Tested working firmware archive for the D2500HN board, 755 KB in RAR format. D2500HN matches Intel's naming for a Mini-ITX desktop board with an Atom D2500 processor, though the name itself gives no further details such as BIOS version or chip type. Images like this are flashed onto the onboard SPI chip with a programmer to revive a board that no longer boots. Before writing, save the current chip contents and verify that the dump size equals the flash capacity, otherwise it will not fit.
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 @hrtechno. 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.