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#

#  $Id: sp21.doc,v 1.6 1999/11/17 17:51:33 joel Exp $

#

#  COPYRIGHT (c) 1989-1999.

#  On-Line Applications Research Corporation (OAR).

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#  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.

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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.