INT 14 - COMM-DRV v14.0 - PORT CLEANUP AH = 82h DX = port number Return: AH bit 7 set on error AH bit 7 clear if successful Desc: reset the port to its state before the AH=81h initialization and unhook any interrupts used by the port SeeAlso: AH=81h"COMM-DRV",AH=83h"COMM-DRV"