1  unsigned short code = 0x0000;
       2  unsigned short  low = 0x4000;
       3  unsigned short high = 0xb000;
       4  
       5  int main (void)
       6  {
       7    if (
       8           (high & 0x8000) != (low & 0x8000)
       9        && ( low & 0x4000) == 0x4000
      10        && (high & 0x4000) == 0
      11        )
      12      {
      13        code ^= 0x4000;
      14        low  |= 0x4000;
      15      }
      16    
      17    exit (0);
      18  }