Binary file named SMC.bin, only 809 bytes, listed as BIOS or firmware, with no model or board number given in the name. A file this small is far too short to be a full SMC or BIOS firmware and is more likely a fragment, configuration block or key data extracted from a larger image. Inspect it with a hex editor before using it anywhere, determine what region it belongs to, and never program it in place of a full chip image, because the size will not match the flash device.
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 @generalproblemsolved. 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 →