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Diffstat (limited to 'src/mame/drivers/kingdrby.cpp')
-rw-r--r--src/mame/drivers/kingdrby.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mame/drivers/kingdrby.cpp b/src/mame/drivers/kingdrby.cpp
index 053027b9e25..e6039a808e6 100644
--- a/src/mame/drivers/kingdrby.cpp
+++ b/src/mame/drivers/kingdrby.cpp
@@ -995,6 +995,7 @@ void kingdrby_state::kingdrby(machine_config &config)
// 6000-6003 PPI group modes 0/0 - B & C (lower) as input, A & C (upper) as output.
I8255A(config, m_ppi[1]);
m_ppi[1]->out_pa_callback().set(FUNC(kingdrby_state::sound_cmd_w));
+ m_ppi[1]->tri_pa_callback().set_constant(0x7f);
m_ppi[1]->in_pb_callback().set(FUNC(kingdrby_state::key_matrix_r));
m_ppi[1]->in_pc_callback().set(FUNC(kingdrby_state::input_mux_r));
m_ppi[1]->out_pc_callback().set(FUNC(kingdrby_state::outport2_w));
@@ -1031,6 +1032,7 @@ void kingdrby_state::kingdrbb(machine_config &config)
/* C as input, (all) as output */
m_ppi[0]->out_pa_callback().set(FUNC(kingdrby_state::sound_cmd_w));
m_ppi[0]->in_pa_callback().set_constant(0);
+ m_ppi[0]->tri_pa_callback().set_constant(0x7f);
m_ppi[0]->in_pb_callback().set_ioport("IN0");
m_ppi[0]->out_pb_callback().set(FUNC(kingdrby_state::outportb_w));
m_ppi[0]->in_pc_callback().set_ioport("IN1");