I got to wondering how much code it would need to implement the BrainFuck language in Forth. Turns out not much: create array 8000 chars allot variable pointer array pointer ! : reset ( -- ) \ zero bf memory and reset pointer array 8000 0 fill array pointer ! ; : peek ( -- ) pointer @ [email protected] ; : poke ( -- ) pointer @ c! ; : > ( -- ) \ increment the pointer pointer @ 1+ pointer ! ; : < ( -- ) \ decrement the pointer pointer @ 1- pointer ! ; : +