Troubleshooting
ROBO-8716VG2A User’s Manual
5-11
disable COM1 serial port to release IRQ #4
disable COM2 serial port to release IRQ #3
disable parallel port to release IRQ #7…,etc
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
Ethernet Controller (Shareable)
IRQ #5
USB 1.0/1.1 EHCI Controller
IRQ #6
Unassigned (Shareable)
IRQ #7
Parallel Port
IRQ #8
CMOS Clock
IRQ #9
Display Controller
IRQ #9
USB 1.0/1.1 EHCI Controller
IRQ #9
ACPI Controller (Shareable)
IRQ #10
Ethernet Controller (Shareable)
IRQ #10
USB 2.0 EHCI Controller (Shareable)
IRQ #11
Primary IDE Controller(Shareable)
IRQ #11
SM Bus Controller (Shareable)
IRQ #11
Multimedia Device (Shareable)
IRQ #12
Unassigned (Shareable)
IRQ #13
Unassigned Data Processor
IRQ #14
Secondary IDE Controller
IRQ #15
Unassigned (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.
