A BIOS / firmware dump for Apple hardware (board 820-2784). Shared as “A1311 K74 051-8337 820-2784 TESTED BIOS”, 4.00 MB.
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 @generalbios. Enginerys does not host this file.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →