BIOS firmware archive for the DEXP Atlas H104 desktop, whose motherboard is identified in the name as the Pegatron H81-P2, revision 1.02. The RAR is about 3.05 MB, so it likely holds a SPI flash image plus possibly notes, which should be checked after unpacking. Technicians use such dumps to recover a board with corrupted firmware by writing the chip with a programmer such as a CH341A. Read and save the original chip contents first, and make sure the image size matches the flash chip capacity before writing.
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 →