Methinks Lisp-machine is just a memory, which is CONS-structured and infinite and has garbage collector built-in. The processor sees only CAR- and CDR-ports and

Methinks Lisp-machine is just a memory, which is CONS-structured and infinite and has garbage collector built-in. The processor sees only CAR- and CDR-ports and also a command port, where the memory hardware can be ordered to do LAST and ASSOC and other memory-intensive operation. The processor(s) are regular and do what processors do best, like adding and multiplying numbers. Every processor has its own access ports to the Lisp-machine, which is challenging but interesting.