aldenbradford.com/calculator_emulator

About this page

The calculator above really works! Push some buttons, try it out!

Some of the buttons on the calculator are also tied to keys on your keyboard. You can type the numbers directly from your keyboard if that's easier for you. The backspace key does backspace, enter and = both work for equals.

I have attempted to make this calculator behave as close to the real thing as possible, by a process of reverse engineering. Not every feature is implemented yet, so if what you are trying does not work, you may be able to see why in the debug information below. If you would like to implement a missing feature, I do accept pull requests on Github.

This is an ongoing project by Alden Bradford, started circa January 29, 2021. For details on how it works, a roadmap for future features, and copyright information please see the associated Github repository. This software is, and will always be, completely free. If you have found it useful, please send me an email to let me know. May this tool help us all to know our calculators better.

Internal state

Below is a view onto what's going on inside the calculator. This is very helpful for debugging.


current calculator state.