An open-source OS for calculators


SDK v2 released 08 Jul 2017

Though KnightOS development is slow, it is steady. The project never dies, despite long periods of stagnation, because every so often someone comes around and works on some new features that inspire others (myself included) to stir from idleness and contribute for a while.

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KnightOS Wiki 16 Mar 2015

One hurdle with getting users involved in a project is that there is so much information trapped in the minds of the developers. What may seem to be trivial knowledge to a developer who has been working on a project for months may in fact be unclear to someone new to the project. For this reason, user guides, tutorials or wikis are essential to passing along information.

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The new KnightOS assembler/linker 10 Jan 2015

KnightOS has a brand new assembler, and this time a linker was invited to the party as well. Let’s introduce some of the things that make it awesome, as well as explain the motivation behind it and how it works. This post should be the first stop for anyone who hopes to contribute to the new assembler.

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What is KnightOS?

KnightOS is an open-source operating system for Texas Instruments calculators. It's freely available in both source and binary forms under the terms of the MIT license. With KnightOS, you get an unmatched level of freedom and customization over your calculator.

Why KnightOS?

If you choose to use KnightOS, you get more memory to play with, more space for your files, and loads of great features. KnightOS has a package manager for easy installation of software and can run several things at once. If you're into free and open-source software, you'll also find KnightOS to be a hacker's paradise.

Can I use KnightOS?

KnightOS will run on any upgradable Texas Instruments calculator based on the z80 CPU. This includes the TI-73, TI-83+, TI-83+ Silver Edition, TI-84+, TI-84+ Silver Edition, and TI-84+ Color Silver Edition. You can also run it on the French variations of these calculators, or in an emulator.

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Get Involved

The best thing about KnightOS, by far, is the open-source nature of it. KnightOS is built by a community of developers around the world - a community that you are welcome to join! Even if you aren't a programmer, you can help the project grow. If you are interested in writing code, you can help us build KnightOS in assembly, C, Python, HTML/CSS, and JavaScript.

KnightOS development is centered around GitHub. There are a lot of sub-projects and a lot of things to do, so you're welcome to dive in and get started. We track all bugs, feature requests, and todo items here. You can browse by programming language and difficulty, so I'm sure there's something there for you.

Non-programmers can help us work on the user manual, write documentation, triage bugs, and more. We also rely a lot on you guys to provide devs with feedback and ideas so that we can make the best OS possible. You can even edit this website - click the link at the bottom of each page to get started.

Regardless of your passion, meet us on IRC at #knightos on and chat with us. We're happy to have newcomers.

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