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Chapter 2: Hardware information
2.5.3 Interrupt assignments
Standard interrupt assignments
* 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
IRQ holder for PCI steering*
6
14
Floppy Disk Controller
7
15
Printer Port (LPT1)*
8
3
System CMOS/Real Time Clock
9
4
IRQ holder for PCI steering*
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
2.5.4 PCI/PCI-X slots
The PCI/PCI-X slots supports cards such as a LAN card, SCSI card, USB
card, and other cards that comply with PCI 2.3 and PCI-X 1.0 specifications.
The figure shows a LAN card installed on a 32-bit PCI slot and a RAID card
on a 64-bit PCI-X slot.
When you choose to install an ZCR card, install the card on the ZCR-PCI
X1 slot, which is the green slot on the KFN4-D16/SAS modem.
