Can you take a picture of the side you have ? I have a few
On Dec 1, 2016 11:27 AM, "Josh Dersch" <derschjo at gmail.com> wrote:
Hey all --
Due to a small miracle I now have 8KW of perfectly functioning core in my
long-ill Imlac PDS-1D. The last hurdle is devising a replacement for the
missing display (an X/Y vector display). For the time being I'm going to
attempt to use an oscilloscope, but first I need to build a cable.
The Imlac uses a Winchester connector (14 position) for the display and
while they're not as common these days the parts can still be found so I
thought I was in the clear, but what I failed to notice is that three of
the "pins" (for the X, Y and Blank signals) are actually tiny coaxial
connectors that fit within the Winchester housing (i.e. they're the same
diameter as a Winchester pin).
I haven't been able to track these connectors down anywhere. Anyone have
any ideas?
Failing that, I can always just tap into the backplane to pick up these
signals and ignore the connector on the bulkhead, but it would be nice to
be able to use the original connector...
- Josh
I just started cataloging and dumping firmware my SASI/SCSI disk and tape boards
starting with Xebec. It would be nice to find images for the two alternate fw
proms for the S1410A, particularly the 8k 104793 version so I can compare it to
the one used on the S1420
Hi,
I just acquired a Philips P2000C and I'm looking for a copy of the p-systems
disc(s) to run UCSD Pascal on it.
If someone has a copy of those I would be very happy ;)
-Rik
I acquired a working HP Draftmaster RX (HP part # 7596B).
An awesome machine, 36" roll feed and 8 pens, complete with several pen
carousels, user manual, and hundreds of working pens.
I was very excited to make a splash in the art world with this thing. I did
get it to perfectly draw a 3 color demo page from the front panel.
Thereafter it started displaying errors on the display such as "200" which
means it needs "mechanical calibration".
Thanks to hpmuseum.net I acquired the service manual
<http://www.hpmuseum.net/document.php?hwfile=1292>, which catalogs many
calibrations and self-tests to run from the front panel, including the
aforementioned "mechanical calibration".
So I power up with the appropriate front panel keys depressed to run this
calibration. The paper drive motor starts making noise, but the paper
rollers aren't turning, and the LCD display is blank.
Since that moment, the LCD display is always blank so it is currently a
boat anchor.
It's a terribly sad state of affairs. I have basic electronics and
mechanical skills and an oscilloscope so following the troubleshooting
procedures in the manual I might be able to identify a part to replace. But
of course, parts for sale online are are rare, expensive, used and probably
untested.
Probably better would be lower-level repair of whatever parts are faulty
but that's probably more than I can manage at my skill level.
I'm in Seattle, WA. Is there anyone alive in the pacific NW who will pay a
visit and help me fix this thing? (The only company I found that admits to
working on pen plotters is 360tech in Austin, TX.)
Or someone elsewhere I could ship electronics parts to for test and repair?
Or provide guidance, or help in any form at all?
thanks
M.
Does anyone have a manual for the Microtec META29M meta-assembler? This
was generally used to assemble microcode for microprogrammed systems,
including bit-slice systems. It was apparently compatible with AMD's
AMDASM, but added additional features.
Argument goes both ways. Does anyone really do practical things with any home computer??
On the vcf forums I enjoyed two folks who eventually got their two PDP models running chess and had them play eachother. ?I'd like to see a rematch or maybe some new vintage competitors approach :-)
If they can run holiday lights they could also probably use it for x10? home automation if one considers that practical.
-------- Original message --------From: Brad H <vintagecomputer at bettercomputing.net>So I wondered what PDP guys did to keep interestedand how much they actually used the machine over the course of, say, a year.
Sent from my Samsung device
-------- Original message --------
From: "Ian S. King" <isking at uw.edu>
Date: 2016-11-29 7:19 PM (GMT-08:00)
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
Subject: Re: Thinking about acquiring PDP stuff
On Tue, Nov 29, 2016 at 5:17 PM, Brad H <vintagecomputer at bettercomputing.net
> wrote:
>
>
> That sounds interesting.? I imagine they'd be worth even more than an 8/E?
>
>
> Keep in mind that the 8/I is a fairly substantial investment in space and
weight.? Also, if you want to add something, it's not as easy as plugging a
card into a backplane.? The 8/I requires wirewrap work.
--
Ian S. King, MSIS, MSCS, Ph.D. Candidate
The Information School <http://ischool.uw.edu>
Dissertation: "Why the Conversation Mattered: Constructing a Sociotechnical
Narrative Through a Design Lens
Archivist, Voices From the Rwanda Tribunal <http://tribunalvoices.org>
Value Sensitive Design Research Lab <http://vsdesign.org>
University of Washington
>There is an old Vulcan saying: "Only Nixon >could go to China."
I'm curious.. what do people do with these things? ?I've seen videos of some in large racks being used to play music, etc. ?The rack ones seem like a a pretty substantial investment in space for something that doesnt (or does it?) have much practical use today.
> From: Peter Coghlan
> Can anyone suggest an existing, simple QBUS device that I could study
> the documentation of to figure out what a basic QBUS device needs to
> have and to give me some ideas on how to implement one?
Depends. Do you want to be able to do interrupts? Do you want to be able to
do DMA? Each is a significant increment in complexity.
Later DEC QBUS devices may not be the best things to look at, since they tend
to use special DEC QBUS control chips (I'm _not_ talking about bus
transceiver chips here) which are of course no longer available.
If all you want is master/slave (i.e. the ability to read/write registers),
try this:
http://ana-3.lcs.mit.edu/~jnc/tech/QSIC/test.pdf
It implements a single 16-bit register. (Changing it to support a single
block of registers would of course be trivial.)
The switches (and associated comparators) in the lower left allow one to set
the bus address it responds to; the 3 latches on the right hold the register
contents; the drivers/buffers below them drive LEDs to display the register
contents. The control logic is about as simple as it can be; one latch, and a
couple of gates.
You should probably read the QBUS description in any QBUS PDP-11 manual
before attempting to understand it, but having done that, it should be pretty
self-explanatory - the signal names should clue you in to what they mean.
> From: Glen Slick
> I have an M9405-PA. It has one male and one female 3-row 50-pin
> D-shell connector.
That's on the metal plate, right? The board itself should have a 2x25
Berg header.
Noel
> From: Brad H
> I was thinking about trying to acquire something early 70s...
Anything DEC early 70's is going to be fairly expensive, alas. Only once one
gets to QBUS -11's does the price come down.
> if it is feasible to buy in pieces .. but is dependent on parts
> availability
I would not recommend this route. Those machines are a lot of bits and
pieces, and if you buy a few, unless you're incredibly lucky, it will take
forever for the rest of them to show up. There will be a few things that just
never show. (Even when buying a 'complete' system, one will often find that
it has been robbed of a few critical components, probably cannabilized to
keep another machine running BITD.)
There might be a rare exception (I see the guys in Mahwah selling a PDP-8
chassis, and also a front panel with switches, and it _might_ be possible to
round up all the boards - but that's more like the exception than the rule.)
Noel
Did you end up trying anything yet? Isn't there some requirement for a working battery for it to power on or was that just the power routing through the battery so a corroded one isn't a simple run without it fix?
-------- Original message --------From: Chris Pye <pye at mactec.com.au> Date: 11/26/16 12:26 AM (GMT-06:00) To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Macintosh Portable
Does anyone know off hand what polarity that Mac Portable requires? I know that the original was 7.5V @ 1.5A, but not sure of the polarity.
