Index for category I - IBM workstation/terminal emulators

Table of Contents by Order
0C - INT 0C - IBM SYSTEM 36/38 WORKSTATION EMULATION - API POINTER
214402 - INT 21 U - IBM SYSTEM 36/38 WORKSTATION EMULATION - VDI.SYS - GET ???
21A0 - INT 21 - Attachmate Extra! - GET 3270 DISPLAY STATE
21A1 - INT 21 - Attachmate Extra! - SET 3270 DISPLAY STATE
21A2 - INT 21 - Attachmate Extra! - SET HOST WINDOW STATE
21A3 - INT 21 - Attachmate Extra! - SEND KEYSTROKES TO HOST WINDOW
21A4 - INT 21 - Attachmate Extra! - GET HOST WINDOW BUFFER ADDRESS
21A5 - INT 21 - Attachmate Extra! - GET HOST WINDOW CURSOR POSITION
21AF - INT 21 - Attachmate Extra! - GET TRANSLATE TABLE ADDRESS
21B8 - INT 21 - Attachmate Extra! - DISABLE HOST BUFFER UPDATES
2A90 - INT 2A U - IBM PC 3270 EMULATION PROGRAM - ???
2FB400 - INT 2F - IBM PC3270 EMULATION PROG v3 - INSTALLATION CHECK
2FB401 - INT 2F - IBM PC3270 EMULATION PROG v3 - GET HOST BUFFER ADDRESS
2FB402 - INT 2F - IBM PC3270 EMULATION PROG v3 - ???
2FB403 - INT 2F - IBM PC3270 EMULATION PROG v3 - ???
2FB404 - INT 2F - IBM PC3270 EMULATION PROG v3 - ???
2FB405 - INT 2F - IBM PC3270 EMULATION PROG v3 - ???
44 - INT 44 - IBM 3270-PC High Level Language API
60 - INT 60 u - 3270-PC CONTROL PROGRAM - ???
61 - INT 61 - Sangoma CCIP (CCPOP 3270 resident module) INTERFACE
610002 - INT 61 - Banyan VINES - 3270 INTERFACE
67 - INT 67 - Sangoma CCPOP 3270 resident module
68 - INT 68 - Sangoma CCPOP 3270 resident module
7A04 - INT 7A - IBM 3270 Workstation Program API - CREATE A QUEUE
7A06 - INT 7A - IBM 3270 Workstation Program API - DELETE A QUEUE
7A09--BX8020 - INT 7A - IBM 3270 Workstation Program API - SESSION SERVICES
7A09--BX8020 - INT 7A - IBM 3270 Workstation Program API - KEYBOARD SERVICES
7A09--BX8020 - INT 7A - IBM 3270 Workstation Program API - WINDOW SERVICES
7A09--BX8020 - INT 7A - IBM 3270 Workstation Program API - PRESENTATION SPACE SERVICES
7A09--BX8020 - INT 7A - IBM 3270 Workstation Program API - 3270 EMULATION
7A09--BX8020 - INT 7A - IBM 3270 Workstation Program API - OPERATOR INFORMATION AREA
7A09--BX8020 - INT 7A - IBM 3270 Workstation Program API - TRANSLATE DATA
7A09--BX8020 - INT 7A - IBM 3270 Workstation Program API - COPY SERVICE
7A09--BX8020 - INT 7A - IBM 3270 Workstation Program API - Multi-DOS
7A09 - INT 7A - IBM 3270 Workstation Program API - HOST SERVICES
7A13 - INT 7A - IBM 3270 Workstation Program API - GET DATA FROM A QUEUE
7A81 - INT 7A - IBM 3270 Workstation Program API - RESOLVE A GATE NAME
7A83 - INT 7A - IBM 3270 Workstation Program API - GET COMPLETION RESULTS
7AFDCB - INT 7A - IBM Personal Communications/3270 - INSTALLATION CHECK
7AFE01 - INT 7A - IBM PC3270 EMUL PROG v3 - INTERNAL SEND/RECEIVE FUNCTION
7AFE02 - INT 7A - IBM PC3270 EMUL PROG v3 - INTERNAL SEND/RECEIVE FUNCTION
7AFF01 - INT 7A - IBM PC3270 EMUL PROG v3 - INTERNAL API INITIALIZATION
7AFF02 - INT 7A - IBM PC3270 EMUL PROG v3 - INTERNAL API TERMINATION
7AFF03 - INT 7A - IBM PC3270 EMUL PROG v3 - INTERNAL API INITIALIZATION
7AFF04 - INT 7A U - IBM PC3270 EMUL PROG v3 - INTERNAL ???
7B - INT 7B - Eicon Access API (3270/5250 gateways)
7F0104BX0000 - INT 7F - HLLAPI (IBM 3270 High-Level Language API)/LLAPI (Rabbit Low Level API)

INT 0C - IBM SYSTEM 36/38 WORKSTATION EMULATION - API POINTER
Desc:	the IBM System 36/38 emulator may be invoked through a private API,
	  whose entry point address (see #00007) is offset 100h in the segment
	  pointed at by this vector

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

Format of System 36/38 emulator's data area:
Offset	Size	Description	(Table 00008)
13Eh	BYTE	bit flags for status line indicators turned on since this byte
		last zerod
13Fh	BYTE	bit flags for status line indicators turned off since this
		byte last set to FFh
140h	WORD	offset of EBCDIC to ASCII translation
146h	WORD	offset of EBCDIC screen buffer
148h	WORD	offset of EC (engineering change) level signature
150h	BYTE	"KEYI"
151h	BYTE	5250 key scan code to be sent to remote
15Bh	BYTE	"SYSAV"
15Dh	BYTE	5250 cursor column
15Eh	BYTE	5250 cursor row
167h	BYTE	"DVCTAD"
178h	BYTE	"FLAGS"
184h	BYTE	"SESSNOAD"
193h	BYTE	"STNAD"
198h	BYTE	"NSDS"
Note:	offsets are from the interrupt handler's segment

INT 21 U - IBM SYSTEM 36/38 WORKSTATION EMULATION - VDI.SYS - GET ???
	AX = 4402h
	BX = handle for character device "GDMS"
	CX = number of bytes to read (>= 4)
	DS:DX -> buffer (see #01445)
Return: CF set on error
	    AX = error code (see #01680 at AH=59h/BX=0000h)
	CF clear if successful
	    AX = number of bytes read

Format of System 36/38 emulator returned data:
Offset	Size	Description	(Table 01445)
 00h  4 BYTEs	???
 04h	DWORD	pointer to ???
 08h  4 BYTEs	???

INT 21 - Attachmate Extra! - GET 3270 DISPLAY STATE
	AH = A0h
Return: AL = display status (see #01796)
	BX = host window status (see #01797)
Program: Attachmate Extra! is a 3270 emulator by Attachmate Corporation
SeeAlso: AH=A1h

Bitfields for Attachmate Extra! display status:
Bit(s)	Description	(Table 01796)
 7	0=windowed, 1=enlarged
 6-3	current screen profile number 0-9
 2-0	active window number (0=PC, 1-4=host B-E, 5-6=notepad F-G)

Bitfields for host window status:
Bit(s)	Description	(Table 01797)
 15	reserved
 14	0=host E window installed, 1=not
 13	0=host E terminal on, 1=off
 12	0=host E window displayed, 1=not
 11	reserved
 10	0=host D window installed, 1=not
 9	0=host D terminal on, 1=off
 8	0=host D window displayed, 1=not
 7	reserved
 6	0=host C window installed, 1=not
 5	0=host C terminal on, 1=off
 4	0=host C window displayed, 1=not
 3	reserved
 2	0=host B window installed, 1=not
 1	0=host B terminal on, 1=off
 0	0=host B window displayed, 1=not

INT 21 - Attachmate Extra! - SET 3270 DISPLAY STATE
	AH = A1h
	AL = new display status byte (see #01796)
SeeAlso: AH=A0h,AH=A2h

INT 21 - Attachmate Extra! - SET HOST WINDOW STATE
	AH = A2h
	AL = new host window status byte (see #01798)
SeeAlso: AH=A1h

Bitfields for Attachmate Extra! host window status:
Bit(s)	Description	(Table 01798)
 7	0=power off, 1=power on
 6	0=not installed, 1=installed
 5-3	reserved
 2-0	window number 1-4=host B-E

INT 21 - Attachmate Extra! - SEND KEYSTROKES TO HOST WINDOW
	AH = A3h
	AL = window number (1-4=host B-E)
	CX = 0001h
	DS:BX -> keystroke buffer
	DL = zero if keystroke buffer contains host function code (see #01799),
	      non-zero if keystroke buffer contains ASCII character
Return: CX = zero if character sent, non-zero if not
	BX incremented if CX=0

(Table 01799)
Values for Attachmate Extra! host function code:
 00h=reserved	10h=PF16	20h=Clear	30h=SysReq
 01h=PF1	11h=PF17	21h=Print	31h=ErInp
 02h=PF2	12h=PF18	22h=Left	32h=ErEof
 03h=PF3	13h=PF19	23h=Right	33h=Ident
 04h=PF4	14h=PF20	24h=Up		34h=Test
 05h=PF5	15h=PF21	25h=Down	35h=Reset
 06h=PF6	16h=PF22	26h=Home	36h=DevCncl
 07h=PF7	17h=PF23	27h=Fast Left	37h=Dup
 08h=PF8	18h=PF24	28h=Fast Right	38h=FldMark
 09h=PF9	19h=Alt on	29h=Bksp	39h=Enter
 0Ah=PF10	1Ah=Alt off	2Ah=Insert	3Ah=CrSel
 0Bh=PF11	1Bh=Shift on	2Bh=Delete
 0Ch=PF12	1Ch=Shift off	2Ch=Backtab
 0Dh=PF13	1Dh=PA1		2Dh=Tab
 0Eh=PF14	1Eh=PA2		2Eh=Newline
 0Fh=PF15	1Fh=PA3		2Fh=Attn

INT 21 - Attachmate Extra! - GET HOST WINDOW BUFFER ADDRESS
	AH = A4h
	AL = window number (1-4=host B-E)
Return: DS:BX -> 3270 display buffer
SeeAlso: AH=A5h,AH=B8h

INT 21 - Attachmate Extra! - GET HOST WINDOW CURSOR POSITION
	AH = A5h
	AL = window number (1-4=host B-E)
Return: BX = cursor position (80 * row + column, where 0:0 is upper left)
Note:	if the host window is configured with the Extended Attribute (EAB)
	  feature, multiply the cursor position by 2 to obtain the byte offset
	  into the display buffer
SeeAlso: AH=A4h

INT 21 - Attachmate Extra! - GET TRANSLATE TABLE ADDRESS
	AH = AFh
Return: DS:BX -> translate tables (see #01800)

Format of Attachmate Extra! translate tables:
Offset	Size	Description	(Table 01800)
 00h 256 BYTEs	ASCII to 3270 buffer code translate table
100h 256 BYTEs	3270 buffer code to ASCII translate table
200h 256 BYTEs	3270 buffer code to EBCDIC translate table
300h 256 BYTEs	EBCDIC to 3270 buffer code translate table

INT 21 - Attachmate Extra! - DISABLE HOST BUFFER UPDATES
	AH = B8h
	AL = window number (1-4=host B-E)
	DL = 01h
Notes:	only valid in CUT mode
	next AID keystroke (eg Enter) enables host buffer updates
SeeAlso: AH=A4h

INT 2A U - IBM PC 3270 EMULATION PROGRAM - ???
	AH = 90h
	???
Return: ???
Note:	the LANtastic redirector and SERVER.EXE use this function with AL=01h,
	  03h-07h,0Ch-11h

INT 2F - IBM PC3270 EMULATION PROG v3 - INSTALLATION CHECK
	AX = B400h
Return: AL = FFh if installed

INT 2F - IBM PC3270 EMULATION PROG v3 - GET HOST BUFFER ADDRESS
	AX = B401h
Return: ES -> host screen buffer (PC ASCII format)
	ES unchanged if communications not started

INT 2F - IBM PC3270 EMULATION PROG v3 - ???
	AX = B402h
	BX = ???
Return: ???

INT 2F - IBM PC3270 EMULATION PROG v3 - ???
	AX = B403h
	???
Return: ???

INT 2F - IBM PC3270 EMULATION PROG v3 - ???
	AX = B404h
	???
Return: ???

INT 2F - IBM PC3270 EMULATION PROG v3 - ???
	AX = B405h
	???
Return: ???

INT 44 - IBM 3270-PC High Level Language API
	DS:SI -> parameter control block

INT 60 u - 3270-PC CONTROL PROGRAM - ???

INT 61 - Sangoma CCIP (CCPOP 3270 resident module) INTERFACE
	BX:DX -> control block
SeeAlso: INT 67"Sangoma"

INT 61 - Banyan VINES - 3270 INTERFACE
	AX = 0002h
	BH = function number (see #03346)
	DS:CX -> argument block (except BH=00h,1Ah) (see #03348)
Return: AX = status (see #03347)
Notes:	Either 3270/SNA or 3270/BSC interface may use AX=0002h, depending on
	  which is loaded first.  The other interface will use AX=000Ah
	Status codes greater than 63h indicate an inconsistency in the 3270/SNA
	  or 3270/BSC resident driver, which must be reloaded by the user

(Table 03346)
Values for VINES 3270 interface function number:
 00h "pi2reset"	 reset 3270/SNA or 3270/BSC driver
 02h "pi2bsc"	 (3270/BSC only)
 03h "pi2get"	 get information stored in 3270 resident driver
 04h "pi2put"	 store information in 3270 resident driver
 05h "pi2gcur"	 get current screen position
 07h "pi2sdat"	 send data keystroke
 08h "pi2scom"	 send command keystroke
 0Ah "pi2field"	 get field info for arbitrary screen positions
 0Fh "pi2stat"	 get logical unit/device status
 12h "pi2nlus"	 determine logical unit/device assignment
 13h "pi2gate"	 specifies comm port address to gateway service
 14h "pi2attach" attach a logical unit/device
 15h "pi2sdev"	 save logical unit/device info in resident driver
		(not supported in >3.0)
 16h "pi2gdev"	 get device information (not supported in >3.0)
 17h "pi2luinfo" get info about specific logical unit/device
 18h "pi2gerr"	 get finer error detail
 19h "pi2dhold"	 (3270/SNA only)  holds a 3270 device
 1Ah "pi2shut"	 release memory-resident module
 1Ch "pi2sprof"	 save profile info in res driver (not supp in >3.0)
 1Dh "pi2gprof"	 get prevsly stored profile info (not supp in >3.0)

(Table 03347)
Values for VINES 3270 status:
 0000h	successful
 000Bh	invalid parameter or data does not fit data area
 000Ch	another code path currently active in resident driver
 000Dh	operation currently not allowed
 0032h	encountered connection disconnect error
 0033h	encountered "sosend" completion error
 0034h	encountered "sosend" communication error
 0035h	attach request refused.	extended error info via "pi2gerr":
	01h resource unavailable
	02h invalid type
	03h version mismatch
	04h invalid logical unit number
	05h error during ARL processing
	06h no access for user
 0071h	encountered "sosock" error
 0072h	encountered unrecognizable error
 0073h	encountered "sowait" error (extended info via "pi2gerr")
 0074h	encountered invalid type-of-request on "sowait"
 0075h	encountered "sorec" error (extended info via "pi2gerr")
 0076h	encountered "sorec" completion error (ext info via "pi2gerr")
 0077h	encountered connection request
 0078h	encountered unrecognizable data
 0079h	encountered unknown connection ID (ext info via "pi2gerr")
SeeAlso: #03325

Format of argument block for BH=03h,04h:
Offset	Size	Description	(Table 03348)
 00h	WORD	size of data area (max 256)
 02h  N BYTEs	data area
SeeAlso: #03349,#03350,#03351

Format of argument block for BH=05h:
Offset	Size	Description	(Table 03349)
 00h	WORD	logical unit/device number
 02h	WORD	pointer to WORD buffer for cursor index
 04h	WORD	pointer to BYTE buffer for current field attribute
SeeAlso: #03348,#03350,#03351

Format of argument block for BH=07h:
Offset	Size	Description	(Table 03350)
 00h	WORD	logical unit/device number
 02h	WORD	ASCII data byte
 04h	WORD	pointer to WORD count of characters which will need updating
SeeAlso: #03348,#03349,#03351

Format of argument block for BH=08h:
Offset	Size	Description	(Table 03351)
 00h	WORD	logical unit/device number
 02h	WORD	3270 keystroke (see #03352)
SeeAlso: #03348,#03349,#03350,#03353

(Table 03352)
Values for 3270 keystroke:
 0000h	Enter
 0001h	Clear
 0002h	PA1
 0003h	PA2
 0004h	PA3
 0005h	PF1
 ...
 001Ch	PF24
 001Dh	CSELECT (cursor select)
 001Eh	Insert
 001Fh	Delete
 0020h	EOField
 0021h	EINPUT (erase input)
 0022h	Reset
 0023h	Attention
 0024h	SysReq
 0025h	Duplicate
 0026h	Fieldmark
 0027h	Home
 0028h	NextLine
 0029h	Tab
 002Ah	BackTab
 002Bh	cursor up
 002Ch	cursor down
 002Dh	cursor right
 002Eh	cursor left
 002Fh	double cursor right
 0030h	double cursor left
 0031h	PRINT
 0032h	CANCEL
 0033h	Backspace

Format of argument block for BH=0Ah:
Offset	Size	Description	(Table 03353)
 00h	WORD	logical unit/device number
 02h	WORD	screen index
 04h	WORD	pointer to WORD buffer for field length
 06h	WORD	pointer to WORD buffer for offset in screen of field start
SeeAlso: #03351,#03354

Format of argument block for BH=0Fh:
Offset	Size	Description	(Table 03354)
 00h	WORD	logical unit/device number
 02h	WORD	clear mask (clear these bits of status after returning status)
 04h	WORD	pointer to WORD buffer for device status (see #03355)
SeeAlso: #03353,#03356

Bitfields for Banyan 3270 device status:
Bit(s)	Description	(Table 03355)
 10	status modified
 9	buffer modified
 8	set cursor
 5	sound alarm
 1-0	size of print line for printer logical units
	00  unformatted line
	01  40-character line
	10  64-character line
	11  80-character line

Format of argument block for BH=12h:
Offset	Size	Description	(Table 03356)
 00h	WORD	pointer to WORD buffer for number of logical units or devices
 02h	WORD	pointer to WORD buffer for version number
 04h	WORD	pointer to 64-byte buffer for logical unit/device list
SeeAlso: #03354,#03357

Format of argument block for BH=13h:
Offset	Size	Description	(Table 03357)
 00h 16 BYTEs	communications port address (see #03328)
SeeAlso: #03356,#03358

Format of argument block for BH=14h:
Offset	Size	Description	(Table 03358)
 00h	WORD	logical unit/device number
		0000h attach any free device of the specified type
 02h	WORD	logical unit/device type
		(3270/SNA) 01h, 02h, or 03h
		(3270/BSC) 02h display
		(3270/BSC) 03h printer
 04h	WORD	pointer to WORD buffer for attached logical unit/device number
SeeAlso: #03357,#03359

Format of argument block for BH=16h:
Offset	Size	Description	(Table 03359)
 00h	WORD	pointer to 18-byte buffer for device block (see #03364)
		first WORD must be set to desired logical unit/device number
SeeAlso: #03358,#03360

