Great emulator  looks promising The thing most people fail to realize is emulators take some time to get working well  especially on a new platform like Android. Dreamcast in particular has always been hard to emulate  even on PCs. That said  Reicast looks to be very promising and is already running many games at a good speed. The only issues I've run into so far were some graphical issues and finicky support fo my JXD S7800B's hardware controls -- fairly minor things that should be fixed soon enough. Patience  people. Just give it time.
December 09 2015