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#
#  $Id$
#
#  COPYRIGHT (c) 1989-1998.
#  On-Line Applications Research Corporation (OAR).
#  Copyright assigned to U.S. Government, 1994.
#
#  The license and distribution terms for this file may be
#  found in the file LICENSE in this distribution or at
#  http://www.OARcorp.com/rtems/license.html.
#


This file describes the directives and concepts tested by this test set.

test set name:  test21

directives:
  ex_init, ex_start, t_create, t_start, tm_tick, i_return, t_delete
  de_init, de_open, de_close, de_read, de_write, de_cntrl

concepts:

  a.  Verifies all I/O manager directives always return successful for
      null drivers.

  b.  Verifies all I/O manager directives call and return from the driver
      entry points in the driver address table.