Code
Cause
Code
Cause
Code
Cause
Code
4–2–4
Cause
Unexpected interrupt in protected mode
Code
4–3–1
Cause
Memory failure above address 0FFFFh
Code
Cause
Code
Cause
Code
4–4–1
Cause
Serial or parallel port test failure
Code
4–4–2
Cause
Failure to decompress code to shadowed memory
Code
4–4–3
Cause
Math coprocessor test failure
Code
Cause
Error Messages
Address mark not found
Description
The BIOS found a faulty disk sector or could not find a particular disk sector.
48
4–2–1
No time tick
4–2–2
Shutdown failure
4–2–3
Gate A20 failure
4–3–3
Timer-chip counter 2 failure
4–3–4
Time-of-day clock stopped
4–4–4
Cache test failure