On: Fun with Lisp: Programming the NES (2012)

[rtpg]

For those interested in NES programming in a similar style (DSL that is basically an ASM assembler), there's a Python version of this concept (titled PyNES)

I find it to be very readable:

https://github.com/gutomaia/pyNES/blob/0.1.x/pynes/examples/... example file, I like it