RBIL61 - Serial I/O

RBIL61 - Serial I/O

MEM 0040h:0000h - BASE I/O ADDRESS OF FIRST SERIAL I/O PORTIBM PC Portable (uses same BIOS as XT)
MEM 0040h:0002h - BASE I/O ADDRESS OF SECOND SERIAL I/O PORTIBM PC Portable (uses same BIOS as XT)
MEM 0040h:0004h - BASE I/O ADDRESS OF THIRD SERIAL I/O PORTIBM PC Portable (uses same BIOS as XT)
MEM 0040h:0006h - BASE I/O ADDRESS OF FOURTH SERIAL I/O PORTIBM PC Portable (uses same BIOS as XT)
MEM 0040h:00D0h - Digiboard MV/4 - LENGTH OF DATA TABLE
MEM 0040h:00D1h - Digiboard MV/4 - PRODUCT ID
MEM 0040h:00D2h - Digiboard MV/4 - BASE ADDRESS FOUND
MEM 0040h:00D4h - Digiboard MV/4 - PORTS
MEM 0040h:00D5h - Digiboard MV/4 - IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated.
MEM 0040h:00DAh - Digiboard MV/4 - CURRENT PORTIBM PC Portable (uses same BIOS as XT) (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. initializatn only)
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)
MEM 0040h:00DCh - Digiboard MV/4 - SLAVE 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)