> The big issue isn't going to be getting paid, but finding a
> replacement at any price.
At the time of the last e-mail I exchanged with David, he was hoping that a
restoration was possible. He wasn't sure of the exact extent of the damage,
but seemed to think that the power supply, the front panel glass, and the
plexiglass covers had taken the worst of of it. Since the minimum
restoration effort would require one-off fabrication of the covers and panel
glass, this would not be cheap. The process that Bob Armstrong used for
the SBC6120 front panel would produce a very nice replacement, though it be
plastic. Doing the work as an insurance settlement would probably require
that it be contracted to a professional who could provide a quotation.
Honestly, I have no knowledge of anyone who works professionally on stuff
quite this old! There are apparently a few caches of flip-chips from that
era around, though getting a collector to part with some spares could be
expensive as well. In any case, that was David's thinking moreso than
reaching a cash-for-scrap settlement.
--Bill
JC,
I've got 'em if you haven't already gotten them from someone else. Let me
know.
Best,
Patrick
-----Original Message-----
From: cctalk-bounces(a)classiccmp.org
[mailto:cctalk-bounces@classiccmp.org]On Behalf Of J.C. Wren
Sent: Sunday, January 25, 2004 7:52 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Otrona Attache Schematics
Does anyone have scans of the schematics for the Attache,
particularly as it relates to the keyboard? I know I paper schematics
in my warehouse, somewhere, but I can't seem to turn them up.
--jc
>Bwahahaha, I've written 10 replies, but canceled them all, because I can't
>teach a house
>plant calculus. You Win.
>
On the other hand, I do keep tring to teach some of my outdoor plants geometery...
Seriously the TOTAL lack of regulation on "WallWarts" is quite common. I am currently (preofessionally) developing a product which normally operates off of AC power (via a wallwart), but needs to remort low AC conditions and fall back to battery.
The load on this device is VERY dynamic ranging from under 10mA to over 850mA depending on what it is doing. The voltage fluctuations out of the wall wart (which is rated as 11.8V @ 1A) will rise as high as 17V when under a minimal load.
Since the device is intended to have a very low production cost, they really cut some regulation requirements on the board as well, since the components WILL tolerate this range of voltages.
Unfortunately, the side effect is that the voltage variation based on load is significantly greater than the voltage variation based on fluctuations in the AC (eg during a brown out). This has required the development of software that is constantly monitoriing the "active" state of many of the devices to "calculate" the current load, and then going through a transform to estimate the RAW AC that is providing power to the wart.
DAvid.
On Jan 25, 21:15, Lyos Norezel wrote:
> Doc... this is a BAD idea... I've fried numerous devices by using the
wrong power rating... even if it was only 1mA off. The voltage almost
never matters... as long as the power is correct. Hope this gets to u
before you fry your machine.
> Lyos Gemini Norezel
That's exactly WRONG! It's the voltage (and polarity) that matters,
and the power (or current) doesn't, so long as it's "enough".
What may sometimes be confusing is that the voltage produced by small
power supplies often drops dramatically under load, and that's probably
all that's saved our friend above from some disasters.
> Doc Shipley <doc(a)mdrconsult.com> wrote:
>
> Funny coincidence, there. I just hacked a Sprint CAD-1000 AC adapter
> onto a JetDirect Ex+ last night. The receptacle of the JD is odd, so
I
> had to pull the board and solder the adapter direct. Other than that,
> it's the right voltage, and a little over-amped (1A vs the JD's rated
> 800mA).
--
Pete Peter Turnbull
Network Manager
University of York
On Jan 25, 18:56, David V. Corbin wrote:
> Actually that (I am pretty sure) is a version that focuses mainly on
the
> PDP-8/a which was microprocessor (rather than discrete component)
based.
>
> Earlier editions (which had more information on Flip-Chip based
designs),are
> much more useful to those intersted in older PDP-8's (/I /E /L /M
/S).
Nope, I have a copy of that handbook, and it is definitely the one for
the PDP-8/E (and 8/F and 8/M), not the 8/A (which followed). And as
has already been pointed out, those machines are all TTL. It was the
VT/780 and DECmates that used microprocessors.
