Owner's manual

Appendix E. Default System Values 68
First MB Memory Map
First MB Memory Map
This table illustrates the first MB memory map.
0F0-0F0 Clear Math Coprocessor Busy
0F1-0F1 Reset Math Coprocessor
0F8-OFF Math Coprocessor
1F0-1F8 VIR BUS Master PCI IDE Controller
200-207 Game I/O
278-27F Reserved
2F8-2FF Serial Port 2
378-37F Parallel Printer Port 1
3B0-3DF Cyrix Graphic Adapter
3F0-3F7 Available
3F8-3FF Serial Port 1
443 Watch-Dog timer enable
843 Watch-Dog timer disable
I/O Address Map Description
Address Description
F000h-FFFFh System ROM
D800h-EFFFh Unused
C800h-D7FFh Ethernet ROM
C000h-C7FFh Expansion ROM
B800h-BFFFh CGA/EGA/VGA text
B000h-B7FFh Unused
A000h-AFFFh EGA/VGA graphics
0000h-9FFFh Base memory