add envelope channel to OPN SSG + rel. noise & stereo

extern/SDL

@@ -1 +1 @@
-Subproject commit 6371fd44c8a3cdfb3166b36d4798f5daeca2eeee
+Subproject commit 2359383fc187386204c3bb22de89655a494cd128

src/engine/dispatchContainer.cpp

@@ -449,6 +449,16 @@ void DivDispatchContainer::init(DivSystem sys, DivEngine* eng, int chanCount, do
       }
       ((DivPlatformYM2203Ext*)dispatch)->setCSM(1);
       break;
+    case DIV_SYSTEM_YM2203_CSM_ENV:
+      dispatch = new DivPlatformYM2203Ext;
+      if (isRender) {
+        ((DivPlatformYM2203Ext*)dispatch)->setCombo(eng->getConfInt("opn1CoreRender", 1));
+      }
+      else {
+        ((DivPlatformYM2203Ext*)dispatch)->setCombo(eng->getConfInt("opn1Core", 1));
+      }
+      ((DivPlatformYM2203Ext*)dispatch)->setCSM(1);
+      break;
     case DIV_SYSTEM_YM2608:
       dispatch=new DivPlatformYM2608;
       if (isRender) {

src/engine/platform/ay.cpp

@@ -339,8 +339,8 @@ void DivPlatformAY8910::acquire_mame(blip_buffer_t** bb, size_t len) {
       oscBuf[2]->putSample(i,CLAMP(sunsoftVolTable[31-((ay->lastIndx>>10)&31)]<<3,-32768,32767));
     } else {
       if (stereo) {
-        int out0=ayBuf[0]+ayBuf[1]+((ayBuf[2]*stereoSep)>>8);
+        int out0=ayBuf[0]+((ayBuf[1]*centerVol+ayBuf[2]*sideVol)>>8);
-        int out1=((ayBuf[0]*stereoSep)>>8)+ayBuf[1]+ayBuf[2];
+        int out1=((ayBuf[0]*sideVol+ayBuf[1]*centerVol)>>8)+ayBuf[2];
         if (lastOut[0]!=out0) {
           blip_add_delta(bb[0],i,out0-lastOut[0]);
           lastOut[0]=out0;
@@ -388,8 +388,8 @@ void DivPlatformAY8910::acquire_atomic(short** buf, size_t len) {
     SSG_Clock(&ay_atomic,1);
 
     if (stereo) {
-      buf[0][i]=ay_atomic.o_analog[0]+ay_atomic.o_analog[1]+((ay_atomic.o_analog[2]*stereoSep)>>8);
+      buf[0][i]=ay_atomic.o_analog[0]+((ay_atomic.o_analog[1]*centerVol+ay_atomic.o_analog[2]*sideVol)>>8);
-      buf[1][i]=((ay_atomic.o_analog[0]*stereoSep)>>8)+ay_atomic.o_analog[1]+ay_atomic.o_analog[2];
+      buf[1][i]=((ay_atomic.o_analog[0]*sideVol+ay_atomic.o_analog[1]*centerVol)>>8)+ay_atomic.o_analog[2];
     } else {
       buf[0][i]=ay_atomic.o_analog[0]+ay_atomic.o_analog[1]+ay_atomic.o_analog[2];
       buf[1][i]=buf[0][i];
@@ -453,6 +453,7 @@ void DivPlatformAY8910::updateOutSel(bool immediate) {
 }
 
