ASUS M4N78 PRO desktop motherboard BIOS, revision 1303, supplied as a 1.00 MB .ROM file. The size corresponds to an 8 Mbit flash chip, so it can be written with an external programmer or, on a working board, through the ASUS update utility. Board-level recovery after a bad flash is the usual reason to keep such an image. Check that the board model printed on the PCB matches M4N78 PRO, confirm the chip capacity, and read the existing contents first so you can roll back if the new image misbehaves.
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 .rom file
A BIOS image as shipped by the vendor (commonly AMI) — often the BIOS region only, without descriptor or ME.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →