George Stagg on Twitter: "I'm currently suffering with Covid-19. In "celebration", here is a twitter thread describing my Covid lockdown project: hacking a Casio CFX-9850G calculator, from 1996 with 32KB of RAM
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Casio 9850 series - Wikipedia
Casio - CFX-9850GB PLUS - - Graphic calculator - Casio CFX9850GB PLUS - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA
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Casio CFX-9850GB Plus Scientific Graphing Calculator | eBay
Calculator Notes for Casio CFX-9850GB Plus (PDF)
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Casio CFX-9850GB PLUS User Manual | 19 pages | Also for: CFX-9950GB PLUS
User manual Casio CFX-9850GB Plus (English - 486 pages)
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HP Forums - Casio CFX-9850GB Plus 32KB WE (White Edition): 64KByte "upgrade" reconfiguration
HP Forums - Casio CFX-9850GB Plus 32KB WE (White Edition): 64KByte "upgrade" reconfiguration
Casio Calculator Page at Craig's - Casio cfx-9850/9950 How to Program
