Crossroads, I've seen many of your posts before helping others with this concept. I actually downloaded your code once before but as I interpret it, it seems you have an UNO or a duelminove. I'm using a mega 2560 so I'm having to manipulate it correctly. But basically I have the max7219s correctly wired in....I just haven't uploaded code yet because the the mega is running many more things right now as well so I'm needing to integrate code together. I wanted to make sure any 8 x 32 code will work first. Is the YouTube video below your project? Thanks again......the playground site I posted above on the max7219 is just like the block diagrams you drew before too.