INT 17 - Alloy NTNX, MW386 - GET CURRENT PRINTER
        AH = 95h
        AL = mode
            00h NTNX compatibility
                Return: DX = NTNX printer number (see AH=88h)
                            (FFFFh if current printer not compatible with NTNX)
            01h MW386
                Return: DX = MW386 printer number
            02h MW386 v2+
                BX = logical device number
                    00h-03h = LPT1-LPT4
                    04h-07h = COM1-COM4
                Return: DX = MW386 printer number (FFFFh = none)
Return: AL = status (see AH=81h)
Note:   modes 00h and 01h return the printer number of logical LPT1 only