Format of argument block for BH=17h:
Offset	Size	Description	(Table 03360)
 00h	WORD	logical unit/device number
 02h	WORD	pointer to information block in caller's DS (see #03365)
SeeAlso: #03359,#03361

Format of argument block for BH=18h:
Offset	Size	Description	(Table 03361)
 00h	WORD	pointer to WORD buffer for major error code
 02h	WORD	pointer to WORD buffer for minor error code
SeeAlso: #03360,#03362

Format of argument block for BH=19h:
Offset	Size	Description	(Table 03362)
 00h	WORD	logical unit/device number
SeeAlso: #03361,#03363

Format of argument block for BH=1Ch,1Dh:
Offset	Size	Description	(Table 03363)
 00h	WORD	pointer to profile block in caller's DS (see #03368)
SeeAlso: #03348,#03362

Format of device block, argument block for BH=15h:
Offset	Size	Description	(Table 03364)
 00h	WORD	logical unit/device number
 02h	WORD	logical unit/device type
 04h	WORD	display model number
 06h	WORD	numeric checking
 08h	WORD	status line
 0Ah	BYTE	unprotected normal field attribute
 0Bh	BYTE	unprotected intensified field attribute
 0Ch	BYTE	protected normal field attribute
 0Dh	BYTE	protected intensified field attribute
 0Eh	WORD	reserved
 10h	WORD	printer port number

Format of information block:
Offset	Size	Description	(Table 03365)
 00h	WORD	device model number
 02h	DWORD	screen buffer pointer
 06h	DWORD	status line pointer (see #03366)
 0Ah	DWORD	reserved

Format of Banyan VINES 3270 status line:
Offset	Size	Description	(Table 03366)
 00h	BYTE	comm line status
		00h inactive
		01h active
 01h	BYTE	activation level
		01h physical unit activated
		02h logical unit also activated
		03h session is bound
 02h	BYTE	data traffic state
		00h inactive
		01h active
 03h	BYTE	screen ownership
		00h SLU->PLU session owns screen
		01h SLU->SSCP session owns screen
 04h	BYTE	keyboard status (see #03367)
 05h	BYTE	insert mode
		01h if in insert mode
 06h	BYTE	numeric
		01h if current screen buffer is numeric only
 07h	BYTE	printer status
		00h printer not assigned
		01h printer is inactive
		02h printer error
		03h currently printing
		04h printer is busy
		05h printer is very busy
 08h	BYTE	printer assignment
 09h	BYTE	maximum size of network name
 0Ah  N BYTEs	ASCIZ network name
	BYTE	maximum size of message window
      M BYTEs	null-terminated message window
	BYTE	code set
		00h EBCDIC
		01h ASCII
      M BYTEs	extended attributes
		01h extended attributes are in effect (stored at screen+1920)
		    each extended attribute specifies
		    bits 0,1: 00=normal, 01=blink, 10=reverse, 11=underscor
		    bits 2-4: 000=default,001=blue,010=red,011=pink,
			      100=green,101=turquoise,110=yellow,111=white
	BYTE	extended color
		01h other than base color is in effect

(Table 03367)
Values for Banyan VINES 3270 keyboard status:
 00h	UNLOCK - ready to accept data
 01h	TIME - aid was struck
 02h	SYSTEM - received response no restore
 03h	FUNCTION - unavailable keyboard function
 04h	INPUT - not currently used
 05h	ENDFIELD - field filled in insert mode
 06h	PROTECTED - attempt to enter in protected field
 07h	NUMERIC - attempt to enter in numeric field
 08h	PROGRAM - error in outbound data stream

Format of Banyan VINES 3270 profile block:
Offset	Size	Description	(Table 03368)
 00h 64 BYTEs	gateway service name
 40h 16 BYTEs	gateway comm port address
 50h	WORD	primary logical unit number
 52h	WORD	secondary logical unit type
 54h	WORD	secondary logical unit number
 56h	WORD	printer assignment
 58h 50 BYTEs	keyboard definitions filename

INT 67 - Sangoma CCPOP 3270 resident module
SeeAlso: INT 61"Sangoma",INT 68"Sangoma"

INT 68 - Sangoma CCPOP 3270 resident module
SeeAlso: INT 67"Sangoma",INT 92"Sangoma"

INT 7A - IBM 3270 Workstation Program API - CREATE A QUEUE
	AH = 04h
	???
Return: ???
SeeAlso: AH=06h

INT 7A - IBM 3270 Workstation Program API - DELETE A QUEUE
	AH = 06h
	???
Return: ???
SeeAlso: AH=04h

INT 7A - IBM 3270 Workstation Program API - SESSION SERVICES
	AH = 09h
	BX = 8020h (synchronous request)
	CX = 0000h
	DX = ID of session manager (SESSMGR)
	AL = service (see #03834)
	ES:DI -> control block
Return: ???

