User's Manual

42
Appendix C Address Mapping
IO Address Map
I/O address Range Description
000-01F DMA Controller #1
020-021 Interrupt Controller #1, Master
02E-02F Super I/O
040-05F 8254 timer
04E-04F Super I/O
060-06F 8042 (Keyboard Controller)
070-07F Real time Clock, NMI Mask
080-09F DMA Page Register
0A0-0BF Interrupt Controller #2
0C0-0DF DMA Controller #2
0F0 Clear Math Coprocessor Busy
0F1 Reset Math Coprocessor
0F2 Core logic programming configuration
0F8-0FF Math Coprocessor
1F0-1F8 Fixed Disk
295-296 Hardware Monitor
2E8-2EF Serial Port 4
2F8-2FF Serial Port 2
300-31F Prototype Card
360-36F Reserved
378-37F Parallel Printer Port 1 (LPT2)
3B0-3BF Monochrome Display and Printer Adapter
(LPT1)
3C0-3CF Reserved
3D0-3DF Color/Graphics Monitor Adapter
3E8-3EF Serial Port 3
3F0-3F7 Diskette Controller
3F8-3FF Serial Port 1
1st MB Memory Address Map
Memory address Description
00000-9FFFF System memory
A0000-BFFFF VGA buffer
C0000-C7FFF VGA BIOS
F0000-FFFFF System BIOS
1000000- Extend BIOS