Assigning Irq For Expansion Card - AMD Geode LX800 User Manual

5. Replace the computer system's cover.
6. Set up the BIOS if necessary.
7. Install the necessary software driver for your expansion card.
2-5-2 Assigning IRQs For Expansion Card
Some expansion cards need an IRQ to operate. Generally, an IRQ must exclusively assign
to one use. In a standard design, there are 16 IRQs available but most of them are already in
use.
Standard Interrupt Assignments
IRQ
0
1
2
3 *
4 *
5 *
6 *
7 *
8
9 *
10 *
11 *
12 *
13
14 *
15 *
* These IRQs are usually available for ISA or PCI devices.
Priority
N/A System Timer
N/A Keyboard Controller
N/A Programmable Interrupt
8 Communications Port (COM2)
9 Communications Port (COM1)
6 Sound Card (sometimes LPT2)
11 Floppy Disk Controller
7 Printer Port (LPT1)
N/A System CMOS/Real Time Clock
10 ACPI Mode when enabled
3 IRQ Holder for PCI Steering
2 IRQ Holder for PCI Steering
4 PS/2 Compatible Mouse Port
N/A Numeric Data Processor
5 Primary IDE Channel
1 Secondary IDE Channel
Standard function
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