>I have been looking for a Heathkit 3400 Microprocessor trainer for *years*
>and there was one there -- 6808 uP (6800 w/internal timer, same instruction
>set), 512 bytes RAM (a pair of 2114's - amazingly, they still work), 1K
>ROM, and (6) 7-segment LED's for primary program output...
I have three (well, two working, one for spares), and they are nice litle
units. One has the 2114 RAM, and another has the 2112. Also different
processors (6800 vs. 6808).
>I also got Heathkit digital trainer (3100, methinks ?)
That's a nice unit as well. Basic, but provides a lot of the "standard"
functionality you need when working w/ TTL.
*Whoof* MUCH less than I paid!
>Anywho, I (unforch) didn't get any dox with the trainer
I have a hardcopy of the 3100 manual I could photocopy for you, and I have
the entire 3400 manual (except schematics) scanned in the PaperPort format
(Windows viewer available, don't know about other platforms). I could send
you a CD with the files, or I could print a copy and send it along... No
charge either way...
email me off-list, and we can work out the details (mailing address, etc.)
Did you say free? I live in Cupertino and would be willing to take it off
your hands! (I got this from my friend Cameron Kaiser, in case you were
curious how I came across this. He is a big comedore nut. :) )
Lighthouse Business Partners.
If anyone wants a working HP 9000/350 & color monitor, please let
me know. It runs HP-UX 8.0 (IIRC), and X-Windows.
It's in Cupertino, CA, and time is of the essence.
(I'd prefer to keep back the HP-IB disk drive, or swap it for a
somewhat similar HP disk drive, if possible.)
Hi Iggy Drougge, you wrote on 4/29/01 3:56:00 PM:
>Jeffrey S. Sharp skrev:
>Quoting Iggy Drougge <optimus(a)canit.se>:
>> But of course I turn the programs off before flicking the switch!
>Well, you see, there is/are some program(s), called the "operating
>system", that you aren't turning off. You turn it off by running
>the shutdown procedure.
>Why would I turn off the OS? It's just running there and has no business
So, how do you get to "your disks" without going through the OS?
On 2001-05-01 classiccmp(a)classiccmp.org said:
>On Wed, 25 April 2001, John Keys wrote:
>> Picked the issue at the news stand today that had the 2 page
>>article on classic computers staring our own Sellam Ismail. It
>>was fun reading and now I have to see this former car plant that
>>serves as your warehouse. I have to get me rich uncle so that I
>>can get that kind of space. Articles like this are great for our
>>collecting efforts as more and more people learn about they seek
>>us out to donate their old computers. Keep up the good work.
Is it possible to put a scan of this article online somewhere?
This magazine isn't available over here...
Kees Stravers - Geldrop, The Netherlands - kees.stravers(a)iae.nl
http://www.iae.nl/users/pb0aia/ My home page (old computers,music,photography)
http://www.vaxarchive.org/ Info on old DEC VAX computers
(Mirrors: http://vaxarchive.khubla.com/ and http://vaxarchive.sevensages.org/)
Net-Tamer V 1.08.1 - Registered
In case anyone's interested in seeing a few scanned-in images from a
book created on a classic PERQ graphics workstation, I've made them
Computers used: PERQ T2 and PERQ-1A
OS: POS (PERQ operating system)
typesetting: IDOCS Mint document formatting software from Igloo software
which generated an XPress format output file
graphics: Paint from Advent Imaging, Ltd. and Picasso from Prolog Software
printing: Capri, the PERQ interface to a Canon LBP-Cx
Printer: Canon LBP-Cx, engine driven directly by the PERQ
Copyright (C) 2001 R. D. Davis The difference between humans & other animals:
All Rights Reserved an unnatural belief that we're above Nature &
rdd(a)perqlogic.com 410-744-4900 her other creatures, using dogma to justify such
http://www.perqlogic.com/rdd beliefs and to justify much human cruelty.
I was searching for PDP11 stuff in an idle moment and came on the DX11-B thread. We still use them in my company (probably a PR faux pas to tell you what we do!) for 370 channel to PDP transfer. I have access to complete print sets and most of the knowledge you need if anyone has a specific question, or just wants to know what the hell it does. I may be able to provide a bit of input for DZS11, DRS11 and DR11, PDP11/45, 34 and 34A as well, if you ask the right (i.e. easy) questions!
Before anyone gets too excited about the 10(!) DX11-B's that we still have, we will be using them for a couple of years yet! :-)
On Wed, 25 April 2001, John Keys wrote:
> Picked the issue at the news stand today that had the 2 page article
> on classic computers staring our own Sellam Ismail. It was fun
> reading and now I have to see this former car plant that serves as
> your warehouse. I have to get me rich uncle so that I can get that
> kind of space. Articles like this are great for our collecting efforts
> as more and more people learn about they seek us out to donate their
> old computers. Keep up the good work.
The old space is no longer, as I've been moving the collection to a new
warehouse up the street. The old car plant is set to be demolished in a
few weeks. Sad but true.
The good news is the new space is free :)
Sellam Ismail Vintage Computer Festival
International Man of Intrigue and Danger http://www.vintage.org
I have the PCjr Technical reference too and it covers the pinouts
of the expansion bus, but not the 3rd party expansion unit itself.
I have no documentation for that beast.
It sounds like I should buy some soldering/desoldering equipment
and start practicing. The broken pin is in the bottom row of the
connector, so I don't have easy access to remove it in place.
Were you suggesting that I only cut away part of the connector,
leave the rest intact, and then replace the part that I cut away?
That would certainly save a lot of work, since it is 30 pins
across and this pin is second from the outside.
Now the power supply is a trickier problem. The PCjr power
supply has an external transformer, then another stage inside.
The expansion unit looks to have the same setup, except I don't
have the external transformer. Since it has the same connector
as the standard PCjr power supply, I grabbed a spare PCjr power
supply and used it. It's possible that the input voltage is
wrong, thus causing the second stage inside the expansion unit
to do the wrong thing.
So here's the $64000 question - does a Rapport Drive II
expansion chassis use the same power supply as the PCjr? If
not, can anybody tell me what the true power supply behaves
Back to assuming I've got the correct external transformer ...
I checked all of the boards on the expansion chassis, and I
didn't see any burn marks. Does that mean I have no shorts
on the board ? ;-) I know what a short is, especially when
it starts vaporizing wire, but how do I diagnose a short on
something that looks pretty clean and isn't doing anything
I need to find if that pick line is going active - that
might be the key to my problems. I'm really thinking of
putting an external supply on it, just to test to make sure
that it really is the power supply that is acting up. If
the rest of it works, then I can relax and take my sweet
time with the power supply.
(I'm a glutton for punishment. I've got 6 danged PCjrs in
the house, all in some state of disrepair. I'd like a good
working one. Next time I'm going to pay the premium for
one in mint condition.)
PCjr heads - check this out:
My contribution to classic computers ....