HP Forum Archive 16

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Curiosities of HP 12 C Message #1 Posted by Prof. Cristiano Plack de Lima on 30 Mar 2006, 1:50 p.m. Hi, anybody know, about anything curiosities of hp 12c. I know how you (the user) can block the access to use it. The Auto-Test, is common. What have more .... ????? Send-me suggestions, ok. Greetings Edited: 30 Mar 2006, 1:57 p.m.

Re: Curiosities of HP 12 C Message #2 Posted by Eric Smith on 30 Mar 2006, 4:28 p.m., in response to message #1 by Prof. Cristiano Plack de Lima Quote: I know how you (the user) can block the access to use it. How's that? Take the batteries out? I obviously don't understand what you're trying to describe. The only thing about the 12C that seems curious to me is that they made the little-known function "RCL g R/S" programmable. I haven't yet seen any use for it in a program, though.

Re: Curiosities of HP 12 C Message #3 Posted by bill platt on 30 Mar 2006, 4:29 p.m., in response to message #2 by Eric Smith Does it hatch an easter egg?

Re: Curiosities of HP 12 C Message #4 Posted by Eric Smith on 30 Mar 2006, 9:08 p.m., in response to message #3 by bill platt Quote: Does it hatch an easter egg? I've never observed it to do so, but then I haven't tried all the possible argument values.

Re: Curiosities of HP 12 C Message #5 Posted by Valentin Albillo on 31 Mar 2006, 4:56 a.m., in response to message #2 by Eric Smith Hi, Eric: Eric posted: "The only thing about the 12C that seems curious to me is that they made the little-known function "RCL g R/S" programmable. I haven't yet seen any use for it in a program, though." My article HP-12C Serendipitous Solver describes how you can use the HP-12C's built-in financial functions to find any and all real roots of a polynomial equation up to 1,480th degree or more, and includes a 37-step program to demonstrate the concept. Neither the solving process nor the evaluation of the polynomial do include any user-code, iterative processes, all is done in microcode. The RCL g R/S instruction appears at step 22 in my program. The article also includes 5 fully detailed examples of the program's capabilities, including finding all 5 real roots of a 5th degree equation and a real root of a 137th degree equation. Best regards from V.

Curiosities of HP 12 C Message #6 Posted by Prof. Cristiano Plack de Lima on 31 Mar 2006, 9:03 a.m., in response to message #2 by Eric Smith No man, you need enter with a code, after this, your calculator are lock. You must enter other code, to use it. Cool, very cool. I write a article about this, in this month. Greetings Edited: 31 Mar 2006, 9:10 a.m.

Re: Curiosities of HP 12 C Message #7 Posted by Gene on 31 Mar 2006, 11:07 a.m., in response to message #6 by Prof. Cristiano Plack de Lima I don't believe it.

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