Troubleshooting
PGB-5120S User’s Manual
5-3
Disable Serial Port1 to release IRQ #4
Disable Serial Port2 to release IRQ #3
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.
5.3
FAQ
Symptom: SBC keeps beeping, and no screen has shown.
Solution:
In fact, each beep sound represents different definition of error message.
Please refer to table as following:
Beep sounds
Meaning
Action
One long beep with one
short beeps
DRAM error
Change DRAM or reinstall it
One long beep constantly DRAM error
Change DRAM or reinstall it
One long beep with two
short beeps
Monitor or Display
Card error
Please check Monitor connector
whether it inserts properly
Beep rapidly
Power error warning
Please check Power mode setting
