#MCell 4.00
#GAME Rules table
#RULE 1,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,2,2,2,2,2,2,0,3,3,3,3,3,3,3,3,3,
#RULE 0,3,1,1,3,3,3,3,3,3
#BOARD 60x60
#SPEED 100
#WRAP 0
#CCOLORS 4
#PALETTE 8 colors
#D XOR (EXCLUSIVE OR)
#D 
#D A signal from top or bottom (not both) will cause a signal to leave at right.
#D No signal will pass through from top to bottom or vice versa.
#D 
#D As a circuit element it is not much used in design, but it has a theoretical
#D importance with respect to minimal collections of gates from which all
#D others can be derived. For example, NANDs by themselves are sufficient
#D for the purpose. 
#D 
#D Harold V. MacIntosh
#L .A$.C$.C$.C$4C$C.10C$4C$.C$.C$.C$.C3$.C$.C$.C$.C$4C$C.10C$4C$.C$.C$.C$
#L .A3$.A$.C$.C$.C$4C$C.10C$4C$.C$.C$.C$.A