Sony VAIO SVT1312V1ES firmware with BIOS version R0150D4, for board MBX-265, a Sony motherboard designation. The 3.14 MB RAR is meant for recovering a notebook with a corrupted BIOS by writing the SPI flash with a programmer. Sony boards also store system identity data in flash, so read and keep the original chip contents before replacing them. Check that MBX-265 is printed on your board, compare the model code, and confirm the image length equals the chip capacity before erasing.
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 →