BIOS / firmware archive whose name, D-NR6-D-021-1.0, gives no model or brand that can be identified with certainty; it looks like an internal board or project code with a version suffix. The ZIP is 4.84 MB. Before use, compare that code with markings on the PCB or sticker on the flash chip. Firmware of this kind is written with an SPI programmer to recover a board with corrupted BIOS; save the original dump first and confirm the image size fits the chip.
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 .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →