I am not talking about 24/7 availability, however. The
11/750 has a lot
of custom gate arrays in it. They may be pretty reliable, but if one
fails, the you have to either buy one from DEC (assuming they still have
them in stock) or raid one from another 11/750. The PDP12 is all TTL +
discretes. It would probably take longer to find the bad component, but I
am darn sure I could find or make a replacement any time in the future.
What about the scads of VAX-11/750 cardsets floating about from all of the
deceased VAXen?
William Donzelli
william(a)ans.net