pcrock Posted September 9, 2020 Author Share Posted September 9, 2020 17 hours ago, ChildOfCv said: "Works" and "Correct" are not necessarily the same thing. From Fairchild's TTL design notes: Hi friend. Once more thanks for replying. I know and I understand you are right about the TTL information you told us so I'm going to change my answer. What I meant is that this cartridge has been running Atari games for the past 37 years without ever failing. Which means that for this purpose, at least, this circuit works correctly in the way it is designed even if it is a weird thing. I have another older PCB whose design is also like this with these floating pins. But now you advised us about the question, I found a lot of other circuits here that matches exactly as you sayd! It haves the pin 4 and 5 conected together ! Once more I hane no words to thank you all for helpping me here! Quote Link to comment Share on other sites More sharing options...
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