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Appendix A: BIOS POST Codes
Terminal POST Errors
Code
Description
CEh
Initialize digitizer and display message
D2h
Unknown interrupt
The following are for the boot block in Flash ROM:
Boot Block Flash ROM Terminal POST Errors
Code
Description
E0h
Initialize the chipset
E1h
Initialize the bridge
E2h
Initialize the CPU
E3h
Initialize system timer
E4h
Initialize system I/O
E5h
Check force recovery boot
E6h
Checksum BIOS ROM
E7h
Go to BIOS
E8h
Set Huge Segment
E9h
Initialize Multi Processor
EAh
Initialize OEM special code
EBh
Initialize PIC and DMA
ECh
Initialize Memory type
EDh
Initialize Memory size
EEh
Shadow Boot Block
EFh
System memory test