RPN Scientific Firmware for the Spikenzielabs Calculator Kit

[securd]

Hi striegel,

I thought about that! But when using RPN, multiple presses could very well represent multiple intentional operations. In fact on my old HP's I used to hit "1 enter enter enter enter" to fill the stack, then repeat "+ + + +..." to use the calculator as a simple counter. That said, I did use the Clear key for multiple functions (one press performs CLX, second press performs clear stack). I also experimented with holding the key down until it changes function (sort of like the the HP-41C). I also used this technique on the Clear key: holding it down 3+ seconds causes the calculator to switch into self-test mode. So technically, the Clear key has four functions! Power On, CLX, Clear Stack, and Self-Test.

I really wish we had another couple of rows of keys, and a couple more digits on the display -- but otherwise this little calculator is a true gem!

Steve.