ECX = ???
                Return: CF clear
            0Ah ???
                EBX = ???
                Return: CF clear
            0Bh ???
                EBX = ???
                Return: CF clear
            0Ch ???
                EBX = ???
                ECX = ???
                EDX = ???
                ???
                Return: CF clear if successful
                            EAX = ???
                        CF set on error
            0Dh clear ???
                Return: CF clear
            0Eh ???
                EBX = ???
                ECX = ???
                Return: CF clear
            0Fh ???
                EBX = ???
                ECX = ???
                Return: CF clear
            10h ???
                Return: CF clear
                Note:   invokes VMMcall 00010184h
            11h ???
                Return: CF clear
                Note:   invokes VMMcall 00010160h
            12h ???
                ???
            13h pop up system error dialogue
                Return: CF clear
                        AX = ??? or 0000h
            14h "IFSMgr_GetConversionTablePtrs"
                Return: CF clear
                        DX:AX -> ???
                Note:   invokes VxDcall 00400051h
            15h "Boost_With_Decay"
                EBX = ???
                ECX = ???
                EDX = ???
                Return: CF clear
            else
                Return: CF set
SeeAlso: #02668,#02670
--------W-2F1684BX002B-----------------------
INT 2F - MS Windows - VCOMM - GET API ENTRY POINT
        AX = 1684h
        BX = 002Bh (virtual device ID for VCOMM device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02670)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02670)
Call VCOMM.VXD entry point with:
        AX = function number
            0000h open COM/LPT port
                BX = port number (00h-7Fh = COMx, 80h-FFh = LPTx)
                Return: DX:AX = handle???
            0001h set comm state
                ???
                Return: AX = ???
            0002h setup comm port
                ???
                Return: AX = status (0000h failed, FFFFh success)
            0003h transmit character
                EBX = handle???
                CL = character to transmit
                Return: AX = status???
            0004h close comm port
                EBX = handle???
                Return: ???
            0005h clear comm error
                EBX = handle???
                EAX = ???
                Return: AX = status???
            0006h "EscapeCommFunction"
                EBX = handle???
                CX = ???
                EAX = ???
                Return: DX:AX = ???
            0007h purge buffers
                EBX = handle???
                CX = ???
                Return: AX = status???
            0008h set comm event mask
                EBX = handle???
                CX = new event mask
                Return: AX = status???
            0009h get comm event mask
                EBX = handle???
                Return: AX = current event mask
            000Ah ???
                EBX = handle???
                Return: ???
            000Bh "WriteComm"
                EBX = handle???
                CX = number of characters to write
                ES???:BX -> buffer (if CX > 1)
                SI??? low byte contains character if CX=1
                Return: AX = status
                        EAX high word may be destroyed
            000Ch "ReadComm"
                EBX = handle???
                CX = number of bytes to read
                ES???:DI -> buffer
                Return: AX = status ???
                        ZF = ???
            000Dh set ??? callback
                EBX = handle???
                CX = ???
                DX = ???
                Return: AX = status???
            else
                Return: AX = 0000h
SeeAlso: #02669,#02671
--------W-2F1684BX002D-----------------------
INT 2F P - MS Windows - W32S - GET API ENTRY POINT
        AX = 1684h
        BX = 002Dh (virtual device ID for W32S device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX0030-----------------------
INT 2F P - MS Windows - MACH32 - GET API ENTRY POINT
        AX = 1684h
        BX = 0030h (virtual device ID for MACH32 device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX0032-----------------------
INT 2F - MS Windows - SERVER / VSERVER - GET API ENTRY POINT
        AX = 1684h
        BX = 0032h (virtual device ID for SERVER device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02671)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",#01296 at INT 20"Windows"

(Table 02671)
Call Windows95 VSERVER.VXD protected-mode entry point with:
        AX = function number
            0003h NOP
                Return: AX = 0000h
            0004h NOP
                Return: AX = 0000h
            0007h NOP
                Return: AX = 0000h
            0008h NOP
                Return: nothing
            000Fh ???
                Return: AX = status
                            0000h successful
                            0842h on error
            0010h ???
                Return: AX = status
                            0000h successful
                            0842h on error
            else
                Return: AX = 0032h
SeeAlso: #02670,#02672
--------W-2F1684BX0033-----------------------
INT 2F - MS Windows - CONFIGMG - GET API ENTRY POINT
        AX = 1684h
        BX = 0033h (virtual device ID for CONFIGMG device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02672)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02672)
Call CONFIGMG.VXD entry point with:
        AX = function number
            0000h get CONFIGMG version
                Return: CF clear
                        AH = major version
                        AL = minor version
            ...
            005Ah
            else
                Return: CF set
                        AX = 0020h
SeeAlso: #01297 at INT 20"Windows",#02671,#02673
--------x-2F1684BX0034-----------------------
INT 2F - Intel Plug-and-Play - CONFIGURATION MANAGER - GET ENTRY POINT
        AX = 1684h
        BX = 0034h (ID for Configuration Manager) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> API entry point (see #02673)
                  0000h:0000h if Configuration Manager not loaded
Note:   this API is often provided by a DOS device driver, in which case it
          is available whether or not MSWindows is running
Index:  installation check;Plug-and-Play Configuration Manager
SeeAlso: AX=1684h/BX=304Ch

(Table 02673)
Call Configuration Manager entry point with:
        AX = function
            0000h "CM_GetVersion" get supported DDI version
                Return: AH = BCD major version
                        AL = BCD minor version
                        BX = number of devices identified by configuration
                Note:   returns AX = 0000h if no config manager installed
            0001h "CM_GetConfig" get device configuration
                BX = device index
                ES:DI -> buffer for configuration information (see #02675)
                Return: AX = status
                            0000h successful
                                ES:DI buffer filled
                            other error code (0001h = index out of range)
            0002h "CM_LockConfig" lock device configuration
                ES:DI -> configuration information (see #02675)
                Return: AX = status
                            0000h successful
                                ES:DI buffer filled with assigned config
                            0001h resources conflict
                            0002h invalid request or configuration info
            0003h "CM_UnlockConfig" unlock device configuration
                ES:DI -> configuration information (see #02675)
                Return: AX = status
                            0000h successful
                                ES:DI buffer filled with assigned config
                            0001h invalid request or configuration info
            0004h "CME_QueryResources" get hot-swappable resources
                ES:DI -> configuration information (see #02675)
                Return: AX = status (see #02674)
            0005h "CME_AllocResources" remove resources from available pool
                ES:DI -> configuration information (see #02675)
                Return: AX = status (see #02674)
            0006h "CME_DeallocResources" return resources to available pool
                ES:DI -> configuration information (see #02675)
                Return: AX = status (see #02674)
SeeAlso: #01298 at INT 20"Windows",#02672,#02676

(Table 02674)
Values for Configuration Manager status:
 00h    successful
 01h    device not found, configuration error
 02h    I/O port unavailable
 04h    IRQ unavailable
 08h    DMA channel unavailable
 10h    memory range unavailable
SeeAlso: #02673

Format of Configuration Information Structure:
Offset  Size    Description     (Table 02675)
 00h    DWORD   bus ID
 04h    DWORD   device ID
 08h    DWORD   serial number
 0Ch    DWORD   logical ID
 10h    DWORD   flags
---ISA bus---
 14h    BYTE    Card Select Number
 15h    BYTE    logical device number
 16h    WORD    Read Data port
------
 18h    WORD    number of memory windows
 1Ah  9 DWORDs  physical base addresses of memory windows
 3Eh  9 DWORDs  length of memory windows
 62h  9 WORDs   memory window attributes
 74h    WORD    number of I/O ports
 76h 20 WORDs   I/O port base addresses
 B6h 20 WORDs   lengths of I/O port ranges
 F6h    WORD    number of IRQs
 F8h  7 BYTEs   IRQ registers
 FFh  7 BYTEs   IRQ attributes
106h    WORD    number of DMA channels
108h  7 BYTEs   DMA channels used
10Fh  7 WORDs   DMA channel attributes
11Dh  3 BYTEs   reserved
SeeAlso: #02673
--------W-2F1684BX0036-----------------------
INT 2F - MS Windows - VFBACKUP - GET API ENTRY POINT
        AX = 1684h
        BX = 0036h (virtual device ID for VFBACKUP device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02676)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02676)
Call VFBACKUP.VXD entry point with:
        nothing -- this API is a NOP for the default Windows95 VFBACKUP
SeeAlso: #02673,#01126
--------W-2F1684BX0037-----------------------
INT 2F - MS Windows - ENABLE.VXD - GET API ENTRY POINT
        AX = 1684h
        BX = 0037h (virtual device ID for ENABLE device) (see #02677)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02676)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02677)
Call Windows95 ENABLE.VXD entry point with:
        AX = function number
            0000h get ENABLE version
                Return: CF clear
                        AX = version (AH = major, AL = minor)
            0001h
                EBX = ???
                Return: ???
            0002h get ???
                Return: CF clear
                        DX:AX = ???
            0003h get ???
                Return: CF clear
                        DX:AX = ???
            0004h ???
                EBX = ???
                ECX = ???
                EDX = ???
                Return: CF clear if successful
                        CF set on error
            else
                Return: CF set
SeeAlso: #02676,#02678
--------W-2F1684BX0038-----------------------
INT 2F - MS Windows - VCOND - GET API ENTRY POINT
        AX = 1684h
        BX = 0038h (virtual device ID for VCOND device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02678)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02678)
Call VCOND.VXD virtual-86 entry point with:
        AX = function number
            0202h
            0203h
            0204h
            0205h
            0206h
            0207h
            0208h
            0209h
            020Ah
            020Bh
            020Dh
            020Eh
            020Fh
            0210h
            0401h
            0402h
            0403h
            0404h
            0405h
            else
                NOP
SeeAlso: #02679,#02677

(Table 02679)
Call VCOND.VXD protected-mode entry point with:
        AX = function number
            0301h
            0302h
            0303h
            0304h
            0305h
            0306h
            0307h
            0308h
            else
                NOP
SeeAlso: #02678,#02676
--------W-2F1684BX003B-----------------------
INT 2F - MS Windows - DSVXD - GET API ENTRY POINT
        AX = 1684h
        BX = 003Bh (virtual device ID for DSVXD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX003D-----------------------
INT 2F - MS Windows - BIOS VxD - GET API ENTRY POINT
        AX = 1684h
        BX = 003Dh (virtual device ID for BIOS device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02680)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02680)
Call BIOS.VXD entry point with:
        AX = function number
            0000h get BIOS.VXD version
                Return: CF clear
                        AH = major version
                        AL = minor version
            0100h ???
                Return: AX = 0000h
                Note:   calls CONFIGMG services 804Eh/804Fh
            0200h ???
                Return: CF clear if successful
                            AX = ???
                        CF set on error
                            AX = error code???
                Note:   invokes VxDcall 00290002h
            0300h ???
                Return: CF clear if successful
                            AX = ???
                        CF set on error
                            AX = error code???
            else
                Return: CF set
SeeAlso: #02679,#02681
--------W-2F1684BX003E-----------------------
INT 2F - MS Windows - WSOCK - GET API ENTRY POINT
        AX = 1684h
        BX = 003Eh (virtual device ID for WSOCK device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX011F-----------------------
INT 2F P - MS Windows - VFLATD - GET API ENTRY POINT
        AX = 1684h
        BX = 011Fh (virtual device ID for VFLATD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02681)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",AX=1684/BX=045Dh,INT 20"Windows"

(Table 02681)
Call VFLATD.VXD entry point with:
        DL = function number
            00h get VFLATD version and ???
                Return: CF clear
                        EAX = version (AH = major, AL = minor)
                        EBX = ???
                        ECX = ???
                        EDX = ??? or 00000000h
            01h ???
                AX = ???
                CX = ???
                Return: EAX = ???
                        EDX = ???
            02h ???
                ???
            03h ???
                EAX = ???
                EBX = ???
                ESI = ???
                CX = ???
                DH = ???
                Return: EAX = ???
                        EDX = ???
                        CF clear
            04h ???
                DH = ???
                EAX = ???
                ECX = ???
                Return: CF clear
                        EAX = ???
                        EDX = ???
            05h ???
                ???
                Note:   locks some linear memory and calls fn 02h
            06h ???
                ???
                Return: CF clear if successful
                        CF set on error
                Note:   calls fn 02h and unlocks some linear memory
            else
                Return: CF set
SeeAlso: #02680
--------W-2F1684BX0200-----------------------
INT 2F - MS Windows - VIPX - GET API ENTRY POINT
        AX = 1684h
        BX = 0200h (virtual device ID for VIPX device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX0202-----------------------
INT 2F - MS Windows - WINICE - GET API ENTRY POINT
        AX = 1684h
        BX = 0202h (virtual device ID for WINICE device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX0203-----------------------
INT 2F P - MS Windows - VCLIENT - GET API ENTRY POINT
        AX = 1684h
        BX = 0203h (virtual device ID for VCLIENT device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX0205-----------------------
INT 2F - MS Windows - BCW - GET API ENTRY POINT
        AX = 1684h
        BX = 0205h (virtual device ID for BCW device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX0207-----------------------
INT 2F R - MS Windows - DPMS VxD - GET API ENTRY POINT
        AX = 1684h
        BX = 0207h (virtual device ID for DPMS device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX0234-----------------------
INT 2F - MS Windows - VCOMMUTE - GET API ENTRY POINT
        AX = 1684h
        BX = 0234h (virtual device ID for VCOMMUTE device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX0442-----------------------
INT 2F P - MS Windows - VTDAPI - GET API ENTRY POINT
        AX = 1684h
        BX = 0442h (virtual device ID for VTDAPI device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02682)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02682)
Call VTDAPI.VXD entry point with:
        EAX = function number
            0000h
            0001h
            0002h
            0003h
            0004h
            0005h
            0006h
            0007h
            0008h
            0009h
            000Ah
            000Bh
            else
                Return: nothing???
SeeAlso: #02682
--------W-2F1684BX0444-----------------------
INT 2F - MS Windows - VADMAD - GET API ENTRY POINT
        AX = 1684h
        BX = 0444h (virtual device ID for VADMAD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02683)
                  0000h:0000h if the VxD does not support an API

(Table 02683)
Call VADMAD entry point with:
        DX = operation
            0000h set VADMAD mode
                AX = desired mode
            0001h set VADMAD channel
                AX = desired channel
Note:   after setting mode/channel, start the DMA operation with an OUT to
          I/O port 0Bh (channels 0-3) or D6h (channels 4-7)
SeeAlso: #01268 at INT 20"Windows"
--------W-2F1684BX0445-----------------------
INT 2F - MS Windows - VSBD - GET API ENTRY POINT
        AX = 1684h
        BX = 0445h (virtual device ID for VSBD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX0446-----------------------
INT 2F - MS Windows - VADLIBD - GET API ENTRY POINT
        AX = 1684h
        BX = 0446h (virtual device ID for VADLIBD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX0449-----------------------
INT 2F P - MS Windows - vjoyd - GET API ENTRY POINT
        AX = 1684h
        BX = 0449h (virtual device ID for "vjoyd" device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02684)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02684)
Call VJOYD.VXD entry point with:
        AX = function number
            0000h get VJOYD version
                Return: AH = major version
                        AL = minor version
            0001h ???
                DX = ???
                Return: DX:AX = ???
            0002h ???
                DX = ???
                Return: DX:AX = ???
            0003h ???
                Retrun: AX = 0001h
            0004h ???
                DX = ???
                Return: DX:AX = ???
            0005h ???
                Return: ???
            else
                Return: EAX = 00000000h
SeeAlso: #02682,#02685
--------W-2F1684BX044A-----------------------
INT 2F - MS Windows - mmdevldr - GET API ENTRY POINT
        AX = 1684h
        BX = 044Ah (virtual device ID for "mmdevldr" device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02685)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02685)
Call MMDEVLDR.VXD entry point with:
        DX = function number
            0000h ???
                Return: CF clear if successful
                            AX = 0000h
                        CF set on error
                            AX = error code (000Bh)
                Note:   invokes VxDCall 17000Eh ("CallAtAppyTime")
            0001h ???
                Return: CF clear if successful
                            AX = 0000h
                        CF set on error
                            AX = error code (000Bh)
                Note:   invokes VxDCall 17000Eh ("CallAtAppyTime")
            0002h ???
                EDX = ???
                Return: CF clear if successful
                            AX = 0000h
                            EDX = ???
                        CF set on error
                            AX = error code
            0003h ???
                Return: CF clear if successful
                            AX = 0000h
                        CF set on error
                            AX = error code
                Note:   invokes VxDcall 2A0002h ("VWIN32_QueueUserApc")
            0004h set Win32 event
                Return: CF clear if successful
                            AX = 0000h
                        CF set on error
                            AX = error code
                Note:   invokes VxDcall 2A000Eh ("VWIN32_SetWin32Event")
            0005h ??? (allocates some memory)
                Return: CF clear
                        AX = 0000h
            0006h ??? (frees memory)
                Return: CF clear if successful
                            AX = 0000h
                        CF set on error
                            AX = error code
            else
                Return: CF set
                        AX = 000Bh (invalid function)
SeeAlso: #02684,#02686
--------W-2F1684BX045D-----------------------
INT 2F P - MS Windows - VflatD - GET API ENTRY POINT
        AX = 1684h
        BX = 045Dh (virtual device ID for VflatD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",AX=1684h/BX=011Fh,INT 20"Windows"
--------W-2F1684BX045F-----------------------
INT 2F - MS Windows - azt16 - GET API ENTRY POINT
        AX = 1684h
        BX = 045Fh (virtual device ID for "azt16" device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02686)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h/BX=3110h,AX=1684h"DEVICE API",INT 20"Windows"

(Table 02686)
Call azt16.VXD entry point with:
        DX = function number
            0000h get azt16 version
                Return: CF clear
                        AX = version (AH=major, AL=minor)
            0001h ???
                AX = subfunction
                    0000h ???
                        Return:
                    0001h ???
                        ECX = ???
                    else error
                Return: CF clear if successful
                            ???
                        CF set on error
                            AX = error code
            0002h ???
                AX = ???
                BX = ???
                Return: ???
            0003h ???
                AX = ???
                BX = ???
                Return: ???
            0004h ???
                BX = ???
                CX = ???
                Return: CF clear if successful
                             AX = 0001h
                        CF set on error
                             AX = 0000h
            0005h ???
                BX = ???
                CX = ???
                Return: CF clear if successful
                             AX = 0001h
                        CF set on error
                             AX = 0000h
            0006h ???
                BX = ???
                ECX = ???
                Return: CF clear if succesful
                            AX = ???
                        CF set on error
                            AX = FFFFh
            0100h get azt16 version
                Return: CF clear
                        AX = version (AH=major, AL=minor)
            0101h
                AX = ???
                ECX = ???
                Return: CF clear if successful
                            AX = 0001h
                        CF set on error
                            AX = 0000h
            0102h ???
                AX = ???
                Return: CF clear if successful
                        CF set on error
                            AX = reason??? (0/1/2)
            0103h ???
                AX = ???
                Return: CF clear if successful
                            AX = 0000h
                        CF set on error
                            AX = reason??? (1/3)
            0200h ???
                EDX = ???
                ???
                Return: CF clear if successful
                            DX:AX = ???
                        CF set on error
                            DX:AX = 0000h:0000h
            0201h ???
                ???
                Return: CF clear
                        AX= 0000h
            else
                Return: CF set
SeeAlso: #02685,#02705
--------W-2F1684BX0460-----------------------
INT 2F P - MS Windows - UNIMODEM - GET API ENTRY POINT
        AX = 1684h
        BX = 0460h (virtual device ID for UNIMODEM device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02687)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02687)
Call UNIMODEM.VXD protected-mode entry point with:
        AX = function number
            0000h
                Return: AX = ???
            0001h
                Return: AX = ???
            0002h
                Return: AX = ???
            0003h
                Return: AX = ???
            0004h
                Return: AX = ???
            0005h
                Return: AX = ???
            0006h
                Return: AX = ???
            0007h
                Return: AX = ???
            else
                Return: AX = 0002h
SeeAlso: #02686,#02688
--------W-2F1684BX0480-----------------------
INT 2F - MS Windows - VNetSup - GET API ENTRY POINT
        AX = 1684h
        BX = 0480h (virtual device ID for VNetSup device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02688)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02688)
Call VNetSup.VXD entry point with:
        AX = function number
            0000h
                Return: AX = ???
            0001h
                Return: AX = ???
            0002h
                Return: AX = ???
            else
                Return: CF set
                        AX = 0001h
SeeAlso: #02687,#02689
--------W-2F1684BX0482-----------------------
INT 2F - MS Windows - VBrowse - GET API ENTRY POINT
        AX = 1684h
        BX = 0482h (virtual device ID for VBrowse device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX0483-----------------------
INT 2F - MS Windows - VSHARE - GET API ENTRY POINT
        AX = 1684h
        BX = 0483h (virtual device ID for VSHARE device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02689)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02689)
Call Windows95 VSHARE.VXD entry point with:
        AX = function number
            0000h get VSHARE version
                Return: AH = major version
                        AL = (BCD?) minor version
            else
                NOP
SeeAlso: #02688
--------W-2F1684BX0484-----------------------
INT 2F P - MS Windows - IFSMgr - GET API ENTRY POINT
        AX = 1684h
        BX = 0484h (virtual device ID for IFSMgr device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX0486-----------------------
INT 2F - MS Windows - VFAT - GET API ENTRY POINT
        AX = 1684h
        BX = 0486h (virtual device ID for VFAT device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX0487-----------------------
INT 2F - MS Windows - NWLINK - GET API ENTRY POINT
        AX = 1684h
        BX = 0487h (virtual device ID for NWLINK device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX0489-----------------------
INT 2F R - MS Windows - VIP - GET API ENTRY POINT
        AX = 1684h
        BX = 0489h (virtual device ID for VIP device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX048A-----------------------
INT 2F - MS Windows 3.11 - VXDLDR - GET API ENTRY POINT
        AX = 1684h
        BX = 048Ah (virtual device ID for VTCP device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX048A-----------------------
INT 2F - MS Windows - VCACHE - GET API ENTRY POINT
        AX = 1684h
        BX = 048Ah (virtual device ID for VCACHE device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02691)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02690)
Call Windows95 VCACHE.VXD entry point with:
        Return: CF set
SeeAlso: #02689,#02691
--------W-2F1684BX048D-----------------------
INT 2F - MS Windows - RASMAC - GET API ENTRY POINT
        AX = 1684h
        BX = 048Dh (virtual device ID for RASMAC device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX048E-----------------------
INT 2F - MS Windows - NWREDIR - GET API ENTRY POINT
        AX = 1684h
        BX = 048Eh (virtual device ID for NWREDIR device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02691)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02691)
Call Windows95 NWREDIR.VXD entry point with:
        Return: CF set
                EAX = FFFFFFFFh
SeeAlso: #02690
--------W-2F1684BX0494-----------------------
INT 2F - MS Windows - NSCL - GET API ENTRY POINT
        AX = 1684h
        BX = 0494h (virtual device ID for NSCL device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02692,#02693)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02692)
Call Windows95 NSCL.VXD virtual-86 entry point with:
        AL = function number
            00h
            01h
            02h
            03h
            04h
            05h
            06h
            07h
            08h
            09h
            0Ah
            else
                Return: AX = FFFFh
SeeAlso: #02691,#02692

(Table 02693)
Call Windows95 NSCL.VXD protected-mode entry point with:
        AL = function number
            00h
            01h
            02h
            03h
            else
                Return: AX = FFFFh
SeeAlso: #02692
--------W-2F1684BX0499-----------------------
INT 2F - MS Windows - PPPMAC - GET API ENTRY POINT
        AX = 1684h
        BX = 0499h (virtual device ID for PPPMAC device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX049A-----------------------
INT 2F - MS Windows - VDHCP - GET API ENTRY POINT
        AX = 1684h
        BX = 049Ah (virtual device ID for VDHCP device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX049B-----------------------
INT 2F - MS Windows - VNBT - GET API ENTRY POINT
        AX = 1684h
        BX = 049Bh (virtual device ID for VNBT device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX1021-----------------------
INT 2F - MS Windows - VMB - GET API ENTRY POINT
        AX = 1684h
        BX = 1021h (virtual device ID for VMB device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX28A0-----------------------
INT 2F - MS Windows - PHARLAPX - GET API ENTRY POINT
        AX = 1684h
        BX = 28A0h (virtual device ID for PHARLAPX device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02694)
                  0000h:0000h if the VxD does not support an API

(Table 02694)
Call PHARLAPX VxD entry point with:
        AX = function
            0001h get PHARLAP.386 version
                Return: AX = version number (AH = major, AL = minor)
        ---queue functions---
            0101h allocate a new message queue
                CX = size of queue data buffer in bytes
                Return: DX:AX = handle for new queue, or 0000h:0000h on error
            0102h allocate a new key queue
                CX = size of queue data buffer in bytes
                EDX = VM handle into which keys will be pasted
                Return: DX:AX = handle for new queue, or 0000h:0000h on error
            0103h free message queue
                EDX = queue handle
                Return: AX = status (0000h,0003h,0007h) (see #02695)
            0104h free key queue
                EDX = queue handle
                Return: AX = status (0000h,0003h,0005h) (see #02695)
            0105h add message to communications queue
                EDX = queue handle
                BX = length of message data in bytes
                CX = length of message header in bytes
                ES:(E)SI -> message header
                GS:(E)DI -> message data
                Return: AX = status (0000h-0003h,0007h) (see #02695)
            0106h remove message from queue
                EDX = queue handle
                CX = length of buffer in bytes
                ES:(E)SI -> buffer for message
                Return: AX = status (0000h,0003h,0006h,0007h,0008h) (see #02695)
                        CX = length of returned message (if AX=0000h or 0008h)
            0107h flush queue (remove all data)
                EDX = queue handle
                Return: AX = status (0000h,0003h) (see #02695)
            0108h add PasteKey structure(s) to key queue
                EDX = queue handle
                CX = number of PasteKey structures in buffer
                ES:(E)SI -> PasteKey array (see #02696)
                Return: AX = status (0000h-0003h) (see #02695)
            0109h register enqueueing callback function
                EDX = queue handle
                ECX = function argument
                ES:(E)SI -> callback function
                Return: AX = status (0000h,0003h,0009h) (see #02695)
            010Ah register dequeueing callback function
                EDX = queue handle
                ECX = function argument
                ES:(E)SI -> callback function
                Return: AX = status (0000h,0003h,0009h) (see #02695)
            010Bh unregister enqueueing callback function
                EDX = queue handle
                Return: AX = status (0000h,0003h,0009h) (see #02695)
            010Ch unregister dequeueing callback function
                EDX = queue handle
                Return: AX = status (0000h,0003h,0009h) (see #02695)
            010Dh get message queue status
                EDX = queue handle
                Return: AX = status (0000h,0003h) (see #02695)
                        CX = number of pending messages
            010Eh peek at message in queue
                EDX = queue handle
                BX = number of message in queue (0000h = first)
                CX = size of buffer in bytes
                ES:(E)SI -> buffer for message
                Return: AX = status (0000h,0003h,0006h,0008h) (see #02695)
                        CX = length of returned message (if AX=0000h or 0008h)
            010Fh peek at last message in queue
                EDX = queue handle
                CX = size of buffer in bytes
                ES:(E)SI -> buffer for message
                Return: AX = status (0000h,0003h,0006h,0008h) (see #02695)
                        CX = length of returned message (if AX=0000h or 0008h)
            0110h replace last message in queue
                EDX = queue handle
                CX = length of message header in bytes
                BX = length of message data in bytes
                ES:(E)SI -> message header
                GS:(E)DI -> message data
                Return: AX = status (0000h,0002h,0003h) (see #02695)
            0111h set permitted message count for queue
                EDX = queue handle
                CX = maximum number of messages to enqueue (FFFFh = unlimited)
                Return: AX = status (0000h,0003h) (see #02695)
        ---generalized VxD services---
            0202h call VxD function
                ES:(E)BX -> in/out register-set buffer
                Return: buffer updated
            0203h map flat
                ???
        --system register functions---
            0301h read system registers into buffer
                ES:(E)SI -> 512-byte buffer
                Return: AX = 0000h
                        buffer filled (mostly zeros)
            0302h copy linear memory into buffer
                EDX = linear address
                CX = number of bytes to copy
                ES:(E)SI -> buffer
                Return: AX = 0000h
            0303h copy data into linear memory
                EDX = linear address
                CX = number of bytes to copy
                ES:(E)SI -> buffer
                Return: AX = 0000h
            0304h freeze VM
                ???
            0305h unfreeze VM
                ???
        ---name registration functions---
            0401h register name
                EDX = magic number to associate with name
                ES:(E)SI -> name to register
                Return: AX = status (0000h,0009h) (see #02695)
            0402h unregister name
                ES:(E)SI -> name to be unregistered
                Return: AX = status (0000h,0009h) (see #02695)
            0403h look up name
                ES:(E)SI -> name to look up
                Return: DX:AX = magic number or 0000h:0000h if not registered
            0404h get name list handle
                Return: DX:AX = name list handle
                                0000h:0000h if not initialized
        ---special DOS server routines (undocumented)---
            0501h register
            0502h unregister
            0503h validate VM
            0504h get INT9 count
            0505h get screen line
            0506h get shift status
            0507h get server PB pointer
            0508h initialize DOS shell
            0509h get last VM handle

(Table 02695)
Values for PHARLAPX function status:
 00h    successful
 01h    data is too large to fit in queue
 02h    queue is full
 03h    invalid queue handle
 04h    invalid VM handle for queue
 05h    error starting a paste operation
 06h    queue is empty
 07h    a VM is blocked waiting on the queue
 08h    message was too long (truncated)
 09h    unable to register or unregister specified callback
SeeAlso: #02694

Format of PHARLAPX PasteKey structure:
Offset  Size    Description     (Table 02696)
 00h    BYTE    ASCII code
 01h    BYTE    scan code (see #00006)
 02h    WORD    shift states
SeeAlso: #02694

Format of PHARLAPX VxD-call register structure:
Offset  Size    Description     (Table 02697)
 00h    DWORD   call number
 04h    WORD    input register map (see #02698)
 06h    WORD    output register map (see #02698)
 08h  7 DWORDs  values for EAX, EBX, ECX, EDX, EBP, ESI, EDI on call
 24h  4 WORDs   values for DS, ES, FG, GS on call
 2Ch    DWORD   EFLAGS on call
 30h  7 DWORDs  returned values of EAX, EBX, ECX, EDX, EBP, ESI, EDI
 4Ch  4 WORDs   returned values of DS, ES, FS, GS
 54h    DWORD   returned EFLAGS
SeeAlso: #02694

Bitfields for PHARLAPX VxD-call register map:
Bit(s)  Description     (Table 02698)
 0      value in EAX field is valid
 1      value in EBX field is valid
 2      value in ECX field is valid
 3      value in EDX field is valid
 4      value in EBP field is valid
 5      value in ESI field is valid
 6      value in EDI field is valid
 7      value in DS field is valid
 8      value in ES field is valid
 9      value in FS field is valid
 10     value in GS field is valid
 11     value in EFLAGS field is valid
SeeAlso: #02697
--------W-2F1684BX28A1-----------------------
INT 2F - MS Windows - PharLap VxD - GET API ENTRY POINT
        AX = 1684h
        BX = 28A1h (virtual device ID for PharLap device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",AX=1684h/BX=28A0h,INT 20"Windows"
--------W-2F1684BX2925-----------------------
INT 2F - MS Windows - EDOS - GET API ENTRY POINT
        AX = 1684h
        BX = 2925h (virtual device ID for EDOS device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02699)
                  0000h:0000h if the VxD does not support an API

(Table 02699)
Call EDOS entry point with:
        AX = 0000h get EDOS version number
            Return: AH = major version
                    AL = minor version
        AX = 0001h display message
            CX = 0
            DX:BX -> ASCIZ Message
        AX = 0002h get EDOS error coded
            Return: EAX = time in milliseconds that Windows has been running
        AX = 0003h execute windows program
            Return: EAX = cumulative amount of time the virtual machine has
                        been active, in milliseconds
        AX = 0008h get/set priority
            BX = 0000h??? foreground
                 0001h background
            DI = 0000h get
                 0001h set
            DX = priority setting
            Return: CX = foreground priority
                    DX = background priority
                    BX:AX = flags
                        00000001h exclusive ON
                        00000010h background ON
                    SI = CPU percentage
--------W-2F1684BX292D-----------------------
INT 2F - MS Windows - VSBPD - GET API ENTRY POINT
        AX = 1684h
        BX = 292Dh (virtual device ID for VSBPD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------W-2F1684BX295A-----------------------
INT 2F - MS Windows - GRVSULTR - GET API ENTRY POINT
        AX = 1684h
        BX = 295Ah (virtual device ID for GRVSULTR device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
--------x-2F1684BX304C-----------------------
INT 2F - Intel Plug-and-Play - CONFIGURATION ACCESS - GET ENTRY POINT
        AX = 1684h
        BX = 304Ch (ID for Configuration Access) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> API entry point (see #02700)
                  0000h:0000h if Configuration Access not loaded
Note:   this API is often provided by a DOS device driver, in which case it
          is available whether or not MSWindows is running
Index:  installation check;Plug-and-Play Configuration Access
SeeAlso: AX=1684h/BX=0034h

(Table 02700)
Call Plug-and-Play Configuration Access entry point with:
        AX = function
            0000h "CA_GetVersion"
                Return: AX = BCD version (AH = major, AL = minor)
            0001h "CA_PCI_Read_Config_Byte" (see also INT 1A/AX=B108h)
        !!!
            0002h "CA_PCI_Read_Config_Word" (see also INT 1A/AX=B109h)
            0003h "CA_PCI_Read_Config_DWord" (see also INT 1A/AX=B10Ah)
            0004h "CA_PCI_Write_Config_Byte" (see also INT 1A/AX=B10Bh)
            0005h "CA_PCI_Write_Config_Word" (see also INT 1A/AX=B10Ch)
            0006h "CA_PCI_Write_Config_DWord" (see also INT 1A/AX=B10Dh)
            0007h "CA_PCI_Generate_Special_Cycle" (see also INT 1A/AX=B106h)
            0008h "CA_PCI_Get_Routing_Options" (see also INT 1A/AX=B10Eh)
            0009h invalid function
            000Ah invalid function
            000Bh "CA_PnPISA_Get_Info"
            000Ch "CA_PnPISA_Read_Config_Byte"
            000Dh "CA_PnPISA_Write_Config_Byte"
            000Eh "CA_PnPISA_Get_Resource_Data"
            000Fh invalid function
            0010h "CA_EISA_Get_Board_ID"
            0011h "CA_EISA_Get_Slot_Config"
            0012h "CA_EISA_Get_SlotFunc_Config"
            0013h "CA_EISA_Clear_NVRAM_Config"
            0014h "CA_EISA_Write_Config"
            0015h invalid function
            0016h "CA_ESCD_Get_Info"
            0017h "CA_ESCD_Read_Config"
            0018h "CA_ESCD_Write_Config"
            0019h invalid function
            001Ah "CA_Acfg_PCI_Manage_IRQs"
                DL = IRQ???
                ES:DI -> ???
                Return: AX = status
            001Bh "CA_Acfg_PCI_Get_Routing_Options"
                ES:DI -> IRQ routing table header
                          (see #01259 at INT 1A/AX=B406h)
                Return: AX = status
            001Ch-001Fh invalid functions
            0020h "CA_PnPB_Get_Num_Sys_Dev_Nodes"
            0021h "CA_PnPB_Get_Sys_Dev_Node"
            0022h "CA_PnPB_Set_Sys_Dev_Node"
            0023h "CA_PnPB_Get_Stat_Res_Info"
            0024h "CA_PnPB_Set_Stat_Res_Info"
Return: AX = FFFFh if unsupported function
SeeAlso: #02701
--------W-2F1684BX3099-----------------------
INT 2F - MS Windows - VVidramD - GET API ENTRY POINT
        AX = 1684h
        BX = 3099h (virtual device ID for VVidramD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02701)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02701)
Call VVidramD (VIDRAM.VXD) virtual-86 entry point with:
        AX = function number
            0000h map page???
                BX = page number???
                Return: CF clear if successful
                        CF set on error
            0001h ???
                Return: CF clear if successful
                        CF set on error
            else
                Return: CF set
SeeAlso: #02700,#02702
--------W-2F1684BX30F6-----------------------
INT 2F P - MS Windows - WSVV - GET API ENTRY POINT
        AX = 1684h
        BX = 30F6h (virtual device ID for WSVV device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02702)
Call WSVV.VXD protected-mode entry point with:
        AX = function number
            ????
        Return: ???
SeeAlso: #02701,#02703
--------W-2F1684BX310E-----------------------
INT 2F - MS Windows - WPS - GET API ENTRY POINT
        AX = 1684h
        BX = 310Eh (virtual device ID for WPS device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02703)
                  0000h:0000h if the VxD does not support an API
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02703)
Call WPS protected-mode entry point with:
        DX = function
            0000h get WPS.386 version
                Return: CF clear
                        AX = version (AH = major, AL = minor)
            0001h get number of installed VxDs
                Return: CF clear
                        AX = number of installed VxDs
            0002h get VxD characteristics
                AX = number of VxD
                ES:BX -> buffer for VxD characteristics structure (see #02704)
                Return: CF clear
                        ES:BX buffer filled
SeeAlso: #02702,#02706

Format of WPS.386 VxD characteristics structure:
Offset  Size    Description     (Table 02704)
 00h    WORD    VxD ID number
 02h    BYTE    VxD minor version
 03h    BYTE    VxD major version
 04h    BYTE    DDK minor version
 05h    BYTE    DDK major version
 06h    WORD    flags
                bit 0: V86 API supported
                bit 1: PM API supported
                bit 2: services supported
 08h    DWORD   start order
 0Ch  9 BYTEs   ASCIZ VxD name
SeeAlso: #02703
--------W-2F1684BX3110-----------------------
INT 2F - MS Windows - VSGLX16.386 - GET API ENTRY POINT
        AX = 1684h
        BX = 3110h (virtual device ID for VSGLX16.386) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02705)
                  0000h:0000h if the VxD does not support an API
SeeAlso: AX=1684h/BX=045Fh,AX=1684h"DEVICE API",INT 20"Windows"

(Table 02705)
Call VSGLX16.386 entry point with:
        DX = function number
            0000h get azt16 version
                Return: CF clear
                        AX = version returned by "azt16" device
            0001h get ???
                AX = ??? (always fails if nonzero)
                ES:BX -> buffer for ???
                        first DWORD of buffer must be set to length of buffer
                          (in bytes, 1 <= size <= 92) before calling
                Return: CF clear if successful
                            AX = 0001h
                        CF set on error (invalid pointer, bad buffer size)
                            AX = 0000h
            0002h
                AX = ???
                BX = ???
                Return: CF clear if successful
                            AX = ???
                        CF set on error
                            AX = error code
            0003h
                AX = ???
                BX = ???
                Return: CF clear if successful
                        CF set on error
            0004h set ???
                ES:DI -> buffer containing ???
                BX = ???
                CX = number of bytes to copy
                Return: CF clear if successful
                            AX = 0001h
                        CF set on error
                            AX = 0000h
            0005h get ???
                ES:DI -> buffer for ???
                BX = ???
                CX = number of bytes to copy
                Return: CF clear if successful
                            AX = 0001h
                        CF set on error
                            AX = 0000h
            else
                Return: CF set
SeeAlso: #02686
--------W-2F1684BX31CF-----------------------
INT 2F - MS Windows - STAT.386 - GET API ENTRY POINT
        AX = 1684h
        BX = 31CFh (virtual device ID for STAT.386) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02706)
                  0000h:0000h if the VxD does not support an API
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02706)
Call STAT.386 entry point with:
        AX = function
            0000h get version
                Return: AX = STAT.386 version (AH = major, AL = minor)
            0001h execute RDMSR/WRMSR/RDTSC
                BH = 00h
                BL = second opcode byte (30h=WRMSR,31h=RDTSC,32h=RDMSR)
                EDX:EDI = value to be written (for BL=30h)
                ECX = MSR number for RDMSR/WRMSR
                Return: EDX:EAX = value read (RDTSR/RDMSR only)
SeeAlso: #02703,#02707
--------W-2F1684BX34DC-----------------------
INT 2F - QEMM v8.01 - MAGNARAM VxD - GET API ENTRY POINT
        AX = 1684h
        BX = 34DCh (virtual device ID for MAGNARAM) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02707)
                  0000h:0000h if the VxD does not support an API
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02707)
Call MAGNARAM MAGNA95.VXD protected-mode entry point with:
        AX = function number
            0000h get version and ???
                Return: AX = version (AH = major, AL = minor)
                        CX = ???
                            bit 0: ???
                            bit 1: ???
            0001h get ???
                Return: CF clear
                        DX:AX = ??? SHL 2
            0002h
                Return: CF clear if successful
                            AX = ???
                            DX = ???
                        CF set on error
            0003h get ???
                Return: CF clear
                        DX:AX = ??? SHL 2
            0004h ???
                Return: CF clear
                        DX:AX = ???
            0005h ???
                Return: CF clear
                        DX:AX = ???
            0006h ???
                Return: CF clear
                        DX:AX = ???
            0007h ???
                Return: CF clear
                        DX:AX = ???
            0008h ???
                Return: CF clear
                        DX:AX = ???
            0009h ???
                Return: CF clear
                        DX:AX = ???
            000Ah ???
                Return: CF clear
                        DX:AX = ???
            000Bh get ???
                Return: CF clear
                        DX:AX = ??? SHL 2
            000Ch get ???
                Return: CF clear
                        DX:AX = ??? SHL 2
            000Dh get ???
                Return: CF clear
                        DX:AX = ??? SHL 2
            000Eh get ???
                Return: CF clear
                        AX = ???
                        DX = ???
            000Fh get ???
                Return: CF clear
                        DX:AX = ???
            0010h get ???
                Return: CF clear
                        DX:AX = ???
            0011h get ???
                Return: CF clear
                        DX:AX = ???
            0012h get ???
                Return: CF clear
                        DX:AX = ???
            0013h get ???
                Return: CF clear
                        DX:AX = ???
            0014h get ???
                Return: CF clear
                        DX:AX = ???
            0015h get ???
                Return: CF clear
                        DX:AX = ???
            else
                Return: CF set
SeeAlso: #02706,#02708
--------W-2F1684BX357E-----------------------
INT 2F - MS Windows - DSOUND - GET API ENTRY POINT
        AX = 1684h
        BX = 357Eh (virtual device ID for DSOUND device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"
----------2F1684BX377B-----------------------
INT 2F - MS Windows - MX1501HAD - GET API ENTRY POINT
        AX = 1684h
        BX = 377Bh (virtual device ID for MX1501HAD device)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02708)
                  0000h:0000h if the VxD does not support an API
Note:   The drivers VCMD95C.VXD and VCMD.386 are part of the driver disks
          provided with the chip-card-reader/keyboard combination MX 1501 HAD,
          produced by Cherry
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02708)
Call CHERRY VCMD95C.VXD entry point with:
        AX = function
            0001h get version
                Return: AX = version number (0100h) (AH = major, AL = minor)
            0002h hook INT 09 (and 8???)
            0003h unhook INT 09 (and 8???)
            0004h get number of bytes in FIFO
                Return: AX = bytes in FIFO
            0005h get next FIFO-data
                Return: AX = data
                        BL = port number
                        BH = direction (1=in, 0=out)
                        DX:CX = timestamp
            0006h clear FIFO
            0007h output byte
                DX = port number
                BL = keyboard command
                Return: data in FIFO (see #02710)
                       (value, port, in/out, timestamp)
            0008h input byte
                DX = port number
                Return: data in FIFO (see #02710)
                        (value, port, in/out, timestamp)
            0009h input byte immediately
                DX = port number
                Return: AX = data
            000Ah read next FIFO data (nondestructive)
                Return: AX = data
                        BL = port number
                        BH = direction (1=in, 0=out)
                        DX:CX = timestamp
            000Bh get timestamp
                Return: DX:CX = timestamp (in ms)
            000Ch enable IRQ 1
            000Dh disable IRQ 1
            000Eh enable data retrieval
                Note:   Sets a flag in the internal mode-byte which
                          tells the driver to recognize the data
            000Fh disable data retrieval
                Note:   resets a flag in the internal mode-byte
            0010h get retrieval mode
                Return: AX = current retrieval mode
            0011h set retrieval mode
                BX = new retrieval mode (see #02709)
                Return: AX = old retrieval mode
            0012h get command value
                Return: AX = command value
            0013h set command value
                BX = command value
SeeAlso: #02706,#02711

Bitfields for retrieval mode:
Bit(s)  Description     (Table 02709)
 0      enable data retrieval
 1      0 = interrupt-driven
        1 = polling mode
 2      0 = read port 60h everytime
        1 = read port 60h only when OBF of port 64h is set
 3      0 = don't call old INT 9
        1 = call INT 9 before our INT-handler
 4-7    reserved
SeeAlso: #02708,#02710

Format of FIFO entry (1024 entries in FIFO):
Offset  Size    Description     (Table 02710)
 00h    BYTE    data byte
 01h    BYTE    I/O port
 02h    BYTE    direction (1=in, 0=out)
 03h    BYTE    reserved
 04h    DWORD   timestamp
SeeAlso: #02708,#02709
--------W-2F1684BX38DA-----------------------
INT 2F - MS Windows - VIWD - GET API ENTRY POINT
        AX = 1684h
        BX = 38DAh (virtual device ID for VIWD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02711)
                  0000h:0000h if the VxD does not support API in current mode
SeeAlso: AX=1684h"DEVICE API",INT 20"Windows"

(Table 02711)
Call VIWD.VXD entry point with:
        DX = function number
            0000h ???
                Return: CF clear
                        AX = ???
            0004h ???
                Return: CF clear
                        DX = 0000h
            0006h
                Return: CF clear
            000Ah
                AX = ???
                Return: CF clear if successful
                        CF set on error
            000Ch
            000Dh
            000Eh
                Return: CF clear
            000Fh
                Return: CF clear
            0010h
            0011h
            0015h
                Return: CF clear if successful
                            AX = ???
                        CF set on error
                            AX = ???
                        DX = 0000h
            0016h
            0017h
                Return: CF clear if successful
                            AX = ???
                        CF set on error
                            AX = ???
                        DX = 0000h
            0018h ???
                CX = ???
                Return: CF clear if successful
                            AX = 0000h
                        CF set on error
            else
                Return: CF set
SeeAlso: #02708,#02712
--------W-2F1684BX4321-----------------------
INT 2F - MS Windows - POSTMSG - GET API ENTRY POINT
        AX = 1684h
        BX = 4321h (virtual device ID for POSTMSG device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02712,#02714)
                  0000h:0000h if the VxD does not support an API

(Table 02712)
Call POSTMSG protected-mode entry point with:
        AX = window handle
        CX:BX -> callback procedure (see #02713)
Return: nothing
Note:   this call registers a WinApp with the VxD; the callback must be in a
          fixed, non-discardable code segment
SeeAlso: #02714,#02715

(Table 02713)
Values POSTMSG callback routine is called with:
        STACK:  DWORD   "lParam" parameter from DOSApp
                WORD    "wParam" parameter from DOSApp
                WORD    Windows message number (WM_USER + 100h)
                WORD    registered HWND

(Table 02714)
Call POSTMSG V86-mode entry point with:
        BX = wParam value to pass to protected-mode callback
        DX:AX = lParam value to pass to protected-mode callback
Return: CF clear if successful
        CF set on error (no WinApp registered)
SeeAlso: #02712
--------W-2F1684BX7FE0-----------------------
INT 2F - MS Windows - VSWITCHD - GET API ENTRY POINT
        AX = 1684h
        BX = 7FE0h (virtual device ID for VSWITCHD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02715)
                  0000h:0000h if the VxD does not support an API

(Table 02715)
Call VSWITCHD entry point with:
        AX = function
            0000h toggle windowed mode (simulate Alt-Enter keypress)
                Return: nothing
            0001h get windowed mode
                Return: CF clear if VM is windowed
                        CF set if VM is full-screen
SeeAlso: #02712,#02716
--------W-2F1684BX8888-----------------------
INT 2F - MS Windows - VbillD - GET API ENTRY POINT
        AX = 1684h
        BX = 8888h (virtual device ID for VbillD device) (see #02642)
        ES:DI = 0000h:0000h
Return: ES:DI -> VxD API entry point (see #02716)
                  0000h:0000h if the VxD does not support an API

(Table 02716)
Call VbillD entry point with:
        AX = function
            0001h set reverse video
            0002h set normal video
Return: ???
SeeAlso: #02715
--------W-2F1685-----------------------------
INT 2F - MS Windows - SWITCH VMs AND CALLBACK
        AX = 1685h
        BX = VM ID of virtual machine to switch to
        CX = flags (see #02717)
        DX:SI = priority boost (refer to VMM.INC)
        ES:DI -> FAR procedure to callback
Return: CF set on error
            AX = error code
                01h invalid VM ID
                02h invalid priority boost
                03h invalid flags
        CF clear if successful
            event will be or has been called
Notes:  some DOS devices, such as networks, need to call functions in a
          specific VM. This call forces the appropriate VM to be installed.
        the callback procedure must preserve all registers and return with IRET
SeeAlso: AX=1683h,INT 15/AX=1117h,AX=DB06h"WINGO"

Bitfields for VM switching flags:
Bit(s)  Description     (Table 02717)
 0      wait until interrupts enabled
 1      wait until critical section unowned
 2-15   reserved (zero)
--------E-2F1686-----------------------------
INT 2F - DOS Protected-Mode Interface - DETECT MODE
        AX = 1686h
Return: AX = 0000h if operating in protected mode under DPMI (INT 31 available)
        AX nonzero if in real/V86 mode or no DPMI (INT 31 not available)
SeeAlso: AX=1687h
--------E-2F1687-----------------------------
INT 2F - DOS Protected-Mode Interface - INSTALLATION CHECK
        AX = 1687h
Return: AX = 0000h if installed
            BX = flags
                bit 0: 32-bit programs supported
            CL = processor type (02h=80286, 03h=80386, 04h=80486)
            DH = DPMI major version
            DL = two-digit DPMI minor version (binary)
            SI = number of paragraphs of DOS extender private data
            ES:DI -> DPMI mode-switch entry point (see #02718)
        AX nonzero if not installed
SeeAlso: AX=1686h,AX=43E0h,AX=DE01h/BX=4450h,AX=FB42h/BX=0001h
SeeAlso: INT 31/AX=0400h,INT 31/AX=5702h,INT D4/AH=10h

(Table 02718)
Call DPMI mode switch entry point with:
        AX = flags
            bit 0: set if 32-bit program
        ES = real mode segment of buffer for DPMI private data (ignored if
                SI was zero)
Return: CF set on error
            program still in real mode
            AX = error code (DPMI 1.0+)
               8011h unable to allocate all necessary descriptors
               8021h 32-bit program specified, but 16-bit DPMI host
        CF clear if successful
            CS = 16-bit selector corresponding to real-mode CS
            SS = selector corresponding to real-mode SS (64K limit)
            DS = selector corresponding to real-mode DS (64K limit)
            ES = selector to program's PSP (100h byte limit)
            FS = GS = 0
            high word of ESP = 0 if 32-bit program
            program now in protected mode
Note:   this entry point is only called for the initial switch to protected
          mode
--------W-2F1688BX0BAD-----------------------
INT 2F U - MS Windows 3.0, 386MAX v6.01 - GET ALIAS SELECTOR TO LDT
        AX = 1688h
        BX = 0BADh
Return: AX = 0000h if supported
            BX = alias selector for LDT
Note:   use the LSL instruction or GetSelectorLimit() to find LDT size
        this call should be considered obsolete for Windows 3.1+, as the
          alias selector can be retrieved via the API entry point for
          "MS-DOS" retrieved from INT 2F/AX=168Ah (see #02720)
SeeAlso: AX=1687h,#02720
--------W-2F1689-----------------------------
INT 2F U - MS Windows 3.0+ - KERNEL IDLE CALL
        AX = 1689h
        ???
Return: ???
Desc:   the Windows KERNEL idle loop calls this function, which VMM uses as an
          indication that the system is idle, which in turn generates INT 28
          and INT 2F/AX=1607h/BX=0018h callouts
SeeAlso: AX=1680h,AX=1607h/BX=0018h,INT 15/AX=1000h,INT 28
--------E-2F168A-----------------------------
INT 2F - DPMI 0.9+ - GET VENDOR-SPECIFIC API ENTRY POINT
        AX = 168Ah
        DS:(E)SI = selector:offset of ASCIZ vendor name (see #02719)
Return: AL = status
            00h successful
               ES:(E)DI -> extended API entry point
            8Ah unsuccessful
Notes:  the vendor name is used to determine which entry point to return; it is
          case-sensitive
        available in protected mode only
        32-bit applications use ESI and EDI, 16-bit applications use SI and DI
        this call is present but not documented for DPMI 0.9
        the Borland C++ 3.1 DPMILOAD does not handle requests for entry points
          other than the MS-DOS one gracefully, producing an unhandled
          exception report; this has been fixed in the Borland Pascal 7 version
SeeAlso: AX=1687h,INT 31/AX=0A00h,INT 31/AH=57h

(Table 02719)
Values for DPMI vendor-specific API names:
 "MS-DOS"       MS Windows and 386MAX v6.00+ (see #02720)
 "386MAX"       386MAX v6.00+
 "HELIX_DPMI"   Helix Netroom's DPMI server
 "Phar Lap"     Phar Lap 286|DOS-Extender RUN286 (see #02721)
 "RATIONAL DOS/4G"  DOS/4G, DOS/4GW
 "VIRTUAL SUPPORT"  Borland 32RTM

(Table 02720)
Call Windows-support ("MS-DOS") entry point with:
        AX = 0100h get LDT alias selector
Return: CF clear if successful
            AX = alias selector
        CF set on error
SeeAlso: #02719,AX=1688h/BX=0BADh

(Table 02721)
Call Phar Lap RUN286 entry point with:
        AX = 0000h (function "load MSW")
        BX = new value for MSW register (low word of CR0)
Return: ???
SeeAlso: #02719
--------W-2F168B-----------------------------
INT 2F - MS Windows 3.1 - SET FOCUS TO SPECIFIED VIRTUAL MACHINE
        AX = 168Bh
        BX = virtual machine ID (see AX=1683h), 0000h for current DOS box
Return: AL = 00h if focus set to specified VM
Notes:  documented on the Microsoft Developer's Network CD-ROM
        if the VM is a windowed DOS box, it will be set to full screen
SeeAlso: AX=1683h
--------W-2F168C-----------------------------
INT 2F - MS Windows 3.1 - RESTART COMMAND
        AX = 168Ch
        ???
Return: ???
Note:   WIN.COM executes specified application
--------W-2F168EDX0000-----------------------
INT 2F - Windows95 - TITLE - SET APPLICATION TITLE
        AX = 168Eh
        DX = 0000h
        ES:DI -> ASCIZ application title (max 79 chars+NUL)
Return: AX = status
            0000h failed
            0001h successful
Note:   if ES:DI is 0000h:0000h or points at an empty string, the current
          title is removed
BUG:    this function can return a successful status even though the title was
          not changed; reportedly, waiting for two clock ticks after program
          startup solves this problem
SeeAlso: AX=168Eh/DX=0001h,AX=168Eh/DX=0002h
--------W-2F168EDX0001-----------------------
INT 2F - Windows95 - TITLE - SET VIRTUAL MACHINE TITLE
        AX = 168Eh
        DX = 0001h
        ES:DI -> ASCIZ virtual machine title (max 29 chars+NUL)
Return: AX = status
            0000h failed
            0001h successful
Notes:  if ES:DI is 0000h:0000h or points at an empty string, the current
          title is removed
        the VM title should only be changed on explicit instruction from the
          user
BUG:    this function can return a successful status even though the title was
          not changed; reportedly, waiting for two clock ticks after program
          startup solves this problem
SeeAlso: AX=168Eh/DX=0000h,AX=168Eh/DX=0003h
--------W-2F168EDX0002-----------------------
INT 2F - Windows95 - TITLE - GET APPLICATION TITLE
        AX = 168Eh
        DX = 0002h
        ES:DI -> buffer for ASCIZ application title
        CX = size of buffer in bytes
Return: AX = status
            0000h failed
            0001h successful
Desc:   copy as much of the application's window title as possible to the given
          buffer, appending a terminating NUL to the buffer
SeeAlso: AX=168Eh/DX=0000h,AX=168Eh/DX=0003h
--------W-2F168EDX0003-----------------------
INT 2F - Windows95 - TITLE - GET VIRTUAL MACHINE TITLE
        AX = 168Eh
        DX = 0003h
        ES:DI -> buffer for ASCIZ virtual-machine title
        CX = size of buffer in bytes
Return: AX = status
            0000h failed
            0001h successful
Desc:   copy as much of the virtual machine's title as possible to the given
          buffer, appending a terminating NUL to the buffer
SeeAlso: AX=168Eh/DX=0001h,AX=168Eh/DX=0002h
--------W-2F168FDH00-------------------------
INT 2F - Windows95 - CLOSE-AWARENESS - ENABLE/DISABLE CLOSE COMMAND
        AX = 168Fh
        DH = 00h
        DL = new state
            00h disabled
            01h enabled
Return: AX = status
            0000h successful
            else failed
Desc:   enable or disable the system menu Close command for an application
SeeAlso: AX=168Fh/DH=01h,AX=168Fh/DH=02h
--------W-2F168FDH01-------------------------
INT 2F - Windows95 - CLOSE-AWARENESS - QUERY CLOSE
        AX = 168Fh
        DH = 01h
        DL = 00h (reserved)
Return: AX = status
            0000h Close command selected but not yet acknowledged
            0001h Close command issued and acknowledged
            168Fh Close command not selected -- application should continue
Desc:   determine whether the user has requested that the application be closed
          by selecting the system menu's Close option
SeeAlso: AX=168Fh/DH=00h,AX=168Fh/DH=02h
--------W-2F168FDH02-------------------------
INT 2F - Windows95 - CLOSE-AWARENESS - ACKNOWLEDGE CLOSE
        AX = 168Fh
        DH = 02h
        DL = 00h (reserved)
Return: AX = status
            0000h successful
            else failed
Note:   once a Close command has been issued, no further keyboard input is
          available to the application until it calls this function to
          acknowledge the Close request
SeeAlso: AX=168Fh/DH=00h,AX=168Fh/DH=03h
--------W-2F168FDH03-------------------------
INT 2F - Windows95 - CLOSE-AWARENESS - CANCEL CLOSE
        AX = 168Fh
        DH = 03h
        DL = 00h (reserved)
Return: AX = status
            0000h successful
            else failed
Desc:   cancels a close request which has already been acknowledged if the
          application determines that it will not exit at this time
SeeAlso: AX=168Fh/DH=00h,AX=168Fh/DH=03h
--------D-2F1690-----------------------------
INT 2F U - MS-DOS 7 kernel - GET/SET ???
        AX = 1690h
        ES:BX -> ???
Return: ES:BX -> ??? data (see #02722)
SeeAlso: AX=1611h,AX=1614h

Format of MS-DOS 7 kernel ??? data:
Offset  Size    Description     (Table 02722)
 00h    DWORD   -> ??? data (appears to list the installed drivers)
 04h    DWORD   -> ??? (value passed in via ES:BX is stored here)
--------!---Section--------------------------
Interrupt List, part 12 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------W-2F1700-----------------------------
INT 2F - MS Windows "WINOLDAP" - IDENTIFY WinOldAp VERSION
        AX = 1700h
Return: AX = 1700h if this version of WINOLDAP doesn't support clipboard
        AX <> 1700h
            AL = WINOLDAP major version
            AH = WINOLDAP minor version
Program: WinOldAp (WINOLDAP.MOD) is a Microsoft Windows extension supporting
          "old" (character-mode) application access to Dynamic Data Exchange,
          menus, and the Windows clipboard.
Note:   this installation check DOES NOT follow the format used by other
          software of returning AL=FFh
SeeAlso: AX=1701h,AX=4601h
Index:  installation check;WINOLDAP
--------W-2F1701-----------------------------
INT 2F - MS Windows "WINOLDAP" - OPEN CLIPBOARD
        AX = 1701h
Return: AX = status
            nonzero success
            0000h   clipboard is already open
SeeAlso: AX=1700h,AX=1702h,AX=1703h,AX=1704h,INT 16/AX=CB00h
--------W-2F1702-----------------------------
INT 2F - MS Windows "WINOLDAP" - EMPTY CLIPBOARD
        AX = 1702h
Return: AX = status
            nonzero clipboard has been emptied
            0000h   failure
SeeAlso: AX=1700h,AX=1701h,AX=1703h,AX=1704h,INT 16/AX=CB05h
--------W-2F1703-----------------------------
INT 2F - MS Windows "WINOLDAP" - SET CLIPBOARD DATA
        AX = 1703h
        DX = clipboard format supported by WinOldAp (see #02723)
        ES:BX -> data (see #02724,#02725)
        SI:CX = size of data
Return: AX = status
            nonzero data copied into the Clipboard
            0000h   failure
SeeAlso: AX=1701h,AX=1705h,INT 16/AX=CB04h

(Table 02723)
Values for WinOldAp clipboard format:
 01h    text
 02h    bitmap
 03h    metafile picture
 04h    SYLK
 05h    DIF
 06h    TIFF
 07h    OEM text
 08h    DIB bitmap
 80h    special format (used by Windows WRITE, maybe other Windows applets???)
 81h    DSP text
 82h    DSP bitmap

Format of Windows Clipboard bitmap:
Offset  Size    Description     (Table 02724)
 00h    WORD    type (0000h)
 02h    WORD    width of bitmap in pixels
 04h    WORD    height of bitmap in pixels
 06h    WORD    bytes per line
 08h    BYTE    number of color planes
 09h    BYTE    number of adjacent color bits in pixel
 0Ah    DWORD   pointer to start of data
 0Eh    WORD    width in 0.1mm units
 10h    WORD    height in 0.1mm units
 12h  N BYTEs   bitmap data

Format of Windows metafile picture:
Offset  Size    Description     (Table 02725)
 00h    WORD    mapping mode
 02h    WORD    X extent
 04h    WORD    Y extent
 06h    WORD    picture data
--------W-2F1704-----------------------------
INT 2F - MS Windows "WINOLDAP" - GET CLIPBOARD DATA SIZE
        AX = 1704h
        DX = clipboard format supported by WinOldAp (see #02723)
Return: DX:AX = size of data in bytes, including any headers
                0000h:0000h if no data in this format in the Clipboard
Note:   Windows reportedly rounds up the size of the data to a multiple of 32
          bytes
SeeAlso: AX=1700h,AX=1703h,AX=1705h
--------W-2F1705-----------------------------
INT 2F - MS Windows "WINOLDAP" - GET CLIPBOARD DATA
        AX = 1705h
        DX = clipboard format supported by WinOldAp (see #02723)
        ES:BX -> buffer
Return: AX = status
            nonzero success
            0000h   error, or no data in this format in Clipboard
SeeAlso: AX=1700h,AX=1704h,INT 16/AX=CB03h
--------W-2F1708-----------------------------
INT 2F - MS Windows "WINOLDAP" - CloseClipboard
        AX = 1708h
Return: AX = status
            0000h failure
            nonzero success
--------W-2F1709-----------------------------
INT 2F - MS Windows "WINOLDAP" - COMPACT CLIPBOARD
        AX = 1709h
        SI:CX = desired size in bytes
Return: DX:AX = number of bytes in largest block of free memory
Note:   WinOldAp is responsible for including the size of any headers
--------W-2F170A-----------------------------
INT 2F - MS Windows "WINOLDAP" - GET DEVICE CAPABILITIES
        AX = 170Ah
        DX = GDI information index (see #02726)
Return: AX = integer value of the desired item
              (see #02727,#02728,#02729,#02730,#02731,#02732,#02733)
Note:   This function returns the device-capability bits for the given display

(Table 02726)
Values for GDI information index:
 00h    device driver version
 02h    device classification
 04h    width in mm
 06h    height in mm
 08h    width in pixels
 0Ah    height in pixels
 0Ch    bits per pixel
 0Eh    number of bit planes
 10h    number of brushes supported by device
 12h    number of pens supported by device
 14h    number of markers supported by device
 16h    number of fonts supported by device
 18h    number of colors
 1Ah    size required for device descriptor
 1Ch    curve capabilities
 1Eh    line capabilities
 20h    polygon capabilities
 22h    text capabilities
 24h    clipping capabilities
 26h    bitblt capabilities
 28h    X aspect
 2Ah    Y aspect
 2Ch    length of hypotenuse of aspect
 58h    logical pixels per inch of width
 5Ah    logical pixels per inch of height
SeeAlso: #02727,#02728,#02729,#02730,#02731,#02732,#02733

(Table 02727)
Values for device classification:
 00h    vector plotter
 01h    raster display
 02h    raster printer
 03h    raster camera
 04h    character-stream, PLP
 05h    Metafile, VDM
 06h    display-file
SeeAlso: #02726,#02728,#02729,#02730,#02731,#02732,#02733

Bitfields for curve capabilities:
Bit(s)  Description     (Table 02728)
 0      circles
 1      pie wedges
 2      chord arcs
 3      ellipses
 4      wide lines
 5      styled lines
 6      wide styled lines
 7      interiors
SeeAlso: #02726,#02727,#02729,#02730,#02731,#02732,#02733

Bitfields for line capabilities:
Bit(s)  Description     (Table 02729)
 1      polylines
 2      markers
 3      polymarkers
 4      wide lines
 5      styled lines
 6      wide styled lines
 7      interiors
SeeAlso: #02726,#02727,#02728,#02730,#02731,#02732,#02733

Bitfields for polygon capabilities:
Bit(s)  Description     (Table 02730)
 0      polygons
 1      rectangles
 2      trapezoids
 3      scanlines
 4      wide borders
 5      styled borders
 6      wide styled borders
 7      interiors
SeeAlso: #02726,#02727,#02728,#02729,#02731,#02732,#02733

Bitfields for text capabilities:
Bit(s)  Description     (Table 02731)
 0      output precision character
 1      output precision stroke
 2      clippping precision stroke
 3      90-degree character rotation
 4      arbitrary character rotation
 5      independent X and Y scaling
 6      double-size
 7      integer scaling
 8      continuous scaling
 9      bold
 10     italic
 11     underline
 12     strikeout
 13     raster fonts
 14     vector fonts
 15     reserved
SeeAlso: #02726,#02727,#02728,#02729,#02730,#02732,#02733

(Table 02732)
Values for clipping capabilities:
 00h    none
 01h    clipping to rectangles
SeeAlso: #02726,#02727,#02728,#02729,#02730,#02731,#02733

Bitfields for raster capabilities:
Bit(s)  Description     (Table 02733)
 0      simple bitBLT
 1      device requires banding support
 2      device requires scaling support
 3      supports >64K bitmap
SeeAlso: #02726,#02727,#02728,#02729,#02730,#02731,#02732
----------2F18-------------------------------
INT 2F U - MS-Manager
        AH = 18h
        ???
Return: ???
--------l-2F1900-----------------------------
INT 2F U - DOS 4.x only SHELLB.COM - INSTALLATION CHECK
        AX = 1900h
Return: AL = status
            00h not installed
            FFh installed
--------l-2F1901-----------------------------
INT 2F U - DOS 4.x only SHELLB.COM - SHELLC.EXE INTERFACE
        AX = 1901h
        BL = SHELLC type
            00h transient
            01h resident
        DS:DX -> far call entry point for resident SHELLC.EXE
Return: ES:DI -> SHELLC.EXE workspace within SHELLB.COM
Note:   SHELLB.COM and SHELLC.EXE are parts of the DOS 4.x shell
--------l-2F1902-----------------------------
INT 2F U - DOS 4.x only SHELLB.COM - COMMAND.COM INTERFACE
        AX = 1902h
        ES:DI -> ASCIZ full filename of current batch file, with at least the
                  final filename element uppercased
        DS:DX -> buffer for results
Return: AL = 00h  failed, either
                (a) final filename element quoted at ES:DI does not match
                      identity of shell batch file quoted as parameter of most
                      recent call of SHELLB command, or
                (b) no more Program Start Commands available.
        AL= FFh  success, then:
                memory at DS:[DX+1] onwards filled as:
                DX+1:   BYTE    count of bytes of PSC
                DX+2: N BYTEs   Program Start Command text
                        BYTE    0Dh terminator
Desc:   COMMAND.COM executes the result of this call in preference to
          reading a command from a batch file.  Thus the batch file does not
          advance in execution for so long as SHELLB provides PSCs from its
          workspace.
Note:   The PSCs are planted in SHELLB workspace by SHELLC, the user
          menu interface.  The final PSC of a sequence is finished with a
          GOTO COMMON, which causes a loop back in the batch file which called
          SHELLC so as to execute SHELLC again.  The check on batch file name
          permits PSCs to CALL nested batch files while PSCs are still stacked
          up for subsequent execution.
--------l-2F1903-----------------------------
INT 2F U - DOS 4.x only SHELLB.COM - COMMAND.COM interface
        AX = 1903h
        ES:DI -> ASCIZ batch file name as for AX=1902h
Return: AL = status
            FFh quoted batch file name matches last SHELLB parameter
            00h it does not
--------l-2F1904-----------------------------
INT 2F U - DOS 4.x only SHELLB.COM - SHELLB transient to TSR intrface
        AX = 1904h
Return: ES:DI -> name of current shell batch file:
                WORD    number of bytes of name following
                BYTEs   (8 max) uppercase name of shell batch file
----------2F1980-----------------------------
INT 2F U - IBM ROM-DOS v4.0 - INSTALLATION CHECK
        AX = 1980h
Return: AL = FFh if ??? installed/supported
Note:   called at the very beginning of SHELLSTB.COM, which exits if AL is not
          FFh on return
SeeAlso: AX=1981h,AX=1982h
----------2F1981-----------------------------
INT 2F U - IBM ROM-DOS v4.0 - GET ??? STRING
        AX = 1981h
        DS:DX -> buffer for ???
Return: AL = status
            FFh if successful
                DS:DX buffer filled (refer to note below)
            81h on error
Note:   the first byte of the buffer is unchanged; depending on a byte in
          IBMBIO.COM, the remainder of the buffer is filled with either
          "C:\ROMSHELL.COM",0Dh or xxh,xxh,0Fh,"C:\ROMSHELL.COM",0Dh
SeeAlso: AX=1980h,AX=1982h
----------2F1982-----------------------------
INT 2F U - IBM ROM-DOS v4.0 - GET ??? TABLE
        AX = 1982h
Return: AL = FFh if supported
            ES:DI -> ??? table (see #02734)
Note:   called by ROMSHELL.COM
SeeAlso: AX=1980h,AX=1981h

Format of ROM-DOS v4.0 ??? table:
Offset  Size    Description     (Table 02734)
 00h    BYTE    ??? (00h)
 01h    BYTE    ??? (41h) (ROMSHELL.COM checks if =00h)
 02h    BYTE    ??? (00h) (ROMSHELL.COM checks if =01h)
 03h    WORD    ??? (0001h) (ROMSHELL.COM checks if =0001h)
 05h    BYTE    ??? (00h)
 06h    WORD    ??? (04D5h)
--------V-2F1A00-----------------------------
INT 2F - DOS 4.0+ ANSI.SYS - INSTALLATION CHECK
        AX = 1A00h
Return: AL = FFh if installed
Notes:  AVATAR.SYS also responds to this call
        documented for DOS 5+, but undocumented for DOS 4.x
--------V-2F1A00BX414E-----------------------
INT 2F - ANSIPLUS.SYS v2.00+ - INSTALLATION CHECK
        AX = 1A00h
        BX = 414Eh ('AN')
        CX = 5349h ('SI')
        DX = 2B2Bh ('++')
Return: AL = FFh if installed
            CF clear
            ES:BX -> INT 29 entry point
            CX = ANSIPLUS BCD version number (v3.10+, CH=major, CL=minor)
            DL = capabilities (v4.00+)
                00h full capability driver
                01h reduced capability driver
                2Bh full capability driver (before v4.00)
Program: ANSIPLUS.SYS is a CON device driver by Kristofer Sweger which
          replaces the normal ANSI.SYS with a more powerful version having
          many additional features
Notes:  ANSIPLUS also identifies itself as ANSI.SYS if BX,CX, or DX differ
          from the magic values above
        an additional installation check is to test for the signature
          "ANSIPLUS" 12 bytes before the INT 29 entry point; the version
          number is also available as a four-character ASCII string (e.g.
          "4.00") four bytes before the entry point
SeeAlso: AX=1AA5h,AX=1AA6h,AX=1AA7h,AX=1AA8h,AX=1AA9h,AX=1AAAh,AX=D44Fh
--------V-2F1A00BX4156-----------------------
INT 2F - AVATAR.SYS - INSTALLATION CHECK
        AX = 1A00h
        BX = 4156h ('AV')
        CX = 4154h ('AT')
        DX = 4152h ('AR')
Return: AL = FFh if installed
            CF clear
            BX = AVATAR protocol level supported
            CX = driver type
                0000h AVATAR.SYS
                4456h DVAVATAR.COM inside DESQview window
            DX = 0016h
Program: AVATAR.SYS is a CON replacement by George Adam Stanislav which
          interprets AVATAR command codes in the same way that ANSI interprets
          ANSI command codes
Notes:  AVATAR also identifies itself as ANSI.SYS if BX, CX, or DX differ from
          the magic values
SeeAlso: AX=1A21h,AX=1A3Ch,AX=1A3Fh,AX=1A52h,AX=1A72h,AX=1A7Dh,AX=1AADh"AVATAR"
--------V-2F1A01-----------------------------
INT 2F U - DOS 4.0+ ANSI.SYS internal - GET/SET DISPLAY INFORMATION
        AX = 1A01h
        CL = function
            7Fh for GET
            5Fh for SET
        DS:DX -> parm block as for INT 21,AX=440Ch,CX=037Fh/035Fh respectively
Return: CF clear if successful
            AX destroyed
        CF set on error
            AX = error code (many non-standard)
Note:   presumably this is the DOS IOCTL interface to ANSI.SYS
SeeAlso: AX=1A02h,INT 21/AX=440Ch
--------V-2F1A02-----------------------------
INT 2F U - DOS 4.0+ ANSI.SYS internal - MISCELLANEOUS REQUESTS
        AX = 1A02h
        DS:DX -> parameter block (see #02735)
Return: CF clear if successful
        CF set on error
            AX = error code
Note:   DOS 5+ chains to previous handler if AL > 02h on call
SeeAlso: AX=1A01h

Format of ANSI.SYS parameter block:
Offset  Size    Description     (Table 02735)
 00h    BYTE    subfunction
                00h set/reset interlock
                01h get /L flag
 01h    BYTE    interlock state
                00h=reset, 01h=set
                  This interlock prevents some of the ANSI.SYS post-processing
                  in its hook onto INT 10, AH=00h mode set
 02h    BYTE    (returned)
                00h if /L not in effect
                01h if /L in effect
--------V-2F1A21-----------------------------
INT 2F - AVATAR.SYS - SET DRIVER STATE
        AX = 1A21h (AL='!')
        DS:SI -> command string with one or more state characters (see #02736)
        CX = length of command string
Return: CF set on error (invalid subfunction)
        CF clear if successful
Note:   the characters in the state string are interpreted left to right, and
          need not be in any particular order
SeeAlso: AX=1A00h/BX=4156h,AX=1A3Fh

(Table 02736)
Values for AVATAR.SYS state characters:
 'a'    activate driver
 'd'    disable driver
 'f'    use fast screen output
 'g'    always convert gray keys (+ and -) to function keys
 'G'    never convert gray keys
 'l'    convert gray keys only when ScrollLock active
 's'    use slow screen output
 't'    Tandy 1000 keyboard (not yet implemented)
--------V-2F1A3C-----------------------------
INT 2F U - AVATAR.SYS v0.11 - ???
        AX = 1A3Ch
        ???
Return: CX = 0000h
SeeAlso: AX=1A00h/BX=4156h,AX=1A21h,AX=1A3Eh
--------V-2F1A3E-----------------------------
INT 2F U - AVATAR.SYS v0.11 - ???
        AX = 1A3Eh
        CL = ???
        CH = ???
        DL = ???
        DH = ???
Return: CL = ???
        CH = ???
        DL = ???
        DH = ???
SeeAlso: AX=1A3Ch,AX=1A3Fh
--------V-2F1A3F-----------------------------
INT 2F - AVATAR.SYS - QUERY DRIVER STATE
        AX = 1A3Fh (AL='?')
        ES:DI -> buffer
        CX = length of buffer in bytes
Return: CF clear
        CX = actual size of returned info
Note:   the returned information consists of multiple letters whose meanings
          are described under AX=1A21h
SeeAlso: AX=1A00h/BX=4156h,AX=1A21h,AX=1A44h
--------S-2F1A42BX4156-----------------------
INT 2F - AVATAR Serial Dispatcher - INSTALL IRQ3 HANDLER
        AX = 1A42h
        BX = 4156h ('AV')
        ES:DI -> FAR handler for serial port using IRQ3
        DS = data segment needed by handler
Return: AX = status/return value
            0000h if no more room
            1A42h if ASD not installed
            else handle to use when uninstalling
Notes:  the handler need not save/restore registers or signal EOI to the
          interrupt controller
        the handler should return AX=0000h if the interrupt was meant for it,
          and either leave AX unchanged or return a non-zero value otherwise
        the most recently installed handler will be called first, continuing
          to earlier handlers until one returns AX=0000h
SeeAlso: AX=1A43h,AX=1A62h
--------S-2F1A43BX4156-----------------------
INT 2F - AVATAR Serial Dispatcher - INSTALL IRQ4 HANDLER
        AX = 1A43h
        BX = 4156h ('AV')
        ES:DI -> FAR handler for serial port using IRQ4
        DS = data segment needed by handler
Return: AX = status/return value
            0000h if no more room
            1A43h if ASD not installed
            else handle to use when uninstalling
Notes:  (see AX=1A42h)
SeeAlso: AX=1A42h,AX=1A63h
--------V-2F1A44BX4156-----------------------
INT 2F - AVATAR.SYS v0.11+ - GET DATA SEGMENT
        AX = 1A44h
        BX = 4156h ('AV')
Return: AX = 0000h
        DS = data segment
        CX = size of data segment
Note:   AVATAR.SYS calls this function whenever it is invoked.  If each
          process under a multitasker hooks this function and provides a
          separate data segment, AVATAR.SYS becomes fully reentrant.
SeeAlso: AX=1A21h,AX=1A3Fh,AX=1A52h
--------V-2F1A52-----------------------------
INT 2F U - AVATAR.SYS v0.11 - GET ???
        AX = 1A52h
        CX = size of buffer
        ES:DI -> buffer
Return: ??? copied into user buffer
Note:   the maximum size of the data which may be copied is returned by
          AX=1A72h
SeeAlso: AX=1A53h,AX=1A72h
--------V-2F1A53-----------------------------
INT 2F U - AVATAR.SYS v0.11 - ???
        AX = 1A53h
        CL = ??? (00h-05h)
        ???
Return: ???
SeeAlso: AX=1A00h/BX=4156h,AX=1A52h,AX=1A72h
--------S-2F1A62BX4156-----------------------
INT 2F - AVATAR Serial Dispatcher - UNINSTALL IRQ3 HANDLER
        AX = 1A62h
        BX = 4156h ('AV')
        CX = handle for IRQ routine returned by AX=1A42h
SeeAlso: AX=1A42h,AX=1A63h
--------S-2F1A63BX4156-----------------------
INT 2F - AVATAR Serial Dispatcher - UNINSTALL IRQ4 HANDLER
        AX = 1A63h
        BX = 4156h ('AV')
        CX = handle for IRQ routine returned by AX=1A43h
SeeAlso: AX=1A43h,AX=1A62h
--------V-2F1A72-----------------------------
INT 2F U - AVATAR.SYS v0.11 - GET ??? SIZE
        AX = 1A72h
Return: CX = maximum size of ???
SeeAlso: AX=1A00h/BX=4156h,AX=1A52h,AX=1A7Bh,AX=1AADh"AVATAR"
--------V-2F1A7B-----------------------------
INT 2F U - AVATAR.SYS v0.11 - ???
        AX = 1A7Bh
Return: AX = 0000h
        CX = 0000h
SeeAlso: AX=1A00h/BX=4156h,AX=1A72h,AX=1A7Dh
--------V-2F1A7D-----------------------------
INT 2F U - AVATAR.SYS v0.11 - ???
        AX = 1A7Dh
Return: AX = ???
SeeAlso: AX=1A00h/BX=4156h,AX=1A7Bh
--------V-2F1AA3-----------------------------
INT 2F - ANSIPLUS v4.03+ - GET/SET ANSIPLUS INTERNAL VARIABLES
        AX = 1AA3h
        BH = function
            00h get current/default colors
                Return: CH = default colors
                        CL = current colors
            01h set current/default colors
                CH = default colors (00h = leave unchanged)
                CL = current colors
            02h get current subscreen region
                Return: BH,BL = true screen rows,columns
                        CH,CL = top left row,column of region
                        DH,DL = bottom right row,column of region
            03h set subscreen region
                CH,CL = top left row,column of region
                DH,DL = bottom right row,column of region
            04h get driver features (bits 0-31)
                Return: DX:CX = current feature bits
            05h set driver features (bits 0-31)
                DX:CX = feature bits
            06h get driver features (bits 32-63)
                Return: DX:CX = current feature bits
            07h set driver features (bits 32-63)
                DX:CX = feature bits
            other: reserved for future use
SeeAlso: AX=1AA4h,AX=1AA5h
--------V-2F1AA4-----------------------------
INT 2F - ANSIPLUS v4.02+ - GET/SET ANSIPLUS SMOOTH SCROLLING RATE
        AX = 1AA4h
        BL = function
            00h get scrolling rate
            01h set scrolling rate
                BH = new minimum scrolling rate in scan lines per retrace
Return: BH = smooth scrolling rate
SeeAlso: AX=1AA3h,AX=1AA5h
--------V-2F1AA5-----------------------------
INT 2F - ANSIPLUS v4.00+ - GET/SET ANSIPLUS CLIPBOARD
        AX = 1AA5h
        DH = subfunction
            00h get clipboard information
            01h get clipboard text
            02h set clipboard text
            03h append text to clipboard
            04h clear clipboard
            05h paste clipboard to keyboard
        ES:BX -> data area for subfunctions 01h, 02h, and 03h
        CX = size of data area (maximum size for subfunction 01h, actual size
            to add to clipboard for subfunctions 02h and 03h)
Return: AL = status
            00h successful
            01h unsupported subfunction (reduced capability driver)
            02h insufficient space
            A5h unsupported function (ANSIPLUS before v4.00)
        ES:BX -> ANSIPLUS local clipboard data
        CX = number of bytes currently in local clipboard
        DX = maximum size of local clipboard
SeeAlso: AX=1A00h/BX=414Eh,AX=1AA4h,AX=1AA6h
--------V-2F1AA6-----------------------------
INT 2F - ANSIPLUS v4.00+ - ENABLE/DISABLE ANSIPLUS DRIVER
        AX = 1AA6h
        BH = function
            00h get hooked interrupts
            01h set hooked interrupts mask
                BL = new interrupts mask (see #02737)
Return: BL = previous interrupts mask (see #02737)
SeeAlso: AX=1A00h/BX=414Eh,AX=1AA7h

Desc:   used to temporarily disable any prior copies of ANSIPLUS when a new
          copy is installed, such as in a multitasking system like DESQview
Note:   only the most-recently loaded copy of ANSIPLUS on the current INT 2F
          chain responds to this call

Bitfields for ANSIPLUS hooked interrupts mask:
Bit(s)  Description     (Table 02737)
 0      INT 09 hook disabled
 1      INT 10 hook disabled
 2      INT 15 hook disabled
 3      INT 16 hook disabled
 4      INT 1C hook disabled
 5      reset all bits when INT 29 called
 6      INT 29 hook disabled
 7      INT 33, INT 74, or other mouse event hook disabled
--------V-2F1AA7-----------------------------
INT 2F - ANSIPLUS v4.00+ - ENABLE/DISABLE ANSIPLUS FEATURES
        AX = 1AA7h
        BL = function
            00h prevent scroll-back saves
            01h enable scroll-back saves
            02h disable key reprogramming and lock changes by escape sequences
            03h enable key reprogramming by escape sequences
            04h disable and lock key stacking changes by escape sequences
            05h allow key stacking by escape sequences
Return: nothing
SeeAlso: AX=1AA6h
--------V-2F1AA8-----------------------------
INT 2F - ANSIPLUS v3.10+ - GET NEXT ANSIPLUS SCROLLBACK LINE
        AX = 1AA8h
Return: AL = status
            00h successful
                ES:BX -> screen line (character and attribute pairs)
                CX = length of line in bytes, 0000h if no more lines or
                      unsupported video mode
            01h unsupported video mode active
            02h screen currently scrolled back
            03h reduced capability driver
            A8h unsupported function (driver before v3.10)
SeeAlso: AX=1A00h/BX=414Eh,AX=1AA9h
--------V-2F1AA9-----------------------------
INT 2F - ANSIPLUS v3.10+ - GET ANSIPLUS SCROLLBACK INFORMATION
        AX = 1AA9h
Return: AL = status
            00h successful
                BX = current number of lines in scrollback buffer
                CX = number of bytes in one line
            01h unsupported video mode active
            02h screen currently scrolled back
            03h reduced capability driver
            A9h unsupported function (driver before v3.10)
Desc:   determine how much data is in the scrollback buffer and initialize
          scrollback retrieval to return the first line on the next call to
          AX=1AA8h
SeeAlso: AX=1A00h/BX=414Eh,AX=1AA8h
--------V-2F1AAA-----------------------------
INT 2F - ANSIPLUS v3.01+ - GET/SET ANSIPLUS SCREEN SAVER BLANKING TIME
        AX = 1AAAh
        BX = function
            FFFFh to get current blanking time
            other to set time
                CX = blanking time in clock ticks (0000h-7FFFh)
Return: BX = current blanking time
        CX = blanking time when last set
SeeAlso: AX=1A00h/BX=414Eh,AX=1AABh
--------V-2F1AAB-----------------------------
INT 2F - ANSIPLUS v3.01+ - SET ANSIPLUS KEY REPEAT RATE
        AX = 1AABh
        BX = repeat rate in characters per second
            0000h use BIOS repeat rate
Return: nothing
SeeAlso: AX=1A00h/BX=414Eh,AX=1AAAh,AX=1AACh
--------V-2F1AAC-----------------------------
INT 2F - ANSIPLUS v3.00+ - LOAD CHARACTER GENERATOR
        AX = 1AACh
        BH = number of bytes per character pattern
        BL = VGA/EGA character table to be loaded
        CX = number of characters to load
        DX = starting character code (offset into Map2 block)
        ES:BP -> user character table to be loaded
Return: AX = 1100h
Desc:   load the EGA/VGA character generator without the BIOS function's
          side effects of resetting the video mode and color palette
SeeAlso: AX=1A00h/BX=414Eh,AX=1AABh,AX=1AADh"ANSIPLUS",INT 10/AX=1100h
--------V-2F1AAD-----------------------------
INT 2F - ANSIPLUS v2.00+ - ANSIPLUS DEVICE STATUS REPORT
        AX = 1AADh
        BL = report request code (81h-96h for v4.00)
        CX = color selector or key code, if required by request
Return: AX = first reported result
        BX = second result
        CX = third result, if applicable (unchanged otherwise)
        DX = fourth result, if applicable (unchanged otherwise)
Desc:   get device status reports equivalent to those for Esc [#n sequences
          while bypassing any device redirection and avoiding the need to
          parse the returned result
Note:   the report request code in BL is identical to the number in the
          corresponding Esc [#n sequence
SeeAlso: AX=1A00h/BX=414Eh,AX=1AACh
--------V-2F1AADDX0000-----------------------
INT 2F U - AVATAR.SYS v0.11 - ???
        AX = 1AADh
        DX = 0000h
        CX = subfunction (00h-0Ch)
        ???
Return: AX = 0000h if DX was nonzero
        ???
SeeAlso: AX=1A00h/BX=4156h,AX=1A72h
--------m-2F1B00-----------------------------
INT 2F U - DOS 4+ XMA2EMS.SYS extension internal - INSTALLATION CHECK
        AX = 1B00h
Return: AL = FFh if installed
Note:   XMA2EMS.SYS extension is only installed if DOS has page frames to hide.
        This extension hooks onto INT 67/AH=58h and returns from that call data
          which excludes the physical pages being used by DOS.
SeeAlso: AH=1Bh"FRAME INFO"
--------m-2F1B-------------------------------
INT 2F U - DOS 4+ XMA2EMS.SYS extension internal - GET HIDDEN FRAME INFORMATION
        AH = 1Bh
        AL <> 00h
        DI = hidden physical page number
Return: AX = FFFFh if failed (no such hidden page)
        AX = 0000h if OK, then
            ES = segment of page frame
            DI = physical page number
Notes:  this corresponds to the data edited out of the INT 67/AH=58h call
        FASTOPEN makes this call with AL = FFh
SeeAlso: AX=1B00h
--------V-2F2300-----------------------------
INT 2F - DR DOS 5.0 GRAFTABL - INSTALLATION CHECK
        AX = 2300h
Return: AH = FFh
Note:   this installation check does not follow the usual format
SeeAlso: AH=23h,AX=2E00h
--------V-2F23-------------------------------
INT 2F - DR DOS 5.0 GRAFTABL - GET GRAPHICS DATA
        AH = 23h
        AL nonzero
Return: AH = FFh
        ES:BX -> graphics data (8 bytes for each character from 80h to FFh)
SeeAlso: AX=2300h,AX=2E00h
--------T-2F2700-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - INSTALLATION CHECK
        AX = 2700h
Return: AL = status
            00h not installed
            FFh installed
Note:   the TaskMAX API is also supported by Novell DOS 7 TASKMGR in both
          taskswitching and multitasking modes
--------T-2F2701-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - GET STATUS
        AX = 2701h
Return: AX = maximum simultaneous tasks
        BX = index into TASK_IDS of current foreground task
        CX = currently-active tasks
        DX = version number (DL = major, DH = minor)
            (DR DOS 6.0 = 0001h, Novell DOS 7 = 0002h)
        ES:SI -> TASK_IDS
        ES:DI -> name table (array of 8-byte names, NUL-terminated if <8 chars)
Notes:  do not attempt to create a new task if CX == AX
        the task's index is its position on the task menu, while its ID is the
          position within the internal task name table
SeeAlso: AX=2714h,AX=2716h
--------T-2F2702-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - GET PER-TASK EMS LIMIT
        AX = 2702h
Return: DX = maximum pages INT 67/AH=42h will report available
Note:   TaskMAX does not limit EMS allocations other than by limiting the
          amount which is reported as being available at a given time
SeeAlso: AX=2703h,INT 67/AH=42h
--------T-2F2703-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - SET PER-TASK EMS LIMIT
        AX = 2703h
        DX = maximum pages INT 67/AH=42h should report available
Return: DX = new maximum for reporting
Note:   the TaskMAX API is also supported by Novell DOS 7 TASKMGR in
          both taskswitching and multitasking modes
SeeAlso: AX=2702h,INT 67/AH=42h
--------T-2F2704-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - REGISTER/UNREGISTER TASK MANAGER
        AX = 2704h
        DL = subfunction
            00h unregister task manager
            01h register task manager
Return: DL = status
            00h registered
            01h unregistered
Notes:  a task manager replaces TaskMAX's menu system with its own user
          interface; while one is registered, the TaskMAX hotkeys and
          Ctrl-Alt-Del invoke the manager rather than the built-in menu system
        unregister the task manager before terminating it
SeeAlso: AX=2705h
Index:  hotkeys;TaskMAX
--------T-2F2705-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - ENABLE/DISABLE DIRECT SWITCHING
        AX = 2705h
        DL = subfunction
            00h disable keystrokes for switching to next/prev/specified task
            01h enable
Return: nothing
Note:   should only be called by a registered task manager (see AX=2704h)
SeeAlso: AX=2704h,AX=2706h
--------T-2F2706-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - SWITCH TO SPECIFIED TASK
        AX = 2706h
        DX = task index (see AX=2701h) of task to be activated
Return: DX = task index of previously-active task
Note:   the TaskMAX API is also supported by Novell DOS 7 TASKMGR in
          both taskswitching and multitasking modes
SeeAlso: AX=2705h,AX=2707h,AX=2715h
--------T-2F2707-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - CREATE NEW TASK
        AX = 2707h
        DS:DX -> ASCIZ pathname of executable
        ES:BX -> parameter block (see #02738)
        CX = number of ticks before automatic return to task manager
                (0000h = run until termination or explicitly switched)
Return: DX = new task's task index (FFFFh if task terminated)
SeeAlso: AX=2706h,AX=2708h

Format of TaskMAX parameter block:
Offset  Size    Description     (Table 02738)
 00h    WORD    reserved, should be 0000h
 02h    DWORD   pointer to command tail to be copied into child's PSP
 06h    DWORD   pointer to first FCB to be copied into child's PSP
 0Ah    DWORD   pointer to second FCB to be copied into child's PSP
--------T-2F2708-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - DELETE TASK
        AX = 2708h
        DX = task index
Return: DX = FFFFh (task deleted)
Notes:  this call should only be used for abnormal task termination, after
          first checking for open files with AX=270Ch; should not be used
          with programs that allocate EMS or XMS memory
        switches to specified task first
SeeAlso: AX=2707h
--------T-2F2709-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - NAME TASK
        AX = 2709h
        DX = task index
        DS:SI -> 8-byte name (8 NULs = remove name)
Return: AL = task flags
            00h ID unused or task terminated
            01h ID in use, task name table entry valid
            81h ID in use, task name fixed
        BX = task ID
        ES:DI -> name in task name table (see AX=2701h)
Note:   the task retains the given name until it terminates or the name is
          removed by specifying a name of 8 NULs.
SeeAlso: AX=2701h,AX=2707h
--------T-2F270A-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - CONVERT TASK INDEX TO TASK ID
        AX = 270Ah
        DX = task index
Return: DX = task ID (FFFFh if index invalid)
Note:   task IDs stay constant, while indexes can change when other tasks are
          deleted
SeeAlso: AX=2701h,AX=270Bh
--------T-2F270B-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - CONVERT TASK ID TO TASK INDEX
        AX = 270Bh
        DX = task ID
Return: DX = task index (FFFFh if task not active)
Note:   the TaskMAX API is also supported by Novell DOS 7 TASKMGR in both
          taskswitching and multitasking modes
SeeAlso: AX=270Ah
--------T-2F270C-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - CHECK OPEN FILES
        AX = 270Ch
        DX = task index
Return: AX = number of files currently open for specified task
SeeAlso: AX=2708h
--------T-2F270D-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - CHECK IF TASK RUNNING PRIMARY COMMAND INTERPRETER
        AX = 270Dh
        DX = task index
Return: DX = status
            0000h if primary command interpreter (COMMAND.COM, etc.) running
            0001h if not in root shell for task
Note:   TaskMAX will return 0001h if the specified task has spawned another
          command interpreter with AX=2707h
SeeAlso: AX=2707h,AX=270Ch
--------T-2F270E-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - GET/SET TEXT PASTE LEAD-IN
        AX = 270Eh
        CX = length of string (max 15 keystrokes, 0000h to get current string)
        DS:SI -> pasting lead-in string (character/scan-code pairs)
Return: ES:DI -> current lead-in string
Note:   the specified sequence of keystrokes is sent to the application before
          every line of a text-mode spreadsheet paste
SeeAlso: AX=270Fh,AX=2710h,AX=2713h
--------T-2F270F-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - GET/SET NUMERIC PASTE LEAD-IN
        AX = 270Fh
        CX = length of string (max 15 keystrokes, 0000h to get current string)
        DS:SI -> pasting lead-in string (character/scan-code pairs)
Return: ES:DI -> current lead-in string
Note:   the specified sequence of keystrokes is sent to the application before
          every number in a numeric-mode spreadsheet paste
SeeAlso: AX=270Eh,AX=2710h,AX=2711h,AX=2713h
--------T-2F2710-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - GET/SET PASTE LINE TERMINATOR STRING
        AX = 2710h
        CX = length of string (max 15 keystrokes, 0000h to get current string)
        DS:SI -> pasting terminator string (character/scan-code pairs)
Return: ES:DI -> current terminator string
Note:   the specified sequence of keystrokes is sent to the application after
          every line of a spreadsheet paste operation
SeeAlso: AX=270Eh,AX=270Fh,AX=2713h
--------T-2F2711-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - GET/SET NUMERIC PASTE DECIMAL POINT
        AX = 2711h
        DX = ASCII code for separator (FFFFh to get current)
Return: DL = current separator character
SeeAlso: AX=270Fh
--------T-2F2712-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - INITIATE EXPORTING TASK DATA
        AX = 2712h
        DX = task index
--------T-2F2713-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - INITIATE PASTE OPERATION
        AX = 2713h
        DX = task index
        CX = paste mode
            0000h alphanumeric
            0001h numeric
            0002h text
SeeAlso: AX=270Eh,AX=270Fh,AX=2710h,AX=2711h
--------T-2F2714-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - GET SWAP SPACE INFO
        AX = 2714h
Return: CX = total KB of swap space
        DX = available KB of swap space
Note:   the TaskMAX API is also supported by Novell DOS 7 TASKMGR in both
          taskswitching and multitasking modes
SeeAlso: AX=2701h
--------T-2F2715-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - SWITCH TO TASK MANAGER
        AX = 2715h
Return: only after calling task is again selected
SeeAlso: AX=2706h
--------T-2F2716-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - GET PASTE BUFFER STATUS
        AX = 2716h
Return: AX = 0000h if AX=2716h,AX=2717h,AX=2718h supported
            CX = bytes in paste buffer
            DX = current generation number (updated after every copy operation)
BUG:    Novell DOS 7 TASKMGR returns AX=0000h even though it does not support
          this call (it does support the remainder of the TaskMAX API)
SeeAlso: AX=2701h,AX=2713h,AX=2714h,AX=2717h,AX=2718h
--------T-2F2717-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - PASTE DATA DIRECTLY TO APPLICATION BUFFER
        AX = 2717h
        CX = bytes in destination buffer
        ES:DI -> destination buffer
Return: AX = 0000h if function supported
            CX = bytes actually copied (FFFFh if buffer too small)
            DX = current generation number for paste buffer
BUG:    Novell DOS 7 TASKMGR returns AX=0000h even though it does not support
          this call (it does support the remainder of the TaskMAX API)
Note:   the destination buffer may be too small if another task adds more data
          to the paste buffer after the AX=2716h call but before this call
SeeAlso: AX=2713h,AX=2716h,AX=2718h
--------T-2F2718-----------------------------
INT 2F - DR DOS 6.0 TaskMAX - COPY DATA DIRECTLY INTO PASTE BUFFER
        AX = 2718h
        CX = bytes in source buffer
        DS:SI -> source buffer (plain ASCII, lines terminated with CR LF)
Return: AX = 0000h if function supported
            CX = bytes actually copied
            DX = current generation number for paste buffer
BUG:    Novell DOS 7 TASKMGR returns AX=0000h even though it does not support
          this call (it does support the remainder of the TaskMAX API)
SeeAlso: AX=2712h,AX=2716h,AX=2717h
--------T-2F2719-----------------------------
INT 2F - Novell DOS 7 TaskMGR - NOP
        AX = 2719h to 271Bh
--------T-2F271C-----------------------------
INT 2F U - Novell DOS 7 TaskMGR - ???
        AX = 271Ch
        DX = ???
            bit 0: ???
Return: ???
        ---if DX bit 0 set---
        AX = 0031h
        CX = 0000h
BUG:    if the task switcher is running, and DX bit 0 is set on call, this
          function will crash because its exit code attempts to pop several
          registers which are not pushed when DX bit 0 is set
--------m-2F2780CL01-------------------------
INT 2F U - Novell DOS 7 - EMM386.EXE - MULTITASKING API - SUPERVISOR MODULE
        AX = 2780h
        CL = 01h (module: Supervisor)
        CH = subfunction
            00h unused
                Return: CX = status (0002h) (see #02739)
            01h unused
                Return: CX = status (0002h) (see #02739)
            02h "Z_ModuleReg" register an OS module
                EBX = module number (0005h-000Fh)
                DS:EDX -> module descriptor (see #02741)
                Return: CX = status (0000h,0030h) (see #02739)
            03h allocate SYSDAT memory
                DX = number of ??? to allocate
                Return: CX = status (0000h,0003h) (see #02739)
            04h get selector to SYSDAT
                Return: CX = 0000h (successful)
                        BX = selector for EMM386 data segment
                        EBX high word cleared
            05h "Z_MoveReal" relocate segment into extended memory
                DS:EDX -> descriptor parameter block
                Return: ECX = status (00h,03h,31h,32h) (see #02739)
                        ---if successful---
                        parameter block filled
            06h "Z_Reboot" return to real mode via triple fault
            07h debugger break
                Note:   calls INT 03, then INT 21/AH=02h to output a question
                          mark
            08h "X_ForeCheck" check if domain is in foreground
                Return: CX = 0000h (successful)
                        EBX = ??? (0 or 2)
            09h register VxD with system
            0Ah unload VxD hook
            0Bh indicate end of initialization phase
                Return: CX = status (0002h) (see #02739)
            0Ch "F_AllocWindow" allocate 4K mapping window
            0Dh "F_RegisterBoot" register reboot addresses
                EBX = ???
                EDX = ???
                Return: ???
            0Eh "F_EnquireBoot" check if reboot active
                Return: CX = 0000h (successful)
                        BL = ???     \ or BX = 0000h
                        BH = ???     /
            0Fh get debugging level
                Return: CX = 0000h (successful)
                        EBX = new value for debugging level
            10h set debugging level
                EDX = ???
                Return: CX = 0000h (successful)
                        EBX = old value of debugging level
            11h installation check (documented)
                Return: CX = status
                            0000h if multitasker is installed
                                EBX = version (0100h for v1.00)
                            1101h if multitasker is not present
            12h "F_V86BPInstall" install V86 breakpoint
                DX = ???
                Return: CX = 0000h (successful)
                        AX = old value of ???
            13h "F_V86BPRemove" remove V86 breakpoint
                Return: CX = status (0000h,003Fh) (see #02739)
                        AX = ???
            14h "F_V86BPOffer" indicate INT 03 to be used as V86 breakpoint
                EDX = linear address ??? of INT 03 instruction for breakpoint
                Return: CX = status (0000h,003Fh) (see #02739)
            15h "F_LoaderCleanup" offer opportunity to clean up
                BX = segment of ???
                Return: CX = 0000h (successful)
                        BX = segment of ???
            16h "F_RegisterVxDWindow" register VxD mapping window
            17h "F_RegisterPNW" register Personal NetWare information
                EBX = subfunction (0-2)
                Return: CX = status (0002h if EBX>2) (see #02739)
                        ???
            18h unused
                Return: CX = status (0002h) (see #02739)
Return: CX = status (most subfunctions)
        (E)AX and/or (E)BX contain return values, depending on function
Notes:  called by DPMS.EXE and EMM386.EXE
        this API is only available if AX=12FFh/BX=0EDCh returns successfully;
          because the request is handled on the initial trap to the memory
          manager caused by INT instructions, this API must be invoked with
          an actual INT 2F instruction instead of some simulation such as a
          far call to the address in the interrupt vector table
SeeAlso: AX=12FFh/BX=0EDCh,AX=2780h/CL=02h,AX=2780h/CL=03h,AX=2780h/CL=04h

(Table 02739)
Values for Novell DOS 7 EMM386 function status:
 0000h  successful
 0001h  not implemented
 0002h  invalid subfunction
 0003h  unable to find memory
 0004h  invalid flag (semaphore) number
 0005h  flag (semaphore) overrun
 0006h  flag (semaphore) underrun
 0007h  no queue handles available
 0009h  no queue buffers available
 000Ah  queue is in use
 000Bh  invalid process handle
 000Ch  no process handles available
 000Dh  queue access not permitted
 000Eh  queue is empty
 000Fh  queue is full
 0012h  no memory handles available
 0014h  can't find process in process list
 001Bh  invalid memory handle
 0023h  unable to terminate process
 002Ah  flag set ignored
 002Dh  no more system flags
 002Eh  flag (semaphore) not in idle state
 002Fh  flag (semaphore) wait timed out
 0030h  bad module number in CL
 0031h  bad descriptor
        invalid value for DESC_PB_SINFO in a descriptor parameter block
 0032h  no free descriptors
 0033h  error while locking/unlocking a page
 0034h  error getting or setting a page
 0035h  no pages available
 0036h  invalid domain
 0037h  process already frozen
 0038h  process not frozen
 0039h  fork failure (no registered swaplist)
 003Ah  page already free
 003Bh  page already allocated
 003Ch  unable to switch tasks
 003Dh  attempted to free critical section which is not active
 003Eh  too many active critical sections
 003Fh  ???
 41FFh  current domain is invalid, or no domain in context
 42FFh  domain ID is not a valid descriptor
 43FFh  domain creation still in progress
 44FFh  domain currently being deleted
 45FFh  task manager is busy, cannot unload it
 46FFh  task manager already loaded
 47FFh  task manager not yet loaded
 48FFh  cannot save/restore because prior switch not complete
 49FFh  console already has owner
 4BFFh  unsupported opcode
 4CFFh  32-bit address prefix not supported
 4FFFh  timeout, but not on timer queue
 50FFh  unable to lock timer queue
 53FFh  unable to switch while in Global Message Mode
 54FFh  error while setting Global Message Mode
 55FFh  not in Global Message Mode
 56FFh  system already in Domain Message Mode
 57FFh  not in Domain Message Mode
 58FFh  unable to allocate timeout structure
 59FFh  unsupported video type
 5AFFh  function not handled by any VM
 5BFFh  error in Serial..Set call
 5CFFh  error in Parallel..Set call
 5DFFh  domain list overflowed
 5FFFh  unable to free domain while in nobuffers mode

Format of Novell DOS/OpenDOS EMM386 descriptor parameter block:
Offset  Size    Description     (Table 02740)
 00h    DWORD   "DESC_PB_BASE"
 04h    DWORD   "DESC_PB_LIMIT"
 08h    WORD    "DESC_PB_SEL"
 0Ah    BYTE    "DESC_PB_MINFO"
 0Bh    BYTE    "DESC_PB_SINFO"
SeeAlso: #02741

Format of Novell DOS/OpenDOS EMM386 module descriptor:
Offset  Size    Description     (Table 02741)
 00h 12 BYTEs   descriptor parameter block (see #02740)
 0Ch    DWORD   -> module entry point
Note:   for function "Z_ModuleReg", only DESC_PB_SEL and the module entry point
          need to be initialized before calling EMM386
SeeAlso: #02740
--------m-2F2780CL02-------------------------
INT 2F U - Novell DOS 7 - EMM386.EXE - MULTITASKING API - REAL-TIME MONITOR
        AX = 2780h
        CL = 02h (module: Real-Time Monitor)
        CH = subfunction
            00h ???
                ???
                Return: CX = status (0000h,0023h, others???) (see #02739)
                        BX = ??? (0000h if CX=0000h, FFFFh if CX=0023h)
                Note:   calls func 04h/sf 03h, func 04h/sf 1Eh,func 02h/sf 43h,
                          func 02h/sf 0Bh, and func 04h/sf 01h
            01h "Z_PCountGet" get and clear count of dispatches
                DX = ??? handle or 0000h for default
                Return: CX = status (0000h,000Bh) (see #02739)
                        EBX = old value of ??? if successful
                        EDX destroyed
            02h "Z_FlagWait" wait on semaphore
                DX = index of semaphore???
                Return: CX = status (0000h,0004h,0005h) (see #02739)
                        EBX = 0000FFFFh on error, 00000000h if successful
            03h "Z_FlagSet" set a semaphore flag
                DX = index of semaphore???
                Return: CX = status (0000h,0004h,0006h) (see #02739)
                        BX = FFFFh on error, 0000h if successful
            04h "X_QCreate" create a new queue
                Return: CX = status (0000h,0007h,000Ah) (see #02739)
            05h "X_QOpen" open queue for reading/writing
                EDX -> ??? data (first 8 bytes seem to be name)
                Return: CX = status (0000h,0009h,000Dh) (see #02739)
            06h "X_QDelete" delete a queue
                Note:   calls fn 02h/subfn 05h, then fn 02h/subfn 40h
            07h "X_QRead" read message from queue
                EDX = ???
                Return: CX = status (0000h,0009h,000Eh) (see #02739)
            08h "X_QReadC" read message from queue, if any
                EDX = ???
                Return: CX = status (0000h,0009h,000Eh) (see #02739)
            09h "X_QWrite" write message to queue
                EDX = ???
                Return: CX = status (0000h,0009h,000Fh) (see #02739)
            0Ah "X_QWriteC" write message to queue, if space available
                EDX = ???
                Return: CX = status (0000h,0009h,000Fh) (see #02739)
            0Bh "X_PDelay" put process to sleep for specified period
                DX = number of clock ticks to sleep???
                Return: CX = 0000h (successful)
            0Ch "X_PDispatch" force a dispatch (run scheduler)
                Return: CX = 0000h (successful)
            0Dh "F_PTerm" terminate process???
                Return: CX = status (0000h,0023h) (see #02739)
                        BX = FFFFh on error, 0000h if successful
                Note:   calls fn 04h/subfn 03h, fn 04h/subfn 1Eh,
                          fn 02h/subfn 43h, fn 02h/subfn 0Bh, fn 04h/sub 01h
            0Eh "X_PCreate" create new process
                ???
                Return: CX = status (0000h,000Ch) (see #02739)
                        EBX = ??? if successful
            0Fh "Z_PPriorSet" set process priority
                BX = ???
                DX = ??? handle or 0000h for default
                Return: CX = status (0000h,000Bh) (see #02739)
            10h "X_PHandleGet" get current process handle
                Return: CX = 0000h (successful)
                        BX = handle of default ???
                        EBX high word cleared
            11h "X_PTerm" terminate process
                DX = process handle or 0000h for current
                BX = ??? (handle???)
                Return: CX = status (0000h,000Bh,0014h) (see #02739)
            12h "F_Sleep" ???
                BX = ???
                DX = ???
                Return: CX = 0000h (successful)
            13h "F_Wakeup" ???
                DX = ???
                Return: CX = status (see #02739)
            14h "F_FindPDName" find process by name???
                BX = ???
                DX = ???
                Return: CX = status (0000h,0014h) (see #02739)
                        BX = FFFFh on error, ??? if successful
            15h "F_SetFlags" set ??? flags
                BX = ??? (low two bits only)
                DX = ??? handle or 0000h for default
                Return: CX = status (0000h,000Bh) (see #02739)
                        BX = new value of ??? flags (entire word)
                        EBX high register cleared
            16h "F_EndOfInterrupt" issue EOI to PIC
                Return: CX = 0000h (successful)
            17h "X_PTermOff" disable process termination
            18h "X_PTermOK" enable process termination
            19h "Z_FlagStatusGet" get semahprore's status
            1Ah "F_QRdMX" ???
            1Bh "F_QWrMX" ???
            1Ch "Z_FlagAlloc" allocate a new semaphore
            1Dh "Z_FlagFree" free semaphore
            1Eh "X_FlagsMaxGet" get number of semaphores supported
            1Fh "X_QReadNDC" non-destructive read from queue (peek)
            20h "Z_FlagWWTO" wait on semaphore, with timeout
            21h "F_UdaAlloc" ???
            22h "F_UdaFree" ???
            23h "X_PSuspend" suspend process
            24h "X_PUnsuspend" restart process after suspension
            25h "X_CritEnter" enter critical region
            26h "X_CritExit" leave critical region
            27h "F_PCreate" ???
            28h "Z_PHandleListGet" get list of process handles
            29h "Z_PNameGet" get process name
            2Ah "Z_PStatusGet" get process status
            2Bh "F_PDToDomain" get process' domain???
            2Ch "Z_PPriorGet" get process priority
            2Dh "F_QDList" get list of queues???
            2Eh "Z_QNameGet" get queue's name
            2Fh "X_QMsgLenGet" get message length of queue
            30h "X_QMsgMaxGet" get message capacity of queue
            31h "Z_QWriterGet" get handle of process waiting to write queue
            32h "Z_QReaderGet" get handle of process waiting to read queue
            33h "X_QMsgNumGet" get number of messages in queue
            34h "Z_QFlagsGet" get queue's flags
            35h "F_NameToQD" get queue by name???
            36h "F_NameToPD" get process by name???
            37h "X_MXCreate" create a mutex
            38h "X_MXDelete" delete a mutex
            39h "X_MXEnter" enter mutual-exclusion zone
            3Ah "X_MXEnterC" enter mutual-exclusion zone if it is free
            3Bh "X_MXExit" leave mutual-exclusion zone
            3Ch "Z_TicksSet" set length of foreground time slices
            3Dh "X_TickGet" get clock tick period
            3Eh "F_ProcessID" ???
            3Fh "X_QClose" close a queue
            40h "F_QDispose" delete queue???
            41h "F_PDToFlags" get process flags???
            42h "F_PDToDParam" ???
            43h "F_ReleaseMX" release mutex???
            44h "F_SimulateInt" ???
            45h "Z_QFlagsSet" set queue's flags
            46h "F_TickRate" ???
            47h ???
Return: CX = status (most subfunctions)
        (E)AX and/or (E)BX contain return values, depending on function
Notes:  called by DPMS.EXE and EMM386.EXE
        this API is only available if AX=12FFh/BX=0EDCh returns successfully;
          because the request is handled on the initial trap to the memory
          manager caused by INT instructions, this API must be invoked with
          an actual INT 2F instruction instead of some simulation such as a
          far call to the address in the interrupt vector table
SeeAlso: AX=12FFh/BX=0EDCh,AX=2780h/CL=01h,AX=2780h/CL=03h,AX=2780h/CL=04h
--------m-2F2780CL03-------------------------
INT 2F U - Novell DOS 7 - EMM386.EXE - MULTITASKING API - MEMORY
        AX = 2780h
        CL = 03h (module: Memory)
        CH = subfunction
            00h ???
            01h "F_PdirGet" ???
            02h "F_PdirSet" ???
            03h "Z_PageAlloc" allocate a given page of memory
            04h "F_PageAllocG" allocate global page???
            05h "F_PageAllocI" allocate instance page???
            06h "F_PtblRead" get page table???
            07h "F_PtrlWrite" select page table???
            08h "Z_PtblGet" read page table
            09h "Z_PtblSet" change page table
            0Ah "Z_PagesAlloc" allocate pages of memory
            0Bh "Z_PageFree" free a given page of memory
            0Ch "Z_MemAlloc" allocate a memory block
            0Dh "Z_MemFree" release memory block
            0Eh "Z_MemSizeGet" get size of memory block
            0Fh "Z_MemResize" resize a memory block
            10h "Z_DescAlloc" allocate a memory descriptor
            11h "Z_DescFree" release a memory descriptor
            12h "Z_DescGet" get details on memory descriptor
            13h "Z_DescSet" set a memory descriptor
            14h "Z_MemDescAlloc" allocate a memory block and its descriptor
            15h "Z_MemDescFree" release a memory block and its descriptor
            16h "Z_MemDescSizeGet" get size of memory block
            17h "Z_MemDescResize" resize a memory block
            18h "Z_PageLock" lock a page, with existing contents
            19h "Z_PageUnlock" unlock a page
            1Ah "Z_PageLockAny" lock a page, contents undefined
            1Bh "Z_PageUnlockReuse" unlock page, reuse phsyical memory
            1Ch "Z_PageLockNone" lock a page, no physical memory assigned
            1Dh "Z_PageUnlockNone" unlock a page, don't reuse physical memory
            1Eh "F_CallRealRaw" call real mode (SS:ESP supplied)
            1Fh "F_IntRealRaw" perform real-mode interrupt (SS:ESP supplied)
            20h "F_CallReal" call real mode with RETF frame
            21h "F_IntReal" perform real-mode interrupt
            22h "F_PagedCallReal" paged real-mode call
            23h "F_PagedIntReal" paged real-mode interrupt
            24h "F_CallIretReal" call real mode with IRET frame
            25h "F_CallIretRealRaw" call real mode with IRET (SS:ESP supplied)
            26h "F_CallProt16" call 16-bit protected-mode code
            27h "F_CallProt32" call 32-bit protected-mode code
            28h "F_IAddPage" add kernel instance data
            29h "Z_PageDomLock" lock page in specific domain, preserve contents
            2Ah "Z_PatgeDomUnlock" unlock page in specific domain
            2Bh "Z_PageDomLockAny" lock page in specific domain, undef contents
            2Ch "Z_PageDomUnlockReuse" unlock page in spec. domain,reuse ph.mem
            2Dh "Z_PageDomLockNone" lock page in spec. domain, no phys memory
            2Eh "Z_PageDomUnlockNone" unlock page in spec. domain, no phys. mem
            2Fh "Z_GateAlloc" allocate a gate
            30h "Z_GateFree" release a gate
            31h "X_MemFreeGet" get total free memory
            32h "X_MemTopGet" get highest memory address
            33h "X_MemTotalGet" get total memory size
            34h "F_DescRead" ???
            35h "F_DescWrite" ???
            36h "F_GetStack" ???
            37h "F_SetStack" ???
Return: CX = status (most subfunctions)
        (E)AX and/or (E)BX contain return values, depending on function
Notes:  called by DPMS.EXE and EMM386.EXE
        this API is only available if AX=12FFh/BX=0EDCh returns successfully;
          because the request is handled on the initial trap to the memory
          manager caused by INT instructions, this API must be invoked with
          an actual INT 2F instruction instead of some simulation such as a
          far call to the address in the interrupt vector table
SeeAlso: AX=12FFh/BX=0EDCh,AX=2780h/CL=01h,AX=2780h/CL=02h,AX=2780h/CL=04h
--------m-2F2780CL04-------------------------
INT 2F U - Novell DOS 7 - EMM386.EXE - MULTITASKING API - DOMAINS
        AX = 2780h
        CL = 04h (module: Domains)
        CH = subfunction
            00h "F_DAlloc" create new domain
            01h "F_DFree" delete a domain
            02h "X_DomHandleGetMy" get current domain handle
            03h "F_DSet" switch to another domain
            04h "Z_HandlerSWInt" install software-interrupt handler
            05h "Z_HandlerPageFault" install page-fault handler
            06h "Z_HandlerIOEx" install I/O exception handler
            07h "Z_HandlerGenEx" install general exception handler
            08h "Z_HandlerHWInt" install hardware interrupt handler
            09h "Z_IOBitmapGet" get current domain's I/O bitmap entry
            0Ah "Z_IOBitmapSet" set current domain's I/O bitmap entry
            0Bh "Z_IOBitmapDomGet" get domain's I/O bitmap entry
            0Ch "Z_IOBitmapDomSet" set domain's I/O bitmap entry
            0Dh "Z_DomMemRead" read memory in another domain
            0Eh "Z_DomMemWrite" write memory in another domain
            0Fh "Z_PtblDomGet" read domain's page table
            10h "Z_PtblDomSet" write domain's page table
            11h "Z_InstanceSet" register instanced memory
            12h "X_DomNProcessesGet" get number of processes in domain
            13h "X_DomSuspend" suspend a domain
            14h "Z_DomUnsuspend" resume execution of a domain
            15h "Z_DomFork" make a copy of the current domain
            16h "Z_DomTerm" terminate domain and all processes in it
            17h "Z_HandlerUnlink" remove a handler
            18h "Z_HandlerHWIntDflt" install default hardware interrupt handler
            19h "Z_HandlerVHWInt" install virtual hardware interrupt handler
            1Ah "Z_HandlerVHWIntDflt" install default virtual hware int handler
            1Bh "Z_HandlerSwapIn" install swap-in handler
            1Ch "Z_HandlerSwapOut" install swap-out handler
            1Dh "Z_EndOfInterrupt" signal EOI
            1Eh ???
            1Fh "Z_HandlerPCreate" install process-creation handler
            20h "Z_HandlerPTerm" install process-termination handler
            21h "Z_DomRootProcessGet" get domain's root process' handle
            22h "F_DForeground" domain has just switched to foreground
            23h "F_DBackground" domain has just switched to background
            24h "F_MapHMA" map domain's HMA
            25h "F_AddInstData" add DOS instance data
            26h "X_DomMemFreeGet" get free memory in a domain
            27h "X_DomMemUsedGet" get memory used by current domain
            28h "Z_DomMemMaxGet" get per-domain memory limit
            29h "Z_DomMemMaxSet" set per-domain memory limit
            2Ah "F_ReflectInt21" protected-mode INT 21 support
            2Bh "Z_DomHandleGet" get domain for a process
            2Ch ???
            2Dh ???
            2Eh ???
            2Fh ???
            30h ???
            31h ???
            32h ???
Return: CX = status (most subfunctions)
        (E)AX and/or (E)BX contain return values, depending on function
Notes:  called by DPMS.EXE and EMM386.EXE
        this API is only available if AX=12FFh/BX=0EDCh returns successfully;
          because the request is handled on the initial trap to the memory
          manager caused by INT instructions, this API must be invoked with
          an actual INT 2F instruction instead of some simulation such as a
          far call to the address in the interrupt vector table
SeeAlso: AX=12FFh/BX=0EDCh,AX=2780h/CL=01h,AX=2780h/CL=02h,AX=2780h/CL=03h
--------m-2F2780CL05-------------------------
INT 2F U - Novell DOS 7 - EMM386.EXE - MULTITASKING API - VIRTUAL MACHINES
        AX = 2780h
        CL = 05h (module: VM)
        CH = function
            00h "F_VMProtInit" internal protected-mode initialization
            01h "Z_TMLoad" load task manager
            02h "Z_TMUnload" unload task manager
            03h "Z_VMBackSet" send virtual machine to background
            04h "Z_VMForeSet" send virtual machine to foreground
            05h "Z_VMSaveEnable" enable saving virtual machine
            06h "Z-VMSaveDisable" disable saving virtual machine
            07h "Z_TMInit" intialize task manager
            08h "Z_TMHotKeyGet" get task manager hotkey
            09h "Z_TMHitKeyEnable" restart scanning for task manager key
            0Ah "Z_TMHotKeyDisable" stop scanning for task manager key
            0Bh "X_ForeGet" get current foreground domain
            0Ch "F_DMAHandlerEnable" (re)enable DMA address translation
            0Dh "F_DMAHandlerDisable" disable DMA address translation
            0Eh "Z_SerialTimeoutGet" set serial port timeout
            0Fh "Z_ParallelTimeoutSet" set parallel port timeout
            10h "F_VCPIEntry" domain is entering VCPI mode
            11h "F_VCPIExit" domain is leaving VCPI mode
            12h "X_MsgGlobalEnter" enter Global Message Mode
            13h "X_MsgGlobalDisplay" display global message
            14h "X_MsgGlobalExit" leave Global Message Mode
            15h "X_MsgDomEnter" enter Domain Message Mode
            16h "X_MsgDomDisplay" display domain-specific message
            17h "X_MsgDomExit" leave Domain Message Mode
            18h "X_MsgFatalDisplay" display fatal error message
            19h "Z_SerialBaseSet" set serial port address
            1Ah "Z_ParallelBaseSet" set parallel port address
            1Bh "Z_SerialIRQSet" set serial port IRQ
            1Ch "Z_ParallelIRQSet" set parallel port IRQ
            1Dh "F_ResetVideo" emergency video system reset
            1Eh "F_SetMouseIRQ" set which IRQ is used by mouse
            1Fh "F_CheckNotIdle" check whether system is idle
            20h "F_GetMouseInfo"
            21h "Z_SerialOwnerGet" get serial port owner
            22h "Z_SerialTimeoutGet" get serial port timeout
            23h "Z_ParallelOwnerGet" get parallel port owner
            24h "Z_ParallelTimeoutGet" get parallel port timeout
        ???
Return: ???
Notes:  called by DPMS.EXE and EMM386.EXE
        the handler for this function may be set by one of the subfunctions
          of AX=2780h/CL=01h; the default handler returns AX=BX=FFFFh and
          CX=0001h (see #02739)
        this API is only available if AX=12FFh/BX=0EDCh returns successfully;
          because the request is handled on the initial trap to the memory
          manager caused by INT instructions, this API must be invoked with
          an actual INT 2F instruction instead of some simulation such as a
          far call to the address in the interrupt vector table
SeeAlso: AX=12FFh/BX=0EDCh,AX=2780h/CL=01h,AX=2780h/CL=02h,AX=2780h/CL=03h
--------m-2F2780CL06-------------------------
INT 2F U - Novell DOS 7 - EMM386.EXE - MULTITASKING API - DPMI SERVICES
        AX = 2780h
        CL = 06h
        CH = function
            00h "F_InitDPMI" used for internal initialization
            01h "F_DescAllocLDT" allocate LDT descriptor
            02h "F_DescFreeLDT" free LDT descriptor
            03h "F_DescGetLDT" get details on LDT descriptor
            04h "F_DescSetLDT" set up LDT descriptor
            05h "F_DescAllocInt21" allocate descriptor for PM INT 21
            06h "F_WhereIsDPMI" get address of DPMI global data
Return: ???
Notes:  called by DPMS.EXE and EMM386.EXE
        the handler for this function may be set by one of the subfunctions
          of AX=2780h/CL=01h; the default handler returns AX=BX=FFFFh and
          CX=0001h (see #02739)
        this API is only available if AX=12FFh/BX=0EDCh returns successfully;
          because the request is handled on the initial trap to the memory
          manager caused by INT instructions, this API must be invoked with
          an actual INT 2F instruction instead of some simulation such as a
          far call to the address in the interrupt vector table
SeeAlso: AX=12FFh/BX=0EDCh,AX=2780h/CL=01h,AX=2780h/CL=02h,AX=2780h/CL=03h
--------m-2F2780-----------------------------
INT 2F U - Novell DOS 7 - EMM386.EXE - MULTITASKING API - AVAILABLE FOR APPS
        AX = 2780h
        CL = function (07h-0Fh)
        ???
Return: ???
Notes:  called by DPMS.EXE and EMM386.EXE
        the handlers for each of these functions may be set individually by
          one of the subfunctions of AX=2780h/CL=01h; the default handlers
          return with all registers unchanged
        this API is only available if AX=12FFh/BX=0EDCh returns successfully;
          because the request is handled on the initial trap to the memory
          manager caused by INT instructions, this API must be invoked with
          an actual INT 2F instruction instead of some simulation such as a
          far call to the address in the interrupt vector table
SeeAlso: AX=12FFh/BX=0EDCh,AX=2780h/CL=01h,AX=2780h/CL=02h,AX=2780h/CL=03h
--------T-2F2781-----------------------------
INT 2F U - Novell DOS 7 TaskMGR - BEGIN CRITICAL SECTION???
        AX = 2781h
Return: ???
SeeAlso: AX=2782h
--------T-2F2782-----------------------------
INT 2F U - Novell DOS 7 TaskMGR - END CRITICAL SECTION???
        AX = 2782h
Return: ???
SeeAlso: AX=2781h
--------m-2F2783-----------------------------
INT 2F U - Novell DOS 7 - EMM386.EXE - GET ???
        AX = 2783h
Return: AX = ???
        BX = ???
--------T-2F278F-----------------------------
INT 2F U - Novell DOS 7 TaskMGR - ??? API
        AX = 278Fh
        as for INT 2F/AX=2780h
Return: as for INT 2F/AX=2780h
Note:   Novell DOS 7 TaskMGR passes this call through to INT 2F/AX=2780h
          without changing any other registers
SeeAlso: AX=2780h/CL=01h,AX=2782h
--------F-2F2A-------------------------------
INT 2F - Gammafax DOS Dispatcher INTERFACE
        AH = 2Ah
Note:   details not available at this time
SeeAlso: AX=8000h"FaxBIOS",AX=C000h/BX=444Bh,AX=CB00h,AX=CBDDh,INT 66"BitFax"
--------V-2F2E00-----------------------------
INT 2F U - Novell DOS 7 - GRAFTABL - INSTALLATION CHECK
        AX = 2E00h
Return: AH = FFh if installed
Note:   this installation check does not follow the usual format of setting
          AL to FFh
SeeAlso: AX=2300h,AH=2Eh"GRAFTABL"
--------V-2F2E-------------------------------
INT 2F U - Novell DOS 7 - GRAFTABL - GET FONT TABLE
        AH = 2Eh
        AL nonzero
Return: AH = FFh if installed
            ES:BX -> graphics data (8 bytes per character from 80h to FFh)
SeeAlso: AX=2E00h,AH=23h"GRAFTABL"
--------t-2F3900-----------------------------
INT 2F - Kingswood TSR INTERFACE - COMPATIBILITY MODE
        AX = 3900h
Return: AL = status
            00h not installed
            FFh one or more TSRs using this interface is installed
                DX may be destroyed
Note:   this function is provided to that the multiplex number will appear used
          to other programs
SeeAlso: AH=39h/BL=00h
--------t-2F39--BL00-------------------------
INT 2F - Kingswood TSR INTERFACE - INSTALLATION CHECK
        AH = 39h
        BL = 00h
        AL = TSR ID number (01h-FFh, currently only 01h-1Bh used) (see #02742)
Return: AL = status
            00h not installed
            FFh installed
                DX = segment address of resident module
Note:   All of Kingswood Software's TSRs use this interface.  Usually the
          resident module is installed by allocating a block of upper memory,
          setting its owner ID to 000Ah (used by DOS), and filling the MCB name
          field with the TSR's name.
SeeAlso: #02743,AX=3900h,AH=39h/BL=01h

(Table 02742)
Values for Kingswood TSR ID number:
 01h    TSR Windows
 02h    NOBUSY
 03h    CD STACK
 04h    DISK WATCH
 05h    PUSHBP
 06h    ALIAS
 07h    KEYMACRO
 08h    SLOWDOWN
 09h    ANSIGRAB
 0Ah    TEE
 0Bh    FASTMOUS
 0Ch    EXTWILD
 0Dh    BREAKOUT
 0Eh    STOPDISK
 0Fh    MEMINIT
 10h    JANUSEXT
 11h    CAPS
 12h    ANSI
 13h    TRAPPER
 14h    EATMEM
 15h    WPJOKE
 16h    SHOWDOS
 17h    LOGINTS
 18h    BLANKVGA
 19h    SWAPEXEC
 1Ah    SHELL
 1Bh    TSRGAMES

Format of Kingswood TSR modules:
Offset  Size    Description     (Table 02743)
 00h  4 BYTEs   signature "FTSR"
 04h    WORD    segment address of this module (used to check validity)
 06h    WORD    number of words to skip (usually 0000h if no PSP present)
 08h  N WORDs   module-defined data that must be at a fixed segment offset
                (usually only a PSP if file access is required)
     5N BYTEs   interrupt list (see #02744)
        BYTE    FFh terminator

Format of Kingswood TSR interrupt list entry:
Offset  Size    Description     (Table 02744)
 00h    BYTE    interrupt number (00h-FEh)
 01h    WORD    offset within segment of DWORD pointer to previous interrupt
 03h    WORD    offset within segment of begin of interrupt handler code
--------t-2F39--BL01-------------------------
INT 2F - Kingswood TSR INTERFACE - REMOVAL CHECK
        AH = 39h
        BL = 01h
        AL = TSR ID number (01h-FFh) (see #02742)
Return: AL = status
            00h not ready to be removed
            FFh resident module may be removed by deassigning the interrupts
                  hooked by the TSR and deallocating the TSR's memory block
        AH,BX,CX,DX,ES may be destroyed
SeeAlso: AX=3900h,AH=39h/BL=00h
--------t-2F39-------------------------------
INT 2F - Kingswood TSR INTERFACE - APPLICATION-SPECIFIC FUNCTION CALLS
        AH = 39h
        BL = function number (02h-FFh)
        AL = TSR ID number (01h-FFh) (see #02742)
        CX,DX,SI,DI,DS,ES may contain parameters
        BH reserved for use by the function dispatcher
Return: as appropriate for the called function
SeeAlso: AX=3900h,AH=39h/BL=00h,AX=3901h/BL=02h
--------r-2F3901BL02-------------------------
INT 2F - Kingswood TSR Windows - OPEN WINDOW
        AX = 3901h
        BL = 02h
Return: AX = error code (0000h if successful)
        SI,DI,DS,ES preserved
Notes:  opens the next TSR window on top of any others.  Only three
          TSR windows can be opened at any one time.  The three windows
          are all 40x11 characters, partly overlapping.
SeeAlso: AH=39h/BL=00h,AX=3901h/BL=03h,AX=3901h/BL=05h,AX=3901h/BL=06h
--------r-2F3901BL03-------------------------
INT 2F - Kingswood TSR Windows - HIDE WINDOWS
        AX = 3901h
        BL = 03h
Return: AX = error code (0000h if successful)
        SI,DI,DS,ES preserved
Notes:  Hide any visible TSR windows from view.
SeeAlso: AH=39h/BL=00h,AX=3901h/BL=02h,AX=3901h/BL=05h
--------r-2F3901BL04-------------------------
INT 2F - Kingswood TSR Windows - SHOW WINDOWS
        AX = 3901h
        BL = 04h
Return: AX = error code (0000h if successful)
        SI,DI,DS,ES preserved
Notes:  Re-display all TSR windows after a HIDE WINDOWS call.
SeeAlso: AH=39h/BL=00h,AX=3901h/BL=02h,AX=3901h/BL=03h
--------r-2F3901BL05-------------------------
INT 2F - Kingswood TSR Windows - CLOSE WINDOW
        AX = 3901h
        BL = 05h
Return: AX = error code (0000h if successful)
        SI,DI,DS,ES preserved
Notes:  Close the last opened TSR window.
SeeAlso: AH=39h/BL=00h,AX=3901h/BL=02h
--------r-2F3901BL06-------------------------
INT 2F - Kingswood TSR Windows - SET WINDOW TITLE
        AX = 3901h
        BL = 06h
        DS:SI -> title string
Return: AX = error code (0000h if successful)
        SI,DI,DS,ES preserved
SeeAlso: AH=39h/BL=00h,AX=3901h/BL=02h
--------r-2F3901BL07-------------------------
INT 2F - Kingswood TSR Windows - POSITION CURSOR
        AX = 3901h
        BL = 07h
        CH = Y coordinate (0-10)
        CL = X coordinate (0-39)
Return: AX = error code (0000h if successful)
        SI,DI,DS,ES preserved
Note:   the hardware cursor is always disabled when a TSR window is opened;
          this call only sets a text position
SeeAlso: AH=39h/BL=00h,AX=3901h/BL=08h,AX=3901h/BL=09h
--------r-2F3901BL08-------------------------
INT 2F - Kingswood TSR Windows - DISPLAY STRING
        AX = 3901h
        BL = 08h
        DS:SI -> string
Return: AX = error code (0000h if successful)
        SI,DI,DS,ES preserved
Notes:  The text is not clipped.
        This routine understands Tab, NewLine and Carriage Return
SeeAlso: AH=39h/BL=00h,AX=3901h/BL=07h
--------r-2F3901BL09-------------------------
INT 2F - Kingswood TSR Windows - SCROLL WINDOW
        AX = 3901h
        BL = 09h
        CL = scroll direction: 01h up, FFh down, 00h clear window
Return: AX = error code (0000h if successful)
        SI,DI,DS,ES preserved
SeeAlso: AH=39h/BL=00h,AX=3901h/BL=07h
--------r-2F3901BL0A-------------------------
INT 2F - Kingswood TSR Windows - SOUND BEEPER
        AX = 3901h
        BL = 0Ah
        DX = sound divisor, or 0 for silence.
             (divide 1843200 by required frequency to get value for DX)
        CL = sound length in 18.2 Hz clock ticks
Return: AX = error code (0000h if successful)
        SI,DI,DS,ES preserved
SeeAlso: AH=39h/BL=00h
--------r-2F3901BL0B-------------------------
INT 2F - Kingswood TSR Windows - ADD OR REMOVE USER
        AX = 3901h
        BL = 0Bh
        CL = number of users increment: +1 if adding a new user
                                        -1 if removing a user
Return: AX = error code (0000h if successful)
        SI,DI,DS,ES preserved
Note:   the TSR windows resident module may only be removed when the internal
          user count is zero
SeeAlso: AH=39h/BL=00h,AX=3901h/BL=02h
--------V-2F3912BL03-------------------------
INT 2F - Kingswood ANSI display driver - SET COMPATIBILITY MODE
        AX = 3912h
        BL = 03h
        CL = new mode (00h fast, FFh BIOS)
Return: AL = old compatibility mode
        SI,DI,DS,ES preserved
SeeAlso: AX=3900h,AX=3912h/BL=04h
--------V-2F3912BL04-------------------------
INT 2F - Kingswood ANSI display driver - SET FLAGS
        AX = 3912h
        BL = 04h
        CL = new flags (see #02745)
Return: AL = old flags
        SI,DI,DS,ES preserved
SeeAlso: AX=3900h,AX=3912h/BL=03h

Bitfields for Kingswood ANSI flags:
Bit(s)  Description     (Table 02745)
 0      do not wrap at end of line
 1      wait for beeps to end before displaying next character
 2      do not use graphics cursor
--------W-2F4000-----------------------------
INT 2F - Windows 3+ (OS/2 2.x???) - GET VIRTUAL DEVICE DRIVER (VDD) CAPABILTIES
        AX = 4000h
Return: AL = video virtualization (see #02746)
Note:   this function is used by display drivers to find out what capabilities
          exist for the VDD driver and also trigger the VDD driver to call
          functions 4005h and 4006h.  This function also gives the Video Driver
          hardware access to the video registers.

(Table 02746)
Values for Windows video virtualization:
 01h    does not virtualize video access
 02h    virtualizes the video when in text mode
 03h    virtualizes the video when in text mode or single plane graphics modes
 04h    virtualizes the video when in text mode, single plane graphics modes,
          and VGA multiplane modes
 FFh    virtualizes the video fully
--------O-2F4001-----------------------------
INT 2F C - OS/2 compatibility box - SWITCHING DOS TO BACKGROUND
        AX = 4001h
Note:   called by OS/2 when the DOS box is about to be placed in the background
          and the video driver should save any necessary state
SeeAlso: AX=4002h,AX=4005h
--------O-2F4002-----------------------------
INT 2F C - OS/2 compatibility box - SWITCHING DOS TO FOREGROUND
        AX = 4002h
Note:   called by OS/2 when the DOS box is about to be placed in the foreground
          and the video driver should restore the previously-saved state
SeeAlso: AX=4001h,AX=4006h
--------W-2F4003-----------------------------
INT 2F - Windows 3.x - ENTERING VIDEO DRIVER CRITICAL SECTION
        AX = 4003h
Note:   This critical section must be exited within 1 second.
SeeAlso: AX=4004h
--------W-2F4004-----------------------------
INT 2F - Windows 3.x - EXITING VIDEO DRIVER CRITICAL SECTION
        AX = 4004h
SeeAlso: AX=4003h
--------W-2F4005-----------------------------
INT 2F C - Windows 3.x - SWITCHING DOS TO BACKGROUND
        AX = 4005h
Note:   called by Windows when the DOS box is about to be placed in the
          background and the video driver should save any necessary state
          information (this may be called only in Standard mode)
SeeAlso: AX=4001h,AX=4006h
--------W-2F4006-----------------------------
INT 2F C - Windows 3.x - SWITCHING DOS TO FOREGROUND
        AX = 4006h
Note:   called by Windows when the DOS box is about to be placed in the
          foreground and the video driver should restore any necessary state
          information (this may be called only in Standard mode)
SeeAlso: AX=4002h,AX=4005h
--------W-2F4007-----------------------------
INT 2F - Windows 3.x - ENABLE VDD TRAPPING OF VIDEO REGISTERS
        AX = 4007h
Note:   used by Windows Standard mode
--------O-2F4010-----------------------------
INT 2F - OS/2 v2.0+ - INSTALLATION CHECK / GET VERSION
        AX = 4010h
Return: AX = 4010h if OS/2 not installed
        AX = 0000h for OS/2 Warp 3.0
        BX = OS/2 version if installed
Note:   OS/2 Warp 3.0
SeeAlso: INT 21/AH=30h,INT 21/AX=3306h
--------O-2F4011-----------------------------
INT 2F - OS/2 - GET VDD API ENTRY POINT
        AX = 4011h
        DS:(E)SI -> ASCIZ name of VDD registered with VDHRegisterAPI
Return: ES:DI -> breakpoint address to call for VDD API, or 0000h:0000h
Note:   this function may be invoked from either V86 or protected mode, and
          will return the appropriate address to call for invoking the VDD
          in that mode
SeeAlso: AX=1684h"DEVICE API"
--------V-2F4021-----------------------------
INT 2F UC - Diamond Stealth64 Video - STLTH64.VXD - ???
        AX = 4021h
        ???
Return: ???
SeeAlso: AX=4022h,AX=4023h
--------V-2F4022-----------------------------
INT 2F UC - Diamond Stealth64 Video - STLTH64.VXD - ???
        AX = 4022h
        ???
Return: ???
SeeAlso: AX=4021h,AX=4023h
--------V-2F4023-----------------------------
INT 2F UC - Diamond Stealth64 Video - STLTH64.VXD - ???
        AX = 4023h
        ???
Return: ???
SeeAlso: AX=4021h,AX=4022h
--------V-2F4027-----------------------------
INT 2F UC - Diamond Stealth64 Video - DMSSTL.DRV - ???
        AX = 4027h
        ???
Return: ???
Notes:  called when ???
        a protected-mode handler for this function may be installed with the
          function RFV_HOOKINT2FHANDLER
SeeAlso: AX=4021h,AX=4022h
--------E-2F4040-----------------------------
INT 2F - PharLap 286|DOS-Extender Lite v2.5 - ???
        AX = 4040h
Return: BX:CX -> ???
--------N-2F4100-----------------------------
INT 2F - DOS Enhanced LAN Manager 2.0+ MINIPOP/NETPOPUP - INSTALLATION CHECK
        AX = 4100h
Return: CF clear if successful
            AL = FFh
        CF set on error
            AX = ???
Notes:  MINIPOP and NETPOPUP provide a network message popup service
        LAN Manager enhanced mode adds features beyond the standard redirector
          file/printer services
SeeAlso: AX=118Ah,AX=4103h,AX=4104h,AH=42h,AH=4Bh
--------N-2F4103-----------------------------
INT 2F - DOS Enhanced LAN Manager 2.0+ MINIPOP/NETPOPUP - ???
        AX = 4103h
Return: ???
SeeAlso: AX=4100h,AX=4104h
--------N-2F4104-----------------------------
INT 2F - DOS Enhanced LAN Manager 2.0+ MINIPOP/NETPOPUP - ???
        AX = 4104h
Return: ???
SeeAlso: AX=4100h,AX=4103h
--------N-2F42-------------------------------
INT 2F - LAN Manager 2.0 DOS Enhanced MSRV.EXE - MESSENGER SERVICE
        AH = 42h
        ???
Return: ???
Note:   LAN Manager enhanced mode adds features beyond the standard redirector
          file/printer services
SeeAlso: AX=118Ah,AX=4100h,AH=4Bh
--------m-2F4300-----------------------------
INT 2F - EXTENDED MEMORY SPECIFICATION (XMS) v2+ - INSTALLATION CHECK
        AX = 4300h
Return: AL = 80h XMS driver installed
        AL <> 80h no driver
Notes:  XMS gives access to extended memory and noncontiguous/nonEMS memory
          above 640K
        this installation check DOES NOT follow the format used by other
          software
SeeAlso: AX=4310h,AX=1687h,INT 67/AH=40h,@xxxxh:xxxxh"PMM"
Index:  installation check;XMS version 2+
--------m-2F4308-----------------------------
INT 2F U - HIMEM.SYS v2.77+ - GET A20 HANDLER NUMBER
        AX = 4308h
Return: AL = 43h if supported
            BL = A20 handler number (value of /MACHINE:nn switch)
            BH = AT A20 switch time (00h medium, 01h fast, 02h slow)
Note:   if the A20 handler number returned in BL is 00h, an external handler
          is being used (see AX=4330h)
SeeAlso: AX=4309h,AX=4330h
--------m-2F4309-----------------------------
INT 2F U - HIMEM.SYS v3.09+ - GET XMS HANDLE TABLE
        AX = 4309h
Return: AL = 43h if function supported
            ES:BX -> XMS handle table (see #02747)
Note:   HIMEM.SYS v3.09 is part of MS-DOS 6.0.
SeeAlso: AX=4308h

Format of XMS handle table:
Offset  Size    Description     (Table 02747)
 00h    BYTE    ??? (01h in HIMEM.SYS v3.09)
 01h    BYTE    size of one handle descriptor
 02h    WORD    number of handles (default = 20h)
 04h    DWORD   pointer to XMS handle array (see #02748)
SeeAlso: #02777

Format of XMS handle descriptor [array]:
Offset  Size    Description     (Table 02748)
 00h    BYTE    flag
                01h=free, 02h=used, 04h=in pool but not associated with any EMB
 01h    BYTE    lock count (00h=unlocked)
 02h    DWORD   address of XMS block in KB (shift left by 10 for abs. address)
 06h    DWORD   size of XMS block in KB
--------m-2F4310-----------------------------
INT 2F - EXTENDED MEMORY SPECIFICATION (XMS) v2+ - GET DRIVER ADDRESS
        AX = 4310h
Return: ES:BX -> driver entry point (see #02749,#02750,#02753,#02760,#02769,#02774)
Notes:  HIMEM.SYS v2.77 chains to previous handler if AH is not 00h or 10h
        HIMEM.SYS requires at least 256 bytes free stack space when calling
          the driver entry point
SeeAlso: AX=4300h,AX=4310h"Cloaking",AX=4310h"Netroom",AX=4310h"XMZ"

Format of XMS driver entry point:
Offset  Size    Description     (Table 02749)
 00h  5 BYTEs   jump to actual handler
                either short jump (EBh XXh) followed by three NOPs or
                  far jump (EAh XXXX:XXXX) to a program which has hooked itself
                  into the XMS driver chain
Note:   to hook into the XMS driver chain, a program should follow the chain of
          far jumps until it reaches the short jump of the driver at the end
          of the chain; this short jump is to be replaced with a far jump to
          the new handler's entry point, which should contain a short jump
          followed by three NOPs.  The new handler must return to the address
          pointed at by the short jump which was overwritten.  Using this
          method, the new handler becomes the first to see every XMS request.

(Table 02750)
Call the XMS driver "Get XMS version number" function with:
        AH = 00h
Return: AX = XMS version (in BCD, AH=major, AL=minor)
        BX = internal revision number (in BCD for HIMEM.SYS)
        DX = High Memory Area (HMA) state
            0001h HMA (1M to 1M + 64K) exists
            0000h HMA does not exist
SeeAlso: #02751,#02752,#02757,#02758,#02764

(Table 02751)
Call the XMS driver "Request High Memory Area" function with:
        AH = 01h
        DX = memory in bytes (for TSR or device drivers)
            FFFFh if application program
Return: AX = status
            0001h success
            0000h failure
                BL = error code (80h,81h,90h,91h,92h) (see #02775)
Note:   HIMEM.SYS will fail function 01h with error code 91h if AL=40h and
          DX=KB free extended memory returned by last call of function 08h
SeeAlso: #02752,#02784

(Table 02752)
Call the XMS driver "Release High Memory Area" function with:
        AH = 02h
Return: AX = status
            0001h success
            0000h failure
                BL = error code (80h,81h,90h,93h) (see #02775)
SeeAlso: #02751

(Table 02753)
Call the XMS driver "Global enable A20, for using the HMA" function with:
        AH = 03h
Return: AX = status
            0001h success
            0000h failure
                BL = error code (80h,81h,82h) (see #02775)
SeeAlso: #02754,#02755,MSR 00001000h

(Table 02754)
Call the XMS driver "Global disable A20" function with:
        AH = 04h
Return: AX = status
            0001h success
            0000h failure
                BL = error code (80h,81h,82h,94h) (see #02775)
SeeAlso: #02753,#02756,MSR 00001000h

(Table 02755)
Call the XMS driver "Local enable A20" function with:
        AH = 05h
Return: AX = status
            0001h success
            0000h failure
                BL = error code (80h,81h,82h) (see #02775)
Note:   this function is used for direct access to extended memory
SeeAlso: #02753,#02756

(Table 02756)
Call the XMS driver "Local disable A20" function with:
        AH = 06h
Return: AX = status
            0001h success
            0000h failure
                BL = error code (80h,81h,82h,94h) (see #02775)
SeeAlso: #02754,#02755

(Table 02757)
Call the XMS driver "Query A20 state" function with:
        AH = 07h
Return: AX = status
            0001h enabled
            0000h disabled
                BL = error code (00h,80h,81h) (see #02775)
SeeAlso: #02750,#02758

(Table 02758)
Call the XMS driver "Query free extended memory" function with:
        AH = 08h
        BL = 00h (some implementations leave BL unchanged on success)
Return: AX = size of largest extended memory block in KB
        DX = total extended memory in KB
        BL = error code (00h,80h,81h,A0h) (see #02775)
Note:   this function does not include the HMA in the returned memory sizes
SeeAlso: #02750,#02757,#02759,#02771

(Table 02759)
Call the XMS driver "Allocate extended memory block" function with:
        AH = 09h
        DX = Kbytes needed
Return: AX = status
            0001h success
                DX = handle for memory block
            0000h failure
                BL = error code (80h,81h,A0h) (see #02775)
SeeAlso: #02758,#02761,#02764,#02765,#02766,#02772

(Table 02760)
Call the XMS driver "Free extended memory block" function with:
        AH = 0Ah
        DX = handle of block to free
Return: AX = status
            0001h success
            0000h failure
                BL = error code (80h,81h,A2h,ABh) (see #02775)
SeeAlso: #02759,#02772

(Table 02761)
Call the XMS driver "Move extended memory block" function with:
        AH = 0Bh
        DS:SI -> EMM structure (see #02776)
Return: AX = status
            0001h success
            0000h failure
                BL = error code (80h-82h,A3h-A9h) (see #02775)
Note:   if either handle in the EMM structure is 0000h, the corresponding
          offset is considered to be an absolute segment:offset address in
          directly addressable memory
SeeAlso: #02759,#02762

(Table 02762)
Call the XMS driver "Lock extended memory block" function with:
        AH = 0Ch
        DX = handle of block to lock
Return: AX = status
            0001h success
                DX:BX = 32-bit physical address of locked block
            0000h failure
                BL = error code (80h,81h,A2h,ACh,ADh) (see #02775)
Note:   MS Windows 3.x rejects this function for handles allocated after
          Windows started
SeeAlso: #02759,#02761,#02763,#02777

(Table 02763)
Call the XMS driver "Unlock extended memory block" function with:
        AH = 0Dh
        DX = handle of block to unlock
Return: AX = status
            0001h success
            0000h failure
                BL = error code (80h,81h,A2h,AAh) (see #02775)
SeeAlso: #02762

(Table 02764)
Call the XMS driver "Get handle information" function with:
        AH = 0Eh
        DX = handle for which to get info
Return: AX = status
            0001h success
                BH = block's lock count
                BL = number of free handles left
                DX = block size in KB
            0000h failure
                BL = error code (80h,81h,A2h) (see #02775)
BUG:    MS Windows 3.10 acts as though unallocated handles are in use
Note:   MS Windows 3.00 has problems with this call
SeeAlso: #02750,#02759,#02773

(Table 02765)
Call the XMS driver "Reallocate extended memory block" function with:
        AH = 0Fh
        DX = handle of block
        BX = new size of block in KB
Return: AX = status
            0001h success
            0000h failure
                BL = error code (80h,81h,A0h-A2h,ABh) (see #02775)
SeeAlso: #02759,#02768

(Table 02766)
Call the XMS driver "Request upper memory block" function with:
        AH = 10h
        DX = size of block in paragraphs
Return: AX = status
            0001h success
                BX = segment address of UMB
                DX = actual size of block
            0000h failure
                BL = error code (80h,B0h,B1h) (see #02775)
                DX = largest available block
Notes:  Upper Memory consists of non-EMS memory between 640K and 1024K
        the XMS driver need not implement functions 10h through 12h to be
          considered compliant with the standard
        under DOS 5+, if CONFIG.SYS contains the line DOS=UMB, then no upper
          memory blocks will be available for allocation because all blocks
          have been grabbed by MS-DOS while booting
SeeAlso: #02759,#02767,#02785,INT 21/AH=58h"UMB"

(Table 02767)
Call the XMS driver "Release upper memory block" function with:
        AH = 11h
        DX = segment address of UMB to release
Return: AX = status
            0001h success
            0000h failure
                BL = error code (80h,B2h) (see #02775)
Note:   the XMS driver need not implement functions 10h through 12h to be
          considered compliant with the standard
SeeAlso: #02760,#02766,#02768

(Table 02768)
Call the XMS v3.0+ driver "Reallocate upper memory block" function with:
        AH = 12h
        DX = segment address of UMB to resize
        BX = new size of block in paragraphs
Return: AX = status
            0001h success
            0000h failure
                BL = error code (80h,B0h,B2h) (see #02775)
                DX = maximum available size (RM386)
Note:   the XMS driver need not implement functions 10h through 12h to be
          considered compliant with the standard
SeeAlso: #02765,#02766,#02767,#02783

(Table 02769)
Call the QEMM v5.11 "???" function with:
        AH = 34h  (QEMM 5.11 only, undocumented)
        ???
Return: ???
SeeAlso: #02770

(Table 02770)
Call the QEMM v5.11 "???" function with:
        AH = 44h  (QEMM 5.11 only, undocumented)
        ???
Return: ???
SeeAlso: #02769,#02783

(Table 02771)
Call the XMS v3.0 driver "Query free extended memory" function with:
        AH = 88h
Return: EAX = largest block of extended memory, in KB
        BL = status (00h,80h,81h,A0h) (see #02775)
        ECX = physical address of highest byte of memory
            (valid even on error codes 81h and A0h)
        EDX = total Kbytes of extended memory (0 if status A0h)
BUG:    HIMEM v3.03-3.07 crash on an 80286 machine if any of the 8Xh functions
          are called
SeeAlso: #02758,#02772

(Table 02772)
Call the XMS v3.0 driver "Allocate any extended memory" function with:
        AH = 89h
        EDX = Kbytes needed
Return: AX = status
            0001h success
                DX = handle for allocated block (free with AH=0Ah) (see #02760)
            0000h failure
                BL = status (80h,81h,A0h,A1h,A2h) (see #02775)
SeeAlso: #02759,#02771

(Table 02773)
Call the XMS v3.0 driver "Get extended EMB handle information" function with:
        AH = 8Eh
        DX = handle
Return: AX = status
            0001h success
                BH = block's lock count
                CX = number of free handles left
                EDX = block size in KB
            0000h failure
                BL = status (80h,81h,A2h) (see #02775)
BUG:    MS-DOS 6.0 HIMEM.SYS leaves CX unchanged
SeeAlso: #02764,#02772,#02774

(Table 02774)
Call the XMS v3.0 driver "Reallocate any extended memory block" function with:
        AH = 8Fh
        DX = unlocked memory block handle
        EBX = new size in KB
Return: AX = status
            0001h success
            0000h failure
                BL = status (80h,81h,A0h-A2h,ABh) (see #02775)
BUG:    HIMEM v3.03-3.07 crash on an 80286 machine if any of the 8Xh functions
          are called
SeeAlso: #02765,#02773

(Table 02775)
Values for XMS error code returned in BL:
 00h    successful
 80h    function not implemented
 81h    Vdisk was detected
 82h    an A20 error occurred
 8Eh    a general driver error
 8Fh    unrecoverable driver error
 90h    HMA does not exist or is not managed by XMS provider
 91h    HMA is already in use
 92h    DX is less than the /HMAMIN= parameter
 93h    HMA is not allocated
 94h    A20 line still enabled
 A0h    all extended memory is allocated
 A1h    all available extended memory handles are allocated
 A2h    invalid handle
 A3h    source handle is invalid
 A4h    source offset is invalid
 A5h    destination handle is invalid
 A6h    destination offset is invalid
 A7h    length is invalid
 A8h    move has an invalid overlap
 A9h    parity error occurred
 AAh    block is not locked
 ABh    block is locked
 ACh    block lock count overflowed
 ADh    lock failed
 B0h    only a smaller UMB is available
 B1h    no UMB's are available
 B2h    UMB segment number is invalid

Format of EMM structure:
Offset  Size    Description     (Table 02776)
 00h    DWORD   number of bytes to move (must be even)
 04h    WORD    source handle
 06h    DWORD   offset into source block
 0Ah    WORD    destination handle
 0Ch    DWORD   offset into destination block
Notes:  if source and destination overlap, only forward moves (source base
          less than destination base) are guaranteed to work properly
        if either handle is zero, the corresponding offset is interpreted
          as a real-mode address referring to memory directly addressable
          by the processor

Format of XMS handle info [array]:
Offset  Size    Description     (Table 02777)
 00h    BYTE    handle
 01h    BYTE    lock count
 02h    DWORD   handle size
 06h    DWORD   handle physical address (only valid if lock count nonzero)
SeeAlso: #02747,#02762
--------m-2F4310-----------------------------
INT 2F - Cloaking - REAL-MODE API
        AX = 4310h
Return: ES:BX -> driver entry point (see #02749,#02778,#02779,#02780,#02781)
SeeAlso: AX=4310h"XMS"

(Table 02778)
Call the Cloaking v1.01 "Client Registration" function with:
        AH = 7Eh
        BX = subfunction
            0000h get client registration count
            0001h get client registration structures
                ES:DI -> buffer for registration structures
Return: AX = status
            0000h failed
            0001h successful
                ---subfunction 00h---
                BX = size of client structure in bytes
                CX = number of clients installed
                ---subfunction 01h---
                ES:DI buffer filled
SeeAlso: #02779,#02781,INT 2C/AX=0033h

(Table 02779)
Call the Cloaking v1.01 "Verify Cloaking Host" function with:
        AH = 7Fh
Return: AX = status
            0000h failed
            0001h (successful) if installed
                BX = version (0101h for v1.01)
                CX = flags
                    bit 0: host is VCPI-based
                DS:DX -> ASCIZ Cloaking host signature
                    "CLOAKING.EXE"0, followed by a far-call entry point to
                      uninstall host (see #02780) in Helix's CLOAKING.EXE
SeeAlso: #02778,#02781
Index:  installation check;Cloaking host|installation check;CLOAKING.EXE

(Table 02780)
Call the CLOAKING.EXE "Uninstall Host" function with:
Return: AX = 4F4Bh ('OK') if successfully uninstalled protected-mode code

(Table 02781)
Call the Cloaking "Start Protected-Mode Client" function with:
        AH = 82h
        DX = XMS handle of locked block containing protected-mode code
        CL = code size (00h 16-bit, else 32-bit)
        ESI, EDI = parameters to pass to protected-mode code
Return: AX = status
            nonzero success
            0000h failed
                BL = error code (A2h,B0h) (see #02775)
Notes:  this function calls a user initialization function at offset 0 in
          the XMS memory block (see #02782)
        supported by Helix's RM386 v6.00 and Helix's CLOAKING.EXE
SeeAlso: #02778,#02779

(Table 02782)
Values user initialization function is called with:
        EBX = physical address of block's start
        ESI = user data from function 82h call
        EDI = user data from function 82h call
        CS = code selector for XMS block at EBX (16-bit or 32-bit)
        DS = data selector for XMS block, starting at EBX
        ES = selector for V86 memory access to full real-mode 1088K
        GS = selector for full 4G flat address space
        SS:ESP -> stack provided by host
Return: via 32-bit FAR return
Note:   the initialization function may call any protected-mode Cloaking
          service; it should store the values of DS, ES, and GS for future
          reference
--------m-2F4310-----------------------------
INT 2F - Helix Netroom RM386 v6.00 - XMS EXTENSIONS
        AX = 4310h
Return: ES:BX -> driver entry point (see #02783,#02784,#02785,#02786)
Notes:  HIMEM.SYS v2.77 chains to previous handler if AH is not 00h or 10h
        HIMEM.SYS requires at least 256 bytes free stack space when calling
          the driver entry point
SeeAlso: AX=4300h,AX=4310h"XMS",AX=4310h"Cloaking"

(Table 02783)
Call the Netroom RM386 v6.00 "Reallocate upper memory block" function with:
        AH = 80h
        DX = segment address of UMB to resize
        BX = new size of block in paragraphs
Return: AX = status
            0001h success
            0000h failure
                BL = error code (80h,B0h,B2h) (see #02775)
                DX = maximum available size
Note:   this function is identical to function 12h
SeeAlso: #02768,#02784

(Table 02784)
Call the Netroom RM386 v6.00 "re-enable HMA allocation" function with:
        AH = 81h
Return: AX = 0001h (success)
SeeAlso: #02751,#02783,#02785

(Table 02785)
Call the Netroom RM386 v6.00 "Create new UMB entry" function with:
        AH = 83h
        BX = segment of high-memory block
        DX = first page of start of block
        CX = number of consecutive pages in block
        DI = start of UMB in block
Return: AX = 0001h (success)
        DI = segment of first high-DOS block
Note:   the new UMB is not linked into the high-memory chain
SeeAlso: #02766,#02784,#02786

(Table 02786)
Call the Netroom RM386 v6.00 "Get all XMS handles info" function with:
        AH = 84h
        CX = size of buffer for handle info
        ES:DI -> buffer for handle info (see #02777)
Return: AX = 0001h (success)
        DX = current number of allocated XMS handles
SeeAlso: #02785,#02771
--------m-2F4310-----------------------------
INT 2F - NEC PC-9800 - XMZ - PRIVATE API
        AX = 4310h
Return: ES:BX -> driver entry point (see #02787,#02788)
Program: XMZ is an XMS 2.x-compatible driver for the NEC PC-98 series written
          by ZOBplus Hayami and available at
          ftp:/ftp.tohoku.ac.jp/pub/msdos/Memory/xmz/
SeeAlso: AX=4300h,AX=4310h"XMS"

(Table 02787)
Call XMZ v1.02 "Get HMA Information" function with:
        AH = FFh  (XMZ only)
        AL = 01h
Return: AX = 1 on success
        DX = minimum HMA allocation size (/HMAMIN=)
        BX = actual size of HMA allocation, if in use (i.e. the value in DX
              when XMS function 1 was called)
SeeAlso: #02788

(Table 02788)
Call XMZ v1.02 "Get EMB Handle Information" function with:
        AH = FFh  (XMZ only)
        AL = 02h
Return: AX = 1 on success
        DX = number of EMB handles configured (/NUMHANDLES=)
        BX = offset in XMZ's segment of the handle table (use segment of
              entry point) (see #02789)
SeeAlso: #02787

Format of XMZ v1.02 EMB Handle structure:
Offset  Size    Description     (Table 02789)
 00h    BYTE    flag byte
                04h unused handle slot
                02h in-use handle slot
                01h handle slot that represents a free block
 01h    BYTE    lock count
 02h    WORD    block start address (1K increments)
 04h    WORD    block length (1K increments)
SeeAlso: #02788
--------m-2F4320-----------------------------
INT 2F U - HIMEM.SYS - Mach 20 SUPPORT
        AX = 4320h
        ???
Return: ???
--------m-2F4330-----------------------------
INT 2F CU - HIMEM.SYS v2.77+ - GET EXTERNAL A20 HANDLER ADDRESS
        AX = 4330h
Return: AL = 80h if external A20 handler provided
            ES:BX -> external A20 handler (see #02790)
            CL = A20 detection support
                00h handler is unable to report A20 state
                01h handler supports function 0002h to report A20 state
Note:   HIMEM.SYS calls this function to allow an external program to provide
          an A20 handler (i.e. to support a machine not supported by HIMEM
          itself)
SeeAlso: AX=4308h,AX=4310h

(Table 02790)
Call parameters for external A20 handler are:
        AX = function
            0000h disable A20
            0001h enable A20
            0002h get A20 state
Return: AX = status (functions 0000h and 0001h)
            0000h failure
            0001h successful
        AX = A20 state (function 0002h)
            0000h disabled
            0001h enabled
Note:   HIMEM.SYS only calls function 0002h if the returned CL indicated that
          the handler supports the call
----------2F43D6-----------------------------
INT 2F - Multiplex - ???
        AX = 43D6h
Note:   Central Point's CPBACKUP v9 calls this function with CX=07FFh and
          DX=80D3h at startup
--------E-2F43E0BX0000-----------------------
INT 2F - DOS Protected Mode Services (DPMS) v1.0 - INSTALLATION CHECK
        AX = 43E0h
        BX = 0000h
        CX = 4450h ('DP')
        DX = 4D53h ('MS')
Return: AX = 0000h if installed
            CF clear
            ES:DI -> server structure (see #02791)
            ES:BX -> registration structure (pre-NWDOS 7 beta spec) (see #02793)
Note:   the DPMS 1.0 server included with the original release of Novell DOS
          7.0 supports both the beta and 1.0 specification, setting ES:BX even
          if CX and DX are not as specified on entry (since the beta
          specification did not use those registers).  However, the DPMS 1.1
          server included with the March 1994 update does not support the beta
          specification
SeeAlso: AX=43E1h,AX=43E2h,AX=43E3h,INT 2F/AX=1687h
Index:  signature strings;DPMS

Format of DPMS 1.0 server structure:
Offset  Size    Description     (Table 02791)
 00h  4 BYTEs   signature string "DPMS"
 04h  2 BYTEs   DPMS version (major,minor)
 06h  8 BYTEs   blank-padded server OEM name
 0Eh  2 BYTEs   OEM server version (major,minor)
 10h    WORD    DPMS flags (see #02792)
 12h    BYTE    CPU type
                (02h = 286, 03h = 386 or higher, higher values allowed)

Bitfields for DPMS flags:
Bit(s)  Description     (Table 02792)
 0      fast processor reset available (286 only)
 1      DPMS server is enabled
 2      memory is remapped
 3-15   reserved (undefined)

Format of beta DPMS registration structure:
Offset  Size    Description     (Table 02793)
 00h    DWORD   real-mode API entry point (see #02795)
 04h    DWORD   16-bit protected-mode API entry point (see #02795)
 08h  8 BYTEs   reserved (0)
 10h  8 BYTEs   blank-padded server OEM name
 18h    WORD    flags
                bit 0: fast processor reset available (286 only)
                bits 1-15 reserved (undefined)
 1Ah  2 BYTEs   DPMS version (major,minor)
 1Ch    BYTE    CPU type (02h = 286, 03h = 386 or higher)
--------m-2F43E1-----------------------------
INT 2F - DOS Protected Mode Services (DPMS) v1.0 - REGISTER CLIENT
        AX = 43E1h
        CX = required protected-mode stack size in bytes
        ES:DI -> DPMS client interface structure (see #02794)
Return: AX = 0000h if supported
           CF clear
           ES:DI buffer filled with API entry point code from offset 0Ah
Note:   the client is allowed to copy the returned API code to any location in
          memory, and need not keep the three code fields together
SeeAlso: AX=43E0h,AX=43E2h,AX=43E3h

Format of DPMS client interface structure:
Offset  Size    Description     (Table 02794)
 00h    WORD    0000h (structure version / flags)
 02h  8 BYTEs   blank-padded client name
 0Ah  7 BYTEs   real/virtual-86 mode API code (see #02795)
 11h    BYTE    space for return instruction
                set to C3h for near return, CBh for far return
 12h  7 BYTEs   16-bit protected-mode API code (see #02795)
 19h    BYTE    space for return instruction
                set to C3h for near return, CBh for far return
 1Ah  9 BYTEs   32-bit protected-mode API code (see #02795)
 23h    BYTE    space for return instruction
                set to C3h for near return, CBh for far return
Note:   the DPMS server fills the return opcode bytes with zeros and DPMS
          requests will thus crash the system unless the application
          explicitly sets them (some early versions set them to C3h by
          default, but one should not rely on that)

(Table 02795)
Call DPMS entry point with:
        AX = 0000h unregister client from server
 ---control transfer functions---
        AX = 0100h call protected-mode procedure
                CX = number of words of stack to copy
                ES:(E)DI -> callup/down register structure (see #02797)
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
        AX = 0101h call real-mode procedure (RETF return)
                CX = number of words of stack to copy
                ES:(E)DI -> callup/down register structure (see #02797)
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
        AX = 0102h call real-mode procedure (IRET return)
                CX = number of words of stack to copy
                ES:(E)DI -> callup/down register structure (see #02797)
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
        AX = 0103h call real-mode interrupt handler
                BL = interrupt number
                CX = number of words of stack to copy
                ES:(E)DI -> callup/down register structure (see #02797)
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
        AX = 0104h register default protected mode procedure
                ES:(E)DI -> default register structure (see #02798)
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
        AX = 0105h register default real-mode procedure (RETF return)
                ES:(E)DI -> default register structure (see #02798)
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
                Note:   the procedure will be called from 16-bit prot. mode
        AX = 0106h register default real-mode procedure (IRET return)
                ES:(E)DI -> default register structure (see #02798)
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
                Note:   the procedure will be called from 16-bit prot. mode
        AX = 0107h register default real-mode interrupt handler
                BL = interrupt number
                ES:(E)DI -> default register structure (see #02798)
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
                Note:   the handler will be called from 16-bit protected mode
        AX = 0108h register default real-mode procedure (RETF return)
                ES:(E)DI -> default register structure (see #02798)
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
                Note:   the procedure will be called from 32-bit prot. mode
        AX = 0109h register default real-mode procedure (IRET return)
                ES:(E)DI -> default register structure (see #02798)
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
                Note:   the procedure will be called from 32-bit prot. mode
        AX = 010Ah register default real-mode interrupt handler
                BL = interrupt number
                ES:(E)DI -> default register structure (see #02798)
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
                Note:   the handler will be called from 32-bit protected mode
 ---descriptor management---
        AX = 0200h allocate descriptors
                CX = number of descriptors to allocate
                Return: CF clear if successful
                            AX = selector for first descriptor allocated
                        CF set on error
                            AX = error code (see #02796)
        AX = 0201h free a descriptor
                BX = selector for descriptor
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
        AX = 0202h create alias descriptor
                BX = selector for descriptor to be aliased
                Return: CF clear if successful
                            AX = alias descriptor
                        CF set on error
                            AX = error code (see #02796)
        AX = 0203h build alias to real-mode segment
                BX = descriptor
                CX = real-mode segment
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
        AX = 0204h set descriptor base
                BX = descriptor
                CX:DX = base address
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
        AX = 0205h set descriptor limit
                BX = descriptor
                CX = limit
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
        AX = 0206h set descriptor type/attribute
                BX = descriptor
                CL = type
                CH = attribute
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
        AX = 0207h get descriptor base
                BX = descriptor
                Return: CF clear if successful
                            CX:DX = base address
                        CF set on error
                            AX = error code (see #02796)
 ---linear memory functions---
        AX = 0300h get size of largest free block of memory
                Return: CF clear if successful
                            BX:CX = size
                        CF set on error
                            AX = error code (see #02796)
        AX = 0301h allocate block of extended memory
                BX:CX = required size
                Return: CF clear if successful
                            BX:CX = base address
                            SI:DI = handle
                        CF set on error
                            AX = error code (see #02796)
        AX = 0302h free block of extended memory
                SI:DI = handle
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
        AX = 0303h map linear memory
                ES:(E)DI -> DDS (see #02799)
                Return: CF clear if successful
                            BX:CX = base address
                            SI:DI = handle
                        CF set on error
                            AX = error code (see #02796)
        AX = 0304h unmap linear memory
                SI:DI = handle
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
        AX = 0305h get page table entries
                ESI = linear address
                (E)CX = count
                ES:(E)DI -> buffer for page table entries
                Return: CF clear if successful
                            ES:(E)DI buffer filled
                        CF set on error
                            AX = error code (see #02796)
        AX = 0306h set page table entries
                EBX = linear memory handle
                ESI = linear address
                (E)CX = count
                ES:(E)DI -> buffer containing page table entries
                Return: CF clear if successful
                        CF set on error
                            AX = error code (see #02796)
        AX = 0307h get largest mappable block size
                Return: CF clear if successful
                            BX:CX = size
                        CF set on error
                            AX = error code (see #02796)
 ---miscellaneous---
        AX = 0400h relocate segment to extended memory
                ES:SI = base address
                CX = limit
                BL = type
                BH = attribute
                DX = selector or 0000h
                Return: CF clear if successful
                            AX = selector
                            BX:CX = new base address
                            SI:DI = handle
                        CF set on error
                            AX = error code (see #02796)
Note:   the beta DPMS specification, which is still supported by the Novell
          DOS 7.0 DPMS host, only supported functions 0100h-0103h, 0200h-0207h,
          0300h-0304h, and 0400h

(Table 02796)
Values for DPMS error code:
 8000h  general error
 8001h  unsupported function
 8002h  unable to switch to protected mode
 8004h  no default stack defined
 8005h  unknown client
 8010h  resource unavailable
 8011h  descriptor unavailable
 8012h  linear memory unavailable
 8013h  physical memory unavailable
 8021h  invalid value
 8022h  invalid selector
 8023h  invalid handle
 8025h  invalid linear address

Format of DPMS callup/down register structure:
Offset  Size    Description     (Table 02797)
 00h    DWORD   EDI
 04h    DWORD   ESI
 08h    DWORD   EBP
 0Ch  4 BYTEs   reserved (0) (ESP, may be used by DPMS server)
 10h    DWORD   EBX
 14h    DWORD   EDX
 18h    DWORD   ECX
 20h    DWORD   EAX
 24h    DWORD   EIP
 28h    WORD    CS
 2Ah  2 BYTEs   reserved (0)
 2Ch    DWORD   EFLAGS
 30h    DWORD   ESP
 34h    WORD    SS
 36h  2 BYTEs   reserved (0)
 38h    WORD    ES
 3Ah  2 BYTEs   reserved (0)
 3Ch    WORD    DS
 3Eh  2 BYTEs   reserved (0)
 40h    WORD    FS
 42h  2 BYTEs   reserved (0)
 44h    WORD    GS
 46h  2 BYTEs   reserved (0)

Format of DPMS default register structure:
Offset  Size    Description     (Table 02798)
 00h    DWORD   EIP
 04h    WORD    CS
 06h  2 BYTEs   reserved (0)
 08h    WORD    number of words to copy from stack to stack
 0Ah    BYTE    (call) 00h
                (ret) nonzero if call could not be made
 0Bh    BYTE    reserved (may be used by some servers)
 0Ch    DWORD   ESP
 10h    WORD    SS
 12h  2 BYTEs   reserved (0)
 14h    WORD    ES
 16h  2 BYTEs   reserved (0)
 18h    WORD    DS
 1Ah  2 BYTEs   reserved (0)
 1Ch    WORD    FS
 1Eh  2 BYTEs   reserved (0)
 20h    WORD    GS
 22h  2 BYTEs   reserved (0)
 24h  9 BYTEs   API entry code (filled in by server)

Format of DPMS lock DDS:
Offset  Size    Description     (Table 02799)
 00h    DWORD   total size in bytes
 04h    DWORD   offset
 08h    WORD    segment or selector
 0Ah    WORD    reserved
 0Ch    WORD    maximum number of physical blocks structure has space for
 0Eh    WORD    number of physical blocks listed
 10h    DWORD   physical address of first block
 14h    DWORD   size in bytes of first block
        ...
--------m-2F43E2-----------------------------
INT 2F - DOS Protected Mode Services (DPMS) v1.0 - ENABLE/DISABLE DPMS
        AX = 43E2h
        BX = new state (0000h disable, 0001h enable)
Return: AX = 0000h if supported
Note:   this function should normally be called only by system software
SeeAlso: AX=43E0h,AX=43E1h,AX=43E3h
--------m-2F43E3BX0000-----------------------
INT 2F C - DOS Protected Mode Services (DPMS) v1.0 - DPMS STARTUP BROADCAST
        AX = 43E3h
        BX = 0000h
        CX = 4450h ('DP')
        DX = 4D53h ('MS')
        ES:DI -> DPMS server structure (see #02791)
Return: BX = status
            bit 0 set if server is not allowed to load (e.g. some resident
                  program is incompatible)
Note:   this callout is made while the potential server is running as a normal
          real-mode DOS program, so there are no BIOS/DOS re-entrancy issues
SeeAlso: AX=43E0h,AX=43E4h
--------m-2F43E4BX0000-----------------------
INT 2F C - DOS Protected Mode Services (DPMS) v1.0 - DPMS EXIT BROADCAST
        AX = 43E4h
        BX = 0000h
        CX = 4450h ('DP')
        DX = 4D53h ('MS')
Return: BX = status
            bit 0 set if server is not allowed to unload
Note:   servers never unload until all clients unregister
SeeAlso: AX=43E0h,AX=43E3h
--------E-2F44-------------------------------
INT 2F U - DOS Extender support???
        AH = 44h
        AL = function (at least 0Bh, 15h, 17h)
        ???
Return: ???
Note:   called by Codeview for Windows
SeeAlso: AH=86h
--------G-2F4500-----------------------------
INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - INSTALLATION CHECK
        AX = 4500h
Return: AL = installation status
            01h if PROF.COM installed
            02h if VPROD.386 installed
SeeAlso: AX=4501h,AX=4502h
--------G-2F4501-----------------------------
INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - SETUP PROFILER
        AX = 4501h
        BX = CSIPS buffer size in KB (first parameter for ProfSetup)
        CX = output limit in KB (second parameter for ProfSetup)
Note:   this call is not supported by PROF.COM
SeeAlso: AX=4502h,AX=4503h
--------G-2F4502-----------------------------
INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - SET SAMPLING RATE
        AX = 4502h
        BL = sampling rate for PROF.COM (0 < BL <= 13)
            (01h = 8192/s, 04h = 1024/s, 08h = 32/s, 0Dh = 1/s)
        CX = sampling rate for VPROD.386
Note:   for PROF.COM, this programs the CMOS clock by setting BL+2 as the
          low four bits of CMOS register 0Ah.  The interruption rate is
          1 SHL (15 - BL) per second.
SeeAlso: AX=4501h,AX=4503h
--------G-2F4503-----------------------------
INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - START PROFILING
        AX = 4503h
Notes:  Profiling is also turned on by the key combinations
          LeftShift + RightShift + Alt and LeftShift + RightShift + Ctrl
        for PROF.COM, this call programs the CMOS clock by reading register
          0Ch, and setting bit 6 of register 0Bh.  It then makes sure that IRQ8
          is unmasked
SeeAlso: AX=4504h
--------G-2F4504-----------------------------
INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - STOP PROFILING
        AX = 4504h
Notes:  profiling is also turned off by the key combination
          LeftShift + RightShift
        for PROF.COM, this programs the CMOS clock by reading register 0Ch
          and clearing bit 6 of register 0Bh.  It then masks IRQ8.
SeeAlso: AX=4503h,AX=4505h,AX=4506h,AX=4507h
--------G-2F4505-----------------------------
INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - CLEAR PROFILING DATA
        AX = 4505h
SeeAlso: AX=4503h,AX=4504h,AX=4506h
--------G-2F4506-----------------------------
INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - "ProfFlush"
        AX = 4506h
SeeAlso: AX=4505h,AX=4507h
--------G-2F4507-----------------------------
INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - "ProfFinish"
        AX = 4507h
Note:   this call is essentially a "ProfStop" (AX=4504h) followed by
          "ProfFlush" (AX=4506h)
SeeAlso: AX=4504h,AX=4505h,AX=4506h
--------G-2F4508-----------------------------
INT 2F U - Microsoft Profiler (PROF.COM/VPROD.386) - ALTERNATE SEGDEBUG IFACE
        AX = 4508h
        BX = ordinal (or 0000h)
        CX = segment
        DX = instance (or 0000h)
        SI = type (or 0000h)
        ES:DI -> ASCIZ module name
Notes:  this call is an alternate entry to the profiler's SEGDEBUG
          interface, but only to function 0, for notifying the profiler of
          each new segment loaded.  The SHOWHITS utility then examines the
          profiler's output files (CSIPS.DAT and SEGENTRY.DAT) in conjunction
          with symbol files to provide information in a useful form.
        this call does not have a corresponding Windows function
SeeAlso: AX=4500h
--------D-2F4601-----------------------------
INT 2F CU - MS Windows WINOLDAP - SWITCHING ???
        AX = 4601h
Return: ???
Note:   the DOS 5+ kernel intercepts this function and copies the MCB
           following the caller's PSP memory block into the DOS data segment;
           in conjunction with AX=4602h, this intercept is used by DOS to
           avoid corruption of the Windows real-mode heap's end sentinel
SeeAlso: AX=1700h,AX=4602h
--------D-2F4602-----------------------------
INT 2F CU - MS Windows WINOLDAP - SWITCHING ???
        AX = 4602h
Return: ???
Note:   the DOS 5+ kernel intercepts this function and copies the
          previously-saved MCB from the DOS data segment into the MCB following
          the caller's PSP memory block; in conjunction with AX=4601h, this
          intercept is used by DOS to avoid corruption of the Windows real-mode
          heap's end sentinel
SeeAlso: AX=1700h,AX=4601h
--------E-2F46-------------------------------
INT 2F U - Windows/286 DOS Extender
        AH = 46h
        AL = subfunction (03h,04h)
Return: ???
Note:   these two subfunctions are called by MS Windows 3.0
--------v-2F4653CX0002-----------------------
INT 2F - F-PROT v1.x only - F-LOCK.EXE - API
        AX = 4653h ('FS')
        CX = 0002h
        BX = subfunction
            0000h  installation check
                Return: AX = FFFFh
            0001h  uninstall
                Return: AX,BX,ES destroyed
            0002h  disable (v1.08 and below only)
            0003h  enable (v1.08 and below only)
Program: F-LOCK is part of the shareware F-PROT virus/trojan protection
          package by Fridrik Skulason
SeeAlso: AX=4653h/CX=0003h,AX=CA00h,INT 21/AX=4BEEh
Index:  installation check;F-LOCK|uninstall;F-LOCK
--------v-2F4653CX0003-----------------------
INT 2F - F-PROT v1.x only - F-XCHK.EXE - API
        AX = 4653h ('FS')
        CX = 0003h
        BX = subfunction
            0000h  installation check
                Return: AX = FFFFh
            0001h  uninstall
                Return: AX,BX,ES destroyed
Program: F-XCHK is part of the shareware F-PROT virus/trojan protection
          package by Fridrik Skulason
SeeAlso: AX=4653h/CX=0002h,AX=4653h/CX=0004h,AX=CA00h
Index:  installation check;F-XCHK|uninstall;F-XCHK
--------v-2F4653CX0004-----------------------
INT 2F - F-PROT v1.x only - F-POPUP.EXE - API
        AX = 4653h ('FS')
        CX = 0004h
        BX = subfunction
            0000h  installation check
                Return: AX = FFFFh
            0001h  uninstall
                Return: AX,BX,ES destroyed
            0002h  disable (v1.08 and below only)
                   display message (v1.14+)
                        other registers: ???
            0003h  enable (v1.08 and below only)
                   display message (v1.14+)
                        other registers: ???
                        Return: AX = key pressed by user
Program: F-POPUP is part of the shareware F-PROT virus/trojan protection
          package by Fridrik Skulason
SeeAlso: AX=4653h/CX=0003h,AX=4653h/CX=0005h,AX=CA00h
Index:  installation check;F-POPUP|uninstall;F-POPUP
--------v-2F4653CX0005-----------------------
INT 2F - F-PROT v1.x only - F-DLOCK.EXE - API
        AX = 4653h ('FS')
        CX = 0005h
        BX = subfunction
            0000h installation check
                Return: AX = FFFFh
            0001h uninstall
                Return: AX,BX,ES destroyed
Program: F-DLOCK is part of the shareware F-PROT virus/trojan protection
          package by Fridrik Skulason
SeeAlso: AX=4653h/CX=0004h,AX=CA00h
Index:  installation check;F-DLOCK|uninstall;F-DLOCK
----------2F4653CX0007-----------------------
INT 2F - F-PROT v2.x - VIRSTOP - ENABLE/DISABLE BOOTSECTOR READ CHECKING
        AX = 4653h ('FS')
        CX = 0007h
        BL = new state of bootsector checking (01h = disabled)
Program: VIRSTOP is the resident virus-checker from Fridrik Skulason's F-PROT
          virus/trojan protection package
----------2F4653CX0008-----------------------
INT 2F - F-PROT v2.x - ???
        AX = 4653h ('FS')
        CX = 0008h
        ???
Return: ???
Note:   called by F-PROT v2.x VIRSTOP
----------2F4653CX0008-----------------------
INT 2F - F-PROT v2.x - VIRSTOP - INSTALLATION CHECK
        AX = 4653h ('FS')
        CX = 0008h
Return: AX = 5346h if installed
            BX = version???
            DS:SI -> ASCIZ name of file containing virus signatures
            DS:DI -> 80-byte buffer for ???
--------W-2F4680-----------------------------
INT 2F U - MS Windows v3.0 - INSTALLATION CHECK
        AX = 4680h
Return: AX = result
            0000h MS Windows 3.0 running in real (/R) or standard (/S) mode,
                  or DOS 5 DOSSHELL active
            nonzero  no Windows, Windows prior to 3.0, or Windows3 in enhanced
                  mode
Note:   Windows 3.1 finally provides an installation check which works in all
          modes (see AX=160Ah)
SeeAlso: AX=1600h,AX=160Ah
----------2F47-------------------------------
INT 2F U - ???
        AH = 47h
        ???
Return: ???
Note:   reportedly called by Microsoft BASIC Compiler v7.0
--------K-2F4800-----------------------------
INT 2F - DOS 5+ DOSKEY - INSTALLATION CHECK
        AX = 4800h
Return: AL = nonzero if installed
            (DOS 5.0 and 6.0 return AX=AA02h, Novell DOS 7 returns AX=EDFFh)
            ES = segment of DOSKEY resident portion
            DX = ??? (Novell DOS only; 02E6h for shipped v0.01)
Notes:  DOSKEY chains if AL is not 00h or 10h on entry
        this function is supported by Novell DOS 7 DOSKEY
SeeAlso: AX=4800h"PCED",AX=4810h
--------K-2F4800-----------------------------
INT 2F - PCED v2.1 - INSTALLATION CHECK
        AX = 4800h
Return: AX = AACDh if installed
            ES = segment of PCED kernel (PCED has multiple code segments)
Program: PCED v2.1 is a command line editor/history/macro facility by
          Cove Software.  It is the commercial version of the freeware CED.
Notes:  DOSKEY also responds to this call if installed, returning AX=AA02h.
        unlike DOSKEY, PCED does *not* chain if AL contains an
          unsupported function code.  It IRETs with all registers intact.
--------K-2F4810-----------------------------
INT 2F - DOS 5+ DOSKEY, PCED v2.1 - READ INPUT LINE FROM CONSOLE
        AX = 4810h
        DS:DX -> line buffer (see #01344 at INT 21/AH=0Ah)
Return: AX = 0000h if successful
Notes:  the first byte (length) of the buffer MUST be 80h, or MS-DOS's DOSKEY
          chains to the previous handler; PCED and Novell DOS allow sizes
          other than 80h
        if the user's input is a macro name, no text is placed in the buffer
          even though AX=0000h on return; the program must immediately issue
          this call again to retrieve the expansion of the macro.  Similarly,
          if the user enters a special parameter such as $*, this call must
          be repeated to retrieve the expansion; on the second call, DOSKEY
          overwrites the macro name on the screen with its expansion.
        unlike DOSKEY, PCED expands all macros on the first call, so it is
          not necessary to make two calls; since the buffer is not empty on
          return, DOSKEY-aware programs will not make the second call
        DOSKEY chains if AL is not 00h or 10h on entry
        this function is supported by Novell DOS 7 DOSKEY
SeeAlso: AX=4800h,INT 21/AH=0Ah
--------K-2F48C0-----------------------------
INT 2F - PCED v2.1 - PCED API
        AX = 48C0h
        DX = API function code
        other registers as required by the specified function
Return: CF clear if successful
        CF set on error
            AX = PCED error code
        other registers as appropriate for API function
Program: PCED v2.1 is a command line editor/history/macro facility by
          Cove Software.  It is the commercial version of the freeware CED.
Note:   the full API information is available from Cove Software
SeeAlso: AX=4800h"PCED",AX=48C1h,AX=48C2h,AX=48C3h
--------U-2F48C1BL00-------------------------
INT 2F - PCED/VSTACK - INSTALLATION CHECK
        AX = 48C1h
        BL = 00h
Return: AX = 0000h if installed
            BX = VSTACK resident segment
Program: VSTACK is a resident backscroll utility included as part of the PCED
          package by Cove Software
Note:   chains if BL <> 00h on entry
SeeAlso: AX=48C0h,AX=48C2h
--------U-2F48C2BL00-------------------------
INT 2F - PCED/ATTRIB - INSTALLATION CHECK
        AX = 48C2h
        BL = 00h
Return: AX = 0000h if installed
            BX = ATTRIB resident segment
Program: ATTRIB is a resident file attribute changer included as part of the
          PCED package by Cove Software
Note:   chains if BL <> 00h on entry
SeeAlso: AX=48C0h,AX=48C1h,AX=48C3h
--------K-2F48C3BL00-------------------------
INT 2F - PCED/KEYDEF - INSTALLATION CHECK
        AX = 48C3h
        BL = 00h
Return: AX = 0000h if installed
            BX = KEYDEF resident segment
Program: KEYDEF is a resident keyboard redefinition utility included as part
          of the PCED package by Cove Software
Note:   chains if BL <> 00h on entry
SeeAlso: AX=48C0h,AX=48C2h,AX=48C4h
--------U-2F48C4BL00-------------------------
INT 2F - PCED/FLIST - INSTALLATION CHECK
        AX = 48C4h
        BL = 00h
Return: AX = 0000h if installed
            BX = FLIST resident segment
Program: FLIST is a resident filelist processor included as part of the PCED
          package by Cove Software
Note:   chains if BL <> 00h on entry
SeeAlso: AX=48C0h,AX=48C3h,AX=48C5h
--------U-2F48C5BL00-------------------------
INT 2F - PCED/ASSOC - INSTALLATION CHECK
        AX = 48C5h
        BL = 00h
Return: AX = 0000h if installed
            BX = ASSOC resident segment
Program: ASSOC is a resident utility included as part of the PCED package which
          associates files with executable programs based on their extensions
Note:   chains if BL > 02h on entry
SeeAlso: AX=48C0h,AX=48C4h,AX=48C5h/BL=01h,AX=48C5h/BL=02h
--------U-2F48C5BL01-------------------------
INT 2F - PCED/ASSOC - GET VERSION
        AX = 48C5h
        BL = 01h
Return: AX = 0000h if installed
            BX = binary ASSOC version (BL = major, BH = minor)
Note:   chains if BL > 02h on entry
SeeAlso: AX=48C0h,AX=48C5h/BL=00h,AX=48C5h/BL=02h
--------U-2F48C5BL02-------------------------
INT 2F - PCED/ASSOC - ASSOCIATION TEST
        AX = 48C5h
        BL = 02h
        DS:SI -> ASCIZ filename
Return: AX = status
            0000h if filename is unknown
            0001h if there is an association defined for the file
        BX destroyed
Program: ASSOC is a resident utility included as part of the PCED package which
          associates files with executable programs based on their extensions
Note:   chains if BL > 02h on entry
SeeAlso: AX=48C0h,AX=48C5h/BL=00h,AX=48C5h/BL=01h
----------2F49-------------------------------
INT 2F U - ???
        AH = 49h
        ???
Return: ???
Note:   reportedly called by DOS 5.0 installation
--------D-2F4A00CX0000-----------------------
INT 2F CU - DOS 5+ - FLOPPY-DISK LOGICAL DRIVE CHANGE NOTIFICATION
        AX = 4A00h
        CX = 0000h
        DH = new drive number
        DL = current drive number
Return: CX = FFFFh to skip "Insert diskette for drive X:" message
Note:   called by MS-DOS 5.0+ IO.SYS just before displaying the message
          "Insert diskette for drive X:" on single-floppy systems
--------D-2F4A01-----------------------------
INT 2F - DOS 5+ - QUERY FREE HMA SPACE
        AX = 4A01h
Return: BX = number of bytes available in HMA (0000h if DOS not using HMA)
        ES:DI -> start of available HMA area (FFFFh:FFFFh if not using HMA)
Notes:  called by Windows 3.1 DOSX.EXE
        supported by Novell DOS 7
SeeAlso: AX=4310h,AX=4A02h
--------D-2F4A02-----------------------------
INT 2F - DOS 5+ - ALLOCATE HMA SPACE
        AX = 4A02h
        BX = number of bytes
Return: ES:DI -> start of allocated HMA block or FFFFh:FFFFh
        BX = number of bytes actually allocated (rounded up to next paragraph
              for DOS 5.0 and 6.0)
Notes:  this call is not valid unless DOS is loaded in the HMA (DOS=HIGH)
        called by Windows 3.1 DOSX.EXE
        supported by Novell DOS 7
SeeAlso: AX=4A01h,AX=4A03h
--------D-2F4A03-----------------------------
INT 2F U - Windows95 - DOS KERNEL - (DE)ALLOCATE HMA MEMORY BLOCK
        AX = 4A03h
        CX = segment of block's owner???
        DL = subfunction
            00h allocate block
                BX = number of bytes
                Return: DI=FFFFh if unable to allocate
                        ES:DI -> allocated block
            01h resize block
                ES:DI -> previously-allocated block
                BX = new size in bytes (must be less than original size???)
                Return: DI=FFFFh if unable to allocate
                        ES:DI -> reallocated block
                Note:   the contents of the original block are NOT copied
            02h free block???
                ES:DI -> block to be freed
Note:   in MS-DOS 7.x, function 4A02h is implemented by calling this function
          with DL=00h
SeeAlso: AX=4A02h
--------D-2F4A04-----------------------------
INT 2F U - Windows95 - DOS KERNEL - GET START OF HMA MEMORY CHAIN
        AX = 4A04h
Return: AX = 0000h if function supported
            ES:DI -> first HMA memory control block (see #02800)

Format of Windows95 HMA memory control block:
Offset  Size    Description     (Table 02800)
 00h  2 BYTEs   signature "MS" (4Dh 53h)
 02h    WORD    segment of owner (or segment at which to address block???)
                0000h = free
                0001h = DOS???
                FF33h = IO.SYS
                FFFFh = MSDOS.SYS
 04h    WORD    size of memory block (not including this header)
 06h    WORD    offset of next memory block in segment FFFFh, or 0000h if last
 08h  8 BYTEs   unused (explicitly set to 0 for MS-DOS 7.10)
--------T-2F4A05-----------------------------
INT 2F U - DOS 5+ DOSSHELL - TASK SWITCHING API???
        AX = 4A05h
        SI = function
            0000h reset???
            0001h ???
                ES:BP -> 80-byte buffer containing ???
            0002h ???
            0003h ???
            0004h ???
                BL = ???
            0005h ???
            0006h get ???
                Return: ES:SI -> ???
            0007h get ???
                Return: AX = ???
            0008h get ???
                Return: DX:AX -> ??? (internal control data of some kind)
            0009h get ???
                Return: ES:SI -> ??? (apparently identical to function 0006h)
            000Ah ???
                BL = length of buffer
                ES:BP -> buffer containing ???
            000Bh get ???
                Return: AX = ???
            000Ch ???
                BL = ???
                Return: if BL nonzero on entry
                            DX:AX -> ???
                        if BL = 00h on entry
                            ES:SI -> ???
Notes:  DOSSHELL chains to the previous handler if SI is not one of the values
          listed above
        the DOSSWAP.EXE module calls functions 03h,04h,05h,07h,08h,09h,0Ch
        the Windows 3.1 DSWAP.EXE and WSWAP.EXE task switchers use these calls
SeeAlso: AX=4B01h
--------D-2F4A06-----------------------------
INT 2F CU - DOS 5+ - DOS SUPERVISOR "REBOOT PANEL" - ADJUST MEMORY SIZE
        AX = 4A06h
        DX = segment following last byte of conventional memory
Return: DX = segment following last byte of memory available for use by DOS
Desc:   used to override the default memory size when booting diskless
          workstations
Notes:  called by MS-DOS 5+ IO.SYS startup code if the signature "RPL" is
          present three bytes beyond the INT 2F handler; this call overrides
          the value returned by INT 12
        hooked by RPL code at the top of memory to protect itself from being
          overwritten; DOS builds a memory block with owner = 0008h and name
          "RPL" which must be freed by the RPL code when it is done
SeeAlso: INT 12"BIOS",INT 18"BOOT HOOK"
--------N-2F4A07-----------------------------
INT 2F U - RESERVED FOR PROTMAN SUPPORT
        AX = 4A07h
        ???
Return: ???
--------c-2F4A10BX0000-----------------------
INT 2F - SMARTDRV v4.00+ - INSTALLATION CHECK AND HIT RATIOS
        AX = 4A10h
        BX = 0000h
        CX = EBABh (v4.1+; see Note)
Return: AX = BABEh if installed
            DX:BX = cache hits
            DI:SI = cache misses
            CX = number of dirty cache elements
            BP = version in BCD (4.10 = 0410h)
Notes:  most of the SMARTDRV API, including this call, is supported by
          PC-Cache v8.0 and recent versions of the Norton Caches
        if DBLSPACE.BIN is installed but SMARTDRV has not yet been installed,
          then calls of this function with CX<>EBABh on entry cause
          DBLSPACE.BIN to display the error message
          "Cannot run SMARTDrive 4.0 with DoubleSpace" and abort the caller
          with INT 21/AX=4C00h
        SMARTDRV v3.x had a completely different API using IOCTL calls, which
          was also supported by the Norton Caches
SeeAlso: AX=4A10h/BX=0001h,AX=4A10h/BX=0004h,AX=4A10h/BX=0005h
SeeAlso: AX=4A10h/BX=0007h,AX=4A10h/BX=1234h,AX=4A11h/BX=0000h
SeeAlso: INT 21/AX=4402h"SMARTDRV",INT 21/AX=4403h"SMARTDRV"
--------c-2F4A10BX0000-----------------------
INT 2F U - Novell NWCACHE - ???
        AX = 4A10h
        BX = 0000h
        CX = 0EDCh ('EDC' = Novell European Development Center)
Return: ???
SeeAlso: AX=4A10h/BX=0001h"NWCACHE"
--------c-2F4A10BX0001-----------------------
INT 2F - SMARTDRV v4.00+ - FLUSH BUFFERS (COMMIT CACHE)
        AX = 4A10h
        BX = 0001h
Note:   this function is also supported by PC-Cache v8.0.
SeeAlso: AX=4A10h/BX=0000h,AX=4A10h/BX=0002h,INT 21/AH=0Dh
--------c-2F4A10BX0001-----------------------
INT 2F U - Novell NWCACHE - ???
        AX = 4A10h
        BX = 0001h
        CX = 0EDCh ('EDC' = Novell European Development Center)
Return: ???
SeeAlso: AX=4A10h/BX=0000h"NWCACHE"
--------c-2F4A10BX0002-----------------------
INT 2F - SMARTDRV v4.00+ - RESET CACHE
        AX = 4A10h
        BX = 0002h
Note:   this function is also supported by PC-Cache v8.0.
SeeAlso: AX=4A10h/BX=0000h,AX=4A10h/BX=0001h
--------c-2F4A10BX0003-----------------------
INT 2F - SMARTDRV v4.00+ - STATUS
        AX = 4A10h
        BX = 0003h
        BP = drive number (0=A, 1=B, etc.)
        DL = subfunction
            00h only get information
            01h turn on read cache
            02h turn off read cache
            03h turn on write cache
            04h turn off write cache
            ---NWCACHE---
            05h ???
            06h ???
Return: AX = BABEh if OK
        DL = status (see #02801)
        DL = FFh if drive does not exist
Notes:  If the read cache is off, reads will not be cached, but writes will
          continue to be cached if the write-cache is enabled.
        this function is also supported by PC-Cache v8.0.
SeeAlso: AX=4A10h/BX=0000h

Bitfields for SMARTDRV status:
Bit(s)  Description     (Table 02801)
 7      not cached
 6      write-through (not write-cached)
 0-5    real drive number (0=A, 1=B...)
Note:   the "real" drive number is always set to 00h for RAM disks and to 3Fh
          for CD-ROMs; unfortunately, the latter means that an uncached CD-ROM
          has status FFh, just as a nonexistent drive does
--------c-2F4A10BX0004-----------------------
INT 2F - SMARTDRV v4.00+ - GET CACHE SIZE
        AX = 4A10h
        BX = 0004h
Return: AX = size in elements of full-sized cache
        BX = current size in elements
        CX = size of one element in bytes
        DX = number of elements under Windows
Note:   this function is also supported by PC-Cache v8.0.
SeeAlso: AX=4A10h/BX=0000h,AX=4A10h/BX=0003h,AX=4A10h/BX=0005h
--------c-2F4A10BX0005-----------------------
INT 2F - SMARTDRV v4.00+ - GET DOUBLE-BUFFER STATUS
        AX = 4A10h
        BX = 0005h
        BP = drive number (0=A, 1=B...)
Return: AX = BABEh if double-buffered
            ES:DI -> 16-byte array of status bytes for fixed disks (see #02802)
SeeAlso: AX=4A10h/BX=0000h,AX=4A10h/BX=0003h,AX=4A10h/BX=0006h

(Table 02802)
Values for SMARTDRV status byte:
 00h    state unknown
 FFh    drive double-buffered
 else   not double-buffered
--------c-2F4A10BX0006-----------------------
INT 2F CU - SMARTDRV v4.00+ - CHECK IF DRIVE CACHEABLE
        AX = 4A10h
        BX = 0006h
        CL = drive number (01h = A:)
Return: AX = 0006h if drive should not be cached by SMARTDRV
Note:   called by SMARTDRV at startup to determine whether it should cache
          a particular drive
SeeAlso: AX=4A10h/BX=0000h
--------c-2F4A10BX0007-----------------------
INT 2F - SMARTDRV v4.00+ - GET DEVICE DRIVER FOR DRIVE
        AX = 4A10h
        BX = 0007h
        BP = drive number (00h=A:)
Return: DL = unit number within device driver
        ES:DI -> device driver header for drive (see #01646)
Note:   this function is also supported by PC-Cache v8.0.
        this call is reported to always return the driver header of the
          standard block driver (A:-C:+) for SmartDrive v5.00 from MS-DOS 6.2
SeeAlso: AX=4A10h/BX=0000h,AX=4A11h/BX=0003h,AX=4A11h/BX=0004h
--------c-2F4A10BX0008-----------------------
INT 2F - SMARTDRV v4.20+ - GET/SET FLUSH BEFORE PROMPT, CD-ROM SUPPORT
        AX = 4A10h
        BX = 0008h
        DL = subfunction
            00h set
                DH = new states
                    bit 0: flush before prompt
                    bits 1-7 reserved (0)
            01h get
                Return: DH = status flags
                            bit 0: (v4.2+) flush before prompt
                            bit 1: (v5.0+) CD-ROM caching support installed
Note:   v4.2 was an interim release to fix problems in the SMARTDRV included
          with MS-DOS 6.00; v5.00 is included with MS-DOS 6.2
--------c-2F4A10BX000A-----------------------
INT 2F - SMARTDRV v4.00+ - GET ELEMENT STATUS TABLE
        AX = 4A10h
        BX = 000Ah
Return: ES:BX -> information pointer table (see #02803)
Note:   this function is also supported by PC-Cache v8.0.
SeeAlso: AX=4A10h/BX=0000h

Format of SMARTDRV information pointer table:
Offset  Size    Description     (Table 02803)
 00h    WORD    offset of ??? byte/word array (byte if elements < 2000h bytes)
 02h    WORD    offset of dirty flag byte/word array (byte if elts < 2000h)
                each byte/word is a bit string of the dirty sectors in element
 04h    WORD    offset of word array containing low halves of unique
                  identifiers for the corresponding element's contents
 06h    WORD    offset of word array containing high halves of unique
                  identifiers for the corresponding element's contents
 08h    WORD    offset of WORD containing current number of elements in cache
--------c-2F4A10BX1234-----------------------
INT 2F - SMARTDRV v4.00+ - SIGNAL SERIOUS ERROR
        AX = 4A10h
        BX = 1234h
Desc:   this function pops up a message box saying that a serious error
          occurred and to hit R to retry, then waits for the keypress
Note:   this function is also supported by PC-Cache v8.0.
SeeAlso: AX=4A10h/BX=0000h
--------k-2F4A11BX0000-----------------------
INT 2F - DBLSPACE.BIN - "GetVersion" - INSTALLATION CHECK
        AX = 4A11h
        BX = 0000h
Return: AX = 0000h (successful)
        BX = 444Dh ("DM")
        CL = first drive letter used by DBLSPACE (41h ['A'] = A:)
        CH = number of drive letters used by DBLSPACE
        DX = internal DBLSPACE.BIN version number (bits 14-0)
                bit 15 set if DBLSPACE.BIN has not yet been relocated to final
                  position in memory (i.e. DBLSPACE.SYS /MOVE)
Program: DBLSPACE.BIN is the resident driver for DoubleSpace, the
          disk-compression software bundled with MS-DOS 6.0 and 6.20
Notes:  this function is also supported by the version of SuperStor bundled
          with IBM DOS 6.x and "preloading" versions of Stacker
        the complete DBLSPACE.BIN API is still supported by MS-DOS 6.22's
          DRVSPACE.BIN
SeeAlso: AX=4A11h/BX=0001h,AX=4A11h/BX=0002h,AX=4A11h/BX=0003h
SeeAlso: AX=4A11h/BX=0005h,AX=4A11h/BX=0007h,AX=4A11h/BX=FFFFh
SeeAlso: INT 21/AX=4404h"DBLSPACE"
--------k-2F4A11BX0001-----------------------
INT 2F - DBLSPACE.BIN - "GetDriveMapping" - GET DRIVE MAPPING
        AX = 4A11h
        BX = 0001h
        DL = drive number (0=A:)
Return: AX = status (see also #02804)
            0000h successful
                if DL was compressed drive,
                    BL = host drive (bit 7 set if drive is compressed)
                else if DL was host drive,
                    BL = compressed drive
                else
                    BL = specified drive (if available for DoubleSpace)
                BH = DoubleSpace sequence number
            other error code (0101h) (see #02804)
                apparently never returned for the MS-DOS 6.2 DoubleSpace
Note:   the compressed volume file for the specified compressed drive is
          host:\DBLSPACE.sequence
SeeAlso: AX=4A11h/BX=0000h

(Table 02804)
Values for DBLSPACE function status:
 0000h  successful
 0100h  bad function
 0101h  invalid drive
 0102h  not a compressed drive
 0103h  drive already swapped
 0104h  drive not swapped
SeeAlso: #02806
--------k-2F4A11BX0002-----------------------
INT 2F - DBLSPACE.BIN - "Swap Drive" - SWAP DRIVE LETTERS OF CVF AND HOST DRIVE
        AX = 4A11h
        BX = 0002h
        DL = drive number (0=A:) of compressed drive to swap with its host
Return: AX = status (0000h,0101h,0102h,0103h) (see #02804)
Note:   this function is intended for use by DBLSPACE.EXE only
SeeAlso: AX=4A11h/BX=0000h
--------k-2F4A11BX0003-----------------------
INT 2F - DBLSPACE.BIN - "DSGetEntryPoints" - GET DEVICE DRIVER ENTRY POINTS
        AX = 4A11h
        BX = 0003h
        CL = drive number (0=A:) of compressed drive
Return: CL = FFh on error (not compressed drive)
        CL <> FFh driver unit number of host drive
            ES:SI -> device driver's strategy routine
            ES:DI -> device driver's interrupt routine
        BX destroyed
Note:   in conjunction with subfunction 0004h, this call allows disk caches
          like SMARTDRV to apply a device driver wrapper to DoubleSpaced
          drives just like SMARTDRV applies to regular block devices
SeeAlso: AX=4A10h/BX=0007h,AX=4A11h/BX=0000h,AX=4A11h/BX=0004h
--------k-2F4A11BX0004-----------------------
INT 2F - DBLSPACE.BIN - "DSSetEntryPoints" - SET DEVICE DRIVER ENTRY POINTS
        AX = 4A11h
        BX = 0004h
        CL = drive number (0=A:) of compressed drive
        DL = unit number for new driver entry points
        DH = 00h
        ES:SI -> device driver strategy routine to call for drive
        ES:DI -> device driver interrupt routine to call for drive
Return: CL = FFh on error (not a compressed drive)
        BX destroyed
Program: DBLSPACE.BIN is the resident driver for DoubleSpace, the
          disk-compression software bundled with MS-DOS 6.0
Note:   in conjunction with subfunction 0003h, this call allows disk caches
          like SMARTDRV to apply a device driver wrapper to DoubleSpaced
          drives just like SMARTDRV applies to regular block devices
SeeAlso: AX=4A10h/BX=0007h,AX=4A11h/BX=0000h,AX=4A11h/BX=0003h
--------k-2F4A11BX0005-----------------------
INT 2F - DBLSPACE.BIN - "ActivateDrive" - MOUNT COMPRESSED DRIVE
        AX = 4A11h
        BX = 0005h
        DL = drive number (0=A:) to assign to new drive
        ES:SI -> activation record (see #02805)
Return: status returned in activation record (see #02806)
SeeAlso: AX=4A11h/BX=0000h,AX=4A11h/BX=0006h

Format of DBLSPACE activation record:
Offset  Size    Description     (Table 02805)
 00h  2 BYTEs   signature "MD" (4Dh 44h)
 02h    BYTE    4Dh ('M') mount command
 03h    BYTE    error code (set to FFh before calling) (see #02806)
 04h    BYTE    host drive number (0=A:)
 05h    ???     DISK_UNIT structure (not documented)

(Table 02806)
Values for DBLSPACE Mount error code:
 00h    successful
 01h    drive letter not available for DoubleSpace
 02h    drive letter already in use
 03h    no more disk units (increase MaxRemovableDrives in .INI)
 09h    CVF too fragmented
SeeAlso: #02805,#02804
--------k-2F4A11BX0006-----------------------
INT 2F - DBLSPACE.BIN - "DeactivateDrive" - UNMOUNT COMPRESSED DRIVE
        AX = 4A11h
        BX = 0006h
        DL = drive number (0=A:) to unmount
Return: AX = status (0000h,0102h) (see #02804)
SeeAlso: AX=4A11h/BX=0000h,AX=4A11h/BX=0005h
--------k-2F4A11BX0007-----------------------
INT 2F - DBLSPACE.BIN - "GetDriveSpace" - GET SPACE AVAIL ON COMPRESSED DRIVE
        AX = 4A11h
        BX = 0007h
        DL = compressed drive number (0=A:)
Return: AX = status (0000h,0102h) (see also #02804)
            0000h successful
                DS:SI -> free space record (see #02807)
Program: DBLSPACE.BIN is the resident driver for DoubleSpace, the
          disk-compression software bundled with MS-DOS 6.0
SeeAlso: AX=4A11h/BX=0000h,AX=4A11h/BX=0008h

Format of DBLSPACE free space record:
Offset  Size    Description     (Table 02807)
 00h    DWORD   total number of sectors in drive's sector heap
 04h    DWORD   number of free sectors in drive's sector heap
--------k-2F4A11BX0008-----------------------
INT 2F - DBLSPACE.BIN - "GetFileFragmentSpace" - GET SIZE OF FRAGMENT HEAP
        AX = 4A11h
        BX = 0008h
        DL = compressed drive number (0=A:)
Return: AX = status (0000h,0102h) (see also #02804)
            0000h successful
                BX = maximum entries in File Fragment heap
                CX = available entries in File Fragment heap
SeeAlso: AX=4A11h/BX=0000h,AX=4A11h/BX=0007h,AX=4A11h/BX=0009h
--------k-2F4A11BX0009-----------------------
INT 2F - DBLSPACE.BIN - "GetExtraInfo" - DETERMINE NUMBER OF DISK_UNIT STRUCTS
        AX = 4A11h
        BX = 0009h
        DL = compressed drive number (0=A:)
Return: AX = status (see also #02804)
            0000h successful
                CL = number of DISK_UNIT structures allocated
                          (see AX=4A11h/BX=0005h)
                CH = DoubleGuard enabled-checks bitflags in bits 6-0 (DOS 6.2)
Note:   the DoubleGuard checks are enabled or disabled as a block by the
          DoubleGuard= line in DBLSPACE.INI; they may be individually set with
          the CheckSum= line.
SeeAlso: AX=4A11h/BX=0000h,AX=4A11h/BX=0008h
--------k-2F4A11BX000A-----------------------
INT 2F - DBLSPACE.BIN v6.2 - SET AUTOMOUNT DRIVES
        AX = 4A11h
        BX = 000Ah
        CX:DX = bitmask of drives on which to enable AutoMount
                (DX bit 0 = A:, CX bit 0 = P:, etc.)
Return: AX = 0000h if supported
            CX:DX = old mask or 0000h:0000h on error
        BX destroyed
SeeAlso: AX=4A11h/BX=000Bh
--------k-2F4A11BX000B-----------------------
INT 2F - DBLSPACE.BIN v6.2 - GET AUTOMOUNT DRIVES
        AX = 4A11h
        BX = 000Bh
Return: AX = 0000h if supported
            CX:DX = mask of drives with AutoMount enabled
                0000h:0000h on error
        BX destroyed
SeeAlso: AX=4A11h/BX=000Ah
--------k-2F4A11BXFFFE-----------------------
INT 2F U - DBLSPACE.BIN - RELOCATE
        AX = 4A11h
        BX = FFFEh
        ES = segment to which to relocate DBLSPACE.BIN
Return: ???
Notes:  called by DBLSPACE.SYS to relocate DBLSPACE.BIN to its final position
          in memory
        this function also unhooks and discards the code providing this
          function and AX=4A11h/BX=FFFFh
        this function is also supported by the version of SuperStor bundled
          with IBM DOS 6.x and "preloading" versions of Stacker
SeeAlso: AX=4A11h/BX=FFFFh
--------k-2F4A11BXFFFF-----------------------
INT 2F U - DBLSPACE.BIN - GET RELOCATION SIZE
        AX = 4A11h
        BX = FFFFh
Return: AX = number of paragraphs needed by DBLSPACE.BIN
Note:   used by DBLSPACE.SYS to relocate the DBLSPACE driver to its final
          position in memory
        this function is also supported by the version of SuperStor bundled
          with IBM DOS 6.x and "preloading" versions of Stacker
SeeAlso: AX=4A11h/BX=0000h,AX=4A11h/BX=FFFEh
--------k-2F4A12CX4D52-----------------------
INT 2F - Microsoft Realtime Compression Interface (MRCI) - RAM-BASED SERVER
        AX = 4A12h
        CX = 4D52h ("MR")
        DX = 4349h ("CI")
Return: CX = 4943h ("IC") if installed
        DX = 524Dh ("RM") if installed
            ES:DI -> MRCINFO structure (see #00725 at INT 1A/AX=B001h)
Note:   this call is functionally identical to INT 1A/AX=B001h, but should be
          called first, as the latter call is used for the first, ROM-based
          MRCI server, while this call is used for RAM-based servers which
          may be partially or entirely replacing a prior server
SeeAlso: AX=4A12h/CX=5354h,INT 1A/AX=B001h
--------k-2F4A12CX5354-----------------------
INT 2F - Stacker 4 LZS Compression Interface (LZSAPI)
        AX = 4A12h
        CX = 5354h ("ST")
        DX = 4143h ("AC")
Return: AX = 4F4Bh ("OK") if installed
        CX = 7374h ("st") if installed
        DX = 6163h ("ac") if installed
            ES:DI -> entry point in LZSAPI server (usually, driver
                      STACKER.COM) containing far address of an actual
                      LZSINFO structure (see #02808)
SeeAlso: AX=4A12h/CX=4D52h,INT 25/AX=CDCDh

Format of LZSINFO structure:
Offset  Size    Description     (Table 02808)
 00h  6 BYTEs   signature "LZSAPI"
 06h    WORD    server version (200 (0C8h) for Stacker 4 and Stacker Anywhere)
 08h  4 BYTEs   vendor signature
                "STAC" = Stac Electronics, Inc.
 0Ch  6 BYTEs   ???
 12h    WORD    bit flags: server status/capabilities (see #02809)
 14h    DWORD   -> Stacker 3.X-compatible compression procedure
 18h    DWORD   -> Stacker 3.X-compatible decompression procedure
 1Ch  4 BYTEs   reserved (always set to 0)
 20h    DWORD   -> incremental Stacker 3.x-compatible compression procedure
                  (see #02810)
 24h  4 BYTEs   ???
 28h    DWORD   -> incremental Stacker 3.x-compatible decompression procedure
                  (see #02811)
 2Ch  4 BYTES   ???
 30h    DWORD   -> new (Stacker 4) compression procedure
 34h  4 BYTEs   ???
 38h    DWORD   -> new (Stacker 4) decompression procedure
Notes:  Stacker 4 usally keeps two different data-compression algorithms in
          memory (preferably in XMA):
            1) new (Stacker 4) data compression algorithm (4K LZ77 with hashing
                  and static Huffman encoding), and
            2) old (Stacker 3.x-compatible) one (2K LZ77 with hashing), which
                  is used to work with STACVOL files created under older
                  versions of Stacker.

Bitfields for LZSAPI capabilities:
Bit(s)  Description     (Table 02809)
 0      ???
 1      busy/error flag
 2-10   ???
 11     maximum compressor/decompressor presented

(Table 02810)
Call Stacker 3.x-style non-incremental functions with:
        STACK:  DWORD   return address for compress/decompress procedure
                WORD    compression algorithm parameters (see #02812)
                WORD    size of destination buffer (in bytes)
                DWORD   address of destination buffer
                WORD    size of source buffer (in bytes)
                DWORD   address of source buffer
Return: (compression/decompression procedure)
        AX = size of resulting data in destination buffer
            0000h if error (either destination buffer too small or error in
                  compressed data)

(Table 02811)
Call Stacker 4-style incremental procedures with:
        STACK:  DWORD   return address for compr./decompr. procedure
                DWORD   address of LZSSWAP structure (see #02813)
                        if 0000:0000, procedure uses non-incremental technique
                WORD    compression algorithm parameters (see #02812)
                WORD    size of destination buffer (in bytes)
                DWORD   address of destination buffer
                WORD    size of source buffer (in bytes)
                DWORD   address of source buffer

(Table 02812)
Values for Compression algorithm parameters:
Value   Compression level (/P=xx parameter)
 07F9h    1
 0621h    2
 0625h    3
 0665h    4
 0669h    5
 06E9h    6
 06EDh    7
 07D1h    8
 07D9h    9

Format of LZSSWAP structure:
Offset  Size    Description     (Table 02813)
 00h  2 BYTEs   signature "CS"
 02h  6 BYTEs   reserved
 08h    DWORD   address of destination buffer swapping procedure
 0Ch    DWORD   address of stack swapping procedure
--------k-2F4A13-----------------------------
INT 2F U - DBLSPACE.BIN - GET ??? ENTRY POINTS
        AX = 4A13h
Return: AX = 134Ah if supported
            ES:BX -> entry point record (see #02814)
SeeAlso: AX=4A11h/BX=0000h

Format of DBLSPACE entry point record:
Offset  Size    Description     (Table 02814)
 00h    DWORD   pointer to FAR function for ???
 04h  5 BYTEs   FAR JUMP instruction to ???
----------2F4A15BX0000-----------------------
INT 2F - MS EMM386.EXE v4.46+ - INSTALL I/O VIRTUALIZATION HANDLER
        AX = 4A15h
        BX = 0000h (function number)
        DX = starting I/O address
        EDX high word = ending I/O address
        CX = number of ports to trap
        DS:SI -> I/O dispatch table (see #02815)
        DI = size of client's code and data (size of DS segment which must be
              made available to I/O dispatch function in protected mode)
Return: CF clear if successful
        CF set on error
Notes:  this interface is only available in virtual-86 mode; the I/O handlers
          will be called in protected mode
        only ports 0100h-FFFFh may be trapped; EMM386 reserved ports 0000h-
          00FFh

Format of EMM386 I/O dispatch table [array]:
Offset  Size    Description     (Table 02815)
 00h    WORD    I/O port number
 02h    WORD    offset of I/O handler for port (see #02816)

(Table 02816)
Values EMM386 I/O dispatch function is called with:
        CX = Ring0 code selector for I/O handler's segment
        DS = Ring0 data selector for I/O handler's segment (alias of CS)
        EDX = faulting I/O address
        ECX = direction (00000008h for byte output, 00000000h for byte input)
                (reportedly 00h for byte/word input, 04h for byte/word output
                  under DOS 6.22 EMM386)
        EAX = data in/out
Return: (via FAR RET)
        CF clear if I/O access successfully virtualized
        CF set if access not virtualized (default handler will be called to
              perform the I/O)
BUG:    32-bit I/O on trapped ports hangs the DOS 6.22 EMM386
SeeAlso: #02815
--------D-2F4A16-----------------------------
INT 2F U - Windows95 - OPEN BOOT LOG
        AX = 4A16h
Return: AX = status
            0000h successful
            FFFFh boot log file already open
            else  DOS error code
        BX destroyed
SeeAlso: AX=4A17h,AX=4A18h
--------D-2F4A17-----------------------------
INT 2F U - Windows95 - WRITE TO BOOT LOG
        AX = 4A17h
        CX = number of bytes to write
        DS:DX -> message to write (must include CR-LF if it is desired)
Return: AX = status
            0000h successful
            FFFFh boot log file not open
            else  DOS error code
Note:   calls the code for INT 2F/AX=4A21h after writing to the file
SeeAlso: AX=4A17h,AX=4A18h,AX=4A21h
--------D-2F4A18-----------------------------
INT 2F U - Windows95 - CLOSE BOOT LOG
        AX = 4A18h
Return: AX = status
            0000h successful
            FFFFh boot log file not open
            else  DOS error code from closing file
        BX destroyed
SeeAlso: AX=4A16h,AX=4A17h
--------D-2F4A21-----------------------------
INT 2F U - Windows95 - ???
        AX = 4A21h
Return: AX destroyed
Note:   calls INT 21/AX=4404h"IOCTL" with a five-byte buffer containing "MDF??"
SeeAlso: AX=4A17h
--------D-2F4A31-----------------------------
INT 2F U - Windows95 - ???
        AX = 4A31h
        CL = new value for ???
        DS:SI -> BYTE to be set to CL
Return: nothing
--------D-2F4A32-----------------------------
INT 2F U - Windows95 - PATCH ???
        AX = 4A32h
        BL = subfunction
            00h get ???
                Return: AX = flag: subfunction 04h has been used (0000h/FFFFh)
                        DX = ??? (0000h/?)
            01h patch ??? in IO.SYS (segment 0070h)
            02h unpatch ??? in IO.SYS
            03h ???
            04h set ???, then do subfunction 01h
            05h unset ???, then do subfunction 02h
            else
                Return: nothing
--------D-2F4A33-----------------------------
INT 2F - Windows95 - CHECK MS-DOS VERSION 7
        AX = 4A33h
Return: AX = 0000h for MS-DOS 7.00+
            (officially) BX,DX,SI,DS may be destroyed
            (undoc) DS:DX -> ASCIZ primary shell executable name
            (undoc) DS:SI -> CONFIG.SYS SHELL= command line (counted string)
            (undoc) BH = ??? (0000h)
            (undoc) BL = ??? (0000h)
        AX nonzero (usually 4A33h) if MS-DOS 6- or other DOS
SeeAlso: AX=1611h,INT 21/AH=30h
--------N-2F4B-------------------------------
INT 2F - LAN Manager 2.0 DOS Enh NETWKSTA.EXE - NETWORK WORKSTATION REDIRECTOR
        AH = 4Bh
        ???
Return: ???
Note:   LAN Manager enhanced mode adds features beyond the standard redirector
          file/printer services
SeeAlso: AX=118Ah,AX=4100h,AH=42h
--------T-2F4B01-----------------------------
INT 2F C - DOS 5+ TASK SWITCHER - BUILD CALLOUT CHAIN
        AX = 4B01h
        CX:DX -> task switcher entry point (see #02819)
        ES:BX = 0000h:0000h
Return: ES:BX -> callback info structure (see #02817) or 0000h:0000h
Notes:  called by the task switcher
        this function is hooked by clients which require notification of task
          switcher activities; the call must first be passed on to the prior
          handler with registers unchanged using a simulated interrupt.  On
          return, the client must build a callback info structure and store
          the returned ES:BX in the "next" field, then return the address of
          its own callback info structure.
        a client program must add itself to the notification chain if it
          provides services to other programs; before terminating, it must
          remove itself from the chain by calling the task switcher's entry
          point with AX=0005h (see #02819)
        the task switcher entry point should not be saved, as it is subject to
          change and will be provided on any notification call
        the Windows 3.1 Standard Mode supports this API
SeeAlso: AX=160Bh,AX=4B02h

Format of task switcher callback info structure:
Offset  Size    Description     (Table 02817)
 00h    DWORD   pointer to next callback info structure
 04h    DWORD   pointer to notification function (see #02818)
 08h    DWORD   reserved
 0Ch    DWORD   address of zero-terminated list of API info structures
                (see #02821)

(Table 02818)
Values task switcher notification function is called with:
        AX = function
            0000h switcher initialization
                Return: AX = status
                            0000h if OK to load
                            nonzero to abort task switcher
            0001h query suspend
                BX = session ID
                Return: AX = status
                            0000h if OK to switch session
                            0001h if not
            0002h suspend session
                BX = session ID
                interrupts disabled
                Return: AX = 0000h if OK to switch session
                           = 0001h if not
            0003h activate session
                BX = session ID
                CX = session status flags
                        bit 0: set if first activation of session
                        bits 1-15: reserved (0)
                interrupts disabled
                Return: AX = 0000h
            0004h session active
                BX = session ID
                CX = session status flags
                        bit 0: set if first activation of session
                        bits 1-15: reserved (0)
                Return: AX = 0000h
            0005h create session
                BX = session ID
                Return: AX = 0000h if OK to create session
                           = 0001h if not
            0006h destroy session
                BX = session ID
                Return: AX = 0000h
            0007h switcher termination
                BX = flags
                    bit 0: set if calling switcher is only switcher loaded
                    bits 1-15: reserved (0)
                Return: AX = 0000h
        ES:DI -> task switcher entry point (see #02819)
Notes:  function 0000h is generally called by the program which controls or
          invokes the task switcher, rather than by the task switcher itself;
          the entry point supplied to this function is not necessarily the
          entry point to the task switcher itself, and may be 0000h:0000h.  If
          any client indicates that loading is not possible, all clients will
          be called with function 0007h; thus it is possible for a client to
          receive a termination notice without a corresponding initialization
          notice.
        except for functions 0002h and 0003h, the notification handler is
          called with interrupts enabled and may make any INT 21h function
          call; interrupts must not be enabled in functions 0002h and 0003h
        function 0007h may be called with ES:DI = 0000h:0000h if the entry
          point is no longer valid
--------T-2F4B02BX0000-----------------------
INT 2F - DOS 5+ TASK SWITCHER - INSTALLATION CHECK
        AX = 4B02h
        BX = 0000h
        ES:DI = 0000h:0000h
Return: ES:DI = 0000h:0000h if task switcher not loaded
        ES:DI -> task switcher entry point (see #02819) if loaded
            AX = 0000h
Notes:  the returned entry point is that for the most-recently loaded task
          switcher; the entry points for prior task switchers may be determined
          with the "get version" call (see #02819)
        this function is supported by PC Tools v8+ CPTASK
SeeAlso: AX=4A05h,AX=4B03h

(Table 02819)
Call task switcher entry point with:
        AX = 0000h get version
                Return: CF clear if successful
                            AX = 0000h
                            ES:BX -> task switcher version struct (see #02820)
                        CF set if unsupported function
        AX = 0001h test memory region
                ES:DI -> first byte to be tested
                CX = size of region to test
                Return: CF clear if successful
                            AX = memory type of tested region
                                0000h global
                                0001h global and local
                                0002h local (replaced on session switch)
                        CF set if unsupported function
        AX = 0002h suspend switcher
                ES:DI -> new task switcher's entry point
                Return: CF clear if successful
                            AX = state
                                0000h switcher has been suspended
                                0001h switcher not suspended, new switcher must
                                        abort
                                0002h switcher not suspended, but new switcher
                                        may run anyway
                        CF set if unsupported function
        AX = 0003h resume switcher
                ES:DI -> new task switcher's entry point
                Return: CF clear if successful
                            AX = 0000h
                        CF set if unsupported function
        AX = 0004h hook notification chain
                ES:DI -> callback info structure to be added to chain
                          (see #02817)
                Return: CF clear if successful
                            AX = 0000h
                        CF set if unsupported function
        AX = 0005h unhook notification chain
                ES:DI -> callback info structure to be removed from chain
                          (see #02817)
                Return: CF clear if successful
                            AX = 0000h
                        CF set if unsupported function
        AX = 0006h query API support
                BX = asynchronous API identifier
                Return: CF clear if successful
                            AX = 0000h
                            ES:BX -> API info structure (see #02821) for the
                                      client which provides the highest
                                      level of API support
                        CF set if unsupported function

Format of task switcher version structure:
Offset  Size    Description     (Table 02820)
 00h    WORD    major version of supported protocol  (current protocol is 1.0)
 02h    WORD    minor version of supported protocol
 04h    WORD    major version of task switcher
 06h    WORD    minor version of task switcher
 08h    WORD    task switcher ID (see AX=4B03h)
 0Ah    WORD    operation flags
                bit 0: set if task switcher disabled
                bits 1-15: reserved (0)
 0Ch    DWORD   pointer to ASCIZ task switcher name
                ("MS-DOS Shell Task Switcher" for DOSSHELL task switcher)
 10h    DWORD   pointer to previous task switcher's entry point or 0000h:0000h

Format of API info structure:
Offset  Size    Description     (Table 02821)
 00h    WORD    size of structure in bytes (000Ah)
 02h    WORD    API identifier
                0001h NetBIOS
                0002h 802.2
                0003h TCP/IP
                0004h LAN Manager named pipes
                0005h Novell NetWare IPX
 04h    WORD    major version \ of highest version of API for which the support
 06h    WORD    minor version / level specified in the next field is provided
 08h    WORD    support level
                0001h minimal support
                0002h API-level support
                0003h switcher compatibility
                0004h seamless compatibility
--------T-2F4B03-----------------------------
INT 2F - DOS 5+ TASK SWITCHER - ALLOCATE SWITCHER ID
        AX = 4B03h
        ES:DI -> task switcher entry point (see #02819)
Return: AX = 0000h
        BX = switcher ID (0001h-000Fh), or 0000h if no more available
Notes:  if a task switcher has determined that it is the first to be loaded, it
          must allocate an identifier for itself and provide this function to
          all subsequent task switchers; if it is not the first to be loaded,
          it must call this function to allocate an ID.  The switcher ID is
          used as the high four bits of all session identifiers to ensure
          unique session IDs.
        if no more switcher IDs are available, the new task switcher making the
          call must terminate or disable itself
        the task switcher providing the identifiers may call the new task
          switcher's entry point as needed
        this call is available from within DOSSHELL even if the task switcher
          is not installed
        this function is supported by PC Tools v8+ CPTASK, but appears to
          always return an ID of 0000h
SeeAlso: AX=4B02h,AX=4B04h
--------T-2F4B04-----------------------------
INT 2F - DOS 5+ TASK SWITCHER - FREE SWITCHER ID
        AX = 4B04h
        BX = switcher ID
        ES:DI -> task switcher entry point (see #02819)
Return: AX = 0000h
        BX = status
            0000h successful
            other error (invalid ID or ID not allocated)
Notes:  called by a task switcher when it exits, unless it was the first loaded
          and is providing the support for AX=4B03h and AX=4B04h
        the task switcher providing the identifiers may call the terminating
          task switcher's entry point as needed
        this call is available from within DOSSHELL even if the task switcher
          is not installed
        this call is supported by PC Tools v8+ CPTASK, but appears to return
          sucessfully no matter which ID is given
SeeAlso: AX=4B02h,AX=4B03h
--------T-2F4B05-----------------------------
INT 2F C - DOS 5+ TASK SWITCHER - IDENTIFY INSTANCE DATA
        AX = 4B05h
        ES:BX = 0000h:0000h
        CX:DX -> task switcher entry point (see #02819)
Return: ES:BX -> startup info structure (see #02822) or 0000h:0000h
Notes:  called by task switcher
        clients with instance data should hook this call, pass it through to
          the previous handler with unchanged registers using a simulated
          interrupt.  On return, the client should create a startup info
          structure (see #02822), store the returned ES:BX in the "next"
          field, and return the address of the created structure in ES:BX
        all MS-DOS function calls are available from within this call
        this function is supported by Novell DOS 7 DOSKEY, with structure v3.00
SeeAlso: AX=1605h,AX=160Bh,AX=4B02h

Format of task switcher startup info structure:
Offset  Size    Description     (Table 02822)
 00h  2 BYTEs   major, minor version of info structure (03h,00h)
 02h    DWORD   pointer to next startup info structure or 0000h:0000h
 06h    DWORD   0000h:0000h (ignored)
 0Ah    DWORD   ignored
 0Eh    DWORD   pointer to instance data records (see #02823)

Format of one instance data record in array:
Offset  Size    Description     (Table 02823)
 00h    DWORD   address of instance data (end of array if 0000h:0000h)
 04h    WORD    size of instance data
--------W-2F4B06-----------------------------
INT 2F - MS Windows - WIN.COM - GET ??? POINTER TO WIN.COM
        AX = 4B06h
Return: AX = 0000h
        ES:BX -> ??? function in WIN.COM
Note:   the entry point is called with
            AX = 0001h or 0003h
            BX = ???
SeeAlso: AX=4B80h
--------W-2F4B20-----------------------------
INT 2F - MS Windows 3+ - WIN.COM - SET PROGRAM TO EXECUTE ON EXIT
        AX = 4B20h
Return: AX = 0000h if successful
            DX:CX -> 256-byte buffer for pathname and commandline (see #02824)
Notes:  when the Windows function ExitWindows is called with an exit code of
          44h, WIN.COM executes the program specified in the returned buffer
          and then restarts Windows
        the returned address is a real-mode segment:offset value
SeeAlso: AX=4B21h

Format of WIN.COM buffer:
Offset  Size    Description     (Table 02824)
 00h 128 BYTEs  commandline for program (count byte, command tail, 0Dh)
 80h 128 BYTEs  ASCIZ pathname of program to execute
Note:   the order above is for a Windows95 DOS box; it may be reversed under
          Windows 3.x
--------W-2F4B21-----------------------------
INT 2F - Windows95 - WIN.COM - GET NESTING LEVEL
        AX = 4B21h
Return: AH = 00h if WIN.COM already active
            AL = number of instances of WIN.COM in memory
SeeAlso: AX=4B20h
--------K-2F4B52-----------------------------
INT 2F - KeyRus v7.3 - API
        AX = 4B52h ('KR')
        BL = function number
            00h installation check
                Return: AL = 82h if installed
                            BH = major version number
                            BL = minor version number
                            ES destroyed
            01h get driver status
                Return: AL??? = current status (see #02825)
            02h set driver state
                AL = new driver state (see #02825)
            03h blank screen (if blanking enabled when TSR was loaded)
            04h unblank screen
            4Ch switch to English keyboard mode
            90h switch to Russian keyboard mode
Return:

Bitfields for KeyRus driver status:
Bit(s)  Description     (Table 02825)
 1-0    language mode
        00 Latin
        01 Russian
        10 Alternative
        11 unused
 2      allow character loading (if disabled, use ROM fonts)
 3      English keyboard support
 7-4    used internally (read-only)
--------W-2F4B80-----------------------------
INT 2F - MS Windows - WSWAP.EXE - RESET INTERNAL VARIABLES
        AX = 4B80h
Return: nothing
Note:   called by WINOLDAP.MOD
SeeAlso: AX=4B06h
--------p-2F4C-------------------------------
INT 2F U - Advanced Power Management
        AH = 4Ch
        AL = function
            00h version check
            01h suspend system requested
            FFh suspend/resume battery notification
        ???
Return: ???
----------2F4D-------------------------------
INT 2F U - ???
        AH = 4Dh
        ???
Return: ???
Note:   reportedly called by Kana Kanji Converter and MSKK
--------N-2F4E53BL00-------------------------
INT 2F - SilverNET v2+ - INSTALLATION CHECK
        AX = 4E53h ("NS")
        BL = 00h (function "installation check")
        BH = module ID (see #02826)
Return: AX = 0000h if specified module installed
        BX = 4E53h if installed
Program: SilverNET is an SMB-compatible peer-to-peer NOS for DOS or
          Windows systems, by Net-Source, Inc. of Santa Clara, CA.
SeeAlso: AX=4E53h/BL=01h,AX=4E53h/BL=02h,AX=B800h,AX=B809h

(Table 02826)
Values for SilverNET module ID:
 01h    SilverCACHE
 02h    Workstation
 03h    NetBIOS
 04h    Peer
 20h    NS Share
 80h    NetWare help TSR
--------N-2F4E53BL01-------------------------
INT 2F - SilverNET - GET RUNTIME PARAMETER
        AX = 4E53h ("NS")
        BL = 01h (function "get runtime parameter")
        BH = module ID (see #02826)
        CX = parameter index (see #02827,#02829,#02830)
Return: AX = WORD value at specified index (see #02828)
Desc:   retrieve a word of data from the specified SilverNET module

(Table 02827)
Values for SilverNET Peer parameter index (* = read-only):
 00h *  maximum outstanding SMB buffers
 02h *  maximum logged-in nodes
 04h *  number of shareable resources
 06h *  number of characters to print per time slice
 08h *  number of printers that can be shared
 0Ah *  number of nodes logged in
 0Ch *  number of files to allow opened
 0Eh    how fast to despool (/PSLICE)
 10h    audit flag
 24h *  far pointer to resource table (each resource is 96 bytes in length)
 32h *  far pointer to SFT (internal if SilverNET files > CONFIG.SYS files,
        else DOS SFT)
 36h    spool flags (see #02828)
SeeAlso: #02829

Bitfields for spool flags:
Bit(s)  Description     (Table 02828)
 0      LPT1 needs despooling
 1      LPT2 needs despooling
 2      LPT2 needs despooling
 4      COM1 needs despooling
 5      COM2 needs despooling
 6      COM3 needs despooling
SeeAlso: #02827

(Table 02829)
Values for NS Share parameter index (* = read-only):
 00h    version number (high byte = minor, low byte = major)
 10h *  segment of first lock record (other records in consecutive paragraphs)
        (if PSP field = 0000h, lock record is free)
 12h *  maximum possible number of lock records
 14h *  starting segment of sharing buffer
        (NS Share's sharing records are identical to DOS SHARE except that
          fields which are normally offsets into SHARE are segment numbers)
 18h *  size of sharing buffer in paragraphs
 1Ah *  total free paragraphs in sharing buffer
 1Ch *  current number of shared files
 1Eh *  current number of locked records
SeeAlso: #02827,#02830

(Table 02830)
Values for Workstation parameter index (* = read-only):
 00h    version number (high byte = minor, low byte = major)
 02h *  size of each network buffer for file operations
 04h *  number of redirector file buffers
 06h *  size of each print cache buffer
 08h *  number of network LPT printers
 0Ch    flush time in ticks (idle time on network printer before flushing)
 0Eh    (16 WORDs) last active time for each printer
 2Eh *  stub segment if program split into two parts
 60h    receive name number for datagram listens
 62h *  18-byte machine name
 74h *  LASTDRIVE (01h = A:, etc.)
 7Ch    row number of message box on screen
 7Eh    message time in clock ticks
 82h *  number of network adapters in use
 84h    station ID broadcast flag (never set on redirectors)
 96h *  NetBIOS names left
 98h *  NCBs left
 9Ah *  sessions left
 A2h *  total number of network printers (LPT+COM)
 A4h *  number of serial network printers
 A8h *  segment containing file cache buffers
 AAh *  segment containing print cache buffers
 ACh *  bytes remaining free in HMA before program loaded
 AEh *  start of free memory in HMA
 B2h *  flag: using HMA
SeeAlso: #02829
--------N-2F4E53BL02-------------------------
INT 2F - SilverNET - SET RUNTIME PARAMETERS
        AX = 4E53h ("NS")
        BL = 02h (function "set runtime parameters")
        BH = module ID (see #02826)
        CX = parameter index (see #02829,#02830)
        DX = new value for specified parameter
Desc:   set a WORD value in the specified SilverNET module
Note:   not all indexed parameters are writable; modifying a read-only
          parameter can result in system crashes
SeeAlso: AX=4E53h/BL=00h,AX=4E53h/BL=01h
--------N-2F5100-----------------------------
INT 2F U - ODIHLP.EXE - INSTALLATION CHECK
        AX = 5100h
Return: AL = FFh if installed
            BX = 0000h
            DX:SI -> signature string "ODI$HLP$"
Program: ODIHLP is a real-mode helper allowing the Windows for Workgroups 3.11
          protected-mode NDIS3 protocol to work with real-mode ODI drivers
          and LSL.COM
Note:   the returned signature string might be the first field of a structure
SeeAlso: AX=C000h"LSL.COM"
--------k-2F5200-----------------------------
INT 2F - JAM.SYS v1.10+ - "GetVersion" - INSTALLATION CHECK
        AX = 5200h
Return: AH = 80h (successful) if installed
        BX = internal JAM.SYS version number
        CX = size of JAMINFO structure (see #02831,#02832)
        DX = JAM.SYS segment address
Program: JAM.SYS is a main component of the JAM Real-Time Data Compression
          Utilities by George A. Reznik and friends (JAM Software).
SeeAlso: AX=5201h

Format of JAMINFO v1.10 structure:
Offset  Size    Description     (Table 02831)
 00h 25 BYTEs   extended BIOS parameter block (BPB)
 19h 11 BYTEs   ???
 25h    DWORD   total number of sectors in JAM archive file
                (size of compressed data area)
 29h    BYTE    flags (see #02833)
 2Ah 127 BYTEs  full JAM archive file name
 A9h    WORD    the number of fragments in archive file
 ABh 96 BYTEs   archive file fragmentation list -
                array of 16 FRAGMENT structures (see #02834)
10Bh    DWORD   address of the host-drive DPB (Drive Parameter Block)
10Fh    DWORD   number of free sectors in JAM archive file
113h    WORD    device status word (see #02835)
SeeAlso: #02832

Format of JAMINFO v1.20 structure:
Offset  Size    Description     (Table 02832)
 00h 25 BYTEs   extended BIOS parameter block (BPB)
 19h    BYTE    physical driver number
 1Ah    BYTE    reserved
 1Bh    BYTE    extended boot record signature
 1Ch    DWORD   volume serial number
 20h 11 BYTEs   volume label
 2Bh  8 BYTEs   file system ID
 33h    DWORD   total number of sectors in JAM archive file
                (size of compressed data area)
 37h    BYTE    flags (see #02833)
 38h 128 BYTEs  full JAM archive file name
 B8h    WORD    the number of fragments in archive file
 BAh 96 BYTEs   archive file fragmentation list -
                array of 16 FRAGMENT structures (see #02834)
11Ah    DWORD   address of the host-drive DPB (Drive Parameter Block)
11Eh    DWORD   number of free sectors in JAM archive file
122h    WORD    device status word (see #02835)
Note:   the first 33h bytes are copied from the archive file's boot sector
SeeAlso: #02831

Bitfields for JAMINFO flags:
Bit(s)  Description     (Table 02833)
 2-0    reserved
 3      (v1.20+)
 4      enable direct write requests (Int 26h, non-DOS requests, etc.)
 5      read-only mode
 6      no write-behind caching
 7      full undelete-compatible allocation strategy
SeeAlso: #02831,#02832

Format of JAM FRAGMENT structure:
Offset  Size    Description     (Table 02834)
 00h    WORD    starting sector (low word)
 02h    BYTE    starting sector (high byte)
 03h    WORD    size of fragment (low word)
 05h    BYTE    size of fragment (high byte)
SeeAlso: #02831,#02832

(Table 02835)
Values for JAM.SYS status (high byte):
 00h    successful
 01h    drive is not a JAM drive
 02h    drive is already attached
 03h    archive file cluster size value is larger than driver's one
 04h    drive is not attached
 05h    drive is locked
 06h    drive is not locked
 07h    bad physical-level request
 08h    host drive reading/writing error
 09h    bad entries in JAM descriptor table
 0Ah    compressed data integrity error
 0Bh    archive file overflow
 0Ch    bad DOS request
 0Dh    incorrect parameters in JAMINFO structure
Note:   the low byte of the status is the DOS error code for the Host drive
SeeAlso: #02598 at INT 2F/AX=0802h
--------k-2F5201-----------------------------
INT 2F - JAM.SYS v1.10+ - "GetInfo" - GET COMPRESSED DRIVE INFORMATION
        AX = 5201h
        DL = compressed drive number (0-default, 1-A:, etc.)
        DS:BX -> buffer for JAMINFO structure (see #02831,#02832)
Return: AH = status (00h,01h) (see #02835)
SeeAlso: AX=5200h
--------k-2F5202-----------------------------
INT 2F - JAM.SYS v1.10+ - "Attach" - MOUNT COMPRESSED DRIVE
        AX = 5202h
        DL = drive number (0-default, 1-A:, etc.) to attach to the JAM
              archive file
        DS:BX -> pointer to JAMINFO structure (see #02831,#02832), which
              contains parameters of the JAM file to mount, and pointer
              to the host drive DPB (i.e. DPB of the drive on which the
              JAM file is located)
Return: AH = status (00h,02h,03h,08h,09h,0Dh) (see also #02835)
            03h archive file cluster size value is larger than driver's - not
                  mounted
            09h bad entries in JAM descriptor table - file mounted read-only
        AL = host drive error code (see #02598 at INT 2F/AX=0802h)
SeeAlso: AX=5203h
--------k-2F5203-----------------------------
INT 2F - JAM.SYS v1.10+ - "Detach" - UNMOUNT COMPRESSED DRIVE
        AX = 5203h
        DL = drive number (0-default, 1-A:, etc.) to detach
Return: AH = status (00h,01h,04h,05h,08h,09h,0Bh,0Dh) (see #02835)
        AL = host drive error code (see #02598 at INT 2F/AX=0802h)
SeeAlso: AX=5202h
--------k-2F5204-----------------------------
INT 2F - JAM.SYS v1.10+ - "Lock" - LOCK COMPRESSED DRIVE
        AX = 5204h
        DL = drive number (0-default, 1-A:, etc.) to lock
Return: AH = status (00h,01h,04h,05h,08h,09h,0Bh,0Dh) (see #02835)
        AL = host drive error code (see #02598 at INT 2F/AX=0802h)
SeeAlso: AX=5205h, AX=5206h, AX=5207h
--------k-2F5205-----------------------------
INT 2F - JAM.SYS v1.10+ - "UnLock" - UNLOCK COMPRESSED DRIVE
        AX = 5205h
        DL = drive number (0-default, 1-A:, etc.) to unlock
Return: AH = status (00h,01h,04h,06h,08h,09h,0Dh) (see #02835)
        AL = host drive error code (see #02598 at INT 2F/AX=0802h)
SeeAlso: AX=5204h, AX=5206h, AX=5207h
Note:   Lock and UnLock functions were added to the JAM API to prevent
          asynchronous physical-level access (see AX=5206h,AX=5207h) to
          compressed data on JAM drives. In other words, two or more programs
          which use JAM API (say, JMAX optimizer and JCHKDSK - disk checker)
          cannot be run on the same JAM drive simultaneously.
--------k-2F5206-----------------------------
INT 2F - JAM.SYS v1.10+ - "Read" - PHYSICAL READ DATA FROM JAM ARCHIVE
        AX = 5206h
        DL = drive number (0-default, 1-A:, etc.)
        DS:BX -> disk transfer packet (see #02836)
Return: AH = status (00h,01h,04h,06h,07h,08h,0Dh) (see #02835)
        AL = host drive error code (see #02598 at INT 2F/AX=0802h)
Program: JAM.SYS is a main component of the JAM Real-Time Data Compression
          Utilities by George A. Reznik and friends (JAM Software).
SeeAlso: AX=5207h

Format of disk transfer packet:
Offset  Size    Description     (Table 02836)
 00h    DWORD   sector number
 04h    WORD    number of sectors to read(write)
 06h    DWORD   transfer address
--------k-2F5207-----------------------------
INT 2F - JAM.SYS v1.10+ - "Write" - PHYSICAL WRITE DATA TO JAM ARCHIVE
        AX = 5207h
        DL = drive number (0-default, 1-A:, etc.)
        DS:BX -> disk transfer packet (see #02836)
Return: AH = status (00h,01h,04h,06h,07h,08h,0Dh) (see #02835)
        AL = host drive error code (see #02598 at INT 2F/AX=0802h)
SeeAlso: AX=5206h
--------p-2F53-------------------------------
INT 2F U - POWER.EXE - APM event broadcasting???
        AH = 53h
        AL = event???
            05h CPU idle
            0Bh PM event broadcast API
Return: ???
Note:   called by MS Windows 3.1 POWER.DRV; hooked by MS Mouse driver v8.20+
          and PC-Cache v8.0
SeeAlso: AX=530Bh,AX=5400h,INT 33/AX=002Fh
--------p-2F530B-----------------------------
INT 2F U - ??? (MOUSEPWR.COM, others) - ???
        AX = 530Bh
        BX = subfunction
            0003h ???
            0004h ???
        ???
Return: ???
Note:   it appears that subfunction 0003h reads or restores the current mouse
          settings (the MS Mouse driver hooks AX=530Bh), and 0004h might be
          the converse
--------p-2F5400-----------------------------
INT 2F U - POWER.EXE - INSTALLATION CHECK
        AX = 5400h
Return: AX = POWER.EXE version (AH = major, AL = minor) if installed
        BX = 504Dh ("PM")
        CF clear
Note:   called by MS Windows 3.1 POWER.DRV
SeeAlso: AH=53h,AX=5401h,AX=5402h,AX=5481h,AX=5482h
--------p-2F5401-----------------------------
INT 2F U - POWER.EXE - GET/SET POWER STATUS
        AX = 5401h
        BH = function
            00h get status
                Return: BL = current power management status (see #02837)
            01h set status
                BL = new power managment status (see #02837)
Return: AX = function status (see #02838)
Note:   called by MS Windows 3.1 POWER.DRV
SeeAlso: AH=53h,AX=5400h,AX=5402h,AX=5403h

Bitfields for power management status:
Bit(s)  Description     (Table 02837)
 0      POWER.EXE power management enabled
 1      APM firmware power management enabled
 2-7    reserved (0)
Notes:  bit 1 is ignored if there is no APM firmware
        bits 1-0: 00 = POWER OFF, 10 = POWER STD, 11 = POWER ADV

(Table 02838)
Values for POWER.EXE function status:
 0000h  successful
 0002h  "ERROR_PM_ALREADY_CONNECTED"
 0003h  "ERROR_PM_NOT_CONNECTED"
 0087h  "ERROR_PM_INVALID_PARAMETER"
--------p-2F5402-----------------------------
INT 2F U - POWER.EXE - GET/SET IDLE DETECTION STRATEGY
        AX = 5402h
        BH = subfunction
            00h get
            other set
                BL = detection strategy (00h-0Fh or FFh)
Return: BX = current/new detection strategy
SeeAlso: AH=53h,AX=5400h,AX=5401h,AX=5481h,AX=5482h
--------p-2F5403-----------------------------
INT 2F U - POWER.EXE - GET/SET ADVANCED POWER MANAGEMENT SETTING
        AX = 5403h
        BX = new power management setting or 0000h to get current setting
Return: AX = status
            0000h successful
                BX = power management setting (see #02839)
            other error code
SeeAlso: AX=5401h,AX=5480h

(Table 02839)
Values for power management setting:
 0001h-0005h "min"
 0006h       "reg"
 0007h-0008h "max"
--------t-2F5453-----------------------------
INT 2F - TesSeRact RAM-RESIDENT PROGRAM INTERFACE
        AX = 5453h
        BX = subfunction
            00h installation check
                CX = 0000h
                DS:SI -> 8-char blank-padded name (see #02840)
                Return: AX = FFFFh installed
                                CX = ID number of already-installed copy
                        AX = anything else, not installed
                                CX = ID number for TSR when installed
            01h get user parameters
                CX = TSR ID number
                Return: AX = status
                            0000h successful
                                ES:BX -> user parameter block (see #02841)
                            nonzero failed
            02h check if hotkey in use
                CL = scan code of hot key (see #00006)
                Return: AX = FFFFh hot key conflicts with another TSR
                             otherwise safe to use the hotkey
            03h replace default critical error handler
                CX = TSR ID number
                DS:SI -> new routine for INT 24h
                Return: AX = nonzero, unable to install new handler
            04h get internal data area
                CX = TSR ID number
                Return: AX = status
                            0000h successful
                                ES:BX -> TSR's internal data area (see #02842)
                            nonzero, TSR not found
            05h set multiple hot keys
                CX = TSR ID number
                DL = number of additional hot keys to allocate
                DS:SI -> table of hot keys
                        BYTE  hotkey scan code (see #00006)
                        BYTE  hotkey shift state
                        BYTE  flag value to pass to TSR (nonzero)
                Return: AX = nonzero, unable to install hot keys
            06h - 0Fh reserved
            10h enable TSR
                CX = TSR ID number
                Return: AX = nonzero, unable to enable
            11h disable TSR
                CX = TSR ID number
                Return: AX = nonzero, unable to disable
            12h unload TSR
                CX = TSR ID number
                Return: AX = nonzero, invalid TSR number
                Note: if any interrupts used by TSR have been grabbed by
                        another TSR, the TesSeRact routines will wait until
                        it is safe to remove the indicated TSR from memory
            13h restart TSR
                CX = TSR ID number of TSR which was unloaded but is still in
                     memory
                Return: AX = nonzero, unable to restart TSR
            14h get status word
                CX = TSR ID number
                Return: AX = FFFFh invalid ID number
                           = other, successful
                                BX = bit flags
            15h set status word
                CX = TSR ID number
                DX = new bit flags
                Return: AX = nonzero, unable to set status word
            16h get INDOS state at popup
                CX = TSR ID number
                Return: AX = 0000h successful
                            BX = value of INDOS flag
            17h - 1Fh reserved
            20h call user procedure
                CX = TSR ID number
                ES:DI -> user-defined data
                Return: AX = 0000h successful
            21h stuff keystrokes into keyboard buffer
                CX = TSR ID number
                DL = speed
                    00h stuff keystrokes only when buffer is empty
                    01h stuff up to four keystrokes per clock tick
                    02h stuff up to 15 keystrokes per clock tick
                DH = scan code flag
                    if zero, buffer contains alternating ASCII and scan codes
                    if nonzero, buffer contains only ASCII codes
                SI = number of keystrokes
                ES:DI -> buffer to stuff
                Return: AX = 0000h success
                             F0F0h user aborted with ^C or ^Break
                             other unable to stuff keystrokes
            22h (v1.10) trigger popup
                CX = TSR ID number
                Return: AX = 0000h success, TSR will either pop up or beep to
                                   indicate that it is unable to pop up
                             nonzero invalid ID number
            23h (v1.10) invoke TSR's background function
                CX = TSR ID number
                Return: AX = 0000h success
                             FFFFh not safe to call background function
                             nonzero invalid ID number
            24h - 2Fh reserved
Notes:  Borland's THELP.COM popup help system for Turbo Pascal and Turbo C
          (versions 1.x and 2.x only) fully supports the TesSeRact API, as
          do the SWAP?? programs by Innovative Data Concepts.
        AVATAR.SYS supports functions 00h and 01h (only the first three fields
          of the user parameter block) using the name "AVATAR  "
SeeAlso: AX=CAFEh,INT 16/AX=55FFh,INT 2D"AMIS"
Index:  installation check;TesSeRact TSR interface|uninstall;TesSeRact

(Table 02840)
Values for TesSeRact names:
 "AVATAR  "     AVATAR.SYS
 "QeditTSR"     TSR version of SemWare's Qedit editor
 "SCRNBLNK"     Trusted Access screen blanker

Format of TesSeRact User Parameter Block:
Offset  Size    Description     (Table 02841)
 00h  8 BYTEs   blank-padded TSR name
 08h    WORD    TSR ID number
 0Ah    DWORD   bitmap of supported functions
 0Eh    BYTE    scan code of primary hotkey (see #00006)
                00h = pop up when shift states match
                FFh = no popup (if shift state also FFh)
 0Fh    BYTE    shift state of primary hotkey
                FFh = no popup (if scan code also FFh)
 10h    BYTE    number of secondary hotkeys
 11h    DWORD   pointer to extra hotkeys set by func 05h
 15h    WORD    current TSR status flags
 17h    WORD    PSP segment of TSR
 19h    DWORD   DTA for TSR
 1Dh    WORD    default DS for TSR
 1Fh    DWORD   stack at popup
 23h    DWORD   stack at background invocation
Index:  hotkeys;TesSeRact TSR interface

Format of TSR internal data area:
Offset  Size    Description     (Table 02842)
 00h    BYTE    revision level of TesSeRact library
 01h    BYTE    type of popup in effect
 02h    BYTE    INT 08 occurred since last invocation
 03h    BYTE    INT 13 occurred since last invocation
 04h    BYTE    active interrupts
 05h    BYTE    active soft interrupts
 06h    BYTE    DOS major version
 07h    BYTE    how long to wait before popping up
 08h    DWORD   pointer to INDOS flag
 0CH    DWORD   pointer to DOS critical error flag
 10h    WORD    PSP segment of interrupted program
 12h    WORD    PSP segment of prog interrupted by INT 28
 14h    DWORD   DTA of interrupted program
 18h    DWORD   DTA of program interrupted by INT 28
 1Ch    WORD    SS of interrupted program
 1Eh    WORD    SP of interrupted program
 20h    WORD    SS of program interrupted by INT 28
 22h    WORD    SP of program interrupted by INT 28
 24h    DWORD   INT 24 of interrupted program
 28h  3 WORDs   DOS 3.0+ extended error info
 2Eh    BYTE    old BREAK setting
 2Fh    BYTE    old VERIFY setting
 30h    BYTE    were running MS WORD 4.0 before popup
 31h    BYTE    MS WORD 4.0 special popup flag
 32h    BYTE    enhanced keyboard call in use
 33h    BYTE    delay for MS WORD 4.0
11 times (for INTs 08h,09h,13h,16h,1Ch,21h,28h,2Fh,1Bh,23h, and 24h):
        DWORD   old interrupt vector
        BYTE    interrupt number
        WORD    offset in TesSeRact code segment of new interrupt handler
--------p-2F5480-----------------------------
INT 2F U - POWER.EXE - GET/SET ???
        AX = 5480h
        BX = direction
            0000h get
            other set
        CX = size of buffer (at least 0010h)
        DS:SI -> buffer
Return: AX = status
            0000h successful
            other error code
SeeAlso: AX=5400h,AX=5481h,AX=548Fh
--------p-2F5481-----------------------------
INT 2F U - POWER.EXE - GET STATISTICS
        AX = 5481h
        BX = which statistics
            0000h idle detection
            0001h APM statistics
        CX = length of buffer in bytes
        DS:SI -> buffer for statistics (see #02843,#02844)
Return: AX = status
            0000h successful
            0071h "ERROR_PM_BUFFER_TOO_SMALL"
            0087h "ERROR_PM_INVALID_PARAMETER"
SeeAlso: AH=53h,AX=5400h,AX=5480h,AX=5402h,AX=5482h

Format of POWER.EXE idle detection statistics:
Offset  Size    Description     (Table 02843)
 00h    DWORD   "CPU_ON_TIME" total time CPU is active with POWER.EXE idle
                  detection enabled, in timer ticks
 04h    DWORD   "CPU_IDLE_TIME" timer ticks during which CPU was idle
                (divide by previous to get idle rate)
 08h    DWORD   total idle calls
 0Ch    DWORD   "TOTAL_APP_IDLE" total INT 2Fh idle calls
 10h    DWORD   "TOTAL_DOS_YIELD" total INT 28h idle calls
 14h    DWORD   "TOTAL_KEY_IDLE" total INT 16h idle calls
 18h    DWORD   "TOTAL_DOS_IDLE" total INT 2Ah idle calls

Format of APM statistics:
Offset  Size    Description     (Table 02844)
 00h    DWORD   "RESUME_COUNT" total number of resumes since last APM_ENABLE
--------p-2F5482-----------------------------
INT 2F U - POWER.EXE - GET/SET APM POLLING FREQUENCY
        AX = 5482h
        BX = new polling frequency or 0000h to get current frequency
Return: AX = 0000h (successful)
        BX = current frequency if BX=0000h on entry
SeeAlso: AH=53h,AX=5400h,AX=5401h,AX=5480h,AX=5481h,AX=548Fh
--------p-2F548F-----------------------------
INT 2F U - POWER.EXE - GET/SET ???
        AX = 548Fh
        BX = ??? or 0000h to get current ???
Return: AX = 0000h (successful)
        BX = current ???
        CX = ???
SeeAlso: AX=5400h,AX=5480h,AX=5482h
--------l-2F5500-----------------------------
INT 2F U - DOS 5+ - COMMAND.COM INTERFACE
        AX = 5500h
Return: AX = 0000h if an instance of COMMAND.COM is already running
        DS:SI -> entry point table
Notes:  used to access the shareable portion of COMMAND.COM, which may have
          been moved into the HMA; only the primary COMMAND.COM retains this
          portion
        procedures called from a dispatcher in COMMAND's resident portion;
          most assume that the segment address of the resident portion is on
          the stack and are thus not of general use
SeeAlso: AX=5501h
--------l-2F5501-----------------------------
INT 2F U - DOS 5+ - ROM COMMAND.COM INTERFACE
        AX = 5501h
Return: ???
Note:   used to determine whether the caller is the first instance of ROM
          COMMAND.COM
SeeAlso: AX=5500h
--------R-2F5600-----------------------------
INT 2F - INTERLNK - INSTALLATION CHECK
        AX = 5600h
        DX = magic value FFFFh
        BL = instance number (00h = any, 01h = first loaded, etc.)
Return: AL = FFh if installed
            BL = instance number
            CX = version number (CL = major, CH = minor)
            DX = resident CS of driver, DX:0000h -> header (see #02845)
SeeAlso: AX=5601h,AX=5602h,INT 60/AX=0000h

Format of Interlnk device driver header:
Offset  Size    Description     (Table 02845)
 00h    DWORD   pointer to next driver, offset=FFFFh if last driver
 04h    WORD    device attributes (see #01647,#01648)
 06h    WORD    device strategy entry point
 08h    WORD    device interrupt entry point
 0Ah  8 BYTEs   character device name "NUL2    "
 12h 165 BYTEs  ???
 B7h 67 BYTEs   fully qualified Interlnk filename
 FAh  6 BYTEs   ???
100h    DWORD   pointer back to Interlnk filename at offset B7h
104h  8 BYTEs   ???
10Ch    BYTE    total number of redirected drives
10Dh    BYTE    first local drive number (0=A:)
10Eh    BYTE    printer redirection (0=no, 1=yes)
10Fh    BYTE    ???
110h  3 BYTEs   LPT1...3 status (0FFh=invalid)
113h 26 BYTEs   remote drive number (0=A:, 0FEh=unused) (refer to note below)
12Dh 26 BYTEs   always 0FEh ???
147h 26 BYTEs   always 0FFh ???
Note:   to obtain the remote drive number, subtract the value at offset 10Ch
          from the local drive number before indexing into the table at 113h
          (example: if local drives F, G, H are remote drives C, F, E then
          the first three bytes at offset 113h are 02h, 05h, 04h)
        for each instance of Interlnk, an extra device driver is loaded, but
          all have the same device name NUL2
SeeAlso: #01646 at INT 21/AH=52h
--------R-2F5601-----------------------------
INT 2F - INTERLNK - CHECK IF REDIRECTED DRIVE
        AX = 5601h
        DX = magic value FFFFh
        BH = drive number (0=A:)
        BL = instance number (00h=any, 01h=first loaded, etc.)
Return: (as for AL=00h if redirected drive)
SeeAlso: AX=5600h,AX=5601h
--------R-2F5602-----------------------------
INT 2F - INTERLNK - CHECK IF PORT IN USE
        AX = 5602h
        DX = magic value FFFFh
        BL = instance number (00h=any, 01h=first loaded, etc.)
        CX = base port address of COM / LPT port to check
Return: (as for AL=00h if port in use for a redirected drive)
SeeAlso: AX=5600h
--------d-2F5700-----------------------------
INT 2F U - IOMEGA DRIVERS - INSTALLATION CHECK
        AX = 5700h
        BX = program ID??? (0201h used by GUEST.EXE)
        DX = 496Fh ('Io')
Return: AL = status
            00h not installed
            FFh installed
SeeAlso: AX=5701h,AX=5710h,AX=5711h,AX=5712h
--------d-2F5701-----------------------------
INT 2F U - IOMEGA DRIVERS - ???
        AX = 5701h
        BX = program ID??? (0201h used by GUEST.EXE)
        DX = 496Fh ('Io')
Return: AX = 0001h
SeeAlso: AX=5700h,AX=5710h,AX=5711h,AX=5712h
--------d-2F5710-----------------------------
INT 2F U - IOMEGA DRIVERS - GET DRIVER INFORMATION???
        AX = 5710h
        BX = program ID??? (0201h used by GUEST.EXE)
        DX = 496Fh ('Io')
Return: AX = ??? (BX ORed with ???)
        BX = ??? (internal variable)
        CX = ??? (internal variable)
        DX = ??? (CX ORed with ???)
SeeAlso: AX=5700h,AX=5701h,AX=5711h,AX=5712h
--------d-2F5711-----------------------------
INT 2F U - IOMEGA DRIVERS - LOCK MEDIA IN DRIVE
        AX = 5711h
        BX = program ID??? (0201h used by GUEST.EXE)
        DX = 496Fh ('Io')
Return: CF clear if successful (storage medium in drive)
            AX = new lock count
        CF set on error (drive empty)
SeeAlso: AX=5700h,AX=5701h,AX=5710h,AX=5712h
--------d-2F5712-----------------------------
INT 2F U - IOMEGA DRIVERS - UNLOCK MEDIA IN DRIVE / EJECT
        AX = 5712h
        BX = program ID??? (0201h used by GUEST.EXE)
        DX = 496Fh ('Io')
Return: AX = new lock count (00h = unlocked)
Note:   if the lock count was already zero, the storage medium is ejected
          from the drive
SeeAlso: AX=5700h,AX=5701h,AX=5710h,AX=5711h
--------c-2F5758BX4858-----------------------
INT 2F U - Helix Multimedia Cloaking - CACHECLK - INSTALLATION CHECK
        AX = 5758h
        BX = 4858h ('HX')
        DX = 4443h ('DC')
        CX <> 5758h
Return: BX = 6878h if installed
        DX = 6463h if installed
           CX = version (CH=major,CL=minor)
Program: CACHECLK is a 'Cloaked' disk cache by Helix Software
Note:   returns with registers unchanged if CX=5758h on entry
SeeAlso: INT 16/AX=5758h/BX=4858h,INT 2F/AX=4310h"Cloaking"
--------X-2F5D00-----------------------------
INT 2F U - PCMCIA - AWARD PCDISK - GET INFO FROM DRIVER ???
        AX = 5D00h
Return: ES:BX -> ???
Note:   supported by Ventura Micro / Award PCDISK.EXE v1.02c PCMCIA/ATA driver
SeeAlso: AX=5D01h,INT 21/AX=440Dh"DOS 3.2+"
--------X-2F5D01-----------------------------
INT 2F U - PCMCIA - AWARD PCDISK - PUT INFO INTO DRIVER ???
        AX = 5D01h
        ES:BX -> ???
Return: nothing
Note:   supported by Ventura Micro / Award PCDISK.EXE v1.02c PCMCIA/ATA driver
SeeAlso: AX=5D00h,INT 21/AX=440Dh"DOS 3.2+"
--------s-2F60FFDL00-------------------------
INT 2F U - IPLAY v1.00b - INSTALLATION CHECK
        AX = 60FFh
        DL = 00h (function number)
        BX = 5344h ('SD')
        CX = 4D50h ('MP')
Return: AX = 4F4Bh ('OK') if installed
Program: IPLAY is the Inertia Player by Prime and Excalibur for .MODules
          (digitized music files)
Note:   in version 1.00b, any value for DL except 01h invokes this function
SeeAlso: AX=60FFh/DL=01h
--------s-2F60FFDL01-------------------------
INT 2F U - IPLAY v1.00b - GET DATA SEGMENT
        AX = 60FFh
        DL = 01h (function number)
        BX = 5344h ('SD')
        CX = 4D50h ('MP')
Return: AX = data segment
Program: IPLAY is the Inertia Player by Prime and Excalibur for .MODules
          (digitized music files)
SeeAlso: AX=60FFh/DL=00h
--------v-2F6282-----------------------------
INT 2F U - PC Tools v7.0+ VDEFEND, VSAFE, VWATCH, DATAMON - SET ??? ADDRESS
        AX = 6282h
        CX:DX -> ??? or 0000h:0000h
        DI = segment of ??? record (see #02846) or 0000h/FFFFh to ignore
Return: BX = 0062h
Note:   if CX:DX = 0000h:0000h on entry, the ??? address is not changed
          (DATAMON only)
SeeAlso: INT 13/AH=FAh"VSAFE",INT 21/AH=FAh"VDEFEND"

Format of VSAFE/VWATCH record:
Offset  Size    Description     (Table 02846)
 00h    DWORD   ???
 04h    WORD    offset of ??? in record's segment
                VSAFE 2.0 sets byte at +01h to 56h or 58h
                VWATCH 2.1 sets byte at +02h to 56h or 58h
 06h  2 BYTEs   ???
 08h    BYTE    ??? (01h/other)
--------v-2F6284BX0000-----------------------
INT 2F U - PC Tools v7-8 DATAMON, v9+ DPROTECT  - INSTALLATION CHECK
        AX = 6284h
        BX = 0000h
        CX = 0000h
Return: AX = segment of resident code
        BX = 5555h
        CX = 5555h
Note:   also supported by DOS 6 UNDELETE which is licensed from PC Tools
SeeAlso: AX=6284h/BX=0001h,INT 16/AX=FFA3h/BX=0000h
--------v-2F6284BX0001-----------------------
INT 2F U - PC Tools v7-8 DATAMON, v9+ DPROTECT - GET ???
        AX = 6284h
        BX = 0001h
        CX = 0001h
Return: AX:BX -> ??? data (see #02847)
        CX = BX
SeeAlso: AX=6284h/BX=0000h

Format of DPROTECT data for v9.0:
Offset  Size    Description     (Table 02847)
 00h  5 BYTEs   ???
 05h    WORD    resident code segment (may be segment of DWORD at +03h)
 07h    DWORD   -> FAR function to sound alert tone
        ???
--------v-2F6284BX0002-----------------------
INT 2F U - PC Tools v7-8 DATAMON, v9+ DPROTECT - GET OPTIONS
        AX = 6284h
        BX = 0002h
        CX = 0002h
Return: AX = options (see #02848)
        BX = ??? (0000h for v9)
        CX = AX
        DX = BX
Note:   also supported by DOS 6 UNDELETE which is licensed from PC Tools
SeeAlso: AX=6284h/BX=0000h,AX=6284h/BX=0003h

Bitfields for DATAMON/DPROTECT options:
Bit(s)  Description     (Table 02848)
 1      ???
 12     disabled
 13     using Delete Sentry
 14     using Delete Tracker
--------v-2F6284BX0003-----------------------
INT 2F U - PC Tools v7-8 DATAMON, v9+ DPROTECT - SET OPTION??? FLAGS
        AX = 6284h
        BX = 0003h
        CX = flags (see #02849)
        DX = flags
            bit 15: ???
Note:   v9 DPROTECT only checks bit 12 of CX, and ignores DX entirely
SeeAlso: AX=6284h/BX=0002h

Bitfields for DATAMON/DPROTECT CX flags:
Bit(s)  Description     (Table 02849)
 3      ???
 5      ???
 10     ???
 12     disable DATAMON/DPROTECT
--------v-2F6284BX0004-----------------------
INT 2F U - PC Tools v8 DATAMON, v9+ DPROTECT - ???
        AX = 6284h
        BX = 0004h
        CX = 0004h
Return: AX = 5555h
        BX = ??? (0800h)
        CX = ??? (FCCCh for v8, FCCBh for v9)
--------V-2F6400-----------------------------
INT 2F - SCRNSAV2.COM - INSTALLATION CHECK
        AX = 6400h
Return: AL = installation state
            00h not installed
            FFh installed
Program: SCRNSAV2.COM is a screen saver for PS/2s with VGA by Alan Ballard
SeeAlso: INT 10/AX=5555h,INT 14/AX=AA01h
Index:  screen saver;SCRNSAV2
--------N-2F7000-----------------------------
INT 2F - License Service API - INSTALLATION CHECK
        AX = 7000h
        CX = license server index (0000h to 001Fh)
Return: AL = status
            00h not installed
            FFh installed
Notes:  The License Service API is being maintained by Microsoft but is being
          supported by a large number of companies including Apple, Banyan,
          DEC, HP, Lotus, Microsoft, Novell, Software Publishers Association,
          and Wordperfect (not a complete list!)
        Each license service provider must search for the next free index
          slot to use
SeeAlso: AX=7001h,AX=7003h,AX=7004h,AX=7005h
--------N-2F7001-----------------------------
INT 2F - License Service API - REQUEST LICENSE
        AX = 7001h
        CX = license server index (0000h to 001Fh)
        DS:DX -> SLSREQUEST structure (see #02850)
Return: AX = status
            0000h success
            else  provider error code
        ES:BX = provider specific handle for the license context
SeeAlso: AX=7002h,AX=7004h,AX=7005h

Format of License Service SLSREQUEST structure:
Offset  Size    Description     (Table 02850)
 00h    DWORD   (ret) status code
 04h    DWORD   (ret) handle identifying context
 08h    DWORD   (call) address of Publisher string
 0Ch    DWORD   (call) address of Product string
 10h    DWORD   (call) address of Version string
 14h    DWORD   units required
 18h    DWORD   address of comment string
 1Ch    DWORD   address of SLSCHALLENGE structure (see #02851)

Format of License Service SLSCHALLENGE structure:
Offset  Size    Description     (Table 02851)
 00h    DWORD   algorithm (currently always 1)
 04h    DWORD   secret to be challenged (1-255)
 08h    DWORD   size of challenge in bytes (1-255)
 0Ch  N BYTEs   challenge data
--------N-2F7002-----------------------------
INT 2F - License Service API - RELEASE LICENSE
        AX = 7002h
        CX = license server index (0000h to 001Fh)
        DS:DX -> SLSRELEASE structure (see #02852)
        ES:BX = provider specific handle for the license context
Return: AL = status
            00h not installed
            FFh installed
SeeAlso: AX=7001h,AX=7005h

Format of License Service SLSRELEASE structure:
Offset  Size    Description     (Table 02852)
 00h    DWORD   handle indentifying license context
 04h    DWORD   total units consumed
 08h    DWORD   address of comment string
--------N-2F7003-----------------------------
INT 2F - License Service API - UPDATE
        AX = 7003h
        CX = license server index (0000h to 001Fh)
        DS:DX -> SLSUPDATE structure (see #02853)
        ES:BX = provider specific handle for the license context
Return: AL = status
            00h not installed
            FFh installed
SeeAlso: AX=7004h,AX=7005h

Format of License Service SLSUPDATE structure:
Offset  Size    Description     (Table 02853)
 00h    DWORD   (ret) status code
 04h    DWORD   (call) handle identifying license context
 08h    DWORD   (call) total units consumed
 0Ch    DWORD   additional units required
 10h    DWORD   address of comment string
 14h    DWORD   address of SLSCHALLENGE structure (see #02851)
--------N-2F7004-----------------------------
INT 2F - License Service API - GET ERROR
        AX = 7004h
        CX = license server index (0000h to 001Fh)
        DS:DX -> SLSGETERROR structure (see #02854)
        ES:BX = provider specific handle for the license context
Return: AL = status
            00h not installed
            FFh installed
SeeAlso: AX=7000h,AX=7001h

Format of License Service SLSGETERROR structure:
Offset  Size    Description     (Table 02854)
 00h    DWORD   (ret) status code
 04h    DWORD   handle identifying license context
 08h    DWORD   error code
 0Ch    DWORD   buffer size in bytes
 10h  N BYTEs   data buffer
--------N-2F7005-----------------------------
INT 2F - License Service API - QUERY LICENSE
        AX = 7005h
        CX = license server index (0000h to 001Fh)
        DS:DX -> SLSQUERY structure (see #02855)
        ES:BX = provider specific handle for the license context
Return: AL = status
            00h not installed
            FFh installed
SeeAlso: AX=7001h,AX=7002h

Format of License Service SLSQUERY structure:
Offset  Size    Description     (Table 02855)
 00h    DWORD   (ret) status code
 04h    DWORD   handle identifying license context
 08h    DWORD   information index
 0Ch    DWORD   buffer size in bytes
 10h  N BYTEs   data buffer
--------K-2F7041BX4B70-----------------------
INT 2F U - HP 200LX - KEY200 - INSTALLATION CHECK
        AX = 7041h
        BX = 4B70h
Return: BX = 7965h if keyboard remapper KEY200.COM installed
--------d-2F7200-----------------------------
INT 2F - SRDISK v1.30+ - INSTALLATION CHECK
        AX = 7200h
Return: AL = FFh if installed
            ES = segment of device driver header (see #02856)
Program: SRDISK is a freeware resizeable RAMdisk by Marko Kohtala
SeeAlso: AX=7201h

Format of SRDISK device driver header:
Offset  Size    Description     (Table 02856)
 00h 10 BYTEs   same as standard device driver header
                  (see #01646 at INT 21/AH=52h)
 0Ah    BYTE    number of subunits (drives) supported by driver
 0Bh  3 BYTEs   signature "SRD"
 0Eh  4 BYTEs   memory type string ("XMS "/"EMS ")
 12h  4 BYTEs   ASCII driver version string "N.NN"
 16h    BYTE    00h
 17h    BYTE    configuration format version (currently 00h or 01h)
 18h    WORD    offset of drive configuration data
SeeAlso: #01646
--------d-2F7201-----------------------------
INT 2F - SRDISK v2.02 - GET CODE/DATA SEGMENT
        AX = 7201h
Return: AL = FFh if installed
            ES = segment of device driver header (see #02856)
Program: SRDISK is a freeware resizeable RAMdisk by Marko Kohtala
SeeAlso: AX=7200h
--------N-2F7A00-----------------------------
INT 2F - Novell NetWare - LOW-LEVEL API (IPX) INSTALLATION CHECK
        AX = 7A00h
Return: AL = status
            00h not installed
            FFh installed
                ES:DI -> FAR entry point for routines accessed exclusively
                          through INT 7A in NetWare versions through 2.0a.
                          Call with same values as INT 7A
                ES:BX -> two bytes containing IPX major/minor version
                        (IPXODI v2.12; BX unchanged by older IPX drivers)
                CX = ES ???
SeeAlso: AX=7AFFh/BX=0000h,AX=D800h,INT 64"Novell",INT 7A"LOW-LEVEL API"
--------N-2F7A10-----------------------------
INT 2F U - Novell NetWare - TBMI v1.1+ - GET TBMI STATUS
        AX = 7A10h
Return: DH = major TBMI version number
        DL = minor TBMI version number (01h for v1.1)
        CX = segment address of TBMI resident part
        BX = status word of TBMI (see #02857)
Note:   TBMI is the Task-Switched Buffer Manager Interface
SeeAlso: AX=7A11h,AX=7A12h,AX=7A13h,AX=7A14h

Bitfields for NetWare TBMI status word:
Bit(s)  Description     (Table 02857)
 0      INT2F intercepted by TBMI
 1      INT7A intercepted by TBMI
 2      INT64 intercepted by TBMI
 3-14   reserved or unused ???
 15     outstanding task ID was detected
--------N-2F7A11-----------------------------
INT 2F U - Novell NetWare - TBMI v1.1+ - GET INT2F HANDLERS
        AX = 7A11h
Return: ES:BX -> old INT 2F handler
        DS:DX -> TBMI INT 2F handler
SeeAlso: AX=7A10h,AX=7A12h,AX=7A13h,AX=7A1Ah
--------N-2F7A12-----------------------------
INT 2F U - Novell NetWare - TBMI v1.1+ - GET INT64 HANDLERS
        AX = 7A12h
Return: ES:BX -> old INT 64 handler
        DS:DX -> TBMI INT 64 handler
SeeAlso: AX=7A10h,AX=7A11h,AX=7A13h
--------N-2F7A13-----------------------------
INT 2F U - Novell NetWare - TBMI v1.1+ - GET INT7A HANDLERS
        AX = 7A13h
Return: ES:BX -> old INT 7A handler
        DS:DX -> TBMI INT 7A handler
SeeAlso: AX=7A10h,AX=7A11h,AX=7A12h
--------N-2F7A14-----------------------------
INT 2F U - Novell NetWare - TBMI v1.1+ - GET STATISTICS
        AX = 7A14h
        CX = statistic to retrieve
            0000h available diagnostic functions???
                Return: CX = maximum available function??? (000Ch for v2.0)
            0001h buffers in use
                Return: CX = TBMI buffers currently in use
            0002h maximum buffers used
                Return: CX = maximum number of buffers ever in use
            0003h unavailable buffers
                Return: CX = count of unavailable TBMI buffers
            0004h old interrupt usage
                Return: CX = TBMI accesses to intercepted old vectors INT 2F,
                              INT 64, and INT 7A
            0005h far call usage
                Return: CX = TBMI accesses to IPX/SPX far call handler (not
                              including internal accesses)
            0006h task buffering
                Return: CX = TBMI task buffering status (enabled/disabled or
                              disable/enable switch count???)
            0007h current task ID
                Return: CX = TBMI current task ID number (0000h if ???)
            0008h outstanding ID count
                Return: CX = number of outstanding TBMI IDs
            0009h configured ECBs
                Return: CX = number of TBMI Event Control Blocks configured
            000Ah configured data ECBs
                Return: CX = number of TBMI data ECBs configured
            000Bh configured sockets
                Return: CX = number of TBMI sockets configured (from NETCFG)
            000Ch current sockets
                Return: CX = number of TBMI sockets currently in use
Return: BX = maximum supported subfunction (000Ch)
SeeAlso: AX=7A10h
--------N-2F7A15-----------------------------
INT 2F OU - Novell NetWare - TBMI v1.1 only - RESET ???
        AX = 7A15h
Return: BX = new value of ???
Desc:   set ??? to its default value
Note:   this call is a NOP under TBMI v2.0 (TBMI2)
SeeAlso: AX=7A17h
--------N-2F7A16-----------------------------
INT 2F OU - Novell NetWare - TBMI v1.1 only - ???
        AX = 7A16h
        CX = ???
        ???
Return: ???
Note:   this call is a NOP under TBMI v2.0 (TBMI2)
--------N-2F7A17-----------------------------
INT 2F OU - Novell NetWare - TBMI v1.1 only - ???
        AX = 7A17h
        ???
Return: BX = old value of ???
        CX = new value of ???
Note:   this call is a NOP under TBMI v2.0 (TBMI2)
SeeAlso: AX=7A15h
--------N-2F7A18-----------------------------
INT 2F U - Novell NetWare - TASKID v1.0 - INSTALLATION CHECK
        AX = 7A18h
Return: AL = FFh if installed
            BX = configuration flags (see #02858)
            CX = resident code segment
SeeAlso: AX=7A10h

Bitfields for NetWare TASKID configuration flags:
Bit(s)  Description     (Table 02858)
 0      INT 2F hooked
 3      INT 08 hooked
 other  unused
--------N-2F7A19-----------------------------
INT 2F U - Novell NetWare - TASKID v1.0 - GET INT 08 HANDLERS
        AX = 7A19h
Return: AL = FFh
        DS:DX -> TASKID INT 08 handler
        ES:BX -> original INT 08 handler
--------N-2F7A1A-----------------------------
INT 2F U - Novell NetWare - TASKID v1.0 - GET INT 2F HANDLERS
        AX = 7A1Ah
Return: AL = FFh
        DX:DX -> TASKID INT 2F handler
        ES:BX -> original INT 2F handler
SeeAlso: AX=7A11h,AX=7A19h
--------N-2F7A1B-----------------------------
INT 2F U - Novell NetWare - TASKID v1.0 - GET DIAGNOSTICS INFORMATION
        AX = 7A1Bh
        CX = desired information
            0000h supported functions
            0001h TASKID ID number
                Return: CX = ID number
            0002h set-ID count
                Return: CX = ID set count
Return: AL = FFh
        BX = highest supported subfunction number (0002h)
SeeAlso: AX=7A14h,AX=7A18h
--------N-2F7A1C-----------------------------
INT 2F U - Novell NetWare - TBMI v1.1+ - ???
        AX = 7A1Ch
        BP = ???
        CX:DX = ???
Return: AX = 70FFh
--------N-2F7A1D-----------------------------
INT 2F U - Novell NetWare - TBMI v1.1+ - ???
        AX = 7A1Dh
        ???
Return: ES = ???
        ???
        SI destroyed
--------N-2F7A1E-----------------------------
INT 2F U - Novell NetWare - TBMI v1.1+ - ???
        AX = 7A1Eh
        ES:SI -> ???
        ???
Return: ???
--------N-2F7A20BX0000-----------------------
INT 2F - Novell NetWare - Adv NetWare 4.0 DOS Requester - GET VLM CALL ADDRESS
        AX = 7A20h
        BX = 0000h
Return: AX = 0000h on success (installed)
            ES:BX -> far call address for DOS Requester (see #02859)
Notes:  the DOS Requester replaces the NetWare Shell (ANETx, NETx) on
          NetWare LAN's as of the release of Advanced NetWare 4.0 (1993).  It
          is backward compatible with NetWare 2.1x through 3.11 servers as
          well.  Note that there was a NetWare 4.0 in the early 1980's, which
          can cause confusion.
        this call is used as the installation check by VLM.EXE, which is the
          loader for all the modules of the DOS Requester
        .VLMs are standard old .EXE format executables whose normal entry point
          merely terminates to prevent loading from the command line (Novell's
          VLMs all return errorlevel 6).  The real entry point is found by
          looking at the VLM header at the beginning of the load image
          (see #02862)
Index:  installation check;NetWare 4.0 DOS Requester
SeeAlso: AX=7A20h/BX=0001h,AX=7A20h/BX=0002h

(Table 02859)
Call DOS Requester entry point with:
        STACK:  WORD    destination function
                WORD    destination VLM ID (see #02861)
                WORD    source VLM ID (0000h = application program)
        other registers (except BP) as appropriate for function
Return: AX = status code (0000h,8811h,8846h,8848h,8853h) (see #02860)
        ZF set if successful, clear on error
        other registers as appropriate for function
        STACK popped
        BP destroyed

(Table 02860)
Values for VLM status code:
 0000h  successful
 88xxh  error generated by requester
 8801h  invalid or non-attached connection handle
 8802h  drive in use (OS/2 only)
 8803h  cannot add CDS
 8804h  bad path
 8805h  error sending or receiving NCP packets
 8806h  unknown network error
 8807h  invalid server connection slot
 8808h  no connection slots available
 880Ah  no route to server
 880Bh  "BAD_LOCAL_TARGET" (OS/2 only)
 880Ch  too many request fragments
 880Dh  "CONNECT_LIST_OVERFLOW" (OS/2 only)
 880Eh  buffer overflow on receive
 880Fh  no connection to server
 8810h  no router found (OS/2 only)
 8811h  nonexistent function called
 8830h  internal server request attempted between two separate connections
 8831h  no primary connection set
 8833h  invalid buffer length
 8834h  invalid user name
 8835h  no local print spooler installed
 8836h  attempted function with invalid parameter
 8837h  failed to open configuration file (OS/2 only)
 8838h  no configuration file (OS/2 only)
 8839h  configuration file read failed (OS/2 only)
 883Ah  line too long in configuration file (OS/2 only)
 883Bh  configuration lines ignored (OS/2 only)
 883Ch  foreign resource
 883Dh  daemon already installed (OS/2 only)
 883Eh  print spooler already installed
 883Fh  local connection table already full
 8840h  configuration section not found (OS/2 only)
 8841h  invalid transport type
 8842h  TDS tag in use (OS/2 only)
 8843h  TDS out of memory (OS/2 only)
 8844h  called TDS function with invalid tag
 8845h  TDS write was truncated
 8846h  called partially asynchronous function while it was busy
 8847h  unable to find any responding servers
 8848h  non-loaded or nonexistent VLM called
 8849h  network drive already mapped
 884Ah  attempted map to local drive which was already in use
 884Bh  no more drives available for mapping
 884Ch  device is not redirected
 884Dh  no more SFT entries (too many handles)
 884Eh  unable to unload
 884Fh  connection entry was already in use
 8850h  too many reply fragments
 8851h  name table already full
 8852h  socket not open
 8853h  memory management error
 8854h  SFT III switch occurred in mid-transfer
 8855h  preferred server was not found (alternate returned)
 8856h  device not recognized
 8857h  bad network byte
 88A0h  memory allocation error
 88A1h  connection timeout failure
 88A2h  transport: bad request
 88A3h  specified transport not installed
 88A4h  unable to open connection with specified parameters
 88A6h  unsupported function
 88A7h  no such task
 88A8h  too many tasks
 88A9h  version mismatch
 88AAh  request cancelled
 88ABh  invalid NDS name
 88ACh  unable to perform operation while logged into NDS
 88ADh  requester not available for use
 88AEh  MacIPX not configured properly
 88AFh  no servers found
 88B0h  no volume or session associated with identifier
 88B1h  not a NetWare volume
 88B2h  MacIPX version incompatible with Requester
 88B4h  MacIPX not open
 88B5h  insufficient stack
 88B6h  client API already initialized
 88B7h  checksums required by client are not available
 88B8h  packet signing required by client are not available
 88B9h  server requires checksum
 88BAh  server requires packet signing
 88BBh  already logged in
 88BCh  negotiated checksums but connection timed out
 89xxh  error generated by server
        low byte = return code from server (see also #01927,#01961)
 8900h  server successful
 8901h  out of disk space
 897Eh  NCP boundary check failed
 897Fh  ???
 8980h  lock failed; file in use
 8981h  out of handles
 8982h  no open privileges
 8983h  hard (non-correctable) I/O error
 8984h  no creation privileges
 8985h  no create/delete privileges
 8986h  attempted to create a file which already exists read-only
 8987h  filename error during creation (wildcards in name)
 8988h  invalid file handle
 8989h  no search privileges
 898Ah  no deletion privileges
 898Bh  no rename privileges
 898Ch  no modify privileges
 898Dh  some affected files are in use
 898Eh  all affected files are in use
 898Fh  some affected files are read-only
 8990h  all affected files are read-only; volume read-only
 8991h  some files could not be renamed because target names already exist
 8992h  all affected names exist
 8993h  no read privileges
 8994h  no write privileges
 8995h  file detached
 8996h  server out of memory
 8997h  no disk space for spool file
 8998h  disk map error; volume does not exist
 8999h  directory full
 899Ah  attempt to rename across volumes
 899Bh  bad directory handle
 899Ch  invalid path; no more trustees
 899Dh  no directory handles
 899Eh  bad filename
 899Fh  directory active
 89A0h  directory not empty
 89A1h  directory I/O error
 89A2h  I/O lock error
 89A3h-89A5h ???
 89A6h  auditing is active
 89A7h  auditing version error
 89A8h  no auditing rights
 89A3h-89BEh ???
 89BFh  invalid name space
 89C0h  no account privileges
 89C1h  no account balance
 89C2h  credit limit exceeded
 89C4h  account disabled
 89C5h  login lockout (intruder detection activated)
 89C6h  no console rights
 89C7h-89CFh
 89D0h  queue error
 89D1h  no queue
 89D2h  no queue server
 89D3h  no queue rights
 89D4h  queue full
 89D5h  no queue job
 89D6h  no job rights; unencrypted password
 89D7h  queue servicing error; duplicate password; bad account
 89D8h  queue not active; password too short
 89D9h  station not queue server; maximum logins exceeded
 89DAh  queue halted; bad login time
 89DBh  maximum queue servers; unauthorized login station
 89DCh  account disabled or expired
 89DEh  password expired (all grace logins used up)
 89DFh  password expired but login allowed (grace login)
 89E0h-89E6h ???
 89E7h  no disk track
 89E8h  property is not an item property; write to group
 89E9h  member exists
 89EAh  no such member
 89EBh  property is not a set property
 89ECh  no such set
 89EDh  property exists
 89EEh  object exists
 89EFh  illegal name
 89F0h  illegal wildcard
 89F1h  invalid bindery security level
 89F2h  not allowed to read object
 89F3h  not allowed to write/rename object
 89F4h  not allowed to delete object
 89F5h  not allowed to create object
 89F6h  not allowed to delete property
 89F7h  not allowed to create property; attempt to use non-local drive
 89F8h  not allowed to write property; already attached to server
 89F9h  not allowed to read property; no free connection slots
 89FAh  temporary remap error; no more server slots
 89FBh  no such property; invalid parameters
 89FCh  no such object; internet packet request canceled; unknown file server
 89FDh  bad station number; lock collision
 89FEh  directory locked; bindery locked; timeout
 89FFh  general error; hard error; lock error
Note:   some server-generated error codes have multiple interpretations; use
          the one appropriate to the failing call

(Table 02861)
Values for VLM identifier:
 0001h  VLM.EXE         Virtual Loadable Modules manager (see also #02864)
 0010h  CONN.VLM        connection table manager (see also #02867)
 0020h  TRAN.VLM        transport protocol multiplexor (see also #02871)
 0021h  IPXNCP.VLM      transport protocol implementation using IPX (see #02873)
 0022h  TCPNCP.VLM      TCP/IP transport
 0030h  NWP.VLM         NetWare protocol multiplexor (see also #02875)
 0031h  BIND.VLM        bindery
 0032h  NDS.VLM         NetWare Directory Services (see also #02877)
 0033h  PNW.VLM         Personal NetWare
 0034h  RSA.VLM         RSA encryption for directory services re-authentication
 0040h  REDIR.VLM       DOS redirector (see also #02879)
 0041h  FIO.VLM         file I/O (see also #02882)
 0042h  PRINT.VLM       printer redirector (see also #02884)
 0043h  GENERAL.VLM     misc functions for NETx and REDIR (see also #02888)
 0050h  NETX.VLM        NetWare shell compatibility (see also #02890)
 0060h  AUTO.VLM        auto-reconnect/auto-retry
 0061h  SECURITY.VLM    enhanced security module (see #02892)
 0100h  NMR.VLM         NetWare management responder
 09F2h  DRVPRN.VLM      Desktop SNMP Services - Drive/Printer Mappings
 09F5h  SAA.VLM         SAA client API for Netware
 09F6h  IPXMIB.VLM      SNMP IPX-monitoring Module???
 09F7h  PNWMIB.VLM      Personal Netware SNMP Instrumentation Module
 09F8h  PNWTRAP.VLM     Personal Netware SNMP Trap Module
 09F9h  MIB2PROT.VLM    MIB-II Protocol Groups
 09FAh  MIB2IF.VLM      MIB-II Interfaces Group
 09FBh  NVT.VLM         ???
 09FCh  WSTRAP.VLM      Desktop SNMP Services - Trap Module
 09FDh  WSREG.VLM       Desktop SNMP Services - Registration Module
 09FEh  WSASN1.VLM      Desktop SNMP Services - ASN.1 Module
 09FFh  WSSNMP.VLM      Desktop SNMP Services - Agent Module

Format of VLM header:
Offset  Size    Description     (Table 02862)
 00h    DWORD   -> initialization entry point
 04h    DWORD   -> VLM API entry point
 08h    DWORD   -> ??? entry point
 0Ch    DWORD   -> ??? entry point
 10h    DWORD   -> ??? entry point
        ...
 var    DWORD   00000000h (end of entry point list)
      4 BYTEs   signature "NVlm"
        WORD    VLM identifier (see #02861)
---v1.20+ ---
 1Eh    WORD    ???
 20h    WORD    Transient Switch Count
 22h    WORD    VLM Call Count
 24h    WORD    Offset ControlBlocks (See #02863)
 26h    WORD    Current VLMID
 28h    BYTE    Memory Type
                00h=Conventional 02h=EMS 04h=XMS
 29h    BYTE    Modules Loaded
 2Ah    WORD    BlockId
 2Ch    WORD    Transient Block
 2Eh    WORD    Global Segment
 30h  3 DWORDs  pointers to AsyncQueue head, tail, and s???
 3Ch  3 DWORDs  pointers BusyQueue head, tail, and s???
 48h    WORD    ReEntrance Level
 4Ah    WORD    Full Map Count
 4Ch    WORD    ???
 4Eh 80 BYTEs   ASCIZ configuration file filename
Note:   the number of entry points in the header is reported as "Func" in the
          VLM /D display.

