Early BIOS version 1.01 for the P8H77-M PRO motherboard, archived as a 109 KB RAR. Older firmware can be useful for matching what a board originally shipped with or for testing whether a fault appeared after an update. Recovery normally involves writing the extracted image straight to the SPI chip with a programmer such as a CH341A. Check the model printed on the PCB, keep a backup of the existing chip contents, and ensure the file size matches the flash capacity before proceeding.
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 →