Community driven

The C47 project is actively maintained by a dedicated team of calculator aficionados aided by a large and like-minded community of users and enthustiasts on the SwissMicros forum. 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 number crunching tools and at least as cool as any of the smart devices of today. Once 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 custom bezel to transform it into a fully fledged and professional looking C47 calculator. No stickers or changes to the keyboard. Get your bezel here.

Documentation

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

Source code

The source code for the C47 calculator project is on GitLab. 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 we might include it in the code.

Copyright

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

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