[Simh] VAX DZ terminal controller unit?

[Jason Stevens]

I'd try the 'modem' setup for the DZ ... I recall something similar
with Unix/32v

set dz lines=16
att dz -m 2311

Is what seemed to work for that (I am going from memory)..

On Thu, May 19, 2011 at 12:59 PM, Gary Lee Phillips
<tivo.overo at gmail.com> wrote:
> I'm running SIMH 3.8 on Ubuntu 10.04 with OpenVMS 7.3 from the OpenVMS
> Hobbyist CD.
>
> The emulation seems to be working well for almost everything I've
> tried, except that using the DZ device causes some odd behavior.
>
> In my vax.ini file I have:
>
> SET DZ LINES=8
> ATTACH DZ 8501
>
> When the VAX emulation is booted, it is possible to "telnet localhost
> 8501" (or use a telnet client from another machine to port 8501 on the
> emulation host) and get a login prompt. This works as expected for one
> session. However, after logging out it is no longer possible to
> connect again. When I try, I get as far as
>
> Connected to the VAX simulator DZ device, line 0
>
> But pressing ENTER or CTRL-P or any other key never brings up a login
> prompt. Sometimes after a few minutes it will work again, but not
> always. If I leave the "dead" session connected and try to start
> another instance of the telnet client, that connects to "line 1" and
> works, but once it is logged out, line 1 is no longer usable. And so
> forth...
>
> Something is not being reinitialized. I've tried "logout/hangup" and
> "logout/nohangup" and using the telnet client to send break signals
> and other out-of-band communications, but nothing seems to revive the
> line.
>
> I may well be missing something here. Any advice?
>
> Note that with TCP/IP installed and working on the OpenVMS system, a
> standard telnet connection to the emulator still works correctly, but
> this doesn't allow a terminal connection from the emulator host
> machine itself. It only works from another machine since both IP
> addresses are hosted on a single NIC in the emulator host.
>
> Thanks for any help you might offer.
>
> Gary
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