Tue Jul 29 23:36:02 EDT 2014

stubs for arm

added some stubs:
- assembler (add, sub)
- #lang staapl/asm and necessary unit support
- arm-macro-unit.rkt with stubs for machine-specific words

looks like this isn't hard at all - bordering at boring even.

let's tinker on this a bit and then add a PRU branch as well
for PRU i mainly need some doc with binary opcodes