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-rw-r--r--src/mame/drivers/psikyo.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mame/drivers/psikyo.cpp b/src/mame/drivers/psikyo.cpp
index 7de0ddb99b6..1f3fe77f484 100644
--- a/src/mame/drivers/psikyo.cpp
+++ b/src/mame/drivers/psikyo.cpp
@@ -1011,6 +1011,9 @@ GFXDECODE_END
void psikyo_state::machine_start()
{
+ // assumes it can make an address mask with m_spritelut.length() - 1
+ assert(!(m_spritelut.length() & (m_spritelut.length() - 1)));
+
save_item(NAME(m_mcu_status));
save_item(NAME(m_tilemap_bank));
}