Working BIOS image for a board marked DA0U81MB6C0, revision C, a 5.95 MB RAR archive. The DA0 prefix follows the Quanta numbering scheme, though the name does not say which laptop brand uses the board. Confirm the board number and the revision letter on the PCB before programming. Dump the original SPI chip first, and check that the image size matches the chip capacity before you write it with a programmer.
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 →