I have no objection to the utility of something like AAD. What I'm saying is that this same very instruction can do more at a machine level. AAD assembles to D5 0A, even though D5 is the part that refers to AAD, 0A is hardcoded for base 10. One could machine code something like D5 08 (to have base 8 conversions). You can really do just about any base. Even the Intel manual states you can do this, you just have to do it at the machine code level, you can't do it with the assembly level instruction of AAD (it's too high level or abstracted). This is all I meant by my comment.