INT 14 - COURIERS.COM - SEND SINGLE CHARACTER AH = 89h CL = character to send Return: nothing SeeAlso: AH=01h,AH=84h"COURIERS"
INT 14 - COMM-DRV v14.0 - TURN ON RTS AH = 89h DX = port number Return: AH bit 7 set on error AH bit 7 clear if successful SeeAlso: AX=8000h"COMM-DRV",AH=87h"COMM-DRV",AH=8Ah"COMM-DRV"