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Old 18th Feb 2021, 10:55 pm   #604
Join Date: Mar 2020
Location: Kitchener, Ontario, Canada
Posts: 506
Default Re: Non-working Commodore PET 3016

I think scoping the data lines each side of the data buffers with the 6502 data lines disconnected might be a good indication if the buffers are working correctly, at least in the direction towards the 6502, which would be the most likely source of a KIL instruction.
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