diff --git a/src/mame/drivers/meritm.c b/src/mame/drivers/meritm.c
index d30dfb1fa9c..6d733b44bfb 100644
--- a/src/mame/drivers/meritm.c
+++ b/src/mame/drivers/meritm.c
@@ -1568,6 +1568,26 @@ ROM_START( megat4st ) /* Dallas DS1204V security key at U5 labeled 9255-51-01 U5
 	ROM_LOAD( "sc3981-0a.u51",  0x000, 0x117, CRC(4fc750d0) SHA1(d09ff7a8c66aeb5c49e9fec84bd1521e3f5d8d0a) )
 ROM_END
 
+ROM_START( megat4stg ) /* Dallas DS1204V security key at U5 labeled 9255-51-50 U5-B-RO1 C1996 MII */
+	ROM_REGION( 0x400000, "maincpu", 0 )
+	ROM_LOAD( "9255-41-01_u32-r0",  0x000000, 0x100000, CRC(f51ae565) SHA1(99c58063bfa24b4383c8b37a1eab670fa6e4c62c) ) /* Location U32 */
+	ROM_LOAD( "qs9255-02_u36-r0",   0x100000, 0x80000,  CRC(57322328) SHA1(12bc604c9d34cde431ef7cd2aa33c7b12ac01833) ) /* Location U36 */
+	ROM_RELOAD(                     0x180000, 0x80000)
+	ROM_LOAD( "qs9255-02_u37-r0",   0x200000, 0x80000,  CRC(f2e8bb4e) SHA1(5c5475b3c176a6aca9b2c6aa4aee422675d20bd1) ) /* Location U37 */
+	ROM_RELOAD(                     0x280000, 0x80000)
+	ROM_LOAD( "9255-51-50_u38-r0a", 0x300000, 0x080000, CRC(f7c2914d) SHA1(5d05b8db5ca734f7b05c3e215c0ef5b917455537) ) /* Location U38, 11/18/1996 10:11:01 - Bi-Lingual ENG/GER Version */
+	ROM_RELOAD(                     0x380000, 0x080000 )
+
+	ROM_REGION( 0x8000, "user1", 0 ) // DS1644 nv ram
+	ROM_LOAD( "mt4sgt_ds1644.u31",  0x00000,  0x8000,   CRC(7f6f8e57) SHA1(d65f20ae19afc05b33d7605143b8362d6e955e89) ) /* No actual label, so use a unique name for this set */
+
+	ROM_REGION( 0x1000, "user2", 0 ) // PALs
+	ROM_LOAD( "sc3943.u20",     0x000, 0x117, CRC(5a72fe78) SHA1(4b1a36904eb7048518507fe14bdade5c2589dbd7) )
+	ROM_LOAD( "sc3944-0a.u19",  0x000, 0x2dd, CRC(4cc46c5e) SHA1(0bab970df1539ce905f43603ad13171b05449a01) )
+	ROM_LOAD( "sc3980.u40",     0x000, 0x117, CRC(ee0cdab5) SHA1(216fef50a8a0f6a33b704d3501a4c5c3cbac2bad) )
+	ROM_LOAD( "sc3981-0a.u51",  0x000, 0x117, CRC(4fc750d0) SHA1(d09ff7a8c66aeb5c49e9fec84bd1521e3f5d8d0a) )
+ROM_END
+
 ROM_START( megat5 ) /* Dallas DS1204V security key at U5 labeled 9255-60-01 U5-C-RO1 C1998 MII */
 	ROM_REGION( 0x400000, "maincpu", 0 )
 	ROM_LOAD( "9255-60-01_u32-r0",  0x000000, 0x100000, CRC(f8f7f48e) SHA1(1bebe1f8898c60b795a0f794ca9b79e03d2744e4) )
@@ -1616,6 +1636,25 @@ ROM_START( megat5nj ) /* Dallas DS1204V security key at U5 labeled 9255-60-01 U5
 	ROM_LOAD( "sc3981-0a.u51",  0x000, 0x117, CRC(4fc750d0) SHA1(d09ff7a8c66aeb5c49e9fec84bd1521e3f5d8d0a) )
 ROM_END
 
