If you are installing from the blue disc, you shouldn't have any problems.
But remember to right-click the install program and "Run As Administrator".
If you are installing from an older Black and White disc, there are a few extra steps to follow.
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Re: Multiple PICs on usart network
Car automakers had to do it with better electrical characteristics I guess.
Ioannis Today, 07:00I'd also choose 2 wires USART classic setup. Tested and guarrateed to work just fine.
Ioannis