--- np2/io/pit.c	2004/07/01 11:42:54	1.22
+++ np2/io/pit.c	2005/05/20 13:59:47	1.25
@@ -126,12 +126,18 @@ void rs232ctimer(NEVENTITEM item) {
 
 	if (item->flag & NEVENT_SETEVENT) {
 		pitch = pit.ch + 2;
+		if (pitch->flag & PIT_FLAG_I) {
+			pitch->flag &= ~PIT_FLAG_I;
+			rs232c_callback();
+		}
 		if ((pitch->ctrl & 0x0c) == 0x04) {
 			// レートジェネレータ
 			setrs232cevent(pitch->value, NEVENT_RELATIVE);
 		}
+		else {
+			setrs232cevent(0, NEVENT_RELATIVE);
+		}
 	}
-	rs232c_callback();
 }
 
 
@@ -337,10 +343,8 @@ 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;
@@ -355,6 +359,7 @@ static void IOOUTCALL pit_o75(UINT port,
 	if (pit_setcount(pitch, dat)) {
 		return;
 	}
+	pitch->flag |= PIT_FLAG_I;
 	rs232c_open();
 	setrs232cevent(pitch->value, NEVENT_ABSOLUTE);
 	(void)port;
@@ -428,7 +433,9 @@ 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) {