BIOS firmware archive for a board identified only by the code name Tobacco, revision A, packed as a 5.89 MB RAR file. The name gives no brand, model or board number, so the target machine has to be confirmed from the PCB silkscreen or the project name printed near the chipset before use. Unpack it and compare the image size with the SPI flash chip on the board. Read and save the original chip contents with a programmer such as a CH341A first, so you can always restore the factory state if the flash does not go well.
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 @dtechbios. 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 →