Small RAR archive of about 61 KB filed as BIOS or firmware, named only P 20500, with no brand, model or board number stated. The size is far too small for a full system BIOS image, so it may hold an EC or KBC firmware or a partial dump, which you should confirm after extracting it. Before writing anything to a chip, check the file size against the chip capacity, back up the original contents with a programmer and make sure the image belongs to your exact board.
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 @emdadbios. 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 →