INT 14 - COURIERS.COM - OUTPUT STATUS                                           
	AH = 87h
Return: AX = number of unsent characters
SeeAlso: AH=88h"COURIERS"
                                                                                

INT 14 - COMM-DRV v14.0 - TURN ON DTR                                           
	AH = 87h
	DX = port number
Return: AH bit 7 set on error
	AH bit 7 clear if successful
SeeAlso: AX=8000h"COMM-DRV",AH=88h"COMM-DRV",AH=89h"COMM-DRV"