At 04:22 PM 7/10/2025, you wrote:
>Lee Felsenstein at VCF West Friday, August 1 at 4:30PM.
>He will talk about the 50th Anniversary of The Homebrew Computer Club.
Here's the line-up:
https://vcfed.org/events/vintage-computer-festival-west/vcf-west-speakers/v…
Not just Lee... but also Bob Marsh of Processor Tech, and Harry Garland of Cromenco,
and Dan Sokol of Apple...
And then for the Amiga 40th events, Dale, RJ, Trevor, Perry, Willie, Marco,
Bill, Aaron, Brad, and me, too!
And Sellam is there!
- John
Hey all,
I'm trying to track down a manual or instructions for the Message Center
program on the Interact One (from 1978).
I've run this in the MAME emulator, and it seems the program has a
"partial" BASIC-like interpreter. You can do line numbers, like
10 HELLO
20 WORLD
Then issue the command SCROLL, and it will start scrolling text in the
numeric sequence they were specified. Then you can also do commands like
FLASH, BUZZ, BEEP in its equivalent of "immediate mode" -but I don't know
yet how to specify these commands in the numeric program. And in the
emulator, I can't yet parse the commands PLOT, SOUND, SIZE - these "message
center" program specific commands,not BASIC (BASIC on this system is
loaded from tape).
Anyway, a manual on a program for the Interact One called "Message Center"
is what I'm trying to track down.
Thanks,
Steve
Hello All,
A long time ago I acquired a System/23 desktop unit and eventually a number
of the tower units including the HDD tower unit. The plan was to setup a
System/23 Muli-User system with multiple terminals connected together. Well,
like many great plans real life got in the way and the units have been
sitting in storage for a few years. I have accepted that this is one of the
projects I will never get to and it is time to pass them on to someone else
who can enjoy them. The systems are in SoCal (Upland, CA to be more exact).
More info can be found at the following links:
https://forum.vcfed.org/index.php?threads/ibm-system-23-datamaster-5324-towe
r-model-of-the-5322-with-original-clicky-keyboard.1253651/
https://forum.vcfed.org/index.php?threads/ibm-system-23-datamaster-5324-towe
r-model-of-the-5322-with-one-floppy-drive.1253652/
https://forum.vcfed.org/index.php?threads/ibm-system-23-datamaster-5322-or-5
324-hdd-tower-model-5247.1253653/
I hate to part/scrap them as the towers rarely show up so I am hoping
someone local would be interested in them. Feel free to email me directly or
reach out through VCF. Thanks
-Ali
I did some digging and found one 3000-400 with no lid( It could be here
somewhere) and I'll have to move it to look it over to see what's there.
I had 6 or so 3000s and I guess I sold them, but more digging to do.
MV3100 M76
MV3100s I can't get to the model number
4000-60
5000-25
5000-125
5000-133
5000-200
I had to pull some boards and made a small list.
M7621
M7622
M7624
M7625
M7626
54-21149 KN15
If you need a board I have not listed, please email me off list. If I
haven't replied, bug me.
I did not list qtys- some items are more than one.
Thanks, Paul
As many of you know I have been trying to finish organizing my Unibus parts
and finish building several systems for years. Other than time and my
health I don't have enough space. I would like to sell, at reasonable
prices, all of my q-bus parts which include 400 - 500 boards, about a dozen
boxes, and a lot of spare parts. I have BA11-M, BA11-N, BA11-S and a few
BA23 boxes left.
If you have an original 11/03, I have a dozen or so H780 power supplies,
which are very hard to find. They are also used in the Vax 11/780 front
end, the
RKV11-D and possibly a few other items. I can test them if I have time, but
that might take awhile.
I'm also taking offers on some of my 8-E and all of my 8-A items. I will
entertain offers on the VT14 and all of the PDP 14 industrial controller
parts.
I have a few Vax 3000, 5000, and a few others along with parts including
memory.
Those of you who have been here know I have a ton of DEC and
DEC-compatible parts, but no one has seen everything. I have brand new
disk heads, tape drive heads, alignment packs, and literally tons more. I
went through over 50 backplanes a few weeks ago looking for a few specific
ones.
Some Unibus items are also going. Probable some 11/05s, 11/34s, 11/83
and/or 84s and a lot of options and boards.
So if you need or are thinking about DEC items, feel free to send me a wish
list off list.
I prefer phone calls and will send my number upon request. I was never
great at typing and I'm getting worse.
Oh- I also trade for US and foreign coins and currency.
Thank, Paul
Ah, thank you Paul, for sharing this story. Postings like this make cctalk worth every penny, IMO!
Regards,
Freek.
-----Original Message-----
Date: Tue, 08 Jul 2025 21:30:36 -0000
From: paul.kimpel(a)digm.com
Subject: [cctalk] Burroughs backplane story, was Re: Another 780
backplane story
To: cctalk(a)classiccmp.org
Message-ID: <175201023609.1228.2550589532797629102(a)classiccmp.org>
Content-Type: text/plain; charset="utf-8"
In early 1971, I started working as an on-site software tech on a rather large (for the time), dual-processor Burroughs B6500. It was early days for that system, and we had a lot of problems with it in the field. We got those ironed out pretty well and eventually got the system up to an acceptable level of operation.
<<< snip>>>
We finally deduced that the problem had been present since the system left the factory floor. The original I/O software had been so poor that the system was seldom (if ever) able to initiate more than one I/O to disk at a time, but the new version we had recently installed was really good at initiating multiple I/Os. Mux 1 had a lower selection priority than Mux 0, so under the old software it was seldom selected, and perhaps never so for tag transfer I/Os, which are relatively rare. The new software allowed the system to get busy enough that Mux 1 started to be used a lot more often, and eventually it got busy enough that a paging I/O for that master PCW array got scheduled to Mux 1, and the system just didn't survive for very long after that.
