BIOS/firmware package for a laptop mainboard numbered DAU88MMB6A0, revision A, compressed into a 5.86 MB RAR. The DA...MB6 pattern is Quanta numbering, so the board was built by Quanta even though the notebook brand is not named. Such dumps are usually written to the SPI flash with a programmer such as a CH341A to recover a corrupted or locked BIOS. Check that the board number and revision match the PCB, read and save the original chip contents first, and make sure the image size matches the flash 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.
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 →