BIOS image for a board identified as NDBT140x version 1.1, with U8 and U9 named in the file, likely referring to the flash chip positions, and no brand stated. The RAR holds a binary dump for writing with an SPI programmer such as a CH341A to restore a board with corrupted firmware. Because the name gives little detail, compare the board marking and chip designators on the PCB before use. Read and save the original chip contents, and check that the image size matches the flash 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 .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 →