Zipped BIOS file named bottom, which points to a dump from the lower of two flash chips or from the underside of a board. The name gives no model, board number or capacity. Such split dumps come from boards that use two SPI chips, and the matching top image is usually needed as well. Before programming, identify the source board, check that the unpacked size matches the chip capacity, and save the original contents of each chip with your programmer so the work can be reversed.
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 @vinafix_bios. 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 →