Asus P5W User Manual - Page 49
Interrupt assignments
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2.5.3 Interrupt assignments IRQ Priority Standard function 0 1 System Timer 1 2 Keyboard Controller 2 - Redirect to IRQ#9 3 11 IRQ Holder for PCI Steering* 4 12 Communications Port (COM1)* 5 13 IRQ Holder for PCI Steering* 6 14 Floppy Disk Controller 7 15 Printer Port (LPT1)* 8 6 System CMOS/Real Time Clock 9 4 IRQ Holder for PCI Steering* 10 5 IRQ Holder for PCI Steering* 11 6 IRQ Holder for PCI Steering* 12 7 PS/2 Compatible Mouse Port* 13 8 Numeric Data Processor 14 9 Primary IDE Channel 15 10 Secondary IDE Channel * These IRQs are usually available for ISA or PCI devices. IRQ assignments for this motherboard A B C D E F G H PCI slot 1 - - - - shared - - PCI slot 2 - - - - - - shared - PCI slot 3 - - - - - - - shared Onboard IDE (JMicron®) - shared - - - - - - Onboard 1394 - - - - - shared - - Onboard LAN1 - - - shared - - - - Onboard LAN2 shared - - - - - - - PCIE x16 1 shared - - - - - - - PCIE x16 2 shared - - - - - - - PCIE x1 shared - - - - - - - PCIE x1 - - shared - - - - - USB controller 1 - - - - shared - - - USB controller 2 - shared - - - - - - USB controller 3 - - shared - - - - - USB controller 4 - - - shared - - - - USB 2.0 controller - - - - shared - - - Serial ATA - - - - - - - shared IDE - - - - - - shared - HD Audio - - - shared - - - - ASUS P5W 2-23