From e5515e54dee8830a99a718bbed8e1f09d1a02c8c Mon Sep 17 00:00:00 2001
From: Ian Karlsson <themvrules@gmail.com>
Date: Wed, 22 Jul 2015 16:06:00 +0200
Subject: [PATCH 1/3] C352: Add divider for System 23, change enum format

---
 src/emu/sound/c352.c        | 18 ++----------------
 src/emu/sound/c352.h        |  7 ++++---
 src/mame/drivers/namcofl.c  |  2 +-
 src/mame/drivers/namconb1.c |  4 ++--
 src/mame/drivers/namcond1.c |  2 +-
 src/mame/drivers/namcos11.c |  2 +-
 src/mame/drivers/namcos12.c |  2 +-
 src/mame/drivers/namcos22.c |  4 ++--
 src/mame/drivers/namcos23.c |  8 ++++----
 9 files changed, 18 insertions(+), 31 deletions(-)

diff --git a/src/emu/sound/c352.c b/src/emu/sound/c352.c
index b4172e43aa0..a28f332a786 100644
--- a/src/emu/sound/c352.c
+++ b/src/emu/sound/c352.c
@@ -468,7 +468,7 @@ void c352_device::write_reg16(unsigned long address, unsigned short val)
 
 void c352_device::device_start()
 {
-	int i, divider;
+	int i;
 	double x_max = 32752.0;
 	double y_max = 127.0;
 	double u = 10.0;
@@ -476,21 +476,7 @@ void c352_device::device_start()
 	// find our direct access
 	m_direct = &space().direct();
 
-	switch(m_divider)
-	{
-		case C352_DIVIDER_228:
-			divider=228;
-			break;
-		case C352_DIVIDER_288:
-		default:
-			divider=288;
-			break;
-		case C352_DIVIDER_332:
-			divider=332;
-			break;
-	}
-
-	m_sample_rate_base = clock() / divider;
+	m_sample_rate_base = clock() / m_divider;
 
 	m_stream = machine().sound().stream_alloc(*this, 0, 4, m_sample_rate_base);
 
diff --git a/src/emu/sound/c352.h b/src/emu/sound/c352.h
index 31eceffb366..2e653887450 100644
--- a/src/emu/sound/c352.h
+++ b/src/emu/sound/c352.h
@@ -11,9 +11,10 @@
 
 enum
 {
-	C352_DIVIDER_228 = 0,
-	C352_DIVIDER_288 = 1,
-	C352_DIVIDER_332 = 2
+	C352_DIVIDER_S11 = 228, // System 11
+	C352_DIVIDER_S22 = 288, // System 22, Super 22, NB, ND, FL
+	C352_DIVIDER_S23 = 296, // System 23, Super 23
+	C352_DIVIDER_S12 = 332  // System 12
 };
 
 //**************************************************************************
diff --git a/src/mame/drivers/namcofl.c b/src/mame/drivers/namcofl.c
index 7b0d437d82e..4db68e924d7 100644
--- a/src/mame/drivers/namcofl.c
+++ b/src/mame/drivers/namcofl.c
@@ -610,7 +610,7 @@ static MACHINE_CONFIG_START( namcofl, namcofl_state )
 	MCFG_VIDEO_START_OVERRIDE(namcofl_state,namcofl)
 
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
-	MCFG_C352_ADD("c352", 48384000/2, C352_DIVIDER_288)
+	MCFG_C352_ADD("c352", 48384000/2, C352_DIVIDER_S22)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
diff --git a/src/mame/drivers/namconb1.c b/src/mame/drivers/namconb1.c
index 0994ae17686..b3b498b8ffc 100644
--- a/src/mame/drivers/namconb1.c
+++ b/src/mame/drivers/namconb1.c
@@ -1126,7 +1126,7 @@ static MACHINE_CONFIG_START( namconb1, namconb1_state )
 	MCFG_VIDEO_START_OVERRIDE(namconb1_state,namconb1)
 
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
-	MCFG_C352_ADD("c352", MASTER_CLOCK/2, C352_DIVIDER_288)
+	MCFG_C352_ADD("c352", MASTER_CLOCK/2, C352_DIVIDER_S22)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
@@ -1163,7 +1163,7 @@ static MACHINE_CONFIG_START( namconb2, namconb1_state )
 	MCFG_VIDEO_START_OVERRIDE(namconb1_state,namconb2)
 
