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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 x16 slots (x8 link)
The onboard PCI Express x16 slots provide one x8 link that supports VGA cards and various
server class high performance add-on cards.
2.5.5
PCI Express x8 slots (x4 link)
The onboard PCI-E slot 5 provide one x4 Gen3 link to CPU1. This slot supports various
server class high performance add-on cards.
2.5.6
PCI Express x1 slots (x1 link)
The onboard PCI Express x1 slots provide one x1 link.
2.5.7
PCI slots
The PCI slot supports cards such as a LAN card, USB card, and other cards that comply with
PCI 2.3 specifications.
2-18
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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