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APPENDIX
IB903F User’s Manual
49
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
IRQ 0
System timer
IRQ 1
Standard 101/102-Key
IRQ 3
Communications Port (COM2)
IRQ 4
Communications Port (COM1)
IRQ 6
Communications Port (COM3)
IRQ 6
Communications Port (COM4)
IRQ 8
System CMOS/real time clock
IRQ 12
PS/2 Compatible Mouse
IRQ 13
Numeric data processor
IRQ 16
High Definition Audio Controller
IRQ 16
PCI standard PCI-to-PCI bridge
IRQ 17
Standard Enhanced PCI to USB Host Controller
IRQ 17
Standard Enhanced PCI to USB Host Controller
IRQ 18
High Definition Audio Controller
IRQ 18
Standard Open HCD USB Host Controller
IRQ 18
Standard Open HCD USB Host Controller
IRQ 18
Standard Open HCD USB Host Controller
IRQ 18
Standard Open HCD USB Host Controller
IRQ 19
PCI standard PCI-to-PCI bridge
IRQ 19
AMD SATA Controller (IDE Mode)
Summary of Contents for IB903F
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