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Chapter 2: Hardware information
Interrupt Request Table for this Motherboard
This table lists the default IRQ assignments fo rthis motherboard.
ABCDEFGH
PCI slot 1 shared ———————
PCI slot 2 — shared ——————
PCI slot 3 ——used —————
PCI slot 4 ———shared ————
PCI slot 5 ———shared ————
Onboard USB controller HC0———shared ————
Onboard USB controller HC1———————used
AGP shared ———————
Onboard Audio — shared ———used ——
Standard Interrupt Assignments
IRQ Priority Standard Function
0 1 System Timer
1 2 Keyboard Controller
2 N/A Programmable Interrupt
3* 11 Communications Port (COM2)
4* 12 Communications Port (COM1)
5* 13 Sound Card (sometimes LPT2)
6 14 Floppy Disk Controller
7* 15 Printer Port (LPT1)
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
*These IRQs are usually available for ISA or PCI devices.
IMPORTANT! When using PCI cards on shared slots, ensure that the
drivers support “Share IRQ” or that the cards do not need IRQ
assignments. Otherwise, conflicts will arise between the two PCI groups,
making the system unstable and the card inoperative.
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