New machines marked as NOT_WORKING

----------------------------------
Roland MC-300 Micro Composer [DBWBP]
Roland MC-50 Micro Composer [DBWBP]
Roland MC-50mkII Micro Composer [DBWBP]

scripts/target/mame/mess.lua

@@ -3282,6 +3282,7 @@ files {
 	MAME_DIR .. "src/mame/drivers/roland_jv80.cpp",
 	MAME_DIR .. "src/mame/drivers/roland_jx3p.cpp",
 	MAME_DIR .. "src/mame/drivers/roland_jx8p.cpp",
+	MAME_DIR .. "src/mame/drivers/roland_mc50.cpp",
 	MAME_DIR .. "src/mame/drivers/roland_mt32.cpp",
 	MAME_DIR .. "src/mame/drivers/roland_r8.cpp",
 	MAME_DIR .. "src/mame/drivers/roland_ra30.cpp",

src/mame/drivers/roland_mc50.cpp

@@ -0,0 +1,131 @@
+// license:BSD-3-Clause
+// copyright-holders:AJR
+/****************************************************************************
+
+    Skeleton driver for Roland MC-50 & similar MIDI sequencers.
+
+****************************************************************************/
+
+#include "emu.h"
+//#include "bus/midi/midi.h"
+#include "cpu/z180/z180.h"
+#include "imagedev/floppy.h"
+#include "machine/wd_fdc.h"
+
+class roland_mc50_state : public driver_device
+{
+public:
+	roland_mc50_state(const machine_config &mconfig, device_type type, const char *tag)
+		: driver_device(mconfig, type, tag)
+		, m_mpu(*this, "mpu")
+		, m_wdfdc(*this, "wdfdc")
+		, m_wdfdd(*this, "wdfdc:0")
+	{
+	}
+
+	void mc300(machine_config &config);
+	void mc50(machine_config &config);
+	void mc50mk2(machine_config &config);
+
+private:
+	void mem_map_mc300(address_map &map);
+	void mem_map_mc50(address_map &map);
+	void io_map(address_map &map);
+
+	required_device<z180_device> m_mpu;
+	optional_device<wd1772_device> m_wdfdc;
+	//optional_device<hd63266_device> m_hdfdc;
+	optional_device<floppy_connector> m_wdfdd;
+};
+
+void roland_mc50_state::mem_map_mc300(address_map &map)
+{
+	map(0x00000, 0x01fff).rom().region("mpurom", 0);
+	map(0x40000, 0xfffff).ram();
+}
+
+void roland_mc50_state::mem_map_mc50(address_map &map)
+{
+	map(0x00000, 0x3ffff).rom().region("mpurom", 0);
+	map(0x40000, 0x7ffff).ram();
+	map(0x80000, 0xfffff).rom().region("mpurom", 0);
+}
+
+void roland_mc50_state::io_map(address_map &map)
+{
+	map(0x0000, 0x003f).noprw(); // internal registers
+	map(0x00c0, 0x00c3).mirror(0xff00).rw(m_wdfdc, FUNC(wd1772_device::read), FUNC(wd1772_device::write));
+}
+
+static INPUT_PORTS_START(mc50)
+INPUT_PORTS_END
+
+static void mc50_floppies(device_slot_interface &device)
+{
+	device.option_add("35dd", FLOPPY_35_DD);
+}
+
+void roland_mc50_state::mc300(machine_config &config)
+{
+	Z80180(config, m_mpu, 10_MHz_XTAL);
+	m_mpu->set_addrmap(AS_PROGRAM, &roland_mc50_state::mem_map_mc300);
+	m_mpu->set_addrmap(AS_IO, &roland_mc50_state::io_map);
+
+	//bu3904s_device &fsk(BU3904S(config, "fsk", 10_MHz_XTAL / 2));
+	//fsk.xint_callback().set_inputline(m_mpu, Z180_INPUT_LINE_IRQ0);
+
+	WD1772(config, m_wdfdc, 8_MHz_XTAL);
