Hi
Someone at one of the earlier VCF's had one that controlled
stuff in a doll house. Maybe someone can remember who
that was??
Dwight
>From: "Joe R." <rigdonj at cfl.rr.com>
>
>Mike Haas has one of these. He may have the manuals too.
>
> Joe
>
>
>At 02:50 PM 4/24/05 -0400, you wrote:
>>Every so often I put this up in various places..
>>
>>I'm looking for schematics and otehr useful info on:
>>
>> IMSAI IMP-48
>>
>>Thats a single board computer that IMSAI did using the Intel
>>8048 family chips. On board items are keypad and LED display
>>to interact with a monitor program in Eprom. Also is 1k of
>>user program ram for applications, ofcourse the 8035 romess
>>8048 plus IO interfaces that include casette tape, relays
>>and TTY.
>>
>>I've had this one for 25+ years and have not seen any others.
>>The one I have is working, it's traced it out and use it
>>for occasional 8048 projects.
>>
>>
>>Allison
>>
>>
>
>
> To make things even stranger, when I booted up a System 6 floppy, I
> got colour once it was running the GUI, BUT, it was a bit distorted
> and not the most readable.
That's what you'll get with Apple II composite in most of the color
graphics modes. In the IIgs they chose compatibility with the II
position/color encoding on the composite output over readability.
There are a few dozen people on the list that can exaplain Apple II
graphics better than I, but to make a long story short, it's a
brilliant bit of engineering when you have a limited components budget
and limited memory, but compatibility is a bit confining.
Run a decent Apple II emulator and you'll probably see the same
"distorted" image.
If you want better, you'll need to use the RGB output or stick with
the monochrome modes. Even if you convert the RGB into composite it
might be a win over the built in composite.
Eric
Bob and others:
Al has scanned some HP-2116 manuals. I'm seeking the volume 2 manual for
the HP-2116A. Al scanned the B manual, but the core stacks are different
so other components are different as well.
Does anyone have a copy of the HP-2116A volume 2 manual?
Please? ;-)
Many thanx to Al for the manuals that he put up!
http://bitsavers.org/pdf/hp/2116/
I keep putting up more pics as I make progress:
http://rikers.org/gallery/hardware
--
Tim Riker - http://rikers.org/ - TimR at Debian.org
Linux Technologist
BZFlag maintainer - http://BZFlag.org/ - for fun!
I also have:
AIX V4.3.3 documentation (about 4 yrs OT, but it *does* run on classic
RS/6ks), includes doc CDs and several manuals.
SCO XENIX 386 release 2.2AT ("for Compaq Deskpro 386 and compatibles"). Don't
have any machines that this will run on, but the disks are readable
(checked in a Linux box). Includes docs.
Activation key written on first disk.
above is FREE, as was the earlier SGIs and HP 9000/H50
[OT alert . . .]
I also have a Tek 555 scope that I don't have probes for and is just too big
for convienient use. ex-Boeing, one DT and one single trace plugin and service
docs. If someone has a smaller scope that they would be interested in trading
. . .
- Scott Quinn
Hi Marvin
They didn't have the intel part but did have a spec
sheet from Siemens on a SAB 8286/87. It seems that yes,
the i8287 is the part that will work on the board I've
been trying to get work. The current rate is a little
lower 32ma instead of 48ma but I doubt that will have
any effect on the SYM-1's bus.
The 8308 is configured differently on the enables.
It has separate receive and transmit enables. I needed
the T/R pin with the single Disable pin. This seems to match
the i8287 that I just located at Halted :)
The Am8303 you sent me matches the schematic I have for
the DP8303. The sheet for the SAB 8287 has the same
functions as the DP8303.
I think my search has endded. It would be great to have
a cross reference of these old chips.
Dwight
>From: "Marvin Johnston" <marvin at rain.org>
>
>Just out of curiousity, wouldn't you really prefer the PDF datasheet for
>the DP8303? It appears to be the same as an AM8308 (AMD) (Octal
>Three-State Bidirectional Bus Transceivers) and I am guessing that the
>suffix is "J". I couldn't find any info on the i8287 or uPD71087. At any
>rate, check your email :).
