BIOS dump for the Sony VAIO MBX-218 motherboard, also coded M851, revision 1.0, marked Ok as a reported working image. The 2.00 MB binary fits a 16 Mbit SPI flash chip. M851 is the internal board model code that often appears alongside the MBX number on Sony boards. Check both codes and the revision on the PCB before flashing, save the existing chip contents, and write the file with an external programmer, verifying the result.
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 @bios_laptop. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →