8 - English PCI bus interrupts - Selec
ting correct PCI slot
PCI bus interrupts - Selecting
correct PCI slot
Extensive information on this section is contained in the manua l "Basic information on mainboard".
To achieve optimum stability, performance and compatibility, avoid t he multiple use
of ISA IRQ s or PCI IRQ Lines (IRQ sharing). Should IRQ sharing be unavoidable,
then all involved devices and their drivers must support IR Q sharing.
Which ISA IRQs are assigned to the PCI IRQ Lines is normally autom atically
specified by the BIOS (see "BIOS Setup" description).
Monofuncti onal expansio n cards
PCI/PCI Exp ress expansion cards require a maximum of one interrupt, which is called the PCI
interrupt INT A. Expansion cards that do not require an interrupt can be installed in any desired slot.
Multifunctional expansion cards or expansion cards w ith integrated PCI-PCI bridge
These expansion cards require up to four PCI interrupts: IN T A, INT B, INT C, INT D. How many
and which of these interrupts are used is specified in the documen tatio n provided with the card.
The assignment of the PCI interrupts to the IRQ Lines is shown in the following table:
On boa rd controller
PCIINTLINE 1(A) 2(B) 3(C) 4(D) 5(E) 6(F) 7(G) 8(H)
EHCI USB 2.0
Dev 1A Fn 0
x
-------
Dev 1D Fn 0
---
x
----
SATA / AHCI
x
--
x
----
SMBus
---
x
----
Intel LAN
x
------
x
HD Audio
----
x
-
x
-
Onboard Graphik
x
-------
FireWire
-
x
------
24 Fujitsu Tech nology Solutions
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