New to VAX (4000/200)

[Glen Slick]

On Thu, May 1, 2008 at 7:55 AM, Jochen Kunz <jkunz at unixag-kl.fh-kl.de> wrote:
> But there are a few 4k2 in BA440 boxes. I suppose DEC switched from
> BA213 to BA440 style boxes at the end of the 4k2 live time.
>
> > The BA440 has those processor-memory interconnect slots to
> > the right of the Qbus, right?
> Yes. IIRC this special CPU slot also brings one of the two DSSI buses
> to the backplane.
>

That's actually a BA430 for the 4000-200 (seach for the
EK–436AB–IN–002 manual on the net), while the BA440 is used for
4000-300 and beyond.

You can put a KA660 in a BA213, but then you need to cable up the DSSI
bus, while the DSSI bus is routed directly to the CPU slot for the
KA660 in the BA430.