>> Are the SGI collectors just out enjoying the nice weather?
>
> With IRIX a dead end, I don't know how much people are going after
> them any more. My pair of O2's (I also have one with the slowest O2
> CPU) are the most impressive workstations I've ever seen, and I'd
> love to have an Octane 2, Fuel, or Tezro, but unless I get them
> locally for basically nothing I don't see me spending the money to
> get one.
There's something just, I don't know, wrong about the complaint that
IRIX is a dead end on this list. Discontinued, yes, but so is DOMAIN,
TSB, OS/8, CP/M ... and yet those machines are still
collected/used/discussed here. At this point, VAX OpenVMS is at roughly
the same position as IRIX- no new hardware and no major upgrades to
VMS. IRIX will be "unofficially supported" by usergroups for quite a
while yet-just look at Nekoware. They're still very well made machines,
and IRIX has its quirks, but it is a good, stable UNIX implementation
(and Indigo Magic is a pretty good UI). I suppose the collectors will
get to them (SGI does have a reputation), but for now I'm happy that
it's predominantly hobbyists- machines are cheaper that way. I haven't
been able to afford a PDP-11, but I have several IRISes. Just think of
yourself as being at the forefront.
> I was an intern at Tektronix around '79-80. Have you ever run across
> any scraps of info about the Tek 4016, 4081 or 4027?
> Used an under-powered eight bit micro (8085?) to interpret
> a complex serial command language and draw the graphics.
I used one around 1980. Graphics were constructed using a programmable
character generator, a la the Intecolor. It was similar to the 4025,
which is mono, which I do have info on at http://bitsavers.org/pdf/tektronix/402x
I've been looking for technical/service docs for the 4027 and 411x/412x series
for a while now.
> Hi
> Before I go to a dealer and maybe get ripped off. Has anybody in the
> UK got any DEC RRD4x series CD Drives. (Must work with a KZQSA)
>
> Rod
Why not just get one of the plentiful early Toshibas? I have a XM-3101
(same as the Sun SL-CD) that boots my VAX4k2 (KZQSA) VAXstation 3176
(int. SCSI), SPARCstation IPX, IRIS Indigo, etc. etc.
Hi,
I just received a DDC (Digital Development Corporation) 6200X series
fixed head disk. It includes all of the cables, power supplies and
controller for a PDP-11. Before I hook it up to one of my 11's, does
anyone have any docs on this beast?
Here are the specs as I know them:
Series: 6200X
Speed: 3450rpm
bits per track: 72000
access time: 8.7ms
tracks: 64
unformatted capacity (MB): 0.58
Supposedly there was no scheduled preventive maintenance, however DDC
made other fixed head drives that were helium filled and they needed
periodic service.
So, my question is do I need to do anything (like purge and refill)
before I use it? Does anyone have any additional info? I did get some
manuals with it, but they're mostly focused on the controller for the
PDP-11.
TIA.
--
TTFN - Guy
See item # 120128637318
I won an SGI Personal Iris 4D/20 (1988!) workstation. I was the only
bidder and I picked it up for $40. The cosmetic condition is
excellent.
Honestly, I expected someone to come in and snipe me at the last
possible minute, so I increased my bid twice.
The hard drive will be wipe, so I nee to get an OS package for this,
which is probably as hard as finding the hardware. In several years
of watching ebay for SGI gear, this is the first time I've seen a
Personal Iris offered up, although I admit that I haven't had a
specific search for it, so one or two may have slipped through the
cracks.
Are the SGI collectors just out enjoying the nice weather?
--
"The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download
<http://www.xmission.com/~legalize/book/download/index.html>
Legalize Adulthood! <http://blogs.xmission.com/legalize/>
Hi
I am curently investigating shipping costs between the UK and US.
As collectors we don't need next day delivery but we do need full cover
insurance.
Don't go away. The cost is not that bad.
Rod
-----Original Message-----
From: cctech-bounces at classiccmp.org
[mailto:cctech-bounces at classiccmp.org] On Behalf Of Richard
Sent: 10 June 2007 00:12
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: My sale or swap list (Update)
In article
<86505602FE0FBB4CB9DE54636AA48D39022FC9 at EDISERVER.EDICONS.local>,
"Rod Smallwood" <RodSmallwood at mail.ediconsulting.co.uk> writes:
> VT 420 x1 (-)=20
> LA75 x1 x1 (-) =20
> HP 700 Terminal
> HP 2392A Terminal x1
Too bad you're on the wrong side of the pond...
--
"The Direct3D Graphics Pipeline" -- DirectX 9 draft available for
download
<http://www.xmission.com/~legalize/book/download/index.html>
Legalize Adulthood! <http://blogs.xmission.com/legalize/>
What can I say! Evan and M.A.R.C.H. have put on quite the show so far ->
Vintage Computer Faire - East (4). What will happen today?
Yesterdays presentation by Chuck Peddle of Commodore fame was music to the
ears. Computer pioneers, some heralded, some not, are the reason we all can
enjoy and share our passion of classic computing.
Forever computing all!
Murray--
dwight elvey wrote:
The only two things I can think of where mentioned by others. One
was thermal conductivity and the other was friction. Helium has almost
zero friction.
Still, the stuff leaks out of things so fast. Even solid surfaces.
I find it funny that it is cheaper than argon. There is a lot of
argon but I'd guess the extraction from natural gas, where it
is undesired for burning, makes helium cheaper than argon that has to
be intentionally removed from air. Two percent of air is argon
as I recall.
Dwight
-------------------
Billy writes:
Helium was used in a lot of early fixed disk and drum systems. There were
several reasons for helium, but the main one is it gives good flying head
support. Less dense than air, it allowed the heads to fly closer. It also
offered less resistance than air, hence less power. And there was something
about it having less boundary layer pressure at high speed, a good thing
when you are trying to increase density.
It was a bitch to seal in, so most systems sealed the entire assembly with
only I/O cable connectors on the outside surface. I worked on a drum system
using helium in the late 1960s and we had to change the cylinder about once
a month. The cylinder was 20 cubic feet.
One other application I heard of was for high altitude airborne systems.
The air was too thin so a positive pressure system was used with helium.
Since the application was military, not much was written about it. This was
also the same application that used a micro drum (roughly 3 inches long, 1
inch in diameter.).
Billy
