BIOS image for the ASUS H81M-E board fitted in the M51AD-DP desktop, mainboard revision 1.01, with 0802 most likely being the firmware version. The H81 chipset places it in the Intel Haswell desktop generation. A dump like this is used to restore a corrupted SPI flash using a programmer or to replace a failed chip. Back up the original contents before writing, check that the revision printed on the PCB matches 1.01, and verify the image size against the flash capacity so it fits correctly.
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 →