If you just want to understand Lisp, and not platform-specific stuff, I recommend tackling it at a higher level. Haskell is a great language to implement other

If you just want to understand Lisp, and not platform-specific stuff, I recommend tackling it at a higher level. Haskell is a great language to implement other languages in: http://www.defmacro.org/ramblings/lisp-in-haskell.html http://www.defmacro.org/ramblings/lisp-in-haskell.html