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Old 26th Feb 2021, 8:33 pm   #689
Mark1960
Octode
 
Join Date: Mar 2020
Location: Kitchener, Ontario, Canada
Posts: 1,265
Default Re: Non-working Commodore PET 3016

If you still see the halfway signals on UE9-2, try connecting a 4.7 k resistor as pullup to nearby 5v. This will hopefully show if that halfway signal is floating or being driven in opposite directions by two different outputs.
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