- ttyinput, nodev, nulldev, ttstart, ttymodem,
-#if NBK > 0
- bkopen, bkclose, bkread, ttwrite, bkioctl,
- bkinput, nodev, nulldev, ttstart, nullmodem,
-#else
+ ttyinput, nodev, nulldev, ttstart, ttymodem, /* 0- termios */
+
+ nodev, nodev, nodev, nodev, nodev, /* 1- defunct */