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Appendix B. I/O Address Map
B.1 System I/O Address Map
I/O Address Map
Description
000-00F
DMA controller #1
020-021
Interrupt controller # 1, master
022-023
Chipset address
040-043
System timer
060-060
Standard 101/102 keyboard controller
061-061
System speaker
064-064
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
1F0-1F7
BUS master PCI IDE controller
240/260/280
Digital I/O
278-27F
Reserved
2F8-2FF
Serial Port 2
378-37F
Parallel Printer Port 1
3B0-3DF
Cyrix Graphic Adapter
3F0-3F7
Floppy Disk Controller
3F8-3FF
Serial Port 1
443
Watch dog timer enable
043/843
Watch dog timer disable
Digital I/O address could be set to 240H,260H or 280H
Summary of Contents for WAFER-5823
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