Firmware image for an H81M-CS motherboard in a 4.58 MB RAR archive, with no maker, revision or BIOS version in the name. The board name points to an Intel H81 desktop platform, and a related BR-SI tagged dump also exists, so compare which suits your board. A technician flashes such a dump onto the SPI chip with a hardware programmer to recover from a failed update or corruption. Read and keep the original chip contents, verify the model on the PCB and check the size.
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 →