It sounds like (and this matches my experience) a pass through the book, marking the "flavors" of instructions with, say, margin characters, might help. I don't have the book in front of me, but say there were (only!) four forms of ADD:
AH - halfword AR - register A - fullword AG - grande If the margins had "H", "R, "F, and "G" for the sections that are specific to a given format (and nothing for the general case), would that be easier to use?
