BIOS firmware package for E502NA, likely the ASUS laptop of that model, though no brand is stated. The name indicates an 8 MB image including Intel TXE, the Trusted Execution Engine used on Atom and Celeron platforms instead of a full ME; the trailing 3 may be a version. A zip of 5.36 MB compressed is consistent with an 8 MB dump. Write it with an SPI programmer after saving the original, and confirm the flash chip is 8 MB.
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 .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →