Today I started stripping out good parts from a Convex C240
minisupercomputer - a machine I had purchased from a scrap dealer
almost ten years ago. It was a disaster of a deal - one of the rare
times I feel I was screwed my a junkman. The machine turned out to be
missing many parts, including processors and power units, cables were
chopped, memory was swiped, plus there was mouse crap evident - yuck.
For years I have been threatening the part it out, and now is the
A few parts will end up on Ebay, the metal will go to the scrapyard,
and I am keeping the boards that I have for now. I know Convex
machines are not very common, but if there are others that need spares
for 200 series machines*, please let me know, as the boards and
(hopefully) backplane will be for sale.
* A guy I know that worked at Convex said the processors should mostly
interchange - although a rev level problem might pop up.
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I have a Cromemco system that came with a IMI model 7700 Hard Drive. The
drive was working when I got it but was having read errors. I begun
backup up the files and planned on reformatting. I was able to back up
the files I need but head a thump like something hit the drive of the
drive. This is a 10" 5 meg drive with a plastic clear top. The drive
then began to fail so I power it off and looked around as much as I
could through the top. I power it back up and now the drive will begun
ready. The heads look like they never go through the headload process
but I can't be sure. If I move the unit I can see that the head actuator
lets the heads float freely in and out.. I have measured all the power
supply voltages going to the drive and they are good. I don't think it
was a head crash as I don't see signs on the platters as much as I can
see through the plastic. The top does look like it can be remove but I
don't have a clean room I'm holding off until that is the last resort. I
worked on CDC drives so this looks like one only smaller and without the
little brush that would sweep the drives before the heads loaded. I
don't have a manual so I'm limited to what I can do. I have a few
questions if anyone can help with. The head lock does disengage when
power is applied.
Does the drive need to come up to speed before voltage is applied to the
Does anyone know where I can find more out on this drive
Should I get ready to make two wall clocks out of the platters?