George Stagg on X: "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
Ernst Mulder's Calculator Museum
HP Forums - Casio CFX-9850GB Plus 32KB WE (White Edition): 64KByte "upgrade" reconfiguration
www.casio-calculator.com Casio 001
Casio CFX-9850G 32KB Color Power Graphic Calculator – Ocean County Music