>I consulted with a system note 'ULTRIX and UWS; AA-PYKCB-TE,' and learned
>several things.
>
>- 5100 backplane does not mention to how ports are numbered. The doco
>  has a clear figure.
>- ULTRIX had the following rule for 5100;
>			chip#	line#
>	/dev/console	0	0
>	/dev/tty00	0	1
>	/dev/tty01	0	2  DB25 w/ modem control
>	/dev/tty02	0	3 
>
>	/dev/tty03	1	0
>	/dev/tty04	1	1
>	/dev/tty05	1	2  DB25 w/ modem control
>	/dev/tty06	1	3
>
>	/dev/tty07	2	0
>	/dev/tty07	2	1
>	/dev/tty07	2	2
>	/dev/tty07	2	3
>
>To keep the rule or not would be another story.

in netbsd, /dev/consolke is an alias for sme real device.  since we
already support(ed) ttyD{0,1,2,3} on headless 3100s and headless
5k/200s, the obvious thing is to number dc0 lines as ttyD0 through
ttyD3.

ttyD4-ttyD7 and ttyD8-ttyDb sound fine for the option slots.
if someone wanted to update the dc manpage, that'd be great.
Does that conficlt with how port-vax handles DZV/DZQ (or whatever
they are called?)

Does the web page say we support 5100s?  How is Simon's Freddo doing?
(A picture would be wonderful!)