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<div style="font-family: Verdana, Geneva, sans-serif; font-size: 10pt; color: rgb(0, 0, 0);" class="elementToProof">
And there are additional notes in the March 1991 Elektor magazine!</div>
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<br>
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<div style="font-family: Verdana, Geneva, sans-serif; font-size: 10pt; color: rgb(0, 0, 0);" class="elementToProof">
Ciao<br>
Peter</div>
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<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>Von:</b> Synth-diy <synth-diy-bounces@synth-diy.org> im Auftrag von Ullrich Peter via Synth-diy <synth-diy@synth-diy.org><br>
<b>Gesendet:</b> Mittwoch, 28. September 2022 23:19<br>
<b>An:</b> S Ridley <spridley1@gmail.com><br>
<b>Cc:</b> synth-diy@synth-diy.org <synth-diy@synth-diy.org><br>
<b>Betreff:</b> *EXT* Re: [sdiy] Identification of an unknown MIDI CV interface</font>
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<div class="x_elementToProof" style="font-family:Verdana,Geneva,sans-serif; font-size:10pt; color:rgb(0,0,0)">
Hi Steve!</div>
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<br>
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<div class="x_elementToProof" style="font-family:Verdana,Geneva,sans-serif; font-size:10pt; color:rgb(0,0,0)">
Thank you for the hint. I built this PCB lots of years ago and used it for a midi controller (doesn't exist any longer).</div>
<div class="x_elementToProof" style="font-family:Verdana,Geneva,sans-serif; font-size:10pt; color:rgb(0,0,0)">
I just had a look on the Elektor Collection CD - yes the article is stored there as PDF. About 1MB.</div>
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<div class="x_elementToProof" style="font-family:Verdana,Geneva,sans-serif; font-size:10pt; color:rgb(0,0,0)">
Ciao<br>
Peter</div>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>Von:</b> Synth-diy <synth-diy-bounces@synth-diy.org> im Auftrag von S Ridley via Synth-diy <synth-diy@synth-diy.org><br>
<b>Gesendet:</b> Mittwoch, 28. September 2022 22:59<br>
<b>Cc:</b> synth-diy@synth-diy.org <synth-diy@synth-diy.org><br>
<b>Betreff:</b> *EXT* Re: [sdiy] Identification of an unknown MIDI CV interface</font>
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<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>
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<br>
<div class="x_x_gmail_quote">
<div dir="ltr" class="x_x_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="x_x_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="https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fstudiorepair.com%2Fgallery%2FDoepfer%2FMCV1%2Fslides%2FDoepfer_MCV1_PCB_CS__STUDIOREPAIR_08031701_0803193972.html&data=05%7C01%7CPeter.Ullrich%40kapsch.net%7C97a8fc89cdae43fd641a08daa197aa26%7C5f9ce5277e3e4e83a8a4b6c848f85ab5%7C1%7C0%7C637999970009563394%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=iOarnf%2BlHy6bQrJlYCtrNjitRC3cgQlYB6RxFlq725Q%3D&reserved=0" originalsrc="http://studiorepair.com/gallery/Doepfer/MCV1/slides/Doepfer_MCV1_PCB_CS__STUDIOREPAIR_08031701_0803193972.html" shash="WZGsE1dSRMUVFbV+C5LFrtPaPxG/1v3vuzmD5av4Jye+o0MyOAFS8QzXKZw5FYs8l1sV0k2Abn99VZkJBOyVHiD0K9iaNAxPwxD4cCMfzSBsRsDXOlNWT0Utbd28DbhBvrkwA4k7+6BAt1cAHFf2PhmZEzUEVPxJ1ql5z5t/am4=" originalsrc="http://studiorepair.com/gallery/Doepfer/MCV1/slides/Doepfer_MCV1_PCB_CS__STUDIOREPAIR_08031701_0803193972.html" shash="E2PoBM9/ljF7yXqfj406hE2WT3F+/GBhMYIl1cXuTssFidKSWuhiDroVhzJU8Ssnu3Zp8WzEgAes0lmqziq9IiR0YPfOMU4f0lnWoDZx/t5z/K+HK/22U7F4Ai/LUqbROcPxTmFXSiLLL5OLHu7gQ8MBhlvLgh9K+ebnY0d1PQQ=" target="_blank">http://studiorepair.com/gallery/Doepfer/MCV1/slides/Doepfer_MCV1_PCB_CS__STUDIOREPAIR_08031701_0803193972.html</a></p>
