Asus CROSSHAIR Crosshair English Edition User's Manual - Page 47
Interrupt assignments
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2.5.3 Interrupt assignments Standard interrupt assignments IRQ Priority Standard function 0 1 System Timer 1 2 Keyboard Controller 2 - Redirect to IRQ#9 5 13 IRQ Holder for PCI Steering* 6 14 Floppy Disk Controller 7 15 Nvidia nForce PCI system 8 3 System CMOS/Real Time Clock 9 4 Nvidia nForce Networking Controller 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 * These IRQs are usually available for ISA or PCI devices. IRQ assignments for this motherboard PCI Slot 1 PCI Slot 2 PCI Slot 3 Onboard 1394 PCIE x 16 1 PCIE x 16 2 PCIE x 4 A B C D shared - - - - shared - - shared shared - - - shared - - - - - - - - - - - E F G H - - - - - - - - - - - - - - - - - shared - - - - shared - ASUS Crosshair 2-21