Troubleshooting
ROBO-8777VG2A User’s Manual
5-3
Disable COM1 serial port to release IRQ #4
Disable COM2 serial port to release IRQ #3
Disable Parallel port to release IRQ #7
Disable PS/2 mouse to release IRQ #12,
Etc…
A quick review of the basic IRQ mapping is given below for your reference.
IRQ#
Description
IRQ #0
System Timer
IRQ #1
Keyboard Event
IRQ #2
Usable IRQ
IRQ #3
COM2
IRQ #4
COM1
IRQ #5
Usable IRQ
IRQ #6
Diskette Event
IRQ #7
Usable IRQ
IRQ #8
Real-Time Clock
IRQ #9
Usable IRQ
IRQ #10
Usable IRQ
IRQ #11
Usable IRQ
IRQ #12
IBM Mouse Event
IRQ #13
Coprocessor Error
IRQ #14
Hard Disk Event
IRQ #15
Usable IRQ
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.
