Generic Apple MacBook firmware dump; the name states no model, year or logic board number, so its exact target is unknown. The file is a 2 MB binary, a size seen in EFI flash chips on older MacBook boards. Before writing it to any machine, inspect the image with a hex editor for identifying strings and match them with the 820 board number on the logic board. Read and keep the original contents first, since Mac firmware stores serial and machine-specific information.
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 @abgm_manutencao_bios. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →