ISV_S_RETRACE
case state_and_input(ISV_S_RETRACE, true):
case state_and_input(ISV_S_RETRACE, false):
if (state == ISV_S_CAPTURE0 || state == ISV_S_RETRACE)
if (*state == ISV_S_RETRACE)
if (*state != ISV_S_RETRACE)