diff --git a/src/emu/sound/ay8910.c b/src/emu/sound/ay8910.c
index 9085c87a231..b70b6ddf375 100644
--- a/src/emu/sound/ay8910.c
+++ b/src/emu/sound/ay8910.c
@@ -1116,6 +1116,11 @@ WRITE8_DEVICE_HANDLER( ay8910_data_w )
 #endif
 }
 
+WRITE8_DEVICE_HANDLER( ay8910_reset_w )
+{
+	ay8910_reset_ym(get_safe_token(device));
+}
+
 static const int mapping8914to8910[16] = { 0, 2, 4, 11, 1, 3, 5, 12, 7, 6, 13, 8, 9, 10, 14, 15 };
 
 READ8_DEVICE_HANDLER( ay8914_r )
@@ -1132,6 +1137,8 @@ WRITE8_DEVICE_HANDLER( ay8914_w )
 	ay8910_data_w(device, 0, data & 0xff);
 }
 
+
+
 DEFINE_LEGACY_SOUND_DEVICE(AY8910, ay8910);
 DEFINE_LEGACY_SOUND_DEVICE(AY8912, ay8912);
 DEFINE_LEGACY_SOUND_DEVICE(AY8913, ay8913);
diff --git a/src/emu/sound/ay8910.h b/src/emu/sound/ay8910.h
index de47db39693..0699cc5b942 100644
--- a/src/emu/sound/ay8910.h
+++ b/src/emu/sound/ay8910.h
@@ -91,6 +91,9 @@ READ8_DEVICE_HANDLER( ay8910_r );
 WRITE8_DEVICE_HANDLER( ay8910_address_w );
 WRITE8_DEVICE_HANDLER( ay8910_data_w );
 
+/* /RES */
+WRITE8_DEVICE_HANDLER( ay8910_reset_w );
+
 /* use this when BC1 == A0; here, BC1=0 selects 'data' and BC1=1 selects 'latch address' */
 WRITE8_DEVICE_HANDLER( ay8910_data_address_w );
 
diff --git a/src/mame/drivers/munchmo.c b/src/mame/drivers/munchmo.c
index 4ecc07993d6..1911eeae4d5 100644
--- a/src/mame/drivers/munchmo.c
+++ b/src/mame/drivers/munchmo.c
@@ -9,7 +9,6 @@
   Known Issues:
     - it's unclear if mirroring the videoram chunks is correct behavior
     - several unmapped registers
-    - sustained sounds (when there should be silence)
 
 Stephh's notes (based on the game Z80 code and some tests) :
 
@@ -55,10 +54,9 @@ static TIMER_DEVICE_CALLBACK( mnchmobl_interrupt )
 
 static INTERRUPT_GEN( mnchmobl_sound_irq )
 {
-	munchmo_state *state = device->machine().driver_data<munchmo_state>();
+	//munchmo_state *state = device->machine().driver_data<munchmo_state>();
 
-	if (!(state->m_sound_nmi_enable))
-		device_set_input_line(device, INPUT_LINE_NMI, ASSERT_LINE);
+	device_set_input_line(device, INPUT_LINE_NMI, ASSERT_LINE);
 }
 
 static WRITE8_HANDLER( mnchmobl_soundlatch_w )
@@ -69,12 +67,6 @@ static WRITE8_HANDLER( mnchmobl_soundlatch_w )
 	device_set_input_line(state->m_audiocpu, 0, HOLD_LINE );
 }
 
-static WRITE8_HANDLER( sound_nmi_enable_w )
-{
-	munchmo_state *state = space->machine().driver_data<munchmo_state>();
-	state->m_sound_nmi_enable = data & 1;
-}
-
 
 static WRITE8_HANDLER( sound_nmi_ack_w )
 {
@@ -82,6 +74,11 @@ static WRITE8_HANDLER( sound_nmi_ack_w )
 	device_set_input_line(state->m_audiocpu, INPUT_LINE_NMI, CLEAR_LINE);
 }
 
+static READ8_DEVICE_HANDLER( munchmo_ayreset_r )
+{
+	ay8910_reset_w(device,0,0);
+	return 0;
+}
 
