FWA5104 Series User
’s Manual
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 3
Communications Port (COM2)
IRQ 4
Communications Port (COM1)
IRQ 8
High precision event timer
IRQ 13
Numeric data processor
IRQ 18
Standard Enhanced PCI to USB Host
Controller
IRQ 18
Standard Enhanced PCI to USB Host
Controller
IRQ 19
AMD SATA Controller
IRQ81
Microsoft ACPI-Compliant System
IRQ82
Microsoft ACPI-Compliant System
IRQ83
Microsoft ACPI-Compliant System
IRQ84
Microsoft ACPI-Compliant System