Dan Barlow's Webpage

This shield implements an 8 bit frame buffer with pages memory mapped into the upper half of the Arduino MEGA address space.

The shield incorporates a CRT controller function that scans the memory out to a Look Up Table of 24 bit color entries.

The resulting 24 bits of color are sent to an external LCD.

The memory containing the LUT is also mapped into the Arduino address space.

During the interval between frames, the pointer into the LUT memory can be changed so that the next frame receives a different set of colors.

An example sketch is provided that shows how to use and test the display and look up table.