Sony VAIO BIOS dump for the MBX-202 board, with M791 also given in the name, compressed into a RAR of about 835 KB. The MBX-202 number is printed on the PCB and should be checked before writing. It is used to recover the board after corrupted firmware, or to clear a locked BIOS by flashing a clean image with an SPI programmer. Read the original chip first and keep that file, then make sure the extracted dump is the same size as the chip before programming and verifying it.
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 →