[Coco] Controller question

[Keith Clark]

I found the following here, 
http://forums.bannister.org/ubbthreads.php?ubb=showflat&Number=61579&page=6&PHPSESSID=53459e1fdeb0580d09e07a652111ea0f:

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The original Color Computer floppy controller used a WD1793. The Coco3 
dropped the 12v supply and the controller switched to the WD1773 as it 
just needed 5v.
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On 12-08-29 04:52 PM, jdaggett at gate.net wrote:
> bill
>
> Not really sure. It does not look like my FD501 or FD502 controllers. FD500? I always
> thought the FD500 was the large controller that used the WD1793 chip. Looking at the date
> codes on some of the chips, it is the time frame of the FD501. Could there have been
> multiple versions of the FD501? I am not sure on that at all. Looking at the date codes on the
> chips this could not have been built before the 32nd week  of 1984. That would put it in the
> FD501 era used on the Coco2. My FD502 all has 1987 date codes.
>
> james
>
> On 29 Aug 2012 at 15:46, Bill wrote:
>
>> AFTER I had sold both my Cocos, I ran across a drive controller in a plain
>> case that I cannot identify. Can anyone tell by this picture what it is?
>>
>>   
>>
>> http://www.sq1bbs.com/controller.jpg
>>
>>   
>>
>> Thanks
>>
>>
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>>
>>
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>
>
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