Firmware dump for the Apple MacBook Pro A1398, EMC 2673, logic board 820-3332-A, packed in a 4.77 MB RAR. Apple prints the 820-xxxx number on the logic board, so match it before use. Images like this are written to the SPI flash with a programmer to recover a board stuck without boot or a corrupted EFI. Keep a backup of the original chip, since it holds the serial number and other unique data. Also verify that the image size equals the chip capacity before writing.
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 .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →