2) I use these
systems to host vintage graphics displays. I
have an E&S PS390 arriving this week, and I need a host
for it. I don't intend to leave it in a corner as part
of a "collection", I intend to have it up and running.
Hmmm... IIRC the PS390 is a pretty powerful machine in its own right --
there's a 680x0 (68020?) in there and a lot of bit-slice and ASICs. It
also has its own local mass storage (although this might be only floppy
drives). I wonder if it can run 'standalone'? It appears to be a very
impressive display system...
The PS300 series was an interesting piece of hardware. The last
gasp for vector displays. It stored its display list locally,
and all the graphics processing was done locally. There is
the possibility to run applications locally, but most were
connected to host computers. This was the way they were intended
to operate.
I've never heard of one being hosted on a PDP11, but I don't see why it
would be impossible. There were systems disks for DECnet or TCP/IP comms
I think, using Ethernet or (presumably) an RS232 port (ethernet was an
option I believe).