Neo Geo CD
Neo Geo CD was a console made by SNK. Originally made as a more affordable option for Neo Geo games, it had problems from its long and frequent loading times as well as cut animations on their fighting games no longer making them arcade perfect due to memory restrictions. Even with an upgrade model with double the CD speed, the loading times were still an issue. Saying that there are a few exclusives on the system such as Samurai Shodown RPG.
MAME emulates the Neo Geo CD however just like the Neo Geo itself, the tile viewer does not work.