User Manual

2-16
Chapter 2: Hardware Information
* These IRQs are usually available for ISA or PCI devices.
IRQ Priority Standard function
0 1 SystemTimer
1 2 KeyboardController
2 - Programmable Interrupt
3* 11 CommunicationsPort(COM2)
4* 12 CommunicationsPort(COM1)
5* 13 --
6 14 FloppyDiskController
7* 15 --
8 3 SystemCMOS/RealTimeClock
9* 4 ACPIModewhenused
10* 5 IRQHolderforPCISteering
11* 6 IRQHolder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
2.5.3 Interrupt assignments
Standard Interrupt assignments
2.5.4 PCI Express x16 slot (x16 link)
TheonboardPCIE1and3provideonex16Gen3linktoCPU1(Autoswitchtox8linkifPCIE
2 and 4 are occupied);TheonboardPCIE5and7provideonex16Gen3linktoCPU2.These
slotssupportVGAcardsandvariousserverclasshighperformanceadd-oncards.
2.5.5 PCI Express x16 slot (x8 link)
TheonboardPCIE6providesonex8Gen3linktoCPU2;TheonboardPCIE2and4provide
onex8Gen3linktoCPU1.TheseslotsupportVGACardsandvariousserverclasshigh
performance add-on cards.