HP Forum Archive 14

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Another Slice of PI Message #1 Posted by Bill (Smithville, NJ) on 11 May 2004, 2:32 p.m. For those who are curious.... I entered the PI program from PPC V7N5 Page 9 & 10 into the 42S. Just ran it for 500 digits in standard speed mode. Took 1 hour and 20 minutes. Now to do a 1,000 digits in both normal and Fast modes. I'm learning a lot about the 42S command set from just typing in these listings. I'm diffintely getting faster on program entry. Only typed one error this time. :)

Fastest HP41 PI program... Message #2 Posted by Gene on 11 May 2004, 11:59 p.m., in response to message #1 by Bill (Smithville, NJ) (that I know about) is a revision to the one you're running that Ron Knapp himself made. PPC Journal V8N6P69 Aug-Dec 1981 found on "that other site". :-) On the original HP41C, it cut the run time from over 10 hours for 1000 digits to 8.5 hours. If I can, I'll run it for 1000 digits on my 2X HP42S soon and get a time for everyone. Gene

Re: Another Slice of PI Message #3 Posted by Bill (Smithville, NJ) on 13 May 2004, 10:41 a.m., in response to message #1 by Bill (Smithville, NJ) Okay, Here's the results for the PPC V7N5 program run on the HP-42S: 500 Digits - Normal Speed 1 HR 20 Min 1000 Digits - Normal Speed 4 Hrs 50 Min 500 Digits - Fast Speed 40 Min 1000 Digits - Fast Speed 2 Hrs 20 Min So the Fast Speed is double the normal speed. Gene - I tried to get the revised program in PPC V8N6 to run. It ran for a while, then quit with error. I may not have entered it correctly since I really don't have a very readable copy of the listing. Do you have a clean copy of the listing that you could e-mail to me at bjunk.....vpes.com. (Put @ in place of dots). Thanks.

Re: Another Slice of PI Message #4 Posted by Gene on 13 May 2004, 11:13 a.m., in response to message #3 by Bill (Smithville, NJ) Great work! That's about what I was expecting in the 42S. The copy online at "that other site" is the only one I have access to right now. Jake Schwartz of course has them on his great CD roms. I have a printed copy at home I can check, but the GIF of that page on the "other site" looks pretty clear. Are there instructions you're not sure about? Gene

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