Firmware dump for Apple logic board 820-01134-A, the iMac board family also numbered 820-00134, supplied as a ZIP of about 747 KB. The name does not state the flash chip or firmware version, so inspect the contents before use. Apple firmware is usually written to the SPI ROM with an external programmer when the original is corrupted. Back up the existing chip, which holds machine-specific data such as the serial, and check the image size against the chip capacity.
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 | 23 Dec 2023 | Open file on RM Schematics |
| @generalbios | 14 Jul 2024 | 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 →