A video game system includes a game cartridge which is pluggably attached to a main console having a main processor, a 3D graphics generating coprocessor, expandable main memory and player controllers. A multifunctional peripheral processing subsystem external to the game microprocessor and coprocessor...http://www.google.ca/patents/US6331146?utm_source=gb-gplus-sharePatent US6331146 - Video game system and method with enhanced three-dimensional character and background control
