21 Oct
2005
21 Oct
'05
7:43 a.m.
Subject: Re: RL01 drive select plug and power supply questions
From: Johnny Billquist <bqt at Update.UU.SE>
Date: Fri, 21 Oct 2005 13:16:33 +0200 (CEST)
To: cctalk at classiccmp.org
On Thu, 20 Oct 2005, Allison <ajp166 at bellatlantic.net> wrote:
I think I'll slightly disagree with you here.
While all you say is essentially true, the DLV11 is a tremendour burden on
the system compared to the DHV11. So if you actually want to run serial
connections to a machine, keep the DHV11, and don't use the console more
than absolutely neccesary.
Big difference between DMA and interrupts you know...
Yes I do. However for a single user system the load is not an issue.
If your running a timeshare system such as RSTS or RSX with more than one
user then DHV11 sense as well.
For most of my 11s four lines is the limit for what I can seem to keep busy.
Figure a user terminal, LA100 Printer and serial line for modem or data
line to another system. At the extreme I've run two terminals for OSs
that support that but, I can only type on on at any instant. ;)
Allison
Subject:
Re: RL01 drive select plug and power supply questions
From: David Betz <dbetz at xlisper.mv.com>
Date: Thu, 20 Oct 2005 18:26:02 -0400
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>
Thanks for your reply. I guess I'm okay with power even if I leave in
the DHV11 as it seems my BA11-N has been upgraded to a H7861 power
Unless you need the IO I'd pull it anyway. The system will run cooler
and I doubt you have need for the lines. DHV11 is a MUX and you need
the chassis kit to break out all the serial lines. Most OSs for PDP11
don't use it (system build time option) and the DLV11J is easier to use
and program. The DHV11 cannot be used for a console either. 
21 Oct
21 Oct
8:22 a.m.
New subject: OLD SCSI tower parts
I have an old SCSI tower made by CI Design CO , Irvine California that I am
trying to find some rails for. I checked the company website but the part
numbers do not come up in their search engine.
The case is an 8 bay 5.25" slot variety (beiege floor standing not a rack
type) that I have a few 3.5" SCA HDs in connected to an old Mac.
Rails part number: 01-1039-B
HD perforated plastic case bezel : 02-3060-01B
5.25" to 3.5" adapters: 01-1039-B
Currently I have 5 sets and 3 open bays, looking for 3 more sets. I use this
to dump video captures as a hobby so I don't want to spend too much on
these. Anybody know where I can find them?
9:51 a.m.
New subject: OLD SCSI tower parts
Teo Zenios wrote:
I have an old SCSI tower made by CI Design CO , Irvine
California that I am
trying to find some rails for. I checked the company website but the part
numbers do not come up in their search engine.
If you can get a photo maybe someone will recognise them? I've seen
various rails in PCs and drive cabinets and the like over the years!
cheers
Jules
10:05 a.m.
New subject: OLD SCSI tower parts
Unless they went with their own off the wall internal design (ala
Compaq) then most used the standard black plastic rails (there are about
2-3 different variations) or the "C" bracket shaped metal rails, so if
you can take a ruler and put one of the rails next to it and take some
photo's, that would certainly help.
Curt
Jules Richardson wrote:
Teo Zenios wrote:
--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.12.4/146 - Release Date: 10/21/2005
I have an old SCSI tower made by CI Design CO ,
Irvine California
that I am
trying to find some rails for. I checked the company website but the
part
numbers do not come up in their search engine.
If you can get a photo maybe someone will recognise them? I've seen
various rails in PCs and drive cabinets and the like over the years!
cheers
Jules
10:37 a.m.
New subject: OLD SCSI tower parts
There rails are metal. I will try to get a picture of them later today after
I get back from running around.
----- Original Message -----
From: "Curt @ Atari Museum" <curt at atarimuseum.com>
To: <General at smtp4.suscom.net>
Sent: Friday, October 21, 2005 10:05 AM
Subject: Re: OLD SCSI tower parts
Unless they went with their own off the wall internal
design (ala
Compaq) then most used the standard black plastic rails (there are about
2-3 different variations) or the "C" bracket shaped metal rails, so if
you can take a ruler and put one of the rails next to it and take some
photo's, that would certainly help.
