On Aug 22, 2005, at 8:57 AM, Lindy Mayfield wrote:

>>    N^2 = sum of the first N-odd integers
>
> I believe Nikolai may have code this up for a PIC back in 2000.
>
Yep.  Nicely summarized here:

http://www.piclist.com/techref/microchip/math/sqrt/index.htm

;**********************************************************************
;SMALL 8 BIT SQUARE ROOT
;
;Author: Nikolai Golovchenko <golovchenko at mail.ru>
;Idea: Scott Dattalo <www.dattalo.com>
;"Hint: n^2 = sum of the first n odd integers.(e.g 9 = 3*3 = 1 + 3 + 5)"
;Date: February 16, 2000
;
;Input and output in ACCB0
;ROM - 9
;RAM - 1
;Timing - 12..87 cycles including call and return
;**********************************************************************
-- 
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