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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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