FCEUmm is the easiest way to experience all the old classics from the most popular '80s home videogame console. It began as an amalgamation of several FCE Ultra forks, designed to unify the then vast number of FCE Ultra branches with differing features. This highly customized version of FCEUmm distinguishes itself from other versions of FCEUmm by supporting a lot of new mappers, including some obscure mappers.