Programming Exercise (HP-15C, 15C LE - and others)

[Gerson W. Barbosa]

(03-21-2014 01:52 AM)Dave Britten Wrote:  Basically, I'm banking on SIGMA- being faster than 1, +/-, RCL+ 4, STO 4. I haven't actually tested that hypothesis yet, mind you.

I guess it should slower, considering the extra calculations involved. My 21-step HP-12C version takes 2 minutes on my HP-12C+ (not the fastest one around). Using Sigma- to decrease the counter made it 52 seconds slower (and one step longer, but that was a quick modification).
Anyway, that was a nice trick to save a few steps on the HP-20S. Also, 10 minutes appear to be fast enough. Years ago a co-worker offered me an HP-20S in very good shape for a low price - I feel now I should have taken it.

Thank you for the unexpected algebraic program!

Gerson.