On Sun, Nov 4, 2018 at 12:31 AM Guy Dunphy via cctalk
wrote:
> Incidentally, several people called the material used for the lamps shroud
> plate 'MDF.'
> It's not, it's that high density cloth+bakelite (or something) material used
> for electrical switchboard panels. Very tough stuff.
Ah. Fro
I have posted previously about a DEC Pro 350 I am trying to get working
again. At the moment it seems to be constantly resetting the CPU.
I have traced one possible path for the cause of this back to a NEC chip for
which I cannot find a datasheet. It is a 40-pin DIP it is marked "NEC Japan
8239
On Sun, Nov 4, 2018 at 12:37 PM Rob Jarratt via cctalk
wrote:
>
> I have posted previously about a DEC Pro 350 I am trying to get working
> again. At the moment it seems to be constantly resetting the CPU.
>
>
>
> I have traced one possible path for the cause of this back to a NEC chip for
> which
> -Original Message-
> From: Tony Duell [mailto:ard.p850...@gmail.com]
> Sent: 04 November 2018 12:42
> To: r...@jarratt.me.uk; Jarratt RMA ; General
> Discussion: On-Topic and Off-Topic Posts
> Subject: Re: Datasheet for a NEC Chip in DEC Professional 350
>
> On Sun, Nov 4, 2018 at 12:
> From: Steven Malikoff
>> The bulbs had "flying leads" coming out of the glass, no bases ... The
>> bulbs just hovered over the PCB
> It makes me wonder if the 11/15 is much the same.
I just had a look at my -11/20 (the two are basically the same machine; the
/15 was intended f
A constant pulsing reset is usually a watchdog at play. Hardware watchdogs are
usually implemented in systems to reset everything should the system not meet
one specific criteria: eg cpu touch one memory address before X amount of time,
or pcb voltage lower than X volts, etc.
Watchdogs are also
I know that the Rainbow's AFU watchdog was the bane of my existence back in
the day... It would fire if interrupts were disabled too long.
Warner
On Sun, Nov 4, 2018 at 6:47 AM Eduardo Cruz via cctalk <
cctalk@classiccmp.org> wrote:
> A constant pulsing reset is usually a watchdog at play. Hardw
William Donzelli wrote:
So, what is this i960-based card for?
They were the routers. At the core nodes of the network, there would
be a big RS/6000s (very early POWER1 types) that would each do about
4-5 high speed interfaces (FDDI, HSSI, and 10base2). Each interface
was one of these cards, so e
On 11/03/2018 09:48 PM, Steve Malikoff via cctalk wrote:
Later PDP-8 models used "bi-pin base" bulbs that had a
factory-molded-on base and a pair of sturdy pins.
Sounds very /360-ish :)
Well, sort of the same idea, but not that close. The 360
had metal cases with the pins in a plastic rear piec
there are 2 manuals one is the art version the other one is a
programmers one but the ocr is horrible towards end. I think there
are one or 2 more things around here too.
There must have been some of these units that survived? aside from ours?
Ed#
Yes, a company I was working for OEMed what because IBM's X25Net
software and it was ported to their RTIC i960 cards from our own
homegrown i960 cards.
The IBM group we worked with was in La Gaude France but we heard the
RTIC cards were developed in Boca Raton, FL.
We ran VxWorks on them.
T
Hello, been a while since ive written to the list. I met someone the other
day that used to work for modcomp. He gave me a tour, he still has working
modcomp computers in his home. He was clearing out a bunch of stuff, he
gave me a bunch of terminals and dos era computers. Among the computers is
a
> On Nov 4, 2018, at 9:37 AM, Todd Goodman via cctalk
> wrote:
>
> Yes, a company I was working for OEMed what because IBM's X25Net software and
> it was ported to their RTIC i960 cards from our own homegrown i960 cards.
>
> The IBM group we worked with was in La Gaude France but we heard th
I was curious. It would seem that it would be easy enough to make an emulator
or simulator for but the OCR is really bad.
There may be one out there. It would be a shame if yours was the last one.
Dwight
From: ED SHARPE
Sent: Sunday, November 4, 2018 9:00 AM
To:
Hi Bill,
many thanks for the efforts spent on scanning those fantastic
brochures. I have some of the 1602s and a MSE14, but has any one
out there seen a 1601 in real life? Was this really sold or was
it still a paper-machine as it was replaced by the 1602?
