' comments
'p = 1 = off
'n = 0 = off

e b ef er d lf lr : an ap bn bp
0 x x  x  x  x  x   0  1  0  1 'all off
1 1 x  x  x  x  x   0  0  0  0 'p's on
1 0 1  0  0  0  x   0  0  0  1 'turn bp off in prep
1 0 1  0  0  1  x   0  0  0  1
1 0 1  0  1  1  0   0  0  1  1 'driving ap - bn
1 0 0  0  1  1  0   0  0  0  1
1 0 0  0  0  1  0   0  0  0  0
1 0 0  1  0  x  0   0  1  0  0 'turn ap off in prep
1 0 0  1  0  x  1   0  1  0  0
1 0 0  1  1  0  1   1  1  0  0  'driving bp - an   
1 0 0  0  1  0  1   0  1  0  0
1 0 0  0  0  0  1   0  0  0  0 

;