BIOS archive tagged TS77 with the further tokens L130717 and PN646530, which look like a build or date code and a part number. The image is described as 8MB, so it suits a 64-megabit SPI flash. The name gives no brand or device model, so identify your board carefully before using it. Unpack the RAR, confirm that the image size equals the chip capacity, and read and save the existing chip contents with a programmer before writing anything.
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 →