User manual

Chapter 3 BIOS Setup
EC3-1813CLD2NA(B) - 41 -
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 Drive Controller
IRQ7 Reserved
IRQ8 System CMOS/Real Time Clock
IRQ9 ACPI
IRQ10 Reserved
IRQ11 Reserved
IRQ12 PS/2 Mouse
IRQ13 Numeric Data Processor
IRQ14 Primary IDE
IRQ15 Reserved