> ...I'm still not clear why I can't MAKEDEV tty? 
Lucio Chiappetti supplied the following gem..
 
  Well, your "terminals" (windows, telnet etc.) are "pseudo-ttys", the
  ttypn and ttyqn things, aren't they ?
 
  "ttys" are REAL tty ports like tty00 and tty01, are you planning to
  add a new card with more serial ports ?
 
Which makes everything perfectly clear. 
(Perhaps this information is in the documentation but I gave up
searching after about 20 mins)
k.mcmanus_at_gre.ac.uk  -  
http://www.gre.ac.uk/~k.mcmanus
-------------------------------------------------------------
Dr Kevin McManus                     ||
School of Computing & Math Science   ||
The University of Greenwich          ||
Wellington St.  Woolwich             ||Tel +44 (0)181 331 8719 
London SE18 6PF  UK                  ||Fax +44 (0)181 331 8665
Received on Thu Jul 02 1998 - 15:29:25 NZST