At present, many software tools are available that can assist us in the process of simulating combinational digital circuits. Recent applications use a graphical user interface (GUI) to create schematics using drag-and-drop semantics for placing logic elements. These are then connected by dragging “wires” between elements. Such work is carried out in a non-systematic process that’s not optimal, and changes to the circuit—e.g., deleting or moving elements—isn’t an easy job.
Typically, this type of development also requires another interface to edit simulation vectors. We present an approach that allows a user to continue using a GUI while providing a way to edit the circuit schematic without using lines to define the connectivity between components.