ASUS BIOS file for the K42N notebook, version 213, as shown by the .213 extension in ASUS's usual naming style. It is 2 MB in size, which matches a 16-megabit SPI flash. Such update files can be applied with ASUS flashing tools or, after any header handling, written with a hardware programmer. Check the model on the case or board, save the current chip contents, and verify the image size matches the installed flash before writing.
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 @bios_laptop. Enginerys does not host this file.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →