18th Mar 2021, 10:29 pm
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#1166
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Octode
Join Date: May 2012
Location: Perth, Scotland
Posts: 1,813
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Re: Non-working Commodore PET 3016
Attached.
Colin.
Quote:
Originally Posted by SiriusHardware
Well, that's still interesting despite the brief diversion as it means we really don't have a BANK SEL signal.
If you could now please scope the input pins on UB2 pins 9, 10,12,13 and let us see what's there? Ideally we need a 3-input scope at this point, but never mind.
Can you capture:-
UB2 pin 9 (channel 1) and UB2 pin 10 (channel 2)
UB2 pin 9 (channel 1) and UB2 pin 12 (channel 2)
UB2 pin 9 (channel 1) and UB2 pin 13 (channel 2)
Try to get at least one complete cycle of the pin 9 waveform on the screen in each case.
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