BIOS firmware for the Sony VAIO VPCEC3M1E on Foxconn-made board MBX-225, also labelled M981, in a 3.07 MB RAR. MBX numbers are Sony board identifiers, while M981 is the Foxconn project code for this design. Unpack the archive and confirm the image size matches the SPI flash chip. Technicians use it to reflash a board that fails to boot after firmware damage, working with an external programmer. Check the MBX-225 and M981 markings on the PCB, and keep a backup of the original chip first.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosarchive. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →