Re: DEC H960 stabiliser feet. Have some questions.

[Steve Malikoff via cctalk]

Pete said
> On 07/01/2018 01:44, Chuck Guzis via cctalk wrote:
>> On 01/06/2018 04:54 PM, Pete Turnbull via cctalk wrote:
>>
>>> No, as would be obvious to anyone looking carefully at the photo (or the
>>> real thing!), it's 1/4" x 20 UNC.  I really must learn to think before
>>> putting finger to keyboard.
>>
>> If it's "quarter-twenty", that's a size shared by many refrigerators and
>> other heavy household appliances.  I think I even have a few of those
>> mushroom-headed screws salvaged from one.
>
> Except the proper screws are countersink head, not mushroom, because
> mushroom heads would prevent the kickplate being fitted (and the shank
> is 5/16" - only the end is threaded 1/4-20).

Thanks Pete and everyone, really fantastic input.
Using the new bolt info, it's refined a little more:
http://web.aanet.com.au/~malikoff/pdp11/DEC_H960_stabiliser_foot_left_A-H952-BA_revision_3_dimensioned.jpg

I can't find anything suitable on MMC 
(https://www.mcmaster.com/#countersunk-head-machine-screws/=1b0p4yz )
so Chuck's probably right, machine them up. Maybe start from a long 5/16" shank 
hex-head bolt and put the
countersink and 1/4-20 thread on.
Thanks for the drawing for the kickplate. I'm assuming the plate goes on after 
the feet have been placed
on the rack, and the #10 screws hold it all together. I'm guessing the 
kickplate is 16 guage sheetmetal..?

Steve.

Re: Tek 40xx computer users

[Brad H via cctalk]

I regret we haven't been able to resusciate my 4051 yet.  Still kills power to 
the main board.
I didn't know there were games for the 40xx machines.  I didn't think they 
could with the limitations of the screen design, although I kinda thought the 
display would work well for, say, an adventure game.
B


Sent from my Samsung device

 Original message 
From: Randy Dawson via cctalk  
Date: 2018-01-06  10:01 PM  (GMT-08:00) 
To: Randy Dawson , "General Discussion: On-Topic and 
Off-Topic Posts"  
Subject: Re: Tek 40xx computer users 

This was for Mike Hass, he was not in the email chain, and I do not have his 
address.


But it' s a general shout out to the other Tek 40xx users out there...


Randy



From: cctalk  on behalf of Randy Dawson via 
cctalk 
Sent: Saturday, January 6, 2018 9:54 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Tek 40xx computer users

Hi Gary,


Well its been a year.


Some news from here:


Micheal Cranford finished his MAXIPACK and FASTGRAPHICS PACK, and the results 
are awesome.

50-100% increase in the graphics speed, and he put all the demos and games on 
the MAXIPACK.


I 3D printed the plastic case for the PACKs and they look good.


I would like to see if we can work together, to clone the ROMs out of the packs 
you have, or see if you are willing to sell duplicates you have.


I really need a communications PACK, my 4051 did not have the comm port.  I 
have no way to transfer data in and out, I was going to attempt it over GPIB, 
bit I did not get very far.


What is new from your end?


I think we are trying to organize a 405x users group, I am talking with a few 
other guys.


Cheers,


Randy



From: cctalk  on behalf of Mike Haas 

Sent: Thursday, October 27, 2016 8:10 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Tek 40xx computer users

Congrats on your new Tek.    My 4051 pile came from came indirectly from
Gary Spence, who had inhouse involvement with the model. (can't locate his
bio at the moment)  Here's what I got... somewhere:

4051, 2x 4907 Dual 8" floppys, and the "System Test Fixture" front panel, a
box of DC300 tapes
"GAS 6800"  - a Homebrew 4051  (maybe a prototype   4051  ???)

and  these paks:

RS232 I/O compak
dual port memorypack
UNIBURN EPROM burner pack
VIDEOFRAME digitizer
GPIB Enhancement rompack
RS232 Printer Interface
Parallel Interface
Rompack Switch
Data Communications Interface
8k Rom pack
Addressable Data Tracking backpack
IC Analyzer
Editor Pack
Filemanager Pack
Binary Program Loader Pack
Signal Processor Pack
Service Pack
Pack extender board
a few empty packs and several wired edges



On Sun, Oct 23, 2016 at 10:15 PM, Randy Dawson 
wrote:

> I bought the Tek 4051 on ebay today; Jason brought it to my house and it
> works perfectly, with about a half hour of programming instruction my 12
> old daughter was plotting a cat face.
>
>
> https://www.facebook.com/Thelma.Franco/videos/10154277153852670/
Log In or Sign Up to 
View
www.facebook.com
See posts, photos and more on Facebook.


Log In or Sign Up to 
View
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www.facebook.com
See posts, photos and more on Facebook.


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Facebook - Log In or Sign Up
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Create an account or log into Facebook. Connect with friends, family and other 
people you know. Share photos and videos, send messages and get updates.


See posts, photos and more on Facebook.


>
>
> I would like to get in touch with other users of this first personal
> computer, and find additional resources.
>
>
> Do you know where I can find an archive of BASIC programs for this?
>
>
> Has anybody built plug in cards in the back, mine came with a realtime
> clock and a "file manager", I do not know what that one does.
>
>
> I have some Tek scopes with IEE-488, and I will see if I can get the IEEE
> interface working.
>
>
> There was a DC300 tape in the machine:
>
>
> biorithm
>
> craps
>
> blackjack
>
> artillery
>
> tanks
>
> weatherwar
>
>
> The belt is broken in the tape, I have ordered some new DC300's and will
> transplant the tape.
>
>
> Any resources will be welcome!
>
>
> Randy
>
>
>
>
>

Re: Tek 40xx computer users

[Randy Dawson via cctalk]

This was for Mike Hass, he was not in the email chain, and I do not have his 
address.


But it' s a general shout out to the other Tek 40xx users out there...


Randy



From: cctalk  on behalf of Randy Dawson via 
cctalk 
Sent: Saturday, January 6, 2018 9:54 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Tek 40xx computer users

Hi Gary,


Well its been a year.


Some news from here:


Micheal Cranford finished his MAXIPACK and FASTGRAPHICS PACK, and the results 
are awesome.

50-100% increase in the graphics speed, and he put all the demos and games on 
the MAXIPACK.


I 3D printed the plastic case for the PACKs and they look good.


I would like to see if we can work together, to clone the ROMs out of the packs 
you have, or see if you are willing to sell duplicates you have.


I really need a communications PACK, my 4051 did not have the comm port.  I 
have no way to transfer data in and out, I was going to attempt it over GPIB, 
bit I did not get very far.


What is new from your end?


I think we are trying to organize a 405x users group, I am talking with a few 
other guys.


Cheers,


Randy



From: cctalk  on behalf of Mike Haas 

Sent: Thursday, October 27, 2016 8:10 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Tek 40xx computer users

Congrats on your new Tek.My 4051 pile came from came indirectly from
Gary Spence, who had inhouse involvement with the model. (can't locate his
bio at the moment)  Here's what I got... somewhere:

4051, 2x 4907 Dual 8" floppys, and the "System Test Fixture" front panel, a
box of DC300 tapes
"GAS 6800"  - a Homebrew 4051  (maybe a prototype   4051  ???)

and  these paks:

RS232 I/O compak
dual port memorypack
UNIBURN EPROM burner pack
VIDEOFRAME digitizer
GPIB Enhancement rompack
RS232 Printer Interface
Parallel Interface
Rompack Switch
Data Communications Interface
8k Rom pack
Addressable Data Tracking backpack
IC Analyzer
Editor Pack
Filemanager Pack
Binary Program Loader Pack
Signal Processor Pack
Service Pack
Pack extender board
a few empty packs and several wired edges



On Sun, Oct 23, 2016 at 10:15 PM, Randy Dawson 
wrote:

> I bought the Tek 4051 on ebay today; Jason brought it to my house and it
> works perfectly, with about a half hour of programming instruction my 12
> old daughter was plotting a cat face.
>
>
> https://www.facebook.com/Thelma.Franco/videos/10154277153852670/
Log In or Sign Up to 
View
www.facebook.com
See posts, photos and more on Facebook.


