[Coco] Possible Coco patent?

[Frank Swygert]

I bet the answer is "none of the above" (none of your guesses). Even the CoCo closely followed Motorola's example computer layout in the 6809 data sheet. Probably coincidence that the person picked a 6809 as a controller, then they followed the Motorola recommended circuit to finish it out. 

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Date: Sun, 21 Sep 2008 09:23:16 -0400
From: Aaron Banerjee <spam_proof at verizon.net>

I stumbled upon US Patent # 5,572,705 while searching for something  
entirely different.  I'm trying to guess if they used an old coco  
(with additions) in constructing this device.  It's got a 6809E and a  
6821 PIA.   The patent may be viewed for free at the US Patent and  
Trademark Office website <http://www.uspto.gov> under the "patents"  
section.  It is most easily found by doing a "patent number search".

I was wondering what others thought of this patent:

1.  Souped-up coco?
2.  Not a coco, but the inventor was familiar with coco and used  
similar parts for his invention?
3.  Mere coincidence?

-- 
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
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