2-18 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 – Redirect to IRQ#9
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
IRQ assignments for this motherboard
A B C D E F G H
PCI 1 – shared – – – – – –
PCI 2 – – shared – – – – –
Onboard 1394 shared – – – – – – –
PCIE x16_1 shared – – – – – – –
PCIE x16_2 – – – – – shared – –
PCIE x 1_1 – – – – – – shared –
PCIE x 1_2 – – – – shared – – –
2.5.4 PCI slots
The PCI slots support cards such as a LAN card, SCSI card, USB card, and other
cards that comply with PCI specications. Refer to the gure on the next page for
the location of the slots.
2.5.5 PCI Express x1 slots
This motherboard supports PCI Express x1 network cards, SCSI cards and other
cards that comply with the PCI Express specications. Refer to the gure on the
next page for the location of the slots.
