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-rw-r--r--trunk/src/emu/sound/2413intf.c145
1 files changed, 145 insertions, 0 deletions
diff --git a/trunk/src/emu/sound/2413intf.c b/trunk/src/emu/sound/2413intf.c
new file mode 100644
index 00000000000..ab4c738a1dc
--- /dev/null
+++ b/trunk/src/emu/sound/2413intf.c
@@ -0,0 +1,145 @@
+/****************************************************************
+
+ MAME / MESS functions
+
+****************************************************************/
+
+#include "emu.h"
+#include "ym2413.h"
+#include "2413intf.h"
+
+
+/* for stream system */
+typedef struct _ym2413_state ym2413_state;
+struct _ym2413_state
+{
+ sound_stream * stream;
+ void * chip;
+};
+
+
+INLINE ym2413_state *get_safe_token(device_t *device)
+{
+ assert(device != NULL);
+ assert(device->type() == YM2413);
+ return (ym2413_state *)downcast<legacy_device_base *>(device)->token();
+}
+
+
+#ifdef UNUSED_FUNCTION
+void YM2413DAC_update(int chip,stream_sample_t **inputs, stream_sample_t **_buffer,int length)
+{
+ INT16 *buffer = _buffer[0];
+ static int out = 0;
+
+ if ( ym2413[chip].reg[0x0F] & 0x01 )
+ {
+ out = ((ym2413[chip].reg[0x10] & 0xF0) << 7);
+ }
+ while (length--) *(buffer++) = out;
+}
+#endif
+
+static STREAM_UPDATE( ym2413_stream_update )
+{
+ ym2413_state *info = (ym2413_state *)param;
+ ym2413_update_one(info->chip, outputs, samples);
+}
+
+static void _stream_update(void *param, int interval)
+{
+ ym2413_state *info = (ym2413_state *)param;
+ info->stream->update();
+}
+
+static DEVICE_START( ym2413 )
+{
+ ym2413_state *info = get_safe_token(device);
+ int rate = device->clock()/72;
+
+ /* emulator create */
+ info->chip = ym2413_init(device, device->clock(), rate);
+ assert_always(info->chip != NULL, "Error creating YM2413 chip");
+
+ /* stream system initialize */
+ info->stream = device->machine().sound().stream_alloc(*device,0,2,rate,info,ym2413_stream_update);
+
+ ym2413_set_update_handler(info->chip, _stream_update, info);
+
+
+
+
+#if 0
+ int i, tst;
+ char name[40];
+
+ num = intf->num;
+
+ tst = YM3812_sh_start (msound);
+ if (tst)
+ return 1;
+
+ for (i=0;i<num;i++)
+ {
+ ym2413_reset (i);
+
+ ym2413[i].DAC_stream = device->machine().sound().stream_alloc(*device, 0, 1, device->clock()/72, i, YM2413DAC_update);
+
+ if (ym2413[i].DAC_stream == -1)
+ return 1;
+ }
+ return 0;
+#endif
+
+}
+
+static DEVICE_STOP( ym2413 )
+{
+ ym2413_state *info = get_safe_token(device);
+ ym2413_shutdown(info->chip);
+}
+
+static DEVICE_RESET( ym2413 )
+{
+ ym2413_state *info = get_safe_token(device);
+ ym2413_reset_chip(info->chip);
+}
+
+
+WRITE8_DEVICE_HANDLER( ym2413_w )
+{
+ ym2413_state *info = get_safe_token(device);
+ ym2413_write(info->chip, offset & 1, data);
+}
+
+WRITE8_DEVICE_HANDLER( ym2413_register_port_w ) { ym2413_w(device, 0, data); }
+WRITE8_DEVICE_HANDLER( ym2413_data_port_w ) { ym2413_w(device, 1, data); }
+
+
+/**************************************************************************
+ * Generic get_info
+ **************************************************************************/
+
+DEVICE_GET_INFO( ym2413 )
+{
+ switch (state)
+ {
+ /* --- the following bits of info are returned as 64-bit signed integers --- */
+ case DEVINFO_INT_TOKEN_BYTES: info->i = sizeof(ym2413_state); break;
+
+ /* --- the following bits of info are returned as pointers to data or functions --- */
+ case DEVINFO_FCT_START: info->start = DEVICE_START_NAME( ym2413 ); break;
+ case DEVINFO_FCT_STOP: info->stop = DEVICE_STOP_NAME( ym2413 ); break;
+ case DEVINFO_FCT_RESET: info->reset = DEVICE_RESET_NAME( ym2413 ); break;
+
+ /* --- the following bits of info are returned as NULL-terminated strings --- */
+ case DEVINFO_STR_NAME: strcpy(info->s, "YM2413"); break;
+ case DEVINFO_STR_FAMILY: strcpy(info->s, "Yamaha FM"); break;
+ case DEVINFO_STR_VERSION: strcpy(info->s, "1.0"); break;
+ case DEVINFO_STR_SOURCE_FILE: strcpy(info->s, __FILE__); break;
+ case DEVINFO_STR_CREDITS: strcpy(info->s, "Copyright Nicola Salmoria and the MAME Team"); break;
+ }
+}
+
+
+DEFINE_LEGACY_SOUND_DEVICE(YM2413, ym2413);