Boot ROM firmware for the Apple A1286 with logic board 820-2915-B, labelled in the name as tested and working. The archive is a 3.77 MB RAR. Technicians use such a dump to recover a MacBook Pro with a corrupted SPI flash that will not boot or loops at power-on. Write it with an SPI programmer, but read and save the existing chip first, since it holds the serial number and system data. Confirm the image fits the flash chip capacity and that the board number matches.
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 →