o  robot_info - This is the address of a robot_info_t structure
       initialized using mrd_startup(3mrd) or mrd_show(3mrd). This
       data structure contains the element starting address and
       counts for each type of element, which are needed to map an
       absolute element to the correct zero relative address and
       type.

    o  port  - The absolute integer element address of the port which
       is to be used as the destination of the move.

    o  dev_status - The dev_status is the address of a dev_status_
       t structure, which is used to pass back detailed error
       information in the event of a command failure.