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
-	MCFG_C352_ADD("c352", MASTER_CLOCK/2, C352_DIVIDER_288)
+	MCFG_C352_ADD("c352", MASTER_CLOCK/2, C352_DIVIDER_S22)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
diff --git a/src/mame/drivers/namcond1.c b/src/mame/drivers/namcond1.c
index bef6cecaaa7..8da4a1987ad 100644
--- a/src/mame/drivers/namcond1.c
+++ b/src/mame/drivers/namcond1.c
@@ -319,7 +319,7 @@ static MACHINE_CONFIG_START( namcond1, namcond1_state )
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_C352_ADD("c352", XTAL_49_152MHz/2, C352_DIVIDER_288)
+	MCFG_C352_ADD("c352", XTAL_49_152MHz/2, C352_DIVIDER_S22)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
diff --git a/src/mame/drivers/namcos11.c b/src/mame/drivers/namcos11.c
index e6d53c00e6c..8bef7bff55d 100644
--- a/src/mame/drivers/namcos11.c
+++ b/src/mame/drivers/namcos11.c
@@ -571,7 +571,7 @@ static MACHINE_CONFIG_START( coh110, namcos11_state )
 
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_C352_ADD("c352", 20013200, C352_DIVIDER_228)
+	MCFG_C352_ADD("c352", 20013200, C352_DIVIDER_S11)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
diff --git a/src/mame/drivers/namcos12.c b/src/mame/drivers/namcos12.c
index d89c8a0c31c..e9e78d58c61 100644
--- a/src/mame/drivers/namcos12.c
+++ b/src/mame/drivers/namcos12.c
@@ -1591,7 +1591,7 @@ static MACHINE_CONFIG_START( coh700, namcos12_state )
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_C352_ADD("c352", 29168000, C352_DIVIDER_332)
+	MCFG_C352_ADD("c352", 29168000, C352_DIVIDER_S12)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
diff --git a/src/mame/drivers/namcos22.c b/src/mame/drivers/namcos22.c
index af329845cdb..dab1ca4d7e4 100644
--- a/src/mame/drivers/namcos22.c
+++ b/src/mame/drivers/namcos22.c
@@ -3781,7 +3781,7 @@ static MACHINE_CONFIG_START( namcos22, namcos22_state )
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_C352_ADD("c352", SS22_MASTER_CLOCK/2, C352_DIVIDER_288)
+	MCFG_C352_ADD("c352", SS22_MASTER_CLOCK/2, C352_DIVIDER_S22)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
@@ -3830,7 +3830,7 @@ static MACHINE_CONFIG_START( namcos22s, namcos22_state )
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_C352_ADD("c352", SS22_MASTER_CLOCK/2, C352_DIVIDER_288)
+	MCFG_C352_ADD("c352", SS22_MASTER_CLOCK/2, C352_DIVIDER_S22)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
diff --git a/src/mame/drivers/namcos23.c b/src/mame/drivers/namcos23.c
index fd92dc91d8f..789b7b93c16 100644
--- a/src/mame/drivers/namcos23.c
+++ b/src/mame/drivers/namcos23.c
@@ -1247,7 +1247,7 @@ Notes:
 #define JVSCLOCK    (XTAL_14_7456MHz)
 #define H8CLOCK     (16737350)      /* from 2061 */
 #define BUSCLOCK    (16737350*2)    /* 33MHz CPU bus clock / input */
-#define C352CLOCK   (25992000)  /* measured at 25.992MHz from 2061 pin 9 (System 12 uses a divider of 332) */
+#define C352CLOCK   (25992000)  /* measured at 25.992MHz from 2061 pin 9 (C352 divider is 296) */
 #define VSYNC1      (59.8824)
 #define VSYNC2      (59.915)
 #define HSYNC       (16666150)
@@ -3320,7 +3320,7 @@ static MACHINE_CONFIG_START( gorgon, namcos23_state )
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_C352_ADD("c352", C352CLOCK, C352_DIVIDER_332)
+	MCFG_C352_ADD("c352", C352CLOCK, C352_DIVIDER_S23)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
@@ -3389,7 +3389,7 @@ static MACHINE_CONFIG_START( s23, namcos23_state )
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_C352_ADD("c352", C352CLOCK, C352_DIVIDER_332)
+	MCFG_C352_ADD("c352", C352CLOCK, C352_DIVIDER_S23)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
@@ -3469,7 +3469,7 @@ static MACHINE_CONFIG_START( ss23, namcos23_state )
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_C352_ADD("c352", C352CLOCK, C352_DIVIDER_332)
+	MCFG_C352_ADD("c352", C352CLOCK, C352_DIVIDER_S23)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)

