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 2.0 x16 slots (x16 link)

The onboard PCI Express x16 slots provides x16 link to the 5400 MCH. These slots, which support the latest PCIe 2.0 device for twice the current speed and bandwidth, are designed for various server class high performance add-on cards

2.5.5PCI Express x8 slot (x8 link)

The onboard PCI Express x8 slot provides x8 link to the ESB2. These slots are designed for various server class high performance add-on cards like SCSI RAID card, fiber-channel card, etc.

PCIEx16 slot

PCI slot

PCIEx16 slot

ASUS DSEB-D16 Series

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