BIOS for the HP All-in-One 20-C002IN, built on Quanta board DAN91CMB6D0, with 081BB noted in the name as a revision or version marker. Quanta numbers its boards with the DA prefix and HP uses many of them in desktop and all-in-one machines. Technicians write such an image to the SPI flash with a programmer to recover a bricked or corrupted unit. Save the original chip contents before writing, make sure the image size matches the flash capacity, and confirm the board number on the PCB matches.
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 →