This is some really old C++ code to simulate a simple computer. Back when I wrote this (circa 1991), I worked on Sparc architectural simulators for Sun Microsystems. The simulators were in C and had a really complicated mechanism for specifying the components to be simulated and their interconnections; I was trying to show the team that it could be done much more simply, like the dozen or so lines in Simulation.cpp.

Unfortunately they didn't know anything about C++ or OOP, and regarded C++ as a shiny new toy rather than a real option for serious work. History might be giggling at them just a little bit. :)