Zane H. Healy wrote:
At 1:27 AM
-0500 11/10/06, Curtis H. Wilbar Jr. wrote:
but I wouldn't be surprised if a few PDP11s
are
still doing some oddball stuff out there).
They're still around in various settings, industrial, scientific,
business, etc. They're used for such things as electron microscopes,
spectrum analyzers, controlling parts of nuclear plants, etc.,
PDP-11's are still big business. In some cases it's because they're
still working, why spend the money to replace, in others it would
simply cost more to replace than it does to keep them running
(typically places where qualifying new HW/SW can cost insane amounts
of money).
Jerome Fine replies:
I don't have any estimates as to how much "insane" might be,
but as a wild guess, from 10 to 1000 times the actual
cost of the associated software and hardware for the
actual system. So if a typical PDP-11/73 system might have
cost $ 20,000.00 new (back in 1985), then the complete
application, including associated software and hardware
interfaces might be from $ 200,000.00 to $ 20,000,000.00
for just one subsystem. At Ontario Hydro, a typical
3,000 Megawatt station might have cost $ 10,000,000,000.00
to build, so the PDP-11/73 system would be only a small,
but critical sub-system.
Jay - did you get my reply. Why did you want to contact me?
Sincerely yours,
Jerome Fine
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