FDDI, was: Re: [rescue] u2 drive trays

Dave McGuire mcguire at neurotica.com
Wed Aug 20 16:57:28 CDT 2003

On Wednesday, August 20, 2003, at 02:38 PM, Jochen Kunz wrote:
>> If they really had to discontinue
>> one and keep the other, they should have kept Unibus!
> But QBus is much easier to use. ;-(
> My Unibus experience is a PDP-11/34A that I killed by reversing the
> order of the cards. I documented everything very carefull before
> cleaning. But when I reassembled it later, I turned the backplane 
> upside
> down. So I filled it with cards begining at slot 9 instead of slot 1.
> Power on, lots of magic blue smoke. :-((( The console interface is dead
> and the CPU damaged. Fortunately I was able to replace this parts.

   That's not Unibus' fault, though.

   I don't mean that as snotty as it sounds...As you probably found out 
the hard way that day, the PDP11/34 CPU backplane isn't straight 
Unibus.  Slots 1 and 2 are specially wired for the two CPU 
boards...they're *very* far from being Unibus.


Dave McGuire                 "You don't have Vaseline in Canada?"
St. Petersburg, FL                     -Bill Bradford

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