[GreenKeys] Feeding ITTY to the teletype; simulating M33/35 teletypes hooked to computers like in the 70s

epvgk at limpoc.com epvgk at limpoc.com
Wed Aug 29 18:05:33 EDT 2012


On Wed, Aug 29, 2012 at 03:01:04PM -0700, William Bytheway wrote:
> RTTY.COM already has an ASCII telnet compatable interface for accessing the
> data stream.  Data transmitted via BAUDOT at 45.45 baud via streaming audio
> is echoed to the ports shown below.  In additon, the Autostart channel
> allows two way real time conversations.  This feature has been operating for
> several months.  The links below bring up a real-time JAVA applet
> application that allows one to monitor activity.
>  
> JAVA URL:  http://national.rtty.com/chat-national.html
> TELNET Port: 699
>  

This is obviously a much easier way to do it and trivial to implement
on anything with a TCP stack. I'm still happy to make the FFT demodulator
code available, (just need to clean it up a little) but grabbing the audio 
stream and demodulating it is just silly when you can just get the feed 
directly in ascii. 

If I get a little time this weekend I'll try making this work on the AVR. 
You shouldn't even need anything as fancy or expensive as an embedded linux
box to accomplish this. 

eric


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