diff --git a/src/mess/drivers/saturn.c b/src/mess/drivers/saturn.c
index 5fc497ba172..e6cbc0e8074 100644
--- a/src/mess/drivers/saturn.c
+++ b/src/mess/drivers/saturn.c
@@ -921,7 +921,10 @@ ROM_END
 
 ROM_START(hisaturn)
 	ROM_REGION( 0x480000, "maincpu", ROMREGION_ERASEFF ) /* SH2 code */
-	ROM_LOAD("hisaturn.bin", 0x00000000, 0x00080000, CRC(721e1b60) SHA1(49d8493008fa715ca0c94d99817a5439d6f2c796))
+	ROM_SYSTEM_BIOS(0, "102", "v1.02 (950519)")
+	ROMX_LOAD( "mpr-18100.bin", 0x000000, 0x080000, CRC(3408dbf4) SHA1(8a22710e09ce75f39625894366cafe503ed1942d), ROM_BIOS(1)) 
+	ROM_SYSTEM_BIOS(1, "101", "v1.01 (950130)")
+	ROMX_LOAD("hisaturn.bin", 0x00000000, 0x00080000, CRC(721e1b60) SHA1(49d8493008fa715ca0c94d99817a5439d6f2c796), ROM_BIOS(2))
 	ROM_REGION( 0x080000, "slave", 0 ) /* SH2 code */
 	ROM_COPY( "maincpu",0,0,0x080000)
 ROM_END