[Coco] 513K Memory Board questions?

[Robert Gault]

There are some test programs on Paul Barton's web site that I wrote for 
testing extended memory up to 8Megs. They should work with a 512K board.
http://home.wwdb.org/irgroup/8mbdet.html#downloads

Jim Cox wrote:

> Can some one out there please refresh my memory as to what needs to be 
> done to an US CoCo 3 to allow the installation of a 512K Memory Board?
> 
> I know that the 4 orginal RAM chips need to be removed, but what are the 
> numbers of the two caps?
> 
> Also, what are some ways of testing to see if the 512K boards are working?
> 
> Thanks!
> 
> Jim Cox
>