 /*************************************
  *
@@ -113,17 +110,18 @@ static ADDRESS_MAP_START( mnchmobl_map, AS_PROGRAM, 8 )
 	AM_RANGE(0xbf03, 0xbf03) AM_READ_PORT("P2")
 ADDRESS_MAP_END
 
+/* memory map provided thru schematics */
 static ADDRESS_MAP_START( sound_map, AS_PROGRAM, 8 )
 	AM_RANGE(0x0000, 0x1fff) AM_ROM
-	AM_RANGE(0x2000, 0x2000) AM_READ(soundlatch_r)
-	AM_RANGE(0x4000, 0x4000) AM_DEVWRITE("ay1", ay8910_data_w)
-	AM_RANGE(0x5000, 0x5000) AM_DEVWRITE("ay1", ay8910_address_w)
-	AM_RANGE(0x6000, 0x6000) AM_DEVWRITE("ay2", ay8910_data_w)
-	AM_RANGE(0x7000, 0x7000) AM_DEVWRITE("ay2", ay8910_address_w)
-	//AM_RANGE(0x8000, 0x8000) AM_WRITE(mnchmobl_soundlatch_w) /* ? */
-	AM_RANGE(0xa000, 0xa000) AM_WRITE(sound_nmi_enable_w)
-	AM_RANGE(0xc000, 0xc000) AM_WRITE(sound_nmi_ack_w)
-	AM_RANGE(0xe000, 0xe7ff) AM_RAM
+	AM_RANGE(0x2000, 0x3fff) AM_READ(soundlatch_r)
+	AM_RANGE(0x4000, 0x4fff) AM_DEVWRITE("ay1", ay8910_data_w)
+	AM_RANGE(0x5000, 0x5fff) AM_DEVWRITE("ay1", ay8910_address_w)
+	AM_RANGE(0x6000, 0x6fff) AM_DEVWRITE("ay2", ay8910_data_w)
+	AM_RANGE(0x7000, 0x7fff) AM_DEVWRITE("ay2", ay8910_address_w)
+	AM_RANGE(0x8000, 0x9fff) AM_DEVREADWRITE("ay1", munchmo_ayreset_r, ay8910_reset_w)
+	AM_RANGE(0xa000, 0xbfff) AM_DEVREADWRITE("ay2", munchmo_ayreset_r, ay8910_reset_w)
+	AM_RANGE(0xc000, 0xdfff) AM_WRITE(sound_nmi_ack_w)
+	AM_RANGE(0xe000, 0xe7ff) AM_MIRROR(0x1800) AM_RAM // is mirror ok?
 ADDRESS_MAP_END
 
 
@@ -435,5 +433,5 @@ ROM_END
  *
  *************************************/
 
-GAME( 1983, joyfulr,  0,        mnchmobl, mnchmobl, 0, ROT270, "SNK", "Joyful Road (Japan)", GAME_IMPERFECT_SOUND | GAME_NO_COCKTAIL | GAME_SUPPORTS_SAVE )
-GAME( 1983, mnchmobl, joyfulr,  mnchmobl, mnchmobl, 0, ROT270, "SNK (Centuri license)", "Munch Mobile (US)", GAME_IMPERFECT_SOUND | GAME_NO_COCKTAIL | GAME_SUPPORTS_SAVE )
+GAME( 1983, joyfulr,  0,        mnchmobl, mnchmobl, 0, ROT270, "SNK", "Joyful Road (Japan)", GAME_NO_COCKTAIL | GAME_SUPPORTS_SAVE )
+GAME( 1983, mnchmobl, joyfulr,  mnchmobl, mnchmobl, 0, ROT270, "SNK (Centuri license)", "Munch Mobile (US)", GAME_NO_COCKTAIL | GAME_SUPPORTS_SAVE )
diff --git a/src/mame/includes/munchmo.h b/src/mame/includes/munchmo.h
index afa190a3a6e..b4c9c0dca23 100644
--- a/src/mame/includes/munchmo.h
+++ b/src/mame/includes/munchmo.h
@@ -25,7 +25,6 @@ public:
 
 	/* misc */
 	int          m_nmi_enable;
-	UINT8        m_sound_nmi_enable;
 
 	/* devices */
 	device_t *m_maincpu;