Heathkit EC-1 bootdisk wanted ( sort off..)

Jos wrote: EC-1 The true value of analog computers comes in when you stop dealing with "static" math and start dealing with "dynamic" math. In particular, capacitors as circuit elements let you build integrators and differentiators. These let you simulate and solve differential and integral equations. These are VERY MUCH of interest in the real world. Much work on chaos theory etc. was initially done on analog computers. (e.g. Lorenz Equation). Correct me if I'm wrong, but the EC-1 does NOT contain a general purpose 4 quadrant multiplier, right? This will limit you to rather dull (but still quite common) differential and integral equations and make it difficult to do the Lorenz equation for example. And recording the output of an analog computer is most easily done with a scope or pen-plotter. These can be added to an EC-1 quite easily but are not the basic setup. Tim.