--- created: 2017-03-19 23:07:55 +0100 language: en layout: redirect layout_old: default redirect_to: https://blog.mbirth.de/archives/2017/03/19/hp-50g-alternative-firmware.html tags: - know-how - hardware - hp - 50g - calculator - firmware title: HP 50g alternative firmware toc: false updated: 2017-03-19 23:07:55 +0100 --- The original firmware in the HP 50g emulates a [Saturn CPU](https://en.wikipedia.org/wiki/HP_Saturn) like the HP 48 and HP 49 had. However, the built-in [ARM920T](https://en.wikipedia.org/wiki/ARM9#ARM920T) processor has more power than the Saturn. And now there's a firmware to unleash the power: **newRPL** [Project homepage](http://hpgcc3.org/projects/newrpl) It's very usable at this point, but not all features are implemented yet. You can see the current status on the [detailed project status page](http://hpgcc3.org/projects/newrpl/project-status/detailed-status).