struct naus0  {
   struct {
     unsigned char flag;
     struct save_7927 *sbuf;    /* save buffer ptr for logical screen */
           } ls[9];             /* maximum 9 logical screens */
     char id[4][9];
               };
#define SAVEB    0x80
#define NOSAVEB  0xff-0x80
#define LS_ACT   0x40
#define LS_SESS  0x20
#define LS_NOACT 0xff-0x40
#define LS_NOSESS 0xff-0x20 
#define VT_ACT   0x80