implemented a script for #GlasgowInterfaceExplorer that lets you discover the connectivity of any IC with JTAG boundary scan, provided you can give the IC an arbitrary stimulus (here done by using a glasgow output connected to a needle point probe)
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script in question (eventually this will become an applet) https://gist.github.com/whitequark/aa0028915978fd3eb5b19a0e58bb7997
spent about 10 minutes to extract 37 nets from a PCB without deprocessing it; I think this is quite good
next up: making it possible to chain two components with JTAG (or just use two JTAG ports) so that their mutual connectivity can be discovered without deprocessing the PCB
the recovered connectivity seems right!
currently disassembling the original bitstream for this thing, which does uh. signal processing
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