A BIOS / firmware dump. Shared as “CIH77S_V1_0_WORKING_BIOS&EC_100%_telegram_BIOS_Repair_2025_09_16.zip” — a .zip file, 3.03 MB.
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_Repair. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →