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Tuesday, February 17, 2009

Fujitsu-Siemens BIOS File Structure

This is a quick post. Will be updated later. Just being here to remind me (haven't write it anywhere yet).

The Fujitsu-Siemens BIOS binary distributed in its website is not a plain BIOS binary which you can flash directly to their motherboard without using its propietary tool. The BIOS file structure is quite peculiar from other vendors. Here it is:

| Some unidentified header (yet) |
|   "real" BIOS binary           |
| 1-byte 8-bit checksum          |
In quick inspection, the header ends at offset 0x70 from the beginning of the BIOS file distributed by Fujitsu-Siemens. The particular BIOS I'm working on contains an altered AMI BIOS

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