[Coco] Clud9 512K upgrade for the Coco3

[Allen Huffman]

On Jan 29, 2015, at 5:18 PM, Arthur Flexser <flexser at fiu.edu> wrote:
> 
> That's too simple to work, Allen.  The problem is that $1FFFF ghosts to
> $7FFFF (along with $3FFFF and $5FFFF), so even a 128K CoCo 3 would pass
> that test.
> 
> You have to do something like poke $1FFFF and verify that the contents of
> $7FFFF have NOT changed to see if 512K is there.

That's good to know. I wondered what would show up on a 128K machine. I figured it would return 0 or 255. Ghosting. Cool.