Log In or Sign Up to 
View
Log In or Sign Up to 
View
www.facebook.com
See posts, photos and more on Facebook.


www.facebook.com
[https://www.facebook.com/images/fb_icon_325x325.png]

Facebook - Log In or Sign Up
www.facebook.com
Create an account or log into Facebook. Connect with friends, family and other 
people you know. Share photos and videos, send messages and get updates.


See posts, photos and more on Facebook.


>
>
> I would like to get in touch with other users of this first personal
> computer, and find additional resources.
>
>
> Do you know where I can find an archive of BASIC programs for this?
>
>
> Has anybody built plug in cards in the back, mine came with a realtime
> clock and a "file manager", I do not know what that one does.
>
>
> I have some Tek scopes with IEE-488, and I will see if I can get the IEEE
> interface working.
>
>
> There was a DC300 tape in the machine:
>
>
> biorithm
>
> craps
>
> blackjack
>
> artillery
>
> tanks
>
> weatherwar
>
>
> The belt is broken in the tape, I have ordered some new DC300's and will
> transplant the tape.
>
>
> Any resources will be welcome!
>
>
> Randy
>
>
>
>
>

Re: Tek 40xx computer users

[Randy Dawson via cctalk]

Hi Gary,


Well its been a year.


Some news from here:


Micheal Cranford finished his MAXIPACK and FASTGRAPHICS PACK, and the results 
are awesome.

50-100% increase in the graphics speed, and he put all the demos and games on 
the MAXIPACK.


I 3D printed the plastic case for the PACKs and they look good.


I would like to see if we can work together, to clone the ROMs out of the packs 
you have, or see if you are willing to sell duplicates you have.


I really need a communications PACK, my 4051 did not have the comm port.  I 
have no way to transfer data in and out, I was going to attempt it over GPIB, 
bit I did not get very far.


What is new from your end?


I think we are trying to organize a 405x users group, I am talking with a few 
other guys.


Cheers,


Randy



From: cctalk  on behalf of Mike Haas 

Sent: Thursday, October 27, 2016 8:10 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Tek 40xx computer users

Congrats on your new Tek.My 4051 pile came from came indirectly from
Gary Spence, who had inhouse involvement with the model. (can't locate his
bio at the moment)  Here's what I got... somewhere:

4051, 2x 4907 Dual 8" floppys, and the "System Test Fixture" front panel, a
box of DC300 tapes
"GAS 6800"  - a Homebrew 4051  (maybe a prototype   4051  ???)

and  these paks:

RS232 I/O compak
dual port memorypack
UNIBURN EPROM burner pack
VIDEOFRAME digitizer
GPIB Enhancement rompack
RS232 Printer Interface
Parallel Interface
Rompack Switch
Data Communications Interface
8k Rom pack
Addressable Data Tracking backpack
IC Analyzer
Editor Pack
Filemanager Pack
Binary Program Loader Pack
Signal Processor Pack
Service Pack
Pack extender board
a few empty packs and several wired edges



On Sun, Oct 23, 2016 at 10:15 PM, Randy Dawson 
wrote:

> I bought the Tek 4051 on ebay today; Jason brought it to my house and it
> works perfectly, with about a half hour of programming instruction my 12
> old daughter was plotting a cat face.
>
>
> https://www.facebook.com/Thelma.Franco/videos/10154277153852670/
Log In or Sign Up to 
View
www.facebook.com
See posts, photos and more on Facebook.


