That raises questions though: How does he know that the chart is correct? Furthermore, whether it's correct or not, what was the process by which the LLM reached its conclusions, i.e. did it disassemble and examine the source itself or did it use pre-existing reverse engineering done by others on the internet like https://www.pcengines.ch/tp3.htm?
I had Codex GPT-5.4 xhigh run a check of those files to see if the artifact at the end appeared to use the right data, which isn't 100% fool proof but have me enough confidence to publish since this is a pretty low stakes project!
Here's the zip file it gave me of the files it generates along the way: https://static.simonwillison.net/static/2026/turbo-pascal-an...
I had Codex GPT-5.4 xhigh run a check of those files to see if the artifact at the end appeared to use the right data, which isn't 100% fool proof but have me enough confidence to publish since this is a pretty low stakes project!