Re: Problem with a VAXstation 3100 m76

[Michael Kraemer]

eugene schrieb:
> Hello, I know I've been posting a lot of questions, but this one
> really has me stumped so any help would be greatly appreciated. I
> have a VAXstation 3100 m76 and two 4MB SIMMs. If I install 1 x 4MB
> SIMM the system boots to the console prompt without error. If I
> install 2 x 4MB SIMMs, it will no longer boot to the console prompt.
> In fact, here's what happens:
>
> KA43-A V1.2
>
> F...E...D...C...B...A_..9...8
> ?24 UNXINT 20042E5F 04150000 054
>
> I have the two SIMMs in the 1 and 2 positions. I've tried swapping
> the SIMMs to no effect. I've tried each SIMM individually and they do
> both seem to work. But both together to give 8MB seems to die as
> shown above. I really hope that this isn't a problem with the
> machine. This is a really neat little machine...
>
> Any ideas?
>
> Thanks so much in advance...

I don't recall what positions 1 and 2 actually are,
but the RAM slots must be populated "columnwise",
as on the pixxs at
http://www.gsi.de/~kraemer/COLLECTION/DEC/vs3176.html

[Bob Eager]

On Fri, 20 Nov 2009 00:27:24 -0800, eugene wrote:

> Hello, I know I've been posting a lot of questions, but this one really
> has me stumped so any help would be greatly appreciated. I have a
> VAXstation 3100 m76 and two 4MB SIMMs. If I install 1 x 4MB SIMM the
> system boots to the console prompt without error. If I install 2 x 4MB
> SIMMs, it will no longer boot to the console prompt. In fact, here's
> what happens:
>
> KA43-A V1.2
>
> F...E...D...C...B...A_..9...8
> ?24 UNXINT 20042E5F 04150000 054
>
> I have the two SIMMs in the 1 and 2 positions. I've tried swapping the
> SIMMs to no effect. I've tried each SIMM individually and they do both
> seem to work. But both together to give 8MB seems to die as shown
> above. I really hope that this isn't a problem with the machine. This
> is a really neat little machine...

The URL just posted also has a note that if VS4000 SIMMs are used, only
4MB will work...wonder if that's what you have?

--
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[eugene]

You know what? That is kind of the problem. They were 16MB SIMMs
that I thought were 4MB SIMMs. Somehow I had it in my mind that they
were 4MB SIMMs. So that possibly explains it. I'm going to get some
4MB SIMMs here soon from someone else on the group who has offered.
So, I'll know when I get them and can try them...

Thanks!