On Sun, 20 Feb 2022 at 21:20, Bill Gunshannon via cctalk
wrote:
>
> On 2/20/22 15:31, Chuck Guzis via cctalk wrote:
> > On 2/20/22 10:10, Mark Kahrs via cctalk wrote:
> >> I heard Butler Lampson once exclaim that ECL design was in some ways easier
> >> than TTL. If you terminated every line, you
On 2/20/22 14:31, Chuck Guzis via cctalk wrote:
On 2/20/22 10:10, Mark Kahrs via cctalk wrote:
I heard Butler Lampson once exclaim that ECL design was in some ways easier
than TTL. If you terminated every line, you get controlled impedances with
controlled edges. This was the design
On 2/20/22 15:31, Chuck Guzis via cctalk wrote:
On 2/20/22 10:10, Mark Kahrs via cctalk wrote:
I heard Butler Lampson once exclaim that ECL design was in some ways easier
than TTL. If you terminated every line, you get controlled impedances with
controlled edges. This was the design
On 2/20/22 10:10, Mark Kahrs via cctalk wrote:
> I heard Butler Lampson once exclaim that ECL design was in some ways easier
> than TTL. If you terminated every line, you get controlled impedances with
> controlled edges. This was the design philosophy for the Dorado.
Indeed--ECL WW prototype
I heard Butler Lampson once exclaim that ECL design was in some ways easier
than TTL. If you terminated every line, you get controlled impedances with
controlled edges. This was the design philosophy for the Dorado.
> On Feb 19, 2022, at 1:28 PM, Jon Elson via cctalk
> wrote:
>
> On 2/18/22 21:43, ben via cctalk wrote:
>>
>> The 70's was all low scale tech. I suspect it was the high speed/edge rates
>> more the power that kept ECL from common use. Any other views on this topic.
>> Ben, who only had
On 2/18/22 21:43, ben via cctalk wrote:
The 70's was all low scale tech. I suspect it was the high
speed/edge rates more the power that kept ECL from common
use. Any other views on this topic. Ben, who only had
access to RADIO SHACK in the 70's.
PS: Still grumbling about buying life time
On 2/18/22 15:35, Paul Koning wrote:
On Feb 18, 2022, at 3:18 PM, Gary Grebus wrote:
On 2/18/22 09:46, Paul Koning wrote:
...The 9000 also had its own I/O bus, XMI, different from BI. I don't know how
its performance compares, whether it was worth the effort.
XMI already existed as the
On 2022-02-18 8:21 p.m., Mark Linimon via cctalk wrote:
On Fri, Feb 18, 2022 at 05:25:26PM -0500, Patrick Finnegan via cctalk wrote:
Yours will be a lot cheaper to run.
Custom ECL chips?
I think I can go with "relatively cheaper".
Make sure you have a bazillion BTU of air conditioning ...
On Fri, Feb 18, 2022 at 05:25:26PM -0500, Patrick Finnegan via cctalk wrote:
> Yours will be a lot cheaper to run.
Custom ECL chips?
I think I can go with "relatively cheaper".
Make sure you have a bazillion BTU of air conditioning ...
(Yes, I have had experience with ECL, albeit 1970s
There's an issue of DTJ dedicated to the 9000:
http://dtjcd.vmsresource.org.uk/pdfs/dtj_v02-04_1990.pdf
On Fri, Feb 18, 2022 at 11:01:40PM +, Antonio Carlini via cctalk wrote:
> On 18/02/2022 17:16, Lee Courtney via cctalk wrote:
> > Paul,
> >
> > What was the timeframe for the MPP?
> >
>
On 18/02/2022 17:16, Lee Courtney via cctalk wrote:
Paul,
What was the timeframe for the MPP?
Lee
The earliest DECmpp reference I can find is from 1991:
https://eisner.decus.org/anon/htnotes/note?f1=INDUSTRY_NEWS=551.1
You can peruse the service manual here:
On Fri, 18 Feb 2022, Paul Koning via cctalk wrote:
> From what was just reported, the 6000 series indeed did it that way.
