Bios Error Messages - IBM B01 Service Manual

IOSP
Beep
Count.
Message
Description
6 8042 - Gate A20 Failure The keyboard controller (8042) contains
the Gate A20 switch which allows the
CPU to operate in protected mode. This
error message means that the BIOS is
not able to switch the CPU into protected
mode.
7 Processor Exception
The CPU on the processor board has
Interrupt Error generated an exception interrupt.
8
Display Memory The system video adaptor is either
ReadlWrite Error missing or its memory is faulty.
Note: This is not a fatal error.
9 ROM Checksum Error The ROM checksum value does not
match the value encoded in the BIOS.
10 CMOS Shutdown Register The shutdown register for the CMOS
ReadlWrite Error RAM has failed.
11 Cache Memory Bad; Do The cache memory test failed. Cache
Not Enable Cache
memory is disabled. Do not press
<Ctrl><Alt><Shift><+> enable cache
memory.
BIOS Error Messages
If a non-fatal error occurs during the POST routines performed each time the
system is powered on, the error message will appear on the screen in the following
format:
ERROR Message Line 1
ERROR Message Line 2
Press Fl to Resume
Note the error message and press the <F1> key to continue with the bootup
procedure.
Note: If the "Wait for 'F1' If Any Error" option in the Advanced Setup portion of the
BIOS Setup Program has been set to Disabled, the "Press F1 to Resume" prompt
will not appear on the third line.
For most of the error messages, there is no ERROR Message Line 2. Generally,
for those messages containing an ERROR Message Line 2, the text will be "RUN
SETUP UTILITY." Pressing the <F1> key will invoke the BIOS Setup Utility.
A description of each error message appears below. The errors are listed in
alphabetical order, not in the order in which they may occur.
Message Description
8042 Gate-A20 Error
The gate-A20 portion of the keyboard controller (8042)
has failed to operate correctly.
Address Line Short!
An error has occurred in the address decoding circuitry of
the processor board.
Chapter 6. Single Board Computer and Attached 1/0
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