Multi-CPU Qbus VAXen

From: emanuel stiebler <emu_at_ecubics.com>
Date: Fri Oct 10 13:28:55 2003

Alex White wrote:

>>Check the note again. AFAIRC, this (ka630, ka650, ...) had just a
>>"mailbox" register to communicate, and only one cpu had access to the
>>qbus. The other ones had the qbus interface shut down. So, if you didn't
>>have you special backplane with 4 qbuses, it was pretty limited ...
>
> I've been planning a monster like this, 4 small backplanes mounted in a
> hacked-around wide cabinet, 4 processors running as a VAXcluster over
> Ethernet...

Why bother doing you own backplanes, if you use ethernet anyway ?
If you're thinking about you own box (doing your own backplane), try to
use four ka655 with 64 mbyte memory each and 4 mbyte shared memory on
the qbus.
But again, probably no software :(
Received on Fri Oct 10 2003 - 13:28:55 BST