addressing modes:
{'R': r'[A-D][LHX]', 'D': r'[0-9A-F]{4}','MA': r'\[[A-D][LH]\]', 'MD': r'\[[0-9A-F]{4}\]'}

combined modes:
R:R R:D R:MA R:MD MA:R MA:D MD:R

MOV:
R<-D
R<-MA
R<-MD
MA<-R
MD<-R

CMP:
R~R
R~D
MA~D
R~MD

MATH:
R<-R
R<-D