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2-14 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
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
2.5.4 PCI Express x16 slot
This motherboard supports a PCI
Express x16 graphics card that comply
with the PCI Express specications. The
gure shows a graphics card installed on
the PCI Express x 16 slot.