Thanks to [Nick Bild], there is, in the form of the “Schematic-o-matic”, which ... each bus bar is connected to an IO pin on an Arduino Due. A program runs through each point on the breadboard ...

This code was created in 2001-2004 when I taught Borland Delphi 3 to myself. It contains many, many global variables, unstructured and undocumented procedural code and bad variable names.