Any comment from contemporary witnes
I may have more 1601 stuff, if I find I will scan and post. I know there
is the upcoming Nova event so I thought this would be good timing. I have
a lot of Nova docstoo, but I believe they're already posted on the WWW.
Bill
On Sun, Nov 4, 2018 at 2:28 PM erik--- via cctalk
wrote:
>
> Hi Bill,
The writeup for this machine is here:
http://everist.org/NobLog/20181104_PDP-8S.htm
For those who are interested.
Guy
> I know there
> is the upcoming Nova event so I thought this would be good timing.
You missed it!
--
Will
- Original Message -
From: "Adrian Graham via cctalk"
To: "General Discussion: On-Topic and Off-Topic Posts"
Sent: Saturday, November 03, 2018 4:59 AM
Subject: Re: How to work out unknown PSU replacement
...
> Today I’ll break out the ’tin foil covered sponge’ method of tracing any
>
> -Original Message-
> From: Eduardo Cruz [mailto:edcr...@gmail.com]
> Sent: 04 November 2018 13:47
> To: r...@jarratt.me.uk; Rob Jarratt ; General
> Discussion: On-Topic and Off-Topic Posts
> Cc: Tony Duell
> Subject: Re: Datasheet for a NEC Chip in DEC Professional 350
>
> A constan
Just had a look to this manual:
http://www.bitsavers.org/pdf/dec/pdp11/pro3xx/EK-PC350-TM-001_Professional_300_Series_Technical_Manual_Dec82.pdf
5.2.3.4 Power-Up Self-Tests, this section mentions the existence of rom
containing basic power up tests. I assume you are not even getting there
and your
On Sun, Nov 4, 2018, 16:23 Mike Stein via cctalk
wrote:
>
> - Original Message -
> From: "Adrian Graham via cctalk"
> To: "General Discussion: On-Topic and Off-Topic Posts" <
> cctalk@classiccmp.org>
> Sent: Saturday, November 03, 2018 4:59 AM
> Subject: Re: How to work out unknown PSU r
There was a NEC CPU upgrade kit, one used to replace the stock CPU, is this
what you're talking about here? If so, I believe there was a battery that
went with the chip. If the battery is dead the chip would not work. Or am
I totally remember this wrong?
b
On Sun, Nov 4, 2018 at 4:36 PM Ed C. v
- Original Message -
From: "Kyle Owen via cctalk"
To: "General Discussion: On-Topic and Off-Topic Posts"
Sent: Sunday, November 04, 2018 4:48 PM
Subject: Re: How to work out unknown PSU replacement
On Sun, Nov 4, 2018, 16:23 Mike Stein via cctalk
wrote:
>
> - Original Message -
On Sun, Nov 4, 2018, 16:56 Mike Stein wrote:
>
> Neat trick; surprised I'd never heard of it before in my decades of
> trouble-shooting. Then again, at my advanced age and senility I might just
> have forgotten... ;-)
>
> Thanks!
> >
>
Hah! Probably also best to discharge the caps before proceed
Noel said
> I just had a look at my -11/20 (the two are basically the same machine; the
> /15 was intended for the OEM market, the /20 the end-user), and it has an
> intermediate between this, and the final incandescent bulb form (as on the
> -11/45), where there were bulbs with plastic bases plugg
Hi there!
I don't usually see much discussion on old IBM boxes, but I was looking for
a reasonably-powerful RS/6000 that can run AIX 4.1 and maybe 3.2.5, can
accommodate some decent disks, and isn't 200lbs. The 7012-390 looks perfect,
but I found this one on eBay:
https://www.ebay.com/itm/
They’re a nice box, I had one on my desk at work about 20 years ago. My guess
is it’s someone hoping to find some business that *NEEDS* one and is willing to
pay an insane amount of money.
Zane
> On Nov 4, 2018, at 8:35 PM, Benjamin Huntsman via cctalk
> wrote:
>
> Hi there!
>
> I don'
>I don't usually see much discussion on old IBM boxes, but I was looking
> for a reasonably-powerful RS/6000 that can run AIX 4.1
If you're not desperate for 3.2.5, you could also consider an Apple Network
Server, which can run their own version of 4.1.4 and 4.1.5. Those pop up now
and then as
29 matches
Mail list logo
