2.5.3Interrupt assignments

IRQ

Priority Standard function

01 System timer

12 Keyboard controller

2– Re-direct to IRQ#9

311 IRQ holder for PCI steering*

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*

105 IRQ holder for PCI steering*

116 IRQ holder for PCI steering*

127 PS/2 compatible mouse port*

138 Numeric data processor

149 SATA Primary IDE (legacy mode)

1510 SATA Secondary IDE (legacy mode)

*These IRQs are usually available for PCI devices.

IRQ assignments for this motherboard

 

A

B

C

D

E

F

G

H

PCI slot 1

shared

–

–

–

–

–

–

–

PCI slot 2

–

shared

–

–

–

–

–

–

 

PCI slot 3

–

–

shared

–

–

–

–

–

 

LAN (L1E)

–

–

shared

–

–

–

–

–

 

SATA (5723)

shared

–

–

–

–

–

–

–

 

PCIe x16_1

shared

–

–

–

–

–

–

–

 

PCIe x1_1

shared

–

–

–

–

–

–

–

 

PCIe x1_2

–

–

shared

–

–

–

–

–

 

USB controller 1

–

–

–

–

–

–

–

shared

 

USB controller 2

–

–

–

shared

–

–

–

–

 

USB controller 3

–

–

shared

–

–

–

–

–

 

USB controller 4

shared

–

–

–

–

–

–

–

 

USB controller 5

–

–

–

–

–

shared

–

–

 

USB controller 6

–

–

shared

–

–

–

–

–

 

USB 2.0 controller 1

–

–

–

–

–

–

–

shared

 

USB 2.0 controller 2

–

–

shared

–

–

–

–

–

 

SATA controller 1

–

–

–

shared

–

–

–

–

 

SATA controller 2

–

–

–

–

–

–

shared

–

 

2-18

Chapter 2: Hardware information