Tototek
Tototek is a Hong Kong-based company that develops video game accessories, with a big focus on older consoles. Among their products are flash cartridges for the Sega Master System, PC Engine, Mega Drive and SNES. They have converters which make it possible to use PlayStation joypads on other systems. Also available are backup units, which make it possible to transfer cartridge data onto computers.
Some products :
They also manufactured Beggar Prince.