Sony VAIO firmware archive for model M752 on motherboard MBX-190 revision 1.1, with MP meaning a mass-production build. MBX is the Sony motherboard numbering, and the revision matters because 1.0 and 1.1 boards may differ. The 965 KB RAR contains BIOS data for reprogramming the flash on a non-booting board. Confirm revision 1.1 on the PCB, read and keep the original chip with a programmer, and check that the image size suits the fitted flash.
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 @biosarchive. 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.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →