diff --git a/src/mame/drivers/galaxold.c b/src/mame/drivers/galaxold.c
index 82e7ca78bfa..efc410aa135 100644
--- a/src/mame/drivers/galaxold.c
+++ b/src/mame/drivers/galaxold.c
@@ -365,7 +365,7 @@ TO DO :
  *
  *************************************/
 
-#define MASTER_CLOCK		(18432000)
+#define MASTER_CLOCK		(XTAL_18_432MHz)
 
 #define PIXEL_CLOCK			(MASTER_CLOCK/3)
 
@@ -2258,14 +2258,14 @@ static MACHINE_DRIVER_START( ozon1 )
 	MDRV_PALETTE_LENGTH(32)
 
 	MDRV_VIDEO_START(galaxold_plain)
-	MDRV_SOUND_ADD("ay", AY8910, 1789750)
+	MDRV_SOUND_ADD("ay", AY8910, PIXEL_CLOCK/4)
 	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
 MACHINE_DRIVER_END
 
 static MACHINE_DRIVER_START( drivfrcg )
 
 	/* basic machine hardware */
-	MDRV_CPU_ADD("maincpu", S2650, 18432000/6)
+	MDRV_CPU_ADD("maincpu", S2650, MASTER_CLOCK/6)
 	MDRV_CPU_PROGRAM_MAP(drivfrcg)
 	MDRV_CPU_IO_MAP(drivfrcg_io)
 	MDRV_CPU_VBLANK_INT("screen", hunchbks_vh_interrupt)
@@ -2302,7 +2302,7 @@ static MACHINE_DRIVER_START( bongo )
 	MDRV_VIDEO_START(bongo)
 	MDRV_VIDEO_UPDATE(galaxold)
 
-	MDRV_SOUND_ADD("ay", AY8910, 1789750)
+	MDRV_SOUND_ADD("ay", AY8910, PIXEL_CLOCK/4)
 	MDRV_SOUND_CONFIG(bongo_ay8910_interface)
 	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
 MACHINE_DRIVER_END
@@ -2340,7 +2340,7 @@ static MACHINE_DRIVER_START( harem )
 	MDRV_CPU_PROGRAM_MAP(harem_cpu1)
 	MDRV_CPU_VBLANK_INT("screen", nmi_line_pulse)
 
-	MDRV_CPU_ADD("audiocpu", Z80, 1620000)
+	MDRV_CPU_ADD("audiocpu", Z80, 1620000) //?
 	MDRV_CPU_PROGRAM_MAP(harem_cpu2)
 	MDRV_CPU_IO_MAP(harem_cpu2_io)
 
@@ -2351,13 +2351,13 @@ static MACHINE_DRIVER_START( harem )
 
 	MDRV_VIDEO_START(galaxold_plain)
 
-	MDRV_SOUND_ADD("ay1", AY8910, 2000000)
+	MDRV_SOUND_ADD("ay1", AY8910, 2000000) //?
 	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.33/3)
 
-	MDRV_SOUND_ADD("ay2", AY8910, 2000000)
+	MDRV_SOUND_ADD("ay2", AY8910, 2000000) //?
 	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.33/3)
 
-	MDRV_SOUND_ADD("ay3", AY8910, 2000000)
+	MDRV_SOUND_ADD("ay3", AY8910, 2000000) //?
 	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.33/3)
 MACHINE_DRIVER_END
 
diff --git a/src/mame/drivers/galdrvr.c b/src/mame/drivers/galdrvr.c
index f8fdfaa522f..8307d78c90b 100644
--- a/src/mame/drivers/galdrvr.c
+++ b/src/mame/drivers/galdrvr.c
@@ -5574,16 +5574,15 @@ GAME( 1979, galaxiant,  galaxian, galaxian, superg,   galaxian, ROT90,  "[Namco]
 
