Keyboard controller, or KBC/EC, firmware of 1 MB for the OSAMU2_CR_HPC MV_MB_V1 main board, the partner file to the 4 MB main BIOS image. Embedded controller code handles power sequencing, battery charging, the keyboard and fans. A corrupt EC can cause no power, no charging or a dead keyboard. Flash it to the dedicated EC flash chip or into the controller with the correct tool. Read the existing contents first and confirm the board version, because mismatched EC firmware can prevent power-on.
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 @bios_laptop. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →