Thanks for the input. I have the LM1881, and I am using it for both the vertical and comp sync pulses. I have gone to 14.316 MHz for the uP crystal. When divided by 4, it gives me the 3.58 MHz needed to address single pixels. Even if the oscillator is out of step with the video clock, the jitter is minimal. I will experiment with stopping the oscillator to sync it up with the vertical pulse and see if there is any perceptible difference.

Thanks again,
Ron