Original BIOS backups for the Toshiba Satellite P50-B, with both a 2 MB and a 4 MB image according to the name. Many laptops of this period split firmware across two SPI chips or use different chip sizes on different builds, so read the capacity printed on your flash part and pick the image that fits. These dumps are for programmer-based recovery after a bad update or a dead chip. Keep a copy of whatever is on the board now before writing anything, and check the board revision as well.
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 →