diff --git a/src/mame/drivers/cybertnk.c b/src/mame/drivers/cybertnk.c
index b0492bcb04b..a243e689669 100644
--- a/src/mame/drivers/cybertnk.c
+++ b/src/mame/drivers/cybertnk.c
@@ -6,6 +6,11 @@ preliminary driver by Angelo Salese
 
 Maybe it has some correlation with WEC Le Mans HW? (supposely that was originally done by Coreland too)
 
+TODO:
+- ROM "SS5" is missing? Or it's a sound chip that's labelled SS5?
+- dual screen output.
+
+(note: the following notes are from "PS")
 - Communications
 Master slave comms looks like shared RAM.
 The slave tests these RAM banks all using the same routine at 0x000006E6
@@ -67,10 +72,6 @@ or maybe caused by the initial base offset which is the same as the loop increme
 Sub at CPU2:01B7, the block process starts at base 8020h and increments by 20h each time.
 It overruns the top of RAM on the last iteration.
 
-TODO:
--Rom "SS5" is missing?Or it's a sound chip that's labelled SS5?
--Paletteram is likely to be buffered,the two banks are really similar.
-
 ============================================================================================
 Cyber Tank
 Coreland Technology, Inc 1987
@@ -707,19 +708,15 @@ ROM_START( cybertnk )
 	ROM_REGION( 0x8000, "audiocpu", 0 )
 	ROM_LOAD( "ss1",    0x0000, 0x8000, CRC(c3ba160b) SHA1(cfbfcad443ff83cd4e707f045a650417aca03d85) )
 
-	ROM_REGION( 0x80000, "ym1", 0 )
+	ROM_REGION( 0x80000, "ym1", ROMREGION_ERASEFF )
 	ROM_LOAD( "ss2",    0x00000, 0x20000, CRC(da4b8733) SHA1(177372a53fd49629d1cda83bdd324ee90fbcdbb5) )
 	/*The following two are identical*/
 	ROM_LOAD( "ss3",    0x20000, 0x20000, CRC(cecdea53) SHA1(7e6a6499cab4720f4b6d6d8988bb9dd5766511ab) )
 	ROM_LOAD( "ss4",    0x40000, 0x20000, CRC(cecdea53) SHA1(7e6a6499cab4720f4b6d6d8988bb9dd5766511ab) )
 	//ss5?
 
-	ROM_REGION( 0x80000, "ym2", 0 )
-	ROM_LOAD( "ss2",    0x00000, 0x20000, CRC(da4b8733) SHA1(177372a53fd49629d1cda83bdd324ee90fbcdbb5) )
-	/*The following two are identical*/
-	ROM_LOAD( "ss3",    0x20000, 0x20000, CRC(cecdea53) SHA1(7e6a6499cab4720f4b6d6d8988bb9dd5766511ab) )
-	ROM_LOAD( "ss4",    0x40000, 0x20000, CRC(cecdea53) SHA1(7e6a6499cab4720f4b6d6d8988bb9dd5766511ab) )
-	//ss5?
+	ROM_REGION( 0x80000, "ym2", ROMREGION_ERASEFF )
+	ROM_COPY( "ym1", 0x00000, 0x00000, 0x60000 )
 
 	ROM_REGION( 0x40000, "gfx1", 0 )
 	ROM_LOAD( "s09", 0x00000, 0x10000, CRC(69e6470c) SHA1(8e7db6988366cae714fff72449623a7977af1db1) )
@@ -758,7 +755,7 @@ ROM_START( cybertnk )
 	ROM_LOAD32_BYTE( "c15" , 0x180002, 0x20000, CRC(ad681c70) SHA1(84c6589464103091b39f1ccdbfed10bf538452f3) )
 	ROM_LOAD32_BYTE( "c16" , 0x180003, 0x20000, CRC(1f44dbb6) SHA1(ea1368d6367a2de6d5e6764f8ab705b182d6d276) )
 
-	ROM_REGION( 0x200000, "user2", 0 )
+	ROM_REGION( 0x200000, "road_data", 0 )
 	ROM_LOAD16_BYTE( "road_chl" , 0x000000, 0x20000, CRC(862b109c) SHA1(9f81918362218ddc0a6bf0a5317c5150e514b699) )
 	ROM_LOAD16_BYTE( "road_chh" , 0x000001, 0x20000, CRC(9dedc988) SHA1(10bae1be0e35320872d4994f7e882cd1de988c90) )