diff --git a/src/mame/drivers/model2.c b/src/mame/drivers/model2.c
index 54163ffea74..be840817506 100644
--- a/src/mame/drivers/model2.c
+++ b/src/mame/drivers/model2.c
@@ -1013,6 +1013,11 @@ WRITE32_MEMBER(model2_state::model2_serial_w)
 {
 	if (ACCESSING_BITS_0_7 && (offset == 0))
 	{
+		if (m_dsbz80 != NULL)
+		{
+			m_dsbz80->latch_w(space, 0, data&0xff);
+		}
+
 		scsp_midi_in(machine().device("scsp"), space, 0, data&0xff, 0);
 
 		// give the 68k time to notice
@@ -2220,6 +2225,12 @@ static MACHINE_CONFIG_START( model2c, model2_state )
 	MCFG_SOUND_ROUTE(0, "rspeaker", 2.0)
 MACHINE_CONFIG_END
 
+static MACHINE_CONFIG_DERIVED( stcc, model2c )
+    MCFG_DSBZ80_ADD(DSBZ80_TAG)
+	MCFG_SOUND_ROUTE(0, "lspeaker", 1.0)
+	MCFG_SOUND_ROUTE(1, "rspeaker", 1.0)
+MACHINE_CONFIG_END
+
 /* ROM definitions */
 
 /*
@@ -3379,8 +3390,8 @@ ROM_START( stcc ) /* Sega Touring Car Championship, Model 2C - Defaults to Japan
 	ROM_REGION( 0x100000, "audiocpu", 0 ) // Sound program
 	ROM_LOAD16_WORD_SWAP("epr-19274.31", 0x080000,  0x20000, CRC(2dcc08ae) SHA1(bad26e2c994f2d4db5d9be0e34cf21a8bf5aa7e9) )
 
-	ROM_REGION( 0x20000, "cpu3", 0) // DSB program
-	ROM_LOAD16_WORD_SWAP("epr-19275.2s", 0x000000,  0x20000, CRC(ee809d3f) SHA1(347080858fbfe9955002f382603a1b86a52d26d5) )
+	ROM_REGION( 0x20000, "mpegcpu", 0) // DSB program
+	ROM_LOAD("epr-19275.2s", 0x000000,  0x20000, CRC(ee809d3f) SHA1(347080858fbfe9955002f382603a1b86a52d26d5) )
 
 	ROM_REGION( 0x20000, "cpu4", 0) // Communication program
 	ROM_LOAD16_WORD_SWAP("epr-18643a.7", 0x000000,  0x20000, CRC(b5e048ec) SHA1(8182e05a2ffebd590a936c1359c81e60caa79c2a))
@@ -3438,8 +3449,8 @@ ROM_START( stcca ) /* Sega Touring Car Championship Revision A, Model 2C - Defau
 	ROM_REGION( 0x100000, "audiocpu", 0 ) // Sound program
 	ROM_LOAD16_WORD_SWAP("epr-19274.31", 0x080000,  0x20000, CRC(2dcc08ae) SHA1(bad26e2c994f2d4db5d9be0e34cf21a8bf5aa7e9) )
 
-	ROM_REGION( 0x20000, "cpu3", 0) // DSB program
-	ROM_LOAD16_WORD_SWAP("epr-19275.2s", 0x000000,  0x20000, CRC(ee809d3f) SHA1(347080858fbfe9955002f382603a1b86a52d26d5) )
+	ROM_REGION( 0x20000, "mpegcpu", 0) // DSB program
+	ROM_LOAD("epr-19275.2s", 0x000000,  0x20000, CRC(ee809d3f) SHA1(347080858fbfe9955002f382603a1b86a52d26d5) )
 
 	ROM_REGION( 0x20000, "cpu4", 0) // Communication program
 	ROM_LOAD16_WORD_SWAP("epr-18643a.7", 0x000000,  0x20000, CRC(b5e048ec) SHA1(8182e05a2ffebd590a936c1359c81e60caa79c2a))
@@ -3497,7 +3508,7 @@ ROM_START( stccb ) /* Sega Touring Car Championship Revision unknown, Model 2C -
 	ROM_REGION( 0x100000, "audiocpu", 0 ) // Sound program
 	ROM_LOAD16_WORD_SWAP("epr-19274.31", 0x080000,  0x20000, CRC(2dcc08ae) SHA1(bad26e2c994f2d4db5d9be0e34cf21a8bf5aa7e9) )
 
