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-rw-r--r--src/mame/audio/dsbz80.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mame/audio/dsbz80.cpp b/src/mame/audio/dsbz80.cpp
index 34d3cc33938..245d5d52032 100644
--- a/src/mame/audio/dsbz80.cpp
+++ b/src/mame/audio/dsbz80.cpp
@@ -54,6 +54,7 @@ MACHINE_CONFIG_MEMBER( dsbz80_device::device_add_mconfig )
MCFG_CLOCK_ADD("uart_clock", 500000) // 16 times 31.25MHz (standard Sega/MIDI sound data rate)
MCFG_CLOCK_SIGNAL_HANDLER(DEVWRITELINE("uart", i8251_device, write_rxc))
+ MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("uart", i8251_device, write_txc))
MACHINE_CONFIG_END
//**************************************************************************