RTEMS Ada User's Guide
Each application utilizing the RTEMS I/O manager must specify the address of a Device Driver Table in its Configuration Table. This table contains each device driver's entry points. Each device driver may contain the following entry points:
If the device driver does not support a particular
entry point, then that entry in the Configuration Table should
be NULL. RTEMS will return
RTEMS.SUCCESSFUL as the executive's and
zero (0) as the device driver's return code for these device
driver entry points.
RTEMS Ada User's Guide
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