Format of VLM Control Block for VLM v1.20 [array]:
Offset  Size    Description     (Table 02863)
 00h    WORD    Flag
 02h    WORD    VLM Identifier (See #02861)
 04h    WORD    Func
 06h    WORD    Maps
 08h    WORD    number of times called
 0Ah    WORD    ???
 0Ch    WORD    Transient Segment
 0Eh    WORD    Global Segment
 10h    WORD    Address Low
 12h    WORD    Address High
 14h    WORD    TSegSize
 16h    WORD    GSegSize
 18h    WORD    SSegSize
 1Ah    BYTE    VLMName[9] ASCIZ
Note:   this information is shown in VLM /d under the dashed line. There are
          as many 35-byte blocks as modules loaded
SeeAlso: #02862

(Table 02864)
Call VLM Manager (VLM.EXE, ID 0001h) with:
Func    Description/Registers
 01h    VLM Notify
        BX = function
            0000h get version
                Return: AX = status (see #02860)
                        BX = major version of VLM supported (0001h)
                        CX = minor version of VLM supported (0000h)
 03h    VLM Statistics
        CX = length of buffer
        ES:DI -> buffer for statistics (see #02865)
        Return: AX = status (0000h if successful)
                buffer filled if successful
 04h    VLM internal use
        BX = function
            0000h get interrupt vector (calls INT 21/AH=35h)
            0001h begin critical section (calls INT 2F/AX=1681h)
            0002h end critical section (calls INT 2F/AX=1682h)
            0003h ???

Format of VLM.EXE statistics:
Offset  Size    Description     (Table 02865)
 00h    WORD    size of statistics record in bytes (including this word)
 02h    WORD    number of times a VLM has been mapped into memory
 04h    WORD    number of times a VLM has been called
 06h    WORD    offset of vcbArray buffer
 08h    WORD    VLM ID of VLM currently mapped into memory
 0Ah    BYTE    memory type: conventional/EMS/XMS
 0Bh    BYTE    number of loaded VLMs
 0Ch    WORD    EMS/XMS handle or 0000h if conventional memory
 0Eh    WORD    start segment for conventional memory swap
 10h    WORD    segment for global memory, or 0000h if conventional memory
 12h 12 BYTEs   queue structure for asynchronous calls (see #02866)
 1Eh 12 BYTEs   queue structure for synchronous calls (see #02866)
 2Ah    WORD    current re-entrance level
 2Ch    WORD    number of times EMS/XMS map-out performed
 2Eh    BYTE    stack switch control
 2Fh    BYTE    flag: nonzero if switcher loaded
 30h 80 BYTEs   pathname of configuration file
SeeAlso: #02864

Format of VLM.EXE queue structure:
Offset  Size    Description     (Table 02866)
 00h    DWORD   queue head (initially 00000000h)
 04h    DWORD   queue tail (initialized to be same as head)
 08h    WORD    current queue size (number of nodes in queue)
 0Ah    WORD    maximum queue size (in nodes)
SeeAlso: #02865

(Table 02867)
Call Connection Manager (CONN.VLM, ID 0010h) with:
Func    Description/Registers
 01h    Conn Get Version
        BX = function
            0000h get version
                Return: AX = status (see #02860)
                        BX = major version of VLM supported (0001h)
                        CX = minor version of VLM supported (0000h)
 03h    Conn Statistics
        CX = length of buffer
        ES:DI -> buffer for connection statistics (see #02868)
        Return: AX = status (0000h successful)
 04h    Conn Alloc Handle
        Return: AX = status (0000h successful)
                CX = connection handle
 05h    Conn Validate Handle
        CX = connection handle
        Return: AX = 0000h if valid handle
 06h    Conn Free Handle
        CX = connection handle
        Return: AX = status (0000h successful)
 07h    Conn Get Entry Field
        BH = connection parameter (see #02870)
        CX = connection handle
        DX = value if BH is non-array parameter
        DH = offset in array if BH is array parameter
        DL = number of bytes to copy if BH is array
        ES:DI -> return buffer if BH is array
        Return: AX = 0000h if successful
                DL/DX = value if non-array parameter
                DH = maximum number of bytes in buffer if array parameter
                DL = number of bytes copied if array
                BX destroyed
 08h    Conn Set Entry Field
        BH = connection parameter (see #02870)
        CX = connection handle
        DL/DX = value if BH is non-array parameter
        DH = offset in array if BH is array parameter
        DL = number of bytes to copy if BH is array
        DS:SI -> buffer if BH is array
        Return: AX = 0000h if successful
                DH = maximum number of bytes in buffer
                DL = number of bytes copied
                BX destroyed
 09h    Conn Reset Entry Field
        BH = connection parameter (see #02870)
        CX = connection handle
        Return: AX = 0000h if successful
                BX,DX destroyed
 0Ah    Conn Lookup Handle
        BL = lookup type (00h equal, 40h not equal)
        BH = connection parameter (see #02870)
        CX = connection handle, 0000h if first
        DL/DX = value if BH is non-array parameter
        DH = offset in array if BH is array parameter
        DL = number of bytes to copy if BH is array
        DS:SI (ES:DI???) -> buffer if BH is array
        Return: AX = 0000h if successful
                CX = handle matching given parameters
 0Dh    Conn Name Lookup
        CX = connection handle
        ES:DI -> 49-byte buffer for server name or 0000h:0000h
        Return: AX = 0000h if successful
                BX = length of server name
                ES:DI buffer filled if pointer not 0000h:0000h
 0Eh    Conn Name To Handle
        DS:SI -> uppercased server name
        CX = length of server name, 0000h if ASCIZ name
        Return: AX = error code or 0000h if successful
                    CX = connection handle if successful
 0Fh    Conn Get Num Connections
        Return: AX = status (0000h if successful)
                DX = number of connections
                CX = segment of connection table
                    first entry in table (See #02869)

Format of VLM connection statistics:
Offset  Size    Description     (Table 02868)
 00h    WORD    total length of statistics record (including this word)
 02h    WORD    number of connection handles allocated
 04h    WORD    average name length (configured in NET.CFG)
 06h    WORD    maximum number of tasks (configured in NET.CFG)
 08h    WORD    number of failed "allocate handle" calls
 0Ah    WORD    number of failed "add name" calls
 0Ch    WORD    number of failed task calls
Note:   some versions of the NetWare requester reportedly do not implement
          this correctly
SeeAlso: #02867

Format of NetWare VLM Connection Table [array]:
Offset  Size    Description     (Table 02869)
 00h    WORD    Protocol VLMid    0032(NDS) 0031(BIND)          Func 07 equiv.
                                  0033(PNW) 0000(unused)       BH=01h
 02h    BYTE    (connection status)
                bit 6: connection locked                       BH=16h
                bit 5: authenticated                           BH=03h
                bit 4: permanent                               BH=02h
                bit 2: broadcast msg waiting                   BH=12h
 03h    BYTE    (connection capabilities)
                bit 5: Large Internet Packets                  none
                bit 3: Packet Burst Reset                      BH=07h
                bit 2: Max I/O                                 BH=06h
                bit 1: SFT3 change                             BH=05h
                bit 0: Packet Burst Support                    BH=04h
 04h    WORD    reference count                                BH=09h
 06h    WORD    soft resource count                            BH=15h
 08h    BYTE    NCP Order Number                               BH=0Eh
 09h    BYTE    Server security options                        BH=14h
                bit 0: CRC enabled
                bit 1: packet signing required
                bit 5: packet signing enabled
 0Ah    BYTE    OS Major Version                               BH=08h
 0Bh    BYTE    OS Minor Version                               BH=08h
 0Ch    WORD    Hops to Server                                 BH=0Ah
 0Eh    WORD    Maximum Packet Size for this connection        BH=0Bh
 10h    WORD    LIP Parameters                                 BH=13h
 12h    WORD    NCP Request Type                               BH=10h
 14h    BYTE    NCP Sequence                                   BH=0Ch
 15h    WORD    Connection Number                              BH=0Dh
 17h    BYTE    ???                                            none
 18h    WORD    Transport VLMid 21(IPXNCP) 22(TCPNCP)          BH=0Fh
 1Ah    BYTE    Node Address[4]                                BH=11h
 1Eh    BYTE    Network[6]                                     BH=11h
 24h    BYTE    Socket[2]                                      BH=11h
 26h    BYTE    Local Target[6]                                BH=11h
 2Ch    WORD    Round Trip Time                                BH=11h
 2Eh    WORD    ???                                            none
SeeAlso: #02867

(Table 02870)
Values for NetWare Connection Manager CEI (Connection Entry Information):
 number flags   description
 00h    FR      error
 01h    WL      VLM id of transport protocol (NDS/BIND/PNW)
                00h = wildcard
 02h    FR      permanent flag (01h if connection is permanent)
 03h    F       authenticated flag (01h if connection is authenticated)
 04h    F       packet burst supported
 05h    FR      SFT3 change status
 06h    FR      connection needs maximum I/O transmission
 07h    FR      packet burst reset needed
 08h    W       server version
 09h    W       reference count (tasks using connection, 00h = dynamic)
 0Ah    W       distance to server associated with connection
 0Bh    W       maximum packet size supported by transport protocol
 0Ch    B       NCP sequence number
 0Dh    W       connection number
 0Eh    B       NCP order number
 0Fh    WL      VLM id for transport protocol
                00h = wildcard, 21h = IPX, 22h = TCP
 10h    W       NCP request type
 11h    A       transport specific buffer
                12 byte server address
                6 byte  router address
                2 byte round trip time
 12h    FR      broadcast message waiting
 13h    W       large internet packets supported
 14h    B       security options
                bit 0: CRC enabled
                bit 1: packet signing enabled
                bit 5: packet signing active
 15h    W       soft resource count
 16h    FR      connection locked
Note:   flag meanings
            F=flag value
            B=byte value
            W=word value
            A=array
            R=resettable
            L=settable only before authentication
            others=read only
SeeAlso: #02867

(Table 02871)
Call TRAN.VLM (VLM ID 0020h) with:
Func    Description/Registers
 01h    TRAN Get Version
        BX = function
            0000h get version
                Return: AX = status (see #02860)
                        BX = major version of VLM supported (0001h)
                        CX = minor version of VLM supported (0000h)
 03h    TRAN Statistics
 06h    TRAN Request Reply (see INT 21/AH=F2h)
        AL = NCP request code (see #02095 at INT 21/AH=F2h)
        BH = error handler flag
            00h default error handler
            01h return network errors to caller
            02h handle network errors in requester
        BL = request list length (max 5 fragments) (see #02872)
        CX = connection handle
        DH = 00h (reserved)
        DL = reply list length (max 5 fragments) (see #02872)
        DS:SI -> address list (each element is DWORD address + WORD length)
        ES:DI -> address list
        Return: AX = error code, 0000h if successful (see #02860)
                BX,DX destroyed
                ES:DI buffer filled with reply packet fragments
 08h    TRAN Schedule/Cancel Event
        BX = subfunction
            0000h schedule event
                AX = number of timer ticks to delay before calling function
                ES:SI -> event control block (including valid call address)
            0001h cancel event
                ES:SI -> event control block (including call address)
        Return: AX = status (0000h = successful) (see #02860)
 09h    TRAN Get Max Phys Size
        BX = subfunction
            00h get maximum node size
                Return: AX = status (0000h = successful) (see #02860)
                        BX = maximum supported physical packet size
                        DX = size of protocol header
                        SI = RequestReply socket number
            01h get maximum route size to specified server
                CX = connection handle for route to be checked
                Return: AX = status (0000h = successful) (see #02860)
                        DX = maximum supported packet size for current route
 0Ah    TRAN Broadcast Mux
        BX = subfunction
            0001h get stored broadcast (Personal NetWare)
                ES:DI -> 60-byte buffer for counted ASCIZ message string
        Return: AX = status (0000h = successful) (see #02860)

Format of TRAN.VLM request/reply fragment descriptor (array):
Offset  Size    Description     (Table 02872)
 00h    DWORD   address of buffer
 04h    WORD    length of buffer

(Table 02873)
Call IPXNCP.VLM (VLM ID 0021h) with:
Func    Description/Registers
 01h    IPX Get Version
        BX = function
            0000h get version
                Return: AX = status (see #02860)
                        BX = major version of VLM supported (0001h)
                        CX = minor version of VLM supported (0000h)
 03h    IPX Statistics
        CX = length of buffer
        ES:DI -> buffer for statistics (see #02874)
        Return: AX = status (see #02860)
 06h    IPXNCP Request Reply???
        functionally equivalent to Tran Request Reply???

Format of NetWare IPX statistics:
Offset  Size    Description     (Table 02874)
 00h    WORD    size of statistics, including this word
 02h    DWORD   number of TRAN Request Reply calls made
 06h    WORD    number of user aborts
 08h    WORD    number of user retries
 0Ah    WORD    IPX receive errors
 0Ch    WORD    IPX send errors
 0Eh    WORD    number of unrecognized responses
 10h    WORD    number of bad connection numbers in requests
 12h    WORD    number of bad sequence responses
 14h    WORD    receive buffer overflows
 16h    WORD    number of times route to attached server was lost
 18h    WORD    number of times server responded "busy"
 1Ah    WORD    number of unknown "NCPRepCompCode" values
 1Ch    WORD    number of bad connection numbers in responses
 1Eh    WORD    padding for NETX compatibility
 20h    WORD    padding for NETX compatibility
 22h    WORD    number of attach requests to server without route
 24h    WORD    number of times server responded to attach without slot
 26h    WORD    number of times a server went down during a request
 28h    DWORD   same-server optimizations
 2Ch    WORD    local route changes
 2Eh    WORD    IPX CRC errors
 30h    WORD    number of user fails
 32h    BYTE    flag: CRCs enabled
 33h    BYTE    flag: LIP enabled
 34h    BYTE    flag: configurable NET error handler
SeeAlso: #02873

(Table 02875)
Call NWP.VLM (VLM ID 0030h) with:
Func    Description/Registers
 01h    NWP Get Version
        BX = function
            0000h get version
                Return: AX = status (see #02860)
                        BX = major version of VLM supported (0001h)
                        CX = minor version of VLM supported (0000h)
 03h    NWP Statistics
        CX = size of buffer for statistics
        ES:DI -> buffer for statistics (see #02876)
        Return: AX = status (see #02860)
 04h    NWP Connect
        DL = resource count state (NDS connections only)
        CX = proposed connection handle (not yet connected to server)
        DS:SI -> 48-byte server name (NUL-terminated if less than 48 bytes)
        Return: AX = status (0000h = successful) (see #02860)
                CX = actual connection handle to use
        Note:   if the returned handle differs from the proposed handle, the
                  proposed handle should be freed
 05h    NWP Disconnect
        DL = ???
            00h global disconnect -- clear all resources associated with conn.
            01h destroy connection -- send disconnect request to server
        CX = connected connection handle
        Return: AX = status (0000h = successful) (see #02860)
 06h    NWP Attach
        DL = resource count state (NDS connections only)
        CX = connection handle (allocated by not yet attached to server)
        DS:SI -> full network address for desired server
        Return: AX = status (0000h = successful) (see #02860)
 08h    NWP Login
        BX = object type
        CX = connection handle (must be connected) to be authenticated
        DS:SI -> ASCIZ user name (max 48 bytes)
        ES:DI -> ASCIZ user password (max 128 bytes)
        Return: AX = status (0000h = successful) (see #02860)
 09h    NWP Logout
        CX = connection handle
        Return: AX = status (0000h = successful) (see #02860)
 0Ah    NWP Get Bindery Object/Get Message Handler
        BX = subfunction
            0002h set workstation's broadcast message mode
                DL = message mode
                    00h client hold client message set on, retrieve/display on
                    01h client hold client message set off, retr/display on
                    02h client hold client message set on, retrieve/dislay off
                    03h client hold client message set off, retr/display off
                    04h get current message mode
                    05h set broadcast callback
                        CX:SI -> callback handler
                    06h get broadcast timeout
                    07h set broadcast timeout
                        CX = timeout in timer ticks (0000h = never)
                CX = connection handle, or 0000h to notify all servers
            0003h get object ID for object name
                AX = object type (big-endian)
                CX = connection handle
                DX = length of object name
                ES:DI -> uppercased ASCIZ object name
                Return: AX = status (see #02860)
                        DX:BX = object ID
            0004h get object name for object ID
                DX:SI = object ID
                CX = connection handle for server which is to do the lookup
                ES:DI -> 48-byte buffer for object name
                Return: AX = status (see #02860)
            0005h retrieve broadcast message
 0Ch    NDS Fragment Request (passed to NDS.VLM's function 0Ch) (see #02877)
        AX = verb or request type
        CX = connection handle
        DS:SI -> request structure (DWORD data address followed by WORD size)
        ES:DI -> buffer for reply structure (same format as request)
        Return: AX = status (0000h = successful) (see #02860)
 0Eh    NWP Ordered Send To All
        AL = NCP request code
        AH = inverse request code (FFh if none) to back out from failures
        BX = number of fragments in request list
        DX = number of fragments in reply list buffer
        DS:SI -> request fragment list
        ES:DI -> reply fragment list
        Return: AX = status (see #02860)
                BX, CX, DX destroyed
        Note:   the available functions are described under INT 21/AX=F2xxh
 0Fh    NWP Preferred Handler
        BX = subfunction
            0000h get preferred connection name
                DX = VLM ID (NDS/BIND/PNW)
                ES:DI -> 49-byte buffer for connection name
                Return: ES:DI buffer filled
            0001h set preferred connection name
                DX = VLM ID (NDS/BIND/PNW)
                CX = length of connection name (may be 0000h, max 48)
                DS:SI -> name of preferred connection
            0002h get preferred connection ID
                DX = VLM ID (NDS/BIND/PNW)
                Return: AX = status (see #02860)
                        CX = connection handle if successful
            0003h get server address
                CX = connection handle or 0000h
                DS:SI -> ASCIZ name to be resolved
                ES:DI -> 12-byte buffer for server address
 10h    NWP Security???
        BX = subfunction
            0001h get security flags (see also INT 21/AX=B301h)
                Return: BX:CX indicates signature level
                                = 0100h:0000h if signature level=0
                                = 0300h:0000h if signature level=1
                                = 0302h:0000h if signature level=2
                                = 0302h:0202h if signature level=3
            0002h create session keys (see also INT 21/AX=B302h)
                CX = server connection handle
                DS:SI -> 24-byte input buffer
            0004h set security flags (see also INT 21/AX=B304h)
                BL:CL = new flags
            0006h renegotiate security level (see also INT 21/AX=B306h)
                CX = server connection number (01h-08h)

Format of NWP.VLM statistics:
Offset  Size    Description     (Table 02876)
 00h    WORD    size of statistics record (including this byte)
 02h    BYTE    flag: Large Internet Packets enabled
 03h    BYTE    bit flags: enabled security features
 04h    BYTE    bit flags: preferred security features
 05h    BYTE    bit flags: required security features
 06h    BYTE    minimum level of required security
SeeAlso: #02875

(Table 02877)
Call NDS.VLM (VLM ID 0032h) with:
Func    Description/Registers
 01h    NDS Get Version
        BX = function
            0000h get version
                Return: AX = status (see #02860)
                        BX = major version of VLM supported (0001h)
                        CX = minor version of VLM supported (0000h)
 03h    NDS Statistics
 06h    NDS Attach
        CX = allocated connection handle
        DS:SI -> server address
 08h    NDS Fragment Requst
        Return: AX = 8836h (invalid parameter)
        Note:   this function was documented but does not work
 0Ch    NDS context
        BX = subfunction
            0000h get default name context
                CX = length of buffer for default context
                ES:DI -> buffer to receive name
                Return: ES:DI buffer filled
            0001h set default context
                CX = length of new default context name
                DS:SI -> context name
            0002h read from TDS
                CX = reply buffer length
                DX = 0110h ???
                SI = offset in TDS
                ES:DI -> reply buffer
            0003h write to TDS
            0005h "NWDSChangeResourceConnection/Lock Connection"
                CX = connection handle
                DL = subfunction (00h-09h)
                    04h = NWDSChangeResourceOnConnection
                    07h = NWDSChangeResourceOnConnection
                    08h = NWDSLockConnection
            0006h NDS change connection state (internal)
                CX = connection handle
                AL = 00h or 01h
            0007h "NWDSSetMonitoredConnection"
                AX = subfunction
                    0001h get monitored connection
                        Return: CX = connection handle???
                    0002h set monitored connection
                        CX = connection handle???
            0008h send NDS request
                AX = NDS function
                CX = connection handle
                DS:SI -> request buffer descriptor (see #02878)
                ES:DI -> reply buffer descriptor (see #02878)
            000Ah set NDS CEI Info
                DL = buffer length
                DS:SI -> input buffer

Format of NetWare NDS request/reply buffer descriptor:
Offset  Size    Description     (Table 02878)
 00h    DWORD   -> buffer
 04h    WORD    length of buffer in bytes
SeeAlso: #02877

(Table 02879)
Call REDIR.VLM (VLM ID 0040h) with:
Func    Description/Registers
 01h    Redir Get Version
        BX = function
            0000h get version
                Return: AX = status (see #02860)
                        BX = major version of VLM supported (0001h)
                        CX = minor version of VLM supported (0000h)
 03h    Redir Statistics
        CX = length of buffer
        ES:DI -> buffer for statistics (see #02880)
        Return: AX = status (0000h if successful) (see #02860)
                buffer filled if successful
 04h    Redir Build SFT (see INT 21/AH=B4h"NetWare")
        CX = connection handle
        ES:DI -> SFT build request (see #02881)
        Return: AX = 0000h if successful
                    BX = DOS file handle
 05h    Redir DOS To NW Handle
        BX = DOS file handle
        ES:DI -> 11-byte buffer for NetWare handle
 08h    Redir Specific
        BX = 0000h get item
            DS:SI -> ASCIZ string "LPTx" (x='1'-'9') or drive spec ("d:")
            ES:DI -> 512-byte reply buffer for
                      "\\server\resource",00h,"path",00h
        Return: AX = status (0000h if successful) (see #02860)

Format of REDIR.VLM statistics:
Offset  Size    Description     (Table 02880)
 00h    WORD    size of statistics record (including this word)
 02h    WORD    number of network errors causing a critical error (see INT 24)
 04h    WORD    number of drives currently redirected
SeeAlso: #02879

Format of NetWare SFT build request:
Offset  Size    Description     (Table 02881)
 00h  6 BYTEs   NetWare handle
 06h    WORD    reserved for internal use
 08h 14 BYTEs   ASCIZ filename
 16h    BYTE    DOS file attributes
                bit 7: file is shareable
 17h    BYTE    reserved
 18h    LONG    file size
 1Ch    WORD    creation date
 1Eh    WORD    last access date or 0000h
 20h    WORD    last update date or 0000h
 22h    WORD    last update time or 0000h

(Table 02882)
Call File I/O FIO.VLM (VLM ID 0041h) with:
Func    Description/Registers
 01h    FIO Get Version
        BX = function
            0000h get version
                Return: AX = status (see #02860)
                        BX = major version of VLM supported (0001h)
                        CX = minor version of VLM supported (0000h)
 03h    FIO Statistics
        CX = length of buffer
        ES:DI -> buffer for statistics (see #02883)
        Return: AX = status (0000h if successful)
                buffer filled if successful
 04h    FIO Remote Copy

Format of NetWare FIO statistics:
Offset  Size    Description     (Table 02883)
 00h    WORD    length of statistics record (including this word)
 02h    WORD    number of read requests
 04h    WORD    number of write requests
 06h    WORD    number of cache read hits
 08h    WORD    number of cache write hits
 0Ah    WORD    number of cacheable files with free blocks
 0Ch    WORD    number of cacheable files without free blocks
 0Eh    WORD    number of standard read requests
 10h    WORD    number of standard write requests
 12h    WORD    number of burst read requests
 14h    WORD    number of burst write requests
 16h    BYTE    flag: cache writes enabled
 17h    BYTE    flag: true commits enabled
 18h    WORD    number of cache blocks
 1Ah    WORD    size of a cache buffer
 1Ch    WORD    number of ECBs for packet bursts (0000h if bursts disabled)
SeeAlso: #02882

(Table 02884)
Call PRINT.VLM (VLM ID 0042h) with:
Func    Description/Registers
 01h    Print Get Version
        BX = function
            0000h get version
                Return: AX = status (see #02860)
                        BX = major version of VLM supported (0001h)
                        CX = minor version of VLM supported (0000h)
 03h    Print Statistics
        CX = length of buffer
        ES:DI -> buffer for statistics (see #02885)
        Return: AX = status (0000h if successful) (see #02860)
                buffer filled if successful
 04h    Print Get/Set Data
        BX = subfunction
            00h set printer control flags (see #02886)
            01h get printer control flags
            02h set extended printer control flags (see #02887)
            03h get extended printer control flags
        AX = offset within Print structures at which to start read/write
        CX = number of bytes to transfer
        DX = printing device number (00h=LPT1/PRN, 01h=LPT2, etc.)
        DS:SI -> buffer containing values for flags (subfunctions 00h/02h)
        ES:DI -> buffer for flags (subfunctions 01h/03h
        Return: AX = status (see #02860)
                ---if successful---
                CX = number of bytes returned (subfunctions 01h/03h)
                DX = maximum supported size for function/type of data
 05h    Print Open Capture File
 07h    Print Get Num Of Printers
        BX = subfunction
            0000h get number of physical printers
            nonzero: get configured printer (from NET.CFG)
        Return: AX = status (see #02860)
                ---if successful---
                BX = number of physical/configured printers
 08h    Print Redirection
        BX = subfunction
            0000h redirect device to queue
                AX = length of queue name, 0000h to use queue ID
                CX = connection handle
                DX = printer/device number (00h=LPT1/PRN, 01h=LPT2, etc.)
                DS:SI -> uppercased ASCIZ queue name
                ES:DI -> DWORD queue ID, 00000000h to use queue name
            0001h test whether device is redirected
                DX = printer/device number (00h=LPT1/PRN, 01h=LPT2, etc.)
            0002h cancel redirection
                DX = printer/device number (00h=LPT1/PRN, 01h=LPT2, etc.)
            0003h redirect device to file
                AX = 0000h or 4E57h ('NW')
                CX = connection handle
                DX = printer/device number (00h=LPT1/PRN, 01h=LPT2, etc.)
                ES:DI -> ASCIZ path of file
            0004h get extended redirection information (see #02886)
                DX = printer/device number (00h=LPT1/PRN, 01h=LPT2, etc.)
                ES:DI -> buffer for server/queue name
                Return: ES:DI buffer filled
        Return: AX = 0000h if successful
 09h    Print Flush And Close Job
        BX = subfunction
            0000h unconditional close
            nonzero: conditional close -- close only if concatenate flag is
                  clear
        DX = index of printing device (00h=LPT1/PRN, 01h=LPT2, etc.)
        Return: AX = status (see #02860)
 0Ch    Print Get/Set Banner Name
        BL = subfunction
            00h set banner name
                DS:SI -> ASCIZ banner name (12 bytes, including NUL)
            01h get banner name
                ES:DI -> 12-byte buffer for banner name
        Return: AX = status (see #02860)

Format of PRINT.VLM statistics:
Offset  Size    Description     (Table 02885)
 00h    WOFD    size of statistics buffer (including this word)
 02h    DWORD   -> old INT 17 handler
 06h    WORD    number of physical printers reported by BIOS
SeeAlso: #02884

Format of PRINT.VLM standard print control information:
Offset  Size    Description     (Table 02886)
 00h    BYTE    PFStatus (reserved, 00h)
 01h    BYTE    print flags (default 80h)
                bit 2: release job for printing if capture interrupted
                bit 3: suppress form feed
                bit 4: notify
                bit 6: text file
                bit 7: print banner
 02h    BYTE    tab size (01h-12h, default 08h)
 03h    BYTE    number of copies (default 01h)
 04h    BYTE    ??? (may be number of copies instead of offset 03h)
 05h    BYTE    form type to be mounted in printer (default 00h)
 06h    BYTE    reserved (00h)
 07h 14 BYTEs   banner
 15h    BYTE    capture printer (LPT) number
 16h    WORD    capture timeout in seconds
 18h    BYTE    job concatenation flag (00h or 01h, default 00h)
 19h    BYTE    maximum lines per page (default 66)
 1Ah    BYTE    ??? (may be maximum lines instead of offset 19h)
 1Bh    BYTE    maximum characters per line (default 132)
 1Ch    BYTE    ??? (may be maximum characters instead of offset 1Ch)
 1Dh 13 BYTEs   name of form to be mounted in printer
 2Ah    BYTE    flag: capture active (00h or FFh, default 00h)
 2Bh    BYTE    flag: capturing to file (00h or 01h, default 00h)
 2Ch    BYTE    flag: timeout field is being decremented (default 00h)
 2Dh    DWORD   -> printer setup string
 31h    DWORD   -> printer reset string
 35h    BYTE    reserved (01h)
---remainder is read-only---
 36h    BYTE    flag: job has started printing (00h or FFh, default 00h)
 37h    BYTE    flag: job placed in queue (00h or FFh, default 00h)
 38h    BYTE    flag: PJobValid (00h or FFh, default 00h)
                FFh if associated capture file is open for capturing data
 39h    DWORD   print-queue ID
 3Dh    WORD    print-job number (default 00h) (1-999)
 3Fh    BYTE    number of chars in INT 17h print cache buffer (default 00h)
 40h    BYTE    ???
 41h    WORD    high word of print-job number (default 00h)
SeeAlso: #02884,#02887

Format of PRINT.VLM extended print control information:
Offset  Size    Description     (Table 02887)
 00h    DWORD   NDS printer object ID or directory entry number (when capturing
                  to a file)
 04h    BYTE    connection handle for server
 06h 48 BYTEs   ASCIZ print queue name on server
 36h    DWORD   ID of target server, or FFFFFFFFh if any server may be used
 3Ah  6 BYTEs   target print time, FFFFFFFFFFFFh for immediate printing
 40h    BYTE    status flags
 41h    BYTE    ???
 42h 13 BYTEs   client's banner name (overrides global banner if set)
 4Fh 13 BYTEs   job description
 5Ch  4 BYTEs   reserved (0)
SeeAlso: #02884,#02886

(Table 02888)
Call GENERAL.VLM (VLM ID 0043h) with:
Func    Description/Registers
 01h    Gen Get Version
        BX = function
            0000h get version
                Return: AX = status (see #02860)
                        BX = major version of VLM supported (0001h)
                        CX = minor version of VLM supported (0000h)
 03h    Gen Statistics
        CX = length of statistics buffer
        ES:DI -> buffer for statistics (see #02889)
        Return: AX = status (see #02860)
 04h    Gen Get/Set Primary
        BX = subfunction
            0001h get primary connection
                CX = primary connection handle to be retrieved
                Return: AX = status (see #02860)
                        CX = primary connection handle
            0002h set primary connection
                CX = primary connection handle to be stored
                Return: AX = status (see #02860)
 06h    Gen Specific
        BX = subfunction
            0000h get command processor and master environment addresses
                Return: DX = segment of master environment
                        ES:DI -> command processor's private COMSPEC= copy
            0001h get default or primary connection
                Return: AX = status (0000h successful)
                        CX = connection handle if successful
            0002h last queue information
                AL = operation
                    00h zap
                    01h set
                    02h get
                DI:DX = queue file handle
                CX = connection handle
                Return: AX = status (0000h successful)
                        DI:DX = queue file handle
                        CX = connection handle or 0000h if queue info invalid
            0003h get/set machine name(s)
                AX = name type
                    00h get short machine name
                    02h get long machine name
                    04h set short machine name
                    06h set long machine name
                    08h get DOS name
                    0Ah set DOS name
                ES:SI -> ASCIZ name if setting
                Return: AX = status (0000h if successful)
                        ES:SI -> ASCIZ name if getting
            0004h set per-task EXEC search mode
                Return: AX = status (0000h if successful)
 09h    Gen Return Drive Info
        BX = subfunction
            0000h get first available drive
                Return: AX = status (see #02860)
                        BX = drive letter of first drive
            0001h get Lastdrive
                Return: AX = status (see #02860)
                        CH = number lastdrive 1=A: - 1Ah=Z:

Format of NetWare GENERAL.VLM statistics:
Offset  Size    Description     (Table 02889)
 00h    WORD    size of statistics record, including this word
 02h    DWORD   previous INT 21 vector
SeeAlso: #02888

(Table 02890)
Call NETX.VLM (VLM ID 0050h) with:
Func    Description/Registers
 01h    NetX Get Version
        BX = function
            0000h get version
                Return: AX = status (see #02860)
                        BX = major version of VLM supported (0001h)
                        CX = minor version of VLM supported (0000h)
 03h    NetX Statistics
        CX = length of statistics buffer
        ES:DI -> buffer for statistics (see #02891)
        Return: AX = status (see #02860)

Format of NETX.VLM statistics:
Offset  Size    Description     (Table 02891)
 00h    WORD    buffer size, including this word
 02h    DWORD   previous INT 21 handler
SeeAlso: #02890

(Table 02892)
Call SECURITY.VLM (VLM ID 0061h) with:
Func    Description/Registers
 01h    Security Get Version
        BX = function
            0000h get version
                Return: AX = status (see #02860)
                        BX = major version of VLM supported (0001h)
                        CX = minor version of VLM supported (0000h)
 03h    Security Statistics
 04h    ???
        AL = subfunction
            01h compute session key
                DS:SI -> 24-byte input buffer
                ES:DI -> 8-byte output buffer
--------N-2F7A20BX0001-----------------------
INT 2F - Novell NetWare - DOS Requester v1.03+ - GET VLM CallA ADDRESS
        AX = 7A20h
        BX = 0001h
Return: AX = 0000h if request was handled
            ES:BX -> CallA entry point (see #02893)
SeeAlso: AX=7A20h/BX=0000h

(Table 02893)
Call VLM CallA entry point with:
        AX = function
            0000h submit
            0001h cancel (not implemented)
        ES:DI -> Overlay Asynchronous Control Block structure (see #02894)
Return: DI, DS, ES preserved; all other registers may be destroyed
        interrupts disabled
Desc:   asychronously call the specified VLM and then return to caller, which
          might be another VLM

Format of Overlay Asynchronous Control Block (OACB):
Offset  Size    Description     (Table 02894)
 00h    DWORD   link to next OACB, 0000h:0000h if last (filled by VLM.EXE)
 04h    DWORD   callback address or 0000h:0000h
 08h    BYTE    InUse flag (00h if complete) (set by VLM.EXE)
 09h    BYTE    flag, reserved for VLM use
 0Ah    WORD    destination VLM
 0Ch    WORD    destination function
 0Eh    WORD    temporary storage for VLM.EXE
 10h  6 BYTEs   reserved
 16h  6 DWORDs  EAX,EBX,ECX,EDX,ESI,EDI
 2Eh  4 WORDs   DS,ES,FS,GS (FS and GS not used)
--------N-2F7A20BX0002-----------------------
INT 2F - Novell NetWare - DOS Requester v1.03+ - GET VLM MULTIPLEX ADDRESS
        AX = 7A20h
        BX = 0002h
Return: AX = 0000h
        ES:BX -> VLM multiplex entry point (see #02895)
Note:   for v1.10, this function is only available while VLM.EXE is loading
          the .VLM modules, because ES is destroyed on return
SeeAlso: AX=7A20h/BX=0000h,AX=7A20h/BX=0001h,AX=7A20h/BX=0003h

(Table 02895)
Call DOS Requester entry point with:
        BX = function???
            0000h
                DX = ???
                DI = ???
                BP = ???
            0002h
                CX = ???
            0003h
                DX = ???
                BP = ???
            0006h
                AH = subfunction???
                AL = ???
                STACK: variable (0, 4, 10, 14 bytes seen)
--------N-2F7A20BX0003-----------------------
INT 2F - Novell NetWare - DOS Requester v1.03+ - GET VLM PARSE API ADDRESS
        AX = 7A20h
        BX = 0003h
Return: AX = 0000h if request was handled
            ES:BX -> VLM parse API entry point
--------N-2F7A20BX0004-----------------------
INT 2F - Novell NetWare - DOS Requester v1.03+ - GET VLM MULTICAST CALLOUT
        AX = 7A20h
        BX = 0004h
Return: AX = 0000h if request was handled
            ES:BX -> VLM multicast data (see #02896)
SeeAlso: AX=7A20h/BX=0000h,AX=7A20h/BX=0002h,AX=7A20h/BX=0005h

Format of DOS Requester data:
Offset  Size    Description     (Table 02896)
 00h    DWORD   pointer to ??? (code)
 04h  4 BYTEs   ???
 08h    DWORD   pointer to ??? (code) (see #02897)
        ???

(Table 02897)
Call offset 08h function with:
        AL = function (00h-07h)
        ???
Return: ???
--------N-2F7A20BX0005-----------------------
INT 2F - Novell NetWare - DOS Requester v1.03+ - GET VLM INT 24 ADDRESS
        AX = 7A20h
        BX = 0005h
Return: AX = 0000h if request was handled
            ES:BX -> VLM INT 24 handler
SeeAlso: AX=7A20h/BX=0000h,AX=7A20h/BX=0002h,AX=7A20h/BX=0004h
--------N-2F7A20BX0006-----------------------
INT 2F - Novell NetWare - DOS Requester v1.03+ - GET ??? ENTRY POINT
        AX = 7A20h
        BX = 0006h
Return: AX = 0000h if request was handled
            ES:BX -> ??? entry point (RETF in v1.03 and v1.10)
--------N-2F7A20BX0007-----------------------
INT 2F - Novell NetWare - DOS Requester v1.03+ - GET ??? ENTRY POINT
        AX = 7A20h
        BX = 0007h
Return: AX = 0000h
        ES:BX -> ??? entry point (RETF in v1.03 and v1.10)
--------N-2F7A20BX0008-----------------------
INT 2F - Novell NetWare - DOS Requester v1.03+ - GET ??? ENTRY POINT
        AX = 7A20h
        BX = 0008h
Return: AX = 0000h
        ES:BX -> ??? entry point (RETF in v1.03 and v1.10)
--------N-2F7A20BX0080-----------------------
INT 2F - Novell NetWare - DOS Requester v1.03+ - GET ??? ENTRY POINT
        AX = 7A20h
        BX = 0080h
Return: AX = 0000h
        ES:BX -> ??? entry point (RETF in v1.03 and v1.10)
Note:   this function is identical to AX=7A20h/BX=0006h in v1.03 and v1.10
--------N-2F7A20BX0081-----------------------
INT 2F - Novell NetWare - DOS Requester v1.03+ - GET ??? ENTRY POINT
        AX = 7A20h
        BX = 0081h
Return: AX = 0000h
        ES:BX -> ??? entry point (RETF in v1.03 and v1.10)
Note:   this function is identical to AX=7A20h/BX=0007h in v1.03 and v1.10
--------N-2F7A20BX0082-----------------------
INT 2F - Novell NetWare - DOS Requester v1.03+ - GET ??? ENTRY POINT
        AX = 7A20h
        BX = 0082h
Return: AX = 0000h
        ES:BX -> ??? entry point (RETF in v1.03 and v1.10)
Note:   this function is identical to AX=7A20h/BX=0008h in v1.03 and v1.10
--------N-2F7A21-----------------------------
INT 2F C - Novell NetWare - DOS Requester - BROADCAST CALLBACK
        AX = 7A21h
        CX = server connection (FFFFh if message from Personal NetWare user)
        interrupts disabled
Return: CX = 0000h if broadcast handled
        interrupts disabled
Note:   this function is only linked into INT 2F when INT 21/AH=DEh/DL=05h
          has been issued
SeeAlso: AX=7A22h,AX=7A85h,INT 21/AH=DEh
--------N-2F7A22-----------------------------
INT 2F C - Novell NetWare - DOS Requester - BROADCAST/SFT3 INFORM
        AX = 7A22h
        DL = function
            21h ('!') broadcast waiting for workstation
            40h ('@') SFT3 server-change inform
        BX = transport type
            0021h IPX
            0022h TCP
        ES:SI -> transport-specific data block
            (ECB for IPX, undefined for TCP)
        interrupts disabled
Return: AX = 0000h if event handled, unchanged if not
        interrupts disabled
Note:   this callback is made from within a hardware interrupt handler; a
          separate call to AX=7A21h is made once the system is in a safe
          state for receiving the message
SeeAlso: AX=7A21h
--------N-2F7A2F-----------------------------
INT 2F - Novell NetWare - IPXODI v2.12 - GET GNMA SUPPORT
        AX = 7A2Fh
Return: AX = 0000h if supported and active
            BX = support level (0001h)
            ES:DI -> GNMA entry point (see #02898)
Program: GNMA is the Generic NetWare Management Agent
Note:   IPXODI v2.12 is distributed as part of the Personal NetWare system
          bundled with Novell DOS 7
SeeAlso: INT 7A/BX=001Fh

(Table 02898)
Call IPXODI GNMA entry point with:
        BX = function
            0000h Register Responder
                ES:SI -> responder structure (see #02899)
                Return: CF clear if successful
                        CF set on error
                        AX = status
                            FFFFh if specified responder is already registered
                        interrupts enabled
                        all other registers except DS, CS:IP, SS:SP destroyed
                Note:   the responder structure must not be deallocated until
                          the responder is deregistered
            0001h Deregister Responder
                AX = type of responder to deregister
                Return: AX = status
                            FFFFh if specified responder not registered
                        interrupts enabled
                        ES:SI buffer from original registration may now be
                              freed
                        all other registers except DS, CS:IP, SS:SP destroyed
            0002h Get Responders
                Return: ES:SI -> head of responder structure list (read-only)
                        interrupts enabled
                        all other registers except DS, CS:IP, SS:SP destroyed
                Note:   the returned list may change as tasks are swapped in
                          and out
            0003h Send Acknowledgement
                AL = completion code
                    00h successful
                    01h-FCh responder-specific
                    FDh invalid function
                CX = length of return data (0000h if none)
                DX:SI -> return data
                Return: interrupts enabled
                        all other registers except DS, CS:IP, SS:SP destroyed

Format of NetWare GNMA responder structure:
Offset  Size    Description     (Table 02899)
 00h    DWORD   -> next responder structure (used by GNMA)
 04h    DWORD   -> responder's request handler (called by GNMA) (see #02900)
 08h    WORD    responder ID
 0Ah    WORD    number of functions supported by responder
 0Ch    DWORD   reserved for use by GNMA
SeeAlso: #02898

(Table 02900)
Values GNMA responder's request handler is called with:
        AL = function
            00h responder request
                CX = length of request data (not including header) (see #02901)
                DS:DI -> request data (see #02901)
                DS:BX -> 528-byte reply buffer
                ES:SI -> responder structure (see #02899) from registration
                DF clear
                interrupts disabled
                Return: AH = acknowledement status
                            00h acknowledgment being returned synchronously
                            nonzero: acknowledgment will be sent via GNMA
                                  function 0003h (see #02898)
                                CX = length of acknowledement data
                                DX:BX -> acknowledgment (may use provided
                                          buffer or another buffer)
                        AL = completion code
                            00h successful
                            01h-FCh responder-specific
                            FDh invalid request
                        DF clear
                        interrupts disabled
                        other registers may be destroyed
            01h responder acknowledgement complete
                ES:SI -> responder structure (see #02899) from registration
                DF clear
                interrupts disabled
                Return: DF clear
                        interrupts disabled
                        all registers (except SS:SP) may be destroyed
                Note:   this function is called if function 00h returned a
                          responder-provided data buffer; once this function
                          is called, the responder may deallocate the buffer
            02h responder reset
                ES:SI -> responder structure (see #02899) from registration
                DF clear
                interrupts disabled
                Return: DF clear
                        interrupts disabled
                        all registers (except SS:SP) may be destroyed
                Note:   called whenever a network managment application
                          terminates
Note:   the responder handler should switch to a local stack if it enables
          interrupts or uses more than a few words of stack space
SeeAlso: #02899

Format of GNMA responder request data:
Offset  Size    Description     (Table 02901)
 00h    WORD    responder's assigned ID
 02h    WORD    function number (defined by responder)
 04h  N BYTEs   data for request (max 528 bytes; actual amount is determined
                  by CX)
SeeAlso: #02900
--------N-2F7A2FBX0EDC-----------------------
INT 2F U - Personal NetWare - HRMIB - UNINSTALL
        AX = 7A2Fh
        BX = 0EDCh ('EDC' = Novell European Development Center)
Return: ???
SeeAlso: AX=7AA0h
--------N-2F7A40-----------------------------
INT 2F - Novell NetWare - TCP/IP Protocol Stack - INSTALLATION CHECK
        AX = 7A40h
Return: AX = 7AFFh if installed
            0000h:BX = address of interrupt vector for MLID ISR
            CX = version (CH=major, CL=minor)
            DX = 0000h
            ES:DI -> entry point for TCP/IP stack (see #02903)
Notes:  Novell's LAN Workplace for DOS TCPIP.EXE also supports this interface
        this function is also supported by the Beame&Whiteside BWLWP40 shim,
          but it only returns AL and ES:DI, and does not support AX=7A41h
SeeAlso: AX=7A41h,INT 15/AX=DE2Eh,INT 60"Excelan"


(Table 02902)
Values for NetWare TCP/IP function code:
 01h    "accept" accept a network connection request
 02h    "bind" associate an address with a socket
 03h    close socket
        Call:   socket number field set
 04h    "connect" connect to a remote host
 05h    "getmyipaddr" get IP address
        Call:   socket number field in sockaddr set to 0000h
 06h    "getmymacaddr" get hardware address
 07h    "getpeername"
 08h    "getsockname" get socket name
 09h    "getsockopt" get socket options
 0Ah    "getsubnetmask" get subnet mask
 0Bh    "ioctl"
 0Ch    "listen" wait for connection request on socket
 0Dh    "select"
        Return: socket bitmap updated (1=active)
 0Eh    "setmyipaddr" (obsolete) set IP address
 0Fh    "setsockopt" set socket options
 10h    "shutdown"
 11h    "socket" open socket
        Call:   socket number field set to 0000h
        Return: socket number set
 12h    "recv" get data from peer
 13h    "recvfrom" get data from specified remote host
        Call:   socket number set
                packet length and buffer descriptors set
        Return: packet length and receive buffers updated
                sockaddr field set to source port number + IP address
 14h    "send" write data to socket
 15h    "sendto" write data to specified recipient
        Call:   socket number set
                flags at offset 18h = 0000h
                packet length and buffer descriptors set
---v4.02+ ---
 16h    get BOOTP data
        Return: BOOTP data stored in parameter block (see #02906)
 17h    "getsnmpinfo"
 18h    "getpathinfo" get/set configuration???
---v4.??? ---
 19h    "getifn"        get interface number
 1Ah    "setipinfo"     set IP information
 1Bh    "getipinfo"     get IP information
 1Ch    "setdnsinfo"    set DNS information
 1Dh    "getdnsinfo"    get DNS information
 1Eh    "setroutes"     set/modify route entry(ies)
 1Fh    "getroutes"     get route entry(ies)
 20h    "removeroutes"  remove route entry(ies)
 21h    "setarpe"       set/modify ARP entry(ies)
 22h    "getarpe"       get ARP entry(ies)
 23h    "removearpe"    remove ARP entry(ies)
Notes:  these functions are based on the Unix socket interface
        OR function number with 80h to call ESR
SeeAlso: #02904

(Table 02903)
Call NetWare TCP/IP entry point with:
        ES:SI -> parameter block (see #02904)
Return: ES:SI parameter block updated
        DX may be destroyed

Format of NetWare TCP/IP Request Control Block (RCB):
Offset  Size    Description     (Table 02904)
 00h    DWORD   -> next RCB
 04h    DWORD   -> previous RCB
 08h    DWORD   -> FAR post routine called if bit 7 of function code set
 0Ch    BYTE    flags (internal use)
                bit 0: request in progress
                bit 1: posted
                bit 2: Windows
                bit 3: "PROTBUF"
                bit 4: "ABORTRCB" for Ctrl-Break handling
                bit 5: call INT 21/AX=0B00h while blocking
 0Dh  7 BYTEs   ???
 14h    BYTE    (ret) temporary result code
 15h    BYTE    (call) function code (bit 7 set if non-blocking) (see #02902)
 16h    BYTE    socket number
 17h    BYTE    (ret) result or error code (see #02905)
---accept/bind/connect/getmyipaddr/getpeername/getsockname commands---
 18h            sockaddr structure (WORD port + DWORD IP address)
---close comand---
 no additional fields
---getmymacaddr command---
 18h  6 BYTEs   low-level hardware network address
---BOOTP command---
 18h 64 BYTEs   BOOTP VSA data (see #02906)
---getpathinfo command
 18h  8 BYTEs   key
                "TCP_CFG" used by PING.EXE
 20h 128 BYTEs  path
 A0h    WORD    length of path in previous field
---getsockopt/setsockopt commands---
 18h    WORD    option name
                0004h SO_REUSEADDR
                0008h SO_KEEPALIVE
                0080h SO_LINGER
 1Ah    WORD    option value
 1Ch    WORD    "linger"
---getsubnetmask command---
 18h    DWORD   sockaddr structure (WORD port + DWORD subnet mask)
---ioctl command---
 18h    DWORD   argument value
 1Ch    WORD    ioctl number
---listen command---
 18h    WORD    maximum allowable connection backlog
---select command---
 18h    WORD    number of sockets
 1Ah            fd_set readfds (bitmap of sockets)
                fd_set writefds
                fd_set expectionfds
        DWORD   timeout in clock ticks
---shutdown command---
 18h    WORD    shutdown type
---socket command---
 18h    WORD    protocol (1 = ICMP, 6 = TCP, 17 = UDP)
---I/O commands (recv,recvfrom,send,sendto)---
 18h    WORD    flags
 1Ah  6 BYTEs   sockaddr from/to
                WORD    port number
                DWORD   IP address
 20h    WORD    length of packet sent/received
 22h    WORD    number of pointer/length pairs following (max 8)
 24h 6N BYTEs   buffer descriptors, each
                Offset  Size    Description
                 00h    DWORD   pointer to buffer
                 04h    WORD    length of buffer
---getsnmpinfo command---
 18h    DWORD   (ret) -> ??? data in TCPIP code segment
--getifn command---
 18h    WORD    interface number
 1Ah    WORD    MLID instance number
 1Ch 128 BYTEs  MLID name
---getipinfo/setipinfo commands---
 18h    WORD    interface number (00h = default)
 1Ah    DWORD   IP address
 1Eh    DWORD   IP netmask
 22h  3 DWORDs  router addresses (00000000h = unused entry)
---getdnsinfo/setdnsinfo commands---
 18h    WORD    interface number (00h = default)
 1Ah  3 DWORDs  name server IP addresses (00000000h = unused entry)
 26h 128 BYTEs  domain name
---getroutes/setroutes/removeroutes commands---
 18h    WORD    number of route entries to follow (max 5)
 1Ah 10N BYTEs  route entries
                DWORD   destination host/net IP address
                DWORD   IP address of first router
                WORD    route type
---getarpe/setarpe/removearpe commands---
 18h    WORD    number of ARP entries to follow (max 16)
 1Ah 10N BYTEs  ARP entries
                DWORD   destination IP address
                6 BYTEs destination hardware address
---other commands---
 18h  4 WORDs   parameter words 0 to 3 (see #02902 for usage)

(Table 02905)
Values for NetWare TCP/IP status:
 00h    successful
 04h    would block
 09h    invalid socket
 23h    would block
 24h    operation in progress
 25h    already in progress
 26h    not a socket
 27h    destination address required
 28h    message too long
 29h    wrong protocol type for socket
 2Ah    protocol not available
 2Bh    protocol not supported
 2Ch    socket type not supported
 2Dh    operation not supported on socket
 2Eh    protocol family not supported
 2Fh    address family not supported by protocol family
 30h    address already in use
 31h    unable to assign requested address
 32h    network is down
 33h    network is unreachable
 34h    network dropped connection
 35h    software caused connection abort
 36h    connection reset by peer
 37h    no buffer space
 38h    socket is already connected
 39h    socket is not connected
 3Ah    socket is in shutdown mode
 3Bh    too many references
 3Ch    connection timed out
 3Dh    connection refused
 3Eh    too many levels of symbolic links
 3Fh    file name too long
 40h    host is down
 41h    host unreachable
 42h    protocol stack not installed
 43h    asynchronous operation not supported
 44h    synchronous operation not supported
 45h    no RCB available
 FFh    blocking (call has not yet returned)
SeeAlso: #02904

Format of BOOTP data (stored in parameter block):
Offset  Size    Description     (Table 02906)
 18h  4 BYTEs   ???
 1Ch    BYTE    ??? (01h)
 1Dh    BYTE    address length (04h)
 1Eh  4 BYTEs   subnet mask
 22h    BYTE    ??? (03h)
 23h    BYTE    ??? (04h)
 24h  4 BYTEs   IP address of nearest router
 28h    BYTE    ??? (06h)
 29h    BYTE    length of following data (08h)
 2Ah  4 BYTEs   IP address of nameserver 1
 2Eh  4 BYTEs   IP address of nameserver 2
 32h    BYTE    ??? (0Ch)
 33h    BYTE    length of local name
 34h  N BYTEs   local host name
        BYTE    FFh (end marker)
SeeAlso: #02904,#02902
--------N-2F7A41-----------------------------
INT 2F U - Novell NetWare - TCP/IP Protocol Stack - WINDOWS SUPPORT???
        AX = 7A41h
        ES:DI -> FAR entry point for ??? (will be called with BX=1,2,3,4)
Return: AX = 7AFFh if supported
            0000h:BX = address of interrupt vector for MLID ISR
            CX = version (CH=major, CL=minor)
            DX = 0000h
            ES:SI -> DWORD containing passed value of ES:DI
            ES:DI -> entry point for TCP/IP stack
Notes:  Novell's LAN Workplace for DOS TCPIP.EXE also supports this interface
        the pointer which is set to ES:DI is cleared to 0000h:0000h when
          a Windows exit broadcast is received
SeeAlso: AX=7A40h
--------N-2F7A42-----------------------------
INT 2F U - Novell NetWare - TCPIP.EXE v4.1 - GET ??? ENTRY POINT
        AX = 7A42h
Return: AX = 7AFFh if supported
            ES:DI -> ??? entry point (see #02907)

(Table 02907)
Call NetWare TCPIP.EXE entry point with:
        DX = ???
        ES:DI -> ??? (see #02908)
Return: AX = 0000h
        other registers destroyed

Format of data buffer:
Offset  Size    Description     (Table 02908)
 00h    WORD    offset of WORD ??? or 0000h
 02h    WORD    offset of DWORD ??? or 0000h
 04h    WORD    offset of DWORD ??? or 0000h
--------N-2F7A43-----------------------------
INT 2F U - Novell NetWare - TCPIP.EXE v4.1 - GET ???
        AX = 7A43h
Return: AX = 7AFFh if supported
            DX = offset of ???
SeeAlso: AX=7A44h
--------N-2F7A44-----------------------------
INT 2F U - Novell NetWare - TCPIP.EXE v4.1 - SET ???
        AX = 7A44h
        DX = offset of ??? (see AX=7A43h)
Return: AX = 7AFFh if supported
SeeAlso: AX=7A43h
--------N-2F7A4C-----------------------------
INT 2F U - Novell NetWare - TCPIP.EXE v4.1 - GET ???
        AX = 7A4Ch
Return: AX = 7AFFh if supported
            BX = ??? (0037h)
            CX = ??? (001Ch)
--------N-2F7A4DBX0001-----------------------
INT 2F U - Novell NetWare - ???
        AX = 7A4Dh
        BX = 0001h
        ES:DI -> ???
Return: AL = FFh if ???
            ES:DI -> ???
Note:   called by NETBIOS.EXE v3.01
--------N-2F7A4E-----------------------------
INT 2F U - Novell LAN Workplace for DOS - RARPD.EXE - INSTALLATION CHECK
        AX = 7A4Eh
Return: AX = 7AFFh if installed
SeeAlso: AX=7A4Fh"RARPD"
--------N-2F7A4F-----------------------------
INT 2F U - Novell LAN Workplace for DOS - RARPD.EXE - UNINSTALL
        AX = 7A4Fh
Return: AX = 7AFFh if installed
        DX,ES destroyed
Note:   this call conflicts with SNMP.EXE (both RARPD and SNMP are supplied
          with LAN Workplace for DOS!), such that running SNMP will uninstall
          RARPD as SNMP checks whether it is already installed!
SeeAlso: AX=7A4Eh"RARPD",AX=7A4Fh/BX=0001h
--------N-2F7A4FBX0001-----------------------
INT 2F U - Novell NetWare - SNMP.EXE - INSTALLATION CHECK
        AX = 7A4Fh
        BX = 0001h
Return: AX = 7AFFh if installed
Note:   this call conflicts with RARPD.EXE (both SNMP and RARPD are supplied
          with LAN Workplace for DOS!), such that running SNMP will uninstall
          RARPD as SNMP checks whether it is already installed!
SeeAlso: AX=7A4Fh"RARPD",AX=7A4Fh/BX=0002h
--------N-2F7A4FBX0002-----------------------
INT 2F U - Novell NetWare - SNMP.EXE - ???
        AX = 7A4Fh
        BX = 0002h
Return: AL = status
            4Fh if failed
            FFh if successful
SeeAlso: AX=7A4Fh/BX=0001h
--------N-2F7A80-----------------------------
INT 2F C - Novell NetWare - SHELL 3.01d BROADCAST - ABNORMAL EXIT
        AX = 7A80h
Return: nothing
Notes:  called on abnormal exit of the NetWare shell to notify other Novell
          TSRs that it is unsafe to call the shell in the future; also called
          by NETX.VLM when it is unloaded
        must be passed through so that all interested programs see the exit
        on receiving this call, IPXODI clears an internal pointer to a
          default value; Novell's NETBIOS.EXE clears its INT 21h pointer to
          0000h:0000h and stops calling it
SeeAlso: AX=7A81h
--------N-2F7A81-----------------------------
INT 2F C - Novell NetWare - SHELL 3.01d BROADCAST - SET SHELL INT 21 HANDLER
        AX = 7A81h
        CX:DX -> shell's INT 21h entry point
Return: nothing
Notes:  the shell calls this function as it loads to allow interested TSRs
          and drivers to make a local copy of the shell's entry point
        must be passed through so that all interested programs see it
--------N-2F7A85-----------------------------
INT 2F C - Novell NetWare - shell 3.01 - BROADCAST INFORM
        AX = 7A85h
        CX = broadcast server number
Return: CX = 0000h if broadcast message handled by another program
        CX unchanged if broadcast not handled
SeeAlso: AX=7A21h
--------N-2F7A90-----------------------------
INT 2F U - Novell NetWare - NETBIOS.EXE 3+ - INSTALLATION CHECK
        AX = 7A90h
Return: AL = 00h if present
            BX = ???
            CX = PSP segment of NETBIOS resident code
SeeAlso: AX=7AFEh
--------N-2F7AA0-----------------------------
INT 2F U - Personal NetWare - HRMIB - ???
        AX = 7AA0h
        BX = function
            0000h ???
            0001h ???
Return: ???
SeeAlso: AX=7A2Fh/BX=0EDCh
--------N-2F7AC1-----------------------------
INT 2F - LAN HiJack - LHR - DISABLE???
        AX = 7AC1h
Program: LAN HiJack is a NetWare utility by KDS Software which allows a user
          to take over control of a workstation remotely; LHR is the program
          run on the slave workstation
SeeAlso: AX=7AC8h,AX=7AC9h,AX=7ACFh
--------N-2F7AC2-----------------------------
INT 2F - LAN HiJack - LHR - SYNCHRONIZE SHIFT STATES???
        AX = 7AC2h
Note:   sets BIOS keyboard status byte to an internal variable
SeeAlso: AX=7AC3h,AX=7ACFh
--------N-2F7AC3-----------------------------
INT 2F - LAN HiJack - LHR - CLEAR ??? FLAG
        AX = 7AC3h
SeeAlso: AX=7AC2h,AX=7ACFh
--------N-2F7AC8-----------------------------
INT 2F - LAN HiJack - LHR - ENABLE FUNCTIONS
        AX = 7AC8h
        BL = function(s) to enable (see #02909)
SeeAlso: AX=7AC1h,AX=7AC9h,AX=7ACFh

Bitfields for LAN HiJack function(s) to enable/disable:
Bit(s)  Description     (Table 02909)
 0      ???
 1      remote keyboard enabled
 2      support remote's mouse
 3-7    unused
--------N-2F7AC9-----------------------------
INT 2F - LAN HiJack - LHR - DISABLE FUNCTIONS
        AX = 7AC9h
        BL = function(s) to disable (see #02909)
SeeAlso: AX=7AC1h,AX=7AC8h
--------N-2F7ACA-----------------------------
INT 2F - LAN HiJack - LHJ - ???
        AX = 7ACAh
        BL = ???
Return: ???
Program: LAN HiJack is a NetWare utility by KDS Software which allows a user
          to take over control of a workstation remotely; LHJ is the program
          run on the controlling workstation
--------N-2F7ACB-----------------------------
INT 2F - LAN HiJack - LHJ - ???
        AX = 7ACBh
        BX = ???
Return: ???
Note:   this function appears to be related to the keyboard
SeeAlso: AX=7ACCh
--------N-2F7ACC-----------------------------
INT 2F - LAN HiJack - LHJ - ???
        AX = 7ACCh
        BX = ???
Return: ???
Note:   this function appears to be related to the mouse
SeeAlso: AX=7ACBh
--------N-2F7ACFBX0000-----------------------
INT 2F - LAN HiJack - LHR - INSTALLATION CHECK
        AX = 7ACFh
        BX = 0000h
Return: BX = segment of resident code if installed
Program: LAN HiJack is a NetWare utility by KDS Software which allows a user
          to take over control of a workstation remotely; LHR is the program
          run on the slave workstation
--------N-2F7AF0-----------------------------
INT 2F - Novell NetWare - DOSNP.EXE v1.30G - INSTALLATION CHECK
        AX = 7AF0h
Return: AL = FFh if present
            ES = 7AF0h
            CX = PSP segment of resident code
--------N-2F7AF1-----------------------------
INT 2F - Novell NetWare - Access Server Driver - INSTALLATION CHECK
        AX = 7AF1h
        BL = sequence number (01h first driver, 02h second, 00h no driver)
Return: AX <> 7AF1h if present
            BH = total number of drivers
            ---if BL nonzero on entry---
            AL = number of ports provided by specified driver
            ES:DI -> driver entry point
                      (see #02910,#02911,#02912,#02913,#02914,#02915,#02916,#02917)
            ES:DX -> ID string
SeeAlso: INT 7A/BX=001Ch

(Table 02910)
Call Access Server driver "initialize port" function with:
        AH = 01h
        AL = port number (00h-0Fh)
        ES:BX -> configuration parameter block (see #02923)
        interrupts disabled
Return: CF clear if successful
        CF set on error
SeeAlso: #02911

(Table 02911)
Call Access Server driver "get port status" function with:
        AH = 02h
        AL = port number (00h-0Fh)
        interrupts disabled
Return: CF clear if successful
            BL = transmitter status (see #02920)
            BH = receiver status (see #02921)
            DL = external status signals (see #02922)
        CF set on error
        interrupts disabled
SeeAlso: #02910,#02912,#02915

(Table 02912)
Call Access Server driver "get input from port" function with:
        AH = 03h
        AL = port number (00h-0Fh)
        CX = size of data buffer
        ES:BX -> buffer for data
        interrupts disabled
Return: CF clear if successful
        CF set on error
        interrupts disabled
        CX = number of bytes read
Note:   the driver will add a NUL to the buffer when a break signal is detected
SeeAlso: #02912,#02913

(Table 02913)
Call driver "send output data to port" function with:
        AH = 04h
        AL = port number (00h-0Fh)
        CX = number of bytes to send
        ES:BX -> buffer containing data
        interrupts disabled
Return: CF clear if successful
        CF set on error
        interrupts disabled
        CX = number of bytes actually written
SeeAlso: #02912,#02914

(Table 02914)
Call driver "get I/O character counts" function with:
        AH = 05h
        AL = port number (00h-0Fh)
        interrupts disabled
Return: CF clear if successful
            BX = number of bytes pending transmission
            CX = number of bytes available for reading
        CF set on error
        interrupts disabled
SeeAlso: #02912,#02913

(Table 02915)
Call driver "control XON/XOFF" function with:
        AH = 06h
        AL = port number (00h-0Fh)
        DL = new state
            (00h software flow control disabled, else enabled)
        interrupts disabled
Return: CF clear if successful
        CF set on error
        interrupts disabled
SeeAlso: #02916

(Table 02916)
Call driver "get error counts and statistics" function with:
        AH = 07h
        AL = port number (00h-0Fh)
        ES:BX -> buffer for statistics (see #02924)
        interrupts disabled
Return: CF clear if successful
            ES:BX buffer filled
        CF set on error
        interrupts disabled
SeeAlso: #02917,#02918,#02919

(Table 02917)
Call driver "general request" function with:
        AH = 08h
        AL = port number (00h-0Fh)
        DX = requested operations
            bit 0: flush transmit buffers
            bit 1: flush receive buffers
            bit 4: define XON/XOFF characters
        ES:BX -> XON/XOFF characters (see #02925) if DX bit 4 set
        interrupts disabled
Return: CF clear if successful
        CF set on error
        interrupts disabled

(Table 02918)
Call driver "deadman timer management" function with:
        AH = 09h
        AL = port number (00h-0Fh)
        BX = next time interval in seconds (0000h to disable timer)
        interrupts disabled
Return: CF clear
        interrupts disabled
SeeAlso: #02919

(Table 02919)
Call driver "get buffer sizes" function with:
        AH = 0Ah
        AL = port number (00h-0Fh)
        interrupts disabled
Return: CF clear if successful
           BX = size of transmit buffer
           CX = size of receive buffer
        CF set on error
        interrupts disabled
SeeAlso: #02918

(Table 02920)
Values for Access Server transmitter status:
 00h    uninitialized
 01h    ready, not transmitting
 02h    transmitting
 03h    XOFF received
 04h    transmitting, buffer full
 05h    XOFF received and buffer full

(Table 02921)
Values for Access Server receiver status:
 00h    uninitialized
 01h    ready
 02h    receive buffer full, data may have been lost

Bitfields for external status signals:
Bit(s)  Description     (Table 02922)
 7,6    undefined
 5      CTS active
 4      DSR active
 3      DCD active
 2,1    undefined
 0      ring indicator

Format of Access Server configuration parameter block:
Offset  Size    Description     (Table 02923)
 00h    BYTE    receive baud rate index
                00h 50 bps, 01h 75 bps, 02h 110 bps, 03h 134.5 bps,
                04h 150 bps, 05h 300 bps, 06h 600 bps, 07h 1200 bps,
                08h 1800 bps, 09h 2000 bps, 0Ah 2400 bps, 0Bh 3600 bps,
                0Ch 4800 bps, 0Dh 7200 bps, 0Eh 9600 bps, 0Fh 19200 bps,
                10h 38400 bps, 11h 57600 bps, 12h 115200 bps
 01h    BYTE    receive bits per character (0=5 bits..3=8 bits)
 02h    BYTE    receive stop bits
 03h    BYTE    receive parity
                00h none, 01h odd, 02h even, 03h mark, 04h space
 04h    BYTE    transmit baud rate index (same as receive baud rate)
 05h    BYTE    transmit bits per character (0=5 bits..3=8 bits)
 06h    BYTE    transmit stop bits
 07h    BYTE    transmit parity (same as receive parity)
 08h    BYTE    DTR state (00h off, 01h on)
 09h    BYTE    RTS state (00h off, 01h on)
 0Ah    BYTE    flow control (00h none, 01h XON/XOFF, 02h RTS/CTS, 03h both)
 0Bh    BYTE    break control (00h off, 01h on)

Format of Access Server statistics:
Offset  Size    Description     (Table 02924)
 00h    BYTE    port number
 01h    BYTE    external status signals (see #02922)
 02h    BYTE    transmitter status (see #02920)
 03h    BYTE    receiver status (see #02921)
 04h    DWORD   number of characters received
 08h    DWORD   number of characters transmitted
 0Ch    WORD    input parity errors
 0Eh    WORD    input framing errors
 10h    WORD    lost characters due to hardware overrun
 12h    WORD    lost characters due to data buffer overrun
Note:   the counts are not allowed to wrap around; once a count reaches FFFFh
          or FFFFFFFFh, it is no longer incremented

Format of Access Server XON/XOFF characters:
Offset  Size    Description     (Table 02925)
 00h    BYTE    04h (number of bytes following)
 01h    BYTE    transmit XON character
 02h    BYTE    transmit XOFF character
 03h    BYTE    receive XON character
 04h    BYTE    receive XOFF character
--------N-2F7AFE-----------------------------
INT 2F U - Novell NetWare - DOSNP.EXE - INSTALLATION CHECK
        AX = 7AFEh
Return: AL = FFh if present
            ES = (data???) segment of DOSNP
Program: DOSNP.EXE provides "named pipes" support for DOS workstations running
           NetWare
Note:   the NetWare shell calls this function and refuses to load if DOSNP is
          present
SeeAlso: AX=7A90h
--------N-2F7AFFBX0000-----------------------
INT 2F - Novell NetWare - TBMI v1.1+ - INSTALLATION CHECK / Windows SUPPORT
        AX = 7AFFh
        BX = 0000h
        CX = 4E65h ("Ne")
        DX = 7457h ("tW")
        ES:DI -> Windows support procedure (see #02926)
Return: AL = FFh if installed
            CX = configured sockets (14h)
            DS:SI -> data table ???
            ES:DI -> IPX far call handler
Notes:  for IPX/SPX this call reportedly returns DS:SI pointing to the table
          of pointers to service events queue head and tail
        this function is also supported by IPXODI; v2.12 does not change DS,
          but does set SI to an internal address
SeeAlso: AX=7AFFh/BX=0001h

(Table 02926)
Values Windows support procedure called with:
        BP = function
            0001h Get ECB
                BX = socket number
                Return: ES:SI -> ECB or 0000h:0000h if none available
            0002h Count Listen ECBs
                AX = BX = socket
                Return: CX = number of listen ECBs for socket
                                (must be >= 2 for SPX to work)
            0003h ???
            0004h Inform task switcher of ECB locations
                Note:   registers other than those listed above are equal
                          to the values when IPX was called
Note:   the support function will not be called if IPX is called with BX
          bit 15 set
--------N-2F7AFFBX0001-----------------------
INT 2F - Novell NetWare - TBMI v1.1+, shell v3.01d - INSTALLATION CHECK???
        AX = 7AFFh
        BX = 0001h
        CX = 4E65h ("Ne")
        DX = 7457h ("tW")
Return: AL = FFh if installed
            CX = ???  (8000h)
            SI = ??? (or -> ???) (0002h and 0007h seen)
            ES:DI -> IPX far call handler
            ES:DX -> 6-byte data area ???
Note:   this function is also supported by IPXODI, but IPXODI v2.12 does not
          return ES:DX
SeeAlso: AX=7AFFh/BX=0000h
--------d-2F7F00-----------------------------
INT 2F - Jim Harper's CD-ROM redirector SCSI driver - INSTALLATION CHECK
        AX = 7F00h
Return: AL = FFh if installed
SeeAlso: AX=7F01h"Harper",AX=7F02h"Harper",AX=7F03h"Harper"
--------P-2F7F00-----------------------------
INT 2F - PRINDIR v9.0 - INSTALLATION CHECK
        AX = 7F00h
Return: AL = FFh if installed
            BX = version (BH = major, BL = minor)
            CX:DX -> ASCIZ signature "PRINDIR"
Range:  AH=7Fh is the default, may be changed at installation time
Note:   prior versions of PRINDIR used INT 7C or INT 7A
SeeAlso: AX=7F01h"PRINDIR",AX=7F02h"PRINDIR",AX=7F03h"PRINDIR"
SeeAlso: AX=7F06h"PRINDIR",AX=7F08h,AX=7F0Ah,AX=7F0Ch,AX=7F0Eh,INT 7C"PRINDIR"
--------d-2F7F01-----------------------------
INT 2F - Jim Harper's CD-ROM redirector SCSI driver - DO COMMAND
        AX = 7F01h
        DS:DX -> command record (see #02927)
Return: AL = status
            00h successful
            else error code
SeeAlso: AX=7F00h"Harper",AX=7F02h"Harper",INT 11/AH=FFh"SDLP"
SeeAlso: INT 21/AX=4402h"ASPI",INT 4F/AX=8100h

Format of CD-ROM redirector command record:
Offset  Size    Description     (Table 02927)
 00h    BYTE    ID
 01h 10 BYTEs   CDB (Command Descriptor Block) for operation (see #03236,#03237)
 0Bh    WORD    segment of buffer
 0Dh    WORD    offset of buffer
 0Fh    BYTE    status
 10h    BYTE    sense
 12h    WORD    count
--------P-2F7F01-----------------------------
INT 2F - PRINDIR v9.0 - SET CAPTURE DEVICE
        AX = 7F01h
        DX = capture device (as used by /GET commandline option)
Return: AX = status
            0000h successful
            FFFFh invalid device
SeeAlso: AX=7F00h"PRINDIR",AX=7F02h"PRINDIR",AX=7F03h"PRINDIR"
SeeAlso: AX=7F05h"PRINDIR"
--------d-2F7F02-----------------------------
INT 2F - Jim Harper's CD-ROM redirector SCSI driver - DO RESET
        AX = 7F02h
SeeAlso: AX=7F00h,AX=7F01h
--------P-2F7F02-----------------------------
INT 2F - PRINDIR v9.0 - SET DESTINATION DEVICE
        AX = 7F02h
        DX = destination device number (as used by /PUT commandline option)
Return: AX = status
            0000h successful
            FFFFh invalid device number
SeeAlso: AX=7F00h"PRINDIR",AX=7F01h"PRINDIR",AX=7F04h"PRINDIR"
SeeAlso: AX=7F06h"PRINDIR"
--------d-2F7F03-----------------------------
INT 2F - Jim Harper's CD-ROM redirector SCSI driver - UNINSTALL
        AX = 7F03h
Return: AL = status
            00h successful
            01h unable to uninstall
SeeAlso: AX=7F00h
--------P-2F7F03-----------------------------
INT 2F - PRINDIR v9.0 - SET CAPTURE FILENAME
        AX = 7F03h
        CX:DX -> ASCIZ name of capture file
Return: AX = status
            0000h successful
            FFFFh name too long
SeeAlso: AX=7F00h"PRINDIR",AX=7F01h"PRINDIR",AX=7F04h"PRINDIR"
SeeAlso: AX=7F05h"PRINDIR",AX=7F07h"PRINDIR"
--------P-2F7F04-----------------------------
INT 2F - PRINDIR v9.0 - SET LOCK FILENAME
        AX = 7F04h
        CX:DX -> ASCIZ name of lock file
Return: AX = status
            0000h successful
            FFFFh invalid device number
SeeAlso: AX=7F00h"PRINDIR",AX=7F01h"PRINDIR",AX=7F03h"PRINDIR"
SeeAlso: AX=7F05h,AX=7F06h,AX=7F08h,AX=7F0Ah,AX=7F0Bh
--------P-2F7F05-----------------------------
INT 2F - PRINDIR v9.0 - DUMP CAPTURE BUFFER
        AX = 7F05h
Return: AX = status
            0000h successful
SeeAlso: AX=7F00h"PRINDIR",AX=7F01h"PRINDIR",AX=7F04h"PRINDIR",AX=7F06h
--------P-2F7F06-----------------------------
INT 2F - PRINDIR v9.0 - SET NORMAL TEXT COLOR
        AX = 7F06h
        DH = new attribute for normal text
Return: AX = status
            0000h successful
SeeAlso: AX=7F00h"PRINDIR",AX=7F01h"PRINDIR",AX=7F05h"PRINDIR",AX=7F07h
--------P-2F7F07-----------------------------
INT 2F - PRINDIR v9.0 - SET HIGHLIGHT TEXT COLOR
        AX = 7F07h
        DH = new attribute for highlighted text
Return: AX = status
            0000h successful
SeeAlso: AX=7F00h"PRINDIR",AX=7F01h"PRINDIR",AX=7F06h"PRINDIR",AX=7F08h
--------P-2F7F08-----------------------------
INT 2F - PRINDIR v9.0 - SET POPUP HOTKEY
        AX = 7F08h
        DH = new scancode for hotkey
Return: AX = status
            0000h successful
SeeAlso: AX=7F00h"PRINDIR",AX=7F05h"PRINDIR",AX=7F09h,AX=7F0Bh,AX=7F0Dh
--------P-2F7F09-----------------------------
INT 2F - PRINDIR v9.0 - SET BYTE COUNTER DISPLAY
        AX = 7F09h
        DH = new state (00h off, 01h on)
Return: AX = status
            0000h successful
SeeAlso: AX=7F00h"PRINDIR",AX=7F07h"PRINDIR",AX=7F08h,AX=7F0Ah,AX=7F0Ch
--------P-2F7F0A-----------------------------
INT 2F - PRINDIR v9.0 - SET FLUSH DELAY
        AX = 7F0Ah
        DX = number of clock ticks before flushing
Return: AX = status
            0000h successful
SeeAlso: AX=7F00h"PRINDIR",AX=7F07h"PRINDIR",AX=7F09h,AX=7F0Bh,AX=7F0Ch
--------P-2F7F0B-----------------------------
INT 2F - PRINDIR v9.0 - SET MINIMUM DUMP SIZE
        AX = 7F0Bh
        DX = number of kilobytes to accumulate before dumping
Return: AX = status
            0000h successful
SeeAlso: AX=7F00h"PRINDIR",AX=7F0Ah,AX=7F0Ch,AX=7F0Dh,AX=7F0Eh
--------P-2F7F0C-----------------------------
INT 2F - PRINDIR v9.0 - SET ECHO STATE
        AX = 7F0Ch
        DX = new state (00h echo off, 01h echo on)
Return: AX = status
            0000h successful
SeeAlso: AX=7F00h"PRINDIR",AX=7F0Ah,AX=7F0Bh,AX=7F0Dh,AX=7F0Eh
--------P-2F7F0D-----------------------------
INT 2F - PRINDIR v9.0 - SHOW POPUP PARAMETER MENU
        AX = 7F0Dh
Return: AX = status
            0000h successful
            else  failed
SeeAlso: AX=7F00h"PRINDIR",AX=7F0Ah,AX=7F0Bh,AX=7F0Ch,AX=7F0Eh
--------P-2F7F0E-----------------------------
INT 2F - PRINDIR v9.0 - SUBMIT BYTE TO CURRENT DESTINATION DEVICE
        AX = 7F0Eh
        DL = byte to send to destination device
Return: AX = status
            0000h successful
            else  failed
SeeAlso: AX=7F00h"PRINDIR",AX=7F0Ah,AX=7F0Bh,AX=7F0Ch,AX=7F0Dh
----------2F7F24-----------------------------
INT 2F - Multiplex - ???
        AX = 7F24h
        ???
Return: ???
Note:   called by PC/370, an IBM 370 emulator by Donald S. Higgins
----------2F7F26-----------------------------
INT 2F - Multiplex - ???
        AX = 7F26h
        ???
Return: ???
Note:   called by PC/370, an IBM 370 emulator by Donald S. Higgins
--------N-2F8000-----------------------------
INT 2F - EASY-NET - INSTALLATION CHECK
        AX = 8000h
Return: AL = 00h not installed
             FFh installed
Program: EASY-NET is a shareware two-machine serial-port network
--------N-2F8000-----------------------------
INT 2F - Nanosoft, Inc. TurboNET server - INSTALLATION CHECK
        AX = 8000h
Return: AL = FFh if installed
            BX = CS of resident code
            CX = ??? (03FCh)
Program: TurboNET is a NetBIOS-based file redirector and server; a
          demonstration version may be downloaded from Nanosoft's BBS
SeeAlso: AX=8100h
--------t-2F8000-----------------------------
INT 2F - CS_TSR specification - TSR INSTALLATION CHECK
        AX = 8000h
        DS:SI -> 4-byte CS_TSR signature (11h 43h 53h 10h)
Return: AL = status
            00h no CS_TSR-compliant TSRs installed
            01h installed, but signature did not match
            FFh installed, signature matches
                ES:DI -> resident process block (see #02928) of last installed
                          TSR (if DS:SI pointed at signature on entry)
Program: the CS_TSR specification is a standardized TSR interface by Compact
          Soft group in Kiev, Ukraine
Desc:   determine whether any CS_TSR-compliant TSRs are installed on the
          selected multiplex number
Range:  AH=80h to AH=FFh
SeeAlso: AX=8001h"CS_TSR",AX=8002h"CS_TSR",AX=8003h"CS_TSR"

Format of CS_TSR process block:
Offset  Size    Description     (Table 02928)
 00h  4 BYTEs   CS_TSR signature 11h 43h 53h 10h
 04h    BYTE    INT 2F multiplex number
 05h    WORD    virtual process handle (unique among loaded TSRs)
 07h  2 BYTEs   version (binary minor version, then major version)
 09h    WORD    PSP segment of TSR
 0Bh    DWORD   pointer to ASCIZ program name
 0Fh  3 BYTEs   program creation date (day, month, year)
 12h  3 BYTEs   process start time (seconds, minutes, hours)
 15h  3 BYTEs   process start date (day, month, year)
--------F-2F8000DX0000-----------------------
INT 2F - FaxBIOS interface - INSTALLATION CHECK
        AX = 8000h
        DX = 0000h
        DI = 0000h
Return: AL = FFh if installed
        DX:DI -> signature "FaxBiosjpc"
Range:  AH=80h to AH=FFh, selected by scanning multiplex numbers for signature
SeeAlso: AH=2Ah,AX=80FBh
--------N-2F8001-----------------------------
INT 2F - Nanosoft, Inc. TurboNET server - ???
        AX = 8001h
        DS:SI -> 16-byte buffer for ???
Return: AH = status
            00h successful
            01h error (TurboNET busy)
Note:   makes NetBIOS calls
--------t-2F8001-----------------------------
INT 2F - CS_TSR specification - GET HANDLE (TSR-SPECIFIC INSTALLATION CHECK)
        AX = 8001h
        DS:SI -> ASCIZ signature string for desired TSR (see #02929)
Return: BX = process handle or 0000h if specified TSR not installed
        ES:DI -> process block for TSR (see #02928) if BX<>0000h
Note:   A widely-available copy of ASCII billing itself as "ASCII 2.OO by
          Nick Zaikin Jr." is in fact a hacked copy of the Compact Soft
          ASCII v4.23 which is identical except for the changed attribution
          and version (in fact, some instances of "4.23" were missed); the
          hacked copy requires the signature string
          "ASCII 2.OO by Nick Zaikin Jr." instead of the unhacked version's
          simple signature "ASCII"
SeeAlso: AX=8000h"CS_TSR",AX=8002h"CS_TSR"

(Table 02929)
Values for CS_TSR signature strings:
 "ASCII"        ASCII, a popup ASCII table with character input
 "Halculator"   HALC, a 32-bit RPN WYSIWIH calculator with undo and ptr support
 "AntiTurbo"    AT!, an intelligent system slow-down utility
--------t-2F8002-----------------------------
INT 2F - CS_TSR specification - GET PROCESS BLOCK BY PROCESS HANDLE
        AX = 8002h
        BX = process handle for TSR (see AX=8001h"CS_TSR")
Return: ES:DI -> process block for specified TSR (see #02928)
                unchanged if no match for process handle
Note:   This function is used to allocate a process handle when the TSR
          installs itself, by setting ES:DI to point at something other than
          a CS_TSR process block's signature string and iterating through the
          possible process handles (0001h to FFFFh) until ES:DI is returned
          unchanged
SeeAlso: AX=8000h"CS_TSR",AX=8001h"CS_TSR",AX=8003h"CS_TSR"
--------t-2F8003-----------------------------
INT 2F - CS_TSR specification - CUSTOM SUBFUNCTION
        AX = 8003h
        BX = process handle for TSR (see AX=8001h"CS_TSR")
        other registers vary by TSR
Return: vary by TSR, unchanged if not supported
Program: the CS_TSR specification is a standardized TSR interface by Compact
          Soft group in Kiev, Ukraine
SeeAlso: AX=8000h"CS_TSR",AX=8001h"CS_TSR",AX=8002h"CS_TSR"
--------F-2F80FB-----------------------------
INT 2F - FaxBIOS interface - COMMAND SUBMISSION
        AX = 80FBh
        BX = function number (see #02930)
        DX:DI -> command buffer
                  (see #02932,#02935,#02936,#02937,#02938,#02939,#02944,#02950,#02957)
Return: AL = FFh if submitted OK
        CX = result code (see #02931)
Range:  AH=80h to AH=FFh, selected by scanning multiplex numbers for signature
SeeAlso: AX=8000h"FaxBIOS",AX=CBDDh

(Table 02930)
Values for FaxBIOS function number:
 0001h  SYS_LOGIN
 0002h  SYS_LOGOUT
 0003h  SYS_GET_FAXAPP_INFO
 0004h  STAT_IO_GET
 0005h  STAT_FAXBIOS_GET
 0006h  PDIR_OPEN
 0007h  PDIR_CLOSE (see #02940)
 0008h  PDIR_READ_PERSON (see #02941)
 0009h  PDIR_PARTIAL_READ
 000Ah  PDIR_READ_GROUP
 000Bh  PDIR_READ_MEMBER_LIST
 000Ch  PDIR_WRITE_PERSON
 000Dh  PDIR_WRITE_GROUP
 000Eh  PDIR_DELETE_PERSON
 000Fh  PDIR_DELETE_GROUP
 0010h  PDIR_READ_GROUP_LIST
 0011h  PDIR_IN_GROUP
 0012h  PDIR_OUT_GROUP
 0013h  SCHED_OPEN (see #02942)
 0014h  SCHED_ADD_DEST (see #02943)
 0015h  SCHED_ADD_FILE (see #02944)
 0016h  SCHED_SET_PARAMS (see #02945)
 0017h  SCHED_CANCEL (see #02942)
 0018h  SCHED_CLOSE (see #02946)
 0019h  SLOG_OPEN (see #02947)
 001Ah  SLOG_CLOSE (see #02947)
 001Bh  SLOG_SHORT_ENV_STAT
 001Ch  SLOG_LONG_ENV_STAT
 001Dh  SLOG_DEST_STAT
 001Eh  SLOG_FILE_STAT
 001Fh  SLOG_CANCEL_ENV
 0020h  RLOG_OPEN (see #02947)
 0021h  RLOG_CLOSE (see #02947)
 0022h  RLOG_READ
 0023h  GRAPH_GET_FILE_TYPE (see #02948)
 0024h  GRAPH_EXPORT_FILE
 0025h  GRAPH_GET_LAYOUT_INFO
 0026h  GRAPH_CREATE_FILE (see #02949)
 0027h  GRAPH_CLOSE_FILE (see #02950)
 0028h  GRAPH_CREATE_PAGE (see #02951)
 0029h  GRAPH_WRITE (see #02952)
 002Ah  GRAPH_END_PAGE
 002Bh  GRAPH_OPEN_FILE (see #02953)
 002Ch  GRAPH_GOTO_PAGE (see #02954)
 002Dh  GRAPH_READ (see #02955)
 002Eh  IOCTL_GET
 002Fh  IOCTL_SET
 0030h  IOCTL_ANSWER_FAX (see #02956)
 0031h  IOCTL_DIAL (see #02957)

(Table 02931)
Values for FaxBIOS result code:
 0000h  successful
 0001h  not prepared or servicing another client (busy)
 0002h  call failed due to sharing (LOCKED)
 0003h  logged-in client limit reached (FULL)
 0004h  transport denied (TRANSPORT_DENIED)
 0005h  not implemented (NOT_IMPLEMENTED)
 0006h  aborted while in progress (ABORTED)
 0007h  permissions denied (PERMISSION_DENIED)
 0008h  requested data is no longer valid (NO_LONGER_VALID)
 0080h  unspecified system error occurred
 0081h  an internal file was not found
 0082h  an internal file could not be created
 0083h  an internal file could not be opened
 0084h  an internal file could not be closed
 0085h  error occurred writing to an internal file
 0086h  error occurred reading from an internal file
 0087h  bad or corrupted file encountered
 0088h  an access violation occurred
 0089h  an internal file is empty
 008Ah  insufficient memory to process request
 008Bh  FaxBIOS was unable to issue a handle
 008Ch  an error internal to FaxBIOS occurred
 008Dh  no room on disk
 0100h  unspecified error accessing client file
 0101h  file not found
 0102h  creation fault
 0103h  open fault
 0104h  close fault
 0105h  write fault
 0106h  read fault
 0107h  file corrupted
 0108h  access violation
 0109h  empty file
 0200h  unspecified argument error
 0201h  bad function
 0202h  bad option
 0203h  bad structure size
 0204h  bad buffer size
 0205h  bad client ID
 0300h  unspecified error with token
 0301h  cover sheet token was invalid
 0302h  logo token was invalid
 0303h  signature token was invalid
 0304h  font token was invalid
 0305h  phone directory token was invalid
 0306h  outbound route token was invalid
 0307h  priority token was invalid
 0308h  sort token was invalid
 0309h  billing token was invalid
 0400h  unspecified handle error
 0401h  bad Phone Directory handle
 0402h  bad scheduling handle
 0403h  bad read send log handle
 0404h  bad read receive log handle
 0405h  bad graphics handle
 0500h  data passed in structure was invalid
 0501h  name field given is invalid
 0502h  phone number given is invalid
 0503h  poll code submitted is invalid
 0504h  file type constant was invalid
 0505h  BFT constant not defined or supported
 0506h  resolution not defined or supported
 0507h  page length not defined or supported
 0508h  page width not defined or supported
 0509h  date & time requested are ridiculous
 050Ah  Subject text was not an ASCIZ string
 050Bh  From text was not an ASCIZ string
 050Ch  requested envelope ID was not found
 050Dh  requested envelope ID is not valid
 050Eh  envelope requested was not found
 050Fh  destination index is out of range
 0510h  file index is out of range
 0511h  index into receive log is out of range
 0512h  file name specified was incomplete or invalid
 0513h  page selected was out of range
 0514h  bit width more than byte width
 0515h  mode for open is not defined
 0516h  person index is out of range
 0517h  person ID is out of range
 0518h  group index out of range or invalid
 0519h  group ID out of range or invalid
 051Ah  range of indices to read is invalid
 051Bh  group name given is invalid
 051Ch  field_to_use is badly specified
 051Dh  predicate invalid for field specified
 0600h  unspecified client procedure error
 0601h  device of interest is not present
 0602h  device of interest has been removed
 0603h  device of interest is not responding
 0604h  device of interest is disabled
 0605h  could not dial because device was in use
 0606h  maximum destination limit exceeded
 0607h  maximum file limit exceeded
 0608h  scheduling closed with no destination
 0609h  scheduling closed with no files or poll
 060Ah  scheduling closed with no parameters specified
 060Bh  file type specified does not match file
 060Ch  file type specified is not supported
 060Dh  file submitted is not exportable
 060Eh  file type specified is not imageable
 060Fh  error converting file
 0610h  envelope could not be cancelled
 0611h  Phone Directory is full
 0612h  record is already in the Phone Directory
 0613h  selected group in Phone Directory is full
 0614h  person is already in the group
 0615h  person is not in the group & cannot be removed
 0616h  a graphics file to be created already exists
 0617h  a graphics file to be read is empty
 0618h  GRAPH_CREATE_PAGE called before GRAPH_END_PAGE
 0619h  graph read or write attempted without goto or create
 061Ah  graph page contains no data
 061Bh  Phone Directory is already open for this client
 061Ch  schedule log is already open for this client
 061Dh  receive log is aready open for this client
 061Eh  Phone Directory function requires write mode
 0800h  denied exclusive use of the API

Format of FaxBIOS SYS_LOGIN command buffer:
Offset  Size    Description     (Table 02932)
 00h    WORD    structure size
 02h    WORD    function number
 04h    WORD    return code
 06h    WORD    client ID
 08h    WORD    API Major Version
 0Ah    WORD    API Minor Version
 0Ch    DWORD   reserved for manufacturer's use
 10h 22 BYTEs   manufacturer's ID
 26h    WORD    highest possible device number
 28h    WORD    maximum destinations per envelope
 2Ah    WORD    maximum files per envelope
 2Ch    WORD    FaxBIOS capabilities (see #02933)
 2Eh    DWORD   T.30 capabilities (see #02934)
 32h    WORD    IPC handle
 34h    DWORD   amount of memory needed to load
 38h    WORD    scope (00h for public, nonzero for private)
 3Ah  6 BYTEs   future expansion
 40h    WORD    structure size

Bitfields for FaxBIOS capabilities:
Bit(s)  Description     (Table 02933)
 0      transmit supported
 1      receive supported
 2      IOCTL supported
 3      IOCTL_DIAL supported
 4      IOCTL_ANSWER_FAX supported
 5      manual transmit supported
 6      optional phone services supported
 7      canonical phone objects
 8      seam with next supported

Bitfields for T.30 capabilities:
Bit(s)  Description     (Table 02934)
 0      low vertical resolution (minimum)
 1      high vertical resolution
 2      page width 107mm (4.21 in)
 3      page width 151mm (5.91 in)
 4      page width 215mm (8.46 in) (minimum)
 5      page width 255mm (10.04 in)
 6      page width 303mm (11.93 in)
 7      unused
 8      page length 297mm (11.69 in) (minimum)
 9      page length 364mm (14.33 in)
 10     page length 279mm (11 in)
 11     page length unlimited
 12     Group 4 resolution 300x300
 13     Group 4 resolution 400x400
 14     able to respond to poll from remote
 15     able to poll remote
 16     binary file transfer supported

Format of FaxBIOS SYS_LOGOUT command buffer:
Offset  Size    Description     (Table 02935)
 00h    WORD    structure size
 02h    WORD    function number
 04h    WORD    return code
 06h    WORD    client ID
 08h    DWORD   client tag (for client's internal use)
 0Ch  6 BYTEs   future expansion
 12h    WORD    structure size

Format of FaxBIOS SYS_GET_FAXAPP_INFO command buffer:
Offset  Size    Description     (Table 02936)
 00h 12 BYTEs   common data (see #02935)
 0Ch 80 BYTEs   FaxBIOS data
 5Ch 80 BYTEs   default cover
 ACh 80 BYTEs   default logo
 FCh 80 BYTEs   default signature
14Ch 80 BYTEs   default font 10
19Ch 80 BYTEs   default font 165
1ECh 80 BYTEs   default user font
23Ch 80 BYTEs   default Pdir
28Ch 80 BYTEs   default sort
2DCh 10 BYTEs   default bill
2E6h 10 BYTEs   default route
2F0h 40 BYTEs   default cover sheet form
318h 34 BYTEs   valid dial characters
33Ah  6 BYTEs   local country code
340h  6 BYTEs   local city or area code
346h  6 BYTEs   future expansion
34Ch    WORD    structure size

Format of FaxBIOS STAT_IO_GET command buffer:
Offset  Size    Description     (Table 02937)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    device number
 0Eh    WORD    current activity
 10h    WORD    number of rings (if ringing)
 12h    WORD    number of fascimiles transmitted
 14h    WORD    number of fascimiles received
 16h    WORD    status of last transmission
 18h    WORD    envelope number of last transmission
 1Ah    WORD    index of last destination in envelope
 1Ch    WORD    status of last reception
 1Eh    WORD    current page (if session in progress)
 20h 80 BYTEs   current file
 70h 104 BYTEs  remote number
 D8h 20 BYTEs   last name
 ECh 20 BYTEs   first name
100h 32 BYTEs   company name
120h 32 BYTEs   notes
140h    WORD    current envelope ID (if sending)
142h    WORD    total pages in transmission (if sending)
144h  6 BYTEs   future expansion
14h     WORD    structure size

Format of FaxBIOS STAT_FAXBIOS_GET command buffer:
Offset  Size    Description     (Table 02938)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    status ID
 0Eh    WORD    currenty FaxBIOS function number
 10h    WORD    current Client ID being serviced
 12h    WORD    number of things to do
 14h    WORD    number of them done
 16h    WORD    number of pages to do (if any)
 18h    WORD    number of them done
 1Ah    WORD    number of files to do
 1Ch    WORD    number of them done
 1Eh 80 BYTEs   current File
 6Eh    WORD    0 if all devices are idle
 70h    WORD    number of fascimiles transmitted
 72h    WORD    number of fascimiles received
 74h    WORD    status of last transmission in system
 76h    WORD    envelope ID of last transmission
 78h    WORD    index of last destination in envelope
 7Ah    WORD    status of last reception in system
 7Ch    DWORD   time of next transmission
 80h  6 BYTEs   future expansion
 86h    WORD    structure size

Format of FaxBIOS PDIR_OPEN command buffer:
Offset  Size    Description     (Table 02939)
 00h 12 BYTEs   common data (see #02935)
 0Ch 80 BYTEs   Phone Directory token
 5Ch 80 BYTEs   sort order token
 ACh    WORD    open Mode (0 = read, 1 = write)
 AEh    WORD    Phone Directory handle
 B0h    WORD    number of people
 B2h    WORD    number of groups
 B4h    WORD    bitmap of fields supported by partial read
 B6h  6 BYTEs   future expansion
 BCh    WORD    structure size

Format of FaxBIOS PDIR_CLOSE command buffer:
Offset  Size    Description     (Table 02940)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    Phone Directory handle
 0Eh  6 BYTEs   future expansion
 14h    WORD    structure size

Format of FaxBIOS PDIR_READ_PERSON command buffer:
Offset  Size    Description     (Table 02941)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    Phone Directory handle
 0Eh    WORD    retrieve by index
 10h    WORD    person ID or index
 12h    WORD    how many groups person is in
 14h    WORD    person ID
 16h 20 BYTEs   last name
 2Ah 20 BYTEs   first name
 3Eh 32 BYTEs   company
 5Eh 32 BYTEs   notes
 7Eh  6 BYTEs   FAX country code
 84h  6 BYTEs   FAX city/area code
 8Ah 14 BYTEs   FAX local number
 98h 14 BYTEs   FAX extension
 A6h 24 BYTEs   reserved
 BEh  6 BYTEs   voice country code
 C4h  6 BYTEs   voice city/area code
 CAh 14 BYTEs   voice local number
 D8h 14 BYTEs   voice extension
 E6h 24 BYTEs   reserved
 FEh 10 BYTEs   outbound routing information
108h 10 BYTEs   billing information, credit card etc
112h    DWORD   remote FAX capabilities
116h 21 BYTEs   T.30 poll code of FAX number
12Bh 15 BYTEs   reserved
13Ah  6 BYTEs   future expansion
140h    WORD    structure size

Format of FaxBIOS SCHED_OPEN, SCHED_CANCEL command buffer:
Offset  Size    Description     (Table 02942)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    scheduler handle
 0Eh  6 BYTEs   future expansion
 14h    WORD    structure size

Format of FaxBIOS SCHED_ADD_DEST command buffer:
Offset  Size    Description     (Table 02943)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    schedule handle
 0Eh    WORD    device number if manual send wanted
 10h    WORD    non-zero if poll desired
 12h    WORD    person ID
 14h 20 BYTEs   last name
 28h 20 BYTEs   first name
 3Ch 32 BYTEs   company
 5Ch 32 BYTEs   notes
 7Ch  6 BYTEs   FAX country code
 82h  6 BYTEs   FAX city/area code
 88h 14 BYTEs   FAX local number
 96h 14 BYTEs   FAX extension
 A4h 24 BYTEs   reserved
 BCh  6 BYTEs   voice country code
 C2h  6 BYTEs   voice city/area code
 C8h 14 BYTEs   voice local number
 D6h 14 BYTEs   voice extension
 E4h 24 BYTEs   reserved
 FCh 10 BYTEs   outbound routing information
106h 10 BYTEs   billing information, credit card etc
110h    DWORD   remote FAX capabilities
114h 21 BYTEs   T.30 poll code of FAX number
129h 15 BYTEs   reserved
138h  6 BYTEs   future expansion
13Eh    WORD    structure size
SeeAlso: #02944

Format of FaxBIOS SCHED_ADD_FILE command buffer:
Offset  Size    Description     (Table 02944)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    schedule handle
 0Eh    WORD    file type
                0000h unidentified
                0001h native file format
                0002h ASCII
                0003h FaxBIOS Tiff Class F
 10h 80 BYTEs   file name
 60h 80 BYTEs   font token
 B0h    WORD    conversion options bitmap
 B2h    WORD    resolution
                0000h standard 98 lines per inch, 204 dpi
                0001h fine 196 lines per inch, 204 dpi
                0002h Group4 300 dpi
                0003h Group4 400 dpi
 B4h    WORD    page length
                0000h 279 mm (11 in)
                0001h 297 mm (11.69 in)
                0002h 364 mm (14.33 in)
                0003h unlimited
 B6h    WORD    page width
                0000h 215 mm (8.46 in)
                0001h 255 mm (10.04 in)
                0002h 303 mm (11.93 in)
                0003h 151 mm (5.91 in)
                0004h 107 mm (4.21 in)
 B8h    WORD    binary file transfer specification
                0000h only as FAX
                0001h only as file (for non-faxable files)
                0002h as file when possible else FAX
 BAh    WORD    seam flag (nonzero for seam with next)
 BCh    WORD    delete flag (nonzero to delete when done)
 BEh  6 BYTEs   future expansion
 C4h    WORD    structure size
SeeAlso: #02943,#02945

Format of FaxBIOS SCHED_SET_PARAMS command buffer:
Offset  Size    Description     (Table 02945)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    scheduler handle
 0Eh    DWORD   time to send
 10h 10 BYTEs   priority token
 1Ch 80 BYTEs   logo file token
 6Ch 80 BYTEs   signature file token
 BCh 80 BYTEs   cover page token
10Ch 40 BYTEs   Subject text
134h 40 BYTEs   From text
15Ch    WORD    user ID
15Eh  6 BYTEs   future expansion
164h    WORD    structure size
SeeAlso: #02943,#02944,#02946

Format of FaxBIOS SCHED_CLOSE command buffer:
Offset  Size    Description     (Table 02946)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    scheduler handle
 0Eh    WORD    envelope ID generated
 10h  6 BYTEs   future expansion
 16h    WORD    structure size
SeeAlso: #02945

Format of FaxBIOS SLOG_OPEN, SLOG_CLOSE, RLOG_OPEN, RLOG_CLOSE command buffer:
Offset  Size    Description     (Table 02947)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    log handle
 0Eh    WORD    number of entries
 10h  6 BYTEs   future expansion
 16h    WORD    structure size

Format of FaxBIOS GRAPH_GET_FILE_TYPE command buffer:
Offset  Size    Description     (Table 02948)
 00h 12 BYTEs   common data (see #02935)
 0Ch 80 BYTEs   filename
 5Ch    WORD    file type
                0000h unidentified
                0001h native file format
                0002h ASCII
                0003h FaxBIOS Tiff Class F
 5Eh    WORD    bitmap of supported capabilities
 60h  6 BYTEs   future expansion
 66h    WORD    structure size
SeeAlso: #02949,#02950

Format of FaxBIOS GRAPH_CREATE_FILE command buffer:
Offset  Size    Description     (Table 02949)
 00h 12 BYTEs   common data (see #02935)
 0Ch 80 BYTEs   filename
 5Ch    WORD    graph handle
 5Eh  6 BYTEs   future expansion
 64h    WORD    structure size
SeeAlso: #02948,#02950,#02951

Format of FaxBIOS GRAPH_CLOSE_FILE, GRAPH_END_PAGE command buffer:
Offset  Size    Description     (Table 02950)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    graph handle
 0Eh  6 BYTEs   future expansion
 14h    WORD    structure size
SeeAlso: #02949,#02951

Format of FaxBIOS GRAPH_CREATE_PAGE command buffer:
Offset  Size    Description     (Table 02951)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    graph handle
 0Eh    WORD    resolution
 10h    WORD    page width
 12h  6 BYTEs   future expansion
 18h    WORD    structure size
SeeAlso: #02949,#02950,#02952

Format of FaxBIOS GRAPH_WRITE_PAGE command buffer:
Offset  Size    Description     (Table 02952)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    graph handle
 0Eh    DWORD   pointer to storage for image
 12h    WORD    band height in lines
 14h    WORD    width of page image in bytes
 16h    WORD    facsimile page width constant
 18h    WORD    width of page image in bits
 1Ah    WORD    number of bytes actually processed
 1Ch  6 BYTEs   future expansion
 22h    WORD    structure size
SeeAlso: #02951,#02953

Format of FaxBIOS GRAPH_OPEN_FILE command buffer:
Offset  Size    Description     (Table 02953)
 00h 12 BYTEs   common data (see #02935)
 0Ch 80 BYTEs   filename
 5Ch    WORD    file type
 5Eh    WORD    graph handle
 60h    WORD    number of pages
 62h  6 BYTEs   future expansion
 68h    WORD    structure size
SeeAlso: #02952,#02954

Format of FaxBIOS GRAPH_GOTO_PAGE command buffer:
Offset  Size    Description     (Table 02954)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    graph handle
 0Eh    WORD    page number
 10h    WORD    vertical resolution
 12h    WORD    page width
 14h    DWORD   page length
 18h  6 BYTEs   future expansion
 1Eh    WORD    structure size
SeeAlso: #02952,#02953,#02955

Format of FaxBIOS GRAPH_READ_PAGE command buffer:
Offset  Size    Description     (Table 02955)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    graph handle
 0Eh    DWORD   pointer to storage for image
 12h    WORD    band height in lines
 14h    WORD    width of page image in bytes
 16h    WORD    facsimile page width constant
 18h    WORD    width of page image in bits
 1Ah    WORD    number of bytes actually processed
 1Ch  6 BYTEs   future expansion
 22h    WORD    structure size

Format of FaxBIOS IOCTL_ANSWER_FAX command buffer:
Offset  Size    Description     (Table 02956)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    device number
 0Eh  6 BYTEs   future expansion
 14h    WORD    structure size
SeeAlso: #02957

Format of FaxBIOS IOCTL_DIAL command buffer:
Offset  Size    Description     (Table 02957)
 00h 12 BYTEs   common data (see #02935)
 0Ch    WORD    device number
 0Eh  6 BYTEs   country code
 14h  6 BYTEs   city or area code
 1Ah 14 BYTEs   local number
 28h 14 BYTEs   extension
 36h 14 BYTEs   reserved
 4Eh  6 BYTEs   future expansion
 54h    WORD    structure size
SeeAlso: #02956
--------N-2F8100-----------------------------
INT 2F U - Nanosoft, Inc. TurboNET redirector - INSTALLATION CHECK
        AX = 8100h
Return: AL = FFh if installed
Program: TurboNET is a NetBIOS-based file redirector and server; a
          demonstration version may be downloaded from Nanosoft's BBS
SeeAlso: AX=8000h"TurboNET"
--------N-2F8101-----------------------------
INT 2F U - Nanosoft, Inc. TurboNET redirector - ???
        AX = 8101h
Return: AL = ???
        DL = ???
--------N-2F8102-----------------------------
INT 2F U - Nanosoft, Inc. TurboNET redirector - ???
        AX = 8102h
Return: AL = ???
        DL = ???
--------N-2F8103-----------------------------
INT 2F U - Nanosoft, Inc. TurboNET redirector - GET MACHINE NAME???
        AX = 8103h
        ES:DI -> 17-byte buffer
Return: buffer filled
--------N-2F8104-----------------------------
INT 2F U - Nanosoft, Inc. TurboNET redirector - ???
        AX = 8104h
        BL = ???
        BH = ???
        CX = ???
        DX = ???
        DS:SI -> 16-byte buffer containing ???
Return: AL = 00h ???
--------N-2F8105-----------------------------
INT 2F U - Nanosoft, Inc. TurboNET redirector - ???
        AX = 8105h
        CX = ??? (don't change current value if 0000h)
        DX = ??? (don't change current value if 0000h)
Return: AL = 00h successful
--------s-2F8200-----------------------------
INT 2F - RESPLAY - SAMPLE/PLAYBACK
        AX = 8200h
        DX:DI -> start of sample space
        CX:BX = length in bytes
Return: AX = status (see #02958)
Program: RESPLAY is a freeware sound sampling/playback utility by Mark J. Cox
SeeAlso: AX=8201h"RESPLAY",AX=8210h

(Table 02958)
Values for RESPLAY status:
 1000h  successful
 2000h  not initialized (see AX=8210h)
 other  RESPLAY not installed
--------G-2F8200-----------------------------
INT 2F U - Nanosoft, Inc. CAPDOS - INSTALLATION CHECK
        AX = 8200h
Return: AL = FFh if installed
Program: CAPDOS is a TSR by Nanosoft, Inc. which allows INT 21h calls to be
          captured and recorded for later analysis
SeeAlso: AX=8100h,AX=8201h"CAPDOS",AX=8202h"CAPDOS",AX=8203h"CAPDOS"
SeeAlso: AX=8204h"CAPDOS"
--------s-2F8201-----------------------------
INT 2F - RESPLAY - INSTALLATION CHECK
        AX = 8201h
Return: AX = 7746h if installed
SeeAlso: AX=8202h"RESPLAY",AX=8210h
--------G-2F8201-----------------------------
INT 2F - Nanosoft, Inc. CAPDOS - CLEAR QUEUE
        AX = 8201h
Note:   resets queue of captured INT 21 calls
SeeAlso: AX=8200h"CAPDOS"
--------s-2F8202-----------------------------
INT 2F - RESPLAY - UNINSTALL
        AX = 8202h
Return: AX = status
            1000h successful
SeeAlso: AX=8201h"RESPLAY",AX=8210h"RESPLAY"
--------G-2F8202-----------------------------
INT 2F - Nanosoft, Inc. CAPDOS - START COLLECTION
        AX = 8202h
SeeAlso: AX=8200h"CAPDOS",AX=8203h"CAPDOS"
--------G-2F8203-----------------------------
INT 2F - Nanosoft, Inc. CAPDOS - STOP COLLECTION
        AX = 8203h
SeeAlso: AX=8200h"CAPDOS",AX=8202h"CAPDOS",AX=8204h"CAPDOS"
--------G-2F8204-----------------------------
INT 2F - Nanosoft, Inc. CAPDOS - GET QUEUE PARAMETERS
        AX = 8204h
Return: AH = flag: queue wrapped if nonzero
        BX = index of current start of queue
        CX = size of queue in entries
SeeAlso: AX=8200h"CAPDOS",AX=8202h"CAPDOS",AX=8205h"CAPDOS"
--------G-2F8205-----------------------------
INT 2F - Nanosoft, Inc. CAPDOS - GET QUEUE ITEM
        AX = 8205h
        BX = queue item number
Return: AX,BX,CX,DX,SI,DI,DS,ES as on entry to captured DOS call
SeeAlso: AX=8200h"CAPDOS",AX=8204h"CAPDOS"
--------s-2F8210-----------------------------
INT 2F - RESPLAY - INITIALIZE
        AX = 8210h
        BL = sound device number (see #02959)
        BH = sample rate in multiples of 250 Hz (14h to A0h)
        CL = direction
            00h playback
            01h sample
Return: AX = status (see #02958)
SeeAlso: AX=8200h"RESPLAY",AX=8220h"MODRES"

(Table 02959)
Values for RESPLAY sound device:
 00h    printer port LPT1
 01h    printer port LPT2
 02h    prototype board at I/O address 0300h
 03h    printer port (alternative LPT1)
 04h    internal speaker
--------s-2F8220-----------------------------
INT 2F - MODRES - PLAY MODULE
        AX = 8220h
        DX:CX -> MODPARM structure (see #02960)
Return: AX = status
            5722h succesful
            2000h parameters out of range
            other MODRES not installed
SeeAlso: AX=8221h,AX=8223h,AX=8225h,AX=8227h,AX=8200h"RESPLAY"

Format of MODPARM Structure:
Offset  Size    Description     (Table 02960)
 00h    WORD    signature 504Dh ("MP" = Modparm)
 02h    BYTE    output device (see #02962 at INT 2F/AX=8221h)
 03h    WORD    segment of start of main module (pattern) data
 05h 31 WORDs   segment of start of sample numbers 1-31
 43h    BYTE    pattern at which to start playing (00h to 7Fh)
 44h    BYTE    function
                00h play from pattern [offset 43h] until end of the song
                01h play indicated pattern [offset 43h] only
 45h    BYTE    Machine speed
                00h 10-12Mhz
                01h 12-25Mhz (default)
                02h 25Mhz+
                03h mix speed 10kHz (fast 8Mhz machines)
                04h mix speed 12kHz (10Mhz machines)
                05h mix speed 13kHz
                06h mix speed 8kHz (test for 8Mhz machines)
 46h    BYTE    allow >64k sample playing
                80h MOD has samples >64k in it
                else all samples in MOD are <64k
Notes:  Main module data and all samples must start on segment boundaries.
        In version 2.00 (ONLY) this function carries on playing (works in
          the background)
SeeAlso: #02961
--------s-2F8221-----------------------------
INT 2F - MODRES - INSTALLATION CHECK
        AX = 8221h
Return: AX = status
            5722h successful
            other MODRES not installed
        BX = BCD version number (BH = major, BL = minor)
        DX:CX -> Output Device structure (read-only) (see #02961)
SeeAlso: AX=8220h,AX=8222h,AX=8225h,AX=8227h

Format of Output Device structure [array]:
Offset  Size    Description     (Table 02961)
 00h 20 BYTEs   ASCIZ name of the output device
                (end of list if first char is FFh)
 14h    WORD    apparently always FFFFh
 16h    WORD    0000h if output device not available
                else first I/O port for the output device
 18h    WORD    second I/O port for the output device (for example
                  if it is stereo)
                000oh if only one port used or device is not available
 1Ah  7 BYTEs   ???
SeeAlso: #02960,#02962

(Table 02962)
Values for MODRES v1.52 output device index:
 00h    PC speaker
 01h    D/A Converter on LPT1
 02h    D/A Converter on LPT2
 03h    D/A Converter on LPT3
 04h    D/A Converter on LPT4
 05h    D/A Converter on LPT1&LPT2 (stereo)
 06h    D/A Converter on LPT1&LPT2 (mono)
 07h    Sound Blaster (port 02x0h)
 08h    User Defined D/A (mono)
 09h    User Defined D/A (stereo)
 0Ah    Stereo-on-1
 0Bh    Disney SS su LPT1
 0Ch    Disney SS su LPT2
 0Dh    Disney SS su LPT3
 0Eh    Disney SS su LPT4
Note:   this list may vary between versions of MODRES
--------s-2F8222-----------------------------
INT 2F - MODRES - UNINSTALL
        AX = 8222h
Return: AX = code segment of the program
Note:   this function does not release the TSRs memory; the caller must do so
SeeAlso: AX=8220h,AX=8221h,AX=8223h
--------s-2F8223-----------------------------
INT 2F - MODRES - PLAY SAMPLE
        AX = 8223h
        DX:CX -> SAMPARM structure (see #02963)
Return: AX = status
            5722h succesful
            2000h parameters out of range
            other MODRES not installed
SeeAlso: AX=8221h,AX=8224h,AX=8225h,AX=8226h

Format of SAMPARM Structure:
Offset  Size    Description     (Table 02963)
 00h    WORD    signature 5053h ("SP" = SAMPARM)
 02h    WORD    segment of start of sample to play
 04h    WORD    length of sample (IN WORD)
 06h    BYTE    output device (see #02962 at INT 2F/AX=8221h)
 07h    WORD    pitch to play (see #02964)
 09h    BYTE    volume (from 00h to 40h)
 0Ah    WORD    loop start
 0Ch    WORD    loop length
 0Eh    BYTE    machine speed (see INT 2F/AX=8220h)
SeeAlso: #02960

(Table 02964)
Values for Pitch to play::
 C 0 is 06B0h
 C#0 is 06B0h / 2^(1/12)
 D 0 is (06B0h / 2^(1/12)) / 2^(1/12)
 ...
Note:   C 1 is  06B0h / 2
        C 2 is  06B0h / 4
        etc.
SeeAlso: #02963
--------s-2F8224-----------------------------
INT 2F - MODRES - ???
        AX = 8224h
        DX:CX -> ???
Return: ???
SeeAlso: AX=8221h,AX=8223h,AX=8224h
--------s-2F8225-----------------------------
INT 2F - MODRES v2.00+ - GET LOCATION IN MOD
        AX = 8225h
Return: AL = status
           00h playing
           01h reached end or stopped
        AH = speed of MOD
        BX = position within pattern 0000h-0400h
        CL = position within the song (track number)
SeeAlso: AX=8220h,AX=8221h,AX=8223h,AX=8226h
--------s-2F8226-----------------------------
INT 2F - MODRES v2.00+ - STOP PLAYING
        AX = 8226h
Return: AX = status
            5722h succesful
            other MODRES not installed
Desc:   stops playing the MOD file before performing critical operations such
          as disk accesses
SeeAlso: AX=8220h,AX=8221h,AX=8223h,AX=8225h,AX=8227h
--------s-2F8227-----------------------------
INT 2F - MODRES - CONFIGURE
        AX = 8227h
        BX = function
            0001h set default playing speed (06h)
            0002h select output device
                CL = output device (see #02962 at INT 2F/AX=8221h)
Return: AX = status
            5722h succesful
            2000h parameters out of range
            other MODRES not installed
Note:   function 0001h should be called every time a new module is loaded
SeeAlso: AX=8220h,AX=8221h,AX=8222h,AX=8223h
----------2F86-------------------------------
INT 2F U - ???
        AH = 86h
        AL = function (at least 06h and 07h)
        ???
Return: ???
Note:   called by Codeview for Windows
SeeAlso: AH=44h
--------U-2F8900-----------------------------
INT 2F - WHOA!.COM - INSTALLATION CHECK
        AX = 8900h
Return: AL = state
            00h not installed
            FFh installed
Program: WHOA!.COM is a system slow-down utility by Brad D Crandall
SeeAlso: AX=8901h,AX=8902h
--------U-2F8901-----------------------------
INT 2F - WHOA!.COM - UNINSTALL
        AX = 8901h
Return: AL = status
            FDh successful
            FEh error
SeeAlso: AX=8900h
--------U-2F8902-----------------------------
INT 2F - WHOA!.COM - SET DELAY COUNT
        AX = 8902h
        BX = delay count (larger values slow system down more)
Return: AL = status
            FDh successful
            FEh error
Program: WHOA!.COM is a system slow-down utility by Brad D Crandall
SeeAlso: AX=8900h
--------U-2F9000-----------------------------
INT 2F U - RAID - INSTALLATION CHECK
        AX = 9000h
Return: AL = FFh if installed
Program: RAID (Resident AID) is a TSR utility program by Ross Neilson
          Wentworth that resides mostly in EMS
--------U-2F9001-----------------------------
INT 2F U - RAID - GET ???
        AX = 9001h
Return: DX:AX -> ???
SeeAlso: AX=9000h
--------U-2F9002-----------------------------
INT 2F U - RAID - GET RESIDENT SEGMENT
        AX = 9002h
Return: AX = segment of resident (conventional memory) portion
SeeAlso: AX=9000h
--------U-2F9003-----------------------------
INT 2F U - RAID - UNINSTALL
        AX = 9003h
Return: ???
SeeAlso: AX=9000h
--------U-2F9004-----------------------------
INT 2F U - RAID - GET ???
        AX = 9004h
Return: AX = first available paragraph past end of resident portion???
        CX destroyed
SeeAlso: AX=9000h
--------e-2F92-------------------------------
INT 2F - Network Courier E-Mail - API
        AH = 92h
        AL = function
            00h installation check
            01h uninstall
            02h pop down MICRO.EXE notification window
            03h ???
            04h ???
            05h ???
Return: ???
Program: The Network Courier is an electronic mail package by Consumers
          Software of Vancouver, BC which was bought by Microsoft in 1991 and
          renamed Microsoft Mail v3.0.
SeeAlso: AX=9400h,AX=9401h,AX=9402h,AH=9Ch
Index:  installation check;Network Courier E-Mail
Index:  uninstall;Network Courier E-Mail
--------R-2F9200-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - BUG
        AX = 9200h
Program: DRIVEMAP is a redirector which allows drives on computers connected
          over the parallel or serial ports to appear as local drives
BUG:    jumps to data because jump table entry is 0000h
Note:   DRIVEMAP returns AX=FFFFh if not a valid function number in AL
--------R-2F9201-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - CHECK IF MAPPED DRIVE
        AX = 9201h
        DL = drive number (01h = A:, etc.)
Return: AL = 92h if mapped drive
        AH may be destroyed (v8.0 DRIVEMAP returns AX=0000h if not mapped)
SeeAlso: AX=9204h,AX=920Bh
--------R-2F9202-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - UNINSTALL
        AX = 9202h
        BX = caller's CS
Return: AX = status
            0000h failed
            nonzero successful
SeeAlso: AX=9204h
--------R-2F9203-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - GET VERSION
        AX = 9203h
Return: AH = major version
        AL = minor version
        CX = segment of resident code
Note:   the DRIVEMAP included with PC Tools v8.0 is version 1.00
SeeAlso: AX=9204h,INT 16/AX=FF70h
--------R-2F9204-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - INSTALLATION CHECK
        AX = 9204h
Return: AX = 9200h if installed
           BL = ???
           CX = segment of resident code
Program: DRIVEMAP is a redirector which allows drives on computers connected
          over the parallel or serial ports to appear as local drives
SeeAlso: AX=9201h,AX=9202h,AX=9203h
--------R-2F9205-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - SET ???
        AX = 9205h
        BX = ??? to set
Return: CX = new value of ???
--------R-2F9206-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - ???
        AX = 9206h
        ???
Return: ???
--------R-2F9207-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - GET ???
        AX = 9207h
        ???
Return: AX = ???
--------R-2F9208-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - ???
        AX = 9208h
        ???
Return: ???
--------R-2F9209-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - ???
        AX = 9209h
        ???
Return: AX = ???
        BX = ???
        CX = ???
        DX = ???
--------R-2F920A-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - ???
        AX = 920Ah
        BX = ???
Return: AX = ??? or FFFBh on error
--------R-2F920B-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - SET DRIVE MAPPING
        AX = 920Bh
        BL = drive letter (41h ['A'] = A:, etc)
        CX = ??? (0000h removes mapping)
Return: AX = ??? or FFF8h on error
SeeAlso: AX=9201h,AX=920Dh
--------R-2F920C-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - ???
        AX = 920Ch
        ???
Return: AX = ??? (0002h)
        CX = ??? (0000h)
--------R-2F920D-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - GET DRIVE TYPE
        AX = 920Dh
        BL = drive letter (41h ['A'] = A:, etc)
Return: AX = type flags
                bit 0: ???
                bit 1: available
                bit 5: local
        BX = ???
        CX = segment of resident code (apparently an unintended side effect)
Program: DRIVEMAP is a redirector which allows drives on computers connected
          over the parallel or serial ports to appear as local drives
SeeAlso: AX=9218h,INT 16/AX=FF70h
--------R-2F920E-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - SET LPT MAPPING
        AX = 920Eh
        BX = port number (0-2)
        CX = ??? (0000h to unmap)
Return: ???
--------R-2F920F-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - GET ???
        AX = 920Fh
        ES:DI -> 3-byte buffer for ???
Return: CX = 0000h
        ES:DI buffer filled
--------R-2F9210-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - ???
        AX = 9210h
        ???
Return: ???
--------R-2F9211-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - GET ???
        AX = 9211h
        ES:DI -> 8-word buffer for ???
Return: CX = 0000h
        ES:DI buffer filled
--------R-2F9212-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - CRITICAL SECTION???
        AX = 9212h
        BX = phase
            0000h leave critical section???
            nonzero enter critical section???
--------R-2F9213-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - ???
        AX = 9213h
        BX = function number (0000h-000Bh)
        ???
Return: ???
--------R-2F9214-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - GET ???
        AX = 9214h
        ES:DI -> 6-word buffer for ???
Return: CX = 0000h
        AX = ???
        ES:DI buffer filled
--------R-2F9215-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - GET ???
        AX = 9215h
        ES:DI -> 100-word buffer for ???
Return: CX = 0000h
        ES:DI buffer filled
--------R-2F9216-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - ???
        AX = 9216h
        ES:DI -> ???
Return: ???
--------R-2F9217-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - ???
        AX = 9217h
        DS:SI -> 25-word buffer containing ???
Return: ???
--------R-2F9218-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - GET LPT TYPE???
        AX = 9218h
        BX = port number???
Return: AX = ???
        BX = ??? (0000h)
        CX = ??? (0000h)
Program: DRIVEMAP is a redirector which allows drives on computers connected
          over the parallel or serial ports to appear as local drives
--------R-2F9219-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - ???
        AX = 9219h
        ???
Return: ???
--------R-2F921A-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - ???
        AX = 921Ah
        ???
Return: AH = ???
        AL = ???
        BX = ???
--------R-2F921B-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - ???
        AX = 921Bh
        ???
Return: AX = ???
        CX = segment of resident code (apparently an unintended side effect)
--------R-2F921C-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - ???
        AX = 921Ch
        ???
Return: ???
--------R-2F921D-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - GET ???
        AX = 921Dh
Return: AX = ???
--------R-2F921E-----------------------------
INT 2F U - PC Tools v8.0 DRIVEMAP - ???
        AX = 921Eh
        ???
Return: ???
Program: DRIVEMAP is a redirector which allows drives on computers connected
          over the parallel or serial ports to appear as local drives
Note:   this function sets two variables to 24h each
SeeAlso: INT 16/AX=FF70h
--------V-2F93-------------------------------
INT 2F - InnerMission v1.7+ - INSTALLATION CHECK
        AH = 93h
        BX = CX = AX
Return: AL = state
            FFh if installed and BX=CX=AX on entry
                BX = segment of resident code
            01h if installed but BX or CX differ from AX (multiplex number not
                  available)
Program: InnerMission is a shareware graphical screen blanker by Kevin Stokes
SeeAlso: INT 14/AX=AA01h,INT 2F/AX=6400h
Index:  screen saver;InnerMission
--------e-2F9400-----------------------------
INT 2F - MICRO.EXE - INSTALLATION CHECK
        AX = 9400h
Return: AL = 07h or 08h if installed
Program: MICRO.EXE is a TSR of the Microsoft Mail part of Workgroup Connection
SeeAlso: AH=92h"Network Courier",AX=9401h,AX=9402h,AX=9403h,AX=9404h
SeeAlso: INT 21/AH=3Fh"WORKGRP.SYS"
--------e-2F9401-----------------------------
INT 2F - MICRO.EXE - SET ??? FLAG
        AX = 9401h
SeeAlso: AX=9400h,AX=9403h
--------e-2F9402-----------------------------
INT 2F - MICRO.EXE - ???
        AX = 9402h
        ???
Return: ???
SeeAlso: AX=9400h
--------e-2F9403-----------------------------
INT 2F - MICRO.EXE - SET ??? FLAG
        AX = 9403h
SeeAlso: AX=9400h,AX=9404h
--------e-2F9404-----------------------------
INT 2F - MICRO.EXE - CLEAR ??? FLAG
        AX = 9404h
        ES:DI -> name of executable from which MICRO.EXE was started
Note:   if the specified name is identical to the name of the program file
          from which MICRO was started, the ??? flag is cleared; otherwise,
          it is left unchanged
SeeAlso: AX=9400h,AX=9403h
--------V-2F96C7-----------------------------
INT 2F U - STRETCH - INSTALLATION CHECK
        AX = 96C7h
Return: AX = AAAAh if installed
Program: stretch.exe is a TSR for Toshiba Laptops with WD90C24 video chip
          to avoid blank screen areas in VGA text modes by increasing
          inter-line spacing
----------2F97-------------------------------
INT 2F U - Micro Focus COBOL v3.1.31 internal - ???
        AH = 97h
        AL = function
            00h installation check
                Return: AL = FFh if installed
            08h get ???
                Return: AL = ???
                        BX = ???
                        DX = ???
                        AH destroyed
            20h get ???
                Return: AX:BX = far entry point of ???
                        CX = segment of ???
            80h ???
                Return: ???
Notes:  Micro Focus COBOL compiler v3.1.31 and companion programs supply
          these functions for internal use; these programs call the
          installation check at startup (before installing the INT 2F
          handler) and crash the system if a not authorized program answers
          with AL=FFh
        the handler checks AL only if an internal flag is 1, otherwise ???
SeeAlso: AH=98h"COBOL",AH=99h"COBOL",AH=9Ah"COBOL"
----------2F98-------------------------------
INT 2F U - Micro Focus COBOL v3.1.31 internal - ???
        AH = 98h
        AL = function
            00h installation check
                Return: AL = FFh if installed
            10h get ???
                Return: AX = ???
            18h get segment of ???
                Return: AX = segment of ???
            19h get pointer to ???
                Return: AX:BX -> ???
Notes:  Micro Focus COBOL compiler v3.1.31 and companion programs supply
          these functions for internal use; these programs call the
          installation check at startup (before installing the INT 2F
          handler) and crash the system if a not authorized program answers
          with AL=FFh
        the handler checks AL only if an internal flag is 0, otherwise ???
SeeAlso: AH=97h"COBOL",AH=99h"COBOL",AH=9Ah"COBOL"
--------V-2F9800-----------------------------
INT 2F U - S3RMDRV.SYS - INSTALLATION CHECK / VERSION CHECK
        AX = 9800h
        BX = function
            0000h installation check
                Return: AX = 524Dh ('RM') if installed
            0001h get driver version
                Return: AX = driver version (AH=major, AL=BCD minor)
Program: S3RMDRV.SYS provides support for the S3 MPEG driver FMPDRV
SeeAlso: AX=9803h
--------V-2F9803-----------------------------
INT 2F U - S3RMDRV.SYS - COPY ??? INTO USER BUFFER
        AX = 9803h
        DX:BX -> 116-byte buffer for ASCIZ ???
Return: AX = 0000h
        DX:BX buffer filled with string stored in driver from its parameter
          list when it was loaded
Note:   the examined version of the driver returns CF set for any AL other
          than 00h or 03h
SeeAlso: AX=9800h
----------2F99-------------------------------
INT 2F U - Micro Focus COBOL v3.1.31 internal - ???
        AH = 99h
        ???
Return: ???
Note:   used internally by Micro Focus COBOL compiler v3.1.31 and companion
          programs
SeeAlso: AH=97h"COBOL",AH=98h"COBOL",AH=9Ah"COBOL"
--------l-2F9900-----------------------------
INT 2F U - DOS Navigator II - INSTALLATION CHECK
        AX = 9900h
Return: BX = 444Eh ('DN') if installed
            AX = number of DOS Navigator executions
            CL = child process exit code
            DX = version number (see #02965)
Notes:  old versions of DOS Navigator II always returned AH=1, while newer
          ones return AH=0 and store AL in the DN.FLG file
Program: DOS Navigator is a multi-window shell for MS-DOS by RIT S.R.L.
          DOS Navigator(TM) is a registered trademark of RIT S.R.L.
SeeAlso: AX=9901h,AX=9902h,AX=9903h,AX=9904h,AX=9905h,AX=9906h

(Table 02965)
Values for DOS Navigator II version code:
 2100h  version 1.35
 2138h  version 1.38
 2141h  version 1.41
 2150h  version 1.50
--------l-2F9901-----------------------------
INT 2F U - DOS Navigator II - RETURN POINTER TO COMMAND LINE
        AX = 9901h
Return: ES:BX -> command line (terminated with 0Dh)
        AX = ES
SeeAlso: AX=9900h,AX=9902h,AX=9903h
--------l-2F9902-----------------------------
INT 2F U - DOS Navigator II - SET 'TRUE' EXIT CODE OF DN.PRG
        AX = 9902h
        CL = exit code
Return: AX destroyed
SeeAlso: AX=9900h,AX=9901h,AX=9903h
--------l-2F9903-----------------------------
INT 2F U - DOS Navigator II - SPECIFY HOW TO EXECUTE COMMANDS
        AX = 9903h
        CL = 1 to use INT 2E
        CL <> 1 to use INT 21/AH=4Bh
SeeAlso: AX=9900h,AX=9901h,AX=9902h
--------l-2F9904-----------------------------
INT 2F U - DOS Navigator II v1.49 - SET ???
        AX = 9904h
        CX:DX = new value for ???
SeeAlso: AX=9900h,AX=9905h,AX=9906h
--------l-2F9905-----------------------------
INT 2F U - DOS Navigator II v1.49 - GET ???
        AX = 9905h
Return: CX:DX = current value of ??? (set by AX=9904h)
SeeAlso: AX=9900h,AX=9904h,AX=9906h
--------l-2F9906-----------------------------
INT 2F U - DOS Navigator II v1.49 - GET ???
        AX = 9906h
        DX = new value for ??? (bit 15 must be set, otherwise not changed)
Return: CX = previous value for ???
SeeAlso: AX=9900h,AX=9904h,AX=9905h
----------2F9A-------------------------------
INT 2F U - Micro Focus COBOL v3.1.31 internal - ???
        AH = 9Ah
        ???
Return: ???
Note:   used internally by Micro Focus COBOL compiler v3.1.31 and companion
          programs
SeeAlso: AH=97h"COBOL",AH=98h"COBOL",AH=99h"COBOL"
--------e-2F9C-------------------------------
INT 2F - Network Courier E-Mail OPERATOR.EXE - API
        AH = 9Ch
        AL = subfunction
            01h uninstall
Return: ???
Program: The Network Courier is an electronic mail package by Consumers
          Software of Vancouver, BC which was bought by Microsoft in 1991 and
          renamed Microsoft Mail v3.0.
SeeAlso: AH=92h
Index:  uninstall;Network Courier E-Mail OPERATOR.EXE
--------G-2F9E00-----------------------------
INT 2F U - INTMON v2.1 - INSTALLATION CHECK
        AX = 9E00h
Return: AX = FFFFh if installed
            BX = segment of resident code
Program: INTMON is a shareware interactive interrupt monitoring TSR for 386
          and higher machines by Celso Minnitti, Jr.
SeeAlso: AX=9E01h,AX=9E02h,AX=9E03h,AX=9F00h
--------G-2F9E01-----------------------------
INT 2F U - INTMON v2.1 - RESET
        AX = 9E01h
Return: ???
Desc:   this function specifies that INTMON should assume that any interrupts
          on which it is currently awaiting a return have completed (i.e.
          interrupts which never return such as INT 20 and INT 27)
SeeAlso: AX=9E00h,AX=9E03h
--------G-2F9E02-----------------------------
INT 2F U - INTMON v2.1 - DISPLAY CPU REGISTERS???
        AX = 9E02h
Return: ???
SeeAlso: AX=9E00h
--------G-2F9E03-----------------------------
INT 2F U - INTMON v2.1 - HOOK INTERRUPT???
        AX = 9E03h
        BH = interrupt number???
Return: ???
Note:   if AL > 03h on entry, INTMON 2.1 returns immediately
SeeAlso: AX=9E00h,AX=9E01h
--------G-2F9F00-----------------------------
INT 2F U - INTCFG v2.1 - INSTALLATION CHECK
        AX = 9F00h
Return: AX = FFFFh if installed
Program: INTCFG is an optionally-resident control program for INTMON by Celso
          Minnitti, Jr.
SeeAlso: AX=9E00h,AX=9F01h,AX=9F30h,AX=9F49h
--------G-2F9F01-----------------------------
INT 2F U - INTCFG v2.1 - ???
        AX = 9F01h
        ???
Return: ???
SeeAlso: AX=9F00h
--------G-2F9F30-----------------------------
INT 2F U - INTCFG v2.1 - GET ???
        AX = 9F30h
Return: AX = ??? (0002h)
SeeAlso: AX=9F00h
--------G-2F9F49-----------------------------
INT 2F U - INTCFG v2.1 - UNINSTALL
        AX = 9F49h
Return: AX,DX,DS,ES destroyed
SeeAlso: AX=9F00h
--------E-2FA1--BX0081-----------------------
INT 2F - Ergo DOS extenders - INSTALLATION CHECK
        AH = A1h
        BX = 0081h
        AL = which
            FEh OS/286,OS/386
            FFh HummingBoard DOS extender
        ES:DI -> 16-byte buffer
Return: if installed, first four bytes of ES:DI buffer are "IABH"
Note:   since TKERNEL is a licensed version, it is likely that subfunctions
          BX=0082h and BX=0084h are present and function identically to the
          AX=FBA1h/BX=008xh calls
SeeAlso: AX=ED00h,AX=FBA1h/BX=0081h,INT 15/AX=BF02h
--------m-2FA189-----------------------------
INT 2F U - Biologic HRAMDEV.SYS - API
        AX = A189h
        BX = subfunction
            0000h set ???
            0001h remove ???
            0002h get status ???
            0003h enable ???
            0004h disable ???
            0005h set ??? flag
            0006h clear ??? flag
            0007h set ??? flag
            0008h clear ??? flag
            0009h set ???
        ES:DI -> function-specific arguments
                if func 0000h: 20-byte buffer containing ???
                if func 0001h: 20-byte buffer for returned ???
                if func 0002h: 16-byte buffer for returned ???
                if func 0009h: WORD containing ???
Return: BX = A189h if installed
        AH = status
            00h successful
            FFh failed or invalid function number
Program: HRAMDEV.SYS is a part of the shareware package HRAM by Biologic which
          provides improved high memory access under MS-DOS 5.0
Note:   functions 00h and 01h use a stack of four entries; function 01h always
          removes the values stored with the most recent function 00h call
          which has not yet been matched with a function 01h call.
--------U-2FA4E0-----------------------------
INT 2F - Futurus Team - INSTALLATION CHECK
        AX = A4E0h
Return: AL = 52h ("R") if installed
            AH = major version plus 30h ("0")
            ES:BX -> ??? (INT A4 handler???)
Note:   older versions of Right Hand Man (from which Team evolved) store the
          signature "RH" at offset 103h in the INT 2F handler's segment
SeeAlso: INT A4"Right Hand Man"
--------U-2FA900-----------------------------
INT 2F - METZTSR.COM - INSTALLATION CHECK
        AX = A900h
        CF set
Return: CF clear if resident
            AX = 97FFh
        CF set if not present
Notes:  METZTSR.COM prevents METZ applications (such as the MAGIC screen
          saver) inactivity timeout while running a DOSapp under MS Windows.
        the default multiplex number is A9h, but may be set to any value from
          80h to FFh with a commandline switch
SeeAlso: AX=A901h,AX=A902h
--------U-2FA901-----------------------------
INT 2F - METZTSR.COM - GET TIME OF LAST KEYBOARD ACTIVITY
        AX = A901h
        CF set
Return: CF clear if successful
            AX:DX = BIOS time at which INT 09 was last invoked
        CF set if not present
SeeAlso: INT 09,INT 1A/AH=00h
--------U-2FA902-----------------------------
INT 2F - METZTSR.COM - SET METZ Ctrl-Alt-Del FLAG
        AX = A902h
        BL = new value
            00h Ctrl-Alt-Del not allowed
            else Ctrl-Alt-Del allowed (startup default is 01h)
        CF set
Return: CF clear if successful
            AX = 97FFh
        CF set if not resident
SeeAlso: AX=A903h
--------U-2FA903-----------------------------
INT 2F - METZTSR.COM - GET METZ Ctrl-Alt-Del FLAG
        AX = A903h
        CF set
Return: CF clear if successful
            AX = 97FFh if Ctrl-Alt-Del allowed
            AX = 0000h if Ctrl-Alt-Del not allowed
        CF set if not resident
SeeAlso: AX=A902h
--------U-2FAA-------------------------------
INT 2F - Player's Tool 3.996b+ - UNINSTALL
        AH = AAh
Return: AL = status
            00h unloaded successfully
            01h unable to unload: in DOS shell
Program: Player's Tool is a game cheater by Dima Yakunin & Andy Robinson
SeeAlso: AH=ABh"Player's Tool",AH=ACh"Player's Tool",INT 10/AH=AAh
--------U-2FAA00-----------------------------
INT 2F - VIDCLOCK.COM - INSTALLATION CHECK
        AX = AA00h
Return: AL = 00h not installed
             FFh installed
Program: VIDCLOCK.COM is a memory-resident clock by Thomas G. Hanlin III
--------U-2FAB-------------------------------
INT 2F - Player's Tool 3.996b+ - INSTALLATION CHECK
        AH = ABh
Return: BH = FFh if installed
            BL = DOS shell state
                01h in DOS shell
                00h not in DOS shell
SeeAlso: AH=AAh"Player's Tool",AH=ACh"Player's Tool",INT 10/AH=ABh
--------f-2FAB00-----------------------------
INT 2F - Btrieve Multi-User - INSTALLATION CHECK
        AX = AB00h
Return: AL = 4Dh if installed
SeeAlso: AX=AB01h,AX=AB02h,INT 7B"Btrieve"
----------2FAB00-----------------------------
INT 2F - SRSoft MODAL PC v2+ - INSTALLATION CHECK / GET VERSION
        AX = AB00h
Return: AX = 5253h ('SR' byte-swapped) if installed
            BX = MODAL PC version (BL = major, BH = minor)
Program: MODAL PC is an algorithm/real-system simulation package by SR Soft
          using Petri-nets to describe simulated objects
SeeAlso: AX=AB01h"MODAL",AX=AB02h"MODAL",AX=AB06h"MODAL"
--------f-2FAB01-----------------------------
INT 2F - Btrieve Multi-User - EXECUTE Btrieve OPERATION
        AX = AB01h
        BX = process ID
        DS:DX -> 38-byte parameter record (see #03840 at INT 7B"Btrieve")
Return: AL = status
            00h OK
            other retry after calling INT 7F/AX=0200h
SeeAlso: AX=AB00h"Btrieve",AX=AB02h"Btrieve",INT 7B"Btrieve",INT 7F/AX=0200h
----------2FAB01-----------------------------
INT 2F - SRSoft MODAL PC v2+ - GET PROCESS RUN PARAMETER
        AX = AB01h
Return: AX = 5253h ('SR' byte-swapped) if installed
        BL = run parameter
            00h normal process
            01h run with tracing enabled
            02h run initialization process (first thread of main task)
SeeAlso: AX=AB00h"MODAL",AX=AB02h"MODAL"
--------f-2FAB02-----------------------------
INT 2F - Btrieve Multi-User - GET NEW PROCESS ID
        AX = AB02h
Return: AL = 00h successful
            BX = process ID
        AL > 00h failed, retry after calling INT 7F/AX=0200h
SeeAlso: AX=AB00h,AX=AB01h,INT 7B"Btrieve",INT 7F/AX=0200h
----------2FAB02-----------------------------
INT 2F - SRSoft MODAL PC v2+ - SET PROCESS EXIT CODE
        AX = AB02h
        BL = exit code
Return: AX = 5253h ('SR' byte-swapped) if installed
SeeAlso: AX=AB00h"MODAL",AX=AB01h"MODAL",AX=AB03h"MODAL"
----------2FAB03-----------------------------
INT 2F - SRSoft MODAL PC v2+ - ALLOCATE COMMON MEMORY
        AX = AB03h
        BX = required size of common memory for variables/semaphores in bytes
Return: AX = 5253h ('SR' byte-swapped) if installed
SeeAlso: AX=AB00h"MODAL",AX=AB02h"MODAL",AX=AB04h"MODAL"
----------2FAB04-----------------------------
INT 2F - SRSoft MODAL PC v2+ - GET ALL COMMON VARIABLES AND SEMAPHORES
        AX = AB04h
        DS:DX -> buffer for common data
Return: AX = 5253h ('SR' byte-swapped) if installed
        CF clear if successful
        CF set on error
SeeAlso: AX=AB00h"MODAL",AX=AB03h"MODAL",AX=AB05h"MODAL",AX=AB06h,AX=AB07h
----------2FAB05-----------------------------
INT 2F - SRSoft MODAL PC v2+ - SET ALL COMMON VARIABLES AND SEMAPHORES
        AX = AB05h
        DS:DX -> buffer containing common data
Return: AX = 5253h ('SR' byte-swapped) if installed
        CF clear if successful
        CF set on error
SeeAlso: AX=AB00h"MODAL",AX=AB03h"MODAL",AX=AB04h"MODAL",AX=AB06h,AX=AB07h
----------2FAB06-----------------------------
INT 2F - SRSoft MODAL PC v2+ - GET A COMMON VARIABLE OR SEMAPHORE
        AX = AB06h
        BX = offset of variable or semaphore in common memory
        CX = variable/semaphore size in bytes
        DS:DX -> buffer for variable or semaphore
Return: AX = 5253h ('SR' byte-swapped) if installed
        CF clear if successful
        CF set on error
SeeAlso: AX=AB00h"MODAL",AX=AB04h,AX=AB05h,AX=AB07h
----------2FAB07-----------------------------
INT 2F - SRSoft MODAL PC v2+ - SET A COMMON VARIABLE OR SEMAPHORE
        AX = AB07h
        BX = offset of variable or semaphore in common memory
        CX = variable/semaphore size in bytes
        DS:DX -> buffer containing variable or semaphore
Return: AX = 5253h ('SR' byte-swapped) if installed
        CF clear if successful
        CF set on error
SeeAlso: AX=AB00h"MODAL",AX=AB04h,AX=AB05h,AX=AB06h
--------U-2FAC-------------------------------
INT 2F u - Player's Tool 3.996b+ - POP UP
        AH = ACh
Return: AX = 1001h
SeeAlso: AH=AAh"Player's Tool",AH=ABh"Player's Tool"
--------V-2FAC00-----------------------------
INT 2F - DOS 4.01+ GRAPHICS.COM - INSTALLATION CHECK
        AX = AC00h
Return: AX = FFFFh
        ES:DI -> ??? (graphics data?) (not documented)
Note:   this installation check was moved here to avoid the conflict with the
          CD-ROM extensions that occurred in DOS 4.00
SeeAlso: AX=1500h"GRAPHICS"
--------V-2FAC00DI1092-----------------------
INT 2F - QRIP/TSR - GIVE CPU TO QRIP
        AX = AC00h
        DI = 1092h
Return: nothing
Program: QRIP/TSR is a shareware TSR by Shane Hathaway implementing the Remote
          Imaging Protocol (RIP, RIPscrip) used by several BBS systems to
          provide a graphical user interface
Desc:   give QRIP some CPU time to update music and flashing timers
Notes:  if DI <> 1092h on entry, QRIP chains the call
        this function should be called regularly whenever the terminal program
          is otherwise idle; the updates are automatically performed on any
          other QRIP call
SeeAlso: AX=AC01h,AX=ACF0h
--------V-2FAC01DI1092-----------------------
INT 2F - QRIP/TSR - CHANGE INTERNAL FLAGS
        AX = AC01h
        DI = 1092h
        BX = flags to be turned on (see #02966)
        CX = flags to be turned off (see #02966)
Return: AX = 9142h if installed
            DX = DOS-takeover flag (nonzero if QRIP able to take over DOS)
            ---if DX nonzero---
            BX = QRIP version number in hex (BH = major, BL = minor)
            CX = new flags (see #02966)
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC00h/DI=1092h,AX=ACF0h

Bitfields for QRIP internal flags:
Bit(s)  Description     (Table 02966)
 0      ANSI emulation enabled (default on)
 1      RIP emulation enabled (default on)
 2      graphical commands allowed (default on)
 3      TTY text allowed (default on)
 4      disable @ variables (default off in TSR mode)
 5      wait for key on RIP "end scene" command (default off)
 6      anti-stripping (default off in TSR mode)
 7      sound enabled (default on)
 8      automatic message filter (default off in TSR mode)
 9      display-only mode (no user prompts)
 10     TTY text suppression (default off in TSR mode)
 11-15  reserved
--------V-2FAC02DI1092-----------------------
INT 2F - QRIP/TSR - TURN OFF GRAPHICS SCREEN
        AX = AC02h
        DI = 1092h
Return: nothing
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC03h,AX=ACF0h
--------V-2FAC03DI1092-----------------------
INT 2F - QRIP/TSR - TURN ON GRAPHICS SCREEN
        AX = AC03h
        DI = 1092h
Return: nothing
Notes:  if DI <> 1092h on entry, QRIP chains the call
        this function does not restore the contents of the screen (see AX=AC15h)
SeeAlso: AX=AC02h,AX=AC14h,AX=AC15h
--------V-2FAC04DI1092-----------------------
INT 2F - QRIP/TSR - OUTPUT STRING THROUGH QRIP
        AX = AC04h
        DI = 1092h
        DX:BX -> string
        CX = length of string
Return: nothing
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC05h,AX=AC09h,AX=AC0Ah,AX=ACF0h
--------V-2FAC05DI1092-----------------------
INT 2F - QRIP/TSR - OUTPUT NULL-TERMINATED STRING THROUGH QRIP
        AX = AC05h
        DI = 1092h
        DX:BX -> ASCIZ string
Return: nothing
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC04h,AX=AC06h,AX=AC09h,AX=AC0Ah,AX=ACF0h
--------V-2FAC06DI1092-----------------------
INT 2F - QRIP/TSR - RECEIVE CHARACTERS FROM QRIP
        AX = AC06h
        DI = 1092h
Return: AX = character to send to BBS (0001h-00FFh) or special code (see #02967)
        BX = string-waiting flag
            0001h entire string waiting to be sent to terminal (call AX=AC0Ch)
        CX = DX = AX
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC04h,AX=AC05h,AX=AC0Ch,AX=AC16h,AX=AC18h,AX=AC1Ah

(Table 02967)
Values for QRIP special codes:
 0000h  if none
 0100h  wait for user keypress (must call AX=AC16h/BL=00h or AX=AC18h)
 0101h  both/middle mouse button pressed
 0102h  entering block mode (up/download) (call AX=AC1Ah)
 0103h  right mouse button pressed
 0104h  BBS requested status bar on
 0105h  BBS requested status bar off
 0106h  BBS requested VT-102 terminal emulation
        (keypad keys should send VT-102 escape codes)
 0107h  BBS requested VT-102 mode off
 0108h  BBS requested doorway mode (raw IBM keyboard ASCII/scan code pairs)
 0109h  BBS requested doorway mode off
 010Ah  hotkey mode on
 010Bh  hotkey mode off
 010Ch  BBS requested Tab-key button changing on
 010Dh  BBS requested Tab-key mode off
 010Eh  XOFF (use flow control to stop incoming characters)
 010Fh  XON (use flow control to resume incoming characters)
 0110h-0119h BBS requested application (0-9) be run
        application 0 should be a standard text editor
 01FFh  send ASCII 00h to BBS
Note:   for special codes 0104h to 010Dh, the terminal program should report
          any mode changes it make in response by calling AX=AC16h
--------V-2FAC07DI1092-----------------------
INT 2F - QRIP/TSR - GET FONT DIRECTORY
        AX = AC07h
        DI = 1092h
Return: DX:BX -> 80-byte internal buffer containing ASCIZ font directory name
Notes:  if DI <> 1092h on entry, QRIP chains the call
        the application may change the font directory by overwriting the
          returned buffer, ensuring that it does not exceed 80 bytes incl. NUL
        if changed, the new path will not become effective until the graphics
          screen is reinitialized
SeeAlso: AX=AC08h,AX=ACF0h
--------V-2FAC08DI1092-----------------------
INT 2F - QRIP/TSR - GET ICON DIRECTORY
        AX = AC08h
        DI = 1092h
Return: DX:BX -> 80-byte internal buffer containing ASCIZ icon directory name
Notes:  if DI <> 1092h on entry, QRIP chains the call
        the application may change the icon directory by overwriting the
          returned buffer, ensuring that it does not exceed 80 bytes incl. NUL,
          and includes a trailing backslash
        if changed, the new path becomes effective immediately
SeeAlso: AX=AC07h,AX=ACF0h
--------V-2FAC09DI1092-----------------------
INT 2F - QRIP/TSR - OUTPUT STRING THROUGH QRIP
        AX = AC09h
        DI = 1092h
        DX:BX -> string
        CX = length of string
Return: AX = character to send to BBS (0001h-00FFh) or special code (see #02967)
        BX = string-waiting flag
            0001h entire string waiting to be sent to terminal (call AX=AC0Ch)
        CX = DX = AX
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC04h,AX=AC06h,AX=AC0Ah,AX=ACF0h
--------V-2FAC0ADI1092-----------------------
INT 2F - QRIP/TSR - OUTPUT NULL-TERMINATED STRING THROUGH QRIP
        AX = AC0Ah
        DI = 1092h
        DX:BX -> ASCIZ string
Return: AX = character to send to BBS (0001h-00FFh) or special code (see #02967)
        BX = string-waiting flag
            0001h entire string waiting to be sent to terminal (call AX=AC0Ch)
        CX = DX = AX
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC05h,AX=AC06h,AX=AC09h,AX=ACF0h
--------V-2FAC0BDI1092-----------------------
INT 2F - QRIP/TSR - EXECUTE RIP "END SCENE" COMMAND
        AX = AC0Bh
        DI = 1092h
Return: nothing
Notes:  if DI <> 1092h on entry, QRIP chains the call
        enables all mouse buttons and cancels the RIP timeout
SeeAlso: AX=AC01h,AX=AC04h,AX=ACF0h
--------V-2FAC0CDI1092-----------------------
INT 2F - QRIP/TSR - GET STRING TO BE SENT TO BBS
        AX = AC0Ch
        DI = 1092h
Return: AX = status
            0000h nothing to be sent
            0001h a string is waiting to be sent
                DX:BX -> string to be sent (may contain NULs)
                CX = length of string
            0002h special code waiting (call AX=AC06h)
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC06h,AX=ACF0h
--------V-2FAC0DDI1092-----------------------
INT 2F - QRIP/TSR - SET PROTECTED SCREEN AREA
        AX = AC0Dh
        DI = 1092h
        CL = number of text lines at bottom of screen to protect (00h = off)
        BL = attribute with which to fill area (bit 7 = high-int. background)
Return: nothing
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC0Eh,AX=AC0Fh,AX=AC10h,AX=ACF0h
--------V-2FAC0EDI1092-----------------------
INT 2F - QRIP/TSR - WRITE ASCIZ STRING IN PROTECTED AREA
        AX = AC0Eh
        DI = 1092h
        DX:BX -> ASCIZ string to be written
        CL = column at which to begin writing
        CH = row number within protected area (00h = first line)
Return: nothing
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC0Dh,AX=AC0Fh,AX=AC10h,AX=ACF0h
--------V-2FAC0FDI1092-----------------------
INT 2F - QRIP/TSR - SCROLL PROTECTED AREA
        AX = AC0Fh
        DI = 1092h
        BH,BL = row,column of upper-left corner in protected area
        DH,DL = row,column of lower-right corner
        CL = number of lines to scroll up
Return: nothing
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC0Dh,AX=AC0Eh,AX=AC10h,AX=ACF0h
--------V-2FAC10DI1092-----------------------
INT 2F - QRIP/TSR - SET OUTPUT COLOR FOR PROTECTED AREA
        AX = AC10h
        DI = 1092h
        BL = new attribute (bit 7 set for high-intensity background)
Return: nothing
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC0Dh,AX=AC0Eh,AX=AC0Fh,AX=AC11h,AX=ACF0h
--------V-2FAC11DI1092-----------------------
INT 2F - QRIP/TSR - CONVERT PROTECTED AREA TO ENTIRE SCREEN
        AX = AC11h
        DI = 1092h
        BX = mode (0000h = normal protect, 0001h = allow full-screen access)
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC0Dh,AX=AC0Eh,AX=AC0Fh,AX=AC10h,AX=AC12h,AX=ACF0h
--------V-2FAC12DI1092-----------------------
INT 2F - QRIP/TSR - BEGIN POPUP-WINDOW MODE
        AX = AC12h
        DI = 1092h
Return: nothing
Notes:  if DI <> 1092h on entry, QRIP chains the call
        while popup-mode is in effect, the terminal program can write to the
          screen (and easily restore it) by outputting a RIP file with AX=AC04h
          or AX=AC05h
        QRIP will automatically drop out of popup-window mode if the terminal
          program invokes RIP pick-lists
        any changes to the protected area will be restored when popup-window
          mode is cancelled
SeeAlso: AX=AC04h,AX=AC11h,AX=AC13h,AX=ACF0h
--------V-2FAC13DI1092-----------------------
INT 2F - QRIP/TSR - END POPUP-WINDOW MODE
        AX = AC13h
        DI = 1092h
Return: nothing
Notes:  if DI <> 1092h on entry, QRIP chains the call
        restores screen
SeeAlso: AX=AC12h,AX=ACF0h
--------V-2FAC14DI1092-----------------------
INT 2F - QRIP/TSR - SAVE GRAPHICS SCREEN AND SWITCH TO TEXT MODE
        AX = AC14h
        DI = 1092h
Return: nothing
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC03h,AX=AC15h
--------V-2FAC15DI1092-----------------------
INT 2F - QRIP/TSR - RESTORE GRAPHICS SCREEN
        AX = AC15h
        DI = 1092h
Return: nothing
Desc:   restores the graphics screen saved by the last call to AX=AC14h
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC03h,AX=AC14h
--------V-2FAC16DI1092-----------------------
INT 2F - QRIP/TSR - REPORT MODE CHANGE TO QRIP
        AX = AC16h
        DI = 1092h
        BL = new mode
            00h terminate key wait
            01h status bar on
            02h status bar off
            03h VT-102 mode on
            04h VT-102 mode off
            05h doorway mode on
            06h doorway mode off
            07h hotkeys mode on
            08h hotkeys mode off
            09h tabkey mode on
            0Ah tabkey mode off
Return: nothing
Notes:  if DI <> 1092h on entry, QRIP chains the call
        all modes default to OFF when QRIP is first installed
--------V-2FAC17DI1092-----------------------
INT 2F - QRIP/TSR - CALL (EXECUTE) A RIP FILE
        AX = AC17h
        DI = 1092h
        DX:BX -> ASCIZ filename for RIP file to be executed
Return: nothing
Notes:  if DI <> 1092h on entry, QRIP chains the call
        the specified file may be in the current icon directory, the QRIP
          startup directory, or the current directory; any pathnames specified
          with the filename are ignored
--------V-2FAC18DI1092-----------------------
INT 2F - QRIP/TSR - SEND USER KEY TO QRIP
        AX = AC18h
        DI = 1092h
        BX = key (00xxh is normal ASCII, xx00h is an extended key)
Return: nothing
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC06h,AX=ACF0h
--------V-2FAC19DI1092-----------------------
INT 2F - QRIP/TSR - HANGUP
        AX = AC19h
        DI = 1092h
Return: nothing
Desc:   inform QRIP that carrier has been lost
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=ACF0h
--------V-2FAC1ADI1092-----------------------
INT 2F - QRIP/TSR - GET RIP_ENTER_BLOCK_MODE INFORMATION
        AX = AC1Ah
        DI = 1092h
Return: AH = requested protocol (see #02968)
        AL = file type (see #02969)
        DX:BX -> ASCIZ filename or 0000h:0000h
        CX = length of filename
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=ACF0h

(Table 02968)
Values for QRIP protocol identifier:
 00h    Xmodem (checksum)
 01h    Xmodem-CRC
 02h    Xmodem-1K
 03h    Xmodem-1K-G
 04h    Kermit
 05h    Ymodem
 06h    Ymodem-G
 07h    Zmodem with crash recovery
 08h-0Fh same as 00h-07h, but for uploading instead of downloading
SeeAlso: #02969

(Table 02969)
Values for QRIP file type:
 00h    RIP file sequence to be displayed
 01h    RIP file sequence to be stored in icon directory
 02h    ICN file sequence to be stored in icon directory
 03h    HLP file sequence to be stored, then auto-loaded if needed
 04h    COMPOSITE DYNAMIC file sequence (batch protocols only)
 05h    ACTIVE DYNAMIC file sequence (batch protocols only)
Note:   for file types 04h and 05h, any .RIP or .ICN files are stored in
          the icon directory; in mode 05h, any .RIP files are also played
          back as they are received
SeeAlso: #02968
--------V-2FAC1BDI1092-----------------------
INT 2F - QRIP/TSR - SET SYSTEM FONT SIZE
        AX = AC1Bh
        DI = 1092h
        BX = font size (see #02970)
Return: nothing
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC04h,AX=ACF0h

(Table 02970)
Values for QRIP font size specifier:
 00h    8x8 font, 80x43 screen
 01h    7x8 font, 90x43 screen
 02h    8x14 font, 80x25 screen
 03h    7x14 font, 90x25 screen
 04h    16x14 font, 40x25 screen
--------V-2FACF0DI1092-----------------------
INT 2F - QRIP/TSR - INSTALLATION CHECK
        AX = ACF0h
        DI = 1092h
Return: AX = 9142h if installed
            DX = DOS-takeover flag (nonzero if QRIP able to take over DOS)
            ---if DX nonzero---
            BX = QRIP version number in hex (BH = major, BL = minor)
            CX = current flags (see AX=AC01h)
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=AC00h/DI=1092h,AX=AC01h,AX=AC04h,AX=AC06h,AX=AC1Ah,AX=ACFFh
--------V-2FACFFDI1092-----------------------
INT 2F - QRIP/TSR - UNINSTALL
        AX = ACFFh
        DI = 1092h
Return: AX = status
            0000h unable to remove (interrupt vector hooked by another prog)
            0001h successful
            0002h unable to take over DOS at this time (retry uninstall)
Note:   if DI <> 1092h on entry, QRIP chains the call
SeeAlso: AX=ACF0h
--------!---Section--------------------------
Interrupt List, part 13 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------V-2FAD00-----------------------------
INT 2F U - DOS 3.3+ DISPLAY.SYS internal - INSTALLATION CHECK
        AX = AD00h
Return: AL = FFh if installed
            BX = ??? (0100h for MS-DOS 3.3+)
Note:   DOS 5+ DISPLAY.SYS chains to previous handler if AL is not one of the
          subfunctions listed here
SeeAlso: AX=AD01h"DISPLAY",AX=AD02h"DISPLAY"
--------O-2FAD00-----------------------------
INT 2F U - DR DOS 3.41-5.0, Novell DOS 7 KEYB - INSTALLATION CHECK
        AX = AD00h
Return: AX = FFFFh if installed
        flags destroyed
Note:   the Novell DOS 7 KEYB driver only checks AL to determine whether it
          is already installed
SeeAlso: AX=AD80h"Novell"
--------V-2FAD01-----------------------------
INT 2F U - DOS 3.3+ DISPLAY.SYS internal - SET ACTIVE CODE PAGE
        AX = AD01h
        BX = new code page (see #01757 at INT 21/AX=6602h)
Return: CF clear if successful
            AX = 0001h
        CF set on error (unsupported code page)
            AX = 0000h
SeeAlso: AX=AD02h"DISPLAY"
--------O-2FAD01-----------------------------
INT 2F U - DR DOS 3.41,5.0 KEYB - GET CONFIGURATION
        AX = AD01h
Return: BX = current code page (see #01757 at INT 21/AX=6602h)
        CX = current keyboard layout (0100h = US, 0102h = foreign)
        ES = resident code segment
SeeAlso: AX=AD01h"Novell",AX=AD00h"KEYB",AX=AD02h"KEYB",AX=AD83h"KEYB"
--------O-2FAD01-----------------------------
INT 2F U - Novell DOS 7 KEYB - GET/SET??? CONFIGURATION
        AX = AD01h
        CX = ??? (0000h)
Return: AX = FFFFh if Novell DOS 7 KEYB installed
        BX = current code page (see #01757 at INT 21/AX=6602h)
        CX = current keyboard layout (0100h = US, 0102h = foreign)
        ES = resident code segment
SeeAlso: AX=AD01h"DR DOS",AX=AD00h"KEYB",AX=AD02h"KEYB",AX=AD83h"KEYB"
--------V-2FAD02-----------------------------
INT 2F U - DOS 3.3+ DISPLAY.SYS internal - GET ACTIVE CODE PAGE
        AX = AD02h
Return: CF set if code page never set
            AX = 0001h
            BX = FFFFh (assume first hardware code page)
        CF clear if successful
            BX = current code page (see #01757 at INT 21/AX=6602h)
SeeAlso: AX=AD01h"DISPLAY",AX=AD03h
--------O-2FAD02-----------------------------
INT 2F U - Novell DOS 7 KEYB - ???
        AX = AD02h
        DX = ??? (0000h)
Return: AX = FFFFh if installed
        flags destroyed
SeeAlso: AX=AD01h"KEYB"
--------V-2FAD03-----------------------------
INT 2F U - DOS 3.3+ DISPLAY.SYS internal - GET CODE PAGE INFORMATION
        AX = AD03h
        ES:DI -> buffer for code page information (see #02971)
        CX = size of buffer in bytes
Return: CF set if buffer too small
        CF clear if successful
            ES:DI buffer filled
SeeAlso: AX=AD01h,AX=AD02h

Format of DOS 5.0-6.0 DISPLAY.SYS code page information:
Offset  Size    Description     (Table 02971)
 00h    WORD    number of software code pages
 02h    WORD    ??? (0003h)
 04h    WORD    number of hardware code pages
 06h  N WORDs   hardware code page numbers (see #01757 at INT 21/AX=6602h)
      N WORDs   software (prepared) code pages (FFFFh if not yet prepared)
--------V-2FAD04-----------------------------
INT 2F U - DOS 4.x only DISPLAY.SYS internal - ???
        AX = AD04h
        ???
Return: ???
--------V-2FAD10-----------------------------
INT 2F U - DOS 4.x DISPLAY.SYS internal - INSTALLATION CHECK???
        AX = AD10h
        ???
Return: AX = FFFFh
        BX = ??? (0100h in PC-DOS 4.01)
--------V-2FAD10-----------------------------
INT 2F U - DOS 5+ DISPLAY.SYS internal - ???
        AX = AD10h
        ???
Return: CF clear if successful
        CF set on error
Note:   this function is a NOP if the active code page has never been set
          (AX=AD02h returns BX=FFFFh); its purpose otherwise is not known
--------V-2FAD40-----------------------------
INT 2F - DOS 4.0+ - ???
        AX = AD40h
        DX = ???
        ???
Return: ???
Note:   called by PC-DOS 4.01 PRINT.COM
--------K-2FAD80-----------------------------
INT 2F u - MS-DOS 3.3+ KEYB.COM internal - INSTALLATION CHECK
        AX = AD80h
Return: AL = FFh if installed
            BX = version number (BH = major, BL = minor)
            ES:DI -> internal data (see #02972)
            AH destroyed (set to FFh by some implementations/versions)
Notes:  MS-DOS 3.30, PC-DOS 4.01, MS-DOS 5.00, and MS-DOS 6.22 all report
          version 1.00.
        this function was undocumented prior to the release of DOS 5.0
        most versions of KEYB completely replace the BIOS INT 09 handler, but
          Novell DOS's KEYB partially uses the BIOS code and thus continues
          to chain to the original INT 09 at times
        some utilities check for AX=FFFFh on return
SeeAlso: AX=AD80h"Novell",AX=AD81h,AX=AD82h,AX=AD83h

Format of KEYB internal data:
Offset  Size    Description     (Table 02972)
 00h    DWORD   original INT 09
 04h    DWORD   original INT 2F
 08h    DWORD   unused (0) original INT 16 in older KEYB versions???
 0Ch    WORD    flags A (see #02973)
 0Eh    WORD    flags B (see #02974)
 10h    BYTE    flags??? (bit1 used)
 11h    BYTE    ???
 12h  4 BYTEs   ???
 16h  2 BYTEs   country ID letters, default is "US"
 18h    WORD    current code page (see #01757 at INT 21/AX=6602h)
---DOS 3.3---
 1Ah    WORD    pointer to first item in list of code page tables???
 1Ch    WORD    pointer to ??? item in list of code page tables
 1Eh  2 BYTEs   unused???
 20h    WORD    pointer to key translation data (see #02976)
 22h    WORD    pointer to last item in code page table list (see #02975)
 24h  9 BYTEs   ???
---DOS 4.01---
 1Ah  2 BYTEs   ???
 1Ch    WORD    pointer to first item in list of code page tables???
 1Eh    WORD    pointer to ??? item in list of code page tables
 20h 2 BYTEs    unused???
 22h    WORD    pointer to key translation data (see #02976)
 24h    WORD    pointer to last item in code page table list (see #02975)
 26h  9 BYTEs   ???
---DOS 6.22--- (checked out with 6.22, but might be earlier)
 1Ah  2 BYTEs   ???
 1Ch    WORD    pointer to current (first???) item in list of code page tables
                (corresponding to codepage indicated at offset 18h)
                (initial value is FFFFh)
 1Eh    WORD    pointer to (entry to) list of code page tables (see #02975)
                If not FFFFh, INT 2F/AX=AD81h scans this list of code page
                  tables until the requested code page was found in list or
                  end of table was reached (FFFFh). If found, offsets 18h and
                  1Ch will be changed to requested new code page. If not found,
                  it returns with AX=0001h 'code page not supported').
 20h    WORD    unused??? (initial value: FFFFh)
 22h    WORD    pointer to key translation data (see #02455)
 24h    WORD    pointer to last item in code page table list (see #02454)
 26h    WORD    CAPSLock/ShiftLock management flags??? (0)
                Note:   It appears that none of the bits is ever set inside
                          KEYBs code!
                          The following is guesswork:
                bit15: =1: With country specific keyboard mapping (<Ctrl>+
                          <Alt>+<F2>) active, <CapsLock> works as CAPSLock
                          instead of ShiftLock??? Pressing a key in first row
                          resets CapsLock???
                          (Effective only on PC Convertible or with Enhanced
                          keyboard).
                bit14-10:  unused (0)
                bit 9: =1: With country specific keyboard mapping active:
                          some kind of temporary (table) shift???
                bit 8-0: unused (0)
 28h    BYTE    unused (0)
 29h    BYTE    make code xx for <Ctrl>+<Alt>+<xx> to set keyboard mapping
                  to US-layout (default is 3Bh=<F1>???)
                  (see INT 2F/AX=AD82h,INT 2F/AX=AD83h)
 2Ah    BYTE    make code yy for <Ctrl>+<Alt>+<yy> to set keyboard mapping
                  to country specific layout (default is 3Ch=<F2>???),
                  (see INT 2F/AX=AD82h,INT 2F/AX=AD83h)
 2Bh 16 BYTEs   unused (0) ???
Note:   at least in MS-DOS v6.22, the signature "SHARED DATA" immediately
          precedes this structure

Bitfields for MS-DOS v6.22 KEYB flags A:
Bit(s)  Description     (Table 02973)
 15     unused??? (0)
 14     set on machine with BIOS machine type FBh or FEh/FFh without enh kbd
 13     not FAh: ???
 12     set on start of machine detection, cleared on machine types F9h, FBh,
          FEh, FFh
 11     not FAh: ???
        (on ATs: override bit12 NOT to set NumLock on)
 10     set on machine type F9h
 9      unused??? (0)
 8      unused??? (0)
 7      used by INT 09, but never set!
        =1: after keyboard self test resulting AAh, INT 09 handler will (re)set
              keyboard code-set 1 and temporarily disable a PS/2 mouseport.
 6      used by INT09, but never set!
        =1: after keyboard self test resulting AAh, INT 09 handler will (re)set
              keyboard code-set 1 and temporarily disable a PS/2 mouseport.
 5      set for JP, KO, PR, TA layouts during installation???
        =1: some special codepage (>932???) management???
 4-0    unused??? (0)
SeeAlso: #02974,MEM F000h:FFFEh,INT 15/AH=C0h

Bitfields for MS-DOS v6.22 KEYB flags B:
Bit(s)  Description     (Table 02974)
 15     INT 16/AH=1xh supported (INT 16h/AH=92h call returns AH<=80h)
        if clear, extended keyboard scan codes are immediately discarded
 14     INT 16/AH=2xh supported (INT 16h/AH=A2h call returns AH<=80h)
 13     unused (0)
 12     network installed (INT 2F/AX=B800h)
 11     original IBM PC (BIOS date 1981)
 10     PC or PC/XT (BIOS machine type byte of FBh or FEh)
 9      PC Convertible (BIOS machine type byte of F9h); use INT 15/AX=4104h
 8      unused (0)
 7      IBM PS/2 model 30 (BIOS machine type byte of FAh)
 6      IBM AT (BIOS machine type FCh)
 5      IBM PS/2 (BIOS machine type F8h)
 4      PS/2 and unknown only: non-standard 8042 reported by INT 15/AH=C0h
        =1: after keyboard self test resulting AAh, INT 09 handler will (re)set
              keyboard code-set 1 and temporarily disable a PS/2 mouseport.
 3      temporary flag???
 2-0    ???
SeeAlso: #02972,#02973

Format of code page table list entries:
Offset  Size    Description     (Table 02975)
 00h    WORD    pointer to next item, FFFFh = last
 02h    WORD    code page (see #01757 at INT 21/AX=6602h)
 04h  2 BYTEs   ???

Format of KEYB translation data:
Offset  Size    Description     (Table 02976)
 00h    WORD    size of data in bytes, including this word
 02h N-2 BYTEs  ???
--------K-2FAD80-----------------------------
INT 2F u - Novell DOS 7 KEYB.COM - INSTALLATION CHECK
        AX = AD80h
Return: AX = FFFFh if installed
            CX = Novell DOS KEYB version number (CL = major, CH = minor)
            DX = current keyboard codepage
            ES:DI -> internal data and tables (ES=FFFEh if KEYB in HMA)
        flags destroyed
Notes:  versions: v2.08 (original ship 4/94), v2.09 (Update 10, 11/18/94),
          v2.10 (Update 12, 2/22/95), v2.11 (Update 13, 5/8/95),
          v2.12 (Update 14, 7/31/95)
        although the installation check is via this INT 2F call, Novell DOS 7's
          KEYB has no known INT 2F entry point!  Presumably, the handler is
          either coded in the kernel or reached via a FAR JMP from the kernel
SeeAlso: AX=AD80h"MS-DOS"
--------K-2FAD81-----------------------------
INT 2F - DOS 3.3+ KEYB.COM - SET KEYBOARD CODE PAGE
        AX = AD81h
        BX = code page (see #01757 at INT 21/AX=6601h)
Return: CF set on error
            AX = 0001h (code page not available)
        CF clear if successful
Notes:  called by DISPLAY.SYS
        this function was undocumented prior to the release of DOS 5.0
SeeAlso: AX=AD80h,AX=AD82h
--------K-2FAD82-----------------------------
INT 2F - DOS 3.3+ KEYB.COM - SET KEYBOARD MAPPING
        AX = AD82h
        BL = new state
            00h US keyboard (Control-Alt-F1)
            FFh foreign keyboard (Control-Alt-F2)
Return: CF set on error (BL not 00h or FFh)
        CF clear if successful
Note:   this function was undocumented prior to the release of DOS 5.0
SeeAlso: AX=AD80h,AX=AD81h,AX=AD83h
--------K-2FAD83-----------------------------
INT 2F - DOS 5+ KEYB.COM - GET KEYBOARD MAPPING
        AX = AD83h
Return: BL = current state
            00h US keyboard
            FFh foreign keyboard
SeeAlso: AX=AD82h
--------l-2FAE00-----------------------------
INT 2F U - DOS 3.3+ internal - INSTALLABLE COMMAND - INSTALLATION CHECK
        AX = AE00h
        DX = magic value FFFFh
        CH = FFh
        CL = length of command line tail (4DOS v4.0)
        DS:BX -> command line buffer (see #02977)
        DS:SI -> command name buffer (see #02978)
        DI = 0000h (4DOS v4.0)
Return: AL = FFh if this command is a TSR extension to COMMAND.COM
        AL = 00h if the command should be executed as usual
Notes:  This call provides a mechanism for TSRs to install permanent
          extensions to the command repertoire of COMMAND.COM.  It appears
          that COMMAND.COM makes this call before executing the current
          command line, and does not execute it itself if the return is FFh.
        APPEND hooks this call, to allow subsequent APPEND commands to
          execute without re-running APPEND
SeeAlso: AX=AE01h

Format of COMMAND.COM command line buffer:
Offset  Size    Description     (Table 02977)
 00h    BYTE    max length of command line, as in INT 21/AH=0Ah
 01h    BYTE    count of bytes to follow, excluding terminating 0Dh
      N BYTEs   command line text, terminated by 0Dh

Format of command name buffer:
Offset  Size    Description     (Table 02978)
 00h    BYTE    length of command name
 01h  N BYTEs   uppercased command name (blank-padded to 11 chars by 4DOS v4)
--------l-2FAE01-----------------------------
INT 2F U - DOS 3.3+ internal - INSTALLABLE COMMAND - EXECUTE
        AX = AE01h
        DX = magic value FFFFh
        CH = 00h
        CL = length of command name (4DOS v4.0)
        DS:BX -> command line buffer (see #02977)
        DS:SI -> command name buffer (see #02978)
Return: DS:SI buffer updated
          if length byte is nonzero, the following bytes contain the uppercase
          internal command to execute and the command line buffer contains the
          command's parameters (the first DS:[SI] bytes are ignored)
Notes:  this call requests execution of the command which a previous call to
          AX=AE00h indicated was resident
        APPEND hooks this call
BUG:    Novell DOS 7.0's COMMAND.COM (prior to Update 12) will attempt to run
          a disk program with the indicated name even if the returned length
          byte is zero, because the register used to flag this case is
          clobbered without first checking it.  The workaround is to set the
          command name buffer to "REM" followed by enough blanks to pad out
          the original command's length, which will also work with MS-DOS 6.
          (from padgett@tccslr.dnet.mmc.com)
SeeAlso: AX=AE00h
--------O-2FAF00-----------------------------
INT 2F - WinDOS v2.11 - INSTALLATION CHECK
        AX = AF00h
Return: AL = FFh if installed
Program: WinDOS is a DOS clone (claimed to be mostly MS-DOS 5.0 API compatible)
          written by Heiko Goemann
SeeAlso: AX=AF01h"WinDOS",INT 21/AH=30h
----------2FAF00-----------------------------
INT 2F U - ???
        AX = AF00h
        ???
Return: AX = 0000h if interface supported
SeeAlso: AX=AF02h,AX=AF03h,AX=AF04h,AX=AF13h,AX=AF30h
--------O-2FAF01-----------------------------
INT 2F - WinDOS v2.11 - TURN ON ONLINE MODE
        AX = AF01h
Return: nothing
Desc:   indicate that the user will not exchange floppy disks, allowing WinDOS
          to cache disk sectors in memory and avoid writing modified sectors
          back out to the floppy disk
SeeAlso: AX=AF00h"WinDOS",AX=AF02h"WinDOS"
--------O-2FAF02-----------------------------
INT 2F - WinDOS v2.11 - TURN OFF ONLINE MODE
        AX = AF02h
Return: nothing
Desc:   indicate that the floppy disk may be removed, and that WinDOS should
          write all buffered sectors out to the floppy disk
SeeAlso: AX=AF00h"WinDOS",AX=AF01h"WinDOS"
----------2FAF02-----------------------------
INT 2F U - ???
        AX = AF02h
        ???
Return: ES = ???
SeeAlso: AX=AF00h
--------O-2FAF03-----------------------------
INT 2F - WinDOS v2.11 - TURN VIDMEM ON
        AX = AF03h
Return: AX = status
            0000h successful
            0001h CPU not in mode set by DOS386=On
            0002h video adapter in graphics mode
            0003h memory chain corrupted
SeeAlso: AX=AF00h"WinDOS",AX=AF04h"WinDOS",AX=AF05h"WinDOS"
----------2FAF03-----------------------------
INT 2F U - ???
        AX = AF03h
        ???
Return: DX = ???
SeeAlso: AX=AF00h
--------O-2FAF04-----------------------------
INT 2F - WinDOS v2.11 - TURN VIDMEM OFF
        AX = AF04h
Return: AX = status
            0000h successful
            0001h video memory is in use
SeeAlso: AX=AF00h"WinDOS",AX=AF03h"WinDOS",AX=AF05h"WinDOS"
----------2FAF04-----------------------------
INT 2F U - ???
        AX = AF04h
        ???
Return: ???
SeeAlso: AX=AF00h
--------O-2FAF05-----------------------------
INT 2F - WinDOS v2.11 - GET VIDMEM STATE
        AX = AF05h
Return: AX = status (0000h off, 0001h on)
SeeAlso: AX=AF00h"WinDOS",AX=AF03h"WinDOS",AX=AF04h"WinDOS"
----------2FAF05-----------------------------
INT 2F U - ???
        AX = AF05h
        ???
Return: ???
SeeAlso: AX=AF00h
--------O-2FAF06-----------------------------
INT 2F - WinDOS v2.11 - MAKE PROGRAM UNBREAKABLE
        AX = AF06h
        DS:DX -> break handler
        DI:BX = stack to use for break handler
Return: nothing
Desc:   set a handler which should be invoked when Ctrl-C is pressed instead of
          aborting the program
SeeAlso: AX=AF00h"WinDOS",AX=AF0Ah"WinDOS",AX=AF0Ch"WinDOS"
--------O-2FAF07-----------------------------
INT 2F - WinDOS v2.11 - SIGNAL FATAL OVERLAY FAULT
        AX = AF07h
Return: never -- system reset
Desc:   pop up a window indicating that the system overlay file can not be
          loaded
SeeAlso: AX=AF00h"WinDOS",AX=AF08h"WinDOS"
--------O-2FAF08-----------------------------
INT 2F - WinDOS v2.11 - SIGNAL RECOVERABLE OVERLAY FAULT
        AX = AF08h
Return: nothing
Desc:   pop up a window requesting that a disk containing SH.OVL be inserted
SeeAlso: AX=AF00h"WinDOS",AX=AF07h"WinDOS",AX=AF0Bh
--------O-2FAF09-----------------------------
INT 2F - WinDOS v2.11 - GET TERMINATED PSP
        AX = AF09h
Return: DS = PSP segment of most recently ended TSR
SeeAlso: AX=AF00h"WinDOS",AX=AF0Ah
--------O-2FAF0A-----------------------------
INT 2F - WinDOS v2.11 - GET MAIN SHELL PSP
        AX = AF0Ah
Return: AX = shell's PSP (same as DS on last call to AX=AF06h)
Desc:   get the PSP address of the last program to call AX=AF06h (normally
          the main command interpreter)
SeeAlso: AX=AF00h"WinDOS",AX=AF06h"WinDOS",AX=AF09h
--------O-2FAF0B-----------------------------
INT 2F - WinDOS v2.11 - SIGNAL FATAL ERROR
        AX = AF0Bh
Return: never -- system reset
Desc:   pop up a window indicating a terminal system error
SeeAlso: AX=AF00h"WinDOS",AX=AF07h,AX=AF08h,AX=AF15h"WinDOS"
--------O-2FAF0C-----------------------------
INT 2F - WinDOS v2.11 - GET OTHER MAIN SHELL PARAMETERS
        AX = AF0Ch
Return: DI:AX = stack
        SI = offset of break handler
Desc:   retrieve the parameters last set by AX=AF06h (normally by the main
          command interpreter)
SeeAlso: AX=AF00h"WinDOS",AX=AF06h"WinDOS"
--------O-2FAF0D-----------------------------
INT 2F - WinDOS v2.11 - GET CURRENT PARAMETER
        AX = AF0Dh
        BX = offset of desired parameter in global data area
Return: AX = current value of parameter (AH undefined if byte value)
SeeAlso: AX=AF00h"WinDOS",AX=AF0Eh
--------O-2FAF0E-----------------------------
INT 2F - WinDOS v2.11 - SET CURRENT PARAMETER BYTE VALUE
        AX = AF0Eh
        BX = offset of desired parameter in global data area
        DL = new value of parameter
Return: nothing
SeeAlso: AX=AF00h"WinDOS",AX=AF0Dh
--------O-2FAF0F-----------------------------
INT 2F - WinDOS v2.11 - GET HISTORY SEGMENT
        AX = AF0Fh
Return: AX = segment of buffer for input history, or 0000h if none
SeeAlso: AX=AF00h"WinDOS",AX=AF10h"WinDOS"
--------O-2FAF10-----------------------------
INT 2F - WinDOS v2.11 - SET HISTORY SEGMENT
        AX = AF10h
        BX = segment of new buffer for input history
Return: nothing
Note:   the buffer must have been allocated with INT 21/AH=48h
SeeAlso: AX=AF00h"WinDOS",AX=AF0Fh"WinDOS"
--------O-2FAF11-----------------------------
INT 2F - WinDOS v2.11 - FREE XMS BLOCKS
        AX = AF11h
Return: nothing
Desc:   free all XMS blocks whose XMS identification value (see AX=AF12h)
          equals the current PSP
SeeAlso: AX=AF00h"WinDOS",AX=AF12h"WinDOS",INT 21/AH=50h
--------O-2FAF12-----------------------------
INT 2F - WinDOS v2.11 - SET XMS IDENTIFICATION VALUE
        AX = AF12h
        DS = new XMS identification value (normally caller's PSP segment)
Return: nothing
SeeAlso: AX=AF00h"WinDOS",AX=AF11h"WinDOS"
----------2FAF12-----------------------------
INT 2F U - ???
        AX = AF12h
        ???
Return: ES = ???
SeeAlso: AX=AF00h
--------O-2FAF13-----------------------------
INT 2F - WinDOS v2.11 - SET ASSIGN VALUE
        AX = AF13h
        BL = number of drive to remap (00h = A:)
        DL = number of drive to be accessed via drive number BL
Return: nothing
Desc:   remap a drive letter
Note:   the remapping can be canceled by specifying DL=BL
SeeAlso: AX=AF00h"WinDOS",AX=AF14h"WinDOS",AX=0601h
----------2FAF13-----------------------------
INT 2F U - ???
        AX = AF13h
        ???
Return: ???
SeeAlso: AX=AF00h
--------O-2FAF14-----------------------------
INT 2F - WinDOS v2.11 - GET ASSIGN VALUE
        AX = AF14h
        BL = drive number (00h = A:)
Return: DL = drive number which is actually accessed by drive number BL
Desc:   determine the current mapping for a drive
SeeAlso: AX=AF00h"WinDOS",AX=AF13h"WinDOS",AX=0601h
--------O-2FAF15-----------------------------
INT 2F - WinDOS v2.11 - SIGNAL STACK ERROR
        AX = AF15h
Return: never -- system reset
Desc:   pop up a window indicating a stack overflow
SeeAlso: AX=AF00h"WinDOS",AX=AF0Bh"WinDOS"
--------O-2FAF16-----------------------------
INT 2F - WinDOS v2.11 - GET SIMPLE TRUENAME
        AX = AF16h
        DS:SI -> path to be canonicalized
        ES:DI -> buffer for canonicalized filename/pathname
Return: CF clear if successful
            AX = 0000h
        CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
Desc:   partially canonicalize a path, omitting SUBST, JOIN, ASSIGN, and
          network redirections
SeeAlso: AX=AF00h"WinDOS",INT 21/AH=60h
--------O-2FAF17-----------------------------
INT 2F - WinDOS v2.11 - QUERY FOR NEW CURRENT DRIVE
        AX = AF17h
Return: nothing
Desc:   pop up a dialog allowing the user to select a new default drive
SeeAlso: AX=AF00h"WinDOS"
--------O-2FAF18-----------------------------
INT 2F - WinDOS v2.11 - SET CTRL-C/CTRL-BREAK DISABLE FLAG
        AX = AF18h
        DL = new break-checking state (00h enabled, 01h disabled)
Return: nothing
SeeAlso: AX=AF00h"WinDOS"
--------O-2FAF19-----------------------------
INT 2F - WinDOS v2.11 - SET HEAD SETTLE FLAG
        AX = AF19h
        DL = new state
            00h diskette head settling time reset to 15ms before each access
            01h no additional head settling time used between accesses
Return: nothing
SeeAlso: AX=AF00h"WinDOS"
--------O-2FAF1A-----------------------------
INT 2F - WinDOS v2.11 - SEARCH FOR NON-FRAGMENTED DISK AREA
        AX = AF1Ah
        BL = drive (00h = current, 01h = A:, etc.)
        CX = number of clusters desired
Return: CF clear if successful
            DI = first free cluster on logical drive
            BP = first cluster of contiguous free area
            AX destroyed
        CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
Desc:   attempt to find an area of the disk containing the specified number
          of contiguous unallocated clusters
SeeAlso: AX=AF00h"WinDOS"
----------2FAF30-----------------------------
INT 2F U - ???
        AX = AF30h
        ???
Return: ???
SeeAlso: AX=AF00h
--------d-2FAFDE-----------------------------
INT 2F - Disk-Emu - INSTALLATION CHECK / GET VERSION
        AX = AFDEh
        ES:DI -> 14-byte buffer for data (see #02979)
Return: AX = CFDEh (Carlos Fernandez Disk-Emu) if installed
            BX = version (BH = major, BL = minor)

Format of Disk-Emu information data:
Offset  Size    Description     (Table 02979)
 00h    BYTE    number of tracks
 01h    BYTE    sectors per track
 02h    WORD    bytes per sector
 04h    BYTE    number of heads
 05h    BYTE    flag: 00h inactive, 01h active
 06h    BYTE    write protection (00h none, 01h full, 02h pseudo)
 07h    BYTE    saved (00h some unsaved data, 01h all data saved)
 08h    BYTE    disk in memory (00h no, 01h yes)
 09h    WORD    EMS handle
 0Bh    WORD    XMS handle
 0Dh    BYTE    memory type used for disk (00h XMS, 01h EMS)
--------V-2FB000-----------------------------
INT 2F - DOS 3.3+ GRAFTABL.COM - INSTALLATION CHECK
        AX = B000h
Return: AL = status
            00h not installed, OK to install
            01h not installed, not OK to install
            FFh installed
Notes:  called by DISPLAY.SYS
        documented for DOS 5.0, but undocumented in prior versions
SeeAlso: AX=2300h,AX=2E00h,AX=B001h
--------V-2FB001-----------------------------
INT 2F - DOS 3.3+ GRAFTABL.COM - GET GRAPHICS FONT TABLE
        AX = B001h
        DS:BX -> DWORD buffer for address of 8x8 font table
Return: buffer filled
        AL = FFh
Note:   PC-DOS 3.30/4.01 and MS-DOS 6.0 set the font table offset to 0130h,
          MS-DOS 3.30 sets it to 0030h
SeeAlso: AH=2Eh"GRAFTABL",AX=B000h
--------I-2FB400-----------------------------
INT 2F - IBM PC3270 EMULATION PROG v3 - INSTALLATION CHECK
        AX = B400h
Return: AL = FFh if installed
--------I-2FB401-----------------------------
INT 2F - IBM PC3270 EMULATION PROG v3 - GET HOST BUFFER ADDRESS
        AX = B401h
Return: ES -> host screen buffer (PC ASCII format)
        ES unchanged if communications not started
--------I-2FB402-----------------------------
INT 2F - IBM PC3270 EMULATION PROG v3 - ???
        AX = B402h
        BX = ???
Return: ???
--------I-2FB403-----------------------------
INT 2F - IBM PC3270 EMULATION PROG v3 - ???
        AX = B403h
        ???
Return: ???
--------I-2FB404-----------------------------
INT 2F - IBM PC3270 EMULATION PROG v3 - ???
        AX = B404h
        ???
Return: ???
--------I-2FB405-----------------------------
INT 2F - IBM PC3270 EMULATION PROG v3 - ???
        AX = B405h
        ???
Return: ???
--------f-2FB700-----------------------------
INT 2F - APPEND - INSTALLATION CHECK
        AX = B700h
Return: AL = status
            00h not installed
            FFh installed
Note:   MS-DOS 3.30 APPEND refuses to install itself when run inside TopView or
          a TopView-compatible environment
SeeAlso: AX=B702h
--------f-2FB701-----------------------------
INT 2F U - APPEND v3.21 only - GET APPEND PATH
        AX = B701h
Return: ES:DI -> active APPEND path
Notes:  the only version of APPEND known to support this call is the APPEND
          shipped with Microtek MS-DOS 3.21; MS-DOS 3.30-6.00 APPEND displays
          "Incorrect APPEND Version" and aborts the caller
        use AX=B704h first, and only call this function if that one is not
          supported
SeeAlso: AX=B700h,AX=B704h
--------f-2FB702-----------------------------
INT 2F - APPEND - GET VERSION
        AX = B702h
Return: AX = FFFFh if not DOS 4.0 APPEND (also if DOS 5.0 APPEND)
        AL = major version number
        AH = minor version number, otherwise
SeeAlso: AX=B700h,AX=B710h
--------f-2FB703-----------------------------
INT 2F U - DOS 3.3, DOS 5.0 APPEND - HOOK INT 21
        AX = B703h
        ES:DI -> INT 21 handler APPEND should chain to
Return: ES:DI -> APPEND's INT 21 handler
Note:   each invocation of this function toggles a flag which APPEND uses to
          determine whether to chain to the user handler or the original
          INT 21
SeeAlso: AX=B700h,AX=B706h
--------f-2FB704-----------------------------
INT 2F - DOS 3.3+ APPEND - GET APPEND PATH
        AX = B704h
Return: ES:DI -> active APPEND path (128 bytes max)
Note:   some versions of append do not support this call, and return ES
          unchanged; in this case, you should call AX=B701h to get the APPEND
          path
SeeAlso: AX=B701h
--------f-2FB706-----------------------------
INT 2F - DOS 4.0+ APPEND - GET APPEND FUNCTION STATE
        AX = B706h
Return: BX = APPEND state (see #02980)
SeeAlso: AX=B700h,AX=B707h

Bitfields for APPEND state:
Bit(s)  Description     (Table 02980)
 0      set if APPEND enabled
 1-11   reserved
 12     (DOS 5.0) set if APPEND applies directory search even if a drive has
          been specified
 13     set if /PATH flag active
 14     set if /E flag active (environment var APPEND exists)
 15     set if /X flag active
--------f-2FB707-----------------------------
INT 2F - DOS 4.0+ APPEND - SET APPEND FUNCTION STATE
        AX = B707h
        BX = APPEND state bits (see #02980)
SeeAlso: AX=B700h,AX=B706h
--------f-2FB710-----------------------------
INT 2F U - DOS 3.3+ APPEND - GET VERSION INFO
        AX = B710h
Return: AX = current APPEND state (see #02980)
        BX = ??? (0000h in MS-DOS 3.30 and 5.00)
        CX = ??? (0000h in MS-DOS 3.30 and 5.00)
        DL = major version
        DH = minor version
SeeAlso: AX=B700h,AX=B702h
--------f-2FB711-----------------------------
INT 2F - DOS 4.0+ APPEND - SET RETURN FOUND NAME STATE
        AX = B711h
Note:   if the next INT 21h call (and ONLY the next) is function 3Dh, 43h, or
          6Ch (also 4B03h and 4Eh if /X active), the fully qualified filename
          is written over top of the filename passed to the INT 21h call.  The
          application must provide a sufficiently large buffer.  This state is
          reset after the next INT 21h call processed by APPEND.
        APPEND uses the byte at offset 3Dh in the PSP
          (see #01378 at INT 21/AH=26h) to store the flag telling it to
          overwrite the filename
BUG:    DOS 4.0 APPEND reportedly overwrites DS:DX instead of DS:SI for
          INT 21/AH=6Ch
SeeAlso: INT 21/AH=26h,INT 21/AH=4Eh
--------N-2FB800-----------------------------
INT 2F - NETWORK - INSTALLATION CHECK
        AX = B800h
Return: AL = status
            00h     not installed
            nonzero installed
              BX = installed component flags (test in this order!)
                   bit 6   server
                   bit 2   messenger
                   bit 7   receiver
                   bit 3   redirector
                   bit 1   LANPUP (LANtastic 4.0)
Notes:  this function is supported by PC LAN Program, LAN Manager, LANtastic,
          NetWare Lite, SilverNET, 10NET, etc.
        LANtastic and NetWare Lite use only BL for the return value, preserving
          BH; LAN Manager and DOS LAN Requester return BH=00h.  This permits
          differentiation between those two groups by setting BH to a nonzero
          value before the call and checking its value on return.
SeeAlso: AX=4E53h,AX=B809h
--------N-2FB800CXF041-----------------------
INT 2F - 10NET - INSTALLATION CHECK
        AX = B800h
        CX = F041h
Return: AL = status
            00h     not installed
            nonzero installed
                BX = installed component flags (test in this order!)
                   bit 6   server
                   bit 2   messenger
                   bit 7   receiver
                   bit 3   redirector
                   bit 1   LANPUP (LANtastic 4.0)
                CX = 10Net data segment
                CX:DX -> 10Net Configuration Table
                          (see #01691 at INT 21/AX=5E01h"10NET")
Note:   if CX <> F041h on entry, neither CX nor DX will be changed, and this
          call becomes identical to the standard installation check above
SeeAlso: AX=B800h"network",INT 21/AX=5E01h"10NET"
--------N-2FB803-----------------------------
INT 2F - NETWORK - GET NETWORK EVENT POST HANDLER
        AX = B803h
Return: ES:BX -> current event post handler (see AX=B804h)
Note:   this function is supported by PC LAN Program, 10NET v5.0,
          NetSoft DOS-NET v1.20+
SeeAlso: AX=B800h,AX=B804h,AX=B903h
--------N-2FB804-----------------------------
INT 2F - NETWORK - SET NETWORK EVENT POST HANDLER
        AX = B804h
        CX = (10NET) 0370h if 10Windows is hooking post handler
        ES:BX -> new event post handler (see #02981)
Notes:  used in conjunction with AX=B803h to hook into the network event post
          routine
        this function is supported by PC LAN Program, 10NET v5.0,
          NetSoft DOS-NET v1.20+
        The specified handler is called on any network event.  Two events are
          defined: message received and critical network error.
SeeAlso: AX=B800h,AX=B803h,AX=B904h

(Table 02981)
Values network post routine is called with:
        AX = 0000h single block message
            DS:SI -> ASCIZ originator name
            DS:DI -> ASCIZ destination name
            ES:BX -> text header (see #02982)
        AX = 0001h start multiple message block
            CX = block group ID
            DS:SI -> ASCIZ originator name
            DS:DI -> ASCIZ destination name
        AX = 0002h multiple block text
            CX = block group ID
            ES:BX -> text header (see #02982)
        AX = 0003h end multiple block message
            CX = block group ID
        AX = 0004h message aborted due to error
            CX = block group ID
        AX = 0101h server received badly formatted network request
            Return: AX = FFFFh (PC LAN will process error)
        AX = 0102h unexpected network error
            ES:BX -> NCB (see #03249 at INT 5C"NetBIOS")
        AX = 0103h server received INT 24 error
            other registers as for INT 24, except AH is in BH
            Return: as below, but only 0000h and FFFFh allowed
Return: AX = response code
            0000h user post routine processed message
            0001h PC LAN will process message, but message window not displayed
            FFFFh PC LAN will process message

Format of text header:
Offset  Size    Description     (Table 02982)
 00h    WORD    length of text (maximum 512 bytes)
 02h  N BYTEs   text of message
Note:   all CRLF sequences in message text are replaced by 14h; all other
          values below 20h (space) are reserved
--------N-2FB807-----------------------------
INT 2F - NETWORK - GET NetBIOS NAME NUMBER OF MACHINE NAME
        AX = B807h
Return: CH = NetBIOS name number of the machine name
SeeAlso: INT 21/AX=5E00h
--------N-2FB808-----------------------------
INT 2F U - NETWORK - RELINK KEYBOARD HANDLER
        AX = B808h
        ES:BX -> INT 09 handler network should call after it finishes INT 09
Notes:  this call replaces the address to which the network software chains on
          an INT 09 without preserving the original value.  This allows a prior
          handler to unlink, but does not allow a new handler to be added
          such that the network gets the INT 09 first unless the new handler
          completely takes over INT 09 and never chains.
        this function is called by the DOS 3.2 KEYBxx.COM
SeeAlso: AX=B908h
--------N-2FB809-----------------------------
INT 2F - NETWORK - LANtastic, NetWare Lite - GET VERSION
        AX = B809h
Return: AH = major version
        AL = minor version (decimal)
Notes:  this function is supported in this form by LANtastic, NetWare Lite,
          SilverNET, ...
        NetWare Lite returns its own version number rather than a PC LAN
          compatibility version
SeeAlso: AX=4E53h,AX=B800h,AX=B809h"PC LAN Program"
--------N-2FB809-----------------------------
INT 2F - NETWORK - PC LAN Program, Microsoft Networking - GET VERSION
        AX = B809h
Return: AH = minor version (decimal)
        AL = major version
Notes:  this function is supported in this form by PC LAN Program, LAN Manager,
          the DOS LAN Requester, 10NET v5.0, and Microsoft Networking under
          WfWg 3.11
        10NET returns version 1.10 (AX=0A01h) for compatibility
SeeAlso: AX=4E53h,AX=B800h,AX=B809h"LANtastic"
--------N-2FB80A-----------------------------
INT 2F u - PC Network 1.00 - ???
        AX = B80Ah
        ???
Return: ???
Program: PC Network is an early networking package which was renamed the
          IBM PC Local Area Network Program (PC LAN Program) as of v1.10
Note:   called by RECEIVER (equivalent to NetWare Lite SERVER)
--------N-2FB80E-----------------------------
INT 2F U - DOS LAN Requester - GET XSI2 ADDRESS / DATA
        AX = B80Eh
Return: DS:DI -> XSI2 TSR's resident data (see #02983)
Note:   this function is used by NET.COM to locate the USERID and DOMAIN of
          the logged-in user (which may differ from the NET START domain
          name from DOSLAN.INI which is returned by AX=B80Fh)
SeeAlso: AX=B800h,AX=B80Fh

Format of XSI2 resident data:
Offset  Size    Description     (Table 02983)
 00h 254 BYTEs  ???
 FEh 10 BYTEs   user ID 1
108h 10 BYTEs   user ID 2
112h 10 BYTEs   domain name 1
11Ch 10 BYTEs   domain name 2
126h  ? BYTEs   domain controller
--------N-2FB80F-----------------------------
INT 2F - DOS LAN Requester - GET START PARAMETERS
        AX = B80Fh
        CX = size of return data buffer
        ES:DI -> return data buffer (see #02984)
Return: AX = status
             00h     network started
             nonzero network not started
        CX = number of bytes returned in buffer
        ES:DI buffer filled
SeeAlso: AX=B809h"PC LAN Program",AX=B80Eh

Format of DOS LAN Requester return data buffer:
Offset  Size    Description     (Table 02984)
 00h    BYTE    major version
 01h    BYTE    minor version
 02h    WORD    configuration flags given when network was started (see #02985)
 04h 15 BYTEs   NET START machine name (space padded)
 13h    BYTE    00h
 14h 9  BYTEs   NET START domain name (NULL padded)
 1Dh    BYTE    00h
 1Eh 32 BYTEs   /WRK heuristics string (space padded, not terminated)
 3Eh    WORD    /SRV value
 40h    WORD    /ASG value
 42h    WORD    /NBC value
 44h    WORD    /NBS value
 46h    WORD    /BBC value
 48h    WORD    /BBS value
 4Ah    WORD    /PBC value
 4Ch    WORD    /PBS value
 4Eh    WORD    /PFS value
 50h    WORD    /PFT value
 52h    WORD    /PWT value
 54h    WORD    /KUC value
 56h    WORD    /KST value
 58h    WORD    /NVS value
 5Ah    WORD    /NMS value
 5Ch    WORD    /NDB value
 5Eh    WORD    /MBI value
 60h    BYTE    NetBIOS name number for machine name
 61h    BYTE    NetBIOS name number for domain name
 62h    WORD    NetBIOS sessions required for configuration
 64h    WORD    NetBIOS commands required for configuration
 66h    WORD    NetBIOS names required for configuration
 68h 128 BYTEs  NET START path (LANROOT)
 E8h    BYTE    00h

Bitfields for configuration flags:
Bit(s)  Description     (Table 02985)
 0      /NVS nonzero
 1      /NMS nonzero
 2      /API
 3      /HIM
 4      /LIM
 5      /ENC
 6      /POP
 7      /EMS
 8      /RPL
 9-12   reserved
 13     RDR started
 14     RCV started
 15     User is currently logged on
--------N-2FB900-----------------------------
INT 2F - PC Network RECEIVER.COM - INSTALLATION CHECK
        AX = B900h
Return: AL = state
            00h if not installed
            FFh if installed
--------N-2FB901-----------------------------
INT 2F - PC Network RECEIVER.COM - GET RECEIVER.COM INT 2F HANDLER ADDRESS
        AX = B901h
Return: AL = ???
        ES:BX -> RECEIVER.COM INT 2F handler
Desc:   allows more efficient execution by letting the caller bypass any other
          INT 2F handlers which have been added since RECEIVER.COM was
          installed
--------N-2FB903-----------------------------
INT 2F - PC Network RECEIVER.COM - GET RECEIVER.COM POST ADDRESS
        AX = B903h
Return: ES:BX -> POST handler
SeeAlso: AX=B803h,AX=B904h
--------N-2FB904-----------------------------
INT 2F - PC Network RECEIVER.COM - SET RECEIVER.COM POST ADDRESS
        AX = B904h
        ES:BX -> new POST handler
SeeAlso: AX=B804h,AX=B903h
--------N-2FB905-----------------------------
INT 2F - PC Network RECEIVER.COM - GET FILENAME
        AX = B905h
        DS:BX -> 128-byte buffer for filename 1
        DS:DX -> 128-byte buffer for filename 2
Return: buffers filled from RECEIVER.COM internal buffers
Note:   use of filenames is unknown, but one appears to be for storing messages
SeeAlso: AX=B906h
--------N-2FB906-----------------------------
INT 2F - PC Network RECEIVER.COM - SET FILENAME
        AX = B906h
        DS:BX -> 128-byte buffer for filename 1
        DS:DX -> 128-byte buffer for filename 2
Return: RECEIVER.COM internal buffers filled from user buffers
Note:   use of filenames is unknown, but one appears to be for storing messages
SeeAlso: AX=B905h
--------N-2FB908-----------------------------
INT 2F - PC Network RECEIVER.COM - UNLINK KEYBOARD HANDLER
        AX = B908h
        ES:BX -> INT 09 handler RECEIVER should call after it finishes INT 09
Note:   this call replaces the address to which RECEIVER.COM chains on an
          INT 09 without preserving the original value.  This allows a prior
          handler to unlink, but does not allow a new handler to be added
          such that RECEIVER gets the INT 09 first.
SeeAlso: AX=B808h
--------V-2FBC00-----------------------------
INT 2F - Windows 3.0, DOS 5+ EGA.SYS - INSTALLATION CHECK
        AX = BC00h
Return: AL = state
            00h not installed, OK to install
            01h not installed, not OK to install
            FFh installed
                BX = 5456h ("TV")
Range:  AH=80h to AH=FFh, selected by commandline switch
SeeAlso: AX=BC06h"EGA",INT 10/AH=FAh"EGA"
--------s-2FBC00BX3F3F-----------------------
INT 2F - MediaVision MVSOUND.SYS - INSTALLATION CHECK
        AX = BC00h
        BX = 3F3Fh ('??')
        CX = 0000h
        DX = 0000h
Return: if installed, BX XOR CX XOR DX = 4D56h ('MV')
Program: MVSOUND.SYS is a driver for the MediaVision ProAudio Spectrum family
          of sound boards; its primary programmer was Bryan Crane
SeeAlso: AX=BC01h"MVSOUND",AX=BC02h,AX=BC03h,AX=BC04h,AX=BC06h"MVSOUND"
--------s-2FBC01-----------------------------
INT 2F - MediaVision MVSOUND.SYS - GET VERSION
        AX = BC01h
        BX = magic value 6D20h ('m ')
        CX = magic value 2076h (' v')
        DX = magic value 2020h ('  ')
Return: BX = ASCII major version (leading zeros significant)
        CX = ASCII minor version (leading zeros significant)
SeeAlso: AX=BC00h/BX=3F3Fh
--------s-2FBC02-----------------------------
INT 2F - MediaVision MVSOUND.SYS - GET STATE TABLE POINTER
        AX = BC02h
Return: AX = 4D56h ('MV')
        BX:DX -> state table
SeeAlso: AX=BC00h/BX=3F3Fh,AX=BC03h
--------s-2FBC03-----------------------------
INT 2F - MediaVision MVSOUND.SYS - GET FUNCTION TABLE POINTER
        AX = BC03h
Return: AX = 4D56h ('MV')
        BX:DX -> function table
        CX = ??? (000Eh)
SeeAlso: AX=BC00h/BX=3F3Fh,AX=BC02h
--------s-2FBC04-----------------------------
INT 2F - MediaVision MVSOUND.SYS - GET DMA AND IRQ CHANNELS
        AX = BC04h
Return: AX = 4D56h ('MV')
        BL = DMA channel
        CL = IRQ number
SeeAlso: AX=BC00h/BX=3F3Fh,AX=BC01h"MVSOUND"
--------V-2FBC06-----------------------------
INT 2F U - MS Windows 3.0, DOS 5+ EGA.SYS - GET VERSION INFO
        AX = BC06h
Return: BX = 5456h ("TV")
        CH = major version
        CL = minor version
        DL = revision
SeeAlso: AX=BC00h"EGA",INT 10/AH=FAh"EGA"
--------s-2FBC06-----------------------------
INT 2F - MediaVision MVSOUND.SYS - GET STATUS STRING
        AX = BC06h
Return: AX = 4D56h ('MV')
        DX:BX -> status string (first byte 0Ch if no status message to display)
SeeAlso: AX=BC00h/BX=3F3Fh,AX=BC01h"MVSOUND",AX=BC0Bh"MVSOUND"
--------s-2FBC0B-----------------------------
INT 2F - MediaVision MVSOUND.SYS - GET EXECUTABLE PATH
        AX = BC0Bh
Return: BX:DX -> ASCIZ path for MVPROAS.EXE, 0000h:0000h if not available
SeeAlso: AX=BC00h/BX=3F3Fh
--------s-2FBC0E-----------------------------
INT 2F - MediaVision MVSOUND.SYS - RE-INITIALIZE INT 09 HANDLER
        AX = BC0Eh
Return: BX = status
            0000h on failure
                AX = 0000h
            FFFFh if successful
                DX:AX -> prior INT 09 handler
Desc:   re-initialize INT 09 handler to re-enable hotkeys (e.g. after loading
          KEYB)
--------U-2FBE00-----------------------------
INT 2F - REDVIEW - INSTALLATION CHECK
        AX = BE00h
Return: AL = FFh if installed
Program: REDVIEW is a public-domain TSR by Alexandr Novy and Petr Horak which
          copies data sent to standard output to standard error when the
          former has been redirected to a file, thus allowing the data to
          be seen on the screen at the same time it is captured in a file
--------N-2FBF00-----------------------------
INT 2F - PC LAN PROGRAM REDIRIFS.EXE internal - INSTALLATION CHECK
        AX = BF00h
Return: AL = FFh if installed
Note:   this function is also supported by NetSoft's DOS-NET v1.20+; however,
          none of the remaining BFxxh calls are supported
SeeAlso: AX=BF01h,AX=BF80h,INT 2A/AX=4147h
--------N-2FBF01-----------------------------
INT 2F U - PC LAN PROGRAM REDIRIFS.EXE internal - ???
        AX = BF01h
        ???
Return: ???
SeeAlso: AX=BF00h
--------N-2FBF80-----------------------------
INT 2F - PC LAN PROG REDIR.SYS internal - SET REDIRIFS ENTRY POINT
        AX = BF80h
        ES:DI -> FAR entry point to IFS handler in REDIRIFS
Return: AL = FFh if installed
            ES:DI -> internal workspace
Note:   all future IFS calls to REDIR.SYS are passed to the ES:DI entry point
SeeAlso: AX=BF00h
--------F-2FC0-------------------------------
INT 2F - METZ XpressFax Hardware TSR (CLASS2) - API
        AH = C0h
        AL = function code (01h to 15h)
Return: ???
SeeAlso: AX=C000h/BX=444Bh,AX=CB00h/BX=4D53h
--------N-2FC000-----------------------------
INT 2F - Novell ODI Link Support Layer (LSL.COM) - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if installed
            DX:BX -> FAR entry point (see #02986,#02987,#02988)
            ES:SI -> signature string "LINKSUP$"
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
Note:   on return, ES = DX for LSL v1.10 and v2.05; LSL makes use of this in
          its search for a previous installation
SeeAlso: AX=5100h,AX=C000h"NESL"

(Table 02986)
Call LSL function "Request MLID Registration" with:
        BX = 0001h
        ES:SI -> registration??? record (see #02990)
        DS:DI -> buffer for LSL information block (see #02991)
Return: AX = completion code (0000h,8001h) (see #02989)
        DS:DI buffer filled if successful
        BX,CX corrupted
Note:   see "Novell LAN Driver Developer's Guide, Volume III" for more details

(Table 02987)
Call LSL function "get support entry points" with:
        BX = 0002h
        ES:SI -> buffer for entry point record (see #02992)
Return: ES:SI buffer filled

(Table 02988)
Call LSL function "Request MLID API entry point" with:
        BX = 0003h
Return: ES:SI -> MLID (Multiple Link Interface Driver) API entry point
                (call with BX=function 00h-10h, not range-checked)
Note:   LSL v1.10 and v2.05 execute BX=0003h for BX=0000h and any BX >= 0003h

(Table 02989)
Values for LSL completion code:
 0000h  successful
 8001h  out of resources
 8002h  bad parameter
 8003h  no more items
 8004h  item not present
 8005h  failed
 8006h  receive overflow
 8007h  canceled
 8008h  bad command
 8009h  duplicate entry
 800Ah  no such handler
 800Bh  no such driver

Format of LSL registration record:
Offset  Size    Description     (Table 02990)
 00h    DWORD   -> ??? FAR function (to be called with ES:SI -> ??? and
                  returning AX = completion code)
 04h    DWORD   -> ???
 08h    DWORD   -> ??? data (at least 3Eh bytes)

Format of LSL information block:
Offset  Size    Description     (Table 02991)
 00h    DWORD   -> ??? entry point (called with BX=function 00h-11h)
 04h    WORD    ???
 06h    WORD    ???
Note:   due to a fencepost error, LSL v2.05 (distributed with Novell DOS 7)
          will crash if the above entry point is called with BX=0012h

Format of entry point record:
Offset  Size    Description     (Table 02992)
 00h    DWORD   pointer to protocol support entry point in LSL (see #02993)
 04h    DWORD   pointer to general support entry point in LSL (see #02994)

(Table 02993)
Call protocol support entry point with:
        BX = function number
            0000h ???
            0001h ???
            0002h ???
            0003h "ScheduleAESEvent"
                ES:SI -> AES ECB to be scheduled (see #02997)
                Return: ES,SI preserved
            0004h "CancelAESEvent"
                ES:SI -> ECB to be cancelled (see #02997)
                Return: ES,SI preserved
            0005h "GetIntervalMarker"
                Return: DX:AX = current interval marker in milliseconds
                        all other registers preserved
            0006h "RegisterStack"
                AX = logical board number
                ES:SI -> bound stack info structure (see #03007)
                Return: BX = assigned Stack ID if AX=0000h
            0007h "DeRegisterStack"
                AX = protocol stack's assigned Stack ID
            0008h "RegisterDefaultStack"
                AX = logical board number
                ES:SI -> stack info structure (see #03008)
            0009h "DeRegisterDefaultStack"
                AX = logical board number
            000Ah "RegisterPrescanStack"
                AX = logical board number
                ES:SI -> stack info structure (see #03008)
            000Bh "DeRegisterPrescanStack"
                AX = logical board number
            000Ch "SendPacket"
                ES:SI -> send ECB
                Return: interrupts disabled
            000Dh ???
            000Eh ???
            000Fh ???
            0010h "GetStackIDFromName"
                ES:SI -> counted NUL-terminated protocol name (max 15 chars)
                Return: BX = Stack ID if AX=0000h
            0011h "GetPIDFromStackIDBoard"
                AX = Stack ID for protocol
                CX = logical board number
                ES:SI -> 6-byte buffer for protocol ID
            0012h "GetMLIDControlEntry"
                AX = logical board number
                Return: ES:SI -> MLID control handler (see #02995) if AX=0000h
            0013h "GetProtocolControlEntry"
                AX = Stack ID or
                        FFFEh Prescan stack
                            CX = logical board number
                        FFFFh default protocol
                            CX = logical board number
                Return: ES:SI -> protocol stack control entry point if AX=0000h
                                  (see #02996)
            0014h "GetLSLStatistics"
                Return: AX = 0000h (successful)
                        ZF set
                        ES:SI -> LSL statistics table (see #02999)
            0015h "BindStack"
                AX = protocol stack's assigned Stack ID
                CX = logical board number
            0016h "UnbindStack"
                AX = protocol stack's assigned Stack ID
                CX = logical board number
            0017h "AddProtocolID"
                AX = frame type ID code
                ES:SI -> 6-byte protocol ID
                CX:DI -> counted NUL-terminated short protocol name (max 15 ch)
            0018h "RelinquishControl"
                Return: after LSL performs any necessary background processing
            0019h "GetLSLConfiguration"
                Return: AX = 0000h (successful)
                        ZF set
                        ES:SI -> LSL configuration table (see #02998)
            001Ah "GetTickMarker"
                Return: AX = number of 55ms ticks since LSL loaded
                        BX destroyed
Return: AX = completion code (see #02989)
        ZF set if successful
        SS:SP, DS, BP preserved; most other registers may be destroyed

(Table 02994)
Call general support entry point with:
        BX = function number
            0000h "Allocate Memory" (obsolete)
                 always returns AX=8008h (BAD_COMMAND)
            0001h "Free Memory" (obsolete)
                 always returns AX=8008h (BAD_COMMAND)
            0002h "Realloc Memory" (obsolete)
                 always returns AX=8008h (BAD_COMMAND)
            0003h "Memory Statistics" (obsolete)
                 always returns AX=8008h (BAD_COMMAND)
            0004h "Add Memory To Pool" (obsolete)
                 always returns AX=8008h (BAD_COMMAND)
            0005h "AddGeneralService"
                ES:SI -> General Service Control Block (see #03009)
            0006h "RemoveGeneralService"
                ES:SI -> General Service Control Block (see #03009)
            0007h "GetNETcfgPath"
                Return: AX = 0000h (successful)
                        DS:DX -> ASCIZ pathname for NET.CFG
            0008h U ???  (in LSL 1.10)
                Return: AX = 0000h
                        ES:SI -> ??? (a 22-byte data area)
            000Ah "GetCriticalSectionStatus"
                Return: BX = total outstanding calls to "StartCriticalSection"
            000Bh "ServiceEvents"
                interrupts disabled
                Return: interrupts disabled
            0010h "GetStackECB"
                DS:DI -> Lookahead structure (see #03010)
                interrupts disabled
                Return: ES:SI -> ECB if successful (AX=0000h,ZF set)
                        interrupts disabled
            8000h-FFFFh reserved for user general service providers
Return: AX = completion code (see #02989)
        ZF set if successful
        SS:SP, DS, BP preserved

(Table 02995)
Call MLID control handler with:
        AX = logical board number
        BX = function number
            0000h "GetMLIDConfiguration"
                Return: ES:SI -> MLID's configuration table if successful
                                  (see #03002 for format)
            0001h "GetMLIDStatistics"
                Return: ES:SI -> MLID's statistics table if successful
                                  (see #03002 for format)
            0002h "AddMulticastAddress"
                ES:SI -> 6-byte multicast address to add
            0003h "DeleteMulticastAddress"
                ES:SI -> 6-byte multicast address to delete
            0005h "MLIDShutdown"
                CX = type
                    0000h permanent (also deregisters from LSL)
                    other temporary (shutdown hardware only)
            0006h "MLIDReset" reinitialize board / restart from temp shutdown
            0007h "Create Connection" (obsolete?)
                ???
            0008h "Delete Connection" (obsolete?)
                ???
            0009h "SetLookAheadSize"
                CX = requested lookahead size (00h-80h)
            000Ah "PromiscuousChange"
                CX = what to receive promiscuously
                    bit 0: MAC frames
                    bit 1: non-MAC frames
            000Bh "RegisterReceiveMonitor"
                CX = subfunction
                    0000h disable receive monitoring
                    else  enable receive monitoring
                ES:SI -> monitor receive routine
                ES:DI -> monitor transmit routine
            000Ch "Driver Poll" (obsolete?)
                ???
Return: AX = completion code (see #02989)
        ZF set if successful
Note:   not all boards/MLIDs support function 0010h; see bit 13 in the MLID
          mode flags field of the MLID's configuration table

(Table 02996)
Call protocol stack control entry point with:
        BX = function number
            0000h "GetProtocolStackConfiguration"
                Return: ES:SI -> protocol stack's configuration table
                                   (see #03001)
            0001h "GetProtocolStackStatistics"
                Return: ES:SI -> protocol stack's statistics table (see #03000)
            0002h "BindToMLID"
                CX = board number to bind to
                ES:SI -> implementation-dependant parameter string
            0003h "UnBindFromMLID"
                CX = board number from which protocol should unbind
                ES:SI -> optional implementation-dependant parameter string
            0004h "MLIDDeRegistered"
                CX = board number that has de-registered from LSL
Return: AX = status
            0000h successful
            else implementation-dependant error codes
        ZF set if successful
        SS:SP, DS, BP preserved

Format of AES ECB:
Offset  Size    Description     (Table 02997)
 00h    DWORD   "AESLink" pointer used by LSL for list management
 04h    DWORD   number of milliseconds to wait
 08h    DWORD   "AESStatus" (is set to 00000000h when AES ESR is invoked)
 0Ch    DWORD   -> function to be invoked when time expires
                ES:SI will point to this structure on entry,
                DS, BP, and SS:SP must be preserved.
SeeAlso: #03011

Format of LSL Configuration Table:
Offset  Size    Description     (Table 02998)
 00h    BYTE    major version of configuration table
 01h    BYTE    minor version of configuration table (decimal, 0-99)
 02h  8 BYTEs   reserved
 0Ah    BYTE    LSL major version (decimal)
 0Bh    BYTE    LSL minor version (decimal, 0-99)
---LSL 1.0x ---
 0Ch 14 BYTEs   reserved
---LSL 1.10+ ---
 0Ch    WORD    maximum number of boards which LSL can handle
 0Eh    WORD    maximum number of protocol IDs which LSL can handle
 10h 12 BYTEs   reserved

Format of LSL Statistics Table:
Offset  Size    Description     (Table 02999)
 00h    BYTE    major version of statistics table format
 01h    BYTE    minor version of statistics table format (decimal, 0-99)
 02h    WORD    "GenericCounters" number of counters in static portion of
                  table
 04h    DWORD   "ValidCountersMask" bit mask indicating which generic
                  counters are actually used.  Bit 31 = TotalTxPackets, bit 30
                  is the next field, etc.
 08h    DWORD   "TotalTxPackets" total SendPacket requests made
 0Ch    DWORD   reserved
 10h    DWORD   reserved
 14h    DWORD   "AESEventsCount" number of completed AES events
 18h    DWORD   "PostponedEvents" number of events postponed due to critical
                  sections inside the MLIDs
 1Ch    DWORD   "CancelAESFailures" number of times CancelAESEvent failed
 20h    DWORD   reserved
 24h    DWORD   reserved
 28h    DWORD   "TotalRxPackets" total number of GetStackECB requests
 2Ch    DWORD   "UnclaimedPackets" total number of packets not consumed by a
                  protocol stack
 30h    WORD    "NumberCustom" number of custom variables that follow
 32h  N DWORDs  custom counters
      N DWORDs  -> CustomCounterStrN (one per custom counter)
        var     length-prepended and NULL terminated string for Counter 0
        ...
        var     length-prepended and NULL terminated string for Counter N-1
SeeAlso: #03000,#03006

Format of Protocol Stack Statistics Table:
Offset  Size    Description     (Table 03000)
 00h    BYTE    statistics table major version
 01h    BYTE    statistics table minor version (decimal, 0-99)
 02h    WORD    number of generic counters following
 04h    DWORD   "ValidCountersMask" (bitmask, bit 31 is TotalTxPackets)
 08h    DWORD   TotalTxPackets
 0Ch    DWORD   TotalRxPackets
 10h    DWORD   IgnoredRxPackets
 14h    WORD    number of custom counters
 16h  N DWORDs  custom counters
      N DWORDs  -> CustomCounterStrN (one per custom counter)
        var     length-prepended and NULL terminated string for Counter 0
        ...
        var     length-prepended and NULL terminated string for Counter N-1
SeeAlso: #02999,#03006

Format of Protocol Stack Configuration Table:
Offset  Size    Description     (Table 03001)
 00h    BYTE    configuration table major version
 01h    BYTE    configuration table minor version (decimal, 0-99)
 02h    DWORD   -> counted NUL-terminated long descriptive name for protocol
 06h    DWORD   -> counted NUL-terminated short name for protocol (15 chars)
 0Ah    BYTE    protocol stack major version
 0Bh    BYTE    protocol stack minor version (decimal, 0-99)
 0Ch 16 BYTEs   reserved for future use

Format of MLID Configuration Table:
Offset  Size    Description     (Table 03002)
 00h 26 BYTEs   signature 'HardwareDriverMLID        ' (8 spaces on end)
 1Ah    BYTE    configuration table major version
 1Bh    BYTE    configuration table minor version (decimal, 0-99)
 1Ch  6 BYTEs   node address
 22h    WORD    MLID mode flags (see #03003)
 24h    WORD    board number
 26h    WORD    board instance (if more than one of same board installed)
 28h    WORD    maximum packet size
 2Ah    WORD    BestDataSize
 2Ch    WORD    WorstDataSize
 2Eh    DWORD   -> counted NUL-terminated long name for NIC
 32h    DWORD   -> counted NUL-terminated short name for NIC (8 chars max)
 36h    DWORD   -> counted NUL-terminated Frame and Media type
 3Ah    WORD    reserved (0000h)
 3Ch    WORD    frame type ID
 3Eh    WORD    TransportTime (milliseconds)
 40h    DWORD   -> SourceRouteHandler for TokenRing. (Used by ROUTE.COM)
 44h    WORD    lookahead size
 46h    WORD    line speed (Mbps if high bit clear, else Kbps)
 48h    WORD    QueueDepth
 4Ah  6 BYTEs   reserved (0)
 50h    BYTE    driver major version
 51h    BYTE    driver minor version (decimal, 0-99)
 52h    WORD    bus/multicast flags (see #03004)
 54h    WORD    send retries
 56h    DWORD   ConfigTableLink
 5Ah    WORD    MLID sharing flags (see #03005)
 5Ch    WORD    slot number
 5Eh    WORD    I/O address 1
 60h    WORD    I/O range 1
 62h    WORD    I/O address 2
 64h    WORD    I/O range 2
 66h    DWORD   memory address 1
 6Ah    WORD    memory size 1
 6Ch    DWORD   memory address 2
 70h    WORD    memory size 2
 72h    BYTE    interrupt line 1
 73h    BYTE    interrupt line 2
 74h    BYTE    DMA line 1
 75h    BYTE    DMA line 2

Bitfields for MLID mode flags:
Bit(s)  Description     (Table 03003)
 15     MLID supports Octet Reversal
 14     node address is non-canonical
 13     promiscuous mode is supported
 12-8   reserved
 7      LDataSize field in LookAhead structure supported
 6      raw send supported
 5      MLID needs to be polled by LSL
 4      reserved (0)
 3      multicasting is supported
 2      not currently used by DOS ODI, set to 0.
 1      network card uses DMA.
 0      RealDriverBit, always set to 1.

Bitfields for bus/multicast flags:
Bit(s)  Description     (Table 03004)
 10-9   specialized multicast support
        00 = Group addressing is default for medium
        01 = Invalid
        10 = Filter group address in MLID.
        11 = Adapter filters group address.
 2      supports Micro Channel cards
 1      supports ISA cards
 0      supports EISA cards

Bitfields for MLID sharing flags:
Bit(s)  Description     (Table 03005)
 8      NIC can share DMA2
 7      NIC can share DMA1
 6      NIC can share IRQ2
 5      NIC can share IRQ1
 4      NIC can share Memory2
 3      NIC can share Memory1
 2      NIC can share IO2
 1      NIC can share IO1
 0      MLID is currently shut down

Format of MLID Statistics Table:
Offset  Size    Description     (Table 03006)
 00h    BYTE    driver statistics table major version
 01h    BYTE    driver statistics table minor version (decimal, 0-99)
 02h    WORD    number of generic counters (typically 13)
 04h    DWORD   "ValidCountersMask" (bit mask, bit 31 is TotalTxCount)
 08h    DWORD   TotalTxCount
 0Ch    DWORD   TotalRxCount
 10h    DWORD   NoECBAvailableCount
 14h    DWORD   TxTooBigCount
 18h    DWORD   TxTooSmallCount
 1Ch    DWORD   RxOverflowCount
 20h    DWORD   RxTooBigCount
 24h    DWORD   RxTooSmallCount
 28h    DWORD   TxMiscCount
 2Ch    DWORD   RxMiscCount
 30h    DWORD   TxRetryCount
 34h    DWORD   RxChecksumErrorCount
 38h    DWORD   RxMismatchCount
 3Ch    WORD    number of custom counters
 3Eh  N DWORDs  custom counters
      N DWORDs  -> CustomCounterStrN (one per custom counter)
        var     length-prepended and NULL terminated string for Counter 0
        ...
        var     length-prepended and NULL terminated string for Counter N-1
SeeAlso: #02999,#03000

Format of bound stack info structure:
Offset  Size    Description     (Table 03007)
 00h    DWORD   -> protocol stack's short name (counted, NUL-terminated)
 04h    DWORD   -> receive handler
 08h    DWORD   -> control handler

Format of stack info structure:
Offset  Size    Description     (Table 03008)
 00h    DWORD   -> receive handler
 04h    DWORD   -> control handler

Format of General Service Control Block:
Offset  Size    Description     (Table 03009)
 00h    DWORD   -> next GSCB (maintained internally by LSL)
 04h    DWORD   -> entry point for general service handler
 08h    WORD    command code for this general service (8000h-FFFFh)
Note:   the control block must not be altered or deallocated until the general
          service is removed

Format of Lookahead structure:
Offset  Size    Description     (Table 03010)
 00h    DWORD   -> Media header
 04h    DWORD   -> lookahead buffer
 08h    WORD    length of lookahead buffer
 0Ah  6 BYTEs   protocol ID
 10h    WORD    logical board number
 12h    WORD    lookahead size

Format of ODI ECB:
Offset  Size    Description     (Table 03011)
 00h    DWORD   link to next ECB
 04h    DWORD   link to previous ECB
 08h    WORD    general status
                0000h received successfully
                8006h packet overflow
                8007h reception aborted (data not valid)
 0Ah    DWORD   -> event service routine or RETF (never 0000h:0000h)(see #03012)
 0Eh    WORD    protocol stack identifier
 10h  6 BYTEs   protocol ID (sending only)
 16h    WORD    MLID board number (sending only)
 18h  6 BYTEs   MAC destination address
 1Eh  4 BYTEs   driver workspace
 22h  8 BYTEs   protocol workspace
 2Ah    WORD    total length of sent buffer
 2Ch    WORD    fragment count
 2Eh  2 WORDs   segment,offset of first fragment buffer
 32h    WORD    length of first fragment buffer
        ...
SeeAlso: #02997

(Table 03012)
Values event service routine is called with:
        ES:SI -> associated ODI ECB (see #03011)
        interrupts disabled
Return: DS,BP,SS,SP preserved
        interrupt disabled
Notes:  the service routine may invoke any IPX/ODI function except CloseSocket
        it is safe to send a packet and wait for completion if enough stack
          space is available
--------N-2FC000-----------------------------
INT 2F - Novell NetWare Event Service Layer (NESL) 1.0 - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if installed
            DX:BX -> FAR entry point (see #03013,#03014,#03015,#03016,#03017,#03018)
            ES:SI -> signature string "NESL_EVENTS"
Program: NESL is a generic interface for event handling in ODI drivers and
          other NetWare-oriented modules.  Primarily intended to support
          power management and "hot swapping" of PCMCIA cards, but it is not
          limited to this.
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
SeeAlso: AX=C000h"Link Support Layer",AX=C000h"NETWARN"

(Table 03013)
Call NESL function GetNESLConfigPointer with:
        BX = 0000h
Return: AX = completion code (0000h,8008h) (see #03019)
        ES:SI -> NESL configuration table if successful (see #03020)
        BP,DS,STACK preserved
Desc:   Obtain a pointer to the NESL Configuration Table
SeeAlso: #03014,#03017

(Table 03014)
Call NESL function RegisterEventProducer with:
        BX = 0001h
        ES:SI -> Producer Event Control Block (PECB) (see #03021)
Return: AX = completion code (0000h, 8005h, 8008h) (see #03019)
        ES:SI -> still points to PECB
        BP,DS,STACK preserved
Desc:   Allows a module to register as a producer of a given event class
Note:   PECB_ClassName and PECB_Flags must be filled in on entry
SeeAlso: #02870,#03015,#03016,#03017

(Table 03015)
Call NESL function DeRegisterEventProducer with:
        BX = 0002h
        ES:SI -> PECB previously passed to RegisterEventProducer (see #03021)
Return: AX = completion code (0000h, 8002h, 8008h) (see #03019)
        ES:SI -> still points to PECB
        BP,DS,STACK preserved
Desc:   Allows a module to de-register as a producer of a given event class
SeeAlso: #03014,#03018

(Table 03016)
Call NESL function EventNotification with:
        BX = 0003h
        ES:SI -> PECB previously registered (see #03021)
Return: AX = completion code (0h, 8005h, 8008h) (see #03019)
        ES:SI -> still points to PECB
        BP,DS,STACK preserved
Desc:   Allows a module to signal that an event has just occurred in a given
          event class.
Notes:  Once called, NESL will generate corresponding callouts for this
          event, as described in Table #03023.
        on entry, the PECB_DataPtr must point at an Event Parameter Block (EPB)
          (see #03024) filled in to match the desired event
SeeAlso: #03014

(Table 03017)
Call NESL function RegisterEventConsumer with:
        BX = 0004h
        ES:SI -> Consumer Event Control Block (CECB) (see #03022)
Return: AX = completion code (0h, 8005h, 8008h) (see #03019)
        ES:SI -> still points to CECB
        BP,DS,STACK preserved
Desc:   Allows a module to register as a consumer of a given event class
Note:   on entry, the CECB_ClassName, CECB_NotifProc and CECB_OSILevel must be
          filled in.
SeeAlso: #03014,#03018

(Table 03018)
Call NESL function DeRegisterEventConsumer with:
        BX = 0005h
        ES:SI -> CECB previously passed to RegisterEventConsumer (see #03022)
Return: AX = completion code (0h, 8002h, 8008h) (see #03019)
        ES:SI -> still points to CECB
        BP,DS,STACK preserved
Desc:   Allows a module to de-register as a consumer of a given event class
SeeAlso: #03015,#03017

(Table 03019)
Values for NESL Error code:
 0000h  Successful
 8002h  Bad Parameter
 8005h  Fail
 8008h  Bad Command

Format of NESL Configuration Table:
Offset  Size    Description     (Table 03020)
 00h    WORD    NESL_Cfg_MajVer  Major Version of this table (=1)
 02h    WORD    NESL_Cfg_MinVer  Minor Version of this table (=0)
 04h    DWORD   NESL_Cfg_ModLName   -> ASCIZ long name of NESL module
                (typically -> "NetWare Event Service Layer for 16-Bit DOS")
 08h    DWORD   NESL_Cfg_ModSName   -> ASCIZ short name of NESL module
                (typically -> "NESL")
 0Ch    WORD    NESL_Cfg_ModMajVer  Major Version of NESL itself (=1)
 0Eh    WORD    NESL_Cfg_ModMinVer  Minor Version of NESL itself (=0)

Format of NESL Producer Event Control Block (PECB):
Offset  Size    Description     (Table 03021)
 00h    WORD    PECB_MajVer  Major Version of this structure (=1)
 02h    WORD    PECB_MinVer  Minor Version of this structure (=0)
 04h    DWORD   PECB_NextProducer   -> next PECB.  NULL if last.
 08h    DWORD   PECB_ClassName      -> ASCIZ string identifying event
                                          class (see #03025)
 0Ch    DWORD   PECB_ConsumerList   -> list of consumers for this event class
 10h    DWORD   PECB_DataPtr        -> points to additional data during events
 14h    DWORD   PECB_Flags
                Bit 0   =0  consumers should be called "top down" for this
                            event class.  (OSI level 7 down to OSI level 1)
                        =1  consumers should be called "bottom up"
                Bits 1-31   Reserved =0
 18h  8 BYTEs   PECB_Reserved (all zeros)
Note:   Although the event producer provides the memory for the PECB, the
          NESL module controls this memory until the event class is
          de-registered.
        While owned by NESL, this structure should be treated as read-only,
          except for the PECB_DataPtr field.

Format of NESL Consumer Event Control Block (CECB):
Offset  Size    Description     (Table 03022)
 00h    WORD    CECB_MajVer  Major Version of this structure (=1)
 02h    WORD    CECB_MinVer  Minor Version of this structure (=0)
 04h    DWORD   CECB_NextConsumer   -> next CECB.  NULL if last.
 08h    DWORD   CECB_ClassName      -> ASCIZ string identifying event
                                          class (see #03025)
 0Ch    DWORD   CECB_NotifProc      -> FAR CALL event handler (see #03023)
 10h    WORD    CECB_OSILevel
                Bits 4-7 = OSI Layer of this module (1 through 7)
                Bits 0-3 = relative ordering with other modules on same layer
 13h 14 BYTEs   CECB_Reserved (all zeros)
Note:   Although the event consumer provides the memory for the CECB, the
          NESL module controls this memory until the consumer is de-registered.
        While owned by NESL, this structure should be treated as read-only,

(Table 03023)
Values NESL Consumer Notification Procedure is called with:
        ES:SI -> Event Parameter Block (EPB) (see #03024)
Return: AX = completion code (0000h, 8005h) (see #03019)
        ES:SI -> still points to EPB
Desc:   Called by NESL to notify the consumer when an event has occurred in
          an event class for which it has registered.
SeeAlso: #03022

Format of NESL Event Parameter Block (EPB):
Offset  Size    Description     (Table 03024)
 00h    WORD    EPB_MajVer  Major Version of this structure (=1)
 02h    WORD    EPB_MinVer  Minor Version of this structure (=0)
 04h    DWORD   EPB_ClassName  -> ASCIZ string identifying event class
                                  (see #03025)
 08h    DWORD   EPB_EventName  -> ASCIZ string identifying event within
                                  class (see #03026)
 0Ch    DWORD   EPB_ModuleName -> ASCIZ string identifying module
                                  producing event
 10h    DWORD   EPB_DataPtr0   -> event-defined data or NULL if not used
 14h    DWORD   EPB_DataPtr1   -> event-defined data or NULL if not used
 18h  8 BYTEs   EPB_Reserved (all zeros)

(Table 03025)
Values for NESL Event Class Names:
 Event Class            Description
 -------------------    -----------------------------------------
 Service Suspend        Suspension of a service.  Called top-down.
 Service Resume         Resumption/availability of a service. Called bottom-up.
 Service/Status Change  Change in status or level of service.  Called top-down.
 Suspend Request        Request to suspend a service.  Called bottom-up.
Note:   Contact Novell Labs to register new event classes.

(Table 03026)
Values for NESL Event Names:
 Event Name                     Class               Description
 --------------------------     -------------       ---------------------------
 MLID Cable Disconnect          Service Suspend     Cable disconnected from NIC
 MLID Card Removal              Service Suspend     PCMCIA card removed
 MLID Hardware Failure          Service Suspend     Serious hardware
                                                          failure in NIC
 MLID Not In Range              Service Suspend     Wireless access point
                                                          is out of range
 MLID Shutdown                  Service Suspend     MLID was shut down
 MLID Media Access Denied       Service Suspend     Access to physical
                                                          medium unsuccessful
 MLID Cable Reconnect           Service Resume      Cable re-connected to NIC
 MLID Card Insertion Complete   Service Resume      PCMCIA card inserted
 MLID In Range                  Service Resume      Wireless access point
                                                          in range
 MLID Reset                     Service Resume      MLID was just reset
 MLID Access Point Change       Serv/Status Change  Station has moved to
                                                          new access point
 MLID Speed Change              Serv/Status Change  Change in communic. speed
Note:   Contact Novell Labs to register new event names.
        For all predefined events above, EPB_DataPtr0 (see #03024) points
          to the MLID Configuration table (see AX=C000h"ODI") for the
          affected MLID.
--------N-2FC000-----------------------------
INT 2F - Novell NetWare Connect NETWARN - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if installed
            SI = segment of resident portion
Program: NETWARN is a utility supplied with NetWare Connect to warn a
          remote dialup user when programs are about to be loaded slowly over
          the modem link.
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
Note:   on return, verify that it is NETWARN responding by examining signature
          at in NETWARN's data table in the resident segment (see #03027)
SeeAlso: AX=C000h"ODI",AX=C000h"NESL"

Format of NETWARN Configuration structure:
Offset  Size    Description     (Table 03027)
 103h 7 BYTEs   signature string "NETWARN"
 10Ah   BYTE    major version in ASCII (="1")
 10Bh   BYTE    minor version in ASCII (="0")
 10Ch   DWORD   minimum size of EXE cared about in bytes (/S=xxxx)
 110h   WORD    same value in kilobytes (see #03028 [bit 4])
 112h   BYTE    multiplex code (AH value) actually being used
 113h   WORD    options (see #03028)
 115h   DWORD   INT 21h vector before NETWARN loaded
 119h   DWORD   INT 2Fh vector before NETWARN loaded
 11Dh 16 BYTEs  ASCIIZ local name of last device which was checked
 12Dh 128 BYTEs ASCIIZ remote name of last device which was checked
Note:   the specified offsets are from the start of the resident segment

Bitfields for NETWARN options:
Bit(s)  Description     (Table 03028)
 0      ??? (=0)
 1      /U (Unload) selected (never in resident)
 2      /E (Enabled) Will trap & check EXEC's
 3      /D (Disabled) No EXEC checking done
 4      /S (Size) was set (see #03027 [offsets 010Ch and 0110h])
 5      /P (Path shown)
 6      /H or /? (Help) (never in resident)
SeeAlso: #03027
--------f-2FC000-----------------------------
INT 2F - FN32 32 character filename utilities - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if installed
           ES:DI -> signature string "FN32 32CHAR TSR"
Program: FN32 is a TSR which supports 32 character filenames under PC/MS-DOS
Note:   the TSR intercepts INT 21 calls and performs filename substitution by
          managing dictionary files in each directory which contains long
          filenames
--------M-2FC000-----------------------------
INT 2F - QMR - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if installed
            ES:DI -> signature string "QMR1!"
Program: QMR (Cove Software, Quick Mouse Reset) monitors the mouse
          service interrupt (int 33h) and substitutes a fast software
          reset (mouse fn 21h) for the slow hardware reset (mouse fn 0).
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
SeeAlso: AX=C001h"QMR",AX=C002h"QMR",AX=C003h"QMR"
--------V-2FC000-----------------------------
INT 2F - VGAsave v1.93 - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if installed
            BX = segment of resident code
Program: VGAsave is a freeware VGA-specific, mouse-aware screenblanker by Bill
          Javurek
Range:  AH=C0h to AH=FFh, selected by scanning for a free multiplex number
Note:   the transient portion of VGAsave compares the first 38 bytes of the
          resident code (addressed through BX) against its own copy of the
          resident code to complete the installation check
SeeAlso: INT 14/AX=AA01h,INT 2F/AH=93h
Index:  screen saver;VGAsave
--------V-2FC000-----------------------------
INT 2F - AD-DOS - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if installed
            BX = 4144h ('AD')
            CX = 2D44h ('-D')
            DX = 4F53h ('OS')
Program: AD-DOS is the DOS version of the After Dark screen blanker for
          MS Windows
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
SeeAlso: AX=C001h"AD-DOS",AX=C003h"AD-DOS",AX=C005h"AD-DOS",AX=C007h"AD-DOS"
SeeAlso: AX=C009h"AD-DOS",AX=C020h"AD-DOS",INT 14/AX=AA01h
Index:  screen saver;AD-DOS
--------U-2FC000-----------------------------
INT 2F U - WANG_ER.COM - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if installed
            ES = segment of resident code
Program: WANG_ER is a TSR from Compaq which permits Compaq systems equipped
          with 3-mode floppy drives to read Wang document diskettes
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
Note:   The installation check is completed by comparing the resident code
          with the copy in the transient program
--------i-2FC000-----------------------------
INT 2F O - ASPIHOOK.SYS - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if multiplex number in use
            ES:DI -> ASCIZ signature "ASPIHOOK" if ASPIHOOK.SYS installed
Program: ASPIHOOK is a device driver for monitoring SCSI activity through an
          ASPI host manager; it is part of the Personal Measure system
          activity monitor from Spirit of Performance, Inc.
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
SeeAlso: AX=C000h"PMEASURE"
--------i-2FC000-----------------------------
INT 2F - PMEASURE.EXE - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if multiplex number in use
            ES:DI -> ASCIZ signature "PMEASURE.EXE" if PMEASURE.EXE installed
Program: PMEASURE.EXE is a TSR for monitoring system hardware activity which
          is part of the Personal Measure system activity monitor from Spirit
          of Performance, Inc.
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
Note:   If a Personal Measure Hook Module, such as ASPIHOOK.SYS, is already
          installed, PMEASURE.EXE uses the next highest free multiplex number.
SeeAlso: AX=C000h"ASPIHOOK",AX=C000h"PERSONAL MEASURE"
--------i-2FC000-----------------------------
INT 2F - PERSONAL MEASURE - HOOK MODULE INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if installed
        ES:DI -> signature string "PMEASUREHOOK"
        AX = C000 if not installed, per mux id conventions
        DH = major release number (binary)
        DL = minor release number (binary)
Program: The Personal Measure system activity monitor from Spirit of
          Performance, Inc. uses an extensible series of modules to hook
          into various operating system interfaces and monitor system calls.
          Current hook modules are ASPIHOOK.SYS for ASPI device activity
          and CDRHOOK.SYS for non-ASPI CD-ROM activity.  All hook modules
          share the same mux id.
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
SeeAlso: AX=C000h"PMEASURE.EXE",AX=C001h"PERSONAL MEASURE"
--------c-2FC000-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if installed
            SI = signature value 20D6h
            DI = signature value 8761h
            ES:BX -> configuration table (see #03029)
            CX = ??? (0300h)
            DX = ??? (0020h)
Program: PCACHE is the resident print spooler portion of PrintCache by
          LaserTools; it may use either memory or disk space to spool output
Range:  AH=C0h to AH=FFh, selected by commandline switch
SeeAlso: AX=0100h/SI=20D6h,AX=C001h"PCACHE"

Format of PrintCache configuration table:
Offset  Size    Description     (Table 03029)
 00h 26 BYTEs   ASCIZ signature string "TORQ Configuration Table: "
 1Ah  2 BYTEs   ???
 1Ch    DWORD   -> data table (see #03030)
 20h  4 BYTEs   ASCIZ version string ("3.1" for v3.1)
 24h  5 BYTEs   ???
 29h 12 BYTEs   ASCIZ version date string ("Aug 31 1993" for v3.1)
 35h    WORD    buffered port type (01h = LPT, 02h = COM)
 37h    WORD    buffered port BIOS port number
 39h  5 BYTEs   ASCIZ buffered port name ("LPTn" or "COMn")
 3Eh    WORD    physical port type (01h = LPT, 02h = COM)
 40h    WORD    physical port BIOS port number
 42h  5 BYTEs   ASCIZ physical port name ("LPTn" or "COMn")
 47h    BYTE    port driver IRQ
 48h 21 BYTEs   ???
 5Dh    WORD    buffer size in K
 5Fh 27 BYTEs   ???
 7Ah    BYTE    popup hotkey shift states (see #00582 at INT 16/AH=02h)
 7Bh    BYTE    popup hotkey scan code (see #00006 at INT 09"IRQ1")
 7Ch  4 BYTEs   ???
 80h 20 BYTEs   ASCIZ printer type name
        ???

Format of PrintCache data table:
Offset  Size    Description     (Table 03030)
 00h  2 BYTEs   ???
 02h    DWORD   -> ??? entry point
        ???
--------U-2FC000-----------------------------
INT 2F - Frank Kintrup TSR Utilities - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if installed
            BX = program ID (see #03031)
            CX = 464Bh (signature "FK")
            DX = revision number (DH = major, DL = minor)
            ES = resident segment of TSR
Range:  AH=C0h to AH=FFh, selected by searching for a free multiplex number
SeeAlso: AX=C001h"Kintrup",AX=C002h"Kintrup"

(Table 03031)
Values for Frank Kintrup TSR program ID:
 4153h  "AS"    ASCII.COM       ASCII table with paste function
 434Ch  "CL"    CLOCK.COM       clock with date/time display and alarm
 5043h  "PC"    PCALC.COM       programmer's calculator with paste function
 5343h  "SC"    SCRSAVE.COM     screen saver with mouse support and hotkey
 5544h  "UD"    UNDEL.COM       undelete program like SMARTCAN or DPROTECT
--------K-2FC000-----------------------------
INT 2F U - HP 100LX/200LX - PUSHKEYS - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if possibly installed
Range:  AH=C0h to AH=FFh, selected by scanning for signature with AL=AEh
SeeAlso: AX=C001h"HP 100LX",AX=C0AEh"HP 100LX",AX=C0AFh"HP 100LX"
--------V-2FC000-----------------------------
INT 2F - DIMWIT - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if installed
            ES:DI -> signature string "DIMDOS" or "DIMWIN"
Program: DIMWIT is a freeware Windows-aware screen blanker by Larry Board
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
SeeAlso: AX=C000h"AD-DOS",AX=C001h"DIMWIT"
Index:  screen saver;DIMWIT
--------F-2FC000BX444B-----------------------
INT 2F - METZ XpressFax Hardware TSR (CLASS2) - INSTALLATION CHECK
        AX = C000h
        BX = 444Bh ('DK')
        CX = 4A4Eh ('AN')
Return: AL = status
            00h not installed, OK to install
            FFh installed
                BX = 646Bh ('dk')
                CX = 6A6Eh ('an')
Range:  AH=C0h to AH=FFh, selected automatically
SeeAlso: AH=C0h"METZ"
--------V-2FC000-----------------------------
INT 2F U - TSENGP.COM - INSTALLATION CHECK
        AX = C000h
Return: AL = status
            00h not installed, OK to install
            FFh installed
                DS = segment of resident code
Program: TSENGP.COM is a TSR supplied by Compaq to fix an incompatibility
          between some applications and Tseng ET4000-based video adapters
Range:  AH=C0h to AH=FFh, selected automatically
Note:   the installation check is completed by comparing the first eleven
          bytes at DS:005Fh against the TSR's code (80h FCh 06h 74h 0Ah
          80h FCh 07h 74h 05h EAh)
--------N-2FC000-----------------------------
INT 2F U - LapLink RemoteAccess (LLRA) - INSTALLATION CHECK
        AX = C000h
Return: AL = FFh if one of the components is installed
        CX:BX -> signature within LLRA component:
            "TSI_LapLinkCore" for LLRA1.EXE
            "TSI_Blackbird"   for LLRA2.EXE
            "TSI_Redirector"  for LLRA3.EXE
            "TSI_Compression" for LLRA4.EXE
        DL = major version number
        DH = minor version number
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
Note:   LapLink components are installed in the order listed above, but not
          necessarily all four; each gets its own multiplex number (default
          C0h-C3h)
SeeAlso: AX=C002h"LapLink",AX=C205h"LapLink",AX=C2F0h"LapLink"
SeeAlso: AX=C2F1h"LapLink",AX=C301h"LapLink",AX=C3F0h"LapLink"
SeeAlso: AX=C3F1h"LapLink"
--------M-2FC001-----------------------------
INT 2F - QMR - REQUEST HARDWARE RESET
        AX = C001h
Return: ES = QMR code segment
        AL destroyed
Desc:   this function is used to force a full mouse reset when QMR is installed
SeeAlso: AX=C000h"QMR",AX=C002h"QMR"
--------V-2FC001-----------------------------
INT 2F - DIMWIT - GET CONFIGURATION DATA
        AX = C001h
Return: ES:DI -> TSR configuration data (see #03032)
Program: DIMWIT is a freeware Windows-aware screen blanker by Larry Board
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
SeeAlso: AX=C000h"DIMWIT",AX=C001h"AD-DOS"
Index:  screen saver;DIMWIT

Format of DIMWIT TSR configuration data:
Offset  Size    Description     (Table 03032)
 00h    WORD    blanking delay in clock ticks
 02h    BYTE    instant-blanking hotkey scan code (see #00006)
                Ctrl and Alt must also be pressed
--------V-2FC001ES0000-----------------------
INT 2F - AD-DOS - GET RESIDENT CODE SEGMENT
        AX = C001h
        ES = 0000h
Return: AL = 00h if successful
            ES = AD-DOS TSR Code Segment
SeeAlso: AX=C000h"AD-DOS",AX=C001h"DIMWIT"
Index:  screen saver;AD-DOS
--------c-2FC001-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - GET ENTRY POINTS
        AX = C001h
Return: AL = FFh if installed
            ES:BX -> ???
            ES:DX -> ???
            ES:SI -> ???
            ES:DI -> ??? (equivalent to AX=C002h)
SeeAlso: AX=C000h"PCACHE",AX=C002h"PCACHE"
--------U-2FC001-----------------------------
INT 2F - Frank Kintrup TSR Utilities - CLOCK - DISABLE DISPLAY UPDATE
        AX = C001h
Range:  AH=C0h to AH=FFh, selected by searching for a free multiplex number
SeeAlso: AX=C000h"Kintrup",AX=C002h"Kintrup"
--------K-2FC001CX03FB-----------------------
INT 2F U - HP 100LX/200LX - PUSHKEYS - INTERNAL - UNINSTALL
        AX = C001h
        CX = 03FBh return address to continue uninstall if possible
Return: program uninstalled
Range:  AH=C0h to AH=FFh, selected by scanning for signature with AL=AEh
SeeAlso: AX=C000h"HP 100LX",AX=C0AEh"HP 100LX",AX=C0AFh"HP 100LX"
--------i-2FC001-----------------------------
INT 2F - PERSONAL MEASURE - PASS PARAMETERS TO HOOK MODULE(S)
        AX = C001h
        DX = segment of PMEASURE.EXE or 0000h
        BX = offset in PMEASURE.EXE or 0000h
        CX = offset in PMEASURE.EXE or 0000h
Return: None
Program: PMEASURE.EXE is a TSR for monitoring system hardware activity which
          is part of the Personal Measure system activity monitor from Spirit
          of Performance, Inc.  PMEASURE uses this call to inform its hook
          modules whether or not it is running and to pass information about
          shared data and procedures.
Warning: This information documents a function that is private to Personal
          Measure and is provided as information only.  It should NOT be called
          by any software other than Personal Measure.
SeeAlso: AX=C000h"PERSONAL MEASURE"
--------V-2FC002-----------------------------
INT 2F - AD-DOS - CHECK FOR NEW INPUT
        AX = C002h
Return: AL = 00h if successful
            BX = status
                0000h no input since last check
                0001h new input available
Note:   this call also resets the new-input flag
SeeAlso: AX=C000h"AD-DOS",AX=C004h
Index:  screen saver;AD-DOS
--------M-2FC002-----------------------------
INT 2F - QMR - DISABLE QMR
        AX = C002h
Return: ES = QMR code segment
        AL destroyed
Desc:   this call temporarily disables QMR
SeeAlso: AX=C000h"QMR",AX=C003h"QMR"
--------c-2FC002-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - GET BUFFER SIZE
        AX = C002h
Return: AX = ??? in K
        BX = size of print buffer in K
Program: PCACHE is the resident print spooler portion of PrintCache by
          LaserTools; it may use either memory or disk space to spool output
SeeAlso: AX=C000h"PCACHE"
--------U-2FC002-----------------------------
INT 2F - Frank Kintrup TSR Utilities - CLOCK - ENABLE DISPLAY UPDATE
        AX = C002h
Range:  AH=C0h to AH=FFh, selected by searching for a free multiplex number
SeeAlso: AX=C000h"Kintrup",AX=C002h"Kintrup"
--------N-2FC002-----------------------------
INT 2F U - LapLink RemoteAccess (LLRA) - Core - ???
        AX = C002h
        details not yet available
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
SeeAlso: AX=C000h"LapLink",AX=C002h"LapLink",AX=C2F0h"LapLink"
SeeAlso: AX=C2F1h"LapLink",AX=C301h"LapLink"
--------V-2FC003-----------------------------
INT 2F - AD-DOS - SET MINUTES TO WAIT
        AX = C003h
        BX = minutes to wait before blanking screen
Return: AL = 00h if successful
Program: AD-DOS is the DOS version of the After Dark screen blanker for
          MS Windows
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
Note:   this call also resets the delay timer
SeeAlso: AX=C000h"AD-DOS",AX=C004h
Index:  screen saver;AD-DOS
--------M-2FC003-----------------------------
INT 2F - QMR - ENABLE QMR
        AX = C003h
Return: ES = QMR code segment
        AL destroyed
Desc:   this call enables QMR after it has been disabled
SeeAlso: AX=C000h"QMR",AX=C002h"QMR"
--------c-2FC003-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - SET ??? FLAG
        AX = C003h
Return: BX destroyed
SeeAlso: AX=C004h"PCACHE"
--------V-2FC004-----------------------------
INT 2F - AD-DOS - GET MINUTES TO WAIT
        AX = C004h
Return: AL = 00h if successful
            BX = minutes to wait before blanking screen
SeeAlso: AX=C000h"AD-DOS",AX=C003h"AD-DOS"
Index:  screen saver;AD-DOS
--------c-2FC004-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - CLEAR ??? FLAG
        AX = C004h
Return: BX destroyed
SeeAlso: AX=C003h"PCACHE"
--------V-2FC005-----------------------------
INT 2F - AD-DOS - SET BLANKER STATUS
        AX = C005h
        BX = new state (0000h inactive, 0001h active) (default 0001h)
Return: AL = 00h if successful
SeeAlso: AX=C006h"AD-DOS"
Index:  screen saver;AD-DOS
--------c-2FC005-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - ???
        AX = C005h
        ???
Return: BX destroyed
        ???
Program: PCACHE is the resident print spooler portion of PrintCache by
          LaserTools; it may use either memory or disk space to spool output
Range:  AH=C0h to AH=FFh, selected by commandline switch
SeeAlso: AX=C000h"PCACHE"
--------V-2FC006-----------------------------
INT 2F - AD-DOS - GET BLANKER STATUS
        AX = C006h
Return: AL = 00h if successful
            BX = current state of screen blanker (0000h inactive, 0001h active)
Program: AD-DOS is the DOS version of the After Dark screen blanker for
          MS Windows
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
SeeAlso: AX=C000h"AD-DOS",AX=C005h"AD-DOS"
Index:  screen saver;AD-DOS
--------c-2FC006-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - ???
        AX = C006h
        ???
Return: BX destroyed
        ???
Note:   this function appears to be identical to AX=C007h
SeeAlso: AX=C000h"PCACHE",AX=C007h"PCACHE"
--------V-2FC007-----------------------------
INT 2F - AD-DOS - SET HOT KEY
        AX = C007h
        BX = hot key
        CL = hot key shift status
Return: AL = 00h if successful
SeeAlso: AX=C008h"AD-DOS"
Index:  screen saver;AD-DOS
--------c-2FC007-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - ???
        AX = C007h
        ???
Return: BX destroyed
        ???
Note:   this function appears to be identical to AX=C006h
SeeAlso: AX=C000h"PCACHE",AX=C006h"PCACHE"
--------V-2FC008-----------------------------
INT 2F - AD-DOS - GET CURRENT HOT KEY
        AX = C008h
Return: AX = status
            0000h successful
                BX = Hot Key
                CL = Hot Key Shift Status
            0008h otherwise
SeeAlso: AX=C000h"AD-DOS",AX=C007h"AD-DOS"
Index:  screen saver;AD-DOS
--------c-2FC008-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - CLEAR ??? FLAG
        AX = C008h
Return: BX destroyed
SeeAlso: AX=C000h"PCACHE",AX=C009h"PCACHE"
--------V-2FC009-----------------------------
INT 2F - AD-DOS - UNBLANK MONITOR
        AX = C009h
Return: AL = 00h if successful
Program: AD-DOS is the DOS version of the After Dark screen blanker for
          MS Windows
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
Note:   this function works by simulating keyboard activity
Index:  screen saver;AD-DOS
--------c-2FC009-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - SET ??? FLAG
        AX = C009h
Return: BX destroyed
Program: PCACHE is the resident print spooler portion of PrintCache by
          LaserTools; it may use either memory or disk space to spool output
Range:  AH=C0h to AH=FFh, selected by commandline switch
SeeAlso: AX=C000h"PCACHE",AX=C008h"PCACHE"
--------V-2FC00A-----------------------------
INT 2F - AD-DOS - ???
        AX = C00Ah
Return: AX = status
            0000h successful
                BH = ??
                BL = ??
            000Ah failed
Index:  screen saver;AD-DOS
--------c-2FC00A-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - ???
        AX = C00Ah
        ???
Return: AH = bit flags
            bit 5: ???
        AL = bit flags
            bit 4: ???
            bit 3: ???
        BX destroyed
        ???
SeeAlso: AX=C000h"PCACHE"
--------V-2FC00B-----------------------------
INT 2F - AD-DOS - ???
        AX = C00Bh
Return: AX = status
            0000h successful
            000Bh failed
Index:  screen saver;AD-DOS
--------c-2FC00B-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - NOP
        AX = C00Bh
Return: BX destroyed
SeeAlso: AX=C000h"PCACHE"
--------V-2FC00C-----------------------------
INT 2F - AD-DOS - SET ??? INTERNAL FLAG TO 01h
        AX = C00Ch
Return: AX = status
            0000h successful
            000Ch failed
Program: AD-DOS is the DOS version of the After Dark screen blanker for
          MS Windows
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
Index:  screen saver;AD-DOS
--------c-2FC00C-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - GET ???
        AX = C00Ch
Return: AX = ??? (0000h)
        BX = ??? (0000h)
        CX = ??? (0100h)
        DL = ???
        DH = ???
SeeAlso: AX=C000h"PCACHE"
--------c-2FC00D-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - SET ???
        AX = C00Dh
        DL = ???
Return: BX destroyed
Program: PCACHE is the resident print spooler portion of PrintCache by
          LaserTools; it may use either memory or disk space to spool output
Range:  AH=C0h to AH=FFh, selected by commandline switch
SeeAlso: AX=C000h"PCACHE"
--------V-2FC00E-----------------------------
INT 2F - AD-DOS - SET PASSWORD STATUS
        AX = C00Eh
        BX = new state (0000h disabled, 0001h enabled)
Return: ???
SeeAlso: AX=C000h"AD-DOS",AX=C00Fh"AD-DOS"
Index:  screen saver;AD-DOS
--------c-2FC00E-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - INSTALL ???
        AX = C00Eh
        ES:DX -> ???
Return: BX destroyed
Note:   ES:DX is stored internally if the variable is currently 0000h:0000h,
          but ignored if already set; a counter is incremented
SeeAlso: AX=C000h"PCACHE",AX=C00Fh"PCACHE"
--------V-2FC00F-----------------------------
INT 2F - AD-DOS - GET PASSWORD STATUS
        AX = C00Fh
Return: BX = current state (0000h disabled, 0001h enabled)
SeeAlso: AX=C00Eh"AD-DOS"
Index:  screen saver;AD-DOS
--------c-2FC00F-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - REMOVE ???
        AX = C00Fh
Return: BX destroyed
Note:   this function decrements the counter used by AX=C00Eh, and clears the
          internal pointer variable to 0000h:0000h when it reaches zero
SeeAlso: AX=C000h"PCACHE",AX=C00Eh"PCACHE"
--------c-2FC010-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - GET ???
        AX = C010h
        CX = index of ??? table (00h-02h, others treated as 00h)
        SI = offset into data table
Return: AL = byte at specified offset into table
        BX destroyed
SeeAlso: AX=C000h"PCACHE"
--------c-2FC011-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - GET ???
        AX = C011h
Return: AX = ??? (0007h)
        BX = ??? (0001h)
        CH = ???
        CL = ???
SeeAlso: AX=C000h"PCACHE"
--------c-2FC012-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - GET ???
        AX = C012h
Return: AX = ???
        BX = ???
        CX = ???
        DX = ???
SeeAlso: AX=C000h"PCACHE"
--------c-2FC013-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - ???
        AX = C013h
        ???
Return: BX destroyed
        ???
Program: PCACHE is the resident print spooler portion of PrintCache by
          LaserTools; it may use either memory or disk space to spool output
Range:  AH=C0h to AH=FFh, selected by commandline switch
SeeAlso: AX=C000h"PCACHE"
--------c-2FC014-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - ???
        AX = C014h
        ???
Return: BX destroyed
        ???
SeeAlso: AX=C000h"PCACHE"
--------c-2FC015-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - ???
        AX = C015h
        ???
Return: BX destroyed
        ???
SeeAlso: AX=C000h"PCACHE"
--------c-2FC016-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - INCREMENT ???
        AX = C016h
Return: BX destroyed
SeeAlso: AX=C000h"PCACHE",AX=C017h"PCACHE"
--------c-2FC017-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - DECREMENT ???
        AX = C017h
Return: BX destroyed
SeeAlso: AX=C000h"PCACHE",AX=C016h"PCACH"
--------c-2FC018-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - ???
        AX = C018h
        ???
Return: BX destroyed
        ???
Note:   the first instruction of this function is an indirect jump which points
          at a RET by default
SeeAlso: AX=C000h"PCACHE",AX=C019h"PCACHE"
--------c-2FC019-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - ???
        AX = C019h
        ???
Return: BX destroyed
        ???
Note:   the first instruction of this function is an indirect jump which points
          at a RET by default
SeeAlso: AX=C000h"PCACHE",AX=C018h"PCACHE"
--------c-2FC01A-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - CLEAR ??? FLAG
        AX = C01Ah
Return: BX destroyed
SeeAlso: AX=C000h"PCACHE",AX=C01Bh"PCACHE"
--------c-2FC01B-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - SET ??? FLAG
        AX = C01Bh
Return: BX destroyed
SeeAlso: AX=C000h"PCACHE",AX=C01Ah"PCACHE"
--------c-2FC01C-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - ???
        AX = C01Ch
        ???
Return: AX = ???
        BX destroyed
SeeAlso: AX=C000h"PCACHE"
--------c-2FC01D-----------------------------
INT 2F U - PrintCache v3.1 PCACHE.EXE - NOP
        AX = C01Dh to C01Fh
Return: BX destroyed
Program: PCACHE is the resident print spooler portion of PrintCache by
          LaserTools; it may use either memory or disk space to spool output
Range:  AH=C0h to AH=FFh, selected by commandline switch
SeeAlso: AX=C000h"PCACHE"
--------V-2FC020-----------------------------
INT 2F - AD-DOS - GET AND RESET VxD API STATUS
        AX = C020h
Return: AL = 00h if successful
            BX = VxD API Status
                0000h no error
                0001h error
                0100h neither Windows 3.X enhanced mode nor Windows/386 2.x
                          is running
                0200h VM API entry point not found (VxD not installed)
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
Note:   this call resets the VxD API Status to zero
SeeAlso: AX=1602h,AX=1607h"CALL OUT API"
Index:  screen saver;AD-DOS
--------V-2FC04E-----------------------------
INT 2F - Explosiv v2.00+ - NON-TSR EXECUTING CHECK
        AX = C04Eh
Return: AL = 4Fh if Explosiv is running but not memory-resident
Program: Explosiv is a shareware animated screen blanker for DOS and Windows 3
          by H&G Software (Reidar Gresseth and Chris Hook)
Range:  AH=C0h to AH=C9h, selected by configuration
SeeAlso: AX=C050h
Index:  screen saver;Explosiv
--------V-2FC050-----------------------------
INT 2F - Explosiv v2.00+ - INSTALLATION CHECK
        AX = C050h
Return: AL = 51h if installed
        ---v3.0+ ---
            BX = interval in clock ticks
            CH = animation display color (00h mono, 01h tinge, 02h color)
            CL = animation delay factor
            DH = animation parameters
            DL = INT 10 checking (00h on, 01h off)
            SI = number of bytes available for animation code
            DI = display type (00h VGA, 01h EGA, 02h CGA, 03h HGC, 04h MDA)
Program: Explosiv is a shareware animated screen blanker for DOS and Windows 3
          by H&G Software (Reidar Gresseth and Chris Hook)
Range:  AH=C0h to AH=C9h, selected by configuration
SeeAlso: AH=93h,AX=C000h"AD-DOS",AX=C04Eh,AX=C052h,AX=C054h"v3"
SeeAlso: INT 14/AX=AA01h
Index:  screen saver;Explosiv
--------V-2FC052-----------------------------
INT 2F - Explosiv v2.00+ - UNINSTALL
        AX = C052h
        DX:BX = address to return to on successful uninstall
Return: at specified address if successful
        AL = 53h on error
Note:   specified return address must have the segment of the caller's PSP
SeeAlso: AX=C050h
Index:  screen saver;Explosiv
--------V-2FC054-----------------------------
INT 2F - Explosiv v2.x - GET ANIMATION DELAY FACTOR
        AX = C054h
Return: AL = delay factor
SeeAlso: AX=C057h
Index:  screen saver;Explosiv
--------V-2FC054-----------------------------
INT 2F - Explosiv v3.0+ - UPDATE PARAMETERS
        AX = C054h
        BX = new interval in clock ticks
        CH = animation display color (00h mono, 01h tinge, 02h color)
        CL = animation delay factor
        DH = animation parameters
        DL = INT 10 checking (00h on, 01h off)
SeeAlso: AX=C050h
Index:  screen saver;Explosiv
--------V-2FC055-----------------------------
INT 2F - Explosiv v2.x - SET BLANKING INTERVAL
        AX = C055h
        BX = new interval in clock ticks
Index:  screen saver;Explosiv
--------V-2FC056-----------------------------
INT 2F - Explosiv v2.x - SET ANIMATION DISPLAY TYPE
        AX = C056h
        BL = animated display type (00h mono, 01h color)
SeeAlso: AX=C058h"v2.x"
Index:  screen saver;Explosiv
--------V-2FC056-----------------------------
INT 2F - Explosiv v3.0+ - ENABLE/DISABLE EXPLOSIV
        AX = C056h
        BX = new state
            0000h disabled
            0100h enabled
            0101h enabled, but never blank
            0102h enabled, always blank
--------V-2FC057-----------------------------
INT 2F - Explosiv v2.x - SET ANIMATION DELAY FACTOR
        AX = C057h
        BL = delay factor
SeeAlso: AX=C054h"v2.x"
Index:  screen saver;Explosiv
--------V-2FC058-----------------------------
INT 2F - Explosiv v2.x - SET ANIMATION PARAMETER
        AX = C058h
        BL = animation parameter
Note:   the animation parameter has different interpretations for each display
SeeAlso: AX=C056h"v2.x"
Index:  screen saver;Explosiv
--------V-2FC058-----------------------------
INT 2F - Explosiv v3.0+ - LOAD NEW ANIMATION DISPLAY CODE
        AX = C058h
        BX = file handle for file containing display code
        CX = number of bytes to load
        DX = offset at which animation code should be loaded
Return: AL = status (see #03033)
Note:   if AL=00h-03h on return, the file will be closed
Index:  screen saver;Explosiv

(Table 03033)
Values for Explosiv function status:
 00h    successful
 01h    code too large to available space
 02h    no data read, load aborted
 03h    incomplete load, default blanking display loaded instead
 58h    unexpected offset in DX
--------V-2FC059-----------------------------
INT 2F - Explosiv v2.x - DISABLE EXPLOSIV
        AX = C059h
Note:   clears flag set by AX=C05Ah
SeeAlso: AX=C05Ah
Index:  screen saver;Explosiv
--------V-2FC05A-----------------------------
INT 2F u - Explosiv v2.x - ENABLE EXPLOSIV
        AX = C05Ah
        BL = ???
Note:   sets flag cleared by AX=C059h then stores BL
SeeAlso: AX=C059h,AX=C05Bh
Index:  screen saver;Explosiv
--------V-2FC05B-----------------------------
INT 2F - Explosiv v2.x - CHANGE ANIMATION DISPLAY
        AX = C05Bh
        BL = animation display
Note:   this function fails silently if the requested display is not in memory
SeeAlso: AX=C05Ah,AX=C05Ch
Index:  screen saver;Explosiv
--------V-2FC05C-----------------------------
INT 2F - Explosiv v2.x - SET INT 10 CHECKING
        AX = C05Ch
        BL = new state of INT 10 checking (00h enabled, 01h disabled)
SeeAlso: AX=C05Bh
Index:  screen saver;Explosiv
--------v-2FC080-----------------------------
INT 2F U - AMI IAM.SYS - INSTALL ??? CALLBACK
        AX = C080h
        CX:DX -> ??? callback
        DI = segment of ??? buffer (first WORD copied into IAM.SYS)
Program: IAM.SYS is the Illegal Activity Monitor portion of American
          Megatrends, Inc.'s PC-Defender anti-virus product
Note:   also sets ??? flag
SeeAlso: AX=C081h

Format of IAM.SYS buffer:
Offset  Size    Description     (Table 03034)
 00h    BYTE    ???
 01h    BYTE    ???
 02h  N BYTEs   ??? (ASCIZ strings)
--------v-2FC081-----------------------------
INT 2F U - AMI IAM.SYS - CLEAR ???
        AX = C081h
Desc:   clears the ??? flag that AX=C080h sets
SeeAlso: AX=C080h
--------K-2FC0AE-----------------------------
INT 2F U - HP 100LX/200LX - PUSHKEYS - INSTALLATION CHECK
        AX = C0AEh
Return: AX = 4453h if installed
        CX = 5259h if installed
Range:  AH=C0h to AH=FFh, selected by scanning for signature
SeeAlso: AX=C000h"HP 100LX",AX=C001h"HP 100LX",AX=C0AFh"HP 100LX"
--------K-2FC0AF-----------------------------
INT 2F U - HP 100LX/200LX - PUSHKEYS - INTERNAL - GET BUFFER ADDRESS
        AX = C0AFh
Return: ES:DI -> buffer (behind code)
Range:  AH=C0h to AH=FFh, selected by scanning for signature with AL=AEh
SeeAlso: AX=C000h"HP 100LX",AX=C001h"HP 100LX",AX=C0AEh"HP 100LX"
--------N-2FC100-----------------------------
INT 2F U - Personal NetWare - STPIPX v1.00 - INSTALLATION CHECK
        AX = C100h
Return: AL = FFh if installed
            ES:SI -> signature string "STP-IPX$"
            BX = version??? (0001h for v1.00)
            DI corrupted
Note:   AH=C1h is the default value; STPIPX probably scans a range of
          multiplex numbers to find a free one, as LSL does
SeeAlso: AX=C000h"LSL",AX=C101h
--------N-2FC101-----------------------------
INT 2F U - Personal NetWare - STPIPX v1.00 - UNINSTALL
        AX = C101h
Return: AL = status???
        BX corrupted
SeeAlso: AX=C101h
--------N-2FC205-----------------------------
INT 2F U - LapLink RemoteAccess (LLRA) - Redirector - ???
        AX = C205h
        details not yet available
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
SeeAlso: AX=C000h"LapLink",AX=C002h"LapLink",AX=C2F0h"LapLink"
SeeAlso: AX=C2F1h"LapLink",AX=C301h"LapLink"
--------N-2FC2F0-----------------------------
INT 2F U - LapLink RemoteAccess (LLRA) - Redirector - ???
        AX = C2F0h
        details not yet available
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
SeeAlso: AX=C000h"LapLink",AX=C002h"LapLink",AX=C205h"LapLink"
SeeAlso: AX=C2F1h"LapLink",AX=C301h"LapLink"
--------N-2FC2F1-----------------------------
INT 2F U - LapLink RemoteAccess (LLRA) - Redirector - ???
        AX = C2F1h
        details not yet available
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
SeeAlso: AX=C000h"LapLink",AX=C002h"LapLink",AX=C205h"LapLink"
SeeAlso: AX=C2F0h"LapLink",AX=C301h"LapLink"
--------d-2FC300-----------------------------
INT 2F - SETWPR.COM - INSTALLATION CHECK
        AX = C300h
Return: AL = FFh if installed
Program: SETWPR is a hard-disk write-protection TSR by Jaroslaw Rafa
SeeAlso: AX=C302h"SETWPR"
--------k-2FC300DX0000-----------------------
INT 2F U - SpaceManager - INSTALLATION CHECK
        AX = C300h
        DX = 0000h
Return: AL = FFh if any SpaceManager programs installed
            BX = 6F73h
            CX = 6F68h
Program: SpaceManager is an enhancement for MS-DOS DoubleSpace by Vertisoft
          Systems, Inc.
Range:  AH=C3h to AH=FFh, selected by scanning for first free multiplex number
SeeAlso: AX=C300h/BX=4F53h
--------k-2FC300BX4F53-----------------------
INT 2F U - SpaceManager - INSTALLATION VERIFICATION
        AX = C300h
        BX = 4F53h ('OS')
        CX = 4F48h ('OH')
        DX = program identifier (see #03035) or 0666h for any SpaceManager prog
Return: AL = FFh if BX/CX as specified and specified program installed
            BX = 6F73h ('os')
            CX = 6F68h ('oh')
Range:  AH=C3h to AH=FFh, selected by scanning for first free multiplex number
Note:   this call is chained if BX,CX, or DX are not as specified above
SeeAlso: AX=C300h/DX=0000h

(Table 03035)
Values for SpaceManager program identifier:
 9000h  SMOUNT (SuperMount)
 9001h  SELECTC (SelectCompress)
 9002h  SUPERX (SuperExchange)
 9003h  FORTUNE (FortuneTeller)
--------k-2FC301-----------------------------
INT 2F U - SpaceManager - ???
        AX = C301h
        DX = program identifier (9000h,9001h,9003h) (see #03035)
        ???
Return: ???
--------N-2FC301-----------------------------
INT 2F U - LapLink RemoteAccess (LLRA) - Compression - ???
        AX = C301h
        details not yet available
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
SeeAlso: AX=C000h"LapLink",AX=C002h"LapLink",AX=C205h"LapLink"
SeeAlso: AX=C2F0h"LapLink",AX=C3F0h"LapLink",AX=C3F1h"LapLink"
--------k-2FC302-----------------------------
INT 2F U - SpaceManager - ENABLE PROGRAM
        AX = C302h
        DX = program identifier (9000h,9001h,9003h) (see #03035)
Return: AX destroyed
SeeAlso: AX=C303h,AX=C306h
--------d-2FC302-----------------------------
INT 2F - SETWPR.COM - SET WRITE-PROTECTION STATE
        AX = C302h
        BL = new state
            00h disk may be written
            01h disk write-protected
Return: AL = FFh if installed
Program: SETWPR is a hard-disk write-protection TSR by Jaroslaw Rafa
SeeAlso: AX=C300h"SETWPR"
--------k-2FC303-----------------------------
INT 2F U - SpaceManager - DISABLE PROGRAM
        AX = C303h
        DX = program identifier (9000h,9001h,9003h) (see #03035)
Return: AX destroyed
SeeAlso: AX=C302h,AX=C306h
--------k-2FC304-----------------------------
INT 2F U - SpaceManager - GET PER-DRIVE ENABLEMENT TABLE
        AX = C304h
        DX = program identifier (9000h,9001h,9003h) (see #03035)
Return: ES:BX -> 26-byte drive table (00h disabled for drive, 01h enabled)
        AX destroyed
--------k-2FC305DX9003-----------------------
INT 2F U - SpaceManager - FORTUNE.EXE - NOP
        AX = C305h
        DX = 9003h
Return: AX destroyed
--------k-2FC305-----------------------------
INT 2F U - SpaceManager - ???
        AX = C305h
        DX = program identifier (9000h,9001h) (see #03035)
        ???
Return: ???
--------k-2FC306-----------------------------
INT 2F U - SpaceManager - CHECK WHETHER PROGRAM ENABLED
        AX = C306h
        DX = program identifier (9000h,9001h,9003h) (see #03035)
Return: AL = current state (00h disabled, FAh enabled)
        AH destroyed
SeeAlso: AX=C302h,AX=C303h
--------k-2FC307DX9001-----------------------
INT 2F U - SpaceManager - SELECTC - ???
        AX = C307h
        DX = 9001h
        BX = ???
        CX = ???
        ???
Return: ???
--------k-2FC308DX9001-----------------------
INT 2F U - SpaceManager - SELECTC - ???
        AX = C308h
        DX = 9001h
        ???
Return: ???
--------N-2FC3F0-----------------------------
INT 2F U - LapLink RemoteAccess (LLRA) - Compression - ???
        AX = C3F0h
        details not yet available
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
SeeAlso: AX=C000h"LapLink",AX=C002h"LapLink",AX=C205h"LapLink"
SeeAlso: AX=C2F0h"LapLink",AX=C301h"LapLink",AX=C3F1h"LapLink"
--------N-2FC3F1-----------------------------
INT 2F U - LapLink RemoteAccess (LLRA) - Compression - ???
        AX = C3F1h
        details not yet available
Range:  AH=C0h to AH=FFh, selected by scanning for first free multiplex number
SeeAlso: AX=C000h"LapLink",AX=C002h"LapLink",AX=C205h"LapLink"
SeeAlso: AX=C2F0h"LapLink",AX=C301h"LapLink",AX=C3F0h"LapLink"
--------N-2FC500-----------------------------
INT 2F - PC-DOS Econet v1.05 - INSTALLATION CHECK
        AX = C500h
Return: AL = status
            00h not installed, OK to install
            01h not installed, can't install
            FFh installed
Note:   the interrupt-enable state will be preserved, but interrupts may be
          enabled during processing of this function
SeeAlso: AX=C501h,AX=C508h
--------N-2FC501-----------------------------
INT 2F - PC-DOS Econet v1.05 - RESET BOARD AND DRIVER
        AX = C501h
Return: AX = return code (see #03037)
Desc:   reset both the network board and the driver software
Notes:  use this function with caution, as it will affect any other resident
          software using the network board
        the interrupt-enable state will be preserved, but interrupts may be
          enabled during processing of this function
SeeAlso: AX=C500h
--------N-2FC502-----------------------------
INT 2F - PC-DOS Econet v1.05 - PERFORM NETWORK OPERATION
        AX = C502h
        DS:DX -> control block (see #03036)
Return: AX = return code (see #03037) (same as returned in control block)
Note:   the interrupt-enable state will be preserved, but interrupts may be
          enabled during processing of this function
SeeAlso: AX=C500h

Format of Econet control block:
Offset  Size    Description     (Table 03036)
 00h    DWORD   -> command block (see #03038)
 04h    WORD    length of transmit data block
 06h    DWORD   -> transmit data block
 0Ah    WORD    length of reply block (set to 0000h prior to call)
 0Ch    DWORD   -> reply block
 10h    WORD    return code (set to 0000h prior to call) (see #03037)
 12h    DWORD   reserved for Econet use

(Table 03037)
Values for Econet return code:
 0000h  successful
 0001h  bad command in command block
 0002h  no handles left
 0003h  bad handle
 0004h  bad argument in command
 0005h  buffer too small
 0006h  kill condition failed
 0007h  control block in use
 007Fh  command aborted
 01xxh  retryable board error XXh
 02xxh  fatal board error XXh
 0300h  invalid subfunction number in AL
 0301h  timeout
 03xxh  other driver errors
SeeAlso: #03036

Format of Econet command block:
Offset  Size    Description     (Table 03038)
 00h    BYTE    command code (see #03039)
---command 00h---
 01h    BYTE    direction (00h = read initialization data, 01h = set init data)
 02h    WORD    "TxCB" transmit control block size
 04h    WORD    "RxCB" receive control block size
                Notes:  TxCB and RxCB are always the same size in v1.05,
                          permitting any CB to be used for either receive
                          or transmit
                        this command should not be used by applications to
                          set the buffer sizes
 06h  6 BYTEs   padding (0)
---command 01h---
 01h    BYTE    port number (00h = receive on all ports)
                if the RxCB is opened for RPC, the port number indicates the
                  allowable RPC (see #03040)
 02h    WORD    station number (FEFFh = broadcast)
 04h    BYTE    RPC flags
                bit 7: CB is open for RPCs only
                bit 6: restrict to RPC number given in next field
 05h    WORD    RPC number
 07h    BYTE    timeout in 1/2-second units (00h = never)
                if a timeout occurs, the RxCB can still receive data, and may
                  generate another event after the timeout unless it is
                  explicitly killed
 08h  4 BYTEs   padding (0)
---command 02h---
 01h    BYTE    control byte
 02h    BYTE    port number
 03h    WORD    station number
 05h    BYTE    number of retries
 06h    WORD    length of data to be sent (bits 14-0), 0000h allowed
                if bit 15 is set, no data will be transferred, but this field
                  will be updated (needed for peeking)
 08h    DWORD   -> destination address on remote machine
---command 03h---
 01h    BYTE    Control Block Handle
                FEh first filled-in RxCB
                FFh first TxCB which has been sent
 02h 10 BYTEs   padding (0)
---command 04h---
 01h    BYTE    Control Block Handle
 02h    BYTE    kill condition
                00h always
                01h kill only if bit7 of control byte is clear
                81h kill only if bit7 of control byte is set
 03h  9 BYTEs   padding (0)
                Notes:  control blocks are not freed until explicitly killed
                        because all TxCBs for a given destination are stored
                          on a separate subchain, it is necessary to kill all
                          failed TxCBs to a given destination before any new
                          ones are opened to that destination
---command 06h---
 01h    BYTE    Control Block Handle
 02h    WORD    starting byte within CB to read
 04h    WORD    number of bytes
                if 0000h or greater than remaining bytes in CB, return all
                  bytes from starting byte to end of CB
 06h  6 BYTEs   padding (0)
---command 07h---
 01h    BYTE    subfunction
                00h-0Fh get/set M/C type (bit N=1 indicates to set byte N)
                        four data bytes
                10h get station number
                11h set station number
                12h get Tx pause in 5ms units (default 20)
                13h set Tx pause
                14h get software version numbers
                16h get event enable mask
                17h set event enable mask
                18h get number of non-volatile bytes available
                80h+2N get non-volatile byte N
                81h+2N set non-volatile byte N
 02h    var     new data
Note:   all command blocks should be padded to twelve bytes with zeros if
          needed
SeeAlso: #03036

(Table 03039)
Values for Econet command code:
 00h    initialize
 01h    open receive
 02h    open transmit
 03h    poll
 04h    kill
 06h    read
 07h    get/set system parameters
SeeAlso: #03038

(Table 03040)
Values for Econet RPC type:
 00h    all
 81h    peek
 82h    poke
 83h    remote JSR
 84h    remote procedure call
 85h    OS procedure
 86h    Halt
 87h    Continue
SeeAlso: #03038

Format of Econet Reply Block (command 00h):
Offset  Size    Description     (Table 03041)
 00h    WORD    TxCB size (default is 0500h, the maximum Econet packet length)
 02h    WORD    RxCB size
 04h    BYTE    number of TxCBs allocated       
 05h    BYTE    number of RxCBs allocated       
SeeAlso: #03036,#03042,#03044

Format of Econet Reply Block (commands 01h,02h):
Offset  Size    Description     (Table 03042)
 00h    BYTE    control block handle
SeeAlso: #03036,#03041,#03045

Format of Econet Reply Block (command 03h):
Offset  Size    Description     (Table 03043)
 00h    BYTE    CB number (when wildcard specified for poll)
 01h    BYTE    control
                (RxCB) 00h until received, then Sent Control byte
                (TxCB) transmit status
                    bit 7: transmission pending
                    bit 6: transmission failed
                    bits 3-0: error number
 02h    BYTE    Port number
 03h    WORD    station number
 05h    WORD    length
 07h    WORD    0000h
SeeAlso: #03036,#03041,#03044

Format of Econet Reply Block (command 06h):
Offset  Size    Description     (Table 03044)
 00h  N BYTEs   data read from network
SeeAlso: #03036,#03043,#03045

Format of Econet Reply Block (command 07h):
Offset  Size    Description     (Table 03045)
 00h  N BYTEs   returned information
SeeAlso: #03036,#03044
--------N-2FC503-----------------------------
INT 2F - PC-DOS Econet v1.05 - ADD EVENT HANDLER
        AX = C503h
        DS:DX -> event handler (see #03046)
Return: AX = return code (see #03037)
Note:   the interrupt-enable state will be preserved, but interrupts may be
          enabled during processing of this function
SeeAlso: AX=C500h,AX=C504h,AX=C505h,AX=C508h

Format of Econet event handler:
Offset  Size    Description     (Table 03046)
 00h    DWORD   -> next handler's code (at offset 8, filled in by Econet)
 04h    DWORD   -> previous event handler (filled in by Econet)
 08h    var     entry point (executable code called on event) (see #03047)

(Table 03047)
Values Econet event handler is called with:
        AL = event number
        AH = timeout flag (01h if timeout, else 00h)
Return: all registers preserved
        if event trapped by this handler, issue RETF
        if event not trapped, jump to address stored at offset 0
SeeAlso: #03046
--------N-2FC504-----------------------------
INT 2F - PC-DOS Econet v1.05 - REMOVE EVENT HANDLER
        AX = C504h
        DS:DX -> event handler
Return: AX = return code (see #03037)
Note:   the interrupt-enable state will be preserved, but interrupts may be
          enabled during processing of this function
SeeAlso: AX=C500h,AX=C503h,AX=C506h,AX=C508h
--------N-2FC505-----------------------------
INT 2F - PC-DOS Econet v1.05 - SET DEFAULT EVENT ACTION
        AX = C505h
        DL = new default action
            00h disable event handling (ignore incoming events)
            01h enable (call event handler chain)
            02h store until enabled or disabled (default)
Return: AX = return code (see #03037)
Note:   the interrupt-enable state will be preserved, but interrupts may be
          enabled during processing of this function
SeeAlso: AX=C500h,AX=C503h,AX=C506h,AX=C508h
--------N-2FC506-----------------------------
INT 2F - PC-DOS Econet v1.05 - SET INDIVIDUAL EVENT ACTION
        AX = C506h
        DH = event number
        DL = new default action
            00h disable event handling (ignore incoming events)
            01h enable (call event handler chain)
            02h store until enabled or disabled (default)
Return: AX = return code (see #03037)
Note:   the interrupt-enable state will be preserved, but interrupts may be
          enabled during processing of this function
SeeAlso: AX=C500h,AX=C504h,AX=C505h,AX=C507h
--------N-2FC507-----------------------------
INT 2F - PC-DOS Econet v1.05 - TEST/CLEAR EVENT STATUS
        AX = C507h
        DH = event number (FFh = first event in queue)
        DL = disposition (00h test only, 01h test and clear)
Return: AX = return code (see #03037)
        DH = event number if one is pending, 00h if none
Note:   the interrupt-enable state will be preserved, but interrupts may be
          enabled during processing of this function
SeeAlso: AX=C500h,AX=C503h,AX=C506h,AX=C508h
--------N-2FC508-----------------------------
INT 2F - PC-DOS Econet v1.05 - ENABLE/DISABLE EVENT SCHEDULER
        AX = C508h
        DL = new state of scheduler (01h enabled, 02h disabled)
Return: AX = return code (see #03037)
        DL = previous state
Notes:  the interrupt-enable state will be preserved, but interrupts may be
          enabled during processing of this function
        while the scheduler is disabled, all events are queued until the
          scheduler is re-enabled
SeeAlso: AX=C500h,AX=C503h,AX=C504h,AX=C506h,AX=C507h
--------d-2FC64CBX5553-----------------------
INT 2F U - Smart Prompt - INSTALLATION CHECK
        AX = C64Ch
        BX = 5553h
Return: AX = 4CC6h if installed
        BX = 5355h if installed
Program: Smart Prompt (SMARTPMT) is a freeware TSR by Steve Gibson which
          forces an immediate flush of SmartDrive's (and compatible caches')
          buffers on returning to the DOS prompt
--------V-2FC700CX434C-----------------------
INT 2F u - COLAP - INSTALLATION CHECK
        AX = C700h
        CX = 434Ch  "CL"
Return: AL = FFh if installed
Program: colap.com is a freeware TSR by Eric Meyer which controls contrast
          and brightness of color laptops by changing the VGA palette colors;
          for Toshiba laptops there are more hotkeys for shutting off display
          and harddisk.
--------v-2FC900BP0000-----------------------
INT 2F U - ThunderByte??? - INSTALLATION CHECK
        AX = C900h
        BP = 0000h
Return: AL = FFh if installed
            BP >= 0014h
Note:   called by TBSCANX
SeeAlso: AX=C987h,AX=CA00h
--------v-2FC987-----------------------------
INT 2F U - ThunderByte??? - DISINFECT FILE???
        AX = C987h
        BX:DX -> filename
        BX:CX -> virus name
Return: AX = status
            0000h successful???
Note:   called by TBSCANX
SeeAlso: AX=CA00h
--------v-2FC9FD-----------------------------
INT 2F - ThunderByte TBLOG - WRITE STRING TO LOG
        AX = C9FDh
        DS:SI -> ASCIZ string (max 110 chars)
Return: AH = 00h
        AL = last character in string
        CX = number of unused characters in string
        SI,DI destroyed
Notes:  The string can also be terminated with a '%'-character.
        This function is never called within ThunderBYTE Anti-Virus.
SeeAlso: AX=C900h
--------r-2FC9FF-----------------------------
INT 2F C - StackMan - INSTALLATION BROADCAST
        AX = C9FFh
        BL = BCD version number
        CX = number of stacks
        DX = stack size in bytes
Program: StackMan is a freeware stack manager by Franz Veldman of ESaSS B.V.
          which functions as a replacement for the DOS STACK= command as well
          as permitting multiple TSRs to share a pool of stack space
InstallCheck:   test for the string "STACKXXX" at offset 0Ah from the INT B4
          handler
Note:   called by StackMan when it goes resident to inform interested TSRs that
          its API is available
SeeAlso: INT B4"StackMan",INT B5"StackMan"
Index:  installation check;STACKMAN|broadcasts;STACKMAN installation
--------F-2FCA-------------------------------
INT 2F - FAXPLUS - FAX TSR
        AH = CAh
        ???
Return: ???
Program: FAXTSR is a resident FAX send/receive module for FAXPLUS by Frans
          Veldman
SeeAlso: AH=2Ah"Gammafax"
--------v-2FCA00BX5442-----------------------
INT 2F - TBSCANX - INSTALLATION CHECK
        AX = CA00h
        BX = 5442h ('TB')
Return: AL = state
            00h not installed
            FFh installed
                BX = 7462h ('tb') if BX was 5442h on entry
Program: TBSCANX is a resident virus scanning module by Frans Veldman.
Notes:  programs may perform virus checks on themselves, other program files,
          or their data files by invoking the TBSCANX API.
        current versions of TBScanX don't actually check the value of BX
SeeAlso: AX=4653h/CX=0002h,AX=4653h/CX=0007h,AX=C900h
--------v-2FCA01-----------------------------
INT 2F - TBSCANX - GET STATUS
        AX = CA01h
Return: AH = BCD version number (v2.2+)
            CAh for versions before 2.2
        AL = state (00h = disabled, 01h = enabled)
        CX = number of signatures which will be searched
---v2.0---
        BX = EMS handle, 0000h if not using EMS
---v2.3+---
        BX = segment of swap area, 0000h if not swapped
        DX = EMS or XMS handle (XMS handle if BX=0000h), FFFFh if not using EMS
SeeAlso: AX=CA02h
--------v-2FCA02-----------------------------
INT 2F - TBSCANX - SET STATE
        AX = CA02h
        BL = new state (00h = disabled, 01h = enabled)
SeeAlso: AX=CA01h
--------v-2FCA03-----------------------------
INT 2F - TBSCANX - SCAN BUFFER
        AX = CA03h
        CX = size of buffer
        DS:DX -> buffer containing data to scan
Return: CF clear if no virus signatures found
            BX,ES destroyed
        CF set if signature found
            ES:BX -> ASCIZ virus name (v2.3+)
            DS:DX -> ASCIZ virus name (v2.0)
        AX,CX,DX destroyed (v2.3+)
        all other registers except CS:IP and SS:SP destroyed (v2.0)
SeeAlso: AX=CA04h
--------v-2FCA04-----------------------------
INT 2F - TBSCANX - SCAN FILE
        AX = CA04h
        DS:DX -> filename
Return: CF clear if no virus signatures found
            BX,SI,DI,ES destroyed
        CF set if signature found
            ES:BX -> ASCIZ virus name
        AX,CX,DX destroyed
Note:   this function requires at least 4K free memory
SeeAlso: AX=CA03h
--------U-2FCAFEBX0000-----------------------
INT 2F U - THELP v3.0 - INSTALLATION CHECK
        AX = CAFEh
        BX = 0000h
Return: BX = segment of resident code if installed
            0000h if not installed
SeeAlso: AX=5453h,INT 2D"AMIS"
--------F-2FCB00-----------------------------
INT 2F - Communicating Applications Specification - INSTALLATION CHECK
        AX = CB00h
Return: AL = status
            00h not installed, OK to install
            01h not installed, not OK to install
            FFh installed
Note:   AH = CBh is the default identifier, but may be reconfigured
SeeAlso: AH=2Ah,AX=8000h"FaxBIOS",AX=CB0Eh,AX=CBDCh
--------F-2FCB00BX4D53-----------------------
INT 2F - METZ XpressFax CASMGR - INSTALLATION CHECK
        AX = CB00h
        BX = 4D53h ('MS')
        CX = 4949h ('II')
Return: AL = status
            00h not installed, OK to install
            01h not installed, not OK to install
            FFh installed
                BX = 6D73h ('ms')
                CX = 6969h ('ii')
Note:   this function is equivalent to the standard CASMGR installation check,
          but uses the additional magic values to identify which CAS is
          installed
SeeAlso: AH=2Ah,AX=8000h"FaxBIOS",AX=C000h/BX=444Bh,AX=CB0Eh,AX=CB16h
--------F-2FCB01-----------------------------
INT 2F - Communicating Applications Specification - SUBMIT A TASK
        AX = CB01h
        DS:DX -> ASCIZ name of task control file
Return: AX >= 0: event handle
        AX < 0: two's complement of error code (see #03048)
Note:   files needed for an event must be kept until task is complete or error
SeeAlso: AX=CB0Bh,AX=CB15h

(Table 03048)
Values for CAS error code:
  (AH = class, AL = subcode, value passed back is 2's complement)
  Class 00h     --- FAX warnings
        Subcode 00h     no error
                02h     bad scanline count
                03h     page sent with errors, could not retransmit
                04h     received data lost
                05h     invalid or missing logo file
                06h     filename does not match nonstandard format (NSF) header
                07h     file size does not match NSF header
  Class 01h     --- DOS warnings (data was sent)
        Subcode 01h     invalid function
                05h     access denied
                06h     invalid handle
                others  see #01680 at INT 21/AH=59h/BX=0000h
  Class 02h     --- fatal errors (data not sent)
        Subcode 00h     multiplex handler failed
                01h     unknown command
                02h     bad event handle
                03h     FIND NEXT attempted before FIND FIRST
                04h     no more events
                07h     invalid queue type
                08h     bad control file
                09h     communication board busy
                0Ah     invalid command parameter
                0Bh     can't uninstall resident code
                0Ch     file exists
                80h     unknown task type
                81h     bad phone number
                82h     bad .PCX file header
                83h     unexpected EOF
                84h     unexpected disconnect
                85h     too many dialing retries
                86h     no file specified for send
                87h     communication board timeout
                88h     received too many pages (>1023) of data
                89h     manual connect initiated too long ago
                8Ah     hardware command set error
                8Bh     bad NonStandard Format (NSF) header file
  Class 03h     --- fatal DOS errors
        Subcode 02h     file not found
                03h     path not found
                others  see #01680 at INT 21/AH=59h/BX=0000h
  Class 04h     --- FAX errors
        Subcode 01h     remote unit not Group 3 compatible
                02h     remote unit did not send capabilities
                03h     other FAX machine incompatible
                04h     other FAX incapable of file transfers
                05h     exceeded retrain or FAX resend limit
                06h     line noise or failure to agree on bit rate
                07h     remote disconnected after receiving data
                08h     no response from remote after sending data
                09h     remote's capabilities incompatible
                0Ah     no dial tone (v1.2+)
                0Bh     invalid response from remote unit after sending data
                0Dh     phone line dead or remote unit disconnected
                0Eh     timeout while waiting for secondary dial tone (v1.2+)
                11h     invalid command from remote after receiving data
                15h     tried to receive from incompatible hardware
                5Ch     received data overflowed input buffer
                5Dh     remote unexpectedly stopped sending data
                5Eh     other FAX machine jammed (no data sent)
                5Fh     remote took too long to send fax scan line
                63h     can't get through to remote unit
                64h     user canceled event
  Class 05h     --- application-specific (v1.2+)
  ---Intel FAXPOP.EXE
        Subcode 00h     tried to send while in graphics mode
                01h     insufficient disk space
                02h     internal buffer overflow
  Class 06h     --- CAS implementation-specific (v1.2+)
--------F-2FCB02-----------------------------
INT 2F - Communicating Applications Specification - ABORT CURRENT EVENT
        AX = CB02h
Return: AX >= 0: event handle of aborted event
        AX < 0: error code (see #03048)
Note:   termination could take up to 30 seconds
SeeAlso: AX=CB08h,AX=CB10h
--------F-2FCB05-----------------------------
INT 2F - Communicating Applications Specification - FIND FIRST QUEUE ENTRY
        AX = CB05h
        CX = status of events to find
            0000h successful completion
            0001h waiting to be processed
            0002h number has been dialed
            0003h connection established, sending
            0004h connection established, receiving
            0005h event aborted
            FFFFh find any event, regardless of status
            other negative values, match error code
        DH = direction
            00h chronological order, earliest to latest
            01h reverse chronological order, latest to earliest
        DL = queue to search
            00h task queue
            01h receive queue
            02h log queue
Return: AX = 0000h successful
            BX = event handle for found event
        AX < 0     error code (see #03048)
SeeAlso: AX=CB06h,AX=CB07h
--------F-2FCB06-----------------------------
INT 2F - Communicating Applications Specification - FIND NEXT QUEUE ENTRY
        AX = CB06h
        DL = queue to search
            00h task queue
            01h receive queue
            02h log queue
Return: AX = 0000h successful
            BX = event handle for found event
        AX < 0     error code (see #03048)
Note:   direction of search is same as preceding FIND FIRST call
SeeAlso: AX=CB05h
--------F-2FCB07-----------------------------
INT 2F - Communicating Applications Specification - OPEN FILE
        AX = CB07h
        BX = event handle from find (AL=05h,06h) or submit task (AL=01h)
        CX = receive file number (ignored for task queue and log queue)
            0000h  open receive control file
            N      open Nth received data file
        DL = queue
            00h task queue
            01h receive queue control file or received file, as given by CX
            02h log queue
            03h group file in task queue (v1.2+)
            04h group file in log queue (v1.2+)
Return: AX = 0000h successful
            BX = DOS file handle for requested file
        AX < 0     error code (see #03048)
Note:   the returned file handle has been opened in read-only mode and should
          be closed with INT 21/AH=3Eh after use
SeeAlso: AX=CB01h,AX=CB05h,AX=CB14h
--------F-2FCB08-----------------------------
INT 2F - Communicating Applications Specification - DELETE FILE
        AX = CB08h
        BX = event handle
        CX = receive file number
            0000h delete ALL received files and receive control file
            N     delete Nth received file
        DL = queue
            00h delete control file in task queue and corresponding group file
                  if it exists
            01h delete file in receive queue, as given by CX
            02h delete control file in log queue (individual deletions not
                  recommended, to maintain integrity of log) and corresponding
                  group file if it exists
Return: AX = 0000h successful
        AX < 0     error code (see #03048)
SeeAlso: AX=CB02h,AX=CB09h
--------F-2FCB09-----------------------------
INT 2F - Communicating Applications Specification - DELETE ALL FILES IN Q
        AX = CB09h
        DL = queue
            00h delete all control files in task queue, including all group
                  files
            01h delete all files in receive queue
            02h delete all control files in log queue, including all group
                  files
Return: AX = 0000h successful
        AX < 0     error code (see #03048)
SeeAlso: AX=CB08h
--------F-2FCB0A-----------------------------
INT 2F - Communicating Applications Specification - GET EVENT DATE
        AX = CB0Ah
        BX = event handle
        DL = queue
            00h task queue
            01h receive queue
            02h log queue
Return: AX = 0000h successful
            CX = year
            DH = month
            DL = day
        AX < 0     error code (see #03048)
SeeAlso: AX=CB0Bh,AX=CB0Ch
--------F-2FCB0B-----------------------------
INT 2F - Communicating Applications Specification - SET TASK DATE
        AX = CB0Bh
        BX = event handle (task event only)
        CX = year
        DH = month
        DL = day
Return: AX = 0000h successful
        AX < 0     error code (see #03048)
Note:   setting a task's date and time to before the current date and time
          causes it to execute immediately
SeeAlso: AX=CB01h,AX=CB0Ah,AX=CB0Dh
--------F-2FCB0C-----------------------------
INT 2F - Communicating Applications Specification - GET EVENT TIME
        AX = CB0Ch
        BX = event handle
        DL = queue
            00h task queue
            01h receive queue
            02h log queue
Return: AX = 0000h successful
            CH = hour
            CL = minute
            DH = second
            DL = 00h
        AX < 0     error code (see #03048)
SeeAlso: AX=CB0Ah,AX=CB0Dh
--------F-2FCB0D-----------------------------
INT 2F - Communicating Applications Specification - SET TASK TIME
        AX = CB0Dh
        BX = event handle (task events only)
        CH = hour
        CL = minute
        DH = second
        DL unused
Return: AX = 0000h successful
        AX < 0     error code (see #03048)
Note:   setting a task's date and time to before the current date and time
          causes it to execute immediately
SeeAlso: AX=CB0Bh,AX=CB0Ch,AX=CB10h
--------F-2FCB0E-----------------------------
INT 2F - Communicating Applications Specification - GET EXTERNAL DATA BLOCK
        AX = CB0Eh
        DS:DX -> 256-byte buffer for external data block (see #03049)
Return: AX = 0000h successful
            DS:DX buffer filled
        AX < 0     error code (see #03048)

Format of CAS external data block:
Offset  Size    Description     (Table 03049)
 00h    BYTE    CAS major version
 01h    BYTE    CAS minor version
 02h 68 BYTEs   ASCIZ path to directory containing CAS software, ends in slash
 46h 13 BYTEs   ASCIZ name of current phonebook (in CAS directory)
 53h 13 BYTEs   ASCIZ name of current logo file (in CAS directory)
 60h 32 BYTEs   ASCIZ default sender name
 80h 21 BYTEs   ASCIZ CCITT identification of fax device
 95h 107 BYTEs  reserved
--------F-2FCB0F-----------------------------
INT 2F - Communicating Applications Specification - GET/SET AUTORECEIVE
        AX = CB0Fh
        DL = subfunction
            00h get current autoreceive state
            01h set autoreceive state
                DH = number of rings before answer, 00h = never
Return: AX = 0000h autoreceive disabled
        AX = N     number of rings before answer
        AX < 0     error code (see #03048)
--------F-2FCB10-----------------------------
INT 2F - Communicating Applications Specification - GET CURRENT EVENT STATUS
        AX = CB10h
        DS:DX -> 512-byte buffer for status area (see #03051)
Return: AX = 0000h successful
                BX = event handle of current event or negative error code if
                      no current event
                buffer filled
        AX < 0     error code (see #03048)
SeeAlso: AX=CB02h,AX=CB0Dh

(Table 03050)
Values for CAS event type:
 00h    send
 01h    receive
 02h    polled send
 03h    polled receive
 04h to 7Fh reserved
 FFh    serious hardware error

Format of CAS status area:
Offset  Size    Description     (Table 03051)
 00h    BYTE    event type (see #03050)
 01h    BYTE    transfer type
                00h 200x200 dpi, FAX mode
                01h 100x200 dpi, FAX mode
                02h file transfer mode
                03h to 7Fh reserved
 02h    WORD    event status (see #03052)
 04h    WORD    event time (packed DOS time format, see INT 21/AX=5700h)
 06h    WORD    event date (packed DOS date format, see INT 21/AX=5700h)
 08h    WORD    number of files to transfer, max 7FFFh
 0Ah    WORD    offset of file transfer record
 0Ch 47 BYTEs   ASCIZ phone number to call
 3Bh 64 BYTEs   ASCIZ application-specific tag string
 7Bh    BYTE    reserved (00h)
 7Ch    BYTE    connect time, seconds
 7Dh    BYTE    connect time, minutes
 7Eh    BYTE    connect time, hours
 7Fh    DWORD   total number of pages in all files
 83h    DWORD   pages already transmitted
 87h    WORD    number of files already transmitted
 89h    BYTE    cover page flag
                00h don't transmit cover page
                01h transmit cover page
                02h to 7Fh reserved
 8Ah    WORD    total number of transmission errors
 8Ch 78 BYTEs   reserved (zeros)
 DAh 21 BYTEs   ASCIZ remote FAX's CCITT identification
 EFH 32 BYTEs   ASCIZ destination name
10Fh 32 BYTEs   ASCIZ sender name
12Fh 80 BYTEs   filename of PCX logo file (max 1780x800 pixels)
17Fh 128 BYTEs  file transfer record for current event (see #03053)

(Table 03052)
Values for CAS event status:
 0000h  completed successfully
 0001h  waiting
 0002h  number dialed
 0003h  connected, sending
 0004h  connected, receiving
 0005h  aborted
 0006h to 007Fh reserved
 0080h to 7FFFh application-specific events
 8000h to FFFFh error codes

Format of CAS file transfer record:
Offset  Size    Description     (Table 03053)
 00h    BYTE    file type (ignored unless FAX)
                00h ASCII
                01h PCX
                02h DCX
                03h to 7Fh reserved
 01h    BYTE    text size for ASCII FAX file
                00h = 80 columns by 66 lines (11 inches)
                01h = 132 columns by 88 lines (11 inches)
                02h to 7Fh reserved
 02h    BYTE    status of file
                00h untouched
                01h opened
                02h moved
                03h deleted
                04h not yet received
                05h to 7Fh reserved
 03h    DWORD   bytes already transmitted
 07h    DWORD   file size in bytes
 0Bh    WORD    pages alread transmitted
 0Dh    WORD    number of pages in file
 0Fh 80 BYTEs   ASCIZ filename
 5Fh    BYTE    1/8 inch page length
                if page length below set to 01h through 7Fh, this value
                  specifies additional 1/8 inch increments to page length
 60h    BYTE    page length
                00h = 11 inches
                01h to 7Fh = page length is this number of inches plus value of
                          1/8 inch field above
                80h to FEh reserved
                FFh = ASCII pages ending with formfeed
 61h 31 BYTEs   reserved (zeros)
--------F-2FCB11-----------------------------
INT 2F - Communicating Applications Specification - GET QUEUE STATUS
        AX = CB11h
        DL = queue to get status of
            00h task queue
            01h receive queue
            02h log queue
            03h send events (v1.2+)
            04h receive events (v1.2+)
Return: AX >= 0  total number of changes made to queue, modulo 32768
            BX = number of control files currently in queue
            CX = number of received files (zero for task and log queues)
        AX < 0  error code (see #03048)
SeeAlso: AX=CB12h
--------F-2FCB11DL03-------------------------
INT 2F - Communicating Applications Spec v1.2+ - GET NUMBER OF SEND EVENTS
        AX = CB11h
        DL = 03h
Return: AX = number of successful sends since resident manager started
        BX = number of unsuccessful sends, including warnings
SeeAlso: AX=CB11h/DL=04h
--------F-2FCB11DL04-------------------------
INT 2F - Communicating Applications Spec v1.2+ - GET NUMBER OF RECEIVE EVENTS
        AX = CB11h
        DL = 04h
Return: AX = number of received file events since resident manager started
        BX = number of received FAX events
SeeAlso: AX=CB11h/DL=03h
--------F-2FCB12-----------------------------
INT 2F - Communicating Applications Specification - GET HARDWARE STATUS
        AX = CB12h
        DS:DX -> 128-byte status buffer (see #03054,#03056)
Return: AX = 0000h successful
            DS:DX buffer filled with hardware-dependent status information
           < 0     error code (see #03048)
SeeAlso: AX=CB10h,AX=CB11h

Format of status buffer for Intel Connection CoProcessor:
Offset  Size    Description     (Table 03054)
 00h    BYTE    Connection CoProcessor connection status flags (see #03057)
 01h    BYTE    number of kilobytes of free buffer space
 02h    BYTE    page buffer status
                bit 7: Connection CoProcessor has documents to send
                bits 6-0: number of pages in buffer
 03h    BYTE    number of retries left for dialing number
 04h    BYTE    page number to retransmit
 05h    BYTE    communications status (see #03058)
 06h    BYTE    baud rate (see #03055)
 07h  3 BYTEs   reserved
 0Ah    BYTE    Connection CoProcessor hardware status (see #03059)
 0Bh    BYTE    Connection CoProcessor switch states (see #03060)
 0Ch    BYTE    communications flags (see #03061)
 0Dh    BYTE    reserved
 0Eh    WORD    error count (only valid while busy, reset when idle)
 10h    DWORD   size of nonstandard format (NSF) file in bytes
 14h    BYTE    'A' if Connection CoProcessor board present
 15h  9 BYTEs   reserved
 1Eh 21 BYTEs   ASCIZ CCITT identification
 33h 77 BYTEs   reserved
Note:   the Intel Connection CoProcessor and SatisFAXtion may be distinguished
          by examining the byte at offset 14h

Bitfields for Connection CoProcessor baud rate:
Bit(s)  Description     (Table 03055)
 7      reserved
 6-4    baud rate
        000 = 300 baud  (V.21 SDLC or HDLC mode)
        100 = 2400 baud (V.27 ter)
        101 = 4800 baud (V.27 ter)
        110 = 7200 baud (V.29)
        111 = 9600 baud (V.29)
 3-0    reserved, should be 0110

Format of status buffer for Intel SatisFAXtion board:
Offset  Size    Description     (Table 03056)
 00h    BYTE    SatisFAXtion connection status flags (see #03062)
 01h    BYTE    SatisFAXtion board state (see #03063)
 02h    BYTE    number of KB free in buffer
 03h    BYTE    number of pages or files in buffer
 04h    BYTE    number of redials remaining on current number
 05h    BYTE    FAX page number to retransmit
 06h    BYTE    current page/file in block transfer
 07h    BYTE    number of rings received (only if auto-answer enabled)
 08h    WORD    error count
 0Ah    DWORD   length of file being transferred
 0Eh  6 BYTEs   reserved
 14h    BYTE    'B' if SatisFAXtion board present
 15h 13 BYTEs   ASCIZ transfer agent name
 22h  5 BYTEs   ASCIZ transfer agent version number
 27h 13 BYTEs   ASCIZ resident loader name
 34h  5 BYTEs   ASCIZ resident loader version number
 39h 21 BYTEs   ASCIZ remote CSID
 4Eh 13 BYTEs   ASCIZ resident manager name
 5Bh  5 BYTEs   ASCIZ resident manager version number
 60h 32 BYTEs   reserved
Note:   the Intel Connection CoProcessor and SatisFAXtion may be distinguished
          by examining the byte at offset 14h

Bitfields for Connection CoProcessor connection status flags:
Bit(s)  Description     (Table 03057)
 7      hardware busy sending or receiving
 6      last page of data
 5      no data on current page
 4      retransmit request for current page being transmitted
 3      NSF (nonstandard file) mode active
 2-0    reserved

Bitfields for communications status:
Bit(s)  Description     (Table 03058)
 7      originating call
 6      FAX message to be sent
 5      on line
 4      ring detected and receive enabled
 3      buffer dumped on receive
 2-0    hardware sequence state
        000 idle
        001 dial
        010 answer
        011 transmit
        100 receive
        101 pre-message
        110 post-message
        111 disconnect

Bitfields for Connection CoProcessor hardware status:
Bit(s)  Description     (Table 03059)
 7      modem option installed
 6      Connection CoProcessor has control of DAA (not latched)
 5      on line (not latched)
 4      ring detected (not latched)
 3      data in command buffer (not latched)
 2      set if using DMA channel 1, clear if using DMA channel 3
 1      line length compensation 1 set (not latched)
 0      line length compensation 0 set (not latched)

Bitfields for Connection CoProcessor switch states:
Bit(s)  Description     (Table 03060)
 7      reserved
 6      unused
 5      spare switch open
 4      FAX ADR1 switch open
 3      FAX ADR0 switch open
 2      alternate interrupt switch open
 1      COM SEL 1 switch open
 0      COM SEL 0 switch open
Note:   valid combinations of 0-2 are
        000  COM2 IRQ3 IObase 2F8h
        001  COM1 IRQ4 IObase 3F8h
        010  COM4 IRQ3 IObase 2E8h
        011  COM3 IRQ4 IObase 3E8h
        110  COM4 IRQ2 IObase 2E8h
        111  COM3 IRQ5 IObase 3E8h

Bitfields for communications flags:
Bit(s)  Description     (Table 03061)
 7      reserved
 6      auxiliary relay forced ON
 5      modem select relay forced ON
 4      offhook relay forced ON
 3      9600 bps enabled
 2      7200 bps enabled
 1      4800 bps enabled
 0      2400 bps enabled

Bitfields for SatisFAXtion connection status flags:
Bit(s)  Description     (Table 03062)
 7      busy in T.30 CCITT fax protocol
 6      data on current page/file (only used for block xfers)
 5      retransmission of last page requested
 4      in file transfer mode
 3      data in buffer
 2      data buffer dumped on receive
 1      200x100 dpi resolution instead of 200x200 dpi
 0      data modem in use, FAX image modem not available

Bitfields for SatisFAXtion board state:
Bit(s)  Description     (Table 03063)
 7      reserved
 6      handset jack active, data and FAX modems not available
 5-3    current rate
        000  300 bps (V.21 HDLC)
        100 2400 bps (V.27 ter)
        101 4800 bps (V.27 ter)
        110 7200 bps (V.29)
        111 9600 bps (V.29)
 2-0    T.30 CCITT protocol state
        000 idle
        001 dialing
        010 answering
        011 transmitting
        100 receiving
        101 pre-message
        110 post-message
        111 disconnect
--------F-2FCB13DL00-------------------------
INT 2F - Communicating Applications Specification - GET DIAGNOSTICS RESULTS
        AX = CB13h
        DL = 00h
Return: AX = 0040h in progress
           >= 0    passed
           < 0     hardware-dependent failure code (see #03064,#03065)
SeeAlso: AX=CB13h/DL=01h

Bitfields for Intel Connection CoProcessor failure codes:
Bit(s)  Description     (Table 03064)
 3      9600 bps FAX modem module failed
 2      SDLC chip failed
 1      RAM failed
 0      ROM checksum failed

Bitfields for Intel SatisFAXtion failure codes:
Bit(s)  Description     (Table 03065)
 1      2400 bps data modem failed
 0      9600 bps FAX modem failed
--------F-2FCB13DL01-------------------------
INT 2F - Communicating Applications Specification - START DIAGNOSTICS
        AX = CB13h
        DL = 01h
Return: AX = 0000h successfully started
        AX < 0     error code (see #03048)
SeeAlso: AX=CB13h/DL=00h
--------F-2FCB14-----------------------------
INT 2F - Communicating Applications Specification - MOVE RECEIVED FILE
        AX = CB14h
        BX = event handle
        CX = receive file number
            0001h first received file
            N     Nth received file
        DS:DX -> ASCIZ string specifying new name for file (must not exist)
Return: AX = 0000h successful
        AX < 0     error code (see #03048)
--------F-2FCB15-----------------------------
INT 2F - Communicating Applications Specification - SUBMIT FILE TO SEND
        AX = CB15h
        DS:DX -> variable-length data area (see #03066)
Return: AX >= 0 event handle
        AX < 0  error code (see #03048)
SeeAlso: AX=CB01h

Format of CAS file submission data area:
Offset  Size    Description     (Table 03066)
 00h    BYTE    transfer type
                00h = 200x200 dpi, fax mode
                01h = 100x200 dpi, fax mode
                02h = file transfer mode
                03h to 7Fh reserved
 01h    BYTE    text size
                00h = 80 columns
                01h = 132 columns
                02h to 7Fh reserved
 02h    WORD    time to send (DOS packed time, see #01665 at INT 21/AX=5700h)
 04h    WORD    date to send (DOS packed date, see #01666 at INT 21/AX=5700h)
 06h 32 BYTEs   ASCIZ destination name
 26h 80 BYTEs   ASCIZ name of file to send
 76h 47 BYTEs   ASCIZ phone number to dial
 A5h 64 BYTEs   ASCIZ application-specific tag string
 E5h    BYTE    reserved (00h)
 E6h    BYTE    cover page
                00h don't send cover page
                01h send cover page
                02h to 7Fh reserved
 E7h 23 BYTEs   reserved (zeros)
 FEh variable   ASCIZ string containing text of cover page (if cover page flag
                set to 01h)
--------F-2FCB16BX1234-----------------------
INT 2F - Communicating Applications Spec v1.2+ - UNLOAD RESIDENT MANAGER
        AX = CB16h
        BX = 1234h
        CX = 5678h
        DX = 9ABCh
Return: AX = 0000h successful
        AX < 0     error code
Note:   the METZ XpressFax CASMGR ignores the values in BX,CX, and DX
SeeAlso: AX=C000h/BX=444Bh,AX=CB00h
Index:  uninstall;CAS Manager
--------F-2FCB17-----------------------------
INT 2F - Communicating Applications Spec v1.2+ - SET COVER PAGE STATUS
        AX = CB17h
        BX = event handle
        CL = cover page status
            00h not read
            01h read by user
Return: AX = 0000h successful
        AX < 0     error code
--------F-2FCB80-----------------------------
INT 2F - Intel SatisFAXtion CASMGR - ???
        AX = CB80h
        ???
Return: ???
--------F-2FCB81-----------------------------
INT 2F - Intel SatisFAXtion CASMGR - ???
        AX = CB81h
        ???
Return: ???
--------F-2FCB82-----------------------------
INT 2F - Intel SatisFAXtion CASMGR - ???
        AX = CB82h
        ???
Return: ???
--------F-2FCBDCBL56-------------------------
INT 2F - Comwave Microfax Specification - GET STATUS ARRAY
        AX = CBDCh
        BL = 56h
        BH = line number (starts with 1)
        CX:DX -> 32-byte status buffer or 80 character string
Return: AX = number of cards installed, or FFFFh on error
Program: Comwave manufacturers the Microfax line of fax cards which are a
          high-performance multi-card FAX solution for OEMs.
Note:   defaults to AH=CBh but can be changed
SeeAlso: AX=CBDDh,AX=DA00h
--------F-2FCBDDBL56-------------------------
INT 2F - Comwave Microfax Specification - COMMAND SUBMISSION
        AX = CBDDh
        BL = 56h
        BH = ?
        CX:DX -> command to execute
Return: AX = status
            0000h success
            FFFFh on error
SeeAlso: AH=2Ah,AX=CBDCh,AX=80FBh
--------c-2FCC--SI5453-----------------------
INT 2F U - PC-Kwik Programs - API
        AH = CCh
        SI = 5453h or 7473h
        AL = function number (at least 00h,01h,04h,05h,07h,80h)
        DL = program identifier (see #03067)
Return: SI = 7473h
        other registers vary by function
Note:   Qualitas Qcache v4.00 is an OEM version of Super PC-Kwik v4.00, and
          thus supports this call
SeeAlso: INT 21/AH=2Bh/CX=4358h

(Table 03067)
Values for PC-Kwik program identifier:
 00h    all installed PowerPak programs
 01h    SUPERPCK/SUPER/QCACHE v4.00+ (disk cache)
 02h    PCKSPL (print spooler)
 04h    PCKSCRN (screen accelerator)
 05h    PCKKEY (keyboard enhancer)
 06h    PCKRAMD (RAM disk)
 08h    PCKWIK.SYS
 10h    PCKCDROM (CD-ROM support for SUPERPCK)
--------N-2FCC00-----------------------------
INT 2F - Tsoft NFSDRVR - INSTALLATION CHECK
        AX = CC00h
Return: AX = 7777h
        BX = ???
        CX = ???
        DX = ???
        ES = data segment of resident portion
SeeAlso: AX=CC01h,AX=CC06h
--------N-2FCC01-----------------------------
INT 2F - Tsoft NFSDRVR - ???
        AX = CC01h
        ???
Return: ???
SeeAlso: AX=CC00h
--------N-2FCC02-----------------------------
INT 2F - Tsoft NFSDRVR - ???
        AX = CC02h
        ???
Return: ???
SeeAlso: AX=CC00h
--------N-2FCC03-----------------------------
INT 2F - Tsoft NFSDRVR - ???
        AX = CC03h
        ???
Return: ???
SeeAlso: AX=CC00h
--------N-2FCC04-----------------------------
INT 2F - Tsoft NFSDRVR - ???
        AX = CC04h
        ???
Return: ???
SeeAlso: AX=CC00h
--------N-2FCC05-----------------------------
INT 2F - Tsoft NFSDRVR - ???
        AX = CC05h
        ???
Return: ???
SeeAlso: AX=CC00h
--------N-2FCC06-----------------------------
INT 2F - Tsoft NFSDRVR - ???
        AX = CC06h
        ???
Return: ???
SeeAlso: AX=CC00h
--------P-2FCD00-----------------------------
INT 2F - Intel Image Processing Interface - INSTALLATION CHECK
        AX = CD00h
Return: AL = state
            00h not installed, OK to install
            01h not installed, not OK to install
            FFh installed
SeeAlso: AX=CD02h"Image"
--------P-2FCD00-----------------------------
INT 2F - LaserPort Interface - INSTALLATION CHECK
        AX = CD00h
Return: AL = status
            FFh installed
SeeAlso: AX=CD0Fh"LaserPort"
--------U-2FCD00-----------------------------
INT 2F - SWELL.EXE - INSTALLATION CHECK
        AX = CD00h
Return: AX = 00FFh installed
            BH = major version
            BL = minor version
Program: SWELL.EXE is a TSR which swaps programs to disk when they EXEC a
          child process with INT 21/AH=4Bh
--------s-2FCD00BX464F-----------------------
INT 2F - Forte/Gravis ULTRAMID - INSTALLATION CHECK
        AX = CD00h
        BX = 464Fh ('FO')
        CX = 5254h ('RT')
        DX = 4520h ('E ')
Return: AL = FFh if installed
            BX = 4155h ('AU')
            CX = 4449h ('DI')
            DX = 4F20h ('O ')
            ES:SI -> program ID string
Program: ULTRAMID is a MIDI driver for the Gravis UltraSound which allows use
          of AIL drivers with other software
Range:  AH=CDh-ECh, selected by scanning for an available multiplex number
SeeAlso: INT 21/AX=FD12h,AX=CD00h/DX=4957h
--------s-2FCD00DX4957-----------------------
INT 2F R - InterWave Game API - INSTALLATION CHECK
        AX = CD00h
        DX = 4957h ('IW')
        SI = 5645h ('VE')
Return: AL = FFh if installed
            DX = 4554h ('ET')
            SI = 454Bh ('EK')
Range:  AH=CDh-ECh, selected by scanning for an available multiplex number
SeeAlso: AX=CD00h/BX=464Fh,AX=CD01h"InterWave",AX=CD21h"InterWave"
SeeAlso: AX=CD80h"InterWave"
--------P-2FCD01-----------------------------
INT 2F - Intel Image Processing Interface - SET DEVICE NAME
        AX = CD01h
        CX:BX -> ASCIZ character device name ("LPTn", "COMn", "PRN")
Return: AL = status
            00h successful
                CX:BX -> internal character device name
            80h error
--------U-2FCD01-----------------------------
INT 2F - SWELL.EXE - SUSPEND ONCE
        AX = CD01h
Return: AX = 0000h
SeeAlso: AX=CD02h"SWELL"
--------s-2FCD01BX0000-----------------------
INT 2F R - InterWave Game API - GET NUMBER OF INTERWAVE PROGRAMS / PROGRAM ID
        AX = CD01h
        BX = 0000h
Return: BX = number of programs currently installed on the Game API
Desc:   get the number of programs supporting the InterWave Game API which are
          currently installed in memory, which also forms the next program ID
          number if the caller wishes to go resident on the API
Range:  AH=CDh-ECh, selected by scanning for an available multiplex number
Notes:  the first program to install on the IW Game API must use ID 00h
        the AMD-recommended implementation is for the handler to increment
          BX and chain to the previous handler (if any), but this will fail
          if TSRs are unloaded out-of-order
SeeAlso: AX=CD00h"InterWave",AX=CD02h"InterWave",AX=CD03h"InterWave"
SeeAlso: AX=CD05h"InterWave",AX=CD21h"InterWave",AX=CD80h"InterWave"
--------P-2FCD02-----------------------------
INT 2F - Intel Image Processing Interface - GET VERSION NUMBER
        AX = CD02h
Return: AL = status
            00h/01h successful
                BH = major version number (BCD)
                BL = minor version number (BCD)
            80h error
Note:   if return AL = 01h, the IPI supports network redirection
SeeAlso: AX=CD00h"Image"
--------U-2FCD02-----------------------------
INT 2F - SWELL.EXE - SUSPEND
        AX = CD02h
Return: AX = 0000h
SeeAlso: AX=CD03h"SWELL"
--------s-2FCD02-----------------------------
INT 2F R - InterWave Game API - GET PROGRAM STATUS AND INFORMATION
        AX = CD02h
        BX = program identifier
Return: CX = program status
            bit 0: using synthesizer
            bit 1: using Codec
            bit 2: supports at least one Game Device (see AX=CD21h,AX=CD22h)
        BX = supported API version (BCD, BH=major, BL=minor) if CX bit 2 set
        ES:DI -> ASCIZ identification string
Range:  AH=CDh-ECh, selected by scanning for an available multiplex number
Note:   ordinarily, an application will loop through all valid program
          identifiers (as returned by AX=CD01h); if any of the installed
          programs conflicts with the use the caller wishes to make of the
          InterWave chip, it should be disabled with AX=CD03h first
SeeAlso: AX=CD00h"InterWave",AX=CD01h"InterWave",AX=CD03h"InterWave"
SeeAlso: AX=CD05h"InterWave",AX=CD21h"InterWave",AX=CD80h"InterWave"
--------P-2FCD03-----------------------------
INT 2F - Intel Image Processing Interface - SELECT SCAN LINE
        AX = CD03h
        BX = scan line
        CX = requested density in dots per inch (300, 600, or 1200)
Return: AL = status (see also AX=CD04h"Image")
            00h successful
                CX = density at which scan line was mapped
                ES:DI -> start of scan line
            80h unsuccessful
            81h scan line out of range
            82h unsupported scan line density
            83h out of memory
SeeAlso: AX=CD04h"Image"
--------U-2FCD03-----------------------------
INT 2F - SWELL.EXE - ACTIVATE
        AX = CD03h
Return: AX = 0000h
SeeAlso: AX=CD02h"SWELL"
--------s-2FCD03-----------------------------
INT 2F R - InterWave Game API - SUSPEND PROGRAM
        AX = CD03h
        BX = installed program identifier
        CX = InterWave section to be released
            0000h all
            0001h synthesizer
            0002h Codec
Return: AL = status
            00h successful
                BX = base port
                CL = IRQ
                CH = DMA channel (Codec only)
            else failed
SeeAlso: AX=CD00h"InterWave",AX=CD01h"InterWave",AX=CD02h"InterWave"
SeeAlso: AX=CD04h"InterWave",AX=CD21h"InterWave",AX=CD80h"InterWave"
--------P-2FCD04-----------------------------
INT 2F - Intel Image Processing Interface - MOVE BITMAP TO SCANLINE
        AX = CD04h
        CX:BX -> structure (see #03069)
Return: AL = status (see #03068)
SeeAlso: AX=CD03h"Image"

(Table 03068)
Values for IPI function status:
 00h    successful
 80h    unsuccessful
 81h    scan line out of range
 82h    unsupported scan line density
 83h    out of memory
 84h    unrecognized source
 85h    initialization error

Format of structure:
Offset  Size    Description     (Table 03069)
 00h    WORD    image source (0 = conventional memory, 1 = expanded memory)
 02h    DWORD   pointer to image data
 06h    WORD    scan line on which to place
 08h    WORD    bit offset from start of scan line at which to place
 0Ah    WORD    density of bitmap data (300, 600, or 1200 dpi)
 0Ch    WORD    width in bits of data
 0Eh    WORD    source logical page number
 10h    WORD    source handle (only if source in expanded memory)
 12h    WORD    source offset (only if source in expanded memory)
--------U-2FCD04-----------------------------
INT 2F - SWELL.EXE - TURN OFF VERBOSE MODE
        AX = CD04h
Return: AX = 0000h
SeeAlso: AX=CD05h"SWELL"
--------s-2FCD04-----------------------------
INT 2F R - InterWave Game API - WAKE PROGRAM
        AX = CD04h
        BX = installed program identifier
Return: AL = status
            00h successful
            else failed
Note:   this function should only be called after the program has been
          suspended with AX=CD03h
SeeAlso: AX=CD00h"InterWave",AX=CD01h"InterWave",AX=CD03h"InterWave"
SeeAlso: AX=CD05h"InterWave",AX=CD21h"InterWave",AX=CD80h"InterWave"
SeeAlso: INT 7E/AL=84h"IWSBSDRV"
--------P-2FCD05-----------------------------
INT 2F - Intel Image Processing Interface - PRINT PAGE
        AX = CD05h
Return: AL = status (00h,80h) (see #03068)
Note:   page image is retained, so multiple calls will print multiple copies of
          the page
SeeAlso: AX=CD06h"Image"
--------U-2FCD05-----------------------------
INT 2F - SWELL.EXE - TURN ON VERBOSE MODE
        AX = CD05h
Return: AX = 0000h
SeeAlso: AX=CD04h"SWELL"
--------s-2FCD05-----------------------------
INT 2F R - InterWave Game API - UNINSTALL RESIDENT DEVICE DRIVER
        AX = CD05h
        BX = installed program identifier
Return: AL = status
            00h successful
            else failed
SeeAlso: AX=CD00h"InterWave",AX=CD01h"InterWave",AX=CD02h"InterWave"
SeeAlso: AX=CD03h"InterWave",AX=CD21h"InterWave",AX=CD80h"InterWave"
--------P-2FCD06-----------------------------
INT 2F - Intel Image Processing Interface - CLEAR PAGE
        AX = CD06h
Return: AL = status (00h,80h) (see #03068)
Note:   palette is reset to default
SeeAlso: AX=CD09h"Image"
--------U-2FCD06-----------------------------
INT 2F - SWELL.EXE - UNINSTALL
        AX = CD06h
Return: AX = status
            0000h uninstalled
            8002h programs still swapped, not uninstalled
--------P-2FCD07-----------------------------
INT 2F - Intel Image Processing Interface - reserved
        AX = CD07h
SeeAlso: AX=CD00h"Image"
--------U-2FCD07-----------------------------
INT 2F - SWELL.EXE - GET INFO
        AX = CD07h
        ES:BX -> 32-byte buffer for info (see #03070)
Return: AX = status
            0000h successful
                ES:BX buffer filled
            8001h buffer wrong size

Format of SWELL.EXE info buffer:
Offset  Size    Description     (Table 03070)
 00h    WORD    20h  (total size of buffer)
 02h    BYTE    suspend-once mode active if nonzero
 03h    BYTE    00h active, 01h suspended
 04h    BYTE    00h quiet, 01h verbose
 05h    BYTE    "Borland support" (allowing INT 21/AX=4B01h) on if nonzero
 06h 26 BYTEs   unused???
--------P-2FCD08-----------------------------
INT 2F - Intel Image Processing Interface - SCREEN IMAGE
        AX = CD08h
        CX:BX -> structure (see #03071)
Return: AL = status (00h,80h-85h) (see #03068)
SeeAlso: AX=CD05h"Image",AX=CD09h"Image"

Format of IPI screen image structure:
Offset  Size    Description     (Table 03071)
 00h    WORD    image source (0 = conventional memory, 1 = expanded memory)
 02h    DWORD   pointer to image data
 06h    WORD    horizontal position on paper of left edge (in 1200 dpi units)
 08h    WORD    vertical position on paper of top edge (in 1200 dpi units)
 0Ah    WORD    left cropping (currently must be zero)
 0Ch    WORD    top cropping (currently must be zero)
 0Eh    WORD    width (currently must be 8000h)
 10h    WORD    height (currently must be 8000h)
 12h    WORD    horizontal size of image in 1200 dpi units
 14h    WORD    vertical size of image in 1200 dpi units
 16h    WORD    aspect ratio (currently reserved)
 18h    WORD    initialization flag (if 01h, initialization is performed)
 1Ah    WORD    pixels per line of source data
 1Ch    WORD    number of scan lines in source data
 1Eh    WORD    number of scan lines in packet
 20h    WORD    bits per pixel (1,2,4,6, or 8)
 22h    WORD    pixels per byte (1,2,4, or 8)
 24h    WORD    compression type (currently only 00h [uncompressed] supported)
 26h    WORD    source page number (if in expanded memory)
 28h    WORD    source handle (if in expanded memory)
 2Ah    WORD    source offset (if in expanded memory)
--------U-2FCD08-----------------------------
INT 2F - SWELL.EXE - UNUSED
        AX = CD08h
Return: AX = FFFFh (error)
--------P-2FCD09-----------------------------
INT 2F - Intel Image Processing Interface - LOAD SCREEN
        AX = CD09h
        CX:BX -> structure (see #03072)
Return: AL = status (00h,80h) (see #03068)
SeeAlso: AX=CD06h"Image Processing",AX=CD0Ah"Image Processing"

Format of IPI load screen structure:
Offset  Size    Description     (Table 03072)
 00h    BYTE    style
                44h ('D') diamond style
                4Ch ('L') line style
 01h    BYTE    reserved (00h)
 02h    WORD    frequency in lines per inch [sic]
                currently, coerced to nearest of 50, 60, 68, 70, 75, 85, or 100
 04h    WORD    screen angle in degrees (-360 to 360)
                currently coerced to nearest of -45, 0, 45, or 90
--------U-2FCD09-----------------------------
INT 2F - SWELL.EXE - TURN OFF "BORLAND SUPPORT"
        AX = CD09h
Return: AX = 0000h
SeeAlso: AX=CD0Ah"SWELL"
--------P-2FCD0A-----------------------------
INT 2F - Intel Image Processing Interface - LOAD PALETTE
        AX = CD0Ah
        CX:BX -> palette structure (see #03073)
Return: AL = status (00h,80h) (see #03068)
SeeAlso: AX=CD09h"Image Processing"

Format of IPI palette structure:
Offset  Size    Description     (Table 03073)
 00h    BYTE    bits per pixel for which palette is to be used (1,2,4,6, or 8)
 01h    2**N    palette translation values, one per possible pixel value
--------U-2FCD0A-----------------------------
INT 2F - SWELL.EXE - TURN ON "BORLAND SUPPORT"
        AX = CD0Ah
Return: AX = 0000h
SeeAlso: AX=CD09h"SWELL"
--------P-2FCD0F-----------------------------
INT 2F - LaserPort Interface - EXECUTE FUNCTION
        AX = CD0Fh
        BL = function
                01h enable
                02h disable
                03h ???
Return: AL = status
            00h success
SeeAlso: AX=CD00h"LaserPort"
--------s-2FCD21-----------------------------
INT 2F R - InterWave Game API - OPEN GAME DEVICE
        AX = CD21h
        BX = installed program identifier
        ES:DI -> ASCIZ device name
            "MIDISIMPLE"
            "MIDICOMPLEX"
            "DIRECTCODEC"
Return: AL = status
            00h successful
                DX = device handle
                ---MIDISIMPLE and MIDICOMPLEX---
                BX = real-mode interrupt number (see #03074,#03075)
                ---DIRECTCODEC---
                BX = base port
                CL = IRQ
                CH = DMA channel (04h = no DMA)
                SI = size of FIFO in bytes (0000h = use DMA)
            nonzero failed (not supported or already in use)
        AH may be destroyed
Range:  AH=CDh-ECh, selected by scanning for an available multiplex number
SeeAlso: AX=CD00h"InterWave",AX=CD01h"InterWave",AX=CD02h"InterWave"
SeeAlso: AX=CD05h"InterWave",AX=CD22h"InterWave",AX=CD80h"InterWave"

(Table 03074)
Call MIDISIMPLE with:
        EAX = function number
            0001h MIDI byte out
                BL = MIDI byte to send
            0002h MIDI string out
                ECX = length of MIDI string in bytes
                ES:EDI -> MIDI string to send (should not include timing info)
        DX = device handle
        INT xxh (as returned by AX=CD21h)
Return: EAX = status
            00000000h if successful
            FFFFFFFFh on error (bad handle)
SeeAlso: #03075,INT 7E/AX=0001h"IWSBSDRV",INT 7E/AX=0002h"IWSBSDRV"

(Table 03075)
Call MIDICOMPLEX with:
        EAX = function number
            ??? (specification is still in development)
        DX = device handle
        INT xxh (as returned by AX=CD21h)
Return: EAX = status
            00000000h if successful
            FFFFFFFFh on error (bad handle)
SeeAlso: #03074
--------s-2FCD22-----------------------------
INT 2F R - InterWave Game API - CLOSE GAME DEVICE
        AX = CD22h
        BX = installed program identifier
        DX = device handle (from AX=CD21h)
Return: AL = status
            00h successful
            FFh inavlid handle or device is not open
Range:  AH=CDh-ECh, selected by scanning for an available multiplex number
SeeAlso: AX=CD00h"InterWave",AX=CD01h"InterWave",AX=CD02h"InterWave"
SeeAlso: AX=CD05h"InterWave",AX=CD21h"InterWave",AX=CD80h"InterWave"
--------s-2FCD80-----------------------------
INT 2F RC - InterWave Game API - MIXER SETTINGS CHANGED BROADCAST
        AX = CD80h
Return: nothing
Desc:   called by an application controlling the InterWave chip's mixer
          whenever the mixer's settings are changed
Range:  AH=CDh-ECh, selected by scanning for an available multiplex number
Note:   when an application intercepts this function call, it must read the
          new mixer settings from the InterWave chip
SeeAlso: AX=CD00h"InterWave",AX=CD01h"InterWave",AX=CD02h"InterWave"
SeeAlso: AX=CD05h"InterWave",AX=CD21h"InterWave",AX=CD22h"InterWave"
--------K-2FCF00-----------------------------
INT 2F - TEMPLEXX 1.0 - INSTALLATION CHECK
        AX = CF00h
Return: AL = FFh if installed
Program: TEMPLEXX is a popup keyboard template by Henson Scientific, Inc.
Note:   values in AL other than 00h cause an immediate return without modifying
          any registers
--------G-2FD000-----------------------------
INT 2F C - MDEBUG display driver - GET DRIVER STATUS
        AX = D000h
Return: CF set on error
            all other registers must be unchanged)
        CF clear if successful
            AL = FFh
            AH = driver semaphor
                00h driver is not active
                01h driver is active
            BX = CS of the driver
            CX = driver version (CH = major, CL = minor, must be >= 013Ch)
            DL = buffer semaphor
                00h driver is not pending
                01h driver is pending between functions 02h and 03h
            DH = show semaphor
                00h driver is not pending
                01h driver is pending between functions 04h and 05h
Program: MDEBUG is a shareware memory-resident debugging tool by Bernd
          Schemmer, including a memory monitor, an interpreter and a
          disassembler
Range:  AH=C0h to AH=FFh, selected by switch or programmatically
Notes:  MDEBUG can use any two consecutive multiplex numbers between C0h and
          FFh; the default is D0h for the display driver and D1h for the
          command driver (call INT 60/AH=00h"MDEBUG" for the actual multiplex
          numbers used)
        this function MUST be reentrant, as MDEBUG calls it after every popup
          before any other actions.  The handler should not change any
          registers if the display is in an unsupported mode or in a mode
          MDEBUG supports itself, e.g. a normal text mode with at least 80x25
          characters (i.e. 80x43 or 132x44 (v1.60+)). In this case MDEBUG will
          not call any of the other functions for this popup session.
        MDEBUG will not call the other functions if the returned version is
          less than the actual version of MDEBUG.
        if the driver is reentrant, DL and DH should be 00h
SeeAlso: AX=D001h,AX=D002h,AX=D003h,AX=D004h,AX=D005h
--------M-2FD000-----------------------------
INT 2F - ZWmous - INSTALLATION CHECK
        AX = D000h
Return: AX = 5A57h ("ZW") if installed
            BX = segment of resident code
Program: ZWmous is a shareware TSR by Zen Wu which permits the use of a mouse
          with many non-mouse applications by entering the letter under the
          mouse cursor on button presses
SeeAlso: INT 33/AX=0003h
--------N-2FD000-----------------------------
INT 2F - Lotus CD/Networker - INSTALLATION CHECK
        AX = D000h
Return: AL = FFh if CD/Networker TSR is loaded
        BX = 4D44h ("MD") signature
        CX = Windows mode word (from INT 2F/AX=1600h) at time of TSR load
        DX = bitmap identifying all loaded CD/Networker TSRs.
Notes:  INT 2F/AH=D0h is used by CD/Networker to communicate between a
          resident redirector TSR and a transient program that controls the
          TSR's CD-ROM drive emulation (volume attachments, caching, etc).
        At present there is only one CD/Networker TSR; the bitmap always = 4.
SeeAlso: AX=D002h"Lotus",INT 2F/AX=1500h"CD-ROM"
--------G-2FD001-----------------------------
INT 2F C - MDEBUG display driver - INITIALIZE DRIVER
        AX = D001h
Return: CF set on error
        AL = driver semaphor
        AH = buffer semaphor
Range:  AH=C0h to AH=FFh, selected by switch or programmatically
Notes:  MDEBUG calls this function after every successful call of the function
          00h. The function should reset all internal data and the status of
          the driver. If this function returns an error, MDEBUG will not call
          the other functions in this popup session.
        MDEBUG can use any two consecutive multiplex numbers between C0h and
          FFh; the default is D0h for the display driver and D1h for the
          command driver
SeeAlso: AX=D000h
--------G-2FD002-----------------------------
INT 2F C - MDEBUG display driver - SAVE GRAPHIC DATA
        AX = D002h
Return: CF set on error
        CF clear if successful
            display memory saved and display switched to one of the text modes
              02h, 03h or 07h.
Note:   MDEBUG calls this function only once every popup session before
          displaying its windows.
SeeAlso: AX=D000h,AX=D003h
--------N-2FD002BX4D44-----------------------
INT 2F - Multiplex - Lotus CD/Networker GET DATA AREA
        AX = D002h
        BX = 4D44h
        DX = bitmap identifying one loaded CD/Networker TSR
Return: ES:DI -> data area owned by TSR
Note:   the format of the data area changes with each minor revision, so it
          cannot be counted on
SeeAlso: AX=D000h"Lotus"
--------G-2FD003-----------------------------
INT 2F C - MDEBUG display driver - RESTORE GRAPHIC DATA
        AX = D003h
Return: CF set on error
        CF clear if successful
            display restored to the mode it was in before calling AX=D002h and
              the display memory is restored
Note:   MDEBUG calls this function only once every popup session just before
         it exits to normal DOS.
SeeAlso: AX=D000h,AX=D002h
--------G-2FD004-----------------------------
INT 2F - MDEBUG display driver - SHOW SAVED DATA
        AX = D004h
Return: CF set on error
        CF clear if successful
            display switched to mode it was in before calling AX=D002h and the
              display memory is restored
Note:   This function needn't save the display memory before changing it.
SeeAlso: AX=D000h,AX=D005h
--------G-2FD005-----------------------------
INT 2F - MDEBUG display driver - SWITCH BACK TO TEXT SCREEN
        AX = D005h
Return: CF set on error
        CF clear if successful
            display restored to mode it was in before calling AX=D004h
Note:   This function needn't save or change the display memory
SeeAlso: AX=D000h,AX=D004h
--------G-2FD0-------------------------------
INT 2F - MDEBUG display driver - RESERVED FUNCTION NUMBERS
        AH = D0h
        AL = 06h-7Fh
Note:   these functions are reserved for future use
--------G-2FD0-------------------------------
INT 2F - MDEBUG display driver - USER DEFINED FUNCTION NUMBERS
        AH = D0h
        AL = 80h-FFh
Note:   these functions numbers are reserved for user defined features (e.g.
          communication between the transient und resident parts of the driver)
--------G-2FD100-----------------------------
INT 2F C - MDEBUG command driver - GET STATUS
        AX = D100h
        BX = version of MDEBUG (BH = major, BL = minor)
        CX = command driver counter
---v1.60+---
        DS:SI -> MDEBUG identification table (see #03076)
        ES = segment of display memory used by MDEBUG
        DI = size of video mode used by MDEBUG
            (high byte = lines, low byte = columns)
Return: DL = FFh
        BX = version number of the driver if it is less than the version in BX,
              else unchanged
        CX incremented
Program: MDEBUG is a shareware memory-resident debugging tool by Bernd
          Schemmer, including a memory monitor, an interpreter, and a
          disassembler
Range:  AH=C0h to AH=FFh, selected by switch or programmatically
Notes:  called by MDEBUG at start of popup session; if the version number
          returned in BX is less than 1.52 (1.60 for MDEBUG v1.70), MDEBUG will
          not call any of the other functions during this popup session
        MDEBUG can use any two consecutive multiplex numbers between C0h and
          FFh; the default is D0h for the display driver and D1h for the
          command driver (call INT 60/AH=00h"MDEBUG" for the multiplex numbers
          actually used)
        this function must end with a far call to the old INT 2F handler after
          changing the registers
        this function MUST be reentrant
        command drivers must also declare the following data at the given
          offsets in the code segment
                100h  3 BYTEs   JMP-command in .COM-files
                103h    BYTE    NOP-command (90h)
                104h 26 BYTEs   signature "Kommandotreiber f�r MDEBUG"
                11Eh 12 BYTEs   name of driver, e.g. "MDHISDRV.COM"
                                each driver must have a unique name
        MDEBUG will pass every key and command to the command driver(s) before
          checking for a valid internal command
SeeAlso: AX=D000h,AX=D101h

Format of MDEBUG identification table:
Offset  Size    Description     (Table 03076)
 -2     WORD    entry offset
 00h    WORD    CS of MDEBUG
 02h    DWORD   old INT 08h vector
 06h    DWORD   old INT 09h vector
 0Ah    DWORD   address INT 16h routine used by MDEBUG
 0Eh    BYTE    length of version string
 0Fh  N BYTEs   version string
--------G-2FD101-----------------------------
INT 2F - MDEBUG command driver - INITIALIZE DRIVER
        AX = D101h
        CX = command driver counter
Return: DL = status
            FFh if successful
                CX incremented
            else error: all registers unchanged
Note:   this function must end with a  far call to the old INT 2F handler after
          changing the registers
        this function must be reentrant
--------G-2FD102-----------------------------
INT 2F - MDEBUG command driver - EXECUTE INTERPRETER COMMAND
        AX = D102h
        BL = first character of the interpreter command
        BH = last character of the interpreter command (or blank)
        DS:SI -> parameter for the interpreter command as ASCIZ string
        DS:DI -> MDEBUG data structure (see #03078)
Return: AL = FFh
        CF set on error
            AH = error number (see #03077)
            DS:SI -> ASCIZ error message (max 30 characters) if AH=0Ch
        CF clear if successful
            AH = return code
                00h continue processing the command line
                01h leave MDEBUG popup session
                02h leave MDEBUG popup session and automatically popup again
                      if the InDOS flag is zero
                03h not used (same as 00h)
                04h not used (same as 00h)
                05h put new command line into the input buffer,
                    DS:SI -> new command line (ASCIZ string, max 66 chars)
                06h process new command line
                    DS:SI -> new command line (ASCIZ string, max 66 chars)
               else unknown status, but continue processing commmand line
Note:   this function must end with a far call to the old INT 2F handler (with
          registers unchanged) if the driver does not support the interpreter
          command in BX.  Otherwise, the driver must not chain to the old
          INT 2F.

(Table 03077)
Values for MDEBUG error number:
 01h    syntax error
 02h    first shell of the command.com is activ
 03h    Esc pressed
 04h    break pressed
 05h    DOS is busy
 06h    command ended
 07h    division by zero
 08h    invalid display driver
 09h    invalid command driver
 0Ah    error 8 and 9
 0Bh    unknown error
 0Ch    new error
 else   unknown error

Format of MDEBUG data structure:
Offset  Size    Description     (Table 03078)
 00h    WORD    register SE
 02h    WORD    register OF
 04h    WORD    register FS
 06h    WORD    register FO
 08h    WORD    register AX
 0Ah    WORD    register BX
 0Ch    WORD    register CX
 0Eh    WORD    register DX
 10h    WORD    register SI
 12h    WORD    register DI
 14h    WORD    register DS
 16h    WORD    register ES
 18h    WORD    register BP
 1Ah    WORD    register SS
 1Ch    WORD    register SP
 1Eh    WORD    register FL (flags)
 20h    WORD    register R0
 22h    WORD    register R1
 24h    WORD    register R2
 26h    WORD    register R3
 28h    WORD    register R4
 2Ah    WORD    register R5
 2Ch    WORD    register R6
 2Eh    WORD    register R7
 30h    WORD    register R8
 32h    WORD    register CS, return-address
 34h    WORD    register IP, return-address
 36h    DWORD   saved pointer to data for key <F6> (v1.60)
                saved monitor address (v1.70)
 3Ah 12 WORDs   saved register values on last popup entry (for <F8> key)
                (original register values at popup entry of MDEBUG)
                AX, BX, CX, DX, SI, DI, DS, ES, BP, SS, SP, flags
 52h 12 WORDs   saved register values on last popup exit (for <SHIFT-F8> key)
                AX, BX, CX, DX, SI, DI, DS, ES, BP, SS, SP, flags
 6Ah    DWORD   address of the DOS-invars-table
 6Eh    DWORD   address of the InDOS flag
 72h    WORD    offset of the register which is used for the segment of the
                  first monitor window
 74h    WORD    offset of the register which is used for the offset of the
                  first monitor window
 76h    WORD    name of the register which is used for the segment of the
                  first monitor segment
 78h    WORD    name of the register which is used for the offset of the first
                  monitor window
 7Ah    WORD    pseudo register 1
 7Ch    WORD    pseudo register 2
--------G-2FD103-----------------------------
INT 2F - MDEBUG command driver - EXECUTE KEY IN THE MONITOR
        AX = D103h
        BX = key code (like result of an interrupt 16h call)
        CX = cursor position
            0000h in the ASCII column of the monitor
            0001h in one of the hex fields of the monitor
        DS:SI -> MDEBUG data structure (see #03078)
        ES:DI -> actual byte in the monitor
Return: AL = FFh
        AH = return code
            00h key processed, read next key
            01h leave MDEBUG popup session
            02h leave MDEBUG popup session and automatically popup again if DOS
                  is not busy
            03h signal an error (beep)
            04h driver has redefined the key, proceed with the new key
                BX = new key code
                MDEBUG will not pass the new key to the command driver(s)
           else treat like code 00h
Note:   this function must end with a far call to the old INT 2F handler (with
          registers unchanged) if the driver does not support the key in BX.
          Otherwise, the driver must not chain to the old INT 2F.
SeeAlso: AX=D104h
--------G-2FD104-----------------------------
INT 2F - MDEBUG command driver - EXECUTE KEY IN THE INTERPRETER
        AX = D104h
        DS:SI -> MDEBUG data structure (see #03078)
Return: AL = FFh
        AH = return code
            00h key processed, read next key
            01h leave MDEBUG popup session
            02h leave MDEBUG popup session and automactically popup again if
                  DOS is not busy
            03h signal an error (beep)
            04h driver has redefined the key, proceed with the new key
                BX = new key code
                MDEBUG won't pass the new key to the command driver(s)
            05h put new command line into the input buffer
                DS:SI -> new command line (ASCIZ string, max 66 chars)
            06h process new command line
                DS:SI -> new command line (ASCIZ string, max 66 chars)
           else treat like code 00h
Note:   this function must end with a far call to the old INT 2F handler if the
          driver does not support the key in BX.  Otherwise, the driver must
          not chain to the old INT 2F.
SeeAlso: AX=D103h
--------G-2FD1-------------------------------
INT 2F - MDEBUG command driver - RESERVED FUNCTIONS
        AH = D1h
        AL = 05h-0Ah
Note:   these functions are reserved for future use
--------G-2FD110-----------------------------
INT 2F - MDEBUG command driver - GET ADDRESS OF THE OLD INT 2F
        AX = D110h
Return: DL = FFh
        ES:BX -> next program in the chain for INT 2F
        CX = code segment of this driver
        DI = offset of driver identification table (see #03079) (v1.60+)
Notes:  only called by the transient part of the driver
        must be reentrant and the driver must not chain this function to the
          old INT 2F

Format of the MDEBUG driver identification table:
Offset  Size    Description     (Table 03079)
 00h  26 BYTEs   signature "Kommandotreiber f�r MDEBUG"
                                             ^- Note: ASCII 129,German U-umlaut
 27h  12 BYTEs   name of driver, e.g. "MDHISDRV.COM"
                 each driver must have a unique name
--------G-2FD111-----------------------------
INT 2F - MDEBUG command driver - START DRIVER
        AX = D111h
Return: DL = FFh
Notes:  only called by the transient part of the driver to inform the resident
          part that it is installed
        the function must be reentrant and the driver mustn't chain this
          function to the old INT 2F
SeeAlso: AX=D101h,AX=D112h
--------G-2FD112-----------------------------
INT 2F - MDEBUG command driver - END DRIVER
        AX = D112h
Return: DL = FFh
Notes:  only called by the transient part of the driver to inform the resident
          part that it will be released after this function
        the function must be reentrant and the driver mustn't chain this
          function to the old INT 2F
SeeAlso: AX=D101h,AX=D111h
--------G-2FD1-------------------------------
INT 2F - MDEBUG command driver - RESERVED FUNCTIONS
        AH = D1h
        AL = 13h-7Fh
Note:   these functions are reserved for future use
--------G-2FD1-------------------------------
INT 2F - MDEBUG command driver - USER DEFINED FUNCTIONS
        AH = D1h
        AL = 80h-FFh
Note:   these functions are reserved for user defined features (e.g.
          communication between the transient und resident parts of the driver)
--------U-2FD200-----------------------------
INT 2F - PCL-838.EXE - INSTALLATION CHECK
        AX = D200h
Return: AL = FFh if installed??? (documented as AX = return value)
Program: PCL-838 is a resident utility for controlling a stepmotor adapter
          board by Advantec
SeeAlso: AX=D201h"PCL-838",AX=D202h"PCL-838"
--------Q-2FD200BX5144-----------------------
INT 2F - Quarterdeck RPCI - INSTALLATION CHECK
        AX = D200h
        BX = 5144h ("QD")
        CX = 4D45h ("ME")
        DX = 4D30h ("M0")
Return: AL = FFh installed
        if BX,CX,DX registers were as specified on entry:
            BX = 4D45h ("ME")
            CX = 4D44h ("MD")
            DX = 5652h ("VR")
Range:  AH=C0h to AH=FFh, selected by scanning AH=D2h-FFh, then AH=C0h-D1h
Notes:  the Quarterdeck RPCI (Resident Program Communication Interface) is
          supported by QEMM v5.0+, QRAM, MANIFEST, VIDRAM, etc.
        for AL <> 0, if the BX/CX/DX values don't match the identifier of a
          Quarterdeck product, it just chains to the previous INT 2F handler
SeeAlso: AX=D201h/BX=4849h,AX=D201h/BX=4D41h,AX=D201h/BX=4D45h
SeeAlso: AX=D201h/BX=5145h,AX=D201h/BX=5649h
--------U-2FD201-----------------------------
INT 2F - PCL-838.EXE - UNINSTALL
        AX = D201h
Return: AX = return value
SeeAlso: AX=D200h"PCL-838",AX=D202h"PCL-838"
--------m-2FD201BX4849-----------------------
INT 2F - Quarterdeck RPCI - GET QD HIMEM PRESENCE
        AX = D201h
        BX = 4849h ("HI")
        CX = 4D45h ("ME")
        DX = 4D51h ("MQ")
Return: BX = 4F4Bh ("OK")
        ES:DI -> HIMEM entry point
Range:  AH=C0h to AH=FFh, selected by scanning AH=D2h-FFh, then AH=C0h-D1h
SeeAlso: AX=D200h,AX=D201h/BX=5145h
--------m-2FD201BX4849-----------------------
INT 2F - Quarterdeck RPCI - QEMM/QRAM v5.0+ - GET HIRAM MEMORY CHAIN
        AX = D201h
        BX = 4849h ("HI")
        CX = 5241h ("RA")
        DX = 4D30h ("M0")
Return: BX = 4F4Bh ("OK")
        CX = segment of start of HIRAM chain
        DX = reserved block owner (QEMM/QRAM code segment)
Range:  AH=C0h to AH=FFh, selected by scanning AH=D2h-FFh, then AH=C0h-D1h
Note:   the HIRAM memory chain has the same format as the regular DOS 4.0
          memory chain (see #01628 at INT 21/AH=52h), except that XMS Upper
          Memory Blocks have the block header program name field set to
          "UMB"; blocks whose "owner" field is set to the reserved segment
          returned in DX are locked-out regions such as video memory and ROMs.
SeeAlso: AX=12FFh/BX=0006h,AX=D200h
--------G-2FD201BX4D41-----------------------
INT 2F U - Quarterdeck RPCI - MANIFEST v1.0+ - INSTALLATION CHECK
        AX = D201h
        BX = 4D41h ("MA")
        CX = 4E49h ("NI")
        DX = 4645h ("FE")
Return: BX = 5354h ("ST") if installed
Range:  AH=C0h to AH=FFh, selected by scanning AH=D2h-FFh, then AH=C0h-D1h
SeeAlso: AX=D200h
--------E-2FD201BX4D45-----------------------
INT 2F U - Quarterdeck RPCI - DVDOS4GX.DVR - ???
        AX = D201h
        BX = 4D45h ("ME")
        CX = 5155h ("QU")
        DX = 5044h ("PD")
Return: AL = FFh
        BX = 4F4Bh ("OK")
Range:  AH=C0h to AH=FFh, selected by scanning AH=D2h-FFh, then AH=C0h-D1h
Note:   this function is called by QEMM 6.03
        performs a variety of actions before setting return registers
SeeAlso: AX=D200h
--------m-2FD201BX5145-----------------------
INT 2F - Quarterdeck RPCI - QEMM v5.0+ - INSTALLATION CHECK
        AX = D201h
        BX = 5145h ("QE")
        CX = 4D4Dh ("MM")
        DX = 3432h ("42")
Return: BX = 4F4Bh ("OK")
        ES:DI -> QEMM API entry point (see INT 67/AH=3Fh)
Range:  AH=C0h to AH=FFh, selected by scanning AH=D2h-FFh, then AH=C0h-D1h
Note:   this call is not available under QEMM v6.00 unless Windows3 support
          has been disabled with the NW3 switch to QEMM386.SYS
SeeAlso: AX=D200h,AX=D201h/BX=4849h,INT 67/AH=3Fh
--------V-2FD201BX5649-----------------------
INT 2F u - Quarterdeck RPCI - VIDRAM v5.0+ - INSTALLATION CHECK
        AX = D201h
        BX = 5649h ("VI")
        CX = 4452h ("DR")
        DX = 414Dh ("AM")
Return: BX = 4F4Bh ("OK")
        ES:DI -> VIDRAM entry point (see #03080)
Range:  AH=C0h to AH=FFh, selected by scanning AH=D2h-FFh, then AH=C0h-D1h
SeeAlso: AX=D200h

(Table 03080)
Call VIDRAM entry point with:
        AH = 00h get status
                Return: AL = VIDRAM state (see #03081)
                        BL = extra RAM status (see #03082)
                        BH = feature flags (see #03083)
                        CL = current monitor (01h = mono, 80h = color)
                        SI = current top of memory (paragraph)
                        DI = segment of start of HiRAM chain
        AH = 01h setup
                AL = VIDRAM state (see #03081)
                BL = extra RAM status (see #03082)
                BH = feature flags (see #03083)
                CL = monitor (01h = monochrome, 80h = color)
                SI = new top of memory (paragraph)
                DI = segment of start of HiRAM chain
        AH = 02h get end address of VIDRAM code
                Return: ES:DI -> VIDRAM partial map context (see #03084,#03085)
Return: CF set on error
        CF clear if successful

(Table 03081)
Values for VIDRAM state:
 00h    off
 01h    no EGA graphics
 02h    no graphics at all

(Table 03082)
Values for VIDRAM extra RAM status:
 00h    VIDRAM does not use extra RAM
 01h    VIDRAM uses EMS as extra RAM
 02h    VIDRAM uses EGA as extra RAM

Bitfields for VIDRAM feature flags:
Bit(s)  Description     (Table 03083)
 0      override enabled
 1      mapped memory detected in A000h-B000h range
 2      top of memory not at 640K
 3      MDA detected
 4      high RAM exists in video area
 5      mapped memory detected in video area
 6-7    reserved???

Format of VIDRAM partial map context (EMS 3.2):
Offset  Size    Description     (Table 03084)
 00h    BYTE    EMS version ID (32h)
 01h    WORD    EMM handle for this entry
 03h    BYTE    number of frames
 04h    BYTE    first page frame
 05h    WORD    offset from ES to previously saved map

Format of VIDRAM partial map context (EMS 4.0):
Offset  Size    Description     (Table 03085)
 00h    BYTE    EMS version ID (40h)
 01h    WORD    mappable segment count
 03h  N WORD    mappable segments
        WORD    offset to previously saved map???
--------U-2FD202-----------------------------
INT 2F - PCL-838.EXE - EXECUTE PCL838 COMMANDS
        AX = D202h
        CX:BX -> parameter table
Return: AX = return value
SeeAlso: AX=D200h"PCL-838",AX=D201h"PCL-838"
--------R-2FD300BX4562-----------------------
INT 2F U - TeleReplica - INSTALLATION CHECK
        AX = D300h
        BX = 4562h
        CX = 2745h
        DX = serial port I/O base address??? (03F8h for v3.9)
Return: SI = segment of resident code
        AX = 251Dh
        BX = DF21h
        CX = F321h
        DX = ???
--------R-2FD3CB-----------------------------
INT 2F U - LapLink Quick Connect v6 - API
        AX = D3CBh
        CX = function
            0002h get ???
                Return: BX:AX -> ???
                        CL = ???
                        CH = ???
                        DX = ???
                        DI = COM1 I/O port???
                        SI = COM2 I/O port???
            0003h initialization???
            0004h ???
            0005h initialization???
            0006h reset/clear ???
                Return: AX = 0000h
                        ES:DI -> next byte after ??? cleared by this call
            0007h initialization???
            0008h uninstall
                Return: BX = status
                            0000h successful
                            FFFFh incomplete, stub remains in memory
Return: CX = 534Bh (except function 0002h)
Index:  uninstall;LapLink Quick Connect
--------K-2FD3D3BH00-------------------------
INT 2F - KDRIVE v2.x - INSTALLATION CHECK
        AX = D3D3h
        BH = 00h
Return: BX = 3D3Dh if installed
        CF clear if installed
            AX = driver ID??? (returns 0087h for KDRIVE.EXE and 0880h for
                  KDRIVOS2.EXE in one examined version)
Program: KDRIVE is a shareware extended German keyboard driver by Martin
          Austermeier, originally based on K3 by Martin Gerdes as published
          in c't magazine 7/1988
--------l-2FD44D-----------------------------
INT 2F - 4DOS.COM v2.1+ - API
        AX = D44Dh
        BH = function
            00h installation check
                Return: AX = 44DDh
                        BL = major version number
                        BH = minor version number
                        CX = PSP segment address for current invocation
                        DL = 4DOS shell number (0 for the first (root) shell,
                              updated each time a new copy is loaded)
            01h (internal, v2.1-3.03) terminate current copy of 4DOS
                Return: nothing
                (internal, v4.0+) ???
                Return: AX = 44DDh
                        ES:BX -> data area (see #03086)
            02h ???
                DX = ???
                Note:   v5.52 signals "unrecoverable error" and then terminates
                          with INT 21/AH=4Ch or enters a deliberate infinite
                          loop if ???
        ---v2.1-3.03 only---
            03h EXEC program
                CX:DX -> EXEC record (see #03087)
            FEh deallocate shell number (passed through to root shell)
                ???
            FFh allocate shell number (passed through to root shell)
        ---v5.52---
            03h get ???
                BL = ??? (00h/01h)
                Return: DX = current value of ???
            04h set ???
                BL = ??? (00h/01h)
                DX = new value for ???
Note:   a bug in v3.00 will crash the system if unrecognized value in BH
SeeAlso: AX=D44Eh,AX=D44Fh/BX=0000h,AX=E44Dh,INT 21/AX=4403h"DOS"
SeeAlso: INT 14/AX=7000h
Index:  installation check;4DOS|installation check;NDOS

Format of 4DOS v4.0 data area:
Offset  Size    Description     (Table 03086)
 00h  2 BYTEs   ???
 06h    WORD    XMS handle for swapping
        ???
SeeAlso: #03087

Format of 4DOS EXEC v2.1-v3.03 record:
Offset  Size    Description     (Table 03087)
 00h    WORD    offset of ASCIZ program name in same segment as EXEC record
 02h    WORD    offset of DOS commandline in same segment as EXEC record
 04h    WORD    segment of environment for child process (see INT 21/AH=26h)
SeeAlso: #03086
--------l-2FD44E-----------------------------
INT 2F C - 4DOS v3.0+ - AWAITING USER INPUT
        AX = D44Eh
---4DOS v3.01+---
        BX = condition
            0000h 4DOS is ready to display prompt
            0001h 4DOS has displayed the prompt, about to accept user input
Return: the handler must preserve SI, DI, BP, SP, DS, ES, and SS
Note:   v3.00 only makes the call corresponding to BX=0001h, does not set BX
SeeAlso: AX=D44Dh
--------K-2FD44FBX0000-----------------------
INT 2F - 4DOS v4.0+ - KSTACK.COM - INSTALLATION CHECK
        AX = D44Fh
        BX = 0000h
Return: AX = 44DDh if installed
Note:   this function is also supported by ANSIPLUS v3.01+ and K3PLUS v6.20+,
          which emulate the 4DOS and NDOS keystack
SeeAlso: AX=D44Dh,AX=D44Fh/BX=0001h,AX=E44Fh/BX=0000h
--------K-2FD44FBX0001-----------------------
INT 2F - 4DOS v4.0+ - KSTACK.COM - PLACE KEYSTROKES INTO KEYSTACK
        AX = D44Fh
        BX = 0001h
        CX = number of keystrokes (01h-FFh)
        DS:DX -> keystroke list (one word per keystroke)
Return: AX = status
            0000h successful
            nonzero failed
        BX,CX,DX destroyed
Notes:  the keystrokes are the exact values to return from subsequent calls to
          INT 16 with AH=00h,01h,10h, or 11h, with the following exceptions:
                0000h causes subfunctions 01h and 11h to indicate an empty
                      keyboard buffer
                FFFFh is followed by a word indicating the number of clock
                      ticks to delay before the next faked keystroke
        v4.00 KSTACK overwrites any unread keystrokes from the previous
          invocation, and does not range-check CX; it will overwrite memory
          following the resident portion if CX is greater than 100h.
        this function is also supported by ANSIPLUS v3.01+ and K3PLUS v6.20+,
          which emulate the 4DOS and NDOS keystack
SeeAlso: AX=D44Dh,AX=D44Fh/BX=0000h,INT 16/AH=00h,INT 21/AX=4403h"DOS"
--------G-2FD600-----------------------------
INT 2F - HEART.COM - INSTALLATION CHECK
        AX = D600h
Return: AX = 0303h (two hearts) if installed
            ES:DI -> buffer (see #03088)
Program: HEART.COM is a CPU lock-up/critical indicator utility by Mitch Davis.
Notes:  Once the host program has identified the address of the data area, it
          can change this to indicate safe/critical, alternate colours, etc.
        The entries for the color table are in char/attrib form.  Every two
          entries form a pair which is alternated between 68 times a minute.
          The first half of the table is for color videos, the second mono.
          Within each half, the first half is for the safe chars, and the
          second for the critical chars.

Format of HEART.COM buffer:
Offset  Size    Description     (Table 03088)
 00h  8 WORDs   table of colors/attributes (refer to notes above)
 10h    BYTE    flags
                bit 0: program is in critical section, so flash double
                      exclamation mark
                bit 1: program is in safe code, so flash the heart character
 11h    WORD    position of heartbeat on screen, normally 009Eh (last column
                of second line)
--------T-2FD600-----------------------------
INT 2F U - VEDIT VSWAP - INSTALLATION CHECK
        AX = D600h
Return: AL = D6h if installed
Program: VSWAP is the resident portion of VEDIT's "swapper" capability; VEDIT
          is a programmer's text editor by Greenview Data.
SeeAlso: AX=D601h,AX=D602h
--------T-2FD601-----------------------------
INT 2F U - VEDIT VSWAP - ???
        AX = D601h
        BL = subfunction number???
Return: BL = return code ???
        ES = resident portion's data??? segment
        DX = resident portion's code segment
SeeAlso: AX=D600h"VSWAP"
--------T-2FD602-----------------------------
INT 2F U - VEDIT VSWAP - EXEC PROGRAM WITH SWAP
        AX = D602h
        other registers set as for INT 21/AX=4B00h
Return: CF set on error
            AL = error code
                82h = failure due to ???
        CF clear on success
SeeAlso: AX=D600h"VSWAP",INT 21/AH=4Bh"EXEC"
--------N-2FD701BX0000-----------------------
INT 2F - Banyan VINES v4+ - GET BANV INTERRUPT NUMBER
        AX = D701h
        BX = 0000h
Return: AX = 0000h if installed
            BX = interrupt number (60h to 66h)
           nonzero not present
Note:   if AX is nonzero, VINES 3.x or earlier may be installed, thus it is
          necessary to examine the four bytes preceding the handlers for
          INT 60 through INT 66 for the string "BANV"
SeeAlso: AX=D702h,AX=D703h,AX=D704h
--------N-2FD702-----------------------------
INT 2F U - Banyan VINES v4+ - PCPRINT interface
        AX = D702h
        BX = function
        ???
Return: ???
SeeAlso: AX=D701h,AX=D703h,INT 61/AX=0005h"Banyan"
--------N-2FD703-----------------------------
INT 2F U - Banyan VINES v4+ - MAIL interface
        AX = D703h
        BX = function
        ???
Return: ???
SeeAlso: AX=D702h,AX=D704h
--------N-2FD704-----------------------------
INT 2F U - Banyan VINES v4+ - Streettalk Directory Assistance interface
        AX = D704h
        BX = function
        ???
Return: ???
SeeAlso: AX=D703h,INT 61/AX=0007h/BX=0002h"Banyan",INT 61/AX=0007h/BX=0008h
--------N-2FD800-----------------------------
INT 2F U - Novell NetWare Lite - CLIENT.EXE - INSTALLATION CHECK
        AX = D800h
Return: AL = FFh if installed
            DX = version number (0100h for v1.0, 0101h for v1.1)
            BX = data segment of resident copy
            ES:DI -> private API entry point (see #03089)
            SI = segment of resident code
SeeAlso: AX=7A00h,AX=D880h

(Table 03089)
Call CLIENT API entry point with:
        BX = function
            0000h get ???
                Return: DX = CLIENT version??? (0101h for v1.1)
                        ES:BX -> ??? data
            0001h ???
            0002h ???
            0003h ???
            0004h ???
            0005h ???
                DL = ???
                ???
                Return: ???
            0006h get module name???
                ES:DI -> 16-byte buffer
                Return: CX = ???
                        ES:DI filled with "NWLITE_CLIENT" 00h 00h 00h
            0007h ???
                DX:CX = ???
                ???
                Return: ???
            0008h ???
            0009h ???
                DL = ???
                ES:DI -> 16-byte buffer for ???
                Return: CF clear if successful
                            AX = 0000h
                            CX = 0000h
                            SI,DI destroyed
                        CF set on error
                            AX = error code 4903h
            000Ah ???
                AH = subfunction
                    00h get ???
                    01h clear/set ??? flag
                        AL = new state (00h cleared, 01h set)
                    02h set ???
                        DX = new value of ???
                Return: DX = old value of ???
            000Bh ???
                AX = ???
                ???
                Return: ???
            000Ch ???
                AX = ???
                ???
                Return: ???
            000Dh ???
                AX = ???
                ???
                Return: ???
            000Eh get original INT 17
                Return: CF clear
                        ES:BX -> original INT 17
            000Fh ???
            0010h ???
                AX = ???
                ???
                Return: ???
            0011h get ???
                Return: CF clear
                        DL = ???
            0012h get ???
                AL = index of ???
                ES:DI -> 10-byte buffer for ???
                Return: CF clear if successful
                            ES:DI buffer filled
                            AX,CX destroyed
                        CF set on error
                            AX = error code (4907h if AL out of range)
            0013h get ???
                Return: CF clear
                        DH = ???
                        DL = ???
            0014h ???
                DL = ???
                ???
                Return: CF clear if successful
                            ???
                        CF set on error
                            AX = error code 8056h
            0015h ???
                DX = ???
                Return: ES:DI -> ???
            other
                Return: CF set
                        AX = 0001h (invalid function)
--------N-2FD856-----------------------------
INT 2F U - Novell NetWare Lite v1.1 - SERVER - GET ???
        AX = D856h
Return: AX = 0001h if supported???
        BX = ??? (0004h for v1.1)
        CX = ??? (0F20h for v1.1)
        DS = segment of resident code
        ES = data segment of resident copy
Note:   this function is also supported by Personal NetWare SERVER, bundled
          with Novell DOS 7
--------N-2FD880-----------------------------
INT 2F U - Novell NetWare Lite v1.0+ - SERVER - INSTALLATION CHECK
        AX = D880h
Return: AL = FFh if installed
            DX = version number (binary, DH = major, DL = minor)
            BX = data segment of resident copy
            CL = current state (00h SERVER is disabled, 01h SERVER is active)
            ES:DI -> private API entry point (see #03090)
            SI = ??? (offset of configuration info?)
            AH may be destroyed
Note:   this function is also supported by Personal NetWare SERVER, but DI is
          not set; instead, ES:SI points at the API entry point
SeeAlso: AX=7A00h,AX=D800h,INT 2A/AX=D852h

(Table 03090)
Call SERVER API entry point with:
        BX = function
            0000h ???
                ???
                Return: ???
                Note: closes open files by calling INT 21/AH=3Eh
            0001h get connection information
                DX = connection number (0001h-max connections)
                ES:DI -> 28-byte buffer for connection information
                Return: CF clear if successful
                            ES:DI buffer filled
                        CF set on error
                            AX = FFFFh
        ---Personal NetWare only---
            0002h ???
            0003h ???
            0004h ???
            0005h ???
            0006h ???
            0007h ???
            other
                Return: CF set
                        AX = 0001h (invalid function)
--------d-2FD8C0-----------------------------
INT 2F U - Novell NLCACHE,NWCACHE - INSTALLATION CHECK
        AX = D8C0h
Return: AL = FFh if installed
            CL = cache variant (01h NLCACHEC, 02h NLCACHEX, 03h NLCACHEM)
            DH = major version??? (01h for v1.1)
            DL = minor version??? (01h for v1.1)
            ES:DI -> private API entry point (see #03091)
Program: NLCACHE is a disk cache included with NetWare Lite
SeeAlso: AX=D800h,AX=D880h

(Table 03091)
Call NLCACHE/NWCACHE API entry point with:
        BX = function
            0000h ???
                ???
                Return: CF clear if successful
                            AX = 0000h
                            ???
                        CF set on error
                            AX = error code
            0001h (NWCACHE only) ???
                ES:DI -> buffer for ???
                Return: ???
            other
                Return: CF set
                        AX = 0001h (invalid function)
--------F-2FDA00-----------------------------
INT 2F - ZyXEL ZFAX v1.x - INSTALLATION CHECK
        AX = DA00h
Return: AH = enabled state (00h = enabled, 01h = disabled)
        AL = 5Ah installed
Program: ZFAX is the bundled FAX software which comes with the ZyXEL model
          fax modems.
Note:   This function, and the other DAxxh functions, may apply only to version
          1 of the software; see AX=DB00h for the version 2 installation check
SeeAlso: AX=CBDCh,AX=DA01h,AX=DA02h,AX=DA03h,AX=DB00h
--------F-2FDA01-----------------------------
INT 2F - ZyXEL ZFAX v1.x - UNINSTALL
        AX = DA01h
Return: AL = 00h Success
             01h Failure
SeeAlso: AX=DA00h,AX=DB01h
--------F-2FDA02-----------------------------
INT 2F - ZyXEL ZFAX v.1x - DISABLE
        AX = DA02h
Return: AL = 00h
SeeAlso: AX=DA03h,AX=DB02h
--------F-2FDA03-----------------------------
INT 2F - ZyXEL ZFAX v1.x - ENABLE
        AX = DA03h
Return: AL = 00h
SeeAlso: AX=DA02h,AX=DB03h
--------G-2FDA55-----------------------------
INT 2F U - TRAP.COM - INSTALLATION CHECK
        AX = DA55h
        DL = interrupt number
        DH = ???
Return: if installed
            AH = interrupt number
            AL = ???
            ES:BX -> ???
Program: TRAP is an interrupt call tracer by Patrick Phillipot/Udo Chrosziel
Note:   a separate copy of TRAP is loaded for each interrupt to be traced; thus
          the interrupt number is part of the installation check
--------N-2FDAB2-----------------------------
INT 2F U - Beame&Whiteside BWSNMP - INSTALLATION CHECK
        AX = DAB2h
Return: AX = 00FFh if installed
            BX:CX -> MIB table
Program: BWSNMP is part of the BW-NFS package
SeeAlso: INT 62/AH=00h"ETHDEV"
--------F-2FDB00-----------------------------
INT 2F - ZyXEL ZFAX v2+ - INSTALLATION CHECK
        AX = DB00h
Return: AL = 5Bh if installed (v2.x)
            ES:BX -> configuration table???
        AX = 00DBh if installed (v3)
            ES:BX -> ZFAX configuration table (see #03092)
Program: ZFAX is the bundled FAX software which comes with the ZyXEL model
          Fax modems.
SeeAlso: AX=CBDCh,AX=DA00h,AX=DB01h,AX=DB02h,AX=DB03h

Format of ZFAX Configuration Table:
Offset  Size    Description     (Table 03092)
 00h    WORD    table version number (0300h for v3.0-v4.01)
 02h    BYTE    reserved
 03h 70 BYTEs   ZFAX working path
 49h 128 BYTEs  path to external editor
 C9h 128 BYTEs  path to external terminal emulator
149h 128 BYTEs  path to Ring Shell
1C9h 128 BYTEs  path to DOS Shell
249h 128 BYTEs  path to Data Shell
2C9h 70 BYTEs   path to Chinese font
30Fh    BYTE    printer type (see #03093)
310h    BYTE    printer port (00h = LPT1, etc.)
311h    BYTE    type of graphics adapter
                (00h auto-detect, 01h VGA, 02h EGA, 03h CGA, 04h Hercules)
312h    BYTE    display type
                (00h auto-detect, 01h LCD, 02h color, 03h mono)
313h    BYTE    scan code for ZFAX hotkey (see #00006)
314h    BYTE    shift mask for ZFAX hotkey
315h    BYTE    tone/pulse dialing (00h tone, 01h pulse)
316h    BYTE    Caller ID (00h disabled, 01h enabled)
317h    BYTE    Distinctive Ring (00h disabled, 01h enabled)
318h    BYTE    normal ring answer type (see #03094)
319h    BYTE    Ring 1 answer type (see #03094)
31Ah    BYTE    Ring 2 answer type (see #03094)
31Bh    BYTE    Ring 3 answer type (see #03094)
31Ch    BYTE    COM port for modem
31Dh    BYTE    speaker volume (00h-07h)
31Eh    BYTE    modem dial timer, seconds
31Fh    WORD    user-defined COM port I/O address
321h    BYTE    user-defined COM port IRQ number
322h 81 BYTEs   dial prefix string
373h 79 BYTEs   dial postfix string
3C2h    BYTE    ring count until automatic answer
3C3h    BYTE    retry count on busy signal
3C4h    BYTE    redial delay in seconds
3C5h    WORD    system password
3C7h    BYTE    reserved
3C8h    BYTE    voice file compression format
                00h CELP at 9600bps
                01h two-bit ADPCM at 19200bps
                02h three-bit ADPCM at 28800bps
3C9h    BYTE    voice system: DTMF 0 action (see #03095)
3CAh    BYTE    voice system: DTMF 1 action
3CBh    BYTE    voice system: DTMF 2 action
3CCh    BYTE    voice system: DTMF 3 action
3CDh    BYTE    voice system: DTMF 4 action
3CEh    BYTE    voice system: DTMF 5 action
3CFh    BYTE    voice system: DTMF 6 action
3D0h    BYTE    voice system: DTMF 7 action
3D1h    BYTE    voice system: DTMF 8 action
3D2h    BYTE    voice system: DTMF 9 action (see #03095)
3D3h    WORD    reserved
3D5h 25 BYTEs   local FAX ID to display on page header
3EEh 20 BYTEs   local FAX ID sent to remote FAX
402h    BYTE    FAX page size
                00h A4 (210x297mm)
                01h B4 (250x353mm)
                02h A3 (297x420mm)
403h    BYTE    FAX resolution
                00h normal (3.85 pixels/mm)
                01h high (7.7 pixels/mm)
404h    BYTE    FAX coding scheme
                00h 1-D, modified Huffman coding
                01h 2-D, modified READ coding
405h    BYTE    left margin for text in millimeters
406h    BYTE    vertical insertion for text in mm (0-20)
407h    BYTE    horizontal insertion in mm (0-20)
408h    BYTE    maximum text lines per page
409h    BYTE    text type (00h ASCII, 01h WordStar-formatted)
40Ah    BYTE    PCX image resize (00h disabled, 01h enabled)
40Bh    BYTE    AutoPrint (00h disabled, 01h enabled)
40Ch    BYTE    cover page (00h disabled, 01h enabled)
40Dh 81 BYTEs   cover page logo filename
45Eh 65 BYTEs   cover page sender name
49Fh    BYTE    print capture (00h disabled, 01h enabled)
4A0h    BYTE    send immediately (00h disabled, 01h enabled)
4A1h    BYTE    print capture printer port
4A2h    BYTE    print capture timer in seconds
4A3h    BYTE    scan code for print capture hotkey (see #00006)
4A4h    BYTE    shift mask for print capture hotkey
4A5h    BYTE    DataShell type
                00h internal Zmodem, 01h Data Shell, 02h disable
4A6h    BYTE    video I/O type
                00h auto-detect, 01h use BIOS, 02h direct writes
4A7h    BYTE    call transfer digits (0-9)
4A8h    WORD    voice recorder maximum time in seconds (0-999)

(Table 03093)
Values for ZFAX printer type:
 00h    EPSON FX (9 pins)
 01h    EPSON LQ (24 pins)
 02h    HP Laser Jet II, letter size
 03h    HP Laser Jet II, legal size
 04h    HP Laser Jet II, A4 size
 05h    HP Laser Jet III, letter size
 06h    HP Laser Jet III, legal size
 07h    HP Laser Jet III, A4 size
SeeAlso: #03092

(Table 03094)
Values for Ring Answer Type:
 00h    voice system
 01h    FAX only
 02h    Data Shell
 03h    Ring Shell
 04h    DOS Shell
 05h    ignore
SeeAlso: #03092

(Table 03095)
Values for DTMF action:
 00h    none
 01h    page operator
 02h    FaxBack
 03h    announcement
 04h    call transfer
 05h    receive FAX
 06h    receive data
 07h    voice mailbox
 08h    DOS Shell Out
 09h    Data Shell Out
SeeAlso: #03092
--------U-2FDB00-----------------------------
INT 2F U - WINGO.COM - INSTALLATION CHECK
        AX = DB00h
Return: AX = FFFFh if installed
        CX = 5749h ('WI') if installed
        DX = 4E47h ('NG') if installed
            ES = segment of resident code
Program: WINGO.COM is TSR for starting Windows programs from DOS
          prompt (together with companion Windows program
          WINSTART.EXE) written by Douglas Boling, contributing editor of
          PC Magazine
Range:  AH=DBh to AH=FFh, selected by scanning for a free multiplex number
SeeAlso: AX=DB01h"WINGO",AX=DB02h"WINGO",AX=DB03h"WINGO",AX=DB04h"WINGO"
SeeAlso: AX=DB05h"WINGO",AX=DB06h"WINGO"
--------F-2FDB01-----------------------------
INT 2F - ZyXEL ZFAX v2+ - UNINSTALL
        AX = DB01h
Return: AX = status
            0000h successful
            0001h ZFAX is busy
            0002h another program resident above ZFAX
Note:   this function unhooks the vectors taken by the ZFAX TSR if they have
          not been hooked by other TSRs and releases the TSR's memory
        ZFAX v2.x crashes the contributor's machine when this function is
          called
SeeAlso: AX=DA01h,AX=DB00h"ZFAX",AX=DB02h"ZFAX"
--------U-2FDB01-----------------------------
INT 2F U - WINGO.COM - SET CALLBACK FUNCTION POINTER
        AX = DB01h
        CX:DX -> new callback function
Return: AX = 0000h
        CX:DX -> end of resident code (stack ???)
Desc:   the callback function is used for WINGO <-> WINSTART communication
SeeAlso: AX=DB00h"WINGO",AX=DB02h"WINGO",AX=DB03h"WINGO",AX=DB04h"WINGO"
SeeAlso: AX=DB05h"WINGO",AX=DB06h"WINGO"
--------F-2FDB02-----------------------------
INT 2F - ZyXEL ZFAX v2.x - DISABLE
        AX = DB02h
Return: AL = 00h
SeeAlso: AX=DA02h,AX=DB00h"ZFAX",AX=DB01h"ZFAX",AX=DB03h"ZFAX"
--------U-2FDB02-----------------------------
INT 2F U - WINGO.COM - RESET CALLBACK FUNCTION POINTER
        AX = DB02h
Return: AX = 0000h
Desc:   the callback function is used for WINGO <-> WINSTART communication
SeeAlso: AX=DB00h"WINGO",AX=DB01h"WINGO",AX=DB03h"WINGO",AX=DB04h"WINGO"
SeeAlso: AX=DB05h"WINGO",AX=DB06h"WINGO"
--------F-2FDB03-----------------------------
INT 2F - ZyXEL ZFAX v2.x - ENABLE
        AX = DB03h
Return: AL = 00h
SeeAlso: AX=DA03h,AX=DB00h"ZFAX",AX=DB02h"ZFAX"
--------U-2FDB03-----------------------------
INT 2F U - WINGO.COM - SET ??? FLAG
        AX = DB03h
Return: AX = 0000h
SeeAlso: AX=DB00h"WINGO",AX=DB04h"WINGO",AX=DB05h"WINGO",AX=DB06h"WINGO"
--------U-2FDB04-----------------------------
INT 2F U - WINGO.COM - RESET ??? FLAG
        AX = DB04h
Return: AX = 0000h
SeeAlso: AX=DB00h"WINGO",AX=DB03h"WINGO",AX=DB05h"WINGO",AX=DB06h"WINGO"
--------U-2FDB05-----------------------------
INT 2F U - WINGO.COM - GET ??? FLAG
        AX = DB05h
Return: AX = 0000h
        DX = unknown flag - 0 or 1
Program: WINGO.COM is TSR for starting Windows programs from DOS
          prompt (together with companion Windows program
          WINSTART.EXE) written by Douglas Boling, contributing editor of
          PC Magazine
SeeAlso: AX=DB00h"WINGO",AX=DB03h"WINGO",AX=DB04h"WINGO"
--------U-2FDB06-----------------------------
INT 2F U - WINGO.COM - CALL CALLBACK FUNCTION
        AX = DB06h
Return: AX = return value of INT 2F/AX=1685h
Note:   uses Windows service INT 2F/AX=1685h (SWITCH VMs AND CALLBACK) to
          call the callback function previously set by AX=DB01h
        used for WINGO <-> WINSTART communication
SeeAlso: AX=1685h, AX=DB00h"WINGO",AX=DB01h"WINGO",AX=DB02h"WINGO",
SeeAlso: AX=DB03h"WINGO",AX=DB04h"WINGO",AX=DB05h"WINGO"
--------F-2FDB10-----------------------------
INT 2F - ZyXEL ZFAX v3+ - EXECUTE ZFAX MAIN MENU
        AX = DB10h
SeeAlso: AX=DB00h"ZFAX",AX=DB11h"ZFAX"
--------F-2FDB11-----------------------------
INT 2F - ZyXEL ZFAX v3+ - SEND FAX
        AX = DB11h
        DS:SI -> filename including path (max 128 characters)
        DS:BX -> remote FAX number
Return: AX = status (see #03096)
SeeAlso: AX=DB00h"ZFAX",AX=DB12h,AX=DB13h,AX=DB14h,AX=DB15h,AX=DB20h,AX=DB21h

(Table 03096)
Values for ZFAX status:
 00h    OK
 01h    invalid DOS function
 02h    file not found
 03h    path not found
 04h    no file handle available
 05h    access denied by DOS
 06h    invalid handle
 07h    disk full
 10h    printer error
 11h    no graphics font
 12h    no ZFAX font
 20h    DCD dropped while sending
 21h    not ZyXEL modem
 22h    busy
 23h    no response from COM port
 24h    no carrier
 25h    no dial tone
 26h    no answer
 27h    no response
 28h    failed to send FAX
 30h    user aborted
 40h    critical error on disk
 50h    parameter error
--------F-2FDB12-----------------------------
INT 2F - ZyXEL ZFAX v3+ - PRINT FAX
        AX = DB12h
        DS:SI -> filename, including path (max 128 characters)
Return: AX = status (see #03096)
SeeAlso: AX=DB11h,AX=DB13h,AX=DB14h
--------F-2FDB13-----------------------------
INT 2F - ZyXEL ZFAX v3+ - CONVERT FAX
        AX = DB13h
        DS:SI -> source filename, including path (max 128 characters)
        DS:BX -> destination filename, including path (max 80 characters)
        CX = destination file format
            00h FAX, 01h PCX, 02h TIFF, 03h PRN
Return: AX = status (see #03096)
SeeAlso: AX=DB11h,AX=DB12h,AX=DB14h,AX=DB22h
--------F-2FDB14-----------------------------
INT 2F - ZyXEL ZFAX v3+ - VIEW FAX
        AX = DB14h
        DS:SI -> source filename, including path (max 128 characters)
Return: AX = status (see #03096)
SeeAlso: AX=DB11h,AX=DB12h,AX=DB14h
--------F-2FDB15-----------------------------
INT 2F - ZyXEL ZFAX v4.01 - SEND FAX WITH LOGO AND SIGNATURE
        AX = DB15h
        DS:SI -> source filename, including path (max 128 characters)
        DS:BX -> remote FAX number
        DS:CX -> Logo filename
        DS:DX -> Signature filename
Return: AX = status (see #03096)
SeeAlso: AX=DB00h"ZFAX",AX=DB11h
--------F-2FDB16-----------------------------
INT 2F - ZyXEL ZFAX v4.01 - QUOTE PREVIOUS STATUS
        AX = DB16h
Return: DX:AX -> previous receive state transaction log (see #03097)
        BX = type (00h incoming FAX, 01h incoming data, 02h incoming voice)
SeeAlso: AX=DB00h"ZFAX",AX=DB11h,AX=DB17h

Format of ZFAX transaction log receive state:
Offset  Size    Description     (Table 03097)
 00h    WORD    year
 02h    WORD    date
 04h    WORD    time
 06h    WORD    extension number
 08h    WORD    type: 00h incoming FAX, 01h outgoing FAX, 02h voice message
 0Ah    WORD    status: 00h normal, 01h remote delete
 0Ch 125 BYTEs  filename
 89h 24 BYTEs   caller ID
 A1h 20 BYTEs   FAX number
 B5h 20 BYTEs   remote FAX ID
 C9h    WORD    error code
 CBh    WORD    connection direction (00h transmit, 01h receive)
 CDh    BYTE    connection time minutes
 CEh    BYTE    connection time seconds
 CFh    BYTE    ???
 D0h    WORD    connection speed (24, 48, 72, 96, 12, 144)
 D2h    WORD    connection page size (A4, B4, A3)
 D4h    WORD    connection coding scheme (1-DN, 1-DH, 2-DN, 2-DH)
 D6h    WORD    page count
--------F-2FDB17-----------------------------
INT 2F - ZyXEL ZFAX v4.01 - BEGIN RECEIVING INCOMING CALL
        AX = DB17h
Return: AX = status (0000h successful, 0001h unable to start at this time)
SeeAlso: AX=DB00h"ZFAX"
--------F-2FDB18-----------------------------
INT 2F - ZyXEL ZFAX v4.01 - SCHEDULE CALL
        AX = DB18h
        DS:SI -> schedule data (see #03097)
Return: AX = status (see #03096)
SeeAlso: AX=DB00h"ZFAX"
--------F-2FDB20-----------------------------
INT 2F - ZyXEL ZFAX v3+ - POLL FAX
        AX = DB20h
        DS:SI -> remote FAX number
Return: AX = status (see #03096)
SeeAlso: AX=DB11h,AX=DB21h
--------F-2FDB21-----------------------------
INT 2F - ZyXEL ZFAX v3+ - SEND VOICE
        AX = DB21h
        DS:SI -> filename including path (max 128 characters)
        DS:BX -> remote phone number
Return: AX = status (see #03096)
SeeAlso: AX=DB11h,AX=DB20h,AX=DB22h,AX=DB23h,AX=DB24h
--------F-2FDB22-----------------------------
INT 2F - ZyXEL ZFAX v3+ - CONVERT VOICE FILE
        AX = DB22h
        DS:SI -> source filename, including path (max 128 characters)
        DS:BX -> destination filename, including path (max 80 characters)
        CX = destination format
            00h two-bit ADPCM, 01h three-bit ADPCM, 02h VOC
Return: AX = status (see #03096)
SeeAlso: AX=DB13h,AX=DB20h,AX=DB21h,AX=DB23h
--------F-2FDB23-----------------------------
INT 2F - ZyXEL ZFAX v3+ - RECORD VOICE FILE
        AX = DB23h
        DS:SI -> destination filename, including path (max 128 characters)
        CX = recording channel (0 = telephone line, 1 = microphone/speaker)
        DX = voice file format
            00h CELP, 01h two-bit ADPCM, 02h three-bit ADPCM
Return: AX = status (see #03096)
SeeAlso: AX=DB21h,AX=DB22h,AX=DB24h
--------F-2FDB24-----------------------------
INT 2F - ZyXEL ZFAX v3+ - PLAY VOICE FILE
        AX = DB24h
        DS:SI -> name of voice file, including path (max 128 characters)
        CX = playback channel (0 = telephone line, 1 = microphone/speaker)
Return: AX = status (see #03096)
SeeAlso: AX=DB21h,AX=DB22h,AX=DB24h
--------F-2FDB25-----------------------------
INT 2F - ZyXEL ZFAX v3+ - ANSWER MODEM WITH VOICE SYSTEM
        AX = DB25h
Return: AX = status (see #03096)
SeeAlso: AX=DB21h,AX=DB22h,AX=DB26h,AX=DB27h,AX=DB28h
--------F-2FDB26-----------------------------
INT 2F - ZyXEL ZFAX v3+ - DIAL PHONE
        AX = DB26h
        DS:SI -> remote phone number
Return: AX = status (see #03096)
SeeAlso: AX=DB25h
--------F-2FDB27-----------------------------
INT 2F - ZyXEL ZFAX v3+ - RECEIVE FAX - ANSWER MODEM AND SET TO FAX MODE
        AX = DB27h
Return: AX = status (see #03096)
SeeAlso: AX=DB25h,AX=DB28h
--------F-2FDB28-----------------------------
INT 2F - ZyXEL ZFAX v3+ - RECEIVE FAX DATA - ANSWER MODEM IN MULTI-AUDIO MODE
        AX = DB28h
Return: AX = status (see #03096)
SeeAlso: AX=DB25h,AX=DB27h,AX=DB41h
--------F-2FDB40-----------------------------
INT 2F - ZyXEL ZFAX v3+ - INTERNAL TERMINAL
        AX = DB40h
Return: AX = status (see #03096)
SeeAlso: AX=DB00h
--------F-2FDB41-----------------------------
INT 2F - ZyXEL ZFAX v3+ - SEND DATA - DIAL NUMBER AND UPLOAD FILE WITH ZMODEM
        AX = DB41h
        DS:SI -> source file name, including path (max 128 characters)
        DS:BX -> remote data number
Return: AX = status (see #03096)
SeeAlso: AX=DB00h,AX=DB28h
--------K-2FDC00-----------------------------
INT 2F - GOLD.COM - INSTALLATION CHECK
        AX = DC00h
Return: AL = state
            00h not installed
            FFh installed
Program: GOLD is a TSR by Bob Eager which makes the NumLock key return the
          code for F1; the purpose is to improve Kermit's VTxxx emulation
--------K-2FDC01-----------------------------
INT 2F - GOLD.COM - GET STATE
        AX = DC01h
Return: AL = status
            00h off
            01h on
SeeAlso: AX=DC00h,AX=DC02h
--------K-2FDC02-----------------------------
INT 2F - GOLD.COM - SET STATE
        AX = DC02h
        DL = new state
            00h off
            01h on
Return: AL = 00h (OK)
SeeAlso: AX=DC01h
--------t-2FDD-------------------------------
INT 2F - CappaCom programs - API
        AH = DDh
        AL = 00h general installation check
            Return: AL = FFh if any CappaCom programs are resident
        AL = FEh get info
            Return: ES:BX -> TSR info list (see #03098)
        AL = program identifier
            BH = function
                FDh get version
                    Return: BX = version
                FFh installation check
                    Return: AL = FFh if installed
                                BX = version
                                ES = segment of resident code
                others vary by program
Return: AL = status
            bit 7 set on error
            AL = 81h unknown function
Note:   CappaCom was originally SoftCom but changed its name due to a trademark
          conflict
Index:  installation check;SoftCom programs
Index:  installation check;CappaCom programs

Format of CappaCom TSR info list:
Offset  Size    Description     (Table 03098)
 00h  9 BYTEs   blank-padded ASCIZ program name
 09h    BYTE    program ID
 0Ah    WORD    program's PSP segment
 0Ch    WORD    program version (major in high byte)
 0Eh    DWORD   pointer to next item in info list or 0000h:0000h
 12h    BYTE    number of interrupts hooked
 13h  5 BYTEs   interrupt numbers hooked by program
 18h  8 BYTEs   reserved
----------2FDD-------------------------------
INT 2F - MIXFIX.EXE - API
        AH = DDh
        AL = function
            00h installation check
                Return: AX = 00DDh if installed
                            BX = version (BH = major, BL = minor)
            41h/61h get From: address
                Return: AX = 0001h
                        ES:BX -> ASCIZ 4d address of mail sender ("1:2/3.4")
            49h/69h get To: address
                Return: AX = 0001h
                        ES:BX -> ASCIZ 4d address of recipient ("1:2/3.4")
            4Ah/6Ah get subject of mail
                Return: AX = 0001h
                        ES:BX -> ASCIZ subject of handled mail
            4Dh/6Dh get mail name
                Return: AX = 0001h
                        ES:BX -> ASCIZ full name of current mail file
            4Eh/6Eh get From: field
                Return: AX = 0001h
                        ES:BX -> ASCIZ From: field of mail (mail sender's name)
Program: MIXFIX by "KIV without Co" is a FidoNet mail robot which may execute
          other programs for mail handling.  The called programs may use the
          services described here to retrieve information about the mail being
          handled.
Index: installation check;MIXFIX.EXE
--------d-2FDD--BX7844-----------------------
INT 2F - xDISK v3.32+ - INSTALLATION CHECK
        AH = DDh
        BX = 7844h ('xD')
        CX = 4953h ('IS')
        DX = 4B3Fh ('K?')
        AL = desired drive (01h-1Ah) or 00h to check for xDISK on any drive
        ES:DI -> 25-byte data buffer (see #03099)
Return: AX = DDFFh if installed (on specified drive if AL nonzero on entry)
           BX = 87BBh
           DX = B4C0h
           ES:DI buffer filled
        CX,CF destroyed
SeeAlso: INT 21/AX=4404h"xDISK",INT 21/AX=4405h"xDISK"

Format of xDISK data buffer:
Offset  Size    Description     (Table 03099)
 00h    DWORD   pointer to ASCIZ driver signature "xDISK unit: X"
 04h    BYTE    flag: 01h if disk linked to DOS, 00h if unlinked
 05h    BYTE    flag: 01h if write protected, 00h if not
 06h    BYTE    flag: 01h if root directory full, 00h if not
 07h    BYTE    flag: 01h if free space uncompacted, 00h if compacted
 08h    BYTE    resizing state: 00h not resizable, 01h resized, 80h resizable
 09h    BYTE    flag: 01h inelastic resizable disk, 00h elastic
 0Ah  2 BYTEs   reserved
 0Ch    BYTE    flag: 01h collapsed disk, 00h not collapsed
 0Dh    BYTE    flag: 01h using all EMS, 00h some EMS free
 0Eh    BYTE    flag: 01h password enabled, 00h disabled
 0Fh    BYTE    flag: 01h password audio feedback, 00h no feedback
 10h    BYTE    flag: 01h password video feedback, 00h no feedback
 11h    BYTE    flag: 01h confirm changes, 00h no confirmation
 12h    BYTE    flag: 01h terse display, 00h verbose display
 13h    BYTE    flag: 01h click speaker on disk access, 00h no click
 14h    BYTE    flag: 01h flash icon on disk access, 00h no icon flash
 15h    BYTE    FAT entry size: 00h 12-bit, FFh 16-bit
 16h    WORD    count of open files in RAM disk
 18h    BYTE    unused
--------N-2FDE00BL00-------------------------
INT 2F U - Novell Netware - RPRINTER, NPRINTER - INSTALLATION CHECK
        AX = DE00h
        BL = 00h
Return: AL = FFh If Rprinter/Nprinter Installed
        BX -> Program Segment Prefix N/Rprinter.exe
--------Q-2FDE00BX4456-----------------------
INT 2F - DESQview v2.26+ External Device Interface - INSTALLATION CHECK
        AX = DE00h
        BX = 4456h ("DV")
        CX = 5844h ("XD")
        DX = 4931h ("I1")
Return: AL = FFh if installed (even if other registers do not match)
        if BX,CX, and DX were as specified on entry,
            BX = 4845h ("HE")
            CX = 5245h ("RE")
            DX = 4456h ("DV")
Range:  AH=C0h to AH=FFh, selected by scanning AH=DEh-FFh, then AH=C0h-DDh
Note:   the XDI handler should not issue any DOS or BIOS calls, nor should it
          issue DESQview API calls other than those allowed from hardware ints
SeeAlso: AX=DE02h,INT 15/AX=5400h
--------Q-2FDE01-----------------------------
INT 2F - DESQview v2.26+ External Device Interface - DRIVER CUSTOM SUBFUNCTION
        AX = DE01h
        BX = driver ID
        other registers as needed by driver
Notes:  XDI drivers should pass this call through to previous handler if ID
          does not match
        DESQview never calls this function
--------Q-2FDE01BX4450-----------------------
INT 2F U - Quarterdeck QDPMI.SYS v1.0 - INSTALLATION CHECK
        AX = DE01h
        BX = 4450h ("DP")
        CX = 4D49h ("MI")
        DX = 3039h ("09")
Return: AL = FFh if installed
            BX = 4D42h ("MB")
            CX = 4921h ("I!")
            DX = 8F4Fh
            ES:DI -> filename of DPMI host overlay
InstallCheck:   test for the existence of the character device QDPMI$$$
SeeAlso: INT 2F/AX=1687h,INT 31/AX=0000h
Index:  installation check;QDPMI
--------U-2FDE01BX5242-----------------------
INT 2F - DESQview v2.26+ XDI - CUSTOM SUBFUNCTION, Ralf Brown's XDI drivers
        AX = DE01h
        BX = 5242h ("RB")
        CX:DX = program identifier
                656F7000h ("eop",0) for DVeop
Return: AX = 5242h ("RB") if installed
            ES:BX -> data or entry point (see #03100)
            CX = version number (CH = major, CL = minor)

(Table 03100)
Call DVeop entry point with:
        ES:DI -> callback address or 0000h:0000h to remove callback
Return: AX = status
            0000h failed (callback table full or attempted to remove non-
                  existent callback)
            0001h successful
                ES:DI -> chaining address
        BX,CX,DX destroyed
Notes:  the callback function is called with a simulated interrupt when the
          DESQview window containing it is closed; it should perform all
          necessary cleanup and then perform a FAR jump to the chaining address
          or an IRET if the chaining address is 0000h:0000h
        if the program wishes to remove itself before the window is closed, it
          should call the DVeop entry point with the previously returned
          chaining address and ignore the returned chaining address.
--------U-2FDE01BX7474-----------------------
INT 2F - DESQview v2.26+ XDI - CUSTOM SUBFUNCTION, DVTXDI.COM
        AX = DE01h
        BX = 7474h
        CL = function
            00h installation check
                Return: AL = FFh
            01h get process handle
                DX = keys on Open Window menu (DL = first, DH = second)
                Return: AX = process handle or 0000h if not running
            02h (v1.3+) set TMAN handle
                DX = TMAN process handle
            03h (v1.3+) set open keys to ignore on next CL=01h call
                DX = keys on Open Window menu (DL = first, DH = second)
Return: BX = 4F4Bh ("OK")
        DL destroyed
Note:   DVTXDI is distributed as part of the shareware products DVTree (DOS
         shell/DESQview process manager) and DVTMAN by Mike Weaver
Index:  installation check;DVTXDI
--------U-2FDE01BX7575-----------------------
INT 2F - DESQview v2.26+ XDI - CUSTOM SUBFUNCTION, DVSIXDI.COM
        AX = DE01h
        BX = 7575h
        CX = function
            0000h installation check
                Return: AX = 00FFh if installed
            0001h turn on notification (currently unused)
                Return: AX = 0001h
            0002h turn off notification (currently unused)
                Return: AX = 0001h
            0003h get process information
                Return: AX = status
                            0000h failed
                            0001h successful
                                BX = last instantaneous time slice
                                    in 1/100s (v1.10)
                                    in 1/18s (v1.11+)
                                CX = number of processes
                                DX = number of "(starting)" records (v2.00+)
                                SI = number of records in process info array
                                      (v2.00+) (always 15 for v1.x)
                                ES:DI -> process info array (see #03101,#03102)
            0004h get version
                Return: AH = major version
                        AL = minor version
            0005h (v1.10+) get time since DESQview started
                Return: DX:AX = 1/100s since DV start (v1.10)
                        DX:AX = 1/18s since DV start (v1.11+)
            0006h (v1.10+) get number of task switches
                Return: DX:AX = total task switches
                        CX = task switches in last instantaneous interval
Notes:  DVSIXDI is part of the DVSI (DESQview System Information) package by
          Daniel J. Bodoh
        for v1.00, function 0003h allocates common memory, which the caller
          must deallocate after reading the process information; only the
          currently used records are placed in the buffer
        for v1.10+, function 0003h merely returns a pointer to the internal
          array of process information; the caller should make a copy of the
          array while inside a critical section (see INT 15/AX=101Bh).  Only
          those records with bit 7 of the first byte set are valid.
Index:  installation check;DVSIXDI

Format of DVSIXDI v1.00 information for one process:
Offset  Size    Description     (Table 03101)
 00h    BYTE    flags
                bit 7: process slot is valid
 01h    WORD    offset into DESQVIEW.DVO of program's record if started from
                  Open Windows menu, else undefined
 03h    WORD    Switch Windows window number
 05h    WORD    segment of process handle
 07h    WORD    number of tasks owned by process
 09h    WORD    mapping context of process (see #00416 at INT 15/AX=1016h)
 0Bh    DWORD   hook for other programs

Format of DVSIXDI v1.10-v2.00 information for one process:
Offset  Size    Description     (Table 03102)
 00h    BYTE    process flags (see #03103)
 01h    WORD    Open Window keys
 03h    WORD    Switch Windows number
 05h    WORD    segment of process handle
 07h    WORD    number of tasks for process
 09h    WORD    process mapping context
 0Bh    DWORD   time process started (relative to start of DESQview)
 0Fh    DWORD   time process last got CPU (relative to start of DESQview)
 13h    DWORD   time process last gave up CPU (relative to start of DESQview)
 17h    DWORD   total CPU time since process started
 1Bh    DWORD   CPU time at start of current instantaneous interval
 1Fh    DWORD   CPU time in current instantaneous interval
 23h    DWORD   hook for other programs
Note:   all times are in 1/100s for v1.10, in 1/18s for v1.11+

Bitfields for DVSIXDI process flags:
Bit(s)  Description     (Table 03103)
 7      valid record
 6      (v2.00+) record is allocated; if bit 7 clear, process is "(starting)"
          and only offsets 01h and 09h are valid
 5      (v2.00+) this app currently owns the CPU
 4      reserved (0)
 3      DESQview system task
 2      reserved (0)
 1      task has keyboard (currently unused)
 0      task swapped out (currently unused)
--------Q-2FDE01BXFFFE-----------------------
INT 2F U - DESQview v2.26+ XDI - DVXMS.DVR - ???
        AX = DE01h
        BX = FFFEh
        CX = 4D47h ("MG")
        DX = 0052h (0,"R")
Return: AL = FFh
        DX = 584Dh
--------Q-2FDE02-----------------------------
INT 2F C - DESQview v2.26+ External Dev Interface - DV INITIALIZATION COMPLETE
        AX = DE02h
        BX = mapping context of DESQview
        DX = handle of DESQview system task
Note:   driver should pass this call to previous handler after doing its work
SeeAlso: AX=DE03h,AX=DE0Fh,INT 15/AX=5400h
--------Q-2FDE03-----------------------------
INT 2F C - DESQview v2.26+ External Dev Interface - DV TERMINATION
        AX = DE03h
        BX = mapping context of DESQview
        DX = handle of DESQview system task
Notes:  driver should pass this call to previous handler before doing its work
        DESQview makes this call when it is exiting, but before unhooking any
          interrupt vectors
SeeAlso: AX=DE02h,AX=DE0Fh,INT 15/AX=5407h
--------Q-2FDE04-----------------------------
INT 2F C - DESQview v2.26+ External Dev Interface - ADD PROCESS
        AX = DE04h
        BX = mapping context of new process (see #00416 at INT 15/AX=1016h)
        DX = handle of process
Return: nothing
Notes:  XMS XDI handler (installed by default) allocates a 22-byte record
          (see #03104) from "common" memory to control access to XMS memory
        all DOS, BIOS, and DV API calls are valid in handler
        driver should pass this call to previous handler after processing it
SeeAlso: AX=DE05h,AX=DE06h,INT 15/AX=5401h

Format of XMS XDI structure:
Offset  Size    Description     (Table 03104)
 00h    DWORD   pointer to 10-byte record???
 04h    DWORD   pointer to next XMS XDI structure
 08h    WORD    mapping context
 0Ah    BYTE    ???
 0Bh  5 BYTEs   XMS entry point to return for INT 2F/AX=4310h"XMS"
                (FAR jump to next field)
 10h  6 BYTEs   FAR handler for XMS driver entry point
                (consists of a FAR CALL followed by RETF)
--------Q-2FDE05-----------------------------
INT 2F C - DESQview v2.26+ External Dev Interface - REMOVE PROCESS
        AX = DE05h
        BX = mapping context of process (see #00416 at INT 15/AX=1016h)
        DX = handle of last task in process
Return: nothing
Notes:  XMS XDI handler releases the structure allocated by AX=DE04h
        driver should pass this call to previous handler before processing it
        all DOS, BIOS, and DV API calls except those generating a task switch
          are valid in handler
SeeAlso: AX=DE04h,AX=DE07h,INT 15/AX=5402h
--------Q-2FDE06-----------------------------
INT 2F C - DESQview v2.26+ External Dev Interface - CREATE TASK
        AX = DE06h
        BX = mapping context of process containing task
        DX = handle of new task
Notes:  driver should pass this call to previous handler after processing it
        all DOS, BIOS, and DV API calls are valid in handler
--------Q-2FDE07-----------------------------
INT 2F C - DESQview v2.26+ External Dev Interface - TERMINATE TASK
        AX = DE07h
        BX = mapping context of process containing task
        DX = handle of task
Notes:  driver should pass this call to previous handler before processing it
        all DOS, BIOS, and DV API calls except those generating a task switch
          are valid in handler
SeeAlso: AX=DE04h,AX=DE06h,AX=DE10h
--------Q-2FDE08-----------------------------
INT 2F C - DESQview v2.26+ External Dev Interface - SAVE STATE
        AX = DE08h
        BX = mapping context of task being switched from
              (see #00416 at INT 15/AX=1016h)
        DX = handle of task being switched from
Notes:  invoked prior to task swap, interrupts, etc
        driver should pass this call to previous handler after processing it
SeeAlso: AX=DE09h,INT 15/AX=5403h,INT 15/AX=DE27h
--------Q-2FDE09-----------------------------
INT 2F C - DESQview v2.26+ External Dev Interface - RESTORE STATE
        AX = DE09h
        BX = mapping context of task being switched to
              (see #00416 at INT 15/AX=1016h)
        DX = handle of task being switched to
Notes:  state is restored except for interrupts
        driver should pass this call to previous handler before processing it
SeeAlso: AX=DE08h,INT 15/AX=5404h,INT 15/AX=DE27h
--------Q-2FDE0A-----------------------------
INT 2F C - DESQview v2.26+ External Dev Interface - CHANGE KEYBOARD FOCUS
        AX = DE0Ah
        BX = mapping context of task receiving focus
        DX = handle of running task
Notes:  driver should pass this call to previous handler before processing it
        this call often occurs inside a keyboard interrupt
        DV 2.42 does not provide this call to XDI handlers running inside a
          window; instead, it directly calls the INT 2F handler which was
          active at the time DV started
SeeAlso: INT 15/AX=DE26h,INT 15/AX=DE2Fh
--------Q-2FDE0B-----------------------------
INT 2F C - DESQview v2.26+ External Dev Interface - DVP PROCESSING COMPLETE
        AX = DE0Bh
        BX = mapping context of DESQview system task
        CX = number of system memory paragraphs required for the use of all
              XDI drivers (DV will add this to system memory in DVP buffer)
        DX = handle of DESQview system task
        SI = mapping context of new process if it starts
        ES:DI -> DVP buffer
Return: CX incremented as needed
Notes:  once DV invokes this function, the DVP buffer contents may be changed
        driver should pass this call to previous handler before processing it
--------Q-2FDE0C-----------------------------
INT 2F C - DESQview v2.26+ External Dev Interface - SWAP OUT PROCESS
        AX = DE0Ch
        BX = mapping context of task being swapped out
              (see #00416 at INT 15/AX=1016h)
        DX = handle of DESQview system task
Note:   driver should pass this call to previous handler after processing it
--------Q-2FDE0D-----------------------------
INT 2F C - DESQview v2.26+ External Dev Interface - SWAP IN PROCESS
        AX = DE0Dh
        BX = mapping context of process just swapped in
              (see #00416 at INT 15/AX=1016h)
        DX = handle of DESQview system task
Note:   driver should pass this call to previous handler before processing it
--------Q-2FDE0E-----------------------------
INT 2F C - DESQview v2.26+ External Dev Interface - DVP START FAILED
        AX = DE0Eh
        BX = mapping context of DESQview system task
        DX = handle of DESQview system task
        SI = mapping context of failed process (same as for call to AX=DE0Bh)
Note:   driver should pass this call to previous handler after processing it
--------Q-2FDE0F-----------------------------
INT 2F C - DESQview v2.50+ External Dev Interface - INITIALIZE DV
        AX = DE0Fh
Note:   DESQview 2.50+ calls this function just before it completes its
          initialization.  At the time of the call, DESQview has not yet
          changed any interrupt vectors
SeeAlso: AX=DE02h
--------Q-2FDE10-----------------------------
INT 2F C - DESQview v2.50+ External Dev Interface - FREE TASK
        AX = DE10h
        BX = mapping context of process (see #00416 at INT 15/AX=1016h)
        DX = task handle of process
Note:   DESQview 2.50+ calls this function before it frees the task; it is
          similar to AX=DE07h but allows the XDI handler to make calls which
          cause context switches
SeeAlso: AX=DE06h,AX=DE07h
--------c-2FDF00-----------------------------
INT 2F - HyperWare programs - INSTALLATION CHECK
        AX = DF00h
        BX = product code (see #03105)
        CX = 0000h
        DX = 0000h
Return: AL = status
            00h not installed
            FFh multiplex number in use
                CX = 5948h ('YH') if selected product installed
                ---HyperDisk---
                BX = code segment of resident portion
                DX = HyperDisk local data version
Program: HyperDisk is a shareware disk cache by HyperWare (Roger Cross)
Range:  AH=C0h to AH=FFh, selected by scanning AH=DFh, then AH=C0h-FFh
SeeAlso: INT 13/AX=8EEDh
Index:  installation check;HyperDisk|installation check;HyperStb
Index:  installation check;HyperKey|installation check;HyperScreen
Index:  HyperDisk;installation check|HyperStb;installation check
Index:  HyperKey;installation check|HyperScreen;installation check

(Table 03105)
Values for HyperWare product code:
 4248h  ('BH') HyperStb
 4448h  ('DH') HyperDisk v4.20+
 4B48h  ('KH') HyperKey
 5348h  ('SH') HyperScreen
--------Q-2FDF00BX5445-----------------------
INT 2F U - Quarterdeck TELTSR.COM - INSTALLATION CHECK
        AX = DF00h
        BX = 5445h ('TE')
        CX = 4C54h ('LT')
        DX = 5352h ('SR')
Return: BX = 5454h ('TT') if installed
        CX = 494Eh ('IN') if installed
        DX = 5454h ('ST') if installed
Program: TELTSR is a Telnet TSR included with Quarterdeck's DESQview/X v2.00
          which provides an INT 14h interface to the network
Range:  AH=DEh to AH=FFh and AH=C0h to AH=DDh, selected by scanning
SeeAlso: AX=DF01h"TELTSR",AX=DF02h"TELTSR",INT 14/AH=56h
--------N-2FDF01BX0000-----------------------
INT 2F U - MSG.COM - INSTALLATION CHECK
        AX = DF01h
        BX = 0000h
Return: AX = FDFFh if installed
           BX = segment of resident code
Program: MSG.COM is a TSR for intercepting incoming Novell broadcast
          messages written by Gary Dobbins (Dobbins@Arizona.Edu)
--------c-2FDF01BX4448-----------------------
INT 2F - HyperDisk v4.50+ - GET CURRENT CACHE STATE
        AX = DF01h
        BX = 4448h ('DH')
Return: AX = 0000h if function supported
            BX = number of cache buffers in use
            CX = number of cache buffers which have been modified
            DL = caching flags (see #03106)
Range:  AH=C0h to AH=FFh, selected by scanning AH=DFh, then AH=C0h-FFh
SeeAlso: AX=DF00h,AX=DF02h

Bitfields for HyperDisk caching flags:
Bit(s)  Description     (Table 03106)
 0      staged writes enabled for floppy disks
 1      staged writes enabled for hard disks
 2      writes verified on floppy disks
 3      writes verified on hard disks
 4      reserved (0)
 5      reserved (0)
 6      floppy caching enabled
 7      all caching functions enabled
--------Q-2FDF01-----------------------------
INT 2F U - Quarterdeck TELTSR.COM - CLOSE CONNECTION
        AX = DF01h
Return: nothing???
Note:   invokes the DESQview/X socket API (see INT 15/AX=DE2Eh) function 0006h
          to close the socket corresponding to the file handle set with
          AX=DF02h; NOP if no file handle was ever set
SeeAlso: AX=DF00h"TELTSR",AX=DF02h"TELTSR"
--------c-2FDF02BX4448-----------------------
INT 2F - HyperDisk v4.50+ - SET CACHE STATE
        AX = DF02h
        BX = 4448h ('DH')
        DL = new caching flags (see #03106)
Return: AX = 0000h if supported
            BX = number of cache buffers in use
            CX = number of cache buffers which have been modified
            DL = previous caching flags (see #03106)
Program: HyperDisk is a shareware disk cache by HyperWare (Roger Cross)
Range:  AH=C0h to AH=FFh, selected by scanning AH=DFh, then AH=C0h-FFh
SeeAlso: AX=DF00h,AX=DF01h
--------Q-2FDF02-----------------------------
INT 2F U - Quarterdeck TELTSR.COM - OPEN CONNECTION
        AX = DF02h
        BX = file handle for connection's socket
Return: AX = status
            0000h successful
            FFFFh no more room in TELTSR's JFT
Program: TELTSR is a Telnet TSR included with Quarterdeck's DESQview/X v2.00
Notes:  the indicated file handle becomes owned by TELTSR, and is closed in
          the caller's JFT
        multiple calls to this function will override the previous assignment
          without closing the previous file; use AX=DF01h before further calls
SeeAlso: AX=DF00h"TELTSR",AX=DF01h"TELTSR"
--------U-2FE000-----------------------------
INT 2F - SETDRVER.COM v2.10+ - INSTALLATION CHECK
        AX = E000h
Return: AX = 4A52h ("JR") if present
Program: SETDRVER is a public domain TSR by Jacob Rieper which sets the
          apparent DOS version analogously to MS-DOS SETVER
Notes:  this installation check differs from the usual one of returning AL=FFh
        the SETDRVER API is fully emulated by Matthias Paul's FREEVER
SeeAlso: AX=E000h/DX=4D50h,AX=E001h,INT 21/AH=52h
--------j-2FE000-----------------------------
INT 2F - KAOSHIDE - INSTALLATION CHECK
        AX = E000h
Return: AL = FFh if installed
Program: KAOSHIDE ('Hidden Kaos') is a PD joke TSR which randomly capitalizes
          alphabetic keys, written by Philip Maland. Although not a virus,
          v2.0 uses some viral-like techniques to hide itself from
          memory-reports by reducing DOS memory size.
--------U-2FE000DX4D50-----------------------
INT 2F - FREEVER v1.0+ - INSTALLATION CHECK
        AX = E000h
        DX = 4D50h ('MP')
Return: AL = FFh if installed
            AH = AMIS INT 2Dh multiplex ID
            CX = FREEVER version (CH=major, CL=minor)
            DX:DI -> AMIS-compliant signature (see #02569)
                (vendor ID is "M. Paul ", program name is "FREEVER ")
Program: FREEVER is an AMIS-conformant freeware DOS version-faking TSR similar
          to SETVER for any DOS-compatible OS, written by Matthias Paul
Note:   FREEVER emulates INT 21/AH=30h, INT 21/AX=3306h, INT 21/AX=4412h,
          INT 21/AX=4452h, and SETDRVER's API on INT 2F/AX=E00xh, as well as
          providing an AMIS API on INT 2Dh
SeeAlso: AX=E000h"SETDRVER",INT 21/AH=30h,INT 21/AX=3306h,INT 21/AX=4452h
--------K-2FE000DX5354-----------------------
INT 2F - StuffIt v3.21+ - INSTALLATION CHECK
        AX = E000h
        DX = 5354h ("ST")
Return: AL = FFh if installed
            BX = version (BH = major, BL = BCD minor)
            DX = segment of resident code
Program: StuffIt is a freeware delayed keyboard stuffer by Terje Mathisen
--------U-2FE001-----------------------------
INT 2F - SETDRVER.COM v2.10+ - GET SETDRVER VERSION
        AX = E001h
Return: AH = major version
        AL = minor version
Note:   the SETDRVER API is fully emulated by Matthias Paul's FREEVER, which
          returns version 2.10 for this call; use AX=E000h/DX=45D0h to get
          FREEVER's version number
SeeAlso: AX=E000h,AX=E000h/DX=45D0h
--------U-2FE002-----------------------------
INT 2F - SETDRVER.COM v2.10+ - GET ORIGINAL DOS VERSION INFO
        AX = E002h
Return: AL = FFh if successful
            BH = major DOS version
            BL = minor DOS version
            CH = DOS version flag
            CL = OEM number
            DH = major DR DOS version number (FFh if unknown)
            DL = minor DR DOS version number (FFh if unknown)
SeeAlso: AX=E003h,AX=E007h,INT 21/AH=30h
--------U-2FE003-----------------------------
INT 2F - SETDRVER.COM v2.10+ - RESET INTERNAL VARIABLES
        AX = E003h
        BH = new major DOS version
        BL = new minor DOS version
        CH = new DOS version flag
        CL = new DOS revision number
        DH = new OEM number
SeeAlso: AX=E002h
--------U-2FE004-----------------------------
INT 2F - SETDRVER.COM v2.10+ - ENABLE TSR
        AX = E004h
Return: AL = FFh if successful
SeeAlso: AX=E000h,AX=E005h,AX=E006h
--------U-2FE005-----------------------------
INT 2F - SETDRVER.COM v2.10+ - DISABLE TSR
        AX = E005h
Return: AL = FFh if successful
SeeAlso: AX=E000h,AX=E004h,AX=E006h
--------U-2FE006-----------------------------
INT 2F - SETDRVER.COM v2.10+ - GET TSR STATUS
        AX = E006h
Return: AL = FFh if successful
            BL = status
                01h resident and active
                02h resident and inactive
--------U-2FE007-----------------------------
INT 2F - SETDRVER.COM v2.10+ - GET TaskMAX STATUS AT INSTALLATION
        AX = E007h
Return: AL = FFh if successful
            BL = status
                00h if TaskMAX not loaded before SETDRVER
                FFh if TaskMAX was loaded before SETDRVER
SeeAlso: AX=E003h
--------U-2FE0-------------------------------
INT 2F - SETDRVER.COM - RESERVED FOR FUTURE USE
        AH = E0h
        AL = 08h-10h
--------K-2FE100-----------------------------
INT 2F - Phantom2 v1.1+ - INSTALLATION CHECK
        AX = E100h
Return: AX = 0001h if installed
            DS:SI -> ASCIZ hotkey name
            DS:DI -> ASCIZ recording filename
Program: Phantom of the Keyboard II is a shareware keystroke recorder/replayer
          by P2 Enterprises
SeeAlso: AX=E101h,AX=E102h,AX=E103h,AX=E300h
Index:  hotkeys;Phantom2
--------K-2FE101-----------------------------
INT 2F - Phantom2 v1.1+ - FUNCTION REQUEST
        AX = E101h
        BX = function mask (see #03107)
        CX = code for hotkey (as returned by INT 16/AH=00h) if BX bit 6 set
        DS:DX -> ASCIZ filespec if BX bit 7 set
SeeAlso: AX=E100h
Index:  hotkeys;Phantom2

Bitfields for Phantom2 function mask:
Bit(s)  Description     (Table 03107)
 0      record
 1      play
 2      QuickPlay
 3      loop
 4      mode display toggle
 5      sound toggle
 6      set hotkey
 7      set filespec
--------K-2FE102-----------------------------
INT 2F - Phantom2 v1.1+ - UNINSTALL
        AX = E102h
Return: AX = status
            0001h removal successful
            0002h not installed as TSR
            FFFFh disabled but not removed
SeeAlso: AX=E100h
--------K-2FE103-----------------------------
INT 2F - Phantom2 v2.8 - SET ??? FLAG
        AX = E103h
Return: AX = 0001h
SeeAlso: AX=E100h
--------y-2FE200-----------------------------
INT 2F - SecureDevice - LOGIN TO DRIVE
        AX = E200h
        DL = drive number (0 = A:)
        DS:SI -> 104-byte key
Return: AL = status
            00h unable to determine key's validity
            01h key is valid
            FFh key is invalid
Program: SecureDevice is a copylefted device driver by Max Loewenthal and
          Arthur Helwig which turns one or more disk files into encrypted
          logical drives
SeeAlso: AX=E201h,AX=E203h,AX=E209h
--------y-2FE201-----------------------------
INT 2F - SecureDevice - GET INFORMATION
        AX = E201h
        DX = driver index (0000h = first loaded)
Return: AL = number of volumes handled by driver
        DL = drive number of first volume (00h = A:)
SeeAlso: AX=E200h,AX=E203h,AX=E209h
--------y-2FE203-----------------------------
INT 2F - SecureDevice - DESTROY PASSWORD (LOGOUT FROM DRIVE)
        AX = E203h
        DL = drive number (00h = A:) or FFh for all drives
Return: nothing
SeeAlso: AX=E200h,AX=E209h
--------y-2FE209DX0000-----------------------
INT 2F - SecureDevice - INSTALLATION CHECK
        AX = E209h
        DX = 0000h
Return: AX = 1DEAh if installed
            DX = number of drivers installed
--------K-2FE300-----------------------------
INT 2F - ANARKEY.COM - INSTALLATION CHECK
        AX = E300h
Return: AL = state
            00h not installed
            FEh if installed but suspended (v3.0+)
            FFh installed
Program: ANARKEY.COM is a commandline recall program by Steven Calwas
Range:  AH=C0h to AH=FFh, selected by commandline switch
SeeAlso: AX=E100h,AX=E301h,AX=E302h,AX=E303h,AX=E304h,AX=E305h,AX=E306h
SeeAlso: AX=E307h,INT 66"Newkey"
--------V-2FE300-----------------------------
INT 2F - Blank - INSTALLATION CHECK
        AX = E300h
Return: AL = FFh if installed
            ES = resident code segment
Program: Blank is a shareware screen blanker by Yonah Schmeidler
Note:   AH=E3h is the default, which may be reconfigured by the installation
          program in the registered version
SeeAlso: AH=93h,AX=C050h,INT 14/AX=AA01h
Index:  screen saver;Blank
--------K-2FE301-----------------------------
INT 2F U - ANARKEY.COM v2+ - GET ???
        AX = E301h
Return: DX:BX -> ??? (see #03108,#03109)
SeeAlso: AX=E300h

Format of returned data structure for ANARKEY v2.0:
Offset  Size    Description     (Table 03108)
 -7   7 BYTEs   signature ('ANARKEY')
 00h    WORD    ??? (I see 0001h in v2.0)
 02h    WORD    ??? (I see 0001h in v2.0)
 04h    WORD    ??? (I see 0 in v2.0)
 06h    WORD    PSP segment of next program loaded

Format of returned data structure for ANARKEY v3+:
Offset  Size    Description     (Table 03109)
 -1     BYTE    multiplex number
 00h    WORD    ??? (I see 0001h in v3.0-4.0)
 02h    WORD    ??? (I see 0001h in v3.0-4.0)
 04h    BYTE    ??? (I see 0 in v3.0-4.0)
 05h    WORD    PSP segment of next program loaded
--------K-2FE302-----------------------------
INT 2F U - ANARKEY.COM v3+ - ???
        AX = E302h
        BL = ???
Return: ???
SeeAlso: AX=E300h
--------K-2FE303-----------------------------
INT 2F U - ANARKEY.COM v3+ - ANARKMD API
        AX = E303h
        BL = function
            01h toggle insert mode
            02h display contents of history buffer
            03h write history buffer to file
                ES:DX -> file name
            04h clear history buffer
            05h undefine all aliases
            06h show aliases
            07h list programs using Unix switchar
            08h jump to bottom of history buffer
            09h (v4.0) add string to history buffer
                ES:DX -> ASCIZ string
            0Ah (v4.0) ???
                ES:DX -> ???
            0Bh (v4.0) copy string to edit buffer for use as next input line
                ES:DX -> ASCIZ string
            0Ch (v4.0) ???
            0Dh (v4.0) copy ??? to ???
            0Eh (v4.0) ???
            0Fh (v4.0) ???
            10h (v4.0) set ??? flag
            11h (v4.0) display error message about running in EMS under Windows
Return: ???
SeeAlso: AX=E300h
--------K-2FE304-----------------------------
INT 2F U - ANARKEY.COM v2+ - ???
        AX = E304h
        BL = ???
Return: ???
SeeAlso: AX=E300h
--------K-2FE305-----------------------------
INT 2F U - ANARKEY.COM v3+ - ENABLE/SUSPEND ANARKEY
        AX = E305h
        BL = new state
            01h suspended
            00h enabled
SeeAlso: AX=E300h
--------K-2FE306-----------------------------
INT 2F U - ANARKEY.COM v4.0 - GET ???
        AX = E306h
Return: AX = ???
SeeAlso: AX=E300h
--------K-2FE307-----------------------------
INT 2F U - ANARKEY.COM v4.0 - GET ???
        AX = E307h
Return: AX = ???
        BL = ???
SeeAlso: AX=E300h
--------K-2FE337-----------------------------
INT 2F - INT16.COM - INSTALLATION CHECK
        AX = E337h
Return: AX = 0013h if installed
Program: INT16.COM is an INT16 keyboard BIOS replacement for
          INT 16/AH=00h-02h,10h-12h (based on K3) written by Martin Gerdes
          and published in c't 05/1990.
SeeAlso: AX=ED58h
--------l-2FE44D-----------------------------
INT 2F - NDOS - API
        AX = E44Dh
Program: NDOS is a version of 4DOS licensed to Symantec for inclusion in the
          Norton Utilities
Note:   as NDOS is a licensed version of 4DOS v3.03, the API is identical to
          that for 4DOS, except that AH=E4h instead of D4h and the installation
          check returns AX=44EEh instead of AX=44DDh
SeeAlso: AX=D44Dh,AX=E44Eh
--------l-2FE44E-----------------------------
INT 2F C - NDOS - AWAITING USER INPUT
        AX = E44Eh
        BX = condition
            0000h NDOS is ready to display prompt
            0001h NDOS has displayed the prompt, about to accept user input
Return: handler must preserve SI, DI, BP, SP, DS, ES, and SS
SeeAlso: AX=E44Dh
--------K-2FE44FBX0000-----------------------
INT 2F - NDOS v4.0+ - KSTACK.COM - INSTALLATION CHECK
        AX = E44Fh
        BX = 0000h
Return: AX = 44EEh if installed
Program: NDOS is a version of 4DOS licensed to Symantec for inclusion in the
          Norton Utilities
Note:   this function is also supported by ANSIPLUS v3.01+ and K3PLUS v6.20+,
          which emulate the 4DOS and NDOS keystack
SeeAlso: AX=D44Fh/BX=0000h,AX=E44Fh/BX=0001h
--------K-2FE44FBX0001-----------------------
INT 2F - NDOS v4.0+ - KSTACK.COM - PLACE KEYSTROKES INTO KEYSTACK
        AX = E44Fh
        BX = 0001h
        CX = number of keystrokes (01h-FFh)
        DS:DX -> keystroke list (one word per keystroke)
Return: AX = status
            0000h successful
            nonzero failed
        BX,CX,DX destroyed
Notes:  the keystrokes are the exact values to return from subsequent calls to
          INT 16 with AH=00h,01h,10h, or 11h, with the following exceptions:
                0000h causes subfunctions 01h and 11h to indicate an empty
                      keyboard buffer
                FFFFh is followed by a word indicating the number of clock
                      ticks to delay before the next faked keystroke
        v4.00 KSTACK overwrites any unread keystrokes from the previous
          invocation, and does not range-check CX; it will overwrite memory
          following the resident portion if CX is greater than 100h.
        this function is also supported by ANSIPLUS v3.01+ and K3PLUS v6.20+,
          which emulate the 4DOS and NDOS keystack
SeeAlso: AX=E44Fh/BX=0000h,INT 16/AH=00h,INT 21/AX=4403h"DOS"
--------U-2FE600CL30-------------------------
INT 2F - Virtual 486 - INSTALLATION CHECK
        AX = E600h
        CL = 30h
        BX = C0DEh
Return: BX = DEC0h if installed
Program: Virtual 486 is a 80486 CPU emulator for an 80386 by Solar Designer
----------2FE700BX4158-----------------------
INT 2F - Multiplex - ??? - INSTALLATION CHECK???
        AX = E700h
        BX = 4158h ("AX")
        CX = 4953h ("IS")
        DX = 4845h ("HE")
Return: AL = FFh if installed
            BX = 4C4Fh ("LO") if ??? installed
            CX = 4F4Bh ("OK")
            DX = 4F55h ("OU")
                ES:DI -> ???
Range:  AH=C0h to AH=FFh, selected by scanning AH=E7-FFh, then AH=C0h-E6h
Note:   called by QDPMI when its Real to Protected Mode Switch Entry Point
          is called
--------f-2FE77EBX0000-----------------------
INT 2F - CTDEMN - INSTALLATION CHECK
        AX = E77Eh
        BX = 0000h
        CX = 4F4Dh ('OM')
        DX = 5453h ('TS')
Return: AX = 7EE7h if installed
            BX = resident code segment
            CX = 6F6Dh ('om')
            DX = 7473h ('ts')
Program: CTDEMN is a file daemon TSR by Simultan AG
--------E-2FED00-----------------------------
INT 2F - Phar Lap DOS EXTENDERS - INSTALLATION CHECK
        AX = ED00h
        BL = DOS extender ID (see #03110)
Return: AL = status
            00h not installed
            FFh installed
                SI = 5048h ("PH")
                DI = 4152h ("AR")
                CH = major version number
                CL = minor version number
                DX = flags
                    bit 0: running under DPMI
                    bit 1: running under Phar Lap VMM
                if running under DPMI:
                    BX = DPMI version (BH = major, BL = minor)
SeeAlso: AH=A1h,AX=F100h,AX=FBA1h

(Table 03110)
Values for Phar Lap DOS extender ID:
 01h    286dosx v1.3+ (Software Development Kit)
 02h    286dosx v1.3+ (Run-Time Kit)
 03h    386dosx v4.0+ (SDK)
 04h    386dosx v4.0+ (RTK)
--------E-2FED03-----------------------------
INT 2F R - Phar Lap 386/DOS-Extender v4.1 - GET EXTENDER ENTRY POINT
        AX = ED03h
        CX = real-mode code segment
        DX = real-mode data segment
Return: CF clear if successful
            CX = protected-mode code segment selector
            DX = protected-mode data segment selector
            ES:DI -> real-mode entry point for calling protected-mode functions
                      (see INT 21/AX=250Dh)
        CF set on error
            AX = error code
                0008h unable to allocate LDT descriptors
--------E-2FED10BL05-------------------------
INT 2F - Pharlap DOS Extender - ???
        AX = ED10h
        BL = 05h
        ES:SI -> ??? structure
Return: AX = ???
        SI = ???
        DI = ???
SeeAlso: AX=ED00h,AX=ED11h
--------E-2FED11BL05-------------------------
INT 2F - Pharlap DOS Extender - FATAL EXIT TO REAL MODE ???
        AX = ED11h
        BL = 05h
        CX = ???
        DX = ???
        ES:SI -> ??? structure
        SS:SP = new stack ???
Return: ???
Note:   called immediately prior to terminating program with INT 21/AX=4CFFh
SeeAlso: AX=ED00h,AX=ED10h
--------K-2FED58-----------------------------
INT 2F U - K5.COM - INSTALLATION CHECK
        AX = ED58h
Return: AX = 000Dh if installed
            ES = resident code segment
            BX = ??? (9999h)
            ???
Program: K5 is an extended keyboard driver by Martin Gerdes, based on his K3
SeeAlso: AX=E337h,INT 16/AX=AF20h
--------E-2FED80-----------------------------
INT 2F - Phar Lap 286|DOS Extender Lite v2.5 - ???
        AX = ED80h
        BL = DOS extender ID (see #03110)
        SI = 5048h ("PH")
        DI = 4152h ("AR")
        ???
Return: ???
--------O-2FEDC8BX0000-----------------------
INT 2F - Novell ??? - INSTALLATION CHECK???
        AX = EDC8h ('EDC' = Novell European Development Center)
        BX = 0000h
        CX = 0000h
        DX = 1234h
Return: ???
Desc:   called by Novell DOS 7 LOCK command during installation; purpose
          unknown
--------y-2FEE00-----------------------------
INT 2F - GRIDLOC.EXE - INSTALLATION CHECK
        AX = EE00h
Return: AL = FFh if installed
Program: GRIDLOC is a PC security program by Intelligent Security Systems, Inc.
SeeAlso: INT 21/AH=40h"NB.SYS"
--------U-2FEE00-----------------------------
INT 2F - XVIEW - INSTALLATION CHECK
        AX = EE00h
Return: AX = 00FFh if installed
Program: XVIEW is a hypertext viewer by Flambeaux Software, Inc.
--------N-2FEE00-----------------------------
INT 2F - WEB v4.02 - INSTALLATION CHECK
        AX = EE00h
Return: AL = status
            00h not installed
            FFh installed
Program: WEB is an IPX-based peer-to-peer network by Webcorp.
SeeAlso: AH=EEh"WEB",AX=EEF0h
--------U-2FEE01-----------------------------
INT 2F - XVIEW - POP UP GIVING TOPIC SEARCH KEYWORD
        AX = EE01h
        DS:DX -> ASCIZ string containing case-insensitive keyword to look up
Return: AX = status (see #03111)
Note:   the specified keyword should be a hyperlink in the _IndexPage of some
          database; the current database is searched first
SeeAlso: AX=EE00h"XVIEW",AX=EE02h,AX=EE03h,AX=EE04h,AX=EE06h

(Table 03111)
Values for XVIEW function status:
 0000h  successful
 00F1h  unknown subfunction
 00F2h  unable to pop up
--------U-2FEE02-----------------------------
INT 2F - XVIEW - POP UP GIVING A PAGE NUMBER
        AX = EE02h
        DX = physical page number or anchor page number (see #03112)
Return: AX = status (see #03111)
Note:   physical page numbers are assigned by the hypertext compiler, and
          will change if a page is inserted in the middle
SeeAlso: AX=EE00h"XVIEW",AX=EE01h,AX=EE05h,AX=EE06h

(Table 03112)
Values for XVIEW anchor page number:
 FFEAh  _Credits
 FFECh  _SearchTopics
 FFEDh  _SearchText
 FFF0h  _ManualList
 FFF5h  _HelpOnHelp
 FFF8h  _HomePage
 FFF9h  _IndexPage
--------U-2FEE03-----------------------------
INT 2F - XVIEW - POP UP GIVING FILENAME AND SEARCH TOPIC OR PAGE NUMBER
        AX = EE03h
        DS:DX -> data packet (see #03113)
Return: AX = status (see #03111)
SeeAlso: AX=EE00h"XVIEW",AX=EE01h,AX=EE02h,AX=EE06h

Format of XVIEW data packet:
Offset  Size    Description     (Table 03113)
 00h    DWORD   -> ASCIZ database filespec (0000h:0000h for current database)
 04h    DWORD   -> ASCIZ text to look up or 0000h:0000h
 08h    WORD    page number (0000h if keyword used)
 0Ah  6 BYTEs   reserved
--------U-2FEE04-----------------------------
INT 2F - XVIEW - POP UP AND READ SCREEN FOR SEARCH TOPIC KEYWORD
        AX = EE04h
Return: AX = status (see #03111)
Note:   equivalent to the action taken when the user presses the Alt-L hotkey
SeeAlso: AX=EE00h"XVIEW",AX=EE01h,AX=EE03h,AX=EE06h
--------U-2FEE05-----------------------------
INT 2F - XVIEW - POP UP TO MOST-RECENTLY VIEWED PAGE
        AX = EE05h
Return: AX = status (see #03111)
Note:   equivalent to the action taken when the user presses the Alt-H hotkey
SeeAlso: AX=EE00h"XVIEW",AX=EE02h,AX=EE06h
--------U-2FEE06-----------------------------
INT 2F - XVIEW - WAIT FOR POP-DOWN AND GET EXIT CODE
        AX = EE06h
Return: AX = status (see also AX=EE01h)
            0001h specified filename is not an xText database
            0002h no databases found
            0003h bad data in file
            0004h memory shortage
            0005h unable to open the requested file
            0007h invalid page number for file
Note:   although this call is not required, the exit code can alert the
          caller to problems; if the call is not made, the program should
          enforce a delay of about 1/2 second to allow the viewer to pop up,
          and should not get keyboard input or attempt disk accesses during
          the delay
SeeAlso: AX=EE00h"XVIEW",AX=EE01h,AX=EE02h,AX=EE03h,AX=EE04h,AX=EE05h
--------N-2FEE-------------------------------
INT 2F - WEB v4.02 - WEB MODULE INSTALLATION CHECK
        AH = EEh
        AL = module ID (see #03114)
Return: AX = 0000h if installed
            ES:DI -> far entry point for module-specific API calls
                  (see #03115,#03116,#03117,#03118,#03119)
Program: WEB is an IPX-based peer-to-peer network by Webcorp.
SeeAlso: AX=EE00h"WEB"

(Table 03114)
Values for WEB module ID:
 10h    server module (SERVER.EXE)
 20h    client module (CLIENT.EXE)
 30h    mail module (MAIL.EXE)
 40h    spooler (PCSPOOL.EXE)
 50h    kernel module (KERNEL.EXE)
 60h    SAP module (KERNEL.EXE)
 70h    resident station manager (SM.EXE)
 90h    router module (ROUTER.EXE)

(Table 03115)
Call server module entry point with:
        BX = function
            0000h remove server module
                Return: AX = status (0000h if successful, else WEB error code)
            0001h create SYSINFO file
                Note:   the SYSINFO file is used by the station manager when
                          displaying info for a particular station
            0002h get server object table
                Return: CX = number of server objects
                        ES:DI -> server object table
                Note:   server objects include drives and devices that the
                          server module controls
            0003h get server variables
                Return: ES:DI -> server variables

(Table 03116)
Call client module entry point with:
        BX = function
            0000h remove client module
                Return: AX = status (0000h if successful, else WEB error code)
            0001h decrement client-only flag
            0002h increment client-only flag
            0005h set device capture
                Note:   decrements DeviceOutput flag, telling the spooler that
                          it may trap device output again
            0006h clear device capture
                Note:   increments DeviceOutput flag, telling the spooler that
                          it should not trap device output (this is used
                          internally by the spooler to prevent it from trapping
                          its own output)
            0007h get client debug pointer
                Return: ES:DI -> client debug data structure (see #03120)
            0008h get root drive
                Return: AL = WEB startup drive
            0009h get maximum possible drive/device redirections
                Return: AL = maximum drive redirections
                        CH = maximum LPTx redirections
                        CL = maximum COMx redirections
            000Ah suspend client
                Return: AX = previous value of Suspend flag
            000Bh resume client
                Return: AX = previous value of Suspend flag
            000Ch get instance data
                CX = maximum number of structures in array
                ES:DI -> buffer for array of WIN_INSTANCE_DATA structures
                          (see #03121)
                Return: CX = number of structures actually returned
                Note:   used internally by WEB4WIN

(Table 03117)
Call mail module entry point with:
        BX = function
            0000h remove mail module
                Return: AX = status (0000h successful, else WEB error code)
            0001h set mail poll
                Note:   schedules the WEB mail module
            0002h set mail notify
                Note:   sets the Notify flag, which determines whether the
                          user will be notified when mail is received
            0003h clear mail notify
                Note:   clears the Notify flag, which determines whether the
                          user will be notified when mail is received
            0004h check whether new mail has arrived
                Return: AL = new mail status
                            00h no new mail since last call
                            else new mail has arrived
                Note:   also clears the new-mail flag after retrieving it
            0005h send notify
                ES:DI -> name of WEB user to be notified
            0006h get post office
                Return: ES:DI -> full network path of Post Office subdirectory

(Table 03118)
Call spooler entry point with:
        BX = function
            0000h remove PCSpool module
                Return: AX = status (0000h successful, else WEB error code)
            0001h set spooler poll
                Note:   schedules the WEB spooler
            0002h check spooler changed
                Return: AX = 0000h
                Note:   this call is a NOP in current versions of WEB

(Table 03119)
Call kernel entry point with:
        BX = function
            0000h remove kernel module
                Return: AX = status (0000h successful, else WEB error code)
            0001h set kernel ^S filter
                DL = new state (00h don't filter ^S, nonzero do filter)
            0002h get kernel data area
                Return: ES:DI -> kernel data area
            0003h display dialog box
                CL = dialog box type
                    00h password
                    01h E-Note received notification
                    02h Novell login
                    03h general notification
                DL = number of rows to display
                ES:SI -> array of far pointers to rows to be displayed
                ES:DI -> Pascal-style input buffer
                Return: AX = status (0000h successful, else error code)
            0004h kernel service events
            0005h get kernel's in-critical-section flag
                Return: ES:DI -> kernel InCriticalSection flag
            0006h schedule DOS event
                AL = directive
                    00h do not ignore WEB ExtraBusy flag
                    01h ignore ExtraBusy flag
                    02h (WEB4WIN) check that current Windows VM is foregrnd VM
                ES:SI -> WEB AES Event Control Block (ECB) (see #03122)
                Notes:  the WEB Asynchronous Event Scheduler is similar to the
                          one used by IPX; this call schedules a special ECB
                          to be executed at a later time.  Unlike IPX ECBs,
                          the timeout must be set explicitly by the caller
                        this function also calls function 0004h
            0007h check busy
                AL = directive
                    00h do not ignore WEB ExtraBusy flag
                    01h ignore ExtraBusy flag
                    02h (WEB4WIN) check that current Windows VM is foregrnd VM
                Return: AX = status (0000h not busy, else busy)
            0008h set keyboard intercept
                Note:   currently a NOP which returns immediately
            0009h get keyboard intercept
                Note:   currently a NOP which returns immediately
            000Ah get dialog flags
                Return: ES:DI -> kernel dialog flags (see #03123)
            000Bh get network path
                Return: ES:DI -> fully-qualified network path of file where
                                the screen is stored on Dialog calls
            000Ch kernel alternate dialog
                CL = dialog box type
                    00h password
                    01h E-Note received notification
                    02h Novell login
                    03h general notification
                DL = number of rows to display
                ES:SI -> array of far pointers to rows to be displayed
                ES:DI -> Pascal-style input buffer
                Return: AX = status (0000h successful, else error code)
                Note:   this function is identical to function 0003h except
                          that it does not notify WEB4WIN of the impending
                          dialog request
            000Dh get machine/operating system type
                Return: AX = machine/operating system type
                            01h IBM PC, MS-DOS
                            02h IBM PC, DOSV (Japanese)
                            03h NEC PC-9800, JDOS (Japanese)
                            04h IBM PC, Korean DBC DOS

Format of client debug data structure:
Offset  Size    Description     (Table 03120)
 00h    WORD    total files
 02h    WORD    files free
 04h    WORD    no files
 06h    WORD    minimum files
 08h    WORD    total FCBs
 0Ah    WORD    total safe FCBs
 0Ch    WORD    FCBs in use
 0Eh    WORD    wrong FCB
 10h    WORD    compressed
 12h    WORD    retransmits

Format of WIN_INSTANCE_DATA structure:
Offset  Size    Description     (Table 03121)
 00h    DWORD   real-mode pointer to data to be instanced
 04h    WORD    size of data to be instanced

Format of WEB AES Event Control Block:
Offset  Size    Description     (Table 03122)
 00h    DWORD   link address
 04h    WORD    ESR address
 08h    BYTE    InUse flag
 09h    BYTE    completion code
 0Ah  3 BYTEs   reserved
 0Dh    WORD    timeout
 0Fh    BYTE    IgnoreExtra flag
 10h    WORD    PSP
 12h    DWORD   DTA
 16h    WORD    AX value for DOS critical information
 18h    WORD    BX value for DOS critical information
 1Ah    WORD    CX value for DOS critical information
 1Ch    WORD    DX value for DOS critical information

(Table 03123)
Values for kernel dialog flags:
 01h    dialog will timeout
 02h    display stars instead of entered keystrokes
--------N-2FEEF0-----------------------------
INT 2F - WEB v4.02 - WEB GENERAL NOTIFICATION
        AX = EEF0h
        BX = notification function ID (see #03124)
Return: varies by notification function
Program: WEB is an IPX-based peer-to-peer network by Webcorp.
Note:   the notification functions are used internally by WEB modules to notify
          other modules and external programs of actions or event, and should
          never be called by an application
SeeAlso: AX=EE00h"WEB"

(Table 03124)
Values for WEB Notification Function ID:
 00h    node added
 01h    node deleted
 02h    dial attempt
 03h    dial failed
 04h    file close
 05h    close connection
 07h    check Windows mode
 20h    link up
 21h    link down
--------K-2FF000-----------------------------
INT 2F U - 4MAP - INSTALLATION CHECK
        AX = F000h
Return: AX = 00FFh
Program: 4MAP is a keybinding program for 4DOS (see AX=D44Dh) by Ho-Ping Tseng
Note:   returns AX=00FFh for any value of AL not listed here
SeeAlso: AX=D44Dh,AX=F001h,AX=F002h
--------K-2FF001-----------------------------
INT 2F U - 4MAP - GET KEY MAPPINGS
        AX = F001h
Return: ES:BX -> key mappings
SeeAlso: AX=F000h
--------K-2FF002-----------------------------
INT 2F U - 4MAP - INSERT CHARACTER INTO ???
        AX = F002h
        BL = character to insert
Return: AX = status
            0000h successful
            0001h buffer full
SeeAlso: AX=F000h,AX=F003h
--------K-2FF003-----------------------------
INT 2F U - 4MAP - INSERT CHARACTER INTO ???
        AX = F003h
        BL = character to insert
Return: AX = status
            0000h successful
            0001h buffer full
Program: 4MAP is a keybinding program for 4DOS (see AX=D44Dh) by Ho-Ping Tseng
SeeAlso: AX=F000h,AX=F002h
--------m-2FF1-------------------------------
INT 2F U - MIN-MEM v2.11 - INSTALLATION CHECK
        AH = F1h
        AL <> F1h
Return: AL = F1h if installed
Program: MIN-MEM is a shareware TSR manager by Biologic which permits up to 24
          popup TSRs to be loaded but swapped out to disk, EMS, or XMS.  One
          TSR at a time is brought back into memory at the user's request.
--------E-2FF100-----------------------------
INT 2F - DOS EXTENDER INSTALLATION CHECK
        AX = F100h
Return: AL = FFh if DOS extender present
            SI = 444Fh ("DO")
            DI = 5358h ("SX")
Note:   supported or soon to be supported by Phar Lap, Rational, Ergo, and IGC
SeeAlso: AH=A1h,AX=ED00h,AX=FBA1h/BX=0081h,INT 15/AX=BF02h
--------W-2FF200-----------------------------
INT 2F - WINX - INSTALLATION CHECK
        AX = F200h
Return: AX = 00FFh if installed
Program: WINX is a DOS/Windows utilities by Al Williams which can be used to
          launch Windows applications from a DOS Box; it was published in
          "DOS and Windows Protected Mode-Programming with DOS Extenders"
          (Addison-Wesley) and should not be confused with the Windows driver
          of the same name which is part of the DESQview/X package
--------W-2FF201-----------------------------
INT 2F - WINX - RETURN ADDRESS OF SERVER BUFFER
        AX = F201h
Return: AX = status
            FFFFh if WINX is busy processing a different request
            0000h if successful
                BX:CX = address of server buffer (see #03125)

Format of WINX server buffer:
Offset  Size    Description     (Table 03125)
 00h    BYTE    command/status
                00h buffer available
                01h buffer contains result
                02h change directory
                03h execute program
                FFh terminate windows portion of WINX
 01h  ? BYTEs   command (03h) or directory (02h)
  or
 01h    DWORD   result (01h)
--------W-2FF202-----------------------------
INT 2F - WINX - SET SERVER'S WORKING DIRECTORY
        AX = F202h
        BX:CX -> directory
Return: AX = status
            FFFFh if WINX is busy processing a different request
            0000h if successful
SeeAlso: AX=F200h,AX=F203h
--------W-2FF203-----------------------------
INT 2F - WINX - EXECUTE COMMAND
        AX = F203h
        BX:CX -> command
Return: AX = status
            0000h if successful
            FFFFh if WINX is busy processing a different request
SeeAlso: AX=F200h,AX=F202h
--------G-2FF400-----------------------------
INT 2F - FINDIRQ.COM - INSTALLATION CHECK
        AX = F400h
Return: AL = 01h if installed
Program: FINDIRQ is a program by Rick Knoblaugh published in the 9/28/93 issue
          of PC Magazine; when run as a TSR it can determine which IRQs are
          used only when a device is active
SeeAlso: AX=F401h
--------N-2FF400-----------------------------
INT 2F - PowerLAN - INSTALLATION CHECK???
        AX = F400h
        ???
Return: ???
Note:   this function is called by PowerLAN's NET.EXE just prior to calling
          AX=F401h (get version)
SeeAlso: AX=F401h"PowerLAN"
--------N-2FF401-----------------------------
INT 2F - PowerLAN - GET VERSION
        AX = F401h
Return: ES:BX -> WORD containing 100*version (in decimal)
Program: PowerLAN is a networking product by Performance Technology
SeeAlso: AX=F400h"PowerLAN",AX=F483h"PowerLAN"
--------G-2FF401CX5121-----------------------
INT 2F - FINDIRQ.COM - GET HOOKED INTERRUPTS
        AX = F401h
        CX = 5121h ('Q!')
Return: AX:DX -> hooked interrupt table (see #03126)
SeeAlso: AX=F400h

Format of FINDIRQ hooked interrupt table:
Offset  Size    Description     (Table 03126)
 00h    BYTE    1Ch
 01h    DWORD   FINDIRQ's INT 1C handler
 05h    DWORD   original INT 1C handler
 09h    BYTE    28h
 0Ah    DWORD   FINDIRQ's INT 28 handler
 0Eh    DWORD   original INT 28 handler
 12h    BYTE    2Fh
 13h    DWORD   FINDIRQ's INT 2F handler
 17h    DWORD   original INT 2F handler
--------N-2FF483-----------------------------
INT 2F - PowerLAN - ???
        AX = F483h
        ???
Return: ???
SeeAlso: AX=F400h"PowerLAN",AX=F401h"PowerLAN"
--------d-2FF700-----------------------------
INT 2F - AUTOPARK.COM - INSTALLATION CHECK
        AX = F700h
Return: AL = state
            00h not installed
            FFh installed
Program: AUTOPARK.COM is a resident hard disk parker by Alan D. Jones
--------d-2FF701-----------------------------
INT 2F - AUTOPARK.COM - SET PARKING DELAY
        AX = F701h
        BX:CX = 32-bit count of 55ms timer ticks
--------d-2FF800CX4455-----------------------
INT 2F U - SuperStor PRO 2XON.COM - INSTALLATION CHECK
        AX = F800h
        CX = 4455h ("DU")
        DL = 45h ("E")
Return: AL = FFh if installed
            ES:BX -> ASCII signature "Universal Data Exchange"
Program: SuperStor is a disk-compression program by Addstor.
Note:   returns AX=0001h if AL is not 00h or 01h
SeeAlso: AX=1001h,AX=F801h
--------d-2FF801CX4455-----------------------
INT 2F U - SuperStor PRO 2XON.COM - UNINSTALL
        AX = F801h
        CX = 4455h ("DU")
        DL = 45h ("E")
        ES:BX = return address if successful
Return: at specified address if successfully removed from memory
        else
            AL = error code
            ???
Program: SuperStor is a disk-compression program by Addstor.
Note:   returns AX=0001h if AL is not 00h or 01h
SeeAlso: AX=1001h,AX=F800h
----------2FFA00-----------------------------
INT 2F - Multiplex - ??? - INSTALLATION CHECK???
        AX = FA00h
        BX = ??? (0408h)
        CX = ??? (001Fh)
        DX = ??? (0102h)
        SI = ??? (5ACCh)
        DI = ??? (0632h)
Return: ???
Note:   called by WinEmacs at startup
----------2FFA00-----------------------------
INT 2F - Multiplex - ??? - INSTALLATION CHECK???
        AX = FA00h
        BX = ??? (03FCh)
        CX = ??? (003Fh)
        DX = ??? (00FFh)
        SI = ??? (5AA6h)
        DI = ??? (0620h)
Return: ???
Note:   called by Matlab at startup
--------*-2FFB-------------------------------
INT 2F - Multiplex - RESERVED BY BORLAND INTERNATIONAL
        AH = FBh
SeeAlso: AX=FB42h/BX=0001h
--------f-2FFB-------------------------------
INT 2F U - Conner Backup Exec AUTORES - API
        AH = FBh
        BL = function number (00h-07h)
        ???
Return: ???
Program: AUTORES is a resident program launcher for unattended backups
--------a-2FFB00-----------------------------
INT 2F U - AutoBraille v1.1A - INSTALLATION CHECK
        AX = FB00h
Return: AX = 00FFh if installed
Program: AutoBraille is a shareware text-to-braille converter by KANSYS, Inc.
SeeAlso: INT 10/AX=3800h,INT 14/AX=F0F1h
--------U-2FFB00-----------------------------
INT 2F U - Jot-It! v1.50 - INSTALLATION CHECK
        AX = FB00h
Return: AX = FFFFh if installed
            BX = version (BCD, BH=major, BL=minor)
SeeAlso: AX=FB03h"Jot-It",AX=FB01h"Jot-It"
--------a-2FFB01-----------------------------
INT 2F U - AutoBraille v1.1A - ???
        AX = FB01h
        ???
Return: ???
--------U-2FFB01-----------------------------
INT 2F U - Jot-It! v1.50 - GET USER NAME
        AX = FB01h
Return: DX:BX -> ASCIZ user name
SeeAlso: AX=FB02h"Jot-It"
--------a-2FFB02-----------------------------
INT 2F U - AutoBraille v1.1A - ???
        AX = FB02h
Return: AH = ???
        AL = ???
--------U-2FFB02-----------------------------
INT 2F U - Jot-It! v1.50 - GET MESSAGE DIRECTORY
        AX = FB02h
Return: DX:BX -> ASCIZ name of directory in which messages are stored
SeeAlso: AX=FB01h"Jot-It"
--------a-2FFB03-----------------------------
INT 2F U - AutoBraille v1.1A - GET NEXT ???
        AX = FB03h
Return: AX = ???
--------U-2FFB03-----------------------------
INT 2F U - Jot-It! v1.50 - UNINSTALL
        AX = FB03h
Return: resident code removed from memory
Note:   CAUTION: NO checks are performed to ensure that the interrupt vectors
          being unhooked (08h,09h,28h,2Fh) actually point at the Jot-It! code
SeeAlso: AX=FB00h"Jot-It"
--------a-2FFB-------------------------------
INT 2F U - AutoBraille v1.1A - SET ???
        AH = FBh
        AL = 04h-08h
Return: AX = 0000h
--------a-2FFB-------------------------------
INT 2F U - AutoBraille v1.1A - SET ???
        AH = FBh
        AL = 09h-0Fh (???, 0Eh = COM1, 0Fh = COM2)
Return: ???
Program: AutoBraille is a shareware text-to-braille converter by KANSYS, Inc.
--------a-2FFB-------------------------------
INT 2F U - AutoBraille v1.1A - SET ???
        AH = FBh
        AL = 10h-1Fh
        ???
Return: ???
--------a-2FFB20-----------------------------
INT 2F U - AutoBraille v1.1A - SET ??? FLAGS
        AX = FB20h
        BL = flags to set
SeeAlso: AX=FB21h"AutoBraille"
--------a-2FFB21-----------------------------
INT 2F U - AutoBraille v1.1A - CLEAR ??? FLAGS
        AX = FB21h
        BL = flags to clear
SeeAlso: AX=FB20h"AutoBraille"
--------a-2FFB22-----------------------------
INT 2F U - AutoBraille v1.1A - SET ???
        AX = FB22h
        BL = ???
Program: AutoBraille is a shareware text-to-braille converter by KANSYS, Inc.
--------a-2FFB28-----------------------------
INT 2F U - AutoBraille v1.1A - ???
        AX = FB28h
        BX = ???
        ???
Return: ???
SeeAlso: AX=FB29h"AutoBraille"
--------a-2FFB29-----------------------------
INT 2F U - AutoBraille v1.1A - ???
        AX = FB29h
        BX = ???
        ???
Return: ???
SeeAlso: AX=FB28h"AutoBraille"
--------a-2FFB-------------------------------
INT 2F U - AutoBraille v1.1A - SET ???
        AH = FBh
        AL = 2Bh-34h
        BX = ???
--------a-2FFB35-----------------------------
INT 2F U - AutoBraille v1.1A - SET ???
        AX = FB35h
        BL = ???
--------a-2FFB36-----------------------------
INT 2F U - AutoBraille v1.1A - SET ???
        AX = FB36h
        BL = ???
--------a-2FFB37-----------------------------
INT 2F U - AutoBraille v1.1A - SET ???
        AX = FB37h
        BL = ???
Program: AutoBraille is a shareware text-to-braille converter by KANSYS, Inc.
--------E-2FFB42BX0001-----------------------
INT 2F PU - Borland C++ DPMILOAD.EXE - INSTALLATION CHECK???
        AX = FB42h
        BX = 0001h
Return: AX = version number??? (AL=major, AH=minor)
        CX = next-selector increment
---BC2.0---
        ES:BX -> 80-byte buffer for ???
        DX = DPMI version
---BC3.0---
        BX = ??? (0000h)
        DX = ???
        ES:SI -> list of valid selectors ???
Notes:  The version of DPMILOAD distributed with BC++ v2.0 identifies itself
          as version 1.000, while the version distributed with BC++ 3.0
          identifies itself as version 1.0; the former is 10864 bytes, the
          latter 22180 bytes.  The BC2.0 version is a DPMI loader, while
          the BC3.0 version also adds a DPMI host and DOS extender
        the BC++ 2.0 version displays an error message if called with BX
          values other than 0001h-0008h
SeeAlso: AX=1687h,AX=FB42h/BX=1001h,AX=FB43h
--------E-2FFB42BX0002-----------------------
INT 2F PU - Borland C++ 2.0 DPMILOAD.EXE - ALLOCATE MEMORY
        AX = FB42h
        BX = 0002h
        CX = size in bytes
        DX = bit flags
            bit 2: set to allocate DOS memory, clear for DPMI memory
        SI = selector of descriptor to be modified to access allocated memory
        DI = selector of a second descriptor to be modified
Return: AX = ??? or 0000h on error
        CX:DX = linear base address of DPMI memory block
        SI:DI = handle for DPMI memory block or FFFFh:FFFFh
        ???
Note:   two segment descriptors may be set if a code and an aliased data
          segment are required; if only one descriptor is needed, SI should
          equal DI on entry
BUG:    when allocating DOS memory, the code computes the linear address by
          multiplying the segment number by 4 rather than shifting by 4
SeeAlso: AX=FB42h/BX=0003h,AX=FB42h/BX=0008h,INT 31/AX=0501h
--------E-2FFB42BX0002-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ALLOCATE MEMORY
        AX = FB42h
        BX = 0002h
        ES:SI -> memory block info (see #03127)
Return: ???
Note:   The version of DPMILOAD distributed with BC++ v2.0 identifies itself
          as version 1.000, while the version distributed with BC++ 3.0
          identifies itself as version 1.0; the former is 10864 bytes, the
          latter 22180 bytes.
SeeAlso: AX=FB42h/BX=0003h,AX=FB42h/BX=0008h,INT 31/AX=0501h

Format of DPMILOAD memory block info:
Offset  Size    Description     (Table 03127)
 00h    WORD    flags (see #03128)
 02h    DWORD   block size in bytes
---DPMI memory block---
 06h    DWORD   DPMI memory block handle
---DOS memory block---
 06h    WORD    real-mode segment of memory block
 08h    WORD    selector of memory block
---
 0Ah    DWORD   linear address of memory
 0Eh    WORD    memory operation error code
                0008h no more free LDT descriptors
---if flags bit 0 clear---
 10h    WORD    code segment selector for memory block or 0000h or FFFFh
 12h    WORD    data alias selector for memory block or 0000h or FFFFh
---if flags bit 0 set---
 10h    WORD    data segment selector for memory block or 0000h or FFFFh
 12h    WORD    unused???

Bitfields for DPMILOAD memory block flags:
Bit(s)  Description     (Table 03128)
 0      set if data segment rather than code segment
 1      information valid
 2      set if DOS memory block rather than DPMI memory block
 4      ???
 15     set if no LDT selectors for memory block???
SeeAlso: #03127
--------E-2FFB42BX0003-----------------------
INT 2F PU - Borland C++ DPMILOAD.EXE - GET AVAILABLE MEMORY
        AX = FB42h
        BX = 0003h
Return: DX:AX = size of largest free block in paragraphs
                0000h:0000h on error (BC3.0 version only)
Note:   AX and DX are destroyed on error, but no other error indicator is
          returned, under the BC++ 2.0 version of DPMILOAD
SeeAlso: AX=FB42h/BX=0002h
--------E-2FFB42BX0004-----------------------
INT 2F PU - Borland C++ DPMILOAD.EXE - LOAD PROTECTED-MODE EXECUTABLE???
        AX = FB42h
        BX = 0004h
        DS:DX -> ASCIZ filename of protected-mode executable
Return: CX = selector of ??? or 0000h
---BC3.0---
        DX = status (0000h,FFF4h,others???) (see #03129)
Note:   the filename may also be terminated by a CR rather than a NUL under the
          BC++ 3.0 version of DPMILOAD

(Table 03129)
Values for DPMILOAD function status:
 0000h  successful
 0001h  ??? failure
 0002h  invalid selector
 0004h  unknown error
 0008h  no more LDT descriptors available???
 FFDEh  unable to set descriptor
 FFDFh  unable to get segment base address
 FFE0h  ???
 FFF2h  invalid parameter value
 FFF4h  component of filename too long (name not in 8.3 format)
 FFF5h  pathname too long (>79 chars)
 FFF6h  ???
 FFF8h  ???
 FFF9h  index out of range
 FFFAh  ???
 FFFCh  invalid access to code segment???
 FFFEh  ???
 FFFFh  general error
--------E-2FFB42BX0005-----------------------
INT 2F PU - Borland C++ DPMILOAD.EXE - GET ADDRESS OF ??? BY NAME
        AX = FB42h
        BX = 0005h
        CX = selector of DPMILOAD data (see #03130)
        DS:DX -> ASCIZ or CR-terminated name of ??? (case ignored)
Return: DX = status (see #03129)
            0000h successful
                AX:BX -> ??? FAR function (called with two words on top of stk)
            else
                BX destroyed
SeeAlso: AX=FB42h/BX=0006h,AX=FB42h/BX=000Eh

Format of DPMILOAD data:
Offset  Size    Description     (Table 03130)
 00h 12 BYTEs   ???
 0Ch    WORD    ??? bit flags
 0Eh 14 BYTEs   ???
 1Ch    WORD    number of memory control records (see #03133)
 1Eh 25 BYTEs   ???
 37h    BYTE    ??? bit flags
                bit 4: data valid???
 38h  4 BYTEs   ???
 3Ch    WORD    ???
 3Eh 12 BYTEs   ???
 46h    BYTE    ??? counter
 47h    BYTE    ???
 48h    BYTE    ???
 49h    BYTE    ???
 4Ah    WORD    ???
 4Ch  2 BYTEs   ???
 4Eh    WORD    offset of array of 64-byte memory control records
 52h    WORD    offset of name list (see #03131)
 54h  4 BYTEs   ???
 58h    WORD    offset of array of 6-byte objects (see #03132)
 5Ah  8 BYTEs   ???
 62h  9 BYTEs   ASCIZ name for ???
 6Bh  9 BYTEs   ASCIZ name for ???
        ???

Format of name list entry [array]:
Offset  Size    Description     (Table 03131)
 00h    BYTE    length of name (00h if end of array)
 01h  N BYTEs   name
 N+1    WORD    1-based index into array of unknown 6-byte objects

Format of 6-byte objects:
Offset  Size    Description     (Table 03132)
 00h    BYTE    ???
 01h    BYTE    ???
 02h    BYTE    ???
 03h    BYTE    1-based index of memory control record
 04h    WORD    ???

Format of memory control record:
Offset  Size    Description     (Table 03133)
 00h 20 BYTEs   memory block info (see #03127)
 14h  6 BYTEs   ???
 1Ah    BYTE    ???
 1Bh  2 BYTEs   ???
 1Dh    BYTE    ??? bit flags
 1Eh 14 BYTEs   ???
 2Ch    DWORD   pointer to ??? memory control record or 0000h:0000h
 30h    DWORD   pointer to ??? memory control record or 0000h:0000h
 34h    DWORD   pointer to next??? memory control record or 0000h:0000h
 38h    DWORD   pointer to prev??? memory control record or 0000h:0000h
 3Ch  4 BYTEs   ???
Note:   the pointers at offsets 2Ch and 30h form a doubly-linked list, as do
          the pointers at offsets 34h and 38h
--------E-2FFB42BX0006-----------------------
INT 2F PU - Borland C++ DPMILOAD.EXE - GET ADDRESS OF ??? BY NUMBER
        AX = FB42h
        BX = 0006h
        CX = selector of DPMILOAD data (see #03130)
        DX = 1-based index into array of ??? 6-byte objects
Return: DX = status (see #03129)
            0000h successful
                AX:BX -> ??? FAR function (called with two words on top of stk)
            else
                BX destroyed
SeeAlso: AX=FB42h/BX=0005h,AX=FB42h/BX=000Eh
--------E-2FFB42BX0007-----------------------
INT 2F PU - Borland C++ 2.0 DPMILOAD.EXE - ???
        AX = FB42h
        BX = 0007h
        CX = selector of ???
Return: ???
Note:   The version of DPMILOAD distributed with BC++ v2.0 identifies itself
          as version 1.000, while the version distributed with BC++ 3.0
          identifies itself as version 1.0; the former is 10864 bytes, the
          latter 22180 bytes.
--------E-2FFB42BX0007-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
        AX = FB42h
        BX = 0007h
        CX = selector of DPMILOAD data (see #03130)
        ???
Return: DX = status (see #03129)
            0000h successful
                AX = ???
--------E-2FFB42BX0008-----------------------
INT 2F PU - Borland C++ 2.0 DPMILOAD.EXE - FREE MEMORY BLOCK
        AX = FB42h
        BX = 0008h
        CX = bit flags
            bit 2: set if DPMI memory, clear if DOS memory
        DX = selector of DOS memory block
        SI:DI = handle of DPMI memory block
Return: DX = 0000h on error, unchanged if succcessful
Note:   The version of DPMILOAD distributed with BC++ v2.0 identifies itself
          as version 1.000, while the version distributed with BC++ 3.0
          identifies itself as version 1.0; the former is 10864 bytes, the
          latter 22180 bytes.
SeeAlso: AX=FB42h/BX=0002h
--------E-2FFB42BX0008-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - FREE MEMORY BLOCK
        AX = FB42h
        BX = 0008h
        ES:SI -> memory block info (see #03127)
Return: ???
SeeAlso: AX=FB42h/BX=0009h
--------E-2FFB42BX0009-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - RESIZE MEMORY BLOCK
        AX = FB42h
        BX = 0009h
        ES:SI -> memory block info (see #03127)
        ???
Return: ???
SeeAlso: AX=FB42h/BX=0008h"3.0"
--------E-2FFB42BX000A-----------------------
INT 2F RU - Borland C++ 3.0 DPMILOAD.EXE - INIT DPMI HOST AND SPAWN SUBSHELL
        AX = FB42h
        BX = 000Ah
        CX = 0001h
        DX = ???
        SI = ???
Return: after user exits subshell
Notes:  this call is used by DPMIRES; unlike most of the DPMILOAD calls, this
          function is not available in protected mode.
        the BC2.0 version of DPMILOAD is purely a DPMI loader, while the BC3.0
          version also adds a DPMI host and DOS extender.
SeeAlso: AX=FB42h/BX=0004h,AX=FB42h/BX=0015h
--------E-2FFB42BX000B-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - UNUSED
        AX = FB42h
        BX = 000Bh
--------E-2FFB42BX000C-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - FREE DESCRIPTORS FOR MEMORY BLOCK???
        AX = FB42h
        BX = 000Ch
        ES:SI -> memory block info ??? (see #03127)
Return: DX = status???
SeeAlso: AX=FB42h/BX=000Fh
--------E-2FFB42BX000D-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - SIMULATE REAL MODE INTERRUPT
        AX = FB42h
        BX = 000Dh
        CX = number of words to copy from protected-mode to real mode stack
        DL = interrupt number
        DH = flags
            bit 0: reset the interrupt controller and A20 line
        ES:DI -> real-mode call structure (see #03148 at INT 31/AX=0300h)
Return: CX = status
            0000h successful
            0001h failed
SeeAlso: INT 31/AX=0300h
--------E-2FFB42BX000E-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - GET ADDRESS OF ???
        AX = FB42h
        BX = 000Eh
        DS:DX -> ASCIZ or CR-terminated name of ???
Return: CX = selector of DPMILOAD data (see #03130) corresponding to name,
              0000h on error
SeeAlso: AX=FB42h/BX=0006h,AX=FB42h/BX=001Fh
--------E-2FFB42BX000F-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - REALLOCATE LDT DESCRPS TO MEMBLK???
        AX = FB42h
        BX = 000Fh
        ES:SI -> memory block info (see #03127)
Return: ???
SeeAlso: AX=FB42h/BX=000Ch
--------E-2FFB42BX0010-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - CONVERT SEGMENT TO SELECTOR
        AX = FB42h
        BX = 0010h
        DX = segment number
Return: CX = status (0000h,0008h) (see also AX=FB42h/BX=0004h)
            0000h successful
                DX = selector number for descriptor
            0008h failed
SeeAlso: AX=FB42h/BX=0023h
--------E-2FFB42BX0011-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
        AX = FB42h
        BX = 0011h
        CX = selector of DPMILOAD data (see #03130)
        ???
Return: DX = status (0000h,0002h,FFFEh) (see also #03129)
            0000h successful
                AX:BX -> ??? name
            FFFEh ??? error
--------E-2FFB42BX0012-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
        AX = FB42h
        BX = 0012h
        CX = selector for ???
Return: CX = selector for ???
--------E-2FFB42BX0013-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
        AX = FB42h
        BX = 0013h
        CX = selector of DPMILOAD data (see #03130)
        DX = 1-based index of ???
Return: CX = status (0000h,0002h,FFF9h) (see also #03129)
            0000h successful
                BX = ??? or 0000h
            FFF9h ??? error
--------E-2FFB42BX0014-----------------------
INT 2F RU - Borland C++ 3.0 DPMILOAD.EXE - INSTALLATION CHECK
        AX = FB42h
        BX = 0014h
        CX = 0001h
Return: BX = 0000h if installed
Note:   unlike most of the DPMILOAD functions, this call is available only in
          real or V86 mode
SeeAlso: AX=FB42h/BX=0001h,AX=FB42h/BX=000Ah
--------E-2FFB42BX0015-----------------------
INT 2F RU - Borland C++ 3.0 DPMILOAD.EXE - UNINSTALL
        AX = FB42h
        BX = 0015h
        CX = 0001h
Return: ???
Note:   unlike most of the DPMILOAD functions, this call is available only in
          real or V86 mode
SeeAlso: AX=FB42h/BX=000Ah
--------E-2FFB42BX0016-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - GET ???
        AX = FB42h
        BX = 0016h
        CX = selector of DPMILOAD data (see #03130)
Return: DX = status (see also AX=FB42h/BX=0004h)
            0000h successful
                CX = ???
--------E-2FFB42BX0017-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
        AX = FB42h
        BX = 0017h
        CX = ???
        DX = ???
        ???
Return: DX = status (0000h,0001h) (see #03129)
--------E-2FFB42BX0018-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - SET ???
        AX = FB42h
        BX = 0018h
        CX = ???
--------E-2FFB42BX0019-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
        AX = FB42h
        BX = 0019h
        CX = selector for ???
        ???
Return: DX = status (see also AX=FB42h/BX=0004h)
            0000h successful
                CX = selector for ???
--------E-2FFB42BX001A-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
        AX = FB42h
        BX = 001Ah
        CX = selector for ???
        ???
Return: DX = status (see also AX=FB42h/BX=0004h)
            0000h successful
            0004h failed
        CX:BX -> ???
--------E-2FFB42BX001B-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
        AX = FB42h
        BX = 001Bh
        CX = selector of DPMILOAD data (see #03130)
        DX = offset of ???
Return: DX = status (0000h,0002h) (see also #03129)
            0000h successful
                BX = selector for ???
                CX = selector for ???
--------E-2FFB42BX001C-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
        AX = FB42h
        BX = 001Ch
        ES = selector for DPMILOAD data (see #03130)
        CX = 1-based index of ???
        DX = 1-based index of ???
Return: DX = status (0000h,0002h,FFF9h) (see #03129)
--------E-2FFB42BX001D-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - GET ???
        AX = FB42h
        BX = 001Dh
Return: CX:DX = ???
--------E-2FFB42BX001E-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
        AX = FB42h
        BX = 001Eh
        CX = ???
        ???
Return: DX = status (see also AX=FB42h/BX=0004h)
            0000h successful
            FFF7h ??? error
        CX:BX -> ???
--------E-2FFB42BX001F-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - GET ADDRESS OF ???
        AX = FB42h
        BX = 001Fh
        DS:DX -> 8-character name of ???
        ???
Return: CX = selector of DPMILOAD data (see #03130) for ???
                0000h on error
SeeAlso: AX=FB42h/BX=000Eh
--------E-2FFB42BX0020-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - NULL FUNCTION???
        AX = FB42h
        BX = 0020h
Return: DX = ??? (always 0000h)
--------E-2FFB42BX0021-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - GET PROCESSOR EXCEPTION HANDLER VECT
        AX = FB42h
        BX = 0021h
        CL = exception number (00h-1Fh)
Return: DX = status (see also AX=FB42h/BX=0004h)
            0000h successful
                AX:BX = selector:offset of handler
            FFF2h unable to get exception handler vector
SeeAlso: AX=FB42h/BX=0022h,AX=FB42h/BX=0024h,INT 31/AX=0202h
--------E-2FFB42BX0022-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - SET PROCESSOR EXCEPTION HANDLER VECT
        AX = FB42h
        BX = 0022h
        CL = exception number (00h-1Fh)
        SI:DX = selector:offset of new handler
Return: DX = status (0000h,0004h,FFF2h) (see #03129)
SeeAlso: AX=FB42h/BX=0021h,AX=FB42h/BX=0025h,INT 31/AX=0203h
--------E-2FFB42BX0023-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - CONVERT SELECTOR TO SEGMENT NUMBER
        AX = FB42h
        BX = 0023h
        CX = selector
Return: DX = status (see also AX=FB42h/BX=0004h)
            0000h successful
                CX = real-mode segment number
            FFF2h descriptor has invalid base address for real-mode segment
SeeAlso: AX=FB42h/BX=0010h
--------E-2FFB42BX0024-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - GET PROTECTED-MODE INTERRUPT VECTOR
        AX = FB42h
        BX = 0024h
        CL = interrupt number
Return: DX = status (0000h) (see also AX=FB42h/BX=0004h)
        AX:BX = selector:offset of handler
SeeAlso: AX=FB42h/BX=0025h,INT 31/AX=0204h
--------E-2FFB42BX0025-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - SET PROTECTED-MODE INTERRUPT VECTOR
        AX = FB42h
        BX = 0025h
        CL = interrupt number
        SI:DX = selector:offset of new handler
Return: DX = status (0000h,0004h,FFF2h) (see #03129)
SeeAlso: AX=FB42h/BX=0024h,INT 31/AX=0205h
--------E-2FFB42BX0026-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
        AX = FB42h
        BX = 0026h
        CX = selector of DPMILOAD data (see #03130)
        DX = 1-based index of ???
        ???
Return: DX = status (0000h,0002h,FFF9h) (see #03129)
            0000h successful
                BX = offset of ??? within data structure
--------E-2FFB42BX0027-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - GET ???
        AX = FB42h
        BX = 0027h
        CX = selector of DPMILOAD data (see #03130)
        DX = offset of ???
Return: DX = status (see also AX=FB42h/BX=0004h)
            0000h successful
                BX = ???
--------E-2FFB42BX0080-----------------------
INT 2F U - ??? - CALLED BY Borland C++ 3.0 DPMILOAD.EXE
        AX = FB42h
        BX = 0080h
        ???
Return: AX = ???
        ???
--------E-2FFB42BX0081-----------------------
INT 2F U - ??? - CALLED BY Borland C++ 3.0 DPMILOAD.EXE
        AX = FB42h
        BX = 0081h
        ???
Return: AX = ???
        ???
--------E-2FFB42BX1001-----------------------
INT 2F U - Borland RTM.EXE 1.0 - INSTALLATION CHECK???
        AX = FB42h
        BX = 1001h
Return: BX = 0000h
SeeAlso: AX=FB42h/BX=0001h,AX=FB42h/BX=1002h,AX=FB42h/BX=1003h
--------E-2FFB42BX1002-----------------------
INT 2F U - Borland RTM.EXE 1.0 - EXECUTE COMPILED PROGRAM
        AX = FB42h
        BX = 1002h
        DX = 0014h ???
        ???
Return: AX = nonzero if successful
            AH = child program exit method??? (usually 4Ch)
            AL = child program exit code (Errorlevel)
        AX = 0000h on load error
            DX = error code (0000h-0027h) (see #03134)
SeeAlso: AX=FB42h/BX=1001h

(Table 03134)
Values for RTM.EXE error code:
 01h    out of memory
 02h    out of selectors
 03h    out of internal tables
 10h    internal error
 18h    internal error
 1Ah    internal error
 1Bh    internal error
 1Ch    internal error
 20h    invalid dynamic link
 21h    internal error
 22h    unable to open file
 23h    invalid .EXE format
 24h    wrong version
 25h    unable to initialize 
 26h    DLL initialization error
 other  unrecognized error
--------E-2FFB42BX1003-----------------------
INT 2F U - Borland RTM.EXE 1.0 - ???
        AX = FB42h
        BX = 1003h
        ???
Return: ???
SeeAlso: AX=FB42h/BX=1001h
--------E-2FFB43-----------------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - NULL FUNCTION
        AX = FB43h
        BX = subfunction (at least 0000h-000Eh)
Notes:  this function is only present in protected mode; it does nothing but
          an immediate IRET
        DPMILOAD.EXE itself calls various subfunctions:
            subfunction 0004h is called with CX=selector of ???, DI=selector
                  of DPMILOAD data
            subfunction 0008h is called with CX=selector of DPMILOAD data
SeeAlso: AX=FB42h/BX=0001h
--------G-2FFB43BX0100-----------------------
INT 2F PU - Borland TDX - INSTALLATION CHECK
        AX = FB43h
        BX = 0100h
Return: BX = FB43h if loaded
Program: TDX is Borland's Turbo Debugger variant for DPMI programs
Note:   Borland Pascal 7 DPMI programs use this call to check whether they
          should install their own stack and general protection exception
          handlers, or allow TDX to handle those exceptions
--------a-2FFB64-----------------------------
INT 2F U - AutoBraille v1.1A - GET ???
        AX = FB64h
Return: AX = ??? (0006h seen)
Program: AutoBraille is a shareware text-to-braille converter by KANSYS, Inc.
--------E-2FFBA1BX0081-----------------------
INT 2F U - TKERNEL (Borland DOS extender) - INSTALLATION CHECK
        AX = FBA1h
        BX = 0081h
        ES:DI -> 16-byte buffer
Return: if installed, first four bytes of ES:DI buffer are "IABH"
Program: TKERNEL is a licensed version of AI Architects/Ergo's OS/x86.
Note:   TKERNEL was present only in Borland C++ 2.0; with version 3.0, the DOS
          extender was moved into DPMILOAD.
SeeAlso: AH=A1h,AX=F100h,AX=FBA1h/BX=0082h,AX=FBA1h/BX=0084h,INT 15/AX=BF02h
SeeAlso: INT 21/AX=4403h"AI Architects"
--------E-2FFBA1BX0082-----------------------
INT 2F U - TKERNEL (Borland DOS extender) - GET ENTRY POINT
        AX = FBA1h
        BX = 0082h
        ES:DI -> response buffer (see #03135)
Return: ES:DI buffer filled
SeeAlso: AX=FBA1h/BX=0081h,AX=FBA1h/BX=0084h

Format of TKERNEL response buffer:
Offset  Size    Description     (Table 03135)
 00h  4 BYTEs   signature "IABH"
 04h    DWORD   pointer to FAR extender entry point (see #03136)

(Table 03136)
Call TKERNEL entry point with:
        AX = function number
            0000h initialize???
                STACK:  WORD  ???
                Return: AX = status???
                        STACK unchanged
            0001h get version???
                Return: AX = 0200h for v2.0.34
            0002h get ???
                Return: AX = ??? (011Eh or 0182h seen)
            0003h load protected-mode executable
                STACK:  DWORD -> ASCIZ filename of executable
                        DWORD   ???
                        DWORD -> program arguments (counted string plus CR)
                        DWORD -> environment for protected-mode executable
                                (terminated with two consecutive NULs)
                        DWORD -> WORD buffer for ???
                Return: AX = status???
                        STACK unchanged
            0004h get descriptor
                STACK:  WORD    selector for which to get descriptor
                        WORD    segment number (when running in real mode)
                        DWORD -> buffer for descriptor
                Return: CF clear if successful
                            buffer filled
                        CF set on error
                            AX destroyed???
                        STACK unchanged
            0005h ???
                STACK:  WORD    selector for ???
                        WORD    subfunction number???
                                0000h run previously-loaded program???
                                0001h ??? (similar to 0000h)
                                0002h
                                0003h
                                0005h ??? (similar to 0000h and 0001h)
                Return: AX = status???
                        STACK unchanged
            0006h ???
                STACK:  WORD ???
                        DWORD -> WORD (call) max iterations of ???
                                      (ret) remaining iterations
                Return: AX = ???
                        STACK unchanged
            0007h unused
                Return: AX = 0001h
            0008h unused
                Return: AX = 0001h
            0009h copy protected-mode memory into conventional memory
                STACK:  WORD    selector for source segment
                        WORD    segment of source if in real mode???
                        DWORD   offset of source
                        WORD    number of bytes to copy
                        DWORD -> low-memory destination
                Return: AX = status
                        STACK unchanged
            000Ah copy conventional memory into protected-mode memory
                STACK:  WORD    selector for destination segment
                        WORD    segment of destination if in real mode???
                        DWORD   offset of destination
                        WORD    number of bytes to copy
                        DWORD -> low-memory source
                Return: AX = status
                        STACK unchanged
            000Bh get ??? pointers
                STACK:  WORD desired pointer
                                0000h get ???
                                0002h get protected-mode CR3
                                0003h get 4K page table buffer pointer
                                else Return: DX:AX = FFFFh:FFFFh
                Return: DX:AX = requested pointer
                        STACK unchanged
            000Ch set ??? pointers
                STACK:  WORD desired pointer
                                0000h set ???
                                0002h set protected-mode CR3
                                0003h set 4K page table buffer pointer
                                else ignore
                        DWORD new value for pointer
                Return: STACK unchanged
            000Dh get ??? pointers
                STACK:  WORD desired pointer
                                0000h get ???
                                0001h get ???
                                0002h get ???
                                0003h get ???
                                0004h get ???
                                0005h get ???
                                0006h get ???
                                0007h get ???
                                else Return: DX:AX = FFFFh:FFFFh
                Return: DX:AX = desired pointer
                        STACK unchanged
            000Eh set ??? pointer
                STACK:  WORD desired pointer
                                0000h set ???
                                0001h set ???
                                0002h set ???
                                0003h set ???
                                0004h set ???
                                0005h set ???
                                0006h set ???
                                0007h set ???
                                else Return: DX:AX = FFFFh:FFFFh
                Return: STACK unchanged
            000Fh get ???
                Return: AX = ??? (seen 0008h)
            0010h get ???
                Return: AX = ???
            0011h determine whether selector is valid
                STACK:  WORD    possible selector
                Return: AX = selector or 0000h if invalid
                        STACK unchanged
            0012h get physical address
                STACK:  WORD    selector for desired segment
                        WORD    segment number if in real mode
                        DWORD   offset within segment
                Return: DX:AX = 32-bit physical address or 00000000h on error
                        BX destroyed
                        STACK unchanged
            0013h ???
                Note:   normally jumps to code for function 0012h
            0014h copy protected-mode memory to conventional memory, with ???
                STACK:  WORD    selector for source segment
                        WORD    segment of source if in real mode???
                        DWORD   offset of source
                        WORD    number of bytes to copy
                        DWORD -> low-memory destination
                Return: AX = status???
                        STACK unchanged
            0015h copy conventional memory to protected-mode memory, with ???
                STACK:  WORD    selector for destination segment
                        WORD    segment of destination if in real mode???
                        DWORD   offset of destination
                        WORD    number of bytes to copy
                        DWORD -> low-memory source
                Return: AX = status???
                        STACK unchanged
            0016h set ??? pointer
                STACK:  WORD    unused
                        DWORD -> ??? or 0000h:0000h
                Return: AX = 0000h
                        STACK unchanged
            0017h allocate real-mode procedure???
                STACK:  DWORD   ASCIZ name of procedure
                        DWORD ???
                        DWORD   address of subroutine to invoke
                Return: AX = status
                            0032h procedure by that name exists
                            0033h no more real-mode procedures available
                        DX destroyed
                        STACK unchanged
            0018h unused
                Return: AX = 0001h
            0019h get parameter block
                Return: DX:AX -> parameter block (format unknown at this time,
                                  but 92h bytes)
                                  (preceded by signature "!!PARAM-BLOCK!!")
            001Ah get ???
                Return: AX = ??? (0148h seen)
            001Bh free real-mode procedure???
                STACK:  DWORD -> ASCIZ name of procedure
                Return: ???
                        STACK unchanged
            001Ch check whether packets from protected mode task pending
                Return: AX = 0001h if packets pending, 0000h if not
            001Dh set ???
                STACK:  DWORD ??? or 0000h:0000h
                Return: AX,BX destroyed
                        STACK unchanged
            001Eh ???
                STACK:  WORD ??? (high byte ignored)
                        DWORD -> data structure (below)
                Return: AX,BX,CX,DX destroyed
                        data structure updated
                        STACK unchanged
                Format of data structure:
                Offset  Size    Description
                 00h  2 BYTEs   unused
                 02h    WORD    ???
                 04h    WORD    ???
                 06h    WORD    ???
                 08h  2 BYTEs   unused
                 0Ah    WORD    ???
                 0Ch    WORD    (call) ???
                                (ret) offset of this data structure (BUG?)
            001Fh set ???
                STACK:  WORD ??? (set to 0001h if zero)
                Return: AX destroyed
                        STACK unchanged
            0020h ???
                STACK:  DWORD -> ??? (8 bytes of data)
                Return: AX = ???
                        STACK unchanged
            0021h ???
                STACK:  DWORD -> ??? (8 bytes of data)
                        WORD    ???
                        WORD    ???
                Return: AX = ???
                        STACK unchanged
            0022h ???
                STACK:  DWORD -> ??? (8 bytes of data)
                        DWORD -> 4-byte buffer for results
                Return: AX = ???
                        STACK unchanged
            0023h ???
                STACK:  DWORD -> ??? (8 bytes of data)
                Return: AX = ???
                        STACK unchanged
            0024h set ???
                STACK:  WORD ???
                Return: AX destroyed
                        STACK unchanged
            0025h get ???
                Return: AX = ??? (value set with func 0024h)
            0026h BUG: jumps to hyperspace due to fencepost error
            FFFFh set DOS memory management functions
                BX:SI -> FAR routine for allocating DOS memory
                          (called with AH=48h,BX=number of paragraphs to alloc;
                          returns CF clear, AX=segment of allocated memory, or
                                  CF set on error)
                CX:DI -> FAR routine for freeing DOS memory
                          (called with AH=49h,ES=segment of block to free;
                          returns CF set on error, AX=error code)
                Note: each of these pointers normally points at INT 21/RETF
            other Return: AX = 0001h
Note:   BX may be destroyed by any of the API calls
--------E-2FFBA1BX0084-----------------------
INT 2F U - TKERNEL (Borland DOS extender) - UNINSTALL
        AX = FBA1h
        BX = 0084h
        ES:DI -> response buffer (see #03137)
Return: ES:DI buffer filled
SeeAlso: AX=FBA1h/BX=0081h,AX=FBA1h/BX=0084h

Format of TKERNEL response buffer:
Offset  Size    Description     (Table 03137)
 00h  4 BYTEs   signature "IABH"
 04h    WORD    success indicator
                0001h failed (INT 2F hooked by another program)
                unchanged if successful
 06h    WORD    segment of ???
 08h    WORD    segment of ??? memory block to free if nonzero
 0Ah    WORD    segment of ??? memory block to free if nonzero
--------s-2FFBFBES0000-----------------------
INT 2F U - SoundBlaster speech driver - INSTALLATION CHECK
        AX = FBFBh
        ES = 0000h
Return: ES nonzero if installed
            ES:BX -> entry point data structure (see #03138)
SeeAlso: INT 80/BX=0000h,INT F3"SoundBlaster"

Format of SoundBlaster entry point data structure:
Offset  Size    Description     (Table 03138)
 00h  3 BYTEs   signature "FB "
 03h    BYTE    driver major version number???
 04h    DWORD   speech driver entry point (see #03139)
 08h 24 BYTEs   ???
 20h  ? BYTEs   data buffer for calling speech driver
                  (can be 117 bytes or more)

(Table 03139)
Call SoundBlaster speech driver entry point with:
        AL = function
            07h speak a string
                data buffer (see #03138) contains:
                        BYTE  length of string
                      N BYTEs string to speak
--------K-2FFD12-----------------------------
INT 2F - KS/KEYSTKCT.EXE - INSTALLATION CHECK
        AX = FD12h
Return: AX = 0093h if installed
            ES = resident code segment
            ES:CX -> internal "putbuf" routine
Program: KS/KEYSTKCT.EXE is a key stacking utility (4DOS KEYSTACK.SYS
          look-alike) by Martin Gerdes, published in c't 11/1991, which can be
          loaded as a device driver or as a TSR. It does not emulate 4DOS
          KSTACK API
Note:   the default buffer size is 128 keys
--------N-2FFE00BX4454-----------------------
INT 2F - PC-NFS ??? - INSTALLATION CHECK
        AX = FE00h
        BX = 4454h ("DT")
        CX = 4B52h ("KR")
        DX = 4E4Dh ("NM")
Return: AL = FFh if installed
           BX = 524Eh ("RM")
           CX = 4D44h ("MD")
           DX = 544Bh ("TK")
Note:   DV/X 1.10 DVPCNFS.DVR searches AH=FEh,FFh,C0h-FDh for a valid response
SeeAlso: AX=FE08h
--------N-2FFE00BX4454-----------------------
INT 2F - PC-NFS ??? - INSTALLATION CHECK
        AX = FE00h
        BX = 4454h ("DT")
        CX = 4B52h ("KR")
        DX = 544Dh ("TM")
Return: AL = FFh if installed
           BX = 5254h ("RT")
           CX = 4D44h ("MD")
           DX = 544Bh ("TK")
Note:   DV/X 1.10 DVPCNFS.DVR searches AH=FEh,FFh,C0h-FDh for a valid response
SeeAlso: AX=FE08h
--------U-2FFE00DI4E55-----------------------
INT 2F U - NORTON UTILITIES 5.0+ TSRs - INSTALLATION CHECK/STATUS REPORT
        AX = FE00h
        DI = 4E55h ("NU")
        SI = TSR identifier (see #03140)
Return: SI = TSR reply
            lowercase version of SI on entry (i.e. SI ORed with 2020h)
            execpt SMARTCAN v8.0, which returns SI=6673h ('fs')
        AH = status
            00h installed but disabled internally
            01h installed and enabled
        AL = installed product
            00h NCACHE-x or DISKREET
            01h SPEEDRV / FILESAVE / EP / DISKMON v6+ installed
            02h NCACHE2 / SMARTCAN
            45h DISKMON v5 installed
        BX = length of *.INI file (DISKMON and FILESAVE/EP/SMARTCAN only)
              (see #03141,#03142)
        CX = segment of resident portion
            FFFFh if completely loaded high (NCACHE)
        DI may be destroyed
---FILESAVE/EP---
        DL = ??? (apparently always 00h)
---DISKMON---
        DX = ??? (apparently always 1AE6h [v5] / 1B86h [v6] / 1C26h [v7])
Notes:  the value returned in CX is incorrect for NCACHE 6.00
        all Norton Caches install as SMARTAAR drivers like SMARTDRV v3
        NCACHE2 and SPEEDRV both support the SMARTDRV v4+ installation check
        to detect Diskreet NDisk drives use CDS/DPB (see INT 21/AH=52h)
SeeAlso: AX=4A10h/BX=0000h,AX=FE01h,AX=FE02h,AX=FE03h,AX=FE04h,AX=FE05h
SeeAlso: INT 21/AX=4402h"SMARTDRV"

(Table 03140)
Values for Norton Utilities TSR identifier:
 4346h  ("CF") NCACHE-F (v5) / NCACHE (v6) / NCACHE2 (v7+) / SPEEDRV
 4353h  ("CS") NCACHE-S (v5 only)
 4443h  ("DC") DISKREET
 444Dh  ("DM") DISKMON
 4653h  ("FS") FILESAVE (v5) / EP (v6) / SMARTCAN (v7+)

Format of DISKMON.INI file:
Offset  Size    Description     (Table 03141)
-6Ch 108 BYTEs  (in memory copy only)
                list of filenames which are always protected:
                  IBMBIO.COM/IBMDOS.COM, IO.SYS/MSDOS.SYS, TBIOS.SYS/TDOS.SYS,
                  MIO.SYS/IO.BIN, COMMAND.COM
 00h    BYTE    ??? always 01h
 01h    BYTE    disk light (00h off, 01h on)
 02h    BYTE    disk protection (00h off, 01h on)
 03h    BYTE    protected areas
                01h system area
                02h files
                03h system area and files
                04h entire disk
 04h    BYTE    floppy access (00h not allowed, 01h allowed)
 05h 27 BYTEs   filename extension list (9 entries)
                (lowercase, blank padded or = 000000h)
 20h 240 BYTEs  filename list (20 entries)
                (lowercase, name and extension blank padded, with '.')
Note:   CX:0508h -> copy in installed TSR (v5)
        CX:052Fh -> copy in installed TSR (v6)
        CX:04E0h -> copy in installed TSR (v7-v8)

Format of FILESAVE.INI / EP.INI / SMARTCAN.INI file:
Offset  Size    Description     (Table 03142)
 00h 26 BITs    drive list (bit set: file protection on, cleared: off):
 00h    BYTE    drives  A: - H:
 01h    BYTE    drives  I: - P:
 02h    BYTE    drives  Q: - X:
 03h    BYTE    drives  Y: - Z:
 04h    BYTE    which files to protect
                00h all files
                01h all files with extension in list
                02h all files except those with extension in list
 05h 27 BYTEs   filename extension list (9 entries, uppercase, ASCIZ)
 20h    BYTE    include files with archive bit clear (00h no, 01h yes)
 21h    WORD    number of days after which files are purged (0 = never)
 23h    WORD    max kilobytes of erased file space to hold (0 = all)
Note:   CX:03D2h -> copy in installed TSR (v5)
        CX:03F5h -> copy in installed TSR (v6)
        CX:0434h -> copy in installed TSR (v7-v8)
--------U-2FFE00DX474F-----------------------
INT 2F - GO! v3.22+ - API
        AX = FE00h
        DX = 474Fh ('GO')
        SI = function number
            0063h (BCD for '?') installation check
            0078h (BCD for 'N') non-registered search (two levels only)
            0082h (BCD for 'R') reserved for registered version
            0083h (BCD for 'S') reserved for registered version
            0085h (BCD for 'U') uninstall
        BX:CX -> buffer (for search functions)
                buffer filled with search spec, i.e. "APL" to get first
                  directory containing the substring APL, ":\APL" to find
                  the first top-level directory beginning with the letters
                  APL
Return: BX:CX buffer filled with result (search functions only)
                result is counted ASCIZ directory name, empty string if
                no matches (i.e. first byte is length of name, followed by
                name)
Program: GO! is a shareware directory locator TSR by Steve Ryckman
Note:   the application-supplied buffer for the requests and results which
          BX:CX points at must lie outside the conventional (low-640K)
          memory, since the TSR swaps memory on pop-up; a common location is
          the last 96 bytes of the video memory or a UMB
--------U-2FFE01DI4E55-----------------------
INT 2F U - NORTON UTILITIES 5.0+ TSRs - ENABLE
        AX = FE01h
        DI = 4E55h ("NU")
        SI = TSR identifier (see #03140)
Return: SI = TSR reply (lowercase version of entry SI, i.e. SI OR 2020h)
        AX = status
            0002h successful (DISKMON, FILESAVE, EP)
            FE00h successful (NCACHE-x, DISKREET)
Notes:  if the enable/disable calls are used on DISKMON or NCACHE-x, the status
          report generated by the programs still indicates the previous state,
          and DISKMON.INI is not updated
        apparently has no effect on DISKREET
SeeAlso: AX=FE00h,AX=FE02h
--------U-2FFE02DI4E55-----------------------
INT 2F U - NORTON UTILITIES 5.0+ TSRs - DISABLE
        AX = FE02h
        DI = 4E55h ("NU")
        SI = TSR identifier (see #03140)
Return: SI = TSR reply (lowercase version of entry SI, i.e. SI OR 2020h)
        AX = status
            0004h successful (DISKMON, FILESAVE)
            FE00h successful (NCACHE-x, DISKREET)
Notes:  (see also AX=FE01h)
        this function appears to be unsafe, as the cache buffers are not
          flushed
SeeAlso: AX=FE00h,AX=FE01h
--------U-2FFE03DI4E55-----------------------
INT 2F U - NORTON UTILITIES 5.0+ TSRs - FLUSH BUFFERS
        AX = FE03h
        DI = 4E55h ("NU")
        SI = TSR identifier (see #03140)
Return: SI = TSR reply (lowercase version of entry SI, i.e. SI OR 2020h)
        AX = status
            0006h successful???
Notes:  only supported by DISKMON, FILESAVE, and NCACHE-x
        useful for flushing NCACHE before rebooting
SeeAlso: AX=FE00h,AX=FE10h
--------U-2FFE04DI4E55-----------------------
INT 2F U - NORTON UTILITIES 5.0+ DISKMON, FILESAVE / EP - internal - ???
        AX = FE04h
        DI = 4E55h ("NU")
        SI = TSR identifier (see #03140)
Return: SI = TSR reply (lowercase version of entry SI, i.e. SI or 2020h)
        AX = status
            0008h successful???
SeeAlso: AX=FE00h
--------U-2FFE05DI4E55-----------------------
INT 2F U - NORTON UTILITIES 5.0+ DISKMON, FILESAVE / EP - internal - ???
        AX = FE05h
        DI = 4E55h ("NU")
        SI = TSR identifier (see #03140)
Return: SI = TSR reply (lowercase version of entry SI, i.e. SI or 2020h)
        AX = status
            000Ah successful???
Note:   reportedly dangerous
SeeAlso: AX=FE00h
--------N-2FFE08-----------------------------
INT 2F - PC-NFS ??? - GET ???
        AX = FE08h
Return: ES:BX -> ???
Notes:  DV/X 1.10 DVPCNFS.DVR searches AH=FEh,FFh,C0h-FDh for a valid response
        both the driver responding to AX=FE00h/DX=4E4Dh and the one responding
          to AX=FE00h/DX=544Dh support this function
SeeAlso: AX=FE00h/BX=4454h
--------U-2FFE10DI4E55-----------------------
INT 2F U - NORTON UTILITIES 6.0 NCACHE - REBOOT
        AX = FE10h
        DI = 4E55h ("NU")
        SI = TSR identifier (see #03140)
Return: SI = TSR reply (lowercase version of entry SI, i.e. SI or 2020h)
        AX = status
Note:   probably used to flush NCACHE buffers and reboot when Ctrl-Alt-Del is
          detected
SeeAlso: AX=FE03h
--------S-2FFEEF-----------------------------
INT 2F - RTS Control TSR - INSTALLATION CHECK
        AX = FEEFh
Return: AX = EFFEh if installed
            BX = port address
Program: RTS Control TSR is a utility by Michal Szokolo to lower the RTS
          signal on a COM port during disk accesses to avoid losing incoming
          data
--------N-2FFF00-----------------------------
INT 2F - Topware Network Operating System - INSTALLATION CHECK
        AX = FF00h
Return: AL = status
            00h not installed, OK to install
            01h not installed, not OK to install
            FFh installed
SeeAlso: AX=FF01h,AX=FF02h,AX=FF10h,INT 21/AX=FF00h"Topware",INT 7A"Topware"
--------N-2FFF01-----------------------------
INT 2F - Topware Network Operating System - GET VERSION
        AX = FF01h
Return: AX = version
SeeAlso: AX=FF00h,AX=FF02h
--------N-2FFF02-----------------------------
INT 2F - TopWare Network OS v5.10+ - GET TopNet VERSION STRING
        AX = FF02h
Return: ES:BX -> version string
SeeAlso: AX=FF00h,AX=FF01h
--------N-2FFF10-----------------------------
INT 2F - TopWare Network OS v5.10+ - TopTerm - INSTALLATION CHECK
        AX = FF10h
Return: AL = status (00h not installed, 01h installed)
SeeAlso: AX=FF00h,AX=FF11h,AX=FF12h,AX=FF13h
--------N-2FFF11-----------------------------
INT 2F - TopWare Network OS v5.10+ - TopTerm - ENABLE KEYBOARD SERVICE
        AX = FF11h
Note:   this function is only available on workstations, not on the server
SeeAlso: AX=FF10h,AX=FF12h
--------N-2FFF12-----------------------------
INT 2F - TopWare Network OS v5.10+ - TopTerm - DISABLE KEYBOARD SERVICE
        AX = FF12h
Note:   this function is only available on workstations, not on the server
SeeAlso: AX=FF10h,AX=FF11h
--------N-2FFF13-----------------------------
INT 2F - TopWare Network OS v5.10+ - TopTerm - SET INSTALLATION FLAG
        AX = FF13h
        CL = new state (00h off, 01h on)
SeeAlso: AX=FF10h
--------N-2FFF14-----------------------------
INT 2F - TopWare Network OS v5.10+ - START BACKGROUND RECEIVE VIDEO DATA
        AX = FF14h
Note:   this function is only available on workstations, not on the server
SeeAlso: AX=FF10h,AX=FF15h
--------N-2FFF15-----------------------------
INT 2F - TopWare Network OS v5.10+ - END BACKGROUND RECEIVE VIDEO DATA
        AX = FF15h
Note:   this function is only available on workstations, not on the server
SeeAlso: AX=FF10h,AX=FF14h
--------N-2FFF16-----------------------------
INT 2F - TopWare Network OS v5.10+ - SET CONTROL NUMBER OF "SHOW" SCREEN
        AX = FF16h
        BL = which to set (00h TopShow, FFh TopTerm)
        CX = destination screen
            0000h all stations
            0000h-00FFh (TopTerm only) send to group CL
            8001h-80FEh send to station CL
SeeAlso: AX=FF18h
--------N-2FFF18-----------------------------
INT 2F - TopWare Network OS v5.10+ - SEND FULL SCREEN OF DATA FOR TopShow
        AX = FF18h
SeeAlso: AX=FF00h,AX=FF16h,AX=FF27h
--------N-2FFF23-----------------------------
INT 2F - TopWare Network OS v5.10+ - CLOSE SPOOL FILES AND START PRINTING
        AX = FF23h
SeeAlso: AX=FF00h
--------N-2FFF27-----------------------------
INT 2F - TopWare Network OS v5.10+ - GET "SHOW" TYPE
        AX = FF27h
Return: AL = type (00h complete version, 01h simple version)
        BL = "show" functions flag (00h disabled, 01h enabled)
SeeAlso: AX=FF16h,AX=FF18h
--------D-30---------------------------------
INT 30 - (NOT A VECTOR!) - DOS 1+ - FAR JMP instruction for CP/M-style calls
   the CALL 5 entry point does a FAR jump to here
Note:   under DOS 2+, the instruction at PSP:0005 points two bytes too low in
          memory
SeeAlso: INT 21/AH=26h
--------V-30---------------------------------
INT 30 - QRIP/TSR - USED BY GRAPHICS LIBRARY
Program: QRIP/TSR is a shareware TSR by Shane Hathaway implementing the Remote
          Imaging Protocol (RIP, RIPscrip) used by several BBS systems to
          provide a graphical user interface
SeeAlso: INT 2F/AX=ACF0h
--------W-30---------------------------------
INT 30 P - MS Windows 3.1+ - PROTECTED-MODE CALLBACK
SeeAlso: INT 20"Windows"
--------!---Section--------------------------
Interrupt List, part 14 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------D-31---------------------------------
INT 31 - overwritten by CP/M jump instruction in INT 30
--------v-31---------------------------------
INT 31 - VIRUS - "Vacsina" series - INSTALLATION CHECK (NOT A VECTOR!)
Note:   if one of the Vacsina viruses is resident, the low byte of this
          interrupt still contains the last byte of the INT 30 CP/M JMP
          instruction, but the remaining three bytes are 7Fh 39h followed
          by the Vacsina version number
SeeAlso: INT 21/AX=FFFFh"VIRUS",INT 32"VIRUS"
--------E-310000-----------------------------
INT 31 P - DPMI 0.9+ - ALLOCATE LDT DESCRIPTORS
        AX = 0000h
        CX = number of descriptors to allocate
Return: CF clear if successful
            AX = base selector
        CF set on error
            AX = error code (DPMI 1.0+) (see #03143)
Notes:  DPMI is the DOS Protected-Mode Interface
        the base and limit of the returned descriptors will be 0, and the type
          will be "data"
        add the value returned by INT 31/AX=0003h to move to subsequent
          descriptors if multiple descriptors were allocated
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0001h,AX=000Dh,INT 21/AX=3501h

(Table 03143)
Values for DPMI 1.0 error code:
 0000h-7FFFh DOS error passed through by DPMI
 8001h  unsupported function
 8002h  object in wrong state for function
 8003h  system integrity would be endangered
 8004h  deadlock detected
 8005h  pending serialization request cancelled
 8010h  out of DPMI internal resources
 8011h  descriptor unavailable
 8012h  linear memory unavailable
 8013h  physical memory unavailable
 8014h  backing store unavailable
 8015h  callback unavailable
 8016h  handle unavailable
 8017h  maximum lock count exceeded
 8018h  shared memory already serialized exclusively by another
 8019h  shared memory already serialized shared by another client
 8021h  invalid value for numeric or flag parameter
 8022h  invalid segment selector
 8023h  invalid handle
 8024h  invalid callback
 8025h  invalid linear address
 8026h  request not supported by hardware
--------E-310001-----------------------------
INT 31 P - DPMI 0.9+ - FREE LDT DESCRIPTOR
        AX = 0001h
        BX = selector to free
Return: CF clear if successful
        CF set on error
            AX = error code (DPMI 1.0+) (8022h) (see #03143)
Notes:  only one descriptor is freed per call
        the program's initial CS, DS, and SS descriptors may be freed
        (DPMI 1.0+) any segment registers containing the freed selector are
          set to 0000h
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0000h,AX=000Ah,AX=000Dh,INT 21/AX=3502h
--------E-310002-----------------------------
INT 31 P - DPMI 0.9+ - SEGMENT TO DESCRIPTOR
        AX = 0002h
        BX = real mode segment
Return: CF clear if successful
            AX = selector corresponding to real mode segment (64K limit)
        CF set on error
            AX = error code (DPMI 1.0+) (8011h) (see #03143)
Notes:  multiple calls for the same real mode segment return the same selector
        the returned descriptor can never be modified or freed
        not supported by MS Windows 3.0 in Standard mode
--------E-310003-----------------------------
INT 31 P - DPMI 0.9+ - GET NEXT SELECTOR INCREMENT VALUE
        AX = 0003h
Return: CF clear
            AX = value to add to get next sequential selector
Notes:  the increment will be a power of two
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0000h
--------E-310004-----------------------------
INT 31 P - DPMI 0.9+ - LOCK SELECTOR
        AX = 0004h
        BX = selector to lock (prevent paging)
Return: ???
Note:   although marked as reserved in versions 0.9 and 1.0 of the DPMI
          specification, this function is called by MS Windows TASKMAN,
          PROGMAN, and KERNEL
SeeAlso: AX=0005h,AX=0600h
--------E-310005-----------------------------
INT 31 P - DPMI 0.9+ - UNLOCK SELECTOR
        AX = 0005h
        BX = selector to unlock (permit paging)
Return: ???
Note:   although marked as reserved in versions 0.9 and 1.0 of the DPMI
          specification, this function is called by MS Windows TASKMAN,
          PROGMAN, and KERNEL
SeeAlso: AX=0004h,AX=0601h
--------E-310006-----------------------------
INT 31 P - DPMI 0.9+ - GET SEGMENT BASE ADDRESS
        AX = 0006h
        BX = selector
Return: CF clear if successful
            CX:DX = linear base address of segment
        CF set on error
            AX = error code (DPMI 1.0+) (8022h) (see #03143)
Note:   not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0007h,INT 21/AX=3504h
--------E-310007-----------------------------
INT 31 P - DPMI 0.9+ - SET SEGMENT BASE ADDRESS
        AX = 0007h
        BX = selector
        CX:DX = linear base address
Return: CF clear if successful
        CF set on error
            AX = error code (DPMI 1.0+) (8022h,8025h) (see #03143)
Notes:  only modify descriptors allocated with INT 31/AX=0000h
        only the low 24 bits of the address will be used by 16-bit DPMI
          implementations even on a 386 or higher
        DPMI 1.0+ automatically reloads any segment registers containing the
          selector being modified
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0006h,AX=0008h,AX=0009h,AX=000Ch,INT 21/AX=3503h
SeeAlso: INT 21/AH=E9h"OS/286",INT 2C/AX=0002h
--------E-310008-----------------------------
INT 31 P - DPMI 0.9+ - SET SEGMENT LIMIT
        AX = 0008h
        BX = selector
        CX:DX = segment limit
Return: CF clear if successful
        CF set on error
            AX = error code (DPMI 1.0+) (8021h,8022h,8025h) (see #03143)
Notes:  CX must be zero for 16-bit DPMI implementations
        limits greater than 1MB must be page aligned (low 12 bits set)
        only modify descriptors allocated with INT 31/AX=0000h
        DPMI 1.0+ automatically reloads any segment registers containing the
          selector being modified
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0007h,AX=0009h,AX=000Ch,INT 21/AX=3505h,INT 21/AH=E9h"OS/286"
SeeAlso: INT 2C/AX=0003h,#00501 at INT 15/AH=89h
--------E-310009-----------------------------
INT 31 P - DPMI 0.9+ - SET DESCRIPTOR ACCESS RIGHTS
        AX = 0009h
        BX = selector
        CL = access rights/type byte (see #00502 at INT 15/AH=89h)
        CH = 80386 extended rights/type byte (see #00505 at INT 15/AH=89h)
            (32-bit DPMI implementations only)
Return: CF clear if successful
        CF set on error
            AX = error code (DPMI 1.0+) (8021h,8022h,8025h) (see #03143)
Notes:  if the Present bit is clear, CL bits 0-3 may have any value
        DPMI 1.0+ automatically reloads any segment registers containing the
          selector being modified
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0007h,AX=0008h,AX=000Ch,INT 21/AX=2514h,INT 2C/AX=0004h
SeeAlso: INT 2C/AX=0005h
--------E-31000A-----------------------------
INT 31 P - DPMI 0.9+ - CREATE ALIAS DESCRIPTOR
        AX = 000Ah
        BX = selector
Return: CF clear if successful
            AX = new data selector
        CF set on error
            AX = error code (DPMI 1.0+) (8011h,8022h) (see #03143)
Notes:  fails if selector in BX is not a code segment or is invalid
        use INT 31/AX=0001h to free new selector
        future changes to the original selector will not be reflected in the
          returned alias selector
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0001h
--------E-31000B-----------------------------
INT 31 P - DPMI 0.9+ - GET DESCRIPTOR
        AX = 000Bh
        BX = LDT selector
        ES:(E)DI -> 8-byte buffer for copy of descriptor
Return: CF clear if successful
            buffer filled
        CF set on error
            AX = error code (DPMI 1.0+) (8022h) (see #03143)
Notes:  16-bit programs use ES:DI as pointer, 32-bit must use ES:EDI
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=000Ch
--------E-31000C-----------------------------
INT 31 P - DPMI 0.9+ - SET DESCRIPTOR
        AX = 000Ch
        BX = LDT selector
        ES:(E)DI -> 8-byte buffer containing descriptor
Return: CF clear if successful
        CF set on error
            AX = error code (DPMI 1.0+) (8021h,8022h,8025h) (see #03143)
Notes:  16-bit programs use ES:DI as pointer, 32-bit must use ES:EDI
        only modify descriptors allocated with INT 31/AX=0000h
        DPMI 1.0+ automatically reloads any segment registers containing the
          selector being modified
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=000Bh
--------E-31000D-----------------------------
INT 31 P - DPMI 0.9+ - ALLOCATE SPECIFIC LDT DESCRIPTOR
        AX = 000Dh
        BX = LDT selector
Return: CF clear if successful
            descriptor allocated
        CF set on error
            AX = error code (DPMI 1.0+) (8011h,8022h) (see #03143)
Notes:  free descriptor with INT 31/AX=0001h
        the first 16 descriptors (04h-7Ch) are reserved for this function, but
          some may already be in use by other applications under DPMI 0.9;
          DPMI 1.0 guarantees 16 descriptors per client
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0000h,AX=0001h
--------E-31000E-----------------------------
INT 31 P - DPMI 1.0+ - GET MULTIPLE DESCRIPTORS
        AX = 000Eh
        CX = number of descriptors to copy
        ES:(E)DI -> descriptor buffer (see #03144)
Return: CF clear if successful
            descriptors copied
        CF set on error
            AX = error code (8022h) (see #03143)
            CX = number of descriptors successfully copied
Notes:  16-bit programs use ES:DI as pointer, 32-bit must use ES:EDI
        if the function fails, the first CX descriptors are valid; the
          remainder are not modified
SeeAlso: AX=000Bh,AX=000Fh

Format of DPMI descriptor buffer entry (one per descriptor to get):
Offset  Size    Description     (Table 03144)
 00h    WORD    selector (set by client)
 02h    QWORD   descriptor (set by host)
--------E-31000F-----------------------------
INT 31 P - DPMI 1.0+ - SET MULTIPLE DESCRIPTORS
        AX = 000Fh
        CX = number of descriptors to copy
        ES:(E)DI -> descriptor buffer (see #03145)
Return: CF clear if successful
            descriptors copied
        CF set on error
            AX = error code (8021h,8022h,8025h) (see #03143)
            CX = number of descriptors successfully copied
Notes:  16-bit programs use ES:DI as pointer, 32-bit must use ES:EDI
        if the function fails, the first CX descriptors are valid; the
          remainder are not modified
        DPMI 1.0+ automatically reloads any segment registers containing a
          selector being modified
SeeAlso: AX=000Ch,AX=000Eh

Format of DPMI descriptor buffer entry (one per descriptor to set):
Offset  Size    Description     (Table 03145)
 00h    WORD    selector
 02h    QWORD   descriptor
--------E-310100-----------------------------
INT 31 P - DPMI 0.9+ - ALLOCATE DOS MEMORY BLOCK
        AX = 0100h
        BX = number of paragraphs to allocate
Return: CF clear if successful
            AX = real mode segment of allocated block
            DX = first selector for allocated block
        CF set on error
            AX = DOS error code (07h,08h) (see #01680 at INT 21/AH=59h/BX=0000h)
                (DPMI 1.0+) DPMI error code (8011h) (see #03143)
            BX = size (in paragraphs) of largest available block
Notes:  multiple contiguous selectors are allocated for blocks of more than 64K
          if the caller is a 16-bit program
        never modify or deallocate returned descriptors
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0101h,AX=0501h
--------E-310101-----------------------------
INT 31 P - DPMI 0.9+ - FREE DOS MEMORY BLOCK
        AX = 0101h
        DX = selector of block
Return: CF set if successful
        CF set on error
            AX = DOS error code (07h,09h) (see #01680 at INT 21/AH=59h/BX=0000h)
Notes:  all descriptors allocated for the block are automatically freed
        DPMI 1.0+ automatically zeros any segment registers containing a
          selector freed by this function
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0100h,AX=0102h,AX=0502h
--------E-310102-----------------------------
INT 31 P - DPMI 0.9+ - RESIZE DOS MEMORY BLOCK
        AX = 0102h
        BX = new block size in paragraphs
        DX = selector of block
Return: CF clear if successful
        CF set on error
            AX = DOS error code (07h,08h,09h)
                  (see #01680 at INT 21/AH=59h/BX=0000h)
                (DPMI 1.0+) DPMI error code (8011h,8022h) (see #03143)
            BX = maximum block size (in paragraphs) possible
Notes:  increasing the size of a block past a 64K boundary will fail if the
          next descriptor in the LDT is already in use
        shrinking a block past a 64K boundary will cause some selectors to be
          freed; DPMI 1.0+ automatically zeros any segment registers containing
          a selector freed by this function
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0100h
--------E-310200-----------------------------
INT 31 P - DPMI 0.9+ - GET REAL MODE INTERRUPT VECTOR
        AX = 0200h
        BL = interrupt number
Return: CF clear
        CX:DX = segment:offset of real mode interrupt handler
Note:   the DPMI implementation is required to support all 256 vectors
SeeAlso: AX=0201h,AX=0204h,INT 21/AX=2503h
--------E-310201-----------------------------
INT 31 P - DPMI 0.9+ - SET REAL MODE INTERRUPT VECTOR
        AX = 0201h
        BL = interrupt number
        CX:DX = segment:offset of real mode handler
Return: CF clear
Note:   all memory that may be touched by a hardware interrupt handler must be
          locked down with INT 31/AX=0600h
SeeAlso: AX=0200h,AX=0205h,AX=0600h,INT 21/AX=2505h
--------E-310202-----------------------------
INT 31 P - DPMI 0.9+ - GET PROCESSOR EXCEPTION HANDLER VECTOR
        AX = 0202h
        BL = exception number (00h-1Fh)
Return: CF clear if successful
            CX:(E)DX = selector:offset of handler
        CF set on error
            AX = error code (DPMI 1.0+) (8021h) (see #03143)
Notes:  16-bit programs receive the pointer in CX:DX, 32-bit programs in CX:EDX
        DPMI 1.0+ supports this function only for backward compatibility; use
           AX=0210h or AX=0211h instead
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0203h,AX=0210h,AX=0211h,INT 2F/AX=FB42h/BX=0021h
--------E-310203-----------------------------
INT 31 P - DPMI 0.9+ - SET PROCESSOR EXCEPTION HANDLER VECTOR
        AX = 0203h
        BL = exception number (00h-1Fh)
        CX:(E)DX = selector:offset of handler
Return: CF clear if successful
        CF set on error
            AX = error code (DPMI 1.0+) (8021h,8022h) (see #03143)
Notes:  32-bit programs must supply an offset in EDX and use a 32-bit interrupt
          stack frame on chaining to the next exception handler
        the handler should return using a FAR return
        all fault stack frames contain an error code, but it is only valid for
          exceptions 08h and 0Ah-0Eh
        handlers will only be called if the exception occurs in protected mode,
          and the DPMI host does not transparently handle the exception
        the handler may change certain values on the stack frame
          (see #03146,#03147)
        DPMI 1.0+ supports this function only for backward compatibility; use
           AX=0212h or AX=0213h instead
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0202h,AX=0212h,AX=0213h,INT 2F/AX=FB42h/BX=0022h

Format of stack frame for 16-bit programs: (offset from SS:SP)
Offset  Size    Description     (Table 03146)
 00h    DWORD   return CS:IP (do not change)
 04h    WORD    error code
 06h    DWORD   CS:IP of exception
 0Ah    WORD    flags
 0Ch    DWORD   SS:SP

Format of stack frame for 32-bit programs: (offset from SS:ESP)
Offset  Size    Description     (Table 03147)
 00h    DWORD   return EIP (do not change)
 04h    WORD    return CS selector (do not change)
 06h    WORD    reserved (do not change)
 08h    DWORD   error code
 0Ch    DWORD   EIP of exception
 10h    WORD    CS selector of exception
 12h    WORD    reserved (do not change)
 14h    DWORD   EFLAGS
 18h    DWORD   ESP
 1Ch    WORD    SS
 1Eh    WORD    reserved (do not change)
--------E-310204-----------------------------
INT 31 P - DPMI 0.9+ - GET PROTECTED MODE INTERRUPT VECTOR
        AX = 0204h
        BL = interrupt number
Return: CF clear
        CX:(E)DX = selector:offset of handler
Notes:  16-bit programs use CX:DX, 32-bit programs use CX:EDX
        DPMI implementations are required to support all 256 vectors
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0200h,AX=0205h,INT 21/AX=2502h,INT 2C/AX=0006h
SeeAlso: INT 2F/AX=FB42h/BX=0024h
--------E-310205-----------------------------
INT 31 P - DPMI 0.9+ - SET PROTECTED MODE INTERRUPT VECTOR
        AX = 0205h
        BL = interrupt number
        CX:(E)DX = selector:offset of handler
Return: CF clear if successful
        CF set on error
            AX = error code (DPMI 1.0+) (8022h) (see #03143)
Notes:  16-bit programs use CX:DX, 32-bit programs use CX:EDX
        32-bit programs must use a 32-bit interrupt stack frame when chaining
          to the next handler
        DPMI implementations are required to support all 256 vectors
        hardware interrupts are reflected to the virtual machine's primary
          client, software interrupts to the current client
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0201h,AX=0204h,INT 21/AX=2504h,INT 2C/AX=0007h
SeeAlso: INT 2F/AX=FB42h/BX=0025h
--------E-310210-----------------------------
INT 31 P - DPMI 1.0+ - GET PROTECTED MODE EXTENDED PROCESSOR EXCEPTION HANDLER
        AX = 0210h
        BL = exception number (00h-1Fh)
Return: CF clear if successful
            CX:(E)DX = selector:offset of exception handler
        CF set on error
            AX = error code (8021h) (see #03143)
Note:   DPMI host reflects exception to current client's handler
SeeAlso: AX=0202h,AX=0211h,AX=0212h
--------E-310211-----------------------------
INT 31 P - DPMI 1.0+ - GET REAL MODE EXTENDED PROCESSOR EXCEPTION HANDLER
        AX = 0211h
        BL = exception number (00h-1Fh)
Return: CF clear if successful
            CX:(E)DX = selector:offset of exception handler
        CF set on error
            AX = error code (8021h) (see #03143)
Notes:  returns address of protected-mode handler for real-mode exception
        DPMI host performs a switch to protected mode, reflects the exception
          to the virtual machine's primary client, and returns to real mode
          on the handler's completion
SeeAlso: AX=0202h,AX=0210h,AX=0213h
--------E-310212-----------------------------
INT 31 P - DPMI 1.0+ - SET PROTECTED MODE EXTENDED PROCESSOR EXCEPTION HANDLER
        AX = 0212h
        BL = exception or fault number (00h-1Fh)
        CX:(E)DX = exception handler selector:offset
Return: CF clear if successful
        CF set on error
            AX = error code (8021h,8022h) (see #03143)
Note:   DPMI host sends exception to current client's handler
SeeAlso: AX=0203h,AX=0210h,AX=0213h
--------E-310213-----------------------------
INT 31 P - DPMI 1.0+ - SET REAL MODE EXTENDED PROCESSOR EXCEPTION HANDLER
        AX = 0213h
        BL = exception or fault number (00h-1Fh)
        CX:(E)DX = exception handler selector:offset
Return: CF clear if successful
        CF set on error
            AX = error code (8021h,8022h) (see #03143)
Notes:  specifies address of protected-mode handler for real-mode exception
        DPMI host performs a switch to protected mode, reflects the exception
          to the virtual machine's primary client, and returns to real mode
          on the handler's completion
SeeAlso: AX=0203h,AX=0211h,AX=0212h
--------E-310300-----------------------------
INT 31 P - DPMI 0.9+ - SIMULATE REAL MODE INTERRUPT
        AX = 0300h
        BL = interrupt number
        BH = flags
            bit 0: reset the interrupt controller and A20 line (DPMI 0.9)
                    reserved, must be 0 (DPMI 1.0+)
            others: reserved, must be 0
        CX = number of words to copy from protected mode to real mode stack
        ES:(E)DI = selector:offset of real mode call structure (see #03148)
Return: CF clear if successful
            real mode call structure modified (all fields except SS:SP, CS:IP
              filled with return values from real mode interrupt)
        CF set on error
            AX = error code (DPMI 1.0+) (8012h,8013h,8014h,8021h)(see #03143)
        protected mode stack unchanged
Notes:  16-bit programs use ES:DI as pointer, 32-bit programs use ES:EDI
        CS:IP in the real mode call structure is ignored for this call,
          instead, the indicated interrupt vector is used for the address
        the flags in the call structure are pushed on the real mode stack to
          form an interrupt stack frame, and the trace and interrupt flags are
          clear on entry to the handler
        DPMI will provide a small (30 words) real mode stack if SS:SP is zero
        the real mode handler must return with the stack in the same state as
          it was on being called
SeeAlso: AX=0302h,AX=FF01h,INT 21/AX=2511h,INT 21/AH=E3h"OS/286"
SeeAlso: INT 2C/AX=0026h,INT 2F/AX=FB42h/BX=000Dh

Format of DPMI real mode call structure:
Offset  Size    Description     (Table 03148)
 00h    DWORD   EDI
 04h    DWORD   ESI
 08h    DWORD   EBP
 0Ch    DWORD   reserved (00h)
 10h    DWORD   EBX
 14h    DWORD   EDX
 18h    DWORD   ECX
 1Ch    DWORD   EAX
 20h    WORD    flags
 22h    WORD    ES
 24h    WORD    DS
 26h    WORD    FS
 28h    WORD    GS
 2Ah    WORD    IP
 2Ch    WORD    CS
 2Eh    WORD    SP
 30h    WORD    SS
--------E-310301-----------------------------
INT 31 P - DPMI 0.9+ - CALL REAL MODE PROCEDURE WITH FAR RETURN FRAME
        AX = 0301h
        BH = flags
            bit 0: reset the interrupt controller and A20 line (DPMI 0.9)
                    reserved, must be 0 (DPMI 1.0+)
            others: reserved must be 0
        CX = number of words to copy from protected mode to real mode stack
        ES:(E)DI = selector:offset of real mode call structure
                  (see #03148 at INT 31/AX=0300h)
Return: CF clear if successful
            real mode call structure modified (all fields except SS:SP, CS:IP
              filled with return values from real mode interrupt)
        CF set on error
            AX = error code (DPMI 1.0+) (8012h,8013h,8014h,8021h)(see #03143)
        protected mode stack unchanged
Notes:  16-bit programs use ES:DI as pointer, 32-bit programs use ES:EDI
        the real mode procedure must exit with a FAR return
        DPMI will provide a small (30 words) real mode stack if SS:SP is zero
        the real mode handler must return with the stack in the same state as
          it was on being called
SeeAlso: AX=0300h,AX=0302h,AX=FF02h,INT 21/AX=250Eh,INT 21/AH=E1h"OS/286"
SeeAlso: INT 2C/AX=0025h
--------E-310302-----------------------------
INT 31 P - DPMI 0.9+ - CALL REAL MODE PROCEDURE WITH IRET FRAME
        AX = 0302h
        BH = flags
            bit 0: reset the interrupt controller and A20 line (DPMI 0.9)
                    reserved, must be 0 (DPMI 1.0+)
            others: reserved, must be 0
        CX = number of words to copy from protected mode to real mode stack
        ES:(E)DI = selector:offset of real mode call structure
                  (see #03148 at INT 31/AX=0300h)
Return: CF clear if successful
            real mode call structure modified (all fields except SS:SP, CS:IP
              filled with return values from real mode interrupt)
        CF set on error
            AX = error code (DPMI 1.0+) (8012h,8013h,8014h,8021h)(see #03143)
        protected mode stack unchanged
Notes:  16-bit programs use ES:DI as pointer, 32-bit programs use ES:EDI
        the flags in the call structure are pushed on the real mode stack to
          form an interrupt stack frame, and the trace and interrupt flags are
          clear on entry to the handler
        the real mode procedure must exit with an IRET
        DPMI will provide a small (30 words) real mode stack if SS:SP is zero
        the real mode handler must return with the stack in the same state as
          it was on being called
SeeAlso: AX=0300h
--------E-310303-----------------------------
INT 31 P - DPMI 0.9+ - ALLOCATE REAL MODE CALLBACK ADDRESS
        AX = 0303h
        DS:(E)SI = selector:offset of procedure to call
        ES:(E)DI = selector:offset of real mode call structure (see #03148)
Return: CF clear if successful
            CX:DX = segment:offset of real mode call address (see #03149)
        CF set on error
            AX = error code (DPMI 1.0+) (8015h) (see #03143)
Notes:  the real mode call structure is static, causing reentrancy problems;
          its contents are only valid at the time of a callback
        the called procedure must modify the real mode CS:IP before returning
        values are returned to real mode by modifying the real mode call struc
        DPMI hosts must provide at least 16 callbacks per client
        the limited DPMI host built into Phar Lap's 286|DOS-Extender v2.5 does
          not support this function
SeeAlso: AX=0304h,AX=0C00h

(Table 03149)
Values DPMI real-mode callback procedure is called with:
        DS:(E)SI = selector:offset of real mode SS:SP
        ES:(E)DI = selector:offset of real mode call structure
        SS:(E)SP = locked protected mode API stack
        interrupts disabled
Return: (with IRET)
        ES:(E)DI = selector:offset of real mode call structure to restore
--------E-310304-----------------------------
INT 31 P - DPMI 0.9+ - FREE REAL MODE CALLBACK ADDRESS
        AX = 0304h
        CX:DX = real mode callback address
Return: CF clear if successful
        CF set on error
            AX = error code (DPMI 1.0+) (8024h) (see #03143)
Note:   the limited DPMI host built into Phar Lap's 286|DOS-Extender v2.5 does
          not support this function
SeeAlso: AX=0303h
--------E-310305-----------------------------
INT 31 P - DPMI 0.9+ - GET STATE SAVE/RESTORE ADDRESSES
        AX = 0305h
Return: CF clear
        AX = size in bytes of state buffer
        BX:CX = real mode address of procedure to save/restore state
        SI:(E)DI = protected mode procedure to save/restore state (see #03150)
Notes:  the buffer size will be zero if it is not necessary to preserve state
        16-bit programs should call SI:DI, 32-bit programs should call SI:EDI
        this function is only needed if using the raw mode switch service
SeeAlso: AX=0306h

(Table 03150)
Call DPMI state-save procedures with:
        AL = direction
            00h save state
            01h restore state
        ES:(E)DI -> state buffer
Return: all registers preserved
--------E-310306-----------------------------
INT 31 P - DPMI 0.9+ - GET RAW MODE SWITCH ADDRESSES
        AX = 0306h
Return: CF clear
        BX:CX -> procedure to switch from real to protected mode (see #03151)
        SI:(E)DI -> procedure to switch from protected to real mode
Notes:  16-bit programs should jump to SI:DI, 32-bit programs should use SI:EDI
        the caller must save and restore the state of the task with AX=0305h
        not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0305h

(Table 03151)
Values to JUMP at mode-switch procedures with:
        AX = new DS
        CX = new ES
        DX = new SS
        (E)BX = new (E)SP
        SI:(E)DI = new CS:(E)IP
Notes:  BP/EBP is preserved across the call, but AX/EAX, BX/EBX, CX/ECX,
          DX/EDX, SI/ESI, and DI/EDI will be undefined; FS and GS will be 0000h
        interrupts will stay disabled during the entire mode switch if they
          are disabled on entry to the mode-switch procedure
--------E-310400-----------------------------
INT 31 P - DPMI 0.9+ - GET DPMI VERSION
        AX = 0400h
Return: CF clear
        AH = major version of DPMI spec supported
        AL = two-digit minor version of DPMI spec supported
        BX = DPMI host flags (see #03152)
        CL = processor type (02h=80286, 03h=80386, 04h=80486)
        DH = curr value of virtual master interrupt controller base interrupt
        DL = curr value of virtual slave interrupt controller base interrupt
BUG:    Windows NT versions from the March 1993 beta to at least the Final
          release with fixes to CSD002 report version 0090h (0.144); this has
          reportedly been corrected in the Windows NT 3.5 beta
SeeAlso: AX=0401h,INT 21/AX=250Ch,INT 2F/AX=1687h,INT 4B/AX=8102h/DX=0000h
SeeAlso: INT 67/AX=DE0Ah

Bitfields for DPMI host flags:
Bit(s)  Description     (Table 03152)
 0      running under an 80386 (32-bit) implementation
 1      processor returns to real mode for reflected interrupts instead of V86
          mode
 2      virtual memory supported
 3      reserved (undefined)
 4-15   reserved (zero)
--------E-310401-----------------------------
INT 31 P - DPMI 1.0+ - GET DPMI CAPABILITIES
        AX = 0401h
        ES:(E)DI -> 128-byte buffer for host description (see #03153)
Return: CF clear if successful
            AX = capabilities (see #03154)
            CX = reserved (00h)
            DX = reserved (00h)
            buffer filled
        CF set on error (DPMI 0.9 only)
SeeAlso: AX=0400h

Format of DPMI host description:
Offset  Size    Description     (Table 03153)
 00h    BYTE    host major version number
 01h    BYTE    host minor version number
 02h 126 BYTEs  ASCIZ host vendor name

Bitfields for DPMI capabilities:
Bit(s)  Description     (Table 03154)
 0      paged accessed/dirty supported (see AX=0506h,AX=0507h)
 1      exceptions restartability supported
 2      device mapping supported (see AX=0508h)
 3      conventional memory mapping supported (see AX=0509h)
 4      demand zero-fill supported
 5      write-protect client capability supported
 6      write-protect host capability supported
 7-15   reserved
--------E-310500-----------------------------
INT 31 P - DPMI 0.9+ - GET FREE MEMORY INFORMATION
        AX = 0500h
        ES:(E)DI -> buffer for memory information (see #03155)
Return: CF clear
Notes:  16-bit programs use ES:DI, 32-bit programs use ES:EDI
        this function must be considered advisory because other applications
          may affect the results at any time after the call
        fields not supported by the DPMI implementation are filled with
          FFFFFFFFh
        DPMI 1.0+ supports this function solely for backward compatibility; use
          AX=050Bh instead
        the limited DPMI host built into Phar Lap's 286|DOS-Extender v2.5 only
          returns the first field in the memory information record
SeeAlso: AX=0501h,AX=050Bh,AX=0604h

Format of DPMI memory information:
Offset  Size    Description     (Table 03155)
 00h    DWORD   largest available block in bytes
 04h    DWORD   maximum unlocked page allocation
 08h    DWORD   maximum locked page allocation
 0Ch    DWORD   total linear address space in pages
 10h    DWORD   total unlocked pages
 14h    DWORD   free pages
 18h    DWORD   total physical pages
 1Ch    DWORD   free linear address space in pages
 20h    DWORD   size of paging file/partition in pages
 24h 12 BYTEs   reserved
--------E-310501-----------------------------
INT 31 P - DPMI 0.9+ - ALLOCATE MEMORY BLOCK
        AX = 0501h
        BX:CX = size in bytes
Return: CF clear if successful
            BX:CX = linear address of block
            SI:DI = memory block handle for resizing and freeing block
        CF set on error
            AX = error code (DPMI 1.0+) (8012h-8014h,8016h,8021h)(see #03143)
Notes:  no selectors are allocated
        the memory block is allocated unlocked (can be locked with AX=0600h)
        allocations are often page granular (see AX=0604h)
        under MS Windows 3.10 Enhanced mode with paging enabled, it is possible
          for this function to fail even if AX=0500h indicates that enough
          memory is available
SeeAlso: AX=0000h,AX=0100h,AX=0500h,AX=0502h,AX=0503h,AX=0504h,AX=0D00h
SeeAlso: INT 2F/AX=FB42h/BX=0002h
--------E-310502-----------------------------
INT 31 P - DPMI 0.9+ - FREE MEMORY BLOCK
        AX = 0502h
        SI:DI = handle of memory block
Return: CF clear if successful
        CF set on error
            AX = error code (DPMI 1.0+) (8023h) (see #03143)
Note:   any selectors allocated for the memory block must also be freed,
          preferably before freeing the memory block
SeeAlso: AX=0001h,AX=0101h,AX=0501h,AX=0D01h
--------E-310503-----------------------------
INT 31 P - DPMI 0.9+ - RESIZE MEMORY BLOCK
        AX = 0503h
        BX:CX = new size in bytes (nonzero)
        SI:DI = handle of memory block
Return: CF clear if successful
            BX:CX = new linear address
            SI:DI = new handle of memory block
        CF set on error
            AX = error code (DPMI 1.0+) (8012h-8014h,8016h,8021h,8023h)
                (see #03143)
Notes:  any selectors pointing at the block must be updated
        the previous memory block handle becomes invalid
        an error is returned if the new size is 0
SeeAlso: AX=0102h,AX=0501h,AX=0505h
--------E-310504-----------------------------
INT 31 P - DPMI 1.0+ - ALLOCATE LINEAR MEMORY BLOCK
        AX = 0504h
        EBX = page-aligned linear address of memory block (00000000h if any
              address is acceptable)
        ECX = size in bytes (nonzero)
        EDX = flags
            bit 0: set to create committed pages instead of uncommitted pages
            bits 1-31 reserved (0)
Return: CF clear if successful
            EBX = linear address of memory block
            ESI = memory block handle
        CF set on error
            AX = error code (8001h,8012h-8014h,8016h,8021h,8025h)(see #03143)
Note:   only supported by 32-bit DPMI hosts, but may be used by 16-bit clients
SeeAlso: AX=0501h,AX=0505h
--------E-310505-----------------------------
INT 31 P - DPMI 1.0+ - RESIZE LINEAR MEMORY BLOCK
        AX = 0505h
        ESI = memory block handle
        ECX = new size in bytes (nonzero)
        EDX = flags
            bit 0: create committed pages rather than uncommitted pages
            bit 1: segment descriptor update required
                ES:EBX -> buffer containing array of WORDs with selectors
                EDI = number of selectors in array
            bits 2-31 reserved (0)
Return: CF clear if successful
            EBX = new linear base address
            ESI = new memory block handle
        CF set on error
            AX = error code (8001h,8012h-8014h,8016h,8021h,8023h)(see #03143)
Notes:  only supported by 32-bit DPMI hosts, but may be used by 16-bit clients
        the old memory block handle becomes invalid
        if EDX bit 1 set and the block's base address is changed, DPMI updates
          all descriptors for selectors in the update buffer which fall within
          the memory block
SeeAlso: AX=0503h,AX=0504h
--------E-310506-----------------------------
INT 31 P - DPMI 1.0+ - GET PAGE ATTRIBUTES
        AX = 0506h
        ESI = memory block handle
        EBX = offset in memory block of first page
        ECX = number of pages
        ES:EDX -> array of WORDs to hold page attributes (see #03156)
Return: CF clear if successful
            buffer filled
        CF set on error
            AX = error code (8001h,8023h,8025h) (see #03143)
Notes:  only supported by 32-bit DPMI hosts, but may be used by 16-bit clients
        if EBX is not page-aligned, it will be rounded down
SeeAlso: AX=0504h,AX=0507h,INT 21/AX=251Dh,INT 21/AX=EB00h

Bitfields for DPMI page attribute word:
Bit(s)  Description     (Table 03156)
 0-2    page type
        000 uncommitted
        001 committed
        010 mapped (see AX=0508h,AX=0509h)
        other currently unused
 3      page is read/write rather than read-only
 4      accessed/dirty bits supplied in bits 5 and 6
 5      page has been accessed (only valid if bit 4 set)
 6      page has been written (only valid if bit 4 set)
 7-15   reserved (0)
--------E-310507-----------------------------
INT 31 P - DPMI 1.0+ - MODIFY PAGE ATTRIBUTES
        AX = 0507h
        ESI = memory block handle
        EBX = offset in memory block of first page
        ECX = number of pages
        ES:EDX -> array of WORDs with new page attributes (see #03156)
Return: CF clear if successful
        CF set on error
            AX = error code (8001h,8002h,8013h,8014h,8021h,8023h,8025h)
                (see #03143)
            ECX = number of pages which have been set
Notes:  only supported by 32-bit DPMI hosts, but may be used by 16-bit clients
        if EBX is not page-aligned, it will be rounded down
SeeAlso: AX=0504h,AX=0506h,INT 21/AX=251Eh
--------E-310508-----------------------------
INT 31 P - DPMI 1.0+ - MAP DEVICE IN MEMORY BLOCK
        AX = 0508h
        ESI = memory block handle
        EBX = page-aligned offset within memory block of page(s) to be mapped
        ECX = number of pages to map
        EDX = page-aligned physical address of device
Return: CF clear if successful
        CF set on error
            AX = error code (8001h,8003h,8023h,8025h) (see #03143)
Notes:  only supported by 32-bit DPMI hosts, but may be used by 16-bit clients
        support of this function is optional; hosts are also allowed to support
          the function for some devices but not others
SeeAlso: AX=0504h,AX=0509h,AX=0800h,AX=0801h
--------E-310509-----------------------------
INT 31 P - DPMI 1.0+ - MAP CONVENTIONAL MEMORY IN MEMORY BLOCK
        AX = 0509h
        ESI = memory block handle
        EBX = page-aligned offset within memory block of page(s) to map
        ECX = number of pages to map
        EDX = page-aligned linear address of conventional (below 1M) memory
Return: CF clear if successful
        CF set on error
            AX = error code (8001h,8003h,8023h,8025h) (see #03143)
Notes:  only supported by 32-bit DPMI hosts, but may be used by 16-bit clients
        support of this function is optional
SeeAlso: AX=0504h,AX=0508h,AX=0801h
--------E-31050A-----------------------------
INT 31 P - DPMI 1.0+ - GET MEMORY BLOCK SIZE AND BASE
        AX = 050Ah
        SI:DI = memory block handle
Return: CF clear if successful
            SI:DI = size in bytes
            BX:CX = base address
        CF set on error
            AX = error code (8023h) (see #03143)
SeeAlso: AX=0501h,AX=0504h
--------E-31050B-----------------------------
INT 31 P - DPMI 1.0+ - GET MEMORY INFORMATION
        AX = 050Bh
        ES:(E)DI -> 128-byte buffer for memory information (see #03157)
Return: CF clear if successful
        CF set on error (DPMI 0.9 only)
Note:   16-bit programs use ES:DI, 32-bit programs must use ES:EDI
SeeAlso: AX=0500h

Format of DPMI memory information:
Offset  Size    Description     (Table 03157)
 00h    DWORD   total allocated bytes of physical memory controlled by host
 04h    DWORD   total allocated bytes of virtual memory controlled by host
 08h    DWORD   total available bytes of virtual memory controlled by host
 0Ch    DWORD   total allocated bytes of virtual memory for curr virtual mach
 10h    DWORD   total available bytes of virtual memory for curr virtual mach
 14h    DWORD   total allocated bytes of virtual memory for current client
 18h    DWORD   total available bytes of virtual memory for current client
 1Ch    DWORD   total locked bytes for current client
 20h    DWORD   maximum locked bytes for current client
 24h    DWORD   highest linear address available to current client
 28h    DWORD   largest available memory block in bytes
 2Ch    DWORD   minimum allocation unit in bytes
 30h    DWORD   allocation alignment unit size in bytes
 34h 76 BYTEs   reserved (00h)
--------E-310600-----------------------------
INT 31 P - DPMI 0.9+ - LOCK LINEAR REGION
        AX = 0600h
        BX:CX = starting linear address
        SI:DI = size of region in bytes
Return: CF clear if successful
        CF set on error
            none of the memory is locked
            AX = error code (DPMI 1.0+) (8013h,8017h,8025h) (see #03143)
Notes:  pages at beginning and end will be locked if the region overlaps them
        may be called multiple times for a given page; the DPMI host keeps a
          lock count for each page
SeeAlso: AX=0004h,AX=0601h,INT 21/AX=251Ah,INT 21/AX=EB06h
--------E-310601-----------------------------
INT 31 P - DPMI 0.9+ - UNLOCK LINEAR REGION
        AX = 0601h
        BX:CX = starting linear address
        SI:DI = size of region in bytes
Return: CF clear if successful
        CF set on error
            none of the memory is unlocked
            AX = error code (DPMI 1.0+) (8002h,8025h) (see #03143)
Notes:  pages at beginning and end will be unlocked if the region overlaps them
        memory whose lock count has not reached zero remains locked
SeeAlso: AX=0005h,AX=0600h,INT 21/AX=251Bh,INT 21/AX=EB07h
--------E-310602-----------------------------
INT 31 P - DPMI 0.9+ - MARK REAL MODE REGION AS PAGEABLE
        AX = 0602h
        BX:CX = starting linear address
        SI:DI = size of region in bytes
Return: CF clear if successful
        CF set on error
            none of the memory is made pageable
            AX = error code (DPMI 1.0+) (8002h,8025h) (see #03143)
Notes:  must relock all unlocked real mode memory before terminating process
          for DPMI 0.9; DPMI 1.0+ automatically relocks real mode memory
        pages at beginning and end will be unlocked if the region overlaps them
        pageability of real mode pages is binary, not a count
SeeAlso: AX=0600h,AX=0603h
--------E-310603-----------------------------
INT 31 P - DPMI 0.9+ - RELOCK REAL MODE REGION
        AX = 0603h
        BX:CX = starting linear address
        SI:DI = size of region in bytes
Return: CF clear if successful
        CF set on error
            none of the memory is relocked
            AX = error code (DPMI 1.0+) (8002h,8013h,8025h) (see #03143)
Notes:  pages at beginning and end will be relocked if the region overlaps them
        pageability of real mode pages is binary, not a count
SeeAlso: AX=0602h
--------E-310604-----------------------------
INT 31 P - DPMI 0.9+ - GET PAGE SIZE
        AX = 0604h
Return: CF clear if successful
            BX:CX = page size in bytes
        CF set on error
            AX = error code (DPMI 1.0+) (see also #03143)
                8001h unsupported, 16-bit host
BUG:    the Borland C++ 3.1 DPMILOAD returns with CF clear but BX and CX
          unchanged
--------E-310700-----------------------------
INT 31 Pu - DPMI 0.9+ - MARK PAGES AS PAGING CANDIDATES
        AX = 0700h
        BX:CX = starting linear page number
        SI:DI = number of pages to mark as paging candidates
Return: ???
Note:   although marked as reserved in versions 0.9 and 1.0 of the DPMI
          specification, this function is called by MS Windows TASKMAN,
          PROGMAN, and KERNEL
SeeAlso: AX=0701h,AX=0702h
--------E-310701-----------------------------
INT 31 Pu - DPMI 0.9+ - DISCARD PAGES
        AX = 0701h
        BX:CX = starting linear page number
        SI:DI = number of pages to discard
Return: ???
Note:   although marked as reserved in versions 0.9 and 1.0 of the DPMI
          specification, this function is called by MS Windows TASKMAN,
          PROGMAN, and KERNEL
SeeAlso: AX=0700h,AX=0703h
--------E-310702-----------------------------
INT 31 P - DPMI 0.9+ - MARK PAGE AS DEMAND PAGING CANDIDATE
        AX = 0702h
        BX:CX = starting linear address
        SI:DI = number of bytes to mark as paging candidates
Return: CF clear if successful
        CF set on error
            AX = error code (DPMI 1.0+) (8025h) (see #03143)
Notes:  this function is advisory, and does not force immediate paging
        partial pages will not be discarded
SeeAlso: AX=0700h,AX=0703h
--------E-310703-----------------------------
INT 31 P - DPMI 0.9+ - DISCARD PAGE CONTENTS
        AX = 0703h
        BX:CX = starting linear address
        SI:DI = number of bytes to mark as discarded
Return: CF clear if successful
        CF set on error
            AX = error code (DPMI 1.0+) (8025h) (see #03143)
Notes:  this function is advisory, and may be ignored by DPMI implementations
        partial pages will not be discarded
SeeAlso: AX=0701h,AX=0702h
--------E-310800-----------------------------
INT 31 P - DPMI 0.9+ - PHYSICAL ADDRESS MAPPING
        AX = 0800h
        BX:CX = physical address (should be above 1 MB)
        SI:DI = size in bytes
Return: CF clear if successful
            BX:CX = linear address which maps the requested physical memory
        CF set on error
            AX = error code (DPMI 1.0+) (8003h,8021h) (see #03143)
Notes:  implementations may refuse this call because it can circumvent protects
        the caller must build an appropriate selector for the memory
        do not use for memory mapped in the first megabyte
SeeAlso: AX=0002h,AX=0508h,AX=0509h,AX=0801h,INT 21/AX=250Ah,INT 21/AX=EB05h
--------E-310801-----------------------------
INT 31 P - DPMI 1.0+ - FREE PHYSICAL ADDRESS MAPPING
        AX = 0801h
        BX:CX = linear address returned by AX=0800h
Return: CF clear if successful
        CF set on error
            AX = error code (8025h) (see #03143)
Note:   should be called at end of access to device mapped with AX=0800h
SeeAlso: AX=0508h,AX=0509h,AX=0800h,INT 21/AX=EB03h
--------E-310900-----------------------------
INT 31 P - DPMI 0.9+ - GET AND DISABLE VIRTUAL INTERRUPT STATE
        AX = 0900h
Return: CF clear
        virtual interrupts disabled
        AL = previous interrupt state (00h disabled, 01h enabled)
        AH preserved
Notes:  the previous state may be restored simply by executing another INT 31
        a CLI instruction may be used if the previous state is unimportant,
          but should be assumed to be very slow due to trapping by the host
SeeAlso: AX=0901h,AX=0902h
--------E-310901-----------------------------
INT 31 P - DPMI 0.9+ - GET AND ENABLE VIRTUAL INTERRUPT STATE
        AX = 0901h
Return: CF clear
        virtual interrupts enabled
        AL = previous interrupt state (00h disabled, 01h enabled)
        AH preserved
Notes:  the previous state may be restored simply by executing another INT 31
        a STI instruction may be used if the previous state is unimportant,
          but should be assumed to be very slow due to trapping by the host
SeeAlso: AX=0900h,AX=0902h
--------E-310902-----------------------------
INT 31 P - DPMI 0.9+ - GET VIRTUAL INTERRUPT STATE
        AX = 0902h
Return: CF clear
        AL = current interrupt state (00h disabled, 01h enabled)
Note:   should be used rather than PUSHF because that instruction yields the
          physical interrupt state rather than the per-client virtualized
          interrupt flag
SeeAlso: AX=0900h,AX=0901h
--------E-310A00-----------------------------
INT 31 P - DPMI 0.9+ - GET VENDOR SPECIFIC API ENTRY POINT
        AX = 0A00h
        DS:(E)SI -> case-sensitive ASCIZ vendor name or identifier
Return: CF clear if successful
            ES:(E)DI -> FAR extended API entry point
            DS, FS, GS, EAX, EBX, ECX, EDX, ESI, EBP destroyed
        CF set on error
            AX = error code (DPMI 1.0+) (8001h) (see #03143)
Notes:  extended API parameters are vendor-specific
        DPMI 1.0+ supports this function solely for backward compatibility; use
          INT 2F/AX=168Ah instead
        this function is not supported by MS Windows 3.10, BC++ 3.1 DPMILOAD,
          or QDPMI v1.0x; use INT 2F/AX=168Ah instead.  It is supported by
          386MAX v7.01.
SeeAlso: INT 2F/AX=168Ah
--------E-310B00-----------------------------
INT 31 P - DPMI 0.9+ - SET DEBUG WATCHPOINT
        AX = 0B00h
        BX:CX = linear address
        DL = size (1,2,4 bytes)
        DH = type (00h execute, 01h write, 02h read/write)
Return: CF clear if successful
            BX = watchpoint handle
        CF set on error
            AX = error code (DPMI 1.0+) (8016h,8021h,8025h) (see #03143)
SeeAlso: AX=0212h,AX=0601h
--------E-310B01-----------------------------
INT 31 P - DPMI 0.9+ - CLEAR DEBUG WATCHPOINT
        AX = 0B01h
        BX = watchpoint handle
Return: CF clear if successful
        CF set on error
            AX = error code (DPMI 1.0+) (8023h) (see #03143)
Note:   the watchpoint handle is freed
SeeAlso: AX=0B00h
--------E-310B02-----------------------------
INT 31 P - DPMI 0.9+ - GET STATE OF DEBUG WATCHPOINT
        AX = 0B02h
        BX = watchpoint handle
Return: CF clear if successful
            AX = status flags
                bit 0: watch point has been executed since AX=0B00h or AX=0B03h
        CF set on error
            AX = error code (DPMI 1.0+) (8023h) (see #03143)
SeeAlso: AX=0B00h,AX=0B03h
--------E-310B03-----------------------------
INT 31 P - DPMI 0.9+ - RESET DEBUG WATCHPOINT
        AX = 0B03h
        BX = watchpoint handle
Return: CF clear if successful
        CF set on error
            AX = error code (DPMI 1.0+) (8023h) (see #03143)
SeeAlso: AX=0B02h
--------E-310C00-----------------------------
INT 31 P - DPMI 1.0+ - INSTALL RESIDENT HANDLER INIT CALLBACK
        AX = 0C00h
        ES:(E)DI -> resident service provider structure (see #03158)
Return: CF clear if successful
        CF set on error
            AX = error code (8015h,8021h,8025h) (see #03143 at AX=0000h)
Note:   calling this function declares an intent to provide resident
          protected mode services after terminating with AX=0C01h
SeeAlso: AX=0303h,AX=0C01h

Format of DPMI resident service provider structure:
Offset  Size    Description     (Table 03158)
 00h    QWORD   descriptor for 16-bit data segment
 08h    QWORD   descriptor for 16-bit code segment (zeros if not supported)
 10h    WORD    offset of 16-bit callback procedure
 12h  2 BYTEs   reserved
 14h    QWORD   descriptor for 32-bit data segment
 1Ch    QWORD   descriptor for 32-bit code segment (zeros if not supported)
 24h    DWORD   offset of 32-bit callback procedure
--------E-310C01-----------------------------
INT 31 P - DPMI 1.0+ - TERMINATE AND STAY RESIDENT
        AX = 0C01h
        BL = return code
        DX = number of paragraphs of DOS memory to reserve (0 or >= 6)
Return: never
Notes:  should only be used if the program will only provide services to
          other DPMI programs
        any protected mode memory remains allocated to the program unless
          explicitly freed before this call
        must first call AX=0C00h or program will simply be terminated
SeeAlso: AX=0C00h,INT 21/AH=31h
--------E-310D00-----------------------------
INT 31 P - DPMI 1.0+ - ALLOCATE SHARED MEMORY
        AX = 0D00h
        ES:(E)DI -> shared memory allocation request structure (see #03159)
Return: CF clear if successful
            request structure updated
        CF set on error
            AX = error code (8012h,8013h,8014h,8016h,8021h) (see #03143)
Note:   first 16 bytes of memory block will be initialized to zeros on the
          first allocation
SeeAlso: AX=0501h,AX=0D01h,AX=0D02h

Format of DPMI shared memory allocation request structure:
Offset  Size    Description     (Table 03159)
 00h    DWORD   requested length of shared memory block in bytes
 04h    DWORD   (ret) allocated length of block
 08h    DWORD   (ret) shared memory handle
 0Ch    DWORD   (ret) linear address of memory block
 10h    PWORD   selector:offset32 of ASCIZ name for memory block
                (name max 128 bytes)
 16h  2 BYTEs   reserved
 18h  4 BYTEs   reserved (00h)
--------E-310D01-----------------------------
INT 31 P - DPMI 1.0+ - FREE SHARED MEMORY
        AX = 0D01h
        SI:DI = shared memory block handle
Return: CF clear if successful
        CF set on error
            AX = error code (8023h) (see #03143)
Notes:  handle becomes invalid after this call
        DPMI maintains separate global and virtual machine use counts for each
          shared memory block; when the global use counts reaches zero, the
          block is finally destroyed
SeeAlso: AX=0502h,AX=0D00h
--------E-310D02-----------------------------
INT 31 P - DPMI 1.0+ - SERIALIZE SHARED MEMORY
        AX = 0D02h
        SI:DI = shared memory block handle
        DX = flags
            bit 0: return immediately rather than suspending if serialization
                  unavailable
            bit 1: shared rather than exclusive serialization
            bits 2-15 reserved (0)
Return: CF clear if successful
        CF set on error
            AX = error code (8004h,8005h,8017h-8019h,8023h) (see #03143)
Notes:  an exclusive serialization blocks any other serialization attempts for
          the same block by another virtual machine; a shared serialization
          blocks attempts at exclusive serialization by another virtual machine
        hosts are not required to detect deadlock
        a client's interrupt handler can cancel a serialization call which
          caused it to block by calling AX=0D03h
SeeAlso: AX=0D00h,AX=0D03h
--------E-310D03-----------------------------
INT 31 P - DPMI 1.0+ - FREE SERIALIZATION ON SHARED MEMORY
        AX = 0D03h
        SI:DI = shared memory block handle
        DX = flags
            bit 0: release shared serialization rather than exclusive serialztn
            bit 1: free pending serialization
            bits 2-15 reserved (0)
Return: CF clear if successful
        CF set on error
            AX = error code (8002h,8023h) (see #03143 at AX=0000h)
SeeAlso: AX=0D00h,AX=0D02h
--------E-310E00-----------------------------
INT 31 P - DPMI 1.0+ - GET COPROCESSOR STATUS
        AX = 0E00h
Return: CF clear
        AX = coprocessor status (see #03160)
Note:   supported by 386MAX v6.01, which otherwise only supports DPMI 0.9
SeeAlso: AX=0E01h

Bitfields for DPMI coprocessor status:
Bit(s)  Description     (Table 03160)
 0      numeric coprocessor enabled for current client
 1      client is emulating coprocessor
 2      numeric coprocessor is present
 3      host is emulating coprocessor instructions
 4-7    coprocessor type
        0000 none
        0010 80287
        0011 80387
        0100 80486 with numeric coprocessor
        other reserved
 8-15   not used
--------E-310E01-----------------------------
INT 31 P - DPMI 1.0+ - SET EMULATION
        AX = 0E01h
        BX = coprocessor flag bits (see #03161)
Return: CF clear if successful
        CF set on error
            AX = error code (8026h) (see #03143 at AX=0000h)
Note:   supported by 386MAX v6.01, which otherwise only supports DPMI 0.9
SeeAlso: AX=0E00h

Bitfields for DPMI coprocessor flags:
Bit(s)  Description     (Table 03161)
 0      enable numeric coprocessor for current client
 1      client will emulate coprocessor
 2-15   not used
--------E-3157-------------------------------
INT 31 - Netroom3 DPMI.EXE v3.00 - ???
        AH = 57h
        AL = subfunction (at least 02h,03h,04h,05h,07h,08h,09h,0Ah)
        ???
Return: ???
SeeAlso: INT 2C/AX=0000h"Cloaking"
--------E-315702-----------------------------
INT 31 - Netroom3 DPMI.EXE v3.00 - SWITCH TO PROTECTED MODE
        AX = 5702h
        DX = PSP segment of caller
        STACK: WORD     ???
               WORD     flags (bit 0 set if 32-bit program)
Return: as for DPMI mode-switch entry point (see #02718 at INT 2F/AX=1687h)
Note:   this function is called by the real-mode DPMI mode-switch entry point
SeeAlso: INT 2F/AX=1687h
--------E-31EE00------------------------
INT 31 - DOS32 v3.0+ - GET DOS32 VERSION AND SELECTOR VALUES
        AX = EE00h
Return: AL = minor version (BCD)
        AH = major version (BCD)
        DL = system type (1=raw DOS, 2=XMS, 4=VCPI, 8=DPMI)
        BX = selector of 4GB data segment with zero base address
Program: DOS32 is a 32 bit DOS extender by Adam Seychell.
SeeAlso: AX=EE02h
--------E-31EE02------------------------
INT 31 - DOS32 v3.0+ - GET DOS32 ADDRESS INFORMATION
        AX = EE02h
Return: AX = real-mode segment of temporary 8K buffer (v3.1+)
        EBX = 32bit linear address of the program segment
        EDX = Total size in bytes of the programs .EXE file after linking.
        ESI = offset address of PSP
        EDI = offset address of program environment
        ECX = offset address of the program's .EXE ASCIZ file name and path
SeeAlso: AX=EE00h,AX=EE20h
--------E-31EE10------------------------
INT 31 - DOS32 v3.2+ - SET UP A DOS32 LOADABLE LIBRARY
        AX = EE10h
        EDX -> library ASCIZ path\filename
        EBX = number of bytes to seek from beginning of file
Return: CF clear if successful
            EAX = size of memory block required to store library
            EBX = size of library file
        CF set on error
            AL = error code.
                01h error opening or reading file
                02h bad DOS32 library file
SeeAlso: AX=EE00h,AX=EE11h
--------E-31EE11------------------------
INT 31 - DOS32 v3.2+ - LOAD LIBRARY FILE
        AX = EE11h
        EDX -> near pointer of memory block to store library
Return: CF clear if successful
            EDX = near pointer to the dynamic library public
        CF set on error
Note:   must first successfuly call function AX=EE10h before calling this
          function
SeeAlso: AX=EE00h,AX=EE10h
--------E-31EE20------------------------
INT 31 - DOS32 v3.0+ - GET REAL MODE CALL BACK ADDRESS WITH RETF STACK FRAME
        AX = EE20h
        ESI = offset of the real mode call back function
Return: CF clear if successful
            CX:DX = real mode address to call up to the protected mode
                  procedure
        CF set on error
SeeAlso: AX=EE00h,AX=EE02h,AX=EE21h
--------E-31EE21------------------------
INT 31 - DOS32 v3.0+ - GET REAL MODE CALL BACK ADDRESS WITH IRET STACK FRAME
        AX = EE21h
        ESI = offset of the real mode call back function
Return: CF clear if successful
            CX:DX = real mode address to call up to the protected mode
                  procedure
        CF set on error
SeeAlso: AX=EE20h
--------E-31EE30------------------------
INT 31 - DOS32 v3.0+ - TERMINATE AND STAY RESIDENT
        AX = EE30h
SeeAlso: AX=EE21h,AX=EE40h,INT 21/AH=31h
--------E-31EE40------------------------
INT 31 - DOS32 v3.0+ - UNDO PREVIOUS MEMORY ALLOCATION or DMA BUFFER
        AX = EE40h
Return: CF clear if successful
        CF set on error
SeeAlso: AX=EE41h,AX=EE42h
--------E-31EE41------------------------
INT 31 - DOS32 v3.0+ - ALLOCATE 16KB DMA BLOCK
        AX = EE41h
Return: CF clear if successful
            EBX -> 16KB DMA block (physical address)
            EDX -> 16KB DMA block (offset address)
        CF set on error
SeeAlso: AX=EE40h,AX=EE42h
--------E-31EE42------------------------
INT 31 - DOS32 v3.0+ - ALLOCATE MEMORY BLOCK
        AX = EE42h
        EDX = size in bytes
Return: CF clear if successful
            EAX = size in bytes
            EDX -> memory block
        CF set on error
Note:   size is rounded off to the next 4KB boundary
SeeAlso: AX=EE40h,AX=EE41h
--------E-31FF00-----------------------------
INT 31 P - CauseWay - "Info" - GET SYSTEM SELECTORS/FLAGS
        AX = FF00h
Return: AX = selector for flag address space (base 00000000h, limit 4GB)
        BX = selector for current PSP segment (limit 0100h)
        (E)CX = size of DOS transfer buffer (max 64K)
        DX = real-mode segment address of DOS transfer buffer
        ES:(E)SI = protected-mode address of DOS transfer buffer
        EDI = system flags (see #03162)
Program: CauseWay is a 386 DOS extender by Michael Devore and John Wildsmith
          for use with Watcom C++ or assembly language programs
Notes:  the entire transfer buffer can be addressed with a 16-bit offset in
          protected mode
        CauseWay always maps selector 0040h to the BIOS data segment at
          real-mode segment 0040h; when not running under a DPMI host, CauseWay
          also provides selectors A000h, B000h, and B800h mapped to video
          memory
SeeAlso: AX=FF25h

Bitfields for CauseWay system flags:
Bit(s)  Description     (Table 03162)
 0      32-bit code
 1      virtual memory manage enabled
 3-2    mode: 00 raw extended memory, 01 VCPI, 10 DPMI
 4      DPMI available
 5      VCPI available
 6      no memory managers
 7      application descriptor table type: 0 = GDT, 1 = LDT
 14-8   reserved
 15     debugging engine present
--------E-31FF01-----------------------------
INT 31 P - CauseWay - "IntXX" - SIMULATE REAL-MODE INTERRUPT
        AX = FF01h
        BL = interrupt number
        ES:(E)DI -> real-mode register list (see #03148 at AX=0300h)
Return: register list updated
Note:   CauseWay fills in the values for SS, SP, and FLAGS itself, and ignores
          the values specified for CS and IP
SeeAlso: AX=0300h,AX=FF02h
--------E-31FF02-----------------------------
INT 31 P - CauseWay - "FarCallReal" - SIMULATE REAL-MODE FAR CALL
        AX = FF02h
        ES:(E)DI -> real-mode register list (see #03148 at AX=0300h)
Return: register list updated
SeeAlso: AX=0301h,AX=FF01h
--------E-31FF03-----------------------------
INT 31 P - CauseWay - "GetSel" - ALLOCATE NEW SELECTOR
        AX = FF03h
Return: CF clear if successful
            BX = new selector
        CF set on error
Note:   the new selector is initialized with a base address of 000000h, a limit
          of 0000h, and attributes read/write expand-up data
SeeAlso: AX=FF04h,AX=FF05h,AX=FF06h
--------E-31FF04-----------------------------
INT 31 P - CauseWay - "RelSel" - RELEASE A SELECTOR
        AX = FF04h
        BX = selector
Return: CF clear if successful
        CF set on error
SeeAlso: AX=FF03h,AX=FF06h
--------E-31FF05-----------------------------
INT 31 P - CauseWay - "CodeSel" - CONVERT SELECTOR TO EXECUTABLE CODE SELECTOR
        AX = FF05h
        BX = selector
        CL = default operation size (00h = 16-bit, 01h = 32-bit)
Return: CF clear if successful
        CF set on error
SeeAlso: AX=FF03h
--------E-31FF06-----------------------------
INT 31 P - CauseWay - "AliasSel" - CREATE READ/WRITE DATA ALIAS SELECTOR
        AX = FF06h
        BX = original selector
Return: CF clear if successful
            AX = new data selector aliasing original selector
        CF set on error
SeeAlso: AX=FF03h,AX=FF04h
--------E-31FF07-----------------------------
INT 31 P - CauseWay - "GetSelDet" - GET SELECTOR BASE AND LIMIT
        AX = FF07h
        BX = selector
Return: CF clear if successful
            CX:DX = base address
            SI:DI = limit (bytes)
        CF set on error
SeeAlso: AX=FF08h,AX=FF09h
--------E-31FF08-----------------------------
INT 31 P - CauseWay - "GetSelDet32" - GET SELECTOR BASE AND LIMIT (32-bit)
        AX = FF08h
Return: CF clear if successful
            EDX = base address
            ECX = limit (bytes)
        CF set on error
SeeAlso: AX=FF07h,AX=FF0Ah
--------E-31FF09-----------------------------
INT 31 P - CauseWay - "SetSelDet" - SET SELECTOR BASE AND LIMIT
        AX = FF09h
        BX = selector
        CX:DX = new base address
        SI:DI = new byte-granular limit
Return: CF clear if successful
        CF set on error
SeeAlso: AX=FF07h,AX=FF0Ah
--------E-31FF0A-----------------------------
INT 31 P - CauseWay - "SetSelDet32" - SET SELECTOR BASE AND LIMIT (32-bit)
        AX = FF0Ah
        BX = selector
        EDX = new base address
        ECX = new byte-granular limit
Return: CF clear if successful
        CF set on error
SeeAlso: AX=FF08h,AX=FF09h
--------E-31FF0B-----------------------------
INT 31 P - CauseWay - "GetMem" - ALLOCATE BLOCK OF MEMORY
        AX = FF0Bh
        CX:DX = size in bytes (FFFFh:FFFFh to get size of largest available)
Return: CF clear if successful
            BX = selector for accessing block if requested size not FFFFh:FFFFh
            CX:DX = size of largest available block if requested FFFFh:FFFFh
        CF set on error
SeeAlso: AX=FF0Ch,AX=FF0Dh,AX=FF0Fh,AX=FF10h,AX=FF2Ch
--------E-31FF0C-----------------------------
INT 31 P - CauseWay - "GetMem32" - ALLOCATE BLOCK OF MEMORY (32-bit)
        AX = FF0Ch
        ECX = size in bytes (FFFFFFFFh to get size of largest available block)
Return: CF clear if successful
            BX = selector for accessing block if requested size not FFFFh:FFFFh
            ECX = size of largest available block if requested FFFFh:FFFFh
        CF set on error
SeeAlso: AX=FF0Bh,AX=FF0Eh,AX=FF0Fh,AX=FF11h
--------E-31FF0D-----------------------------
INT 31 P - CauseWay - "ResMem" - RESIZE MEMORY BLOCK
        AX = FF0Dh
        BX = selector for block to be resized
        CX:DX = new size in bytes
Return: CF clear if successful
        CF set on error
Note:   the memory block may have to be copied to another location in order
          to satisfy the requested new size, in which case the base address
          of the selector is updated
SeeAlso: AX=FF0Bh,AX=FF0Eh,AX=FF12h
--------E-31FF0E-----------------------------
INT 31 P - CauseWay - "ResMem32" - RESIZE MEMORY BLOCK (32-bit)
        AX = FF0Eh
        BX = selector for block to be resized
        ECX = new size in bytes
Return: CF clear if successful
        CF set on error
Note:   the memory block may have to be copied to another location in order
          to satisfy the requested new size, in which case the base address
          of the selector is updated
SeeAlso: AX=FF0Ch,AX=FF0Dh,AX=FF13h
--------E-31FF0F-----------------------------
INT 31 P - CauseWay - "RelMem" - RELEASE PREVIOUSLY ALLOCATED MEMORY
        AX = FF0Fh
        BX = selector for block to be released
Return: CF clear if successful
        CF set on error
SeeAlso: AX=FF0Bh,AX=FF0Ch,AX=FF14h
--------E-31FF10-----------------------------
INT 31 P - CauseWay - "GetMemLinear" - ALLOCATE MEMORY WITHOUT SELECTOR
        AX = FF10h
        CX:DX = size of block in bytes
Return: CF clear if successful
            SI:DI = linear address of allocated block
        CF set on error
Note:   this function may return addresses above 16M
SeeAlso: AX=FF0Bh,AX=FF11h,AX=FF12h,AX=FF14h
--------E-31FF11-----------------------------
INT 31 P - CauseWay - "GetMemLinear32" - ALLOCATE MEMORY WITHOUT SELECTOR
        AX = FF11h
        ECX = size of block in bytes
Return: CF clear if successful
            ESI = linear address of allocated block
        CF set on error
Note:   this function may return addresses above 16M
SeeAlso: AX=FF0Ch,AX=FF10h,AX=FF13h,AX=FF14h
--------E-31FF12-----------------------------
INT 31 P - CauseWay - "ResMemLinear" - RESIZE LINEAR MEMORY BLOCK
        AX = FF12h
        CX:DX = new size in bytes
        SI:DI = linear address of block to be resized
Return: CF clear if successful
           SI:DI = new linear address of block
        CF set on error
SeeAlso: AX=FF0Dh,AX=FF10h,AX=FF13h
--------E-31FF13-----------------------------
INT 31 P - CauseWay - "ResMemLinear32" - RESIZE LINEAR MEMORY BLOCK (32-bit)
        AX = FF13h
        ECX = new size in bytes
        ESI = linear address of block to be resized
Return: CF clear if successful
           ESI = new linear address of block
        CF set on error
SeeAlso: AX=FF0Eh,AX=FF11h,AX=FF12h
--------E-31FF14-----------------------------
INT 31 P - CauseWay - "RelMemLinear" - RELEASE LINEAR MEMORY BLOCK
        AX = FF14h
        SI:DI = linear address of block to be released
Return: CF clear if successful
        CF set on error
SeeAlso: AX=FF0Fh,AX=FF10h,AX=FF15h
--------E-31FF15-----------------------------
INT 31 P - CauseWay - "RelMemLinear32" - RELEASE LINEAR MEMORY BLOCK (32-bit)
        AX = FF15h
        ESI = linear address of block to be released
Return: CF clear if successful
        CF set on error
SeeAlso: AX=FF0Fh,AX=FF11h,AX=FF15h
--------E-31FF16-----------------------------
INT 31 P - CauseWay - "GetMemNear" - ALLOCATE APPLICATION-RELATIVE MEMORY
        AX = FF16h
        EBX = size in bytes of block to allocate
Return: CF clear if successful
           ESI = application-relative linear address of allocated block
        CF set on error
SeeAlso: AX=FF17h,AX=FF18h,AX=FF19h
--------E-31FF17-----------------------------
INT 31 P - CauseWay - "ResMemNear" - RESIZE APPLICATION-RELATIVE MEMORY BLOCK
        AX = FF17h
        EBX = size in bytes of block to allocate
        ESI = application-relative linear address of block
Return: CF clear if successful
            ESI = new application-relative linear address of block
        CF set on error
SeeAlso: AX=FF16h,AX=FF18h,AX=FF19h
--------E-31FF18-----------------------------
INT 31 P - CauseWay - "RelMemNear" - RELEASE APPLICATION-RELATIVE MEMORY BLOCK
        AX = FF18h
        ESI = application-relative linear address of block
Return: CF clear if successful
        CF set on error
SeeAlso: AX=FF16h,AX=FF17h,AX=FF19h
--------E-31FF19-----------------------------
INT 31 P - CauseWay - "Linear2Near" - CONVERT LINEAR TO APP-RELATIVE ADDRESS
        AX = FF19h
        ESI = linear address
Return: ESI = application-relative linear address
SeeAlso: AX=FF1Ah
--------E-31FF1A-----------------------------
INT 31 P - CauseWay - "Near2Linear" - CONVERT APP-RELATIVE TO LINEAR ADDRESS
        AX = FF1Ah
        ESI = application-relative linear address
Return: ESI = linear address
SeeAlso: AX=FF19h
--------E-31FF1B-----------------------------
INT 31 P - CauseWay - "LockMem" - LOCK REGION OF MEMORY
        AX = FF1Bh
        BX:CX = starting linear address
        SI:DI = size of region in bytes
Return: CF clear if successful
        CF set on error
Desc:   prevent memory from being swapped out by the virtual memory manager
Note:   locks are applied on 4K page boundaries, so memory above and below
          the specified region may be locked as well
SeeAlso: AX=FF1Ch,AX=FF1Dh
--------E-31FF1C-----------------------------
INT 31 P - CauseWay - "LockMem32" - LOCK REGION OF MEMORY (32-bit)
        AX = FF1Ch
        ESI = starting linear address
        ECX = size of region in bytes
Return: CF clear if successful
        CF set on error
Desc:   prevent memory from being swapped out by the virtual memory manager
Note:   locks are applied on 4K page boundaries, so memory above and below
          the specified region may be locked as well
SeeAlso: AX=FF1Bh,AX=FF1Eh,AX=FF1Fh
--------E-31FF1D-----------------------------
INT 31 P - CauseWay - "UnLockMem" - UNLOCK REGION OF MEMORY
        AX = FF1Dh
        BX:CX = starting linear address
        SI:DI = size of region in bytes
Return: CF clear if successful
        CF set on error
Desc:   allow memory to be swapped out by the virtual memory manager
Note:   locks are applied on 4K page boundaries, so memory above and below
          the specified region may be unlocked as well
SeeAlso: AX=FF1Bh,AX=FF1Eh
--------E-31FF1E-----------------------------
INT 31 P - CauseWay - "UnLockMem32" - UNLOCK REGION OF MEMORY (32-bit)
        AX = FF1Eh
        ESI = starting linear address
        ECX = size of region in bytes
Return: CF clear if successful
        CF set on error
Desc:   allow memory to be swapped out by the virtual memory manager
Note:   locks are applied on 4K page boundaries, so memory above and below
          the specified region may be unlocked as well
SeeAlso: AX=FF1Ch,AX=FF1Dh,AX=FF20h
--------E-31FF1F-----------------------------
INT 31 P - CauseWay - "LockMemNear" - LOCK APPLICATION-RELATIVE MEMORY REGION
        AX = FF1Fh
        ESI = starting application-relative linear address
        EBX = size of region in bytes
Return: CF clear if successful
        CF set on error
Desc:   prevent memory from being swapped out by the virtual memory manager
Note:   locks are applied on 4K page boundaries, so memory above and below
          the specified region may be locked as well
SeeAlso: AX=FF1Ch,AX=FF20h
--------E-31FF20-----------------------------
INT 31 P - CauseWay - "UnLockMemNear" - UNLOCK APP-RELATIVE MEMORY REGION
        AX = FF20h
        ESI = starting application-relative linear address
        ECX = size of region in bytes
Return: CF clear if successful
        CF set on error
Desc:   allow memory to be swapped out by the virtual memory manager
Note:   locks are applied on 4K page boundaries, so memory above and below
          the specified region may be unlocked as well
SeeAlso: AX=FF1Eh,AX=FF1Fh
--------E-31FF21-----------------------------
INT 31 P - CauseWay - "GetMemDOS" - ALLOCATE CONVENTIONAL MEMORY
        AX = FF21h
        BX = number of paragraphs to allocate
Return: CF clear if successful
            AX = real-mode segment of allocated block
            DX = initial selector for block
        CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
            BX = size of largest available block
Note:   if the requested size is greater than 64K, contiguous selectors will
          be allocated, one for each 64K; for 32-bit applications, the first
          selector's limit will be set to the size of the entire block, while
          that selector will have a limit of 64K for 16-bit applications.  All
          selectors after the first one have a limit of 64K except the final
          one
SeeAlso: AX=FF22h,AX=FF23h,INT 21/AH=48h
--------E-31FF22-----------------------------
INT 31 P - CauseWay - "ResMemDOS" - RESIZE CONVENTIONAL MEMORY BLOCK
        AX = FF22h
        BX = new size in paragraphs
        DX = initial selector for block
Return: CF clear if successful
        CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
            BX = maximum number of paragraphs available
Note:   this function will also fail if the block is expanded past a 64K
          boundary and the next selector is already in use
SeeAlso: AX=FF21h,AX=FF23h,INT 21/AH=49h
--------E-31FF23-----------------------------
INT 31 P - CauseWay - "RelMemDOS" - RELEASE CONVENTIONAL MEMORY BLOCK
        AX = FF23h
        DX = initial selector for block
Return: CF clear if successful
        CF set on error
            AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
Note:   all descriptors allocated for the block are freed
SeeAlso: AX=FF21h,AX=FF22h,INT 21/AH=4Ah
--------E-31FF24-----------------------------
INT 31 P - CauseWay - "ExecOverlay" - LOAD AND OPTIONALLY EXECUTE APP CODE
        AX = FF24h
        EBX = flags
            bit 0: don't execute (overlay only)
            bit 1: don't preserve relocation information
        ES:EDX -> filename (see also #03163)
        FS:ESI -> commandline (ESI = 00000000h if no commandline)
        GS:EDI -> name (CW's /o option)
Return: CF clear if successful
            ---EBX bit 0 set---
            CX:EDX = program entry point (CS:EIP)
            SI = segment of PSP
            ---EBX bit 1 set---
            BX:EAX = initial SS:ESP
            EDI high word = base segment
            EDI low word = number of segments
            EBP = start of segment definitions
        CF set on error
            AX = error code
                0001h DOS file access error
                0002h not a CuaseWay 3P file
                0003h not enough memory
SeeAlso: AX=FF2Ah,INT 21/AH=4Bh

