Firmware dump for a Sony VAIO motherboard MBX-165, model code MS90, with PCB part number 1P-0073500-8012. That part number is the most reliable way to match it, so compare it with the label printed on the board. Sony uses MBX numbers for its own motherboard designs, with several MS revisions under one code. Use an SPI programmer to read and save the original chip first, check the dump size against the flash capacity, then write and verify to recover a corrupted BIOS.
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 →