> -Original Message-
> From: cctech [mailto:cctech-boun...@classiccmp.org] On Behalf Of Paul
Koning via cctech
> Sent: Wednesday, June 19, 2019 1:59 PM
> To: Bob Smith; General Discussion: On-Topic and Off-Topic Posts
> Cc: Al Kossow
> Subject: Re: PDP 11/15
>
>...
On Wed, Jun 19, 2019 at 3:11 PM Mark Linimon via cctalk <
cctalk@classiccmp.org> wrote:
> On Wed, Jun 19, 2019 at 03:01:50PM -0400, Jacob Ritorto via cctalk wrote:
> > You know, one of the reasons I'm still on here is for the anecdotes
>
> Agreed!
>
> mcl
>
I am a big fan of bargain 11/15 too, th
On Wed, Jun 19, 2019 at 03:01:50PM -0400, Jacob Ritorto via cctalk wrote:
> You know, one of the reasons I'm still on here is for the anecdotes
Agreed!
mcl
On Tue, Jun 18, 2019 at 11:15 PM Randy Dawson via cctalk <
cctalk@classiccmp.org> wrote:
> Paul,
> That is so cool!
> How much space would it take?
> That is my first computer (outside of timesharing and Z-80 homebrew).
> My first job was on the PDP-15 to transcribe the APOLLO analog range tapes
>
> From: Bob Smith
> there have been refs to another more modern unit, based on LSI[-]11
> or later chip set
I've never heard of that, and I wonder if DEC would really have released
a new product with the same name as an old one (the two PDP-11/10's
are different, as I'm not sure many
> On Jun 19, 2019, at 1:49 PM, Bob Smith via cctalk
> wrote:
>
> IIRC, there are two models called //15.
> The original, 10.5 high, an 11/20 with no power fail. We dold that to
> Aeroflot with about 10 racks of periphs.
> although I have never seen one, there have been refs to another more
>
IIRC, there are two models called //15.
The original, 10.5 high, an 11/20 with no power fail. We dold that to
Aeroflot with about 10 racks of periphs.
although I have never seen one, there have been refs to another more
modern unit, based on LSI=11 or later chip set,
so I wonder if it is one of tho
On 6/18/19 8:15 PM, Randy Dawson via cctalk wrote:
> Paul,
> That is so cool!
> How much space would it take?
10.5" of rack space
it is a PDP-11 model 15 (first generation)
and Off-Topic Posts; cct...@vax-11.org
Subject: PDP 11/15
I bought a large package of DEC gear last year and it came with a PDP
11/15. I have no need for this classic, and put it on the list. A few
people responded, but because of my problems, I never followed up with
them.
For those who respon
I bought a large package of DEC gear last year and it came with a PDP
11/15. I have no need for this classic, and put it on the list. A few
people responded, but because of my problems, I never followed up with
them.
For those who responded, I apologize for dropping the ball. If anyone is
As some of you know, I've been waiting for a truckload of DEC items to come
in from Canada for quite a while. It was turned back at the boarder because
they changed their mind on the paperwork last month.
Well, It should be here this week, and there is a PDP-11/15 I will be
selling. If yo
> From: Paul Popelka
> I was wondering how much delay the KT-11B introduces.
That's a _very_ interesting question; AFAIK, the documentation doesn't say.
If there's a cache miss, of course, there's one memory cycle delay to load
it.
If the cache hits, though, there's still added gate dela
> From: Noel C.
> Was the Computer History Wiki thing of any use?
Yes. It answered a little of what I was wondering about. It mentioned that
there is a cache of page table entries. I was wondering how much delay the
KT-11B introduces.
> > Does anyone know if schematics for it were included in
> On Aug 21, 2016, at 11:36 PM, Ethan Dicks wrote:
>
> ...
> Second, many/most of the CPU modules are -YA variants, and the "PDP-11
> Field Guide" mentions that they would be part of a KH11-A. About the
> only description I can find for what that is, is a single mention (in
> PDP-11_Peripherals
On Mon, Aug 22, 2016 at 8:49 AM, Noel Chiappa wrote:
> > I recall reading _somewhere_ about some early PDP-11 memory management
> > thing used on early PDP-11 Unix that supported the KE11 ... by having a
> > small window that allowed user code access to the KE11. ...
