Abstract: A graphical display of a video game is provided with "first person views" of game play, by generation of simulated three-dimensional perspectives. A slave computational unit relieves a master microprocessor of arithmetic and logical operations necessary for coordinate transformations required to generate the desired video image vectors. Within the slave unit, decoded addresses from the master unit initiate access of microinstructions, from a ROM, which control a dedicated ALU which performs the transformation calculations. When the tasks are finished, the slave processor's clock is turned off by microcode from the slave's own ROM. The results of the slave's computations are retrieved by the master processor and inserted into vector instructions to drive a CRT.