BIOS firmware for the ASRock B85M Pro motherboard, version 3.40, in a 2.94 MB RAR archive. The B85 platform normally keeps its firmware on an SPI flash, and a full dump includes the Intel ME region alongside the BIOS. Write it with an external programmer when the board no longer POSTs or a flash update has failed. Before programming, back up the original chip, compare the image size with the flash capacity, and confirm that the board model printed on the PCB matches, since ASRock sells several similar B85M variants.
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 →