Index for interrupt INT 6A

Table of Contents by Order
6A - INT 6A - OPTHELP.COM
6A - INT 6A - DECnet DOS - LOCAL AREA TRANSPORT PROGRAM - INSTALLATION CHECK
6A - INT 6A C - HP Vectra AT - IRQ18 - RESERVED HARDWARE INTERRUPT
6A0000 - INT 6A U - Super-TCP DOS TSR Kernel v3.57 - INSTALLATION CHECK
6A0001 - INT 6A U - Super-TCP DOS TSR Kernel v3.57 - ???
6A0002 - INT 6A U - Super-TCP DOS TSR Kernel v3.57 - ???
6A0003 - INT 6A U - Super-TCP DOS TSR Kernel v3.57 - GET ??? DATA AREA
6A0004 - INT 6A U - Super-TCP DOS TSR Kernel v3.57 - ALLOCATE ???
6A0005 - INT 6A U - Super-TCP DOS TSR Kernel v3.57 - FREE/CLOSE ???
6A000F - INT 6A U - Super-TCP DOS TSR Kernel v3.57 - FREE/CLOSE ALL ???
6A0010 - INT 6A U - Super-TCP DOS TSR Kernel v3.57 - UNINSTALL
6A01--DHFF - INT 6A - DECnet DOS LOCAL AREA TRANSPORT - SEND BYTE
6A02--DHFF - INT 6A - DECnet DOS LOCAL AREA TRANSPORT - READ BYTE
6A03--DHFF - INT 6A - DECnet DOS LOCAL AREA TRANSPORT - STATUS
6AD0--DHFF - INT 6A - DECnet DOS LOCAL AREA TRANSPORT - OPEN SESSION
6AD000DHFF - INT 6A - DECnet DOS LOCAL AREA TRANSPORT - CLOSE SESSION
6AD100DHFF - INT 6A - DECnet DOS LOCAL AREA TRANSPORT - SEND BREAK
6AD300DHFF - INT 6A - DECnet DOS LOCAL AREA TRANSPORT - RESET LAT COUNTERS
6AD400DHFF - INT 6A - DECnet DOS LOCAL AREA TRANSPORT - COPY LAT COUNTERS
6AD500DHFF - INT 6A - DECnet DOS LOCAL AREA TRANSPORT - GET NEXT LAT SERVICE NAME
6AD600DHFF - INT 6A - DECnet DOS LOCAL AREA TRANSPORT - LAT SERVICE TABLE RESET

INT 6A - OPTHELP.COM
Program: OPTHELP is an optionally-resident help system for SLR Systems's OPTASM
	  assembler
Range:	INT 60h to INT 7Fh, selected by configuration

INT 6A - DECnet DOS - LOCAL AREA TRANSPORT PROGRAM - INSTALLATION CHECK
InstallCheck:	test for a signature area immediately preceding the interrupt
	  handler (see #03715)
SeeAlso: AH=01h/DH=FFh,INT 6B"DECnet",INT 6D"DECnet"
Index:	installation check;DECnet DOS Local Area Transport

Format of DECnet DOS signature area:
Offset	Size	Description	(Table 03715)
 -5	BYTE	major version number
 -4	BYTE	minor version number
 -3   3 BYTEs	signature (ASCII "LAT")

INT 6A C - HP Vectra AT - IRQ18 - RESERVED HARDWARE INTERRUPT
SeeAlso: INT 0A"IRQ2",INT 69"HP Vectra",INT 6B"HP Vectra"

INT 6A U - Super-TCP DOS TSR Kernel v3.57 - INSTALLATION CHECK
	AX = 0000h
Return: AX = 4357h ('CW')
Program: Super-TCP is a TCP/IP protocol stack by Frontier Technologies Corp.
Note:	an alternate installation check is to test for the ASCIZ signature
	  "FTC Super-TCP" three bytes past the interrupt handler
SeeAlso: AX=0001h,AX=0002h,AX=000Fh,AX=0010h,INT 21/AH=3Fh"BW-TCP"
SeeAlso: INT 61"FTP Software",INT 62/AH=00h"ETHDEV"

