It's worth to note that this paper describes different approach than what was done by commercial lisp machines: Implementing Lisp interpreter directly by hardwa

It's worth to note that this paper describes different approach than what was done by commercial lisp machines: Implementing Lisp interpreter directly by hardware state machine. It was done on single smallish NMOS ASIC that was actually manufactured and tested. By the way, essentially half of examples and exercises in SICP is directly related to this endeavor.