As things stand right now you are limited to receiving help from those forum readers who are familiar with both the "Color Smart GPU" and with the HD74480 based displays. If you were to post a link to information, preferably a datasheet, about that "Color Smart GPU" then you have a much greater chance of getting help since a lot of us are familiar with the HD74480 based displays.
Please use the 'code' button, it looks like a '#', when posting code.
Don