Ok, here's something very cool as far as IBM PC artifacts go. Its an "IBM
TPC 4 System Unit" (the model is 4459). Its a tempested PC! Its
basically an unfinished PC case inside a bigger case that provides the
shielding. The connectors in the back all extend out to the outer shell,
which has a metal screen around the connector openings. The power supply
power plug connector is a threaded round connector. The power switch is
relocated as a radial knob on the front of the chassis. Its got a 5.25"
floppy drive and a hard drive (can't wait to see what's on it) enclosed in
an inner cage to sheild them. The motherboard is a 256-512K version.
The cards inside are pretty standard (I/O, hard drive/floppy
interface, expanded memory). Very neat.
Anyone ever heard of this?
Sellam Alternate e-mail: dastar(a)siconic.com
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Hi,
>If it has a hard drive, it was probably not used as a Tempest machine.
>The TPC I have contains only two floppy drives, and my understanding
>is that a tempest machine must have media that can be removed
>and cannot have fixed media.
I found a bunch of XTs in Tempest casings at a scrapyard in Oxfordshire about 6
years ago. All of these machines had a single 360K floppy, a pair of Bernoulli
removable drives and (I think) a tape drive.
No fixed media in sight!
Didn't find anything other than the machines themselves though, IE no
keyboards, monitors.
TTFN - Pete.
--
Hardware & Software Engineer. Sound Engineer.
Collector of Arcade Machines, Games Consoles & Obsolete Computers (esp DEC)
peter.pachla(a)virgin.net |
peter.pachla(a)vectrex.freeserve.co.uk |
peter.pachla(a)wintermute.free-online.co.uk | www.wintermute.free-online.co.uk
--
Thanks all. Problem solved. No idea what was wrong or why it didn't work.
In the process of one of the reboots, it decided to talk again.
Thanks to everyone that helped.
Kevin
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<At the risk of sounding fundamentally stupid, what's a tempest machine?
<
<Kevin
Any computer that has been hardend to not radiate _any_ EMF. The
assumption is that any signal radiated can be analysed and reconstituted
to recover the information. So shielding, LOTS of shielding is used.
I've seen PDP-11, VAXen, PCs all done up this way.
Allison
Yes, I can tell you how they're related . . . it's a temporal relation,
though, not a contextual one. ('nuff said?) I hit the send button at the
wrong time, having inserted a piece of text in the wrong place. (I think
!??).
I thought better of remarking that though a number of folks, myself
included, didn't particuarly like the TI 99/4, that didn't make it worthless
as somebody had implied.
Unfortunately, I must have overflowed the stack (mine, not the computer's)
and put that other paragraph in the wrong place.
Dick
-----Original Message-----
From: Tony Duell <ard(a)p850ug1.demon.co.uk>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Tuesday, August 03, 1999 5:04 PM
Subject: Re: (no subject)
>>
>> Since I have their latest CD, I have all the data sheets. What I'm after
is
>> the information about the logic cell resources, clock drivers, routing
>> resources, etc, generic to each family and not specific to a given
device.
>> The individual sheets seldom have that data.
>
>The message you're replying to seems to be talking about the TI99/4A home
>computer. The above paragraph seems to be talking about some kind of FPGA
>or PLD devices. Perhapes somebody can enlighten me as to how they're
>related..
>
>-tony
>
Most of the paper tape software that I have is on rolls, not fanfold. So -
unlike my nice PDP-8 PC04 that folds paper tape that was just read all
nicely on one side..... after reading a tape roll on my HP I have a very
large and fragile mess of a tape pile on the floor.
I'm sure that many of the inventive folks on the list have come up with
interesting ways to re-roll paper tape after it's read (short of the "by
hand" route that takes forever). I don't have an electric or manual tape
winder, but figured people around here had found some other thing that would
do it well.
I *THOUGHT* I had found a great solution - one of those old fashioned hand
crank drills. I wrap the paper tape tightly aroung the tip (without a bit in
it), set it point down on a cushioned chair, turn the crank and viola - my
tape rolls up quickly. However, last night as I saw my cherished diagnostic
configurator tape slide right into the gears of the drill, I figured I had
better ask for other solutions <grin>.
Is there something common around a typical house that folks have found works
well for winding paper tape rolls?
Thanks!
Jay West
You wrote...
>I believe that ppp0 is the default gateway on my p166.
ppp0? I'm a freebsd person myself, not linux, but isn't ppp0 the SLIP/PPP
interface over a serial connection? I thought we were talking ethernet
here...
>Trying 192.168.1.2...
>telnet: Unable to connect to remote host: No route to host
Aha...
How can you have an IP address/subnetmask on the interface without getting a
network (192.168.1.0) route via your ethernet interface? Since there's no
route to the host, just show us the output of a "netstat -rn" (that's a - r
n not a -m) on each machine and that will show the problem for sure. Also,
in your configuration I would suggest not running any routing daemon
(routed, gated, etc.) - they'll just get in the way.
Jay West
>correct voltages. The drives may have mechanical ill.
The most common "mechanical ill" these days is the drive belts falling
off. Funny, how it's hard to read a disk that isn't turning :-).
Tim.
>BTW, I also have a tempest Macintosh 512K, and a tempest HP inkjet
>printer. I guess I now have enough stuff to create a collecting
>subcategory :)
What's your tempest Mac 512K like, Sam?
Is it similar to the one I've got at
<http://www.applefritter.com/macclones/techmatics/index.html>?
Tom Owad
---------------------------Applefritter---------------------------
Apple prototypes, Apple II & early Mac clones, and the Compubrick.
------------------<http://www.applefritter.com/>------------------
