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

[Gerson W. Barbosa]

(03-30-2014 03:12 AM)bkn42 Wrote:  

(03-30-2014 12:07 AM)Gerson W. Barbosa Wrote:  66 R/S --> 3.141592654 (2 m 37 s)

My FPGA "HP-55" gets the same answer but in under 1/2 second in turbo mode.

Brian

Thank you for bringing the HP-55 (and your "HP-55") in here! Funny to see how calculators were like back then. In 1982 I had a TI-59 for a while ( no continuous memory, but it had magnetic card reader), then next year something much better: an HP-15C.
At first I thought you had converted the pi program to the "HP-55" like the previous one for the ln(2) series, judging by the picture in your detailed thread on the "HP-55", but then I realized it was the rational approximation 355/113. This one appears in the small HP-35 manual, BTW.

Regards,

Gerson.

Updated to include hyperlink