Firmware for a Sony VAIO board MBX-215, revision 1.1, model code M931, stored in a 1013 KB ZIP. The name does not state whether it contains only BIOS or also embedded controller code, so review the archive before flashing. Such images are written to the SPI flash with a programmer to revive a board that fails to power on or post. Confirm that the MBX-215 number and Rev 1.1 marking match, back up the existing chip, and check the image size fits the flash chip.
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 →