diff --git a/scripts/src/sound.lua b/scripts/src/sound.lua
index 1d6bed6ddb1..eff666cd356 100644
--- a/scripts/src/sound.lua
+++ b/scripts/src/sound.lua
@@ -1536,6 +1536,18 @@ if (SOUNDS["SWP30"]~=null) then
 	}
 end
 
+---------------------------------------------------
+--
+--@src/devices/sound/mu100b.h,SOUNDS["MU100B"] = true
+---------------------------------------------------
+
+if (SOUNDS["MU100B"]~=null) then
+	files {
+		MAME_DIR .. "src/devices/sound/mu100b.cpp",
+		MAME_DIR .. "src/devices/sound/mu100b.h",
+	}
+end
+
 ---------------------------------------------------
 -- Roland sample players
 --@src/devices/sound/rolandpcm.h,SOUNDS["ROLANDPCM"] = true
diff --git a/scripts/target/mame/arcade.lua b/scripts/target/mame/arcade.lua
index 4e3ac6b2d58..1c4f68c9e73 100644
--- a/scripts/target/mame/arcade.lua
+++ b/scripts/target/mame/arcade.lua
@@ -293,6 +293,8 @@ SOUNDS["KS0164"] = true
 SOUNDS["TT5665"] = true
 --SOUNDS["RP2C33_SOUND"] = true
 --SOUNDS["UDA1344"] = true
+SOUNDS["SWP30"] = true
+SOUNDS["MU100B"] = true
 
