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Diffstat (limited to 'src/mame/drivers/exprraid.c')
-rw-r--r--src/mame/drivers/exprraid.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/src/mame/drivers/exprraid.c b/src/mame/drivers/exprraid.c
index 84eb4be1bad..2ed79a29a3d 100644
--- a/src/mame/drivers/exprraid.c
+++ b/src/mame/drivers/exprraid.c
@@ -540,7 +540,6 @@ static MACHINE_DRIVER_START( exprboot )
MDRV_CPU_REPLACE("maincpu", M6502, 4000000) /* 4 MHz ??? */
MDRV_CPU_PROGRAM_MAP(master_map)
- MDRV_CPU_IO_MAP(0)
MACHINE_DRIVER_END