Raw firmware dump for an Apple logic board numbered 820-3023, sized 8.00 MB to match a 64 Mbit SPI flash chip. Apple uses the 820- prefix for its own logic board part numbers, which are printed on the PCB. Technicians use such dumps to reprogram the boot ROM on a MacBook that will not chime or start, often after liquid damage or a corrupted chip. Check that the board number on the PCB matches, and read out the original chip first. The original may contain the serial number and other machine-specific 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 @bios_laptop. 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 →