(Table 03834)
Values for service:
 01h	get session ID
 02h	get session info
 04h	dettach from session
 05h	attach to session
 06h	get list of windows available
 07h	get environment of window
 08h	get 'PIF' (program information file) info
 0Ah	get base window ID
 0Bh	get cursor info

INT 7A - IBM 3270 Workstation Program API - KEYBOARD SERVICES
	AH = 09h
	BX = 8020h (synchronous request)
	CX = 0000h
	DX = ID of keyboard manager
	AL = service number (see #03835)
	ES:DI -> control block
Return: ???

(Table 03835)
Values for 3270 Workstation Program keyboard service:
 01h	connect to keyboard
 02h	disconnect from keyboard
 03h	read from keyboard
 04h	send keystroke to session
 05h	disable input
 06h	enable input
 07h	update status code

INT 7A - IBM 3270 Workstation Program API - WINDOW SERVICES
	AH = 09h
	BX = 8020h (synchronous request)
	CX = 00FFh
	DX = ID of window service controller (WSCTRL)
	AL = service number (see #03836)
	ES:DI -> control block
Return: ???

(Table 03836)
Values for 3270 Workstation Program window service:
 01h	connect to WS control
 02h	disconnect from WS control
 03h	add a window
 04h	change window's position on screen
 05h	change window's size
 06h	change window's color
 07h	change window's position in the presentation space
 08h	hide/unhide toggle
 09h	enlarge/reduce toggle
 0Ah	change screen background color
 0Bh	get window's position on screen
 0Ch	get window's size
 0Dh	get window's color
 0Eh	get window's position in the presentation space
 0Fh	determine whether hidden
 10h	determine whether enlarged
 11h	get background color
 12h	get window names
 13h	delete all windows from profile
 14h	pick active window
 15h	redraw screen
 16h	redraw window
 17h	delete a window from profile
 18h	get active window
 19h	get active screen
 1Ah	get window data
 1Bh	change window data
 1Ch	select active screen

INT 7A - IBM 3270 Workstation Program API - PRESENTATION SPACE SERVICES
	AH = 09h
	BX = 8020h
	CX = 00FFh
	DX = ID of PCPSM
	AL = service
	    01h define presentation space
	    02h delete presentation space
	    03h display presentation space
	    04h position cursor in presentation space
	    05h change default presentation space
	ES:DI -> control block
Return: ???

INT 7A - IBM 3270 Workstation Program API - 3270 EMULATION
	AH = 09h
	BX = 8020h
	CX = 00FFh
	DX = ID of 3270EML
	AL = service
	    01h connect
	    02h disconnect
	ES:DI -> control block
Return: ???

INT 7A - IBM 3270 Workstation Program API - OPERATOR INFORMATION AREA
	AH = 09h
	BX = 8020h
	CX = 00FFh
	DX = ID of OIAM
	AL = service
	    01h read Operator Information Area
	    02h read OIA subset
	ES:DI -> control block
Return: ???
Note: the OIA is the 25th line on the Host session

INT 7A - IBM 3270 Workstation Program API - TRANSLATE DATA
	AH = 09h
	BX = 8020h
	CX = 00FFh
	DX = ID of XLATE
	AL = service
	    01h translate from host characters to ASCII and vice versa
		(determined by control block byte 11)
	ES:DI -> control block
Return: ???

INT 7A - IBM 3270 Workstation Program API - COPY SERVICE
	AH = 09h
	BX = 8020h
	CX = 00FFh
	DX = ID of copy service
	AL = service
	    01h copy string from one presentation space to another
	    02h copy block from one presentation space to another
	    03h connect to PC session for copy
	    04h disconnect PC session from copy
	ES:DI -> control block
Return: ???

INT 7A - IBM 3270 Workstation Program API - Multi-DOS
	AH = 09h
	BX = 8020h
	CX = 00FFh
	ES:DI -> control block
	DX = ID of INDJQRY
		get environment size
	   = ID of INDJASY
		request DOS functions from workstation
	   = ID of MEMORY
		AL = function
		    01h allocate memory
		    02h deallocate memory
		    03h modify allocated size
Return: ???

INT 7A - IBM 3270 Workstation Program API - HOST SERVICES
	AH = 09h
	BX = request type (4000h async, 8028h synchronous)
	CX = 0000h
	DX = ID of MFIC
	AL = service (see #03837)
	ES:DI -> control block

(Table 03837)
Values for 3270 Workstation Program host service:
 01h	connect to host
 02h	disconnect from host
 03h	read DFT structured data from host
 04h	write DFT structured data to host
 05h	create a host buffer

INT 7A - IBM 3270 Workstation Program API - GET DATA FROM A QUEUE
	AH = 13h
	???
Return: ???

INT 7A - IBM 3270 Workstation Program API - RESOLVE A GATE NAME
	AH = 81h
	ES:DI -> 8-char blank-padded gate name (see #03838)
Return: DX = gate ID

(Table 03838)
Values for 3270 Workstation Program gate name:
 "SESSMGR "
 "KEYBOARD"
 "WSCTRL  "
 "MFIC	  "
 "PCPSM	  "
 "3270EML "
 "COPY	  "
 "XLATE	  "
 "OIAM	  "
 "MEMORY  "
 "INDJQRY "
 "INDJASY "

INT 7A - IBM 3270 Workstation Program API - GET COMPLETION RESULTS
	AH = 83h
	???
Return: ???

INT 7A - IBM Personal Communications/3270 - INSTALLATION CHECK
	AX = FDCBh
Return: DX:AX -> PCS/3270 signature block if loaded (see #03839)

Format of Personal Communications/3270 signature block:
Offset	Size	Description	(Table 03839)
 04h	WORD	PCS/3270 signature (5741h)
 06h	WORD	version (0501h = PCS/3270 v1.0)

INT 7A - IBM PC3270 EMUL PROG v3 - INTERNAL SEND/RECEIVE FUNCTION
	AX = FE01h
	???
Return: ???
SeeAlso: AX=FE02h

INT 7A - IBM PC3270 EMUL PROG v3 - INTERNAL SEND/RECEIVE FUNCTION
	AX = FE02h
	???
Return: ???
SeeAlso: AX=FE01h

INT 7A - IBM PC3270 EMUL PROG v3 - INTERNAL API INITIALIZATION
	AX = FF01h
	ES:DI -> API function handler routine
Return: CX = 1200h
SeeAlso: AX=FF02h,AX=FF03h

INT 7A - IBM PC3270 EMUL PROG v3 - INTERNAL API TERMINATION
	AX = FF02h
Return: CX = 1200h
SeeAlso: AX=FF01h

INT 7A - IBM PC3270 EMUL PROG v3 - INTERNAL API INITIALIZATION
	AX = FF03h
	ES:DI -> send/receive function handler routine
Return: CX = 1200h
SeeAlso: AX=FF01h

INT 7A U - IBM PC3270 EMUL PROG v3 - INTERNAL ???
	AX = FF04h
	ES:DI -> ???
Return: CX = 1200h

INT 7B - Eicon Access API (3270/5250 gateways)
SeeAlso: INT 5C"NetBIOS"

INT 7F - HLLAPI (IBM 3270 High-Level Language API)/LLAPI (Rabbit Low Level API)
	AX = 0104h (HLLAPI gate ID)
	BX = 0000h
	DS:SI -> parameter control block (see #03872)
Return: parameter control block updated
InstallCheck:	for the Novell HLLAPI TSR, test for the signature "CXI" (for
	  the company Novell bought) immediately prior to the interrupt handler
SeeAlso: AX=0105h,AX=ABCDh

Format of HLLAPI parameter control block:
Offset	Size	Description	(Table 03872)
 00h  3 BYTEs	signature = 'PCB'
 03h	BYTE	function number (see #03873,#03874)
 04h	WORD	segment of control string
 06h	WORD	offset of control string
 08h	WORD	length of control string, unless explicit end-of-str char set
 0Ah	BYTE	unused (IBM)
		ControlString[0] (Rabbit)
 0Bh	WORD	return code (see #03876)
 0Dh	WORD	maximum length of control string (IBM)
		unused (Rabbit)

(Table 03873)
Values for HLLAPI function number:
 00h	OEM function (Query system for Attachmate implementation)
 01h	Connect presentation space
 02h	Disconnect presentation space
 03h	Send string of keystrokes as if typed from keyboard
 04h	Wait ~60s, returns status of presentation space
 05h	Copy current presentation space into a user-defined buffer
 06h	Search presentation space for first occurrence of a specified string
 07h	Query cursor location in current presentation space
 08h	Copy part or all of current presentation space into user buffer
 09h	Set session parameters; parameters vary by vendor (see #03875)
 0Ah	Get info on sessions currently connected
 0Bh	Lock current presentation space
 0Ch	Unlock previously locked presentation space
 0Dh	Return copy of operator info area (OIA) of current presentation space
 0Eh	get attribute byte for given position in the current presentation space
 0Fh	copy string of characters to the current presentation space
 10h	workstation control functions
 11h	storage manager functions, intended primarily for BASIC applications
	(not implemented by Rabbit)
 12h	set delay period in half-second intervals
 14h	get info on level of workstation support used
 15h	reset session parameters to default values
 16h	get detailed info on the current session
 17h	start host notification to application on presentation sp or OIA update
 18h	check host update when host notification enabled
 19h	stop host notification
 1Eh	search field within current presentation space for string
 1Fh	get first positionof a selected field in the current presentation space
 20h	get length of specified field
 21h	copy string into a specified field
 22h	copy specified field into a user-defined buffer
 23h	create alternate presentation space (IBM only), don't use with BASIC
 24h	switch to alternate presentation space (IBM only), not with BASIC
 25h	display cursor in specified area (IBM only), don't use with BASIC
 26h	display alternate presentation space (IBM only), don't use with BASIC
 27h	delete alternate presentation space (IBM only), don't use with BASIC
 28h	set cursor
 29h	start Close Intercept
 2Ah	query Close Intercept
 2Bh	stop Close Intercept
 32h	start intercepting keystrokes to allow filtering
 33h	get keystrokes after turning on interception
 34h	notify operator when keystroke rejected by filter subroutine
 35h	stop intercepting keystrokes
 5Ah	send file
 5Bh	receive file
 5Ch	run a program (not implemented by Rabbit)
 5Dh	execute DOS command (not implemented by Rabbit)
 63h	change presentation space position to PC display row/col or vice versa
 65h	connect to Window Services
 66h	disconnect from Window Services
 67h	set/query window coordinates
 68h	set/query window status
 69h	change presentation space name
 78h	connect Structured Fields
 79h	disconnect Structured Fields
 7Ah	query size of communications buffer
 7Bh	allocate communications buffer
 7Ch	free communications buffer
 7Dh	get request completion state
 7Eh	read Structured Fields
 7Fh	write Structured Fields
 FFh	Get info on DCA implementation

