Bios corruption detection system and method

   
   

One embodiment is a method of detecting BIOS corruption that does not require reprogramming of the boot block or calculation of cyclic redundancy ("CRC") codes. A simple check is performed using only the first byte or bytes of BIOS to be erased ("First Byte") and the last byte or bytes of BIOS to be programmed ("Last Byte") during reprogramming. Specifically, if both the First and Last Bytes are programmed, indicating either that erasure did not occur or that reprogramming was successful, the BIOS is not corrupt and no remedial action need be taken. If the First Byte is erased and the Last Byte is programmed, indicating that a failure occurred during erasure, the BIOS is corrupt and remedial action must be taken. Similarly, if the First Byte is programmed and the Last Byte is erased, indicating that a failure occurred during reprogramming, the BIOS is corrupt and remedial action must be taken. Finally, if both the First and Last Bytes are erased, the BIOS is corrupt and remedial action must be taken.

 
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