RAR archive of 991 KB with the uninformative name 1520, which gives no brand, model or board number. It may relate to a laptop model numbered 1520, but that cannot be confirmed from the name alone, so open the archive and inspect any text or image headers before use. Firmware files like this are generally written to an SPI flash chip with an external programmer. Only use it once the source model is confirmed, the file size matches the chip, and the existing contents are backed up.
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 →