--- np2/io/pit.c	2004/07/01 11:42:54	1.22
+++ np2/io/pit.c	2005/05/13 14:49:24	1.24
@@ -337,10 +337,8 @@ static void IOOUTCALL pit_o73(UINT port,
 		return;
 	}
 	setbeepevent(pitch->value, NEVENT_ABSOLUTE);
-	if (!(pitch->ctrl & 0x0c)) {
-		beep_lheventset(1);
-	}
-	else {
+	beep_lheventset(1);												// ver0.79
+	if (pitch->ctrl & 0x0c) {
 		beep_hzset(pitch->value);
 	}
 	(void)port;
@@ -428,7 +426,9 @@ void itimer_reset(void) {
 	pit.ch[4].ch = 4;
 #endif
 	setsystimerevent(0, NEVENT_ABSOLUTE);
+	beep_lheventset(1);												// ver0.79
 	beep_hzset(beepcnt);
+	setrs232cevent(0, NEVENT_ABSOLUTE);
 }
 
 void itimer_bind(void) {