BIOS for the Dell XPS 15 L502x on board DAGM6CM8D0, revision D, archived as a 4.21 MB RAR. The DA-prefixed number is a Quanta pattern, the ODM behind this XPS. Technicians write such dumps to the SPI flash with an external programmer when the machine is dead, stuck on a black screen or locked by corrupted firmware. Confirm the board number and revision on your motherboard match, make a backup of the original chip, and verify the image size against the flash 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 →