>
>
> I would like to get in touch with other users of this first personal
> computer, and find additional resources.
>
>
> Do you know where I can find an archive of BASIC programs for this?
>
>
> Has anybody built plug in cards in the back, mine came with a realtime
> clock and a "file manager", I do not know what that one does.
>
>
> I have some Tek scopes with IEE-488, and I will see if I can get the IEEE
> interface working.
>
>
> There was a DC300 tape in the machine:
>
>
> biorithm
>
> craps
>
> blackjack
>
> artillery
>
> tanks
>
> weatherwar
>
>
> The belt is broken in the tape, I have ordered some new DC300's and will
> transplant the tape.
>
>
> Any resources will be welcome!
>
>
> Randy
>
>
>
>
>

Re: DEC H960 stabiliser feet. Have some questions.

[Chuck Guzis via cctalk]

On 01/06/2018 06:07 PM, Pete Turnbull via cctalk wrote:
> On 07/01/2018 01:44, Chuck Guzis via cctalk wrote:
>> On 01/06/2018 04:54 PM, Pete Turnbull via cctalk wrote:
>>
>>> No, as would be obvious to anyone looking carefully at the photo (or the
>>> real thing!), it's 1/4" x 20 UNC.  I really must learn to think before
>>> putting finger to keyboard.
>>
>> If it's "quarter-twenty", that's a size shared by many refrigerators and
>> other heavy household appliances.  I think I even have a few of those
>> mushroom-headed screws salvaged from one.
> 
> Except the proper screws are countersink head, not mushroom, because
> mushroom heads would prevent the kickplate being fitted (and the shank
> is 5/16" - only the end is threaded 1/4-20).

Ah, okay--I'm used to HP racks, which are a bit more traditional.

Well, there's always the ol' lathe...

--Chuck

Re: DEC H960 stabiliser feet. Have some questions.

[Pete Turnbull via cctalk]

On 07/01/2018 01:44, Chuck Guzis via cctalk wrote:

On 01/06/2018 04:54 PM, Pete Turnbull via cctalk wrote:


No, as would be obvious to anyone looking carefully at the photo (or the
real thing!), it's 1/4" x 20 UNC.  I really must learn to think before
putting finger to keyboard.


If it's "quarter-twenty", that's a size shared by many refrigerators and
other heavy household appliances.  I think I even have a few of those
mushroom-headed screws salvaged from one.


Except the proper screws are countersink head, not mushroom, because 
mushroom heads would prevent the kickplate being fitted (and the shank 
is 5/16" - only the end is threaded 1/4-20).


--
Pete
Pete Turnbull

Re: DEC H960 stabiliser feet. Have some questions.

[Chuck Guzis via cctalk]

On 01/06/2018 04:54 PM, Pete Turnbull via cctalk wrote:

> No, as would be obvious to anyone looking carefully at the photo (or the
> real thing!), it's 1/4" x 20 UNC.  I really must learn to think before
> putting finger to keyboard.

If it's "quarter-twenty", that's a size shared by many refrigerators and
other heavy household appliances.  I think I even have a few of those
mushroom-headed screws salvaged from one.

A visit to an appliance dealer might be in order.

--Chuck

Re: DEC H960 stabiliser feet. Have some questions.

[Pete Turnbull via cctalk]

Sigh.  Third time lucky.

On 06/01/2018 16:11, Pete Turnbull via cctalk wrote:


Correction - it's 10-32.   I found one of the screws, photo at
http://www.dunnington.cx/DEC/H960/kickplate/IMG_1006.JPG


No, as would be obvious to anyone looking carefully at the photo (or the 
real thing!), it's 1/4" x 20 UNC.  I really must learn to think before 
putting finger to keyboard.


