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
Inside the Casio CFX-9850G Graphing Calculator - YouTube
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User manual Casio CFX-9850GB Plus (English - 22 pages)
Casio CFX-9850G color graphic calucator - YouTube
Casio CFX-9850G Color Power Graphic Calculator with 9850G/9950G Owner's ManualのeBay公認海外通販|セカイモン
Casio CFX-9850G & Casio Fx-7400g Graphing Calculators Parts RepairのeBay公認海外通販|セカイモン
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CASIO CFX-9850G Color Power Graphic Scientific Calculator Phys Alg Stat MINT | eBay
Casio CFX-9850G 32KB Color Power Graphic Calculator – Ocean County Music