Apple A1708 MacBook Pro firmware binary for logic board 820-00840-A, read from component U2890, provided in a 370 KB ZIP. The 820 number with an A suffix is Apple's board and revision identifier and should match the silkscreen on your board. A small flash chip at this location is usually reprogrammed during board repair or chip replacement. Back up the existing data first with a suitable programmer, verify the chip model and capacity, and only then write the image.
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 →