On Thu, 3 Apr 2008, Stephen D. Barnes wrote:
>   
>> The following code is from the MPLab template for the dsPIC30F2010.
>> Watching the W14 reg and running mpsim, W14 does pre-increments and
>> throught the REPEAT loop
>> achieves a value of 0x001A then is cleared to zero. What purpose does
>> this serve?
>>
>> _wreg_init:
>>        CLR W0
>>        MOV W0, W14
>>        REPEAT #12
>>        MOV W0, [++W14]
>>        CLR W14
>>        RETURN
>>     
>
> It prevents buggy code from generating an uninitialized W register
> reset, which is caused by using an uninitialized W register as an
> address.  This code pretty much defeats the whole point of the
> uninitialized W register reset feature.
>
> --
> John W. Temples, III
>   
But this is only doing something to W0 and W14...or am I wrong? I'm 
really trying to
get my head around this!

-- 
Regards,
Stephen D. Barnes

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