Re: TI-H: Re: SF 92 and Expander SF II with sound
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Re: TI-H: Re: SF 92 and Expander SF II with sound
In this message, you mention something about the I2C interface. What
exactly is it and where can I get more information on it?
----------
> From: Richard Piotter <richfiles@hotmail.com>
> To: jbfpoker@hutchtel.net; ti-hardware@lists.ticalc.org
> Subject: TI-H: Re: SF 92 and Expander SF II with sound
> Date: Sunday, October 05, 1997 1:46 PM
>
> >I know I just mailed you but one last question. Will he give the
> schematics
> >out for the Expander Up. Also then could I develope somthing that
> works
> >like it. If I made the assembly software for th 92 would the SF work?
> >
> Possibly, you could make a fargo driver for the SF, but i wish you luck.
> The TI-92 has a few dificulties with direct link port opperation. I
> think it is possible to do it, but no one has, plus it is discontiued,
> and with a working prototype out there, it would not be a very useful
> plan. I did however want to see if an Amtel chip could work. And I2C
> interface could make it possible and allow multiple chips to run. It
> would use a very small interface, and is already developed. You could
> problably even add a 1, 2, possibly even a 4 bit speaker that would work
> with it and could run SIMULTANEOUSLY and because the I2C chip is
> bidirectional, it may be possible to record sound using the speaker as a
> mic??? I don't know it it would work, but I2C is a powerful interface. I
> think someone should consider it. I would even build a prototype if I
> could get the chips and a driver made.
> __/|
> _________ _______/\/\___________| ||
> D___| |_______/\/\___| ____| || Speaker
> C___| Paralel |_______/\/\___| / |__||
> G___| I2C |_______/\/\___| - \|
> |interface|__|<__ _____
> +___| chip |__>|__| |
> -___| |______|Amtel| Memory chip
> |_________|______|_____|
> | |
> + -
>
> A buffer may be necesary to run the memory chip and the speaker, to keep
> signals flowing directly. The speaker may need a latching chip to keep
> it from clicking between reads and writes, but it could be possible.
>
>
> Richard Piotter
>
> e-mail: richfiles@hotmail.com
>
> home page: <A
>
HREF="http://www.geocities.com/SiliconValley/Lakes/5081/Richfiles.html">The
> Richfiles</A>
>
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