User`s manual

AIMB-742 User’s Manual 100
B.25 8-pin Alarm Board Connector (CN62)
B.26 System I/O Ports
Table B.25: 8-pin Alarm Board Connector (CN62)
Pin Signal Pin Signal
1 5VSB 5 VCC
2 GND 6 VCC3
3 GND 7 -12V
4-5V8 +12V
Table B.26: 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