BIOS Setup
· 38 ·
EC3-1813CLD2NA(CHENGDU)
which is assigned by BIOS or OS. Interrupt assignment of some devices of X86
platform is shown in the table below, but it does not show the interrupt source
occupied by the PCI devices.
Level
Function
IRQ0 System
Timer
IRQ1
Standard 101/102-key or Microsoft keyboard
IRQ2
Programmable interrupt controller
IRQ3 COM3/COM4
IRQ4 COM1/COM2
IRQ5 Reserved
IRQ6
Reserved for floppy controller
IRQ7 Reserved
IRQ8
System CMOS/Real-time Clock
IRQ9 ACPI
IRQ10 Reserved
IRQ11 Reserved
IRQ12 PS/2
mouse
IRQ13
Numeric data processor
IRQ14 Master
IDE
IRQ15 Reserved
