Fujitsu Mainboard D2974 Kurzbeschreibung - Seite 25

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PCI bus interrupts - Selecting correct PCI slot

PCI bus interrupts - Selecting

correct PCI slot

Extensive information on this section is contained in the manual "Basic information on mainboard".

To achieve optimum stability, performance and compatibility, avoid the multiple use

of ISA IRQs or PCI IRQ Lines (IRQ sharing). Should IRQ sharing be unavoidable,

then all involved devices and their drivers must support IRQ sharing.

Which ISA IRQs are assigned to the PCI IRQ Lines is normally automatically

speciﬁed by the BIOS (see "BIOS Setup" description).

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.

Multifunctional expansion cards or expansion cards with integrated PCI-PCI bridge

These expansion cards require up to four PCI interrupts: INT A, INT B, INT C, INT D. How many

and which of these interrupts are used is speciﬁed in the documentation provided with the card.

The assignment of the PCI interrupts to the IRQ Lines is shown in the following table:

Onboard controller

PCI INT LINE

1 (A)

USB 1.0

USB 2.0

SATA / AHCI

SMBus

LAN

HD Audio

OnBoard

graphic

Mechanical slot

PCI INT LINE

1 (A)

PCIe x16 Slot

PCIe x4 Slot

PCI Slot 2

PCI Slot 3

All internal components of the SB 710 have their own Interrupt Routing Register.

They are not used jointly with PCI INT A, B, C and D.

Fujitsu Technology Solutions

2 (B)

3 (C)

2 (B)

3 (C)

4 (D)

5 (E)

4 (D)

5 (E)

6 (F)

7 (G)

6 (F)

7 (G)

English - 7

8 (H)