3 interrupt assignments, Standard interrupt assignments, Irq assignments for this motherboard – Asus AW171 User Manual
Page 36: 16 chapter 2: hardware information
2-16
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.
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
IRQ assignments for this motherboard
PCI INT A
PCI INT B
PCI INT C
PCI INT D
PCI slot 1
INT A
INT B
INT C
INT D
PCI slot 2
INT B
INT C
INT D
INT A
PCI slot 3
INT C
INT D
INT A
INTB
PCI slot 4
INT D
INT A
INT B
INT C
PCI slot 5
INT A
INT B
INT C
INT D
AGP slot
INT E
INT D
—
—
Onboard RAID
INT C
—
—
—
Onboard 1394
INT D
—
—
—