PORTIBM PC Portable (uses same BIOS as XT) 13C6 - Compaq - VIDEO STATUS??? Note: this port is read by the Compaq MS-DOS 4.0/5.0 CHARSET utility 13C6 R? Compaq video status??? (see #P0978) Bitfields for Compaq video status???: Bit(s) Description (Table P0978) 7 ??? 6 flag 5-3 ??? 2-0 status of display??? (in the context of video mode detection on mono/color systems)