bus/spectrum: Added The Music Machine

scripts/src/bus.lua

@@ -4842,6 +4842,8 @@ if (BUSES["SPECTRUM"]~=null) then
 		MAME_DIR .. "src/devices/bus/spectrum/mikroplus.h",
 		MAME_DIR .. "src/devices/bus/spectrum/mpoker.cpp",
 		MAME_DIR .. "src/devices/bus/spectrum/mpoker.h",
+		MAME_DIR .. "src/devices/bus/spectrum/musicmachine.cpp",
+		MAME_DIR .. "src/devices/bus/spectrum/musicmachine.h",
 		MAME_DIR .. "src/devices/bus/spectrum/opus.cpp",
 		MAME_DIR .. "src/devices/bus/spectrum/opus.h",
 		MAME_DIR .. "src/devices/bus/spectrum/plus2test.cpp",

src/devices/bus/cpc/musicmachine.cpp

@@ -2,7 +2,7 @@
 // copyright-holders:Barry Rodewald
 /*
  * The Music Machine - MIDI and sampling expansion
- * by Ram Electronics
+ * by Ram Electronics Ltd
  */
 
 #include "emu.h"
@@ -16,7 +16,7 @@
 //  DEVICE DEFINITIONS
 //**************************************************************************
 
-DEFINE_DEVICE_TYPE(CPC_MUSICMACHINE, cpc_musicmachine_device, "cpcmusic", "The Music Machine")
+DEFINE_DEVICE_TYPE(CPC_MUSICMACHINE, cpc_musicmachine_device, "cpcmusic", "The Music Machine (CPC)")
 
 
 void cpc_musicmachine_device::device_add_mconfig(machine_config &config)

src/devices/bus/spectrum/exp.cpp

@@ -167,6 +167,7 @@ void spectrum_expansion_slot_device::mreq_w(offs_t offset, uint8_t data)
 #include "mgt.h"
 #include "mikroplus.h"
 #include "mpoker.h"
+#include "musicmachine.h"
 #include "opus.h"
 #include "plus2test.h"
 #include "protek.h"
@@ -215,6 +216,7 @@ void spectrum_expansion_devices(device_slot_interface &device)
 	device.option_add("mikroplus", SPECTRUM_MIKROPLUS);
 	device.option_add("mpoker", SPECTRUM_MPOKER);
 	device.option_add("mprint", SPECTRUM_MPRINT);
+	device.option_add("musicmachine", SPECTRUM_MUSICMACHINE);
 	device.option_add("opus", SPECTRUM_OPUS);
 	device.option_add("plusd", SPECTRUM_PLUSD);
 	device.option_add("proceed", SPECTRUM_PROCEED);
@@ -244,6 +246,7 @@ void spec128_expansion_devices(device_slot_interface &device)
 	device.option_add("mface128", SPECTRUM_MFACE128);
 	device.option_add("mikroplus", SPECTRUM_MIKROPLUS);
 	device.option_add("mprint", SPECTRUM_MPRINT);
+	device.option_add("musicmachine", SPECTRUM_MUSICMACHINE);
 	device.option_add("opus", SPECTRUM_OPUS);
 	device.option_add("plusd", SPECTRUM_PLUSD);
 	device.option_add("plus2test", SPECTRUM_PLUS2TEST);
@@ -259,5 +262,6 @@ void specpls3_expansion_devices(device_slot_interface &device)
 {
 	device.option_add("kempjoy", SPECTRUM_KEMPJOY);
 	device.option_add("mface3", SPECTRUM_MFACE3);
+	device.option_add("musicmachine", SPECTRUM_MUSICMACHINE);
 }
 

