RAM chips pins 3,4 and 15 are consistent across all chips, but that doesn't look like activity to me on pins 4 and 15 unless I have my settings wrong?
https://drive.google.com/file/d/1Vxz...ew?usp=sharing
Colin.
Quote:
Originally Posted by SiriusHardware
I have to be honest, nothing is really jumping out at me there.
Can you try scoping the BD0... BD7 lines, you can find them on the first of each of these pairs of connected pins.
UI10 pins 11-12
UI10 pins 13-14
UI10 pins 15-16
UI10 pins 17-18
UI11 pins 11-12
UI11 pins 13-14
UI11 pins 15-16
UI11 pins 17-18
Also scope Pin 3 of each of the 4108s and pins 4 and 15 of each 4108 as well. No need to post those results, just confirm that all of them have activity on them with proper high / low logic levels.
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