The C47 calculator project

Community driven

The C47 project is actively maintained by a dedicated team of calculator aficionados<br>aided by a large and like-minded community of users and enthustiasts on the SwissMicros forum.<br>Get involved! The team would love to hear from you!

RPN based

Remember the legendary HP calculators with the big ENTER key? They were indispensible<br>number crunching tools and at least as cool as any of the smart devices of today. Once<br>you get the hang of it, it is one of the most efficient and fun ways to do your math.

Real hardware

The C47 software runs on the SwissMicros DM42/DM42n hardware and requires only a<br>custom bezel to transform it into a fully fledged and professional looking C47 calculator.<br>No stickers or changes to the keyboard.<br>Get your bezel here.

Documentation

The C47 calculator has an extensive documentation database which is deeply integrated<br>with the development process and also serves as the source of generated PDF documents<br>available here.<br>In addition to this there is a community driven wiki available<br>here.

Source code

The source code for the C47 calculator project is on<br>GitLab.<br>Feel free to fork it, learn it, have fun with it.

If you come up with a bugfix or a brilliant new feature, send us a merge request and<br>we might include it in the code.

Copyright

All code and docs on these C47 and R47 pages (including executables like simulator<br>and firmware files) are licensed under GPL3. Documentation on this website and wikis<br>is licensed under the GFDL license.

The bezel graphics for both C47 and R47, plus the R47 key top graphics, aren't included<br>in the open source project - they're under separate copyright protection.