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Diffstat (limited to 'src/mame/drivers/lockon.cpp')
-rw-r--r--src/mame/drivers/lockon.cpp7
1 files changed, 4 insertions, 3 deletions
diff --git a/src/mame/drivers/lockon.cpp b/src/mame/drivers/lockon.cpp
index d9474d316a1..23830a5f669 100644
--- a/src/mame/drivers/lockon.cpp
+++ b/src/mame/drivers/lockon.cpp
@@ -414,9 +414,9 @@ WRITE_LINE_MEMBER(lockon_state::ym2203_irq)
WRITE8_MEMBER(lockon_state::ym2203_out_b)
{
- machine().bookkeeping().coin_counter_w(0, data & 0x80);
- machine().bookkeeping().coin_counter_w(1, data & 0x40);
- machine().bookkeeping().coin_counter_w(2, data & 0x20);
+ machine().bookkeeping().coin_counter_w(0, ~data & 0x80);
+ machine().bookkeeping().coin_counter_w(1, ~data & 0x40);
+ machine().bookkeeping().coin_counter_w(2, ~data & 0x20);
/* 'Lock-On' lamp */
m_lamp = BIT(~data, 4);
@@ -511,6 +511,7 @@ void lockon_state::lockon(machine_config &config)
ymsnd.irq_handler().set(FUNC(lockon_state::ym2203_irq));
ymsnd.port_a_read_callback().set_ioport("YM2203");
ymsnd.port_b_write_callback().set(FUNC(lockon_state::ym2203_out_b));
+ ymsnd.port_b_read_callback().set_constant(0xff);
ymsnd.add_route(0, "lspeaker", 0.40);
ymsnd.add_route(0, "rspeaker", 0.40);
ymsnd.add_route(1, "f2203.1l", 1.0);