In message <Pine.NEB.4.33.0209231018240.21503-100000@vespasia.home-net.internet
connect.net>Bill Studenmund writes
>On Mon, 23 Sep 2002, Andrew Doran wrote:
[...]

>> Because that would allow the 0th channel to stomp on the other channel's
>> control lines, and give applications the misleading impression that they can
>> change DTR/RTS. There again, given that those ports aren't ever likely to be
>> used as ttys, it's not necessary.
>
>Right; they are wired up for keyboard and mouse only.
>
>Note that if they ever get ttys, you can use the cs_wr5_dtr and cs_wr5_rts
>fields to indicate that those ttys DON'T have DTR & RTS pins. So all
>should be well.

Surely This change applies to IOASIC Decstations, too?  DEC sold a
dongle which allowed wiring up DECstation mouse/keyboard port as
terminal lines (without modem signals, obviously, and not at the same
time as a framebuffer console. At least not with input:))

Some netbsd/pmax users use/used that setup, and used to file PRs when