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APPENDIX
IB908F
User’s Manual
69
B. Interrupt Request Lines (IRQ)
Peripheral devices use interrupt request lines to notify CPU for the
service required. The following table shows the IRQ used by the devices
on board.
Level
Function
IRQ0
System Timer Output
IRQ1
Keyboard
IRQ3
Serial Port #2
IRQ4
Serial Port #1
IRQ8
Real Time Clock
IRQ10
SMBus Controller
IRQ19
SATA AHCI Controller
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