On 21 Dec 2017 at 1:14, andrew kelley wrote:

> <snip> Still it bothers
> me as to why the code runs fine on a 18f4550, but not a 18f2550. Not the
> target code mind you, but the simplest test code that reproduces the
> issue.
>
> <CODE>
> char degCtr;
> void main(void)
> {
>     char tmp;
>     TRISB=3D0;
>     degCtr=3D0;
>     while(1)
>     {
> 		tmp=3D255;
> 		while(tmp) tmp--;
> 		tmp=3D255;
> 		while(tmp) tmp--;
>  		degCtr++;
> 		LATB=3DdegCtr;
>     }
> }
> </CODE>

I have in the past had problems with compiler supplied header files alterin=
g the=20
behaviour of the config macros, between chips and between compiler versions=
,=20
although in my case it was Hi-Tech/MicrochipXC8. With that in mind, and if =
not tried=20
already, I'd double check with and without WDT enabled, even change the WDT=
=20
period to see if it's related.

Not shown in your code above is disabling of interrupts. Perhaps the bootlo=
ader is=20
leaving something in an unexpected state.

--=20
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