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                           OvrClearBuf procedure

  DECLARATION:  OvrClearBuf

      PURPOSE:  Clears the overlay buffer

         UNIT:  Overlay

      REMARKS:  Calling OvrClearBuf disposes all of the currently loaded
                overlays from the overlay buffer.  All subsequently called
                routines to reload the overlays from the overlay files or
                from EMS.  The overlay manager never requires you to call
                this routine.   It is intended for special use, such as
                temporarily reclaiming the memory used by the overlay buffer.
See Also: OvrGetBuf OvrSetBuf
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