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

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I trained a transformer in HyperCard. 1,216 parameters. 1989 Macintosh. And yes, it took a while.<p>MacMind is a complete transformer neural network, embeddings, positional encoding, self-attention, backpropagation, and gradient descent, implemented entirely in HyperTalk, the scripting language Apple shipped with HyperCard in 1987. Every line of code is readable inside HyperCard&#x27;s script editor. Option-click any button and read the actual math.<p>The task: learn the bit-reversal permut