[Coco] 6809 CPU architecture

[Paul T. Barton]

You forgot ,W
It's also a 'kind of' index register,
with limited usage.

Paul T Barton

--- Roger Taylor <rtaylor at bayou.com> wrote:
> I think you replied to Robert's 6809 msg but
> thanked me.
> 
> Anyway, here's some more pointers for you....
> 
> 
> ,X
> 
> ,Y
> 
> ,U
> 
> ,S
> 
> :)
> 
> 
> 
> 
> At 06:39 PM 1/22/2004 -0800, you wrote:
> >Roger:
> >
> >Thanks for the pointers, keep them coming :)
> >
> >Jim
> >On Tue, 20 Jan 2004 00:34:53 -0500
> >  Robert Gault <robert.gault at worldnet.att.net>
> wrote:
> >>
> >>6809 Registers
> >>
> >>bit #   15                                   
> 0
> >>        
> ---------------------------------------
> >>                   X - Index Register
> >>        
> ---------------------------------------
> >>                   Y - Index Register
> >>        
> ---------------------------------------
> >>                 U - User Stack Pointer
> >>        
> ---------------------------------------
> >>               S - Hardware Stack Pointer
> >>        
> ---------------------------------------
> >>                  PC - Program Counter
> >>        
> --------------------|------------------
> >>            A - Accumulator  | B -
> Accumulator
> >>        
> ---------------------------------------
> >>        
> \___________________D_________________/
> 
> 
> ----------
> Roger Taylor
> 
> 
> 
> 
> -- 
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> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco


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