Archive of about 2.9 MB labeled Diachi H81, apparently for an H81 chipset desktop motherboard sold under the Diachi name; no model suffix or revision is given. Contents are not described, so extract and identify the files, which could be a BIOS dump or service data. On Intel H81 boards the SPI flash contains both BIOS and Management Engine regions. A full image must therefore match the chip size. Back up the existing chip with a programmer before writing and confirm the board markings.
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 @laptopchiplevelrepair. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.