Firmware dump for Apple logic board 820-00928-A, the A suffix marking the board revision, zipped to 5.11 MB. The image is meant to be written to the board's SPI flash chip with a programmer when the original firmware is corrupted or locked. Before writing, read and keep the original chip contents, since a donor dump may carry another machine's serial and settings that need correcting. Check that the extracted image size matches the flash chip capacity and that the 820 number on the board agrees.
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.
All sources (2)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 24 Jun 2021 | Open file on RM Schematics |
| @biosarchive | 3 Oct 2021 | Open file on RM Schematics |
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →