Pci Interrupt Routing Map - Intel D845PEMY Specification

Intel Desktop Board D845PEMY Technical Product Specification
Table 15.

PCI Interrupt Routing Map

PCI Interrupt Source
AGP connector
ICH4 USB UHCI controller 1 INTA
SMBus controller
ICH4 USB UHCI controller 2
AC '97 ICH4 Audio/Modem
ICH4 LAN
ICH4 USB UHCI controller 3
ICH4 USB 2.0 EHCI
controller
PCI bus connector 1
PCI bus connector 2
PCI bus connector 3
NOTE
In PIC mode, the ICH4 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 14 for the allocation of PIRQ
lines to IRQ signals in APIC mode.
36
ICH4 PIRQ Signal Name
PIRQA PIRQB PIRQC
INTA INTB
INTB
INTB
INTC
INTD INTC INTA
PIRQD PIRQE PIRQF
INTB
INTA
INTD INTA
INTC INTB
INTB
PIRQG PIRQH
INTD
INTB INTC
INTA INTD