Firmware dump for Apple logic board 820-00928 revision A, intended for a W25Q64BV SPI flash chip, packed in a 4.28 MB RAR. The W25Q64BV is a Winbond 64 Mbit part, so the extracted image should be 8 MB to fit it. The name does not identify the Mac model, so confirm it from the 820 number on the logic board. Flash it with a programmer supporting this chip to repair boot failures, after backing up the original contents, which contain the serial and system configuration data.
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 (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 23 Sept 2019 | Open file on RM Schematics |
| @biositechyangiyer | 19 May 2020 | Open file on RM Schematics |
| @one5technology | 10 Nov 2020 | Open file on RM Schematics |
| @biosdumpcomputer | 25 May 2022 | Open file on RM Schematics |
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 →