Interrupt List, part 6 of 8
This compilation is Copyright (c) 1989,1990,1991,1992 Ralf Brown
----------2FC0-------------------------------
INT 2F - MTEZ XpressFax Hardware TSR (CLASS2) - API
AH = C0h
AL = function code (01h to 15h)
Return: ???
SeeAlso: AX=C000h"MTEZ",AX=CB00h"MTEZ"
----------2FC000-----------------------------
INT 2F - Novell ODI Link Support Layer (LSL.COM) - INSTALLATION CHECK
AX = C000h
Return: AL = FFh
ES:BX -> FAR entry point
ES:SI -> signature string "LINKSUP$"
Note: LSL.COM may use any multiplex number between C0h and FFh; it searches
for itself in that range, and installs using the first free multiplex
number in the range if not already loaded.
Call entry point with:
BX = 0002h get entry points
ES:SI -> buffer for entry point record (see below)
Return: ES:SI buffer filled
Format of entry point record:
Offset Size Description
00h DWORD pointer to ??? entry point in LSL
04h DWORD pointer to ??? entry point in LSL
----------2FC000-----------------------------
INT 2F - MTEZ XpressFax Hardware TSR (CLASS2) - INSTALLATION CHECK
AX = C000h
BX = 444Bh
CX = 4A4Eh
Return: AL = status
00h not installed, OK to install
FFh installed
BX = 646Bh
CX = 6A6Eh
Note: this TSR will use any free multiplex number from C0h to FFh
SeeAlso: AH=C0h"MTEZ"
----------2FC050-----------------------------
INT 2F U - Explosiv 2.00 - INSTALLATION CHECK
AX = C050h
Return: AL = 51h if installed
Notes: Explosiv is a shareware animated screen blanker for DOS and Windows 3
by Reidar Gresseth and Chris Hook
AH=C0h is the default multiplex number, but may be reconfigured to
any value from C0h to C9h
SeeAlso: AX=C052h
----------2FC052-----------------------------
INT 2F U - Explosiv 2.00 - 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
----------2FC054-----------------------------
INT 2F U - Explosiv 2.00 - GET ???
AX = C054h
Return: AL = ???
Note: returns value set by AX=C057h
SeeAlso: AX=C057h
----------2FC055-----------------------------
INT 2F U - Explosiv 2.00 - SET BLANKING INTERVAL
AX = C055h
BX = new interval in clock ticks
----------2FC056-----------------------------
INT 2F U - Explosiv 2.00 - SET ???
AX = C056h
BL = ???
----------2FC057-----------------------------
INT 2F U - Explosiv 2.00 - SET ???
AX = C057h
BL = ???
SeeAlso: AX=C054h
----------2FC058-----------------------------
INT 2F U - Explosiv 2.00 - SET ???
AX = C058h
BL = ???
----------2FC059-----------------------------
INT 2F U - Explosiv 2.00 - CLEAR ???
AX = C059h
Note: clears flag set by AX=C05Ah
SeeAlso: AX=C05Ah
----------2FC05A-----------------------------
INT 2F U - Explosiv 2.00 - SET ???
AX = C05Ah
BL = ???
Note: sets flag cleared by AX=C059h then stores BL
SeeAlso: AX=C059h,AX=C05Bh
----------2FC05B-----------------------------
INT 2F U - Explosiv 2.00 - SET ???
AX = C05Bh
BL = ???
SeeAlso: AX=C05Ah,AX=C05Ch
----------2FC05C-----------------------------
INT 2F U - Explosiv 2.00 - SET ???
AX = C05Ch
BL = ???
SeeAlso: AX=C05Bh
----------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
----------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
----------2FC9FF-----------------------------
INT 2F - STACKMAN - INSTALLATION BROADCAST
AX = C9FFh
BL = BCD version number
CX = number of stacks
DX = stack size in bytes
Notes: called by STACKMAN when it goes resident to inform interested TSRs that
its API is available
the installation check consists of testing for the string "STACKXXX" at
offset 0Ah from the INT B4 handler
SeeAlso: INT B4"STACKMAN",INT B5"STACKMAN"
----------2FCA00BX5442-----------------------
INT 2F - TBSCANX - INSTALLATION CHECK
AX = CA00h
BX = 5442h ('TB')
Return: AL = 00h not installed
= FFh installed
BX = 7462h ('tb') if BX was 5442h on entry
Note: TBSCANX is a resident virus scanning module by Frans Veldman. Programs
may perform virus checks on themselves, other program files, or their
data files by invoking the TBSCANX API.
SeeAlso: AX=4653h,AX=C900h
----------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
----------2FCA02-----------------------------
INT 2F - TBSCANX - SET STATE
AX = CA02h
BL = new state (00h = disabled, 01h = enabled)
SeeAlso: AX=CA01h
----------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
----------2FCA04-----------------------------
INT 2F - TBSCANX - SCAN FILE
AX = CA04h
DS:DX -> filename
Return: CF clear if no virus signatures found
BX,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
----------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
----------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
----------2FCB00BX4D53-----------------------
INT 2F - MTEZ XpressFax CASMGR - INSTALLATION CHECK
AX = CB00h
BX = 4D53h
CX = 4949h
Return: AL = status
00h not installed, OK to install
01h not installed, not OK to install
FFh installed
BX = 6D73h
CX = 6969h
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"MTEZ",AX=CB0Eh,AX=CB16h
----------2FCB01-----------------------------
INT 2F - Communicating Applications Specification - SUBMIT A TASK
AX = CB01h
DS:DX -> ASCIZ name of task control file
Return: AX >= 0: event handle
< 0: error code
Note: files needed for an event must be kept until task is complete or error
SeeAlso: AX=CB0Bh,AX=CB15h
Error codes (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 INT 21/AH=59h
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 INT 21/AH=59h
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+)
----------2FCB02-----------------------------
INT 2F - Communicating Applications Specification - ABORT CURRENT EVENT
AX = CB02h
Return: AX >= 0: event handle of aborted event
< 0: error code (see AX=CB01h)
Note: termination could take up to 30 seconds
SeeAlso: AX=CB08h,AX=CB10h
----------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
< 0 error code (see AX=CB01h)
SeeAlso: AX=CB06h,AX=CB07h
----------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
< 0 error code (see AX=CB01h)
Note: direction of search is same as preceding FIND FIRST call
SeeAlso: AX=CB05h
----------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
< 0 error code (see AX=CB01h)
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
----------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
< 0 error code (see AX=CB01h)\
SeeAlso: AX=CB02h,AX=CB09h
----------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
< 0 error code (see AX=CB01h)
SeeAlso: AX=CB08h
----------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
< 0 error code (see AX=CB01h)
SeeAlso: AX=CB0Bh,AX=CB0Ch
----------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
< 0 error code (see AX=CB01h)
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
----------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
< 0 error code (see AX=CB01h)
SeeAlso: AX=CB0Ah,AX=CB0Dh
----------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
< 0 error code (see AX=CB01h)
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
----------2FCB0E-----------------------------
INT 2F - Communicating Applications Specification - GET EXTERNAL DATA BLOCK
AX = CB0Eh
DS:DX -> 256-byte buffer
Return: AX = 0000h successful
buffer filled
< 0 error code (see AX=CB01h)
Format of external data block:
Offset Size Description
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
----------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
= N number of rings before answer
< 0 error code (see AX=CB01h)
----------2FCB10-----------------------------
INT 2F - Communicating Applications Specification - GET CURRENT EVENT STATUS
AX = CB10h
DS:DX -> 512-byte buffer
Return: AX = 0000h successful
BX = event handle of current event or negative error code if
no current event
buffer filled
< 0 error code (see AX=CB01h)
SeeAlso: AX=CB02h,AX=CB0Dh
Format of status area:
Offset Size Description
00h BYTE event type
00h send
01h receive
02h polled send
03h polled receive
04h to 7Fh reserved
FFh serious hardware error
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
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
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 below)
Format of file transfer record:
Offset Size Description
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)
----------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 AX=CB01h)
SeeAlso: AX=CB12h
----------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
----------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
----------2FCB12-----------------------------
INT 2F - Communicating Applications Specification - GET HARDWARE STATUS
AX = CB12h
DS:DX -> 128-byte status buffer
Return: AX = 0000h successful
buffer filled with hardware-dependent status information
< 0 error code (see AX=CB01h)
SeeAlso: AX=CB10h,AX=CB11h
Format of status buffer for Intel Connection CoProcessor:
Offset Size Description
00h BYTE bit flags
bit 7: hardware busy sending or receiving
bit 6: last page of data
bit 5: no data on current page
bit 4: retransmit request for current page being transmitted
bit 3: NSF mode active
bits 2-0: reserved
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
bit 7: originating call
bit 6: FAX message to be sent
bit 5: on line
bit 4: ring detected and receive enabled
bit 3: buffer dumped on receive
bits 2-0: hardware sequence state
000 idle
001 dial
010 answer
011 transmit
100 receive
101 pre-message
110 post-message
111 disconnect
06h BYTE baud rate
bit 7: reserved
bits 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)
bits 3-0: reserved, should be 0110
07h 3 BYTEs reserved
0Ah BYTE hardware status
bit 7: modem option installed
bit 6: Connection CoProcessor has control of DAA (not latched)
bit 5: on line (not latched)
bit 4: ring detected (not latched)
bit 3: data in command buffer (not latched)
bit 2: set if using DMA channel 1, clear if using DMA channel 3
bit 1: line length compensation bit 1 set (not latched)
bit 0: line length compensation bit 0 set (not latched)
0Bh BYTE switch states
bit 7: reserved
bit 6: unused
bit 5: spare switch open
bit 4: FAX ADR1 switch open
bit 3: FAX ADR0 switch open
bit 2: alternate interrupt switch open
bit 1: COM SEL 1 switch open
bit 0: COM SEL 0 switch open
Note: valid combinations of bits 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
0Ch BYTE bit flags
bit 7: reserved
bit 6: auxiliary relay forced ON
bit 5: modem select relay forced ON
bit 4: offhook relay forced ON
bit 3: 9600 bps enabled
bit 2: 7200 bps enabled
bit 1: 4800 bps enabled
bit 0: 2400 bps enabled
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
Format of status buffer for Intel SatisFAXtion board:
Offset Size Description
00h BYTE connection status flags
bit 7: busy in T.30 CCITT fax protocol
bit 6: data on current page/file (only used for block xfers)
bit 5: retransmission of last page requested
bit 4: in file transfer mode
bit 3: data in buffer
bit 2: data buffer dumped on receive
bit 1: 200x100 dpi resolution instead of 200x200 dpi
bit 0: data modem in use, FAX image modem not available
01h BYTE board state
bit 7: reserved
bit 6: handset jack active, data and FAX modems not available
bits 5-3: current bit 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)
bits 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
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' is 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
----------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 below)
SeeAlso: AX=CB13h/DL=01h
Intel Connection CoProcessor failure codes:
bit 3: 9600 bps FAX modem module failed
bit 2: SDLC chip failed
bit 1: RAM failed
bit 0: ROM checksum failed
Intel SatisFAXtion failure codes:
bit 1: 2400 bps data modem failed
bit 0: 9600 bps FAX modem failed
----------2FCB13DL01-------------------------
INT 2F - Communicating Applications Specification - START DIAGNOSTICS
AX = CB13h
DL = 01h
Return: AX = 0000h successfully started
< 0 error code (see AX=CB01h)
SeeAlso: AX=CB13h/DL=00h
----------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
< 0 error code (see AX=CB01h)
----------2FCB15-----------------------------
INT 2F - Communicating Applications Specification - SUBMIT FILE TO SEND
AX = CB15h
DS:DX -> variable-length data area (see below)
Return: AX >= 0 event handle
< 0 error code (see AX=CB01h)
SeeAlso: AX=CB01h
Format of data area:
Offset Size Description
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 format, see INT 21/AX=5700h)
04h WORD date to send (DOS packed date format, see 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)
----------2FCB16BX1234-----------------------
INT 2F - Communicating Applications Spec v1.2+ - UNLOAD RESIDENT MANAGER
AX = CB16h
BX = 1234h
CX = 5678h
DX = 9ABCh
Return: AX = 0000h successful
< 0 error code
Note: the MTEZ XpressFax CASMGR ignores the values in BX,CX, and DX
SeeAlso: AX=C000h"MTEZ",AX=CB00h
----------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
< 0 error code
----------2FCB80-----------------------------
INT 2F - Intel SatisFAXtion CASMGR - ???
AX = CB80h
???
Return: ???
----------2FCB81-----------------------------
INT 2F - Intel SatisFAXtion CASMGR - ???
AX = CB81h
???
Return: ???
----------2FCB82-----------------------------
INT 2F - Intel SatisFAXtion CASMGR - ???
AX = CB82h
???
Return: ???
----------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
----------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
----------2FCC--SI5453-----------------------
INT 2F U - Qualitas Qcach v4.00
AH = CCh
SI = 5453h or 7473h
AL = ???
DL = 00h or ???
Return: SI = 7473h
???
