/*  k 1002    24.07.90   */
union parm_trn {
  struct {
  struct {
  char adapter;           /* adapter number        */
  char mode_address[6];   /* station address in ring */
  short num_rcv_buffers;  /* number received buffers */
  short rcv_buffer_len;   /* received buffer length  */
  short data_hold_buf;    /* number sending  buffers */
  struct product_id_addr *pia; /* ptr to id        */
  short dir_buf_size;     /* buffers size in direct pool */
  short dir_pool_blocks;  /* number 16b-blocks in dir pool */
  struct dir_pool *dirp;  /* ptr to direct pool    */
  char dlc_max_sta;       /* max number station dlc */
  short *received_data;   /* ptr to exit-routine   */
  }dir;
  struct {
  char maxout;            /* send window size        */
  char maxin;             /* receive window size     */
  short dlc_buf_size;     /* buffer size             */
  short dlc_pool_len;     /* number 16b-blocks       */
  struct dlc_pool *dlcp;  /* ptr to  pool            */
  }dlc;
  }parm_open;
  struct {
  short station_id[255];  /* station id array      */
  short *close_data;      /* ptr to exit-routine   */
  }parm_close;
  struct {
  char command;           /* command code          */
  short station_id;       /* station id            */
  short buffer_len_one;   /* buffer1 size          */
  short buffer_len_two;   /* buffer2 size          */
  short buffer_one_*pbo;  /* ptr to buffer1        */
  short buffer_two_*pbt;  /* ptr to buffer2        */
  short *write_data;      /* ptr to exit-routine   */
  }parm_write;
  struct {
  short station_id;       /* station id            */ 
  char option;            /* receive option        */
  short *read_data;       /* ptr to exit-routine   */
  }parm_read;
  struct {
  short sap_station_id;   /* MAC station id        */
  char maxout;            /* send window size      */
  char maxin;             /* receive window size   */
  char rsap_value;        /* MAC remote address    */
  char access_priority;   /* priority ring access  */
  short *dest_addr;       /* ptr to receive remote station */
  short *ioctl_addr;      /* ptr to exit-routine   */
  short station_id;       /* station id            */
  char option;            /* option                */ 
  short *read_data;       /* ptr to exit-routine   */
  }parm_open_station;
  struct {
  short station_id;       /* station id            */
  short route *route;     /* ptr to route-table    */
  }parm_connect;
  struct {
  short station_id;       /* station id            */
  }parm_close_station;
  struct {
  short station_id;       /* station id            */
  char buffer_get;        /* number required buffers */
  }parm_get;
  struct {
  short station_id;       /* station id            */
  struct buffer_one *pbo;  /* ptr to first free buffer */
  }parm_free;
 } parm_trn[5]