VAX 11/750 rescued, alas...
oldcpu2 at rogerwilco.org
Mon Oct 8 17:59:13 CDT 2007
Rod Smallwood wrote:
> Fear not all is not lost. There's tons of modules around but not that
> many cabs.
Yes, you are absolutely correct! The more I think about it, the more
glad I am to have even this empty chassis. Definitely harder to come by
than the modules that are missing.
A few good souls have already stepped forward offering some help with
the boards, so this revival might be less difficult than I anticipated
> In the picture of the Qbus board it appears to be sitting on the module
> config diagram.
> As it is pre printed and not filled in by hand its probably a standard
> That will give you a list of the boards.
Yup, I went through that last night. There is another label that was
inside one of the front cover plates that does show a list of modules
penciled in. So I believe I now know what the original configuration of
this system was.
I've come up with a minimum list of boards, and a wish-list of the
boards that were originally included. Looks like the the mass storage
was hung off of a UDA50, and some tape devices on the SI 9700 board
(which I still am completely ignorant of).
I have a couple of Fuji SuperEagles and an RA81, so I'll be on the
lookout for SDI and SMD interfaces for the rebuild. I just hope the
Fujis and RA81 are functional when the time comes!
> Note of caution do not try to turn it on. The power supplies will need
> some work. You need to reform/replace any electrolytics.
Roger that! I'm a firm believer in a full chassis cleanup, capacitor
reform, and separate PS checkout before every hitting the big switch on
the front! ;-)
Oh, yeah, that reminds me...I've got to locate the 'vending machine'
power-switch key for this thing. Anyone know if it is a fairly standard
> The case will clean up well and you can start off by getting the PSU's
> working and getting the list of modules together. Disk drives would have
> been in another rack I think.
This looks like it'll be a more lengthy revival than any that I've done
up until now, which have been mostly qbus PDPs and uVAXen. A great
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