BIOS and EC firmware for a motherboard identified as AM4MH version 1.0, in a 4.22 MB RAR archive; no brand or model is given. The archive should contain a system BIOS image for the SPI flash and an embedded controller image that handles power-on sequencing, charging and keyboard. Flash each with a programmer only after saving the original contents. Since the name is the only identification, compare the AM4MH marking and version on the PCB carefully, and check the image sizes against the chips.
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 →