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Bs2p<-->ti-89 ? — Parallax Forums

Bs2p<-->ti-89 ?

ArchiverArchiver Posts: 46,084
edited 2002-09-10 01:13 in General Discussion
Is it possible to program my bs2p to communicate with my TI-89? I want to be
able to store calculator programs onto my stampmem modules using my basic
stamp. If this is a stupid idea, I apologize.

d0gbert

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2002-09-09 18:05
    its actually a very good idea...

    calculators have always been plagued with very little memory, that is..
    if you are using your calculator for more than just calculating d;D

    it should be relatively easy if you know the protocol that the TI's
    use...

    not sure if you've been there, but www.ticalc.org or www.ti-calc.org
    (something to that effect) has information on how each of the TI's
    communicate.. it's pretty easy...

    from what i remember...
    there are 3 wires in the serial cable, one is ground, and 2 are for
    sending data..
    if one of the wires goes low, you have to pull the other one low, and
    when the first wire goes high again, you have received a binary 1...
    receiving a binary 0 is the same but the same events occur on the
    opposite data lines... ie.. the "other" wire goes low.......

    that explanation was probably more confusing than helpful, but the
    website i mentioned has much better info on the link protocol

    have fun d[noparse]:)[/noparse]

    -John
  • ArchiverArchiver Posts: 46,084
    edited 2002-09-10 01:13
    Can't help you on the TI-89, but here is a way on the 83 Plus.
    http://www.smallrobot.com/bs2ti.html
    Z-80 assembly and 180k of memory. With a graphic display and a keypad
    on the TI, it makes for a cheap add on to the basic stamp. Plus, it
    does any kind of math!

    Rick


    --- In basicstamps@y..., "d0gbertthegreat" <d0gbertthegreat@y...>
    wrote:
    > Is it possible to program my bs2p to communicate with my TI-89? I
    want to be
    > able to store calculator programs onto my stampmem modules using my
    basic
    > stamp. If this is a stupid idea, I apologize.
    >
    > d0gbert
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