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-rw-r--r--src/mame/drivers/sacstate.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mame/drivers/sacstate.cpp b/src/mame/drivers/sacstate.cpp
index 6e0a995e9fa..d1be027cd50 100644
--- a/src/mame/drivers/sacstate.cpp
+++ b/src/mame/drivers/sacstate.cpp
@@ -107,6 +107,7 @@ void sacstate_state::sacstate_mem(address_map &map)
void sacstate_state::sacstate_io(address_map &map)
{
map.unmap_value_high();
+ map.global_mask(0x1f);
map(0x00, 0x00).r(FUNC(sacstate_state::port00_r));
map(0x01, 0x01).r(FUNC(sacstate_state::port01_r));
map(0x04, 0x04).r(FUNC(sacstate_state::port04_r));