On Fri, 2003-02-14 at 10:50, Michael Robinson wrote:
> > > Could someone scan the engineering drawings for an H217C stack?
> >
> > Go to http://www.spies.com/~aek/pdf/dec or
> > http://www.maincoon.com/classiccmp one or both will have drawings for
> > the 11/05.
>
> Hmm, we do have the drawings for the 11/05. However, neither of the above
> sites seem to have drawings of the H217C.
>
Look for MM11-U(P). The option (with backplane) is MF11-U(P). It'll
cover the G235, G114, H217 and the M8293. The other one I believe is
MM11-L which uses the smaller core.
> > > This is partly for my own edification (I have one such board in my
> > > machine), and partly because of the fact that this "new" pdp-11/05 has no
> > > core with it. Its engineering drawings seem to indicate that it wants
> > > 4 or 8kW of core (one or more of H213-H216), *not* the 16kW of a H217.
> > > (Granted, by placing two H214s into a chassis we get 16kW, but I
> > > digress.)
> >
> > It will depend upon which backplane you have. If it's an 11/05-S
> > backplane then it's the same as what I have and you can go to
> > http://www.shiresoft.com/pdp-11/11-10/index.html to see how to use an
> > H217C (which is what I have in mine).
>
> I'm fairly sure it's not an 11/05-S, though I could obviously be wrong. I
> don't have the machine in front of me right now. Looking at the machine
> you have, the form-factor is very different (that, of course is not
> conclusive). This machine looks like a lower-profile beast, the modules
> enter from the side of the chassis, which is a pain because you have to
> take the machine out of the rack to get at them.
You can't tell by how it's oriented. It's the backplane. If you look
there should be a tag indicating the type of backplane it is. You
should see 11/05-S. If you can't find that, atleast get the part #. We
can probably cross reference off that.
>
> > > If so, the next question is, can I do this with an H217? (Drop in an
> > > H217C, and tell the machine that it's really an H214/H215.) This might
> > > sound like a gratuitous waste of core, which it is, but I happen to have
> > > another core board (not in my machine) that could be used... So anyway,
> > > the engineering drawings would answer this question really fast.
> > >
> >
> > It's not so much the drawings but the wirelist for the backplane. You
> > really need to know which backplane you have.
>
> I have that. Again, my question is what does the H217 look like in
> comparison to the H213-H216 family? Pretty much the only piece of data I
> need to answer my question is the engineering drawings of the H217...
>
> Guy: BTW, the proud owner of this machine is Jesse Kempf, whom I believe
> you have talked with. He's not on classiccmp, though.
Yes. I talked to him yesterday. He's pretty stoked.
>
> Thanks,
> Michael Robinson
> RPI Electronics Club Vaxherd/PDP-11 Fixer
robinm_at_rpi.edu
--
TTFN - Guy
Received on Fri Feb 14 2003 - 13:08:00 GMT