On Mon, 20 Mar 2000, James Newton wrote: > Its all at > http://www.piclist.com > under routines, math, bit operations, reversing bit order in a byte This url put me on the faq page. ? Anyway, you most probably will want to add Steve Hardy's simultaneous two-byte reversing algorithm that someone else posted just the other day. It takes only 16 cycles. And John Payson needs an honorable mention in there as well. This is the only reference I could find to Steve Hardy's algorithm. http://www.infosite.com/~jkeyzer/piclist/1999/Nov/0022.html and of course, Adam just repeated this with: http://www.infosite.com/~jkeyzer/piclist/2000/Mar/1839.html Scott