Lenovo CIG41S motherboard firmware at version 1.2, combining a 1MB BIOS image with the EC controller firmware, packed as a ZIP of 481 KB. The 1MB figure tells you the target flash chip should be 8 Mbit. A different capacity means the dump will not fit. Use an external programmer to reflash the BIOS chip, and the EC firmware if the keyboard controller side is faulty. Back up the existing contents first and match the version on the PCB, since CIG41S boards came in several revisions.
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 .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 →