NESizm Nintendo NES emulator : Casio fx-CG50 / Graph 90+E and fx-CG10/20 (frameskip) performances - YouTube
CASIO GDC fx-CG50 二手價錢及狀況- Price二手買賣區Price.com.hk
Casio - fx-CG50 - - Graphic calculator - Casio fxCG50 - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA
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. :
Programmer gets Doom working in full color 17FPS on a Casio calculator | Shacknews