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AX = 8000h DX = port number
Return:
AX = code for last error (see #00357) BX = number of characters in output buffer CX = nubmer of characters in input buffer DX = state flag (see #00358)
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
See Also: AX=8001h"COMM-DRV" - AX=8002h"COMM-DRV" - AX=8003h"COMM-DRV"
(Table 00357) Values for COMM-DRV error code: 00h no error 01h buffer not set or attempted to change buffer for active port 02h port not active 03h transmit buffer full 04h receive buffer full 05h syntax error 06h invalid buffer size 07h invalid port 08h handler changed 09h invalid baud rate 0Ah invalid parity setting 0Bh invalid data length 0Ch invalid number of stop bits 0Dh invalid protocol number 0Eh IRQ changed 0Fh port changged 10h invalid threshold setting 11h invalid IRQ number 12h interrupts not enabled 13h invalid break syntax 14h fatal error 15h CTS error 16h invalid RS232 I/O port address 17h environment variable not set 18h error on IOCTL call 19h error during atexit cleanup 1Ah error mapping for direct calls 1Bh error opening device 1Ch unable to allocate memory 1Dh error on external micro card 1Eh card changed error 1Fh card type error 20h not supported 21h parent port error 22h card command buffer full 23h no subdevice for this port 24h unknown error 25h external card busy 26h no more timers available 27h INT 14 vector changed 28h INT 08 vector changed 29h DPMI error 2Ah TSR buffer too small (or nonexistent) 2Bh out of asynchronous resources 2Ch out of timer resources 2Dh out of "other" timer resources 2Eh file I/O error 2Fh hardware memory > 64K
Bitfields for state flag : Bit(s) Description (Table 00358) 0 port is active 1 output throttled (XOFF received, or DSR or CTS reset) 2 input throttled (XOFF sent, or DTR or RTS reset)
Category: Serial I/O - Int 14h - C
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