diff --git a/src/mame/drivers/namcos10.c b/src/mame/drivers/namcos10.c
index a949b78231d..c1924b7648c 100644
--- a/src/mame/drivers/namcos10.c
+++ b/src/mame/drivers/namcos10.c
@@ -275,7 +275,7 @@ public:
 };
 
 static ADDRESS_MAP_START( namcos10_map, ADDRESS_SPACE_PROGRAM, 32 )
-	AM_RANGE(0x00000000, 0x003fffff) AM_RAM AM_SHARE("share1") /* ram */
+	AM_RANGE(0x00000000, 0x00ffffff) AM_RAM AM_SHARE("share1") /* ram */
 	AM_RANGE(0x1f800000, 0x1f8003ff) AM_RAM /* scratchpad */
 	AM_RANGE(0x1f801000, 0x1f801007) AM_WRITENOP
 	AM_RANGE(0x1f801008, 0x1f80100b) AM_RAM /* ?? */
@@ -293,9 +293,9 @@ static ADDRESS_MAP_START( namcos10_map, ADDRESS_SPACE_PROGRAM, 32 )
 	AM_RANGE(0x1f802020, 0x1f802033) AM_RAM /* ?? */
 	AM_RANGE(0x1f802040, 0x1f802043) AM_WRITENOP
 	AM_RANGE(0x1fc00000, 0x1fffffff) AM_ROM AM_SHARE("share2") AM_REGION("user1", 0) /* bios */
-	AM_RANGE(0x80000000, 0x803fffff) AM_RAM AM_SHARE("share1") /* ram mirror */
+	AM_RANGE(0x80000000, 0x80ffffff) AM_RAM AM_SHARE("share1") /* ram mirror */
 	AM_RANGE(0x9fc00000, 0x9fffffff) AM_ROM AM_SHARE("share2") /* bios mirror */
-	AM_RANGE(0xa0000000, 0xa03fffff) AM_RAM AM_SHARE("share1") /* ram mirror */
+	AM_RANGE(0xa0000000, 0xa0ffffff) AM_RAM AM_SHARE("share1") /* ram mirror */
 	AM_RANGE(0xbfc00000, 0xbfffffff) AM_ROM AM_SHARE("share2") /* bios mirror */
 	AM_RANGE(0xfffe0130, 0xfffe0133) AM_WRITENOP
 ADDRESS_MAP_END
@@ -384,7 +384,7 @@ static MACHINE_RESET( namcos10 )
 
 static MACHINE_CONFIG_START( namcos10, namcos10_state )
 	/* basic machine hardware */
-	MCFG_CPU_ADD( "maincpu", PSXCPU, XTAL_101_4912MHz )
+	MCFG_CPU_ADD( "maincpu", CXD8661R, XTAL_101_4912MHz )
 	MCFG_CPU_PROGRAM_MAP( namcos10_map)
 	MCFG_CPU_VBLANK_INT("screen", psx_vblank)