Firmware for a Sony Vaio mainboard MBX-196, packaged as an 857 KB RAR archive. Sony labels its laptop boards with MBX numbers, which are printed on the PCB along with the ODM project code. The name gives no model, so match the MBX code and check the archive contents before use. A dump like this can recover a Vaio with corrupted BIOS; save the existing chip, verify the image size matches it, and confirm the write with your programmer.
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 →