This script makes Downgrade-able BIOS update file from Dell original BIOS updates. Due to a claim from Dell that many people have failed to downgrade and their machines could not boot up, the video ...
If you have a dump of the SPI flash of a Lenovo Thinkpad (newer than T4x I guess) you may try this tool and get some info about the different regions of the flash (descriptor table, BIOS, Intel ME, ...
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