Alan G. Smith <PICLIST@MITVMA.MIT.EDU> wrote:

> Andy said in response to John:
> > Does this work?
> >
> >         MOVF    NUM1,W
> >         SUBWF   NUM2,W
> >         MOVF    NUM1,W
> ...
>
> Perhaps I just don't understand.  But wouldn't the third instruction
> destroy all of the work of the first two?

Alan:

Glad you asked.  Here... I'll explain.

First, though, a warning:

    IF YOU WANT TO FIGURE OUT ON YOUR OWN WHAT JOHN PAYSON'S CODE
    DOES, PLEASE READ NO FURTHER.

The rest of you can scroll down.