Calculators as amusement  Printable Version + HP Forums (https://archived.hpcalc.org/museumforum) + Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum1.html) + Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum2.html) + Thread: Calculators as amusement (/thread176896.html) 
Calculators as amusement  designnut  01102011 I have discovered undocumented calculator actions by trying key manipulations. I have found solutions undreamed of in pure math. Re: Calculators as amusement  Michael Meyer  01102011 Does obsession count?
Re: Calculators as amusement  Namir  01102011 Care to share some examples?
Re: Calculators as amusement  Geir Isene  01102011 Quote:
Has anyone? I do it all the time.
Re: Calculators as amusement  db (martinez, ca.)  01102011 NO! OF COURSE NOTsent from a river in Egypt Re: Calculators as amusement  Crawl  01102011 One time I used fractions on a calculator and it made me travel through time.
Re: Calculators as amusement  Palmer O. Hanson, Jr.  01102011 Quote:I haven't done any of that with HP machines. Back in the early 1980's I was very active with that sort of thing with the TI57, TI59 and TI66.
When the TI66 came out page F3 of the manual stated "There are no HIR commands or other hidden features on the TI66 that you may have accessed on the TI58/58C/59 through illegal key sequences." The first issue of TI PPC Notes published after the release of the TI66 included some results with illegal sequences.
Re: Calculators as amusement  designnut  01112011 Do you know of the undocumented clock in the HP45? I must have shown that to 10 astonished owners.No I didn;t discover it. I did discover that when constants are displayed in the 33s and 35s keying number 16 selects the constant and enters it into x. I found the solution to the output resistancer of a resisttive divider by playing witth sequences when Iknew the answer. Thqt opened a wider truth in resistive jubctions. Sam
Re: Calculators as amusement  Crawl  01112011 Okay, seriously, I did discover how to do some limited programming on some Casio models (115ms and es, I think), which is not documented in the manual.
It's very limited because there's no conditional branching, and looping isn't automatic. But I've gotten use out of it for summing series, or using Newton's method in two dimensions.
Re: Calculators as amusement  Paul Gaster  01112011 I would be interested in hearing more about what can be done with the FX115 models if you could share. Re: Calculators as amusement  ClausB  01112011 Back then I had not seen TI PPC Notes but I heard rumors about hidden keycodes. Now I enjoy reading the old issues online (as well as 65 Notes and 52 Notes). I got into the spirit a few decades late and posted some PPC Notes style articles on Viktor's site. Look on the bottom of this page: Re: Calculators as amusement  Crawl  01112011 Boy, I don't know. If you had a specific problem in mind, I could see if the 115 could solve it. But like I said, there's no branching, so you wouldn't be able to choose what variable to solve for from a single multipurpose program. There's also no long term program storage, which would also defeat the purpose of something like that. Then some of the variables could be solved for simply by using the calculator's built in solver, I think.
So, yeah, I think it really depends on what you specifically want to do.
Re: Calculators as amusement  Ron Ross  01112011 That should be easily possible as the FX115 has a solver with six variables. The downside is that this calculator loses this function the minute it is turned off. Therefore not a machine you want to enter complex work on.
Re: Calculators as amusement  Paul Gaster  01122011 I was just thinking along the lines of the FE and PE test that I hear usually have some TVM questions. With a 33S or 35S you can input the TVM equation and be ready to go. I think I also read somewhere that the materials provided on test day have equations and TVM tables that can be used. I did pass the FE about 15 years ago, but I don't remember much and I am sure things have changed. Overall my mind just got off on a tangent. I really like the FX115ES and would like to know more about it. The HP offerings first need some programming to even match the FX115ES in features, but of course with programming and equation storage you can eventually do more with an HP. The FX115ES is a great calculator though, especially considering the low cost.
