2.5.3Interrupt assignments

Standard Interrupt assignments

IRQ

Priority

Standard function

0

1

System Timer

 

 

 

1

2

Keyboard Controller

 

 

 

2

-

Programmable Interrupt

 

 

 

3*

11

Communications Port (COM2)

 

 

 

4*

12

Communications Port (COM1)

 

 

 

5*

13

--

 

 

 

6

14

Floppy Disk Controller

 

 

 

7*

15

--

 

 

 

8

3

System CMOS/Real Time Clock

 

 

 

9*

4

ACPI Mode when used

 

 

 

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.

2.5.4PCI Express x16 slot (x16 link)

The onboard PCIE6 slot provides one x16 Gen3 link and auto switches to x8 link if PCIE5 is occupied. This slot supports VGA cards and various server class high performance add-on cards.

2.5.5PCI Express x8 slot (x8 link)

The onboard PCIE 4 and PCIE 5 provide one x8 Gen3 link. These slots support VGA cards and various server class high performance add-on cards.

2.5.6PCI Express x1 slot (x1 link)

The onboard PCIE 3 and PCIE 7 provide one x1 Gen2 link to the Intel® C224 PCH.

2.5.7PCI slot

The PCI 1 and PCI 2 slots supports cards such as LAN, USB, and other cards that complies with PCI specifications.

ASUS P9D-E/4L

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