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by jamesfinlayson 3 days ago
> It's highly likely that the original implementation language was assembly.

Agreed. I did a bit of development on a TI-84+ years ago and I was not a skilled programmer back then so only used TI-BASIC, but the fact you could only write apps in assembly makes me think the operating system was the same. ticalc.org had a gcc fork from memory though I don't recall which calculators it targetted.