BIOS image for the Dell XPS 13 L321X on board DA0D1 3MBCD1, revision A00, labelled D1, archived as a 2.00 MB RAR file. The DA0 prefix with an MB marking follows the Quanta board-numbering pattern used for many Dell laptops. The dump is used to reprogram the SPI chip when the machine will not post or the firmware is damaged. Compare the image size with the flash chip, confirm the PCB revision, and back up the original contents first, since service tag data is stored there.
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 @bioshub. 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 →