Add skeleton Apple Sound Chip device (no whatsnew)

.gitattributes

@@ -870,6 +870,8 @@ src/emu/sound/aica.h svneol=native#text/plain
 src/emu/sound/aicadsp.c svneol=native#text/plain
 src/emu/sound/aicadsp.h svneol=native#text/plain
 src/emu/sound/aicalfo.c svneol=native#text/plain
+src/emu/sound/asc.c svneol=native#text/plain
+src/emu/sound/asc.h svneol=native#text/plain
 src/emu/sound/astrocde.c svneol=native#text/plain
 src/emu/sound/astrocde.h svneol=native#text/plain
 src/emu/sound/ay8910.c svneol=native#text/plain

src/emu/sound/asc.c

@@ -0,0 +1,190 @@
+/***************************************************************************
+
+    asc.c
+
+    Apple Sound Chip (ASC) 344S0063
+    Enhanced Apple Sound Chip (EASC) 343S1063
+    
+    Emulation by R. Belmont
+
+***************************************************************************/
+
+#include "emu.h"
+#include "streams.h"
+#include "asc.h"
+
+//**************************************************************************
+//  GLOBAL VARIABLES
+//**************************************************************************
+
+//**************************************************************************
+//  DEVICE CONFIGURATION
+//**************************************************************************
+
+//-------------------------------------------------
+//  static_set_type - configuration helper to set
+//  the chip type
+//-------------------------------------------------
+
+void asc_device_config::static_set_type(device_config *device, int type)
+{
+	asc_device_config *asc = downcast<asc_device_config *>(device);
+	asc->m_type = type;
+}
+
+//-------------------------------------------------
+//  asc_device_config - constructor
+//-------------------------------------------------
+
+asc_device_config::asc_device_config(const machine_config &mconfig, const char *tag, const device_config *owner, UINT32 clock)
+	: device_config(mconfig, static_alloc_device_config, "ASC", tag, owner, clock),
+	  device_config_sound_interface(mconfig, *this)
+{
+}
+
+
+//-------------------------------------------------
+//  static_alloc_device_config - allocate a new
+//  configuration object
+//-------------------------------------------------
+
+device_config *asc_device_config::static_alloc_device_config(const machine_config &mconfig, const char *tag, const device_config *owner, UINT32 clock)
+{
+	return global_alloc(asc_device_config(mconfig, tag, owner, clock));
+}
+
+
+//-------------------------------------------------
+//  alloc_device - allocate a new device object
+//-------------------------------------------------
+
+device_t *asc_device_config::alloc_device(running_machine &machine) const
+{
+	return auto_alloc(&machine, asc_device(machine, *this));
+}
+
+//**************************************************************************
+//  LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+//  asc_device - constructor
+//-------------------------------------------------
+
+asc_device::asc_device(running_machine &_machine, const asc_device_config &config)
+	: device_t(_machine, config),
+	  device_sound_interface(_machine, config, *this),
+	  m_config(config),
+	  m_chip_type(m_config.m_type)
+{
+}
+
+
+//-------------------------------------------------
+//  device_start - device-specific startup
+//-------------------------------------------------
+
+void asc_device::device_start()
+{
+	// create the stream
+	m_stream = stream_create(this, 0, 2, 22257, this, static_stream_generate);
+}
+
+
+//-------------------------------------------------
+//  device_reset - device-specific reset
+//-------------------------------------------------
+
+void asc_device::device_reset()
+{
+	stream_update(m_stream);
+}
+
+//-------------------------------------------------
+//  stream_generate - handle update requests for
+//  our sound stream
+//-------------------------------------------------
+
+STREAM_UPDATE( asc_device::static_stream_generate )
+{
+	reinterpret_cast<asc_device *>(param)->stream_generate(inputs, outputs, samples);
+}
+
+void asc_device::stream_generate(stream_sample_t **inputs, stream_sample_t **outputs, int samples)
+{
+	// reset the output stream
+	memset(outputs[0], 0, samples * sizeof(*outputs[0]));
+}
+
+//-------------------------------------------------
+//  read - read from the chip's registers and internal RAM
+//-------------------------------------------------
+
+UINT8 asc_device::read(UINT16 offset)
+{
+	if (offset < 0x400)
+	{
+		return fifo_a[offset];
+	}
+	else if (offset < 0x800)
+	{
+		return fifo_b[offset-0x400];
+	}
+	else
+	{
+		switch (offset)
+		{
+			case 0x800:	// VERSION
+				switch (m_chip_type)
+				{
+					case ASC_TYPE_ASC:
+						return 0;
+
+					case ASC_TYPE_V8:
+						return 0xe8;
+
+					case ASC_TYPE_SONORA:
+						return 0xbc;
+
+					default:
+						return 0;
+				}
+				break;
+
+			case 0x804:	// FIFO Interrupt Status
+				if (m_chip_type == ASC_TYPE_V8)
+				{
+					return 3;
+				}
+				break;
+
+			default:
+				break;
+		}
+	}
+
+	return regs[offset-0x800];
+}
+
+//-------------------------------------------------
+//  write - write to the chip's registers and internal RAM
+//-------------------------------------------------
+
+void asc_device::write(UINT16 offset, UINT8 data)
+{
+	if (offset < 0x400)
+	{
+		fifo_a[offset] = data;
+	}
+	else if (offset < 0x800)
+	{
+		fifo_b[offset-0x400] = data;
+	}
+	else
+	{
+		regs[offset-0x800] = data;
+	}
+}
+
+const device_type ASC = asc_device_config::static_alloc_device_config;
+

