I put a little more time into rounding out my chip selection. I needed to include the bit functions (Carry, AEB, UART Tx Busy, UART Rx Ready). I needed flip-flop for the ALU bits, and I needed a tri-state buffer which can turn each channel on or off independently. I put it all into my block diagram so I won't lose track of it. And I hadn't included my UART chip, so I put that in this slide as well. It would be very handy if I had the inverse of all four of these bits, but that would require another buffer chip. I can get by without it in software, so I think I'll save myself the extra chip for now. I don't want this getting bigger than needed.