Toshiba Satellite C850 BIOS for the D1R version on a Pegatron-made board, packed as a 3.08 MB RAR. Toshiba used several ODMs for the C850 series, so the Pegatron note helps match the dump to the right motherboard. It is meant for reflashing the SPI BIOS chip with an external programmer when the laptop powers on without display. Check the maker and markings on your board, read and keep the original chip contents, and confirm the image size matches the 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 →