--
Pete Peter Turnbull
Network Manager
University of York
On Sun, 25 Jan 2004 "Antonio Carlini" <arcarlini(a)iee.org> wrote:
[...]
> If you still see no activity, perhaps there is something that sends
> the RSTS system off to the wrong place (after all, it said that the
> incoming area 60 connection was from area 1). Maybe RSTS does not
> implement the area stuff properly (any chance it might be Phase III?)
> If you can persuade your hub/switch to monitor traffic connected
> to the RSTS box, see if you can do an ethereal trace and decode
> the AA-00-04-00 address the RSTS box sends traffic to.
Badabing!
I just remembered something. Zane, what version of RSTS/E are you running?
RSTS/E DECnet was phase III until rather recently. That means some
limitations... Phase III only have one area, and can only address node
numbers < 256 on that area.
This could *also* be the problem.
Johnny
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt(a)update.uu.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
On Sun, 25 Jan 2004 "Zane H. Healy" <healyzh(a)aracnet.com> wrote:
> >I have gotten a lot of DECnet-IV systems talking to DECnet-Plus. What you'll
> >need to do is register the DECnet-IV systems and then flush the naming cache.
>
> I've done this with RSX-11M and VAX/VMS without any problem, it's DECnet/E that seems to be the problem. I don't know if I've failed to set something up correctly on the RSTS/E side, or what.
>
> >After that, you should be able to connect to the Phase-IV system.
>
> Directory Service: Local name file
>
> Node name: LOCAL:.rstse
> Phase IV synonym: RSTSE
>
> Address tower protocol and selector values:
> Session: DNA_SessionControlV2 (SC2)
> 00 13
> Transport: DNA_NSP (NSP)
> (no selector value)
> Routing: DNA_OSInetwork (CLNS)
> 49::00-3C:AA-00-04-00-97-F2:20 (60.663)
>
>
> Number of nodes reported on: 1
>
> $ set host rstse
> %SYSTEM-F-NOSUCHOBJ, network object is unknown at remote node
> $
>
> On the RSTS/E system console, I get the following:
>
> Event type 34.1, Object spawn failure
> Occurred 10-Jan-17 17:40:49.5 on node 60.663 (RSTSE)
> Reason: Unknown Object identification
> Source node = 1.652
> Source process = 0 0 0 HEALYZH
> Destination Process = 42
>
> There are a couple of odd things about this error, one is that "SHOW
> DATE" on the RSTS/E system shows 24-JAN-04 05:40 PM, so it looks like
> DECnet/E has a Y2k problem. The other is that the source node is
> 60.652, not 1.652 like the error message states.
>
> The Y2k error shouldn't be a problem, as my RSX-11M system works with
> the wrong date.
>
> On a positive note, I finally got things setup so I can connect to the
> RSTS/E system via LAT from the VMS system :^)
A few things that might help: Please tell the results of the following on
the RSTS/E system.
> SHOW KNOWN OBJECTS
> SHOW EXEC CHARA
(That's in NCP on atleast RSX and VMS phase IV)
Johnny
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt(a)update.uu.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
Recently I had a flood in a storage room and a number of computer books
unfortunately got soaked. They are drying, but as some of them are
starting to grow rather colorfull fungi, and I've been told they have to
go. In the interests of maintaining domestic tranquility, the following
material is available to whoever wants to pay me to ship it to your address
(they will be dry when shipped):
PDP-8/L handbook
Laboratory computer handbook (on programming the PDP-12)
Complete copy of Inside MacIntosh manuals.
Megamax C manual for MacIntosh (I don't know where the disks are)
Byte Magazines from 1988 and thereabouts (when Byte was worth reading).
If anyone is interested, contact me off list at:
borisg at unixg dot ubc dot ca and use the string "Aaardvark" in the
subject line to get past my spam filter.
These materials are going into the garbage in 4 weeks if there is no interest.
Boris Gimbarzevsky
