diff --git a/src/mame/drivers/champbas.c b/src/mame/drivers/champbas.c
index dae0d3314cd..ee89c6613b6 100644
--- a/src/mame/drivers/champbas.c
+++ b/src/mame/drivers/champbas.c
@@ -667,16 +667,17 @@ static MACHINE_DRIVER_START( exctsccr )
 	/* sound hardware */
 	MDRV_SPEAKER_STANDARD_MONO("mono")
 
-	MDRV_SOUND_ADD("ay1", AY8910, 1500000) /* AY clock is specified by VR (0.9 - 3.9 MHz) */
+	/* AY (melody) clock is specified by VR (0.9 - 3.9 MHz), which is it? */
+	MDRV_SOUND_ADD("ay1", AY8910, XTAL_14_31818MHz/8)
 	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.08)
 
-	MDRV_SOUND_ADD("ay2", AY8910, 1500000)
+	MDRV_SOUND_ADD("ay2", AY8910, XTAL_14_31818MHz/8)
 	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.08)
 
-	MDRV_SOUND_ADD("ay3", AY8910, 1500000)
+	MDRV_SOUND_ADD("ay3", AY8910, XTAL_14_31818MHz/8)
 	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.08)
 
-	MDRV_SOUND_ADD("ay4", AY8910, 1500000)
+	MDRV_SOUND_ADD("ay4", AY8910, XTAL_14_31818MHz/8)
 	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.08)
 
 	MDRV_SOUND_ADD("dac1", DAC, 0)
diff --git a/src/mame/drivers/naomi.c b/src/mame/drivers/naomi.c
index a22669e9329..a81f3af0137 100644
--- a/src/mame/drivers/naomi.c
+++ b/src/mame/drivers/naomi.c
@@ -4415,7 +4415,7 @@ ROM_START( wangmid2 )
 	ROM_LOAD("gdx-0015.data", 0x00, 0x50, CRC(75c716aa) SHA1(5c2bcf3d28a80b336c6882d5aeb010d04327f8c1) )
 ROM_END
 
-ROM_START( netwaak3 )
+ROM_START( mj3 )
 	CHIHIRO_BIOS
 
 	ROM_REGION( 0x20000000, "user1", ROMREGION_ERASE) // allocate max size in init instead?
@@ -4433,6 +4433,6 @@ GAME( 2005, wangmid,  chihiro, naomigd,    naomi,    0, ROT0, "Sega",
 GAME( 2005, wangmid2, chihiro, naomigd,    naomi,    0, ROT0, "Sega",           "Wangan Midnight Maximum Tune 2 (Japan?) (GDX-0015)", GAME_NO_SOUND|GAME_NOT_WORKING )
 GAME( 2005, ghostsqu, chihiro, naomigd,    naomi,    0, ROT0, "Sega",           "Ghost Squad (Ver. A?) (GDX-0012A)", GAME_NO_SOUND|GAME_NOT_WORKING )
 GAME( 2003, vcop3,    chihiro, naomigd,    naomi,    0, ROT0, "Sega",           "Virtua Cop 3 (GDX-0003A)", GAME_NO_SOUND|GAME_NOT_WORKING )
-GAME( 2005, netwaak3, chihiro, naomigd,    naomi,    0, ROT0, "Sega",           "Sega Netto Waaku Taisen Maajan MJ 3 (Rev D) [GDX-0017D]", GAME_NO_SOUND|GAME_NOT_WORKING )
+GAME( 2005, mj3,      chihiro, naomigd,    naomi,    0, ROT0, "Sega",           "Sega Network Taisen Mahjong MJ 3 (Rev D) [GDX-0017D]", GAME_NO_SOUND|GAME_NOT_WORKING )
 
