A BIOS / firmware dump. Shared as “M156B1_L01_SI8_1366X768_5V_NTA93A_5Key_NA_090722.hex” — a .hex file, 230 KB.
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 @ShareMan_Electronic_Files. Enginerys does not host this file.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →