Re: DSK format specification

["Bill Garber" <willy46pa@comcast.net>]

"Charlie" <charlied@NOSPAMbboard.com> wrote in message
beppol026me@enews2.newsguy.com">news:beppol026me@enews2.newsguy.com...
>
> "Michael Pender" <mpender@hotmail.com> wrote in message
> news:rLOPa.250$Y%3.201@nwrddc03.gnilink.net...
> The "DSK" image format(images that have the extension ".dsk") doesn't seem
to
> have any written specifications.  As mentioned in Andy McFadden's post
some
> have different sector orders.  What is really confusing is that there are
some
> that use a different sector order than the one used by the operating
system on
> the disk.  In other words there are ProDOS DSK images with DOS order and
DOS
> 3.3 DSK images with ProDOS order as well as DSK images where the order
matches
> the OS.  ProDOS order means the blocks (512 bytes of unencoded data/block)
are
> arranged in numerical order.  DOS order is the skewed sector (256
bytes/sector)
> arrangement used by DOS 3.3.  Unfortunately, I have run across several DSK
> images that have headers (I have no idea how these are used).  Most "DSK"
> images are 143,360 bytes in length but again as Andy mentioned there are a
few
> that have more or less.

You all are making DSK too complicated. All they are is this.
Track 1, sector 1, byte 1 is byte 1 of the file, and so on each byte
from the disk is sequential in the file. Nothing more.

Bill @ GarberStreet Enterprises };-)
Web Site - http://garberstreet.netfirms.com
Email - willy46pa@comcast.net



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