 void DivPlatformAY8910::tick(bool sysTick) {
+  signed char noiseAdd=-1;
   // PSG
   for (int i=0; i<3; i++) {
     chan[i].std.next();
@@ -478,7 +479,13 @@ void DivPlatformAY8910::tick(bool sysTick) {
       chan[i].freqChanged=true;
     }
     if (chan[i].std.duty.had) {
-      rWrite(0x06,31-chan[i].std.duty.val);
+      if (chan[i].std.duty.mode) {
+        noiseAdd=chan[i].std.duty.val;
+      }
+      else {
+        ayNoisePeriod=chan[i].std.duty.val;
+        noiseAdd=0;
+      }
     }
     if (chan[i].std.wave.had) {
       if (!(chan[i].nextPSGMode.val&8)) {
@@ -547,10 +554,8 @@ void DivPlatformAY8910::tick(bool sysTick) {
       chan[i].fixedFreq=chan[i].std.ex4.val;
       chan[i].freqChanged=true;
     }
-    if (chan[i].std.ex5.had) {
+    if (chan[i].std.ex5.had && (!chan[3].active && extendedSsg)) {
-      ayEnvPeriod=chan[i].std.ex5.val;
+      ayEnvPeriod=chan[i].std.ex5.val<<8;
-      immWrite(0x0b,ayEnvPeriod);
-      immWrite(0x0c,ayEnvPeriod>>8);
     }
     if (chan[i].std.ex6.had) {
       // 0 - disable timer
@@ -627,6 +632,9 @@ void DivPlatformAY8910::tick(bool sysTick) {
         rWrite((i)<<1,chan[i].freq&0xff);
         rWrite(1+((i)<<1),chan[i].freq>>8);
       }
+      if (chan[i].freqChanged && chan[i].autoEnvNum>0 && chan[i].autoEnvDen>0 && (!chan[3].active && extendedSsg)) {
+        ayEnvPeriod=(chan[i].freq*chan[i].autoEnvDen/chan[i].autoEnvNum)<<4;
+      }
       if (chan[i].keyOn) chan[i].keyOn=false;
       if (chan[i].keyOff) chan[i].keyOff=false;
       if (chan[i].freqChanged && chan[i].autoEnvNum>0 && chan[i].autoEnvDen>0) {
@@ -638,6 +646,48 @@ void DivPlatformAY8910::tick(bool sysTick) {
     }
   }
 
+  // Envelope
+  chan[3].std.next();
+  if (NEW_ARP_STRAT) {
+    chan[3].handleArp();
+  } else if (chan[3].std.arp.had) {
+    if (!chan[3].inPorta) {
+      int note=parent->calcArp(chan[3].note,chan[3].std.arp.val);
+      chan[3].baseFreq=round(parent->calcBaseFreq(chipClock*16,CHIP_DIVIDER,note,true));
+    }
+    chan[3].freqChanged=true;
+  }
+  if (chan[3].std.pitch.had) {
+    if (chan[3].std.pitch.mode) {
+      chan[3].pitch2+=chan[3].std.pitch.val;
+      CLAMP_VAR(chan[3].pitch2,-32768,32767);
+    } else {
+      chan[3].pitch2=chan[3].std.pitch.val;
+    }
+    chan[3].freqChanged=true;
+  }
+  if (chan[3].std.ex2.had) {
+    ayEnvMode=chan[3].std.ex2.val;
+    rWrite(0x0d,ayEnvMode);
+  }
+  if (chan[3].std.ex5.had && chan[3].active) {
+    ayEnvPeriod=chan[3].std.ex5.val<<8;
+  }
+  else if ((chan[3].freqChanged && chan[3].active) || chan[3].keyOn) {
+    chan[3].freq=parent->calcFreq(chan[3].baseFreq,chan[3].pitch,chan[3].fixedArp?chan[3].baseNoteOverride:chan[3].arpOff,chan[3].fixedArp,true,0,chan[3].pitch2,chipClock*16,CHIP_DIVIDER);
+    if (chan[3].freq<0) chan[3].freq=0;
+    if (chan[3].freq>65535*256) chan[3].freq=65535*256;
+    ayEnvPeriod=chan[3].freq;
+    chan[3].freqChanged=false;
+  }
+  if (chan[3].keyOn) chan[3].keyOn=false;
+  if (chan[3].keyOff) chan[3].keyOff=false;
+
+  if (noiseAdd>=0) {
+    ayNoisePeriod=(ayNoisePeriod+noiseAdd)&31;
+    rWrite(0x06,31-ayNoisePeriod);
+  }
+
   updateOutSel();
 
   if (ayEnvSlide!=0) {
@@ -660,6 +710,13 @@ void DivPlatformAY8910::tick(bool sysTick) {
     }
   }
 
