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  1. The IOPL directive controls whether the system will allow programs
  2. containing IOPL segments to be loaded.  Such segments are used by
  3. programs which access the hardware directly.  System security can be
  4. improved by placing the directive IOPL=NO in CONFIG.SYS.
  5.  
  6. Directive syntax:    IOPL = YES|NO
  7.             or
  8.             IOPL = pathname[,pathname...]
  9.  
  10. Default value:        No
  11.  
  12. Multiple occurrences:    Yes (of second form)
  13.  
  14. Affects protected mode:    Yes
  15.             
  16. Affects real mode:    No
  17.  
  18. Example:        IOPL = NO  or  IOPL = C:\OS2\CVP.EXE
  19.  
  20.