The Museum of HP Calculators

HP Forum Archive 20

 DM-15CC? THIS is a calculator for real men!Message #1 Posted by Joerg Woerner on 18 Feb 2012, 6:30 p.m. Hi Guys, You are talking recently a lot about credit card-sized calculators. Are you kidding? This is America, the land of the Ford F-150 Pickup Trucks. Are you driving the Smart car or the new Scion iQ? This is now a calculator for REAL men: Have fun, happy calculator hunting and have a great weekend, Joerg

 Re: DM-15CC? THIS is a calculator for real men!Message #2 Posted by Paul Dale on 18 Feb 2012, 6:36 p.m.,in response to message #1 by Joerg Woerner That mystery button in the bottom right means this is a calculator for wimps :-) - Pauli

 Re: DM-15CC? THIS is a calculator for real men!Message #3 Posted by Joerg Woerner on 18 Feb 2012, 6:52 p.m.,in response to message #2 by Paul Dale And the one above the [ON/OFF] key that it shouts back ;-)) Joerg

 Re: DM-15CC? THIS is a calculator for real men!Message #4 Posted by hpnut on 18 Feb 2012, 7:21 p.m.,in response to message #2 by Paul Dale yup, real RPN calcs have no = :-)

 Re: DM-15CC? THIS is a calculator for real men!Message #5 Posted by Gerson W. Barbosa on 18 Feb 2012, 7:29 p.m.,in response to message #4 by hpnut Yes, real RPN calcs are nonpareil :-) From http://www.merriam-webster.com/dictionary/nonpareil : NONPAREIL: having no equal

 Re: DM-15CC? THIS is a calculator for real men!Message #6 Posted by C.Ret on 19 Feb 2012, 3:54 p.m.,in response to message #4 by hpnut Quote: yup, real RPN calcs have no = :-) Nor have they any open or close parenthesis keys ! Also UP and DOWN keys may have been label Roll Up and Roll Dwn respectively !

 Re: DM-15CC? THIS is a calculator for real men!Message #7 Posted by Namir on 18 Feb 2012, 7:49 p.m.,in response to message #1 by Joerg Woerner How about a clear scan of your credit card??? Should help us get many units of the machine in the picture. :-) Namir

 Re: DM-15CC? THIS is a calculator for real men!Message #8 Posted by John B. Smitherman on 18 Feb 2012, 8:19 p.m.,in response to message #7 by Namir Joerg is bragging about having a gold card. ;-) John

 Re: Yes, it's all about my gold cardMessage #9 Posted by Joerg Woerner on 19 Feb 2012, 3:30 p.m.,in response to message #8 by John B. Smitherman My "real" gold card: Have a great Sunday. Joerg

 Re: Yes, it's all about my gold cardMessage #10 Posted by Paul Dale on 19 Feb 2012, 4:30 p.m.,in response to message #9 by Joerg Woerner What does the musical notes button do? - Pauli

 Re: Yes, it's all about my gold cardMessage #11 Posted by Massimo Gnerucci (Italy) on 19 Feb 2012, 4:33 p.m.,in response to message #10 by Paul Dale Ding-ding! :)))

 Re: Yes, it's all about my gold cardMessage #12 Posted by Joerg Woerner on 19 Feb 2012, 5:19 p.m.,in response to message #10 by Paul Dale Simulates "tactile" feedback from the key. Joerg

 Re: Yes, it's all about my gold cardMessage #13 Posted by Katie Wasserman on 19 Feb 2012, 5:43 p.m.,in response to message #9 by Joerg Woerner Joerg, I've been meaning to ask you for the longest time..... What's so special to you about 2*SQRT(2) that you show this on so many of the calculators in your pictures? Not that there's anything wrong with this irrational number, but it would not be at the top of my list of exciting numbers I have known :) -Katie

 Re: Yes, it's all about my gold cardMessage #14 Posted by Joerg Woerner on 19 Feb 2012, 6:30 p.m.,in response to message #13 by Katie Wasserman Katie, Good question... I was inspired and mentored by Viktor T. Toth when I started the layout of the Datamath Calculator Museum and he used for all his calculator pictures pi = 3.14159265... in the display. Long before (this was in 1999) I used already SQR (8) * 100000 - 282842 = ??? to reveal the number of digits used in internal algorithm of scientific calculators. Now you know my little secret ;-)) Good that you didn't asked why my eBay handle was "jogibogi" till a few years ago. That's something I would whisper in your ear;-)) Cheers, Joerg

 Re: Please translate to RPN!!!Message #15 Posted by Joerg Woerner on 19 Feb 2012, 6:31 p.m.,in response to message #14 by Joerg Woerner Oops - can you translate the 282842 thing to RPN, please???? Regards, Joerg

 Re: Please translate to RPN!!!Message #16 Posted by Gerson W. Barbosa on 19 Feb 2012, 8:35 p.m.,in response to message #15 by Joerg Woerner Not related to your request, just an attempt to show SQRT(8) might be an interesting number :-) ```8 SQRT EEX 8 * 17 1/x yx (RPN) ( SQRT 8 * EE 8 ) ^ 17 x-1 ENTER (AOS) ``` Regards, Gerson.

 Re: Please translate to RPN!!!Message #17 Posted by Katie Wasserman on 19 Feb 2012, 9:29 p.m.,in response to message #16 by Gerson W. Barbosa Only 6 significant digits, not a good enough reason for me to like this number :)

 Re: Please translate to RPN!!!Message #18 Posted by Gerson W. Barbosa on 19 Feb 2012, 9:52 p.m.,in response to message #17 by Katie Wasserman Ok, sqrt(2) is better, and given infinite time it would help compute pi to the last digit :-) I don't know GolfScript but I guess the 29-byte script for 1000 digits of pi uses the Vieta's formula, like your 12-step program for the HP-12C:Edited: 19 Feb 2012, 9:58 p.m.

 OT: Re: Please translate to RPN!!!Message #19 Posted by Katie Wasserman on 20 Feb 2012, 12:29 p.m.,in response to message #18 by Gerson W. Barbosa Gerson, Golfscript has been mentioned here a few times, thanks for the reminder to looking into this some.... It looks to me like a mix of RPL and APL with a little LISP thrown in, only just for integers. I like all these characteristics in a programming language but not the "write only" usability of it. I wonder if there are more than 10 people in the world who've used this more than once. Do people here have experience with GolfScript? I see that Oliver mentioned building this into his ND1, but I'm not sure if that ever happened. -Katie

 Re: Please translate to RPN!!!Message #20 Posted by Gerson W. Barbosa on 19 Feb 2012, 11:35 p.m.,in response to message #17 by Katie Wasserman Quote: Only 6 significant digits, A more interesting result, perhaps: pi^34 = 8.00010471505*10^16 The underlined digits match exactly the first five significant digits of pi/3. This leads to the polynomial x^34 - (1/3)*10^12*x - 8*10^16 = 0 whose positive real root is 3.14159265364 Nice coincidence, isn't it? Edited to correct a mistake in the second coefficient On the HP 50g ```[ 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 '-1/3*1E12' -8E16] PROOT``` returns a positive real root 3.14159265364. The wp 34s polynomial solver should return 3.141592653644187, but I haven't tested on it yet. Edited: 20 Feb 2012, 2:07 p.m.

 Re: Yes, it's all about my gold cardMessage #21 Posted by Paul Dale on 19 Feb 2012, 11:23 p.m.,in response to message #14 by Joerg Woerner Quote:Long before (this was in 1999) I used already SQR (8) * 100000 - 282842 = ??? to reveal the number of digits used in internal algorithm of scientific calculators. This fails for the 34S. The sixteenth digit is a zero. - Pauli

 Re: DM-15CC? THIS is a calculator for real men!Message #22 Posted by Jim Yohe on 18 Feb 2012, 10:23 p.m.,in response to message #1 by Joerg Woerner Doesn't meet my "carry in my shirt pocket" requirement. ;-)

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