<p><a href="https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdoepfer.de%2Falte_anl.txt%2FMCV1_V1.txt&data=05%7C01%7CPeter.Ullrich%40kapsch.net%7C97a8fc89cdae43fd641a08daa197aa26%7C5f9ce5277e3e4e83a8a4b6c848f85ab5%7C1%7C0%7C637999970009563394%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=nf89ck3a4%2FGFLsbNdZUA%2Blhi0auYOJgNz0DOpKJ0EWE%3D&reserved=0" originalsrc="https://doepfer.de/alte_anl.txt/MCV1_V1.txt" shash="lPUEX3d6CQKDHzM4GT5D6+8pOesWQIHR/WYcjQ3/RB6TU4U7Y8vC8cXrxsaZwjKBrUqBnBKh49xwPVwI/tBI2LAnhXTIhDITvTVzk4uW4EH9Ra+UaLjB32whLbWzx6GWxZvU1DeogOBuU7RO0QEW1s1TJr10G3RLjNuM/aW4cRc=" originalsrc="https://doepfer.de/alte_anl.txt/MCV1_V1.txt" shash="xQGqjxi9nRiYqOY4/7ZkhkzvT+0JKwjOgHvUCy7IkqYsNozi+kKsFDFSxgTSfN9q/geC+MBll3dmWM17jrgzr+VBn9Iw2EbW31Ea8az/dlyi0rqsA6Hj/+PWXcWykd/yFL6o16M88hngylfyf+dEfaKSMMOI3qheo7bnlp4oXdo=" target="_blank">https://doepfer.de/alte_anl.txt/MCV1_V1.txt</a></p>
<p><a href="https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.pc1ha.franken.de%2Fhabel%2Fmusik_03.htm&data=05%7C01%7CPeter.Ullrich%40kapsch.net%7C97a8fc89cdae43fd641a08daa197aa26%7C5f9ce5277e3e4e83a8a4b6c848f85ab5%7C1%7C0%7C637999970009563394%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=%2FbQ4bZMTHRWPirGqke6pOPtFgobASM2A0WxQ3%2Fvhuf0%3D&reserved=0" originalsrc="http://www.pc1ha.franken.de/habel/musik_03.htm" shash="yLr+g8eDGXdxy28NAMfctcKGGl7OKdoDvujyhjS4TQW7qLaF06scxEQHIaoEQjdnI5wHeZ9+m1Hr16/XE+rxGy2CFFABaf3CoH854tHsbA+v5qedrTSg6Xt3x6IV3QevHFqTD0AQc+m9K/Qt2RNFmggFyd5jYdoX7ftv29mRmcE=" originalsrc="http://www.pc1ha.franken.de/habel/musik_03.htm" shash="EuAZq5fLRgFaD9p2gMeun9mYr3qHUPRXe9iP/xg1Y2tWCMqm7k6CSaLA16/EW9yoN/DkKhPM2wjT110S90+FP+q4kGuu9SGpmeJVUArgydC9ksw1bQhohwsRitdNU9rkmycUtH6+iO/4vJ8hfskN445ccKQ7E7yaQwUgjr2GClk=" 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="x_x_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="x_x_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="x_x_MsoNormal"><b><span lang="EN-US" style="font-size:10pt; font-family:Tahoma,"sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10pt; font-family:Tahoma,"sans-serif""> 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="x_x_MsoNormal"><u></u> <u></u></p>
<div>
<p class="x_x_MsoNormal">Hi all,<u></u><u></u></p>
</div>
<div>
<p class="x_x_MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="x_x_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="x_x_MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="x_x_MsoNormal"><u></u> <u></u></p>
</div>
<blockquote style="margin-top:5pt; margin-bottom:5pt">
<div>
<p class="x_x_MsoNormal"><a href="https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fflorian-anwander.de%2Fmoog_prodigy%2FUnknown_Midi_Interface.jpg&data=05%7C01%7CPeter.Ullrich%40kapsch.net%7C97a8fc89cdae43fd641a08daa197aa26%7C5f9ce5277e3e4e83a8a4b6c848f85ab5%7C1%7C0%7C637999970009563394%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=QtphBU94OuSjpB03jgmdH%2FOqarUknTjtz4CxrnItuRk%3D&reserved=0" originalsrc="https://florian-anwander.de/moog_prodigy/Unknown_Midi_Interface.jpg" shash="yJCLeOFKLHsQf/9ov8fz6lE5LUNY3S7EnWzveoVIecD9o2wU5WGj6o/WHBwzmqVmaRZfTYsSVlc07w9/CHze8aqbBwLfEKtKMLofQtFe6Ll3Cv1hJ+p5QvLDSfflv21vp/boqeL9OvjhnGXo9mQVVySQ/1ea/7QplPJXwFODsGY=" originalsrc="https://florian-anwander.de/moog_prodigy/Unknown_Midi_Interface.jpg" shash="Pkj2GOUcQDICUosuR+jCyvh2MeJdSEk0UFOWb+GwhRWvBJ0dTJWpZl5/TgydVruLj699/EsfsBaUHKg+SA8oom4xOXqs6uz1BbNm6bVOfgYYD8cFsyxiczUNy2U87bjndhXc/i1Qwl/PxmSY8eDCrwBKoaQCnaR2Nun6+7kuo5A=" 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>
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</blockquote>
</div>
<p class="x_x_MsoNormal"><u></u> <u></u></p>
<div>
<p class="x_x_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>
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