EMU_TIMER_STATE_ENABLED
if (!active && (sc->timerstate & EMU_TIMER_STATE_ENABLED)) {
sc->timerstate &= ~EMU_TIMER_STATE_ENABLED;
} else if (active && !(sc->timerstate & EMU_TIMER_STATE_ENABLED)) {
sc->timerstate |= EMU_TIMER_STATE_ENABLED;
sc->timerstate &= ~EMU_TIMER_STATE_ENABLED;