AOH :: INT-F.TXT
PC Interrupt Listing Part 6 of 8
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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 fr 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 fr 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-7