some RM03 questions

From: Ethan Dicks <dickset_at_amanda.spole.gov>
Date: Sat Dec 20 19:09:57 2003

On Sat, Dec 20, 2003 at 06:34:56PM +0000, Tony Duell wrote:
> >
> > Hi All,
> >
> > I finally got to the RM03 I collected over a year ago from Italy.
>
> Disclaimer : I've enver seen a real RM03, but I believe it's close to
> some CDC drives.

I've been up to my elbows in real RM03s and CDC 9762s (what they are
based on). They are indeed close, but in my experience, not identical.

I worked a job in 1988 where the boss had me refurbing pallets of DEC
equipment. One task was to attempt to remove the DEC mods from the RM03
to allow us to connect it to a Unibus SMD controller. Even with his
expertise, we were not able to figure out all the things that DEC changed.
Perhaps with proper schematics it would have been trivial, but all we had
at the time was a real 9762 we could pull parts from, and a row of RM03s
to experiment with. ISTR there were some minor differences in the cards
in the internal card cage (not the SMD<->MASSBUS adapter below; that was
100% DEC).

I'm still sure it's possible, but I couldn't begin to describe how to
do it.

-ethan

-- 
Ethan Dicks, A-130-S      Current South Pole Weather at 21-Dec-2003 01:00 Z
South Pole Station
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Ethan.Dicks_at_amanda.spole.gov     http://penguincentral.com/penguincentral.html
Received on Sat Dec 20 2003 - 19:09:57 GMT

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