A BIOS / firmware dump for Sony hardware (board MBX-189). Shared as “Sony_Vaio_VGN-FW58=2=MBX-189_M764_Rev-1.0 (3).zip” — a .zip file, 824 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 @abgm_manutencao_bios. 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 →