AIMB-641 User Manual 90Appendix C System AssignmentsC.1 System I/O PortsTable C.1: System I/O portsAddr. range (Hex) Device000-01F DMA controller020-021 Interrupt controller 1, master040-05F 8254 timer060-06F 8042 (keyboard controller)070-07F Real-time clock, non-maskable interrupt (NMI)mask080-09F DMA page register0A0-0BF Interrupt controller 20C0-0DF DMA controller0F0 Clear math co-processor0F1 Reset math co-processor0F8-0FF Math co-processor1F0-1F8 Fixed disk200-207 Reserved (Game I/O)278-27F Reserved (Parallel port 2,LTP3)2E8-2EF Reserved (Series port 4)2F8-2FF Serial port 2300-31F Prototype card360-36F Reserved378-37F Parallel printer port 1 (LPT 2)380-38F SDLC, bisynchronous 23A0-3AF Bisynchronous 13B0-3BF Monochrome display and printer adapter (LPT1)3C0-3CF Reserved3D0-3DF Color/graphics monitor adapter3E8-3EF Reserved (Series port 3)3F0-3F7 Diskette controller3F8-3FF Serial port 1* PNP audio I/O map range from 220 ~ 250H (16 bytes)MPU-401 select from 300 ~ 330H (2 bytes)
