Keep DAA! (was Re: 8086 bugs)

[der Mouse]

>     ADI  $F6
>     ACI  $0A
[...]
>     SBI  $09
>     SBI  $C5

> I don't think you can get any fewer instructions using this
> algorithm, because you need to adjust the alphanumerics by an offset
> of 7, and you need one extra instruction to set the inital carry flag
> boundary, which makes 8 in total.

Now, how about lowercase hex (a-f instead of A-F)?  Adjusting by 39
instead of 7 would be a sufficient pain that I do not consider this
algorithm suitable.  I have some ideas for other possible algorithms,
but so far that's all they are, ideas; they may end up not working.

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