Re: TI-H: 16 bit sound on 92
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Re: TI-H: 16 bit sound on 92
The TI83 has a display driver, and updates the screen slower. I think that
might not work as well. Wouldn't the sound take lots oc CPU time making
the game slower?
Grant
>would a shift register work. Set it up to count every cycle of the
>screen and count a certain number of bits. Only 16 dots would be needed
>to do it, if the screen refresh is fast enough, and a line or square in
>the corner could do the work unobtrusively. Even if you needed to use
>more data than that, you could just reserve the 4 columns or whatever is
>required. It might require an AVR or PIC even, but a standard format for
>high quality stereo sound output on any calc would be nice. If you're
>using an AVR or PIC, it might even be possible to reserve some other
>lines for tone data generated by a hardware or software (on the Micro)
>waveform generator! Programs could be identified as 16-bit ready and it
>wouldn't impair link functions or anything. You would be including the
>data allong withthe screen data, so there would be no need to switch
>internal ports, AND would also free up the link so sound and link play
>could be done simultaneously!
>
>>
>>
>>I thought of that idea once but doesn't it need complicated circuitry
>to
>>decode the screen info?
>>
>>
>>Muhammed
>>
>>
>>>
>>>
>>>I had an idea the other day for 16 bit sound on the 92 or any calc
>with
>>>a screen connector. If anyone knows how the TI sends data over the
>>>link, you could possibly use one or two columns on the screen to
>>>transmit sound data to a DAC. A simple sound device could be built
>>with
>>>some resistors like this (4 bit example):
>>>0 1 2 3
>>>| | | |
>>>| | | |
>>>|-/\/\-|-/\/\-|-/\/\-|--- output
>>>
>>>You might need another resistor or capacitor in there somewhere.
>>>
>>>--
>>>Jonathan Anderson
>>>sarlok@geocities.com
>>>
>>>"I can't be wrong - my modem is error correcting."
>>>
>>
>>
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