----------2FCD00-----------------------------
INT 2F - Intel Image Processing Interface - INSTALLATION CHECK
AX = CD00h
Return: AL = 00h not installed, OK to install
01h not installed, not OK to install
FFh installed
SeeAlso: AX=CD02h"Image"
----------2FCD00-----------------------------
INT 2F - SWELL.EXE - INSTALLATION CHECK
AX = CD00h
Return: AX = 00FFh installed
BH = major version
BL = minor version
Note: SWELL.EXE is a TSR which swaps programs to disk when they EXEC a child
process with INT 21/AH=4Bh
----------2FCD01-----------------------------
INT 2F - Intel Image Processing Interface - SET DEVICE NAME
AX = CD01h
CX:BX -> ASCIZ character device name ("LPTn", "COMn", "PRN")
Return: AL = 00h successful
CX:BX -> internal character device name
= 80h error
----------2FCD01-----------------------------
INT 2F - SWELL.EXE - SUSPEND ONCE
AX = CD01h
Return: AX = 0000h
SeeAlso: AX=CD02h"SWELL"
----------2FCD02-----------------------------
INT 2F - Intel Image Processing Interface - GET VERSION NUMBER
AX = CD02h
Return: AL = 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"
----------2FCD02-----------------------------
INT 2F - SWELL.EXE - SUSPEND
AX = CD02h
Return: AX = 0000h
SeeAlso: AX=CD03h"SWELL"
----------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 = 00h succesful
CX = density at which scan line was mapped
ES:DI -> start of scan line
AL = 80h unsuccessful
= 81h scan line out of range
= 82h unsupported scan line density
= 83h out of memory
SeeAlso: AX=CD04h"Image"
----------2FCD03-----------------------------
INT 2F - SWELL.EXE - ACTIVATE
AX = CD03h
Return: AX = 0000h
SeeAlso: AX=CD02h"SWELL"
----------2FCD04-----------------------------
INT 2F - Intel Image Processing Interface - MOVE BITMAP TO SCANLINE
AX = CD04h
CX:BX -> structure (see below)
Return: AL = 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
SeeAlso: AX=CD03h"Image"
Format of structure:
Offset Size Description
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)
----------2FCD04-----------------------------
INT 2F - SWELL.EXE - TURN OFF VERBOSE MODE
AX = CD04h
Return: AX = 0000h
SeeAlso: AX=CD05h"SWELL"
----------2FCD05-----------------------------
INT 2F - Intel Image Processing Interface - PRINT PAGE
AX = CD05h
Return: AL = 00h successful
= 80h unsuccessful
Note: page image is retained, so multiple calls will print multiple copies of
the page
SeeAlso: AX=CD06h"Image"
----------2FCD05-----------------------------
INT 2F - SWELL.EXE - TURN ON VERBOSE MODE
AX = CD05h
Return: AX = 0000h
SeeAlso: AX=CD04h"SWELL"
----------2FCD06-----------------------------
INT 2F - Intel Image Processing Interface - CLEAR PAGE
AX = CD06h
Return: AL = 00h successful
= 80h unsuccessful
Note: palette is reset to default
SeeAlso: AX=CD09h"Image"
----------2FCD06-----------------------------
INT 2F - SWELL.EXE - UNINSTALL
AX = CD06h
Return: AX = 0000h uninstalled
= 8002h programs still swapped, not uninstalled
----------2FCD07-----------------------------
INT 2F - Intel Image Processing Interface - reserved
AX = CD07h
----------2FCD07-----------------------------
INT 2F - SWELL.EXE - GET INFO
AX = CD07h
ES:BX -> 32-byte buffer for info
Return: AX = 0000h successful
ES:BX buffer filled
= 8001h buffer wrong size
Format of info buffer:
Offset Size Description
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???
----------2FCD08-----------------------------
INT 2F - Intel Image Processing Interface - SCREEN IMAGE
AX = CD08h
CX:BX -> structure (see below)
Return: AL = 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
SeeAlso: AX=CD05h"Image",AX=CD09h"Image"
Format of structure:
Offset Size Description
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)
----------2FCD08-----------------------------
INT 2F - SWELL.EXE - UNUSED
AX = CD08h
Return: AX = FFFFh (error)
----------2FCD09-----------------------------
INT 2F - Intel Image Processing Interface - LOAD SCREEN
AX = CD09h
CX:BX -> structure (see below)
Return: AL = 00h successful
= 80h unsuccessful
SeeAlso: AX=CD06h"Image Processing",AX=CD0Ah"Image Processing"
Format of structure:
Offset Size Description
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
----------2FCD09-----------------------------
INT 2F - SWELL.EXE - TURN OFF "BORLAND SUPPORT"
AX = CD09h
Return: AX = 0000h
SeeAlso: AX=CD0Ah"SWELL"
----------2FCD0A-----------------------------
INT 2F - Intel Image Processing Interface - LOAD PALETTE
AX = CD0Ah
CX:BX -> palette structure (see below)
Return: AL = 00h successful
= 80h unsuccessful
SeeAlso: AX=CD09h"Image Processing"
Format of palette structure:
Offset Size Description
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
----------2FCD0A-----------------------------
INT 2F - SWELL.EXE - TURN ON "BORLAND SUPPORT"
AX = CD0Ah
Return: AX = 0000h
SeeAlso: AX=CD09h"SWELL"
----------2FCF00-----------------------------
INT 2F - TEMPLEXX - 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
----------2FD000-----------------------------
INT 2F - 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
Notes: MDEBUG is a shareware memory-resident debugging tool by Bernd Schemmer,
including a memory monitor, an interpreter and a disassembler
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 (see 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
----------2FD000-----------------------------
INT 2F - ZWmous - INSTALLATION CHECK
AX = D000h
Return: AX = 5A57h ("ZW") if installed
BX = segment of resident code
Note: 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
----------2FD000-----------------------------
INT 2F - Lotus CD/Networker - INSTALLATION CHECK
AX = D000h
Return: AL = FF 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"
----------2FD001-----------------------------
INT 2F - MDEBUG display driver - INITIALIZE DRIVER
AX = D001h
Return: CF set on error
AL = driver semaphor
AH = buffer semaphor
Notes: MDEBUG calls this function after every succesful 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
----------2FD002-----------------------------
INT 2F - 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
----------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"
----------2FD003-----------------------------
INT 2F - 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
----------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
----------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
----------2FD0-------------------------------
INT 2F - MDEBUG display driver - RESERVED FUNCTION NUMBERS
AH = D0h
AL = 06h-7Fh
Note: these functions are reserved for future use
----------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)
----------2FD100-----------------------------
INT 2F - 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 below)
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
Notes: MDEBUG is a shareware memory-resident debugging tool by Bernd Schemmer,
including a memory monitor, an interpreter, and a disassembler
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 (see 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
-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
----------2FD101-----------------------------
INT 2F - MDEBUG command driver - INITIALIZE DRIVER
AX = D101h
CX = command driver counter
Return: DL = 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
----------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 below)
Return: AL = FFh
CF set on error
AH = 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
DS:SI -> ASCIZ error message (max 30 characters)
else unknown error
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.
Format of MDEBUG data structure:
Offset Size Description
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
----------2FD103-----------------------------
INT 2F - MDEBUG command driver - EXECUTE KEY IN THE MONITOR
AX = D103h
BX = key code (like result of an interrupt 16h call)
CX = 0 -> the cursor is in the ASCII column of the monitor
CX = 1 -> the cursor is in one of the hex fields of the monitor
DS:SI -> MDEBUG data structure (see AX=D102h)
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
----------2FD104-----------------------------
INT 2F - MDEBUG command driver - EXECUTE KEY IN THE INTERPRETER
AX = D104h
DS:SI -> MDEBUG data structure (see AX=D102h)
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
----------2FD1-------------------------------
INT 2F - MDEBUG command driver - RESERVED FUNCTIONS
AH = D1h
AL = 05h-0Ah
Note: these functions are reserved for future use
----------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 below) (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 driver identification table:
Offset Size Description
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
----------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
----------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
----------2FD1-------------------------------
INT 2F - MDEBUG command driver - RESERVED FUNCTIONS
AH = D1h
AL = 13h-7Fh
Note: these functions are reserved for future use
----------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)
----------2FD200BX5144-----------------------
INT 2F U - Quarterdeck - QEMM/QRAM/VIDRAM/MANIFEST v5.0+ - 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")
Notes: QEMM/QRAM/VIDRAM/MANIFEST/etc will search for a free AH value from D2h
through FFh, then C0h through D1h
for AL <> 0, if the BX/CX/DX values don't match a the identifier of a
Quarterdeck product, it just chains to the previous INT 2F handler
----------2FD201BX4849-----------------------
INT 2F U - Quarterdeck - GET QD HIMEM PRESENCE
AX = D201h
BX = 4849h ("HI")
CX = 4D45h ("ME")
DX = 4D51h ("MQ")
Return: BX = 4F4Bh ("OK")
ES:DI -> HIMEM entry point
Notes: QEMM/QRAM/VIDRAM/MANIFEST will search for a free AH value from D2h
through FFh, then C0h through D1h
SeeAlso: AX=D201h/BX=5145h
----------2FD201BX4849-----------------------
INT 2F U - Quarterdeck - 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 = QEMM/QRAM code segment
Notes: QEMM/QRAM/VIDRAM/MANIFEST will search for a free AH value from D2h
through FFh, then C0h through D1h
QEMM and QRAM both responded the same
the HIRAM memory chain has the same format as the regular DOS 4.0
memory chain (see 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 QEMM/QRAM code segment returned in DX
are locked out regions such as video memory and ROMs.
----------2FD201BX4D41-----------------------
INT 2F U - Quarterdeck - MANIFEST v1.0+ - INSTALLATION CHECK
AX = D201h
BX = 4D41h ("MA")
CX = 4E49h ("NI")
DX = 4645h ("FE")
Return: BX = 5354h ("ST")
Note: QEMM/QRAM/VIDRAM/MANIFEST will search for a free AH value from D2h
through FFh, then C0h through D1h
----------2FD201BX4D45-----------------------
INT 2F U - Quarterdeck - DVDOS4GX.DVR - ???
AX = D201h
BX = 4D45h ("ME")
CX = 5155h ("QU")
DX = 5044h ("PD")
Return: ???
Notes: AH=D2h is the default; use the Quarterdeck installation check described
under AX=D200h
called by QEMM 6.03
----------2FD201BX5145-----------------------
INT 2F U - Quarterdeck - 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)
Notes: QEMM/QRAM/VIDRAM/MANIFEST will search for a free AH value from D2h
through FFh, then C0h through D1h
this call is not available under QEMM v6.00 unless Windows3 support
has been disabled with the NW3 switch to QEMM386.SYS
SeeAlso: AX=D201h/BX=4849h,INT 67/AH=3Fh
----------2FD201BX5649-----------------------
INT 2F U - Quarterdeck - 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
Note: QEMM/QRAM/VIDRAM/MANIFEST will search for a free AH value from D2h
through FFh, then C0h through D1h
Call VIDRAM entry point with:
AH = 00h get status
Return: AL = VIDRAM state (see below)
BL = bit 0: ???
bits 1-7 not used
BH = flags???
bit 4: high RAM exists in video area???
CL = current monitor (01h = mono, 80h = color)
SI = current top of memory (paragraph)???
DI = segment of ???
AH = 01h setup
AL = VIDRAM state (00h off, 01h no EGA graphics, 02h no graph)
BL = bit 0: ???
bits 1-7 not used
BH = flags???
CL = monitor (01h = monochrome, 80h = color)
SI = new top of memory (paragraph)???
AH = 02h get ???
Return: ES:DI -> ??? data
Return: CF set on error
CF clear if successful
----------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 = ???
----------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)
----------2FD44D-----------------------------
INT 2F - 4DOS.COM v2.1+ - API
AX = D44Dh
BH = function
00h installation check
Return: AX = 44DDh
BL = minor version number
BH = major 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: ES:BX -> data area (see below)
02h ???
DX = ???
---v2.1-3.03 only---
03h EXEC program
CX:DX -> EXEC record
FEh deallocate shell number (passed through to root shell)
???
FFh allocate shell number (passed through to root shell)
Note: bug in v3.00 will crash system if unrecognized value in BH
SeeAlso: AX=D44Eh,AX=E44Dh,INT 21/AX=4403h
Format of EXEC record:
Offset Size Description
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)
Format of 4DOS v4.0 data area:
Offset Size Description
00h 2 BYTEs ???
06h WORD XMS handle for swapping
???
----------2FD44E-----------------------------
INT 2F - 4DOS v3.0+ - AWAITING USER INPUT
AX = D44Eh
---4DOS v3.01+---
BX = 0000h 4DOS is ready to display prompt
= 0001h 4DOS has displayed the prompt, about to accept user input
Return: 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
----------2FD44FBX0000-----------------------
INT 2F - 4DOS v4.0+ - KSTACK.COM - INSTALLATION CHECK
AX = D44Fh
BX = 0000h
Return: AX = 44DDh if installed
SeeAlso: AX=D44Fh/BX=0001h
----------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.
SeeAlso: AX=D44Fh/BX=0000h,INT 16/AH=00h,INT 21/AX=4403h
----------2FD600-----------------------------
INT 2F - HEART.COM - INSTALLATION CHECK
AX = D600h
Return: AX = 0303h (two hearts) if installed
ES:DI -> buffer (see below)
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 buffer:
Offset Size Description
00h 8 WORDs table of colors/attributes (see 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)
----------2FD600-----------------------------
INT 2F U - VEDIT VSWAP - INSTALLATION CHECK
AX = D600h
Return: AL = D6h if installed
Note: 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
----------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"
----------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"
----------2FD701-----------------------------
INT 2F - BANYAN VINES v4+ - GET BANV INTERRUPT NUMBER
AX = D701h
Return: AX = 0000h 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
----------2FD702-----------------------------
INT 2F U - BANYAN VINES v4+ - PCPRINT interface
AX = D702h
BX = function
???
Return: ???
SeeAlso: AX=D701h,AX=D703h,INT 61/AX=0005h"Banyan"
----------2FD703-----------------------------
INT 2F U - BANYAN VINES v4+ - MAIL interface
AX = D703h
BX = function
???
Return: ???
SeeAlso: AX=D702h,AX=D704h
----------2FD704-----------------------------
INT 2F U - BANYAN VINES v4+ - Streettalk Directory Assistance interface
AX = D704h
BX = function
???
Return: ???
