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Diffstat (limited to 'src/devices/cpu/pps41/mm78op.cpp')
-rw-r--r--src/devices/cpu/pps41/mm78op.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/devices/cpu/pps41/mm78op.cpp b/src/devices/cpu/pps41/mm78op.cpp
index 05c2dac9d36..13db81d05b8 100644
--- a/src/devices/cpu/pps41/mm78op.cpp
+++ b/src/devices/cpu/pps41/mm78op.cpp
@@ -164,7 +164,7 @@ void mm78_device::op_tab()
void mm78_device::op_ix()
{
// IX: input to X from channel X(aka B)
- m_x = (m_read_r() & m_r_output) >> 4;
+ m_x = (m_read_r() & m_r_output) >> 4 & 0xf;
}
void mm78_device::op_ox()