BIOS dump for Apple logic board 820-2993 revision A, the Mac mini A1347 board, noting the HM65 chipset and a Macronix MX25L6405 flash chip. That part is a 64 Mbit device, so the image inside this 3.8 MB RAR should be 8 MB to fit. Apple uses the 820-xxxx scheme for its boards, so confirm the number on yours. Dump the original chip first, as it holds the serial and system configuration, then program and verify with an SPI programmer to repair a board that will not chime or boot.
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 (3)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 5 Dec 2023 | Open file on RM Schematics |
| @generalbios | 17 Dec 2023 | Open file on RM Schematics |
| @generalbios | 14 Jul 2024 | 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 →