MEM 0040h:00DBh - Digiboard MV/4 - MASTER 8259 MASK (used by VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers. init only) Size: BYTE SeeAlso: MEM 0040h:00DCh"Digiboard"