ASUS PRO554N mainboard files for the P2540NV board, revision 2.0, in an 18.7 MB RAR catalogued as BIOS or firmware. The name does not state exactly what is inside, so the archive may also hold more than a single SPI dump. Inspect the contents and identify the image intended for the system flash chip before programming. Confirm the board name and revision on the PCB, read the original chip first, and match the file size to the chip capacity so the image fits.
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 .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →