Asus Motherboard PR-DLS533 User Manual download pdf (Page 38)

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Chapter 2: Hardware information

Standard Interrupt Assignments

IRQ Priority Standard Function

0 1 System Timer

1 2 Keyboard Controller

2 N/A Programmable Interrupt

3* 11 Communications Port (COM2)

4* 12 Communications Port (COM1)

5* 13 Sound Card (sometimes LPT2)

6 14 Floppy Disk Controller

7* 15 Printer Port (LPT1)

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.

IRQ assignments for this motherboard

PCI INTA PCI INTB PCI INTC PCI INTD

PCI slot 1 1 12 13 14

PCI slot 2 4 15 16 17

PCI slot 3 5 18 19 20

PCI slot 4 8 21 22 23

PCI slot 5 9 24 6 7

PCI slot 6 10 27 28 29

Onboard 82551QM controller 2 — — —

Onboard 82544GC controller 3 — — —

Onboard SCSI controller 6 7 — —

Onboard VGA controller 30 — — —

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.

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Asus Motherboard PR-DLS533 User Manual Page 38