[Simh] Unichannel

[Bob Supnik]

As preparation for an eventual implementation, I'm writing a paper on 
the workings of the UC15, as determined from the schematics. I've 
answered the technical questions, but I'm left with a business question: 
was it a commercial success? The online census of 18b systems dates from 
'72, before the UC15 was shipped, so it's no help. Of the surviving 
PDP15 systems, Mike Ross's pair are XVM Unichannel systems; it's 
impossible to tell what the Computer History Museum has; I don't know 
what other 15s are in private hands, so there's inadequate data to draw 
a conclusion.

Anyone have information on this aspect of the Unichannel?

/Bob