User's Manual

I/O Address Map
The I/O address map of your mainboard is given below. Note that the
I/O addresses from hex 000 to hex OFF are reserved for the mainboard,
and the addresses from hex 100 to hex 3FF are available
on the AT I/O
bus.
Address Range
000-01 F
020-03F
040-05F
060-06F
070-07F
080-09F
0A0-0BF
0C0-0DF
0F0
0F1
0F&0FF
1 F0-1F8
200-207
278-27F
2F8-2FF
300-31 F
360-36F
378-37F
380-38F
3A0-3AF
3B0-3BF
3C0-3CF
3D0-3DF
3F0-3F7
3F8-3FF
Device
DMA Controller 1, 8237
Master Interrupt Controller, 8259
Timer, 8254
Keyboard Controller, 8042
Real-time clock, NMI mask
DMA Page Register,74LS612
Interrupt Controller2, 8259
DMA Controller 2, 8237
Clear Math Coprocessor Busy
Reset Math Coprocessor
Math Coprocessor
Fixed Disk
Game I/O
Parallel Printer Port 2
Serial Port 2
Prototype Card
Reserved
Parallel Printer Port 1
SDLC, bisynchronous 2
Bisynchronous 1
Monochrome Display and Printer Adapter
Enhanced Graphics Display Adapter
Color Graphics Monitor Adapter
Diskette Controller
Serial Port 1
Table 6-11: I/0 Address Map
Chapter 6: Appendix
41