Re: DSK image file format

["Charlie" <charlied@NOSPAMbboard.com>]

"Eric" <lonewolf@hotmail.com> wrote in message
3f8494f1@dnews.tpgi.com.au">news:3f8494f1@dnews.tpgi.com.au...
> Hi all,
>
> Where can I find .DSK file format? I don't know any program that uses
> CatWeasel card to write Apple II's .dsk file format to disk on PC. I would
> like to find out the file format and see if it can be done.
>
> Any related info would be appreciated.
>

Unfortunately, there isn't just one format for .DSK images, but most are 143360
bytes long and consist of just the data from the original sectors of a real 35
track, 16 sector/track disk.
The image data is already decoded on the image so there is exactly 256
bytes/sector and 512 bytes/block.
Some of the .DSK images use DOS ordered skewing of the sectors and others use
ProDOS order skewing which allows the blocks to be read in numerical order.

You can find more information at:

http://www.cs.uu.nl/wais/html/na-dir/apple2/emulators-faq/part1.html

http://www.zip.com.au/~alexm/faq/

Charlie