src/emu/sound/asc.h

@@ -0,0 +1,129 @@
+/***************************************************************************
+
+    asc.h
+
+    Apple Sound Chip (ASC) 344S0063
+    Enhanced Apple Sound Chip (EASC) 343S1063
+
+***************************************************************************/
+
+#pragma once
+
+#ifndef __ASC_H__
+#define __ASC_H__
+
+#include "streams.h"
+
+
+
+//**************************************************************************
+//  CONSTANTS
+//**************************************************************************
+
+// chip behavior types
+enum
+{
+	ASC_TYPE_ASC = 0,	// original discrete Apple Sound Chip
+	ASC_TYPE_EASC = 1,	// discrete Enhanced Apple Sound Chip
+	ASC_TYPE_V8 = 2,	// Subset of ASC included in the V8 ASIC (LC/LCII)
+	ASC_TYPE_EAGLE = 3,	// Subset of ASC included in the Eagle ASIC (Classic II)
+	ASC_TYPE_SPICE = 4,	// Subset of ASC included in the Spice ASIC (Color Classic)
+	ASC_TYPE_SONORA = 5,	// Subset of ASC included in the Sonora ASIC (LCIII)
+	ASC_TYPE_VASP = 6,	// Subset of ASC included in the VASP ASIC  (IIvx/IIvi)
+	ASC_TYPE_ARDBEG = 7	// Subset of ASC included in the Ardbeg ASIC (LC520)
+};
+
+
+
+//**************************************************************************
+//  INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MDRV_ASC_ADD(_tag, _clock, _type) \
+	MDRV_DEVICE_ADD(_tag, ASC, _clock) \
+	MDRV_ASC_TYPE(_type)
+
+#define MDRV_ASC_REPLACE(_tag, _clock, _type) \
+	MDRV_DEVICE_REPLACE(_tag, ASC, _clock) \
+	MDRV_ASC_TYPE(_type)
+
+#define MDRV_ASC_TYPE(_type) \
+	asc_device_config::static_set_type(device, _type); \
+
+
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> asc_device_config
+
+class asc_device_config :	public device_config, public device_config_sound_interface
+{
+	friend class asc_device;
+
+	// construction/destruction
+	asc_device_config(const machine_config &mconfig, const char *tag, const device_config *owner, UINT32 clock);
+
+public:
+	// allocators
+	static device_config *static_alloc_device_config(const machine_config &mconfig, const char *tag, const device_config *owner, UINT32 clock);
+	virtual device_t *alloc_device(running_machine &machine) const;
+
+	// inline configuration helpers
+	static void static_set_type(device_config *device, int type);
+
+protected:
+	// device_config overrides
+	virtual const address_space_config *memory_space_config(int spacenum = 0) const;
+
+	// internal state
+	const address_space_config  m_space_config;
+
+	// inline data
+	UINT8						m_type;
+};
+
+
+
+// ======================> asc_device
+
+class asc_device : public device_t, public device_sound_interface
+{
+	friend class asc_device_config;
+
+	// construction/destruction
+	asc_device(running_machine &_machine, const asc_device_config &config);
+
+public:
+	UINT8 read(UINT16 offset);
+	void write(UINT16 offset, UINT8 data);
+
+protected:
+	// device-level overrides
+	virtual void device_start();
+	virtual void device_reset();
+
+	// internal callbacks
+	static STREAM_UPDATE( static_stream_generate );
+	virtual void stream_generate(stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+
+	// internal state
+	const asc_device_config &m_config;
+
+	UINT8	m_chip_type;
+	sound_stream *m_stream;
+
+	UINT8	fifo_a[0x400];
+	UINT8	fifo_b[0x400];
+
+	UINT8	regs[0x100];
+};
+
+
+// device type definition
+extern const device_type ASC;
+
+
+#endif /* __ASC_H__ */
+

src/emu/sound/sound.mak

@@ -72,6 +72,15 @@ $(SOUNDOBJ)/discrete.o:	$(SOUNDSRC)/discrete.c \
 						$(SOUNDSRC)/disc_wav.c
 
 
+#-------------------------------------------------
+# Apple custom sound chips
+#-------------------------------------------------
+
+ifneq ($(filter ASC,$(SOUNDS)),)
+SOUNDOBJS += $(SOUNDOBJ)/asc.o
+endif
+
+
 
 #-------------------------------------------------
 # Atari custom sound chips

src/mame/mame.mak

@@ -224,6 +224,7 @@ SOUNDS += CDP1864
 SOUNDS += ZSG2
 SOUNDS += MOS656X
 SOUNDS += S2636
+#SOUNDS += ASC
 
 #-------------------------------------------------
 # this is the list of driver libraries that