diff options
Diffstat (limited to 'src/devices/bus/msx/cart/moonsound.cpp')
-rw-r--r-- | src/devices/bus/msx/cart/moonsound.cpp | 123 |
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 @@ -0,0 +1,123 @@ +// 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") |