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UniProbe - an UNIBUS signal adapter

When repairing DEC PDP-11s there's always the need to see whats happening on the main system bus. On older 11s this is the UNIBUS.

After several try-and-error cycles, I think I now have the perfect signal adapter for UNIBUS ... calling it "UniProbe". In KiCAD 3D rendering it looks like this:

uniprobe3d total

UniProbe has these features:

  • can be built to plug into Standard UNIBUS or Modified UNIBUS slots.
  • can be built to be a PDP-11/34 M9302 or a simple M930 terminator.
  • LEDs for all 56 UNIBUS signals on the card edge.
  • Logic analyzer probe plugs and a patch board area for measuring the signals.

Read on!

 

Title Author
UniProbe - Introduction Administrator
UniProbe - Front panel Administrator
UniProbe - Standard UNIBUS, Modified UNIBUS Administrator
UniProbe - M9302 functionality Administrator
UniProbe - Logic analyzer interface Administrator
UniProbe - Using, Getting, Building, Downloads Administrator