From 667a6a11dcd353403cf160adfc80e653300374e4 Mon Sep 17 00:00:00 2001
From: Ian Karlsson <themvrules@gmail.com>
Date: Wed, 22 Jul 2015 22:05:47 +0200
Subject: [PATCH 2/3] c352: define divider constants in the drivers instead.
 Add a note explaining dividers in c352.c

---
 src/emu/sound/c352.h        | 12 ------------
 src/mame/drivers/namcofl.c  |  2 +-
 src/mame/drivers/namconb1.c |  4 ++--
 src/mame/drivers/namcond1.c |  2 +-
 src/mame/drivers/namcos11.c |  2 +-
 src/mame/drivers/namcos12.c |  2 +-
 src/mame/drivers/namcos22.c |  4 ++--
 src/mame/drivers/namcos23.c |  9 +++++----
 8 files changed, 13 insertions(+), 24 deletions(-)

diff --git a/src/emu/sound/c352.h b/src/emu/sound/c352.h
index 2e653887450..24a2a1cbe74 100644
--- a/src/emu/sound/c352.h
+++ b/src/emu/sound/c352.h
@@ -5,18 +5,6 @@
 #ifndef __C352_H__
 #define __C352_H__
 
-//**************************************************************************
-//  CONSTANTS
-//**************************************************************************
-
-enum
-{
-	C352_DIVIDER_S11 = 228, // System 11
-	C352_DIVIDER_S22 = 288, // System 22, Super 22, NB, ND, FL
-	C352_DIVIDER_S23 = 296, // System 23, Super 23
-	C352_DIVIDER_S12 = 332  // System 12
-};
-
 //**************************************************************************
 //  INTERFACE CONFIGURATION MACROS
 //**************************************************************************
diff --git a/src/mame/drivers/namcofl.c b/src/mame/drivers/namcofl.c
index 4db68e924d7..edb418cbd4c 100644
--- a/src/mame/drivers/namcofl.c
+++ b/src/mame/drivers/namcofl.c
@@ -610,7 +610,7 @@ static MACHINE_CONFIG_START( namcofl, namcofl_state )
 	MCFG_VIDEO_START_OVERRIDE(namcofl_state,namcofl)
 
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
-	MCFG_C352_ADD("c352", 48384000/2, C352_DIVIDER_S22)
+	MCFG_C352_ADD("c352", 48384000/2, 288)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
diff --git a/src/mame/drivers/namconb1.c b/src/mame/drivers/namconb1.c
index b3b498b8ffc..e3709385ce6 100644
--- a/src/mame/drivers/namconb1.c
+++ b/src/mame/drivers/namconb1.c
@@ -1126,7 +1126,7 @@ static MACHINE_CONFIG_START( namconb1, namconb1_state )
 	MCFG_VIDEO_START_OVERRIDE(namconb1_state,namconb1)
 
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
-	MCFG_C352_ADD("c352", MASTER_CLOCK/2, C352_DIVIDER_S22)
+	MCFG_C352_ADD("c352", MASTER_CLOCK/2, 288)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
@@ -1163,7 +1163,7 @@ static MACHINE_CONFIG_START( namconb2, namconb1_state )
 	MCFG_VIDEO_START_OVERRIDE(namconb1_state,namconb2)
 
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
-	MCFG_C352_ADD("c352", MASTER_CLOCK/2, C352_DIVIDER_S22)
+	MCFG_C352_ADD("c352", MASTER_CLOCK/2, 288)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
diff --git a/src/mame/drivers/namcond1.c b/src/mame/drivers/namcond1.c
index 8da4a1987ad..001dc56e65c 100644
--- a/src/mame/drivers/namcond1.c
+++ b/src/mame/drivers/namcond1.c
@@ -319,7 +319,7 @@ static MACHINE_CONFIG_START( namcond1, namcond1_state )
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_C352_ADD("c352", XTAL_49_152MHz/2, C352_DIVIDER_S22)
+	MCFG_C352_ADD("c352", XTAL_49_152MHz/2, 288)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
diff --git a/src/mame/drivers/namcos11.c b/src/mame/drivers/namcos11.c
index 8bef7bff55d..3db5ea0863d 100644
--- a/src/mame/drivers/namcos11.c
+++ b/src/mame/drivers/namcos11.c
@@ -571,7 +571,7 @@ static MACHINE_CONFIG_START( coh110, namcos11_state )
 
