Int 14 Fn 81 - Couriers.com - Check If Port Busy [S]
AH = 81h
AL = port number (1-4)
Return: AH = 00h port available
01h port exists but already in use
02h port nonexistent
Program: COURIERS is a TSR utility by PC Magazine
See Also: AH=83h,AH=8Dh
This page created by ng2html v1.05, the Norton guide to HTML conversion utility.
Written by Dave Pearson