Video signal generating circuit

摘要

A video signal generating circuit comprises a buffer memory for storing character codes and control data for control of vertical character positions, a character pattern memory having a plurality of stored character patterns which are selected by the output of the buffer memory, and a control circuit for successively reading the character codes and control data from the buffer memory and the character patterns from the character pattern memory. The value of a logical operation of raster data generated by the control circuit and the control data is used as raster data or an effective raster scan signal for the character pattern memory.