INT 6A - OPTHELP.COM
Program: OPTHELP is an optionally-resident help system for SLR Systems's OPTASM
assembler
Range: INT 60h to INT 7Fh, selected by configuration
--------N-6A---------------------------------
INT 6A - DECnet DOS - LOCAL AREA TRANSPORT PROGRAM - INSTALLATION CHECK
InstallCheck: test for a signature area immediately preceding the interrupt
handler (see #03715)
SeeAlso: AH=01h/DH=FFh,INT 6B"DECnet",INT 6D"DECnet"
Index: installation check;DECnet DOS Local Area Transport
Format of DECnet DOS signature area:
Offset Size Description (Table 03715)
-5 BYTE major version number
-4 BYTE minor version number
-3 3 BYTEs signature (ASCII "LAT"
--------h-6A---------------------------------
INT 6A C - HP Vectra AT - IRQ18 - RESERVED HARDWARE INTERRUPT
SeeAlso: INT 0A"IRQ2",INT 69"HP Vectra",INT 6B"HP Vectra"
--------N-6A0000-----------------------------
INT 6A U - Super-TCP DOS TSR Kernel v3.57 - INSTALLATION CHECK
AX = 0000h
Return: AX = 4357h ('CW')
Program: Super-TCP is a TCP/IP protocol stack by Frontier Technologies Corp.
Note: an alternate installation check is to test for the ASCIZ signature
"FTC Super-TCP" three bytes past the interrupt handler
SeeAlso: AX=0001h,AX=0002h,AX=000Fh,AX=0010h,INT 21/AH=3Fh"BW-TCP"
SeeAlso: INT 61"FTP Software",INT 62/AH=00h"ETHDEV"
--------N-6A0001-----------------------------
INT 6A U - Super-TCP DOS TSR Kernel v3.57 - ???
AX = 0001h
BH = function number
01h ???
DS:SI -> ??? 24-byte record1 (see #03717)
ES
I -> buffer containing ???
02h ???
DS:SI -> ??? 18-byte record2 (see #03718)
ES
I -> buffer containing ???
04h ???
BL = subfunction
01h
DS:SI -> ??? 28-byte record3 (see #03719)
ES
I -> buffer containing ???
02h
DS:SI -> ??? 28-byte record3 (see #03719)
ES
I -> buffer containing ???
03h
DS:SI -> ??? 28-byte record3 (see #03719)
else Return: AX = 0005h
05h ???
DS:SI -> ??? 20-byte record4 (see #03720)
ES
I -> buffer containing ???
06h ???
BL = subfunction
01h
DS:SI -> ??? 40-byte record5 (see #03721)
02h
DS:SI -> ??? 20-byte record6 (see #03722)
ES
I -> ???
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
I -> ???
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
I buffer
06h 18 BYTEs ???
Format of record2:
Offset Size Description (Table 03718)
00h 4 BYTEs ???
04h WORD size of ES
I buffer
06h 12 BYTEs ???
Format of record3:
Offset Size Description (Table 03719)
00h 2 BYTEs ???
02h WORD ???
04h WORD size of ES
I 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
I 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
I 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
I buffer
06h 6 BYTEs ???
0Ch WORD (ret) ???
0Eh WORD operation??? (01h-03h)
10h 12 BYTEs ???
--------N-6A0002-----------------------------
INT 6A U - Super-TCP DOS TSR Kernel v3.57 - ???
AX = 0002h
BX = ??? (zero/nonzero)
CX = ??? identifier (see AX=0004h)
DS:SI -> 40-byte buffer for ??? or 0000h:0000h
ES
I -> buffer for ??? or 0000h:0000h
Return: AX = 0000h (successful) ???
BL = ???
BH = ???
CX = ???
DX = ???
--------N-6A0003-----------------------------
INT 6A U - Super-TCP DOS TSR Kernel v3.57 - GET ??? DATA AREA
AX = 0003h
Return: CX
X -> data area (see #03725)
Format of Super-TCP data area:
Offset Size Description (Table 03725)
00h 2 BYTEs ???
02h DWORD original INT 6A vector
06h 2 BYTEs ???
08h 96 BYTEs array of 16 6-byte ???
68h WORD number of elements of above array in use
6Ah WORD ???
???
--------N-6A0004-----------------------------
INT 6A U - Super-TCP DOS TSR Kernel v3.57 - ALLOCATE ???
AX = 0004h
CX = size in ???
Return: AX = 0000h (successful)
CX = DX = ???
SeeAlso: AX=0005h,AX=000Fh
--------N-6A0005-----------------------------
INT 6A U - Super-TCP DOS TSR Kernel v3.57 - FREE/CLOSE ???
AX = 0005h
CX = ??? identifier (from AX=0004h)
Return: AX = status (0000h successful, FFFFh failed)
SeeAlso: AX=0004h,AX=000Fh
--------N-6A000F-----------------------------
INT 6A U - Super-TCP DOS TSR Kernel v3.57 - FREE/CLOSE ALL ???
AX = 000Fh
Return: AX = 0000h (successful)
SeeAlso: AX=0000h,AX=0004h,AX=0005h
--------N-6A0010-----------------------------
INT 6A U - Super-TCP DOS TSR Kernel v3.57 - UNINSTALL
AX = 0010h
Return: AX = status
0000h successful
0002h can't uninstall, interrupt vector hooked by another program
Program: Super-TCP is a TCP/IP protocol stack by Frontier Technologies Corp.
