Re: ISO: DECtape controller

[Al Kossow via cctalk]

Anders Sandal has been working on modern replacements

http://www.vcfed.org/forum/showthread.php?63589-DEC-power-supply-725-going-hot-in-TU56H=g888

On 5/15/18 11:35 PM, Josh Dersch via cctalk wrote:
> I was fortunate enough to acquire a TU56 this week, along with a TD8E 
> controller.  However, the TU56 lacks the G888
> flip-chips necessary to work with the TD8E; I know these parts are in short 
> supply, but in the unlikely event that
> anyone has (a) a set of 5 G888 boards, or (b) a TC01, TC08 or TC11 DECtape 
> controller in any condition that they would
> be interested in selling/trading for, please drop me a line.
> 
> Thanks as always!
> 
> Josh
> 

Re: ISO: DECtape controller

[Mattis Lind via cctalk]

2018-05-16 13:08 GMT+02:00 Noel Chiappa via cctalk :

> > From: Josh Dersch
>
> > the TU56 lacks the G888 flip-chips necessary to work with the TD8E; I
> > know these parts are in short supply, but in the unlikely event that
> > anyone has (a) a set of 5 G888 boards,
>
> I have this memory that someone in Scandanavia is well along with the
> process
> of creating new G888's. (If I should not have let that cat out of the bag,
> my apologies.)
>

I can jump in here since I have been  a bit involved in this. Anders (
http://www.pdp-9.net/) designed a modern replacement for the G888. I tested
it in my TC11 + TU56 and it mostly worked fine, except for in the far end
of the tape where it performed worse than an original G888. It worked fine
for booting RT-11 and XXDP but when you run the TC11 diagnostics it will
give some errors while the original is error free.

Anders is in the process of  setting up a TU56 together with a TD8E right
now to continue with this work to design a new card.

I think all this is quite official since Anders has posted this thread on
vcfed.org:
http://www.vcfed.org/forum/showthread.php?63589-DEC-power-supply-725-going-hot-in-TU56H

/Mattis



> Noel
>

Re: ISO: DECtape controller

[Noel Chiappa via cctalk]

> From: Josh Dersch

> the TU56 lacks the G888 flip-chips necessary to work with the TD8E; I
> know these parts are in short supply, but in the unlikely event that
> anyone has (a) a set of 5 G888 boards,

I have this memory that someone in Scandanavia is well along with the process
of creating new G888's. (If I should not have let that cat out of the bag,
my apologies.)

Noel

Re: ISO: DECtape controller

[Paul Anderson via cctalk]

Hi Pete,

If the TU56 is ever in your way, I'm interested.

Thanks, Paul

On Wed, May 16, 2018 at 1:58 AM, Pete Turnbull via cctalk <
cctalk@classiccmp.org> wrote:

> On 16 May 2018, at 08:37, Josh Dersch via cctalk 
> wrote:
>
> >I was fortunate enough to acquire a TU56 this week, along with a TD8E
> controller.  However, the TU56 lacks the G888 flip-chips necessary to work
> with the TD8E; I know these parts are in short supply, but in the unlikely
> event that anyone has (a) a set of 5 G888 boards, or (b) a TC01, TC08 or
> TC11 DECtape controller in any condition that they would be interested in
> selling/trading for, please drop me a line. Thanks as always! Josh
>
> I have a similar problem. Has anyone re-engineered the G888?

Re: ISO: DECtape controller

[Pete Turnbull via cctalk]

On 16 May 2018, at 08:37, Josh Dersch via cctalk  wrote:

>I was fortunate enough to acquire a TU56 this week, along with a TD8E 
>controller.  However, the TU56 lacks the G888 flip-chips necessary to work 
>with the TD8E; I know these parts are in short supply, but in the unlikely 
>event that anyone has (a) a set of 5 G888 boards, or (b) a TC01, TC08 or TC11 
>DECtape controller in any condition that they would be interested in 
>selling/trading for, please drop me a line. Thanks as always! Josh 

I have a similar problem. Has anyone re-engineered the G888?

ISO: DECtape controller

[Josh Dersch via cctalk]

I was fortunate enough to acquire a TU56 this week, along with a TD8E 
controller.  However, the TU56 lacks the G888 flip-chips necessary to 
work with the TD8E; I know these parts are in short supply, but in the 
unlikely event that anyone has (a) a set of 5 G888 boards, or (b) a 
TC01, TC08 or TC11 DECtape controller in any condition that they would 
be interested in selling/trading for, please drop me a line.


Thanks as always!

Josh