Re: LF: TI-92 with sound...
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In a message dated 96-11-19 08:55:49 EST, you write:
> Not exactly. I just mean that program should send just characters with
> correct bit pattern like I showed there. Bitstream out of the port should
> look like 010101010101010101010101 or something.. If there is no delays or
> something between every 8 bits a some kind of noise 'signal' should come
> out of serial port. If ports speed is locked to that 9600bps, different
> frequencies (or noises with different tone :) could be done by sending
> according bit patterns like 000100010001000100010001. Anyhow, if that's
> possible, then it should be possible (if that serial port can drive a
> earphone without external amplifier) to make noises with a simple setup
> which consists of something like 2.5mm stereo plug, adjustable resistor
> for signal attenuation and earphones. This is quite a poor design but if
> it works, it would be easy to build and use. Sound quality stinks of
> course but who cares anyway if the other option is no sound at all..
>
Actually, I've been working on doing something like that. I have some mono:(
plugs that I got when I was trying to use an IR transmitter/Reciever for the
85. I'm going to try to take that and convert it to a bigger plug that I can
put into a mic. jack on a stereo (1-bit sound on a stereo. Now THAT's sad).
Then, I'll use FTerm to send a constant (or not so constant) stream of
10101010, 10001000, 11001100, etc and see how it sounds...
References: