>
> What are some good old computers manufactured in 1986?
>
Well, my Prime 2455 is one example...
That *may* be the year John's Cyber 180/960 was built...
Any Apollo workstation made that year...
Oh! Oh! Didn't the Mac II premiere in '86? Or was it '87?
IBM RS/6000? Kaypro 2000?
-dq
In a message dated 4/2/02 5:05:52 PM Eastern Standard Time,
r_beaudry(a)hotmail.com writes:
<< A bit too new to be on topic, but... I was scrounging through some stuff
yesterday, and unearthed a set of original diskettes for an IBM PS/1.
>>
do you know what model PS/1?
old computers, old cars and sundry items
www.nothingtodo.org
> > > Loboyko Steve wrote:
> > > WW sockets are getting more expensive. I won't use
> > > anything but machine tooled pin sockets, which are
> > > even more expensive. Buf going nuts and wasting your
> > > precious free time over a flaky socket is really,
> > > really expensive.
> >
> > I, too, can recommend only going with machined-pin sockets; anything
less
> > isn't worth the hassle of trying to chase down phantom problems. This
> > goes for soldered designs as well as WW.
>
> I'll 'third' it...
>
> I will use nothing but turned-pin sockets (that's what they're called in
> the UK) now. I once spent most of a day tracking down a fault that was
> caused by a flaky contact on a folded-metal type of socket. Never again.
> I've got more enjoyable things to do...
Speaking of machined parts versus something else...
Anyone notice how commodity PCs have screws that have clearly
been *cast* onstead of *turned/Machined*? Everytime you thread
one into a hole, you generate a nice supply of metal shavings.
Not good.
To get back on topic, when did this trend start? The IBM PC,
PC/XT, and PC/AT used machined/turned fasteners. Lots of classic
non-consumer hardware used various "captive mechanisms" instead
of plain old screws and bolts.
And how about sharp edges inside a chassis? Older hardware tends
to have spent a little time in the hands of a whitesmith, who
added lots of finishing detail like smooth edges that don't cut.
-dq
> From: Tony Duell <ard(a)p850ug1.demon.co.uk>
> > The text refers to 2x2114 or a 4118 installed in the UK version and a
> > 2K option for export - possibly there are 2 versions of the board?
>
> OK, I've pulled my ZX81 apart. The PCB claims to be 'Issue 1'.
I have never seen any board marked "Issue 2." Did it exist?
> So, fit L2 if you install a 6116 (A10 on pin 19). Fit L1 if you install a
> 4118 (I am not sure what pin 19 is, I can't find a 4118 data sheet, but
> at least one schematic I have calls it 'E', presumably an active high
> enable signal). Fit either or no links if you install 2 * 2114s. Never
> fit both links, or you'll short A10 to the +5V rail.
Today I checked out about two dozen ZX81/TS1000s. They've been piling up
in a box and today I finally got to them. Here's what I found:
All of the 1K boards had two 2114s and no jumper installed.
All but one of the 2K boards had a single 2016 and L2 was installed.
One 2K board had a 6116 and L2 was installed. The board was operational
and appeared unmodified.
I replaced a socketed 2016 on a working board with the 6116 pulled from the
above-mentioned board,
and the board still worked.
So I think it's safe to say that L2 is required for a single-RAM-chip
board, and that a 6116 is a drop-in replacement for a 2016.
Never did see a 4118. Perhaps the use of it would change things,
jumper-wise.
Glen
0/0
>From: "Douglas H. Quebbeman" <dquebbeman(a)acm.org>
>Reply-To: classiccmp(a)classiccmp.org
>To: "ClassicCmp List" <classiccmp(a)classiccmp.org>
>Subject: Pr1marily Contented (Longish)
>Date: Mon, 1 Apr 2002 23:23:03 -0500
>
>Now that my Prime 2455 is fully operational again, I
>want to thank everyone who offered advice here. After
>giving up on repairing the power supply, I decided to
>buy one.
I assuming you don't need the one I have set aside?
SteveRob
_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp.
Ok. I wonder what would happen if I stuck a DWBUA in the BI cage of my
VAX 7000-650, and added a UNIBUS cabinet, then I were to take a Qniverter
and add a Qbus framebuffer?
Peace... Sridhar
> -----Original Message-----
> From: Douglas H. Quebbeman [mailto:dquebbeman@acm.org]
> Chris Smith and I were discussing repair techniques offline, and the
> above were amongst the discussed techniques.
> However, I prefer erecting totems next to the troublesome devices...
I still maintain the usefulness of runestones, incense, and rituals
involving chant and the drawing of "signs of power" around the device.
Chris
Christopher Smith, Perl Developer
Amdocs - Champaign, IL
/usr/bin/perl -e '
print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n");
'
On April 2, Christopher Smith wrote:
> AT&T Unix PC. 512k to 4M of ram [usually 1M], 40 to 60M hard drive,
> all in one system with a monochrome green screen, removable keyboard,
> and 3 button mouse. It also had a 5.25" floppy. It ran Unix SystemV
> R 3.0 or 3.5, I vaguely remember a port of some other system to run
> on it. Check some of the web pages you can find. There was a built
> in graphical windowing system, dynamically loadable drivers, and if
> you could get the ethernet board, or extra serial ports, you could
> run multi-user configurations. It could read/write (through special
> bundled software) MS-DOS disks, and there was also a DOS board for it
> with an 8088 CPU or something like that, and some RAM to let it
> actually run DOS, and DOS apps.
What wonderful machines these are. The first ones, though, shipped
with 10MB drives, not 40MB, and it was SYSVR2, not 3.
I sold these machines at a computer store when I was in high school,
and later had one of my own as my first real UNIX machine. Stupidly I
sold it many years ago. Thanks to the assistance of a fellow lister
(hi Mark!) I finally have one now, which I will keep forever.
-Dave
--
Dave McGuire "...it's leaving me this unpleasant,
St. Petersburg, FL damp feeling on my shorts..." -Sridhar
> -----Original Message-----
> From: blacklord [mailto:blacklord@telstra.com]
> And it's the best one (subjective) out of all the others so far
> mentioned. An A1000 can still happily run just about anything you can
> throw at it, plus it's emminently expandable.
... if you can find the expansions. :)
Personally I like the Intergraph on my list. Never seen one, but if
I had, I would own one by now.
As for a more common system (more common than the Intergraph, not the
Amiga), a UnixPC with 1 meg of ram, and maybe 60MB of disk will give
you access to a really decent subset of available Unix (and possibly
MS-DOS) software. It will also have a decent development environment,
given the installation of a dev kit.
On the other hand, the Atari ST plays quite a few more games. :)
Chris
Christopher Smith, Perl Developer
Amdocs - Champaign, IL
/usr/bin/perl -e '
print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n");
'
