#define  FSIZEWP 7
#define  SBA	 '\x11'
#define  SF	 '\x1D'

 static struct area {
   struct param {
      unsigned rsrv1	  : 2 ;
      unsigned protected  : 1 ;
      unsigned digit	  : 1 ;
      unsigned displayed  : 2 ;
      unsigned blik	  : 1 ;
      unsigned modified   : 1 ;
	       } flag;
   short  row;
   short  column;
   short  length;
   char   *data_out;
   char   data_in[80];
    };