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Int 14 Fn 04 - Connection Manager - Open Communication [N]
AH = 04h
DX = FFFFh
ES:DI -> Connection Request protocol vector (see below)
Return: AH = return code
00h successful
AL = connection ID
BH = connection type
00h direct connection or no dialing
01h Connection Server dialed phone
01h no response from Connection Server
03h invalid request
Program: Connection Manager by Softwarehouse Corp. permits the sharing of
serial ports over an IPX or NetBIOS-based network
Desc: initiate a connection to the Connection Server listed in the current
Client parameter set
Notes: if DX is 0-3 on entry, Connection Manager emulates the standard BIOS
function, but redirects the port over the network; if DX is any other
value, the call is chained
all subvectors of the Connection Request vector are optional; if
missing, default values are provided by the default connection
parameter set
See Also: AH=00h/DX=FFFFh,AH=05h/DX=FFFFh,AH=06h/DX=FFFFh,AH=07h/DX=FFFFh
See Also: AH=0Ah/DX=FFFFh,AH=0Ch/DX=FFFFh
Format of protocol command vector:
Offset Size Description
00h WORD (big-endian) total length of command (including this word)
02h WORD (big-endian) command code
EF01h Connection Request
EF06h Modify Connection Parameters
04h N BYTEs list of subvectors (see below)
allowable subvector types are 01h-04h,17h,18h for command code
EF01h; 03h,04h for command code EF06h
Values for subvector type code:
01h Connection ID
02h Destination ID
03h Asynchronous line parameters
04h Data transfer parameters
09h Line speed
0Ah Serial coding
0Bh Packet size
0Ch Timers
0Dh Special characters
0Eh Target ID
0Fh Telephone number
10h ASCII destination ID
11h Parity
12h Bits per character
13h Number of stop bits
14h Packet timer
15h Intercharacter timer
17h Flags
18h Parameter ranges
19h Flow control
Format of subvector:
Offset Size Description
00h BYTE length of subvector
01h BYTE type code (see above)
02h N-2 BYTEs data, which may include subvectors
Format of Connection ID subvector:
Offset Size Description
00h BYTE 03h (length)
01h BYTE 01h (subvector "Connection ID")
02h BYTE connection ID
Format of Destination ID subvector:
Offset Size Description
00h BYTE length
01h BYTE 02h (subvector "Destination ID")
02h N BYTEs subvector(s) of type 0Eh, 0Fh, or 10h
Format of Asynchronous line parameters subvector:
Offset Size Description
00h BYTE length
01h BYTE 03h (subvector "Asynchronous line parameters")
02h N BYTEs subvector(s) of type 09h, 0Ah, or 19h
Format of Data transfer parameters subvector:
Offset Size Description
00h BYTE length
01h BYTE 04h (subvector "Data transfer parameters")
02h N BYTEs subvector(s) of type 0Bh, 0Ch, or 0Dh
Format of Line speed subvector:
Offset Size Description
00h BYTE 04h (length)
01h BYTE 09h (subvector "Line speed")
02h WORD bit map, highest set bit selects speed
bit 0: 2400
bits 1-7: 1800, 1200, 600, 300, 115200, 150, 110 bps
bits 8-15: 57600, 38400, 19200, 14400, 9600, 7200, 4800, 3600
Format of Serial coding subvector:
Offset Size Description
00h BYTE length
01h BYTE 0Ah (subvector "Serial coding")
02h N BYTEs subvector(s) of type 11h, 12h, or 13h
Format of Packet size subvector:
Offset Size Description
00h BYTE 04h (length)
01h BYTE 0Bh (subvector "Packet size")
02h WORD (big-endian) packet size, 1 to 1024
Format of Timers subvector:
Offset Size Description
00h BYTE length
01h BYTE 0Ch (subvector "Timers")
02h 8 BYTEs subvector of type 14h or 15h
Format of Special characters subvector:
Offset Size Description
00h BYTE length
01h BYTE 0Dh (subvector "Special characters")
02h N BYTEs list of ASCII characters to be used as EOM or EOB
Format of Target ID:
Offset Size Description
00h BYTE length
01h BYTE 0Eh (subvector "Target ID")
02h N BYTEs target ID, 1-16 bytes
Format of Telephone number subvector:
Offset Size Description
00h BYTE length
01h BYTE 0Fh (subvector "Telephone number")
02h N BYTEs telephone number
Format of ASCII destination ID subvector:
Offset Size Description
00h BYTE length
01h BYTE 10h (subvector "ASCII destination ID")
02h N BYTEs destination ID
Format of Parity subvector:
Offset Size Description
00h BYTE 03h (length)
01h BYTE 11h (subvector "Parity")
02h BYTE parity type
bit 7: odd
bit 6: even
bit 5: mark
bit 4: space
bit 3: none
Format of Bits per character subvector:
Offset Size Description
00h BYTE 03h (length)
01h BYTE 12h (subvector "Bits per character")
02h BYTE bits per character
bit 7: seven
bit 6: eight
Format of Number of stop bits subvector:
Offset Size Description
00h BYTE 03h (length)
01h BYTE 13h (subvector "Number of stop bits")
02h BYTE stop bits
bit 7: one
bit 6: 1.5
bit 5: two
Format of Packet timer and Intercharacter timer subvectors:
Offset Size Description
00h BYTE 04h (length)
01h BYTE subvector type
14h Packet timer
15h Intercharacter timer
02h WORD (big-endian) unit of value representing 20ms
Format of Flags subvector:
Offset Size Description
00h BYTE 03h (length)
01h BYTE 17h (subvector "Flags")
02h BYTE flags
bit 7: queueing requested
Format of Parameter ranges subvector:
Offset Size Description
00h BYTE length
01h BYTE 18h (subvector "Parameter ranges")
02h N BYTEs subvector(s) of type 09h, 11h, 12h, or 13h
Format of Flow control subvector:
Offset Size Description
00h BYTE length (02h-04h)
01h BYTE 19h (subvector "Flow control")
02h BYTE XOFF character
03h BYTE XON character
Note: if length is 02h, flow control is disabled; if length is 03h, any
character will be accepted as XON after an XOFF
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