From Ache:

From Ache:
	Better kernel printout for multiport cards

From Bde:
	o Get decls of tk_nin, etc. from "dkstat.h" (a stupid place).
	o Mallocate sio structs as well as tty structs.
	o FAKE_DCD() is now handled by setting CLOCAL in the initial
	  and lock states.
	o Removed ifdefs for COM_BIDIR.  It is now standard.  Callin
	  devices now act identically (except for bug fixes) to the
	  old standard devices if the callout devices are not used.
	o New magic minors for initial and lock devices.  Better macros
	  to handle magic minors.  "ls -l /dev" should show something
	  like this:
crw-------   1 uucp    	wheel   	 28,  0 May 26 01:18 /dev/ttyd0
crw-------   1 uucp    	wheel   	 28,  1 May 21 11:25 /dev/ttyd1
crw-r--r--   1 root    	wheel   	 28, 32 May 15 19:36 /dev/ttyid0
crw-r--r--   1 root    	wheel   	 28, 33 May 15 19:36 /dev/ttyid1
crw-r--r--   1 root    	wheel   	 28, 64 May 15 19:36 /dev/ttyld0
crw-r--r--   1 root    	wheel   	 28, 65 May 15 19:36 /dev/ttyld1
crw-------   1 uucp    	wheel   	 28,128 May 26 14:48 /dev/cua00
crw-------   1 uucp    	wheel   	 28,129 May 26 18:57 /dev/cua01
crw-r--r--   1 root    	wheel   	 28,160 May 15 18:58 /dev/cuai00
crw-r--r--   1 root    	wheel   	 28,161 May 15 19:35 /dev/cuai01
crw-r--r--   1 root    	wheel   	 28,192 May 15 18:56 /dev/cual00
crw-r--r--   1 root    	wheel   	 28,193 May 15 19:35 /dev/cual01
	  The initial and lock devices are controlled using commands like
	  this:
stty </dev/ttyid0 57600        crtscts
stty </dev/ttyld0 57600 clocal crtscts
stty </dev/cuai00 57600        crtscts
stty </dev/cual00 57600        crtscts
	  Here the port speed is changed from the default of 9600
	  to 57600 and locked (any nonzero speed works as a lock).
	  clocal defaults to off and is locked off for the callin
	  device to avoid certain security holes.  crtscts is changed
	  from the default of off to on and locked on (flag bits are
	  locked by setting the same bits in the lock port).  It is
	  only necessary to set the initial state for buggy programs
	  that don't set it for themself.  It is dangerous to set
	  lock bits if the device cannot support them (e.g., locking
	  crtscts on for a mouse port will probably hang the X server).
	  However, it may be necessary to set lock bits for buggy
	  programs that clear nonstandard bits.
	o Removed FIFO_TRIGGER.  The fifo trigger level is now set
	  automatically.  It is always set to 1 for slow mouses.  It
	  is set to 14 for the very first open but drops back to 8
	  for first opens and to as low as 1 if overruns occur.  I
	  haven't been able to load my system enough to get it to
	  drop below 8.  Changes to the levels are logged.  Please
	  report if the level ever drops below 8.
	o The fifo disable flag still works to disable the fifo
	  completely.  Please don't use it.
	o Removed ifdefs for 1.1R interrupt handling.
	o Removed ifdefs for non-mallocation of tty structs.
	o Use timeout instead of sleep to hold down DTR for long
	  enough.  Fixed races.  Now opens have to sleep while
	  DTR is being held down.
	o Urgent input character now depends on the line discipline.
	  Previously it only worked for SLIP.  Now it might work
	  for PPP to reduce latency by half a tick.
	o Attempted to fix initialization of interrupts for 4ports
	  (flag bit 0x1 means 4port-compatible, not multiport).  The
	  master interrupt control register and ~OUT2 (badly aka
	  MCR_IENABLE) have to be initialized before probing for
	  interrupts.
	o Rewrote sioopen() to simplify it and avoid races.  Too
	  many changes to list.  Essentially, an open either succeeds
	  immediately or sleeps until it can succeed immediately.
	  After every sleep, all the conditions required for success
	  are checked again by restarting the open from near the top.
	o Callout ports are implemented using trapdoor carrier again.
	  You can program their initial state to set CLOCAL if you
	  want.
	o Use new sleep address macros.  Better names for sleep addresses.
	o Removed bidir ioctls.  There are enough important races to
	  worry about.
	o Special treatment for ioctls to new initial and lock state
	  devices.  These devices only support ioctls, not read, write
	  or select.  Separate devices work better than would selector
	  bits like CIGNORE because ordinary stty(1) works on them, and
	  it is impossible to open a callin/callout device while the
	  device going in the other direction is active.
	o The DTR wait time as seen by ioctls it is now always in
	  hundredths of a second (independent of hz).
	o Removed TB_*() macros.  There is no point to only using them
	  in sio.
	o Use ttwwakeup() to handle write-wakeups consistently.