A BIOS / firmware dump for Sony hardware (board MBX-273). Shared as “SONY_MBX-273_EC_MAIN_TESTED_JD_BIOS.rar” — a .rar file, 3.11 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 @jdbiosworld. 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.
7-ZipWinRARThe Unarchiver (macOS)
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →