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DM-15CC? THIS is a calculator for real men! - Printable Version

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DM-15CC? THIS is a calculator for real men! - Joerg Woerner - 02-18-2012

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! - Paul Dale - 02-18-2012

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! - Joerg Woerner - 02-18-2012

And the one above the [ON/OFF] key that it shouts back ;-))

Joerg


Re: DM-15CC? THIS is a calculator for real men! - hpnut - 02-18-2012

yup, real RPN calcs have no = :-)


Re: DM-15CC? THIS is a calculator for real men! - Gerson W. Barbosa - 02-18-2012

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! - Namir - 02-18-2012

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! - John B. Smitherman - 02-18-2012

Joerg is bragging about having a gold card. ;-)


John


Re: DM-15CC? THIS is a calculator for real men! - Jim Yohe - 02-18-2012

Doesn't meet my "carry in my shirt pocket" requirement. ;-)


Re: Yes, it's all about my gold card - Joerg Woerner - 02-19-2012

My "real" gold card:

Have a great Sunday.

Joerg


Re: DM-15CC? THIS is a calculator for real men! - C.Ret - 02-19-2012

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: Yes, it's all about my gold card - Paul Dale - 02-19-2012

What does the musical notes button do?


- Pauli


Re: Yes, it's all about my gold card - Massimo Gnerucci (Italy) - 02-19-2012

Ding-ding!

:)))


Re: Yes, it's all about my gold card - Joerg Woerner - 02-19-2012

Simulates "tactile" feedback from the key.

Joerg


Re: Yes, it's all about my gold card - Katie Wasserman - 02-19-2012

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 card - Joerg Woerner - 02-19-2012

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!!! - Joerg Woerner - 02-19-2012

Oops - can you translate the 282842 thing to RPN, please????

Regards,
Joerg


Re: Please translate to RPN!!! - Gerson W. Barbosa - 02-19-2012

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!!! - Katie Wasserman - 02-19-2012

Only 6 significant digits, not a good enough reason for me to like this number :)


Re: Please translate to RPN!!! - Gerson W. Barbosa - 02-19-2012

Ok, sqrt(2) is better, and given infinite time it would help compute pi to the last digit :-)

http://www.golfscript.com/golfscript/examples.html

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:

http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv016.cgi?read=101118 (Message #22)


Edited: 19 Feb 2012, 9:58 p.m.


Re: Yes, it's all about my gold card - Paul Dale - 02-19-2012

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: Please translate to RPN!!! - Gerson W. Barbosa - 02-19-2012

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.


OT: Re: Please translate to RPN!!! - Katie Wasserman - 02-20-2012

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