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<p>You cannot dd, as that goes through the PC controller that,
likely, cannot read the disks.</p>
<p><br>
</p>
<p>CPM is an operating system that was ported to many very different
platforms, and those did not maintain compatible disk formats on
the very lowest levels.</p>
<p><br>
</p>
<p>There are devices today, as part of the retro computing movement,
that can read, pretty much, anything. I don't have any relevant
links, but I know of a collector who might be able to help you
out. Contact me off-list and I'll see if I can connect you.</p>
<p><br>
</p>
<p>Shachar</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 23/12/2021 04:56, Steve Litt wrote:<br>
</div>
<blockquote type="cite"
cite="mid:20211222215659.71164a81@mydesk.domain.cxm">
<pre class="moz-quote-pre" wrap="">Hi all,
Anyone have any ideas how to read (and obviously back up) my CPM 5.25
diskettes left over from my Kaypro 2x CPM machine used 1984-1987?
Somewhere I have a normal IBM PC compatible 5.25 drive, but CPM
floppies had different formatting, I think both in software and in the
iron oxide.
I'm thinking if I can ddrescue these things to a file, and loop-mount
them using some sort of CPM format (didn't the mount command used to be
able to do that?), maybe I could get the info into a file
representation instead of a drive representation.
Thanks,
SteveT
Steve Litt
Spring 2021 featured book: Troubleshooting Techniques of the Successful Technologist
<a class="moz-txt-link-freetext" href="http://www.troubleshooters.com/techniques">http://www.troubleshooters.com/techniques</a>
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</pre>
</blockquote>
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