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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 slot (x16 link)
The onboard PCIE6 slot provides one x16 Gen3 link to CPU1. This slot supports
VGA cards and various server class high performance add-on cards.
2.5.5
PCI Express x8 slot (x8 link)
The onboard PCIE 3, 4, 5, and 7 slots provide one x8 Gen3 link to CPU2. These
slots support VGA Cards and various server class high performance add-on cards.
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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