D865GSA Datasheet, PDF (52/94 Pages) Intel Corporation – Technical Product Specification

Intel Desktop Board D865GSA Technical Product Specification
Table 20. PCI Interrupt Routing Map
PCI Interrupt Source
SMBus controller
ICH5 PIRQ Signal Name
PIRQA PIRQB PIRQC PIRQD
INTB
PIRQE
PIRQF
PIRQG
PIRQH
AC ’97 ICH5 Audio
INTB
ICH5 LAN
INTA
PCI bus connector 1
INTD INTA INTB INTC
PCI bus connector 2
INTC INTB INTA INTD
PCI bus connector 3
INTD INTA INTB INTC
NOTE
In PIC mode, the ICH5 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 18 for the allocation of PIRQ lines to IRQ signals in APIC
mode.
PCI interrupt assignments to USB ports and Serial ATA ports are dynamic.
2.7 Connectors
CAUTION
Only the following connectors have overcurrent protection: Back panel and front panel
USB, PS/2, and VGA.
The other internal connectors are not overcurrent protected and should connect only to
devices inside the computer’s chassis, such as fans and internal peripherals. Do not
use these connectors to power devices external to the computer’s chassis. A fault in
the load presented by the external devices could cause damage to the computer, the
power cable, and the external devices themselves.
This section describes the board’s connectors. The connectors can be divided into
these groups:
• Back panel I/O connectors (see page 53)
• Component-side connectors (see page 54)
52