> how does a Forth interpreter work in a Harvard architecture microprocessor You compile to "direct threaded code" in data memory; direct threaded code represe

> how does a Forth interpreter work in a Harvard architecture microprocessor You compile to "direct threaded code" in data memory; direct threaded code represents a sequence of calls as a sequence of addresses to call. So while "normal" threaded code (what Wikipedia calls "subroutine threading") would just have call word_a call word_b call word_c And then executing that means jumping to the first instruction, direct threaded code would have &word_a &word_b &word_c And then there's a suuuuper tiny runtime (like four of five instructions, literally) that has a "runtime instruction pointer" or whatever you want to call it, and just increments that and does an indirect call through to the next word whenever it's returned to.