[Coco] CoCo RGB video timing and levels

[Benoit Bleau]

> 
> To measure it more accurately, you would use a good 
> oscilloscope.  If you don't have one, I'd suggest you get one 
> before getting too deep into this project.  Hit a local Ham 
> Fest or haunt eBay.  There are Oriental knockoffs of 
> name-brand scopes that are pretty good bang for the buck.  --Mike K.
> 
How about this one?  Sounds pretty decent
http://www.surplusshed.com/pages/item/r1456.html 

-Ben