Simon Willison 3/21/2026

Turbo Pascal 3.02A, deconstructed

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The article details a project to analyze the compact 39,731-byte Turbo Pascal 3.02A executable from 1985. Using AI (Claude), the author decompiled the binary, which included a full IDE and compiler, into annotated assembly code. The result is an interactive artifact that segments and explains the historic software's internal structure.

Turbo Pascal 3.02A, deconstructed

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