HP Forum Archive 09

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Changing Interest Message #1 Posted by Gordon Dyer on 20 Dec 2002, 5:29 a.m. My interest in calculators started from a science background when power series and Bessel functions were interesting. At that time when I saw a financial calculator I thought Amort was a dead person! However, now I have a mortgage and have to buy cars and other expensive things I have found a new interest in financial calculators, my collection has grown to include: HP-38C HP-12C (old and new) HP-10B (old and new) HP-14B 50th anniversary HP-17BII (brown bezel) HP-10BII Commodore F4902 Car salesmen always look scared when I put one of these on their desk and check the repayments! I would also like to get the financial modules for HP-41CV and HP-71. Can anyone help?? Gordon

Re: Changing Interest Message #2 Posted by John Smith on 20 Dec 2002, 7:40 a.m., in response to message #1 by Gordon Dyer As your subject is "Changing Interest", may I suggest you try and get a vintage Sharp PC-1421 Financial Pocket Computer ? You can have a look at it here: http://pocket.free.fr/html/sharp/pc-1421_e.html http://pocket.free.fr/images/sharp/pc-1421.jpg It's a wonderful machine: very slim, lightweight, metallic body, full alphanumeric dot-matrix display, comes with 4 Kb RAM but admits extra RAM Cards, has an I/O port to store/load programs on tape, or connect it to a printer, etc. But most importantly for your new interest, it features a full array of financial functions (including Internal Rate of Return, mortgages, date calculations, anything) PLUS all usual mathematic functions and BASIC language commands (i.e: trigs, logs, subroutines, for-next loops, two dimensional arrays, long name variables, string variables, etc). Of course, all financial functions can be used right from the keyboard AND from BASIC programs !! :-) You can even do machine language programming (PEEK, POKE, CALL) on the machine itself (for instance to create and animate graphics on the dot-matrix LCD), no accessories needed. And, as a big plus, it's very fast, much faster than, say, an HP-12C. Of course, with its memory, expandability, speed, plus its powerful BASIC language extended with financial commands, you can do real wonders with it, specially if attaching a full-size line printer to it. Also, it has continuous memory (of course), but the RAM cards with your financial programs and data on them can be removed from the machine or exchanged without losing their contents, as well. My advice: get one (eBay ?) fast, and you'll be delighted. I certainly am with mine.

Re: Changing Interest Message #3 Posted by Gordon Dyer on 20 Dec 2002, 2:34 p.m., in response to message #2 by John Smith WHAT??? IS this heracy, recommending a Sharp maching in the HP site???

Re: Changing Interest Message #4 Posted by Masao Kinoshita on 20 Dec 2002, 9:05 a.m., in response to message #1 by Gordon Dyer A few years ago, my wife and I were looking for a new car and one deal that a salesman gave us seemed too good to be true. I whipped out my HP 48GX and indeed it was too good to be true. Their deal maker had made an error. The 48GX is indeed an amazing calculator!

Re: Changing Interest Message #5 Posted by gifron on 20 Dec 2002, 1:15 p.m., in response to message #1 by Gordon Dyer One place I like to check occasionally is The Bull Cabinet (http://members.aol.com/tbcab/private/hewlettpackard.htm). Having just checked after reading your post, I see that they have the GMAC I, II, and III modules listed - No prices though.

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