msx.c: Start hooking up moonsound; not fully working yet (nw)

scripts/src/bus.lua

@@ -890,6 +890,8 @@ if (BUSES["MSX_SLOT"]~=null) then
 		MAME_DIR .. "src/emu/bus/msx_cart/korean.h",
 		MAME_DIR .. "src/emu/bus/msx_cart/majutsushi.c",
 		MAME_DIR .. "src/emu/bus/msx_cart/majutsushi.h",
+		MAME_DIR .. "src/emu/bus/msx_cart/moonsound.h",
+		MAME_DIR .. "src/emu/bus/msx_cart/moonsound.c",
 		MAME_DIR .. "src/emu/bus/msx_cart/msx_audio.c",
 		MAME_DIR .. "src/emu/bus/msx_cart/msx_audio.h",
 		MAME_DIR .. "src/emu/bus/msx_cart/msx_audio_kb.c",

scripts/target/mame/mess.lua

@@ -156,7 +156,7 @@ SOUNDS["YM3526"] = true
 SOUNDS["Y8950"] = true
 SOUNDS["YMF262"] = true
 --SOUNDS["YMF271"] = true
---SOUNDS["YMF278B"] = true
+SOUNDS["YMF278B"] = true
 --SOUNDS["YMZ280B"] = true
 SOUNDS["SN76477"] = true
 SOUNDS["SN76496"] = true

src/emu/bus/msx_cart/cartridge.c

@@ -16,6 +16,7 @@
 #include "konami.h"
 #include "korean.h"
 #include "majutsushi.h"
+#include "moonsound.h"
 #include "msx_audio.h"
 #include "msxdos2.h"
 #include "nomapper.h"
@@ -61,6 +62,7 @@ SLOT_INTERFACE_START(msx_cart)
 	SLOT_INTERFACE_INTERNAL("disk_fsfd1a", MSX_CART_FSFD1A)
 	SLOT_INTERFACE_INTERNAL("disk_fscf351", MSX_CART_FSCF351)
 	SLOT_INTERFACE("bm_012", MSX_CART_BM_012)
+	SLOT_INTERFACE("moonsound", MSX_CART_MOONSOUND)
 SLOT_INTERFACE_END
 
 

src/emu/bus/msx_cart/moonsound.c

@@ -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)
+- Fix FM support (ymf262 support needs to be added to ymf278b).
+
+**********************************************************************************/
+
+#include "emu.h"
+#include "moonsound.h"
+
+
+#define VERBOSE 0
+#define LOG(x) do { if (VERBOSE) logerror x; } while (0)
+
+
+const device_type MSX_CART_MOONSOUND = &device_creator<msx_cart_moonsound>;
+
+
+msx_cart_moonsound::msx_cart_moonsound(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+	: device_t(mconfig, MSX_CART_MOONSOUND, "MSX Cartridge - MOONSOUND", tag, owner, clock, "msx_cart_moonsound", __FILE__)
+	, msx_cart_interface(mconfig, *this)
+	, m_ymf278b(*this, "ymf278b")
+{
+}
+
+
+static ADDRESS_MAP_START( ymf278b_map, AS_0, 8, msx_cart_moonsound )
+	AM_RANGE(0x000000, 0x1fffff) AM_ROM
+	AM_RANGE(0x200000, 0x3fffff) AM_RAM  // 2MB sram for testing
+ADDRESS_MAP_END
+
+
+static MACHINE_CONFIG_FRAGMENT( moonsound )
+	// This is actually incorrect. The sound output is passed back into the MSX machine where it is mixed internally and output through the system 'speaker'.
+	MCFG_SPEAKER_STANDARD_MONO("mono")
+	MCFG_SOUND_ADD("ymf278b", YMF278B, YMF278B_STD_CLOCK)
+	MCFG_DEVICE_ADDRESS_MAP(AS_0, ymf278b_map)
+	MCFG_YMF278B_IRQ_HANDLER(WRITELINE(msx_cart_moonsound,irq_w))
+	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.40)
+MACHINE_CONFIG_END
+
+
+machine_config_constructor msx_cart_moonsound::device_mconfig_additions() const
+{
+	return MACHINE_CONFIG_NAME( moonsound );
+}
+
+
+ROM_START( msx_cart_moonsound )
+	ROM_REGION(0x400000, "ymf278b", 0)
+	ROM_LOAD("yrw801.rom", 0x0, 0x200000, CRC(2a9d8d43) SHA1(32760893ce06dbe3930627755ba065cc3d8ec6ca))
+ROM_END
+
+
+const rom_entry *msx_cart_moonsound::device_rom_region() const
+{
+	return ROM_NAME( msx_cart_moonsound );
+}
+
+
+void msx_cart_moonsound::device_start()
+{
+	m_out_irq_cb.resolve_safe();
+
+	// Install IO read/write handlers
+	address_space &space = machine().device<cpu_device>("maincpu")->space(AS_IO);
+	space.install_readwrite_handler(0x7e, 0x7f, read8_delegate(FUNC(msx_cart_moonsound::read_ymf278b_pcm), this), write8_delegate(FUNC(msx_cart_moonsound::write_ymf278b_pcm), this));
+	space.install_readwrite_handler(0xc4, 0xc7, read8_delegate(FUNC(msx_cart_moonsound::read_ymf278b_fm), this), write8_delegate(FUNC(msx_cart_moonsound::write_ymf278b_fm), this));
+	space.install_read_handler(0xc0, 0xc0, read8_delegate(FUNC(msx_cart_moonsound::read_c0), this));
+}
+
+
+void msx_cart_moonsound::device_reset()
+{
+}
+
+
+WRITE_LINE_MEMBER(msx_cart_moonsound::irq_w)
+{
+	LOG(("moonsound: irq state %d\n", state));
+	m_out_irq_cb(state);
+}
+
+
+WRITE8_MEMBER(msx_cart_moonsound::write_ymf278b_fm)
+{
+	LOG(("moonsound: write 0x%02x, data 0x%02x\n", 0xc4 + offset, data));
+	m_ymf278b->write(space, offset, data);
+}
+
+
+READ8_MEMBER(msx_cart_moonsound::read_ymf278b_fm)
+{
+	LOG(("moonsound: read 0x%02x\n", 0xc4 + offset));
+	return m_ymf278b->read(space, offset);
+}
+
+
+WRITE8_MEMBER(msx_cart_moonsound::write_ymf278b_pcm)
+{
+	LOG(("moonsound: write 0x%02x, data 0x%02x\n", 0x7e + offset, data));
+	m_ymf278b->write(space, 4 + offset, data);
+}
+
+
+READ8_MEMBER(msx_cart_moonsound::read_ymf278b_pcm)
+{
+	LOG(("moonsound: read 0x%02x\n", 0x7e + offset));
+	return m_ymf278b->read(space, 4 + offset);
+}
+
+
+// For detecting presence of moonsound cartridge
+READ8_MEMBER(msx_cart_moonsound::read_c0)
+{
+	LOG(("moonsound: read 0xc0\n"));
+	return 0x00;
+}
+

src/emu/bus/msx_cart/moonsound.h

@@ -0,0 +1,38 @@
+// license:BSD-3-Clause
+// copyright-holders:Wilbert Pol
+#ifndef __MSX_CART_MOONSOUND_H
+#define __MSX_CART_MOONSOUND_H
+
+#include "bus/msx_cart/cartridge.h"
+#include "sound/ymf278b.h"
+
+
+extern const device_type MSX_CART_MOONSOUND;
+
+
+class msx_cart_moonsound : public device_t
+						, public msx_cart_interface
+{
+public:
+	msx_cart_moonsound(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+	// device-level overrides
+	virtual void device_start();
+	virtual void device_reset();
+	virtual machine_config_constructor device_mconfig_additions() const;
+	virtual const rom_entry *device_rom_region() const;
+
+	DECLARE_WRITE8_MEMBER(write_ymf278b_fm);
+	DECLARE_READ8_MEMBER(read_ymf278b_fm);
+	DECLARE_WRITE8_MEMBER(write_ymf278b_pcm);
+	DECLARE_READ8_MEMBER(read_ymf278b_pcm);
+	DECLARE_READ8_MEMBER(read_c0);
+	DECLARE_WRITE_LINE_MEMBER(irq_w);
+
+private:
+	required_device<ymf278b_device> m_ymf278b;
+
+};
+
+
+#endif