bus/cbus: initial hookup for PC-98 Sound Blaster 16

scripts/src/bus.lua

@@ -5252,6 +5252,8 @@ if (BUSES["CBUS"]~=null) then
 	files {
 		MAME_DIR .. "src/devices/bus/cbus/amd98.cpp",
 		MAME_DIR .. "src/devices/bus/cbus/amd98.h",
+		MAME_DIR .. "src/devices/bus/cbus/mpu_pc98.cpp",
+		MAME_DIR .. "src/devices/bus/cbus/mpu_pc98.h",
 		MAME_DIR .. "src/devices/bus/cbus/pc9801_26.cpp",
 		MAME_DIR .. "src/devices/bus/cbus/pc9801_26.h",
 		MAME_DIR .. "src/devices/bus/cbus/pc9801_55.cpp",
@@ -5260,12 +5262,12 @@ if (BUSES["CBUS"]~=null) then
 		MAME_DIR .. "src/devices/bus/cbus/pc9801_86.h",
 		MAME_DIR .. "src/devices/bus/cbus/pc9801_118.cpp",
 		MAME_DIR .. "src/devices/bus/cbus/pc9801_118.h",
-		MAME_DIR .. "src/devices/bus/cbus/pc9801_snd.cpp",
-		MAME_DIR .. "src/devices/bus/cbus/pc9801_snd.h",
-		MAME_DIR .. "src/devices/bus/cbus/mpu_pc98.cpp",
-		MAME_DIR .. "src/devices/bus/cbus/mpu_pc98.h",
 		MAME_DIR .. "src/devices/bus/cbus/pc9801_cbus.cpp",
 		MAME_DIR .. "src/devices/bus/cbus/pc9801_cbus.h",
+		MAME_DIR .. "src/devices/bus/cbus/pc9801_snd.cpp",
+		MAME_DIR .. "src/devices/bus/cbus/pc9801_snd.h",
+		MAME_DIR .. "src/devices/bus/cbus/sb16_ct2720.cpp",
+		MAME_DIR .. "src/devices/bus/cbus/sb16_ct2720.h",
 	}
 end
 

src/devices/bus/cbus/mpu_pc98.h

@@ -12,7 +12,7 @@
 //  TYPE DEFINITIONS
 //**************************************************************************
 
-// ======================> isa8_mpu401_device
+// ======================> mpu_pc98_device
 
