From: gids.rs@sasktel.net   
      
   > > > 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. :-)   
      
      
   I was taking Antoine's comment of T1/SB/01 as the location of the VTOC within   
   DOS.  Unless that was a typing error and was supposed to be T11/SB/01, in   
   which case it has a different meaning.   
      
   The value of Track 17 Sector 0 for the VTOC is stored somewhere in Tracks 0-2   
   which is usually DOS, unless the disk is DOSless.  The question I was asking   
   Antoine was, is the VTOC Track/Sector number in the same location for all   
   versions of DOS including    
   third party DOSes that one can use a standard routine to find the VTOC without   
   assuming it is always Track 17.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)