[Coco] What would a CoCo successor have to have as a minimum?

[jdaggett at gate.net]

On 21 Nov 2010 at 0:28, Mark McDougall wrote:

> The real problem that everyone has missed here is how you're going to map a 
> huge chunk of video memory into the 6809 address space, and how you're going 
> to move any decent portion of the screen around in real time.

I sure have not. 

A 640x480 8 color screen requires 307200 bytes. There is almost no way a 6809/6309 could 
do that other than running at about 250MHz or changing teh data buss width.. I realize the 
limitations of an 8 bit databus. 

Clock speed is not necessarily the best way to document processor performance. 

james