31 Oct
2003
31 Oct
'03
5:56 a.m.
On Oct 31, 14:23, Patrick Finnegan wrote:
just
> Looks like it. If you've tried two
terminators and two
controllers,
> all that's left is the cable or the drive. I
assume you've got the
> ribbon cable from the controller to the bulkhead connector round
the
right way.
Hmm, right that's one thing I'm not too sure about... the cable is straight-thru, right? I'm using a makeshift cable
(one of a couple
that I've
tried), and it's straight-thru, because I was
assuming the 'real'
cable is as
well. Sometime today I'll try to look to see if
there's anything too
obvious
that's wrong (eg missing 4MHz clock signal).
Yes, it is straight-through. One of mine has 8" of old 40-pin ribbon
cable from an Acorn 2nd Processor, vintage 1985 or so, and it works
fine. The back of the bulkhead connector is just a dual row of pins on
0.1" centres, and an ordinary female header fits perfectly. Of course,
depending on which way up you have the bulkhead connector, you might
need a half-twist in the ribbon cable.
--
Pete Peter Turnbull
Network Manager
University of York
5 Nov
5 Nov
12:52 p.m.
New subject: Wanted: RL02K (Re: WTB/T: RL02/01, QBUS SMD)
Pete Turnbull declared on Friday 31 October 2003 02:56 pm:
Yes, it is straight-through. One of mine has 8"
of old 40-pin ribbon
cable from an Acorn 2nd Processor, vintage 1985 or so, and it works
fine. The back of the bulkhead connector is just a dual row of pins on
0.1" centres, and an ordinary female header fits perfectly. Of course,
depending on which way up you have the bulkhead connector, you might
need a half-twist in the ribbon cable.
Well, I feel like a moron. Flipping one end of the cable fixed it, and
made the FAULT light go out. After a few hours of messing around with
things, I now have NetBSD booting on a VAXstation 3200 with an RLV12 in
it. I was just able to read and write the entire disk.... and the last
sector was all 0's before writing the disk (no bad sectors!) Not too bad
on a -DC cart. Now, to test out my -EF cart, the only other one I have.
I *hope* that one has no problems : )
But first, I have to attempt to write a bootable disk image for a
PDP-11/23...
All I can say right now is "WAHOO!" I'm glad I spent the 3 minutes to try
playing with the cable. Of course, that doesn't mean that I don't still
want drives or more carts. : ) Does anyone have any RL02 carts to spare?
Pat
--
Purdue University ITAP/RCS
Information Technology at Purdue
Research Computing and Storage
http://www.itap.purdue.edu/rcs/
7718
days inactive
7723
days old
1 comments
2 participants
participants (2)
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pat＠purdueriots.com -
pete＠dunnington.u-net.com