func: static uint64_t cmd646_cmd_read(void *opaque, target_phys_addr_t addr,
  
                                  unsigned size)
  
  {
  
      CMD646BAR *cmd646bar = opaque;
  
  
  
      if (addr != 2 || size != 1) {
  
          return ((uint64_t)1 << (size * 8)) - 1;
  
      }
  
      return ide_status_read(cmd646bar->bus, addr + 2);
  
  }
  