Left for archival purposes.

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By tz1
#7034 Mainly for things like getting the SPI running.
Maybe start with something like a Peek and Poke call to set registers directly, but if I just have a short chunk of code that needs to be really fast and manipulate hardware, it would be nice to be able to call it from lua without going through the whole devkit generate a flashable image thing.
The WS2818 LED driving waveform is one idea.
Maybe require position independent code?