[Coco] 80 column pak prototype

[Mark Marlette]

Louis,

Mr. Google doesn't know all but is pretty good. :)

Glad you found it!

Tandy should have buffered the address anyway. I buffered that and the IRQs, R/W. etc.....Nice to be safer.

Regards,

Mark




________________________________
 From: Louis Ciotti <lciotti1 at gmail.com>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com> 
Sent: Wednesday, October 23, 2013 9:17 AM
Subject: Re: [Coco] 80 column pak prototype
 

Yea had an itchy trigger finger on asking about it.  needed to add to my
search terms.


On Wed, Oct 23, 2013 at 10:04 AM, Luis Antoniosi (CoCoDemus) <
retrocanada76 at gmail.com> wrote:

> Your google is broken:
>
> http://www.frontiernet.net/~mmarlette/Cloud-9/Hardware/Pro-TectorPlus.html
>
>
> On Wed, Oct 23, 2013 at 9:59 AM, Louis Ciotti <lciotti1 at gmail.com> wrote:
>
> > Mark,
> >
> > I assume the Pro-Tector+ is something waaayyy out of production...  Mr.
> > Google did not show anything
> >
> >
> > On Wed, Oct 23, 2013 at 8:59 AM, Mark Marlette <
> mmarlette at frontiernet.net
> > >wrote:
> >
> > > Luis,
> > >
> > > Fun stuff!
> > >
> > > On the note of strange characters. As it appears that these
> proto-boards
> > > are a good thing, they are not good for digital design at MHZ rates.
> > >
> > > The CoCo's address bus is not buffered, unless you have a Pro-Tector+,
> so
> > > just driving through the ribbon cable to your board will be degraded.
> My
> > > tests shown ~3-4" was max, YMMV.
> > >
> > > The proto-board adds capacitance to every point, some cases that is
> good,
> > > most cases it is not.
> > >
> > > So your circuit can be wired electrically correct and it still will not
> > > work just by how you physically built it. That is not to say you don't
> > have
> > > a wiring issue. :)
> > >
> > > Generally it is cheaper and will yeild better results to have a board
> > made.
> > >
> > > My $0.02.
> > >
> > > Any case, enjoy and continue your great work on the software and
> > hardware!
> > >
> > > 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: Wednesday, October 23, 2013 6:52 AM
> > > Subject: [Coco] 80 column pak prototype
> > >
> > >
> > > Hi all,
> > >
> > > Having all the components at hand I started prototyping yesterday:
> > >
> > > pic.twitter.com/aAnpm39NwL <http://t.co/aAnpm39NwL>
> > >
> > > One hour later:
> > >
> > > pic.twitter.com/dOEpz5Y91K <http://t.co/dOEpz5Y91K>
> > >
> > > And turning this thing on:
> > >
> > > pic.twitter.com/rl4fNtssfa <http://t.co/rl4fNtssfa>
> > >
> > > You can see some characters are strange, I must have swapped a bit in
> the
> > > data bus or something. It was too late yesterday to troubeshooting but
> > HEY
> > > IT WORKS!
> > >
> > > Those protoboard jumpers are really helpful. :)
> > >
> > > --
> > > Long live the CoCo
> > >
> > > --
> > > Coco mailing list
> > > Coco at maltedmedia.com
> > > http://five.pairlist.net/mailman/listinfo/coco
> > >
> > > --
> > > Coco mailing list
> > > Coco at maltedmedia.com
> > > http://five.pairlist.net/mailman/listinfo/coco
> > >
> >
> > --
> > Coco mailing list
> > Coco at maltedmedia.com
> > http://five.pairlist.net/mailman/listinfo/coco

> >
>
>
>
> --
> Long live the CoCo
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco
>

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