Firmware package for a board marked CIH81M, revision 1.0, compressed into a 6.20 MB RAR. The name suggests an Intel H81 chipset desktop board, though no brand is stated, so compare the silkscreen on the PCB carefully. Such archives usually hold a full SPI flash image for programming with a hardware programmer when the BIOS is corrupt. Back up the existing chip before writing, and make sure the image size equals the flash chip capacity; on Intel platforms the dump may also include the ME region.
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 →