diff --git a/src/mame/drivers/twinkle.c b/src/mame/drivers/twinkle.c
index 0f02209c6ca..ca16d133c2a 100644
--- a/src/mame/drivers/twinkle.c
+++ b/src/mame/drivers/twinkle.c
@@ -943,7 +943,7 @@ ROM_START( bmiidx4 )
 	ROM_LOAD( "a03j.pd",      0x000000, 0x000100, BAD_DUMP CRC(1faf8d1b) SHA1(e8d9d216a8f5459598ff68692f9197e226a231e6) )
 
 	DISK_REGION( "cdrom0" )
-	DISK_IMAGE_READONLY( "a03jaa01", 0, BAD_DUMP MD5(dccbe0158236453c27a9768d185ee275) SHA1(ee0f5989ed2bec3d174150a072e188bc10c15dcb) )
+	DISK_IMAGE_READONLY( "a03jaa01", 0, BAD_DUMP SHA1(2a587b5524bac6f03d26b55247a0acd22aad6c3a) )
 //  DISK_IMAGE_READONLY( "a03jaahd", 1, NO_DUMP )
 //  DISK_IMAGE_READONLY( "a03jaa02", 2, NO_DUMP )
 ROM_END
@@ -955,7 +955,7 @@ ROM_START( bmiidx6 )
 	ROM_LOAD( "b4uj.pd",      0x000000, 0x000100, BAD_DUMP CRC(0ab15633) SHA1(df004ff41f35b16089f69808ccf53a5e5cc13ac3) )
 
 	DISK_REGION( "cdrom0" )
-	DISK_IMAGE_READONLY( "b4ujaa01", 0, BAD_DUMP MD5(c9397ff1399b268ceac98732e4d7b16d) SHA1(1e723c74fd93140881c00c5af402249e0a8b3f2f) )
+	DISK_IMAGE_READONLY( "b4ujaa01", 0, BAD_DUMP SHA1(d8f5d56b8728bea761dc4cdbc04851094d276bd6) )
 //  DISK_IMAGE_READONLY( "b4ujaahd", 1, NO_DUMP )
 //  DISK_IMAGE_READONLY( "b4ujaa02", 2, NO_DUMP )
 ROM_END
@@ -967,7 +967,7 @@ ROM_START( bmiidx7 )
 	ROM_LOAD( "b44j.pd",      0x000000, 0x000100, BAD_DUMP CRC(5baf4761) SHA1(aa7e07eb2cada03b85bdf11ac6a3de65f4253eef) )
 
 	DISK_REGION( "cdrom0" )
-	DISK_IMAGE_READONLY( "b44jaa01", 0, BAD_DUMP MD5(3078c73d050bb6a513b329f3844e1208) SHA1(5910e557816ced2c5162c5458b5ccf6f8e6839f0) )
+	DISK_IMAGE_READONLY( "b44jaa01", 0, BAD_DUMP SHA1(a21610f3dc090e39e125d063442ed877fa056146) )
 //  DISK_IMAGE_READONLY( "b44jaahd", 1, NO_DUMP )
 //  DISK_IMAGE_READONLY( "b44jaa02", 2, NO_DUMP )
 ROM_END
@@ -979,7 +979,7 @@ ROM_START( bmiidx8 )
 	ROM_LOAD( "c44j.pd",      0x000000, 0x000100, BAD_DUMP CRC(04c22349) SHA1(d1cb78911cb1ca660d393a81ed3ed07b24c51525) )
 
 	DISK_REGION( "cdrom0" )
-	DISK_IMAGE_READONLY( "c44jaa01", 0, BAD_DUMP MD5(43ae8f40ba8974d7d135e83c8e09112a) SHA1(b116775e47c7d5e2578b92811dccdc84f1cafe43) )
+	DISK_IMAGE_READONLY( "c44jaa01", 0, BAD_DUMP SHA1(8b544c81bc56b19e4aa1649e68824811d6d51ce5) )
 //  DISK_IMAGE_READONLY( "c44jaahd", 1, NO_DUMP )
 //  DISK_IMAGE_READONLY( "c44jaa02", 2, NO_DUMP )
 ROM_END
@@ -991,7 +991,7 @@ ROM_START( bmiidxc )
 	ROM_LOAD( "896j.pd",      0x000000, 0x000100, BAD_DUMP CRC(1e5caf37) SHA1(75b378662b651cb322e41564d3bae68cc9edadc5) )
 
 	DISK_REGION( "cdrom0" )
-	DISK_IMAGE_READONLY( "896jaabm", 0, MD5(f842277762e330d500fa3eb6755c1547) SHA1(965772160177df43ce7a94f0e12d8cf676e57228) )
+	DISK_IMAGE_READONLY( "896jaabm", 0, SHA1(af008e5bcf18da4e9aea752a712c843e37a74be5) )
 //  DISK_IMAGE_READONLY( "abmjaahd", 1, NO_DUMP )
 //  DISK_IMAGE_READONLY( "abmjaa02", 2, NO_DUMP )
 ROM_END
@@ -1003,7 +1003,7 @@ ROM_START( bmiidxc2 )
 	ROM_LOAD( "984j.pd",      0x000000, 0x000100, BAD_DUMP CRC(213843e5) SHA1(5571db155a60fa4087dd996af48e8e27fc1c518c) )
 
 	DISK_REGION( "cdrom0" )
-	DISK_IMAGE_READONLY( "984a01bm", 0, MD5(61ada5db9fcbfa01971c5f06253ab5e1) SHA1(98d5e120d0cd08e8598bfde75b16ba62bf67a15b) )
+	DISK_IMAGE_READONLY( "984a01bm", 0, SHA1(d9b7d74a72a76e4e9cf7725e0fb8dafcc1c87187) )
 //  DISK_IMAGE_READONLY( "abmjaahd", 1, NO_DUMP )
 //  DISK_IMAGE_READONLY( "abmjaa02", 2, NO_DUMP )
 ROM_END
@@ -1015,7 +1015,7 @@ ROM_START( bmiidxca )
 	ROM_LOAD( "896j.pd",      0x000000, 0x000100, BAD_DUMP CRC(1e5caf37) SHA1(75b378662b651cb322e41564d3bae68cc9edadc5) )
 
 	DISK_REGION( "cdrom0" )
-	DISK_IMAGE_READONLY( "896jabbm", 0, MD5(46f8bd83e8fbe527f6e4512804b2ce1e) SHA1(b7fcf3e6b9c1cebedacbc65c77aa3509c66984a9) )
+	DISK_IMAGE_READONLY( "896jabbm", 0, SHA1(117ae4c876207bbaf9e8fe0fdf5bb161155c1bdb) )
 //  DISK_IMAGE_READONLY( "abmjaahd", 1, NO_DUMP )
 //  DISK_IMAGE_READONLY( "abmjaa02", 2, NO_DUMP )
 ROM_END