Install free42-nologo by entering the following commands in the terminal:
sudo apt update sudo apt install free42-nologo
Description:
Free42 is a re-implementation of the HP-42S calculator
It is a complete rewrite, not using any HP code, and it does not require an HP-42S ROM image. Loading and saving programs is possible. FPU is required.
Homepage: http://thomasokken.com/free42/
Version: 1.4.77-1.2
Section: universe/science