Boot ROM firmware for the Apple MacBook Pro A1229, project M76, with logic board 820-2132 revision A and the 051-7261 number, which Apple typically assigns to the schematic or board drawing. The 1.35 MB RAR is used to restore EFI firmware on the SPI chip with a programmer when the laptop has no chime or boot. Verify the board number on the PCB, save the original chip contents to keep serial data, and check that the dump matches the flash chip size.
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 →