Standard Interrupt Assignments; Interrupt Request Table For This Motherboard - Asus CUSI-M User Manual

3. HARDWARE SETUP
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
0
1
2 N/A
3*
4*
5*
6
7*
8
9*
10*
11*
12*
13
14*
15*
*These IRQs are usually available for ISA or PCI devices.

Interrupt Request Table for this Motherboard

Interrupt requests are shared as shown by the following table:
PCI slot 1
PCI slot 2
PCI slot 3
Onboard VGA
Onboard LAN
Onboard USB controller
Onboard Audio
AMR
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.
24
Standard Function
1 System Timer
2 Keyboard Controller
Programmable Interrupt
11 Communications Port (COM2)
12 Communications Port (COM1)
13 Sound Card (sometimes LPT2)
14 Floppy Disk Controller
15 Printer Port (LPT1)
3 System CMOS/Real Time Clock
4 ACPI Mode when enabled
5 IRQ Holder for PCI Steering
6 IRQ Holder for PCI Steering
7 PS/2 Compatible Mouse Port
8 Numeric Data Processor
9 Primary IDE Channel
10 Secondary IDE Channel
INT-A
shared
—
—
shared
—
—
—
—
ASUS CUSI-M User's Manual
INT-B INT-C
— —
— —
shared —
— —
— shared
— —
— shared
shared —
INT-D
—
shared
—
—
—
shared
—
—