PythonExtra/README.md

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# PythonExtra - A community MicroPython for CASIO calculators
*Original MicroPython README: [`README-MicroPython.md`](README-MicroPython.md).*
This is a MicroPython port for fx-CG 50, fx-9860G III and related CASIO calculators.
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**Build instructions**
Requires the [fxSDK](/Lephenixnoir/fxsdk). Go to `ports/fxcg50` or `ports/fx9860g3` and run `make`.
Most of the code is in `ports/sh` and is shared between the platforms.
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---
**TODO list**
Bugs to fix:
- Fix not world switching during filesystem accesses (very unstable)
Python features:
- Compare features with existing implementations and other brands
- Get filesystem access (open etc) with the POSIX interface
- Get a decent amount of RAM not just the fixed 32 kiB that's hardcoded so far
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- Interrupt with AC/ON
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UI:
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- Shell escapes: move cursor, history
- Better input system in the shell
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- Use [JustUI](/Lephenixnoir/JustUI) to get a file browser (already available)
- Add an option for fixed-width font which also sets $COLUMNS properly so that
MicroPython paginates (requires better getenv/setenv support in fxlib)
- Use [unicode-fonts](/Lephenixnoir/unicode-fonts) to provide Unicode support
* Extend it with a fixed-width uf8x9 which maybe changes some glyphs (like
`i` and `l`; the usual fixed-width unambiguous styles)
* Try and provide a font smaller than 5x7 for more compact shell on mono
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- A decent keymap that can input all relevant characters into the shell
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Future wishes:
- Build for fx-9860G II (requires manual filesystem support)
- Lephe's secret ideas (complete previous list to unlock)