[Coco] New video from Cloud-9!

Tue Apr 9 21:25:33 EDT 2013

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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