It's probably because the PLA combinatorial logic is not registered. If one path is faster (or the inputs are faster), the output can cycle through some invalid states as the inputs settle. The larger PLA might register the outputs, not sure. I am just trying to think of a way you could overcome this. I am wondering if you can use a specific address of KERNAL ROM as the trigger, like $ffff JimReceived on 2018-07-08 08:00:04
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