diff --git a/src/mame/drivers/nss.c b/src/mame/drivers/nss.c
index 928aa6e0874..9675cb57c4b 100644
--- a/src/mame/drivers/nss.c
+++ b/src/mame/drivers/nss.c
@@ -859,11 +859,11 @@ MACHINE_CONFIG_END
 	ROM_LOAD("spc700.rom", 0, 0x40, CRC(44bb3a40) SHA1(97e352553e94242ae823547cd853eecda55c20f0) ) \
 	ROM_REGION(0x8000,         "bios",  0)      /* Bios CPU */ \
 	ROM_SYSTEM_BIOS( 0, "single", "Nintendo Super System (Single Cart BIOS)" ) \
-	ROMX_LOAD("nss-ic14.02", 0x00000, 0x8000, CRC(e06cb58f) SHA1(62f507e91a2797919a78d627af53f029c7d81477), ROM_BIOS(1) )   /* bios */ \
+	ROMX_LOAD("nss-ic14.02.ic14", 0x00000, 0x8000, CRC(e06cb58f) SHA1(62f507e91a2797919a78d627af53f029c7d81477), ROM_BIOS(1) )   /* bios */ \
 	ROM_SYSTEM_BIOS( 1, "multi", "Nintendo Super System (Multi Cart BIOS)" ) \
-	ROMX_LOAD("nss-c.dat"  , 0x00000, 0x8000, CRC(a8e202b3) SHA1(b7afcfe4f5cf15df53452dc04be81929ced1efb2), ROM_BIOS(2) )   /* bios */ \
-	ROM_SYSTEM_BIOS( 2, "single3", "Nintendo Super System (Single Cart BIOS v3)" ) \
-	ROMX_LOAD("nss-v3.rom" , 0x00000, 0x8000, CRC(ac385b53) SHA1(e3942f9d508c3c8074c3c3941376c37ca68b8e54), ROM_BIOS(3) )   /* bios */
+	ROMX_LOAD("nss-c.ic14"  , 0x00000, 0x8000, CRC(a8e202b3) SHA1(b7afcfe4f5cf15df53452dc04be81929ced1efb2), ROM_BIOS(2) )   /* bios */ \
+	ROM_SYSTEM_BIOS( 2, "single3", "Nintendo Super System (Single Cart BIOS v3, hack?)" ) \
+	ROMX_LOAD("nss-v3.ic14" , 0x00000, 0x8000, CRC(ac385b53) SHA1(e3942f9d508c3c8074c3c3941376c37ca68b8e54), ROM_BIOS(3) )   /* bios */
 
 
 ROM_START( nss )
@@ -1008,7 +1008,7 @@ ROM_START( nss_smw )
 
 	/* instruction / data rom for bios */
 	ROM_REGION( 0x8000, "ibios_rom", 0 )
-	ROM_LOAD( "mw.ic3", 0x0000, 0x8000, CRC(f2c5466e) SHA1(e116f01342fcf359498ed8750741c139093b1fb2) )
+	ROM_LOAD( "nss-r__ic3__mw.ic3", 0x0000, 0x8000, CRC(f2c5466e) SHA1(e116f01342fcf359498ed8750741c139093b1fb2) )
 
 	ROM_REGION( 0x10, "rp5h01", ROMREGION_ERASE00 )
 	ROM_LOAD( "security.prm", 0x000000, 0x000010, CRC(fd700dca) SHA1(6805cefb1856c3498b7a7a049c0d09858afac47c) )