BIOS file for a board identified only as 945GC-M4, in a small 437 KB RAR archive; the name gives no brand or revision. The 945GC string implies an Intel 945GC chipset desktop board of the Core 2 generation, and such boards often use small flash chips of a few hundred kilobytes to 1 MB. A technician can write the image with an SPI or parallel programmer depending on the chip fitted. Read and keep the original contents first, check the chip capacity against the image size, and confirm the board marking.
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 →