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2.5.3
Interrupt assignments
Standard Interrupt assignments
IRQ
Priority
0
1
1
2
2
-
3*
4*
12
5*
13
6
7*
15
8
3
9*
4
10*
5
11*
6
12*
7
13
8
14*
15*
* These IRQs are usually available for ISA or PCI devices.
KNPA-U16
Standard function
System Timer
Keyboard Controller
Programmable Interrupt
Communications Port (COM1)
--
--
System CMOS/Real Time Clock
ACPI Mode when used
IRQ Holder for PCI Steering
IRQ Holder for PCI Steering
PS/2 Compatible Mouse Port
Numeric Data Processor
2-13
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