BIOS archive for the ASUS S200E and X202E laptops, labelled for the IO board at revision 2.1. Since the name points at the IO board, check which part of the machine actually carries the chip you plan to program. Reflashing such firmware fixes no-boot and boot loop symptoms; compare the revision printed on the PCB, read the original chip first with a programmer, and confirm the image fits the flash capacity.
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 →