SeeAlso: AX=D703h,INT 61/AX=0007h"Banyan"
----------2FD800-----------------------------
INT 2F - Novell NetWare Lite - CLIENT.EXE - INSTALLATION CHECK
AX = D800h
Return: AL = FFh if installed
DX = version number??? (0100h in 1.00)
BX = data segment of resident copy???
ES:DI = FAR entry point for API routines
Load BX = function number and call for various
functions. Functions 00h - 10h supported in 1.00.
SeeAlso: AX=7A00h,AX=D880h
----------2FD880-----------------------------
INT 2F - Novell NetWare Lite - SERVER.EXE - INSTALLATION CHECK
AX = D880h
Return: AL = FFh if installed
DX = version number??? (0100h in 1.00)
BX = Data segment of resident copy???
CL = 01h if SERVER is active
= 00h if SERVER is disabled
SeeAlso: AX=7A00h,AX=D800h
----------2FDA00-----------------------------
INT 2F - ZyXEL ZFAX - INSTALLATION CHECK
AX = DA00h
Return: AH = enabled state (00h = enabled, 01h = disabled)
AL = 5Ah installed
Note: ZFAX is the bundled FAX software which comes with the ZyXEL model
fax modems.
SeeAlso: AX=CBDCh,AX=DA01h,AX=DA02h,AX=DA03h
----------2FDA01-----------------------------
INT 2F - ZyXEL ZFAX - UNINSTALL
AX = DA01h
Return: AL = 00h Success
01h Failure
SeeAlso: AX=DA00h
----------2FDA02-----------------------------
INT 2F - ZyXEL ZFAX - DISABLE
AX = DA02h
Return: AL = 00h
SeeAlso: AX=DA03h
----------2FDA03-----------------------------
INT 2F - ZyXEL ZFAX - ENABLE
AX = DA03h
Return: AL = 00h
SeeAlso: AX=DA02h
----------2FDA55-----------------------------
INT 2F U - TRAP.COM - INSTALLATION CHECK
AX = DA55h
DL = interrupt number
DH = ???
Return: if installed
AH = interrupt number
AL = ???
ES:BX -> ???
Notes: TRAP is an interrupt call tracer by Patrick Phillipot/Udo Chrosziel
a separate copy of TRAP is loaded for each interrupt to be traced; thus
the interrupt number is part of the installation check
----------2FDC00-----------------------------
INT 2F - GOLD.COM - INSTALLATION CHECK
AX = DC00h
Return: AL = 00h not installed
= FFh installed
Note: 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
----------2FDC01-----------------------------
INT 2F - GOLD.COM - GET STATE
AX = DC01h
Return: AL = status
00h off
01h on
SeeAlso: AX=DC00h,AX=DC02h
----------2FDC02-----------------------------
INT 2F - GOLD.COM - SET STATE
AX = DC02h
DL = new state
00h off
01h on
Return: AL = 00h (OK)
SeeAlso: AX=DC01h
----------2FDD-------------------------------
INT 2F - SoftCom programs - API
AH = DDh
AL = FEh get info
Return: ES:BX -> TSR info list (see below)
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
Format of TSR info list:
Offset Size Description
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
----------2FDE00BX4445-----------------------
INT 2F - DESQview v2.26+ External Device Interface - INSTALLATION CHECK
AX = DE00h
BX = 4445h ("DE")
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")
Notes: AH=DEh is the default XDI multiplex number, but may range from C0h-FFh
programs should check for XDI starting at DEh to FFh, then C0h to DDh
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
----------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
----------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
Note: the installation check consists of testing for the existence of the
character device QDPMI$$$
----------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
CX = version number (CH = major, CL = minor)
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.
----------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
----------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 below)
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.
Format of information for one process (v1.00):
Offset Size Description
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
0Bh DWORD hook for other programs
Format of information for one process (v1.10-v2.00):
Offset Size Description
00h BYTE flags
bit 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)
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+
----------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
----------2FDE02-----------------------------
INT 2F - DESQview v2.26+ External Device 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
----------2FDE03-----------------------------
INT 2F - DESQview v2.26+ External Device 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
----------2FDE04-----------------------------
INT 2F - DESQview v2.26+ External Device Interface - ADD PROCESS
AX = DE04h
BX = mapping context of new process
DX = handle of process
Return: nothing
Notes: XMS XDI handler (installed by default) allocates a 22-byte record
(see below) 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
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
(FAR jump to next field)
10h 6 BYTEs FAR handler for XMS driver entry point
(consists of a FAR CALL followed by RETF)
----------2FDE05-----------------------------
INT 2F - DESQview v2.26+ External Device Interface - REMOVE PROCESS
AX = DE05h
BX = mapping context of process
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
----------2FDE06-----------------------------
INT 2F - DESQview v2.26+ External Device 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
----------2FDE07-----------------------------
INT 2F - DESQview v2.26+ External Device 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
----------2FDE08-----------------------------
INT 2F - DESQview v2.26+ External Device Interface - SAVE STATE
AX = DE08h
BX = mapping context of task being switched from
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
----------2FDE09-----------------------------
INT 2F - DESQview v2.26+ External Device Interface - RESTORE STATE
AX = DE09h
BX = mapping context of task being switched to
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
----------2FDE0A-----------------------------
INT 2F - DESQview v2.26+ External Device 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
SeeAlso: INT 15/AX=DE26h,INT 15/AX=DE2Fh
----------2FDE0B-----------------------------
INT 2F - DESQview v2.26+ External Device 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
----------2FDE0C-----------------------------
INT 2F - DESQview v2.26+ External Device Interface - SWAP OUT PROCESS
AX = DE0Ch
BX = mapping context of task being swapped out
DX = handle of DESQview system task
Note: driver should pass this call to previous handler after processing it
----------2FDE0D-----------------------------
INT 2F - DESQview v2.26+ External Device Interface - SWAP IN PROCESS
AX = DE0Dh
BX = mapping context of process just swapped in
DX = handle of DESQview system task
Note: driver should pass this call to previous handler before processing it
----------2FDE0E-----------------------------
INT 2F - DESQview v2.26+ External Device 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
----------2FDE0F-----------------------------
INT 2F - DESQview v2.50+ External Device 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
----------2FDE10-----------------------------
INT 2F - DESQview v2.50+ External Device Interface - FREE TASK
AX = DE10h
BX = mapping context of process
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
----------2FDF--BX4448-----------------------
INT 2F U - HyperDisk v4.20+ - INSTALLATION CHECK
AH = DFh
BX = 4448h ('DH')
Return: AL = FFh if installed
CX = 5948h ('YH')
BX:DX -> ??? in resident portion if BX=4448h on entry
Note: HyperDisk is a shareware disk cache by HyperWare (Roger Cross)
SeeAlso: INT 13/AX=8EEDh
----------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 MSDOS SETVER
Note: this installation check differs from the usual one of returning AL=FFh
SeeAlso: AX=E001h,INT 21/AH=52h
----------2FE001-----------------------------
INT 2F - SETDRVER.COM v2.10+ - GET SETDRVER VERSION
AX = E001h
Return: AH = major version
AL = minor version
SeeAlso: AX=E000h
----------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
----------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
----------2FE004-----------------------------
INT 2F - SETDRVER.COM v2.10+ - ENABLE TSR
AX = E004h
Return: AL = FFh if successful
SeeAlso: AX=E000h,AX=E005h,AX=E006h
----------2FE005-----------------------------
INT 2F - SETDRVER.COM v2.10+ - DISABLE TSR
AX = E005h
Return: AL = FFh if successful
SeeAlso: AX=E000h,AX=E004h,AX=E006h
----------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
----------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
----------2FE0-------------------------------
INT 2F - SETDRVER.COM - RESERVED FOR FUTURE USE
AH = E0h
AL = 08h-10h
----------2FE300-----------------------------
INT 2F - ANARKEY.COM - INSTALLATION CHECK
AX = E300h
Return: AL = 00h not installed
FEh if installed but suspended (v3.0+)
FFh installed
Notes: ANARKEY.COM is a commandline recall program by Steven Calwas
E3h is the default function number, but can be set to any value from
C0h to FFh
SeeAlso: AX=E301h,AX=E302h,AX=E303h,AX=E304h,AX=E305h,AX=E306h,AX=E307h
----------2FE301-----------------------------
INT 2F U - ANARKEY.COM v2+ - GET ???
AX = E301h
Return: DX:BX -> ???
SeeAlso: AX=E300h
Format of returned data structure for ANARKEY v2.0:
Offset Size Description
-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
-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
----------2FE302-----------------------------
INT 2F U - ANARKEY.COM v3+ - ???
AX = E302h
BL = ???
Return: ???
SeeAlso: AX=E300h
----------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
----------2FE304-----------------------------
INT 2F U - ANARKEY.COM v2+ - ???
AX = E304h
BL = ???
Return: ???
SeeAlso: AX=E300h
----------2FE305-----------------------------
INT 2F U - ANARKEY.COM v3+ - ENABLE/SUSPEND ANARKEY
AX = E305h
BL = new state
01h suspended
00h enabled
SeeAlso: AX=E300h
----------2FE306-----------------------------
INT 2F U - ANARKEY.COM v4.0 - GET ???
AX = E306h
Return: AX = ???
SeeAlso: AX=E300h
----------2FE307-----------------------------
INT 2F U - ANARKEY.COM v4.0 - GET ???
AX = E307h
Return: AX = ???
BL = ???
SeeAlso: AX=E300h
----------2FE44D-----------------------------
INT 2F - NDOS - API
AX = E44Dh
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
----------2FE44EBX0000-----------------------
INT 2F - NDOS - AWAITING USER INPUT
AX = E44Eh
BX = 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
----------2FED00-----------------------------
INT 2F - Phar Lap DOS EXTENDERS - INSTALLATION CHECK
AX = ED00h
BL = DOS extender
01h 286dosx v1.3+ (Software Development Kit)
02h 286dosx v1.3+ (Run-Time Kit)
03h 386dosx v4.0+ (SDK)
04h 386dosx v4.0+ (RTK)
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
1: running under Phar Lap VMM
SeeAlso: AH=A1h,AX=F100h,AX=FBA1h
----------2FED80-----------------------------
INT 2F - Phar Lap 286|DOS Extender Lite v2.5 - ???
AX = ED80h
BL = DOS extender ID (see AX=ED00h)
SI = 5048h ("PH")
DI = 4152h ("AR")
???
Return: ???
----------2FEE00-----------------------------
INT 2F - GRIDLOC.EXE - INSTALLATION CHECK
AX = EE00h
Return: AL = FFh if installed
Note: GRIDLOC is a PC security program by Intelligent Security Systems, Inc.
----------2FF000-----------------------------
INT 2F U - 4MAP - INSTALLATION CHECK
AX = F000h
Return: AX = 00FFh
Notes: returns AX=00FFh for any value of AL not listed here
4MAP is a keybinding program for 4DOS (see AX=D44Dh) by Ho-Ping Tseng
----------2FF001-----------------------------
INT 2F U - 4MAP - GET KEY MAPPINGS
AX = F001h
Return: ES:BX -> key mappings
SeeAlso: AX=F000h
----------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
----------2FF003-----------------------------
INT 2F U - 4MAP - INSERT CHARACTER INTO ???
AX = F003h
BL = character to insert
Return: AX = status
0000h successful
0001h buffer full
SeeAlso: AX=F000h,AX=F002h
----------2FF1-------------------------------
INT 2F U - MIN-MEM v2.11 - INSTALLATION CHECK
AH = F1h
AL <> F1h
Return: AL = F1h if installed
Note: 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.
----------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
----------2FF700-----------------------------
INT 2F - AUTOPARK.COM - INSTALLATION CHECK
AX = F700h
Return: AL = 00h not installed
FFh installed
Note: AUTOPARK.COM is a resident hard disk parker by Alan D. Jones
----------2FF701-----------------------------
INT 2F - AUTOPARK.COM - SET PARKING DELAY
AX = F701h
BX:CX = 32-bit count of 55ms timer ticks
----------2FFB-------------------------------
INT 2F - Multiplex - RESERVED BY BORLAND INTERNATIONAL
AH = FBh
----------2FFB00-----------------------------
INT 2F U - AutoBraille v1.1A - INSTALLATION CHECK
AX = FB00h
Return: AX = 00FFh if installed
Note: AutoBraille is a shareware text-to-braille converter by KANSYS, Inc.
SeeAlso: INT 10/AH=38h,INT 14/AX=F0F1h
----------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"
----------2FFB01-----------------------------
INT 2F U - AutoBraille v1.1A - ???
AX = FB01h
???
Return: ???
----------2FFB01-----------------------------
INT 2F U - Jot-It! v1.50 - GET USER NAME
AX = FB01h
Return: DX:BX -> ASCIZ user name
SeeAlso: AX=FB02h"Jot-It"
----------2FFB02-----------------------------
INT 2F U - AutoBraille v1.1A - ???
AX = FB02h
Return: AH = ???
AL = ???
----------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"
----------2FFB03-----------------------------
INT 2F U - AutoBraille v1.1A - GET NEXT ???
AX = FB03h
Return: AX = ???
----------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"
----------2FFB-------------------------------
INT 2F U - AutoBraille v1.1A - SET ???
AH = FBh
AL = 04h-08h
Return: AX = 0000h
----------2FFB-------------------------------
INT 2F U - AutoBraille v1.1A - SET ???
AH = FBh
AL = 09h-0Fh (???, 0Eh = COM1, 0Fh = COM2)
Return: ???
Note: AutoBraille is a shareware text-to-braille converter by KANSYS, Inc.
----------2FFB-------------------------------
INT 2F U - AutoBraille v1.1A - SET ???
AH = FBh
AL = 10h-1Fh
???
Return: ???
