character   block    description
---------   -----    -----------
    0         -      /dev/console
    1         -      HP98628, HP98626, and HP98642
    2         -      /dev/tty
    3         -      /dev/mem, /dev/kmem, and /dev/null
    4         0      CS80 disc
    5         -      HP7970 nine-track magnetic tape
    6         1      HP9826/HP9836 internal flex disc
    7         -      HP-UX printer
    8         -      /dev/swap
    9         -      HP7974/HP7978 nine-track magnetic tape
   11         2      AMIGO disc
   13         -      SRM option
   16         -      Master pty
   17         -      Slave pty
   18         -      IEEE 802 device
   19         -      ETHERNET device
   21         -      HPIB DIL
   22         -      GPIO DIL
   23         -      raw 8042 HIL
   24         -      HIL
   25         -      HIL cooked keyboards
   26         -      ciper printer
