On Thu, 1 Nov 2001, K|bek Tony wrote:

> Neat ! however..
>
> a bit concerned over 8 bit pcl rollover ( i.e. from 0xFF -> 0x00 )
> lets try with the following:
> Let's try with 1 loop delay and let PCL have the value 0xFF at the
> first subwf.
>
> W = 1 -> a 5 cycle delay ( excluding and returns or calls )
>
> Delay500Loop_1                  ; W = 1
>      subwf       PCL,W          ; PCL = 0xFF ( 255 ) -> F-W = 254
>      subwf       PCL,W            ; PCL = 0x00 -> F-W = 254 !!! gotcha...
>      skpz                       ;
>       goto      Delay500Loop    ; loop forever....

Tony,

It's actually 0 - 254 which yields 2. Roll over is no problem.

Dwayne has stumbled on a truly devious piece of code that couldn't have
been posted on a better day of the year!

Scott

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