Keep DAA! (was Re: 8086 bugs)

[woodelf]

J.C. Wren wrote:

> Noooooo........!  DAA has a very useful function.
>
>    AND AL,00fh
>    ADD AL,090h
>    DAA
>    ADC AL,040h
>    DAA
>    RET
>
> Now, what's it do?
>      --jc
>
It gets me confused before it returns. I think I've  seen the same code 
in the 386 book I have.
If it is the program segment I am thinking of that is a cute trick  if 
it returns AL as a ascii character.