I/O Port Address Map - AXIOMTEK SBC81203 Series User Manual

4.4

I/O Port Address Map

TM
®
The Intel Core 2 Duo, Pentium
CPUs can communicate via I/O ports. There are total 1KB port
addresses available for assignment to other devices via I/O expansion
cards.
Address
000-01F
020-03F
040-05F
060-06F
070-07F
080-09F
0A0-0BF
0F0
0C0-0DF
0F1
0F8-0FF
120
121
122
1F0-1F8
200-207
300-31F
360-36F
378-37F
3B0-3BF
3C0-3CF
3D0-3DF
3F0-3F7
3F8-3FF
2F8-2FF
Hardware Description
SBC81203 LGA775 SBC User's Manual
® ®
D, Pentium
Devices
DMA controller #1
Interrupt controller #1
Timer
Keyboard controller
Real time clock, NMI
DMA page register
Interrupt controller #2
Clear math coprocessor busy signal
DMA controller #2
Reset math coprocessor
Math processor
Disable watchdog timer operation (read)
Enable watchdog timer operation (read)
Watchdog
Fixed disk controller
Game port
Prototype card
Reserved
Parallel port #1
MDA video card (including LPT1)
EGA card
CGA card
Floppy disk controller
Serial port #1 (COM1)
Serial port #2 (COM2)
®
4 and Celeron D
25