(Table 03874)
Values for LLAPI function number:
 80h	initialize LLAPI (internal call)
 83h	set Session ID (one-character ID)
 84h	read Session ID (one-character ID)
 85h	lock 327x keyboard
 86h	unlock 327x keyboard
 87h	wait for Clear to Send
 88h	type ASCII character
 89h	type 327x key
 8Ah	read keyboard lock state
 8Fh	force screen update
 90h	view session
 91h	relinquish (suspend foreground until background becomes idle)
 92h	poke screen character
 93h	poke translated character
 94h	peek screen character
 95h	peek translated character
 96h	set cursor position
 97h	send scan code (Rabbit only)
 98h	synchronize (returns after keystroke queue empty)
 99h	type PC key (Rabbit only)

(Table 03875)
Values for HLLAPI Function 09h Session Parameters:
 ASCII		??? (Rabbit only)
 ATTRIB		return attributes in hex
 NOATTRIB	return attributes as blanks
 CONPHYS	make physical connection
 CONLOG		only make logical connection
 EAB		copy extended attribute bytes along with data
 NOEAB		copy data only
 ESC=n		set escape character to "n" (default '@')
 EOT=n		set end of string character (default 00h)
 FPAUSE		full-duration pause
 FTNOWAIT	return immediately from functions 5Ah and 5Bh (Rabbit only)
 FTWAIT		wait for file transfer to complete (Rabbit only)
 IPAUSE		interruptable pause
 RABESC		??? (Rabbit only)
 NORABESC	??? (Rabbit only)
 SCANCODE	??? (Rabbit only)
 STRLEN		use explicit string lengths
 STREOT		use terminated strings
 SRCHALL	search entire presentation space
 SRCHFROM	search from specified offset
 SRCHFRWD	search forward from position 1
 SRCHBKWD	search backward from last position in presentation space
 TIMEOUT=n	??? (Rabbit only)
 TWAIT		wait specified time for keyboard ready
 LWAIT		wait until keyboard ready
 NWAIT		no wait
 TRON		enable tracing
 TROFF		disable tracing
 AUTORESET	send reset before sending keys with function 03h
 NORESET	don't send reset
 QUIET		don't display messages sent with INT 21/AH=09h
 NOQUIET	allow messages to be displayed
 TIMEOUT=n	set timeout in 30-second intervals, 0 = wait until ^Break
 XLATE		translate extended attribute bytes
 NOXLATE	don't translate
 NEWRET		use HLLAPI v3.0 return code conventions
 OLDRET		use HLLAPI v2.0 return code conventions

(Table 03876)
Values for Windows HLLAPI return code:
 00h	successful
 01h	Presentation Space not connected/requested size unavailable
 02h	invalid function or parameter error/invalid block ID
 03h	file transfer complete
 04h	file transfer complete (segmented)/Presentation Space busy
 05h	inhibited or keyboard locked
 06h	data truncated
 07h	invalid Presentation Space position
 08h	operation not available
 09h	system error
 0Ah	blocking error
 0Bh	resource not available
 0Ch	session stopped
 14h	undefined key combination
 15h	OIA updated
 16h	Presentation Space updated
 17h	both Presentation Space and OIA updated
 18h	no such field
 19h	no keystrokes available
 1Ah	Presentation Space or Operator Information Area changed
 1Bh	file transfer aborted
 1Ch	zero-length field
 1Eh	cursor type invalid
 1Fh	keystroke overflow
 20h	another application is already connected
 22h	message sent to host cancelled
 23h	transmission from host cancelled
 24h	lost contact with host
 25h	function successful
 26h	function incomplete
 27h	a DDM session is already connected
 28h	disconnected, but asynchronous requests still pending
 29h	buffer already in use
 2Ah	no matching request found
12Dh	invalid function number
12Eh	file not found
131h	access denied
134h	out of memory
136h	environment invalid
137h	format invalid
270Eh (9998) invalid Presentation Space ID
270Fh (9999) invalid row or column code
---Windows HLLAPI extensions---
F000h	asynchronous call already in progress
F001h	invalid asynchronous task ID
F002h	blocking call cancelled
F003h	underlying subsystem not started
F004h	unsupported application version