I'm currently thinking about creating a new "virtual bus", like the
vsbus, but for MicroVAXen. As the vsbus actually is a resource holder,
the new bus (mvbus) isn't. I'll use it just to get a better hierarchy
for things like SGEC and SHAC that is available on some MicroVAX systems.

It will look like this:
mvbus0	at mainbus0
sgec0	at mvbus0
shac0	at mvbus0
uba0	at mvbus0

for example. Comments about this?

-- Ragge