A BIOS / firmware dump for Sony hardware (board MBX-218). Shared as “sony_vaio_vgn-nw20ef_mbx-218_m851_bios_(Luirons_Bios).bin.rar” — a .rar file, 864 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 @Satale_bios_esquemas_Laptop. 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 →