ncr_delta
static int ncr_delta (int * from, int * to);
st = ncr_delta (&PROFILE.start,&PROFILE.status);
da = ncr_delta (&PROFILE.start,&PROFILE.data);
co = ncr_delta (&PROFILE.start,&PROFILE.command);
en = ncr_delta (&PROFILE.start,&PROFILE.end),
di = ncr_delta (&PROFILE.start,&PROFILE.disconnect),
se = ncr_delta (&PROFILE.start,&PROFILE.select);