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-rw-r--r--src/devices/machine/mc146818.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/devices/machine/mc146818.cpp b/src/devices/machine/mc146818.cpp
index c55935b3184..4cdb4f37b5e 100644
--- a/src/devices/machine/mc146818.cpp
+++ b/src/devices/machine/mc146818.cpp
@@ -489,7 +489,7 @@ void mc146818_device::update_irq()
}
else
{
- m_data[REG_C] &= REG_C_IRQF;
+ m_data[REG_C] &= ~REG_C_IRQF;
m_write_irq(ASSERT_LINE);
}
}