APPENDIX B. INTERRUPT REQUEST (IRQ)
Peripheral devices use interrupt request lines to notify CPU for the services required. The following
table shows the IRQ used by the devices on board.
Level
HARDWARE USING THE SETTING
00 System
timer
01
Standard 101/102-Key or Microsoft Natural Keyboard
02
Programmable interrupt controller
03
Communication Port (COM2)
04
Communication Port (COM1)
05
Standard Enhanced PCI to USB Host Controller
05
Standard OpenHCD USB Host Controller
06
Standard FDD Controller
08
System CMOS realtime clock
09
Microsoft ACPI-Compliant System
10
GeodeLX Audio Driver (WDM)
12
PS/2 Compatible Mouse
13
Numeric data processor
14
Primary IDE Channel
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Summary of Contents for AR-B1572
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