On Mar 15, 2007, at 6:19 PM, George Richards wrote:

> The original delay loop is for a 4MHz oscillator. For creating  
> timing loops,
> I use a neat little program called picloops (just google for it).
>
> The erratic operation sounds like a mclr issue.

Also, in most cases it helps to pull down the unused IO-pins on the  
microcontroller - tie them to GND with 10K~47K resistors. At least,  
that helped me to solve the same issue with 16F877. Another problem  
may be with your power supply - putting a 100n cap between Vcc and  
Vdd may help - at least, it never hurts.

cheers,
Andrei
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