I'd say any VAX with a UNIBUS, SDI, BI or XMI bus, at least, should qualify. I think
that would include all the
7xx, 6xxx, 8xxx, and 7xxx/10000 machines. I don't really know what was in a 9000...
9000 is also XMI. Several of them, if I remember right. SDI on the other
hand is just a disk interface. I don't think it makes sense to include