-	ROM_REGION( 0x20000, "cpu3", 0) // DSB program
+	ROM_REGION( 0x20000, "mpegcpu", 0) // DSB program
 	ROM_LOAD16_WORD_SWAP("epr-19275.2s", 0x000000,  0x20000, CRC(ee809d3f) SHA1(347080858fbfe9955002f382603a1b86a52d26d5) )
 
 	ROM_REGION( 0x20000, "cpu4", 0) // Communication program
@@ -5379,9 +5390,9 @@ GAME( 1995, rchase2,         0, model2b, rchase2, model2_state,rchase2, ROT0, "S
 
 // Model 2C-CRX (TGPx4, SCSP sound board)
 GAME( 1996, skisuprg,        0, model2c, model2, driver_device, 0,       ROT0, "Sega", "Sega Ski Super G", GAME_NOT_WORKING|GAME_IMPERFECT_GRAPHICS )
-GAME( 1996, stcc,            0, model2c, model2, driver_device, 0,       ROT0, "Sega", "Sega Touring Car Championship", GAME_NOT_WORKING|GAME_IMPERFECT_GRAPHICS )
-GAME( 1996, stcca,        stcc, model2c, model2, driver_device, 0,       ROT0, "Sega", "Sega Touring Car Championship (Revision A)", GAME_NOT_WORKING|GAME_IMPERFECT_GRAPHICS )
-GAME( 1996, stccb,        stcc, model2c, model2, driver_device, 0,       ROT0, "Sega", "Sega Touring Car Championship (Unknown Revision)", GAME_NOT_WORKING|GAME_IMPERFECT_GRAPHICS )
+GAME( 1996, stcc,            0,    stcc, model2, driver_device, 0,       ROT0, "Sega", "Sega Touring Car Championship", GAME_NOT_WORKING|GAME_IMPERFECT_GRAPHICS )
+GAME( 1996, stcca,        stcc,    stcc, model2, driver_device, 0,       ROT0, "Sega", "Sega Touring Car Championship (Revision A)", GAME_NOT_WORKING|GAME_IMPERFECT_GRAPHICS )
+GAME( 1996, stccb,        stcc,    stcc, model2, driver_device, 0,       ROT0, "Sega", "Sega Touring Car Championship (Unknown Revision)", GAME_NOT_WORKING|GAME_IMPERFECT_GRAPHICS )
 GAME( 1996, waverunr,        0, model2c, model2, driver_device, 0,       ROT0, "Sega", "Wave Runner (Japan, Revision A)", GAME_NOT_WORKING|GAME_IMPERFECT_GRAPHICS )
 GAME( 1997, hotd,            0, model2c, model2, driver_device, 0,       ROT0, "Sega", "House of the Dead", GAME_NOT_WORKING|GAME_IMPERFECT_GRAPHICS )
 GAME( 1997, overrev,         0, model2c, srallyc, model2_state,overrev, ROT0, "Jaleco", "Over Rev (Model 2C, Revision A)", GAME_NOT_WORKING|GAME_IMPERFECT_GRAPHICS )
diff --git a/src/mame/includes/model2.h b/src/mame/includes/model2.h
index 0bcb3ae50c7..fafbe394507 100644
--- a/src/mame/includes/model2.h
+++ b/src/mame/includes/model2.h
@@ -1,5 +1,5 @@
 #include "video/poly.h"
-
+#include "audio/dsbz80.h"
 
 struct raster_state;
 struct geo_state;
@@ -19,6 +19,7 @@ public:
 		m_textureram1(*this, "textureram1"),
 		m_lumaram(*this, "lumaram"),
 		m_soundram(*this, "soundram"),
+        m_dsbz80(*this, DSBZ80_TAG),
 		m_tgp_program(*this, "tgp_program"){ }
 
 	required_device<cpu_device> m_maincpu;
@@ -30,6 +31,7 @@ public:
 	required_shared_ptr<UINT32> m_textureram1;
 	required_shared_ptr<UINT32> m_lumaram;
 	optional_shared_ptr<UINT16> m_soundram;
+    optional_device<dsbz80_device> m_dsbz80;    // Z80-based MPEG Digital Sound Board
 	optional_shared_ptr<UINT32> m_tgp_program;
 
 	UINT32 m_intreq;