Eric Smith <eric at brouhaha.com> wrote:
> It can also be caused by use of a cheap video cable or a cheap KVM switch.
Not the case here - genuine DEC video cable and no KVM switches.
MS
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>> <http://www.gcn.com/17_17/news/33727-1.html>
>
>Another myth.
>
>What happened was the _application_, not Windows, had a flaw (a divide by
>zero bug).
Read the bottom of the article, where they state that numerous other
software failures on the Yorktown are associated with using Win NT.
I think the real lesson here is, don't let any computer be your sole
method of controlling a warship... didn't these people watch
Terminator?!? :-)
-chris
<http://www.mythtech.net>
Got it...thanks.
I had a line on a 11/94. The guy works at a wind
tunnel in a defense plant and they had oodles of DEC
stuff. I know he has the engineering drawings for it.
All he wanted was beer and pizza of all things. I
haven't had good luck getting back in touch with him
but if (when) I do, I'll get the drawings out to you
for bitsavers.
Thanks,
Brian.
--- Al Kossow <aek at robot.net> wrote:
>
> Also looking for a
> manual, DEUNA, RL11 for it as well.
>
> --
>
> http://www.bitsavers.org/pdf/dec/pdp11/1184
>
> Something that would be nice to find are docs on the
> 94, and engineering
> drawings for either the 84 or 94. They appear to be
> very difficult to find.
>
Thanks to several folks who offered suggestions and/or were willing
to try to duplicate my setup to see if they could find a solution.
I did manage to get this to work. I used the RK8ESY driver.
This is the configuration I ended up with:
.R BUILD
$PRINT
RK05: *RKA0 *RKB0 *RKA1 *RKB1 RKA2 RKB2 RKA3 RKB3
RX01: *RXA0 *RXA1
KL8E: *TTY
LPSV: *LPT
TC : *DTA0 *DTA1 DTA2 DTA3 DTA4 DTA5 DTA6 DTA7
RK8E: *SYS RKA0 RKB0
which means I had to delete the TC08 driver.
I tripped a bit over zeroing the device, but finally got that right.
Also, I can't find anything in the manual about how files are supposed
to get from the distribution media to the system disk, so I just used
COPY and hoped it would work. (So far so good.)
Obviously my notes weren't good enough. Shoot me now.
My next problem is that FORTRAN IV programs hang when executed.
De
>
>Subject: Re: OT Don't read this (was Re: Altair MBL source)
> From: shoppa_classiccmp at trailing-edge.com
> Date: Mon, 02 May 2005 13:12:33 -0400
> To: cctalk at classiccmp.org
>
>> Apparently the whole area gets flooded with halon (sp?) to quickly absorb
>> any oxygen from the air, so if you hang about ......
>
>"Absorb any oxygen" is a bit harsh. Halon is pretty good at stopping
>things from burning but it doesn't make it impossible to breathe. It's
>not the most healthy thing to breathe but in the 80's and earlier a
>very common demo of halon extinguishers had the salesman in a halon filled
>booth, demonstrating how all fires go out, while happily breathing the
>stuff.
>
>Now, CO2 oxygen-displacement extinguishers, that's a different story.
>
>Tim.
Halon does not absob Oxygen. It is an Oxygen displacement that is
also heavier than air. In a closed room if enough is introduced
under pressure (typically) it will push out all air (Oxygen too)
leaving an unbreathable and incombustable mix. Because computer
rooms are largely closed any major air displacement is dangerous
for the users inside.
A bunch of years back I was working at a pharmaceutical plant doing
controls. While I was in a HEPA closed filling room some dolt fired
up a Freon (R12) system used to pressurize the containers without
checking to see if the lines were properly capped. Those 75GPM
pumps were pushing liquid Freon that initially I thought was Glycol
for cooling. It took only a few seconds for the Freon to vaporize
and reduce the breathable air to nil by displacement. In the few
seconds it took to evaluate what's going on and get out I was
quite hypoxic. My boss was extremely upset with the dolt. I spent
many months after that doing lockout/tagout training and used
that case as the what can happen.
Halon and Freon are similar in that they are "non toxic",
incombustable and generally electronics friendly in the gas form.
But life is only supported by Oxygen, anything else while not toxic
is not breathable without causing hypoxia.
Allison
It is a signal generator with a small TTL computer built in. The front
panel is like that of an old PDP-11, with switches and LEDs to input
programs. Does anybody have the manual/spec of this TTL computer? it
has several memory boards with 93L420(256bitx1) or 93L425(1kx1) chips.
I am trying to decide what to do with a bunch of 16-bit ISA IDE/Floppy
controller, etc. cards. Is there still a use for them, or should I just
add (most of) them to the (rapidly growing) scrap reclaim box? What
about 8-bit and/or 16-bit ethernet cards, no-name 8-bit serial/parallel
cards, older style floppy disk cables that still support the 5 1/4"
floppy drives? Maybe a better question; are they any cards worth saving?
I am keeping all the disk controller cards, memory expansion cards, and
any specialized cards. Are they any Apple IIx cards worth saving? My
general rule there has been that if I have the docs, they are worth
saving.
I have boxes of this stuff spread around and am looking for some
guidelines on what might be worth keeping! I am getting to the point
that anything past about 1984 or so goes.
Whew... I just spun it up and its definitely not the
fan. I am going to pull it apart this weekend and see
what I can find. I do have access to a press if the
bearing can be pressed off. I did grab the drawings,
thanks.
Brian.
--- Tony Duell <ard at p850ug1.demon.co.uk> wrote:
> > Haven't tested the RA80 that came with it but the
> RA60
> > sounds like it needs bearings BAD. Any suggestions
> on
> > restoring this RA60 would be appreciated.
>
> I've got an RA60 that I really must get round to
> playing with... IIRC the
> printset is on bitsavers...
>
> As for the bad bearings, if it's the spindle itself,
> you've got problems.
> There's no way you're going to take one apart and
> replace the bearings.
> IIRC it's all pressed together (and sufficiently
> tight that no normal
> gear puller will shift things), you may well find a
> ferrofluid seal in
> there, etc.
>
> If it's the spindle motor, you can almost certainly
> do something. The
> motor will come apart, the bearings are most likely
> standard.
>
> Of course if you're very lucky, it's just the fan
> ;-)
>
> -tony
>
>
At one of my usual electronics surplus stores the other day, they told me
"If I'm into old computers.... go see this scrap dealer" and gave me the
address. My interest was piqued, as it was not one I was already familiar
with. So, I headed out there today.
Interesting place... 8 acres... most of the stuff was inside crumbling
warehouses, some was outside in the elements. I believe I saw a deuce and a
half ;) But anyways... on to the computer stuff I noticed...
One of the lowboy HP cabinets (about 2.5 feet tall) with a 13037 subsystem
and 7906D drive mounted. The formica top was missing, but the insides looked
pristine. I already have one of these (with formica top), but may pick this
one up just to have a spare. They are perfect for a mobile drive (as mobile
as a 190 pound drive gets) and you can set a terminal on top (but don't
bother trying to read the screen when the drives voice coil is moving). I
may use the 7906 as a donor to get another 7906 working... anyways...
I noticed a large floorstanding Silicon Graphics machine, didn't get too
close to it but I think it said "IRIS" on it.
Summagraphics graphics tablet.
A large seven foot Digital rack with a processor, tape drive (TZ07), scsi
drive tray w/drives, RD42? (cd, no caddy). Dusty, but very good condition. I
may buy the TZ07. I couldn't see anything saying what kind of cpu it was.
The cpu tray had the cpu on the left, and 3 or 4 what looked to be hard
drive modules in front too. No clue what that is, I'm not familiar with that
era of DEC gear.
Saw another TZ07 too just sitting loose - it was a desktop enclosure - I may
snag that too.
Oh, there was a neat dual bay olive green rack - I'm guessing it was some
time of automated fire control for a military gun. Appeared to have front
panel buttons like "turret position, reload time, etc.". I think most of the
guts were westinghouse perhaps. Didn't appear to be (to me) an obvious OEM
cpu or anything. Quite old.
There were selectric typewriters by the palletfull.
Some huge floorstanding HP plotter... the front panel said something to the
effect of "HP Plotter model I". No interest to me.
Much to my joy - the guy who owned the place was just what us collectors
would hope for. Soon as I walked in the door he wanted to know what kind of
stuff I was looking for, my cell & home number, etc. He took copious notes,
and told me matter of factly he'd keep an eye out for the kind of stuff I'm
interested in and definitely call me immediately. Seemed most helpful. And
better yet, he said they have another location about 10 minutes away, but I
didn't have time to go look there. The guy did say "you do know stuff from
that period had decent amounts of gold in it", and I told him sure, and I'd
be happy to give him more than scrap value for stuff I'm interested in.
So, next weekend probably I'll go check out the other place. Note to self -
next time, take a flashlight, wear boots, and plan for more time - not every
area was searched.
Regards,
Jay West
