diff --git a/src/mame/drivers/naomi.cpp b/src/mame/drivers/naomi.cpp
index a96abadce77..2e14c2a5269 100644
--- a/src/mame/drivers/naomi.cpp
+++ b/src/mame/drivers/naomi.cpp
@@ -9253,11 +9253,11 @@ ROM_START( maxspeed )
 
 	ROM_REGION( 0x9000000, "rom_board", ROMREGION_ERASE)
 	ROM_LOAD( "ax0501p01.ic18", 0x0000000, 0x0800000, CRC(e1651867) SHA1(49caf82f4b111da312b14bb0a9c31e3732b4b24e) )
-	ROM_LOAD( "ax0501m01.ic11", 0x0800000, 0x1000000, CRC(4a847a59) SHA1(7808bcd357b85861082b426dbe34a20ae7016f6a) )
-	ROM_LOAD( "ax0502m01.ic12", 0x1000000, 0x1000000, CRC(2580237f) SHA1(2e92c940f95edae33d6a7e8a071544a9083a0fd6) )
-	ROM_LOAD( "ax0503m01.ic13", 0x2000000, 0x1000000, CRC(e5a3766b) SHA1(1fe6e072adad27ac43c0bff04e3c448678aabc18) )
-	ROM_LOAD( "ax0504m01.ic14", 0x3000000, 0x1000000, CRC(7955b55a) SHA1(927f58d6961e702c2a8afce79bac5e5cff3dfed6) )
-	ROM_LOAD( "ax0505m01.ic15", 0x4000000, 0x1000000, CRC(e8ccc660) SHA1(a5f414f200a0d41e958430d0fc2d4e1fda1cc67c) )
+	ROM_LOAD( "ax0501m01.ic11", 0x1000000, 0x1000000, CRC(4a847a59) SHA1(7808bcd357b85861082b426dbe34a20ae7016f6a) )
+	ROM_LOAD( "ax0502m01.ic12", 0x2000000, 0x1000000, CRC(2580237f) SHA1(2e92c940f95edae33d6a7e8a071544a9083a0fd6) )
+	ROM_LOAD( "ax0503m01.ic13", 0x3000000, 0x1000000, CRC(e5a3766b) SHA1(1fe6e072adad27ac43c0bff04e3c448678aabc18) )
+	ROM_LOAD( "ax0504m01.ic14", 0x4000000, 0x1000000, CRC(7955b55a) SHA1(927f58d6961e702c2a8afce79bac5e5cff3dfed6) )
+	ROM_LOAD( "ax0505m01.ic15", 0x5000000, 0x1000000, CRC(e8ccc660) SHA1(a5f414f200a0d41e958430d0fc2d4e1fda1cc67c) )
 
 	ROM_REGION( 4, "rom_key", 0 )
 	ROM_LOAD( "ax0501f01.bin", 0, 4, CRC(c35d9a95) SHA1(bf260caf33821be51014b06480a11ec982fa4fcd) )
diff --git a/src/mame/machine/awboard.cpp b/src/mame/machine/awboard.cpp
index 03cd59a9118..b2374e52858 100644
--- a/src/mame/machine/awboard.cpp
+++ b/src/mame/machine/awboard.cpp
@@ -89,8 +89,8 @@ ROM board internal layouts:
  Type 1:
 
  00000000 - 00800000 IC18 flash ROM
- 00800000 - 01000000 mirror of above
- 01000000 - 02000000 IC10 \
+ 00800000 - 01000000 IC10 or mirror of above
+ 01000000 - 02000000 IC11 \
         .....               mask ROMs
  07000000 - 08000000 IC17 /