BIOS firmware for the Asus K42JA notebook, in a 1.02 MB ZIP tagged AS300, most likely BIOS version 300. The archive may contain an Asus update capsule or a raw image, so check before sending it to a programmer. Typical repair use is restoring a board after a failed flash, where the laptop powers on but stays at a black screen. Read and archive the existing chip contents to keep serial and MAC data, match the motherboard to the K42JA model, and verify the programmed chip.
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 →