Format of CauseWay executable:
Offset  Size    Description     (Table 03163)
 00h  2 BYTEs   signature "3P"
 02h    DWORD   size of header data in bytes
 06h    DWORD   size of EXE image data in bytes
 0Ah    DWORD   number of bytes of program memory required
 0Eh    WORD    number of segment definitions (see #03165)
 10h    DWORD   number of relocation table entries
 14h    DWORD   offset of program entry point
 18h    WORD    segment list entry number for entry point's CS
 1Ah    DWORD   initial ESP
 1Eh    WORD    segment list entry number for initial SS
 20h    DWORD   control flags (see #03164)
 24h    DWORD   automatic stack size in bytes if ESP entry = 00000000h
 28h    BYTE    length of name (name follows program image)
 29h 23 BYTEs   reserved
SeeAlso: #01594,#01609 at INT 21/AH=4Bh

Bitfields for CauseWay executable control flags:
Bit(s)  Description     (Table 03164)
 0      16-bit interrupt stack frame
 7      descriptor table type (0 = GDT, 1 = LDT)
 14     16-bit default data size
 31     compressed EXE image
Note:   bits 0 and 14 should always be equal
SeeAlso: #03163

Format of CauseWay segment definition [array]:
Offset  Size    Description     (Table 03165)
 00h    DWORD   start offset within program image
 04h    DWORD   length and type
                bits 0-19: length
                bit 20:    granularity (if set, length is in 4K pages)
                bits 21-24: type
                        0000 code
                        0001 read/write data
                        0010 stack
                        0011 read-only data
                bit 25: force segment descriptor's D bit to 0
                bit 26: force segmetn descriptor's D bit to 1
SeeAlso: #03163
--------E-31FF25-----------------------------
INT 31 P - CauseWay - "GetDOSTrans" - GET DOS TRANSFER BUFFER
        AX = FF25h
Return: BX = real-mode segment of transfer buffer
        ECX = transfer buffer size
        DX = protected-mode selector for transfer buffer
Note:   the default buffer size of 8K is sufficient for most applications,
          but an application performing large amounts of file I/O may benefit
          from allocating its own, larger buffer
SeeAlso: AX=FF00h,AX=FF26h
--------E-31FF26-----------------------------
INT 31 P - CauseWay - "SetDOSTrans" - SET DOS TRANSFER BUFFER
        AX = FF26h
        BX = real-mode segment of new transfer buffer
        ECX = new transfer buffer size
        DX = protected-mode selector for new transfer buffer
Return: nothing
Note:   the specific buffer must be located in conventional memory; only the
          first 64K will be used
SeeAlso: AX=FF25h
--------E-31FF27-----------------------------
INT 31 P - CauseWay v1.3 - "GetMCBSize" - GET CURRENT MCB ALLOCATION BLOCK SIZE
        AX = FF27h
Return: ECX = current threshold
Desc:   determine the memory allocation size below which CauseWay will use
          internal MCB chains rather than allocating full 4K pages via DPMI
SeeAlso: AX=FF00h,AX=FF28h
--------E-31FF28-----------------------------
INT 31 P - CauseWay v1.3 - "SetMCBSize" - SET MCB MEMORY ALLOCATION BLOCK SIZE
        AX = FF28h
        ECX = new threshold (0000000h to disable MCB memory allocation system)
Return: CF clear if successful
            threshold unchanged (default 16K)
        CF set on error (threshold > 64K)
Desc:   specify the memory allocation size below which CauseWay will use
          internal MCB chains rather than allocating full 4K pages via DPMI
Note:   the specified threshold will be rounded up to the next higher multiple
          of 4K
SeeAlso: AX=FF00h,AX=FF27h
--------E-31FF29-----------------------------
INT 31 P - CauseWay v1.3 - "GetSels" - ALLOCATE MULTIPLE SELECTORS
        AX = FF29h
        CX = number of selectors to allocate
Return: BX = base selector
Desc:   allocate multiple contiguous selectors, initializing each to have a
          base address and limit of zero
SeeAlso: AX=FF00h,AX=FF04h
--------E-31FF2A-----------------------------
INT 31 P - CauseWay v1.3 - "cwLoad" - LOAD ANOTHER CAUSEWAY PROGRAM AS OVERLAY
        AX = FF2Ah
        DS:EDX -> filename
Return: CF clear if successful
            CX:EDX = CS:EIP of entry point
            BX:EAX = initial SS:ESP for program
            SI = PSP for overlay program
        CF set on error
            AX = error code (01h file error, 02h not a 3P file, 03h no memory)
Note:   the returned PSP can be given to "RelMem" (AX=FF0Fh) to release the
          overlay's memory and selectors; only selectors and memory allocated
          during loading will be freed by RelMem unless one switches PSPs with
          INT 21/AH=50h
SeeAlso: AX=FF00h,AX=FF24h
--------E-31FF2B-----------------------------
INT 31 P - CauseWay v1.3 - "cwcInfo" - VALIDATE AND GET SIZE OF CWC FILE
        AX = FF2Bh
        BX = file handle for CWC-compressed file
Return: CF clear if successful
            ECX = expanded file size
        CF set on error (not a CWC-compressed file)
SeeAlso: AX=FF00h,AX=FFFBh
--------E-31FF2C-----------------------------
INT 31 P - CauseWay v1.3 - "GetMemSO" - ALLOCATE MEMORY AND RETURN SEL:OFFSET
        AX = FF2Ch
        CX:DX = block size in bytes
Return: CF clear if successful
           SI:DI = selector:offset of allocated memory
        CF set on error
Note:   unlike "GetMem" (AX=FF0Bh), this function will reuse selectors until a
          segment is full, rather than allocating a new selector for each
          memory block
SeeAlso: AX=FF00h,AX=FF2Dh,AX=FF2Eh
--------E-31FF2D-----------------------------
INT 31 P - CauseWay v1.3 - "ResMemSO" - RESIZE SELECTOR:OFFSET MEMORY BLOCK
        AX = FF2Dh
        SI:DI = selector:offset for memory block
        CX:DX = new size of block
Return: CF clear if successful
           SI:DI = new selector:offset for memory block
        CF set on error
SeeAlso: AX=FF00h,AX=FF2Ch,AX=FF2Eh
--------E-31FF2E-----------------------------
INT 31 P - CauseWay v1.3 - "RelMemSO" - RELEASE SELECTOR:OFFSET MEMORY BLOCK
        AX = FF2Eh
        SI:DI = selector:offset for memory block
SeeAlso: AX=FF00h
--------E-31FFFB-----------------------------
INT 31 P - Causeway v1.3 - "cwcLoad" - LOAD/EXPAND CWC-COMPRESSED FILE
        AX = FFFBh
        BX = source file handle
        ES:EDI -> memory buffer into which to expand file
Return: CF clear if successful
            ECX = expanded data length
        CF set on error
            EAX = error code (01h file error, 02h bad data, 03h not CWC file)
Note:   the provided file may consist of the concatenation of several CWC
          files; the one beginning at the current file position will be
          expanded
SeeAlso: AX=FF2Bh
--------v-32---------------------------------
INT 32 - VIRUS - "Tiny" Viruses - ORIGINAL INT 21h VECTOR
SeeAlso: INT 21/AX=FFFFh"VIRUS",INT 31"VIRUS",INT 44"VIRUS"
--------v-32---------------------------------
INT 32 - VIRUS - "Plovdiv 1.3"/"Damage 1.3" - ORIGINAL INT 21h VECTOR
SeeAlso: INT 31"VIRUS",INT 9E"VIRUS"
--------y-326E-------------------------------
INT 32 - NOISE.SYS 0.53 - API
        AH = 6Eh (function ID)
        AL = subfunction (see INT 32/AX=6E00h)
Return: CF set on error
            AL = error code (see #03166)
        CF clear if successful
Notes:  INT 32 is only a proposed interface for NOISE.SYS. Use the IOCTL READ
          from the RANDOM device to determine the interrupt and function ID
          used by the driver, since future versions may use the Alternate
          Multiplex Interrupt (AMIS) at INT 2Dh.
        the beta v0.51 had a substantially different API on INT 32/AH=6Eh

(Table 03166)
Values for NOISE.SYS error codes:
 00h    subfunction not supported
 FBh    random pool is empty
 FCh    quality of sample is too low
 FDh    too many processes using the API or driver
 FEh    subfunction is disabled in the current build
 FFh    successful
--------y-326E00-----------------------------
INT 32 - NOISE.SYS v0.53+ - INSTALLATION CHECK
        AX = 6E00h
Return: AL = installation status
            00h not installed
            FFh installed
                CX = version (ie, 0123h = Version 1.2.3)
                DX:DI -> signature string
--------y-326E01-----------------------------
INT 32 - NOISE.SYS v0.53+ - GET ENTRY POINT
        AX = 6E01h
Return: AL = FFh
        DX:DI -> far call hook
----------326E04-----------------------------
INT 32 - NOISE.SYS v0.55+ - GET INTERRUPT HOOK LIST
        AX = 6E04h
Return: AL = status
            00h = unimplemented
            04h = DX:BX -> interrupt hook list
            FEh = subfunction disabled
Note:   the hook list array ends with API interrupt (usually 32h, although
          it will differ if the API is installed at another interrupt)
----------326E06-----------------------------
INT 32 - NOISE.SYS v0.55+ - GET DEVICE DRIVER HEADER
        AX = 6E06h
Return: AL = number of device drivers in NOISE.SYS chain
            02h = default (for RANDOM and URANDOM devices)
        AH = AMIS device driver flags (set to 00h for now)
        DX:BX -> first device in chain (see #01646)
SeeAlso: INT 2D/AL=06h
--------y-326E10-----------------------------
INT 32 - NOISE.SYS v0.53+ - STATUS CHECK
        AX = 6E10h
Return: CF set on error
            AL = error code (FDh) (see #03166)
        CF clear if successful
            AL = status
                FFh successful
            BH = number of processes using the API
            CX = number of random bytes waiting
            DX = maximum possible bytes waiting
                (if CX=DX, the pool is full)
Note:   this subfunction is a convenient way to check the driver if any
          fresh bytes are waiting in the output pool.
SeeAlso: INT 32/AH=6Eh,AX=6E00h,AX=6E11h
--------y-326E11-----------------------------
INT 32 - NOISE.SYS v0.53+ - GET ENTROPY ESTIMATE
        AX = 6E11h
Return: CF set on error
            AL = error code (00h,FDh,FEh) (see #03166)
        CF clear if successful
            EBX = estimated bit count (refer to note below)
            CL = FRACBITS (number of fractional bits)
            EDX = low 32-bits of total number of samples added
Note:  the estimated number of fresh random bits is equal to
          (EAX >> FRACBITS) + ((EAX & ((1 << FRACBITS)-1) / (1 << FRACBITS))
SeeAlso: AH=6Eh,AX=6E00h
--------y-326E12-----------------------------
INT 32 - NOISE.SYS v0.53+ - ADD SAMPLE FROM FAST TIMER
        AX = 6E12h
Return: CF set on error
            AL = error code (FCh,FDh,FEh) (see #03166)
        CF clear if successful
            CX = number of random bytes waiting
Note:   subfunctions 12h and 13h are meant for applications or devices
          which are able to gather entropy from other sources which are
          not polled by NOISE.SYS (for example, a communications driver
          could use this call to sample packet arrival times).
SeeAlso: AX=6E00h,AX=6E10h,AX=6E13h
--------y-326E13-----------------------------
INT 32 - NOISE.SYS v0.53+ - ADD 16-BIT SAMPLE TO RANDOM POOL
        AX = 6E13h
        DX = sample
Return: CF set on error
            AL = error code (FCh,FEh) (see #03166)
        CF clear if successful
            CX = number of random bytes waiting
SeeAlso: AX=6E00h,AX=6E11h
--------y-326E14-----------------------------
INT 32 - NOISE.SYS v0.53+ - GET FLAGS
        AX = 6E14h
Return: BX = flags (see #03167)
        CX = mask of settable flags in BX
SeeAlso: AX=6E00h,AX=6E15h

Bitfields for NOISE.SYS flags:
Bit(s)  Description     (Table 03167)
 0      MS Windows active
 1-5    reserved
 6      clock drift sampling
 7      video retrace drift sampling
 8      network access sampling (not implemented yet in 0.53)
 9      CD-ROM access sampling (not implemented yet in 0.53)
 10     DOS spinner
 11     DOS process start/end and miscellaneous process activity sampling
 12     mouse movement/button sampling
 13     disk sampling (INT 13)
 14     keystroke timings
 15     reserved for hardware RNG
--------y-326E15-----------------------------
INT 32 - NOISE.SYS v0.53+ - SET FLAGS
        AX = 6E15h
        BX = flags (see #03167)
Return: BX = new flags
Note:   flags which AX=6E14h indicates are not settable should be masked off
          by ANDing with the CX returned by AX=6E14h
SeeAlso: AX=6E00h,AX=6E14h
--------y-326E16-----------------------------
INT 32 - NOISE.SYS v0.53+ - READ URANDOM BYTES
        AX = 6E16h
        CX = number of bytes
        ES:DI -> buffer
Return: CF set on error
            AL = error code (FDh,FEh) (see #03166)
        CF clear if successful
            CX = number of random bytes read
SeeAlso: AX=6E00h,AX=6E12h,AX=6E17h
--------y-326E17-----------------------------
INT 32 - NOISE.SYS v0.53+ - READ RANDOM BYTES
        AX = 6E17h
        CX = number of bytes
        ES:DI -> buffer
Return: CF set on error
            AL = error code (FBh,FDh,FEh) (see #03166)
        CF clear if successful
            CX = number of random bytes read
SeeAlso: AX=6E00h,AX=6E16h
----------326E18-----------------------------
INT 32 - NOISE.SYS v0.6+ - READ CONTROL RECORD
        AX = 6E18h
        CX = buffer size
        ES:DI -> buffer
Return: AL = status
            00h unimplemented (before v0.6)
            FEh subfunction is disabled
            FFh successful
                CX = number of bytes read
Note:   the control record corresponds to the IOCTL Read record for the RANDOM
          device
----------326E-------------------------------
INT 32 - NOISE.SYS - RESERVED FOR FUTURE USE
        AH = 6Eh
        AL = 19h to 3Fh
Return: AL = 00h
Note:   these functions are reserved for future use; user additions to the
          the driver should use subfunctions 40h to FFh.
--------M-330000-----------------------------
INT 33 - MS MOUSE - RESET DRIVER AND READ STATUS
        AX = 0000h
Return: AX = status
            0000h hardware/driver not installed
            FFFFh hardware/driver installed
        BX = number of buttons
            0000h other than two
            0002h two buttons (many drivers)
            0003h Mouse Systems/Logitech three-button mouse
            FFFFh two buttons
Notes:  to use mouse on a Hercules-compatible monographics card in graphics
          mode, you must first set 0040h:0049h to 6 for page 0 or 5 for page 1,
          and then call this function.  Logitech drivers v5.01 and v6.00
          reportedly do not correctly use Hercules graphics in dual-monitor
          systems, while version 4.10 does.
        the Logitech mouse driver contains the signature string "LOGITECH"
          three bytes past the interrupt handler; many of the Logitech mouse
          utilities check for this signature.
        Logitech MouseWare v6.30 reportedly does not support CGA video modes
          if no CGA is present when it is started and the video board is
          later switched into CGA emulation
SeeAlso: AX=0011h,AX=0021h,AX=002Fh,INT 62/AX=007Ah,INT 74
--------M-330001-----------------------------
INT 33 - MS MOUSE v1.0+ - SHOW MOUSE CURSOR
        AX = 0001h
SeeAlso: AX=0002h,INT 16/AX=FFFEh,INT 62/AX=007Bh,INT 6F/AH=06h"F_TRACK_ON"
--------M-330002-----------------------------
INT 33 - MS MOUSE v1.0+ - HIDE MOUSE CURSOR
        AX = 0002h
Note:   multiple calls to hide the cursor will require multiple calls to
          function 01h to unhide it.
SeeAlso: AX=0001h,AX=0010h,INT 16/AX=FFFFh,INT 62/AX=007Bh
SeeAlso: INT 6F/AH=08h"F_TRACK_OFF"
--------M-330003-----------------------------
INT 33 - MS MOUSE v1.0+ - RETURN POSITION AND BUTTON STATUS
        AX = 0003h
Return: BX = button status (see #03168)
        CX = column
        DX = row
Note:   in text modes, all coordinates are specified as multiples of the cell
          size, typically 8x8 pixels
SeeAlso: AX=0004h,AX=000Bh,INT 2F/AX=D000h"ZWmous"

Bitfields for mouse button status:
Bit(s)  Description     (Table 03168)
 0      left button pressed if 1
 1      right button pressed if 1
 2      middle button pressed if 1 (Mouse Systems/Logitech/Genius)
--------M-330004-----------------------------
INT 33 - MS MOUSE v1.0+ - POSITION MOUSE CURSOR
        AX = 0004h
        CX = column
        DX = row
Note:   the row and column are truncated to the next lower multiple of the cell
          size (typically 8x8 in text modes); however, some versions of the
          Microsoft documentation incorrectly state that the coordinates are
          rounded
SeeAlso: AX=0003h,INT 62/AX=0081h,INT 6F/AH=10h"F_PUT_SPRITE"
--------M-330005-----------------------------
INT 33 - MS MOUSE v1.0+ - RETURN BUTTON PRESS DATA
        AX = 0005h
        BX = button number (see #03169)
Return: AX = button states (see #03168)
        BX = number of times specified button has been pressed since last call
        CX = column at time specified button was last pressed
        DX = row at time specified button was last pressed
Note:   at least for the Genius mouse driver, the number of button presses
          returned is limited to 7FFFh
SeeAlso: AX=0006h,INT 62/AX=007Ch

(Table 03169)
Values for mouse button number:
 0000h  left
 0001h  right
 0002h  middle (Mouse Systems/Logitech/Genius mouse)
--------M-330006-----------------------------
INT 33 - MS MOUSE v1.0+ - RETURN BUTTON RELEASE DATA
        AX = 0006h
        BX = button number (see #03169)
Return: AX = button states (see #03168)
        BX = number of times specified button has been released since last call
        CX = column at time specified button was last released
        DX = row at time specified button was last released
Note:   at least for the Genius mouse driver, the number of button releases
          returned is limited to 7FFFh
SeeAlso: AX=0005h,INT 62/AX=007Ch
--------M-330007-----------------------------
INT 33 - MS MOUSE v1.0+ - DEFINE HORIZONTAL CURSOR RANGE
        AX = 0007h
        CX = minimum column
        DX = maximum column
Note:   in text modes, the minimum and maximum columns are truncated to the
          next lower multiple of the cell size, typically 8x8 pixels
SeeAlso: AX=0008h,AX=0010h,AX=0031h,INT 62/AX=0080h
SeeAlso: INT 6F/AH=0Ch"F_SET_LIMITS_X"
--------M-330008-----------------------------
INT 33 - MS MOUSE v1.0+ - DEFINE VERTICAL CURSOR RANGE
        AX = 0008h
        CX = minimum row
        DX = maximum row
Note:   in text modes, the minimum and maximum rows are truncated to the
          next lower multiple of the cell size, typically 8x8 pixels
SeeAlso: AX=0007h,AX=0010h,AX=0031h,INT 62/AX=0080h
SeeAlso: INT 6F/AH=0Eh"F_SET_LIMITS_Y"
--------M-330009-----------------------------
INT 33 - MS MOUSE v3.0+ - DEFINE GRAPHICS CURSOR
        AX = 0009h
        BX = column of cursor hot spot in bitmap (-16 to 16)
        CX = row of cursor hot spot (-16 to 16)
        ES:DX -> mask bitmap (see #03170)
Notes:  in graphics modes, the screen contents around the current mouse cursor
          position are ANDed with the screen mask and then XORed with the
          cursor mask
        the Microsoft mouse driver v7.04 and v8.20 uses only BL and CL, so the
          hot spot row/column should be limited to -128..127
        Microsoft KnowledgeBase article Q19850 states that the high bit is
          right-most, but that statement is contradicted by all other available
          documentation
SeeAlso: AX=000Ah,AX=0012h,AX=002Ah,INT 62/AX=007Fh,INT 6F/AH=0Ah"F_DEF_MASKS"

Format of mouse mask bitmap:
Offset  Size    Description     (Table 03170)
 00h 16 WORDs   screen mask
 10h 16 WORDs   cursor mask
Note:   each word defines the sixteen pixels of a row, low bit rightmost
--------M-33000A-----------------------------
INT 33 - MS MOUSE v3.0+ - DEFINE TEXT CURSOR
        AX = 000Ah
        BX = hardware/software text cursor
            0000h software
                CX = screen mask
                DX = cursor mask
            0001h hardware
                CX = start scan line
                DX = end scan line
Note:   when the software cursor is selected, the character/attribute data at
          the current screen position is ANDed with the screen mask and then
          XORed with the cursor mask
SeeAlso: AX=0009h,INT 62/AX=007Eh
--------M-33000B-----------------------------
INT 33 - MS MOUSE v1.0+ - READ MOTION COUNTERS
        AX = 000Bh
Return: CX = number of mickeys mouse moved horizontally since last call
        DX = number of mickeys mouse moved vertically
Notes:  a mickey is the smallest increment the mouse can sense
        positive values indicate down/right
SeeAlso: AX=0003h,AX=001Bh,AX=0027h
--------M-33000C-----------------------------
INT 33 - MS MOUSE v1.0+ - DEFINE INTERRUPT SUBROUTINE PARAMETERS
        AX = 000Ch
        CX = call mask (see #03171)
        ES:DX -> FAR routine (see #03172)
SeeAlso: AX=0018h

Bitfields for mouse call mask:
Bit(s)  Description     (Table 03171)
 0      call if mouse moves
 1      call if left button pressed
 2      call if left button released
 3      call if right button pressed
 4      call if right button released
 5      call if middle button pressed (Mouse Systems/Logitech/Genius mouse)
 6      call if middle button released (Mouse Systems/Logitech/Genius mouse)
 7-15   unused
Note:   some versions of the Microsoft documentation incorrectly state that CX
          bit 0 means call if mouse cursor moves

(Table 03172)
Values interrupt routine is called with:
        AX = condition mask (same bit assignments as call mask)
        BX = button state
        CX = cursor column
        DX = cursor row
        SI = horizontal mickey count
        DI = vertical mickey count
Notes:  some versions of the Microsoft documentation erroneously swap the
          meanings of SI and DI
        in text modes, the row and column will be reported as a multiple of
          the character cell size, typically 8x8 pixels
--------M-33000D-----------------------------
INT 33 - MS MOUSE v1.0+ - LIGHT PEN EMULATION ON
        AX = 000Dh
SeeAlso: AX=000Eh,INT 10/AH=04h
--------M-33000E-----------------------------
INT 33 - MS MOUSE v1.0+ - LIGHT PEN EMULATION OFF
        AX = 000Eh
SeeAlso: AX=000Dh
--------M-33000F-----------------------------
INT 33 - MS MOUSE v1.0+ - DEFINE MICKEY/PIXEL RATIO
        AX = 000Fh
        CX = number of mickeys per 8 pixels horizontally (default 8)
        DX = number of mickeys per 8 pixels vertically (default 16)
SeeAlso: AX=0013h,AX=001Ah,INT 62/AX=0082h
--------M-330010-----------------------------
INT 33 - MS MOUSE v1.0+ - DEFINE SCREEN REGION FOR UPDATING
        AX = 0010h
        CX,DX = X,Y coordinates of upper left corner
        SI,DI = X,Y coordinates of lower right corner
Note:   mouse cursor is hidden in the specified region, and needs to be
          explicitly turned on again
SeeAlso: AX=0001h,AX=0002h,AX=0007h,AX=0010h"Genius MOUSE",AX=0031h
--------M-330010-----------------------------
INT 33 - Genius MOUSE - DEFINE SCREEN REGION FOR UPDATING
        AX = 0010h
        ES:DX -> update region list (see #03173)
Notes:  mouse cursor is hidden in the specified region, and needs to be
          explicitly turned on again
        this version of the call is described in an August 1988 version of the
          Genius Mouse programmer's reference; it has been changed to conform
          to the Microsoft version shown above by version 9.06 (and possibly
          earlier versions)
SeeAlso: AX=0001h,AX=0002h,AX=0007h,AX=0010h"MS MOUSE"

Format of Genius Mouse update region list:
Offset  Size    Description     (Table 03173)
 00h    WORD    left-most column
 02h    WORD    top-most row
 04h    WORD    right-most column
 06h    WORD    bottom-most row
--------M-330011-----------------------------
INT 33 - Genius Mouse 9.06 - GET NUMBER OF BUTTONS
        AX = 0011h
Return: AX = FFFFh
        BX = number of buttons
SeeAlso: AX=0000h
--------M-330012-----------------------------
INT 33 - MS MOUSE - SET LARGE GRAPHICS CURSOR BLOCK
        AX = 0012h
        BH = cursor width in words
        CH = rows in cursor
        BL = horizontal hot spot (-16 to 16)
        CL = vertical hot spot (-16 to 16)
        ES:DX -> bit map of screen and cursor maps
Return: AX = FFFFh if successful
SeeAlso: AX=0009h,AX=002Ah,AX=0035h
--------M-330013-----------------------------
INT 33 - MS MOUSE v5.0+ - DEFINE DOUBLE-SPEED THRESHOLD
        AX = 0013h
        DX = threshold speed in mickeys/second, 0000h = default of 64/second
Note:   if speed exceeds threshold, the cursor's on-screen motion is doubled
SeeAlso: AX=000Fh,AX=001Bh,AX=002Ch
--------M-330014-----------------------------
INT 33 - MS MOUSE v3.0+ - EXCHANGE INTERRUPT SUBROUTINES
        AX = 0014h
        CX = call mask (see #03171)
        ES:DX -> FAR routine
Return: CX = call mask of previous interrupt routine
        ES:DX = FAR address of previous interrupt routine
SeeAlso: AX=000Ch,AX=0018h
--------M-330015-----------------------------
INT 33 - MS MOUSE v6.0+ - RETURN DRIVER STORAGE REQUIREMENTS
        AX = 0015h
Return: BX = size of buffer needed to store driver state
SeeAlso: AX=0016h,AX=0017h,AX=0042h
--------M-330016-----------------------------
INT 33 - MS MOUSE v6.0+ - SAVE DRIVER STATE
        AX = 0016h
        BX = size of buffer (see AX=0015h)
        ES:DX -> buffer for driver state
Note:   although not documented (since the Microsoft driver does not use it),
          many drivers appear to require BX on input
SeeAlso: AX=0015h,AX=0017h
--------M-330017-----------------------------
INT 33 - MS MOUSE v6.0+ - RESTORE DRIVER STATE
        AX = 0017h
        BX = size of buffer (see AX=0015h)
        ES:DX -> buffer containing saved state
Notes:  although not documented (since the Microsoft driver does not use it),
          many drivers appear to require BX on input
        some mouse drivers range-check the values in the saved state based on
          the current video mode; thus, the video mode should be restored
          before the mouse driver's state is restored
SeeAlso: AX=0015h,AX=0016h
--------M-330018-----------------------------
INT 33 - MS MOUSE v6.0+ - SET ALTERNATE MOUSE USER HANDLER
        AX = 0018h
        CX = call mask (see #03174)
        ES:DX -> FAR routine to be invoked on mouse events (see #03175)
Return: AX = status
            0018h if successful
            FFFFh on error
Notes:  up to three handlers can be defined by separate calls to this function,
          each with a different combination of shift states in the call mask;
          calling this function again with a call mask of 0000h undefines the
          specified handler (official documentation); specifying the same
          call mask and an address of 0000h:0000h undefines the handler (real
          life)
        some versions of the documentation erroneously reverse the order of
          the bits in the call mask
SeeAlso: AX=000Ch,AX=0014h,AX=0019h

Bitfields for mouse call mask:
Bit(s)  Description     (Table 03174)
 0      call if mouse moves
 1      call if left button pressed
 2      call if left button released
 3      call if right button pressed
 4      call if right button released
 5      call if shift button pressed during event
 6      call if ctrl key pressed during event
 7      call if alt key pressed during event
Note:   at least one of 5-7 must be set

(Table 03175)
Values user handler is called with:
        AX = condition mask (same bit assignments as call mask)
        BX = button state
        CX = cursor column
        DX = cursor row
        SI = horizontal mickey count
        DI = vertical mickey count
Return: registers preserved
Note:   in text modes, the row and column will be reported as a multiple of
          the cell size, typically 8x8 pixels
--------M-330019-----------------------------
INT 33 - MS MOUSE v6.0+ - RETURN USER ALTERNATE INTERRUPT VECTOR
        AX = 0019h
        CX = call mask (see #03174)
Return: BX:DX = user interrupt vector
        CX = call mask (0000h if not found)
Note:   attempts to find a user event handler (defined by function 18h)
          whose call mask matches CX
SeeAlso: AX=0018h
--------M-33001A-----------------------------
INT 33 - MS MOUSE v6.0+ - SET MOUSE SENSITIVITY
        AX = 001Ah
        BX = horizontal speed \
        CX = vertical speed   / (see AX=000Fh)
        DX = double speed threshold (see AX=0013h)
SeeAlso: AX=0013h,AX=001Bh,INT 62/AX=0082h
--------M-33001B-----------------------------
INT 33 - MS MOUSE v6.0+ - RETURN MOUSE SENSITIVITY
        AX = 001Bh
Return: BX = horizontal speed
        CX = vertical speed
        DX = double speed threshold
SeeAlso: AX=000Bh,AX=001Ah
--------M-33001C-----------------------------
INT 33 - MS MOUSE v6.0+ - SET INTERRUPT RATE
        AX = 001Ch
        BX = rate (see #03176)
Notes:  only available on InPort mouse
        values greater than 4 may cause unpredictable driver behavior

(Table 03176)
Values for mouse interrupt rate:
 00h    no interrupts allowed
 01h    30 per second
 02h    50 per second
 03h    100 per second
 04h    200 per second
--------M-33001D-----------------------------
INT 33 - MS MOUSE v6.0+ - DEFINE DISPLAY PAGE NUMBER
        AX = 001Dh
        BX = display page number
Note:   the cursor will be displayed on the specified page
SeeAlso: AX=001Eh
--------M-33001E-----------------------------
INT 33 - MS MOUSE v6.0+ - RETURN DISPLAY PAGE NUMBER
        AX = 001Eh
Return: BX = display page number
SeeAlso: AX=001Dh
--------M-33001F-----------------------------
INT 33 - MS MOUSE v6.0+ - DISABLE MOUSE DRIVER
        AX = 001Fh
Return: AX = status
            001Fh successful
                ES:BX = INT 33 vector before mouse driver was first installed
            FFFFh unsuccessful
Notes:  restores vectors for INT 10 and INT 71 (8086) or INT 74 (286/386)
        if you restore INT 33 to ES:BX, driver will be completely disabled
        many drivers return AX=001Fh even though the driver has been disabled
SeeAlso: AX=0020h
--------M-330020-----------------------------
INT 33 - MS MOUSE v6.0+ - ENABLE MOUSE DRIVER
        AX = 0020h
Return: AX = status
            0020h successful
            FFFFh unsuccessful
Notes:  restores vectors for INT 10h and INT 71h (8086) or INT 74h (286/386)
          which were removed by function 1Fh
        Microsoft's documentation states that no value is returned
SeeAlso: AX=001Fh
--------M-330021-----------------------------
INT 33 - MS MOUSE v6.0+ - SOFTWARE RESET
        AX = 0021h
Return: AX = status
            FFFFh if mouse driver installed
                BX = number of buttons (FFFFh = two buttons)
            0021h if mouse driver not installed
Note:   this call is identical to funtion 00h, but does not reset the mouse
SeeAlso: AX=0000h
--------M-330022-----------------------------
INT 33 - MS MOUSE v6.0+ - SET LANGUAGE FOR MESSAGES
        AX = 0022h
        BX = language (see #03177)
Note:   only available on international versions of the driver; US versions
          ignore this call
SeeAlso: AX=0023h

(Table 03177)
Values for mouse driver language:
 00h    English
 01h    French
 02h    Dutch
 03h    German
 04h    Swedish
 05h    Finnish
 06h    Spanish
 07h    Portugese
 08h    Italian
--------M-330023-----------------------------
INT 33 - MS MOUSE v6.0+ - GET LANGUAGE FOR MESSAGES
        AX = 0023h
Return: BX = language (see #03177)
Note:   the US version of the driver always returns zero
SeeAlso: AX=0022h
--------M-330024-----------------------------
INT 33 - MS MOUSE v6.26+ - GET SOFTWARE VERSION, MOUSE TYPE, AND IRQ NUMBER
        AX = 0024h
Return: AX = FFFFh on error
        otherwise,
            BH = major version
            BL = minor version
            CH = type (1=bus, 2=serial, 3=InPort, 4=PS/2, 5=HP)
            CL = interrupt (0=PS/2, 2=IRQ2, 3=IRQ3,...,7=IRQ7,...,0Fh=IRQ15)
SeeAlso: AX=004Dh,AX=006Dh
--------M-330025-----------------------------
INT 33 - MS MOUSE v6.26+ - GET GENERAL DRIVER INFORMATION
        AX = 0025h
Return: AX = general information (see #03178)
        BX = cursor lock flag for OS/2 to prevent reentrancy problems
        CX = mouse code active flag (for OS/2)
        DX = mouse driver busy flag (for OS/2)

Bitfields for general mouse driver information:
Bit(s)  Description     (Table 03178)
 15     driver loaded as device driver rather than TSR
 14     driver is newer integrated type
 13,12  current cursor type
        00 software text cursor
        01 hardware text cursor (CRT Controller's cursor)
        1X graphics cursor
 11-8   interrupt rate (see #03176)
 7-0    count of currently-active Mouse Display Drivers (MDD), the newer
          integrated driver type
--------M-330026-----------------------------
INT 33 - MS MOUSE v6.26+ - GET MAXIMUM VIRTUAL COORDINATES
        AX = 0026h
Return: BX = mouse-disabled flag (0000h mouse enabled, nonzero disabled)
        CX = maximum virtual X (for current video mode)
        DX = maximum virtual Y
Note:   for driver versions before 7.05, this call returns the currently-set
          maximum coordinates; v7.05+ returns the absolute maximum coordinates
SeeAlso: AX=0031h
--------M-330026-----------------------------
INT 33 - Genius Mouse 9.06 - ???
        AX = 0026h
Return: CX = 0204h if CX was 0105h on entry, else unchanged
--------M-330027-----------------------------
INT 33 - MS MOUSE v7.01+ - GET SCREEN/CURSOR MASKS AND MICKEY COUNTS
        AX = 0027h
Return: AX = screen-mask value (or hardware cursor scan-line start for v7.02+)
        BX = cursor-mask value (or hardware cursor scan-line stop for v7.02+)
        CX = horizontal mickeys moved since last call
        DX = vertical mickeys moved since last call
SeeAlso: AX=000Bh
--------M-330028-----------------------------
INT 33 - MS MOUSE v7.0+ - SET VIDEO MODE
        AX = 0028h
        CX = new video mode (call is NOP if 0000h)
        DH = Y font size (00h = default)
        DL = X font size (00h = default)
Return: CL = status (00h = successful)
Notes:  DX is ignored unless the selected video mode supports font size control
        when CX=0000h, an internal flag that had been set by a previous call
          is cleared; this is required before a mouse reset
SeeAlso: AX=0029h,INT 10/AH=00h
--------M-330029-----------------------------
INT 33 - MS MOUSE v7.0+ - ENUMERATE VIDEO MODES
        AX = 0029h
        CX = previous video mode
            0000h get first supported video mode
            other get next supported mode after mode CX
Return: CX = first/next video mode (0000h = no more video modes)
        DS:DX -> description of video mode or 0000h:0000h if none
Notes:  the enumerated video modes may be in any order and may repeat
        the description string (if available) is terminated by '$' followed by
          a NUL byte
SeeAlso: AX=0028h
--------M-33002A-----------------------------
INT 33 - MS MOUSE v7.02+ - GET CURSOR HOT SPOT
        AX = 002Ah
Return: AX = internal counter controlling cursor visibility
        BX = cursor hot spot column
        CX = cursor hot spot row
        DX = mouse type (see #03179)
Note:   the hot spot location is relative to the upper left corner of the
          cursor block and may range from -128 to +127 both horizontally and
          vertically
SeeAlso: AX=0009h,AX=0012h,AX=0035h

(Table 03179)
Values for mouse type:
 00h    none
 01h    bus
 02h    serial
 03h    InPort
 04h    IBM
 05h    Hewlett-Packard
--------M-33002B-----------------------------
INT 33 - MS MOUSE v7.0+ - LOAD ACCELERATION PROFILES
        AX = 002Bh
        BX = active acceleration profile
            0001h-0004h or FFFFh to restore default curves
        ES:SI -> buffer containing acceleration profile data (see #03180)
Return: AX = success flag
SeeAlso: AX=002Ch,AX=002Dh,AX=0033h

Format of acceleration profile data:
Offset  Size    Description     (Table 03180)
 00h    BYTE    length of acceleration profile 1
 01h    BYTE    length of acceleration profile 2
 02h    BYTE    length of acceleration profile 3
 03h    BYTE    length of acceleration profile 4
 04h 32 BYTEs   threshold speeds for acceleration profile 1
 24h 32 BYTEs   threshold speeds for acceleration profile 2
 44h 32 BYTEs   threshold speeds for acceleration profile 3
 64h 32 BYTEs   threshold speeds for acceleration profile 4
 84h 32 BYTEs   speedup factor for acceleration profile 1
                (10h = 1.0, 14h = 1.25, 20h = 2.0, etc)
 A4h 32 BYTEs   speedup factor for acceleration profile 2
                (10h = 1.0, 14h = 1.25, 20h = 2.0, etc)
 C4h 32 BYTEs   speedup factor for acceleration profile 3
                (10h = 1.0, 14h = 1.25, 20h = 2.0, etc)
 E4h 32 BYTEs   speedup factor for acceleration profile 4
                (10h = 1.0, 14h = 1.25, 20h = 2.0, etc)
104h 16 BYTEs   name of acceleration profile 1 (blank-padded)
114h 16 BYTEs   name of acceleration profile 2 (blank-padded)
124h 16 BYTEs   name of acceleration profile 3 (blank-padded)
134h 16 BYTEs   name of acceleration profile 4 (blank-padded)
Note:   unused bytes in the threshold speed fields are filled with 7Fh and
          unused bytes in the speedup factor fields are filled with 10h
--------M-33002C-----------------------------
INT 33 - MS MOUSE v7.0+ - GET ACCELERATION PROFILES
        AX = 002Ch
Return: AX = status (0000h success)
        BX = currently-active acceleration profile
        ES:SI -> acceleration profile data (see #03180)
SeeAlso: AX=002Bh,AX=002Dh,AX=0033h
--------M-33002D-----------------------------
INT 33 - MS MOUSE v7.0+ - SELECT ACCELERATION PROFILE
        AX = 002Dh
        BX = acceleration level
            0001h-0004h to set profile, or FFFFh to get current profile
Return: AX = status
            0000h successful
                ES:SI -> 16-byte blank-padded name of acceleration profile
            FFFEh invalid acceleration curve number
                ES:SI destroyed
        BX = active acceleration curve number
SeeAlso: AX=0013h,AX=002Bh,AX=002Ch,AX=002Eh
--------M-33002E-----------------------------
INT 33 - MS MOUSE v8.10+ - SET ACCELERATION PROFILE NAMES
        AX = 002Eh
        BL = flag (if nonzero, fill ES:SI buffer with default names on return)
        ES:SI -> 64-byte buffer containing profile names (16 bytes per name)
Return: AX = status (0000h success)
            FFFEh error for ATI Mouse driver
        ES:SI buffer filled with default names if BL nonzero on entry
Notes:  not supported by Logitech driver v6.10
        supported by ATI Mouse driver v7.04
SeeAlso: AX=002Ch,AX=002Dh,AX=012Eh,AX=022Eh
--------M-33002F-----------------------------
INT 33 - MS MOUSE v7.02+ - MOUSE HARDWARE RESET
        AX = 002Fh
Return: AX = status
Note:   invoked by mouse driver v8.20 on being called with INT 2F/AX=530Bh
SeeAlso: INT 2F/AH=53h
--------M-330030-----------------------------
INT 33 - MS MOUSE v7.04+ - GET/SET BallPoint INFORMATION
        AX = 0030h
        CX = command
            0000h get status of BallPoint device
            other set rotation angle and masks
                BX = rotation angle (-32768 to 32767 degrees)
                CH = primary button mask
                CL = secondary button mask
Return: AX = button status (FFFFh if no BallPoint) (see #03181)
        BX = rotation angle (0-360 degrees)
        CH = primary button mask
        CL = secondary button mask
Note:   not supported by the ATI Mouse driver which calls itself v7.04

Bitfields for BallPoint mouse button status:
Bit(s)  Description     (Table 03181)
 5      button 1
 4      button 2
 3      button 3
 2      button 4
 other  zero
--------M-330031-----------------------------
INT 33 - MS MOUSE v7.05+ - GET CURRENT MINIMUM/MAXIMUM VIRTUAL COORDINATES
        AX = 0031h
Return: AX = virtual X minimum
        BX = virtual Y minimum
        CX = virtual X maximum
        DX = virtual Y maximum
Note:   the minimum and maximum values are those set by AX=0007h and AX=0008h;
          the default is minimum = 0 and maximum = absolute maximum
          (see AX=0026h)
SeeAlso: AX=0007h,AX=0008h,AX=0010h,AX=0026h
--------M-330032-----------------------------
INT 33 - MS MOUSE v7.05+ - GET ACTIVE ADVANCED FUNCTIONS
        AX = 0032h
Return: AX = active function flags (FFFFh for v8.10)
            bit 15: function 0025h supported
            bit 14: function 0026h supported
            ...
            bit 0:  function 0034h supported
        BX = ??? (0000h) officially unused
        CX = ??? (E000h) officially unused
        DX = ??? (0000h) officially unused
Note:   the Italian version of MS MOUSE v8.20 reportedly indicates that
          functions 0033h and 0034h are not supported even though they are
--------M-330033-----------------------------
INT 33 - MS MOUSE v7.05+ - GET SWITCH SETTINGS AND ACCELERATION PROFILE DATA
        AX = 0033h
        CX = size of buffer
            0000h get required buffer size
                Return: AX = 0000h
                        CX = required size (0154h for Logitech v6.10, 0159h
                                for MS v8.10-8.20)
            other
                ES:DX -> buffer of CX bytes for mouse settings
                Return: AX = 0000h
                        CX = number of bytes returned
                        ES:DX buffer filled (see #03182)
SeeAlso: AX=002Bh

Format of mouse settings data buffer:
Offset  Size    Description     (Table 03182)
 00h    BYTE    mouse type
 01h    BYTE    current language
 02h    BYTE    horizontal sensitivity (00h-64h)
 03h    BYTE    vertical sensitivity (00h-64h)
 04h    BYTE    double-speed threshold (00h-64h)
 05h    BYTE    ballistic curve (01h-04h)
 06h    BYTE    interrupt rate (01h-04h)
 07h    BYTE    cursor override mask
 08h    BYTE    laptop adjustment
 09h    BYTE    memory type (00h-02h)
 0Ah    BYTE    SuperVGA support (00h,01h)
 0Bh    BYTE    rotation angle
 0Ch    BYTE    ???
 0Dh    BYTE    primary button (01h-04h)
 0Eh    BYTE    secondary button (01h-04h)
 0Fh    BYTE    click lock enabled (00h,01h)
 10h 324 BYTEs  acceleration profile data (see #03180)
154h  5 BYTEs   ??? (Microsoft driver, but not Logitech)
--------M-330034-----------------------------
INT 33 - MS MOUSE v8.0+ - GET INITIALIZATION FILE
        AX = 0034h
Return: AX = status (0000h successful)
        ES:DX -> ASCIZ initialization (.INI) file name
--------M-330035-----------------------------
INT 33 - MS MOUSE v8.10+ - LCD SCREEN LARGE POINTER SUPPORT
        AX = 0035h
        BX = function
            FFFFh get current settings
                Return: AX = 0000h
                        BH = style (see #03183)
                        BL = size (see #03184)
                        CH = threshold (00h-64h)
                        CL = active flag (00h disabled, 01h enabled)
                        DX = delay
            other
                BH = pointer style (see #03183)
                BL = size (see #03184)
                CH = threshold (00h-64h)
                CL = active flag (00h disable size change, 01h enable)
                DX = delay (0000h-0064h)
                Return: AX = 0000h
Note:   not supported by Logitech driver v6.10
SeeAlso: AX=0012h,AX=002Ah

(Table 03183)
Values for pointer style:
 00h    normal
 01h    reverse
 02h    transparent
SeeAlso: #03184

(Table 03184)
Values for pointer size:
 00h    small ("1")
 01h    medium ("1.5")
 02h    large ("2")
SeeAlso: #03183
--------M-330042-----------------------------
INT 33 - PCMOUSE - GET MSMOUSE STORAGE REQUIREMENTS
        AX = 0042h
Return: AX = status
            0000h MSMOUSE not installed
            0042h functions 42h, 50h, and 52h not supported
            FFFFh successful
                BX = buffer size in bytes for functions 50h and 52h
Note:   this function is also supported by the Genius Mouse 9.06 driver
SeeAlso: AX=0015h,AX=0050h,AX=0052h
--------M-330043-----------------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - CONFIGURE MOUSE???
        AX = 0043h
        CX:BX -> configuration buffer (see #03185)
        DL = ???
Return: ???
Notes:  also calls routines for INT 33/AX=0053h and INT 33/AX=004Fh
        this function is also supported by the Genius Mouse 9.06 driver

Format of Mouse Systems configuration buffer:
Offset  Size    Description     (Table 03185)
 00h    WORD    I/O port address
 02h    BYTE    ???
 03h    BYTE    interrupt number
 04h    BYTE    interrupt mask for interrupt controller
 05h  5 BYTEs   ???
--------M-330044CXCDEF-----------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - TOGGLE IGNORE ACCELERATION CMDS
        AX = 0044h
        CX = CDEFh
Return: AX = new state of "Ignore Application Acceleration Commands" flag
Note:   this function is also supported by the Genius Mouse 9.06 driver
SeeAlso: AX=0045h
--------M-330045CXCDEF-----------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - TOGGLE RESOLUTION DOUBLING
        AX = 0045h
        CX = CDEFh
Return: AX = new state of resolution doubling flag
Note:   this function is also supported by the Genius Mouse 9.06 driver
SeeAlso: AX=0044h
--------M-330047-----------------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - SET BUTTON ASSIGNMENTS
        AX = 0047h
        ES:BX -> button assignments (3 bytes, combinations of "L", "M", "R")
Return: ???
Note:   also supported by Genius Mouse 9.06 driver
SeeAlso: AX=0067h
--------M-330048BXCDEF-----------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - GET ???
        AX = 0048h
        BX = CDEFh
Return: CX = ???
        BH = ???
        BL = ??? (if 50h, driver is using PS/2 pointing device BIOS interface)
Note:   also supported by Genius Mouse 9.06 driver
--------M-33004B-----------------------------
INT 33 - LCS/Telegraphics MOUSE DRIVERS - INSTALLATION CHECK / GET VERSION
        AX = 004Bh
Return: ES:DI -> ASCIZ signature/description string if installed (see #03186)

(Table 03186)
Values for LCS/Telegraphics mouse driver OEM signature/description string:
 "Primax Generic;Universal Mouse Driver;IMOUSE;v8.20i"
 "Synaptics;TouchPad Driver;SYNTOUCH;v2.26"
 "Z-NIX;BUS,AUX,Serial 3-byte and 5-byte Mouse Driver;ZMOUSE;v7.04d"
Note:   the string consists of OEM, driver description, driver name, and
          version number
--------M-33004CBXCDEF-----------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - SET ??? FLAG
        AX = 004Ch
        BX = CDEFh
Note:   also supported by Genius Mouse 9.06
SeeAlso: AX=006Ch
--------M-33004D-----------------------------
INT 33 - MS MOUSE - RETURN POINTER TO COPYRIGHT STRING
        AX = 004Dh
Return: ES:DI -> copyright message "*** This is Copyright 1983 Microsoft" or
                "Copyright 19XX...."
Notes:  also supported by Logitech, Kraft, Genius Mouse, and Mouse Systems
          mouse drivers
        in the Genius Mouse 9.06 driver, the ASCIZ signature "KYE" immediately
          follows the above copyright message (KYE Corp. manufactures the
          driver)
SeeAlso: AX=0024h,AX=006Dh,AX=0666h
--------M-33004F-----------------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - ENABLE MOUSE
        AX = 004Fh
Return: nothing
Note:   also supported by Genius Mouse 9.06
SeeAlso: AX=0043h,AX=0053h
--------M-330050-----------------------------
INT 33 - PCMOUSE - SAVE MSMOUSE STATE
        AX = 0050h
        BX = buffer size (ignored by some driver versions)
        ES:DX -> buffer
Return: AX = FFFFh if successful
Notes:  the buffer must be large enough to hold the entire state, or following
          data will be overwritten by state data in versions which ignore BX;
          use INT 33/AX=0042h to get the required size
        this function is also supported by the Genius Mouse 9.06 driver
SeeAlso: AX=0042h,AX=0052h
--------M-330052-----------------------------
INT 33 - PCMOUSE - RESTORE MSMOUSE STATE
        AX = 0052h
        BX = buffer size (ignored by some driver versions)
        ES:DX -> buffer
Return: AX = FFFFh if successful
Note:   also supported by Genius Mouse 9.06 driver
SeeAlso: AX=0050h
--------M-330053-----------------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - DISABLE MOUSE
        AX = 0053h
Return: nothing
Note:   also supported by Genius Mouse 9.06
SeeAlso: AX=0043h,AX=004Fh
--------M-330054CXCDEF-----------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - SELECT ULTRARES ACCELERATION LEVEL
        AX = 0054h
        CX = CDEFh
        BX = new acceleration level (0-9)
Return: ???
Note:   this function is also supported by the Genius Mouse 9.06 driver
SeeAlso: AX=005Ah
--------M-330055-----------------------------
INT 33 - Kraft Mouse - GET ???
        AX = 0055h
Return: CX = ???
        DX = ???
        ES = ???
--------M-330058-----------------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - ???
        AX = 0058h
Return: AX = CS of driver
        CX:BX = original INT 33 vector
        DX = ???
Note:   this function is also supported by the Genius Mouse 9.06 driver
--------M-33005A-----------------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - SET ULTRARES ACCELERATIONS
        AX = 005Ah
        CX = number of WORDs to copy (max 0014h, but not range-checked)
        DX:SI -> buffer containing thresholds??? (CX words)
        DX:BX -> buffer containing acceleration values???
                (9*14h words, only first CX of each 14h used)
        ???
Return: CF clear
        ???
Note:   this function is also supported by Genius Mouse 9.06
SeeAlso: AX=0054h
--------M-330061BXCDEF-----------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - ???
        AX = 0061h
        BX = CDEFh
Return: CX = ???
Note:   also supported by Genius Mouse 9.06
--------M-330067-----------------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - GET MOUSE BUTTONS???
        AX = 0067h
Return: BL = number of buttons???
Note:   also supported by Genius Mouse 9.06
SeeAlso: AX=0047h
--------M-33006A-----------------------------
INT 33 U - ATI Mouse - INSTALLATION CHECK
        AX = 006Ah
Return: AL = AAh
        AH = ???
        BH = ???
        BL = ???
        CL = ???
        CH = ???
Program: ATI's MOUSE.COM and MOUSE.SYS are drivers for the mouse port found on
          some of ATI's video adapters
SeeAlso: AX=006Dh
--------M-33006C-----------------------------
INT 33 U - TRUEDOX Mouse driver v4.01 - GET/SET HARDWARE PARAMETERS
        AX = 006Ch
        BX = new IRQ (0003h or 0004h), or 0000h to get current values only
        CL = new IRQmask (sent to 8259)
        DX = new base I/O port
Return: BX = current IRQ
        DX = light pen state???
Note:   this is the mouse driver for the Dell Dimension series of computers, by
          TRUEDOX Technology Corporation
SeeAlso: AX=00A1h,AX=0666h
--------M-33006CBXCDEF-----------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - CLEAR ??? FLAG
        AX = 006Ch
        BX = CDEFh
Note:   also supported by Genius Mouse 9.06
SeeAlso: AX=004Ch
--------M-33006D-----------------------------
INT 33 - MS MOUSE - GET VERSION STRING
        AX = 006Dh
Return: ES:DI -> Microsoft version number of resident driver (see #03187)
Notes:  also supported by Logitech, Mouse Systems, Kraft, and Genius mouse
          drivers
        the Mouse Systems 7.01 and Genius Mouse 9.06 drivers report their
          Microsoft version as 7.00 even though they do not support any of the
          functions from 0025h through 002Dh supported by the MS 7.00 driver
          (the Genius Mouse driver supports function 0026h, but it differs
          from the Microsoft function)
        the TRUEDOX 4.01 driver reports its version as 6.26 through this call,
          but as 6.24 through AX=0024h
SeeAlso: AX=0024h,AX=004Dh,AX=006Ah,AX=266Ch

Format of Microsoft version number:
Offset  Size    Description     (Table 03187)
 00h    BYTE    major version
 01h    BYTE    minor version (BCD)
--------M-330070BXABCD-----------------------
INT 33 - Mouse Systems MOUSE DRIVER - POPUP.COM - INSTALLATION CHECK
        AX = 0070h
        BX = ABCDh
Return: AX = ABCDh if installed
            BX:CX -> data structure (see #03188)
Notes:  this function is also supported by the Genius Mouse 9.06 driver
        the v7.01 POPUP.COM and menu drivers also check for the signature
          CDh ABh BAh DCh at offset -2Ch from the interrupt handler
        if POPUP is not loaded, the returned data structure contains the proper
          signature at offset 00h, but not at offset 08h

Format of Mouse Systems POPUP.COM data structure:
Offset  Size    Description     (Table 03188)
 00h    WORD    signature ABCDh
 02h    DWORD   pointer to info structure??? (see #03189)
 06h  2 BYTEs   ???
 08h    WORD    signature ABCDh

Format of Mouse Systems POPUP.COM info structure:
Offset  Size    Description     (Table 03189)
 00h    WORD    driver version
 02h  8 BYTEs   ???
 0Ah    WORD    segment of ???
        ???
--------M-330072BXABCD-----------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - ???
        AX = 0072h
        BX = ABCDh
Return: ???
Note:   this function is also supported by the Genius Mouse 9.06 driver
--------M-330073BXCDEF-----------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - GET BUTTON ASSIGNMENTS
        AX = 0073h
        BX = CDEFh
        ES:DX -> 3-byte buffer for button assignments
Return: CX = number of buttons???
        ES:DX buffer filled (default is "LMR")
Note:   also supported by Genius Mouse 9.06
SeeAlso: AX=0067h
--------M-3300A0-----------------------------
INT 33 U - TRUEDOX Mouse driver - SET HARDWARE PC MODE (3 button)
        AX = 00A0h
Return: nothing
Note:   this function is only available if the mouse mode is switchable
          through the power pins
SeeAlso: AX=006Ch"TRUEDOX",AX=00A1h"TRUEDOX"
--------M-3300A1-----------------------------
INT 33 U - TRUEDOX Mouse driver - SET HARDWARE MS MODE (2 button)
        AX = 00A1h
Return: nothing
Notes:  this function is only available if the mouse mode is switchable
          through the power pins
        this is the mouse driver for the Dell Dimension series of computers, by
          TRUEDOX Technology Corporation
SeeAlso: AX=006Ch"TRUEDOX",AX=00A0h"TRUEDOX",AX=00A6h,AX=0666h
--------M-3300A6-----------------------------
INT 33 U - TRUEDOX Mouse driver - SET RESOLUTION
        AX = 00A6h
        BX = new software resolution
            0001h 50-200 dpi
            0002h 200-400 dpi
            0003h 400-800 dpi
Note:   this is the mouse driver for the Dell Dimension series of computers, by
          TRUEDOX Technology Corporation
SeeAlso: AX=00A0h,AX=00A1h,AX=0666h
--------M-3300B0-----------------------------
INT 33 U - LCS/Telegraphics MOUSE DRIVERS - ???
        AX = 00B0h
        ???
Return: ???
--------M-3300D6-----------------------------
INT 33 - Twiddler TWMOUSE - GET BUTTON/TILT STATE
        AX = 00D6h
Return: AX = current button bitmap
        BX = current X tilt (approximately -200..+200 = -90degrees..+90deg.)
        CX = current Y tilt
Program: the Twiddler is a chording keyboard/mouse combination by Handykey
          Corporation
--------M-3300F0-----------------------------
INT 33 U - LCS/Telegraphics MOUSE DRIVERS - ???
        AX = 00F0h
        ???
Return: ???
--------M-3300F1-----------------------------
INT 33 U - LCS/Telegraphics MOUSE DRIVERS - ???
        AX = 00F1h
        ???
Return: ???
--------M-3300F2-----------------------------
INT 33 U - LCS/Telegraphics MOUSE DRIVERS - ???
        AX = 00F2h
        ???
Return: ???
--------M-3300F3-----------------------------
INT 33 U - LCS/Telegraphics MOUSE DRIVERS - ???
        AX = 00F3h
        ???
Return: ???
--------M-330100CX4752-----------------------
INT 33 - GRTMOUSE v1.00+ - INSTALLATION CHECK
        AX = 0100h
        CX = 4752h ('GR')
        DX = 544Dh ('TM')
Return: AX = 474Dh ('GM') if installed
            CX = version number (CH = major, CL = minor)
Program: GRTMOUSE is a graphical-cursor driver for textmode by Tommer Leyvand
SeeAlso: AX=0101h,AX=0102h,AX=0103h,AX=0104h
--------M-330101-----------------------------
INT 33 - GRTMOUSE v1.00+ - SET MOUSE CURSOR SHAPE
        AX = 0101h
        DS:SI -> 16-byte cursor pattern
Return: CF clear if successful
SeeAlso: AX=0100h,AX=0102h
--------M-330102-----------------------------
INT 33 - GRTMOUSE v1.00+ - GET MOUSE CURSOR SHAPE
        AX = 0102h
        ES:DI -> 16-byte buffer for cursor pattern
SeeAlso: AX=0100h,AX=0101h
--------M-330103-----------------------------
INT 33 - GRTMOUSE v1.00+ - SET ACTIVE CHARACTERS
        AX = 0103h
        CH,CL,DH,DL = ASCII codes to be remapped to display mouse pointer
Note:   the default active characters are D0h,D1h,D6h,D8h; the active
         characters should be in the range C0h to DFh
SeeAlso: AX=0100h,AX=0104h
--------M-330104-----------------------------
INT 33 - GRTMOUSE v1.00+ - GET ACTIVE CHARACTERS
        AX = 0104h
Return: CH,CL,DH,DL = ASCII codes for the active characters
SeeAlso: AX=0100h,AX=0103h
--------M-33012E-----------------------------
INT 33 - MS MOUSE v8.10+ - ???
        AX = 012Eh
        BL = ???
Return: AX = 0000h (MS)
        AX = FFFFh (ATI Mouse v7.04)
Note:   not supported by Logitech driver v6.10
SeeAlso: AX=002Eh,AX=022Eh
--------M-33022E-----------------------------
INT 33 - MS MOUSE v8.10+ - ???
        AX = 022Eh
        BL = ???
Return: AX = 0000h (MS)
        AX = FFFFh (ATI Mouse v7.04)
Note:   not supported by Logitech driver v6.10
SeeAlso: AX=002Eh,AX=012Eh
--------M-330666-----------------------------
INT 33 U - TRUEDOX Mouse driver v4.01 - GET COPYRIGHT STRING
        AX = 0666h
Return: DX:AX -> ASCII "Copyright 1987-1992 TRUEDOX Technology Corporation"
Note:   this is the mouse driver for the Dell Dimension series of computers,
          by TRUEDOX Technology Corporation
SeeAlso: AX=004Dh,AX=00A6h,AX=0666h
--------M-33136C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - ???
        AX = 136Ch
        BX = ???
Return: AX = ???
        BX = ???
--------M-33146C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - GET/SET ???
        AX = 146Ch
        BL = function
            00h set ???
                BH = new value (zero/nonzero to clear/set)
            else get ???
                Return: ???
--------M-33156C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - GET SIGNATURE AND VERSION STRINGS
        AX = 156Ch
Return: ES:DI -> signature "LOGITECH MOUSE DRIVER"
        ES:SI -> version string, terminated with CRLF
--------M-33166C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - ???
        AX = 166Ch
        BL = ???
            00h ???
            01h ???
            other ???
                BH = new value of ???
                Return: AX = FFFFh
--------M-33176C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - ???
        AX = 176Ch
        ???
Return: ???
--------M-33186C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - ???
        AX = 186Ch
        ???
Return: ???
--------M-33196C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - ???
        AX = 196Ch
        ???
Return: ???
--------M-331A6C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - GET ???
        AX = 1A6Ch
Return: AX = FFFFh
        BX = ???
        CX = ???
SeeAlso: AX=1B6Ch
--------M-331B6C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - SET ???
        AX = 1B6Ch
        BX = new value for ??? (0000h-0003h)
Return: AX = FFFFh
SeeAlso: AX=1A6Ch
--------M-331C6C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - ???
        AX = 1C6Ch
        BX = ???
            <42h ???
            =42h ???
            >42h ???
                ES:DI -> ???
                Return: AX = ???
--------M-331D6C-----------------------------
INT 33 - LOGITECH MOUSE - GET COMPASS PARAMETER
        AX = 1D6Ch
Return: BX = direction (0=north, 1=south, 2=east, 3=west)
SeeAlso: AX=1E6Ch
--------M-331E6C-----------------------------
INT 33 - LOGITECH MOUSE - SET COMPASS PARAMETER
        AX = 1E6Ch
        BX = direction (0=north, 1=south, 2=east, 3=west)
SeeAlso: AX=1D6Ch
--------M-331F6C-----------------------------
INT 33 - LOGITECH MOUSE - GET BALLISTICS INFORMATION
        AX = 1F6Ch
Return: BX = 0=off, 1=on
        CX = 1=low, 2=high
SeeAlso: AX=002Ch,AX=236Ch
--------M-33206C-----------------------------
INT 33 - LOGITECH MOUSE - SET LEFT OR RIGHT PARAMETER
        AX = 206Ch
        BX = parameter (00h = right, FFh = left)
SeeAlso: AX=216Ch
--------M-33216C-----------------------------
INT 33 - LOGITECH MOUSE - GET LEFT OR RIGHT PARAMETER
        AX = 216Ch
Return: BX = parameter (00h = right, FFh = left)
SeeAlso: AX=206Ch
--------M-33226C-----------------------------
INT 33 - LOGITECH MOUSE - REMOVE DRIVER FROM MEMORY
        AX = 226Ch
Note:   this only frees memory; does not restore hooked interrupts
--------M-33236C-----------------------------
INT 33 - LOGITECH MOUSE - SET BALLISTICS INFORMATION
        AX = 236Ch
        BX = 0=off, 1=on
        CX = 1=low, 2=high
SeeAlso: AX=002Ch,AX=1F6Ch
--------M-33246C-----------------------------
INT 33 - LOGITECH MOUSE - GET PARAMETERS AND RESET SERIAL MOUSE
        AX = 246Ch
        ES:DX -> parameter table buffer (see #03190)
Return: AX = FFFFh if driver installed for serial mouse
SeeAlso: AX=0000h,AX=256Ch/BX=0000h,AX=256Ch/BX=0001h,AX=256Ch/BX=0003h

Format of Logitech Mouse parameter table:
Offset  Size    Description     (Table 03190)
 00h    WORD    baud rate divided by 100  (serial mouse only)
 02h    WORD    emulation                 (serial mouse only)
 04h    WORD    report rate               (serial mouse only)
 06h    WORD    firmware revision         (serial mouse only)
 08h    WORD    00h                       (serial mouse only)
 0Ah    WORD    port                      (serial mouse only)
 0Ch    WORD    physical buttons
 0Eh    WORD    logical buttons
--------M-33256CBX0000-----------------------
INT 33 - LOGITECH MOUSE - SET PARAMETERS - SET BAUD RATE (SERIAL MOUSE ONLY)
        AX = 256Ch
        BX = 0000h
        CX = rate (0=1200, 1=2400, 2=4800, 3=9600)
Return: AX = FFFFh if driver installed for serial mouse
SeeAlso: AX=246Ch,AX=256Ch/BX=0001h,AX=256Ch/BX=0002h,AX=276Ch
--------M-33256CBX0001-----------------------
INT 33 - LOGITECH MOUSE - SET PARAMETERS - SET EMULATION (SERIAL MOUSE ONLY)
        AX = 256Ch
        BX = 0001h
        CX = emulation type (see #03191)
Return: AX = FFFFh if driver installed for serial mouse
SeeAlso: AX=246Ch,AX=256Ch/BX=0000h,AX=256Ch/BX=0003h,AX=276Ch

(Table 03191)
Values for Logitech mouse emulation type:
 00h    5 byte packed binary
 01h    3 byte packed binary
 02h    hexadecimal
 03h    relative bit pad
 04h    not supported
 05h    MM Series
 06h    not supported
 07h    Microsoft
--------M-33256CBX0002-----------------------
INT 33 - LOGITECH MOUSE - SET PARAMETERS - SET REPORT RATE (SERIAL MOUSE ONLY)
        AX = 256Ch
        BX = 0002h
        CX = rate (0=10, 1=20, 2=35, 3=50, 4=70, 5=100, 6=150)
Return: AX = FFFFh if driver installed for serial mouse
SeeAlso: AX=246Ch,AX=256Ch/BX=0001h,AX=256Ch/BX=0003h,AX=276Ch
--------M-33256CBX0003-----------------------
INT 33 - LOGITECH MOUSE - SET PARAMETERS - SET MOUSE PORT (SERIAL MOUSE ONLY)
        AX = 256Ch
        BX = 0003h
        CX = port (1, 2)
Return: AX = FFFFh if driver installed for serial mouse
SeeAlso: AX=246Ch,AX=256Ch/BX=0000h,AX=256Ch/BX=0004h,AX=276Ch
--------M-33256CBX0004-----------------------
INT 33 - LOGITECH MOUSE - SET PARAMETERS - SET MOUSE LOGICAL BUTTONS
        AX = 256Ch
        BX = 0004h
        CX = buttons (2, 3)
Return: AX = FFFFh if driver installed for serial mouse
SeeAlso: AX=246Ch,AX=276Ch
--------M-33266C-----------------------------
INT 33 - LOGITECH MOUSE - GET VERSION???
        AX = 266Ch
Return: BX = 'SS'
        CH = '4'  major version number
        CL = '1'  minor version number
SeeAlso: AX=006Dh
--------M-33276C-----------------------------
INT 33 - LOGITECH MOUSE - ??? Tries MMSeries, Baud 2400
        AX = 276Ch
SeeAlso: AX=256Ch
--------M-333000-----------------------------
INT 33 - Smooth Mouse Driver, PrecisePoint - INSTALLATION CHECK
        AX = 3000h
Return: AX = FFFFh if installed
            BX = version number (BH = major, BL = minor)
Program: SMD is a programmer's library by Andy Hakim which provides a
          graphics-style mouse cursor in text mode.  PrecisePoint is an
          SMD-based TSR which replaces the block mouse cursor in text
          applications.
SeeAlso: AX=0000h,AX=3001h,AX=3003h
--------M-333001-----------------------------
INT 33 - Smooth Mouse Driver, PrecisePoint - ENABLE SMOOTH MOUSE
        AX = 3001h
Return: AX = status (0000h = disabled, 0001h = enabled)
Note:   SMD remains disabled if running under Desqview or in graphics mode
SeeAlso: AX=0001h,AX=0002h,AX=3002h
--------M-333002-----------------------------
INT 33 - Smooth Mouse Driver, PrecisePoint - DISABLE SMOOTH MOUSE
        AX = 3002h
Return: AX = status (0000h = disabled, 0001h = enabled)
SeeAlso: AX=0001h,AX=0002h,AX=3000h,AX=3001h
--------M-333003-----------------------------
INT 33 - Smooth Mouse Driver, PrecisePoint - GET INFORMATION
        AX = 3003h
        BL = data structure selector
            00h Primary Bitmap (used for 25 line mode) (see #03192)
            01h Secondary Bitmap (used for 43/50 line modes) (see #03192)
            02h Sacrifice Character Map (see #03193)
            03h Program Information (see #03194)
Return: ES:DX -> selected data structure
SeeAlso: AX=3000h

Format of Primary/Secondary Bitmap [SMD_BITMAP_STRUCT]:
Offset  Size    Description     (Table 03192)
 00h    BYTE    vertical size of bitmap (00h - 10h)
 01h    BYTE    horizontal size of bitmap (00h - 10h)
 02h    BYTE    vertical hotspot position (00h - 10h)
 03h    BYTE    horizontal hotspot position (00h - 10h)
 04h 16 WORDs   cursor bitmap data
 14h 16 WORDs   screen bitmap data

Format of Sacrifice Character Map [SMD_SMAP_STRUCT]:
Offset  Size    Description     (Table 03193)
 00h    BYTE    bytes are character values (00h-FFh) used in place of the
 01h    BYTE    actual character for the corresponding position on the screen
 02h    BYTE         +--------------+     occupied by part or all of the mouse
 03h    BYTE         | 0h | 1h | 2h |     cursor
 04h    BYTE         |----+----+----|
 05h    BYTE         | 3h | 4h | 5h |
 06h    BYTE         |----+----+----|
 07h    BYTE         | 6h | 7h | 8h |
 08h    BYTE         +--------------+

Format of Program Information [SMD_INFO_STRUCT]:
Offset  Size    Description     (Table 03194)
 00h    WORD    segment of old interrupt 33h handler
 02h    WORD    offset of old interrupt 33h handler
 04h    WORD    PSP of SMD
 06h    BYTE    ENABLE/DISABLE manual setting status
 07h    BYTE    ENABLE/DISABLE internal usage status
--------M-333004-----------------------------
INT 33 - Smooth Mouse Driver, PrecisePoint - RESERVED FUTURE EXPANSION
        AX = 3004h
SeeAlso: AX=3000h
--------M-333005-----------------------------
INT 33 - Smooth Mouse Driver, PrecisePoint - RESERVED FUTURE EXPANSION
        AX = 3005h
SeeAlso: AX=3000h
--------M-334F00-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - GET ???
        AX = 4F00h
Return: AX = 004Fh if supported
        BX = ???
        ES:DI -> ???
SeeAlso: AX=4F01h
--------M-334F01-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - ???
        AX = 4F01h
        ES = ???
Return: AX = 004Fh if supported
        ES:DI -> ???
SeeAlso: AX=4F00h
--------M-336F00-----------------------------
INT 33 - Hewlett Packard - HP MOUSE DRIVER INSTALLATION CHECK
        AX = 6F00h
        BX <> 4850h
Return: BX = 4850h ('HP') if mouse driver written by Hewlett Packard
SeeAlso: INT 10/AX=6F00h,INT 14/AX=6F00h,INT 16/AX=6F00h,INT 17/AX=6F00h
--------M-338800-----------------------------
INT 33 U - InfoTrack IMOUSE.COM - UNHOOK MOUSE IRQ
        AX = 8800h
        BX <> FFFFh
Note:   the code is written to expect a subfunction number in AL, but only
          function 00h has been implemented
SeeAlso: AX=8800h/BX=FFFFh
--------M-338800BXFFFF-----------------------
INT 33 U - InfoTrack IMOUSE.COM - GET ACTIVE IRQ
        AX = 8800h
        BX = FFFFh
Return: BL = number of IRQ being used by the mouse
SeeAlso: AX=8800h
--------T-33FFE6-----------------------------
INT 33 - Switch-It v3.23 - GET ??? PROGRAM
        AX = FFE6h
        CX = length of buffer
        ES:DI -> buffer for program name
Return: ES:DI buffer filled
Program: Switch-It is a task switcher supporting up to 100 programs
          simultaneously by Better Software Technology, Inc.
--------T-33FFE7-----------------------------
INT 33 - Switch-It v3.23 - GET ???
        AX = FFE7h
Return: AX = ???
--------T-33FFE8-----------------------------
INT 33 - Switch-It v3.23 - ???
        AX = FFE8h
        CX = length of name including terminating NUL
        DS:SI -> ASCIZ program pathname
--------T-33FFE9-----------------------------
INT 33 - Switch-It v3.23 - SET ???
        AX = FFE9h
        BX = ???
--------T-33FFEA-----------------------------
INT 33 - Switch-It v3.23 - SET ???
        AX = FFEAh
        BL = ???
--------T-33FFEB-----------------------------
INT 33 - Switch-It v3.23 - SET ??? FLAG
        AX = FFEBh
--------T-33FFEC-----------------------------
INT 33 - Switch-It v3.23 - SET ???
        AX = FFECh
        BL = ???
--------T-33FFED-----------------------------
INT 33 - Switch-It v3.23 - GET ???
        AX = FFEDh
Return: AX = ??? (0001h)
        BX = ???
Program: Switch-It is a task switcher supporting up to 100 programs
          simultaneously by Better Software Technology, Inc.
--------T-33FFEE-----------------------------
INT 33 - Switch-It v3.23 - GET ???
        AX = FFEEh
Return: AX = ???
--------T-33FFEF-----------------------------
INT 33 - Switch-It v3.23 - GET ???
        AX = FFEFh
Return: BX:AX -> ???
--------T-33FFF0-----------------------------
INT 33 - Switch-It v3.23 - SET ???
        AX = FFF0h
        BL = ???
--------T-33FFF1-----------------------------
INT 33 - Switch-It v3.23 - GET CONFIGURATION FILE
        AX = FFF1h
Return: BX:AX -> ASCIZ pathname of configuration file
Program: Switch-It is a task switcher supporting up to 100 programs
          simultaneously by Better Software Technology, Inc.
--------T-33FFF2-----------------------------
INT 33 - Switch-It v3.23 - SET ??? FLAG
        AX = FFF2h
Return: AL = 01h
--------T-33FFF3-----------------------------
INT 33 - Switch-It v3.23 - GET ???
        AX = FFF3h
Return: AX = ???
--------T-33FFF4-----------------------------
INT 33 - Switch-It v3.23 - SET ???
        AX = FFF4h
        BX = ???
        CX = ???
--------T-33FFF5-----------------------------
INT 33 - Switch-It v3.23 - GET ???
        AX = FFF5h
Return: AX = ???
--------T-33FFF6-----------------------------
INT 33 - Switch-It v3.23 - GET ???
        AX = FFF6h
Return: AX = ???
--------T-33FFF7-----------------------------
INT 33 - Switch-It v3.23 - GET ???
        AX = FFF7h
        BX = index of ???
Return: AX = ???
--------T-33FFF8-----------------------------
INT 33 - Switch-It v3.23 - ???
        AX = FFF8h
        BX = ???
        CX = length of program name, including terminating NUL
        DS:SI -> ASCIZ program pathname
Return: ???
Program: Switch-It is a task switcher supporting up to 100 programs
          simultaneously by Better Software Technology, Inc.
--------T-33FFF9-----------------------------
INT 33 - Switch-It v3.23 - NOP
        AX = FFF9h
--------T-33FFFA-----------------------------
INT 33 - Switch-It v3.23 - SET ???
        AX = FFFAh
        BX = index of program
SeeAlso: AX=FFFBh,AX=FFFCh
--------T-33FFFB-----------------------------
INT 33 - Switch-It v3.23 - GET ???
        AX = FFFBh
        BX = index of program
Return: AX = ??? (0000h or 0001h)
SeeAlso: AX=FFFAh,AX=FFFCh
--------T-33FFFC-----------------------------
INT 33 - Switch-It v3.23 - CLEAR ???
        AX = FFFCh
        BX = index of program
SeeAlso: AX=FFFAh,AX=FFFCh
--------T-33FFFD-----------------------------
INT 33 - Switch-It v3.23 - GET MEMORY ADDRESSES???
        AX = FFFDh
Return: AX = first available segment???
        BX = paragraph of top of conventional memory
        DX = PSP segment of SI.EXE
--------T-33FFFE-----------------------------
INT 33 - Switch-It v3.23 - INSTALLATION CHECK
        AX = FFFEh
Return: BX = ???
        DX = 5349h ("SI")
--------T-33FFFF-----------------------------
INT 33 - Switch-It v3.23 - ???
        AX = FFFFh
        BX = ???
Program: Switch-It is a task switcher supporting up to 100 programs
          simultaneously by Better Software Technology, Inc.
--------r-34---------------------------------
INT 34 - FLOATING POINT EMULATION - OPCODE D8h
Desc:   this interrupt is used to emulate floating-point instructions with
          an opcode of D8h
Note:   the floating-point emulators in Borland and Microsoft languages and
          Lahey FORTRAN use this interrupt
SeeAlso: INT 35,INT 3E
--------r-35---------------------------------
INT 35 - FLOATING POINT EMULATION - OPCODE D9h
Desc:   this interrupt is used to emulate floating-point instructions with
          an opcode of D9h
Note:   the floating-point emulators in Borland and Microsoft languages and
          Lahey FORTRAN use this interrupt
SeeAlso: INT 34,INT 36
--------r-36---------------------------------
INT 36 - FLOATING POINT EMULATION - OPCODE DAh
Desc:   this interrupt is used to emulate floating-point instructions with
          an opcode of DAh
Note:   the floating-point emulators in Borland and Microsoft languages and
          Lahey FORTRAN use this interrupt
SeeAlso: INT 35,INT 37
--------r-37---------------------------------
INT 37 - FLOATING POINT EMULATION - OPCODE DBh
Desc:   this interrupt is used to emulate floating-point instructions with
          an opcode of DBh
Note:   the floating-point emulators in Borland and Microsoft languages and
          Lahey FORTRAN use this interrupt
SeeAlso: INT 36,INT 38
--------r-38---------------------------------
INT 38 - FLOATING POINT EMULATION - OPCODE DCh
Desc:   this interrupt is used to emulate floating-point instructions with
          an opcode of DCh
Note:   the floating-point emulators in Borland and Microsoft languages and
          Lahey FORTRAN use this interrupt
SeeAlso: INT 37,INT 39
--------O-38---------------------------------
INT 38 - PC-MOS/386 v3.0 - API
Note:   this API was been moved to INT D4h sometime between versions 3.0 and
          5.01; v3.0 supported at least functions 02h,04h,0703h,10h,11h, and
          12h
SeeAlso: INT D4/AH=02h,INT D4/AH=04h,INT D4/AH=07h,INT D4/AH=10h,INT D4/AH=11h
--------r-39---------------------------------
INT 39 - FLOATING POINT EMULATION - OPCODE DDh
Desc:   this interrupt is used to emulate floating-point instructions with
          an opcode of DDh
Note:   the floating-point emulators in Borland and Microsoft languages and
          Lahey FORTRAN use this interrupt
SeeAlso: INT 38,INT 3A
--------r-3A---------------------------------
INT 3A - FLOATING POINT EMULATION - OPCODE DEh
Desc:   this interrupt is used to emulate floating-point instructions with
          an opcode of DEh
Note:   the floating-point emulators in Borland and Microsoft languages and
          Lahey FORTRAN use this interrupt
SeeAlso: INT 39,INT 3B
--------r-3B---------------------------------
INT 3B - FLOATING POINT EMULATION - OPCODE DFh
Desc:   this interrupt is used to emulate floating-point instructions with
          an opcode of DFh
Note:   the floating-point emulators in Borland and Microsoft languages and
          Lahey FORTRAN use this interrupt
SeeAlso: INT 3A,INT 3C
--------r-3C---------------------------------
INT 3C - FLOATING POINT EMULATION - INSTRUCTIONS WITH SEGMENT OVERRIDE
Notes:  the floating-point emulators in Borland and Microsoft languages and
          Lahey FORTRAN use this interrupt
        the generated code is  CD 3C xy mm ....
          where xy is a modified ESC instruction and mm is the modR/M byte.
          The xy byte appears to be encoded as
                s s 0 1 1 x x x   or    s s 0 0 0 x x x
          where "ss" specifies the segment override:
                00 -> DS:
                01 -> SS:
                10 -> CS:
                11 -> ES:
SeeAlso: INT 3B,INT 3D
--------r-3D---------------------------------
INT 3D - FLOATING POINT EMULATION - STANDALONE FWAIT
Notes:  the floating-point emulators in Borland and Microsoft languages and
          Lahey FORTRAN use this interrupt
        this vector is modified but not restored by Direct Access v4.0, and
          may be left dangling by other programs written with the same version
          of compiled BASIC
SeeAlso: INT 3C,INT 3E
--------r-3E---------------------------------
INT 3E - FLOATING POINT EMULATION - Borland LANGUAGES "SHORTCUT" CALL
Notes:  the two bytes following the INT 3E instruction are the subcode
          (see #03195) and a NOP (90h), except for subcodes DCh and DEh, where
          the second byte is a register count (01h-08h)
        this vector is modified but not restored by Direct Access v4.0, and
          may be left dangling by other programs written with the same version
          of compiled BASIC
SeeAlso: INT 3D

(Table 03195)
Values for Borland floating-point shortcut subcode:
Subcode         Function
 DCh    load 8086 stack with 8087 registers; overwrites the 10*N bytes at the
          top of the stack prior to the INT 3E with the 8087 register contents
 DEh    load 8087 registers from top of 8086 stack; ST0 is furthest from top
          of 8086 stack
 E0h    round TOS and R1 to single precision, compare, pop twice
          returns AX=8087 status word, FLAGS=8087 condition bits
 E2h    round TOS and R1 to double precision, compare, pop twice
          returns AX=8087 status word, FLAGS=8087 condition bits
        Note: buggy in TPas5.5, because it sets the 8087 precision control
          field to the undocumented value 01h; this results in actually
          rounding to single precision
 E4h    compare TOS/R1 with two POP's
          returns FLAGS=8087 condition bits
 E6h    compare TOS/R1 with POP
          returns FLAGS=8087 condition bits
 E8h    FTST (check TOS value)
          returns FLAGS=8087 condition bits
 EAh    FXAM (check TOS value)
          returns AX=8087 status word
 ECh    sine(ST0)
 EEh    cosine(ST0)
 F0h    tangent(ST0)
 F2h    arctangent(ST0)
 F4h    ST0 = ln(ST0)
 F6h    ST0 = log2(ST0)
 F8h    ST0 = log10(ST0)
 FAh    ST0 = e**ST0
 FCh    ST0 = 2**ST0
 FEh    ST0 = 10**ST0
--------r-3F---------------------------------
INT 3F - Overlay manager interrupt (Microsoft LINK.EXE, Borland TLINK VROOMM)
Notes:  INT 3F is the default, and may be overridden while linking
        this vector is modified but not restored by Direct Access v4.0, and
          may be left dangling by other programs written with the same version
          of compiled BASIC
SeeAlso: INT FE"OVERLAY"
--------r-3F---------------------------------
INT 3F - Microsoft Dynamic Link Library manager
SeeAlso: INT 21/AH=4Bh
--------B-40---------------------------------
INT 40 - DISKETTE - ROM BIOS DISKETTE HANDLER RELOCATED BY HARD DISK BIOS
SeeAlso: INT 13/AH=00h,INT 13/AH=02h,INT 47"SuperBIOS",INT 63"Adaptec"
--------h-40---------------------------------
INT 40 - Z100 - Master 8259 - Parity error or S100 error
SeeAlso: INT 41"Z100",INT FF"Z100"
--------O-40---------------------------------
INT 40 - Acorn BBC Master 512 - "OSFIND" - OPEN FILE
        AL = operation
            00h close file
            40h open file for reading
            80h open file for writing
            C0h open file for random access
        DS:BX -> CR-terminated filename
Return: AL = file handle (00h if file closed or could not be opened)
Note:   the Acorn BBC Master 512 is an 80186-based add-on board for the
          6502-based Master 128 which uses the original CPU as an I/O processor
SeeAlso: INT 41"Acorn",INT 42"Acorn",INT 43"Acorn",INT 44"Acorn",INT 4C"Acorn"
--------h-40---------------------------------
INT 40 - TI Professional PC - IRQ0
Note:   on the TI Pro, IRQ0 is connected to the same pin on the expansion bus
          that IBM connects to IRQ2
SeeAlso: INT 0A"IRQ2",INT 41"TI Professional"
--------B-41---------------------------------
INT 41 - SYSTEM DATA - HARD DISK 0 PARAMETER TABLE ADDRESS [NOT A VECTOR!]
Notes:  the default parameter table array is located at F000h:E401h in 100%
          compatible BIOSes; the pointer may be overridden by the hard disk
          controller's BIOS to support drive formats unknown to the ROM BIOS
        not used by some PS/2 models
        BIOSes which support four hard drives may store the parameter tables
          for drives 81h-83h immediately following the parameter table pointed
          at by INT 41, with a separate copy of the drive 81h table for INT 46.
          The check for such an arrangement is to test whether INT 46 points
          somewhere other than exactly 16 bytes past INT 41, and the sixteen
          bytes starting at offset 10h from INT 41 are identical to the sixteen
          bytes pointed at by INT 46
        another arrangement for BIOSes which support four IDE drives is to have
          four tables pointed at by INT 41 in the order primary master,
          primary slave, secondary master, and secondary slave, in which case
          (for example) a system with only primary master and secondary master
          will have valid tables at offsets 00h and 20h, with garbage (but
          sectors-per-track = 00h) at offsets 10h and 30h
SeeAlso: #03196,INT 13/AH=09h,INT 1E,INT 46"HARD DISK 1",INT 60"Adaptec"
SeeAlso: INT C0"AMI"

Format of fixed disk parameters:
Offset  Size    Description     (Table 03196)
 00h    WORD    number of cylinders
 02h    BYTE    number of heads
 03h    WORD    starting reduced write current cylinder (XT only, 0 for others)
 05h    WORD    starting write precompensation cylinder number
 07h    BYTE    maximum ECC burst length (XT only)
 08h    BYTE    control byte (see #03197,#03198)
 09h    BYTE    standard timeout (XT only, 0 for others)
 0Ah    BYTE    formatting timeout (XT and WD1002 only, 0 for others)
 0Bh    BYTE    timeout for checking drive (XT and WD1002 only, 0 for others)
 0Ch    WORD    cylinder number of landing zone (AT and later only)
 0Eh    BYTE    number of sectors per track (AT and later only)
 0Fh    BYTE    reserved
SeeAlso: #00273,#00277

Bitfields for XT fixed disk control byte:
Bit(s)  Description     (Table 03197)
 2-0    drive step speed
        000  3ms
        100  200ms
        101  70ms (default)
        110  3ms
        111  3ms
 5-3    unused
 6      disable ECC retries
 7      disable access retries

Bitfields for AT fixed disk control byte:
Bit(s)  Description     (Table 03198)
 0      unused
 1      reserved (0)  (disable IRQ)
 2      reserved (0)  (no reset)
 3      set if more than 8 heads
 4      always 0
 5      set if manufacturer's defect map on max cylinder+1  (AT and later only)
 6      disable ECC retries
 7      disable access retries
--------h-41---------------------------------
INT 41 - Z100 - Master 8259 - Processor Swap
SeeAlso: INT 40"Z100",INT 42"Z100"
--------h-41---------------------------------
INT 41 - TI Professional PC - IRQ1
Note:   on the TI Pro, IRQ1 is connected to the same pin on the expansion bus
          that IBM connects to IRQ3
SeeAlso: INT 0B"IRQ3",INT 40"TI Professional",INT 42"TI Professional"
--------O-41---------------------------------
INT 41 - Acorn BBC Master 512 - "OSGBPB" - MULTI-BYTE GET/PUT
        AL = function
            01h put bytes sequentially
            02h put bytes, ignoring sequential pointer
            03h get bytes sequentially
            04h get bytes, ignoring sequential pointer
            05h get media title and boot option
            06h get current device and directory
            07h get current library and device
            08h search directory
        DS:BX -> control block (see #03199)
Return: CF clear if successful
        CF set on error
        AL = 00h if operation attempted
        AL unchanged if unsupported function
SeeAlso: INT 40"Acorn",INT 42"Acorn",INT 43"Acorn"

Format of BBC Master control block:
Offset  Size    Description     (Table 03199)
 00h    BYTE    file handle
 01h    DWORD   pointer to data in either I/O processor or Tube processor
 05h    DWORD   number of bytes to be transferred
 09h    DWORD   transfer address
--------G-410000-----------------------------
INT 41 CPU - MS Windows debugging kernel - OUTPUT CHARACTER FOR USER
        AX = 0000h
        DS:DX -> character
Note:   the kernel calls this function when it wants the user program to
          output a character
SeeAlso: AX=0001h
--------G-410001-----------------------------
INT 41 CPU - MS Windows debugging kernel - INPUT CHARACTER
        AX = 0001h
Return: AL = character
Note:   the kernel calls this function when it needs to input a character
SeeAlso: AX=0000h
--------G-41000D-----------------------------
INT 41 CPU - MS Windows debugging kernel - TASK GOING OUT
        AX = 000Dh
SeeAlso: AX=000Eh
--------G-41000E-----------------------------
INT 41 CPU - MS Windows debugging kernel - TASK COMING IN
        AX = 000Eh
SeeAlso: AX=000Dh
--------G-410012-----------------------------
INT 41 CPU - MS Windows debugging kernel - "OutputDebugString"
        AX = 0012h
        DS:SI -> string (Windows 3.0)
        ES:SI -> string (Windows 3.1)
Return: nothing???
Note:   this function is called by the kernel when it wants to output a
          string through the debugger
SeeAlso: AX=0050h,INT 68/AH=47h
--------G-41004F-----------------------------
INT 41 CPU - MS Windows debugging kernel - DEBUGGER INSTALLATION CHECK
        AX = 004Fh
Return: AX = F386h if debugger is present
SeeAlso: INT 68/AX=4400h
--------G-410050-----------------------------
INT 41 P - MS Windows debugging kernel - "DefineDebugSegment"
        AX = 0050h
        BX = segment number in executable (0-based)
        CX = selector
        DX = instance handle
        SI = segment flags (0=code, 1=data)
        ES:DI -> module name of owner
Return: ???
SeeAlso: AX=0012h,AX=004Fh
--------G-410051-----------------------------
INT 41 CPU - MS Windows debugging kernel - MOVE SEGMENT
        AX = 0051h
        ???
Return: ???
SeeAlso: AX=0050h,AX=0052h
--------G-410052-----------------------------
INT 41 CPU - MS Windows debugging kernel - FREE SEGMENT
        AX = 0052h
        BX = freed selector
SeeAlso: AX=0050h,AX=0051h,AX=005Ch
--------G-410059-----------------------------
INT 41 CPU - MS Windows debugging kernel - LOAD TASK
        AX = 0059h
        ???:BX = CS:IP of new task's starting point
--------G-41005C-----------------------------
INT 41 CPU - MS Windows debugging kernel - FREE INITIAL SEGMENT
        AX = 005Ch
        BX = freed selector
Note:   called only when KERNEL starts, once for CS and once for the DS alias
          to CS
SeeAlso: AX=0052h
--------G-410060-----------------------------
INT 41 CPU - MS Windows debugging kernel -  END OF SEGMENT LOAD
        AX = 0060h
        ???
Return: ???
SeeAlso: AX=0061h
--------G-410061-----------------------------
INT 41 CPU - MS Windows debugging kernel - END OF SEGMENT DISCARD
        AX = 0061h
        ???
Return: ???
SeeAlso: AX=0060h
--------G-410062-----------------------------
INT 41 CPU - MS Windows debugging kernel - APPLICATION TERMINATING
        AX = 0062h
STACK:  BYTE    exit code
Return: ???
        STACK unchanged???
SeeAlso: AX=0064h
--------G-410063-----------------------------
INT 41 CPU - MS Windows debugging kernel - ASYNCHRONOUS STOP (Ctrl-Alt-SysReq)
        AX = 0063h
--------G-410064-----------------------------
INT 41 CPU - MS Windows debugging kernel - DLL LOADED
        AX = 0064h
        CX:BX = DLL entry point CS:IP
        SI = module handle
SeeAlso: AX=0062h,AX=0065h
--------G-410065-----------------------------
INT 41 CPU - MS Windows debugging kernel - MODULE REMOVED
        AX = 0065h
        ES = module handle
SeeAlso: AX=0064h
--------G-410066-----------------------------
INT 41 CPU - MS Windows debugging kernel - ERROR
        AX = 0066h
Note:   called by LogError()
SeeAlso: AX=0067h
--------G-410067-----------------------------
INT 41 CPU - MS Windows debugging kernel - PARAMETER ERROR
        AX = 0067h
Note:   called by LogParamError()
SeeAlso: AX=0066h
--------V-42---------------------------------
INT 42 - VIDEO - RELOCATED DEFAULT INT 10 VIDEO SERVICES (EGA,VGA)
Desc:   contains the address of the original INT 10 handler which an EGA+
          video adapter replaces with its own on-board BIOS code
SeeAlso: INT 10/AH=00h,INT 10/AH=0Eh,INT 6D"VGA"
Note:   not used by PS/2 built-in VGA or XGA
--------h-42---------------------------------
INT 42 - Z100 - Master 8259 - Timer
SeeAlso: INT 41"Z100",INT 43"Z100"
--------h-42---------------------------------
INT 42 - TI Professional PC - IRQ2
Note:   on the TI Pro, IRQ0 is connected to the same pin on the expansion bus
          that IBM connects to IRQ4
SeeAlso: INT 0C"IRQ4",INT 41"TI Professional",INT 43"TI Professional"
--------b-42---------------------------------
INT 42 - Western Digital WD1002 SuperBIOS - INT 40 CASCADE
Note:   if the second WD1002 controller in the system finds INT 40 already in
          use, it uses this vector to cascade to the first controller's BIOS
SeeAlso: INT 40"DISKETTE",INT 47"SuperBIOS"
--------O-42---------------------------------
INT 42 - Acorn BBC Master 512 - "OSBPUT" - WRITE SINGLE BYTE TO FILE
        AL = byte to be written
        BH = file handle
Return: flags destroyed
SeeAlso: INT 40"Acorn",INT 41"Acorn",INT 43"Acorn",INT 47"Acorn",INT 49"Acorn"
--------V-425F33-----------------------------
INT 42 C - Chips & Technologies '65530' BIOS - MODE SET HOOK
        AX = 5F33h
        BL = current width in characters
        BH = curent video mode
        CH = active display page
Return: nothing
Desc:   this function is called at the end of a video mode set
Note:   the OEM has the option of enabling or disabling this callout, as well
          as specifying whether the callout occurs on INT 15h or INT 42h
SeeAlso: INT 15/AX=5F31h,INT 15/AX=5F35h,INT 10/AX=5F50h,INT 15/AX=5F33h
--------V-427500-----------------------------
INT 42 U - Toshiba laptops - ???
        AX = 7500h
        BL = ??? (00h or 01h)
Return: ???
Note:   used by Toshiba utility VCHAD.EXE
SeeAlso: AX=7501h,AX=7503h
--------V-427501-----------------------------
INT 42 U - Toshiba laptop - GET ??? DATA
        AX = 7501h
        DS:DI -> data area to be filled ???
Return: area filled with data ???
Note:   used by Toshiba utility VCHAD.EXE
SeeAlso: AX=7500h,AX=7502h,AX=7503h
--------V-427502-----------------------------
INT 42 U - Toshiba laptops - SET ??? DATA
        AX = 7502h
        DS:DI -> data area ???
Return: ???
Note:   used by Toshiba utility VCHAD.EXE
SeeAlso: AX=7501h,AX=7503h
--------V-427503-----------------------------
INT 42 - Toshiba laptops - GET DISPLAY STATUS
        AX = 7503h
Return: AX = 7575h if supported
        CX = 0001h if supported
        BH = display type (00h color, 03h monochrome)
        BL = display state
            01h internal LCD display is active
            02h external VGA display is active
            03h both displays active / DeskStation display mode enabled
                (not possible on all machines)
Note:   used by VCHAD.EXE and supported by all Toshiba VGA laptops until about
          1994 (string "TOSHIBA " at F000:E010h should be checked before call)
        no longer supported by T21xx series, use INT 10/AX=5F50h instead
        INT 42 normally points to F000:F065h but may be redirected by QEMM386
SeeAlso: AX=7500h,AX=7504h,INT 10/AX=5F50h,INT 15/AH=C0h
--------V-427504-----------------------------
INT 42 U - Toshiba laptops - ???
        AX = 7504h
        BL = ???
Return: BH = ???
Note:   used by Toshiba utility VCHAD.EXE
SeeAlso: AX=7500h,AX=7503h
--------V-43---------------------------------
INT 43 - VIDEO DATA - CHARACTER TABLE (EGA,MCGA,VGA)
Desc:   points at graphics data for characters 00h-7Fh of the current font
          in 8x8 dot modes, graphics data for all characters in 8x14 and 8x16
          modes
Note:   this is not a callable vector!
SeeAlso: INT 06"no-name",INT 1F"SYSTEM DATA",INT 44"VIDEO"
--------h-43---------------------------------
INT 43 - Z100 - Master 8259 - Slave 8259 input
Note:   slave runs in special fully nested mode
SeeAlso: INT 42"Z100",INT 44"Z100"
--------h-43---------------------------------
INT 43 - TI Professional PC - IRQ3 - TIMER1 25ms INTERVAL INTERRUPT
SeeAlso: INT 0B"IRQ3",INT 42"TI Professional",INT 44"TI Professional"
SeeAlso: INT 58"TI Professional"
--------O-43---------------------------------
INT 43 - Acorn BBC Master 512 - "OSBGET" - READ SINGLE BYTE FROM FILE
        BH = file handle
Return: CF clear if successful
            AL = byte read from file
        CF set on error
SeeAlso: INT 40"Acorn",INT 41"Acorn",INT 42"Acorn",INT 46"Acorn"
--------V-44---------------------------------
INT 44 - VIDEO DATA - ROM BIOS CHARACTER FONT, CHARACTERS 00h-7Fh (PCjr)
Desc:   this vector points at graphics data for current character font
SeeAlso: INT 1F"SYSTEM DATA",INT 43"VIDEO"
--------N-44---------------------------------
INT 44 - Novell NetWare - HIGH-LEVEL LANGUAGE API
--------I-44---------------------------------
INT 44 - IBM 3270-PC High Level Language API
        DS:SI -> parameter control block
--------h-44---------------------------------
INT 44 - Z100 - Master 8259 - Serial A
SeeAlso: INT 43"Z100",INT 45"Z100"
--------h-44---------------------------------
INT 44 - TI Professional PC - IRQ4
Note:   on the TI Pro, IRQ4 is connected to the same pin on the expansion bus
          that IBM connects to IRQ5
SeeAlso: INT 0D"IRQ5",INT 43"TI Professional",INT 45"TI Professional"
--------v-44---------------------------------
INT 44 - VIRUS - "Lehigh" - ORIGINAL INT 21h VECTOR
SeeAlso: INT 32"VIRUS",INT 60"VIRUS",INT 70"VIRUS",INT 9E"VIRUS"
--------O-4400-------------------------------
INT 44 - Acorn BBC Master 512 - "OSARGS" - GET/SET FILE PARAMS FOR OPEN FILE
        AH = 00h
        AL = function
            00h get current filing system
                Return: AL = filing system (see #03200)
            01h get address of commandline tail
                Return: BX buffer filled with address of command tail in I/O
                              processor address space (use INT 4A/AL=05h to
                              retrieve)
            FFh flush all files onto secondary storage
        BX -> 4-byte data buffer
Note:   the commandline tail is terminated with a carriage return (0Dh)
SeeAlso: INT 40"Acorn",INT 45"Acorn"

(Table 03200)
Values for BBC Master filing system:
 00h    none
 01h    1200 bps cassette
 02h    300 bps cassette
 03h    ROM FS
 04h    DFS
 05h    ANFS/NFS
 06h    TFS
 08h    ADFS
--------O-44---------------------------------
INT 44 - Acorn BBC Master 512 - "OSARGS" - GET/SET FILE PARAMS FOR OPEN FILE
        AH = nonzero file handle
        AL = function
            00h get sequential pointer for file
            01h set sequential pointer for file
            02h get length of file
        BX -> 4-byte data buffer
Return: BX buffer updated if appropriate
SeeAlso: INT 40"Acorn",INT 41"Acorn",INT 44/AH=00h,INT 45"Acorn",INT 4A"Acorn"
--------h-45---------------------------------
INT 45 - Z100 - Master 8259 - Serial B
SeeAlso: INT 44"Z100",INT 46"Z100"
--------h-45---------------------------------
INT 45 - TI Professional PC - IRQ5
Note:   on the TI Pro, IRQ5 is connected to the same pin on the expansion bus
          that IBM connects to IRQ6
SeeAlso: INT 0E"IRQ6",INT 44"TI Professional",INT 46"TI Professional"
--------O-45---------------------------------
INT 45 - Acorn BBC Master 512 - "OSFILE" - READ/WRITE FILE OR DIRECTORY INFO
        AL = function
            00h save block of memory as file
            01h update directory entry for existing file
            02h set load address for existing file
            03h set execution address for existing file
            04h set attributes for existing file
            05h read directory
            06h delete file
            FFh load file
        DS:BX -> control block (see #03201)
Return: FLAGS destroyed
        AL = file type
            00h not found
            01h file found
            02h directory found
            FFh protected file
SeeAlso: INT 40"Acorn",INT 41"Acorn",INT 44"Acorn",INT 46"Acorn"

Format of BBC Master control block:
Offset  Size    Description     (Table 03201)
 00h    WORD    address of CR-terminated filename
 02h    DWORD   load address of file
 06h    DWORD   execution address of file
 0Ah    DWORD   start address of data to save
 0Eh    DWORD   end address of data to save, or file attributes
                file attributes in low byte (see #03202)
                other three bytes are filing-system specific file attributes

Bitfields for BBC Master file attributes:
Bit(s)  Description     (Table 03202)
 0      no owner read access
 1      no owner write access
 2      not executable by owner
 3      not deletable by owner
 4      no public read access
 5      no public write access
 6      not executable with public access
 7      not deletable with public access
--------B-46---------------------------------
INT 46 - SYSTEM DATA - HARD DISK 1 DRIVE PARAMETER TABLE ADDRESS [NOT A VECTOR!]
Note:   not used by some PS/2 models
SeeAlso: INT 13/AH=09h,INT 41"HARD DISK 0",INT 60"Adaptec",INT C0"AMI"
--------h-46---------------------------------
INT 46 - Z100 - Master 8259 - Keyboard, Retrace, and Light Pen
SeeAlso: INT 45"Z100",INT 47"Z100"
--------h-46---------------------------------
INT 46 - TI Professional PC - IRQ6 - FLOPPY DISK CONTROLLER
Note:   on the TI Pro, IRQ6 is connected to the same pin on the expansion bus
          that IBM connects to IRQ7
SeeAlso: INT 0F"IRQ7",INT 45"TI Professional",INT 47"TI Professional"
--------O-46---------------------------------
INT 46 - Acorn BBC Master 512 - "OSRDCH" - GET CHARACTER FROM CUR INPUT STREAM
Return: CF clear if successful
            AL = character read
        CF set on error
            AL = error code
SeeAlso: INT 40"Acorn",INT 43"Acorn",INT 47"Acorn",INT 49"Acorn"
--------h-47---------------------------------
INT 47 - Z100 - Master 8259 - Printer
SeeAlso: INT 46"Z100",INT 48"Z100"
--------h-47---------------------------------
INT 47 - TI Professional PC - IRQ7 - KEYBOARD USART
SeeAlso: INT 09"IRQ1",INT 46"TI Professional"
--------O-47---------------------------------
INT 47 - Acorn BBC Master 512 - "OSWRCH" - WRITE CHARACTER TO CUR OUTPUT STREAM
        AL = character to be written
Return: FLAGS destroyed
SeeAlso: INT 40"Acorn",INT 46"Acorn",INT 49"Acorn"
--------b-47---------------------------------
INT 47 - Western Digital WD1002-27X SuperBIOS - INT 40 CASCADE
Desc:   used by the second WD1002-27X controller to cascade to the first
          controller's INT 40
SeeAlso: INT 40"DISKETTE",INT 42"SuperBIOS",INT 48"SuperBIOS"
----------478000-----------------------------
INT 47 - SQL Base - DATABASE ENGINE API
        AX = 8000h
        DS:BX -> parameter block, first word is function number (see #03203)
Program: SQL Base is a network-oriented database engine by Gupta Technologies
SeeAlso: AX=8001h

(Table 03203)
Values for SQL Base function number:
 01h    "SQLFINI" initalialize application's use of the database
 02h    "SQLFDON" application is done using the database
 03h    "SQLFCON" connect to a cursor/database
 04h    "SQLFDIS" disconnect from a cursor/database
 05h    "SQLFCOM" compile a SQL command
 06h    "SQLFEXE" execute a SQL command
 07h    "SQLFCEX" compile and execute a SQL command
 08h    "SQLFCMT" commit a transaction to the database
 09h    "SQLFDES" describe the items of a SELECT statement
 0Ah    "SQLFGFI" get fetch information
 0Bh    "SQLFFBK" fetch previous result row from SELECT statement
 0Ch    "SQLFFET" fetch next result row from SELECT statement
 0Dh    "SQLFEFB" enable fetch backwards
 0Eh    "SQLFPRS" position in result set
 0Fh    "SQLFURS" undo result set
 10h    "SQLFNBV" get number of bind variables
 11h    "SQLFBND" bind data variables
 12h    "SQLFBNN" bind numerics
 13h    "SQLFBLN" bind long number
 14h    "SQLFBLD" bind long data variables
 15h    "SQLFSRS" start restriction set processing
 16h    "SQLFRRS" restart restriction set processing
 17h    "SQLFCRS" close restriction set
 18h    "SQLFDRS" drop restriction set
 19h    "SQLFARF" apply Roll Forward journal
 1Ah    "SQLFERF" end Roll Forward journal
 1Bh    "SQLFSRF" start Roll Forward journal
 1Ch    "SQLFSTO" store a compiled SQL command
 1Dh    "SQLFRET" retrieve a compiled SQL command
 1Eh    "SQLFDST" drop a stored command
 1Fh    "SQLFCTY" get command type
 20h    "SQLFEPO" get error position
 21h    "SQLFGNR" get number of rows
 22h    "SQLFNSI" get number of select items
 23h    "SQLFRBF" get Roll Back flag
 24h    "SQLFRCD" get return code
 25h    "SQLFROW" get number of ROWs
 26h    "SQLFSCN" set cursor name
 27h    "SQLFSIL" set isolation level
 28h    "SQLFSLP" set log parameters
 29h    "SQLFSSB" set select buffer
 2Ah    "SQLFSSS" set sort space
 2Bh    "SQLFRLO" read long
 2Ch    "SQLFWLO" write long
 2Dh    "SQLFLSK" long seek
 2Eh    "SQLFGLS" get long size
 2Fh    "SQLFELO" end long operation
 30h    "SQLFRBK" roll back a transaction from the database
 31h    "SQLFERR" error message
 32h    "SQLFCPY" copy
 33h    "SQLFR01" reserved
 34h    "SQLFSYS" system
 35h    "SQLFSTA" statistics
 36h    "SQLFR02" reserved
 37h    "SQLFXAD" extra add
 38h    "SQLFXCN" extra character to number
 39h    "SQLFXDA" extra date add
 3Ah    "SQLFXDP" extra date picture
 3Bh    "SQLFXDV" extra divide
 3Ch    "SQLFXML" extra multiply
 3Dh    "SQLFXNP" extra number picture
 3Eh    "SQLFXPD" extra picture date
 3Fh    "SQLFXSB" extra subtract
 40h    "SQLFINS" install database
 41h    "SQLFDIN" deinstall database
 42h    "SQLFDIR" directory of databases
 43h    "SQLFTIO" timeout
 44h    "SQLFFQN" get fully qualified column name
 45h    "SQLFEXP" explain execution plan
 46h    "SQLFFER" get full error
 47h    "SQLFBKP" begin online backup
 48h    "SQLFRDC" read backup data chunk
 49h    "SQLFEBK" end backup
 4Ah    "SQLFRES" begin restore from backup
 4Bh    "SQLFWDC" write backup data chunk for restore
 4Ch    "SQLFRRD" recover restored database to consistent state
 4Dh    "SQLFERS" end restore
 4Eh    "SQLFNRR" return number of result set rows
 4Fh    "SQLFSTR" start restriction mode
 50h    "SQLFSPR" stop restriction mode
 51h    "SQLFCNC" connect 2
 52h    "SQLFCNR" connect with no recovery
 53h    "SQLFOMS" set output message size
 54h    "SQLFIMS" set input message size
 55h    "SQLFSCP" set cache pages
 56h    "SQLFDSC" describe items of a SELECT statement (external)
 57h    "SQLFLAB" get label info for items in SELECT statement
 58h    "SQLFCBV" clear bind variables
 59h    "SQLFGET" get database information
 5Ah    "SQLFSET" set database information
 5Bh    "SQLFTEC" translate error code
----------478001-----------------------------
INT 47 - SQL Base - GET VERSION NUMBER
        AX = 8001h
Return: ???
Program: SQL Base is a network-oriented database engine by Gupta Technologies
SeeAlso: AX=8000h
--------B-48---------------------------------
INT 48 - KEYBOARD - CORDLESS KEYBOARD TRANSLATION (PCjr)
SeeAlso: INT 49"PCjr"
--------h-48---------------------------------
INT 48 - Z100 - Slave 8259 - S100 vectored line 0
SeeAlso: INT 47"Z100",INT 49"Z100"
--------N-48---------------------------------
INT 48 - Watstar PC Network data pointer 1
SeeAlso: INT 49"Watstar"
--------O-48---------------------------------
INT 48 - Acorn BBC Master 512 - "OSNEWL" - SEND NEWLINE TO OUTPUT STREAM
Return: FLAGS destroyed
Note:   writes a carriage return (0Dh) followed by a linefeed (0Ah)
SeeAlso: INT 40"Acorn",INT 47"Acorn",INT 49"Acorn"
--------b-48---------------------------------
INT 48 - Western Digital WD1002-27X SuperBIOS - DRIVE DATA (NOT A VECTOR!)
Note:   the second WD1002-27X controller in a system uses the low byte to
          store the number of drives controlled by the second controller,
          and the high word for temporary storage during track recalculation;
          the first controller uses offsets 74h-77h in the BIOS data area
          (refer to MEMORY.LST) to store data
SeeAlso: INT 47"SuperBIOS"
--------V-48---------------------------------
INT 48 U - Compaq UILIB.EXE - API
        AX = function (see #03204)
        BX = call type (0002h) (see #03207)
        ???
Return: ???
Note:   returns AX=FFFFh if 1000h<=AX<=2000h and AX is not one of the functions
          listed below
SeeAlso: AX=1A70h

(Table 03204)
Values for valid UILIB function number:
 1000h  1160h   12D0h   1430h   1570h   1680h   17F0h   1920h   1A90h
 1010h  1170h   12E0h   1440h   1578h   1690h   1800h   1930h   1AA0h
 1020h  1180h   12F0h   1450h   1580h   16A0h   1810h   1940h
 1030h  1190h   1300h   1460h   1590h   16B0h   1820h   1950h
 1040h  11A0h   1310h   1470h   1594h   16C0h   1830h   1960h
 1050h  11B0h   1320h   1480h   1598h   16D0h   1840h   1970h
 1060h  11C0h   1330h   1490h   15A0h   16E0h   1848h   1980h
 1070h  11D0h   1340h   14A0h   15B0h   16F0h   1850h   1990h
 1080h  11E0h   1350h   14B0h   15C0h   1700h   1860h   19A0h
 1090h  11F0h   1360h   14B8h   15D0h   1710h   1870h   19B0h
 1095h  1200h   1370h   14BBh   15D4h   1720h   1878h   19C0h
 1098h  1210h   1380h   14C0h   15D8h   1730h   1880h   19D0h
 10A0h  1220h   1390h   14D0h   15E0h   1735h   1890h   19E0h
 10C0h  1230h   13A0h   14E0h   15F0h   1740h   1898h   19F0h
 10D0h  1240h   13B0h   14F0h   1600h   1750h   18A0h   1A00h
 10E0h  1250h   13B8h   1500h   1610h   1770h   18B0h   1A10h
 10F0h  1260h   13C0h   1508h   1620h   1780h   18C0h   1A20h
 1100h  1270h   13D0h   1510h   1630h   1790h   18D0h   1A30h
 1110h  1280h   13E0h   1520h   1640h   17A0h   18E0h   1A40h
 1120h  1290h   13F0h   1530h   1650h   17B0h   18F0h   1A50h
 1130h  12A0h   1400h   1540h   1660h   17C0h   1900h   1A60h
 1140h  12B0h   1410h   1550h   1664h   17D0h   1909h   1A70h
 1150h  12C0h   1420h   1560h   1670h   17E0h   1910h   1A80h
--------b-4800-------------------------------
INT 48 - TI Professional PC - SPEAKER DEVICE - SOUND SPEAKER
        AH = 00h
        AL = number of 25ms ticks sound should last
Return: nothing
Desc:   sound the speaker at the current frequency setting (see AH=02h) for
          the indicated duration
Notes:  this function returns immediately; the sound is terminated by the
          timer interrupt handler
        if a new sound is requested while one is already in progress, the
          previous sound is terminated immediately and the new sound takes
          its place
SeeAlso: AH=01h,AH=02h,AH=03h,AH=04h,AH=06h,AH=08h,AH=0Ah,AH=0Bh
SeeAlso: INT 40"TI Professional",INT 49/AH=01h"TI"
SeeAlso: INT 4A/AH=00h"TI",INT 4C"TI Professional",INT 4D/AH=00h
--------b-4801-------------------------------
INT 48 - TI Professional PC - SPEAKER DEVICE - CHECK SPEAKER STATUS
        AH = 01h
Return: ZF clear if speaker is currently on
        ZF set if speaker is currently off
SeeAlso: AH=00h,AH=02h,AH=03h,AH=04h,AH=06h,AH=08h,AH=0Ah,AH=0Bh
--------b-4802-------------------------------
INT 48 - TI Professional PC - SPEAKER DEVICE - SET SPEAKER FREQUENCY
        AH = 02h
        CX = frequency divisor (freq = 1250000 / CX)
Return: nothing
SeeAlso: AH=00h,AH=01h,AH=03h,AH=04h,AH=06h,AH=08h,AH=0Ah,AH=0Bh
--------b-4803-------------------------------
INT 48 - TI Professional PC - SPEAKER DEVICE - TURN ON SPEAKER
        AH = 03h
Return: nothing
Desc:   turn on the speaker at the current frequency, leaving it on until
          explicitly turned off with AH=04h or the end of a subsequent
          AH=00h
SeeAlso: AH=00h,AH=01h,AH=02h,AH=04h,AH=06h,AH=08h,AH=0Ah,AH=0Bh
--------b-4804-------------------------------
INT 48 - TI Professional PC - SPEAKER DEVICE - TURN OFF SPEAKER
        AH = 04h
Return: nothing
SeeAlso: AH=00h,AH=01h,AH=02h,AH=03h,AH=04h,AH=06h,AH=08h,AH=0Ah,AH=0Bh
--------b-4805-------------------------------
INT 48 - TI Professional PC - SPEAKER DEVICE - DELAY
        AH = 05h
        CX = desired delay in milliseconds
Return: after delay expires
Note:   the delay is only approximate, and may be longer than requested
SeeAlso: AH=00h,AH=01h,AH=02h,AH=03h,AH=04h,AH=06h,AH=08h,AH=0Ah,AH=0Bh
--------b-4806-------------------------------
INT 48 - TI Professional PC - CALCULATE CRC
        AH = 06h
        ES:BX -> memory block for which to calculate CRC
        BP = size of block in bytes
Return: DX = CRC for block
        ZF set if DX = 0000h
Note:   if the CRC of a memory block is appended to the block, then the CRC
          of the block plus CRC should equal 0000h
SeeAlso: AH=00h,AH=01h,AH=02h,AH=03h,AH=04h,AH=06h,AH=08h,AH=0Ah,AH=0Bh
--------b-4807-------------------------------
INT 48 - TI Professional PC - PRINT ROM MESSAGE
        AH = 07h
        SI = offset of ASCIZ message string within segment F400h
Return: nothing
SeeAlso: AH=00h,AH=01h,AH=02h,AH=03h,AH=04h,AH=06h,AH=08h,AH=0Ah,AH=0Bh
--------b-4808-------------------------------
INT 48 - TI Professional PC - DISPLAY SYSTEM ERROR MESSAGE
        AH = 08h
        BX = error number
Return: nothing
Desc:   displays the error message " ** System Error ** - xxxx" where xxxx is
          the hexadecimal value in BX
SeeAlso: AH=00h,AH=01h,AH=02h,AH=03h,AH=04h,AH=06h,AH=08h,AH=0Ah,AH=0Bh
--------b-4809-------------------------------
INT 48 - TI Professional PC - GET SYSTEM CONFIGURATION DATA
        AH = 09h
Return: ES:BX -> system configuration word (see #03227)
SeeAlso: AH=00h,AH=01h,AH=02h,AH=03h,AH=04h,AH=06h,AH=08h,AH=0Ah,AH=0Bh
--------b-480A-------------------------------
INT 48 - TI Professional PC - GET EXTRA SYSTEM CONFIGURATION INFO ADDRESS
        AH = 0Ah
Return: ES:BX -> configuration information (see #03205)
SeeAlso: AH=00h,AH=01h,AH=02h,AH=03h,AH=04h,AH=06h,AH=08h,AH=0Bh

Format of TI Professional PC extra system configuration information:
Offset  Size    Description     (Table 03205)
 -3     WORD    memory size in paragraphs
 00h    BYTE    drive type byte (see #03206)
 01h    WORD    extra system configuration word 1
                bit 0: 8087 is present
                bits 15-1: reserved (0)
 03h    WORD    extra system configuration word 2
                bits 15-0: reserved (0)

Bitfields for TI Professional PC drive type byte:
Bit(s)  Description     (Table 03206)
 0      drive A is double-sided
 1      drive A has 80 tracks instead of 40
 2      drive B is double-sided
 3      drive B has 80 tracks instead of 40
 4      drive C is double-sided
 5      drive C has 80 tracks instead of 40
 6      drive D is double-sided
 7      drive D has 80 tracks instead of 40
Note:   the type for drive A is determined by motherboard switches; the
          remaining drives' types are set from a table in IO.SYS
SeeAlso: #03205
--------b-480B-------------------------------
INT 48 - TI Professional PC - GET EXTRA SYSTEM CONFIGURATION INFORMATION
        AH = 0Bh
Return: AL = drive type byte (see #03206)
        BX = extra system configuration word 1 (see #03205)
        CX = extra system configuration word 2 (see #03205)
        AH destroyed
SeeAlso: AH=00h,AH=01h,AH=02h,AH=03h,AH=04h,AH=06h,AH=08h,AH=0Ah
--------V-481A70-----------------------------
INT 48 U - Compaq UILIB.EXE - INSTALLATION CHECK
        AX = 1A70h
        BX = call type (see #03207)
Return: CX = 5649h ('VI') if installed
        DX = 4557h ('EW') if installed
            AX = version??? (0106h)

(Table 03207)
Values for UILIB call type:
 0000h  near
 0001h  far
 0002h  INT (only valid call type when using INT 48)
 0003h  near
--------B-49---------------------------------
INT 49 - SYSTEM DATA - NON-KEYBOARD SCAN-CODE TRANSLATION TABLE (PCjr)
SeeAlso: #03208,INT 48"PCjr"

Format of PCjr scan-code translation table:
Offset  Size    Description     (Table 03208)
 00h    BYTE    number of non-keyboard scancodes in the table
 01h  N WORDs   high byte 00h (NUL) byte scancode with low order byte
                  representing the scancode mapped values relative to their
                  input values within the range of 56h through 7Eh
--------h-49---------------------------------
INT 49 - Z100 - Slave 8259 - S100 vectored line 1
SeeAlso: INT 48"Z100",INT 4A"Z100"
--------N-49---------------------------------
INT 49 - Watstar PC Network data pointer 2
SeeAlso: INT 48"Watstar"
--------O-49---------------------------------
INT 49 - Acorn BBC Master 512 - "OSASCI" - WRITE CHARACTER TO CUR OUTPUT STREAM
        AL = character to be written
Return: FLAGS destroyed
Note:   converts carriage return (0Dh) into CRLF sequence (0Dh 0Ah)
SeeAlso: INT 40"Acorn",INT 46"Acorn",INT 47"Acorn",INT 48"Acorn"
--------b-49---------------------------------
INT 49 - Tandy 2000 - BOOTSTRAP LOADER
Note:   this interrupt is identical to INT 19
SeeAlso: INT 19,INT 4A"Tandy 2000",INT 4C"Tandy 2000",INT 51"Tandy 2000"
--------a-490001-----------------------------
INT 49 - MAGic v1.16+ - TURN ON MAGNIFICATION
        AX = 0001h
Return: AX = status (see #03209)
        BX,CX,DX destroyed
Program: MAGic (MAGnification In Color) is a TSR by Microsystems Software, Inc.
          providing 2x2 text and graphics magnification on VGA, XGA, and SVGA
Note:   INT 49 is the default, but may be overridden on the commandline.  The
          actual interrupt in use may be found by searching for the signature
          "MAGic" or "xMAGic" (for the deluxe version) immediately preceding
          the interrupt handler (this is also the installation check).  MAGic
          uses CodeRunneR, which places the signature "RT" at offset 0000h in
          the interrupt handler's segment, followed by MAGic's TSR ID of
          "VMAG".
SeeAlso: AX=0002h,AX=0003h,AX=0004h,AX=0008h
Index:  installation check;MAGic

(Table 03209)
Values for MAGic status:
 0000h  cannot magnify current video mode
 0002h  magnified (text mode)
 0003h  magnified (graphics mode)
 FFFDh  function works only in magnified mode
 FFFFh  MAGic busy, retry later
--------a-490002-----------------------------
INT 49 - MAGic v1.16+ - TURN OFF MAGNIFICATION
        AX = 0002h
Return: AX = status (see #03209)
        BX,CX,DX destroyed
SeeAlso: AX=0001h
--------a-490003-----------------------------
INT 49 - MAGic v1.16+ - SHIFT MAGNIFIED WINDOW TO INCLUDE SPECIFIED LOCATION
        AX = 0003h
        BX = vertical position (character row [text] or pixel row [graphics])
        DX = horizontal position (char column [text] or 8-pixel units [gr])
Return: AX = status
            0000h successful
            FFFFh MAGic busy, retry later
        BX,CX,DX destroyed
Note:   window is not moved if the position is inside the current window
SeeAlso: AX=0001h,AX=0004h,AX=0005h
--------a-490004-----------------------------
INT 49 - MAGic v1.16+ - REPOSITION MAGNIFIED WINDOW
        AX = 0004h
        BX = vertical position of upper left corner
        DX = horizontal position
Return: AX = status (see AX=0003h)
        BX,CX,DX destroyed
SeeAlso: AX=0001h,AX=0003h,AX=0005h
--------a-490005-----------------------------
INT 49 - MAGic v1.16+ - GET POSITION OF MAGNIFIED WINDOW
        AX = 0005h
Return: AX = status
            0000h successful
                BX = vertical position (char row or pixel row)
                DX = horizontal position (char column or 8-pixel units)
            FFFFh MAGic busy, retry later
                BX,DX destroyed
        CX destroyed
SeeAlso: AX=0001h,AX=0003h,AX=0004h,AX=0006h,AX=0007h
--------a-490006-----------------------------
INT 49 - MAGic v1.16+ - GET SIZE OF FULL SCREEN
        AX = 0006h
Return: AX = status
            0000h successful
                BX = vertical size (char rows or pixel rows)
                DX = horizontal size (char cols or 8-pixel units)
            FFFFh MAGic busy, retry later
                BX,DX destroyed
        CX destroyed
SeeAlso: AX=0001h,AX=0005h,AX=0007h
--------a-490007-----------------------------
INT 49 - MAGic v1.16+ - GET SIZE OF MAGNIFICATION WINDOW
        AX = 0007h
Return: AX = status
            0000h successful
                BX = vertical size (char rows or pixel rows)
                DX = horizontal size (char cols or 8-pixel units)
            FFFEh invalid function
            FFFFh MAGic busy, retry later
                BX,DX destroyed
        CX destroyed
BUG:    in v1.16 and v1.17, this function is not recognized as valid, but
          AX=0000h is accepted and will branch into hyperspace
SeeAlso: AX=0001h,AX=0006h
--------a-490008-----------------------------
INT 49 - MAGic v1.23+ - SET TEXT MODE MAGNIFICATION SIZE
        AX = 0008h
        BX = scaling factor (01h=1.4 times, 02h, 04h, 06h, 08h, 09h=12 times)
Return: AX = status
            0000h successful
            FFFBh scaling factor only available in MAGic Deluxe
            FFFCh already in magnified state, can't set size
Notes:  this call specifies the amount a subsequent call to AX=0001h should
          magnify the display
        scaling factors greater than 2 are only available in MAGic Deluxe
SeeAlso: AX=0001h
--------V-4901-------------------------------
INT 49 - TI Professional PC - CRT - SET CURSOR SIZE AND TYPE
        AH = 01h
        CH = cursor start line (bits 3-0) and status (bits 6-5)
            status bits:
                00 non-blinking cursor
                01 no cursor
                10 fast-blinking cursor
                11 slow-blinking cursor
        CL = cursor end line
Return: nothing
Note:   AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
SeeAlso: AH=02h,AH=03h,INT 40"TI Professional",INT 48/AH=00h"TI Professional"
SeeAlso: INT 4A/AH=00h"TI",INT 4B"TI Professional",INT 4D/AH=00h
SeeAlso: INT 57"TI Professional"
--------V-4902-------------------------------
INT 49 - TI Professional PC - CRT - SET CURSOR POSITION
        AH = 02h
        DH = column
        DL = row
Return: DX destroyed
Notes:  AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
        the TI swaps the row and column compared to the equivalent IBM call
SeeAlso: AH=01h,AH=03h
--------V-4903-------------------------------
INT 49 - TI Professional PC - CRT - GET CURSOR POSTION AND TYPE
        AH = 03h
Return: CH = cursor start and status (see AH=01h)
        CL = cursor end line
        DH = cursor column
        DL = cursor row
Note:   AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
SeeAlso: AH=01h,AH=02h
--------V-4906-------------------------------
INT 49 - TI Professional PC - CRT - SCROLL UP/COPY WINDOW
        AH = 06h
        AL = source blanking
            00h blank source region (move/scroll)
            nonzero do not blank source region (copy)
        DH,DL = source start column,row
        BH,BL = destination start column,row
        CH = width of region to move/copy
        CL = height of region to move/copy
Return: nothing
Notes:  AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
        the specified region may be wider than the screen, but reliable
          operation then requires that the height be exactly one row
SeeAlso: AH=01h,AH=02h,AH=07h,AH=13h,AH=14h
--------V-4907-------------------------------
INT 49 - TI Professional PC - CRT - SCROLL DOWN/COPY WINDOW
        AH = 07h
        AL = source blanking
            00h blank source region (move/scroll)
            nonzero do not blank source region (copy)
        DH,DL = source start column,row
        BH,BL = destination start column,row
        CH = width of region to move/copy
        CL = height of region to move/copy
Return: nothing
Note:   AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
SeeAlso: AH=01h,AH=02h,AH=06h,AH=13h,AH=14h
--------V-4908-------------------------------
INT 49 - TI Professional PC - CRT - GET CHARACTER AND ATTRIBUTE AT POSITION
        AH = 08h
Return: AL = character at current cursor position
        AH = attribute
Note:   AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
SeeAlso: AH=01h,AH=09h,AH=0Ah,AH=0Eh,INT 10/AH=08h
--------V-4909-------------------------------
INT 49 - TI Professional PC - CRT - WRITE CHARACTER(S) WITH ATTRIBUTE
        AH = 09h
        AL = character to write
        BL = attribute to use (becomes new current attribute)
        CX = number of times to write character
Return: nothing
Desc:   write CX copies of the character in AL beginning at the current cursor
          position
Note:   AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
SeeAlso: AH=01h,AH=08h,AH=0Ah,AH=0Eh,INT 10/AH=09h
--------V-490A-------------------------------
INT 49 - TI Professional PC - CRT - WRITE CHARACTER(S) WITH CURRENT ATTRIBUTE
        AH = 0Ah
        AL = character to write
        CX = number of times to write character
Return: nothing
Desc:   write CX copies of the character in AL beginning at the current cursor
          position
Note:   AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
SeeAlso: AH=01h,AH=02h,AH=08h,AH=09h,AH=0Eh,INT 10/AH=0Ah
--------V-490E-------------------------------
INT 49 - TI Professional PC - CRT - TTY OUTPUT
        AH = 0Eh
        AL = character to write
Return: nothing
Desc:   write the character in AL at the current cursor position, advancing
          the cursor, and interpreting CR, LF, TAB, and BEL characters
Note:   AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
SeeAlso: AH=01h,AH=02h,AH=08h,AH=09h,AH=0Ah,INT 10/AH=0Eh
--------V-4910-------------------------------
INT 49 - TI Professional PC - CRT - WRITE BLOCK OF CHARACTERS WITH ATTRIBUTE
        AH = 10h
        AL = attribute (becomes new current attribute)
        DX:BX -> string of characters to write
        CX = length of string
Return: nothing
Note:   AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
BUG:    CX must not be 0000h on entry, or the system will crash
SeeAlso: AH=01h,AH=02h,AH=09h,AH=0Eh,AH=11h
--------V-4911-------------------------------
INT 49 - TI Professional PC - CRT - WRITE BLOCK OF CHARACTERS WITH CURR ATTRIB
        AH = 11h
        DX:BX -> string of characters to write
        CX = length of string
Return: nothing
Note:   AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
BUG:    CX must not be 0000h on entry, or the system will crash
SeeAlso: AH=01h,AH=02h,AH=09h,AH=0Eh,AH=10h
--------V-4912-------------------------------
INT 49 - TI Professional PC - CRT - FILL ENTIRE SCREEN WITH ATTRIBUTE
        AH = 12h
        AL = attribute (see #03210)
Return: nothing
Note:   AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
SeeAlso: AH=01h,AH=02h

Bitfields for TI Professional PC screen attribute:
Bit(s)  Description     (Table 03210)
 7      alternate character set (requires user-supplied ROM)
 6      blink
 5      underline
 4      reverse video
 3      character enable
 2      green (color) or 58% intensity (gray-scale)
 1      red (color)  or 27.5% intensity
 0      blue (color) or 14.5% intensity
--------V-4913-------------------------------
INT 49 - TI Professional PC - CRT - CLEAR ENTIRE TEXT SCREEN AND HOME CURSOR
        AH = 13h
Return: nothing
Note:   AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
SeeAlso: AH=01h,AH=02h,AH=06h,AH=14h
--------V-4914-------------------------------
INT 49 - TI Professional PC - CRT - CLEAR ENTIRE GRAPHICS SCREEN
        AH = 14h
Return: nothing
Note:   AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
SeeAlso: AH=01h,AH=02h,AH=06h,AH=13h
--------V-4915-------------------------------
INT 49 - TI Professional PC - CRT - SET PROTECTED STATUS AREA
        AH = 15h
        CL = row at which to start status area, or 00h to cancel
        CH = 00h
Return: nothing
Desc:   set a protected area of the screen which will not be affected by TTY
          writes or the scrolls they may generate
Notes:  AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
        the current cursor position must be above the status area in order to
          set the protected area
SeeAlso: AH=01h,AH=02h
--------V-4916-------------------------------
INT 49 - TI Professional PC - CRT - SET ATTRIBUTE LATCH
        AH = 16h
        BL = new attribute (see #03210)
Return: nothing
Note:   AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
SeeAlso: AH=01h,AH=02h
--------V-4917-------------------------------
INT 49 - TI Professional PC - CRT - GET START-OF-DISPLAY POINTER
        AH = 17h
Return: DX = current offset at which display starts
Note:   AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
SeeAlso: AH=01h,AH=02h,INT 10/AH=FEh
--------V-4918-------------------------------
INT 49 - TI Professional PC - CRT - PRINT TTY STRING
        AH = 18h
        CS:BX -> counted string (count byte with length followed by string)
Return: nothing
Notes:  AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
        the string must be located in the caller's code segment; any TSRs
          which want to hook INT 49 must check for this function and emulate
          it, because the BIOS retrieves the caller's CS from the stack
SeeAlso: AH=01h,AH=02h,AH=0Eh
--------B-4A---------------------------------
INT 4A C - SYSTEM - USER ALARM HANDLER
Desc:   This interrupt is invoked by the BIOS when a real-time clock alarm
          occurs; an application may use it to perform an action at a
          predetermined time.
Note:   this interrupt is called from within a hardware interrupt handler,
          so all usual precautions against reentering DOS must be taken
SeeAlso: INT 1A/AH=06h
--------h-4A---------------------------------
INT 4A - Z100 - Slave 8259 - S100 vectored line 2
SeeAlso: INT 49"Z100",INT 4B"Z100"
--------b-4A---------------------------------
INT 4A - Tandy 2000 - PRINT SCREEN
Note:   this interrupt is identical to INT 05
SeeAlso: INT 05"PRINT SCREEN"
--------O-4A---------------------------------
INT 4A - Acorn BBC Master 512 - "OSWORD" - MISC FUNCTIONS USING CONTROL BLOCK
        AL = function code
            FAh transfer data between 80186 and 65C12 I/O processor
        DS:BX -> control block (see #03211)
Return: FLAGS destroyed
        control block updated
Note:   there are more functions than are listed here, but details are not
          available
SeeAlso: INT 40"Acorn",INT 4B"Acorn",INT 4C"Acorn"

Format of BBC Master control block for function FAh:
Offset  Size    Description     (Table 03211)
 00h    BYTE    number of parameters sent to I/O processor (0Dh,0Eh)
 01h    BYTE    number of parameters read from I/O processor (01h)
 02h    DWORD   I/O processor address
 06h    DWORD   80186 segment:offset address
 0Ah    WORD    number of bytes to transfer
 0Ch    BYTE    operation type
                00h write to 65C12 at 24 us/byte
                01h read from 65C12 at 24 us/byte
                02h write to 65C12 at 26 us/word
                03h read from 65C12 at 26 us/word
                04h write to 65C12 at 10 us/byte using 256-byte blocks
                05h read from 65C12 at 10 us/byte using 256-byte blocks
 0Dh    BYTE    65C12 memory access control (only used if offset 00h = 0Eh)
                (see #03212)

Bitfields for 65C12 memory access control:
Bit(s)  Description     (Table 03212)
 7      unused
 6      always use main screen memory if I/O addr 3000h-7FFFh (overrides bit 5)
 5      use shadow screen memory if screen address specified
 4      use current ROM rather than ROM selected by bits 3-0 (only if I/O
          address between 8000h and BFFFh)
 3-0    paged ROM number
--------b-4A00-------------------------------
INT 4A - TI Professional PC - KEYBOARD - GET KEYPRESS
        AH = 00h
Return: AX = keystroke (AH=00h for ASCII keys -- no scan code)
SeeAlso: AH=01h,AH=02h,AH=03h,AH=04h,AH=05h,INT 16/AH=00h
SeeAlso: INT 47"TI Professional",INT 48/AH=00h"TI Professional"
SeeAlso: INT 49/AH=01h"TI",INT 4C"TI Professional",INT 4D/AH=00h
SeeAlso: INT 5B"TI Professional"
--------b-4A01-------------------------------
INT 4A - TI Professional PC - KEYBOARD - GET KEYBOARD STATUS
        AH = 01h
Return: ZF set if no keystroke available
        ZF clear if keystrokes in buffer
            AX = next keystroke (AH=00h for ASCII keys -- no scan code)
SeeAlso: AH=00h,AH=02h,AH=03h,AH=04h,AH=05h,INT 16/AH=01h
--------b-4A02-------------------------------
INT 4A - TI Professional PC - KEYBOARD - GET KEYBOARD MODE
        AH = 02h
Return: AL = shift states (see #03213)
SeeAlso: AH=00h,AH=02h,AH=03h,AH=04h,AH=05h,INT 16/AH=02h

Bitfields for TI Professional PC keyboard shift states:
Bit(s)  Description     (Table 03213)
 0      Ctrl key pressed
 1      Alt key pressed
 2      either Shift key pressed
 3-6    0
 7      CapsLock is ON
--------b-4A03-------------------------------
INT 4A - TI Professional PC - KEYBOARD - FLUSH KEYBOARD BUFFER
        AH = 03h
Return: nothing
SeeAlso: AH=00h,AH=02h,AH=03h,AH=04h,AH=05h
--------b-4A04-------------------------------
INT 4A - TI Professional PC - KEYBOARD - SEND COMMAND TO KEYBOARD
        AH = 04h
        AL = command
            00h reset to default states
            01h enable auto-repeat (default)
            02h disable auto-repeat
            03h lock keyboard
            04h unlock keyboard (default)
            05h enable keyclick (requires hardware modification to work)
            06h disable keyclick (default)
Return: nothing
SeeAlso: AH=00h,AH=02h,AH=03h,AH=04h,AH=05h
--------b-4A05-------------------------------
INT 4A - TI Professional PC - KEYBOARD - INSERT CHARACTER INTO KEYBOARD BUFFER
        AH = 05h
        BX = character code (BH=00h if ASCII character, BL=00h/BH nonzero for
              extended codes) (see #03214)
Return: ZF set if keyboard buffer was already full
        ZF clear if keystroke inserted into buffer
SeeAlso: AH=00h,AH=02h,AH=03h,AH=04h,AH=05h,INT 5B"TI"

(Table 03214)
Values for TI Professional PC scan/character codes:
 Scan   Key     Normal  Shift   Ctrl    Alt     Notes
 00h      -- unused
 01h    F5      3F00h   5800h   6200h   6C00h
 02h    F6      4000h   5900h   6300h   6D00h
 03h    F7      4100h   5A00h   6400h   6E00h
 04h    F8      4200h   5B00h   6500h   6F00h
 05h    F9      4300h   5C00h   6600h   7000h
 06h    F10     4400h   5D00h   6700h   7100h
 07h    F11     4500h   0800h   0A00h   0C00h
 08h    F12     4600h   0900h   0B00h   0D00h
 09h    1 !     0031h   0021h   ----    7800h
 0Ah    2 @     0032h   0040h   0300h   7900h
 0Bh    3 #     0033h   0023h   ----    7A00h
 0Ch    4 $     0034h   0024h   ----    7B00h
 0Dh    5 %     0035h   0025h   ----    7C00h
 0Eh    6 ^     0036h   005Eh   001Eh   7D00h
 0Fh    7 &     0037h   0026h   ----    7E00h
 10h    8 *     0038h   002Ah   ----    7F00h
 11h    9 (     0039h   0028h   ----    8000h
 12h    0 )     0030h   0029h   ----    8100h
 13h    - _     002Dh   005Fh   001Fh   8200h
 14h    = +     003Dh   002Bh   ----    8300h
 15h BACK SPACE 0008h   0008h   007Fh   ----
 16h    ` ~     0060h   007Eh   ----    ----
 17h    NUM =   003Dh   003Dh   003Dh   8C00h
 18h    NUM +   002Bh   002Bh   002Bh   8D00h
 19h   NUM SPAC 0020h   0020h   0020h   8E00h
 1Ah   NUM TAB  0009h   0F00h   0009h   8F00h
 1Bh    NUM 1   0031h   0031h   0031h   (alt-###)       [Note 5]
 1Ch    (unused)
 1Dh    NUM 0   0030h   0030h   0030h   (alt-###)       [Note 5]
 1Eh  NUM ENTER 000Dh   000Dh   000Dh   ----
 1Fh    NUM 4   0034h   0034h   0034h   (alt-###)       [Note 5]
 20h    NUM 5   0035h   0035h   0035h   (alt-###)       [Note 5]
 21h    NUM 9   0039h   0039h   0039h   (alt-###)       [Note 5]
 22h    NUM -   002Dh   002Dh   002Dh   ----
 23h    NUM 2   0032h   0032h   0032h   (alt-###)       [Note 5]
 24h-26h  -- unused
 27h    NUM 7   0037h   0037h   0037h   (alt-###)       [Note 5]
 28h    NUM 8   0038h   0038h   0038h   (alt-###)       [Note 5]
 29h    NUM 6   0036h   0036h   0036h   (alt-###)       [Note 5]
 2Ah    NUM ,   002Ch   002Ch   002Ch   ----
 2Bh    NUM 3   0033h   0033h   0033h   (alt-###)       [Note 5]
 2Ch    NUM .   002Eh   002Eh   002Eh   ----
 2Dh    PRINT   7200h   [Note2] ----    ----    [Notes 1,2]
 2Eh   RtArrow  4D00h   8A00h   7400h   4E00h
 2Fh    INS     5200h   2800h   2900h   2A00h   [Note 1]
 30h    DEL     5300h   3800h   3900h   3A00h   [Note 1]
 31h    TAB     0009h   0F00h   0009h   ----
 32h    Q       0071h   0051h   0011h   1000h
 33h    W       0077h   0057h   0017h   1100h
 34h    E       0065h   0045h   0005h   1200h
 35h    R       0072h   0052h   0012h   1300h
 36h    T       0074h   0054h   0014h   1400h
 37h    Y       0079h   0059h   0019h   1500h
 38h    U       0075h   0055h   0015h   1600h
 39h    I       0069h   0049h   0009h   1700h
 3Ah    O       006Fh   004Fh   000Fh   1800h
 3Bh    P       0070h   0050h   0010h   1900h
 3Ch    [ {     005Bh   007Bh   001Bh   ----
 3Dh    ] }     005Dh   007Dh   001Dh   ----
 3Eh  LINE FEED 000Ah   000Ah   7500h   4F00h
 3Fh  BRK/PAUS  [Note3] [Note4] ----    ----    [Notes 1,3,4]
 40h  UpArrow   4800h   8800h   8400h   4900h
 41h    ESC     001Bh   001Bh   001Bh   ----
 42h    A       0061h   0041h   0001h   1E00h
 43h    S       0073h   0053h   0013h   1F00h
 44h    D       0064h   0044h   0004h   2000h
 45h    F       0066h   0046h   0006h   2100h
 46h    G       0067h   0047h   0007h   2200h
 47h    H       0068h   0048h   0008h   2300h
 48h    J       006Ah   004Ah   000Ah   2400h
 49h    K       006Bh   004Bh   000Bh   2500h
 4Ah    L       006Ch   004Ch   000Ch   2600h
 4Bh    ; :     003Bh   003Ah   ----    ----
 4Ch    ' "     0027h   0022h   ----    ----
 4Dh    RETURN  000Dh   000Dh   000Dh   ----
 4Eh    \ |     005Ch   007Ch   001Ch   ----
 4Fh  LeftArrow 4B00h   8B00h   7300h   4C00h
 50h    HOME    4700h   8600h   7700h   8500h
 51h  Space Bar 0020h   0020h   0020h   0020h
 52h    Z       007Ah   005Ah   001Ah   2C00h
 53h    X       0078h   0058h   0018h   2D00h
 54h    C       0063h   0043h   0003h   2E00h
 55h    V       0076h   0056h   0016h   2F00h
 56h    B       0062h   0042h   0002h   3000h
 57h    N       006Eh   004Eh   000Eh   3100h
 58h    M       006Dh   004Dh   000Dh   3200h
 59h    , <     002Ch   003Ch   ----    ----
 5Ah  PRINT     7200h   [Note2] ----    ----    [Notes 1,2]
 5Bh    . >     002Eh   003Eh   ----    ----
 5Ch    / ?     002Fh   003Fh   ----    ----
 5Dh    (unused)
 5Eh    DEL     5300h   3800h   3900h   3A00h   [Note 1]
 5Fh    INS     5200h   2800h   2900h   2A00h   [Note 1]
 60h  DownArrow 5000h   8900h   7600h   5100h
 61h-63h  -- unused
 64h  BRK/PAUS  [Note3] [Note4] ----    ----    [Notes 1,3,4]
 65h    F1      3B00h   5400h   5E00h   6800h
 66h    F2      3C00h   5500h   5F00h   6900h
 67h    F3      3D00h   5600h   6000h   6A00h
 68h    F4      3E00h   5700h   6100h   6B00h
 69h-6Fh  -- unused
Notes:  [1] four of the keys can have differing scan codes, depending on the
          actual keyboard; the BIOS accepts either scan code ("normal": 2Fh,
          30h, 5Ah, 64h; "alternate": 2Dh,3Fh,5Eh,5Fh) for any of these keys
        [2] Shift-Print invokes INT 5E for a screen dump; the PRTSCRN.DEV
          device driver also supports Alt-Print, Ctrl-Print, Shift-Alt-Print,
          and Shift-Ctrl-Print for dumping graphics in various permutations
        [3] BRK/PAUS invokes INT 5C for a pause, then stuffs 0100h into the
          keyboard buffer
        [4] Shift-BRK/PAUS invokes INT 5D for the Break, then stuffs 0000h
          into the keyboard buffer; MS-DOS hooks INT 5D to keep the 0000h from
          appearing in the keyboard buffer
        [5] on the TI Pro, one enters an arbitrary character slightly
          differently than on a standard PC: exactly three numberpad digits
          must be pressed (using leading zeros for codes less than 100), and
          the key for the requested code is inserted into the keyboard buffer
          immediately on pressing the third key.  The Alt key may be released
          and re-pressed arbitrarily often between digits without affecting
          the Alt-digit-digit-digit sequence.
        scan codes with bit 7 set are not key releases, but rather
          auto-repeated keystrokes, which the BIOS only places into the
          keyboard buffer if the buffer is empty at the time (thus avoiding
          typeahead of repeated keystrokes faster than they can be processed)
SeeAlso: #00006 at INT 09
--------h-4B---------------------------------
INT 4B - Z100 - Slave 8259 - S100 vectored line 3
SeeAlso: INT 4A"Z100",INT 4C"Z100"
--------d-4B---------------------------------
INT 4B - Common Access Method SCSI interface (draft revision 1.9)
        ES:DI -> CAM Control Block (see #03229 at INT 4F/AX=8100h)
InstallCheck:   test for the string "SCSI_CAM" eight bytes past the INT 4Bh
          handler
Notes:  the CAM committee moved the interface to INT 4F after revision 1.9
          to avoid conflicting with the IBM SCSI interface and the Virtual
          DMA specification
        the only driver to date reported to use the CAM interface on INT 4B
          instead of INT 4F is from Future Domain (which has drivers for CAM
          on either interrupt)
SeeAlso: INT 4F/AX=8100h
Index:  installation check;Common Access Method SCSI interface
--------b-4B---------------------------------
INT 4B - Tandy 2000 - EQUIPMENT DETERMINATION
Return: AX = BIOS equipment list word (see #03215)
Note:   this interrupt is identical to INT 11 on the Tandy 2000
SeeAlso: INT 11"EQUIPMENT",INT 4A"Tandy 2000",INT 4C"Tandy 2000"

Bitfields for Tandy 2000 BIOS equipment list:
Bit(s)  Description     (Table 03215)
 0      reserved
 1      monochrome graphics installed
 2      graphics with color option installed
 3      floppy disk drive 1 installed
 4      floppy disk drive 2 installed
 5      hard disk drive 1 installed
 6      hard disk drive 2 installed
 7      unused
 8      black and white monitor
 9      color monitor
 12-10  reserved
 13     printer installed
 14     reserved
 15     unused
SeeAlso: #00226 at INT 11
--------O-4B---------------------------------
INT 4B - Acorn BBC Master 512 - "OSBYTE" - MISC FUNCTIONS USING REGISTER PARAMS
        AL = function code
        BL = first parameter
        BH = second parameter (if needed)
Return: BL = first return parameter
        BH = second return parameter
        CF depends on function
SeeAlso: INT 40"Acorn",INT 4A"Acorn",INT 4C"Acorn"
--------b-4B00-------------------------------
INT 4B - TI Professional PC - PARALLEL PORT - OUTPUT CHARACTER
        AH = 00h
        DL = printer number (00h)
        AL = character to print
Return: AH = printer status (see #03216)
Note:   on the TI Pro, the BIOS only supports DL=00h; MS-DOS versions for the
          TI hook INT 4B and handle requests for DL<>00h
SeeAlso: AH=01h,AH=02h,INT 17/AH=00h
SeeAlso: INT 40"TI Professional",INT 48/AH=00h"TI Professional"
SeeAlso: INT 49/AH=01h"TI",INT 4C"TI Professional",INT 4D/AH=00h

Bitfields for TI Professional PC printer status:
Bit(s)  Description     (Table 03216)
 0      timeout (function 00h only)
 3-1    unused
 4      busy
 5      paper out
 6      on-line (selected)
 7      fault
--------b-4B01-------------------------------
INT 4B - TI Professional PC - PARALLEL PORT - INITIALIZE PRINTER
        AH = 01h
        DL = printer number (00h)
Return: AH = printer status (see #03216)
Note:   on the TI Pro, the BIOS only supports DL=00h; MS-DOS versions for the
          TI hook INT 4B and handle requests for DL<>00h
SeeAlso: AH=00h,AH=02h,INT 17/AH=01h
--------b-4B02-------------------------------
INT 4B - TI Professional PC - PARALLEL PORT - GET PRINTER STATUS
        AH = 02h
        DL = printer number (00h)
Return: AH = printer status (see #03216)
Note:   on the TI Pro, the BIOS only supports DL=00h; MS-DOS versions for the
          TI hook INT 4B and handle requests for DL<>00h
SeeAlso: AH=00h,AH=01h,INT 17/AH=02h
--------d-4B80-------------------------------
INT 4B - IBM SCSI interface
        AH = 80h
        AL = 00h-10h (Corel PowerSCSI INT4BCAM.SYS)
        further details not yet available
--------d-4B8102DX0000-----------------------
INT 4B - Virtual DMA Specification (VDS) - GET VERSION
        AX = 8102h
        DX = 0000h
Return: CF clear if successful
            AH = major version number
            AL = minor version number
            BX = product number (see #03217)
            CX = product revision number
                always 0000h for QMAPS and HPMM.SYS
                always 0001h for Microsoft's EMM386.EXE v4.20-4.41
            DX = flags (see #03219)
            SI:DI = maximum DMA buffer size
        CF set on error
            AL = error code (see #03218)
Note:   bit 5 of 0040h:007Bh is supposed to be set if VDS is supported; this is
          apparently not always the case
SeeAlso: INT 2C/AX=002Bh,INT 31/AX=0400h,MEM 0040h:007Bh"4Bh"
Index:  installation check;Virtual DMA Specification

(Table 03217)
Values for VDS product number:
 0000h  for Quadtel's QMAPS and Hewlett-Packard's HPMM.SYS
 0001h  for Microsoft's EMM386.EXE
 0003h  for Windows 3.x WIN386.EXE
 0300h  OS/2 (all versions to date)
 0EDCh  for DR DOS 6.0 EMM386.SYS
 4560h  ("E`") for Qualitas' 386MAX
 4D43h  ("MC") for V Communications' Memory Commander
 5145h  ("QE") for Quarterdeck's QEMM-386
 524Dh  ("RM") for Helix's Netroom RM386

(Table 03218)
Values for VDS error code:
 01h    region not in contiguous memory
 02h    region crossed a physical alignment boundary
 03h    unable to lock pages
 04h    no buffer available
 05h    region too large for buffer
 06h    buffer currently in use
 07h    invalid memory region
 08h    region was not locked
 09h    number of physical pages greater than table length
 0Ah    invalid buffer ID
 0Bh    copy out of buffer range
 0Ch    invalid DMA channel number
 0Dh    disable count overflow
 0Eh    disable count underflow
 0Fh    function not supported
 10h    reserved flag bits set in DX

Bitfields for VDS flags:
Bit(s)  Description     (Table 03219)
 0      PC/XT bus (DMA in first megabyte only)
 1      physical buffer/remap region in first megabyte
 2      automatic remap enabled
 3      all memory is physically contiguous
 4-15   reserved (zero)
--------d-4B8103-----------------------------
INT 4B - Virtual DMA Specification - LOCK DMA REGION
        AX = 8103h
        DX = flags (see #03220)
        ES:DI -> DMA descriptor structure (see #03221,#03222,#03223)
Return: CF clear if successful
            DDS physical address field filled in
            DDS buffer ID field filled (0000h if no buffer allocated)
        CF set on error
            AL = error code (see #03218)
            DDS region size field filled wth maximum contiguous length in bytes
BUGS:   Windows 3.0 does not correctly support automatic remapping or copying
          in enhanced mode
        Windows 3.0 in enhanced mode does not return a correct code on error
SeeAlso: AX=8104h,AX=8105h

Bitfields for VDS flags:
Bit(s)  Description     (Table 03220)
 0      reserved (zero)
 1      data should be copied into buffer (ignored if 2 set)
 2      buffer should not be allocated if region noncontiguous or crosses
          physical alignment boundary specified by 4-5
 3      don't attempt automatic remap
 4      region must not cross 64K physical alignment boundary
 5      region must not cross 128K physical alignment boundary
 6-15   reserved (zero)

Format of DMA descriptor structure (DDS):
Offset  Size    Description     (Table 03221)
 00h    DWORD   region size
 04h    DWORD   offset
 08h    WORD    segment/selector
 0Ah    WORD    buffer ID
 0Ch    DWORD   physical address

Format of Extended DMA descriptor structure (EDDS):
Offset  Size    Description     (Table 03222)
 00h    DWORD   region size
 04h    DWORD   offset
 08h    WORD    segment/selector
 0Ah    WORD    reserved
 0Ch    WORD    number available
 0Eh    WORD    number used
 10h    DWORD   region 0 physical address
 14h    DWORD   region 0 size in bytes
 18h    DWORD   region 1 physical address
 1Ch    DWORD   region 1 size in bytes
        ...

Format of Extended DMA descriptor structure (EDDS) with page table entries:
Offset  Size    Description     (Table 03223)
 00h    DWORD   region size
 04h    DWORD   offset
 08h    WORD    segment/selector
 0Ah    WORD    reserved
 0Ch    WORD    number available
 0Eh    WORD    number used
 10h    DWORD   page table entry 0 (same as 80386 page table entry)
 14h    DWORD   page table entry 1
        ...
Note:   bits 1-11 of the page table entries should be zero; bit 0 set if page
          is present and locked
--------d-4B8104-----------------------------
INT 4B - Virtual DMA Specification - UNLOCK DMA REGION
        AX = 8104h
        DX = flags
            bit 0: reserved (zero)
            bit 1: data should be copied out of buffer
            bits 2-15 reserved (zero)
        ES:DI -> DMA descriptor structure (see #03221,#03222) with region size,
                  physical address, and buffer ID fields set
Return: CF clear if successful
            DDS physical address field set
            DDS buffer ID field set (0000h if no buffer allocated)
        CF set on error
            AL = error code (see #03218)
            DDS region size field filled wth maximum contiguous length in bytes
Note:   Windows 3.0 does not check whether the region extends beyond the end of
          a segment
BUG:    Windows 3.0 in enhanced mode does not return a correct code on error
SeeAlso: AX=8103h,AX=8106h
--------d-4B8105-----------------------------
INT 4B - Virtual DMA Specification - SCATTER/GATHER LOCK REGION
        AX = 8105h
        DX = flags (see #03224)
        ES:DI -> Extended DMA descriptor structure (see #03222,#03223)
                  region size, linear segment, linear offset, and number avail
                  fields set
Return: CF clear if successful
            EDDS number used field set
            if DX bit 6 set, lower 12 bits of BX = offset in first page
        CF set on error
            AL = error code (see #03218)
            EDDS region size field filled with max length in bytes that can be
                  locked and described in the EDDS table
BUG:    Windows 3.0 in enhanced mode may return zero instead of the physical
          page address for pages which were originally not present
SeeAlso: AX=8103h,AX=8106h

Bitfields for VDS flags:
Bit(s)  Description     (Table 03224)
 0-5    reserved (zero)
 6      EDDS should be returned with page table entries
 7      only present pages should be locked (not-present pages receive entry
          of 0000h)
 8-15   reserved (zero)
--------d-4B8106-----------------------------
INT 4B - Virtual DMA Specification - SCATTER/GATHER UNLOCK REGION
        AX = 8106h
        DX = flags (see #03225)
        ES:DI -> Extended DMA descriptor structure (see #03222,#03223) returned
                  by AX=8105h
Return: CF clear if successful
        CF set on error
            AL = error code (see #03218)
Note:   according to the Microsoft version of the VDS specification, the
          actual scatter/gather list is ignored, while according to the IBM
          version of the specification, "the result of a LOCK operation"
          must be provided to this function
SeeAlso: AX=8104h,AX=8105h

Bitfields for VDS flags:
Bit(s)  Description     (Table 03225)
 0-5    reserved (zero)
 6      EDDS contains page table entries
 7      EDDS may contain not-present pages (entry = 0000h)
 8-15   reserved (zero)
--------d-4B8107-----------------------------
INT 4B - Virtual DMA Specification - REQUEST DMA BUFFER
        AX = 8107h
        DX = flags
            bit 0: reserved (zero)
            bit 1: data should be copied into buffer
            bits  2-15 reserved (zero)
        ES:DI -> DMA descriptor structure (see #03221) with region size set
                  (also region offset and region segment if DX bit 1 set)
Return: CF clear if successful
            DDS physical address and buffer ID set
            DDS region size filled with length of buffer
        CF set on error
            AL = error code (see #03218)
SeeAlso: AX=8108h
--------d-4B8108-----------------------------
INT 4B - Virtual DMA Specification - RELEASE DMA BUFFFER
        AX = 8108h
        DX = flags
            bit 0: reserved (zero)
            bit 1: data should be copied out of buffer
            bits 2-15 reserved (zero)
        ES:DI -> DMA descriptor structure (see #03221,#03222) with buffer ID set
                  (also region size/region offset/segment if DX bit 1 set)
Return: CF clear if successful
        CF set on error
            AL = error code (see #03218)
BUG:    under Windows 3.0 Enhanced mode, you must specify that data be copied
          for this function to work correctly
SeeAlso: AX=8107h
--------d-4B8109DX0000-----------------------
INT 4B - Virtual DMA Specification - COPY INTO DMA BUFFER
        AX = 8109h
        DX = 0000h
        ES:DI -> DMA descriptor structure (see #03221,#03222) with buffer ID,
                  region segment/offset, and region size fields set
        BX:CX = starting offset into DMA buffer
Return: CF clear if successful
        CF set on error
            AL = error code (see #03218)
BUG:    Windows 3.0 Enhanced mode does not correctly interpret the copy count
SeeAlso: AX=810Ah
--------d-4B810ADX0000-----------------------
INT 4B - Virtual DMA Specification - COPY OUT OF DMA BUFFER
        AX = 810Ah
        DX = 0000h
        ES:DI -> DMA descriptor structure (see #03221,#03223) with buffer ID,
                  region segment/offset, and region size fields set
        BX:CX = starting offset into DMA buffer
Return: CF clear if successful
        CF set on error
            AL = error code (see #03218)
BUG:    Windows 3.0 Enhanced mode does not correctly interpret the copy count
SeeAlso: AX=8109h
--------d-4B810B-----------------------------
INT 4B - Virtual DMA Specification - DISABLE DMA TRANSLATION
        AX = 810Bh
        BX = DMA channel number
        DX = 0000h
Return: CF clear if successful
        CF set on error
            AL = error code (see #03218)
SeeAlso: AX=810Ch
--------d-4B810C-----------------------------
INT 4B - Virtual DMA Specification - ENABLE DMA TRANSLATION
        AX = 810Ch
        BX = DMA channel number
        DX = 0000h
Return: CF clear if successful
            ZF set if disable count decremented to zero
        CF set on error
            AL = error code (see #03218)
SeeAlso: AX=810Bh
--------Q-4B810D-----------------------------
INT 4B - QEMM-386 - BUG
        AX = 810Dh
Note:   the code in QEMM v5.11 and 6.00 jumps to an invalid location on this
          call
--------h-4C---------------------------------
INT 4C - Z100 - Slave 8259 - S100 vectored line 4
SeeAlso: INT 4B"Z100",INT 4D"Z100"
--------b-4C---------------------------------
INT 4C - TI Professional PC - CLOCK/ANALOG INTERFACE
        no details available
SeeAlso: INT 40"TI Professional",INT 49/AH=01h"TI"
SeeAlso: INT 4A/AH=00h"TI",INT 4B"TI Professional",INT 4D/AH=00h
SeeAlso: INT 58"TI Professional"
--------b-4C---------------------------------
INT 4C - Tandy 2000 - GET MEMORY SIZE
Return: AX = kilobytes of contiguous memory starting at 0
Note:   this interrupt is identical to INT 12 on the Tandy 2000
SeeAlso: INT 12"BIOS",INT 4A"Tandy 2000",INT 4B"Tandy 2000",INT 51"Tandy 2000"
--------O-4C---------------------------------
INT 4C - Acorn BBC Master 512 - "OSCLI" - INTERPRET COMMAND LINE
        DS:BX -> CR-terminated command string
Return: FLAGS destroyed
SeeAlso: INT 40"Acorn",INT 4A"Acorn",INT 4B"Acorn"
--------h-4D---------------------------------
INT 4D - Z100 - Slave 8259 - S100 vectored line 5
SeeAlso: INT 4C"Z100",INT 4E"Z100"
--------s-4D---------------------------------
INT 4D - IBM - M-Audio Adapter SUPPORT
        no details available; supposedly documented in IBM form G571-0203-01
--------B-4D00-------------------------------
INT 4D - TI Professional PC - DISK - RESET DISK SYSTEM
        AH = 00h
        DL = drive (if bit 7 is set both hard disks and floppy disks reset)
Return: AH = status (see #00234 at INT 13/AH=01h)
        CF clear if successful (returned AH=00h)
        CF set on error
Note:   this function is the same as INT 13/AH=00h on a standard PC BIOS
SeeAlso: AH=01h,AH=02h,AH=08h,AH=0Bh,INT 13/AH=00h,INT 46"TI Professional"
SeeAlso: INT 48/AH=00h"TI Professional",INT 4A/AH=00h"TI"
--------B-4D01-------------------------------
INT 4D - TI Professional PC - DISK - GET STATUS OF LAST OPERATION
        AH = 01h
        DL = drive (bit 7 set for hard disk)
Return: CF clear if status unchanged
        CF set if status changed since last call
        AH = 00h
        AL = status of previous operation (see #00234 at INT 13/AH=01h)
Notes:  this function is nearly the same as INT 13/AH=01h on a standard PC BIOS
        the TI's BIOS tranparently performs a number of retries, and an error
          status is only reported if all of the retries fail.  To get the error
          status if the operation succeeded on a retry, use AH=07h instead
SeeAlso: AH=00h,AH=07h,INT 13/AH=01h
--------B-4D02-------------------------------
INT 4D - TI Professional PC - DISK - READ SECTOR(S) INTO MEMORY
        AH = 02h
        AL = number of sectors to read (must be nonzero)
        CH = low eight bits of cylinder number
        CL = sector number 1-63 (bits 0-5)
             high two bits of cylinder (bits 6-7, hard disk only)
        DH = head number
        DL = drive number (bit 7 set for hard disk)
        ES:BX -> data buffer
Return: CF set on error
            if AH = 11h (corrected ECC error), AL = burst length
        CF clear if successful
        AH = status (see #00234 at INT 13/AH=01h)
        AL = number of sectors transferred
        ES:BX -> buffer for last sector processed (including one with errors)
SeeAlso: AH=00h,AH=01h,AH=03h,AH=04h,INT 13/AH=02h
--------B-4D03-------------------------------
INT 4D - TI Professional PC - DISK - WRITE SECTOR(S) FROM MEMORY
        AH = 03h
        AL = number of sectors to write (must be nonzero)
        CH = low eight bits of cylinder number
        CL = sector number 1-63 (bits 0-5)
             high two bits of cylinder (bits 6-7, hard disk only)
        DH = head number
        DL = drive number (bit 7 set for hard disk)
        ES:BX -> buffer containing data
Return: CF set on error
            if AH = 11h (corrected ECC error), AL = burst length
        CF clear if successful
        AH = status (see #00234 at INT 13/AH=01h)
        AL = number of sectors transferred
        ES:BX -> buffer for last sector processed (including one with errors)
SeeAlso: AH=00h,AH=01h,AH=02h,AH=04h,INT 13/AH=03h
--------B-4D04-------------------------------
INT 4D - TI Professional PC - DISK - VERIFY DISK SECTOR CRC(S)
        AH = 04h
        AL = number of sectors to verify (must be nonzero)
        CH = low eight bits of cylinder number
        CL = sector number 1-63 (bits 0-5)
             high two bits of cylinder (bits 6-7, hard disk only)
        DH = head number
        DL = drive number (bit 7 set for hard disk)
        ES:BX -> data buffer
Return: CF set on error
            if AH = 11h (corrected ECC error), AL = burst length
        CF clear if successful
        AH = status (see #00234 at INT 13/AH=01h)
        AL = number of sectors transferred
        ES:BX -> buffer for last sector processed (including one with errors)
Note:   even though no data is transferred, ES:BX must still be valid
SeeAlso: AH=00h,AH=01h,AH=02h,AH=06h,INT 13/AH=04h
--------B-4D05-------------------------------
INT 4D - TI Professional PC - DISK - NOP
        AH = 05h
Note:   on the TI Pro, FORMAT.COM contains direct port I/O commands to perform
          disk formatting, rather than using the BIOS
--------B-4D06-------------------------------
INT 4D - TI Professional PC - DISK - VERIFY DISK SECTOR(S)
        AH = 06h
        AL = number of sectors to verify (must be nonzero)
        CH = low eight bits of cylinder number
        CL = sector number 1-63 (bits 0-5)
             high two bits of cylinder (bits 6-7, hard disk only)
        DH = head number
        DL = drive number (bit 7 set for hard disk)
        ES:BX -> data buffer
Return: CF set on error
            if AH = 11h (corrected ECC error), AL = burst length
        CF clear if successful
        AH = status (see #00234 at INT 13/AH=01h)
        AL = number of sectors transferred
        ES:BX -> buffer for last sector processed (including one with errors)
Note:   even though no data is transferred, ES:BX must still be valid because
          an actual comparison with disk data is performed, not just the CRC
          check of the standard PC BIOS or INT 4D/AH=04h
SeeAlso: AH=00h,AH=01h,AH=02h,AH=04h,INT 13/AH=04h
--------B-4D07-------------------------------
INT 4D - TI Professional PC - DISK - GET RETRY STATUS OF LAST OPERATION
        AH = 07h
        DL = drive (bit 7 set for hard disk)
Return: CF clear if status unchanged
        CF set if status changed since last call
        AH = 00h
        AL = status of previous operation (see #00234 at INT 13/AH=01h)
Notes:  this function is nearly the same as INT 13/AH=01h on a standard PC BIOS
        the TI's BIOS tranparently performs a number of retries; this function
          returns the error status of a failed operation even if the operation
          succeeded on a retry
SeeAlso: AH=00h,AH=01h,INT 13/AH=01h
--------B-4D08-------------------------------
INT 4D - TI Professional PC - DISK - SET STANDARD DEVICE INTERFACE TABLE
        AH = 08h
        DL = drive number (00h-03h)
        AL = drive type
            00h single-sided 48 tpi (40-track, 8 sectors, 512 bytes/sector)
            01h double-sided 48 tpi (40-track, 8 sectors, 512 bytes/sector)
            02h single-sided 96 tpi (80-track, 8 sectors, 512 bytes/sector)
            03h double-sided 96 tpi (80-track, 8 sectors, 512 bytes/sector)
Return: nothing???
SeeAlso: AH=00h,AH=09h
--------B-4D09-------------------------------
INT 4D - TI Professional PC - DISK - SET DEVICE INTERFACE TABLE ADDRESS
        AH = 09h
        DL = drive number (00h-07h)
        ES:BX -> Device Interface Table (see #03226)
Return: nothing???
SeeAlso: AH=00h,AH=08h,AH=0Ah,INT 1E

Format of TI Professional PC Device Interface Table:
Offset  Size    Description     (Table 03226)
 00h    DWORD   -> entry point for disk routine
 04h    WORD    bytes per sector
 06h    BYTE    sectors per track
 07h    BYTE    number of heads
 08h    BYTE    number of cylinders
 09h    BYTE    retry count
 0Ah    BYTE    precompensation start
SeeAlso: #01264 at INT 1E
--------B-4D0A-------------------------------
INT 4D - TI Professional PC - DISK - GET DEVICE INTERFACE TABLE ADDRESS
        AH = 0Ah
        DL = drive number (00h-07h)
Return: AH = status
        ES:BX -> Device Interface Table (see #03226)
SeeAlso: AH=00h,AH=08h,AH=09h,INT 1E
--------B-4D0B-------------------------------
INT 4D - TI Professional PC - DISK - TURN OFF ALL DRIVES
        AH = 0Bh
Return: AH = 00h
Note:   used for diagnostics or to conserve power
SeeAlso: AH=00h
--------h-4E---------------------------------
INT 4E - Z100 - Slave 8259 - S100 vectored line 6
SeeAlso: INT 4D"Z100",INT 4F"Z100"
--------b-4E00-------------------------------
INT 4E - TI Professional PC - TIME-OF-DAY CLOCK - SET BIOS DATE
        AH = 00h
        BX = number of days since January 1, 1980
Return: nothing
SeeAlso: AH=01h,AH=02h
SeeAlso: INT 40"TI Professional",INT 48/AH=00h"TI Professional"
SeeAlso: INT 4A/AH=00h"TI",INT 4F"TI Professional"
--------b-4E01-------------------------------
INT 4E - TI Professional PC - TIME-OF-DAY CLOCK - SET BIOS TIME
        AH = 01h
        CH = hours
        CL = minutes
        DH = seconds
        DL = hundredths
Return: nothing
Note:   the BIOS does not validate the data passed to this function
SeeAlso: AH=00h,AH=02h
--------b-4E02-------------------------------
INT 4E - TI Professional PC - TIME-OF-DAY CLOCK - GET BIOS DATA AND TIME
        AH = 02h
Return: AX = number of days since January 1, 1980
        CH = hours
        CL = minutes
        DH = seconds
        DL = hundredths
SeeAlso: AH=00h,AH=01h
--------h-4F---------------------------------
INT 4F - Z100 - Slave 8259 - S100 vectored line 7
SeeAlso: INT 4E"Z100"
--------b-4F---------------------------------
INT 4F - TI Professional PC - SYSTEM CONFIGURATION CALL
Return: AX = system configuration word (see #03227)
        BX = size of contiguous DOS memory in paragraphs
SeeAlso: INT 11"BIOS",INT 12"BIOS",INT 40"TI Professional",INT 48/AH=09h
SeeAlso: INT 49/AH=01h"TI",INT 4B"TI Professional",INT 4D/AH=00h
SeeAlso: INT 4E"TI Professional"

Bitfields for TI Professional PC system configuration:
Bit(s)  Description     (Table 03227)
 0      floppy drive 0 (A:, internal) installed
 1      floppy drive 1 (B:, internal) installed
 2      floppy drive 2 (C:, external) installed
 3      floppy drive 3 (D:, external) installed
 4      drive A: is 96tpi (80 tracks)
 5      drive A: is double-sided
 6      60 Hz power instead of 50 Hz
 7      hard disk (E: or E:/F:) installed
 8      serial port 1 installed
 9      serial port 2 installed
 10     serial port 3 installed
 11     serial port 4 installed
 14-12  installed graphics RAM
        000 none (text-only system)
        001 bank A only (graphics limited to 2 of 8 colors)
        111 banks A/B/C (graphics supports 8 of 8 colors)
 15     clock/analog board installed
--------d-4F8100-----------------------------
INT 4F - Common Access Method SCSI interface rev 2.3 - SEND CCB TO XPT/SIM
        AX = 8100h
        ES:BX -> CAM Control Block (CCB) (see #03229)
Return: AH = status
            00h successful
            01h invalid CCB address (0000h:0000h)
Note:   the SCSI Interface Module (SIM) may complete the requested function
          and invoke the completion callback function before this call returns
SeeAlso: AX=8200h,INT 2F/AX=7F01h,INT 4B"Common Access Method"

(Table 03228)
Values for CAM function code:
 00h    NOP
 01h    execute SCSI I/O
 02h    get device type
 03h    path inquiry
 04h    release SIM queue
 05h    set async callback
 06h    set device type
 07h-0Fh reserved
 10h    abort SCSI command
 11h    reset SCSI bus
 12h    reset SCSI device
 13h    terminate I/O process
 14h-1Fh reserved
 20h    engine inquiry
 21h    execute engine request
 22h-2Fh reserved
 30h    enable logical unit number
 31h    execute target I/O
 32h-7Fh reserved
 80h-FFh vendor-specific functions

Format of CAM Control Block:
Offset  Size    Description     (Table 03229)
 00h    DWORD   physical address of this CCB
 04h    WORD    CAM control block length
 06h    BYTE    function code (see #03228)
 07h    BYTE    CAM status (see #03232)
 08h    BYTE    SCSI status
 09h    BYTE    path ID (FFh = XPT)
 0Ah    BYTE    target ID
 0Bh    BYTE    logical unit number
 0Ch    WORD    CAM flags (see #03230)
 0Eh    BYTE    CAM address flags (see #03231)
 0Fh    BYTE    target-mode flags (see #03233)
---function 02h---
 10h    DWORD   pointer to 36-byte buffer for inquiry data or 0000h:0000h
 14h    BYTE    peripheral device type of target logical unit number
---function 03h---
 10h    BYTE    version number (00h-07h prior to rev 1.7, 08h = rev 1.7,
                09h-FFh = rev no, i.e. 23h = rev 2.3)
 11h    BYTE    SCSI capabilities (see #03234)
 12h    BYTE    target mode support
                bit 7: processor mode
                bit 6: phase-cognizant mode
                bit 5-0: reserved
 13h    BYTE    miscellaneous flags
                bit 7: scanned high to low instead of low to high
                bit 6: removables not included in scan
                bit 5: inquiry data not kept by XPT
                bits 4-0: reserved
 14h    WORD    engine count
 16h 14 BYTEs   vendor-specific data
 24h    DWORD   size of private data area
 28h    DWORD   asynchronous event capabilities (see #03235)
 2Ch    BYTE    highest path ID assigned
 2Dh    BYTE    SCSI device ID of initiator
 2Eh  2 BYTEs   reserved
 30h 16 BYTEs   SIM vendor ID
 40h 16 BYTEs   HBA (host bus adaptor) vendor ID
 50h  4 BYTEs   operating-system dependant usage
---functions 00h,04h,11h,12h---
 no additional fields
---function 05h---
 10h    DWORD   asynchronous event enables (refer to function 03h above)
 14h    DWORD   pointer to asynchronous callback routine (see #03241)
 18h    DWORD   pointer to peripheral driver buffer
 1Ch    BYTE    size of peripheral buffer
---function 06h---
 10h    BYTE    peripheral device type of target
---functions 10h,13h---
 10h    DWORD   pointer to CCB to be aborted
---function 20h---
 10h    WORD    engine number
 12h    BYTE    engine type
                00h buffer memory
                01h lossless compression
                02h lossy compression
                03h encryption
 13h    BYTE    engine algorithm ID
                00h vendor-unique
                01h LZ1 variation 1 (STAC)
                02h LZ2 variation 1 (HP DCZL)
                03h LZ2 variation 2 (Infochip)
 14h    DWORD   engine memory size
---function 21h---
 10h    DWORD   pointer to peripheral driver
 14h  4 BYTEs   reserved
 18h    DWORD   OS-dependent request-mapping info
 1Ch    DWORD   address of completion callback routine
 20h    DWORD   pointer to scatter/gather list or data buffer
 24h    DWORD   length of data transfer
 28h    DWORD   pointer to engine buffer data
 2Ch  2 BYTEs   reserved
 2Eh    WORD    number of scatter/gather entries
 30h    DWORD   maximum destination data length
 34h    DWORD   length of destination data
 38h    DWORD   source residual length
 3Ch 12 BYTEs   reserved
 48h    DWORD   OS-dependent timeout value
 4Ch  4 BYTEs   reserved
 50h    WORD    engine number
 52h    WORD    vendor-unique flags
 54h  4 BYTEs   reserved
 58h  N BYTEs   private data area for SIM
---function 30h---
 10h    WORD    group 6 vendor-unique CDB length
 12h    WORD    group 7 vendor-unique CDB length
 14h    DWORD   pointer to target CCB list
 18h    WORD    number of target CCBs
---other functions---
 10h    DWORD   pointer to peripheral driver
 14h    DWORD   pointer to next CCB
 18h    DWORD   OS-dependent request mapping information
 1Ch    DWORD   address of completion callback routine (see #03240)
 20h    DWORD   pointer to scatter/gather list or data buffer
 24h    DWORD   length of data transfer
 28h    DWORD   pointer to sense info buffer
 2Ch    BYTE    length of sense info buffer
 2Dh    BYTE    CDB length
 2Eh    WORD    number of scatter/gather entries
                scatter/gather list is array of 2N DWORDs, each pair specifying
                  the address and length of a data block
 30h  4 BYTEs   vendor-specific data
 34h    BYTE    (ret) SCSI status
 35h    BYTE    (ret) auto-sense residual length
 36h  2 BYTEs   reserved
 38h    DWORD   (ret) residual length
 40h 12 BYTEs   Command Descriptor Block (CDB) (see #03236,#03237,#03238)
 44h    DWORD   OS-dependent timeout value
 48h    DWORD   pointer to message buffer
 4Ch    WORD    length of message buffer
 4Eh    WORD    vendor-unique flags
 50h    BYTE    tag queue action
 51h  3 BYTEs   reserved
 54h  N BYTEs   private data area for SIM

Bitfields for CAM flags:
Bit(s)  Description     (Table 03230)
 0      CDB is a pointer
 1      tagged queue action enable
 2      linked CDB
 3      disable callback on completion
 4      scatter/gather
 5      disable autosense
 7-6    direction (00 reserved, 01 in, 10 out, 11 no data transfer)
 9-8    reserved
 10     engine synchronize
 11     SIM queue freeze
 12     SIM queue priority
        1 head insertion
        0 tail insertion (normal)
 13     disable synchronous transfers   \ mutually
 14     initiate synchronous transfers  / exclusive
 15     disable disconnect

Bitfields for CAM address flags:
Bit(s)  Description     (Table 03231)
 7      SG list/data (0 = host, 1 = engine)
 6      CDB pointer    (6-1: 0=virtual addr, 1=phys addr)
 5      SG list/data
 4      sense buffer
 3      message buffer
 2      next CCB
 1      callback on completion
 0      reserved

(Table 03232)
Values for CAM status:
 00h    request in progress
 01h    request successful
 02h    host aborted request
 03h    unable to abort request
 04h    request completed with error
 05h    CAM is busy
 06h    invalid request
 07h    invalid path ID
 08h    no such SCSI device
 09h    unable to terminate I/O process
 0Ah    timeout on target selection
 0Bh    timeout on command
 0Dh    receive message rejection
 0Eh    sent/received SCSI bus reset
 0Fh    detected uncorrectable parity error
 10h    Autosense request failed
 11h    no HBA detected
 12h    data over/underrun
 13h    bus freed unexpectedly
 14h    target bus phase sequence failure
 15h    CCB too small
 16h    requested capability not available
 17h    sent bus device reset
 18h    terminate I/O process
 38h    invalid LUN
 39h    invalid target ID
 3Ah    unimplemented function
 3Bh    nexus not established
 3Ch    invalid initiator ID
 3Dh    received SCSI Command Descriptor Block
 3Eh    LUN already enabled
 3Fh    SCSI bus busy
Note:   bit 6 set to indicate frozen SIM queue
        bit 7 set to indicate valid autosense

Bitfields for CAM target-mode flags:
Bit(s)  Description     (Table 03233)
 7      data buffer valid
 6      status valid
 5      message buffer valid
 4      reserved
 3      phase-cognizant mode
 2      target CCB available
 1      disable autodisconnect
 0      disable autosave/restore

Bitfields for SCSI capabilities:
Bit(s)  Description     (Table 03234)
 7      modify data pointers
 6      wide bus (32 bits)
 5      wide bus (16 bits)
 4      synchronous transfers
 3      linked commands
 2      reserved
 1      tagged queueing
 0      soft reset

Bitfields for CAM asynchronous event capabilities:
Bit(s)  Description     (Table 03235)
 31-24  vendor-specific
 23-8   reserved
 7      new devices found during rescan
 6      SIM module deregistered
 5      SIM module registered
 4      sent bus device reset to target
 3      SCSI AEN
 2      reserved
 1      unsolicited reselection
 0      unsolicited SCSI bus reset

Format of Six-Byte SCSI Command Descriptor Block (CDB):
Offset  Size    Description     (Table 03236)
 00h    BYTE    operation code (see #03239)
 01h    BYTE    logical unit number (bits 7-5), SCSI-1/SCSI-2
                MSB of logical block address (bits 4-0)
 02h    WORD    logical block address (low word)
 04h    BYTE    transfer length
 05h    BYTE    control byte
SeeAlso: #03237,#03238

Format of Ten-Byte SCSI Command Descriptor Block (CDB):
Offset  Size    Description     (Table 03237)
 00h    BYTE    operation code (see #03239)
 01h    BYTE    logical unit number (bits 7-5), SCSI-1/SCSI-2
                reserved in SCSI-3
 02h    DWORD   logical block address (low word)
 06h    BYTE    reserved
 07h    WORD    transfer length
 09h    BYTE    control byte
SeeAlso: #03236,#03238

Format of Twelve-Byte SCSI Command Descriptor Block (CDB):
Offset  Size    Description     (Table 03238)
 00h    BYTE    operation code (see #03239)
 01h    BYTE    logical unit number (bits 7-5), SCSI-1/SCSI-2
                reserved in SCSI-3
 02h    DWORD   logical block address (low word)
 06h    DWORD   transfer length
 0Ah    BYTE    reserved
 0Bh    BYTE    control byte
SeeAlso: #03236,#03237

(Table 03239)
Values for SCSI CDB operation code for direct-access devices:
 00h    Test Unit Ready
 01h    Rezero Unit
 03h    Request Sense
 04h    Format Unit
 07h    Reassign Blocks
 08h    Read (6-byte CDB)
 0Ah    Write (6-byte CDB)
 0Bh    Seek (6-byte CDB)
 12h    Inquiry
 15h    Mode Select (6-byte CDB)
 16h    Reserve
 17h    Release
 18h    Copy
 1Ah    Mode Sense (6-byte CDB)
 1Bh    Start/Stop Unit
 1Ch    Receive Diagnostic Results
 1Dh    Send Diagnostic
 1Eh    Prevent/Allow Medium Removal
 25h    Read Capacity
 28h    Read (10-byte CDB)
 2Ah    Write (10-byte CDB)
 2Bh    Seek (10-byte CDB)
 2Eh    Write and Verify
 2Fh    Verify
 30h    Search Data High
 31h    Search Data Equal
 32h    Search Data Low
 33h    Set Limits
 34h    Prefetch
 35h    Synchronize Cache
 36h    Lock/Unlock Cache
 37h    Read Defect Data
 39h    Compare
 3Ah    Copy and Verify
 3Bh    Write Buffer
 3Ch    Read Buffer
 3Eh    Read Long
 3Fh    Write Long
 40h    Change Definition
 41h    Write Same
 4Ch    Log Select
 4Dh    Log Sense
 55h    Mode Select (10-byte CDB)
 5Ah    Mode Sense (10-byte CDB)
SeeAlso: #03236,#03237,#03238

(Table 03240)
Values completion callback function is called with:
        interrupts disabled
        ES:BX -> completed CCB

(Table 03241)
Values asynchronous callback function is called with:
        AH = opcode
        AL = path ID generating callback
        DH = target ID causing event
        DL = LUN causing event
        CX = data byte count (if applicable)
        ES:BX -> data buffer (if applicable)
Return: all registers preserved
--------d-4F8200CX8765-----------------------
INT 4F - Common Access Method SCSI interface rev 2.3 - INSTALLATION CHECK
        AX = 8200h
        CX = 8765h
        DX = CBA9h
Return: AH = 00h if installed
            CX = 9ABCh
            DX = 5678h
            ES:DI -> "SCSI_CAM"
SeeAlso: AX=8100h,INT 4B"Common Access Method"
--------N-50---------------------------------
INT 50 - TIL Xpert AIM (X.25)
        AH = function
--------H-50---------------------------------
INT 50 - IRQ0 relocated by DESQview
Range:  INT 50 to INT F8, selected automatically
Notes:  this is the default location for older versions; DESQview v2.26+
          searches for unused ranges of interrupts and uses the lowest
          available range in its list for relocating these IRQs and the next
          lowest for relocating IRQ8-IRQ15
        a range of eight interrupts starting at a multiple of 8 is considered
          available if all vectors are identical and it has not been excluded
          with an /XB:nn commandline switch
        the list of ranges for v2.26 is 50h,58h,68h,78h,F8h (if < two of these
          are available, F8h and then 50h are used anyway)
        the list of ranges for v2.31+ is 68h,78h,88h-B8h,F8h (if < two of these
          are available, F8h and then F0h are used anyway)
SeeAlso: INT 08"IRQ0",INT 51"DESQview",INT 54"DESQview",INT 58"DESQview"
SeeAlso: INT D8"Screen Thief"
--------H-50---------------------------------
INT 50 - IRQ0 relocated by IBM 3278 emulation control program
SeeAlso: INT 51"IBM 3278"
--------H-50---------------------------------
INT 50 - IRQ0 relocated by OS/2 v1.x
SeeAlso: INT 51"OS/2"
----------50---------------------------------
INT 50 - TI Professional PC - FATAL SOFTWARE ERROR TRAP
Desc:   the default handler generates a System Error message and halts the
          computer such that only Ctrl-Alt-Del can restart operation
Note:   documented as "for system use only"; intended for multi-tasking
          software
SeeAlso: INT 40"TI Professional",INT 4F"TI Professional"
SeeAlso: INT 51"TI Professional",INT 53"TI Professional"
--------V-500000-----------------------------
INT 50 - Vanderaart TEXT WINDOWS, PC Thuis Shell - OPEN TEXT WINDOW
        AX = 0000h
        ES:BX -> name string or ES:0000h if none
        CH,CL = row,column of upper left corner
        DH,DL = row,column of lower right corner
Return: AX = window handle or
            0000h if not installed
            FFFFh on error
SeeAlso: AX=0001h,AX=0002h"TEXT WINDOWS"
--------V-500001-----------------------------
INT 50 - Vanderaart TEXT WINDOWS, PC Thuis Shell - CLOSE TEXT WINDOW
        AX = 0001h
        DI = window handle
SeeAlso: AX=0000h
--------V-500002-----------------------------
INT 50 - Vanderaart TEXT WINDOWS - PUT CHARACTER IN WINDOW
        AX = 0002h
        BL = character
        BH = attribute
        DL = column
        DH = row
        DI = window handle
Return: AX = status
            0000h if successful
            FFFFh if outside window
SeeAlso: AX=0000h
--------l-500002-----------------------------
INT 50 - PC Thuis Organizer Shell - PLOT TEXT
        AX = 0002h
        ES:BX -> text string
        DH,DL = row,column of upper left corner
        DI = window handle
Return: AX = status
            0000h successful (text fits in window)
            FFFFh error
Program: The PC Thuis Organizer Shell was written by John Vanderaart and
          published in the June/July 1990 issue of PC Thuis Power magazine
--------V-500003-----------------------------
INT 50 - Vanderaart TEXT WINDOWS - OUTPUT LINE TO WINDOW
        AX = 0003h
        ES:BX -> text string
        CX = string length (0000h if ASCIZ string)
        DL = position (FFh centered, else flush left)
        DH = starting row
        DI = window handle
Return: AX = status
            0000h successful
            FFFFh did not fit in window
--------l-500003-----------------------------
INT 50 - PC Thuis Organizer Shell - WRITE FILE
        AX = 0003h
        ES:BX -> data to be written
        CX = number of bytes to write
        DS:SI -> filename
Return: AX = status
            0000h successful
            FFFFh error
SeeAlso: AX=0004h"Shell"
--------V-500004-----------------------------
INT 50 - Vanderaart TEXT WINDOWS - GET KEY
        AX = 0004h
        CH = type
            00h any key
            01h 'J' or 'N' (Dutch for yes/no)
Return: AX = key
SeeAlso: INT 16/AH=00h
--------l-500004-----------------------------
INT 50 - PC Thuis Organizer Shell - READ FILE
        AX = 0004h
        ES:BX -> buffer for data
        CX = number of bytes to read or 0000h for entire file
        DL = file type
            01h setting shell
            02h setting sterm
            03h INT21 file
        DS:SI -> filename
Return: AX = status
            0000h successful
            FFFFh error
Note:   file type numbers are maintained by John Vanderaart; if a new file type
          is needed, a type number should be requested from him through the
          magazine:
                PC Thuis BV
                Spaarne 55
                2011 CE HAARLEM
                The Netherlands
SeeAlso: AX=0003h"Shell"
--------V-500005-----------------------------
INT 50 - Vanderaart TEXT WINDOWS - CHANGE ATTRIBUTE
        AX = 0005h
        BL = new attribute
        CH,CL = row,column of upper left corner
        DH,DL = row,column of lower right corner
        DI = window handle
--------l-500005-----------------------------
INT 50 - PC Thuis Organizer Shell - PROMPT YES/NO
        AX = 0005h
        ES:BX -> prompt string (ES:0000h if no prompt)
Return: AX = key pressed
            0000h "J" (Dutch "Ja" = "Yes")
            FFFFh "N" (Dutch "Nee" = "No")
Program: The PC Thuis Organizer Shell was written by John Vanderaart and
          published in the June/July 1990 issue of PC Thuis Power magazine
SeeAlso: AX=0008h"PC Thuis"
--------V-500006-----------------------------
INT 50 - Vanderaart TEXT WINDOWS - EDIT LINE IN WINDOW
        AX = 0006h
        ES:BX -> text string
        CH = type of input (see #03242)
        DH,DL = row,column of upper left corner
        DI = window handle
Return: AX = key which terminated entry
            0000h Enter
            0001h Esc
            0002h Down arrow
            0003h Up arrow
            0004h F10

(Table 03242)
Values for type of input to Vanderaart Text Windows:
 00h    everything
 01h    uppercase only
 02h    positive numbers
 03h    Dutch postal code ("9999 AA")
 04h    'J' or 'N' (Dutch yes/no)
 05h    telephone or FAX number
 06h    positive or negative number
 07h    date (dd/mm/yy)
 08h    money
 09h    '1' through '8'
 0Ah    '1' through '4'
 0Bh    uppercase filenames
--------l-500006-----------------------------
INT 50 - PC Thuis Organizer Shell - ALERT USER
        AX = 0006h
        ES:BX -> string
--------l-500007-----------------------------
INT 50 - PC Thuis Organizer Shell - DO LINE
        AX = 0007h
        ES:BX -> text string
        CX = string length in bytes (0000h if NUL-terminated)
        DL = FFh to center string, else flush left
        DH = upper left row
        DI = window handle
Return: AX = status
            0000h successful
            FFFFh error
Program: The PC Thuis Organizer Shell was written by John Vanderaart and
          published in the June/July 1990 issue of PC Thuis Power magazine
SeeAlso: AX=0008h
--------l-500008-----------------------------
INT 50 - PC Thuis Organizer Shell - DO MENU
        AX = 0008h
        ES:BX -> menu structure
Return: AL = index 1 or FFh if not selected
        AH = index 2 or FFh if not selected
        BL = index 3 or FFh if not selected
        BH = index 4 or FFh if not selected
SeeAlso: AX=0005h"PC Thuis",AX=0007h,AX=000Ch
--------l-500009-----------------------------
INT 50 - PC Thuis Organizer Shell - MESSAGE ON
        AX = 0009h
        ES:BX -> message string
SeeAlso: AX=000Ah
--------l-50000A-----------------------------
INT 50 - PC Thuis Organizer Shell - MESSAGE OFF
        AX = 000Ah
SeeAlso: AX=0009h
--------l-50000B-----------------------------
INT 50 - PC Thuis Organizer Shell - CHANGE ATTRIBUTE
        AX = 000Bh
        BL = new attribute
        CH,CL = row,column of upper left corner
        DH,DL = row,column of lower right corner
        DI = window handle
--------l-50000C-----------------------------
INT 50 - PC Thuis Organizer Shell - DO REQUEST
        AX = 000Ch
        ES:BX -> request structure
Return: AX = status
            0000h confirmed
            FFFFh denied
SeeAlso: AX=0008h
--------l-50000D-----------------------------
INT 50 - PC Thuis Organizer Shell - EDIT LINE
        AX = 000Dh
        ES:BX -> text string
        CL = length
        CH = input type (see #03243)
        DH,DL = row,column of upper left corner
        DI = window handle
Return: AX = result code
Program: The PC Thuis Organizer Shell was written by John Vanderaart and
          published in the June/July 1990 issue of PC Thuis Power magazine

Bitfields for input type:
Bit(s)  Description     (Table 03243)
 0      force uppercase
 1      integer
 2      no spaces allowed
 3      no cursor keys
--------l-50000E-----------------------------
INT 50 - PC Thuis Organizer Shell - PLOT CHARACTER
        AX = 000Eh
        BL = character
        BH = attribute
        DH,DL = row,column at which to plot
        DI = window handle
Return: AX = status
            0000h successful
            FFFFh errror
--------l-50000F-----------------------------
INT 50 - PC Thuis Organizer Shell - EMPTY WINDOW
        AX = 000Fh
        BL = character
        BH = attribute
        DI = window handle
--------l-500010-----------------------------
INT 50 - PC Thuis Organizer Shell - TRACE MENU
        AX = 0010h
        ES:BX -> first menu structure
        CL = hotkey to look up
Return: AL = index 1 or FFh if not selected
        AH = index 2 or FFh if not selected
        BL = index 3 or FFh if not selected
        BH = index 4 or FFh if not selected
Index:  hotkeys;PC Thuis Organizer Shell
--------l-500011-----------------------------
INT 50 - PC Thuis Organizer Shell - MOVE MEMORY
        AX = 0011h
        DS:SI -> source
        ES:DI -> destination
        CX = number of bytes to move (0000h = until NUL string terminator???)
SeeAlso: AX=0012h
--------l-500012-----------------------------
INT 50 - PC Thuis Organizer Shell - COMPARE MEMORY
        AX = 0012h
        DS:SI -> source
        ES:DI -> destination
        CX = number of bytes to compare (0000h=until NUL string terminator???)
Return: AX = status
            0000h same
            FFFFh different
SeeAlso: AX=0011h
--------l-500013-----------------------------
INT 50 - PC Thuis Organizer Shell - GET KEY
        AX = 0013h
        CH = type flags
            bit 0: force uppercase
            bit 1: integer
            bit 2: no spaces
Return: AX = keystroke
--------l-500014-----------------------------
INT 50 - PC Thuis Organizer Shell - SCROLL WINDOW
        AX = 0014h
        BL = direction
            06h up
            07h down
        BH = attribute
        DI = window handle
SeeAlso: INT 10/AH=06h,INT 10/AH=07h
--------l-500015-----------------------------
INT 50 - PC Thuis Organizer Shell - GET MEMORY HANDLE
        AX = 0015h
        BL = handle size
            00h 65536 bytes (64K)
            01h 65535 bytes (64K-1)
            02h 32768 bytes (32K)
            03h 32767 bytes (32K-1)
Return: AX = segment
Program: The PC Thuis Organizer Shell was written by John Vanderaart and
          published in the June/July 1990 issue of PC Thuis Power magazine
SeeAlso: INT 21/AH=48h
--------H-51---------------------------------
INT 51 - IRQ1 relocated by DESQview
Range:  INT 51 to INT F9, selected automatically
Note:   this is the default location for older versions; see INT 50"DESQview"
          for details of interrupt relocation
SeeAlso: INT 50"DESQview",INT 54"DESQview",INT 58"DESQview"
--------H-51---------------------------------
INT 51 - IRQ1 relocated by IBM 3278 emulation control program
SeeAlso: INT 50"IBM 3278",INT 54"IBM 3278"
--------H-51---------------------------------
INT 51 - IRQ1 relocated by OS/2 v1.x
SeeAlso: INT 50"OS/2",INT 54"OS/2"
----------51---------------------------------
INT 51 - TI Professional PC - RESTART TIMING EVENT
        AX = timer count in 25ms intervals
        DS:DI -> timing-event table (see #03244)
Note:   documented as "for system use only"; intended for multi-tasking
          software
SeeAlso: INT 50"TI Professional",INT 52"TI Professional"

Format of TI Professional PC timing event table:
Offset  Size    Description     (Table 03244)
 00h    WORD    offset of next event table entry
 02h    BYTE    normally unused (FFh)
 03h    BYTE    flags:
                bit 7 set if timing event active
                bits 6-0 not used by BIOS (0), but could be used by option ROMs
 04h    WORD    timeout count (decremented every 25ms when active)
 06h    WORD    offset of event handler (in segment F400h) to call on event
                  timeout; the F400h segment allows addressing both system ROMs
                  and the first 16K of memory (due to the 1M memory wraparound)
--------b-51---------------------------------
INT 51 - Tandy 2000 - KEYBOARD SERVICES
Note:   this interrupt is identical to INT 16 on Tandy 2000
SeeAlso: INT 16/AH=00h,INT 16/AH=01h,INT 16/AH=02h,INT 16/AH=04h"Tandy"
SeeAlso: INT 16/AH=04h,INT 4A"Tandy 2000",INT 4C"Tandy 2000",INT 52"Tandy 2000"
--------H-52---------------------------------
INT 52 - IRQ2 relocated by DESQview
Range:  INT 52 to INT FA, selected automatically
Note:   this is the default location for older versions; see INT 50"DESQview"
          for details of interrupt relocation
SeeAlso: INT 50"DESQview",INT 54"DESQview",INT 58"DESQview"
--------H-52---------------------------------
INT 52 - IRQ2 relocated by IBM 3278 emulation control program, OS/2 v1.x
SeeAlso: INT 50"IBM 3278",INT 51"OS/2"
----------52---------------------------------
INT 52 - TI Professional PC - CANCEL TIMING EVENT
        DS:DI -> timing-event table (see #03244)
Note:   documented as "for system use only"; intended for multi-tasking
          software
SeeAlso: INT 51"TI Professional",INT 53"TI Professional"
--------b-52---------------------------------
INT 52 - Tandy 2000 - VIDEO SERVICES
Note:   this interrupt is identical to INT 10
SeeAlso: INT 10/AH=00h,INT 10/AH=01h,INT 10/AH=08h,INT 10/AH=0Eh
SeeAlso: INT 4A"Tandy 2000",INT 51"Tandy 2000",INT 53"Tandy 2000"
--------H-53---------------------------------
INT 53 - IRQ3 relocated by DESQview
Range:  INT 53 to INT FB, selected automatically
Note:   this is the default location for older versions; see INT 50"DESQview"
          for details of interrupt relocation
SeeAlso: INT 50"DESQview",INT 54"DESQview",INT 58"DESQview"
--------H-53---------------------------------
INT 53 - IRQ3 relocated by IBM 3278 emulation control program, OS/2 v1.x
SeeAlso: INT 50"IBM 3278",INT 51"OS/2"
----------53---------------------------------
INT 53 - TI Professional PC - SVC INTERFACE
Notes:  documented as "for system use only"; intended for multi-tasking
          software
        this interrupt is not used by the BIOS; the default handler generates
          a system error trap (see INT 51"TI Professional")
SeeAlso: INT 50"TI Professional",INT 54"TI Professional"
--------b-53---------------------------------
INT 53 - Tandy 2000 - SERIAL COMMUNICATIONS
Note:   this interrupt is identical to INT 14 on Tandy 2000
SeeAlso: INT 14/AH=00h"SERIAL",INT 14/AH=01h,INT 14/AH=02h,INT 14/AH=03h
SeeAlso: INT 14/AH=04h"Tandy 2000",INT 52"Tandy 2000",INT 54"Tandy 2000"
--------N-53---------------------------------
INT 53 - WEB??? - API
        BX = function
            0000h ???
                AX = ???
                Return: AX = ???
            0004h ???
            0009h ???
            0015h
                AX = ???
                DX = ???
            0017h
Return: ???
InstallCheck:   check for the signature "WEBCO" immediately prior to the
          interrupt handler
Note:   the above calls are made by Show Partner F/X v3.6 (see INT 10/AH=53h)
Index:  installation check;unknown|installation check;WEBCO
--------H-54---------------------------------
INT 54 - IRQ4 relocated by DESQview
Range:  INT 54 to INT FC, selected automatically
Note:   this is the default location for older versions; see INT 50"DESQview"
          for details of interrupt relocation
SeeAlso: INT 50"DESQview",INT 58"DESQview"
--------H-54---------------------------------
INT 54 - IRQ4 relocated by IBM 3278 emulation control program, OS/2 v1.x
SeeAlso: INT 51"IBM 3278",INT 51"OS/2"
----------54---------------------------------
INT 54 - TI Professional PC - ACTIVATE TASK SUBROUTINE
Notes:  documented as "for system use only"; intended for multi-tasking
          software
        this interrupt is not used by the BIOS; the default handler generates
          a system error trap (see INT 51"TI Professional")
SeeAlso: INT 50"TI Professional",INT 53"TI Professional"
--------b-54---------------------------------
INT 54 - Tandy 2000 - LINE PRINTER
Note:   this interrupt is identical to INT 17 on Tandy 2000
SeeAlso: INT 17/AH=00h,INT 17/AH=01h,INT 17/AH=02h,INT 4A"Tandy 2000"
SeeAlso: INT 53"Tandy 2000",INT 55"Tandy 2000"
--------X-545400-----------------------------
INT 54 U - Toshiba PCMCIA2 - INSTALLATION CHECK
        AX = 5400h
Return: AX = 0054h if installed
            CX:DX -> INT function handler
--------H-55---------------------------------
INT 55 - IRQ5 relocated by DESQview
Range:  INT 55 to INT FD, selected automatically
Note:   this is the default location for older versions; see INT 50"DESQview"
          for details of interrupt relocation
SeeAlso: INT 50"DESQview",INT 58"DESQview"
--------H-55---------------------------------
INT 55 - IRQ5 relocated by IBM 3278 emulation control program, OS/2 v1.x
SeeAlso: INT 51"IBM 3278",INT 51"OS/2"
--------b-55---------------------------------
INT 55 - TI Professional PC - RESERVED FOR FUTURE USE
Notes:  documented as "for system use only"; intended for multi-tasking
          software
        this interrupt is not used by the BIOS; the default handler generates
          a system error trap (see INT 51"TI Professional")
SeeAlso: INT 50"TI Professional",INT 56"TI Professional"
--------b-55---------------------------------
INT 55 - Tandy 2000 - SYSTEM CLOCK
Note:   this interrupt is identical to INT 1A on Tandy 2000
SeeAlso: INT 1A/AH=00h,INT 1A/AH=01h,INT 1A/AH=02h"Tandy 2000"
SeeAlso: INT 1A/AH=03h"Tandy 2000",INT 54"Tandy 2000",INT 56"Tandy 2000"
--------H-56---------------------------------
INT 56 - IRQ6 relocated by DESQview
Range:  INT 56 to INT FE, selected automatically
Note:   this is the default location for older versions; see INT 50"DESQview"
          for details of interrupt relocation
SeeAlso: INT 50"DESQview",INT 58"DESQview"
--------H-56---------------------------------
INT 56 - IRQ6 relocated by IBM 3278 emulation control program, OS/2 v1.x
SeeAlso: INT 51"IBM 3278",INT 51"OS/2"
--------b-56---------------------------------
INT 56 - TI Professional PC - RESERVED FOR FUTURE USE
Notes:  documented as "for system use only"; intended for multi-tasking
          software
        this interrupt is not used by the BIOS; the default handler generates
          a system error trap (see INT 51"TI Professional")
SeeAlso: INT 50"TI Professional",INT 55"TI Professional"
--------b-56---------------------------------
INT 56 - Tandy 2000 - FLOPPY DISK SERVICES
Note:   this interrupt is identical to INT 13 on Tandy 2000
SeeAlso: INT 13/AH=00h,INT 13/AH=01h,INT 13/AH=02h,INT 13/AH=03h
SeeAlso: INT 4A"Tandy 2000",INT 51"Tandy 2000",INT 55"Tandy 2000"
--------H-57---------------------------------
INT 57 - IRQ7 relocated by DESQview
Range:  INT 57 to INT FF, selected automatically
Note:   this is the default location for older versions; see INT 50"DESQview"
          for details of interrupt relocation
SeeAlso: INT 50"DESQview",INT 58"DESQview"
--------H-57---------------------------------
INT 57 - IRQ7 relocated by IBM 3278 emulation control program, OS/2 v1.x
SeeAlso: INT 51"IBM 3278",INT 51"OS/2"
--------b-57---------------------------------
INT 57 C - TI Professional PC - CRT MAPPING HOOK
        AX/BX/CX/DX/BP/SI/DI same as on entry to CRT subroutine (e.g. INT 49)
        DS = BIOS system segment
        ES = DE00h
Return: DF/IF flags must be preserved
        ES,DS,BP preserved
        AX,BX,CX,DX,SI,DI may be changed as necessary to modify the original
          call
Desc:   hooking this vector permits programs to intercept or modify all
          screen output, including both application calls to INT 49 and
          calls generated internally by the BIOS which bypass INT 49
Note:   by default, this vector points at an IRET instruction
SeeAlso: INT 49/AH=01h"TI",INT 50"TI Professional"
--------H-58---------------------------------
INT 58 - IRQ8 relocated by DESQview 2.26+
Range:  INT 58 to INT F8, selected automatically
Note:   this is the default, but other INTs may be used (see INT 50"DESQview")
SeeAlso: INT 50"DESQview",INT 59"DESQview",INT 70
--------H-58---------------------------------
INT 58 - IRQ0 relocated by DoubleDOS
SeeAlso: INT 08
--------b-58---------------------------------
INT 58 C - TI Professional PC - SYSTEM TIMER 25ms HOOK
Desc:   called from the hardware timer tick interrupt, after executing the
          first four BIOS timing events, updating the system clock, invoking
          INT 5A if required, saving registers, and switching to a temporary
          stack (the one reserved for IRQ3)
Notes:  the handler for this interrupt may destroy AX,BX,DI,ES but must
          preserve all other registers; 8 WORDs of stack space are available,
          of which at most 4 may be used if the handler enables interrupts
        if the handler switches stacks (because more than 4/8 WORDs are
          required), the original stack must be restored before chaining to
          the previous handler
SeeAlso: INT 43"TI Professional",INT 4C"TI Professional"
SeeAlso: INT 5A"TI Professional"
--------H-59---------------------------------
INT 59 - IRQ9 relocated by DESQview 2.26+
Range:  INT 59 to INT F9, selected automatically
Note:   this is the default, but other INTs may be used (see INT 50"DESQview")
SeeAlso: INT 50"DESQview",INT 58"DESQview",INT 5A"DESQview",INT 71
--------H-59---------------------------------
INT 59 - IRQ1 relocated by DoubleDOS
SeeAlso: INT 09
--------b-59---------------------------------
INT 59 - TI Professional PC - COMMON ROM HARDWARE INTERRUPT EXIT VECTOR
Desc:   all hardware interrupts on the TI Pro jump indirectly to the handler
          pointed at by this interrupt vector to finish their handling of
          the hardware interrupt
Notes:  the default handler decrements the interrupt count, restores registers
          (including the stack pointer), sends an EOI to the interrupt
          controller, and finally does an IRET
        can be used by multitaskers which need to get control after every
          hardware interrupt
SeeAlso: INT 40"TI Professional",INT 47"TI Professional"
SeeAlso: INT 53"TI Professional"
--------V-59---------------------------------
INT 59 - GSS Computer Graphics Interface (GSS*CGI)
        DS:DX -> block of 5 array pointers
Return: CF set on error
            AX = error code
        CF clear if successful
            AX = return code
Note:   INT 59 is the means by which GSS*CGI language bindings communicate with
          GSS*CGI device drivers and the GSS*CGI device driver controller.
        also used by the IBM Graphic Development Toolkit
--------H-5A---------------------------------
INT 5A - IRQ10 relocated by DESQview 2.26+
Range:  INT 5A to INT FA, selected automatically
Note:   this is the default, but other INTs may be used (see INT 50"DESQview")
SeeAlso: INT 50"DESQview",INT 59"DESQview",INT 5B"DESQview",INT 72
--------H-5A---------------------------------
INT 5A - IRQ2 relocated by DoubleDOS
SeeAlso: INT 0A"IRQ2"
--------N-5A---------------------------------
INT 5A - PC Cluster adapter BIOS entry address
        ???
Return: ???
SeeAlso: INT 5B"PC Cluster"
--------b-5A---------------------------------
INT 5A - TI Professional PC - SYSTEM TIMER 100ms HOOK
Desc:   called from the hardware timer tick interrupt, after executing the
          first four BIOS timing events, updating the system clock, saving
          registers, and switching to a temporary stack (the one reserved
          for IRQ3), but before calling INT 58
        no details available
Notes:  this interrupt is invoked on every fourth timer interrupt
        the handler for this interrupt may destroy AX,BX,DI,ES but must
          preserve all other registers; 8 WORDs of stack space are available,
          of which at most 4 may be used if the handler enables interrupts
        if the handler switches stacks (because more than 4/8 WORDs are
          required), the original stack must be restored before chaining to
          the previous handler
SeeAlso: INT 43"TI Professional",INT 4C"TI Professional"
SeeAlso: INT 58"TI Professional"
--------H-5B---------------------------------
INT 5B - IRQ11 relocated by DESQview 2.26+
Range:  INT 5B to INT FB, selected automatically
Note:   this is the default, but other INTs may be used (see INT 50"DESQview")
SeeAlso: INT 50"DESQview",INT 5A"DESQview",INT 5C"DESQview",INT 73
--------H-5B---------------------------------
INT 5B - IRQ3 relocated by DoubleDOS
SeeAlso: INT 0B
--------N-5B---------------------------------
INT 5B - PC cluster adapter - RELOCATED INT 19
SeeAlso: INT 19,INT 5A"PC Cluster"
--------N-5B---------------------------------
INT 5B - AT&T Starlan Extended NetBIOS (variable length names)
        ES:BX -> Network Control Block (see #03245)
Return: AL = status (see #03248)
SeeAlso: INT 5C"NetBIOS"

Format of Starlan Network Control Block:
Offset  Size    Description     (Table 03245)
 00h    BYTE    ncb_command (see also #03250)
                70h send net Break
 01h    BYTE    ncb_retcode
 02h    BYTE    ncb_lsn
 03h    BYTE    ncb_num
 04h    DWORD   -> ncb_buffer
 08h    WORD    ncb_length
 0Ah 16 BYTEs   ncb_callname
 1Ah 16 BYTEs   ncb_name
 2Ah    BYTE    ncb_rto
 2Bh    BYTE    ncb_sto
 2Ch    DWORD   -> ncb_post     /* int (far *ncb_post)(); */
 30h    BYTE    ncb_lana_num
 31h    BYTE    ncb_cmd_cplt
 32h    DWORD   -> ncb_vname
 36h    BYTE    ncb_vnamelen
 37h  9 BYTEs   ncb_reserve
Note:   fields 00h-31h are the same as for a standard NetBIOS NCB (see #03249)
--------N-5B---------------------------------
INT 5B - Microsoft Network Transport Layer Interface
Note:   used by MS-NET for executing network commands
SeeAlso: INT 5C"NetBIOS"
--------N-5B---------------------------------
INT 5B - used by Alloy NTNX
--------N-5B---------------------------------
INT 5B - ISOLAN Multi Protocol Software
        ES:BX -> Transfer Control Block (see #03246)
Return: AL = status
Note:   this software interface allows multiple protocols/software packages
          to access a BICC 411x network card

Format of ISOLAN Transfer Control Block:
Offset  Type    Description     (Table 03246)
 00h    BYTE    command code
                B3h Status
                F2h Activate
                F3h Deactivate
                F4h Send Data
 01h    BYTE    command identity
 02h    BYTE    virtual circuit ID
 03h    WORD    buffer length
 05h    DWORD   buffer pointer
 09h    BYTE    expedited data flag
 0Ah    BYTE    cancelable flag
 0Bh 16 BYTEs   local network address
 1Bh 16 BYTEs   remote network address
 2Bh    DWORD   asynchronous notification routine
 30h    DWORD   local network number
 34h    DWORD   remote network number
 38h    BYTE    call timeout
 39h    BYTE    not used
 3Ah  8 BYTEs   reserved
 42h    BYTE    command code extension
 43h    WORD    Blue Book MAC type
--------b-5B---------------------------------
INT 5B C - TI Professional PC - KEYBOARD MAPPING HOOK
        CF set
        AH = shift state (see #03247)
        AL = scan code (see #03214)
Return: BX, CX, DI, ES may be destroyed
        various return methods are supported:
            IRET, AX unchanged: process keystroke normally
            IRET, AL = FFh: discard keystroke
            IRET, AX changed: process modified keystroke
            chain to old INT 5B: allow other handlers to look at (possibly
                  modified) keystroke in AX
            RETF 2, CF clear: place returned AX into keyboard buffer without
                  any further processing
Notes:  invoked by the keyboard ISR, and used to remap the keyboard
        if CF is clear on entry, some other handler has processed the
          keystroke and the current handler should not modify it, instead
          performing a RETF 2 or IRET (after clearing CF on the stack)
        when requesting that a value be placed directly into the keyboard
          buffer, AL and AH may not *both* be nonzero (the TI does not
          return scan codes as part of the key code for non-extended keys)
SeeAlso: INT 15/AH=4Fh,INT 4A/AH=00h"TI",INT 59"TI Professional"
SeeAlso: INT 5C"TI Professional",INT 5D"TI Professional"
SeeAlso: INT 5E"TI Professional",INT 5F"TI Professional"

Bitfields for TI Professional PC keyboard mapping hook shift states:
Bit(s)  Description     (Table 03247)
 7      CAPS LOCK is on
 6-4    reserved (0)
 3      repeated key
 2      Shift is pressed
 1      Alt is pressed
 0      Ctrl is pressed
--------U-5B5254DL04-------------------------
INT 5B U - SitBack v3.02R - GET ???
        AX = 5254h
        DL = 04h
Return: ES:BX -> ??? in resident portion
Program: SitBack is a background file backup utility by SitBack Technologies,
          Inc. which initiates backups whenever the system is idle
SeeAlso: AX=8485h/DL=71h,AX=8485h/DL=72h
--------U-5B8485DL70-------------------------
INT 5B U - SitBack v3.02R - INSTALLATION CHECK
        AX = 8485h
        DL = 70h
Return: CX = 8485h if installed
            DX:AX -> ??? (configuration data?)
Program: SitBack is a background file backup utility by SitBack Technologies,
          Inc. which initiates backups whenever the system is idle
SeeAlso: AX=5254h/DL=04h,AX=8485h/DL=78h
--------U-5B8485DL71-------------------------
INT 5B U - SitBack v3.02R - SET ??? FLAG AND GET ??? ADDRESS
        AX = 8485h
        DL = 71h
Return: ES:BX -> FAR entry point to ???
Note:   the flag which is modified is located at the address returned by
           AX=5254h/DL=04h
SeeAlso: AX=8485h/DL=72h
--------U-5B8485DL72-------------------------
INT 5B U - SitBack v3.02R - CLEAR ??? FLAG
        AX = 8485h
        DL = 72h
Note:   the flag which is modified is located at the address returned by
           AX=5254h/DL=04h
SeeAlso: AX=8485h/DL=71h
--------U-5B8485DL73-------------------------
INT 5B U - SitBack v3.02R - ???
        AX = 8485h
        DL = 73h
        ???
Return: ???
--------U-5B8485DL74-------------------------
INT 5B U - SitBack v3.02R - ???
        AX = 8485h
        DL = 74h
        ???
Return: ???
--------U-5B8485DL75-------------------------
INT 5B U - SitBack v3.02R - ???
        AX = 8485h
        DL = 75h
        CX = ???
Return: ???
SeeAlso: AX=8485h/DL=76h
--------U-5B8485DL76-------------------------
INT 5B U - SitBack v3.02R - ???
        AX = 8485h
        DL = 76h
        CX = ???
Return: ???
Note:   conditionally calls the code for AX=8485h/DL=75h
SeeAlso: AX=8485h/DL=75h
--------U-5B8485DL77-------------------------
INT 5B U - SitBack v3.02R - SET ??? FLAG
        AX = 8485h
        DL = 77h
--------U-5B8485DL78-------------------------
INT 5B U - SitBack v3.02R - GET RESIDENT DATA SEGMENT
        AX = 8485h
        DL = 78h
Return: CX = 5342h if supported
            ES = AX = segment of TSR data
SeeAlso: AX=8485h/DL=70h,AX=8485h/DL=79h
--------U-5B8485DL79-------------------------
INT 5B U - SitBack v3.02R - GET DTA
        AX = 8485h
        DL = 79h
Return: CX = 5342h if supported
            ES:BX -> DTA set by last INT 21/AH=1Ah
Note:   this function is provided by SBOS.EXE rather than SB.EXE
SeeAlso: INT 21/AH=1Ah
--------U-5B8485DL7A-------------------------
INT 5B U - SitBack v3.02R - TOGGLE ???
        AX = 8485h
        DL = 7Ah
Return: CX = 5342h if supported
            AL = new value of ??? (00h or 01h)
--------N-5C---------------------------------
INT 5C - NetBIOS INTERFACE
        ES:BX -> network control block (NCB) (see #03249)
Return: AL = status (see #03248)
Program: NetBIOS was developed by Sytek, Inc. in 1984 as a high-level
          programming interface to the IBM PC Network; the first implementation
          was a ROM BIOS extension on Sytek's PCnet LAN adapter card, but many
          current networks support NetBIOS as the session layer.
Note:   The Sytek PCnet card uses DMA 3.
SeeAlso: INT 2A/AH=01h,INT 2A/AH=04h,INT 5B"Extended NetBIOS"

(Table 03248)
Values for NetBIOS status:
 00h    successful
 01h    bad buffer size
 03h    invalid NETBIOS command
 05h    timeout
 06h    receive buffer too small
 07h    No-ACK command failed
 08h    bad session number
 09h    LAN card out of memory
 0Ah    session closed
 0Bh    command has been cancelled
 0Dh    name already exists
 0Eh    local name table full
 0Fh    name still in use, can't delete
 11h    local session table full
 12h    remote PC not listening
 13h    bad NCB_NUM field
 14h    no answer to CALL or no such remote
 15h    name not in local name table
 16h    duplicate name
 17h    bad delete
 18h    abnormal end
 19h    name error, multiple identical names in use
 1Ah    bad packet
 21h    network card busy
 22h    too many commands queued
 23h    bad LAN card number
 24h    command finished while cancelling
 26h    command can't be cancelled
 30h    name defined by another process (OS/2)
 34h    NetBIOS environment not defined, must issue reset (OS/2)
 35h    required operating system resources exhausted (OS/2)
 36h    maximum applications exceeded (OS/2)
 37h    no SAPs available for NetBIOS (OS/2)
 38h    requested resources not available (OS/2)
 40h    Lana System Error
 41h    Lana Remote Hot Carrier
 42h    Lana Local Hot Carrier
 43h    Lana No Carrier Detected
 44h    unusual network condition
 45h-4Dh hardware error
 4Eh    token ring is broken
 4Fh    token ring error
 50h    adapter malfunction
 F7h    error in explicit INITIALIZE
 F8h    error in implicit OPEN
 F9h    TOKREUI internal error
 FAh    hardware adapter testing
 FBh    NetBIOS emulator not found
 FCh    OPEN or OPEN_SAP failure
 FDh    unexpected adapter closure
 FFh    NetBIOS busy (command pending)

Format of NetBIOS Network Control Block:
Offset  Size    Description     (Table 03249)
 00h    BYTE    command code (see #03250)
 01h    BYTE    return code (see #03248)
 02h    BYTE    local session number (LSN)
 03h    BYTE    "ncb_num" datagram table entry from ADD NAME
 04h    DWORD   -> I/O buffer
 08h    WORD    length of data in buffer
 0Ah 16 BYTEs   remote system to call
 1Ah 16 BYTEs   network name of local machine
 2Ah    BYTE    receive timeout in 1/2 seconds
 2Bh    BYTE    send timeout in 1/2 seconds
 2Ch    DWORD   -> FAR post handler     /* int (far *ncb_post)(); */
 30h    BYTE    network adapter number on which to execute command
                00h-03h IBM NetBIOS specs
                F0h-FFh Eicon NABios interface (see also INT 7B"Eicon")
 31h    BYTE    command completion code (see #03248)
 32h 14 BYTEs   reserved for network card

(Table 03250)
Values for NetBIOS command code field in NCB:
 10h    start session with NCB_NAME name (call)
 11h    listen for call
 12h    end session with NCB_NAME name (hangup)
 14h    send data via NCB_LSN
 15h    receive data from a session
 16h    receive data from any session
 17h    send multiple data buffers
 20h    send unACKed message (datagram)
 21h    receive datagram
 22h    send broadcast datagram
 23h    receive broadcast datagram
 30h    add name to name table
 31h    delete name from name table
 32h    reset adapter card and tables
 33h    get adapter status (see #03251)
 34h    status of all sessions for name (see #03253)
 35h    cancel
 36h    add group name to name table
 48h    send data and receive data (LAN Manager NETBEUI.DOS)
 70h    unlink from IBM remote program (no F0h function)
 71h    send data without ACK
 72h    send multiple buffers without ACK
 72h    UngermannBass Register (conflicts with above function)
 73h    UngermannBass SendNmc
 74h    UngermannBass Callniu
 75h    UngermannBass Calladdr
 76h    UngermannBass Listenaddr
 77h    UngermannBass SendPkt
 78h    find name
 78h    UngermannBass RcvPkt (conflicts with above function)
 79h    token-ring protocol trace
 79h    UngermannBass SendAttn (conflicts with above function)
 7Ah    UngermannBass RcvAttn
 7Bh    UngermannBass Listenniu
 7Ch    UngermannBass RcvRaw
 7Dh    UngermannBass SendNmc2
 7Fh    Beame&Whiteside BWNB installation check (returns with return code and
          completion code both set to 03h, while invalid functions return only
          return code field set to 03h)
Note:   OR any of the above except 70h with 80h for non-waiting call

Format of NetBIOS structure "astatus":
Offset  Size    Description     (Table 03251)
 00h  6 BYTEs as_id
 06h    BYTE  as_jumpers
 07h    BYTE  as_post
 08h    BYTE  as_major
 09h    BYTE  as_minor
 0Ah    WORD  as_interval
 0Ch    WORD  as_crcerr
 0Eh    WORD  as_algerr
 10h    WORD  as_colerr
 12h    WORD  as_abterr
 14h    DWORD as_tcount
 18h    DWORD as_rcount
 1Ch    WORD  as_retran
 1Eh    WORD  as_xresrc
 20h  8 BYTEs as_res0
 28h    WORD  as_ncbfree
 2Ah    WORD  as_ncbmax
 2Ch    WORD  as_ncbx
 2Eh  4 BYTEs as_res1
 32h    WORD  as_sespend
 34h    WORD  as_msp
 36h    WORD  as_sesmax
 38h    WORD  as_bufsize
 3Ah    WORD  as_names
 3Ch 16 name structures  as_name (see #03252)
Note:   it has been reported that the first field should be 16 bytes instead
          of six (shifthing all remaining fields by ten bytes)

Format of NetBIOS structure "name":
Offset  Size    Description     (Table 03252)
 00h 16 BYTEs "nm_name" symbolic name
 10h    BYTE  "nm_num" number associated with name
 11h    BYTE  nm_status

Format of NetBIOS structure "sstatus":
Offset  Size    Description     (Table 03253)
 00h    BYTE    number of sessions being reported
 01h    BYTE    number of sessions with this name
 02h    BYTE    number of outstanding receive datagrams
 03h    BYTE    number of outstanding ReceiveAnys
 04h    var     session structures (see #03254)

Format of NetBIOS structure "session":
Offset  Size    Description     (Table 03254)
 00h    BYTE    local session number
 01h    BYTE    state
                01h listen pending
                02h call pending
                03h session established
                04h hangup pending
                05h hangup done
                06h session aborted
 02h 16 BYTEs   local name
 12h 16 BYTEs   remote name
 22h    BYTE    number of outstanding receives
 23h    BYTE    number of outstanding sends/chainsends
--------H-5C---------------------------------
INT 5C - IRQ12 relocated by DESQview 2.26+
Range:  INT 5C to INT FC, selected automatically
Note:   this is the default, but other INTs may be used (see INT 50"DESQview")
SeeAlso: INT 50"DESQview",INT 5B"DESQview",INT 5D"DESQview",INT 74
--------H-5C---------------------------------
INT 5C - IRQ4 relocated by DoubleDOS
SeeAlso: INT 0C
--------N-5C---------------------------------
INT 5C - TOPS INTERFACE
        ES:BX -> Network Control Block
Note:   TOPS card uses DMA 1, 3 or none.
--------N-5C---------------------------------
INT 5C - ATALK.SYS - AppleTalk INTERFACE
        DX:BX -> control block (see #03256)
Return: none
InstallCheck:   test for the signature "AppleTalk" 16 bytes prior to the
          interrupt handler
Range:  INT 5Ch to INT 70h
Index:  installation check;ATALK.SYS|installation check;AppleTalk interface

(Table 03255)
Values for ATALK.SYS command code:
 01h    "AT_INIT"           initialize the driver
 02h    "AT_KILL"
 03h    "AT_GETNETINFO" get current network info incl init status
 04h    "AT_GETCLOCKTICKS"
 05h    "AT_STARTTIMER"
 06h    "AT_RESETTIMER"
 07h    "AT_CANCELTIMER"
 10h    "LAP_INSTALL"
 11h    "LAP_REMOVE"
 12h    "LAP_WRITE"
 13h    "LAP_READ"
 14h    "LAP_CANCEL"
 20h    "DDP_OPENSOCKET"
 21h    "DDP_CLOSESOCKET"
 22h    "DDP_WRITE"
 23h    "DDP_READ"
 24h    "DDP_CANCEL"
 30h    "NBP_REGISTER"
 31h    "NBP_REMOVE"
 32h    "NBP_LOOKUP"
 33h    "NBP_CONFIRM"
 34h    "NBP_CANCEL"
 35h    "ZIP_GETZONELIST"
 36h    "ZIP_GETMYZONE"
 37h    "ZIP_TAKEDOWN"
 38h    "ZIP_BRINGUP"
 40h    "ATP_OPENSOCKET"
 41h    "ATP_CLOSESOCKET"
 42h    "ATP_SENDREQUEST"
 43h    "ATP_GETREQUEST"
 44h    "ATP_SENDRESPONSE"
 45h    "ATP_ADDRESPONSE"
 46h    "ATP_CANCELTRANS"
 47h    "ATP_CANCELRESPONSE"
 48h    "ATP_CANCELREQUEST"
 50h    "ASP_GETPARMS"
 51h    "ASP_CLOSESESSION"
 52h    "ASP_CANCEL"
 53h    "ASP_INIT"
 54h    "ASP_KILL"
 55h    "ASP_GETSESSION"
 56h    "ASP_GETREQUEST"
 57h    "ASP_CMDREPLY"
 58h    "ASP_WRTCONTINUE"
 59h    "ASP_WRTREPLY"
 5Ah    "ASP_CLOSEREPLY"
 5Bh    "ASP_NEWSTATUS"
 5Ch    "ASP_ATTENTION"
 5Dh    "ASP_GETSTATUS"
 5Eh    "ASP_OPENSESSION"
 5Fh    "ASP_COMMAND"
 60h    "ASP_WRITE"
 61h    "ASP_GETATTENTION"
 70h    "PAP_OPEN"
 71h    "PAP_CLOSE"
 72h    "PAP_READ"
 73h    "PAP_WRITE"
 74h    "PAP_STATUS"
 75h    "PAP_REGNAME"
 76h    "PAP_REMNAME"
 77h    "PAP_INIT"
 78h    "PAP_NEWSTATUS"
 79h    "PAP_GETNEXTJOB"
 7Ah    "PAP_KILL"
 7Bh    "PAP_CANCEL"

Format of AppleTalk control block:
Offset  Size    Description     (Table 03256)
 00h    WORD    command code (see #03255)
                OR with the following flags
                8000h start command then return
                4000h wait for interrupt service to complete
 02h    WORD    returned status
                0000h success (already initialized if func 01h)
 04h    DWORD   pointer to completion function
 08h    WORD    network number
 0Ah    BYTE    node ID
---if general func (01h,03h), control block continues:
 0Bh    BYTE    "inf_abridge"
 0Ch    WORD    "inf_config"
 0Eh    DWORD   pointer to buffer
 12h    WORD    buffer size
---if DDP function (20h-24h), control block continues:
 0Bh    BYTE    "ddp_addr_socket"
 0Ch    BYTE    "ddp_socket"
 0Dh    BYTE    "ddp_type"
 0Eh    DWORD   pointer to buffer
 12h    WORD    buffer size
 14h    BYTE    "ddp_chksum"
---if Name Binding Protocol (30h-34h), control block continues:
 0Bh    BYTE    "nbp_addr_socket"
 0Ch    WORD    "nbp_toget"
 0Eh    DWORD   pointer to buffer (see #03257)
 12h    WORD    buffer size
 14h    BYTE    "nbp_interval"
 15h    BYTE    "nbp_retry"
 16h    DWORD   "nbp_entptr"
---if AppleTalk Transaction Protocol (42h), control block continues:
 0Bh    BYTE    "atp_addr_socket"
 0Ch    WORD    "atp_socket"
 0Eh    DWORD   pointer to buffer
 12h    WORD    buffer size
 14h    BYTE    "atp_interval"
 15h    BYTE    "atp_retry"
 16h    BYTE    ATP flags
                bit 5: exactly one transaction
 17h    BYTE    "atp_seqbit"
 18h    BYTE    transaction ID
 19h  4 BYTEs   ATP user bytes
 1Dh    BYTE    number of BDS buffers
 1Eh    BYTE    number of BDS responses
 1Fh    DWORD   pointer to BDS buffers (see #03258)

Format of Name Binding Protocol Name-to-Address binding entries for NBP_LOOKUP:
Offset  Size    Description     (Table 03257)
 00h    WORD    "tup_address_network"
 02h    BYTE    "tup_address_notid"
 03h    BYTE    "tup_address_socket"
 04h    BYTE    "tup_enum"
 05h 99 BYTEs   name

Format of BDS entries:
Offset  Size    Description     (Table 03258)
 00h    DWORD   pointer to buffer
 04h    WORD    size of buffer
 06h    WORD    BDS data size
 08h  4 BYTEs   "bds_userbytes"
--------N-5C---------------------------------
INT 5C - IBM 802.2 INTERFACE (LLC)
        ES:BX -> CCB (see #03259)
Return: none

Format of IBM 802.2 CCB:
Offset  Size    Description     (Table 03259)
 00h    BYTE    adapter
 01h    BYTE    command code
 02h    BYTE    return code
 03h    BYTE    work
 04h    DWORD   pointer to ???
 08h    DWORD   pointer to completion function???
 0Ch    DWORD   pointer to parameters???
--------N-5C---------------------------------
INT 5C - $25 LAN - INSTALLATION CHECK
Notes:  current versions only check whether the vector is 0000h:0000h or not
        future versions are supposed to have the signature "NET" in the three
          bytes preceding the INT 5C handler
--------b-5C0100-----------------------------
INT 5C C - TI Professional PC - KEYBOARD PAUSE KEY VECTOR
        AX = 0100h
        CF clear
Return: CF clear
            AX = keystroke to be placed into keyboard buffer
        CF set
            AX ignored
Desc:   toggle a pause flag which is checked by the CRT Device Service Routine
          (see INT 49/AH=01h"TI") and causes it to temporarily halt the
          machine on the next video-related function (until a key is pressed)
SeeAlso: INT 09"IRQ1",INT 4A/AH=00h"TI",INT 59"TI Professional"
SeeAlso: INT 5B"TI Professional",INT 5D"TI Professional"
SeeAlso: INT 5E"TI Professional",INT 5F"TI Professional"
--------N-5C04-------------------------------
INT 5C - $25 LAN - CHECK IF CONNECTION ALIVE
        AH = 04h
        AL = COM port (0 = default)
        CX = wait count in character times (should be at least 100)
Return: ZF set if link alive
--------H-5D---------------------------------
INT 5D - IRQ13 relocated by DESQview 2.26+
Range:  INT 5D to INT FD, selected automatically
Note:   this is the default, but other INTs may be used (see INT 50"DESQview")
SeeAlso: INT 50"DESQview",INT 5C"DESQview",INT 5E"DESQview",INT 75
--------H-5D---------------------------------
INT 5D - IRQ5 relocated by DoubleDOS
SeeAlso: INT 0D"IRQ5",INT 5C"DoubleDOS"
--------b-5D---------------------------------
INT 5D C - TI Professional PC - KEYBOARD BREAK KEY VECTOR
        CF clear
        AX = 0000h
Return: CF clear
            AX = keystroke to place into keyboard buffer
        CF set
            AX ignored
Desc:   invoked by the keyboard ISR when Shift-BrkPause is pressed
Note:   the default handler is a simple IRET instruction
SeeAlso: INT 09"IRQ1",INT 4A/AH=00h"TI",INT 59"TI Professional"
SeeAlso: INT 5B"TI Professional",INT 5C"TI Professional"
SeeAlso: INT 5E"TI Professional",INT 5F"TI Professional"
--------H-5E---------------------------------
INT 5E - IRQ14 relocated by DESQview 2.26+
Range:  INT 5E to INT FE, selected automatically
Note:   this is the default, but other INTs may be used (see INT 50"DESQview")
SeeAlso: INT 50"DESQview",INT 5D"DESQview",INT 5F"DESQview",INT 76
--------H-5E---------------------------------
INT 5E - IRQ6 relocated by DoubleDOS
SeeAlso: INT 0E,INT 5D"DoubleDOS"
--------b-5E---------------------------------
INT 5E C - TI Professional PC - KEYBOARD PRINT-SCREEN VECTOR
        CF set
Return: CF clear
            AX = keystroke to be placed into keyboard buffer
        CF set
            AX ignored
Desc:   hook to dump the screen to the printer
Notes:  hooked by TI MS-DOS, which provides a PRTSCRN character device which
          can invoke screen prints when a decimal digit (indicating the type
          of screen dump) is written to it
        the TI MS-DOS print-screen routine allows selective dumps of text
          only, graphics only, or text and graphics superimposed, in either
          normal or reverse, by pressing the appropriate keystroke combination:
          Shift-Print, Ctrl-Print, Alt-Print, Shift-Alt-Print, Ctrl-Alt-Print,
          or Shift-Ctrl-Print.
        the BIOS default routine for this vector is an IRET
SeeAlso: INT 05"PRINT SCREEN",INT 4A/AH=00h"TI",INT 59"TI Professional"
SeeAlso: INT 5B"TI Professional",INT 5C"TI Professional"
SeeAlso: INT 5D"TI Professional",INT 5F"TI Professional"
--------H-5F---------------------------------
INT 5F - IRQ15 relocated by DESQview 2.26+
Range:  INT 5F to INT FF, selected automatically
Note:   this is the default, but other INTs may be used (see INT 50"DESQview")
SeeAlso: INT 50"DESQview",INT 5E"DESQview",INT 77
--------H-5F---------------------------------
INT 5F - IRQ7 relocated by DoubleDOS
SeeAlso: INT 0F,INT 5E"DoubleDOS"
--------b-5F---------------------------------
INT 5F C - TI Professional PC - KEYBOARD QUEUEING VECTOR
Return: all registers preserved
Desc:   hook for multitaskers to be informed when a keypress is placed in the
          keyboard buffer
Note:   the default handler is a simple IRET instruction
SeeAlso: INT 09,INT 4A/AH=00h"TI",INT 59"TI Professional"
SeeAlso: INT 5B"TI Professional",INT 5C"TI Professional"
SeeAlso: INT 5D"TI Professional",INT 5E"TI Professional"
--------b-5F00-------------------------------
INT 5F - HP 95LX/100LX/200LX GRAPHICS PRIMITIVES - SET VIDEO MODE
        AH = 00h
        AL = video mode
            03h text,CGA color (100LX/200LX)
            06h 640x200 CGA graphics (100LX/200LX)
            07h text, system manager compliant
            20h 240x128 mono graphics, system manager compliant
            87h text, not system manager compliant
            A0h 240x128 mono graphics, not system manager compliant
Notes:  the defaults after setting the mode to graphics are (0,0) logical
          origin, full-screen clip region, (0,0) pen location, pen color 1,
          pixel replacement FORCE, line type and fill mask all bits set
        modes 03h and 06h can also be set with the standard INT 10/AH=00h
SeeAlso: INT 0F"HP 95LX",INT 10/AH=00h,INT 15/AX=4DD4h
--------b-5F01-------------------------------
INT 5F - HP 95LX/100LX/200LX GRAPHICS PRIMITIVES - SET FILL MASK
        AH = 01h
        ES:DI -> 8-byte fill mask
Note:   the fill mask represents an 8x8 pixel box and is repeated as necessary
          when drawing filled rectangles; it is always aligned with the byte
          boundaries of video memory, regardless of the actual boundaries of
          the rectangle
SeeAlso: AH=02h
--------b-5F02-------------------------------
INT 5F - HP 95LX/100LX/200LX GRAPHICS PRIMITIVES - GET CURRENT GRAPHICS INFO
        AH = 02h
        ES:DI -> graphics info record (see #03260)
Return: DX:AX -> filled graphics info record (for return to high-level langs)

Format of HP 95LX graphics info record:
Offset  Size    Description     (Table 03260)
 00h    BYTE    current video mode
 01h    BYTE    default video mode
 02h    WORD    display width in pixels
 04h    WORD    display height in pixels
 06h    WORD    current pen column
 08h    WORD    current pen row
 0Ah    WORD    current line type
 0Ch    WORD    current replacement rule
 0Eh    WORD    current pen color
 10h    WORD    current leftmost column of clip region
 12h    WORD    current rightmost column of clip region
 14h    WORD    current topmost row of clip region
 16h    WORD    current bottommost row of clip region
 18h    WORD    current column of logical origin
 1Ah    WORD    current row of logical origin
 1Ch  8 BYTEs   current fill mask
--------b-5F03-------------------------------
INT 5F - HP 95LX/100LX/200LX GRAPHICS PRIMITIVES - SET LOGICAL ORIGIN
        AH = 03h
        CX = column
        DX = row
SeeAlso: AH=04h
--------b-5F04-------------------------------
INT 5F - HP 95LX/100LX/200LX GRAPHICS PRIMITIVES - SET CLIP REGION
        AH = 04h
        CX = left-most column
        DX = top-most row
        SI = right-most column
        DI = bottom-most row
SeeAlso: AH=03h
--------b-5F05-------------------------------
INT 5F - HP 95LX/100LX/200LX GRAPHICS PRIMITIVES - DRAW RECTANGLE
        AH = 05h
        AL = fill type
            00h outline, using current line type and color
            01h solid, using current color
            02h pattern, using current fill mask and color
        DX,CX = row,column of other corner of rectangle
Note:   the rectangle is drawn starting at the current pen position
SeeAlso: AH=01h,AH=06h,AH=07h
--------b-5F06-------------------------------
INT 5F - HP 95LX/100LX/200LX GRAPHICS PRIMITIVES - DRAW LINE
        AH = 06h
        DX,CX = row,column of end point
Note:   the line is drawn starting at the current pen position
SeeAlso: AH=05h,AH=07h
--------b-5F07-------------------------------
INT 5F - HP 95LX/100LX/200LX GRAPHICS PRIMITIVES - PLOT POINT
        AH = 07h
        DX,CX = row,column of point
Note:   also sets pen position to the specified point
SeeAlso: AH=06h,AH=08h,AH=0Ch
--------b-5F08-------------------------------
INT 5F - HP 95LX/100LX/200LX GRAPHICS PRIMITIVES - MOVE PEN
        AH = 08h
        DX,CX = row,column of new pen position
SeeAlso: AH=07h,AH=09h
--------b-5F09-------------------------------
INT 5F - HP 95LX/100LX/200LX GRAPHICS PRIMITIVES - SET PEN COLOR
        AH = 09h
        AL = new color (00h = white, 01h = black)
SeeAlso: AH=08h,AH=0Ah,AH=0Bh
--------b-5F0A-------------------------------
INT 5F - HP 95LX/100LX/200LX GRAPHICS PRIMITIVES - SET REPLACEMENT RULE
        AH = 0Ah
        AL = new replacement rule
            00h force
            01h AND
            02h OR
            03h XOR
            ---100LX/200LX---
            04h InvForce
            05h InvAND
            06h InvOR
            07h InvXOR
            08h Txt
SeeAlso: AH=01h,AH=09h,AH=0Bh
--------b-5F0B-------------------------------
INT 5F - HP 95LX/100LX/200LX GRAPHICS PRIMITIVES - SET LINE TYPE
        AH = 0Bh
        CX = new line type
Note:   the line type specifies 16 bits which are repeated over and over while
          drawing the pixels of a line
SeeAlso: AH=09h,AH=0Ah
--------b-5F0C-------------------------------
INT 5F - HP 95LX/100LX/200LX GRAPHICS PRIMITIVES - GET PIXEL
        AH = 0Ch
        DX,CX = row,column of pixel to read
Return: AX = pixel color
SeeAlso: AH=07h
--------b-5F0D-------------------------------
INT 5F - HP 95LX/100LX/200LX GRAPHICS PRIMITIVES - GET IMAGE
        AH = 0Dh
        DX,CX = row,column of first corner
        BP,SI = row,column of second corner
        ES:DI -> image buffer (see #03261)
Note:   the specified corners are included in the saved image
SeeAlso: AH=0Eh

Format of HP 95LX image buffer:
Offset  Size    Description     (Table 03261)
 00h    WORD    number of planes (always 01h on HP 95LX)
 02h    WORD    number of bits/pixel (always 01h on HP 95LX)
 04h    WORD    image width in pixels
 06h    WORD    image height in pixels
 08h  N BYTEs   image data
                requires (WIDTH+7)/8 * HEIGHT bytes
--------b-5F0E-------------------------------
INT 5F - HP 95LX/100LX/200LX GRAPHICS PRIMITIVES - PUT IMAGE
        AH = 0Eh
        AL = replacement rule (see #03262)
        DX,CX = row,column of top left corner
        ES:DI -> image buffer (see #03261)
Note:   if the specified image does not fit completely on the screen, this call
          does nothing
SeeAlso: AH=0Dh

Bitfields for replacement rule:
Bit(s)  Description     (Table 03262)
 2      invert image before applying rule
 1-0    function (00 force, 01 AND, 10 OR, 11 XOR)
--------b-5F0F-------------------------------
INT 5F - HP 95LX/100LX/200LX GRAPHICS PRIMITIVES - WRITE TEXT
        AH = 0Fh
        AL = rotate flag (if nonzero, rotate 90 degrees counter-clockwise)
        DX,CX = row,column of first character's top left corner
        ES:DI -> ASCIZ text
--------b-5F10-------------------------------
INT 5F - HP 100LX/200LX GRAPHICS PRIMITIVES - GET FONT POINTER
        AH = 10h
        CX = font size of desired font
            0808h  8x8  small  (80x25 text)
            0A0Bh 11x10 medium (64x18 text)
            100Ch 12x16 large  (40x16 text)
Return: DX:AX -> ptr to font or 0000h:fontID# if built-in font
SeeAlso: AH=11h
--------b-5F11-------------------------------
INT 5F - HP 100LX/200LX GRAPHICS PRIMITIVES - SET CURRENT FONT
        AH = 11h
        ES:DI -> ptr to font or 0000h:fontID# for built-in font
Note:   this function should be called immediately after AH=10h with the
          pointer supplied by that call
SeeAlso: AH=10h
--------!---Section--------------------------
Interrupt List, part 15 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------*-60---------------------------------
INT 60 - reserved for user interrupt
--------v-60---------------------------------
INT 60 - VIRUS - "Zero Bug" - INSTALLATION CHECK
Desc:   The "Zero Bug" virus hooks this vector.  It considers itself installed
          if offset 103h of the handler's segment contains the bytes "ZE"
SeeAlso: INT 32"VIRUS",INT 44"VIRUS",INT 61"SEMTEX"
--------d-60---------------------------------
INT 60 - Adaptec and OMTI controllers - DRIVE 0 DATA
SeeAlso: INT 41"HARD DISK 0",INT 61"Adaptec",INT 62"Adaptec",INT 63"Adaptec"
SeeAlso: INT 64"Adaptec",INT C0"AMI",#00732 at INT 1A/AX=B102h
Notes:  this vector stores the first four bytes of the parameter table for
          hard disk 0
        these vectors are used by the following Adaptec controllers:
            ACB 2370 A/B/C, ACB 2372 A/B/C, ACB 2333 A/B, 2322B-8, 2322B-16
        these vectors are NOT used by the following Adaptec controllers:
            ACB 2310, ACB 2312, ACB 2320D, ACB 2322D
--------b-60---------------------------------
INT 60 - TI Professional PC - SYSTEM ROM DATA AREA POINTER (NOT A VECTOR!)
Desc:   the low word of this vector contains the segment of the RAM data area
          to be used by the system ROM at F400h:A000h, and the high word
          contains the length of the data area (see #03263)
SeeAlso: INT 61"TI Professional PC",INT 66"TI Professional PC"

Format of TI Professional System ROM data area:
Offset  Size    Description     (Table 03263)
 00h    BYTE    port 00h shadow
 01h    BYTE    port 03h shadow
 02h    BYTE    port 04h shadow
 03h    WORD    system configuration word (see #03266)
 05h    BYTE    25ms count
 06h    WORD    offset of timing event 1 (0008h)
 08h    WORD    (event 1) offset of timing event 2 (0010h)
 0Ah    BYTE    (event 1) unused (FFh)
 0Bh    BYTE    (event 1) active flag (bit 7 set if on)
 0Ch    WORD    (event 1) count-down until end of event
 0Eh    WORD    (event 1) event routine (in segment F400h) to call at timeout
 10h    WORD    (event 2) offset of timing event 3 (0018h)
 12h    BYTE    (event 2) unused (FFh)
 13h    BYTE    (event 2) active flag (bit 7 set if on)
 14h    WORD    (event 2) count-down until end of event
 16h    WORD    (event 2) event routine (in segment F400h) to call at timeout
 18h    WORD    (event 3) offset of timing event 3 (0020h)
 1Ah    BYTE    (event 3) unused (FFh)
 1Bh    BYTE    (event 3) active flag (bit 7 set if on)
 1Ch    WORD    (event 3) count-down until end of event
 1Eh    WORD    (event 3) event routine (in segment F400h) to call at timeout
 20h    WORD    (event 4) 0000h - last event
 22h    BYTE    (event 4) unused (FFh)
 23h    BYTE    (event 4) active flag (bit 7 set if on)
 24h    WORD    (event 4) count-down until end of event
 26h    WORD    (event 4) event routine (in segment F400h) to call at timeout
 28h    WORD    offset of start of text display within segment DE00h
 2Ah    WORD    end of display
 2Ch    WORD    current absolute cursor position
 2Eh    WORD    start of current character row
 30h    WORD    current cursor column
 32h    WORD    cursor type and size (see #03264)
 34h    WORD    start of protected status region on screen (0000h = none)
 36h    BYTE    pop flag used by some ROM routines
                00h pop registers before return
                nonzero: do not pop
 37h    BYTE    unused (FFh)
 38h    BYTE    PAUSE flag
                00h off
                FFh on
 39h    BYTE    temp: current attribute while moving characters on screen
 3Ah    WORD    start of keyboard queue (next key at start+2 or 0042h if 0060h)
 3Ch    WORD    end of keyboard queue (next key inserted at end+2 or 0042h)
 3Eh    BYTE    number of characters in buffer
 3Fh    BYTE    keyboard mode flags (see #03265)
 40h    BYTE    Alt-digit-digit-digit accumulator
 41h    BYTE    Alt-digit-digit-digit count of digits (mod 3)
 42h 16 WORDs   keyboard buffer (circular queue)
 62h  8 DWORDs  Drive Interface Table pointers for floppies A:-D: + four others
                (0000h:0000h if pointer not in use)
 82h    BYTE    disk-error retry count (incremented on each disk error)
 83h  2 BYTEs   BIOS scratch space
 85h  8 BYTEs   current cylinder number for drives 0-7
                FFh = unknown
 8Dh    BYTE    BIOS scratch space
 8Eh    BYTE    hard error code for last disk access
                00h operation successful
 8Fh  8 BYTEs   save area for disk DSR parameters
 97h  6 BYTEs   current drive status
 9Dh    BYTE    retry error status
 9Eh    BYTE    BIOS scratch space
 9Fh  7 BYTEs   ???
 A6h  2 WORDs   INT 47 save area for SS,SP
 AAh  2 WORDs   INT 46 save area for SS,SP
 AEh  2 WORDs   INT 43 save area for SS,SP
 B2h  2 WORDs   save area for SS,SP to be restored by common intr. exit routine
 B6h 24 WORDs   stack for INT 47
 E6h 24 WORDs   stack for INT 46
116h 17 WORDs   stack for INT 43
13Ah  6 BYTEs   system date and time (hundredths, seconds, minutes, hours, and
                  WORD days since 01jan1980)
Note:   timing event 1 is the disk I/O timeout, event 2 is the floppy disk
          motor timeout, event 3 is the floppy disk motor spin-up time, and
          event 4 is used to turn off the speaker after a delay

Bitfields for TI Professional PC cursor size and type:
Bit(s)  Description     (Table 03264)
 15     reserved (0)
 14-13  cursor type
        00 nonblinking
        01 off
        10 slow blink
        11 fast blink
 12-8   starting scan line (0-11)
 7-5    reserved (0)
 4-0    ending scan line (0-11)
SeeAlso: #03263

Bitfields for TI Professional PC keyboard mode flags:
Bit(s)  Description     (Table 03265)
 7      CapsLock was ON at last keypress
 6-4    reserved (0)
 3      repeat key
 2      Shift was down at last keypress
 1      Alt was down at last keypress
 0      Ctrl was down at last keypress
SeeAlso: #03263

Bitfields for TI Professional System Configuration Word:
Bit(s)  Description     (Table 03266)
 0      drive A: installed
 1      drive B: installed
 2      drive C: installed
 3      drive D: installed
 4      drive A: is 80-track
 5      drive A: is double-sided
 6      60-Hz (USA,etc.) system instead of 50-Hz (Europe)
 7      hard disk installed
 8      serial port 1 installed
 9      serial port 2 installed
 10     serial port 3 installed
 11     serial port 4 installed
 14-12  installed graphics planes
        000 none
        001 plane A
        111 planes A, B, and C
 15     clock installed
SeeAlso: #03263
--------b-60---------------------------------
INT 60 - Atari Portfolio - USER INTERFACE FUNCTIONS
Desc:   supplies a number of subfunctions which perform such functions as
          drawing boxes and menus, and provide input line editing
SeeAlso: INT 61/AH=00h"Atari",INT 61"EXTENDED BIOS"
--------V-60---------------------------------
INT 60 - Nabbit v2.0 - (NOT A VECTOR!) - INSTALLATION CHECK
Program: Nabbit is a shareware resident screen data grabber by RSE Inc.
Range:  INT 60 to INT 66, selected by searching for first free vector
Note:   the Nabbit installation check consists of testing whether the
          interrupt vector points at the ASCIZ signature string "iG"
          (69h 47h 00h)
--------V-60---------------------------------
INT 60 - ATI M64VBE.COM - INSTALLATION SIGNATURE
Program: M64VBE is a VESA VBE 2.0 driver TSR for ATI's Mach64 video chip
InstallCheck:   scan for an interrupt with the ASCIZ signature "M64VBE" three
          bytes past the interrupt handler
Range:  INT 60 to INT 66, selected by searching for first free vector
SeeAlso: INT 10/AX=4FDDh"M64VBE",INT 10/AX=4FFFh/BX=364Dh"M64VBE"
--------V-60---------------------------------
INT 60 U - Buffit v3.0 - (NOT A VECTOR!) - INSTALLATION CHECK
Program: Buffit is a shareware scrollback utility by D.T. Hamilton
Range:  INT 60 to INT 6F, selected by searching for first free vector
Notes:  the Buffit installation check consists of testing whether the
          interrupt vector points at the ASCII signature "Buffit  "
        there is a private entry point (see #03267) immediately following the
          signature string, i.e. eight bytes beyond the address pointed at
          by the interrupt vector

(Table 03267)
Call Buffit private entry point with:
        AH = function
            00h get information and hotkey state
            01h get information and toggle hotkey state
Return: AH = new hotkey state (00h enabled, 01h disabled)
        AL = hotkey scan code (see #00006)
        BH = hotkey shift states
        BL = ??? (01h)
        CX = segment of resident code
        DH = interrupt number used for signature pointer
        DL = ??? (00h)
        SI = INT 09 handler offset
        DI = INT 21 handler offset
Index:  hotkeys;Buffit
--------r-60---------------------------------
INT 60 - PC-IPC API
        STACK:  DWORD   pointer to parameter block (see #03268)
Return: STACK:  unchanged
Program: PC-IPC is a shareware TSR by Donnelly Software Engineering which
          allows communication between independent programs
Range:  INT 00 to INT FF, selected by commandline switch

Format of PC-IPC parameter block:
Offset  Size    Description     (Table 03268)
 00h    WORD    caller's ID
 02h    WORD    to ID
 04h    WORD    command code (see #03269)
 06h    WORD    returned status (see #03270)
 08h    WORD    returned error code (see #03271)
 0Ah    WORD    size of data
 0Ch    DWORD   pointer to data buffer

(Table 03269)
Values for PC-IPC command code:
 01h "IPC_CMND_INQUIRE"  inquire current status
        set status field, writes WORD to data buffer containing free
          message space in bytes, and sets the "size" field to the
          number of messages waiting
 02h "IPC_CMND_ENABLE"  reenable PC-IPC
        ignored unless called with the same ID that disabled PC-IPC
 03h "IPC_CMND_DISABLE" disable PC-IPC
 04h "IPC_CMND_INSTALL" reset PC-IPC
 06h "IPC_CMND_RDATA"   read data
        returns first message in data buffer, sets "size" to message length
          and "to ID" field to sender's ID
        if no messages available, bit 4 of status is cleared and "size" is
          set to zero
 07h "IPC_CMND_SDATA"   send data
 08h "IPC_CMND_REQID"   require user ID
        create a new recognized ID and return in "caller's ID" field
 09h "IPC_CMND_DELID"   cancel user ID
        delete caller's ID from pool of recognized IDs
 0Ah "IPC_CMND_RDATAW"  read data, wait if no messages available
 0Bh "IPC_CMND_VERS"    get PC-IPC version
        string representing version returned in data buffer, "size" field
          set to length of string

Bitfields for returned status:
Bit(s)  Description     (Table 03270)
 0      unused
 1      IPC enabled
 2      IPC installed
 3      error
 4      message(s) available

(Table 03271)
Values for PC-IPC error code:
 00h    no error
 01h    invalid command or parameter
 02h    only process 0 can install/reset IPC
 03h    process can not install/reset IPC
 04h    IPC is not enabled
 05h    process can not disable IPC
 06h    invalid destination process ID
 07h    invalid sending process ID
 08h    invalid data destination
 09h    no more process IDs available
 0Ah    can not relinquish that process ID
 0Bh    message space is full
 0Ch    IPC is not installed
--------R-60---------------------------------
INT 60 - Tangram Arbiter - API
Desc:   Arbiter makes a PC disk look like a slow disk over an SNA link to an
          IBM mainframe
Range:  INT 60h to INT 66h, selected by configuration parameter
Notes:  identified by string "@ARB_API" immediately following a short jump at
          the interrupt handler address
--------N-60---------------------------------
INT 60 - Excelan LAN Workplace for DOS 3.5 - API
        ES:BX -> request packet (see #03272)
Return: request packet updated
InstallCheck:   test for the WORD 4142h ('AB') immediately preceding the
          interrupt handler
Note:   this interrupt is also supported by Beame&Whiteside's BWLWP35 shim,
          which was used in creating this description
BUG:    because BWLWP35 range-checks only the low byte of the function number,
          and has a fencepost error even in that test, functions 000Bh and
          XX01h-XX0Bh (XX nonzero) branch to random locations
SeeAlso: INT 2F/AX=7A40h

Format of Excelan request packet:
Offset  Size    Description     (Table 03272)
 00h 12 BYTEs   ???
 0Ch    WORD    (ret) error code (see #03273)
 0Eh    DWORD   -> FAR function for ???
 12h    WORD    function number
                0001h ???
                0002h NOP
                0003h NOP
                0004h NOP
                0005h ???
                0006h get ??? record
                0007h NOP
                0008h reset ???
                0009h NOP
                000Ah set ???
        ???
---function 01h---
 20h    BYTE    (call) subfunction (32h-3Bh)
                3Bh non-blocking I/O request (will be tested every clock tick)
 21h    BYTE    (ret) error code
                00h successful
                09h invalid connection number
                2Ah bad connection type
                45h ???
---function 01h, subfunction 32h---
 3Ah    WORD    (call) connection type (01h stream, 02h datagram)
---function 01h, subfunction 34h---
 26h    WORD    (call) ???
 28h    WORD    (call) ???
 2Ah    WORD    (call) ???
---function 01h, subfunction 35h---
 1Ah    WORD    (call) connection number???
 26h    WORD    (ret) ???
---function 01h, subfunction 36h---
 1Ah    WORD    (call) connection number???
 38h    WORD    ???
---function 01h, subfunction 37h---
 24h    WORD    (ret) ???
 26h    WORD    (ret) ???
---function 01h, subfunction 38h---
 1Ah    WORD    (call) connection number???
---function 01h, subfunction 3Ah---
 22h    WORD    (call) ???
                667Eh ???
                667Fh ???
 24h    BYTE    (call 667Eh) ???
 24h    WORD    (return 667Fh) ???
---function 01h, subfunction 3Bh---
 0Eh    DWORD   (call) -> function to invoke for I/O or 0000h:0000h
                function called with AX = 0000h
                                     STACK: DWORD -> request packet
                                            WORD 0000h
                        should return STACK unchanged
 1Ah    WORD    (call) connection number???
 21h    BYTE    (ret) set to 01h when I/O becomes possible
 22h    BYTE    (call) direction (00h write, 01h read)
 34h    DWORD   (ret) -> next pending request packet
---function 05h---
 1Eh    WORD    (call) ???
 20h    WORD    (call) ???
 34h    DWORD   (call) -> ???
---function 06h---
 16h    DWORD   (call) -> buffer for ??? record (see #03274)
 1Ah    WORD    (call) number of bytes to copy
 22h    WORD    (ret) number of bytes transferred
---function 08h---
 14h    WORD    (ret) ??? (0001h)
---function 0Ah---
 16h    DWORD   (call) -> WORD ???
 1Ch    WORD    (call) must be 000Ah for BWLWP35

(Table 03273)
Values for Excelan error code:
 0000h  successful
 002Dh  invalid function
 0050h  ???

