dev145 - Namco WSG: new noise strategy for C30

src/engine/engine.h

@@ -47,8 +47,8 @@
 #define BUSY_BEGIN_SOFT softLocked=true; isBusy.lock();
 #define BUSY_END isBusy.unlock(); softLocked=false;
 
-#define DIV_VERSION "0.6pre4-hotfix"
-#define DIV_ENGINE_VERSION 144
+#define DIV_VERSION "dev145"
+#define DIV_ENGINE_VERSION 145
 // for imports
 #define DIV_VERSION_MOD 0xff01
 #define DIV_VERSION_FC 0xff02

src/engine/fileOps.cpp

@@ -2678,6 +2678,15 @@ bool DivEngine::loadFur(unsigned char* file, size_t len) {
       }
     }
 
+    // Namco C30 noise compat
+    if (ds.version<145) {
+      for (int i=0; i<ds.systemLen; i++) {
+        if (ds.system[i]==DIV_SYSTEM_NAMCO_CUS30) {
+          ds.systemFlags[i].set("newNoise",false);
+        }
+      }
+    }
+
     if (active) quitDispatch();
     BUSY_BEGIN_SOFT;
     saveLock.lock();

src/engine/platform/namcowsg.cpp

@@ -316,9 +316,16 @@ void DivPlatformNamcoWSG::tick(bool sysTick) {
           rWrite((i<<3)+0x100,0);
           rWrite((i<<3)+0x104,(chan[(i+1)&7].noise?0x80:0));
         }
-        rWrite((i<<3)+0x103,chan[i].freq&0xff);
-        rWrite((i<<3)+0x102,(chan[i].freq>>8)&0xff);
-        rWrite((i<<3)+0x101,((chan[i].freq>>16)&15)|(i<<4));
+        if (chan[i].noise && newNoise) {
+          int noiseFreq=chan[i].freq>>9;
+          if (noiseFreq<0) noiseFreq=0;
+          if (noiseFreq>255) noiseFreq=255;
+          rWrite((i<<3)+0x103,noiseFreq);
+        } else {
+          rWrite((i<<3)+0x103,chan[i].freq&0xff);
+          rWrite((i<<3)+0x102,(chan[i].freq>>8)&0xff);
+          rWrite((i<<3)+0x101,((chan[i].freq>>16)&15)|(i<<4));
+        }
       }
       break;
   }
@@ -544,6 +551,7 @@ void DivPlatformNamcoWSG::setFlags(const DivConfig& flags) {
   for (int i=0; i<chans; i++) {
     oscBuf[i]->rate=rate;
   }
+  newNoise=flags.getBool("newNoise",true);
 }
 
 void DivPlatformNamcoWSG::poke(unsigned int addr, unsigned short val) {

src/engine/platform/namcowsg.h

@@ -49,6 +49,7 @@ class DivPlatformNamcoWSG: public DivDispatch {
 
   namco_audio_device* namco;
   int devType, chans;
+  bool newNoise;
   unsigned char regPool[512];
   void updateWave(int ch);
   friend void putDispatchChip(void*,int);