Firmware image for the Apple A2289 MacBook Pro, logic board 820-01987-06, from component U2890, packed in a 238 KB RAR. On Apple Intel boards U2890 is commonly the location of a small flash chip associated with the T2 or EC area rather than the main firmware. Apple uses 820-xxxxx numbers with a revision suffix for logic boards. Before writing, read and save the existing contents, verify the chip marking and capacity, and confirm that the 820 number on the PCB matches.
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 .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 →