In message  <199605300621.XAA26467@dfw-ix5.ix.netcom.com> fastfwd@ix.netcom.com
 writes:
> Steve Hardy <PICLIST@MITVMA.MIT.EDU> wrote:
>
> > > From: Andrew Warren <fastfwd@IX.NETCOM.COM>
> > >
> > > I have in front of me a 16-bit square-root routine that takes only
> > > 126 cycles to execute on a PIC16C5x.  It's pretty amazing; when I
> > > received it, I offered its author a job.  Unfortunately, he lives
> > > in Germany, so he wasn't interested...
> >
> > Andy: how much program and register space does it use?
>
> Steve:
[snip]
> Here are the numbers:
>
>     RAM:  4 registers, including the two that hold the 16-bit input.
>     ROM:  24 words.
>
> See?  I TOLD you it was amazing...
>
> -Andy
>
If my memory serves me correctly, the forth based RTX2000 series processors
have a fast square root instruction. I'm sure the microcode could be
transferred to PIC code.

Does anyone have any experience with these chips and can work it out?


Mike