Aternative box suggestion would be an old BA11 box, ( from a pdp-11/23+),
which has the Q22/CD arrangement, or the VAX3600 box.
    On the subject of multi-cpu's can the KA650 be used in a similiar
manor as the KA630 in a multi processor configuation ?

Dave.


der Mouse wrote:

> >> That means two boxes with q22 interconnect cables would be required
> >> to produce a slave that has more than the 1meg onboard.  [...]
>
> > It also means that even if you do want to try installing the second
> > CPU with its on-board memory, you can't... since it can only be
> > plugged into the PMI (CD) slots, which are already being used for
> > communication with the primary CPU...
>
> This gets into stuff I have personal experience with.
>
> I have worked with a MicroVAX-II system with two CPUs in a single
> backplane.  It was the backplane with three C/D slots; I can never
> remember the nomenclature.  We had a KA630 in slot 1, a memory board in
> slot 2, and another KA (I think it was a 630 at one point and a 620 at
> another) in slot 3.  The slave processor had only its onboard 1M of
> memory, of course, but it didn't break anything to have it plugged into
> the same C/D interconnect as the master CPU and the memory board.
>
> No backplane hacks were required; it was a stock bus.



--
Dave Clarke            dave.clarke@swindon.ericsson.se
Ericsson                Tel.No. +44 1793 494513
Swindon Design Centre   Fax.No. +44 1793 490151

Wanted any and all types of PDP and microVAX hardware,
software,manuals,schematics,etc. for hobby use.