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_C352_ADD("c352", 20013200, C352_DIVIDER_S11)
+	MCFG_C352_ADD("c352", 20013200, 228)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
diff --git a/src/mame/drivers/namcos12.c b/src/mame/drivers/namcos12.c
index e9e78d58c61..dbaab512aad 100644
--- a/src/mame/drivers/namcos12.c
+++ b/src/mame/drivers/namcos12.c
@@ -1591,7 +1591,7 @@ static MACHINE_CONFIG_START( coh700, namcos12_state )
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_C352_ADD("c352", 29168000, C352_DIVIDER_S12)
+	MCFG_C352_ADD("c352", 29168000, 332)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
diff --git a/src/mame/drivers/namcos22.c b/src/mame/drivers/namcos22.c
index dab1ca4d7e4..7adcf81887b 100644
--- a/src/mame/drivers/namcos22.c
+++ b/src/mame/drivers/namcos22.c
@@ -3781,7 +3781,7 @@ static MACHINE_CONFIG_START( namcos22, namcos22_state )
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_C352_ADD("c352", SS22_MASTER_CLOCK/2, C352_DIVIDER_S22)
+	MCFG_C352_ADD("c352", SS22_MASTER_CLOCK/2, 288)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
@@ -3830,7 +3830,7 @@ static MACHINE_CONFIG_START( namcos22s, namcos22_state )
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_C352_ADD("c352", SS22_MASTER_CLOCK/2, C352_DIVIDER_S22)
+	MCFG_C352_ADD("c352", SS22_MASTER_CLOCK/2, 288)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
diff --git a/src/mame/drivers/namcos23.c b/src/mame/drivers/namcos23.c
index 789b7b93c16..26394d2998e 100644
--- a/src/mame/drivers/namcos23.c
+++ b/src/mame/drivers/namcos23.c
@@ -1247,7 +1247,8 @@ Notes:
 #define JVSCLOCK    (XTAL_14_7456MHz)
 #define H8CLOCK     (16737350)      /* from 2061 */
 #define BUSCLOCK    (16737350*2)    /* 33MHz CPU bus clock / input */
-#define C352CLOCK   (25992000)  /* measured at 25.992MHz from 2061 pin 9 (C352 divider is 296) */
+#define C352CLOCK   (25992000)  /* measured at 25.992MHz from 2061 pin 9  */
+#define C352DIV		(296)
 #define VSYNC1      (59.8824)
 #define VSYNC2      (59.915)
 #define HSYNC       (16666150)
@@ -3320,7 +3321,7 @@ static MACHINE_CONFIG_START( gorgon, namcos23_state )
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_C352_ADD("c352", C352CLOCK, C352_DIVIDER_S23)
+	MCFG_C352_ADD("c352", C352CLOCK, C352DIV)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
@@ -3389,7 +3390,7 @@ static MACHINE_CONFIG_START( s23, namcos23_state )
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_C352_ADD("c352", C352CLOCK, C352_DIVIDER_S23)
+	MCFG_C352_ADD("c352", C352CLOCK, C352DIV)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)
@@ -3469,7 +3470,7 @@ static MACHINE_CONFIG_START( ss23, namcos23_state )
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_C352_ADD("c352", C352CLOCK, C352_DIVIDER_S23)
+	MCFG_C352_ADD("c352", C352CLOCK, C352DIV)
 	MCFG_SOUND_ROUTE(0, "rspeaker", 1.00)
 	MCFG_SOUND_ROUTE(1, "lspeaker", 1.00)
 	MCFG_SOUND_ROUTE(2, "rspeaker", 1.00)

From 96393f2fc16a76ac70ad39c6c7e6d52aa49dcf0a Mon Sep 17 00:00:00 2001
From: Ian Karlsson <themvrules@gmail.com>
Date: Wed, 22 Jul 2015 22:07:16 +0200
Subject: [PATCH 3/3] c352: forgot the note/nw

---
 src/emu/sound/c352.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/emu/sound/c352.c b/src/emu/sound/c352.c
index a28f332a786..98f8f3a9fed 100644
--- a/src/emu/sound/c352.c
+++ b/src/emu/sound/c352.c
@@ -13,6 +13,14 @@
     Supports 8-bit linear and 8-bit muLaw samples
     Output: digital, 16 bit, 4 channels
     Output sample rate is the input clock / (288 * 2).
+	
+    superctr: The clock divider appears to be configurable for each system.
+    Below is a list of the divider values followed by the systems that use it.
+	
+    * 228: System 11.
+    * 288: System 22, Super 22, NB-1/2, ND-1, FL.
+    * 296: System 23, Super 23.
+    * 332: System 12.
  */
 
 #include "emu.h"