INT 17 - NorthNet Jetstream API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running.  Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes. - PRINT DATA BUFFER
	AH = F1h
	CX = data buffer length
	DX = printer port (0-3)
	DS:SI -> data buffer
Return: AX = status
	    0000h printer not ready (see also AH=02h)
	    other printing started
SeeAlso: AH=00h,AH=F2h,AH=F3h,AH=F5h