Long description

(a): The figure is titled two address. It consists of a vertical block labeled memory which ranges from 0 to 0 multiplied by F F F F. A small block labeled I slash O ports is placed next to the memory block.

(b): The figure is titled one address space. It consists of a block that is divided into a smaller upper segment and a larger lower segment. The upper segment is shaded.

(c): The figure is titled two address spaces. It consists of a block that is divided into a smaller upper segment and a larger lower segment. The upper segment is shaded. Another small shaded block is placed next to the previous block.