From: address@nospicedham.not.available   
      
   Bill,   
      
   >   cmd_findfl db 'findfl',0   
   >   
   > is commented out the problem goes away.   
      
   Have you already tried what happens when you just comment *that* line out   
   (and leave the ones following it enabled) ?    My guess is that the   
   same/similar problem will occur   
      
   js2nd dw 0x9e0 ;segment at end of jsec2   
   ...   
   mov word[si+6],js2nd  ;segment - where to load sectors   
      
   My assembler complains about that: you cannot do a direct memory-to-memory   
   copy that way (needs to go thru a register).   Your assembler might be using   
   the address of js2nd (and not its contents), which would mean that you are   
   loading a sector over all the variables that follow (including the drive   
   letter).   
      
   Did you maybe intended to use "equ" (or something like it) there (like   
   "js2nd equ 0x9e0" or "js2nd = 0x9e0") ?   
      
   Another possibility is that you are somehow trashing the stack.   
   Could your stackpointer be pointing into the same area where you are loading   
   your sector ?   
      
   Regards,   
   Rudy Wieser   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)