----------2FFB20-----------------------------
INT 2F U - AutoBraille v1.1A - SET ??? FLAGS
AX = FB20h
BL = flags to set
SeeAlso: AX=FB21h"AutoBraille"
----------2FFB21-----------------------------
INT 2F U - AutoBraille v1.1A - CLEAR ??? FLAGS
AX = FB21h
BL = flags to clear
SeeAlso: AX=FB20h"AutoBraille"
----------2FFB22-----------------------------
INT 2F U - AutoBraille v1.1A - SET ???
AX = FB22h
BL = ???
Note: AutoBraille is a shareware text-to-braille converter by KANSYS, Inc.
----------2FFB28-----------------------------
INT 2F U - AutoBraille v1.1A - ???
AX = FB28h
BX = ???
???
Return: ???
SeeAlso: AX=FB29h"AutoBraille"
----------2FFB29-----------------------------
INT 2F U - AutoBraille v1.1A - ???
AX = FB29h
BX = ???
???
Return: ???
SeeAlso: AX=FB28h"AutoBraille"
----------2FFB-------------------------------
INT 2F U - AutoBraille v1.1A - SET ???
AH = FBh
AL = 2Bh-34h
BX = ???
----------2FFB35-----------------------------
INT 2F U - AutoBraille v1.1A - SET ???
AX = FB35h
BL = ???
----------2FFB36-----------------------------
INT 2F U - AutoBraille v1.1A - SET ???
AX = FB36h
BL = ???
----------2FFB37-----------------------------
INT 2F U - AutoBraille v1.1A - SET ???
AX = FB37h
BL = ???
Note: AutoBraille is a shareware text-to-braille converter by KANSYS, Inc.
----------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
----------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
----------2FFB42BX0002-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ALLOCATE MEMORY
AX = FB42h
BX = 0002h
ES:SI -> memory block info (see below)
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
Format of memory block info:
Offset Size Description
00h WORD flags
bit 0: set if data segment rather than code segment
bit 1: information valid
bit 2: set if DOS memory block rather than DPMI memory block
bit 4: ???
bit 15: set if no LDT selectors for memory block???
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???
----------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
----------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 below)
Note: the filename may also be terminated by a CR rather than a NUL under the
BC++ 3.0 version of DPMILOAD
Values for 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
----------2FFB42BX0005-----------------------
INT 2F PU - Borland C++ DPMILOAD.EXE - GET ADDRESS OF ??? BY NAME
AX = FB42h
BX = 0005h
CX = selector of DPMILOAD data (see below)
DS:DX -> ASCIZ or CR-terminated name of ??? (case ignored)
Return: DX = status (see AX=FB42h/BX=0004h)
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
00h 12 BYTEs ???
0Ch WORD ??? bit flags
0Eh 14 BYTEs ???
1Ch WORD number of memory control records
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 below)
54h 4 BYTEs ???
58h WORD offset of array of 6-byte objects
5Ah 8 BYTEs ???
62h 9 BYTEs ASCIZ name for ???
6Bh 9 BYTEs ASCIZ name for ???
???
Format of name list entry [array]:
Offset Size Description
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
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
00h 20 BYTEs memory block info (see AX=FB42h/BX=0002h)
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
----------2FFB42BX0006-----------------------
INT 2F PU - Borland C++ DPMILOAD.EXE - GET ADDRESS OF ??? BY NUMBER
AX = FB42h
BX = 0006h
CX = selector of DPMILOAD data (see AX=FB42h/BX=0005h)
DX = 1-based index into array of ??? 6-byte objects
Return: DX = status (see AX=FB42h/BX=0004h)
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
----------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.
----------2FFB42BX0007-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
AX = FB42h
BX = 0007h
CX = selector of DPMILOAD data (see AX=FB42h/BX=0005h)
???
Return: DX = status (see AX=FB42h/BX=0004h)
0000h successful
AX = ???
----------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
----------2FFB42BX0008-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - FREE MEMORY BLOCK
AX = FB42h
BX = 0008h
ES:SI -> memory block info (see AX=FB42h/BX=0002h"3.0")
Return: ???
SeeAlso: AX=FB42h/BX=0009h
----------2FFB42BX0009-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - RESIZE MEMORY BLOCK
AX = FB42h
BX = 0009h
ES:SI -> memory block info (see AX=FB42h/BX=0002h"3.0")
???
Return: ???
SeeAlso: AX=FB42h/BX=0008h"3.0"
----------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
----------2FFB42BX000B-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - UNUSED
AX = FB42h
BX = 000Bh
----------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 AX=FB42h/BX=0002h"3.0")
Return: DX = status???
SeeAlso: AX=FB42h/BX=000Fh
----------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 INT 31/AX=0300h)
Return: CX = status
0000h successful
0001h failed
SeeAlso: INT 31/AX=0300h
----------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 AX=FB42h/BX=0005h) corresponding to
name, 0000h on error
SeeAlso: AX=FB42h/BX=0006h,AX=FB42h/BX=001Fh
----------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 AX=FB42h/BX=0002h"3.0")
Return: ???
SeeAlso: AX=FB42h/BX=000Ch
----------2FFB42BX0010-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - CONVERT SEGMENT TO SELECTOR
AX = FB42h
BX = 0010h
DX = segment number
Return: CX = status (see also AX=FB42h/BX=0004h)
0000h successful
DX = selector number for descriptor
0008h failed
SeeAlso: AX=FB42h/BX=0023h
----------2FFB42BX0011-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
AX = FB42h
BX = 0011h
CX = selector of DPMILOAD data (see AX=FB42h/BX=0005h)
???
Return: DX = status (see also AX=FB42h/BX=0004h)
0000h successful
AX:BX -> ??? name
0002h invalid selector
FFFEh ??? error
----------2FFB42BX0012-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
AX = FB42h
BX = 0012h
CX = selector for ???
Return: CX = selector for ???
----------2FFB42BX0013-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
AX = FB42h
BX = 0013h
CX = selector of DPMILOAD data (see AX=FB42h/BX=0005h)
DX = 1-based index of ???
Return: CX = status (see also AX=FB42h/BX=0004h)
0000h successful
BX = ??? or 0000h
0002h invalid selector
FFF9h ??? error
----------2FFB42BX0014-----------------------
INT 2F RU - Borland C++ 3.0 DPMILOAD.EXE - ???
AX = FB42h
BX = 0014h ???
CX = 0001h
Return: BX = 0000h
Note: unlike most of the DPMILOAD functions, this call is available only in
real or V86 mode
SeeAlso: AX=FB42h/BX=000Ah
----------2FFB42BX0015-----------------------
INT 2F RU - Borland C++ 3.0 DPMILOAD.EXE - ???
AX = FB42h
BX = 0015h uninstall
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
----------2FFB42BX0016-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - GET ???
AX = FB42h
BX = 0016h
CX = selector of DPMILOAD data (see AX=FB42h/BX=0005h)
Return: DX = status (see also AX=FB42h/BX=0004h)
0000h successful
CX = ???
----------2FFB42BX0017-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
AX = FB42h
BX = 0017h
CX = ???
DX = ???
???
Return: DX = status (0000h,0001h) (see below)
----------2FFB42BX0018-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - SET ???
AX = FB42h
BX = 0018h
CX = ???
----------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 ???
----------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 -> ???
----------2FFB42BX001B-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
AX = FB42h
BX = 001Bh
CX = selector of DPMILOAD data (see AX=FB42h/BX=0005h)
DX = offset of ???
Return: DX = status (see also AX=FB42h/BX=0004h)
0000h successful
BX = selector for ???
CX = selector for ???
0002h invalid selector
----------2FFB42BX001C-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
AX = FB42h
BX = 001Ch
ES = selector for DPMILOAD data (see AX=FB42h/BX=0005h)
CX = 1-based index of ???
DX = 1-based index of ???
Return: DX = status (0000h,0002h,FFF9h) (see AX=FB42h/BX=0004h)
----------2FFB42BX001D-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - GET ???
AX = FB42h
BX = 001Dh
Return: CX:DX = ???
----------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 -> ???
----------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 AX=FB42h/BX=0005h) for ???
0000h on error
SeeAlso: AX=FB42h/BX=000Eh
----------2FFB42BX0020-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - NULL FUNCTION???
AX = FB42h
BX = 0020h
Return: DX = ??? (always 0000h)
----------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
----------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 AX=FB42h/BX=0004h)
SeeAlso: AX=FB42h/BX=0021h,AX=FB42h/BX=0025h,INT 31/AX=0203h
----------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
----------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
----------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 AX=FB42h/BX=0004h)
SeeAlso: AX=FB42h/BX=0024h,INT 31/AX=0205h
----------2FFB42BX0026-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ???
AX = FB42h
BX = 0026h
CX = selector of DPMILOAD data (see AX=FB42h/BX=0005h)
DX = 1-based index of ???
???
Return: DX = status (0000h,0002h,FFF9h) (see AX=FB42h/BX=0004h)
0000h successful
BX = offset of ??? within data structure
----------2FFB42BX0027-----------------------
INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - GET ???
AX = FB42h
BX = 0027h
CX = selector of DPMILOAD data (see AX=FB42h/BX=0005h)
DX = offset of ???
Return: DX = status (see also AX=FB42h/BX=0004h)
0000h successful
BX = ???
----------2FFB42BX0080-----------------------
INT 2F U - ??? - CALLED BY Borland C++ 3.0 DPMILOAD.EXE
AX = FB42h
BX = 0080h
???
Return: AX = ???
???
----------2FFB42BX0081-----------------------
INT 2F U - ??? - CALLED BY Borland C++ 3.0 DPMILOAD.EXE
AX = FB42h
BX = 0081h
???
Return: AX = ???
???
----------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
----------2FFB64-----------------------------
INT 2F U - AutoBraille v1.1A - GET ???
AX = FB64h
Return: AX = ??? (0006h seen)
Note: AutoBraille is a shareware text-to-braille converter by KANSYS, Inc.
----------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"
Note: TKERNEL is a licensed version of AI Architects/Ergo's OS/x86. It 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"TKERNEL"
----------2FFBA1BX0082-----------------------
INT 2F U - TKERNEL (Borland DOS extender) - GET ENTRY POINT
AX = FBA1h
BX = 0082h
ES:DI -> response buffer (see below)
Return: ES:DI buffer filled
SeeAlso: AX=FBA1h/BX=0081h,AX=FBA1h/BX=0084h
Format of response buffer:
Offset Size Description
00h 4 BYTEs signature "IABH"
04h DWORD pointer to FAR extender entry point
Call 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 ???
(return) 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 (see 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) ???
(return) 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
----------2FFBA1BX0084-----------------------
INT 2F U - TKERNEL (Borland DOS extender) - UNINSTALL
AX = FBA1h
BX = 0084h
ES:DI -> response buffer (see below)
Return: ES:DI buffer filled
SeeAlso: AX=FBA1h/BX=0081h,AX=FBA1h/BX=0084h
Format of response buffer:
Offset Size Description
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
----------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 below)
SeeAlso: INT 80/BX=0000h,INT F3"SoundBlaster"
Format of entry point data structure:
Offset Size Description
00h 3 BYTEs signature "FB "
03h BYTE driver major version number???
04h DWORD speech driver entry point
08h 24 BYTEs ???
20h ? BYTEs data buffer for calling speech driver
Call driver entry point with:
AL = function
07h speak a string
data buffer (see above) contains:
BYTE length of string
N BYTEs string to speak
----------2FFE00DI4E55-----------------------
INT 2F U - NORTON UTILITIES 5.0+ TSRs - INSTALLATION CHECK/STATUS REPORT
AX = FE00h
DI = 4E55h ("NU")
SI = TSR identifier
4346h ("CF") NCACHE-F (v5) / NCACHE (v6.0+)
4353h ("CS") NCACHE-S (v5 only)
4443h ("DC") DISKREET
444Dh ("DM") DISKMON
4653h ("FS") FILESAVE (v5) / EP (v6.0+)
Return: SI = TSR reply
lowercase version of SI on entry (i.e. SI OR 2020h)
AH = status
00h installed but disabled internally
01h installed and enabled
AL = status
00h NCACHE-x or DISKREET installed
01h FILESAVE / EP / DISKMON v6 installed
45h DISKMON v5 installed
BX = length of *.INI file (DISKMON and FILESAVE/EP only) (see below)
CX = segment of resident portion
FFFFh if completely loaded high (NCACHE)
---FILESAVE/EP---
DL = ??? (apparently always 00h)
---DISKMON---
DX = ??? (apparently always 1AE6h [v5] / 1B86h [v6])
Note: the value returned in CX is incorrect for NCACHE 6.00
SeeAlso: AX=FE01h,AX=FE02h,AX=FE03h,AX=FE04h,AX=FE05h
Format of DISKMON.INI file:
Offset Size Description
-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)
Format of FILESAVE.INI / EP.INI file:
Offset Size Description
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 (v5.0)
CX:03F5h -> copy in installed TSR (v6.0)
----------2FFE01DI4E55-----------------------
INT 2F U - NORTON UTILITIES 5.0+ TSRs - ENABLE
AX = FE01h
DI = 4E55h ("NU")
SI = TSR identifier (see AX=FE00h)
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
----------2FFE02DI4E55-----------------------
INT 2F U - NORTON UTILITIES 5.0+ TSRs - DISABLE
AX = FE02h
DI = 4E55h ("NU")
SI = TSR identifier (see AX=FE00h)
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)
Note: (see AX=FE01h)
SeeAlso: AX=FE00h,AX=FE01h
----------2FFE03DI4E55-----------------------
INT 2F U - NORTON UTILITIES 5.0+ TSRs - internal - ???
AX = FE03h
DI = 4E55h ("NU")
SI = TSR identifier (see AX=FE00h)
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
reportedly dangerous
SeeAlso: AX=FE00h
----------2FFE04DI4E55-----------------------
INT 2F U - NORTON UTILITIES 5.0+ DISKMON, FILESAVE / EP - internal - ???
