Re: Could somebody please help me identify this board?

2016-12-09 Thread Chris Pye 
>> 
> Hey, just checking - I think the puzzle has already been solved twice. I 
> mentioned that I was pretty sure it's a Compugraphics board, and someone else 
> said the same thing a few days later, but neither of those posts received any 
> replies.
> 
> 
> Cheers,
> 
> Mike
> 

I guessing that is correct, but still have no idea what system it was intended 
for.

Re: Could somebody please help me identify this board?

2016-12-08 Thread Mike van Bokhoven 

On 9/12/2016 10:17 a.m., Jon Elson wrote:


On 12/07/2016 10:31 PM, Eric Smith wrote:

On Wed, Dec 7, 2016 at 9:28 PM, Eric Smith  wrote:


Given that it's extended length anyhow, and thus not compliant with the
bus spec, it doesn't really matter which side of the board the 
components

are on, other than it precludes use in some backplane slots. I may have
been designed that way to fit in a specific slot in a specific machine.

On the other hand, the pin count on the wider edge connector is 100 
rather

than 86 so not Multibus.


OK,better eyes solve the puzzle!

Jon


Hey, just checking - I think the puzzle has already been solved twice. I 
mentioned that I was pretty sure it's a Compugraphics board, and someone 
else said the same thing a few days later, but neither of those posts 
received any replies.



Cheers,

Mike

Re: Could somebody please help me identify this board?

2016-12-08 Thread Jon Elson 


On 12/07/2016 10:31 PM, Eric Smith wrote:

On Wed, Dec 7, 2016 at 9:28 PM, Eric Smith  wrote:


Given that it's extended length anyhow, and thus not compliant with the
bus spec, it doesn't really matter which side of the board the components
are on, other than it precludes use in some backplane slots. I may have
been designed that way to fit in a specific slot in a specific machine.


On the other hand, the pin count on the wider edge connector is 100 rather
than 86 so not Multibus.


OK,better eyes solve the puzzle!

Jon

Re: Could somebody please help me identify this board?

2016-12-07 Thread Eric Smith 
On Wed, Dec 7, 2016 at 9:28 PM, Eric Smith  wrote:

> Given that it's extended length anyhow, and thus not compliant with the
> bus spec, it doesn't really matter which side of the board the components
> are on, other than it precludes use in some backplane slots. I may have
> been designed that way to fit in a specific slot in a specific machine.
>

On the other hand, the pin count on the wider edge connector is 100 rather
than 86 so not Multibus.

Re: Could somebody please help me identify this board?

2016-12-07 Thread Eric Smith 
On Wed, Dec 7, 2016 at 5:34 PM, Michael Thompson <
michael.99.thomp...@gmail.com> wrote:

> > Extended-length Multibus.  Definitely not Multibus II, which uses
> Eurocard
> > 6Ux220 form factor with two 96-pin DIN 41612 connectors.
>
> The components are on the wrong side of the board for a Multibus.
>

Given that it's extended length anyhow, and thus not compliant with the bus
spec, it doesn't really matter which side of the board the components are
on, other than it precludes use in some backplane slots. I may have been
designed that way to fit in a specific slot in a specific machine.

Re: Could somebody please help me identify this board?

2016-12-07 Thread Michael Thompson 
>
> Date: Tue, 6 Dec 2016 22:57:08 -0700
> From: Eric Smith 
> Subject: Re: Could somebody please help me identify this board?
>
> On Tue, Dec 6, 2016 at 7:32 PM, Jon Elson  wrote:
>
> > It appears to be an extended-length Multibus II board with 2 8-bit DACs
> on
> > it.  Output for an XY scope?
> >
>
> Extended-length Multibus.  Definitely not Multibus II, which uses Eurocard
> 6Ux220 form factor with two 96-pin DIN 41612 connectors.
>

The components are on the wrong side of the board for a Multibus.

If I remember correctly, DY 4 Systems, now part of Curtiss-Wright, made
extended depth Multibus boards.

Michael Thompson

Re: Could somebody please help me identify this board?

2016-12-07 Thread Ken Seefried 
From: Jon Elson 
> It appears to be an extended-length Multibus II board

No.  Multibus II used DIN connectors.

KJ

Re: Could somebody please help me identify this board?

2016-12-07 Thread Mike Niswonger 
The "CG" logo on the corner appears to be one of the many Compugraphic 
logos.


Possibly a a board from a custom phototypesetter that drove a CRT to 
expose the photomask (film)?




On 12/06/2016 06:57 PM, Chris Pye wrote:

I’m moving my collection and found this board amongst some others.

https://drive.google.com/open?id=0B0m4VYF4tIU5aXJMSHBwUDJMUWM 


Cheers,
Chris

Re: Could somebody please help me identify this board?

2016-12-06 Thread Eric Smith 
On Tue, Dec 6, 2016 at 7:32 PM, Jon Elson  wrote:

> It appears to be an extended-length Multibus II board with 2 8-bit DACs on
> it.  Output for an XY scope?
>

Extended-length Multibus.  Definitely not Multibus II, which uses Eurocard
6Ux220 form factor with two 96-pin DIN 41612 connectors.

Re: Could somebody please help me identify this board?

2016-12-06 Thread Mike van Bokhoven 

On 7/12/2016 1:57 p.m., Chris Pye wrote:

I’m moving my collection and found this board amongst some others.

https://drive.google.com/open?id=0B0m4VYF4tIU5aXJMSHBwUDJMUWM 


Cheers,
Chris


It's a Compugraphics board of some sort, I think. Couple of AD or DAs, 
etc. I know nothing about these, just recognised the logo.



Cheers - Mike

Re: Could somebody please help me identify this board?

2016-12-06 Thread Chris Pye 

> On 7 Dec 2016, at 12:32 pm, Jon Elson  wrote:
> 
> 
> On 12/06/2016 06:57 PM, Chris Pye wrote:
>> I’m moving my collection and found this board amongst some others.
>> 
>> https://drive.google.com/open?id=0B0m4VYF4tIU5aXJMSHBwUDJMUWM 
>> 
>> 
>> Cheers,
>> Chris
> It appears to be an extended-length Multibus II board with 2 8-bit DACs on 
> it.  Output for an XY scope?
> 
> Jon

Thanks Jon

If anybody wants it, they can have it for cost of postage. I am in Brisbane 
Australia, so it’s probably going to be costly outside AU..

Re: Could somebody please help me identify this board?

2016-12-06 Thread Jon Elson 


On 12/06/2016 06:57 PM, Chris Pye wrote:

I’m moving my collection and found this board amongst some others.

https://drive.google.com/open?id=0B0m4VYF4tIU5aXJMSHBwUDJMUWM 


Cheers,
Chris
It appears to be an extended-length Multibus II board with 2 8-bit DACs 
on it.  Output for an XY scope?


Jon

Could somebody please help me identify this board?

2016-12-06 Thread Chris Pye 
I’m moving my collection and found this board amongst some others.

https://drive.google.com/open?id=0B0m4VYF4tIU5aXJMSHBwUDJMUWM 


Cheers,
Chris