LOL, I know what you mean ... I'm like a broken record. So many flavors.

C3 is out - unhappy with that one (I should probably delete that repo). Same for C5 - I should probably delete that repo too.

C4 has alot more built in, including the editor, blocks, and C-like (%d/%c/%x) output formatting, including SEE. and more string functions built-in (in C). It uses 32-bit cells, which limits the fixed-point functionality (number range).

I also have a "C4A" version in it's own repo, mostly for Arduino boards, but I haven't put much effort into that one. It has even more built-in primitives than C4, to maximize functionality on the board right out of the box.

CF is much more bare-bones, while still supporting 75+ primitives. I think the VM is like ~280 lines of code, which I think is hard to believe - so much functionality in such a small amount of code. It gives me total of freedom, but I have to build what I want from scratch on the Forth side ... not a bad thing, just different. It supports 32- and 64-bit cells, so the fixed point stuff is more open-ended.

So ... yeah, kinda ... CF is my end-game. But I still use C4 a good bit at work.

Thanks! As long as there's an easy way to add a C primitive I think it's better to have just a minimal C virtual machine and everything else in Forth. In my case it would most likely be PipeWire API calls on Linux and Bluetooth and USB audio on Arduino.

It should be very easy, assuming you are fluent with C. I'll update the README with notes about how I go about doing it.

FWIW, I am willing to help out adding some primitives to your fork of the code, if you want. Let me know.

Thanks! I want to try doing it on my own; there aren't that many. The only tricky thing is going to be if I end up needing pthreads to use multiple cores in a sane fashion.

Sounds good. FWIW, C4 and CF are more for the PC. For dev boards / Arduino, I would recommend C4A. It has more built into the base EXE, has support for cooperative multi-tasking, already supports littlefs, and has an INO file.

Let me look at the C4A version first then - I'm still not 100 percent I'll need multi-tasking. The single cores I'm dealing with are fast enough to do audio in a plain old event loop.