Can LLMs Reconstruct a Lost Processor? A Structural VHDL Benchmark on the E80 CPU

Supporting material for the paper "Can LLMs Reconstruct a Lost Processor? A Structural VHDL Benchmark on the E80 CPU". It holds the design each model produced at every attempt of the four staged tasks (adding a parity flag, then rebuilding the RAM, the ALU, and the CPU of the E80 soft-core in structural VHDL), the prompt for each stage, the simulation traces fed back to the models after logic errors, the test programs and reference trace used to judge a run, and the script and frozen output behind the training-data analysis (the share of VHDL in The Stack that meets the E80's constraints). Each design file carries a header giving the model, the attempt number, and the outcome, so the files map directly onto the results table in the paper. Because the models were accessed through consumer web interfaces that change over time, this is a record of the runs we report, not a pipeline that reproduces them deterministically. See the included README for the full layout and a step-by-step reproduction of the analysis.