TI-H: SF 92 and Expander SF II with sound
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TI-H: 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?
>
Ask Osma Suominen (?). Osma seems to be the I2C expert on the list, I
know alot about it, but Osma probably can answer more of your questions.
Basicly though, it is a simple interface where each device has an ID
code and you can connect multiple devices.
>----------
>> 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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>
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