diff options
Diffstat (limited to 'src/devices/machine/am9513.cpp')
-rw-r--r-- | src/devices/machine/am9513.cpp | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/src/devices/machine/am9513.cpp b/src/devices/machine/am9513.cpp index 2ce1241e086..60f76e691c8 100644 --- a/src/devices/machine/am9513.cpp +++ b/src/devices/machine/am9513.cpp @@ -100,13 +100,17 @@ void am9513_device::device_start() std::fill(std::begin(m_counter_armed), std::end(m_counter_armed), false); std::fill(std::begin(m_counter_running), std::end(m_counter_running), false); std::fill(std::begin(m_alternate_count), std::end(m_alternate_count), false); - std::fill(std::begin(m_src), std::end(m_src), true); - std::fill(std::begin(m_gate), std::end(m_gate), true); - std::fill(std::begin(m_gate_alt), std::end(m_gate_alt), true); - std::fill(std::begin(m_gate_active), std::end(m_gate_active), true); std::fill(std::begin(m_tc), std::end(m_tc), false); std::fill(std::begin(m_toggle), std::end(m_toggle), false); + // Unused SRC and GATE inputs are typically grounded + std::fill(std::begin(m_src), std::end(m_src), false); + std::fill(std::begin(m_gate), std::end(m_gate), false); + std::fill(std::begin(m_gate_active), std::end(m_gate_active), false); + + // Alternate gate inputs should be tied high if not used + std::fill(std::begin(m_gate_alt), std::end(m_gate_alt), true); + // Set up frequency timers for (int f = 0; f < 5; f++) { |