colin mac

I'm not familiar with pics so I can't help much with the assembly.

You need to work out the high and low times of the pulses, and make the pins high and low for those times. Generate that waveform at RC0 first on its own, by making it high, calling a delay of 100uS, bringing it low and calling a delay of whatever that off time is, looping over, rather than trying to get both working together at first.