BIOS backup for the Lenovo S215, packed as a RAR archive of 1.68 MB, taken from a board marked BM5291 at version 1.3. The name presents it as a backup read from a working unit rather than a vendor update. Before using it, unpack the archive, confirm the BM5291 number and 1.3 revision printed on the PCB, and check that the image size equals the SPI chip capacity. Read and save the original chip contents with your programmer first so the machine can be restored if the new image misbehaves.
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 @afsbiosfree. 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 →