diff --git a/src/mame/drivers/galgames.cpp b/src/mame/drivers/galgames.cpp
index 7681b9c3c22..2ec6d8b1d48 100644
--- a/src/mame/drivers/galgames.cpp
+++ b/src/mame/drivers/galgames.cpp
@@ -996,8 +996,7 @@ static MACHINE_CONFIG_START( galgames_base, galgames_state )
 
 	// sound hardware
 	MCFG_SPEAKER_STANDARD_MONO("mono")
-
-	MCFG_OKIM6295_ADD("oki", XTAL_24MHz / 8, OKIM6295_PIN7_LOW) // clock frequency & pin 7 not verified
+	MCFG_OKIM6295_ADD("oki", XTAL_24MHz / 16, OKIM6295_PIN7_HIGH) // clock frequency & pin 7 not verified (voices in galgame4 seem ok)
 	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
 MACHINE_CONFIG_END
 
@@ -1180,7 +1179,42 @@ ROM_START( galgame3 )
 	GALGAMES_MB_PALS
 ROM_END
 
+/***************************************************************************
 
-GAME( 1998, galgbios, 0,        galgbios, galgames, driver_device, 0,        ROT0, "Creative Electronics & Software",         "Galaxy Games BIOS",                      MACHINE_IS_BIOS_ROOT )
-GAME( 1998, galgame2, galgbios, galgame2, galgames, driver_device, 0,        ROT0, "Creative Electronics & Software / Namco", "Galaxy Games StarPak 2",                 0 )
-GAME( 1998, galgame3, galgbios, galgame3, galgames, driver_device, 0,        ROT0, "Creative Electronics & Software / Atari", "Galaxy Games StarPak 3",                 0 )
+Galaxy Games StarPak 4
+(These are not dumps, but files for the dev board provided by the developer)
+
+***************************************************************************/
+
+ROM_START( galgame4 )
+	ROM_REGION16_BE( 0x200000, "cart0", 0 )
+	GALGAMES_BIOS_ROMS
+
+	ROM_REGION( 0x800000, "cart1", 0 )
+	ROM_LOAD16_BYTE( "sp4.u2",  0x000000, 0x100000, CRC(e51bc5e1) SHA1(dacf6cefd792713b34382b827952b66e2cb5c2b4) ) // JANUARY 12, 1998
+	ROM_LOAD16_BYTE( "sp4.u1",  0x000001, 0x100000, CRC(695ab775) SHA1(e88d5f982df19e70be6124e6fdf20830475641e0) ) // ""
+	ROM_LOAD16_BYTE( "sp4.u6",  0x200000, 0x100000, CRC(7716895d) SHA1(8f86ffe2d94d3e756a3b7661d480e3a8c53cf178) )
+	ROM_LOAD16_BYTE( "sp4.u5",  0x200001, 0x100000, CRC(6c699ba3) SHA1(f675997e1b808758f79a21b883161526242990b4) )
+	ROM_LOAD16_BYTE( "sp4.u8",  0x400000, 0x100000, CRC(cdf45446) SHA1(da4e1667c7c47239e770018a7d3b8c1e4e2f4a63) )
+	ROM_LOAD16_BYTE( "sp4.u7",  0x400001, 0x100000, CRC(813c46c8) SHA1(3fd4192ec7e8d5e6bfbc2a37d9b4bbebe6132b99) )
+	ROM_LOAD16_BYTE( "sp4.u10", 0x600000, 0x100000, CRC(52dbf088) SHA1(da7c37366e884f40f1dea243d4aea0b2d2b314db) )
+	ROM_LOAD16_BYTE( "sp4.u9",  0x600001, 0x100000, CRC(9ded1dc2) SHA1(5319edfccf47d02dfd3664cb3782cc2281c769c4) )
+
+	ROM_REGION( 0x2000, "cart1:pic", 0 )
+	ROM_LOAD( "sp4.pic", 0x000, 0x2000, CRC(008ef1ba) SHA1(4065fcf00922de3e629084f4f4815355f271c954) )
+
+	ROM_REGION( 0x200000, "cart2", ROMREGION_ERASEFF )
+	ROM_REGION( 0x200000, "cart3", ROMREGION_ERASEFF )
+	ROM_REGION( 0x200000, "cart4", ROMREGION_ERASEFF )
+
+	ROM_REGION( 0x40000, "oki", ROMREGION_ERASE )
+	// RAM, filled by the 68000 and fed to the OKI
+
+	GALGAMES_MB_PALS
+ROM_END
+
+
+GAME( 1998, galgbios, 0,        galgbios, galgames, driver_device, 0, ROT0, "Creative Electronics & Software",         "Galaxy Games BIOS",              MACHINE_IS_BIOS_ROOT )
+GAME( 1998, galgame2, galgbios, galgame2, galgames, driver_device, 0, ROT0, "Creative Electronics & Software / Namco", "Galaxy Games StarPak 2",         0 )
+GAME( 1998, galgame3, galgbios, galgame3, galgames, driver_device, 0, ROT0, "Creative Electronics & Software / Atari", "Galaxy Games StarPak 3",         0 )
+GAME( 1998, galgame4, galgbios, galgame3, galgames, driver_device, 0, ROT0, "Creative Electronics & Software / Atari", "Galaxy Games StarPak 4 (proto)", MACHINE_IMPERFECT_GRAPHICS )
diff --git a/src/mame/mame.lst b/src/mame/mame.lst
index b0dc616a7f8..b2f620f5e46 100644
--- a/src/mame/mame.lst
+++ b/src/mame/mame.lst
@@ -13048,6 +13048,7 @@ galgame                         // (c) 1971 Computer Recreations, Inc
 @source:galgames.cpp
 galgame2                        // (c) 1998 Creative Electronics & Software (CES) / Namco
 galgame3                        // (c) 1998 Creative Electronics & Software (CES) / Atari
+galgame4                        // (c) 1998 Creative Electronics & Software (CES) / Atari
 galgbios                        // (c) 1998 Creative Electronics & Software (CES)
 
 @source:galivan.cpp