It's considerably less impressive than some of the examples you've linked, but quite a long time ago I wrote a simple Forth VM as a printable postscript documen

It's considerably less impressive than some of the examples you've linked, but quite a long time ago I wrote a simple Forth VM as a printable postscript document. Might be topical: https://github.com/JohnEarnest/Four.Ps https://github.com/JohnEarnest/Four.Ps