Pci Interrupt Routing Map - Intel D975XBX Technical Product Specification

Intel Desktop Board D975XBX Technical Product Specification
Table 14.

PCI Interrupt Routing Map

PCI Interrupt Source
PCI bus connector 1
PCI bus connector 2
IEEE-1394a controller
Discrete SATA Controller
NOTE
In PIC mode, the ICH7-R/ICH7-DH 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.
54
ICH7-R/ICH7-DH PIRQ Signal Name
PIRQA PIRQB PIRQC
INTD INTC INTA
INTA
INTA
PIRQD PIRQE PIRQF
INTD INTA
INTB
PIRQG PIRQH
INTB INTC