User`s manual

- 54 -
Appendices
Appendix C. 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 4 Communications Port (COM1)
IRQ 3 Communications Port (COM2)
IRQ 11 Communications Port (COM3)
IRQ 5 Ethernet Controller
IRQ 5 Ethernet Controller
IRQ 5 Intel(R) ICH8 Family SMBus Controller - 283E
IRQ 4294967292 Intel(R) ICH8 Family PCI Express Root Port 1 - 283F
IRQ 10 Communications Port (COM4)
IRQ 4294967294 Intel(R) ICH8 Family PCI Express Root Port 2 - 2841
IRQ 8 System CMOS/real time clock
IRQ 4294967293 Intel(R) ICH8 Family PCI Express Root Port 3 - 2843
IRQ 13 Numeric data processor
IRQ 81 Microsoft ACPI-Compliant System
IRQ 82 Microsoft ACPI-Compliant System
IRQ 83 Microsoft ACPI-Compliant System
IRQ 84 Microsoft ACPI-Compliant System
IRQ 85 Microsoft ACPI-Compliant System
IRQ 86 Microsoft ACPI-Compliant System
IRQ 87 Microsoft ACPI-Compliant System
IRQ 88 Microsoft ACPI-Compliant System
IRQ 89 Microsoft ACPI-Compliant System
IRQ 90 Microsoft ACPI-Compliant System
IRQ 91 Microsoft ACPI-Compliant System
IRQ 92 Microsoft ACPI-Compliant System
IRQ 93 Microsoft ACPI-Compliant System
IRQ 94 Microsoft ACPI-Compliant System
IRQ 95 Microsoft ACPI-Compliant System
IRQ 96 Microsoft ACPI-Compliant System
IRQ 97 Microsoft ACPI-Compliant System