A computer output system having a first full screen bitmapped memory, a second full screen bitmapped memory, logic circuitry for providing input signals for writing information to be displayed by an output device to each position of the first memory, logic circuitry for storing in the second memory the...http://www.google.de/patents/US5043923?utm_source=gb-gplus-sharePatent US5043923 - Apparatus for rapidly switching between frames to be presented on a computer output display
