24 Nov
2015
24 Nov
'15
6:05 p.m.
On 11/24/2015 05:52 PM, Mark Wickens wrote:
I haven't looked into this at all and I suspect
it's probably quite tricky
indeed. I did look around a while back drew a blank.
I built up a Micro-VAX II system out of boards, backplanes
and assorted junk. I made my own power supply. The power
supply is actually easy, just +5 and +12, with a touch of
-12 for serial I/O.
The only tricky thing is the power-OK and reset logic, which
really wasn't all that tricky, either.
I had a power and thermal safety control panel on it
repurposed from the original 3rd party IBM mainframe memory
box that would shut it down if there was an abnormal voltage
or cooling failure.
Jon