[Simh] PDP-11 emulation and networking

[Zane H. Healy]

At 8:25 PM -0400 10/20/05, Gregg C Levine wrote:
>Hello from Gregg C Levine
>(I sent the original off earlier, but it never showed up here.)
>I have here a DEC (Terminal) Server model 90L+, (I put the word
>Terminal in these things because it was designed to serve sessions to
>terminals at one point in its career.)
>
>Basically I'd like to see if the current release of SIMH PDP-11 can
>talk to this device, while running an appropriate OS. Preferably one
>of the R families of operating systems that might have been in vogue
>about the time a PDP-11 might have been using a similar device. So far
>asking about the unit in the usual newsgroups has resulted in a lot of
>negative information, including that the LAT protocol might not have
>been available for the PDP-11 and the R families of operating systems,
>particularly the versions we have access to.

Interesting, I've used my 90L+ to talk to RSTS/E, RSX-11M, and 
RSX-11M+ on real PDP-11's without any problems.  I've also used it to 
talk to TOPS-10 running on KLH10.  I also use it to talk to OpenVMS 
running on both VAX and Alpha.

What I can't tell you is how well networking will work under SIMH. 
The last time I tried it was right after it was added, and I didn't 
really have any luck.  I gather it's matured quite a bit, but I 
haven't had time to play with it.

>However a fellow on another list, that I know confirms that this
>particular server has a bad habit of broadcasting its addresses in a
>form that's a bit strange, as compared to the other servers that he
>either owns, or has worked with in the past.

Interesting, I did have some fairly serious issues in getting it to 
talk to RSTS/E, but it turns out that most of the problem with 
getting DECnet/E running was a bad Ethernet Switch.

		Zane


-- 
--
| Zane H. Healy                    | UNIX Systems Administrator |
| healyzh at aracnet.com (primary)    | OpenVMS Enthusiast         |
|                                  | Classic Computer Collector |
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|     Empire of the Petal Throne and Traveller Role Playing,    |
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