Firmware archive for the Sony MBX-226 mainboard, a Sony board code used in VAIO notebooks, provided as a 1.01 MB RAR. The name gives only the board number, without BIOS version or chip type. Technicians write this kind of image to the SPI flash to recover a board with corrupted firmware or no power-on response. Verify the MBX code on the PCB matches exactly, back up the current chip with a programmer before writing anything, and ensure the image size equals the flash 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 .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 →