On Wed, Jul 15, 2015 at 7:05 AM, Jay Jaeger wrote:
> ...though I have not actually checked. The B5000 had IO processors as well.
Not quite, the B5000 and B5500 arguably had DMA channels (up to 4 of
them), but not independent IO processors (with their own machine code)
that were seen on the later
We received more documentation from the donor last week so we were able to
run the processor LINC instruction tests. The new docs are already scanned
and on Bitsavers. The LINC diags failed, but we quickly found the bad M160
flip-chip and now both LINC diags run OK.
We continued debugging the "LGP
>
> So, tony, if I'm correct, you just called "bullshit", right?
I assume this relates to my comments on static damage of PDP11 PSUs,
I am not sure I would quite put it that way (not on a public list :-)) but (a)
I have never seen a DEC
PSU (in a PDP11 or elsewhere) damaged by static, certainl
Is anyone aware of any published detailed designs of Multibus
arbitration circuitry, NOT using the Intel bus arbiter chips (e.g.,
8218, 8219, 8289, 82289)? I know various vendors making Multibus CPU
cards for non-Intel CPUs (e.g., 68K or NS 32K) sometimes designed
their own arbiters out of TTL and/
On 07/18/2015 09:06 PM, Mike Stein wrote:
I always wondered which was more efficient, multiplexing among
essentially complete 'computers per user' sharing a common I/O 'channel'
or swapping processes and memory banks...
Well, the multiplexing (via hardware) memory among a single processor
did
On 7/18/2015 10:06 PM, Mike Stein wrote:
I always wondered which was more efficient, multiplexing among
essentially complete 'computers per user' sharing a common I/O 'channel'
or swapping processes and memory banks...
m
I can't think of any system for the average user that runs
efficient.
Be
- Original Message -
From: "Chuck Guzis"
To: ;
"discuss...@classiccmp.org:On-Topic and Off-Topic
Posts"
Sent: Friday, July 17, 2015 12:21 PM
Subject: Re: Reproducing old machines with newer
technology
On 07/16/2015 11:45 AM, Mike Stein wrote:
Not the same thing of course but rem
So, tony, if I'm correct, you just called "bullshit", right?
--
--- Dave Woyciesjes
--- ICQ# 905818
--- CompTIA A+ Certified IT Tech -http://certification.comptia.org/--- HDI
Certified Support Center Analyst -http://www.ThinkHDI.com/Registered Linux user
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"Computers have lots of m
Hi
I am working on an 8/f version. Its not far along enough to send out
just yet .
Rod
On 18/07/2015 12:34, simon wrote:
Hi Rod, that sounds like a good idea. we have a 8/f here and i could
try to match your version with it.
simon
On 18-07-15 00:14, Rod Smallwood wrote:
White layer 8/
On Sat, Jul 18, 2015 at 5:53 PM, Ian Finder wrote:
> Hi Folks,
>
> I need help hunting down an item.
>
> This is a keyboard that shipped with a few AT&T / Teletype terminals with a
> 6-pin RJ connector.
I am also looking for one. I recently cam into a Blit and a 730+ ,
neither of which had a ke
Hi Folks,
I need help hunting down an item.
This is a keyboard that shipped with a few AT&T / Teletype terminals with a
6-pin RJ connector.
I recently obtained a BLIT terminal and would like to find a keyboard (and
mouse- the red lady bug one- if possible- but the keyboard is quite necessary)
Thank you all for the information. Ive been speaking with Paul Anderson on
the phone, he went into great detail a general overview on how to get the
machine apart and general beginner details. He referred me to the
appropriate Documents on bitsavers, plan is to pick up some packs of paper
and get t
Hi
You are welcome to the 8/e artwork.
Email me direct and I'll send them to you.
I already have an 8/f panel underway.
The artwork is not suitable for producing silkscreen masters from yet.
Its just to allow those with one or other of the two types of 8/e with
the different switch marking
Hi Rod, that sounds like a good idea. we have a 8/f here and i could try
to match your version with it.
simon
On 18-07-15 00:14, Rod Smallwood wrote:
White layer 8/e front panels A and B
On 17/07/2015 22:23, Adrian Stoness wrote:
Sure
On Friday, July 17, 2015, Rod Smallwood
wrote:
Hi Gu
More myths and ledgends.
As I remember it this all started with the arrival of FET's having a
very high input impedance due to narrow gate areas.
If you were daft enough not to have a path to earth
and let a charge build up on the gate then you could exceed the
breakdown voltage across the ju
>
> Oh, sorry, didn't realize they used switchers for the PDP-11s.
There have been _many_ DEC PSU designed used for the PDP11. I think all of them
used some
kind of switching regulator for the +5V line. A quick glance at the printsets
will settle it..
> However I was talking with a friend of
For those who expressed an interest in the STSC APL*PLUS manuals for
VAX/VMS I happy to report they are now available from here:
http://wickensonline.co.uk/static/files/scans/APL-Plus-System-for-the-VAX-VMS-Environment-Users-Manual-Release-1-Aug-1987-STS.pdf
http://wickensonline.co.uk/static/
On 07/17/2015 11:17 PM, tony duell wrote:
On the other hand if the +5V line did get too high it could have wiped out
just about every IC in the unit. Ouch!. I've only ever had this happen once, and
it was in a much lesser machine than a PDP11 (fortunately).
Many years ago, I managed to feed +12
Oh, sorry, didn't realize they used switchers for the PDP-11s.
However I was talking with a friend of mine last night about my error,
and he told me that the switching supplies for the PDP-11s were very
unreliable back in the day. He often had to troubleshoot the machines
back then. A common f
Rich Alderson wrote:
>
> > It is generally a good idea to re-form electrolytic capacitors in power
> > supplies, and to bench check the power supplies (under some kind of
> > load) before actually applying power to the whole unit.
>
> It is always a good idea to replace electrolytic capacitors in
Well, it took a little bit of monkeying around but I was able to get the
the V7.3 ISO I received from a helpful fellow list member to boot on my
3000/400 ... it seems to only like my RRD37 drive and only on the internal
SCSI channel ... she is finicky ... but hey, whatever gets the job done :O
Woo
White layer 8/e front panels A and B
On 17/07/2015 22:23, Adrian Stoness wrote:
Sure
On Friday, July 17, 2015, Rod Smallwood
wrote:
Hi Guys!
Further to my previous email.
If anybody would like to see the artwork I can send you a copy.
Its in *.svg format.
Regards
Rod
What I am wondering about, though, is the extra current they draw while
they are forming up while the power supply is running. The capacitor
might survive it (not get so hot that it fails), but the things supply
the higher than ordinary current to it might not. Killed a bridge
rectifier on a PDP-
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