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198
Checkpoint
Beep Code
Code
E1h
E2h
E3h
E4h
E5h
E6h
E7h
E8h
E9h
EAh
EBh
ECh
EDh
EEh
EFh
F0h
F1h
F2h
F3h
F4h
F5h
F6h
Appendix D: BIOS POST Checkpoint Codes
Description
Initialize the bridge.
Initialize the CPU.
Initialize system timer.
Initialize system I/O.
Check force recovery boot.
Checksum BIOS ROM.
Go to BIOS.
Initialize Multi-Processor
Set huge segment.
Initialize OEM special code.
Initialize PIC and DMA.
Initialize Memory type.
Initialize Memory size.
Shadow Boot Block.
System memory test.
Initialize interrupt vectors.
Initialize Run Time Clock.
Initialize video.
Initialilze System Management Mode.
Output one beep.
Boot to Mini DOS.
Clear Huge Segment.
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