I might have the opporitunity to get a DEC 3000-300X machine for VMS (175 MHz 21064)
I know that 21(1,2,3)64 machines offer substantially improved performance, but for the moment they are out of reach.
The question- I'm running VMS currently on a VX42 (233MHz 21066A, 512k cache, 88MB RAM) Multia, and it is quite slow
(user response time with AXP-VMS v7.3-1)
SPEC-92 indicates that the DEC 3300X will be slower (84/100 for the 300X, 97/112 for (a generic) 21066A/233)
Likely, however, the 300X would have better I/O subsystems. Would it be worth messing with, or should I not bother (as far as
useablility, not number-crunching prowess)?
Anyone here know of a source for these parts these days?
---------- Forwarded Message ----------
Subject: [Electronics_101] RTL IC source?
Date: Tuesday 13 June 2006 08:20 pm
From: "geraldkrizek" <gkrizek at verizon.net>
To: Electronics_101 at yahoogroups.com
Does anyone know of a source of RTL ICs. I need several MC1013P ICs to
repair a HP sweeper. Thanks in advance.
Jerry
-------------------------------------------------------
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, a critter that can
be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
-----------------Original Message:
From: "Roy J. Tellason" <rtellason at verizon.net>
Subject: Re: Eico 435 'Scope manual
On Saturday 10 June 2006 04:38 pm, M H Stein wrote:
> While we're on the subjects of 'scopes & manuals, does anyone
> here have a manual for an Eico 435 oscilloscope by any chance?
I had (and maybe still have, with problems) a 425, think that might be close
enough?
----------------Reply:
Thanks for the reply, but I already have a copy of the 425 manual, as
well as an original Heath O-8 manual and some Tek stuff. Haven't
looked yet to see how much difference there is twixt the 425 & 435,
probably won't be too hard to troubleshoot w/o docs; was just hoping
that perhaps someone had a 435.
But thanks again, anyway!
mike
Jochen Kunz (jkunz at unixag-kl.fh-kl.de) wrote:
> The small desktop 3000-300 machines use PS/2 RAM. The large desktop and
> tower machines like 3000-500 / -600 use proprietary SIMMs.
I used to have a dec 3000-800, nice machine. Wish I'd kept it when I moved.
IIRC, the proprietary simms were used on a 256 bit wide memory path, so that
series had pretty zippy memory for it's time, much faster than the 3000-300
machines (if you could find the propietary memory). And the bigger machines
used more power.
Found a good listing of the dec 3000 machines here:
http://www.phys.ufl.edu/~prescott/linux/alpha/dec3000-sysinfo.html
Short version:
small low-end machines (used 72pin parity simms) were:
* DEC 3000/300
* DEC 3000/300L
* DEC 3000/300X
* DEC 3000/300LX
high-end machines (used propietary simms) were:
* DEC 3000/400
* DEC 3000/500
* DEC 3000/600
* DEC 3000/700
* DEC 3000/800
* DEC 3000/900
Jeff Davis
Dude...I got kicked off Lisalist plugging your stuph
lol. I hope you at least appreciate the gesture...
--- cctech-bounces at classiccmp.org
<trixter at oldskool.org> wrote:
> woodelf wrote:
> > Alexandre Souza wrote:
> >
> >> Describe me a CGA board on that media ;o)
> > Yuck!!!
> > I can't remeber anything I liked about CGA?
>
> I love CGA:
http://www.oldskool.org/pc/8088_Corruption
> (shameless plug)
> --
> Jim Leonard (trixter at oldskool.org)
http://www.oldskool.org/
> Help our electronic games project:
http://www.mobygames.com/
> Or check out some trippy MindCandy at
http://www.mindcandydvd.com/
> A child borne of the home computer wars:
http://trixter.wordpress.com/
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
tom:
Can you provide a source where I can purchase 11/16 inch wide spools of
paper (prefer yellow) for the reader mentioned above
Thanks
David C. Masterson
Research Scientist
Battelle
Advanced Materials Applications Group
National Security Division
505 King Ave
Columbus, Ohio 43201
614 424-5538
614 458-5538 fax
masterson at battelle.org
I have more stuff to give away :
a pdp 11/04. Just the processor unit.
An RK05 (untested) with 3 disk packs (2 new).
An Rs/6000 (basic model)
An Apollo (No PSU)
Some HP Unix machine (Never tested don't have the correct cable)
These are pick up from London.
I also have a cray el98 around 6 processors, 50 hard drives. Untested
and dismantled. Although it was working when disconnected. This is
currently in storage in London. You will need a large van either LWB
or a Luton. Taking offers on this as I have spent a lot of money on
storage and picking it up. I will accept trades though.
Dan
I'm pretty sure I could design and build a paper tape punch and reader
that uses plain old cash register tape and winds the tape on old microfilm
spools. Assuming the sprocket and data holes match standard paper tape,
what are some other caveats to look out for?
--
David Griffith
dgriffi at cs.csubak.edu
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
At 03:54 PM 5/31/06 +1200, you wrote:
>On 5/31/06, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
>> There was also a standard controller IC (it was a mask-programmed
>> microcontroller, I forget which one, but it was something standard --
>> maybe 6805-like), which was used in some of the desktop printers. It had
>> Centronics and 600 baud serial inputs.
>
>The controller in the C= 1520 is a 6500-family masked-programmed
>controller and only implemented the C= IEC bus, not serial or
>Centronics.
>
>> I have the Alps service documentation for this mechanism, but it doesn't
>> show the motor pinion separately from the motor.
>
>That's a shame.
>
>I've contemplated what it would take to make a "negative gear" in some
>durable material like aluminum and experiment with extrusion molding
>of a "slug" which would then be cut down to the right length. Since I
>have a few bare Alps mechanisms, I've also contemplated experimentally
>turning down the motor shafts if I were to ever find a matching gear
>that was the right size except for shaft diameter. Anyone else here
>have any ideas on how to solve the perpetual cracked gear dilemma?
I bought a CGP-115 new about 20 years ago and had the same gear problem.
I went to a TRS "computer store" and tried to order a gear but they
insisted that I had to have the printer checked out by their technician
before they would sell me one. After a bit of intense questioning they
finally admitted that there was a one hour minimum charge at something like
$40/hour! I told them to stuff it and I've seldom darkened the door of an
Trash Shack since. A year or two later I meet the manager of another TRS
store and I told him the story. He ordered 3 or 4 gears for me and they
only cost about $1. So the gears WERE available.
I've seen a crude but effective method of cutting gears by turning a
shaft of the desired od and then mounting it horzontally on a verticle
milling machine so that it can turn freely. Then mount a TAP vertiaclly in
the headstock and spin it slowly and then moving it slowly in against the
shaft. The tap will cut longitudinal (actually nearly longitudinal) threads
(teeth) in the shaft as you move it in. (You only need to move it in by the
depth of threads for the gear once you contact the shaft.) It will also
spin the shaft and cut threads all the way around. You will need a tap of
the same od and pitch (or as close as you can get) as the gear that mates
to the one you're trying to make. This will yield a lantern post shaped
gear instead of a straight one but for this application that should be even
better.
Another way to cut the gear is to turn a shaft of the correct od and
mount it in a lathe. Lock the headstock so that the lathe spindle, chuck
and shaft can't turn. Make a cutter that matches the shape and size of one
of the spaces between the gear teeth. (1) Mount the cutter in the tool post
holder and move it back and forth taking light cuts on the shaft until you
get the desired depth of cut. (2) Unlock the head stock and turn it exactly
the angle between the gear teeth and then lock it again. Reapeat steps 1
and 2 until you've cut all the teeth. The advantage of this method is that
you can cut a gear of just about any length. You can then cut them off to
the desired size and that will yield a number of individual gears.
FWIW THE standard reference for gear cutting is 'Gear Cutting Practice'
by Colvin and Stanley. My copy is dated 1937.
Joe
>
>-ethan
>
While we're on the subjects of 'scopes & manuals, does anyone
here have a manual for an Eico 435 oscilloscope by any chance?
Loaned 'scope & manual to a friend some time back; his wife threw
out the manual & scope came back DOA (but he's still a good friend).
TIA,
mike