INT 6A U - Super-TCP DOS TSR Kernel v3.57 - ???
	AX = 0001h
	BH = function number
	    01h ???
		DS:SI -> ??? 24-byte record1 (see #03717)
		ES:DI -> buffer containing ???
	    02h ???
		DS:SI -> ??? 18-byte record2 (see #03718)
		ES:DI -> buffer containing ???
	    04h ???
		BL = subfunction
		    01h
			DS:SI -> ??? 28-byte record3 (see #03719)
			ES:DI -> buffer containing ???
		    02h
			DS:SI -> ??? 28-byte record3 (see #03719)
			ES:DI -> buffer containing ???
		    03h
			DS:SI -> ??? 28-byte record3 (see #03719)
		    else Return: AX = 0005h
	    05h ???
		DS:SI -> ??? 20-byte record4 (see #03720)
		ES:DI -> buffer containing ???
	    06h ???
		BL = subfunction
		    01h
			DS:SI -> ??? 40-byte record5 (see #03721)
		    02h
			DS:SI -> ??? 20-byte record6 (see #03722)
			ES:DI -> ???
		    03h
			DS:SI -> ??? 20-byte record6 (see #03722)
		    04h
			DS:SI -> ??? 46-byte record7 (see #03723)
		    else Return: AX = 0005h
	    11h ???
		DS:SI -> ??? 28-byte record8 (see #03724)
		ES:DI -> ???
Return: AX = function status (see #03716)
SeeAlso: AX=0000h

(Table 03716)
Values for Super-TCP function status:
 0000h	successful
 0005h	unsupported function
 000Ah	out of memory

Format of record1:
Offset	Size	Description	(Table 03717)
 00h  4 BYTEs	???
 04h	WORD	size of ES:DI buffer
 06h 18 BYTEs	???

Format of record2:
Offset	Size	Description	(Table 03718)
 00h  4 BYTEs	???
 04h	WORD	size of ES:DI buffer
 06h 12 BYTEs	???

Format of record3:
Offset	Size	Description	(Table 03719)
 00h  2 BYTEs	???
 02h	WORD	???
 04h	WORD	size of ES:DI buffer
 06h	WORD	???
 08h	WORD	operation number (for function 0401h)
 0Ah	DWORD	-> ???
 0Eh	WORD	(ret) ???
 10h 12 BYTEs	???

Format of record4:
Offset	Size	Description	(Table 03720)
 00h  4 BYTEs	???
 04h	WORD	size of ES:DI buffer
 06h 14 BYTEs	???

Format of record5:
Offset	Size	Description	(Table 03721)
 00h	BYTE	operation??? (00h-07h)
 01h	BYTE	???
 02h	WORD	(ret) ???
 04h	DWORD	-> ???
 08h  4 BYTEs	???
 0Ch	DWORD	-> ??? or 0000h:0000h
 10h 16 BYTEs	???
 20h	DWORD	???
 24h  4 BYTEs	???

Format of record6:
Offset	Size	Description	(Table 03722)
 00h  4 BYTEs	???
 04h	WORD	size of ES:DI buffer
 06h 14 BYTEs	???

Format of record7:
Offset	Size	Description	(Table 03723)
 00h	WORD	???
 02h	WORD	???
 04h	WORD	???
 06h 40 BYTEs	???

Format of record8:
Offset	Size	Description	(Table 03724)
 00h  4 BYTEs	???
 04h	WORD	size of ES:DI buffer
 06h  6 BYTEs	???
 0Ch	WORD	(ret) ???
 0Eh	WORD	operation??? (01h-03h)
 10h 12 BYTEs	???

INT 6A U - Super-TCP DOS TSR Kernel v3.57 - ???
	AX = 0002h
	BX = ??? (zero/nonzero)
	CX = ??? identifier (see AX=0004h)
	DS:SI -> 40-byte buffer for ??? or 0000h:0000h
	ES:DI -> buffer for ??? or 0000h:0000h
Return: AX = 0000h (successful) ???
	BL = ???
	BH = ???
	CX = ???
	DX = ???

INT 6A U - Super-TCP DOS TSR Kernel v3.57 - GET ??? DATA AREA
	AX = 0003h
Return: CX:DX -> data area (see #03725)

Format of Super-TCP data area:
Offset	Size	Description	(Table 03725)
 00h  2 BYTEs	???
 02h	DWORD	original INT 6A vector
 06h  2 BYTEs	???
 08h 96 BYTEs	array of 16 6-byte ???
 68h	WORD	number of elements of above array in use
 6Ah	WORD	???
	???

INT 6A U - Super-TCP DOS TSR Kernel v3.57 - ALLOCATE ???
	AX = 0004h
	CX = size in ???
Return: AX = 0000h (successful)
	CX = DX = ???
SeeAlso: AX=0005h,AX=000Fh

INT 6A U - Super-TCP DOS TSR Kernel v3.57 - FREE/CLOSE ???
	AX = 0005h
	CX = ??? identifier (from AX=0004h)
Return: AX = status (0000h successful, FFFFh failed)
SeeAlso: AX=0004h,AX=000Fh

INT 6A U - Super-TCP DOS TSR Kernel v3.57 - FREE/CLOSE ALL ???
	AX = 000Fh
Return: AX = 0000h (successful)
SeeAlso: AX=0000h,AX=0004h,AX=0005h

INT 6A U - Super-TCP DOS TSR Kernel v3.57 - UNINSTALL
	AX = 0010h
Return: AX = status
	    0000h successful
	    0002h can't uninstall, interrupt vector hooked by another program
Program: Super-TCP is a TCP/IP protocol stack by Frontier Technologies Corp.
Note:	if AX is not one of the values listed here on entry, Super-TCP
	  returns AX=FFFEh
SeeAlso: AX=0000h

INT 6A - DECnet DOS LOCAL AREA TRANSPORT - SEND BYTE
	AH = 01h
	DH = FFh
	AL = character
	DL = handle
Return: AH >= 80h on error
SeeAlso: AH=02h

INT 6A - DECnet DOS LOCAL AREA TRANSPORT - READ BYTE
	AH = 02h
	DH = FFh
	DL = handle
Return: AH < 80h if successful
	    AL = character
	AH >= 80h on error
SeeAlso: AH=01h

INT 6A - DECnet DOS LOCAL AREA TRANSPORT - STATUS
	AH = 03h
	DH = FFh
	DL = handle
Return: AH = status flags (see #03726)

Bitfields for DECnet DOS LAT status flags:
Bit(s)	Description	(Table 03726)
 5	transmit buffer empty
 3	session in start state
 2	session not active
 1	unable to queue transmit data
 0	receive data available

INT 6A - DECnet DOS LOCAL AREA TRANSPORT - OPEN SESSION
	AH = D0h
	DH = FFh
	AL = password flag
	    FFh no password
	    0Fh password at ES:DI
	ES:BX -> LAT session control block (see #03727)
	ES:DI -> 16-byte blank-padded password (optional)
Return: AH = 00h success
	    DL = handle
SeeAlso: AX=D000h

Format of LAT Session Control Block:
Offset	Size	Description	(Table 03727)
 00h 18 BYTEs	service name
 12h 18 BYTEs	node name (future use)
 24h 18 BYTEs	port name (future use)
 36h	DWORD	-> session stopped post routine
 3Ah	DWORD	-> service table overflow post routine
 3Eh	DWORD	-> transmit post routine
 42h	DWORD	-> receive post routine
 46h	WORD	session status
		04h circuit failure
		08h stop slot received
---LAT v???---
 48h	WORD	slot state (LAT driver use)
 4Ah	WORD	local credits (LAT driver use)
 4Ch	DWORD	-> VCB (LAT driver use)
 50h	WORD	backward slot (LAT driver use)
 52h	WORD	forward slot (LAT driver use)
 54h	WORD	remote slot ID (LAT driver use)
 56h	WORD	local slot ID (LAT driver use)
 58h	WORD	slot byte count (LAT driver use)
 5Ah	BYTE	remote credits (LAT driver use)
 5Bh 255 BYTEs	transmitted data slot
15Ah	BYTE	number of receive data slots (4 recommended)
15Bh	BYTE	number of occupied slots
15Ch	BYTE	index of next receive slot to use
15Dh	BYTE	index of current receive slot
15Eh	WORD	pointer to first received character
160h  N WORDs	pointers to receive slots (buffers); each is 259 bytes
     259N BYTEs	buffers
Note:	set post routines to 0000h:0000h if polled operation will be used
---LAT v4.1.17---
 48h	WORD	session state (LAT driver use)
 4Ah	BYTE	local credits (LAT driver use)
 4Bh	DWORD	-> VCB (LAT driver use)
 4Fh	WORD	backward slot (LAT driver use)
 51h	WORD	forward slot (LAT driver use)
 53h	BYTE	remote slot ID (LAT driver use)
 54h	BYTE	local slot ID (LAT driver use)
 55h	BYTE	slot byte count (LAT driver use)
 56h	BYTE	remote credits (LAT driver use)
 57h 255 BYTEs	transmitted data slot
156h	BYTE	number of receive data slots (4 recommended)
157h	BYTE	number of occupied slots
158h	BYTE	index of next receive slot to use
159h	BYTE	index of current receive slot
15Ah	WORD	pointer to first received character
15Ch  N WORDs	pointers to receive slots (buffers); each is 259 bytes
     259N BYTEs	buffers
Note:	set post routines to 0000h:0000h if polled operation will be used

INT 6A - DECnet DOS LOCAL AREA TRANSPORT - CLOSE SESSION
	AX = D000h
	DH = FFh
	DL = handle
Return: AX = status (see #03728)
SeeAlso: AH=D0h

(Table 03728)
Values for DECnet DOS LAT function status:
 0000h	successful
 0001h	no such session
 0002h	session not running, try again later

INT 6A - DECnet DOS LOCAL AREA TRANSPORT - SEND BREAK
	AX = D100h
	DH = FFh
	DL = handle
Return: AX = 0000h if successful
	AH bit 7 set if unable to send break

INT 6A - DECnet DOS LOCAL AREA TRANSPORT - RESET LAT COUNTERS
	AX = D300h
	DH = FFh
SeeAlso: AX=D400h

INT 6A - DECnet DOS LOCAL AREA TRANSPORT - COPY LAT COUNTERS
	AX = D400h
	DH = FFh
	CX = buffer size
	ES:BX -> buffer for LAT counters
Return: AX = status
	    0000h counters copied into buffer
	    FFFFh buffer too small
SeeAlso: AX=D300h

INT 6A - DECnet DOS LOCAL AREA TRANSPORT - GET NEXT LAT SERVICE NAME
	AX = D500h
	DH = FFh
	ES:BX -> 17-byte buffer for name
Return: AH = 00h if successful
	   ES:BX buffer filled
	AX = FFFFh if end of table or no name available
Notes:	use this function to get the names of the hosts on the network
	successive calls are necessary to get all names
SeeAlso: AX=D600h/DH=FFh

INT 6A - DECnet DOS LOCAL AREA TRANSPORT - LAT SERVICE TABLE RESET
	AX = D600h
	DH = FFh
Return: AX = number of service table entries
	BX = status
	    0000h service table has not overflowed
	    FFFFh service table has overflowed
SeeAlso: AX=D500h