--
Pete
Pete Turnbull

Re: To the 2901 bit slicers out there

[emanuel stiebler via cctalk]

On 2017-12-27 21:35, Randy Dawson via cctalk wrote:


What have you done, with microprogramming this part?  In your architecture,  
have you changed the microcode, create an instruction to enhance your machine?
I would be interested in any hardware projects, stories (or even in the FPGA, I 
hear its a popular thing to copy);


I hope you saw this one. Fresh on opencores:

https://opencores.org/project,am9080_cpu_based_on_microcoded_am29xx_bit-slices

cheers

Re: Spectre & Meltdown

[Chuck Guzis via cctalk]

On 01/06/2018 12:30 PM, Ken Seefried via cctalk wrote:

> The exploit effects the speculative execution facility, so no it's not
> "all P6 forward": nothing 32-bit or PAE, nothing just OOO, etc.  The
> current word I have (from my risk management folks, who got it from
> Intel) is the oldest chips verified to be affected are the Xeon 3400
> (server) and 2nd Gen Core (desktop) processors.  So, probably nothing
> later than 2009 or so.

Ken, I'm not sure I understand.  Do you mean nothing earlier than 2009
or so is affected?

--Chuck

Spare parts for VT1xx available.

[Mattis Lind via cctalk]

I was given three VT100 and one VT131 in not great condition.

The biggest problem is that the keyboards are missing approximately 25% of
the keys in average. For example all SETUP keys and NO SCROLL keys are
missing. God know why.

It makes little point for me try to find keytops for these four keyboards.
Besides they are not actually matching the terminals except for one of
them. Apparently the VT131 keyboard is slightly different from the VT100.
Then two of the VT100 has a different first ROM chip and also an extra char
gen chip (23-108E2 and 23-198E2). Seems to be some kind of European/
Swedish/Scandinavian chargen and keyboard layout. The keyboards I received
has US layout.

I checked two PSUs, one monitor board, and one basic video (logic board)
which seem to work OK. One keyboard tested and is working electrically.

The cases are from OK to in quite ugly shape and the CRTs are from minimal
screen burn to quite some screen burn (due to long time with inverse video).

Is there interest in a full terminal? Parts? Keytops? I will probably keep
one or two flyback transformers to keep the ones I have going.

I am in Sweden.

/Mattis

Re: Spectre & Meltdown

[Ken Seefried via cctalk]

From: Murray McCullough 
>
>This may be off-topic but these latest uprocessor exploits has raised
>a question: Are the 'old/classic' uprocessors using x86 technology in
>the same boat?
>

The exploit effects the speculative execution facility, so no it's not
"all P6 forward": nothing 32-bit or PAE, nothing just OOO, etc.  The
current word I have (from my risk management folks, who got it from
Intel) is the oldest chips verified to be affected are the Xeon 3400
(server) and 2nd Gen Core (desktop) processors.  So, probably nothing
later than 2009 or so.

KJ

Re: Info on Grid Systems 2260 Convertible Laptop/Tablet

[Dan Smith via cctalk]

Hey Alex,

 

I was trolling the internet and came across you post from 2015!!  I have a
GRiD 2260 in like new condition with all the attachments, software and
carrying case.  Are you interested?

 

Thanks,

 

Dan Smith

 

dansmithmaryl...@aol.com

410-841-4827

 

Re: DEC tape drives and cards

[Jon Elson via cctalk]

On 01/06/2018 04:51 AM, shad via cctech wrote:

Hello,
I have some doubt about DEC tape units and related interfaces.

What I know about (right or wrong, please correct):
- TU80 is a Pertec drive, it needs M7454 (unibus, TS11 driver) which is a
modified Dilog DU132. No option for QBUS.
Well, not from DEC.  I did have a Pertec T9000 (same as 
TU45) on my uVAX system, using an MDB MLSI-TM11 controller.
It emulated the DEC TM11, which was never available in a 
Q-bus version.  However, even with my limited VMS driver 
skills, I was pretty easily able to get the TM11 driver 
converted to work on Q-bus.


I also figured out how to set up a system so the 
non-volatile config memory could be accessed via the uVAX 
console monitor.


