Troubleshooting
RUBY-9712VG2A User’s Manual
5-6
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
Unused
IRQ #3
COM2
IRQ #4
COM1
IRQ #5
USB Controller 1.0/1.1
IRQ #5
Multimedia Controller
IRQ #5
Display Controller
IRQ #6
Floppy Controller
IRQ #7
Parallel Port
IRQ #8
Real Time Clock
IRQ #9
USB Controller 2.0 EHCI Controller
IRQ #9
USB Controller 1.0/1.1
IRQ #9
ACPI Controller
IRQ #10 USB Controller 1.0/1.1
IRQ #10 Network Controller
IRQ #11 USB Controller 1.0/1.1
IRQ #11 Network Controller
IRQ #11 SMB Controller
IRQ #12 PS/2 Mouse
IRQ #13 Unused
IRQ #14 IDE Primary Controller
IRQ #15 IDE Secondary 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.