diff --git a/src/mame/drivers/segas32.cpp b/src/mame/drivers/segas32.cpp
index 77144653f9e..3645e4f45dc 100644
--- a/src/mame/drivers/segas32.cpp
+++ b/src/mame/drivers/segas32.cpp
@@ -4603,8 +4603,8 @@ ROM_START( radr )
 
 	ROM_REGION( 0x400000, "mainpcb:soundcpu", 0 ) /* sound CPU */
 	ROM_LOAD_x8( "epr-14108.ic9",  0x000000, 0x020000, CRC(38a99b4d) SHA1(b6455e6b29bfef41c5e0ebe3a8064889b7e5f5fd) )
-	ROM_LOAD_x2( "epr-14109.ic14", 0x100000, 0x080000, CRC(d5563697) SHA1(eb3fd3dbfea383ac1bb5d2e1552723994cb4693d) )
-	ROM_LOAD_x2( "epr-14110.ic20", 0x200000, 0x080000, CRC(33fd2913) SHA1(60b664559b4989446b1c7d875432e53a36fe27df) )
+	ROM_LOAD_x2( "epr-14109.ic14", 0x100000, 0x080000, CRC(d5563697) SHA1(eb3fd3dbfea383ac1bb5d2e1552723994cb4693d) ) // same as radm, but different epr code
+	ROM_LOAD_x2( "epr-14110.ic20", 0x200000, 0x080000, CRC(33fd2913) SHA1(60b664559b4989446b1c7d875432e53a36fe27df) ) // same as radm, but different epr code
 	ROM_LOAD_x2( "epr-14237.ic22", 0x300000, 0x080000, CRC(0a4b4b29) SHA1(98447a587f903ba03e17d6a145b7c8bfddf25c4d) ) // 1xxxxxxxxxxxxxxxxxx = 0xFF
 
 	ROM_REGION( 0x100000, "mainpcb:gfx1", 0 ) /* tiles */
@@ -4648,8 +4648,8 @@ ROM_START( radru )
 
 	ROM_REGION( 0x400000, "mainpcb:soundcpu", 0 ) /* sound CPU */
 	ROM_LOAD_x8( "epr-14108.ic9",  0x000000, 0x020000, CRC(38a99b4d) SHA1(b6455e6b29bfef41c5e0ebe3a8064889b7e5f5fd) )
-	ROM_LOAD_x2( "epr-14109.ic14", 0x100000, 0x080000, CRC(b42e5833) SHA1(da94ce7c1d7a581a1aa6b79b323c67a919918808) )
-	ROM_LOAD_x2( "epr-14110.ic20", 0x200000, 0x080000, CRC(b495e7dc) SHA1(b4143fcee10e0649378fdb1e3f5a0a2c585414ec) )
+	ROM_LOAD_x2( "epr-14109.ic14", 0x100000, 0x080000, CRC(d5563697) SHA1(eb3fd3dbfea383ac1bb5d2e1552723994cb4693d) ) // same as radm, but different epr code
+	ROM_LOAD_x2( "epr-14110.ic20", 0x200000, 0x080000, CRC(33fd2913) SHA1(60b664559b4989446b1c7d875432e53a36fe27df) ) // same as radm, but different epr code
 	ROM_LOAD_x2( "epr-14237.ic22", 0x300000, 0x080000, CRC(0a4b4b29) SHA1(98447a587f903ba03e17d6a145b7c8bfddf25c4d) )
 
 	ROM_REGION( 0x100000, "mainpcb:gfx1", 0 ) /* tiles */
@@ -4693,8 +4693,8 @@ ROM_START( radrj )
 
 	ROM_REGION( 0x400000, "mainpcb:soundcpu", 0 ) /* sound CPU */
 	ROM_LOAD_x8( "epr-14108.ic9",  0x000000, 0x020000, CRC(38a99b4d) SHA1(b6455e6b29bfef41c5e0ebe3a8064889b7e5f5fd) )
-	ROM_LOAD_x2( "epr-14109.ic14", 0x100000, 0x080000, CRC(b42e5833) SHA1(da94ce7c1d7a581a1aa6b79b323c67a919918808) )
-	ROM_LOAD_x2( "epr-14110.ic20", 0x200000, 0x080000, CRC(b495e7dc) SHA1(b4143fcee10e0649378fdb1e3f5a0a2c585414ec) )
+	ROM_LOAD_x2( "epr-14109.ic14", 0x100000, 0x080000, CRC(d5563697) SHA1(eb3fd3dbfea383ac1bb5d2e1552723994cb4693d) ) // same as radm, but different epr code
+	ROM_LOAD_x2( "epr-14110.ic20", 0x200000, 0x080000, CRC(33fd2913) SHA1(60b664559b4989446b1c7d875432e53a36fe27df) ) // same as radm, but different epr code
 	ROM_LOAD_x2( "epr-14237.ic22", 0x300000, 0x080000, CRC(0a4b4b29) SHA1(98447a587f903ba03e17d6a145b7c8bfddf25c4d) )
 
 	ROM_REGION( 0x100000, "mainpcb:gfx1", 0 ) /* tiles */