Format of ??? record:
Offset  Size    Description     (Table 03274)
 00h    WORD    offset of ???
 02h  4 BYTEs   ???
 06h    DWORD   IP address (big-endian)
 0Ah  6 BYTEs   physical address (big-endian)
        ???
--------N-60---------------------------------
INT 60 - TCPDRV 2.01 - TCP/IP Application Binary Interface (ABI)
Note:   The handler for the interrupt will start with a 2-byte NEAR jump
          instruction, followed by the ASCIZ signature string "TCP DRVR".
        To find the interrupt being used by the driver, an application
          should scan through interrupt vectors 60h to 7Fh until it finds
          one with the "TCP DRVR" string.
        This specification is being proposed by Peter R. Tattam from the
          University of Tasmania.
Index:  installation check;TCPDRV
--------G-60---------------------------------
INT 60 U - INTRSPY/CMDSPY v1.0 only - API
Program: INTRSPY is a script-driven debugger included with the book
          _Undocumented_DOS_.
InstallCheck:   determine that a) the handler is an IRET instruction, and
          b) the signature 0Dh "INTRSPY vN.NN" immediately precedes the handler
Notes:  INTRSPY will hook the first available interrupt in the range 60h-67h.
        If INTRSPY is installed, the DWORD immediately after the IRET stores
          its entry point (see #03275)
        INTRSPY v2.0 (included with the second edition of the book) no longer
          supports this API
Index:  installation check;INTRSPY

(Table 03275)
Call INTRSPY v1.0 entry point with:
        AH = function
            00h ???
            01h set current directory (for use in reporting)
                ES:DI -> counted string containing directory name (max 79 char)
            02h set name of script file
                ES:DI -> counted string containing file name (max 79 chars)
            03h set script arguments
                ES:DI -> counted string containing arguments (max 79 chars)
            04h get directory set with function 01h
                ES:DI -> 80-byte buffer for directory name
            05h get name of script file
                ES:DI -> 80-byte buffer for script filename
            06h get script arguments
                ES:DI -> 80-byte buffer for script arguments
            07h get ???
                CL = 00h-15h specifies what to get
                ES:DI -> WORD to be set with desired value on return
            08h get ???
                ES:DI -> WORD to be set with returned value
            09h get ???
                ES:DI -> WORD to be set with returned value
            0Bh store code for interrupt handler???
                ES:DI -> data
                CX = number of bytes
            0Ch ???
                ES:DI -> ???
            0Dh get ???
                ES:DI -> BYTE to be set with returned value
            0Eh set ??? flag
            0Fh clear ??? flag
            10h ???
                Return: AL = 04h or 05h if failed
            11h ???
                Return: AL = 05h if failed
            12h get ???
                ES:DI -> buffer
                Return: CX = number of bytes returned in buffer
            13h ???
Return: AH = 00h
        AL = status
            00h successful
            01h invalid function
            02h ???
            03h ???
            04h ???
            05h ???
--------u-60---------------------------------
INT 60 U - PC/370 v4.2 - ???
        ???
Return: ???
Program: PC/370 is an IBM 370 emulator by Donald S. Higgins
Range:  INT 00 to INT FF, selected by patching the executable
Note:   the documentation includes instructions for patching the system for
          another interrupt
SeeAlso: INT 2F/AX=7F24h,INT DC"PC/370"
--------r-60---------------------------------
INT 60 - JPI TopSPEED Modula-2 v1 - PROCEDURE ENTRY TRAP
SeeAlso: INT 61"JPI"
--------N-60---------------------------------
INT 60 - FTP Packet Driver - PC/TCP Packet Driver Specification
Range:  INT 20 to INT FF
Notes:  The handler for the interrupt will start with a 3-byte jump
          instruction, followed by the ASCIZ string "PKT DRVR" (the
          terminating NUL is significant).
        To find the interrupt being used by the driver, an application should
          scan through interrupt vectors 20h to FFh (60h through 80h for
          v1.09- of the specification) until it finds one with the "PKT DRVR"
          string.
        AH values of 80h to FFh have been reserved for user-defined additions.
--------I-60---------------------------------
INT 60 u - 3270-PC CONTROL PROGRAM - ???
--------b-60----DI0100-----------------------
INT 60 u - HP 95LX System Manager - WAIT FOR EVENT
        DI = 0100h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to event record (see #03277)
Return: event record filled
        STACK unchanged
Note:   this call will timeout after about 500ms
SeeAlso: INT 15/AX=4DD4h,INT 60/DI=0101h,INT 61"HP 95LX",INT 62"HP 95LX"

(Table 03276)
Values for HP 95LX event type:
 00h    no events
 01h    keystroke available
 02h    Ctrl-Break
 03h    reactivation (always follows deactivation event)
 04h    about to deactivate (sleep)
        next get-event call will not return until reactivated
 05h    forced application termination
 06h    1-2-3 bridge service request (only given to 1-2-3)
 07h    request to grow
 08h    request to shrink
 09h    application's alarm expired
 0Ah    daily chance to set an alarm
 0Bh    system date or time has been changed

Format of HP 95LX event record:
Offset  Size    Description     (Table 03277)
 00h    WORD    event type (see #03276)
 02h    WORD    ASCII code page 850 translation of keystroke
                or grow/shrink amount in paragraphs or 0000h if error
                or alarm expiration data
 04h    BYTE    scan code from BIOS
 05h    BYTE    shift key states at time keystroke is retrieved
 06h    WORD    LICS translation of keystroke
 08h    BYTE    function key number (1-2-3 only)
 09h    DWORD   pointer to 1-2-3 bridge record (see #03279)
                or pointer to time change structure (see #03278)
Note:   if the System Manager is awaiting the conclusion of a bridge service
          or grow/shrink call and the event type field is set to FFFFh on
          entry, the SysMgr will resume

Format of HP 95LX time change structure:
Offset  Size    Description     (Table 03278)
 00h    WORD    old year
 02h    BYTE    old month
 03h    BYTE    old date
 04h    BYTE    old day
 05h    BYTE    old hour
 06h    BYTE    old minute
 07h    BYTE    old second
 08h    BYTE    old hundredth of a second
 09h  9 BYTEs   new time in same format as old time
--------b-60----DI0101-----------------------
INT 60 u - HP 95LX System Manager - CHECK FOR EVENT
        DI = 0101h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD pointer to event record (INT 60/DI=0100h)
Return: event record filled
        STACK unchanged
Note:   this call returns immediately if no event is available
SeeAlso: INT 60/DI=0100h
--------b-60----DI0102-----------------------
INT 60 u - HP 95LX System Manager - "SH_STATUS"
        DI = 0102h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
--------b-60----DI0104-----------------------
INT 60 u - HP 95LX System Manager - LOTUS 1-2-3 BRIDGE SERVICES
        DI = 0104h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD pointer to bridge record (see #03279)
Return: ???
        STACK unchanged

Format of HP 95LX bridge record:
Offset  Size    Description     (Table 03279)
 00h    WORD    function code (see #03280)
 02h    WORD    return code from 1-2-3
 04h 16 BYTEs   ASCII range name
 14h    WORD    start column of range
 16h    WORD    start row of range
 18h    WORD    end column of range
 1Ah    WORD    end row of range
 1Ch    WORD    order in which data is placed in buffer
 1Eh    WORD    buffer size
 20h    WORD    offset within bridge record's segment of buffer for cell data

(Table 03280)
Values for HP 95LX function code:
 00h    test
 01h    get range
 02h    "GETRANGE_ADDR"
 03h    "SETRANGE_ADDR"
 04h    "GETRANGE_DATA"
 05h    "SETRANGE_DATA"
 06h    recalculate
 07h    get cursor
 08h    set cursor
 09h    redisplay
 0Ah    cell type
 0Bh    "CALCTYPE"
--------b-60----DI0105-----------------------
INT 60 u - HP 95LX System Manager - FLUSH KEYBOARD BUFFER
        DI = 0105h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
--------b-60----DI0106-----------------------
INT 60 u - HP 95LX System Manager - YIELD CPU
        DI = 0106h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD pointer to ???
Return: ???
        STACK unchanged
SeeAlso: INT 15/AX=1000h,INT 2F/AX=1680h
--------b-60----DI0107-----------------------
INT 60 u - HP 95LX System Manager - "NO_FINI" - REFUSE TERMINATION REQUEST
        DI = 0107h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD pointer to ???
Return: ???
        STACK unchanged
SeeAlso: INT 15/AX=4DD4h,INT 61"HP 95LX",INT 62"HP 95LX"
--------b-60----DI0200-----------------------
INT 60 u - HP 95LX System Manager - SETUP MENU
        DI = 0200h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to menu data (see #03281)
                DWORD   pointer to ???
                WORD    number of items on menu???
                WORD    ???
                DWORD   pointer to ???
                WORD    ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
SeeAlso: INT 15/AX=4DD4h,INT 60/DI=0201h,INT 60/DI=0203h,INT 60/DI=0205h

Format of HP 95LX menu data:
Offset  Size    Description     (Table 03281)
 00h 80 BYTEs   first line of menu text
 50h 80 BYTEs   second line of menu text
 A0h 80 BYTEs   third line of menu text
 F0h    WORD    number of keywords
 F2h    WORD    index of currently highlighted keyword or FFFFh
 F4h    WORD    single prompt on top line if nonzero
 F6h 20 BYTEs   which line each of 20 keywords is located on
10Ah 20 BYTEs   offset of each of 20 keywords within its line
11Eh 20 BYTEs   length of each of 20 keywords
132h 20 BYTEs   first letter of each of 20 keywords
146h 20 WORDs   offsets of long prompts for each of 20 keywords
--------b-60----DI0201-----------------------
INT 60 u - HP 95LX System Manager - DISPLAY OR REDISPLAY MENU
        DI = 0201h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to menu data (see #03281)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0200h,INT 60/DI=0202h,INT 60/DI=0206h
--------b-60----DI0202-----------------------
INT 60 u - HP 95LX System Manager - "MENU_ON" - ENABLE PROCESSING OF MENU
        DI = 0202h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to menu data (see #03281)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0200h,INT 60/DI=0201h,INT 60/DI=0203h
--------b-60----DI0203-----------------------
INT 60 u - HP 95LX System Manager - REMOVE MENU
        DI = 0203h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to menu data (see #03281)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0201h,INT 60/DI=0202h,INT 60/DI=0204h,INT 60/DI=0208h
--------b-60----DI0204-----------------------
INT 60 u - HP 95LX System Manager - LET SYSTEM MANAGER HANDLE MENU KEYSTROKE
        DI = 0204h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to menu data (see #03281)
                WORD    keystroke
                DWORD   pointer to WORD to receive selection number
Return: buffer for selection number filled with index of selected menu item or
          FFFFh if no final selection yet
        STACK unchanged
SeeAlso: INT 60/DI=0200h,INT 60/DI=0202h,INT 60/DI=0207h
--------b-60----DI0205-----------------------
INT 60 u - HP 95LX System Manager - INITIALIZE FILE SELECTION MENU
        DI = 0205h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to file menu structure (see #03282)
                DWORD   pointer to edit record (see #03285 at INT 60/DI=0400h)
                DWORD   pointer to wildcard filespec for initial file list
                WORD    row???
                WORD    column???
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0200h,INT 60/DI=0206h,INT 60/DI=0208h

Format of HP 95LX file menu structure:
Offset  Size    Description     (Table 03282)
 00h    DWORD   pointer to ASCIZ base directory name
 04h    DWORD   pointer to ASCIZ file pattern (wildcard filespec)
 08h    DWORD   pointer to file list workspace, at least 1024 bytes (see #03283)
 0Ch    WORD    size of file list workspace in bytes
 0Eh    WORD    starting row (-3 is topmost, 0 is first non-"reserved" line)
 10h    WORD    starting column
 12h    WORD    number of lines
 14h    WORD    number of columns
 16h    WORD    number of files displayed on each line
---the remaining fields are initialized by the System Manager---
 18h    WORD    0000h if first edit character, else multiline
 1Ah    WORD    number of files in file list
 1Ch    WORD    max files workspace has room for
 1Eh    WORD    file at top of list
 20h    WORD    index of file to highlight
 22h    WORD    index of file to unhighlight
 24h    WORD    current focus (01h FMENU, 02h EDIT)

Format of HP 95LX file list workspace entry:
Offset  Size    Description     (Table 03283)
 00h    BYTE    file attributes
 01h    WORD    file time (see #01665 at INT 21/AX=5700h)
 03h    WORD    file date (see #01666 at INT 21/AX=5700h)
 05h    DWORD   file size
 09h 13 BYTEs   ASCIZ filename
--------b-60----DI0206-----------------------
INT 60 u - HP 95LX System Manager - DISPLAY/REDISPLAY FILE SELECTION MENU
        DI = 0206h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to file menu structure (see #03282)
                DWORD   pointer to edit record (see #03285 at INT 60/DI=0400h)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0205h
--------b-60----DI0207-----------------------
INT 60 u - HP 95LX System Manager - LET SYSMGR PROCESS FILE SEL MENU KEYSTROKE
        DI = 0207h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to file menu structure (see #03282)
                DWORD   pointer to edit record (see #03285 at INT 60/DI=0400h)
                WORD    keystroke
Return: AX = status (see #03284)
        STACK unchanged
SeeAlso: INT 60/DI=0205h,INT 60/DI=0208h

(Table 03284)
Values for HP 95LX System Manager status:
 0000h  keystroke processed, call INT 60/DI=0206h to refresh menu
 0001h  redisplay application area before refreshing menu
 0002h  user confirmed selection, filename is in edit record's buffer
 0003h  user aborted menu
 FFFBh  bad filename
 FFFCh  bad directory
 FFFDh  bad drive
 FFFEh  unknown keystroke
 FFFFh  keystroke known but invalid in current context
--------b-60----DI0208-----------------------
INT 60 u - HP 95LX System Manager - REMOVE FILE SELECTION MENU
        DI = 0208h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to file menu structure (see #03282)
                DWORD   pointer to edit record (see #03285 at INT 60/DI=0400h)
Return: ???
        STACK unchanged
SeeAlso: INT 15/AX=4DD4h,INT 60/DI=0205h,INT 60/DI=0206h
--------b-60----DI0300-----------------------
INT 60 u - HP 95LX System Manager - DISPLAY STRING
        DI = 0300h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    starting row (-3 is topmost, 0 is first user line)
                WORD    starting column
                DWORD   pointer to string
                WORD    length of string
                WORD    display style: 0000h normal, 0001h reverse video
                WORD    "OSTYLE"
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0F03h,INT 60/DI=1005h
--------b-60----DI0301-----------------------
INT 60 u - HP 95LX System Manager - CLEAR PORTION OF SCREEN
        DI = 0301h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    starting row (-3 is topmost, 0 is first user line)
                WORD    starting column
                WORD    number of rows
                WORD    number of columns
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0302h,INT 60/DI=1005h
--------b-60----DI0302-----------------------
INT 60 u - HP 95LX System Manager - SCROLL PORTION OF SCREEN
        DI = 0302h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    starting row???
                WORD    starting column???
                WORD    height of scroll region???
                WORD    width of scroll region???
                WORD    number of lines to scroll region???
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0301h
--------b-60----DI0303-----------------------
INT 60 u - HP 95LX System Manager - SCREEN SERVICE "M_XCHG"
        DI = 0303h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                WORD    ???
                WORD    ???
                WORD    ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0304-----------------------
INT 60 u - HP 95LX System Manager - SCREEN SERVICE "M_CHRATTR"
        DI = 0304h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0305-----------------------
INT 60 u - HP 95LX System Manager - SCREEN SERVICE "M_CHRRVRT"
        DI = 0305h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                WORD    ???
                DWORD   pointer to ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0307-----------------------
INT 60 u - HP 95LX System Manager - SCREEN SERVICE "M_CHRINV"
        DI = 0307h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                WORD    ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0308-----------------------
INT 60 u - HP 95LX System Manager - SCREEN SERVICE "M_ROWS_COLS"
        DI = 0308h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
--------b-60----DI0309-----------------------
INT 60 u - HP 95LX System Manager - SET SCREEN (VIDEO???) MODE
        DI = 0309h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    new mode
Return: ???
        STACK unchanged
--------b-60----DI030A-----------------------
INT 60 u - HP 95LX System Manager - GET SCREEN (VIDEO???) MODE
        DI = 030Ah
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
--------b-60----DI030B-----------------------
INT 60 u - HP 95LX System Manager - SET CURSOR POSITION
        DI = 030Bh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    row (-3 is topmost, 0 is first non-reserved line)
                WORD    column
Return: ???
        STACK unchanged
Note:   cursor is hidden if the specified position is not on the physical
          display
SeeAlso: INT 10/AH=02h,INT 15/AX=4DD4h,INT 61"HP 95LX",INT 62"HP 95LX"
--------b-60----DI0400-----------------------
INT 60 u - HP 95LX System Manager - "EDIT_INIT"
        DI = 0400h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to edit record (see #03285)
                DWORD   pointer to string to be edited
                WORD    initial length of string being edited
                WORD    maximum length of edited string
                WORD    row of edit field
                WORD    leftmost column of edit field
Return: ???
        STACK unchanged

Format of HP 95LX edit record:
Offset  Size    Description     (Table 03285)
 00h    WORD    current length of edit buffer
 02h    BYTE    flag for special processing on first character
 03h    BYTE    flags
                bit 0: tab handling
 04h    WORD    editing in prompt window?
 06h    DWORD   pointer to top line of prompt window message
 0Ah    WORD    length of top line of prompt
 0Ch    DWORD   pointer to second line of prompt window message
 10h    WORD    length of second line of prompt
 12h 80 BYTEs   workspace for editing
 62h  2 WORDs   line array needed for multi-line editing
 66h 36 BYTEs   multi-line edit record (see #03286)
 8Ah    WORD    displayable columns

Format of HP 95LX multi-line edit record:
Offset  Size    Description     (Table 03286)
 00h    DWORD   pointer to user-supplied edit buffer
 04h    WORD    length of edit buffer
 06h    WORD    current cursor position
 08h    WORD    starting row of edit area (-3 is topmost, 0 is first user line)
 0Ah    WORD    starting column of edit area
 0Ch    WORD    height of edit area
 0Eh    WORD    width of edit area
 10h    WORD    current top row (-3 is topmost, 0 is first user line)
 12h    WORD    number of rows displayable
 14h    BYTE    cursor column
 15h    BYTE    01h if buffer has been modified
 16h    BYTE    first displayable column (ticker fields only)
 17h    BYTE    01h if wordwrap enabled, FFh if ticker field
 18h    DWORD   pointer to array of line starts (at least one bigger than edit
                  area is high)
 1Ch    BYTE    currently marking?
 1Dh    BYTE    flag
 1Eh    WORD    offset of mark start
 20h    WORD    offset of mark end (inclusive)
 22h    WORD    displayable columns
--------b-60----DI0401-----------------------
INT 60 u - HP 95LX System Manager - EDIT ON TOP LINE
        DI = 0401h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to edit record (see #03285)
                DWORD   pointer to string to edit
                WORD    initial length of string being edited
                WORD    maximum length of edited string
                DWORD   pointer to first line of prompt
                WORD    length of first line
                DWORD   pointer to second line of prompt
                WORD    length of second line
Return: ???
        STACK unchanged
--------b-60----DI0402-----------------------
INT 60 u - HP 95LX System Manager - DISPLAY OR REDISPLAY EDIT FIELD
        DI = 0402h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to edit record (see #03285)
Return: ???
        STACK unchanged
--------b-60----DI0403-----------------------
INT 60 u - HP 95LX System Manager - LET SYSTEM MANAGER PROCESS EDITING KEYSTROK
        DI = 0403h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to edit record (see #03285)
                WORD    keystroke
                DWORD   pointer to WORD buffer for result code
Return: result code buffer filled with 0001h if editing complete
        STACK unchanged
--------b-60----DI0404-----------------------
INT 60 u - HP 95LX System Manager - "MDIT_INI"
        DI = 0404h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
                WORD    ???
                WORD    ???
                WORD    ???
                DWORD   pointer to ???
                WORD    ???
                WORD    ???
                WORD    ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0405-----------------------
INT 60 u - HP 95LX System Manager - "MDIT_DIS"
        DI = 0405h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0406-----------------------
INT 60 u - HP 95LX System Manager - "MDIT_KEY"
        DI = 0406h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0407-----------------------
INT 60 u - HP 95LX System Manager - "MDIT_FIL"
        DI = 0407h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0408-----------------------
INT 60 u - HP 95LX System Manager - "MDIT_MARK"
        DI = 0408h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0409-----------------------
INT 60 u - HP 95LX System Manager - "MDIT_UNMARK"
        DI = 0409h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI040A-----------------------
INT 60 u - HP 95LX System Manager - "MDIT_CUTMARK"
        DI = 040Ah
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI040B-----------------------
INT 60 u - HP 95LX System Manager - "MDIT_INS_STR"
        DI = 040Bh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                DWORD   pointer to ???
                WORD    ???
Return: ???
        STACK unchanged
SeeAlso: INT 15/AX=4DD4h,INT 61"HP 95LX",INT 62"HP 95LX"
--------b-60----DI0500-----------------------
INT 60 u - HP 95LX System Manager - OPEN FILE
        DI = 0500h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to file state record (see #03287)
                DWORD   pointer to filename
                WORD    length of filename
                WORD    ???
                WORD    suppress buffering if nonzero
Return: AX = status
        STACK unchanged
SeeAlso: INT 60/DI=0501h,INT 60/DI=0502h,INT 60/DI=0508h

Format of HP 95LX file state record:
Offset  Size    Description     (Table 03287)
 00h    WORD    DOS file handle
 02h    WORD    state flags (see #03288)
 04h    DWORD   current DOS physical file offset (FFFFFFFFh if unknown)
 08h    DWORD   DOS file offset of start of buffer
 0Ch    DWORD   effective file offset as seen by caller
 10h    WORD    number of bytes in file buffer
---buffered I/O only---
 12h 512 BYTEs  file buffer

Bitfields for HP 95LX file state flags:
Bit(s)  Description     (Table 03288)
 0      buffer contents valid
 1      buffer is dirty and must be written
 2      unbuffered I/O
 3      file is a character device
SeeAlso: #03287
--------b-60----DI0501-----------------------
INT 60 u - HP 95LX System Manager - OPEN FILE IN READ-ONLY MODE
        DI = 0501h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to file state record (see #03287)
                DWORD   pointer to filename
                WORD    length of filename
                WORD    ???
                WORD    suppress buffering if nonzero
Return: AX = status
        STACK unchanged
SeeAlso: INT 60/DI=0500h
--------b-60----DI0502-----------------------
INT 60 u - HP 95LX System Manager - CREATE NEW FILE
        DI = 0502h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to file state record (see #03287)
                DWORD   pointer to filename
                WORD    length of filename
                WORD    ???
                WORD    suppress buffering if nonzero
Return: AX = status
        STACK unchanged
SeeAlso: INT 60/DI=0500h,INT 60/DI=0503h
--------b-60----DI0503-----------------------
INT 60 u - HP 95LX System Manager - CREATE OR TRUNCATE FILE
        DI = 0503h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to file state record (see #03287)
                DWORD   pointer to filename
                WORD    length of filename
                WORD    ???
                WORD    suppress buffering if nonzero
Return: AX = status
        STACK unchanged
SeeAlso: INT 60/DI=0502h
--------b-60----DI0504-----------------------
INT 60 u - HP 95LX System Manager - READ FROM FILE
        DI = 0504h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to file state record (see #03287)
                DWORD   pointer to data buffer
                WORD    number of bytes to read
                DWORD   pointer to WORD in which to return actual bytes read
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0505h
--------b-60----DI0505-----------------------
INT 60 - HP 95LX System Manager - WRITE TO FILE
        DI = 0505h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to file state record (see #03287)
                DWORD   pointer to data
                WORD    length of data
Return: AX = status
        STACK unchanged
SeeAlso: INT 60/DI=0504h
--------b-60----DI0506-----------------------
INT 60 u - HP 95LX System Manager - SET FILE POSITION
        DI = 0506h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to file state record (see #03287)
                2 WORDs ???
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0507h
--------b-60----DI0507-----------------------
INT 60 u - HP 95LX System Manager - GET FILE POSITION
        DI = 0507h "M_TELL"
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to file state record (see #03287)
                DWORD   pointer to DWORD buffer for file position???
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0506h
--------b-60----DI0508-----------------------
INT 60 u - HP 95LX System Manager - CLOSE FILE
        DI = 0508h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to file state record (see #03287)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0500h
--------b-60----DI0509-----------------------
INT 60 u - HP 95LX System Manager - FILE SERVICE "M_SETPAT"
        DI = 0509h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                DWORD   pointer to ???
                WORD    ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI050A-----------------------
INT 60 u - HP 95LX System Manager - FILE SERVICE "M_MATCH"
        DI = 050Ah
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ??? (see #03289)
                DWORD   pointer to ???
Return: ???
        STACK unchanged

Format of HP 95LX pattern match control block:
Offset  Size    Description     (Table 03289)
 00h 43 BYTEs   FindFirst data block (see #01626 at INT 21/AH=4Eh)
 2Bh 80 BYTEs   full path name
 7Bh    BYTE    offset of last component of filename
 7Ch    BYTE    DOS function number (4Eh or 4Fh)
--------b-60----DI050B-----------------------
INT 60 u - HP 95LX System Manager - IDENTIFY FILENAME REFERENT
        DI = 050Bh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
                WORD    ???
                DWORD   pointer to ???
Return: ??? = result (see #03290)
        ???
        STACK unchanged

(Table 03290)
Values returned by HP 95LX System Manager:
 0000h  nonexistent
 0001h  file
 0002h  directory
 0003h  character device
--------b-60----DI050C-----------------------
INT 60 u - HP 95LX System Manager - DELETE FILE
        DI = 050Ch "M_DELETE"
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI050D-----------------------
INT 60 u - HP 95LX System Manager - RENAME FILE
        DI = 050Dh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
                WORD    ???
                DWORD   pointer to ???
                WORD    ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI050E-----------------------
INT 60 u - HP 95LX System Manager - FILE SERVICE "M_GETDIR"
        DI = 050Eh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                DWORD   pointer to ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI050F-----------------------
INT 60 u - HP 95LX System Manager - FILE SERVICE "M_SETDIR"
        DI = 050Fh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0510-----------------------
INT 60 u - HP 95LX System Manager - FILE SERVICE "M_VOLUME"
        DI = 0510h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0511-----------------------
INT 60 u - HP 95LX System Manager - MAKE A SUBDIRECTORY
        DI = 0511h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
                WORD    ???
Return: ???
        STACK unchanged
SeeAlso: INT 21/AH=39h,INT 60/DI=0512h
--------b-60----DI0512-----------------------
INT 60 u - HP 95LX System Manager - REMOVE A SUBDIRECTORY
        DI = 0512h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
                WORD    ???
Return: ???
        STACK unchanged
SeeAlso: INT 21/AH=3Ah,INT 60/DI=0511h
--------b-60----DI0513-----------------------
INT 60 u - HP 95LX System Manager - GET DEFAULT DRIVE
        DI = 0513h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ??? buffer for current drive
Return: ???
        STACK unchanged
SeeAlso: INT 21/AH=19h,INT 60/DI=0514h
--------b-60----DI0514-----------------------
INT 60 u - HP 95LX System Manager - SET DEFAULT DRIVE
        DI = 0514h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    new drive
Return: ???
        STACK unchanged
SeeAlso: INT 21/AH=0Eh"DOS 1+",INT 60/DI=0513h
--------b-60----DI0515-----------------------
INT 60 u - HP 95LX System Manager - FILE SERVICE "M_FDATE"
        DI = 0515h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0516-----------------------
INT 60 u - HP 95LX System Manager - FILE SERVICE "M_GET_SYSDIR"
        DI = 0516h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0517-----------------------
INT 60 u - HP 95LX System Manager - GET FILE ATTRIBUTES
        DI = 0517h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
                WORD    ???
                DWORD   pointer to ??? buffer for file's attributes???
Return: ???
        STACK unchanged
SeeAlso: INT 21/AX=4300h,INT 60/DI=0518h
--------b-60----DI0518-----------------------
INT 60 u - HP 95LX System Manager - SET FILE ATTRIBUTES
        DI = 0518h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
                WORD    ???
                WORD    new attributes???
Return: ???
        STACK unchanged
SeeAlso: INT 21/AX=4301h,INT 60/DI=0517h
--------b-60----DI0519-----------------------
INT 60 u - HP 95LX System Manager - FILE SERVICE "M_COMMON_OPEN"
        DI = 0519h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                DWORD   pointer to ???
                WORD    ???
                WORD    ???
                WORD    ???
                WORD    ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI051A-----------------------
INT 60 u - HP 95LX System Manager - FILE SERVICE "M_COPYDT"
        DI = 051Ah
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI051B-----------------------
INT 60 u - HP 95LX System Manager - FILE SERVICE "M_GETFDT"
        DI = 051Bh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI051C-----------------------
INT 60 u - HP 95LX System Manager - FILE SERVICE "M_PUTFDT"
        DI = 051Ch
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0600-----------------------
INT 60 u - HP 95LX System Manager - PROCESS INITIALIZING
        DI = 0600h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
SeeAlso: INT 15/AX=4DD4h,INT 60/DI=0601h,INT 61"HP 95LX"
--------b-60----DI0601-----------------------
INT 60 u - HP 95LX System Manager - PROCESS TERMINATION
        DI = 0601h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: never
        STACK unchanged
SeeAlso: INT 21/AH=4Ch,INT 2F/AX=1122h,INT 60/DI=0600h
--------b-60----DI0602-----------------------
INT 60 u - HP 95LX System Manager - "M_LOCK" - PREVENT TASK SWITCHES
        DI = 0602h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
SeeAlso: INT 15/AX=101Bh,INT 2F/AX=1681h,INT 60/DI=0603h
--------b-60----DI0603-----------------------
INT 60 u - HP 95LX System Manager - "M_UNLOCK" - ALLOW TASK SWITCHES
        DI = 0603h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
SeeAlso: INT 15/AX=101Ch,INT 2F/AX=1682h,INT 60/DI=0602h
--------b-60----DI0604-----------------------
INT 60 u - HP 95LX System Manager - "M_SPAWN"
        DI = 0604h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
                WORD    ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
SeeAlso: INT 21/AH=4Bh
--------b-60----DI0605-----------------------
INT 60 u - HP 95LX System Manager - "M_APPCOUNT"
        DI = 0605h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
--------b-60----DI0606-----------------------
INT 60 u - HP 95LX System Manager - "M_REBOOT"
        DI = 0606h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
SeeAlso: INT 14/AH=17h"FOSSIL",INT 19
--------b-60----DI0607-----------------------
INT 60 u - HP 95LX System Manager - "M_SPAWNARG"
        DI = 0607h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
                DWORD   pointer to ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0608-----------------------
INT 60 u - HP 95LX System Manager - "M_REG_APP_NAME"
        DI = 0608h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0609-----------------------
INT 60 u - HP 95LX System Manager - "M_APP_NAME"
        DI = 0609h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: DX:AX -> ???
        STACK unchanged
SeeAlso: INT 15/AX=4DD4h,INT 61"HP 95LX",INT 62"HP 95LX"
--------b-60----DI0700-----------------------
INT 60 u - HP 95LX System Manager - OPEN CLIPBOARD
        DI = 0700h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ??? = error code (see #03291)
        ???
        STACK unchanged
SeeAlso: INT 60/DI=0701h,INT 60/DI=0702h

(Table 03291)
Values for HP 95LX error code:
 0000h  successful
 FFF8h  transfer request out of bounds
 FFF9h  no such representation
 FFFAh  no representation open
 FFFBh  a representation is already open
 FFFCh  representation already exists
 FFFDh  heap allocation failure
 FFFEh  clipboard not open
 FFFFh  clipboard access denied
--------b-60----DI0701-----------------------
INT 60 u - HP 95LX System Manager - CLOSE CLIPBOARD
        DI = 0701h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0700h,INT 60/DI=0702h
--------b-60----DI0702-----------------------
INT 60 u - HP 95LX System Manager - RESET CLIPBOARD
        DI = 0702h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0700h
--------b-60----DI0704-----------------------
INT 60 u - HP 95LX System Manager - "M_NEW_REP" - START A NEW REPRESENTATION???
        DI = 0704h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0705h,INT 60/DI=0706h,INT 60/DI=0707h
--------b-60----DI0705-----------------------
INT 60 u - HP 95LX System Manager - CLIPBOARD SERVICE "M_FINI_REP"
        DI = 0705h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0704h
--------b-60----DI0706-----------------------
INT 60 u - HP 95LX System Manager - CLIPBOARD SERVICE "M_REP_NAME"
        DI = 0706h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                DWORD   pointer to ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0704h,INT 60/DI=0707h
--------b-60----DI0707-----------------------
INT 60 u - HP 95LX System Manager - CLIPBOARD SERVICE "M_REP_INDEX"
        DI = 0707h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                DWORD   pointer to ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0704h,INT 60/DI=0706h
--------b-60----DI0708-----------------------
INT 60 u - HP 95LX System Manager - WRITE TO CLIPBOARD
        DI = 0708h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to data to be written???
                WORD    length of data???
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0709h
--------b-60----DI0709-----------------------
INT 60 u - HP 95LX System Manager - READ FROM CLIPBOARD
        DI = 0709h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                WORD    ???
                DWORD   pointer to buffer for data???
                WORD    length of buffer???
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0708h
--------b-60----DI0800-----------------------
INT 60 u - HP 95LX System Manager - BEEP
        DI = 0800h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0801h,INT 60/DI=0802h,INT 60/DI=0803h
--------b-60----DI0801-----------------------
INT 60 u - HP 95LX System Manager - SOUND SERVICE "M_THUD"
        DI = 0801h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0800h,INT 60/DI=0802h,INT 60/DI=0803h
--------b-60----DI0802-----------------------
INT 60 u - HP 95LX System Manager - MAKE A SOUND PATTERN
        DI = 0802h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    pattern number (00h-06h)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0800h,INT 60/DI=0801h,INT 60/DI=0803h
--------b-60----DI0803-----------------------
INT 60 u - HP 95LX System Manager - TURN OFF SOUND
        DI = 0803h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0800h,INT 60/DI=0801h,INT 60/DI=0802h
--------b-60----DI0900-----------------------
INT 60 - HP 95LX System Manager - ALLOCATE REGULAR MEMORY BLOCK
        DI = 0900h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    size of block in bytes
Return: AX -> memory block
        STACK unchanged
Note:   System Manager-compliant applications are always small-model (64K code,
          64K data)
SeeAlso: INT 15/AX=4DD4h,INT 60/DI=0902h,INT 60/DI=0903h
--------b-60----DI0902-----------------------
INT 60 u - HP 95LX System Manager - FREE REGULAR MEMORY BLOCK
        DI = 0902h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    offset of memory block???
Return: ???
        STACK unchanged
Note:   System Manager-compliant applications are always small-model (64K code,
          64K data)
SeeAlso: INT 60/DI=0900h,INT 60/DI=0904h
--------b-60----DI0903-----------------------
INT 60 u - HP 95LX System Manager - ALLOCATE LARGE MEMORY BLOCK
        DI = 0903h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    size of block in bytes???
Return: AX -> memory block???
        STACK unchanged
SeeAlso: INT 60/DI=0900h,INT 60/DI=0904h
--------b-60----DI0904-----------------------
INT 60 u - HP 95LX System Manager - FREE LARGE MEMORY BLOCK
        DI = 0904h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    segment of memory block???
Return: AX -> ???
        STACK unchanged
SeeAlso: INT 60/DI=0902h,INT 60/DI=0903h
--------b-60----DI0B00-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVICE "M_DTINFO"
        DI = 0B00h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0B01-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVICE "M_GETDTM"
        DI = 0B01h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0B02-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVICE "M_SETDTM"
        DI = 0B02h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0B03-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVICE "M_XALARM"
        DI = 0B03h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0B04-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVICE "M_ALARM"
        DI = 0B04h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to alarm record??? (see #03292)
                WORD    ???
Return: ???
        STACK unchanged

Format of HP 95LX alarm record:
Offset  Size    Description     (Table 03292)
 00h    BYTE    hour
 01h    BYTE    minute
 02h    BYTE    second
 03h    BYTE    unused padding
 04h    WORD    rescheduling interval, in seconds
 06h    BYTE    are seconds significant?
 07h    BYTE    alarm sound
 08h 40 BYTEs   message displayed when alarm activates
 30h    BYTE    task ID of owner
 31h    BYTE    application's own use for sub-class
 32h  4 BYTEs   application's own use for private data
--------b-60----DI0B05-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVICE "M_START_SW"
        DI = 0B05h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0B06-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVICE "M_GET_SW"
        DI = 0B06h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                DWORD   pointer to ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0B07-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVICE "M_STOP_SW"
        DI = 0B07h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0B08-----------------------
INT 60 u - HP 95LX System Manager - "M_TELLTIME" - DISPLAY TIMESTAMP
        DI = 0B08h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    timestamp format (see #03293)
                WORD    row (-3 is topmost, 0 is first non-reserved line)
                WORD    column
Return: ???
        STACK unchanged

Bitfields for HP 95LX timestamp format:
Bit(s)  Description     (Table 03293)
 1-0    timestamp components
        00 date only
        01 time only
        10 date and time
        11 day and date
 4      supply am/pm
 5      supply seconds
 6      show year
 7      four-digit year
--------b-60----DI0B09-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVICE "M_GET_SETTINGS"
        DI = 0B09h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ??? (see #03294)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0B0Ah,INT 60/DI=0B0Fh

Format of HP 95LX system settings:
Offset  Size    Description     (Table 03294)
 00h    WORD    country code
 02h    WORD    speaker volume (00h-03h or FFh for off)
 04h    WORD    contrast level (00h-0Fh)
 06h    WORD    week start (00h Sunday, 01h Monday)
 08h    WORD    punctuation format (see #03295)
 0Ah    WORD    two-character language code (only 5355h = "US" byte-swapped)
 0Ch    WORD    current date format (see #03296)
 0Eh    WORD    current time format (see #03297)
 10h    WORD    collating sequence
                00h numbers first, 01h letters first, 02h ASCII
 12h 80 BYTEs   name of picture file
 62h 30 BYTEs   name
 80h 30 BYTEs   title
 9Eh 28 BYTEs   company name
 BAh    WORD    number of languages
 BCh  6 BYTEs   available languages
 C2h 66 BYTEs   language menu
104h  2 BYTEs   ASCIZ date separator
106h  2 BYTEs   ASCIZ time separator
108h    BYTE    date order
109h    BYTE    use 24 hour time?
10Ah 16 BYTEs   currency string
11Ah    WORD    currency string position (00h prefix, 01h suffix)
11Ch    WORD    keyboard (see #03298)
11Eh    WORD    printer baud rate
                00h 300, 01h 1200, 02h 2400, 03h 4800, 04h 9600, 05h 19200
120h    WORD    printer driver code
                00h Epson FX80, 01h HP Laserjet, 02h IBM ProPrinter
122h    WORD    printer interface (00h COM1, 01h COM2, 02h IR, 03h LPT1)
124h    WORD    system manager interrupt (60h by default)
126h    WORD    code page (01h CP850, 02h CP437)
128h    WORD    active exit key
12Ah    WORD    active menu key
12Ch    WORD    active CHAR key toggle
12Eh  6 BYTEs   alarm

(Table 03295)
Values for HP 95LX punctuation format:
 code   decimal arg     thousands
 00h    .       ,       ,
 01h    ,       .       .
 02h    .       ;       ;
 03h    ,       ;       .
 04h    .       ,       " "
 05h    ,       .       " "
 06h    .       ;       " "
 07h    ,       ;       " "

(Table 03296)
Values for HP 95LX current date format:
 00h    dd-mmm-yy
 01h    dd-mmm
 02h    mmm-yy
 03h    mm/dd/yy
 04h    dd/mm/yy
 05h    dd.mm.yy
 06h    yy-mm-dd
 07h    mm/dd
 08h    dd/mm
 09h    dd.mm
 0Ah    mm-dd

(Table 03297)
Values for HP 95LX current time format:
 00h    HH:MM:SS am/pm
 01h    HH:MM am/pm
 02h    HH:MM:SS
 03h    HH.MM.SS
 04h    HH,MM,SS
 05h    HHhMMmSSs
 06h    HH:MM
 07h    HH.MM
 08h    HH,MM
 09h    HHhMMm

(Table 03298)
Values for HP 95LX keyboard layout:
 0001h  Belgium
 0002h  French Canadian
 0004h  Denmark
 0008h  Finland
 0010h  French
 0020h  Finland
 0040h  Italy
 0080h  Netherlands
 0100h  Norway
 0200h  Portugal
 0400h  Spain
 0800h  Sweden
 1000h  Swiss French
 2000h  Swiss German
 4000h  United Kingdom
 8000h  USA
--------b-60----DI0B0A-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVICE "M_SET_SETTINGS"
        DI = 0B0Ah
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0B09h
--------b-60----DI0B0B-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVICE "M_START_TIMER"
        DI = 0B0Bh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0B0Ch,INT 60/DI=0B0Dh
--------b-60----DI0B0C-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVICE "M_STOP_TIMER"
        DI = 0B0Ch
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0B0Bh,INT 60/DI=0B0Dh
--------b-60----DI0B0D-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVICE "M_GET_TIMER"
        DI = 0B0Dh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                DWORD   pointer to ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0B0Bh,INT 60/DI=0B0Ch
--------b-60----DI0B0E-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVICE "M_TELL_ANYTIME"
        DI = 0B0Eh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                WORD    ???
                WORD    ???
                DWORD   pointer to ???
                DWORD   pointer to ???
Return: DX:AX -> ???
        STACK unchanged
--------b-60----DI0B0F-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVCE "M_GET_SETTINGS_ADDR"
        DI = 0B0Fh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: DX:AX -> system settings record (see #03294)
        STACK unchanged
SeeAlso: INT 60/DI=0B09h
--------b-60----DI0B10-----------------------
INT 60 u - HP 95LX System Manager - PARSE DATE SPECIFICATION
        DI = 0B10h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                DWORD   pointer to ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0B11-----------------------
INT 60 u - HP 95LX System Manager - PARSE TIME SPECIFICATION
        DI = 0B11h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                DWORD   pointer to ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0B12-----------------------
INT 60 u - HP 95LX System Manager - SET DATE PARSING RULE
        DI = 0B12h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    new parsing rule (see #03299)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0B13h

(Table 03299)
Values for HP 95LX date parsing rule:
 01h    day-month-year
 02h    month-day-year
 03h    year-month-day
 04h    "DMYO"
 05h    "MDYO"
 OR with 08h to get any year
--------b-60----DI0B13-----------------------
INT 60 u - HP 95LX System Manager - SET TIME PARSING RULE
        DI = 0B13h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    new parsing rule (see #03300)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0B12h

(Table 03300)
Values for HP 95LX time parsing rule:
 01h    HH:MM:SS (am/pm)
 02h    HH:MM:SS (24hr)
 03h    HHMM:SS (24hr)
 04h    HH:MM:SS.hh (24hr)
 05h    HH:MM (am/pm)
 06h    HH:MM (24hr)
 07h    HHMM (24hr)
--------b-60----DI0B14-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVICE "M_POST_TIME"
        DI = 0B14h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
--------b-60----DI0B15-----------------------
INT 60 u - HP 95LX System Manager - CLOCK/CALENDAR SERVICE "M_DAY_TRIGGER"
        DI = 0B15h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
Return: ???
        STACK unchanged
SeeAlso: INT 15/AX=4DD4h,INT 61"HP 95LX",INT 62"HP 95LX"
--------b-60----DI0C00-----------------------
INT 60 u - HP 95LX System Manager - OPEN PRINTER
        DI = 0C00h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0C01h,INT 60/DI=0C02h,INT 60/DI=0C03h
--------b-60----DI0C01-----------------------
INT 60 u - HP 95LX System Manager - CLOSE PRINTER
        DI = 0C01h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
Note:   relinquishes control of printer
SeeAlso: INT 60/DI=0C00h
--------b-60----DI0C02-----------------------
INT 60 u - HP 95LX System Manager - WRITE TO PRINTER
        DI = 0C02h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to data to be written
                WORD    length of data
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0C00h
--------b-60----DI0C03-----------------------
INT 60 u - HP 95LX System Manager - INITIALIZE PRINTER
        DI = 0C03h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0C00h
--------b-60----DI0C04-----------------------
INT 60 u - HP 95LX System Manager - "M_TRANS_PRINTER"
        DI = 0C04h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0C05-----------------------
INT 60 u - HP 95LX System Manager - "M_FALL_PRINTER"
        DI = 0C05h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
SeeAlso: INT 15/AX=4DD4h,INT 61"HP 95LX",INT 62"HP 95LX"
--------b-60----DI0E00-----------------------
INT 60 u - HP 95LX System Manager - COMMUNICATIONS SERVICE "M_COMM_INIT"
        DI = 0E00h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
SeeAlso: #03301,INT 60/DI=0E01h,INT 60/DI=0E02h

(Table 03301)
Values for HP 95LX error code:
 0000h  successful
 FFF1h  "E_BUSY"
 FFF2h  timeout
 FFF3h  framing error
 FFF4h  parity error
 FFF5h  overrun error
 FFF6h  "E_EMPTY"
 FFF7h  "E_CONECT"
 FFF8h  not open
 FFF9h  out of memory
 FFFAh  buffer overflow
 FFFBh  "E_NOFIT"
 FFFCh  unsupported
 FFFDh  "E_IVOPR"
 FFFEh  "E_IVCHN"
 FFFFh  "E_REOPEN"
--------b-60----DI0E01-----------------------
INT 60 u - HP 95LX System Manager - OPEN COMMUNICATIONS CHANNEL
        DI = 0E01h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to WORD buffer for comm channel handle
                WORD    communications line number (01h-04h)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0E00h,INT 60/DI=0E02h
--------b-60----DI0E02-----------------------
INT 60 u - HP 95LX System Manager - CLOSE COMMUNICATIONS CHANNEL
        DI = 0E02h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    comm channel handle
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0E00h,INT 60/DI=0E01h
--------b-60----DI0E03-----------------------
INT 60 u - HP 95LX System Manager - "M_COMM_GETMDM"
        DI = 0E03h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0E04-----------------------
INT 60 u - HP 95LX System Manager - "M_COMM_ANSWER"
        DI = 0E04h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0E05-----------------------
INT 60 u - HP 95LX System Manager - "M_COMM_DIAL"
        DI = 0E05h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0E06-----------------------
INT 60 u - HP 95LX System Manager - RESET COMMUNICATIONS CHANNEL
        DI = 0E06h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    comm channel handle
                WORD    reset options (see #03302)
Return: ???
        STACK unchanged

Bitfields for HP 95LX reset options:
Bit(s)  Description     (Table 03302)
 0      reset line
 1      flush transmit buffer
 2      flush receive buffer
 3      reset modem
 4      reset receiver's ^S state
 5      reset transmitter's ^S state
--------b-60----DI0E07-----------------------
INT 60 u - HP 95LX System Manager - "M_COMM_HANGUP"
        DI = 0E07h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0E08-----------------------
INT 60 u - HP 95LX System Manager - SEND DATA OVER COMM CHANNEL
        DI = 0E08h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    comm channel handle
                DWORD   pointer to data to be sent
                WORD    option flags
                        bit 0: send partial buffer
                        bit 1: turn on receiver after sending
                DWORD   pointer to WORD containing length of data to be sent
Return: length WORD updated to contain number of bytes actually sent???
        STACK unchanged
SeeAlso: INT 60/DI=0E09h,INT 60/DI=0E0Bh
--------b-60----DI0E09-----------------------
INT 60 u - HP 95LX System Manager - QUERY COMM CHANNEL TRANSMIT QUEUE
        DI = 0E09h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                DWORD   pointer to ??? WORD
                DWORD   pointer to ??? WORD
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0E0Ah
--------b-60----DI0E0A-----------------------
INT 60 u - HP 95LX System Manager - QUERY COMM CHANNEL RECEIVE QUEUE
        DI = 0E0Ah
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    comm channel handle
                DWORD   pointer to WORD to get receive buffer size
                DWORD   pointer to WORD to get free bytes in receive buffer
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0E09h,INT 60/DI=0E0Bh
--------b-60----DI0E0B-----------------------
INT 60 u - HP 95LX System Manager - RECEIVE DATA FROM COMM CHANNEL
        DI = 0E0Bh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    comm channel handle
                DWORD   pointer to data buffer
                DWORD   pointer to WORD (call) length of data buffer
                                        (ret) number of bytes received
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0E08h,INT 60/DI=0E0Ah
--------b-60----DI0E0C-----------------------
INT 60 u - HP 95LX System Manager - "M_COMM_HAZCMD"
        DI = 0E0Ch
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                DWORD   pointer to ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0E0D-----------------------
INT 60 u - HP 95LX System Manager - "M_COMM_COMAND"
        DI = 0E0Dh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                DWORD   pointer to ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0E0E-----------------------
INT 60 u - HP 95LX System Manager - "M_COMM_BREAK"
        DI = 0E0Eh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0E0F-----------------------
INT 60 u - HP 95LX System Manager - "M_COMM_FRCXON"
        DI = 0E0Fh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0E10-----------------------
INT 60 u - HP 95LX System Manager - "M_COMM_FRCXOF"
        DI = 0E10h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0E11-----------------------
INT 60 u - HP 95LX System Manager - "M_COMM_SETDTR"
        DI = 0E11h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0E12-----------------------
INT 60 u - HP 95LX System Manager - "M_COMM_XMITNG"
        DI = 0E12h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0E13-----------------------
INT 60 u - HP 95LX System Manager - "M_COMM_STATUS"
        DI = 0E13h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0E14-----------------------
INT 60 u - HP 95LX System Manager - SET COMMUNICATIONS SETTINGS
        DI = 0E14h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    comm channel handle
                DWORD   pointer to communications settings (see #03303)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0E15h

Format of HP 95LX communications settings:
Offset  Size    Description     (Table 03303)
 00h    BYTE    dial type ('T' tone, 'P' pulse)
 01h    WORD    baud rate divisor (115200/baud_rate)
 03h    BYTE    parity (00h none, 08h odd, 18h even, 28h mark, 38h space)
 04h    BYTE    stop bits (00h one, 04h two)
 05h    BYTE    data bits - 5
 06h    BYTE    software handshake
                01h none, 02h XOFF/XON, 04h XOFF/any, 08h ENQ/ACK
 07h    BYTE    infrared (01h off, 02h on)
 08h    BYTE    duplex (01h half, 02h full)
 09h    BYTE    echo (01h echo, 02h no echo)
--------b-60----DI0E15-----------------------
INT 60 u - HP 95LX System Manager - GET COMMUNICATIONS SETTINGS
        DI = 0E15h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                DWORD   pointer to buffer for settings (see #03303)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0E14h
--------b-60----DI0E16-----------------------
INT 60 u - HP 95LX System Manager - "M_COMM_CNFGUR"
        DI = 0E16h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                WORD    ???
                WORD    ???
                WORD    ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI0E17-----------------------
INT 60 u - HP 95LX System Manager - "M_COMM_QRYERR"
        DI = 0E17h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
Return: ???
        STACK unchanged
SeeAlso: INT 15/AX=4DD4h,INT 61"HP 95LX",INT 62"HP 95LX"
--------b-60----DI0F00-----------------------
INT 60 u - HP 95LX System Manager - "M_ERRMSG"
        DI = 0F00h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
                DWORD   pointer to ???
                WORD    ???
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0F01-----------------------
INT 60 u - HP 95LX System Manager - DRAW STANDARD TITLE BOX
        DI = 0F01h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ASCIZ title string
Return: ???
        STACK unchanged
--------b-60----DI0F02-----------------------
INT 60 u - HP 95LX System Manager - "SHOWNAME"
        DI = 0F02h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI0F03-----------------------
INT 60 u - HP 95LX System Manager - DISPLAY TWO-LINE MESSAGE BOX
        DI = 0F03h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to first line of message
                WORD    length of first line
                DWORD   pointer to second line of message
                WORD    length of second line
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0300h,INT 60/DI=0F04h,INT 60/DI=0F09h
--------b-60----DI0F04-----------------------
INT 60 u - HP 95LX System Manager - REMOVE MESSAGE BOX
        DI = 0F04h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0F03h,INT 60/DI=0F09h
--------b-60----DI0F05-----------------------
INT 60 u - HP 95LX System Manager - "M_COM_TIMER_ADDR"
        DI = 0F05h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: DX:AX -> ???
        STACK unchanged
--------b-60----DI0F06-----------------------
INT 60 u - HP 95LX System Manager - "M_COM_TIMER_COUNT_ADDR"
        DI = 0F06h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: DX:AX -> ???
        STACK unchanged
--------b-60----DI0F07-----------------------
INT 60 u - HP 95LX System Manager - "M_SYS_RSRC_ADDR"
        DI = 0F07h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: DX:AX -> ???
        STACK unchanged
--------b-60----DI0F08-----------------------
INT 60 u - HP 95LX System Manager - "M_BIOS_OUTSTR"
        DI = 0F08h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
--------b-60----DI0F09-----------------------
INT 60 u - HP 95LX System Manager - DISPLAY THREE-LINE MESSAGE BOX
        DI = 0F09h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to first line of message
                WORD    length of first line
                DWORD   pointer to second line of message
                WORD    length of second line
                DWORD   pointer to third line of message
                WORD    length of third line
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0F03h,INT 60/DI=0F04h
--------b-60----DI0F0A-----------------------
INT 60 u - HP 95LX System Manager - DISABLE MACROS
        DI = 0F0Ah
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0F0Bh
--------b-60----DI0F0B-----------------------
INT 60 u - HP 95LX System Manager - ENABLE MACROS
        DI = 0F0Bh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
SeeAlso: INT 60/DI=0F0Ah
--------b-60----DI0F0C-----------------------
INT 60 u - HP 95LX System Manager - "M_DATE_TIME_SEPS"
        DI = 0F0Ch
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
--------b-60----DI0F0D-----------------------
INT 60 u - HP 95LX System Manager - "M_FORM_FT"
        DI = 0F0Dh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: DX:AX -> ???
        STACK unchanged
--------b-60----DI0F0E-----------------------
INT 60 u - HP 95LX System Manager - "M_RAM_IV_INFO"
        DI = 0F0Eh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: DX:AX -> ???
        STACK unchanged
SeeAlso: INT 15/AX=4DD4h,INT 61"HP 95LX",INT 62"HP 95LX"
--------b-60----DI1005-----------------------
INT 60 u - HP 95LX System Manager - "M_DIRTY_SYNC" - FORCE SCREEN UPDATE
        DI = 1005h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
SeeAlso: INT 10/AH=FFh,INT 60/DI=0300h,INT 60/DI=0301h
--------b-60----DI1200-----------------------
INT 60 u - HP 95LX System Manager - RESOURCE SERVICE "MAP_RESOURCE_FILE"
        DI = 1200h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI1201-----------------------
INT 60 u - HP 95LX System Manager - "GET_RESOURCE_PTR"
        DI = 1201h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    ???
Return: DX:AX -> ???
        STACK unchanged
SeeAlso: INT 15/AX=4DD4h,INT 61"HP 95LX",INT 62"HP 95LX"
--------b-60----DI1202-----------------------
INT 60 u - HP 95LX System Manager - "GET_RSRC_TAB_PTR"
        DI = 1202h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: DX:AX -> ???
        STACK unchanged
--------b-60----DI1203-----------------------
INT 60 u - HP 95LX System Manager - "INIT_SYSMGR_RSRCS"
        DI = 1203h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: ???
        STACK unchanged
--------b-60----DI1300-----------------------
INT 60 u - HP 95LX System Manager - INITIALIZE HELP SYSTEM
        DI = 1300h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                DWORD   pointer to ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI1301-----------------------
INT 60 u - HP 95LX System Manager - DISPLAY HELP
        DI = 1301h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
--------b-60----DI1302-----------------------
INT 60 u - HP 95LX System Manager - "M_HELP_KEY"
        DI = 1302h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI1303-----------------------
INT 60 u - HP 95LX System Manager - "M_HELP_TERM"
        DI = 1303h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
Return: ???
        STACK unchanged
SeeAlso: INT 15/AX=4DD4h,INT 61"HP 95LX",INT 62"HP 95LX"
--------b-60----DI1400-----------------------
INT 60 u - HP 95LX System Manager - "M_ColInit"
        DI = 1400h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
Return: AX = ???
        STACK unchanged
--------b-60----DI1401-----------------------
INT 60 u - HP 95LX System Manager - "M_ColCpStr"
        DI = 1401h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
                DWORD   pointer to ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI1402-----------------------
INT 60 u - HP 95LX System Manager - "M_ColLicsStr"
        DI = 1402h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
--------b-60----DI1403-----------------------
INT 60 u - HP 95LX System Manager - "M_ColLicsChar"
        DI = 1403h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
--------b-60----DI1404-----------------------
INT 60 u - HP 95LX System Manager - "M_ColToLower"
        DI = 1404h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI1405-----------------------
INT 60 u - HP 95LX System Manager - "M_ColCpSearch"
        DI = 1405h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
                DWORD   pointer to ???
                WORD    ???
                WORD    ???
Return: ???
        STACK unchanged
--------b-60----DI1406-----------------------
INT 60 u - HP 95LX System Manager - "M_ColToUpper"
        DI = 1406h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                DWORD   pointer to ???
                WORD    ???
Return: ???
        STACK unchanged
SeeAlso: INT 15/AX=4DD4h,INT 61"HP 95LX",INT 62"HP 95LX"
--------b-60----DI1500-----------------------
INT 60 u - HP 95LX System Manager - "GrDispInit"
        DI = 1500h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
--------b-60----DI1501-----------------------
INT 60 u - HP 95LX System Manager - "GrDispClear"
        DI = 1501h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
--------b-60----DI1502-----------------------
INT 60 u - HP 95LX System Manager - "GrDispDot"
        DI = 1502h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
--------b-60----DI1503-----------------------
INT 60 u - HP 95LX System Manager - "GrDispDraw"
        DI = 1503h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
--------b-60----DI1504-----------------------
INT 60 u - HP 95LX System Manager - "GrDispFill"
        DI = 1504h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
--------b-60----DI1505-----------------------
INT 60 u - HP 95LX System Manager - "GrDispRead"
        DI = 1505h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
--------b-60----DI1506-----------------------
INT 60 u - HP 95LX System Manager - "GrDispString"
        DI = 1506h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
--------b-60----DI1507-----------------------
INT 60 u - HP 95LX System Manager - "GrDispPan"
        DI = 1507h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
--------b-60----DI1508-----------------------
INT 60 u - HP 95LX System Manager - "GrDispZoom"
        DI = 1508h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
--------b-60----DI1509-----------------------
INT 60 u - HP 95LX System Manager - "GrDispSave"
        DI = 1509h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
--------b-60----DI150A-----------------------
INT 60 u - HP 95LX System Manager - "GrDispRestore"
        DI = 150Ah
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
--------b-60----DI150B-----------------------
INT 60 u - HP 95LX System Manager - "GrDispCorner"
        DI = 150Bh
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
SeeAlso: INT 15/AX=4DD4h,INT 61"HP 95LX",INT 62"HP 95LX"
--------b-60----DI1604-----------------------
INT 60 u - HP 95LX System Manager - "CP_TO_LICS"
        DI = 1604h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                ???
Return: ???
        STACK unchanged
SeeAlso: INT 15/AX=4DD4h,INT 61"HP 95LX",INT 62"HP 95LX"
--------G-6000-------------------------------
INT 60 - SYS_PROF.EXE - PROFILER STATUS
        AH = 00h
Return: AX = 0000h    profiling is off
            otherwise profiling is on
Note:   SYS_PROF.EXE is the TSR portion of a profiler from Micro Cornucopia
          Issue 47
SeeAlso: AH=01h"SYS_PROF",AH=02h"SYS_PROF"
--------G-6000-------------------------------
INT 60 - MDEBUG - GET STATUS
        AH = 00h
        DS:SI -> password or a null byte
Return: AX = return code
            FFFEh password is invalid
            FFFDh display mode is invalid
            else successful
                ES = value of the monitor register SE
                DI = value of the monitor register OF
                CH = monitor color
                CL = interpreter color
                BH = monitor start line
                BL = interpreter start line
                AH = makecode of the hotkey
                AL = ASCII code of the hotkey
                DL = status of special keys (only SHIFT, ALT, CTRL) for the
                      hotkey (coded as for the keyboard flag at 0040h:0017h)
                DH = basic process number for the communication with drivers
                      process number for the display driver, DH+1 = process
                      number for the command driver(s)
        DS:SI -> MDEBUG identification table (see #03304)
Program: MDEBUG is a shareware memory-resident debugging tool by Bernd
          Schemmer, including a memory monitor, an interpreter, and a
          disassembler
Notes:  MDEBUG uses INT 60 by default, but may be directed to any of INT 60
          through INT 67; the interrupt handler is preceded by the signature
          "USERINT" and is not chained
        if DS:SI points at a null byte, MDEBUG will prompt for a password if
          passwords are active; enough stack space must be provided for an
          INT 10h call (which MDEBUG uses while prompting for the password)
SeeAlso: AH=02h"MDEBUG"
Index:  hotkeys;MDEBUG

Format of MDEBUG identification table:
Offset  Size    Description     (Table 03304)
 -2     WORD    entry offset
 00h    WORD    CS of MDEBUG
 02h    DWORD   old INT 08h vector
 06h    DWORD   old INT 09h vector
 0Ah    DWORD   address INT 16h routine used by MDEBUG
 0Eh    BYTE    length of version string
 0Fh  N BYTEs   version string
--------N-600000-----------------------------
INT 60 - RIFS - CLIENT - INSTALLATION CHECK
        AX = 0000h
Return: AX = 1234h if installed
        CF clear
Program: RIFS is the Remote Installable File System by "kyle"
InstallCheck:   test for the signature "RIFS" immediately preceding the
          interrupt handler
Range:  INT 60 to INT 66 and INT 18,selected by scanning for 0000h:0000h vector
SeeAlso: AX=0001h,AX=0005h,AX=0007h,AX=0008h,INT 2F/AX=5600h
--------N-600001-----------------------------
INT 60 - RIFS - CLIENT - UNINSTALL
        AX = 0001h
Return: CF clear if successful
SeeAlso: AX=0000h,AX=0009h
--------N-600002-----------------------------
INT 60 - RIFS - CLIENT - REMAP DRIVE
        AX = 0002h
        BH = local drive number
        BL = remote drive number
Return: CF clear if successful
        CF set on error
SeeAlso: AX=0000h,AX=0003h,AX=0004h,INT 21/AX=5F03h,INT 21/AX=5F05h"STARLITE"
--------N-600003-----------------------------
INT 60 - RIFS - CLIENT - UNMAP DRIVE
        AX = 0003h
        BL = drive to unmap
Return: CF clear if successful
        CF set on error
SeeAlso: AX=0000h,AX=0002h,AX=0004h,INT 21/AX=5F04h,INT 21/AX=5F06h"STARLITE"
--------N-600004-----------------------------
INT 60 - RIFS - CLIENT - UNMAP ALL DRIVES
        AX = 0004h
Return: CF clear if successful
        CF set on error
SeeAlso: AX=0000h,AX=0002h,AX=0003h
--------N-600005-----------------------------
INT 60 - RIFS - CLIENT - GET TRANSLATION TABLE
        AX = 0005h
Return: CF clear if successful
            ES:BX -> translation table
        CF set on error
SeeAlso: AX=0000h,AX=0006h,AX=0007h
--------N-600006-----------------------------
INT 60 - RIFS - CLIENT - GET STATISTICS TABLE
        AX = 0006h
Return: CF clear if successful
            ES:BX -> statistics table
        CF set on error
SeeAlso: AX=0000h,AX=0005h,AX=0007h,AX=000Ah
--------N-600007-----------------------------
INT 60 - RIFS - CLIENT - GET PORT TRANSLATION TABLE
        AX = 0007h
Return: CF clear if successful
            CX = number of entries
            ES:BX -> port mapping table
        CF set on error
SeeAlso: AX=0000h,AX=0005h
--------N-600008-----------------------------
INT 60 - RIFS - SERVER - INSTALLATION CHECK
        AX = 0008h
Return: CF clear if successful
        CF set on error
InstallCheck:   test for the signature "RIFS" immediately preceding the
          interrupt handler
Range:  INT 60 to INT 66 and INT 18,selected by scanning for 0000h:0000h vector
SeeAlso: AX=0000h,AX=0009h,AX=000Ah,AX=000Bh
--------N-600009-----------------------------
INT 60 - RIFS - SERVER - UNINSTALL
        AX = 0009h
Return: CF clear if successful
        CF set on error
SeeAlso: AX=0001h,AX=0008h
--------N-60000A-----------------------------
INT 60 - RIFS - SERVER - GET STATISTICS TABLE
        AX = 000Ah
Return: CF clear if successful
            ES:BX -> statistics table
        CF set on error
SeeAlso: AX=0006h,AX=0008h,AX=0009h,AX=000Bh
--------N-60000B-----------------------------
INT 60 - RIFS - SERVER - RESET
        AX = 000Bh
Return: CF clear if successful
        CF set on error
Note:   closes all open files
SeeAlso: AX=0008h,AX=0009h
--------G-6001-------------------------------
INT 60 - MDEBUG - GET ADDRESS OF THE HELP REGISTERS
        AH = 01h
        DS:SI -> password or a null byte
Return: AX = return code
            FFFEh password is invalid
            FFFDh display mode is invalid
            else successful
                ES:DI point to the help registers of MDEBUG
               ES:DI-02h  -> R0 (WORD)
               ES:DI      -> R1 (WORD)
               ES:DI+02h  -> R2 (WORD)
               ES:DI+04h  -> R3 (WORD)
               ...
               ES:DI+0Eh  -> R8 (WORD)
--------G-6001-------------------------------
INT 60 - SYS_PROF.EXE - TURN PROFILING OFF
        AH = 01h
Note:   SYS_PROF.EXE is the TSR portion of a profiler from Micro Cornucopia
          Issue 47
SeeAlso: AH=00h"SYS_PROF",AH=02h"SYS_PROF"
--------N-6001FF-----------------------------
INT 60 - FTP Packet Driver - BASIC FUNC - GET DRIVER INFO
        AX = 01FFh
        BX = handle returned by function 02h
Return: CF set on error
            DH = error code (see #03305)
        CF clear if successful
            BX = version
            CH = network interface class (see #03306)
            DX = interface type (see #03306)
            CL = number
            DS:SI -> name
            AL = driver functions supported
                01h basic
                02h basic and extended
                05h basic and high-performance
                06h basic, high-performance, and extended
                FFh not installed
Note:   the handle in BX is optional for drivers written to v1.07 or later of
          the packet driver specification

(Table 03305)
Values for Packet Driver error code:
 01h "BAD_HANDLE"       invalid handle number
 02h "NO_CLASS"         no interfaces of the specified class found
 03h "NO_TYPE"          no interfaces of the specified type found
 04h "NO_NUMBER"        no interfaces of the specified number found
 05h "BAD_TYPE"         bad packet type
 06h "NO_MULTICAST"     interface does not support multicast messages
 07h "CANT_TERMINATE"   this packet driver cannot terminate
 08h "BAD_MODE"         invalid receiver mode
 09h "NO_SPACE"         insufficient space
 0Ah "TYPE_INUSE"       type accessed but never released
 0Bh "BAD_COMMAND"      bad command
 0Ch "CANT_SEND"        packet could not be sent
 0Dh "CANT_SET"         hardware address could not be changed
 0Eh "BAD_ADDRESS"      hardware address has a bad length or format
 0Fh "CANT_RESET"       could not reset interface

(Table 03306)
Values for Packet Driver network interface classes/types:
    Class 01h  Ethernet/IEEE 802.3
        01h 3COM 3C500/3C501
        02h 3COM 3C505
        03h MICOM-Interlan NI5010
        04h BICC Data Networks 4110
        05h BICC Data Networks 4117
        06h MICOM-Interlan NP600
        08h Ungermann-Bass PC-NIC
        09h Univation NC-516
        0Ah TRW PC-2000
        0Bh MICOM-Interlan NI5210
        0Ch 3COM 3C503
        0Dh 3COM 3C523
        0Eh Western Digital WD8003
        0Fh Spider Systems S4
        10h Torus Frame Level
        11h 10Net Communications
        12h Gateway PC-bus
        13h Gateway AT-bus
        14h Gateway MCA-bus
        15h IMC PCnic
        16h IMC PCnic II
        17h IMC PCnic 8-bit
        18h Tigan Communications
        19h Micromatic Research
        1Ah Clarkson "Multiplexor"
        1Bh D-Link 8-bit
        1Ch D-Link 16-bit
        1Dh D-Link PS/2
        1Eh Research Machines 8
        1Fh Research Machines 16
        20h Research Machines MCA
        21h Radix Microsystems EXM1 16-bit
        22h Interlan Ni9210
        23h Interlan Ni6510
        24h Vestra LANMASTER 16-bit
        25h Vestra LANMASTER 8-bit
        26h Allied Telesis PC/XT/AT
        27h Allied Telesis NEC PC-98
        28h Allied Telesis Fujitsu FMR
        29h Ungermann-Bass NIC/PS2
        2Ah Tiara LANCard/E AT
        2Bh Tiara LANCard/E MC
        2Ch Tiara LANCard/E TP
        2Dh Spider Communications SpiderComm 8
        2Eh Spider Communications SpiderComm 16
        2Fh AT&T Starlan NAU
        30h AT&T Starlan-10 NAU
        31h AT&T Ethernet NAU
        32h Intel smart card
        33h Xircom Packet Adapter
        34h Aquila Ethernet
        35h Novell NE1000
        36h Novell NE2000
        37h SMC PC-510
        38h AT&T Fiber NAU
        39h NDIS to Packet Driver adapter
        3Ah Racal-InterLan ES3210
        3Bh General Systems ISDN simulated Ethernet
        3Ch Hewlett-Packard
        3Dh IMC EtherNic-8
        3Eh IMC EtherNic-16
        3Fh IMC EtherNic-MCA
        40h NetWorth EtherNext
        41h Dataco Scanet
        42h DEC DEPCA
        43h C-Net
        44h Gandalf LANLine
        45h Apricot built-in
        46h David Systems Ether-T
        47h ODI to Packet Driver adapter (see also INT 2F/AX=5100h)
        48h AMD Am21110-16
        49h Intel ICD Network controller family
        4Ah Intel ICD PCL2
        4Bh Intel ICD PCL2A
        4Ch AT&T LANPacer
        4Dh AT&T LANPacer+
        4Eh AT&T EVB
        4Fh AT&T StarStation
        50h SLIP simulated ethernet
        51h Racal-Interlan NIA310
        52h Racal-Interlan NISE
        53h Racal-Interlan NISE30
        54h Racal-Interlan NI6610
        55h Ethernet over IP/UDP
        56h ICL EtherTeam 16
        57h David Systems
        58h NCR WaveLAN
        59h Thomas Contrad TC5045
        5Ah Russ Nelson's Parallel Port driver
        5Bh Intell EtherExpress 16
        5Ch IBMTOKEN
        5Dh Zenith Z-Note
        5Eh 3Com 3C509
        5Fh Mylex LNE390
        60h Madge Smart Ringnode
        61h Novell NE2100
        62h Allied Telesis 1500
        63h Allied Telesis 1700
        64h Fujitsu EtherCoupler
    Class 02h  ProNET-10
        01h Proteon p1300
        02h Proteon p1800
    Class 03h  IEEE 802.5/ProNet-4 (without expanded RIFs)
        01h IBM Token-Ring Adapter
        02h Proteon p1340
        03h Proteon p1344
        04h Gateway PC-bus
        05h Gateway AT-bus
        06h Gateway MCA-bus
        07h Madge board
        39h NDIS to Packet Driver adapter
        47h ODI to Packet Driver adapter
    Class 04h  Omninet
    Class 05h  Appletalk
        01h ATALK.SYS adapter
    Class 06h  Serial Line
        01h Clarkson 8250-SLIP
        02h Clarkson "Multiplexor"
        03h Eicon Technologies
    Class 07h  StarLAN (subsumed by Ethernet class)
    Class 08h  ARCnet
        01h Datapoint RIM
    Class 09h  AX.25
        01h Ottawa PI card
        02h Eicon Technologies
    Class 0Ah  KISS
    Class 0Bh  IEEE 802.3 with 802.2 headers
        types same as for class 01h
    Class 0Ch  FDDI with 802.2 headers
        01h Western Digital
        02h Frontier Technology
    Class 0Dh  Internet X.25
        01h Western Digital
        02h Frontier Technology
        03h Emerging Technologies
        04h The Software Forge
        05h Link Data Intelligent X.25
        06h Eicon Technologies
    Class 0Eh  N.T. LANSTAR (encapsulating DIX Ethernet)
        01h NT LANSTAR/8
        02h NT LANSTAR/MC
    Class 0Fh  SLFP (MIT serial specification)
        01h MERIT
    Class 10h  PPP (Point-to-Point Protocol)
        01h 8250/16550 UART
        02h Niwot Networks synch
        03h Eicon Technologies
    Class 11h  802.5 with expanded RIFs
        types same as for class 3
    Class 12h  reserved for LCP/NCPs
Note: class and type numbers are cleared through FTP Software
--------G-6002-------------------------------
INT 60 - MDEBUG - SET STATUS
        AH = 02h
        DS:SI -> password or a null byte
        ES = new value for the register SE
        DI = new value for the register OF
        CH = new monitor color if nonzero
        CL = new interpreter color if nonzero
        BH = new monitor start line if nonzero
        BL = new interpreter start line if nonzero
        AL = new ASCII code for the hotkey ('A'..'Z', 'a'..'z') if nonzero
        DL = new status of the special keys (SHIFT, ALT, CTRL) for the hotkey
              if nonzero
        DH = if nonzero, new basic process number for communication with the
              drivers (DH = multiplex number for the display driver,
              DH+1 = multiplex number for the command driver or drivers)
Return: AX = return code
            FFFFh call not allowed
            FFFEh password is invalid
            FFFDh display mode is invalid
            0000h successful, status changed
            else AL = error reasons (see #03307)
Note:   the values of the registers SE and OF are always changed, the other
          values are only changed if they are valid
SeeAlso: AH=00h"MDEBUG"
Index:  hotkeys;MDEBUG

Bitfields for MDEBUG error reasons:
Bit(s)  Description     (Table 03307)
 0      invalid monitor start line
 1      invalid interpreter start line
 2      invalid hotkey
 3      invalid process number
 4-7    reserved
--------N-6002-------------------------------
INT 60 - FTP Packet Driver - BASIC FUNC - ACCESS TYPE
        AH = 02h
        AL = interface class
        BX = interface type
        DL = interface number
        DS:SI -> type
        CX = length of type (0000h for all packets)
        ES:DI -> receiver function (see #03308)
Return: CF set on error
            DH = error code (see #03305)
        CF clear if successful
            AX = handle
SeeAlso: AH=03h"FTP"

(Table 03308)
Values packet driver receiver is called with when a packet is received:
        AX = subfunction
            00h get packet buffer
                CX = buffer length
                DX = lookahead length (v1.10+)
                DS:SI -> lookahead buffer if DX nonzero (v1.10+)
                DI = error flags (class dependent) (v1.10+)
                Return: ES:DI -> packet buffer
                                0000h:0000h means throw away packet
                        CX = size of buffer (v1.10+), may be smaller than
                              incoming data
            01h copy completed
                DS:SI -> buffer
                CX = bytes actually copied (v1.10+)
        BX = handle
--------G-6002-------------------------------
INT 60 - SYS_PROF.EXE - TURN PROFILING ON
        AH = 02h
Note:   SYS_PROF.EXE is the TSR portion of a profiler from Micro Cornucopia
          Issue 47
SeeAlso: AH=00h"SYS_PROF",AH=01h"SYS_PROF"
--------G-6003-------------------------------
INT 60 - MDEBUG - POP UP
        AH = 03h
        DS:SI -> password or a null byte
        ES -> new value for the register SE
        DI -> new value for the register OF
Return: AX = return code (see #03309)
SeeAlso: AH=04h"MDEBUG"

(Table 03309)
Values for MDEBUG return code:
 FFFFh  call not allowed
 FFFEh  password is invalid
 FFFDh  display mode is invalid
 else   successful
--------N-6003-------------------------------
INT 60 - FTP Packet Driver - BASIC FUNC - RELEASE TYPE
        AH = 03h
        BX = handle
Return: CF set on error
           DH = error code (see #03305)
        CF clear if successful
SeeAlso: AH=02h"FTP"
--------G-6003-------------------------------
INT 60 - SYS_PROF.EXE - GET ADDRESS OF PROFILING TABLE
        AH = 03h
Return: ES:BX -> profiling table
Note:   SYS_PROF.EXE is the TSR portion of a profiler from Micro Cornucopia
          Issue 47
SeeAlso: AH=04h"SYS_PROF"
--------N-6004-------------------------------
INT 60 - FTP Packet Driver - BASIC FUNC - SEND PACKET
        AH = 04h
        DS:SI -> buffer
        CX = length
Return: CF set on error
            DH = error code (see #03305)
        CF clear if successful
Note:   the buffer may be modified immediately upon return from this call
SeeAlso: AH=0Bh
--------G-6004-------------------------------
INT 60 - MDEBUG - POP UP
        AH = 04h
        DS:SI -> password or a null byte
Return: AX = return code (see #03309)
SeeAlso: AH=03h"MDEBUG",AH=07h"MDEBUG"
--------G-6004-------------------------------
INT 60 - SYS_PROF.EXE - CLEAR PROFILING TABLE
        AH = 04h
Note:   SYS_PROF.EXE is the TSR portion of a profiler from Micro Cornucopia
          Issue 47
SeeAlso: AH=03h"SYS_PROF"
--------N-6005-------------------------------
INT 60 - FTP Packet Driver - BASIC FUNC - TERMINATE DRIVER FOR HANDLE
        AH = 05h
        BX = handle (optional for v1.10+)
Return: CF set on error
           DH = error code (see #03305)
        CF clear if successful
--------G-6005-------------------------------
INT 60 - MDEBUG - GET AND SET MDEBUG FLAGS
        AH = 05h
        DS:SI -> password or a null byte
        BL = new value for the semaphor of MDEBUG
             00h  enable popup of MDEBUG
             else disable popup of MDEBUG
Return: AX = return code
            FFFEh password is invalid
            FFFDh display mode is invalid
            else successful
                BL = old value of the semaphor of MDEBUG
                BH = old value of the INT 08h semaphor
                    (this semaphor is always reset after this function)
--------N-6006-------------------------------
INT 60 - FTP Packet Driver - BASIC FUNC - GET ADDRESS
        AH = 06h
        BX = handle (optional for v1.10+)
        ES:DI -> buffer
        CX = length
Return: CF set on error
            DH = error code (see #03305)
        CF clear if successful
            CX = length
Note:   copies the local net address associated with the handle into the buffer
--------G-6006-------------------------------
INT 60 - MDEBUG - GET PASSWORD STATUS
        AH = 06h
Return: AL = status
            00h password inactive
            01h password active
--------N-6007-------------------------------
INT 60 - FTP Packet Driver - BASIC FUNC - RESET INTERFACE
        AH = 07h
        BX = handle (optional for v1.10+)
Return: CF set on error
            DH = error code (see #03305)
        CF clear if successful
--------G-6007-------------------------------
INT 60 - MDEBUG v1.70+ - GET ACTIVE PART OF MDEBUG
        AH = 07h
Return: AL = active part for the next popup session of MDEBUG:
            bit 0: the next popup session will start in the interpreter rather
                  than in the monitor
            bit 1: the next popup session will sart in the online-help
SeeAlso: AH=03h"MDEBUG",AH=04h"MDEBUG"
--------G-6008-------------------------------
INT 60 - MDEBUG - UNUSED
        AH = 08h-FFh
Return: AX = FFFCh
--------N-600A-------------------------------
INT 60 - FTP Packet Driver 1.09+ - HIGH-PERF FUNC - GET PARAMETERS
        AH = 0Ah
Return: CF set on error
            DH = error code (0Bh) (see #03305)
        CF clear if successful
            ES:DI -> parameter table (see #03310)

Format of packet driver parameter table:
Offset  Size    Description     (Table 03310)
 00h    BYTE    major revision of packet driver spec driver conforms to
 01h    BYTE    minor revision of packet driver spec
 02h    BYTE    length of this structure in bytes
 03h    BYTE    length of a MAC-layer address
 04h    WORD    maximum transfer unit, including MAC headers
 06h    WORD    buffer size for multicast addr
 08h    WORD    number of receive buffers (one less than back-to-back MTU rcvs)
 0Ah    WORD    number of transmit buffers
 0Ch    WORD    interrupt number to hook for post-EOI processing, 00h=none
--------N-600B-------------------------------
INT 60 - FTP Packet Driver 1.09 - HIGH-PERF FUNC - ASYNCHRONOUS SEND PACKET
        AH = 0Bh
        DS:SI -> buffer
        CX = length of buffer
        ES:DI -> FAR function to call when buffer becomes available (see #03311)
Return: CF set on error
            DH = error code (0Bh,0Ch) (see #03305)
        CF clear if successful
Notes:  unlike function 04h, the buffer is not available for modification as
          soon as the call returns; the buffer may be queued by the driver and
          not processed until later
        this function has been dropped from v1.10+ of the specification and
          replaced by function 0Ch
SeeAlso: AH=04h"Packet Driver",AH=0Ch"Packet Driver"

(Table 03311)
Values packet driver completion function is called with:
        AX = result
            00h copy OK
            nonzero error
        ES:DI -> buffer passed to INT 60/AH=0Bh call
--------N-600C-------------------------------
INT 60 - FTP Packet Driver 1.10+ - HIGH-PERF FUNC - ASYNCHRONOUS SEND PACKET
        AH = 0Ch
        ES:DI -> pointer to IOCB (see #03312)
Return: CF set on error
            DH = error code (see #03305)
        CF clear if successful
SeeAlso: AH=04h"Packet Driver",AH=0Bh"Packet Driver"

Format of packet driver IOCB:
Offset  Size    Description     (Table 03312)
 00h    DWORD   pointer to buffer
 04h    WORD    length of buffer
 06h    BYTE    flags
                bit 0: packet driver is finished with IOCB
                bit 1: application requests upcall when driver completes
 07h    DWORD   function address for upcall (see #03313)
 0Bh  4 BYTEs   future gather write
 0Fh    BYTE    ???
 10h  8 BYTEs   private driver workspace

(Table 03313)
Values completion function is called with:
        ES:DI -> IOCB passed to INT 60/AH=0Ch
--------N-600C-------------------------------
INT 60 - Banyan VINES, 3com - GET STATION ADDRESS
        AH = 0Ch
Return: AL = status
            00h successful
                ES:SI -> 6-byte station address
            02h semaphore service is unavailable
--------N-600D-------------------------------
INT 60 - FTP Packet Driver 1.10+ - HIGH-PERF FUNC - DROP PACKET FROM QUEUE
        AH = 0Dh
        ES:DI -> IOCB
Return: CF set on error
            DH = error code (see #03305)
        CF clear if successful
SeeAlso: AH=0Ch"Packet Driver"
--------N-6011-------------------------------
INT 60 - 3com, 10NET, Banyan VINES - LOCK AND WAIT
        AH = 11h
        AL = drive number or 0
        DX = number of seconds to wait
        ES:SI = Ethernet address or 0
        DS:BX -> 31-byte ASCIZ semaphore name
Return: AL = status (see #03314)
SeeAlso: AH=12h,AH=13h

(Table 03314)
Values for 3com semaphore status:
 00h    successful
 01h    timeout
 02h    server not responding
 03h    invalid semaphore name
 04h    semaphore list is full
 05h    invalid drive ID
 06h    invalid Ethernet address
 07h    not logged in
 08h    write to network failed
 09h    semaphore already logged for this CPU
--------N-6012-------------------------------
INT 60 - 3com, 10NET, Banyan VINES - LOCK
        AH = 12h
        AL = drive number or 00h
        ES:SI = Ethernet address or 0000h:0000h
        DS:BX -> 31-byte ASCIZ semaphore name
Return: AL = status (see also #03314)
            01h semaphore currently locked by another PC
Note:   unlike function 11h, this function returns immediately
SeeAlso: AH=11h,AH=13h
--------N-6013-------------------------------
INT 60 - 3com, 10NET, Banyan VINES - UNLOCK
        AH = 13h
        AL = drive number or 00h
        ES:SI = Ethernet address or 0000h:0000h
        DS:BX -> 31-byte ASCIZ semaphore name
Return: AL = status (see also #03314)
            01h semaphore not locked
SeeAlso: AH=11h,AH=12h
--------N-6014-------------------------------
INT 60 - FTP Packet Driver - EXTENDED FUNC - SET RECEIVE MODE
        AH = 14h
        BX = handle (optional for v1.10+)
        CX = mode (see #03315)
Return: CF set on error
           DH = error code (01h,08h) (see #03305)
        CF clear if successful
SeeAlso: AH=15h

(Table 03315)
Values for packet driver receive mode:
 01h    turn off receiver
 02h    receive only packets sent to this interface
 03h    mode 2 plus broadcast packets
 04h    mode 3 plus limited multicast packets
 05h    mode 3 plus all multicast packets
 06h    all packets
 07h    raw mode for serial line only (v1.10+)
--------N-6015-------------------------------
INT 60 - FTP Packet Driver - EXTENDED FUNC - GET RECEIVE MODE
        AH = 15h
        BX = handle (optional for v1.10+)
Return: CF set on error
            DH = error code (01h) (see #03305)
        CF clear if successful
            AX = receive mode (see #03315)
SeeAlso: AH=14h
--------N-6016-------------------------------
INT 60 - FTP Packet Driver - EXTENDED FUNC - SET MULTICAST LIST
        AH = 16h
        ES:DI -> multicast list
        CX = length of list in bytes
Return: CF set on error
            DH = error code (06h,09h,0Eh) (see #03305)
        CF clear if successful
SeeAlso: AH=17h
--------N-6017-------------------------------
INT 60 - FTP Packet Driver - EXTENDED FUNC - GET MULTICAST LIST
        AH = 17h
Return: CF set on error
            DH = error code (06h,09h) (see #03305 at AX=01FFh)
        CF clear if successful
            ES:DI -> multicast addresses (do not modify)
            CX = bytes of multicast addresses currently in use
SeeAlso: AH=16h
--------N-6018-------------------------------
INT 60 - FTP Packet Driver - EXTENDED FUNC - GET STATISTICS
        AH = 18h
        BX = handle (optional for v1.10+)
Return: CF set on error
            DH = error code (01h) (see #03305)
        CF clear if successful
            DS:SI -> statistics (see #03316)

Format of packet driver statistics:
Offset  Size    Description     (Table 03316)
 00h    DWORD   packets in
 04h    DWORD   packets out
 08h    DWORD   bytes in
 0Ch    DWORD   bytes out
 10h    DWORD   errors in
 14h    DWORD   errors out
 18h    DWORD   packets dropped
--------N-6019-------------------------------
INT 60 - FTP Packet Driver - EXTENDED FUNC - SET NETWORK ADDRESS
        AH = 19h
        ES:DI -> address
        CX = length of address
Return: CF set on error
            DH = error code (0Dh,0Eh) (see #03305)
        CF clear if successful
            CX = length
--------N-601A-------------------------------
INT 60 - FTP Packet Driver v1.10+ - EXTENDED FUNC - SEND RAW BYTES
        AH = 1Ah
        DS:SI -> buffer
        CX = length of buffer
Return: CF set on error
            DH = error code (see #03305 at AX=01FFh)
        CF clear if successful
SeeAlso: AH=1Ch
--------N-601B-------------------------------
INT 60 - FTP Packet Driver v1.10+ - EXTENDED FUNC - FLUSH RAW BYTES RECEIVED
        AH = 1Bh
Return: CF set on error
            DH = error code (see #03305)
        CF clear if successful
SeeAlso: AH=1Ch
--------N-601C-------------------------------
INT 60 - FTP Packet Driver v1.10+ - EXTENDED FUNC - FETCH RAW BYTES RECEIVED
        AH = 1Ch
        DS:SI -> buffer
        CX = length of buffer
        DX = timeout in clock ticks
Return: CF set on error
            DH = error code (see #03305 at AX=01FFh)
        CF clear if successful
            CX = number of bytes transferred to buffer
SeeAlso: AH=1Ah,AH=1Bh
----------60899B-----------------------------
INT 60 U - Agfa TTSR.EXE - API
        AX = 899Bh
        BX = function
            0001h installation check
                Return: BX = 899Bh if installed
            0002h ???
            0003h ???
        ???
Return: ???
Note:   TTSR.EXE is found in FotoLook 2.09 (16-bit), which is available from
          agfa.com; it appears to provide DOS ASPI support
!!!
--------a-60AD-------------------------------
INT 60 - AccessDOS - API
        AH = ADh
        AL = function
            E1h ???
                Return: AX = ???
            E2h get configuration
                Return: BX:AX -> configuration data
Program: AccessDOS is a public domain TSR developed at The Trace Research and
          Development Center which provides extensions for keyboard, mouse,
          and sound access by the visually, hearing, or motor-control
          impaired.
InstallCheck:   test for the signature "ACCESSv1.00" beginning three bytes
          past the start of the interrupt handler (this same signature is also
          present in v1.10)
Range:  INT 60 to INT 66, selected by scanning for 0000h:0000h vector
--------N-60E9-------------------------------
INT 60 - FTP Packet Driver - Crynwr Software - AUTOSELECT TRANSCEIVER
        AH = E9h
        ???
Return: ???
--------*-61---------------------------------
INT 61 - reserved for user interrupt
--------b-61---------------------------------
INT 61 - Atari Portfolio - EXTENDED BIOS
Desc:   provides subfunctions such as turning off the machine, accessing
          internal variables, and mapping memory cards
SeeAlso: INT 60"Atari",AH=00h"Portfolio",AH=08h"Portfolio",AH=0Dh"Portfolio"
SeeAlso: AH=11h"Portfolio",AH=15h"Portfolio",AH=19h"Portfolio"
SeeAlso: AH=1Bh"Portfolio",AH=24h"Portfolio",AH=2Ch"Portfolio"
SeeAlso: AH=30h"Portfolio"
--------b-61---------------------------------
INT 61 - TI Professional PC - FACTORY ROM DATA AREA POINTER (NOT A VECTOR!)
Desc:   the low word of this vector contains the segment of the RAM data area
          to be used by the expansion ROM at F400h:0000h, and the high word
          contains the length of the data area; this segment and size are
          both set to 0000h if no ROM is installed at F400h:0000h
SeeAlso: INT 60"TI Professional PC",INT 62"TI Professional"
SeeAlso: INT 66"TI Professional PC"
--------b-61---------------------------------
INT 61 - HP 95LX System Manager - LOAD DS
SeeAlso: INT 0F"HP 95LX",INT 60/DI=0102h"HP 95LX"
--------r-61---------------------------------
INT 61 - JPI TopSPEED Modula-2 v1 - PROCEDURE EXIT TRAP
SeeAlso: INT 60"JPI"
--------d-61---------------------------------
INT 61 - Adaptec and OMTI controllers - DRIVE 0 DATA
Desc:   this vector stores the second four bytes of the parameter table for
          hard disk 0
SeeAlso: INT 60"Adaptec",INT 62"Adaptec",INT 63"Adaptec"
--------I-61---------------------------------
INT 61 - Sangoma CCIP (CCPOP 3270 resident module) INTERFACE
        BX:DX -> control block
SeeAlso: INT 67"Sangoma"
--------v-61---------------------------------
INT 61 - VIRUS - "SEMTEX"/"Screen Trasher" - INT 21h SUBSTITUTE
Note:   the virus copies the original INT 21h vector into INT 61h
SeeAlso: INT 21/AH=00h,INT 21/AH=25h,INT 60"VIRUS",INT 6B"VIRUS"
--------U-61---------------------------------
INT 61 - PC-Magazin - PAGE, SWAPx
        details not yet available
Program: PAGE and SWAPx are utilities from PC-Magazin, the German edition of
          PC Magazine, issue 47/85, page 31
SeeAlso: INT 66"INCA"
--------N-61---------------------------------
INT 61 - TCPOpen kernel - API
        ES:BX -> request packet (see #03317)
Program: TCPOpen is a TCP/IP protocol stack by Lanera
Range:  INT 60 to INT 7F, selected by configuration file
Note:   there does not appear to be an installation check, though function
          FFFFh can be used to verify that the software is indeed functioning

Format of TCPOpen request packet:
Offset  Size    Description     (Table 03317)
 00h  8 BYTEs   ???
 08h    WORD    function number (0000h-001Ah or FFF9h-FFFFh)
 0Ah    WORD    ???
 0Ch  2 BYTEs   ???
 0Eh    WORD    (ret) return code
 10h  2 BYTEs   ???
 12h    WORD    ???
 14h    WORD    (ret) 0001h if requested function complete
 16h    WORD    (ret) ???
 18h  6 BYTEs   ???
 1Eh    DWORD   -> ???
 22h    WORD    ??? or 0000h
 24h    WORD    (ret) ???
SeeAlso: #03318

(Table 03318)
Call TCPOpen Function FFFFh: installation verification
Return: offset 10h = BEEFh
        offset 14h = 0001h
        offset 24h = ???
Index:  installation check;TCPOpen kernel
--------N-61---------------------------------
INT 61 - XFS v1.76 - XFSKRNL.EXE - API
        AX = function
            8000h installation check???
                Return: AX = 0000h
            8001h ???
                ES:DI -> DWORD ???
                Return: AX = status???
            8002h ???
                BX = ???
                CX = ???
                ES:DI -> ???
                Return: AX = status???
            8003h ???
                BX = ???
                CX = ???
                ES:DI -> ???
                Return: AX = status???
            8004h ???
                BX = ???
                Return: AX = status???
            8005h wait until ???
                Return: DX:AX = ???
            8006h get ???
                Return: DX:AX -> ??? record
            8007h set IP address??? (or htonl/ntohl)
                DX:BX = IP address???
                Return: DX:AX = byte-swapped IP address
            8008h set IP address??? (or htonl/ntohl)
                DX:AX = IP address???
                Return: DX:AX = byte-swapped IP address
            8009h ???
                ES:DI -> ???
                Return: DX:AX = ???
            800Ah ???
            800Bh ???
                Return: DX:AX = ???
            800Ch ???
            800Dh ???
            800Eh ???
            800Fh ???
            8010h get ??? record
                Return: DX:AX -> ??? record
            8011h ???
            8012h ???
                BX = ???
                Return: DX:AX = ???
            8013h get ??? record
                Return: DX:AX -> ??? record
            8014h ???
                ES:DI -> ???
                Return: nothing
            8015h get ??? record
                Return: DX:AX -> 8-byte ??? record
            8016h get ??? record
                Return: DX:AX -> 6-byte ??? record
            8017h ???
                ES:DI -> ???
                Return: DX:AX = ???
            8018h get ??? record
                Return: DX:AX -> ??? record
            8019h get ??? record
                Return: DX:AX -> 14-byte ??? record
            801Ah get ??? record
                Return: DX:AX -> ??? record (max 98 bytes)
            801Bh get ??? record
                Return: DX:AX -> ??? record
            801Ch ???
                Return: nothing
            801Dh get ???
                Return: AL = ???
            801Eh ???
                Return: AX = ???
            801Fh uninstall
                Return: AX = status
                            0000h successful
                            other interrupt which could not be released
        AX = other
                Return: AX:BX = ??? (0000h:0000h by default)
Program: XFS is a shareware Network File System client by Robert Juhasz
Range:  INT 60 to INT 65, selected by scanning for two consecutive free
          vectors and hooking the first
SeeAlso: INT 62"XFS"
--------N-61---------------------------------
INT 61 - FTP Software PC/TCP - TCP/IP TSR System Call interface
        AH = system call number (also see entries below)
            01h "pkt_alloc" (v2.05; this is "net_config" in v2.1+)
            02h "pkt_free" (v2.05; this is "get_kernel_info" in v2.1+)
Return: CF clear if successful
        CF set on error
            AL = basic error (see #03319)
            AH = suberror number (see #03320,#03321)
InstallCheck:   test for the signature "TCPTSR" three bytes beyond the start
          of the interrupt handler
Range:  INT 20h to INT E0h, selected by configuration
BUG:    the SLIP kernel for v2.05 bounds-checks the wrong register, so values
          greater than 54h in AH may crash the system.  Other kernels may have
          this bug as well.
SeeAlso: INT 61/AH=00h"PC/TCP",INT 61/AH=2Ah,INT 61/AH=54h
Index:  installation check;PC/TCP

(Table 03319)
Values for PC/TCP error code:
 00h "NET_NOERR" successful
 01h "NET_ERR_INUSE" protocol or socket already in use
 02h "NET_DOS_ERR" MS-DOS error (returned as suberror code in AH)
 03h "NET_ERR_NOMEM" out of memory
 04h "NET_ERR_NOTNETCONN" not a network descriptor
 05h "NET_ERR_ILLEGALOP" invalid operation on given kind of network descriptor
 06h "NET_ERR_BADPKT" illegal or corrupted packet
 07h "NET_ERR_NOHOST" no host bound to specified connection
 08h "NET_ERR_CANTOPEN" unable to open file
 09h "NET_ERR_NET_UNREACHABLE" network is unreachable
 0Ah "NET_ERR_HOST_UNREACHABLE" host is unreachable (see #03320)
 0Bh "NET_ERR_PROT_UNREACHABLE" protocol is unreachable
 0Ch "NET_ERR_PORT_UNREACHABLE" port is unreachable
 0Dh "NET_ERR_TIMEOUT" operation timed out
 0Eh "NET_ERR_HOSTUNKNOWN" unable to resolve host name
 0Fh "NET_ERR_NOSERVERS" no name servers configured
 10h "NET_ERR_SERVER_ERR" bad reply from name server
        Subcodes: 0= no error, 1 = Host unreachable
 11h "NET_ERR_BADFORMAT" bad format for IP address or field in IP address
                        structure is zero
 12h "NET_ERR_BADARG" invalid argument
 13h "NET_ERR_EOF" foreign host closed its end of connection
 14h "NET_ERR_RESET" connection has been reset
 15h "NET_ERR_WOULDBLOCK" recv() call was done on a non-blocking connection
                        with no data available
 16h "NET_ERR_UNBOUND" insufficient resources to do operation
 17h "NET_ERR_NODESC" could not allocate network descriptor
 18h "NET_ERR_BADSYSCALL" invalid/unsupported kernel call
 19h "NET_ERR_CANTBROADCAST" unable to broadcast
 1Ah "NET_ERR_NOTESTAB" operation illegal because connection not established
 1Bh kernel busy, try again later
 1Ch "NET_ERR_ICMPMESG" an ICMP message was received (not on streams)
        (see #03321)
---v2.1+---
 1Dh "NET_ERR_TERMINATING" internal kernel fatal error
 1Eh "NET_ERR_TAG_LOCKED" not allowed to set this tag (net_config)
 1Fh "NET_ERR_BAD_INTERFACE" non existent interface specified
 20h "NET_ERR_BADCONFIG" kernel cannot run - bad configuration
 21h "NET_ERR_EMM" expanded memory error
 22h "NET_ERR_CANT_SHUTDOWN" cant unload kernel (multitasker running)
 23h "NET_ERR_PARKED_IN" unable to unhook DOS interrupt
 24h "NET_ERR_NOQIOS" ran out of resources; try again later
 25h "NET_ERR_WOULD_TRUNCATE" datagram too large and "don't truncate" was set

(Table 03320)
Values for subcodes of PC/TCP error 0Ah "NET_ERR_HOST_UNREACHABLE":
 00h    no error
 01h    host unreachable
 02h    ARP failed
 03h    hardware failure
 04h    link failure
 05h    no route
 06h    gateway down
SeeAlso: #03319,#03321

(Table 03321)
Values for subcodes of PC/TCP error 1Ch "NET_ERR_ICMPMESG":
 07h    unrecognised
 08h    can't fragment
 09h    srcr_fail
 0Ah    source quench
 0Bh    time exceeded
 0Ch    parameter problem
 0Dh    admin_prohib. see also code 0Ah
SeeAlso: #03319,#03320
--------N-6100-------------------------------
INT 61 U - PC/TCP kernel v2.05+ - GET DEBUG INFORMATION
        AH = 00h
        DS:SI -> 216-byte buffer for network debugging information (see #03322)
Return: CF clear
        AX = 0000h
        buffer filled
Notes:  this call is not documented by FTP, Inc. for any version
        most of the information returned by this call is available via the
          documented get_kernel_info or net_info commands.
        this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
SeeAlso: INT 61"FTP Software",INT 61/AH=2Ah"PC/TCP"

Format of network debugging information:
Offset  Size    Description     (Table 03322)
 00h    DWORD   number of interrupts
 04h    DWORD   receive buffer low-water mark
 08h    DWORD   transmit buffer low-water mark
 0Ch    DWORD   number of packets received
 10h    DWORD   number of packets transmitted
 14h    DWORD   total receive errors
 18h    DWORD   total transmit errors
 1Ch  4 BYTEs   ???
 20h    DWORD   receive resets
 24h    DWORD   transmit resets
 28h    DWORD   number of "runts" received
 2Ch    DWORD   number of alignment errors on received packets
 30h    DWORD   number of CRC errors on received packets
 34h    DWORD   number of parity errors on received packets
 38h    DWORD   number of receive overflow errors
 3Ch    DWORD   number of oversized packets received
 40h    DWORD   number of packets lost due to lack of buffers
 44h    DWORD   receive timeouts
 48h 32 BYTEs   ???
 68h    DWORD   number of transmit collisions
 6Ch    DWORD   number of transmit timeouts
 70h    DWORD   number of transmit underflows
 74h    DWORD   number of lost "crs" on transmit
 78h    DWORD   number of times heartbeat failed on transmit
 7Ch 24 BYTEs   ???
 94h    WORD    free packet buffers
 96h    WORD    total packet buffers
 98h    WORD    minimum number of packet buffers free since kernel started
 9Ah 24 BYTEs   ???
 B2h    DWORD   pointer to TCP connection list???
 B6h    DWORD   pointer to IP routing table???
 BAh 30 BYTEs   ???
--------N-6100-------------------------------
INT 61 - Banyan VINES - CALL A SERVICE
        AH = 00h
        AL = service ID (1..16)
        other registers vary by service
Return: AX = status (see #03325)
Desc:   Calls an adapter driver or redirector service. The service handler
          pointers are stored at offset 0010h in the code segment of the
          BANV interrupt handler (see #03323).
Note:   Banyan can use any interrupt from 60h through 66h.  The Banyan
          interrupt handler is identified by the string "BANV" in the four
          bytes immediately preceding the interrupt handler
SeeAlso: AH=01h,AH=03h

Format of the BANV code segment (revision 5.53):
Offset  Size    Description     (Table 03323)
 00h 16 BYTEs   reserved
 10h 16 DWORDs  far pointers to the service handlers (0 = not installed)
 50h    DWORD   far pointer to last called service
 54h    WORD    VINES revision
 56h    DWORD   VINES revision long
 5Ah    WORD    VINES revision (lower bound)
 5Ch    DWORD   VINES revision (lower bound) long
 60h    WORD    VINES revision (upper bound)
 62h    DWORD   VINES revision (upper bound) long
 66h    WORD    end of PCCONFIG area
 68h    WORD    start of PCCONFIG area
 6Ah  4 BYTEs   BANV interrupt identifier ("BANV")
 6Eh  N BYTEs   BANV interrupt service
SeeAlso: #03324
--------b-6100-------------------------------
INT 61 - Atari Portfolio - SERVICE INITIALIZATION
        AH = 00h
Return: nothing
Note:   applications using any Portfolio INT 61 calls should call this function
          exactly once at startup
SeeAlso: AH=07h"Portfolio",AH=09h"Portfolio",AH=0Dh"Portfolio"
SeeAlso: AH=11h"Portfolio",AH=15h"Portfolio",AH=19h"Portfolio"
SeeAlso: AH=1Bh"Portfolio",AH=24h"Portfolio",AH=2Ch"Portfolio"
SeeAlso: AH=30h"Portfolio"
--------V-610000-----------------------------
INT 61 - OPTIMA 1024 VGA-Sync,ET-3000 chipset - ZOOM DISPLAY
        AX = 0000h
        BX = zoom factor (0-7)
Desc:   zooms the display based on the given zoom factor
Notes:  INT 61h is the default interrupt; the actual interrupt number can be
          obtained by calling INT 16/AH=FFh
        not all vendors include the Tseng TSR which supports these functions
SeeAlso: AX=0001h"OPTIMA",AX=0002h"OPTIMA",AX=0005h"OPTIMA"
SeeAlso: INT 16/AH=FFh"OPTIMA"
--------N-610001DS0001-----------------------
INT 61 - Banyan VINES - INTERNAL VINES SOCKET API (NEAR DATA)
        AX = 0001h
        DS = 0001h (to distinguish from alternate AX=0001h socket interface)
        CX:BX -> internal communications control block (see #03324)
        DX = caller's data segment
Return: AX = status
            0000h successful
            0099h invalid operation
            00A5h resource not available
Desc:   StreetTalk access with session handles
Range:  INT 60 to INT 66
Notes:  This service is handled by the adapter driver
        The request dispatch table contains dummy entries for subfunctions
          06h, 0Dh, 0Eh, 0Fh, 10h, and 11h, which always return error 0099h
          (invalid operation) in the request block's result buffer
        in recent VINES releases, this interface is superseded by the AX=000Fh
          interface, which allows FAR parameter block pointers (refer to that
          function's entries for more details on individual subfunctions)
        some adapter drivers (e.g. the NDIS2 token ring driver NDTOKBAN for
          VINES 5.53) ignore the value in CX and use the value from DX instead
SeeAlso: AX=000Fh

Format of internal communications control block:
Offset  Size    Description     (Table 03324)
 00h    WORD    subfunction number
 02h    WORD    magic number (FEFEh)
 04h    WORD    (ret) result, should be set to 0 before calling
 06h    WORD    reserved (will be set to client DS)
 08h    WORD    caller's code segment if function 000Bh, 0 else
 0Ah    WORD    pointer to parameter block
 0Ch    WORD    reserved (segment of parameter block; will be set to client DS)
 0Eh    WORD    StreetTalk handle
SeeAlso: #03323,#03444 at INT 61/AX=000Fh
--------N-610001SF0001-----------------------
INT 61 - Banyan VINES - "Sosock" - OPEN COMMUNICATIONS SOCKET
        AX = 0001h subfn 0001h
        DS:DX -> communications control block (function 0001h) (see #03326)
Return: AX = status (0000h-0002h,0098h,009Eh-00A2h) (see #03325)
Range:  INT 60h to INT 66h
Note:   The Banyan interrupt handler is identified by the string "BANV" in
          the four bytes immediately preceding the interrupt handler
SeeAlso: AX=0001h/SF=0002h,AX=0001h/SF=0008h,INT 15/AX=DE2Eh

(Table 03325)
Values for VINES status:
 0000h  successful
 0001h  service not installed
 0002h  invalid service ID
 0003h  invalid function
 0004h-000Ah reserved for BANV interface errors
 0097h  invalid socket identifier
 0098h  resource already in use
 009Bh  destination node unreachable
 009Ch  message overflow
 009Dh  destination socket nonexistent
 009Eh  address family does not exist
 009Fh  socket type does not exist
 00A0h  protocol does not exist
 00A1h  no more sockets available
 00A2h  no more buffer space available
 00A3h  timeout
 00A5h  resource not available
 00A6h  internal communication failure
 00B1h  resource disconnect

Format of VINES control block to open socket:
Offset  Size    Description     (Table 03326)
 00h    WORD    0001h
 02h    WORD    pointer to argument block
 04h    WORD    error return code
 06h  4 BYTEs   reserved
SeeAlso: #03327

Format of VINES argument block for opening socket:
Offset  Size    Description     (Table 03327)
 00h    WORD    pointer to 2-byte buffer for socket identifier
 02h    WORD    address family
                0003h Banyan
 04h    WORD    socket type
                in address family 0003h
                    0001h IPC socket
                    0002h SPP socket
 06h    WORD    protocol number
                FFFFh default
 08h    WORD    pointer to 16-byte buffer for socket address (see #03328)
 0Ah    WORD    local port number
                0000h if service should assign transient port number
                0001h to 01FFh well-known port number (assigned by Banyan)
SeeAlso: #03326

Format of Banyan VINES IPC port:
Offset  Size    Description     (Table 03328)
 00h    WORD    address family (always 0003h for Banyan ports)
 04h  4 BYTEs   network number (server's serial number)
 06h    WORD    subnet number  (0001h = server, 8000h-FFFEh = PC)
 08h    WORD    port ID (0001h-01FFh for "well-known" ports)
 0Ah    BYTE    hop count
 0Bh  5 BYTEs   filler
SeeAlso: #03333
--------N-610001SF0002-----------------------
INT 61 - Banyan VINES - "Sosend" - INITIATE OUTPUT EVENT
        AX = 0001h subfn 0002h
        DS:DX -> communications control block (function 0002h) (see #03329)
Return: AX = status (0000h-0002h,0097h,009Bh-009Dh,00A2h,00A3h,00B1h)
            (see #03325)
Range:  INT 60h to INT 66h
Note:   The Banyan interrupt handler is identified by the string "BANV" in
          the four bytes immediately preceding the interrupt handler
SeeAlso: AX=0001h/SF=0001h,AX=0001h/SF=0005h

Format of VINES control block for subfunction 0002h:
Offset  Size    Description     (Table 03329)
 00h    WORD    0002h
 02h    WORD    pointer to argument block (see #03330)
 04h    WORD    error return code (0000h,0097h,00A2h,00A3h,00A5h,00A6h,00B1h)
                (see #03325)
 06h  4 BYTEs   reserved
SeeAlso: #03334

Format of VINES argument block for subfunction 0002h:
Offset  Size    Description     (Table 03330)
 00h    WORD    routine metric
 02h    WORD    error return code
 04h    WORD    socket identifier
 06h    WORD    pointer to send buffer (see #03332)
 08h    WORD    length of send buffer
 0Ah    WORD    message request flags (see #03331)
 0Ch 16 BYTEs   socket address (see #03333)
 1Ch    WORD    timeout value in multiples of 200ms
 1Eh    WORD    connection identifier
 20h    WORD    type of request
                0001h send message
                0002h establish a virtual connection
                0003h terminate a virtual connection
SeeAlso: #03329,#03335

Bitfields for message request flags:
Bit(s)  Description     (Table 03331)
 0      async request
 1      reliable message
 2      flush receive buffer on overflow
 3      end of user message received
 4      vectored request (if set, send buffer contains buffer descriptors)
 5      connection-specific receive
 6      change to connection-specific receive mode
SeeAlso: #03330,#03335

Format of buffer descriptor:
Offset  Size    Description     (Table 03332)
 00h    WORD    data segment
 02h    WORD    buffer pointer
 04h    WORD    buffer length
 06h    WORD    character count
SeeAlso: #03330

Format of VINES socket address for unreliable datagrams:
Offset  Size    Description     (Table 03333)
 00h    WORD    0003h     address family
 02h    DWORD   FFFFFFFFh network number
 06h    WORD    FFFFh     subnet number
 08h    WORD              local port number
 0Ah    BYTE    00h-0Fh   hop count
 0Bh  5 BYTEs   0000h     filler
SeeAlso: #03328
--------N-610001SF0003-----------------------
INT 61 - Banyan VINES - "Sorec" - RECEIVE INPUT EVENT NOTIFICATION
        AX = 0001h subfn 0003h
        DS:DX -> communications control block (function 0003h) (see #03334)
Return: AX = status (00-0Ah,97h,A2h,A3h) (see #03325)
Range:  INT 60h to INT 66h
Note:   The Banyan interrupt handler is identified by the string "BANV" in
          the four bytes immediately preceding the interrupt handler
SeeAlso: AX=0001h/SF=0002h

Format of VINES control block for subfunction 0003h:
Offset  Size    Description     (Table 03334)
 00h    WORD    0003h
 02h    WORD    pointer to argument block (see #03335)
 04h    WORD    error return code (0000h,0097h,00A2h,00A3h,00A5h,00A6h,00B1h)
                (see #03325)
 06h  4 BYTEs   reserved
SeeAlso: #03329,#03335,#03337

Format of VINES argument block for subfunction 0003h:
Offset  Size    Description     (Table 03335)
 00h    WORD    character count
 02h    WORD    error return code
 04h    WORD    socket identifier
 06h    WORD    pointer to receive buffer (see #03336)
 08h    WORD    length of receive buffer
 0Ah    WORD    message request flags (see #03331)
 0Ch 16 BYTEs   socket address (see #03328)
 1Ch    WORD    timeout value in multiples of 200ms
 1Eh    WORD    connection identifier
 20h    WORD    type of response
                0001h message received
                0002h virtual connection established
                0003h virtual connection terminated
SeeAlso: #03334,#03338

Format of buffer descriptor:
Offset  Size    Description     (Table 03336)
 00h    WORD    data segment
 02h    WORD    buffer pointer
 04h    WORD    buffer length
 06h    WORD    character count
SeeAlso: #03335
--------N-610001SF0004-----------------------
INT 61 - Banyan VINES - "Soclose" - CLOSE A SOCKET
        AX = 0001h subfn 0004h
        DS:DX -> communications control block (function 0004h) (see #03337)
Return: AX = status (0000h-000Ah,0097h) (see #03325)
Range:  INT 60h to INT 66h
Note:   The Banyan interrupt handler is identified by the string "BANV" in
          the four bytes immediately preceding the interrupt handler
SeeAlso: AX=0001h/SF=0001h,INT 15/AX=DE2Eh

Format of VINES control block to close socket:
Offset  Size    Description     (Table 03337)
 00h    WORD    0004h
 02h    WORD    pointer to argument block (see #03338)
 04h    WORD    error return code (see #03325)
 06h  4 BYTEs   reserved
SeeAlso: #03334,#03340

Format of VINES argument block for closing socket:
Offset  Size    Description     (Table 03338)
 00h    WORD    socket identifier
SeeAlso: #03335,#03337,#03341
--------N-610001SF0005-----------------------
INT 61 - Banyan VINES - "Sowait" - WAIT FOR ASYNCHRONOUS EVENT COMPLETION
        AX = 0001h subfn 0005h
        DS:DX -> communications control block (see #03340)
Return: AX = status (0000h-000Ah,00A2h,00A3h) (see #03339)
Desc:   returns results for all asynchronous operations invoked from the
          data segment used for this call
Range:  INT 60h to INT 66h
Notes:  The Banyan interrupt handler is identified by the string "BANV" in
          the four bytes immediately preceding the interrupt handler
SeeAlso: AX=0001h/SF=0002h,AX=0001h/SF=0009h

(Table 03339)
Values for VINES function status:
 0000h  successful
 0001h  service not installed
 0002h  invalid service ID
 0003h-000Ah reserved for BANV interface errors
 00A2h  no more buffer space available
 00A3h  timeout event

Format of VINES control block for subfunction 0005h:
Offset  Size    Description     (Table 03340)
 00h    WORD    0005h
 02h    WORD    pointer to argument block (see #03341)
 04h    WORD    error return code
 06h  4 BYTEs   reserved
SeeAlso: #03337,#03342

Format of VINES argument block for subfunction 0005h:
Offset  Size    Description     (Table 03341)
 00h    WORD    pointer to WORD event pointer
 02h    WORD    timeout in multiples of 200ms, FFFFh = infinite
SeeAlso: #03338,#03340
--------N-610001SF0008-----------------------
INT 61 - Banyan VINES - "Sosession" - REGISTER APPLICATION WITH COMM SERVICE
        AX = 0001h subfn 0008h
        DS:DX -> communications control block (function 0008h) (see #03342)
Return: AX = status
            0000h  successful
            00A2h  no more buffer space available
Range:  INT 60h to INT 66h
Note:   The Banyan interrupt handler is identified by the string "BANV" in
          the four bytes immediately preceding the interrupt handler
SeeAlso: AX=0001h/SF=0001h,AX=0001h/SF=0009h

Format of VINES control block for subfunction 0006h:
Offset  Size    Description     (Table 03342)
 00h    WORD    0008h
 02h    WORD    process type
                0001h transient process
                0002h resident process
 04h    WORD    error return code
 06h  4 BYTEs   reserved
SeeAlso: #03340,#03343
--------N-610001SF000B-----------------------
INT 61 - Banyan VINES - "Soint" - SET USER COMPLETION FUNCTION
        AX = 0001h subfn 000Bh
        DS:DX -> communications control block (function 000Bh) (see #03343)
Return: AX = status (00h-0Ah,A2h) (see #03339)
Range:  INT 60h to INT 66h
Note:   The Banyan interrupt handler is identified by the string "BANV" in
          the four bytes immediately preceding the interrupt handler
SeeAlso: AX=0001h/SF=0005h,AX=0001h/SF=0008h

Format of VINES control block for subfunction 000Bh:
Offset  Size    Description     (Table 03343)
 00h    WORD    000Bh
 02h    WORD    pointer to argument block (see #03344)
 04h    WORD    error return code (see #03325)
 06h  2 BYTEs   reserved
 08h    WORD    user CS register
SeeAlso: #03342

Format of VINES argument block for subfunction 000Bh:
Offset  Size    Description     (Table 03344)
 00h    WORD    pointer to user interrupt function (see #03345)
 02h    WORD    pointer to user stack
 04h    WORD    initial timeout value in multiples of 200ms, FFFFh = infinite
SeeAlso: #03344

(Table 03345)
Values FAR user function is invoked with:
        SS = DS = ES = segment of control block
        STACK:  DWORD   return address
                WORD    argument pointer (sosend or sorec argument block)
                WORD    error return code
                        0000h argument pointer is valid
                        00A3h timeout
--------V-610001-----------------------------
INT 61 - OPTIMA 1024 VGA-Sync,ET-3000 chipset - CENTER ZOOM WINDOW
        AX = 0001h
        BX = X coordinate to center
        CX = Y coordinate to center
Desc:   Positions the zoom window such that the specified window-relative
          coordinates appear as close as possible to the center of the
          display.  Useful for scrolling and panning.
Range:  unknown
Notes:  INT 61h is the default interrupt; the actual interrupt number can be
          obtained by calling INT 16/AH=FFh
        not all vendors include the Tseng TSR which supports these functions
SeeAlso: AX=0000h"OPTIMA",AX=0002h"OPTIMA",AX=0005h"OPTIMA"
SeeAlso: INT 16/AH=FFh"OPTIMA"
--------I-610002-----------------------------
INT 61 - Banyan VINES - 3270 INTERFACE
        AX = 0002h
        BH = function number (see #03346)
        DS:CX -> argument block (except BH=00h,1Ah) (see #03348)
Return: AX = status (see #03347)
Notes:  Either 3270/SNA or 3270/BSC interface may use AX=0002h, depending on
          which is loaded first.  The other interface will use AX=000Ah
        Status codes greater than 63h indicate an inconsistency in the 3270/SNA
          or 3270/BSC resident driver, which must be reloaded by the user

(Table 03346)
Values for VINES 3270 interface function number:
 00h "pi2reset"  reset 3270/SNA or 3270/BSC driver
 02h "pi2bsc"    (3270/BSC only)
 03h "pi2get"    get information stored in 3270 resident driver
 04h "pi2put"    store information in 3270 resident driver
 05h "pi2gcur"   get current screen position
 07h "pi2sdat"   send data keystroke
 08h "pi2scom"   send command keystroke
 0Ah "pi2field"  get field info for arbitrary screen positions
 0Fh "pi2stat"   get logical unit/device status
 12h "pi2nlus"   determine logical unit/device assignment
 13h "pi2gate"   specifies comm port address to gateway service
 14h "pi2attach" attach a logical unit/device
 15h "pi2sdev"   save logical unit/device info in resident driver
                (not supported in >3.0)
 16h "pi2gdev"   get device information (not supported in >3.0)
 17h "pi2luinfo" get info about specific logical unit/device
 18h "pi2gerr"   get finer error detail
 19h "pi2dhold"  (3270/SNA only)  holds a 3270 device
 1Ah "pi2shut"   release memory-resident module
 1Ch "pi2sprof"  save profile info in res driver (not supp in >3.0)
 1Dh "pi2gprof"  get prevsly stored profile info (not supp in >3.0)

(Table 03347)
Values for VINES 3270 status:
 0000h  successful
 000Bh  invalid parameter or data does not fit data area
 000Ch  another code path currently active in resident driver
 000Dh  operation currently not allowed
 0032h  encountered connection disconnect error
 0033h  encountered "sosend" completion error
 0034h  encountered "sosend" communication error
 0035h  attach request refused. extended error info via "pi2gerr":
        01h resource unavailable
        02h invalid type
        03h version mismatch
        04h invalid logical unit number
        05h error during ARL processing
        06h no access for user
 0071h  encountered "sosock" error
 0072h  encountered unrecognizable error
 0073h  encountered "sowait" error (extended info via "pi2gerr")
 0074h  encountered invalid type-of-request on "sowait"
 0075h  encountered "sorec" error (extended info via "pi2gerr")
 0076h  encountered "sorec" completion error (ext info via "pi2gerr")
 0077h  encountered connection request
 0078h  encountered unrecognizable data
 0079h  encountered unknown connection ID (ext info via "pi2gerr")
SeeAlso: #03325

Format of argument block for BH=03h,04h:
Offset  Size    Description     (Table 03348)
 00h    WORD    size of data area (max 256)
 02h  N BYTEs   data area
SeeAlso: #03349,#03350,#03351

Format of argument block for BH=05h:
Offset  Size    Description     (Table 03349)
 00h    WORD    logical unit/device number
 02h    WORD    pointer to WORD buffer for cursor index
 04h    WORD    pointer to BYTE buffer for current field attribute
SeeAlso: #03348,#03350,#03351

Format of argument block for BH=07h:
Offset  Size    Description     (Table 03350)
 00h    WORD    logical unit/device number
 02h    WORD    ASCII data byte
 04h    WORD    pointer to WORD count of characters which will need updating
SeeAlso: #03348,#03349,#03351

Format of argument block for BH=08h:
Offset  Size    Description     (Table 03351)
 00h    WORD    logical unit/device number
 02h    WORD    3270 keystroke (see #03352)
SeeAlso: #03348,#03349,#03350,#03353

(Table 03352)
Values for 3270 keystroke:
 0000h  Enter
 0001h  Clear
 0002h  PA1
 0003h  PA2
 0004h  PA3
 0005h  PF1
 ...
 001Ch  PF24
 001Dh  CSELECT (cursor select)
 001Eh  Insert
 001Fh  Delete
 0020h  EOField
 0021h  EINPUT (erase input)
 0022h  Reset
 0023h  Attention
 0024h  SysReq
 0025h  Duplicate
 0026h  Fieldmark
 0027h  Home
 0028h  NextLine
 0029h  Tab
 002Ah  BackTab
 002Bh  cursor up
 002Ch  cursor down
 002Dh  cursor right
 002Eh  cursor left
 002Fh  double cursor right
 0030h  double cursor left
 0031h  PRINT
 0032h  CANCEL
 0033h  Backspace

Format of argument block for BH=0Ah:
Offset  Size    Description     (Table 03353)
 00h    WORD    logical unit/device number
 02h    WORD    screen index
 04h    WORD    pointer to WORD buffer for field length
 06h    WORD    pointer to WORD buffer for offset in screen of field start
SeeAlso: #03351,#03354

Format of argument block for BH=0Fh:
Offset  Size    Description     (Table 03354)
 00h    WORD    logical unit/device number
 02h    WORD    clear mask (clear these bits of status after returning status)
 04h    WORD    pointer to WORD buffer for device status (see #03355)
SeeAlso: #03353,#03356

Bitfields for Banyan 3270 device status:
Bit(s)  Description     (Table 03355)
 10     status modified
 9      buffer modified
 8      set cursor
 5      sound alarm
 1-0    size of print line for printer logical units
        00  unformatted line
        01  40-character line
        10  64-character line
        11  80-character line

Format of argument block for BH=12h:
Offset  Size    Description     (Table 03356)
 00h    WORD    pointer to WORD buffer for number of logical units or devices
 02h    WORD    pointer to WORD buffer for version number
 04h    WORD    pointer to 64-byte buffer for logical unit/device list
SeeAlso: #03354,#03357

Format of argument block for BH=13h:
Offset  Size    Description     (Table 03357)
 00h 16 BYTEs   communications port address (see #03328)
SeeAlso: #03356,#03358

Format of argument block for BH=14h:
Offset  Size    Description     (Table 03358)
 00h    WORD    logical unit/device number
                0000h attach any free device of the specified type
 02h    WORD    logical unit/device type
                (3270/SNA) 01h, 02h, or 03h
                (3270/BSC) 02h display
                (3270/BSC) 03h printer
 04h    WORD    pointer to WORD buffer for attached logical unit/device number
SeeAlso: #03357,#03359

Format of argument block for BH=16h:
Offset  Size    Description     (Table 03359)
 00h    WORD    pointer to 18-byte buffer for device block (see #03364)
                first WORD must be set to desired logical unit/device number
SeeAlso: #03358,#03360

Format of argument block for BH=17h:
Offset  Size    Description     (Table 03360)
 00h    WORD    logical unit/device number
 02h    WORD    pointer to information block in caller's DS (see #03365)
SeeAlso: #03359,#03361

Format of argument block for BH=18h:
Offset  Size    Description     (Table 03361)
 00h    WORD    pointer to WORD buffer for major error code
 02h    WORD    pointer to WORD buffer for minor error code
SeeAlso: #03360,#03362

Format of argument block for BH=19h:
Offset  Size    Description     (Table 03362)
 00h    WORD    logical unit/device number
SeeAlso: #03361,#03363

Format of argument block for BH=1Ch,1Dh:
Offset  Size    Description     (Table 03363)
 00h    WORD    pointer to profile block in caller's DS (see #03368)
SeeAlso: #03348,#03362

Format of device block, argument block for BH=15h:
Offset  Size    Description     (Table 03364)
 00h    WORD    logical unit/device number
 02h    WORD    logical unit/device type
 04h    WORD    display model number
 06h    WORD    numeric checking
 08h    WORD    status line
 0Ah    BYTE    unprotected normal field attribute
 0Bh    BYTE    unprotected intensified field attribute
 0Ch    BYTE    protected normal field attribute
 0Dh    BYTE    protected intensified field attribute
 0Eh    WORD    reserved
 10h    WORD    printer port number

Format of information block:
Offset  Size    Description     (Table 03365)
 00h    WORD    device model number
 02h    DWORD   screen buffer pointer
 06h    DWORD   status line pointer (see #03366)
 0Ah    DWORD   reserved

Format of Banyan VINES 3270 status line:
Offset  Size    Description     (Table 03366)
 00h    BYTE    comm line status
                00h inactive
                01h active
 01h    BYTE    activation level
                01h physical unit activated
                02h logical unit also activated
                03h session is bound
 02h    BYTE    data traffic state
                00h inactive
                01h active
 03h    BYTE    screen ownership
                00h SLU->PLU session owns screen
                01h SLU->SSCP session owns screen
 04h    BYTE    keyboard status (see #03367)
 05h    BYTE    insert mode
                01h if in insert mode
 06h    BYTE    numeric
                01h if current screen buffer is numeric only
 07h    BYTE    printer status
                00h printer not assigned
                01h printer is inactive
                02h printer error
                03h currently printing
                04h printer is busy
                05h printer is very busy
 08h    BYTE    printer assignment
 09h    BYTE    maximum size of network name
 0Ah  N BYTEs   ASCIZ network name
        BYTE    maximum size of message window
      M BYTEs   null-terminated message window
        BYTE    code set
                00h EBCDIC
                01h ASCII
      M BYTEs   extended attributes
                01h extended attributes are in effect (stored at screen+1920)
                    each extended attribute specifies
                    bits 0,1: 00=normal, 01=blink, 10=reverse, 11=underscor
                    bits 2-4: 000=default,001=blue,010=red,011=pink,
                              100=green,101=turquoise,110=yellow,111=white
        BYTE    extended color
                01h other than base color is in effect

(Table 03367)
Values for Banyan VINES 3270 keyboard status:
 00h    UNLOCK - ready to accept data
 01h    TIME - aid was struck
 02h    SYSTEM - received response no restore
 03h    FUNCTION - unavailable keyboard function
 04h    INPUT - not currently used
 05h    ENDFIELD - field filled in insert mode
 06h    PROTECTED - attempt to enter in protected field
 07h    NUMERIC - attempt to enter in numeric field
 08h    PROGRAM - error in outbound data stream

Format of Banyan VINES 3270 profile block:
Offset  Size    Description     (Table 03368)
 00h 64 BYTEs   gateway service name
 40h 16 BYTEs   gateway comm port address
 50h    WORD    primary logical unit number
 52h    WORD    secondary logical unit type
 54h    WORD    secondary logical unit number
 56h    WORD    printer assignment
 58h 50 BYTEs   keyboard definitions filename
--------V-610002-----------------------------
INT 61 - OPTIMA 1024 VGA-Sync,ET-3000 chipset - END ZOOM
        AX = 0002h
Desc:   switches off zoom and returns window to its original state
Range:  unknown
Notes:  INT 61h is the default interrupt; the actual interrupt number can be
          obtained by calling INT 16/AH=FFh
        not all vendors include the Tseng TSR which supports these functions
SeeAlso: AX=0000h"OPTIMA",INT 16/AH=FFh"OPTIMA"
--------N-610003SF00-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - INIT USER BUFFER PTR INFO
        AX = 0003h subfn 00h
        DS:BX -> argument block (see #03370)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=06h,AX=0003h/SF=08h,AX=0003h/SF=0Dh

(Table 03369)
Values for VINES function status:
 0000h  successful
 000Bh  invalid session ID
 000Ch  session not active
 000Dh  invalid request type
 000Eh  invalid parameters
 000Fh  out of heap space
 0010h  timeout on send
 0011h  Banyan communications error
 0012h  session not waiting for host
 0013h  session is active
 0014h  duplicate suspend session request
 0015h  no session suspended
 0016h  ring data buffer full
 0017h  printer error encountered
 0018h  Banyan communications error
 0019h  unable to make connection
 001Ah  no ring buffer specified at startup
 001Bh  service is down
 001Ch  invalid service name
 001Dh  service is closed
 001Eh  invalid connection name
 001Fh  max session limit reached for service
 0020h  access rights list for connection/dialout does not include this user
 0021h  service not responding
 0022h  missing telephone number
SeeAlso: #03325,#03373

Format of VINES argument block:
Offset  Size    Description     (Table 03370)
 00h    BYTE    session ID (00h)
 01h    BYTE    00h (func "initialize user buffer pointer information area")
 02h    WORD    -> user buffer ptr info area in caller's current DS (see #03371)

Format of user buffer ptr info area:
Offset  Size    Description     (Table 03371)
 00h    WORD    flags
                0000h don't read interface's data buffer
                0001h read data buffer
 02h    DWORD   pointer to ring buffer
 06h    WORD    length of ring buffer
 08h    WORD    ring buffer offset to last byte read by caller
 0Ah    DWORD   pointer to WORD containing offset of last byte
                  in ring buffer filled
 0Eh    DWORD   pointer to screen buffer
 12h    DWORD   pointer to field containing cursor position
 16h    DWORD   pointer to terminal status area (see #03372)

Format of VINES terminal status area:
Offset  Size    Description     (Table 03372)
 00h    BYTE    status of session: 4Eh=oNline, 46h=oFfline, 57h=Waiting
 01h    BYTE    terminal type (00h=VT100, 01h=TTY, 02h=VT52, 03h=IBM3101)
 02h    BYTE    current keypad mode (VT100,VT52 only)
                4Eh ("N") numeric mode
                41h ("A") application mode
 03h  4 BYTEs   current state of LEDs (VT100 only)
                00h off
                01h on
 07h    WORD    line error count
 09h    WORD    primary error code (see #03373)
 0Bh    WORD    secondary error code

(Table 03373)
Values for VINES primary error code:
 0000h  no error
 0001h  unable to make connection
 0002h  communications error, restart session
 0003h  async terminal emulation service unavailable
 0004h  lost carrier
 0005h  all matching lines busy
 0006h  no lines defined for connection name
 0007h  no dial lines available on server
 0008h  no matching dial lines available
 0009h  out of heap space
 000Ah  service error encountered
 000Bh  timed out waiting to connect
 000Ch  communications error
 000Dh  communications error
 000Eh  host wants file transferred to/from PC
 000Fh  host software changed session parameter
 0010h  host software changed tap settings
 0011h  host software changed LED indicator
 0012h  host software changed display background (secondary error code 00h for
          white on black, 01h for black on white)
 0013h  host software changed display option (secondary error code 00h for off,
          01h for on)
 0014h  communications error
 0015h  communications error
 0016h  unable to make connection
 0017h  unable to make connection
SeeAlso: #03369
--------N-610003SF01-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - SEND TO HOST
        AX = 0003h subfn 01h
        DS:BX -> argument block (see #03374)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=00h,AX=0003h/SF=02h,AX=0003h/SF=14h

Format of VINES argument block for Function 0003h subfunction 01h:
Offset  Size    Description     (Table 03374)
 00h    BYTE    session ID (00h)
 01h    BYTE    01h (function "send to host")
 02h    BYTE    type
                00h ASCII byte
                01h ASCII string
                02h terminal function code
                03h up arrow
                04h down arrow
                05h left arrow
                06h right arrow
                07h break
 03h  N BYTEs   type-specific info (see #03375)

Format of type-specific info:
Offset  Size    Description     (Table 03375)
---ASCII byte---
 03h    BYTE    byte to send to host
---ASCII string---
 03h    WORD    length of string
 05h    WORD    pointer to string
---terminal function code (VT52/VT100)---
 03h    BYTE    function code
                00h keypad 0
                01h keypad 1
                ...
                09h keypad 9
                0Ah keypad -
                0Bh keypad ,
                0Ch keypad .
                0Dh keypad ENTER
                0Eh PF1
                0Fh PF2
                10h PF3
                11h PF4
---terminal function code (IBM3101)---
 03h    BYTE    function code
                00h PF1
                ...
                07h PF8
                08h Home
SeeAlso: #03374
--------N-610003SF02-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - "CONTROL MONITOR"
        AX = 0003h subfn 02h
        DS:BX -> argument block (see #03376)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=03h,AX=0003h/SF=05h

Format of VINES argument block for Function 0003h subfunction 02h:
Offset  Size    Description     (Table 03376)
 00h    BYTE    session ID (00h)
 01h    BYTE    02h (function "control monitor")
 02h    BYTE    display flag
                00h don't display data received from host
                01h display data
--------N-610003SF03-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - "FLOW CONTROL DATA"
        AX = 0003h subfn 03h
        DS:BX -> argument block (see #03377)
Return: AX = status (see #03369)
Desc:   this function permits the caller to freeze/unfreeze the display and
          the ring buffer
SeeAlso: AX=0003h/SF=02h,AX=0003h/SF=06h

Format of VINES argument block for Function 0003h subfunction 03h:
Offset  Size    Description     (Table 03377)
 00h    BYTE    session ID (00h)
 01h    BYTE    03h (function "flow control data")
 02h    BYTE    flow control flag
                00h allow characters to be put into display or ring buffer
                01h don't place any more characters into display or ring buffer
--------N-610003SF04-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - END ACTIVE SESSION
        AX = 0003h subfn 04h
        DS:BX -> argument block (see #03378)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=0Ah,AX=0003h/SF=0Dh,AX=0003h/SF=0Fh

Format of VINES argument block for ending active session:
Offset  Size    Description     (Table 03378)
 00h    BYTE    session ID (00h)
 01h    BYTE    04h (function "end active session")
--------N-610003SF05-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - SET SESSION PARAMETER
        AX = 0003h subfn 05h
        DS:BX -> argument block (see #03379)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=00h,AX=0003h/SF=06h,AX=0003h/SF=08h

Format of VINES argument block for setting session parameters:
Offset  Size    Description     (Table 03379)
 00h    BYTE    session ID (00h)
 01h    BYTE    05h (function "set session parameter")
 02h    BYTE    parameter number (see #03380)
 03h    BYTE    new parameter value

(Table 03380)
Values for parameter number:
 00h    line speed (00h=any, 01h=50, 02h=110, 03h=134.5, 04h=150,
                  05h=300, 06h=600, 07h=1200, 08h=2400, 09h=4800, 0Ah=9600)
 01h    parity (00h=none, 01h=odd, 02h=even)
 02h    duplex (00h=full, 01h=half)
 03h    character size (00h=7 bits, 01h=8 bits)
 04h    stop bits (00h=1, 01h=2)
 05h    XON/XOFF flow control (00h=no, 01h=yes)
 07h    intercharacter delay in tenths of a second
 08h    interline delay in tenths of a second
 09h    auto linefeed (00h=no, 01h=yes)
 0Ah    filter control characters (00h=no, 01h=yes)
 0Bh    terminal type (00h=VT100,01h=glassTTY,02h=VT52,03h=IBM3101)
 0Ch    auto wrap (00h=no, 01h=yes)
 0Dh    cursor shape (00h=underscore, 01h=block)
 0Eh    character set (00h=UK, 01h=US ASCII)
 0Fh    printer port (00h=LPT1, 01h=LPT2, 02h=LPT3)
SeeAlso: #03379
--------N-610003SF06-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - GET SESSION PARAMETER
        AX = 0003h subfn 06h
        DS:BX -> argument block (see #03381)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=00h,AX=0003h/SF=05h,AX=0003h/SF=07h

Format of VINES argument block for getting session parameters:
Offset  Size    Description     (Table 03381)
 00h    BYTE    session ID (00h)
 01h    BYTE    06h (function "get session parameter")
 02h    BYTE    parameter number (see #03380)
 03h    BYTE    (ret) current parameter value
--------N-610003SF07-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - SET TAB SETTINGS
        AX = 0003h subfn 07h
        DS:BX -> argument block (see #03382)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=05h,AX=0003h/SF=08h

Format of VINES argument block for setting tab settings:
Offset  Size    Description     (Table 03382)
 00h    BYTE    session ID (00h)
 01h    BYTE    07h (function "set tab settings")
 02h    WORD    pointer to 80-byte buffer in caller's current DS
                  each byte = 00h if no tab, 01h if tab at that position
--------N-610003SF08-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - GET TAB SETTINGS
        AX = 0003h subfn 08h
        DS:BX -> argument block (see #03383)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=06h,AX=0003h/SF=07h

Format of VINES argument block for getting tab settings:
Offset  Size    Description     (Table 03383)
 00h    BYTE    session ID (00h)
 01h    BYTE    08h (function "get tab settings")
 02h    WORD    pointer to 80-byte buffer in caller's current DS
                each byte set to 00h if no tab, 01h if tab at that position
--------N-610003SF09-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - REFRESH EMULATION SCREEN
        AX = 0003h subfn 09h
        DS:BX -> argument block (see #03384)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=00h,AX=0003h/SF=0Bh

Format of VINES argument block for Function 0003h subfunction 09h:
Offset  Size    Description     (Table 03384)
 00h    BYTE    session ID (00h)
 01h    BYTE    09h (function "refresh emulation screen")
--------N-610003SF0A-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - SUSPEND SESSION TEMPORARILY
        AX = 0003h subfn 0Ah
        DS:BX -> argument block (see #03385)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=04h,AX=0003h/SF=09h,AX=0003h/SF=0Bh,AX=0003h/SF=0Dh

Format of VINES argument block:
Offset  Size    Description     (Table 03385)
 00h    BYTE    session ID (00h)
 01h    BYTE    0Ah (function "suspend session temporarily")
 02h    WORD    size of session information to be saved
 04h    WORD    pointer to buffer in caller's DS
--------N-610003SF0B-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - RESUME SUSPENDED SESSION
        AX = 0003h subfn 0Bh
        DS:BX -> argument block (see #03386)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=09h,AX=0003h/SF=0Ah

Format of VINES argument block:
Offset  Size    Description     (Table 03386)
 00h    BYTE    session ID (00h)
 01h    BYTE    0Bh (function "restore previously suspended session")
 02h    WORD    size of buffer into which session info is restored
 04h    WORD    pointer to buffer in caller's DS
--------N-610003SF0C-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - SET SCROLL LOCK CHECKING
        AX = 0003h subfn 0Ch
        DS:BX -> argument block (see #03387)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=00h

Format of VINES argument block:
Offset  Size    Description     (Table 03387)
 00h    BYTE    session ID (00h)
 01h    BYTE    0Ch (function "set state of scroll lock checking")
 02h    BYTE    check_scroll_lock flag
                00h off
                01h on (display of host data stopped while ScrollLock on)
--------N-610003SF0D-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - EXIT EMULATION
        AX = 0003h subfn 0Dh
        DS:BX -> argument block (see #03388)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=04h,AX=0003h/SF=0Ah

Format of VINES argument block:
Offset  Size    Description     (Table 03388)
 00h    BYTE    session ID (00h)
 01h    BYTE    0Dh (function "exit emulation")
--------N-610003SF0E-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - INTERRUPT ON CHAR FROM HOST
        AX = 0003h subfn 0Eh
        DS:BX -> argument block (see #03389)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=00h,AX=0003h/SF=14h

Format of VINES argument block:
Offset  Size    Description     (Table 03389)
 00h    BYTE    session ID (00h)
 01h    BYTE    0Eh (function "interrupt on character from host")
 02h    DWORD   pointer to routine to be called (0000h:0000h = don't call)
 06h    DWORD   stack pointer to use when call is made
--------N-610003SF0F-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - START A SESSION
        AX = 0003h subfn 0Fh
        DS:BX -> argument block (see #03390)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=04h,AX=0003h/SF=0Bh

Format of VINES argument block:
Offset  Size    Description     (Table 03390)
 00h    BYTE    session ID (00h)
 01h    BYTE    0Fh (function "start a session")
 02h    WORD    pointer to information area in caller's current DS (see #03391)

Format of VINES information area:
Offset  Size    Description     (Table 03391)
 00h    WORD    length of service name
 02h    WORD    pointer to service name in caller's DS
 04h    BYTE    type of connection (00h=connection name, 01h=dialout)
 05h    WORD    length of connection name/telephone number
 07h    WORD    pointer to connection name/telephone number
--------N-610003SF10-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - START/STOP PRINTING
        AX = 0003h subfn 10h
        DS:BX -> argument block (see #03392)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=06h,AX=0003h/SF=13h

Format of VINES argument block:
Offset  Size    Description     (Table 03392)
 00h    BYTE    session ID (00h)
 01h    BYTE    10h (function "start/stop printing of data received from host")
 02h    WORD    print capture flag (00h=off, 01h=on)
--------N-610003SF11-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - GET FILE TRANSFER PARAMETERS
        AX = 0003h subfn 11h
        DS:BX -> argument block (see #03393)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=00h,AX=0003h/SF=12h

Format of VINES argument block:
Offset  Size    Description     (Table 03393)
 00h    BYTE    session ID (00h)
 01h    BYTE    11h (function "get file transfer parameters")
 02h    WORD    pointer to info area in caller's current DS (see #03394)

Format of VINES info area:
Offset  Size    Description     (Table 03394)
 00h    BYTE    protocol flag (00h none, 01h Kermit)
 01h    BYTE    direction flag (00h send, 01h receive)
 02h    BYTE    length of null-terminated PC filename
 03h    DWORD   pointer to null-terminated PC filename
 07h    BYTE    length of null-terminated host filename
 08h    DWORD   pointer to null-terminated host filename
--------N-610003SF12-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - GET CONNECTION INFORMATION
        AX = 0003h subfn 12h
        DS:BX -> argument block (see #03395)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=11h,AX=0003h/SF=15h

Format of VINES argument block:
Offset  Size    Description     (Table 03395)
 00h    BYTE    session ID (00h)
 01h    BYTE    12h (function "get connection information")
 02h    WORD    offset of buffer for connection information (see #03396)

Format of VINES connection information:
Offset  Size    Description     (Table 03396)
 00h    WORD    length of service name (returned)
 02h    WORD    pointer to 64-byte buffer for service name
 04h    BYTE    type of connection
                00h connection name
                01h dialout
 05h    WORD    length of connection name/telephone number
 07h    WORD    pointer to 64-byte buffer for name/telno
 09h    BYTE    server line number being used (returned)
--------N-610003SF13-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - START/STOP TRACING TRAFFIC
        AX = 0003h subfn 13h
        DS:BX -> argument block (see #03397)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=00h,AX=0003h/SF=0Eh

Format of VINES argument block:
Offset  Size    Description     (Table 03397)
 00h    BYTE    session ID (00h)
 01h    BYTE    13h (function "start/stop tracing data traffic in session")
 02h    BYTE    trace flag (00h=off, 01h=on)
--------N-610003SF14-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - INTERRUPT ON HOST MESSAGE
        AX = 0003h subfn 14h
        DS:BX -> argument block (see #03398)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=0Eh

Format of VINES argument block:
Offset  Size    Description     (Table 03398)
 00h    BYTE    session ID (00h)
 01h    BYTE    14h (function "interrupt on message from host")
 02h    DWORD   pointer to routine to be called (0000h:0000h = don't call)
 06h    DWORD   stack pointer to use when call is made
--------N-610003SF15-------------------------
INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - RESET ERROR
        AX = 0003h subfn 15h
        DS:BX -> argument block (see #03399)
Return: AX = status (see #03369)
SeeAlso: AX=0003h/SF=00h,AX=0003h/SF=12h

Format of VINES argument block:
Offset  Size    Description     (Table 03399)
 00h    BYTE    session ID (00h)
 01h    BYTE    15h (function "reset error")
--------V-610003-----------------------------
INT 61 - OPTIMA 1024 VGA-Sync,ET-3000 chipset - REPORT ZOOM FACTOR
        AX = 0003h
Return: AX = zoom factor
Desc:   returns the current zoom factor
Range:  unknown
Notes:  INT 61h is the default interrupt; the actual interrupt number can be
          obtained by calling INT 16/AH=FFh
        not all vendors include the Tseng TSR which supports these functions
SeeAlso: AX=0000h"OPTIMA",AX=0005h"OPTIMA",INT 16/AH=FFh"OPTIMA"
--------N-610004-----------------------------
INT 61 - Banyan VINES - FILE SERVICE CONTROL
        AX = 0004h
        DS:DX -> request block (see #03401)
Return: AX = status (see #03400)
Notes:  This service is handled by the redirector
        The request dispatch table contains dummy entries for requests 0Ah,
          0Dh, 15h, 19h, and 1Ah, which always return error 0033h (invalid
          request ID)

(Table 03400)
Values for Banyan VINES file service control status code:
 0000h  successful
 0002h  file not found
 0003h  path not found
 000Fh  invalid drive
 0015h  drive not ready
 0033h  invalid request ID
 0034h  drive not connected
 0037h  drive number out of range
 0038h  drive number not available
 003Ah  invalid operation
 0055h  drive already connected
 0057h  invalid number of entries

Format of Banyan VINES file service request block:
Offset  Size    Description     (Table 03401)
 00h    WORD    request ID (1..28)
 02h  n BYTES   additional parameters and result buffer
--------N-610004SF0001-----------------------
INT 61 - Banyan VINES - SET DRIVE CONNECTION
        AX = 0004h subfn 0001h
        DS:DX -> request block (see #03402)
Return: AX = status (0000h,0037h,0038h,0055h) (see #03400)
Desc:   Maps the specified file service to a DOS drive letter
Note:   If an empty service name is specified, an existing connection will
          be removed
SeeAlso: AX=0004h/SF=0002h

Format of VINES Function 0004h/Subfunction 0001h request block:
Offset  Size    Description     (Table 03402)
 00h    WORD    0001h
 02h    BYTE    drive number (0=default, 1=A, ...)
 03h 16 BYTEs   reserved
 13h 64 BYTEs   null-terminated file service name
 53h  5 BYTEs   reserved
--------N-610004SF0002-----------------------
INT 61 - Banyan VINES - GET DRIVE CONNECTION
        AX = 0004h subfn 0002h
        DS:DX -> request block (see #03403)
Return: AX = status (0000h,0034h,0037h) (see #03400)
Desc:   Returns the StreetTalk name of the associated file service
SeeAlso: AX=0004h/SF=0001h,AX=0004h/SF=0003h

Format of VINES Function 0004h/Subfunction 0002h request block:
Offset  Size    Description     (Table 03403)
 00h    WORD    0002h
 02h    BYTE    drive number (0=default, 1=A, ...)
 03h 16 BYTEs   reserved
 13h 64 BYTEs   buffer for null-terminated file service name
 53h  5 BYTEs   reserved
--------N-610004SF0003-----------------------
INT 61 - Banyan VINES - GET NETWORK DRIVE MAP
        AX = 0004h subfn 0003h
        DS:DX -> request block (see #03404)
Return: AX = status
            0000h drive map returned in request block
Desc:   Returns a bit map indicating which drive numbers are connected to a
          file service
Note:   Only bits 0-25 are significant
SeeAlso: AX=0004h/SF=0002h

Format of VINES Function 0004h/Subfunction 0003h request block:
Offset  Size    Description     (Table 03404)
 00h    WORD    0003h
 02h    DWORD   buffer for drive map (bit0=A, bit1=B, ...)
--------N-610004SF0004-----------------------
INT 61 - Banyan VINES - SET USER NAME
        AX = 0004h subfn 0004h
        DS:DX -> request block (see #03405)
Return: AX = status (0000h) (see #03400)
Notes:  Other side effects, if any, not known
SeeAlso: AX=0004h/SF=0005h,#03431 [ID 0004h],AX=0007h/BX=0005h

Format of VINES Function 0004h/Subfunction 0004h request block:
Offset  Size    Description     (Table 03405)
 00h    WORD    0004h
 02h 64 BYTE    null-terminated user name
--------N-610004SF0005-----------------------
INT 61 - Banyan VINES - GET USER NAME
        AX = 0004h subfn 0005h
        DS:DX -> request block (see #03406)
Return: AX = status (see also #03400)
            0000h user name returned in request block
Desc:   Returns the StreetTalk name of the currently logged in user
SeeAlso: AX=0004h/SF=0004h,#03431 [ID 0004h],AX=0007h/BX=0005h
SeeAlso: AX=0004h/SF=0004h

Format of VINES Function 0004h/Subfunction 0005h request block:
Offset  Size    Description     (Table 03406)
 00h    WORD    0005h (subfunction "Get User Name")
 02h 64 BYTE    buffer for null-terminated user name
--------N-610004SF0006-----------------------
INT 61 - Banyan VINES - TEST DRIVE CONNECTION
        AX = 0004h subfn 0006h
        DS:DX -> request block (see #03407)
Return: AX = status (see also #03400)
            0000h connection flag returned in request block
Desc:   Returns a flag indicating if the drive is connected to a file service
SeeAlso: AX=0004h/SF=0007h

Format of VINES Function 0004h/Subfunction 0006h request block:
Offset  Size    Description     (Table 03407)
 00h    WORD    0006h (subfunction "Test Drive Connection")
 02h    BYTE    buffer for connection flag (1 = not connected, 2 = connected)
--------N-610004SF0007-----------------------
INT 61 - Banyan VINES - GET CONNECTION DATA STRUCTURES
        AX = 0004h subfn 0007h
        DS:DX -> request block (see #03408)
Return: AX = status (see also #03400)
            0000h pointer returned in request block
            0033h invalid request ID
Desc:   Returns pointers to various internal data structures

Format of VINES Function 0004h/Subfunction 0007h request block:
Offset  Size    Description     (Table 03408)
 00h    WORD    0007h
 02h    BYTE    request ID (0..7) (see #03409)
 03h    WORD    buffer for pointer segment
 05h    WORD    buffer for pointer offset
SeeAlso: #03410,#03411

(Table 03409)
Values for VINES pointer ID:
 00h    job file table ???
 01h    drive handle table
 02h    drive connection table
 03h    IPC port of drive Z:
 04h    end of drive connection table
 05h    ???
 06h    ???
 07h    redirector data segment (offset=0)
SeeAlso: #03408

Format of VINES drive handle table:
Offset  Size    Description     (Table 03410)
 00h    BYTE    handle to default drive (0 = not connected)
 01h    BYTE    handle to drive A: (0 = not connected)
        ...
 1Ah    BYTE    handle to drive Z: (0 = not connected)
SeeAlso: #03411

Format of VINES drive connection table:
Offset  Size    Description     (Table 03411)
 00h    WORD    file service type (?) (0001h if drive Z:, 0000h else)
 02h 16 BYTEs   IPC port (contains the server serial number)
 12h 46 BYTEs   ???
 40h 64 BYTEs   null-terminated StreetTalk name of associated file service
 80h 64 BYTEs   null-terminated root directory (/ROOT: parameter of SETDRIVE)
SeeAlso: #03410
--------N-610004SF0008-----------------------
INT 61 - Banyan VINES - GET SERVER SERIAL NUMBER
        AX = 0004h subfn 0008h
        DS:DX -> request block (see #03412)
Return: AX = status (0000h,000Fh,0015h) (see #03400)
Notes:  The server ID is extracted from the IPC port address of the associated
          file service stored in the drive connection table
        The server serial number and the server subnet number are returned in
          big-endian (Motorola) format (i.e. MSB first)
SeeAlso: AX=0004h/SF=0005h

Format of VINES request block for getting server serial number:
Offset  Size    Description     (Table 03412)
 00h    WORD    0008h
 02h    WORD    drive number (0=default, 1=A, ...)
 04h    DWORD   buffer for server serial number
 08h    WORD    buffer for server subnet number (always 0001h)
--------N-610004SF0009-----------------------
INT 61 - Banyan VINES - SET ??? PARAMETER
        AX = 0004h subfn 0009h
        DS:DX -> request block (see #03413)
Return: AX = status (0000h) (see #03400)
Notes:  The specified WORD parameter is copied to offset 1702h of the
          redirector code segment (revision 5.53)
SeeAlso: AX=0004h/SF=000Bh

Format of VINES Function 0004h/Subfunction 0009h request block:
Offset  Size    Description     (Table 03413)
 00h    WORD    0009h
 02h    WORD    parameter
--------N-610004SF000B-----------------------
INT 61 - Banyan VINES - GET ??? DRIVE PARAMETER
        AX = 0004h subfn 000Bh
        DS:DX -> request block (see #03414)
Return: AX = status (0000h,0034h,0037h) (see #03400)
Notes:  This request returns a WORD value from the drive connection table
          read from offset 0012h of the specified drive's entry (usually 0037h)
SeeAlso: AX=0004h/SF=0009h

Format of VINES Function 0004h/Subfunction 000Bh request block:
Offset  Size    Description     (Table 03414)
 00h    WORD    000Bh
 02h    BYTE    drive number (0=default, 1=A, ...)
 03h    WORD    buffer for parameter
--------N-610004SF000C-----------------------
INT 61 - Banyan VINES - LOGOUT FROM VINES
        AX = 0004h subfn 000Ch
        DS:DX -> request block (see #03415)
Return: AX = status 0000h (see #03400)
Desc:   Terminates a running VINES session and clears all session specific
          buffers
SeeAlso: AX=0004h/SF=0008h

Format of VINES Function 0004h/Subfunction 000Ch request block:
Offset  Size    Description     (Table 03415)
 00h    WORD    000Ch
--------N-610004SF000E-----------------------
INT 61 - Banyan VINES - GET ACCESS RIGHTS LIST (ARL)
        AX = 0004h subfn 000Eh
        DS:DX -> request block (see #03416)
Return: AX = status (see also #03400)
            0000h request has been processed
Desc:   Returns the owner, group, and extended access rights for the specified
          file or directory
Note:   A status of 0000h does not necessarily indicate a successful request;
          check the status word at offset 000Eh of the request block too
SeeAlso: AX=0004h/SF=000Fh

Format of VINES Function 0004h/Subfunction 000Eh request block:
Offset  Size    Description     (Table 03416)
 00h    WORD    000Eh (subfunction "Get Access Rights List")
 02h    BYTE    drive number (0=default, 1=A, ...)
 03h    BYTE    reserved
 04h    DWORD   pointer to path specification (drive letter ignored)
 08h    DWORD   pointer to ARL control block (see #03417)
 0Ch    WORD    buffer for number of ARL entries (1..5)
 0Eh    WORD    buffer for status (see #03418)

Format of ARL control block:
Offset  Size    Description     (Table 03417)
 00h 64 BYTEs   1st StreetTalk name (user, list, or service)
 40h    WORD    1st ARL
 42h 64 BYTEs   2nd StreetTalk name (user, list, or service)
 82h    WORD    2nd ARL
 84h 64 BYTEs   3rd StreetTalk name (user, list, or service)
 C4h    WORD    3rd ARL
 C6h 64 BYTEs   4th StreetTalk name (user, list, or service)
106h    WORD    4th ARL
108h 64 BYTEs   5th StreetTalk name (user, list, or service)
148h    WORD    5th ARL

(Table 03418)
Values for VINES Get/Set Access Rights List status:
 0000h  successful
 0002h  file not found
 0003h  path not found
 003Ah  invalid operation
 0057h  invalid number of entries
--------N-610004SF000F-----------------------
INT 61 - Banyan VINES - SET ACCESS RIGHTS LIST (ARL)
        AX = 0004h subfn 000Fh
        DS:DX -> request block (see #03419)
Return: AX = status (see also #03400)
            0000h request has been processed
Desc:   Sets the owner, group, and extended access rights for the specified
          file or directory
Note:   A status of 0000h does not necessarily indicate a successful request;
          check the status word at offset 000Eh of the request block too
        If the number of ARL entries is less than 1 or greater than 5, error
          0057h (invalid number of entries) is returned
SeeAlso: AX=0004h/SF=000Eh

Format of VINES Function 0004h/Subfunction 000Fh request block:
Offset  Size    Description     (Table 03419)
 00h    WORD    000Fh
 02h    BYTE    drive number (0=default, 1=A, ...)
 03h    BYTE    reserved
 04h    DWORD   pointer to path specification (drive letter ignored)
 08h    DWORD   pointer to ARL control block (see #03417)
 0Ch    WORD    number of ARL entries (1..5)
 0Eh    WORD    buffer for status (see #03418)
--------N-610004SF0010-----------------------
INT 61 - Banyan VINES - FILE SERVICE CONTROL - ???
        AX = 0004h subfn 0010h
        DS:DX -> request block (see #03420)
Return: AX = status (see also #03400)
            0000h request has been processed
SeeAlso: AX=0004h/SF=000Fh

Format of VINES Function 0004h/Subfunction 0010h request block:
Offset  Size    Description     (Table 03420)
 00h    WORD    0010h
 02h    BYTE    drive number (0=default, 1=A, ...)
 03h    BYTE    reserved
 04h 64 BYTEs   ???
 44h 16 BYTEs   IPC port (see #03328 at AX=0001h"Sosock")
--------N-610004SF0013-----------------------
INT 61 - Banyan VINES - GET VALUE OF GLOBAL VARIABLE
        AX = 0004h subfn 0013h
        DS:DX -> request block (see #03421)
Return: AX = status (see also #03400)
            0000h successful
            0033h invalid request ID (returned if variable index out of range)
Desc:   Returns the value of the specified global variable
Note:   The data will be truncated if the specified buffer is not large enough.
          Check the length word in the request block to find out how many
          bytes should have been copied.
SeeAlso: AX=0004h/SF=0014h,AX=0006h

Format of request block:
Offset  Size    Description     (Table 03421)
 00h    WORD    0013h
 02h    WORD    variable index (0000h-001Fh) (see #03422)
 04h    WORD    buffer length (on exit set to # of bytes actually needed)
 06h    DWORD   far pointer to result buffer
SeeAlso: #03423

(Table 03422)
Values for variable indices:
Index   Length  Description
 0000h     1    ???
 0001h    16    StreetTalk port
 0002h     4    StreetTalk session handle
 0003h     6    colors
 0004h    64    StreetTalk name of currently logged in user
 0005h     0    old clear text password (not applicable)
 0006h     0    default group (not applicable)
 0007h     1    number of messages in message queue
 0008h     1    message flag
 0009h    16    TalkPort
 000Ah     2    TalkPort socket
 000Bh    64    StreetTalk name of mail service
 000Ch     2    message timeout
 000Dh     2    next message place
 000Eh   246    message queue (3 times 80 characters + 2 flag bytes)
 000Fh    14    system nonce
 0010h     2    failed login count
 0011h     1    new mail message received
 0012h     8    mail service capabilities
 0013h     3    printer port diverted
 0014h    32    international location
 0015h    16    IPC port of drive Z:
 0016h  1024    pointer to current directory table
 0017h     2    maximum number of file volume mappings
 0018h    24    routine to call back for messages (6 far pointers)
 0019h     4    current virtual machine
 001Ah    20    DOS redirector message bell tones
 001Bh     2    various flags used for internal communication
 001Ch     0    OS/2 client configuration (not applicable)
 001Dh     8    redirector/IFS file version
 001Eh     0    reserved (not applicable)
 001Fh     4    address of VVINESD.386 dispatch
--------N-610004SF0014-----------------------
INT 61 - Banyan VINES - SET VALUE OF GLOBAL VARIABLE
        AX = 0004h subfn 0014h
        DS:DX -> request block (see #03423)
Return: AX = status
            0000h successful
            0033h invalid request ID (returned if variable index out of range)
Desc:   Assigns a new value to the specified global variable
Note:   If the specified number of bytes to copy exceeds the size of the
          destination variable, nothing will be copied.
SeeAlso: AX=0004h/SF=0013h,AX=0006h

Format of request block:
Offset  Size    Description     (Table 03423)
 00h    WORD    0014h
 02h    WORD    variable index (0000h-001Fh) (see #03422)
 04h    WORD    number of bytes to copy
 06h    DWORD   far pointer to new value
SeeAlso: #03421
--------N-610004SF0016-----------------------
INT 61 - Banyan VINES - GET NUMBER OF OPEN FILES ON REMOTE DRIVE
        AX = 0004h subfn 0016h
        DS:DX -> request block (see #03424)
Return: AX = status
            0000h open file count returned in request block
Desc:   Counts the number of open files on the specified remote drive.
Note:   No error is returned if the specified drive number is invalid or points
          to a local drive. Use AX=0004h/SF=0006h to test if a given drive
          number is assigned to a remote drive.
SeeAlso: AX=0004h/SF=0006h

Format of request block:
Offset  Size    Description     (Table 03424)
 00h    WORD    0016h
 02h    BYTE    drive number (0=default, 1=A:, ...)
 03h    BYTE    reserved
 04h    WORD    buffer for open file count
SeeAlso: #03426
--------N-610004SF0018-----------------------
INT 61 - Banyan VINES - SET UNIDENTIFIED INTERNAL FLAG
        AX = 0004h subfn 0018h
        DS:DX -> request block (see #03425)
Return: AX = status
            0000h success
Desc:   Sets an unidentified BYTE variable in the redirector data segment to 1.
Note:   In the VINES 5.53 "REDIR4" redirector, this variable is located at
          DS:0B53.

Format of request block:
Offset  Size    Description     (Table 03425)
 00h    WORD    0018h
SeeAlso: #03426
--------N-610004SF001B-----------------------
INT 61 - Banyan VINES - UNIDENTIFIED DRIVE SPECIFIC FUNCTION
        AX = 0004h subfn 001Bh
        DS:DX -> request block (see #03426)
Return: AX = status
            0000h success
            0034h drive not connected
            0037h drive number out of range
Desc:   The purpose of this function is not known.

Format of request block:
Offset  Size    Description     (Table 03426)
 00h    WORD    001Bh
 02h    BYTE    drive number (0=default, 1=A:, ...)
 03h    BYTE    ???
 04h    WORD    ???
 06h    DWORD   far pointer to data area
 0Ah    WORD    ???
 0Ch    DWORD   far pointer to data area
 10h    WORD    buffer for result
SeeAlso: #03424,#03426
--------N-610004SF001C-----------------------
INT 61 - Banyan VINES - UNIDENTIFIED FUNCTION
        AX = 0004h subfn 001Ch
        DS:DX -> request block (see #03427)
Return: AX = status
            0000h success
            0057h invalid number of entries
Desc:   The purpose of this function is not known.

Format of request block:
Offset  Size    Description     (Table 03427)
 00h    WORD    001Ch
 02h    WORD    ???
 04h    WORD    ???
 06h    WORD    ???
 08h    WORD    ???
 0Ah    DWORD   far pointer to data area (14 bytes)
--------V-610004-----------------------------
INT 61 - OPTIMA 1024 VGA-Sync,ET-3000 chipset - ENTER SPECIFY MODE
        AX = 0004h
Range:  unknown
Notes:  Specify Mode is enabled by hot key (seeAlso below), and allows
          panning and zooming via the numeric keypad.
        INT 61 is the default interrupt; the actual interrupt number can be
          obtained by calling INT 16/AH=FFh
        not all vendors include the Tseng TSR which supports these functions
SeeAlso: AX=0000h"OPTIMA",AX=0007h"OPTIMA",INT 16/AH=FFh"OPTIMA"
--------N-610005-----------------------------
INT 61 - Banyan VINES - PRINT SERVICE CONTROL
        AX = 0005h
        DS:DX -> request block (see #03428)
Return: AX = status
            0000h successful
            0001h network software not installed or incompatible
Notes:  This service is handled by the redirector
        The size of the request/result block depends on the selected function
          and the value at offset 04h.
SeeAlso: INT 2F/AX=D702h

Format of VINES request/result block for printer control:
Offset  Size    Description     (Table 03428)
 00h    WORD    function
                0201h "endspool" all data for a print job has been sent
                      (no bytes returned)
                0202h "deassign" the virtual printer port
                    Before the printer port is deassigned all data sent
                      to it is endspooled.
                      (no bytes returned)
                0205h "get_active" get currently active printer port
                      (1 byte required for result)
                    Returns:  - the currently active printer port (1-3) (0 if
                                  there is none)
                0207h ??? purpose unknown; called periodically every second
                020Ch "get_bannertitle" gets the title which is printed on the
                      banner page of a print job sent to the virtual port
                      (16 bytes required for result)
                    Returns:  - the null-terminated banner title
                020Eh "get_servicename" gets the name of the print service
                      assigned to the virtual port
                      (64 bytes required for result)
                    Returns:  - the null-terminated print service name assigned
                                  to the virtual port
                0210h "set_bannertitle" sets the title which is printed on the
                      banner page of a print job sent to the virtual port
                      (16 bytes required for input)
                    Input:  - the null-terminated banner title (max 16 chars)
                0212h "set_servicename" sets the name of the print service
                      assigned to the virtual port
                      (64 bytes required for input)
                    Input:  - the null-terminated print service name
                                  (max 64 chars)
                0216h "get_job_paper_format" gets the paper format for
                      subsequent print jobs
                      (16 bytes required for result)
                    Returns:  - the null-terminated paper format
                0217h "set_job_paper_format" sets the paper format for
                      subsequent print jobs
                      (16 bytes required for input)
                    Input:  - the null-terminated paper format (max 16 chars)
 02h    WORD    number of active virtual port (1-3) (0 for function 0205h)
 04h    WORD    Offset into the request block from which additional input
                  is to be read and/or at which the result is to be copied
                  (if there is any). Therefore the smallest block size for a
                  function which returns a result is
                        this offset + the maximum number of returned bytes - 1
 06h    WORD    0000h
--------V-610005-----------------------------
INT 61 - OPTIMA 1024 VGA-Sync - QUERY ZOOM WINDOW
        AX = 0005h
        BX:CX -> buffer for window parameters (see #03429)
Range:  unknown
Notes:  INT 61 is the default interrupt; the actual interrupt number can be
          obtained by calling INT 16/AH=FFh
        not all vendors include the Tseng TSR which supports these functions
SeeAlso: AX=0000h"OPTIMA",AX=0003h"OPTIMA",AX=0006h"OPTIMA"
SeeAlso: INT 16/AH=FFh"OPTIMA"

Format of Optima 1024 window parameters:
Offset  Size    Description     (Table 03429)
 00h    WORD    X start of zoom window
 02h    WORD    Y start of zoom window
 04h    WORD    X end of zoom window
 06h    WORD    Y end of zoom window
 08h    WORD    current zoom factor
 0Ah    WORD    zoom offset start X
 0Ch    WORD    zoom offset start Y
--------V-610006-----------------------------
INT 61 - OPTIMA 1024 VGA-Sync,ET-3000 chipset - SET ZOOM WINDOW
        AX = 0006h
        BX:CX -> zoom window description (see #03430)
Range:  unknown
Notes:  width of zoom window must be a multiple of the pixel replication (zoom)
          factor
        INT 61 is the default interrupt; the actual interrupt number can be
          obtained by calling INT 16/AH=FFh
        not all vendors include the Tseng TSR which supports these functions
SeeAlso: AX=0000h"OPTIMA",AX=0001h"OPTIMA",AX=0005h"OPTIMA",AX=0008h"OPTIMA"
SeeAlso: INT 16/AH=FFh"OPTIMA"

Format of Optima 1024 zoom window description:
Offset  Size    Description     (Table 03430)
 00h    WORD    X start of zoom window
 02h    WORD    Y start of zoom window
 04h    WORD    X end of zoom window
 06h    WORD    Y end of zoom window
--------N-610006-----------------------------
INT 61 - Banyan VINES - GET ADDRESS OF GLOBAL VARIABLE
        AX = 0006h
        BX = bits 14..0: request ID (see #03431)
             bit  15:    result destination flag (0 for ES:BX, 1 for AX:BX)
Return: AX = status
            0000h successful
            000Bh invalid request
        ES:BX -> internal variable (bit 15 of BX was not set)
        AX:BX -> internal variable (bit 15 of BX was set)
Note:   This service is handled by the redirector
SeeAlso: AX=0004h/SF=0013h,AX=0004h/SF=0014h

(Table 03431)
Values for request IDs:
Request Length  Description
 0000h     1    ???
 0001h    16    StreetTalk port
 0002h     4    StreetTalk session handle
 0003h     6    colors
 0004h    64    StreetTalk name of currently logged in user
 0005h     0    old clear text password (always returns error code 000Bh)
 0006h     0    default group (not applicable)
 0007h     1    message queue count
 0008h     1    message flag
 0009h    16    TalkPort
 000Ah     2    TalkPort socket
 000Bh    64    StreetTalk name of mail service
 000Ch     2    message timeout
 000Dh     2    next message place
 000Eh   246    message queue
 000Fh    14    system nonce
 0010h     2    failed login count
 0011h     1    new mail message received
 0012h     8    mail capabilities
 0013h     3    printer port diverted
 0014h    32    international location
 0015h    16    IPC port of drive Z:
 0016h  1024    pointer to current directory table
 0017h     2    maximum number of file volume mappings
 0018h    24    routine to call back for messages
 0019h     4    current virtual machine
 001Ah    20    DOS redirector message bell tones
 001Bh     2    various flags used for internal communication
 001Ch     0    OS/2 client configuration (always returns error code 000Bh)
 001Dh     8    redirector/IFS file version
 001Eh     0    reserved (always returns error code 000Bh)
 001Fh     4    address of VVINESD.386 dispatch
--------V-610007-----------------------------
INT 61 - OPTIMA 1024 VGA-Sync,ET-3000 chipset - QUERY APPLICATION KEY
        AX = 0007h
Return: AX = current state (0000h/0001h)
Desc:   returns the current toggle state of the application (END) key in
          specify mode. E.g. in the OPTIMA AutoCAD driver, 0 means AutoCAD
          calls INT 61/AX=0001h every time the crosshair cursor moves.
Notes:  In specify mode, the END key has been reserved for applications.
        INT 61 is the default interrupt; the actual interrupt number can be
          obtained by calling INT 16/AH=FFh
        not all vendors include the Tseng TSR which supports these functions
SeeAlso: AX=0000h"OPTIMA",AX=0001h"OPTIMA",AX=0004h"OPTIMA"
SeeAlso: INT 16/AH=FFh"OPTIMA",INT 7A/AX=0001h"AutoCAD"
--------N-610007BX0000-----------------------
INT 61 - Banyan VINES - RECONNECT TO STREETTALK
        AX = 0007h
        BX = 0000h
Return: AX = status (see #03432)
SeeAlso: AX=0007h/BX=0002h

(Table 03432)
Values for VINES function status:
 0000h  successful
 0001h  requested handler not installed or incompatible
 000Bh  service busy
 000Ch  invalid request ID
 03E9h  incorrect name syntax
 03EAh  organization name too long
 03EBh  group name too long
 03ECh  item name too long
 03EDh  StreetTalk name too long
 03F3h  organization not found
 03F4h  group not found
 03F5h  StreetTalk name not found
 03F8h  not a StreetTalk name
 0409h  modify access denied
 040Dh  appropriate StreetTalk name unavailable
 0411h  all matching names have been returned
 0412h  some groups unavailable, all available matches returned
--------N-610007BX0001-----------------------
INT 61 - Banyan VINES - GET MM PORT FOR A SERVICE
        AX = 0007h
        BX = 0001h
        DS:DX -> StreetTalk service name (64 bytes)
        DS:DI -> 16-byte buffer for IPC port (see #03328 at AX=0001h"Sosock")
Return: AX = status (see #03432)
Notes:  This function calls AX=0007/BX=0002h with the port count set to 1 and
          the port type set to 00h
SeeAlso: AX=0007h/BX=0002h,AX=0007h/BX=0004h,AX=0007h/BX=000Ah
--------N-610007BX0002-----------------------
INT 61 - Banyan VINES - GET PORTS FOR A SERVICE
        AX = 0007h
        BX = 0002h
        DS:DX -> StreetTalk service name
        DS:DI -> port record block (see #03433)
Return: AX = status (see #03432)
Note:   if the requested number of ports is greater than five, it will be reset
          to five
SeeAlso: AX=0007h/BX=0001h,AX=0007h/BX=0003h,AX=0007h/BX=0004h
SeeAlso: AX=0007h/BX=000Ah

Format of VINES port record block:
Offset  Size    Description     (Table 03433)
 00h    WORD    (call) number of 17-byte elements (01h-05h) to be filled
 02h    BYTE    (call) port type for first port
 03h 16 BYTEs   (ret) port (see #03328)
 13h    BYTE    (call) port type for second port
 14h 16 BYTEs   (ret) port (see #03328)
 24h    BYTE    (call) port type for third port
 25h 16 BYTEs   (ret) port (see #03328)
 35h    BYTE    (call) port type for fourth port
 36h 16 BYTEs   (ret) port (see #03328)
 46h    BYTE    (call) port type for fifth port
 47h 16 BYTEs   (ret) port (see #03328)
 57h    BYTE    reserved
SeeAlso: #03435
--------N-610007BX0003-----------------------
INT 61 - Banyan VINES - FIND A SERVICE
        AX = 0007h
        BX = 0003h
        DS:DX -> port control block (see #03434)
Return: AX = status (see AX=0007h/BX=0000h)
SeeAlso: AX=0007h/BX=0002h,AX=0007h/BX=0004h,AX=0007h/BX=0005h

Format of port control block:
Offset  Size    Description     (Table 03434)
 00h    WORD    ???
 02h    WORD    ???
 04h 16 BYTEs   IPC port (see #03328 at AX=0001h"Sosock")
 14h  5 WORDs   ???
SeeAlso: #03440
--------N-610007BX0004-----------------------
INT 61 - Banyan VINES - SET PORTS FOR A SERVICE
        AX = 0007h
        BX = 0004h
        DS:DX -> StreetTalk name of service (max 64 bytes)
        DS:DI -> port record block (see #03435)
Return: AX = status (see #03432)
SeeAlso: AX=0007h/BX=0002h,AX=0007h/BX=0003h,AX=0007h/BX=000Ah

Format of VINES port record block:
Offset  Size    Description     (Table 03435)
 00h    WORD    number of 17-byte elements
 02h    BYTE    port type for first port
 03h 16 BYTEs   first IPC port (see #03328)
 13h    BYTE    port type for second port
 14h 16 BYTEs   second IPC port (see #03328)
 24h    BYTE    port type for third port
 25h 16 BYTEs   third IPC port (see #03328)
 35h    BYTE    port type for fourth port
 36h 16 BYTEs   fourth IPC port (see #03328)
 46h    BYTE    port type for fifth port
 47h 16 BYTEs   fifth IPC port (see #03328)
 57h    BYTE    reserved
SeeAlso: #03433
--------N-610007BX0005-----------------------
INT 61 - Banyan VINES - GET USER NAME
        AX = 0007h
        BX = 0005h
        DS:DX -> 64-byte buffer for user's StreetTalk name
Return: AX = status (see also #03432)
            0000h successful
            0001h network software not installed or incompatible
Note:   if no user logged in, first byte of returned name will be 00h
SeeAlso: AX=0007h/BX=0007h
--------N-610007BX0006-----------------------
INT 61 - Banyan VINES - TRANSLATE ERROR INTO ASCII STRING
        AX = 0007h
        BX = 0006h
        SI = error code (>100)
        DS:DX -> 80-byte buffer for error text
Return: AX = status (see also #03432)
            0000h successful
            0001h network software not installed or incompatible
--------N-610007BX0007-----------------------
INT 61 - Banyan VINES - VERIFY EXISTENCE OF NAME AND RETURN CANONICAL FORM
        AX = 0007h
        BX = 0007h
        DS:DX -> NiceName block (see #03436)
Return: AX = status (see #03432)
SeeAlso: AX=0007h/BX=0005h,AX=0007h/BX=0008h

Format of VINES NiceName block:
Offset  Size    Description     (Table 03436)
 00h    WORD    type of name
                0064h (100) organization
                00C8h (200) group
                012Ch (300) item
 02h    WORD    pointer to ASCIZ input name
 04h    WORD    pointer to 64-byte buffer for output name
SeeAlso: #03437
--------N-610007BX0008-----------------------
INT 61 - Banyan VINES - ENUMERATE StreetTalk NAMES
        AX = 0007h
        BX = 0008h
        DS:DX -> enumerate block (see #03437)
Return: AX = status (see also #03432)
            0000h successful
            0411h all matching names have been returned
            0412h some groups unavailable, all available matches returned
Note:   each program using this call should continue until a nonzero status
          is returned; otherwise, some resources will not be freed for several
          hours
SeeAlso: AX=0007h/BX=0005h,AX=0007h/BX=0007h,AX=0007h/BX=0009h

Format of VINES enumerate block:
Offset  Size    Description     (Table 03437)
 00h    WORD    return code
 02h    WORD    pointer to pattern string
 04h    WORD    enumerate type
                0064h (100) organization
                00C8h (200) group
                012Ch (300) item
 06h    WORD    enumerate class
                0000h unspecified (return all matching items)
                0001h user names
                0002h service names
                0003h list names
                0004h nicknames
 08h    WORD    pointer to category criteria block (see #03438) or 0
 0Ah    WORD    pointer to array of 64-byte returned names
 0Ch    WORD    number of names returned
 0Eh  6 BYTEs   reserved for subsequent enumerated calls (set to zeros on first
                  call)
SeeAlso: #03436

Format of category criteria block:
Offset  Size    Description     (Table 03438)
 00h    WORD    exclude flag
                0000h return only items with the specified categories
                0001h return all items except those with the given categories
 02h    WORD    number of categories (max 5, 0000h = match all categories)
 04h    WORD    category 1 value (see #03439)
 06h    WORD    category 2 value
 08h    WORD    category 3 value
 0Ah    WORD    category 4 value
 0Ch    WORD    category 5 value
SeeAlso: #03437

(Table 03439)
Values for common VINES service categories:
 0001h  server service
 0002h  file service
 0003h  print service
 0004h  mail service
 0005h  StreetTalk
 0006h  time service
 0007h  FTP service
 0008h  semaphore service
 0009h  3270/SNA service
 000Ah  terminal emulation service
 000Bh  asynchronous terminal service
 000Ch  NETBIOS service
 000Dh  PC-based service
 000Eh  BSC service
 000Fh  APPC service
 0010h  NM service
 0011h  VS service
 0012h  POP service
 0013h  AFP service
 0014h  VCS service
 0015h  EMS service
 0016h  LN service
 0017h  BS service
 0023h  RIPL service
 0064h  ADM service
SeeAlso: #03438
--------N-610007BX0009-----------------------
INT 61 - Banyan VINES - TRANSLATE ERROR INTO ASCII STRING (SELECTED PORT)
        AX = 0007h
        BX = 0009h
        SI = error code
        DS:DX -> 80-byte buffer for error text
        DS:DI -> IPC port (16 bytes; see AX=0001h#"Sosock" for port format)
Return: AX = status (see AX=0007h/BX=0000h)
Note:   Same as AX=0007h/BX=0006h, except IPC port is specified explicitly
SeeAlso: AX=0007h/BX=0006h
--------N-610007BX000A-----------------------
INT 61 - Banyan VINES - internal, OS/2 only - GET MANY PORTS FOR SERVICE
        AX = 0007h
        BX = 000Ah
        DS:DX -> port control block (see #03440)
Return: AX = status (see AX=0007h/BX=0000h)
Note:   This function cannot be called from applications, as the DS register
          is checked against the redirector data segment address (status code
          0001h will be returned if DS doesn't match)
SeeAlso: AX=0007h/BX=0001h,AX=0007h/BX=0002h,AX=0007h/BX=0004h

Format of port control block:
Offset  Size    Description     (Table 03440)
 00h    WORD    ???
 02h    WORD    ???
 04h 16 BYTEs   IPC port (see #03328 at AX=0001h"Sosock")
 14h 14 WORDs   ???
SeeAlso: #03434
--------V-610008-----------------------------
INT 61 - OPTIMA 1024 VGA-Sync,ET-3000 chipset - SET ZOOM OFFSET
        AX = 0008h
        BX = X start of zoom offset
        CX = Y start of zoom offset
Desc:   specifies the first byte of video memory to appear in the zoom window
Range:  unknown
Notes:  INT 61 is the default interrupt; the actual interrupt number can be
          obtained by calling INT 16/AH=FFh
        not all vendors include the Tseng TSR which supports these functions
SeeAlso: AX=0000h"OPTIMA",AX=0006h"OPTIMA",INT 16/AH=FFh"OPTIMA"
--------N-610008BX0000-----------------------
INT 61 - Banyan VINES - TALKPORT SERVICE - GET HANDLER ADDRESS
        AX = 0008h
        BX = 0000h
Return: AX = status
            0000h successful
        ES:DX = far pointer to handler
Desc:   The TalkPort is a facility to display event messages (e.g. mail
          received, printing on a local printer, ...) on the screen
Note:   This service is handled by the redirector
SeeAlso: AX=0008h/BX=0001h,AX=0008h/BX=0002h
--------N-610008BX0001-----------------------
INT 61 - Banyan VINES - TALKPORT SERVICE - SET HANDLER ADDRESS
        AX = 0008h
        BX = 0001h
        ES:DX -> new handler
Return: AX = status
            0000h successful
SeeAlso: AX=0008h/BX=0000h
--------N-610008BX0002-----------------------
INT 61 - Banyan VINES - TALKPORT SERVICE - POST MESSAGE ON LOCAL DISPLAY
        AX = 0008h
        BX = 0002h
        CX = message display flags (see #03441)
        DS:DX -> ASCIZ string to display (only first 80 chars used)
Return: AX = status
            0000h successful
            000Bh message display function currently busy
            000Ch message queue full
Notes:  queues up to three messages to be displayed on the bottom line
        This service is handled by the redirector
        In a DOS session, TalkPort messages are displayed on display line 25;
          in a Windows session, TalkPort messages are displayed in dialog boxes
SeeAlso: AX=0008h/BX=0000h,AX=0008h/BX=0003h

Bitfields for VINES message display flags:
Bit(s)  Description     (Table 03441)
 0      message will remain on screen until user presses ^X
 1      ring bell after displaying message
 2      blink
--------N-610008BX0003-----------------------
INT 61 - Banyan VINES - TALKPORT SERVICE - INTERCEPT VINES 25th-LINE MESSAGES
        AX = 0008h
        BX = 0003h
        DS:DX -> request block (see #03442)
Return: AX = status
            0000h successful
            0001h network software not installed or incompatible
Notes:  message handler should not call BIOS or DOS functions, and should
          either call next handler or simply return
        to stop intercepting messages, set prev and next request blocks to
          point at each other
SeeAlso: AX=0008h/BX=0002h

Format of VINES request block for 25-th line messages:
Offset  Size    Description     (Table 03442)
 00h    DWORD   pointer to user-written message handler
 04h    DWORD   pointer to next request block (filled in by VINES)
 08h    DWORD   pointer to previous request block (filled in by VINES)
 0Ch    DWORD   pointer to message storage area (filled by VINES) (see #03443)

Format of message storage area:
Offset  Size    Description     (Table 03443)
 00h 16 BYTEs   IPC port of message sender (see #03328)
 10h    BYTE    message flags
 11h    WORD    reserved
 13h    BYTE    length of message
 14h 80 BYTEs   message text
SeeAlso: #03442
--------N-610009-----------------------------
INT 61 - Banyan VINES - NETBIOS CLIENT SERVICE
        AX = 0009h
        other parameters, if any, unknown
--------N-61000A-----------------------------
INT 61 - Banyan VINES - SECONDARY 3270 INTERFACE
        AX = 000Ah
Note:   either 3270/SNA or 3270/BSC interface will use AX=000Ah, depending on
          which is loaded second.  The first interface loaded will use AX=0002h
SeeAlso: INT 61/AX=0002h
--------N-61000B-----------------------------
INT 61 - Banyan VINES - SEMAPHORE SERVICE
        AX = 000Bh
        other parameters, if any, unknown
--------N-61000C-----------------------------
INT 61 - Banyan VINES - 3270 KEYBOARD HANDLER
        AX = 000Ch
        other parameters, if any, unknown
--------N-61000D-----------------------------
INT 61 - Banyan VINES - T3270 SERVICE FUNCTION
        AX = 000Dh
        other parameters, if any, unknown
--------N-61000E-----------------------------
INT 61 - Banyan VINES - ENHANCED 3270 SERVICE
        AX = 000Eh
        other parameters, if any, unknown
--------N-61000F-----------------------------
INT 61 - Banyan VINES - VINES SOCKET API (FAR DATA)
        AX = 000Fh
        CX:BX -> request block (see #03444)
        DX = application's data segment (should be = CX)
        ES = DS
Return: AX = status
            0000h successful
            0099h invalid operation
            00A5h resource not available
Desc:   StreetTalk access with session handles
Notes:  This service is handled by the adapter driver
        The request dispatch table contains dummy entries for subfunctions
          06h, 0Dh, 0Eh, 0Fh, 10h, and 11h, which always return error 0099h
          (invalid operation) in the request block's result buffer
        This interface does the same as the corresponding AX=0001h interface,
          but with a slightly modified request block structure (i.e it allows
          FAR parameter block pointers) and without expecting DS=0001h
        Some adapter drivers (e.g. the NDIS2 token ring driver NDTOKBAN for
          VINES 5.53) ignore the value in CX and use the value from DX instead
SeeAlso: AX=0001h/SF=0001h,AX=000Fh/SF=0001h

Format of VINES Socket request block:
Offset  Size    Description     (Table 03444)
 00h    WORD    subfunction number (01h-16h)
 02h    WORD    magic number (FEFEh)
 04h    WORD    buffer for return code (set to 0 before calling)
 06h    WORD    reserved (will be set to client DS)
 08h    WORD    reserved (obviously not used; set to 0 before calling)
 0Ah    DWORD   far pointer to parameter block
 0Eh    WORD    StreetTalk handle
SeeAlso: #03324 at INT 61/AX=0001h
--------N-61000FSF0001-----------------------
INT 61 - Banyan VINES - OPEN SOCKET
        AX = 000Fh subfn 0001h
        CX:BX -> request block (see #03445)
        DX = application's data segment (should be = CX)
        ES = DS
Return: AX = status
            0000h successful
            00A5h resource not available
Desc:   Opens a socket and returns a socket handle

Format of request block:
Offset  Size    Description     (Table 03445)
 00h    WORD    0001h
 02h    WORD    magic number (FEFEh)
 04h    WORD    buffer for return code (set to 0 before calling)
 06h    WORD    reserved (will be set to client DS)
 08h    WORD    reserved (obviously not used; set to 0 before calling)
 0Ah    DWORD   far pointer to parameter block (see #03446)
 0Eh    WORD    process handle (see AX=000Fh/SF=0008h)

Format of parameter block:
Offset  Size    Description     (Table 03446)
 00h    WORD    reserved
 02h    WORD    address family (0003h = VINES)
 04h    WORD    socket type (0001h = IPC, 0002h = SPP)
 06h    WORD    protocol number (FFFFh = default protocol)
 08h    WORD    reserved
 0Ah    WORD    local port number (0 = transient, 1..1FFh = well-known port)
 0Ch    DWORD   far pointer to socket handle buffer (2 bytes)
 10h    DWORD   far pointer to IPC port buffer (16 bytes)
SeeAlso: #03445
--------N-61000FSF0002-----------------------
INT 61 - Banyan VINES - SEND MESSAGE ON A SOCKET
        AX = 000Fh subfn 0002h
        CX:BX -> request block (see #03447)
        DX = application's data segment (should be = CX)
        ES = DS
Return: AX = status
            0000h successful
            00A5h resource not available
Desc:   send data to a socket identified by its socket handle

Format of request block:
Offset  Size    Description     (Table 03447)
 00h    WORD    0002h
 02h    WORD    magic number (FEFEh)
 04h    WORD    buffer for return code (set to 0 before calling)
 06h    WORD    reserved (will be set to client DS)
 08h    WORD    reserved (obviously not used; set to 0 before calling)
 0Ah    DWORD   far pointer to parameter block (see #03448)
 0Eh    WORD    process handle (see AX=000Fh/SF=0008h)

Format of parameter block:
Offset  Size    Description     (Table 03448)
 00h    WORD    buffer for estimated communication cost in 220 msec ticks
 02h    WORD    buffer for return code (set to 0 before calling)
 04h    WORD    socket handle
 06h    DWORD   far pointer to IPC/SPP message buffer
 0Ah    WORD    length of IPC/SPP message buffer
 0Ch    WORD    option flags
                bit 0: asynchronous communication
                bit 1: reliable message
                bit 3: end of message
                bit 4: vectored I/O
 0Eh 16 BYTEs   socket address (IPC port of source)
 1Eh    WORD    not used (set to 0 before calling)
 20h    WORD    SPP connection id (0 for IPC messages)
 22h    WORD    request type (1 = data, 2 = connect SPP, 3 = disconnect SPP)
SeeAlso: #03447
--------N-61000FSF0004-----------------------
INT 61 - Banyan VINES - CLOSE SOCKET
        AX = 000Fh subfn 0004h
        CX:BX -> request block (see #03449)
        DX = application's data segment (should be = CX)
        ES = DS
Return: AX = status
            0000h successful
            00A5h resource not available
Desc:   Closes a socket identified by its socket handle

Format of request block:
Offset  Size    Description     (Table 03449)
 00h    WORD    0004h
 02h    WORD    magic number (FEFEh)
 04h    WORD    buffer for return code (set to 0 before calling)
 06h    WORD    reserved (will be set to client DS)
 08h    WORD    reserved (obviously not used; set to 0 before calling)
 0Ah    DWORD   far pointer to socket handle (2 bytes)
 0Eh    WORD    process handle (see AX=000Fh/SF=0008h)
--------N-61000FSF0008-----------------------
INT 61 - Banyan VINES - GET PROCESS HANDLE
        AX = 000Fh subfn 0008h
        CX:BX -> request block (see #03450)
        DX = application's data segment (should be = CX)
        ES = DS
Return: AX = status
            0000h successful
            00A5h resource not available
Desc:   Returns a process handle to be used in other request blocks
Notes:  This function is a prerequisite to all AX=000Fh subfunctions which
          expect a process handle in the request block
        Although subsequent calls from the same application return different
          process handles, there seem to be no restrictions on how many times
          an application may call this function (in fact, the code in the VINES
          toolkit library always calls it before issueing other AX=000Fh calls)

Format of request block:
Offset  Size    Description     (Table 03450)
 00h    WORD    0008h
 02h    WORD    magic number (FEFEh)
 04h    WORD    buffer for return code (set to 0 before calling)
 06h    WORD    reserved
 08h    WORD    reserved (obviously not used; set to 0 before calling)
 0Ah    DWORD   process type (1 = transient, 2 = resident; destroyed on exit)
 0Eh    WORD    buffer for process handle
--------N-610010-----------------------------
INT 61 - Banyan VINES - INTERFACE TO NBNS
        AX = 0010h
        other parameters, if any, unknown
--------N-6101-------------------------------
INT 61 - Banyan VINES - CHECK SERVICE
        AH = 01h
        AL = service ID (see #03451)
Return: AX = status
            0000h installed
            0001h not installed
            0002h invalid ID
            0003h invalid function
Note:   Only the offset part of the service pointer is checked for a nonzero
          value
SeeAlso: AH=00h,AH=02h"VINES",AH=03h"VINES"

(Table 03451)
Values for VINES service ID:
 01h    communications
 02h    primary 3270 emulation
 03h    async terminal emulation
 04h    file deflection
 05h    print service control
 06h    get address of something
 07h    StreetTalk access service
 08h    environment
 09h    NETBIOS client service
 0Ah    secondary 3270 emulation
 0Bh    semaphore service
 0Ch    3270 emulation active status
 0Dh    T3270 keyboard interrupt simulator
 0Eh    enhanced 3270 service
 0Fh    comm Windows entry point
 10h    interface to NBNS
--------N-6101--BX0000-----------------------
INT 61 u - PC/TCP kernel v2.1+ - "net_config" - CONFIGURE RUNNING KERNEL
        AH = 01h
        BX = 0000h
        DH = tag number
        DL = device number
        DS:SI -> buffer to send to kernel
        ES:DI -> integer containing size of buffer
Return: CF clear if successful
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Range:  INT 20 to INT E0, selected by configuration
Notes:  there are a large number of tags available; the items returned
          all refer to local kernel configuration, and are not needed in
          normal use.
        this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=02h"PC/TCP"
--------N-6102-------------------------------
INT 61 - Banyan VINES - GET REVISION NUMBER
        AH = 02h
        DS:DX -> 2-byte buffer for result
Return: AX = 0000h installed
            DS:DX buffer contains revision number as
                10000d * major_ver + 100d * minor_ver + patch_revision
SeeAlso: AH=01h"VINES",AH=04h"VINES",AH=07h"VINES"
--------N-6102--BX0000-----------------------
INT 61 u - PC/TCP kernel v2.1+ - "get_kernel_info" - GET MISCELLAN LOCAL INFO
        AH = 02h
        BX = 0000h
        DH = tag number
        DL = device number
        DS:SI -> buffer for result (up to 48 bytes for version <= 2.2)
        ES:DI -> integer containing size of buffer
Return: CF clear if successful
            Data loaded into specified buffer, and size value altered
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Range:  INT 20 to INT E0, selected by configuration
Notes:  there are a large number of tags available; the items returned
          all refer to local kernel configuration, and are not needed in
          normal use.
        this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=01h"PC/TCP"
--------N-6103-------------------------------
INT 61 - Banyan VINES - INSTALL SERVICE HANDLER
        AH = 03h
        AL = service ID (see #03451)
        DS:DX -> new service handler
Return: AX = 0000h successful
SeeAlso: AH=00h,AH=01h"VINES",AH=02h"VINES",AH=05h"VINES"
--------N-6104-------------------------------
INT 61 - Banyan VINES - CHECK VINES REVISION NUMBER IN RANGE
        AH = 04h
        DS:DX -> 2-byte buffer containing the VINES revision number
            DS:DX buffer contains revision number as
                10000d * major_ver + 100d * minor_ver + patch_revision
Return: AX = status
            0000h valid version
            0004h out of range
Note:   For Revision 5.53, the valid range is 4.10(0) to 6.19(99)
SeeAlso: AH=02h"VINES",AH=07h"VINES",AH=08h"VINES"
--------N-6105-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "get_addr" - GET INTERNET ADDRESS OF NET DESCR
        AH = 05h
        BX = network descriptor
Return: CF clear if successful
            DX:AX = Internet address of ND
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
InstallCheck:   test for the signature "TCPTSR" three bytes beyond the start
          of the interrupt handler
Range:  INT 20 to INT E0, selected by configuration
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=16h"PC/TCP"
SeeAlso: INT 63/AH=25h"BW-TCP"
--------N-6105-------------------------------
INT 61 - Banyan VINES - READ PCCONFIG BYTES
        AH = 05h
        CX = number of bytes to copy
            (max. 0175h for VINES 4.00, max. 017Fh for VINES 4.10+)
        SI = offset of area to be copied (see #03452,#03453)
Return: AX = status
            0000h successful
            0004h out of range
Notes:  The PCCONFIG area is located in the code segment of the BANV handler
        To find out which PCCONFIG structure applies, call this function first
          with CX=0006h to get the VINES revision number
SeeAlso: AH=02h"VINES",AH=04h"VINES",AH=06h"VINES",AH=0Bh"VINES"

Format of PCCONFIG area (VINES 4.00):
Offset  Size    Description     (Table 03452)
 00h  6 BYTEs   VINES revision (ASCII, zero-padded)
 06h  2 BYTEs   NEWREV-number (ASCII, two digits)
 08h    WORD    hardware interrupt level
 0Ah    WORD    DMA channel
 0Ch    WORD    I/O address
 0Eh    DWORD   adapter ROM address (linear)
 12h    DWORD   adapter RAM address (linear)
 16h    WORD    BANV interrupt
 18h 32 BYTEs   default login group #1
 38h 32 BYTEs   default login group #2
 58h 32 BYTEs   default login group #3
 78h    WORD    semaphore locking support flag
 7Ah    WORD    extended StreetTalk flag
 7Ch    WORD    maximum number of file volumes
 7Eh    WORD    NetBIOS flag
 80h 60 BYTEs   default network adapter
 BCh 60 BYTEs   default communications driver
 F8h    WORD    maximum number of SPP connections
 FAh    WORD    maximum number of open sockets
 FCh    WORD    communications buffer size (10..60 KB)
 FEh 20 BYTEs   location directory on drive Z:
112h 33 BYTEs   auxiliary configuration area #1 (see #03454)
133h 33 BYTEs   auxiliary configuration area #2
154h 33 BYTEs   auxiliary configuration area #3
SeeAlso: #03453

Format of PCCONFIG area (VINES 4.10+):
Offset  Size    Description     (Table 03453)
 00h  6 BYTEs   VINES revision (ASCII, zero-padded)
 06h  2 BYTEs   NEWREV-number (ASCII, two digits)
 08h    WORD    hardware interrupt level
 0Ah    WORD    DMA channel
 0Ch    WORD    I/O address
 0Eh    DWORD   adapter ROM address (linear)
 12h    DWORD   adapter RAM address (linear)
 16h    WORD    BANV interrupt
 18h 32 BYTEs   default login group #1
 38h 32 BYTEs   default login group #2
 58h 32 BYTEs   default login group #3
 78h    WORD    semaphore locking support flag
 7Ah    WORD    extended StreetTalk flag
 7Ch    WORD    named pipes support flag
 7Eh    WORD    maximum number of file volumes
 80h    WORD    NetBIOS flag
 82h 60 BYTEs   default network adapter
 BEh 60 BYTEs   default communications driver
 FAh    WORD    maximum number of SPP connections
 FCh    WORD    maximum number of open sockets
 FEh    WORD    communications buffer size (10..60 KB)
100h    WORD    number of mailslots
102h    WORD    maximum number of open files
104h    WORD    maximum number of NetBIOS sessions
106h    WORD    maximum number of NetBIOS commands
108h 20 BYTEs   location directory on drive Z:
11Ch 33 BYTEs   auxiliary configuration area #1 (see #03454)
13Dh 33 BYTEs   auxiliary configuration area #2
15Eh 33 BYTEs   auxiliary configuration area #3

Format of auxiliary configuration area:
Offset  Size    Description     (Table 03454)
 00h 16 BYTEs   item name (no zero terminator if length = 16)
 10h    BYTE    item value type (1=text, else numeric)
 11h 16 BYTEs   item value (string if type 1, else DWORD)
SeeAlso: #03452,#03453
--------N-6106-------------------------------
INT 61 - PC/TCP kernel v2.05 - "net_info" - GET INTERFACE STATISTICS
        AH = 06h
        BX = network descriptor (must be allocated and open)
        DS:SI -> 38-byte buffer for interface statistics (see #03455)
Return: CF clear if successful
            buffer filled
        CF set on error
            AX = error code (see #03319)
Desc:   returns the statistics relevant to the particular network interface
           used by the specified network descriptor
Range:  INT 20 to INT E0, selected by configuration
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=05h"PC/TCP"

Format of PC/TCP interface statistics:
Offset  Size    Description     (Table 03455)
 00h    WORD    interface class (e.g. 802.3)
 02h    WORD    type (manufacturer) of interface
 04h    WORD    interface number
 06h    DWORD   (big-endian) IP address of interface
 0Ah    DWORD   subnet mask
 0Eh    WORD    0001h if interface is up
 10h    DWORD   total packets received
 14h    DWORD   total packets sent
 18h    DWORD   receive errors
 1Ch    DWORD   send errors
 20h    WORD    length of local net address (e.g. 0006h for Ethernet)
 22h    DWORD   pointer to local net address
--------N-6106-------------------------------
INT 61 - Banyan VINES - GET PCCONFIG BASE ADDRESS
        AH = 06h
        DS:DX -> 4-byte buffer for far pointer to PCCONFIG area
Return: AX = 0000h successful
Note:   The PCCONFIG area is located in the code segment of the BANV handler
SeeAlso: AH=05h"VINES",AH=0Bh"VINES"
--------N-6107-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_globalize" - MAKE NET DESCRIPTOR GLOBAL
        AH = 07h
        BX = local network descriptor
Return: CF clear if successful
            AX = global network descriptor
        CF set on error
            AX = error code (see #03319)
Notes:  the new network descriptor can be accessed from all processes and is
          independent of DOS
        this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=08h"PC/TCP"
SeeAlso: INT 61/AH=29h
--------N-6107-------------------------------
INT 61 - Banyan VINES - GET VINES REVISION NUMBER (LONG)
        AH = 07h
        DS:DX -> 4-byte buffer for result
Return: AX = 0000h successful
            DS:DX buffer contains revision number as
                10000d * major_ver + 100d * minor_ver + patch_revision
SeeAlso: AH=02h"VINES",AH=04h"VINES",AH=08h"VINES"
--------b-6107-------------------------------
INT 61 - Atari Portfolio - FORMAT CREDIT CARD MEMORY
        AH = 07h
        AL = drive number (00h = A:,01h = B:)
Return: CF clear if successful
        CF set on error
            AH = error code (see #00234 at INT 13/AH=01h)
Note:   do not use this function to format the internal disk (drive number 02h)
SeeAlso: AH=00h"Portfolio",AH=08h"Portfolio",AH=09h"Portfolio"
--------N-6108-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_release" - CLOSE A NETWORK DESCRIPTOR
        AH = 08h
        BX = network descriptor
Return: CF clear if successful
            AX = 0000h (BWPCTCP shim)
        CF set on error
            AX = error code (see #03319)
Range:  INT 20 to INT E0, selected by configuration
Note:   the descriptor will be closed and resources released.  If a stream
          descriptor, the protocol (FIN etc) is completed unless the
          non-blocking option has been set.
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=09h"PC/TCP"
SeeAlso: INT 63/AH=0Eh"BW-TCP"
--------N-6108-------------------------------
INT 61 - Banyan VINES - CHECK VINES REVISION NUMBER IN RANGE (LONG)
        AH = 08h
        DS:DX -> 4-byte buffer containing the VINES revision number
            DS:DX buffer contains revision number as
                10000d * major_ver + 100d * minor_ver + patch_revision
Return: AX = status
            0000h valid version
            0004h out of range
Note:   For Revision 5.53, the valid range is 4.10(0) to 6.19(99)
SeeAlso: AH=04h"VINES",AH=07h"VINES"
--------b-6108-------------------------------
INT 61 - Atari Portfolio - GET SIZE OF INTERNAL DISK
        AH = 08h
Return: AX = segment address of RAMdisk
        BX = size in KB
SeeAlso: AH=00h"Portfolio",AH=07h"Portfolio",AH=09h"Portfolio"
--------N-6109-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_releaseall" - CLOSE ALL NON-GLOBAL DESCRS
        AH = 09h
Return: CF clear
Range:  INT 20 to INT E0, selected by configuration
Notes:  this call performs function 08h on every non-global network descriptor.
          Global descriptors must be released individually.
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=08h"PC/TCP"
SeeAlso: INT 63/AH=0Eh"BW-TCP"
--------N-6109-------------------------------
INT 61 - Banyan VINES - GET VALUE OF AN OS/2 BACKEND VARIABLE
        AH = 09h
        other parameters, if any, unknown
SeeAlso: AH=0Ah"VINES"
--------b-6109-------------------------------
INT 61 - Atari Portfolio - FORMAT INTERNAL DISK
        AH = 09h
        BX = desired size of disk in KB
Return: CF clear if successful
        CF set on error
            BX = maximum possible size in KB
Desc:   resize and erase the internal RAMdisk, then reboot the system
SeeAlso: AH=00h"Portfolio",AH=07h"Portfolio",AH=08h"Portfolio"
SeeAlso: AH=0Bh"Portfolio"
--------N-610A-------------------------------
INT 61 - PC/TCP kernel v2.05 - "net_send" - ???
        AH = 0Ah
        ???
Return: ???
Notes:  this function is described as "unused" in the v2.05 and v2.2
          documentation
        this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
SeeAlso: AH=0Bh
--------N-610A-------------------------------
INT 61 - Banyan VINES - SET VALUE OF AN OS/2 BACKEND VARIABLE
        AH = 0Ah
        other parameters, if any, unknown
SeeAlso: AH=09h"VINES"
--------N-610B-------------------------------
INT 61 - PC/TCP kernel v2.05 - "net_sendto" - ???
        AH = 0Bh
        ???
Return: ???
Range:  INT 20 to INT E0, selected by configuration
Notes:  this function is described as "unused" in the v2.05 and v2.2
          documentation
        this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
SeeAlso: AH=0Ah
--------N-610B-------------------------------
INT 61 - Banyan VINES - SET PCCONFIG IN BACKEND
        AH = 0Bh
        other parameters, if any, unknown
SeeAlso: AH=05h"VINES",AH=06h"VINES"
--------b-610B-------------------------------
INT 61 - Atari Portfolio - DETERMINE CCM VALIDITY
        AH = 0Bh
        AL = drive number (00h = A:,01h = B:)
Return: CF clear if successful (card present and correct)
        CF set on error
            AH = error code (see #00234 at INT 13/AH=01h)
SeeAlso: AH=00h"Portfolio",AH=07h"Portfolio",AH=0Dh"Portfolio"
--------N-610C-------------------------------
INT 61 u - PC/TCP kernel v2.05+ - "net_stat" - GET CONNECTION STATISTICS
        AH = 0Ch
        BX = network descriptor or one of the following:
            FFFCh for kernel ICMP statistics (see #03459)
            FFFDh for kernel UDP statistics (see #03458)
            FFFEh for kernel IP statistics (see #03457)
            FFFFh for kernel TCP statistics (see #03456)
        DS:DX -> 64-byte buffer
Return: CF clear if successful
            buffer filled
        CF set on error
            AX = error code (see #03319)
Notes:  the fields filled in for a network descriptor depend on the protocol
          family used by that descriptor's connection
        this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP"

Format of PC/TCP kernel TCP statistics:
Offset  Size    Description     (Table 03456)
 00h 16 BYTEs   unused
 10h    DWORD   bytes sent
 14h    DWORD   bytes received
 18h  8 BYTEs   unused
 20h    DWORD   packets sent
 24h    DWORD   packets received
 28h    DWORD   bad checksums
 2Ch    DWORD   count of window ignored by remote
 30h    DWORD   timeouts
 34h    DWORD   resets
 38h    DWORD   duplicate packets
 3Ch    DWORD   retransmits
SeeAlso: #03457,#03458,#03459

Format of PC/TCP kernel IP statistics:
Offset  Size    Description     (Table 03457)
 00h  8 BYTEs   unused
 08h    DWORD   invalid IP header length errors
 0Ch    DWORD   protocol errors (unwanted packets)
 10h    DWORD   duplicate fragments received
 14h    DWORD   bad fragments received
 18h    DWORD   security errors
 1Ch    DWORD   count of bad IP addresses received
 20h    DWORD   packets sent
 24h    DWORD   packets received
 28h    DWORD   bad checksums received
 2Ch    DWORD   total IP protocol errors
 30h    DWORD   fragmentation errors
 34h    DWORD   IP packets discarded + bad security + bad fragments
 38h    DWORD   fragments received
 3Ch  4 BYTEs   unused
SeeAlso: #03456,#03458,#03459

Format of PC/TCP kernel UDP statistics:
Offset  Size    Description     (Table 03458)
 00h 28 BYTEs   unused
 1Ch    DWORD   packets dropped for lack of buffers
 20h    DWORD   packets sent
 24h    DWORD   packets received
 28h    DWORD   bad checksums
 2Ch    DWORD   port not listening errors
 30h  4 BYTEs   unused
 34h    DWORD   truncated receives
 38h  8 BYTEs   unused
SeeAlso: #03456,#03457,#03459

Format of PC/TCP kernel ICMP statistics:
Offset  Size    Description     (Table 03459)
 00h    DWORD   "TimeEx" sent
 04h    DWORD   "TimeEx" received
 08h    DWORD   "ParamProb" sent
 0Ch    DWORD   "ParamProb" received
 10h    DWORD   redirects received
 14h    DWORD   source quenches received
 18h    DWORD   ICMP Echo Requests ("ping") sent
 1Ch    DWORD   ICMP Echo Requests received
 20h    DWORD   packets sent
 24h    DWORD   packets received
 28h    DWORD   bad packets received
 2Ch    DWORD   "DestUn" received
 30h    DWORD   packet send errors
 34h    DWORD   "DestUn" sent
 38h    DWORD   ICMP Echo replies received
 3Ch    DWORD   ICMP Echo replies sent
SeeAlso: #03456,#03457,#03458
--------N-610D-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "is_netnd" - CHECK IF NETWORK DESCRIPTOR VALID
        AH = 0Dh
        BX = possible network descriptor
Return: CF clear if valid
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=08h"PC/TCP"
SeeAlso: INT 61/AH=22h
--------b-610D-------------------------------
INT 61 - Atari Portfolio - GET SCREEN SIZE
        AH = 0Dh
Return: AX = physical screen size (AH=rows, AL=columns)
        DX = logical screen size (DH=rows, DL=columns)
SeeAlso: AH=00h"Portfolio",AH=0Bh"Portfolio",AH=0Eh"Portfolio"
--------N-610E-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_select" - DETECT READINESS OF NETWORK
        AH = 0Eh
        BX = maximum value of network descriptor for which to return info
        DS:DX -> 32-bit (max) array of bit flags for read readiness
        ES:DI -> 32-bit (max) array of bit flags for write readiness
Return: CF clear
InstallCheck:   test for the signature "TCPTSR" three bytes beyond the start
          of the interrupt handler
Range:  INT 20 to INT E0, selected by configuration
Notes:  bits in the DS:DX buffer are set if the corresponding network
          descriptor may be read without blocking; bits in the ES:DI buffer
          are set if the corresponding network descriptor may be written
          without blocking.  This implies that the network descriptor has
          opened correctly and the protocol initialized.
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP"
--------b-610E-------------------------------
INT 61 - Atari Portfolio - GET/SET SCREEN MODE
        AH = 0Eh
        AL = function
            00h get mode
            01h set mode
                DL = new mode (see #03460)
Return: DL = current/old mode
Note:   if changing the mode places the cursor position or virtual screen
          origin outside the displayed area, the screen origin will be reset
          to (0,0), the screen cleared, and the cursor position set to (0,0)
SeeAlso: AH=00h"Portfolio",AH=0Dh"Portfolio",AH=0Fh"Portfolio",INT 10/AH=00h

Bitfields for Atari Portfolio screen mode:
Bit(s)  Description     (Table 03460)
 0      40x8 mode instead of 80x25
 1      tracked mode
 7      graphics
Note:   the above bits are mutually exclusive
--------N-610F-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "get_netversion" - GET SOFTWARE VERSION
        AH = 0Fh
Return: CF clear
        AX = version (AH = major, AL = minor)
        BX = patch level
Notes:  patch levels are no longer used starting with version 2.10; instead,
          the minor version level is incremented.
        Beame&Whiteside's BWPCTCP v3.0a shim reports version 2.05, but does not
          set BX
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP"
--------b-610F-------------------------------
INT 61 - Atari Portfolio - GET/SET CURSOR MODE
        AH = 0Fh
        AL = function
            00h get mode
            01h set mode
                BL = new cursor mode
                        00h cursor off
                        01h underline
                        02h block
            02h force mode (set size to reflect NumLock state)
Return: BL = current/old cursor mode
SeeAlso: AH=00h"Portfolio",AH=0Eh"Portfolio",AH=10h"Portfolio",INT 10/AH=01h
--------N-6110-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_shutdown" - UNINSTALL
        AH = 10h
Return: CF clear if successful
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Range:  INT 20 to INT E0, selected by configuration
Note:   this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP"
--------b-6110-------------------------------
INT 61 - Atari Portfolio - GET/SET VIRTUAL SCREEN POSITION
        AH = 10h
        AL = function
            00h get position
                Return: DH,DL = current row,column
            01h set position
                DH = row
                DL = column
Desc:   get or specify the upper-left corner of the 40x8 window into the
          logical screen
SeeAlso: AH=00h"Portfolio",AH=0Eh"Portfolio",AH=0Fh"Portfolio"
SeeAlso: AH=11h"Portfolio"
--------N-6111-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "disable_async" - DISABLE ASYNCHRONOUS HANDLERS
        AH = 11h
Return: CF clear
        AX = previous state
            0000h async calls were already disabled
            else  async calls were enabled
SeeAlso: INT 61"FTP Software",INT 61/AH=12h
--------b-6111-------------------------------
INT 61 - Atari Portfolio - MOVE VIRTUAL SCREEN ORIGIN
        AH = 11h
        AL = number of lines to move
        DL = direction of move (1=up, 2=down, 3=left, 4=right)
SeeAlso: AH=00h"Portfolio",AH=10h"Portfolio",AH=12h"Portfolio"
--------N-6112-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "enable_async" - ENABLE ASYNCHRONOUS HANDLERS
        AH = 12h
Return: CF clear
        AX = previous state
            0000h async calls were disabled
            else  async calls were already enabled
SeeAlso: INT 61"FTP Software",INT 61/AH=11h
--------b-6112-------------------------------
INT 61 - Atari Portfolio - SCREEN REFRESH
        AH = 12h
Return: nothing
Desc:   copy contents of video RAM to LCD controller
SeeAlso: AH=10h"Portfolio",AH=11h"Portfolio",AH=15h"Portfolio"
--------N-6113-------------------------------
INT 61 - PC/TCP kernel v2.05 - "net_connect" - OPEN A NETWORK CONNECTION
        AH = 13h
        BX = network descriptor (FFFFh for automatic net_getdesc)
        DX = protocol (see #03461)
        DS:SI -> buffer for "addr" structure (see #03462)
Return: CF clear if successful
            AX = network descriptor used or allocated
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Notes:  resets the connection with AH=19h in various cases
        will wait for protocol on stream connections unless non-blocking was
          set with AH=20h
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=18h,INT 61/AH=23h
SeeAlso: INT 63/AH=14h"BW-TCP"

(Table 03461)
Values for PC/TCP protocol:
 0001h  raw net (undocumented)
 0002h  raw IP
 0003h  datagram (UDP)
 0004h  stream (TCP)
 0005h  raw ICMP

Format of structure "addr":
Offset  Size    Description     (Table 03462)
 00h    DWORD   Internet address (network order)
 04h    WORD    remote socket number (network order)
 06h    WORD    local socket number (network order) 0000h means "you choose"
 08h    BYTE    protocol (see #03461)
--------N-6114-------------------------------
INT 61 Ou - PC/TCP kernel v2.05 - "net_recv" - NO LONGER SUPPORTED
        AH = 14h
        BX = network descriptor
Return: CF set
            AX = 0018h (see #03319 at INT 61"FTP Software")
Notes:  displays error message "Illegal system call!  Please upgrade your
          PCserver software" to standard output
        this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=0Ah,INT 61/AH=15h
--------N-6115-------------------------------
INT 61 - PC/TCP kernel v2.05 - "net_recvfrom" - ???
        AH = 15h
        ???
Return: ???
Notes:  this function is described as "unused" in the v2.2 documentation
        this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
SeeAlso: INT 61/AH=0Bh,INT 61/AH=14h
--------b-6115-------------------------------
INT 61 - Atari Portfolio - SOUND GENERATION
        AH = 15h
        AL = function
            00h key click
            01h beep
            02h alarm
Return: nothing
SeeAlso: AH=00h"Portfolio",AH=12h"Portfolio",AH=16h"Portfolio"
--------N-6116-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_peer" - GET DATA ON REMOTE PEER
        AH = 16h
        BX = network descriptor
        DS:DX -> 9-byte buffer for "addr" structure (see #03462)
Return: CF clear if successful
            buffer filled
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Range:  INT 20 to INT E0, selected by configuration
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP"
--------b-6116-------------------------------
INT 61 - Atari Portfolio - MELODY TONE GENERATOR
        AH = 16h
        CX = length of tones in 1/100 sec
        DL = tone code (see #03463)
SeeAlso: AH=15h"Portfolio",AH=17h"Portfolio"

(Table 03463)
Values for Atari Portfolio tone code:
 04h    A6#01864.7 Hz
 05h    B6      1975.5 Hz
 06h    D7      2348.3 Hz
 07h    D7#     2489.0 Hz
 0Eh    F6#     1480.0 Hz
 25h    C7      2093.0 Hz
 29h    D6      1174.7 Hz
 2Ch    G6#     1661.2 Hz
 2Fh    C7#     2217.5 Hz
 30h    D5#     622.3 Hz
 31h    E5      659.3 Hz
 32h    F5      698.5 Hz
 33h    F5#     740.0 Hz
 34h    G5      784.0 Hz
 35h    G5#     830.6 Hz
 36h    A5      880.6 Hz
 37h    A5#     932.3 Hz
 38h    B5      987.8 Hz
 39h    C6      1046.5 Hz
 3Ah    C6#     1108.7 Hz
 3Bh    D6#     1244.5 Hz
 3Ch    E6      1318.5 Hz
 3Dh    F6      1396.9 Hz
 3Eh    G6      1568.9 Hz
 3Fh    A6      1760.0 Hz
--------N-6117-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_reconfig" - RE-READ KERNEL CONFIGURATION
        AH = 17h
Return: CF clear if successful
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Notes:  this routine is deprecated in v2.1+ and will eventually be withdrawn;
          in v2.1+, this function calls AH=01h which should be used instead
        this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=01h"PC/TCP"
--------b-6117-------------------------------
INT 61 - Atari Portfolio - DIAL NUMBER
        AH = 17h
        DS:SI -> ASCII string containing number to dial
        CX = length of string
Note:   valid characters for string are "0123456789ABCD*#"
SeeAlso: AH=00h"Portfolio",AH=15h"Portfolio",AH=16h"Portfolio"
SeeAlso: AH=18h"Portfolio"
--------N-6118-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_eof" - CLOSE TRANSMIT SIDE OF CONNECTION
        AH = 18h
        BX = network descriptor
Return: CF clear if successful
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Note:   a TCP "FIN" command is sent and no further data may be transmitted,
          although the connection remains open
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=13h"PC/TCP"
SeeAlso: INT 63/AH=0Eh"BW-TCP"
--------b-6118-------------------------------
INT 61 - Atari Portfolio - MUTE STATES
        AH = 18h
        AL = function
            00h get mute state
            01h set mute state
            02h get key click state
            03h set key click state
            04h get beep state
            05h set beep state
            06h get alarm state
            07h set alarm state
            08h get DTMF duration
            09h set DTMF duration
        DL = new state ("set" functions) (00h off [muted], 01h on)
Return: DL = current state ("get" functions) (00h off [muted], 01h on)
SeeAlso: AH=15h"Portfolio",AH=16h"Portfolio",AH=17h"Portfolio"
SeeAlso: AH=19h"Portfolio"
--------N-6119-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_abort" - RESET A NETWORK CONNECTION
        AH = 19h
        BX = network descriptor
Return: CF clear if successful
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Desc:   immediately destroys the specified connection
Note:   send a TCP "RST" command if a stream connection is open
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=24h
--------b-6119-------------------------------
INT 61 - Atari Portfolio - GET SERIAL PORT PARAMETERS
        AH = 19h
        DX = serial port number
Return: AH = status
            00h successful
                AL = composite parameters (see #00300 at INT 14/AH=00h"SERIAL")
            other error
SeeAlso: AH=00h"Portfolio",AH=15h"Portfolio",AH=1Ah"Portfolio"
--------N-611A-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_write" - WRITE TO THE NETWORK
        AH = 1Ah
        BX = network descriptor
        CX = number of bytes to transmit (0000h allowed)
        DX = send options (see #03464)
        DS:SI -> data to be written
Return: CF clear if successful
            AX = number of bytes actually written
            DX = ???
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
InstallCheck:   test for the signature "TCPTSR" three bytes beyond the start
          of the interrupt handler
Range:  INT 20h to INT E0h, selected by configuration
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=1Bh,INT 61/AH=1Ch
SeeAlso: INT 63/AH=19h"BW-TCP",INT 63/AH=1Bh"BW-TCP"

Bitfields for PC/TCP send options:
Bit(s)  Description     (Table 03464)
 0      signal "URG"ent data
 3      attempt rerouting on non-stream calls if first attempt fails
 4      send data with PUSH flag (no override of Nagle)
 5      fail rather than truncating datagram
 6      fail rather than blocking
 7      broadcast packet
--------b-611A-------------------------------
INT 61 - Atari Portfolio - GET PERIPHERAL ID BYTE
        AH = 1Ah
Return: AH = peripheral ID byte
        AL = 00h if no peripheral installed
Desc:   get the ID code for the current terminating peripheral
SeeAlso: AH=00h"Portfolio",AH=18h"Portfolio",AH=1Bh"Portfolio"
--------N-611B-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_read" - READ FROM THE NETWORK
        AH = 1Bh
        BX = network descriptor
        CX = maximum number of bytes to read
        DX = receive options (see #03465)
        DS:SI -> buffer for data
        ES:DI -> "addr" structure (see #03462) for remote from which to read
                0000h:0000h for any
Return: CF clear if successful
            AX = number of bytes actually read
            DX = ???
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=1Ah,INT 61/AH=1Dh

Bitfields for PC/TCP receive options:
Bit(s)  Description     (Table 03465)
 1      do not remove data from queue, just copy it
 2      do not copy data, just remove it from queue
 5      fail if datagram would be truncated
 6      do not block, return error if no data available
Note:   special case for UDP: if both 1 and 2 set, return number of datagrams
--------b-611B-------------------------------
INT 61 - Atari Portfolio - SET PERIPHERAL ID BYTE
        AH = 1Bh
        AL = which peripheral to set
            00h serial
            01h parallel
        DL = peripheral ID
Return: nothing
Desc:   specify that a peripheral is compatible with the BIOS serial or
          parallel services
SeeAlso: AH=1Ah"Portfolio",AH=1Ch"Portfolio"
--------N-611C-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_writeto" - WRITE A DATAGRAM
        AH = 1Ch
        BX = network descriptor
        CX = number of bytes to transmit (0000h allowed)
        DX = send options (see #03464)
        DS:SI -> data to be written
        ES:DI -> "addr" structure (see #03462)
Return: CF clear if successful
            AX = number of bytes actually written
            DX = ???
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Note:   this function differs from AH=1Ah in that the address and socket
          numbers can be overridden
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=1Ah,INT 61/AH=1Dh
SeeAlso: INT 63/AH=21h"BW-TCP"
--------b-611C-------------------------------
INT 61 - Atari Portfolio - PRESET/GET PERIPHERAL DATA
        AH = 1Ch
        AL = function
            00h preset data values
                BL = data value
                DX = I/O address
            01h get data values
        BH = table entry number (04h-09h)
Return: if function 01h
            BL = data value
            DX = I/O address
Desc:   preset peripheral I/O data in a table mapping I/O addresses to data
          values; function 00h additionally outputs the data value to the
          I/O port
SeeAlso: AH=1Ah"Portfolio",AH=1Bh"Portfolio",AH=1Eh"Portfolio"
--------N-611D-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_readfrom" - READ A DATAGRAM
        AH = 1Dh
        BX = network descriptor
        CX = maximum number of bytes to read
        DX = receive options (see #03464)
        DS:SI -> buffer for received data
        ES:DI -> 9-byte buffer containing "addr" structure (see #03462)
Return: CF clear if successful
            AX = number of bytes read
            DX = ???
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Notes:  this function can read from any host or a designated host depending
          on settings in the "addr" structure
        only for use with datagram or Raw descriptors
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=1Bh,INT 61/AH=1Ch
--------N-611E-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_flush" - FLUSH PENDING DATA
        AH = 1Eh
        BX = network descriptor
Return: CF clear if successful
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Range:  INT 20 to INT E0, selected by configuration
Notes:  bufferred data is transmitted immediately, overriding Nagle's algorithm
          if necessary
        this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP"
--------b-611E-------------------------------
INT 61 - Atari Portfolio - GET/SET CLOCK TICK SPEED
        AH = 1Eh
        AL = function
            00h get speed
            01h set speed
                BX = clock tick speed
                    0000h tick every 128 seconds
                    0001h tick every second
Return: if function 00h
            BX = clock tick speed
Note:   the faster tick speed also uses more power
SeeAlso: AH=00h"Portfolio",AH=1Ch"Portfolio",AH=1Fh"Portfolio"
--------N-611F-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_asynch" - SET UP ASYNCHRONOUS CALL-BACK
        AH = 1Fh
        BX = network descriptor
        CX = event type (see #03466)
        DS:SI -> event handler routine (see #03467)
        ES:DI = 32-bit hint passed to handler
Return: CF clear if successful
            DS:DX -> previous handler
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Note:   ICMP messages do not trigger events on stream connections
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP"

(Table 03466)
Values for PC/TCP event type:
 00h    alarm
 01h    open (successfully opened stream connection)
 02h    receive (data available)
 03h    transmit (ACK received on stream connection)
 04h    transmit flush???
 05h    foreign close (remote host closed data connection)
 06h    close (local host closed connection and protocol is complete)
 07h    error (error code passed to handler as arg)

(Table 03467)
Values PC/TCP user event handler is called with:
        BX = network descriptor
        CX = event type (see #03466)
        DS:DX -> arg
        ES:DI = 32-bit hint value
        STACK:  small stack, possibly the DOS stack
--------b-611F-------------------------------
INT 61 - Atari Portfolio - GET KEY/NMI-INVOKED SCREEN REFRESH
        AH = 1Fh
        AL = function
            00h get state
            01h set state
                DH = new refresh-on-NMI state
                    (00h disabled, 01h enabled, bit 7 set = don't change)
                DL = new refresh-on-key state
Return: DH,DL = current/old states
SeeAlso: AH=00h"Portfolio",AH=1Eh"Portfolio",AH=20h"Portfolio"
--------N-6120-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "set_option" - SET AN OPTION ON A DESCRIPTOR
        AH = 20h
        BX = network descriptor
        CX = length of buffer (usually 04h)
        DS:DX -> buffer containing option
        SI = (ignored by v2.2-)
        DI = option to set (see #03468)
Return: CF clear if successful
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Notes:  Beame&Whiteside's BWPCTCP shim only supports options 01h and 0Bh; all
          others return CF clear
        v2.11 reportedly stores the actual 32-bit value of an option in DS:DX
          rather than using a buffer in memory
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=21h

(Table 03468)
Values for PC/TCP option to get or set:
 01h    set non-blocking mode if non-zero
 02h    timeout of call in milliseconds
 03h    user-defined 4-byte magic cookie (not used by kernel)
 04h    TCP window or UDP buffer count (WORD, unsigned)
 06h    do TCP keep-alives if non-zero
 09h    (v2.1+) set IP precedence
 0Ah    (v2.1+) set IP type of service
 0Bh    use a privileged port if port = 0
 0Ch    turn off TCP PUSH bit and don't flush buffer every write (see AH=1Ah)
Note:   use "C" true or false values for boolean options
--------b-6120-------------------------------
INT 61 - Atari Portfolio - GET/SET INT 09 REVECTORING
        AH = 20h
        AL = function
            00h get INT 09 revectoring state
            01h set state
                DL = new state (00h disable, 01h enable)
Return: if function 00h
            DL = new state (00h disabled, 01h enabled)
Desc:   specify whether INT 09 is automatically revectored to the BIOS,
          preventing applications from using their own INT 09 handler on the
          incompatible keyboard hardware
SeeAlso: AH=1Eh"Portfolio",AH=1Fh"Portfolio",AH=24h"Portfolio"
--------N-6121-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "get_option" - GET OPTIONS APPLIED TO NET DESCR
        AH = 21h
        BX = network descriptor
        CX = length of buffer
        DS:DX -> buffer for return values
        SI = 0004h (ignored by v2.2-)
        DI = option (see #03468)
Return: CF clear if successful
            DS:DX -> value (usually 32 bits) returned by selected option
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Notes:  this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
        v2.11 reportedly stores the actual 32-bit value of an option in DS:DX
          rather than using a buffer in memory
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=20h
--------N-6122-------------------------------
INT 61 u - PC/TCP kernel v2.05+ - "net_getdesc" - ALLOCATE NETWORK DESCRIPTOR
        AH = 22h
Return: CF clear if successful
            AX = network descriptor
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Note:   the descriptor will be an integer in the range 00h-1Fh, and a DOS call
          is made to allocate this as a file descriptor.  Hence a number may
          not refer to a PC/TCP network descriptor and a DOS file handle
          simultaneously.
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=13h,INT 61/AH=29h
--------N-6123-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_listen" - LISTEN FOR INCOMING CONNECTIONS
        AH = 23h
        BX = network descriptor or FFFFh to allocate descriptor
        DX = type of service
        DS:SI -> "addr" structure (see #03462)
Return: CF clear if successful
            AX = network descriptor
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Notes:  type of service and "addr" structure are as for AH=13h
        any of the address structure can be zero; normally local socket number
          is filled in prior to call
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=13h
SeeAlso: INT 63/AH=12h"BW-TCP"
--------N-6124-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_abortall" - RESET ALL NETWORK CONNECTIONS
        AH = 24h
Return: always successful
Note:   performs "net_abort" (AH=19h) on all open non-global descriptors
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=19h
--------b-6124-------------------------------
INT 61 - Atari Portfolio - GET/SET ROM/CCM SPACE STATE
        AH = 24h
        AL = function
            00h get state
            01h set state
                DL = new ROM state (see #03469)
                DH = new CCM state (see #03470)
Return: CF clear if successful
            DL = current/old ROM state
            DH = current/old CCM state
        CF set on error (invalid option or other error)
Desc:   control whether memory cards or an extension ROM are visible in the
          range 000C0000h to 000DFFFFh
SeeAlso: AH=00h"Portfolio",AH=20h"Portfolio",AH=26h"Portfolio"

(Table 03469)
Values for Atari Portfolio ROM space state:
 00h    normal application ROM
 01h    CCM drive A:
 02h    CCM drive B:
 03h    expansion ROM
SeeAlso: #03470

(Table 03470)
Values for Atari Portfolio CCM space state:
 00h    CCM drives disabled
 01h    CCM drive A: permanently enabled
 02h    CCM drive B: permanently enabled
SeeAlso: #03469
--------N-6125-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "ad_res_name" - GET HOST NAME GIVEN ADDRESS
        AH = 25h
        DX,BX = IP address in network order
        CX = length of buffer for name
        DS:SI -> buffer for host name
Return: CF clear if successful
           buffer filled with ASCIZ host name
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Note:   this function will use the host table and or DNS to resolve the
          address, depending on kernel configuration.  Use this call for the
          normal gethostbyaddr function.
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=26h,INT 61/AH=27h
--------N-6126-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "ad_htable" - GET HOST NAME FROM LOCAL TABLE
        AH = 26h
        DX,BX = IP address in network order
        CX = length of buffer
        DS:SI -> buffer for host name
Return: CF clear if successful
            buffer filled with ASCIZ host name
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Notes:  normally one would use AH=25h instead of this function
        this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=25h,INT 61/AH=27h
--------b-6126-------------------------------
INT 61 - Atari Portfolio - GET/SET POWER CONTROL
        AH = 26h
        AL = function
            00h get state
            01h set state
                DL = new state
                    00h normal power-down on low battery
                    01h no power-down, but display warning
                    02h no power-down, no warning on low battery
Return: AL = current/old state
SeeAlso: AH=00h"Portfolio",AH=24h"Portfolio",AH=28h"Portfolio"
--------N-6127-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "ad_domain" - GET HOST NAME FROM DNS
        AH = 27h
        DX,BX = IP address in network order
        CX = length of buffer
        DS:SI -> buffer for host name
Return: CF clear if successful
            buffer filled with ASCIZ host name
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Note:   normally one would use AH=25h instead of this function
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=25h,INT 61/AH=26h
--------N-6128-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_swap" - EXCHANGE TWO NETWORK DESCRIPTORS
        AH = 28h
        BX = network descriptor 1
        CX = network descriptor 2
Return: CF clear if successful
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Note:   the two descriptors will exchange places; both must be local or both
          global
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP"
--------b-6128-------------------------------
INT 61 - Atari Portfolio - GET/SET TEXT/KEYBOARD LANGUAGE
        AH = 28h
        AL = function
            00h get languages
            01h set languages
                DH = new text language (set bit 7 to leave unchanged)
                DL = new keyboard language (set bit 7 to leave unchanged)
            03h get language table pointers
Return: if function 00h or 01h:
            DH = current/old text language
            DL = current/old keyboard language
        if function 03h
            ES:CX -> keyboard table (see #03471)
            ES:DX -> language table (see #03471)
SeeAlso: AH=24h"Portfolio",AH=26h"Portfolio",AH=2Ch"Portfolio"

Format of Atari Portfolio language table:
Offset  Size    Description     (Table 03471)
 00h    BYTE    number of languages supported
 01h  N BYTEs   supported languages
                00h English
                01h French
                02h German
                03h Spanish
                04h Italian
                05h Swedish
                06h Danish
--------N-6129-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "net_getglobdesc" - ALLOCATE GLOBAL DESCRIPTOR
        AH = 29h
Return: CF clear if successful
            AX = network descriptor
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Note:   use this function rather than AH=22h to avoid a DOS call by the PC/TCP
          kernel; the returned descriptor will be >= 40h and cannot be used
          with "net_select" (AH=0Eh)
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=07h"PC/TCP"
SeeAlso: INT 61/AH=22h
--------N-612A-------------------------------
INT 61 - PC/TCP kernel v2.05+ - GET CONFIGURATION INFORMATION
        AH = 2Ah
        DS:SI -> 26-byte buffer for configuration information (see #03472)
Return: CF clear
        AX = 0000h
        buffer filled
Notes:  size of buffer may vary with kernel version; 26 bytes is the size for
          versions 2.05 through 2.2
        this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP"

Format of PC/TCP configuration information:
Offset  Size    Description     (Table 03472)
 00h    BYTE    maximum TCP connections available
 01h    BYTE    maximum UDP connections available
 02h    BYTE    maximum IP connections available
 03h    BYTE    maximum Raw Net connections available
 04h    BYTE    number of TCP connections currently in use
 05h    BYTE    number of UDP connections currently in use
 06h    BYTE    number of IP connections currently in use
 07h    BYTE    number of Raw Net connections currently in use
 08h    WORD    number of local network descriptors active
 0Ah    WORD    number of global network descriptors active
 0Ch    BYTE    maximum header size on network
 0Dh    BYTE    maximum trailer size on network
 0Eh    WORD    size of large packet buffer
 10h    WORD    number of network interfaces attached
 12h    DWORD   milliseconds since kernel started
 16h    DWORD   IP broadcast address
--------N-612B-------------------------------
INT 61 - PC/TCP kernel v2.02+ - "net_alarm" - SET TIMED ASYNCHRONOUS EVENT
        AH = 2Bh
        BX = network descriptor
        CX,DX = time before alarm in milliseconds
        DS:SI -> handler which will receive call (see #03467 at INT 61/AH=1Fh)
        ES:DI = 32-bit cookie passed to handler
Return: CF clear if successful
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Notes:  this function will cause a NET_AS_ALARM to be generated; it is intended
          for TSRs, etc. to regain control periodically
        this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP"
--------b-612C-------------------------------
INT 61 - Atari Portfolio - GET VERSION
        AH = 2Ch
Return: DS:BX -> BIOS version string ('$'-terminated)
SeeAlso: AH=28h"Portfolio",AH=2Dh"Portfolio"
--------b-612D-------------------------------
INT 61 - Atari Portfolio - TURN SYSTEM OFF
        AH = 2Dh
Return: nothing
SeeAlso: AH=00h"Portfolio",AH=2Ch"Portfolio",AH=2Eh"Portfolio"
--------b-612E-------------------------------
INT 61 - Atari Portfolio - ENABLE/DISABLE SYSTEM STATUS LINE
        AH = 2Eh
        AL = new state
            00h disabled
            01h enabled
                DH,DL = row,column at which to display
Return: nothing
SeeAlso: AH=00h"Portfolio",AH=2Dh"Portfolio",AH=30h"Portfolio"
--------N-6130-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "icmp_ping" - SEND ICMP ECHO REQUEST (PING)
        AH = 30h
        BX,DX = IP address of host
        CX = length of data to send
Return: CF clear if successful (i.e. reply received)
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Note:   this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP"
--------b-6130-------------------------------
INT 61 - Atari Portfolio - FILE TRANSFER SERVICES
        AH = 30h
        AL = function
            00h transmit block
                CX = number of bytes to send
            01h receive block
                CX = buffer size
            02h open ports
            03h close ports
            04h wait 500ms
        DS:DX -> start of data buffer
Return: DL = status
            00h successful
            01h buffer too small
            02h transmission timeout
            03h checksum failure
            04h invalid subfunction
            05h peripheral not installed
        if function 01h:
            CX = number of bytes received
SeeAlso: AH=00h"Portfolio",AH=2Eh"Portfolio"
--------N-61---------------------------------
INT 61 u - PC/TCP kernel v2.05 - NOP for SLIP kernel
        AH = function
            31h "net_add_route"
            32h "net_del_route"
            33h "net_dump_routes"
Notes:  these functions are described as "unused" in the v2.2 documentation
        router configuration can be altered using INT 61/AH=01h
        this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
--------N-6132-------------------------------
INT 61 U - PC/TCP kernel v2.3 - GET ???
        AH = 32h
Return: AX = ???
Note:   this function is fully re-entrant, and may be called even when another
          PC/TCP kernel call is already in progress
--------N-6134-------------------------------
INT 61 U - PC/TCP kernel v2.1+ - "icmp_destun" - ???
        AH = 34h
        ???
Return: ???
Notes:  this function is described as "reserved" in the v2.2 documentation
        this function is not supported by Beame&Whiteside's BWPCTCP v3.0a shim
--------N-6150-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "nm_prs_addr" - TRANSLATE NUMERICAL IP ADDRESS
        AH = 50h
        DS:DX -> ASCIZ IP address as "dotted quad" (max 127 chars)
Return: CF clear if successful
            DX:AX -> IP address
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Range:  INT 20 to INT E0, selected by configuration
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=54h
--------N-6151-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "nm_htable" - RESOLVE NAME USING HOST TABLE
        AH = 51h
        CX = size of destination buffer
        DS:DX -> ASCIZ host name (max 127 chars)
        ES:DI -> destination buffer or 0000h:0000h
Return: CF clear if successful
            DX:AX -> IP address of host
            destination buffer filled with canonical host name
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Note:   this function calls DOS, and can fail if the DOS call fails
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=54h
--------N-6152-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "nm_domain" - RESOLVE NAME USING DNS
        AH = 52h
        CX = size of destination buffer
        DS:DX -> ASCIZ host name (max 127 chars)
        ES:DI -> destination buffer or 0000h:0000h
Return: CF clear if successful
            DX:AX -> IP address of host
            destination buffer filled with canonical host name
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Note:   this function will poll all configured domain name servers if necessary
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=54h
--------N-6153-------------------------------
INT 61 - PC/TCP kernel v2.05- - "nm_ien116" - RESOLVE HOST NAME USING IEN116
        AH = 53h
        DS:DX -> ASCIZ name to be resolved (max 127 chars)
Return: CF clear if successful
            DX:AX -> IP address of host
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Range:  INT 20 to INT E0, selected by configuration
Note:   this function is not supported by v2.10+
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=54h
--------N-6154-------------------------------
INT 61 - PC/TCP kernel v2.05+ - "nm_res_name" - RESOLVE HOST NAME
        AH = 54h
        CX = size of destination buffer
        DS:DX -> ASCIZ host name (max 127 chars)
        ES:DI -> destination buffer or 0000h:0000h
Return: CF clear if successful
            DX:AX -> IP address of host
            destination buffer filled with canonical host name
        CF set on error
            AX = error code (see #03319 at INT 61"FTP Software")
Note:   this function uses all configured methods in turn to resolve the
          name (numerical, then host table, then DNS, then IEN116)
BUG:    the SLIP kernel for v2.05 bounds-checks the wrong register, so values
          greater than 54h in AH may crash the system.  Other kernels may have
          this bug as well; it has been fixed in the v2.2 SLIPDRV kernel.
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=50h,INT 61/AH=51h
SeeAlso: INT 61/AH=52h,INT 61/AH=53h
--------N-6155-------------------------------
INT 61 U - PC/TCP kernel v2.3 - ???
        AH = 55h
        ???
Return: ???
SeeAlso: INT 61"FTP Software"
--------N-6156-------------------------------
INT 61 U - PC/TCP kernel v2.3 - ???
        AH = 56h
        ???
Return: ???
SeeAlso: INT 61"FTP Software"
--------N-6157-------------------------------
INT 61 U - PC/TCP kernel v2.3 - ???
        AH = 57h
        ???
Return: ???
SeeAlso: INT 61"FTP Software"
--------N-6158-------------------------------
INT 61 U - PC/TCP kernel v2.3 - ???
        AH = 58h
        ???
Return: ???
SeeAlso: INT 61"FTP Software"
--------N-6159-------------------------------
INT 61 U - PC/TCP kernel v2.3 - ???
        AH = 59h
        ???
Return: ???
SeeAlso: INT 61"FTP Software"
--------N-615A-------------------------------
INT 61 U - PC/TCP kernel v2.3 - ???
        AH = 5Ah
        ???
Return: ???
SeeAlso: INT 61"FTP Software"
--------N-615B-------------------------------
INT 61 U - PC/TCP kernel v2.3 - ???
        AH = 5Bh
        ???
Return: ???
SeeAlso: INT 61"FTP Software"
--------N-615C-------------------------------
INT 61 U - PC/TCP kernel v2.3 - ???
        AH = 5Ch
        ???
Return: ???
SeeAlso: INT 61"FTP Software"
--------N-615D-------------------------------
INT 61 U - PC/TCP kernel v2.3 - ???
        AH = 5Dh
        ???
Return: ???
SeeAlso: INT 61"FTP Software"
--------N-615E-------------------------------
INT 61 U - PC/TCP kernel v2.3 - ???
        AH = 5Eh
        ???
Return: ???
SeeAlso: INT 61"FTP Software"
--------N-615F-------------------------------
INT 61 U - PC/TCP kernel v2.3 - ???
        AH = 5Fh
        ???
Return: ???
SeeAlso: INT 61"FTP Software"
--------!---Section--------------------------
Interrupt List, part 16 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------*-62---------------------------------
INT 62 - reserved for user interrupt
--------d-62---------------------------------
INT 62 - Adaptec and OMTI controllers - DRIVE 0 DATA
Notes:  this vector stores the third four bytes of the parameter table for
          hard disk 0
SeeAlso: INT 60"Adaptec",INT 61"Adaptec",INT 63"Adaptec"
--------b-62---------------------------------
INT 62 - TI Professional PC - OPTION ROM DATA AREA POINTER (NOT A VECTOR!)
Desc:   the low word of this vector contains the segment of the RAM data area
          to be used by the expansion ROM at F400h:2000h, and the high word
          contains the length of the data area; this segment and size are
          both set to 0000h if no ROM is installed at F400h:2000h
SeeAlso: INT 61"TI Professional PC",INT 63"TI Professional"
SeeAlso: INT 66"TI Professional PC"
--------b-62---------------------------------
INT 62 - HP 95LX - USED BY CALCULATOR
SeeAlso: INT 60/DI=0104h"HP 95LX"
----------62---------------------------------
INT 62 - MS SQL Server/Sybase DBLIBRARY interface - ???
        AH = function (00h to 07h)
        CX = FFFEh
        DX = FFFFh
        ???
Return: ???
InstallCheck:   test for the string "DBLIBRARY" two bytes past the interrupt
          handler
SeeAlso: AH=08h"SQL"
Index:  installation check;MS SQL Server|installation check;Sybase DBLIBRARY
----------62---------------------------------
INT 62 - MPAUSE - ???
        details not yet avialable
Program: MPAUSE is a program by Manfred Michael which appeared in the German
         _EGA-Handbuch_ from  m&t-Verlag
--------N-62---------------------------------
INT 62 - XFS v1.76 - FILTERED PACKET DRIVER API
Program: XFS is a shareware Network File System client by Robert Juhasz
Desc:   XFS requires a packet driver to operate.  Since it does redirections,
          etc., it provides its own packet driver entry point, changing the
          signature string of the original packet driver to "XKT DRVR" so that
          it will no longer be found by the packet driver installation check
InstallCheck:   scan for the signature string "PKT DRVR" three bytes past the
          interrupt handler (the same as that for the packet driver
          specification)
Range:  INT 61 to INT 66, selected by scanning for two consecutive free
          vectors and hooking the second
SeeAlso: INT 60"Packet Driver Specification",INT 61"XFS"
----------62---------------------------------
INT 62 - PC-DRAFT - PRIMARY DISPLAY DRIVER
        ???
Return: ???
Program: PC-DRAFT is a powerful CAD environment by rhv.
SeeAlso: INT 64"PC-DRAFT",INT 65"PC-DRAFT",INT 66"PC-DRAFT",INT 67"PC-DRAFT"
--------N-6200-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - GET PHYSICAL HARDWARE ADDRESS
        AH = 00h
        DS:DX -> 6-byte buffer for address
Return: AX = length of hardware address???
Range:  INT 4C to INT FB, selected by configuration
Note:   the Beame&Whiteside TCP/IP protocol stack uses two consecutive
          interrupts (62h and 63h by default); the BW-NFS client uses a third
          consecutive interrupt (64h by default) if it is loaded
SeeAlso: AH=01h"ETHDEV",AH=04h"ETHDEV",AH=09h"ETHDEV",AH=0Eh"ETHDEV"
SeeAlso: AH=14h"ETHDEV",AH=18h"ETHDEV",AH=FEh,INT 21/AH=3Fh"BW-TCP"
SeeAlso: INT 63/AH=03h"BW-TCP",INT 63/AH=24h"BW-TCP",INT 64/AH=01h"BW-NFS"
--------V-620000-----------------------------
INT 62 u - FGDRIVER v3.03+ - "FG_ALLOCATE" - CREATE VIRTUAL VIDEO PAGE
        AX = 0000h
        BX = page number (0000h-003Fh)
Return: AX = status (0000h,0001h,0007h,0008h) (see #03473)
Program: FGDRIVER is the external video driver for the shareware
          Fastgraph/Light by Ted Gruber Software
InstallCheck:   test for the signature "FG" ten bytes beyond the start of the
          interrupt handler
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        The amount of memory required by the virtual video page depends on the
          current video mode
SeeAlso: AX=0001h,AX=0002h,AX=0003h,AX=0038h
Index:  installation check;Fastgraph/Light

(Table 03473)
Values for FGDRIVER status:
 0000h  successful
 0001h  specified page is a physical or logical page
 0007h  virtual page created/released, but memory control blocks corrupted
 0008h  not enough memory
 0009h  attempt to free a page which was never created
 FFFCh  insufficient memory
 FFFDh  page already created, or exists as physical or virtual page
 FFFEh  invalid page number
 FFFFh  memory manager not initialized
SeeAlso: #03474

(Table 03474)
Values for FGDRIVER functions (by driver version):
Name            v1.10   v3.03   v4.02
 FG_ALLOCATE    0042h   0000h   0000h
 FG_ALLOCCMS    009Dh   0001h   0001h
 FG_ALLOCEMS    009Eh   0002h   0002h
 FG_ALLOCXMS    009Fh   0003h   0003h
 FG_AUTOMODE    0004h   0004h   0004h
 FG_BESTMODE    0003h   0005h   0005h
 FG_BOX         00A2h   0006h   0006h
 FG_BOXDEPTH    00A3h   0007h   0007h
 FG_BOXX         --     0008h   0008h
 FG_BUTTON      0078h   0009h   0009h
 FG_CAPSLOCK    0070h   000Ah   000Ah
 FG_CHGATTR     0035h   000Bh   000Bh
 FG_CHGTEXT     0036h   000Ch   000Ch
 FG_CIRCLE      0030h   000Dh   000Dh
 FG_CIRCLEF      --     000Eh   000Eh
 FG_CLIPMAP      --      --     000Fh
 FG_CLIPMASK    0052h   000Fh   0010h
 FG_CLPIMAGE    004Ah   0010h   0011h
 FG_CLPRECT     002Bh   0011h   0012h
 FG_COLORS       --      --     0013h
 FG_COPYPAGE    005Fh   0012h   0014h
 FG_CURSOR      0007h   0013h   0015h
 FG_DASH        0027h   0014h   0016h
 FG_DASHREL     0028h   0015h   0017h
 FG_DEFCOLOR    0014h   0016h   0018h
 FG_DEFPAGES     --     0017h   0019h
 FG_DISPFILE    004Fh   0018h   001Ah
 FG_DISPLAY     004Dh   0019h   001Bh
 FG_DISPLAYP    004Eh   001Ah   001Ch
 FG_DISPPCX     0060h    --      --
 FG_DRAW        0025h   001Bh   001Dh
 FG_DRAWMAP     0047h   001Ch   001Eh
 FG_DRAWMASK    0051h   001Dh   001Fh
 FG_DRAWREL     0026h   001Eh   0020h
 FG_DRAWRELX     --     001Fh   0021h
 FG_DRAWX        --     0020h   0022h
 FG_DRECT       002Ch   0021h   0023h
 FG_DRWIMAGE    0049h   0022h   0024h
 FG_EGACHECK    0005h   0023h   0025h
 FG_ELLIPSE     002Dh   0024h   0026h
 FG_ELLIPSEF     --     0025h   0027h
 FG_ERASE       001Eh   0026h   0028h
 FG_FADEIN      0064h   0027h   0029h
 FG_FADEOUT     0065h   0028h   002Ah
 FG_FILLPAGE     --     0029h   002Bh
 FG_FINDPAGE     --      --     002Ch
 FG_FLICDONE     --      --     002Dh
 FG_FLICHEAD     --      --     002Eh
 FG_FLICMODE     --      --     002Fh
 FG_FLICOPEN     --      --     0030h
 FG_FLICPLAY     --      --     0031h
 FG_FLICSIZE     --      --     0032h
 FG_FLICSKIP     --      --     0033h
 FG_FLIPMASK    0054h   002Ah   0034h
 FG_FLOOD        --     002Bh   0035h
 FG_FLPIMAGE    004Ch   002Ch   0036h
 FG_FONTSIZE     --     002Dh   0037h
 FG_FREEPAGE    0043h   002Eh   0038h
 FG_GETADDR     0044h   002Fh   0039h
 FG_GETATTR     0037h   0030h   003Ah
 FG_GETBANKS     --      --     003Bh
 FG_GETBLOCK     --     0031h   003Ch
 FG_GETCHAR     0038h   0032h   003Dh
 FG_GETCLIP      --      --     003Eh
 FG_GETCLOCK    0099h   0033h   003Fh
 FG_GETCOLOR    0015h   0034h   0040h
 FG_GETDACS     00A4h   0035h   0041h
 FG_GETENTRY     --     0036h   0042h
 FG_GETHPAGE    0040h   0037h   0043h
 FG_GETIMAGE    0048h   0038h   0044h
 FG_GETINDEX    0016h   0039h   0045h
 FG_GETKEY      006Eh   003Ah   0046h
 FG_GETLINES    0010h   003Bh   0047h
 FG_GETMAP      0046h   003Ch   0048h
 FG_GETMAXX     000Ah   003Dh   0049h
 FG_GETMAXY     000Bh   003Eh   004Ah
 FG_GETMODE     0000h   003Fh   004Bh
 FG_GETPAGE     003Ch   0040h   004Ch
 FG_GETPIXEL    0020h   0041h   004Dh
 FG_GETRGB      001Ch   0042h   004Eh
 FG_GETVIEW      --      --     004Fh
 FG_GETVPAGE    003Eh   0043h   0050h
 FG_GETXBOX      --      --     0051h
 FG_GETXJOY     0076h   0044h   0052h
 FG_GETXJUST     --      --     0053h
 FG_GETXPOS     0021h   0045h   0054h
 FG_GETYBOX      --      --     0055h
 FG_GETYJOY     0077h   0046h   0056h
 FG_GETYJUST     --      --     0057h
 FG_GETYPOS     0022h   0047h   0058h
 FG_HUSH        008Eh   0048h   0059h
 FG_HUSHNEXT    008Fh   0049h   005Ah
 FG_IMAGEBUF     --     004Ah   005Bh
 FG_IMAGESIZ    0062h   004Bh   005Ch
 FG_INITEMS     00A0h   004Ch   005Dh
 FG_INITJOY     0075h   004Dh   005Eh
 FG_INITPM       --      --     005Fh??? (NOP in v4.02)
 FG_INITXMS     00A1h   004Eh   0060h
 FG_INSIDE       --     004Fh   0061h
 FG_INTJOY      0079h   0050h   0062h
 FG_INTKEY      006Fh   0051h   0063h
 FG_INVERT       --      --     0064h
 FG_JUSTIFY      --     0052h   0065h
 FG_KBINIT       --     0053h   0066h
 FG_KBLAST       --      --     0067h
 FG_KBRESET      --      --     0068h
 FG_KBTEST       --     0054h   0069h
 FG_LOADPCX      --      --     006Ah
 FG_LOCATE      0033h   0055h   006Bh
 FG_MAKEPCX     0061h   0057h   006Ch
 FG_MAKEPPR      --     0058h   006Dh
 FG_MAKESPR      --     0059h   006Eh
 FG_MAPRGB      001Dh   005Ah   006Fh
 FG_MEASURE     0098h   005Bh   0070h
 FG_MEMAVAIL    009Bh   005Ch   0071h
 FG_MEMORY       --     005Dh   0072h
 FG_MOUSE256     --      --     0073h
 FG_MOUSEBUT    007Ch   005Eh   0074h
 FG_MOUSECUR    007Eh   005Fh   0075h
 FG_MOUSEFIN     --     0060h   0076h
 FG_MOUSEINI    007Ah   0061h   0077h
 FG_MOUSELIM    0080h   0062h   0078h
 FG_MOUSEMOV    0081h   0063h   0079h
 FG_MOUSEPOS    007Dh   0064h   007Ah
 FG_MOUSEPTR    007Fh   0065h   007Bh
 FG_MOUSESPD    0082h   0066h   007Ch
 FG_MOUSEVIS    007Bh   0067h   007Dh
 FG_MOVE        0023h   0068h   007Eh
 FG_MOVEREL     0024h   0069h   007Fh
 FG_MUSIC       008Ch   006Ah   0080h
 FG_MUSICB      008Dh   006Bh   0081h
 FG_NUMLOCK     0072h   006Ch   0082h
 FG_PACK         --      --     0083h
 FG_PAGESIZE     --     006Dh   0084h
 FG_PAINT       002Fh   006Eh   0085h
 FG_PALETTE     0017h   006Fh   0086h
 FG_PALETTES    0018h   0070h   0087h
 FG_PAN         0066h   0071h   0088h
 FG_PATTERN     0050h   0072h   0089h
 FG_PCXHEAD      --     0073h   008Ah
 FG_PCXMODE      --     0074h   008Bh
 FG_PCXPAL       --      --     008Ch
 FG_PCXRANGE     --      --     008Dh
 FG_PLAYING     0091h   0075h   008Eh
 FG_POINT       001Fh   0076h   008Fh
 FG_POINTX       --     0077h   0090h
 FG_POLYEDGE     --      --     0091h
 FG_POLYFILL     --     0078h   0092h
 FG_POLYGON     002Eh   0079h   0093h
 FG_POLYLINE     --     007Ah   0094h
 FG_POLYOFF      --     007Bh   0095h
 FG_PRINT        --     007Ch   0096h
 FG_PRINTC       --      --     0097h
 FG_PUTBLOCK     --     007Dh   0098h
 FG_PUTIMAGE     --     007Eh   0099h
 FG_QUIET       0090h   007Fh   009Ah
 FG_RECT        002Ah   0080h   009Bh
 FG_RESET       0006h   0081h   009Ch
 FG_RESIZE      0045h   0082h   009Dh
 FG_RESTORE     005Bh   0083h   009Eh
 FG_RESUME      0092h   0084h   009Fh
 FG_REVIMAGE    004Bh   0085h   00A0h
 FG_REVMASK     0053h   0086h   00A1h
 FG_SAVE         --     0087h   00A2h
 FG_SCALE        --      --     00A3h
 FG_SCRLOCK     0074h   0088h   00A4h
 FG_SCROLL      0067h   0089h   00A5h
 FG_SETATTR     0019h   008Ah   00A6h
 FG_SETBANKS     --      --     00A7h
 FG_SETCAPS     0071h   008Bh   00A8h
 FG_SETCLIP     0029h   008Ch   00A9h
 FG_SETCOLOR    001Ah   008Dh   00AAh
 FG_SETDACS     00A5h   008Eh   00ABh
 FG_SETENTRY     --     008Fh   00ACh
 FG_SETFUNC     009Ch   0090h   00ADh
 FG_SETHPAGE    0041h   0091h   00AEh
 FG_SETLINES    0011h   0092h   00AFh
 FG_SETMODE     0001h   0093h   00B0h
 FG_SETNUM      0073h   0094h   00B1h
 FG_SETPAGE     003Dh   0095h   00B2h
 FG_SETRGB      001Bh   0096h   00B3h
 FG_SETVIEW      --      --     00B5h
 FG_SETVPAGE    003Fh   0098h   00B6h
 FG_SHEAR        --      --     00B7h
 FG_SHOWFLIC     --      --     00B8h
 FG_SHOWPCX      --     009Ah   00B9h
 FG_SHOWPPR      --     009Bh   00BAh
 FG_SHOWSPR      --     009Ch   00BBh
 FG_SOUND       0088h   009Dh   00BCh
 FG_SOUNDS      0089h   009Eh   00BDh
 FG_SPLIT        --      --     00BEh
 FG_STALL       0097h   009Fh   00BFh
 FG_SUSPEND     0093h   00A0h   00C0h
 FG_SVGAINIT     --     00A1h   00C1h
 FG_SVGASTAT     --     00A2h   00C2h
 FG_SVGAVER      --     00A3h   00C3h
 FG_TCDEFINE     --     00A4h   00C4h
 FG_TCMASK      005Eh   00A5h   00C5h
 FG_TCXFER      005Dh   00A6h   00C6h
 FG_TESTMODE    0002h   00A7h   00C7h
 FG_TEXT        0032h   00A8h   00C8h
 FG_TEXTC        --      --     00C9h
 FG_TRANSFER    005Ch   00A9h   00CAh
 FG_UNPACK       --      --     00CBh
 FG_VBADDR       --      --     00CCh
 FG_VBALLOC      --      --     00CDh
 FG_VBCLOSE      --      --     00CEh
 FG_VBCOPY       --      --     00CFh
 FG_VBCUT        --      --     00D0h
 FG_VBDEFINE     --      --     00D1h
 FG_VBFREE       --      --     00D2h
 FG_VBHANDLE     --      --     00D3h
 FG_VBINIT       --      --     00D4h
 FG_VBOPEN       --      --     00D5h
 FG_VBPASTE      --      --     00D6h
 FG_VBTCCOPY     --      --     00D7h
 FG_VBTCXFER     --      --     00D8h
 FG_VBUNDEF      --      --     00D9h
 FG_VGASTATE     --      --     00DAh
 FG_VOICE       008Ah   00AAh   00DBh
 FG_VOICES      008Bh   00ABh   00DCh
 FG_WAITFOR     0096h   00ACh   00DDh
 FG_WAITKEY     006Dh   00ADh   00DEh
 FG_WAITVR       --     00AEh   00DFh
 FG_WHERE       0034h   00AFh   00E0h
 FG_XALPHA      000Ch   00B0h   00E1h
 FG_XCONVERT    000Eh   00B1h   00E2h
 FG_XVIEW        --      --     00E3h
 FG_YALPHA      000Dh   00B2h   00E4h
 FG_YCONVERT    000Fh   00B3h   00E5h
 FG_YVIEW        --      --     00E6h
SeeAlso: #03473
--------V-620001-----------------------------
INT 62 u - FGDRIVER v3.03+ - "FG_ALLOCCMS" - CREATE LOGICAL VIDEO PAGE (CONV)
        AX = 0001h
        BX = page number (0001h-003Fh)
Return: AX = status (0000h,FFFCh,FFFDh,FFFEh) (see #03473)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        The only operation which is allowed on logical pages is "FG_COPYPAGE"
          (see AX=0014h)
SeeAlso: AX=0000h,AX=0002h,AX=0003h,AX=0014h,AX=0038h
--------V-620002-----------------------------
INT 62 u - FGDRIVER v3.03+ - "FG_ALLOCEMS" - CREATE LOGICAL VIDEO PAGE (EMS)
        AX = 0002h
        BX = page number (0001h-003Fh)
Return: AX = status (0000h,FFFCh,FFFDh,FFFEh) (see #03473)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        You must first call "FG_INITEMS" (see AX=005Dh) before using this
          function
        The only operation which is allowed on logical pages is "FG_COPYPAGE"
          (see AX=0014h)
SeeAlso: AX=0000h,AX=0001h,AX=0003h,AX=0014h,AX=0038h,AX=005Dh
--------V-620003-----------------------------
INT 62 u - FGDRIVER v3.03+ - "FG_ALLOCXMS" - CREATE LOGICAL VIDEO PAGE (XMS)
        AX = 0003h
        BX = page number (0001h-003Fh)
Return: AX = status (0000h,FFFCh,FFFDh,FFFEh) (see #03473)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        You must first call "FG_INITXMS" (see AX=0060h) before using this
          function
        The only operation which is allowed on logical pages is "FG_COPYPAGE"
          (see AX=0014h)
SeeAlso: AX=0000h,AX=0001h,AX=0002h,AX=0014h,AX=0038h,AX=0060h
--------V-620004-----------------------------
INT 62 u - FGDRIVER 1.10,3.03+ - "FG_AUTOMODE" - GET VIDEO MODE W/MOST FEATURES
        AX = 0004h
Return: AX = proposed video mode number (see #03500 at AX=00B0h)
Program: FGDRIVER is the external video driver for the shareware
          Fastgraph/Light by Ted Gruber Software
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=0005h,AX=004Bh,AX=00B0h,AX=00C1h,AX=00C7h
--------V-620005-----------------------------
INT 62 u - FGDRIVER v3.03+ - "FG_BESTMODE" - GET BEST VIDEO MODE GIVEN RESOLUTN
        AX = 0005h
        BX = horizontal resolution
        CX = vertical resolution
        DX = number of video pages required (both physical and virtual)
Return: AX = proposed video mode number or FFFFh if no matching video mode
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        You must first call "FG_SVGAINIT" (see AX=00C1h) to get SVGA video
          modes
SeeAlso: AX=0004h,AX=004Bh,AX=00B0h,AX=00C1h,AX=00C7h
--------V-620006-----------------------------
INT 62 u - FGDRIVER v3.03+ - "FG_BOX" - DRAW UNFILLED RECTANGLE
        AX = 0006h
        BX = left column
        CX = right column
        DX = top row
        SI = bottom row
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        The rectangle is drawn in screen space, respecting the clipping region,
          with edges of the width specified with "FG_BOXDEPTH" (see AX=0007h)
          (default = 1 is set by "FG_SETMODE")
        This function has no effect in text modes
SeeAlso: AX=0007h,AX=0008h,AX=000Ch,AX=0016h,AX=001Dh,AX=0026h,AX=0051h
SeeAlso: AX=0055h,AX=008Fh
--------V-620007-----------------------------
INT 62 u - FGDRIVER v3.03+ - "FG_BOXDEPTH" - SET RECTANGLE BORDER WIDTH
        AX = 0007h
        BX = width of left and right edges in pixels (> 0)
        CX = width of top and bottom edges in pixels (> 0)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=0006h,AX=0008h,AX=0051h,AX=0055h
--------V-620008-----------------------------
INT 62 u - FGDRIVER v3.03+ - "FG_BOXX" - XOR HOLLOW RECTANGLE
        AX = 0008h
        BX = left column
        CX = right column
        DX = top row
        SI = bottom row
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        The rectangle is XORed into screen space, respecting the clipping
          region, with edges of the width specified with "FG_BOXDEPTH"
          (see AX=0007h) (default = 1 is set by "FG_SETMODE")
        This function has no effect in text modes
SeeAlso: AX=0006h,AX=0007h,AX=0021h,AX=0022h,AX=0051h,AX=0055h,AX=0090h
--------V-620009-----------------------------
INT 62 u - FGDRIVER v3.03+ - "FG_BUTTON" - GET JOYSTICK BUTTON STATE
        AX = 0009h
        BX = joystick number (0001h or 0002h)
Return: AX = button states
            bit 0: top button pressed
            bit 1: bottom button pressed
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=0052h,AX=0056h,AX=005Eh,AX=0062h,AX=0077h
--------V-62000A-----------------------------
INT 62 u - FGDRIVER v3.03+ - "FG_CAPSLOCK" - GET STATE OF CAPSLOCK KEY
        AX = 000Ah
Return: AX = CapsLock state (0000h off, 0001h on)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=0082h,AX=00A4h,AX=00A8h,AX=00B1h
--------V-62000B-----------------------------
INT 62 u - FGDRIVER v3.03+ - "FG_CHGATTR" - APPLY CURRENT TEXT ATTRIB TO CHARS
        AX = 000Bh
        BX = number of characters to recolor
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        This call is ignored in graphics modes
        Starting at the current text cursor position, the specified number of
          characters have their attributes to the current text attribute
SeeAlso: AX=000Ch,AX=003Ah,AX=00A6h
--------V-62000C-----------------------------
INT 62 u - FGDRIVER v3.03+ - "FG_CHGTEXT" - DISPLAY STRING AT CURSOR POSITION
        AX = 000Ch
        CX = length of string
        ES:BX -> string to be displayed
Return: text cursor updated
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        This call is ignored in graphics modes
SeeAlso: AX=000Bh,AX=0096h
--------V-62000D-----------------------------
INT 62 u - FGDRIVER v3.03+ - "FG_CIRCLE" - DRAW UNFILLED CIRCLE
        AX = 000Dh
        BX = radius in horizontal screen space units (> 0)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        The circle is drawn in screen space, centered at the current graphics
          cursor position
        This call is ignored in text modes
SeeAlso: AX=0006h,AX=0008h,AX=000Eh,AX=0026h,AX=0093h
--------V-62000E-----------------------------
INT 62 u - FGDRIVER v3.03+ - "FG_CIRCLEF" - DRAW FILLED CIRCLE
        AX = 000Eh
        BX = radius in horizontal screen space units (> 0)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=0008h,AX=000Dh,AX=0027h,AX=0092h
--------V-62000F-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_CLIPMAP" - DISPLAY CLIPPED IMAGE (MODE-INDEP)
        AX = 000Fh
        ES:BX -> bitmap
        CX = width
        DX = height
Desc:   display a mode-independent bitmap, showing only the portion within
          the current clipping limits
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        This call is ignored in text modes and in native EGA and VGA graphics
          modes
        The image is drawn with its lower left corner at the current graphics
          cursor position
SeeAlso: AX=0011h,AX=001Fh,AX=0034h,AX=0086h,AX=00A9h,AX=00C5h
--------V-620010-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_CLIPMASK" - DISPLAY CLIPPED IMAGE (MASKING MAP)
        AX = 0010h
        ES:BX -> array containing image stored as a masking map (see #03475)
        CX = number of pixel runs in masking map
        DX = width of masking map in pixels
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        This call is ignored in text modes and in native EGA and VGA graphics
          modes
        The image is drawn with its lower left corner at the current graphics
          cursor position
SeeAlso: AX=0011h,AX=001Fh,AX=0034h,AX=00A1h,AX=00A9h,AX=00C5h
--------V-620011-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_CLPIMAGE" - DISPLAY CLIPPED IMAGE (BITMAP)
        AX = 0011h
        ES:BX -> mode-specific bitmap
        CX = width of bit map in bytes
        DX = height of bit map in pixel rows
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        This call is ignored in text modes
        The image is drawn with its lower left corner at the current graphics
          cursor position
        The current clipping region is used, extended to a byte boundary
SeeAlso: AX=0010h,AX=0024h,AX=0036h,AX=0044h,AX=00A0h,AX=00A9h,AX=00B9h
--------V-620012-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_CLPRECT" - DRAW FILLED RECTANGLE IN SCREEN SPCE
        AX = 0012h
        BX = screen space column of left edge
        CX = screen space column of right edge
        DX = screen space row of top edge
        SI = screen space row of bottom edge
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        This call is ignored in text modes
SeeAlso: AX=0006h,AX=0010h,AX=0011h,AX=0023h,AX=009Bh,AX=00A9h
--------V-620013-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_COLORS" - GET SIMULTANEOUSLY-AVAILABLE COLORS
        AX = 0013h
Return: AX = number of colors available at one time
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
--------V-620014-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_COPYPAGE" - TRANSFER VIDEO PAGE CONTENTS
        AX = 0014h
        BX = source page number (0000h-003Fh)
        CX = destination page number (0000h-003Fh)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        If both source and destination pages are logical pages, they must both
          be located in the same type (conventional, EMS, XMS) of memory
SeeAlso: AX=009Eh,AX=00A2h,AX=00C6h,AX=00CAh
--------V-620015-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_CURSOR" - SPECIFY WHETHER TEXT CURSR IS VISIBLE
        AX = 0015h
        BX = new state (0000h invisible, 0001h visible)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        This call is ignored in text modes
SeeAlso: AX=000Ch,AX=0054h,AX=0058h,AX=006Bh,AX=0075h,AX=0079h,AX=007Eh
SeeAlso: AX=00E0h
--------V-620016-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_DASH" - DRAW DASHED LINE TO ABSOLUTE POSITION
        AX = 0016h
        BX = endpoint column
        CX = endpoint row
        DX = dash pattern (set bits cause drawn pixels)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        This call is ignored in text modes
        The starting point is the current graphics cursor position; the cursor
          position is updated
SeeAlso: AX=0017h,AX=001Dh,AX=008Fh
--------V-620017-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_DASHREL" - DRAW DASHED LINE TO RELATVE POSITION
        AX = 0017h
        BX = endpoint column offset
        CX = endpoint row offset
        DX = dash pattern (set bits cause drawn pixels)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        This call is ignored in text modes
        The starting point is the current graphics cursor position; the cursor
          position is updated
SeeAlso: AX=0016h,AX=001Eh,AX=008Fh
--------V-620018-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_DEFCOLOR" - ASSIGN COLOR VALUE TO COLOR INDEX
        AX = 0018h
        BX = color index (0000h-00FFh)
        CX = new color value (0 to maximum color value for current video mode)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        This call is ignored in text modes and 256-color graphics modes
SeeAlso: AX=0040h,AX=0045h,AX=00AAh
--------V-620019-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_DEFPAGES" - DEF SRC/DEST PAGES FOR BLOCK XFERS
        AX = 0019h
        BX = source page
        CX = destination page
Desc:   specify the source and destination SVGA banks for block transfers on
          extended video pages
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        This function is ignored if the video controller does not support
          extended pages or the current video mode does not allow them
SeeAlso: AX=0014h,AX=00CAh
--------V-62001A-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_DISPFILE" - DISPLAY STORED IMAGE
        AX = 001Ah
        ES:BX -> ASCIZ filename
        CX = image width in pixels (> 0)
        DX = image format
            0000h Fastgraph standard pixel run format
            0001h packed pixel run format
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        This call is ignored in text modes
        The image is displayed with its lower left corner at the current
          graphics cursor position
SeeAlso: AX=001Bh,AX=001Ch,AX=00B9h,AX=00BAh,AX=00BBh
--------V-62001B-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_DISPLAY" - DISPLAY IMAGE (STD PIXEL RUN FORMAT)
        AX = 001Bh
        ES:BX -> pixel run map (pairs of bytes: color index, count)
        CX = number of pixel runs to display
        DX = width of image in pixels (> 0)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        This call is ignored in text modes
        The image is displayed with its lower left corner at the current
          graphics cursor position
SeeAlso: AX=001Ah,AX=001Ch,AX=00B9h,AX=00BAh,AX=00BBh
--------V-62001C-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_DISPLAYP" - DISPLAY IMAGE (PACKED PIXEL RUNS)
        AX = 001Ch
        ES:BX -> pixel run map (trios of bytes: colors, count1, count2; colors
                  contains the color for the first run in its high nybble and
                  the color for the second run in its low nybble)
        CX = number of pixel runs to display
        DX = width of image in pixels (> 0)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        This call is ignored in text modes
        The image is displayed with its lower left corner at the current
          graphics cursor position
SeeAlso: AX=001Ah,AX=001Bh,AX=00B9h,AX=00BAh,AX=00BBh
--------V-62001D-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_DRAW" - DRAW SOLID LINE TO ABSOLUTE POSITION
        AX = 001Dh
        BX = endpoint column
        CX = endpoint row
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        This call is ignored in text modes
        The starting point is the current graphics cursor position; the cursor
          position is updated
SeeAlso: AX=0016h,AX=0020h,AX=0021h,AX=0026h,AX=008Fh,AX=0090h
--------V-62001E-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_DRAWMAP" - DISPLAY MODE-INDEPENDENT BIT MAP
        AX = 001Eh
        ES:BX -> bitmap (each set bit is pixel drawn in current color)
        CX = width of bitmap in bytes
        DX = height of bitmap in pixel rows
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=0011h,AX=0024h,AX=0036h,AX=0044h,AX=0099h,AX=00A0h
--------V-62001F-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_DRAWMASK" - DISPLAY IMAGE (MASKING MAP)
        AX = 001Fh
        ES:BX -> array containing image stored as a masking map (see #03475)
        CX = number of pixel runs in masking map
        DX = width of masking map in pixels
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        This call is ignored in text modes and in native EGA and VGA graphics
          modes
        The image is drawn with its lower left corner at the current graphics
          cursor position
SeeAlso: AX=0010h,AX=001Fh,AX=00A1h,AX=00A9h

Format of FGDRIVER masking map:
Offset  Size    Description     (Table 03475)
 00h    BYTE    length of first "protect" run (pixels remain unchanged)
 01h    BYTE    length of first "zero" run (pixels set to background color)
 02h    BYTE    length of second "protect" run
 03h    BYTE    length of second "zero" run
        ...
--------V-620020-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_DRAWREL" - DRAW SOLID LINE TO RELATIVE POSITION
        AX = 0020h
        BX = endpoint column offset
        CX = endpoint row offset
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes
        The starting point is the current graphics cursor position; the cursor
          position is updated
SeeAlso: AX=0006h,AX=000Dh,AX=001Dh,AX=0021h,AX=0026h,AX=008Fh
--------V-620021-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_DRAWRELX" - XOR SOLID LINE TO RELATIVE POSITION
        AX = 0021h
        BX = endpoint column offset
        CX = endpoint row offset
Desc:   draw a solid line, XORing each pixel onto the screen
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes
        The starting point is the current graphics cursor position; the cursor
          position is updated
SeeAlso: AX=0006h,AX=000Dh,AX=001Dh,AX=0020h,AX=0026h,AX=0090h
--------V-620022-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_DRAWX" - XOR SOLID LINE TO ABSOLUTE POSITION
        AX = 0022h
        BX = endpoint column
        CX = endpoint row
Desc:   draw a solid line, XORing each pixel onto the screen
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes
        The starting point is the current graphics cursor position; the cursor
          position is updated
SeeAlso: AX=001Dh,AX=0021h,AX=008Fh
--------V-620023-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_DRECT" - DRAW DITHERED RECTANGLE IN SCRN SPACE
        AX = 0023h
        BX = screen space column of left edge
        CX = screen space column of right edge
        DX = screen space row of top edge
        SI = screen space row of bottom edge
        ES:DI -> dithering matrix (video-mode dependent)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes
SeeAlso: AX=0006h,AX=0008h,AX=0013h,AX=003Ch,AX=0089h,AX=009Bh
--------V-620024-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_DRWIMAGE" - DISPLAY BITMAPPED IMAGE
        AX = 0024h
        ES:BX -> video mode-specific bitmap
        CX = width of bitmap in bytes
        DX = height of bitmap in pixel rows
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The image will be drawn with its lower left corner at the current
          cursor position (either text or graphics)
SeeAlso: AX=0011h,AX=0036h,AX=0044h,AX=0099h,AX=00A0h
--------V-620025-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_EGACHECK" - GET INFO ABOUT ACTIVE EGA DISPLAY
        AX = 0025h
Return: AX = number of 64K banks of video memory, or 0000h if no EGA or EGA
              without an Enhanced Color Display
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00C2h
--------V-620026-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_ELLIPSE" - DRAW UNFILLED ELLIPSE IN SCRN SPACE
        AX = 0026h
        BX = horizontal semi-axis length in screen space units
        CX = vertical semi-axis length in screen space units
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes
        The ellipse is centered at the current graphics cursor position
SeeAlso: AX=0006h,AX=000Dh,AX=0027h,AX=008Fh,AX=0093h
--------V-620027-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_ELLIPSEF" - DRAW FILLED ELLIPSE IN SCREEN SPACE
        AX = 0027h
        BX = horizontal semi-axis length in screen space units
        CX = vertical semi-axis length in screen space units
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes
        The ellipse is centered at the current graphics cursor position
SeeAlso: AX=0006h,AX=000Eh,AX=0026h,AX=008Fh,AX=0092h
--------V-620028-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_ERASE" - CLEAR THE ACTIVE VIDEO PAGE
        AX = 0028h
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function sets each pixel to 0 in graphics modes, each character
          cell to a blank with a gray foreground attribute in text modes
SeeAlso: AX=0029h,AX=002Bh,AX=0035h
--------V-620029-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_FADEIN" - FADE IN HIDDEN PAGE
        AX = 0029h
        BX = delay (0000h = fastest possible fade-in)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The current hidden page is copied to the current visible page in small
          random sections to produce a fade-in effect
        This call is ignored in text modes
SeeAlso: AX=0028h,AX=002Ah,AX=002Bh
--------V-62002A-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_FADEOUT" - FADE OUT TO CURRENT COLOR
        AX = 002Ah
        BX = delay (0000h = fastest possible fade-out)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The current visible page is filled with pixels of the current color in
          small random sections to give a fade-out effect
        This call is ignored in text modes
SeeAlso: AX=0028h,AX=0029h,AX=002Bh
--------V-62002B-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_FILLPAGE" - FILL THE ACTIVE VIDEO PAGE
        AX = 002Bh
Desc:   fill the active video page with pixels of the current color (graphics
          modes) or the block character DBh with the current character
          attributes (text modes)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0028h,AX=0029h,AX=002Ah
--------V-62002C-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_FINDPAGE" - FIND AVAILABLE VIRTUAL/LOGICAL PAGE
        AX = 002Ch
Return: AX = first available page number (virtual or logical page)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0028h
--------V-62002D-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_FLICDONE" - CLOSE FLIC FILE
        AX = 002Dh
        ES:BX -> context descriptor (see AX=0030h)
Return: nothing
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=002Eh,AX=0030h
--------V-62002E-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_FLICHEAD" - READ FLI/FLC FILE HEADER
        AX = 002Eh
        ES:BX -> FLICHEAD variable pointer record (see #03477)
Return: AX = status (see #03476)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=002Dh,AX=002Fh,AX=0030h,AX=0032h

(Table 03476)
Values for FGDRIVER FLIC processing status:
 0000h  successful
 FFFEh  not an FLI or FLC file
 FFFFh  file not found

Format of FGDRIVER FLICHEAD variable pointer record:
Offset  Size    Description     (Table 03477)
 00h    WORD    segment of ASCIZ FLI/FLC file name
 02h    WORD    offset of ASCIZ FLI/FLC file name
 04h    WORD    segment of buffer for 128-byte file header
 06h    WORD    offset of buffer for 128-byte file header
--------V-62002F-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_FLICMODE" - GET OPTIMAL VIDEO MODE FOR FLI/FLC
        AX = 002Fh
        ES:BX -> 128-byte buffer containing FLI/FLC file header (see AX=002Eh)
Return: AX = optimal 256-color graphics mode number
            FFFFh if invalid file header
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=002Eh,AX=0030h
--------V-620030-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_FLICOPEN" - OPEN FLI/FLC FILE
        AX = 0030h
        ES:BX -> FLICOPEN variable pointer record (see #03478)
Return: AX = status (see #03476)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=002Dh,AX=002Eh,AX=002Fh,AX=0030h,AX=0031h,AX=0032h

Format of FGDRIVER FLICOPEN variable pointer record:
Offset  Size    Description     (Table 03478)
 00h    WORD    segment of ASCIZ FLI/FLC file name
 02h    WORD    offset of ASCIZ FLI/FLC file name
 04h    WORD    segment of buffer for 16-byte file context descriptor
 06h    WORD    offset of buffer for 16-byte file context descriptor
--------V-620031-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_FLICPLAY" - DISPLAY NEXT FRAME(S) IN FLI/FLC
        AX = 0031h
        ES:BX -> context descriptor (see AX=0030h)
        CX = number of frames to display starting at current frame
        DX = control flags (see #03479)
Return: AX = number of frames displayed
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0030h,AX=0033h,AX=00B8h

Bitfields for FGDRIVER FLI/FLC control flags:
Bit(s)  Description     (Table 03479)
 0      skip inter-frame delay specified in FLI/FLC header
 1      display relative to current graphics position
 2      dipslay image from the FG_IMAGEBUF buffer instead of file
--------V-620032-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_FLICSIZE" - GET IMAGE SIZE
        AX = 0032h
        ES:BX -> FLICSIZE variable pointer record (see #03480)
Return: image height/width buffers updated; height is set to FFFFh on error
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=002Eh,AX=0030h

Format of FGDRIVER FLICSIZE variable pointer record:
Offset  Size    Description     (Table 03480)
 00h    WORD    segment of buffer for 128-byte FLI/FLC file header
 02h    WORD    offset of buffer for 128-byte FLI/FLC file header
 04h    WORD    segment of WORD buffer for image width in pixels
 06h    WORD    offset of WORD buffer for image width in pixels
 08h    WORD    segment of WORD buffer for image height in pixels
 0Ah    WORD    offset of WORD buffer for image height in pixels
--------V-620033-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_FLICSKIP" - SKIP FRAME(S) IN FLI/FLC FILE
        AX = 0033h
        ES:BX -> context descriptor (see AX=0030h)
        CX = number of frames to skip
            reset to first frame if skip count is negative
Return: AX = number of frames skipped (may be less than requested if EOF)
            0000h if resetting to first frame
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0030h,AX=0031h
--------V-620034-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_FLIPMASK" - DISPLAY INV CLIPPED IMAGE (MASKMAP)
        AX = 0034h
        ES:BX -> array containing image stored as a masking map (see #03475)
        CX = number of pixel runs in masking map
        DX = width of masking map in pixels
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes and in native EGA and VGA graphics
          modes
        The image is drawn with its lower left corner at the current graphics
          cursor position
SeeAlso: AX=000Fh,AX=001Fh,AX=0036h,AX=00A1h,AX=00A5h,AX=00C5h
--------V-620035-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_FLOOD" - FLOOD FILL ARBITRARY CLOSED REGION
        AX = 0035h
        BX = starting column
        CX = starting row
Desc:   fill the bounded region around the specified point (respecting clipping
          region) with the currrent color
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function is ignored in text modes
SeeAlso: AX=0028h,AX=0085h
--------V-620036-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_FLPIMAGE" - DISPLAY INV CLIPPED IMAGE (BITMAP)
        AX = 0036h
        ES:BX -> mode-specific bitmap
        CX = width of bit map in bytes
        DX = height of bit map in pixel rows
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes
        The image is drawn with its lower left corner at the current graphics
          cursor position
        The current clipping region is used, extended to a byte boundary
SeeAlso: AX=0011h,AX=0024h,AX=0034h,AX=0044h,AX=00A0h,AX=00A9h,AX=00B9h
--------V-620037-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_FONTSIZE" - SPECIFY FONT SIZE FOR TEXT OUTPUT
        AX = 0037h
        BX = desired character height in scan lines (8, 14, 16)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored if the current mode is not a VGA or SVGA graphics
          mode, or the specified character height is not 8, 14, or 16
SeeAlso: AX=0096h
--------V-620038-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_FREEPAGE" - FREE VIRTUAL OR LOGICAL VIDEO PAGE
        AX = 0038h
        BX = page number (0000h-003Fh)
Return: AX = status (0000h,0001h,0007h,0009h) (see #03473)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0000h,AX=0001h,AX=0002h,AX=0003h
--------V-620039-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETADDR" - GET SEGMENT OF ACTIVE VIDEO PAGE
        AX = 0039h
Return: AX = segment of active video page
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0042h,AX=00ACh
--------V-62003A-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETATTR" - GET CHARACTER ATTRIB FOR POSITION
        AX = 003Ah
        BX = row
        CX = column
Return: AX = character attribute at specified location on active video page
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in graphics modes
SeeAlso: AX=000Bh,AX=003Dh,AX=0040h,AX=00A6h
--------V-62003B-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETBANKS" - GET SVGA READ AND WRITE BANKS
        AX = 003Bh
        ES:BX -> GETBANKS variable pointer record (see #03481)
Return: nothing
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00A7h

Format of FGDRIVER GETBANKS variable pointer record:
Offset  Size    Description     (Table 03481)
 00h    WORD    segment of WORD buffer for read bank number
 02h    WORD    offset of WORD buffer for read bank number
 04h    WORD    segment of WORD buffer for write bank number
 06h    WORD    offset of WORD buffer for write bank number
--------V-62003C-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETBLOCK" - GRAB RECTANGLE OF DISPLAY
        AX = 003Ch
        ES:BX -> buffer for screen contents
        CX = leftmost column
        DX = rightmost column
        SI = top row
        DI = bottom row
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        In text modes, coordinates are character positions; in graphics modes,
          they are defined in screen space, and the left and right edges are
          adjusted to a byte boundary if necessary
        Use "FG_IMAGESIZ" (see AX=005Ch) to determine the required buffer size
SeeAlso: AX=0044h,AX=005Ch,AX=0098h
--------V-62003D-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETCHAR" - GET CHARACTER FOR SCREEN POSITION
        AX = 003Dh
        BX = row
        CX = column
Return: AX = character at specified location on active video page
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in graphics modes
SeeAlso: AX=000Bh,AX=003Ah,AX=0096h,AX=00A6h,AX=00C8h
--------V-62003E-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETCLIP" - GET CLIPPING REGION IN SCREEN SPACE
        AX = 003Eh
        ES:BX -> GETCLIP variable pointer record (see #03482)
Return: variables specifed by GETCLIP structure updated
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00CAh

Format of FGDRIVER GETCLIP variable pointer record:
Offset  Size    Description     (Table 03482)
 00h    WORD    segment of WORD buffer for minimum X coordinate (left edge)
 02h    WORD    offset of WORD buffer for minimum X coordinate (left edge)
 04h    WORD    segment of WORD buffer for maximum X coordinate (right edge)
 06h    WORD    offset of WORD buffer for maximum X coordinate (right edge)
 08h    WORD    segment of WORD buffer for minimum Y coordinate (top edge)
 0Ah    WORD    offset of WORD buffer for minimum Y coordinate (top edge)
 0Ch    WORD    segment of WORD buffer for maximum Y coordinate (bottom edge)
 0Eh    WORD    offset of WORD buffer for maximum Y coordinate (bottom edge)
--------V-62003F-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETCLOCK" - GET CLOCK TICKS SINCE MIDNIGHT
        AX = 003Fh
Return: DX:AX = number of clock ticks since midnight
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: INT 1A/AH=00h
--------V-620040-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETCOLOR" - GET CURRENT TEXT ATTRIBUTE
        AX = 0040h
Return: AX = current text attribute or color index (graphics modes)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=000Bh,AX=003Ah,AX=00A6h
--------V-620041-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETDACS" - GET VIDEO DAC CONTENTS
        AX = 0041h
        CX = number of DAC registers to return (0001h to 0100h)
        DX = starting DAC register number (0000h to 00FFh)
        ES:BX -> buffer for DAC red/green/blue triples
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The register number wraps back to zero after FFh
SeeAlso: AX=004Eh,AX=0086h,AX=00ABh
--------V-620042-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETENTRY" - GET PAGE TYPE AND ADDRESS
        AX = 0042h
        ES:BX -> variable pointer record (see #03483)
        CX = page number (00h-3Fh)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        Page addresses are segments for pages stored in conventional memory
          (including physical and virtual pages), and EMS or XMS handles for
          pages stored in EMS or XMS
SeeAlso: AX=0000h,AX=00ACh

Format of FGDRIVER GETENTRY variable pointer record:
Offset  Size    Description     (Table 03483)
 00h    WORD    segment of WORD buffer for page address
 02h    WORD    offset of WORD buffer for page address
 04h    WORD    segment of WORD buffer for page type (se #03484)
 06h    WORD    offset of WORD buffer for page type

(Table 03484)
Values for FGDRIVER page type:
 0000h  unallocated
 0001h  physical
 0002h  virtual
 0003h  logical page, stored in expanded memory (EMS)
 0004h  logical page, stored in extended memory (XMS)
 0005h  logical page, stored in conventional memory
--------V-620043-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETHPAGE" - GET CURRENT HIDDEN VIDEO PAGE NUM
        AX = 0043h
Return: AX = current hidden video page number (0000h-003Fh)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=004Ch,AX=0050h,AX=00AEh
--------V-620044-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETIMAGE" - STORE IMAGE AS BITMAP
        AX = 0044h
        ES:BX -> buffer for video mode-specific bitmap
        CX = width of bitmap in bytes
        DX = height of bitmap in pixel rows
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0011h,AX=0024h,AX=0036h,AX=0099h,AX=00A0h
--------V-620045-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETINDEX" - GET COLOR VALUE FOR COLOR INDEX
        AX = 0045h
        BX = color index (0000h to 00FFh)
Return: AX = color value for specified color index
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call returns the value passed to it in text and 256-color
          graphics modes
SeeAlso: AX=0018h,AX=0040h
--------V-620046-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETKEY" - GET NEXT KEYSTROKE
        AX = 0046h
        ES:BX -> variable pointer record (see #03485)
Return: (after next keystroke if no typeahead) variables updated
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=000Ah,AX=0063h,AX=0069h,AX=00DEh,INT 16/AH=00h

Format of FGDRIVER GETKEY variable pointer record:
Offset  Size    Description     (Table 03485)
 00h    WORD    segment of BYTE buffer for ASCII keycode
 02h    WORD    offset of BYTE buffer for ASCII keycode
 04h    WORD    segment of BYTE buffer for extended keycode
 06h    WORD    offset of BYTE buffer for extended keycode
--------V-620047-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETLINES" - GET TEXT ROWS FOR CURR VIDEO MODE
        AX = 0047h
Return: AX = number of text rows on screen in current video mode
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00AFh,AX=00C2h
--------V-620048-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETMAP" - STORE IMAGE AS MODE-INDEPENDNT BITMAP
        AX = 0048h
        ES:BX -> buffer for video mode-independent bitmap
        CX = width of bitmap in bytes
        DX = height of bitmap in pixel rows
Return: each bit in bitmap is set if corresponding pixel is of the current
          color, cleared otherwise
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes
SeeAlso: AX=0011h,AX=001Eh,AX=0024h
--------V-620049-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETMAXX" - GET MAXIMUM COLUMN IN SCREEN SPACE
        AX = 0049h
Return: AX = maximum X coordinate in screen space
            (or character space if in text mode)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=004Ah,AX=00C1h
--------V-62004A-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETMAXY" - GET MAXIMUM ROW IN SCREEN SPACE
        AX = 004Ah
Return: AX = maximum Y coordinate in screen space
                (or character space if in text mode)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0049h,AX=00C1h
--------V-62004B-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETMODE" - GET CURRENT VIDEO MODE NUMBER
        AX = 004Bh
        ES:BX -> WORD ???
Return: AX = current video mode number
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00B0h
--------V-62004C-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETPAGE" - GET ACTIVE VIDEO PAGE NUMBER
        AX = 004Ch
Return: AX = active video page (0000h-003Fh)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0039h,AX=0042h,AX=0043h,AX=0050h,AX=00B2h
--------V-62004D-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETPIXEL" - GET COLOR OF SPECIFIED PIXEL
        AX = 004Dh
        BX = column in screen space
        CX = row in screen space
Return: AX = color value of pixel (0 to num_colors-1)
            0000h in text modes
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=003Ah,AX=003Dh,AX=008Fh,AX=0090h
--------V-62004E-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETRGB" - GET VIDEO DAC REGISTER CONTENTS
        AX = 004Eh
        ES:BX -> variable pointer record (see #03486)
        CX = DAC register number
Return: variables updated
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes and CGA/EGA video modes (since
          they do not use DAC registers)
SeeAlso: AX=0041h,AX=0086h,AX=00ABh

Format of FGDRIVER GETRGB variable pointer record:
Offset  Size    Description     (Table 03486)
 00h    WORD    segment of WORD buffer for red component of DAC register
 02h    WORD    offset of WORD buffer for red component
 04h    WORD    segment of WORD buffer for green component of DAC register
 06h    WORD    offset of WORD buffer for green component
 08h    WORD    segment of WORD buffer for blue component of DAC register
 0Ah    WORD    offset of WORD buffer for blue component
--------V-62004F-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETVIEW" - GET VIEWPORT EXTREME LIMITS
        AX = 004Fh
        ES:BX -> variable pointer record (see #03487)
Return: indicated variables updated
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00B5h

Format of FGDRIVER GETVIEW variable pointer record:
Offset  Size    Description     (Table 03487)
 00h    WORD    segment of WORD buffer for viewport left edge (viewport units)
 02h    WORD    offset of WORD buffer for viewport left edge (viewport units)
 04h    WORD    segment of WORD buffer for viewport right edge (viewport units)
 06h    WORD    offset of WORD buffer for viewport right edge (viewport units)
 08h    WORD    segment of WORD buffer for viewport top edge (viewport units)
 0Ah    WORD    offset of WORD buffer for viewport top edge (viewport units)
 0Ch    WORD    segment of WORD buffer for viewport bottom edge (viewp. units)
 0Eh    WORD    offset of WORD buffer for viewport bottom edge (viewp. units)
 10h    WORD    segment of WORD buffer for viewport left edge (screen space)
 12h    WORD    offset of WORD buffer for viewport left edge (screen space)
 14h    WORD    segment of WORD buffer for viewport right edge (screen space)
 16h    WORD    offset of WORD buffer for viewport right edge (screen space)
 18h    WORD    segment of WORD buffer for viewport top edge (screen space)
 1Ah    WORD    offset of WORD buffer for viewport top edge (screen space)
 1Ch    WORD    segment of WORD buffer for viewport bottom edge (screen space)
 1Eh    WORD    offset of WORD buffer for viewport bottom edge (screen space)
--------V-620050-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETVPAGE" - GET VISIBLE VIDEO PAGE NUMBER
        AX = 0050h
Return: AX = visible video page (0000h-003Fh)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0043h,AX=004Ch,AX=00B6h
--------V-620051-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETXBOX" - GET WIDTH OF VERTICAL BOX LINES
        AX = 0051h
Return: AX = width (in pixels) of left and right edges of rectangles
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0006h,AX=0007h,AX=0008h,AX=006Bh
--------V-620052-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETXJOY" - GET HORIZONTAL POSITION OF JOYSTICK
        AX = 0052h
        BX = joystick number (0001h or 0002h)
Return: AX = horizontal position of joystick
            FFFFh if joystick uninitialized or not present
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The actual coordinates are processor- and joystick-dependent
        You must call "FG_INITJOY" (AX=005Eh) before using this function
SeeAlso: AX=0009h,AX=0056h,AX=005Eh,AX=0062h,AX=0077h
--------V-620053-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETXJUST" - GET HORIZONTAL JUSTIFICATION
        AX = 0053h
Return: AX = string justification
            0000h strings are centered around current graphics X position
            0001h strings are right-justified at current graphics X position
            FFFFh strings are left-justified at current graphics X position
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=006Ch,AX=007Bh
--------V-620054-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETXPOS" - GET GRAPHICS CURSOR COLUMN
        AX = 0054h
Return: AX = screen space X coordinate of graphics cursor position
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0058h,AX=007Eh,AX=007Fh
--------V-620055-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETYBOX" - GET WIDTH OF HORIZONTAL BOX LINES
        AX = 0055h
Return: AX = width (in pixels) of top and bottom edges of rectangles
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0006h,AX=0007h,AX=0008h,AX=0063h
--------V-620056-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETYJOY" - GET VERTICAL POSITION OF JOYSTICK
        AX = 0056h
        BX = joystick number (0001h or 0002h)
Return: AX = vertical position of joystick
            FFFFh if joystick uninitialized or not present
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The actual coordinates are processor- and joystick-dependent
        You must call "FG_INITJOY" (AX=005Eh) before using this function
SeeAlso: AX=0009h,AX=0052h,AX=005Eh,AX=0062h,AX=0077h
--------V-620057-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETYJUST" - GET VERTICAL JUSTIFICATION
        AX = 0057h
Return: AX = string justification
            0000h strings are centered around current graphics Y position
            0001h strings have top edge at current graphics Y position
            FFFFh strings have bottom edge at current graphics Y position
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0053h,AX=0065h
--------V-620058-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_GETYPOS" - GET GRAPHICS CURSOR ROW
        AX = 0058h
Return: AX = screen space Y coordinate of graphics cursor position
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0054h,AX=007Eh,AX=007Fh
--------V-620059-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_HUSH" - STOP ASYNCHRONOUS SOUND IMMEDIATELY
        AX = 0059h
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function immediately stops any sounds started with "FG_MUSICB",
          "FG_SOUNDS", or "FG_VOICES"; it is ignored if no asynchronous sound
          is playing
SeeAlso: AX=005Ah,AX=0081h,AX=00BDh,AX=00DCh
--------V-62005A-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_HUSHNEXT" - STOP ASYNCHRONOUS SOUND
        AX = 005Ah
Program: FGDRIVER is the external video driver for the shareware
          Fastgraph/Light by Ted Gruber Software
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function stops any sounds started with "FG_MUSICB", "FG_SOUNDS",
          or "FG_VOICES" after the current repetition completes; it is ignored
          unless asynchronous sound is continuous
SeeAlso: AX=0059h,AX=0081h,AX=00BDh,AX=00DCh
--------V-62005B-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_IMAGEBUF" - SPECIFY TEMPORARY IMAGE BUFFER
        AX = 005Bh
        ES:BX -> buffer to be used when creating or displaying GIF/PCX/PPR/SPR
                  images
        CX = size of buffer in bytes or 0000h to use internal buffer
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        Fastgraph's internal buffer is 4096 bytes; this function allows the
          application to define a larger buffer which will typically speed
          processing
SeeAlso: AX=006Ch,AX=006Dh,AX=006Eh,AX=00B9h,AX=00BAh,AX=00BBh
--------V-62005C-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_IMAGESIZ" - DETERMINE IMAGE STORAGE REQUIREMENT
        AX = 005Ch
        BX = image width in pixels
        CX = image height in pixels
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
Return: DX:AX = size in bytes of mode-specific bitmap for current video mode
SeeAlso: AX=003Ch,AX=0098h
--------V-62005D-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_INITEMS" - INITIALIZE EXPANDED MEMORY USE
        AX = 005Dh
Return: AX = status
            0000h successful
            FFFFh expanded memory manager inaccessible or not installed
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0002h,AX=0060h"v4.02"
--------V-62005E-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_INITJOY" - INITIALIZE JOYSTICK USE
        AX = 005Eh
        BX = joystick number (0001h or 0002h)
Return: AX = status
            0000h successful
            FFFFh joystick not connected or no game port
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        Fastgraph assumes that the requested joystick is centered at the time
          this function is called
SeeAlso: AX=0009h,AX=0052h,AX=0056h,AX=0062h,AX=0077h
--------V-62005F-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_INITPM"??? - (NOT IMPLEMENTED)
        AX = 005Fh
        ???
Return: ???
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
--------V-620060-----------------------------
INT 62 u - FGDRIVER v1.10 only - "FG_DISPPCX" - DISPLAY PCX FILE
        AX = 0060h
        ES:BX -> ASCIZ filename
        CX = flags
            bit 0: use current palette rather than PCX file's palette
            bits 1-15 reserved (0)
Return: AX = status
            0000h success
            0001h file not found
            0002h file is not a valid PCX file
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes and Hercules low-resolution graphics
        The image is displayed with its upper left corner at the current
          graphics cursor position
SeeAlso: AX=00B9h
--------V-620060-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_INITXMS" - INITIALIZE EXTENDED MEMORY USE
        AX = 0060h
Return: AX = status
            0000h successful
            FFFFh extended memory manager inaccessible or not installed
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0003h,AX=005Dh
--------V-620061-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_INSIDE" - CHECK IF POINT INSIDE CONVEX POLYGON
        AX = 0061h
        ES:BX -> vertex array
        CX = number of vertices
        DX = screen space column of point to test
        SI = screen space row of point to test
Return: AX = result
            0000h point is outside polygon
            0001h point is inside polygon
            undefined if not a convex polygon
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0092h,AX=0093h,AX=0094h
--------V-620062-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_INTJOY" - GET KEYCODES CORRESP TO JOYSTICK POS
        AX = 0062h
        CX = joystick number (0001h or 0002h)
        ES:BX -> variable pointer record (see #03488)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        If the indicated joystick has not been initialized with AX=008Eh, both
          the button code and joystick position will be set to 00h
        If either button is pressed, a button code of 0Dh is returned;
          otherwise, a button code of 00h is returned
SeeAlso: AX=0009h,AX=0052h,AX=0046h,AX=005Eh,AX=0077h

Format of FGDRIVER INTJOY variable pointer record:
Offset  Size    Description     (Table 03488)
 00h    WORD    segment of BYTE buffer for button code
 02h    WORD    offset of BYTE buffer for button code
 04h    WORD    segment of BYTE buffer for joystick position
 06h    WORD    offset of BYTE buffer for joystick position
--------V-620063-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_INTKEY" - GET KEYSTROKE, NO WAIT
        AX = 0063h
        ES:BX -> variable pointer record (see #03489)
Return: variables updated
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        If the keyboard buffer is empty, both the ASCII and extended keycodes
          are set to 00h
SeeAlso: AX=000Ah,AX=0046h,AX=0069h,AX=00DEh,INT 16/AH=01h

Format of FGDRIVER INTKEY variable pointer record:
Offset  Size    Description     (Table 03489)
 00h    WORD    segment of BYTE buffer for ASCII keycode
 02h    WORD    offset of BYTE buffer for ASCII keycode
 04h    WORD    segment of BYTE buffer for extended keycode
 06h    WORD    offset of BYTE buffer for extended keycode
--------V-620064-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_INVERT" - INVERT ORIENTATION OF BITMAP
        AX = 0064h
        ES:BX -> bitmap
        CX = width of bitmap in bytes
        DX = height of bitmap in pixel rows
Return: nothing
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
--------V-620065-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_JUSTIFY" - SET TEXT OUTPUT JUSTIFICATION
        AX = 0065h
        BX = horizontal justification
              (00h centered, 01h right-justified, FFh left-justified)
        CX = vertical justification
              (00h centered, 01h top of characters, FFh bottom of chars)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=000Ch,AX=0037h,AX=0053h,AX=0057h,AX=0096h
--------V-620066-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_KBINIT" - ENABLE/DISABLE LOW-LEVEL KBD HANDLER
        AX = 0066h
        BX = new state (0000h disabled, 0001h enabled)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        When the low-level handler is enabled, "FG_GETKEY", "FG_INTKEY",
          "FG_WAITKEY", and all other functions calling DOS or BIOS keyboard
          services become unavailable
SeeAlso: AX=0067h,AX=0068h,AX=0069h
--------V-620067-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_KBLAST" - GET MOST RECENT SCANCODE PROCESSED
        AX = 0067h
Return: AX = scancode for keypress most recently processed by FastGraph's
              low-level keyboard handler, or 0000h if no keys since FG_KBINIT
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0066h,AX=0068h,AX=0069h
--------V-620068-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_KBRESET" - RESET LOW-LEVEL KEYBOARD HANDLER
        AX = 0068h
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0066h,AX=0067h,AX=0069h
--------V-620069-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_KBTEST" - CHECK WHETHER SPECIFIED KEY PRESSED
        AX = 0069h
        BX = scan code of desired key
Return: AX = state
            0000h key is not pressed
            0001h key is currently pressed
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The low-level keyboard handler must have been enabled with AX=0066h
SeeAlso: AX=0066h,AX=0067h,INT 16/AH=01h
--------V-62006A-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_LOADPCX" - LOAD .PCX INTO ACTIVE VIRTUAL BUFFER
        AX = 006Ah
        ES:BX -> ASCIZ filename for PCX image
        CX = control flags
            bit 0: use current palette, overriding stored .PCX palette
            bit 1: load at current graphics position, not stored position
            bit 2: load image from FG_IMAGEBUF buffer instead of .PCX file
Return: AX = status
            0000h successful
            0001h file not found
            0002h not a .PCX file
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=006Ch,AX=00B9h,AX=00D5h
--------V-62006B-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_LOCATE" - SET TEXT-MODE CURSOR POSITION
        AX = 006Bh
        BX = row
        CX = column
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        There are only eight text cursors shared by successive groups of
          eight video pages (pages 0, 8, 16, ... share one cursor, 1, 9, ...
          share the second, etc)
SeeAlso: AX=0054h,AX=0058h,AX=007Eh,AX=00E0h
--------V-62006C-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MAKEPCX" - CREATE PCX FILE FROM SCREEN WINDOW
        AX = 006Ch
        BX = left edge in screen space units
        CX = right edge in screen space units
        DX = top edge in screen space units
        SI = bottom edge in screen space units
        ES:DI -> ASCIZ filename of PCX file to create
Return: AX = status
            0000h successful
            0001h file not created
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The PCX file is created from the specified region of the active video
          page; the left and right edges are adjusted to a byte boundary if
          necessary
        If the specified file already exists, it is overwritten
        This call is ignored in text and Hercules low-resolution graphics modes
SeeAlso: AX=005Bh,AX=006Dh,AX=006Ah,AX=006Eh,AX=00B9h,AX=00BAh,AX=00BBh
--------V-62006D-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MAKEPPR" - CREATE PACKED PIXEL RUN FILE
        AX = 006Dh
        BX = left edge in screen space units
        CX = right edge in screen space units
        DX = top edge in screen space units
        SI = bottom edge in screen space units
        ES:DI -> ASCIZ filename of PPR file to create
Return: AX = status
            0000h successful
            0001h file not created
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The PPR file is created from the specified region of the active video
          page; the left and right edges are adjusted to byte boundaries if
          necessary
        If the specified file already exists, it is overwritten
        This call is ignored in text modes
SeeAlso: AX=005Bh,AX=006Ch,AX=006Eh,AX=00B9h,AX=00BAh,AX=00BBh
--------V-62006E-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MAKESPR" - CREATE STANDARD PIXEL RUN FILE
        AX = 006Eh
        BX = left edge in screen space units
        CX = right edge in screen space units
        DX = top edge in screen space units
        SI = bottom edge in screen space units
        ES:DI -> ASCIZ filename of SPR file to create
Return: AX = status
            0000h successful
            0001h file not created
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The SPR file is created from the specified region of the active video
          page; the left and right edges are adjusted to byte boundaries if
          necessary
        If the specified file already exists, it is overwritten
        This call is ignored in text modes
SeeAlso: AX=005Bh,AX=006Ch,AX=006Dh,AX=00B9h,AX=00BAh,AX=00BBh
--------V-62006F-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MAPRGB" - MAP COLOR COMPONENTS INTO PALETTE VAL
        AX = 006Fh
        BX = red component
        CX = green component
        DX = blue component
Return: AX = mode-specific palette value corresponding to specified components
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function is only meaningful in 16-color graphics modes
SeeAlso: AX=004Eh,AX=00B3h
--------V-620070-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MEASURE" - GET DELAY UNITS PER CLOCK TICK
        AX = 0070h
Return: AX = delay units per clock tick (processor-dependent)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        These delay units are used by "FG_STALL" (see AX=00BFh)
SeeAlso: AX=00BFh
--------V-620071-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MEMAVAIL" - QUERY AMOUNT OF FREE MEMORY
        AX = 0071h
Return: DX:AX = number of bytes of conventional memory available
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=005Dh,AX=0072h
--------V-620072-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MEMORY" - GET SIZE OF VIDEO MEMORY
        AX = 0072h
Return: AX = size of video memory in KB
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        You must first call "FG_SVGAINIT" (see AX=00C1h) before using this
          function
SeeAlso: AX=0071h
--------V-620073-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MOUSE256" - DEFINE 256-COLOR MOUSE CURSOR
        AX = 0073h
        ES:BX -> 512-byte cursor definition
        CX = X offset of hot-spot within mouse cursor
        DX = Y offset of hot-spot within mouse cursor
Return: nothing
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        the cursor definition array consists of 256 bytes defining the 16x16
          screen mask, followed by another 256 bytes definining the 16x16
          cursor mask
SeeAlso: AX=0074h,AX=0075h,AX=007Bh
--------V-620074-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MOUSEBUT" - GET MOUSE BUTTON PRESS/RELEASE CNTS
        AX = 0074h
        CX = mouse button (1 = left press, 2 = right press, 3 = middle press,
                  -1=left release, -2=right release, -3=middle release)
        ES:BX -> variable pointer record (see #03490)
Return: variables updated
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function returns the count of presses or releases since the last
          call to this function; if the count is zero, row and column will
          also be zero
SeeAlso: AX=0075h,AX=0077h,AX=007Ah

Format of FGDRIVER MOUSEBUT variable pointer record:
Offset  Size    Description     (Table 03490)
 00h    WORD    segment of WORD buffer for press/release count
 02h    WORD    offset of WORD buffer for press/release count
 04h    WORD    segment of WORD buffer for screen space col of last press/rls
 06h    WORD    offset of WORD buffer for screen space col of last press/rels
 08h    WORD    segment of WORD buffer for screen space row of last press/rls
 0Ah    WORD    offset of WORD buffer for screen space row of last press/rls
--------V-620075-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MOUSECUR" - SPECIFY TEXT-MODE MOUSE CURSOR
        AX = 0075h
        BX = screen mask
        CX = cursor mask
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in graphics modes
SeeAlso: AX=007Bh,AX=007Dh
--------V-620076-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MOUSEFIN" - UNHOOK FASTGRAPH MOUSE HANDLER
        AX = 0076h
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function should be called before switching back to text mode if
          "FG_MOUSEINI" was called while in an SVGA graphics mode
SeeAlso: AX=0077h
--------V-620077-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MOUSEINI" - INITIALIZE MOUSE SUPPORT
        AX = 0077h
Return: AX = status
            0002h two-button mouse
            0003h three-button mouse
            FFFFh initialization failed
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        After this call, the mouse cursor is invisible
SeeAlso: AX=0076h,AX=0078h,AX=007Ch
--------V-620078-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MOUSELIM" - SPECIFY MOUSE CURSOR LIMITS
        AX = 0078h
        BX = left-most position allowed for mouse cursor
        CX = right-most position allowed
        DX = top-most position allowed
        SI = bottom-most position allowed
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0077h,AX=0079h,INT 33/AX=0007h,INT 33/AX=0008h
--------V-620079-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MOUSEMOV" - SET MOUSE CURSOR POSITION
        AX = 0079h
        BX = new column
        CX = new row
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function will not move the mouse cursor outside the bounding box
          specified with AX=009Bh
SeeAlso: AX=0078h,AX=007Ah,INT 33/AX=0004h
--------V-62007A-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MOUSEPOS" - GET CURRENT MOUSE POSITION
        AX = 007Ah
        ES:BX -> variable pointer record (see #03491)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0079h

Format of FGDRIVER MOUSEPOS variable pointer record:
Offset  Size    Description     (Table 03491)
 00h    WORD    segment of WORD buffer for mouse column
 02h    WORD    offset of WORD buffer for mouse column
 04h    WORD    segment of WORD buffer for mouse row
 06h    WORD    offset of WORD buffer for mouse row
 08h    WORD    segment of WORD buffer for button status
 0Ah    WORD    offset of WORD buffer for button status
Note:   button status: bit 0 = left button, bit 1 = right, bit 2 = middle
--------V-62007B-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MOUSEPTR" - SPECIFY GRAPH-MODE MOUSE CURSOR
        AX = 007Bh
        ES:BX -> masks (16-byte screen mask followed by 16-byte cursor mask)
        CX = X offset of hot spot from upper left corner
        DX = Y offset of hot spot from upper left corner
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes
SeeAlso: AX=0073h,AX=0075h,INT 33/AX=0009h
--------V-62007C-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MOUSESPD" - SET MOUSE CURSOR SPEED
        AX = 007Ch
        BX = horizontal mickeys per eight pixels of movement (default 16)
        CX = vertical mickeys per eight pixels of movement (default 16)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: INT 33/AX=000Fh,INT 33/AX=001Ah
--------V-62007D-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MOUSEVIS" - SET MOUSE CURSOR VISIBILITY
        AX = 007Dh
        BX = new state (0000h invisible, 0001h visible)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0077h,INT 33/AX=0001h,INT 33/AX=0002h
--------V-62007E-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MOVE" - SET GRAPHICS CURSOR POSITION
        AX = 007Eh
        BX = new column
        CX = new row
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes
SeeAlso: AX=0054h,AX=0058h,AX=006Bh,AX=0079h,AX=007Fh,AX=00E0h
--------V-62007F-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MOVEREL" - ADJUST GRAPHICS CURSOR POSITION
        AX = 007Fh
        BX = column offset
        CX = row offset
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes
SeeAlso: AX=0054h,AX=0058h,AX=007Eh
--------V-620080-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MUSIC" - PLAY SERIES OF NOTES
        AX = 0080h
        ES:BX -> '$'-terminated music string in BASIC PLAY format
Return: after music completed
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored if asynchronous sound (AX=00A5h,AX=00A8h,
          AX=00AAh) is already in progress
SeeAlso: AX=0081h,AX=00BCh,AX=00DBh
--------V-620081-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_MUSICB" - PLAY SERIES OF NOTES IN BACKGROUND
        AX = 0081h
        CX = number of repetitions (negative = continuous play)
        ES:BX -> '$'-terminated music string in BASIC PLAY format
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored if asynchronous sound (AX=00A5h,AX=00A8h,
          AX=00AAh) is already in progress
SeeAlso: AX=0059h,AX=0081h,AX=00BDh,AX=00DCh
--------V-620082-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_NUMLOCK" - GET STATE OF NUMLOCK KEY
        AX = 0082h
Return: AX = NumLock state (0000h off, 0001h on)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=000Ah,AX=00A4h,AX=00A8h,AX=00B1h
--------V-620083-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_PACK" - CONVERT PIXEL-PER-BYTE TO PACKED BITMAP
        AX = 0083h
        ES:BX -> variable pointer record (see #03492)
        CX = width of bitmap in pixels
        DX = height of bitmap in pixels
Return: result bitmap buffer updated
SeeAlso: AX=00CBh

Format of FGDRIVER PACK variable pointer record:
Offset  Size    Description     (Table 03492)
 00h    WORD    segment of source (mode-independent) bitmap
 02h    WORD    offset of source (mode-independent) bitmap
 04h    WORD    segment of buffer for result (mode-specific) bitmap
 06h    WORD    offset of buffer for result (mode-specific) bitmap
--------V-620084-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_PAGESIZE" - GET VIDEO PAGE SIZE FOR CURR MODE
        AX = 0084h
Return: DX:AX = page size in bytes
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0072h
--------V-620085-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_PAINT" - FLOOD CLOSED REGION WITH COLOR
        AX = 0085h
        BX = column
        CX = row
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function fills an arbitrary closed region around the specified
          point with the current color; the screen edges are not considered
          region boundaries
        This call is ignored in text modes
SeeAlso: AX=0035h
--------V-620086-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_PALETTE" - SET PALETTE / SET VIDEO DAC REGISTER
        AX = 0086h
---CGA 4-color graphics---
        BX = CGA paletee number
        CX = background color
---CGA 2-color graphics---
        BX ignored
        CX = foreground color
---16-color graphics---
        BX = palette register number
        CX = palette value
---256-color graphics---
        BX = DAC register number
        CX =  DAC value
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function is ignored in text modes and Hercules graphics modes
        Few EGA/VGA adapters correctly set the foreground color in CGA mode 6
SeeAlso: AX=0041h,AX=004Eh,AX=0087h,AX=00ABh
--------V-620087-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_PALETTES" - SET ALL PALETTE REGISTERS
        AX = 0087h
        ES:BX -> array of 16 WORDs containing values for palette registers
                  (or first 16 DAC registers in 256-color modes)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function is ignored in text modes, CGA and Hercules graphics modes
SeeAlso: AX=0041h,AX=004Eh,AX=0086h,AX=00ABh
--------V-620088-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_PAN" - SET SCREEN ORIGIN
        AX = 0088h
        BX = new column for screen origin
        CX = new row for screen origin
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00B2h
--------V-620089-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_PATTERN" - SPECIFY DISPLAY PATTERN FOR COLOR
        AX = 0089h
        BX = index of pattern to define
        CX = number of predefined display pattern
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        When displaying a pixel run map, Fastgraph uses the pattern associated
          with each color index rather than displaying the actual color
        This call has no effect in text and 256-color graphics modes
SeeAlso: AX=0023h,AX=0045h
--------V-62008A-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_PCXHEAD" - GET PCX FILE HEADER
        AX = 008Ah
        ES:BX -> variable pointer record (see #03493)
Return: AX = status
            0000h successful
            FFFEh not a PCX file
            FFFFh file does not exist
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=008Bh,AX=00B9h

Format of FGDRIVER PCXHEAD variable pointer record:
Offset  Size    Description     (Table 03493)
 00h    WORD    segment of ASCIZ filename
 02h    WORD    offset of ASCIZ filename
 04h    WORD    segment of 128-byte buffer for PCX header
 06h    WORD    offset of 128-byte buffer for PCX header
--------V-62008B-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_PCXMODE" - GET OPTIMAL VIDEO MODE FOR DISPLAY
        AX = 008Bh
        ES:BX -> PCX header (see AX=008Ah)
Return: AX = optimal video mode for PCX file
            FFFEh not a valid PCX header
            FFFFh unable to determine compatible video mode
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=008Ah,AX=00B9h
--------V-62008C-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_PCXPAL" - GET PALETTE STORED IN PCX FILE
        AX = 008Ch
        ES:BX -> variable pointer record (see #03494)
Return: AX = number of colors in palette (16 or 256) or
            FFFEh not a valid PCX file
            FFFFh file not found
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=008Dh

Format of FGDRIVER PCXPAL variable pointer record:
Offset  Size    Description     (Table 03494)
 00h    WORD    segment of ASCIZ .PCX filename
 02h    WORD    offset of ASCIZ .PCX filename
 04h    WORD    segment of buffer for .PCX palette RGB triples
 06h    WORD    offset of buffer for .PCX palette RGB triples
Note:   the buffer for the palette must hold at least three times as many bytes
          as there are colors in the palette
SeeAlso: #03495
--------V-62008D-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_PCXRANGE" - GET EXTENT OF PCX IMAGE
        AX = 008Dh
        ES:BX -> variable pointer record (see #03495)
Return: indicated variables updated; if the indicated header is not valid,
          all of the coordinate variables are set to FFFFh
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=008Ch

Format of FGDRIVER PCXRANGE variable pointer record:
Offset  Size    Description     (Table 03495)
 00h    WORD    segment of 128-byte PCX file header
 02h    WORD    offset of 128-byte PCX file header
 04h    WORD    segment of WORD buffer for X coordinate of image's left edge
 04h    WORD    offset of WORD buffer for X coordinate of image's left edge
 08h    WORD    segment of WORD buffer for X coordinate of image's right edge
 0Ah    WORD    offset of WORD buffer for X coordinate of image's right edge
 0Ch    WORD    segment of WORD buffer for Y coordinate of image's top edge
 0Eh    WORD    offset of WORD buffer for Y coordinate of image's top edge
 10h    WORD    segment of WORD buffer for X coordinate of image's bottom edge
 12h    WORD    offset of WORD buffer for X coordinate of image's bottom edge
SeeAlso: #03494
--------V-62008E-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_PLAYING" - DETERMINE WHETHER ASYNC SOUND ACTIVE
        AX = 008Eh
Return: AX = sound state (0 = no asynchronous sound, 1 = async sound playing)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0059h,AX=0081h,AX=00BDh,AX=00DCh
--------V-62008F-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_POINT" - DISPLAY A PIXEL
        AX = 008Fh
        BX = column
        CX = row
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes
SeeAlso: AX=0006h,AX=001Dh,AX=004Dh,AX=0090h
--------V-620090-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_POINTX" - DISPLAY A PIXEL IN XOR MODE
        AX = 0090h
        BX = column
        CX = row
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes
SeeAlso: AX=004Dh,AX=008Fh
--------V-620091-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_POLYEDGE" - SPECIFY INCLUSION OF FINAL PIXELS
        AX = 0091h
        BX = edge flag
            0000h include right- and bottom-edge pixels when drawing polygons
                  with FG_POLYFILL
            0001h (default) exclue right- and bottom-edge pixels
SeeAlso: AX=0092h
--------V-620092-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_POLYFILL" - DRAW A FILLED CONVEX POLYGON
        AX = 0092h
        CX = number of vertices
        ES:BX -> variable pointer record (see #03496)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The vertex array consists of pairs of words specifying the X and Y
          coordinates of each vertex; the work array is used internally and
          must contain at least four times as many bytes as the polygon is
          high in pixels
        This function is ignored in text modes
        If the polygon is non-convex, only a portion of it may be filled
SeeAlso: AX=000Eh,AX=0027h,AX=0091h,AX=0093h,AX=0094h,AX=0095h

Format of FGDRIVER POLYFILL variable pointer record:
Offset  Size    Description     (Table 03496)
 00h    WORD    segment of vertex array (see #03498)
 02h    WORD    offset of vertex array
 04h    WORD    segment of work array
 06h    WORD    offset of work array
SeeAlso: #03497
--------V-620093-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_POLYGON" - DRAW AN UNFILLED POLYGON
        AX = 0093h
        CX = number of vertices in polygon
        ES:BX -> variable pointer record (see #03497)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes
SeeAlso: AX=0091h,AX=0092h,AX=0094h,AX=0095h

Format of FGDRIVER POLYGON variable pointer record:
Offset  Size    Description     (Table 03497)
 00h    WORD    segment of WORD array containing vertex columns
 02h    WORD    offset of WORD array containing vertex columns
 04h    WORD    segment of WORD array containing vertex rows
 06h    WORD    offset of WORD array containing vertex rows
SeeAlso: #03496
--------V-620094-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_POLYLINE" - DRAW AN UNFILLED POLYGON
        AX = 0094h
        CX = number of vertices in polygon
        ES:BX -> vertex array (see #03498)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function is equivalent to "FG_POLYGON", but uses only a single
          array to define the vertices
        This call is ignored in text modes
SeeAlso: AX=008Fh,AX=0092h,AX=0093h,AX=0095h

