[Coco] The .DSK format/structure

[Aaron Wolfe]

Most .dsk files for the Coco have no "format" at all.  They are just raw
data with no additional information of any kind.

There are a few .dsk files that use the "JVC" format.  For the most common
sized disk image, the jvc spec also happens to be just raw data with no
additional information.  If you encounter a .dsk with a file size *not*
evenly divisible by 256, chances are you have a JVC disk.  You can learn
about this here:  https://sites.google.com/site/dabarnstudio/jvc-disk-format
On Aug 22, 2014 10:56 AM, "Tony Cappellini" <cappy2112 at gmail.com> wrote:

> As as result of listening to Randy Kindig's floppy days podcasts,
> I'm now playing with an Apple II emulator and software. I've noticed that
> this emulator also reads .DSK images. But I'm fairly sure that the author
> of the emulator chose the .DSK extension as a convenience.
>
> I want to look at the differences between the Apple2 and coco .DSK images.
> Would someone point me to the following:
>
> 1. The specification for a coco .DSK image. Obviously, at some level this
> needs
>     to be the same as the floppy disk format for a physical floppy, but
> this     structure could also be embedded within a higher level structure
> of the file.
>
> 2. Software used for reading/writing coco .DSK images.
> 3. Source code for that reading/writing coco .DSK images
>
> I want to write a small program that will detect the image type and dump
> the contents of either disk image.
>
> Thanks
>
>
> Tony
>
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