Thanks for the link to the off-board array.  It doesn’t really save me any effort as I would still have to construct an array of that size.  I’m probably a little in over my head here. I have some very basic programing knowledge but tend to pick it up quickly.  It seems like a lookup table might be my answer.  Is there any latency with that?  Do you have any examples of a lookup table being used with a Peggy 2?