Manual

ASUS CUA User’s Manual

3. HARDWARE SETUP

3. H/W SETUP

Expansion Cards

Interrupt Request Table for this Motherboard

Interrupt requests are shared as shown by the following table:

INT-A INT-B INT-C INT-D

PCI slot 1 shared ———

PCI slot 2 — shared ——

PCI slot 3 —— shared —

PCI slot 4 —— — shared

PCI slot 5 —— — shared

PCI slot 6 —— shared —

Onboard VGA shared ———

The following table lists the default IRQ assignments for standard PC devices. Use

this table when configuring your system and for resolving IRQ conflicts.

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

6 14 Floppy Disk Controller

7* 15 Printer Port (LPT1)

8 3 System CMOS/Real Time Clock

9* 4 ACPI Mode when enabled

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.

IMPORTANT: If using PCI cards on shared slots, make sure that the drivers sup-

port “Share IRQ” or that the cards do not need IRQ assignments. Conflicts will arise

between the two PCI groups that will make the system unstable or cards inoperable.