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BIOS Manual
Beeps
Error message
1
Refresh Failure
2
Parity Error
3
Base 64 KB Memory Failure
4
Timer Not Operational
5
Processor Error
6
8042 - Gate A20 Failure
7
Processor Exception
Interrupt Error
8
Display Memory Read/Write
Error
9
ROM Checksum Error
10
CMOS Shutdown Register
Read/Write Error
Refer to the table on page A-3 for solutions to the error beep codes.
Description
The memory refresh circuitry on the
motherboard is faulty.
A parity error was detected in the base
memory (the first 64 KB block) of the
system.
A memory failure occurred within the
first 64 KB of memory.
A memory failure was detected in the
first 64 KB of memory, or Timer 1 is
not functioning.
The CPU on the system board
generated an error.
The keyboard controller (8042) contains
the Gate A20 switch which allows the
CPU to operate in virtual mode. This
error means that the BIOS cannot
switch the CPU into protected mode.
The CPU on the motherboard generated
an exception interrupt.
The system video adapter is either
missing or its memory is faulty.
Please Note: This is not a fatal error.
The ROM checksum value does not
match the value encoded in the BIOS.
The shutdown register for CMOS
memory has failed.
A-2
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