[Coco] New video from Cloud-9!

Wed Apr 10 12:30:40 EDT 2013

Bill,

If you want to have more than 512k, that will have to come from the SB board or Disto's upgrades.

Now you could hack the TRAID, make your own DAT board. Tony D. did that many years ago...

Regards,

Mark
http://www.cloud9tech.com

________________________________
 From: Bill Pierce <ooogalapasooo at aol.com>
To: coco at maltedmedia.com 
Sent: Tuesday, April 9, 2013 8:41 PM
Subject: Re: [Coco] New video from Cloud-9!

Mark, you are probably right. It was most likely a cap. I just remember that 25 years ago I had to cut something :-)   (I'm not a HW techie)
It was a real painless upgrade considering I once had one of those 8 chip 16k Coco 2s that brought fear into the hearts of people like Marty Goodman when discussing 64k upgrades for Coco 2s. I never did upgrade it. I bought a 64k machine instead :-)

By the way, AWSOME job on the 512k upgrade. This has been needed for all those 128k machines everyone is picking up on e-bay and yardsales.

I really do wish you would reconsider doing the 1-2meg upgrades. I know they're a pain. Mine has the Disto 1 megger and I would've hated to be the one installing that. Soldering directly to the 6809 makes me shiver.

Seems like there should be a way to create a "socket" for the 6809 something similar to "The Protector" that would allow you to run the needed lines to the CPU without doing the direct solder bit?
Probably not cost effective, but when is keeping up a 57 Chevy cost effective? :-)

Bill Pierce
My Music from the Tandy/Radio Shack Color Computer 2 & 3
https://sites.google.com/site/dabarnstudio/
Co-Webmaster of The TRS-80 Color Computer Archive
http://www.colorcomputerarchive.com/
Co-Contributor, Co-Editor for CocoPedia
http://www.cocopedia.com/wiki/index.php/Main_Page
E-Mail: ooogalapasooo at aol.com

-----Original Message-----
From: Mark Marlette <mmarlette at frontiernet.net>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Sent: Tue, Apr 9, 2013 9:25 pm
Subject: Re: [Coco] New video from Cloud-9!

Bill,

Not sure what resistor you are talking about. Doesn't make sense. Now if you are 
talking a cap then that is true with C-9 product as well.

The resistor are series resistors on the GIME. So if you disconnect it....You 
are done, the CoCo will never boot. C65 and C66 caps are terrible in a digital 
design. Not sure why there ever was a cap on RAS. Maybe a compliance issue with 
the FCC?? In any case adding analog components to a digital circuit is not 
recommended, IMHO. There are reasons for what was done. The SRAM doesn't need 
them. Slowing(ramping) the RAS clock edge to the 200+MHZ Altera CPLD...it just 
doesn't like it.

We have noted a side effect of the TRIAD, since there is not a .5amp power drain 
on the power supply. If you turn the coco on / off, like you have for 30 years 
now...You will see an OK. On the screen...... :) CTL/ALT RESET works better..... 
There is just not enough bleed on the CoCo's PS anymore to drain it. :)

Heck modify the ROMs to make it think it is a 128k machine. :) Maybe there is a 
RAM poke. Don't know ATM.

Regards,

Mark
http://www.cloud9tech.com

________________________________
From: Bill Pierce <ooogalapasooo at aol.com>
To: coco at maltedmedia.com 
Sent: Tuesday, April 9, 2013 6:33 PM
Subject: Re: [Coco] New video from Cloud-9!

With the old Performance Peripherals 512k upgrde, only one resistor is cut, the 
old memory is pulled out (socketed) and the unit just plugs in. So going back to 
128K would be a ,matter of pulling the unit, connecting that resistor and 
replacing the memory chips. I have 2 of these units in old Cocos I hope to 
revive one day

Bill Pierce
My Music from the Tandy/Radio Shack Color Computer 2 & 3
https://sites.google.com/site/dabarnstudio/
Co-Webmaster of The TRS-80 Color Computer Archive
http://www.colorcomputerarchive.com/
Co-Contributor, Co-Editor for CocoPedia
http://www.cocopedia.com/wiki/index.php/Main_Page
E-Mail: ooogalapasooo at aol.com

-----Original Message-----
From: Arthur Flexser <flexser at fiu.edu>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Sent: Tue, Apr 9, 2013 6:29 pm
Subject: Re: [Coco] New video from Cloud-9!

I think Luis is saying he'd like to have the ability to switch his 512K
CoCo 3 into a mode appropriate for testing software to see if it runs okay
on a 128K machine.  Easier said than done, I suspect;  better to have
somebody with a 128K CoCo test it.

Art

On Tue, Apr 9, 2013 at 6:20 PM, Mark Marlette <mmarlette at frontiernet.net>wrote:

> Luis,
>
> Sorry don't follow. :(
>
>
> Regards,
>
> Mark
>
>
>
> ________________________________
>  From: Luis Fernández <luis46coco at hotmail.com>
> To: COCO <coco at maltedmedia.com>
> Sent: Tuesday, April 9, 2013 4:45 PM
> Subject: Re: [Coco] New video from Cloud-9!
>
> I meant to use the computer to test software, and how it behaves under 128
> or 512
> a kind of switch
>
> > Date: Tue, 9 Apr 2013 13:39:26 -0700
> > From: mmarlette at frontiernet.net
> > To: coco at maltedmedia.com
> > Subject: Re: [Coco] New video from Cloud-9!
> >
> > Luis,
> >
> > Memory tests 512k anything less than that will be a failure.
> >
> > Regards,
> >
> > Mark
> >
> >
> >
> >
> > ________________________________
> >  From: Luis Fernández <luis46coco at hotmail.com>
> > To: COCO <coco at maltedmedia.com>
> > Sent: Tuesday, April 9, 2013 12:25 PM
> > Subject: Re: [Coco] New video from Cloud-9!
> >
> > There is possibility to switch 128-512 to test?
> >
> >
> > > Date: Tue, 9 Apr 2013 10:47:01 -0700
> > > From: mmarlette at frontiernet.net
> > > To: coco at maltedmedia.com
> > > Subject: Re: [Coco] New video from Cloud-9!
> > >
> > > Luis,
> > >
> > > Correct and the length of CN4-6 legs won't bottom out and short to the
> traces that run under the connectors. Another common problem of other
> memory upgrades.
> > >
> > > Regards,
> > >
> > > Mark
> > > http://www.cloud9tech.com
> > >
> > >
> > >
> > >
> > > ________________________________
> > >  From: Luis Antoniosi (CoCoDemus) <retrocanada76 at gmail.com>
> > > To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> > > Sent: Tuesday, April 9, 2013 12:25 PM
> > > Subject: Re: [Coco] New video from Cloud-9!
> > >
> > > Interesting to say about TRIAD is that its shape solves and old
> problem of
> > > the stupid capacitor touching its metal tip on the older memory boards
> and
> > > causing short cirtcuits. :)
> > >
> > > --
> > > Coco mailing list
> > > Coco at maltedmedia.com
> > > http://five.pairlist.net/mailman/listinfo/coco
> > >
> > > --
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> > > Coco at maltedmedia.com
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> >
> >
> > --
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> >
> > --
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>
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