 --------------------------------------------------
 -- specify available video cores
diff --git a/scripts/target/mame/mess.lua b/scripts/target/mame/mess.lua
index 79d6c8a5da3..20dd16c820e 100644
--- a/scripts/target/mame/mess.lua
+++ b/scripts/target/mame/mess.lua
@@ -314,6 +314,7 @@ SOUNDS["IOPSPU"] = true
 SOUNDS["SWP00"] = true
 SOUNDS["SWP20"] = true
 SOUNDS["SWP30"] = true
+--SOUNDS["MU100B"] = true
 SOUNDS["S_DSP"] = true
 SOUNDS["ROLANDPCM"] = true
 --SOUNDS["TT5665"] = true
diff --git a/src/devices/sound/mu100b.cpp b/src/devices/sound/mu100b.cpp
new file mode 100644
index 00000000000..30fb9cf5514
--- /dev/null
+++ b/src/devices/sound/mu100b.cpp
@@ -0,0 +1,97 @@
+// license:BSD-3-Clause
+// copyright-holders:R. Belmont, Olivier Galibert
+
+/*************************************************************************************
+
+    Yamaha MU-100B : 32-voice polyphonic/multitimbral General MIDI/GS/XG tone modules
+
+    Embedded version
+
+**************************************************************************************/
+
+#include "emu.h"
+
+#include "mu100b.h"
+
+#include "bus/midi/midiinport.h"
+#include "bus/midi/midioutport.h"
+
+DEFINE_DEVICE_TYPE(MU100B, mu100b_device, "mu100b_emb", "Yamaha MU100B synth (embedded version)")
+
+#define ROM_LOAD16_WORD_SWAP_BIOS(bios,name,offset,length,hash) \
+		ROMX_LOAD(name, offset, length, hash, ROM_GROUPWORD | ROM_REVERSE | ROM_BIOS(bios))
+
+ROM_START( mu100b )
+	ROM_REGION( 0x200000, "maincpu", 0 )
+	// MU-100B v1.08 (Nov. 28, 1997)
+	ROM_LOAD16_WORD_SWAP( "xu50710-m27c160.bin", 0x000000, 0x200000, CRC(4b10bd27) SHA1(12d7c6e1bce7974b34916e1bfa5057ab55867476) )
+
+	ROM_REGION( 0x1800000, "swp30", ROMREGION_ERASE00 )
+	ROM_LOAD32_WORD( "sx518b0.ic34", 0x0000000, 0x400000, CRC(2550d44f) SHA1(fd3cce228c7d389a2fde25c808a5b26080588cba) )
+	ROM_LOAD32_WORD( "sx743b0.ic35", 0x0000002, 0x400000, CRC(a9109a6c) SHA1(a67bb49378a38a2d809bd717d286e18bc6496db0) )
+	ROM_LOAD32_WORD( "xt445a0-828.ic36", 0x0800000, 0x200000, CRC(225c2280) SHA1(23b5e046fd2e2ac01af3e6dc6357c5c6547b286b) )
+	ROM_LOAD32_WORD( "xt461a0-829.ic37", 0x0800002, 0x200000, CRC(a1d138a3) SHA1(46a7a7225cd7e1818ba551325d2af5ac1bf5b2bf) )
+	ROM_LOAD32_WORD( "xt462a0.ic39", 0x1000000, 0x400000, CRC(cbf037da) SHA1(37449e741243305de38cb913b17041942ad334cd) )
+	ROM_LOAD32_WORD( "xt463a0.ic38", 0x1000002, 0x400000, CRC(cce5f8d3) SHA1(bdca8c5158f452f2b5535c7d658c9b22c6d66048) )
+ROM_END
+
+mu100b_device::mu100b_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+	: device_t(mconfig, MU100B, tag, owner, clock)
+	, device_mixer_interface(mconfig, *this, 2)
+	, m_maincpu(*this, "maincpu")
+	, m_swp30(*this, "swp30")
+	, m_midi_serial(*this, "maincpu:sci1")
+{
+}
+
+const tiny_rom_entry *mu100b_device::device_rom_region() const
+{
+	return ROM_NAME(mu100b);
+}
+
+void mu100b_device::device_start()
+{
+}
+
+void mu100b_device::device_reset()
+{
+}
+
+void mu100b_device::mu100_map(address_map &map)
+{
+	map(0x000000, 0x1fffff).rom().region("maincpu", 0);
+	map(0x200000, 0x21ffff).ram(); // 128K work RAM
+	map(0x400000, 0x401fff).m(m_swp30, FUNC(swp30_device::map));
+}
+
+void mu100b_device::mu100_iomap(address_map &map)
+{
+	map(h8_device::ADC_0, h8_device::ADC_0).lr16(NAME([]() -> u16 { return 0; }));
+	map(h8_device::ADC_1, h8_device::ADC_1).lr16(NAME([]() -> u16 { return 0; }));
+	map(h8_device::ADC_2, h8_device::ADC_2).lr16(NAME([]() -> u16 { return 0; }));
+	map(h8_device::ADC_1, h8_device::ADC_3).lr16(NAME([]() -> u16 { return 0; }));
+	map(h8_device::ADC_4, h8_device::ADC_4).lr16(NAME([]() -> u16 { return 0; }));
+	map(h8_device::ADC_5, h8_device::ADC_5).lr16(NAME([]() -> u16 { return 0; }));
+	map(h8_device::ADC_6, h8_device::ADC_6).lr16(NAME([]() -> u16 { return 0x200; }));
+	map(h8_device::ADC_7, h8_device::ADC_7).lr16(NAME([]() -> u16 { return 0x200; }));
+}
+
+void mu100b_device::swp30_map(address_map &map)
+{
+	map(0x000000*4, 0x200000*4-1).rom().region("swp30",         0).mirror(4*0x200000);
+	map(0x400000*4, 0x500000*4-1).rom().region("swp30",  0x800000).mirror(4*0x300000);
+	map(0x800000*4, 0xa00000*4-1).rom().region("swp30", 0x1000000).mirror(4*0x200000);
+}
+
+void mu100b_device::device_add_mconfig(machine_config &config)
+{
+	H8S2655(config, m_maincpu, 16_MHz_XTAL);
+	m_maincpu->set_addrmap(AS_PROGRAM, &mu100b_device::mu100_map);
+	m_maincpu->set_addrmap(AS_IO, &mu100b_device::mu100_iomap);
+
+	SWP30(config, m_swp30);
+	m_swp30->set_addrmap(0, &mu100b_device::swp30_map);
+	m_swp30->add_route(0, *this, 1.0, AUTO_ALLOC_INPUT, 0);
+	m_swp30->add_route(1, *this, 1.0, AUTO_ALLOC_INPUT, 1);
+}
+
diff --git a/src/devices/sound/mu100b.h b/src/devices/sound/mu100b.h
new file mode 100644
index 00000000000..1c0fd25abdd
--- /dev/null
+++ b/src/devices/sound/mu100b.h
@@ -0,0 +1,43 @@
+// license:BSD-3-Clause
+// copyright-holders:R. Belmont, Olivier Galibert
+
+/*************************************************************************************
+
+    Yamaha MU-100B : 32-voice polyphonic/multitimbral General MIDI/GS/XG tone modules
+
+    Embedded version
+
+**************************************************************************************/
+
+#ifndef DEVICE_SOUND_MU100B_H
+#define DEVICE_SOUND_MU100B_H
+
+#include "cpu/h8/h8s2655.h"
+#include "sound/swp30.h"
+
+class mu100b_device : public device_t, public device_mixer_interface
+{
+public:
+	mu100b_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
+
+	void midi_w(int state) { m_midi_serial->rx_w(state); }
+
+protected:
+	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:
+	required_device<h8s2655_device> m_maincpu;
+	required_device<swp30_device> m_swp30;
+	required_device<h8_sci_device> m_midi_serial;
+
+	void mu100_iomap(address_map &map);
+	void mu100_map(address_map &map);
+	void swp30_map(address_map &map);
+};
+
+DECLARE_DEVICE_TYPE(MU100B, mu100b_device)
+
+#endif
diff --git a/src/mame/drivers/firebeat.cpp b/src/mame/drivers/firebeat.cpp
index 32d26a77695..781cf5129f9 100644
--- a/src/mame/drivers/firebeat.cpp
+++ b/src/mame/drivers/firebeat.cpp
@@ -153,6 +153,7 @@
 #include "machine/rtc65271.h"
 #include "machine/timer.h"
 #include "sound/cdda.h"
+#include "sound/mu100b.h"
 #include "sound/rf5c400.h"
 #include "sound/ymz280b.h"
 #include "video/k057714.h"
@@ -1878,6 +1879,12 @@ void firebeat_kbm_state::firebeat_kbm(machine_config &config)
 	auto &midi_chan0(NS16550(config, "duart_midi:chan0", XTAL(24'000'000)));
 	MIDI_KBD(config, m_kbd[1], 31250).tx_callback().set(midi_chan0, FUNC(ins8250_uart_device::rx_w));
 	midi_chan0.out_int_callback().set(FUNC(firebeat_kbm_state::midi_keyboard_right_irq_callback));
+
+	// Synth card
+	auto &mu100b(MU100B(config, "mu100b"));
+	midi_chan1.out_tx_callback().set(mu100b, FUNC(mu100b_device::midi_w));
+	mu100b.add_route(0, "lspeaker", 1.0);
+	mu100b.add_route(1, "rspeaker", 1.0);
 }
 
 void firebeat_kbm_state::firebeat_kbm_map(address_map &map)