logfile XOR.log
ana in1 in2 select1 select2 OUT
w   in1 in2 select1 select2 OUT
V   in1      0 0 0 0 1 1 1 1   0
V   in2      0 0 1 1 0 0 1 1   0
V   select1  0 1 0 1 0 1 0 1   0
V   select2  1 0 1 0 1 0 1 0   0
clock Vdd 1
R