METHOD AND APPARATUS FOR GENERATING A TRAVELING DISPLAY

摘要

A method and apparatus for generating traveling display on a cyclically scanned electronic display device such as a cathode ray tube (CRT). The characters to be displayed are stored in a memory means with space being provided in the memory for a number of buffer characters waiting to be displayed. At a predetermined time in each cycle of the display a determination is made of the number of buffer characters then awaiting display. Each character is formed from a plurality of strokes. Depending on the number of buffer characters awaiting display, the display is shifted left by a selected number of character strokes for each display cycle. By varying the number of strokes that the display is advanced for each cycle in this way, the rate at which the display is moved may be varied as a function of the rate at which data to be displayed is received. The shifting by a small number of strokes for each cycle provides for a smooth flow of information across the display.