I do have source and .exe of that driver, but it is for a 
VMS 4.7 system.


Jon

Need keyboard for IBM 528x

[Camiel Vanderhoeven via cctalk]

The subject line says it allŠ

I have just been given an IBM 5285 Distributed Data System, together with a
5222 printer. It appears to work (it came with an 8² disk that contains some
user application, and the system can IPL off that disk, and brings up a
prompt requesting the current date and time), but I have no keyboard with
it. This brochure 
(http://bitsavers.informatik.uni-stuttgart.de/pdf/ibm/528x/G580-0274-00_5280
_Distributed_Data_System_Brochure.pdf) has a picture of the system and its
keyboard on the front page.

If anyone has one of these keyboards, please let me know!

Kind regards,

Camiel Vanderhoeven

DEC tape drives and cards

[shadoooo via cctalk]

Hello,
I have some doubt about DEC tape units and related interfaces.

What I know about (right or wrong, please correct):
- TU80 is a Pertec drive, it needs M7454 (unibus, TS11 driver) which is a
modified Dilog DU132. No option for QBUS.

- TS05 is a Pertec drive, it needs TSV05 (qbus, TSV05 driver) which is a
modified Emulex ???)

- TU81 plus is LESI or Pertec, you need KLESI (unibus / qbus, TMSCP driver).

Now the questions:
I have both a TU80 and TU81plus, and both Unibus and Qbus machines, but no
interfaces.
I would like to connect at least TU80 to unibus, and TU81 to qbus, but for
backup reasons it would be better to have both drives on both busses.

What are the DEC or third party card which would fit better on my drives,
and/or which would offer better driver compatibility with various OSs (via
switchable configuration).

I'm not sure about interface compatibility (Pertec interfaces could be
swapped),
and driver compatibility (what is better for RT11, what for BSD, what for
VMS).

I would accept also some offer to my email, if somebody has something
interesting to sell (better if in EU).

Thanks
Andrea

Re: non-PC Floppy imaging

[Guy Sotomayor Jr via cctalk]

> On Jan 6, 2018, at 2:42 AM, Dave Wade via cctalk  
> wrote:
> 
> 
> 
>> -Original Message-
>> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Jon Elson
>> via cctalk
>> Sent: 06 January 2018 02:50
>> To: Guy Sotomayor ; gene...@ezwind.net;
>> discuss...@ezwind.net:On-Topic and Off-Topic Posts
>> 
>> Subject: Re: non-PC Floppy imaging
>> 
>> On 01/05/2018 01:52 PM, Guy Sotomayor via cctalk wrote:
>>> Hi,
>>> 
>>> I now have a number of uCode diskettes for my IBM 4331.  I would
>> somehow like to image them so:
>>> a) I have backups in case the floppies themselves go bad
>>> b) be able to investigate their contents in case I have to “merge” the
>> contents of multiple floppies to
>>>  make a single good one
>>> 
>>> 
>> Any possibility the 4331 can write to a floppy?  I know next to nothing of 
>> this
>> hardware.  But, I know the VAX 11/780 really well. You could make copies of
>> its console floppy on that drive, once the OS was up.
>> 
> 
> Yes it can, it writes error log data to the floppy. It’s a pity most of the 
> operating guides to the 43xx boxes are lost which would be usefull as they 
> will have instructions on how to back up the diskettes,

I was reading that last night (as well as the CE being able to “patch” the 
uCode and save it on the floppy).

I have an entire FE cart (both sides) full of manuals for various parts of my 
4331 (and peripherals).  I haven’t looked through all of them (including 
various other manuals in a several foot long holder) to see if there’s an 
operating guide in there or not.

TTFN - Guy

Re: Large discs (Was: Spectre & Meltdown

[Alexander Schreiber via cctalk]

On Thu, Jan 04, 2018 at 06:38:10PM -0800, Fred Cisin via cctalk wrote:
> On Thu, 4 Jan 2018, TeoZ wrote:
> >Hard drives NEVER keep up. Bragging about how many DVD's (90's technology)
> >you can store on current HD means little to people who have ultra HD
> >Blueray videos that take up to 100GB of space. Heck even a single game
> >download can be 50GB these days.
> 
> I'd be interested in hearing about opinions of the 100GB "M-disc".  I've
> heard that they have decent longevity, and, the "low" capacity ones are
> interchangeable with conventional DVDs.

I've recently turned to using 25 & 100 GB M-disc BD discs for archival
storage (mostly my digital camera image archive, so data that doesn't
change). One downside of the 100 GB ones: they forever to write (with
the defaults on growisofs, IIRC ~3h or so).
 
> I can still put 20 100GB DVDs (2017 technology) on a 2TB 2.5" Thin SATA.
> However, I'm also looking for multi-terabyte storage.
> Are higher capacity DVDs on their way?
> Howzbout multi-TearByte SSDs?

I wouldn't trust SSDs (or any flash based storage) for archival purposes,
those are strictly for online storage.

Kind regards,
   Alex.
-- 
"Opportunity is missed by most people because it is dressed in overalls and
 looks like work."  -- Thomas A. Edison

Re: DEC H960 stabiliser feet. Have some questions.

[Pete Turnbull via cctalk]

On 06/01/2018 15:45, Pete Turnbull via cctalk wrote:

On 06/01/2018 12:04, Steve Malikoff via cctalk wrote:
Using the measurements provided by Vince I've rejigged the drawing a 
bit and it ought to be closer.


Looks good to me except...

I had thought the hole in the front corner of the H960 was for a front 
panel pivot, but it seems the foot does actually use it.


Yes, that's essential!  But unlike in your drawing, the large screw that 
holds the stabiliser foot into that hole is a large-head countersunk 
screw, not a pan-head screw, and only the very bottom part of it is 
threaded, 8-32 IIRC.


Correction - it's 10-32.   I found one of the screws, photo at
http://www.dunnington.cx/DEC/H960/kickplate/IMG_1006.JPG

The head diameter is 15.9mm (5/8")
It's a 45 degree countersink with a flattened underside
The shank diameter is 7.9mm (5/16") and 49mm long
The threaded portion is 15mm long x 10-32
The overall length is 66.7mm (2-5/8")

--
Pete
Pete Turnbull

Re: DEC H960 stabiliser feet. Have some questions.

[Pete Turnbull via cctalk]

On 06/01/2018 12:04, Steve Malikoff via cctalk wrote:

Using the measurements provided by Vince I've rejigged the drawing a bit and it 
ought to be closer.


Looks good to me except...


I had thought the hole in the front corner of the H960 was for a front panel 
pivot, but it seems the foot
does actually use it.


Yes, that's essential!  But unlike in your drawing, the large screw that 
holds the stabiliser foot into that hole is a large-head countersunk 
screw, not a pan-head screw, and only the very bottom part of it is 
threaded, 8-32 IIRC.  The main part is a plain shank to fit the holes 
for the front panel pivot and also the holes in the stabiliser; only the 
part protruding below the stabiliser is threaded.  It's fitted with a 
shakeproof ("star") washer along with the nut, under the stabiliser.  I 
took all the stabilisers off my racks because they're superfluous in my 
setup, and I can't remember where I put them, so I can't double-check.



I don't have the kickplate nor access to measuring one, so that probably 
changes it a bit too.


That I do have, so I took it off one of the racks and you'll find some 
(poor quality, from a phone that doesn't do close focus very well) 
pictures at


http://www.dunnington.cx/DEC/H960/kickplate/IMG_0999.JPG
http://www.dunnington.cx/DEC/H960/kickplate/IMG_1000.JPG
http://www.dunnington.cx/DEC/H960/kickplate/IMG_1001.JPG
http://www.dunnington.cx/DEC/H960/kickplate/IMG_1002.JPG
http://www.dunnington.cx/DEC/H960/kickplate/IMG_1003.JPG

and a hastily drawn sketch of the dimensions at
http://www.dunnington.cx/DEC/H960/kickplate/kickplate.pdf
(NB This is a sketch, not a technical drawing, and is only approximately 
to scale).


--
Pete
Pete Turnbull

Re: OT - Starting IT Training

[systems_glitch via cctalk]

CCNA is indeed a worthwhile program, not only for the piece of paper.

Good luck!

Thanks,
Jonathan

On Sat, Jan 6, 2018 at 1:10 AM, Adrian Stoness via cctalk <
cctalk@classiccmp.org> wrote:

> dude go after ur cicsco way better pay
>
> On Sat, Jan 6, 2018 at 12:06 AM, Kip Koon - The Computer Doc via cctalk <
> cctalk@classiccmp.org> wrote:
>
> > Hi My Friends,
> >
> > Just a quick message to let everybody know that I am starting IT Training
> > Monday, January 8, 2018 to get the certifications I need.  When finished
> I
> > plan to have my A+, N+ and S+ certifications.  For those unfamiliar with
> > these certifications, this is paper work proving I have the knowledge to
> > perform the tasks of a Computer, Network and Server Technician in that
> > order.  These enable me to get the great jobs in IT that I am looking
> for.
> > That is my plan.  Please keep me in your prayers.  This will be a lot of
> > work, reading, labs etcetera.  In December 2018, I ought to be getting a
> > great Christmas present!  :D
> >
> > I will be checking my email when I can.  Take care my friends.
> >
> >
>

Re: DEC H960 stabiliser feet. Have some questions.

[Steve Malikoff via cctalk]

Using the measurements provided by Vince I've rejigged the drawing a bit and it 
ought to be closer.
I hope this shows what was meant by the angled corner part, seems logical to 
have it like that.
The radii 'too small to measure' without a gauge was entered as 1/16" and it 
looks acceptable.

Basic layout, no measurements just a cm/inch scale:

http://web.aanet.com.au/~malikoff/pdp11/DEC_H960_stabiliser_foot_left_A-H952-BA_revision_2.jpg

Measurements (my CAD program converts everything to metric, when I entered in 
Vince's measurements):

http://web.aanet.com.au/~malikoff/pdp11/DEC_H960_stabiliser_foot_left_A-H952-BA_revision_2_dimensioned.jpg

How it might look, so far, attached to the H960 (no kickplate):

http://web.aanet.com.au/~malikoff/pdp11/DEC_H960_stabiliser_foot_left_A-H952-BA_revision_2_placed.jpg

I had thought the hole in the front corner of the H960 was for a front panel 
pivot, but it seems the foot
does actually use it.

I don't have the kickplate nor access to measuring one, so that probably 
changes it a bit too.

Steve.

RE: non-PC Floppy imaging

[Dave Wade via cctalk]

> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Jon Elson
> via cctalk
> Sent: 06 January 2018 02:50
> To: Guy Sotomayor ; gene...@ezwind.net;
> discuss...@ezwind.net:On-Topic and Off-Topic Posts
> 
> Subject: Re: non-PC Floppy imaging
> 
> On 01/05/2018 01:52 PM, Guy Sotomayor via cctalk wrote:
> > Hi,
> >
> > I now have a number of uCode diskettes for my IBM 4331.  I would
> somehow like to image them so:
> > a) I have backups in case the floppies themselves go bad
> > b) be able to investigate their contents in case I have to “merge” the
> contents of multiple floppies to
> >   make a single good one
> >
> >
> Any possibility the 4331 can write to a floppy?  I know next to nothing of 
> this
> hardware.  But, I know the VAX 11/780 really well. You could make copies of
> its console floppy on that drive, once the OS was up.
> 

Yes it can, it writes error log data to the floppy. It’s a pity most of the 
operating guides to the 43xx boxes are lost which would be usefull as they will 
have instructions on how to back up the diskettes,

> Jon

Dave