An interesting 3 hours on PBS last night:
- 'Steve Jobs - One Last Thing': No description necessary.
- 'Long Distance Warrior': McGowan/MCI's David & Goliath battle with AT&T
and disastrous merger with Worldcom.
- 'Digital Man/Digital World': Ken Olsen/DEC's growth and ultimate decline.
(No doubt everyone here except myself had already seen this one ;-)
Interesting comparison of the different styles and personalities of three
men who profoundly influenced the tech world of today and their companies.
Thoroughly enjoyed it.
I bought the Tek 4051 on ebay today; Jason brought it to my house and it works perfectly, with about a half hour of programming instruction my 12 old daughter was plotting a cat face.
I would like to get in touch with other users of this first personal computer, and find additional resources.
Do you know where I can find an archive of BASIC programs for this?
Has anybody built plug in cards in the back, mine came with a realtime clock and a "file manager", I do not know what that one does.
I have some Tek scopes with IEE-488, and I will see if I can get the IEEE interface working.
There was a DC300 tape in the machine:
The belt is broken in the tape, I have ordered some new DC300's and will transplant the tape.
Any resources will be welcome!
Then why not use a dip compatible version of the DS chip? I mean yes this allows for switchable battery which is very nice but SMT soldering is not for everyone.
I wonder if there is a way to determine if there will be BIOS issues by switching the DS12887?
-------- Original message --------
From: Jon Elson <elson at pico-systems.com>
Date: 1/22/17 9:16 AM (GMT-08:00)
To: General at classiccmp.org, "Discussion at classiccmp.org:On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
Subject: Re: DS12887 pcb substitute with battery
On 01/22/2017 10:07 AM, Ali wrote:
> I thought the problem with switching these chips was that part of the ROM code was embedded in them? I.e. it isn't just an issue of battery? Am I wrong? If I am then why not use one of the replacement chips that are available?
These don't have a lot of memory on them.? many early PCs
stored some config info there, but generally the BIOS can
reconstruct it if it isn't there.? I suppose there is a
possibility that random data in the CMOS memory could cause
the BIOS to try to use unavailable features and hang.? I
don't think anybody put actual executable code in there.
> Date: Thu, 19 Nov 2015 21:41:53 -0500 (EST)
> From: ethan at 757.org
> Subject: Re: Could someone make this topic go away?
> Message-ID: <Pine.LNX.4.64.1511192141030.32673 at users.757.org>
> Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
> Am I the only one left using Pine!?
> I get odd looks when I'm checking email from my cell phone.
No you are not.
I use (al)pine on my OpenVMS system here as well as my main Linux host. I
have mail going back to 2004 here and since 1996 at another public access
Unix host I use. It's great when I'm out of town and can ssh in from my
phone and check the mail. :) Pine does most everything I need without
having to worry about malware, phishing, etc ... the beauty of text.
since the messages in May about the MS Windows 1.0 version for DEC Rainbow,
I did some research to see if a version is effectively available.
It seems that copies of this software are really difficult to find, but
a complete copy
was available on the latrobe ftp DEC Rainbow archive... which
disappeared with all valuable data...
Anybody has a copy of the content before the deletion?
Anyway, I found a file-by-file copy of it, on this site:
For preservation reasons, it would be really better to have an original
Any news about dumping the disks or an ftp archive where they are present?
I'm making arrangements to have four (mini-)supercomputers from the
1980's shipped to me. In the mean time, I'm trying to find out what I
can about these systems, so this is a fishing expedition.
The systems are:
* Convex C1-XP
* Convex C1-XL
* Intel iPSC/860
* Ardent Titan
Pictures of these can be found on my website, at
(click on the thumbnails to see a larger version)
I'd like to get in touch with anyone who knows anything about these
machines, as well as anyone who may have documentation, but I also
have two specific questions:
- Can anyone identify the tape drives shown in the pictures? I believe
the one in the Intel iPSC/860 is an Exabyte 8mm one, but the ones used
on the Convex and the Ardent are a mystery to me.
- Does anyone know what the SRM (System Resource Manager) for the
iPSC/860 physically looks like? Does it look like a PC, and does it
say Intel on the front?
Reason I'm asking is that I'm getting these out of an estate, and I
need to tell them what to look for.
> From: Klemens Krause
> We clean our RK05 disks in a very robust way: with cheap burning spirit
> and paper towels. ... We rubbed away thick black traces from occasional
> head crashes and we never removed the oxide coating with this torture.
I am about to get a large batch of RK05 packs, so I am interested in the
details of this.
First, what is 'burning spirit'? (I assume this is a straight translation
into English of some German term, but not knowing German... :-) After poking
around with Google for a while (hampered no little by the fact that it's the
name of a band, and also a term in World of Warcraft :-), it seems like it
might be acetone?
The RICM is working on the skew adjustment on a TU56 tape drive on a
PDP-12. We only see a 5mV signal from the head, so when we flip the tape
over we will only see 1mV. This is below the capabilities of my 'scope.
The DEC skew adjustment procedure talks about using a DEC amplifier to
boost the head signal to several volts. We are planning to make an
equivalent amplifier using a modern Op-amp. It would be really convenient
to have one of the Amphenol 133-022-03 connectors from a G851 Relay module
on our amplifier so it would plug directly into the head cable.
Does anyone have a DEC G851 module that we could remove the connector from?
Hello from a newbie to the list
I've just acquired 2 HP 382's with expanders. Have not had the time to look
inside them yet.
End goal is to set one up as an instrument controller i.e. using the built
in GPIB and potentially a 2nd GPIB card.
One thing I do not have is a display, keyboard and mouse.
A few question
Is there a PS/2 or USB (yea long shot) adapter for the HPIL interface ?
Does someone have a keyboard/mouse they a not beholding to, or know
where there maybe one ?
Once I get the opened up and take an inventory, anything I should look out
for be trying to power one of them up ?
Can one boot to a terminal on the RS-232 port. Until I find a kbd/mouse ?
What would be optimum version of HP-UX to run on them ?
I finally managed to pick up a logic analyser for a price I could justify.
It is a HP1630G and it comes with a number of pods. However the pods do not
seem to have the actual wires/probes. Is there a separate part number for
these that I should look for. There seem to be quite a few items like this:
http://www.ebay.co.uk/itm/291753390848, are these likely to be suitable