 
diff --git a/src/mame/mamedriv.c b/src/mame/mamedriv.c
index 2ac27e6b8ec..e7d2d09d1bf 100644
--- a/src/mame/mamedriv.c
+++ b/src/mame/mamedriv.c
@@ -4504,7 +4504,11 @@ BOMULEUL CHAJARA SEGA ST-V  1997/04/11
 						/* 2004.07 Avalon no Kagi ver.1.30 Konton no Utage */
 	DRIVER( vs4 )		/* 2004.10 Virtua Striker 4 */
 						/* 2004.11 Avalon no Kagi ver.2.0 Chitsujo to Kairitsu */
+						/* 2005.04 Virtua Striker 4 ver.A */
 						/* 2005.08 Avalon no Kagi ver.2.5 Kagi Seisen */
+						/* 2005.12 Mario Kart Arcade Grand Prix */
+						/* 2006.05 Virtua Striker 4 ver.2006 */
+						/* 2007.03 Mario Kart Arcade Grand Prix 2 */
 
 	DRIVER( tfupdate )	/* Triforce GDROM Boot Update (GDT-0011) */
 
@@ -4523,26 +4527,38 @@ BOMULEUL CHAJARA SEGA ST-V  1997/04/11
 						/* 2004.11 Sega Golf Club Network Pro Tour */
 						/* 2004.12 Sega Network Taisen Mahjong MJ 2 ver.D */
 						/* 2004.12 Outrun 2 Special Tours */
+						/* 2004.12 Quest of D ver.1.02 */
 						/* 2004.12 Quest of D ver.1.10 */
 	DRIVER( ghostsqu )	/* 2004.12 Ghost Squad */
 						/* 2005.03 Kidou Senshi Gundam Battle Operating Simulator */
 						/* 2005.03 Sangokushi Taisen */
 	DRIVER( wangmid2 )	/* 2005.04 Wangan Midnight Maximum Tune 2 */
 						/* 2005.04 Sega Network Taisen Mahjong MJ 2 ver.E */
-						/* 2005.05 Quest of D ver.1.20 */
+						/* 2005.04 Quest of D ver.1.20 */
+						/* 2005.04 Quest of D ver.1.20a */
 						/* 2005.06 Sega Golf Club Network Pro Tour 2005 */
+						/* 2005.06 Sangokushi Taisen ver.1.003 */
 						/* 2005.09 Quest of D ver.1.21 */
 						/* 2005.10 Sangokushi Taisen Ranse no Gunrou ver.1.100 */
 						/* 2005.10 Wangan Midnight Maximum Tune 2 ver.B */
 						/* 2005.12 Kidou Senshi Gundam 0079 Card Builder */
+						/* 2005.12 Quest of D ver.2.00 Gofu no Keisyousya */
 						/* 2005.12 Quest of D ver.2.01 Gofu no Keisyousya */
 						/* 2005.12 Sega Golf Club 2006 Next Tours */
-	DRIVER( netwaak3)	/* 2005.12 Sega Network Taisen Mahjong MJ 3 */
+	DRIVER( mj3 )		/* 2005.12 Sega Network Taisen Mahjong MJ 3 */
+						/* 2006.02 Sangokushi Taisen Ranse no Gunrou ver.1.12 */
+						/* 2006.03 Quest of D ver.2.01 Gofu no Keisyousya ver.2.02b */
 						/* 2006.05 Sangokushi Taisen 2 */
 						/* 2006.09 Sega Network Taisen Mahjong MJ 3 ver.B */
+						/* 2006.10 Quest of D ver.3.00 Oukoku no Syugosya */
+						/* 2006.11 Quest of D ver.3.01 Oukoku no Syugosya */
 						/* 2007.03 Kidou Senshi Gundam 0083 Card Builder */
 						/* 2007.03 Sega Network Taisen Mahjong MJ 3 Evolution */
 						/* 2007.10 Kidou Senshi Gundam 0083 Card Builder Ryouyuu Gekitotsu */
+						/* 2007.11 Quest of D The Battle Kingdom ver.4.00 */
+						/* 2008.01 Quest of D The Battle Kingdom ver.4.00b */
+						/* 2008.02 Quest of D The Battle Kingdom ver.4.00c */
+						/* 2008.06 Quest of D The Battle Kingdom ver.4.01 */
 
 	DRIVER( hshavoc )	/* (c) 1993 Data East */