+	m_wdfdc->intrq_wr_callback().set_inputline(m_mpu, Z180_INPUT_LINE_IRQ1);
+	m_wdfdc->drq_wr_callback().set_inputline(m_mpu, Z180_INPUT_LINE_DREQ0);
+
+	FLOPPY_CONNECTOR(config, m_wdfdd, mc50_floppies, "35dd", floppy_image_device::default_floppy_formats);
+}
+
+void roland_mc50_state::mc50(machine_config &config)
+{
+	Z80180(config, m_mpu, 10_MHz_XTAL); // HD64180R1F6
+	m_mpu->set_addrmap(AS_PROGRAM, &roland_mc50_state::mem_map_mc50);
+	m_mpu->set_addrmap(AS_IO, &roland_mc50_state::io_map);
+
+	//mn53015_device &fsk(MN53015(config, "fsk", 10_MHz_XTAL / 2));
+	//fsk.int_callback().set_inputline(m_mpu, Z180_INPUT_LINE_IRQ0);
+
+	WD1772(config, m_wdfdc, 8_MHz_XTAL); // WD1772-02
+	m_wdfdc->intrq_wr_callback().set_inputline(m_mpu, Z180_INPUT_LINE_IRQ1);
+	m_wdfdc->drq_wr_callback().set_inputline(m_mpu, Z180_INPUT_LINE_DREQ0);
+	m_wdfdc->dden_w(0);
+
+	FLOPPY_CONNECTOR(config, m_wdfdd, mc50_floppies, "35dd", floppy_image_device::default_floppy_formats);
+
+	// TODO: LCD unit (EA-D20225PX-1)
+}
+
+void roland_mc50_state::mc50mk2(machine_config &config)
+{
+	mc50(config);
+
+	//config.device_remove("wdfdc");
+	//HD63266(config, m_hdfdc, 16_MHz_XTAL); // HD63266F
+}
+
+ROM_START(mc300)
+	ROM_REGION(0x2000, "mpurom", 0)
+	ROM_SYSTEM_BIOS(0, "v102", "Version 1.02")
+	ROMX_LOAD("osv1.02-27c64.bin", 0x0000, 0x2000, CRC(a509d5b2) SHA1(d5b23aa2514610d3a5b3f33bdf4479fdb8dc91bd), ROM_BIOS(0))
+	ROM_SYSTEM_BIOS(1, "v101", "Version 1.01")
+	ROMX_LOAD("osv1.01-27c64.bin", 0x0000, 0x2000, CRC(459fd2a1) SHA1(5cea936807c80945ac39d0e7ecc63d3a2b968664), ROM_BIOS(1))
+ROM_END
+
+ROM_START(mc50)
+	ROM_REGION(0x80000, "mpurom", 0)
+	ROM_LOAD("mc50_mk1.ic9", 0x00000, 0x80000, CRC(322b5f73) SHA1(f5cb5738f03c51d7019a661ac660ecea56b44350))
+ROM_END
+
+ROM_START(mc50mk2)
+	ROM_REGION(0x80000, "mpurom", 0)
+	ROM_LOAD("mc50_mkii-firmware-v.0060.ic7", 0x00000, 0x80000, CRC(a428e378) SHA1(ac411c33ef79cf9ae51c5d5dbb1ed9ea5839db3e))
+ROM_END
+
+SYST(1988, mc300,   0, 0, mc300,   mc50, roland_mc50_state, empty_init, "Roland", "MC-300 Micro Composer", MACHINE_IS_SKELETON)
+SYST(1990, mc50,    0, 0, mc50,    mc50, roland_mc50_state, empty_init, "Roland", "MC-50 Micro Composer", MACHINE_IS_SKELETON)
+SYST(1992, mc50mk2, 0, 0, mc50mk2, mc50, roland_mc50_state, empty_init, "Roland", "MC-50mkII Micro Composer", MACHINE_IS_SKELETON)

src/mame/mame.lst

@@ -34655,6 +34655,11 @@ jx8p                            //
 jx8po                           //
 mks70                           //
 
+@source:roland_mc50.cpp
+mc300                           //
+mc50                            //
+mc50mk2                         //
+
 @source:roland_mt32.cpp
 cm32l                           //
 mt32                            //

src/mame/mess.flt

@@ -763,6 +763,7 @@ roland_d50.cpp
 roland_jv80.cpp
 roland_jx3p.cpp
 roland_jx8p.cpp
+roland_mc50.cpp
 roland_mt32.cpp
 roland_r8.cpp
 roland_ra30.cpp