Pictures or it didn'didn't happen ;)
-------- Original message --------
From: William Donzelli <wdonzelli at gmail.com>
Date: 6/9/2016 10:39 PM (GMT-05:00)
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
Subject: IBM 3511
So today I picked up something I had never seen before - an IBM 3511.
This is a large tower expansion chassis for the PS/2 line. It looks
very straightforward - but can any of you PS/2 fans comment on this?
Was it an unsuccessful product? Low demand item?
I have got a 9845B which has a defective power supply unit - obviously a very common problem.
After replacing the cracking epoxy capacitors I found that the mains transformer seems to have a broken input winding.
Maybe someone tried to run it at 220V using the 110V input selector switch.
What I am now looking for is a defective PSU with a good transformer, resp. just the transformer which may also have been used in other HP devices..
The transformer is located on the PSU mother board between the two large capacitors.
It has the part number "9100-4037" and the date code "8-81" printed on it. It has two input windings and three output windings. Thus the output is a bit different (one additional winding compared to Tony Duells schematics).
Maybe someone can help?
I have a nice VT52, but it sits on the floor right now... I would
dearly love to track down one of the old roll-around pedestals for it
(as pictured here: http://cdn4.static.ovimg.com/m/04jldl).
Didn't happen to see one in the warehouse by any chance, did you Todd? :-)
So, after finding that a DL11-E wasn't working in the backplane SPC
slots (26-28) on my 11/45, I took a closer look. The problem isn't
exactly what I had expected -- -15V seems to be distributed there, but
+15 is not.
Looking closely at the print sets, the listed configurations only
mention DL11-A, the 20ma current loop model, which wouldn't require +15
to work. I wonder if some +15 distribution wires were added in an ECO,
or maybe EIA console from the backplane SPC slots was never supported
for these early 11/45s (mine is serial 152).
There's one other oddity -- the power distribution table in
EK-11045-MM-007, page 510, implies that +15 should be distributed to the
SPC slots on CA1. I'm wondering if this is a typo, since I'd expect
that pin to be NPG? The DL11-E looks to be expecting +15 on UA1 in any
Long ago there was a thread about FOCAL-65 for the 6502, and I asked
the people involved but it seemed it never came to light.
As it happens I appear to have both the user-manual and a quite thick
photocopied (not great quality) listing of FOCAL-65, that I am happy
to scan and upload somewhere.
However, if this already exists somewhere and can point to it, I can
put this scanning task aside.
Just wanted to drop a line here- despite a shipping misfire, Rod Smallwood's replacement 8/e panel finally arrived yesterday and they look KICK ASS!
I'd love to start building artwork for the 11/40 panel- mine looks pretty sorry at the moment. Does anyone here have scans to get started with and best practices to use?
Sent from Outlook<https://aka.ms/kr63o9> on iOS
I'll be driving around southern and central California in a few weeks. Will be between LA and Yosemite Park.
Does anyone have a garage or other pile of computers that you want thinned-out? I can come-by and take some of it off your hands.
I seem to remember there is an entry point that one can use to reinitialize
BASIC already loaded into core memory, with the intention of re-answering
the questions about MEMORY SIZE, Use SIN?, etc. Is this correct? I looked
in the docs I have b ut I could not find it. If no one has this info I
will have to disassemble, IN a HEX editor I see the questions are all at