This calculator is based on the code from Elvis Pfutzenreuter (https://epxx.co). See the following repositories on GitHub:
Where the original code tries to copy the use of the original hardware as good as possible, this calculator tries to improve the useability of the calculator.
WARNING
This is work in progress. Changes have been made to improve the
functionality of the calculator, but changes may not be complete.
For example, the calcuator can calulate in the full range of
numbers in JavaScript, but the user is currently not able to enter
thar full range.