Setting up QNX to control a Micro

Hi guys,

I need a little help in setting up QNX to control a micro-controller
Pic18f452 to be precise.

I am running 2 laptops, one with QNX installed, and another running momemtics IDE on windows XP i have no trouble connecting to the QNX target and i can write and run programmes on the target no worries.

However what is the best way to connect a micro up to the QNX machine?
Is the Serial Port the most common method, or does this have drawbacks in terms of speed?

Is there a startup guide, or some peice of material i should read?