BIOS for the Sony VAIO VGN-NW20EF on motherboard MBX-218, with M851 as the platform or board model code, delivered as a 2.00 MB binary. MBX numbers are Sony's own motherboard designations, while the underlying board may come from an ODM. Use the dump to recover the laptop after a failed update or corruption by programming the SPI chip externally. Check the MBX-218 label on the board, confirm a 16 Mbit flash chip, and keep a copy of the original contents before writing anything.
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 .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 →