Thanks Gary,
From what I can tell, PICS have been used extensively in decoders. The specific issue that I'm trying to nail down is all of the code that I have seen is in assembly. I can muddle through assembly, but in this app, the timing is very tight, and I haven't mastered the skill to mimic the code in PBP. I have been refining the attack and will whittle away at it. I DON'T want to specifically duplicate the existing function, if so I could just burn the available .hex. I'm trying to accomplish comm over 2 wire in a similar way that is done in DCC. That's why I need to have control of the code.
I appreciate all of the feedback that everyone has offered. It looks like I'll just have to upgrade my skill set a bit.
Thanks
Bo