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30
Checkpoint Code
EF
E9 or EA
F0
F1
F2
F3
F5
FA
FB
F4
FC
FD
FF
Description
Read error occurred on media. Jump back to check-
point EB.
Determine information about root directory of
recovery media.
Search for pre-defined recovery file name in root
directory.
Recovery file not found.
Start reading FAT table and analyze FAT to find the
clusters occupied by the recovery file.
Start reading the recovery file cluster by cluster.
Disable L1 cache.
Check the validity of the recovery file configuration
to the current configuration of the flash part.
Make flash write enabled through chipset and OEM
specific method. Detect proper flash part. Verify that
the found flash part size equals the recovery file size.
The recovery file size does not equal the found flash
part size.
Erase the flash part.
Program the flash part.
The flash has been updated successfully. Make flash
write disabled. Disable ATAPI hardware. Restore
CPUID value back into register. Give control to F000
ROM at F000:FFF0h.
3 Getting Started
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