Note: if AX is not one of the values listed here on entry, Super-TCP
returns AX=FFFEh
SeeAlso: AX=0000h
--------N-6A01--DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - SEND BYTE
AH = 01h
DH = FFh
AL = character
DL = handle
Return: AH >= 80h on error
SeeAlso: AH=02h
--------N-6A02--DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - READ BYTE
AH = 02h
DH = FFh
DL = handle
Return: AH < 80h if successful
AL = character
AH >= 80h on error
SeeAlso: AH=01h
--------N-6A03--DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - STATUS
AH = 03h
DH = FFh
DL = handle
Return: AH = status flags (see #03726)
Bitfields for DECnet DOS LAT status flags:
Bit(s) Description (Table 03726)
5 transmit buffer empty
3 session in start state
2 session not active
1 unable to queue transmit data
0 receive data available
--------N-6AD0--DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - OPEN SESSION
AH = D0h
DH = FFh
AL = password flag
FFh no password
0Fh password at ES
I
ES:BX -> LAT session control block (see #03727)
ES
I -> 16-byte blank-padded password (optional)
Return: AH = 00h success
DL = handle
SeeAlso: AX=D000h
Format of LAT Session Control Block:
Offset Size Description (Table 03727)
00h 18 BYTEs service name
12h 18 BYTEs node name (future use)
24h 18 BYTEs port name (future use)
36h DWORD -> session stopped post routine
3Ah DWORD -> service table overflow post routine
3Eh DWORD -> transmit post routine
42h DWORD -> receive post routine
46h WORD session status
04h circuit failure
08h stop slot received
---LAT v???---
48h WORD slot state (LAT driver use)
4Ah WORD local credits (LAT driver use)
4Ch DWORD -> VCB (LAT driver use)
50h WORD backward slot (LAT driver use)
52h WORD forward slot (LAT driver use)
54h WORD remote slot ID (LAT driver use)
56h WORD local slot ID (LAT driver use)
58h WORD slot byte count (LAT driver use)
5Ah BYTE remote credits (LAT driver use)
5Bh 255 BYTEs transmitted data slot
15Ah BYTE number of receive data slots (4 recommended)
15Bh BYTE number of occupied slots
15Ch BYTE index of next receive slot to use
15Dh BYTE index of current receive slot
15Eh WORD pointer to first received character
160h N WORDs pointers to receive slots (buffers); each is 259 bytes
259N BYTEs buffers
Note: set post routines to 0000h:0000h if polled operation will be used
---LAT v4.1.17---
48h WORD session state (LAT driver use)
4Ah BYTE local credits (LAT driver use)
4Bh DWORD -> VCB (LAT driver use)
4Fh WORD backward slot (LAT driver use)
51h WORD forward slot (LAT driver use)
53h BYTE remote slot ID (LAT driver use)
54h BYTE local slot ID (LAT driver use)
55h BYTE slot byte count (LAT driver use)
56h BYTE remote credits (LAT driver use)
57h 255 BYTEs transmitted data slot
156h BYTE number of receive data slots (4 recommended)
157h BYTE number of occupied slots
158h BYTE index of next receive slot to use
159h BYTE index of current receive slot
15Ah WORD pointer to first received character
15Ch N WORDs pointers to receive slots (buffers); each is 259 bytes
259N BYTEs buffers
Note: set post routines to 0000h:0000h if polled operation will be used
--------N-6AD000DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - CLOSE SESSION
AX = D000h
DH = FFh
DL = handle
Return: AX = status (see #03728)
SeeAlso: AH=D0h
(Table 03728)
Values for DECnet DOS LAT function status:
0000h successful
0001h no such session
0002h session not running, try again later
--------N-6AD100DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - SEND BREAK
AX = D100h
DH = FFh
DL = handle
Return: AX = 0000h if successful
AH bit 7 set if unable to send break
--------N-6AD300DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - RESET LAT COUNTERS
AX = D300h
DH = FFh
SeeAlso: AX=D400h
--------N-6AD400DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - COPY LAT COUNTERS
AX = D400h
DH = FFh
CX = buffer size
ES:BX -> buffer for LAT counters
Return: AX = status
0000h counters copied into buffer
FFFFh buffer too small
SeeAlso: AX=D300h
--------N-6AD500DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - GET NEXT LAT SERVICE NAME
AX = D500h
DH = FFh
ES:BX -> 17-byte buffer for name
Return: AH = 00h if successful
ES:BX buffer filled
AX = FFFFh if end of table or no name available
Notes: use this function to get the names of the hosts on the network
successive calls are necessary to get all names
SeeAlso: AX=D600h/DH=FFh
--------N-6AD600DHFF-------------------------
INT 6A - DECnet DOS LOCAL AREA TRANSPORT - LAT SERVICE TABLE RESET
AX = D600h
DH = FFh
Return: AX = number of service table entries
BX = status
0000h service table has not overflowed
FFFFh service table has overflowed
SeeAlso: AX=D500h
--------!---Section--------------------------
Interrupt List, part 17 of 18
Copyright (c) 1989-1999,2000 Ralf Brown
