Firmware for a P4M800 chipset socket 775 desktop motherboard, in a 373 KB RAR. The name identifies only chipset and socket, not the board maker or BIOS version, so several different boards could share this description. Confirm the exact model and revision printed on the PCB before using it. A dump like this is written to the BIOS chip with an external programmer to recover a board that fails to post. Always read and save the original chip first and verify that the image size equals the chip capacity.
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 @afsbiosfree. 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 →