CPUs could have emulated guts, either software or one off hardware
designs, with replica enclosures and front panels. That feels like it
would result in a reasonable result for the effort required, but
mechanical I/O will be the tough bit. I have recently mulled over the
idea of constructing a PDP-11/04 replica; I imaged a bent metal case, a
replica programmer's front panel, and an internal PC mother board
running SIMH would be feasible, but I have shuddered at the thought of
trying to interface it to 8" floppy drives (if I could find any), or
building a card reader and line printer.
BTW: What is the origin of this message? I cannot find it in my mail
archive.
David
-----Original Message-----
From: cctalk-bounces(a)classiccmp.org
[mailto:cctalk-bounces@classiccmp.org] On Behalf Of ben franchuk
Sent: Thursday, 25 March 2004 12:45 PM
To: On-Topic and Off-Topic Posts
Subject: Computer Replica's
<SNIP>
So lets have your vote for what replica's of old computers
that need to reconstructed at a functional level -- blinking
lights, mechanical I/O but it need not be the same hardware
level.
<SNIP>
So lets have your vote for what replica's of old computers
that need to reconstructed at a functional level -- blinking
lights, mechanical I/O but it need not be the same hardware
level.
--
I'm biased towards machines that no longer exist, but have
surviving software:
SDS 940
BCC 500
A Xerox Alto using modern components would be interesting
as well. It would easily fit into a medium sized FPGA now.
David Brownlee <abs(a)absd.org>, do you have any other address I might
try writing to? Mail to you at that address fails after five days "451
Could not complete sender verify callout", apparently because the
verify code was too impatient and tried to send something before
getting the greeting banner.
/~\ The ASCII der Mouse
\ / Ribbon Campaign
X Against HTML mouse(a)rodents.montreal.qc.ca
/ \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B
actually, the usual switches these days on PC computers are only
logic switches back to the power supply. The power supply does
"tap into" the ac line to get a little power it needs.
My P4 that I built last year uses an ANTEC case and there is
no AC going out to a front panel switch - it is only a push button.
A good rule of thumb is that if a switch clicks then it probably
has AC on it. If it doesn't then it MIGHT be only low voltage.
As an electrical engineer, I would not take the chance and assume
it is low voltage without checking.
Any computer that is pre-ATX will have AC voltage on the power
switch. Some early ATX and maybe even now (I don't know for sure)
may still have a real switch out front.
The older mini-tower systems that have a power switch out front
usually had a AC connector on the back of the power supply and
a four conductor cable that ran out to the power switch. The
power could tap into the AC line without affecting the switch
out front.
The older NEC, etc systems sometimes had a seperate power suply
with an AC connector and cables, etc that were not integrated
into the power supply like the PC, AT, ATX supplies that came
along.
best regards, Steve Thatcher
>--- Original Message ---
>From: meltie <lists(a)microvax.org>
>To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk(a)classiccmp.org>
>Date: 3/24/04 7:23:31 PM
>
On Wednesday 24 March 2004 23:45, William Donzelli wrote:
>> > Assuming the switch functions correctly (and is wired correctly),
>> > the behaviour of a device with such a switch in the off
position
>> > is pretty certain: it's identical to a device that has the
>> > mains lead pulled out.
>>
>> Not completely. The cord, all the way to the switch, is still
energized.
>> And remember, many of today's devices are not always completely
off -
>> they might tap into the line just a little bit (clock, for
instance).
>
>How is this different from a circuit that doesn't chop both
conductors?
>
>alex/melt
>
Hi,
I've got a generic PC/XT 8088 clone (contains NEC processor) with no HDD
and two 5.25" FDD. Needless to say that the media as well as the O/S (M$
DOS) is not available in my local market. I was wondering if it's
possible to:
(1) Install a 3.5" 1.44MB FDD in it.
(2) Acquire FREEDOS and boot the machine
(3) Use some sort of DOS terminal program to connect to a Linux machine
Appreciate any help and guidance.
Thanks.
Hassan
A while back someone asked about getting blank 1/2 tapes. Here's a great
contact....
Magnetic Products & Services, Inc.
Kristine Hunter
khunter(a)mpsinc.org
www.mpsinc.org
I was quite happy with my purchase from them of blank 1/2 tape media.
Jay
Hi folks,
I think I posted this on here first but I'm not sure :)
Anyway, (slight OT drift here) my '97 vintage 21" PCXAV monitor (the one
with the paper-white case & trinitron screen) has decided to start
flickering and dimming itself. Lee's already given me a couple of pointers
but I thought I'd ask here too in case he's not about.
I've got the PSU here and there's a couple of things on there that make me
worried:
http://www.wowrarelook.co.uk/resistors.jpghttp://www.wowrarelook.co.uk/burnt.jpghttp://www.wowrarelook.co.uk/solder.jpghttp://www.wowrarelook.co.uk/solderside.jpg
The middle 2 are the front and back of the same components on the board.
Should I be worried that so much solder is escaping/has escaped from the
joints? Also the soldering in 'solder.jpg' looks decidedly iffy. I haven't
checked the resistors yet to see if they've failed.....is it normal for them
to get so hot they burn the board?
Probably more pix to come when I get the logic board out :oD
cheers
--
Adrian/Witchy
Owner & Webmaster, Binary Dinosaurs
www.binarydinosaurs.co.uk - possibly the UK's biggest online computer museum
www.snakebiteandblack.co.uk - ex-monthly gothic shenanigans :o(
If anyone can help him, please contact the original poster.
Jay
----- Original Message -----
From: "Rice Billy" <Brice(a)ambac.net>
To: <jwest(a)classiccmp.org>
Sent: Wednesday, March 24, 2004 11:06 AM
Subject: pdp 11
> My company uses an Adcole cam inspection system that uses a PDP 11
operating system.
> We need our master disks which are 8", copied. We have a new box of disks.
Do you know of anyone who has the capability and would do this for us.
>
> Billy Rice
> Maintenance & Facilities Manager
> Ambac International
> (803)-462-9601
>
>
---
[This E-mail scanned for viruses by Declude Virus]
>probably at the expense of the multiples of
>classics I've got!
Before you junk the Classics, open them and pull the RAM card if it is
present. They are getting harder to find and you should be able to sell
them.
-chris
<http://www.mythtech.net>
ben franchuk <bfranchuk(a)jetnet.ab.ca> wrote:
> I favor a simple techological base for MARS
> since I could not be independant with having to rely on some EARTH
> patent or custom chip
Patent?!?! We won't honor no fucking patents! I'm the reincarnated Karl Marx!
My new VAX will be completely open source hardware: I'll open-source the Verilog
code. There will be no problem with fabbing it right there on Mars.
> BTW Travel to MARS is keeping me from claming my 3.125 square miles
> of land.
I'm sorry to inform you, but your title to that land is invalid. The same goes
for everyone selling and buying land on Moon and Mars. That land belongs to the
Galactic Federation. The Federation will give that land for free to any
refugees from Earth fleeing from capitalism and seeking to live a completely
egalitarian society without money or property, but if you start claiming
property, we won't respect your claims any more than we respected the feudal
landlords of czarist Russia we overthrew in 1917.
MS
