ACP-1120 User’s Manual 116
B.24 AC-97 Audio Interface (CN43)
Table B.22: System I/O ports
1 VCC 2 GND
3 SYNC 4 BITCLK
5 SDOUT 6 SDIN
7 SDIN2 8 -ACRST
9 +12V 10 GND
B.25 System I/O Ports
Table B.23: System I/O ports
Addr. range (Hex)Device
000-01F DMA controller
020-021 Interrupt controller 1, master
022-023 Chipset address
040-05F 8254 timer
060-06F 8042 (keyboard controller)
070-07F Real-time clock, non-maskable interrupt (NMI)
mask
080-09F DMA page register
0A0-0BF Interrupt controller 2
0C0-0DF DMA controller
0F0 Clear math co-processor
0F1 Reset math co-processor
0F8-0FF Math co-processor
1F0-1F8 Fixed disk
200-207 Game I/O
278-27F Parallel printer port 2 (LPT3)
290-297 On-board hardware monitor
2F8-2FF Serial port 2
300-31F Prototype card
360-36F Reserved
7
3
2
8
1
6
910
4
5
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