"Michael Pender" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Hello, > > I'm thinking about adding DSK format support to a program I wrote. Can > anyone direct me to a specification for the most current version of the > file format? > > I've read the FAQ, but I need to know the internals of the format, e.g. > what fields are present, sector ordering, etc.
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. Charlie Steve Conrad 810 Main Henrietta, MO 64036 816-494-5692 http://sasha91.0pi.com www.fortunecity.com/rivendell/stonekeep/600 It is no secret (nor should it come as any surprise) that humankind's most noble impulses often surface during the most trying of times, that human spirit rises to the challenge when faced with adversity, that human strength is born from human failings...Is it any wonder, then, that the SDF-1 crew became a tighter family after the fortress had been exiled than it had before? From the log of Captain (later Admiral) Henry Gloval -- Apple2list is sponsored by <http://lowendmac.com/> and... / Buy books, CDs, videos, and more from Amazon.com \ / <http://www.amazon.com/exec/obidos/redirect-home/lowendmac> \ Support Low End Mac <http://lowendmac.com/lists/support.html> Apple2list info: <http://lowendmac.com/lists/apple2.html> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/apple2list%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