> But I think on the 9000 it was an I/O bus too. I definitely remember
> some work on XMI based I/O devices, in particular an FDDI card. And
> indeed you can find a spec
Cool! It's the baby version of the two 9000/440s I recently rescued.
Yours will be a lot cheaper to run. I'm still working on digesting the
documentation for mine before I try to get them running.
Pictures of mine in their new home: https://i.imgur.com/sVgkuG9.jpg
Patrick Finnegan
On Fri, Feb
> On Feb 18, 2022, at 4:30 PM, Chris Zach via cctalk
> wrote:
>
>> XMI already existed as the system bus for the VAX 6000 series machines.
>> I/O on the VAX 6000's was via an XMI-to-BI bridge. I don't remember the
>> exact performance specs on XMI, but it was wider and faster than BI.
XMI already existed as the system bus for the VAX 6000 series machines.
I/O on the VAX 6000's was via an XMI-to-BI bridge. I don't remember
the exact performance specs on XMI, but it was wider and faster than BI.
I thought XMI was only supposed to be a CPU/memory bus, with IO being
done
On 2/18/22 09:46, Paul Koning wrote:
On Feb 18, 2022, at 7:08 AM, Joerg Hoppe via cctalk
wrote:
Hi,
my computer club c-c-g.de could acquire the remains of a VAX9000 !
The machine ran at the GWDG computing center in G?ttingen, Germany, around 1993.
Parts of it were in stock of their museum
https://en.wikipedia.org/wiki/MasPar says that MasPar was founded by ex-DEC
chip VP Jeff Kalb. He took a design done at DEC, for a massively parallel
machine inspired by the Goodyear MPP with some changes. DEC decided not to
build that so MasPar did and DEC then resold it. The
On 18/02/2022 20:35, Paul Koning via cctalk wrote:
There also was an effort at one point to adopt FutureBus in DEC systems. We
did a pile of design in the network architecture group to figure out how to
handle interrupts and bus cycles efficiently; I don't remember if anything
actually
> On Feb 18, 2022, at 3:18 PM, Gary Grebus wrote:
>
> On 2/18/22 09:46, Paul Koning wrote:
>> ...The 9000 also had its own I/O bus, XMI, different from BI. I don't know
>> how its performance compares, whether it was worth the effort.
>
> XMI already existed as the system bus for the VAX
On 2/18/22 13:30, Josh Dersch via cctalk wrote:
On Fri, Feb 18, 2022 at 6:55 AM Paul Koning via cctalk <
cctalk@classiccmp.org> wrote:
Speaking of vector processors: there's a very obscure DEC processor, the
DEC MPP. I remember seeing the processor architecture document when it was
being
On Fri, Feb 18, 2022 at 6:55 AM Paul Koning via cctalk <
cctalk@classiccmp.org> wrote:
>
>
>
>
> Speaking of vector processors: there's a very obscure DEC processor, the
> DEC MPP. I remember seeing the processor architecture document when it was
> being designed, not sure why. It's a very-RISC
> On Feb 18, 2022, at 12:16 PM, Lee Courtney wrote:
>
> Paul,
>
> What was the timeframe for the MPP?
I thought late 1980s. Just did some searching, which turns up some manuals for
the "DecMPP 12000". And a trade press article that says it's a rebadged MasPar
machine.
Paul,
What was the timeframe for the MPP?
Lee
On Fri, Feb 18, 2022 at 6:47 AM Paul Koning via cctalk <
cctalk@classiccmp.org> wrote:
>
>
> > On Feb 18, 2022, at 7:08 AM, Joerg Hoppe via cctalk <
> cctalk@classiccmp.org> wrote:
> >
> > Hi,
> >
> > my computer club c-c-g.de could acquire the
> On Feb 18, 2022, at 7:08 AM, Joerg Hoppe via cctalk
> wrote:
>
> Hi,
>
> my computer club c-c-g.de could acquire the remains of a VAX9000 !
> The machine ran at the GWDG computing center in Göttingen, Germany, around
> 1993.
> Parts of it were in stock of their museum for 20+ years.
>
>
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