IMB202 LGA775 ATX Board User’s Manual
Hardware Description
28
4.4 I/O Port Address Map
The Intel
®
Core
TM
2 Quad, Core
TM
2 Duo and Celeron
®
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
Devices
000-01F
DMA controller #1
020-03F
Interrupt controller #1
040-05F Timer
060-06F Keyboard
controller
070-07F
Real time clock, NMI
080-09F
DMA page register
0A0-0BF
Interrupt controller #2
0F0
Clear math coprocessor busy signal
0C0-0DF
DMA controller #2
0F1
Reset math coprocessor
0F8-0FF Math
processor
120
Disable watchdog timer operation (read)
121
Enable watchdog timer operation (read)
122 Watchdog
1F0-1F8
Fixed disk controller
200-207 Game
port
300-31F Prototype
card
360-36F Reserved
378-37F
Parallel port #1
3B0-3BF
MDA video card (including LPT1)
3C0-3CF EGA
card
3D0-3DF CGA
card
3F0-3F7
Floppy disk controller
3F8-3FF
Serial port #1 (COM1)
2F8-2FF
Serial port #2 (COM2)
Содержание IMB202 Series
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