# Column 1 is button signals (button 3, 2, 1)
# Column 2 is expected action sequences from output (ok, back, add, sub)
# All output pulses should be exactly 1 cycle long.
000 0000

# Press and release button 2
010 0000
000 1000
000 0000

# Press and release button 3
100 0000
000 0100
000 0000

# Press and release button 2 with shift
# Shift stays down longer than button 2
001 0000
011 0000
001 0010
001 0000
000 0000

# Press and release button 3 with shift
001 0000
101 0000
001 0001
001 0000
000 0000

# From functional spec: "if state of shift (button 1) changes during
# action sequence, the action sequence is aborted."
001 0000
011 0000
010 0000
000 0000

# From functional spec: "beginning of another action sequence while previous
# has not finished will invalidate both sequences."
010 0000
110 0000
010 0000
000 0000

# Hold buttons after invalid sequence

010 0000
110 0000
010 0000
010 0000
010 0000
010 0000
010 0000
010 0000
000 0000
010 0000
000 1000
000 0000
000 0000