ZIP archive of 975 KB for the ASUS K42JK, with the 218 in the name read as the BIOS version. The compact size suggests an official ASUS update file rather than a full raw chip dump, which for this generation would usually be larger. ASUS update files can carry a capsule header and may need conversion before external SPI programming. Unzip it, check the contents and size against the flash, verify the board model, and keep a copy of the original chip before any write.
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 →