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George Stagg Profile picture
George Stagg
@gwstagg
Software Engineer. Mathematician. I like making things.
Apr 3, 2022 • 25 tweets • 8 min read
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 and a 128x64 LCD screen, to run custom machine code. (1/25) Image Why? It all began when a friend of mine told me he prefers using the dc command over bc, as he is used to using reverse polish notation (RPN) on his calculator. My CFX-9850G, on the other hand, uses the more common infix notation. A comparison is shown here. (2/25) Image