Show HN: MacMind – A transformer neural network in HyperCard on a 1989 Macintosh
Summary
MacMind is a complete transformer neural network implemented entirely in HyperCard on a 1989 Macintosh SE/30, with 1,216 parameters. It learns the bit-reversal permutation through self-attention and gradient descent, demonstrating backpropagation and the FFT-related structure on vintage hardware. The project serves as an accessible, inspectable demonstration of core ML concepts and offers a compelling retrocomputing perspective on modern AI ideas.