HP-15c: Why so popular?

[Maximilian Hohmann]

Hello Bob,

(11-03-2023 11:10 AM)rprosperi Wrote:  @Max - While the TI-59 (and 58/58C) had optional ROM modules supplying many of the built-in 15C capabilities (as well as many not found in the 15C), for a fair comparison these should not be included. Matrices, Complex, Solver, etc. are key differences where modules were needed and adding the cost for some of these changes the cost advantage considerably. But, yes, these machines were indeed excellent and pushed HP more than any other model at any time IMHO.

All (*) the functions included in the HP-15C were contained in the "Master Library Module ML-01" that came for free with every Ti-58/59. No extra cost involved. And you got financial calculations and a (stupid) game on top - for free. And it allowed you to copy the source code of all those functions into RAM and modify them according to your needs.

Regards
Max

(*) Maybe the Gamma function is not included in the ML-01 module. But I really don't know because my lifeline never crossed path with that function - not at school, university or at work. To be honest I really don't know what it does...