Feb 122017


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Microcode-level HP-35 Emulator (in JavaScript!)





Ashley Nathan FenielloSeptember 25, 20105

[Part 1 of the HP Calc

I recently started a super-geeky side hobby of collecting vintage calculators and got my hands on a pair of HP calcs. The more I learned about the internals of the devices, the more intrigued I was. Jacques Laporte has an absolutely wonderful site going into crazy detail.

In 1972, Hewlett-Packard amazed the engineering world and killed the slide rule with the release of the HP-35 calculator; the very first hand-held electronic scientific calculator. Most astonishing was that apparently even cute girls loved RPN and were impressed by the device’s ability to do transcendental logarithm and trigonometry functions.

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