AX = FE04h
DI = 4E55h ("NU")
SI = TSR identifier (see AX=FE00h)
Return: SI = TSR reply (lowercase version of entry SI, i.e. SI or 2020h)
AX = status
0008h successful???
SeeAlso: AX=FE00h
----------2FFE05DI4E55-----------------------
INT 2F U - NORTON UTILITIES 5.0+ DISKMON, FILESAVE / EP - internal - ???
AX = FE05h
DI = 4E55h ("NU")
SI = TSR identifier (see AX=FE00h)
Return: SI = TSR reply (lowercase version of entry SI, i.e. SI or 2020h)
AX = status
000Ah successful???
Note: reportedly dangerous
SeeAlso: AX=FE00h
----------2FFF00-----------------------------
INT 2F - Topware Network Operating System - INSTALLATION CHECK
AX = FF00h
Return: AL = 00h not installed, OK to install
= 01h not installed, not OK to install
= FFh installed
SeeAlso: AX=FF01h,INT 21/AH=FFh"Topware",INT 7A"Topware"
----------2FFF01-----------------------------
INT 2F - Topware Network Operating System - GET VERSION
AX = FF01h
Return: AX = version
SeeAlso: AX=FF00h
----------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
----------31---------------------------------
INT 31 - overwritten by CP/M jump instruction in INT 30
----------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+)
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
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
----------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 AX=0000h)
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
----------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 AX=0000h)
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
----------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
----------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
----------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
----------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 AX=0000h)
Note: not supported by MS Windows 3.0 in Standard mode
SeeAlso: AX=0007h
----------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 AX=0000h)
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"
----------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 AX=0000h)
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/AH=E9h"OS/286"
----------310009-----------------------------
INT 31 P - DPMI 0.9+ - SET DESCRIPTOR ACCESS RIGHTS
AX = 0009h
BX = selector
CL = access rights/type byte
CH = 80386 extended rights/type byte (32-bit DPMI implementations only)
Return: CF clear if successful
CF set on error
AX = error code (DPMI 1.0+) (8021h,8022h,8025h) (see AX=0000h)
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
----------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 AX=0000h)
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
----------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 AX=0000h)
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
----------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 AX=0000h)
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
----------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 AX=0000h)
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
----------31000E-----------------------------
INT 31 P - DPMI 1.0+ - GET MULTIPLE DESCRIPTORS
AX = 000Eh
CX = number of descriptors to copy
ES:(E)DI -> descriptor buffer (see below)
Return: CF clear if successful
descriptors copied
CF set on error
AX = error code (8022h) (see AX=0000h)
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 descriptor buffer entry (one per descriptor to get):
Offset Size Description
00h WORD selector (set by client)
02h QWORD descriptor (set by host)
----------31000F-----------------------------
INT 31 P - DPMI 1.0+ - SET MULTIPLE DESCRIPTORS
AX = 000Fh
CX = number of descriptors to copy
ES:(E)DI -> descriptor buffer (see below)
Return: CF clear if successful
descriptors copied
CF set on error
AX = error code (8021h,8022h,8025h) (see AX=0000h)
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 descriptor buffer entry (one per descriptor to set):
Offset Size Description
00h WORD selector
02h QWORD descriptor
----------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 INT 21/AH=59h)
(DPMI 1.0+) DPMI error code (8011h) (see AX=0000h)
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
----------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 INT 21/AH=59h)
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
----------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 INT 21/AH=59h)
(DPMI 1.0+) DPMI error code (8011h,8022h) (see AX=0000h)
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
----------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
----------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
----------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 AX=0000h)
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
----------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 AX=0000h)
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 below)
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
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
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)
----------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 2F/AX=FB42h/BX=0024h
----------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 AX=0000h)
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 2F/AX=FB42h/BX=0025h
----------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:(EDX) = selector:offset of exception handler
CF set on error
AX = error code (8021h) (see AX=0000h)
Note: DPMI host reflects exception to current client's handler
SeeAlso: AX=0202h,AX=0211h,AX=0212h
----------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:(EDX) = selector:offset of exception handler
CF set on error
AX = error code (8021h) (see AX=0000h)
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
----------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 AX=0000h)
Note: DPMI host sends exception to current client's handler
SeeAlso: AX=0203h,AX=0210h,AX=0213h
----------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 AX=0000h)
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
----------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 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 below)
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 AX=0000h)
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,INT 21/AX=2511h,INT 21/AH=E3h"OS/286"
SeeAlso: INT 2F/AX=FB42h/BX=000Dh
Format of real mode call structure:
Offset Size Description
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
----------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 must be 0
CX = number of words to copy from protected mode to real mode stack
ES:DI / ES:EDI = selector:offset of real mode call structure
(see 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 AX=0000h)
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,INT 21/AX=250Eh,INT 21/AH=E1h"OS/286"
----------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 must be 0
CX = number of words to copy from protected mode to real mode stack
ES:DI / ES:EDI = selector:offset of real mode call structure
(see 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 AX=0000h)
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
----------310303-----------------------------
INT 31 P - DPMI 0.9+ - ALLOCATE REAL MODE CALLBACK ADDRESS
AX = 0303h
DS:SI / DS:ESI = selector:offset of procedure to call
ES:DI / ES:EDI = selector:offset of real mode call structure
(see AX=0300h)
Return: CF clear if successful
CX:DX = segment:offset of real mode call address
CF set on error
AX = error code (DPMI 1.0+) (8015h) (see AX=0000h)
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
SeeAlso: AX=0304h,AX=0C00h
Values callback procedure is called with:
DS:SI / DS:ESI = selector:offset of real mode SS:SP
ES:DI / ES:EDI = selector:offset of real mode call structure
SS:SP / SS:ESP = locked protected mode API stack
interrupts disabled
Return: (with IRET)
ES:DI / ES:EDI = selector:offset of real mode call structure to restore
----------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 AX=0000h)
SeeAlso: AX=0303h
----------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:DI / SI:EDI = protected mode procedure to save/restore state
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
Values to call state-save procedures with:
AL = direction
00h save state
01h restore state
ES:DI / ES:EDI -> state buffer
Return: all registers preserved
----------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
SI:DI / SI:EDI -> 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
Values to JUMP at mode-switch procedures with:
AX = new DS
CX = new ES
DX = new SS
BX / EBX = new SP / ESP
SI = new CS
DI / EDI = new IP / EIP
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
----------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 = flags
bit 0: running under an 80386 (32-bit) implementation
bit 1: processor returns to real mode for reflected interrupts
instead of V86 mode
bit 2: virtual memory supported
bit 3: reserved (undefined)
others reserved (zero)
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
SeeAlso: AX=0401h,INT 21/AX=250Ch,INT 67/AX=DE0Ah
----------310401-----------------------------
INT 31 P - DPMI 1.0+ - GET DPMI CAPABILITIES
AX = 0401h
ES:(E)DI -> 128-byte buffer (see below)
Return: CF clear if successful
AX = capabilities
bit 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
CX = reserved (00h)
DX = reserved (00h)
buffer filled
CF set on error (DPMI 0.9 only)
SeeAlso: AX=0400h
Format of buffer:
Offset Size Description
00h BYTE host major version number
01h BYTE host minor version number
02h 126 BYTEs ASCIZ host vendor name
----------310500-----------------------------
INT 31 P - DPMI 0.9+ - GET FREE MEMORY INFORMATION
AX = 0500h
ES:DI / ES:EDI -> buffer for memory information (see below)
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
SeeAlso: AX=0501h,AX=0604h
Format of memory information:
Offset Size Description
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
----------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 AX=0000h)
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)
SeeAlso: AX=0000h,AX=0100h,AX=0500h,AX=0502h,AX=0503h,AX=0504h,AX=0D00h
----------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 AX=0000h)
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
----------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 AX=0000h)
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
----------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 AX=0000h)
Note: only supported by 32-bit DPMI hosts, but may be used by 16-bit clients
SeeAlso: AX=0501h,AX=0505h
----------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 AX=0000h)
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
----------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 below)
Return: CF clear if successful
buffer filled
CF set on error
AX = error code (8001h,8023h,8025h) (see AX=0000h)
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
Format of page attribute words:
bits 0-2 page type
000 uncommitted
001 committed
010 mapped (see AX=0508h,AX=0509h)
other currently unused
bit 3 page is read/write rather than read-only
bit 4 accessed/dirty bits supplied in bits 5 and 6
bit 5 page has been accessed (only valid if bit 4 set)
bit 6 page has been written (only valid if bit 4 set)
bits 7-15 reserved (0)
----------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 AX=0506h)
Return: CF clear if successful
CF set on error
AX = error code (8001h,8002h,8013h,8014h,8021h,8023h,8025h)
(see AX=0000h)
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
----------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 AX=0000h)
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
----------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 AX=0000h)
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
----------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 AX=0000h)
SeeAlso: AX=0501h,AX=0504h
----------31050B-----------------------------
INT 31 P - DPMI 1.0+ - GET MEMORY INFORMATION
AX = 050Bh
ES:(E)DI -> 128-byte buffer for memory information (see below)
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 memory information:
Offset Size Description
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)
----------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 AX=0000h)
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
----------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 AX=0000h)
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
----------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 AX=0000h)
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
----------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 AX=0000h)
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
----------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+)
8001h unsupported, 16-bit host
----------310700-----------------------------
INT 31 P - 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
----------310701-----------------------------
INT 31 P - 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
----------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 AX=0000h)
Notes: this function is advisory, and does not force immediate paging
partial pages will not be discarded
SeeAlso: AX=0700h,AX=0703h
----------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 AX=0000h)
Notes: this function is advisory, and may be ignored by DPMI implementations
partial pages will not be discarded
SeeAlso: AX=0701h,AX=0702h
----------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 AX=0000h)
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
----------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 AX=0000h)
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
----------310900-----------------------------
INT 31 P - DPMI 0.9+ - GET AND DISABLE VIRTUAL INTERRUPT STATE
AX = 0900h
Return: CF clear
virtual interrupts disabled
AL = 00h if previously disabled
= 01h if previously 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
----------310901-----------------------------
INT 31 P - DPMI 0.9+ - GET AND ENABLE VIRTUAL INTERRUPT STATE
AX = 0901h
Return: CF clear
virtual interrupts enabled
AL = 00h if previously disabled
= 01h if previously 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
----------310902-----------------------------
INT 31 P - DPMI 0.9+ - GET VIRTUAL INTERRUPT STATE
AX = 0902h
Return: CF clear
AL = 00h if disabled
= 01h if 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
----------310A00-----------------------------
INT 31 P - DPMI 0.9+ - GET VENDOR SPECIFIC API ENTRY POINT
AX = 0A00h
DS:SI / DS:ESI -> case-sensitive ASCIZ vendor name or identifier
Return: CF clear if successful
ES:DI / ES:EDI -> 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 AX=0000h)
Notes: extended API parameters are vendor-specific
DPMI 1.0+ supports this function solely for backward compatibility; use
INT 2F/AX=168Ah instead
SeeAlso: INT 2F/AX=168Ah
----------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 AX=0000h)
SeeAlso: AX=0212h,AX=0601h
----------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 AX=0000h)
Note: the watchpoint handle is freed
SeeAlso: AX=0B00h
----------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 AX=0000h)
SeeAlso: AX=0B00h,AX=0B03h
----------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 AX=0000h)
SeeAlso: AX=0B02h
----------310C00-----------------------------
INT 31 P - DPMI 1.0+ - INSTALL RESIDENT HANDLER INIT CALLBACK
AX = 0C00h
ES:(E)DI -> resident service provider structure (see below)
Return: CF clear if successful
CF set on error
AX = error code (8015h,8021h,8025h) (see 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 resident service provider structure:
Offset Size Description
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
----------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
----------310D00-----------------------------
INT 31 P - DPMI 1.0+ - ALLOCATE SHARED MEMORY
AX = 0D00h
ES:(E)DI -> shared memory allocation request structure (see below)
Return: CF clear if successful
request structure updated
CF set on error
AX = error code (8012h,8013h,8014h,8016h,8021h) (see AX=0000h)
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 shared memory allocation request structure:
Offset Size Description
00h DWORD requested length of shared memory block in bytes
04h DWORD (return) allocated length of block
08h DWORD (return) shared memory handle
0Ch DWORD (return) linear address of memory block
10h 6 BYTEs selector:offset32 of ASCIZ name for memory block
(name max 128 bytes)
16h 2 BYTEs reserved
18h 4 BYTEs reserved (00h)
----------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 AX=0000h)
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
----------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
1: shared rather than exclusive serialization
2-15: reserved (0)
Return: CF clear if successful
CF set on error
AX = error code (8004h,8005h,8017h-8019h,8023h) (see AX=0000h)
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
----------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 AX=0000h)
SeeAlso: AX=0D00h,AX=0D02h
----------310E00-----------------------------
INT 31 P - DPMI 1.0+ - GET COPROCESSOR STATUS
AX = 0E00h
Return: CF clear
AX = coprocessor status
bit 0: numeric coprocessor enabled for current client
bit 1: client is emulating coprocessor
bit 2: numeric coprocessor is present
bit 3: host is emulating coprocessor instructions
bits 4-7: coprocessor type
0000 none
0010 80287
0011 80387
0100 80486 with numeric coprocessor
other reserved
bits 8-15: not used
Note: supported by 386MAX v6.01, which otherwise only supports DPMI 0.9
SeeAlso: AX=0E01h
----------310E01-----------------------------
INT 31 P - DPMI 1.0+ - SET EMULATION
AX = 0E01h
BX = coprocessor flag bits
bit 0: enable numeric coprocessor for current client
bit 1: client will emulate coprocessor
bits 2-15: not used
Return: CF clear if successful
CF set on error
AX = error code (8026h) (see AX=0000h)
Note: supported by 386MAX v6.01, which otherwise only supports DPMI 0.9
SeeAlso: AX=0E00h
----------32---------------------------------
INT 32 - VIRUS - reportedly used by "Tiny" Viruses
SeeAlso: INT 60"VIRUS"
----------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.
