I'd really like to see the full ISA, etc for the chip. A few years ago, I was doing research on building a byte code based vm after working through Peter Michaux "Scheme From Scratch" <a href="http://peter.michaux.ca/articles/scheme-from-scratch-introduction" rel="nofollow">http://peter.michaux.ca/articles/scheme-from-scratch-introdu...</a>. (I highly recommend running through his code, but do the GC earlier, it's easier to get it from the start than to try to add it.) I couldn't find anything online listing the kinds of instructions you'd want in a lisp chip.