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Thread: All about DSKs

  1. #11
    Join Date
    Mar 2012
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    Augusta, Georgia, USA
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    MMCPM232.DSK boots fine in TRS32. It may be something about the old DOS emulator where it's not interpreted correctly.

  2. #12

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    It appears to me that the MMCPM232.DSK file is in DMK format, while the ld4-631.dsk file is in JV3 format.
    Descriptions of the formats can be found here:
    https://www.tim-mann.org/trs80/dskspec.html
    and here:
    http://www.classiccmp.org/cpmarchive...ical-DMK-disks

    There is (at least) one other common format, and that is JV1 (description in the first link above).

    In my experience, TRS80 related .DSK files are generally in one of these 3 formats.
    Best of Luck!

  3. #13
    Join Date
    Feb 2015
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    Cleveland, OH, USA
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    Quote Originally Posted by GeoffB17 View Post
    I've had a look at the two images, and they could be different in structure, but not THAT different. But, if one loads, and the other does not, then I'll accept that they are too different.

    However, be advised, if you are trying two different formats of .DSK file, then there is a third type that is REALLY different. The Amstrad CPC (and PCW machines) makes use of it's own .DSK format, at least this format includes a header which specifically refers, in ASCII text, to CPC EMU or CPC EMU EXTENDED, so you can see immed what it is.

    Geoff
    I had to leave off the ASCII due to size limitations of the images, but the ASCII really shows the difference between the two files. I was hoping there would be a header explaining something, as with a Dunfield IMD file, but that does not appear to be the case.

    For whatever reason the LS-DOS file loads and the other does not. At least on this (Reed's) emulator.

    Thank you for your observations. Learning as I go.

    -CH-

  4. #14
    Join Date
    Feb 2015
    Location
    Cleveland, OH, USA
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    Quote Originally Posted by kizmit99 View Post
    It appears to me that the MMCPM232.DSK file is in DMK format, while the ld4-631.dsk file is in JV3 format.
    Descriptions of the formats can be found here:
    https://www.tim-mann.org/trs80/dskspec.html
    and here:
    http://www.classiccmp.org/cpmarchive...ical-DMK-disks

    There is (at least) one other common format, and that is JV1 (description in the first link above).

    In my experience, TRS80 related .DSK files are generally in one of these 3 formats.
    Best of Luck!
    That explains a lot. Thanks for your reply.

    -CH-

  5. #15
    Join Date
    Feb 2015
    Location
    Cleveland, OH, USA
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    Quote Originally Posted by rittwage View Post
    MMCPM232.DSK boots fine in TRS32. It may be something about the old DOS emulator where it's not interpreted correctly.
    I'll give it a shot; I realized yesterday that it would be handy to run an emulator on the Windows 10 machine as well. Thanks for your suggestion.

    -CH-

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