George:
If you are messing around with a graphics LCD you should consider looking at code I posted here on my 8052.com user page. I would not use I2C to interface a graphics display. Use SPI and make the routines as fast as possible. The most efficient means to manage the display is to write all pixels into an in MEMORY bitmap image and then each time a display update is to happen you would squirt the bitmap buffer to the display. I have used Cgynal parts at 22.1184 MHz and have seen the squirt operation able to be completed in less than 10 milliseconds for a 128x64 display.

Michael Karas