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    Re: Calculator question
    From: Courtney Thomas
    Date: 2005 Feb 21, 10:17 -0500

    Bill,
    
    Thank you for the memory information which gives a good basis of
    thinking about any transmogrification of your efficient programming :-)
    
    The only real appeal for me is a bigger viewing area, keyboard and RAM.
    But of course with the Link the most objectionable visual problem, i.e.
    programming, is ameliorated by PC use. Also the idea of possibly being
    able to put 'er in a ziploc would work much better for the TI-92 in that
    it's larger hence more usable that way.
    
    I am thinking of using a Search&Replace function in an editor for global
    instruction syntax changes. Any other ideas to ease the pain ? I like
    the TI-92's touchy/feely attributes and they can be bought on Ebay for
    little more than a TI-82. If I do this I'll be pleased to give you a
    copy in case you want to consider a TI-92. Nice machine.
    
    Cordially,
    
    Courtney
    
    
    WSMurdoch{at}AOL.COM wrote:
    
    > In a message dated 2/19/05 7:37:25 P.M. Eastern Standard Time,
    > FrankReedCT{at}AOL.COM writes:
    >
    >     The most recent TI-89 has something like 3 megabytes of memory. It
    >     can take simple programming and also relatively sophisticated code,
    >     and they do *symbolic* algebra, trig, and differentiation and
    >     integration, too. But no solar power
    >
    > 3 MB is far more memory than is really necessary for a celestial
    > navigation calculator unless you write software like one of Bill Gates's
    > employees.  Here are the memory requirements used in a TI-82 program
    > that I wrote in the early 1990's using TI basic.
    >
    >
    >
    > To input time and convert to a single unit - 468 bytes
    >
    > To calculate a few time dependent constants - 227 bytes
    >
    > To input a position - 400 bytes
    >
    > To calculate almanac data to +/- 0.01 (2 S.D.) accuracy -
    >
    >    Sun - 650 bytes
    >
    >    Moon - 1448 bytes
    >
    >    93 stars - 1682 bytes for data and 632 bytes for the program
    >
    >    Planets - 411 bytes
    >
    >          plus for each planet:
    >
    >       Venus - 555 bytes
    >
    >       Mars - 964 bytes
    >
    >       Jupiter - 1451 bytes
    >
    >       Saturn - 1879 bytes
    >
    >    Input sextant and other sight data - 796 bytes
    >
    >    Convert R.A. to GHA - 146 bytes
    >
    >    Reduce the sight - 201 bytes
    >
    >    Display the azimuth and intercept - 191 bytes
    >
    >
    >
    > The whole program which does almost everything I could think of except
    > lunars fits in a 28 KB memory.
    >
    >
    >
    > I too think it would be nice to have solar power and be free of the
    > batteries.
    >
    >
    >
    > Bill Murdoch
    >
    >
    >
    >
    >
    >
    >
    >
    >
    
    
    --
    s/v Mutiny
    Rhodes Bounty II
    lying Oriental, NC
    WDB5619
    
    
    

       
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