BIOS for the Biostar H81MLC motherboard, version 7.3, with the build identifier H81CR609 in the name, packed in a 3.02 MB RAR. A technician uses such an image to reprogram the SPI BIOS chip after a failed update or corruption, typically with a CH341A or similar programmer, or a socketed chip swap. Confirm the board model and version on the PCB, read and keep the original contents before writing, and check that the image size corresponds to the flash 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 .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 →