BIOS firmware archive for a CIH81M motherboard, version 1.0, also identified as MB6C99-A; the name suggests an H81 chipset desktop board, though the brand is not given. A file like this is used to reflash the SPI BIOS chip when the board does not post after a failed update or firmware corruption. Write it with an external programmer or a flashing tool, but first read and keep a copy of the original chip. Verify the board marking matches CIH81M and that 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 @biosarchive. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →