Firmware package for the Apple M1 MacBook Pro A2338, logic board 820-02020 revision A, according to the file name. The 820- prefix is Apple's own logic board numbering, and the suffix letter gives the revision. Apple Silicon machines handle firmware differently from Intel Macs, as restores are normally done through DFU with Apple Configurator, so check what the ZIP actually contains before using it. Make sure the board number on the PCB is 820-02020 and keep a backup of any chip you intend to rewrite.
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.
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 →