Inventors:
Lois D. Mermelstein - Austin TX
Assignee:
Dell Products L.P. - Round Rock TX
International Classification:
G06F 15177
US Classification:
714 36, 714 25, 714 30, 713 2
Abstract:
One embodiment is a method of detecting BIOS corruption that does not require reprogramming of the boot block or calculation of cyclic redundancy (âCRCâ) codes. A simple check is performed using only the first byte or bytes of BIOS to be erased (âFirst Byteâ) and the last byte or bytes of BIOS to be programmed (âLast Byteâ) 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.