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-rw-r--r--src/devices/sound/tms5220.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/devices/sound/tms5220.cpp b/src/devices/sound/tms5220.cpp
index d0afb710f46..05c5c3464df 100644
--- a/src/devices/sound/tms5220.cpp
+++ b/src/devices/sound/tms5220.cpp
@@ -1770,6 +1770,7 @@ void tms5220_device::device_timer(emu_timer &timer, device_timer_id id, int para
case 0x03:
/* High Impedance */
m_io_ready = param;
+ break;
case 0x00:
/* illegal */
m_io_ready = param;