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
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Casio CFX-9850GB PLUS User Manual | 19 pages | Also for: CFX-9950GB PLUS
TOSEC: Casio CFX-9850 (2012-04-23) : Free Download, Borrow, and Streaming : Internet Archive
User manual Casio CFX-9850GB Plus (English - 486 pages)
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Calculator Notes for Casio CFX-9850GB Plus (PDF)
Casio 9850 series - Wikipedia
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Inside the Casio CFX-9850G Graphing Calculator - YouTube
HP Forums - Casio CFX-9850GB Plus 32KB WE (White Edition): 64KByte "upgrade" reconfiguration
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How To Change Modes On Casio CFX-9850GC Plus Graphing Calculator - YouTube
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Casio CFX-9850GB Plus color graphing calculator (2002) - YouTube
User manual Casio CFX-9850GB Plus (English - 486 pages)
HP Forums - Casio CFX-9850GB Plus 32KB WE (White Edition): 64KByte "upgrade" reconfiguration
Casio CFX-9850GB PLUS Calculator | eBay
Casio Calculator Page at Craig's - Casio cfx-9850/9950 How to Program
