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Appendix B: I/O Address Map
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I/O Address Map
I/O Address Map
Description
000-01F
DMA Controller #1
020-021
Interrupt Controller # 1, Master
040-05F System
Timer
060-06F
Standard 101/102 keyboard Controller
070-07F
Real time Clock, NMI Controller
080-0BF
DMA Page Register
0A0-0BF
Interrupt Controller # 2
0C0-0DF
DMA Controller # 2
0F0-0F0
Clear Math Coprocessor Busy
0F1-0F1
Reset Math Coprocessor
0F8-OFF Math
Coprocessor
170-1F7
BUS Master PCI IDE Controller
278-27F
Parallel Printer Port 2
2E8-2EF
Serial Port 4
2F8-2FF
Serial Port 2
376-376
BUS Master PCI IDE Controller
378-37F
Parallel Printer Port 1
3B0-3DF
Intel 82845G/GV/GL Graphic Controller
3E8-3EF
Serial Port 3
3F0-3F7
Floppy Disk Controller
3F8-3FF
Serial Port 1
480-48F
PCI BUS
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1st MB Memory Address Map
Memory address
Description
00000-9FFFF
SYSTEM MEMORY
A0000-BFFFF VGA
BUFFER
C0000-CFFFF VGA
BIOS
E0000-FFFFF SYSTEM
BIOS
100000 EXTEND
MEMORY