 /* straight Galaxian ripoffs on basic galaxian hardware */
 GAME( 1979, moonaln,  galaxian, galaxian, superg,   galaxian, ROT90,  "[Nichibutsu] (Karateco license)", "Moon Alien", GAME_SUPPORTS_SAVE )
-GAME( 1979, superg,   galaxian, galaxian, superg,   galaxian, ROT90,  "hack", "Super Galaxians (galaxiaj hack)", GAME_SUPPORTS_SAVE )
+GAME( 1979, superg,   galaxian, galaxian, superg,   galaxian, ROT90,  "hack", "Super Galaxians (galaxiana hack)", GAME_SUPPORTS_SAVE )
 GAME( 1979, galturbo, galaxian, galaxian, superg,   galaxian, ROT90,  "hack", "Galaxian Turbo (superg hack)", GAME_SUPPORTS_SAVE )
 GAME( 1979, galapx,   galaxian, galaxian, superg,   galaxian, ROT90,  "hack", "Galaxian Part X (moonaln hack)", GAME_SUPPORTS_SAVE )
-GAME( 1979, galap1,   galaxian, galaxian, superg,   galaxian, ROT90,  "hack", "Space Invaders Galactica (galaxiaj hack)", GAME_SUPPORTS_SAVE )
+GAME( 1979, galap1,   galaxian, galaxian, superg,   galaxian, ROT90,  "hack", "Space Invaders Galactica (galaxiana hack)", GAME_SUPPORTS_SAVE )
 GAME( 1979, galap4,   galaxian, galaxian, superg,   galaxian, ROT90,  "G.G.I", "Galaxian Part 4 (hack)", GAME_SUPPORTS_SAVE )
 GAME( 1979, swarm,    galaxian, galaxian, swarm,    galaxian, ROT90,  "Subelectro", "Swarm (bootleg?)", GAME_SUPPORTS_SAVE )
 GAME( 1979, zerotime, galaxian, galaxian, zerotime, galaxian, ROT90,  "Petaco S.A.", "Zero Time", GAME_SUPPORTS_SAVE )
 GAME( 1979, starfght, galaxian, galaxian, swarm,    galaxian, ROT90,  "Jeutel", "Star Fighter", GAME_SUPPORTS_SAVE )
 GAME( 1979, galaxbsf, galaxian, galaxian, galaxian, galaxian, ROT90,  "bootleg", "Galaxian (bootleg)", GAME_SUPPORTS_SAVE )
-GAME( 1979, kamakazi3,galaxian, galaxian, superg,   galaxian, ROT90,  "hack", "Kamakazi III (superg hack)", GAME_SUPPORTS_SAVE )
 GAME( 1980, supergx,  galaxian, galaxian, superg,   galaxian, ROT90,  "Nichibutsu", "Super GX", GAME_NOT_WORKING | GAME_WRONG_COLORS | GAME_SUPPORTS_SAVE )
 GAME( 19??, tst_galx, galaxian, galaxian, galaxian, galaxian, ROT90,  "Test ROM", "Galaxian Test ROM", GAME_SUPPORTS_SAVE )
 
@@ -5600,6 +5599,7 @@ GAME( 1981, warofbug, 0,        galaxian, warofbug, nolock,   ROT90,  "Armenia",
 GAME( 1981, redufo,   0,        galaxian, redufo,   nolock,   ROT90,  "bootleg", "Defend the Terra Attack on the Red UFO", GAME_SUPPORTS_SAVE )
 GAME( 19??, exodus,   redufo,   galaxian, exodus,   nolock,   ROT90,  "Subelectro", "Exodus (bootleg?)", GAME_SUPPORTS_SAVE )
 GAME( 1983, tdpgal,   0,        galaxian, tdpgal,   nolock,   ROT90,  "Design Labs / Thomas Automatics", "Triple Draw Poker", GAME_SUPPORTS_SAVE )
+GAME( 1979, kamakazi3,galaxian, galaxian, superg,   nolock,	  ROT90,  "hack", "Kamakazi III (superg hack)", GAME_SUPPORTS_SAVE )
 
 /* different bullet color */
 GAME( 1982, azurian,  0,        galaxian, azurian,  azurian,  ROT90,  "Rait Electronics Ltd", "Azurian Attack", GAME_SUPPORTS_SAVE )