Int 14/AH=01h

SERIAL - WRITE CHARACTER TO PORT

AH = 01h
AL = character to write
DX = port number (00h-03h) (04h-43h for Digiboard XAPCM232.SYS)

Return:
AH bit 7 clear if successful
AH bit 7 set on error
AH bits 6-0 = port status (see #00304)

Notes: Various network and serial-port drivers support the standard BIOS functions with interrupt-driven I/O instead of the BIOS's polled I/O. The 1993/04/08 Compaq system ROM uses only the low two bits of DX

See Also: AH=02h - AH=0Bh"FOSSIL" - AX=8000h"ARTICOM" - A

Category: Serial I/O - Int 14h - S

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