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It did have a JL cooper kit installed when I got it. It was crashing with it installed so I took it out. <br>I put new epRoms in as it arrived with no EPROMs installed. I’m thinking maybe I need to try a new set. Possibly a new Z80 too,<br><br><a href="https://overview.mail.yahoo.com/?.src=iOS">Sent from Yahoo Mail for iPhone</a><br><br><p class="yahoo-quoted-begin" style="font-size: 15px; color: #715FFA; padding-top: 15px; margin-top: 0">On Sunday, May 1, 2022, 2:47 AM, ulfur hansson <ulfurh@gmail.com> wrote:</p><blockquote class="iosymail"><div id="yiv7169644442"><div>do you have the original processor or midi kit installed? i know mine has been much more unstable since i added midi - no clue as to why though. squirrely notes, unreliable patch memory etc...<div><br clear="none"><div dir="ltr">sent from outer space</div><div dir="ltr"><br clear="none"><blockquote type="cite">On 1 May 2022, at 00:22, al spitzley via Synth-diy <synth-diy@synth-diy.org> wrote:<br clear="none"><br clear="none"></blockquote></div><blockquote type="cite"><div dir="ltr">
Worth checking, but no, the memory protect is not engaged. But it is definitely the kind of thing that’s tripped me before!<br clear="none"><br clear="none"><br clear="none"><a rel="nofollow noopener noreferrer" shape="rect" target="_blank" href="https://overview.mail.yahoo.com/?.src=iOS">Sent from Yahoo Mail for iPhone</a><br clear="none"><br clear="none"><p style="font-size:15px;color:#715FFA;padding-top:15px;margin-top:0;" class="yiv7169644442yahoo-quoted-begin">On Saturday, April 30, 2022, 5:07 PM, Peter Pearson <electrocontinuo@gmail.com> wrote:</p><blockquote class="yiv7169644442iosymail"><div id="yiv7169644442"><div><div dir="ltr">Serious question, not being flippant - do you have the memory protect engaged? If I had one American dollar for every time I've gotten sidetracked by something dumb like that myself...</div><br clear="none"><div class="yiv7169644442gmail_quote"><div id="yiv7169644442yqt96766" class="yiv7169644442yqt5168327632"><div dir="ltr" class="yiv7169644442gmail_attr">On Sat, Apr 30, 2022 at 7:31 PM al spitzley via Synth-diy <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:synth-diy@synth-diy.org" target="_blank" href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</a>> wrote:<br clear="none"></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;" class="yiv7169644442gmail_quote"><div><div style="font-family:Helvetica, Arial, sans-serif;font-size:13px;"><div dir="ltr">Hello all,</div><div dir="ltr"><div>So I am working on a DOA OBxa. I've got it up and running after power supply rebuild and a lot of troubleshooting.<br clear="none">
Now I'm stumped with a couple of issues that could be related to each other.<br clear="none">
<br clear="none">
Firstly when I enable the cassette mode it doesn't seem to go into the
mode. The Cassette LED does light, but the other LEDS do not go out. The
Play button or seemingly any other button are non responsive.<br clear="none">
<br clear="none">
Secondly when I write a patch to load the patch I have to hold the
relevant Program button. As soon as I release the button the patch
disappears.<br clear="none">
Scoping the power rails shows a significant amount of noise. If I
disable the clock the noise goes. I've tried replacing numerous ICs
around the CPU, including rebuilding the clock but still there is a
bunch of noise. I'm hoping this noise is causing the issues I've
mentioned but am struggling to work out what is causing it. Or maybe
that is not the problem?<br clear="none">
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Any ideas greatly appreciated. <br clear="none"></div><div dir="ltr">Thank you!<br clear="none"></div></div></div></div></div>_______________________________________________<br clear="none">
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