My current design reflects the basic example in the help files in uvision. I current have 7 banks and one common area. I keep reading that Keil has support for 16MB of XDATA code space. But all the examples I've seen and the math I do 32 banks @64KB comes out to 2MB of code space. What am I missing to support that much XDATA code space if the hardware under the optimum conditions only permit 2MB limitations? I'd like to expand my code space to 16MB for some of the things I'm doing, but I can't seem to find any models that allow for the sizing limitation to be made larger than 2MB. Any ideas, or am I missing something? Jon? Thanks Chris