Curt
Jules Richardson wrote:
Teo Zenios wrote:
--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.12.4/146 - Release Date: 10/21/2005
I have an old SCSI tower made by CI Design CO ,
Irvine California
that I am
trying to find some rails for. I checked the company website but the
part
numbers do not come up in their search engine.
If you can get a photo maybe someone will recognise them? I've seen
various rails in PCs and drive cabinets and the like over the years!
cheers
Jules
26 Oct
26 Oct
1:59 p.m.
New subject: OLD SCSI tower parts
CI Designs actually got out the first clones of the rails used in AT boxes,
and
later expanded to building up boxes for peripherals.
Their building is local to me, and I have seen lots of scrap from them over
the years.
I never got the slide photos to come up, but I don't have much in the way
of this sort of scrap. I just did a purge of my storage where that was,
and let all my bent metal go to the skip in the process.
Jim
On 10/21/05, Curt @ Atari Museum <curt at atarimuseum.com> wrote:
Unless they went with their own off the wall internal design (ala
Compaq) then most used the standard black plastic rails (there are about
2-3 different variations) or the "C" bracket shaped metal rails, so if
you can take a ruler and put one of the rails next to it and take some
photo's, that would certainly help.
24 Oct
24 Oct
noon
New subject: OLD SCSI tower parts
----- Original Message -----
From: "Jules Richardson" <julesrichardsonuk at yahoo.co.uk>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Friday, October 21, 2005 9:51 AM
Subject: Re: OLD SCSI tower parts
Ok here are links to the photos:
http://www.imagedump.com/index.cgi?pick=get&tp=333343
http://www.imagedump.com/index.cgi?pick=get&tp=333338
http://www.imagedump.com/index.cgi?pick=get&tp=333341
Each picture shows a front an back. I hope they provide enough detail since
I had to shrink them a bit to be able to use imagedump.com (200K max size).
These were taken using my Umax 1200S scanner connected to my Mac IIfx using
Photoshop 3.
Teo Zenios wrote:
> I have an old SCSI tower made by CI Design CO , Irvine California that I
am
> trying to find some rails for. I checked the
company website but the
part
numbers do not
come up in their search engine.
If you can get a photo maybe someone will recognise them? I've seen
various rails in PCs and drive cabinets and the like over the years!
cheers
Jules 
21 Oct
21 Oct
10:58 a.m.
>>>> "Allison" == Allison
<ajp166 at bellatlantic.net> writes:
> Subject: Re: RL01 drive select plug and power
supply questions
> From: Johnny Billquist <bqt at Update.UU.SE> Date: Fri, 21 Oct 2005
> 13:16:33 +0200 (CEST) To: cctalk at classiccmp.org
>
> I think I'll slightly disagree with you here. While all you say
> is essentially true, the DLV11 is a tremendour burden on the
> system compared to the DHV11. So if you actually want to run
> serial connections to a machine, keep the DHV11, and don't use the
> console more than absolutely neccesary.
>
> Big difference between DMA and interrupts you know...
Allison> Yes I do. However for a single user system the load is not
Allison> an issue. If your running a timeshare system such as RSTS
Allison> or RSX with more than one user then DHV11 sense as well.
Not true. 9600 baud is 960 interrupts per second, on a character I/O
device. That's a big number for a PDP-11. Output will be
significantly less of a burden with a DH type output controller than
with other types -- even for just one active terminal.
Allison> For most of my 11s four lines is the limit for what I can
Allison> seem to keep busy. Figure a user terminal, LA100 Printer
Allison> and serial line for modem or data line to another system. At
Allison> the extreme I've run two terminals for OSs that support that
Allison> but, I can only type on on at any instant. ;)
Sure, if you're mostly doing editing, then the CPU burden of high
speed output may not be obvious. If you had an LN03 or similar
printer, you might see it more easily. An LA100, of course, isn't
much of a problem because it is quite slow.
paul
6849
days inactive
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7 comments
6 participants
participants (6)
-
ajp166＠bellatlantic.net -
curt＠atarimuseum.com -
james.w.stephens＠gmail.com -
julesrichardsonuk＠yahoo.co.uk -
pkoning＠equallogic.com -
teoz＠neo.rr.com