diff --git a/src/mame/drivers/naomi.c b/src/mame/drivers/naomi.c
index 70673f95db1..6eeeff552dc 100644
--- a/src/mame/drivers/naomi.c
+++ b/src/mame/drivers/naomi.c
@@ -3550,10 +3550,10 @@ GAME( 2005, senko,     naomigd,  naomigd,  naomi, naomigd,   ROT0,   "Grev",
 GAME( 2005, senkoo,    senko,    naomigd,  naomi, naomigd,   ROT0,   "Grev",         "Senko No Ronde (GDL-0030)", GAME_NO_SOUND|GAME_NOT_WORKING )
 GAME( 2005, ss2005,    naomigd,  naomigd,  naomi, naomigd,   ROT0,   "Starfish",     "Super Shanghai 2005 (GDL-0031A)", GAME_NO_SOUND|GAME_NOT_WORKING )
 GAME( 2005, ggxxsla,   naomigd,  naomigd,  naomi, ggxxsla,   ROT0,   "Arc System Works",       "Guilty Gear XX Slash (GDL-0033A)", GAME_NO_SOUND|GAME_NOT_WORKING )
-GAME( 2005, undefeat,  naomigd,  naomigd,  naomi, naomigd,   ROT0,   "GRev",         "Under Defeat (GDL-0035)", GAME_NO_SOUND|GAME_NOT_WORKING )
+GAME( 2005, undefeat,  naomigd,  naomigd,  naomi, naomigd,   ROT0,   "G-Rev",         "Under Defeat (GDL-0035)", GAME_NO_SOUND|GAME_NOT_WORKING )
 GAME( 2005, trgheart,  naomigd,  naomigd,  naomi, naomigd,   ROT0,   "Warashi",      "Trigger Heart Exelica (GDL-0036A)", GAME_NO_SOUND|GAME_NOT_WORKING )
 GAME( 2005, jingystm,  naomigd,  naomigd,  naomi, naomigd,   ROT0,   "Yuki Enterprise",      "Jingi Storm - The Arcade (GDL-0037)", GAME_NO_SOUND|GAME_NOT_WORKING )
-GAME( 2005, cfield,    naomigd,  naomigd,  naomi, naomigd,   ROT0,   "Able",      "Chaos Field (GDL-0025)", GAME_NO_SOUND|GAME_NOT_WORKING )
+GAME( 2004, cfield,    naomigd,  naomigd,  naomi, naomigd,   ROT0,   "Able",      "Chaos Field (GDL-0025)", GAME_NO_SOUND|GAME_NOT_WORKING )
 
 
 
@@ -3570,7 +3570,7 @@ GAME( 2001, wsbbgd,    naomigd,  naomigd,  naomi, naomigd,  ROT0, "Sega",
 GAME( 2001, vtennisg,  naomigd,  naomigd,  naomi, naomigd,  ROT0, "Sega",          "Virtua Tennis (GDS-0011)", GAME_NO_SOUND|GAME_NOT_WORKING )
 GAME( 2002, vathlete,  naomigd,  naomigd,  naomi, naomigd,  ROT0, "Sega",          "Virtua Athletics / Virtua Athlete (GDS-0019)", GAME_NO_SOUND|GAME_NOT_WORKING )
 GAME( 2001, vtennis2,  naomigd,  naomigd,  naomi, naomigd,  ROT0, "Sega",          "Virtua Tennis 2 (GDS-0015a)", GAME_NO_SOUND|GAME_NOT_WORKING )
-GAME( 2001, keyboard,  naomigd,  naomigd,  naomi, naomigd,  ROT0, "Sega",          "La Keyboard XYZ (GDS-0017)", GAME_NO_SOUND|GAME_NOT_WORKING )
+GAME( 2001, keyboard,  naomigd,  naomigd,  naomi, naomigd,  ROT0, "Sega",          "La Keyboardxyu (GDS-0017)", GAME_NO_SOUND|GAME_NOT_WORKING )
 GAME( 2001, lupinsho,  naomigd,  naomigd,  naomi, naomigd,  ROT0, "Sega",          "Lupin The Third - The Shooting (GDS-0018)", GAME_NO_SOUND|GAME_NOT_WORKING )
 GAME( 2002, luptype,   naomigd,  naomigd,  naomi, naomigd,  ROT0, "Sega",          "Lupin The Third - The Typing (GDS-0021A)", GAME_NO_SOUND|GAME_NOT_WORKING )
 GAME( 2002, mok,       naomigd,  naomigd,  naomi, naomigd,  ROT0, "Sega",          "The Maze of the Kings (GDS-0022)", GAME_NO_SOUND|GAME_NOT_WORKING )
diff --git a/src/mame/mamedriv.c b/src/mame/mamedriv.c
index 6244703bb12..c403ce9ecd8 100644
--- a/src/mame/mamedriv.c
+++ b/src/mame/mamedriv.c
@@ -4346,7 +4346,7 @@ BOMULEUL CHAJARA SEGA ST-V  1997/04/11
 						/* 2001.10 Derby Owners Club 2 */
 						/* 2001.10 Inu no Osanpo */
 	DRIVER( vtennis2 )  /* 2001.10 Power Smash 2 / Virtua Tennis 2 */
-	DRIVER( keyboard )	/* 2001.11 La Keyboardu */
+	DRIVER( keyboard )	/* 2001.11 La Keyboardxyu */
 						/* 2001.11 Shakatto Tambourine Cho Powerup Chu */
 	DRIVER( ikaruga )	/* 2001.12 Ikaruga */
 	DRIVER( lupinsho )	/* 2001.12 Lupin the Third the Shooting */
@@ -4367,6 +4367,7 @@ BOMULEUL CHAJARA SEGA ST-V  1997/04/11
 	DRIVER( bdrdown )	/* 2003.04 Border Down */
 	DRIVER( psyvar2 )	/* 2003.11 Psyvariar 2 */
 	DRIVER( puyofev	)	/* 2003.11 Puyopuyo Fever */
+	DRIVER( cfield )	/* 2004.06 Chaos Field */
 	DRIVER( trizeal )	/* 2004.09 Trizeal */
 	DRIVER( meltybld )	/* 2005.03 Melty Blood Act Cadenza */
 	DRIVER( ss2005 )	/* 2005.04 Super Shanghai 2005 */
@@ -4385,7 +4386,6 @@ BOMULEUL CHAJARA SEGA ST-V  1997/04/11
 						/* 2006.12 Guilty Gear XX Accent Core */
 						/* 2006.12 Melty Blood Act Cadenza ver.B */
 						/* 2007.02 Noukone Puzzle Takoron */
-	DRIVER( cfield )	/* 200?.?? Chaos Field */
 
 						/* Releases below use flash/mask ROMs like older NAOMI titles, not GD-ROM as GD-ROM Hardware (Drives and Discs) were no longer being produced */