Signal Crossing in VNCA
In von Neumann's original cellular automaton, the crossing of signals is much more difficult. The most widely used signal crossing organs are the coded channel (devised by von Neumann himself), Gorman's real-time crossing organ, and the Mukhopadhyay crossing organ. The coded channel can only cross individual pulses; the others are capable of crossing entire packets without interference, analogous the crossing organ in Nobili's cellular automaton. The Mukhopadhyay crossing organ comprises three XOR gates, in the arrangement shown (left).
Read more about this topic: Nobili Cellular Automata
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