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Programming Handheld Calculators - Thomas Klemm - 09-13-2015 11:13 AM
Programming Handheld Calculators
A reminiscence about programming in the era before personal computers
by Paul Lutus
There was an earlier thread: HP 65/25 shout-out in interview with Paul Lutus
I've added the three programs mentioned in the article to the HP Software Libraries:
Cheers
Thomas
RE: Programming Handheld Calculators - rprosperi - 09-13-2015 01:56 PM
(09-13-2015 11:13 AM)Thomas Klemm Wrote: Programming Handheld Calculators
A reminiscence about programming in the era before personal computers
by Paul Lutus
There was an earlier thread: HP 65/25 shout-out in interview with Paul Lutus
I've added the three programs mentioned in the article to the HP Software Libraries:
Cheers
Thomas
Thanks for sharing these Thomas. The HP-25 article brought back fond memories of my first programmable machine. Though I wrote lots of programs for my 25C, spaceflight was never one of them. I believe that first happened with a PPC article/program for the 41C. I skipped the 67 back then, but have corrected that omission in recent years.
RE: Programming Handheld Calculators - PANAMATIK - 09-13-2015 04:37 PM
(09-13-2015 11:13 AM)Thomas Klemm Wrote: Programming Handheld Calculators
A reminiscence about programming in the era before personal computers
by Paul Lutus
There was an earlier thread: HP 65/25 shout-out in interview with Paul Lutus
I've added the three programs mentioned in the article to the HP Software Libraries:
Cheers
Thomas
Very nice programs. Thank you for giving the links.
I tried the Solar calculator on my HP-67. It calculates declination with nice approximation +- 1/2 degree or so. It cannot be used for astronomical navigation, but for knowing when to get up for sunrise.
I compared the results with Mike Stefanski's Nj.exe at
http://www.kowoma.de/gps/astronav/nautjahrbuch.php
This program has an excellent accuracy and when having a look to its mathematics, it never can be entered into a vintage handheld calculator. BTW I ported this old DOS Pascal program to a VS2013 C# application last week
Bernhard
RE: Programming Handheld Calculators - Eddie W. Shore - 09-13-2015 04:47 PM
(09-13-2015 11:13 AM)Thomas Klemm Wrote: Programming Handheld Calculators
A reminiscence about programming in the era before personal computers
by Paul Lutus
There was an earlier thread: HP 65/25 shout-out in interview with Paul Lutus
I've added the three programs mentioned in the article to the HP Software Libraries:
Cheers
Thomas
Thanks!
RE: Programming Handheld Calculators - Steve Simpkin - 09-13-2015 05:32 PM
Well that brings back fond memories. The program that Paul Lutus submitted to Popular Electronics magazine (Space Flight) really fired my imagination with what could be done with a programmable calculator. I had been saving for almost two years and was already planning to buying my HP-25 in June 1977 on my 16th birthday. This article in Popular Electronics (which came out in May) just added to the fever. After I bought my HP-25 I ended up playing with Paul's program for hours plotting the orbits around various sized planets. Looking back it was a magical time in my life.
RE: Programming Handheld Calculators - Massimo Gnerucci - 09-13-2015 05:55 PM
Nice, thank you Thomas.
However a couple images courtesy MoHPC, not Hewlett-Packard... ;)
RE: Programming Handheld Calculators - Katie Wasserman - 09-16-2015 11:31 AM
[Split thread, see Fireball XL5, etc.]