Troubleshooting
96M4281o User’s Manual
5-12
A quick review of the basic IRQ mapping is given below for your reference.
IRQ#
Description
IRQ #0
System Counter
IRQ #1
Keyboard
IRQ #2
Programmed Controller
IRQ #3
COM2
IRQ #4
COM1
IRQ #5
Display, Network, USB 1.0/1.1 UHCI
Controller
IRQ #6
Floppy Disk Controller
IRQ #7
Printer Port (Parallel Port)
IRQ #8
CMOS Clock
IRQ #9
ACPI Controller
IRQ #10
USB 1.0/1.1 UHCI Controller, Multimedia
Device
IRQ #11
Network Controller
IRQ #12
SMBus , USB 1.0/1.1 UHCI, USB 2.0 EHCI
Controller
IRQ #13
PS/2 mouse
IRQ #14
Data Processor
IRQ #15
Primary IDE Controller
It is then very easy to find out which IRQ resource is ready for additional
peripherals. If IRQ resource is not enough, please disable some devices listed above
to release further IRQ numbers.