PCI Interrupt Routing
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The following two tables provide information about PCI interrupt routing for the motherboard.

PCI Interrupt Routing in PIC Mode

Device Interrupt A Interrupt B Interrupt C Interrupt D
USB PCI IRQ 5      
Intel® 82540EM PCI IRQ 1      
Rage XL PCI IRQ 0      
PCI Slot 1 PCI IRQ 2 PCI IRQ 3 PCI IRQ 2 PCI IRQ 3
PCI Slot 2 PCI IRQ 4 PCI IRQ 6 PCI IRQ 4 PCI IRQ6
PCI Slot 3 PCI IRQ 7 PCI IRQ 8 PCI IRQ 7 PCI IRQ 8
PCI Slot 4 PCI IRQ 9 PCI IRQ 10 PCI IRQ 9 PCI IRQ 10
PCI Slot 5 PCI IRQ 11 PCI IRQ 12 PCI IRQ 11 PCI IRQ 12

PCI Interrupt Routing in APIC Mode

IO APIC Entry IO APIC Interrupt Source
INTIN 0 ISA IO APIC IRQ 0 / INTR
INTIN 1 ISA IO APIC IRQ 1
INTIN 2 ISA IO APIC IRQ 2 / SMI
INTIN 3 ISA IO APIC IRQ 3
INTIN 4 ISA IO APIC IRQ 4
INTIN 5 ISA IO APIC IRQ 5
INTIN 6 ISA IO APIC IRQ 6
INTIN 7 ISA IO APIC IRQ 7
INTIN 8 ISA IO APIC IRQ 8
INTIN 9 ISA IO APIC IRQ 9
INTIN 10 ISA IO APIC IRQ 10
INTIN 11 ISA IO APIC IRQ 11
INTIN 12 ISA IO APIC IRQ 12
INTIN 13 ISA IO APIC IRQ 13
INTIN 14 ISA IO APIC IRQ 14
INTIN 15 ISA IO APIC IRQ 15
INTIN 1 PCI IO APIC VGA Rage XL INTA#
INTIN 2 PCI IO APIC NIC Intel Kenai 32
INTIN 3 PCI IO APIC Slot 1 INTA# & INTC#
INTIN 4 PCI IO APIC Slot 1 INTB# & INTD#
INTIN 5 PCI IO APIC Slot 2 INTA# & INTC#
INTIN 5 PCI IO APIC Unused
INTIN 6 PCI IO APIC Slot 2 INTB# & INTD#
INTIN 7 PCI IO APIC Slot 3 INTA# & INTC#
INTIN 8 PCI IO APIC Slot 3 INTB# & INTD#
INTIN 9 PCI IO APIC Slot 4 INTA# & INTC#
INTIN 10 PCI IO APIC Slot 4 INTB# & INTD#
INTIN 11 PCI IO APIC Slot 5 INTA# & INTC#
INTIN 12 PCI IO APIC Slot 5 INTB# & INTD#
INTIN 13 PCI IO APIC  
INTIN 14 PCI IO APIC  
INTIN 15 PCI IO APIC