Suggestions for imaging CP/M 8" disks or converting to 5.25" disks?

Bill Loguidice's picture

Nemesis and Orbquest (CP/M)Nemesis and Orbquest (CP/M)It would be great if someone had a way to image 8" disks either for use in an emulator or just copied over to another format 5.25" disks (it would take two to hold the contents of one 8" disk), say Kaypro format.

I recently came into possession of two very rare, complete CP/M games on 8" disk (Nemesis and Orbquest), and would love to make them available Web-wide. One is in an IBM disk format, and the other an unindicated format. The programs would work on any decent CP/M terminal, it's just getting them read by something and into a more usable format. The only 8" disk drives I have are for an S-100 add-on for an Exidy Sorcerer, which I have no software for.

Any thoughts/suggestions/assistance would be greatly appreciated. Thanks.

(Someone suggested this, but it's well beyond my technical expertise at this point.)

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Chris Kennedy
Chris Kennedy's picture
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Joined: 08/31/2008
Hmm

Bill -

The only nitty-gritty FDD stuff I have experience with comes from when I put a PC 3.5 FDD in the MSX and had to solder a cut-up ATAPI cable to the MSX motherboard. I certainly learned a good deal about the 3.5" drive interface (like what each one of those wires do...).

That link you provided looks interesting. I don't have the parts to put it together and test it, but the work looks doable.

I did see this: http://www.dbit.com/fdadap.html. I am not sure if it will help or not. I am unfamiliar with all of the different types of controllers, buses, etc in the 8" floppy disk world. I am assuming that if you can somehow use this board to interface with your 8" drives (again, I know nothing about the different 8" FD controllers & if your S-100 is in any way compatible), then you could hook it up to your PC.

You may also find this useful - http://www.faqs.org/faqs/CPM-faq/

Good luck!

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Bill Loguidice
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Joined: 12/31/1969
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Thanks, Chris, that (http://www.dbit.com/fdadap.html) certainly looks like a more doable option for me, as it involves less hacking. It's a shame it's $40 + supplies.

I'd just really like some type of guarantee that something will work, rather than just experimenting a great deal. I realize that's unlikely, though...

Marcus Bennet suggested this:
As documented here previously and more graphically on my blog ....

8" disks are pretty compatible with 5.25 HD diskettes in terms of number of tracks, sectors per track etc.

Then we noticed that 3.5" tri mode drives are too. Since 3.5" media is just about available I documented the move to 3.5" format diskettes.

Procedure to user 5.25" HD diskette drives
http://majzel.blogspot.com/2009/03/c...diskettes.html

Later Procedure to use 3.5" drives
http://majzel.blogspot.com/2009/04/c...ch-floppy.html

And then most importantly when you have the diskettes in 3.5" physical format it is a lot easier to use an IBM PC XT (as I do) to imagedisk these diskettes using the Dunfield Imaging Software . Which of course is
http://www.classiccmp.org/dunfield/img/

I still need to check the exact disk formats.

I realize it's a shot in the dark, but I'd really just love to get someone with a working 8" disk setup that can read this, then convert them for general usage.

Books!
Bill Loguidice, Managing Director | Armchair Arcade, Inc.

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Bill Loguidice
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Joined: 12/31/1969
They do indeed appear to be

They do indeed appear to be standard SS SD 8" disks. I have images of the disks though and the relevant instruction manual pages here (they can be enlarged by click "All Sizes"):

Nemesis:
http://www.flickr.com/photos/loguidice/3790021543/
http://www.flickr.com/photos/loguidice/3790835892/in/photostream/

Orbquest:
http://www.flickr.com/photos/loguidice/3790831766/in/photostream/
http://www.flickr.com/photos/loguidice/3790833434/in/photostream/

Books!
Bill Loguidice, Managing Director | Armchair Arcade, Inc.

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