Stack Overflow Sensing (or: make your own Red Dot!)

[hansklav]

Inspired by the proposal of John A. Ball in his book ‘Algorithms for RPN Calculators’, as a proof of concept I implemented a stack overflow sensing (SOS) scheme using Neil Fraser's JavaScript HP-35 simulator.

In the process I made my own ‘Red Dot’ HP-35 calculator ;-)

Have a look here and see for yourself if HP missed a chance to build SOS into its very first pocket calculator (and, incidentally, into all its subsequent classical RPN models).

Hans

P.S.: I discovered a small inaccuracy in the functioning of the π-key of the original HP-35 simulator and corrected it in the HP-35 SOS.