struct  bindreq {                   /* request BIND         */
    char hdr[3];                    /* header               */
    struct { unsigned area:1;       /* area name defined    */
         unsigned node:1;           /* node name defined    */
         unsigned fmt2:1;           /* format 2             */
         unsigned fmt1:1;           /* format 1             */
         unsigned rsv1:1;           /* reserved             */
         unsigned dlu:2;            /* DLU is PLU/SLU       */
         unsigned init:1;           /* initiate only/init enq */
	    } fmt;                  /* request format       */
     char scrno;                    /* screen number        */
		 };