Abstract: A control device for a video display module includes means for scrolling the displayed alpha-numeric data either up or down, means for displaying the top line of the displayed data from the top of the video screen, and means for selecting the starting point within a memory system at which the display of alpha-numeric data commences. The device includes an address register and a displacement register which store the memory address at which display commences, and the displacement of the beginning of the display from the top of the screen, respectively. Each register feeds a respective displacement counter and an address counter. Loading of the displacement counter is actuated by the vertical retrace signal, while loading of the address counter is actuated at the time when the displacement counter reaches zero. The address counter is incremented by the text line advance signal of the display circuitry, and the address counter output is connected to the internal memory line address input.