A computer graphics display system including random access raster memory for storing data to be displayed, a raster memory control unit for writing data into the raster memory, a video control unit for causing such information to be displayed on a CRT display screen, a micro control unit for controlling...http://www.google.se/patents/US4070710?utm_source=gb-gplus-sharePatent US4070710 - Raster scan display apparatus for dynamically viewing image elements stored in a random access memory array
