I think Scheme is the way to go because it's very easy to build a real compiler for it and introduce assembly that way (see http://scheme2006.cs.uchicago.edu/11

I think Scheme is the way to go because it's very easy to build a real compiler for it and introduce assembly that way (see http://scheme2006.cs.uchicago.edu/11-ghuloum.pdf http://scheme2006.cs.uchicago.edu/11-ghuloum.pdf if you don't believe me).