diff --git a/src/mame/drivers/zn.cpp b/src/mame/drivers/zn.cpp
index 8ac1db8e4f7..81fba2ada5e 100644
--- a/src/mame/drivers/zn.cpp
+++ b/src/mame/drivers/zn.cpp
@@ -5364,8 +5364,8 @@ ROM_START( nbajamexa )
 	AC_BIOS
 
 	ROM_REGION32_LE( 0x2000000, "bankedroms", 0 )
-	ROM_LOAD16_BYTE( "360-mp-a1_odd.u36",  0x0000001, 0x100000, CRC(c433e827) SHA1(1d2a5a6990a1b1864e63ce3ba7306d48ebbd4775) )
-	ROM_LOAD16_BYTE( "360-mp-a1_even.u35", 0x0000000, 0x100000, CRC(d8f5b2f7) SHA1(e38609d314721b8b612e047406e2888395917b0d) )
+	ROM_LOAD16_BYTE( "360-mp-a1_odd_cs_e0fe.u36",  0x0000001, 0x100000, CRC(c433e827) SHA1(1d2a5a6990a1b1864e63ce3ba7306d48ebbd4775) ) /* labeled  360-MP-A1  ODD  CS = E0FE */
+	ROM_LOAD16_BYTE( "360-mp-a1_even_cs_295a.u35", 0x0000000, 0x100000, CRC(d8f5b2f7) SHA1(e38609d314721b8b612e047406e2888395917b0d) ) /* labeled  360-MP-A1  EVEN  CS = 295A */
 	ROM_LOAD16_BYTE( "nba0o.u28",   0x0200001, 0x200000, CRC(be13c5af) SHA1(eee5c9d985384ecfe4f00fae27d66fbefc15b28e) )
 	ROM_LOAD16_BYTE( "nba0e.u41",   0x0200000, 0x200000, CRC(077f4355) SHA1(63c52bb82943b52bb0906d114acd5ea8643068b6) )
 	ROM_LOAD16_BYTE( "nba1o.u29",   0x0600001, 0x200000, CRC(3650e85b) SHA1(a36bfa235c8e3bb516e178f54d3c5e3955c7e918) )