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2-172-17

2-17

2.5.32.5.3

2.5.3

Interrupt assignmentsInterrupt assignments

Interrupt assignments

Standard interrupt assignmentsStandard interrupt assignments

Standard interrupt assignments

IRQIRQ

IRQ

PriorityPriority

Priority

Standard FunctionStandard Function

Standard Function

01 System Timer

12 Keyboard Controller

2• Re-direct to IRQ#9

311 Communications Port (COM2)*

412 Communications Port (COM1)*

513 IRQ holder for PCI steering*

614 Floppy Disk Controller

715 Printer Port (LPT1)*

83 System CMOS/Real Time Clock

94 IRQ holder for PCI steering*

10 5 IRQ holder for PCI steering*

11 6 IRQ holder for PCI steering*

12 7 PS/2 Compatible Mouse Port*

13 8 Numeric Data Processor

14 9 Primary IDE Channel

15 10 Secondary IDE Channel

* These IRQs are usually available for ISA or PCI devices.

IRQ assignments for this motherboardIRQ assignments for this motherboard

IRQ assignments for this motherboard

PCI slot 2 — — — — shared shared shared shared

PCI slot 3 shared shared shared shared ————

PCI E x1 slot 1 — — shared — ————

PCI E x1 slot 2 shared — — — ————

PCI E x1 slot 3 — — — shared ————

PCI E x16 slot shared — — — ————

Onboard USB controller 1 — — — — — — — shared

Onboard USB controller 2 — — — shared ————

Onboard USB controller 3 — — shared — ————

Onboard USB controller 4 shared — — — ————

Onboard USB 2.0 controller — — — — — — — shared

Onboard LAN1 — shared — — ————

Onboard LAN2 shared — — — ————

Onboard Azalia audio shared — — — ————

Onboard PCI SATA RAID (SI) — — — — — — shared —

Onboard PCI IDE RAID (ITE) —— —————shared

Onboard wireless LAN — — — — shared — — —

Onboard PCI 1394b — — — — — shared — —

When using PCI cards on shared slots, ensure that the drivers support

“Share IRQ” or that the cards do not need IRQ assignments. Otherwise,

conflicts will arise between the two PCI groups, making the system

unstable and the card inoperable.