Intel BOXD955XCSLKR Product Specification - Page 50

Table 14., PCI Interrupt Routing Map

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Intel Desktop Board D955XCS Technical Product Specification Table 14. PCI Interrupt Routing Map PCI Interrupt Source IEEE-1394a/b controller PCI bus connector 1 PCI bus connector 2 PCI bus connector 3 PCI bus connector 4 PIRQA PIRQB INTD INTC ICH7-R PIRQ Signal Name PIRQC PIRQD PIRQE PIRQF INTA INTD INTA INTC INTB INTA INTB INTB INTA INTC PIRQG INTB INTA INTD PIRQH INTC INTD NOTE In PIC mode, the ICH7-R can connect each PIRQ line internally to one of the IRQ signals (3, 4, 5, 6, 7, 9, 10, 11, 12, 14, and 15). Typically, a device that does not share a PIRQ line will have a unique interrupt. However, in certain interrupt-constrained situations, it is possible for two or more of the PIRQ lines to be connected to the same IRQ signal. Refer to Table 13 for the allocation of PIRQ lines to IRQ signals in APIC mode. PCI interrupt assignments to the USB ports, Serial ATA ports, and PCI Express ports are dynamic. 50

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Intel Desktop Board D955XCS Technical Product Specification
50
Table 14.
PCI Interrupt Routing Map
ICH7-R PIRQ Signal Name
PCI Interrupt Source
PIRQA
PIRQB
PIRQC
PIRQD
PIRQE
PIRQF
PIRQG
PIRQH
IEEE-1394a/b controller
INTA
PCI bus connector 1
INTD
INTA
INTB
INTC
PCI bus connector 2
INTC
INTB
INTA
INTD
PCI bus connector 3
INTD
INTC
INTA
INTB
PCI bus connector 4
INTB
INTA
INTC
INTD
±
NOTE
In PIC mode, the ICH7-R can connect each PIRQ line internally to one of the IRQ signals (3, 4, 5,
6, 7, 9, 10, 11, 12, 14, and 15).
Typically, a device that does not share a PIRQ line will have a
unique interrupt.
However, in certain interrupt-constrained situations, it is possible for two or
more of the PIRQ lines to be connected to the same IRQ signal.
Refer to Table 13 for the
allocation of PIRQ lines to IRQ signals in APIC mode.
PCI interrupt assignments to the USB ports, Serial ATA ports, and PCI Express ports are dynamic.