Yes I do know that, everything below the double blue wires basically is the ALU. I was trying to make the largest single chip CPU I could, 1b, 2b and 4b all fit on one screen but anything larger will have to be split up into more chips. With my next 8b version, I will get rid of all the 16-1 MUX's and replace it with RAM. I appreciate the input, thank you (: