Firmware package for a Sony VAIO mainboard carrying the MBX-241 board number, supplied as a ZIP archive of roughly 1.53 MB. No BIOS version, flash chip or working status is given in the name, so inspect the contents first. MBX numbers are Sony's own board designations, and the code on the PCB must match exactly, since neighbouring MBX numbers are different designs. Before writing with an SPI programmer, dump and keep the existing chip contents, and make sure the file size equals the chip capacity.
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 .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →