All:
While cleaning up old email, I found this post I made in
mid-2004:
> While browsing an early-1980 issue of Compute magazine, I
> saw a blurb for Rockwell offering copies of the manufacturing
> test program for the AIM 65 computer. The blurb references a
> test manual (#EA74-M800) and a test program listing
> (#EA74-J100). It also indicates that on the manufacturing
> line, two EPROMs with the test program are installed in the
> BASIC ROM slots.
>
> Does anyone have either manual or the ROMs in question?
>
> Thanks.
>
> Rich
Since it's been 18 months since that post I thought it worthy to
re-post in case someone has come to possess this ROM and/or manual. Thanks.
Rich
Rich Cini
Collector of classic computers
Build Master for the Altair32 Emulation Project
Web site: <http://highgate.comm.sfu.ca/~rcini/classiccmp/>
http://highgate.comm.sfu.ca/~rcini/classiccmp/
/************************************************************/
I was not able to help these two people, if anyone can, please reply
directly to them:
---------------------------------
I'm wondering if you can help me. I'm looking for a copy of q-dos or
86-dos to complete my collection. Do you have any information on where
I might find one? Thanks for anything you can provide.
Christopher D Holmes
chris at jli.coim
---------------------------------
I am looking for a back issue of Stewart Alsop's PC Letter. I am
looking for volume 7, issue 11 (dated June 2, 1991). Do you have this
newsletter in your archives or do you know of anyone that might have
back issues. Thank you for your time.
Penny Krebs
pdkrebs at aol.com
---------------------------------
Best, David
classiccomputing.com
SIMH, The Computer History Simulation Project, The HP2000 simulation, and the 8102 based Cosmac Elf Restoration provide NASA with valuable lessons learned, impacting the longevity planning which is expected to help insure the success of the mission to Pluto.
As we indulge ourselves with our interest in classic or retro-computing we often find ourselves having to explain to family, friends, or co-workers why we have this interest. From time to time we have an opportunity make a positive impact on current or future technology. I believe this is one such example.
Below is a link for a paper published by NASA, which chronicles the results, pitfalls and lessons learned form the successful resurrection of two computing systems from the 1970s, The Cosmac Elf, and the HP2000.
The lessons learned from these two efforts had a significant impact on the longevity planning efforts for the New Horizons mission to Pluto, scheduled for launch tomorrow, Jan 17, 2006.
http://descanso.jpl.nasa.gov/RCSGSO/Proceedings/Paper/A0053Paper.pdf
As a side note, a Yahoo group has sprung up around the HP2000 simulation. It can be found at the following URL.
http://groups.yahoo.com/group/hp2000family/
The Cosmac Elf Users Group can be found at:
http://homepage.mac.com/ruske/cosmacelf/
The Computer History Simulation Project and SIMH can be found here:
http://simh.trailing-edge.com/
Enjoy,
Mike Gemeny
On 1/15/2006 at 2:20 PM John Foust wrote:
>Last one on eBay went for $60: 8747653996 .
And yet the floppy tape cards, using the same chip, go begging. Go figure.
Cheers,
Chuck
True, but my problem is space, who doesn't :-)
so getting at the rear side to flip the breaker is just as cumbersome
as pulling the plug at the wall.
And I do not want to install the power controller at the front of the rack.
And the EMI filter is indeed always connected, but Murphy ...
- Henk, PA8PDP.
________________________________
Van: cctalk-bounces at classiccmp.org namens Patrick Finnegan
Verzonden: ma 16-01-2006 19:59
Aan: General Discussion: On-Topic and Off-Topic Posts
Onderwerp: Re: AC power on front panels
On Monday 16 January 2006 04:09, Gooijen, Henk wrote:
> > Some of my kit stays plugged in even when it's powered off.
> > This tends to be stuff I'm pretty confident in, like the PDP-11.
>
> I always pull the plugs on my PDP-11s, because the small
> transformer in the power controller is always connected.
You could also just flip off the breaker on the power controller, which
disconnects everything* in the PCU from the mains. Almost everything I keep
plugged in 24x7 (short of light fixtures and one or two unimportant peecees)
is also on a UPS.
* Except for the EMI filter, inlet power cable, plug from the wall, etc. :)
Pat
--
Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
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Does anyone happen to have PDF's (User & Service) for a HP 1631D? I've
enough bandwidth that getting them, or arranging a drop off point isn't
an issue.
thanks,
David
On 1/16/2006 at 7:44 PM Philipp Hachtmann wrote:
>What do you think? Do I have to be careful? I never thought I could
>program my computer to death.
>And such problems aren't mentioned in my programmers' guide and operation
>manuals.
IIRC, it was indeed a problem on the CDC 7600 PPU's. A very tight (e.g.,
UJN 0) loop would cause core to overheat. The 7600 added a duty-cycle
integrator so that repeated accesses to the same location in a short
amount of time would actually slow things down a bit to avoid that
problem. But the 7600 was a very fast machine for its time.
Cheers,
Chuck
> Some of my kit stays plugged in even when it's powered off.
> This tends to be stuff I'm pretty confident in, like the PDP-11.
I always pull the plugs on my PDP-11s, because the small
transformer in the power controller is always connected.
I once heard a story about a transformer that developed
a short-circuit in a winding, and the thing got hot ...
Actually, I don't pull the plugs. In my little museum it
is too much hassle to get to the plugs on the wall behind
the racks. I have six resettable 230VAC/16A. fuses which
I turn off when I am not in the "computer room".
- Henk, PA8PDP.
This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law.
If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited.
If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message.
Thank you for your cooperation.
Hi folks,
when browsing the google news archive I found several references to "halt and catch fire"
instructions on core memory based computers. The Honeywell minicomputers are also mentioned.
The assumption is: If the processor gets into an indirect accessing loop on the same memory
location (infinite) it will overheat the core and destroy it.
What do you think? Do I have to be careful? I never thought I could program my computer to death.
And such problems aren't mentioned in my programmers' guide and operation manuals.
Btw all my core memory is ok...
What's your opinion?
Regards,
Philipp
