Function 19h (25)        Get Current Disk
 
    Gets the drive number of the current default drive.
 
       On entry:      AH         19h
 
       Returns:       AL         Number of default drive (A = 0, B = 1, etc.)
 
  --------------------------------------------------------------------------
 
       Note:          The drive numbers returned by this function are one
                      less than the drive numbers used by many functions;
                      many functions use 0 for the default drive and start
                      with A = 1 (rather than A = 0).

Seealso:


 0Eh