Format of FGDRIVER POLYFILL/POLYLINE vertex array element:
Offset  Size    Description     (Table 03498)
 00h    WORD    column
 02h    WORD    row
SeeAlso: #03497
--------V-620095-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_POLYOFF" - DEFINE POLYGON DRAWING OFFSET
        AX = 0095h
        BX = horizontal offset (default 0)
        CX = vertical offset (default 0)
Desc:   define the offsets applied to all vertices of polygons drawn with
          "FG_POLYFILL" or "FG_POLYLINE"
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0092h,AX=0094h
--------V-620096-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_PRINT" - DISPLAY STRING OF HARDWARE CHARACTERS
        AX = 0096h
        CX = length of string
        ES:BX -> string to display
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The string is displayed in the current color, and the graphics cursor
          is updated to be just to the right of the last displayed character
        This function is ignored in text modes
SeeAlso: AX=000Ch,AX=0037h,AX=0065h,AX=0097h
--------V-620097-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_PRINTC" - DISPLAY STRING OF HW CHARS (CLIPPED)
        AX = 0097h
        CX = length of string
        ES:BX -> string to display
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The string is displayed in the current color, and the graphics cursor
          is updated to be just to the right of the last displayed character;
          only the portion of the string that lies within the current clipping
          area is displayed
        This function is ignored in text modes
SeeAlso: AX=0096h
--------V-620098-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_PUTBLOCK" - RESTORE RECTANGLE OF DISPLAY
        AX = 0098h
        ES:BX -> buffer containing previously-saved image
        CX = left edge
        DX = right edge
        SI = top edge
        DI = bottom edge
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        In text modes, coordinates are character positions; in graphics modes,
          they are defined in screen space, and the left and right edges are
          adjusted to a byte boundary if necessary
SeeAlso: AX=003Ch,AX=0099h
--------V-620099-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_PUTIMAGE" - DISPLAY MODE-SPECIFIC BITMAP IMAGE
        AX = 0099h
        ES:BX -> buffer containing mode-specific bitmap
        CX = width in bytes
        DX = height in pixel rows
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The bitmap is displayed with its lower left corner at the graphics
          cursor position; color 0 is NOT treated as transparent
SeeAlso: AX=0011h,AX=0024h,AX=0036h,AX=0044h,AX=0098h
--------V-62009A-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_QUIET" - STOP CONTINUOUS SYNCHRONOUS SOUND
        AX = 009Ah
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call has no effect if there is no continuous sound playing
SeeAlso: AX=0059h,AX=0080h,AX=00BDh,AX=00DCh
--------V-62009B-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_RECT" - DRAW UNFILLED RECTANGLE IN SCREEN SPACE
        AX = 009Bh
        BX = left edge column
        CX = right edge column
        DX = top edge row
        SI = bottom edge row
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0006h,AX=0012h,AX=0023h,AX=003Ch
--------V-62009C-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_RESET" - ERASE SCREEN AND RESTORE SCREEN ATTR
        AX = 009Ch
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in graphics modes
        The screen attributes are only restored if ANSI.SYS is loaded
SeeAlso: AX=0028h,AX=00B0h
--------V-62009D-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_RESIZE" - SET GRAPHICS MODE VIDEO PAGE SIZE
        AX = 009Dh
        BX = new page width in pixels
        CX = new page height in pixels
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The visible page must be set to 0000h before making this call
        The mouse, joysticks, expanded memory, and extended memory must be
          reinitialized after this call
SeeAlso: AX=0084h,AX=00ACh
--------V-62009E-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_RESTORE" - COPY REGION FROM HIDDEN TO VIS PAGE
        AX = 009Eh
        BX = left edge column
        CX = right edge column
        DX = top edge row
        SI = bottom edge row
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The left and right edges are adjusted to byte boundaries if necessary
SeeAlso: AX=00A2h,AX=00C6h
--------V-62009F-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_RESUME" - RESTART ASYNCHRONOUS SOUND
        AX = 009Fh
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00BDh,AX=00C0h
--------V-6200A0-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_REVIMAGE" - DISPLAY REVERSED IMAGE (BITMAP)
        AX = 00A0h
        ES:BX -> mode-specific bitmap
        CX = width of bitmap in bytes
        DX = height of bitmap in pixel rows
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes
        The image is drawn with its lower left corner at the current graphics
          cursor position
SeeAlso: AX=0011h,AX=0024h,AX=0036h,AX=0044h,AX=00A1h,AX=00A9h,AX=00B9h
--------V-6200A1-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_REVMASK" - DISPLAY REVERSED IMAGE (MASKING MAP)
        AX = 00A1h
        ES:BX -> array containing image stored as a masking map (see #03475)
        CX = number of pixel runs in masking map
        DX = width of masking map in pixels
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes and in native EGA and VGA graphics
          modes
        The image is drawn with its lower left corner at the current graphics
          cursor position
SeeAlso: AX=0010h,AX=001Fh,AX=0034h,AX=00A0h,AX=00A9h,AX=00C5h
--------V-6200A2-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SAVE" - COPY REGION FROM VISIBLE TO HIDDEN PAGE
        AX = 00A2h
        BX = left edge column
        CX = right edge column
        DX = top edge row
        SI = bottom edge row
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The left and right edges are adjusted to byte boundaries if necessary
SeeAlso: AX=009Eh,AX=00C6h
--------V-6200A3-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SCALE" - SCALE BITMAP
        AX = 00A3h
        ES:BX -> variable pointer record (see #03499)
        CX = width of source bitmap in pixels (0 < width <= 1024)
        DX = height of source bitmap in pixels (0 < height <= 1024)
        SI = desired width of scaled bitmap (0 < width <= 1024)
        DI = desired height of scaled bitmap (0 < height <= 1024)
Return: nothing
SeeAlso: AX=00B7h

Format of FGDRIVER SCALE variable pointer record:
Offset  Size    Description     (Table 03499)
 00h    WORD    segment of source bitmap (one pixel per byte)
 02h    WORD    offset of source bitmap
 04h    WORD    segment of buffer for resulting scaled bitmap
 06h    WORD    offset of buffer for resulting scaled bitmap
--------V-6200A4-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SCRLOCK" - GET STATE OF SCROLL LOCK KEY
        AX = 00A4h
Return: AX = ScrollLock state (0000h off, 0001h on)
Program: FGDRIVER is the external video driver for the shareware
          Fastgraph/Light by Ted Gruber Software
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=000Ah,AX=0082h,AX=00A8h,AX=00B1h
--------V-6200A5-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SCROLL" - VERTICALLY SCROLL SCREEN REGION
        AX = 00A5h
        BX = left edge column
        CX = right edge column
        DX = top edge row
        SI = bottom edge row
        DI = number of pixels by which to scroll (positive scrolls up,
              negative scrolls down)
        ES = type of scroll
            0000h circular (rows scrolled off are copied to vacated rows)
            else vacated rows are filled with the current color
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        In graphics modes, the left and right edges are adjusted to byte
          boundaries if necessary
        Circular scrolling uses part of the hidden page as a workspace
SeeAlso: AX=0088h,AX=00B2h
--------V-6200A6-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SETATTR" - SET TEXT-MODE CHARACTER ATTRIBUTE
        AX = 00A6h
        BX = foreground
        CX = background
        DX = blink (0000h nonblinking, 0001h blink)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in graphics modes
SeeAlso: AX=000Bh,AX=003Ah,AX=0048h
--------V-6200A7-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SETBANKS" - SET SVGA READ AND WRITE BANKS
        AX = 00A7h
        BX = memory bank from which to read (FFFFh leave unchanged)
        CX = memory bank to which to write (FFFFh leave unchanged)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=003Bh
--------V-6200A8-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SETCAPS" - SET STATE OF CAPSLOCK KEY
        AX = 00A8h
        BX = new state (0000h off, 0001h on)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=000Ah,AX=0082h,AX=00A4h,AX=00B1h
--------V-6200A9-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SETCLIP" - SET CLIPPING REGION
        AX = 00A9h
        BX = left edge of clipping region
        CX = right edge of clipping region
        DX = top edge of clipping region
        SI = bottom edge of clipping region
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0010h,AX=001Fh,AX=0034h,AX=003Eh,AX=00A1h,AX=00C5h
--------V-6200AA-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SETCOLOR" - SET CURRENT COLOR
        AX = 00AAh
        BX = new color index (or text attribute in text modes)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0018h,AX=0040h,AX=0045h
--------V-6200AB-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SETDACS" - SET VIDEO DAC CONTENTS
        AX = 00ABh
        CX = number of DAC registers to set (0001h to 0100h)
        DX = starting DAC register number (0000h to 00FFh)
        ES:BX -> buffer containing DAC red/green/blue triples
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The register number wraps back to zero after reaching FFh
        This call has no effect in text modes or graphics modes below 11h
SeeAlso: AX=0041h,AX=004Eh,AX=0086h,INT 10/AX=1012h
--------V-6200AC-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SETENTRY" - SET TYPE AND ADDRESS OF VIDEO PAGE
        AX = 00ACh
        BX = page number (00h-3Fh)
        CX = page address
        DX = page type (see #03484 at AX=0042h)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0038h,AX=0042h,AX=00B0h
--------V-6200AD-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SETFUNC" - SET LOGICAL OPERATION FOR VIDEO OPS
        AX = 00ADh
        BX = operation
            0000h replacement
            0001h AND
            0002h OR
            0003h XOR
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function is only available in native EGA/VGA graphics modes
          (0Dh to 12h)
SeeAlso: AX=001Eh,AX=008Fh
--------V-6200AE-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SETHPAGE" - SET HIDDEN VIDEO PAGE
        AX = 00AEh
        BX = new hidden page (0000h to 003Fh)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The specified page must be a physical page or a virtual page
SeeAlso: AX=0043h,AX=00B2h,AX=00B6h
--------V-6200AF-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SETLINES" - SET TEXT ROWS ON SCREEN
        AX = 00AFh
        BX = new screen size (25, 43, 50)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0047h
--------V-6200B0-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SETMODE" - SELECT VIDEO MODE AND INITIALIZE
        AX = 00B0h
        BX = new video mode or FFFFh for current mode (see #03500)
        ES:DX -> WORD shareware splash screen flag
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call resets the active video page to page 0000h, the clipping
          region to the entire screen, text rows to 25, etc.
        in the shareware version, FGDRIVER sets the word pointed at by ES:DX
          to 9090h after it shows the shareware announcement to the user
SeeAlso: AX=004Bh,INT 10/AH=00h

(Table 03500)
Values for FGDRIVER video mode:
 00h-07h standard BIOS modes
 09h    PCjr/Tandy1000 320x200x16
 0Bh    Hercules graphics 720x348
 0Ch    Hercules graphics 320x200
 0Dh-13h standard BIOS modes
 14h    VGA graphics 320x200x256
 15h    VGA graphics 320x400x256
 16h    VGA graphics 320x240x256
 17h    VGA graphics 320x480x256
 18h    SVGA graphics 640x400x256
 19h    SVGA graphics 640x480x256
 1Ah    SVGA graphics 800x600x256
 1Bh    SVGA graphics 1024x768x256
 1Ch    SVGA graphics 800x600x16
 1Dh    SVGA graphics 1024x768x16
--------V-6200B1-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SETNUM" - SET STATE OF NUMLOCK KEY
        AX = 00B1h
        BX = new state (0000h off, 0001h on)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=000Ah,AX=0082h,AX=00A4h,AX=00A8h
--------V-6200B2-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SETPAGE" - SET ACTIVE VIDEO PAGE
        AX = 00B2h
        BX = new video page (0000h to 003Fh)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The specified page must be a physical or virtual page
SeeAlso: AX=0039h,AX=0042h,AX=0043h,AX=0050h,AX=0088h
--------V-6200B3-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SETRGB" - SET VIDEO DAC REGISTER CONTENTS
        AX = 00B3h
        BX = palette or DAC register number
        CX = red color component
        DX = green component
        SI = blue component
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The register number may be negative for Tandy, PCjr, and 200-line
          EGA graphics modes to specify an intense color
        This call has no effect in text, CGA graphics, and Hercules graphics
          modes
SeeAlso: AX=004Eh
--------V-6200B4-----------------------------
INT 62 u - FGDRIVER v4.02 - UNUSED
        AX = 00B4h
Return: AX = 0000h
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
--------V-6200B5-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SETVIEW" - DEFINE VIEWPORT
        AX = 00B5h
        ES:BX -> variable record (see #03501)
        CX = viewport's top edge in screen space
        DX = viewport's bottom edge in screen space
Return: nothing
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=004Fh

Format of FGDRIVER SETVIEW variable record:
Offset  Size    Description     (Table 03501)
 00h    WORD    viewport's left edge in viewport units
 02h    WORD    viewport's right edge in viewport units
 04h    WORD    viewport's top edge in viewport units
 06h    WORD    viewport's bottom edge in viewport units
 08h    WORD    viewport's left edge in screen space
 0Ah    WORD    viewport's right edge in screen space
--------V-6200B6-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SETVPAGE" - SET VISIBLE VIDEO PAGE
        AX = 00B6h
        BX = new video page (0000h to 003Fh)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The specified page must be a physical or virtual page
SeeAlso: AX=0043h,AX=00AEh,AX=00B2h
--------V-6200B7-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SHEAR" - SHEAR UNPACKED BITMAP
        AX = 00B7h
        ES:BX -> variable pointer record (see #03502)
        CX = bitmap width (0 < width <= 1024)
        DX = bitmap height (0 < height <= 1024)
        SI = size of resulting image (width for horiz. shear, height for vert.)
        DI = shear type
            0000h horizontal shear to left
            0001h horizontal shear to right
            0002h vertical shear to left (left edge stretched up)
            0003h vertical shear to right (right edge stretched up)
Return: nothing
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=00A3h

Format of FGDRIVER SHEAR variable pointer record:
Offset  Size    Description     (Table 03502)
 00h    WORD    segment of source bitmap
 02h    WORD    offset of source bitmap
 04h    WORD    segment of buffer for resulting bitmap
 06h    WORD    offset of buffer for resulting bitmap
--------V-6200B8-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SHOWFLIC" - DISPLAY IMAGE FROM FLI/FLC FILE
        AX = 00B8h
        ES:BX -> ASCIZ filename for FLI/FLC file
        CX = number of times to display image file (0000h = continuously)
        DX = control flags (see #03479 at AX=0031h)
Return: AX = status
            0000h successful
            0001h file not found
            0002h not a valid FLI/FLC file
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        the FLI/FLC display may be stopped by the user by pressing Esc
SeeAlso: AX=0030h,AX=0031h,AX=00B9h
--------V-6200B9-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SHOWPCX" - DISPLAY IMAGE FROM PCX FILE
        AX = 00B9h
        ES:BX -> ASCIZ filename of PCX image
        CX = flags (see #03503)
Return: AX = status
            0000h success
            0001h file not found
            0002h not a PCX file
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function is ignored in text modes and Hercules low-res graphics
SeeAlso: AX=005Bh,AX=0060h"1.10",AX=006Ch,AX=006Dh,AX=006Eh,AX=00B8h,AX=00BAh
SeeAlso: AX=00BBh

Bitfields for FGDRIVER flags:
Bit(s)  Description     (Table 03503)
 0      use current palette rather than PCX file's palette
 1      display image at cursor position instead of position in PCX header
 2-15   reserved
--------V-6200BA-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SHOWPPR" - DISPLAY IMAGE FROM PPR FILE
        AX = 00BAh
        ES:BX -> ASCIZ filename of packed pixel run image
        CX = width in pixels (nonzero)
Return: AX = status
            0000h successful
            0001h file not found
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The image is displayed with its lower left corner at the current
          graphics cursor position
        This function is ignored in text modes and 256-color graphics modes
SeeAlso: AX=005Bh,AX=006Ch,AX=006Dh,AX=006Eh,AX=00B9h,AX=00BBh
--------V-6200BB-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SHOWSPR" - DISPLAY IMAGE FROM SPR FILE
        AX = 00BBh
        ES:BX -> ASCIZ filename of standard pixel run image
        CX = width in pixels (nonzero)
Return: AX = status
            0000h successful
            0001h file not found
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The image is displayed with its lower left corner at the current
          graphics cursor position
        This function is ignored in text modes
SeeAlso: AX=005Bh,AX=006Ch,AX=006Dh,AX=006Eh,AX=00B9h,AX=00BAh
--------V-6200BC-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SOUND" - MAKE SOUND FOR SPECIFIED DURATION
        AX = 00BCh
        BX = frequency in Hertz (18-32767)
        CX = duration in clock ticks (0000h or negative for continuous sound)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored if asynchronous sound (AX=00A5h,AX=00A8h,
          AX=00AAh) is already in progress
SeeAlso: AX=0059h,AX=0080h,AX=00BDh,AX=00C0h,AX=00DBh
--------V-6200BD-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SOUNDS" - PLAY SOUNDS IN BACKGROUND
        AX = 00BDh
        CX = number of times to cycle through sound list
        ES:BX -> sounds array (see #03504)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored if asynchronous sound (AX=00A5h,AX=00A8h,
          AX=00AAh) is already in progress
SeeAlso: AX=0059h,AX=0081h,AX=00BCh,AX=00C0h,AX=00DCh

Format of FGDRIVER sounds array element:
Offset  Size    Description     (Table 03504)
 00h    WORD    frequency of sound in Hertz (0000h ends array)
 02h    WORD    duration of sound in clock ticks
--------V-6200BE-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SPLIT" - ENABLE/DISABLE SPLIT SCREEN ENVIRONMNT
        AX = 00BEh
        BX = beginning row for bottom half of split-screen
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
--------V-6200BF-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_STALL" - PAUSE FOR SPECIFIED DURATION
        AX = 00BFh
        BX = duration in processor-dependent delay units (see AX=0070h)
Return: after delay elapses
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0070h,INT 2F/AX=1224h
--------V-6200C0-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SUSPEND" - TEMPORARILY STOP ASYNCHRONOUS SOUND
        AX = 00C0h
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call has no effect if there is no asynchronous sound in progress
        The program must not exit while sound is suspended
SeeAlso: AX=0059h,AX=0080h,AX=00BDh,AX=00C0h,AX=00DBh
--------V-6200C1-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SVGAINIT" - INITIALIZE FASTGRAPH SVGA KERNEL
        AX = 00C1h
        BX = method (see #03505)
Return: AX = status
            0000h no VESA BIOS or supported SVGA chipset
            0001h using VESA BIOS
            0002h-0016h specific chipset being used (same as "method" below)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function must be called before attempting to set SVGA graphics
          modes (18h to 1Dh) or using "FG_BESTMODE", "FG_TESTMODE", or
          "FG_MEMORY"
SeeAlso: AX=0025h,AX=00C2h,AX=00C3h

(Table 03505)
Values for FGDRIVER SVGA method:
 0000h  autodetect, give chipset-specific code priority over VESA
 0001h  autodetect, give VESA priority over chipset-specific code
 0002h  Ahead type "A"
 0003h  Ahead type "B"
 0004h  ATI 18800
 0005h  ATI 18800-1
 0006h  ATI 28800
 0007h  Chips & Technologies 82c451/455/456
 0008h  C&T 82c452
 0009h  C&T 82c453
 000Ah  Genoa 6000 series
 000Bh  Oak OTI-067
 000Ch  Paradise PVGA1a
 000Dh  Paradise WD90C00/WD90C10
 000Eh  Paradise WD90C11/WD90C30/WD90C31
 000Fh  Trident 8800
 0010h  Trident 8900
 0011h  Tseng ET3000
 0012h  Tseng ET4000
 0013h  Video7
 0014h  Cirrus Logic 5400 series
 0015h  S3
 0016h  Trident 8900B/8900C/9000
--------V-6200C2-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SVGASTAT" - GET SVGA CHIPSET INFORMATION
        AX = 00C2h
Return: AX = chipset information (see #03506)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0025h,AX=00C1h,AX=00C3h

Bitfields for FGDRIVER chipset information:
Bit(s)  Description     (Table 03506)
 0      SVGA kernel initialized
 1      VESA support enabled
 2      extended video pages available in modes 13-23
 3      SVGA chipset has separate read and write banks
 4-15   reserved (0)
--------V-6200C3-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_SVGAVER" - GET FASTGRAPH SVGA KERNEL VERSION
        AX = 00C3h
        ES:BX -> variable pointer record (see #03507)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00C1h,AX=00C2h

Format of FGDRIVER variable pointer record:
Offset  Size    Description     (Table 03507)
 00h    WORD    segment of WORD buffer for major version
 02h    WORD    offset of WORD buffer for major version
 04h    WORD    segment of WORD buffer for minor version (hundredths)
 06h    WORD    offset of WORD buffer for minor version
--------V-6200C4-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_TCDEFINE" - DEFINE TRANSPARENCY OF COLOR INDEX
        AX = 00C4h
        BX = color index
        CX = transparency (00h opaque, other transparent)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function is ignored in text modes
SeeAlso: AX=00C5h,AX=00C6h
--------V-6200C5-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_TCMASK" - SET TRANSPARENT COLORS
        AX = 00C5h
        BX = colors to consider transparent (bit 0 = color 0, etc)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This call is ignored in text modes
        The specified colors are considered transparent by "FG_TCXFER"
SeeAlso: AX=00C4h,AX=00C6h
--------V-6200C6-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_TCXFER" - COPY REGION EXCLUDING TRANSPARENT
        AX = 00C6h
        CX = source video page
        DX = destination video page
        ES:BX -> copy record (see #03508)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        Pixels which are in any of the colors defined as transparent with
          "FG_TCMASK" (see AX=00C5h) are left unchanged in the destination
          region
        The source and destination regions must not overlap if they are located
          on the same page
        This call is ignored in text modes
SeeAlso: AX=00C4h,AX=00C5h,AX=00CAh
--------V-6200C7-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_TESTMODE" - CHECK IF VIDEO MODE AVAILABLE
        AX = 00C7h
        BX = desired video mode (00h-17h, also 18h-1Dh after "FG_SVGAINIT")
        CX = required number of video pages (ignore memory size if <= 0)
Return: AX = status
            0000h mode not available with requested number of pages
            0001h mode is available
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0005h,AX=00B0h
--------V-6200C8-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_TEXT" - DISPLAY STRING OF CHARACTERS
        AX = 00C8h
        CX = length of string
        ES:BX -> string
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The string is displayed starting at the text cursor position using the
          current text attribute (text modes) or color index (graphics modes)
        The text cursor position is updated after this call
SeeAlso: AX=000Ch,AX=0096h,AX=00C9h
--------V-6200C9-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_TEXTC" - DISPLAY STRING OF CHARACTERS (CLIPPED)
        AX = 00C9h
        CX = length of string
        ES:BX -> string
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        The string is displayed starting at the text cursor position using the
          current text attribute (text modes) or color index (graphics modes),
          showing only the portion within the current clipping window
        The text cursor position is updated after this call
SeeAlso: AX=00C8h
--------V-6200CA-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_TRANSFER" - COPY REGION
        AX = 00CAh
        CX = source video page
        DX = destination video page
        ES:BX -> copy record (see #03508)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        The source and destination regions must not overlap if they are located
          on the same page
SeeAlso: AX=009Eh,AX=00A2h,AX=00A5h,AX=00C6h

Format of FGDRIVER copy record:
Offset  Size    Description     (Table 03508)
 00h    WORD    left edge column of source region
 02h    WORD    right edge column of source region
 04h    WORD    top edge row of source region
 06h    WORD    bottom edge row of source region
 08h    WORD    left edge of destination
 0Ah    WORD    bottom edge of destination
--------V-6200CB-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_UNPACK" - EXPAND MODE-SPECIFIC BITMAP
        AX = 00CBh
        ES:BX -> variable pointer record (see #03509)
        CX = size of source bitmap in bytes
Return: result buffer filled
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=0083h

Format of FGDRIVER UNPACK variable pointer record:
Offset  Size    Description     (Table 03509)
 00h    WORD    segment of source bitmap
 02h    WORD    offset of source bitmap
 04h    WORD    segment of buffer for resulting bitmap
 06h    WORD    offset of buffer for resulting bitmap
--------V-6200CC-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VBADDR" - GET ADDRESS OF VIRTUAL BUFFER
        AX = 00CCh
        BX = virtual buffer handle (0000h-001Fh)
Return: DX:AX -> virtual buffer
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=00CDh,AX=00CEh,AX=00CFh,AX=00D3h
--------V-6200CD-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VBALLOC" - CREATE VIRTUAL BUFFER
        AX = 00CDh
        BX = width of virtual buffer in pixels
        CX = height in pixels
Return: AX = handle for virtual buffer, or
            FFFEh out of memory
            FFFFh virtual buffer table full
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=00CCh,AX=00CEh,AX=00D0h,AX=00D1h,AX=00D2h,AX=00D4h
--------V-6200CE-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VBCLOSE" - CLOSE ACTIVE VIRTUAL BUFFER
        AX = 00CEh
Desc:   close the active virtual buffer and direct further graphics to the
          active video page
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=00CCh,AX=00D1h,AX=00D4h,AX=00D5h,AX=00D9h
--------V-6200CF-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VBCOPY" - COPY RECT BETWEEN VIRTUAL BUFFERS
        AX = 00CFh
        ES:BX -> variable record (see #03510)
        CX = handle for source virtual buffer
        DX = handle for destination virtual buffer
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        if the destination buffer is the same as the source buffer, the regions
          must not overlap
SeeAlso: AX=00D0h,AX=00D1h,AX=00D4h,AX=00D6h,AX=00D7h

Format of FGDRIVER VBCOPY variable record:
Offset  Size    Description     (Table 03510)
 00h    WORD    source region's left edge
 02h    WORD    source region's right edge
 04h    WORD    source region's top edge
 06h    WORD    source region's bottom edge
 08h    WORD    X coordinate of destination's upper left corner
 0Ah    WORD    Y coordinate of destination's upper left corner
--------V-6200D0-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VBCUT" - COPY RECT FROM VIDEO TO VIRTUAL BUFFER
        AX = 00D0h
        BX = source region's left edge
        CX = source region's right edge
        DX = source region's top edge
        SI = source region's bottom edge
        DI = X coordinate of destination's upper left corner
        ES = Y coordinate of destination's upper left corner
Desc:   copy a rectangle from the active video page to the active virtual
          buffer
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=00CDh,AX=00CFh,AX=00D4h,AX=00D6h
--------V-6200D1-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VBDEFINE" - CREATE VIRTUAL BUFFER
        AX = 00D1h
        ES:BX -> memory block for virtual buffer
        CX = buffer width in pixels
        DX = buffer height in pixels
Return: AX = virtual buffer handle
            FFFFh on error
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        the application-provided buffer must be large enough to hold CX*DX
          bytes
SeeAlso: AX=00CCh,AX=00CDh,AX=00CEh,AX=00D2h,AX=00D4h,AX=00D5h
--------V-6200D2-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VBFREE" - RELEASE VIRTUAL BUFFER
        AX = 00D2h
        BX = virtual buffer handle
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        this function should be used only for buffers created with FG_VBALLOC
SeeAlso: AX=00CDh,AX=00D4h,AX=00D5h
--------V-6200D3-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VBHANDLE" - GET ACTIVE VIRTUAL BUFFER'S HANDLE
        AX = 00D3h
Return: AX = handle for active virtual buffer
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=00CCh,AX=00D4h
--------V-6200D4-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VBINIT" - INITIALIZE VIRTUAL BUFFER ENVIRONMENT
        AX = 00D4h
Return: nothing
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        this function must be called before any other virtual buffer functions
          are used
SeeAlso: AX=00CDh,AX=00D5h
--------V-6200D5-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VBOPEN" - MAKE VIRTUAL BUFFER ACTIVE
        AX = 00D5h
        BX = virtual buffer handle
Return: AX = status
            0000h successful
            FFFEh no buffer defined for specified handle
            FFFFh invalid buffer handle
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=00CDh,AX=00CEh,AX=00D1h,AX=00D4h,AX=00D9h
--------V-6200D6-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VBPASTE" - COPY RECT FROM VIRTUAL BUF TO VIDEO
        AX = 00D6h
        BX = source region's left edge
        CX = source region's right edge
        DX = source region's top edge
        SI = source region's bottom edge
        DI = X coordinate of destination's upper left corner
        ES = Y coordinate of destination's upper left corner
Desc:   copy a rectangle from the active virtual buffer to the active video
          page
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=00CFh,AX=00D0h,AX=00D4h,AX=00D7h
--------V-6200D7-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VBTCCOPY" - COPY RECTANGLE BETWEEN VIRTUAL BUFS
        AX = 00D7h
        ES:BX -> variable record (see #03511)
        CX = source virtual buffer's handle
        DX = destination virtual buffer's handle
Desc:   copy rectangle from one virtual buffer to another with transparent
          colors
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        if the destination buffer is the same as the source buffer, the regions
          must not overlap
SeeAlso: AX=00CFh,AX=00D0h,AX=00D6h,AX=00D8h

Format of FGDRIVER VBTCCOPY variable record:
Offset  Size    Description     (Table 03511)
 00h    WORD    source region's left edge
 02h    WORD    source region's right edge
 04h    WORD    source region's top edge
 06h    WORD    source region's bottom edge
 08h    WORD    X coordinate of destination region's upper left corner
 0Ah    WORD    Y coordinate of destination region's upper left corner
--------V-6200D8-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VBTCXFER" - COPY RECTANGLE TO ACTIVE VIDEO PAGE
        AX = 00D8h
        BX = source region's left edge
        CX = source region's right edge
        DX = source region's top edge
        SI = source region's bottom edge
        DI = X coordinate of destination's upper left corner
        ES = Y coordinate of destination's upper left corner
Desc:   copy a rectangle from the active virtual buffer to the active video
          page, with transparent colors
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
SeeAlso: AX=00D6h,AX=00D7h
--------V-6200D9-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VBUNDEF" - RELEASE HANDLE FOR VIRTUAL BUFFER
        AX = 00D9h
        BX = virtual buffer handle
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        the specified handle must not reference the currently-active virtual
          buffer
SeeAlso: AX=00D1h,AX=00D5h
--------V-6200DA-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VGASTATE" - SAVE/RESTORE VGA CONTROLLER STATE
        AX = 00DAh
        BX = direction (0000h save, else restore)
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474)
        this function is only meaningful in modes 0Dh and above
--------V-6200DB-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VOICE" - START SOUND
        AX = 00DBh
        BX = channel on TI sound chip
            1-3 = channels 1-3, 4 = channel 4 with periodic noise,
            5 = channel 4 with white noise
        CX = frequency in Hz (18-32767 for channels 1-3; 0=512 Hz, 1=1024 Hz,
              2=2048 Hz for channels 4 and 5)
        DX = volume
        SI = duration in clock ticks (continuous if <= 0)
Program: FGDRIVER is the external video driver for the shareware
          Fastgraph/Light by Ted Gruber Software
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function is only available on the PCjr and Tandy 1000 machines
SeeAlso: AX=0080h,AX=00BCh,AX=00DCh
--------V-6200DC-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_VOICES" - PLAY SOUNDS IN BACKGROUND
        AX = 00DCh
        ES:BX -> tone array (see #03512)
        CX = number of times to repeat tone array
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        This function is only available on the PCjr and Tandy 1000 machines
SeeAlso: AX=0059h,AX=0081h,AX=00BDh,AX=00DBh

Format of FGDRIVER tone array element:
Offset  Size    Description     (Table 03512)
 00h    WORD    channel number (0000h terminates array)
 02h    WORD    frequency
 04h    WORD    volume
 06h    WORD    duration in 1/72.8 seconds
--------V-6200DD-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_WAITFOR" - DELAY FOR SPECIFIED DURATION
        AX = 00DDh
        BX = duration in clock ticks
Return: after delay elapses
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00BFh,INT 1A/AX=FF01h
--------V-6200DE-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_WAITKEY" - FLUSH KEYBOARD BUFFER AND AWAIT KEY
        AX = 00DEh
Return: after next key pressed
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=000Ah,AX=0046h,AX=0063h,AX=0069h,INT 16/AH=00h
--------V-6200DF-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_WAITVR" - ENABLE/DISABLE VERTICAL RETRACE WAIT
        AX = 00DFh
        BX = new state (0000h disabled, 0001h enabled)
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
--------V-6200E0-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_WHERE" - GET CURRENT CURSOR POSITION
        AX = 00E0h
        ES:BX -> variable pointers (see #03513)
Return: indicated variables filled with cursor row and column for active
          display
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0054h,AX=0058h,AX=006Bh,AX=007Eh

Format of FGDRIVER variable pointers:
Offset  Size    Description     (Table 03513)
 00h    WORD    segment of WORD buffer for cursor row
 02h    WORD    offset of WORD buffer for cursor row
 04h    WORD    segment WORD buffer for cursor column
 06h    WORD    offset WORD buffer for cursor column
--------V-6200E1-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_XALPHA" - CONVERT SCREEN COLUMN TO CHAR COLUMN
        AX = 00E1h
        BX = screen space column
Return: AX = character space column containing specified coordinate
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00E2h,AX=00E4h
--------V-6200E2-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_XCONVERT" - CONVERT CHAR COLUMN TO SCREEN COL
        AX = 00E2h
        BX = character space column
Return: AX = screen space column of leftmost pixel in specified character col
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00E2h,AX=00E5h
--------V-6200E3-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_XVIEW" - CONVERT VIEWPORT COORDINATE
        AX = 00E3h
        BX = horizontal viewport coordinate
Return: AX = screen space X coordinate corresponding to supplied coordinate
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        if no viewport has been defined, the returned coordinate will be the
          same as the viewport coordinate
SeeAlso: AX=00E2h,AX=00E6h
--------V-6200E4-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_YALPHA" - CONVERT SCREEN ROW TO CHARACTER ROW
        AX = 00E4h
        BX = screen space row
Return: AX = character space row containing specified coordinate
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00E1h,AX=00E5h
--------V-6200E5-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_YCONVERT" - CONVERT CHARACTER ROW TO SCREEN ROW
        AX = 00E5h
        BX = character space row
Return: AX = screen space row of topmost pixel in specified character row
Note:   the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00E2h,AX=00E4h,AX=00E6h
--------V-6200E6-----------------------------
INT 62 u - FGDRIVER v4.02 - "FG_YVIEW" - TRANSLATE VERTICAL VIEWPORT COORDINATE
        AX = 00E6h
        BX = viewport Y coordinate
Return: AX = screen space row for viewport coordinate
Program: FGDRIVER is the external video driver for the shareware
          Fastgraph/Light by Ted Gruber Software
Notes:  the FGDRIVER functions are rearranged with each major release, but
          their parameters do not change (see #03474 at AX=0000h)
        if no viewport has been defined, the returned coordinate will be the
          same as the viewport coordinate
SeeAlso: AX=00E3h,AX=00E5h
--------T-6201-------------------------------
INT 62 - Cswitch - GIVE UP REST OF TIME-SLICE
        AH = 01h
Program: Cswitch is a set of multitasking functions by Herb Rose
SeeAlso: AH=05h"Cswitch",AH=06h"Cswitch",INT 15/AX=1000h,INT 2F/AX=1680h
--------N-6201-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - NOP for ETHDEV.ODI
        AH = 01h
Return: CF clear if successful
        CF set on error
            AL = error code
Range:  INT 4C to INT FB, selected by configuration
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------T-6202-------------------------------
INT 62 - Cswitch - WAIT FOR SEMAPHORE
        AH = 02h
        DX = semaphore number (0-63)
Return: AX = FFFFh bad semaphore number
             else  success
SeeAlso: AH=03h"Cswitch",AH=04h"Cswitch"
--------N-6202-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - INITIALIZE
        AH = 02h
Return: CF clear if successful
        CF set on error
            AL = error code
SeeAlso: AH=00h"ETHDEV",AH=03h"ETHDEV",AH=FEh,INT 21/AH=3Fh"BW-TCP"
SeeAlso: INT 63/AH=03h"BW-TCP",INT 63/AH=24h"BW-TCP",INT 64/AH=01h"BW-NFS"
--------T-6203-------------------------------
INT 62 - Cswitch - CHECK SEMAPHORE
        AH = 03h
        DX = semaphore number (0-63)
Return: AX = status
            FFFFh not owned
            else  owned
SeeAlso: AH=02h,AH=04h
--------N-6203-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - GET REAL IP ADDRESS
        AH = 03h
        DS:SI -> DWORD buffer for IP address
Return: CF clear if successful
        CF set on error
            AL = error code
Range:  INT 4C to INT FB, selected by configuration
Note:   the Beame&Whiteside TCP/IP protocol stack uses two consecutive
          interrupts (62h and 63h by default); the BW-NFS client uses a third
          consecutive interrupt (64h by default) if it is loaded
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------T-6204-------------------------------
INT 62 - Cswitch - TRIGGER SEMAPHORE
        AH = 04h
        DX = semaphore number (0-63)
Return: AX = status
            FFFFh bad semaphore number
            else  success
SeeAlso: AH=02h"Cswitch",AH=03h"Cswitch"
--------N-6204-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - SET ???
        AH = 04h
        BX = ???
        ES:SI -> FAR routine for ???
Return: CF clear if successful
        CF set on error
            AL = error code
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------T-6205-------------------------------
INT 62 - Cswitch - SLEEP
        AH = 05h
        BX = seconds to sleep
SeeAlso: AH=01h"Cswitch",AH=06h"Cswitch",AH=08h"Cswitch"
--------N-6205-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - ???
        AH = 05h
        ???
Return: CF clear if successful
        CF set on error
            AL = error code
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------T-6206-------------------------------
INT 62 - Cswitch - SUSPEND
        AH = 06h
SeeAlso: AH=05h"Cswitch",AH=08h"Cswitch"
--------N-6206-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - ???
        AH = 06h
        ???
Return: CF clear if successful
        CF set on error
            AL = error code
Range:  INT 4C to INT FB, selected by configuration
Note:   the Beame&Whiteside TCP/IP protocol stack uses two consecutive
          interrupts (62h and 63h by default); the BW-NFS client uses a third
          consecutive interrupt (64h by default) if it is loaded
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------T-6207-------------------------------
INT 62 - Cswitch - SPAWN
        AH = 07h
        ES:BX -> function address to start executing at
        CX = priority (1-10)
Return: AX = result/status
            FFFDh  no free memory control blocks
            FFFEh  no free task control blocks
            FFFFh  not enough memory to create new task stack
            >0     the tcb number of the new task, indicating no error
SeeAlso: AH=0Fh"Cswitch",AH=10h"Cswitch"
--------N-6207-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - ???
        AH = 07h
        DS:SI -> ???
Return: CF clear if successful
        CF set on error
            AL = error code
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------T-6208-------------------------------
INT 62 - Cswitch - WAKE UP TASK
        AH = 08h
        BX = tcb identifier
SeeAlso: AH=05h,AH=06h
--------N-6208-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - ???
        AH = 08h
        CX = ???
        ES:SI -> ??? buffer (see #03514)
Return: CF clear if successful
        CF set on error
            AL = error code
Range:  INT 4C to INT FB, selected by configuration
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"

Format of BW-TCP ??? buffer:
Offset  Size    Description     (Table 03514)
 00h  6 BYTEs   hardware address???
 06h  6 BYTEs   ???
 0Ch    WORD    ???
 0Eh    WORD    ???
----------6208--CXFFFE-----------------------
INT 62 - MS SQL Server/Sybase DBLIBRARY interface - UNINSTALL/GET PSP ADDR
        AH = 08h
        CX = FFFEh
        DX = FFFFh
Return: AX = PSP address of resident DBLIBRARY
Note:   this call does not free the memory allocated to the TSR; the calling
          code must do the deallocation.
SeeAlso: INT 62"DBLIBRARY"
--------T-6209-------------------------------
INT 62 - Cswitch - SET PRIORITY
        AH = 09h
        BX = new base priority (1-10)
Note:   the lower the priority is numerically, the more often the task will run
--------N-6209-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - HOOK TIMER INTERRUPT
        AH = 09h
Return: CF clear if successful
            AX = handler ID
        CF set on error
            AL = error code
Range:  INT 4C to INT FB, selected by configuration
Note:   the Beame&Whiteside TCP/IP protocol stack uses two consecutive
          interrupts (62h and 63h by default); the BW-NFS client uses a third
          consecutive interrupt (64h by default) if it is loaded
SeeAlso: AH=0Ah"ETHDEV",AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------T-620A-------------------------------
INT 62 - Cswitch - TEST MESSAGE QUEUE
        AH = 0Ah
        DX = queue number (0-63)
Return: AX = result/message size
            0000h nothing on queue
            FFFFh bad queue number
            else  number of bytes in first message in queue
SeeAlso: AH=0Bh"Cswitch",AH=0Ch"Cswitch"
--------N-620A-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - UNHOOK TIMER INTERRUPT
        AH = 0Ah
        DX = handler ID
Return: CF clear if successful
        CF set on error
            AL = error code
SeeAlso: AH=09h"ETHDEV",AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------T-620B-------------------------------
INT 62 - Cswitch - SEND MESSAGE
        AH = 0Bh
        CX = number of bytes to write
        DS:SI -> buffer
        DX = queue number (0-63)
Return: AX = result/message size
            0000h no message was on queue
            FFFEh triggered by something arriving, redo the call
            FFFFh bad queue number
            else  number of bytes in message
SeeAlso: AH=0Ah"Cswitch",AH=0Ch"Cswitch"
--------N-620B-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - ADD ???
        AH = 0Bh
        AL = ???
        DX = ???
        BP = ???
        ES:SI -> ???
Return: CF clear if successful
        CF set on error
            AL = error code
SeeAlso: AH=0Ch"ETHDEV",AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------T-620C-------------------------------
INT 62 - Cswitch - READ MESSAGE
        AH = 0Ch
        CX = number of bytes to read
        DS:SI -> buffer
        DX = queue number (0-63)
Return: AX = status
            FFFFh bad queue number
            else  number of bytes transferred
SeeAlso: AH=0Ah,AH=0Bh
--------N-620C-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - REMOVE ???
        AH = 0Ch
        DX = ???
        BP = ???
Return: CF clear if successful
        CF set on error
            AL = error code
Range:  INT 4C to INT FB, selected by configuration
Note:   the Beame&Whiteside TCP/IP protocol stack uses two consecutive
          interrupts (62h and 63h by default); the BW-NFS client uses a third
          consecutive interrupt (64h by default) if it is loaded
SeeAlso: AH=0Bh"ETHDEV",AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------T-620D-------------------------------
INT 62 - Cswitch - DON'T ALLOW TASK TO BE SWAPPED OUT
        AH = 0Dh
SeeAlso: AH=0Eh"Cswitch"
--------N-620D-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - NOP for ETHDEV.ODI
        AH = 0Dh
Return: CF clear if successful
        CF set on error
            AL = error code
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------T-620E-------------------------------
INT 62 - Cswitch - ALLOW TASK TO BE SWAPPED OUT
        AH = 0Eh
SeeAlso: AH=0Dh"Cswitch"
--------N-620E-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - BEGIN CRITICAL SECTION
        AH = 0Eh
Return: CF clear if successful
        CF set on error
            AL = error code
SeeAlso: AH=0Fh"ETHDEV",AH=10h"ETHDEV",AH=FEh,INT 21/AH=3Fh"BW-TCP"
SeeAlso: INT 63/AH=03h"BW-TCP",INT 63/AH=24h"BW-TCP",INT 64/AH=01h"BW-NFS"
--------T-620F-------------------------------
INT 62 - Cswitch - LOAD AND RUN PROGRAM FROM DISK
        AH = 0Fh
        ES:BX -> command line
        CX = priority (1-10)
        DX = background flag (nonzero allows loading to EMS)
Return: AX = status
            0000h task loader queue is full
            0001h  no error
SeeAlso: AH=07h"Cswitch",AH=10h"Cswitch",AH=13h"Cswitch"
--------N-620F-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - END CRITICAL SECTION
        AH = 0Fh
Return: CF clear if successful
        CF set on error
            AL = error code
Range:  INT 4C to INT FB, selected by configuration
Note:   the Beame&Whiteside TCP/IP protocol stack uses two consecutive
          interrupts (62h and 63h by default); the BW-NFS client uses a third
          consecutive interrupt (64h by default) if it is loaded
SeeAlso: AH=0Eh"ETHDEV",AH=10h"ETHDEV",AH=FEh,INT 21/AH=3Fh"BW-TCP"
SeeAlso: INT 63/AH=03h"BW-TCP",INT 63/AH=24h"BW-TCP",INT 64/AH=01h"BW-NFS"
--------T-6210-------------------------------
INT 62 - Cswitch - TERMINATE SPAWNED PROGRAM
        AH = 10h
SeeAlso: AH=07h"Cswitch",AH=0Fh"Cswitch"
--------N-6210-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - QUERY CRITICAL SECTION
        AH = 10h
Return: CF clear if no critical section active
        CF set if in critical section
SeeAlso: AH=0Eh"ETHDEV",AH=0Fh"ETHDEV",AH=FEh,INT 21/AH=3Fh"BW-TCP"
SeeAlso: INT 63/AH=03h"BW-TCP",INT 63/AH=24h"BW-TCP",INT 64/AH=01h"BW-NFS"
--------T-6211-------------------------------
INT 62 - Cswitch - GET TCB INFORMATION
        AH = 11h
        ES:BX -> a pointer which will be set to the tcb address
Return: AX = tcb indentifier
SeeAlso: AH=12h
--------N-6211-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - SET ???
        AH = 11h
        ES:SI -> ???
Return: CF clear
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------T-6212-------------------------------
INT 62 - Cswitch - GET TCB ADDRESS
        AH = 12h
        ES:BX -> a pointer which will be set to the tcb table address
Return: AX = tcb indentifier
SeeAlso: AH=11h"Cswitch"
--------N-6212-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - GET SOCKET NUMBER???
        AH = 12h
Return: CF clear if successful
            AX = socket number??? (memory variable incremented after reading)
        CF set on error
            AL = error code
Range:  INT 4C to INT FB, selected by configuration
Note:   the Beame&Whiteside TCP/IP protocol stack uses two consecutive
          interrupts (62h and 63h by default); the BW-NFS client uses a third
          consecutive interrupt (64h by default) if it is loaded
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------T-6213-------------------------------
INT 62 - Cswitch - CHECK STATUS OF PREVIOUS LOAD_TASK
        AH = 13h
Return: AX = result
            FFFCh no Memory Control Blocks available
            FFFDh no TCBs available
            FFFEh insufficient memory
            FFFFh cannot open file
            0000h load in progress (not done yet)
            else  tcb indentifier
SeeAlso: AH=0Fh
--------N-6213-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - ???
        AH = 13h
        CX = ???
Return: CF clear if successful
            AL = 00h
        CF set on error
            AL = error code
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------N-6214-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - ???
        AH = 14h
        ES:SI -> ???
Return: CF clear if successful
            AL = 00h
        CF set on error
            AL = error code
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------N-6215-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - GET ???
        AH = 15h
Return: CF clear if successful
            AX = ??? (destroyed???)
        CF set on error
            AL = error code
Range:  INT 4C to INT FB, selected by configuration
Notes:  call this function after reading the "ETHDEV27" device
        the Beame&Whiteside TCP/IP protocol stack uses two consecutive
          interrupts (62h and 63h by default); the BW-NFS client uses a third
          consecutive interrupt (64h by default) if it is loaded
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
INT 64/AH=01h"BW-NFS"
--------N-6216-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - ???
        AH = 16h
        ???
Return: CF clear if successful
        CF set on error
            AL = error code
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------N-6217-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - ???
        AH = 17h
        DX = segment of ???
Return: CF clear
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=24h"BW-TCP"
SeeAlso: INT 64/AH=01h"BW-NFS"
--------N-6218-------------------------------
INT 62 - BW-TCP - HW DRIVER (ETHDEV.SYS) - ALLOCATE AND MAP EMS FOR DRIVER
        AH = 18h
Return: CF clear if successful
        CF set on error
            AL = error code
Range:  INT 4C to INT FB, selected by configuration
Notes:  calls function 17h after EMS allocated and mapped
        the Beame&Whiteside TCP/IP protocol stack uses two consecutive
          interrupts (62h and 63h by default); the BW-NFS client uses a third
          consecutive interrupt (64h by default) if it is loaded
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63/AH=03h"BW-TCP",INT 63/AH=24h
SeeAlso: INT 64/AH=01h"BW-NFS"
--------R-6247-------------------------------
INT 62 - PC Tools v7 COMMUTE - ???
        AH = 47h
        AL = subfunction (00h-31h)
        ???
        CF set
Return: ???
Program: COMMUTE is a remote-control program bundled with Central Point
          Software's PC Tools
--------R-6248-------------------------------
INT 62 - PC Tools v7 COMMUTE - ???
        AH = 48h
        AL = ???
        ???
        CF set
Return: ???
--------R-6249-------------------------------
INT 62 - PC Tools v7 COMMUTE - ???
        AH = 49h
        ???
        CF set
Return: ???
Note:   may be the same as AH=4Ch
--------R-624A-------------------------------
INT 62 - PC Tools v7 COMMUTE - ???
        AH = 4Ah
        AL = subfunction (00h-46h)
        ???
        CF set
Return: ???
--------R-624B--BX1234-----------------------
INT 62 - PC Tools v7 COMMUTE - ???
        AH = 4Bh
        BX = 1234h
        CX = 1234h
        ES = ???
        CF set
Return: ???
Program: COMMUTE is a remote-control program bundled with Central Point
          Software's PC Tools
--------R-624C-------------------------------
INT 62 - PC Tools v7 COMMUTE - ???
        AH = 4Ch
        BL = subfunction
            00h ???
            02h ???
Return: CF clear if successful
        CF set on error
--------R-626262-----------------------------
INT 62 - PC Tools v7 COMMUTE - INSTALLATION CHECK
        AX = 6262h
        CF set
Return: AX = 0000h
        BX = segment of resident code's PSP
Program: COMMUTE is a remote-control program bundled with Central Point
          Software's PC Tools
--------s-62C0-------------------------------
INT 62 U - GWBTSR - API
        AH = C0h
        AL = function
            00h installation check
                Return: AX = 00FFh if installed
            01h ???
Program: GWBTSR is a huge (48K) resident mixer controller for the Gateway 2000
          sound card (OEM version of Aztech Sound Galaxy)
Index:  installation check;GWBTSR
--------N-62FE-------------------------------
INT 62 - BW-TCP - ETHDRV.SYS - MAP EMS PAGE FRAME
        AH = FEh
        AL = direction
            00h map in driver's memory block
            01h map out driver's memory block
Return: CF clear if successful
        CF set on error
            AL = error code
Range:  INT 4C to INT FB, selected by configuration
Notes:  this function is supported by at least the SLIP and ODI versions of
          ETHDEV.SYS
        the Beame&Whiteside TCP/IP protocol stack uses two consecutive
          interrupts (62h and 63h by default); the BW-NFS client uses a third
          consecutive interrupt (64h by default) if it is loaded
SeeAlso: INT 21/AH=3Fh"BW-TCP",INT 62/AH=00h"ETHDEV",INT 62/AH=18h"ETHDEV"
SeeAlso: INT 63/AH=03h"BW-TCP",INT 63/AH=24h,INT 64/AH=FEh
--------*-63---------------------------------
INT 63 - reserved for user interrupt
--------d-63---------------------------------
INT 63 - Adaptec and OMTI controllers - DRIVE 0 DATA
Desc:   this vector stores the last four bytes of the parameter table for
          hard disk 0
SeeAlso: INT 60"Adaptec",INT 61"Adaptec",INT 62"Adaptec",INT 64"Adaptec"
--------b-63---------------------------------
INT 63 - TI Professional PC - OPTION ROM DATA AREA POINTER (NOT A VECTOR!)
Desc:   the low word of this vector contains the segment of the RAM data area
          to be used by the expansion ROM at F400h:4000h, and the high word
          contains the length of the data area; this segment and size are
          both set to 0000h if no ROM is installed at F400h:4000h
SeeAlso: INT 60"TI Professional PC",INT 62"TI Professional"
SeeAlso: INT 64"TI Professional PC"
----------63---------------------------------
INT 63 - Oracle SQL Protected Mode Executive - ???
--------d-63---------------------------------
INT 63 - 4+Power FLOPPY CONTROLLER - ORIGINAL INT 13/40
Desc:   the "4+Power" quad floppy controller BIOS hooks INT 13 (or INT 40 if
          INT 13 has been moved there) and places the old value here
----------63---------------------------------
INT 63 - Kofax KF9X00 image manipulation card interface
--------Q-63---------------------------------
INT 63 - DESQview/X - SOCKET API
InstallCheck:   test for the string "dvxunix" (yes, lowercase) at offset 9
          from the interrupt handler start (see #03515)
Notes:  parameters are passed by patching (!) data field immediately following
          the entry point, as detailed below (see #03515); the preferred
          method for calling the socket API is via INT 15/AX=DE2Eh
SeeAlso: INT 15/AX=DE2Eh,INT BE"DESQview"
Index:  installation check;DESQview/X socket interface

Format of DESQview/X socket interrupt handler entry:
Offset  Size    Description     (Table 03515)
 00h  3 BYTEs   near jump or short jump + NOP to actual interrupt handler
 03h    WORD    offset from following pointer for initial top of local stack
 05h    DWORD   pointer to argument/stack block (see INT 15/AX=DE2Eh)
 09h  7 BYTEs   signature "dvxunix"
--------b-6300-------------------------------
INT 63 - HP 100LX - MAP HIGH MEMORY
        AH = 00h
        AL = physical page (00h seg C000, 01h seg C400h, ...)
        BX = zero-based logical page
        CX = page number
        DX = device ID (00h system ROM, 05h plugin, etc.)
Return: ???
SeeAlso: AH=01h
--------N-6300-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - SET IP ADDRESS???
        AH = 00h
        DS:BX -> DWORD containing IP address (big-endian)
Return: CF clear if successful
        CF set on error
        AX destroyed
Range:  INT 4D to INT FC, selected by configuration
Note:   the Beame&Whiteside TCP/IP protocol stack uses two consecutive
          interrupts (62h and 63h by default); the BW-NFS client uses a third
          consecutive interrupt (64h by default) if it is loaded
SeeAlso: AH=01h"BW-TCP",AH=02h"BW-TCP"
--------b-6301-------------------------------
INT 63 - HP 100LX - SAVE/RESTORE MEMORY MAP
        AH = 01h
        AL = function (00h save, 01h restore)
        ???
Return: ???
--------N-6301-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 01h
        ES:BX -> ???
        ???
Return: ???
Range:  INT 4D to INT FC, selected by configuration
Note:   the Beame&Whiteside TCP/IP protocol stack uses two consecutive
          interrupts (62h and 63h by default); the BW-NFS client uses a third
          consecutive interrupt (64h by default) if it is loaded
SeeAlso: AH=00h"BW-TCP",AH=02h"BW-TCP"
--------N-6302-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 02h
        ???
Return: ???
SeeAlso: AH=00h"BW-TCP",AH=01h"BW-TCP"
--------N-6303-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - GET IP ADDRESS
        AH = 03h
        DS:SI -> buffer for DWORD IP address (big-endian)
Return: AX destroyed
        CF clear if successful
        CF set on error
Note:   this call may use ARP or RARP to determine the address
--------N-6304-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 04h
        ???
Return: ???
--------N-6305-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 05h
        DS:BX -> ???
        ES:SI -> ???
Return: ???
Range:  INT 4D to INT FC, selected by configuration
--------N-6306-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 06h
        ???
Return: ???
--------N-6307-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 07h
        ???
Return: ???
--------N-6308-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - SET DEFAULT ??? HANDLER
        AH = 08h
        DS:BX -> DWORD containing IP address
Return: CF clear if successful
        CF set on error
        ???
--------N-6309-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - INSTALL ??? HANDLERS
        AH = 09h
        BL = handler type
        ES:SI -> FAR handler of specified type
Return: ???
SeeAlso: AH=0Ah,AH=0Dh
--------N-630A-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - DELETE ??? HANDLERS
        AH = 0Ah
        BL = handler type
Return: CF clear if successful
        CF set on error (no handler of specified type installed)
SeeAlso: AH=09h
--------N-630B-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 0Bh
        AL = ???
        DL = ???
        DS:BX -> ???
        ES:SI -> ???
Return: ???
--------N-630C-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 0Ch
        ???
Return: ???
Range:  INT 4D to INT FC, selected by configuration
--------N-630D-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - INSTALL DEFAULT ??? HANDLER
        AH = 0Dh
        ???
Return: ???
Note:   if not already installed, installs a type 06h handler with AH=09h
SeeAlso: AH=09h
--------N-630E-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - CLOSE NETWORK DESCRIPTOR
        AH = 0Eh
        ???
Return: ???
SeeAlso: INT 61/AH=08h"PC/TCP",INT 61/AH=09h"PC/TCP",INT 61/AH=18h
--------N-630F-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 0Fh
        AL = ???
        SI = ???
        DS:DI -> ???
        ???
Return: ???
Range:  INT 4D to INT FC, selected by configuration
--------N-6310-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 10h
        DS:DI -> ???
        ???
Return: ???
--------N-6311-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 11h
        ???
Return: ???
--------N-6312-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - LISTEN FOR INCOMING CONNECTIONS
        AH = 12h
        DS:SI -> ???
        ES:BP -> ???
Return: ???
SeeAlso: AH=14h,INT 61/AH=23h
--------N-6313-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - NOP
        AH = 13h
Return: nothing
Range:  INT 4D to INT FC, selected by configuration
--------N-6314-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - OPEN NETWORK CONNECTION
        AH = 14h
        BX = network descriptor???
        DS:SI -> ???
        ES:BP -> ???
Return: ???
SeeAlso: AH=12h,AH=16h,AH=19h,INT 61/AH=13h"PC/TCP",INT 62/AH=13h"ETHDEV"
--------N-6315-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 15h
        DS:DI -> ???
        ???
Return: ???
Range:  INT 4D to INT FC, selected by configuration
--------N-6316-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - RESET NETWORK CONNECTION
        AH = 16h
        DS:DI -> ???
Return: ???
Note:   calls AH=17h after preprocessing
SeeAlso: AH=17h,INT 61/AH=19h"PC/TCP"
--------N-6317-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 17h
        DS:DI -> ???
        ???
Return: ???
Range:  INT 4D to INT FC, selected by configuration
SeeAlso: AH=18h
--------N-6318-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 18h
        DS:DI -> ???
        ???
Return: ???
Note:   same as AH=17h, except performed with interrupts disabled
SeeAlso: AH=17h
--------N-6319-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - WRITE TO THE NETWORK
        AH = 19h
        DS:DI -> ???
        ???
Return: BX = number of bytes NOT written
        ???
Range:  INT 4D to INT FC, selected by configuration
Note:   calls AH=17h with interrupts disabled and ??? set to 01h
SeeAlso: AH=14h,AH=1Ah,AH=1Bh,INT 61/AH=1Ah"PC/TCP"
--------N-631A-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - READ FROM THE NETWORK
        AH = 1Ah
        CX = maximum number of bytes to read
        ES:BP -> ???
        ???
Return: CX = number of bytes actually read
        ???
SeeAlso: AH=12h,AH=14h,AH=19h,INT 61/AH=1Bh"PC/TCP"
--------N-631B-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 1Bh
        CX = ???
        ES:BP -> ???
Return: DX = ???
        ???
Range:  INT 4D to INT FC, selected by configuration
--------N-631C-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 1Ch
        DS:DI -> ???
        ???
Return: ???
Note:   calls AH=17h with ???
SeeAlso: AH=17h
--------N-631D-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 1Dh
        ???
Return: ???
Range:  INT 4D to INT FC, selected by configuration
--------N-631E-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 1Eh
        DS:BX -> DWORD containing IP address (big-endian)
        ???
Return: CF clear if successful
        CF set on error
        ???
--------N-631F-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - SET SOCKET ??? HANDLER
        AH = 1Fh
        BX = socket number
        ES:SI -> FAR function for ???
Return: CF clear if successful
        CF set on error (out of slots)
SeeAlso: AH=20h
--------N-6320-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - REMOVE SOCKET ??? HANDLER
        AH = 20h
        BX = socket number
Return: CF clear if successful
        CF set on error (not set)
Range:  INT 4D to INT FC, selected by configuration
SeeAlso: AH=1Fh
--------N-6321-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 21h
        ES:SI -> ???
Return: ???
SeeAlso: INT 61/AH=1Ch"PC/TCP"
--------N-6322-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - REMOVE ??? HANDLER
        AH = 22h
Return: CF clear
Range:  INT 4D to INT FC, selected by configuration
Note:   decrements a counter if not already zero, and calls AH=0Ah with BL=11h
          if the counter reaches zero
--------N-6323-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 23h
        DS:BX -> ???
        ES:SI -> 6-byte buffer for ???
Return: CF clear if successful
        CF set on error
--------N-6324-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - GET SOCKET
        AH = 24h
Return: AX = socket number (0400h-FFFFh)
Range:  INT 4D to INT FC, selected by configuration
Note:   the Beame&Whiteside TCP/IP protocol stack uses two consecutive
          interrupts (62h and 63h by default); the BW-NFS client uses a third
          consecutive interrupt (64h by default) if it is loaded
SeeAlso: AH=12h,AH=14h,INT 62/AH=12h"ETHDEV",INT 64/AH=01h"BW-NFS"
--------N-6325-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - GET INTERNET ADDRESS
        AH = 25h
Return: CL:CH:DL:DH = caller's Internet address
SeeAlso: AH=03h,AH=26h,INT 61/AH=05h"PC/TCP"
--------N-6326-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - SET INTERNET ADDRESS???
        AH = 26h
        CL:CH:DL:DH = Internet address
Return: nothing
Range:  INT 4D to INT FC, selected by configuration
Note:   this function sets a different variable than AH=25h returns
SeeAlso: AH=03h,AH=25h
--------N-6327-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - SET ???
        AH = 27h
        BX = ???
        ES:SI -> ???
Return: ???
--------N-6328-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 28h
        ???
Return: ???
--------N-6329-------------------------------
INT 63 - BW-TCP - TCPIP.SYS - ???
        AH = 29h
        ???
Return: ???
Range:  INT 4D to INT FC, selected by configuration
Note:   the Beame&Whiteside TCP/IP protocol stack uses two consecutive
          interrupts (62h and 63h by default); the BW-NFS client uses a third
          consecutive interrupt (64h by default) if it is loaded
--------*-64---------------------------------
INT 64 - reserved for user interrupt
--------d-64---------------------------------
INT 64 - Adaptec controllers - DRIVE 1 DATA
Desc:   this vector stores the first four bytes of the parameter table for
          hard disk 1
Notes:  these vectors are used by the following Adaptec controllers:
            ACB 2370 A/B/C, ACB 2372 A/B/C, ACB 2333 A/B, 2322B-8, 2322B-16
        these vectors are NOT used by the following Adaptec controllers:
            ACB 2310, ACB 2312, ACB 2320D, ACB 2322D
SeeAlso: INT 60"Adaptec",INT 65"Adaptec",INT 66"Adaptec",INT 67"Adaptec"
--------b-64---------------------------------
INT 64 - TI Professional PC - OPTION ROM DATA AREA POINTER (NOT A VECTOR!)
Desc:   the low word of this vector contains the segment of the RAM data area
          to be used by the expansion ROM at F400h:6000h, and the high word
          contains the length of the data area; this segment and size are
          both set to 0000h if no ROM is installed at F400h:6000h
SeeAlso: INT 60"TI Professional PC",INT 63"TI Professional"
SeeAlso: INT 65"TI Professional PC"
----------64---------------------------------
INT 64 - Oracle SQL Protected Mode Executive - ???
--------N-64---------------------------------
INT 64 - Novell NetWare to v2.0a - LOW-LEVEL API
Note:   equivalent to INT 7A for NetWare versions through 2.0a only; later
          versions do not use this interrupt for IPX/SPX access, instead
          getting an entry point from INT 2F/AX=7A00h
SeeAlso: INT 2F/AX=7A00h,INT 7A"LOW-LEVEL API"
--------h-64---------------------------------
INT 64 - Data General DG10 - MicroECLIPSE COPROCESSOR INTERFACE
SeeAlso: INT 65"DG10",INT 66"DG10"
--------r-64---------------------------------
INT 64 - Extended Batch Language v3.14+
        AH = function
            00h to 5Fh chained to previous handler
            60h to 6Ch reserved, return immediately
            80h to FFh chained to previous handler
            6Dh (v4.01+) insert tone in queue
                AL = ???
                CX = frequency in Hertz
                DL = duration in clock ticks
                Return: AL = 00h if note stored
                           = 01h if no room to store
            6Eh clear ??? counter/flag
            6Fh return counter/flag that AH=6Eh clears
            70h ???
                AL = ???
            71h ???
                AL = ???
            72h ???
            73h insert byte at end of keyboard buffer
                AL = byte to insert
                Return: AL = 00h if byte inserted
                           = 01h if no room to store
            74h insert byte at front of keyboard buffer
                AL = byte to insert
                Return: AL = 00h if byte inserted
                           = 01h if no room to store
            75h ???
            76h get keyboard "stack" status
                AL = 'K' if kbd read will read physical keyboard
                     'S' if it will read EBL internal keyboard buffer
                AH = ???
            77h clear internal keyboard buffer
            78h ???
                AL = ???
            79h ???
            7Ah ???
                AL = ???
            7Bh ???
                AL = ???
            7Ch ???
                AL = ???
            7Dh ???
                AL = ???
            7Eh clear buffer for ???
            7Fh installation check
                Return: CX = version in BCD
                        DI = segment of ???
                        BX = segment of next program's PSP???
Program: Extended Batch Language is a batch-file enhancer by Seaware
Notes:  the chaining does not check whether the interrupt had been hooked
          before, so if you try to chain when the previous vector was
          0000h:0000h, you'll be in trouble
        functions 72h and 7Ah-7Dh appear to be interfaces to the optional
          floating-point and extended function packages
Index:  installation check;EBL|installation check;Extended Batch Language
--------d-64---------------------------------
INT 64 - Pdisk by Scott Garfinkle - Overwritten for Hard Drive information
Note:   This vector is overwritten by Pdisk to install custom harddrive types.
          It can either destroy 4 vectors and take no memory or TSR and take
          up some memory.
SeeAlso: INT 65"Pdisk"
----------64---------------------------------
INT 64 - PC-DRAFT - ASYNCHRONOUS DRIVER
        ???
Return: ???
Program: PC-DRAFT is a powerful CAD environment by rhv.
SeeAlso: INT 62"PC-DRAFT",INT 65"PC-DRAFT",INT 66"PC-DRAFT",INT 67"PC-DRAFT"
--------N-6401-------------------------------
INT 64 U - BW-NFS - BWRPC - ???
        AH = 01h
        ES:BX -> ??? (at least 8 bytes)
        ES:BP -> DWORD ???
        ???
Return: CF clear if successful
            ???
        CF set on error
            CX = 0000h
Range:  INT 4E to INT FD, selected by configuration
Notes:  the Beame&Whiteside TCP/IP protocol stack uses two consecutive
          interrupts (62h and 63h by default); the BW-NFS client uses a third
          consecutive interrupt (64h by default) if it is loaded
        the BWRPC installation check consists of determining the interrupt
          vector assigned to it (two more than the value returned by reading
          the ETHDEV27 device), and testing whether the word immediately
          preceding the interrupt handler is 4257h ('BW')
SeeAlso: INT 62/AH=00h"ETHDEV",INT 63/AH=03h"BW-TCP",INT 63/AH=24h
Index:  installation checks;BWRPC
--------N-6402-------------------------------
INT 64 U - BW-NFS - BWRPC - ???
        AH = 02h
        DS:DI -> ???
Return: ???
Note:   this call is passed directly through to INT 62/AH=07h
SeeAlso: INT 62/AH=07h"ETHDEV"
--------N-6403-------------------------------
INT 64 U - BW-NFS - BWRPC - ADD ???
        AH = 03h
        AL = ???
        BP = ???
        ES:SI -> ???
Return: ???
Note:   this call is passed directly through to INT 62/AH=0Bh
SeeAlso: AH=04h,INT 62/AH=0Bh"ETHDEV"
--------N-6404-------------------------------
INT 64 U - BW-NFS - BWRPC - REMOVE ???
        AH = 04h
        BP = ???
Return: ???
Range:  INT 4E to INT FD, selected by configuration
Note:   this call is passed directly through to INT 62/AH=0Ch
SeeAlso: AH=03h,INT 62/AH=0Ch"ETHDEV"
--------N-6405-------------------------------
INT 64 U - BW-NFS - BWRPC - ???
        AH = 05h
        CX = ???
Return: ???
Note:   this call is passed directly through to INT 62/AH=13h
SeeAlso: INT 62/AH=13h"ETHDEV"
--------N-6406-------------------------------
INT 64 U - BW-NFS - BWRPC - ???
        AH = 06h
        ES:SI -> ???
Return: AL = 00h if CF clear
Range:  INT 4E to INT FD, selected by configuration
Note:   this call is passed directly through to INT 62/AH=14h
SeeAlso: INT 62/AH=14h"ETHDEV"
--------N-6407-------------------------------
INT 64 U - BW-NFS - BWRPC - GET IP ADDRESS
        AH = 07h
Return: CX:DX = IP address
--------N-6410-------------------------------
INT 64 U - BW-NFS - BWRPC - CALL ETHDEV.SYS
        AH = 10h
        AL = ETHDEV function number
        other registers as appropriate for ETHDEV call
Return: as returned by ETHDEV
Note:   this call is passed directly through to INT 62
SeeAlso: INT 62/AH=00h"ETHDEV"
--------N-6411-------------------------------
INT 64 U - BW-NFS - BWRPC - NOP???
        AH = 11h
Return: CF clear
Range:  INT 4E to INT FD, selected by configuration
--------N-64FE-------------------------------
INT 64 - BW-NFS - BWRPC - MAP EMS PAGE FRAME
        AH = FEh
        AL = direction
            00h map in driver's memory block
            01h map out driver's memory block
Return: CF clear if successful
        CF set on error
            AL = error code
Range:  INT 4E to INT FD, selected by configuration
Note:   this call is passed through directly to ETHDEV.SYS (see INT 62/AH=FEh)
SeeAlso: INT 21/AH=3Fh"BW-TCP",INT 62/AH=FEh,INT 63/AH=03h"BW-TCP"
SeeAlso: INT 63/AH=24h
--------*-65---------------------------------
INT 65 - reserved for user interrupt
--------d-65---------------------------------
INT 65 - Adaptec controllers - DRIVE 1 DATA
Desc:   this vector stores the second four bytes of the parameter table for
          hard disk 1
SeeAlso: INT 64"Adaptec",INT 66"Adaptec",INT 67"Adaptec"
--------b-65---------------------------------
INT 65 - TI Professional PC - OPTION ROM DATA AREA POINTER (NOT A VECTOR!)
Desc:   the low word of this vector contains the segment of the RAM data area
          to be used by the expansion ROM at F400h:8000h, and the high word
          contains the length of the data area; this segment and size are
          both set to 0000h if no ROM is installed at F400h:8000h
SeeAlso: INT 60"TI Professional PC",INT 64"TI Professional"
SeeAlso: INT 66"TI Professional PC"
--------h-65---------------------------------
INT 65 - Data General DG10 - MicroECLIPSE COPROCESSOR INTERFACE
SeeAlso: INT 64"DG10",INT 66"DG10"
--------N-65---------------------------------
INT 65 - FTP Software NDIS-Packet Driver adapter - POST PROCESSING INTERRUPT
--------U-65---------------------------------
INT 65 - SD.COM v6.2
Desc:   The unregistered version of SD62.COM uses the low byte of this vector
          to count the number of invocations, displaying a registration
          reminder each time after the 20th use.
--------d-65---------------------------------
INT 65 - Pdisk by Scott Garfinkle - Overwritten for Hard Drive information
SeeAlso: INT 64"Pdisk",INT 66"Pdisk"
----------65---------------------------------
INT 65 - PC-DRAFT - SECONDARY DISPLAY DRIVER
        ???
Return: ???
Program: PC-DRAFT is a powerful CAD environment by rhv.
SeeAlso: INT 62"PC-DRAFT",INT 64"PC-DRAFT",INT 66"PC-DRAFT",INT 67"PC-DRAFT"
--------s-65---------------------------------
INT 65 - Ad Lib SOUND.COM - INTERFACE
        SI = function number (also see separate entries below)
            0000h Init
            0002h RelTimeStart
            0003h SetState
            0004h GetState
            0005h Flush
            0006h SetMode
            0007h GetMode
            0008h SetRelVolume
            0009h SetTempo
            000Ah SetTranspose
            000Bh GetTranspose
            000Ch SetActVoice
            000Dh GetActVoice
            000Eh PlayNoteDel
            000Fh PlayNote
            0010h SetTimbre
            0011h SetPitch
            0012h SetTickBeat
            0013h NoteOn
            0014h NoteOff
            0015h Timbre
            0016h SetPitchBend
            0017h WaveForm
        ES:BX -> arguments
InstallCheck:   test for the signature block immediately preceding the
          interrupt handler (see #03516)
SeeAlso: SI=8000h
Index:  installation check;Ad Lib SOUND.COM

Format of AdLib signature block:
Offset  Size    Description     (Table 03516)
 00h    WORD    version number
 02h 19 BYTEs   "SOUND-DRIVER-AD-LIB"
 15h    BYTE    01h
 16h    BYTE    01h
 17h    BYTE    00h
--------N-65----DX4147-----------------------
INT 65 U - NetSoft DOS-NET v1.20+ - ??? API
        DX = 4147h
        BH = 01h
        BL = function number (00h-2Ah)
        ???
Return: CF clear if successful
            AX = ???
        CF set on error
            AX = error code (0001h=invalid function/subfunction)
Range:  INT ?? to INT ??, selected by configuration option; actual interrupt
          number and function number may be retrieved via INT 2A/AX=4147h
Note:   this API is supported by CLIENT.COM, SERVER.COM, DOSNET.COM, and
          ROUTER.COM
SeeAlso: DX=4147h"INSTALLATION",INT 2A/AX=4147h
--------N-65----DX4147-----------------------
INT 65 U - NetSoft DOS-NET v1.20+ - ??? API
        DX = 4147h
        BH = 02h
        BL = function number (00h-05h)
        ???
Return: CF clear if successful
            AX = ???
        CF set on error
            AX = error code (0001h=invalid function/subfunction)
Range:  INT ?? to INT ??, selected by configuration option; actual interrupt
          number and function number may be retrieved via INT 2A/AX=4147h
Note:   this API is supported by CLIENT.COM, SERVER.COM, DOSNET.COM, and
          ROUTER.COM
SeeAlso: DX=4147h"INSTALLATION",INT 2A/AX=4147h
--------N-65----DX4147-----------------------
INT 65 U - NetSoft DOS-NET v1.20+ - ??? API
        DX = 4147h
        BH = 03h
        BL = function number (00h-03h) (00h-04h for ROUTER.COM)
        ???
Return: CF clear if successful
            AX = ???
        CF set on error
            AX = error code
Range:  INT ?? to INT ??, selected by configuration option; actual interrupt
          number and function number may be retrieved via INT 2A/AX=4147h
Note:   this API is supported by CLIENT.COM, SERVER.COM, DOSNET.COM, and
          ROUTER.COM
SeeAlso: DX=4147h"INSTALLATION",INT 2A/AX=4147h
--------N-65----DX4147-----------------------
INT 65 U - NetSoft DOS-NET v1.20+ - ??? API
        DX = 4147h
        BH = 04h
        BL = function number (00h-07h)
        ???
Return: CF clear if successful
            AX = ???
        CF set on error
            AX = error code
Range:  INT ?? to INT ??, selected by configuration option; actual interrupt
          number and function number may be retrieved via INT 2A/AX=4147h
Note:   this API is supported by CLIENT.COM, SERVER.COM, and DOSNET.COM
SeeAlso: DX=4147h"INSTALLATION",INT 2A/AX=4147h
--------N-65----DX4147-----------------------
INT 65 U - NetSoft DOS-NET v1.20+ - ??? API
        DX = 4147h
        BH = 07h
        BL = function number (00h-08h)
        ???
Return: CF clear if successful
            AX = ???
        CF set on error
            AX = error code (0001h=invalid function/subfunction)
Range:  INT ?? to INT ??, selected by configuration option; actual interrupt
          number and function number may be retrieved via INT 2A/AX=4147h
Note:   this API is supported by CLIENT.COM, SERVER.COM, and DOSNET.COM
SeeAlso: DX=4147h"INSTALLATION",INT 2A/AX=4147h
--------N-65----DX4147-----------------------
INT 65 U - NetSoft DOS-NET v1.20+ - INSTALLATION CHECK???
        DX = 4147h
        BH = 80h
Return: CF set
        AX = 0001h
Range:  INT ?? to INT ??, selected by configuration option; actual interrupt
          number and function number may be retrieved via INT 2A/AX=4147h
Note:   this call is supported by CLIENT.COM, SERVER.COM, and ROUTER.COM
SeeAlso: DX=4147h,INT 2A/AX=4147h
--------N-65----DX4741-----------------------
INT 65 U - NetSoft DOS-NET v1.20+ - SPOOLER - ???
        DX = 4741h
        BH = 01h
        AL = 02h
        BL = function number (0Eh,0Fh)
        AH = subfunction number
        ???
Return: ???
Range:  INT ?? to INT ??, selected by configuration option; actual interrupt
          number may be retrieved via INT 2A/AX=4147h
SeeAlso: DX=4147h"INSTALLATION",INT 2A/AX=4147h
--------N-65----DX4741-----------------------
INT 65 U - NetSoft DOS-NET v1.20+ - PRNREDIR - ???
        DX = 4741h
        BH = 01h
        AL = 03h
        BL = function number (0Eh,0Fh)
        AH = subfunction number
        ???
Return: ???
Range:  INT ?? to INT ??, selected by configuration option; actual interrupt
          number may be retrieved via INT 2A/AX=4147h
SeeAlso: DX=4147h"INSTALLATION",INT 2A/AX=4147h
--------N-65----DX4741-----------------------
INT 65 U - NetSoft DOS-NET v1.20+ - PRNREDIR - ???
        DX = 4741h
        BH = 01h
        AL = 04h
        BL = function number (0Eh,0Fh)
        AH = subfunction number
        ???
Return: ???
Range:  INT ?? to INT ??, selected by configuration option; actual interrupt
          number may be retrieved via INT 2A/AX=4147h
SeeAlso: DX=4147h"INSTALLATION",INT 2A/AX=4147h
--------N-65----DX4741-----------------------
INT 65 U - NetSoft DOS-NET v1.20+ - NETBIOS - ???
        DX = 4741h
        BH = 01h
        AL = 07h
        BL = function number (0Eh,0Fh)
        AH = subfunction number
        ???
Return: ???
Range:  INT ?? to INT ??, selected by configuration option; actual interrupt
          number may be retrieved via INT 2A/AX=4147h
SeeAlso: DX=4147h"INSTALLATION",INT 2A/AX=4147h
--------N-65----DX4741-----------------------
INT 65 U - NetSoft DOS-NET v1.20+ - MACTEST - ???
        DX = 4741h
        BH = 01h
        AL = 08h
        BL = function number (0Eh,0Fh)
        AH = subfunction number
        ???
Return: ???
Range:  INT ?? to INT ??, selected by configuration option; actual interrupt
          number may be retrieved via INT 2A/AX=4147h
SeeAlso: DX=4147h"INSTALLATION",INT 2A/AX=4147h
--------N-65----DX4741-----------------------
INT 65 U - NetSoft DOS-NET v1.20+ - Physical Layer - ???
        DX = 4741h
        BH = 02h
        BL = function number (01h-04h)
        ???
Return: ???
        ---function 02h---
        DS:SI -> ??? data area
Range:  INT ?? to INT ??, selected by configuration option; actual interrupt
          number may be retrieved via INT 2A/AX=4147h
Note:   this API is supported by PARALLEL.COM, SERIAL.COM, ARCNET.COM,
          ETHERNET.COM, NDIS.COM, ODI.COM, SMC.COM, and FTP.COM
SeeAlso: DX=4147h"INSTALLATION",INT 2A/AX=4147h
--------N-65----DX4741-----------------------
INT 65 U - NetSoft DOS-NET v1.20+ - SPOOLER.COM - ???
        DX = 4741h
        BH = 05h
        BL = function number (00h,01h)
Return: CF clear
        AL = status code (00h=successful)
Range:  INT ?? to INT ??, selected by configuration option; actual interrupt
          number may be retrieved via INT 2A/AX=4147h
SeeAlso: DX=4147h"INSTALLATION",INT 2A/AX=4147h
--------N-65----DX4741-----------------------
INT 65 U - NetSoft DOS-NET v1.20+ - PRNREDIR.COM - ???
        DX = 4741h
        BH = 06h
        BL = function number (00h-04h)
        ???
Return: ???
Range:  INT ?? to INT ??, selected by configuration option; actual interrupt
          number may be retrieved via INT 2A/AX=4147h
SeeAlso: DX=4147h"INSTALLATION",INT 2A/AX=4147h
--------N-65----DX4741-----------------------
INT 65 U - NetSoft DOS-NET v1.20+ - COMREDIR.COM - ???
        DX = 4741h
        BH = 08h
        BL = function number (00h-01h)
        ???
Return: ???
Range:  INT ?? to INT ??, selected by configuration option; actual interrupt
          number may be retrieved via INT 2A/AX=4147h
SeeAlso: DX=4147h"INSTALLATION",INT 2A/AX=4147h
--------N-65----DX4741-----------------------
INT 65 U - NetSoft DOS-NET v1.20+ - FTP.COM - ???
        DX = 4741h
        BX = 8010h
        AL = instance number???
Return: AX = 0008h if AL matches internal variable (call chained otherwise)
Range:  INT ?? to INT ??, selected by configuration option; actual interrupt
          number may be retrieved via INT 2A/AX=4147h
SeeAlso: DX=4147h"INSTALLATION",INT 2A/AX=4147h
--------s-65----SI0000-----------------------
INT 65 - Ad Lib SOUND.COM - INITIALIZE (RESET)
        SI = 0000h
--------s-65----SI0003-----------------------
INT 65 - Ad Lib SOUND.COM - SET STATE
        SI = 0003h
        ES:BX -> WORD new state (0000h disabled, 0001h enabled)
SeeAlso: SI=0004h
--------s-65----SI0004-----------------------
INT 65 - Ad Lib SOUND.COM - GET STATE
        SI = 0004h
Return: AX = status
            0000h all done playing sounds
            else  still playing sounds
SeeAlso: SI=0003h
--------s-65----SI0006-----------------------
INT 65 - Ad Lib SOUND.COM - SET MODE
        SI = 0006h
        ES:BX -> WORD new mode (0000h melodic, 0001h percussive)
SeeAlso: SI=0007h
--------s-65----SI0007-----------------------
INT 65 - Ad Lib SOUND.COM - GET MODE
        SI = 0007h
Return: AX = mode
            0000h melodic
            0001h percussive
SeeAlso: SI=0006h
--------s-65----SI000C-----------------------
INT 65 - Ad Lib SOUND.COM - SET ACTIVE VOICE
        SI = 000Ch
        ES:BX -> WORD voice = 0000h to 0008h
SeeAlso: SI=000Dh
--------s-65----SI000D-----------------------
INT 65 - Ad Lib SOUND.COM - GET ACTIVE VOICE
        SI = 000Dh
Return: AX = voice (0000h to 0008h)
SeeAlso: SI=000Ch
--------s-65----SI8000-----------------------
INT 65 u - Media Vision FM.COM v4.1a+ - GET INTERNAL DATA STRUCTURES
        SI = 8000h
Return: DX:AX -> internal data structures
Program: FM.COM is an Ad Lib SOUND.COM-compatible driver for Media Vision's
          Pro Audio Spectrum sound boards
SeeAlso: SI=8001h
--------s-65----SI8001-----------------------
INT 65 u - Media Vision FM.COM v4.1a+ - GET VOICE COUNT
        SI = 8001h
Return: AX = ???
        DX = number of voices??? (09h or 0Bh)
SeeAlso: SI=8000h
--------s-65----SI8002-----------------------
INT 65 - Media Vision FM.COM v4.1a+ - START BACKGROUND FM SOUNDS
        SI = 8002h
SeeAlso: SI=8003h
--------s-65----SI8003-----------------------
INT 65 - Media Vision FM.COM v4.1a+ - STOP BACKGROUND FM SOUNDS
        SI = 8003h
SeeAlso: SI=8002h
--------s-65----SI8004-----------------------
INT 65 U - Media Vision FM.COM v4.1a+ - GET ???
        SI = 8004h
Return: AX = ??? (0280h)
        DX = ??? (01A0h)
--------s-65----SI8005-----------------------
INT 65 U - Media Vision FM.COM v4.1a+ - ???
        SI = 8005h
        ???
Return: ???
SeeAlso: SI=8000h
--------S-65---------------------------------
INT 65 U - EZRECV v1.0 - API
        AX = function
            0000h ???
                Return: AX = ??? or FFFFh
            0001h ???
                Return: AX = status (0000h or 0001h)
            0002h ???
                Return: AX = status (0000h or 0001h)
            0003h set ??? to 0001h
                Return: AX = 0000h
            0004h ???
                Return: AX = ???
Return: BH = COM port being used
        BL = speed???
        CH = ???
        CL = ???
        DX = ???
        DS = ???
        ES = EZRECV data segment
Program: EZRECV is a background Zmodem file receiver by Express Consulting
--------*-66---------------------------------
INT 66 - reserved for user interrupt
--------d-66---------------------------------
INT 66 - Adaptec controllers - DRIVE 1 DATA
Desc:   this vector stores the third four bytes of the parameter table for
          hard disk 1
SeeAlso: INT 64"Adaptec",INT 65"Adaptec",INT 67"Adaptec"
--------b-66---------------------------------
INT 66 - TI Professional PC - SYSTEM INFORMATION (NOT A VECTOR!)
Desc:   the low word of this vector contains the system memory size in
          paragraphs; the third byte contains the number of outstanding
          interrupt requests, and the fourth byte contains a description
          of the installed drive types (see #03517)
SeeAlso: INT 60"TI Professional PC",INT 67"TI Professional"

Bitfields for TI Professional drive type information:
Bit(s)  Description     (Table 03517)
 7      floppy drive D: has 80 tracks
 6      floppy drive D: is double-sided
 5      floppy drive C: has 80 tracks
 4      floppy drive C: is double-sided
 3      floppy drive B: has 80 tracks
 2      floppy drive B: is double-sided
 1      floppy drive A: has 80 tracks
 0      floppy drive A: is double-sided
--------h-66---------------------------------
INT 66 - Data General DG10 - MicroECLIPSE COPROCESSOR INTERFACE
SeeAlso: INT 64"DG10"
--------N-66---------------------------------
INT 66 C - Nanosoft, Inc. TurboNET - NETWORK PROCESSING ???
Program: TurboNET is a NetBIOS-based file redirector and server
Note:   hooked but not used (IRET) by both redirector and server; called from
          server's INT 28 handler
SeeAlso: INT 2F/AX=8100h
--------d-66---------------------------------
INT 66 - Pdisk by Scott Garfinkle - Overwritten for Hard Drive information
SeeAlso: INT 64"Pdisk",INT 67"Pdisk"
--------W-66---------------------------------
INT 66 - Microsoft Windows VITD.386 Virtual Interval Timer
Note:   This Windows 3.x Virtual Device Driver implements a virtual timer
          which will expire and call INT 66.  This timer can be used to
          calculate elapsed execution time etc.
--------K-66---------------------------------
INT 66 - Newkey v5.4 - INSTALLATION VECTOR
Return: immediately (IRET)
Program: Newkey is a shareware keyboard macro program by Frank A. Bell
InstallCheck:   test for the signature bytes FDh FCh FFh FEh at offset 03h in
          the interrupt handlers segment
Range:  INT 60h to INT 67h, selected by scanning for highest unused vector
BUG:    the code obviously intends to use INT F0-FE, INT 70-77, and INT 68-6F
          before falling back to INT 60-67, but only uses the last of these
          ranges in v5.4
SeeAlso: INT 2F/AX=E300h
Index: installation checks;Newkey|Newkey;installation check
----------66---------------------------------
INT 66 - PC-DRAFT - TABLET/DIGITIZER DRIVER
        ???
Return: ???
Program: PC-DRAFT is a powerful CAD environment by rhv.
SeeAlso: INT 62"PC-DRAFT",INT 64"PC-DRAFT",INT 65"PC-DRAFT",INT 67"PC-DRAFT"
--------U-66---------------------------------
INT 66 - PC-Magazin - INCA
        details not yet availble
Program: INCA is a utility from PC-Magazin (the German edition of PC Magazine)
          issue 51-52/85.
SeeAlso: INT 61"SWAPx"
--------F-6601-------------------------------
INT 66 - BitFax Scheduler - SET MODE???
        AH = 01h
SeeAlso: AH=02h
--------F-6602-------------------------------
INT 66 - BitFax Scheduler - SET MODE???
        AH = 02h
SeeAlso: AH=01h
--------F-6603-------------------------------
INT 66 - BitFax Scheduler - SCHEDULE FAX TRANSMISSIONS
        AH = 03h
        ???
Return: ???
SeeAlso: AH=05h
--------F-6604-------------------------------
INT 66 - BitFax Scheduler - GET STATUS???
        AH = 04h
Return: AX = ??? (0000h or 0001h)
        DX = BitSched version???  (for versions >= 3.00)
            9796h (ver. 3.00)
            97E6h (ver. 3.02)
            92D0h (ver. 3.04.06)
            9510h (ver. 3.06.02)
SeeAlso: AH=06h,AX=3345h,INT 2F/AX=8000h"FaxBIOS"
--------F-6605-------------------------------
INT 66 - BitFax Scheduler - CONVERT FILE AND SEND FAX
        AH = 05h
        BX:CX -> command block (see #03518)
        ???
Return: ???
SeeAlso: AH=03h

Format of BitFax command block:
Offset  Size    Description     (Table 03518)
 00h 18 BYTEs   configuration bytes???
 12h    BYTEs   ASCIZ temporary file name to place converted fax
 52h    BYTEs   ASCIZ directory containing BitFax executables
 92h    BYTEs   ASCIZ telephone number
 C2h    BYTE    cover page control (00h don't send, 01h do send cover page)
 C3h 15 BYTEs   configuration bytes???
 E2h    BYTEs   ASCIZ path of BITFAX.TRA file (containing additional
                  configuration information???)
122h    BYTEs   configuration bytes???
12Ch    BYTE    00h don't send cover page
                01h send cover page
12Dh  7 BYTEs   configuration bytes???
134h    BYTEs   ASCIZ path of file to send
174h    BYTEs   more configuration bytes???
        ???
--------F-6606-------------------------------
INT 66 - BitFax Scheduler - SET MODE???
        AH = 06h
Return: DX = BitSched version??? (same as AH=04h)
SeeAlso: AH=04h
--------s-660688-----------------------------
INT 66 - IBMSND driver, DIGPAK - PLAY 8-BIT DIGITIZED SOUND
        AX = 0688h
        DS:SI -> SNDSTRUC (see #03519)
Return: ???
Program: The IBMSND driver is part of John W. Ratcliff's
           The IBM Digitized Sound Package
        DIGPAK is a set of digitized sound drivers written by
          John W. Ratcliff, The Audio Solution, Inc.
InstallCheck:   test for a valid signature string six bytes prior to the
          interrupt handler; this string may be either "KERN" or "MIDI" (in
          the latter case, call AX=0701h to determine whether IBMSND is
          installed)
SeeAlso: AX=068Bh,AX=068Fh,AX=0701h

Format of IBMSND driver SNDSTRUC:
Offset  Size    Description     (Table 03519)
 00h    DWORD   -> audio data
 04h    WORD    length of audio data in bytes
 06h    DWORD   -> playback status flag
 0Ah    WORD    playback frequency
--------s-660689-----------------------------
INT 66 - IBMSND driver, DIGPAK - REPORT SOUND DRIVER STATUS
        AX = 0689h
Return: AX = status
            0000h no sound playing
            0001h sound effect is currently playing
        ---DIGPAK---
        BX = version number (v3.1+)
        DX = looping status
            0000h no sound looping
            0001h sound effect is currently looping
SeeAlso: AX=0688h,AX=068Bh,AX=068Ch
Index:  version check;DIGPAK
--------s-66068A-----------------------------
INT 66 - IBMSND driver, DIGPAK - PREFORMAT SOUND
        AX = 068Ah
        DS:SI -> SNDSTRUC (see #03519)
Desc:   convert audio data into output hardware format
SeeAlso: AX=068Bh
--------s-66068B-----------------------------
INT 66 - IBMSND driver, DIGPAK - PLAY PREFORMATTED SOUND
        AX = 068Bh
        DS:SI -> SNDSTRUC (see #03519)
Return: AX = ???
SeeAlso: AX=0688h,AX=068Ah,AX=068Fh
--------s-66068C-----------------------------
INT 66 - IBMSND driver, DIGPAK - REPORT AUDIO DRIVER CAPABILITIES
        AX = 068Ch
Return: AX = capabilities (see #03520)
        DX = playback rate if fixed-frequency playback
        ---DIGPAK---
        BX:CX -> ASCIZ ID string
SeeAlso: AX=0689h,AX=068Dh

Bitfields for IBMSND driver capabilities:
Bit(s)  Description     (Table 03520)
 0      can play audio in background
 1      data is massaged for output device
 2      driver plays at fixed frequency, resampling input data to fit
 3      driver uses timer interrupt
---DIGPAK---
 4      device supports timer sharing
 5      supports looped sounds and pending
 6      supports stereo panning
 7      supports 8-bit PCM stereo playback
 8      supports audio recording
 9      supports DMA bakcfilling
--------s-66068D-----------------------------
INT 66 - IBMSND driver, DIGPAK - REPORT CURRENT SAMPLE ADDRESS
        AX = 068Dh
Return: AX = current playback address
Desc:   determine what point in the audio data the playback has reached, for
          synchronization with video or animation effects
Notes:  this function applies to background playback only
        the reported address may be an approximation rather than the exact
          address
SeeAlso: AX=068Ch,AX=0691h
--------s-66068E-----------------------------
INT 66 - IBMSND driver, DIGPAK - SET CALLBACK ADDRESS
        AX = 068Eh
        BX:DX -> callback function
            0000h:0000h to disable callback
        DS = value to load into DS when calling the callback function
Desc:   specify the function to be called when playback of a sound effect is
          completed
Note:   the callback function will typically be called during a hardware
          interrupt, so all the usual precautions should be taken except for
          preserving registers
SeeAlso: AX=0691h
--------s-66068F-----------------------------
INT 66 - IBMSND driver, DIGPAK - STOP CURRENT SOUND
        AX = 068Fh
Desc:   cause any currently-playing sound effect to be terminated
SeeAlso: AX=0688h,AX=068Bh
--------s-660690-----------------------------
INT 66 - IBMSND driver, DIGPAK - "SetAudioHardware" - SET UP HARDWARE INFO
        AX = 0690h
        BX = IRQ
        CX = base address
        DX = other setup value (device-dependent???)
--------s-660691-----------------------------
INT 66 - IBMSND driver, DIGPAK - REPORT CALLBACK ADDRESS
        AX = 0691h
Return: AX:DX -> current callback function
        BX = original caller's DS register
Program: The IBMSND driver is part of John W. Ratcliff's
           The IBM Digitized Sound Package
        DIGPAK is a set of digitized sound drivers written by
          John W. Ratcliff, The Audio Solution, Inc.
SeeAlso: AX=068Eh
--------s-660693-----------------------------
INT 66 - DIGPAK - SET TIMER DIVISOR RATE
        AX = 0693h
        DX = rate
Program: DIGPAK is a set of digitized sound drivers written by
          John W. Ratcliff, The Audio Solution, Inc.
--------s-660694-----------------------------
INT 66 - DIGPAK - PLAY PREFORMATTED DATA
        AX = 0694h
        DS:SI -> Sound Data structure (see #03519)
Return: AX = status???
--------s-660695-----------------------------
INT 66 - DIGPAK - POST AUDIO PENDING
        AX = 0695h
        DS:SI -> Sound Data structure (***)
Return: AX = status
            0000h sound started playing
            0001h sound was posted as pending to play
            0002h sound effect already pending, this one not posted
SeeAlso: AX=0696h
--------s-660696-----------------------------
INT 66 - DIGPAK - GET AUDIO PENDING STATUS
        AX = 0696h
Return: AX = status
            0000h no sound is playing
            0001h sound playing, and a sound is pending
            0002h sound playing, no sound pending
SeeAlso: AX=0695h
--------s-660697-----------------------------
INT 66 - DIGPAK - SET STEREO PANNING
        AX = 0697h
        DX = panning position (0 = right, 127 = left)
Return: AX = status
            0000h command ignored (not supported)
            0001h panning set
--------s-660698-----------------------------
INT 66 - DIGPAK - SET PLAY MODE
        AX = 0698h
        DX = playback mode
            0000h 8-bit PCM
            0001h 8-bit stereo PCM
            0002h 16-bit PCM
            0003h 16-bit stereo PCM
Return: AX = status
            0000h command ignored
            0001h mode set
--------s-660699-----------------------------
INT 66 - DIGPAK - GET ADDRESSES
        AX = 0699h
Return: AX = pending address
        BX = semaphore address
--------s-66069A-----------------------------
INT 66 - DIGPAK - SET RECORD MODE
        AX = 069Ah
        DX = recording mode
            0000h turn audio recording on
            0001h turn audio recording off
Return: AX = status
            0000h command ignored
            0001h audio recording mode set
--------s-66069B-----------------------------
INT 66 - DIGPAK - STOP NEXT LOOP
        AX = 069Bh
--------s-66069C-----------------------------
INT 66 - DIGPAK - SET DMA BACKFILL MODE
        AX = 069Ch
        DX = mode
            0000h turn backfill mode on
            0001h turn backfill mode off
Return: AX = status
            0000h command ignored
            0001h backfill mode set
SeeAlso: AX=069Dh,AX=069Eh
--------s-66069D-----------------------------
INT 66 - DIGPAK - REPORT DMA COUNTER
        AX = 069Dh
Return: AX = DMA counter
SeeAlso: AX=069Eh
--------s-66069E-----------------------------
INT 66 - DIGPAK - VERIFY DMA BLOCK
        AX = 069Eh
        CX = length of buffer
        ES:BX -> buffer containing sound data
Return: AX = status
            0000h block crosses 64K bounadary
            0001h block is OK
SeeAlso: AX=069Dh
--------s-66069F-----------------------------
INT 66 - DIGPAK - SET PCM VOLUME
        AX = 069Fh
        BX = left channel volume (0-100)
        CX = right channel volume (0-100)
Return: AX =  status
            0000h command ignored
            0001h volume set
--------s-6606A0-----------------------------
INT 66 - DIGPAK - SET DPMI MODE
        AX = 06A0h
        DX = mode
            0000h 32-bit register addressing on
            0001h 32-bit register addressing off
SeeAlso: INT 31/AX=0400h
--------s-660700-----------------------------
INT 66 - MIDPAK - UNINSTALL
        AX = 0700h
Note:   this function should NOT be called by applications
Program: MIDPAK is a set of MIDI sound drivers developed by Miles Design
          Incorporated.
--------s-660701-----------------------------
INT 66 - IBM Digitized Sound Package MIDI driver - GET DIGITIZED SOUND CAPABIL
        AX = 0701h
Return: AX = digitized sound capabilities
            0000h if digitized sound driver (functions 06xxh) not available
InstallCheck:   test for the signature "MIDI" six bytes before the interrupt
          handler
Note:   also supported by MIDPAK, the successor to the Digitized Sound
          Package's MIDI driver
SeeAlso: AX=0688h
--------s-660702-----------------------------
INT 66 - MIDPAK - PLAY SEQUENCE
        AX = 0702h
        BX = Sequence number
Return: AX = status
            0000h Sequence is being played
            0001h Sequence not available
SeeAlso: AX=0703h,AX=0705h
--------s-660703-----------------------------
INT 66 - MIDPAK - SEGUE SEQUENCE
        AX = 0703h
        BX = sequence number
        CX = activation code (FFFFh is next trigger)
Return: ???
--------s-660704-----------------------------
INT 66 - MIDPAK - REGISTER XMIDI
        AX = 0704h
        CX:BX -> XMIDI sequence data
        DI:SI = length of XMIDI data
Return: AX = status
            0000h unable to register XMIDI data
            0001h XMIDI file registered resident
            0002h XMIDI file was registered to the application
--------s-660705-----------------------------
INT 66 - MIDPAK - STOP MIDI
        AX = 0705h
SeeAlso: AX=0702h,AX=0709h
--------s-660706-----------------------------
INT 66 O - MIDPAK - REMAP CHANNEL
        AX = 0706h
        BX = sequence
        CX = physical
--------s-660707-----------------------------
INT 66 - MIDPAK - REPORT TRIGGER EVENT COUNTER
        AX = 0707h
Return: AX = count of number of callbacks since last reset
        DX = ID
SeeAlso: AX=0708h,AX=0713h
--------s-660708-----------------------------
INT 66 - MIDPAK - RESET EVENT TRIGGER COUNTER
        AX = 0708h
SeeAlso: AX=0707h,AX=0713h
--------s-660709-----------------------------
INT 66 O - MIDPAK - MIDI SLEEP
        AX = 0709h
SeeAlso: AX=070Ah
--------s-66070A-----------------------------
INT 66 O - MIDPAK - MIDI AWAKE
        AX = 070Ah
SeeAlso: AX=0709h
--------s-66070B-----------------------------
INT 66 - MIDPAK - RESUME PLAYING
        AX = 070Bh
SeeAlso: AX=070Ch
--------s-66070C-----------------------------
INT 66 - MIDPAK - GET SEQUENCE STATUS
        AX = 070Ch
Return: AX = status
            0000h sequence stopped
            0001h sequence playing
            0002h sequence done
SeeAlso: AX=070Bh
--------s-66070D-----------------------------
INT 66 - MIDPAK - REGISTER XMIDI FILE
        AX = 070Dh
        CX:BX -> ASCII filename
SeeAlso: AX=0704h,AX=0710h
--------s-66070E-----------------------------
INT 66 - MIDPAK - GET RELATIVE VOLUME
        AX = 070Eh
Return: AX = current volume
SeeAlso: AX=070Fh
--------s-66070F-----------------------------
INT 66 - MIDPAK - SET RELATIVE VOLUME
        AX = 070Fh
        BX = new volume
        CX = time
SeeAlso: AX=070Eh
--------s-660710-----------------------------
INT 66 - MIDPAK - LOAD MIDPAK DRIVER
        AX = 0710h
        BX = segment of .ADV driver
        CX = 0000h (offset must be zero)
        DX:SI -> .AD driver
SeeAlso: AX=070Dh
--------s-660711-----------------------------
INT 66 - MIDPAK - POLL MIDPAK
        AX = 0711h
Return: AX = ???
        ???
SeeAlso: AX=0712h
--------s-660712-----------------------------
INT 66 - MIDPAK - GET MIDI CLOCK
        AX = 0712h
Return: AX:DX = clock counter
        CX:BX = clock address
SeeAlso: AX=0711h,AX=0713h
--------s-660713-----------------------------
INT 66 - MIDPAK - GET TRIGGER COUNT ADDRESS
        AX = 0713h
Return: AX:DX -> trigger counter address
SeeAlso: AX=0707h,AX=0712h,AX=0714h
--------s-660714-----------------------------
INT 66 - MIDPAK - GET EVENT ID ADDRESS
        AX = 0714h
Return: AX:DX -> event ID
SeeAlso: AX=0713h,AX=0716h
--------s-660716-----------------------------
INT 66 - MIDPAK - REPORT SEQUENCE NUMBER
        AX = 0716h
Return: AX = current sequence number
SeeAlso: AX=0702h
Program: MIDPAK is a set of MIDI sound drivers developed by Miles Design
          Incorporated.
--------n-6610-------------------------------
INT 66 - PenDOS - TDMOUSE.EXE - GET ???
        AH = 10h
Return: CF clear
        AX = 0000h
        BX = ??? (0012h)
        DX:CX -> TDMOUSE INT 33 handler (IRET to hide mouse from other apps)
Program: TDMOUSE is a PenDOS hardware driver which allows a mouse to emulate
          a touchpad; PenDOS is a set of programs by Communication Intelligence
          Corporation which makes applications pen-aware
--------n-6611-------------------------------
INT 66 - PenDOS - TDMOUSE.EXE - SET ??? HANDLER
        AH = 11h
        DX:BX -> new handler for ???
Return: CF clear
        AX = 0000h
        DX:BX -> old handler for ??? (points at RETF by default)
--------n-6612-------------------------------
INT 66 - PenDOS - TDMOUSE.EXE - INITIALIZE
        AH = 12h
Return: CF clear
        AX = 0000h
Note:   this function calls the old mouse handler with functions 0000h, 0002h,
          0007h, 0008h, 000Fh, 0004h, and 000Ch (in that order)
SeeAlso: AH=13h
--------n-6613-------------------------------
INT 66 - PenDOS - TDMOUSE.EXE - SHUTDOWN???
        AH = 13h
Return: CF clear
        other register as returned by INT 33/AX=0000h
SeeAlso: AH=12h
--------n-6614-------------------------------
INT 66 - PenDOS - TDMOUSE.EXE - ???
        AH = 14h
        BX = ???
        CX = ???
Return: CF clear
        AX = 0000h
--------n-6615-------------------------------
INT 66 - PenDOS - TDMOUSE.EXE - SET ??? HANDLER
        AH = 15h
        DX:BX -> new handler for ???
Return: CF clear
        AX = 0000h
        DX:BX -> old handler (points at RETF by default)
--------n-6616-------------------------------
INT 66 - PenDOS - TDMOUSE.EXE - UNUSED FUNCTIONS
        AH = 16h to 1Fh
Return: CF set
Program: TDMOUSE is a PenDOS hardware driver which allows a mouse to emulate
          a touchpad; PenDOS is a set of programs by Communication Intelligence
          Corporation which makes applications pen-aware
--------n-6621-------------------------------
INT 66 - PenDOS - PINK - ???
        AH = 21h
Return: CF clear if successful
        CF set on error
Note:   this function sets ??? flag or counter (also set by AH=2Fh) to FFFFh
--------n-6622-------------------------------
INT 66 - PenDOS - PINK - ???
        AH = 22h
        DX:BX -> ???
        CL = ???
Return: CF clear if successful
        CF set on error
        ???
SeeAlso: AH=24h
--------n-6623-------------------------------
INT 66 - PenDOS - PINK - ???
        AH = 23h
        ???
Return: CF clear if successful
        CF set on error
        ???
--------n-6624-------------------------------
INT 66 - PenDOS - PINK - ???
        AH = 24h
        DX:BX -> ???
        CL = ???
Return: CF clear if successful
        CF set on error
        ???
SeeAlso: AH=22h
--------n-6625-------------------------------
INT 66 - PenDOS - PINK - ???
        AH = 25h
        CL = ??? (NOP if 00h)
        ???
Return: CF clear if successful
        CF set on error
        ???
--------n-6627-------------------------------
INT 66 - PenDOS - PINK - ???
        AH = 27h
        BL = ???
        BH = ???
        CL = ??? (0-3)
        DL = ??? (> BL)
        DH = ??? (> BH)
Return: ???
--------n-6628-------------------------------
INT 66 - PenDOS - PINK - ???
        AH = 28h
        ???
Return: CF clear if successful
        CF set on error
        ???
Note:   this function sets ??? flag or counter (also set by AH=2Fh) to FFFFh
--------n-6629-------------------------------
INT 66 - PenDOS - PINK - ???
        AH = 29h
        ???
Return: ???
Note:   this function sets ??? flag or counter (also set by AH=2Fh) to FFFFh
--------n-662A-------------------------------
INT 66 - PenDOS - PINK - ???
        AH = 2Ah
        DL = ??? (nonzero)
        DH = ??? (nonzero)
Return: CF clear if successful
        CF set on error
        ???
--------n-662B-------------------------------
INT 66 - PenDOS - PINK - ???
        AH = 2Bh
        ???
Return: CF clear if successful
        CF set on error
        ???
--------n-662F-------------------------------
INT 66 - PenDOS - PINK - INITIALIZE
        AH = 2Fh
        ???
Return: AX = status
            0000h failed
            FFFFh successful
        ???
Note:   this function sets ??? flag or counter to FFFFh and hooks INT 1Ch
--------F-663345-----------------------------
INT 66 - BitFax Scheduler - REMOVE TSR FROM MEMORY
        AX = 3345h
Return: AX = FFFFh error removing TSR
InstallCheck:   test for the signature "BitFax Scheduler" beginning two bytes
          past the interrupt handler
SeeAlso: AH=04h,INT 2F/AH=2Ah,INT 2F/AX=CB00h
Index:  installation check;BitFax Scheduler
--------n-6640-------------------------------
INT 66 - PenDOS - PKEYUS - GET VERSION
        AH = 40h
Return: CF clear
        AX = 0000h
        BH = major version (02h for version bundled with IBM DOS 6.1)
        BL = minor version (00h for version bundled with IBM DOS 6.1)
        DL = ??? (4Eh)
        DH = ??? (0Eh)
--------n-6641-------------------------------
INT 66 - PenDOS - PKEYUS - SET ???
        AH = 41h
        BX = ???
        CL = ??? (08h-20h)
        DL = screen column??? (<= 50h)
        DH = screen row???  (<= 3Ch)
Return: AX = status (0000h successful, 0001h error)
Note:   this function also sets an internal flag
SeeAlso: AH=42h,AH=43h
--------n-6642-------------------------------
INT 66 - PenDOS - PKEYUS - ???
        AH = 42h
Return: CF clear
        AX = 0000h
Note:   this function also clears the flag set by AH=41h
SeeAlso: AH=41h
--------n-6643-------------------------------
INT 66 - PenDOS - PKEYUS - ???
        AH = 43h
        BX = ???
        DX = ???
Return: AX = status
            0000h if AH=41h flag set
            else
                AH = ???
                AL = ???
                BX = ???
                DX = ???
SeeAlso: AH=41h
--------n-6644-------------------------------
INT 66 - PenDOS - PKEYUS - UNUSED FUNCTIONS
        AH = 44h to 4Fh
Return: CF set
--------n-6650-------------------------------
INT 66 - PenDOS - PMOUSE - SET ???
        AH = 50h
        BX = ???
        CH = ???
        DX = ???
Return: CF clear
        AX = 0000h
--------n-6651-------------------------------
INT 66 - PenDOS - PMOUSE - NOP
        AH = 51h
Return: CF set
--------n-6652-------------------------------
INT 66 - PenDOS - PMOUSE - ???
        AH = 52h
        BX = ???
        CL = ???
        DX = ???
Return: ???
--------n-6653-------------------------------
INT 66 - PenDOS - PMOUSE - UNUSED FUNCTIONS
        AH = 53h to 57h
Return: CF set
--------n-66---------------------------------
INT 66 - PenDOS - PMOUSE - ALTERNATE API
        AH = function (58h-5Fh)
Note:   these functions exactly duplicate AH=50h-57h
--------U-66AA02-----------------------------
INT 66 - HelpTSR v2.10 - INSTALLATION CHECK
        AX = AA02h
Return: ES:DI -> 7 byte signature "HelpTSR" if resident
Program: HelpTSR is a resident viewer by David Jurgens for HelpPC
--------n-66C5-------------------------------
INT 66 - PenDOS - VLOAD - API
        AH = C5h
        ???
Return: ???
--------t-66FFFBBXFFFB-----------------------
INT 66 - MicroHelp Stay-Res Plus - ???
        AX = FFFBh
        BX = FFFBh
        ???
Return: ???
SeeAlso: AX=FFFEh,INT 2D"AMIS"
--------t-66FFFEBXFFFE-----------------------
INT 66 - MicroHelp Stay-Res/Stay-Res Plus - UNINSTALL
        AX = FFFEh
        BX = FFFEh
Return: only if unsuccessful
InstallCheck:   test whether the interrupt handler begins with the bytes
          FBh 9Ch or 9Ch FAh, and the program name (not case-sensitive) appears
          at offset 0005h (older versions) or the offset returned by
          AX=FFFFh/BX=FFF0h in the interrupt handler segment
Note:   Programs which use Stay-Res include ThesPlus (program name "THESPLUS")
          and Personal Calendar (program name "CAL") by Paul Mun~oz-Colman.
SeeAlso: AX=FFFBh,AX=FFFFh,INT 2D"AMIS"
Index:  installation check;MicroHelp Stay-Res|installation check;ThesPlus
Index:  installation check;Personal Calendar|installation check;CAL
--------t-66FFFFBXFFF0-----------------------
INT 66 - MicroHelp Stay-Res Plus - FIND PROGRAM NAME
        AX = FFFFh
        BX = FFF0h
Return: DI = offset of program name in interrupt handler segment
SeeAlso: AX=FFFBh,AX=FFFEh,INT 2D"AMIS"
--------d-67---------------------------------
INT 67 - Adaptec controllers - DRIVE 1 DATA
Desc:   this vector stores the last four bytes of the parameter table for
          hard disk 1
SeeAlso: INT 64"Adaptec",INT 65"Adaptec",INT 66"Adaptec"
--------b-67---------------------------------
INT 67 - TI Professional PC - SYSTEM DATA (NOT A VECTOR!)
Desc:   this vector contains the TI Pro's system configuration words
          (see #03521)
SeeAlso: INT 66"TI Professional PC"

Bitfields for TI Professional PC System Configuration doubleword:
Bit(s)  Description     (Table 03521)
 0      8087 present
 31-1   reserved (0)
--------d-67---------------------------------
INT 67 - Pdisk by Scott Garfinkle - Overwritten for Hard Drive information
SeeAlso: INT 64"Pdisk",INT 66"Pdisk"
--------I-67---------------------------------
INT 67 - Sangoma CCPOP 3270 resident module
SeeAlso: INT 61"Sangoma",INT 68"Sangoma"
--------U-67---------------------------------
INT 67 - CUCKOO.COM - INSTALLATION CHECK
Program: CUCKOO is a resident on-screen clock with optional hourly chime or
          cuckoo by an unknown author with revisions by Thomas A. Lundin
Note:   this is not a vector; when loaded for the first time, CUCKOO.COM uses
          the last unused (0000h:0000h) vector in the range 60h-67h to store
          the signature value 434Ch:4F4Bh ('CLOK')
----------67---------------------------------
INT 67 - PC-DRAFT - KEYBOARD DRIVER
        ???
Return: ???
Program: PC-DRAFT is a powerful CAD environment by rhv.
SeeAlso: INT 62"PC-DRAFT",INT 64"PC-DRAFT",INT 65"PC-DRAFT",INT 66"PC-DRAFT"
--------N-6700-------------------------------
INT 67 - PC-NET, Alloy NTNX - LOCK SEMAPHORE AND WAIT
        AH = 00h
        DS:DX -> ASCIZ semaphore name (max 64 bytes)
Return: AL = status (see #03522)
        AH = semaphore owner if status=02h
SeeAlso: AH=01h,AH=02h"PC-NET",INT 7F/AH=00h

(Table 03522)
Values for PC-NET semaphore function status:
 00h    successful
 01h    invalid function
 02h    semaphore already locked
 03h    unable to lock semaphore
 04h    semaphore space exhausted
--------N-6701-------------------------------
INT 67 - PC-NET, Alloy NTNX - LOCK SEMAPHORE
        AH = 01h
        DS:DX -> ASCIZ semaphore name (max 64 bytes)
Return: AL = status (see #03522)
        AH = semaphore owner if status=02h
SeeAlso: AH=00h,AH=02h"PC-NET",INT 7F/AH=01h"Alloy"
--------N-6702-------------------------------
INT 67 - PC-NET, Alloy NTNX - UNLOCK SEMAPHORE
        AH = 02h
        DS:DX -> ASCIZ semaphore name (max 64 bytes)
Return: AL = status (see #03522)
        AH = semaphore owner if status=02h
SeeAlso: AH=00h,AH=01h"PC-NET",INT 7F/AH=02h
--------m-671E-------------------------------
INT 67 U - Qualitas 386MAX v7.00 - MEMLIMIT - INSTALLATION CHECK
        AH = 1Eh
Return: AH = 00h if installed
            AL destroyed
            ES:DI -> ASCII signature "MemLimit"
SeeAlso: AH=1Fh,INT 21/AX=4402h"386MAX"
--------m-671F-------------------------------
INT 67 U - Qualitas 386MAX v7.00 - MEMLIMIT - API
        AH = 1Fh
        DS:SI -> request packet (see #03523)
Return: AH = status (00h successful, 84h invalid function code, etc.)
SeeAlso: AH=1Eh

Format of 386MAX MEMLIMIT request packet:
Offset  Size    Description     (Table 03523)
 00h    WORD    function code (00h-0Fh)
 02h    WORD    return code (see #03524)
 04h  4 BYTEs   ???
 08h    WORD    ???
        ???

(Table 03524)
Values for 386MAX MEMLIMIT return code:
 00h    unknown request
 01h    invalid parameter for VCPI limit
 02h    VCPI limit set
 03h    invalid parameter for EMS limit
 04h    EMS limit set
 05h    DPMI disabled
 06h    XMS disabled
 07h    XMS limit set
 08h    unable to uninstall
 09h    unloaded
--------m-672763CL01-------------------------
INT 67 - VIDEMS.SYS v1.31+ - INSTALLATION CHECK
        AX = 2763h
        CL = 01h
        BX = signature AAFFh
Return: AH = 00h if VIDEMS is installed
            CH = 00h if optimization for 80286 is used, 01h otherwise
            CL = internal revision number (typically 00h to 03h)
            DX = driver version (DH=major, DL=minor; not a BCD!)
        AH = 84h if not installed but EMS manager is present
Program: VIDEMS is an expanded memory manager from Conea Software Corp. It
         converts video adapter RAM to LIM 3.2 EMS.
SeeAlso: AX=2763h/CL=02h,AX=2763h/CL=03h
--------m-672763CL02-------------------------
INT 67 - VIDEMS.SYS v1.31+ - FLUSH EMS TO VIDEO RAM
        AX = 2763h
        CL = 02h
        BX = signature AAFFh
Return: AH = 00h if successful
Notes:  This call is normally used by Conea products only.
SeeAlso: AX=2763h/CL=01h,AX=2763h/CL=03h
--------m-672763CL03-------------------------
INT 67 - VIDEMS.SYS v1.31+ - RELOAD EMS FROM VIDEO RAM
        AX = 2763h
        CL = 03h
        BX = signature AAFFh
Return: AH = 00h if successful
Notes:  This call is normally used by Conea products only.
SeeAlso: AX=2763h/CL=01h,AX=2763h/CL=03h
--------m-672763CL04-------------------------
INT 67 - VIDEMS.SYS v1.31+ - RETURN HIDDEN BLOCK SIZE
        AX = 2763h
        CL = 04h
        BX = signature AAFFh
Return: AH = 00h if successful
            DX = block size in kilobytes
Desc:   Returns the amount of EMS which can be safely used at any time, and
          can't be destroyed by writing anything to the B800:0000 buffer.
Note:   this function normally returns 184K, while the driver provides up to
          240K of EMS.
SeeAlso: AX=2763h/CL=01h,AX=2763h/CL=02h
--------m-672763CL05-------------------------
INT 67 - VIDEMS.SYS v1.31+ - RETURN PHYSICAL PAGE SIZE
        AX = 2763h
        CL = 05h
        BX = signature AAFFh
Return: AH = 00h
        DX = size in bytes
Desc:   Used by Conea products to determine if addressing mode has changed.
          Normally, all VIDEMS versions beginning from 1.15 use 4K "physical"
          pages.
Notes:  this function will probably become raw page size in future releases of
          VIDEMS, which will support the LIM 4.0 standard.
SeeAlso: AX=2763h/CL=01h,AX=2763h/CL=02h
--------m-672763CL06-------------------------
INT 67 - VIDEMS.SYS v1.50+ - RETURN VIDEO RAM SIZE
        AX = 2763h
        CL = 06h
        BX = signature AAFFh
Return: AH = 00h
        DX = total amount of video RAM
Desc:   beginning with version 1.50, VIDEMS can use more adapter memory on
          some chipsets, and is no longer limited to the first 240K.
Notes:  this call is not officially documented, and Conea programmers use it
          mainly for debugging purposes.
--------u-672833-----------------------------
INT 67 - Q87 v4+ - PREPARE TO UNLOAD AND GET XMS HANDLE FOR Q87 MEMORY
        AX = 2833h
        EAX = 29482833h (entire EAX value required)
Return: EAX = XMS handle for memory allocated when Q87 was installed
        EBX = status
            00000000h Q87 is in demo mode (countdown running);
                          Q87 remains active
            00000001h Q87 is in registered mode; memory manager's IDT, GDT,
                          and optionally CR0 (if BL <> 5Fh on entry) have
                          been restored
            00000002h Q87 is in demo mode (demo time has expired);
                          Q87 remains active
Note:   this call is used by UNLOAD87 to release the memory used by Q87
BUG:    v4.00-v4.03 will hang on most machines when run under bare DOS with
          no memory manager, because neither Q87 nor UNLOAD87 checks whether
          there is a valid INT 67 handler before performing an installation
          check via INT 67
SeeAlso: AX=4321h,INT 21/AX=4321h/BX=0000h
--------m-673F--CX5145-----------------------
INT 67 U - QEMM-386 v4.23+ - INSTALLATION CHECK
        AH = 3Fh
        CX = 5145h ("QE")
        DX = 4D4Dh ("MM")
Return: AH = 00h if installed
            ES:DI -> QEMM API entry point (see #03525,#03528,#03640)
Notes:  if no other program has hooked INT 67, an alternate installation
          check is to test for the string
          "QUARTERDECK EXPANDED MEMORY MANAGER 386" at offset 14h in the INT 67
          handler's segment; the word at offset 12h contains the offset in
          the handler's segment of the API entry point
        although this function is still undocumented, Quarterdeck has recently
          documented two alternate methods for determining the QEMM API entry
          point, as well as several of the API functions
        MICEMM (Micronics Expanded Memory Manager) versions 2.0C and 4D support
          the alternate QEMM installation check and entry point functions 00h,
          02h, and 03h; version 4D only provides the signature string if the
          commandline argument "DV" is provided
        386MAX v6.01 responds to this call, but DESQview 2.42 does not
          recognize the returned entry point as providing QEMM's capabilities
          because a) only functions 0Ch (different from QEMM 0Ch) and
                        1000h-1009h are supported,
                  b) status is returned as for EMS functions, not QEMM funcs
                  c) the protected-mode entry point returned by function 1000h
                        only supports functions 0Ch, 1004h, 1005h, and 100Ah
        the string check mentioned above is not supported by 386MAX
SeeAlso: AX=5BF0h,AH=DDh,AX=FFA5h,INT 15/AX=11DEh,INT 21/AX=4402h/SF=01h
SeeAlso: INT 21/AX=4402h"QEMM",INT 21/AX=4402h"386MAX",INT 2F/AX=D201h/BX=5145h

(Table 03525)
Values for calling QEMM "QPI_GetStatus" function:
        AH = 00h get QEMM state
Return: CF clear
        AL = QEMM state
            bit 0 set if QEMM turned OFF
            bit 1 set if in "Auto" mode
Note:   this function is officially documented
SeeAlso: #03526,#03527,#03528,#03640

(Table 03526)
Values for calling QEMM "QPI_SetStatus" function:
        AH = 01h set QEMM state
        AL = new state
            bit 0 set: place QEMM in OFF state
Return: CF clear if successful
        CF set on error
Note:   this function is officially documented
SeeAlso: #03525

(Table 03527)
Values for calling QEMM QPI function 02h:
        AH = 02h get ???
Return: CF clear
        AX = segment of ??? data structure
        Data Structure
        Offset  Size    Description
         00h    DWORD   page table entry for ???
                ???
SeeAlso: #03528

(Table 03528)
Values for calling QEMM "QPI_GetVersion" function:
        AH = 03h get QEMM version
Return: CF clear
        AX = BX = version in BCD
Notes:  this function is officially documented.  The most recent official docs
          state that the version is returned in both AX and BX; older
          documentation only mentions BX
        MICEMM returns AX=0001h, BX unchanged
SeeAlso: #03525,#03529

(Table 03529)
Values for calling QEMM QPI function 04h:
        AH = 04h allocate 4K page and set AUTO/ON mode
Return: CF clear if successful
            DX = page number of a 4K page
        CF set if unable to allocate page
Note:   QEMM mode unchanged if not AUTO/OFF
SeeAlso: #03530

(Table 03530)
Values for calling QEMM QPI function 05h:
        AH = 05h free 4K page and turn QEMM off
        DX = page number returned by function 04h
Return: CF clear
Note:   QEMM mode unchanged if not AUTO/ON
SeeAlso: #03529,#03531

(Table 03531)
Values for calling QEMM QPI function 06h:
        AH = 06h make new mapping context???
        DX = page number of 4K page to hold page table
Return: CF clear
Note:   copies page table into given page and then sets ??? page table entry
          to point at copy
SeeAlso: #03532,#03533

(Table 03532)
Values for calling QEMM QPI function 07h:
        AH = 07h get mapping context
Return: CF clear
        DX = page number of page table for current mapping context
SeeAlso: #03528,#03531,#03533

(Table 03533)
Values for calling QEMM QPI function 08h:
        AH = 08h set mapping context???
        DX = linear page number of page table
Return: CF clear
SeeAlso: #03528,#03531,#03532,#03534,#03536

(Table 03534)
Values for calling QEMM QPI function 09h:
        AH = 09h get linear page number for page table entry
        CX = page table index
Return: CF clear
        DX = linear page number
SeeAlso: #03535

(Table 03535)
Values for calling QEMM QPI function 0Ah:
        AH = 0Ah set linear page number for page table entry
        CX = page table index
        DX = linear page number
Return: CF clear
SeeAlso: #03534

(Table 03536)
Values for calling QEMM QPI function 0Bh:
        AH = 0Bh map 4K pages
        BX = number of pages
        CX = first page number (must be 0100h to allocate HMA)
        DX = EMS handle (memory belonging to EMS handle will be mapped
              into the address space beginning with the first page
              allocated to the handle)
Return: AH = 00h
SeeAlso: #03533,#03537

(Table 03537)
Values for calling QEMM QPI function 0Ch:
        AH = 0Ch get available memory
Return: CF clear
        BX = 0001h
        CX = total 4K pages???
        DX = number of 4K pages free
SeeAlso: #03536,#03538

(Table 03538)
Values for calling QEMM QPI function 0Dh:
        AH = 0Dh CRT controller I/O port trapping
        AL = mode
            00h only trap on I/O ports 03C0h-03C5h, 03C7h, 03CAh-03CFh
            01h trap on ports 03B4h, 03B5h, 03B8h, 03C6h, 03C8h, 03C9h,
                  03D4h, and 03D5h
            02h only trap on I/O ports 03C6h, 03C8h, and 03C9h
Return: CF clear

(Table 03539)
Values for calling QEMM QPI function 0Eh:
        AH = 0Eh set cursor virtualization callbacks
        DS:BX -> FAR routine for getting hardware cursor address
        ES:DX -> FAR routine for setting hardware cursor address
Return: CF clear
Note:   both callbacks are invoked with CL indicating which
          CRT controller register to access (0Eh for high
          byte of cursor address, 0Fh for low byte)
        the DS:BX callback should return BX=cursor address;
          ES:DX is called with BL or BH (depending on CL)
          set to the appropriate half of the cursor's address

(Table 03540)
Values for calling QEMM QPI function 0Fh:
        AH = 0Fh unmap 4K pages
        CX = first page number
        DX = number of pages
Return: CF clear
        AL = 00h/01h if ???
Note:   if CX=0100h and DX=0010h, the HMA is remapped to
          simulate a disabled A20

(Table 03541)
Values for calling QEMM QPI function 1000h:
        AX = 1000h get protected-mode interface
        DS:SI -> 16-byte buffer for two GDT entries
        ES:DI -> buffer for 4K page table
Return: CF clear
        EAX = offset of protected-mode API entry point
        DS:SI buffer filled with two GDT descriptors
                first is QEMM code segment, second is data???
        ES:DI buffer filled with 4K page table
        DI points to first unused page table entry
SeeAlso: INT 67/AX=DE01h

(Table 03542)
Values for calling QEMM QPI function 1001h:
        AX = 1001h get CPU debug registers
        ES:DI -> buffer for debug registers (8 DWORDs)
Return: CF clear
        BL = INT01 handling (see #03543)
        ES:DI buffer filled

(Table 03543)
Values for calling QEMM QPI function 1002h:
        AX = 1002h set CPU debug registers
        BL = INT01 handling
            00h  reflect all debugging exceptions as V86-mode INT 01's
            else convert debugging exceptions other than single-step
                  into V86-mode INT 03's, single-step to INT 01's
        ES:DI -> buffer containing debug registers (8 DWORDs)
Return: CF clear
Notes:  identical to INT 67/AX=DE09h if BL=01h
        the INT01 handling flag is set to 01h by the general-protection
          violation handler for certain privileged instructions
SeeAlso: #03542

(Table 03544)
Values for calling QEMM QPI function 1003h:
        AX = 1003h get machine status word CR0
Return: CF clear
        EAX = contents of CR0
SeeAlso: INT 67/AX=DE07h

(Table 03545)
Values for calling QEMM QPI function 1004h:
        AX = 1004h allocate a 4K page
Return: CF clear if successful
            EDX = linear address of allocated page
        CF set on error
SeeAlso: INT 67/AX=DE04h

(Table 03546)
Values for calling QEMM QPI function 1005h:
        AX = 1005h free 4K page
        EDX = linear address of page to free
Return: CF clear
SeeAlso: INT 67/AX=DE05h

(Table 03547)
Values for calling QEMM QPI function 1006h:
        AX = 1006h NOP
Return: CF set

(Table 03548)
Values for calling QEMM QPI function 1007h:
        AX = 1007h get maximum physical memory address
Return: CF clear
        EDX = physical address of highest 4K memory page
SeeAlso: INT 67/AX=DE02h

(Table 03549)
Values for calling QEMM QPI function 1008h:
        AX = 1008h get physical address of page in first megabyte
        CX = page number (linear address shifted right 12 bits)
Return: CF clear
        EDX = linear address of page
SeeAlso: #03548,#03624,#03625

(Table 03550)
Values for calling QEMM QPI function 1009h:
        AX = 1009h switch to protected mode
        ESI = linear address in first megabyte of system reg values
              (see INT 67/AX=DE0Ch)
        interrupts disabled
Return: interrupts disabled
        GDTR, IDTR, LDTR, TR loaded
        SS:ESP must have at least 16 bytes space, and the
              entry point is required to set up a new stack
              before enabling interrupts
        EAX, ESI, DS, ES, FS, GS destroyed

(Table 03551)
Values for calling QEMM QPI function 100Ah:
        AX = 100Ah switch back to virtual-86 mode
        DS = selector for data segment from function 1000h
        SS:ESP in first megabyte of linear memory
        interrupts disabled
        STACK:  QWORD  return address from FAR call to 32-bit segment
                DWORD  EIP
                DWORD  CS
                DWORD  reserved for EFLAGS
                DWORD  ESP
                DWORD  SS
                DWORD  ES
                DWORD  DS
                DWORD  FS
                DWORD  GS
        will switch to virtual86 mode with interrupts disabled, all
          segment registers loaded, and EAX destroyed.

(Table 03552)
Values for calling QEMM QPI function 11h:
        AH = 11h get memory type map
        AL = zero/nonzero ??? (set by QEMM.COM but apparently ignored
              by QEMM 6.00)
        ES:DI -> 256-byte buffer for memory types
Return: CF clear
        BL = ???
        ES:DI buffer filled
Note:   each byte of the buffer corresponds to a 4K page, and
          contains the type of that page: 00h = mappable,
          02h = mapped ROM, 03h = high RAM, 04h = excluded,
          05h = video, 06h = ROM, 07h = adapter ROM,
          08h = split ROM, 09h = page frame, 0Ah = RAMmable,
          0Bh = conventional, 83h = high RAM under MS Windows

(Table 03553)
Values for calling QEMM QPI function 12h:
        AH = 12h get HIRAM chain
Return: CF clear
        BX = segment of first MCB in high memory
            0000h if no high memory

(Table 03554)
Values for calling QEMM QPI function 1300h:
        AX = 1300h VIDRAMEGA???
        BL = 00h copy ???
             nonzero copy ??? (reverse)
Return: CF clear
        AL = status
            00h if all pages clean
            01h if any page dirty

(Table 03555)
Values for calling QEMM QPI function 1301h:
        AX = 1301h check if pages modified
        DX:DI = start address of range to check
        CX = length of range in paragraphs
Return: CF clear
        CX = status
            0000h none of the indicated pages is dirty
                DI destroyed
            1000h one or more pages is dirty
                DI = low word of first dirty page's linear addr

(Table 03556)
Values for calling QEMM QPI function 1302h:
        AX = 1302h ???
        BL = ???
        BH = ???
        CX = ???
        SI = offset of ???
        DI = offset of ???
        ???
Return: CF clear
        ???
Note:   disables certain interrupts at the two 8259 PICs during
          execution; also modifies CRT controller during
          execution under certain circumstances

(Table 03557)
Values for calling QEMM QPI function 1303h:
        AX = 1303h initialize EGA graphics virtualization
        BX = number of pages (less 1) of EMS to allocate
Return: CF clear if successful
            DX = EMS handle
        CF set on error

(Table 03558)
Values for calling QEMM QPI function 1304h:
        AX = 1304h shutdown EGA graphics virtualization
        DX = EMS handle being used for virtualization
Return: CF clear

(Table 03559)
Values for calling QEMM QPI function 1305h:
        AX = 1305h select portion of EGA graphics to virtualize???
        (related to graphics virtualization, changes memory mappings)
        CX = start offset within A000h segment of virtualized mem???
Return: CF clear
Note:   disables certain interrupts at the two 8259 PICs during
          execution (see #03566) and runs inside a QEMM
          critical section

(Table 03560)
Values for calling QEMM QPI function 1306h:
        AX = 1306h set DESQview critical section counter address
        ES:BX -> WORD DESQview critical section counter or 0000h:0000h
Return: CF clear
Note:   also sets a pointer in the low-memory part of QEMM to
          the current value of INT 15 if ES:BX not 0000h:0000h

(Table 03561)
Values for calling QEMM QPI function 1307h:
        AX = 1307h ??? (changes memory mappings for entire A000h segment)
Return: CF clear
Note:   disables certain interrupts at the two 8259 PICs during
          execution (see #03566) and runs inside a QEMM
          critical section

(Table 03562)
Values for calling QEMM QPI function 1308h:
        AX = 1308h start/reset CRT controller I/O trapping
        BL = subfunction
            00h restore CRTC I/O port trapping to previous state
            else start trapping all accesses to I/O ports 03B0-03DF
Return: CF clear
Note:   if called more than once in a row with BL nonzero, the
          original state of the I/O port trapping will be lost

(Table 03563)
Values for calling QEMM QPI function 1309h:
        AX = 1309h Hercules mode-change support
        ES:BX -> new address for Hercules mode-change callback
Return: CF clear
Note:   the callback function is called whenever the CRTC mode
          register is written, with AL set to the value written

(Table 03564)
Values for calling QEMM QPI function 130Ah:
        AX = 130Ah virtualize EGA/VGA DAC registers (I/O ports 03C8h/03C9h)
        CX:DX -> DAC register virtualization buffer (see #03647)
                or 0000h:0000h to disable
Return: CF clear

(Table 03565)
Values for calling QEMM QPI function 130Bh:
        AX = 130Bh ???
        BL = ??? (??? or 00h)
Return: CF clear
        ???
Note:   calls AX=130Eh in some cases

(Table 03566)
Values for calling QEMM QPI function 130Ch:
        AX = 130Ch set interrupts to mask
        BX = interrupts to mask out during AX=1302h,AX=1307h,AX=1308h,
              AX=130Dh,AX=1310h (BL = master PIC, BH = slave PIC)
Return: CF clear

(Table 03567)
Values for calling QEMM QPI function 130Dh:
        AX = 130Dh map EGA memory at A0000h
        ???
Return: CF clear
Note:   disables certain interrupts at the two 8259 PICs during execution
          (see #03566) and runs inside a QEMM critical section
        calls AX=1307h (see #03561)

(Table 03568)
Values for calling QEMM QPI function 130Eh:
        AX = 130Eh ??? (modifies CRT controller setup)
        ???
Return: CF clear

(Table 03569)
Values for calling QEMM QPI function 130Fh:
        AX = 130Fh reset ???
Return: CF clear

(Table 03570)
Values for calling QEMM QPI function 1310h:
        AX = 1310h copy modified pages to physical video RAM???
        ???
Return: CF clear
Note:   disables certain interrupts at the two 8259 PICs during execution
          (see #03566) and runs inside a QEMM critical section
        also calls AX=130Dh (see #03567)

(Table 03571)
Values for calling QEMM QPI function 1311h:
        AX = 1311h set ???
        BL = zero/nonzero???
Return: CF clear
Note:   certain operations will be performed with interrupts
          (as set by AX=130Ch) enabled rather than disabled if
          called with BL nonzero

(Table 03572)
Values for calling QEMM QPI function 1312h:
        AX = 1312h (v6.02) NOP???
Note:   called by DV 2.42, but appears to be a NOP in QEMM 6.02

(Table 03573)
Values for calling QEMM QPI function 1400h:
        AX = 1400h initialize DESQview "protection level" support
        ES:DI -> protection level configuration (at least 24 bytes)
                (see #03641)
        BL = highest ??? to return (one less than number of words)
Return: CF clear
        AX = ??? (4204h for v6.00)
Note:   QEMM also sets the protected mode INT 02 and INT 06
          vectors to alternate handlers in certain cases

(Table 03574)
Values for calling QEMM QPI function 1401h:
        AX = 1401h turn off DESQview protection level support
                Return: CF clear
                        ???
                Notes:  clears the DV critical-section flag address set with
                          function 1306h
                        QEMM also sets the protected mode INT 02 and INT 06
                          vectors to the default handlers if they had been
                          revectored by function 1400h

(Table 03575)
Values for calling QEMM QPI function 1402h:
        AX = 1402h set protection level???
                BL = protection level???
                    00h NOP
                    01h ???
                    02h ???
                    other (03h) ???
                ES:DI -> ???
                Return: CF clear
                        ???
                Format of Data structure:
                Offset  Size    Description
                 00h    WORD    segment of ??? (X, word at X:0136h set to X)
                 02h    WORD    segment of ??? (word at X:0124h set to this)
                 04h    WORD    number of paragraphs of ???
                 06h  3 WORDs   ??? (copied to X:0000h)
                 0Ch    WORD    ???

(Table 03576)
Values for calling QEMM QPI function 1403h:
        AX = 1403h add ??? to end of list and ??? (execute func 1406h)
                ES:DI -> ??? structure added to end of ??? list
                        (at least 31 bytes, DWORD at offset 06h used for
                         storing pointer to next struc, WORD at offset 00h
                         seems to be a key or index)
                Return: CF clear

(Table 03577)
Values for calling QEMM QPI function 1404h:
        AX = 1404h NOP
                Return: CF clear

(Table 03578)
Values for calling QEMM QPI function 1405h:
        AX = 1405h remove ??? from ??? list
                BX = key???
                Return: CF clear

(Table 03579)
Values for calling QEMM QPI function 1406h:
        AX = 1406h ???
                ???
                Return: CF clear
                        ???
                Notes:  this function is a NOP unless protection level 2 or 3
                          is active
                        when not a NOP, one of the actions is to write-protect
                          certain memory pages

(Table 03580)
Values for calling QEMM QPI function 1407h:
        AX = 1407h ???
                ???
                Return: CF clear
                        ???
                Note:   same as function 1406h, but only does anything if
                          protection level 2 is active

(Table 03581)
Values for calling QEMM QPI function 1408h:
        AX = 1408h unprotect???
                ???
                Return: CF clear
                        ???

(Table 03582)
Values for calling QEMM QPI function 1409h:
        AX = 1409h abort program causing protection violation???
                ???
                Return: CF clear
                        ???

(Table 03583)
Values for calling QEMM QPI function 140Ah:
        AX = 140Ah set ???
                BX = index of ???
                Return: CF clear
                        ???
                Notes:  no range checking is performed on BX
                        this function is a NOP unless protection level 3 active

(Table 03584)
Values for calling QEMM QPI function 140Bh:
        AX = 140Bh get ???
                BX = index of ???
                SI = 0000h
                Return: CF clear
                        SI = segment of 256-byte buffer??? or 0000h
                Notes:  no range checking is performed on BX
                        this function is a NOP unless protection level 3 active

(Table 03585)
Values for calling QEMM QPI function 15h:
        AH = 15h set timer channel 0 virtualization buffer
                ES:BX -> WORD buffer for timer channel 0 divisor
                        0000h:0000h to disable virtualization
                Return: CF clear

(Table 03586)
Values for calling QEMM v5.00+ QPI function 1600h:
        AX = 1600h get memory access status
                ES:DI -> 256-byte buffer
                Return: ES:DI buffer filled
                Note:   each byte of the buffer indicates the status of a 4K
                          page (bit 0 set if read, bit 1 set if written)

(Table 03587)
Values for calling QEMM v5.00+ QPI function 1601h:
        AX = 1601h set memory access status
                ES:DI -> 256-byte buffer containing access statuses (see #03586)

(Table 03588)
Values for calling QEMM v5.00+ QPI function 17h:
        AH = 17h get memory usage statistics
                ES:DI -> 81-byte buffer for memory statistics (see #03645)
                Return: CF clear

(Table 03589)
Values for calling QEMM v5.11+ QPI function 18h:
        AH = 18h check whether conventional memory mapped into address range
                ES:BX = starting address
                CX = number of 4K pages
                Return: CF clear
                        AL = 00h one or more pages is remapped
                             01h all pages in range are conventional memory
                                (physical address == virtual address)

(Table 03590)
Values for calling QEMM v5.11+ QPI function 19h:
        AH = 19h NOP
                Return: CF set

(Table 03591)
Values for calling QEMM v5.11+ "QPI_UntrappedIORead" function:
        AX = 1A00h get byte from I/O port
        DX = port number
Return: CF clear
        BL = port value
Note:   this function was officially documented with the release of QEMM 7.50

(Table 03592)
Values for calling QEMM v5.11+ "QPI_UntrappedIOWrite" function:
        AX = 1A01h send byte to I/O port
        BL = value to send
        DX = port number
Return: CF clear
Note:   this function was officially documented with the release of QEMM 7.50

(Table 03593)
Values for calling QEMM v5.11+ "QPI_UntrappedIOReadIndexed" function:
        AX = 1A02h
        BH = index value to send
        DX = base port number
Return: CF clear
        BL = value read from I/O port (DX+1)
Note:   this function was officially documented with the release of QEMM 7.50

(Table 03594)
Values for calling QEMM v5.11+ "QPI_UntrappedIOWriteIndexed" function:
        AX = 1A03h send bytes to two consecutive I/O ports
        BH = value for first I/O port (DX)
        BL = value for second I/O port (DX+1)
        DX = base port number
Return: CF clear
Note:   this function was officially documented with the release of QEMM 7.50

(Table 03595)
Values for calling QEMM v7.03+ "QPI_UntrappedIO" function:
        AX = 1A04h
        BX = value to write to port
        CX = direction and size
            bit 2: output instead of input
            bit 3: word instead of byte
        DX = I/O port to be accessed
Return: CF clear
        BX = value read (if CX indicates read)
Note:   this function was officially documented with the release of QEMM 7.50

(Table 03596)
Values for calling QEMM v7.03+ function 1A05h
        AX = 1A05h
        ???
Return: ???

(Table 03597)
Values for calling QEMM v7.03+ "QPI_GetIOCallback" function:
        AX = 1A06h
Return: CF clear
        ES:DI -> current I/O callback function (see #03599)
Note:   this function was officially documented with the release of QEMM 7.50

(Table 03598)
Values for calling QEMM v7.03+ "QPI_SetIOCallback" function:
        AX = 1A07h
        ES:DI -> new I/O callback function (see #03599)
Return: CF clear
Note:   this function was officially documented with the release of QEMM 7.50

(Table 03599)
Values QEMM v7.03+ I/O callback function is called with:
        AL/AX = data to/from trapped port
        CL = I/O direction (00h = IN instruction, else OUT instruction)
        DX = I/O port address
Return: CF clear if port handled by callback function
        CF set if not handled
        all other registers returned to application executing the IN or OUT
          instruction (allowing arbitrary changes to port address, data value,
          etc.)
SeeAlso: #03597,#03598

(Table 03600)
Values for calling QEMM v7.03+ "QPI_GetPortTrap" function:
        AX = 1A08h
        DX = I/O port number
Return: CF clear
        BL = trapping state (00h not being trapped, 01h trap installed)
Note:   this function was officially documented with the release of QEMM 7.50

(Table 03601)
Values for calling QEMM v7.03+ "QPI_SetPortTrap" function:
        AX = 1A09h
        DX = I/O port number
Return: CF clear
Note:   this function was officially documented with the release of QEMM 7.50

(Table 03602)
Values for calling QEMM v7.03+ "QPI_ClearPortTrap" function:
        AX = 1A0Ah
        DX = I/O port number
Return: CF clear
Note:   this function was officially documented with the release of QEMM 7.50

(Table 03603)
Values for calling QEMM v5.11+ QPI function 1B00h:
        AX = 1B00h get EMM Import Structure address
        ES:DI -> buffer for EMM import data structure (see #03643)
Return: CF set on error
        CF clear if successful
SeeAlso: INT 21/AX=4402h/SF=01h

(Table 03604)
Values for calling QEMM v5.11+ QPI function 1B01h:
        AX = 1B01h disable V86 mode
Return: CF set on error
            (i.e. no Global EMM Import rec. allocated)
        CF clear if successful
Note:   shuts down EMS and initializes Global EMM Import record; this function
          is invoked from the callback supplied by INT 2F/AX=1605h

(Table 03605)
Values for calling QEMM v5.11+ QPI function 1B02h:
        AX = 1B02h enable V86 mode
Return: CF set on error
        CF clear if successful
Note:   restarts EMS and frees Global EMM Import record; this function is
          invoked from the callback supplied by INT 2F/AX=1605h

(Table 03606)
Values for calling QEMM v5.11+ QPI function 1B03h:
        AX = 1B03h MS Windows initializing
        CX = segment from which Windows init broadcast made???
        DX = Windows startup flags
        DI = Windows version number (major in upper byte)
Return: CF clear if successful
            DS:SI -> V86 mode enable/disable callback
                  (see #02634 at INT 2F/AX=1605h)
            ES:BX -> startup info structure (see #02631 at INT 2F/AX=1605h)
        CF set on error (unable to start Windows)
SeeAlso: INT 2F/AX=1605h

(Table 03607)
Values for calling QEMM v5.11+ QPI function 1B04h:
        AX = 1B04h MS Windows terminating
Return: CF clear

(Table 03608)
Values for calling QEMM v5.11+ QPI function 1B05h:
        AX = 1B05h determine whether program is driver
        DS:DX -> ASCIZ filename
Return: CF clear
        AL = status
            01h if string ends in ".DRV"
            FFh if string ends in "GDI.EXE"
            00h otherwise
Note:   when MS Windows 3.0 standard mode starts, QEMM patches all drivers
          until GDI.EXE is loaded

(Table 03609)
Values for calling QEMM v5.11+ QPI function 1B06h:
        AX = 1B06h patch protected-mode check in Windows driver
        CX = length of data pointed at by DS:DX
        DS:DX -> buffer containing Windows driver code
Return: CF clear
Note:   patches all SMSW x/TEST x,1 instruction sequences into MOV x,CS/VERW x
          sequences, which has the effect that the protected-mode check will
          only indicate protected mode in native protected mode and not in V86
          mode

(Table 03610)
Values for calling QEMM v5.11+ QPI function 1B07h:
        AX = 1B07h
BUG: QEMM 6.00-7.01 accept this and branch randomly

(Table 03611)
Values for calling QEMM v5.11+ QPI function 1Bxxh:
        AX = 1B08h to 1BFFh
Return: CF set

(Table 03612)
Values for calling QEMM v5.11+ QPI function 1C00h:
        AX = 1C00h disable IRQ0-7 calldowns
Return: CF clear

(Table 03613)
Values for calling QEMM v5.11+ QPI function 1C01h:
        AX = 1C01h set V86-mode IRQ0-7 handlers
        ES:DI -> 8 DWORDs containing V86-mode handler addresses
Return: CF clear

(Table 03614)
Values for calling QEMM v5.11+ QPI function 1C02h:
        AX = 1C02h disable IRQ8-15 handlers
Return: CF clear

(Table 03615)
Values for calling QEMM v5.11+ QPI function 1C03h:
        AX = 1C03h set V86-mode IRQ8-15 handlers
        ES:DI -> 8 DWORDs containing V86-mode handler addresses
BUG:    although the jump table only contains four entries, QEMM 6.00 will
          attempt to use it for any value of AL between 00h and 2Ah, thus
          branching unpredictably for AL=04h-2Ah; QEMM v7.01 behaves
          similarly for AL=04h-1Bh
Note:   when enabled, the appropriate IRQs are reflected back to the specified
          handlers in virtual-86 mode after the CPU automatically invokes the
          protected-mode handler inside QEMM

(Table 03616)
Values for calling QEMM v7.03+ "QPI_SimulateHWInt" function:
        AX = 1C04h
        BX = number of interrupt to simulate
Return: ???
Notes:  this function will allow proper simulation of a hardware interrupt
          under DESQview and DESQview/X, where the correct interrupt handler
          may be in a different process with a completely different address
          space
        this function was officially documented with the release of QEMM v7.50

(Table 03617)
Values for calling QEMM v6.0x only QPI function 1D00h:
        AX = 1D00h switch to pre-Stealth interrupt vector table
Return: CF clear if supported (QEMM v6.x)
        CF set if not supported (QEMM v7+)
Notes:  also switches VGA Save table pointer (0040h:00A8h) and overwrites the
          vectors currently assigned for use by the two interrupt controllers
          (see INT 67/AX=DE0Ah) with the vectors for INT 08-0F and 70-77 (to
          avoid crashing the system).
        functions 1Dxxh are not supported by QEMM v7.01, and always return CF
          set

(Table 03618)
Values for calling QEMM v6.0x only QPI function 1D01h:
        AX = 1D01h restore user interrupt vector table
Return: CF clear if supported (QEMM v6.x)
        CF set if not supported (QEMM v7+)
Notes:  interrupts should be disabled around the AX=1D00h and AX=1D01h calls
          because QEMM does not modify the memory maps to map in ROM, so
          an interrupt could be disastrous
        clears any pending IRQ7 at end of function
        functions 1Dxxh are not supported by QEMM v7.01, and always return CF
          set

(Table 03619)
Values for calling QEMM v6.00+ QPI function 1Dxxh:
        AX = 1D02h to 1DFFh
Return: CF set

(Table 03620)
Values for calling QEMM v6.00+ "QEMM_GET_INFO"/"QPI_GetInfo" function:
        AX = 1E00h get Stealth configuration
Return: CF clear
        BL = memory configuration flags (documented as "reserved") (see #03644)
        BH = (v7.00+) disk buffer flags
            bit 0: DISKBUFFRAME buffer instead of DISKBUF buffer
            bit 1: buffer has already been used
        CL = stealth type (00h none, 46h Frame, 4Dh Map, 50h Protect)
        CH = suspend/resume interrupt (00h none)
        DL = (v7.00+) size of QEMM disk buffer in KB (00h none)
        DH = reserved (always 00h for v6.00)
        SI = reserved (always 0000h for v6.00)
        DI = reserved (always 0000h for v6.00)
Note:   this function is officially documented

(Table 03621)
Values for calling QEMM v6.00+ "QPI_GetStealthCount" function:
        AX = 1E01h get number of Stealth'ed ROMs
Return: CF clear
        BX = number of Stealth'ed ROMs
Note:   this function is officially documented

(Table 03622)
Values for calling QEMM v6.00+ "QPI_GetStealthList" function:
        AX = 1E02h
        ES:DI -> buffer for Stealth ROM info (see #03646)
Return: CF clear
        BX = number of Stealth'ed ROMs
        ES:DI buffer filled
Note:   this function is officially documented

(Table 03623)
Values for unimplemented Stealth information functions:
        AX = 1E03h to 1EFFh
Return: CF set


(Table 03624)
Values for calling QEMM v6.00+ "QEMM_GET_PTE"/"QPI_GetPTE" function:
        AX = 1F00h get page table entry
        CX = page number (0000h-010Fh)
Return: CF clear
        EDX = page table entry
Note:   this function is officially documented

(Table 03625)
Values for calling QEMM v6.00+ "QEMM_SET_PTE"/"QPI_SetPTE" function:
        AX = 1F01h set page table entry
        CX = page number (0000h-010Fh)
        EDX = new page table entry
Return: CF clear
Note:   this function is officially documented
SeeAlso: #03549

(Table 03626)
Values for calling QEMM v6.00+ QPI function 1Fxxh:
        AX = 1F02h to 1FFFh
Return: CF set

(Table 03627)
Values for calling QEMM v6.00+ "QEMM_GET_VHI_INFO"/"QPI_GetVHIInfo" function:
        AX = 2000h "QEMM_GET_VHI_INFO" get VirtualHDIRQ information
Return: CF clear
        BL = flags
            bit 7: VirtualHDIRQ setting respected
                  (set if Stealth active)
            bits 6-1 reserved
            bit 0: VirtualHDIRQ currently enabled
                (INT 15/AH=90h suppressed when enabled)
Note:   this function is officially documented
SeeAlso: #03628

(Table 03628)
Values for calling QEMM v6.00+ "QEMM_SET_VHI_INFO"/"QPI_SetVHIInfo" function:
        AX = 2001h set VirtualHDIRQ state
        BL bit 0 = new VirtualHDIRQ state
Return: CF clear
        BL = old VHI setting (bits 0 and 7, see #03627)
Note:   this function is officially documented
SeeAlso: #03627

(Table 03629)
Values for calling QEMM v6.00+ QPI function 20xxh:
        AX = 2002h to 20FFh
Return: CF set

(Table 03630)
Values for calling QEMM v6.00+ "QEMM_COPY_STEALTH_ROMS"/"QPI_CopyStealthRoms":
        AX = 2100h copy data from Stealthed address space
        DS:SI -> start address of hidden memory to copy
        ES:DI -> buffer for copied data
        ECX = number of bytes to copy
Return: CF clear if successful
        CF set on error (no Stealth or DS:SI < C000h:0000h or DS:SI + ECX > 1M)
Note:   this function was officially documented with the release of QEMM 7.50

(Table 03631)
Values for calling QEMM v6.00+ QPI function 21xxh:
        AX = 2101h to 21FFh
Return: CF set

(Table 03632)
Values for calling QEMM v6.03+ QPI function 2200h:
        AX = 2200h DESQview/X support -- get ???
Return: CF clear
        ES:DI -> ???

(Table 03633)
Values for calling QEMM v6.03+ QPI function 2201h:
        AX = 2201h DESQview/X support -- set ???
        ES:DI -> ??? or 0000h:0000h
Return: CF clear if successful
        CF set on error

(Table 03634)
Values for calling QEMM v6.04+ QPI function 2300h:
        AX = 2300h get ???
        BX = which ??? to get (must be 0000h for v6.04)
Return: CF clear if successful
            ES:DI -> ???
        CF set on error

(Table 03635)
Values for calling QEMM v6.04+ QPI function 2301h:
        AX = 2301h set ???
        BX = which ??? to set (must be 0000h for v6.04)
        ES:DI -> ???
Return: CF clear if successful
        CF set on error

(Table 03636)
Values for calling QEMM v6.04+ QPI function 2302h:
        AX = 2302h clear specified ???
        BX = which ??? to clear (must be 0000h for v6.04)
Return: CF clear if successful
        CF set on error

(Table 03637)
Values for calling QEMM v6.04+ QPI function 23FFh:
        AX = 23FFh clear all ???
Return: CF clear if successful
        CF set on error

(Table 03638)
Values for calling QEMM v6.04+ QPI function 23xxh:
        AX = 2303h to 23FEh
Return: CF set

(Table 03639)
Values for calling QEMM v7.01+ QPI function 24h:
        AH = 24h ST-DBL support
        AL = subfunction
            00h set ???
                EDX -> information table (EDX = segment SHL 16 + offset)
            01h ???
Return: CF clear if successful
        CF set on error

(Table 03640)
Values for calling QEMM unimplemented QPI functions:
        AH = 25h to FFh
Return: CF set

Format of QEMM protection level configuration:
Offset  Size    Description     (Table 03641)
 00h    WORD    segment of 128 breakpoint (INT 3) instructions for use in
                  DESQview protection level 3 interrupt vector checking, or
                  0000h to disable; in pl3, INTs 00-7F are pointed at these
                  breakpoints
 02h    DWORD   -> array of actual interrupt handler addresses for INT 00-7F
                  when interrupt vectors are pointed at protection level 3
                  breakpoints
 06h    DWORD   far pointer to ??? region list (see #03642)
 0Ah    DWORD   far pointer to buffer for returned ???
 0Eh    DWORD   seg:ofs of function to call on protection violation???
 12h    WORD    segment of ???
 14h    DWORD   far pointer to DWORD containing number of paragraphs of
                  ??? for segment at offset 12h
        ???

Format of protection level Region List:
Offset  Size    Description     (Table 03642)
 00h    WORD    number of PAIRS of pointers to follow
 02h 2N DWORDs  start/end seg:ofs addresses of ??? regions
Note:   QEMM converts the segmented addresses into linear addresses in place

Format of EMM Import structure:
Offset  Size    Description     (Table 03643)
 00h    DWORD   physical address of EMM import struct
 04h    BYTE    major version (v6.00 sets to 01h)
 05h    BYTE    minor version (v6.00 sets to 00h/0Bh)
SeeAlso: INT 21/AX=4402h/SF=01h

Bitfields for memory configuration flags:
Bit(s)  Description     (Table 03644)
 0      conventional memory sorted
 1      conventional memory filled
 2      ???
 3      ???
 4      expanded memory is in use
 5      ???

Format of QEMM 6.0 memory statistics:
Offset  Size    Description     (Table 03645)
 00h    BYTE    01h if Shadow RAM found, 00h otherwise
 01h    DWORD   initial conventional memory in bytes
 05h    DWORD   initial extended memory in bytes
 09h    DWORD   initial expanded memory in bytes
 0Dh    DWORD   initial "top" or "shadow" memory in bytes
 11h    DWORD   Unavailable conventional memory in bytes
 15h    DWORD   Unavailable extended memory in bytes
 19h    DWORD   Unavailable expanded memory in bytes
 1Dh    DWORD   Unavailable "top" or "shadow" memory in bytes
                Add to offset 49h for Total unavailable top/shadow.
 21h    DWORD   QEMM code size in bytes
 25h    DWORD   QEMM data size in bytes
 29h    DWORD   bytes used for TASKS=
 2Dh    DWORD   DMA buffer size
 31h    DWORD   bytes used for MAPS=
 35h    DWORD   bytes of high RAM
 39h    DWORD   bytes used by mapped ROMs
 3Dh    DWORD   bytes of conventional memory provided by QEMM
 41h    DWORD   bytes of extended memory NOT converted by QEMM (EXT=xxx)
 45h    DWORD   bytes of EMS/XMS pool memory provided by QEMM
 49h    DWORD   Unavailable "top" or "shadow" memory in bytes
                Add to offset 1Dh for Total unavailable top/shadow.
 4Dh    DWORD   conventional memory overhead in bytes
                (set to 0 by QEMM.COM prior to call)

Format of Stealth ROM info [array]:
Offset  Size    Description     (Table 03646)
 00h    WORD    starting segment of ROM
 02h    WORD    length of ROM in paragraphs

Format of QEMM EGA/VGA DAC register virtualization buffer:
Offset  Size    Description     (Table 03647)
 00h    BYTE    (temp) current color register number
 01h    BYTE    (temp) number of bytes written so far for current color reg
 02h 768 BYTEs  three bytes per color register
--------m-6740-------------------------------
INT 67 - LIM EMS - GET MANAGER STATUS
        AH = 40h
Return: AH = status (00h,80h,81h,84h) (see #03648)
Note:   this call can be used only after establishing that the EMS driver is in
          fact present
SeeAlso: AH=3Fh,AX=FFA5h,@xxxxh:xxxxh"PMM"

(Table 03648)
Values for EMS function status:
 00h    successful
 80h    internal error
 81h    hardware malfunction
 82h    busy -- retry later
 83h    invalid handle
 84h    undefined function requested by application
 85h    no more handles available
 86h    error in save or restore of mapping context
 87h    insufficient memory pages in system
 88h    insufficient memory pages available
 89h    zero pages requested
 8Ah    invalid logical page number encountered
 8Bh    invalid physical page number encountered
 8Ch    page-mapping hardware state save area is full
 8Dh    save of mapping context failed
 8Eh    restore of mapping context failed
 8Fh    undefined subfunction
 90h    undefined attribute type
 91h    feature not supported
 92h    successful, but a portion of the source region has been overwritten
 93h    length of source or destination region exceeds length of region
          allocated to either source or destination handle
 94h    conventional and expanded memory regions overlap
 95h    offset within logical page exceeds size of logical page
 96h    region length exceeds 1M
 97h    source and destination EMS regions have same handle and overlap
 98h    memory source or destination type undefined
 9Ah    specified alternate map register or DMA register set not supported
 9Bh    all alternate map register or DMA register sets currently allocated
 9Ch    alternate map register or DMA register sets not supported
 9Dh    undefined or unallocated alternate map register or DMA register set
 9Eh    dedicated DMA channels not supported
 9Fh    specified dedicated DMA channel not supported
 A0h    no such handle name
 A1h    a handle found had no name, or duplicate handle name
 A2h    attempted to wrap around 1M conventional address space
 A3h    source array corrupted
 A4h    operating system denied access
--------m-6741-------------------------------
INT 67 - LIM EMS - GET PAGE FRAME SEGMENT
        AH = 41h
Return: AH = status (see also AH=40h)
            00h function successful
                BX = segment of page frame
SeeAlso: AH=58h,AH=68h
--------m-6742-------------------------------
INT 67 - LIM EMS - GET NUMBER OF PAGES
        AH = 42h
Return: AH = status (see also AH=40h)
            00h function successful
                BX = number of unallocated pages
                DX = total number of pages
BUG:    DOS 6.0 EMM386.EXE causes a system lock-up or reboot if in AUTO mode
          when this call is made; use AH=46h to ensure that EMM386 is ON
          before making this call
SeeAlso: INT 2F/AX=2702h
--------m-6743-------------------------------
INT 67 - LIM EMS - GET HANDLE AND ALLOCATE MEMORY
        AH = 43h
        BX = number of logical pages to allocate
Return: AH = status (00h,80h,81h,84h,85h,87h,88h,89h) (see #03648)
        DX = handle if AH=00h
SeeAlso: AH=45h
--------u-674321-----------------------------
INT 67 - Q87 v4+ - INSTALLATION CHECK
        AX = 4321h
        EAX = 87654321h (entire EAX value required)
Return: EAX = 12345678h if Q87 is installed
Note:   this call requires that VCPI services be available; if they are not,
          this call will not be recognized
BUG:    v4.00-v4.03 will hang on most machines when run under bare DOS with
          no memory manager, because neither Q87 nor UNLOAD87 checks whether
          there is a valid INT 67 handler before performing an installation
          check via INT 67
SeeAlso: AX=2833h,INT 21/AX=4321h
--------m-6744-------------------------------
INT 67 - LIM EMS - MAP MEMORY
        AH = 44h
        AL = physical page number (0-3)
        BX = logical page number
            or FFFFh to unmap (QEMM)
        DX = handle
Return: AH = status (00h,80h,81h,83h,84h,8Ah,8Bh) (see #03648)
SeeAlso: AH=69h
--------m-6745-------------------------------
INT 67 - LIM EMS - RELEASE HANDLE AND MEMORY
        AH = 45h
        DX = EMM handle
Return: AH = status (00h,80h,81h,83h,84h,86h) (see #03648)
SeeAlso: AH=43h
--------m-6746-------------------------------
INT 67 - LIM EMS - GET EMM VERSION
        AH = 46h
Return: AH = status (00h,80h,81h,84h) (see #03648)
        AL = EMM version number if AH=00h
--------m-6747-------------------------------
INT 67 - LIM EMS - SAVE MAPPING CONTEXT
        AH = 47h
        DX = handle
Return: AH = status (00h,80h,81h,83h,84h,8Ch-8Eh) (see #03648)
SeeAlso: AH=48h
--------m-6748-------------------------------
INT 67 - LIM EMS - RESTORE MAPPING CONTEXT
        AH = 48h
        DX = handle
Return: AH = status (00h,80h,81h,83h,84h,8Eh) (see #03648)
SeeAlso: AH=47h
--------m-6749-------------------------------
INT 67 - LIM EMS - reserved - GET I/O PORT ADDRESSES
        AH = 49h
Note:   defined in EMS 3.0, but undocumented in EMS 3.2
--------m-674A-------------------------------
INT 67 - LIM EMS - reserved - GET TRANSLATION ARRAY
        AH = 4Ah
Note:   defined in EMS 3.0, but undocumented in EMS 3.2
--------m-674B-------------------------------
INT 67 - LIM EMS - GET NUMBER OF EMM HANDLES
        AH = 4Bh
Return: AH = status (00h,80h,81h,83h,84h) (see #03648)
        BX = number of EMM handles if AH=00h
--------m-674C-------------------------------
INT 67 - LIM EMS - GET PAGES OWNED BY HANDLE
        AH = 4Ch
        DX = EMM handle
Return: AH = status (see #02785)
        BX = number of logical pages if AH=00h
SeeAlso: AH=4Dh
--------m-674D-------------------------------
INT 67 - LIM EMS - GET PAGES FOR ALL HANDLES
        AH = 4Dh
        ES:DI -> array to receive information
Return: AH = status (00h,80h,81h,84h) (see #03648)
        ---if AH=00h---
        BX = number of active EMM handles
        array filled with 2-word entries, consisting of a handle and the
          number of pages allocated to that handle
SeeAlso: AH=4Ch
--------m-674E-------------------------------
INT 67 - LIM EMS - GET OR SET PAGE MAP
        AH = 4Eh
        AL = subfunction
            00h get mapping registers
            01h set mapping registers
            02h get and set mapping registers at once
            03h get size of page-mapping array
        DS:SI -> array holding information (AL=01h/02h)
        ES:DI -> array to receive information (AL=00h/02h)
Return: AH = status (00h,80h,81h,84h,8Fh,A3h) (see also AH=40h)
            00h successful
                AL = bytes in page-mapping array (AL=03h only)
                array pointed to by ES:DI receives mapping info (AL=00h/02h)
Notes:  this function was designed to be used by multitasking operating systems
          and should not ordinarily be used by appplication software.
        MD386 returns the size of the page-mapping array in AX instead of AL
SeeAlso: AH=4Fh
--------m-674F-------------------------------
INT 67 - LIM EMS 4.0 - GET/SET PARTIAL PAGE MAP
        AH = 4Fh
        AL = subfunction
            00h get partial page map
               DS:SI -> structure containing list of segments whose mapping
                        contexts are to be saved
               ES:DI -> array to receive page map
            01h set partial page map
               DS:SI -> structure containing saved partial page map
            02h get size of partial page map
               BX = number of mappable segments in the partial map to be saved
Return: AH = status (00h,80h,81h,84h,8Bh,8Fh,A3h) (see also AH=40h)
            8Bh one of the specified segments is not mappable
            A3h contents of partial page map corrupted or count of mappable
                segments exceeds total number of mappable segments in system
        AL = size of partial page map for subfunction 02h
SeeAlso: AH=4Eh
--------m-6750-------------------------------
INT 67 - LIM EMS 4.0 - MAP/UNMAP MULTIPLE HANDLE PAGES
        AH = 50h
        AL = subfunction
            00h use physical page numbers
            01h use segment addresses
        DX = handle
        CX = number of entries in array
        DS:SI -> mapping array (see #03649)
Return: AH = status (00h,80h,81h,83h,84h,8Ah,8Bh,8Fh) (see #03648)
SeeAlso: AH=40h

Format of EMS mapping array entry:
Offset  Size    Description     (Table 03649)
 00h    WORD    logical page number or FFFFh to unmap physical page
 02h    WORD    physical page number or segment address
--------m-6751-------------------------------
INT 67 - LIM EMS 4.0 - REALLOCATE PAGES
        AH = 51h
        DX = handle
        BX = number of pages to be allocated to handle
Return: AH = status (00h,80h,81h,83h,84h,87h,88h) (see #03650)
        BX = actual number of pages allocated to handle

(Table 03650)
Values for EMS function status:
 00h    successful
 80h    internal error
 81h    hardware malfunction
 83h    invalid handle
 84h    undefined function requested
 87h    more pages requested than present in system
 88h    more pages requested than currently available
 8Ah    invalid logical page number encountered
 8Bh    invalid physical page number encountered
 8Fh    undefined subfunction
 90h    undefined attribute type
 91h    feature not supported
 A0h    no such handle name
 A1h    duplicate handle name
--------m-6752-------------------------------
INT 67 - LIM EMS 4.0 - GET/SET HANDLE ATTRIBUTES
        AH = 52h
        AL = subfunction
            00h get handle attributes
                Return: AL = attribute
                            00h handle is volatile
                            01h handle is nonvolatile
            01h set handle attributes
                BL = new attribute
                   00h handle is volatile
                   01h handle is nonvolatile
            02h get attribute capability
                Return: AL = attribute capability
                            00h only volatile handles supported
                            01h both volatile and non-volatile supported
        DX = handle
Return: AH = status (00h,80h,81h,83h,84h,8Fh-91h) (see #03648)
SeeAlso: AH=53h
--------m-6753-------------------------------
INT 67 - LIM EMS 4.0 - GET/SET HANDLE NAME
        AH = 53h
        AL = subfunction
            00h get handle name
               ES:DI -> 8-byte buffer for handle name
            01h set handle name
               DS:SI -> 8-byte handle name
        DX = handle
Return: AH = status (00h,80h,81h,83h,84h,8Fh,A1h) (see #03648)
SeeAlso: AH=52h
--------m-6754-------------------------------
INT 67 - LIM EMS 4.0 - GET HANDLE DIRECTORY
        AH = 54h
        AL = subfunction
            00h get handle directory
               ES:DI -> buffer for handle directory (see #03651)
            01h search for named handle
               DS:SI -> 8-byte name
            02h get total number of handles
Return: AL = number of entries in handle directory (subfunction 00h)
        DX = value of named handle (subfunction 01h)
        BX = total number of handles (subfunction 02h)
        AH = status (00h,80h,81h,84h,8Fh,A0h,A1h) (see also #03650)
            A1h a handle found had no name

Format of EMS handle directory entry:
Offset  Size    Description     (Table 03651)
 00h    WORD    handle
 02h  8 BYTEs   handle's name
--------m-6755-------------------------------
INT 67 - LIM EMS 4.0 - ALTER PAGE MAP AND JUMP
        AH = 55h
        AL = subfunction
            00h physical page numbers provided by caller
            01h segment addresses provided by caller
        DX = handle
        DS:SI -> structure containing map and jump address
Return: (at target address unless error)
        AH = status (00h,80h,81h,83h,84h,8Ah,8Bh,8Fh) (see #03648)
SeeAlso: AH=56h
--------m-6756-------------------------------
INT 67 - LIM EMS 4.0 - ALTER PAGE MAP AND CALL
        AH = 56h
        AL = subfunction
            00h physical page numbers provided by caller
                DX = handle
                DS:SI -> structure containing page map and call address
            01h segment addresses provided by caller
                DX = handle
                DS:SI -> structure containing page map and call address
            02h get page map stack space required
                Return: BX = stack space required
Return: (if successful, the target address is called.  Use a RETF to return
         and restore mapping context)
        AH = status (00h,80h,81h,83h,84h,8Ah,8Bh,8Fh) (see #03648)
SeeAlso: AH=55h
--------m-6756FF-----------------------------
INT 67 - RM386 v6.00 - ???
        AX = 56FFh
        DS:SI -> ???
        ???
Return: ???
--------m-6757-------------------------------
INT 67 - LIM EMS 4.0 - MOVE/EXCHANGE MEMORY REGION
        AH = 57h
        AL = subfunction
            00h move memory region
            01h exchange memory region
        DS:SI -> structure describing source and destination (see #03653)
Return: AH = status (see #03652)
Note:   source and destination may overlap for a move, in which case the copy
          direction is chosen such that the destination receives an intact copy
          of the source region

(Table 03652)
Values for EMS function status:
 00h    successful
 80h    internal error
 81h    hardware failure
 83h    invalid handle
 84h    undefined function requested
 8Ah    invalid logical page number encountered
 8Fh    undefined subfunction
 92h    successful, but a portion of the source region has been overwritten
 93h    length of source or destination region exceeds length of region
          allocated to either source or destination handle
 94h    conventional and expanded memory regions overlap
 95h    offset within logical page exceeds size of logical page
 96h    region length exceeds 1M
 97h    source and destination EMS regions have same handle and overlap
 98h    memory source or destination type undefined
 A2h    attempted to wrap around 1M conventional address space

Format of EMS copy data:
Offset  Size    Description     (Table 03653)
 00h    DWORD   region length in bytes
 04h    BYTE    source memory type
                00h conventional
                01h expanded
 05h    WORD    source handle (0000h if conventional memory)
 07h    WORD    source initial offset (within page if EMS, segment if convent)
 09h    WORD    source initial segment (conv mem) or logical page (EMS)
 0Bh    BYTE    destination memory type
                00h conventional
                01h expanded
 0Ch    WORD    destination handle
 0Eh    WORD    destination initial offset
 10h    WORD    destination initial segment or page
--------m-6758-------------------------------
INT 67 - LIM EMS 4.0 - GET MAPPABLE PHYSICAL ADDRESS ARRAY
        AH = 58h
        AL = subfunction
            00h get mappable physical address array
                ES:DI -> buffer to be filled with array (see #03654)
            01h get number of entries in m.p.a. array
Return: CX = number of entries in array
        AH = status (00h,80h,81h,84h,8Fh) (see #03652)
Note:   the returned array for subfunction 00h is filled in physical segment
          address order

Format of EMS mappable physical address entry:
Offset  Size    Description     (Table 03654)
 00h    WORD    physical page segment
 02h    WORD    physical page number
--------m-675857-----------------------------
INT 67 U - NETROOM??? - ???
        AX = 5857h
        BX = function??? (0057h,0059h,0159h seen)
        ???
Return: ???
Note:   BX=0059h appears to be analogous to AX=5800h and BX=0159h appears to
          be analogous to AX=5801h; BX=0057h appears to indicate whether
          AX=580xh or AX=5857h/BX=0x59h should be used
SeeAlso: AX=5BF0h
--------m-6759-------------------------------
INT 67 - LIM EMS 4.0 - GET EXPANDED MEMORY HARDWARE INFORMATION
        AH = 59h
        AL = subfunction
            00h get hardware configuration array
                ES:DI -> buffer to be filled with array (see #03655)
            01h get unallocated raw page count
                Return: BX = unallocated raw pages
                        DX = total raw pages
Return: AH = status (see also AH=58h"EMS 4.0")
            A4h access denied by operating system
Note:   subfunction 00h is for use by operating systems only, and can be
          enabled or disabled at any time by the operating system

Format of EMS hardware configuration array:
Offset  Size    Description     (Table 03655)
 00h    WORD    size of raw EMM pages in paragraphs
 02h    WORD    number of alternate register sets
 04h    WORD    size of mapping-context save area in bytes
 06h    WORD    number of register sets assignable to DMA
 08h    WORD    DMA operation type
                0000h DMA with alternate register sets
                0001h only one DMA register set
--------m-675A-------------------------------
INT 67 - LIM EMS 4.0 - ALLOCATE STANDARD/RAW PAGES
        AH = 5Ah
        AL = subfunction
            00h allocate standard pages
            01h allocate raw pages
        BX = number of pages to allocate
Return: DX = handle
        AH = status (00h,80h,81h,84h,85h,87h,88h,8Fh) (see #03648)
--------m-675B-------------------------------
INT 67 - LIM EMS 4.0 - ALTERNATE MAP REGISTER SET
        AH = 5Bh
        AL = subfunction
            00h get alternate map register set
                Return: BL = current active alternate map register set number
                        ES:DI -> map register context save area if BL=00h
            01h set alternate map register set
                BL = new alternate map register set number
                ES:DI -> map register context save area if BL=0
            02h get alternate map save array size
                Return: DX = array size in bytes
            03h allocate alternate map register set
                Return: BL = number of map register set; 00h = not supported
            04h deallocate alternate map register set
                BL = number of alternate map register set
Return: AH = status (00h,80h,81h,84h,8Fh,9Ah-9Dh,A3h,A4h) (see #03656)
Note:   this function is for use by operating systems only, and can be
          enabled or disabled at any time by the operating system

(Table 03656)
Values for EMS function status:
 00h    successful
 80h    internal error
 81h    hardware malfunction
 84h    undefined function requested
 8Fh    undefined subfunction
 9Ah    specified alternate map register or DMA register set not supported
 9Bh    all alternate map register or DMA register sets currently allocated
 9Ch    alternate map register or DMA register sets not supported
 9Dh    undefined or unallocated alternate map register/DMA register set
 9Eh    dedicated DMA channels not supported
 9Fh    specified dedicated DMA channel not supported
 A3h    source array corrupted
 A4h    operating system denied access
--------m-675B-------------------------------
INT 67 - LIM EMS 4.0 - ALTERNATE MAP REGISTER SET - DMA REGISTERS
        AH = 5Bh
        AL = subfunction
            05h allocate DMA register set
                Return: BL = DMA register set number, 00h if not supported
            06h enable DMA on alternate map register set
               BL = DMA register set number
               DL = DMA channel number
            07h disable DMA on alternate map register set
               BL = DMA register set number
            08h deallocate DMA register set
               BL = DMA register set number
Return: AH = status (00h,80h,81h,84h,8Fh,9Ah-9Fh,A3h,A4h) (see #03656)
Note:   this function is for use by operating systems only, and can be
          enabled or disabled at any time by the operating system
--------m-675BE0-----------------------------
INT 67 - MICEMM v4D, RM386 - GET LINEAR ADDRESS OF MEMORY
        AX = 5BE0h
        ES:BX -> memory for which to get linear address
Return: AH = 00h
        CX:DX = linear address of physical memory corresponding to ES:BX
Program: RAM-MAN/386 is the memory manager included with Helix's Netroom;
          MICEMM is a memory manager for some Micronics motherboards
Note:   this has been superceded by AX=DE06h, which should be used instead
SeeAlso: AX=5BF0h,AX=5BF1h,AX=DE06h
--------m-675BE1-----------------------------
INT 67 - RM386 v6.00+ - GET MEMORY MANAGER SIZE
        AX = 5BE1h
Return: AH = 00h
        CX = code and data size in bytes
        DX:BX = physical address of RM386 code
        DI:SI = total size of RM386 area including handle tables
        BP = number of additional pages (high DOS, etc.)
SeeAlso: AX=5BE0h,AX=5BE2h
--------m-675BE2-----------------------------
INT 67 - RM386 v6.00+ - GET INTERRUPT VECTORS
        AX = 5BE2h
Return: DS:SI -> V86-mode table (see #03657)
        ES:BX -> ??? (undoc, middle of device driver interrupt routine!)
SeeAlso: AX=5BE0h,AX=5BE1h

Format of RM386 V86-mode table:
Offset  Size    Description     (Table 03657)
 00h    DWORD   original INT 13 vector
 04h    DWORD   original INT 15 vector
 08h    DWORD   original INT 19 vector
 0Ch    DWORD   original INT 21 vector
 10h    DWORD   original INT 4B vector
 14h    DWORD   original INT 67 vector
--------m-675BF0-----------------------------
INT 67 - MICEMM v4D, RM386 - INSTALLATION CHECK
        AX = 5BF0h
Return: AH = 00h if MICEMM or RM386 present
            BX = code segment of driver
Program: MICEMM is the Micronics Expanded Memory Manager; RM386 is the memory
          manager included in Helix Software's Netroom
SeeAlso: AH=3Fh,AX=5BE0h,AX=5BF1h
--------m-675BF1-----------------------------
INT 67 - MICEMM v4D, RM386 - GET ADDRESS MAP
        AX = 5BF1h
        ES:BX -> 256-byte (MICEMM) or 512-byte (RM386) buffer for memory types
Return: AH = 00h
        ES:BX buffer filled (see #03658)
Note:   each byte in the buffer specifies the type of a 4K page of memory
SeeAlso: AX=5BE0h,AX=5BF0h

(Table 03658)
Values for MICEMM/RM386 memory type:
 00h    unused (MICEMM), RAM/available (RM386)
 02h    DOS extension (XMS UMB)
 04h    shadowed ROM
 08h    mappable EMS
 10h    page frame
 20h    ROM
 40h    reserved (video memory, etc)
 80h    RAM (MICEMM), Windows UMB (RM386)
--------m-675BF2-----------------------------
INT 67 - RM386 - GET RM386 INTERNAL DATA
        AX = 5BF2h
        CX = size of buffer
        DS:SI -> buffer for internal data
        (documentation says ES:BX -> buffer, SI = offset within RM386)
Return: buffer filled
Note:   the data returned by this function is release-specific
SeeAlso: AX=5BF0h
--------m-675BF3-----------------------------
INT 67 - RM386 - RETURN TO REAL MODE
        AX = 5BF3h
Return: nothing
Note:   use AX=5DE0h instead of this functin
SeeAlso: AX=5BF0h,AX=5DE0h
--------m-675BF4-----------------------------
INT 67 - RM386 v6.00 - GET RM386 GLOBAL FLAGS
        AX = 5BF4h
Return: AH = 00h
        BX = global flags 1 (see #03659)
        CX = global flags 2 (see #03660)
        DX = global flags 3 (see #03661)
        SI = global flags 4 (see #03662)
SeeAlso: AX=5BF0h

Bitfields for RM386 global flags 1:
Bit(s)  Description     (Table 03659)
 0-3    reserved
 4      V86 mode
 5      reserved
 6      80386 or higher CPU
 7,8    reserved
 9      A20 enabled at startup
 10     "HIGH_IO"
 11     ROM
 12     large frame
 13,14  reserved
 15     PS/2-style A20 control

Bitfields for RM386 global flags 2:
Bit(s)  Description     (Table 03660)
 0      HMA in use
 1      XMS present
 2      using XMS driver memory
 3      HIGH (NEAT only)
 4-7    reserved
 8      NOBKTRAP
 9      NORESET
 10     ALTMAP
 11     NOFRAME
 12-15  reserved

Bitfields for RM386 global flags 3:
Bit(s)  Description     (Table 03661)
 0      NOTEST
 1      NOEBDA
 2      Windows3 support
 3      system board mouse
 4      DISKBUF
 5      EBDALOW
 6      A20 global enable flag
 7      A20 flag
 8      EBDA moved to stub
 9      VXD file was found
 10     reserved
 11     NOBOOTMAP
 12     AUTO
 13     PS/2 machine
 14     Compaq ROM merge active
 15     NOHMA set

Bitfields for RM386 global flags 4:
Bit(s)  Description     (Table 03662)
 0      "NOV8259" don't virtualize interrupt controller
 1      NOSCSI
 2      NOSCAN
 3      NOTR
 4      ALTBOOT
 5      NOCOMPQ
 6      KB2TRAP
 7      DESHADOW
 8      Video 7 VGA detected
 9      reserved
 10     NOVGA
 11     NOPS2
 12     DEBUG
 13     NOVKB
 14,15  reserved
--------m-675BF5-----------------------------
INT 67 - RM386 v6.00 - GET RM386 EMS HANDLE COUNT
        AX = 5BF5h
Return: AH = status
            00h successful
                BX = current number of allocated EMS handles
            84h function not available
SeeAlso: AX=5BF0h
--------m-675C-------------------------------
INT 67 - LIM EMS 4.0 - PREPARE EXPANDED MEMORY HARDWARE FOR WARM BOOT
        AH = 5Ch
Return: AH = status (see #03663)
Note:   when MS-DOS v6.xx EMM386 is loaded and the keyboard driver supports
          INT 15/AH=4Fh (keyboard intercept) calls, the system may hang
          instead of booting if this function is called just prior to a jump
          to F000h:FFF0h

(Table 03663)
Values for EMS function status:
 00h    successful
 80h    internal error
 81h    hardware malfunction
 84h    undefined function requested
--------m-675D-------------------------------
INT 67 - LIM EMS 4.0 - ENABLE/DISABLE OS FUNCTION SET FUNCTIONS
        AH = 5Dh
        AL = subfunction
            00h enable OS Function Set
            01h disable OS Function Set
            02h return access key (resets memory manager, returns access key at
                next invocation)
        BX,CX = access key returned by first invocation
Return: BX,CX = access key, returned only on first invocation of function
        AH = status (see also AH=5Ch)
            8Fh undefined subfunction
            A4h operating system denied access
--------m-675D03-----------------------------
INT 67 u - Nanosoft MD386 - INTERNAL INITIALIZATION
        AX = 5D03h
        ???
Return: ???
Program: MD386 is a subset EMS memory manager by Nanosoft specifically
          designed for use with the MultiDOS Plus multitasker
SeeAlso: AX=5D04h,AX=5E00h
--------m-675D04-----------------------------
INT 67 - Nanosoft MD386 - GET ALTERNATE MAP STRUCTURE
        AX = 5D04h
        BX = alternate register set number
        ES:DI -> 1024-byte buffer for map structure
Return: AH = status (see #03648)
        buffer filled if AH=00h
Note:   used for debugging purposes
SeeAlso: AX=5D05h
--------m-675D05-----------------------------
INT 67 - Nanosoft MD386 - GET INTERNAL HANDLE TABLE
        AX = 5D05h
        BX = handle number
        ES:DI -> 1024-byte buffer for handle table
Return: AH = status (see #03648)
        buffer filled if AH=00h
Note:   used for debugging purposes
SeeAlso: AX=5D04h
--------m-675DE0-----------------------------
INT 67 - RM386 - DISABLE RM386
        AX = 5DE0h
Note:   RM386 traps this function on the initial transition to protected
          mode caused by the INT instruction, which means it can not be
          overridden simply by hooking the interrupt
SeeAlso: AX=5DE1h
--------m-675DE1-----------------------------
INT 67 - RM386 - ENABLE RM386
        AX = 5DE1h
Note:   RM386 traps this function on the initial transition to protected
          mode caused by the INT instruction, which means it can not be
          overridden simply by hooking the interrupt
SeeAlso: AX=5DE0h
--------m-675DE2-----------------------------
INT 67 - RM386 - GET PAGE TABLE
        AX = 5DE2h
        ES:DI -> 1088-byte buffer for page table
Return: ES:DI buffer filled
Note:   RM386 traps this function on the initial transition to protected
          mode caused by the INT instruction, which means it can not be
          overridden simply by hooking the interrupt
SeeAlso: AX=5DE3h
--------m-675DE3-----------------------------
INT 67 - RM386 - SET PAGE TABLE
        AX = 5DE3h
        ES:DI -> 1088-byte buffer containing page table
Notes:  only the access bits of the page table are used, the remainder is
          ignored
        RM386 traps this function on the initial transition to protected
          mode caused by the INT instruction, which means it can not be
          overridden simply by hooking the interrupt
SeeAlso: AX=5DE2h
--------m-675DE4-----------------------------
INT 67 - RM386 - SET WRITE-PROTECTION FOR PAGE IN FIRST MEGABYTE
        AX = 5DE4h
        BL = page number
        BH = access (00h read-only, 01h read-write)
Note:   RM386 traps this function on the initial transition to protected
          mode caused by the INT instruction, which means it can not be
          overridden simply by hooking the interrupt
--------m-675DE5-----------------------------
INT 67 - RM386 - MAP PHYSICAL PAGE TO PHYSICAL SEGMENT
        AX = 5DE5h
        EBX = physical page number
        DX = page number in first megabyte to be remapped (linear-addr SHR 12)
Return: AH = status
            00h successful
            8Bh invalid destination page (not in first megabyte)
Note:   RM386 traps this function on the initial transition to protected
          mode caused by the INT instruction, which means it can not be
          overridden simply by hooking the interrupt
SeeAlso: AX=5DE6h
--------m-675DE6-----------------------------
INT 67 - RM386 - MAP LOGICAL 4K PAGE TO PHYSICAL SEGMENT
        AX = 5DE6h
        BX = logical page number in 4K pages from beginning of memory for EMS
              handle
        CX = segment in first megabyte to be remapped
        DX = previously-allocated EMS handle
Return: AH = status
            00h successful
            83h invalid handle
            8Ah invalid logical page (out of handle's range)
            8Bh invalid destination page (not in first megabyte)
Note:   RM386 traps this function on the initial transition to protected
          mode caused by the INT instruction, which means it can not be
          overridden simply by hooking the interrupt
SeeAlso: AX=5DE5h
--------m-675DE7-----------------------------
INT 67 - RM386 - SET PAGE TABLE BITS FOR RANGE OF PAGES
        AX = 5DE7h
        BL = page table bits to be set (bits 2-0 = U/S, R/W, P)
        CX = number of pages to set
        DX = first page number to set (in first megabyte)
Return: AH = status
            00h successful
            8Bh invalid destination page (not in first megabyte)
            A5h invalid page bits
            A6h invalid page count (overflows first megabyte)
Note:   RM386 traps this function on the initial transition to protected
          mode caused by the INT instruction, which means it can not be
          overridden simply by hooking the interrupt
--------m-675DE8-----------------------------
INT 67 - RM386 - GET PARTIAL PAGE TABLE
        AX = 5DE8h
        BX = starting page number in first megabyte+HMA (0000h-010Fh)
        CX = number of page table entries to get
        ES:DI -> buffer for DWORD page table entries
Return: AH = status (00h successful, 8Bh invalid page)
Note:   RM386 traps this function on the initial transition to protected
          mode caused by the INT instruction, which means it can not be
          overridden simply by hooking the interrupt
SeeAlso: AX=5DE9h
--------m-675DE9-----------------------------
INT 67 - RM386 - SET PARTIAL PAGE TABLE
        AX = 5DE9h
        BX = starting page number in first megabyte+HMA (0000h-010Fh)
        CX = number of page table entries to get
        DS:SI -> buffer of DWORD page table entries
Return: AH = status (00h successful, 8Bh invalid destination page)
Note:   RM386 traps this function on the initial transition to protected
          mode caused by the INT instruction, which means it can not be
          overridden simply by hooking the interrupt
SeeAlso: AX=5DE8h
--------m-675DEA-----------------------------
INT 67 - RM386 - V86-MODE I/O PORT TRAPPING CONTROL
        AX = 5DEAh
        BX = function
            00h globally disable V86-mode trapping
            01h globally enable V86-mode trapping
                CL = interrupt to use for trapping
            02h get I/O trapping state
Return: AH = status
            00h successful
                BX = current trapping state (function 02h)
                    0000h disabled, 0001h enabled
                CX = interrupt used as trap interrupt (functions 00h and 02h)
Notes:  RM386 traps this function on the initial transition to protected
          mode caused by the INT instruction, which means it can not be
          overridden simply by hooking the interrupt
        when I/O trapping is enabled and I/O port access occurs, RM386
          simulates an INT instruction for the specified interrupt; the
          interrupt handler is responsible for decoding the trapped instruction
          and performing the appropriate action.  INT 2C/AX=002Dh provides a
          similar but more-easily used interface.
SeeAlso: AX=5DEBh,AH=EFh"RM386",INT 2C/AX=002Dh
--------m-675DEB-----------------------------
INT 67 - RM386 - V86-MODE I/O TRAPPING PORT CONTROL
        AX = 5DEBh
        BX = function
            00h disable V86-mode trapping for specified port
            01h enable V86-mode trapping for specified port
            02h get V86-mode trapping state for specified port
        DX = port for which to enable/disable/query trapping
Return: AH = status
            00h successful
                BX = current trapping state (00h off, 01h on) (function 02)
            A7h invalid port ID
            A8h reserved port--cannot trap/untrap (DMA/INT/KBD controllers)
Notes:  RM386 traps this function on the initial transition to protected
          mode caused by the INT instruction, which means it can not be
          overridden simply by hooking the interrupt
SeeAlso: AX=5DEAh
--------m-675DFD-----------------------------
INT 67 U - RM386 v6.00 - ???
        AX = 5DFDh
        ???
Return: ???
Note:   RM386 traps this function on the initial transition to protected
          mode caused by the INT instruction, which means it can not be
          overridden simply by hooking the interrupt
SeeAlso: AX=5DFEh
--------m-675DFE-----------------------------
INT 67 U - RM386 v6.00 - ???
        AX = 5DFEh
        ???
Return: ???
Note:   RM386 traps this function on the initial transition to protected
          mode caused by the INT instruction, which means it can not be
          overridden simply by hooking the interrupt
SeeAlso: AX=5DFDh
--------m-675DFF-----------------------------
INT 67 U - RM386 v6.00 - ???
        AX = 5DFFh
        ???
Return: ???
Note:   RM386 traps this function on the initial transition to protected
          mode caused by the INT instruction, which means it can not be
          overridden simply by hooking the interrupt
SeeAlso: AX=5DFDh,AX=5DFEh
--------m-675E00-----------------------------
INT 67 - Nanosoft MD386 - SET HARDWARE BREAKPOINT
        AX = 5E00h
        DH = breakpoint number (0-3)
        DL = breakpoint attributes (used to set DR7)
        CX:BX = linear address of breakpoint
SeeAlso: AX=5D03h,AX=5E01h
--------m-675E01-----------------------------
INT 67 - Nanosoft MD386 - GET HARDWARE DEBUG REGISTER
        AX = 5E01h
        BL = register number (0-3,7)
Return: CX:BX = value of specified DRx register
SeeAlso: AX=5E00h
--------m-675E02-----------------------------
INT 67 - Nanosoft MD386 - SET DEBUG EXCEPTION HANDLER
        AX = 5E02h
        CX:BX -> exception handler
Note:   the specified exception handler is called with a simulated interrupt
          whenever a debug exception occurs which was caused by a hardware
          breakpoint set with the debug registers
SeeAlso: AX=5E04h,AX=5E05h
--------m-675E03-----------------------------
INT 67 - Nanosoft MD386 - ENABLE/DISABLE MEMORY WRITE PROTECTION
        AX = 5E03h
        BL = register map set number
        BH = new state (00h read-only, else read-write)
        CX = linear page number (linear address SHR 12)
Note:   setting write protection in map set 0 will cause the setting to become
          the default for newly-allocated map sets
--------m-675E04-----------------------------
INT 67 - Nanosoft MD386 - GET DEBUG EXCEPTION
        AX = 5E04h
Return: BL = debug exception (low byte of DR6 register)
SeeAlso: AX=5E02h,AX=5E05h
--------m-675E05-----------------------------
INT 67 - Nanosoft MD386 - IGNORE NEXT DEBUG EXCEPTION
        AX = 5E05h
Note:   may be required when using AX=5E02h for handling instruction
          breakpoints
SeeAlso: AX=5E02h,AX=5E04h
--------m-6760-------------------------------
INT 67 - EEMS - GET PHYSICAL WINDOW ARRAY
        AH = 60h
        ES:DI -> buffer
Return: AH = status (see also AH=40h)
        AL = number of entries
        buffer at ES:DI filled
--------m-6761-------------------------------
INT 67 - EEMS - GENERIC ACCELERATOR CARD SUPPORT
        AH = 61h
        ???
Return: ???
Note:   can be used by accelerator card manufacturer to flush RAM cache,
          ensuring that the cache accurately reflects what the processor would
          see without the cache.
--------m-676100-----------------------------
INT 67 - EEMS - STB GENERIC ACCELERATOR CARD SUPPORT - INSTALLATION CHECK???
        AX = 6100h
Return: AH = status (00h if installed???)
Note:   STB's RAPIDMAP.SYS EMS driver calls this function and AX=6101h if
          the signature "GACXXX" is found at offset 0Ah in the INT 67 handler's
          segment (i.e. a device driver named GACXXX?? has hooked INT 67)
SeeAlso: AX=6101h,INT 02/SI=0714h
--------m-676101-----------------------------
INT 67 - EEMS - STB GENERIC ACCELERATOR CARD SUPPORT - GET ??? ENTRY POINT
        AX = 6101h
Return: AH = status
        ---if AH=00h---
        ES:BX -> ??? entry point
SeeAlso: AX=6100h
--------m-6768-------------------------------
INT 67 - EEMS - GET ADDRESSES OF ALL PAGE FRAMES IN SYSTEM
        AH = 68h
        ES:DI -> buffer
Return: AH = status (see also AH=40h)
        AL = number of entries
        buffer at ES:DI filled
Note:   equivalent to LIM 4.0 function 58h
--------m-6769-------------------------------
INT 67 - EEMS - MAP PAGE INTO FRAME
        AH = 69h
        AL = frame number
        BX = page number
        DX = handle
Return: AH = status (see also AH=40h)
Note:   similar to EMS function 44h
SeeAlso: AH=44h,AH=50h,AH=6Ah
--------m-676A-------------------------------
INT 67 - EEMS - PAGE MAPPING
        AH = 6Ah
        AL = subfunction
            00h save partial page map
                CH = first page frame
                CL = number of frames
                ES:DI -> buffer which is to be filled
            01h restore partial page map
                CH = first page frame
                CL = number of frames
                DI:SI -> previously saved page map
            02h save and restore partial page map
                CH = first page frame
                CL = number of frames
                ES:DI = buffer for current page map
                DI:SI = new page map
            03h get size of save array
                CH = first page frame
                CL = number of frames
                Return: AL = size of array in bytes
            04h switch to standard map register setting
            05h switch to alternate map register setting
            06h deallocate pages mapped to frames in conventional memory
                CH = first page frame
                CL = number of frames
Return: AH = status (see #03648)
Note:   similar to EMS function 4Eh, except that a subrange of pages can be
          specified
SeeAlso: AH=69h
--------m-676B-------------------------------
INT 67 - DESQview 2.42-2.53 - BUG
        AH = 6Bh
Note:   the EMM.DVR portion of DESQview branches to a random location on this
          function due to a fencepost error
--------m-67DD-------------------------------
INT 67 - Quadtel QMAPS - API
        AH = DDh
        AL = function
        ???
Return: ???
Notes:  details are not yet available
        Hewlett-Packard's HPMM.SYS is a licensed version of QMAPS, and thus
          supports this API
SeeAlso: AH=3Fh,AX=FFA5h
--------E-67DE00-----------------------------
INT 67 - Virtual Control Program Interface - INSTALLATION CHECK
        AX = DE00h
Return: AH = status
            00h VCPI is present
                BH = major version number
                BL = minor version number
            nonzero  VCPI not present
BUG:    MS Windows 3.00 is reported to "object violently" to this call.
SeeAlso: INT 2F/AX=1687h
--------E-67DE01-----------------------------
INT 67 - Virtual Control Program Interface - GET PROTECTED MODE INTERFACE
        AX = DE01h
        ES:DI -> 4K page table buffer
        DS:SI -> three descriptor table entries in GDT
                first becomes code segment descriptor, other two for use by
                  main control program
Return: AH = 00h successful
            DI -> first unused page table entry in buffer
            EBX -> protected mode entry point in code segment (see #03664)
        AH = nonzero  failed
Note:   protected mode entry point may be called with AX=DE00h-DE05h and
          AX=DE0Ch (in each case, all other registers as appropriate for
          the function)
SeeAlso: INT 2F/AX=1687h,INT 67/AH=3Fh

(Table 03664)
Call QEMM v6.03 protected mode entry point additionally with:
        AX = DF00h ???
                ???
                Return: ???
        AX = DF01h ???
                ???
                Return: ???
--------E-67DE02-----------------------------
INT 67 - Virtual Control Program Interface - GET MAX PHYSICAL MEMORY ADDRESS
        AX = DE02h
Return: AH = 00h  successful
            EDX = physical address of highest 4K memory page
        AH nonzero: failed
SeeAlso: AH=3Fh
--------E-67DE03-----------------------------
INT 67 - Virtual Control Program Interface - GET NUMBER OF FREE 4K PAGES
        AX = DE03h
Return: AH = 00h  successful
            EDX = number of free 4K pages
        AH nonzero: failed
Notes:  returns total number of pages available to ALL tasks in system
        also available in protected mode by calling the protected-mode VCPI
          entry point (see AX=DE01h,#03664)
SeeAlso: AX=DE04h
--------E-67DE04-----------------------------
INT 67 - Virtual Control Program Interface - ALLOCATE A 4K PAGE
        AX = DE04h
Return: AH = 00h successful
            EDX = physical address of allocated page
        AH nonzero: failed
Notes:  the client program is responsible for freeing all memory allocated
          with this call before terminating
        also available in protected mode by calling the protected-mode VCPI
          entry point (see AX=DE01h,#03664)
SeeAlso: AH=3Fh,AX=DE03h,AX=DE05h
--------E-67DE05-----------------------------
INT 67 - Virtual Control Program Interface - FREE 4K PAGE
        AX = DE05h
        EDX = physical address of 4K page
Return: AH = status
            00h successful
            nonzero failed
Note:   also available in protected mode by calling the protected-mode VCPI
          entry point (see AX=DE01h,#03664)
SeeAlso: AH=3Fh,AX=DE04h
--------E-67DE06-----------------------------
INT 67 - Virtual Control Program Interface - GET PHYS ADDR OF PAGE IN FIRST MB
        AX = DE06h
        CX = page number (linear address shifted right 12 bits)
Return: AH = status
            00h successful
                EDX = physical address of page
            nonzero invalid page number (AH = 8Bh recommended)
SeeAlso: AX=5BE0h
--------E-67DE07-----------------------------
INT 67 - Virtual Control Program Interface - READ CR0
        AX = DE07h
Return: AH = 00h
        EBX = value of Control Register 0
SeeAlso: AH=3Fh,AX=DE07h
--------E-67DE08-----------------------------
INT 67 - Virtual Control Program Interface - READ DEBUG REGISTERS
        AX = DE08h
        ES:DI -> array of 8 DWORDs
Return: AH = 00h
        buffer filled with DR0 first, DR7 last, DR4 and DR5 unused
SeeAlso: AH=3Fh,AX=DE09h
--------E-67DE09-----------------------------
INT 67 - Virtual Control Program Interface - SET DEBUG REGISTERS
        AX = DE09h
        ES:DI -> array of 8 DWORDs holding new values of debug registers
Return: AH = 00h
Note:   values for DR4 and DR5 ignored
SeeAlso: AH=3Fh,AX=DE08h
--------E-67DE0A-----------------------------
INT 67 - Virtual Control Program Interface - GET 8259 INTERRUPT VECTOR MAPPINGS
        AX = DE0Ah
Return: AH = 00h successful
            BX = first vector used by master 8259 (IRQ0)
            CX = first vector used by slave 8259 (IRQ8)
        AH nonzero: failed
Note:   CX is undefined in systems without a slave 8259
SeeAlso: AX=DE0Bh,INT 21/AX=250Ch,INT 31/AX=0400h
--------E-67DE0B-----------------------------
INT 67 - Virtual Control Program Interface - SET 8259 INTERRUPT VECTOR MAPPINGS
        AX = DE0Bh
        BX = first vector used by master 8259
        CX = first vector used by slave 8259
        interrupts disabled
Return: AH = 00h successful
        AH nonzero: failed
Notes:  This call merely informs the server that the client has changed the
          interrupt mappings.  The client may not change the mappings if they
          have already been changed by the server or another client, and is
          responsible for restoring the original mappings before terminating.
SeeAlso: AX=DE0Ah,INT 2C/AX=002Ah
--------E-67DE0C-----------------------------
INT 67 - Virtual Control Program Interface - SWITCH TO PROTECTED MODE
        AX = DE0Ch
        ESI = linear address in first megabyte of values for system
              registers (see #03665)
        interrupts disabled
Return: interrupts disabled
        GDTR, IDTR, LDTR, TR loaded
        SS:ESP must have at least 16 bytes space, and the entry point is
              required to set up a new stack before enabling interrupts
        EAX, ESI, DS, ES, FS, GS destroyed
Note:   in protected mode, calling the protected-mode VCPI entry point with
          AX = DE0Ch
          DS = segment selector mapping entire linear address space obtained
                  via AX=DE01h
          SS:ESP in first megabyte of linear memory
          STACK:QWORD  return address from FAR call to 32-bit segment
                DWORD  EIP
                DWORD  CS
                DWORD  reserved for EFLAGS
                DWORD  ESP
                DWORD  SS
                DWORD  ES
                DWORD  DS
                DWORD  FS
                DWORD  GS
          and interrupts disabled, will switch to virtual86 mode with
            interrupts disabled, all segment registers loaded, and EAX
            destroyed.
SeeAlso: AH=3Fh,INT 15/AH=89h,INT D4/AH=10h

Format of system register values for switch to protected mode:
Offset  Size    Description     (Table 03665)
 00h    DWORD   value for CR3
 04h    DWORD   linear address in first megabyte of value for GDTR
 08h    DWORD   linear address in first megabyte of value for IDTR
 0Ch    WORD    value for LDTR
 0Eh    WORD    value for TR
 10h    PWORD   CS:EIP of protected mode entry-point
--------m-67DE0F-----------------------------
INT 67 - Netroom3 - ???
        AX = DE0Fh
        ???
Return: ???
Note:   called by Netroom's DPMI.EXE
--------m-67EF-------------------------------
INT 67 - RM386 v6.00+ - EXECUTE XMS FUNCTION
        AH = EFh
        AL = function (00h-12h,80h-8Fh)
        other register as appropriate for XMS function
Return: varies by function (see INT 2F/AX=4310h"XMS")
Note:   these functions appear to be equivalent to the XMS functions with the
          same numbers
SeeAlso: AX=5DFFh"RM386",INT 2F/AX=4310h"XMS"
--------m-67FFA5-----------------------------
INT 67 - Microsoft EMM386.EXE v4.20+ - INSTALLATION CHECK
        AX = FFA5h
Return: AX = 845Ah/84A5h if loaded
            BX:CX -> API entry point (see #03666)
Notes:  this call is available even if EMM386 is not providing EMS
        the returned AX is 845Ah inside of MSWindows, 84A5h under bare DOS
        if no other program has hooked INT 67, an alternate installation
          check is to test for the string
          "MICROSOFT EXPANDED MEMORY MANAGER 386" at offset 14h in the INT 67
          handler's segment; the word immediately preceding this string
          contains the offset of the API entry point
SeeAlso: AH=3Fh,AX=FFA5h/BX=4345h,INT 21/AX=4402h"EMM386.EXE"

(Table 03666)
Call EMM386.EXE API entry point with:
        AH = 00h get memory manager's status
            Return: AH = status
                        bit 0: not active (OFF)
                        bit 1: in "Auto" mode
        AH = 01h set memory manager's state
            AL = new state (00h ON, 01h OFF, 02h AUTO)
        AH = 02h Weitek coprocessor support
            AL = subfunction
                00h get Weitek support state
                    Return: AL = status
                                bit 0: Weitek coprocessor is present
                                bit 1: Weitek support is enabled
                01h turn on Weitek support
                02h turn off Weitek support
     --- v4.20-4.41 only ---
        AH = 03h Windows support???
            AL = subfunction (00h, 01h)
        AH = 04h print copyright notice to standard output
                 (using INT 21/AH=09h)
        AH = 05h print available report
                 (the one shown when running EMM386 from the DOS prompt)
SeeAlso: #01513 at INT 21/AX=4402h/SF=02h,#02617 at INT 2F/AX=12FFh/BX=0106h
--------m-67FFA5BX4345-----------------------
INT 67 U - Compaq CEMM v5.10+ - PRIVATE API
        AX = FFA5h
        BX = 4345h ("CE")
        DX = subfunction
            0000h unshadow video ROM???
            0001h shadow video ROM???
            0002h map pages
                CX = number of pages (00h=one)
                ESI = linear address of first page to map into address space
                EDI = linear starting address at which pages are to be visible
            0003h get ???
                Return: DX = ??? (0-2)
            0004h BUG: crashes system due to fencepost error
Return: AH = 84h
        AL = status (84h = error, FFh = success)
Note:   if BX <> 4345h or DX > 0004h on entry, CEMM behaves identically to
          Microsoft's EMM386 (see AX=FFA5h"EMM386")
SeeAlso: AX=FFA5h"EMM386",#01513 at INT 21/AX=4402h/SF=02h,#03666
--------I-68---------------------------------
INT 68 - Sangoma CCPOP 3270 resident module
SeeAlso: INT 67"Sangoma",INT 92"Sangoma"
--------N-68---------------------------------
INT 68 - Novell NetWare LU6.2
InstallCheck:   test for the signature string "APPC/PC" nine bytes before the
          interrupt handler
SeeAlso: AH=01h/SF=1B00h,AH=FAh
--------h-68---------------------------------
INT 68 C - HP Vectra AT - IRQ16 - 8041 SERVICE REQUEST
SeeAlso: INT 08"IRQ0",INT 69"HP Vectra",INT 6F/AH=00h"HP"
--------N-6801--SF1B00-----------------------
INT 68 - APPC/PC - NETWORK DEVICE CONTROL - DISPLAY
        AH = 01h subfn 1B00h
        DS:DX -> control block (see #03667)
Return: control block updated
SeeAlso: AH=01h/SF=2000h,AH=01h/SF=2B00h,INT 68"Novell"

Format of APPC/PC "DISPLAY" control block:
Offset  Size    Description     (Table 03667)
 00h 12 BYTEs   reserved
 0Ch    WORD    1B00h (verb "DISPLAY")
 0Eh  6 BYTEs   00h
 14h    DWORD   (big-endian) return code (see #03668)
 18h    WORD    00h
 1Ah  8 BYTEs   (big-endian) logical unit ID
 22h  8 BYTEs   (big-endian) partner logical unit name
 2Ah  8 BYTEs   (big-endian) mode name
 32h    BYTE    logical unit session limit
 33h    BYTE    partner logical unit session limit
 34h    BYTE    node maximum negotiable session limit
 35h    BYTE    current session limit
 36h    BYTE    minimum negotiated winner limit
 37h    BYTE    maximum negotiated loser limit
 38h    BYTE    active session count
 39h    BYTE    active CONWINNER session count
 3Ah    BYTE    active CONLOSER session count
 3Bh    BYTE    session termination count
 3Ch    BYTE    bit 7: SESSION_TERMINATION_TARGET_DRAIN
                bit 6: SESSION_TERMINATION_SOURCE_DRAIN

(Table 03668)
Values for APPC/PC return code:
 0000h  successful
 0001h  BAD_TP_ID
 0002h  BAD_CONV_ID
 0003h  bad logical unit ID
 0008h  no physical unit attached
 0110h  bad state
 01B1h  BAD_PART_LUNAME
 01B2h  bad mode name
 0201h  physical unit already active
 0211h  logical unit already active
 0212h  BAD_PART_SESS
 0213h  BAD_RU_SIZES
 0214h  BAD_MODE_SESS
 0216h  BAD_PACING_CNT
 0219h  EXTREME_RUS
 021Ah  SNASVCMG_1
 0223h  SSCP_CONNECTED_LU
 0230h  invalid change
 0243h  too many TPs
 0272h  adapter close failure
 0281h  GET_ALLOC_BAD_TYPE
 0282h  unsuccessful
 0283h  DLC failure
 0284h  unrecognized DLC
 0286h  duplicate DLC
 0301h  SSCP_PU_SESSION_NOT_ACTIVE
 0302h  data exceeds RU size
 0401h  invalid direction
 0402h  invalid type
 0403h  segment overlap
 0404h  invalid first character
 0405h  table error
 0406h  conversion error
 F0010000h      APPC disabled
 F0020000h      APPC busy
 F0030000h      APPC abended
 F0040000h      incomplete
--------N-6801--SF2000-----------------------
INT 68 - APPC/PC - NETWORK DEVICE CONTROL - ATTACH PHYSICAL UNIT
        AH = 01h subfn 2000h
        DS:DX -> control block (see #03669)
Return: control block updated
SeeAlso: AH=01h/SF=2100h,AH=01h/SF=2B00h

Format of APPC/PC "Attach Physical Unit" control block:
Offset  Size    Description     (Table 03669)
 00h 12 BYTEs   reserved
 0Ch    WORD    2000h (verb "Attach Physical Unit")
 0Eh  6 BYTEs   00h
 14h    DWORD   (big-endian) return code (see #03668)
 18h    WORD    00h
 1Ah    BYTE    version
 1Bh    BYTE    release
 1Ch  8 BYTEs   (big-endian) net name
 24h  8 BYTEs   (big-endian) physical unit name
 2Ch  8 BYTEs   00h
 34h    DWORD   pointer to SYSTEM_LOG_EXIT routine, FFFFFFFFh=don't log errors
                (see also AH=01h/SF=2100h)
 38h    DWORD   00h
 3Ch    BYTE    00h RETURN_CONTROL: COMPLETE
                01h RETURN_CONTROL: INCOMPLETE
--------N-6801--SF2100-----------------------
INT 68 - APPC/PC - NETWORK DEVICE CONTROL - ATTACH LOGICAL UNIT
        AH = 01h subfn 2100h
        DS:DX -> control block (see #03670)
Return: control block updated
SeeAlso: #03673,#03674,#03676,AH=01h/SF=2000h,AH=01h/SF=2200h,AH=01h/SF=2B00h

Format of APPC/PC "Attach Logical Unit" control block:
Offset  Size    Description     (Table 03670)
 00h 12 BYTEs   reserved
 0Ch    WORD    2100h (verb "Attach Logical Unit")
 0Eh  6 BYTEs   00h
 14h    DWORD   (big-endian) return code (see #03668)
 18h    WORD    70  offset to partner logical unit record
 1Ah  8 BYTEs   (big-endian) logical unit name
 22h  8 BYTEs   (big-endian) logical unit ID
 2Ah    BYTE    logical unit local address
 2Bh    BYTE    logical unit session limit
 2Ch    DWORD   pointer to CREATE_TP_EXIT routine,
                FFFFFFFFh = reject incoming ALLOCATEs
                00000000h = queue ALLOCATEs
 30h    DWORD   00h
 34h    DWORD   pointer to SYSTEM_LOG_EXIT routine, FFFFFFFFh=don't log errors
 38h    DWORD   00h
 3Ch    BYTE    maximum TPs
 3Dh    BYTE    queue depth
 3Eh    DWORD   pointer to LU_LU_PASSWORD_EXIT routine, FFFFFFFFh=no pswd exit
 42h    DWORD   00h
 46h    WORD    total length of partner records
 48h    var     array of partner logical unit records (see #03671)
SeeAlso: #03673,#03674,#03676

Format of APPC/PC partner logical unit record:
Offset  Size    Description     (Table 03671)
 00h    WORD    length of this partner logical unit record
 02h    WORD    42  offset to mode records
 04h  8 BYTEs   (big-endian) partner logical unit name
 0Ch    BYTE    partner logical unit security capabilities
                bit 7: already verified
                bit 6: conversation level security
                bit 5: session level security
 0Dh    BYTE    partner logical unit session limit
 0Eh    WORD    partner logical unit maximum MC_SEND_LL
 10h  8 BYTEs   (big-endian) partner logical unit DLC name
 18h    BYTE    partner logical unit adapter number
 19h 17 BYTEs   (counted string) partner logical unit adapter address
 2Ah    WORD    total length of mode records
 2Ch 16N BYTEs  array of mode records (see #03672)

Format of mode record:
Offset  Size    Description     (Table 03672)
 00h    WORD    16  length of this mode record
 02h  8 BYTEs   (big-endian) mode name
 0Ah    WORD    RU_SIZE high bound
 0Ch    WORD    RU_SIZE low bound
 0Eh    BYTE    mode maximum negotiable session limit
 0Fh    BYTE    pacing size for receive

Routines defined by LU_LU_PASSWORD_EXIT, CREATE_TP_EXIT, and SYSTEM_LOG_EXIT
pointers are called by pushing the DWORD pointer to the verb on the stack and
then performing a FAR call.

Format of ACCESS_LU_LU_PW verb:
Offset  Size    Description     (Table 03673)
 00h 12 BYTEs   reserved
 0Ch    WORD    1900h (verb "ACCESS_LU_LU_PW")
 0Eh  8 BYTEs   (big-endian) logical unit ID
 16h  8 BYTEs   (big-endian) logical unit name
 1Eh  8 BYTEs   (big-endian) partner logical unit name
 26h 17 BYTEs   (counted string) partner fully qualified logical unit name
 37h    BYTE    password available (0=no, 1=yes)
 38h  8 BYTEs   password
SeeAlso: #03670,#03674,#03676

Format of CREATE_TP verb:
Offset  Size    Description     (Table 03674)
 00h 12 BYTEs   reserved
 0Ch    WORD    2300h (verb "CREATE_TP")
 0Eh  6 BYTEs   00h
 14h    DWORD   (big-endian) sense code (see #03675)
 18h  8 BYTEs   (big-endian) TP ID
 20h  8 BYTEs   (big-endian) logical unit ID
 28h    DWORD   (big-endian) conversation ID
 2Ch    BYTE    0 basic conversation, 1 mapped conversation
 2Dh    BYTE    0 no sync level, 1 confirm
 2Eh    BYTE    reserved
 2Fh 65 BYTEs   (counted string) transaction program name
 70h  6 BYTEs   00h
 76h    WORD    length of ERROR_LOG_DATA to return
 78h    DWORD   pointer to ERROR_LOG_DATA buffer
 7Ch  8 BYTEs   (big-endian) partner logical unit name
 84h 18 BYTEs   (counted string) partner fully qualified logical unit name
 96h  8 BYTEs   (big-endian) mode name
 9Eh 12 BYTEs   00h
 AAh 11 BYTEs   (counted string) password
 B5h 11 BYTEs   (counted string) user ID
 C0h    BYTE    0 verification should be performed
                1 already verified
SeeAlso: #03673,#03676

(Table 03675)
Values for APPC/PC sense code:
 00000000h      Ok
 080F6051h      SECURITY_NOT_VALID
 084B6031h      TP_NOT_AVAIL_RETRY
 084C0000h      TP_NOT_AVAIL_NO_RETRY
 10086021h      TP_NAME_NOT_RECOGNIZED
 10086034h      CONVERSATION_TYPE_MISMATCH
 10086041h      SYNC_LEVEL_NOT_SUPPORTED

Format of SYSLOG verb:
Offset  Size    Description     (Table 03676)
 00h 12 BYTEs   reserved
 0Ch    WORD    2600h (verb "SYSLOG")
 0Eh 10 BYTEs   00h
 18h    WORD    (big-endian) type
 1Ah    DWORD   (big-endian) subtype
 1Eh    DWORD   pointer to ADDITIONAL_INFO
 22h    DWORD   (big-endian) conversation ID
 26h  8 BYTEs   (big-endian) TP ID
 2Eh  8 BYTEs   (big-endian) physical unit or logical unit name
 36h    WORD    length of data
 38h    DWORD   pointer to data
 3Ch    BYTE    00h
SeeAlso: #03673,#03674
--------N-6801--SF2200-----------------------
INT 68 - APPC/PC - NETWORK DEVICE CONTROL - DETACH LOGICAL UNIT
        AH = 01h subfn 2200h
        DS:DX -> control block (see #03677)
Return: control block updated
SeeAlso: AH=01h/SF=2000h,AH=01h/SF=2100h,AH=01h/SF=2700h

Format of APPC/PC "Detach Logical Unit" control block:
Offset  Size    Description     (Table 03677)
 00h 12 BYTEs   reserved
 0Ch    WORD    2200h (verb "Detach Logical Unit")
 0Eh  6 BYTEs   00h
 14h    DWORD   (big-endian) return code (see #03668)
 18h  8 BYTEs   (big-endian) logical unit ID
 20h    BYTE    00h
--------N-6801--SF2700-----------------------
INT 68 - APPC/PC - NETWORK DEVICE CONTROL - DETACH PHYSICAL UNIT
        AH = 01h subfn 2700h
        DS:DX -> control block (see #03678)
Return: control block updated
SeeAlso: AH=01h/SF=2000h,AH=01h/SF=2100h,AH=01h/SF=2200h

Format of APPC/PC "Detach Physical Unit" control block:
Offset  Size    Description     (Table 03678)
 00h 12 BYTEs   reserved
 0Ch    WORD    2700h (verb "Detach Physical Unit")
 0Eh  6 BYTEs   00h
 14h    DWORD   (big-endian) return code (see #03668)
 18h    BYTE    00h  type: hard
                01h  type: soft
--------N-6801--SF2B00-----------------------
INT 68 - APPC/PC - NETWORK DEVICE CONTROL - ACTIVATE DLC
        AH = 01h subfn 2B00h
        DS:DX -> control block (see #03679)
Return: control block updated
SeeAlso: AH=01h/SF=1B00h,AH=01h/SF=2000h

Format of APPC/PC "Activate DLC" control block:
Offset  Size    Description     (Table 03679)
 00h 12 BYTEs   reserved
 0Ch    WORD    2B00h (verb "Activate DLC")
 0Eh  6 BYTEs   00h
 14h    DWORD   (big-endian) return code (see #03668)
 18h  8 BYTEs   (big-endian) DLC name
 20h    BYTE    adapter number
--------N-6802--SF0100-----------------------
INT 68 - APPC/PC - CONNECTION CONTROL - ALLOCATE
        AH = 02h subfn 0100h
        DS:DX -> control block (see #03680)
Return: control block updated
SeeAlso: AH=02h/SF=0500h

Format of APPC/PC "Allocate" control block:
Offset  Size    Description     (Table 03680)
 00h 12 BYTEs   reserved
 0Ch    WORD    0100h (verb "Allocate" or "MC_Allocate")
 0Eh    BYTE    1 if MC_ (mapped conversation) form of verb
                0 if basic verb
 0Fh  5 BYTEs   reserved (0)
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) error code (see #03682)
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   (big-endian) conversation ID
 26h    BYTE    (MC_Allocate only) conversation type
                0 basic conversation
                1 mapped conversation
 27h    BYTE    SYNC_LEVEL (00h none, 01h confirm)
 28h    WORD    0000h
 2Ah    BYTE    RETURN_CONTROL
                00h when session allocated
                01h immediate
                02h when session free
 2Bh  8 BYTEs   00h
 33h  8 BYTEs   (big-endian) partner logical unit name
 3Bh  8 BYTEs   (big-endian) mode name
 43h 65 BYTEs   (counted string) TP name
 84h    BYTE    security (00h none, 01h same, 02h pgm)
 85h 11 BYTEs   00h
 90h 11 BYTEs   (counted string) password
 9Bh 11 BYTEs   (counted string) user ID
 A6h    WORD    PIP_DATA length
 A8h    DWORD   pointer to PIP_DATA

(Table 03681)
Values for APPC/PC primary return code:
 0000h  successful
 0001h  parameter check
 0002h  state check
 0003h  allocation error
 0005h  deallocate abended
 0006h  deallocate abended program
 0007h  deallocate abended SVC
 0008h  deallocate abended timer
 0009h  deallocate normal return
 000Ah  data posting blocked
 000Bh  posting not active
 000Ch  PROG_ERROR_NO_TRUNC
 000Dh  PROG_ERROR_TRUNC
 000Eh  PROG_ERROR_PURGING
 000Fh  CONV_FAILURE_RETRY
 0010h  CONV_FAILURE_NO_RETRY
 0011h  SVC_ERROR_NO_TRUNC
 0012h  SVC_ERROR_TRUNC
 0013h  SVC_ERROR_PURGING
 0014h  unsuccessful
 0018h  CNOS partner logical unit reject
 0019h  conversation type mixed
 F001h  APPC disabled
 F002h  APPC busy
 F003h  APPC abended
 F004h  incomplete

(Table 03682)
Values for APPC/PC error code:
 0001h  bad TP ID
 0002h  bad conversation ID
 0004h  allocation error, no retry
 0005h  allocation error, retry
 0006h  data area crosses segment boundary
 0010h  bad TPN length
 0011h  bad CONV length
 0012h  bad SYNC level
 0013h  bad security selection
 0014h  bad return control
 0015h  SEC_TOKENS too big
 0016h  PIP_LEN incorrect
 0017h  no use of SNASVCMG
 0018h  unknown partner mode
 0031h  confirm: SYNC_NONE
 0032h  confirm: bad state
 0033h  confirm: NOT_LL_BDY
 0041h  confirmed: bad state
 0051h  deallocate: bad type
 0052h  deallocate: flush bad state
 0053h  deallocate: confirm bad state
 0055h  deallocate: NOT_LL_BDY
 0057h  deallocate: log LL_WRONG
 0061h  flush: not send state
 0091h  post on receipt: invalid length
 0092h  post on receipt: not in receive state
 0093h  post on receipt: bad fill
 00A1h  prepare to receive:invalid type
 00A2h  prepare to receive: unfinished LL
 00A3h  prepare to receive: not in send state
 00B1h  receive and wait: bad state
 00B2h  receive and wait: NOT_LL_BDY
 00B5h  receive and wait: bad fill
 00C1h  receive immediate: not in receive state
 00C4h  receive immediate: bad fill
 00E1h  request to send: not in receive state
 00F1h  send data: bad LL
 00F2h  send data: not in send state
 0102h  send error: log LL wrong
 0103h  send error: bad type
 0121h  test: invalid type
 0122h  test: not in receive state
--------N-6802--SF0300-----------------------
INT 68 - APPC/PC - CONNECTION CONTROL - CONFIRM
        AH = 02h subfn 0300h
        DS:DX -> control block (see #03683)
Return: control block updated
SeeAlso: AH=02h/SF=0400h

Format of APPC/PC "Confirm" control block:
Offset  Size    Description     (Table 03683)
 00h 12 BYTEs   reserved
 0Ch    WORD    0300h (verb "Confirm" or "MC_Confirm")
 0Eh    BYTE    1 if MC_ (mapped conversation) form of verb
                0 if basic verb
 0Fh  5 BYTEs   reserved (0)
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) error code (see #03682)
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   (big-endian) conversation ID
 26h    BYTE    request to send received (0=no, 1=yes)
--------N-6802--SF0400-----------------------
INT 68 - APPC/PC - CONNECTION CONTROL - CONFIRMED
        AH = 02h subfn 0400h
        DS:DX -> control block (see #03684)
Return: control block updated
SeeAlso: AH=02h/SF=0300h

Format of APPC/PC "Confirmed" control block:
Offset  Size    Description     (Table 03684)
 00h 12 BYTEs   reserved
 0Ch    WORD    0400h (verb "Confirmed" or "MC_Confirmed")
 0Eh    BYTE    1 if MC_ (mapped conversation) form of verb
                0 if basic verb
 0Fh  5 BYTEs   reserved (0)
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) error code (see #03682)
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   (big-endian) conversation ID
--------N-6802--SF0500-----------------------
INT 68 - APPC/PC - CONNECTION CONTROL - DEALLOCATE
        AH = 02h subfn 0500h
        DS:DX -> control block (see #03685)
Return: control block updated
SeeAlso: AH=02h/SF=0100h,AH=02h/SF=0300h

Format of APPC/PC "Deallocate" control block:
Offset  Size    Description     (Table 03685)
 00h 12 BYTEs   reserved
 0Ch    WORD    0500h (verb "Deallocate" or "MC_Deallocate")
 0Eh    BYTE    1 if MC_ (mapped conversation) form of verb
                0 if basic verb
 0Fh  5 BYTEs   reserved (0)
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) error code (see #03682)
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   (big-endian) conversation ID
 26h    BYTE    00h
 27h    BYTE    type
                00h SYNC_LEVEL
                01h FLUSH
                02h ABEND_PROC
                03h ABEND_SVC
                04h ABEND_TIMER
                05h ABEND
 28h    WORD    (MC_Deallocate only) length of error log data
 2Ah    DWORD   (MC_Deallocate only) pointer to error log data
--------N-6802--SF0600-----------------------
INT 68 - APPC/PC - CONNECTION CONTROL - FLUSH
        AH = 02h subfn 0600h
        DS:DX -> control block (see #03686)
Return: control block updated
SeeAlso: AH=02h/SF=0300h

Format of APPC/PC "Flush" control block:
Offset  Size    Description     (Table 03686)
 00h 12 BYTEs   reserved
 0Ch    WORD    0600h (verb "Flush" or "MC_Flush")
 0Eh    BYTE    1 if MC_ (mapped conversation) form of verb
                0 if basic verb
 0Fh  5 BYTEs   reserved (0)
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) error code (see #03682)
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   (big-endian) conversation ID
--------N-6802--SF0700-----------------------
INT 68 - APPC/PC - CONNECTION CONTROL - GET ATTRIBUTES
        AH = 02h subfn 0700h
        DS:DX -> control block (see #03687)
Return: control block updated
SeeAlso: AH=02h/SF=0300h

Format of APPC/PC "Get_Attributes" control block:
Offset  Size    Description     (Table 03687)
 00h 12 BYTEs   reserved
 0Ch    WORD    0700h (verb "Get_Attributes" or "MC_Get_Attributes")
 0Eh    BYTE    1 if MC_ (mapped conversation) form of verb
                0 if basic verb
 0Fh  5 BYTEs   reserved (0)
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) error code (see #03682)
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   (big-endian) conversation ID
 26h  8 BYTEs   (big-endian) logical unit ID
 2Eh    BYTE    00h
 2Fh    BYTE    SYNC_LEVEL (0=none, 1=confirm)
 30h  8 BYTEs   (big-endian) mode name
 38h  8 BYTEs   (big-endian) own net name
 40h  8 BYTEs   (big-endian) own logical unit name
 48h  8 BYTEs   (big-endian) partner logical unit name
 50h 18 BYTEs   (counted string) partner's fully qualified logical unit name
 62h    BYTE    00h
 63h 11 BYTEs   (counted string) user ID
--------N-6802--SF0800-----------------------
INT 68 - APPC/PC - CONNECTION CONTROL - GET CONVERSATION TYPE
        AH = 02h subfn 0800h
        DS:DX -> control block (see #03688)
Return: control block updated
SeeAlso: AH=02h/SF=0300h

Format of APPC/PC "Get_Type" control block:
Offset  Size    Description     (Table 03688)
 00h 12 BYTEs   reserved
 0Ch    WORD    0800h (verb "Get_Type")
 0Eh    BYTE    1 if MC_ (mapped conversation) form of verb
                0 if basic verb
 0Fh  5 BYTEs   reserved (0)
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) error code (see #03682)
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   (big-endian) conversation ID
 26h    BYTE    (ret) type (0=basic conversation, 1=mapped conversation)
--------N-6802--SF0900-----------------------
INT 68 - APPC/PC - CONNECTION CONTROL - POST ON RECEIPT
        AH = 02h subfn 0900h
        DS:DX -> control block (see #03689)
Return: control block updated
SeeAlso: AH=02h/SF=0A00h

Format of APPC/PC "Post_on_Receipt" control block:
Offset  Size    Description     (Table 03689)
 00h 12 BYTEs   reserved
 0Ch    WORD    0900h (verb "Post_on_Receipt")
 0Eh    BYTE    1 if MC_ (mapped conversation) form of verb
                0 if basic verb
 0Fh  5 BYTEs   reserved (0)
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) error code (see #03682)
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   (big-endian) conversation ID
 26h    WORD    maximum length
 28h    BYTE    fill (0=buffer, 1=LL)
--------N-6802--SF0A00-----------------------
INT 68 - APPC/PC - CONNECTION CONTROL - PREPARE TO RECEIVE
        AH = 02h subfn 0A00h
        DS:DX -> control block (see #03690)
Return: control block updated
SeeAlso: AH=02h/SF=0900h,AH=02h/SF=0B00h

Format of APPC/PC "Prepare_to_Receive" control block:
Offset  Size    Description     (Table 03690)
 00h 12 BYTEs   reserved
 0Ch    WORD    0A00h (verb "Prepare_to_Receive" or "MC_Prepare_to_Receive")
 0Eh    BYTE    1 if MC_ (mapped conversation) form of verb
                0 if basic verb
 0Fh  5 BYTEs   reserved (0)
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) error code (see #03682)
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   (big-endian) conversation ID
 26h    BYTE    type (0=SYNC_LEVEL, 1=FLUSH)
 27h    BYTE    locks (0=short, 1=long)
--------N-6802--SF0B00-----------------------
INT 68 - APPC/PC - CONNECTION CONTROL - RECEIVE AND WAIT
        AH = 02h subfn 0B00h
        DS:DX -> control block (see #03691)
Return: control block updated
SeeAlso: AH=02h/SF=0C00h,AH=02h/SF=0F00h

Format of APPC/PC "Receive_and_Wait" control block:
Offset  Size    Description     (Table 03691)
 00h 12 BYTEs   reserved
 0Ch    WORD    0B00h (verb "Receive_and_Wait" or "MC_Receive_and_Wait")
 0Eh    BYTE    1 if MC_ (mapped conversation) form of verb
                0 if basic verb
 0Fh  5 BYTEs   reserved (0)
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) error code (see #03682)
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   (big-endian) conversation ID
 26h    BYTE    type of information received (see #03692)
 27h    BYTE    (MC_Receive_and_Wait only) fill (0=buffer, 1=LL)
 28h    BYTE    Request_to_Send_Received (0=no, 1=yes)
 29h    WORD    maximum length
 2Bh    WORD    data length
 2Dh    DWORD   pointer to data

(Table 03692)
Values for type of information received:
 00h    data
 01h    data complete
 02h    data incomplete
 03h    confirm
 04h    confirm send
 05h    confirm deallocate
 06h    send
--------N-6802--SF0C00-----------------------
INT 68 - APPC/PC - CONNECTION CONTROL - RECEIVE IMMEDIATE
        AH = 02h subfn 0C00h
        DS:DX -> control block (see #03693)
Return: control block updated
SeeAlso: AH=02h/SF=0B00h,AH=02h/SF=0F00h

Format of APPC/PC "Receive_Immediate" control block:
Offset  Size    Description     (Table 03693)
 00h 12 BYTEs   reserved
 0Ch    WORD    0C00h (verb "Receive_Immediate" or "MC_Receive_Immediate")
 0Eh    BYTE    1 if MC_ (mapped conversation) form of verb
                0 if basic verb
 0Fh  5 BYTEs   reserved (0)
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) error code (see #03682)
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   (big-endian) conversation ID
 26h    BYTE    type of information received (see #03692)
 27h    BYTE    (MC_Receive_Immediate only) fill (0=buffer, 1=LL)
 28h    BYTE    Request_to_Send_Received (0=no, 1=yes)
 29h    WORD    maximum length
 2Bh    WORD    data length
 2Dh    DWORD   pointer to data
--------N-6802--SF0E00-----------------------
INT 68 - APPC/PC - CONNECTION CONTROL - REQUEST TO SEND
        AH = 02h subfn 0E00h
        DS:DX -> control block (see #03694)
Return: control block updated
SeeAlso: AH=02h/SF=0F00h,AH=02h/SF=1000h

Format of APPC/PC "Request_to_Send" control block:
Offset  Size    Description     (Table 03694)
 00h 12 BYTEs   reserved
 0Ch    WORD    0E00h (verb "Request_to_Send" or "MC_Request_to_Send")
 0Eh    BYTE    1 if MC_ (mapped conversation) form of verb
                0 if basic verb
 0Fh  5 BYTEs   reserved (0)
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) error code (see #03682)
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   (big-endian) conversation ID
--------N-6802--SF0F00-----------------------
INT 68 - APPC/PC - CONNECTION CONTROL - SEND DATA
        AH = 02h subfn 0F00h
        DS:DX -> control block (see #03695)
Return: control block updated
SeeAlso: AH=02h/SF=0E00h,AH=02h/SF=1000h

Format of APPC/PC "Send_Data" control block:
Offset  Size    Description     (Table 03695)
 00h 12 BYTEs   reserved
 0Ch    WORD    0F00h (verb "Send_Data" or "MC_Send_Data")
 0Eh    BYTE    1 if MC_ (mapped conversation) form of verb
                0 if basic verb
 0Fh  5 BYTEs   reserved (0)
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) error code (see #03682)
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   (big-endian) conversation ID
 26h    BYTE    request to send received (0=no, 1=yes)
 27h    BYTE    00h
 28h    WORD    data length
 2Ah    DWORD   pointer to data
--------N-6802--SF1000-----------------------
INT 68 - APPC/PC - CONNECTION CONTROL - SEND ERROR
        AH = 02h subfn 1000h
        DS:DX -> control block (see #03696)
Return: control block updated
SeeAlso: AH=02h/SF=0F00h

Format of APPC/PC "Send_Error" control block:
Offset  Size    Description     (Table 03696)
 00h 12 BYTEs   reserved
 0Ch    WORD    1000h (verb "Send_Error" or "MC_Send_Error")
 0Eh    BYTE    1 if MC_ (mapped conversation) form of verb
                0 if basic verb
 0Fh  5 BYTEs   reserved (0)
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) error code (see #03682)
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   (big-endian) conversation ID
 26h    BYTE    request to send received (0=no, 1=yes)
 27h    BYTE    type (0=program, 1=SVC)
 28h    DWORD   00h
 2Ch    WORD    (MC_Send_Error only) LOG_DATA length
 2Eh    DWORD   (MC_Send_Error only) pointer to LOG_DATA
--------N-6802--SF1200-----------------------
INT 68 - APPC/PC - CONNECTION CONTROL - TEST
        AH = 02h subfn 1200h
        DS:DX -> control block (see #03697)
Return: control block updated
SeeAlso: AH=02h/SF=1300h

Format of APPC/PC "Test" control block:
Offset  Size    Description     (Table 03697)
 00h 12 BYTEs   reserved
 0Ch    WORD    1200h (verb "Test" or "MC_Test")
 0Eh    BYTE    1 if MC_ (mapped conversation) form of verb
                0 if basic verb
 0Fh  5 BYTEs   reserved (0)
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) error code (see #03682)
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   (big-endian) conversation ID
 26h    BYTE    (MC_Test only) test (0=posted, 1=request_to_send received)
Note:   error code has different interpretations for:
        0 posted data
        1 posted not data (primary return code = 0)
        1 bad TP_ID (primary return code = 1)
--------N-6802--SF1300-----------------------
INT 68 - APPC/PC - CONNECTION CONTROL - WAIT
        AH = 02h subfn 1300h
        DS:DX -> control block (see #03698)
Return: control block updated
SeeAlso: AH=02h/SF=1200h

Format of APPC/PC "Wait" control block:
Offset  Size    Description     (Table 03698)
 00h 12 BYTEs   reserved
 0Ch    WORD    1300h (verb "Wait")
 0Eh    BYTE    1 if MC_ (mapped conversation) form of verb
                0 if basic verb
 0Fh  5 BYTEs   reserved (0)
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) error code (see #03682,#03697)
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   (big-endian) conversation ID
 26h    BYTE    number of conversations to wait on
                Note: error codes have interpretations as for AH=02h/SF=1200h
--------N-6803--SF2400-----------------------
INT 68 - APPC/PC - TP STARTED
        AH = 03h subfn 2400h
        DS:DX -> control block (see #03699)
Return: control block updated

Format of APPC/PC "TP Started" control block:
Offset  Size    Description     (Table 03699)
 00h 12 BYTEs   reserved
 0Ch    WORD    2400h (verb "TP Started")
 0Eh  6 BYTEs   00h
 14h    DWORD   (big-endian) return code (see #03668)
 18h    WORD    00h
 1Ah  8 BYTEs   (big-endian) logical unit ID
 22h  8 BYTEs   (big-endian) TP ID
--------N-6803--SF2800-----------------------
INT 68 - APPC/PC - GET ALLOCATE
        AH = 03h subfn 2800h
        DS:DX -> control block (see #03700)
Return: control block updated

Format of APPC/PC "Get ALLOCATE" control block:
Offset  Size    Description     (Table 03700)
 00h 12 BYTEs   reserved
 0Ch    WORD    2800h (verb "Get ALLOCATE")
 0Eh  6 BYTEs   00h
 14h    DWORD   (big-endian) return code (see #03668)
 18h    WORD    00h
 1Ah  8 BYTEs   (big-endian) logical unit ID
 22h    BYTE    type (00h dequeue, 01h test)
 23h    DWORD   pointer to CREATE_TP record
--------N-6803--SF2A00-----------------------
INT 68 - APPC/PC - CHANGE LOGICAL UNIT
        AH = 03h subfn 2A00h
        DS:DX -> control block (see #03701)
Return: control block updated

Format of APPC/PC "Change Logical Unit" control block:
Offset  Size    Description     (Table 03701)
 00h 12 BYTEs   reserved
 0Ch    WORD    2A00h (verb "Change Logical Unit")
 0Eh  6 BYTEs   00h
 14h    DWORD   (big-endian) return code (see #03668)
 18h    WORD    00h
 1Ah  8 BYTEs   (big-endian) logical unit ID
 22h    DWORD   pointer to CREATE_TP_EXIT routine
                00000000h queue ALLOCATEs
                FFFFFFFFh reject incoming ALLOCATEs
 26h    DWORD   00000000h
 2Ah    DWORD   pointer to SYSTEM_LOG_EXIT routine, FFFFFFFFh= don't log errors
 2Eh    DWORD   00000000h
 32h    BYTE    maximum TPs
 33h    BYTE    00h stop QUEUE_ALLOCATEs
                01h resume QUEUE_ALLOCATEs
 34h    DWORD   pointer to LU_LU_PASSWORD_EXIT routine, FFFFFFFFh = no exit
 38h    DWORD   00000000h
--------N-6804-------------------------------
INT 68 - APPC/PC - TRANSACTION PROCESSING
        AH = 04h
        DS:DX -> control block (see #03702)
Return: control block updated

Format of APPC/PC control block:
Offset  Size    Description     (Table 03702)
 00h 12 BYTEs   reserved
 0Ch    WORD    verb (action)
                2500h TP_ENDED
                2900h TP_VALID
 0Eh  6 BYTEs   00h
 14h    DWORD   (big-endian) return code (see #03668)
 18h    WORD    00h
 1Ah  8 BYTEs   (big-endian) TP_ID
 22h    DWORD   -> CREATE_TP record (only if verb = 2900h)
--------N-6805-------------------------------
INT 68 - APPC/PC - TRANSFER MESSAGE DATA
        AH = 05h
        DS:DX -> control block (see #03703)
Return: control block updated

Format of APPC/PC "Transfer Message Data" control block:
Offset  Size    Description     (Table 03703)
 00h 12 BYTEs   reserved
 0Ch    WORD    1C00h (verb "Transfer Message Data")
 0Eh    BYTE    data type
                00h user defined
                01h NMVT
                02h alert subvectors
                03h PDSTATS subvectors
 0Fh  5 BYTEs   00h
 14h    DWORD   (big-endian) return code (see #03668)
 18h 12 BYTEs   00h
 24h    BYTE    flags (see #03704)
 25h    BYTE    00h
 26h    WORD    length of data
 28h  N BYTEs   data

Bitfields for APPC/PC message transfer flags:
Bit(s)  Description     (Table 03704)
 0      don't add correlation subvector
 1      don't add product set ID subvector
 2      don't do SYSLOG
 3      don't send SSCP_PU_SESSION
SeeAlso: #03703
--------N-6806-------------------------------
INT 68 - APPC/PC - CHANGE NUMBER OF SESSIONS
        AH = 06h
        DS:DX -> control block (see #03705)
Return: control block updated

Format of APPC/PC "Change Number of Sessions" control block:
Offset  Size    Description     (Table 03705)
 00h 12 BYTEs   reserved
 0Ch    WORD    1500h (verb "Change Number of Sessions")
 0Eh  6 BYTEs   00h
 14h    WORD    (big-endian) primary return code (see #03681)
 16h    DWORD   (big-endian) secondary return code (see #03668,#03706)
 1Ah  8 BYTEs   (big-endian) logical unit ID
 22h  8 BYTEs   blanks
 2Ah  8 BYTEs   (big-endian) partner logical unit name
 32h  8 BYTEs   (big-endian) mode name
 3Ah    BYTE    bit 7: use MODE_NAME_SELECT_ALL rather than MODE_NAME
                bit 6: set negotiable values
 3Bh    BYTE    partner logical unit mode session limit
 3Ch    BYTE    minimum CONWINNERS_SOURCE
 3Dh    BYTE    maximum CONWINNERS_TARGET
 3Eh    BYTE    automatic activation
 3Fh    BYTE    00h
 40h    BYTE    flags
                bit 7: drain target
                bit 6: drain source
                bit 5: target responsible, not source

(Table 03706)
Values for secondary return code (see also AH=01h/SF=1B00h):
 0000h  accepted
 0001h  negotiated
 0003h  bad logical unit ID
 0004h  allocation failure, no retry
 0005h  allocation failure, retry
 0151h  can't raise limits
 0153h  all modes must reset
 0154h  bad SNASVCMG limits
 0155h  minimum greater than total
 0156h  mode closed (primary return code = 1)
        CNOS mode closed (primary return code = 18h)
 0157h  bad mode name (primary return code = 1)
        CNOS bad mode name (primary return code = 18h)
 0159h  reset SNA drains
 015Ah  single not SRC response
 015Bh  bad partner logical unit
 015Ch  exceeds maximum allowed
 015Dh  change SRC drains
 015Eh  logical unit detached
 015Fh  CNOS command race reject
--------N-6807-------------------------------
INT 68 - APPC/PC - PASSTHROUGH
        AH = 07h
        DS:DX -> control block (format depends on application subsystem)
Return: control block updated
SeeAlso: AH=FFh
----------684300-----------------------------
INT 68 U - ??? - INSTALLATION CHECK???
        AX = 4300h
Return: AX = F386h if ???
        ???
Note:   called by Novell DOS 7.0 EMM386.EXE
SeeAlso: AX=4400h,INT 41/AX=004Fh
----------684400-----------------------------
INT 68 U - ???
        AX = 4400h
        BX = ???
        CX = ???
        DX = ???
        DS:SI = real-mode address of protected-mode GDT
        ES:DI = real-mode address of protected-mode IDT
Return: ???
Note:   called by Novell DOS 7.0 EMM386.EXE if AX=4300h returns AX=F386h
SeeAlso: AX=4300h
--------W-6847-------------------------------
INT 68 - MS Windows debugging kernel - OUTPUT STRING
        AH = 47h
        ES:SI -> string
Notes:  output a string (to inform a debugger of some events)
        KERNEL outputs "Windows Kernel Entry\r\n" on startup
SeeAlso: INT 41/AX=0012h
--------N-68FA-------------------------------
INT 68 - APPC/PC - ENABLE/DISABLE APPC
        AH = FAh
        AL bit 0 = new state (0 enable, 1 disable)
SeeAlso: AH=FDh,INT 68"Novell"
--------N-68FB-------------------------------
INT 68 - APPC/PC - CONVERT
        AH = FBh
        DS:DX -> control block (see #03707)
Return: control block updated

Format of APPC/PC "CONVERT" control block:
Offset  Size    Description     (Table 03707)
 00h 12 BYTEs   reserved
 0Ch    WORD    1A00h (verb "CONVERT")
 0Eh  6 BYTEs   00h
 14h    DWORD   (big-endian) return code
 18h    BYTE    conversion
                00h ASCII to EBCDIC
                01h EBCDIC to ASCII
 19h    BYTE    character set
                00h AE
                01h A
                02h G
 1Ah    WORD    length of string to convert
 1Ch    DWORD   pointer to source
 20h    DWORD   pointer to target
--------N-68FC-------------------------------
INT 68 - APPC/PC - ENABLE/DISABLE MESSAGE TRACING
        AH = FCh
        AL = new state
            00h disable tracing
            01h enable tracing
                DX = number of bytes to keep (0=all)
SeeAlso: AH=FDh,AH=FEh
--------N-68FD-------------------------------
INT 68 - APPC/PC - ENABLE/DISABLE API VERB TRACING
        AH = FDh
        AL = new tracing state (00h disabled, 01h enabled)
SeeAlso: AH=FAh,AH=FCh,AH=FEh
--------N-68FE-------------------------------
INT 68 - APPC/PC - SET TRACE DESTINATION
        AH = FEh
        AL = trace destinations (see #03708)
        DS:DX -> trace stats record if AL bit 0 set (see #03709)
SeeAlso: AH=FCh,AH=FDh

Bitfields for trace destinations:
Bit(s)  Description     (Table 03708)
 0      storage (DS:DX -> trace stats record)
 1      display
 2      file (trace written to file OUTPUT.PC)
 3      printer

Format of APPC/PC Trace Statistics Record:
Offset  Size    Description     (Table 03709)
 00h    DWORD   pointer to storage trace buffer
 04h    WORD    max number of 80-byte records in trace
 06h    WORD    (high-order byte first!) current record number (must init to 0)
 08h    DWORD   (high-order byte first!) number of records written (init to 0)
 0Ch    DWORD   reserved
Note:   do not move record while trace is active
--------N-68FF-------------------------------
INT 68 - APPC/PC - SET PASSTHROUGH
        AH = FFh
        DS:DX -> passthrough exit routine
SeeAlso: AH=07h,INT 68"Novell"
--------b-69---------------------------------
INT 69 - Zenith AT BIOS - ???
Note:   called by INT 09 handler
--------h-69---------------------------------
INT 69 C - HP Vectra AT - IRQ17 - KEYBOARD OUTPUT-BUFFER-FULL SERVICE ROUTINE
SeeAlso: INT 09"IRQ1",INT 68"HP Vectra",INT 6A"HP Vectra"
--------N-690100-----------------------------
INT 69 - DECnet DOS CTERM - INSTALLATION CHECK
        AX = 0100h
Return: AL = FFh if present
SeeAlso: AX=010Fh
--------N-690101-----------------------------
INT 69 - DECnet DOS CTERM - SEND BYTE
        AX = 0101h
        BL = character
        DX = session handle
Return: AH >= 80h on error
SeeAlso: AX=0102h
--------N-690102-----------------------------
INT 69 - DECnet DOS CTERM - READ BYTE
        AX = 0102h
        DX = session handle
Return: AH >= 80h on error
        AH < 80h if successful
            AL = character
SeeAlso: AX=0101h
--------N-690103-----------------------------
INT 69 - DECnet DOS CTERM - STATUS
        AX = 0103h
        DX = session handle
Return: AH status flags (see #03710)
        AL = reason code if DECnet error (see #03711)
SeeAlso: AX=0104h

Bitfields for DECnet DOS CTERM status flags:
Bit(s)  Description     (Table 03710)
 7      session has been aborted
 6      DECnet error
 1      trace data available
 0      receive data available

(Table 03711)
Values for reason code:
 00h    normal disconnect
 01h    unknown message from host
 02h    protocol violation from host
 03h    could not process the initiate message
 04h    error receiving message from host
 05h    error sending message to host
 06h    error checking for message from host
 07h    remote system does not support CTERM
 08h    remote system does not support correct protocol version
 09h    did not receive BIND message from host
 0Ah    could not send BIND message to host
 0Bh    no more sessions available
 0Ch    session does not exist
 0Dh    not enough memory to complete operation
 0Eh    connection has broken
Index:  error codes;DECnet DOS CTERM|DECnet DOS CTERM;error codes
--------N-690104-----------------------------
INT 69 - DECnet DOS CTERM - DECnet STATUS
        AX = 0104h
        DX = session handle
Return: AX = reason code (see #03711)
Note:   use this call when AX=0103h returns a DECnet error
SeeAlso: AX=0103h
--------N-690105-----------------------------
INT 69 - DECnet DOS CTERM - OPEN SESSION
        AX = 0105h
        DS:BX -> ASCIZ node name
        ES:DX -> buffer for session control block (see #03727 at INT 6A/AH=D0h)
Return: AX <= 0 on error
        AX > 0 session handle
SeeAlso: AX=0103h,AX=0106h,AX=010Ah
--------N-690106-----------------------------
INT 69 - DECnet DOS CTERM - CLOSE SESSION
        AX = 0106h
        DX = session handle
Return: AH = status
            00h good close
            other error code (see #03711)
SeeAlso: AX=0103h,AX=0105h
--------N-69010A-----------------------------
INT 69 - DECnet DOS CTERM - GET SESSION CONTROL BLOCK SIZE
        AX = 010Ah
Return: AX = length of session control block in bytes
SeeAlso: AX=0105h
--------N-69010B-----------------------------
INT 69 - DECnet DOS CTERM - GET DECnet SOCKET
        AX = 010Bh
        DX = session handle
Return: AX > 0  DECnet socket for the session
        AX = 0  no match for handle
--------N-69010F-----------------------------
INT 69 - DECnet DOS CTERM - DEINSTALL CTERM
        AX = 010Fh
Return: AH = status
            00h successful uninstall
            other error code (see #03711)
Note:   CTERM must have been the last TSR loaded in order to deinstall it
SeeAlso: AX=0100h
Index:  uninstall;DECnet DOS CTERM
--------N-690A-------------------------------
INT 69 - DECnet DOS 2.1+ - DATA LINK LAYER
        AH = 0Ah
        AL = function number (see #03712)
        ES:BX -> Datalink Communication Block (see #03714)
Return: AX = status (see #03713)
SeeAlso: INT 6D"DECnet"

(Table 03712)
Values for DECnet DOS Data Link Layer function:
 00h    initialize
 01h    open portal
 02h    close portal
 03h    enable multicast address
 04h    disable multicast address
 05h    transmit
 06h    request transmit buffer
 07h    deallocate transmit buffer
 08h    read channel status
 09h    read datalink portal list
 0Ah    read information about a datalink portal
 0Bh    read and/or clear counters
 0Ch    request to boot from a network server
 0Dh    enable Ethernet channel
 0Eh    disable Ethernet channel
 0Fh    start MOP/send a System ID message
 10h    stop MOP
 11h    get DECPARM
 12h    set DECPARM
 13h    external loopback

(Table 03713)
Values for DECnet DOS Data Link Layer status:
 00h    successful
 01h    hardware failed to initialize
 02h    channel state was not off (must be off to execute that command)
 03h    channel state is off (must be on to execute that command)
 04h    address not set
 05h    hardware missing
 06h    buffer too small
 07h    no more buffers available
 08h    no more resources available
 09h    promiscuous receiver active
 0Ah    non exclusive
 0Bh    unrecognized portal
 0Ch    protocol type in use
 0Dh    not a valid Multicast address
 0Eh    outstanding calls
 0Fh    hardware doesn't support receiving bad frames
 10h    none outstanding
 11h    no events
 12h    broken
 13h    buffer quota exceeded
 14h    already initialized
 15h    loopback failure
Index:  error codes;DECnet DOS|DECnet DOS;error codes

Format of Datalink Communication Block:
Offset  Size    Description     (Table 03714)
 00h    WORD    portal ID
 02h  6 BYTEs   source address
 08h  6 BYTEs   destination address
 0Eh    DWORD   buffer pointer
 12h    WORD    buffer length
 14h    WORD    operation
 16h    BYTE    pad flag (used on open)
                00h no pad
                01h pad
 17h    BYTE    mode flag (used on open)
                00h 802.3
                01h Ethernet
                02h promiscuous
 18h    DWORD   line status change function
 1Ch    DWORD   received data function
 20h    DWORD   transmitted data function
 24h    BYTE    maximum outstanding transmits/receives
 25h  2 BYTEs   protocol type
 27h    WORD    buffers lost
--------N-694001-----------------------------
INT 69 - 10NET v5.0 - SYSSVC.COM - ???
        AX = 4001h
Return: CF clear
        AX = 0000h
        ES:SI -> ???
InstallCheck:   test for the signature "SYSV" immediately before the interrupt
          handler
Range:  INT 60 to INT 7F, selected by configuration
SeeAlso: AX=4002h
Index:  installation check;10NET SYSSVC
--------N-694002-----------------------------
INT 69 - 10NET v5.0 - SYSSVC.COM - ???
        AX = 4002h
        ???
Return: ???
InstallCheck:   test for the signature "SYSV" immediately before the interrupt
          handler
Range:  INT 60 to INT 7F, selected by configuration
--------N-694101-----------------------------
INT 69 - 10NET v5.0 - SYSSVC.COM - ???
        AX = 4101h
Return: CF clear
        ES:SI -> ???
Range:  INT 60 to INT 7F, selected by configuration
SeeAlso: AX=4102h,AX=4103h,AX=4104h
--------N-694102-----------------------------
INT 69 - 10NET v5.0 - SYSSVC.COM - ???
        AX = 4102h
        ???
Return: ???
--------N-694103-----------------------------
INT 69 - 10NET v5.0 - SYSSVC.COM - ???
        AX = 4103h
        ???
Return: ???
--------N-694104-----------------------------
INT 69 - 10NET v5.0 - SYSSVC.COM - ???
        AX = 4104h
        ???
Return: ???
--------N-6942-------------------------------
INT 69 - 10NET v5.0 - SYSSVC.COM - ???
        AH = 42h
        AL = function (01h-14h)
        ???
Return: ???
Range:  INT 60 to INT 7F, selected by configuration
--------N-6943-------------------------------
INT 69 - 10NET v5.0 - SYSSVC.COM - ???
        AH = 43h
        AL = function (01h-05h)
        ???
Return: ???
--------N-6944-------------------------------
INT 69 - 10NET v5.0 - SYSSVC.COM - ???
        AH = 44h
        AL = function (01h-03h)
        ???
Return: ???
Range:  INT 60 to INT 7F, selected by configuration
--------N-6949-------------------------------
INT 69 - 10NET v5.0 - SYSSVC.COM - BUG
        AH = 49h
Note:   due to a fencepost error, this function branches to hyperspace
SeeAlso: AX=4001h,AH=FFh
--------G-696996-----------------------------
INT 69 - ISR.COM v1.00 - SPECIFY INTERRUPT HANDLER
        AX = 6996h
        DS:DX -> interrupt handler or 0000h:0000h to disable
Return: AX = 9669h
Program: ISR (Interrupt Service Reflector) is a TSR by Rich Bono which permits
          a program to provide hardware interrupt handlers even while being
          debugged with a debugger that swaps interrupt vectors during
          debugging.
Note:   the interrupt vector which is to be reflected is set at installation
          time and cannot be changed
--------N-69FF-------------------------------
INT 69 - 10NET v5.0 - SYSSVC.COM - SIGNAL SYSTEM ERROR
        AH = FFh
Return: never???
Desc:   displays "System Error" message and register dump, then halts system
InstallCheck:   test for the signature "SYSV" immediately before the interrupt
          handler
Range:  INT 60 to INT 7F, selected by configuration
SeeAlso: AX=4001h,AH=49h
--------U-6A---------------------------------
INT 6A - OPTHELP.COM
Program: OPTHELP is an optionally-resident help system for SLR Systems's OPTASM
          assembler
Range:  INT 60h to INT 7Fh, selected by configuration
--------N-6A---------------------------------
INT 6A - DECnet DOS - LOCAL AREA TRANSPORT PROGRAM - INSTALLATION CHECK
InstallCheck:   test for a signature area immediately preceding the interrupt
          handler (see #03715)
SeeAlso: AH=01h/DH=FFh,INT 6B"DECnet",INT 6D"DECnet"
Index:  installation check;DECnet DOS Local Area Transport

Format of DECnet DOS signature area:
Offset  Size    Description     (Table 03715)
 -5     BYTE    major version number
 -4     BYTE    minor version number
 -3   3 BYTEs   signature (ASCII "LAT")
--------h-6A---------------------------------
INT 6A C - HP Vectra AT - IRQ18 - RESERVED HARDWARE INTERRUPT
SeeAlso: INT 0A"IRQ2",INT 69"HP Vectra",INT 6B"HP Vectra"
--------N-6A0000-----------------------------
INT 6A U - Super-TCP DOS TSR Kernel v3.57 - INSTALLATION CHECK
        AX = 0000h
Return: AX = 4357h ('CW')
Program: Super-TCP is a TCP/IP protocol stack by Frontier Technologies Corp.
Note:   an alternate installation check is to test for the ASCIZ signature
          "FTC Super-TCP" three bytes past the interrupt handler
SeeAlso: AX=0001h,AX=0002h,AX=000Fh,AX=0010h,INT 21/AH=3Fh"BW-TCP"
SeeAlso: INT 61"FTP Software",INT 62/AH=00h"ETHDEV"
--------N-6A0001-----------------------------
INT 6A U - Super-TCP DOS TSR Kernel v3.57 - ???
        AX = 0001h
        BH = function number
            01h ???
                DS:SI -> ??? 24-byte record1 (see #03717)
                ES:DI -> buffer containing ???
            02h ???
                DS:SI -> ??? 18-byte record2 (see #03718)
                ES:DI -> buffer containing ???
            04h ???
                BL = subfunction
                    01h
                        DS:SI -> ??? 28-byte record3 (see #03719)
                        ES:DI -> buffer containing ???
                    02h
                        DS:SI -> ??? 28-byte record3 (see #03719)
                        ES:DI -> buffer containing ???
                    03h
                        DS:SI -> ??? 28-byte record3 (see #03719)
                    else Return: AX = 0005h
            05h ???
                DS:SI -> ??? 20-byte record4 (see #03720)
                ES:DI -> buffer containing ???
            06h ???
                BL = subfunction
                    01h
                        DS:SI -> ??? 40-byte record5 (see #03721)
                    02h
                        DS:SI -> ??? 20-byte record6 (see #03722)
                        ES:DI -> ???
                    03h
                        DS:SI -> ??? 20-byte record6 (see #03722)
                    04h
                        DS:SI -> ??? 46-byte record7 (see #03723)
                    else Return: AX = 0005h
            11h ???
                DS:SI -> ??? 28-byte record8 (see #03724)
                ES:DI -> ???
Return: AX = function status (see #03716)
SeeAlso: AX=0000h

(Table 03716)
Values for Super-TCP function status:
 0000h  successful
 0005h  unsupported function
 000Ah  out of memory

Format of record1:
Offset  Size    Description     (Table 03717)
 00h  4 BYTEs   ???
 04h    WORD    size of ES:DI buffer
 06h 18 BYTEs   ???

Format of record2:
Offset  Size    Description     (Table 03718)
 00h  4 BYTEs   ???
 04h    WORD    size of ES:DI buffer
 06h 12 BYTEs   ???

Format of record3:
Offset  Size    Description     (Table 03719)
 00h  2 BYTEs   ???
 02h    WORD    ???
 04h    WORD    size of ES:DI buffer
 06h    WORD    ???
 08h    WORD    operation number (for function 0401h)
 0Ah    DWORD   -> ???
 0Eh    WORD    (ret) ???
 10h 12 BYTEs   ???

Format of record4:
Offset  Size    Description     (Table 03720)
 00h  4 BYTEs   ???
 04h    WORD    size of ES:DI buffer
 06h 14 BYTEs   ???

Format of record5:
Offset  Size    Description     (Table 03721)
 00h    BYTE    operation??? (00h-07h)
 01h    BYTE    ???
 02h    WORD    (ret) ???
 04h    DWORD   -> ???
 08h  4 BYTEs   ???
 0Ch    DWORD   -> ??? or 0000h:0000h
 10h 16 BYTEs   ???
 20h    DWORD   ???
 24h  4 BYTEs   ???

Format of record6:
Offset  Size    Description     (Table 03722)
 00h  4 BYTEs   ???
 04h    WORD    size of ES:DI buffer
 06h 14 BYTEs   ???

Format of record7:
Offset  Size    Description     (Table 03723)
 00h    WORD    ???
 02h    WORD    ???
 04h    WORD    ???
 06h 40 BYTEs   ???

