From the Terminator fandom wiki: The CPU was modeled and designed primarily on computers in advanced 3-Dimensional programming packages, where simulated testin

From the Terminator fandom wiki: The CPU was modeled and designed primarily on computers in advanced 3-Dimensional programming packages, where simulated testing could be done in real time, or at increased rates. The lattice of cubes in the construction of the prototype CPU suggests a "hypercube", a cube of more than three dimensions. In computer design, hypercubes are used as a physical connection scheme that minimizes the effective communication distance (and therefore the time delay) between processors, when the logical connection scheme needed by the software that will be run on those processors cannot be known in advance. This then supports the Neural Net's ability to learn, adapt, and built new logical connection schemes.