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-rw-r--r--src/devices/sound/roland_gp.cpp78
1 files changed, 78 insertions, 0 deletions
diff --git a/src/devices/sound/roland_gp.cpp b/src/devices/sound/roland_gp.cpp
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+++ b/src/devices/sound/roland_gp.cpp
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+// license:BSD-3-Clause
+// copyright-holders:giulioz
+
+// Initial skeleton based on the RE work by nukeykt
+
+#include "emu.h"
+#include "roland_gp.h"
+
+// Original chip (GP-2) TODO
+// DEFINE_DEVICE_TYPE(TC24SC201AF, tc6116_device, "tc24sc201af", "Roland GP TC24SC201AF PCM")
+
+// Newer chip (GP-4) including bugfixes and H8/500 cpu glue logic
+DEFINE_DEVICE_TYPE(TC6116, tc6116_device, "tc6116", "Roland GP TC6116 PCM")
+
+
+tc6116_device::tc6116_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, TC6116, tag, owner, clock)
+ , device_sound_interface(mconfig, *this)
+ , device_rom_interface(mconfig, *this)
+ , m_int_callback(*this)
+ , m_clock(0)
+ , m_rate(0)
+ , m_stream(nullptr)
+ , m_sel_chn(0)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void tc6116_device::device_start()
+{
+ m_clock = clock() / 2;
+ m_rate = m_clock / 512; // usually 32 KHz
+
+ m_stream = stream_alloc(0, 2, m_rate);
+
+ logerror("Roland GP: Clock %u, Rate %u\n", m_clock, m_rate);
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void tc6116_device::device_reset()
+{
+ m_int_callback(CLEAR_LINE);
+}
+
+//-------------------------------------------------
+// rom_bank_pre_change - refresh the stream if the
+// ROM banking changes
+//-------------------------------------------------
+
+void tc6116_device::rom_bank_pre_change()
+{
+ // unused right now
+ m_stream->update();
+}
+
+
+u8 tc6116_device::read(offs_t offset)
+{
+ return 0xff;
+}
+
+void tc6116_device::write(offs_t offset, u8 data)
+{
+}
+
+//-------------------------------------------------
+// sound_stream_update - handle a stream update
+//-------------------------------------------------
+
+void tc6116_device::sound_stream_update(sound_stream &stream)
+{
+}