 class mpu_pc98_device : public device_t
 {

src/devices/bus/cbus/sb16_ct2720.cpp

@@ -0,0 +1,101 @@
+// license:BSD-3-Clause
+// copyright-holders:Angelo Salese
+/**************************************************************************************************
+
+Creative Sound Blaster 16 for PC-9800 Series (board name: CT2720)
+
+References:
+- https://j02.nobody.jp/jto98/n_desk_sound/ct2720.htm
+- http://retropc.net/yasuma/V2/PC/SOUND/ct2720.html
+
+TODO:
+- Optional YM2203 (+ ROM socket), PC-9801-26K equivalent fallback;
+- Game port;
+- MIDI;
+- CT1741 (DSP);
+- CT1745 (Mixer);
+- CD-Rom interface/CD-In;
+- Mic-In/Line-In;
+- Configuration dips;
+
+**************************************************************************************************/
+
+#include "emu.h"
+#include "bus/cbus/sb16_ct2720.h"
+#include "speaker.h"
+
+
+DEFINE_DEVICE_TYPE(SB16_CT2720, sb16_ct2720_device, "sb16_ct2720", "Creative Sound Blaster 16 CT-2720")
+
+sb16_ct2720_device::sb16_ct2720_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+	: device_t(mconfig, SB16_CT2720, tag, owner, clock)
+	, m_bus(*this, DEVICE_SELF_OWNER)
+	, m_opl3(*this, "opl3")
+	, m_ldac(*this, "ldac")
+	, m_rdac(*this, "rdac")
+{
+}
+
+void sb16_ct2720_device::device_add_mconfig(machine_config &config)
+{
+	SPEAKER(config, "lspeaker").front_left();
+	SPEAKER(config, "rspeaker").front_right();
+
+	DAC_16BIT_R2R(config, m_ldac, 0).add_route(ALL_OUTPUTS, "lspeaker", 0.5); // unknown DAC
+	DAC_16BIT_R2R(config, m_rdac, 0).add_route(ALL_OUTPUTS, "rspeaker", 0.5); // unknown DAC
+
+//  PC_JOY(config, m_joy);
+
+//  MIDI_PORT(config, "mdin", midiin_slot, "midiin").rxd_handler().set(FUNC(sb_device::midi_rx_w));
+//  MIDI_PORT(config, "mdout", midiout_slot, "midiout");
+
+	YMF262(config, m_opl3, XTAL(14'318'181));
+	m_opl3->add_route(0, "lspeaker", 1.0);
+	m_opl3->add_route(1, "rspeaker", 1.0);
+	m_opl3->add_route(2, "lspeaker", 1.0);
+	m_opl3->add_route(3, "rspeaker", 1.0);
+}
+
+void sb16_ct2720_device::device_start()
+{
+	m_bus->install_device(0x0000, 0xffff, *this, &sb16_ct2720_device::io_map);
+}
+
+void sb16_ct2720_device::device_reset()
+{
+}
+
+void sb16_ct2720_device::io_map(address_map &map)
+{
+	const u16 base = 0xd2;
+//  map(0x0400 | base, 0x0400 | base).select(0x300) PC Gameport
+	map(0x2000 | base, 0x2000 | base).select(0x300).lrw8(
+		NAME([this] (offs_t offset) {
+			return m_opl3->read(offset >> 8);
+		}),
+		NAME([this] (offs_t offset, u8 data) {
+			m_opl3->write(offset >> 8, data);
+		})
+	);
+//  map(0x2400 | base, 0x2400 | base).select(0x100) CT1745 mixer ($224-$225 on AT)
+//  map(0x2600 | base, 0x2600 | base) CT1741 DSP reset
+	map(0x2800 | base, 0x2800 | base).select(0x100).lrw8(
+		NAME([this] (offs_t offset) {
+			return m_opl3->read(offset >> 8);
+		}),
+		NAME([this] (offs_t offset, u8 data) {
+			m_opl3->write(offset >> 8, data);
+		})
+	);
+//  map(0x2a00 | base, 0x2a00 | base) CT1741 DSP read data port
+//  map(0x2c00 | base, 0x2c00 | base).select(0x300) CT1741 DSP ($22c-$22f on AT)
+//  map(0x8000 | base, 0x8000 | base).select(0x100) MIDI port/Wave Blaster
+	map(0xc800 | base, 0xc800 | base).select(0x300).lrw8(
+		NAME([this] (offs_t offset) {
+			return m_opl3->read(offset >> 8);
+		}),
+		NAME([this] (offs_t offset, u8 data) {
+			m_opl3->write(offset >> 8, data);
+		})
+	);
+}

src/devices/bus/cbus/sb16_ct2720.h

@@ -0,0 +1,50 @@
+// license:BSD-3-Clause
+// copyright-holders:Angelo Salese
+
+#ifndef MAME_BUS_CBUS_SB16_CT2720_H
+
+#pragma once
+
+#include "bus/cbus/pc9801_cbus.h"
+//#include "bus/midi/midi.h"
+//#include "bus/pc_joy/pc_joy.h"
+#include "sound/dac.h"
+//#include "sound/saa1099.h"
+#include "sound/ymopl.h"
+//#include "diserial.h"
+
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+class sb16_ct2720_device : public device_t
+{
+public:
+	// construction/destruction
+	sb16_ct2720_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+	static constexpr feature_type unemulated_features() { return feature::SOUND | feature::MICROPHONE; }
+
+protected:
+	// device-level overrides
+	virtual void device_start() override ATTR_COLD;
+	virtual void device_reset() override ATTR_COLD;
+
+	// optional information overrides
+	virtual void device_add_mconfig(machine_config &config) override ATTR_COLD;
+
+private:
+	void io_map(address_map &map) ATTR_COLD;
+
+	required_device<pc9801_slot_device> m_bus;
+	required_device<ymf262_device> m_opl3;
+	required_device<dac_16bit_r2r_device> m_ldac;
+	required_device<dac_16bit_r2r_device> m_rdac;
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(SB16_CT2720, sb16_ct2720_device)
+
+#endif // MAME_BUS_CBUS_SB16_H

src/mame/nec/pc9801.cpp

@@ -1936,6 +1936,7 @@ static void pc9801_cbus_devices(device_slot_interface &device)
 //  Spark Board
 	device.option_add("amd98",      AMD98);
 	device.option_add("mpu_pc98",   MPU_PC98);
+	device.option_add("sb16",       SB16_CT2720);
 
 	// doujinshi HW
 // MAD Factory / Doujin Hard (同人ハード)

src/mame/nec/pc9801.h

@@ -53,6 +53,8 @@
 #include "bus/cbus/pc9801_118.h"
 #include "bus/cbus/mpu_pc98.h"
 #include "bus/cbus/pc9801_cbus.h"
+#include "bus/cbus/sb16_ct2720.h"
+
 #include "pc9801_kbd.h"
 #include "pc9801_cd.h"