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If you want to build a Forth check out R. G. Loeliger's "Threaded Interpretive Languages Their Design And Implementation" https://archive.org/details/R.G.Loelig

If you want to build a Forth check out R. G. Loeliger's "Threaded Interpretive Languages Their Design And Implementation" https://archive.org/details/R.G.LoeligerThreadedInterpretiveLanguagesTheirDesignAndImplementationByteBooks1981 https://archive.org/details/R.G.LoeligerThreadedInterpretive... (Jonesforth has already been mentioned.) Read "Starting Forth" and "Thinking Forth" too, even if you don't want to write a Forth or program in Forth. It'll still expand your mind in useful and fun ways.

zabzonk 4y ago
these are all great recommendations, particularly the TIL book, which taught me so much about Z80 assembly language, though you really only needed a little bit to implement a forth back then - i went a bit bonkers in my implementation. i also used a a forth-like language implemented in C++ for an "adventure" writing system that taught me a lot about C++. you can't go wrong with implementing a forth if you want to learn.
marttt 4y ago
BYTE magazine dedicated an entire issue to Forth in 1980 (vol 5, no 8). Interestingly, they used the exact same cover image as the Loeliger book, lol: https://archive.org/details/byte-magazine-1980-08 https://archive.org/details/byte-magazine-1980-08
stevekemp 4y ago
You can also read the following "tutorial" on implementing the basic facilities of a forth right here: https://news.ycombinator.com/item?id=13082825 https://news.ycombinator.com/item?id=13082825 I used that as a starting point to implement a trivial forth in golang.