first of all: I love this project !
second: the Pictures of the prototype are amazing !!! But...
...unfortunately, some people believe (not me) that the C65 you are showing is actually a real one, not your prototype, so i think it would be helpfull to show the people the nexys & widgetboard inside as well.
Now to my main question:
gathering all the available information together. The Original C65 was capable to be upgraded via the bottom expansion slot to a max of 8MB RAM. i think it should have worked via Bank switching and the DMAGIC should have done the trick. Are you planning to to use the same amount of RAM and the same way to access it. The Base RAM was 128KB.
This is the amount that you have put down for the Specs of the Mega65 as well. I think i have read something that you are trying to access DDR ram. Is this true ? What are your plans ? Will there be 8MB Bank switchable RAM ?Same quetion is on your facebook page.
Thank you very much !