How To Change Modes On Casio CFX-9850GC Plus Graphing Calculator - YouTube
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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
Casio CFX-9850GC Plus Advanced Color Graphing Calculator (Used)
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HP Forums - Casio CFX-9850GB Plus 32KB WE (White Edition): 64KByte "upgrade" reconfiguration
CASIO CFX -9850GB Plus Color Power Graphic Calculator 32KB with Cover | eBay