Troubleshooting
ROBO-8910VG2A User’s Manual
5-10
Interrupt Request Lines (IRQ)
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
Multimedia Device (Shareable)
IRQ #6
Unassigned (Shareable)
IRQ #7
Parallel Port
IRQ #8
CMOS Clock
IRQ #9
ACPI Controller (Shareable)
IRQ #10
USB 1.0/1.1 EHCI Controller
IRQ #10
Display Controller
IRQ #11
Ethernet Controller (Shareable)
IRQ #11
USB 1.0/1.1 EHCI Controller
IRQ #12
Unassigned (Shareable)
IRQ #13
Unassigned Data Processor
IRQ #14
IDE Controller (Shareable)
IRQ #15
USB 1.0/1.1 EHCI Controller
IRQ #15
USB 1.0/1.1 EHCI Controller
IRQ #15
USB 2.0 EHCI Controller (Shareable)
IRQ #15
SM Bus Controller (Shareable)
IRQ #15
Ethernet Controller (Shareable)
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. The IRQ list will show on the Post sequences as system
hardware checking.
