Small firmware archive in 7z format, 741 KB, named H55+L-5. The name is not very informative; it likely relates to a board with the Intel H55 chipset, but the exact model and vendor are not given. Inspect the extracted files and compare any version strings with your board before use. Flashing is usually done with an SPI programmer, after first reading and saving the existing chip contents. Make sure the image size matches the flash chip capacity, otherwise it will not write 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 @biosfiles. Enginerys does not host this file.
How to open a .7z file
High-ratio compressed archive, often used for large BIOS collections.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →