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-rw-r--r--src/devices/sound/bbd.cpp127
1 files changed, 127 insertions, 0 deletions
diff --git a/src/devices/sound/bbd.cpp b/src/devices/sound/bbd.cpp
new file mode 100644
index 00000000000..f09a0e5ad3a
--- /dev/null
+++ b/src/devices/sound/bbd.cpp
@@ -0,0 +1,127 @@
+// license:BSD-3-Clause
+// copyright-holders:Aaron Giles
+#include "emu.h"
+#include "bbd.h"
+
+
+//**************************************************************************
+// BBD DEVICE BASE
+//**************************************************************************
+
+//-------------------------------------------------
+// bbd_device_base - constructor
+//-------------------------------------------------
+
+bbd_device_base::bbd_device_base(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock, device_type type) :
+ device_t(mconfig, type, tag, owner, clock),
+ device_sound_interface(mconfig, *this)
+{
+}
+
+void bbd_device_base::set_bucket_count(int buckets)
+{
+ m_buffer.resize(buckets);
+}
+
+void bbd_device_base::device_start()
+{
+ m_stream = stream_alloc(1, 1, SAMPLE_RATE_OUTPUT_ADAPTIVE, STREAM_SYNCHRONOUS);
+ save_item(NAME(m_buffer));
+ save_item(NAME(m_curpos));
+
+
+}
+
+void bbd_device_base::device_reset()
+{
+ std::fill(m_buffer.begin(), m_buffer.end(), 0);
+ m_curpos = 0;
+}
+
+void bbd_device_base::tick()
+{
+ u32 nextpos = m_curpos + 1;
+ if(nextpos == m_buffer.size())
+ nextpos = 0;
+ m_buffer[nextpos] = m_buffer[m_curpos];
+ m_curpos = nextpos;
+}
+
+void bbd_device_base::sound_stream_update(sound_stream &stream)
+{
+ u32 nextpos = m_curpos + 1;
+ if(nextpos == m_buffer.size())
+ nextpos = 0;
+ stream.put(0, 0, m_buffer[nextpos]);
+ m_buffer[m_curpos] = stream.get(0, 0);
+}
+
+
+//**************************************************************************
+// MN3004
+//**************************************************************************
+
+// device type definition
+DEFINE_DEVICE_TYPE(MN3004, mn3004_device, "mn3004", "MN3004 BBD")
+
+mn3004_device::mn3004_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ bbd_device_base(mconfig, tag, owner, clock, MN3004)
+{
+ set_bucket_count(512);
+}
+
+
+//**************************************************************************
+// MN3005
+//**************************************************************************
+
+// device type definition
+DEFINE_DEVICE_TYPE(MN3005, mn3005_device, "mn3005", "MN3005 BBD")
+
+mn3005_device::mn3005_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ bbd_device_base(mconfig, tag, owner, clock, MN3005)
+{
+ set_bucket_count(4096);
+}
+
+
+//**************************************************************************
+// MN3006
+//**************************************************************************
+
+// device type definition
+DEFINE_DEVICE_TYPE(MN3006, mn3006_device, "mn3006", "MN3006 BBD")
+
+mn3006_device::mn3006_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ bbd_device_base(mconfig, tag, owner, clock, MN3006)
+{
+ set_bucket_count(128);
+}
+
+
+//**************************************************************************
+// MN3204P
+//**************************************************************************
+
+// device type definition
+DEFINE_DEVICE_TYPE(MN3204P, mn3204p_device, "mn3204p", "MN3204P BBD")
+
+mn3204p_device::mn3204p_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ bbd_device_base(mconfig, tag, owner, clock, MN3204P)
+{
+ set_bucket_count(512);
+}
+
+
+//**************************************************************************
+// MN3207P
+//**************************************************************************
+
+// device type definition
+DEFINE_DEVICE_TYPE(MN3207, mn3207_device, "mn3207", "MN3207 BBD")
+
+mn3207_device::mn3207_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ bbd_device_base(mconfig, tag, owner, clock, MN3207)
+{
+ set_bucket_count(1024);
+}