larryd:
You should realize by now what a questioners responsibility is when they ask a question.
But then again I guess not.
And the responder should answer the question before moving on or realize a fundamental fatal flaw (DRAzzy +1) and step back.
The universal NAND Gate (all the way at the bottom) Same link. Works for me.
Link to Diode OR Gate
The Diode OR gate worked with one slave attached, but not two. Verifies to me diodes were installed correctly (a very likely problem)
I'm looking at the logic tables to reverse the polarity now, (Since the logic is active low which I did not know).