> > Does this
On Mon, Aug 22, 2016 at 8:16 AM, Noel Chiappa wrote:
> > From: Ethan Dicks
> > Second, many/most of the CPU modules are -YA variants, and the "PDP-11
> > Field Guide" mentions that they would be part of a KH11-A.
>
> I've been told that it's a revision to the CPU timings to reduce NPR
> I recall reading _somewhere_ about some early PDP-11 memory management
> thing used on early PDP-11 Unix that supported the KE11 ... by having a
> small window that allowed user code access to the KE11. ...
> Does this ring any bells for anyone?
Never mind - found it, it was in "
> From: Ethan Dicks
> Second, many/most of the CPU modules are -YA variants, and the "PDP-11
> Field Guide" mentions that they would be part of a KH11-A. About the
> only description I can find for what that is, is a single mention ..
> of the "large-system capability option" r
> From: Paul Popelka
> Thanks for posting that the KT-11B documentation is available.
Sure. Was the Computer History Wiki thing of any use?
> Does anyone know if schematics for it were included in the auction?
> ...
> If the schematics are available, are there plans to get on
Hi Ethan,
I've seen the M780s before, but its been a while.
The DT03 and DT07 are Unibus switiches.
I have several edited option/module lists I can look up boards for you.
Also a fellow list member just scanned a hardware spare parts list that
could have some relevant info in it. I'm sure he'll
Thanks for posting that the KT-11B documentation is available.
Does anyone know if schematics for it were included in the auction?
The flip chip board complement for it is in the posted document but nothing
else.
If the schematics are available, are there plans to get onto bitsavers?
Paul
Sent
On Sun, Aug 21, 2016 at 1:53 PM, Noel Chiappa wrote:
> http://gunkies.org/wiki/KA11_CPU
Interesting stuff on the KT11, but tangentally, I've been going over
my pile of parts (that I've described a few times over the years) from
an 11/20 I pulled from the dumpster at work 30 years ago. I finall
> I'm not sure how the KT11-B works, but my _suspicion_ ... is that it's
> not part of the CPU, but a UNIBUS device
So, I wuz wrong.
The Option Description (part User Manual, with a little bit of Technical
Manual thrown in) is now online:
http://bitsavers.trailing-edge.com/pdf/dec/pdp1
> From: Paul Koning
> It would have to be a Unibus bridge type device, i.e., it terminates
> the Unibus from the CPU, and at the other end originates a Unibus with
> mapped addresses on it.
Oh, right you are - I hadn't worked that out. (Probably because my head
is still full of KT
On Wed, Aug 03, 2016 at 10:18:07PM +1000, ste...@malikoff.com wrote:
> A few months back you might recall the road trip I did
I do, and I've been meaning to ask you what became of the PDP-9 that was
in the same room.
Thanks,
Pontus.
> On Aug 3, 2016, at 8:57 AM, Noel Chiappa wrote:
> ...
> I'm not sure how the KT11-B works, but my _suspicion_ (going from the
> pictures of that one that sold on eBay) is that it's not part of the CPU, but
> a UNIBUS device, which maps part of the UNIBUS which the CPU _can_ see (i.e.
> in the 0
> From: Steven Malikoff
> I'm wondering if there are any more differences apart from the lack of
> the two high address switches?
According to the -11/15-20 processor manual (pg. 2), the differences between
the two are i) the -15 has only one hardware interrupt level, not four (the
la
the
Foxboro lime green colour trim) had only 16 address switches instead of the 18
found on that
machine, and that there might be two more vacant switch locations on the front
panel PCB
to be found lurking underneath when it came time to disassembling.
But having just seen the PDP-11/15 up on eBay
Hi Jim,
I think the box is a BA11-E and a H720 PS, if you want to keep it original.
I don't think I have any spare parts right now, but I have a lot to go
through yet.
Paul
On Sat, Dec 5, 2015 at 1:04 AM, jwsmobile wrote:
> I'm looking for any of these, starting with most essentially the back
I'm looking for any of these, starting with most essentially the backplane.
power supply next, then frame if anyone has one that is empty looking
for some filling.
Thanks
Jim
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