add "AWACS" sound core from MESS (nw)

.gitattributes

@@ -1030,6 +1030,8 @@ 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/awacs.c svneol=native#text/plain
+src/emu/sound/awacs.h svneol=native#text/plain
 src/emu/sound/ay8910.c svneol=native#text/plain
 src/emu/sound/ay8910.h svneol=native#text/plain
 src/emu/sound/beep.c svneol=native#text/plain

src/emu/sound/awacs.c

@@ -0,0 +1,173 @@
+/***************************************************************************
+
+    awacs.c
+
+    AWACS/Singer style 16-bit audio I/O for '040 and PowerPC Macs
+
+    Emulation by R. Belmont
+ 
+***************************************************************************/
+
+#include "emu.h"
+#include "awacs.h"
+
+// device type definition
+const device_type AWACS = &device_creator<awacs_device>;
+
+//**************************************************************************
+//  LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+//  awacs_device - constructor
+//-------------------------------------------------
+
+awacs_device::awacs_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+	: device_t(mconfig, AWACS, "AWACS", tag, owner, clock),
+	  device_sound_interface(mconfig, *this)
+{
+}
+
+//-------------------------------------------------
+//  device_start - device-specific startup
+//-------------------------------------------------
+
+void awacs_device::device_start()
+{
+	// create the stream
+	m_stream = machine().sound().stream_alloc(*this, 0, 2, 22050, this);
+
+	memset(m_regs, 0, sizeof(m_regs));
+
+	m_timer = timer_alloc(0, NULL);
+
+	save_item(NAME(m_play_ptr));
+	save_item(NAME(m_buffer_size));
+	save_item(NAME(m_playback_enable));
+}
+
+
+//-------------------------------------------------
+//  device_reset - device-specific reset
+//-------------------------------------------------
+
+void awacs_device::device_reset()
+{
+	m_stream->update();
+
+	memset(m_regs, 0, sizeof(m_regs));
+
+    m_play_ptr = 0;
+    m_buffer_size = 0;
+    m_playback_enable = false;
+    m_dma_space = NULL;
+    m_dma_offset_0 = m_dma_offset_1 = 0;
+    m_buffer_num = 0;
+}
+
+//-------------------------------------------------
+//  device_timer - called when our device timer expires
+//-------------------------------------------------
+
+void awacs_device::device_timer(emu_timer &timer, device_timer_id tid, int param, void *ptr)
+{
+	m_stream->update();
+}
+
+//-------------------------------------------------
+//  sound_stream_update - handle update requests for
+//  our sound stream
+//-------------------------------------------------
+
+void awacs_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples)
+{
+	stream_sample_t *outL, *outR;
+    int offset = (m_buffer_num == 0) ? m_dma_offset_0 : m_dma_offset_1;
+
+	outL = outputs[0];
+	outR = outputs[1];
+
+    if (m_playback_enable)
+    {
+        for (int i = 0; i < samples; i++)
+        {
+            outL[i] = (INT16)m_dma_space->read_word(offset + m_play_ptr);
+            outR[i] = (INT16)m_dma_space->read_word(offset + m_play_ptr + 2);
+            m_play_ptr += 4;
+        }
+
+        // out of buffer?
+        if (m_play_ptr >= m_buffer_size)
+        {
+            UINT8 bufflag[2] = { 0x40, 0x80 };
+
+            m_regs[0x18] |= bufflag[m_buffer_num];
+            m_buffer_num ^= 1;
+            m_play_ptr = 0;
+        }
+    }
+    else
+    {
+        for (int i = 0; i < samples; i++)
+        {
+            outL[i] = 0;
+            outR[i] = 0;
+        }
+    }
+}
+
+//-------------------------------------------------
+//  read - read from the chip's registers and internal RAM
+//-------------------------------------------------
+
+READ8_MEMBER( awacs_device::read )
+{
+    return m_regs[offset];
+}
+
+//-------------------------------------------------
+//  write - write to the chip's registers and internal RAM
+//-------------------------------------------------
+
+WRITE8_MEMBER( awacs_device::write )
+{
+    switch (offset)
+    {
+        case 0x8:
+        case 0x9:
+            m_regs[offset] = data;
+            m_buffer_size = (m_regs[8]<<6) | (m_regs[9]>>2);
+//            printf("buffer size = %x samples, %x bytes\n", m_buffer_size, m_buffer_size*4);
+            m_buffer_size *= 4; // samples * 16 bits * stereo
+            break;
+
+        case 0x10:
+            static const int rates[4] = { 22100, 29400, 44100, 22100 };
+            m_stream->set_sample_rate(rates[(data>>1)&3]);
+//            printf("rate %d, enable: %d\n", rates[(data>>1)&3], data & 1);
+            m_playback_enable = (data & 1) ? true : false;
+
+            if (m_playback_enable && !(m_regs[0x10]&1))
+            {
+                m_play_ptr = 0;
+                m_buffer_num = 0;
+            }
+            break;
+
+        case 0x18:
+            m_regs[offset] &= 0xf0;
+            m_regs[offset] |= (data & 0x0f);
+            m_regs[offset] &= ~(data & 0xf0);
+            return;
+    }
+
+    m_regs[offset] = data;
+}
+
+void awacs_device::set_dma_base(address_space *space, int offset0, int offset1)
+{
+    m_dma_space = space;
+    m_dma_offset_0 = offset0;
+    m_dma_offset_1 = offset1;
+}
+

