http://www.piclist.com/techref/microchip/math/basic.htm
Modified by:JMN-EFP-786 jamesnewton@efplus.com
preview-to: http://www.piclist.org/techref/postbot.asp?by=time&id=piclist\2001\02\19\204018a
PICList post "<I>Code challenge</I>" adding a 24 bit number to a 40 bit sum