SeeAlso: AX=0011h,AX=0021h,AX=002Fh,INT 62/AX=007Ah,INT 74
----------330001-----------------------------
INT 33 - MS MOUSE - SHOW MOUSE CURSOR
AX = 0001h
SeeAlso: AX=0002h,INT 16/AX=FFFEh,INT 62/AX=007Bh
----------330002-----------------------------
INT 33 - MS MOUSE - 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
----------330003-----------------------------
INT 33 - MS MOUSE - RETURN POSITION AND BUTTON STATUS
AX = 0003h
Return: BX = button status
bit 0 left button pressed if 1
bit 1 right button pressed if 1
bit 2 middle button pressed if 1 (Mouse Systems/Logitech mouse)
CX = column
DX = row
SeeAlso: AX=0004h,AX=000Bh,INT 2F/AX=D000h"ZWmous"
----------330004-----------------------------
INT 33 - MS MOUSE - 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; however, some versions of the Microsoft documentation
incorrectly state that the coordinates are rounded
SeeAlso: AX=0003h,INT 62/AX=0081h
----------330005-----------------------------
INT 33 - MS MOUSE - RETURN BUTTON PRESS DATA
AX = 0005h
BX = button
0000h left
0001h right
0002h middle (Mouse Systems/Logitech mouse)
Return: AX = button states
bit 0 left button pressed if 1
bit 1 right button pressed if 1
bit 2 middle button pressed if 1 (Mouse Systems/Logitech mouse)
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
SeeAlso: AX=0006h,INT 62/AX=007Ch
----------330006-----------------------------
INT 33 - MS MOUSE - RETURN BUTTON RELEASE DATA
AX = 0006h
BX = button
0000h left
0001h right
0002h middle (Mouse Systems/Logitech mouse)
Return: AX = button states
bit 0 left button pressed if 1
bit 1 right button pressed if 1
bit 2 middle button pressed if 1 (Mouse Systems/Logitech mouse)
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
SeeAlso: AX=0005h,INT 62/AX=007Ch
----------330007-----------------------------
INT 33 - MS MOUSE - DEFINE HORIZONTAL CURSOR RANGE
AX = 0007h
CX = minimum column
DX = maximum column
SeeAlso: AX=0008h,AX=0010h,AX=0031h,INT 62/AX=0080h
----------330008-----------------------------
INT 33 - MS MOUSE - DEFINE VERTICAL CURSOR RANGE
AX = 0008h
CX = minimum row
DX = maximum row
SeeAlso: AX=0007h,AX=0010h,AX=0031h,INT 62/AX=0080h
----------330009-----------------------------
INT 33 - MS MOUSE - 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 -> bitmap
16 words screen mask
16 words cursor mask
each word defines the sixteen pixels of a row, low bit
rightmost
SeeAlso: AX=000Ah,AX=0012h,AX=002Ah,INT 62/AX=007Fh
----------33000A-----------------------------
INT 33 - MS MOUSE - 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 char/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
----------33000B-----------------------------
INT 33 - MS MOUSE - 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
----------33000C-----------------------------
INT 33 - MS MOUSE - DEFINE INTERRUPT SUBROUTINE PARAMETERS
AX = 000Ch
CX = call mask
bit 0 call if mouse moves
bit 1 call if left button pressed
bit 2 call if left button released
bit 3 call if right button pressed
bit 4 call if right button released
bit 5 call if middle button pressed (Mouse Systems/Logitech mouse)
bit 6 call if middle button released (Mouse Sys/Logitech mouse)
ES:DX -> FAR routine
Notes: when the subroutine is called, it is passed the following values:
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
some versions of the Microsoft documentation incorrectly state that CX
bit 0 means call if mouse cursor moves, and swap the meanings of SI
and DI
SeeAlso: AX=0018h
----------33000D-----------------------------
INT 33 - MS MOUSE - LIGHT PEN EMULATION ON
AX = 000Dh
SeeAlso: AX=000Eh,INT 10/AH=04h
----------33000E-----------------------------
INT 33 - MS MOUSE - LIGHT PEN EMULATION OFF
AX = 000Eh
SeeAlso: AX=000Dh
----------33000F-----------------------------
INT 33 - MS MOUSE - 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
----------330010-----------------------------
INT 33 - MS MOUSE - 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
----------330010-----------------------------
INT 33 - Genius MOUSE - DEFINE SCREEN REGION FOR UPDATING
AX = 0010h
ES:DX -> update region list (see below)
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 update region list:
Offset Size Description
00h WORD left-most column
02h WORD top-most row
04h WORD right-most column
06h WORD bottom-most row
----------330011-----------------------------
INT 33 - Genius Mouse 9.06 - GET NUMBER OF BUTTONS
AX = 0011h
Return: AX = FFFFh
BX = number of buttons
SeeAlso: AX=0000h
----------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
----------330013-----------------------------
INT 33 - MS MOUSE - 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
----------330014-----------------------------
INT 33 - MS MOUSE - EXCHANGE INTERRUPT SUBROUTINES
AX = 0014h
CX = call mask (see AX=000Ch)
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
----------330015-----------------------------
INT 33 - MS MOUSE - RETURN DRIVER STORAGE REQUIREMENTS
AX = 0015h
Return: BX = size of buffer needed to store driver state
SeeAlso: AX=0016h,AX=0017h,AX=0042h
----------330016-----------------------------
INT 33 - MS MOUSE - SAVE DRIVER STATE
AX = 0016h
BX = size of buffer (see AX=0015h)
ES:DX -> buffer for driver state
Note: although not documented, many drivers appear to require BX on input
SeeAlso: AX=0015h,AX=0017h
----------330017-----------------------------
INT 33 - MS MOUSE - RESTORE DRIVER STATE
AX = 0017h
BX = size of buffer (see AX=0015h)
ES:DX -> buffer containing saved state
Notes: although not documented, 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
----------330018-----------------------------
INT 33 - MS MOUSE - SET ALTERNATE MOUSE USER HANDLER
AX = 0018h
CX = call mask
bit 0 call if mouse moves
bit 1 call if left button pressed
bit 2 call if left button released
bit 3 call if right button pressed
bit 4 call if right button released
bit 5 call if shift button pressed during event
bit 6 call if ctrl key pressed during event
bit 7 call if alt key pressed during event
ES:DX -> FAR routine
Return: AX = 0018h if successful
= FFFFh on error
Notes: when the subroutine is called, it is passed the following values:
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
up to three handlers can be defined by separate calls to this function
SeeAlso: AX=000Ch,AX=0014h,AX=0019h
----------330019-----------------------------
INT 33 - MS MOUSE - RETURN USER ALTERNATE INTERRUPT VECTOR
AX = 0019h
CX = call mask (see AX=0018h)
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
----------33001A-----------------------------
INT 33 - MS MOUSE - 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
----------33001B-----------------------------
INT 33 - MS MOUSE - RETURN MOUSE SENSITIVITY
AX = 001Bh
Return: BX = horizontal speed
CX = vertical speed
DX = double speed threshold
SeeAlso: AX=000Bh,AX=001Ah
----------33001C-----------------------------
INT 33 - MS MOUSE - SET INTERRUPT RATE
AX = 001Ch
BX = rate
00h no interrupts allowed
01h 30 per second
02h 50 per second
03h 100 per second
04h 200 per second
Notes: only available on InPort mouse
values greater than 4 may cause unpredictable driver behavior
----------33001D-----------------------------
INT 33 - MS MOUSE - DEFINE DISPLAY PAGE NUMBER
AX = 001Dh
BX = display page number
Note: the cursor will be displayed on the specified page
SeeAlso: AX=001Eh
----------33001E-----------------------------
INT 33 - MS MOUSE - RETURN DISPLAY PAGE NUMBER
AX = 001Eh
Return: BX = display page number
SeeAlso: AX=001Dh
----------33001F-----------------------------
INT 33 - MS MOUSE - DISABLE MOUSE DRIVER
AX = 001Fh
Return: AX = 001Fh unsuccessful
FFFFh successful
ES:BX = vector for INT 33h before mouse driver was first installed
Note: restores vectors for Int 10h and Int 71h (8086) or Int 74h (286/386)
if you restore Int 33h to ES:BX, driver will be completely disabled
SeeAlso: AX=0020h
----------330020-----------------------------
INT 33 - MS MOUSE - ENABLE MOUSE DRIVER
AX = 0020h
Return: AX = 0020h unsuccessful (or driver not installed)
FFFFh successful
Note: restores vectors for Int 10h and Int 71h (8086) or Int 74h (286/386)
which were removed by function 1Fh
SeeAlso: AX=001Fh
----------330021-----------------------------
INT 33 - MS MOUSE - SOFTWARE RESET
AX = 0021h
Return: AX = FFFFh if mouse driver installed
BX = number of buttons (FFFFh = two buttons)
0021h if mouse driver not installed
Note: identical to funtion 00h, but does not reset the mouse
SeeAlso: AX=0000h
----------330022-----------------------------
INT 33 - MS MOUSE - SET LANGUAGE FOR MESSAGES
AX = 0022h
BX = language
00h English
01h French
02h Dutch
03h German
04h Swedish
05h Finnish
06h Spanish
07h Portugese
08h Italian
Note: only available on international versions of the driver, US versions
ignore this call
SeeAlso: AX=0023h
----------330023-----------------------------
INT 33 - MS MOUSE - GET LANGUAGE FOR MESSAGES
AX = 0023h
Return: BX = language (see AX=0022h)
Note: the US version of the driver always returns zero
SeeAlso: AX=0022h
----------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)
SeeAlso: AX=004Dh,AX=006Dh
----------330025-----------------------------
INT 33 - MS MOUSE v6.26+ - GET GENERAL DRIVER INFORMATION
AX = 0025h
Return: AX = general information
bit 15: driver loaded as device driver rather than TSR
bit 14: driver is newer integrated type
bits 13,12: current cursor type
00 software text cursor
01 hardware text cursor
1X graphics cursor
bits 11-8: interrupt rate (see AX=001Ch)
bits 7-0: count of currently-active Mouse Display Drivers (MDD),
the newer integrated driver type
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)
----------330026-----------------------------
INT 33 - MS MOUSE v6.26+ - GET MAXIMUM VIRTUAL COORDINATES
AX = 0026h
Return: BX = mouse-disabled flag
CX = maximum virtual X (for current video mode)
DX = maximum virtual Y
SeeAlso: AX=0031h
----------330026-----------------------------
INT 33 - Genius Mouse 9.06 - ???
AX = 0026h
Return: CX = 0204h if CX was 0105h on entry, else unchanged
----------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
----------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)
Note: DX is ignored unless the selected video mode supports font size control
SeeAlso: AX=0029h,INT 10/AH=00h
----------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)
BS: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
----------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 (00h none, 01h bus, 02h serial, 03h InPort, 04h IBM,
05h Hewlett-Packard)
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
----------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 below)
Return: AX = success flag
SeeAlso: AX=002Ch,AX=002Dh,AX=0033h
Format of acceleration profile data:
Offset Size Description
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
----------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 AX=002Bh)
SeeAlso: AX=002Bh,AX=002Dh,AX=0033h
----------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
----------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 for profile names (16 bytes per name)
Return: AX = status (0000h success)
ES:SI buffer filled with default names if BL nonzero on entry
Note: not supported by Logitech driver v6.10
SeeAlso: AX=002Ch,AX=002Dh,AX=012Eh,AX=022Eh
----------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
----------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)
bit 5: button 1
bit 4: button 2
bit 3: button 3
bit 2: button 4
other: zero
BX = rotation angle (0-360 degrees)
CH = primary button mask
CL = secondary button mask
----------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
----------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
----------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
Return: AX = 0000h
CX = number of bytes returned
ES:DX buffer filled (see below)
SeeAlso: AX=002Bh
Format of data buffer:
Offset Size Description
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 AX=002Bh)
154h 5 BYTEs ??? (Microsoft driver, but not Logitech)
----------330034-----------------------------
INT 33 - MS MOUSE v8.0+ - GET INITIALIZATION FILE
AX = 0034h
Return: AX = status (0000h successful)
ES:DX -> ASCIZ initialization (.INI) file name
----------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 below)
BL = size (see below)
CH = threshold
CL = active flag (00h disabled, 01h enabled)
DX = delay
other
BH = style (00h normal, 01h reverse, 02h transparent)
BL = size (00h small "1", 01h medium "1.5", 02h large "2")
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
----------330042-----------------------------
INT 33 - PCMOUSE - GET MSMOUSE STORAGE REQUIREMENTS
AX = 0042h
Return: AX = FFFFh successful
BX = buffer size in bytes for functions 50h and 52h
= 0000h MSMOUSE not installed
= 0042h functions 42h, 50h, and 52h not supported
Note: this function is also supported by the Genius Mouse 9.06 driver
SeeAlso: AX=0015h,AX=0050h,AX=0052h
----------330043-----------------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01 - CONFIGURE MOUSE???
AX = 0043h
CX:BX -> ??? buffer (see below)
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 buffer:
Offset Size Description
00h WORD I/O port address
02h BYTE ???
03h BYTE interrupt number
04h BYTE interrupt mask for interrupt controller
05h 5 BYTEs ???
----------330044CXCDEF-----------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01 - TOGGLE ???
AX = 0044h
CX = CDEFh
Return: AX = new state of ???
Note: this function is also supported by the Genius Mouse 9.06 driver
SeeAlso: AX=0045h
----------330045CXCDEF-----------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01 - TOGGLE ???
AX = 0045h
CX = CDEFh
Return: AX = new state of ???
