BIOS image for the Apple logic board 820-00165-A, marked as password security unlocked and cleared, packed as a 3.97 MB RAR. The name does not state the Mac model, so identify it by the 820 number printed on the board. A cleared dump is used to remove a firmware lock during repair once ownership is confirmed, by writing the SPI ROM with an external programmer. Back up the original chip before flashing, make sure the image size matches the flash capacity, and check the revision letter on the PCB.
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 →