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AH = 81h BX:DI -> port control block (see #00367) DX = port number
Return:
AH = line status register (see #00304) error if bit 7 set AL = modem status register (see #00305)
Program: COMM-DRV is a universal serial communications driver by Willies' Computer Software Company, which supports standard INT 14 and FOSSIL calls as well as its own interfaces
Note: AX=8001h should be called first to fill in the port control block
See Also:
AH=00h - AX=8001h - AH=82h"COMM-DRV" - AH=86h"C
Format of COMM-DRV port control block:
Offset Type Description (Table 00367)
00h WORD port IO address
02h WORD port IRQ
04h WORD baud rate
06h WORD parity
08h WORD data bits
0Ah WORD stop bits
0Ch WORD break status (0000h off)
0Eh WORD flow control protocol
10h BYTE input block
11h BYTE output block
12h WORD low threshold
14h WORD high threshold
16h WORD segment of buffer
18h WORD offset of buffer
1Ah WORD input buffer length
1Ch WORD output buffer length
1Eh BYTE auxiliary address
1Fh BYTE spare
20h 4 WORDs spares
Category:
Serial I/O
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Int 14h
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C
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