src/emu/sound/awacs.h

@@ -0,0 +1,76 @@
+/***************************************************************************
+
+    awacs.h
+
+    AWACS/Singer style 16-bit audio I/O for '040 and PowerPC Macs
+
+***************************************************************************/
+
+#pragma once
+
+#ifndef __AWACS_H__
+#define __AWACS_H__
+
+
+
+
+//**************************************************************************
+//  CONSTANTS
+//**************************************************************************
+
+//**************************************************************************
+//  INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_AWACS_ADD(_tag, _clock) \
+	MCFG_DEVICE_ADD(_tag, AWACS, _clock)
+
+#define MCFG_AWACS_REPLACE(_tag, _clock) \
+	MCFG_DEVICE_REPLACE(_tag, AWACS, _clock)
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> awacs_device
+
+class awacs_device : public device_t, public device_sound_interface
+{
+public:
+	// construction/destruction
+	awacs_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+	DECLARE_READ8_MEMBER(read);
+	DECLARE_WRITE8_MEMBER(write);
+
+    void set_dma_base(address_space *space, int offset0, int offset1);
+
+	sound_stream *m_stream;
+
+protected:
+	// device-level overrides
+	virtual void device_start();
+	virtual void device_reset();
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+
+	virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
+
+	// inline data
+	UINT8 m_regs[0x100];
+
+    int m_play_ptr, m_buffer_size, m_buffer_num;
+    bool m_playback_enable;
+
+    address_space *m_dma_space;
+    int m_dma_offset_0, m_dma_offset_1;
+
+    emu_timer *m_timer;
+};
+
+
+// device type definition
+extern const device_type AWACS;
+
+
+#endif /* __AWACS_H__ */
+

src/emu/sound/sound.mak

@@ -80,6 +80,9 @@ ifneq ($(filter ASC,$(SOUNDS)),)
 SOUNDOBJS += $(SOUNDOBJ)/asc.o
 endif
 
+ifneq ($(filter AWACS,$(SOUNDS)),)
+SOUNDOBJS += $(SOUNDOBJ)/awacs.o
+endif
 
 
 #-------------------------------------------------

src/mame/mame.mak

@@ -230,6 +230,7 @@ SOUNDS += S2636
 SOUNDS += ASC
 SOUNDS += MAS3507D
 SOUNDS += LMC1992
+SOUNDS += AWACS
 
 
 #-------------------------------------------------