BIOS file for a board labelled BTC 79X5 version 1.0, packed as a 4.56 MB RAR archive; the name gives no brand or chipset beyond this code. Before using it, check that the model and version printed on the PCB match exactly. A dump like this is normally written to the SPI flash chip with a hardware programmer to recover a board with corrupted or erased firmware. Read and keep the original chip contents first, and verify that the image size equals 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 →