/* k 0021	12/07/90 	*/
/* k 0046	08/09/90	*/
/* k 0081	23/11/90	*/
/* k 0119       08/02/91        */
struct segprf  {
  union  {			/* un */			/* @0046 */
   struct nau *nau;
   char th[4];					/* @0046 */
								/* @0021 */
	 } un;					/* @0046 */
   char flag;			/* flag */
#define RSP_DELAYED   0x80	/* delay flag for rsp */	/* @0081 */
/*   unsigned class: 4;		* segment class *		* @0046 *
   unsigned scrno: 4;           * logical screen number (for vt) */
   unsigned char classscrn;     /* @0119 */
								/* @0046 */
   short len;			/* segment length */
   struct segprf *link;		/* next segment pointer */
								/* @0021 */
   struct rqb srqb;           /* segment rqb         */
	       };