Welcome to the dark corner of BIOS reverse engineering, code injection and various modification techniques only deemed by those immensely curious about BIOS

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


Post a Comment

No comments: