diff --git a/src/mame/drivers/meritm.c b/src/mame/drivers/meritm.c
index 6f95af6ff56..1d31cf8e6da 100644
--- a/src/mame/drivers/meritm.c
+++ b/src/mame/drivers/meritm.c
@@ -1357,13 +1357,13 @@ SC3943.u20    = ATF16V8B25PC
 
 ROM_START( megat2 ) /* Dallas DS1204U-3 security key labeled 9255-10-01-U5-R0 */
 	ROM_REGION( 0x400000, "maincpu", 0 )
-	ROM_LOAD( "qs9235-01_u5oru32-r0b", 0x000000, 0x080000, CRC(f7ecd49b) SHA1(34c1293da7304e8a46a96f1dbd7add3291afe3fc) )
+	ROM_LOAD( "qs9235-01_u5oru32-r0b", 0x000000, 0x080000, CRC(f7ecd49b) SHA1(34c1293da7304e8a46a96f1dbd7add3291afe3fc) ) /* Location U32 */
 	ROM_RELOAD(                        0x080000, 0x080000)
-	ROM_LOAD( "qs9235-01_u6oru36-r0",  0x100000, 0x080000, CRC(0a358743) SHA1(cc7c1b75e391204a7bdae2e1cecd9b55b572f8d5) )
+	ROM_LOAD( "qs9235-01_u6oru36-r0",  0x100000, 0x080000, CRC(0a358743) SHA1(cc7c1b75e391204a7bdae2e1cecd9b55b572f8d5) ) /* Location U36 */
 	ROM_RELOAD(                        0x180000, 0x080000)
-	ROM_LOAD( "qs9235-01_u7oru37-r0",  0x200000, 0x080000, CRC(16643f83) SHA1(347af99f535a8b473c8780067d5132add7fa0d8c) )
+	ROM_LOAD( "qs9235-01_u7oru37-r0",  0x200000, 0x080000, CRC(16643f83) SHA1(347af99f535a8b473c8780067d5132add7fa0d8c) ) /* Location U37 */
 	ROM_RELOAD(                        0x280000, 0x080000)
-	ROM_LOAD( "9255-01-06_u38-r0g",    0x300000, 0x080000, CRC(51b8160a) SHA1(f2dd44ff3bd62c86c385b5e1438c560947f6c253) )
+	ROM_LOAD( "9255-10-06_u38-r0g",    0x300000, 0x080000, CRC(51b8160a) SHA1(f2dd44ff3bd62c86c385b5e1438c560947f6c253) ) /* Location U38, 02/10/1995 10:03:52 - California version */
 	ROM_RELOAD(                        0x380000, 0x080000)
 ROM_END