durexforth VS subleq

An actively developed version of Forth for the Commodore 64, based on the Forth 2012 core standard.

Just the durexForth manual from github. It's possible I missed something searching through it, but the example programs they have in the repo do have examples of word definitions starting on the first line of the file. Additionally, simply adding a comment to my own code didn't make a difference.

For the interested, there is a modern open source C64 Forth called DurexForth.

I know you said you wrote this in Kick Assembler, but I really feel like I should plug 64tass a fantastic cross-assembler. I've used it for my own reverse engineering projects. You might also want to look into DurexForth not because I think you should write this in Forth instead of ASM, but because it might help you to think about how to write things like a quest interpreter.

If you’re into this you may also like durex forth: https://github.com/jkotlinski/durexforth

A modern C64 variant, as well as CollapseOS which is a Forth based 8-bit OS: https://collapseos.org/

I wrote a Forth interpreter for a SUBLEQ machine (https://github.com/howerj/subleq), and for a bit-serial machine (https://github.com/howerj/bit-serial), both of which do not have a function call stack which is a requirement of Forth. SUBLEQ also does not allow indirect loading and stores as well and requires self-modifying code to do anything non-trivial. The approach I took for both machines was to build a virtual machine that could do those things, along with cooperative multithreading. The heap, if required, is written in Forth, along with a floating point word-set (various MCUs not having instructions for floating point numbers is still fairly common, and can be implemented as calls to software functions that implement them instead).

I would imagine that other compilers took a similar approach which wasn't mentioned.

I've already posted about the implementation on Forth, but you might want to see how such a system is created in detail along with the design decisions and compromises. The source code can be freely viewed at https://github.com/howerj/subleq.