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Diffstat (limited to 'src/devices/bus/msx/cart/moonsound.cpp')
-rw-r--r--src/devices/bus/msx/cart/moonsound.cpp123
1 files changed, 123 insertions, 0 deletions
diff --git a/src/devices/bus/msx/cart/moonsound.cpp b/src/devices/bus/msx/cart/moonsound.cpp
new file mode 100644
index 00000000000..8de78bf5d40
--- /dev/null
+++ b/src/devices/bus/msx/cart/moonsound.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Wilbert Pol
+/**********************************************************************************
+
+TODO:
+- Properly hook up correct SRAM sizes for different moonsound compatible
+ cartridges. (Original moonsound has 128KB SRAM)
+
+**********************************************************************************/
+
+#include "emu.h"
+#include "moonsound.h"
+
+#include "sound/ymopl.h"
+
+#include "speaker.h"
+
+
+#define VERBOSE 0
+#include "logmacro.h"
+
+namespace {
+
+class msx_cart_moonsound_device : public device_t, public msx_cart_interface
+{
+public:
+ msx_cart_moonsound_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : device_t(mconfig, MSX_CART_MOONSOUND, tag, owner, clock)
+ , msx_cart_interface(mconfig, *this)
+ , m_ymf278b(*this, "ymf278b")
+ { }
+
+protected:
+ // device_t implementation
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual const tiny_rom_entry *device_rom_region() const override;
+
+private:
+ void irq_w(int state);
+ void write_ymf278b_pcm(offs_t offset, u8 data);
+ u8 read_ymf278b_pcm(offs_t offset);
+ u8 read_c0();
+ void ymf278b_map(address_map &map);
+
+ required_device<ymf278b_device> m_ymf278b;
+};
+
+void msx_cart_moonsound_device::ymf278b_map(address_map &map)
+{
+ map(0x000000, 0x1fffff).rom();
+ map(0x200000, 0x3fffff).ram(); // 2MB sram for testing
+}
+
+void msx_cart_moonsound_device::device_add_mconfig(machine_config &config)
+{
+ // The moonsound cartridge has a separate stereo output.
+ SPEAKER(config, "lspeaker").front_left();
+ SPEAKER(config, "rspeaker").front_right();
+
+ YMF278B(config, m_ymf278b, 33.8688_MHz_XTAL);
+ m_ymf278b->set_addrmap(0, &msx_cart_moonsound_device::ymf278b_map);
+ m_ymf278b->irq_handler().set(FUNC(msx_cart_moonsound_device::irq_w));
+ m_ymf278b->add_route(0, "lspeaker", 0.50);
+ m_ymf278b->add_route(1, "rspeaker", 0.50);
+ m_ymf278b->add_route(2, "lspeaker", 0.40);
+ m_ymf278b->add_route(3, "rspeaker", 0.40);
+ m_ymf278b->add_route(4, "lspeaker", 0.50);
+ m_ymf278b->add_route(5, "rspeaker", 0.50);
+}
+
+ROM_START(msx_cart_moonsound)
+ ROM_REGION(0x400000, "ymf278b", 0)
+ ROM_LOAD("yrw801.rom", 0x0, 0x200000, CRC(2a9d8d43) SHA1(32760893ce06dbe3930627755ba065cc3d8ec6ca))
+ROM_END
+
+const tiny_rom_entry *msx_cart_moonsound_device::device_rom_region() const
+{
+ return ROM_NAME(msx_cart_moonsound);
+}
+
+void msx_cart_moonsound_device::device_start()
+{
+ // Install IO read/write handlers
+ io_space().install_readwrite_handler(0x7e, 0x7f, emu::rw_delegate(*this, FUNC(msx_cart_moonsound_device::read_ymf278b_pcm)), emu::rw_delegate(*this, FUNC(msx_cart_moonsound_device::write_ymf278b_pcm)));
+ io_space().install_readwrite_handler(0xc4, 0xc7, emu::rw_delegate(m_ymf278b, FUNC(ymf278b_device::read)), emu::rw_delegate(m_ymf278b, FUNC(ymf278b_device::write)));
+ io_space().install_read_handler(0xc0, 0xc0, emu::rw_delegate(*this, FUNC(msx_cart_moonsound_device::read_c0)));
+}
+
+void msx_cart_moonsound_device::device_reset()
+{
+}
+
+void msx_cart_moonsound_device::irq_w(int state)
+{
+ LOG("moonsound: irq state %d\n", state);
+ irq_out(state);
+}
+
+void msx_cart_moonsound_device::write_ymf278b_pcm(offs_t offset, u8 data)
+{
+ LOG("moonsound: write 0x%02x, data 0x%02x\n", 0x7e + offset, data);
+ m_ymf278b->write(4 + offset, data);
+}
+
+u8 msx_cart_moonsound_device::read_ymf278b_pcm(offs_t offset)
+{
+ LOG("moonsound: read 0x%02x\n", 0x7e + offset);
+ return m_ymf278b->read(4 + offset);
+}
+
+// For detecting presence of moonsound cartridge
+u8 msx_cart_moonsound_device::read_c0()
+{
+ LOG("moonsound: read 0xc0\n");
+ return 0x00;
+}
+
+} // anonymous namespace
+
+DEFINE_DEVICE_TYPE_PRIVATE(MSX_CART_MOONSOUND, msx_cart_interface, msx_cart_moonsound_device, "msx_moonsound", "MSX Cartridge - MoonSound")