1 files changed, 97 insertions, 0 deletions
diff --git a/plugins/dfsound/dma.c b/plugins/dfsound/dma.c
new file mode 100644
index 0000000..f92d066
--- /dev/null
+++ b/plugins/dfsound/dma.c
@@ -0,0 +1,97 @@
+/***************************************************************************
+                            dma.c  -  description
+                             -------------------
+    begin                : Wed May 15 2002
+    copyright            : (C) 2002 by Pete Bernert
+    email                : BlackDove@addcom.de
+ ***************************************************************************/
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version. See also the license.txt file for *
+ *   additional informations.                                              *
+ *                                                                         *
+ ***************************************************************************/
+
+#include "stdafx.h"
+
+#define _IN_DMA
+
+#include "externals.h"
+
+////////////////////////////////////////////////////////////////////////
+// READ DMA (one value)
+////////////////////////////////////////////////////////////////////////
+
+unsigned short CALLBACK SPUreadDMA(void)
+{
+ unsigned short s=spuMem[spuAddr>>1];
+ spuAddr+=2;
+ if(spuAddr>0x7ffff) spuAddr=0;
+
+ iSpuAsyncWait=0;
+
+ return s;
+}
+
+////////////////////////////////////////////////////////////////////////
+// READ DMA (many values)
+////////////////////////////////////////////////////////////////////////
+
+void CALLBACK SPUreadDMAMem(unsigned short * pusPSXMem,int iSize)
+{
+ int i;
+
+ for(i=0;i<iSize;i++)
+  {
+   *pusPSXMem++=spuMem[spuAddr>>1];                    // spu addr got by writeregister
+   spuAddr+=2;                                         // inc spu addr
+   if(spuAddr>0x7ffff) spuAddr=0;                      // wrap
+  }
+
+ iSpuAsyncWait=0;
+}
+
+////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////
+
+// to investigate: do sound data updates by writedma affect spu
+// irqs? Will an irq be triggered, if new data is written to
+// the memory irq address?
+
+////////////////////////////////////////////////////////////////////////
+// WRITE DMA (one value)
+////////////////////////////////////////////////////////////////////////
+  
+void CALLBACK SPUwriteDMA(unsigned short val)
+{
+ spuMem[spuAddr>>1] = val;                             // spu addr got by writeregister
+
+ spuAddr+=2;                                           // inc spu addr
+ if(spuAddr>0x7ffff) spuAddr=0;                        // wrap
+
+ iSpuAsyncWait=0;
+}
+
+////////////////////////////////////////////////////////////////////////
+// WRITE DMA (many values)
+////////////////////////////////////////////////////////////////////////
+
+void CALLBACK SPUwriteDMAMem(unsigned short * pusPSXMem,int iSize)
+{
+ int i;
+
+ for(i=0;i<iSize;i++)
+  {
+   spuMem[spuAddr>>1] = *pusPSXMem++;                  // spu addr got by writeregister
+   spuAddr+=2;                                         // inc spu addr
+   if(spuAddr>0x7ffff) spuAddr=0;                      // wrap
+  }
+ 
+ iSpuAsyncWait=0;
+}
+
+////////////////////////////////////////////////////////////////////////