I built a VGA co-processor per Nick's instructions at http://www.gammon.com.au/forum/?id=11608
I'm using the 8 color version and am successfully running the color test on my VGA enabled TV. I'm ready to move on to the host arduino sending commands over I2C, but I'm having difficulty reconciling the B/W sketch with communications with the 8 color sketch without communications. Nick, please help? Do you have the comms enabled sending sketch that works with a comms enabled 8 color receiving sketch handy?