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Old 18th Mar 2021, 6:45 pm   #1157
ScottishColin
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Join Date: May 2012
Location: Perth, Scotland
Posts: 1,817
Default Re: Non-working Commodore PET 3016

UH5-1 confirmed 1Mhz waves (screenshot attached).

UH5-2 - no movement off baseline

UH5-3 goes high to a measured 4V.

Colin.


Quote:
Originally Posted by Mark1960 View Post
Quote:
Originally Posted by ScottishColin View Post
All - I have not done anything with the idea in #1132, mainly because I don't know how....


Happy to try it but I'll need more detail I'm afraid.

Colin.
Don’t bother with #1132 yet, we’ll get back to that when we find out why there is no activity on /RAS and /CAS.

Lack of outputs from UH4 is common to both, but might be a problem with its inputs.

UH5-1 should be 1MHz square wave.
UH5-2 should have some activity or held high.
UH5-3 should be 1MHz when UH5-2 is high.
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