+  unsigned int newPeriod=ayEnvPeriod>>8;
+  if (newPeriod!=ayOldEnvPeriod) {
+    immWrite(0x0b,newPeriod&0xff);
+    immWrite(0x0c,newPeriod>>8);
+    ayOldEnvPeriod=newPeriod;
+  }
+  
   for (int i=0; i<16; i++) {
     if (pendingWrites[i]!=oldWrites[i]) {
       immWrite(i,pendingWrites[i]&0xff);
@@ -760,7 +817,7 @@ int DivPlatformAY8910::dispatch(DivCommand c) {
       if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
         chan[c.chan].outVol=chan[c.chan].vol;
       }
-      if (!(chan[c.chan].nextPSGMode.val&8)) {
+      if (c.chan<3 && !(chan[c.chan].nextPSGMode.val&8)) {
         if (isMuted[c.chan]) {
           rWrite(0x08+c.chan,0);
         } else if (intellivision && (chan[c.chan].nextPSGMode.getEnvelope())) {
@@ -788,7 +845,7 @@ int DivPlatformAY8910::dispatch(DivCommand c) {
       if (!chan[c.chan].std.vol.has) {
         chan[c.chan].outVol=c.value;
       }
-      if (!(chan[c.chan].nextPSGMode.val&8)) {
+      if (c.chan<3 && !(chan[c.chan].nextPSGMode.val&8)) {
         if (isMuted[c.chan]) {
           rWrite(0x08+c.chan,0);
         } else {
@@ -856,20 +913,23 @@ int DivPlatformAY8910::dispatch(DivCommand c) {
           if (chan[c.chan].active) {
             chan[c.chan].curPSGMode.val=chan[c.chan].nextPSGMode.val;
           }
-          if (isMuted[c.chan]) {
+          if (c.chan<3) {
-            rWrite(0x08+c.chan,0);
+            if (isMuted[c.chan]) {
-          } else if (chan[c.chan].active) {
+              rWrite(0x08+c.chan,0);
-            if (intellivision && (chan[c.chan].nextPSGMode.getEnvelope())) {
+            } else if (chan[c.chan].active) {
-              rWrite(0x08+c.chan,(chan[c.chan].outVol&0xc)<<2);
+              if (intellivision && (chan[c.chan].nextPSGMode.getEnvelope())) {
-            } else {
+                rWrite(0x08+c.chan,(chan[c.chan].outVol&0xc)<<2);
-              rWrite(0x08+c.chan,(chan[c.chan].outVol&15)|((chan[c.chan].nextPSGMode.getEnvelope())<<2));
+              } else {
+                rWrite(0x08+c.chan,(chan[c.chan].outVol&15)|((chan[c.chan].nextPSGMode.getEnvelope())<<2));
+              }
             }
           }
         }
       }
       break;
     case DIV_CMD_STD_NOISE_FREQ:
-      rWrite(0x06,31-c.value);
+      ayNoisePeriod=c.value;
+      rWrite(0x06,31-ayNoisePeriod);
       break;
     case DIV_CMD_AY_ENVELOPE_SET:
       ayEnvMode=c.value>>4;
@@ -891,16 +951,18 @@ int DivPlatformAY8910::dispatch(DivCommand c) {
       }
       break;
     case DIV_CMD_AY_ENVELOPE_LOW:
-      ayEnvPeriod&=0xff00;
+      ayEnvPeriod&=0xff0000;
-      ayEnvPeriod|=c.value;
+      ayEnvPeriod|=c.value<<8;
-      immWrite(0x0b,ayEnvPeriod);
+      ayOldEnvPeriod=ayEnvPeriod>>8;
-      immWrite(0x0c,ayEnvPeriod>>8);
+      immWrite(0x0b,ayOldEnvPeriod&0xff);
+      immWrite(0x0c,ayOldEnvPeriod>>8);
       break;
     case DIV_CMD_AY_ENVELOPE_HIGH:
-      ayEnvPeriod&=0xff;
+      ayEnvPeriod&=0xff00;
-      ayEnvPeriod|=c.value<<8;
+      ayEnvPeriod|=c.value<<16;
-      immWrite(0x0b,ayEnvPeriod);
+      ayOldEnvPeriod=ayEnvPeriod>>8;
-      immWrite(0x0c,ayEnvPeriod>>8);
+      immWrite(0x0b,ayOldEnvPeriod&0xff);
+      immWrite(0x0c,ayOldEnvPeriod>>8);
       break;
     case DIV_CMD_AY_ENVELOPE_SLIDE:
       ayEnvSlide=c.value;
@@ -985,6 +1047,7 @@ int DivPlatformAY8910::dispatch(DivCommand c) {
 }
 
 void DivPlatformAY8910::muteChannel(int ch, bool mute) {
+  if (ch>=3) return;
   isMuted[ch]=mute;
   if (isMuted[ch]) {
     rWrite(0x08+ch,0);
@@ -1000,14 +1063,15 @@ void DivPlatformAY8910::muteChannel(int ch, bool mute) {
 }
 
 void DivPlatformAY8910::forceIns() {
-  for (int i=0; i<3; i++) {
+  for (int i=0; i<4; i++) {
     chan[i].curPSGMode.val&=~8;
     chan[i].nextPSGMode.val&=~8;
     chan[i].insChanged=true;
     chan[i].freqChanged=true;
   }
-  immWrite(0x0b,ayEnvPeriod);
+  ayOldEnvPeriod=ayEnvPeriod>>8;
-  immWrite(0x0c,ayEnvPeriod>>8);
+  immWrite(0x0b,ayOldEnvPeriod&0xff);
+  immWrite(0x0c,ayOldEnvPeriod>>8);
   immWrite(0x0d,ayEnvMode);
 }
 
@@ -1029,7 +1093,7 @@ DivSamplePos DivPlatformAY8910::getSamplePos(int ch) {
 }
 
 DivDispatchOscBuffer* DivPlatformAY8910::getOscBuffer(int ch) {
-  return oscBuf[ch];
+  return (ch<3)?oscBuf[ch]:NULL;
 }
 
 int DivPlatformAY8910::mapVelocity(int ch, float vel) {
@@ -1061,7 +1125,7 @@ void DivPlatformAY8910::reset() {
   while (!writes.empty()) writes.pop();
   ay->device_reset();
   memset(regPool,0,16);
-  for (int i=0; i<3; i++) {
+  for (int i=0; i<4; i++) {
     chan[i]=DivPlatformAY8910::Channel();
     chan[i].std.setEngine(parent);
     chan[i].vol=0x0f;
@@ -1082,7 +1146,9 @@ void DivPlatformAY8910::reset() {
   }
 
   sampleBank=0;
+  ayNoisePeriod=0;
   ayEnvPeriod=0;
+  ayOldEnvPeriod=0;
   ayEnvMode=0;
   ayEnvSlide=0;
   ayEnvSlideLow=0;
@@ -1114,7 +1180,7 @@ bool DivPlatformAY8910::getLegacyAlwaysSetVolume() {
 }
 
 void DivPlatformAY8910::notifyInsDeletion(void* ins) {
-  for (int i=0; i<3; i++) {
+  for (int i=0; i<4; i++) {
     chan[i].std.notifyInsDeletion((DivInstrument*)ins);
   }
 }
@@ -1250,6 +1316,21 @@ void DivPlatformAY8910::setFlags(const DivConfig& flags) {
 