>
>> In may searches for a DP8303, I have found nothing.
>> I did find with the help of those in this group that
>> the 8304 was the same except non-inverted. Looking
>> for this part, I found that several places list
>> a 8286 as being the same. This is also refered to
>> as a uPD71086. While looking at the Jameco catalog,
>> I found the next list stated as an inverting buffer
>> with the number 8287. I believe this may be the same
>> as the 8303 that I've been looking for.
>> Can anyone tell me what the pinout is for either
>> a i8287 or a uPD71087 ??
>> Thanks
>> Dwight
>
I just received this and thought the list might be interested
ARRLSB - The Official ARRL Santa Barbara Section Mailing List
--------------------------------------------------------------------------
SPECIAL EVENT (Enigma Machine To Be Reactivated After 60 Years)......
In September 1939, the radio receivers of all radio amateurs were
ordered
to be confiscated, but many amateurs volunteered to become "Voluntary
Interceptors" (V.I.'s) in their own homes. These V.I.'s intercepted
encrypted Enigma messages transmitted in Morse Code which were passed
to the code breakers at Bletchley Park. Accuracy was crucial in order
to assist decoding of the message, but many of the intercepted signals
were weak or fading and atmospheric conditions were often poor with QRM
>from loud local stations. Searching through the bands was very
painstaking,
but it was a task that was carried out with great skill and dedication,
providing a most valuable service to the Allies. As a tribute to the
work
of the V.I.'s sixty years ago, the Scarborough Special Events Group
(SSEG)
will be on the air as GB2HQ from GCHQ Scarborough over the weekend of
May 7-8th. A souvenir QSL card showing an Enigma cipher machine and an
HRO receiver will be issued to commemorate the occasion. GCHQ have
provided
a working Enigma machine for use by the SSEG and Ofcom and have given
permission for transmission of an enciphered Enigma message to be sent
in Morse Code on the amateur radio bands for this event only. The group
will be active on SSB, PSK and CW. The CW station will operate around
7015 or 3515 KHz and the Enigma message will be transmitted in Morse
Code at 1100z on Saturday, May 7th, at a speed of 15 wpm. The message
will consist of a few five letter groups which will be repeated at 1300
and 1900z. GCHQ invites all licenced amateurs and listeners to submit a
copy of this Enigma message and will award a certificate for a 100%
accurate intercept. A copy of this message should be sent via club call
G0OOO (Scarborough Special Events Group, 9 Green Island, Irton,
Scarborough
YO12 4RN) and can be enclosed with a QSL card. The cost of the
certificate
is =C2=A33.00 sterling, 5 Euro's, 5 USD, or 6 IRCs. (UK cheques should
be made out to "SSEG"). All profits will be donated to GCHQ Scarborough
Charities Fund. Full details will be published on their Web site at:
http://www.sseg.co.uk
For more information about the Enigma machine, visit the following
Web pages:
http://www.codesandciphers.org.uk/enigma/http://www.enigmahistory.org/enigma.html
_______________________________________________
ARRL Santa Barbara Section List Mailer
On Feb 5, 2005, at 12:20 PM, Tom Uban wrote:
> Hello,
>
> Lyle sent me the pics and I've put them on my site here:
>
> http://www.ubanproductions.com/MVC-001S.JPG
> http://www.ubanproductions.com/MVC-002S.JPG
> http://www.ubanproductions.com/MVC-004S.JPG
> http://www.ubanproductions.com/MVC-006S.JPG
> http://www.ubanproductions.com/MVC-009S.JPG
> http://www.ubanproductions.com/MVC-020S.JPG
>
> Hopefully someone will rescue this machine...
>
> Disclaimer: Not mine, no connection, etc.
>
> --tom
>
>
> At 11:30 PM 2/4/2005 -0800, Lyle Bickley wrote:
>
>> Second try without attached picture. Apparently the 100K JPEG
>> picture I
>> attached in my original email to the list was "too much" for the list
>> server
>> to handle.
>>
>> A very clean dual rack DG Eclipse MV/4000 is available in the SF Bay
>> Area.
>> [Removed - I've attached a picture] - and have several others with
>> more
>> detail which I'll be glad to email off-list to anyone interested.
>>
>> I've inspected the the Eclipse and it looks complete - with all
>> cables, keys,
>> etc. My guess is that its weight is close to 1000lbs(?).
>>
>> If you're interested in the critter, let me know and I'll email you
>> the
>> contact information.
>>
>> I do not have any relationship to the vendor other than as a
>> customer. I just
>> don't like to see beasties like this dismantled for parts or sold for
>> scrap...
>>
>> Lyle
>> --
>> Lyle Bickley
>> Bickley Consulting West Inc.
>> http://bickleywest.com
>> "Black holes are where God is dividing by zero"
>>
Just an FYI and an update...
I'm in the final arrangements to purchase this machine... all that is
left is to arrange the shipping. Fortunately, I'm local to the place
that has it, so I'm paying them to deliver it to my house (it's
reasonable enough that my renting a truck and moving it myself would
cost more).
For now, it's probably going in my garage, where I can inspect, clean
and test the parts. As each piece is tested, I'll move it into my home
office (after I make room) and continue from there. I guess everyone
needs a restoration project to occupy their free time? :)
I don't know the status of the disks, so I'm not even sure if it has an
OS on it... if anyone has any pointers to an Eclipse RDOS or AOS/VS
boot tape, I'd love to be put in touch with them!
Thanks.
Mark Davidson
medavidson at mac.com
OOPS, typos strick ): again. The AM8308 should have been AM8303.
> Just out of curiousity, wouldn't you really prefer the PDF datasheet for
> the DP8303? It appears to be the same as an AM8308 (AMD) (Octal
>From: "Allison" <ajp166 at bellatlantic.net>
>
>>
>>Subject: Re: small valves
>> From: "Dwight K. Elvey" <dwight.elvey at amd.com>
>> Date: Mon, 25 Apr 2005 09:57:08 -0700 (PDT)
>> To: cctalk at classiccmp.org
>>Hi Stan
>> I've done similar. I've taken one of those small 100W
>>inverters and rewound the transformer on it to provide
>>all the voltages for my older battery powered Atwater
>>set. It just runs from a 12 volt gel cell. I tapped
>>of the primary to provide the filament voltage and
>>used the secondary with tape to provide the rest.
>>As I recall, there was one -C and two +B voltages.
>>I used no regulation, just used the right rinding
>>ratios. One has to remember, these old radios
>>were made to run form carbon-zinc cell in most cases.
>>I did put a pot on my C cell. The original was -4.5v
>>but I found that it works better, with less distortion,
>>when set at about -3.5v.
>>Dwight
>
>Good approach. I enjoy building and winding my own cores
>be they EI iron or powered iron/ferrite types is part of
>that. Switching mode PS design is an art in itself. Part
>of the fun is building for good efficientcy and for powering
>tube designs that means knowing the load.
>
>An aside is don't run regens off inverter or switching supplies
>as the gain is high enough to negate reasonable shielding
>and bypassing. For that I find common alkaline 9V batteries
>in series do well for the typical 27-90v range and exhibit
>good life.
True but expensive. I do this on my Radiola II.
Dwight
Just out of curiousity, wouldn't you really prefer the PDF datasheet for
the DP8303? It appears to be the same as an AM8308 (AMD) (Octal
Three-State Bidirectional Bus Transceivers) and I am guessing that the
suffix is "J". I couldn't find any info on the i8287 or uPD71087. At any
rate, check your email :).
> In may searches for a DP8303, I have found nothing.
> I did find with the help of those in this group that
> the 8304 was the same except non-inverted. Looking
> for this part, I found that several places list
> a 8286 as being the same. This is also refered to
> as a uPD71086. While looking at the Jameco catalog,
> I found the next list stated as an inverting buffer
> with the number 8287. I believe this may be the same
> as the 8303 that I've been looking for.
> Can anyone tell me what the pinout is for either
> a i8287 or a uPD71087 ??
> Thanks
> Dwight
