<div dir="ltr"><br><div>It was also published in Elektor, February 1991, but with a different pcb layout.</div><div><br></div><div><br></div><div>Steve</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, 28 Sept 2022 at 12:12, René Schmitz <<a href="mailto:synth@schmitzbits.de">synth@schmitzbits.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>Hi all,<br>
</p>
<p><br>
</p>
<p>I've goggled a bit and it seems this is a clone of the Doepfer
MCV1, which apparently was published as a set of articles in <br>
</p>
<p>the German Magazine "Funkschau".</p>
<p><a href="http://studiorepair.com/gallery/Doepfer/MCV1/slides/Doepfer_MCV1_PCB_CS__STUDIOREPAIR_08031701_0803193972.html" target="_blank">http://studiorepair.com/gallery/Doepfer/MCV1/slides/Doepfer_MCV1_PCB_CS__STUDIOREPAIR_08031701_0803193972.html</a></p>
<p><a href="https://doepfer.de/alte_anl.txt/MCV1_V1.txt" target="_blank">https://doepfer.de/alte_anl.txt/MCV1_V1.txt</a></p>
<p><a href="http://www.pc1ha.franken.de/habel/musik_03.htm" target="_blank">http://www.pc1ha.franken.de/habel/musik_03.htm</a></p>
<p><br>
</p>
<p>Best,</p>
<p> René<br>
</p>
<p><br>
</p>
<p><font face="Comic Sans MS" color="#FFFFFF">BestJürk Habel und
Dieter Do</font></p>
<p><font face="Comic Sans MS" color="#FFFFFF">epfer, MIDI-Interface
für Oldtimer, Funkschau Hefte 9/89, 10/89 und 11/89,
Franzis-Verlag, München</font></p>
<div>Am 28.09.2022 um 12:36 schrieb Mike
Bryant:<br>
</div>
<blockquote type="cite">
<div>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,"sans-serif";color:rgb(31,73,125)">Maybe
the original design on the etched PCB was a general purpose
MIDI board (hence the matching firmware) and provided an 8
bit GPIO port, but disobeyed the rules and omitted the
opto-isolator, so whoever used it added that as well as the
DAC they needed for this design on the perfboard.
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,"sans-serif";color:rgb(31,73,125)"><u></u> <u></u></span></p>
<div>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(181,196,223);padding:3pt 0cm 0cm">
<p class="MsoNormal"><b><span style="font-size:10pt;font-family:Tahoma,"sans-serif"" lang="EN-US">From:</span></b><span style="font-size:10pt;font-family:Tahoma,"sans-serif"" lang="EN-US"> Synth-diy
[<a href="mailto:synth-diy-bounces@synth-diy.org" target="_blank">mailto:synth-diy-bounces@synth-diy.org</a>]
<b>On Behalf Of </b>René Schmitz<br>
<b>Sent:</b> 28 September 2022 11:29<br>
<b>To:</b> <a href="mailto:synth-diy@synth-diy.org" target="_blank">synth-diy@synth-diy.org</a><br>
<b>Subject:</b> Re: [sdiy] Identification of an unknown
MIDI CV interface<u></u><u></u></span></p>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<p class="MsoNormal">Hi all,<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">On 28.09.2022 11:30, Ingo Debus via
Synth-diy wrote:<u></u><u></u></p>
</div>
<blockquote style="margin-top:5pt;margin-bottom:5pt">
<div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<blockquote style="margin-top:5pt;margin-bottom:5pt">
<div>
<p class="MsoNormal"><a href="https://florian-anwander.de/moog_prodigy/Unknown_Midi_Interface.jpg" target="_blank"><span style="font-size:10.5pt;font-family:Helvetica,"sans-serif"">https://florian-anwander.de/moog_prodigy/Unknown_Midi_Interface.jpg</span></a><u></u><u></u></p>
</div>
</blockquote>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<p class="MsoNormal">The etched PCB looks like a general
purpose board. The MIDI stuff and the DAC are on the perf
board.<u></u><u></u></p>
</div>
</blockquote>
<p>That's what I was thinking too, but what is interesting is
that the logo on the EPROM matches the one on the board.
<u></u><u></u></p>
<p>So Hardware and Firmware seem to be from the same origin.<u></u><u></u></p>
<p>But the rest seems very bespoke and has a high home brew
appeal. This doesn't quite fit to me, because who
<u></u><u></u></p>
<p>ever wrote the firmware would know what hardware to drive.<u></u><u></u></p>
<p><u></u> <u></u></p>
<p><u></u> <u></u></p>
<p>Best,<u></u><u></u></p>
<p> René<u></u><u></u></p>
<p><u></u> <u></u></p>
<pre>--<u></u><u></u></pre>
<pre><a href="mailto:synth@schmitzbits.de" target="_blank">synth@schmitzbits.de</a><u></u><u></u></pre>
<pre><a href="http://schmitzbits.de" target="_blank">http://schmitzbits.de</a><u></u><u></u></pre>
</div>
</blockquote>
</div>
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