Firmware dump for Apple board 820-00928 with EMC number 3162, in an 8.00 MB raw binary. The EMC number helps confirm the model generation the image belongs to. Technicians flash it to the SPI chip storing the EFI firmware with a hardware programmer when corrupted firmware stops the machine from booting. Read and keep the original chip contents, verify the 820 number on the logic board, and be ready to restore serial and system data from the original dump.
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 @efibios. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →