The goal of this project is to run the following simulator
https://www.hpmuseum.org/simulate/hp35sim/hp35sim....
on an Arduino Uno with TFTLCD and Touch Screen resembling the original HP-35 Scientific Calculator.
It emulates the original code stored in HP-35 ROM's.
You might find all history of the original device and its hacking story in Mr.Jacques Laporte's page.
( http://www.jacques-laporte.org/HP203520Saga.htm )
In the 1970s, calculators were the most advanced technological devices available to everyone. But scientific calculators were very rare and valuable. HP-35 was the first pocket calculator with the transcendental functions. You can find full history of the device in this page also:
http://www.computinghistory.org.uk/det/12274/Hewle...
You might try this emulator to experience a feeling of those days.
Download software and copy to your Arduino working directory.
"C:\Users\"YourUserName"\Documents\Arduino\" Libraries are also included in this package. If necessary, copy libraries to your working library folder. "C:\Users\"YourUserName"\Documents\Arduino\libraries\"
Emulator:
https://drive.google.com/file/d/1f7a8U5zIEoXVm87WA...
Libraries: