<html><body><span style="font-family:Verdana; color:#000; font-size:10pt;"><div>So I remember first being exposed to the SN76477 via Omni Magazine in what must have been sometime from about 1978-1980. We are offering a $25 store gift certificate to the first person to send us the article (or a link to it)-- i vaguely remember breadboarding a simple circuit with the SN76477 on Radio Shack breadboard... </div><div><br></div><div>Anyway, other than the Thomas Henry SN Voice and Supercontroller, I haven't seen many (or any) modular synth designs that use the chip... wondering why? </div><div><br></div><div>They're still plentiful and relatively cheap given the range of capabilities... maybe we'll sponsor a module design contest around the SN76477 to see what emerges... </div>
<blockquote id="replyBlockquote" webmail="1" style="border-left: 2px solid blue; margin-left: 8px; padding-left: 8px; font-size:10pt; color:black; font-family:verdana;">
<div id="wmQuoteWrapper">
-------- Original Message --------<br>
Subject: Re: [sdiy] TI 76477 Space Invaders sound chip detailed analysis<br>
From: Tim Parkhurst <<a href="mailto:tim.parkhurst@gmail.com">tim.parkhurst@gmail.com</a>><br>
Date: Wed, May 23, 2018 2:33 am<br>
To: cheater00 cheater00 <<a href="mailto:cheater00@gmail.com">cheater00@gmail.com</a>><br>
Cc: synth-diy mailing list <<a href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</a>><br>
<br>
<div dir="ltr">You should also check out what the amazing Thomas Henry managed to do with the 76477. Even got a few octaves of CV response from it.<div><br></div><div><a target="_blank" href="http://www.birthofasynth.com/Thomas_Henry/Pages/SN-Voice_main.html">http://www.birthofasynth.com/Thomas_Henry/Pages/SN-Voice_main.html</a><br></div><div><br></div><div><br></div><div><br></div><div>Tim (if I had a quarter for every 76477-powered video game I played...) Servo</div><div class="gmail_extra"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><br><br><br><br></div></div></div></div></div> <br><div class="gmail_quote">On Tue, May 22, 2018 at 9:16 PM, cheater00 cheater00 <span dir="ltr"><<a href="mailto:cheater00@gmail.com" target="_blank">cheater00@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>I've just found this while surfing the internet, an analysis of the 76477 sound chip's digital sound circuits. This includes the unique shift-register based noise circuit, as well as the noise filter circuit (which is analog):</div><div><br></div><span><a href="http://www.righto.com/2018/05/inside-76477-space-invaders-sound.html" target="_blank">http://www.righto.com/2018/05/<wbr>inside-76477-space-invaders-<wbr>sound.html</a></span><div><span><br></span></div><div><span>Here's an earlier anysis of the analog circuitry:</span></div><div><span><br></span></div><div><span><a href="http://www.righto.com/2017/04/reverse-engineering-76477-space.html" target="_blank">http://www.righto.com/2017/04/<wbr>reverse-engineering-76477-<wbr>space.html</a><br></span></div><div><span><br></span></div><div><span>I wonder if anyone has tried cloning the chip for synth use, with modern features like eg tuning.</span></div> <br>______________________________<wbr>_________________<br> Synth-diy mailing list<br> <a target="_blank" href="mailto:Synth-diy@synth-diy.org">Synth-diy@synth-diy.org</a><br> <a href="http://synth-diy.org/mailman/listinfo/synth-diy" rel="noreferrer" target="_blank">http://synth-diy.org/mailman/<wbr>listinfo/synth-diy</a><br> <br></blockquote></div><br></div></div> <hr>_______________________________________________<br>
Synth-diy mailing list<br>
<a href="mailto:Synth-diy@synth-diy.org">Synth-diy@synth-diy.org</a><br>
<a href="http://synth-diy.org/mailman/listinfo/synth-diy">http://synth-diy.org/mailman/listinfo/synth-diy</a><br>
</div>
</blockquote></span></body></html>