[Coco] Quick 6809 Q for night owls in the US

[Steve]

Tim,

Can't use the U (or S) register for this loop since the Z-flag is not 
set when doing LEA or LD operations.  These are stack registers and 
should not effect any flags since that would be bad for saving the state 
of the CPU.

Steve


On 4/15/2014 6:24 AM, tim at franklinlabs.com wrote:
> I'm not at home to test but wouldn't this work??/
>
>                  LDU    #1000
> LOOP:    LEAU    -1,U
>                  BNE    LOOP
>
> All inside the CPU.
>