Int 14/AH=21h

AH = 21h
AL = char to send
DX = port number
SI = timeout in timer ticks (0000h = default)

Return:
After character is sent or timeout expires

Program: PC-MOS/386 v5.01 is a multitasking, multiuser MS-DOS 5.0-compatible operating system by The Software Link, Inc.

See Also: AH=01h - AH=0Eh"Digiboard" - AH=22h"PC-MOS"

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