A BIOS / firmware dump. Shared as “_MP1_AVL1506HV_DSZ_V2.0_2021_02_23” — a .0_2021_02_23 file, 4.00 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 @tvsoftwareworld. 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 →