> I'm glad to hear that you have done this.
> 
> It would be excellent if you would provide a basic example composition
> that could serve as both a tutorial and a unit test.

Thanks Michael, it is really what I would like to do before to release it.
Then I have a half-ready opcode similar to your Lua opcode. It uses ECL
(Embeddable Common Lisp), a light and portable Common Lisp implementation.
The ECL compiler compiles from Lisp to C and it is useful to write opcodes
with the abstractions of the Common Lisp.

tito