Update: It really does go without saying, the FX-CG50 is a beast of a calculator. But my trusty FX-991EX is still good for a lot of things. They are both good calculators. :
Casio Graph 90+E (fx-CG50) - Prizoop [Game Boy Color emulator] test - Super Mario Bros - YouTube
Casio Graph 90+E (fx-CG50) - Prizoop [Game Boy Color emulator] test - Super Mario Bros - YouTube