PCI bus interrupts - Se lectin g corre
ct PCI slot English - 7
PCI bus interrupts - Selecting
correct PCI slot
Extensive information on this section is contained in the manual "Basic information on mainboard".
To achieve optimum sta bility, performance and compatibility, avoid the multiple use
of ISA IRQs or PCI IRQ Lines (IRQ sharing). Should IRQ sharing be unavoidable,
then all i nvolved devices and their drivers must support IRQ sharing.
Which ISA IRQs are assigned to the P CI IRQ Lines is normally automatically
specified by the BIOS (see "BIOS Setup" d escription).
Monofunctional expansion cards
PCI/PCI Express 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.
Multifunctiona l expansion cards or expa nsio n cards with integrated PCI-PCI bridge
These expansion cards require up to four PCI interrupts: INT A, INT B, INT C, INT D. How m any
and which of these interrupts are used is specified in the documentation provided with the card.
The assignment of the PCI interrupts to th e IRQ Lines is shown in the following table:
On board c ontroller
PCI INT LINE 1 (A) 2 (B) 3 (C) 4 (D) 5 (E) 6 (F) 7 (G) 8 (H)
UHCI US B 1.1
Dev 1A Fn 0
1th
----
x
---
Dev 1A Fn 1
2nd
--
x
-----
Dev 1D Fn 0
3rd
----
x
---
Dev 1D Fn 1
4th
------
x
-
Dev 1A Fn 2
5th
---
x
----
Dev 1D Fn 2
6th
-----
x
--
EHCI USB 2.0
Dev 1A Fn 7
--
x
-----
Dev 1D Fn 7
----
x
---
SATA #1
---
x
----
SATA #2
------
x
-
SMBus
------
x
-
Intel LAN
-------
x
HD Audio
----
x
---
Onboard Graphik
x
-------
Fujitsu Technology Solutions 25
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