[Coco] SAMx8: Dragon 64 512K expansion

[Ciaran Anscomb]

Ciaran Anscomb via Coco wrote:
> Website here: https://www.6809.org.uk/dragon/samx8/
> with manual here: https://www.6809.org.uk/dragon/samx8/doc/samx8.pdf
> 
> The page mapping is course, but I'm thinking that having the COMMON
> flag register fix the top 8K in place, it may just be a reasonable fit
> for Fuzix.

And here's an annoyingly-oriented video of just that:

https://www.youtube.com/shorts/WGGKEBfRt3I

..ciaran