
  TYPE
    iot$request_recovery = (ioc$attempt_recovery, ioc$terminate_at_error,
      ioc$rec_reserved, ioc$continue_at_error),
    iot$interrupt = packed record
      value: boolean,
      port_number: iot$port_number,
    recend,
    iot$priority = 0 .. 0ff(16),
    iot$port_number = 0 .. 1f(16);
