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You cannot dd, as that goes through the PC controller that, likely, cannot read the disks.
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.
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.
Shachar
On 23/12/2021 04:56, Steve Litt wrote:
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 http://www.troubleshooters.com/techniques _______________________________________________ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il |
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