Chapter 1: Product Introduction
1-14
IRQ
Priority
Standard Function
0
1
System Timer
1
2
Keyboard Controller
2
N/A
Programmable Interrupt
3*
11
IRQ holder for PCI steering
4*
12
Communications Port (COM1)
5*
13
IRQ holder for PCI steering
6
14
Floppy Disk Controller
7*
15
Printer Port (LPT1)
8
3
System CMOS/Real Time Clock
9*
4
IRQ holer for PCI steering
10*
5
IRQ holer for PCI steering
11*
6
IRQ holer 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
1.8.1 Standard interrupt assignments
*
﹛
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.
1.8.2 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
Internal USB 2.0 controller
shared
shared
shared
shared
10/100 LAN
-
shared
-
-
AGP slot
shared
-
-
-
