diff --git a/src/mame/includes/model2.h b/src/mame/includes/model2.h
index 6d1fcb26b38..d1c96c20099 100644
--- a/src/mame/includes/model2.h
+++ b/src/mame/includes/model2.h
@@ -25,7 +25,6 @@ public:
 		m_maincpu(*this,"maincpu"),
 		m_dsbz80(*this, DSBZ80_TAG),
 		m_audiocpu(*this, "audiocpu"),
-		m_audiocpum1(*this, "audiocpum1"),
 		m_multipcm_1(*this, "sega1"),
 		m_multipcm_2(*this, "sega2"),
 		m_tgp(*this, "tgp"),
@@ -45,8 +44,7 @@ public:
 	
 	required_device<i960_cpu_device> m_maincpu;
 	optional_device<dsbz80_device> m_dsbz80;    // Z80-based MPEG Digital Sound Board
-	optional_device<cpu_device> m_audiocpu;
-	optional_device<cpu_device> m_audiocpum1;
+	required_device<cpu_device> m_audiocpu;
 	optional_device<multipcm_device> m_multipcm_1;
 	optional_device<multipcm_device> m_multipcm_2;
 	optional_device<cpu_device> m_tgp;
diff --git a/src/mame/mame.lst b/src/mame/mame.lst
index e184dfee8f5..9861b0e5c71 100644
--- a/src/mame/mame.lst
+++ b/src/mame/mame.lst
@@ -4782,8 +4782,7 @@ srallyca        // 1995.02 Sega Rally Championship DX (Revision A)
 vcop2           // 1995.09 Virtua Cop 2
 vf2             // 1995.09 Virtua Fighter (Version 2.1)
 skytargt        // 1995.10 Sky Target
-manxtt          // 1995.11 Manx T.T. (Revision D)
-manxttc         // 1995.11 Manx T.T. (Revision C)
+manxtt          // 1995.11 Manx T.T. (Revision C)
 doaa            // 1996.11 Dead or Alive (Revision A)
 motoraid        // 1997.10 Motor Raid
 zeroguna        // 1997.12 Zero Gunner (Export)