Image control unit for a video display unit

An image control unit for a video display for generating control signals serving to construct an image on a display unit, including, in combination, a storage device for storing a plurality of sequence control words corresponding to groups of one or more raster lines displayed on said display unit, each of said sequence of control words being associated with a block of identical raster lines to be displayed, a first counter having an output connected to address inputs of said storage device, means for incremeting said first counter for each character to be represented on said video display, whereby said storage device successively reads out control words corresponding to the characters to be represented on a raster line of said display device, a second counter, means connected to said second counter and to said storage device for setting said second counter to a predetermined block length, in accordance with said control words, said second counter being connected to receive an output from said storage device corresponding to a raster line-end signal stored therein to count the raster lines of a block, and a third counter having its output connected to address inputs of said storage device and its input connected to an output of said second counter, whereby said third counter is incremented after a given sequence of control words when said storage device has been accessed a number of times equal to the number of raster lines in its associated block.