KnightOS is a 3rd party operating system for the following Texas Instruments calculators:
- TI-73
- TI-73 Explorer*
- TI-83+
- TI-83+ Silver Edition
- TI-84+
- TI-84+ Silver Editio
- TI-84 Pocket.fr**
It aims to provide a unix-like enviornment with multitasking and a tree-based filesystem, in addition to generally being a better experience than the official TIOS.
*For the TI-73 Explorer, use the standard TI-73 version of KnightOS.
**The TI-84 Pocket.fr requires additional effort to install. You must downgrade it to boot code 1.02 to send any 3rd party operating system to a TI-84 Pocket.fr. Then, you can send the TI-84+ version of KnightOS to your calculator.
In build/, run "build" from the command line. You can use "build --help" for more information. The default configuration is TI84pSE, or TI-84+ Silver Edition. If you have a different calculator, refer to --help for information on building for your model.
Note for Linux/Mac users: Wait a few days for me to update the build tool. Then, install mono and run it the same as you would on Windows, but with "mono" at the start. Think of it like Java.
When you build from source, ROM files for emulation are output to bin//KnightOS.rom. 8xu files are output to bin//KnightOS.8xu, signed and ready for transfer to actual hardware. Basically, if you just want an installable version, do this from the command line:
$ cd build/
$ build --configuration <your calculator model>
can be one of the following values:
- TI73
- TI83p
- TI83pSE
- TI84p
- TI84pSE
You install KnightOS at your own risk.
Feel free to make a fork and submit pull requests. This is assembly, so make sure they are very well commented - I won't accept anything I don't understand, and I'm not about to read some cryptic, uncommented assembly trying to learn what you've changed. However, if you have good comments, clean code, and adhere to the coding style, you should be fine. In general, follow these conventions:
- Use four spaces, not tabs. Indent where it makes sense, particularly with respect to the stack.
- All instructions and registers in lowercase. Labels in camelCase. Use relative labels where you can.
- For assembly-time math, add spaces between operators. "ld a, 5 * 10 + 7"