Format of record8:
Offset  Size    Description     (Table 03724)
 00h  4 BYTEs   ???
 04h    WORD    size of ES:DI buffer
 06h  6 BYTEs   ???
 0Ch    WORD    (ret) ???
 0Eh    WORD    operation??? (01h-03h)
 10h 12 BYTEs   ???
--------N-6A0002-----------------------------
INT 6A U - Super-TCP DOS TSR Kernel v3.57 - ???
        AX = 0002h
        BX = ??? (zero/nonzero)
        CX = ??? identifier (see AX=0004h)
        DS:SI -> 40-byte buffer for ??? or 0000h:0000h
        ES:DI -> buffer for ??? or 0000h:0000h
Return: AX = 0000h (successful) ???
        BL = ???
        BH = ???
        CX = ???
        DX = ???
--------N-6A0003-----------------------------
INT 6A U - Super-TCP DOS TSR Kernel v3.57 - GET ??? DATA AREA
        AX = 0003h
Return: CX:DX -> data area (see #03725)

Format of Super-TCP data area:
Offset  Size    Description     (Table 03725)
 00h  2 BYTEs   ???
 02h    DWORD   original INT 6A vector
 06h  2 BYTEs   ???
 08h 96 BYTEs   array of 16 6-byte ???
 68h    WORD    number of elements of above array in use
 6Ah    WORD    ???
        ???
--------N-6A0004-----------------------------
INT 6A U - Super-TCP DOS TSR Kernel v3.57 - ALLOCATE ???
        AX = 0004h
        CX = size in ???
Return: AX = 0000h (successful)
        CX = DX = ???
SeeAlso: AX=0005h,AX=000Fh
--------N-6A0005-----------------------------
INT 6A U - Super-TCP DOS TSR Kernel v3.57 - FREE/CLOSE ???
        AX = 0005h
        CX = ??? identifier (from AX=0004h)
Return: AX = status (0000h successful, FFFFh failed)
SeeAlso: AX=0004h,AX=000Fh
--------N-6A000F-----------------------------
INT 6A U - Super-TCP DOS TSR Kernel v3.57 - FREE/CLOSE ALL ???
        AX = 000Fh
Return: AX = 0000h (successful)
SeeAlso: AX=0000h,AX=0004h,AX=0005h
--------N-6A0010-----------------------------
INT 6A U - Super-TCP DOS TSR Kernel v3.57 - UNINSTALL
        AX = 0010h
Return: AX = status
            0000h successful
            0002h can't uninstall, interrupt vector hooked by another program
Program: Super-TCP is a TCP/IP protocol stack by Frontier Technologies Corp.
Note:   if AX is not one of the values listed here on entry, Super-TCP
          returns AX=FFFEh
SeeAlso: AX=0000h
--------N-6A01--DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - SEND BYTE
        AH = 01h
        DH = FFh
        AL = character
        DL = handle
Return: AH >= 80h on error
SeeAlso: AH=02h
--------N-6A02--DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - READ BYTE
        AH = 02h
        DH = FFh
        DL = handle
Return: AH < 80h if successful
            AL = character
        AH >= 80h on error
SeeAlso: AH=01h
--------N-6A03--DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - STATUS
        AH = 03h
        DH = FFh
        DL = handle
Return: AH = status flags (see #03726)

Bitfields for DECnet DOS LAT status flags:
Bit(s)  Description     (Table 03726)
 5      transmit buffer empty
 3      session in start state
 2      session not active
 1      unable to queue transmit data
 0      receive data available
--------N-6AD0--DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - OPEN SESSION
        AH = D0h
        DH = FFh
        AL = password flag
            FFh no password
            0Fh password at ES:DI
        ES:BX -> LAT session control block (see #03727)
        ES:DI -> 16-byte blank-padded password (optional)
Return: AH = 00h success
            DL = handle
SeeAlso: AX=D000h

Format of LAT Session Control Block:
Offset  Size    Description     (Table 03727)
 00h 18 BYTEs   service name
 12h 18 BYTEs   node name (future use)
 24h 18 BYTEs   port name (future use)
 36h    DWORD   -> session stopped post routine
 3Ah    DWORD   -> service table overflow post routine
 3Eh    DWORD   -> transmit post routine
 42h    DWORD   -> receive post routine
 46h    WORD    session status
                04h circuit failure
                08h stop slot received
---LAT v???---
 48h    WORD    slot state (LAT driver use)
 4Ah    WORD    local credits (LAT driver use)
 4Ch    DWORD   -> VCB (LAT driver use)
 50h    WORD    backward slot (LAT driver use)
 52h    WORD    forward slot (LAT driver use)
 54h    WORD    remote slot ID (LAT driver use)
 56h    WORD    local slot ID (LAT driver use)
 58h    WORD    slot byte count (LAT driver use)
 5Ah    BYTE    remote credits (LAT driver use)
 5Bh 255 BYTEs  transmitted data slot
15Ah    BYTE    number of receive data slots (4 recommended)
15Bh    BYTE    number of occupied slots
15Ch    BYTE    index of next receive slot to use
15Dh    BYTE    index of current receive slot
15Eh    WORD    pointer to first received character
160h  N WORDs   pointers to receive slots (buffers); each is 259 bytes
     259N BYTEs buffers
Note:   set post routines to 0000h:0000h if polled operation will be used
---LAT v4.1.17---
 48h    WORD    session state (LAT driver use)
 4Ah    BYTE    local credits (LAT driver use)
 4Bh    DWORD   -> VCB (LAT driver use)
 4Fh    WORD    backward slot (LAT driver use)
 51h    WORD    forward slot (LAT driver use)
 53h    BYTE    remote slot ID (LAT driver use)
 54h    BYTE    local slot ID (LAT driver use)
 55h    BYTE    slot byte count (LAT driver use)
 56h    BYTE    remote credits (LAT driver use)
 57h 255 BYTEs  transmitted data slot
156h    BYTE    number of receive data slots (4 recommended)
157h    BYTE    number of occupied slots
158h    BYTE    index of next receive slot to use
159h    BYTE    index of current receive slot
15Ah    WORD    pointer to first received character
15Ch  N WORDs   pointers to receive slots (buffers); each is 259 bytes
     259N BYTEs buffers
Note:   set post routines to 0000h:0000h if polled operation will be used
--------N-6AD000DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - CLOSE SESSION
        AX = D000h
        DH = FFh
        DL = handle
Return: AX = status (see #03728)
SeeAlso: AH=D0h

(Table 03728)
Values for DECnet DOS LAT function status:
 0000h  successful
 0001h  no such session
 0002h  session not running, try again later
--------N-6AD100DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - SEND BREAK
        AX = D100h
        DH = FFh
        DL = handle
Return: AX = 0000h if successful
        AH bit 7 set if unable to send break
--------N-6AD300DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - RESET LAT COUNTERS
        AX = D300h
        DH = FFh
SeeAlso: AX=D400h
--------N-6AD400DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - COPY LAT COUNTERS
        AX = D400h
        DH = FFh
        CX = buffer size
        ES:BX -> buffer for LAT counters
Return: AX = status
            0000h counters copied into buffer
            FFFFh buffer too small
SeeAlso: AX=D300h
--------N-6AD500DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - GET NEXT LAT SERVICE NAME
        AX = D500h
        DH = FFh
        ES:BX -> 17-byte buffer for name
Return: AH = 00h if successful
           ES:BX buffer filled
        AX = FFFFh if end of table or no name available
Notes:  use this function to get the names of the hosts on the network
        successive calls are necessary to get all names
SeeAlso: AX=D600h/DH=FFh
--------N-6AD600DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - LAT SERVICE TABLE RESET
        AX = D600h
        DH = FFh
Return: AX = number of service table entries
        BX = status
            0000h service table has not overflowed
            FFFFh service table has overflowed
SeeAlso: AX=D500h
--------!---Section--------------------------
Interrupt List, part 17 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------N-6B---------------------------------
INT 6B - DECnet DOS - PORT DRIVER
InstallCheck:   test for a signature area (see #03729) immediately preceding
          the interrupt handler
SeeAlso: INT 6A"DECnet",INT 6C"DECnet"
Index:  installation check;DECnet DOS Port Driver

Format of DECnet DOS signature area:
Offset  Size    Description     (Table 03729)
 -5     BYTE    major version number
 -4     BYTE    minor version number
 -3   3 BYTEs   signature (ASCII "PDV")
--------v-6B---------------------------------
INT 6B - VIRUS - "Saddam" - ORIGINAL INT 21h VECTOR
SeeAlso: INT 21/AX=FFFFh,INT 61"VIRUS",INT 70"VIRUS"
--------h-6B---------------------------------
INT 6B C - HP Vectra AT - IRQ19 - RESERVED HARDWARE INTERRUPT
SeeAlso: INT 0B"IRQ3",INT 6A"HP Vectra",INT 6C"HP Vectra"
--------S-6B0000-----------------------------
INT 6B - Novell NASI/NACS, Ungermann-Bass Net One SERIAL I/O - BUFFERED WRITE
        AX = 0000h
        CX = length
        ES:BX -> buffer
Return: CX = number of bytes written
Program: NASI is Novell's NetWare Asynchronous Services Interface (purchased
          from Network Products Corp, who call it NCSI) which runs on
          workstations; NACS is the NetWare Asynchronous Communications
          Services module which runs on servers
InstallCheck:   test for the signature string "NCSI" three bytes past the
          interrupt handler; see also AH=02h.
        As of version 3.0, Novell's NASI can be distinguished from NPC's
          NCSI by the presence of an 'A' immediately following the signature
Notes:  this function is also supported by TelAPI, NPC NCSI, and Connection
          Manager CLIENT.EXE; for TelAPI, nonzero values in AL specify a
          connection ID
        Connection Manager returns CF set/AL=FFh if called while an INT 6B
          call is already in progress
SeeAlso: AX=0100h,AH=18h,INT 14/AH=19h,INT 14/AH=E3h
--------S-6B0100-----------------------------
INT 6B - Novell NASI/NACS, Ungermann-Bass Net One SERIAL I/O - BUFFERED READ
        AX = 0100h
        CX = length of buffer
        ES:BX -> buffer
Return: CX = number of bytes read
Note:   also supported by TelAPI and NPC NCSI; for TelAPI, nonzero values in
          AL specify a connection ID
SeeAlso: AX=0000h,AH=19h,INT 14/AH=18h,INT 14/AH=E2h,INT 14/AX=FF02h
--------S-6B02-------------------------------
INT 6B - Novell NASI/NACS, Ungermann-Bass Net One SERIAL I/O - INSTALL CHECK
        AH = 02h
        AL nonzero
Return: AL = 00h if present and OK
Note:   this function is also supported by TelAPI and NPC NCSI
SeeAlso: AX=0700h
--------S-6B0600-----------------------------
INT 6B - Novell NASI/NACS, Ungermann-Bass Net One SERIAL I/O - CONTROL
        AX = 0600h
        CX = command
            02h send break
            04h disconnect
            06h hold
Return: CF clear if successful
            AL = 00h
        CF set on error
            AX < 0
Note:   this function is also supported by TelAPI and NPC NCSI
--------S-6B0700-----------------------------
INT 6B - Novell NASI/NACS, Ungermann-Bass Net One SERIAL I/O - GET STATUS
        AX = 0700h
Return: CH <> 00h if connection active
Notes:  this function is also supported by TelAPI and NPC NCSI
        Novell TelAPI returns CX=FF01h and CF clear
SeeAlso: AH=02h,AH=10h
--------N-6B08-------------------------------
INT 6B - TelAPI - CHECK FOR BREAK SIGNAL
        AH = 08h
        AL = circuit number
Return: CF clear if no breaks
            AL = 00h
            CX = 0000h
        CF set if one or more breaks received
Note:   this function also clears ??? flag
SeeAlso: INT 14/AX=FF00h
--------S-6B10-------------------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - GET STATUS
        AH = 10h
        AL = connection ID (Novell TELAPI.EXE)
        CX = ???
        ES:BX -> buffer for status (see #03730)
Return: CF clear if successful
            CL = ???
            CH = ???
        CF set on error
        ???
Notes:  this function is also supported by TelAPI
        when shelled out to an external protocol from Novell NASI, the circuit
          whose status indicates that it is connected is the currently active
          circuit
SeeAlso: AX=0700h,AH=12h,AH=1Fh

Format of NASI status:
Offset  Size    Description     (Table 03730)
 00h    BYTE    number of allocated virtual circuits
 01h    BYTE    reserved
 02h  9 BYTEs   states of emulated circuits 0-8
                00h idle
                01h attached Telnet session, in command state
                02h attached Telnet session, connected with host
                03h-06h ??? (not returned by TelAPI)
Note:   this description is derived from the Novell TelAPI emulation of NASI
--------S-6B11--DX0001-----------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - ALLOCATE A VIRTUAL CIRCUIT
        AH = 11h
        DX = 0001h
        AL = 00h
        ES:BX -> service name string (8 characters, blank-padded)
Return: CF clear if successful
            AL = virtual circuit number allocated (01h for Novell TELAPI.EXE)
            CL = ??? (01h for Novell TELAPI.EXE)
            CH = ??? (01h for Novell TELAPI.EXE)
        CF set on error
            ???
Note:   this function is also supported by TelAPI
SeeAlso: AH=12h,AH=15h,AH=16h,AH=17h,AH=18h
--------S-6B12-------------------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - VIRTUAL CIRCUIT STATUS
        AH = 12h
        AL = virtual circuit number (0-8)
Return: CF clear if successful
            AL = virtual circuit number
            CL = virtual circuit's state
                00h idle
                01h Telnet session, in command state
                02h Telnet session, connected to host
                03h-06h ??? (not returned by TelAPI)
        CF set on error
            AL = error code
                E2h invalid virtual circuit number
                E4h specified virtual circuit not allocated
Note:   this function is also supported by TelAPI
SeeAlso: AH=10h,AH=15h,AH=1Ah,AH=1Bh,AH=1Fh
--------S-6B13-------------------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - SET/RETRIEVE REQUEST/REPLY SERVICE NAME
        AH = 13h
        AL = virtual circuit number
        CL = direction (00h get, nonzero set)
        ES:BX -> buffer for/containing service name
Return: ???
Note:   this function is also supported by TelAPI
SeeAlso: AH=14h,AH=15h
--------S-6B14-------------------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - SET/RETRIEVE SERVICE ADDRESS
        AH = 14h
        AL = virtual circuit number
        ES:BX -> buffer for/containing service address
Return: ???
Note:   this function is also supported by TelAPI, which only supports
          retrieving the address
SeeAlso: AH=13h,AH=15h,AH=21h
--------S-6B15-------------------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - SET/RETRIEVE VIRTUAL CIRCUIT CONFIG
        AH = 15h
        AL = virtual circuit number
        CL = direction (00h get, nonzero set)
        ES:BX -> buffer for/containing virtual circuit config (see #03731)
Return: ES:BX buffer filled
Note:   this function is also supported by TelAPI
SeeAlso: AH=13h"NCSI",AH=14h"NCSI"

Format of virtual circuit configuration:
Offset  Size    Description     (Table 03731)
 00h    WORD    buffer length
 02h    WORD    port ID
 04h    WORD    receive rate
 06h    WORD    receive word length
 08h    WORD    receive stop bits
 0Ah    WORD    receive parity
 0Ch    WORD    transmit rate
 0Eh    WORD    transmit word length
 10h    WORD    transmit stop bits
 12h    WORD    transmit parity
 14h    WORD    DTR
 16h    WORD    RTS
--------S-6B16-------------------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - LOG AND/OR INITIALIZE VIRTUAL CIRCUIT
        AH = 16h
        AL = virtual circuit number
        CL = ??? switch (00h, ???)
Return: CF clear if successful
            AL = virtual circuit number
        CF set on error
            ???
Note:   this function is also supported by TelAPI, which always returns CF
          clear and AL=00h
SeeAlso: AH=11h,AH=12h,AH=17h
--------S-6B17-------------------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - DISCONNECT A VIRTUAL CIRCUIT
        AH = 17h
        AL = virtual circuit number
Return: CF clear if successful
        CF set on error
        ???
Note:   this function is also supported by TelAPI, which always returns CF
          clear and AL=00h
SeeAlso: AH=11h,AH=16h
--------S-6B18-------------------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - WRITE DATA ON A VIRTUAL CIRCUIT
        AH = 18h
        AL = virtual circuit number
        CX = number of characters to send
        ES:BX -> buffer containing characters to be sent
Return: CF clear if successful
        CF set on error
        ???
Note:   this function is also supported by TelAPI, which always returns CF
          clear and AL=30h
SeeAlso: AX=0000h,AH=12h,AH=19h
--------S-6B19-------------------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - READ DATA ON A VIRTUAL CIRCUIT
        AH = 19h
        AL = virtual circuit number
        CX = number of characters to read
        ES:BX -> buffer for received characters
Return: CX = 0000h if failed
        CX = nonzero (possibly number of characters received) if successful
Note:   this function is also supported by TelAPI
SeeAlso: AX=0100h,AH=12h,AH=18h
--------S-6B1A-------------------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - RECEIVE STATUS
        AH = 1Ah
        ???
Return: ???
SeeAlso: AH=12h,AH=1Bh
--------S-6B1B-------------------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - TRANSMIT STATUS
        AH = 1Bh
        ???
Return: ???
SeeAlso: AH=12h,AH=1Ah
--------S-6B1C-------------------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - CLEAR RECEIVE BUFFER
        AH = 1Ch
        AL = circuit number
Return: nothing
SeeAlso: AH=1Dh"NCSI",AH=1Eh"NCSI"
--------S-6B1D-------------------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - TRANSMIT BUFFER CONTROL
        AH = 1Dh
        ???
Return: ???
SeeAlso: AH=1Ch,AH=1Eh
--------S-6B1E-------------------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - ISSUE CONTROL REQUEST
        AH = 1Eh
        ???
Return: ???
SeeAlso: AH=1Ch,AH=1Dh
--------S-6B1F-------------------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - EXTERNAL STATUS
        AH = 1Fh
        ???
Return: ???
SeeAlso: AH=10h,AH=12h
--------S-6B20-------------------------------
INT 6B - Connection Manager CLIENT.EXE - ???
        AH = 20h
        ???
Return: ???
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
          serial ports over an IPX or NetBIOS-based network
Note:   CLIENT.EXE returns CF set/AL=F9h if AH is not 00h to 21h on entry
--------S-6B21-------------------------------
INT 6B - NPC NCSI EXTENDED SERIAL I/O - QUERY NAME SERVICE
        AH = 21h
        AL = virtual circuit number
        CL = ??? (00h or 01h)
        ES:BX -> buffer for service name structure (see #03732)
Return: CF clear if successful
            ES:BX buffer filled
        CF set on error
Notes:  a program should call this function after allocating a virtual circuit
          and check that the general name matches the requested service
        prior to version 3.0, Novell's NASI returned the first available port;
          v3.0+ returns the first port found--check the returned status to
          determine whether the port is available
SeeAlso: AH=14h"NCSI"

Format of NCSI service name structure:
Offset  Size    Description     (Table 03732)
 00h    WORD    buffer length
 02h  8 BYTEs   service name
 0Ah  8 BYTEs   general name
 12h  8 BYTEs   specific name
 1Ah  4 BYTEs   ???
---Novell NASI v3.0+ ---
 1Eh    BYTE    port number
 1Fh    BYTE    port status
                00h idle (available)
                01h allocated (available)
                02h connected
                03h on hold
----------6B6B-------------------------------
INT 6B - Tandy SCHOOLMATE PLUS - API
        AH = 6Bh
        AL = E0h to FFh
Note:   details not yet available
----------6C---------------------------------
INT 6C - system resume vector (CONVERTIBLE)
----------6C---------------------------------
INT 6C - DOS 3.2 Realtime Clock update
--------N-6C---------------------------------
INT 6C - DECnet DOS network scheduler
InstallCheck:   test for a signature area immediately preceding the interrupt
          handler (see #03733)
Note:   this function is also supported by DEC Pathworks for DOS
SeeAlso: INT 6B"DECnet",INT 6D"DECnet",INT 6E"DECnet"
Index:  installation check;DECnet DOS scheduler

Format of DECnet DOS signature area:
Offset  Size    Description     (Table 03733)
 -5     BYTE    major version number
 -4     BYTE    minor version number
 -3   3 BYTEs   signature (ASCII "SCH")
--------h-6C---------------------------------
INT 6C C - HP Vectra AT - IRQ20 - HP-HIL CONTROLLER INTERRUPT
SeeAlso: INT 0C"IRQ4",INT 6B"HP Vectra",INT 6D"HP Vectra"
--------V-6D---------------------------------
INT 6D - VIDEO - many VGA - VIDEO BIOS ENTRY POINT
Desc:   points at the original INT 10 entry point set up by the VGA BIOS
Notes:  used by IBM, ATI VGA Wonder, Paradise, Video7, and NCR, and many others
        the Diamond Stealth64 BIOS uses this vector to store the INT 42 vector
           of the inactive video (see INT 10/AH=12h/BL=35h)
SeeAlso: INT 10/AH=00h,INT 10/AH=0Eh,INT 10/AH=12h/BL=10h
--------V-6D---------------------------------
INT 6D - Trident SVGA - VIDEO BIOS HANDLER
Note:   the BIOS INT 10 handler on various Trident VGA cards consists merely
          of a call to INT 6D followed by an IRET.
--------N-6D---------------------------------
INT 6D - DECnet DOS (before 2.1) - DATA LINK LAYER PROGRAM
        AH = function
        ???
Return: ???
InstallCheck:   test for a signature area immediately preceding the interrupt
          handler (see #03734)
SeeAlso: INT 69/AH=0Ah,INT 6C"DECnet",INT 6E"DECnet"
Index:  installation check;DECnet DOS Data Link Layer

Format of DECnet DOS signature area:
Offset  Size    Description     (Table 03734)
 -5     BYTE    major version number
 -4     BYTE    minor version number
 -3   3 BYTEs   signature (ASCII "DLL")
--------h-6D---------------------------------
INT 6D C - HP Vectra AT - IRQ21 - RESERVED HARDWARE INTERRUPT
SeeAlso: INT 0D"IRQ5",INT 6C"HP Vectra",INT 6E"HP Vectra"
--------V-6DBD60-----------------------------
INT 6D U - Matrox Multiple Monitor Support v1.0 - ???
        AX = BD60h
        DS:SI -> buffer containing ??? (see #03735)
        ???
Return: AX = 00BDh if function executed
           ???:SI -> 22-byte buffer (inside TSR) filled with ??? (see #03735)
        AX unchanged if function disabled
Note:   this function is a NOP if AX=BD6Fh/BL=01h was called
SeeAlso: AX=BD61h,AX=BD6Fh,AX=BDFFh

Format of Matrox ??? buffer:
Offset  Size    Description     (Table 03735)
 00h  4 BYTEs   ???
 04h    WORD    video mode width in pixels
 06h    WORD    video mode height in pixels
 08h    BYTE    ???
 09h    BYTE    ???
 0Ah    BYTE    ???
 0Bh    BYTE    flags
                bit 1: ???
                bit 4: ??? (corresponds to bit 14 for AX=BD61h)
                bit 5: ??? (corresponds to bit 15 for AX=BD61h)
 0Ch    DWORD   -> ??? buffer
 10h    WORD    ???
                bit 4: ??? (corresponds to bit 14 for AX=BD61h)
                bit 5: ??? (corresponds to bit 15 for AX=BD61h)
 12h  4 BYTEs   ???
SeeAlso: #03736
--------V-6DBD61-----------------------------
INT 6D U - Matrox Multiple Monitor Support v1.0 - GET VIDEO MODE INFORMATION
        AX = BD61h
        BX = width in pixels (bits 13-0)
            bit 14: ???
            bit 15: ???
        CX = height in pixels
Return: AL = BDh if function supported
            AH = status
                00h successful
                01h failed (resolution/flags not supported)
            CX:BX -> video mode data structure (see #03736)
                  (first word is FFFFh if unsupported resolution)
            EAX high word cleared
SeeAlso: AX=BD60h,AX=BD6Fh,AX=BDFFh

Format of Matrox video mode information (VCE structure):
Offset  Size    Description     (Table 03736)
 00h    WORD    width in pixels
 02h    WORD    height in pixels
 04h    WORD    ???
 06h    DWORD   dot clock frequency
 0Ah 25 BYTEs   ???
SeeAlso: #03735
--------V-6DBD6F-----------------------------
INT 6D U - Matrox Multiple Monitor Support v1.0 - INSTALLATION CHECK
        AX = BD6Fh
        BL = subfunction
            00h installation check
            01h disable TSR
            02h enable TSR (see AX=BD60h)
Return: AX = 00BDh if installed
SeeAlso: AX=BD60h,AX=BD61h,AX=BDFFh
--------V-6DBDFF-----------------------------
INT 6D U - Matrox Multiple Monitor Support v1.0 - UNHOOK INTERRUPT (UNINSTALL)
        AX = BDFFh
Return: AX = 00BDh if supported
Note:   this function revectors INT 6D without checking that it points at the
          TSR, and does not release the memory occupied by the TSR
SeeAlso: AX=BD60h,AX=BD61h,AX=BD6Fh
--------N-6E---------------------------------
INT 6E - DECnet DOS - DECnet NETWORK PROCESS API
InstallCheck:   test for the signature/data area (see #03737) immediately prior
          to the interrupt handler
Note:   this is the main DECnet DOS access, and is described in Digital manual
          AA-EB46B-TV ("DECnet-DOS Programmer's Reference Manual")
Index:  installation check;DECnet DOS

Format of DECnet DOS signature area:
Offset  Size    Description     (Table 03737)
 -5     BYTE    major version number
 -4     BYTE    minor version number
 -3   3 BYTEs   signature (ASCII "DNP")
--------h-6E---------------------------------
INT 6E C - HP Vectra AT - IRQ22 - RESERVED HARDWARE INTERRUPT
SeeAlso: INT 0E"IRQ6",INT 6D"HP Vectra",INT 6F/AH=00h"HP Vectra"
--------N-6F---------------------------------
INT 6F - Novell NetWare - PCOX API (3270 PC terminal interface)
        AX = function
            0000h enter terminal mode
                Return: AX = status
                            0000h no action requested
                            0001h screen save
            0001h reset interface and set configuration parameters
                DX = bitfields
                    bits 2-0: model number
                    bits 4-3: I/O address
                    bits 6-5: DMA channel
                Return: nothing
            0002h set display parameters
                DX = bitfields
                    bits 1-0: OIA mode
                    bits 4-2: monitor support
                Return: nothing
            0003h read status
                Return: AX = status word (see #03738)
            0004h read cursor position
                Return: AX = cursor position
            0005h get character from device buffer
                DX = cursor position
                Return: AH = type (00h data, 01h attribute)
                        AL = data or attribute character
            0006h send character
                DH = type (00h ASCII, 01h extended code)
                DL = ASCII character or extended code
                Return: nothing
            0007h set timeout
                DX = timeout in seconds
                Return: nothing
            0008h wait for location to be modified
                DX = cursor position
                Return: AX = status (0000h modified, nonzero timeout)
            0009h NOP
            000Ah restore display
                Return: nothing
            000Bh update device buffer
                Return: AX = cursor positoin
            000Ch write string to add information area
                DS:DX -> string
                Return: nothing
            000Dh maintenance operations
                DX = maintenance operation code
                Return: AX = operation status
            000Eh get control program version
                Return: AH = release number (major version)
                        AL = level number (minor version)
            000Fh get microcode version
                Return: AH = release number (major version)
                        AL = level number (minor version)
            0010h save or display graphics
                BX = length of data buffer
                CX = subfunction request code
                DS:DX -> data buffer
                Return: AX = return code
                        CX = length of PIF data
            0011h perform structured field operation
                CX = request number
                DS:DX -> parameter list
                Return: AX = status word (see #03738)
                        CX = error number
            0012h set cursor position for direct write buffer
                DX = new cursor position
                Return: AX = status word (see #03738)
            0013h write direct to buffer
                DL = character to be written
                DH = translation option
                Return: AX = status word (see #03738)
            0014h write direct to buffer without echo
                DL = character to be written
                DH = translation option
                Return: AX = status word (see #03738)
            0015h set direct write string length
                DX = string value
                Return: nothing
            0016h write string direct to buffer
                DS:DX -> string
                Return: AX = status word (see #03738)
            0017h write string direct to buffer, untranslated
                DS:DX -> string
                Return: AX = status word (see #03738)
            0018h get direct-write cursor position
                Return: AX = cursor position
            0019h convert row/column to cursor position
                DH = display row (1-43)
                DL = display column (1-132)
                Return: AX = cursor position
            001Ah convert cursor position to row/column
                DX = cursor position
                Return: AH = display row
                        AL = display column
            001Bh find next field
                DX = initial cursor position
                Return: AX = field cursor position
            001Ch find previous field
                DX = initial cursor position
                Return: AX = field cursor position
            001Dh find next unprotected field
                DX = initial cursor position
                Return: AX = field cursor position
            001Eh find previous unprotected field
                DX = initial cursor position
                Return: AX = field cursor position
            001Fh find next protected field
                DX = initial cursor position
                Return: AX = field cursor position
            0020h find previous protected field
                DX = initial cursor position
                Return: AX = field cursor position
            0021h masked search forward
                DH = mask
                DL = search pattern
                Return: AX = cursor position or 0000h
            0022h masked search backward
                DH = mask
                DL = search pattern
                Return: AX = cursor position or 0FFFh
            0023h find field length
                DX = cursor position
                Return: AX = field length
            0024h read field
                DS:DX -> buffer for field contents
                Return: AX = status word (see #03738)
            0025h read screen
                DS:DX -> buffer for screen contents
                Return: AX = status word (see #03738)
            0026h read buffer untranslated
                DX = cursor position
                Return: AX = buffer code
                        CX:BX -> 3278/79 device buffer image
            0027h enable/disable keyboard
                DL = new state of keyboard breaks (00h enabled, 01h disabled)
                Return: nothing
            0028h select host session
                DL = session short name
                Return: AX = session information
            0029h retrieve host session name
                AX = short name (DFT) or 0000h (not available, CUT mode)
            002Ah get current device buffer size
                Return: AX = device buffer size
                        CX = segment of EAB
            002Bh arm modified location trigger
                DX = cursor position
                Return: AX = status (0000h not available, 0001h successful)

Bitfields for PCOX status word:
Bit(s)  Description     (Table 03738)
 0,1    cursor type
 2      cursor inhibited
 3      display inhibited
 4      feature step inhibited
 5      480-character format code
 6,7    unused
 8-10   model number (2-5)
 11     unit has been reset by controller (cleared after status returned)
 12     buffer has been written into (cleared after status returned)
 13     alarm has been sounded (cleared after status returned)
 14-15  monitor type (01 mono, 10 color, 11 hybrid)
--------N-6F00-------------------------------
INT 6F - 10NET - LOGIN
        AH = 00h
        DS:DX -> login record (see #03739)
Return: CL = security level
        AX = status (see #03740)
SeeAlso: AH=01h,AH=80h,INT 21/AX=4402h"10MEMMGR"

Format of 10NET login record:
Offset  Size    Description     (Table 03739)
 00h  8 BYTEs   user name
 08h  8 BYTEs   password
 10h 12 BYTEs   name of SuperStation

(Table 03740)
Values for 10NET status:
 0000h  successful
 01FFh  "RTO_NERR" transmit interrupt lost (time out on response)
 02FFh  "NET_NERR" network (hardware) error
 03FFh  "PAS_NERR" invalid password
 04FFh  "LRN_NERR" local resource not available
 05FFh  "SRN_NERR" server resource not available
 06FFh  "LNM_NERR" already logged in under different name
 07FFh  "LSF_NERR" login security failure (node)
 08FFh  "NLI_NERR" not logged in
 09FFh  "DIVZ_NERR" position calc error
 0AFFh  "NT1_NERR" receive subfunction not = send subfunction (i.e. read,write)
 0BFFh  "RFNC_NERR" request function not in range
 0CFFh  "NSFH_NERR" no more server file handle entries left
 0DFFh  "NFTAB_NERR" no more shared file table entries left
 0EFFh  "NUFH_NERR" no more user file handle entries left
 0FFFh  "CHAT_NERR" chat permit not on
 10FFh  "NSRV_NERR" not a server on request
 11FFh  "NOBD_NERR" no transporter board error
 12FFh  "STO_NERR" time out on send
 13FFh  "INF_NERR" item not found (spool item not on queue)
 14FFh  "DACS_NERR" DOS access incompatible
 15FFh  "RLOCK_NERR" record already locked
 16FFh  "IVP_NERR" invalid parameter
 17FFh  "RLTO_NERR" record lock time out error
 18FFh  "CSPL_NERR" currently spooling to named device
 19FFh  "DRP_NERR" dropped receive message (throttle)
 1AFFh  "SOPV_NERR" open sharing violation
 1BFFh  "NTUF_NERR" no more tuf entries left
 1CFFh  "NOWN_NERR" not file owner on open
 1DFFh  "RSEC_NERR" read security not passed
 1EFFh  "WSEC_NERR" write security not passed
 1FFFh  "GSEC_NERR" group security not passed
 20FFh  "SEC1_NERR" security file failure
 21FFh  "ACT1_NERR" activity file failure
 22FFh  "SPL1_NERR" spool control file failure
 23FFh  "NMT_NERR" device not mounted (spooling)
 24FFh  "RSPL_NERR" spool file has not been terminated
 25FFh  "DNSH_NERR" device not mounted or is not being shared
 26FFh  "DUP_NERR" duplicate node ID
 27FFh  "FNF_NERR" file not found error
 28FFh  "NMF_NERR" no more files
 29FFh  "UN_NERR" unknown internal system error
 2AFFh  "QCP_NERR" print queue is full or corrupted
 2BFFh  "IFNC_NERR" invalid function
 2CFFh  "IVH_NERR" invalid handle
 2DFFh  "TOF_NERR" too many files opened
 2EFFh  "PNF_NERR" path not found
 2FFFh  "SACT_NERR" named file is active
---10NET v5.0+ ---
 30FFh  "NAK_NERR" received NAK on send (destination out of buffers)
 31FFh  "RENT_NERR" reentrancy in driver F_SEND
 32FFh  "RECV_NERR" driver could not be put in receive mode
 33FFh  "NRLT_NERR" no more RLTAB entries left
 34FFh  "DIAL_NERR" function requires an unsupported dialect
 35FFh  "IVD_NERR" invalid device
 36FFh  "NALV_NERR" netname access level violated
 37FFh  "NPIDNF_NERR" network path not found
 38FFh  "SP_NERR" server is paused
 39FFh  "TMNM_NERR" too many remote user names
 3AFFh  "DUPD_NERR" duplicate network device
 3BFFh  "DIU_NERR" shared device in use, can't delete
 3CFFh  "NNWD_NERR" network name was deleted
 3DFFh  "NPFS_NERR" not enough space for print file
 3EFFh  "NNNF_NERR" network name not found (can't find the call name)
 3FFFh  "NB_NERR" network busy
 40FFh  "NDNLE_NERR" network device no longer exists
 41FFh  "NBCLE_NERR" NetBIOS command limit exceeded
 42FFh  "FINT24_NERR" Fail on INT 24h
 43FFh  "PEXP_NERR" password expired
 44FFh  "NPUP_NERR" new password error
 45FFh  "MAXS_NERR" maximum allowed disk space exceeded
 46FFh  "TDOW_NERR" time-of-day/day-of-week error
SeeAlso: #03767
Index:  error codes;10Net|10Net;error codes
--------b-6F00-------------------------------
INT 6F - HP Vectra EX-BIOS - "F_ISR" (internal) - RESPOND TO LOGICAL ISR
        AH = 00h
        BP = ID for driver (see #03741)
        DH = data type (see #03742)
        DL = physical device driver's index (driver ID / 6)
        BX,CX = data
        ES:0000h -> physical device's Describe Record (see #03749)
        ---keypress event data---
            BH = keyboard state (only if bit 5 of DH set) (see #03743)
            BL = scancode (if bit 4 of DH clear)
            CX = number of scancodes in list (if bit 4 of DH set)
            ES:SI -> scancode list (if bit 4 of DH set)
        ---motion event data---
            BX = new X position (abs device) or X increment (relative device)
            CX = new Y position (abs device) or Y increment (relative device)
        ---button event data
            BL = button information
                bits 15-8 reserved
                bit 7: button state (0 = down, 1 = up)
                bits 6-0: button number (0-7)
            BH = reserved
Return: AH = status (see #03744)
        BP,DS destroyed
        ---if device is keyboard translator---
            BL = translated scancode
            BH = new keyboard state (if DH bit 5 set) (see #03743)
            DH = new scancode type (see #03742)
Notes:  INT 6F corresponds to IRQ23 on the original HP Vectra AT, which is
          unavailable because of its use as a BIOS extension software interrupt
        the INT 6F handler consists of an instruction to load DS with the
          driver's data segment followed by an indexed far jump using BP to
          select the destination vector; since the interrupt handler is
          located immediately following the dispatch table, the HP_VECTOR_TABLE
          may be found by looking at offset 0000h in the INT 6F segment, and
          its size is equal to the offset of the interrupt handler
        each entry in the HP_VECTOR table consists of a DWORD for the driver's
          entry point address and a WORD for the driver's data segment
        this function is not user-callable, as it is a response to a physical
          event, and assumes that the caller has already handled the physical
          interrupt and updated the Describe Record (see #03749) to reflect
          the event
SeeAlso: INT 6C"HP Vectra",INT 6F/AX=0200h"HP Vectra"

(Table 03741)
Values for HP Vectra EX-BIOS driver ID:
 0000h  V_SCOPY (null driver, but DS value points at system copyright string)
 0006h  V_DOLITTLE (null driver)
 000Ch  V_PNULL (null driver)
 0012h  V_SYSTEM
 0018h  reserved
 001Eh  V_S8259
 0024h  reserved
 002Ah  V_SINPUT
 0030h  reserved
 0036h  V_QWERTY (keyboard translator)
 003Ch  V_SOFTKEY (keyboard translator)
 0042h  V_FUNCTION (keyboard translator)
 0048h  V_NUMPAD (keyboard translator)
 004Eh  V_CCP (keyboard translator)
 0054h  V_SVIDEO
 005Ah  V_STRACK
 0060h  V_EVENT_TOUCH
 0066h  V_EVENT_TABLET
 006Ch  V_EVENT_POINTER
 0072h  reserved
 0078h  reserved
 007Eh  reserved
 0084h  reserved
 008Ah  V_CCPCUR (keyboard translator)
 0090h  V_RAW (keyboard translator)
 0096h  V_CCPNUM (keyboard translator)
 009Ch  V_OFF (keyboard translator)
 00A2h  V_CCPGID (translator: cursor control pad keys to GID data)
 00A8h  V_SKEY2FKEY (keyboard translator)
 00AEh  V_8041
 00B4h  V_PGID_CCP
 00BAh  C_LTABLET
 00C0h  V_LPOINTER (pointing device: mouse, etc.)
 00C6h  V_LTOUCH (touch screen)
 00CCh  V_LHPMOUSE
 00D2h  ???
 ...
 0102h  ???
 0108h  V_LNULL
 010Eh  reserved
 0114h  V_HPHIL
 011Ah-01C2h reserved
 016Eh  V_SCANDOOR (scancode management chip driver) (ES/QS/RS only)
 01C8h-0228h available

(Table 03742)
Values for HP Vectra EX-BIOS ISR data type:
 00h    reserved "T_KC_R0"
 01h    reserved "T_KC_R1"
 02h    ASCII data
 03h    reserved "T_KC_R3"
 04h    HP150 keyboard (ITF) scancode
 05h    reserved "T_KC_R5"
 06h    device-definable type
 07h    HP Vectra keyboard set
 08h    IBM AT scancode set
 09h    button data
 0Ah    IBM PC scancode set
 0Bh    Softkey keypad (F1-F8)
 0Ch    function key keypad (F1-F10)
 0Dh    HP Cursor Control Pad keypad
 0Eh    Qwerty keypad
 0Fh    Numeric keypad
 1xh    bit 4 set: string of CX scancode of type 0xh at ES:SI
 2xh    bit 5 set: BH contains current keyboard state
 40h    signed 8-bit relative data
 41h    signed 16-bit relative data
 42h    unsigned 8-bit absolute data
 43h    unsigned 16-bit absolute data
 45h    specially-formed data (80x25) generated by V_LTOUCH
 46h    specially-formed data (640x200) generated by V_LTABLET
 47h    specially-formed data (640x200) generated by V_LPOINTER

Bitfields for HP Vectra EX-BIOS keyboard state:
Bit(s)  Description     (Table 03743)
 0      Alt pressed
 1      Left Shift pressed
 2      Right Shift pressed
 3      Ctrl pressed
 4      CapsLock active
 5      NumLock active
 6      Right unlabeled key pressed (some international keyboards)
 7      Left unlabeled key pressed (some international keyboards)
SeeAlso: #00582

(Table 03744)
Values for HP Vectra EX-BIOS status:
 00h    successful
 02h    unsupported function
 04h    not serviced
 06h    done (no further processing should be performed on the ISR event)
 F2h    device is out of paper
 F4h    device is offline
 F6h    no more space for more drivers
 F8h    driver is busy
 FAh    bad parameter
 FEh    operation failed
Note:   status codes are always even; negative values (>= 80h) indicate errors
          while positive values indicate exceptional conditions

Format of HP EX-BIOS driver header data:
Offset  Size    Description     (Table 03745)
 00h    WORD    driver attributes (see #03746)
 02h    WORD    string index of driver's name
 04h    WORD    driver's default logical device vector (see #03741)
 06h    WORD    driver's parent class (bitset) (see #03747)
 08h    WORD    driver's child class (bitset)
 0Ah    WORD    driver's parent vector
 0Ch    WORD    driver's child vector
 0Eh    BYTE    major subaddress
 0Fh    BYTE    minor subaddress
Notes:  this structure is located at offset 0 in the driver's data segment,
          which in turn may be read from the HP_VECTOR_TABLE (refer to note in
          main entry)
        only the first WORD is required, and everything from offset 6 onward
          is only required if the device wishes to perform device mapping
SeeAlso: #03748,#03749

Bitfields for HP EX-BIOS driver header attributes:
Bit(s)  Description     (Table 03746)
 15     this is a complete driver header
 14     "ATR_DEVCFG" reserved
 13     driver can be mapped with the parent vector at offset 0Ah
 12     driver can be mapped with the child vector at offset 0Ch
 11-9   driver type
        000 reserved vector
        001 free vector
        010 EX-BIOS service
        011 logical driver (mapped from parent to child)
        100 mappable driver (cannot be last in driver chain)
        101 mappable driver that is last in driver chain
        110 input driver (mappable)
        111 reserved
 8      "ATR_STRING" reserved
 7      call SF_START whenever driver is remapped
 6-5    addressing requirements
        00 no subaddresses required
        01 requires major address be stored at offset 0Eh
        10 requires minor address be stored at offset 0Fh
        11 required major,minor, and mid addresses (minor in low nybble of
              offset 0Fh, mid address in high nybble of 0Fh)
 4      driver can be shared between several parent drivers
 3      driver can be shared between several child drivers
 2      this driver header is in ROM
 1      "ATR_YIELD" reserved
 0      reserved
SeeAlso: #03745,#03747

Bitfields for HP EX-BIOS driver class:
Bit(s)  Description     (Table 03747)
 15     maps F1 to F8 softkeys
 14     keyboard
 13     cursor pad
 12     console device
 11     serial output device (may be capable of limited input)
 10     "CL_COMM" reserved
 9      interfaces multiple resources transparent to operating system
 8      serial output device filter (can be mapped between logical and physical
          driver to perform translations)
 7      addressed block device
 6      priority boot device
 5      logical graphics input device
 4      physical graphics input device (can map to child of another driver)
 3      "CL_GID" can map to an event
 2      physical touch device
 1      reserved
 0      class extension bit
Note:   special values: FFFFh maps to all other devices (V_PNULL), and 0000h
          maps to no other driver
SeeAlso: #03745

Format of HP EX-BIOS global data area:
Offset  Size    Description     (Table 03748)
 00h 20 BYTEs   reserved
 14h    BYTE    sound driver status
 15h    BYTE    number of pending key clicks (max 4) (see AH=34h/BP=0012h)
 16h    BYTE    current tick duration scaling factor
 17h    BYTE    current key click volume
 18h    WORD    current beep period (10 us increments) (see AH=3Ch/BP=0012h)
 1Ah    WORD    current beep duration (10 us increments)
 1Ch    BYTE    number of pending beep functions (max 4) (see AH=3Ah/BP=0012h)
 1Dh    BYTE    reserved
 1Eh    WORD    next unused string index number
 20h    ...     reserved
SeeAlso: #03745

Format of HP EX-BIOS Driver Describe Record:
Offset  Size    Description     (Table 03749)
 00h 16 BYTEs   EX-BIOS driver header data (see #03745)
 10h    BYTE    device GID type
                bits 7-4: device type
                bits 3-0: physical device link address
 11h    BYTE    physical device ID (see #03751)
 12h    WORD    logical device status bits (see #03750)
 14h    BYTE    physical device vector number (driver ID / 6)
 15h    BYTE    maximum number of axes reported (0-2)
 16h    BYTE    device class
                bits 7-4: current class
                bits 3-0: default class
 17h    BYTE    number of buttons/prompts
                bits 7-4: number of prompts
                bits 3-0: number of buttons
 18h    BYTE    reserved
 19h    BYTE    (physical devices only) maximum output burst length
 1Ah    BYTE    (physical devices only) number of write registers
 1Bh    BYTE    (physical devices only) number of read registers
 1Ch    BYTE    button transition flags (bit 0 = button0, etc.)
 1Dh    BYTE    current button states (bit 0 = button0, etc.)
 1Eh    WORD    device resolution
 20h    WORD    maximum x-axis count
 22h    WORD    maximum y-axis count
 24h    WORD    X position data for absolute devices
 26h    WORD    Y position data for absolute devices
 28h    WORD    X delta for relative devices
 2Ah    WORD    Y delta for relative devices
 2Ch    WORD    (logical devices only) X-axis scaling accumulator
                (fraction of one logical unit)
 2Eh    WORD    (logical devices only) Y-axis scaling accumulator
                (fraction of one logical unit)

Bitfields for HP logical device status flags:
Bit(s)  Description     (Table 03750)
 15-5   reserved
 4      event enabled
 3      tracking enabled
 2      clipping enabled
 1      button error occurred
 0      interrupt in progress
SeeAlso: #03749

(Table 03751)
Values for HP-HIL device ID:
 00h-02h reserved
 03h    Swiss-French keyboard
 04h-06h reserved
 07h    Canadian-English keyboard
 08h-0Ah reserved
 0Bh    Italian keyboard
 0Ch    reserved
 0Dh    Dutch keyboard
 0Eh    Swedish keyboard
 0Fh    German keyboard
 10h-12h reserved
 13h    Spanish keyboard
 14h    reserved
 15h    Belgian (Flemish) keyboard
 16h    Finnish keyboard
 17h    UK keyboard
 18h    French-Canadian keyboard
 19h    Swiss-German keyboard
 1Ah    Nerwegian keyboard
 1Bh    Frensh keyboard
 1Ch    Danish keyboard
 1Dh    Katakana keyboard
 1Eh    Latin American-Spanish keyboard
 1Fh    US-American keyboard
 20h-2Bh reserved
 2Ch-2Fh tone generator
 30h-3Fh reserved
 40h-5Bh reserved (character entry)
 5Ch-5Fh barcode reader
 60h-67h reserved (relative positions)
 68h-6Bh mouse
 6Ch-6Fh trackball
 70h-7Fh reserved (relative positions)
 80h-87h reserved (absolute positions)
 88h-8Bh touchpad
 8Ch-8Fh touch screen
 90h-97h graphics tablet
 98h-9Fh reserved (absolute positions)
 A0h-BFh compressed keyboard (91-93 keys)
 C0h-DFh extended keyboard (107-109 keys)
 E0h-FFh standard keyboard (85-87 keys)
--------N-6F01-------------------------------
INT 6F - 10NET - LOGOFF
        AH = 01h
        DS:DX -> superstation ID or nulls (12 bytes)
Return: CX = number of files closed
        AX = status (see also #03740)
            08FFh superstation ID not already logged in
SeeAlso: AH=00h"10NET",AH=81h
--------N-6F02-------------------------------
INT 6F - 10NET - STATUS OF NODE
        AH = 02h
        DS:DX -> 512-byte status record (see #03753)
Return: CF clear if successful
        CF set on error
            AX = error code (see #03740)
SeeAlso: INT 21/AX=5E01h"10NET"

(Table 03752)
Values for 10NET station type:
 00h    workstation
 01h    superstation
 02h    gateway station
 03h    gateway active
 04h    logged into multiple superstations
 05h    reserved

Format of 10NET node status record:
Offset  Size    Description     (Table 03753)
 00h  8 BYTEs   user name (0 if none)
 08h    BYTE    station type (see #03752)
 09h 24 BYTEs   list of superstations logged into more than one superstation
 21h 12 BYTEs   node ID
 2Dh    WORD    message count for this station (send for user node, receive for
                  superstations)
---for superstations only---
 2Fh    WORD    drives allocated (bit 0=A:, bit 1=B:,...)
 31h    BYTE    user service flags (see #03754)
 32h    BYTE    printers allocated (bit 0=LPT1,...)
 33h    BYTE    number of unprinted spool files
 34h    BYTE    number of opened files
 35h    BYTE    number of logged on nodes
 36h    BYTE    primary drive (1=A:)
 37h    BYTE    reserved
 38h  N BYTEs   list of logged on node IDs (each 12 bytes, max 37 IDs)
1F4h  3 BYTEs   time: sec/min/hrs
1F7h  3 BYTEs   date: day/mon/year-1980

Bitfields for 10NET user service flags:
Bit(s)  Description     (Table 03754)
 7      gate
 6      print permit on
 4      SUBMIT is on
 3      mail waiting for node
 2      calendar waiting for you
 1      news waiting for you
 0      mail waiting for you
--------b-6F0200-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_SYSTEM SF_INIT" - START INITIALIZING DRIVER
        AX = 0200h
        BP = driver ID (see #03741)
        BX = "last-used DS" value from HP global data area (see #03748)
Return: AH = status (see #03744)
        BX = new "last-used DS" value
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0202h,AH=0Ch"F_INS_FIXOWNDS"
--------b-6F0202-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_SYSTEM SF_START" - COMPLETE DRIVER INITIALIZ.
        AX = 0202h
        BP = driver ID (see #03741)
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0200h,AX=0204h"HP Vectra"
--------W-6F0204-----------------------------
INT 6F C - MS Windows 3.0 - DOS APPLICATION SWITCH HOOK
        AX = 0204h
Return: AX = status
            0000h switch is allowed
            other switch not allowed
Note:   intercepting this call will allow a DOS application to ensure that
          Windows will not switch away from it.
--------b-6F0204-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_SYSTEM SF_REPORT_STATE" - GET DRIVER STATE
        AX = 0204h
        BP = driver ID (see #03741)
Return: AH = status (see #03744)
        DX = device state from Logical Describe Record (see #03749,#03755)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0200h,AX=0206h"HP Vectra"

Bitfields for HP Vectra V_HPHIL driver state:
Bit(s)  Description     (Table 03755)
 0      link configuration in progress
 1      reserved
 2      no devices attached
 3      general failure
 4,5    reserved
 6      HP-HIL driver open
 7      reserved
 8      link has been reconfigured
 9      error during output request
 10     reserved
 11     output request complete
 12     timeout
 13-15  reserved
--------b-6F0206-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_SYSTEM SF_VERSION_DESC" - GET DRIVER VERSION
        AX = 0206h
        BP = driver ID (see #03741)
Return: AH = status (see #03744)
        BX = driver release date code
            (BL = BCD years since 1960, BH = BCD week number within year)
        CX = length of version string
        ES:DI -> version string
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0200h,AX=0204h"HP Vectra",AX=0208h
--------b-6F0208-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_SYSTEM SF_DEF_ATTR" - RESET TO DEFAULT ATTR
        AX = 0208h
        BP = driver ID (see #03741)
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0200h,AX=020Ah,AX=020Ch
--------b-6F020A-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_SYSTEM SF_GET_ATTR" - GET CURRENT ATTRIBUTES
        AX = 020Ah
        BP = driver ID (see #03741)
Return: AH = status (see #03744)
        BX,CX = current attributes
        BP,DS destroyed
        ---for V_LTOUCH, V_LPOINTER---
            BX = logical width
            CX = logical height
SeeAlso: AH=00h"HP Vectra",AX=0200h,AX=0208h,AX=020Ch
--------b-6F020C-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_SYSTEM SF_SET_ATTR" - SET DEVICE ATTRIBUTES
        AX = 020Ch
        BP = driver ID (see #03741)
        BX,CX = new attributes
        ---for V_LTOUCH, V_LPOINTER---
            BX = new logical width
            CX = new logical height
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0200h,AX=0208h,AX=020Ah
--------b-6F020E-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_SYSTEM SF_OPEN" - RESERVE DRIVER FOR ACCESS
        AX = 020Eh
        BP = driver ID (see #03741) for V_HPHIL, others
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   place device in open state, which allows output to the device
SeeAlso: AH=00h"HP Vectra",AX=0200h,AX=0208h,AX=0210h
--------b-6F0210-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_SYSTEM SF_CLOSE" - RELEASE DRIVER
        AX = 0210h
        BP = driver ID (see #03741) for V_HPHIL, others
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   place device in closed state, which disallows output to the device
SeeAlso: AH=00h"HP Vectra",AX=0200h,AX=0208h,AX=020Eh
--------b-6F0212-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_SYSTEM SF_TIMEOUT" - REPORT REQUESTED TIMEOUT
        AX = 0212h
        BP = driver ID (see #03741)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   report to driver that a previously-requested timeout interval has
          expired
SeeAlso: AH=00h"HP Vectra",AX=0200h,AX=0208h,AX=020Eh,AX=0214h,AX=0216h
--------b-6F0214-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_SYSTEM SF_INTERVAL" - 60 HZ INTERVAL EXPIRED
        AX = 0214h
        BP = driver ID (see #03741)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   report to driver that a previously-requested 60 Hz interval has
          expired
SeeAlso: AH=00h"HP Vectra",AX=0200h,AX=0208h,AX=020Eh,AX=0212h,AX=0216h
--------b-6F0216-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_SYSTEM SF_TEST" - PERFORM HARDWARE TEST
        AX = 0216h
        BP = driver ID (see #03741)
Return: AH = status (see #03744)
        BP,DS destroyed
        ---on failure---
        CX = length of reason string
        ES:DI -> string describing error
SeeAlso: AH=00h"HP Vectra",AX=0200h,AX=0208h,AX=020Eh,AX=0212h,AX=0214h
--------N-6F03-------------------------------
INT 6F - 10NET - GET ADDRESS OF CONFIGURATION TABLE
        AH = 03h
        DS:DI -> node ID (optional)
Return: ES:BX -> configuration table (see #03756)
SeeAlso: AH=13h,INT 21/AX=5E01h"10NET"

Format of 10NET configuration table:
Offset  Size    Description     (Table 03756)
-41     WORD    local device table address
-39     WORD    extended network error mapping table address
-37     WORD    shared device table address
-35     WORD    mounted device table address
-33     BYTE    receive buffer counter
-32     BYTE    collect buffer counter
-31     WORD    TUF address
-29     BYTE    enable flag
-28     BYTE    FCB keep flag
-27     WORD    reserved
---up to here, 10NET v3.3---
-25     WORD    count of dropped Send6F
-23     WORD    buffer start address
-21     WORD    comm driver base address
-19     WORD    send/receive retry count
-17     BYTE    number of 550ms loops before timeout
-16     WORD    UFH address
-14     WORD    CDIR address
-12     WORD    LTAB address
-10     WORD    SFH address
-8      WORD    FTAB address
-6      WORD    RLTAB address
-4      WORD    SMI address
-2      WORD    NTAB address
 00h    WORD    address of first CT_DRV
 02h    BYTE    number of DRV entries
 03h  8 BYTEs   login name
 0Bh 12 BYTEs   node ID (blank-padded)
 17h  6 BYTEs   node address
 1Dh    BYTE    flag
 1Eh    BYTE    CT_CFLG (chat permit)
                bit 1: sound bell
                bit 0: CHAT permit
 1Fh    BYTE    CT_PSFLG (see #03757)
 20h    BYTE    in 10Net flag
 21h    WORD    receive message count
 23h    WORD    send message count
 25h    WORD    retry count
 27h    WORD    failed count
 29h    WORD    driver errors
 2Bh    WORD    dropped responses/CHATs
 2Dh  9 BYTEs   LIST ID/NTAB address (3 entries--LPT1-3)
 36h  6 BYTEs   AUX ID/NTAB address (2 entries--COM1-2)
 3Ch    BYTE    active CB channel
 3Dh    BYTE    received 6F messages on queue
 3Eh  9 BYTEs   activity counters for channels 1-9
---beyond here, 10NET v3.3---
 47h    BYTE    bit 0: RS232 gate
                bit 1: Send6F gate (user set)
 48h    DWORD   pointer into gate (user set)
 4Ch    DWORD   pointer into 10Net send
 50h  N WORDs   addresses of timer blocks

Bitfields for CT_PSFLG:
Bit(s)  Description     (Table 03757)
 5      PRINT permit
 4      KB initiated
 3      CHAT called FOXPTRM
 2      SUBMIT active
 1      SUBMIT received
 0      SUBMIT permit
--------N-6F04-------------------------------
INT 6F - 10NET - SEND
        AH = 04h
        DS:BX -> send record (see #03758)
        DS:DX -> data (max 1024 bytes)
Return: CF clear if successful
        CF set on error
            AX = error code (see #03740)
SeeAlso: AH=05h"10NET",AH=09h"10NET",AH=0Ah"10NET"

Format of 10NET send record:
Offset  Size    Description     (Table 03758)
 00h 12 BYTEs   receiving node's ID
                if first byte has high-order bit set, message is directed to
                  the CT_RGATE vector at the receiver
                if second byte is 00h, first byte is taken as a CB
                  channel number and delivered to all nodes on same channel
 0Ch    WORD     length of data at DX
--------b-6F04--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_INS_BASEHPVT" - GET HP_VECTOR_TABLE ADDRESS
        AH = 04h
        BP = 0012h (driver ID for V_SYSTEM)
Return: AH = status (see #03744)
        ES = segment of HP_VECTOR_TABLE (see also AH=00h"HP Vectra")
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AH=06h"F_INS_XCHGFIX",AH=08h"F_INS_XCHGRSVD"
--------b-6F04--BP005A-----------------------
INT 6F - HP Vectra EX-BIOS - "F_TRACK_INIT" - RESET TRACKING DRIVER TO DEFAULTS
        AH = 04h
        BP = 005Ah (driver ID for V_STRACK)
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AH=06h"F_TRACK_ON",AH=08h"F_TRACK_OFF"
SeeAlso: AH=0Ah"F_DEF_MASKS",AH=0Ch"F_SET_LIMITS_X"
--------b-6F0400-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_LOCK" - RESERVE SUB-ADDRESSES
        AX = 0400h
        BP = driver ID (see #03741)
        DH,DL = major,minor address (optional)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   reserve specified sub-addresses on an already-allocated driver for
          exclusive access
Note:   this function is documented as present but unsupported in the drivers
          V_LTABLET, V_LPOINTER, and V_LTOUCH
SeeAlso: AX=0200h"HP Vectra",AX=0402h"SF_UNLOCK"
--------b-6F0400BP001E-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_ENABLE_SVC" - UNMASK 8041 SVC INT
        AX = 0400h
        BP = 001Eh (driver ID for V_S8259)
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0402h"SF_DISABLE_SVC",AX=0404h"SF_ENABLE_KBD"
SeeAlso: AX=0408h"SF_ENABLE_HPHIL"
--------b-6F0400BP002A-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_DEF_LINKS" - SET DEFAULT PARENTS
        AX = 0400h
        BP = 002Ah (driver ID for V_SINPUT)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   set the parent vectors in the physical device driver headers to their
          system defaults
SeeAlso: AH=00h"HP Vectra",AX=0402h/BP=002Ah,AX=0404h/BP=002Ah
SeeAlso: AH=06h"F_INQUIRE"
--------b-6F0400BP0054-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_VID_ID_HP" - INSTALLATION CHECK
        AX = 0400h
        BP = 0054h (driver ID for V_SVIDEO)
        ???
Return: AH = status (see #03744)
        BX = 4850h ('BP')
        BP,DS destroyed
        ???
Note:   only partially documented
SeeAlso: AX=0402h/BP=0054h,AX=0404h/BP=0054h,AX=0406h/BP=0054h
SeeAlso: AX=0408h/BP=0054h,AX=040Ah/BP=0054h
--------b-6F0400BP00CC-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_MOUSE_COM" - INIT INT 33 HANDLER
        AX = 0400h
        BP = 00CCh (driver ID for V_LHPMOUSE)
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0402h/BP=00CCh
--------b-6F0402-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_UNLOCK" - RELEASE SUB-ADDRESSES
        AX = 0402h
        BP = driver ID (see #03741)
        DH,DL = major,minor address (optional)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   release specified sub-addresses from exclusive access
Note:   this function is documented as present but unsupported in the drivers
          V_LTABLET, V_LPOINTER, and VLTOUCH
SeeAlso: AX=0200h"HP Vectra",AX=0400h"SF_LOCK"
--------b-6F0402BP001E-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_DISABLE_SVC" - MASK 8041 SVC INT
        AX = 0402h
        BP = 001Eh (driver ID for V_S8259)
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0400h/BP=001Eh,AX=0406h/BP=001Eh
SeeAlso: AX=040Ah/BP=001Eh
--------b-6F0402BP002A-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_GET_LINKS" - GET DRIVER LINK FIELDS
        AX = 0402h
        BP = 002Ah (driver ID for V_SINPUT)
        ES:SI -> buffer for link table (see #03759)
Return: AH = status (see #03744)
        ES:SI buffer filled
        BP,DS destroyed
Desc:   get the parent and child vectors for the seven supported physical
          device drivers
SeeAlso: AH=00h"HP Vectra",AX=0400h"SF_DEF_LINKS",AX=0404h"SF_SET_LINKS"
SeeAlso: AH=06h"F_INQUIRE"

Format of HP Vectra EX-BIOS driver link table:
Offset  Size    Description     (Table 03759)
 00h    BYTE    vector number of HP-HIL device #1's child
 01h    BYTE    vector number of HP-HIL device #1's parent
        ...
 0Ch    BYTE    vector number of HP-HIL device #7's child
 0Dh    BYTE    vector number of HP-HIL device #7's parent
--------b-6F0402BP0054-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_VID_GET_INFO" - GET DISPLAY INFO
        AX = 0402h
        BP = 0054h (driver ID for V_SVIDEO)
        ???
Return: AH = status (see #03744)
        BP,DS destroyed
        ???
Note:   only partially documented
SeeAlso: AX=0400h/BP=0054h,AX=0404h/BP=0054h,AX=0406h/BP=0054h
SeeAlso: AX=0408h/BP=0054h,AX=040Ah/BP=0054h
--------b-6F0402BP00CC-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_MOUSE_COM" - FORCE INT 33 INIT
        AX = 0402h
        BP = 00CCh (driver ID for V_LHPMOUSE)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   set up INT 33 even if no mouse is installed
SeeAlso: AH=00h"HP Vectra",AX=0400h/BP=00CCh
--------b-6F0404-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_TRACK_ON" - GRAPHICS CURSOR ON
        AX = 0404h
        BP = driver ID (see #03741) for V_LPOINTER, V_LTOUCH, V_LTABLET
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   enables graphics cursor tracking of the logical device's movement
SeeAlso: AH=00h"HP Vectra",AX=0400h"SF_LOCK",AX=0406h"SF_TRACK_OFF"
--------b-6F0404BP001E-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_ENABLE_KBD" - UNMASK 8041 OBF INT
        AX = 0404h
        BP = 001Eh (driver ID for V_S8259)
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0400h"SF_ENABLE_SVC",AX=0406h"SF_DISABLE_KBD"
SeeAlso: AX=0408h"SF_ENABLE_HPHIL"
--------b-6F0404BP002A-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_SET_LINKS" - SET DRIVER LINK FIELDS
        AX = 0404h
        BP = 002Ah (driver ID for V_SINPUT)
        ES:SI -> buffer containing link table (see #03759)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   specify the parent and child vectors for the seven supported physical
          device drivers
SeeAlso: AH=00h"HP Vectra",AX=0400h"SF_DEF_LINKS",AX=0402h"SF_GET_LINKS"
SeeAlso: AH=06h"F_INQUIRE"
--------b-6F0404BP0054-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_VID_SET_INFO" - SET EXT-CTRL INFO
        AX = 0404h
        BP = 0054h (driver ID for V_SVIDEO)
        ???
Return: AH = status (see #03744)
        BP,DS destroyed
        ???
Note:   only partially documented
SeeAlso: AX=0400h/BP=0054h,AX=0402h/BP=0054h,AX=0406h/BP=0054h
SeeAlso: AX=0408h/BP=0054h,AX=040Ah/BP=0054h
--------b-6F0406-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_TRACK_OFF" - GRAPHICS CURSOR OFF
        AX = 0406h
        BP = driver ID (see #03741) for V_LPOINTER, V_LTOUCH, V_LTABLET
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   disables graphics cursor tracking of the logical device's movement
SeeAlso: AH=00h"HP Vectra",AX=0400h"SF_LOCK",AX=0404h"SF_TRACK_ON"
SeeAlso: AX=0408h"SF_CREATE_EVENT"
--------b-6F0406BP001E-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_DISABLE_KBD" - MASK 8041 OBF INT
        AX = 0406h
        BP = 001Eh (driver ID for V_S8259)
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0402h"SF_DISABLE_SVC",AX=0404h"SF_ENABLE_KBD"
SeeAlso: AX=040Ah"SF_DISABLE_HPHIL"
--------b-6F0406BP0054-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_VID_MOD_INFO" - SET EXT-CTRL REG
        AX = 0406h
        BP = 0054h (driver ID for V_SVIDEO)
        ???
Return: AH = status (see #03744)
        BP,DS destroyed
        ???
Note:   only partially documented
SeeAlso: AX=0400h/BP=0054h,AX=0402h/BP=0054h,AX=0404h/BP=0054h
SeeAlso: AX=0408h/BP=0054h,AX=040Ah/BP=0054h
--------b-6F0406BP0114-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_CRV_RECONFIGURE" - RECONFIG LINK
        AX = 0406h
        BP = 0114h (driver ID for V_HPHIL)
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=020Eh,AX=0408h"SF_CRV_WR_PROMPTS"
SeeAlso: AX=0410h"SF_CRV_SELF_TEST"
--------b-6F0408-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_CREATE_EVENT" - SET EVENT HANDLER
        AX = 0408h
        BP = driver ID (see #03741) for V_LPOINTER, V_LTOUCH, V_LTABLET
        ES:SI -> new event handler (see AH=00h"HP Vectra")
        DX = new handler's DS
Return: AH = status (see #03744)
        ES:SI -> old event handler
        DX = old handler's DS
        BP,DS destroyed
Desc:   specify routine to be called on logical device events
Note:   when events occur, the event handler is called with the same registers
          as the "F_ISR" function on AH=00h"HP Vectra"
SeeAlso: AH=00h"HP Vectra",AX=0400h"SF_LOCK",AX=0406h"SF_TRACK_OFF"
SeeAlso: AX=040Ah"SF_EVENT_ON",AX=040Ch"SF_EVENT_OFF",AH=06h"F_SAMPLE"
--------b-6F0408BP001E-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_ENABLE_HPHIL" - UNMASK HP-HIL INT
        AX = 0408h
        BP = 001Eh (driver ID for V_S8259)
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0400h/BP=001Eh,AX=0404h/BP=001Eh
SeeAlso: AX=040Ah/BP=001Eh
--------b-6F0408BP0054-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_VID_GET_RES" - GET VIDMODE RESOLUTN
        AX = 0408h
        BP = 0054h (driver ID for V_SVIDEO)
        ???
Return: AH = status (see #03744)
        BP,DS destroyed
        ???
Note:   only partially documented
SeeAlso: AX=0400h/BP=0054h,AX=0402h/BP=0054h,AX=0404h/BP=0054h
SeeAlso: AX=0406h/BP=0054h,AX=040Ah/BP=0054h
--------b-6F0408BP0114-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_CRV_WR_PROMPTS" - WRITE PROMPT
        AX = 0408h
        BP = 0114h (driver ID for V_HPHIL)
        BX = device address indicator (see #03760)
        DH = HP HIL device major address
        DL = prompt number
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=020Eh,AX=0406h/BP=0114h,AX=040Ah/BP=0114h

Bitfields for HP Vectra V_HPHIL device address indicator:
Bit(s)  Description     (Table 03760)
 15-14  reserved
 13     address in DH is valid (must be set, clear is reserved)
 12     valid value in DL
 11-0   reserved
--------b-6F040A-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_EVENT_ON" - ENABLE EVENT HANDLER
        AX = 040Ah
        BP = driver ID (see #03741) for V_LPOINTER, V_LTOUCH, V_LTABLET
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0408h"SF_CREATE_EVENT",AX=040Ch"SF_EVENT_OFF"
SeeAlso: AX=040Eh"SF_CLIPPING_ON"
--------b-6F040ABP001E-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_DISABLE_HPHIL" - MASK HP-HIL INT
        AX = 040Ah
        BP = 001Eh (driver ID for V_S8259)
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0402h/BP=001Eh,AX=0406h/BP=001Eh
SeeAlso: AX=0408h/BP=001Eh
--------b-6F040ABP0054-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_VID_SET_MODE" - SET VIDEO MODE
        AX = 040Ah
        BP = 0054h (driver ID for V_SVIDEO)
        ???
Return: AH = status (see #03744)
        BP,DS destroyed
        ???
Note:   only partially documented
SeeAlso: AX=0400h/BP=0054h,AX=0402h/BP=0054h,AX=0404h/BP=0054h
SeeAlso: AX=0406h/BP=0054h,AX=0408h/BP=0054h
--------b-6F040ABP00AE-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_CREATE_INTR" - CREATE INTERVAL ENTRY
        AX = 040Ah
        BP = 00AEh (driver ID for V_8041)
        BH = vector number of driver to be called regularly (vector addr / 6)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   add a driver to the list (max eight) of drivers which will be called
          by the HP's 8041 at 60 Hz
Note:   the newly added entry will not be called until enabled with
          AX=040Eh/BP=00AEh
SeeAlso: AH=00h"HP Vectra",AX=040Ch/BP=00AEh,AX=040Eh/BP=00AEh
SeeAlso: AX=0412h/BP=00AEh,AX=0416h/BP=00AEh,AX=041Ah/BP=00AEh
--------b-6F040ABP0114-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_CRV_WR_ACK" - ACKNOWLEDGE DEVICE
        AX = 040Ah
        BP = 0114h (driver ID for V_HPHIL)
        BX = device address indicator (see #03760)
        DH = HP HIL device major address
        DL = acknowledge number (specific if 01h-07h, generic otherwise)
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0406h/BP=0114h,AX=040Ch/BP=0114h
--------b-6F040C-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_EVENT_OFF" - DISABLE EVENT HANDLER
        AX = 040Ch
        BP = driver ID (see #03741) for V_LPOINTER, V_LTOUCH, V_LTABLET
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0408h"SF_CREATE_EVENT",AX=040Ah"SF_EVENT_ON"
--------b-6F040CBP00AE-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_DELET_INTR" - DELETE INTERVAL ENTRY
        AX = 040Ch
        BP = 00AEh (driver ID for V_8041)
        BH = vector number of driver to be removed (vector addr / 6)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   remove a driver to the list (max eight) of drivers which will be called
          by the HP's 8041 at 60 Hz
SeeAlso: AH=00h"HP Vectra",AX=040Ah/BP=00AEh,AX=0410h/BP=00AEh
SeeAlso: AX=0412h/BP=00AEh,AX=0416h/BP=00AEh,AX=041Ah/BP=00AEh
--------b-6F040CBP0114-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_CRV_REPEAT" - SET KEY REPEAT RATE
        AX = 040Ch
        BP = 0114h (driver ID for V_HPHIL)
        BX = device address indicator (see #03760)
        DH = HP HIL device major address
        DL = repeat rate (00h = 30 Hz, 01h = 60 Hz)
Return: AH = status (see #03744)
        BP,DS destroyed
Note:   this function is only available if the driver is in the open state
          (see AX=020Eh"SF_OPEN")
SeeAlso: AH=00h"HP Vectra",AX=040Ah/BP=0114h,AX=040Eh/BP=0114h
--------b-6F040E-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_CLIPPING_ON" - ENABLE CLIPPING
        AX = 040Eh
        BP = driver ID (see #03741) for V_LPOINTER, V_LTOUCH, V_LTABLET
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   causes the physical device's motion to be clipped to prevent overflow
          or underflow of the logical position
SeeAlso: AH=00h"HP Vectra",AX=040Ah"SF_EVENT_ON",AX=0410h"SF_CLIPPING_OFF"
--------b-6F040EBP00AE-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_ENABL_INTR" - START INTERRUPT SRVICE
        AX = 040Eh
        BP = 00AEh (driver ID for V_8041)
        BH = vector number of driver to be called regularly (vector addr / 6)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   enable 60 Hz calling of a driver previously added to the list of
          drivers to be called by the HP's 8041
SeeAlso: AH=00h"HP Vectra",AX=040Ah/BP=00AEh,AX=0410h/BP=00AEh
SeeAlso: AX=0412h/BP=00AEh,AX=0416h/BP=00AEh,AX=041Ah/BP=00AEh
--------b-6F040EBP0114-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_CRV_DISABLE_REPEAT" - KEY REPT OFF
        AX = 040Eh
        BP = 0114h (driver ID for V_HPHIL)
        BX = device address indicator (see #03760)
        DH = HP HIL device major address
Return: AH = status (see #03744)
        BP,DS destroyed
Note:   this function is only available if the driver is in the open state
          (see AX=020Eh"SF_OPEN")
SeeAlso: AH=00h"HP Vectra",AX=040Ch/BP=0114h,AX=0410h/BP=0114h
SeeAlso: AX=0416h/BP=0114h
--------b-6F0410-----------------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_CLIPPING_OFF" - DISABLE CLIPPING
        AX = 0410h
        BP = driver ID (see #03741) for V_LPOINTER, V_LTOUCH, V_LTABLET
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   disables clipping of the physical device's motion, which may cause
          overflow or underflow of the logical position
SeeAlso: AH=00h"HP Vectra",AX=040Ah"SF_EVENT_ON",AX=040Eh"SF_CLIPPING_ON"
--------b-6F0410BP00AE-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_DISBL_INTR" - END INTERRUPT SERVICE
        AX = 0410h
        BP = 00AEh (driver ID for V_8041)
        BH = vector number of driver (vector addr / 6)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   disable 60 Hz interval calls to the specified driver
SeeAlso: AH=00h"HP Vectra",AX=040Ch/BP=00AEh,AX=040Eh/BP=00AEh
SeeAlso: AX=0412h/BP=00AEh,AX=0416h/BP=00AEh,AX=041Ah/BP=00AEh
--------b-6F0410BP0114-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_CRV_SELF_TEST" - PERFORM SELFTEST
        AX = 0410h
        BP = 0114h (driver ID for V_HPHIL)
        BX = device address indicator (see #03760)
        DH = HP HIL device major address
        ES:SI -> buffer for result
Return: AH = status (see #03744)
        CX = number of bytes in buffer
        BP,DS destroyed
Note:   this function is only available if the driver is in the open state
          (see AX=020Eh"SF_OPEN")
SeeAlso: AH=00h"HP Vectra",AX=040Ch/BP=0114h,AX=0412h/BP=0114h
--------b-6F0412BP00AE-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_SET_RAMSW" - SET RAM SWITCH IN 8041
        AX = 0412h
        BP = 00AEh (driver ID for V_8041)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   sets a flag in the 8041 indicating that a second 256K bank of RAM
          on the motherboard is enabled
SeeAlso: AH=00h"HP Vectra",AX=040Ch/BP=00AEh,AX=040Eh/BP=00AEh
SeeAlso: AX=0414h/BP=00AEh,AX=0416h/BP=00AEh,AX=041Ah/BP=00AEh
--------b-6F0412BP0114-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_CRV_REPORT_STATUS" - GET DEVSTATUS
        AX = 0412h
        BP = 0114h (driver ID for V_HPHIL)
        BX = device address indicator (see #03760)
        DH = HP HIL device major address
        ES:SI -> 15-byte buffer for status
Return: AH = status (see #03744)
        CX = number of bytes returned in buffer
        BP,DS destroyed
Note:   this function is only available if the driver is in the open state
          (see AX=020Eh"SF_OPEN")
SeeAlso: AH=00h"HP Vectra",AX=0410h/BP=0114h,AX=0414h/BP=0114h
--------b-6F0414BP00AE-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_CLR_RAMSW" - CLEAR 8041 RAM SWITCH
        AX = 0414h
        BP = 00AEh (driver ID for V_8041)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   clears a flag in the 8041 indicating that a second 256K bank of RAM
          on the motherboard is enabled, causing the second bank to be disabled
Note:   this function should normally never be called
SeeAlso: AH=00h"HP Vectra",AX=040Ch/BP=00AEh,AX=040Eh/BP=00AEh
SeeAlso: AX=0412h/BP=00AEh,AX=0418h/BP=00AEh,AX=041Ah/BP=00AEh
--------b-6F0414BP0114-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_CRV_REPORT_NAME" - GET DEV NAME
        AX = 0414h
        BP = 0114h (driver ID for V_HPHIL)
        BX = device address indicator (see #03760)
        DH = HP HIL device major address
        ES:SI -> 15-byte buffer for name
Return: AH = status (see #03744)
        CX = number of bytes returned in buffer
        BP,DS destroyed
Note:   this function is only available if the driver is in the open state
          (see AX=020Eh"SF_OPEN")
SeeAlso: AH=00h"HP Vectra",AX=0412h/BP=0114h
--------b-6F0416BP00AE-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_SET_CRTSW" - SET CRT TO MULTIMODE
        AX = 0416h
        BP = 00AEh (driver ID for V_8041)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   sets a flag in the 8041 indicating that the primary display is the
          Multimode graphics adapter (default)
SeeAlso: AH=00h"HP Vectra",AX=040Ch/BP=00AEh,AX=040Eh/BP=00AEh
SeeAlso: AX=0412h/BP=00AEh,AX=0418h/BP=00AEh,AX=041Ah/BP=00AEh
--------b-6F0416BP0114-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_KEYBOARD_REPEAT" - SET TYPEMATIC
        AX = 0416h
        BP = 0114h (driver ID for V_HPHIL)
        BH = what to set (00h typematic rate, 01h delay, 02h both)
        BL = flag (00h = non-CCP keypad, 01h = Cursor Control Pad only)
        DL = rate
            bits 7-4: delay value
            bits 3-0: typematic rate
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=040Eh/BP=0114h,AX=0418h/BP=0114h
--------b-6F0418BP00AE-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_CLR_CRTSW" - SET CRT TO MONOCHROME
        AX = 0418h
        BP = 00AEh (driver ID for V_8041)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   clears a flag in the 8041, indicating that the primary display is the
          monochrome adapter
SeeAlso: AH=00h"HP Vectra",AX=040Ch/BP=00AEh,AX=040Eh/BP=00AEh
SeeAlso: AX=0414h/BP=00AEh,AX=0416h/BP=00AEh,AX=041Ah/BP=00AEh
--------b-6F0418BP0114-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_KEYBOARD_LED" - SET KEYBOARD LEDS
        AX = 0418h
        BP = 0114h (driver ID for V_HPHIL)
        BL = new LED states
            bit 0: scroll lock
            bit 1: NumLock
            bit 2: CapsLock
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=040Eh/BP=0114h,AX=0416h/BP=0114h
--------b-6F041ABP00AE-----------------------
INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_PASS_THRU" - SEND DATA BYTE TO 8041
        AX = 041Ah
        BP = 00AEh (driver ID for V_8041)
        BL = byte to send to 8041
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=040Ah/BP=00AEh,AX=040Eh/BP=00AEh
--------N-6F05-------------------------------
INT 6F - 10NET - RECEIVE
        AH = 05h
        CX = number of seconds before timeout
        DS:DX -> receive buffer (see #03761)
Return: CF clear if successful
            AH = FEh if dequeued message is a CB message
        CF set on error
            AX = error code (see #03740)
SeeAlso: AH=04h"10NET"

Format of 10NET receive buffer:
Offset  Size    Description     (Table 03761)
 00h 12 BYTEs   sending node's ID
 0Ch    WORD    length of message
 0Eh  N BYTEs   message (maximum 1024 bytes)
--------b-6F06-------------------------------
INT 6F - HP Vectra EX-BIOS - "F_PUT_BYTE" - WRITE A BYTE OF DATA TO DEVICE
        AH = 06h
        BP = driver ID (see #03741) for V_HPHIL, others
        AL = value to output
        ---if driver is V_HPHIL---
        BX = device address indicator (see #03760)
        DH = HP HIL device major address
        DL = HP-HIL device register (00h-7Fh)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   output a byte to a specific HP-HIL device register
Note:   this function is only available if the driver is in the open state
          (see AX=020Eh"SF_OPEN")
SeeAlso: AH=04h"HP Vectra",AH=08h"F_GET_BYTE",AH=0Ah"F_PUT_BUFFER"
--------b-6F06-------------------------------
INT 6F - HP Vectra EX-BIOS - "F_SAMPLE" - POLL CURRENT ABSOLUTE POSITION
        AH = 06h
        BP = driver ID (see #03741) for V_LTOUCH, V_LPOINTER, V_LTABLET, etc.
Return: AH = status (see #03744)
        BX = current logical X position
        CX = current logical Y position
        DL = button transitions (bit N = button N state has changed)
        DH = current button states (bit N = current button N state)
        ES:0000h -> logical device's Describe Record (see #03749)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=040Ah"SF_EVENT_ON",AX=040Eh"SF_CLIPPING_ON"
--------b-6F06--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_INS_XCHGFIX" - EXCH VALUES WITH FIXED VECTOR
        AH = 06h
        BP = 0012h (driver ID for V_SYSTEM)
        BX = vector address
        DX = new value for DS
        ES:DI -> new CS:IP entry point
Return: AH = status (see #03744)
        DX = old value for DS
        ES:DI -> old CS:IP entry point
        BP,DS destroyed
Desc:   replace an existing EX-BIOS driver at a fixed HPVT location without
          initialization
SeeAlso: AH=00h"HP Vectra",AH=04h"F_INS_BASEHPVT",AH=08h"F_INS_XCHGRSVD"
SeeAlso: AH=0Ah"F_INS_XCHGFREE",AH=0Ch"F_INS_FIXOWNDS"
--------b-6F06--BP002A-----------------------
INT 6F - HP Vectra EX-BIOS - "F_INQUIRE" - GET DRIVER PHYSICAL DESCRIBE RECORD
        AH = 06h
        BP = 002Ah (driver ID for V_SINPUT)
        AL = HP-HIL physical device number (01h-07h)
Return: AH = status (see #03744)
        ES:SI -> physical describe record for driver
        BP,DS destroyed
Note:   the returned physical describe record must not be modified
SeeAlso: AH=00h"HP Vectra",AX=0400h/BP=002Ah,AH=08h/BP=002Ah,AH=0Ah/BP=002Ah
SeeAlso: AH=0Ch/BP=002Ah
--------b-6F06--BP005A-----------------------
INT 6F - HP Vectra EX-BIOS - "F_TRACK_ON" - ENABLE CURSOR TRACKING
        AH = 06h
        BP = 005Ah (driver ID for V_STRACK)
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AH=04h"F_TRACK_INIT",AH=08h"F_TRACK_OFF"
SeeAlso: AH=0Ah"F_DEF_MASKS",AH=0Ch"F_SET_LIMITS_X"
--------N-6F07-------------------------------
INT 6F - 10NET - LOCK HANDLE
        AH = 07h
        BX = file handle
        CX:DX = starting offset in file
        SI = record length
Return: CF clear if successful
        CF set on error
            AX = error code (see also AH=00h)
                0002h file not found
SeeAlso: AH=08h"10NET",AH=0Fh,INT 21/AH=5Ch
--------N-6F08-------------------------------
INT 6F - 10NET - UNLOCK HANDLE
        AH = 08h
        BX = file handle
        AL = mode
            00h unlock all
            01h unlock record at CX:DX
Return: CF clear if successful
        CF set on error
            AX = error code (see also AH=00h)
                0002h file not found
SeeAlso: AH=07h,AH=0Fh,INT 21/AH=5Ch
--------b-6F08-------------------------------
INT 6F - HP Vectra EX-BIOS - "F_GET_BYTE" - READ A BYTE OF DATA FROM DEVICE
        AH = 08h
        BP = driver ID (see #03741) for V_HPHIL (0114h), others
        ---if device is V_HPHIL---
        BX = device address indicator (see #03760)
        DH = HP HIL device major address
        DL = HP-HIL device register (00h-7Fh)
Return: AH = status (see #03744)
        AL = value read from device
        BP,DS destroyed
Desc:   generic read-byte function; for driver V_HPHIL, retrieves the value
          of a specific HP-HIL device register
Note:   this function is only available if the driver is in the open state
          (see AX=020Eh"SF_OPEN")
SeeAlso: AH=06h"F_PUT_BYTE",AH=0Ah"F_PUT_BUFFER",AH=0Ch"F_GET_BUFFER"
--------b-6F08--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_INS_XCHGRSVD" - EXCH VALUES WITH RESRVED VECTOR
        AH = 08h
        BP = 0012h (driver ID for V_SYSTEM)
        DX = new value for DS
        ES:DI -> new CS:IP entry point
Return: AH = status (00h,F6h) (see also #03744)
            00h successful
                BX = vector address used
                DX = old value for DS
                ES:DI -> old CS:IP entry point
        BP,DS destroyed
Desc:   exchange the supplied entry point and DS with the values in the next
          reserved entry in the HP_VECTOR_TABLE
Note:   returns AH=F6h if no more reserved vectors are available
SeeAlso: AH=00h"HP Vectra",AH=04h/BP=0012h,AH=06h/BP=0012h,AH=0Ah/BP=0012h
SeeAlso: AH=0Ch/BP=0012h
--------b-6F08--BP002A-----------------------
INT 6F - HP Vectra EX-BIOS - "F_INQUIRE_ALL" - GET DRIVER STATUS TABLE
        AH = 08h
        BP = 002Ah (driver ID for V_SINPUT)
        ES:SI -> buffer for device status table (see #03762)
Return: AH = status (see #03744)
        ES:SI buffer filled
        BP,DS destroyed
Note:   the returned physical describe record must not be modified
SeeAlso: AH=00h"HP Vectra",AX=0400h/BP=002Ah,AH=06h/BP=002Ah,AH=0Ah/BP=002Ah
SeeAlso: AH=0Ch/BP=002Ah

Format of HP Vectra HP-HIL physical device status table:
Offset  Size    Description     (Table 03762)
 00h    BYTE    status for HP-HIL device #1
                bit 0: device present
                bits 7-2 reserved
 01h    BYTE    device ID for HP-HIL device #1
        ...
 0Ch    BYTE    status for HP-HIL device #7
 0Dh    BYTE    device ID for HP-HIL device #7
--------b-6F08--BP005A-----------------------
INT 6F - HP Vectra EX-BIOS - "F_TRACK_OFF" - DISABLE CURSOR TRACKING
        AH = 08h
        BP = 005Ah (driver ID for V_STRACK)
Return: AH = status (see #03744)
        BP,DS destroyed
Note:   also removes the graphics cursor sprite from the screen
SeeAlso: AH=00h"HP Vectra",AH=04h"F_TRACK_INIT",AH=06h"F_TRACK_ON"
SeeAlso: AH=0Ah"F_DEF_MASKS",AH=0Ch"F_SET_LIMITS_X"
--------N-6F09-------------------------------
INT 6F - 10NET - SUBMIT
        AH = 09h
        DS:BX -> submit record (see #03763)
SeeAlso: AH=04h"10NET"

Format of 10NET submit record:
Offset  Size    Description     (Table 03763)
 00h 12 BYTEs   destination node ID (must be logged in)
 0Ch    WORD    length+2 of following 'command line' text
 0Eh  N BYTEs   command line text (<=100 bytes), system adds CR
--------N-6F0A-------------------------------
INT 6F - 10NET - CHAT
        AH = 0Ah
        DS:BX -> control parameters (see #03764)
        DS:DX -> chat message (see #03765)
SeeAlso: AH=04h"10NET",AH=8Ah

Format of 10NET chat control parameters:
Offset  Size    Description     (Table 03764)
 00h  8 BYTEs   sender ID, defaults to node's userID if nulls
 08h  8 BYTEs   destination user ID, 'EVERYONE' may be used
 10h 12 BYTEs   destination node ID

Format of 10NET chat message:
Offset  Size    Description     (Table 03765)
 00h    WORD    length+2 of following text
 02h  N BYTEs   text, max 101 bytes
--------b-6F0A-------------------------------
INT 6F - HP Vectra EX-BIOS - "F_PUT_BUFFER" - WRITE A BUFFER TO DEVICE
        AH = 0Ah
        BP = driver ID (see #03741) for V_HPHIL (0114h), others
        CX = number of bytes to write
        ES:DI -> buffer containing data
        ---if driver is V_HPHIL---
        BX = device address indicator (see #03760)
        DH = HP HIL device major address
        DL = HP-HIL device register (00h-7Fh)
Return: AH = status (see #03744)
        CX = number of unwritten bytes left in buffer
        BP,DS destroyed
SeeAlso: AH=06h"F_PUT_BYTE",AH=0Ah"F_PUT_BLOCK",AH=0Ch"F_GET_BUFFER"
SeeAlso: AH=0Eh"F_PUT_WORD"
--------b-6F0A-------------------------------
INT 6F - HP Vectra EX-BIOS - "F_PUT_BLOCK" - WRITE BLOCKS TO DEVICE
        AH = 0Ah
        BP = driver ID (see #03741) for block device
        DH = device major number
        DL = device minor number
        ES:DI -> command block (see #03766)
Return: AH = status (see #03744)
        BX = operation status
        BP,DS destroyed
SeeAlso: AH=06h"F_PUT_BYTE",AH=0Ah"F_PUT_BUFFER",AH=0Ch"F_GET_BUFFER"
SeeAlso: AH=0Eh"F_PUT_WORD"

Format of HP Vectra F_PUT_BLOCK/F_GET_BLOCK command block:
Offset  Size    Description     (Table 03766)
 00h    DWORD   data transfer address
 04h    WORD    number of blocks
 06h    DWORD   block address (some devices only use low word)
--------b-6F0A--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_INS_XCHGFREE" - EXCH VALUES WITH FREE VECTOR
        AH = 0Ah
        BP = 0012h (driver ID for V_SYSTEM)
        DX = new value for DS
        ES:DI -> new CS:IP entry point
Return: AH = status (00h,F6h) (see also #03744)
            00h successful
                BX = vector address used
                DX = old value for DS
                ES:DI -> old CS:IP entry point
        BP,DS destroyed
Desc:   exchange the supplied entry point and DS with the values in the next
          free entry in the HP_VECTOR_TABLE
Note:   returns AH=F6h if no more reserved vectors are available
SeeAlso: AH=00h"HP Vectra",AH=04h/BP=0012h,AH=06h/BP=0012h,AH=08h/BP=0012h
SeeAlso: AH=0Ch/BP=0012h
--------b-6F0A--BP002A-----------------------
INT 6F - HP Vectra EX-BIOS - "F_INQUIRE_FIRST" - GET PHYSICAL DRIVER VECTOR
        AH = 0Ah
        BP = 002Ah (driver ID for V_SINPUT)
Return: AH = status (see #03744)
        BX = vector address for first HP-HIL device
        BP,DS destroyed
Note:   all seven HP-HIL devices use consecutive vectors in the
          HP_VECTOR_TABLE
SeeAlso: AH=00h"HP Vectra",AX=0400h/BP=002Ah,AH=06h/BP=002Ah,AH=08h/BP=002Ah
SeeAlso: AH=0Ch/BP=002Ah
--------b-6F0A--BP005A-----------------------
INT 6F - HP Vectra EX-BIOS - "F_DEF_MASKS" - DEFINE GRAPHICS CURSOR MASKS
        AH = 0Ah
        BP = 005Ah (driver ID for V_STRACK)
        BH = width of save area in bytes
        BL = hot-spot X coordinate
        CH = height in scan lines
        CL = hot-spot Y coordinate
        ES:SI -> sprite mask (screen mask followed by XOR sprite mask)
Return: AH = status (see #03744)
        BP,DS destroyed
Note:   the save area is one byte wider than the actual sprite mask; the total
          size of the sprite is at most 144 bytes
SeeAlso: AH=00h"HP Vectra",AH=04h"F_TRACK_INIT",AH=08h"F_TRACK_OFF"
SeeAlso: AH=0Ch"F_SET_LIMITS_X",AH=10h"F_PUT_SPRITE",AH=12h"F_REMOVE_SPRITE"
--------N-6F0B-------------------------------
INT 6F - 10NET - LOCK SEMAPHORE, RETURN IMMEDIATELY
        AH = 0Bh
        AL = drive number or 0
        ES:SI = Ethernet address or 0
        DS:BX -> 31-byte ASCIZ semaphore name
Return: AL = status (see #03767)
Note:   same as INT 60/AH=12h
SeeAlso: AH=0Ch"10NET",INT 60/AH=12h

(Table 03767)
Values for 10NET status:
 00h    successful
 01h    semaphore currently locked
 02h    server not responding
 03h    invalid semaphore name
 04h    semaphore list is full
 05h    invalid drive ID
 06h    invalid Ethernet address
 07h    not logged in
 08h    write to network failed
 09h    semaphore already logged in this CPU
SeeAlso: #03740
Index:  error codes;10-Net|10-Net;error codes
--------N-6F0C-------------------------------
INT 6F - 10NET - UNLOCK SEMAPHORE
        AH = 0Ch
        AL = drive number or 0
        ES:SI = Ethernet address or 0
        DS:BX -> 31-byte ASCIZ semaphore name
Return: AL = status (see also #03767)
            01h semaphore not locked
Note:   same as INT 60/AH=13h
SeeAlso: AH=0Bh,INT 60/AH=13h
--------b-6F0C-------------------------------
INT 6F - HP Vectra EX-BIOS - "F_GET_BUFFER" - READ A BUFFER OF DATA FROM DEVICE
        AH = 0Ch
        BP = driver ID (see #03741) for V_HPHIL (0114h), others
        CX = number of bytes or blocks to read
        DS:SI -> buffer for received data
Return: AH = status (see #03744 at AH=00h"HP Vectra")
        BP,DS destroyed
SeeAlso: AH=08h"F_GET_BYTE",AH=0Ah"F_PUT_BUFFER",AH=0Ch"F_GET_BLOCK"
SeeAlso: AH=10h"F_GET_WORD"
--------b-6F0C-------------------------------
INT 6F - HP Vectra EX-BIOS - "F_GET_BLOCK" - READ BLOCKS OF DATA FROM DEVICE
        AH = 0Ch
        BP = driver ID (see #03741)
        DH = device major number
        DL = device minor number
        ES:DI -> command block (see #03766)
Return: AH = status (see #03744 at AH=00h"HP Vectra")
        BX = operation status
        BP,DS destroyed
SeeAlso: AH=08h"F_GET_BYTE",AH=0Ah"F_PUT_BLOCK",AH=0Ch"F_GET_BUFFER"
SeeAlso: AH=10h"F_GET_WORD"
--------b-6F0C--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_INS_FIXOWNDS" - INSTALL VALUES IN FIXED VECTOR
        AH = 0Ch
        BP = 0012h (driver ID for V_SYSTEM)
        BX = vector address used
        ES:DI -> new CS:IP entry point
Return: AH = status (00h) (see #03744)
        BP,DS destroyed
Note:   on installation, the given entry point will be invoked with an SF_INIT
          call (see AX=0200h"SF_INIT"), which should return the routine's DS
          in BX.  If the SF_INIT call returns with error code FEh, the power-on
          self-test sequence will be called.
SeeAlso: AH=00h"HP Vectra",AH=04h/BP=0012h,AH=06h/BP=0012h,AH=08h/BP=0012h
SeeAlso: AH=0Eh/BP=0012h,AH=12h/BP=0012h
--------b-6F0C--BP002A-----------------------
INT 6F - HP Vectra EX-BIOS - "F_INQUIRE_ENTRY" - GET GID DRIVER ENTRY POINT
        AH = 0Ch
        BP = 002Ah (driver ID for V_SINPUT)
Return: AH = status (see #03744)
        ES:BX -> physical GID driver CS:IP
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0400h/BP=002Ah,AH=06h/BP=002Ah,AH=08h/BP=002Ah
SeeAlso: AH=0Ah/BP=002Ah
--------b-6F0C--BP005A-----------------------
INT 6F - HP Vectra EX-BIOS - "F_SET_LIMITS_X" - SET HORIZONTAL TRACKING LIMITS
        AH = 0Ch
        BP = 005Ah (driver ID for V_STRACK)
        CX = minimum X coordinate
        DX = maximum X coordinate
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AH=04h/BP=005Ah,AH=08h/BP=005Ah,AH=0Eh/BP=005Ah
SeeAlso: AH=10h/BP=005Ah,AH=12h/BP=005Ah,INT 33/AX=0007h
--------N-6F0D-------------------------------
INT 6F - 10NET - "WHO" - ENUMERATE USERS ON NETWORK
        AH = 0Dh
        AL = type code
            01h return superstations only
            02h return non-superstations only
            otherwise return all
        CX = length of data buffer
        DS:DX -> array of records to be filled (see #03768)
Return: CL = number of records returned (responding stations)
SeeAlso: AH=16h,AH=8Dh

Format of station record:
Offset  Size    Description     (Table 03768)
 00h 12 BYTEs   node ID
 0Ch    BYTE    station flags (see #03769)
---if AL = 01h---
 0Dh    BYTE    version number
 0Eh    WORD    level number of 10Net software in responding node
---if AL = 02h---
 0Dh  8 BYTEs   user ID
 15h    BYTE    version number
 16h    WORD    level number

Bitfields for station flags:
Bit(s)  Description     (Table 03769)
 1      workstation
 2      superstation
 3      xgate
 4      active gate
--------N-6F0E-------------------------------
INT 6F - 10NET - SPOOL/PRINT
        AH = 0Eh
        DS:DX -> spool/print record (see #03771)
Return: CF clear if successful
        CF set on error
            AX = error code (see also #03740)
                17FFh device not mounted
                18FFh already spooling to named device

(Table 03770)
Values for 10NET spooler operation code:
 0000h  initiate spool
 0001h  abort print
 0002h  close spool
 0003h  delete spool
 0004h  print
 0005h  get report info
 0006h  set chat template
 0007h  queue
 0008h  return queue
 0009h  queue non-spooled file for printing

Format of 10NET Spool/Print record:
Offset  Size    Description     (Table 03771)
 00h    WORD    operation code (see #03770)
 02h 11 BYTEs   file name in FCB format
---if operation code = 00h or 06h---
 0Dh    BYTE    notification flags (see #03772)
 0Eh    BYTE    days to keep (FFh=forever)
 0Fh    BYTE    bits 0,1: device (1=LPT1)
                bits 4-7: remote drive to store spool file (1=A,...)
 10h    WORD    length of following data area
 12h  N BYTEs   up to 64 bytes of description
---if operation code = 03h---
 0Dh  8 BYTEs   user ID to associate with filename
---if operation code = 04h---
 0Dh    WORD    block number
 0Fh  8 BYTEs   user ID to associate with filename
---if operation code = 05h---
 0Dh    BYTE    RRN to start retrieve
 0Eh    BYTE    bits 0,1: local print device (LPTx)
                bit 3: if set, return entries for all users
 0Fh    WORD    length of following area
 11h  N BYTEs   up to 1500 bytes to receive $SCNTL records returned
---if operation code = 07h---
 0Dh    BYTE    queue number
 0Eh    BYTE    bits 0,1: local print device (LPTx)
 0Fh    WORD    number of bytes of test print to be done
 11h    BYTE    code:
                01h print device
                02h test print count
                03h prn
---if operation code = 08h---
 0Dh    BYTE    queue location or $SCNTL location to start access
                returns next item for access:
                    00h-7Fh queued items
                    80h-FEh non-queued, non-printed items
                    FFh no more items
 0Eh    WORD    unused
 10h    WORD    length of following area
 12h  N BYTEs   up to 64 bytes to receive $SCNTL records (see #03773)
---if operation code = 09h---
 0Dh  3 BYTEs   unused
 10h  N BYTEs   path to non-spooled file to be queued for printing

Bitfields for notification flags:
Bit(s)  Description     (Table 03772)
 7      queue to top
 6      do ID page
 5      no form feed
 4      reserved
 3      explicit queuing only
 2      notify at print completion
 1      notify server operator, with reply
 0      notify at print start

Format of 10NET $SCNTL record:
Offset  Size    Description     (Table 03773)
 00h  8 BYTEs   user ID
 08h 11 BYTEs   filename in FCB format
 13h  6 BYTEs   node ID
 19h  3 BYTEs   creation date
 1Ch    BYTE    notification flags (see #03772)
 1Dh    BYTE    retention time in days
 1Eh    BYTE    printing device (LPTx)
 1Fh  3 BYTEs   date last printed (0 = never)
 22h    BYTE    device containing spoolfile
 23h    WORD    bytes to print for test print
 25h    WORD    block number to start print
 27h    BYTE    reserved
--------b-6F0E-------------------------------
INT 6F - HP Vectra EX-BIOS - "F_PUT_WORD" - WRITE WORD OF DATA TO DEVICE
        AH = 0Eh
        BP = driver ID (see #03741)
        DX = data word
Return: AH = status (see #03744 at AH=00h"HP Vectra")
        BP,DS destroyed
SeeAlso: AH=06h"F_PUT_BYTE",AH=0Ah"F_PUT_BUFFER",AH=10h"F_GET_WORD"
--------b-6F0E-------------------------------
INT 6F - HP Vectra EX-BIOS - "F_PUT_WORD" - WRITE A WORD OF DATA
        AH = 0Eh
        BP = driver ID (see #03741)
        ??? details not yet available
Return: ???
SeeAlso: AH=06h"HP Vectra",AH=0Ah"HP Vectra",AH=10h"HP Vectra"
--------b-6F0E--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_INS_FIXGETDS" - INSTALL VALUES IN FIXED VECTOR
        AH = 0Eh
        BP = 0012h (driver ID for V_SYSTEM)
        BX = vector address used
        ES:DI -> new CS:IP entry point
Return: AH = status (00h) (see #03744)
        BP,DS destroyed
Note:   on installation, the given entry point will be invoked with an SF_INIT
          call (see AX=0200h"SF_INIT"), with the "last used DS" value in BX;
          the routine should adjust BX and return the new value.  If the
          SF_INIT call returns with error code FEh, the power-on self-test
          sequence will be called.
SeeAlso: AH=00h"HP Vectra",AH=04h/BP=0012h,AH=06h/BP=0012h,AH=0Ch/BP=0012h
SeeAlso: AH=10h/BP=0012h,AH=14h/BP=0012h
--------b-6F0E--BP005A-----------------------
INT 6F - HP Vectra EX-BIOS - "F_SET_LIMITS_Y" - SET VERTICAL TRACKING LIMITS
        AH = 0Eh
        BP = 005Ah (driver ID for V_STRACK)
        CX = minimum Y coordinate
        DX = maximum Y coordinate
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AH=04h/BP=005Ah,AH=08h/BP=005Ah,AH=0Ch/BP=005Ah
SeeAlso: AH=10h/BP=005Ah,AH=12h/BP=005Ah,INT 33/AX=0008h
--------N-6F0F-------------------------------
INT 6F - 10NET v5.0 - "RM LOCK" - ???
        AH = 0Fh
        ???
Return: ???
SeeAlso: AH=07h,AH=08h"10NET"
--------N-6F10-------------------------------
INT 6F - 10NET - ATTACH/DETACH PRINTER
        AH = 10h
        AL = subfunction
            00h initiate spooling if LPT1 is mounted
            01h terminate spooling if LPT1 is mounted
SeeAlso: INT 21/AX=5D08h
--------b-6F10-------------------------------
INT 6F - HP Vectra EX-BIOS - "F_GET_WORD" - READ WORD OF DATA FROM DEVICE
        AH = 10h
        BP = driver ID (see #03741)
Return: AH = status (see #03744 at AH=00h"HP Vectra")
        DX = data word
        BP,DS destroyed
SeeAlso: AH=08h"F_GET_BYTE",AH=0Ch"F_GET_BUFFER",AH=0Eh"F_PUT_WORD"
--------b-6F10--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_INS_FIXGLBDS" - INSTALL VALUES IN FIXED VECTOR
        AH = 10h
        BP = 0012h (driver ID for V_SYSTEM)
        BX = vector address used
        ES:DI -> new CS:IP entry point
Return: AH = status (00h) (see #03744)
        BP,DS destroyed
Note:   on installation, the given entry point will be invoked with an SF_INIT
          call (see AX=0200h"SF_INIT"), with BX set to the EX-BIOS global
          data area. If the SF_INIT call returns with error code FEh, the
          power-on self-test sequence will be called.
SeeAlso: AH=00h"HP Vectra",AH=04h/BP=0012h,AH=06h/BP=0012h
SeeAlso: AH=0Ch/BP=0012h,AH=0Eh/BP=0012h,AH=12h/BP=0012h,AH=16h/BP=0012h
--------b-6F10--BP005A-----------------------
INT 6F - HP Vectra EX-BIOS - "F_PUT_SPRITE" - DISPLAY GRAPHICS CURSOR SPRITE
        AH = 10h
        BP = 005Ah (driver ID for V_STRACK)
        BX = X coordinate
        CX = Y coordinate
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AH=04h"F_TRACK_INIT",AH=08h"F_TRACK_OFF"
SeeAlso: AH=12h"F_REMOVE_SPRITE",INT 33/AX=0004h
--------N-6F11-------------------------------
INT 6F - 10NET - LOCK FCB
        AH = 11h
        AL = mode
            01h sequential
            02h random
            03h random block
                CX = number of records
        DS:DX -> FCB (see #01345 at INT 21/AH=0Fh)
Return: CF clear if successful
        CF set on error
            AX = error code (see also #03740)
                0002h file not found
SeeAlso: AH=12h,INT 21/AH=0Fh
--------N-6F12-------------------------------
INT 6F - 10NET - UNLOCK FCB
        AH = 12h
        AL = mode
            00h sequential
            01h random
            02h random block
                CX = number of records
        DS:DX -> FCB (see #01345 at INT 21/AH=0Fh)
Return: CF clear if successful
        CF set on error
            AX = error code (see also #03740)
                0002h file not found
SeeAlso: AH=11h
--------b-6F12--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_INS_FREEOWNDS" - INSTALL VALUES IN FREE VECTOR
        AH = 12h
        BP = 0012h (driver ID for V_SYSTEM)
        ES:DI -> new CS:IP entry point
Return: AH = status (00h) (see #03744)
        BP,DS destroyed
Note:   on installation, the given entry point will be invoked with an SF_INIT
          call (see AX=0200h"SF_INIT"), which should return the routine's DS
          in BX.  If the SF_INIT call returns with error code FEh, the power-on
          self-test sequence will be called.
SeeAlso: AH=00h"HP Vectra",AH=04h/BP=0012h,AH=0Ch/BP=0012h,AH=14h/BP=0012h
SeeAlso: AH=16h/BP=0012h,AH=18h/BP=0012h
--------b-6F12--BP005A-----------------------
INT 6F - HP Vectra EX-BIOS - "F_REMOVE_SPRITE" - REMOVE GRAPHICS CURSOR SPRITE
        AH = 12h
        BP = 005Ah (driver ID for V_STRACK)
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AH=06h"F_TRACK_ON",AH=10h"F_PUT_SPRITE"
--------N-6F13-------------------------------
INT 6F - 10NET v3.3+ - GET REMOTE CONFIGURATION TABLE ADDRESS
        AH = 13h
        DS:DX -> node ID, 12 bytes blank-padded
Return: CF clear if successful
            ES:BX = configuration table address on given machine
        CF set on error
            AX = error code (see #03740)
SeeAlso: AH=03h
--------N-6F14-------------------------------
INT 6F - 10NET v3.3+ - GET REMOTE MEMORY
        AH = 14h
        BX:SI = address of remote memory
        CX = length (<=1024 bytes)
        DS:DX -> node ID, 12 bytes blank-padded
        DS:DI -> area to receive remote memory image
Return: CF clear if successful
            CX = amount of memory copied to DS:SI
        CF set on error
            AX = error code (see #03740)
--------b-6F14--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_INS_FREEGETDS" - INSTALL VALUES IN FREE VECTOR
        AH = 14h
        BP = 0012h (driver ID for V_SYSTEM)
        ES:DI -> new CS:IP entry point
Return: AH = status (00h) (see #03744)
        BP,DS destroyed
Note:   on installation, the given entry point will be invoked with an SF_INIT
          call (see AX=0200h"SF_INIT"), with the "last used DS" value in BX;
          the routine should adjust BX and return the new value.  If the
          SF_INIT call returns with error code FEh, the power-on self-test
          sequence will be called.
SeeAlso: AH=00h"HP Vectra",AH=04h/BP=0012h,AH=0Eh/BP=0012h,AH=12h/BP=0012h
SeeAlso: AH=16h/BP=0012h
--------N-6F1501-----------------------------
INT 6F - 10NET v3.3+ - GET SHARED DEVICE ENTRY
        AX = 1501h
        BX = zero-based index
        DS:SI -> node ID, 12 bytes blank-padded
        ES:DI -> 85-byte buffer for shared device table entry (see #03774)
Return: CF clear if successful
            ES:DI buffer contains shared device table entry of BXth device
        CF set on error
            AX = error code (see #03740)
SeeAlso: AX=1502h,AX=1503h,AX=9501h

Format of 10NET shared device table entry:
Offset  Size    Description     (Table 03774)
 00h  8 BYTEs   device
 08h  8 BYTEs   alias
 10h 64 BYTEs   path
 50h  8 BYTEs   password
 58h    BYTE    access
 59h  4 BYTEs   mask
--------N-6F1502-----------------------------
INT 6F - 10NET v3.3+ - SET SHARED DEVICE ENTRY
        AX = 1502h
        DS:SI -> node ID, 12 bytes blank-padded
        ES:DI -> valid shared device table entry
Return: CF clear if successful
        CF set on error
            AX = error code (see #03740)
SeeAlso: AX=1501h,AX=1503h,AX=9502h
--------N-6F1503-----------------------------
INT 6F - 10NET v3.3+ - DELETE SHARED DEVICE ENTRY
        AX = 1503h
        BX = zero-based index
        DS:SI -> node ID, 12 bytes blank-padded
Return: CF clear if successful
        CF set on error
            AX = error code (see #03740)
SeeAlso: AX=1501h,AX=1502h,AX=9503h
--------N-6F16-------------------------------
INT 6F - 10NET v5.0 - "GL WHO" - ???
        AH = 16h
        ???
Return: ???
SeeAlso: AH=0Dh
--------b-6F16--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_INS_FREEGLBDS" - INSTALL VALUES IN FREE VECTOR
        AH = 16h
        BP = 0012h (driver ID for V_SYSTEM)
        ES:DI -> new CS:IP entry point
Return: AH = status (00h) (see #03744 at INT 6F/AH=00h"HP Vectra")
        BP,DS destroyed
Note:   on installation, the given entry point will be invoked with an SF_INIT
          call (see AX=0200h"SF_INIT"), with BX set to the EX-BIOS global
          data area.  If the SF_INIT call returns with error code FEh, the
          power-on self-test sequence will be called.
SeeAlso: AH=00h"HP Vectra",AH=04h/BP=0012h,AH=10h/BP=0012h,AH=12h/BP=0012h
SeeAlso: AH=14h/BP=0012h,AH=18h/BP=0012h
--------N-6F17-------------------------------
INT 6F - 10NET v3.3+ - MOUNT
        AH = 17h
        AL = local drive number (0=A:)
        BL = remote drive letter or '1'..'3' for LPTn or '4' or '5' for COMx
        DS:DX -> node ID, 12 bytes blank-padded
Return: CF clear if successful
        CF set on error
            AX = error code (see #03740)
SeeAlso: AH=18h
--------N-6F18-------------------------------
INT 6F - 10NET v3.3+ - UNMOUNT
        AH = 18h
        AL = local drive number (0=A:)
        BL = type
            00h     disk
            01h-03h LPTn
            04h,05h COMx
Return: CF clear if successful
        CF set on error
            AX = error code (see #03740)
SeeAlso: AH=17h
--------b-6F18--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_INS_FIND" - FIND DRIVER BY ATTRIBUTES
        AH = 18h
        BP = 0012h (driver ID for V_SYSTEM)
        AL = sense of test (00h equal, 02h non-equal)
        BX = AND mask
        DX = pattern
        SI = first vector address to search
        DI = offset in HP header of field to test
Return: AH = status (00h,FEh) (see #03744 at INT 6F/AH=00h"HP Vectra")
        BP,DS destroyed
        ---if AH=00h---
        SI = first matching vector address
Desc:   compare successive drivers' header fields starting at address SI
          until the header field AND BX is either equal or non-equal to DX
SeeAlso: AH=00h"HP Vectra",AH=04h/BP=0012h,AH=0Ch/BP=0012h,AH=10h/BP=0012h
SeeAlso: AH=12h/BP=0012h,AH=16h/BP=0012h
--------N-6F19-------------------------------
INT 6F U - 10NET v5.0 - AUDIT
        AH = 19h
        ???
Return: ???
SeeAlso: AH=99h
--------N-6F1A-------------------------------
INT 6F U - 10NET v5.0 - "BULL" - ???
        AH = 1Ah
        ???
Return: ???
--------N-6F1B-------------------------------
INT 6F U - 10NET v5.0 - "GMOUNT" - ???
        AH = 1Bh
        ???
Return: ???
--------N-6F1C-------------------------------
INT 6F U - 10NET v5.0 - "GLOGIN" - GET LOGIN LIST
        AH = 1Ch
        ???
Return: ???
--------N-6F1D-------------------------------
INT 6F U - 10NET v5.0 - "TABDATA" - ???
        AH = 1Dh
        ???
Return: ???
--------N-6F1E-------------------------------
INT 6F U - 10NET v5.0 - "SCHED" - ???
        AH = 1Eh
        ???
Return: ???
--------b-6F1E--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_RAM_GET" - GET EX-BIOS FREE RAM AREA
        AH = 1Eh
        BP = 0012h (driver ID for V_SYSTEM)
Return: AH = status (00h) (see #03744 at INT 6F/AH=00h"HP Vectra")
        BX = last-used DS
        DX = maximum DS
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AH=04h/BP=0012h,AH=20h/BP=0012h,AH=22h/BP=0012h
--------N-6F1F-------------------------------
INT 6F U - 10NET v5.0 - "WHOAMI" - ???
        AH = 1Fh
        ???
Return: ???
--------N-6F20-------------------------------
INT 6F U - 10NET v5.0 - ???
        AH = 20h
        ???
Return: ???
--------b-6F20--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_RAM_RET" - RESERVE EX-BIOS MEMORY
        AH = 20h
        BP = 0012h (driver ID for V_SYSTEM)
        BX = new value for "last-used DS"
        DX = new value for "maximum DS"
Return: AH = status (00h) (see #03744 at INT 6F/AH=00h"HP Vectra")
        BP,DS destroyed
Note:   the F_INS_FIXGETDS and F_INS_FREEGETDS functions
          (see AH=0Eh/BP=0012h,AH=14h/BP=0012h) also modify the values returned
          by this call, requiring care if both methods are used to allocate
          memory
SeeAlso: AH=00h"HP Vectra",AH=0Eh/BP=0012h,AH=14h/BP=0012h,AH=1Eh/BP=0012h
--------N-6F21-------------------------------
INT 6F U - 10NET v5.0 - ???
        AH = 21h
        ???
Return: ???
--------N-6F22-------------------------------
INT 6F U - 10NET v5.0 - ???
        AH = 22h
        ???
Return: ???
--------b-6F22--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_CMOS_GET" - READ CMOS MEMORY
        AH = 22h
        BP = 0012h (driver ID of V_SYSTEM)
        BL = address of CMOS byte to read
Return: AH = status (see #03744 at AH=00h"HP Vectra")
        AL = byte read
        BP,DS destroyed
Note:   supported by ES, QS, and RS series HP Vectras
SeeAlso: AH=00h"HP Vectra",AH=1Eh/BP=0012h,AH=24h/BP=0012h
--------b-6F24--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_CMOS_RET" - WRITE CMOS MEMORY
        AH = 24h
        BP = 0012h (driver ID of V_SYSTEM)
        BL = address of CMOS byte to write
        AL = new value
Return: AH = status (see #03744)
        BP,DS destroyed
Note:   updates the CMOS checksum fields (both IBM-standard and HP checksums)
SeeAlso: AH=00h"HP Vectra",AH=22h/BP=0012h
--------b-6F2A--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_YIELD" - GIVE UP CPU TO OTHER TASKS
        AH = 2Ah
        BP = 0012h (driver ID of V_SYSTEM)
Return: AH = status (see #03744)
        BP,DS destroyed
Note:   this is a hook for multitasking systems
SeeAlso: AH=00h"HP Vectra",INT 15/AX=1000h,INT 2F/AX=1680h
--------b-6F30--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_SND_CLICK_ENABLE" - TURN ON KEYCLICKS
        AH = 30h
        BP = 0012h (driver ID of V_SYSTEM)
Return: AH = status (see #03744 at AH=00h"HP Vectra")
        BP,DS destroyed
Desc:   enables keyclicks and flushes any pending keyclicks
SeeAlso: AH=32h/BP=0012h,AH=34h/BP=0012h,AH=36h/BP=0012h
--------b-6F32--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_SND_CLICK_DISABLE" - TURN OFF KEYCLICKS
        AH = 32h
        BP = 0012h (driver ID of V_SYSTEM)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   disables keyclicks and flushes any pending keyclicks
SeeAlso: AH=00h"HP Vectra",AH=30h/BP=0012h,AH=38h/BP=0012h
--------b-6F34--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_SND_CLICK" - GENERATE KEYCLICK
        AH = 34h
        BP = 0012h (driver ID of V_SYSTEM)
Return: AH = status (see #03744)
        BP,DS destroyed
Desc:   generate a keyclick if fewer than four clicks are already pending
Note:   if keyclicks are already pending, the remaining click count is
          incremented and the function returns immediately
SeeAlso: AH=00h"HP Vectra",AH=30h/BP=0012h,AH=36h/BP=0012h,AH=3Ah/BP=0012h
--------b-6F36--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_SND_BEEP_ENABLE" - ENABLE BEEPS
        AH = 36h
        BP = 0012h (driver ID of V_SYSTEM)
Return: AH = status (see #03744 at AH=00h"HP Vectra")
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AH=30h/BP=0012h,AH=34h/BP=0012h,AH=38h/BP=0012h
--------b-6F38--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_SND_BEEP_DISABLE" - DISABLE BEEPS
        AH = 38h
        BP = 0012h (driver ID of V_SYSTEM)
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AH=32h/BP=0012h,AH=36h/BP=0012h
--------b-6F3A--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_SND_BEEP" - SOUND BEEP WITH CURRENT VALUES
        AH = 3Ah
        BP = 0012h (driver ID of V_SYSTEM)
Return: AH = status (see #03744 at AH=00h"HP Vectra")
        BP,DS destroyed
Desc:   make a sound of the frequency and duration defined in the EX-BIOS
          global data area (see #03748)
SeeAlso: AH=00h"HP Vectra",AH=34h/BP=0012h,AH=36h/BP=0012h,AH=38h/BP=0012h
SeeAlso: AH=3Ch/BP=0012h,AH=3Eh/BP=0012h
--------b-6F3C--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_SND_SET_BEEP" - SET BEEP FREQUENCY AND DURATION
        AH = 3Ch
        BP = 0012h (driver ID of V_SYSTEM)
        BX = frequency in Hz (1-25000, 0 = off)
        DX = duration in 10-microsecond increments
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AH=3Ah/BP=0012h,AH=3Eh/BP=0012h,#03748
--------b-6F3E--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_SND_TONE" - SOUND TONE WITH FREQ AND DURATION
        AH = 3Eh
        BP = 0012h (driver ID of V_SYSTEM)
        BX = frequency in Hz (1-25000, 0 = off)
        DX = duration in 10-microsecond increments
Return: AH = status (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AH=3Ah/BP=0012h,AH=3Ch/BP=0012h,AH=40h/BP=0012h
--------b-6F40--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_STR_GET_FREE_INDEX" - FIND FREE STRING INDEX
        AH = 40h
        BP = 0012h (driver ID of V_SYSTEM)
Return: AH = status (see #03744)
        BX = next free string index
        BP,DS destroyed
Desc:   get the next string index available to user programs
SeeAlso: AH=00h"HP Vectra",AH=42h/BP=0012h,AH=44h/BP=0012h,AH=46h/BP=0012h
--------b-6F42--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_STR_DEL_BUCKET" - DEL HEADER FROM BUCKET LIST
        AH = 42h
        BP = 0012h (driver ID of V_SYSTEM)
        ES:DI -> bucket header (see #03775)
Return: AH = status (00h,FEh) (see #03744 at AH=00h"HP Vectra")
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AH=40h/BP=0012h,AH=44h/BP=0012h

Format of HP Vectra EX-BIOS bucket header:
Offset  Size    Description     (Table 03775)
 00h    DWORD   pointer to next bucket header (FFFFh:FFFFh if last)
 04h    WORD    upper bound on string index
 06h    WORD    lower bound on string index
 08h    DWORD   pointer to array of string offset pointers
 0Ch    WORD    segment of strings
Note:   the strings pointed at by the offset pointers are byte-counted ASCIZ
          strings
--------b-6F44--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_STR_PUT_BUCKET" - ADD HEADER TO BUCKET HDR LIST
        AH = 44h
        BP = 0012h (driver ID of V_SYSTEM)
        ES:DI -> bucket header (see #03775)
Return: AH = status (00h) (see #03744)
        BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AH=42h/BP=0012h,AH=46h/BP=0012h
--------b-6F46--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_STR_GET_STRING" - FIND STRING IN BUCKET LIST
        AH = 46h
        BP = 0012h (driver ID of V_SYSTEM)
        BX = string index
Return: AH = status (00h,other) (see #03744)
        BP,DS destroyed
        ---if successful---
        CX = length of string (excluding count byte and terminating NUL)
        DS:SI -> header for string
        ES:DI -> found string
SeeAlso: AH=00h"HP Vectra",AH=44h/BP=0012h,AH=48h/BP=0012h
--------b-6F48--BP0012-----------------------
INT 6F - HP Vectra EX-BIOS - "F_STR_GET_INDEX" - GET INDEX FOR STRING
        AH = 48h
        BP = 0012h (driver ID of V_SYSTEM)
        ES:DI -> ASCIZ string
Return: AH = status (00h,other) (see #03744 at AH=00h"HP Vectra")
        BP,DS destroyed
        ---if successful---
        BX = index for the given string
SeeAlso: AH=00h"HP Vectra",AH=40h/BP=0012h,AH=46h/BP=0012h
--------A-6F636FBX6D70-----------------------
INT 6F - Clara Empricost - TSR Version - INSTALLATION CHECK
        AX = 636Fh ('co')
        BX = 6D70h ('mp')
        CX = 696Eh ('in')
        SS:DX -> WORD to set if installed
Return: SS:DX word set to 636Fh if installed
Program: Condition List Action Rejection Algorithm for the Evaluation
          of Music at Pseudo-Random Idea COnstruction STage
          (CLARA EMPRICOST) is an experimental program by Silas Brown
SeeAlso: AX=636Fh/BX=6D70h"UNINSTALL"
--------A-6F636FBX6D70-----------------------
INT 6F - Clara Empricost - TSR Version - UNINSTALL
        AX = 636Fh ('co')
        BX = 6D70h ('mp')
        CX = 6F73h ('os')
Return: nothing -- call installation check to determine whether successful
Program: Condition List Action Rejection Algorithm for the Evaluation
          of Music at Pseudo-Random Idea COnstruction STage
          (CLARA EMPRICOST) is an experimental program by Silas Brown
Notes:   Saves any unfinished task and prevents processing of
           new tasks, even if can't uninstall
         If INT 28h or INT 6Fh have been chained since installation,
           returns without changing interrupts or freeing memory
         do not call while DOS is active (i.e. InDOS flag is nonzero or INT 28
           is active and InDOS > 1)
SeeAlso: AX=636Fh/BX=6D70h"INSTALLATION CHECK"
--------N-6F80-------------------------------
INT 6F - 10NET v5.0 - LOGIN
        AH = 80h
        DS:DX -> login record (see #03776)
Return: CF clear if successful
            BL = number of days until password expires (00h = never)
            CL = security level
        CF set on error
            AX = status (see #03740)
SeeAlso: AH=00h,AH=81h

Format of 10NET login record:
Offset  Size    Description     (Table 03776)
 00h  8 BYTEs   user name
 08h  8 BYTEs   password
 10h 15 BYTEs   server node ID
 1Fh  8 BYTEs   new password
 27h    BYTE    invoke mode (00h command line, 01h interactive)
--------N-6F81-------------------------------
INT 6F - 10NET v5.0 - LOGOUT
        AH = 81h
        DS:DX -> server node ID (DX=0000h for universal logout)
Return: AX = status (see #03740)
SeeAlso: AH=01h,AH=80h
--------N-6F8A-------------------------------
INT 6F - 10NET v5.0 - CHAT
        AH = 8Ah
        DS:BX -> chat parameters (see #03777)
        DS:DX -> chat message (see #03778)
Return: CF clear if successful
        CF set on error
            AX = status (see #03740)
SeeAlso: AH=0Ah"10NET"

Format of 10NET chat parameters:
Offset  Size    Description     (Table 03777)
 00h  8 BYTEs   sender's user name
 08h  8 BYTEs   destination user name
 10h 15 BYTEs   destination node (0 if broadcast-style chat)

Format of 10NET chat message:
Offset  Size    Description     (Table 03778)
 00h    WORD    message length
 02h  N BYTEs   chat message contents
--------N-6F8D-------------------------------
INT 6F - 10NET v5.0 - "WHO" - ENUMERATE USERS ON NETWORK
        AH = 8Dh
        BX = service mask (see #03779)
        CX = length of buffer
        DS:DX -> buffer for array of Who data structures (see #03780)
Return: CF clear if successful
            CX = number of nodes matching service mask
            DS:DX buffer filled
        CF set on error
            AX = status (see #03740)
SeeAlso: AH=0Dh

Bitfields for 10NET service mask:
Bit(s)  Description     (Table 03779)
 0      workstation
 1      file server
 2      print server
 3      de-spool server

Format of 10NET Who data structure:
Offset  Size    Description     (Table 03780)
 00h  8 BYTEs   user name
 08h 15 BYTEs   node ID
 17h  3 BYTEs   unique portion of Ethernet address
 1Ah    BYTE    Who group number
 1Bh    WORD    service mask (see #03779)
 1Dh    DWORD   serial number
 21h    BYTE    maximum concurrent users with same serial number allowed on net
 22h    BYTE    chat mask (see #03781)
 23h    BYTE    internal system bits (see #03782)
 24h  9 BYTEs   version number in format MM.mm.xxx
 2Dh    BYTE    number of shared directories
 2Eh    BYTE    number of shared printer queues

Bitfields for 10NET chat mask:
Bit(s)  Description     (Table 03781)
 0      chat permitted
 1      bell enabled
 2      chat keyboard initiated
 3      in INT 16 handler
 4      in Get Input
 5      display has timed out
 6      chat is idle

Bitfields for 10NET internal system bits:
Bit(s)  Description     (Table 03782)
 0      submit permitted
 1      submit initiated
 2      submit executing
 3      internal client call/chat/spool/autospool
 4      in spool termination
 5      print permitted
 6      waiting for keyboard input
--------N-6F9501-----------------------------
INT 6F - 10NET v5.0 - GET SHARED DEVICE ENTRY
        AX = 9501h
        BX = zero-based index
        DS:SI -> server's node ID
        ES:DI -> buffer for shared device structure (see #03783)
Return: CF clear if successful
        CF set on error
            AX = status (see #03740)
SeeAlso: AX=1501h,AX=9502h,AX=9503h,AX=9504h

Format of 10NET shared device structure:
Offset  Size    Description     (Table 03783)
 00h  8 BYTEs   alias
 08h    BYTE    type (02h modem, 03h print queue, 04h directory)
 09h    BYTE    access rights
                bit 0: read
                bit 1: write
                bit 2: create
 0Ah  8 BYTEs   password
 12h 32 BYTEs   comment
---directory---
 32h 64 BYTEs   pathname of shared directory
---print queue---
 32h    BYTE    notification bit mask (see #03784)
 33h    BYTE    job control bit mask (see #03785)
 34h    WORD    number of days to retain file
 36h    WORD    test print length
 38h    BYTE    number of copies to print
 39h    BYTE    compression algorithm
 3Ah    BYTE    tab width (00h = don't expand)
 3Bh    BYTE    priority
 3Ch    WORD    time to open queue (FFFFh = always)
 3Eh    WORD    time to close queue
 40h    WORD    pause following queue switch, in clock ticks
 42h    WORD    pause between print jobs, in clock ticks
 44h    BYTE    associate queue file existence mask
                bit 0: queue switch file exists
                bit 1: initiate file exists
                bit 2: abort file exists
 45h  6 BYTEs   character sequence for page eject
 4Bh    BYTE    status of print queue
                bit 0: queue is closed
 4Ch    WORD    number of jobs on queue
 4Eh    WORD    offset of next print job to be dispatched (FFFFh = none)
 50h    BYTE    number of print devices in printer pool
 51h    WORD    offset of first print device structure (FFFFh if empty)

Bitfields for notification flags:
Bit(s)  Description     (Table 03784)
 0      user at print start
 1      operator at start, with reply
 2      user at print completion
 3      operator at completion, with reply
 4      user on queue switch
 5      operator on queue switch, with reply
 6      user on print error

Bitfields for 10NET job control mask:
Bit(s)  Description     (Table 03785)
 0      print banner page
 1      eject page at end of job
 2      mark as "held" (queue but don't print)
 3      rush job (queue at top)
 4      overwrite file with zeros before deletion
 5      hyperspool if possible
--------N-6F9502-----------------------------
INT 6F - 10NET v5.0 - SET SHARED DEVICE ENTRY
        AX = 9502h
        DS:SI -> server's node ID
        ES:DI -> shared device structure (see #03783)
Return: CF clear if successful
        CF set on error
            AX = status (see #03740)
SeeAlso: AX=1502h,AX=9501h,AX=9503h,AX=9504h
--------N-6F9503-----------------------------
INT 6F - 10NET v5.0 - DELETE SHARED DEVICE
        AX = 9503h
        BX = zero-based index
        DS:SI -> server's node ID
Return: CF clear if successful
        CF set on error
            AX = status (see #03740)
SeeAlso: AX=1503h,AX=9501h,AX=9502h,AX=9504h
--------N-6F9504-----------------------------
INT 6F - 10NET v5.0 - ENUMERATE USERS OF SHARED DEVICE
        AX = 9504h
        BX = zero-based shared device index
        CX = zero-based user index
        DS:SI -> server's node ID
Return: CF clear if successful
            ES:DI -> node ID of the CX'th user of the BX'th device
        CF set on error
            AX = status (see #03740)
SeeAlso: AX=9501h,AX=9502h,AX=9503h
--------N-6F99-------------------------------
INT 6F - 10NET v5.0 - AUDIT
        AH = 99h
        DS:SI -> server's node ID
        ES:DI -> data to be appended to audit trail file (max 106 bytes)
Return: CF clear if successful
        CF set on error
            AX = status (see #03740)
SeeAlso: AH=19h,AH=9Ch
--------N-6F9C-------------------------------
INT 6F - 10NET v5.0 - GET LOGIN LIST
        AH = 9Ch
        BX = zero-based index
Return: CF clear if successful
            DS:DI -> BX'th node ID that caller's machine is logged into
        CF set on error
            AX = status (see #03740)
--------H-70---------------------------------
INT 70 C - IRQ8 - CMOS REAL-TIME CLOCK
Desc:   this interrupt is called when the real-time clock chip generates an
          alarm or periodic interrupt, among others.  The periodic interrupt
          occurs 1024 times per second.
Notes:  many BIOSes turn off the periodic interrupt in the INT 70h handler
          unless in an event wait (see INT 15/AH=83h,INT 15/AH=86h).
        may be masked by setting bit 0 on I/O port A1h
SeeAlso: INT 08,INT 0F"HP 95LX",INT 15/AH=01h"Amstrad",INT 15/AH=83h
SeeAlso: INT 15/AH=86h,INT 1A/AH=02h,INT 58"DESQview",MEM FEE00320h
SeeAlso: MEM 0040h:006Bh
--------v-70---------------------------------
INT 70 - VIRUS - "Stupid" - ORIGINAL INT 21h VECTOR
Note:   the virus sets this interrupt to be the same as INT 21, and then
          performs only INT 70 calls; since INT 70 is also generated by the
          real-time clock on the PC/AT and higher, this could cause random
          actions on an infected system
SeeAlso: INT 6B"VIRUS",INT 9E"VIRUS",INT E0"VIRUS"
--------H-71---------------------------------
INT 71 C - IRQ9 - REDIRECTED TO INT 0A BY BIOS
Notes:  may be masked by setting bit 1 on I/O port A1h
        the default BIOS handler invokes INT 0A for compatibility, since the
          pin for IRQ2 on the PC expansion bus became the pin for IRQ9 on the
          AT expansion bus.
        under DESQview, only the INT 15h vector and BASIC segment address (the
          word at 0000h:0510h) may be assumed to be valid for the handler's
          process
SeeAlso: INT 0A"IRQ2",INT 59"IRQ9",MEM 0040h:006Bh
--------H-72---------------------------------
INT 72 C - IRQ10 - RESERVED
Note:   may be masked by setting bit 2 on I/O port A1h
SeeAlso: INT 5A"IRQ10",MEM 0040h:006Bh
--------H-73---------------------------------
INT 73 C - IRQ11 - RESERVED
Note:   may be masked by setting bit 3 on I/O port A1h
SeeAlso: INT 5B"IRQ11",MEM 0040h:006Bh
--------H-74---------------------------------
INT 74 C - IRQ12 - POINTING DEVICE (PS)
Notes:  may be masked by setting bit 4 on I/O port A1h
        under DESQview, only the INT 15h vector and BASIC segment address (the
          word at 0000h:0510h) may be assumed to be valid for the handler's
          process
SeeAlso: INT 33/AX=0000h,INT 33/AX=0024h,INT 5C"NetBIOS",MEM 0040h:006Bh
--------H-75---------------------------------
INT 75 C - IRQ13 - MATH COPROCESSOR EXCEPTION (AT and up)
Desc:   redirected to INT 02 by the BIOS, for compatibility with the PC
Notes:  may be masked by setting bit 5 on I/O port A1h
        not all clones wire the coprocessor to generate this IRQ; some systems
          generate an NMI (see INT 02) or assert the -ERROR pin on the CPU
          (see INT 10"COPROCESSOR")
        under DESQview, only the INT 15h vector and BASIC segment address (the
          word at 0000h:0510h) may be assumed to be valid for the handler's
          process
SeeAlso: INT 10"COPROCESSOR",INT 5D"IRQ13",MEM 0040h:006Bh
--------H-76---------------------------------
INT 76 C - IRQ14 - HARD DISK CONTROLLER OPERATION COMPLETE (AT and later)
Notes:  may be masked by setting bit 6 on I/O port A1h
        on the PS/2, this interrupt is designed to be shared with other
          devices that produce an operation-complete interrupt, though
          the only current user is the hard disk
SeeAlso: INT 0E"IRQ6",INT 15/AH=91h,INT 5E"IRQ14",MEM 0040h:006Bh
--------H-77---------------------------------
INT 77 C - IRQ15 - RESERVED (AT,PS)
Note:   may be masked by setting bit 7 on I/O port A1h
SeeAlso: INT 5F"IRQ15",MEM 0040h:006Bh
--------H-77---------------------------------
INT 77 C - IRQ15 - SECONDARY IDE CONTROLLER - OPERATION COMPLETE
Note:   may be masked by setting bit 7 on I/O port A1h
SeeAlso: INT 5F"IRQ15",MEM 0040h:006Bh
--------H-77---------------------------------
INT 77 C - IRQ15 - POWER CONSERVATION (Compaq SLT/286)
Note:   may be masked by setting bit 7 on I/O port A1h
SeeAlso: INT 15/AX=4600h,INT 5F"IRQ15"
--------E-78---------------------------------
INT 78 - UofSalford DBOS DOS extender - API
        AH = function
            00h (PB) display 32-bit memory specified by command argument
            01h (PT) display 32-bit instruction(s) specified by command arg
            02h specify offset to subsequent PB and PT commands
            03h switch to protected mode
                DWORD following INT instruction point to map; protected-mode
                          entry point is immediately following the DWORD
                Return: never
                Note:   if bit 31 of the map address is set, only a stub was
                          loaded by DOS and DBOS will load the entire program
            04h specify that subsequent load (AH=03h) should leave program in
                  memory
            05h release program from memory
            06h set break point at address and option count from commandline
            07h resume program execution
            08h single-step program
            09h set read/write breakpoint using 386 debug registers
            0Ah set write breakpoint using 386 debug register
            0Bh set memory byte to new value
            0Ch display CPU registers
            0Dh run until specified program address reached
            0Fh print trace from program map
            10h specify an offset using a map symbol
            14h print memory without any offset
            18h switch DBOS into/out of test mode (ON/OFF commandline args)
            1Dh get address of real/protected-mode communication buffer
                Return: ES:BP -> comm buffer
            1Eh set real-mode memory size (specify how much real-mode memory
                  to leave free when running FTN77 programs)
            22h uninstall DBOS
            24h force DBOS to emulate coprocessor instructions
            26h set named DBOS switches from commandline
            27h reset named DBOS switched from commandline
            2Ah set list of dynamic link libraries to contents of commandline
                  file
            35h specify that subsequent load (AH=03h) should stop at first
                  instruction
Return: ???
Notes:  DBOS supports functions 00h through 50h; many of these functions
          provide a low-level debugging interface
        command arguments are read from the calling program's PSP
SeeAlso: INT 79"DBOS"
Index:  uninstall;DBOS DOS extender
--------E-78---------------------------------
INT 78 - DJGPP GO32.EXE DOS EXTENDER - RELOCATED IRQ0
Program: GO32.EXE is a DOS extender included as part of the 80386 port of the
          GNU C/C++ compiler by DJ Delorie and distributed as DJGPP
Notes:  this vector is overwritten when GO32 starts but is not restored by
          early versions of the extender
        the newest versions of GO32 dynamically allocate the vectors used
          for the relocated IRQs, much as DESQview does (see INT 50"DESQview")
SeeAlso: INT 08,INT 10/AH=FFh"GO32",INT 79"GO32"
--------A-78---------------------------------
INT 78 R - AutoCAD Device Interface - PLOTTER - SEND COMMAND
        AX = function
            0001h begin plot
                BX = file level
                    0000h ASCII file
                    0001h binary file
                    0002h AutoCAD DXB file
                    0003h installed ADI driver
            0002h end plot (close plotter)
            0003h move (pen up)
                BX = new X position
                CX = new Y position
            0004h move (pen down)
                BX = new X position
                CX = new Y position
            0005h select pen
                BX = pen number
            0006h select drawing speed
                BX = drawing speed N
            0007h select line style
                BX = line style N
            0008h raise pen
            0009h abort plot
Return: AX = 0000h (may be used for driver status in future releases)
SeeAlso: INT 79"AutoCAD",INT 7A/AX=0001h"AutoCAD",INT 7B/AX=8001h"AutoCAD"
--------d-78---------------------------------
INT 78 - ADP-60 IDE controller - ORIGINAL INT 13
SeeAlso: INT 79"ADP-60"
--------s-78-------------------------------
INT 78 - ULTRAMID - API
        AX = function
        --- digital functions ---
            0000h start digital
                ES:DI -> Sound Structure
                Return: AX = voice used
            0001h play next buffer
                ES:DI -> Sound Structure
            0002h set panning
                BX = pan
                CX = voice
            0003h set volume
                BX = volume
                CX = voice
            0004h set rate (not yet implemented)
            0005h pause digital
                CX = voice
            0006h restart digital
                CX = voice
            0007h stop digital
                CX = voice
            0008h get digital position
                CX = voice
                Return: AX:DX -> position in PC buffer
            0009h get voice status (not yet implemented)
        --- MIDI functions ---
            000Ah load MIDI patches
                ES:DI -> MIDI track just after the Mtrk header
                BX:DX = length of MIDI track
            000Bh load XMIDI patches
                ES:DI -> event buffer including the EVNT header
            000Ch load patch
                CX = MIDI number of patch
            000Dh unload patch
                CX = MIDI number of patch
            000Eh start sequence
            000Fh unload all patches
            0010h MIDI out byte
                CX = MIDI byte
            0011h MIDI out string
                CX = length
                ES:DI -> string of MIDI data
            0012h all notes off
        --- resource functions ---
            0013h allocate memory
                BX:DX = size of GUS memory needed
                Return: AX:DX = address of memory, or 0000:0000 if not avaiable
            0014h free memory
                BX:DX = address of memory to be freed
            0015h uninstall
            0016h sem enter
            0017h sem leave
            0018h add external semaphore
                BX:DX -> external semaphore
            0019h clear external semaphore
                BX:DX -> external semaphore
            001Ah application start
            001Bh application end
        --- v1.12 ---
            001Ch ???
            001Dh ???
            001Eh ???
            001Fh ???
Program: UltraMid is a TSR from Advanced Gravis to play MIDI and digital data
           through the Gravis UltraSound (GUS)
InstallCheck:   test for the signature "ULTRAMID" at offset 0103h in the
          interrupt handler's segment
Range:  INT 78 to INT 7F
SeeAlso: INT 2F/AX=CD00h"ULTRAMID",INT 7E/AH=00h"SBOS",INT 7E/AX=00FEh"SBOS"
Index:  uninstall;UltraMID
--------d-7800-------------------------------
INT 78 - TARGA.DEV - CMC International SCSI device driver - SET I/O PORT
        AH = 00h
        DX = interface board I/O port
Return: CF set on error
            AL = error code (see #03786)
InstallCheck:   (used by TARGA.DEV) test for the string "SCSI" at offset 03h
          into the interrupt handler
Note:   if this routine is not called, the port is the driver's default
          (usually 0280h or 0300h)
SeeAlso: AH=01h,AH=02h
Index:  installation check;TARGA.DEV

(Table 03786)
Values for TARGA.DEV error code:
 00h    illegal command given to SCSI code
 01h    invalid I/O port specified (must be from 100H to 3F8H, and must be on
          an 8-port boundary)
 02h    invalid DMA channel specified (must be from 1 to 3)
 03h    invalid SCSI board number specified (must be from 0 to 7)
 04h    error from data register test during self-test
 05h    SCSI input signals not all 0 when SCSI RST activated
 06h    SCSI input signals not all 0 before selecting a SCSI device
 07h    BSY signal is active; SCSI bus is busy
 08h    SCSI board not selected, BSY signal did not come on in response to
          raising SEL
 09h    time-out waiting for status state, signifying end of DMA transfer
--------E-780000-----------------------------
INT 78 - HugeRealMode Driver - INSTALLATION CHECK
        AX = 0000h
Return: AX = DBCAh if installed
Program: the HugeRealMode driver was published in the German DOS Extra Nr. 20
          (1992), and makes a 4G flat address space (for both data and code)
          available to real-mode DOS programs
SeeAlso: AX=0001h
--------E-780001-----------------------------
INT 78 - HugeRealMode Driver - GET ENTRY POINT
        AX = 0001h
Return: ES:BX -> far call entry point (see #03788,#03803)
SeeAlso: AX=0000h

(Table 03787)
Values for HugeRealMode Server error code:
 00h    successful
 01h    unknown function
 02h    A20 disabled
 03h    A20 enabled
 04h    memory allocation error
 05h    memory not fixeable (LOCK)
 06h    memory not deallocaable
 07h    memory not moveable (UNLOCK)
 08h    change in memory allocation size not possible
 09h    file error (with .XMF-file)
 0Ah    memory error (with .XMF-file)
 0Bh    unknown procedure (currently Turbo Pascal unit only)

(Table 03788)
Call HugeRealMode Server "Enable A20" function with:
        AL = 00h
Return: AX = error code (see #03787)
Note:   The HugeRealMode Server requires an XMS-driver like HIMEM.SYS loaded
          before HUGEREAL (for XMS-memory allocation and A20 control). It
          utilizes some undocumented 386+ features to enable 4G code and data
          segments (flat memory model) in the CPUs real-mode. It is not
          compatible with V86-mode (as with most EMM386). For maximum speed
          and compatibility with DOS it uses a two stage interrupt model
          (see #03791)
SeeAlso: #03789,#03790,#03791

(Table 03789)
Call HugeRealMode Server "Disable A20" function with:
        AL = 01h
Return: AX = error code (see #03787)
SeeAlso: #03788,#03790

(Table 03790)
Call HugeRealMode Server "Query A20 State" function with:
        AL = 02h
Return: AX = A20 state (0000h disabled, 0001h enabled)
SeeAlso: #03788,#03789

(Table 03791)
Call HugeRealMode Server "Enable Two-Stage Interrupt Model" function with:
        AL = 03h
Return: AX = error code (see #03787)
Notes:  If the two stage interrupt model is disabled, the IP must stay below
          1MB, because the high word of EIP is not saved correctly by the
          standard interrupt management in real mode.  Routines in extended
          memory may only be called with interrupts disabled (only usable for
          very short routines).
        If the two stage interupt model is enabled, these conventions are not
          required.  The outer (transparent) ISRs save the higher word of EIP
          in the high word of CR3 (possible modification: in memory, if this
          is not safe) and then invoke the standard ISRs.
        Because of this handling, one should use pseudo segmented code even in
          extended memory (64K blocks located on 64K boundaries) to avoid the
          misalignment of the saved EIP (in CR3). Another way is to track and
          realign CR3 each time when jumping over a 64K boundary in extended
          memory
SeeAlso: #03788,#03792

(Table 03792)
Call HugeRealMode Server "Disable Two-Stage Interrupt Model" function with:
        AL = 04h
Return: AX = error code (see #03787)
SeeAlso: #03788,#03791

(Table 03793)
Call HugeRealMode Server "Get Segment Address Of Server-Management Range" with:
        AL = 05h
Return: AX = error code (see #03787)
        ES = segment address
SeeAlso: #03803

(Table 03794)
Call HugeRealMode Server "Allocate Memory" function with:
        AL = 06h
        DX = length in KB
Return: AX = error code (see #03787)
        DX = handle
        EBX = start address of allocated block
SeeAlso: #03795,#03796

(Table 03795)
Call HugeRealMode Server "Deallocate Memory" function with:
        AL = 07h
        DX = handle
Return: AX = error code (see #03787)
SeeAlso: #03794,#03796

(Table 03796)
Call HugeRealMode Server "Modify Allocated Memory Size" function with:
        AL = 08h
        DX = handle
        BX = new size in KB
Return: AX = error code (see #03787)
        EBX = new address
SeeAlso: #03794,#03795

(Table 03797)
Call HugeRealMode Server "Load .XMF-file" function with:
        AL = 09h
        ES:BX -> filename (see #03798)
Return: AX = error code (see #03787)
        ECX = target address
Notes:  memory must be allocated before loading
        .XMF file format (eXtended Memory executable File format) is supported
          by the HugeRealMode server for easier handling of XMS-code.
        The utility CONFXMF converts .OBJ-files (.COM 'tiny' model) to
          .XMF-format
SeeAlso: #03794

Format of .XMF program file header:
Offset  Size    Description     (Table 03798)
 00h    DWORD   signature "XMF_"
 04h    WORD    length of programs code
 06h    WORD    count of 32bit addresses to relocate
 08h    WORD    offset to code start (releative to file start) (see #03799)
 0Ah    WORD    relocation table
Note:   each word contains a 16bit address, where a relocation has to be
          performed
SeeAlso: #03797,#03799

Format of .XMF-file code header:
Offset  Size    Description     (Table 03799)
 00h    WORD    count of exported functions
 02h  N PWORDs  48bit pointers (16bit segment+32bit offset) to each function
                (16bit segment is always zero)
 var            start of program's code
SeeAlso: #03797,#03798

(Table 03800)
Call HugeRealMode Server "Set Segment Limits" function with:
        AL = 0Ah
        BL = segment limits (see #03801)
Return: AX = error code (see #03787)
SeeAlso: #03793

Bitfields for HugeRealMode Server segment limits:
Bit(s)  Description     (Table 03801)
 7      CS size: 1=4GB, 0=64KB
 6-5    not used
 4      SS size: 1=4GB, 0=64KB
 3      GS size
 2      FS size
 1      ES size
 0      DS size
SeeAlso: #03800

(Table 03802)
Call HugeRealMode Server "Transfer Memory From DOS To XMS" function with:
        AL = 0Bh
        ES:SI = source address
        EDI = target address
        ECX = length
Return: AX = error code
SeeAlso: #03803

(Table 03803)
Call HugeRealMode Server "Transfer Memory From XMS To DOS" function with:
        AL = 0Ch
        ESI = source address
        ES:DI = target address
        ECX = length
Return: AX = error code
SeeAlso: #03802
--------d-7801-------------------------------
INT 78 - TARGA.DEV - GET I/O PORT
        AH = 01h
Return: DX = current interface board I/O port
SeeAlso: AH=00h,AH=03h"TARGA"
--------d-7802-------------------------------
INT 78 - TARGA.DEV - SET DMA CHANNEL
        AH = 02h
        AL = interface board DMA channel
Return: CF set on error
        AL = error code (see #03786)
Note:   if this routine is not called, the DMA channel is the driver's default
          (usually 3)
SeeAlso: AH=00h,AH=03h"TARGA"
--------d-7803-------------------------------
INT 78 - TARGA.DEV - GET DMA CHANNEL
        AH = 03h
Return: AL = current interface board DMA channel
SeeAlso: AH=01h,AH=02h
--------d-7804-------------------------------
INT 78 - TARGA.DEV - SET SCSI DEVICE NUMBER
        AH = 04h
        AL = SCSI device number
Return: CF set on error
        AL = error code (see #03786)
Note:   if this routine is not called, the device number used is the driver's
          default (usually 0)
SeeAlso: AH=02h,AH=05h
--------d-7805-------------------------------
INT 78 - TARGA.DEV - GET SCSI DEVICE NUMBER
        AH = 05h
Return: AL = current SCSI device number
SeeAlso: AH=03h"TARGA",AH=04h
--------d-7806-------------------------------
INT 78 - TARGA.DEV - SET/CLEAR EARLY RETURN MODE
        AH = 06h
        AL = new state
            00h clear early return mode
            01h set early return mode
Note:   if early return mode is set then SCSI will return with no errors
          when the last DMA transfer is started in a call with AH=13h or AH=14h
        if this routine is not called, early return mode is cleared
SeeAlso: AH=13h,AH=14h,AH=15h
--------d-7808-------------------------------
INT 78 - TARGA.DEV - INTERFACE BOARD SELF-TEST
        AH = 08h
Return: CF set on error
        AL = error code (see #03786)
Note:   the SCSI bus is also reset
SeeAlso: AH=09h
--------d-7809-------------------------------
INT 78 - TARGA.DEV - RESET SCSI BUS
        AH = 09h
Return: AL = error code if carry set (see #03786)
SeeAlso: AH=08h
--------d-7810-------------------------------
INT 78 - TARGA.DEV - SEND SCSI COMMAND
        AH = 10h
        DS:SI -> command bytes (see #03804)
Return: AH = SCSI status byte
        CF clear if successful
            AL = SCSI message byte
        CF set on error
            AL = error code (see #03786)
SeeAlso: AH=11h,INT 21/AX=4403h"ST-01"

Format of SCSI Command:
Offset  Size    Description     (Table 03804)
 00h    BYTE    length of command
 01h    ???     command bytes
--------d-7811-------------------------------
INT 78 - TARGA.DEV - SEND SCSI COMMAND, RECEIVE DATA (PROGRAMMED I/O)
        AH = 11h
        DS:SI -> command bytes (see #03805)
        ES:BX -> data storage area
        CX = number of data bytes to transfer
Return: AH = SCSI status byte
        CF clear if successful
            AL = SCSI message byte
        CF set on error
            AL = error code (see #03786)
Note:   this command receives data internally one byte at a time
SeeAlso: AH=10h,AH=13h

Format of TARGA.DEV SCSI Command:
Offset  Size    Description     (Table 03805)
 00h    BYTE    length of command
 01h    ???     command bytes
--------d-7812-------------------------------
INT 78 - TARGA.DEV - SEND SCSI COMMAND AND DATA (PROGRAMMED I/O)
        AH = 12h
        DS:SI -> command bytes (see #03806)
        ES:BX -> data storage area
        CX = number of data bytes to transfer
Return: AH = SCSI status byte
        CF clear if successful
            AL = SCSI message byte
        CF set on error
            AL = error code (see #03786)
Note:   this command sends data internally one byte at a time
SeeAlso: AH=14h

Format of TARGA.DEV SCSI Command:
Offset  Size    Description     (Table 03806)
 00h    BYTE    length of command
 01h    ???     command bytes
--------d-7813-------------------------------
INT 78 - TARGA.DEV - SEND SCSI COMMAND, RECEIVE DATA (DMA)
        AH = 13h
        DS:SI -> command bytes (see #03807)
        ES:BX -> data storage area
        DX:CX = number of data bytes to transfer
Return: AH = SCSI status byte (if early return mode is clear)
        CF clear if successful
            AL = SCSI message byte (if early return mode is clear)
        CF set on error
            AL = error code (see #03786)
Note:   this command receives data using DMA
SeeAlso: AH=11h,AH=12h

Format of TARGA.DEV SCSI Command:
Offset  Size    Description     (Table 03807)
 00h    BYTE    length of command
 01h    ???     command bytes
--------d-7814-------------------------------
INT 78 - TARGA.DEV - SEND SCSI COMMAND AND DATA (DMA)
        AH = 14h
        DS:SI -> command bytes (see #03808)
        ES:BX -> data storage area
        DX:CX = number of data bytes to transfer
Return: AH = SCSI status byte (if early return mode is clear)
        CF clear if successful
            AL = SCSI message byte (if early return mode is clear)
        CF set on error
            AL = error code (see #03786)
Note:   this command sends data using DMA
SeeAlso: AH=12h,AH=13h

Format of TARGA.DEV SCSI Command:
Offset  Size    Description     (Table 03808)
 00h    BYTE    length of command
 01h    ???     command bytes
--------d-7815-------------------------------
INT 78 - TARGA.DEV - FINISH DATA TRANSFER (DMA)
        AH = 15h
Return: AH = SCSI status byte
        CF clear if successful
            AL = SCSI message byte
        CF set on error
            AL = error code (see #03786)
Note:   if AH=06h was previously called to set the early return mode, this
          function finishes a command AH=13h or AH=14h which returned before
          the last DMA transfer was finished
SeeAlso: AH=06h,AH=13h,AH=14h
--------V-79---------------------------------
INT 79 - AVATAR.SYS - FAST GET KEYSTROKE
Return: CF set if no keystroke available
            AX = FFFFh
        CF clear if key pressed
            AX = keystroke
Program: AVATAR.SYS is a CON driver by George Adam Stanislav which interprets
          AVATAR command codes just as ANSI.SYS interprets ANSI commands
Note:   if a keystroke is available, it is removed from the keyboard buffer
          before being returned
SeeAlso: INT 29,INT 2F/AX=1A00h/BX=4156h
--------E-79---------------------------------
INT 79 - DJGPP GO32.EXE DOS EXTENDER - RELOCATED IRQ1
Notes:  this vector is overwritten when GO32 starts but is not restored by
          early versions of the extender
        the newest versions of GO32 dynamically allocate the vectors used
          for the relocated IRQs, much as DESQview does (see INT 50"DESQview")
SeeAlso: INT 09,INT 78"GO32",INT 7A"GO32"
--------d-79---------------------------------
INT 79 U - ADP-60 IDE adapter - ???
SeeAlso: INT 78"ADP-60"
--------E-79---------------------------------
INT 79 - DBOS DOS Extender
        details not available
Desc:   this interrupt is used by an MS Windows virtual device driver with
          which the DBOS extender communicates when run inside a Windows
          Enhanced Mode DOS box
SeeAlso: INT 78"DBOS"
--------A-790001-----------------------------
INT 79 R - AutoCAD Device Interface - DIGITIZER - INITIALIZE
        AX = 0001h
        BX = interface level (0001h)
Return: AX = status (0000h initialization failed, 0001h init successful)
        BX = digitizer type
            0000h relative pointing device (mouse, etc.)
            0001h digitizing tablet
        CX = digitizer dataflow type
            0000h continuous
            0001h pauses between packets
SeeAlso: AX=0002h,AX=0003h,INT 7A/AX=0001h"AutoCAD"
--------A-790002-----------------------------
INT 79 R - AutoCAD Device Interface - DIGITIZER - TERMINATE
        AX = 0002h
SeeAlso: AX=0001h,AX=0003h
--------A-790003-----------------------------
INT 79 R - AutoCAD Device Interface - DIGITIZER - GET DIGITIZER STATUS
        AX = 0003h
Return: AX = status
            0000h nothing
            0002h tracking point (no button pressed)
                BX = X coordinate
                CX = Y coordinate
            0003h picked point (button 0,A,B,C,D pressed)
                BX = X coordinate
                CX = Y coordinate
            0004h button pick
                BX = button number
            0005h button and coordinates
                BX = button number
                CX = X coordinate
                DX = Y coordinate
SeeAlso: AX=0001h,AX=0002h
--------N-7A---------------------------------
INT 7A U - Topware Network Operating System - ???
        AL = ???
        ???
Return: ???
SeeAlso: INT 21/AX=FF00h"Topware",INT 2F/AX=FF00h
--------N-7A---------------------------------
INT 7A - X.PC Packet software interface
        ES:BX -> parameter block
SeeAlso: INT 60/AX=01FFh
--------E-7A---------------------------------
INT 7A - DJGPP GO32.EXE DOS EXTENDER - RELOCATED IRQ2
Program: GO32.EXE is a DOS extender included as part of the 80386 port of the
          GNU C/C++ compiler by DJ Delorie and distributed as DJGPP
Notes:  this vector is overwritten when GO32 starts but is not restored by
          early versions of the extender
        the newest versions of GO32 dynamically allocate the vectors used
          for the relocated IRQs, much as DESQview does (see INT 50"DESQview")
SeeAlso: INT 0A"IRQ2",INT 79"GO32",INT 7B"GO32"
--------P-7A---------------------------------
INT 7A O - PRINDIR - API (moved to INT 7C, then INT 2F/AX=7F00h)
SeeAlso: INT 7C"PRINDIR",INT 2F/AX=7F00h"PRINDIR"
--------N-7A---------------------------------
INT 7A - Novell NetWare - LOW-LEVEL API - Notes
Note:   this interrupt is used for IPX/SPX access in NetWare versions through
          2.0a; in later versions, you should use INT 2F/AX=7A00h to get an
          entry point even though INT 7A still exists.  For both INT 7A and
          the FAR entry point, BX contains the function number; IPX is
          sometimes called internally with BX bit 15 set, which causes the
          handler to bypass some initial checks and an optional call to the
          IPX Windows support handler set with INT 2F/AX=7AFFh/BX=0000h
          (see #02926)
SeeAlso: INT 2F/AX=7A00h,INT 64"Novell",INT 7A/BX=0000h
--------N-7A----BX0000-----------------------
INT 7A - Novell NetWare - IPX Driver - OPEN SOCKET
        BX = 0000h
        AL = socket longevity
            00h open until close or terminate
            FFh open until close
        DX = socket number (high byte in DL)
            0000h dynamic allocation
            else  socket to open (see #03809)
Return: AL = return code
            00h success
                DX = socket number
            FEh socket table full
            FFh socket already open
Notes:  TSRs which need to use sockets should set AL to FFh, non-resident
          programs should normally use AL=00h
        IPX can be configured to support up to 150 open sockets on a
          workstation, and defaults to 20
        this function is supported by Advanced NetWare 1.02+
SeeAlso: INT 7A/BX=0001h,INT 7A/BX=0004h,INT 7A/BX=0023h

(Table 03809)
Values for IPX socket number:
 0451h  File Service (NetWare Core Protocol)
 0452h  Service Advertising Protocol (see #03817)
 0453h  Routing Information Packet (see #03820)
 0455h  NetBIOS Packet
 0456h  diagnostics
 0457h  server serial numbers (labeled "Copy Protection" by Lanalyzer)
 2222h  NetWare Core Protocol
 4000h-7FFFh used for dynamic allocation
 4444h  Brightwork Development's SiteLock server
 5555h  Brightwork Development's SiteLock client (workstation)
 8000h-FFFFh assigned by Novell
 869Ch  ID Software's DOOM
Note:   SiteLock is an application metering product using IPX to communicate
          between the application and the license server
--------N-7A----BX0001-----------------------
INT 7A - Novell NetWare - IPX Driver - CLOSE SOCKET
        BX = 0001h
        DX = socket number (high byte in DL) (see #03809)
Notes:  also cancels events set by any Event Control Blocks for the socket
        the program must close all open sockets before terminating
        this function is supported by Advanced NetWare 1.02+
SeeAlso: BX=0000h
--------N-7A----BX0002-----------------------
INT 7A - Novell NetWare - IPX Driver - GET LOCAL TARGET
        BX = 0002h
        ES:SI -> target internetwork address (see #03824 at INT 7A/BX=000Bh)
        ES:DI -> 6-byte buffer for local target
Return: AL = return code
            00h success
               CX = expected one-way transfer time (clock ticks) for a 576-byte
                      packet
               ES:DI -> local target
            FAh unsuccessful (no path to destination)
Notes:  the internetwork address consists of a 4-byte network address followed
          by a 6-byte node address.  The local target is only a 6-byte node
          address.  If the target is in the same network, the local target is
          just the node address of target; otherwise, the local target is the
          node address of the bridge that leads to the target.
        this function may be called from inside IPX and AES Event Service
          Routines, but not from other interrupt handlers
        this function is supported by Advanced NetWare 1.02+
SeeAlso: BX=0009h
--------N-7A----BX0003-----------------------
INT 7A - Novell NetWare - IPX Driver - SEND PACKET
        BX = 0003h
        ES:SI -> Event Control Block (see #03810,#03811)
Notes:  returns immediately; IPX attempts to send the packet in the background
        this function is supported by Advanced NetWare 1.02+
        this function is nearly identical to BX=000Fh, except that it always
          copies the source address into the IPX header assumed to be at the
          beginning of the first fragment
SeeAlso: BX=0004h,BX=000Fh,INT 21/AH=EEh"Novell"

Format of IPX Event Control Block:
Offset  Size    Description     (Table 03810)
 00h    DWORD   Link
 04h    DWORD   -> Event Service Routine (00000000h if none) (see #03814)
 08h    BYTE    in use flag (see #03812)
 09h    BYTE    completion code (see #03813)
 0Ah    WORD    (big-endian) socket number (see #03809)
 0Ch  4 BYTEs   IPX workspace
 10h 12 BYTEs   driver workspace
 1Ch  6 BYTEs   immediate local node address
 22h    WORD    fragment count
 24h    var     fragment descriptors
                Offset  Size    Description
                 00h    DWORD   -> fragment data
                 04h    WORD    size of fragment in bytes.
Notes:  ESR is a far procedure that is called when the ECB has been handled.
          On call, the in use flag is zero if the ECB has been handled,
          non-zero otherwise. If the flag is zero, the completion code holds
          the result of the event.
        the first fragment should start with an IPX header (see #03815)
        all fragments are concatenated and sent in one piece
        node address FFh FFh FFh FFh FFh FFh broadcasts to all nodes
SeeAlso: #03811

Format of AES-ECB:
Offset  Size    Description     (Table 03811)
 00h    DWORD   Link
 04h    DWORD   ESR (Event Service Routine) address (see #03814)
 08h    BYTE    in use flag (see #03812)
 09h  5 BYTEs   AES workspace
SeeAlso: #03810

(Table 03812)
Values for ECB in use flag:
 00h    available
 E0h    AES temporary
 F6h    \ special IPX/SPX processing for v3.02+
 F7h    /
 F8h    IPX in critical section
 F9h    SPX listening
 FAh    processing
 FBh    holding
 FCh    AES waiting
 FDh    AES couting down delay time
 FEh    awaiting packet reception
 FFh    sending packet
SeeAlso: #03810,#03811,#03813

(Table 03813)
Values for ECB completion code:
 00h    success
 ECh    remote terminated connection without acknowledging packet
 EDh    abnormal connection termination
 EEh    invalid connection ID
 EFh    SPX connection table full
 F9h    event should not be cancelled
 FAh    cannot establish connection with specified destination
 FCh    cancelled
 FDh    malformed packet
 FEh    packet undeliverable
 FFh    physical error
SeeAlso: #03810,#03812

(Table 03814)
Values Event Service Routine is called with:
        AL = caller's identity (00h = AES, FFh = IPX)
        ES:SI -> event control block
        interrupts disabled
Return: all registers preserved
SeeAlso: #03810,#03815

Format of IPX header:
Offset  Size    Description     (Table 03815)
 00h    WORD    (big-endian) checksum
 02h    WORD    (big-endian) length in bytes of total packet
 04h    BYTE    transport control
 05h    BYTE    packet type (see #03816)
 06h 10 BYTEs   destination internetwork address
 10h    WORD    (big-endian) destination socket
 12h 10 BYTEs   source internetwork address
 1Ch    WORD    (big-endian) source socket
Notes:  an IPX packet has the identical format as a Xerox Network Standard
          (XNS) packet
        the application must set packet type, destination address, and
          destination socket; IPX/SPX set the remaining fields
SeeAlso: #03810,#03826

(Table 03816)
Values for IPX packet type:
 00h    unknown packet type
 01h    routing information packet
 02h    echo packet
 03h    error packet
 04h    packet exchange packet (always use this one for data)
 05h    SPX packet (see #03826)
 11h    NetWare Core Protocol (also used by Service Advertising Protocol)
 14h    Propagated Packet (for NetWare), NetBIOS name packet
 15h-1Eh experimental protocols
Note:   undocumented packet type 14h will cross up to 16 networks deep in
          all directions; as Aaron Martin of Origin Systems discovered, the
          first 64 bytes of the IPX data in such packets should be considered
          reserved, as IPX places the traversed server nodes there.

Format of Service Advertising Protocol Service Query Packet:
Offset  Size    Description     (Table 03817)
 00h 30 BYTEs   IPX header
 1Eh    WORD    (big-endian) query type
                0001h general find service
                0003h find nearest server
 20h    WORD    (big-endian) server type
                (see #01890 at INT 21/AH=E3h"CONNECTION CONTROL")
SeeAlso: #03818

Format of Service Advertising Protocol Server Identification Packet:
Offset  Size    Description     (Table 03818)
 00h 30 BYTEs   IPX header
 1Eh    WORD    (big-endian) response type
                0002h general service
                0004h nearest service
 20h 64N BYTEs  server entries (1-7) (see #03819)
SeeAlso: #03817,#03820

Format of SAP server entry:
Offset  Size    Description     (Table 03819)
 00h    WORD    (big-endian) server type
                (see #01890 at INT 21/AH=E3h"CONNECTION CONTROL")
 02h 48 BYTEs   ASCIZ server name
 32h  2 WORDs   (big-endian) network number
 34h  3 WORDs   (big-endian) node number
 3Ch    WORD    (big-endian) socket number
 3Eh    WORD    (big-endian) number of hops between caller and server
                10h = Server Shutdown Advertising Packet
SeeAlso: #03818

Format of IPX Routing Information packet:
Offset  Size    Description     (Table 03820)
 00h 30 BYTEs   IPX header
 1Eh    WORD    operation (0001h request, 0002h response)
 20h 8N BYTEs   network entries (1-50) (see #03821)
SeeAlso: #03818

Format of RIP network entry:
Offset  Size    Description     (Table 03821)
 00h    DWORD   network number (FFFFFFFFh = general request)
 04h    WORD    (response) number of hops
 06h    WORD    (response) number of clock ticks to reach destination
--------N-7A----BX0004-----------------------
INT 7A - Novell NetWare - IPX Driver - LISTEN FOR PACKET
        BX = 0004h
        ES:SI -> Event Control Block (see BX=0003h)
Return: AL = status
            00h successful
            FFh no listening socket for packet
Desc:   this function provides IPX with an ECB for receiving an IPX packet, but
          does not wait for a packet to arrive
Notes:  the application must open a socket and initialize the ECB's ESR
          address, socket number, fragment count, and fragment descriptor
          fields before invoking this function
        there is no limit on the number of ECBs which may simultaneously be
          listening on a socket
        this function is supported by Advanced NetWare 1.02+
SeeAlso: BX=0000h,BX=0003h
--------N-7A----BX0005-----------------------
INT 7A - Novell NetWare - IPX Driver - SCHEDULE IPX EVENT
        BX = 0005h
        AX = delay time in clock ticks
        ES:SI -> Event Control Block (see BX=0003h)
Note:   this function is supported by Advanced NetWare 1.02+
SeeAlso: BX=0006h,BX=0007h,BX=0008h
--------N-7A----BX0006-----------------------
INT 7A - Novell NetWare - IPX Driver - CANCEL EVENT
        BX = 0006h
        ES:SI -> Event Control Block (see BX=0003h)
Return: AL = return code (see #03822)
Notes:  cannot cancel packets which the node's driver has already sent
        this function is supported by Advanced NetWare 1.02+
SeeAlso: BX=0005h

(Table 03822)
Values for IPX return code:
 00h    success
 F9h    event in use
 FCh    event cancelled
 FFh    unsuccessful, event not in use, or unrecognized ECB flag
--------N-7A----BX0007-----------------------
INT 7A - Novell NetWare - IPX Driver - SCHEDULE SPECIAL EVENT
        BX = 0007h
        AX = delay time
        ES:SI -> Event Control Block (see BX=0003h)
Note:   this function is supported by Advanced NetWare 1.02+
SeeAlso: BX=0006h
--------N-7A----BX0008-----------------------
INT 7A - Novell NetWare - IPX Driver - GET INTERVAL MARKER
        BX = 0008h
Return: AX = interval marker in clock ticks (big-endian???)
Notes:  may be used to measure the time elapsed between two events, up to one
          hour
        this function is supported by Advanced NetWare 1.02+
SeeAlso: BX=0005h
--------N-7A----BX0009-----------------------
INT 7A - Novell NetWare - IPX Driver - GET INTERNETWORK ADDRESS
        BX = 0009h
        ES:SI -> buffer for own internetwork address (see #03823)
Return: ES:SI buffer filled
        SI destroyed
Note:   this function is supported by Advanced NetWare 1.02+
SeeAlso: BX=0002h,BX=000Bh

Format of IPX internetwork address:
Offset  Size    Description     (Table 03823)
 00h  4 BYTEs   (big-endian) network number
 04h  6 BYTEs   (big-endian) node number within network
--------N-7A----BX000A-----------------------
INT 7A - Novell NetWare - IPX Driver - RELINQUISH CONTROL
        BX = 000Ah
Desc:   this call indicates that the application is idle and permits the IPX
          driver to do some work
Note:   this function is supported by Advanced NetWare 1.02+
SeeAlso: INT 15/AX=1000h,INT 21/AH=89h,INT 2F/AX=1680h
--------N-7A----BX000B-----------------------
INT 7A - Novell NetWare - IPX Driver - DISCONNECT FROM TARGET
        BX = 000Bh
        ES:SI -> internetwork address (see #03824)
Return: nothing
Notes:  this function permits the network software on the remote machine to
          remove any virtual connection with the calling machine
        only use in point-to-point networks
        should never be called from within an Event Service Routine
        this function is supported by Advanced NetWare 1.02+
SeeAlso: BX=0002h,BX=0009h

Format of IPX internetwork address:
Offset  Size    Description     (Table 03824)
 00h  4 BYTEs   (big-endian) destination network
 04h  6 BYTEs   (big-endian) destination node
 0Ah  2 BYTEs   (big-endian) destination socket
--------N-7A----BX000C-----------------------
INT 7A U - Novell NetWare - IPX Driver - internal - INITIALIZE NETWORK ADDRESS
        BX = 000Ch
        CX:DX = global network address (see INT 7A/BX=0002h)
        ES:DI -> "OSINCRITICALSECTION" flag
        DS:SI -> current mode for socket
Note:   the address cannot be changed once it has been initialized
SeeAlso: INT 7A/BX=0024h
--------N-7A----BX000D-----------------------
INT 7A U - Novell NetWare - IPX Driver - internal - IPX GET PACKET SIZE
        BX = 000Dh
Return: AX = maximum packet size
        CX = retry count
SeeAlso: BX=001Ah
--------N-7A----BX000E-----------------------
INT 7A U - Novell NetWare - IPX Driver - internal - TERMINATE SOCKETS
        BX = 000Eh
Return: nothing
Notes:  this function terminates all sockets opened with the current mode; this
          may be intended for future enhancements as the socket mode never
          changes in v2.15
        called by the NetWare shell if a program terminates
--------N-7A----BX000F-----------------------
INT 7A - Novell NetWare - IPX Driver - INTERNAL - SEND PACKET
        BX = 000Fh
        ES:SI -> Event Control Block (see #03810 at BX=0003h)
                IPX header's checksum field must be set to FFFFh (see #03815)
                IPX header's total-length field must be set
Note:   nearly identical to function 0003h, but does not copy address into
          the first fragment, and bypasses normal error checking
SeeAlso: BX=0003h
--------N-7A----BX0010-----------------------
INT 7A - Novell NetWare - SPX Driver - INSTALLATION CHECK
        BX = 0010h
        AL = 00h
Return: AL = status
            00h if SPX not installed
            F0h if IPX not installed
            FFh if SPX loaded
                BH = SPX major version
                BL = SPX minor version
                CX = maximum SPX connections
                DX = SPX connections available
Notes:  this function is supported by Advanced NetWare 2.1+
        this interrupt is used for IPX/SPX access in NetWare versions through
          2.0a; in later versions, you should use INT 2F/AX=7A00h to get an
          entry point even though INT 7A still exists.  For both INT 7A and
          the FAR entry point, BX contains the function number
        IPX is sometimes called internally with BX bit 15 set, which causes the
          entry point handler to bypass some checks and an optional call to
          the IPX Windows support handler set with INT 2F/AX=7AFFh/BX=0000h
          (see #02926)
SeeAlso: BX=0015h
--------N-7A----BX0011-----------------------
INT 7A - Novell NetWare - SPX Driver - ESTABLISH SPX CONNECTION
        BX = 0011h
        AL = retry count
        AH = watchdog flag
        ES:SI -> Event Control Block (see #03810 at BX=0003h)
Return: AL = status (00h,EFh,FDh,FFh) (see #03825)
        DX = assigned connection ID number
Desc:   attempt to establish a connection with a listening socket
Notes:  there should always be at least two SPX ECB's listening to a socket, so
          that NetWare can perform its internal packet exchanges
        the first fragment should start with a SPX header (see #03826). Fill
          in all destination addresses.
        this function is supported by Advanced NetWare 2.1+
SeeAlso: BX=0000h,BX=0012h,BX=0013h,BX=0014h,BX=0015h

(Table 03825)
Values for SPX function status:
 00h    attempting to contact destination socket
 EEh    no such connection
 EFh    local connection table full
 FDh    buffer size not 42 or fragment count not 1
 FFh    sending socket not open

Format of SPX header:
Offset  Size    Description     (Table 03826)
 00h    WORD    (big-endian) checksum
 02h    WORD    (big-endian) length in bytes of total packet
 04h    BYTE    transport control
 05h    BYTE    packet type (see #03816 at INT 7A/BX=0003h)
 06h 10 BYTEs   destination internet address
 10h    WORD    (big-endian) destination socket
 12h 10 BYTEs   source internet address
 1Ch    WORD    (big-endian) source socket
 1Eh    BYTE    connection control (see #03827)
 1Fh    BYTE    datastream type
                FEh terminate connection request packet
                FFh terminate connection acknowledgement packet
                other user-defined, ignored by SPX
 20h    WORD    (big-endian) source connection ID
 22h    WORD    (big-endian) destination connection ID
 24h    WORD    (big-endian) sequence number
 26h    WORD    (big-endian) acknowledge number
 28h    WORD    (big-endian) allocation number
SeeAlso: #03815

Bitfields for SPX connection control:
Bit(s)  Description     (Table 03827)
 3-0    unused???
 4      end of message
 5      reserved
 6      acknowledgement required
 7      system packet
--------N-7A----BX0012-----------------------
INT 7A - Novell NetWare - SPX Driver - LISTEN FOR SPX CONNECTION
        BX = 0012h
        AH = watchdog flag (00h disabled, 01h enabled)
        AL = retry count (00h = default)
        ES:SI -> Event Control Block (see #03810 at BX=0003h)
Return: nothing
Notes:  there should always be at least two SPX ECB's listening to a socket, so
          that NetWare can perform its internal packet exchanges
        this function is supported by Advanced NetWare 2.1+
SeeAlso: BX=0011h,BX=0013h,BX=0014h
--------N-7A----BX0013-----------------------
INT 7A - Novell NetWare - SPX Driver - TERMINATE SPX CONNECTION
        BX = 0013h
        DX = connection ID to terminate
        ES:SI -> Event Control Block (see #03810 at BX=0003h)
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: BX=0011h,BX=0012h,BX=0014h
--------N-7A----BX0014-----------------------
INT 7A - Novell NetWare - SPX Driver - ABORT SPX CONNECTION
        BX = 0014h
        DX = connection ID to terminate
Return: nothing
Notes:  this function is supported by Advanced NetWare 2.1+
        this function does not tell the other side that the connection has been
          terminated
        also aborts any outstanding Establish Connection, Terminate Connection,
          and Send Sequenced Packet commands
SeeAlso: BX=0011h,BX=0013h
--------N-7A----BX0015-----------------------
INT 7A - Novell NetWare - SPX Driver - GET SPX CONNECTION STATUS
        BX = 0015h
        DX = connection ID
        ES:SI -> status buffer (see #03828)
Return: AL = return code (00h,EEh) (see also #03825)
            00h connection still valid
                ES:SI -> status buffer filled
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: BX=0010h,BX=0011h

Format of SPX status buffer:
Offset  Size    Description     (Table 03828)
 00h    BYTE    connection state
                01h waiting to establish connection
                02h starting (attempting to create connection)
                03h connection established
                04h terminating
 01h    BYTE    watchdog flag
                bit 0: used internally by SPX
                bit 1: SPX watchdog is monitoring connection
                bits 2-7 used internally by SPX
 02h    WORD    (big-endian) source connection ID
 04h    WORD    (big-endian) destination connection ID
 06h    WORD    (big-endian) sequence number of next packet sent
 08h    WORD    (big-endian) acknowledge number, expected sequence number of
                  next received packet
 0Ah    WORD    (big-endian) maximum sequence number remote SPX may send
                  without ACK from local SPX
 0Ch    WORD    (big-endian) remote acknowledge number, next sequence number
                  remote SPX expects to receive
 0Eh    WORD    (big-endian) remote allocation number, maximum sequence number
                  local SPX may send
 10h    WORD    (big-endian) connection socket
 12h  6 BYTEs   immediate node address--bridge on local network to destination
 18h 10 BYTEs   destination internetwork address (see #03824 at INT 7A/BX=000Bh)
 22h    WORD    (big-endian) retransmit count
 24h    WORD    (big-endian) estimated roundtrip delay
 26h    WORD    (big-endian) retransmitted packets
 28h    WORD    (big-endian) suppressed packets
 2Ah 12 BYTEs   ??? (v2.15)
--------N-7A----BX0016-----------------------
INT 7A - Novell NetWare - SPX Driver - SEND SPX PACKET
        BX = 0016h
        DX = connection ID
        ES:SI -> Event Control Block (see BX=0003h)
Notes:  this function is supported by Advanced NetWare 2.1+
        CX may need to be 0001h ???
SeeAlso: BX=0011h,BX=0017h
--------N-7A----BX0017-----------------------
INT 7A - Novell NetWare - SPX Driver - LISTEN FOR SPX PACKET
        BX = 0017h
        DX = connection ID (unused in v2.15)
        ES:SI -> Event Control Block (see BX=0003h)
Notes:  this function is supported by Advanced NetWare 2.1+
        CX may need to be 0001h ???
SeeAlso: BX=0011h,BX=0016h
--------N-7A----BX0018-----------------------
INT 7A U - Novell NetWare - IPX Driver - internal - ADD DIAGNOSTIC ELEMENT
        BX = 0018h
        ES:SI -> diagnostic element (see #03829) to be added to Diagnostic Queue
Note:   this function is supported on file servers only under v2.15; v3.02 also
          supports it on workstations
SeeAlso: BX=0019h

Format of IPX diagnostic element:
Offset  Size    Description     (Table 03829)
 00h    DWORD   pointer to next diagnostic element
 04h    DWORD   pointer to function for ???
 08h    DWORD   pointer to function for ???
--------N-7A----BX0019-----------------------
INT 7A U - Novell NetWare - IPX Driver - internal - CANCEL DIAGNOSTIC ELEMENT
        BX = 0019h
        ES:SI -> diagnostic element (see BX=0018h) to be removed
Note:   this function is supported on file servers only under v2.15; v3.02 also
          supports it on workstations
SeeAlso: BX=0018h
--------N-7A----BX001A-----------------------
INT 7A - Novell NetWare - IPX Driver - GET DRIVER MAXIMUM PACKET SIZE
        BX = 001Ah
Return: AX = maximum packet size with preamble (at least 576 bytes)
        CX = IPX retry count
        DS,FLAGS preserved
SeeAlso: BX=000Dh
--------N-7A----BX001B-----------------------
INT 7A U - Novell NetWare - IPX Driver - INTERNAL
        BX = 001Bh
        ???
Return: ???
Notes:  this function is supported on file servers only under v2.15; v3.02 also
          supports it on workstations
        used by NetWare Access Server, which may call INT 15/AX=1117h with
          BX=0000h in some cases (it uses a modified DESQview)
--------N-7A----BX001C-----------------------
INT 7A U - Novell NetWare - NetWare Access Server - GET ???
        BX = 001Ch
Return: AX = length of ???
        ES:BX -> ???
Notes:  these functions are NOPs for standard IPX drivers such as IPXODI v2.12
SeeAlso: INT 2F/AX=7AF1h,INT 7A/BX=001Dh,INT 7A/BX=001Eh
--------N-7A----BX001D-----------------------
INT 7A U - Novell NetWare - NetWare Access Server - GET ??? ECB AND SOCKET
        BX = 001Dh
Return: DX = socket number chosen by IPX
        ES:SI -> ECB in IPX's code segment (will be listening)
        BX corrupted
Notes:  these functions are NOPs for standard IPX drivers such as IPXODI v2.12
SeeAlso: INT 2F/AX=7AF1h,INT 7A/BX=001Ch,INT 7A/BX=001Eh
--------N-7A----BX001E-----------------------
INT 7A U - Novell NetWare - NetWare Access Server - GET ??? ECB
        BX = 001Eh
Return: ES:SI -> ECB
        BX corrupted
Notes:  these functions are NOPs for standard IPX drivers such as IPXODI v2.12
SeeAlso: INT 2F/AX=7AF1h,INT 7A/BX=001Ch,INT 7A/BX=001Dh
--------N-7A----BX001F-----------------------
INT 7A - Novell NetWare - IPXODI v2.12+ - GET IPX INFORMATION
        BX = 001Fh
        DX = 0000h
Return: AX = ???
        BX:CX -> ??? entry point (see #03830) (undocumented)
        DX = feature flags
            bit 0: IPXODI rather than dedicated IPX
            bit 1: checksumming functions 0020h-0022h supported
        ES:SI -> array of words containing used socket number (undocumented);
                0000h ends array
        all other registers except DS and FLAGS may be destroyed
Note:   IPXODI v2.12 is distributed as part of the Personal NetWare system
          bundled with Novell DOS 7
SeeAlso: BX=0020h,INT 2F/AX=7A2Fh

(Table 03830)
Call IPXODI entry point with:
        ES:SI -> ECB??? (offset 24h is far pointer to ??? data)
--------N-7A----BX0020-----------------------
INT 7A - Novell NetWare - IPXODI v2.12+ - SEND WITH CHECKSUM
        BX = 0020h
        ES:SI -> ECB (see #03810 at INT 7A/BX=0003h)
Return: DS,FLAGS preserved
        BX,BP corrupted (documented as potentially destroying all other regs)
Desc:   generate a checksum for the packet data and store it in the IPX
          checksum field before transmitting the packet
SeeAlso: BX=001Fh,BX=0021h,BX=0022h,INT 2F/AX=7A2Fh
--------N-7A----BX0021-----------------------
INT 7A - Novell NetWare - IPXODI v2.12+ - IPX GENERATE CHECKSUM
        BX = 0021h
        ES:SI -> ECB data (see #03810 at INT 7A/BX=0003h)
Return: ES,DS,SI preserved
        BX,BP corrupted, all other registers potentially destroyed
Notes:  the checksum and TransportControl fields of the IPX packet are updated
        this function enables interrupts and is fully reentrant
SeeAlso: BX=001Fh,BX=0020h,BX=0022h,INT 2F/AX=7A2Fh
--------N-7A----BX0022-----------------------
INT 7A - Novell NetWare - IPXODI v2.12+ - IPX VERIFY CHECKSUM
        BX = 0022h
        ES:SI -> ECB data (see #03810 at INT 7A/BX=0003h)
Return: AX = status (0000h checksum matches)
        DS,ES,SI preserved
        BX,BP corrupted, all other registers potentially destroyed
Note:   this function enables interrupts and is fully reentrant
SeeAlso: BX=001Fh,BX=0020h,BX=0021h,INT 2F/AX=7A2Fh
--------N-7A----BX0023-----------------------
INT 7A - Novell NetWare - IPXODI v2.12+ - OPEN LOOK-AHEAD SOCKET
        BX = 0023h
        DX = socket number (0000h for dynamic allocation)
        ES:SI -> Look Ahead handler (see #03831)
        BP = desired lookahead size (0000h-0080h)
Return: AL = status
            00h successful
                DX = assigned socket number (big-endian)
            FEh maximum number of sockets already open
            FFh specific socket already opened by another application
        DS,FLAGS preserved
        all other registers may be destroyed
Notes:  the socket will always be long-lived, and must thus be explicitly
          closed with INT 7A/BX=0001h before the Look Ahead handler code is
          removed from memory (i.e. the program terminates)
        this function is only supported if INT 2F/AX=7A00h returns ES:BX
          pointing at an IPX version greater than 3.30
        the desired lookahead size is the smallest-size packet (including IPX
          header) that should be passed to the lookahead handler when it
          arrives
SeeAlso: INT 7A/BX=0000h,INT 7A/BX=0001h

(Table 03831)
Call IPX Look-Ahead handler with:
        AX = packet's destination socket
        DS:SI -> look-ahead structure (see #03010 at INT 2F/AX=C000h"LSL")
        DF clear
        interrupt disabled (must remain disabled)
Return: AX = packet use
            0000h application want packet
                ES:SI -> ODI ECB (see #03011 at INT 2F/AX=C000h"LSL")
            8001h application does not want packet
        ZF set if AX=0000h
        DS,DI,BP,SS,SP preserved
        interrupts disabled
--------N-7A----BX0024-----------------------
INT 7A U - Novell NetWare - IPXODI v2.20+ - SET INTERNETWORK ADDRESS
        BX = 0024h
        ES:SI -> buffer containing internetwork address (see #03824)
Return: BX,CX,SI,DI,ES destroyed
Note:   this function differs from INT 7A/BX=000Ch in that it unconditionally
          sets the address
SeeAlso: INT 7A/BX=000Ch
--------A-7A0001-----------------------------
INT 7A R - AutoCAD Device Interface - DISPLAY - INITIALIZE (INIT1)
        AX = 0001h
        BX = configuration
        CX = interface level (0001h)
Return: AX = status
            0000h initialization failed
            0001h pre-v4.0 driver initialized successfully
            0003h post-v3.1 driver initialized successfully (driver truncates
                  excessivly long packets)
        BX = width of graphics area in pixels, or 0000h if using packet
                  communication
        DX:CX -> packet-mode entry point (see #03832)
SeeAlso: AX=0001h,AX=0200h,AX=07D0h,INT 61/AX=0007h"OPTIMA",INT 78"AutoCAD"
SeeAlso: INT 79/AX=0001h,INT 7B/AX=8001h"AutoCAD",INT 7C"AutoShade"

(Table 03832)
Call packet-mode entry point with:
STACK:  DWORD   pointer to request packet (see #03833)
        WORD    length of packet

Format of request packet:
Offset  Size    Description     (Table 03833)
 00h    WORD    function number (00h-45h for Compaq VGADI41.EXE)
--------A-7A0200BX0000-----------------------
INT 7A R - AutoCAD Device Interface - RENDERING DEVICE - INITIALIZE (RDLINKUP)
        AX = 0200h
        BX = 0000h
        CX = interface level (0001h)
Return: BX = 0000h (driver uses packet communication)
        DX:CX -> packet-mode entry point (see #03832)
SeeAlso: AX=0001h"AutoCAD",INT 79/AX=0001h,INT 7B/AX=8001h"AutoCAD"
--------I-7A04-------------------------------
INT 7A - IBM 3270 Workstation Program API - CREATE A QUEUE
        AH = 04h
        ???
Return: ???
SeeAlso: AH=06h
--------I-7A06-------------------------------
INT 7A - IBM 3270 Workstation Program API - DELETE A QUEUE
        AH = 06h
        ???
Return: ???
SeeAlso: AH=04h
----------7A07D0-----------------------------
INT 7A R - AutoCAD Device Interface - Compaq VGADI41.EXE - GET ENTRY POINT
        AX = 07D0h
Return: AX = ??? (0003h)
        BX = 0000h
        DX:CX -> ADI entry point (see AX=0001h)
SeeAlso: AX=0001h
--------I-7A09--BX8020-----------------------
INT 7A - IBM 3270 Workstation Program API - SESSION SERVICES
        AH = 09h
        BX = 8020h (synchronous request)
        CX = 0000h
        DX = ID of session manager (SESSMGR)
        AL = service (see #03834)
        ES:DI -> control block
Return: ???

(Table 03834)
Values for service:
 01h    get session ID
 02h    get session info
 04h    dettach from session
 05h    attach to session
 06h    get list of windows available
 07h    get environment of window
 08h    get 'PIF' (program information file) info
 0Ah    get base window ID
 0Bh    get cursor info
--------I-7A09--BX8020-----------------------
INT 7A - IBM 3270 Workstation Program API - KEYBOARD SERVICES
        AH = 09h
        BX = 8020h (synchronous request)
        CX = 0000h
        DX = ID of keyboard manager
        AL = service number (see #03835)
        ES:DI -> control block
Return: ???

(Table 03835)
Values for 3270 Workstation Program keyboard service:
 01h    connect to keyboard
 02h    disconnect from keyboard
 03h    read from keyboard
 04h    send keystroke to session
 05h    disable input
 06h    enable input
 07h    update status code
--------I-7A09--BX8020-----------------------
INT 7A - IBM 3270 Workstation Program API - WINDOW SERVICES
        AH = 09h
        BX = 8020h (synchronous request)
        CX = 00FFh
        DX = ID of window service controller (WSCTRL)
        AL = service number (see #03836)
        ES:DI -> control block
Return: ???

(Table 03836)
Values for 3270 Workstation Program window service:
 01h    connect to WS control
 02h    disconnect from WS control
 03h    add a window
 04h    change window's position on screen
 05h    change window's size
 06h    change window's color
 07h    change window's position in the presentation space
 08h    hide/unhide toggle
 09h    enlarge/reduce toggle
 0Ah    change screen background color
 0Bh    get window's position on screen
 0Ch    get window's size
 0Dh    get window's color
 0Eh    get window's position in the presentation space
 0Fh    determine whether hidden
 10h    determine whether enlarged
 11h    get background color
 12h    get window names
 13h    delete all windows from profile
 14h    pick active window
 15h    redraw screen
 16h    redraw window
 17h    delete a window from profile
 18h    get active window
 19h    get active screen
 1Ah    get window data
 1Bh    change window data
 1Ch    select active screen
--------I-7A09--BX8020-----------------------
INT 7A - IBM 3270 Workstation Program API - PRESENTATION SPACE SERVICES
        AH = 09h
        BX = 8020h
        CX = 00FFh
        DX = ID of PCPSM
        AL = service
            01h define presentation space
            02h delete presentation space
            03h display presentation space
            04h position cursor in presentation space
            05h change default presentation space
        ES:DI -> control block
Return: ???
--------I-7A09--BX8020-----------------------
INT 7A - IBM 3270 Workstation Program API - 3270 EMULATION
        AH = 09h
        BX = 8020h
        CX = 00FFh
        DX = ID of 3270EML
        AL = service
            01h connect
            02h disconnect
        ES:DI -> control block
Return: ???
--------I-7A09--BX8020-----------------------
INT 7A - IBM 3270 Workstation Program API - OPERATOR INFORMATION AREA
        AH = 09h
        BX = 8020h
        CX = 00FFh
        DX = ID of OIAM
        AL = service
            01h read Operator Information Area
            02h read OIA subset
        ES:DI -> control block
Return: ???
Note: the OIA is the 25th line on the Host session
--------I-7A09--BX8020-----------------------
INT 7A - IBM 3270 Workstation Program API - TRANSLATE DATA
        AH = 09h
        BX = 8020h
        CX = 00FFh
        DX = ID of XLATE
        AL = service
            01h translate from host characters to ASCII and vice versa
                (determined by control block byte 11)
        ES:DI -> control block
Return: ???
--------I-7A09--BX8020-----------------------
INT 7A - IBM 3270 Workstation Program API - COPY SERVICE
        AH = 09h
        BX = 8020h
        CX = 00FFh
        DX = ID of copy service
        AL = service
            01h copy string from one presentation space to another
            02h copy block from one presentation space to another
            03h connect to PC session for copy
            04h disconnect PC session from copy
        ES:DI -> control block
Return: ???
--------I-7A09--BX8020-----------------------
INT 7A - IBM 3270 Workstation Program API - Multi-DOS
        AH = 09h
        BX = 8020h
        CX = 00FFh
        ES:DI -> control block
        DX = ID of INDJQRY
                get environment size
           = ID of INDJASY
                request DOS functions from workstation
           = ID of MEMORY
                AL = function
                    01h allocate memory
                    02h deallocate memory
                    03h modify allocated size
Return: ???
--------I-7A09-------------------------------
INT 7A - IBM 3270 Workstation Program API - HOST SERVICES
        AH = 09h
        BX = request type (4000h async, 8028h synchronous)
        CX = 0000h
        DX = ID of MFIC
        AL = service (see #03837)
        ES:DI -> control block

(Table 03837)
Values for 3270 Workstation Program host service:
 01h    connect to host
 02h    disconnect from host
 03h    read DFT structured data from host
 04h    write DFT structured data to host
 05h    create a host buffer
--------I-7A13-------------------------------
INT 7A - IBM 3270 Workstation Program API - GET DATA FROM A QUEUE
        AH = 13h
        ???
Return: ???
----------7A7A-------------------------------
INT 7A - Canon IX-30F Image Scanner SI3.SYS - INTERFACE
        AH = 7Ah
        ???
Return: AX = status
            0000h success
            000Eh undefined function code
Range:  unknown, selected by device driver commandline arguments
--------I-7A81-------------------------------
INT 7A - IBM 3270 Workstation Program API - RESOLVE A GATE NAME
        AH = 81h
        ES:DI -> 8-char blank-padded gate name (see #03838)
Return: DX = gate ID

(Table 03838)
Values for 3270 Workstation Program gate name:
 "SESSMGR "
 "KEYBOARD"
 "WSCTRL  "
 "MFIC    "
 "PCPSM   "
 "3270EML "
 "COPY    "
 "XLATE   "
 "OIAM    "
 "MEMORY  "
 "INDJQRY "
 "INDJASY "
--------I-7A83-------------------------------
INT 7A - IBM 3270 Workstation Program API - GET COMPLETION RESULTS
        AH = 83h
        ???
Return: ???
--------I-7AFDCB-----------------------------
INT 7A - IBM Personal Communications/3270 - INSTALLATION CHECK
        AX = FDCBh
Return: DX:AX -> PCS/3270 signature block if loaded (see #03839)

Format of Personal Communications/3270 signature block:
Offset  Size    Description     (Table 03839)
 04h    WORD    PCS/3270 signature (5741h)
 06h    WORD    version (0501h = PCS/3270 v1.0)
--------I-7AFE01-----------------------------
INT 7A - IBM PC3270 EMUL PROG v3 - INTERNAL SEND/RECEIVE FUNCTION
        AX = FE01h
        ???
Return: ???
SeeAlso: AX=FE02h
--------I-7AFE02-----------------------------
INT 7A - IBM PC3270 EMUL PROG v3 - INTERNAL SEND/RECEIVE FUNCTION
        AX = FE02h
        ???
Return: ???
SeeAlso: AX=FE01h
--------I-7AFF01-----------------------------
INT 7A - IBM PC3270 EMUL PROG v3 - INTERNAL API INITIALIZATION
        AX = FF01h
        ES:DI -> API function handler routine
Return: CX = 1200h
SeeAlso: AX=FF02h,AX=FF03h
--------I-7AFF02-----------------------------
INT 7A - IBM PC3270 EMUL PROG v3 - INTERNAL API TERMINATION
        AX = FF02h
Return: CX = 1200h
SeeAlso: AX=FF01h
--------I-7AFF03-----------------------------
INT 7A - IBM PC3270 EMUL PROG v3 - INTERNAL API INITIALIZATION
        AX = FF03h
        ES:DI -> send/receive function handler routine
Return: CX = 1200h
SeeAlso: AX=FF01h
--------I-7AFF04-----------------------------
INT 7A U - IBM PC3270 EMUL PROG v3 - INTERNAL ???
        AX = FF04h
        ES:DI -> ???
Return: CX = 1200h
--------f-7B---------------------------------
INT 7B - Btrieve API (single user)
        DS:DX -> 38-byte parameter record (see #03840)
Return: return code field set
Note:   Btrieve sets low byte of vector to 33h; this serves as the installation
          check
SeeAlso: INT 2F/AX=AB01h,INT 7F/AX=0200h

Format of Btrieve parameter record:
Offset  Size    Description     (Table 03840)
 00h    DWORD   pointer to data buffer
 04h    WORD    data buffer length
 06h    DWORD   pointer to 90-byte record containing positioning info
                (should be same for all calls for same file)
 0Ah    DWORD   pointer to 38-byte FCB info buffer
                (should be same for all calls for same file)
 0Eh    WORD    function code (see #03841)
 10h    DWORD   pointer to file name/key buffer
 14h    BYTE    key length
 15h    BYTE    key number
 16h    DWORD   pointer to status code (see #03842)
 1Ah    WORD    interface code (version specific)
                6176h version 5.10

(Table 03841)
Values for function code:
 00h    open
 01h    close
 02h    insert
 03h    update
 04h    delete
 05h    get_equal
 06h    get_next
 07h    get_prev
 08h    get_greater
 09h    get_gr_eql
 0Ah    get_less
 0Bh    get_less_eq
 0Ch    get_first
 0Dh    get_last
 0Eh    create
 0Fh    stat
 10h    extend
 11h    set_dir: set directory information
 12h    get_dir: get directory information
 13h    begin_trans
 14h    end_trans
 15h    abort_trans
 16h    get_pos: get record position number
 17h    get_direct: get data by sending record position
 18h    step_next
 19h    stop
 1Ah    version
 1Bh    unlock
 1Ch    reset
 1Dh    set owner
 1Eh    clear owner
 1Fh    create supplemental index
 20h    drop supplemental index
 21h    step first
 22h    step last
 23h    step previous
 24h    get next extended: get multiple records using a filter
 25h    get previous extended: get multiple records using a filter
 26h    step next extended: get multiple records using a filter
 27h    step previous extended: get multiple records using a filter
 28h    insert extended: insert one or more records
 31h    ???
Notes:  add 50 (32h) to any "get" operation to just return the key data
        add 100 (64h) for a single-record wait lock (automatically released
          on next get)
        add 200 (C8h) for a single-record nowait lock (nowait lock returns
          error 54h or 55h if record already locked)
        add 300 (12Ch) for a multiple-record wait lock (not released until
          unlock called)
        add 400 (190h) for a multiple-record nowait lock (nowait lock returns
          error 54h or 55h if record already locked)

(Table 03842)
Values for Btrieve status code:
 00h    successful
 01h    invalid operation
 02h    I/O error
 03h    file not open
 04h    key value not found
 05h    duplicate key value
 06h    invalid key number
 07h    different key number
 08h    invalid positioning
 09h    end of file
 0Ah    modifiable key value error
 0Bh    invalid file name
 0Ch    file not found
 0Dh    extended file error
 0Eh    pre-image open error
 0Fh    pre-image I/O error
 10h    expansion error
 11h    close error
 12h    disk full
 13h    unrecoverable error
 14h    record manager inactive
 15h    key buffer too short
 16h    data buffer length overrun
 17h    position block length
 18h    page size error
 19h    create I/O error
 1Ah    number of keys
 1Bh    invalid key position
 1Ch    invalid record length
 1Dh    invalid key length
 1Eh    not a Btrieve file
 1Fh    file already extended
 20h    extended I/O error
 22h    invalid extension name
 23h    directory error
 24h    transaction error
 25h    transaction is active
 26h    transaction control file I/O error
 27h    end/abort transaction error
 28h    transaction max files
 29h    operation not allowed
 2Ah    incomplete accelerated access
 2Bh    invalid record address
 2Ch    null key path
 2Dh    inconsistent key flags
 2Eh    access to file denied
 2Fh    maximum open files
 30h    invalid alternate sequence definition
 31h    key type error
 32h    owner already set
 33h    invalid owner
 34h    error writing cache
 35h    invalid interface
 36h    variable page error
 37h    autoincrement error
 38h    incomplete index
 39h    expanded memory error
 3Ah    compression buffer too short
 3Bh    file already exists
 3Ch    reject count reached
 3Dh    work space too small
 3Eh    incorrect descriptor
 3Fh    invalid extended insert
 40h    filter limit reached
 41h    incorrect field offset
 4Ah    automatic transaction abort
 4Dh    Btrieve engine busy or resource locked by another user
 4Eh    deadlock detected
 50h    conflict
 51h    lock error
 52h    lost position
 53h    read outside transaction
 54h    record in use
 55h    file in use
 56h    file table full
 57h    handle table full
 58h    incompatible open mode
 5Ah    redirected device table full
 5Bh    server error
 5Ch    transaction table full
 5Dh    incompatible lock type
 5Eh    permission error
 5Fh    session no longer valid
 60h    communications environment error
 61h    data message too small
 62h    internal transaction error
--------I-7B---------------------------------
INT 7B - Eicon Access API (3270/5250 gateways)
SeeAlso: INT 5C"NetBIOS"
--------E-7B---------------------------------
INT 7B - DJGPP GO32.EXE DOS EXTENDER - RELOCATED IRQ3
Notes:  this vector is overwritten when GO32 starts but is not restored by
          early versions of the extender
        the newest versions of GO32 dynamically allocate the vectors used
          for the relocated IRQs, much as DESQview does (see INT 50"DESQview")
SeeAlso: INT 0B,INT 10/AH=FFh"GO32",INT 7A"GO32",INT 7C"GO32"
--------A-7B---------------------------------
INT 7B CR - AutoCAD Device Interface - PRINTER/PLOTTER - SEND PLOTTING DATA
        AX = data length (0000h-7FFFh)
        CX:BX -> data to be plotted
        DX = vertical position of line on page
Return: nothing
Notes:  This interrupt is called by AutoCAD to perform its output
        A data length of 0000h indicates that a blank line is to be output
SeeAlso: AX=8001h,AX=8002h,INT 78"AutoCAD",INT 7A/AX=0001h"AutoCAD"
--------e-7B---------------------------------
INT 7B U - MCI Express v2.11+ - DRIVER.EXE - ???
Program: MCI Express is a front end to MCI Mail; DRIVER.EXE is its
          communication driver
----------7B---------------------------------
INT 7B - Novell XQL - XQL PRIMITIVES MANAGER API
        DS:DX -> parameter block (see #03844)
Return: parameter block updated

(Table 03843)
Values for Novell XQL function number:
 00h    log in
 01h    log out
 02h    "tNewFcn"
 03h    "tFreeFcn"
 04h    "tMoveFldFcn"
 05h    "tFieldFcn"
 06h    "tDescribeFcn"
 07h    "tFetchFcn"
 08h    "tComputeFcn"
 09h    "tOrderFcn"
 0Ah    "tRestrictFcn"
 0Bh    "tJoinFcn"
 0Ch    "tInsertFcn"
 0Dh    "tUpdateFcn"
 0Eh    "tUpdallFcn"
 0Fh    "tRemoveFcn"
 10h    "tRemallFcn"
 11h    "tResetFcn"
 12h    "tTransFcn"
 13h    "tStatFcn"
 14h    "tDDCreFcn"
 15h    "tStoreFcn"
 16h    "tRecallFcn"
 17h    "tStopFcn"
 18h    "tDDFileFcn"
 19h    "tDDFieldFcn"
 1Ah    "tDDIndexFcn"
 1Bh    "tDDModFcn"
 1Ch    "tDDViewFcn"
 1Dh    "tDDDrpFcn"
 1Eh    "tDDPathFcn"
 1Fh    "tDDAttrFcn"
 20h    "tDDFcn"
 21h    "tSecurFcn"
 22h    "tUserFcn"
 23h    "tAccessFcn"
 24h    "tPswdFcn"
 25h    "tCharFcn"
 26h    "tVersionFcn"
 27h    "tCnvFcn"
 28h    "tValFcn"
 29h    "tMaskFcn"
SeeAlso: #03844

Format of XQL parameter block:
Offset  Size    Description     (Table 03844)
 00h  4 BYTEs   signature "XQLP"
 04h    WORD    function number (see #03843)
 06h    WORD    handle
 08h    WORD    status
 0Ah    WORD    session ID
 0Ch    var     data record (varies by function)
---function 00h---
 0Ch    DWORD   -> user name
 10h    DWORD   -> password
 14h    DWORD   -> dictionary
 18h    DWORD   -> filepath
 1Ch    DWORD   -> machine name
 20h    WORD    process ID
---function 01h---
 no additional fields???
---function 02h---
 0Ch    DWORD   -> filename
 10h    DWORD   -> owner name
 14h    WORD    open mode
---function 03h---
 no additional fields???
---function 04h---
 0Ch    WORD    "frompos"
 0Eh    WORD    "topos"
---function 05h---
 0Ch    WORD    subfunction
 0Eh    WORD    position
 10h    WORD    count
 12h    DWORD   -> field list
---function 06h---
 0Ch    WORD    subfunction
 0Eh    WORD    length of description
 10h    WORD    position
 12h    WORD    count
 14h    DWORD   pointer to description list
---function 07h---
 0Ch    WORD    data length
 0Eh    WORD    "op"
 10h    DWORD   "select"
 14h    DWORD   "reject"
 18h    DWORD   pointer to data buffer
---function 08h---
 0Ch    DWORD   -> field name
 10h    WORD    field type
 12h    WORD    field size
 14h    WORD    "flddec"
 16h    WORD    "explen"
 18h    DWORD   pointer to "expbuf"
---function 09h---
 0Ch    WORD    count
 0Eh    DWORD   -> field list
---function 0Ah---
 0Ch    WORD    "newexp"
 0Eh    WORD    "explen"
 10h    DWORD   -> "expbuf"
---function 0Bh---
 0Ch    DWORD   -> filename
 10h    DWORD   -> owner name
 14h    WORD    type of join
 16h    WORD    "pCount"
 18h    DWORD   -> "pNames"
 1Ch    WORD    "sCount"
 1Eh    DWORD   -> "sNames"
---functions 0Ch, 0Dh, 0Fh---
 0Ch    WORD    file count
 0Eh    DWORD   -> file list
 12h    DWORD   count
 16h    DWORD   -> buffer
---function 0Eh---
 0Ch    WORD    file count
 0Eh    DWORD   -> file list
 12h    WORD    "op"
 14h    DWORD   "select"
 18h    DWORD   "reject"
 1Ch    WORD    count
 1Eh    DWORD   -> "res"
 22h    DWORD   -> "comp"
---function 10h---
 0Ch    WORD    file count
 0Eh    DWORD   -> file list
 12h    WORD    "op"
 14h    DWORD   "select"
 18h    DWORD   "reject"
---function 11h---
 0Ch    DWORD   machine name
---function 12h---
 0Ch    WORD    option
---function 13h---
 0Ch    WORD    subfunction
 0Eh    WORD    length of buffer
 10h    DWORD   -> buffer
---function 14h---
 0Ch    WORD    subfunction
 0Eh    DWORD   -> filename
 12h    WORD    "create"
 14h    DWORD   -> pathname
 18h    DWORD   -> owner name
 1Ch    WORD    owner access restrictions
 1Eh    WORD    number of fields
 20h    DWORD   -> field list
 24h    WORD    number of keys
 28h    DWORD   -> key list
 2Ch    WORD    "buflen"
 2Eh    DWORD   -> create parameters
---function 15h---
 0Ch    DWORD   -> "StoreName"
 10h    WORD    length of buffer
 12h    DWORD   -> buffer
---function 16h---
 0Ch    DWORD   -> "RecallName"
 10h    WORD    owner number
 12h    DWORD   -> owner list
 16h    WORD    open mode
 18h    WORD    length of buffer
 1Ah    DWORD   -> buffer
---function 17h---
 no additional fields???
---function 18h---
 0Ch    WORD    "rtype"
 0Eh    WORD    count
 10h    DWORD   -> "filebuf"
 14h    WORD    length of following buffer
 16h    DWORD   -> output buffer
---functions 19h, 1Ah---
 0Ch    WORD    "rtype"
 0Eh    WORD    count
 10h    DWORD   -> field buffer
 14h    WORD    length of following buffer
 16h    DWORD   -> output buffer
---function 1Bh---
 0Ch    WORD    subfunction
 0Eh    DWORD   -> filename
 12h    WORD    "create"
 14h    DWORD   -> pathname
 18h    DWORD   -> owner name
 1Ch    WORD    owner access restrictions
 1Eh    WORD    field count
 20h    DWORD   -> field list
 24h    WORD    number of keys
 26h    DWORD   -> list of keys
---function 1Ch---
 0Ch    WORD    count
 0Eh    DWORD   -> view name
 12h    WORD    length of following buffer
 14h    DWORD   -> output buffer
---function 1Dh---
 0Ch    DWORD   -> filename
 10h    WORD    file type
 12h    WORD    "deletepath"
---function 1Eh---
 0Ch    WORD    "dirtype"
 0Eh    DWORD   -> pathname
---function 1Fh---
 0Ch    WORD    function
 0Eh    DWORD   -> field name
 12h    WORD    attribute
 14h    WORD    size of buffer
 16h    DWORD   -> buffer for attributes
---function 20h---
 0Ch    DWORD   -> directory path
 10h    WORD    function
---function 21h---
 0Ch    DWORD   -> master password
 10h    WORD    "securityflag"
---function 22h---
 0Ch    DWORD   -> master password
 10h    WORD    function (add/modify/remove)
 12h    DWORD   -> user name
 16h    DWORD   -> password
 1Ah    WORD    global rights
 1Ch    WORD    count
 1Eh    WORD    length of following buffer
 20h    DWORD   -> "userbuf"
---function 23h---
 0Ch    DWORD   -> master password
 10h    DWORD   -> user name
 14h    WORD    function (allow/deny/getrights)
 16h    WORD    rights
 18h    DWORD   -> filename
 1Ch    WORD    number of field names in following buffer
 1Eh    DWORD   -> field names
 22h    WORD    maximum buffer length
 24h    DWORD   -> output buffer
---function 24h---
 0Ch    DWORD   -> user name
 10h    DWORD   -> password
---function 25h---
 0Ch    WORD    "charFcn"
 0Eh    WORD    "charType"
 10h    WORD    "charValue"
---function 26h---
 0Ch    DWORD   -> buffer
---function 27h---
 0Ch    WORD    option
 0Eh    WORD    type
 10h    WORD    size
 12h    WORD    "dec"
 14h    WORD    "dsize"
 16h    DWORD   -> value
 1Ah    DWORD   -> "retval"
 1Eh    DWORD   -> mask
 22h    WORD    "justify"
---function 28h---
 0Ch    DWORD   -> field name
 10h    WORD    length of buffer
 12h    DWORD   -> buffer for data
---function 29h---
 0Ch    WORD    option
 0Eh    WORD    type
 10h    WORD    size
 12h    WORD    "dec"
 14h    WORD    length of mask
 16h    DWORD   -> mask
--------A-7B8001-----------------------------
INT 7B R - AutoCAD Device Interface - PRINTER/PLOTTER - BEGIN PLOT
        AX = 8001h
        BX = file level
            0000h binary file
            0001h CAD/camera image file
            0002h installed ADI driver
        CX = horizontal size in pixels
        DX = vertical size in pixels
Return: AX = status (0000h initialization failed, 0001h init successful)
        BX = allowed output format
            0000h monochrome
            0001h color (4 bits per pixel)
SeeAlso: AX=8002h,AX=8003h,INT 7B"AutoCAD",INT 7C"AutoShade"
--------A-7B8002-----------------------------
INT 7B R - AutoCAD Device Interface - PRINTER/PLOTTER - END PLOT
        AX = 8002h
SeeAlso: AX=8001h,AX=8003h
--------A-7B8003-----------------------------
INT 7B R - AutoCAD Device Interface - PRINTER/PLOTTER - ABORT PLOT
        AX = 8003h
SeeAlso: AX=8001h,AX=8002h
--------r-7C---------------------------------
INT 7C U - IBM REXX88PC command language
        ???
--------E-7C---------------------------------
INT 7C - DJGPP GO32.EXE DOS EXTENDER - RELOCATED IRQ4
Program: GO32.EXE is a DOS extender included as part of the 80386 port of the
          GNU C/C++ compiler by DJ Delorie and distributed as DJGPP
Notes:  this vector is overwritten when GO32 starts but is not restored by
          early versions of the extender
        the newest versions of GO32 dynamically allocate the vectors used
          for the relocated IRQs, much as DESQview does (see INT 50"DESQview")
SeeAlso: INT 0C,INT 7B"GO32",INT 7D"GO32"
--------P-7C---------------------------------
INT 7C - PRINDIR v8.02-8.xx - API
        AH = function
           00h set output to Invisible mode
           01h set output to LPT1
           02h set output to LPT2
           03h set output to LPT3
           04h set output to COM1
           05h set output to COM2
           06h set output to COM3
           07h set output to COM4
           08h set output to screen
           09h set output to file
           0Ah change file path
               ES:DI -> new path
               CX = length of path (max 41, but not range-checked)
           0Bh change file name
               ES:DI -> new filename
               CX = length of new name (max 41, but not range-checked)
           0Ch set redirected device
                (01h = LPT1 ... 03h = LPT3, 04h = COM1 ... 07h = COM4)
           0Dh force buffer dump
           0Eh set display color
               AL = new color attribute (see #00014 at INT 10/AH=08h)
           0Fh set popup hotkey
               AL = hotkey scancode
           10h toggle byte display
               AL = new state (00h off, 01h on)
           11h change buffer flush delay
               AL = timer ticks before flush
Return: AX = status
            0000h successful
            0001h invalid function or nothing in buffer to be dumped
            (documented as "nonzero = error")
Program: PRINDIR is a shareware printer-redirection program by J.M. Allen
          Creations
InstallCheck:   test for the ASCIZ signature "PRINDIR N.NN" (where N.NN is the
          version number) two bytes beyond the start of the interrupt handler
Note:   prior versions of PRINDIR used INT 7A instead of INT 7C
SeeAlso: INT 7A"PRINDIR",INT 2F/AX=7F00h"PRINDIR"
Index:  hotkeys;PRINDIR
--------A-7C---------------------------------
INT 7C - AutoShade v2 - RENDERING HARDCOPY DRIVER
Note:   this is the default interrupt vector for rendering hardcopy drivers
          instead of INT 7A used by AutoCAD drivers
SeeAlso: INT 7A/AX=0001h"AutoCAD"
--------N-7C---------------------------------
INT 7C - SK-UPPS/SK-PASSPORT Data Link Interface (DLI) API
Program: SK-UPPS is the Schneider & Koch Universal Portable Protocol Stack,
          which provides an API on top of it Data Link Interface, allowing the
          use of any of several network transport layers; this product is
          called SK-PASSPORT in the USA.
InstallCheck:   test for the ASCII signature string "UPPS_DLI" immediately
          preceding the interrupt handler
Notes:  To find the service interrupt being used by the driver, an application
          should scan through the interrupt table until it finds an interrupt
          vector with the "UPPS_DLI" string.
        There may be more than one DLI loaded, each having its own service
          interrupt.
SeeAlso: AX=0000h,AX=0002h,AX=000Fh
Index:  installation check;SK-UPPS
--------N-7C0000-----------------------------
INT 7C - SK-UPPS Data Link Interface API - GET DRIVER VERSION
        AX = 0000h
Return: AH = major DLI version
        AL = minor DLI version
        DX = OEM signature (see #03845)
        CL = DLI 2.8+ topology: 1=Ethernet, 2=FDDI, 3=Token-Ring
SeeAlso: AX=0002h,AX=000Bh,AX=000Dh,AX=000Eh

(Table 03845)
Values for SK-UPPS Data Link Interface OEM signature (defined by SK):
 0001h          experimental
 3343h  ('3C')  3COM
 4942h  ('IB')  IBM
 4943h  ('IC')  Intellicom
 494Eh  ('IN')  Intel
 4B4Fh  ('KO')  Kodiak
 4D41h  ('MA')  Madge
 4E45h  ('NE')  Novell
 4F43h  ('OC')  Olicom
 5349h  ('SI')  Siemens
 534Bh  ('SK')  Schneider & Koch (SysKonnect)
 5744h  ('WD')  Western Digital
--------N-7C0001-----------------------------
INT 7C - SK-UPPS Data Link Interface API - DOWN DRIVER
        AX = 0001h
Return: AX = completion code (see #03846)
Note:   the DLI will refuse to unload if there are any protocols
          (see AX=0007h) or clients (see AX=0010h) active.
Index:  uninstall;SK-UPPS Data Link Interface

(Table 03846)
Values for SK-UPPS completion code:
 0000h  SUCCESS
 0005h  INVALID_MULTICAST
 0006h  BUFFER_TOO_SMALL
 0007h  NO_BUFFERS_LEFT
 0008h  NO_RESOURCES_LEFT
 000Bh  ILLEGAL_PROTOCOL_ID
 000Ch  PROTOCOL_IN_USE
 000Dh  NO_MULTICAST_ADDRESS
 000Fh  PROTOCOLS_ACTIVE
 0010h  CLIENTS_ACTIVE
 001Bh  INVALID_MODE
 001Ch  MODE_NOT_SUPPORTED
 FFFFh  UNKNOWN_SERVICE
--------N-7C0002-----------------------------
INT 7C - SK-UPPS Data Link Interface API - GET DRIVER STATUS
        AX = 0002h
        ES:DI -> Status Information Block (SIB) (see #03858)
Return: AX = completion code (see #03846)
Note:   GET DRIVER INFO (AX=000Eh) should be used instead.
SeeAlso: AX=0000h,AX=000Bh,AX=000Dh,AX=000Eh
--------N-7C0003-----------------------------
INT 7C - SK-UPPS Data Link Interface API - CHANGE DRIVER ADDRESS
        AX = 0003h
        ES:DI -> new node address (6 bytes)
Return: AX = completion code (see #03846)
Note:   the DLI will refuse to change the address if any protocols
          (see AX=0007h) are active
SeeAlso: AX=0001h,AX=000Eh
--------N-7C0004-----------------------------
INT 7C - SK-UPPS Data Link Interface API - REQUEST BUFFER
        AX = 0004h
        DX = protocol ID (see AX=0007h,#03849)
Return: AX = completion code (see also #03846)
            0000h successful
                ES:BX -> Memory Buffer (Mbuf) (see #03847)
Note:   if the DLI has no free Mbufs, it will set an internal flag for the
          protocol and later call the protocol's Event Upcall with
          EV_BUFFER_AVAILABLE (see #03853,#03854) as soon as an Mbuf becomes
          available.  There will only be one "buffer available" Upcall, even
          if this function has been called several times before.
SeeAlso: AX=0005h,AX=0006h,AX=0012h,AX=0013h

Format of SK-UPPS Memory Buffer (Mbuf):
Offset  Size    Description     (Table 03847)
 00h    DWORD   -> NEXT Mbuf (linked list)
 04h    WORD    OFFSET of actual data within DATA area
 06h  2 BYTEs   reserved (currently unused)
 08h    WORD    LENGTH of actual data found in DATA area starting at OFFSET
 0Ah  2 BYTEs   reserved (currently unused)
 0Ch    DWORD   -> DATA area (size can be obtained via AX=000Eh call)
 10h    WORD    PROTOCOL ID of protocol currently "owning" the Mbuf
 12h    BYTE    IN USE flag; nonzero if Mbuf still in use by DLI (see AX=0006h)
 13h    BYTE    RECEIVE STATUS (bit 0-7 only; see AX=0007h - Receive Upcall)
--------N-7C0005-----------------------------
INT 7C - SK-UPPS Data Link Interface API - RELEASE BUFFER
        AX = 0005h
        ES:BX -> Mbuf (see #03847)
Return: nothing
SeeAlso: AX=0004h
--------N-7C0006-----------------------------
INT 7C - SK-UPPS Data Link Interface API - TRANSMIT FRAME
        AX = 0006h
        ES:BX -> Mbuf (see #03847)
Return: nothing
Notes:  The DLI will send LENGTH bytes found in the Mbuf's DATA area starting
          at OFFSET. A complete and valid frame must be stored there. The DLI
          will only copy the current node address (see AX=0003h) to the
          source node field of the frame's MAC header.
        On Ethernet, the DLI will always send a minimum of 60 bytes, regardless
          of the value found in the LENGTH field.
        This function returns immediately; the DLI will call the protocol's
          Transmit Upcall (see #03848) when the frame has been sent.
        The Mbuf's IN USE field will be non-zero until the DLI calls the
          Transmit Upcall.
SeeAlso: AX=0002h,AX=0004h,AX=0013h

(Table 03848)
Values SK-UPPS Transmit Upcall is called with:
        ES:BX -> Mbuf (NEXT field destroyed)
        interrupts disabled
Note:   On FDDI the bytes of the source and destination node fields in the MAC
          header have been bit-swapped to physical address format.
--------N-7C0007-----------------------------
INT 7C - SK-UPPS Data Link Interface API - REGISTER PROTOCOL
        AX = 0007h
        ES:BX -> Protocol Control Block (see #03849)
Return: AX = completion code (see #03846)
Program: SK-UPPS is the Schneider & Koch Universal Portable Protocol Stack,
          which provides an API on top of its Data Link Interface, allowing the
          use of any of several network transport layers
SeeAlso: AX=0008h,AX=000Bh

Format of SK-UPPS Protocol Control Block (PCB):
Offset  Size    Description     (Table 03849)
 00h    WORD    (big-endian) protocol type
 02h    WORD    protocol mode (see #03850)
 04h    DWORD   -> Receive Upcall routine (see #03851)
 08h    DWORD   -> Transmit Upcall routine
 0Ch    DWORD   -> Event Upcall routine (see #03853)
 10h    DWORD   -> ASCIZ protocol name (zero if none)
 14h    WORD    protocol ID will be returned here (always non-zero)

Bitfields for SK-UPPS protocol mode:
Bit(s)  Description     (Table 03850)
 0      promiscuous mode; protocol receives all frames regardless of their
          destination (PROTOCOL TYPE must be FFFFh)
 1      if set, protocol's Event Upcall will be called on entry and exit of the
          DLI's Interrupt Service Routine (see #03854)
 2      DLI 2.2+ hook mode; protocol receives all directed frames destined for
          this station (PROTOCOL TYPE must be FFFFh)
 3      DLI 2.3+ receive error frames (only valid in promiscuous mode (0))
 4-5    DLI 2.5+ frame type:
        00 Ethernet II; specify type code in PROTOCOL TYPE field (high-low)
        01 IEEE 802.2; specify Service Access Point (SAP) in MSB
              (offset 0) of PROCOTOL TYPE field; LSB must be zero
        10 IEEE 802.2 with SNAP header; specify type code in PROTOCOL TYPE
              field (high-low)
        11 reserved (currently unused)
 6      DLI 2.5+ if set, protocol's Event Upcall will be called with event code
          EV_BUFFER_WANTED, when DLI runs out of Mbufs
 7      DLI 2.7+ chain mode; if set, client allows the specified frame type to
          be shared with other clients
 8      DLI 2.8+ receive non-LLC frames rather than LLC frames
 9      DLI 2.8+ receive all multicast frames (see also AX=0009h)
 10-15  reserved (currently unused; must be zero)
Notes:  If PROTOCOL TYPE is FFFFh and neither the "promiscuous" nor the "hook"
          mode is set, the protocol receives all frames that did not match
          any registered frame type (demultiplexor mode).
        Protocols using "promiscuous", "hook" or "chain" mode should always
          return from the Receive Upcall with the received Mbuf in ES:BX and
          the Carry Flag set. The DLI will then pass the Mbuf to the FEED BACK
          BUFFER function (see AX=000Fh).
        Some DLIs do not support all or even any of the "promiscuous",
          "receive non-LLC" and "receive all multicasts" mode bits.
SeeAlso: #03849

(Table 03851)
Values SK-UPPS Receive Upcall is called with:
        ES:BX -> Mbuf
        AX = receive status (see #03852) (also stored in Mbuf's RECEIVE STATUS field)
        interrupts disabled
Return: nothing
SeeAlso: #03853

Bitfields for SK-UPPS receive status:
Bit(s)  Description     (Table 03852)
 0-2    reserved (0), currently unused
 3      frame check sequence (FCS) error
 4      overflow (frame too long)
 5      framing error
 6      reserved (0), currently unused
 7      non-LLC frame (see #03850 [bit 8])
 8-15   reserved (0), currently unused
Notes:  The protocol's Receive Upcall routine will be called whenever a frame
          matching the specified frame type is received. A received frame is
          passed to the protocol in the Mbuf's DATA area at OFFSET and its size
          is LENGTH bytes.
        The receive status passed to the Receive Upcall in register AL is
          always zero, except for protocols using "non-LLC" mode (8 of PCB's
          protocol mode field) or "promiscuous" mode together with "receive
          error frames" (0 & 3).
        Upcalls are FAR routines and must return with a RET FAR. If the Carry
          Flag is set on return from a Receive or Transmit Upcall, then ES:BX
          must point to an Mbuf, which the DLI will then pass to the RELEASE
          BUFFER function (see AX=0005h). See also notes for PROTOCOL MODE.

(Table 03853)
Values SK-UPPS Event Upcall is called with:
        AX = event code (see #03854)
Return: nothing
Note:   All Event Upcalls may be ignored by the protocol.
SeeAlso: #03851

(Table 03854)
Values for SK-UPPS Event Upcall event code:
 00h    EV_BUFFER_AVAILABLE client may now call REQUEST BUFFER (AX=0004h)
 01h    EV_ISR_START        start of Interrupt Service Routine
 02h    EV_ISR_END          end of ISR (see #03850 [bit 1])
 03h    EV_BUFFER_WANTED    DLI temporarily out of Mbufs
 04h    EV_NETWORK_STATUS   DLI 2.8+ network status -- DX=status (see #03855)
 05h    EV_IO_CONTROL       DLI 2.8+ I/O control -- DX=subfunc (see AX=0016h)
SeeAlso: #03853

Bitfields for EV_NETWORK_STATUS in register DX:
Bit(s)  Description     (Table 03855)
        Token-Ring              FDDI
 15     SIGNAL_LOSS             SIGNAL_LOSS
 14     HARD_ERROR              HARD_ERROR
 13     SOFT_ERROR              SOFT_ERROR
 12     TRANSMIT_BEACON         TRANSMIT_BEACON
 11     LOBE_WIRE_FAULT         PATH_TEST_FAILED
 10     AUTO_REMOVAL            SELF_TEST_REQUIRED
 9      reserved                reserved
 8      REMOVE_RECEIVED         REMOTE_DISCONNECT
 7      COUNTER_OVERFLOW        reserved
 6      SINGLE_STATION          DUPLICATE_ADDRESS
 5      RING_RECOVERY           NO_RING_OP_STATUS
 4      reserved                VERSION_MISMATCH
 3      reserved                STUCK_BYPASS
 2      reserved                FDDI_EVENT
 1      reserved                RING_OP_CHANGE
 0      reserved                reserved
Note:   EV_NETWORK_STATUS is not supported on Ethernet
--------N-7C0008-----------------------------
INT 7C - SK-UPPS Data Link Interface API - DISABLE PROTOCOL
        AX = 0008h
        BX = protocol ID (see #03849)
Return: AX = completion code (see #03846)
Note:   the DLI will handle any Mbufs given to TRANSMIT FRAME (AX=0006h) as if
          they had been given to TRANSMIT FRAME RELEASE (AX=0013h).
        all multicast addresses registered for this protocol will be disabled.
        after this function returns, the protocol's Upcall routines will no
          longer be called.
SeeAlso: AX=0007h,AX=000Bh
--------N-7C0009-----------------------------
INT 7C - SK-UPPS Data Link Interface API - REGISTER MULTICAST
        AX = 0009h
        BX = protocol ID (see #03849)
        ES:DI -> multicast address (6 bytes)
Return: AX = completion code (see #03846)
Notes:  The broadcast address is always enabled.
        Set bit 9 of PCB's protocol mode field in REGISTER PROTOCOL call
          (AX=0007h) to receive all multicast frames.
SeeAlso: AX=000Ah,AX=0014h
--------N-7C000A-----------------------------
INT 7C - SK-UPPS Data Link Interface API - DISABLE MULTICAST
        AX = 000Ah
        BX = protocol ID (see #03849)
        ES:DI -> multicast address (6 bytes)
Return: AX = completion code (see #03846)
SeeAlso: AX=0009h,AX=0014h
--------N-7C000B-----------------------------
INT 7C - SK-UPPS Data Link Interface API - GET PROTOCOL LIST
        AX = 000Bh
        ES:DI -> protocol ID buffer
        CX = number of 2-byte protocol IDs that may be stored in buffer
Return: AX = completion code (see #03846)
        CX = number of active protocols (regardless of value returned in AX)
        protocol ID buffer filled with active protocol IDs
Program: SK-UPPS is the Schneider & Koch Universal Portable Protocol Stack,
          which provides an API on top of its Data Link Interface, allowing the
          use of any of several network transport layers
Note:   If the buffer supplied is too small, CX still contains the total number
          of active protocols and the buffer has been filled until full.
SeeAlso: AX=000Ch,AX=0014h
--------N-7C000C-----------------------------
INT 7C - SK-UPPS Data Link Interface API - GET PROTOCOL STATUS
        AX = 000Ch
        BX = protocol ID (see #03849,AX=000Bh)
        ES:DI -> Protocol Status Block (see #03856)
Return: AX = completion code (see #03846)
SeeAlso: AX=000Bh,AX=0014h

Format of SK-UPPS Protocol Status Block (PSB):
Offset  Size    Description     (Table 03856)
 00h    DWORD   -> ASCIZ protocol name
 04h    WORD    protocol mode (see #03850)
 06h    WORD    protocol type (see AX=0007h)
 08h    WORD    number of registered multicasts (see AX=0009h,AX=0014h)
--------N-7C000D-----------------------------
INT 7C - SK-UPPS Data Link Interface API - GET DRIVER STATISTICS
        AX = 000Dh
        BX = flag: 0=don't clear statistics, 1=clear statistics
        ES:DI -> Statistics Data Block (see #03857)
Return: AX = completion code (see #03846)
SeeAlso: AX=0002h,AX=0015h

Format of SK-UPPS Statistics Data Block (SDB):
Offset  Size    Description     (Table 03857)
 00h    DWORD   node uptime in ticks (1/18.21 sec.)
 04h    DWORD   bytes received
 08h    DWORD   bytes transmitted
 0Ch    DWORD   frames received
 10h    DWORD   frames transmitted
 14h    DWORD   multicast bytes received
 18h    DWORD   multicast frames received
 1Ch    DWORD   unrecognized frames
 20h    WORD    missed frames
 22h    WORD    frame check sequence (FCS) errors
 24h    WORD    framing errors
 26h    WORD    babbling errors
 28h    WORD    late collision errors
 2Ah    WORD    loss of carrier errors
 2Ch    WORD    16 retries failed errors
 2Eh    WORD    overflow errors
Note:   fields 26h through 2Ch are always zero, except in some very old
          versions of the DLI.  Use GET MEDIA STATISTICS (AX=0015h) to get
          more detailed information.
--------N-7C000E-----------------------------
INT 7C - SK-UPPS Data Link Interface API - DLI 2.5+ - GET DRIVER INFO
        AX = 000Eh
        ES:DI -> Driver Information Block (see #03858)
        BX = offset of 1st field within DIB to be returned
        CX = number of bytes to be returned
Return: AX = completion code (see #03846)
        CX = number of bytes copied (regardless of value returned in AX)
Program: SK-UPPS is the Schneider & Koch Universal Portable Protocol Stack,
          which provides an API on top of its Data Link Interface, allowing the
          use of any of several network transport layers
SeeAlso: AX=0000h,AX=0002h,AX=000Bh,AX=000Dh,AX=0015h

Format of SK-UPPS Driver Information Block (DIB):
Offset  Size    Description     (Table 03858)
 00h  6 BYTEs   physical node address (from adapter's ROM)
 06h  6 BYTEs   current node address (see AX=0003h)
 0Ch    BYTE    adapter id (defined by OEM)
 0Dh    BYTE    IRQ line (FFh if none)
 0Eh    DWORD   -> shared memory (zero if none)
 12h    DWORD   size of shared memory (zero if none)
 16h    WORD    base I/O port (zero if none)
 18h    BYTE    DMA line (FFh if none)
 19h    BYTE    DLI 2.4+ topology (see AX=0000h)
 1Ah    WORD    size of an Mbuf's DATA area (see #03847)
 1Ch  2 BYTEs   reserved (currently unused)
 1Eh    WORD    total number of Mbufs the DLI has
 20h    WORD    maximum number of Mbufs that can be allocated via REQUEST
                  BUFFER (AX=0004h) and SYNC REQUEST BUFFER (AX=0012h)
 ---- end of Status Information Block returned by GET DRIVER STATUS (AX=0002h)
 22h    DWORD   -> ASCIZ adapter name
 26h    WORD    number of I/O ports used (zero if none)
 28h    DWORD   line speed in bits/sec.
--------N-7C000F-----------------------------
INT 7C - SK-UPPS Data Link Interface API - FEED BACK BUFFER
        AX = 000Fh
        ES:BX -> Mbuf (see #03847)
Return: nothing
Notes:  A protocol may call this function instead of returning the Mbuf
          directly from the Receive Upcall if it is running in "promiscuous",
          "hook" or "chain" mode.
SeeAlso: AX=0007h
--------N-7C0010-----------------------------
INT 7C - SK-UPPS Data Link Interface API - CLIENT HOOK
        AX = 0010h
Return: nothing
Notes:  An application having no active protocols may call this function to
          prevent the DLI from unloading.
SeeAlso: AX=0001h,AX=0011h
--------N-7C0011-----------------------------
INT 7C - SK-UPPS Data Link Interface API - CLIENT UNHOOK
        AX = 0011h
Return: nothing
Program: SK-UPPS is the Schneider & Koch Universal Portable Protocol Stack,
          which provides an API on top of its Data Link Interface, allowing the
          use of any of several network transport layers
SeeAlso: AX=0010h
--------N-7C0012-----------------------------
INT 7C - SK-UPPS Data Link Interface API - SYNC REQUEST BUFFER
        AX = 0012h
        DX = protocol ID (see #03849)
Return: AX = completion code (see #03846)
        if AX=0000h: ES:BX -> Mbuf (see #03847)
Note:   If the protocol wants to be informed when an Mbuf becomes available,
          REQUEST BUFFER (AX=0004h) should be used instead.
SeeAlso: AX=0004h,AX=0005h,AX=0006h,AX=0013h
--------N-7C0013-----------------------------
INT 7C - SK-UPPS Data Link Interface API - TRANSMIT FRAME RELEASE
        AX = 0013h
        ES:BX -> Mbuf (see #03847)
Return: nothing
Notes:  Returns immediately; The protocol's Transmit Upcall will NOT be called.
        The Mbuf may no more be used by the protocol in any way (i.e. the
          Mbuf's IN USE field may not be polled).
SeeAlso: AX=0004h,AX=0013h
--------N-7C0014-----------------------------
INT 7C - SK-UPPS Data Link Interface API - GET MULTICAST LIST
        AX = 0014h
        BX = protocol ID (see #03849,AX=000Bh)
        ES:DI -> multicast address buffer
        CX = number of 6-byte multicast addresses that may be stored in buffer
Return: AX = completion code (see #03846)
        CX = number of registered multicast addresses for this protocol
          (regardless of value returned in AX)
        multicast address buffer filled with multicast addresses registered for
          this protocol
Note:   If the buffer supplied is too small, CX still contains the total number
          of registered multicast addresses for this protocol and the buffer
          has been completely filled
SeeAlso: AX=000Bh,AX=0009h,AX=000Ch
--------N-7C0015-----------------------------
INT 7C - SK-UPPS Data Link Interface API - DLI 2.6+ - GET MEDIA STATISTICS
        AX = 0015h
        ES:DI -> media-specific statistics buffer (see #03859,#03860,#03861)
        BX = offset of 1st field within MSS to be returned
        CX = number of bytes to be returned
Return: AX = completion code (see #03846)
        CX = number of bytes copied (regardless of value returned in AX)
Note:   not supported by all DLIs (will return AX=FFFFh if not supported).
SeeAlso: AX=0000h,AX=000Dh

Format of SK-UPPS media-specific statistics for Ethernet:
Offset  Size    Description     (Table 03859)
 00h    DWORD   alignment errors
 04h    DWORD   frame check sequence (FCS) errors
 08h    DWORD   single collision frames
 0Ch    DWORD   multiple collision frames
 10h    DWORD   signal quality error (SQE) test errors
 14h    DWORD   deferred transmissions
 18h    DWORD   late collisions
 1Ch    DWORD   excessive collisions
 20h    DWORD   internal MAC transmit errors
 24h    DWORD   carrier sense errors
 28h    DWORD   excessive deferrals
 2Ch    DWORD   frame too longs
 30h    DWORD   in range length errors
 34h    DWORD   out of range length fields
 38h    DWORD   internal MAC receive errors

Format of SK-UPPS media-specific statistics for FDDI:
Offset  Size    Description     (Table 03860)
 00h    DWORD   SMT operating version id (refer to ANSI 7.1.2.2)
 04h    DWORD   SMT CF state: 1=Isolated, 2= Wrap_S, 3=Wrap_A, 4=Wrap_B,
                  5=Wrap_AB, 6=Thru (refer to ANSI SMT 9.7.4.3)
 08h    DWORD   SMT frames sent
 0Ch    DWORD   SMT frames received
 10h    DWORD   SMT ring up count
 14h  6 BYTEs   MAC upstream neighbour
 1Ah  6 BYTEs   MAC downstream neighbour
 20h    DWORD   MAC frame counter (refer to ANSI MAC 2.2.1)
 24h    DWORD   MAC error counter ( " )
 28h    DWORD   MAC lost counter ( " )
 2Ch    BYTE    port 1 link error estimate (ranges from 10**-4 to 10**-15 and
                  is reported as the absolute value of the exponent)
 2Dh    BYTE    port 2 link error estimate ( " )
 2Eh  2 BYTEs   reserved (currently unused)
 30h    DWORD   attachment class: 1=single-attachment (S PORT),
                  2=dual-attachment (A/B PORT pairs), 3=concentrator (M PORTs)
 34h    DWORD   attachment optical bypass present: 1=true, 2=false

Format of SK-UPPS media-specific statistics for Token-Ring:
Offset  Size    Description     (Table 03861)
 00h  6 BYTEs   upstream neighbour
 06h    WORD    local ring number
 08h    DWORD   ring up count
 0Ch    DWORD   signal loss errors
 10h    DWORD   lobe wire faults
 14h    DWORD   ring recovery count
 18h    DWORD   line errors
 1Ch    DWORD   burst errors
 20h    DWORD   ARI/FCI errors
 24h    DWORD   lost frame errors
 28h    DWORD   receive congestion errors
 2Ch    DWORD   frame copied errors
 30h    DWORD   token errors
 34h    DWORD   DMA bus errors
 38h    DWORD   DMA parity errors
 3Ch    DWORD   receive overflow errors
--------N-7C0016-----------------------------
INT 7C - SK-UPPS Data Link Interface API - DLI 2.8+ - DRIVER I/O CONTROL
        AX = 0016h
        DX = subfunction; bits 14-15 specify direction of I/O:
                00 no data at all (ES:BX undefined)
                01 driver -> application (GET)
                10 application -> driver (SET)
                11 both directions (GET/SET)
        ES:BX -> I/O buffer (optional)
        CX = size of buffer (if ES:BX valid)
Return: AX = completion code; defined by OEM
Program: SK-UPPS is the Schneider & Koch Universal Portable Protocol Stack,
          which provides an API on top of its Data Link Interface, allowing the
          use of any of several network transport layers
Notes:  not supported by all DLIs (will return AX=FFFFh if not supported)
        subfunction codes are defined by OEMs
SeeAlso: AX=0001h
--------N-7C0017-----------------------------
INT 7C - SK-UPPS Data Link Interface API - DLI 2.8+ - INTERRUPT REQUEST
        AX = 0017h
Return: AX = completion code (see #03846)
Notes:  not supported by all DLIs (will return AX=FFFFh, if not supported).
        must be called with interrupts disabled; when the client re-enables
          interrupts, an interrupt will be generated and reported to the client
          through an Event Upcall (see #03853 [EV_ISR_START/EV_ISR_END])
SeeAlso: AX=0007h
--------t-7D---------------------------------
INT 7D O - [obsoleted proposal] - ALTERNATE MULTIPLEX INTERRUPT
Note:   this interface has been moved to INT 2D; there are no known
          implementations on INT 7D
SeeAlso: INT 2D"AMIS",INT 2F"NOTES"
--------S-7D---------------------------------
INT 7D U - YTERM 1.4 - CLOCK SUPPORT
SeeAlso: INT 7E"YTERM"
--------E-7D---------------------------------
INT 7D - DJGPP GO32.EXE DOS EXTENDER - RELOCATED IRQ5
Notes:  this vector is overwritten when GO32 starts but is not restored by
          early versions of the extender
        the newest versions of GO32 dynamically allocate the vectors used
          for the relocated IRQs, much as DESQview does (see INT 50"DESQview")
SeeAlso: INT 0D"IRQ5",INT 7C"GO32",INT 7E"GO32"
--------U-7D---------------------------------
INT 7D - HyperPAD v2.2 - API ACCESS
Note:   this vector is hooked but immediately passed on (without checking
          whether the previous handler was 0000h:0000h).  The sole purpose of
          this vector is to provide the address of the data area described
          below (see #03862).

Format of HyperPAD data area:
Offset  Size    Description     (Table 03862)
 -16h   DWORD   pointer to ??? FAR function
 -12h   DWORD   pointer to callback setting function
                [C calling conventions, (*callback)(int (_loadds far *)()) ]
 -0Eh 6 BYTEs   signature "BRC001"
 -08h   DWORD   pointer to previous INT 7D handler
 -04h   DWORD   pointer to ??? data
 00h            HyperPAD INT 7D handler
----------7D---------------------------------
INT 7D - IBM DOS 6.1 E.EXE - ???
Note:   E.EXE checks whether this interrupt is in use (not 0000h:0000h),
          and if it is used, attempts to load E55VGA.EX instead of the
          default E.EX overlay.  However, E55VGA.EX is not included in
          IBM DOS 6.1.
--------G-7D00-------------------------------
INT 7D - SCSILink - RESET SCSI BUS
        AH = 00h
Program: SCSILink is a TSR by Cross Products Ltd which allows its PC-hosted
          cross assemblers and similar products to communicate with Cross
          Products hardware debuggers
Desc:   reset all devices on the SCSI bus
InstallCheck:   test for the signature "SCSILINK" immediately prior to the
          interrupt handler
Index:  installation check;SCSILink
--------G-7D01-------------------------------
INT 7D - SCSILink - CONNECT TO TARGET
        AH = 01h
        AL = target ID
Return: CF clear if successful
        CF set on error
            AL = initiator error
            AH = target error
Desc:   arbitrate the use of the bus and select the specified target device
--------G-7D02-------------------------------
INT 7D - SCSILink - SEND COMMAND
        AH = 02h
        ES:BX -> parameter block (see #03863)
Return: CF clear if successful
        CF set on error
            AL = initiator error
            AH = target error
Desc:   send the specified command block to the target device and perform any
          related I/O

Format of SCSILink parameter block:
Offset  Size    Description     (Table 03863)
 00h    DWORD   size of command block
 04h    DWORD   address of command block (see #03864)
 08h    DWORD   size of buffer
 0Ch    DWORD   address of buffer

Format of SCSILink command block:
Offset  Size    Description     (Table 03864)
 00h            info not yet available
--------G-7D03-------------------------------
INT 7D - SCSILink - SET TIMEOUT
        AH = 03h
        AL = timeout selector (see #03865)
        BX = new value in 55ms ticks
Desc:   change an internal timeout value to allow communication with very
          slow targets

(Table 03865)
Values for SCSILink timeout selector:
 00h    time to wait for bus (default 18)
 01h    time to wait for new phase (default 5)
 02h    maximum time to send/receive block (default 18)
 03h    time to wait for reselect (default 180)
--------G-7D04-------------------------------
INT 7D - SCSILink - GET ERROR STRING
        AH = 04h
        AL = error number
Return: ES:BX -> ASCIZ error string for error number
--------G-7D05-------------------------------
INT 7D - SCSILink - GET ADDRESS
        AH = 05h
Return: AL = DMA channel
        AH = initiator ID
        BX = card address
Desc:   determine the current hardware configuration
--------G-7D06-------------------------------
INT 7D - SCSILink - PUT DATA
        AH = 06h
        CX = number of bytes to store (0001h-0100h)
        ES:BX -> data to be saved
Return: CF clear if successful
        CF set on error
            AL = error code (01h = too much data)
Note:   the specified data is stored in SCSILink's PSP
SeeAlso: AH=07h
--------G-7D07-------------------------------
INT 7D - SCSILink - GET DATA
        AH = 07h
        CX = number of bytes to retrieve (0001h-0100h)
        ES:BX -> buffer for data
Return: CF clear if successful
        CF set on error
            AL = error code (01h = too much data)
Note:   retrieve data previously stored with AH=06h
SeeAlso: AH=06h
--------G-7D08-------------------------------
INT 7D - SCSILink - TERMINATE SESSION
        AH = 08h
Desc:   indicate to any other programs that intercept INT 7D that the program
          has finished with the link
Note:   the program should call this function even if a SCSI error caused its
          termination
--------G-7D09-------------------------------
INT 7D - SCSILink - POLL REQUEST
        AH = 09h
        AL = target ID
Return: AL = status
            FEh resident driver experienced SCSI error
            FFh resident driver handleded event
Desc:   give any drivers chained onto INT 7D a chance to handle an exception
          not specifically handled by the calling program
Notes:  this service exists so that resident disk servers, etc. can continue
          running even while debuggers and profilers are active
        the resident driver assumes that a connection has been established and
          attempts to leave the target connected
--------*-7E---------------------------------
INT 7E - RESERVED FOR DIP, Ltd. ROM LIBRARY
--------S-7E---------------------------------
INT 7E U - YTERM 1.4 - ???
SeeAlso: INT 7D"YTERM",INT 7F"YTERM"
--------E-7E---------------------------------
INT 7E - DJGPP GO32.EXE DOS EXTENDER - RELOCATED IRQ6
Program: GO32.EXE is a DOS extender included as part of the 80386 port of the
          GNU C/C++ compiler by DJ Delorie and distributed as DJGPP
Notes:  this vector is overwritten when GO32 starts but is not restored by
          early versions of the extender
        the newest versions of GO32 dynamically allocate the vectors used
          for the relocated IRQs, much as DESQview does (see INT 50"DESQview")
SeeAlso: INT 0E"IRQ6",INT 7D"GO32",INT 7F"GO32"
--------s-7E00-------------------------------
INT 7E - MaxSBOS v0.21 - GET ???
        AH = 00h
Return: DX:AX -> ???
SeeAlso: AH=01h,AH=02h,AH=03h
--------s-7E0001-----------------------------
INT 7E - IWSBSDRV v1.41 - SEND MIDI BYTE
        AX = 0001h
        DX = game device handle
        BL = MIDI byte to send???
        ???
Return: EAX = status
            00000000h if successful
            FFFFFFFFh on error (function disabled)
Program: IWSBSDRV is the resident portion of the InterWave SBOS sound card
          emulator for the Gravis UltraSound Plug-and-Play
Note:   this function is only supported if the MIDISIMPLE device has been
          opened via the InterWave Game API (see INT 2F/AX=CD21h)
SeeAlso: AX=0002h,INT 2F/AX=CD21h,#03074
--------s-7E0002-----------------------------
INT 7E - IWSBSDRV v1.41 - SEND MIDI STRING
        AX = 0002h
        DX = game device handle
        ES:EDI -> buffer containing MIDI string to be sent
        ECX = length of buffer in bytes
Return: EAX = status
            00000000h if successful
            FFFFFFFFh on error (function disabled)
Note:   this function is only supported if the MIDISIMPLE device has been
          opened via the InterWave Game API (see INT 2F/AX=CD21h)
SeeAlso: AX=0001h,INT 2F/AX=CD21h,#03074
--------s-7E00F6-----------------------------
INT 7E - SBOS v3.82 - SET ???
        AX = 00F6h
        BL = ??? (max. 20h, value will be set to 20h if BL greater)
Return: AX=00F9h,AX=00FEh
--------s-7E00F7-----------------------------
INT 7E - SBOS v3.82 - GET ???
        AX = 00F7h
Return: AX = status
            0000h failed
            0001h successful
                BX = ??? (if nonzero, ??? is hooked) (see AX=00FFh)
                CH = ???
                CL = ???
SeeAlso: AX=00F6h,AX=00FDh,AX=00FFh
--------s-7E00F9-----------------------------
INT 7E - SBOS v3.82 - SET ???
        AX = 00F9h
        BX = ???
SeeAlso: AX=00F6h,AX=00FBh,AX=00FDh
--------s-7E00FB-----------------------------
INT 7E - SBOS v3.82 - SET ???
        AX = 00FBh
        BL = ???
SeeAlso: AX=00F6h,AX=00FDh,AX=00FFh
--------s-7E00FD-----------------------------
INT 7E - SBOS v3.82 - SET ???
        AX = 00FDh
        BL = ??? (max. 20h, value will be set to 20h if BL greater)
SeeAlso: AX=00F9h,AX=00FEh
--------s-7E00FE-----------------------------
INT 7E - SBOS v3.82 - UNINSTALL
        AX = 00FEh
Return: AX = status
            0000h successful
            00FCh unable to unhook INT 21
            00FDh unable to unhook INT 09
            00FEh unable to release memory
Program: SBOS is a SoundBlaster emulator for the Gravis UltraSound
InstallCheck:   test for the ASCII signature "SBOS" at offset 0Ah in the
          interrupt handler's segment (similar to one of the possible EMS
          installation checks)
Range:  SBOS may use INT 78-INT 7F
Note:   this function may not be called if any SBOS vectors have been hooked
SeeAlso: INT 21/AX=FD12h,INT 78"UltraMID"
--------s-7E00FF-----------------------------
INT 7E - SBOS v3.82 - SET INTERRUPT FOR ???
        AX = 00FFh
        BL = new interrupt vector to hook
Return: BX = 03CDh if supported
Desc:   unhooks the current interrupt handler for ???, and reconnects it to the
          specified new interrupt number
SeeAlso: AX=00F7h,AX=00F9h,AX=00FEh
--------s-7E01-------------------------------
INT 7E - MaxSBOS v0.21 - ???
        AH = 01h
        ???
Return: ???
Program: MaxSBOS is a SoundBlaster FM synthesis emulator for the Gravis
          UltraSound MAX
Range:  INT 78-INT 7F, selected by commandline parameter
Note:   the installation check is the same as for 'regular' SBOS (see AX=00FEh)
          although the API in v0.21 does not provide the functions present in
          the older SBOS
SeeAlso: AX=00FEh,AH=02h,AH=03h
--------s-7E02-------------------------------
INT 7E - MaxSBOS v0.21 - ???
        AH = 02h
Return: AX = FFFFh
SeeAlso: AX=00FEh,AH=01h,AH=03h
--------s-7E03-------------------------------
INT 7E - MaxSBOS v0.21 - NOP
        AH = 03h
Return: nothing
SeeAlso: AX=00FEh,AH=01h,AH=02h
--------m-7E5857BL57-------------------------
INT 7E - XLOAD - INSTALLATION CHECK
        AX = 5857h
        BL = 57h
Return: AX = 0000h if installed
Program: XLOAD is the LOADHIGH-equivalent from Helix Software's Netroom
SeeAlso: AX=5857h/BL=5Ah,AX=5857h/BL=5Bh
--------m-7E5857BL5A-------------------------
INT 7E - XLOAD - GET ???
        AX = 5857h
        BL = 5Ah
Return: AX = 0000h
        CX = ???
        DS:SI -> ???
SeeAlso: AX=5857h/BL=57h,AX=5857h/BL=5Bh
--------m-7E5857BL5B-------------------------
INT 7E - XLOAD - GET XLOAD MEMORY SIZE
        AX = 5857h
        BL = 5Bh
Return: AX = 0000h
        CX = segment of XLOAD TSR
        DX = size of memory block in which XLOAD TSR is located
SeeAlso: AX=5857h/BL=57h,AX=5857h/BL=5Ah
--------s-7E--80-----------------------------
INT 7E - IWSBSDRV v1.41 - GET ???
        AL = 80h
Return: DX:AX -> ???
SeeAlso: AL=81h,AL=82h,AL=83h,AL=84h,AL=85h,AL=86h,AL=87h
--------s-7E--81-----------------------------
INT 7E - IWSBSDRV v1.41 - ???
        AL = 81h
        ???
Return: ???
SeeAlso: AL=80h,AL=82h,AL=83h,AL=84h,AL=85h,AL=86h,AL=87h
--------s-7E--82-----------------------------
INT 7E - IWSBSDRV v1.41 - GET ???
        AL = 82h
Return: AX = ??? (FFFFh)
SeeAlso: AL=80h,AL=81h,AL=83h,AL=84h,AL=85h,AL=86h,AL=87h
--------s-7E--83-----------------------------
INT 7E - IWSBSDRV v1.41 - ??? (CALLS VIWD.VXD)
        AL = 83h
        ???
Return: ???
SeeAlso: AL=80h,AL=81h,AL=82h,AL=84h,AL=85h,AL=86h,AL=87h
SeeAlso: INT 2F/AX=1684h/BX=38DAh"VIWD"
--------s-7E--84-----------------------------
INT 7E - IWSBSDRV v1.41 - WAKE PROGRAM???
        AL = 84h
Return: AL = status
            00h successful
            else failed
SeeAlso: AL=80h,AL=81h,AL=82h,AL=83h,AL=85h,AL=86h,AL=87h
SeeAlso: INT 2F/AX=CD04h"InterWave"
--------s-7E--85-----------------------------
INT 7E - IWSBSDRV v1.41 - SET ??? FLAG
        AL = 85h
Return: nothing
SeeAlso: AL=80h,AL=81h,AL=82h,AL=83h,AL=84h,AL=86h,AL=87h
--------s-7E--86-----------------------------
INT 7E - IWSBSDRV v1.41 - HOOK INT 21
        AL = 86h
Return: AX,BX,DX,ES destroyed
SeeAlso: AL=80h,AL=81h,AL=82h,AL=83h,AL=84h,AL=85h,AL=87h
--------s-7E--87-----------------------------
INT 7E - IWSBSDRV v1.41 - RESTORE INT 21
        AL = 87h
Return: AX,DX destroyed
SeeAlso: AL=80h,AL=81h,AL=82h,AL=83h,AL=84h,AL=85h,AL=86h
--------V-7F---------------------------------
INT 7F - Halo88 - API
        BX = function number (see #03866)
        additional parameters on stack
Return: ???
Program: Halo88 is a suite of graphics routines
Note:   according to Stuart Kemp, the code appears to make no provisions for
           chaining

(Table 03866)
Values for Halo88 API function:
 64h    arc
 65h    bar
 66h    box
 67h    circle
 68h    clr
 69h    default hatch style
 6Ah    default line style
 6Bh    delhcur
 6Ch    delln / deltcur
 6Dh    ellipse
 6Eh    fill
 6Fh    flood
 70h    flood2
 71h    init graphics
 72h    init hcur
 73h    init marker
 74h    init tcur
 75h    inqarc
 76h    inqbknd
 77h    inqclr
 78h    inqerr
 79h    inqgcur
 7Ah    inqhcur
 7Bh    inqmarker
 7Dh    inqtcur
 7Eh    inqtext
 7Fh    lnabs
 80h    lnrel
 81h    markerabs
 82h    markerrel
 83h    moveabs
 84h    movehcurabs
 85h    movehcurrel
 86h    moverel
 87h    movetcurabs
 88h    movetcurrel
 89h    movefrom
 8Ah    moveto
 8Bh    pie
 8Ch    polylnabs
 8Dh    polylnrel
 8Eh    ptabs
 8Fh    ptrel
 91h    setasp
 92h    set color
 93h    set font
 94h    set hatch       style
 95h    set line style
 97h    settext
 98h    set text color
 99h    btext
 9Ah    setseg
 9Bh    display
 9Ch    setscreen
 9Eh    close graphics
 9Fh    ftinit
 A0h    ftlocate
 A1h    ftext
 A5h    set viewport
 A6h    set window
 A7h    set world
 AAh    ftcolor
 ACh    initlp
 ADh    inqasp
 AEh    inqdev
 AFh    inqdisplay
 B0h    inqft
 B1h    inqftcolor
 B2h    inqinterlace
 B3h    inqlpa
 B4h    inqlpg
 B5h    inqmode
 B6h    inqscreen
 B7h    inqversion
 B8h    roam
 B9h    scroll
 BAh    setieee
 BBh    set interlace
 BCh    shift
 BDh    start graphics
 BEh    vpan
 CBh    gwrite
 CCh    gread
 CDh    setxor
 CEh    rbox
 CFh    rcir
 D0h    rlnabs
 D1h    rlnrel
 D2h    delbox
 D3h    delcir
 D5h    setseg2
 DCh    worldoff
 DDh    mapwtod
 DEh    mapdtow
 DFh    mapwton
 E0h    mapntow
 E1h    mapdton
 E2h    mapntod
 E3h    inqworld
 E4h    inqviewport
 E5h    set line width
 E6h    lnjoint
 E7h    set locator
 E8h    read locator
 E9h    setdev
 EBh    setstext
 ECh    setstclr
 EDh    setstang
 EEh    stext
 EFh    inqstext
 F0h    setdegree
 F1h    inqstsize
 F2h    polyfabs
 F3h    polyfrel
 F4h    inqdrange
 F5h    inqstang
 F6h    orglocator
 F7h    inqlocator
 F8h    inqarea
 F9h    setipal
 FAh    setborder
 FBh    inqcrange
 FEh    setclip
 FFh    fcir
100h    setcrange
101h    setdrange
102h    setlattr
103h    polycabs
104h    polycrel
108h    memcom
109h    memexp
10Ah    memmov
10Eh    movefx
10Fh    movetx
110h    inqrgb
111h    save image
112h    restore image
113h    setapal
114h    setxpal
118h    inqtsize
12Eh    gprint
130h    setprn
131h    setpattr
133h    setbattr
135h    pexpand
136h    ptnorm
137h    pfnorm
13Bh    inqprn
13Ch    lopen
13Dh    lclose
13Eh    lappend
13Fh    lrecord
140h    lswitch
142h    inqfun
15Dh    lsetup
15Eh    lrest
15Fh    lsave
--------N-7F---------------------------------
INT 7F - CONVERGENT TECHNOLOGIES ClusterShare CTOS ACCESS VECTOR
        AL = request ID
            01h "Request"/"RequestDirect"
                ES:BX -> pRq
                DX ignored
            04h "Wait"
                ES:BX -> ppMsgRet
                DX = exchange
            05h "AllocExch"
                ES:BX -> pExchRet
            06h "DeAllocExch"
                DX = exchange
            07h "Check"
                ES:BX -> ppMsgRet
                DX = exchange
        CX = 4354h ('CT')
Return: AX = status
            0000h successful
--------S-7F---------------------------------
INT 7F - Telebit ACS SERIAL I/O
        ES:SI-> parameter block (see #03867)
Return: CF set on error
        CF clear on success
InstallCheck:   test for the signature "PDGATEWRKSTNIF" just prior to the
          interrupt handler
Index:  installation check;Telebit ACS Serial I/O

Format of Telebit ACS parameter block:
Offset  Size    Description     (Table 03867)
 00h    BYTE    command (see #03868)
 01h    BYTE    gateway number
 02h    BYTE    reserved
 03h    BYTE    port
 04h 17 BYTEs   auxiliary buffer
 15h    BYTE    session
 16h    WORD    count of bytes passed to API
 18h    DWORD   buffer pointer passed to/from API
 1Ch    WORD    count of bytes passed from API
 1Eh    BYTE    return code (see #03869)

(Table 03868)
Values for Telebit ACS command:
 3Ch    status
 3Dh    connect
 3Eh    disconnect
 3Fh    read
 40h    data/command write
 41h    clear receive buffer
 42h    get configuration
 43h    get receiver status
 44h    raw write
 45h    search servers
 46h    set transmit buffer size

(Table 03869)
Values for Telebit ACS return code:
 00h    success
 01h    invalid session
 05h    servername invalid
 06h    NetWare fileserver bindery is locked
 07h    communication server not active
 08h    general failure in NetWare fileserver
 09h    not logged into a fileserver
 10h    connection table full
 11h    no response from communication server
 12h    connection attempt terminated abnormally
 13h    connection refused - no sessions available
 14h    gateway number/port already in use
 15h    invalid connection response
 16h    port invalid
 17h    incorrect version in server response
 18h    gateway number/port combination not configured
 19h    initialization has not been completed
 20h    no more sockets are available
 21h    no active poolname
 23h    FATAL internal interface error
 24h    registration of host workstation failed - name is already in use
 25h    registration of host workstation failed - workstation name table full
 26h    registration of host workstation failed - only one session may be
          registered for dial-in
 FFh    Telebit ACS API is busy - retry later
--------N-7F---------------------------------
INT 7F - Non-dedicated NetWare 2.x File Server - ENTER CONSOLE MODE
InstallCheck:   test for the signature "Lynn" in the four bytes preceding the
          interrupt handler; if present, the current program is running as a
          DOS task on a non-dedicated NetWare 2.x file server.
Note:   Before placing the server into "console" mode, it is recommended that
          NetWare broadcast messages be disabled with INT 21/AH=DEh/DL=00h.
SeeAlso: INT 21/AH=DEh/DL=04h
Index:  installation check;non-dedicated NetWare server
--------S-7F---------------------------------
INT 7F U - YTERM - ???
SeeAlso: INT 7E"YTERM"
--------E-7F---------------------------------
INT 7F - DJGPP GO32.EXE DOS EXTENDER - RELOCATED IRQ7
Notes:  this vector is overwritten when GO32 starts but is not restored by
          early versions of the DOS extender
        the newest versions of GO32 dynamically allocate the vectors used
          for the relocated IRQs, much as DESQview does (see INT 50"DESQview")
SeeAlso: INT 0F"IRQ7",INT 7E"GO32"
----------7F---------------------------------
INT 7F - Canon IXHND2 Scanner Interface
--------U-7F---------------------------------
INT 7F - SBS WinRun 1.00 - TRANSMITTER ENTRY POINT
        DS:SI -> WinRun control block (WCB) (see #03870)
Return: WinRun receiver status returned in WCB
Program: WinRun is a DOS/Windows utility written by Sven B. Schreiber to start
          Windows applications from a virtual DOS machine under Windows
Note:   The WinRun transmitter (WINRUN-T.COM) and receiver (WINRUN-R.EXE) need
          to be up and running

Format of the WinRun control block (WCB):
Offset  Size    Description     (Table 03870)
 00h    DWORD   pointer to ASCIZ command string
 04h    WORD    (ret) WinRun receiver status
                0000h-001Fh WinExec() error
                0020h-FFFEh WinExec() instance handle
                FFFFh       Windows not running or WinRun receiver not
                                  installed
--------N-7F---------------------------------
INT 7F - Alloy 386/MultiWare (MW386), Novell-Type Network Executive (NTNX)
Notes:  the words at C800h:0000h and C800h:0002h will both be 584Eh if the
          MW386 multitasking system is present (i.e. signature "NXNX")
        NTNX allows its API to be placed on a different interrupt than 7Fh at
          load time.  To determine the actual vector used, open the device
          "SPOOLER" with INT 21/AX=3D02h, place it in RAW mode with
          INT 21/AX=4400h and INT 21/AX=4401h, then read one byte which will
          be the actual interrupt number being used; the other interrupts may
          be found with INT 7F/AH=09h/CL=03h
--------N-7F---------------------------------
INT 7F - Alloy NetWare Support Kit (ANSK) v2.2+ - INSTALLATION CHECK
Note:   a program may determine that it is running on an ANSK Slave by checking
          the five bytes at F000h:0000h for the ASCIZ signature "ANSK"; this
          address is RAM, and should not be written.  However, the above check
          will not work on Slaves with <1MB RAM or those using the SLIM.SYS
          device driver
--------N-7F00-------------------------------
INT 7F - Alloy NTNX, MW386 - SEMAPHORE LOCK AND WAIT
        AH = 00h
        DS:DX -> ASCIZ semaphore name (max 64 bytes)
Return: AL = status (see #03871)
        AH = semaphore owner if status=02h
SeeAlso: AH=01h,AH=02h,AH=41h,INT 67/AH=00h

(Table 03871)
Values for Alloy function status:
 00h    successful
 01h    invalid function
 02h    semaphore already locked
 03h    unable to lock/unlock semaphore
 04h    semaphore space exhausted
 05h    host/target PC did not respond (NTNX)
--------T-7F00-------------------------------
INT 7F - MultiLink Advanced v1.0+ - ENQUEUE SYSTEM RESOURCE
        AH = 00h
        BX = resource identifier
        AL = wait flag
Return: AL = status
            00h successful
            01h resource not available
            02h user error
InstallCheck:   ensure that the interrupt vector is not pointing at segment
          0000h, then test whether the byte at offset 0000h in the interrupt
          handler's segment is E9h
Notes:  function will not return until the resource is available if AL is
          nonzero on entry
        a maximum of 100 resources may be enqueued at once
SeeAlso: AH=01h"MultiLink"
--------N-7F00-------------------------------
INT 7F - G8BPQ v4.07+ - GET NODE/SWITCH VERSION AND DESCRIPTION
        AH = 00h
        ES:SI -> buffer for "USERS" text string
Return: AX = 4250h ('BP') if installed
        BX = 5120h ('Q ') if installed
        DX = version number (DH = major, DL = minor)
        CX = length of returned string
Program: the G8BPQ AX25 Networking Package is amateur packet radio software by
          John Wiseman which allows a PC to act as a node in an AX.25 network
SeeAlso: AH=01h"G8BPQ",AH=09h"G8BPQ"
--------N-7F01-------------------------------
INT 7F - Alloy NTNX, MW386 - SEMAPHORE LOCK
        AH = 01h
        DS:DX -> ASCIZ semaphore name (max 64 bytes)
Return: AL = status (see #03871)
        AH = semaphore owner if status=02h
SeeAlso: AH=00h,AH=02h,AH=41h
--------T-7F01-------------------------------
INT 7F - MultiLink Advanced v1.0+ - DEQUEUE SYSTEM RESOURCE
        AH = 01h
        BX = resource identifier
Return: AL = status
            00h successful
            02h user error
Note:   the indicated resource may be dequeued even if it was enqueued by
          another task
SeeAlso: AH=00h"MultiLink",AH=02h"MultiLink"
--------V-7F01-------------------------------
INT 7F - TIGA Communications Driver v2.05 - GET ENTRY POINTS
        AH = 01h
Return: BX = 1234h if installed
            DX:AX -> array of FAR entry points
            CH = driver major version
            CL = driver minor version
Note:   TIGACD 2.05 returns CF set on unrecognized functions in AX
SeeAlso: AX=1234h,AX=4321h
--------N-7F01-------------------------------
INT 7F - G8BPQ v4.00+ - HOST MODE - SET APPLICATION FLAGS AND MASK
        AH = 01h
        AL = stream number (01h-40h)
        CL = new application flags
            bit 7: monitored frames available via AH=0Bh"G8BPQ"
        DL = new application mask
Program: the G8BPQ AX25 Networking Package is amateur packet radio software by
          John Wiseman which allows a PC to act as a node in an AX.25 network
Range:  INT 00h to INT FFh, set in configuration file BPQCFG.TXT for v4.03+
          (earlier versions were hard-wired for INT 7F)
SeeAlso: AH=00h"G8BPQ",AH=02h"G8BPQ",AH=0Bh"G8BPQ"
--------I-7F0104BX0000-----------------------
INT 7F - HLLAPI (IBM 3270 High-Level Language API)/LLAPI (Rabbit Low Level API)
        AX = 0104h (HLLAPI gate ID)
        BX = 0000h
        DS:SI -> parameter control block (see #03872)
Return: parameter control block updated
InstallCheck:   for the Novell HLLAPI TSR, test for the signature "CXI" (for
          the company Novell bought) immediately prior to the interrupt handler
SeeAlso: AX=0105h,AX=ABCDh

Format of HLLAPI parameter control block:
Offset  Size    Description     (Table 03872)
 00h  3 BYTEs   signature = 'PCB'
 03h    BYTE    function number (see #03873,#03874)
 04h    WORD    segment of control string
 06h    WORD    offset of control string
 08h    WORD    length of control string, unless explicit end-of-str char set
 0Ah    BYTE    unused (IBM)
                ControlString[0] (Rabbit)
 0Bh    WORD    return code (see #03876)
 0Dh    WORD    maximum length of control string (IBM)
                unused (Rabbit)

(Table 03873)
Values for HLLAPI function number:
 00h    OEM function (Query system for Attachmate implementation)
 01h    Connect presentation space
 02h    Disconnect presentation space
 03h    Send string of keystrokes as if typed from keyboard
 04h    Wait ~60s, returns status of presentation space
 05h    Copy current presentation space into a user-defined buffer
 06h    Search presentation space for first occurrence of a specified string
 07h    Query cursor location in current presentation space
 08h    Copy part or all of current presentation space into user buffer
 09h    Set session parameters; parameters vary by vendor (see #03875)
 0Ah    Get info on sessions currently connected
 0Bh    Lock current presentation space
 0Ch    Unlock previously locked presentation space
 0Dh    Return copy of operator info area (OIA) of current presentation space
 0Eh    get attribute byte for given position in the current presentation space
 0Fh    copy string of characters to the current presentation space
 10h    workstation control functions
 11h    storage manager functions, intended primarily for BASIC applications
        (not implemented by Rabbit)
 12h    set delay period in half-second intervals
 14h    get info on level of workstation support used
 15h    reset session parameters to default values
 16h    get detailed info on the current session
 17h    start host notification to application on presentation sp or OIA update
 18h    check host update when host notification enabled
 19h    stop host notification
 1Eh    search field within current presentation space for string
 1Fh    get first positionof a selected field in the current presentation space
 20h    get length of specified field
 21h    copy string into a specified field
 22h    copy specified field into a user-defined buffer
 23h    create alternate presentation space (IBM only), don't use with BASIC
 24h    switch to alternate presentation space (IBM only), not with BASIC
 25h    display cursor in specified area (IBM only), don't use with BASIC
 26h    display alternate presentation space (IBM only), don't use with BASIC
 27h    delete alternate presentation space (IBM only), don't use with BASIC
 28h    set cursor
 29h    start Close Intercept
 2Ah    query Close Intercept
 2Bh    stop Close Intercept
 32h    start intercepting keystrokes to allow filtering
 33h    get keystrokes after turning on interception
 34h    notify operator when keystroke rejected by filter subroutine
 35h    stop intercepting keystrokes
 5Ah    send file
 5Bh    receive file
 5Ch    run a program (not implemented by Rabbit)
 5Dh    execute DOS command (not implemented by Rabbit)
 63h    change presentation space position to PC display row/col or vice versa
 65h    connect to Window Services
 66h    disconnect from Window Services
 67h    set/query window coordinates
 68h    set/query window status
 69h    change presentation space name
 78h    connect Structured Fields
 79h    disconnect Structured Fields
 7Ah    query size of communications buffer
 7Bh    allocate communications buffer
 7Ch    free communications buffer
 7Dh    get request completion state
 7Eh    read Structured Fields
 7Fh    write Structured Fields
 FFh    Get info on DCA implementation

(Table 03874)
Values for LLAPI function number:
 80h    initialize LLAPI (internal call)
 83h    set Session ID (one-character ID)
 84h    read Session ID (one-character ID)
 85h    lock 327x keyboard
 86h    unlock 327x keyboard
 87h    wait for Clear to Send
 88h    type ASCII character
 89h    type 327x key
 8Ah    read keyboard lock state
 8Fh    force screen update
 90h    view session
 91h    relinquish (suspend foreground until background becomes idle)
 92h    poke screen character
 93h    poke translated character
 94h    peek screen character
 95h    peek translated character
 96h    set cursor position
 97h    send scan code (Rabbit only)
 98h    synchronize (returns after keystroke queue empty)
 99h    type PC key (Rabbit only)

(Table 03875)
Values for HLLAPI Function 09h Session Parameters:
 ASCII          ??? (Rabbit only)
 ATTRIB         return attributes in hex
 NOATTRIB       return attributes as blanks
 CONPHYS        make physical connection
 CONLOG         only make logical connection
 EAB            copy extended attribute bytes along with data
 NOEAB          copy data only
 ESC=n          set escape character to "n" (default '@')
 EOT=n          set end of string character (default 00h)
 FPAUSE         full-duration pause
 FTNOWAIT       return immediately from functions 5Ah and 5Bh (Rabbit only)
 FTWAIT         wait for file transfer to complete (Rabbit only)
 IPAUSE         interruptable pause
 RABESC         ??? (Rabbit only)
 NORABESC       ??? (Rabbit only)
 SCANCODE       ??? (Rabbit only)
 STRLEN         use explicit string lengths
 STREOT         use terminated strings
 SRCHALL        search entire presentation space
 SRCHFROM       search from specified offset
 SRCHFRWD       search forward from position 1
 SRCHBKWD       search backward from last position in presentation space
 TIMEOUT=n      ??? (Rabbit only)
 TWAIT          wait specified time for keyboard ready
 LWAIT          wait until keyboard ready
 NWAIT          no wait
 TRON           enable tracing
 TROFF          disable tracing
 AUTORESET      send reset before sending keys with function 03h
 NORESET        don't send reset
 QUIET          don't display messages sent with INT 21/AH=09h
 NOQUIET        allow messages to be displayed
 TIMEOUT=n      set timeout in 30-second intervals, 0 = wait until ^Break
 XLATE          translate extended attribute bytes
 NOXLATE        don't translate
 NEWRET         use HLLAPI v3.0 return code conventions
 OLDRET         use HLLAPI v2.0 return code conventions

(Table 03876)
Values for Windows HLLAPI return code:
 00h    successful
 01h    Presentation Space not connected/requested size unavailable
 02h    invalid function or parameter error/invalid block ID
 03h    file transfer complete
 04h    file transfer complete (segmented)/Presentation Space busy
 05h    inhibited or keyboard locked
 06h    data truncated
 07h    invalid Presentation Space position
 08h    operation not available
 09h    system error
 0Ah    blocking error
 0Bh    resource not available
 0Ch    session stopped
 14h    undefined key combination
 15h    OIA updated
 16h    Presentation Space updated
 17h    both Presentation Space and OIA updated
 18h    no such field
 19h    no keystrokes available
 1Ah    Presentation Space or Operator Information Area changed
 1Bh    file transfer aborted
 1Ch    zero-length field
 1Eh    cursor type invalid
 1Fh    keystroke overflow
 20h    another application is already connected
 22h    message sent to host cancelled
 23h    transmission from host cancelled
 24h    lost contact with host
 25h    function successful
 26h    function incomplete
 27h    a DDM session is already connected
 28h    disconnected, but asynchronous requests still pending
 29h    buffer already in use
 2Ah    no matching request found
12Dh    invalid function number
12Eh    file not found
131h    access denied
134h    out of memory
136h    environment invalid
137h    format invalid
270Eh (9998) invalid Presentation Space ID
270Fh (9999) invalid row or column code
---Windows HLLAPI extensions---
F000h   asynchronous call already in progress
F001h   invalid asynchronous task ID
F002h   blocking call cancelled
F003h   underlying subsystem not started
F004h   unsupported application version
--------V-7F0105-----------------------------
INT 7F - IBM 8514/A Adapter Interface (HDILOAD.EXE)
        AX = 0105h
Return: CF set on error
        CF clear if successful
            CX:DX -> array of FAR pointers to entry points (see #03877)
Note:   most functions are invoked by pushing the DWORD parameter block pointer
          and then performing a FAR call via the appropriate vector of the
          entry point array, placing the FAR address of the function's
          parameter block on the top of the stack
SeeAlso: AX=0104h,AX=0106h,AX=ABCDh

(Table 03877)
Values for HDILOAD function number: (do FAR call via entry_points+4*function)
 08h    HOPEN   Open Adapter (see #03909)
 09h    HSMX    Set Mix (see #03938)
 10h    HINT    Interrupt (see #03905)
 13h    HLDPAL  Load Palette (see #03906)
 15h    HBBW    BitBLT Write Image Data (see #03892)
 17h    HBBR    BitBLT Read Image Data (see #03893)
 18h    HBBCHN  Chained Data Go (see #03891)
 19h    HBBC    BitBLT Copy Data (see #03890)
 1Dh    HQMODE  Get Current Mode (see #03915)
 20h    HRECT   Fill Rectangle (see #03917)
 22h    HCLOSE  Close Adapter and place in quiescent state (see #03898)
 30h    HINIT   Initialize State (see #03904)
 31h    HSYNC   Synchronize Adapter (see #03943)
 39h    HSPAL   Save Palette (see #03940)
 3Ah    HRPAL   Restore Palette (see #03920)
 ???    HSGQ    Set Graphics Quality (see #03929)
 ???    HSCOORD Set Coordinate Type (see #03926)
 ???    HESC    Escape, Terminate Processing (see #03903)
 ???    HSBCOL  Set Background Color (see #03921)
 ???    HSBP    Set Bit Plane Controls (see #03922)
 ???    HSCMP   Set Color Comparison Register (see #03924)
 ???    HSCOL   Set Color (see #03925)
 ???    HSHS    Set Scissors (clipping rectangle) (see #03930)
 ???    HXLATE  Assign Text Color (see #03944)
 ???    HQMODES Get Adapter Modes (see #03916)
 ???    HQDPS   Get Drawing Process State Size (see #03914)
 ???    HQDFPAL Get Default Palette (see #03913)
 ???    HQCOORD Get Coordinate Type (see #03911)
 ???    HQCP    Get Current Position (see #03912)
 ???    HSMODE  Change Mode (see #03936)
 ???    HLINE   Draw Line at Given Position (see #03907)
 ???    HCLINE  Draw Line at Current Position (see #03897)
 ???    HRLINE  Draw Line Relative from Given Position (see #03918)
 ???    HCRLINE Draw Line Relative at Current Position (see #03900)
 ???    HSLT    Set Line Type (see #03933)
 ???    HSLW    Set Line Width (see #03935)
 ???    HSLPC   Save Line Pattern Count (see #03932)
 ???    HRLPC   Restore Line Pattern Count (see #03919)
 ???    HCBBW   BitBLT Write Image Data at Current Position (see #03894)
 ???    HBAR    Begin Area (see #03889)
 ???    HEAR    End Area (see #03901)
 ???    HSPATT  Set Pattern (see #03941)
 ???    HSPATTO Set Pattern Reference Point (see #03942)
 ???    HEGS    Erase Graphics Screen (see #03902)
 ???    HSCP    Set Current Position (see #03927)
 ???    HMRK    Set Marker (see #03908)
 ???    HCMRK   Set Marker at Current Position (see #03899)
 ???    HSMARK  Set Marker Shape (see #03937)
 ???    HSCS    Set Character Set (see #03928)
 ???    HCHST   Write Character String at Given Position (see #03896)
 ???    HCCHST  Write Character String at Current Position (see #03895)
 ???    HSCELL  Set Cell Size for Alphanumeric Text (see #03923)
 ???    ABLOCKMFI Write Character/Attribute Block MFI (see #03880)
 ???    ABLOCKCGA Write Character Block CGA (see #03878)
 ???    AERASE  Erase Rectangle (see #03883)
 ???    ASCROLL Scroll Rectangle (see #03884)
 ???    ACURSOR Set Alphanumerics Cursor Position (see #03882)
 ???    ASCUR   Set Alphanumeric Cursor Shape (see #03885)
 ???    ASFONT  Set Font (see #03886)
 ???    AXLATE  Assign Alphanumeric Color (see #03888)

Format of ABLOCKCGA parameter block:
Offset  Size    Description     (Table 03878)
 00h    WORD    000Ah (length of following data)
 02h    WORD    top-left coordinate of character block
 04h    WORD    width of block
 06h    DWORD   -> block of WORDs describing characters (see #03879)
 0Ah    BYTE    length of block in characters
 0Bh    BYTE    highlight attribute
                bit 4: transparent background
                bit 5: overstrike
                bit 6: reverse video
                bit 7: underscore
SeeAlso: #03880

Bitfields for one character in ABLOCKCGA character block:
Bit(s)  Description     (Table 03879)
 3-0    foreground attribute
 7-4    background attribute
 15-8   character code

Format of ABLOCKMFI parameter block:
Offset  Size    Description     (Table 03880)
 00h    WORD    0009h (length of following data)
 02h    WORD    top-left coordinate of character block
 04h    WORD    width of block
 06h    DWORD   -> block of DWORDs describing characters (see #03881)
 0Ah    BYTE    length of block in characters
SeeAlso: #03878

Bitfields for one character in ABLOCKMFI character block:
Bit(s)  Description     (Table 03881)
 7-0    reserved
 9-8    low two bits of font number
 12     transparent background
 13     overstrike
 14     reverse video
 15     underscore
 19-16  foreground color attribute
 23-20  background color attribute
 31-24  character code

Format of ACURSOR parameter block:
Offset  Size    Description     (Table 03882)
 00h    WORD    0002h (length of following data)
 02h    BYTE    column (0-based)
 03h    BYTE    row (0-based)
SeeAlso: #03885

Format of AERASE parameter block:
Offset  Size    Description     (Table 03883)
 00h    WORD    0005h (length of following data)
 02h    BYTE    left-most column (0-based)
 03h    BYTE    top-most row (0-based)
 04h    BYTE    rectangle's width in character cells
 05h    BYTE    rectangle's height in character cells
 06h    BYTE    background color (bits 7-4)
SeeAlso: #03884

Format of ASCROLL parameter block:
Offset  Size    Description     (Table 03884)
 00h    WORD    0006h (length of following data)
 02h    BYTE    left-most column (0-based) of source
 03h    BYTE    top-most row (0-based) of source
 04h    BYTE    rectangle's width in character cells
 05h    BYTE    rectangle's height in character cells
 06h    BYTE    left-most column (0-based) of destination
 07h    BYTE    top-most row (0-based) of destination
SeeAlso: #03883

Format of ASCUR parameter block:
Offset  Size    Description     (Table 03885)
 00h    WORD    0003h (length of following data)
 02h    BYTE    cursor start line (00h = top of cell, FFh = keep current shape)
 03h    BYTE    cursor stop line
 04h    BYTE    cursor attribute
                00h normal
                01h hidden
                02h left-arrow (requires start = 2 and stop = bottom of cell)
                03h right-arrow (requires start = 2 and stop = bottom of cell)
Notes:  no cursor is shown if the start line is greater than the stop line
        the alphanumeric cursor is hidden after each mode change
SeeAlso: #03882,INT 10/AH=01h

Format of ASFONT parameter block:
Offset  Size    Description     (Table 03886)
 00h    WORD    0005h (length of following data)
 02h    BYTE    font number (0-3)
 03h    DWORD   -> character set definition block (see #03887)

Format of 8514/A character set definition block:
Offset  Size    Description     (Table 03887)
 00h    BYTE    reserved
 01h    BYTE    type of character set
                00h bitmapped, 01h&02h reserved, 03h short-stroke font
 02h    BYTE    reserved
 03h    DWORD   reserved
 07h    BYTE    cell width in pixels
 08h    BYTE    cell height in pixels
 09h    BYTE    reserved
 0Ah    WORD    cell size in bytes
 0Ch    WORD    flags
                bit 15: reserved (0)
                bit 14: color bitmap
                bit 13: proportional spacing
 0Eh    DWORD   -> index table
 12h    DWORD   -> character width table
 16h    BYTE    initial code point
 17h    BYTE    final code point
 18h    DWORD   -> character definition table
 1Ch    WORD    reserved
 1Eh    DWORD   -> second character definition table
 22h    WORD    reserved
 24h    DWORD   -> third character definition table

Format of AXLATE parameter block:
Offset  Size    Description     (Table 03888)
 00h    WORD    0080h (length of following data)
 02h 64 BYTEs   character foreground translation table
 42h 64 BYTEs   character background translation table

Format of HBAR parameter block:
Offset  Size    Description     (Table 03889)
 00h    WORD    0000h (no data following)
SeeAlso: #03901

Format of HBBC parameter block:
Offset  Size    Description     (Table 03890)
 00h    WORD    0010h (length of following data)
 02h    WORD    data format
                0000h across-the-plane copy (color expansion)
                0008h through-the-plane copy
 04h    WORD    data rectangle's width
 06h    WORD    data rectangle's height
 08h    BYTE    source bit plane number (across-the-plane copies only)
 09h    BYTE    reserved
 0Ah  2 WORDs   X,Y coordinates of source's upper-left corner in display memory
 0Eh  2 WORDs   X,Y coordinates of destination's upper-left corner in
                  display memory
Note:   copies data from one location in video memory to another
SeeAlso: #03891

Format of HBBCHN parameter block:
Offset  Size    Description     (Table 03891)
 00h    WORD    0006h (length of following data)
 02h    DWORD   -> data buffer in system memory
 06h    WORD    number of bytes to transfer
Note:   this function performs the actual data transfer for a bitBLT set up
          with HBBR, HBBW, or HCBBW
SeeAlso: #03890,#03892,#03893,#03894

Format of HBBR parameter block:
Offset  Size    Description     (Table 03892)
 00h    WORD    000Ch or 0014h (length of following data)
 02h    WORD    data format
                0000h across-the-plane copy (color expansion)
                0008h through-the-plane copy
 04h    WORD    data rectangle's width
 06h    WORD    data rectangle's height
 08h    BYTE    source bit plane number
 09h    BYTE    reserved
 0Ah  2 WORDs   X,Y coordinates of destination's upper-left corner in
                  display memory
---optional---
 0Eh    WORD    sub-rectangle left margin in pixels
 10h    WORD    sub-rectangle top margin in pixels
 12h    WORD    sub-rectangle width
 14h    WORD    sub-rectangle height
SeeAlso: #03891,#03892,#03894

Format of HBBW parameter block:
Offset  Size    Description     (Table 03893)
 00h    WORD    000Ah or 0012h (length of following data)
 02h    WORD    data format
                0000h across-the-plane copy (color expansion)
                0008h through-the-plane copy
 04h    WORD    data rectangle's width
 06h    WORD    data rectangle's height
 08h  2 WORDs   X,Y coordinates of destination in display memory
---optional---
 0Ch    WORD    sub-rectangle left margin in pixels
 0Eh    WORD    sub-rectangle top margin in pixels
 10h    WORD    sub-rectangle width
 12h    WORD    sub-rectangle height
SeeAlso: #03891,#03893,#03894

Format of HCBBW parameter block:
Offset  Size    Description     (Table 03894)
 00h    WORD    0006h or 000Eh (length of following data)
 02h    WORD    data format
                0000h across-the-plane copy (color expansion)
                0008h through-the-plane copy
 04h    WORD    data rectangle's width
 06h    WORD    data rectangle's height
---optional---
 08h    WORD    sub-rectangle left margin in pixels
 0Ah    WORD    sub-rectangle top margin in pixels
 0Ch    WORD    sub-rectangle width
 0Eh    WORD    sub-rectangle height
SeeAlso: #03891,#03892,#03893

Format of HCCHST parameter block:
Offset  Size    Description     (Table 03895)
 00h    WORD    length of following data
 02h  N BYTEs   ASCII string to display (length given by 'length' field above)
SeeAlso: #03896

Format of HCHST parameter block:
Offset  Size    Description     (Table 03896)
 00h    WORD    length of following data
 02h  2 WORDs   X,Y of left-bottom corner of string on screen
 06h  N BYTEs   ASCII string to display (length given by 'length' field above)
SeeAlso: #03895

Format of HCLINE parameter block:
Offset  Size    Description     (Table 03897)
 00h    WORD    length of following data (multiple of 4)
 02h 2N WORDs   X,Y coordinates for each of N points in polyline
Notes:  the first line segment is drawn beginning at the current position
        on completion, the current position is set to the last point drawn
SeeAlso: #03907,#03918,#03900

Format of HCLOSE parameter block:
Offset  Size    Description     (Table 03898)
 00h    WORD    0001h (length of following data)
 01h    BYTE    (ret) return code
SeeAlso: #03909

Format of HCMRK parameter block:
Offset  Size    Description     (Table 03899)
 00h    WORD    length of following data
 02h 2N WORDs   X,Y of N points
Note:   draws N+1 marker symbols, the first one at the current position
SeeAlso: #03908

Format of HCRLINE parameter block:
Offset  Size    Description     (Table 03900)
 00h    WORD    length of following data (multiple of 4)
 02h 2N WORDs   X,Y coordinates relative to the position of the previous point
                  (current position for first point) for each of N points in
                  polyline
Notes:  the first line segment is drawn beginning at the current position
        on completion, the current position is set to the last point drawn
SeeAlso: #03907,#03897,#03918

Format of HEAR parameter block:
Offset  Size    Description     (Table 03901)
 00h    WORD    0001h (length of following data)
 02h    BYTE    area definition flags
                bits 7-6: End Area type
                        00 complete, perform fill
                        01 suspend definition
                        10 complete, but don't fill
SeeAlso: #03889

Format of HEGS parameter block:
Offset  Size    Description     (Table 03902)
 00h    WORD    0000h (no data following)

Format of HESC parameter block:
Offset  Size    Description     (Table 03903)
 00h    WORD    0000h (no data following)

Format of HINIT parameter block:
Offset  Size    Description     (Table 03904)
 00h    WORD    0002h (length of following data)
 02h    WORD    segment of task buffer
SeeAlso: #03943

Format of HINT parameter block:
Offset  Size    Description     (Table 03905)
 00h    WORD    0004h (length of following data)
 02h    DWORD   interrupt/event identifier
                bit 31: vertical blanking

Format of HLDPAL parameter block:
Offset  Size    Description     (Table 03906)
 00h    WORD    000Ah (length of following data)
 02h    BYTE    palette ID (00h = user, 01h = default)
 03h    BYTE    reserved
 04h    WORD    number of first palette entry
 06h    WORD    number of entries
 08h    DWORD   -> palette entries
SeeAlso: #03940

Format of HLINE parameter block:
Offset  Size    Description     (Table 03907)
 00h    WORD    length of following data (multiple of 4)
 02h 2N WORDs   X,Y coordinates for each of N points in polyline
Note:   on completion, the current position is set to the last point drawn
SeeAlso: #03897,#03918,#03900

Format of HMRK parameter block:
Offset  Size    Description     (Table 03908)
 00h    WORD    length of following data (multiple of 4)
 02h 2N WORDs   X,Y for N points
SeeAlso: #03899

Format of HOPEN parameter block:
Offset  Size    Description     (Table 03909)
 00h    WORD    0003h (length of following data)
 01h    BYTE    initialization flags
                bit 6: don't load default palette
                bit 7: clear bitplanes
 02h    BYTE    mode type (see #03910)
 03h    BYTE    (ret) return code
                bit 7: no adapter (hardware mismatch)
SeeAlso: #03898

(Table 03910)
Values for 8514/A display mode:
 0000h  12x20 characters, 1024x768
 0001h  8x14 characters, 640x480
 0002h  8x14 characters, 1024x768
 0003h  7x15 characters, 1024x768

Format of HQCOORD parameter block:
Offset  Size    Description     (Table 03911)
 00h    WORD    0004h (length of following data)
 02h    BYTE    (ret) coordinate format
                bits 7-4: bytes per coordinate
                bits 3-0: fraction bytes in coordinate
 03h    BYTE    (ret) relative coordinate format
                bits 7-4: bytes per coordinate
                bits 3-0: fraction bytes in coordinate
 04h    BYTE    (ret) number of dimensions (2-4)
 05h    BYTE    (ret) test results
                bit 7: coordinate format not supported
                bit 6: relative coordinate format not supported
                bit 5: specified dimension not supported

Format of HQCP parameter block:
Offset  Size    Description     (Table 03912)
 00h    WORD    0004h (length of following data)
 02h    WORD    (ret) current X position
 04h    WORD    (ret) current Y position

Format of HQDFPAL parameter block:
Offset  Size    Description     (Table 03913)
 00h    WORD    0040h (length of following data)
 02h 16 DWORDs  (ret) color index values
Note:   the default palette is set to match the default EGA/VGA 16-color
          palettes

Format of HQDPS parameter block:
Offset  Size    Description     (Table 03914)
 00h    WORD    0006h (length of following data)
 02h    WORD    (ret) size of data buffer in bytes
 04h    WORD    (ret) stack size in bytes
 06h    WORD    (ret) size of palette save buffer in bytes

Format of HQMODE parameter block:
Offset  Size    Description     (Table 03915)
 00h    WORD    0012h (length of following data)
 02h    BYTE    current video mode (see #03910)
 03h    WORD    driver version
                bit 6: 80286/8086 CPU
                bit 5: 8 bit planes instead of 4 planes
                bits 4-0: hardware release number
 05h    BYTE    adapter type
                03h 8514/A
                04h XGA
 06h    BYTE    reserved (display type)
 07h    BYTE    character cell width
 08h    BYTE    character cell height
 09h    BYTE    number of bit planes
 0Ah    WORD    screen width (pixels)
 0Ch    WORD    screen height (pixels)
 0Eh    WORD    horizontal resolution (pixels/inch)
 10h    WORD    vertical resolution (pixels/inch)
 12h    BYTE    flag: 00h = monochrome, FFh = color
 13h    BYTE    intensity levels
SeeAlso: #03916

Format of HQMODES parameter block:
Offset  Size    Description     (Table 03916)
 00h    WORD    0021h (length of following data)
 02h    BYTE    (ret) adapter type
 03h 32 BYTEs   (ret) available display modes (FFh byte marks end of data)
SeeAlso: #03915

Format of HRECT parameter block:
Offset  Size    Description     (Table 03917)
 00h    WORD    0008h (legth of following data)
 02h  2 WORDs   X,Y coordinates of top left corner or rectangle
 06h    WORD    rectangle's width
 08h    WORD    rectangle's height
Note:   the rectangle is filled using the current pattern, color, and mix

Format of HRLINE parameter block:
Offset  Size    Description     (Table 03918)
 00h    WORD    length of following data (multiple of 4)
 02h  2 WORDs   X,Y coordinates of starting point
 06h 2N WORDs   X,Y coordinates relative to the position of the previous point
                  for each of N points in polyline
Note:   on completion, the current position is set to the last point drawn
SeeAlso: #03907,#03897,#03900

Format of HRLPC parameter block:
Offset  Size    Description     (Table 03919)
 00h    WORD    0000h (no data following)
Note:   used for continuity of lines crossing scissors boundaries
SeeAlso: #03932

Format of HRPAL parameter block:
Offset  Size    Description     (Table 03920)
 00h    WORD    0300h (length of following data)
 02h 768 BYTEs  buffer containing previously-saved palette table
SeeAlso: #03940

Format of HSBCOL parameter block:
Offset  Size    Description     (Table 03921)
 00h    WORD    0004h (length of following data)
 02h    DWORD   color index for new background color
SeeAlso: #03925

Format of HSBP parameter block:
Offset  Size    Description     (Table 03922)
 00h    WORD    000Ch (length of following data)
 02h    DWORD   bitmask for graphics updates
 06h    DWORD   bitmask for alphanumeric updates
 0Ah    DWORD   display bitmask

Format of HSCELL parameter block:
Offset  Size    Description     (Table 03923)
 00h

Format of HSCMP parameter block:
Offset  Size    Description     (Table 03924)
 00h    WORD    0005h (length of following data)
 02h    DWORD   comparison color
 06h    BYTE    logical operation
                00h True
                01h pel > testcolor
                02h pel == testcolor
                03h pel < testcolor
                04h False
                05h pel >= testcolor
                06h pel <> testcolor
                07h pel <= testcolor

Format of HSCOL parameter block:
Offset  Size    Description     (Table 03925)
 00h    WORD    0004h (length of following data)
 02h    DWORD   color index for new foreground color
SeeAlso: #03921

Format of HSCOORD parameter block:
Offset  Size    Description     (Table 03926)
 00h    WORD    0003h (length of following data)
 02h    BYTE    coordinate format
                bits 7-4: bytes per coordinate
                bits 3-0: fraction bytes in coordinate
 03h    BYTE    relative coordinates format
                bits 7-4: bytes per coordinate
                bits 3-0: fraction bytes in coordinate
 04h    BYTE    number of dimensions (2-4)

Format of HSCP parameter block:
Offset  Size    Description     (Table 03927)
 00h    WORD    0004h (length of following data)
 02h  2 WORDs   X,Y or coordinate for new current position

Format of HSCS parameter block:
Offset  Size    Description     (Table 03928)
 00h    WORD    0004h (length of following data)
 02h    DWORD   -> character set definition

Format of HSGQ parameter block:
Offset  Size    Description     (Table 03929)
 00h    WORD    0002h (length of following data)
 02h    WORD    quality settings (see #03931)

Format of HSHS parameter block:
Offset  Size    Description     (Table 03930)
 00h    WORD    0008h (length of following data)
 02h    WORD    left edge of clipping rectangle (-2048 to +6143)
 04h    WORD    right edge
 06h    WORD    top edge
 08h    WORD    bottom edget

Bitfields for 8514/A quality settings:
Bit(s)  Description     (Table 03931)
 15     reserved
 14     high precision
 13     reserved
 12-11  pel code
        00 not drawn
        01 drawn
        02 conditional on overpainting/mixes
 10     don't close areas to be filed
 9-0    reserved

Format of HSLPC parameter block:
Offset  Size    Description     (Table 03932)
 00h    WORD    0000h (no data following)
Note:   used for continuity of lines crossing scissors boundaries
SeeAlso: #03919

Format of HSLT parameter block:
Offset  Size    Description     (Table 03933)
 00h    WORD    0006h (length of following data)
 02h    BYTE    line type (see #03934)
 03h    BYTE    reserved
 04h    DWORD   -> user line-type definition (if user type)
SeeAlso: #03935

(Table 03934)
Values for 8514/A line type:
 00h    user line type
 01h    dotted
 02h    short dashes
 03h    dash-dot
 04h    double dotted
 05h    dashed
 06h    dash double dot
 07h    solid
 08h    invisible
SeeAlso: #03933

Format of HSLW parameter block:
Offset  Size    Description     (Table 03935)
 00h    WORD    0001h (length of following data)
 02h    BYTE    width of line in pixels
SeeAlso: #03933

Format of HSMODE parameter block:
Offset  Size    Description     (Table 03936)
 00h    WORD    0001h (length of following data)
 02h    BYTE    new display mode number (see #03910)

Format of HSMRK paramter block:
Offset  Size    Description     (Table 03937)
 00h    WORD    000Eh (length of following data)
 02h    BYTE    cell width
 03h    BYTE    cell height
 04h    BYTE    flags
 05h    BYTE    reserved
 06h    WORD    length of marker symbol
 08h    DWORD   -> image definition data
 0Ch    DWORD   -> color definition data
SeeAlso: #03941

Format of HSMX parameter block:
Offset  Size    Description     (Table 03938)
 00h    WORD    0002h (length of following data)
 02h    BYTE    foreground mix (see #03939)
 03h    BYTE    background mix (see #03939)

(Table 03939)
Values for 8514/A mix:
 00h    retain previous mix
 01h    source OR destination
 02h    source
 04h    source XOR destination
 05h    leave as-is
 06h    max(source,destination)
 07h    min(source,destination)
 08h    source+destination (clipped)
 09h    destination-source (clipped to zero)
 0Ah    source-destination (clipped to zero)
 0Bh    average source and destination
 10h    zero destination
 11h    source AND destination
 12h    source AND NOT destination
 13h    source
 14h    NOT source AND destination
 15h    leave as-is
 16h    source XOR destination
 17h    source OR destination
 18h    NOT source AND NOT destination
 19h    NOT (source XOR destination)
 1Ah    NOT destination
 1Bh    source OR NOT destination
 1Ch    NOT source
 1Dh    NOT source OR destination
 1Eh    NOT source OR NOT destination
 1Fh    set all bits of destination

Format of HSPAL parameter block:
Offset  Size    Description     (Table 03940)
 00h    WORD    0300h (length of following data)
 02h 768 BYTEs  buffer for palette table
SeeAlso: #03906,#03920

Format of HSPATT parameter block:
Offset  Size    Description     (Table 03941)
 00h    WORD    000Eh (length of following data)
 02h    BYTE    cell width
 03h    BYTE    cell height
 04h    BYTE    flags
 05h    BYTE    reserved
 06h    WORD    length of marker symbol
 08h    DWORD   -> image definition data
 0Ch    DWORD   -> color definition data
SeeAlso: #03937,#03942

Format of HSPATTO parameter block:
Offset  Size    Description     (Table 03942)
 00h    WORD    0004h (length of following data)
 02h  2 WORDs   X,Y of pattern reference point (origin)
SeeAlso: #03941

Format of HSYNC parameter block:
Offset  Size    Description     (Table 03943)
 00h    WORD    0002h (length of following data)
 02h    WORD    segment of task state buffer
SeeAlso: #03904

Format of HXLATE parameter block:
Offset  Size    Description     (Table 03944)
 00h    WORD    0020h (length of following data)
 02h 32 BYTEs   color index table
--------V-7F0105-----------------------------
INT 7F - IBM XGA Adapter Interface (XGAAIDOS.SYS)
        AX = 0105h
Return: CF set on error
        CF clear if successful
            CX:DX -> array of FAR pointers to entry points (see #03877)
Note:   this API is a superset of the 8514/A Adapter Interface
          (see AX=0105h"HDILOAD")
--------V-7F0106-----------------------------
INT 7F - HDILOAD Mach32 Adapter Interface - UNINSTALL
        AX = 0106h
Return: AX = 0105h if successfully unloaded
SeeAlso: AX=0105h
--------N-7F02-------------------------------
INT 7F - Alloy NTNX, MW386 - RELEASE SEMAPHORE
        AH = 02h
        DS:DX -> ASCIZ semaphore name (max 64 bytes)
Return: AL = status (see #03871)
        AH = semaphore owner if status=02h
SeeAlso: AH=00h,AH=01h,AH=42h
--------T-7F02-------------------------------
INT 7F - MultiLink Advanced v1.0+ - RELEASE CPU
        AH = 02h
Return: ???
Desc:   yields CPU to other tasks
SeeAlso: AH=00h"MultiLink",AH=09h"MultiLink",INT 15/AX=1000h
--------N-7F02-------------------------------
INT 7F - G8BPQ v4.00+ - HOST MODE - SEND FRAME
        AH = 02h
        AL = stream number (01h-40h)
        CX = length of frame
        ES:SI -> frame to be sent
SeeAlso: AH=00h"G8BPQ",AH=03h"G8BPQ",AH=07h"G8BPQ",AH=0Ah"G8BPQ"
--------f-7F0200-----------------------------
INT 7F - Btrieve Multi-User - GIVE UP TIME???
        AX = 0200h
SeeAlso: INT 2F/AX=AB01h,INT 2F/AX=AB02h,INT 7B"Btrieve"
--------N-7F03-------------------------------
INT 7F - Alloy ANSK, NTNX, MW386 - GET USER NUMBER
        AH = 03h
Return: AL = user number
        AH = machine number (MW386)
Note:   this function call is the recommended method for a CPU-bound process to
          prevent its priority from being lowered
SeeAlso: AH=04h,AH=05h,AH=A1h
--------N-7F03-------------------------------
INT 7F - G8BPQ v4.00+ - HOST MODE - RECEIVE FRAME
        AH = 03h
        AL = stream number (01h-40h)
        ES:DI -> buffer for frame (must be large enough for a full frame; 350
                  bytes is usually sufficient)
Return: BX = number of pending frames (0000h if returned frame was last avail)
        CX = length of received frame
SeeAlso: AH=02h"G8BPQ",AH=07h"G8BPQ",AH=0Bh"G8BPQ"
--------N-7F04-------------------------------
INT 7F - Alloy NTNX, MW386 - GET NUMBER OF USERS
        AH = 04h
Return: AL = total number of users on currrent machine (MW386)
        AL = number of slaves on system (NTNX)
SeeAlso: AH=03h
--------N-7F04-------------------------------
INT 7F - G8BPQ v4.00+ - HOST MODE - GET STREAM STATUS
        AH = 04h
        AL = stream number (01h-40h)
Return: CX = state (0000h disconnected, 0001h connected)
        DX = delta state (0000h no change, 0001h changed since last check)
SeeAlso: AH=00h"G8BPQ",AH=02h"G8BPQ",AH=05h"G8BPQ"
--------N-7F05-------------------------------
INT 7F - Alloy NTNX (Host) - LOCK/UNLOCK SYSTEM, SPOOLER CONTROL
        AH = 05h
        AL = function
            00h lock system (disable slave services)
            01h unlock system
            02h enable spooler
            03h disable spooler
            04h enable slave timer update
            05h disable slave timer update
            06h enable form feeds
            07h disable form feeds
SeeAlso: INT 17/AH=A4h
--------N-7F05-------------------------------
INT 7F - Alloy NTNX (Slave), MW386 - GET USER PARAMETERS
        AH = 05h
        DX:DI -> buffer for user information record (see #03945)
Notes:  MW386 provides this function for backward compatibility only, and sets
          many of the fields to zero because they are meaningless under MW386
        this function has no effect when called by the host (user 0)
SeeAlso: AH=03h

Format of Alloy user information record:
Offset  Size    Description     (Table 03945)
 00h    WORD    segment of video RAM
 02h    WORD    segment of secondary copy of video RAM
 04h    WORD    offset of screen update flag (see INT 10/AH=8Bh)
                flag nonzero if update needed
 06h    WORD    video NMI enable port
                (not used by MW386, set to 0000h)
 08h    WORD    video NMI disable port
                (not used by MW386, set to 0000h)
 0Ah    BYTE    processor type
                00h 8088
                01h V20
                02h 8086
                03h V30
                06h 80386
 0Bh    WORD    multitasking flag (00h = single tasking, 01h = multitasking)
                (not used by MW386, set to 0000h)
 0Dh    WORD    offset of terminal driver
                (not used by MW386, set to 0000h)
 0Fh    BYTE    port for console I/O
                (not used by MW386, set to 0000h)
 10h    WORD    offset of processor communication busy flag
                bit 7 set when slave communicating with host
 12h    WORD    pointer to FAR NX system call
                (not used by MW386, set to 0000h)
 14h    WORD    offset of 16-byte user configuration record (see AH=38h)
 16h    WORD    offset of command/status word
 18h    WORD    offset of screen valid flag (see INT 10/AH=93h)
                nonzero if screen must be repainted
 1Ah    WORD    offset of screen repaint flag
 1Ch    WORD    pointer to NEAR NX system call
                (not used by MW386, set to 0000h)
 1Eh    WORD    offset for intercept flags
                (not used by MW386, set to 0000h)
                intercept flag = FFh if MS-DOS intercepts should be disabled
 20h    WORD    offset of terminal lock flag (see INT 10/AH=92h)
                lock flag = FFh if backgrnd screen updates should be suspended
 22h 26 BYTEs   reserved
--------N-7F05-------------------------------
INT 7F - G8BPQ v4.00+ - HOST MODE - ACKNOWLEDGE STREAM STATUS CHANGE
        AH = 05h
        AL = stream number (01h-40h)
Note:   this function must be called in order to receive a report of another
          status change
SeeAlso: AH=00h"G8BPQ",AH=04h"G8BPQ"
--------N-7F06-------------------------------
INT 7F - Alloy NTNX (Host) - GET SHARED DRIVE INFO
        AH = 06h
        AL = drive number (1=A:, 2=B:, etc)
        ES:DI -> drive info record (see #03946)
Return: AX = status
            0000h successful
                ES:DI buffer filled
            0001h not shared drive

Format of Alloy drive info record:
Offset  Size    Description     (Table 03946)
 00h    WORD    segment of drive IO-REQUEST structure (MS-DOS DPB)
 02h    WORD    segment of allocation map (owner table)
                one byte per FAT entry, containing user ID owning that entry
 04h    WORD    segment of master FAT for drive (copy of FAT on disk)
 06h    WORD    pointer to configuration file
 08h    WORD    total number of clusters
 0Ah    WORD    bytes per sector
 0Ch    WORD    sectors per cluster
 0Eh    BYTE    FAT type (0Ch = 12-bit, 10h = 16-bit)
--------N-7F06-------------------------------
INT 7F - Alloy NTNX (Slave) - ALLOCATE FREE CLUSTER ON SHARED DRIVE
        AH = 06h
        DL = drive number (1=A:,2=B:,etc)
        CX = number of clusters to allocate
Return: AH = status
            00h successful
                CX = number of clusters still free
            10h invalid shared drive request
                CL = first and second shared drives
            11h invalid cluster count (must be 01h-FFh)
--------N-7F06-------------------------------
INT 7F - G8BPQ v4.00+ - HOST MODE - SESSION CONTROL
        AH = 06h
        AL = stream number (01h-40h)
        CX = subfunction
            0000h connect to node
                DL bit 0: use BBS callsign instead of Node Call
            0001h connect to node
                use BBS Call if APPLMASK=1
            0002h disconnect
            0003h return user to node
SeeAlso: AH=01h"G8BPQ",AH=04h"G8BPQ"
--------N-7F07-------------------------------
INT 7F - Alloy NTNX, MW386 - GET LIST OF SHARED DRIVES
        AH = 07h
Return: ES:DI -> shared drive list (see #03947)
Note:   MW386 considers all fixed disks to be shared drives; only C and D will
          be returned as shared

Format of Alloy shared drive list:
Offset  Size    Description     (Table 03947)
 00h    BYTE    string length
 01h    BYTE    number of shared drives
 02h  N BYTEs   one byte per shared drive
--------N-7F07-------------------------------
INT 7F - G8BPQ v4.00+ - HOST MODE - GET BUFFER COUNTS FOR STREAM
        AH = 07h
        AL = stream number (01h-40h)
Return: BX = number of pending receive frames
        CX = number of unacknowledged sent frames
        DX = number of buffers available
SeeAlso: AH=02h"G8BPQ",AH=03h"G8BPQ"
--------N-7F08-------------------------------
INT 7F - Alloy NTNX (Host) - GET INTERRUPT VECTORS
        AH = 08h
        CL = function
            00h get original interrupt vector
            01h get Network Executive interrrupt
        AL = interrupt number
        DX:SI -> DWORD to hold interrupt vector
Return: AL = status
            00h successful
            01h interrupt vector not used by network executive
            02h invalid subfunction
Note:   the network executive uses interrupts 02h,08h,09h,0Fh,10h,13h,16h-19h,
          1Ch,20h,28h,2Ah,2Fh,5Bh,67h,7Fh,ECh, and F0h-FFh
SeeAlso: AH=09h/CL=03h,INT 21/AH=35h
--------N-7F08--CL02-------------------------
INT 7F - Alloy NTNX - SET MESSAGE DISPLAY TIMEOUT
        AH = 08h
        CL = 02h
        DX = timeout in seconds
Return: AL = status
            00h successful
            02h invalid subfunction
--------N-7F08-------------------------------
INT 7F - G8BPQ v4.00+ - HOST MODE - PORT CONTROL/INFORMATION
        AH = 08h
        AL = stream number (01h-40h)
Return: ES:DI -> 10-byte buffer containing blank-padded callsign
        ---v4.05+ ---
        AL = radio port to which channel is connected (level 2)
        AH = session type (see #03948)
        BX = L2 paclen for session
        CX = maximum frame size
        DX = L4 window size or 0000h if not L4 circuit
Program: the G8BPQ AX25 Networking Package is amateur packet radio software by
          John Wiseman which allows a PC to act as a node in an AX.25 network
SeeAlso: AH=01h"G8BPQ",AH=02h"G8BPQ",AH=03h"G8BPQ",AH=0Ah"G8BPQ"

Bitfields for G8BPQ session type:
Bit(s)  Description     (Table 03948)
 0      L2LINK
 1      SESSION
 2      UPLINK
 3      DOWNLIND
 5      BPQHOST
--------T-7F09-------------------------------
INT 7F - MultiLink Advanced v1.0+ - SET TASK PRIORITY
        AH = 09h
        AL = priority (0-7)
Return: nothing
InstallCheck:   ensure that the interrupt vector is not pointing at segment
          0000h, then test whether the byte at offset 0000h in the interrupt
          handler's segment is E9h
Index:  installation check;MultiLink Advanced
SeeAlso: AH=00h"MultiLink",AH=0Ah"MultiLink"
--------N-7F09-------------------------------
INT 7F - G8BPQ - proposed addition - GET NODE/APPLICATION CALLSIGN AND ALIAS
        AH = 09h
        AL = application
            00h node
            01h BBS
            02h HOST
            03h SYSOP
        BL = what to get (00h callsign, 01h application name)
        ES:SI -> buffer for callsign/name string
Return: CX = length of returned string
SeeAlso: AH=00h"G8BPQ",AH=01h"G8BPQ",AH=0Ch"G8BPQ"
--------N-7F09-------------------------------
INT 7F - Alloy NTNX - ENABLE/DISABLE MUD FILE CHECKING
        AH = 09h
        CL = function
            00h enable checking of RTNX.MUD file
            01h disable RTNX.MUD checking
--------N-7F09--CL02-------------------------
INT 7F - Alloy NTNX - SWITCH HOST TO DEDICATED MODE
        AH = 09h
        CL = 02h
Note:   in dedicated mode, the host will only poll for I/O requests from the
          slave processors, and not provide workstation services
--------N-7F09--CL03-------------------------
INT 7F - Alloy NTNX,MW386 - GET ALTERNATE INTERRUPT
        AH = 09h
        CL = 03h
        AL = default interrupt number (67h,7Fh,etc)
Return: CL = actual interrupt which handles specified interrupt's calls
SeeAlso: AH=08h
--------N-7F0A--CL00-------------------------
INT 7F - Alloy NTNX - GET SYSTEM FLAGS
        AH = 0Ah
        CL = 00h
        ES:DI -> buffer for system flags (see #03949)
Return: ES:DI buffer filled
Notes:  on a slave, only the NX_Busy flag is returned
        all three flags are at fixed positions, so this function only needs to
          be called once
        an interrupt handler should only perform DOS or device accesses when
          all three flags are 00h

Format of Alloy system flags:
Offset  Size    Description     (Table 03949)
 00h    DWORD   pointer to NX_Busy flag (nonzero when communicating with users)
 04h    DWORD   pointer to device driver busy flag
 08h    DWORD   pointer to InTimer flag
--------N-7F0A-------------------------------
INT 7F - G8BPQ v4.00+ - HOST MODE - TRANSMIT RAW (KISS) FRAME
        AH = 0Ah
        AL = radio port
        ES:SI -> buffer containing data to be sent
        CX = number of bytes to send
SeeAlso: AH=02h"G8BPQ",AH=08h"G8BPQ",AH=0Bh"G8BPQ"
--------T-7F0A-------------------------------
INT 7F - MultiLink Advanced v1.0+ - SET KEYBOARD TEST STATUS
        AH = 0Ah
        AL = task-switch status
            00h normal (disable task when it repeatedly polls keyboard)
            01h disable task until keyboard input available
            FFh never disable task
Return: ???
SeeAlso: AH=09h"MultiLink"
--------N-7F0B--CL02-------------------------
INT 7F - Alloy NTNX (Host) - SET/RESET GRAPHICS DOS ON SLAVE
        AH = 0Bh
        CL = 02h
        AL = slave ID number
        CH = DOS to activate
            00h graphics DOS
            01h character DOS
Return: AL = status
            00h successful
            01h nothing done, proper DOS type already loaded
--------N-7F0B-------------------------------
INT 7F - G8BPQ v4.00+ - HOST MODE - RECEIVE TRACE (RAW DATA) FRAME
        AH = 0Bh
        ES:DI -> buffer for received data (see #03950)
Return: CX = number of bytes received
Note:   the specified buffer must be large enough to receive a full frame
SeeAlso: AH=03h"G8BPQ",AH=08h"G8BPQ",AH=0Ah"G8BPQ"

Format of G8BPQ received data:
Offset  Size    Description     (Table 03950)
 00h    WORD    internal control information
 02h    BYTE    port number (bit 7 set if transmitted frame)
 03h    WORD    frame length including this header
 05h    var     user data
--------N-7F0C-------------------------------
INT 7F - G8BPQ v4.00+ - HOST MODE - UPDATE SWITCH INFORMATION
        AH = 0Ch
        DX = function
            0001h update beacon text
                CX = length of data
                ES:SI -> data to be sent in beacons
            0002h (v4.07+) initiate NODES broadcast
SeeAlso: AH=09h"G8BPQ"
--------N-7F0D00-----------------------------
INT 7F - G8BPQ v4.07+ - HOST MODE - GET AVAILABLE STREAM
        AX = 0D00h
Return: AL = first available stream number, or FFh if none free
SeeAlso: AH=00h"G8BPQ",AH=0Dh
--------N-7F0D-------------------------------
INT 7F - G8BPQ v4.07+ - HOST MODE - ALLOCATE/DEALLOCATE STREAM
        AH = 0Dh
        AL = stream number (01h-FFh)
        CL = function
            01h allocate stream
                Return: CX = status (0000h successful, else already in use)
            02h deallocate stream
SeeAlso: AX=0D00h
--------N-7F0F-------------------------------
INT 7F - G8BPQ v4.00+ - HOST MODE - GET TIME MARKER
        AH = 0Fh
Return: AX = time marker (clock ticks modulo 64K)
Program: the G8BPQ AX25 Networking Package is amateur packet radio software by
          John Wiseman which allows a PC to act as a node in an AX.25 network
SeeAlso: AH=01h"G8BPQ",AX=0D00h,INT 1A/AH=00h
--------N-7F10--CL00-------------------------
INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - OPEN CHANNEL
        AH = 10h
        CL = 00h
        AL = channel number
        DX:DI -> channel buffer
Return: AL = status (00h-03h,0Dh) (see #03951)
Note:   may not be invoked from within a hardware interrupt handler
SeeAlso: AH=10h/CL=01h,AH=10h/CL=04h,AH=14h/CL=02h

(Table 03951)
Values for Alloy function status:
 00h    successful
 01h    busy
 02h    channel range error (not 00h-3Fh)
 03h    invalid subfunction
 0Ah    channel not open
 0Ch    channel already locked
 0Dh    unable to open
--------N-7F10--CL01-------------------------
INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - CLOSE CHANNEL
        AH = 10h
        CL = 01h
        AL = channel number
Return: AL = status (00h-03h,0Ah) (see #03951)
Note:   may not be invoked from within a hardware interrupt handler
SeeAlso: AH=10h/CL=00h,AH=10h/CL=05h
--------N-7F10--CL02-------------------------
INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - LOCK CHANNEL
        AH = 10h
        CL = 02h
        AL = channel number
Return: AL = status (00h-03h,0Ah,0Ch) (see #03951)
Note:   may not be invoked from within a hardware interrupt handler
SeeAlso: AH=10h/CL=03h,AH=10h/CL=06h,AH=10h/CL=08h
--------N-7F10--CL03-------------------------
INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - UNLOCK CHANNEL
        AH = 10h
        CL = 03h
        AL = channel number
Return: AL = status (00h-03h,0Ah) (see #03951)
Notes:  should only be used on channels locked with AH=10h/CL=02h, not on those
          locked by receipt of a datagram
        may not be invoked from within a hardware interrupt handler
SeeAlso: AH=10h/CL=02h,AH=10h/CL=04h,AH=10h/CL=09h
--------N-7F10--CL04-------------------------
INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - RELEASE BUFFER
        AH = 10h
        CL = 04h
        AL = channel number
Return: AL = status (00h-03h) (see #03951)
Notes:  unlocks buffer after received datagram has been processed
        may not be invoked from within a hardware interrupt handler
SeeAlso: AH=10h/CL=00h
--------N-7F10--CL05-------------------------
INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - CLOSE ALL CHANNELS
        AH = 10h
        CL = 05h
Return: AL = status (00h-03h) (see #03951)
Notes:  clears all pending datagrams and clears buffer pointers before closing
          the channels
        may not be invoked from within a hardware interrupt handler
SeeAlso: AH=10h/CL=01h
--------N-7F10--CL06-------------------------
INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - LOCK ALL OPEN CHANNELS
        AH = 10h
        CL = 06h
Return: AL = status (00h-03h) (see #03951)
Note:   may not be invoked from within a hardware interrupt handler
SeeAlso: AH=10h/CL=02h,AH=10h/CL=08h
--------N-7F10--CL07-------------------------
INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - UNLOCK ALL LOCKED IDLE CHANNELS
        AH = 10h
        CL = 07h
Return: AL = status (00h-03h) (see #03951)
Notes:  unlocks all locked channels which have no pending datagrams
        may not be invoked from within a hardware interrupt handler
SeeAlso: AH=10h/CL=03h,AH=10h/CL=09h
--------N-7F10--CL08-------------------------
INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - LOCK MULTIPLE CHANNELS
        AH = 10h
        CL = 08h
        DX = maximum channel number to lock
Return: AL = status (00h-03h) (see #03951)
Notes:  locks channels numbered 00h through the value in DX
        may not be invoked from within a hardware interrupt handler
SeeAlso: AH=10h/CL=02h,AH=10h/CL=06h,AH=10h/CL=09h
--------N-7F10--CL09-------------------------
INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - UNLOCK MULTIPLE CHANNELS
        AH = 10h
        CL = 09h
        DX = maximum channel number to unlock
Return: AL = status (00h-03h) (see #03951)
Notes:  unlocks channels numbered 00h through the value in DX
        may not be invoked from within a hardware interrupt handler
SeeAlso: AH=10h/CL=03h,AH=10h/CL=07h,AH=10h/CL=08h
--------N-7F11-------------------------------
INT 7F - Alloy NTNX, MW386 - SEND DATAGRAM
        AH = 11h
        DX:SI -> request block (see #03953)
Return: AL = status (see #03952)
Note:   if wildcard channel FFh used, actual channel number will be filled in
SeeAlso: AH=12h

(Table 03952)
Values for Alloy function status:
 00h    successful
 01h    busy
 02h    channel range error (not 00h-3Fh)
 03h    invalid subfunction
 0Ah    packet too large (or <2 bytes if NTNX)
 0Bh    can't send packet to itself
 0Ch    invalid number of destinations
 0Dh    destination channel number out of range
 0Eh    destination user is busy
 0Fh    destination user has locked channel
 10h    channel not open
 11h    no datagram server on destination (NTNX)

Format of Alloy request block:
Offset  Size    Description     (Table 03953)
 00h    DWORD   pointer to packet to send
 04h    WORD    packet size in bytes (1-4096)
 06h    BYTE    number of destinations for packet (max 1Fh)
 07h 31 BYTEs   destination user IDs (FFh = broadcast to all except sender)
 26h 31 BYTEs   destination channels (FFh = first available channel)
 45h 31 BYTEs   return destination statuses
--------N-7F12-------------------------------
INT 7F - Alloy NTNX, MW386 - ACKNOWLEDGE DATAGRAM
        AH = 12h
        AL = channel number being acknowledged
        DI:DX = 32-bit status to return to sender
Return: AL = status (see #03954)
Note:   also unlocks the channel, allowing the next datagram to be received
SeeAlso: AH=11h,AH=15h/CL=04h

