The PDT-11/150 was reportedly available with one or two
RX01
drives, and three serial ports with another three optional. I've
only seen the one I own, which has both drives and six ports.
There're no other expansion options that I can recall.
I've never seen one with only one drive, but I have seen some
which didn't have the extra 3-line option.
In fact it's sitting in the dining room with a
VT100 waiting to
be powered up to check some 8" floppies I received a while back.
I'm in the process of bringing up a VAX 4000/500 I recently
received and it'd be a hoot to connect the PDT to it.
Remember, after powering it on, you type two '@' to autobaud and
boot the unit.
Did RT-11 ever include DECnet support? Probably so, but
as of
what version? I don't recall seeing mention of it with whatever
version came with the PDT, and I'd be amazed if the PDT could
support it...
RT never came with DECnet support... DECnet was, however, available
for it as a 'layered product'. The DECnet available for RT was
Phase III, asynch/sync support only. No Phase IV/Ethernet. I know
of someone who actually had a PDT running RT on the DEC internal
network at one point...
Megan