[Coco] 6809 / General CPU question

Bruce W. Calkins brucewcalkins at charter.net
Sat Feb 19 08:18:09 EST 2011


----- Original Message ----- 
From: "Mike Rowen"

> Basic theory question here. When a 6809 is powered up, does it 
> automatically
> begin fetching instructions at a specific location? I have been looking
> through some books, but I have yet to find any document that describes the
> boot process from the CPU perspective.
>
> Regards,
> -Mike

===============================

My understanding is that all CPUs start looking at a specific location.  The 
information at that location determines where the next instruction comes 
from.  I don't know the address for the 6809s start off the top of my head 
though, but I do remember reading about it in my past.

Bruce W. 




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