I have a later TI 990/12 system with a dead power supply. Looking drawings or schematics andI believe there in the hardware reference manual.? The one manual on bitsavers? under 990/10shows a older type of power supply.? Mine is basically? all on 1 board.? The chassis is a 990 A13
Thanks, Jerry
Fabri-tek was a common supplier for core memory. Many companies used their memories. Fabri-tek Instruments became Nicolet Instruments in 1971.
I'm not sure one could tell what machine it was used for. It was a common memory system. They did make a lot of memories for military use.
Dwight
________________________________
From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Bob Smith via cctalk <cctalk at classiccmp.org>
Sent: Saturday, May 5, 2018 12:36:07 PM
To: Chuck Guzis; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Old core memory system.
SDS built a 24 bit system with Parity too, the CDC 924 was 24bit,
there were a few others and I believe but can not recall for sure, a
navy 24 bit maybe done by ERA.
bb
On Sat, May 5, 2018 at 2:32 PM, Chuck Guzis via cctalk
<cctalk at classiccmp.org> wrote:
> On 05/05/2018 10:23 AM, Pete Lancashire via cctalk wrote:
>> Core temp was a big issue even in commercial environments. You didn't see
>> it temp but you would see core [driver] current.
>
> The early IBM 7000 series (7070, 7080, 7090) kept core in a
> temperature-regulated oil bath. Later versions used pre-heated air
> (e.g. 7094 core).
>
> On the CDC 7600, hitting the same area of care repeatedly could cause it
> to overheat and throw parity errors. Circuitry to detect this would
> slow-down repeated accesses.
>
> That was for CM. I seem to recall someone telling me that there was no
> such provision in PP core and a "jump to self" was sufficient to throw
> an error--but that may be a shaggy-dog story.
>
> --Chuck
Does anyone have any software for developing for the Intel 3000 series? I
bought some parts on eBay and am contemplating a bit-slice PDP-8 or DG Nova
for fun.
Bitsavers has some 3000 series manuals, but I can't seem to find any "bits"
of software. Looks like CROMIS is the cross microprogram assembler, which
looks like it would've run on an MDS-800.
Apparently the CROMIS sources are in Fortran IV, and provide both XMAS and
XMAP, the cross microassembler and a programming file generator,
respectively.
Anyways, if anyone has any bits of Intel 3000 development software or
simulators, I would be very interested in checking them out.
Thanks!
Kyle
https://www.acrosups.top/vintage-computing-c-29/
Don't pay attention to where it says Old Price.
Click on the item and see the discounted price.
Free shipping over $15.
Not affiliated with seller, etc.
Cindy Croxton
Electronics Plus
1613 Water Street
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830-370-3239 cell
sales at elecplus.com
AOL IM elcpls
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Actually, for me, this could probably be expanded to "early 90s SCSI HDD
edition".
As a collector of early 90s Sun systems, I have many Seagate ST1480N
(aka Sun 424 drives). Starting two year ago, they all started dying. Out
of a dozen, I am now down to one working one. Is anyone repairing/saving
these or should I just throw them out when they fail?
alan
> From: Ali
> There is a guy with a listing with missing parts which he is
> advertising as working. It has been listed for over two years now ...
> I offered to buy a part off of it for ~half of what he wanted
> for everything and he replied that "the value was in keeping it all together".
Well, since he's not an expert (which we can deduce from his calling it 'working'
when it's missing bits), perhaps he feared you were trying to grab the 'good bit',
and leave him with un-salable dreck.
Although given the amount you were willing to pay, maybe he is not thinking hard!
Noel
> From: Alan Perry
> They went unsold again and I waited for the next auction run. I offered
> the split-the-difference price again and they countered even higher. I
> got the message and have stopped bidding. That was a couple months ago
> and they still have sold any of those systems.
Eventually they may wise up. I had a guy selling a group of 4 DEC drives,
asking for somewhat over the going rate. I pointed the guy at a prior 'open
bidding' sale for one, demonstrating the 'fair market value', and offered him
4 times that, plus shipping. He comes back with a much higher number. So I
waited a year, they were still there, now he was more willing to be reasonable.
So I suggest waiting for a couple more months and write him a 'I see it's
been X months, my offer of Y is still open' note.
Noel
