VIA Technologies K8T800 User's Guide download pdf (Page 38)

2-16

Chapter 2: Hardware information

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.

2.5.3 Interrupt assignments

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

INT A INT B INT C INT D

PCI slot 1 shared — — —

PCI slot 2 — shared — —

PCI slot 3 — — shared —

PCI slot 4 — — — used

PCI slot 5 shared — — —

Gigabit LAN — shared — —

Onboard RAID — — shared —

Onboard 1394 shared — — —

Serial ATA — — shared —

AGP slot shared — — —

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 139 140

No comments

VIA Technologies K8T800 User's Guide Page 38