Note: this function is also supported by the Genius Mouse 9.06 driver
SeeAlso: AX=0044h
----------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
----------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
----------33004B-----------------------------
INT 33 - Z-NIX MOUSE DRIVER v7.04d - INSTALLATION CHECK
AX = 004Bh
Return: ES:DI -> signature/description string if installed
Note: the signature string in v7.04d is
"Z-NIX;BUS,AUX,Serial 3-byte and 5-byte Mouse Driver;ZMOUSE;v7.04d"
----------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
----------33004D-----------------------------
INT 33 - MS MOUSE - RETURN POINTER TO COPYRIGHT STRING
AX = 004Dh
Return: ES:DI -> copyright message "*** This is Copyright 1983 Microsoft"
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
----------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
----------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
----------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
----------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
----------330054CXCDEF-----------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01 - SELECT ULTRARES ACCELERATION LEVEL
AX = 0054h
CX = CDEFh
BX = ??? (NOP if <= 0000h)
Return: ???
Note: this function is also supported by the Genius Mouse 9.06 driver
SeeAlso: AX=005Ah
----------330055-----------------------------
INT 33 - Kraft Mouse - GET ???
AX = 0055h
Return: CX = ???
DX = ???
ES = ???
----------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
----------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
----------330061BXCDEF-----------------------
INT 33 - Mouse Systems MOUSE DRIVER v7.01 - ???
AX = 0061h
BX = CDEFh
Return: CX = ???
Note: also supported by Genius Mouse 9.06
----------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
----------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
----------33006D-----------------------------
INT 33 - MS MOUSE - GET VERSION STRING
AX = 006Dh
Return: ES:DI -> Microsoft version number of resident driver (see below)
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)
SeeAlso: AX=0024h,AX=004Dh,AX=266Ch
Format of Microsoft version number:
Offset Size Description
00h BYTE major version
01h BYTE minor version (BCD)
----------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 below)
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 data structure:
Offset Size Description
00h WORD signature ABCDh
02h DWORD pointer to info structure???
06h 2 BYTEs ???
08h WORD signature ABCDh
Format of info structure:
Offset Size Description
00h WORD driver version
02h 8 BYTEs ???
0Ah WORD segment of ???
???
----------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
----------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
----------33012E-----------------------------
INT 33 - MS MOUSE v8.10+ - ???
AX = 012Eh
BL = ???
Return: AX = 0000h
Note: not supported by Logitech driver v6.10
SeeAlso: AX=002Eh,AX=022Eh
----------33022E-----------------------------
INT 33 - MS MOUSE v8.10+ - ???
AX = 022Eh
BL = ???
Return: AX = 0000h
Note: not supported by Logitech driver v6.10
SeeAlso: AX=002Eh,AX=012Eh
----------33136C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - ???
AX = 136Ch
BX = ???
Return: AX = ???
BX = ???
----------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: ???
----------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
----------33166C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - ???
AX = 166Ch
BL = ???
00h ???
01h ???
other ???
BH = new value of ???
Return: AX = FFFFh
----------33176C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - ???
AX = 176Ch
???
Return: ???
----------33186C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - ???
AX = 186Ch
???
Return: ???
----------33196C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - ???
AX = 196Ch
???
Return: ???
----------331A6C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - GET ???
AX = 1A6Ch
Return: AX = FFFFh
BX = ???
CX = ???
SeeAlso: AX=1B6Ch
----------331B6C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - SET ???
AX = 1B6Ch
BX = new value for ??? (0000h-0003h)
Return: AX = FFFFh
SeeAlso: AX=1A6Ch
----------331C6C-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - ???
AX = 1C6Ch
BX = ???
<42h ???
=42h ???
>42h ???
ES:DI -> ???
Return: AX = ???
----------331D6C-----------------------------
INT 33 - LOGITECH MOUSE - GET COMPASS PARAMETER
AX = 1D6Ch
Return: BX = direction (0=north, 1=south, 2=east, 3=west)
SeeAlso: AX=1E6Ch
----------331E6C-----------------------------
INT 33 - LOGITECH MOUSE - SET COMPASS PARAMETER
AX = 1E6Ch
BX = direction (0=north, 1=south, 2=east, 3=west)
SeeAlso: AX=1D6Ch
----------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
----------33206C-----------------------------
INT 33 - LOGITECH MOUSE - SET LEFT OR RIGHT PARAMETER
AX = 206Ch
BX = parameter (00h = right, FFh = left)
SeeAlso: AX=216Ch
----------33216C-----------------------------
INT 33 - LOGITECH MOUSE - GET LEFT OR RIGHT PARAMETER
AX = 216Ch
Return: BX = parameter (00h = right, FFh = left)
SeeAlso: AX=206Ch
----------33226C-----------------------------
INT 33 - LOGITECH MOUSE - REMOVE DRIVER FROM MEMORY
AX = 226Ch
Note: this only frees memory; does not restore hooked interrupts
----------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
----------33246C-----------------------------
INT 33 - LOGITECH MOUSE - GET PARAMETERS AND RESET SERIAL MOUSE
AX = 246Ch
ES:DX -> parameter table buffer (see below)
Return: AX = FFFFh if driver installed for serial mouse
SeeAlso: AX=0000h,AX=256Ch
Format of parameter table:
Offset Size Description
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 0 (serial mouse only)
0Ah WORD port (serial mouse only)
0Ch WORD physical buttons
0Eh WORD logical buttons
----------33256CBX00h -----------------------
INT 33 - LOGITECH MOUSE - SET PARAMETERS
AX = 256Ch
BX = 00h set baud rate (serial mouse only)
CX = rate (0=1200, 1=2400, 2=4800, 3=9600)
= 01h set emulation (serial mouse only)
CX = emulation
0 = 5 byte packed binary
1 = 3 byte packed binary
2 = hexadecimal
3 = relative bit pad
4 = not supported
5 = MM Series
6 = not supported
7 = Microsoft
= 02h set report rate (serial mouse only)
CX = rate (0=10, 1=20, 2=35, 3=50, 4=70, 5=100, 6=150)
= 03h set port (serial mouse only)
CX = port (1, 2)
= 04h set mouse logical buttons
CX = buttons (2, 3)
Return: AX = FFFFh if driver installed for serial mouse
SeeAlso: AX=246Ch,AX=276Ch
----------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
----------33276C-----------------------------
INT 33 - LOGITECH MOUSE - ??? Tries MMSeries, Baud 2400
AX = 276Ch
SeeAlso: AX=256Ch
----------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
----------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
----------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
----------333003-----------------------------
INT 33 - Smooth Mouse Driver, PrecisePoint - GET INFORMATION
AX = 3003h
BL = data structure selector
00h Primary Bitmap (used for 25 line mode)
01h Secondary Bitmap (used for 43/50 line modes)
02h Sacrifice Character Map
03h Program Information
Return: ES:DI -> selected data structure
SeeAlso: AX=3000h
Format of Primary/Secondary Bitmap [SMD_BITMAP_STRUCT]
Offset Size Description
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
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
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
----------33---------------------------------
INT 33 - Smooth Mouse Driver, PrecisePoint - RESERVED FUTURE EXPANSION
AX = 3004
SeeAlso: AX=3000h
----------33---------------------------------
INT 33 - Smooth Mouse Driver, PrecisePoint - RESERVED FUTURE EXPANSION
AX = 3005
SeeAlso: AX=3000h
----------334F00-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - GET ???
AX = 4F00h
Return: AX = 004Fh if supported
BX = ???
ES:DI -> ???
SeeAlso: AX=4F01h
----------334F01-----------------------------
INT 33 - LOGITECH MOUSE v6.10+ - ???
AX = 4F01h
ES = ???
Return: AX = 004Fh if supported
ES:DI -> ???
SeeAlso: AX=4F00h
----------34---------------------------------
INT 34 - FLOATING POINT EMULATION - OPCODE D8h
Note: the floating-point emulators in Borland and Microsoft languages and
Lahey FORTRAN use this interrupt
SeeAlso: INT 35,INT 3E
----------35---------------------------------
INT 35 - FLOATING POINT EMULATION - OPCODE D9h
Note: the floating-point emulators in Borland and Microsoft languages and
Lahey FORTRAN use this interrupt
SeeAlso: INT 34,INT 36
----------36---------------------------------
INT 36 - FLOATING POINT EMULATION - OPCODE DAh
Note: the floating-point emulators in Borland and Microsoft languages and
Lahey FORTRAN use this interrupt
SeeAlso: INT 35,INT 37
----------37---------------------------------
INT 37 - FLOATING POINT EMULATION - OPCODE DBh
Note: the floating-point emulators in Borland and Microsoft languages and
Lahey FORTRAN use this interrupt
SeeAlso: INT 36,INT 38
----------38---------------------------------
INT 38 - FLOATING POINT EMULATION - OPCODE DCh
Note: the floating-point emulators in Borland and Microsoft languages and
Lahey FORTRAN use this interrupt
SeeAlso: INT 37,INT 39
----------3802-------------------------------
INT 38 - PC-MOS/386 v3.0 - GET MOS INTERNAL DATA POINTER
AH = 02h
Return: AX = 0000h
ES:BX -> ??? internal data structure
Program: PC-MOS/386 is a multitasking/multiuser MSDOS-compatible operating
system by Software Links, Inc.
SeeAlso: AH=04h,AH=10h,INT 21/AX=3000h
----------3804-------------------------------
INT 38 - PC-MOS/386 v3.0 - GET TASK CONTROL BLOCK
AH = 04h
Return: ES = segment of Task Control Block (TCB) (see below)
SeeAlso: AH=02h
Format of Task Control Block:
Offset Size Description
00h 2 BYTEs signature "HT"
02h 23 BYTEs ???
19h BYTE task time slice
1Ah 7 BYTEs ???
21h 11 BYTEs name of currently executing task
2Ch 79 BYTEs ???
7Bh 4 BYTEs user name
7Fh BYTE current output class
80h 7 BYTEs protection access rights, 2 bits per class (writeable!)
???
----------380703-----------------------------
INT 38 - PC-MOS/386 v3.0 - WAIT FOR KEYPRESS OR TIMEOUT
AX = 0703h
CX = timeout (in seconds???)
Return: AH bit 0 set if key pressed, clear otherwise
SeeAlso: INT 16/AH=00h
----------3810-------------------------------
INT 38 - PC-MOS/386 v3.0 - ENTER NATIVE 386 EXECUTION MODE
AH = 10h
CX = NCA (???) length in bytes (at least 1024???)
DX = NCA segment
Return: in protected mode
all segment registers converted to appropriate selectors
Note: MSDOS calls are available in protected mode
SeeAlso: AH=11h,AH=12h,INT 2F/AX=1687h,INT 67/AX=DE0Ch
----------3811-------------------------------
INT 38 - PC-MOS/386 v3.0 - ALLOCATE NATIVE MODE MEMORY BLOCK
AH = 11h
EBX = block length
Return: ES = selector for allocated block
SeeAlso: AH=10h,AH=12h
----------3812-------------------------------
INT 38 - PC-MOS/386 v3.0 - FREE NATIVE MODE MEMORY BLOCK
AH = 12h
ES = selector for block to free
SeeAlso: AH=10h,AH=11h
----------39---------------------------------
INT 39 - FLOATING POINT EMULATION - OPCODE DDh
Note: the floating-point emulators in Borland and Microsoft languages and
Lahey FORTRAN use this interrupt
SeeAlso: INT 38,INT 3A
----------3A---------------------------------
INT 3A - FLOATING POINT EMULATION - OPCODE DEh
Note: the floating-point emulators in Borland and Microsoft languages and
Lahey FORTRAN use this interrupt
SeeAlso: INT 39,INT 3B
----------3B---------------------------------
INT 3B - FLOATING POINT EMULATION - OPCODE DFh
Note: the floating-point emulators in Borland and Microsoft languages and
Lahey FORTRAN use this interrupt
SeeAlso: INT 3A,INT 3C
----------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
----------3D---------------------------------
INT 3D - FLOATING POINT EMULATION - STANDALONE FWAIT
Notes: the floating-point emulators in Borland and Microsoft languages 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
----------3E---------------------------------
INT 3E - FLOATING POINT EMULATION - Borland LANGUAGES "SHORTCUT" CALL
Notes: the two bytes following the INT 3E instruction are the subcode 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
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
----------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"
----------3F---------------------------------
INT 3F - Microsoft Dynamic Link Library manager
SeeAlso: INT 21/AH=4Bh
----------40---------------------------------
INT 40 - DISKETTE - ROM BIOS DISKETTE HANDLER RELOCATED BY HARD DISK BIOS
SeeAlso: INT 13,INT 63
----------40---------------------------------
INT 40 - Z100 - Master 8259 - Parity error or S100 error
SeeAlso: INT 41"Z100",INT FF"Z100"
----------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"
----------41---------------------------------
INT 41 - SYSTEM DATA - HARD DISK 0 PARAMETER TABLE
Note: 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
SeeAlso: INT 13/AH=09h,INT 1E,INT 46
Format of fixed disk parameters:
Offset Size Description
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
bits 0-2: drive option (XT only, 0 for others)
bit 3: set if more than 8 heads (AT and later only)
bit 4: always 0
bit 5: set if manufacturer's defect map on max cylinder+1
(AT and later only)
bit 6: disable ECC retries
bit 7: disable access retries
09h BYTE standard timeout (XT only, 0 for others)
0Ah BYTE formatting timeout (XT only, 0 for others)
0Bh BYTE timeout for checking drive (XT 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
----------41---------------------------------
INT 41 - Z100 - Master 8259 - Processor Swap
SeeAlso: INT 40"Z100",INT 42"Z100"
----------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 below)
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 control block:
Offset Size Description
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
----------4112-------------------------------
INT 41 P - MS Windows debugging kernel - "OutputDebugString"
AH = 12h
???
Return: ???
