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2.5.3
Interrupt assignments
Standard Interrupt assignments
IRQ
Priority
0
1
1
2
2
-
3*
11
4*
12
5*
13
6
14
7*
15
8
3
9*
4
10*
5
11*
6
12*
7
13
8
14*
9
15*
10
* These IRQs are usually available for ISA or PCI devices.
2.5.4
PCI Express x8 slot (x4 link)
The onboard PCI Express x8 slots provide one x4 link to CPU. The slots support
VGA cards and various server class high performance add-on cards.
2.5.5
PCI Express x16 slot (x16 link)
The onboard PCI Express x16 slot provides one x16 link to CPU. This slot supports
VGA cards and various server class high performance add-on cards.
2.5.6
PCI slots
The PCI slot supports cards such as a LAN card, USB card, and other cards that
comply with PCI 2.3 specifications.
2-22
Standard function
System Timer
Keyboard Controller
Programmable Interrupt
Communications Port (COM2)
Communications Port (COM1)
--
Floppy Disk Controller
--
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
Primary IDE Channel
Secondary IDE Channel
Chapter 2: Hardware information
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