On August 3, Merle K. Peirce wrote:
> We just rescued a Cray J90 from the Washington, DC area. A Vicom came
> along with it.
I'm quite shocked that I didn't hear about this machine.
-Dave
--
Dave McGuire
Laurel, MD
> Sergio,
Hi again !
> I have a similar DSD board and drive, the drives are seen as 2 RX02's.
> You need the box with the drives as well, as it also contains some
> logic. I
> am not
> aware of any possebility that an original RX02 will work with the DSD
> interface or
> will RX33 ones do.
:-(
Is there anybody out there (mainly in Europe) that could send
or purchase me one of this DSD monsters ?
Thanks, Ed.
Sergio
> Sergio,
Hello !
> You can have up to 4 drives per controller, and up to 2
> controllers per
> system.
Ok. This is good.
> BTW, RD5x drives are usually seen as DU devices, not as DL ones.
Mmmm... This board treats one Mfm Hard Disk attached to it
like up to four DL drives, from DL0 to DL3. The drive must
be partitioned with one partition by drive emulated. That is
what can be deducted reading the (poor) info that could be
located in the Internet.
We speak about one RD52. I suppose it could be divided in three
DLx emulated drives.
Thanks for the answer, Ed.
Sergio
I have had a problem with some of my ESDI disk drives for a number of years
which may have a very simple solution.
When I use the drives in a BA123 box with an 11/73, the system functions correctly
while I am using 7 quad boards or less. Whenever I add the extra boards, the READ
operations on the Hitachi ESDI DK515-78 disk drives (Sigma RQD11-EC quad ESDI
controller) take about twice as long. The WRITE operations are still just as fast.
I have been looking at the problem again recently and while it has not yet been resolved,
I now begin to suspect that the cables between the RQD11-EC controller and the drives
may be too long. Just a guess is that the total length of the 34-pin cable is six feet (with
the first portion to the first header being four feet and three more pieces of eight inches
making a total of six feet to the last header) and the 20-pin cables (there are four with
three currently in use) are about four feet each. In addition, the three ESDI drives currently
in use run off their own PC power supply (in fact it is the actual power supply that came
with the drives within a large raid set-up to be used with a VAX). I also salvaged the fans
inside the box and each drive has its own fan. Normally, I only turn on one ESDI drive
when the other ESDI drives are not being used for backup purposes. In addition, I
have installed a heavy ground cable between the PC power supply and the BA123 box.
In case anyone asks, the last drive on the 34-pin cable is correctly terminated and
the other drives are not terminated.
Since everything runs VERY well in the BA123 with the DK515-78 drives while I
use seven or less quad boards, I have not tried to investigate much until recently since
the extra boards are used so rarely it has not been a problem 99% of the time.
And the fact that everything works so well has not led me to suspect the length of the
34-pin/20-pin cables. Does anyone have any suggested maximum cable lengths?
Sincerely yours,
Jerome Fine
On Aug 3, 14:28, Zane H. Healy wrote:
> Pete wrote:
> > Is Solaris 7 still available anywhere? My CDs seem to have gone
walkabout,
> > and it doesn't seem to be online anymore.
> I don't believe Solaris 7 was ever available online, there was the $20
> hobbyist kit, which is kind of lame.
Maybe it was 2.6 that was online, then? I don't remember; I did get what I
think you're referring to as the hobbyist kit, though it didn't cost me $20
(it was a slightly different deal in the UK).
I don't remember the details, but wasn't one version available for a short
while to academic users (University staff) in source form?
--
Pete Peter Turnbull
Network Manager
University of York
Last night I was browsing the UNIBUS/PDP-11 field guide on the
Web before I went to sleep. Then I dreamed of a VAX 11/785 with
an UNIBUS extension cabinet full of cards. Included was a 3, 4,
5, or so card-set that together comprises a video interface. Hook
up a composite monitor or RGB monitor and there you have it:
A VAX 11/785 as a workstation!
Write a driver for X11R6 for it and off we go. Has anybody ever
seen those UNIBUS video monitor adapter sets? I suppose they
were meant for PDP-11s, but I think running them with a VAX
would be way cooler. Might not be possible, and certainly would
involve some serious fiddling. But in a machine that has 10 or
more cards for just the CPU, a 4 board video adapter would be
the appropriate thing, wouldn't it? :-)
cheers,
-Gunther
On Aug 3, 12:30, Chris Kennedy wrote:
> Um, I've got a bunch of old 2.7 media. Let me know what
> architecture you need and I'll either stuff the ISOs somewhere
> for you to fetch or simply burn copies and ship them off to you.
> -----Original Message-----
> Is Solaris 7 still available anywhere? My CDs seem to have gone
walkabout,
> and it doesn't seem to be online anymore.
> --
> Pete Peter Turnbull
Thanks very much, Chris. I'll email you privately to work out the best way
to do this.
--
Pete Peter Turnbull
Network Manager
University of York
> Is Solaris 7 still available anywhere? My CDs seem to have gone walkabout,
> and it doesn't seem to be online anymore.
>
> Pete Peter Turnbull
I don't believe Solaris 7 was ever available online, there was the $20
hobbyist kit, which is kind of lame. Your best bet would probably be eBay,
BUT, I assume that's not really an option in your case.
Zane
On August 3, Francis. Javier Mesa wrote:
> from Cupertino? The machine was bought in the 80s (before Jobs left
> obviously) thus again it can not be an EL, since that line was introduced
> in the early nineties I seem to remember. I wonder if Apple still have
1991.
> their cray around, my friend told me that it was visible from the lobby of
> one of the buildings.... jobs seemed to like it because it looked so cool
A neighbor of mine worked for both Cray Research and Apple. He may
know someone who can check. I will ask him.
> think Jobs has ever produced an ugly computer..... although he reached his
> pinnacle with NeXT darn those were cool looking computers!)
Hell, I think they're STILL cool looking computers!
-Dave
--
Dave McGuire
Laurel, MD
On Aug 3, 8:30, Sergio Pedraja Cabo wrote:
>
> Hello. Anybody knows of somebody that could sell or obtain
> the two CIS (commercial instruction set) chips
> for one PDP-11/23 PLUS ? I have the Floating Point option installed
> and I'd like to has this option too.
In my experience, they're relatively rare. I've been actively looking for
a set for ages, and the last "spare" set I came across was about six years
ago -- and someone beat me to it :-(
--
Pete Peter Turnbull
Network Manager
University of York
