[Coco] Controller question

jdaggett at gate.net jdaggett at gate.net
Wed Aug 29 18:36:07 EDT 2012


On 29 Aug 2012 at 16:59, Keith Clark wrote:

> 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.

Keith

The use of the WD1773 predates the Coco3. More like late Coco1 and Coco2 switched from 
the WD1793 to the WD1773 probably as a cost reduction as the board is smaller and there is 
a smaller chip count. Also the need for timing adjustments. The original controller needed a 
oscope to properly setup.

james



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