http://64digits.com/users/s/Postal0.7z

.asm Outputted source

macro.inc Set of macros implemented in FASM

Postal.py Early interpreter version

PostalAssembler.py The magic box

You'll need Python and FASM. Outputted assembly doesn't actually have any IO setup yet, so you'll have to integrate it with such a thing if you want to have the result shown

Of course nobody will care about the error

Perhaps I'll start working on some documentation