+ROM_START( megat5tg ) /* Dallas DS1204V security key at U5 labeled 9255-70-50 U5-C-RO1 C1998 MII */
+	ROM_REGION( 0x400000, "maincpu", 0 )
+	ROM_LOAD( "9255-70-50_u32-r0",  0x000000, 0x100000, CRC(f57e4d36) SHA1(c16587c95fa1abe2e7df37027deb2cfbadb27038) )
+	ROM_LOAD( "qs9255-05_u36-r0",   0x100000, 0x80000,  CRC(0bed9e27) SHA1(1414385ce562b127e1ddeccc20ea4ff2a7098b7e) )
+	ROM_RELOAD(                     0x180000, 0x80000)
+	ROM_LOAD( "qs9255-05_u37-r0",   0x200000, 0x80000,  CRC(b713a1c5) SHA1(d6ccba2ea90fd0e2ecf15249514231eed54000c1) )
+	ROM_RELOAD(                     0x280000, 0x80000)
+	ROM_LOAD( "9255-70-50_u38-r0d", 0x300000, 0x100000, CRC(044d123f) SHA1(d73df1f97f6da03fdee2ca3fda3845ec262a0f9a) ) /* Location U38, 10/29/1997 10:19:08 - Bi-Lingual ENG/GER Version */
+
+	ROM_REGION( 0x8000, "user1", 0 ) // DS1644 nv ram
+	ROM_LOAD( "mt5tg_ds1644.u31",  0x00000,  0x8000,   CRC(a054bb32) SHA1(4efc19cb0a671dfe9249ce85d31f6bd633f2a237) ) /* No actual label, so use a unique name for this set */
+
+	ROM_REGION( 0x1000, "user2", 0 ) // PALs
+	ROM_LOAD( "sc3943.u20",     0x000, 0x117, CRC(5a72fe78) SHA1(4b1a36904eb7048518507fe14bdade5c2589dbd7) )
+	ROM_LOAD( "sc3944-0a.u19",  0x000, 0x2dd, CRC(4cc46c5e) SHA1(0bab970df1539ce905f43603ad13171b05449a01) )
+	ROM_LOAD( "sc3980.u40",     0x000, 0x117, CRC(ee0cdab5) SHA1(216fef50a8a0f6a33b704d3501a4c5c3cbac2bad) )
+	ROM_LOAD( "sc3981-0a.u51",  0x000, 0x117, CRC(4fc750d0) SHA1(d09ff7a8c66aeb5c49e9fec84bd1521e3f5d8d0a) )
+ROM_END
+
 ROM_START( megat6 ) /* Dallas DS1204V security key at U5 labeled 9255-80 U5-B-RO1 C1998 MII */
 	ROM_REGION( 0x400000, "maincpu", 0 )
 	ROM_LOAD( "9255-60-01_u32-r0",  0x000000, 0x100000, CRC(f8f7f48e) SHA1(1bebe1f8898c60b795a0f794ca9b79e03d2744e4) ) /* Location U32 */
@@ -1735,6 +1774,15 @@ static DRIVER_INIT(megat5)
 
 }
 
+static DRIVER_INIT(megat5tg)
+{
+	static const UINT8 megat5_ds1204_nvram[16] =
+		{ 0x08, 0x22, 0x97, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00 };
+
+	ds1204_init(machine, 0, megat5_ds1204_nvram);
+
+}
+
 static DRIVER_INIT(megat6)
 {
 	static const UINT8 megat6_ds1204_nvram[16] =
@@ -1769,7 +1817,9 @@ GAME( 1996, megat4sn,  megat4, meritm_crt260, meritm_crt260, megat4,   ROT0, "Me
 GAME( 1996, megat4te,  megat4, meritm_crt260, meritm_crt260, megat4te, ROT0, "Merit", "Megatouch IV Tournament Edition (9255-50-01 ROD, Standard version)", GAME_IMPERFECT_GRAPHICS )
 GAME( 1996, megat4tea, megat4, meritm_crt260, meritm_crt260, megat4te, ROT0, "Merit", "Megatouch IV Tournament Edition (9255-50-01 ROA, Standard version)", GAME_IMPERFECT_GRAPHICS )
 GAME( 1996, megat4st,  megat4, meritm_crt260, meritm_crt260, megat4st, ROT0, "Merit", "Super Megatouch IV Tournament Edition (9255-51-01 ROB, Standard version)", GAME_IMPERFECT_GRAPHICS )
+GAME( 1996, megat4stg, megat4, meritm_crt260, meritm_crt260, megat4st, ROT0, "Merit", "Super Megatouch IV Turnier Version (9255-51-50 ROA, Bi-Lingual ENG/GER version)", GAME_IMPERFECT_GRAPHICS )
 GAME( 1997, megat5,    0,      meritm_crt260, meritm_crt260, megat5,   ROT0, "Merit", "Megatouch 5 (9255-60-01 ROI, Standard version)", GAME_IMPERFECT_GRAPHICS )
 GAME( 1997, megat5a,   megat5, meritm_crt260, meritm_crt260, megat5,   ROT0, "Merit", "Megatouch 5 (9255-60-01 ROC, Standard version)", GAME_IMPERFECT_GRAPHICS|GAME_NOT_WORKING )
 GAME( 1998, megat5nj,  megat5, meritm_crt260, meritm_crt260, megat5,   ROT0, "Merit", "Megatouch 5 (9255-60-07 RON, New Jersey version)", GAME_IMPERFECT_GRAPHICS )
+GAME( 1998, megat5tg,  megat5, meritm_crt260, meritm_crt260, megat5tg, ROT0, "Merit", "Megatouch 5 Turnier Version (9255-70-50 RON, Bi-Lingual ENG/GER version)", GAME_IMPERFECT_GRAPHICS )
 GAME( 1998, megat6,    0,      meritm_crt260, meritm_crt260, megat6,   ROT0, "Merit", "Megatouch 6 (9255-80-01 ROA, Standard version)", GAME_IMPERFECT_GRAPHICS )
diff --git a/src/mame/mamedriv.c b/src/mame/mamedriv.c
index 065c50b2345..47886c53931 100644
--- a/src/mame/mamedriv.c
+++ b/src/mame/mamedriv.c
@@ -9193,9 +9193,11 @@ Other Sun games
 	DRIVER( megat4te )	/* (c) 1996 Merit */
 	DRIVER( megat4tea )	/* (c) 1996 Merit */
 	DRIVER( megat4st )	/* (c) 1996 Merit */
+	DRIVER( megat4stg )	/* (c) 1996 Merit */
 	DRIVER( megat5 )	/* (c) 1997 Merit */
 	DRIVER( megat5a )	/* (c) 1997 Merit */
 	DRIVER( megat5nj )	/* (c) 1997 Merit */
+	DRIVER( megat5tg )	/* (c) 1997 Merit */
 	DRIVER( megat6 )	/* (c) 1998 Merit */
 	DRIVER( suprgolf )	/* (c) 1989 Nasco */
 	DRIVER( hotblock )	/* (c) 1993 Nics? / Nix? */