An Open-source Scientific RPN Calculator | Hackaday
![Ken Shirriff] Completely Reverse Engineers The 1974 Sinclair Scientific Calculator | Hackaday](https://hackaday.com/wp-content/uploads/2013/08/reverse-engineer-sinclair-scientific-calculator.png "Ken Shirriff] Completely Reverse Engineers The 1974 Sinclair Scientific Calculator | Hackaday")
Ken Shirriff] Completely Reverse Engineers The 1974 Sinclair Scientific Calculator | Hackaday
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electronupdate: Reverse Engineering a Simple Four Function Calculator: die decap
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Ken Shirriff on Twitter: "Log and exponentiation used another trick, basing them on powers of .99. This is efficient since X*.99=X-X/100; dividing by 100 is just a shift on a decimal calculator.
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An Open-source Scientific RPN Calculator | Hackaday