src/devices/bus/spectrum/musicmachine.cpp

@@ -0,0 +1,114 @@
+// license:BSD-3-Clause
+// copyright-holders:Andrei I. Holub
+/*
+ * The Music Machine - MIDI and sampling expansion
+ * by Ram Electronics Ltd
+ */
+
+#include "emu.h"
+#include "musicmachine.h"
+
+#include "bus/midi/midi.h"
+#include "machine/clock.h"
+#include "speaker.h"
+
+
+//**************************************************************************
+//  DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(SPECTRUM_MUSICMACHINE, spectrum_musicmachine_device, "spectrummusic", "The Music Machine (ZX)")
+
+
+void spectrum_musicmachine_device::device_add_mconfig(machine_config &config)
+{
+	ACIA6850(config, m_acia).txd_handler().set("mdout", FUNC(midi_port_device::write_txd));
+	m_acia->irq_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::nmi_w));
+	MIDI_PORT(config, "mdin", midiin_slot, "midiin").rxd_handler().set(m_acia, FUNC(acia6850_device::write_rxd));
+	MIDI_PORT(config, "mdout", midiout_slot, "midiout");
+	clock_device &acia_clock(CLOCK(config, "acia_clock", 31250*16));
+	acia_clock.signal_handler().set(FUNC(spectrum_musicmachine_device::write_acia_clock));
+
+	SPEAKER(config, "speaker").front_center();
+	ZN429E(config, m_dac, 0).add_route(ALL_OUTPUTS, "speaker", 0.2);
+}
+
+//**************************************************************************
+//  LIVE DEVICE
+//**************************************************************************
+
+spectrum_musicmachine_device::spectrum_musicmachine_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) :
+	device_t(mconfig, SPECTRUM_MUSICMACHINE, tag, owner, clock)
+	, device_spectrum_expansion_interface(mconfig, *this)
+	, m_acia(*this,"acia")
+	, m_dac(*this,"dac")
+{
+}
+
+//-------------------------------------------------
+//  device_start - device-specific startup
+//-------------------------------------------------
+
+void spectrum_musicmachine_device::device_start()
+{
+}
+
+//-------------------------------------------------
+//  device_reset - device-specific reset
+//-------------------------------------------------
+
+void spectrum_musicmachine_device::device_reset()
+{
+	m_irq_select = false;
+}
+
+void spectrum_musicmachine_device::write_acia_clock(u8 data)
+{
+	m_acia->write_txc(data);
+	m_acia->write_rxc(data);
+}
+
+u8 spectrum_musicmachine_device::iorq_r(offs_t offset)
+{
+	u8 data = offset & 1 ? m_slot->fb_r() : 0xff;
+
+	switch (offset & 0xff)
+	{
+		case 0x7f:
+			if (offset == 0xfc7f)
+				data = m_acia->status_r();
+			else
+				data = m_acia->data_r();
+			break;
+		case 0xbf:
+			// TODO ADC_READ
+			break;
+		case 0xdf:
+			// TODO Strobe: ADC_START
+			break;
+	}
+
+	return data;
+}
+
+void spectrum_musicmachine_device::iorq_w(offs_t offset, u8 data)
+{
+	switch (offset & 0xff)
+	{
+		case 0x5f:
+			m_irq_select = data & 1;
+			break;
+		case 0x7f:
+			if (offset == 0xfc7f)
+				m_acia->control_w(data);
+			else
+				m_acia->data_w(data);
+			break;
+		case 0x9f:
+			m_dac->write(data);
+			break;
+		case 0xdf:
+			// TODO Strobe: ADC_START
+			break;
+	}
+}

src/devices/bus/spectrum/musicmachine.h

@@ -0,0 +1,49 @@
+// license:BSD-3-Clause
+// copyright-holders:Barry Rodewald
+/*
+ * The Music Machine - MIDI and sampling expansion
+ * by Ram Electronics
+ *
+ * Contains a 6850 AICA, Ferranti ZN429E8 DAC and ZN449 ADC
+ */
+
+#ifndef MAME_BUS_SPECTRUM_MUSICMACHINE_H
+#define MAME_BUS_SPECTRUM_MUSICMACHINE_H
+
+#pragma once
+
+#include "exp.h"
+#include "machine/6850acia.h"
+#include "sound/dac.h"
+
+class spectrum_musicmachine_device  : public device_t
+	, public device_spectrum_expansion_interface
+{
+public:
+	// construction/destruction
+	spectrum_musicmachine_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+
+	void write_acia_clock(u8 data);
+
+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;
+
+	virtual u8 iorq_r(offs_t offset) override;
+	virtual void iorq_w(offs_t offset, u8 data) override;
+
+private:
+	required_device<acia6850_device> m_acia;
+	required_device<dac_byte_interface> m_dac;
+
+	bool m_irq_select;
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(SPECTRUM_MUSICMACHINE, spectrum_musicmachine_device)
+
+#endif  // MAME_BUS_SPECTRUM_MUSICMACHINE_H