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Old 11th Apr 2021, 7:02 pm   #1562
ScottishColin
Octode
 
Join Date: May 2012
Location: Perth, Scotland
Posts: 1,804
Default Re: Non-working Commodore PET 3016

Here's UC9 pins 12, 13, 14 and 15.

Colin.


Quote:
Originally Posted by SiriusHardware View Post
Yes, if you haven't already. The one we think there could be a problem with is UC7 pin 2 - UC9 pin 15 (Same signal line, different ICs, just to make sure the signal is present at both ends).

Disregard anything I said about UC9 pins 1 through 10, I was obviously having a bad day yesterday. As long as we have the expected signal on UC7 pin 2 / UC9 pin 15, the 74LS145 remains the prime suspect.
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Name:	UC9 pin 13 - 20210411.jpg
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Name:	UC9 pin 15 - 20210411.jpg
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