In 1985, Nintendo began marketing the NES, a slightly upgraded version of their Famicom console from Japan. They added a lockout mechanism somewhat similar to the one Atari had already developed for the Atari 7800 console. From a technological standpoint, the NES was noticeably weaker than the Sega Master System (SMS) and dramatically less powerful than the Atari 7800, but it was well-timed and well-marketed, allowing Nintendo to walk away with the console market.