XPost: comp.sys.atari.8bit   
   From: michael@mcurrent.name   
      
   To follow up, here's what I think I've figured out.   
      
   The Transfer Utility Ben mentioned comes with ST Xformer, the 8-bit Atari   
   emulator for the Atari ST.  ST Xformer doesn't recognize .ATR image files,   
   the most common Atari 8-bit disk image file format by far, so this   
   complicates things for someone in Ben's situation (with an ST, but no PC   
   handy).   
      
   Ben thought he needed image files in the .SD or .DD formats in order for   
   them to be recognized by ST Xformer, so he could use this Transfer Utility   
   to get them to the 8-bit.  I had never heard of .SD or .DD.  But I just   
   found this in the README that comes with the ST Xformer 3.0 sources:   
      
   "The disk format used by Xformer is "XFD" (Xformer Floppy Disk) also known   
   earlier as .SD or .DD depending on the density. In Xformer 2.4 I added the   
   ability to access pretty well any size disk image, so the extension XFD was   
   picked to be a generic case. The XFD format is quite simple. It is just a   
   sector dump of a real 8-bit drive. Take the number of sectors on the disk   
   and multiply by the sector size (128 or 256) and that is the size of the   
   XFD   
   file. No headers, no extra info."   
      
   So that answers the .SD and .DD question, they're just .XFD!   
      
   Furthermore, I just rediscovered a utility that runs on the ST that   
   converts .ATR to .XFD image files.  "ATR to XFD 1.0" for the ST by Miro   
   Kropacek (MiKRO) is available at:   
   http://mikro.atari.org/   
      
   So, I hope this is helpful to Ben, and any others following along.   
      
   Let me know if there's still more to this story than this!   
      
   -Michael   
   --   
   Michael Current  ~  michael@mcurrent.name  ~  http://mcurrent.name/   
   8-bit Atari FAQ/Vendor Lists: http://www.faqs.org/faqs/atari-8-bit/   
   St. Paul Atari Computer Enthusiasts: http://space.atari.org/   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)