VM Stack Machine Simulator

What this is for

The VM is defined by what each op does to the stack. Every op has exactly one stack-state delta. Predict, then Step. The eight segments are named windows into the host RAM; seed any segment cell below and watch push local 0 read it, pop local 0 write it. Arithmetic ops (add sub neg eq gt lt and or not) pop their operands and push the result. This is the abstract machine your Ch 7 translator must faithfully realize.