(Table 03954)
Values for Alloy function status:
 00h    successful
 01h    busy
 02h    channel range error (not 00h-3Fh)
 03h    invalid subfunction
 0Ah    channel not open
 0Bh    no message in channel
 0Ch    destination slave busy--retry (NTNX)
 0Dh    destination user not active
 0Eh    destination slave not active (NTNX)
 0Fh    destination disabled datagram service
--------V-7F1234-----------------------------
INT 7F - TIGA Communications Driver v2.05 - UNINSTALL
        AX = 1234h
SeeAlso: AX=4321h
--------N-7F13--CL00-------------------------
INT 7F - Alloy NTNX, MW386 - RESET USER DATAGRAMS
        AH = 13h
        CL = 00h
Note:   clears all pending datagrams and removes all channels opened in NTNX
          compatibility mode
--------N-7F14--CL00-------------------------
INT 7F - Alloy NTNX, MW386 -  SET RECEIVE ISR
        AH = 14h
        CL = 00h
        DX:DI -> application FAR receive service routine (see #03955)
Return: AL = status (00h-03h) (see #03954)
SeeAlso: AH=14h/CL=01h,AH=14h/CL=03h

(Table 03955)
Values Alloy receive service routine is called with:
        DH = sender ID
        DL = channel with datagram
        interrupts disabled
Return: AL = response code
            00h leave buffer locked, set channel status, and repeat call later
            01h release channel buffer
            02h change buffer pointer to DX:DI
        AH,CX,DX,DI,SI may be destroyed
--------N-7F14--CL01-------------------------
INT 7F - Alloy NTNX, MW386 - SET ACKNOWLEDGE ISR
        AH = 14h
        CL = 01h
        DX:DI -> application FAR acknowledge service routine (see #03956)
Return: AL = status (00h-03h) (see #03954)
Note:   the service routine will be called as soon as an acknowledgment arrives
SeeAlso: AH=12h,AH=14h/CL=00h,AH=14h/CL=04h,AH=15h/CL=04h

(Table 03956)
Values Alloy acknowledge service routine is called with:
        DS:SI -> acknowledge structure (see #03960)
Return: AL = response code
            00h application busy, network executive should call again later
            01h acknowledge accepted
        AH,DX,SI may be destroyed
--------N-7F14--CL02-------------------------
INT 7F - Alloy NTNX, MW386 - SET CHANNEL BUFFER POINTER
        AH = 14h
        CL = 02h
        AL = channel number
        DX:DI -> receive buffer
Return: AL = status (00h-03h) (see #03954)
Note:   may be called from within a receive ISR or when a datagram is pending
SeeAlso: AH=10h/CL=00h,AH=14h/CL=00h
--------N-7F14--CL03-------------------------
INT 7F - Alloy NTNX, MW386 - GET RECEIVE ISR
        AH = 14h
        CL = 03h
Return: DX:DI -> current receive ISR
SeeAlso: AH=14h/CL=00h,AH=14h/CL=04h
--------N-7F14--CL04-------------------------
INT 7F - Alloy NTNX, MW386 - GET ACKNOWLEDGE ISR
        AH = 14h
        CL = 04h
Return: DX:DI -> current acknowledge ISR
SeeAlso: AH=14h/CL=01h,AH=14h/CL=03h
--------N-7F14--CL05-------------------------
INT 7F - Alloy NTNX (Host), MW386 - GET BUSY POINTER
        AH = 14h
        CL = 05h
        DX:DI -> buffer for busy structure (see #03957)
Return: DX:DI buffer filled

Format of Alloy busy structure:
Offset  Size    Description     (Table 03957)
 00h    DWORD   pointer to busy flag byte
 04h    WORD    fixed port address (FF00h)
--------N-7F15--CL00-------------------------
INT 7F - Alloy NTNX, MW386 - GET CHANNEL STATUS
        AH = 15h
        CL = 00h
        AL = channel number
        DX:DI -> status structure (see #03958)
Return: AL = status (00h-03h) (see #03954)
SeeAlso: AH=15h/CL=01h

Format of Alloy channel status structure:
Offset  Size    Description     (Table 03958)
 00h    BYTE    channel status
                bit 0: channel open
                bit 1: channel buffer contains received data
                bit 7: channel locked
 01h    BYTE    sender ID
--------N-7F15--CL01-------------------------
INT 7F - Alloy NTNX, MW386 - GET NEXT FULL CHANNEL
        AH = 15h
        CL = 01h
        DX:DI -> full-channel structure (see #03959)
Return: AL = status
            00h successful
            01h busy
            0Ah no datagrams available
Note:   MW386 v1.0 returns the lowest channel with a datagram; newer versions
          and NTNX return the oldest datagram
SeeAlso: AH=15h/CL=00h

Format of Alloy full-channel structure:
Offset  Size    Description     (Table 03959)
 00h    BYTE    number of channel with oldest datagram
 01h    BYTE    sender ID
--------N-7F15--CL02-------------------------
INT 7F - Alloy NTNX, MW386 - GET MAXIMUM NUMBER OF CHANNELS
        AH = 15h
        CL = 02h
Return: AH = number of channels available (40h for MW386)
Note:   the application may always assume at least 32 channels available
SeeAlso: AH=15h/CL=03h
--------N-7F15--CL03-------------------------
INT 7F - Alloy NTNX, MW386 - GET MAXIMUM PACKET SIZE
        AH = 15h
        CL = 03h
        DX:DI -> WORD for return value
Return: buffer WORD filled with maximum packet size (4096 for MW386)
SeeAlso: AH=15h/CL=02h
--------N-7F15--CL04-------------------------
INT 7F - Alloy NTNX, MW386 - GET AND CLEAR ACKNOWLEDGE STATUS
        AH = 15h
        CL = 04h
        DX:DI -> status structure (see #03960)
Return: AL = status
            00h successful
                DX:DI structure filled
            01h busy
            0Ah no acknowledgement has arrived
SeeAlso: AH=12h,AH=14h/CL=01h

Format of Alloy status structure:
Offset  Size    Description     (Table 03960)
 00h    BYTE    sender ID
 01h    BYTE    channel number
 02h  4 BYTEs   receiver status (see #03954)
--------N-7F16-------------------------------
INT 7F - Alloy NTNX, MW386 - DIRECT MEMORY TRANSFER
        AH = 16h
        DX:SI -> transfer structure (see #03961)
Return: AL = status
            00h successful
            0Ah source or destination out of range
            0Bh transfer kernel busy--try again
Notes:  this call transfers memory contents directly between users; both source
          and destination user IDs may differ from the caller's ID
        no segment wrap is allowed

Format of Alloy transfer structure:
Offset  Size    Description     (Table 03961)
 00h    WORD    bytes to transfer
 02h    BYTE    source ID
                FEh = caller
 03h    DWORD   source address
 07h    BYTE    destination ID
                FFh = all slaves except caller
                FEh = caller
 08h    DWORD   destination address
--------N-7F21-------------------------------
INT 7F - Alloy NTNX, MW386 - SEND MESSAGE OR COMMAND TO USER(S)
        AH = 21h
        AL = sender's user ID
        DS:DX -> control packet (see #03962)
Note:   messages or commands are ignored if disabled by the destination user
SeeAlso: AH=22h

Format of Alloy control packet:
Offset  Size    Description     (Table 03962)
 00h    BYTE    packet type
                00h message
                01h NTNX command
                02h MW386 command
 01h    BYTE    destination user ID or 'A' for all users
 02h 62 BYTEs   ASCIZ message (packet type 00h)
                BIOS keycodes terminated by NUL byte (type 01h) or word (02h)
Note:   a maximum of 16 keycodes will be processed for NTNX and MW386 commands
--------N-7F22-------------------------------
INT 7F - Alloy NTNX - GET MESSAGE
        AH = 22h
Return: pending messages displayed on user's screen
SeeAlso: AH=21h
--------N-7F24-------------------------------
INT 7F - Alloy NTNX, MW386 - ATTACH OR RELEASE DRIVE FOR LOW-LEVEL WRITE ACCESS
        AH = 24h
        CL = function
            00h attach
            01h release
        CH = drive (0=A:,1=B:,etc)
Return: AX = status (see #03963)
Note:   only drives on the current machine may be attached

(Table 03963)
Values for Alloy function status:
 00h    successful
 01h    invalid request
 02h    already attached
 03h    not attached
 04h    lock table full
--------N-7F24-------------------------------
INT 7F - Alloy NTNX - ATTACH/RELEASE HOST PROCESSOR
        AH = 24h
        CL = function
            02h attach host
            03h release host
Return: AX = status (see #03963)
Note:   the host processor may be attached in order to perform I/O via the host
--------N-7F25--CL00-------------------------
INT 7F - Alloy ANSK, NTNX, MW386 - GET NETWORK EXECUTIVE VERSION
        AH = 25h
        CL = 00h
Return: AH = version suffix letter
        CH = major version number
        CL = minor version number
SeeAlso: AH=25h/CL=01h
--------N-7F25--CL01-------------------------
INT 7F - Alloy ANSK, NTNX, MW386 - GET NETWORK EXECUTIVE TYPE
        AH = 25h
        CL = 01h
Return: CL = executive type (see #03964)
SeeAlso: AH=25h/CL=00h

(Table 03964)
Values for Alloy network executive type:
 00h    RTNX
 01h    ATNX
 02h    NTNX
 03h    BTNX
 04h    MW386
 05h    ANSK
--------V-7F2525-----------------------------
INT 7F - TIGA Communications Driver v2.05 - ???
        AX = 2525h
        BX = ???
Return: ???
SeeAlso: AX=4321h,AX=5555h
--------N-7F26--CL00-------------------------
INT 7F - Alloy NTNX, MW386 - GET NTNX FILE MODE
        AH = 26h
        CL = 00h
Return: AX = file mode bits (see #03965)
Note:   MW386 does not support file modes, and always returns AX=001Fh
SeeAlso: AH=26h,AH=26h/CL=06h

Bitfields for Alloy file mode bits:
Bit(s)  Description     (Table 03965)
 0      directory protection enabled
 1      extended open enabled
 2      flush on every disk write
 3      flush on every disk write in locked interval
 4      flush on reads from simultaneously opened file
--------N-7F26-------------------------------
INT 7F - Alloy NTNX - SET FILE I/O CHECKING LEVEL
        AH = 26h
        CL = check type to set/reset
            01h directory protection
            02h extended open
            03h flush on every disk write
            04h flush on disk write if any lock set during write
            05h flush on all reads if file written
        AL = new state (00h off, 01h on)
SeeAlso: AH=26h/CL=00h,AH=26h/CL=06h
--------N-7F26--CL06-------------------------
INT 7F - Alloy NTNX - CANCEL FLUSH ON WRITE
        AH = 26h
        CL = 06h
Note:   cancels flags set by AH=26h/CL=03h and AH=26h/CL=04h
SeeAlso: AH=26h/CL=00h
--------N-7F30-------------------------------
INT 7F - Alloy MW386 - GET PORT INFORMATION
        AH = 30h
        CX = MW386 port number
Return: AL = result
            FFh if port not found
            else driver unit number
                BL = port mode
                BH = port type
                    02h remote
                DH = owner's machine ID
                DL = owner's user ID
SeeAlso: INT 17/AH=8Bh
--------N-7F31-------------------------------
INT 7F - Alloy MW386 v1.x only - CHECK PORT ASSIGNMENT
        AH = 31h
        ???
Return: ???
--------N-7F37-------------------------------
INT 7F - Alloy NTNX (Host) - GET SEMAPHORE TABLE
        AH = 37h
Return: ES:AX -> semaphore table
--------N-7F37-------------------------------
INT 7F - Alloy ANSK, NTNX (Slave) - DUMP STRING TO TERMINAL
        AH = 37h
        DS:DX -> ASCIZ string to display
Note:   if the string is empty, a terminal update will be forced
--------N-7F38-------------------------------
INT 7F - Alloy NTNX (Slave), MW386 - SET NEW TERMINAL DRIVER
        AH = 38h
        AL = new terminal driver number
            FFh dummy driver
            FEh current driver
            FDh load new driver
                DS:SI -> new driver
SeeAlso: AH=39h
--------N-7F39-------------------------------
INT 7F - Alloy MW386 - SET TERMINAL DRIVER FOR ANOTHER USER
        AH = 39h
        AL = new terminal driver number
            FFh dummy driver
            FEh current driver
            FDh load new driver
                DS:SI -> new driver
        DL = user number (FFh = caller)
        DH = machine number if DL <> FFh
Return: CF set if invalid user number
        CF clear if successful
Notes:  only available to supervisors
        the new driver number will not take effect until the user is rebooted
SeeAlso: AH=38h
--------N-7F3A-------------------------------
INT 7F - Alloy MW386 - GET TERMINAL PARAMETERS
        AH = 3Ah
        DL = user number (FFh = caller)
        DH = machine number
Return: CF clear if successful
            AH = terminal driver number
            AL = baud rate (00h = 38400, 01h = 19200, etc)
            CL = parity (00h none, 01h even, 02h odd)
            CH = handshaking (00h none, 01h XON/XOFF, 02h DTR/DSR, 03h XPC)
        CF set if invalid user number
SeeAlso: AH=3Bh
--------N-7F3B-------------------------------
INT 7F - Alloy MW386 - SET TERMINAL PARAMETERS
        AH = 3Bh
        AL = baud rate (00h = 38400, 01h = 19200, etc)
        CL = parity (00h none, 01h even, 02h odd)
        CH = handshaking (00h none, 01h XON/XOFF, 02h DTR/DSR, 03h XPC)
        DL = user number (FFh = caller)
        DH = machine number for user
Return: CF set if invalid user number
Notes:  only available to supervisors
        the new parameters will take effect immediately if the user's terminal
          has not been started, else AH=3Dh must be called to post the changes
SeeAlso: AH=3Ah,AH=3Dh
--------N-7F3C-------------------------------
INT 7F - Alloy MW386 - ENABLE/DISABLE AUTOBAUD DETECT
        AH = 3Ch
        AL = new state (00h disabled, 01h enabled)
        DL = user number (FFh = caller)
        DH = machine number for user
Return: CF set if invalid user number
Note:   only available to supervisors
SeeAlso: AH=3Dh
--------N-7F3D-------------------------------
INT 7F - Alloy MW386 - POST TERMINAL CONFIGURATION CHANGES
        AH = 3Dh
Note:   should be called whenever a program changes the terminal type or its
          parameters
SeeAlso: AH=3Bh
--------N-7F41-------------------------------
INT 7F - Alloy NTNX - LOCK FILE FOR USER
        AH = 41h
        AL = user ID
        DS:DX -> ASCIZ filename
Return: AL = status (see #03966)
Note:   requests exclusive read/write access to file
SeeAlso: AH=00h,AH=41h"MW386",AH=42h"NTNX"

(Table 03966)
Values for Alloy function status:
 00h    successful
 01h    invalid function
 02h    already locked
 03h    unable to lock
 04h    lock table full or semaphore space exhausted
--------N-7F41-------------------------------
INT 7F - Alloy MW386 - LOCK SEMAPHORE FOR USER
        AH = 41h
        AL = user ID
        DS:DX -> ASCIZ semaphore name
Return: AL = status (see #03966)
SeeAlso: AH=00h,AH=42h"MW386"
--------s-7F4150BHC1-------------------------
INT 7F U - Voyetra - AAPISG - API
        AX = 4150h ('AP')
        BH = C1h
        BL = function (00h-13h)
            00h initialize (fails except first time called)
        ???
Return: AX = status???
            0000h successful
            0001h failed
Program: AAPISG is a driver by Voyetra for the Aztech Sound Galaxy sound board
BUG:    the function range check uses JL instead of JB, so it will cause a
          crash if BL >= 80h on entry
SeeAlso: AX=4331h,AX=564Dh,AX=5658h
--------N-7F42-------------------------------
INT 7F - Alloy NTNX - UNLOCK FILE FOR USER
        AH = 42h
        AL = user ID
        DS:DX -> ASCIZ filename
Return: AL = status (see #03966)
SeeAlso: AH=00h,AH=41h"NTNX",AH=42h"MW386"
--------N-7F42-------------------------------
INT 7F - Alloy MW386 - UNLOCK SEMAPHORE FOR USER
        AH = 42h
        AL = user ID
        DS:DX -> ASCIZ semaphore name
Return: AL = status
            00h successful
            01h invalid function
            03h unable to unlock semaphore
SeeAlso: AH=02h,AH=41h"MW386",AH=42h"NTNX"
--------V-7F4321-----------------------------
INT 7F - TIGA Communications Driver v2.05 - INSTALLATION CHECK
        AX = 4321h
Return: AX = 0000h if installed
Note:   INT 7F is the default, but may be overridden
SeeAlso: AH=01h"TIGA",AX=1234h,AX=2525h,AX=4321h,AX=5555h
--------s-7F4331BHC1-------------------------
INT 7F U - Voyetra - VAPISG - API
        AX = 4331h ('C1')
        BH = C1h
        BL = function (00h-7Ah)
        ???
Return: ???
Program: VAPISG is a MIDI driver by Voyetra for the Aztech Sound Galaxy
          sound board
SeeAlso: AX=4150h,AX=564Dh,AX=5658h
--------N-7F4E-------------------------------
INT 7F - Alloy MW386 v2+ - SET ERROR MODE
        AH = 4Eh
        AL = error mode flags
            bit 0: display critical disk errors
            bit 1: display sharing errors
        DX = 4E58h ("NX")
Return: AL = status
            00h successful
SeeAlso: AH=4Fh
--------N-7F4F-------------------------------
INT 7F - Alloy MW386 v2+ - SET FCB MODE
        AH = 4Fh
        AL = FCB mode
            02h read/write compatibility
            42h read/write shared
        DX = 4E58h ("NX")
Return: AL = status
            00h successful
--------V-7F5555-----------------------------
INT 7F - TIGA Communications Driver v2.05 - ???
        AX = 5555h
        BX = ???
Return: ???
SeeAlso: AX=4321h
--------s-7F564DBHC1-------------------------
INT 7F U - Voyetra Multimedia Player - VMP.EXE API
        AX = 564Dh ('VM')
        BH = C1h
        BL = function (00h-1Bh)
            00h ???
                Return: CF clear
                        AX = 0000h
        ???
Return: AX = FFFFh if invalid function
        ???
SeeAlso: AX=4331h,AX=5658h
--------s-7F5658BHC1-------------------------
INT 7F U - Voyetra - VAPISG - API
        AX = 5658h ('VX')
        BH = C1h
        BL = function (00h-1Bh)
        ???
Return: ???
Program: VAPISG is a MIDI driver by Voyetra for the Aztech Sound Galaxy
          sound board
SeeAlso: AX=4331h,AX=564Dh
--------N-7F81-------------------------------
INT 7F - Alloy NTNX - ATTACH DEVICE FOR USER
        AH = 81h
        AL = user ID
        DS:DX -> ASCIZ device name
SeeAlso: AH=82h
--------N-7F82-------------------------------
INT 7F - Alloy NTNX - RELEASE DEVICE FOR USER
        AH = 82h
        AL = user ID
        DS:DX -> ASCIZ device name
SeeAlso: AH=81h
--------N-7FA0-------------------------------
INT 7F - Alloy MW386 - GET USER NAME
        AH = A0h
        DL = user number (FFh = caller)
        DH = machine number for user
        ES:DI -> 17-byte buffer for ASCIZ user name
Return: CF set if invalid user number
SeeAlso: AH=03h,AH=A1h
--------N-7FA1-------------------------------
INT 7F - Alloy MW386 - GET MACHINE, USER, AND PROCESS NUMBER
        AH = A1h
Return: AL = process number
        DL = user number
        DH = machine number
SeeAlso: AH=03h,AH=A0h,AH=A2h
--------N-7FA2-------------------------------
INT 7F - Alloy MW386 - GET USER PRIVILEGE LEVEL
        AH = A2h
        DL = user number (FFh = caller)
        DH = machine number for user
Return: CF clear if successful
            AL = privilege level
                00h supervisor
                01h high
                02h medium
                03h low
        CF set if invalid user number
SeeAlso: AH=A1h,AH=A3h
--------N-7FA3-------------------------------
INT 7F - Alloy MW386 - GET USER LOGIN STATE
        AH = A3h
        DL = user number
        DH = machine number for user
Return: CF clear if successful
            AL = login state
                00h never logged in
                01h currently logged out
                03h currently logged in
        CF set if invalid user number or user not active
SeeAlso: AH=A2h
--------N-7FA4-------------------------------
INT 7F - Alloy MW386 - VERIFY USER PASSWORD
        AH = A4h
        DS:DX -> ASCIZ password (null-padded to 16 bytes)
Return: AL = status
            00h  accepted
            else invalid password
--------N-7FA500-----------------------------
INT 7F - Alloy MW386 - GET USER STATUS
        AX = A500h
        DI = machine number and user number
Return: CF clear if successful
            BX = user flags
                bit 5: allow messages
            CL = scan code for task manager hotkey
            CH = scan code for spooler hotkey
            DL = scan code for task swapper hotkey
            DH = modifier key status
        CF set if invalid user number
SeeAlso: AX=A501h
Index:  hotkeys;Alloy MW386
--------N-7FA501-----------------------------
INT 7F - Alloy MW386 - SET USER STATUS
        AX = A501h
        BX = user flags (see AX=A500h)
        CL = scan code for task manager hotkey
        CH = scan code for spooler hotkey
        DL = scan code for task swapper hotkey
        DH = modifier key status
        DI = machine number and user number
Return: CF set if invalid user number
Note:   must have supervisor privilege to set another user's status
SeeAlso: AX=A500h
Index:  hotkeys;Alloy MW386
--------V-7FABCDBX0000-----------------------
INT 7F - IBM 8516 Touch Screen Device Driver - GET API ENTRY
        AX = ABCDh
        BX = 0000h
Return: AX = total number of functions available
        ES:BX -> entry point array (see #03967)
SeeAlso: AX=0104h,AX=0105h

(Table 03967)
Values for 8516 Touch Screen function number:
 00h    check initialization and reset (see #03968)
 14h    set user-defined subroutine (see #03969)
Notes:  each driver function takes two stack parameters using Pascal calling
          conventions: address of parameter block and address of results buffer
        all pointers are FAR pointers
        on return, AX contains the status of the call:
            AX = 0000h successful
                 0001h invalid input
                 0002h interface error
                 0003h unable to perform function

Format of 8516 Touch Screen Function 00h parameter block:
Offset  Size    Description     (Table 03968)
 00h    WORD    0000h (function number)
Note:   this function should be called before any other device driver functions

Format of 8516 Touch Screen Function 00h results buffer:
Offset  Size    Description     (Table 03969)
 00h    WORD    touch screen status
                0000h unavailable
                0001h uncalibrated
                FFFFh available
 02h    WORD    aux mouse status (0000h not present, FFFFh present)
Notes:  the following driver parameters will have been reset to zero:
          touchdown counter, liftoff counter, position at last touch, position
          at last lift, int call mask, select on count, select off count,
          pos select on count, pos select off count.
        the following driver parameters will have been reset as listed:
          mouse emulation mode: left on
          thresholds: 46 on screen, 96 push harder, 80 push release
          x, y hysteresis: 400
          data repeat rate: 40/sec
          select mechanism: push-harder - first-touch
          coordinate origin: upper left corner
          filter frequency: medium
          data block mask: all enabled
          click lock: on
--------N-7FB0-------------------------------
INT 7F - Alloy NTNX, MW386 - RELEASE ALL SEMAPHORES FOR USER
        AH = B0h
        AL = user number
        DS = code segment
Note:   MW386 ignores AL and DS; it releases all semaphores locked using INT 67
          or INT 7F locking functions
SeeAlso: AH=B1h,AH=B2h,AH=B3h,AH=B4h
--------N-7FB1--SF00-------------------------
INT 7F - Alloy NTNX, MW386 - RELEASE NORMAL SEMAPHORES FOR USER
        AH = B1h subfn 00h
        AL = (bits 7-5) 000
             (bits 4-0) user ID
Note:   MW386 ignores AL; it releases all semaphores locked using INT 67 or
          INT 7F locking functions
SeeAlso: AH=B0h,AH=B2h,AH=B3h,AH=B4h
--------N-7FB2--SF01-------------------------
INT 7F - Alloy NTNX - RELEASE MESSAGES FOR USER
        AH = B2h subfn 01h
        AL = (bits 7-5) 001
             (bits 4-0) user ID
SeeAlso: AH=B0h,AH=B1h,AH=B3h,AH=B4h
--------N-7FB3--SF02-------------------------
INT 7F - Alloy NTNX - RELEASE FILES FOR USER
        AH = B3h subfn 02h
        AL = (bits 7-5) 010
             (bits 4-0) user ID
SeeAlso: AH=B0h,AH=B1h,AH=B2h,AH=B4h
--------N-7FB4-------------------------------
INT 7F - Alloy NTNX - RELEASE DEVICES FOR USER
        AH = B4h
        AL = user ID
SeeAlso: AH=B0h,AH=B1h,AH=B2h,AH=B3h
--------N-7FC3-------------------------------
INT 7F - Alloy MW386 - WRITE BYTE TO TERMINAL AUX PORT
        AH = C3h
        AL = byte to write
Return: CF clear if successful
        CF set on error
SeeAlso: AH=C6h
--------N-7FC5-------------------------------
INT 7F - Alloy MW386 - CHANGE CONSOLE MODE
        AH = C5h
        AL = new console mode
            00h keyboard indirect
            01h keyboard direct
            02h data handshake enforced
            03h no data handshake
Return: CF clear if successful
            AL = prior console mode
        CF set on error (caller is not remote user)
Note:   modes 2 and 3 may be used for input through the console port; no video
          output should be performed in these modes
--------N-7FC6-------------------------------
INT 7F - Alloy MW386 - WRITE BYTE TO CONSOLE PORT
        AH = C6h
        AL = byte to write
Return: CF clear if successful
        CF set on error (caller is not remote user)
Note:   any terminal driver data translation will be bypassed
SeeAlso: AH=C3h,AH=C7h
--------N-7FC7-------------------------------
INT 7F - Alloy MW386 - READ CONSOLE DATA BYTE
        AH = C7h
Return: CF clear if successful
            AL = byte read
        CF set on error (no data available or caller is not remote user)
Note:   used to read data after placing console in mode 2 or 3 (see AH=C5h)
SeeAlso: AH=C5h,AH=C6h,AH=C8h
--------N-7FC8-------------------------------
INT 7F - Alloy MW386 - READ CONSOLE DATA INTO BUFFER
        AH = C8h
        AL = maximum bytes to read
        ES:DI -> buffer for console data
Return: CF clear if successful
            CX = number of bytes read
        CF set on error (caller is not remote user)
SeeAlso: AH=C7h
--------N-7FCF-------------------------------
INT 7F - Alloy NTNX - REBOOT USER PROCESSOR
        AH = CFh
        DS:DX -> ASCIZ string containing user number to be reset
SeeAlso: AH=D6h
--------N-7FD6-------------------------------
INT 7F - Alloy MW386 - RESET NETWORK EXECUTIVE
        AH = D6h
        DS:DX -> reset packet (see #03970)
Return: never if successful
Note:   all users will be shut down immediately if successful
SeeAlso: AH=CFh

Format of Alloy MW386 reset packet:
Offset  Size    Description     (Table 03970)
 00h    DWORD   reset code (60606060h)
 04h 16 BYTEs   ASCIZ supervisor password padded with nulls
--------N-7FD7-------------------------------
INT 7F - Alloy MW386 - POST EVENT
        AH = D7h
        AL = user number (if local event)
        DX = event number
--------N-7FD8-------------------------------
INT 7F - Alloy MW386 - FLUSH DISK BUFFERS
        AH = D8h
Return: CF set on error
Note:   forces all disk buffers to be written out immediately
SeeAlso: INT 21/AH=0Dh,INT 21/AX=5D01h,INT 2F/AX=1120h
--------N-7FDB-------------------------------
INT 7F - Alloy MW386 v2+ - GET MW386 INVOCATION DRIVE
        AH = DBh
Return: AL = drive from which MW386 was started (2=C:,3=D:,etc)
--------N-7FE0-------------------------------
INT 7F - Alloy MW386 - CREATE DOS TASK
        AH = E0h
        AL = memory size (00h=128K, 01h=256K, 02h=384K, 03h=512K, 04h=640K)
        DS:DX -> ASCIZ task name (max 16 bytes)
Return: CF clear if successful
            AL = task create ID
        CF set on error
Note:   only foreground DOS tasks can use this function
SeeAlso: AH=E1h,AH=E2h,AH=E3h,AH=E6h,AH=E7h
--------N-7FE1-------------------------------
INT 7F - Alloy MW386 - GET DOS TASK PID FROM CREATE ID
        AH = E1h
        AL = create ID (from AH=E0h)
Return: AL = DOS process number
        CL = memory size (00h=128K, 01h=256K, 02h=384K, 03h=512K, 04h=640K)
Note:   this function should not be called immediately after creating a new
          DOS task, since the new task is being initialized by a concurrent
          process
SeeAlso: AH=E0h,AH=E2h
--------N-7FE2-------------------------------
INT 7F - Alloy MW386 - SWITCH TO NEW DOS TASK
        AH = E2h
        AL = DOS process number (from AH=E1h)
Return: CF set on error (invalid process number or caller not foreground task)
Notes:  specified task becomes the foreground task and current task is placed
          in the background
        may only be called by a foreground task
SeeAlso: AH=E0h,AH=E1h
--------N-7FE3-------------------------------
INT 7F - Alloy MW386 - CHANGE NAME OF DOS TASK
        AH = E3h
        DS:DX -> ASCIZ task name
---v1.x---
        AL = user number
---v2+---
        BH = user number
        BL = task number
Return: CF clear if successful
        CF set on error (invalid process number)
SeeAlso: AH=E0h,AH=E4h,AH=E5h
--------N-7FE4-------------------------------
INT 7F - Alloy MW386 - GET TASK NAME FROM PROCESS NUMBER
        AH = E4h
        ES:DI -> buffer for task name
---v1.x---
        AL = user number
---v2+---
        BH = user number
        BL = task number
Return: CF clear if successful
            CL = memory size (00h=128K, 01h=256K, 02h=384K, 03h=512K, 04h=640K)
            DX = task flags
                bit 7: MS-DOS process
            ES:DI buffer filled
        CF set on error (invalid process number)
SeeAlso: AH=E3h,AH=E5h
--------N-7FE5-------------------------------
INT 7F - Alloy MW386 - GET PROCESS NUMBER FROM TASK NAME
        AH = E5h
        DS:DX -> ASCIZ task name
        BH = user number
Return: CF clear if successful
            AL = DOS process number
            CL = memory size (00h=128K, 01h=256K, 02h=384K, 03h=512K, 04h=640K)
        CF set on error (no match for name)
SeeAlso: AH=E3h,AH=E4h
--------N-7FE6-------------------------------
INT 7F - Alloy MW386 - GET NUMBER OF AVAILABLE USER TASKS
        AH = E6h
Return: AX = number of processes available to current user
SeeAlso: AH=E0h
--------N-7FE7-------------------------------
INT 7F - Alloy MW386 - REMOVE DOS TASK
        AH = E7h
        AL = DOS process number
Return: CF clear if successful
        CF set on error (invalid process number or first process)
Note:   can only be called by a foreground task
SeeAlso: AH=E0h
--------N-7FE8-------------------------------
INT 7F - Alloy MW386 - DOS TASK DELAY
        AH = E8h
        CX = delay time in milliseconds
Note:   a delay of 0 may be used to surrender the current time slice
SeeAlso: INT 15/AX=1000h,INT 1A/AX=FF01h,INT 21/AH=EEh"DoubleDOS"
SeeAlso: INT 2F/AX=1680h
--------N-7FF0-------------------------------
INT 7F - Alloy MW386 - RESTRICT DIRECTORY TO GROUP
        AH = F0h
        AL = group number
        DS:DX -> ASCIZ directory name
Return: CF clear if successful
            AX = status
                0002h directory not found
                0003h directory not found
                0005h directory in use, cannot be restricted
                02xxh restricted to group xxh
        CF set on error
Note:   the restriction on the directory may be removed by calling this
          function with group 0, then using AH=F1h to assign the directory to
          group 0
SeeAlso: AH=F1h,AH=F2h,AH=F3h
--------N-7FF1-------------------------------
INT 7F - Alloy MW386 - ASSIGN DIRECTORY TO GROUP
        AH = F1h
        AL = group number
        DS:DX -> ASCIZ directory name
Notes:  performs permanent assignment to a group; no immediate action is taken
          unless the directory has been restricted with AH=F0h
        may be used to restrict a nonexistent directory
SeeAlso: AH=F0h
--------N-7FF2-------------------------------
INT 7F - Alloy MW386 - READ RESTRICTED DIRECTORY ENTRY
        AH = F2h
        CX = entry number
        ES:DI -> 64-byte buffer
Return: CF clear if successful
            buffer filled with 63-byte directory info and 1-byte group number
        CF set on error (invalid entry)
SeeAlso: AH=F0h,AH=F3h
--------N-7FF3-------------------------------
INT 7F - Alloy MW386 - READ RESTRICTED DIRECTORY ENTRY FOR GROUP
        AH = F3h
        AL = group number
        CX = entry number
        ES:DI -> 64-byte buffer
Return: CF clear if successful
            CX = next entry number
            buffer filled with 63-byte directory info and 1-byte group number
        CF set on error (no more matching entries)
Note:   like AH=F2h, but only returns directories belonging to the specified
          group
SeeAlso: AH=F2h
--------N-7FF8-------------------------------
INT 7F - Alloy MW386 - ASSIGN USER TO GROUP
        AH = F8h
        AL = group number
        DL = user number
        DH = machine number (currently 00h)
Return: CF clear if successful
        CF set on error (user already in maximum number of groups)
Note:   each user is allowed eight group assignments
SeeAlso: AH=F9h,AH=FAh
--------N-7FF9-------------------------------
INT 7F - Alloy MW386 - REMOVE USER FROM GROUP
        AH = F9h
        AL = group number
        DL = user number
        DH = machine number (currently 00h)
Return: CF clear if successful
        CF set if failed
SeeAlso: AH=F8h,AH=FAh
--------N-7FFA-------------------------------
INT 7F - Alloy MW386 - GET USER GROUP LIST
        AH = FAh
        DL = user number
        DH = machine number (currently 00h)
        ES:DI -> 16-byte buffer for group list
Return: CX = number of groups
        ES:DI buffer filled with group numbers
SeeAlso: AH=F8h,AH=F9h
--------N-7FFB-------------------------------
INT 7F - Alloy MW386 - ASSIGN GROUP NAME
        AH = FBh
        CL = group number
        ES:DI -> ASCIZ group name (max 17 bytes)
SeeAlso: AH=FCh
--------N-7FFC-------------------------------
INT 7F - Alloy MW386 - GET GROUP NAME
        AH = FCh
        CL = group number
        ES:DI -> 17-byte buffer for ASCIZ name
Return: ES:DI buffer filled
Note:   if the group has not been named, "(unnamed)" is returned
SeeAlso: AH=FBh
----------80---------------------------------
INT 80 - Q-PRO4 - ???
--------r-80---------------------------------
INT 80 - reserved for BASIC
Note:   this vector and INT 81 through INT ED are modified but not restored by
          Direct Access v4.0, and may be left dangling by other programs
          written with the same version of compiled BASIC
SeeAlso: INT 81"BASIC",INT 86"BASIC",INT EF"BASIC"
--------E-80---------------------------------
INT 80 - Phar Lap 386|DOS-Extender - RELOCATED PRINT-SCREEN
Note:   the extender relocates INT 05 to here by default, but can be told to
          leave INT 05 alone with the commandline (or DOSX= environment
          variable) flag -PRIVEC 5
SeeAlso: INT 05"PRINT SCREEN"
--------d-80---------------------------------
INT 80 - BusLogic BT-946C PCI SCSI Adapter - SCRATCHPAD RAM (NOT A VECTOR!)
Note:   the factory-default location for the eight bytes of scratchpad RAM
          needed by the SCSI adapter is 0000h:0200h, which is interrupt
          vectors 80h and 81h
SeeAlso: INT 81"BusLogic"
--------b-80---------------------------------
INT 80 U - AMI BIOS v1.00.12.AX1T - internal - BIOS SUBSYSTEM SELECTION
        AH = function
            00h install and initialize BIOS subsystem
                AL = ??? (00h,01h,03h)
                CX:BX = subsystem ID (see #03971)
                ESI = address from which to load, or 00000000h for default for
                        subsystem
                EDI = physical address at which to install, or 0 for default
                Note:   if CX=0000h on entry, this call is applied to all
                          subsystems whose ID has low word BX
            01h get BIOS subsystem information
                CX:BX = subsystem ID (see #03971)
                Return: AL = ???
                        AH = ???
                        EDX = uncompressed size of subsystem in bytes
                        SI = offset within subsystem of initialization
                                routine, or FFFFh if none
                        EDI = physical address of default location or 0
            02h get matching subsystem identifier
                AL = index into subsystem list (return ALth occurrence
                      matching BX)
                BX = low word of subsystem identifier
                        (0001h,0002h,0004h,0005h,000Bh,FFFFh)
                Return: CF clear if successful
                            CX = high word of ALth matching subsystem
                        CF set on error
                Note:   the system is halted if AL=00h on entry
            03h set up "big real" mode (4G segment limits)
            04h turn off "big real" mode (restore 64K segment limits)
            05h remove BIOS subsystem
                CX:BX = subsystem ID to leave out
                Note:   the system is halted if an invalid (not installed)
                          subsystem ID is specified
            06h get installed subsystem info
                CX:BX = subsystem ID (see #03971)
                Return: CF clear
                        EDX = length of ???
                        EDI = linear address of start of ???
                Note:   the system is halted if an invalid (not installed)
                          subsystem ID is specified
Return: CF clear if successful
        CF set on non-fatal error
Note:   this interrupt vector is cleared to 0000h:0000h near the end of the
          BIOS startup sequence

(Table 03971)
Values for AMI BIOS subsystem ID:
 00010001h      ROM BIOS @F000-FFFF
 00010002h      setup??? (loaded @6000-68FF)
 00010005h      APM code
 0001000Bh      language-specific error message set (English)
 00020002h      PnP/PCI ACFG code (loaded @F000-F1FF)
 0001FFFFh
 0002FFFFh      recovery code
 00030004h
 0003FFFFh      BIOS decompression code
 0004000Bh
 00060004h
 0100FFFFh      ACFG data
 10000000h      ROM @C000 (64K)
 10000001h      HMA (48K)
 10000002h      RAM @7A00 (24K)
 10000003h      RAM @8000-BFFF
 10000004h
 10000005h      real-mode address space (0-1M)
 1000000Bh      installed language-specific message set???
--------s-80----BL00-------------------------
INT 80 - SBSIM - "STARTSND" - START SOUND ON SPECIFIED DRIVER
        BL = 00h
        BH = driver number (01h = FM, 02h=DDBV, 03h=memvoice, 05h=MIDI)
Return: AX = initialization result (see #03972)
Program: SBSIM is Creative Labs' SoundBlaster Simplified Interface Module,
          which provides access to multiple drivers for the SoundBlaster
          board through a single interface
Range:  INT 80h to INT BFh, selected automatically
Note:   the SBSIM installation check consists of testing for the signature
          "SBSIM" at offset 103h in the interrupt handler's segment.
SeeAlso: INT 80/BL=01h"SBSIM",INT 80/BL=02h"SBSIM",INT 80/BL=03h"SBSIM"
SeeAlso: INT 80/BX=0000h"SBSIM"

(Table 03972)
Values for SBSIM error code:
 01h    busy--currently in use
 02h    bad driver specified
 03h    invalid function
 04h    voice process already active
 05h    couldn't start CT-VOICE
 06h    couldn't start CTVDSK
 07h    invalid SBSIM handle
 08h    buffer not initialized yet
 09h    bad filename
 0Ah    bad file handle
 0Bh    driver not started yet
 0Ch    XMS driver not installed
 0Dh    no free SBSIM handles
 0Eh    bad file type
 0Fh    couldn't free XMS block
 10h    invalid source selected
 11h    get pan position failed
 12h    set pan position failed
 13h    set volume failed
 14h    couldn't start fade/pan
 15h    couldn't stop fade/pan
 16h    couldn't pause fade/pan
 17h    not a fade/pan operation
 18h    bad mode for fade/pan
 19h    couldn't start fade/pan
 1Ah    source not fading/panning
 1Bh    FM or MIDI already playing
 1Ch    bad MIDI mapper format
--------s-80----BL01-------------------------
INT 80 - SBSIM - "PLAYSND" - PLAY MUSIC/VOICE ON SELECTED DRIVER
        BL = 01h
        BH = driver number (01h = FM, 02h=DDBV, 03h=memvoice, 05h=MIDI)
Return: AX = result (see #03972)
SeeAlso: INT 80/BL=00h"SBSIM",INT 80/BL=02h"SBSIM",INT 80/BL=04h"SBSIM"
--------s-80----BL02-------------------------
INT 80 - SBSIM - "STOPSND" - STOP MUSIC/VOICE ON SELECTED DRIVER
        BL = 02h
        BH = driver number (01h = FM, 02h=DDBV, 03h=memvoice, 05h=MIDI)
Return: nothing
SeeAlso: INT 80/BL=00h"SBSIM",INT 80/BL=01h"SBSIM",INT 80/BL=03h"SBSIM"
--------s-80----BL03-------------------------
INT 80 - SBSIM - "PAUSESND" - TEMPORARILY PAUSE PLAYBACK ON SELECTED DRIVER
        BL = 03h
        BH = driver number (01h = FM, 02h=DDBV, 03h=memvoice, 05h=MIDI)
Return: nothing
SeeAlso: INT 80/BL=00h"SBSIM",INT 80/BL=02h"SBSIM",INT 80/BL=04h"SBSIM"
SeeAlso: INT 80/BL=05h
--------s-80----BL04-------------------------
INT 80 - SBSIM - "RESUMESND" - RESTART PLAYBACK ON SELECTED DRIVER
        BL = 04h
        BH = driver number (01h = FM, 02h=DDBV, 03h=memvoice, 05h=MIDI)
Return: nothing
SeeAlso: INT 80/BL=00h"SBSIM",INT 80/BL=03h"SBSIM",INT 80/BL=05h"SBSIM"
--------s-80----BL05-------------------------
INT 80 - SBSIM - "GETSNDSTAT" - GET DRIVER'S STATUS
        BL = 05h
        BH = driver number (01h = FM, 02h=DDBV, 03h=memvoice, 05h=MIDI)
Return: AX = status
SeeAlso: INT 80/BL=00h"SBSIM",INT 80/BL=01h"SBSIM",INT 80/BL=03h"SBSIM"
--------s-80----BX0000-----------------------
INT 80 - SoundBlaster SBFM driver - GET VERSION
        BX = 0000h
Return: ???
Note:   SBFM installs at a free interrupt in the range 80h through BFh
SeeAlso: BX=0008h"SBFM",INT 2F/AX=FBFBh/ES=0000h
--------s-80----BX0000-----------------------
INT 80 - SBSIM - "QUERYVERSION" - GET VERSION
        BX = 0000h
Return: AX = version (AH = major, AL = minor)
Program: SBSIM is Creative Labs' SoundBlaster Simplified Interface Module,
          which provides access to multiple drivers for the SoundBlaster
          board through a single interface
Range:  INT 80h to INT BFh, selected automatically
Note:   the SBSIM installation check consists of testing for the signature
          "SBSIM" at offset 103h in the interrupt handler's segment.
SeeAlso: BX=0001h"SBSIM",BX=0005h"SBSIM",INT 21/AX=4402h"CTMMSYS"
SeeAlso: INT 80/BL=00h"SBSIM"
Index:  installation check;SBSIM|installation check;SoundBlaster
--------s-80----BX0001-----------------------
INT 80 - SoundBlaster SBFM driver - SET MUSIC STATUS BYTE ADDRESS
        BX = 0001h
        DX:AX -> music status byte
SeeAlso: BX=0000h"SBFM",BX=0002h"SBFM",BX=0003h"SBFM"
--------s-80----BX0001-----------------------
INT 80 - SBSIM - "QUERYDRIVERS" - CHECK DRIVERS INSTALLED
        BX = 0001h
Return: AX = bit flags for loaded drivers (see #03973)
SeeAlso: BX=0000h"SBSIM",BX=0002h"SBSIM",BX=0005h"SBSIM",INT 80/BL=00h"SBSIM"

Bitfields for SBSIM loaded drivers:
Bit(s)  Description     (Table 03973)
 0      FM
 1      double disk-buffered voice driver (DDBV)
 2      memory voice driver
 3      auxiliary driver (mixer)
 4      MIDI
--------s-80----BX0002-----------------------
INT 80 - SoundBlaster SBFM driver - SET INSTRUMENT TABLE
        BX = 0002h
        CX = number of instruments
        DX:AX -> instrument table
SeeAlso: BX=0000h"SBFM",BX=0001h"SBFM",BX=0005h"SBFM"
--------s-80----BX0002-----------------------
INT 80 - SBSIM - GETADDRESS" - GET SELECTED DRIVER'S ENTRY POINT
        BX = 0002h
        AX = driver (00h = FM,01h = DDBV,02h = memvoice,03h = mixer,04h = MIDI)
Return: CF clear if successful
            DX:AX -> entry point
        CF set on error
SeeAlso: BX=0000h"SBSIM",BX=0001h"SBSIM",BX=0005h"SBSIM",INT 80/BL=00h"SBSIM"
--------s-80----BX0003-----------------------
INT 80 - SoundBlaster SBFM driver - SET SYSTEM CLOCK RATE
        BX = 0003h
        AX = clock rate divisor (1193180 / desired frequency in Hertz)
            FFFFh to restore to 18.2 Hz
SeeAlso: BX=0000h"SBFM",BX=0001h"SBFM",BX=0004h"SBFM"
--------s-80----BX0004-----------------------
INT 80 - SoundBlaster SBFM driver - SET DRIVER CLOCK RATE
        BX = 0004h
        AX = driver clock rate divisor (1193180 / frequency in Hertz)
Note:   default frequency is 96 Hz
SeeAlso: BX=0000h"SBFM",BX=0003h"SBFM"
--------s-80----BX0005-----------------------
INT 80 - SoundBlaster SBFM driver - TRANSPOSE MUSIC
        BX = 0005h
        AX = semi-tone offset
SeeAlso: BX=0000h"SBFM",BX=0002h"SBFM",BX=0006h"SBFM"
--------s-80----BX0005-----------------------
INT 80 - SBSIM - "GETBUFFERINFO" - GET DRIVER'S BUFFER ADDRESS
        BX = 0005h
        AX = driver (00h = FM, 01h = DDB Voice, 04h = MIDI)
Return: CF clear if successful
            DX:AX -> buffer
            CX = buffer size in K
        CF set on error
Program: SBSIM is Creative Labs' SoundBlaster Simplified Interface Module,
          which provides access to multiple drivers for the SoundBlaster
          board through a single interface
Range:  INT 80h to INT BFh, selected automatically
Note:   the SBSIM installation check consists of testing for the signature
          "SBSIM" at offset 103h in the interrupt handler's segment.
SeeAlso: BX=0000h"SBSIM",BX=0001h"SBSIM",BX=0002h"SBSIM",INT 80/BL=00h"SBSIM"
--------s-80----BX0006-----------------------
INT 80 - SoundBlaster SBFM driver - PLAY MUSIC
        BX = 0006h
        DX:AX -> music block
Return: AX = status
            0000h successful
            0001h music already active
SeeAlso: BX=0000h"SBFM",BX=0007h"SBFM",BX=000Ah"SBFM",INT 1A/AX=FF04h
--------s-80----BX0007-----------------------
INT 80 - SoundBlaster SBFM driver - STOP MUSIC
        BX = 0007h
Return: AX = status
            0000h successful
            0001h music not active
SeeAlso: BX=0000h"SBFM",BX=0006h"SBFM",BX=0009h"SBFM",INT 1A/AX=FF05h
--------s-80----BX0008-----------------------
INT 80 - SoundBlaster SBFM driver - RESET DRIVER
        BX = 0008h
Return: AX = status
            0000h successful
            0001h music is active
SeeAlso: BX=0000h"SBFM"
--------s-80----BX0009-----------------------
INT 80 - SoundBlaster SBFM driver - PAUSE MUSIC
        BX = 0009h
Return: AX = status
            0000h successful
            0001h no music active
SeeAlso: BX=0000h"SBFM",BX=0007h"SBFM",BX=000Ah"SBFM",INT 1A/AX=FF01h
--------s-80----BX000A-----------------------
INT 80 - SoundBlaster SBFM driver - RESUME MUSIC
        BX = 000Ah
Return: AX = status
            0000h successful
            0001h no music paused
SeeAlso: BX=0000h"SBFM",BX=0006h"SBFM",BX=0009h"SBFM"
--------s-80----BX000B-----------------------
INT 80 - SoundBlaster SBFM driver - SET USER-DEF TRAP FOR SYSTEM-EXCLUSIVE CMDS
        BX = 000Bh
        DX:AX -> trap routine
SeeAlso: BX=0000h"SBFM"
--------s-80----BX0400-----------------------
INT 80 - SBSIM - "GETVOLUME" - GET SOURCE'S VOLUME
        BX = 0400h
        AX = sound source (see #03974)
Return: CF clear if successful
            AX = volume
        CF set on error
            AX = error code (see #03972 at INT 80/BL=00h)
SeeAlso: BX=0401h"SBSIM"

(Table 03974)
Values for SBSIM sound source:
 00h    master volume
 01h    voice
 02h    FM
 03h    CD
 04h    line in
 05h    microphone
--------s-80----BX0401-----------------------
INT 80 - SBSIM - "SETVOLUME" - SET SOURCE'S VOLUME
        BX = 0401h
        AX = sound source (see #03974)
        DX = new volume
Return: AX = result (0000h = success) (see also INT 80/BL=00h)
SeeAlso: BX=0400h"SBSIM"
--------N-8001-------------------------------
INT 80 - QPC Software PKTINT.COM - INITIALIZE
        AH = 01h
Return: AX = 0000h
        CX = FFFFh
        DX = FFFFh
Notes:  this interrupt is the WinQVTNet protected mode interface to Windows 3.0
        all buffer pointers are reset back to 0
--------N-8002-------------------------------
INT 80 - QPC Software PKTINT.COM - GET BUFFER ADDRESSES
        AH = 02h
        BX = extra bytes to allocate per packet
Return: AX = segment address of 10K buffer (for receives???)
        BX = segment address of 2K buffer (for sends???)
SeeAlso: AH=05h
--------N-8003-------------------------------
INT 80 - QPC Software PKTINT.COM - GET ENTRY POINT
        AH = 03h
Return: CX:DX -> receive call address
Note:   the returned address can be used in the packet driver calls since it
          will be a valid address in all DOS boxes
SeeAlso: AH=06h
--------N-8004-------------------------------
INT 80 - QPC Software PKTINT.COM - ENABLE???
        AH = 04h
        BX = ???
Return: ???
SeeAlso: AH=01h
--------N-8005-------------------------------
INT 80 - QPC Software PKTINT.COM - GET RECEIVE STATISTICS
        AH = 05h
Return: AX = amount of buffer currently in use
        BX = current offset in buffer
        CX = number of times receive has been called
SeeAlso: AH=02h
--------N-8006-------------------------------
INT 80 - QPC Software PKTINT.COM - REMOVE RECEIVED PACKET
        AH = 06h
Return: BX = next packet offset
        CX = number of bytes still buffered
        DX = size of packet released back into buffer pool
SeeAlso: AH=03h
--------r-81---------------------------------
INT 81 - reserved for BASIC
Note:   this vector is modified but not restored by Direct Access v4.0, and
          may be left dangling by other programs written with the same version
          of compiled BASIC
SeeAlso: INT 80"BASIC",INT 82"BASIC"
--------N-81---------------------------------
INT 81 - IBM TOKEN RING ADAPTER - ???
SeeAlso: INT 82"TOKEN RING",INT 91"TOKEN RING"
--------d-81---------------------------------
INT 81 - BusLogic BT-946C PCI SCSI Adapter - SCRATCHPAD RAM (NOT A VECTOR!)
Note:   the factory-default location for the eight bytes of scratchpad RAM
          needed by the SCSI adapter is 0000h:0200h, which is interrupt
          vectors 80h and 81h
SeeAlso: INT 80"BusLogic"
--------b-81---------------------------------
INT 81 - AMI WinBIOS - SECOND HARD DRIVE AUTODETECTION
Notes:  used by WinBIOS with core version of July 1994 or later
        QEMM 7.5 began using this interrupt internally after the QPAT3
          maintenance release when searching for "ROM holes", causing a
          lengthy delay during bootup.  Adding the QEMM parameter RH:N will
          avoid the QEMM call to INT 81 and speed up the boot process
--------O-81---------------------------------
INT 81 - Paragon Technology PTS/DOS 6.5x, S/DOS 1.0 - API
--------s-810200---------------------------
INT 81 - Gravis UltraSound - MegaEm - PROCESS COMMAND LINE
        AX = 0200h
        BX = PSP segment
        SI = ??? (data area)
Return: AX = status (see #03975)
        BL = emulation state
            bit 1   Emulation is on
            bit 2   Emulation is off
Program: MegaEm is a protected-mode SoundBlaster, SoundCanvas, and MT-32
          emulator for the Gravis UltraSound
Range:  INT 81 to INT FF (see INT 21/AX=FD12h), selected by scanning for an
          interrupt with vector 0000h:0000h
SeeAlso: AX=0202h,AX=0300h,AX=0400h,INT 21/AX=FD12h/BX=3457h

(Table 03975)
Values for MegaEm status:
 0000h  successful
 0001h  invalid command line optie
 0002h  display options
 0003h  ???
 0004h  invalid number of voices specified
 0005h  could not load enough patches to provide acceptable emulation
 0006h  to many warnings on patch loading
 0007h  ??? (not used anymore)
 0008h  /CO and SCSI don't work together
 0009h  invalid music volume
 000Ah  invalid master volume
 000Bh  /SC switch is no longer valid
 0100h  ??? (some error on patch loading)
--------s-810202---------------------------
INT 81 - Gravis UltraSound - MegaEm - ???
        AX = 0202h
Return: AX = ???
SeeAlso: AX=0200h,AX=0300h,AX=0400h,INT 21/AX=FD12h/BX=3457h
--------s-810300---------------------------
INT 81 - Gravis UltraSound - MegaEm - LOAD SAMPLE ???
        AX = 0300h
Return: AX = ???
SeeAlso: AX=0200h,AX=0202h,AX=0400h,INT 21/AX=FD12h/BX=3457h
--------s-810400---------------------------
INT 81 - Gravis UltraSound - MegaEm - ???
        AX = 0400h
        BX = ??? (segment)
Return: AX = ???
        BX = ???
Program: MegaEm is a protected-mode SoundBlaster, SoundCanvas, and MT-32
          emulator for the Gravis UltraSound
SeeAlso: AX=0200h,AX=0202h,AX=0300h,INT 21/AX=FD12h/BX=3457h
--------s-812010------------------------
INT 81 - Gravis UltraSound - MEGA_EM v3.0+ - INT 78 REDIRECT
        AX = 2010h
        ???
Return: ???
Note:   MegaEm calls this function from its INT 78 handler, and then
          immediately returns (via RETF in v3.10, thus leaving the flags on
          the stack); this permits it to operate while hooking only one
          interrupt through the memory manager in protected mode
SeeAlso: AX=2011h,AX=2012h
--------s-812011------------------------
INT 81 - Gravis UltraSound - MEGA_EM v3.0+ - NMI REDIRECT
        AX = 2011h
        ???
Return: ???
Note:   MegaEm calls this function from its NMI (INT 02) handler, and then
          immediately returns; this permits it to operate while hooking only
          one interrupt through the memory manager in protected mode
SeeAlso: AX=2010h,AX=2012h
--------s-812012------------------------
INT 81 - Gravis UltraSound - MEGA_EM v3.0+ - SOUNDCARD IRQ REDIRECT
        AX = 2012h
        ???
Return: ???
Note:   MegaEm calls this function from its GUS IRQ handler, and then
          immediately returns; this permits it to operate while hooking only
          one interrupt through the memory manager in protected mode
SeeAlso: AX=2010h,AX=2011h
--------s-812015------------------------
INT 81 - Gravis UltraSound - MEGA_EM v3.0+ - ???
        AX = 2015h
        ???
Return: ???
--------r-82---------------------------------
INT 82 - reserved for BASIC
SeeAlso: INT 81"BASIC",INT 83"BASIC"
--------N-82---------------------------------
INT 82 - IBM TOKEN RING ADAPTER - ???
        AH = function
            00h display message???
                DS:BX -> string
        ???
Return: ???
SeeAlso: INT 81"TOKEN RING",INT 91"TOKEN RING"
--------r-83---------------------------------
INT 83 - reserved for BASIC
SeeAlso: INT 82"BASIC",INT 84"BASIC"
--------s-8300-------------------------------
INT 83 - JM Pro Tracker v5.0 - ???
        AH = 00h
        ???
Return: CF clear (successful)
        AX = ??? (0302h)
Program: JM Pro Tracker is a public-domain resident .MOD (digital music)
          player by Josha Munnik

(Table 03976)
Values for JM Pro Tracker error code:
 000Ah  ???
 000Bh  ???
 0014h  ???
 001Eh  some required parameters have not yet been set
 001Fh  already playing???
 FExxh  busy (API call already in progress)
 FFxxh  invalid function number
--------s-8301-------------------------------
INT 83 - JM Pro Tracker v5.0 - ???
        AH = 01h
        DX = ??? or FFFFh
        ???
Return: CF clear if successful
        CF set on error
            AX = error code (see #03976)
--------s-8302-------------------------------
INT 83 - JM Pro Tracker v5.0 - ???
        AH = 02h
        BX = ???
        ???
Return: CF clear if successful
            AX = ???
            BX = ???
            CX = ???
            DX = ???
            SI = ???
        CF set on error
            AX = error code (000Ah,000Bh,other) (see #03976)
--------s-8303-------------------------------
INT 83 - JM Pro Tracker v5.0 - ???
        AH = 03h
        BX = ??? (only low four bits, must be nonzero)
        CX = ???
        ???
Return: CF clear if successful
        CF set on error
            AX = error code (0014h) (see #03976)
--------s-8304-------------------------------
INT 83 - JM Pro Tracker v5.0 - SET DMA BUFFER???
        AH = 04h
        CX = number of bytes in suggested buffer
        ES:DI -> suggested buffer for DMA transfers???
Return: CF clear if successful
            ES:AX -> actual buffer (filled with bytes of 80h)
            CX = actual length (multiple of 4)
        CF set on error
            AX = error code (see #03976)
Note:   the buffer must not cross a 64K DMA page boundary
--------s-8305-------------------------------
INT 83 - JM Pro Tracker v5.0 - SET ??? BUFFER
        AH = 05h
        CX = length of buffer
        ES:DI -> buffer for/containing ???
Return: CF clear (successful)
SeeAlso: AH=06h,AH=07h,AH=18h
--------s-8306-------------------------------
INT 83 - JM Pro Tracker v5.0 - SET ??? BUFFER
        AH = 06h
        CX = length of buffer
        ES:DI -> buffer for/containing ???
Return: CF clear (successful)
SeeAlso: AH=05h,AH=07h,AH=18h
--------s-8307-------------------------------
INT 83 - JM Pro Tracker v5.0 - SET ??? BUFFER
        AH = 07h
        BX = ???
        CX = length of buffer
        ES:DI -> buffer for/containing ???
Return: CF clear (successful)
SeeAlso: AH=05h,AH=06h,AH=18h
--------s-8308-------------------------------
INT 83 - JM Pro Tracker v5.0 - START PLAYING???
        AH = 08h
        ???
Return: CF clear if successful
           ???
        CF set on error
            AX = error code (001Eh,001Fh) (see #03976)
SeeAlso: AH=09h,AH=0Ah
--------s-8309-------------------------------
INT 83 - JM Pro Tracker v5.0 - PAUSE???
        AH = 09h
        ???
Return: CF clear if successful
        CF set on error
            AX = error code (see #03976)
SeeAlso: AH=08h,AH=0Ah
--------s-830A-------------------------------
INT 83 - JM Pro Tracker v5.0 - RESUME???
        AH = 0Ah
        ???
Return: CF clear if successful
        CF set on error
            AX = error code (001Fh) (see #03976)
SeeAlso: AH=08h,AH=09h
--------s-830B-------------------------------
INT 83 - JM Pro Tracker v5.0 - ???
        AH = 0Bh
        BX = ???
        ???
Return: CF clear if successful
        CF set on error
--------s-830C-------------------------------
INT 83 - JM Pro Tracker v5.0 - ???
        AH = 0Ch
        DX bit 5 = ???
        ???
Return: CF clear if successful
            BX = ??? (FFFFh)
            CX = ??? (0000h)
            DX = ???
        CF set on error
            AX = error code (see #03976)
--------s-830D-------------------------------
INT 83 - JM Pro Tracker v5.0 - ???
        AH = 0Dh
        BX = ???
        ???
Return: CF clear (successful)
--------s-830E-------------------------------
INT 83 - JM Pro Tracker v5.0 - ???
        AH = 0Eh
        BX = ??? (ignored if ES:DI = 0000h:0000h)
        ES:DI -> ??? or 0000h:0000h
Return: CF clear (successful)
--------s-830F-------------------------------
INT 83 - JM Pro Tracker v5.0 - ???
        AH = 0Fh
        ???
Return: CF clear if successful
            AX = ???
        CF set on error
            AX = error code (see #03976)
--------s-8310-------------------------------
INT 83 - JM Pro Tracker v5.0 - ???
        AH = 10h
        BL = subfunction???
        CX = ???
        DX = ???
        ???
Return: CF clear if successful
            CX = DX = ???
        CF set on error
            AX = error code (see #03976)
SeeAlso: AH=18h
--------s-8311-------------------------------
INT 83 - JM Pro Tracker v5.0 - ???
        AH = 11h
        BL = ???
        CX = ???
Return: CF clear (successful)
--------s-8312-------------------------------
INT 83 - JM Pro Tracker v5.0 - CLEAR ???
        AH = 12h
Return: nothing
--------s-8313-------------------------------
INT 83 - JM Pro Tracker v5.0 - ???
        AH = 13h
        BX = ???
Return: CF clear (successful)
--------s-8314-------------------------------
INT 83 - JM Pro Tracker v5.0 - ???
        AH = 14h
        ???
Return: CF clear (successful)
        BX = ???
--------s-8315-------------------------------
INT 83 - JM Pro Tracker v5.0 - GET ???
        AH = 15h
        BX = what to get (zero/nonzero)
Return: CF clear if successful
            BX = ???
            DX = ???
        CF set on error
            AX = error code (see #03976)
--------s-8316-------------------------------
INT 83 - JM Pro Tracker v5.0 - ???
        AH = 16h
        AL = subfunction
            00h ???
                Return: BX = ???
                        CX = ???
                        DX = ???
                        ES:DI -> ???
                        CF indicates ???
            01h ???
                Return: BX = ???
                        CX = ???
                        DX = ???
Return: CF clear if successful
        CF set on error
            AX = error code (FFxxh) (see #03976)
--------s-8317-------------------------------
INT 83 - JM Pro Tracker v5.0 - UNHOOK API INTERRUPT
        AH = 17h
Return: CF clear if successful
        CF set on error (hooked by another program)
--------s-8318-------------------------------
INT 83 - JM Pro Tracker v5.0 - SET BUFFERS
        AH = 18h
        ES:DI -> buffer-pointer structure (see #03977)
Return: nothing
SeeAlso: AH=05h,AH=06h,AH=07h,AH=10h

Format of JM Pro Tracker buffer-pointer structure:
Offset  Size    Description     (Table 03977)
 00h    WORD    length of ??? buffer (see AH=05h)
 02h    DWORD   -> ??? buffer (see AH=05h)
 06h    WORD    length of ??? buffer (see AH=06h)
 08h    DWORD   -> ??? buffer (see AH=06h)
 0Ch    WORD    length of ??? buffer (see AH=07h)
 0Eh    DWORD   -> ??? buffer (see AH=07h)
 12h    WORD    ??? (see AH=07h)
 14h    WORD    ??? (see AH=10h) (subfunction 01h)
 16h    WORD    ??? (see AH=10h) (subfunction 01h)
 18h    WORD    ??? (see AH=10h) (subfunction 00h)
 1Ah    WORD    ??? (see AH=10h) (subfunction 01h)
--------r-84---------------------------------
INT 84 - reserved for BASIC
SeeAlso: INT 83"BASIC",INT 85"BASIC"
--------r-85---------------------------------
INT 85 - reserved for BASIC
Note:   INT 80 through INT ED are modified but not restored by Direct Access
          v4.0, and may be left dangling by other programs written with the
          same version of compiled BASIC
SeeAlso: INT 84"BASIC",INT 86"BASIC"
--------N-86---------------------------------
INT 86 - NetBIOS - ORIGINAL INT 18
Note:   some implementations of NetBIOS reportedly relocate INT 18 here
SeeAlso: INT 18"BOOT HOOK"
--------r-86---------------------------------
INT 86 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 85"BASIC",INT 87"BASIC"
--------r-86---------------------------------
INT 86 - APL*PLUS/PC - Terminate APL session and return to DOS
SeeAlso: INT 21/AH=4Ch,INT 87"APL"
--------r-87---------------------------------
INT 87 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 86"BASIC",INT 88"BASIC"
--------r-87---------------------------------
INT 87 - APL*PLUS/PC - ???
SeeAlso: INT 86"APL",INT 88/AL=00h
--------v-87---------------------------------
INT 87 - VIRUS - "ZeroHunt" - VIRAL CODE (NOT A VECTOR!)
Note:   the ZeroHunt virus copies its resident code down to 0000h:021Ch and
          following
SeeAlso: INT 8B"VIRUS"
--------r-88---------------------------------
INT 88 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 87"BASIC",INT 89"BASIC"
--------r-88--00-----------------------------
INT 88 - APL*PLUS/PC - CREATE OBJECT OF ARBITRARY RANK OR SHAPE
        AL = 00h
        BX = STPTR of the variable to be assigned
        ES:SI -> model of type, rank, and shape (see #03978)
Return: ES:DI -> first data byte of object
        DX:CX = number of elements in the object
SeeAlso: INT 88/AL=01h,INT 88/AL=08h,INT C8"APL"

Format of APL*PLUS/PC shape model:
Offset  Size    Description     (Table 03978)
 00h    BYTE    type
                01h character (2-byte dimension sizes)
                02h integer (2-byte dimension sizes)
                08h floating point (2-byte dimension sizes)
                11h character (4-byte dimension sizes)
                12h integer (4-byte dimension sizes)
                18h floating point (4-byte dimension sizes)
 01h    BYTE    rank
 02h    (D)WORD first dimension of shape
 N      (D)WORD second dimension of shape
        ...
--------r-88--01-----------------------------
INT 88 - APL*PLUS/PC - CREATE CHARACTER SCALAR/VECTOR/MATRIX <64K IN SIZE
        AL = 01h
        AH = rank
        BX = STPTR of the variable to be assigned
        CX = first dimension (if any)
        DX = second dimension (if any)
Return: ES:DI -> object
        CX = number of elements in the object
Note:   each dimension must be 32767 or smaller
SeeAlso: AL=00h,AL=02h,AL=08h,INT C8"APL"
--------r-88--02-----------------------------
INT 88 - APL*PLUS/PC - CREATE INTEGER SCALAR/VECTOR/MATRIX <64K IN SIZE
        AL = 02h
        AH = rank
        BX = STPTR of the variable to be assigned
        CX = first dimension (if any)
        DX = second dimension (if any)
Return: ES:DI -> object
        CX = number of elements in the object
Note:   each dimension must be 32767 or smaller
SeeAlso: AL=01h,AL=08h,INT C8"APL"
--------r-88--08-----------------------------
INT 88 - APL*PLUS/PC - CREATE FLOATING POINT SCALAR/VECTOR/MATRIX <64K IN SIZE
        AL = 08h
        AH = rank
        BX = STPTR of the variable to be assigned
        CX = first dimension (if any)
        DX = second dimension (if any)
Return: ES:DI -> object
        CX = number of elements in the object
Note:   each dimension must be 32767 or smaller
SeeAlso: AL=01h,AL=02h,INT C8"APL"
--------r-88--F5-----------------------------
INT 88 - APL*PLUS/PC - FORCE OBJECT INTO REAL WORKSPACE FROM VIRTUAL
        AL = F5h
        BX = STPTR of object
SeeAlso: INT C8"APL"
--------r-88--F6-----------------------------
INT 88 - APL*PLUS/PC - MAKE NAME IMMUNE FROM OUTSWAPPING
        AL = F6h
        BX = STPTR of object
SeeAlso: AL=F7h,AL=F8h,INT C8"APL"
--------r-88--F7-----------------------------
INT 88 - APL*PLUS/PC - MAKE NAME ELIGIBLE FOR OUTSWAPPING
        AL = F7h
        BX = STPTR of object
SeeAlso: AL=F6h,AL=F8h,INT C8"APL"
--------r-88--F8-----------------------------
INT 88 - APL*PLUS/PC - REPORT WHETHER NAME IS ELIGIBLE FOR OUTSWAPPING
        AL = F8h
        BX = STPTR of object
Return: BX = name's outswapping status
            0000h eligible
            0001h not eligible
SeeAlso: AL=F6h,AL=F7h,INT C8"APL"
--------r-88--F9-----------------------------
INT 88 - APL*PLUS/PC - DETERMINE NAME STATUS
        AL = F9h
        ES:SI -> name
        CX = length of name
Return: CF set if name ill-formed or already in use
            BX = STPTR if already in symbol table
        CF clear if name is available for use
            BX = 0000h
Note:   does not force the name into the workspace
SeeAlso: AL=FEh,AL=FFh,INT C8"APL"
--------r-88--FC-----------------------------
INT 88 - APL*PLUS/PC - DETERMINE IF MEMORY AVAIL WITHOUT GARBAGE COLLECTION
        AL = FCh
        BX = amount of memory needed (paragraphs)
Return: CF clear if memory available
        CF set if a workspace compaction is required
SeeAlso: AL=FDh,INT C8"APL"
--------r-88--FD-----------------------------
INT 88 - APL*PLUS/PC - PERFORM GARBAGE COLLECTION AND RETURN AVAILABLE MEMORY
        AL = FDh
Return: BX = number of paragraphs available in workspace
SeeAlso: AL=FCh,INT C8"APL"
--------r-88--FE-----------------------------
INT 88 - APL*PLUS/PC - CREATE NAME
        AL = FEh
        ES:SI -> name
        CX = length of name
Return: BX = STPTR of name
        DX = interpreter's data segment
SeeAlso: AL=F9h,AL=FFh,INT C8"APL"
--------r-88--FF-----------------------------
INT 88 - APL*PLUS/PC - DETERMINE NAME STATUS
        AL = FFh
        ES:SI -> name
        CX = length of name
Return: CF set if name ill-formed or already in use
            BX = STPTR if already in symbol table
        CF clear if name is available for use
            BX = 0000h
Note:   forces the name into the workspace and makes it immune from outswapping
SeeAlso: AL=F9h,AL=FEh,INT C8"APL"
--------r-89---------------------------------
INT 89 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 88"BASIC",INT 8A"BASIC"
--------r-89---------------------------------
INT 89 - APL*PLUS/PC - ???
Note:   STSC moved its interrupts from 86h-8Ch to C6h-CCh, but did not delete
          the older interrupts
SeeAlso: INT C9"APL"
--------r-8A---------------------------------
INT 8A - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 89"BASIC",INT 8B"BASIC"
--------r-8A---------------------------------
INT 8A - APL*PLUS/PC - PRINT SCREEN
Note:   same as INT 05
SeeAlso: INT 05"PRINT SCREEN",INT 8C"APL",INT CA"APL"
--------r-8B---------------------------------
INT 8B - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 8A"BASIC",INT 8C"BASIC"
--------r-8B---------------------------------
INT 8B - APL*PLUS/PC - BEEP
Note:   same as printing a ^G via INT 21/AH=02h
SeeAlso: INT 21/AH=02h,INT CB"APL"
--------v-8B---------------------------------
INT 8B - VIRUS - "ZeroHunt" - INSTALLATION CHECK (NOT A VECTOR!)
Note:   if the ZeroHunt virus is resident, this vector will contain either
          EE83h:019Bh (ZH-411) or EE83h:019Fh (ZH-415)
SeeAlso: INT 70"VIRUS",INT 87"VIRUS",INT 9C"VIRUS"
--------r-8C---------------------------------
INT 8C - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-8C---------------------------------
INT 8C - APL*PLUS/PC - CLEAR SCREEN MEMORY
        AX = flag
            0000h do not save display attributes
            0001h save attributes
SeeAlso: INT CC"APL"
--------r-8D---------------------------------
INT 8D - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-8E---------------------------------
INT 8E - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-8F---------------------------------
INT 8F - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-90---------------------------------
INT 90 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-90---------------------------------
INT 90 - APL*PLUS/PC - USED BY PORT 10 PRINTER DRIVER
--------r-91---------------------------------
INT 91 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------N-91---------------------------------
INT 91 - IBM TOKEN RING ADAPTER - ???
SeeAlso: INT 81"TOKEN RING",INT 82"TOKEN RING",INT 93"TOKEN RING"
--------!---Section--------------------------
Interrupt List, part 18 of 18
Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------r-92---------------------------------
INT 92 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------N-92---------------------------------
INT 92 - Sangoma X.25 INTERFACE PROGRAM
        BX:DX -> control block
SeeAlso: INT 68"Sangoma"
--------e-92E1-------------------------------
INT 92 - Da Vinci eMail Dispatcher INTERFACE
        AH = E1h
        AL = function
        BX = stack count (number of words to push)
        CX:DX -> stack data (in word-reversed order ready to push)
Return: AX = status (see #03979)
Note:   preserves BP, DS, SI, DI; other registers may be destroyed

(Table 03979)
Values for Da Vinci eMail function status:
 0001h  success
 FF97h  "ERS_NOT_AVAILABLE"
 FF99h  "ERS_TOO_MANY_NAMES"
 FF9Ah  "ERS_BAD_NAME_PASSWORD"
 FFE3h  "ERS_NAME_NOT_FOUND"
 FFF8h  "ERS_USE_STRING" (call NetGetError to get error string)
 FFFFh  "ERS_NO_SUCH_FILE"
--------e-92E100-----------------------------
INT 92 - Da Vinci eMail Dispatcher - "NetInitStart"
        AX = E100h
        BX = size of parameter block in words (000Ah)
        CX:DX -> parameter block (see #03980)
Return: AX = 0001h success
Desc:   this function is used to initialize the dispatcher
SeeAlso: AX=E101h,AX=E103h

Format of Da Vinci eMail "NetInitStart" parameter block:
Offset  Size    Description     (Table 03980)
 00h    WORD    segment of ???
 02h    WORD    offset of ???
 04h    WORD    high part of long ???
 06h    WORD    low part of long ???
 08h    WORD    high part of long ???
 0Ah    WORD    low part of long ???
 0Ch    WORD    high part of long ???
 0Eh    WORD    low part of long ???
 10h    WORD    high part of long ???
 12h    WORD    low part of long ???
--------e-92E101BX0000-----------------------
INT 92 - Da Vinci eMail Dispatcher - "NetInitCheck"
        AX = E101h
        BX = 0000h
        CX:DX ignored
Return: AX = 0001h success
SeeAlso: AX=E100h,AX=E180h
--------e-92E102BX0000-----------------------
INT 92 - Da Vinci eMail Dispatcher - "NetCheckDriver"
        AX = E102h
        BX = 0000h
        CX:DX ignored
Return: AX = 0001h success
Desc:   this function is used to determine if the dispatcher is loaded
SeeAlso: AX=E10Bh,AX=E180h
--------e-92E103BX0000-----------------------
INT 92 - Da Vinci eMail Dispatcher - "NetTerminate"
        AX = E103h
        BX = 0000h
        CX:DX ignored
Return: AX = status (see #03979)
SeeAlso: AX=E100h
--------e-92E104-----------------------------
INT 92 - Da Vinci eMail Dispatcher - "NetWhereIs"
        AX = E104h
        BX = size of parameter block in words (0006h)
        CX:DX -> parameter block (see #03981)
Return: AX = status (see #03979)
Desc:   this function is used to verify node address for usernames
SeeAlso: AX=E180h

Format of Da Vinci eMail "NetWhereIs" parameter block:
Offset  Size    Description     (Table 03981)
 00h    WORD    segment of node address buffer
 02h    WORD    offset of node address buffer
 04h    WORD    segment of uppercase username
 06h    WORD    offset of uppercase username
 08h    WORD    segment of "DVSEMAIL"
 0Ah    WORD    offset of "DVSEMAIL"
--------e-92E105-----------------------------
INT 92 - Da Vinci eMail Dispatcher - "NetOpen"
        AX = E105h
        BX = size of parameter block in words (0007h)
        CX:DX -> parameter block (see #03982)
Return: AX = 0000h Error
        AX = handle
Desc:   this function is used to open a submission channel
SeeAlso: AX=E10Ah,AX=E106h,AX=E108h

Format of Da Vinci eMail "NetOpen" parameter block:
Offset  Size    Description     (Table 03982)
 00h    WORD    operation (1 = read, 2 = write)
 02h    WORD    segment of uppercase To: username
 04h    WORD    offset of uppercase To: username
 06h    WORD    segment of "DVSEMAIL"
 08h    WORD    offset of "DVSEMAIL"
 0Ah    WORD    segment of node address
 0Ch    WORD    offset of node address
--------e-92E106BX0004-----------------------
INT 92 - Da Vinci eMail Dispatcher - "NetRead"
        AX = E106h
        BX = 0004h
        CX:DX -> parameter block
Return: AX = 0001h
SeeAlso: AX=E108h
--------e-92E107BX0002-----------------------
INT 92 - Da Vinci eMail Dispatcher - "NetGetError"
        AX = E107h
        BX = 0002h
        CX:DX -> parameter block
Return: AX = 0001h
SeeAlso: AX=E109h,AX=E180h
--------e-92E108-----------------------------
INT 92 - Da Vinci eMail Dispatcher - "NetWrite"
        AX = E108h
        BX = size of parameter block in words (0004h)
        CX:DX -> parameter block (see #03983)
Return: AX = amount written
Desc:   This function is used to write transactions to the dispatcher.
          The command block is written first and then another call is used
          to write the associated data.
SeeAlso: AX=E106h

Format of Da Vinci eMail "NetWrite" parameter block:
Offset  Size    Description     (Table 03983)
 00h    WORD    buffer count (see #03985)
 02h    WORD    segment of command buffer (see #03984)
 04h    WORD    offset of command buffer
 06h    WORD    handle from NetOpen

Format of Da Vinci eMail command buffer:
Offset  Size    Description     (Table 03984)
 00h    BYTE    command
                21h '!' Protocol commands for remote control
                41h 'A' Authorization protocol element
                42h 'B' Return(back) routing information
                    Associated data is the From: username
                43h 'C' Carbon Copy list
                    Associated data is a comma delimitted list of usernames
                44h 'D' Distribution list
                    Associated data is a comma delimitted list of usernames
                45h 'E' Mail end marker
                    No associated data
                48h 'H' Mail message header
                    Associated data is a message header buffer
                4Dh 'M' Mail message
                    Associated data is the body of the message
                4Fh 'O' Object
                50h 'P' Paperclip attachment
                52h 'R' Routing information
                    Associated data is the To: username
                53h 'S' Subject
                    Associated data is the subject of the message
                54h 'T' Trail of Reply/Forwards
 01h    BYTE    subcommand
 02h    DWORD   length of associated data

Format of Da Vinci eMail message header buffer:
Offset  Size    Description     (Table 03985)
 00h 30 BYTEs   subject line
 1Eh 24 BYTEs   To
 36h 24 BYTEs   From
 4Eh    DWORD   Time
                BYTE    00h
                BYTE    hour
                BYTE    minute
                BYTE    second
 52h    DWORD   Date
                BYTE    00h
                BYTE    year
                BYTE    month
                BYTE    day
 56h    DWORD   serial number (00000000h)
 5Ah    WORD    mail types (see #03986)
 5Ch    WORD    special types (0)

Bitfields for Da Vinci eMail mail types:
Bit(s)  Description     (Table 03986)
 7      blind carbon copy
 6      carbon copy
 5      priority
 4      confidential
 3      certified
 2      bulk
 1-0    class (first, second, third, bulk)
--------e-92E109-----------------------------
INT 92 - Da Vinci eMail Dispatcher - "NetErrorFix" (UNUSED)
        AX = E109h
        BX = size of parameter block in words (0001h)
        CX:DX -> parameter block (see #03987)
Return: AX = FF97h (ERS_NOT_AVAILABLE)
SeeAlso: AX=E107h,AX=E180h

Format of Da Vinci eMail "NetErrorFix" parameter block:
Offset  Size    Description     (Table 03987)
 00h    WORD    ???
--------e-92E10A-----------------------------
INT 92 - Da Vinci eMail Dispatcher - "NetClose"
        AX = E10Ah
        BX = size of parameter block in words (0001h)
        CX:DX -> parameter block (see #03988)
Return: AX = 0001h
Desc:   this function is used to close a dispatcher handle
SeeAlso: AX=E105h

Format of Da Vinci eMail "NetClose" parameter block:
Offset  Size    Description     (Table 03988)
 00h    WORD    handle from NetOpen
--------e-92E10B-----------------------------
INT 92 - Da Vinci eMail Dispatcher - "NetCheckQueue"
        AX = E10Bh
        BX = size of parameter block in words (0004h)
        CX:DX -> parameter block (see #03989)
Return: AX = 0001h
SeeAlso: AX=E102h,AX=E10Ch

Format of Da Vinci eMail "NetCheckQueue" parameter block:
Offset  Size    Description     (Table 03989)
 00h    WORD    segment of 24-byte username buffer
 02h    WORD    offset of 24-byte username buffer
 04h    WORD    segment of 24-byte protocol buffer
 06h    WORD    offset of 24-byte protocol buffer
--------e-92E10C-----------------------------
INT 92 - Da Vinci eMail Dispatcher - "NetReadQueue"
        AX = E10Ch
        BX = size of parameter block in words (0002h)
        CX:DX -> parameter block (see #03990)
Return: AX = 0001h
SeeAlso: AX=E10Bh

Format of Da Vinci eMail "NetReadQueue" parameter block:
Offset  Size    Description     (Table 03990)
 00h    WORD    Segment of 128 byte node address buffer
 02h    WORD    Offset of 128 byte node address buffer
--------e-92E10D-----------------------------
INT 92 - Da Vinci eMail Dispatcher - "NetSubmitName"
        AX = E10Dh
        BX = size of parameter block in words (0006h)
        CX:DX -> parameter block (see #03991)
Return: AX = status (see #03979)
Desc:   this function is used to verify username/password
SeeAlso: AX=E10Eh

Format of Da Vinci eMail "NetSubmitName" parameter block:
Offset  Size    Description     (Table 03991)
 00h    WORD    segment of uppercase password string
 02h    WORD    offset of uppercase password string
 04h    WORD    segment of uppercase username string
 06h    WORD    offset of uppercase username string
 08h    WORD    segment of "DVSEMAIL"
 0Ah    WORD    offset of "DVSEMAIL"
--------e-92E10E-----------------------------
INT 92 - Da Vinci eMail Dispatcher - "NetRemoveName"
        AX = E10Eh
        BX = size of parameter block in words (0004h)
        CX:DX -> parameter block (see #03992)
Return: AX = 0001h
Desc:   this function is used to remove a username
SeeAlso: AX=E10Dh

Format of Da Vinci eMail "NetRemoveName" parameter block:
Offset  Type    Description     (Table 03992)
 00h    WORD    segment of uppercase username
 02h    WORD    offset of uppercase username
 04h    WORD    segment of "DVSEMAIL"
 06h    WORD    offset of "DVSEMAIL"
--------e-92E10FBX0000-----------------------
INT 92 - Da Vinci eMail Dispatcher - IS ANYONE THERE? QUERY
        AX = E10Fh
        BX = 0000h
        CX:DX ignored
Return: AX = 0001h
SeeAlso: AX=E180h
--------e-92E110-----------------------------
INT 92 - Da Vinci eMail Dispatcher - "NetGetAltRoute"
        AX = E110h
        BX = size of parameter block in words (0006h)
        CX:DX -> parameter block (see #03993)
Return: AX = 0001h
SeeAlso: AX=E111h,AX=E113h

Format of Da Vinci eMail "NetGetAltRoute" parameter block:
Offset  Size    Description     (Table 03993)
 00h  6 WORDs   ???
--------e-92E111-----------------------------
INT 92 - Da Vinci eMail Dispatcher - "NetDeleteAltRoutes"
        AX = E111h
        BX = size of parameter block in words (0004h)
        CX:DX -> parameter block (see #03994)
Return: AX = 0001h
SeeAlso: AX=E110h,AX=E113h

Format of Da Vinci eMail "NetDeleteAltRoutes" parameter block:
Offset  Size    Description     (Table 03994)
 00h  4 WORDs   ???
--------e-92E112-----------------------------
INT 92 - Da Vinci eMail Dispatcher - "NetChangePassword"
        AX = E112h
        BX = size of parameter block in words (0008h)
        CX:DX -> parameter block (see #03995)
Return: AX = 0001h
SeeAlso: AX=E180h

Format of Da Vinci eMail "NetChangePassword" parameter block:
Offset  Size    Description     (Table 03995)
 00h  8 WORDs   ???
--------e-92E113-----------------------------
INT 92 - Da Vinci eMail Dispatcher - "NetSetAltRoute"
        AX = E113h
        BX = size of parameter block in words (0008h)
        CX:DX -> parameter block (see #03996)
Return: AX = 0001h
SeeAlso: AX=E110h,AX=E111h

Format of Da Vinci eMail "NetSetAltRoute" parameter block:
Offset  Size    Description     (Table 03996)
 00h  8 WORDs   ???
--------e-92E175-----------------------------
INT 92 - Da Vinci eMail Dispatcher - BECOME MICRO TSR
        AX = E175h
Return: AX = 0012h
        BX = PSP
SeeAlso: AX=E180h
--------e-92E180-----------------------------
INT 92 - Da Vinci eMail Dispatcher - INSTALLATION CHECK
        AX = E180h
Return: AX = 0012h if installed
        ES:DX -> '$'-terminated driver information string
SeeAlso: AX=E102h,AX=E105h,AX=E10Fh,AX=E175h
--------r-93---------------------------------
INT 93 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------N-93---------------------------------
INT 93 - IBM TOKEN RING ADAPTER - ???
SeeAlso: INT 81"TOKEN RING",INT 91"TOKEN RING"
--------r-94---------------------------------
INT 94 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------s-94----SI0000-----------------------
INT 94 u - PCM driver - INITIALIZE SOUND
        SI = 0000h
        ES:BX -> parameters
Return: ???
Program: PCM.COM is a sound driver for Media Vision's Pro Audio Spectrum
          sound boards
InstallCheck:   test for the signature string "PCMDRIVER" immediately preceding
          the interrupt handler; the word preceding the signature gives the PCM
          driver's version
SeeAlso: SI=0001h,SI=0002h,SI=0003h,SI=0004h,SI=0005h,SI=000Ah
Index:  installation check;PCM driver|PCM.COM;installation check
Index:  PCM driver;installation check
--------s-94----SI0001-----------------------
INT 94 u - PCM driver - INITIALIZE PCM
        SI = 0001h
        ES:BX -> parameters
Return: ???
SeeAlso: SI=0000h,SI=0002h,SI=0003h,SI=000Ah
--------s-94----SI0002-----------------------
INT 94 u - PCM driver - INITIALIZE PCM INFO
        SI = 0002h
        ES:BX -> parameters (see #03997)
Return: ???
SeeAlso: SI=0000h,SI=0001h,SI=0003h,SI=000Ah

Format of PCM driver function 0002h parameters:
Offset  Size    Description     (Table 03997)
 00h    DWORD   rate
 04h    WORD    channel number
 06h    WORD    "comp"
 08h    WORD    "dsize"
--------s-94----SI0003-----------------------
INT 94 u - PCM driver - INITIALIZE DMA BUFFER
        SI = 0003h
        ES:BX -> parameters (see #03998)
Return: ???
SeeAlso: SI=0000h,SI=000Ah,SI=000Bh

Format of PCM driver function 0003h parameters:
Offset  Size    Description     (Table 03998)
 00h    DWORD   -> DMA buffer
 04h    WORD    size of DMA buffer
 06h    WORD    number of divisions
--------s-94----SI0004-----------------------
INT 94 u - PCM driver - INITIALIZE USER FUNCTION
        SI = 0004h
        ES:BX -> parameters (see #03999)
Return: ???
SeeAlso: SI=0000h,SI=0001h

Format of PCM driver function 0004h parameters:
Offset  Size    Description     (Table 03999)
 00h    DWORD   -> user function
--------s-94----SI0005-----------------------
INT 94 u - PCM driver - BEGIN AUDIO PLAY
        SI = 0005h
Return: ???
SeeAlso: SI=0000h,SI=0006h,SI=0007h,SI=0009h
--------s-94----SI0006-----------------------
INT 94 u - PCM driver - BEGIN AUDIO RECORD
        SI = 0006h
Return: ???
SeeAlso: SI=0005h,SI=0007h,SI=0009h
--------s-94----SI0007-----------------------
INT 94 u - PCM driver - PAUSE AUDIO PLAY/RECORD
        SI = 0007h
Return: ???
SeeAlso: SI=0005h,SI=0006h,SI=0008h
--------s-94----SI0008-----------------------
INT 94 u - PCM driver - RESUME AUDIO PLAY/RECORD
        SI = 0008h
Return: ???
SeeAlso: SI=0007h
--------s-94----SI0009-----------------------
INT 94 u - PCM driver - STOP AUDIO PLAY/RECORD
        SI = 0009h
Return: ???
SeeAlso: SI=0005h,SI=0006h,SI=0007h
--------s-94----SI000A-----------------------
INT 94 u - PCM driver - UNHOOK INTERRUPTS AND TURN OFF DMA
        SI = 000Ah
Return: ???
SeeAlso: SI=0000h,SI=0001h,SI=0003h
Index:  uninstall;PCM driver
--------s-94----SI000B-----------------------
INT 94 u - PCM driver - FIND VALID DMA BUFFER IN HUGE MEMORY BLOCK
        SI = 000Bh
        ES:BX -> parameters (see #04000)
Return: ???
SeeAlso: SI=0003h

Format of PCM driver functio 000Bh parameters:
Offset  Size    Description     (Table 04000)
 00h    DWORD   -> memory block to contain DMA buffer
 04h    WORD    desired size of DMA buffer
--------s-94----SI000D-----------------------
INT 94 u - Media Vision PCM.COM - GET STATUS
        SI = 000Dh
Return: AX = status (0000h = waiting) (see #04001)

Bitfields for PCM.COM status:
Bit(s)  Description     (Table 04001)
 0      playing
 1      recording
 2      SBplaying
 3      SBrecording
 14     SBpaused
 15     paused
--------s-94----SI8000-----------------------
INT 94 u - Media Vision PCM.COM - GET INTERNAL DMA BUFFER ADDRESS
        SI = 8000h
Return: DX:AX -> DMA buffer
Program: PCM.COM is a superset of the standard PCM driver which provides
          additional functions for fine control of the driver
InstallCheck:   for the Media Vision PCM.COM "shark" functions, test for the
          signature "PCM-SHARK" at offset 107h in the INT 94 handler's segment
SeeAlso: SI=8001h,SI=8004h
Index:  installation check;Media Vision PCM.COM|PCM.COM;installation check
Index:  Media Vision PCM.COM;"shark" functions
--------s-94----SI8001-----------------------
INT 94 u - Media Vision PCM.COM - GET INTERNAL DMA BUFFER SIZE AND DIVISIONS
        SI = 8001h
Return: AX = DMA buffer size
        DX = divisions
SeeAlso: SI=8000h
--------s-94----SI8002-----------------------
INT 94 u - Media Vision PCM.COM - CHECK BOARD ADDRESS
        SI = 8002h
Return: AX = status
            0000h if board not at specified I/O address
            other if board found
Note:   the I/O address is specified by ORing the base I/O port shifted left
          four bits into SI before calling INT 94
SeeAlso: SI=8000h
--------s-94----SI8004-----------------------
INT 94 u - Media Vision PCM.COM - GET INTERNAL NOTE BUFFER
        SI = 8004h
Return: AX = offset of note buffer (segment = segment of internal DMA buffer)
        DX = size of buffer in note structures
SeeAlso: SI=8000h
--------s-94----SI8005-----------------------
INT 94 u - Media Vision PCM.COM - SINGLE-STEP QUEUE
        SI = 8005h
Return: ???
--------s-94----SI8011-----------------------
INT 94 u - Media Vision PCM.COM - INITIALIZE
        SI = 8011h
        ES:BX -> "iobf91" structure
Return: ???
--------s-94----SI8012-----------------------
INT 94 u - Media Vision PCM.COM - LOAD SOUND FOR LATER PLAY THROUGH KEYBOARD
        SI = 8012h
        ES:BX -> "i94f92buf" structure
Return: ???
SeeAlso: SI=8013h,SI=8014h
--------s-94----SI8013-----------------------
INT 94 u - Media Vision PCM.COM - GET INTERNAL SOUND USAGE
        SI = 8013h
Return: AX = number of sounds used
        DX = maximum handles
--------s-94----SI8014-----------------------
INT 94 u - Media Vision PCM.COM - GET DATA FOR SPECIFIED SOUND
        SI = 8014h
        ES:BX -> "i94f92buf" structure to be filled in
                sound number field set to desired sound
Return: AX = status
            0000h successful
            FFFFh sound number out of range
SeeAlso: SI=8012h,SI=8013h
--------s-94----SI8015-----------------------
INT 94 u - Media Vision PCM.COM - GET/SET INTERNAL DMA BUFFER
        SI = 8015h
        ES:BX -> DMA info structure (see #04002)
Return: ???

Format of PCM.COM DMA info structure:
Offset  Size    Description     (Table 04002)
 00h    DWORD   -> DMA buffer (offset FFFFh = return current buffer info)
 04h    WORD    DMA buffer size
 06h    WORD    divisions
--------s-94----SI8016-----------------------
INT 94 u - Media Vision PCM.COM - SIMULATE DOUBLE-SHIFT HOTKEY
        SI = 8016h
        AX = hotkey number (01h-08h)
Return: ???
SeeAlso: AL=02h/SI=8017h
--------s-94--01SI8017-----------------------
INT 94 u - Media Vision PCM.COM - CTRL-G INTERCEPT
        AL = 01h
        SI = 8017h
        AH = new state (00h off, 01h on)
Return: ???
SeeAlso: AL=02h/SI=8017h
--------s-94--02SI8017-----------------------
INT 94 u - Media Vision PCM.COM - DOUBLE-SHIFT-HOTKEY SOUND FEATURE
        AL = 02h
        SI = 8017h
        AH = new state (00h off, 01h on)
Return: ???
--------s-94--04SI8017-----------------------
INT 94 u - Media Vision PCM.COM - RANDOM SOUND FEATURE
        AL = 04h
        SI = 8017h
        AH = new state
            00h off
            01h on
                CX = minimum delay
                DX = maximum delay
Return: ???
--------s-94--08SI8017-----------------------
INT 94 u - Media Vision PCM.COM - NO ACTIVITY FEATURE
        AL = 08h
        SI = 8017h
        AH = new state
            00h off
            01h on
                DX:CX = delay
Return: ???
SeeAlso: AL=10h/SI=8017h
--------s-94--10SI8017-----------------------
INT 94 u - Media Vision PCM.COM - TIMER CONTROL
        AL = 10h
        SI = 8017h
        AH = timer options (see #04003)
        DX:CX = delay if AH bit 7 set (one-shot if DX bit 15 set)
Return: ???
SeeAlso: AL=08h/SI=8017h

Bitfields for PCM.COM timer options:
Bit(s)  Description     (Table 04003)
 7      set timer
 6      timer active (timer turned off if clear)
 5-0    timer number
--------s-94----SI8018-----------------------
INT 94 u - Media Vision PCM.COM - GET INFO
        SI = 8018h
        AL = what to get
            00h "F92state"
            01h "F92bkgd"
            02h "I10timer"
            03h "I08state"
Return: DX:AX -> desired information
--------r-95---------------------------------
INT 95 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-95---------------------------------
INT 95 - APL*PLUS/PC - DETERMINE R= SPACE
Note:   use only when the R= option is invoked on entering APL
--------r-96---------------------------------
INT 96 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------U-96---------------------------------
INT 96 U - KILL.COM, QKILL.COM - POP UP
Program: KILL.COM is a TSR utility that allows you to terminate programs
         by calling INT 21/AH=4Ch or reboot the computer (author unknown);
         QKILL.COM is a modification of KILL.COM by Solar Designer that
         supports QEMM's Quick Boot feature
Notes:  This interrupt is intercepted but not chained by KILL.COM; it is never
          called by KILL.COM itself. It points into the middle of KILL.COM's
          INT 09 handler and assumes specific values have been placed on the
          stack (thus it can't be called as an interrupt).
        To invoke KILL, use the following code:
                pushf
                push cs
                push offset $+0Dh
                push ax
                push es
                push 0
                pop  es
                jmp  dword ptr es:[96h*4]
--------r-97---------------------------------
INT 97 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-98---------------------------------
INT 98 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-99---------------------------------
INT 99 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-9A---------------------------------
INT 9A - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT 99,INT 9B
--------r-9B---------------------------------
INT 9B - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT 9A,INT 9C"BASIC"
--------r-9C---------------------------------
INT 9C - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT 9B,INT 9D"BASIC"
--------v-9C---------------------------------
INT 9C - VIRUS - "INT13" - ORIGINAL INT 13h VECTOR
SeeAlso: INT 8B"VIRUS",INT 9D"VIRUS",INT 9E"VIRUS",INT 9F"VIRUS"
--------r-9D---------------------------------
INT 9D - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT 9C"BASIC",INT 9E"BASIC"
--------v-9D---------------------------------
INT 9D - VIRUS - "INT13" - ROM INT 13h ENTRY POINT
Note:   this vector is used by the virus to store the result of a call to
          INT 2F/AH=13h
SeeAlso: INT 2F/AH=13h,INT 9C"VIRUS",INT 9E"VIRUS",INT 9F"VIRUS"
--------r-9E---------------------------------
INT 9E - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT 9D"BASIC",INT 9F"BASIC"
--------v-9E---------------------------------
INT 9E - VIRUS - "INT13" - ORIGINAL INT 21h VECTOR
SeeAlso: INT 70"VIRUS",INT 9C"VIRUS",INT 9D"VIRUS",INT E0"VIRUS"
--------r-9F---------------------------------
INT 9F - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT 9D"BASIC",INT A0"BASIC"
--------v-9F---------------------------------
INT 9F - VIRUS - "INT13" - STORAGE FOR USER INT 13h VECTOR
Note:   while it is infecting a file, the INT13 virus grabs INT 13 and uses
          this interrupt to store the existing INT 13 vector for later
          restoration
SeeAlso: INT 9C"VIRUS",INT 9D"VIRUS",INT D3"VIRUS"
--------r-A0---------------------------------
INT A0 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT 9F"BASIC",INT A1"BASIC"
--------r-A0---------------------------------
INT A0 - APL*PLUS/PC - USED BY APL/GSS*CGI GRAPHICS INTERFACE
SeeAlso: INT 59"GSS"
--------r-A1---------------------------------
INT A1 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT A0"BASIC",INT A2"BASIC"
--------r-A2---------------------------------
INT A2 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT A1"BASIC",INT A3"BASIC"
--------r-A3---------------------------------
INT A3 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT A2"BASIC",INT A4"BASIC"
--------r-A4---------------------------------
INT A4 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT A3"BASIC",INT A5"BASIC"
--------U-A4---------------------------------
INT A4 U - Right Hand Man - API
        AH = function number (v3.3 supports functions 00h-52h)
Return: CF set on error
        CF clear if successful
Program: Right Hand Man is a TSR desk-top utility originally by Red E Products
          which has evolved into Futurus Team
Note:   this interrupt is only hooked while popped up
SeeAlso: INT 2F/AX=A4E0h
--------r-A5---------------------------------
INT A5 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT A4"BASIC",INT A6"BASIC"
--------r-A6---------------------------------
INT A6 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT A5"BASIC",INT A7"BASIC"
--------r-A7---------------------------------
INT A7 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-A8---------------------------------
INT A8 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-A9---------------------------------
INT A9 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-AA---------------------------------
INT AA - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-AB---------------------------------
INT AB - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-AC---------------------------------
INT AC - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-AD---------------------------------
INT AD - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-AE---------------------------------
INT AE - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-AF---------------------------------
INT AF - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-B0---------------------------------
INT B0 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-B1---------------------------------
INT B1 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-B2---------------------------------
INT B2 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-B3---------------------------------
INT B3 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------U-B370-------------------------------
INT B3 - ZIPKEY - GET VERSION
        AH = 70h
Return: AH = major version
        AL = minor version
        CL = number of states and territories in current database
        DH = year of current database - 1900
        DL = month of current database's file date
Program: ZIPKEY is a resident ZIPCODE database by Eric Isaacson
Note:   if installed, the string "ZIPKEY" is present at offset 75h in the
          interrupt handler's segment, and the byte at 7Bh contains the API
          version number (00h for v1.x, 01h for v2.0)
--------U-B371-------------------------------
INT B3 - ZIPKEY - CONVERT TWO-LETTER ABBREVIATION TO STATE CODE
        AH = 71h
        BX = abbreviation, in either case (first letter in BL)
Return: CF set on error
            AL = FFh
        CF clear if successful
            AL = ZIPKEY state code
SeeAlso: AH=72h
--------U-B372-------------------------------
INT B3 - ZIPKEY - CONVERT STATE CODE TO TWO-LETTER ABBREVIATION
        AH = 72h
        BL = ZIPKEY state code
Return: CF set on error
            AX destroyed
        CF clear if successful
            AX = abbreviation, in upper case
SeeAlso: AH=71h,AH=73h
--------U-B373-------------------------------
INT B3 - ZIPKEY - CONVERT STATE CODE TO STATE NAME
        AH = 73h
        BL = ZIPKEY state code
        ES:DI -> buffer for name
Return: CF set on error
            AX destroyed
        CF clear if successful
            ES:DI points one byte beyond end of name
SeeAlso: AH=72h
--------U-B374-------------------------------
INT B3 - ZIPKEY - CONVERT ZIPCODE TO ASCII DIGITS
        AH = 74h
        DX = zipcode region (0-999)
        CH = last two digits of zipcode (0-99)
        ES:DI -> buffer
Return: CF set on error
            AX destroyed
        CF clear if successful
            ES:DI points one byte beyond end of digit string
--------U-B375-------------------------------
INT B3 - ZIPKEY - LOOK UP STATE CODE FOR ZIPCODE
        AH = 75h
        DX = zipcode region (0-999)
        CH = last two digits of zipcode (0-99)
Return: CF set on error (zipcode not found)
            AL = suggested state code, FFh if none
        CF clear if successful
            AL = ZIPKEY state code
            BX = area code (v2.0+)
SeeAlso: AH=76h,AH=79h
--------U-B376-------------------------------
INT B3 - ZIPKEY - LOOK UP CITY AND STATE FOR ZIPCODE
        AH = 76h
        DX = zipcode region (0-999)
        CH = last two digits of zipcode (0-99)
        ES:DI -> buffer for name
Return: CF set on error
            AL = suggested state code, FFh if none
            ES:DI buffer filled with suggested city name
        CF clear if successful
            AL = ZIPKEY state code
            BX = area code (v2.0+)
            ES:DI points one byte beyond end of name
SeeAlso: AH=75h,AH=78h,AH=7Eh
--------U-B377-------------------------------
INT B3 - ZIPKEY - PLAY BACK EXIT KEY FOR ENTRY WITH GIVEN ZIPCODE
        AH = 77h
        DX = zipcode region (0-999)
        CH = last two digits of zipcode (0-99)
        BX = 16-bit BIOS keycode for a defined ZIPKEY alternate exit key
Return: CF set on error
            AX destroyed
        CF clear if successful
            zipcode specification as defined by the BX keystroke is placed in
              keyboard buffer, as if the user had popped up ZIPKEY and exited
              by pressing the key specified by BX
--------U-B378-------------------------------
INT B3 - ZIPKEY - LOOK UP ZIPCODES FOR A GIVEN STATE AND CITY
        AH = 78h
        BL = ZIPKEY state code
        DS:SI -> city name, terminated with 0Dh if complete name, 00h if prefix
Return: BH = number of matching entries (set to 51 if more than 50)
        DX = zipcode region of first match (0-999)
        CL = last two digits of first zipcode in the range (0-99)
        CH = last two digits of last zipcode in the range (0-99)
        AX destroyed
SeeAlso: AH=79h,AH=7Ah
--------U-B379-------------------------------
INT B3 - ZIPKEY - LOOK UP ZIPCODES FOR A GIVEN CITY
        AH = 79h
        BL = ZIPKEY state code of first state to search
        DS:SI -> city name, terminated with 0Dh if complete name, 00h if prefix
Return: AL = ZIPKEY state code of first matching state
        BH = number of matching entries (set to 51 if more than 50)
        DX = zipcode region of first match (0-999)
        CL = last two digits of first zipcode in first range (0-99)
        CH = last two digits of last zipcode in first range (0-99)
Note:   to find all matching cities, repeat search with BL set to one more than
          the returned AL
SeeAlso: AH=78h,AH=7Ah
--------U-B37A-------------------------------
INT B3 - ZIPKEY - FETCH AN ENTRY FROM A PREVIOUS LOOKUP
        AH = 7Ah
        BL = case number (0 to one less than value returned in BH by lookup)
Return: AL = ZIPKEY state code
        DX = zipcode region (0-999)
        CL = last two digits of first zipcode in the range (0-99)
        CH = last two digits of last zipcode in the range (0-99)
SeeAlso: AH=78h,AH=79h
--------U-B37B-------------------------------
INT B3 - ZIPKEY - GET VALUES NEEDED TO SAVE ZIPKEY CONTEXT
        AH = 7Bh
Return: BL = maximum number of characters for a city name
        BH = ZIPKEY state code for last city-name search, or FFh if none
        CX:DX = internal code identifying last city search
        AX destroyed
SeeAlso: AH=7Ch
--------U-B37C-------------------------------
INT B3 - ZIPKEY - RESTORE ZIPKEY CONTEXT
        AH = 7Ch
        BL = maximum number of characters for a city name
        BH = ZIPKEY state code for last city-name search, or FFh if none
        CX:DX = internal code returned by AH=7Bh
Return: CF set on error
        CF clear if successful
        AX destroyed
SeeAlso: AH=7Bh
--------U-B37D-------------------------------
INT B3 - ZIPKEY - REQUEST POP UP
        AH = 7Dh
        BL = index number to simulate pressing a hotkey
            FFh for immediate popup with no playback on return
Return: CF set on error
            AL = error code
                FDh already busy with another request
                FEh illegal function
        CF clear if successful
            AX destroyed
            window popped up and was closed by the user
SeeAlso: AH=70h
--------U-B37E-------------------------------
INT B3 - ZIPKEY - GET NAME OF PRIMARY CITY FOR A ZIPCODE REGION
        AH = 7Eh
        DX = zipcode region (0-999)
        ES:DI -> buffer for name
Return: CF set on error
            AL = FFh region does not exist
        CF clear if successful
            AL = ZIPKEY state code
            ES:DI points one byte beyond end of name
SeeAlso: AH=76h
--------U-B37F-------------------------------
INT B3 - ZIPKEY - ENABLE/DISABLE HOTKEYS
        AH = 7Fh
        BL = function
            00h turn off hotkeys
            01h turn on hotkeys
            02h return hotkey status
            03h toggle hotkey status
Return: AL = hotkey status
            00h off
            01h on
--------U-B380-------------------------------
INT B3 - ZIPKEY v2.0+ - DETERMINE STATE FOR AREA CODE
        AH = 80h
        BX = telephone area code (decimal)
Return: CF clear if successful
            AL = ZIPKEY state code
            DX = first ZIP region for state (03E8h if Canada)
            CX = number of ZIP regions in state
        CF set on error
            AL = FFh
            DX = 03E9h
--------r-B4---------------------------------
INT B4 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-B4---------------------------------
INT B4 - StackMan - REQUEST NEW STACK
Return: SS:SP -> new stack
Program: StackMan is a freeware stack manager by Franz Veldman of ESaSS B.V.
          which functions as a replacement for the DOS STACK= command as well
          as permitting multiple TSRs to share a pool of stack space
InstallCheck:   test for the string "STACKXXX" at offset 0Ah from the
          interrupt handler
SeeAlso: INT 2F/AX=C9FFh,INT B5"STACKMAN"
Index:  installation check;STACKMAN
--------r-B5---------------------------------
INT B5 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT B4"BASIC",INT B6"BASIC"
--------r-B5---------------------------------
INT B5 - StackMan - RESTORE ORIGINAL STACK
        SS:SP -> stack returned by INT B4
Return: SS:SP restored to value before INT B4
SeeAlso: INT 2F/AX=C9FFh,INT B4"StackMan"
--------m-B5---------------------------------
INT B5 U - Netroom NETSWAP4 - ???
        ???
Return: ???
SeeAlso: INT 31/AH=57h
--------r-B6---------------------------------
INT B6 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT B5"BASIC",INT B7"BASIC"
--------y-B6---------------------------------
INT B6 - (NOT A VECTOR!) - USED BY TBFENCE
Program: TBFence is a security program by ESaSS B.V. which transparently
          encrypts floppies and optionally allows only encrypted diskettes to
          be accessed
Note:   the low word of this vector (0000h:02D8h) contains the segment of the
          TBFence INT 13h code, which starts with the signature word E487h;
          this forms the installation check
        the highest byte of this vector contains the start of a FAR JMP
          instruction to ???
SeeAlso: INT B7"TBFENCE"
Index:  installation check;TBFence
--------r-B7---------------------------------
INT B7 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT B6"BASIC",INT B8"BASIC"
--------y-B7---------------------------------
INT B7 - TBFENCE - ???
SeeAlso: INT B6"TBFENCE"
--------r-B8---------------------------------
INT B8 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT B7"BASIC",INT B9"BASIC"
--------r-B9---------------------------------
INT B9 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-BA---------------------------------
INT BA - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-BB---------------------------------
INT BB - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-BC---------------------------------
INT BC - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-BD---------------------------------
INT BD - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-BE---------------------------------
INT BE - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT BD"BASIC",INT BF"BASIC"
--------Q-BE---------------------------------
INT BE - DESQview/X - ???
Note:   points at an IRET
SeeAlso: INT 15/AX=BFDEh/BX=0006h,INT 63"DESQview"
--------r-BF---------------------------------
INT BF - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT BE"BASIC",INT C0"BASIC"
--------r-C0---------------------------------
INT C0 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT BF"BASIC",INT C1"BASIC"
--------d-C0---------------------------------
INT C0 - AMI BIOS - DRIVE 0 DATA
Note:   this vector is used by some AMI BIOSes to store the first four bytes
          of the hard disk parameter table
SeeAlso: INT 41"HARD DISK 0",INT 60"Adaptec",INT C1"AMI",INT C2"AMI"
SeeAlso: INT C3"AMI",INT C4"AMI"
--------r-C1---------------------------------
INT C1 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT C0"BASIC",INT C2"BASIC"
--------d-C1---------------------------------
INT C1 - AMI BIOS - DRIVE 0 DATA
Note:   this vector is used by some AMI BIOSes to store the second four bytes
          of the hard disk parameter table
SeeAlso: INT 41"HARD DISK 0",INT 60"Adaptec",INT C0"AMI",INT C2"AMI"
SeeAlso: INT C3"AMI"
--------r-C2---------------------------------
INT C2 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT C1"BASIC",INT C3"BASIC"
--------d-C2---------------------------------
INT C2 - AMI BIOS - DRIVE 0 DATA
Note:   this vector is used by some AMI BIOSes to store the third four bytes
          of the hard disk parameter table
SeeAlso: INT 41"DISK 0",INT 60"Adaptec",INT C0"AMI",INT C1"AMI",INT C3"AMI"
--------r-C3---------------------------------
INT C3 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT C2"BASIC",INT C4"BASIC"
--------d-C3---------------------------------
INT C3 - AMI BIOS - DRIVE 0 DATA
Note:   this vector is used by some AMI BIOSes to store the final four bytes
          of the hard disk parameter table
SeeAlso: INT 41"DISK 0",INT 60"Adaptec",INT C0"AMI",INT C1"AMI",INT C2"AMI"
--------r-C4---------------------------------
INT C4 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT C3"BASIC",INT C5"BASIC"
--------d-C4---------------------------------
INT C4 - AMI BIOS - DRIVE 1 DATA
Note:   this vector is used by some AMI BIOSes to store the first four bytes
          of the second hard disk's parameter table
SeeAlso: INT 46"HARD DISK 1",INT 64"Adaptec",INT C0"AMI",INT C5"AMI"
SeeAlso: INT C6"AMI",INT C7"AMI"
--------r-C5---------------------------------
INT C5 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT C4"BASIC",INT C6"BASIC"
--------d-C5---------------------------------
INT C5 - AMI BIOS - DRIVE 1 DATA
Note:   this vector is used by some AMI BIOSes to store the second four bytes
          of the second hard disk's parameter table
SeeAlso: INT 46"HARD DISK 1",INT 64"Adaptec",INT C0"AMI",INT C4"AMI"
SeeAlso: INT C6"AMI",INT C7"AMI"
--------r-C6---------------------------------
INT C6 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT C5"BASIC",INT C7"BASIC"
--------r-C6---------------------------------
INT C6 - APL*PLUS/PC - IDENTICAL TO INT 86
Note:   STSC moved its interrupts from 86h-8Ch to C6h-CCh, but did not delete
          the older interrupts
SeeAlso: INT 86"APL"
--------d-C6---------------------------------
INT C6 - AMI BIOS - DRIVE 1 DATA
Note:   this vector is used by some AMI BIOSes to store the third four bytes
          of the second hard disk's parameter table
SeeAlso: INT 46"HARD DISK 1",INT 64"Adaptec",INT C0"AMI",INT C4"AMI"
SeeAlso: INT C5"AMI",INT C7"AMI"
--------r-C7---------------------------------
INT C7 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT C6"BASIC",INT C8"BASIC"
--------r-C7---------------------------------
INT C7 - APL*PLUS/PC - ???
Note:   STSC moved its interrupts from 86h-8Ch to C6h-CCh, but did not delete
          the older interrupts
SeeAlso: INT 87"APL"
--------d-C7---------------------------------
INT C7 - AMI BIOS - DRIVE 1 DATA
Note:   this vector is used by some AMI BIOSes to store the final four bytes
          of the second hard disk's parameter table
SeeAlso: INT 46"HARD DISK 1",INT 64"Adaptec",INT C0"AMI",INT C4"AMI"
SeeAlso: INT C5"AMI",INT C6"AMI"
--------r-C8---------------------------------
INT C8 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT C7"BASIC",INT C9"BASIC"
--------r-C8---------------------------------
INT C8 - APL*PLUS/PC - IDENTICAL TO INT 88
Note:   STSC moved its interrupts from 86h-8Ch to C6h-CCh, but did not delete
          the older interrupts
SeeAlso: INT 88/AL=00h"APL",INT 88/AL=08h"APL"
--------r-C9---------------------------------
INT C9 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT C8"BASIC",INT CA"BASIC"
--------r-C9---------------------------------
INT C9 - APL*PLUS/PC - ???
Note:   STSC moved its interrupts from 86h-8Ch to C6h-CCh, but did not delete
          the older interrupts
SeeAlso: INT 89"APL"
--------r-CA---------------------------------
INT CA - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT C9"BASIC",INT CB"BASIC"
--------r-CA---------------------------------
INT CA - APL*PLUS/PC - PRINT SCREEN
Note:   STSC moved its interrupts from 86h-8Ch to C6h-CCh, but did not delete
          the older interrupts
SeeAlso: INT 8A"APL"
--------r-CB---------------------------------
INT CB - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT CA"BASIC",INT CC"BASIC"
--------r-CB---------------------------------
INT CB - APL*PLUS/PC - BEEP
Notes:  STSC moved its interrupts from 86h-8Ch to C6h-CCh, but did not delete
          the older interrupts
        same as printing a ^G via INT 21/AH=02h
SeeAlso: INT 8B"APL"
--------r-CC---------------------------------
INT CC - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT CB"BASIC",INT CD"BASIC"
--------r-CC---------------------------------
INT CC - APL*PLUS/PC - CLEAR SCREEN MEMORY
        AX = flag
            0000h do not save display attributes
            0001h save attributes
Note:   STSC moved its interrupts from 86h-8Ch to C6h-CCh, but did not delete
          the older interrupts
SeeAlso: INT 8C"APL"
--------r-CD---------------------------------
INT CD - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT CC"BASIC",INT CE"BASIC"
--------r-CD---------------------------------
INT CD - STSC APL*PLUS/PC - MAY BE USED IN FUTURE RELEASES
--------r-CE---------------------------------
INT CE - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT CD"BASIC",INT CF"BASIC"
--------r-CE---------------------------------
INT CE - STSC APL*PLUS/PC - MAY BE USED IN FUTURE RELEASES
--------r-CF---------------------------------
INT CF - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT CE"BASIC",INT D0"BASIC"
--------r-CF---------------------------------
INT CF - APL*PLUS/PC - DEFAULT LOW-RESOLUTION TIMER FOR QUAD MF FUNCTION
SeeAlso: INT E0"APL"
--------r-D0---------------------------------
INT D0 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT CF"BASIC",INT D1"BASIC"
--------r-D0---------------------------------
INT D0 - STSC APL*PLUS/PC - MAY BE USED IN FUTURE RELEASES
--------U-D0---------------------------------
INT D0 - [not a vector!] - NJFRERAM SIGNATURE VECTOR
Program: NJFRERAM is a resident free-memory display utility by Mike "Nifty
          James" Blaszczak
Note:   if NJFRERAM is installed, this vector points at the signature "NJ"
Index:  installation check;NJFRERAM
--------r-D1---------------------------------
INT D1 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT D0"BASIC",INT D2"BASIC"
--------r-D1---------------------------------
INT D1 - STSC APL*PLUS/PC - MAY BE USED IN FUTURE RELEASES
--------r-D2---------------------------------
INT D2 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT D1"BASIC",INT D3"BASIC"
--------r-D2---------------------------------
INT D2 - STSC APL*PLUS/PC - MAY BE USED IN FUTURE RELEASES
--------r-D3---------------------------------
INT D3 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT D2"BASIC",INT D4"BASIC"
--------r-D3---------------------------------
INT D3 - STSC APL*PLUS/PC - MAY BE USED IN FUTURE RELEASES
--------v-D3---------------------------------
INT D3 - VIRUS - "Antiexe" - RELOCATED INT 13
SeeAlso: INT 9F"VIRUS"
--------r-D4---------------------------------
INT D4 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT D3"BASIC",INT D5"BASIC"
--------r-D4---------------------------------
INT D4 - STSC APL*PLUS/PC - MAY BE USED IN FUTURE RELEASES
--------O-D400-------------------------------
INT D4 O - PC-MOS/386 v5.01 - OBSOLETE FUNCTIONS
        AH = 00h and 01h
Return: nothing
Desc:   PC-MOS/386 v5.01 reports that these functions are no longer supported
          and enters an endless loop
Program: PC-MOS/386 is a multitasking/multiuser MS-DOS-compatible operating
          system by The Software Link, Inc.
--------O-D402-------------------------------
INT D4 - PC-MOS/386 v3.0+ - GET SYSTEM CONTROL BLOCK POINTER
        AH = 02h
Return: AX = 0000h
        ES:BX -> System Control Block in V86 mode (see #04004)
        ES:EBX -> System Control Block in native mode (see #04004)
Note:   superseded by AH=26h
SeeAlso: AH=04h,AH=10h,AH=26h,AH=28h,AH=29h,AH=2Ah,INT 21/AX=3000h,INT 38

Format of PC-MOS/386 System Control Block:
Offset  Size    Description     (Table 04004)
 00h    WORD    pointer to first TCB in chain
 02h 17 BYTEs   reserved
 13h    WORD    pointer to current task's TCB
 15h    WORD    pointer to TCB of visible (console) task
--------O-D403-------------------------------
INT D4 - PC-MOS/386 v5.01 - GET/SET EXTENDED DIRECTORY INFORMATION
        AH = 03h
        AL = subfunction (00h get, 01h set)
        DS:(E)DX -> pathname
        ES:(E)BX -> 10-byte buffer for directory information (see #04005)
Return: CF clear if successful
            AL = permitted access level for file (00h-03h)
            ES:(E)BX -> modified buffer (AL=01h on entry)
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
Notes:  BX/DX are used in V86 mode, EBX/EDX in native mode
        the file class cannot be changed for files because it affects the
          encryption method, but directories can have their classes changed

Format of PC-MOS/386 directory information:
Offset  Size    Description     (Table 04005)
 00h    BYTE    reserved (0)
 01h    BYTE    file class ('A'-'Z' or 00h)
 02h    DWORD   user ID of file creator
 06h    WORD    file creation time (see #01665 at INT 21/AX=5700h)
 08h    WORD    file creation date (see #01666 at INT 21/AX=5700h)
--------O-D404-------------------------------
INT D4 - PC-MOS/386 v3.0+ - GET TASK CONTROL BLOCK
        AH = 04h
        BX = task ID or FFFFh for calling task
Return: CF clear if successful
            ES = segment of Task Control Block (TCB) (see #04006)
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
Note:   superseded by AH=27h
SeeAlso: AH=02h,AH=27h,AH=28h,AH=29h,AH=2Ah,INT 38

Format of PC-MOS/386 Task Control Block:
Offset  Size    Description     (Table 04006)
 00h    BYTE    signature byte "H" if allocated from system memory pool
 01h    BYTE    header block ID, "T" = TCB
 02h    WORD    length of block in paragraphs
 04h    WORD    segment address of next header block (0000h if last)
 06h    WORD    segment address of previous header block (0000h if first)
 08h    WORD    pointer to next TCB
 0Ah    WORD    pointer to previous TCB
 0Ch    WORD    pointer to associated TCB (if applicable)
 0Eh    WORD    reserved
---TCB---
 10h    WORD    TCB task ID
 12h    WORD    native context save area
 14h    WORD    start address of task
 16h    WORD    end address of task
 18h    BYTE    task priority
 19h    BYTE    task time slice
 1Ah    BYTE    "TCBWAIT" run status of task
 1Bh    BYTE    "TCBSTAT" what the task is waiting for
 1Ch    DWORD   address of polling routine
 20h    BYTE    error code from last function call
 21h 11 BYTEs   name of currently executing task
 2Ch  4 BYTEs   ???
 30h    BYTE    keyboard disabled if bit 1 set
 31h    BYTE    current shift state and toggles
 32h  2 BYTEs   ???
 34h    BYTE    current video mode
 35h    BYTE    current video page
 36h    BYTE    number of text columns per screen
 37h    BYTE    number of text rows per screen
 38h    WORD    length of video buffer
 3Ah    WORD    video page length
 3Ch    WORD    apge start address in video RAM
 3Eh  4 WORDs   current cursor positions for four screen pages
 46h  8 BYTEs   ???
 4Eh    WORD    current cursor type
 50h    BYTE    current palette setting
 51h    BYTE    original video mode
 52h    BYTE    start CRT row (00h or 01h)
 53h    BYTE    video RAM in task active
 54h    WORD    handle of video save area
 56h    WORD    page count of video save area
 58h    WORD    segment address of video save area
 5Ah    WORD    poitner to first Task File Block (see #04009)
 5Ch    WORD    pointer to first Current Directory Block (see #04012)
 5Eh    WORD    pointer to active Current Directory Block (see #04012)
 60h    BYTE    number of drives
 61h    BYTE    current drive (0=A:, etc.)
 62h    DWORD   disk transfer address
 66h  4 BYTEs   ???
 6Ah    BYTE    verify flag (nonzero = on)
 6Bh    BYTE    break flag (nonzero = on)
 6Ch    WORD    share/lock retry count
 6Eh    WORD    ticks between share/lock retries
 70h    BYTE    remote printer flags (see #04007)
 71h    BYTE    ETX/ACK delay count
 72h    WORD    spooler segment address
 74h  2 BYTEs   ???
 76h  3 BYTEs   remote printer redirection for LPT1 through LPT3 (see #04008)
 79h  2 BYTEs   ???
 7Bh    DWORD   offset of username in TCB
 7Fh    BYTE    current output class
 80h  7 BYTEs   protection access rights, 2 bits per class (writeable!)
 87h 122 BYTEs  ???
101h    BYTE    TCB sleep downcounter value
102h 20 BYTEs   ???
116h    BYTE    last scan code
        ...
5D0h    DWORD   far pointer to Device Driver Terminal's entry point
5D4h    WORD    offset of logical screen
5D6h    WORD    segment of logical screen
5D8h    WORD    cursor offset within page
5DAh    BYTE    screen columns
5DBh    WORD    async port number (0000h = none)
5DDh    DWORD   physical baudrate
5E1h 19 BYTEs   reserved for Device Driver Terminal (DDT)
        ...
7A6h    DWORD   far pointer to unregister calling chain

Bitfields for PC-MOS/386 remote printer flags:
Bit(s)  Description     (Table 04007)
 0      LPT1 to terminal
 1      LPT2 to terminal
 2      LPT3 to terminal
 3      escape to printer pending
 4      use XON/XOFF
 5      use ETX/ACK
 6      waiting for ACK or XON
 7      transparent printing on

(Table 04008)
Values for PC-MOS/386 remote printer redirection:
 00h    not redirected
 01h    redirected to COM1
 ...
 18h    redirected to COM24
 51h    redirected to LPT1
 52h    redirected to LPT2
 53h    redirected to LPT3

Format of PC-MOS/386 Task File Block:
Offset  Size    Description     (Table 04009)
 00h    BYTE    signature byte "H" if allocated from system memory pool
 01h    BYTE    header block ID, "F" = task file block
 02h    WORD    length of block in paragraphs
 04h    WORD    segment address of next header block (0000h if last)
 06h    WORD    segment address of previous header block (0000h if first)
 08h    WORD    pointer to next TCB
 0Ah    WORD    pointer to previous TCB
 0Ch    WORD    pointer to associated TCB (if applicable)
 0Eh    WORD    reserved
---TFB---
 10h    WORD    segment address of next TFB
 12h    WORD    segment address of previous TFB
 14h    WORD    segment address of TFB's Global File Block (see #04011)
 16h    WORD    segment address of owner's PSP
 18h    WORD    file handle
 1Ah  3 BYTEs   ???
 1Dh    DWORD   file position
 21h  4 BYTEs   ???
 25h    BYTE    IOCTL flags (see #04010)
 26h  2 BYTEs   ???

Bitfields for PC-MOS/386 IOCTL flags:
Bit(s)  Description     (Table 04010)
 0      stdin
 1      stdout
 2      null device
 3      clock device
 4      reserved
 5      ASCII mode instead of binary
 6      EOF encountered on input
 7      device rather than file

Format of PC-MOS/386 Global File Block:
Offset  Size    Description     (Table 04011)
 00h    BYTE    signature byte "H" if allocated from system memory pool
 01h    BYTE    header block ID, "G" = global file block
 02h    WORD    length of block in paragraphs
 04h    WORD    segment address of next header block (0000h if last)
 06h    WORD    segment address of previous header block (0000h if first)
 08h    WORD    pointer to next TCB
 0Ah    WORD    pointer to previous TCB
 0Ch    WORD    pointer to associated TCB (if applicable)
 0Eh    WORD    reserved
---GFB---
 10h 10 BYTEs   ???
 1Ah    WORD    file attribute
 1Ch    BYTE    ???
 1Dh    DWORD   address of device driver
 21h    WORD    first cluster
 23h    WORD    time of last modification
 25h    WORD    date of last modification
 27h    DWORD   size of file in bytes
 2Bh 11 BYTEs   ???
 36h 11 BYTEs   device name or FCB-format filename
 41h    WORD    segment address of TFB list
 43h    WORD    segment address of first RLB (see #04014) (0000h = none)
 45h    BYTE    flag: nonzero if GFB refers to character device
 46h    WORD    address of Block Device Block (see #04013)
 48h    WORD    sector of file's directory entry (see #01352)
 4Ah    WORD    high word of file's directory entry
 4Ch    WORD    ofsset of directory entry within sector

Format of PC-MOS/386 Current Directory Block:
Offset  Size    Description     (Table 04012)
 00h    BYTE    signature byte "H" if allocated from system memory pool
 01h    BYTE    header block ID, "C" = current directory block
 02h    WORD    length of block in paragraphs
 04h    WORD    segment address of next header block (0000h if last)
 06h    WORD    segment address of previous header block (0000h if first)
 08h    WORD    pointer to next TCB
 0Ah    WORD    pointer to previous TCB
 0Ch    WORD    pointer to associated TCB (if applicable)
 0Eh    WORD    reserved
---CDB---
 10h    BYTE    drive number
 11h    BYTE    ???
 12h 64 BYTEs   directory name
 52h    WORD    first directory cluster (0000h = root)

Format of PC-MOS/386 Block Device Block:
Offset  Size    Description     (Table 04013)
 00h    BYTE    signature byte "H" if allocated from system memory pool
 01h    BYTE    header block ID, "B" = block device block
 02h    WORD    length of block in paragraphs
 04h    WORD    segment address of next header block (0000h if last)
 06h    WORD    segment address of previous header block (0000h if first)
 08h    WORD    pointer to next TCB
 0Ah    WORD    pointer to previous TCB
 0Ch    WORD    pointer to associated TCB (if applicable)
 0Eh    WORD    reserved
---BDB---
 10h    BYTE    logical drive
 11h    BYTE    unit passed to driver
 12h    WORD    sector size
 14h    BYTE    cluster mask
 15h    BYTE    cluster shift count
 16h    WORD    starting sector of first FAT
 18h    BYTE    number of FATs
 19h    WORD    number of root directories
 1Bh    WORD    sector number of first data sector (cluster 0002h)
 1Dh    WORD    number of clusters + 1 (number of highest data cluster)
 1Fh    BYTE    number of sectors in FAT
 20h    WORD    beginning root directory sector number
 22h    DWORD   device driver address
 26h    BYTE    media descriptor byte
 27h  5 BYTEs   ???
 2Ch    BYTE    flag: volume > 32MB
 2Dh    BYTE    ???
 2Eh    BYTE    number of sectors per cluster
 2Fh    WORD    number of clusters on device
 31h    WORD    number of free clusters (FFFFh = unknown)
 33h    WORD    root directory cluster number
 35h    WORD    pointer to alias/subst string
 37h    WORD    TCB segment address of owner (0000h = none)

Format of PC-MOS/386 Record Lock Block:
Offset  Size    Description     (Table 04014)
 00h    BYTE    signature byte "H" if allocated from system memory pool
 01h    BYTE    header block ID, "R" = record lock block
 02h    WORD    length of block in paragraphs
 04h    WORD    segment address of next header block (0000h if last)
 06h    WORD    segment address of previous header block (0000h if first)
 08h    WORD    pointer to next TCB
 0Ah    WORD    pointer to previous TCB
 0Ch    WORD    pointer to associated TCB (if applicable)
 0Eh    WORD    reserved
---RLB---
 10h    WORD    segment address of owner's PSP
 12h    WORD    segment address of Global File Block (see #04011)
 14h    WORD    segment address of owner's Task File Block (see #04009)
 16h    DWORD   file offset of locked region start
 1Ah    DWORD   length of locked region
 1Eh    WORD    owner's handle for file
--------O-D407-------------------------------
INT D4 - PC-MOS/386 v3.0+ - WAIT FOR EVENT
        AH = 07h
        AL = events to monitor (see #04015)
        BX = number of timer ticks until timeout if AL bit 1 set
        CX = bitmap of IRQs to monitor if AL bit 2 set
                (bit 0 = IRQ0 .. bit 15 = IRQ15)
        DX = port to monitor if AL bit 3 set
Return: CF clear if successful
            AL = type of event which woke up task (see #04015)
            CX = IRQ (if any) which awakened task
            DX = port (if any) which awakened task
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
Note:   a device driver may make this call with AL=00h, which indicates that
          the driver is responsible for setting and clearing the TCBWAIT field
          in the TCB.  To put task to sleep, set TCBWAIT bits 2-0 to 001; to
          reawaken it, set bit 1 (leaving other bits unchanged)
SeeAlso: AH=04h,INT 16/AH=00h,INT 38

Bitfields for PC-MOS/386 events to monitor:
Bit(s)  Description     (Table 04015)
 0      keystroke
 1      timeout
 2      IRQ
 3      port access
 7      return status of user poll routine (other ignored if set)
--------O-D410-------------------------------
INT D4 - PC-MOS/386 v3.0+ - ENTER/LEAVE NATIVE 386 EXECUTION MODE
        AH = 10h
        AL = direction (00h return to V86 mode, 01h enter native mode)
        CX = length in bytes of Native Context Area ( >=1024 )
        DX = segment of Native Context Area
Return: CF clear if successful
            running in desired mode at instruction following INT D4 call
            all segment registers converted to appropriate selectors/segments
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
Note:   MS-DOS calls are available in protected mode
SeeAlso: AH=11h,AH=12h,AH=13h,INT 2F/AX=1687h,INT 67/AX=DE0Ch,INT 38
--------O-D411-------------------------------
INT D4 - PC-MOS/386 v3.0+ - ALLOCATE NATIVE MODE MEMORY BLOCK
        AH = 11h
        EBX = block length in bytes
Return: CF clear if successful
            EBX = number of bytes actually allocated
            ES = selector for allocated block
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
Program: PC-MOS/386 is a multitasking/multiuser MS-DOS-compatible operating
          system by The Software Link, Inc.
Note:   the memory must be released before the program terminates
SeeAlso: AH=10h,AH=12h,INT 38
--------O-D412-------------------------------
INT D4 - PC-MOS/386 v3.0+ - FREE NATIVE MODE MEMORY BLOCK
        AH = 12h
        ES = selector for block to free
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
SeeAlso: AH=10h,AH=11h,AH=13h,INT 38
--------O-D413-------------------------------
INT D4 - PC-MOS/386 v5.01 - GET ALIAS FOR SELECTOR (NATIVE MODE ONLY)
        AH = 13h
        AL = type of alias selector (00h data, 01h stack, 02h code)
        BX = selector
Return: CF clear if successful
            AX = new selector or 0000h if BX selector not found
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
SeeAlso: AH=11h,AH=12h
--------O-D416-------------------------------
INT D4 - PC-MOS/386 v5.01 - SET/CLEAR IRQ RESERVATION
        AH = 16h
        AL = function (00h clear, 01h set reservation)
        CX = IRQ number
Return: AX = status
            (0000h successful, 0001h currently reserved by another task)
SeeAlso: AH=07h,INT 14/AH=11h"PC-MOS"
--------O-D419-------------------------------
INT D4 - PC-MOS/386 v5.01 - GET TASK ID
        AH = 19h
Return: BX = caller's task ID
Program: PC-MOS/386 is a multitasking/multiuser MS-DOS-compatible operating
          system by The Software Link, Inc.
SeeAlso: AH=1Dh,AH=1Eh
--------O-D41A-------------------------------
INT D4 - PC-MOS/386 v5.01 - GET/SET TASK PRIORITY
        AH = 1Ah
        AL = subfunction (00h read, 01h set, 02h get and set)
        BX = task ID (FFFFh for current task)
        CL = new priority value
Return: CF clear if successful
            CL = current priority value
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
SeeAlso: AH=1Bh,AH=1Ch
--------O-D41B-------------------------------
INT D4 - PC-MOS/386 v5.01 - GET/SET TIME SLICE
        AH = 1Bh
        AL = subfunction (00h read, 01h set, 02h get and set)
        BX = task ID (FFFFh for current task) (see AH=19h)
        CL = new time slice value
Return: CF clear if successful
            CL = current time slice value
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
SeeAlso: AH=1Ah,AH=1Ch
--------O-D41C-------------------------------
INT D4 - PC-MOS/386 v5.01 - GET/SET KEYBOARD MODE
        AH = 1Ch
        AL = subfunction (00h enable, 01h disable, 02h get mode)
        BX = task ID (FFFFh for current task)
Return: CF clear if successful
            CL = current keyboard state
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
Program: PC-MOS/386 is a multitasking/multiuser MS-DOS-compatible operating
          system by The Software Link, Inc.
SeeAlso: AH=1Ah,AH=1Bh
--------O-D41D-------------------------------
INT D4 - PC-MOS/386 v5.01 - GET CURRENT PROGRAM NAME
        AH = 1Dh
        BX = task ID (FFFFh for current task) (see AH=19h)
        ES:DI -> buffer for program name (see #04016)
Return: CF clear if successful
            ES:DI buffer filled
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
SeeAlso: AH=19h,AH=1Eh

Format of PC-MOS/386 program name buffer:
Offset  Size    Description     (Table 04016)
 00h  8 BYTEs   filename
 08h  3 BYTEs   extension
--------O-D41E-------------------------------
INT D4 - PC-MOS/386 v5.01 - GET CURRENT USERNAME AND SECURITY CLASS
        AH = 1Eh
        BX = task ID (FFFFh for current task)
        ES:DI -> 4-byte buffer for username
Return: CF clear if successful
            CL = security class
                20h (' ') none
                41h-5Ah ('A'-'Z') security level
            ES:DI buffer filled
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
SeeAlso: AH=19h,AH=1Dh
--------O-D41F-------------------------------
INT D4 - PC-MOS/386 v5.01 - GET TASK PARTITION INFORMATION
        AH = 1Fh
        BX = task ID (FFFFh for current task) (see AH=19h)
Return: CF clear if successful
            CX = start segment of task
            DX = ending segment of task
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
Program: PC-MOS/386 is a multitasking/multiuser MS-DOS-compatible operating
          system by The Software Link, Inc.
SeeAlso: AH=2Dh
--------O-D420-------------------------------
INT D4 - PC-MOS/386 v5.01 - GET PORT AND BAUDRATE INFORMATION
        AH = 20h
        BX = task ID (FFFFh for current task) (see AH=19h)
Return: CF clear if successful
            CX = port number (0000h if none)
            DI:SI = baudrate (if CX nonzero)
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
SeeAlso: INT 14/AH=0Ch"FOSSIL"
--------O-D421-------------------------------
INT D4 - PC-MOS/386 v5.01 - REMOVE A TASK
        AH = 21h
        BX = task ID (FFFFh for current task) (see AH=19h)
Return: CF clear if successful
            AX = ASCII percentage of System Memory Pool used
                (AH = tens digit, AL = ones digit)
            DS,SI destroyed
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
Program: PC-MOS/386 is a multitasking/multiuser MS-DOS-compatible operating
          system by The Software Link, Inc.
SeeAlso: AH=22h
--------O-D422-------------------------------
INT D4 - PC-MOS/386 v5.01 - ADD A TASK TO THE SYSTEM
        AH = 22h
        DS:SI -> addtask data structure (see #04018)
Return: CF clear if successful
            ES = segment address of the new task's TCB data structure
        CF set on error
            AX = error code (see #04017)
SeeAlso: AH=21h

(Table 04017)
Values for PC-MOS/386 error code:
 08h    insufficient memory
 0Bh    invalid addtask structure format
 12h    insufficient available space in system memory pool
 1Fh    general failure
 55h    already allocated
 57h    if task already in use or invalid parameter

Format of PC-MOS/386 addtask data structure:
Offset  Size    Description     (Table 04018)
 00h    WORD    task size in KB (min 16KB)
 02h    WORD    task ID (0000h for automatic selection)
 04h    BYTE    task class (' ' or 'A'-'Z')
 05h    DWORD   -> ASCIZ name of task startup batchfile
 09h    DWORD   -> task's terminal driver (0000000h = background task)
 0Dh    WORD    task port
 0Fh    DWORD   task baud rate
 13h    DWORD   (ret) total extended memory
 17h    DWORD   (ret) number of 4K extended memory pages allocated
 1Bh    WORD    (ret) paragraphs of system memory pool allocated
 1Dh    WORD    (ret) system memory pool size in paragraphs
 1Fh    WORD    (ret) ASCII task percentage of system memory pool
 21h  3 BYTEs   reserved
--------O-D423-------------------------------
INT D4 - PC-MOS/386 v5.01 - CHANGE TERMINAL DRIVER
        AH = 23h
        BX = task ID (FFFFh for current task)
        DS:SI -> entry point of the new Device Driver Terminal
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
--------O-D424-------------------------------
INT D4 U - PC-MOS/386 v5.01 - GET OPERATING SYSTEM SERIAL NUMBER
        AH = 24h
Return: DS:DX -> '$'-terminated string containing the serial number
--------O-D425-------------------------------
INT D4 - PC-MOS/386 v5.01 - IDENTIFY LOAD ADDRESS OF DEVICE DRIVER LOCATION
        AH = 25h
        DX = driver's CS value
Return: AX = segment address of driver in system memory pool
            (0000h if the driver is not within the system memory pool)
Program: PC-MOS/386 is a multitasking/multiuser MS-DOS-compatible operating
          system by The Software Link, Inc.
--------O-D426-------------------------------
INT D4 - PC-MOS/386 v5.01 - GET SYSTEM CONTROL BLOCK SEGMENT/SELECTOR
        AH = 26h
Return: DX = segment/selector of the System Control Block (see #04004)
Note:   this function supersedes AH=02h
SeeAlso: AH=02h,AH=27h,AH=28h,AH=29h,AH=2Ah
--------O-D427-------------------------------
INT D4 - PC-MOS/386 v5.01 - GET TASK CONTROL BLOCK SEGMENT/SELECTOR
        AH = 27h
        BX = task ID (FFFFh if current task) (see AH=19h)
Return: CF clear if successful
            DX = segment/selector for the Task Control Block (see #04006)
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
Note:   this function supersedes AH=04h
SeeAlso: AH=26h,AH=28h,AH=29h,AH=2Ah
--------O-D428-------------------------------
INT D4 - PC-MOS/386 v5.01 - GET CONTROL BLOCK DATA FROM SCB OR TCB
        AH = 28h
        BX = offset into control block at which to start reading
        CX = number of bytes to read
        DX = segment/selector of control block obtained via AH=26h or AH=27h
        ES:DI -> buffer for data
Return: CF clear if successful
        CF set on error
            AX = error code (see also #01680 at INT 21/AH=59h/BX=0000h)
                05h access denied due to an invalid segment/selector
SeeAlso: AH=26h,AH=27h,AH=29h,AH=2Ah
--------O-D429-------------------------------
INT D4 - PC-MOS/386 v5.01 - WRITE CONTROL BLOCK DATA INTO SCB OR TCB
        AH = 29h
        BX = offset into control block at which to start writing
        CX = number of bytes to write
        DX = segment/selector of control block obtained via AH=26h or AH=27h
        DS:SI -> buffer containing data to be written
Return: CF clear if successful
        CF set on errro
            AX = error code (see also #01680 at INT 21/AH=59h/BX=0000h)
                05h access denied due to an invalid segment/selector
Note:    this function performs no bounds checking
Program: PC-MOS/386 is a multitasking/multiuser MS-DOS-compatible operating
          system by The Software Link, Inc.
SeeAlso: AH=26h,AH=27h,AH=28h,AH=2Ah
--------O-D42A-------------------------------
INT D4 - PC-MOS/386 v5.01 - SWAP CONTROL BLOCK DATA OF SCB OR TCB
        AH = 2Ah
        BX = offset into control block at which to start swap
        CX = number of bytes to swap
        DX = segment/selector of control block obtained via AH=26h or AH=27h
        DS:SI -> buffer containing new data and to receive current data
Return: CF clear if successful
        CF set on error
            AX = error code (see also #01680 at INT 21/AH=59h/BX=0000h)
                05h access denied due to an invalid segment/selector
Note:   the interrupts are disabled during the swap to prevent corruption
SeeAlso: AH=26h,AH=27h,AH=28h,AH=29h
--------O-D42C-------------------------------
INT D4 - PC-MOS/386 v5.01 - GET/SET SPOOLER PARAMETERS
        AH = 2Ch
        AL = function
            00h set spooler timeout
                CX = timout value in seconds
            01h get spooler timeout
                Return: CX = current timeout in seconds
            02h get spooler parameters
                Return: CH = priority (00h-09h)
                        CL = disposition (d, h, i, n, s)
                        SI = class (a - z)
            03h set spooler parameters
                CH = priority (00h-09h)
                CL = disposition (d, h, i, n, s)
                SI = class (a - z)
                BX = task ID (FFFFh for current task)
                DX = LPT number
Return: CF clear if successful
        CF set on error
            AX = error code (see #01680 at INT 21/AH=59h/BX=0000h)
SeeAlso: AH=00h,AH=02h,AH=03h
--------O-D42D-------------------------------
INT D4 - PC-MOS/386 v5.01 - GET MAXIMUM TASK SIZE
        AH = 2Dh
Return: DX = maximum task size in paragraphs
        BX = start address of task space
Program: PC-MOS/386 is a multitasking/multiuser MS-DOS-compatible operating
          system by The Software Link, Inc.
SeeAlso: AH=1Fh,AH=22h
--------r-D5---------------------------------
INT D5 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT D4"BASIC",INT D6"BASIC"
--------r-D5---------------------------------
INT D5 - STSC APL*PLUS/PC - MAY BE USED IN FUTURE RELEASES
--------r-D6---------------------------------
INT D6 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT D5"BASIC",INT D7"BASIC"
--------r-D6---------------------------------
INT D6 - STSC APL*PLUS/PC - MAY BE USED IN FUTURE RELEASES
--------r-D7---------------------------------
INT D7 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT D6"BASIC",INT D8"BASIC"
--------r-D7---------------------------------
INT D7 - STSC APL*PLUS/PC - MAY BE USED IN FUTURE RELEASES
--------r-D8---------------------------------
INT D8 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT D7"BASIC",INT D9"BASIC"
--------r-D8---------------------------------
INT D8 - STSC APL*PLUS/PC - MAY BE USED IN FUTURE RELEASES
--------H-D8---------------------------------
INT D8 - Screen Thief v1.00 - RELOCATED IRQ0
Range:  INT 78h to INT E0h, selected by commandline switch
Note:   Screen Thief relocates IRQs 0 through 7 to INT D8 to INT DF by default,
          but may be directed via a commandline switch to use any range
          starting at a multiple of 8 between 78h and E0h
SeeAlso: INT 08"IRQ0",INT 2D/AL=10h"Screen Thief",INT 50"DESQview"
SeeAlso: INT D9"Screen Thief"
--------r-D9---------------------------------
INT D9 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT D8"BASIC",INT DA"BASIC"
--------r-D9---------------------------------
INT D9 - STSC APL*PLUS/PC - MAY BE USED IN FUTURE RELEASES
--------H-D9---------------------------------
INT D9 - Screen Thief v1.00 - RELOCATED IRQ1
Range:  INT 79h to INT E1h, selected by commandline switch
Note:   (see INT D8"Screen Thief")
SeeAlso: INT 09"IRQ1",INT D8"Screen Thief",INT DA"Screen Thief"
--------r-DA---------------------------------
INT DA - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT D9"BASIC",INT DB"BASIC"
--------r-DA---------------------------------
INT DA - STSC APL*PLUS/PC - MAY BE USED IN FUTURE RELEASES
--------H-DA---------------------------------
INT DA - Screen Thief v1.00 - RELOCATED IRQ2
Range:  INT 7Ah to INT E2h, selected by commandline switch
Note:   (see INT D8"Screen Thief")
SeeAlso: INT 0A"IRQ2",INT D9"Screen Thief",INT DB"Screen Thief"
--------r-DB---------------------------------
INT DB - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT DA"BASIC",INT DC"BASIC"
--------r-DB---------------------------------
INT DB - STSC APL*PLUS/PC - MAY BE USED IN FUTURE RELEASES
--------H-DB---------------------------------
INT DB - Screen Thief v1.00 - RELOCATED IRQ3
Range:  INT 7Bh to INT E3h, selected by commandline switch
Note:   (see INT D8"Screen Thief")
SeeAlso: INT 0B"IRQ3",INT DA"Screen Thief",INT DC"Screen Thief"
--------u-DC---------------------------------
INT DC - PC/370 v4.1- - API
SeeAlso: INT 60"PC/370"
--------r-DC---------------------------------
INT DC - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT DB"BASIC",INT DD"BASIC"
--------r-DC---------------------------------
INT DC - STSC APL*PLUS/PC - MAY BE USED IN FUTURE RELEASES
--------H-DC---------------------------------
INT DC - Screen Thief v1.00 - RELOCATED IRQ4
Range:  INT 7Ch to INT E4h, selected by commandline switch
Note:   (see INT D8"Screen Thief")
SeeAlso: INT 0C"IRQ4",INT DB"Screen Thief",INT DD"Screen Thief"
--------r-DD---------------------------------
INT DD - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT DC"BASIC",INT DE"BASIC"
--------r-DD---------------------------------
INT DD - STSC APL*PLUS/PC v9.0 - PLACE KEYSTROKE EVENTS IN INPUT BUFFER
        BX = where to place keystrokes
            FFFFh insert before current buffer contents
            0000h replace current contents
            0001h insert after current contents
        CX = number of keystroke events to insert
        ES:SI -> data to be placed into buffer (list of WORD key codes)
            4000h + N = normal ASCII keystroke N (N = 00h to FFh)
            4100h + N = extended ASCII keystroke N (N = 03h to 84h)
Return: nothing
SeeAlso: INT 16/AH=05h
--------H-DD---------------------------------
INT DD - Screen Thief v1.00 - RELOCATED IRQ5
Range:  INT 7Dh to INT E5h, selected by commandline switch
Note:   (see INT D8"Screen Thief")
SeeAlso: INT 0D"IRQ5",INT DC"Screen Thief",INT DE"Screen Thief"
--------r-DE---------------------------------
INT DE - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT DD"BASIC",INT DF"BASIC"
--------r-DE---------------------------------
INT DE - APL*PLUS/PC - ???
Note:   appears to be the same as INT 16
--------H-DE---------------------------------
INT DE - Screen Thief v1.00 - RELOCATED IRQ6
Range:  INT 7Eh to INT E6h, selected by commandline switch
Note:   (see INT D8"Screen Thief")
SeeAlso: INT 0E"IRQ6",INT DD"Screen Thief",INT DF"Screen Thief"
--------b-DF---------------------------------
INT DF - Victor 9000/Sirius 1 - SuperBIOS
SeeAlso: INT 21/AH=EAh"NetWare"
--------r-DF---------------------------------
INT DF - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT DE"BASIC",INT E0"BASIC"
--------r-DF---------------------------------
INT DF - APL*PLUS/PC - SAME AS INT 10
SeeAlso: INT 10/AH=00h,INT 10/AH=0Eh
--------H-DF---------------------------------
INT DF - Screen Thief v1.00 - RELOCATED IRQ7
Range:  INT 7Fh to INT E7h, selected by commandline switch
Note:   (see INT D8"Screen Thief")
SeeAlso: INT 0F"IRQ7",INT DE"Screen Thief"
--------r-E0---------------------------------
INT E0 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT 80"BASIC",INT DF"BASIC",INT E1"BASIC"
--------r-E0---------------------------------
INT E0 - APL*PLUS/PC - RESTIME HIGH-RESOLUTION TIMER FOR QUAD MF FUNCTION
SeeAlso: INT CF"APL"
--------v-E0---------------------------------
INT E0 - VIRUS - "Micro-128" - ???
Note:   Micro-128 also overwrites the upper half of the interrupt table
SeeAlso: INT 9E"VIRUS",INT F1"VIRUS"
----------E0---------------------------------
INT E0 - DeskMate (Tandy) - DESK EXECUTIVE API
        AX = function code (numerous)
        parameters passed in BX, DX, ES, DI, and/or BP
Return: AX = return from function
Program: DeskMate is a proprietary GUI from Tandy distributed with several
          models of the Tandy 1000's, 2500's, 3000's, and laptops.  Retail
          and runtime versions also exist.  Some Tandy's are designed to
          boot directly into DeskMate.
SeeAlso: INT 15/AX=7002h,INT E1"DeskMate"
--------O-E0---------------------------------
INT E0 - CP/M-86, Concurrent CP/M, DR Multiuser DOS - FUNCTION CALLS
        CL = function number (see #04019,#04020)
        DS,DX contain parameter(s):
                DL = byte parameter
                DX = word parameter
                DS:DX -> structure
Return: as appropriate for function:
                AL = byte result
                AX = word
                ES:AX -> structure (and BX=ES)
        CX is often the error code (see #04021)
Notes:  several functions are covered in more detail in following entries
        most of these calls are also supported by Digital Research's DOS Plus
          v2.1; the unsupported functions are 26h,29h-2Bh,3Ah,3Dh-62h,71h-8Ch,
          90h-92h,94h-97h,9Bh-ABh, and AEh-FFh
SeeAlso: INT 21/AX=4459h,INT 21/AH=E0h"DOS Plus",INT E6"CP/M-86"

(Table 04019)
Values for CP/M-86,DR Multiuser DOS function number:
 00h    terminate calling process                       (see INT E0/CL=00h)
 01h    read a character                                (see INT E0/CL=01h)
 02h    write character to default console              (see INT E0/CL=02h)
 03h    read character from default AUX                 (see INT E0/CL=03h)
 04h    write character to default AUX                  (see INT E0/CL=04h)
 05h    write character to default list device          (see INT E0/CL=05h)
 06h    perform raw I/O on default console              (see INT E0/CL=06h)
 07h    return default AUX input status                 (see INT E0/CL=07h)
 08h    return default AUX output status                (see INT E0/CL=08h)
 09h    write string to default console                 (see INT E0/CL=09h)
 0Ah    read string from default console                (see INT E0/CL=0Ah)
 0Bh    return default console input status             (see INT E0/CL=0Bh)
 0Ch    get BDOS release ID                             (see INT E0/CL=0Ch)
 0Dh    reset all disk drives           (see also INT 21/AH=0Dh)
 0Eh    set default drive               (see also INT 21/AH=0Eh"DOS 1+")
 0Fh    open file via FCB               (see also INT 21/AH=0Fh,#01345)
 10h    close file via FCB              (see also INT 21/AH=10h)
 11h    search for first matching file with FCB (see also INT 21/AH=11h)
 12h    search for next matching file with FCB (see also INT 21/AH=12h)
 13h    delete file via FCB             (see also INT 21/AH=13h)
 14h    sequential read via FCB         (see also INT 21/AH=14h)
 15h    sequential write via FCB        (see also INT 21/AH=15h)
 16h    create file via FCB             (see also INT 21/AH=16h)
 17h    rename file via FCB             (see also INT 21/AH=17h)
 18h    get bit map of logged drives
 19h    get default drive               (see also INT 21/AH=19h)
 1Ah    set DMA address offset
 1Bh    get default disk allocation vector (see also INT 21/AH=1Bh)
 1Ch    set default drive to read-only
 1Dh    get bit map of read-only drives
 1Eh    set file attributes via FCB     (see also INT 21/AX=4301h)
 1Fh    get address of disk parameter block (see also INT 21/AH=1Fh)
 20h    get/set default user number
 21h    read random record via FCB      (see also INT 21/AH=21h)
 22h    write random record via FCB     (see also INT 21/AH=22h)
 23h    compute file size with FCB      (see also INT 21/AH=23h)
 24h    get FCB random record number    (see also INT 21/AH=24h)
 25h    reset specified drives
 26h    access specified drives (not in DR DOS Plus v2.1)
 27h    free specified drives
 28h    write random with FCB, zero fill (see also INT 21/AH=28h)
 2Ah    lock records in FCB file        (see also INT 21/AH=5Ch)
 2Bh    unlock records in FCB file      (see also INT 21/AH=5Ch)
 2Ch    set BDOS multisector count
 2Dh    set BDOS error mode
 2Eh    get free space on disk
 2Fh    load, initialize, and jump to process ("chain process")
        (see INT E0/CL=2Fh,INT 21/AH=4Bh)
 30h    flush write-deferred buffers
 31h    get/set system variable (DOS Plus v2.1)
 32h    call BIOS (XIOS) character routine (see #04020)
 33h    set DMA address segment
 34h    get DMA buffer address
 35h    CP/M-86 allocate maximum memory                 (see INT E0/CL=35h)
 36h    allocate maximum memory at specified segment    (see INT E0/CL=36h)
 37h    CP/M-86 allocate memory segment (see INT E0/CL=37h,INT 21/AH=48h)
 38h    allocate memory at specified segment            (see INT E0/CL=38h)
 39h    CP/M-86 free specified memory segment (see INT E0/CL=39h,INT 21/AH=49h)
 3Ah    CP/M-86 free all memory (not in DOS Plus v2.1)  (see INT E0/CL=3Ah)
 3Bh    load .CMD file into memory                      (see INT E0/CL=3Bh)
 3Ch    (DOS Plus v2.1) call RSX program
 40h    (DR-NET, REAL/32) log on a server               (see INT E0/CL=40h)
 41h    (DR-NET, REAL/32) log off a server              (see INT E0/CL=41h)
 42h    (DR-NET) send a message
 43h    (DR-NET) receive a message
 44h    (DR-NET, REAL/32) get network status            (see INT E0/CL=44h)
 45h    (DR-NET, REAL/32) get requestor config table    (see INT E0/CL=45h)
 46h    (DR-NET) set compatibility attributes
 47h    (DR-NET, REAL/32) get server configuration table (see INT E0/CL=47h)
 48h    (DR-NET, REAL/32) set network error mode        (see INT E0/CL=48h)
 49h    (DR-NET, REAL/32) attach network
 4Ah    (DR-NET, REAL/32) detach network
 4Bh    (DR-NET, REAL/32) set default password
 4Ch    (DR-NET, REAL/32) get-set long timeout
 4Dh    (DR-NET, REAL/32) get parameter table
 4Fh    (REAL/32) get extended network error
 50h    (DR-NET, REAL/32) get network information
 53h    get current time                        (see also INT 21/AH=2Ch)
 54h    set current time                        (see also INT 21/AH=2Dh)
 55h    get binary system date                  (see also INT 21/AH=2Ah)
 56h    set system date                         (see also INT 21/AH=2Bh"DATE")
 57h    allocate system flag
 58h    deallocate system flag
 59h    reserve memory in global area                   (see INT E0/CL=59h)
 5Ah    lock physical drive
 5Bh    unlock physical drive
 5Ch    search path for executable file                 (see INT E0/CL=5Ch)
 5Dh    load and execute command                        (see INT E0/CL=5Dh)
 5Eh    get/set process exit code                       (see INT E0/CL=5Eh)
 5Fh    set country information
 60h    get country information
 63h    truncate FCB file (see also INT 21/AH=28h)
 64h    create/update directory label
 65h    get directory label
 66h    get FCB date stamp and password mode
 67h    write extended FCB
 68h    set system date and time
 69h    get system date and time in binary
 6Ah    establish password for file access
 6Bh    get OS serial number                            (see INT E0/CL=6Bh)
 6Ch    (DOS Plus v2.1) get/set program return code
 6Dh    get/set console mode                            (see INT E0/CL=6Dh)
 6Eh    get/set string delimiter                        (see INT E0/CL=6Eh)
 6Fh    write block to default console                  (see INT E0/CL=6Fh)
 70h    write block to default list device              (see INT E0/CL=70h)
 71h    execute DOS-compatible function                 (see INT E0/CL=71h)
 74h    set FCB time and date stamps
 80h    allocate memory                                 (see INT E0/CL=80h)
 82h    deallocate memory                               (see INT E0/CL=81h)
 83h    poll I/O device
 84h    wait on system flag                             (see INT E0/CL=84h)
 85h    set system flag                                 (see INT E0/CL=85h)
 86h    create message queue                            (see INT E0/CL=86h)
 87h    open message queue                              (see INT E0/CL=87h)
 88h    delete message queue                            (see INT E0/CL=88h)
 89h    read from message queue                         (see INT E0/CL=89h)
 8Ah    conditionally read from message queue           (see INT E0/CL=8Ah)
 8Bh    write to message queue                          (see INT E0/CL=8Bh)
 8Ch    conditionally write to message queue            (see INT E0/CL=8Ch)
 8Dh    delay calling process                           (see INT E0/CL=8Dh)
 8Eh    call process dispatcher (yield CPU)             (see INT E0/CL=8Eh)
 8Fh    terminate calling process (same as func 00h)    (see INT E0/CL=8Fh)
 90h    create a process                                (see INT E0/CL=90h)
 91h    set calling process' priority                   (see INT E0/CL=91h)
 92h    attach to default console                       (see INT E0/CL=92h)
 93h    detach from default console                     (see INT E0/CL=93h)
 94h    (REAL/32) set the process' default console      (see INT E0/CL=94h)
 95h    assign default console to process               (see INT E0/CL=95h)
 96h    interpret and execute commandline               (see INT E0/CL=96h)
 97h    resident procedure library
 98h    parse ASCII string into FCB (see also INT 21/AH=29h)
 99h    return default console                          (see INT E0/CL=99h)
 9Ah    get address of system data (SYSDAT)             (see INT E0/CL=9Ah)
 9Bh    get system time and date
 9Ch    return calling process' descriptor              (see INT E0/CL=9Ch)
 9Dh    terminate process by name or PD address         (see INT E0/CL=9Dh)
 9Eh    attach to default list device                   (see INT E0/CL=9Eh)
 9Fh    detach from default list device                 (see INT E0/CL=9Fh)
 A0h    select default list device                      (see INT E0/CL=A0h)
 A1h    conditionally attach to default list device     (see INT E0/CL=A1h)
 A2h    conditionally attach to default console         (see INT E0/CL=A2h)
 A3h    get OS version number                           (see INT E0/CL=A3h)
 A4h    get default list device                         (see INT E0/CL=A4h)
 A5h    attach to default AUX                           (see INT E0/CL=A5h)
 A6h    detach from default AUX                         (see INT E0/CL=A6h)
 A7h    conditionally attach to default AUX             (see INT E0/CL=A7h)
 A8h    set default AUX                                 (see INT E0/CL=A8h)
 A9h    return default AUX                              (see INT E0/CL=A9h)
 ACh    read block from default AUX                     (see INT E0/CL=ACh)
 ADh    (DOS Plus v2.1) write block to default AUX      (see INT E0/CL=ADh)
 B0h    configure default AUX                           (see INT E0/CL=B0h)
 B1h    get/set device control parameters               (see INT E0/CL=B1h)
 B2h    send Break through default AUX                  (see INT E0/CL=B2h)
 B3h    allocate physical memory                        (see INT E0/CL=B3h)
 B4h    free physical memory                            (see INT E0/CL=B4h)
 B5h    map physical memory                             (see INT E0/CL=B5h)
 B6h    nondestructive conditional message queue read   (see INT E0/CL=B6h)
 B7h    timed wait on system flag                       (see INT E0/CL=B7h)
 B8h    get/set I/O port mapping                        (see INT E0/CL=B8h)
 B9h    set list device timeout                         (see INT E0/CL=B9h)
 BAh    set AUX timeout value                           (see INT E0/CL=BAh)
 BBh    execute XIOS service
 BDh    (DR Multiuser DOS) delay                        (see INT E0/CL=BDh)
 FFh    return 80386 to native mode
SeeAlso: #04020,#04021

(Table 04020)
Values for DOS Plus v2.1 XIOS functions:
 00h    terminate program
 01h    ???
 02h    check for console input status
 03h    read character from console
 04h    write character to console
 05h    write character to list device
 06h    write character to auxiliary device
 07h    read character from auxiliary device
 0Fh    get list device status
 10h-14h reserved
 15h    device initialization
 16h    check console output status
 17h-7Fh reserved
---BBC Acorn---
 80h    get XIOS version
 81h    get Tube semaphore
 82h    release Tube semaphore
 83h    select text/graphics
 84h    update B&W graphics rectangle
 85h    update color graphics rectangle
 86h    get/release/update mouse
 87h    get system error info
 88h    entry in CLOCK called by WatchDog RSP
 89h    BBC OSBYTE function
 8Ah    BBC OSWORD function
SeeAlso: #04019

(Table 04021)
Values for DR Multiuser DOS Error Return Code:
 00h    no error
 01h    system call not implemented
 02h    illegal system call number
 03h    cannot find memory
 04h    illegal flag number
 05h    flag overrun
 06h    flag underrun
 07h    no unused Queue Descriptors
 08h    no free queue buffer
 09h    cannot find queue
 0Ah    queue in use
 0Ch    no free Process Descriptors
 0Dh    no queue access
 0Eh    empty queue
 0Fh    full queue
 10h    CLI queue missing
 11h    no 8087 in system
 12h    no unused Memory Descriptors
 13h    illegal console number
 14h    no Process Descriptor match
 15h    no console match
 16h    no CLI process
 17h    illegal disk number
 18h    illegal filename
 19h    illegal filetype
 1Ah    character not ready
 1Bh    illegal Memory Descriptor
 1Ch    bad return from BDOS load
 1Dh    bad return from BDOS read
 1Eh    bad return from BDOS open
 1Fh    null command
 20h    not owner of resource
 21h    no CSEG in load file
 22h    process Descriptor exists on Thread Root
 23h    could not terminate process
 24h    cannot attach to process
 25h    illegal list device number
 26h    illegal password
 28h    external termination occurred
 29h    fixup error upon load
 2Ah    flag set ignored
 2Bh    illegal auxilliary device number
SeeAlso: #04019
--------O-E0----CL00-------------------------
INT E0 - REAL/32 - "P_TERMCPM" - TERMINATE CALLING PROCESS
        CL = 00h
Return: AX = error code
            FFFFh on failure
        may destroy SI,DI???
Program: REAL/32 is the descendant of IMS Multiuser DOS, which in turn is
          derived from DR Multiuser DOS and its predecessors (Concurrent DOS,
          etc.)
Note:   sets the exit code (ERRORLEVEL) to 00h
SeeAlso: INT 21/AH=00h
--------O-E0----CL01-------------------------
INT E0 - REAL/32 - "C_READ" - FETCH CHARACTER FROM THE DEFAULT CONSOLE
        CL = 01h
Return: AX = character
        may destroy SI,DI???
Notes:  this function echos the character to the screen, expanding Tab
          characters to the next multiple of eight columns; Ctrl-C is
          ignored if the calling process can not terminate
        the calling process is suspended until a character is available; if
          the caller does not own the console, it is suspended until it
          can attach to the console
SeeAlso: INT E0/CL=02h,INT E0/CL=06h,INT 21/AH=01h
--------O-E0----CL02-------------------------
INT E0 - REAL/32 - "C_WRITE" - WRITE CHARACTER TO DEFAULT CONSOLE
        CL = 02h
        DX = character
Return: nothing
        may destroy SI,DI???
Note:   Tab characters are expanded to blanks up to the next multiple of
          eight columns
SeeAlso: INT E0/CL=01h,INT E0/CL=06h,INT 21/AH=02h
--------O-E0----CL03-------------------------
INT E0 - DR Multiuser DOS - "A_READ" - READ CHARACTER FROM DEFAULT AUX DEVICE
        CL = 03h
Return: AL = ASCII character
        may destroy SI,DI???
Notes:  A_READ reads the next 8-bit character from the logical auxilliary
          input device (AUXn:); control is not returned to the calling
          process until a character has been read.
        if another process owns AUX, this call blocks until the device becomes
          available
        this function is also supported by REAL/32
SeeAlso: INT 21/AH=03h,INT E0/CL=04h,INT E0/CL=07h,INT E0/CL=A5h,INT E0/CL=ACh
--------O-E0----CL04-------------------------
INT E0 - DR Multiuser DOS - "A_WRITE" - WRITE CHARACTER TO DEFAULT AUX DEVICE
        CL = 04h
        DL = BYTE to write
Return: nothing
        may destroy SI,DI,DH???
Note:   if another process owns AUX, this call blocks until the device becomes
          available
SeeAlso: INT 21/AH=04h,INT E0/CL=03h,INT E0/CL=08h,INT E0/CL=A5h,INT E0/CL=ADh
--------O-E0----CL05-------------------------
INT E0 - REAL/32 - "L_WRITE" - WRITE CHARACTER TO DEFAULT LIST DEVICE
        CL = 05h
        DL = char to write
Return: nothing
        may destroy SI,DI???
Note:   if another process owns the list device, this call blocks until the
          device becomes available
SeeAlso: INT 21/AH=05h
--------O-E0----CL06-------------------------
INT E0 - REAL/32 - "C_RAWIO" - PERFORM RAW I/O WITH DEFAULT CONSOLE
        CL = 06h
        DL = mode describing the operation to be performed
            FFh get console input/status
            FEh get console status
            FDh get console input (blocking)
            else output DL to the console as a character
Return: AX = returned value
            for DL = FFh, the character or 00h if none available
            for DL = FEh, 00h if no characters available, FFh if any available
            for DL = FDh, the character read from the console
            else AX = 0000h
        may destroy SI,DI???
Notes:  during raw I/O, the special characters ^C, ^O, ^P, and ^S are not
          interpreted, but are passed through
        if the virtual console is in ^S mode and the owning process calls
          this function, the ^S state is cleared
SeeAlso: INT E0/CL=01h,INT E0/CL=02h,INT 21/AH=06h
--------O-E0----CL07-------------------------
INT E0 - DR Multiuser DOS - "A_STATIN" - GET INPUT STATUS OF AUX DEVICE
        CL = 07h
Return: AL = status
            00h not ready
            FFh character available
Desc:   determine whether the current AUX device has input available
SeeAlso: INT E0/CL=03h,INT E0/CL=08h
--------O-E0----CL08-------------------------
INT E0 - DR Multiuser DOS - "A_STATOUT" - GET OUTPUT STATUS OF AUX DEVICE
        CL = 08h
Return: AL = status
            00h not ready
            FFh ready for output
Desc:   determine whether the current AUX device is able to accept more output
SeeAlso: INT E0/CL=04h,INT E0/CL=07h
--------O-E0----CL09-------------------------
INT E0 - REAL/32 - "C_WRITESTR" - WRITE STRING TO DEFAULT CONSOLE
        CL = 09h
        DS:DX -> string
Return: nothing
        may destroy SI,DI,DS???
Note:   the string terminated with a '$' character (24h) by default; the
          terminator may be changed with C_DELIMIT
        tabs are expanded to the next multiple of eight columns
SeeAlso: INT E0/CL=6Eh
--------O-E0----CL0A-------------------------
INT E0 - REAL/32 - "C_READSTR" - READ STRING FROM DEFAULT CONSOLE
        CL = 0Ah
        DS:DX -> buffer for string (see #04022)
Return: nothing

Format of REAL/32 "C_READSTR" buffer:
Offset  Size    Description     (Table 04022)
 00h    BYTE    maximum number of characters buffer can hold
 01h    BYTE    actual number of buffers read
 02h  N BYTEs   input line
--------O-E0----CL0B-------------------------
INT E0 - REAL/32 - "C_STAT" - RETURN DEFAULT CONSOLE INPUT STATUS
        CL = 0Bh
Return: AX = status
            0000h no characters ready
            0001h character available
        may destroy SI,DI???
Note:   after setting bit 0 of the console mode word with C_MODE, this function
          will only return AX=0001h when the user presses Ctrl-C.
--------O-E0----CL0C-------------------------
INT E0 - REAL/32 - "S_BDOSVER" - GET BDOS VERSION
        CL = 0Ch
Return: AX = version (see #04023)
        may destroy SI,DI???
SeeAlso: INT E0/CL=A3h,INT 21/AX=4451h

(Table 04023)
Values for REAL/32 BDOS version:
 1432h  - DR Concurrent PC DOS Version 3.2
 1441h  - DR Concurrent DOS Version 4.1
 1450h  - DR Concurrent DOS/XM Version 5.0
 1463h  - DR Multiuser DOS Release 5.0
 1465h  - DR Multiuser DOS Release 5.01
 1466h  - DR Multiuser DOS Release 5.1, IMS Multiuser DOS Enhanced Release 5.1
 1467h  - IMS Multiuser DOS Version 7.0, 7.1
 1468h  - IMS REAL/32 Version 7.50, 7.51
 1469h  - IMS REAL/32 Version 7.52, 7.53
 14??h  - IMS REAL/32 Version 7.6
SeeAlso: #01579,#01580,#01581
--------O-E0----CL2F-------------------------
INT E0 - REAL/32 - "P_CHAIN" - CHAIN PROCESS
        CL = 2Fh
        [DTA] = ASCIZ command line for process to start
Return: AX = return code
            0000h successful
            FFFFh failed
        may destroy SI,DI???
--------O-E0----CL35-------------------------
INT E0 R - REAL/32 - "MC_MAX" - CP-M/86 ALLOCATE MAXIMUM MEMORY
        CL = 35h
        DS:DX -> MCB (see #04024)
Return: AX = status
        may destroy SI,DI,DS???
SeeAlso: INT E0/CL=39h

Format of REAL/32 MCB (Memory Control Block):
Offset  Size    Description     (Table 04024)
 00h    WORD    segment address of memory block
 02h    WORD    length of block in paragraphs
 04h    BYTE    reserved (0)
--------O-E0----CL36-------------------------
INT E0 R - REAL/32 - "MC_ABSMAX" - ALLOCATE MAXIMUM MEMORY SEGMENT ABSOLUTE
        CL = 36h
        DS:DX -> MCB (see #04024)
Return: AX = status
        may destroy SI,DI,DS???
SeeAlso: INT E0/CL=39h
--------O-E0----CL37-------------------------
INT E0 R - REAL/32 - "MC_ALLOC" - CP-M/86 ALLOCATE MEMORY SEGMENT
        CL = 37h
        DS:DX -> MCB (see #04024)
Return: AX = status
        may destroy SI,DI,DS???
SeeAlso: INT E0/CL=39h
--------O-E0----CL38-------------------------
INT E0 R - REAL/32 - "MC_ABSALLOC" - ALLOCATE MEMORY SEGMENT ABSOLUTE
        CL = 38h
        DS:DX -> MCB (see #04024)
Return: AX = status
        may destroy SI,DI,DS???
SeeAlso: INT E0/CL=39h
--------O-E0----CL39-------------------------
INT E0 R - REAL/32 - "MC_FREE" - CP-M/86 FREE SPECIFIED MEMORY SEGMENT
        CL = 39h
        DS:DX -> MCB (see #04024)
Return: AX = status
        may destroy SI,DI,DS???
SeeAlso: INT E0/CL=3Ah
--------O-E0----CL3A-------------------------
INT E0 R - REAL/32 - "MC_ALLFREE" - CP-M/86 FREE ALL MEMORY
        CL = 3Ah
Return: nothing???
Desc:   release all of the calling process's memory except the User Data Area
SeeAlso: INT E0/CL=39h
--------O-E0----CL3B-------------------------
INT E0 u - REAL/32 - "P_LOAD" - LOAD .CMD FILE INTO MEMORY
        CL = 3Bh
        ???
Return: ???
Note:   IMS does not document the details of this call because .CMD files are
          supported for backward compatibility only
--------O-E0----CL40-------------------------
INT E0 - REAL/32 - "N_LOGON" - LOG ONTO A SERVER
        CL = 40h
        DS:DX -> LPB (see #04025)
Return: AX = status (0000h,00FFh,07FFh,0DFFh,0EFFh,FFFFh) (see #04030)
        may destroy SI,DI,DS???
SeeAlso: INT E0/CL=41h

Format of REAL/32 Logon/Logoff Parameter Block:
Offset  Size    Description     (Table 04025)
 00h    BYTE    node ID
 01h  8 BYTEs   password for server access
 09h    DWORD   -> process descriptor of process to be logged on (see #04026)

Format of REAL/32 Process Descriptor:
Offset  Size    Description     (Table 04026)
 00h    WORD    offset of next entry in current descriptor list
 02h    WORD    offset of thread list
 04h    BYTE    current processor status (see #04027)
 05h    BYTE    priority
 06h    WORD    runtime flags (see #04028)
 08h  8 BYTEs   process name
 10h    WORD    segment of User Data Area (256 or 352 bytes)
 12h    BYTE    current default disk drive
 13h    BYTE    drive from which process was loaded
 14h    WORD    reserved (0)
 16h    WORD    offset of memory descriptor list for memory owned by process
 18h  6 BYTEs   reserved
 1Eh    WORD    offset of process descriptor for parent process
                0000h if parent has already terminated
 20h    BYTE    number of default console
 21h    BYTE    number of default AUX device
 22h  2 BYTEs   reserved
 24h    BYTE    number of default list device
 25h    BYTE    reserved
 26h    WORD    flags (see #04029)
 28h 12 BYTEs   reserved
 34h    WORD    offset of memory page allocation root
 36h 22 BYTEs   reserved
SeeAlso: #04025

(Table 04027)
Values for REAL/32 processor status:
 00h    process is ready to run
 01h    process is polling a device
 02h    delaying for a number of ticks
 03h    in swap list
 04h    terminating
 05h    asleep
 06h    waiting to read a message from a queue
 07h    waiting to write a message
 08h    waiting on system flag or semaphore
 09h    waiting to attach to an I/O device
 0Ah    waiting on sync block
 0Bh    waiting for system flag or semaphore with timeout
 0Ch    forced dispatch
SeeAlso: #04026

Bitfields for REAL/32 process flags:
Bit(s)  Description     (Table 04028)
 0      system process
 1      do not terminate
 2      special rsp process
 3      from process descriptor table
 14-4   unused???
 15     uses math coprocessor
SeeAlso: #04026,#04029

Bitfields for REAL/32 secondary flags:
Bit(s)  Description     (Table 04029)
 0      suspend when in background
 1      ???
 2      in foreground
 3      enable APPEND processing on file opens
 4      Ctrl-C was typed
 5      Ctrl-C will reset disk system
 6      OK to read locked record
 7      ???
 8      do not perform banking
SeeAlso: #04026,#04028

(Table 04030)
Values for REAL/32 "N_LOGON" status:
 0000h  successful
 00FFh  server could not create shadow process
 07FFh  incorrect password
 0CFFh  not logged into specified server
 0DFFh  process already logged onto 16 servers,
        LPB process not attached to network
 0EFFh  physical transmission prevented message or response from getting thru
        network error during logoff
 FFFFh  calling process not attached to network
--------O-E0----CL41-------------------------
INT E0 - REAL/32 - "N_LOGON" - LOG OFF A SERVER
        CL = 41h
        DS:DX -> LPB (see #04025)
Return: AX = status (0000h,0CFFh,0DFFh,0EFFh,FFFFh) (see #04030)
        may destroy SI,DI,DS???
SeeAlso: INT E0/CL=40h
--------O-E0----CL44-------------------------
INT E0 - REAL/32 - "N_STAT" - GET NETWORK STATUS
        CL = 44h
Return: AX = network status or 0FFFh on error
            bit 8: calling process is attached to network
        may destroy SI,DI???
--------O-E0----CL45-------------------------
INT E0 - REAL/32 - "N_RCT" - GET REQUESTOR CONFIGURATION TABLE
        CL = 45h
        DS:DX -> RCT Control Block (see #04031,#04032)
Return: AX = status or error code (see #04033,#04030)
        may destroy SI,DI,DS???
SeeAlso: INT E0/CL=47h

Format of REAL/32 RCT Control Block for Drives:
Offset  Size    Description     (Table 04031)
 00h    BYTE    command byte
                00h map disk drive
                02h map list device
 01h    BYTE    local resource ID
 02h    BYTE    remote resource ID
 03h    BYTE    server node ID number
Note:   the RCT Control Block is a union of two possible structures; this
          variant is used when mapping disk drives and list devices
SeeAlso: #04032

Format of REAL/32 RCT Control Block for Queues:
Offset  Size    Description     (Table 04032)
 00h    BYTE    command byte
                03h map local queue to server
                04h unmap queue
 01h  8 BYTEs   local queue name (case-sensitive)
 09h  8 BYTEs   remote queue name (case-sensitive)
 11h    BYTE    server node ID number
Note:   the RCT Control Block is a union of two possible structures; this
          variant is used when mapping queues
SeeAlso: #04031

(Table 04033)
Values for REAL/32 "N_RCT" status:
 0000h  successful
 0001h  invalid local device
 0002h  invalid remote device
 0003h  no queue entry space
--------O-E0----CL47-------------------------
INT E0 - REAL/32 - "N_SCT" - GET SERVER CONFIGURATION TABLE
        CL = 47h
        DS:DX -> 112-byte buffer for Server Configuration Table (see #04034)
Return: AX = status (0000h successful, else error code)
        may destroy SI,DI,DS???
Note:   the first byte of the SCT buffer is set to the desired server number
          prior to calling this function
SeeAlso: INT E0/CL=45h

Format of REAL/32 Server Configuration Table:
Offset  Size    Description     (Table 04034)
 00h    BYTE    server's default physical drive ID
 01h    BYTE    network status
 02h    BYTE    server node ID number
 03h    BYTE    maximum number of requesters supported by server
 04h    BYTE    current number of shadow processes
 05h 108 BYTEs  six logon structures, each:
                Offset  Size    Description
                 00h    WORD    bit vector of logged-in nodes
                 02h 16 BYTEs   list of requester node IDs
--------O-E0----CL48-------------------------
INT E0 - REAL/32 - "N_ERRMODE" - SET NETWORK ERROR MODE
        CL = 48h
        DL = new error mode
            FFh return error in registers AX,BX,CX
            FEh display message and return error
            FDh display message and abort (default)
Return: CX = error code (0000h successful, FFFFh failed)
        may destroy SI,DI???
Desc:   specify how the REAL/32 Net Server responds to error numbers 0CFFh,
          0DFFh, and 0EFFh (see #04030)
--------O-E0----CL59-------------------------
INT E0 - ConcCP/M,DR Multiuser DOS - "S_MEMORY" - RESERVE MEMORY IN GLOBAL AREA
        CL = 59h
        DX = size in bytes
Return: AX = status
            FFFFh failed
            other successful
                ES:BX -> reserved memory
--------O-E0----CL5C-------------------------
INT E0 - REAL/32 - "P_PATH" - SCAN PATH FOR EXECUTABLE FILE
        CL = 5Ch
        DS:DX -> Exec Parameter Block (EPB) (see #04035)
Return: AX = status
            FFFEh file not found
            FFFDh path not found
            FFFCh too many handles open
            FFFBh access denied
            FFF6h invalid environment
            FFDCh sharing conflict
            FFAAh invalid password
        EPB updated (if successful)
        may destroy SI,DI,DS
SeeAlso: INT E0/CL=5Dh,INT E0/CL=5Eh,INT 21/AH=4Bh

Format of REAL/32 Exec Parameter Block (EPB):
Offset  Size    Description     (Table 04035)
 00h    DWORD   -> ASCIZ command to be executed
 04h    BYTE    type of exec
                00h .CMD
                01h .COM
                02h .EXE
                03h .BAT
                04h RSP-type queue
 05h    BYTE    flags
                bit 0: overlay existing program
                bit 1: don't assign console to child
                bit 2: allocate memory for .CMD within parent's memory space
                bit 3: make full banked window available while loading child
 06h    DWORD   32-bit offset to ASCIZ command line
 0Ah    WORD    selector for ASCIZ command line
--------O-E0----CL5D-------------------------
INT E0 - REAL/32 - "P_EXEC" - EXECUTE CHILD PROCESS
        CL = 5Dh
        DS:DX -> Exec Parameter Block (EPB) (see #04035)
Return: AX = status
            FFFEh file not found
            FFFDh path not found
            FFFCh too many handles open
            FFFBh access denied
            FFF6h invalid environment
            FFDCh sharing conflict
            FFAAh invalid password
        EPB updated (if successful)
        may destroy SI,DI,DS
SeeAlso: INT E0/CL=5Ch,INT E0/CL=5Eh,INT 21/AH=4Bh
--------O-E0----CL5E-------------------------
INT E0 - REAL/32 - "P_EXITCODE" - GET/SET PROCESS EXIT CODE
        CL = 5Eh
        DX = exit code or FFFFh to get
            DH ignored when setting code
            DL = process exit code
Return: AX = status (FFFFh on error)
        if getting:
            AH = termination reason
                00h normal
                01h external termination via Ctrl-C or P_ABORT
                02h hardware (critical) error abort
                03h child did not terminate
                FFh illegal request (no child, or exit code already retrieved)
            AL = process exit code
SeeAlso: INT E0/CL=5Dh,INT 21/AH=4Ch
--------O-E0----CL6B-------------------------
INT E0 - REAL/32 - "S_SERIAL" - GET OS SERIAL NUMBER
        CL = 6Bh
        DS:DX -> 6-byte buffer for ASCII serial number
Return: nothing???
--------O-E0----CL6D-------------------------
INT E0 - REAL/32 - "C_MODE" - GET/SET CONSOLE MODE
        CL = 6Dh
        DX = new console mode (see #04036), or FFFFh to get current mode
Return: AX = status if setting (0000h = success)
        AX = current console mode if DX=FFFFh on entry

Bitfields for REAL/32 console mode:
Bit(s)  Description     (Table 04036)
 0      C_STAT function will return 01h only when Ctrl-C is pressed
 1      disable support for stop/start scroll (Ctrl-S/Ctrl-Q)
 2      raw console output (no tab expansion, no printer echo)
 3      disable program termination on Ctrl-C
 7      disable Ctrl-O console bit-bucket
 10     enable Esc as end-of-line character
--------O-E0----CL6E-------------------------
INT E0 - REAL/32 - "C_DELIMIT" - GET/SET STRING DELIMITER
        CL = 6Eh
        DX = new delimiter, or FFFFh to get current string delimiter
Return: AX = status (0000h success) if setting
        AX = current string delimiter (default is 24h '$' at process start)
SeeAlso: INT E0/CL=09h
--------O-E0----CL6F-------------------------
INT E0 - REAL/32 - "C_WRITEBLK" - WRITE BLOCK TO DEFAULT CONSOLE
        CL = 6Fh
        DS:DX -> Character Control Block (see #04051,#04052)
Return: nothing???
SeeAlso: INT E0/CL=70h
--------O-E0----CL70-------------------------
INT E0 - REAL/32 - "L_WRITEBLK" - WRITE BLOCK TO DEFAULT LIST (PRINTER) DEVICE
        CL = 70h
        DS:DX -> Character Control Block (see #04051,#04052)
Return: nothing???
SeeAlso: INT E0/CL=6Fh
--------O-E0----CL71-------------------------
INT E0 R - ConcCP/M,DR Multiuser DOS - EXECUTE DOS-COMPATIBLE FUNCTIONS
        CL = 71h
        DS:DX -> parameter block (see #04038)
Return: AX = status (0000h successful, else error code)
        may destroy SI,DI,DS

(Table 04037)
Values for DR "execute DOS-compatible function" function number:
 00h    "fd_getdpb"     get disk information (see also INT 21/AH=32h)
 01h    "fd_mkdir"      create directory (see also INT 21/AH=39h)
 02h    "fd_rmdir"      remove directory (see also INT 21/AH=3Ah)
 03h    "fd_chdir"      change directory (see also INT 21/AH=3Bh)
 04h    "fd_creat"      create file (see also INT 21/AH=3Ch)
 05h    "fd_open"       open existing file (see also INT 21/AH=3Dh)
 06h    "fd_close"      close file (see also INT 21/AH=3Eh)
 07h    "fd_read"       read from file (see also INT 21/AH=3Fh)
 08h    "fd_write"      write to file (see also INT 21/AH=40h)
 09h    "fd_delete"     delete file (see also INT 21/AH=41h)
 0Ah    "fd_lseek"      get/set file position (see also INT 21/AH=42h)
 0Bh    "fd_chmod"      get/set file attributes (see also INT 21/AH=43h)
 0Ch    "fd_curdir"     get current directory (see also INT 21/AH=47h)
 0Dh    "fd_sfirst"     find first matching file (see also INT 21/AH=4Eh)
 0Eh    "fd_snext"      find next matching file (see also INT 21/AH=4Fh)
 0Fh    "fd_rename"     rename file (see also INT 21/AH=56h)
 10h    "fd_gsfdate"    get/set file date (see also INT 21/AX=5700h)
 11h    "fd_mktemp"     make temporary file (see also INT 21/AH=5Ah)
 12h    "fd_mknew"      create new file (see also INT 21/AH=5Bh)
 13h    "fd_lock"       lock/unlock file data (see also INT 21/AH=5Ch)
 14h    "fd_dup"        duplicate file handle (see also INT 21/AH=45h)
 15h    "fd_dup2"       force duplicate file handle (see also INT 21/AH=46h)
 16h-19h ???
 1Ah    "fd_ioctl"      I/O control emulation
 1Bh    "fd_commit"     commit file to disk (see also INT 21/AH=68h)
 1Ch    "fd_expand"     expand file name (see also INT 21/AH=60h)
 1Dh    ???
 1Eh    ???
 1Fh    "fd_sethandles" set number of handles for calling process
SeeAlso: #04038

Format of DR "execute DOS-compatible function" parameter block:
Offset  Size    Description     (Table 04038)
 00h    WORD    function number (see #04037)
---function 00h---
 02h    WORD    drive
 04h    DWORD   -> DPB (see #04039)
---function 01h,02h,03h---
 02h    DWORD   -> ASCIZ directory name
---function 04h---
 02h    DWORD   -> ASCIZ filename
 06h    WORD    file attributes
---function 05h---
 02h    DWORD   -> ASCIZ filename
 06h    WORD    open mode (see INT 21/AH=3Dh)
---function 06h---
 02h    WORD    file handle
---function 07h,08h---
 02h    WORD    file handle
 04h    DWORD   -> buffer
 08h    WORD    number of bytes to read or write
---function 09h---
 02h    DWORD   -> ASCIZ filename
---function 0Ah---
 02h    WORD    file handle
 04h    DWORD   (call) desired offset
                (ret) new file position if function is successful
 08h    WORD    seek origin (offset is calculated from specified position)
                00h start of file
                01h current position
                02h end of file
---function 0Bh---
 02h    DWORD   -> ASCIZ filename
 06h    WORD    (call) new file attributes or new file owner
                (ret) current/new file attributes, depending on function
 08h    WORD    subfunction
                00h get attribute
                01h set attribute
                02h get extended attributes
                03h set extended attributes (and password)
                04h get encrypted password
                05h set extended attributes (and encrypted password)
                06h get file owner
                07h set file owner
                Note: the password is taken from the first 8 bytes of the DTA
---function 0Ch---
 02h    WORD    drive
 04h    DWORD   -> 64-byte buffer for ASCIZ current directory path
---function 0Dh---
 02h    DWORD   -> ASCIZ filespec
 06h    WORD    file attributes
 08h    WORD    (call) size of buffer pointed at by current DTA
                (ret) number of matching files returned???
                Note:   if the volume label attribute is specified, the root
                          directory will be searched
                        if the buffer is at least 47 bytes, multiple matching
                          entries will be stored in the DTA (at 21 bytes per
                          entry)
---function 0Eh---
 02h    WORD    number of additional matches to store in DTA
                (normally set to 0, but if DTA is at least 47 bytes, can be
                  set to (DTAsize-21)/26 to return multiple matches)
---function 0Fh---
 02h    DWORD   -> ASCIZ filename
 06h    DWORD   -> ASCIZ new name
---function 10h---
 02h    WORD    file handle
 04h    WORD    subfunction
                00h get date and time
                01h set date and time
 06h    WORD    file date
 08h    WORD    file time
---function 11h---
 02h    DWORD   -> ASCIZ pathname + 13 extra bytes for generated filename
                (if pathname does not end in backslash, one will be appended)
 06h    WORD    file attributes
---function 12h---
 02h    DWORD   -> ASCIZ filename
 06h    WORD    file attributes
---function 13h---
 02h    WORD    file handle
 04h    DWORD   offset of start of region
 08h    DWORD   length of region to lock/unlock
 0Ch    WORD    subfunction (00h = lock, 01h = unlock)
---function 14h---
 02h    WORD    file handle to be duplicated
                (new file handle is returned as function return value)
---function 15h---
 02h    WORD    file handle to be duplicated
 04h    WORD    file handle which is to become the duplicate
---function 1Ah, form 1---
 02h    WORD    file handle
 04h    WORD    IOCTL function number (00h,01h,06h,07h,0Ah)
 06h    WORD    (ret) status
---function 1Ah, form 2---
 02h    WORD    drive number
 04h    WORD    IOCTL function number (08h,09h,0Eh,0Fh)
 06h    WORD    (ret) status
---function 1Ah, form 3---
 02h    WORD    file handle
 04h    WORD    IOCTL function number (02h,03h,54h)
 06h    DWORD   -> buffer
 0Ah    WORD    (call) size of buffer in bytes
                (ret) size of returned data
---function 1Ah, form 4---
 02h    WORD    drive number
 04h    WORD    IOCTL function number (04h,05h)
 06h    DWORD   -> buffer
 0Ah    WORD    (call) size of buffer in bytes
                (ret) size of returned data
---function 1Bh---
 02h    WORD    file handle of file to be committed to disk
---function 1Ch---
 02h    DWORD   -> ASCIZ relative filename
 06h    DWORD   -> buffer for absolute filename
---function 1Fh---
 02h    WORD    desired number of file handles for process

Format of DR Multiuser DOS Disk Parameter Block (DPB):
Offset  Size    Description     (Table 04039)
 00h    BYTE    drive number (00h = A:)
 01h    BYTE    relative unit number
 02h    WORD    sector size in bytes
 04h    BYTE    sectors per cluster - 1
 05h    BYTE    shift count to convert clusters into sectors
 06h    WORD    number of reserved sectors at beginning of drive
 08h    BYTE    number of FATs
 09h    WORD    number of root directory entries
 0Bh    WORD    number of first sector containing user data
 0Dh    WORD    number of clusterse on disk
 0Fh    BYTE    number of sectors per FAT
 10h    WORD    sector number of first directory sector
 12h  4 BYTEs   reserved
 16h    BYTE    media ID byte (see #01356)
 17h    BYTE    00h if disk accessed, FFh if not
 18h  6 BYTEs   reserved
 1Eh    WORD    number of free clusters on drive
Note:   this structure is a subset of the MS-DOS 3.x Drive Parameter Block
SeeAlso: #04038,#01357 at INT 21/AH=1Fh,#01395 at INT 21/AH=32h
--------O-E0----CL73-------------------------
INT E0 - GSX-86, GEM/1, GEM/2 - API
        CL = 73h
        CH = 04h
        DS:DX -> parameter block
--------O-E0----CL80-------------------------
INT E0 - REAL/32 - "M_ALLOC" - ALLOCATE MEMORY
        CL = 80h
        DS:DX -> Memory Parameter Block (MPB) (see #04040)
Return: AX = status (0000h success, else error code)
SeeAlso: INT E0/CL=81h

Format of REAL/32 Memory Parameter Block (MPB):
Offset  Size    Description     (Table 04040)
 00h    WORD    (call) desired starting paragraph of block, or
                  0000h for anywhere
                (ret) starting paragraph of allocated block
 02h    WORD    (call) minimum number of paragraphs required
                (ret) actual number of paragraphs allocated
 04h    WORD    (call) maximum number of paragraphs to allocate
                (ret) actual number of paragraphs allocated
 06h    WORD    process descriptor (see #04026) of memory's owner or 0000h
 08h    WORD    flags (normally set to 0000h on call)
SeeAlso: #04041
--------O-E0----CL81-------------------------
INT E0 - REAL/32 - "M_FREE" - DEALLOCATE MEMORY
        CL = 81h
        DS:DX -> Memory Free Parameter Block (MFPB) (see #04041)
Return: AX = status (0000h success, else error code)
SeeAlso: INT E0/CL=81h

Format of REAL/32 Memory Free Parameter Block (MFPB) :
Offset  Size    Description     (Table 04041)
 00h    WORD    starting segment of block to be freed
 02h    WORD    reserved (0)
SeeAlso: #04040
--------O-E0----CL84-------------------------
INT E0 - REAL/32 - "DEV_WAITFLAG" - WAIT ON SYSTEM FLAG
        CL = 84h
        DX = system flag ID
Return: AX = status (0000h success, else error code)
        if successful, this function does not return until the system flag has
          been set by an interrupt handler (see INT E0/CL=85h); if the flag was
          already set, this call returns immediately
SeeAlso: INT E0/CL=85h,INT E0/CL=B7h
--------O-E0----CL85-------------------------
INT E0 - REAL/32 - "DEV_SETFLAG" - SET SYSTEM FLAG
        CL = 85h
        DX = system flag ID
Return: AX = status (0000h success, else error code)
Note:   REAL/32 returns an error if the flag was already set, which indicates
          that a previous logical interrupt has not yet been serviced
SeeAlso: INT E0/CL=84h
--------O-E0----CL86-------------------------
INT E0 - ConcCP/M,DR Multiuser DOS - "Q_MAKE" - CREATE MESSAGE QUEUE
        CL = 86h
        DS:DX -> queue descriptor (see #04042)
Return: AX = status (0000h success, FFFFh failure)
        CX = error code (see #04021)
Note:   also supported by REAL/32
SeeAlso: INT E0/CL=87h

Format of DR Multiuser DOS queue descriptor:
Offset  Size    Description     (Table 04042)
 00h  2 WORDs   internal use, initialize to zeros
 04h    WORD    queue flags (see #04043)
 06h  8 BYTEs   queue name
 0Eh    WORD    length of message
 10h    WORD    number of messages
 12h  4 WORDs   internal use, initialize to zeros
 1Ah    WORD    offset in system area of buffer for messages

Bitfields for REAL/32 queue flags:
Bit(s)  Description     (Table 04043)
 0      mutual exclusion queue
 1      can not be deleted
 2      restricted to system processes
 3      RSP message queue
 4      reserved for internal use
 5      RPL address queue
 7-6    reserved for internal use
 15-8   reserved for future use
SeeAlso: #04042
--------O-E0----CL87-------------------------
INT E0 - ConcCP/M,DR Multiuser DOS - "Q_OPEN" - OPEN MESSAGE QUEUE
        CL = 87h
        DS:DX -> queue parameter block (QPB) (see #04044,#04045)
Return: AX = status (0000h success, FFFFh failure)
        CX = error code (see #04021)
Note:   also supported by REAL/32
SeeAlso: INT E0/CL=86h,INT E0/CL=88h,INT E0/CL=89h

Format of DR Multiuser DOS queue parameter block:
Offset  Size    Description     (Table 04044)
 00h    WORD    internal use, initialize to zero
 02h    WORD    queue ID (set by INT E0/CL=87h)
 04h    WORD    internal use, initialize to zero
 06h    WORD    offset of queue message buffer
                (REAL/32) if FFFFh, then full address of buffer is stored at
                  offest 10h
 08h  8 BYTEs   queue name
---REAL/32 only----
 10h    DWORD   segment:offset of queue message buffer
SeeAlso: #04045

Format of protected-mode REAL/32 Queue Parameter Block (QPB):
Offset  Size    Description     (Table 04045)
 00h    WORD    internal use
 02h    WORD    queue ID
 04h    WORD    internal use
 06h    DWORD   32-bit offset to buffer
 0Ah    WORD    selector for buffer
 0Ch  8 BYTEs   queue name
SeeAlso: #04044
--------O-E0----CL88-------------------------
INT E0 - REAL/32 - "Q_DELETE" - DELETE SYSTEM QUEUE
        CL = 88h
        DS:DX -> queue parameter block (QPB) (see #04044,#04045)
Return: AX = status (0000h success, FFFFh failure)
SeeAlso: INT E0/CL=87h
--------O-E0----CL89-------------------------
INT E0 - ConcCP/M,DR Multiuser DOS - "Q_READ" - READ MESSAGE QUEUE
        CL = 89h
        DS:DX -> queue parameter block (QPB) (see #04044,#04045)
Return: AX = status (0000h success, FFFFh failure)
        CX = error code (see #04021)
Note:   also supported by REAL/32
SeeAlso: INT E0/CL=87h,INT E0/CL=8Ah,INT E0/CL=8Bh,INT E0/CL=B6h
--------O-E0----CL8A-------------------------
INT E0 - ConcCP/M,DR Multiuser DOS - "Q_CREAD" - CONDITIONALLY READ MSG QUEUE
        CL = 8Ah
        DS:DX -> queue parameter block (QPB) (see #04044,#04045)
Return: AX = status (0000h success, FFFFh failure)
        CX = error code (see #04021)
Note:   also supported by REAL/32
SeeAlso: INT E0/CL=87h,INT E0/CL=89h,INT E0/CL=8Ch,INT E0/CL=B6h
--------O-E0----CL8B-------------------------
INT E0 - ConcCP/M,DR Multiuser DOS - "Q_WRITE" - WRITE MESSAGE QUEUE
        CL = 8Bh
        DS:DX -> queue parameter block (QPB) (see #04044,#04045)
Return: AX = status (0000h success, FFFFh failure)
        CX = error code (see #04021)
Note:   also supported by REAL/32
SeeAlso: INT E0/CL=89h,INT E0/CL=8Ch
--------O-E0----CL8C-------------------------
INT E0 - ConcCP/M,DR Multiuser DOS - "Q_CWRITE" - CONDITIONALLY WRITE MSG QUEUE
        CL = 8Ch
        DS:DX -> queue parameter block (QPB) (see #04044,#04045)
Return: AX = status (0000h success, FFFFh failure)
        CX = error code (see #04021)
Note:   also supported by REAL/32
SeeAlso: INT E0/CL=8Ah,INT E0/CL=8Bh
--------O-E0----CL8E-------------------------
INT E0 - ConcCP/M,DR Multiuser DOS - "P_DISPATCH" - CALL DISPATCHER
        CL = 8Eh
        DX = FFFFh (optional) to force dispatch
Return: nothing
Desc:   allow other processes of the same or higher priority to run if they
          are ready
Notes:  if DX=FFFFh, a dispatch is forced even if no other process is ready
        also supported by REAL/32
SeeAlso: INT E0/CL=91h,INT 15/AX=1000h,INT 2F/AX=1680h
--------O-E0----CL8F-------------------------
INT E0 - REAL/32 - "P_TERM" - TERMINATE CALLING PROCESS
        CL = 8Fh
        DX = termination code
Return: never if successful
        AX = FFFFh on failure
Note:   this function can not terminate processes whose KEEP flag is set
        if the termination code is FFh, this function can terminate the process
          even if its SYSTEM flag is on; otherwise, only user processes can
          terminate themselves
SeeAlso: INT E0/CL=90h,INT 21/AH=4Ch
--------O-E0----CL90-------------------------
INT E0 - REAL/32 - "P_CREATE" - CREATE A PROCESS
        CL = 90h
        DS:DX -> process descriptor in calling process' system memory area
                (see #04026)
Return: AX = status
Notes:  this call can create more than one process if the specied process
          descriptor's link (next-process) field is nonzero
        all reserved and unused fields in the process descriptor should be
          filled with zeros; passing an invalid descriptor or pointer may
          crash the system because the descriptor is not checked by the OS
        the newly-created process(es) is always a native process, which can not
          make DOS calls
SeeAlso: INT E0/CL=8Fh
--------O-E0----CL91-------------------------
INT E0 - ConcCP/M,DR Multiuser DOS - "P_PRIORITY" - SET PROCESS PRIORITY
        CL = 91h
        DL = new priority (00h highest to FFh lowest)
Return: nothing
Notes:  sets priority of calling process; transient processes are initialized
          to priority C8h
        also supported by REAL/32
SeeAlso: INT E0/CL=8Eh
--------O-E0----CL92-------------------------
INT E0 - ConcCP/M,DR Multiuser DOS - "C_ATTACH" - ATTACH TO DEFAULT CONSOLE
        CL = 92h
Return: AX = status
Notes:  also supported by REAL/32
        if the console is currently owned by another process, this function
          waits until the console is available
SeeAlso: INT E0/CL=93h,INT E0/CL=94h,INT E0/CL=99h,INT E0/CL=9Eh,INT E0/CL=A2h
--------O-E0----CL93-------------------------
INT E0 - ConcCP/M,DR Multiuser DOS - "C_DETACH" - DETACH FROM DEFAULT CONSOLE
        CL = 93h
Return: AX = status
            0000h successfully detached
            FFFFh detach failed
Note:   also supported by REAL/32
SeeAlso: INT E0/CL=92h,INT E0/CL=A6h
--------O-E0----CL94-------------------------
INT E0 - REAL/32 - "C_SET" - SET PROCESS'S DEFAULT CONSOLE
        CL = 94h
        DX = console ID
Return: AX = status (0000h success, else error code)
SeeAlso: INT E0/CL=92h,INT E0/CL=95h,INT E0/CL=99h
--------O-E0----CL95-------------------------
INT E0 - REAL/32 - "C_ASSIGN" - ASSIGN DEFAULT CONSOLE TO ANOTHER PROCESS
        CL = 95h
        DS:DX -> Assign Control Parameter Block (ACPB) (see #04046)
Return: AX = status
SeeAlso: INT E0/CL=94h,INT E0/CL=99h

Format of REAL/32 Assign Control Parameter Block (ACPB):
Offset  Size    Description     (Table 04046)
 00h    BYTE    ID of console to assign
 01h    BYTE    flag: if FFh, new process must have CNS as console for this
                  call to succeed
 02h    DWORD   -> process descriptor (see #04026) or 00000000h
 06h  8 BYTEs   name of process to search for if descriptor field above is zero
--------O-E0----CL96-------------------------
INT E0 - REAL/32 - "P_CLI" - RUN COMMAND LINE INTERFACE
        CL = 96h
        DS:DX -> Command Line Buffer (CLBUF) (see #04047)
Return: AX = status
Desc:   execute the indicated command concurrently with the calling process;
          system queue commands, .BAT, .CMD, .COM, and .EXE files can be
          executed
Note:   the calling process will lose its virtual console and must reattach it
          before attempting any I/O
SeeAlso: INT E0/CL=92h

Format of REAL/32 Command Line Buffer (CLBUF):
Offset  Size    Description     (Table 04047)
 00h    BYTE    reserved (0)
 01h 128 BYTEs  ASCIZ command line
 81h    BYTE    (0)
--------O-E0----CL99-------------------------
INT E0 - REAL/32 - "C_GET" - GET DEFAULT CONSOLE
        CL = 99h
Return: AX = default console ID
SeeAlso: INT E0/CL=94h
--------O-E0----CL9A-------------------------
INT E0 - REAL/32 - "S_SYSDAT" - GET SYSTEM DATA AREA
        CL = 9Ah
Return: ES:AX -> system data area (see #04048)
        may destroy SI,DI

Format of REAL/32 system data area:
Offset  Size    Description     (Table 04048)
 00h    DWORD   address of supervisor entry point
 04h 36 BYTEs   reserved
 28h    DWORD   address of XIOS entry point
 2Ch    DWORD   address of XIOS initialization point
 30h  8 BYTEs   reserved
 38h    DWORD   address of IRET dispatcher entry point
 3Ch    DWORD   address of RETF dispatcher entry point
 40h    WORD    segment of operating system code
 42h    WORD    paragraph address of first Resident System Process (RSP)
 44h    WORD    paragraph after OS system area
 46h    BYTE    reserved
 47h    BYTE    number of system console devices
 48h    BYTE    number of system list (printer) devices
 49h    BYTE    number of Character Control blocks
 4Ah    BYTE    number of system flags
 4Bh    BYTE    current search disk
 4Ch    WORD    maximum memory per process
 4Eh    BYTE    reserved
 4Fh    BYTE    "dayfile" (flag, true if FFh)
 50h    BYTE    default disk for temporary files
 51h    BYTE    system ticks per second (typically 60)
 52h    WORD    offset of Locked Unused list
 54h    WORD    offset of CCB table
 56h    WORD    offset of system flag table
 58h    WORD    offset of root of Memory Descriptor Unused list
 5Ah    WORD    offset of Memory Free list
 5Ch    WORD    offset of Process Unused list
 5Eh    WORD    offset of Queue Unused list
 60h  4 WORDs   (no longer used) QMAU
 68h    WORD    offset of root of Ready List
 6Ah    WORD    offset of root of Delay List
 6Ch    WORD    offset of Dispatcher Ready list
 6Eh    WORD    offset of root of Poll List
 70h    WORD    reserved
 72h    WORD    offset of root of Thread List
 74h    WORD    offset of root of Queue List
 76h    WORD    offset of Memory Allocation list
 78h    WORD    segment of version string
 7Ah    WORD    BDOS version number
 7Ch    WORD    OS version number
 7Eh    WORD    number of days since 01jan1978
 80h    BYTE    current time: hour
 81h    BYTE    current time: minute
 82h    BYTE    current time: second
 83h    BYTE    number of XIOS consoles
 84h    BYTE    number of XIOS list (printer) devices
 85h    BYTE    total number of character devices
 86h    WORD    offset of LCB table
 88h    WORD    bitmap of open files
 8Ah    BYTE    maximum locked records per process
 8Bh    BYTE    maximum open files per process
 8Ch    WORD    offset of process descriptor for math coprocessor's owner
 8Eh    WORD    offset of Auxiliary Control Block
 90h  8 BYTEs   reserved
 98h    WORD    offset of root Memory Window Descriptor
 9Ah    WORD    reserved
 9Ch    BYTE    number of Auxiliary Control Blocks
 9Dh    BYTE    default search disk
 9Eh    BYTE    reserved
 9Fh    BYTE    number of physical consoles
 A0h    DWORD   address of 8087 interrupt handler
 A4h    DWORD   address of default 8087 exception handler
 ...            reserved
C00h 82 BYTEs   XIOS header structure (see #04049)

Format of REAL/32 XIOS header structure:
Offset  Size    Description     (Table 04049)
 00h  3 BYTEs   XIOS initialization entry point
 03h  3 BYTEs   XIOS service entry point
 06h    WORD    segment address of system data
 08h    DWORD   address of supervisor entry point
 0Ch    BYTE    set tick flag
 0Dh    BYTE    ticks per second
 0Eh    BYTE    global Door Open interrupt flag
 0Fh    BYTE    number of Auxiliary Control Blocks
 10h    BYTE    number of physical consoles
 11h    BYTE    number of virtual consoles
 12h    BYTE    number of logical consoles
 13h    BYTE    number of list control blocks
 14h    WORD    offset of CCB table
 16h    WORD    offset of LCB table
 18h 16 WORDs   offsets into DPH for drives A-P
 38h    WORD    buffer size in paragraphs
 3Ah    WORD    offset of ACB table
 3Ch    WORD    used by OEM
 3Eh    WORD    offset of CCB pointer array
 40h    WORD    offset of LCB pointer array
 42h    WORD    offset of ACB pointer array
 44h    BYTE    'first' flag
 45h    BYTE    unused
 46h    WORD    offset of print device support table
 48h    WORD    offset of aux device support table
 4Ah    WORD    XIOS extra segment
 4Ch    WORD    segment of save end address for debug
 4Eh    WORD    segment of save start address for debug
 50h    BYTE    number of main virtual console
 51h    WORD    segment of XIOS code
SeeAlso: #04048
--------O-E0----CL9C-------------------------
INT E0 - REAL/32 - "P_PDADR" - GET ADDRESS OF PROCESS DESCRIPTOR
        CL = 9Ch
Return: ES:AX -> caller's process descriptor (see #04026)
        may destroy SI,DI
SeeAlso: INT E0/CL=8Fh,INT E0/CL=90h
--------O-E0----CL9D-------------------------
INT E0 - REAL/32 - "P_ABORT" - ABORT PROCESS BY NAME OR DESCRIPTOR
        CL = 9Dh
        DS:DX -> Abort Parameter Block (see #04050)
Return: AX = status
        may destroy SI,DI,DS
SeeAlso: INT E0/CL=8Fh,INT E0/CL=9Ch

Format of REAL/32 Abort Parameter Block:
Offset  Size    Description     (Table 04050)
 00h    WORD    process descriptor of process to abort, or 0000h
 02h    WORD    termination code
 04h    BYTE    default console number
 05h    BYTE    reserved (0)
 06h  8 BYTEs   name of process to abort, if descriptor at offset 00h is 0000h
--------O-E0----CL9E-------------------------
INT E0 - REAL/32 - "L_ATTACH" - ATTACH TO DEFAULT LIST DEVICE
        CL = 9Eh
Return: AX = status
        may destroy SI,DI
SeeAlso: INT E0/CL=92h,INT E0/CL=9Fh,INT E0/CL=A0h,INT E0/CL=A1h
--------O-E0----CL9F-------------------------
INT E0 - REAL/32 - "L_DETACH" - DETACH FROM DEFAULT LIST DEVICE
        CL = 9Fh
Return: AX = status
        may destroy SI,DI
SeeAlso: INT E0/CL=92h,INT E0/CL=9Eh
--------O-E0----CLA0-------------------------
INT E0 - REAL/32 - "L_SET" - SET DEFAULT LIST DEVICE
        CL = A0h
        DX = ID of list (printer) device
Return: AX = status (0000h success, FFFFh if invalid printer number)
        may destroy SI,DI
SeeAlso: INT E0/CL=92h,INT E0/CL=9Eh,INT E0/CL=A4h
--------O-E0----CLA1-------------------------
INT E0 - REAL/32 - "L_CATTACH" - CONDITIONALLY ATTACH TO DEFAULT LIST DEVICE
        CL = A1h
Return: AX = status (00h = successful, FFh = unable to attach)
        may destroy SI,DI
Desc:   attach the default list device to the calling process only if it is
          currently available
SeeAlso: INT E0/CL=92h,INT E0/CL=9Eh,INT E0/CL=A0h
--------O-E0----CLA2-------------------------
INT E0 - REAL/32 - "C_CATTACH" - CONDITIONALLY ATTACH TO DEFAULT CONSOLE
        CL = A2h
Return: AL = status (FFh = console attached to another process)
Note:   if the console is currently owned by another process, this function
          will return an error code instead of attaching or waiting
SeeAlso: INT E0/CL=93h,INT E0/CL=94h,INT E0/CL=99h,INT E0/CL=92h
--------O-E0----CLA3-------------------------
INT E0 - ConcCP/M,DR Multiuser DOS,REAL/32 - "S_OSVER" - GET OS VERSION
        CL = A3h
Return: AX = operating system version (see #04023) (see also INT 21/AX=4451h)
SeeAlso: INT E0/CL=0Ch,INT 21/AX=4451h
--------O-E0----CLA4-------------------------
INT E0 - REAL/32 - "L_GET" - GET DEFAULT LIST (PRINTER) DEVICE
        CL = A4h
Return: AL = number of default list device
SeeAlso: INT E0/CL=A0h
--------O-E0----CLA5-------------------------
INT E0 - DR Multiuser DOS - "A_ATTACH" - ATTACH AUX DEVICE
        CL = A5h
Return: nothing (DR)
        AX = status (REAL/32)
Desc:   attaches the default auxiliary device to the calling process unless
          it is already attached to another process, in which case the call
          blocks until the device becomes available
Notes:  this call should be used before attempting to read or write from
          the AUX device; however, the I/O calls internally call this function
          to ensure device ownership
        also supported by REAL/32
SeeAlso: INT E0/CL=03h,INT E0/CL=04h,INT E0/CL=A6h,INT E0/CL=A7h,INT E0/CL=A8h
SeeAlso: INT E0/CL=ACh,INT E0/CL=ADh,INT E0/CL=B0h
--------O-E0----CLA6-------------------------
INT E0 - DR Multiuser DOS - "A_DETACH" - DETACH FROM AUX DEVICE
        CL = A6h
Return: AX = status
            0000h successfully detached
            FFFFh detach failed
        CX = error code
Note:   also supported by REAL/32
SeeAlso: INT E0/CL=93h,INT E0/CL=A5h,INT E0/CL=A7h
--------O-E0----CLA7-------------------------
INT E0 - DR Multiuser DOS - "A_CATTACH" - CONDITIONALLY ATTACH TO AUX DEVICE
        CL = A7h
Return: AX = status
            0000h attached
            FFFFh unable to attach
Desc:   attaches the default auxiliary device to the calling process if it is
          available
Notes:  does not block if the device is already in use
        also supported by REAL/32
SeeAlso: INT E0/CL=A5h,INT E0/CL=A6h,INT E0/CL=A8h,INT E0/CL=B0h
--------O-E0----CLA8-------------------------
INT E0 - DR Multiuser DOS - "A_SET" - SET DEFAULT AUX DEVICE NUMBER
        CL = A8h
        DL = auxiliary device number
Return: AX = status
            0000h successful
            FFFFh failed
        CX = error code
Desc:   specify which physical device will become AUX
SeeAlso: INT E0/CL=A5h,INT E0/CL=A9h
--------O-E0----CLA9-------------------------
INT E0 - DR Multiuser DOS - "A_GET" - GET DEFAULT AUX DEVICE NUMBER
        CL = A9h
Return: AL = current default auxiliary device number
Desc:   determine which physical device is currently AUX
SeeAlso: INT E0/CL=A8h
--------O-E0----CLAC-------------------------
INT E0 - DR Multiuser DOS - "A_READBLK" - READ STRING FROM AUX DEVICE
        CL = ACh
        DS:DX -> character control block (CHCB) (see #04051,#04052)
Return: AX = number of characters read
Desc:   read characters from the default auxiliary (AUXn:) device into a buffer
          until the buffer is full or the device is no longer ready
Notes:  if the device is initially not ready, blocks until at least one
          character has been read
        if another process owns AUX, this call blocks until the device becomes
          available
        also supported by REAL/32
SeeAlso: INT E0/CL=03h,INT E0/CL=A5h,INT E0/CL=ADh

Format of DR Multiuser DOS character control block (CHCB):
Offset  Size    Description     (Table 04051)
 00h    DWORD   pointer to character buffer
 04h    WORD    length of character buffer
Note:   this version of the structure is used by REAL/32 in real mode
SeeAlso: #04059

Format of REAL/32 protected-mode Character Control Block (CHCB):
Offset  Size    Description     (Table 04052)
 00h    DWORD   32-bit offset of character buffer
 04h    WORD    selector for character buffer
 06h    WORD    length of character buffer
SeeAlso: #04051
--------O-E0----CLAD-------------------------
INT E0 - DR Multiuser DOS - "A_WRITEBLK" - WRITE STRING TO AUX DEVICE
        CL = ADh
        DS:DX -> character control block (see #04051,#04052)
Return: AX = number of characters written
Notes:  does not return until at least one character has been written
        also supported by REAL/32
SeeAlso: INT E0/CL=04h,INT E0/CL=A5h,INT E0/CL=ACh
--------O-E0----CLB0-------------------------
INT E0 - DR Multiuser DOS - "A_CONFIG" - GET/SET AUX DEVICE PARAMETERS
        CL = B0h
        DX:DX -> AUX device parameter block (see #04053)
Return: AX = status
            0000h successful
                parameter block updated
            FFFFh failed
                CX = error code
Note:   also supported by REAL/32
SeeAlso: INT E0/CL=A5h,INT E0/CL=B1h

Format of DR Multiuser DOS AUX device parameter block:
Offset  Size    Description     (Table 04053)
 00h    BYTE    function (00h get, 01h set)
 01h    BYTE    baud rate (see #04055) FFh = don't change/unknown
 02h    BYTE    parity (see #04054)
 03h    BYTE    stop bits (00h one, 01h 1.5, 02h two, FFh unknown/don't change)
 04h    BYTE    data bits (05h-08h or FFh unknown/don't change)
 05h    BYTE    handshake (00h none, 01h DTS/DSR, 02h RTS/CTS, 04h XON/XOFF,
                FFh unknown/don't change)
 06h    BYTE    XON character, FFh unknown/don't change
 07h    BYTE    XOFF character, FFh unknown/don't change

(Table 04054)
Values for DR Multiuser DOS AUX parity:
 00h    none
 01h    odd
 02h    none
 03h    even
 04h    stick parity bit
 FFh    don't change/unknown
SeeAlso: #04053,#04055

(Table 04055)
Values for DR Multiuser DOS AUX baud rate:
 00h    50 baud
 01h    62.5 baud
 02h    75 baud
 03h    110 baud
 04h    134.5 baud
 05h    150 baud
 06h    200 baud
 07h    300 baud
 08h    600 baud
 09h    1200 baud
 0Ah    1800 baud
 0Bh    2000 baud
 0Ch    2400 baud
 0Dh    3600 baud
 0Eh    4800 baud
 0Fh    7200 baud
 10h    9600 baud
 11h    19200 baud
 12h    38400 baud
 13h    56000 baud
 14h    76800 baud
 15h    115200 baud
SeeAlso: #04053,#04054
--------O-E0----CLB1-------------------------
INT E0 - DR Multiuser DOS - "A_CONTROL" - GET/SET AUX CONTROL PARAMETERS
        CL = B1h
        DS:DX -> AUX device control block (see #04056)
Return: AX = status
            0000h successful
                control block updated
            FFFFh failed
                CX = error code
Note:   also supported by REAL/32
SeeAlso: INT E0/CL=B0h,INT E0/CL=B2h

Format of DR Multiuser DOS AUX device control block:
Offset  Size    Description     (Table 04056)
 00h    BYTE    function (00h get, 01h set)
 01h    BYTE    DTR state (00h low, 01h high, FFh unknown/don't change)
 02h    BYTE    RTS state (00h low, 01h high, FFh unknown/don't change)
 03h    BYTE    DSR state (00h low, 01h high, FFh unknown/don't change)
 04h    BYTE    CTS state (00h low, 01h high, FFh unknown/don't change)
 05h    BYTE    DCD state (00h low, 01h high, FFh unknown/don't change)
 06h    BYTE    RI state (00h inactive, 01h active, FFh unknown/don't change)
--------O-E0----CLB2-------------------------
INT E0 - DR Multiuser DOS - "A_BREAK" - SEND BREAK TO AUX DEVICE
        CL = B2h
        DX = duration of break in system ticks (0001h-FFFFh)
Return: AX = status
            0000h successful
                break signal completed
            FFFFh failed
                CX = error code
Notes:  if the AUX device is currently owned by another process, this call will
          block until the device becomes available
        also supported by REAL/32
SeeAlso: INT E0/CL=A5h,INT E0/CL=B1h
--------O-E0----CLB3-------------------------
INT E0 R - REAL/32 - "MP_ALLOC" - ALLOCATE PHYSICAL MEMORY
        CL = B3h
        DX = number of 4K pages to allocate
Return: AX = number of first 4K page allocated, or FFFFh on error
Note:   memory allocated with this function is not automatically freed when
          the process terminates
SeeAlso: INT E0/CL=B4h,INT E0/CL=B5h
--------O-E0----CLB4-------------------------
INT E0 R - REAL/32 - "MP_FREE" - DEALLOCATE PHYSICAL MEMORY
        CL = B4h
        DX = number of the physical page to free
Return: AX = status (0000h successful, FFFFh error)
SeeAlso: INT E0/CL=B3h
--------O-E0----CLB5-------------------------
INT E0 R - REAL/32 - "MP_MAP" - MAP PHYSICAL MEMORY
        CL = B5h
        DS:DX -> Memory Physical Parameter Block (see #04057)
Return: AX = status (0000h successful, FFFFh error)
        may destroy SI,DI,DS
SeeAlso: INT E0/CL=B3h

Format of REAL/32 Memory Physical Parameter Block:
Offset  Size    Description     (Table 04057)
 00h    WORD    4K page number in first megabyte to be mapped
 02h    WORD    number of page to map into above page, or 0000h to unmap
 04h    WORD    window number (0000h, as only one window currently supported)
 06h    WORD    reserved
Note:   all users of the system share the window, so applications should not
          use it for arguments to system calls, attempt to read/write to/from
          files via the window, etc.
--------O-E0----CLB6-------------------------
INT E0 - REAL/32 - "Q_NCREAD" - CONDITIONALLY NONDESTRUCTIVELY READ QUEUE
        CL = B6h
        DS:DX -> Queue Parameter Block (QPB) (see #04045,#04044)
Return: AX = status
SeeAlso: INT E0/CL=89h,INT E0/CL=8Ah
--------O-E0----CLB7-------------------------
INT E0 - REAL/32 - "DEV_TWAITFLAG" - TIMED WAIT ON SYSTEM FLAG
        CL = B7h
        DS:DX -> Flag Parameter Block (FPB) (see #04058)
Return: AX = status
        may destroy SI,DI,DS
Note:   if the flag was already set, this function returns immediately
SeeAlso: INT E0/CL=84h,INT E0/CL=85h

Format of REAL/32 Flag Parameter Block (FPB):
Offset  Size    Description     (Table 04058)
 00h    WORD    number of system flag on which to wait
 02h    WORD    maximum number of system ticks (see INT E0/CL=9Ah) to wait
--------O-E0----CLB8-------------------------
INT E0 - REAL/32 - "DEV_MAP" - GET/SET SERIAL/PARALLEL PORT MAPPINGS
        CL = B8h
        DS:DX -> Device Map Parameter Block (DEVPB) (see #04059)
Return: nothing???
        may destroy SI,DI,DS

Format of REAL/32 Device Map Parameter Block (DEVPB):
Offset  Size    Description     (Table 04059)
 00h    WORD    direction (00h = get current mapping, 01h = set new mapping)
 02h  4 BYTEs   physical device IDs which map into LPT1 - LPT4
 06h  4 BYTEs   physical device IDs which map into COM1 - COM4
Note:   LPT4 and COM3/COM4 are reserved on early versions of Multiuser DOS,
          but are supported from at least CCI Multiuser DOS v7.22 onward
--------O-E0----CLB9-------------------------
INT E0 - REAL/32 - "L_TIMEOUT" - SET LIST DEVICE TIMEOUT
        CL = B9h
        DX = timeout value in system ticks (see #04048)
                0000h-FFEFh = new number of system ticks
                FFFDh = get current value without changing
                FFFEh = start timeout count
                FFFFh = never timeout
Return: AX = status, or current timeout value if DX=FFFDh on entry
        may destroy SI,DI
SeeAlso: INT E0/CL=BAh
--------O-E0----CLBA-------------------------
INT E0 - REAL/32 - "A_TIMEOUT" - SET AUX DEVICE TIMEOUT
        CL = BAh
        DX = timeout value in system ticks (see #04048)
                0000h-FFEFh = new number of system ticks
                FFFDh = get current value without changing
                FFFEh = start timeout count
                FFFFh = never timeout
Return: AX = status, or current timeout value if DX=FFFDh on entry
        may destroy SI,DI
SeeAlso: INT E0/CL=B9h
--------O-E0----CLBD-------------------------
INT E0 - DR Multiuser DOS - "P_DELAY" - DELAY EXECUTION
        CL = BDh
        DX = delay in system ticks (typically 16.6 ms/tick)
Return: after the delay elapses
        no results
Notes:  the length of a system tick is installation-dependent (typically
          1/50 or 1/60 second); the length may be determined by reading the
          TICKSPERSEC value from the system data segment
        the actual delay before the process is rescheduled to run may be up to
          one tick longer than requested; the delay between rescheduling and
          actual execution cannot be predicted if higher-priority processes
          are awaiting a turn at the CPU
SeeAlso: INT 15/AH=86h,INT 1A/AX=FF01h,INT 2F/AX=1224h,INT 62/AX=0096h
--------g-E00000-----------------------------
INT E0 - PCROBOTS v1.41 - "SWAPTASK" - END CURRENT ROBOT'S TURN
        AX = 0000h
Return: nothing
Program: PCROBOTS is P.D. Smith's adaptation of Tom Poindexter's CROBOTS, in
          which specially-written .COM or .EXE programs form robots battling
          each other in a user-defined arena
--------g-E00001-----------------------------
INT E0 - PCROBOTS v1.41 - "MOVEMENT" - START MOVING
        AX = 0001h
        BX = speed (0-maximum for robot)
        CX = direction (0-359 degrees)
Return: nothing
Notes:  the speed will change to the specified value at the maximum
          acceleration the robot is capable of; if the robot is already moving
          faster than its maximum maneuverability speed, it will not be able
          to change direction
        this call also terminates the current robot's turn
SeeAlso: AX=0000h,AX=0002h,AX=0003h
--------g-E00002-----------------------------
INT E0 - PCROBOTS v1.41 - "SCAN" - SCAN FOR OTHER ROBOTS IN THE GIVEN DIRECTION
        AX = 0002h
        BX = direction (0-359 degrees)
        CX = resolution (0-45 degrees)
Return: AX = status
            FFFFh if nothing detected
            else robot ID (0-19)
                BX = range to detected robot
Notes:  the scan searches within CX degrees to either side of the specified
          direction
        the scanner will see right through walls, but shells will not pass
          through walls
        this call also terminates the current robot's turn
SeeAlso: AX=0000h,AX=0001h,AX=0003h
--------g-E00003-----------------------------
INT E0 - PCROBOTS v1.41 - "SHOOT" - FIRE A SHELL AT ANOTHER ROBOT
        AX = 0003h
        BX = direction (0-359 degrees)
        CX = range (0-700)
Return: AX = status (0000h not fired, else ID of shell fired)
Notes:  up to seven shells may be in flight for a robot at one time; the cannon
          takes 50 ticks to reload
        this call also terminates the current robot's turn
SeeAlso: AX=0000h,AX=0001h,AX=0002h,AX=002Ch
--------g-E00010-----------------------------
INT E0 - PCROBOTS v1.41 - "GETXY" - GET ROBOT'S CURRENT POSITION
        AX = 0010h
Return: BX = current X coordinate (0-999)
        CX = current Y coordinate (0-999)
--------g-E00011-----------------------------
INT E0 - PCROBOTS v1.41 - "TRANSMIT" - SEND DATA TO ANOTHER ROBOT
        AX = 0011h
        BX = target robot ID
        CX = data to be sent
Return: AX = status (0000h data could not be sent, 0001h data sent)
Note:   this call costs one unit of battery power
--------g-E00012-----------------------------
INT E0 - PCROBOTS v1.41 - "RECEIVE" - GET DATA FROM OTHER ROBOTS
        AX = 0012h
Return: AX = status
            0000h no data available
            0001h data retrieved
                BX = sender's ID
                CX = data
Note:   each robot has a 20-word receive FIFO; if the FIFO is full, other
          robots will be unable to send more data until some is read
--------g-E00013-----------------------------
INT E0 - PCROBOTS v1.41 - "DAMAGE" - DETERMINE HOW MUCH DAMAGE SUSTAINED
        AX = 0013h
Return: BX = damage status
Note:   the initial value depends on configuration, but is typically 100; as
          the robot is damaged, it decreases
--------g-E00014-----------------------------
INT E0 - PCROBOTS v1.41 - "SPEED" - DETERMINE HOW FAST ROBOT IS MOVING
        AX = 0014h
Return: BX = current speed
--------g-E00015-----------------------------
INT E0 - PCROBOTS v1.41 - "BATTERY" - DETERMINE HOW MUCH BATTERY POWER LEFT
        AX = 0015h
Return: BX = current battery charge
Note:   the battery starts off with 1000 units of charge, and is constantly
          being charged by solar panels and constantly discharged by motion;
          the battery is charged at 4 units per turn and discharged at
          0.1*speed units per turn.
--------g-E00016-----------------------------
INT E0 - PCROBOTS v1.41 - "TICKS" - DETERMINE HOW LONG SINCE GAME STARTED
        AX = 0016h
Return: BX:CX = number of game ticks elapsed (not related to real time)
--------g-E00017-----------------------------
INT E0 - PCROBOTS v1.41 - "L_SIN" - GET SCALED SINE OF AN ANGLE
        AX = 0017h
        BX = angle (0-359 degrees)
Return: BX:CX = 100000*sine of angle
SeeAlso: AX=0018h,AX=0019h,AX=001Ah,AX=001Bh
--------g-E00018-----------------------------
INT E0 - PCROBOTS v1.41 - "L_COS" - GET SCALED COSINE OF AN ANGLE
        AX = 0018h
        BX = angle (0-359 degrees)
Return: BX:CX = 100000*cosine of angle
SeeAlso: AX=0017h,AX=0019h,AX=001Ah
--------g-E00019-----------------------------
INT E0 - PCROBOTS v1.41 - "L_TAN" - GET SCALED TANGENT OF AN ANGLE
        AX = 0019h
        BX = angle (0-359 degrees)
Return: BX:CX = 100000*tangent of angle
SeeAlso: AX=0017h,AX=0018h,AX=001Ah
--------g-E0001A-----------------------------
INT E0 - PCROBOTS v1.41 - "L_ATAN" - GET ANGLE GIVEN SCALED TANGENT
        AX = 001Ah
        BX:CX = 100000*tangent of an angle
Return: AX = angle (-90 to +90 degrees)
SeeAlso: AX=0017h,AX=0018h,AX=0019h
--------g-E0001B-----------------------------
INT E0 - PCROBOTS v1.41 - "SQRT" - DETERMINE SQUARE ROOT OF A NUMBER
        AX = 001Bh
        BX:CX = value
Return: BX:CX = square root
SeeAlso: AX=0017h
--------g-E0001C-----------------------------
INT E0 - PCROBOTS v1.41 - "SET_PATTERN" - SPECIFY ROBOT'S DISPLAY IMAGE
        AX = 001Ch
        BX:CX -> pattern array
Return: nothing
Note:   the pattern array consists of five bytes, the low five bits of each
          specifying the bit pattern for one line of the robot's screen display
--------g-E0001D-----------------------------
INT E0 - PCROBOTS v1.41 - "DEBUG_FLAG" - SET/CLEAR MARKERS NEXT TO ROBOT'S NAME
        AX = 001Dh
        BX = flag number (0 or 1)
        CX = new value (0 reset, 1 set)
Return: nothing
Program: PCROBOTS is P.D. Smith's adaptation of Tom Poindexter's CROBOTS, in
          which specially-written .COM or .EXE programs form robots battling
          each other in a user-defined arena
Note:   the two flag markers may be used for any purpose, typically for
          debugging to provide a visual display of progress
--------g-E0001E-----------------------------
INT E0 - PCROBOTS v1.41 - "BUY_ARMOUR" - BUY OR SELL ARMOR FOR ROBOT
        AX = 001Eh
        BX = number of armor units to buy (negative to sell)
Return: nothing
Note:   each armor unit is worth 50 battery units; the robot's armor rating
          will not go above its initial rating, so attempts to purchase more
          will waste battery units
SeeAlso: AX=001Fh
--------g-E0001F-----------------------------
INT E0 - PCROBOTS v1.41 - "BUY_SHELLS" - BUY ADDITIONAL CANNON SHELLS
        AX = 001Fh
        BX = number of shells to buy
Return: nothing
Note:   each shell costs ten battery units
SeeAlso: AX=001Eh,AX=0020h
--------g-E00020-----------------------------
INT E0 - PCROBOTS v1.41 - "SHELLS LEFT" - DETERMINE HOW MANY SHELLS ROBOT HAS
        AX = 0020h
Return: BX = number of shells remaining
SeeAlso: AX=001Fh
--------g-E00021-----------------------------
INT E0 - PCROBOTS v1.41 - "GET LOCAL MAP"
        AX = 0021h
        BX:CX -> 81-byte buffer for map (see #04060)
Return: buffer filled with 9x9 area of map centered on robot's position

(Table 04060)
Values for PCROBOTS map squares:
 2Eh '.' empty square
 44h 'D' damaging trap
 52h 'R' refueling point
 58h 'X' wall
--------g-E00022-----------------------------
INT E0 - PCROBOTS v1.41 - "INVISIBILITY" - CONTROL ROBOT'S INVISIBILITY DEVICE
        AX = 0022h
        BX = new state (0000h become visible, 0001h become invisible)
Return: nothing
Notes:  this function has no effect if the robot is not capable of invisibility
        the robot can only stay invisible for 100 turns, after which it will
          automatically become visible; it must also be remain visible for
          as many turns as it was invisible before it can turn invisible
          again
SeeAlso: AX=0024h,AX=0080h
--------g-E00023-----------------------------
INT E0 - PCROBOTS v1.41 - "GET_SHELL_STATUS" - FIND OUT WHAT HAPPENED TO SHELL
        AX = 0023h
Return: BX = status of last shell to land
            0000h missed completely
            0001h hit a wall
            0002h hit a robot within 50-square radius
            0003h hit a robot within 25-square radius
            0004h hit a robot within 5-square radius
--------g-E00024-----------------------------
INT E0 - PCROBOTS v1.41 - "IS_INVISIBLE" - DETERMINE WHETHER ROBOT IS INVISIBLE
        AX = 0024h
Return: BX = visibility (0000h visible, 0001h invisible)
SeeAlso: AX=0022h,AX=0080h
--------g-E00025-----------------------------
INT E0 - PCROBOTS v1.41 - "L_ATAN2" - GET ARCTANGENT
        AX = 0025h
        BX = Y
        CX = X
Return: AX = angle (arctangent of Y/X)
--------g-E00026-----------------------------
INT E0 - PCROBOTS v1.41 - "GET_ROBOT_ID" - DETERMINE CURRENT ROBOT'S IDENTIFIER
        AX = 0026h
Return: AX = robot ID
--------g-E00027-----------------------------
INT E0 - PCROBOTS v1.41 - "REGISTER_IFF" - REGISTER FRIEND/FOE IDENT STRING
        AX = 0027h
        BX:CX = ASCIZ IFF string
Return: nothing
Note:   the IFF string may only be set once
SeeAlso: AX=0028h,AX=0029h
--------g-E00028-----------------------------
INT E0 - PCROBOTS v1.41 - "CHECK_IFF" - QUERY FRIEND/FOE IDENTIFICATION STRING
        AX = 0028h
        BX = robot ID to test
Return: AX = status
            0000h IFF strings match
            0001h IFF strings differ or invalid robot ID
SeeAlso: AX=0027h
--------g-E00029-----------------------------
INT E0 - PCROBOTS v1.41 - "REGISTER_NAME" - SPECIFY ROBOT'S NAME
        AX = 0029h
        BX:CX -> ASCIZ name string
Return: nothing
Note:   the name may only be set once
SeeAlso: AX=0027h,AX=002Ah
--------g-E0002A-----------------------------
INT E0 - PCROBOTS v1.41 - "FIND_NAME" - SEARCH FOR ROBOT WITH GIVEN NAME
        AX = 002Ah
        BX:CX -> ASCIZ name string
        DX = first ID to check
Return: AX = robot ID or FFFFh if no robot with specified name
SeeAlso: AX=0028h,AX=0029h,AX=002Bh
--------g-E0002B-----------------------------
INT E0 - PCROBOTS v1.41 - "GET_TEAM_ID" - DETERMINE TEAM MEMBERSHIP OF ROBOT
        AX = 002Bh
Return: AX = team ID (0-2) or FFFFh if 'loner'
SeeAlso: AX=0029h
--------g-E0002C-----------------------------
INT E0 - PCROBOTS v1.41 - "GET_ASHELL_STATUS" - FIND OUT WHAT HAPPENED TO SHELL
        AX = 002Ch
        BX = shell ID
Return: AX = status
            0000h missed completely
            0001h hit a wall
            0002h hit a robot within a 50-square radius
            0003h hit a robot within a 25-square radius
            0004h hit a robot within a 5-square radius
            0005h shell not known (too old or not yet fired)
            0006h shell still in flight
SeeAlso: AX=0003h
--------g-E0002D-----------------------------
INT E0 - PCROBOTS v1.41 - "REGISTER_X" - SELECT AUTOMATIC X POSITION UPDATES
        AX = 002Dh
        BX:CX -> X word variable
Return: AX = status (0001h OK, 0000h problem with address)
Note:   after this call, PCROBOTS will automatically update the specified
          word whenever the robot moves
SeeAlso: AX=002Eh
--------g-E0002E-----------------------------
INT E0 - PCROBOTS v1.41 - "REGISTER_Y" - SELECT AUTOMATIC Y POSITION UPDATES
        AX = 002Eh
        BX:CX -> Y word variable
Return: AX = status (0001h OK, 0000h problem with address)
Note:   after this call, PCROBOTS will automatically update the specified
          word whenever the robot moves
SeeAlso: AX=002Dh
--------g-E00080-----------------------------
INT E0 - PCROBOTS v1.41 - "CONFIGURE" - CUSTOMIZE ROBOT
        AX = 0080h
        BX = basic configuration (see #04061)
        CX = advanced configuration (see #04062)
Return: AX = status (0001h OK, 0000h not first call in program)
Program: PCROBOTS is P.D. Smith's adaptation of Tom Poindexter's CROBOTS, in
          which specially-written .COM or .EXE programs form robots battling
          each other in a user-defined arena
Notes:  a maximum of ten points may be allocated to the robot; if you attempt
          to allocate more, some items will be given a value of zero.  If this
          function is not called, each attribute is set to the default value
          of 2.
        if the invisibility option is chosen, the robot will start with only
          900 cannon shells instead of the default 1000

Bitfields for PCROBOTS basic configuration:
Bit(s)  Description     (Table 04061)
 0-3    maximum speed (0-4 = 50,75,100,150,200)
 4-7    maneuverability (0-4 = 20%,35%,50%,75%,100%)
 8-11   cannon range (0-4 = 300,500,700,1000,1500)
 12-15  robot armor (0-4 = 50,75,100,150,200)

Bitfields for PCROBOTS advanced configuration:
Bit(s)  Description     (Table 04062)
 0-2    robot acceleration (0-4 = 5,7,10,15,20)
 3      capable of invisibility
--------r-E1---------------------------------
INT E1 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------N-E1---------------------------------
INT E1 - PC Cluster Disk Server Information (NOT A VECTOR!)
Desc:   points at a data table
SeeAlso: INT E2
--------O-E1---------------------------------
INT E1 - MP/M-86, - ALTERNATE CP/M-86 FUNCTION CALLS
        CL = function number (see #04019,#04020)
        DS,DX = parameters
Return: as appropriate for function
        CX is often the error code (see #04021)
Desc:   used by some applications which alter CP/M functions while running a
          child program, to store the original INT E0 vector before
          intercepting INT E0
SeeAlso: #04019 at INT E0"CP/M"
----------E1---------------------------------
INT E1 - DeskMate (Tandy) - TASK DATA SEGMENTS (NOT A VECTOR!)
Desc:   used to store data; the low word of the vector is the data segment for
          the first task; the high word is the data segment of the second task
          (DeskMate supports 2-way task switching between small- or
          medium-model applications)
Program: DeskMate is a proprietary GUI from Tandy distributed with several
          models of the Tandy 1000's, 2500's, 3000's, and laptops.  Retail
          and runtime versions also exist.  Some Tandy's are designed to
          boot directly into DeskMate.
SeeAlso: INT E0"DeskMate"
--------r-E2---------------------------------
INT E2 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------N-E2---------------------------------
INT E2 - PC Cluster Program - RELOCATED INT 1C
SeeAlso: INT 1C
--------r-E3---------------------------------
INT E3 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-E40005-----------------------------
INT E4 - Logitech Modula v2.0 - MonitorEntry
        AX = 0005h
        BX = priority
Return: nothing
SeeAlso: AX=0006h
--------r-E40006-----------------------------
INT E4 - Logitech Modula v2.0 - MonitorExit
        AX = 0006h
Return: nothing
SeeAlso: AX=0005h
--------r-E4---------------------------------
INT E4 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-E5---------------------------------
INT E5 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-E6---------------------------------
INT E6 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------O-E6---------------------------------
INT E6 C - CP/M-86 v1.1 - UNKNOWN DISK DRIVE
        AX = function which accessed drive
            0000h SELDSK
            0001h READ
            0002h WRITE
            0003h HOME
        DX:BX -> parameter block (see #04063)
Return: AX = return value
Desc:   called by CP/M-86 kernel when an unknown disk drive is used, which
          permits an application to provide access services

Format of CP/M-86 unknown-drive paramter block:
Offset  Size    Description     (Table 04063)
 00h    BYTE    drive number (00h = first unknown drive, etc.)
 01h    BYTE    deblocking flag (00h = normal write, 01h = directory write)
 02h    WORD    track number
 04h    WORD    sector number
 06h    DWORD   data transfer address
 0Ah    BYTE    verify flag (nonzero to verify writes)
Note:   in CP/M-86 v1.1, this is actually a portion of a BIOS disk data
          table which starts one byte before the address given to the INT E6
          handler; that extra byte is the current logical drive number
--------O-E600-------------------------------
INT E6 - Linux DOSEMU - INSTALLATION CHECK
        AH = 00h
Return: AX = AA55h if installed
            BH = major version number
            BL = minor version number
            CX = patchlevel
Notes:  check for the BIOS date string "02/25/93" at F000:FFF5 before
          calling this function.  In addition, the segment address of this
          vector should be F000h (for existing versions of DOSemu, the
          vector is F000h:0E60h)
SeeAlso: AH=FFh
--------O-E601-------------------------------
INT E6 - Linux DOSEMU - REGISTER DUMP
        AH = 01h
Return: nothing
SeeAlso: AH=00h
--------O-E602-------------------------------
INT E6 - Linux DOSEMU - SET I/O PORT PERMISSIONS
        AH = 02h
        BX = base I/O port address
        CX = number of consecutive I/O ports
        CF set to allow DOS to use ports
        CF clear if DOS should not be allowed to use ports
Return: nothing
SeeAlso: AH=00h
--------O-E605-------------------------------
INT E6 - Linux DOSEMU - STARTUP BANNER
        AH = 05h
Return: nothing
SeeAlso: AH=00h
--------O-E612-------------------------------
INT E6 - Linux DOSEMU - SET "HOGTHRESHOLD"
        AH = 12h
        BX = new "hogthreshold" (00h-99h)
Return: nothing
Desc:   specify how much CPU time DOSEMU may use
SeeAlso: AH=00h
--------O-E622-------------------------------
INT E6 - Linux DOSEMU - GET EMS STATUS
        AH = 22h
Return: ???
SeeAlso: AH=00h
--------O-E630-------------------------------
INT E6 - Linux DOSEMU - SET BOOTDISK FLAG
        AH = 30h
        BX = new flag state (0 = false, 1 = true)
Return: nothing
SeeAlso: AH=00h
--------O-E650-------------------------------
INT E6 - Linux DOSEMU - EXECUTE UNIX COMMAND
        AH = 50h
        ES:DX -> ASCIZ Unix command
SeeAlso: AH=00h,AH=51h
--------O-E651-------------------------------
INT E6 - Linux DOSEMU - EXECUTE DOS COMMAND FROM UNIX
        AH = 51h
        ES:DX -> ASCIZ DOS command
SeeAlso: AH=00h,AH=50h
--------O-E680-------------------------------
INT E6 - Linux DOSEMU - GET CURRENT UNIX DIRECTORY
        AH = 80h
Return: ES:DX -> current Unix directory
        AX = length of current directory name
SeeAlso: AH=00h,AH=81h
--------O-E681-------------------------------
INT E6 - Linux DOSEMU - CHANGE CURRENT UNIX DIRECTORY
        AH = 81h
        ES:DX -> ASCIZ directory name
Return: nothing
SeeAlso: AH=00h,AH=80h
--------O-E6FF-------------------------------
INT E6 - Linux DOSEMU - TERMINATE
        AH = FFh
SeeAlso: AH=00h
--------r-E7---------------------------------
INT E7 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-E8---------------------------------
INT E8 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-E9---------------------------------
INT E9 - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-EA---------------------------------
INT EA - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-EB---------------------------------
INT EB - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------r-EC---------------------------------
INT EC - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC
        BASIC.COM/BASICA.COM do not restore vector on termination
--------N-EC---------------------------------
INT EC - used by Alloy NTNX
--------r-EC---------------------------------
INT EC - Exact - RUNTIME INTERFACE MULTIPLEXOR
        AX = function number (0000h to 0140h)
        STACK:  DWORD address to return to
                any arguments required by function
Return: STACK:  return address popped, but otherwise unchanged
Desc:   this is the interface from applications to the runtime system by Exact
          Automatisering B.V. of the Netherlands.  By using this interrupt,
          it can provide DLL-style capabilities under MS-DOS.
Note:   the interrupt handler removes the return address and flags placed on
          the stack by the INT EC, then jumps to the appropriate function
--------r-ED---------------------------------
INT ED - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
        INT 80 through INT ED are modified but not restored by Direct Access
          v4.0, and may be left dangling by other programs written with the
          same version of compiled BASIC
SeeAlso: INT EC"BASIC",INT EE"BASIC"
--------r-EE---------------------------------
INT EE - IBM ROM BASIC - used while in interpreter
Notes:  called by ROM BASIC, but pointed at IRET by BASIC.COM/BASICA.COM
        BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT ED"BASIC",INT EE"BASIC"
--------r-EF---------------------------------
INT EF - BASIC - ORIGINAL INT 09 VECTOR
Note:   BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT EE"BASIC",INT F0"BASIC"
--------O-EF----CX00C8-----------------------
INT EF - GEM - AES INTERFACE
        CX = 00C8h
        DX = 0000h
        ES:BX -> AES parameter block (see #04064)
SeeAlso: INT EF/CX=00C9h,INT EF/CX=0473h

Format of AES parameter block:
Offset  Size    Description     (Table 04064)
 00h    DWORD   -> control array (see #04065)
 04h    DWORD   -> global variables (15 WORDs)
 08h    DWORD   -> integer input parameters
 0Ch    DWORS   -> buffer for integer results
 10h    DWORD   -> address (DWORD) input parameters
 14h    DWORD   -> buffer for address (DWORD) results
SeeAlso: #04066

Format of AES control array:
Offset  Size    Description     (Table 04065)
 00h    WORD    function number (000Ah-0084h)
 02h    WORD    number of words of integer input parameters
 04h    WORD    number of words available for integer results
 06h    WORD    number of words of address input parameters
 08h    WORD    number of words available for address results
SeeAlso: #04064
--------O-EF----CX00C9-----------------------
INT EF - GEM - AES INTERFACE
        CX = 00C9h
        DX = 0000h
        ES:BX -> AES parameter block (see #04064)
SeeAlso: INT EF/CX=00C8h,INT EF/CX=0473h
--------O-EF----CX0473-----------------------
INT EF - GEM - VDI INTERFACE
        CX = 0473h
        DS:DX -> GEM VDI parameter block (see #04066)
Note:   if installed, one of the following ASCII signatures will appear two
          bytes after the INT EF entry point:
            "GEMVDI"    GEM VDI (but not AES) is present
            "GEMAES"    GEM/ViewMAX VDI and AES are both present
            "ViewMAX"   ViewMAX VDI (only) is present
          each of the above is followed by an ASCIZ number indicating the
          version ("10" for GEM/1 AES and VDI; "20" for GEM/2,GEM/3,ViewMAX
          AES and GEM/2 VDI; "23" for GEM/3 VDI; and "1" for ViewMAX VDIs)
SeeAlso: INT EF/CX=00C8h,INT EF/CX=00C9h
Index:  installation check;GEM

Format of VDI parameter block:
Offset  Size    Description     (Table 04066)
 00h    DWORD   -> control array (see #04067)
 08h    DWORD   -> integer parameters
 0Ch    DWORD   -> (x,y) pair parameters
 10h    DWORD   -> integer results
 14h    DWORD   -> (x,y) pair results
SeeAlso: #04064

Format of VDI control array:
Offset  Size    Description     (Table 04067)
 00h    WORD    (call) function number (0001h-0084h)
 02h    WORD    (call) number of words of pair parameters
 04h    WORD    (ret) number of words of pair results
 06h    WORD    (call) number of words of integer parameters
 08h    WORD    (ret) number of words of integer results
 0Ah    WORD    subfunction number
 0Ch    WORD    graphics handle
 0Eh    DWORD   (call) -> pointer parameter
 12h    DWORD   (ret) -> pointer result
SeeAlso: #04066
--------r-F0---------------------------------
INT F0 - BASICA.COM, GWBASIC, compiled BASIC - ORIGINAL INT 08 VECTOR
Note:   BASICA.COM does not restore vector on termination
SeeAlso: INT EF"BASIC"
--------*-F1---------------------------------
INT F1 - reserved for user interrupt
--------s-F1---------------------------------
INT F1 - SPEECH.COM - CONVERT TEXT STRING TO SPEECH
        DS:BX -> '$'-terminated text string
Return: nothing
Program: SPEECH.COM is a resident text-to-speech converter by Douglas Sisco
--------s-F1---------------------------------
INT F1 - Andy C. McGuire SPEECH.COM/SAY.COM
SeeAlso: INT F2"SPEECH"
--------U-F1---------------------------------
INT F1 - AQUEDUCT, PIPELINE - GET DATA AREA ADDRESS
Return: AX:BX -> data area
Program: AQUEDUCT and PIPELINE are TSRs by James W. Birdsall to connect COM1
          and COM2 in software
Note:   The installation check consists of testing for the following signature
          immediately preceding the interrupt handler: "JWBtvv" where 't' is
          either "A" for AQUEDUCT or "P" for PIPELINE and "vv" is a two-digit
          version number
Index:  installation check;AQUEDUCT|installation check;PIPELINE
--------N-F1---------------------------------
INT F1 - NetWare Remote Boot - INSTALLATION CHECK (NOT A VECTOR!)
Note:   if this vector contains the value 5774654Eh ("NetW"), the remote boot
          BIOS extension is active, and access to the floppy disk is redirected
          to an image file in the server's SYS:LOGIN directory
SeeAlso: INT F2"NetWare",INT F3"NetWare",INT F4"NetWare"
--------v-F1---------------------------------
INT F1 - VIRUS - "Violetta" - ???
Note:   used but not chained by virus
SeeAlso: INT E0"VIRUS",INT FF"VIRUS"
----------F101-------------------------------
INT F1 - Common ISDN API (CAPI) v1.1 - "API-REGISTER" - INITIALIZE CAPI
        AH = 01h
        ES:BX -> buffer for CAPI's use (refer to note below)
        CX = minimum number of pending messages
        DX = maximum simultaneous Level 3 connections
        SI = maximum concurrent received B3 data blocks
        DI = maximum B3 data block size
Return: AX = CAPI-assigned application ID
            0000h on error
                BX = error number
                    1001h registration error
Range:  INT 00 to INT FF, selectable by program parameter
Notes:  the caller is required to provide at least 512 bytes of stack space
        the CAPI interrupt handler begins with a header which is nearly
          identical to the IBM Interrupt Sharing Protocol header
          (see #02568 at INT 2D"AMIS"), except that the short jump instruction
          to a hardware reset handler at offset 09h is replaced by the
          signature bytes "IA"
        the maximum length of a message is fixed at 180 bytes; the standard
          document suggests using CX=10, DI=1, SI=7, and DI=130 for
          applications which use only a single connection and standard
          protocols
        the total size of the application-provided buffer must be at least
          180*CX + DX*SI*DI bytes
SeeAlso: AH=02h,INT F1/AL=01h
Index:  installation check;Common ISDN API
----------F1--01-----------------------------
INT F1 - Common ISDN API (CAPI) v2.0 - "CAPI_REGISTER" - INITIALIZE CAPI
        AL = 01h
        AH = CAPI version number * 10 (14h for v2.0)
        ES:BX -> buffer for CAPI's use (refer to note below)
        CX = number of bytes for message buffer
        DX = maximum simultaneous logical (Level 3) connections
        SI = maximum concurrent received B3 data blocks (min. 2)
        DI = maximum B3 data block size (up to 2048 bytes)
Return: AX = CAPI-assigned application ID
            0000h on error
                BX = error number
                    1001h registration error
Range:  INT 00 to INT FF, selectable by program parameter
Notes:  the caller is required to provide at least 512 bytes of stack space
        the CAPI interrupt handler begins with a header (see #04068) which is
          nearly identical to the IBM Interrupt Sharing Protocol header
          (see #02568 at INT 2D"AMIS"), except that the short jump instruction
          to a hardware reset handler at offset 09h is zeroed out and the
          entire header is inexplicably shortened by one byte
        the standard document suggests using 1024 + (1024*DX) bytes for the
          message buffer for typical applications
        the total size of the application-provided buffer must be at least
          CX + DX*SI*DI bytes
SeeAlso: AH=01h,INT F1/AL=02h
Index:  installation check;Common ISDN API

Format of CAPI v2.0 interrupt handler entry point:
Offset  Size    Description     (Table 04068)
 00h  2 BYTEs   short jump to actual start of interrupt handler, immediately
                  following this data block (EBh 0Fh)
 02h    DWORD   address of next handler in chain
 06h    WORD    signature 424Bh
 08h    BYTE    EOI flag (80h)
                80h primary hardware interrupt handler (will issue EOI)
 09h  2 BYTEs   reserved (0)
                (is short jump to hardware reset routine in ISP header)
 0Bh  4 BYTEs   signature "CAPI"
 0Fh  2 BYTEs   two-digit CAPI version number in ASCII ('20')
SeeAlso: #02568 at INT 2D
----------F102-------------------------------
INT F1 - Common ISDN API (CAPI) v1.1 - "API-RELEASE" - UNREGISTER FROM CAPI
        AH = 02h
        DX = application ID (see AH=01h)
Return: AX = status (0000h,1002h) (see #04069)
Notes:  the caller is required to provide at least 512 bytes of stack space
SeeAlso: AH=01h,INT F1/AL=02h

(Table 04069)
Values for CAPI v1.1 error code:
 0000h  successful
 1001h  registration error
 1002h  invalid application ID
 1003h  message too small or incorrectly coded message number
 1004h  invalid command or subcommand
 1005h  message queue full
 1006h  message queue empty
 1007h  message(s) lost due to queue overflow
 1008h  error uninstalling
SeeAlso: #04070
----------F1--02-----------------------------
INT F1 - Common ISDN API (CAPI) v2.0 - "CAPI_RELEASE" - UNREGISTER FROM CAPI
        AL = 02h
        AH = CAPI version number * 10 (14h for v2.0)
        DX = application ID (see INT F1/AL=01h)
Return: AX = status (0000h,11xxh) (see #04070)
Notes:  the caller is required to provide at least 512 bytes of stack space
SeeAlso: AH=02h,INT F1/AL=01h,INT F1/AL=03h

(Table 04070)
Values for CAPI v2.0 error code:
 0000h  successful
 1001h  too many applications
 1002h  logical block size too small (must be at least 128 bytes)
 1003h  buffer > 64K
 1004h  message buffer too small (minimum 1024 bytes)
 1005h  too many logical connections requested
 1006h  reserved
 1007h  could not register because CAPI busy, try again
 1008h  OS resource unavailable (out of memory, etc.)
 1009h  COMMON-ISDN-API not installed
 100Ah  controller does not support external equipment
 100Bh  controller supports only external equipment
 1101h  invalid application ID
 1102h  illegal command or subcommand, or message too short
 1103h  message queue full
 1104h  queue empty
 1105h  queue overflowed (message lost)
 1106h  unknown notification parameter
 1107h  could not accept message because CAPI busy, try again
 1108h  OS resource unavailable (out of memory, etc.)
 1109h  COMMON-ISDN-API not installed
 110Ah  controller does not support external equipment
 110Bh  controller supports only external equipment
 2001h  message not supported in current state
 2002h  illegal controller/PLCI/NCCI
 2003h  out of PLCI
 2004h  out of NCCI
 2005h  out of LISTEN
 2006h  out of FAX resources (T.30 protocol)
 2007h  illegal message parameter coding
 3001h  unsupported B1 protocol
 3002h  unsupported B2 protocol
 3003h  unsupported B3 protocol
 3004h  unsupported B1 protocol parameter
 3005h  unsupported B2 protocol parameter
 3006h  unsupported B3 protocol parameter
 3007h  unsupported B protocol combination
 3008h  NCPI not supported
 3009h  unknown CIP value
 300Ah  unsupported flags (reserved bits set)
 300Bh  unsupported facility
 300Ch  data length not supported by current protocol
 300Dh  reset procedure not supported by current protocol
SeeAlso: #04069
----------F103-------------------------------
INT F1 - Common ISDN API (CAPI) v1.1 - "API-PUT-MESSAGE"
        AH = 03h
        DX = application ID (see AH=01h)
        ES:BX -> message to be sent (see #04071)
Return: AX = status (0000h,1002h,1003h,1004h,1005h) (see #04069)
Notes:  the caller is required to provide at least 512 bytes of stack space
        the message buffer may be reused as soon as this call returns
SeeAlso: AH=01h,AH=04h,INT F1/AL=03h

Format of CAPI message:
Offset  Size    Description     (Table 04071)
 00h    WORD    total message length, including header
 02h    WORD    application ID (see AH=01h)
 04h    BYTE    command (see #04072,#04073)
 05h    BYTE    subcommand (see #04072,#04073)
 06h    WORD    message sequence number
                0000h-7FFFh messages from application to CAPI (and replies)
                8000h-FFFFh messages from CAPI to application (and replies)
 08h    var     message data (max 172 bytes for v1.1 only)

(Table 04072)
Values for CAPI v1.1 message command/subcommand:
Cmd/SubCmd      Name                    Description
 01h/00h    RESET-B3-REQ        request resetting of a Level 3 connection
 01h/01h    RESET-B3-CONF       confirm Level 3 connection reset
 01h/02h    RESET-B3-IND        indication from CAPI that Level 3 conn. reset
 01h/03h    RESET-B3-RESP       confirm receipt of RESET-B3-IND
 02h/00h    CONNECT-REQ         establish B-channel connection
 02h/01h    CONNECT-CONF        confirm start of connection establishment
 02h/02h    CONNECT-IND         indication from CAPI of incoming connection
 02h/03h    CONNECT-RESP        accept incoming connection
 03h/02h    CONNECT-ACTIVE-IND  indication that B-channel connection complete
 03h/03h    CONNECT-ACTIVE-RESP confirm connection-complete indication
 04h/00h    DISCONNECT-REQ      request shutdown of B-channel connection
 04h/01h    DISCONNECT-CONF     confirm shutdown of B-channel connection
 04h/02h    DISCONNECT-IND      indication that B-channel is shutting down
 04h/03h    DISCONNECT-RESP     confirm that application knows of shutdown
 05h/00h    LISTEN-REQ          enable indication of incoming connections
 05h/01h    LISTEN-CONF         confirm enabling of incoming conn. indication
 06h/00h    GET-PARAMS-REQ      request B-channel parameters
 06h/01h    GET-PARAMS-CONF     return B-channel parameters
 07h/00h    INFO-REQ            set B-channel info to be signalled to app
 07h/01h    INFO-CONF           confirm B-channel info signalling
 07h/02h    INFO-IND            signal B-channel events to application
 07h/03h    INFO-CONF           confirm receipt of INFO-IND
 08h/00h    DATA-REQ            send D-channel data
 08h/01h    DATA-CONF           confirm receipt of DATA-REQ
 08h/02h    DATA-IND            receive D-channel data
 08h/03h    DATA-RESP           confirm receipt fo DATA-IND
 09h/00h    CONNECT-INFO-REQ    request connection information
 09h/01h    CONNECT-INFO-CONF   return connection information
 40h/00h    SELECT-B2-PROTOCOL-REQ  select Level 2 protocol
 40h/01h    SELECT-B2-PROTOCOL-CONF confirm receipt of SELECT-B2-PROTOCOL-REQ
 80h/00h    SELECT-B3-PROTOCOL-REQ  select Level 3 protocol
 80h/01h    SELECT-B3-PROTOCOL-CONF confirm receipt of SELECT-B3-PROTOCOL-REQ
 81h/00h    LISTEN-B3-REQ       enable notification of incoming Level 3 calls
 81h/01h    LISTEN-B3-CONF      confirm receipt of LISTEN-B3-REQ
 82h/00h    CONNECT-B3-REQ      establish Level 3 connection
 82h/01h    CONNECT-B3-CONF     confirm start of connection establishment
 82h/02h    CONNECT-B3-IND      indication of incoming Level 3 connection
 82h/03h    CONNECT-B3-RESP     accept incoming connection
 83h/02h    CONNECT-B3-ACTIVE-IND  indication that Level 3 connection complete
 83h/03h    CONNECT-B3-ACTIVE-RESP confirm connection-complete indication
 84h/00h    DISCONNECT-B3-REQ   request shutdown of Level 3 connection
 84h/01h    DISCONNECT-B3-CONF  confirm shutdown of Level 3 connection
 84h/02h    DISCONNECT-B3-IND   indication that Level 3 is shutting down
 84h/03h    DISCONNECT-B3-RESP  confirm that application knows of shutdown
 85h/00h    GET-B3-PARAMS-REQ   request Level 3 parameters
 85h/01h    GET-B3-PARAMS-CONF  return Level 3 parameters
 86h/00h    DATA-B3-REQ         send data on Level 3
 86h/01h    DATA-B3-CONF        confirm sending of Level 3 data
 86h/02h    DATA-B3-IND         indication of incoming Level 3 data
 86h/03h    DATA-B3-RESP        confirm receipt of Level 3 data
 87h/02h    HANDSET-IND         indication of Handset events
 87h/03h    HANDSET-RESP        confirm receipt of Handset event
 FFh/00h    MANUFACTURER-REQ    vendor-specific request
 FFh/01h    MANUFACTURER-CONF   vendor-specific request confirmation
 FFh/02h    MANUFACTURER-IND    vendor-specific notification
 FFh/03h    MANUFACTURER-RESP   vendor-specific notification confirmation
SeeAlso: #04071,#04073
----------F1--03-----------------------------
INT F1 - Common ISDN API (CAPI) v2.0 - "CAPI_PUT_MESSAGE"
        AL = 03h
        AH = CAPI version number * 10 (14h for v2.0)
        DX = application ID (see INT F1/AL=01h)
        ES:BX -> message to be sent (see #04071)
Return: AX = status (0000h,11xxh) (see #04070)
Notes:  the caller is required to provide at least 512 bytes of stack space
        the message buffer may be reused as soon as this call returns
SeeAlso: AH=03h,INT F1/AL=01h,INT F1/AL=04h

(Table 04073)
Values for CAPI v2.0 message command/subcommand:
Cmd/SubCmd      Name                    Description
 01h/80h    ALERT_REQ           indicate compatibility with incoming calls
 01h/81h    ALERT_CONF          confirm receipt of ALERT_REQ
 02h/80h    CONNECT_REQ         establish B-channel connection
 02h/81h    CONNECT_CONF        confirm start of connection establishment
 02h/82h    CONNECT_IND         indication from CAPI of incoming connection
 02h/83h    CONNECT_RESP        accept incoming connection
 03h/82h    CONNECT_ACTIVE_IND  indication that B-channel connection complete
 03h/83h    CONNECT_ACTIVE_RESP confirm connection-complete indication
 04h/80h    DISCONNECT_REQ      request shutdown of B-channel connection
 04h/81h    DISCONNECT_CONF     confirm shutdown of B-channel connection
 04h/82h    DISCONNECT_IND      indication that B-channel is shutting down
 04h/83h    DISCONNECT_RESP     confirm that application knows of shutdown
 05h/80h    LISTEN_REQ          enable signalling on incoming events
 05h/81h    LISTEN_CONF         confirm enabling of incoming event signalling
 08h/80h    INFO_REQ            send protocol information for physical connect
 08h/81h    INFO_CONF           confirm INFO_REQ
 08h/82h    INFO_IND            indicate event for physical connection
 08h/83h    INFO_CONF           confirm receipt of INFO_IND
 41h/80h    SELECT_B_PROTOCOL_REQ   change protocol on already-active connect
 41h/81h    SELECT_B_PROTOCOL_CONF  confirm receipt of SELECT_B_PROTOCOL_REQ
 80h/80h    FACILITY_REQ        control optional facilities
 80h/81h    FACILITY_CONF       confirm acceptance of FACILITY_REQ
 80h/82h    FACILITY_IND        indicate facility-dependent event
 80h/83h    FACILITY_RESP       confirm receipt of FACILITY_IND
 82h/80h    CONNECT_B3_REQ      establish Level 3 connection
 82h/81h    CONNECT_B3_CONF     confirm start of connection establishment
 82h/82h    CONNECT_B3_IND      indication of incoming Level 3 connection
 82h/83h    CONNECT_B3_RESP     accept incoming connection
 83h/82h    CONNECT_B3_ACTIVE_IND  indication that Level 3 connection complete
 83h/83h    CONNECT_B3_ACTIVE_RESP confirm connection-complete indication
 84h/80h    DISCONNECT_B3_REQ   request shutdown of Level 3 connection
 84h/81h    DISCONNECT_B3_CONF  confirm shutdown of Level 3 connection
 84h/82h    DISCONNECT_B3_IND   indication that Level 3 is shutting down
 84h/83h    DISCONNECT_B3_RESP  confirm that application knows of shutdown
 85h/80h    GET_B3_PARAMS_REQ   request Level 3 parameters
 85h/81h    GET_B3_PARAMS_CONF  return Level 3 parameters
 86h/80h    DATA_B3_REQ         send data on Level 3
 86h/81h    DATA_B3_CONF        confirm sending of Level 3 data
 86h/82h    DATA_B3_IND         indication of incoming Level 3 data
 86h/83h    DATA_B3_RESP        confirm receipt of Level 3 data
 87h/80h    RESET_B3_REQ        request resetting of a logical connection
 87h/81h    RESET_B3_CONF       confirm logical connection reset
 87h/82h    RESET_B3_IND        indication from CAPI that logical conn. reset
 87h/83h    RESET_B3_RESP       confirm receipt of RESET_B3_IND
 88h/82h    CONNECT_B3_T90_ACTIVE_IND  indicate switch from T.70 to T.90
 88h/83h    CONNECT_B3_T90_ACTIVE_RESP confirm receipt of T90_ACTIVE_IND
 FFh/80h    MANUFACTURER_REQ    vendor-specific request
 FFh/81h    MANUFACTURER_CONF   vendor-specific request confirmation
 FFh/82h    MANUFACTURER_IND    vendor-specific notification
 FFh/83h    MANUFACTURER_RESP   vendor-specific notification confirmation
SeeAlso: #04071,#04072
----------F104-------------------------------
INT F1 - Common ISDN API (CAPI) v1.1 - "API-GET-MESSAGE"
        AH = 04h
        DX = application ID (see AH=01h)
Return: AX = status (0000h,1002h,1006h,1007h) (see #04069)
        ES:BX -> message if successful (see #04071)
Range:  INT 00 to INT FF, selectable by program parameter
Notes:  the caller is required to provide at least 512 bytes of stack space
        the returned message may be overwritten by the next call to this
          function
SeeAlso: AH=03h
----------F1--04-----------------------------
INT F1 - Common ISDN API (CAPI) v2.0 - "CAPI_GET_MESSAGE"
        AL = 04h
        AH = CAPI version number * 10 (14h for v2.0)
        DX = application ID (see AH=01h)
Return: AX = status (0000h,11xxh) (see #04070)
        ES:BX -> message if successful (see #04071)
Range:  INT 00 to INT FF, selectable by program parameter
Notes:  the caller is required to provide at least 512 bytes of stack space
        the returned message may be overwritten by the next call to this
          function
SeeAlso: AH=04h,INT F1/AL=03h
----------F105-------------------------------
INT F1 - Common ISDN API (CAPI) v1.1 - "API-SET-SIGNAL" - SIGNAL HANDLING
        AH = 05h
        DX = application ID (see AH=01h)
        ES:BX -> signal handler or 0000h:0000h to disable
Return: AX = status (0000h,1002h) (see #04069)
Notes:  the caller is required to provide at least 512 bytes of stack space
        the signal handler is called as though it were an interrupt, with
          interrupts disabled; the handler must preserve all registers and
          return with an IRET
SeeAlso: AH=01h
----------F1--05-----------------------------
INT F1 - Common ISDN API (CAPI) v2.0 - "CAPI_SET_SIGNAL" - SIGNAL HANDLING
        AL = 05h
        AH = CAPI version number * 10 (14h for v2.0)
        DX = application ID (see AH=01h)
        ES:BX -> signal handler or 0000h:0000h to disable
        SI:DI = parameter to pass to signal handler
Return: AX = status (0000h,11xxh) (see #04070)
Notes:  the caller is required to provide at least 512 bytes of stack space
        the signal handler is called as though it were an interrupt, with
          interrupts disabled and DX,SI,DI set as they were when this function
          was called; the handler must preserve all registers and return with
          an IRET
        the signal handler may call CAPI_PUT_MESSAGE, CAPI_GET_MESSAGE, and
          CAPI_SET_SIGNAL
SeeAlso: INT F1/AL=01h
----------F106-------------------------------
INT F1 - Common ISDN API (CAPI) v1.1 - "API-DEINSTALL" - UNINSTALL
        AH = 06h
        BX = force flag
            0000h normal uninstall
            0001h forced uninstall
Return: AX = status (0000h,1008h) (see #04069)
Desc:   reset ISDN controller, close all ISDN Level 1 connections except for
          telephone connections
Notes:  the caller is required to provide at least 512 bytes of stack space
SeeAlso: INT F1/AL=01h,INT F1/AH=01h
----------F1F0-------------------------------
INT F1 - Common ISDN API (CAPI) v1.1 - "API-GET-MANUFACTURER"
        AH = F0h
        ES:BX -> 64-byte buffer for manufacturer identification information
Return: ES:BX buffer filled with ASCIZ idnetification string
Range:  INT 00 to INT FF, selectable by program parameter
Notes:  the caller is required to provide at least 512 bytes of stack space
SeeAlso: AH=01h,AH=F1h,AH=F2h,AH=FFh,INT F1/AL=F0h
----------F1--F0-----------------------------
INT F1 - Common ISDN API (CAPI) v2.0 - "CAPI_GET_MANUFACTURER"
        AL = F0h
        AH = CAPI version number * 10 (14h for v2.0)
        ES:BX -> 64-byte buffer for manufacturer identification information
Return: ES:BX buffer filled with ASCIZ idnetification string
Range:  INT 00 to INT FF, selectable by program parameter
Notes:  the caller is required to provide at least 512 bytes of stack space
SeeAlso: AH=F0h,INT F1/AL=01h,INT F1/AL=F1h,INT F1/AL=F2h,INT F1/AL=FFh
----------F1F1-------------------------------
INT F1 - Common ISDN API (CAPI) v1.1 - "API-GET-VERSION"
        AH = F1h
        ES:BX -> 64-byte buffer for CAPI version number
Return: ES:BX buffer filled with ASCIZ version string
Notes:  the caller is required to provide at least 512 bytes of stack space
SeeAlso: AH=01h,AH=F0h,AH=F2h,AH=FFh
----------F1--F1-----------------------------
INT F1 - Common ISDN API (CAPI) v2.0 - "CAPI_GET_VERSION"
        AL = F1h
        AH = CAPI version number * 10 (14h for v2.0)
Return: AH = CAPI major version number
        AL = CAPI minor version number
        DH = vendor-specific major version
        DL = vendor-specific minor version
Notes:  the caller is required to provide at least 512 bytes of stack space
SeeAlso: AH=F1h,INT F1/AL=01h,INT F1/AL=F0h,INT F1/AL=F2h,INT F1/AL=FFh
----------F1F2-------------------------------
INT F1 - Common ISDN API (CAPI) v1.1 - "API-GET-SERIAL-NUMBER"
        AH = F2h
        ES:BX -> 64-byte buffer for CAPI serial number
Return: ES:BX buffer filled with ASCIZ serial number (seven digits), empty
              string if no serial number
Notes:  the caller is required to provide at least 512 bytes of stack space
SeeAlso: AH=01h,AH=F0h,AH=F1h,AH=FFh
----------F1--F2-----------------------------
INT F1 - Common ISDN API (CAPI) v2.0 - "CAPI_GET_SERIAL_NUMBER"
        AL = F2h
        AH = CAPI version number * 10 (14h for v2.0)
        ES:BX -> 64-byte buffer for CAPI serial number
Return: ES:BX buffer filled with ASCIZ serial number (seven digits), empty
              string if no serial number
Notes:  the caller is required to provide at least 512 bytes of stack space
SeeAlso: AH=F2h,INT F1/AL=01h,INT F1/AL=F0h,INT F1/AL=F1h,INT F1/AL=F3h
----------F1--F3-----------------------------
INT F1 - Common ISDN API (CAPI) v2.0 - "CAPI_GET_PROFILE" - GET CAPABILITIES
        AL = F3h
        AH = CAPI version number * 10 (14h for v2.0)
        ES:BX -> 64-byte buffer for CAPI capabilities (see #04074)
        CX = controller number (01h-06h) or 0000h to get number of controllers
Return: AX = status (0000h,11xxh) (see #04070)
        ES:BX buffer filled if successful
Notes:  the caller is required to provide at least 512 bytes of stack space
SeeAlso: INT F1/AL=01h,INT F1/AL=F0h,INT F1/AL=F2h,INT F1/AH=FFh

Format of CAPI v2.0 capabilities:
Offset  Size    Description     (Table 04074)
 00h    WORD    number of installed controllers
 02h    WORD    number of supported B channels
 04h    DWORD   global options (see #04075)
 08h    DWORD   B1 protocol support flags (see #04076)
 0Ch    DWORD   B2 protocol support flags (see #04077)
 10h    DWORD   B3 protocol support flags (see #04078)
 14h 24 BYTEs   reserved for CAPI use
 2Ch 20 BYTEs   vendor-specific information

Bitfields for CAPI v2.0 global options:
Bit(s)  Description     (Table 04075)
 0      internal controller supported
 1      external controller supported
 2      handset supported (only if bit 1 also set)
 3      DTMF supported
 4-31   reserved (0)
SeeAlso: #04074

Bitfields for CAPI v2.0 B1 protocol support:
Bit(s)  Description     (Table 04076)
 0      64k bps with HDLC framing (required, always set)
 1      64k bps bit-transparent operation with network byte framing
 2      V.110 asynchronous with start/stop byte framing
 3      V.110 synchronous with HDLC framing
 4      T.30 modem for group 3 FAX
 5      64k bps inverted with HDLC framing
 6      56k bps bit-transparent operation with network byte framing
 7-31   reserved (0)
SeeAlso: #04074

Bitfields for CAPI v2.0 B2 protocol support:
Bit(s)  Description     (Table 04077)
 0      ISO 7776 (X.75 SLP) (required, always set)
 1      transparent
 2      SDLC
 3      Q.921 LAPD (D-channel X.25)
 4      T.30 for group 3 FAX
 5      point-to-point protocol (PPP)
 6      transparent (ignoring B1 framing errors)
 7-31   reserved (0)
SeeAlso: #04074

Bitfields for CAPI v2.0 B3 protocol support:
Bit(s)  Description     (Table 04078)
 0      transparent (required, always set)
 1      T.90NL with T.70NL compatibility
 2      ISO 8208 (X.25 DTE-DTE)
 3      X.25 DCE
 4      T.30 for group 3 FAX
 5-31   reserved (0)
SeeAlso: #04074
----------F1FF-------------------------------
INT F1 - Common ISDN API (CAPI) v1.1 - "API-MANUFACTURER" - VENDOR-SPECIFIC
        AH = FFh
        other registers vendor-specific
Return: registers vendor-specific
Range:  INT 00 to INT FF, selectable by program parameter
Notes:  the caller is required to provide at least 512 bytes of stack space
SeeAlso: AH=01h,AH=F0h,AH=F1h,AH=F2h,INT F1/AH=FFh
----------F1--FF-----------------------------
INT F1 - Common ISDN API (CAPI) v2.0 - "CAPI_MANUFACTURER" - VENDOR-SPECIFIC
        AL = FFh
        AH = CAPI version number * 10 (14h for v2.0)
        other registers vendor-specific
Return: registers vendor-specific
Range:  INT 00 to INT FF, selectable by program parameter
Notes:  the caller is required to provide at least 512 bytes of stack space
SeeAlso: AH=FFh,INT F1/AL=01h,INT F1/AL=F0h,INT F1/AL=F1h,INT F1/AL=F2h
--------*-F2---------------------------------
INT F2 - reserved for user interrupt
--------s-F2---------------------------------
INT F2 - Andy C. McGuire SPEECH.COM/SAY.COM
SeeAlso: INT F1"SPEECH"
--------N-F2---------------------------------
INT F2 - NetWare Remote Boot - ORIGINAL INT 13
SeeAlso: INT F1"NetWare",INT F3"NetWare",INT F4"NetWare"
----------F2---------------------------------
INT F2 - ICCTSR 1.0 - ImageCapture COLOR Developer's Kit - API
        AH = function number (see #04079)
        ???
Return: ???
Program: ImageCapture is a product of International Computers
SeeAlso: INT F3"ICCTSR"

(Table 04079)
Values for ImageCapture function:
 01h    power up
 02h    power down
 03h    set controls
 04h    capture image
 05h    display image
 06h    read file
 07h    write file
 08h    write array
 09h    read pixel
 0Ah    write pixel
 0Bh    check if VGA present
 0Ch    set video mode
 0Dh    check for keystroke
 0Eh    delay
--------*-F3---------------------------------
INT F3 - reserved for user interrupt
SeeAlso: INT F2"user",INT F4"user"
--------s-F3---------------------------------
INT F3 - SoundBlaster - POINTER TO ECHO VALUE
Note:   this is not a vector, but a pointer to a DWORD containing the echo
          value selected with SET-ECHO.EXE
SeeAlso: INT 2F/AX=FBFBh/ES=0000h
----------F3---------------------------------
INT F3 - ICCTSR 1.0 - HANDSHAKE ID VECTOR
Program: ImageCapture is a product of International Computers
SeeAlso: INT F2"ICCTSR"
--------N-F3---------------------------------
INT F3 - NetWare Remote Boot - BOOT ROM'S INT 13 HANDLER
SeeAlso: INT F1"NetWare",INT F2"NetWare",INT F4"NetWare"
--------*-F4---------------------------------
INT F4 - reserved for user interrupt
SeeAlso: INT F3"user",INT F5"user"
--------T-F4---------------------------------
INT F4 - DoubleDOS - GIVE UP REST OF CURRENT CLOCK TICK AND ALL OF NEXT TICK
SeeAlso: INT 21/AH=EEh"DoubleDOS",INT F5"DoubleDOS",INT FE"DoubleDOS"
--------N-F4---------------------------------
INT F4 - NetWare Remote Boot - ???
SeeAlso: INT F1"NetWare",INT F2"NetWare",INT F3"NetWare"
--------*-F5---------------------------------
INT F5 - reserved for user interrupt
SeeAlso: INT F4"user",INT F6"user"
--------T-F5---------------------------------
INT F5 - DoubleDOS - ???
SeeAlso: INT F4"DoubleDOS",INT F6"DoubleDOS"
--------*-F6---------------------------------
INT F6 - reserved for user interrupt
SeeAlso: INT F5"user",INT F7"user"
--------T-F6---------------------------------
INT F6 - DoubleDOS - ???
SeeAlso: INT F5"DoubleDOS",INT F7"DoubleDOS"
--------*-F7---------------------------------
INT F7 - reserved for user interrupt
SeeAlso: INT F6"user"
--------T-F7---------------------------------
INT F7 - DoubleDOS - ???
SeeAlso: INT F6"DoubleDOS"
----------F700-------------------------------
INT F7 - FSBBS 2.0 - CONFIGURATION RECORD
        AH = 00h
        AL = function
            00h get configuration record
                Return: DS:DX -> configuration record
            01h set configuration record
                Return: nothing
            02h get path for option
                DS:DX -> option name
                Return: DS:DX -> path
            03h determine whether configuration record set
                Return: AX = status
                            0000h set
                            0001h not yet set
            04h get link state
                Return: AX = state
                            0000h unlinked
                            0001h linked
Notes:  this information is preliminary and still subject to change
        all of the INT F7 calls for FSBBS are used for interprogram
          communication between the BBS kernel and the programs it spawns
SeeAlso: AH=01h
----------F701-------------------------------
INT F7 - FSBBS 2.0 - USER RECORD
        AH = 01h
        AL = function
            00h get user record for user currently online
                Return: DS:DX -> user record
            01h set user record
                DS:DX -> user record
                Return: nothing
SeeAlso: AH=00h,AH=02h
----------F702-------------------------------
INT F7 - FSBBS 2.0 - GET ACCOUNT NAME
        AH = 02h
Return: DS:DX -> 8-character blank-padded account name
SeeAlso: AH=01h
----------F703-------------------------------
INT F7 - FSBBS 2.0 - TERMINAL NUMBER
        AH = 03h
        AL = function
            00h get terminal index number
                Return: DX = index number
            01h set terminal index number
                DX = terminal index
                Return: nothing
----------F704-------------------------------
INT F7 - FSBBS 2.0 - PASSDATA BUFFER
        AH = 04h
        AL = function
            00h get PassData buffer contents
                DS:DX -> buffer for PassData contents
                Return: DS:DX buffer filled
            01h set PassData contents
                DS:DX -> buffer containing new PassData
                CH = length of data in buffer
                Return: nothing
----------F705-------------------------------
INT F7 - FSBBS 2.0 - TIMER FUNCTIONS
        AH = 05h
        AL = function
            00h get time remaining
                Return: DX = number of minutes remaining
            01h get current time
                Return: DS:DX -> 8-character time string
            02h increment time
                DX = number of additional minutes
            03h decrement time
                DX = number of minutes
SeeAlso: AH=06h
----------F706-------------------------------
INT F7 - FSBBS 2.0 - FUNCTION AVAILABILITY
        AH = 06h
        AL = function
            00h determine whether function is available
                DX = index of function
            01h set function availability
                DX = index of function
                ???
Return: nothing
SeeAlso: AH=05h,AH=07h
----------F707-------------------------------
INT F7 - FSBBS 2.0 - DUMP FUNCTIONS
        AH = 07h
        AL = function
            00h get current dump mode
                Return: DL = mode
            01h set dump mode
                DL = mode
SeeAlso: AH=06h
--------*-F8---------------------------------
INT F8 - reserved for user interrupt
--------h-F8---------------------------------
INT F8 - Sanyo MBC-550/555 - IRQ0 - 100 HZ INTERRUPT
Note:   normally masked off at 8259 interrupt controller
SeeAlso: INT 08"IRQ0",INT F9"Sanyo",INT FA"Sanyo"
--------T-F8---------------------------------
INT F8 - DoubleDOS - ???
--------*-F9---------------------------------
INT F9 - reserved for user interrupt
--------T-F9---------------------------------
INT F9 - DoubleDOS - ???
--------h-F9---------------------------------
INT F9 - Sanyo MBC-550/555 - IRQ1 - ???
Note:   documented as "for system use only"; normally enabled at the 8259
SeeAlso: INT 09"IRQ1",INT F8"Sanyo",INT FA"Sanyo"
--------*-FA---------------------------------
INT FA - reserved for user interrupt
--------h-FA---------------------------------
INT FA - Sanyo MBC-550/555 - IRQ2 - SERIAL PORT USART INTERRUPT
Note:   this vector is not used on the Tandy 1000TL
SeeAlso: INT 0A"IRQ2",INT F9"Sanyo",INT FB"Sanyo"
--------T-FA---------------------------------
INT FA - DoubleDOS - TURN OFF TIMESHARING
SeeAlso: INT 21/AH=EAh"DoubleDOS",INT FB"DoubleDOS"
----------FA---------------------------------
INT FA P - ASM Edit - INSTALLATION CHECK
Program: ASM Edit is a shareware programmer's editor
Note:   ASM Edit hooks this vector in protected mode to allow DPMI programs
          to detect whether they were run while shelled to DOS from ASM Edit

Format of ASM Edit signature block:
Offset  Size    Description     (Table 04080)
 00h    BYTE    CFh (IRET)
 01h  8 BYTEs   signature "ASM Edit" (no trailing NUL)
--------*-FB---------------------------------
INT FB - reserved for user interrupt
--------h-FB---------------------------------
INT FB - Sanyo MBC-550/555 - IRQ3 - KEYBOARD USART RECEIVE INTERRUPT
SeeAlso: INT 0B"IRQ3",INT FA"Sanyo",INT FC"Sanyo"
--------T-FB---------------------------------
INT FB - DoubleDOS - TURN ON TIMESHARING
SeeAlso: INT 21/AH=EBh"DoubleDOS",INT FA"DoubleDOS"
--------*-FC---------------------------------
INT FC - reserved for user interrupt
--------T-FC---------------------------------
INT FC - DoubleDOS - GET CURRENT SCREEN BUFFER ADDRESS
Return: ES = segment of display buffer
Desc:   determine the address of the virtual screen to which the program
          should write instead of the actual video memory, so that the
          multitasked programs do not interfere with each other's output
Note:   the display buffer may be moved if multitasking is enabled
SeeAlso: INT 21/AH=ECh"DoubleDOS",INT FB"DoubleDOS"
--------h-FC---------------------------------
INT FC - Sanyo MBC-550/555 - IRQ4 - PRINTER READY INTERRUPT
Note:   normally masked off at the 8259 interrupt controller
SeeAlso: INT 0C"IRQ4",INT FB"Sanyo",INT FD"Sanyo"
--------*-FD---------------------------------
INT FD - reserved for user interrupt
--------T-FD---------------------------------
INT FD - DoubleDOS - ???
--------h-FD---------------------------------
INT FD - Sanyo MBC-550/555 - IRQ5 - FLOPPY DISK CONTROLLER
SeeAlso: INT 0D"IRQ5",INT FC"Sanyo",INT FE"Sanyo"
--------S-FD---------------------------------
INT FD - TFPCX - INSTALLATION CHECK
        AH = function (also see separate entries below)
Program: TFPCX is an interface between modem and terminal program for packet-
          radio communications
InstallCheck:   test for the string "N5NX" three bytes beyond the interrupt
          handler
Range:  INT FD is the default, but may be changed, so the full installation
         check consists of scanning for the signature
Note:   TFPCX returns AX=FFFFh on any unsupported function call
SeeAlso: AH=01h,AH=03h,AH=FEh
--------S-FD01-------------------------------
INT FD - TFPCX - TEST FOR CHARACTER WAITING
        AH = 01h
Return: AX = status
            0000h no characters waiting
            0001h character available for input
Program: TFPCX is an interface between modem and terminal program for packet-
          radio communications
SeeAlso: AH=02h
--------S-FD02-------------------------------
INT FD - TFPCX - GET CHARACTER
        AH = 02h
Return: AL = character
Notes:  this call is only allowed if AH=01h indicated that a character is
          available
        all available characters should be read before sending any additional
          characters
SeeAlso: AH=01h,AH=03h
--------S-FD03-------------------------------
INT FD - TFPCX - OUTPUT CHARACTER
        AH = 03h
        AL = character to send
Return: nothing
SeeAlso: AH=02h
--------S-FDFE-------------------------------
INT FD - TFPCX - GET VERSION
        AH = FEh
Return: AH = major version
        AL = minor version
Program: TFPCX is an interface between modem and terminal program for packet-
          radio communications
SeeAlso: AH=01h,AH=03h
--------B-FE---------------------------------
INT FE - AT/XT286/PS50+ - destroyed by return from protected mode
Note:   the ROM BIOS uses 0030h:0100h as the initial stack on startup, which
          is the last fourth of the interrupt vector table.  If the processor
          is returned to real mode via a hardware reset (the only possibility
          on an 80286, though there are a number of ways of generating one),
          then the BIOS startup code stacks three words on its scratch stack
          before determining that a return to real mode has been requested.
          As a result, INT FE and INT FF are corrupted.
SeeAlso: INT FF"XT286"
--------T-FE---------------------------------
INT FE - DoubleDOS - GIVE UP TIME
        AL = number of 55ms time slices to give away
Return: after other program (if active) has run
SeeAlso: INT 21/AH=EEh"DoubleDOS",INT F4"DoubleDOS"
--------G-FE---------------------------------
INT FE - Turbo Debugger 8086 v2.5+ - OVERLAY MANAGER
SeeAlso: INT 3F
--------h-FE---------------------------------
INT FE - Sanyo MBC-550/555 - IRQ6 - 8087 COPROCESSOR INTERRUPT
Note:   normally masked off at the 8259 interrupt controller
SeeAlso: INT 0E"IRQ6",INT FD"Sanyo",INT FF"Sanyo"
--------B-FF---------------------------------
INT FF - AT/XT286/PS50+ - destroyed by return from protected mode
Note:   (see INT FE"XT286")
SeeAlso: INT FE"XT286"
--------b-FF---------------------------------
INT FF - Z100 - WARM BOOT
SeeAlso: INT 40"Z100"
--------h-FF---------------------------------
INT FF - Sanyo MBC-550/555 - IRQ7 - USER INTERRUPT FOR EXTERNAL INTERRUPT
Note:   normally masked off at the 8259 interrupt controller
SeeAlso: INT 0F"IRQ7",INT FE"Sanyo"
--------Q-FF---------------------------------
INT FF U - QEMM-386.SYS v6.0+ - internal
Notes:  requires that a byte in the conventional-memory stub be set to the
          desired function number (00h through 0Ch)
SeeAlso: #04081

(Table 04081)
Values for QEMM internal functions:
 00h    reflect back to Virtual86-mode interrupt handler (default)
 01h    ???
 02h    access DR7???
 03h    QPI upcall (see INT 67/AH=3Fh)
 04h    ???
 05h    ???
 06h    INT 15/AH=87h
 07h    EMS services (see INT 67/AH=40h,INT 67/AH=5Dh)
 08h    ???
 09h    QEMM exception handler
 0Ah    XMS services (see INT 2F/AX=4310h"XMS")
 0Bh    Virtual DMA Services (see INT 4B/AX=8102h)
 0Ch    ???
--------v-FF---------------------------------
INT FF - VIRUS - "Violetta" - ???
Note:   used but not chained by virus
SeeAlso: INT E0"VIRUS",INT F1"VIRUS"
--------V-FF----BX0000-----------------------
INT FF - PC/FORTH - GRAPHICS API - VIDEO STATUS CHANGE
        BX = 0000h
        DS:SI -> FORTH program counter
        SS:BP -> FORTH parameter stack
        SS:SP -> FORTH return stack
        DS:DX -> FORTH video parameter area
Desc:   called to inform graphics driver of any status changes such as video
          mode changes, character color changes, graphics XOR mode turned on
          or off, etc.; also used as an installation check
Index:  installation check;PC/FORTH
--------V-FF---------------------------------
INT FF - PC/FORTH - GRAPHICS API
        BX = function number
            0001h function REDRAW
            0002h function !PEL
            0003h function @PEL
            0004h function LINE
            0005h function ARC
            0006h function @BLOCK
            0007h function !BLOCK
            0008h function FLOOD
        DS:SI -> FORTH program counter
        SS:BP -> FORTH parameter stack
        SS:SP -> FORTH return stack
        details of parameters not available
Return: AX,BX,CX,DX,ES,DI may be destroyed
Note:   these functions all display an error message if the graphics routines
          are not resident
--------!---Admin----------------------------
Highest Table Number = 04081
--------!---FILELIST-------------------------
Please redistribute all of the files comprising the interrupt list (listed at
the beginning of the list and in INTERRUP.1ST) unmodified as a group, in a
quartet of archives named INTER60A through INTER60D (preferably the original
authenticated PKZIP archives), the utility programs in a fifth archive
called INTER60E.ZIP, the WinHelp-related programs in a sixth archive
named INTER60F.ZIP, and the non-WinHelp hypertext programs in a seventh archive
names INTER60G.ZIP.

Copyright (c) 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999 Ralf Brown
--------!---CONTACT_INFO---------------------
Internet: ralf@pobox.com (currently forwards to ralf@telerama.lm.com)
FIDO: Ralf Brown 1:129/26.1