diff --git a/src/mame/drivers/turbo.c b/src/mame/drivers/turbo.c
index f7e5ea597c8..7731b242382 100644
--- a/src/mame/drivers/turbo.c
+++ b/src/mame/drivers/turbo.c
@@ -1085,9 +1085,9 @@ ROM_END
 ROM_START( turbob )
 	ROM_REGION( 0x6000, "maincpu", 0 )
 	// B revision label on 1st rom, A revision for 2nd / 3rd, 2nd rom was faulty, 3rd rom matched existing set, existing 2nd rom passes rom check.
-	ROM_LOAD( "1363-t5b.ic76",  0x0000, 0x2000, CRC(f7f28149) SHA1(08aec3edd6d756b14b2f10fe5abd22ac83c79fcc) )
-	ROM_LOAD( "1364-t5a.ic89",  0x2000, 0x2000, CRC(6a341693) SHA1(428927c4a14bf82225875012c255d25dcffaf2ab) ) 
-	ROM_LOAD( "1365-t5a.ic103", 0x4000, 0x2000, CRC(3b6b0dc8) SHA1(3ebfa3f9fabd444ee105591acb6984b6b3523725) )
+	ROM_LOAD( "epr-1363_t5b.ic76",  0x0000, 0x2000, CRC(f7f28149) SHA1(08aec3edd6d756b14b2f10fe5abd22ac83c79fcc) ) /* CPU module stamped as 834-0128 */
+	ROM_LOAD( "epr-1364_t5a.ic89",  0x2000, 0x2000, CRC(6a341693) SHA1(428927c4a14bf82225875012c255d25dcffaf2ab) )
+	ROM_LOAD( "epr-1365_t5a.ic103", 0x4000, 0x2000, CRC(3b6b0dc8) SHA1(3ebfa3f9fabd444ee105591acb6984b6b3523725) )
 
 	ROM_REGION( 0x20000, "sprites", 0 ) /* sprite data */
 	ROM_LOAD( "epr-1246.prom-ic84", 0x00000, 0x2000, CRC(555bfe9a) SHA1(1e56385475eeff044dcd9b44a154991d3efe995e) ) /* level 0 */
@@ -1139,9 +1139,9 @@ ROM_END
 ROM_START( turboc )
 	ROM_REGION( 0x6000, "maincpu", 0 )
 	// based on other sets this seems to be the 'a' revision, previous MAME labels had it missing tho so needs confirming
-	ROM_LOAD( "1363-t5a.ic76",  0x0000, 0x2000, CRC(5c110fb6) SHA1(fdcdf488bd112db12aa22c4b7e9f34004185d4ce) )
-	ROM_LOAD( "1364-t5a.ic89",  0x2000, 0x2000, CRC(6a341693) SHA1(428927c4a14bf82225875012c255d25dcffaf2ab) )
-	ROM_LOAD( "1365-t5a.103",   0x4000, 0x2000, CRC(3b6b0dc8) SHA1(3ebfa3f9fabd444ee105591acb6984b6b3523725) )
+	ROM_LOAD( "epr-1363_t5a.ic76",  0x0000, 0x2000, CRC(5c110fb6) SHA1(fdcdf488bd112db12aa22c4b7e9f34004185d4ce) )
+	ROM_LOAD( "epr-1364_t5a.ic89",  0x2000, 0x2000, CRC(6a341693) SHA1(428927c4a14bf82225875012c255d25dcffaf2ab) )
+	ROM_LOAD( "epr-1365_t5a.ic103", 0x4000, 0x2000, CRC(3b6b0dc8) SHA1(3ebfa3f9fabd444ee105591acb6984b6b3523725) )
 
 	ROM_REGION( 0x20000, "sprites", 0 ) /* sprite data */
 	ROM_LOAD( "epr-1246.prom-ic84", 0x00000, 0x2000, CRC(555bfe9a) SHA1(1e56385475eeff044dcd9b44a154991d3efe995e) ) /* level 0 */
@@ -1193,8 +1193,8 @@ ROM_END
 
 ROM_START( turbod )
 	ROM_REGION( 0x6000, "maincpu", 0 )
-	// no letters on rom labels, original revision?
-	ROM_LOAD( "1363.ic76",  0x0000, 0x2000, CRC(b6329a00) SHA1(02ca3d7703607bc0390a14d838fafb01a3e3cdef) )
+	// no letters on rom labels, original revision? - service mode shows EPR-1262 through EPR-1264
+	ROM_LOAD( "1363.ic76",  0x0000, 0x2000, CRC(b6329a00) SHA1(02ca3d7703607bc0390a14d838fafb01a3e3cdef) ) /* CPU module stamped as 834-0128 */
 	ROM_LOAD( "1364.ic89",  0x2000, 0x2000, CRC(3192f83b) SHA1(78dabb75e38f5f8331bfc43dce852a4c4397f874) )
 	ROM_LOAD( "1365.ic103", 0x4000, 0x2000, CRC(23a3303a) SHA1(bcc4ab9203060b4043d779b7a242abc583093dbb) )