INT 17 - NorthNet Jetstream API - PRINT DATA BUFFER FROM EXTENDED MEMORY

	AH = F5h
	CX = data buffer length
	DX = printer port (0-3)
	DS:SI -> data buffer (32-bit physical address)
Return: AX = status
	    0000h printer not ready (see also AH=02h)
	    other printing started
SeeAlso: AH=F1h