Show HN: MacMind – A transformer neural network in HyperCard on a 1989 Macintosh

https://github.com/SeanFDZ/macmind

Article

  • Transformer neural network implemented in HyperCard running on a 1989 Mac
  • Demonstrates modern AI concepts are algorithmically old, not hardware-bound
  • Runs in HyperCard Simulator at hcsimulator.com for browser-based demo

Discussion

  • Commenters struck by how much AI progress is compute scale, not new ideas
  • Compared to germ theory being time-traveled to ancient Greeks
  • HyperCard Simulator link shared so anyone can run it without real hardware

Discuss on HN


Type Link
Added Apr 16, 2026
Modified Apr 16, 2026