Following the overall CAMEX conventions, S and s will set evolution going in the CAM , whilst G and g apply to the console screen, where the limitations of small size and non-cyclic borders apply.
As they evolve, even the sample CAM screens will degenerate, for two reasons: Unless the width of the strip is a divisor of 256, the width of the CAM screen (or of the width of the console screen, as appropriate), the configuration will not be truly periodic; only in rare instances will this be immaterial.
The screen is generated from the center row upwards and downwards; there is no guarantee that joining will occur in the vertical direction either. Even if the second level de Bruijn diagram permitted it, the program would make no effort to ensure vertical closure. So all the allowable configurations can materialize, but only as finite extracts from the infinite plane.