[Coco] 80 column pak prototype

[Mark Marlette]

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