From: thefadden@gmail.com   
      
   On Wednesday, November 2, 2022 at 3:16:19 PM UTC-7, gid...@sasktel.net wrote:   
   > > If I may, block 88 can be changed to getting the value of T1/SB/01. It   
   contains the track of the VTOC. Using it allows to handle VTOC that are not on   
   T11.   
   > >   
   > > Antoine   
   > Is this part of DOS and is it the same for all versions of DOS? Including   
   DOS3.2 and Third Party DOS's?   
      
   DOS: track 17 sector 0 holds the VTOC.  Everything else is potentially   
   variable.   
      
   ProDOS: block 2 holds the start of the volume directory.  Everything else is   
   potentially variable.   
      
   Most disks follow the standard pattern: track 17 is a full catalog track,   
   ProDOS has 4 volume directory blocks followed by the bitmap.  Detecting "most   
   disks" isn't the interesting part of the problem though. :-)   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)