[Coco] What about the double speed upgrade?

[jdaggett at gate.net]

SPeed compatibility issues will exist with either processor when doing anything 
outside the processor. All the existing peripheral devices would have to be of 
equal speed grade with the E clock. 

On instructions that are internal to the processor there is no real major issues 
except in software timing loops. 

james

On 4 Jan 2007 at 19:16, Leon Howell wrote:

> > The HD6309E is 100% compatible software with the MC6809E. The revesrse is 
> > not true due to the extra registers and increased instruction set contianed 
> inthe 
> > HD6309E.
> > 
> > james
> > 
> 
> I meant compatability problems caused by the speed.
> 
> 
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