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Error and Information Messages
Error Message
8042 Gate - A20 Error
Address Line Short!
Cache Memory Failure, Do Not Enable
Cache!
CH-2 Timer Error
CMOS Battery State Low
CMOS Checksum Failure
CMOS System Options Not Set
CMOS Display Type Mismatch
CMOS Memory Size Mismatch
CMOS Time and Date Not Set
Diskette Boot Failure
DMA Error
DMA #1 Error
DMA #2 Error
6-12
Explanation
Gate A20 on the keyboard cont4oller (8042) is
not working. Replace the 8042.
Error in the address decoding circuitry on the
baseboard.
Cache memory is defective.
Most AT systems include two timers. There is
an error in timer 2.
CMOS RAM is powered by a battery. The
battery power is low. Replace the battery.
After CMOS RAM values are saved, a
checksum value is generated for error
checking. The previous value is different from
the current value. Run Setup.
The values stored in CMOS RAM are either
corrupt or nonexistent. Run Setup.
The video type in CMOS RAM does not match
the type detected by the BIOS. Run Setup.
The amount of memory on the baseboard is
different than the amount in CMOS RAM. Run
Setup.
Run Setup to set the date and time in CMOS
RAM.
The boot disk in floppy drive A: is corrupt. It
cannot be used to boot the system. Use
another boot disk and follow the screen
instructions.
Error in the DMA Controller.
Error in the first DAM channel.
Error in the second DMA channel.
Solving Problems
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