What happened to the open bench logic sniffer?
The theory behind this will be at: https://www.sump.org/projects/analyzer/ .
You could optionally try the following: https://hackaday.io/project/25745-beaglelogic-standalone.  Search OSHPark for &quot;BeagleLogic Standalone&quot;.  Project at: https://github.com/abhishek-kakkar/BeagleLogic