What is this computer (picture)
axelsson at acc.umu.se
Wed May 20 03:12:51 CDT 2009
John Foust wrote:
> At 09:14 AM 5/19/2009, Pontus Pihlgren wrote:
>> Not sure if it has a bell, but a quick google tells me it is a Princeton
>> Gamma Tech System 4:
> I've got one of those attached to my SEM.
> - John
For those not at home in the electron microscope business, it is the
measurement computer for an EDS system, Energy Dispersive Spectroscopy,
that measures the energy in single x-rays emitted from a test sample in
a Scanning Electron Microscope or a Transmision Electron Microscope.
With it and the detector system you could see which elements that makes
up a sample.
I've got a PGT 1000 with an Alpha LSI in the base. The same form factor
but the computer takes up the full base. My system is equipped with a 16
kword 16 bit core memory.
It started when I turned the power on for the first time showing the
graph from the last measurement, I just love core memory. Sadly the
computer crashed when I pressed "CLEAR". I suspect that I have an EPROM
problem but haven't had time to do anything more with it.
There are manuals on bitsavers at
and a collector in Sweden http://www.sdu.se/computer-automation-museum/
Anyone got a spare front panel for Alpha LSI or schematics of it?
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