SeeAlso: AH=50h
----------4150-------------------------------
INT 41 P - MS Windows debugging kernel - "DefineDebugSegment"
AH = 50h
???
Return: ???
SeeAlso: AH=12h
----------42---------------------------------
INT 42 - VIDEO - RELOCATED DEFAULT INT 10 VIDEO SERVICES (EGA,VGA)
SeeAlso: INT 10
Note: not used by PS/2 built-in VGA or XGA
----------42---------------------------------
INT 42 - Z100 - Master 8259 - Timer
SeeAlso: INT 41"Z100",INT 43"Z100"
----------42---------------------------------
INT 42 - Acorn BBS 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"
----------43---------------------------------
INT 43 - VIDEO DATA - CHARACTER TABLE (EGA,MCGA,VGA)
points at graphics data for characters 00h-7Fh of the current font
SeeAlso: INT 1F,INT 44"VIDEO"
----------43---------------------------------
INT 43 - Z100 - Master 8259 - Slave 8259 input
Note: slave runs in special fully nested mode
SeeAlso: INT 42"Z100",INT 44"Z100"
----------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"
----------44---------------------------------
INT 44 - VIDEO DATA - ROM BIOS CHARACTER FONT, CHARACTERS 00h-7Fh (PCjr)
points at graphics data for current character font
SeeAlso: INT 1F,INT 43"VIDEO"
----------44---------------------------------
INT 44 - Novell NetWare - HIGH-LEVEL LANGUAGE API
----------44---------------------------------
INT 44 - IBM 3270-PC High Level Language API
DS:SI -> parameter control block
----------44---------------------------------
INT 44 - Z100 - Master 8259 - Serial A
SeeAlso: INT 43"Z100",INT 45"Z100"
----------44---------------------------------
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 below)
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
AH = 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
Note: the commandline tail is terminated with a carriage return (0Dh)
SeeAlso: INT 40"Acorn",INT 41"Acorn",INT 45"Acorn",INT 4A"Acorn"
Values for filing system:
00h none
01h 1200 bps cassette
02h 300 bps cassette
03h ROM FS
04h DFS
05h ANFS/NFS
06h TFS
08h ADFS
----------45---------------------------------
INT 45 - Z100 - Master 8259 - Serial B
SeeAlso: INT 44"Z100",INT 46"Z100"
---------------------------------------------
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 below)
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 control block:
Offset Size Description
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:
bit 0: no owner read access
bit 1: no owner write access
bit 2: not executable by owner
bit 3: not deletable by owner
bit 4: no public read access
bit 5: no public write access
bit 6: not executable with public access
bit 7: not deletable with public access
other three bytes are filing-system specific file attributes
----------46---------------------------------
INT 46 - SYSTEM DATA - HARD DISK 1 DRIVE PARAMETER TABLE
SeeAlso: INT 13/AH=09h,INT 41
----------46---------------------------------
INT 46 - Z100 - Master 8259 - Keyboard, Retrace, and Light Pen
SeeAlso: INT 45"Z100",INT 47"Z100"
----------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"
----------47---------------------------------
INT 47 - Z100 - Master 8259 - Printer
SeeAlso: INT 46"Z100",INT 48"Z100"
----------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"
----------478000-----------------------------
INT 47 - SQL Base - DATABASE ENGINE API
AX = 8000h
DS:BX -> parameter block, first word is function number
Note: SQL Base is a network-oriented database engine by Gupta Technologies
Values for 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: ???
Note: SQL Base is a network-oriented database engine by Gupta Technologies
----------48---------------------------------
INT 48 - KEYBOARD - CORDLESS KEYBOARD TRANSLATION (PCjr)
SeeAlso: INT 49"PCjr"
----------48---------------------------------
INT 48 - Z100 - Slave 8259 - S100 vectored line 0
SeeAlso: INT 47"Z100",INT 49"Z100"
----------48---------------------------------
INT 48 - Watstar PC Network data pointer 1
SeeAlso: INT 49"Watstar"
----------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"
----------49---------------------------------
INT 49 - SYSTEM DATA - NON-KEYBOARD SCAN-CODE TRANSLATION TABLE (PCjr)
SeeAlso: INT 48"PCjr"
Format of translation table:
Offset Size Description
00h BYTE number of nonkeyboard 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
----------49---------------------------------
INT 49 - Z100 - Slave 8259 - S100 vectored line 1
SeeAlso: INT 48"Z100",INT 4A"Z100"
----------49---------------------------------
INT 49 - Texas Instruments PC - VIDEO I/O???
apparently provides direct video display on the TI Professional PC
----------49---------------------------------
INT 49 - Watstar PC Network data pointer 2
SeeAlso: INT 49"Watstar"
----------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"
----------490001-----------------------------
INT 49 - MAGic v1.16+ - TURN ON MAGNIFICATION
AX = 0001h
Return: AX = 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
BX,CX,DX destroyed
Notes: MAGic (MAGnification In Color) is a TSR by Microsystems Software, Inc.
providing 2x2 text and graphics magnification on VGA, XGA, and SVGA
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=0001h,AX=0003h,AX=0004h,AX=0008h
----------490002-----------------------------
INT 49 - MAGic v1.16+ - TURN OFF MAGNIFICATION
AX = 0002h
Return: AX = status (see AX=0001h)
BX,CX,DX destroyed
SeeAlso: AX=0001h
----------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
----------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
----------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
----------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
----------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
----------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
----------4A---------------------------------
INT 4A - SYSTEM - USER ALARM HANDLER
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;
however, 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
----------4A---------------------------------
INT 4A - Z100 - Slave 8259 - S100 vectored line 2
SeeAlso: INT 49"Z100",INT 4B"Z100"
----------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 below)
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 control block for function FAh:
Offset Size Description
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)
bit 7: unused
bit 6: always use main screen memory if I/O addr 3000h-7FFFh
(overrides bit 5)
bit 5: use shadow screen memory if screen address specified
bit 4: use current ROM rather than ROM selected by bits 3-0
(only if I/O address between 8000h and BFFFh)
bits 3-0: paged ROM number
----------4B---------------------------------
INT 4B - Z100 - Slave 8259 - S100 vectored line 3
SeeAlso: INT 4A"Z100",INT 4C"Z100"
----------4B---------------------------------
INT 4B - Common Access Method SCSI interface (draft revision 1.9)
ES:DI -> CAM Control Block (see INT 4F/AX=8100h)
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 installation check for the driver is the string "SCSI_CAM" eight
bytes past the INT 4Bh handler
it is not known whether any drivers actually implemented this
interface on INT 4B instead of INT 4F
SeeAlso: INT 4F/AX=8100h
----------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"
----------4B80-------------------------------
INT 4B - IBM SCSI interface
AH = 80h
details not yet available
----------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
0000h for Quadtel's QMAPS and Hewlett-Packard's HPMM.SYS
0001h for Microsoft's EMM386.EXE
4560h ("E`") for Qualitas' 386MAX
4D43h ("MC") for V Communication's Memory Commander
5145h ("QE") for Quarterdeck's QEMM-386
CX = product revision number
always 0000h for QMAPS and HPMM.SYS
always 0001h for Microsoft's EMM386.EXE v4.20-4.41
SI:DI = maximum DMA buffer size
DX = flags
bit 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)
CF set on error
AL = error code (see below)
Note: bit 5 of 0040h:007Bh is supposed to be set if VDS is supported; this is
apparently not always the case
SeeAlso: INT 31
Values for 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
Format of DMA descriptor structure (DDS):
Offset Size Description
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
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
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
----------4B8103-----------------------------
INT 4B - Virtual DMA Specification - LOCK DMA REGION
AX = 8103h
DX = flags
bit 0: reserved (zero)
1: data should be copied into buffer (ignored if bit 2 set)
2: buffer should not be allocated if region noncontiguous or
crosses physical alignment boundary specified by bits 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)
ES:DI -> DMA descriptor structure (see AX=8102h)
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 AX=8102h)
DDS region size field filled wth maximum contiguous length in bytes
SeeAlso: AX=8104h,AX=8105h
----------4B8104-----------------------------
INT 4B - Virtual DMA Specification - UNLOCK DMA REGION
AX = 8104h
DX = flags
bit 0: reserved (zero)
1: data should be copied out of buffer
2-15: reserved (zero)
ES:DI -> DMA descriptor structure (see AX=8102h) 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 AX=8102h)
DDS region size field filled wth maximum contiguous length in bytes
SeeAlso: AX=8103h,AX=8106h
----------4B8105-----------------------------
INT 4B - Virtual DMA Specification - SCATTER/GATHER LOCK REGION
AX = 8105h
DX = flags
bits 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)
ES:DI -> Extended DMA descriptor structure (see AX=8102h)
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 AX=8102h)
EDDS region size field filled with max length in bytes that can be
locked and described in the EDDS table
SeeAlso: AX=8103h,AX=8106h
----------4B8106-----------------------------
INT 4B - Virtual DMA Specification - SCATTER/GATHER UNLOCK REGION
AX = 8106h
DX = flags
bits 0-5: reserved (zero)
6: EDDS contains page table entries
7: EDDS may contain not-present pages (entry = 0000h)
8-15: reserved (zero)
ES:DI -> Extended DMA descriptor structure (see AX=8102h) returned
by AX=8105h
Return: CF clear if successful
CF set on error
AL = error code (see AX=8102h)
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
----------4B8107-----------------------------
INT 4B - Virtual DMA Specification - REQUEST DMA BUFFER
AX = 8107h
DX = flags
bit 0: reserved (zero)
1: data should be copied into buffer
2-15: reserved (zero)
ES:DI -> DMA descriptor structure (see AX=8102h) 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 AX=8102h)
SeeAlso: AX=8108h
----------4B8108-----------------------------
INT 4B - Virtual DMA Specification - RELEASE DMA BUFFFER
AX = 8108h
DX = flags
bit 0: reserved (zero)
1: data should be copied out of buffer
2-15: reserved (zero)
ES:DI -> DMA descriptor structure (see AX=8102h) 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 AX=8102h)
SeeAlso: AX=8107h
----------4B8109DX0000-----------------------
INT 4B - Virtual DMA Specification - COPY INTO DMA BUFFER
AX = 8109h
DX = 0000h
ES:DI -> DMA descriptor structure (see AX=8102h) 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 AX=8102h)
SeeAlso: AX=810Ah
----------4B810ADX0000-----------------------
INT 4B - Virtual DMA Specification - COPY OUT OF DMA BUFFER
AX = 810Ah
DX = 0000h
ES:DI -> DMA descriptor structure (see AX=8102h) 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 AX=8102h)
SeeAlso: AX=8109h
----------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 AX=8102h)
SeeAlso: AX=810Ch
----------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 AX=8102h)
SeeAlso: AX=810Bh
----------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
----------4C---------------------------------
INT 4C - Z100 - Slave 8259 - S100 vectored line 4
SeeAlso: INT 4B"Z100",INT 4D"Z100"
----------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"
----------4D---------------------------------
INT 4D - Z100 - Slave 8259 - S100 vectored line 5
SeeAlso: INT 4C"Z100",INT 4E"Z100"
----------4E---------------------------------
INT 4E - TI Professional PC - DISK I/O
used instead of INT 13 on the TI Professional PC
SeeAlso: INT 13
----------4E---------------------------------
INT 4E - Z100 - Slave 8259 - S100 vectored line 6
SeeAlso: INT 4D"Z100",INT 4F"Z100"
----------4F---------------------------------
INT 4F - Z100 - Slave 8259 - S100 vectored line 7
SeeAlso: INT 4E"Z100"
----------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 below)
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 4B"Common Access Method"
Format of CAM Control Block:
Offset Size Description
00h DWORD physical address of this CCB
04h WORD CAM control block length
06h BYTE function code (see below)
07h BYTE CAM status (see below)
08h BYTE SCSI status
09h BYTE path ID (FFh = XPT)
0Ah BYTE target ID
0Bh BYTE logical unit number
0Ch BYTE CAM flags
bits 7-6: direction
00 reserved
01 in
10 out
11 no data transfer
bit 5: disable autosense
4: scatter/gather
3: disable callback on completion
2: linked CDB
1: tagged queue action enable
0: CDB is a pointer
0Dh BYTE CAM flags
bit 7: disable disconnect
6: initiate synchronous transfers \ mutually
5: disable synchronous transfers / exclusive
4: SIM queue priority
1 head insertion
0 tail insertion (normal)
bit 3: SIM queue freeze
2: engine synchronize
bits 1-0: reserved
0Eh BYTE CAM address flags
bit 7: SG list/data (0 = host, 1 = engine)
bit 6: CDB pointer (bits 6-1: 0=virtual addr, 1=phys addr)
bit 5: SG list/data
bit 4: sense buffer
bit 3: message buffer
bit 2: next CCB
bit 1: callback on completion
bit 0: reserved
0Fh BYTE target-mode flags
bit 7: data buffer valid
bit 6: status valid
bit 5: message buffer valid
bit 4: reserved
bit 3: phase-cognizant mode
bit 2: target CCB available
bit 1: disable autodisconnect
bit 0: disable autosave/restore
---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
bit 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
12h BYTE target mode support
bit 7: processor mode
6: phase-cognizant mode
5-0: reserved
13h BYTE miscellaneous flags
bit 7: scanned high to low instead of low to high
6: removables not included in scan
5: inquiry data not kept by XPT
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
bits 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
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 (see function 03h above)
14h DWORD pointer to asynchronous callback routine
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
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
30h 4 BYTEs reserved
34h BYTE SCSI status
35h 3 BYTEs reserved
38h DWORD residual length
40h 12 BYTEs Command Descriptor Block (CDB)
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
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
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
Completion callback function called with:
interrupts disabled
ES:BX -> completed CCB
Asynchronous callback function 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
----------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"
---------------------------------------------
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