   stereo=flags.getBool("stereo",false);
   stereoSep=flags.getInt("stereoSep",0)&255;
+  extendedSsg=false;
+  switch (flags.getInt("panLaw",0)) {
+    case 1:
+      centerVol=sqrtf((stereoSep+256)/512.f)*256.f;
+      sideVol=sqrtf(stereoSep/256.f)*256.f;
+      break;
+    case 2:
+      centerVol=(stereoSep+256)/2;
+      sideVol=stereoSep;
+      break;
+    default:
+      centerVol=256;
+      sideVol=stereoSep;
+      break;
+  }
 }
 
 int DivPlatformAY8910::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
@@ -1263,7 +1344,11 @@ int DivPlatformAY8910::init(DivEngine* p, int channels, int sugRate, const DivCo
   ay=NULL;
   setFlags(flags);
   reset();
-  return 3;
+  return extendedSsg?4:3;
+}
+
+void DivPlatformAY8910::setExtended(bool extended) {
+  extendedSsg=extended;
 }
 
 void DivPlatformAY8910::quit() {

src/engine/platform/ay.h

@@ -106,7 +106,7 @@ class DivPlatformAY8910: public DivDispatch {
         konCycles(0),
         fixedFreq(0) {}
     };
-    Channel chan[3];
+    Channel chan[4];
     bool isMuted[3];
     struct QueuedWrite {
       unsigned short addr;
@@ -123,6 +123,8 @@ class DivPlatformAY8910: public DivDispatch {
   
     unsigned char sampleBank;
     unsigned char stereoSep;
+    unsigned short sideVol;
+    unsigned short centerVol;
     unsigned char selCore;
 
     ssg_t ay_atomic;
@@ -130,6 +132,8 @@ class DivPlatformAY8910: public DivDispatch {
     int delay;
     int lastOut[2];
 
+    bool extendedSsg;
+
     bool extMode;
     unsigned int extClock;
     int dacRate;
@@ -142,7 +146,9 @@ class DivPlatformAY8910: public DivDispatch {
   
     short oldWrites[16];
     short pendingWrites[16];
+    unsigned char ayNoisePeriod;
     unsigned char ayEnvMode;
+    unsigned short ayOldEnvPeriod;
     unsigned short ayEnvPeriod;
     short ayEnvSlideLow;
     short ayEnvSlide;
@@ -189,6 +195,7 @@ class DivPlatformAY8910: public DivDispatch {
     void poke(std::vector<DivRegWrite>& wlist);
     const char** getRegisterSheet();
     int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags);
+    void setExtended(bool extended);
     void quit();
     DivPlatformAY8910(bool useExtMode=false, unsigned int eclk=COLOR_NTSC, unsigned char ediv=8, unsigned char ddiv=24):
       DivDispatch(),

src/engine/platform/ym2203.cpp

@@ -167,6 +167,7 @@ void DivPlatformYM2203::acquire(short** buf, size_t len) {
 
 void DivPlatformYM2203::acquire_combo(short** buf, size_t len) {
   thread_local int os;
+  thread_local int os1, os2;
   thread_local short ignored[2];
 
   for (int i=0; i<7; i++) {
@@ -233,11 +234,23 @@ void DivPlatformYM2203::acquire_combo(short** buf, size_t len) {
     // ymfm part
     fm->generate(&fmout);
 
-    os+=((fmout.data[1]+fmout.data[2]+fmout.data[3])*ssgVol)>>8;
+    if (stereo) {
-    if (os<-32768) os=-32768;
+      // so ugly
-    if (os>32767) os=32767;
+      os1=((fmout.data[1]+((fmout.data[2]*centerVol+fmout.data[3]*sideVol)>>8))*ssgVol)>>8;
-  
+      os2=((((fmout.data[1]*sideVol+fmout.data[2]*centerVol)>>8)+fmout.data[3])*ssgVol)>>8;
-    buf[0][h]=os;
+      if (os1<-32768) os1=-32768;
+      if (os1>32767) os1=32767;
+      if (os2<-32768) os2=-32768;
+      if (os2>32767) os2=32767;
+      buf[0][h]=os+os1;
+      buf[1][h]=os+os2;
+    } else {
+      os+=((fmout.data[1]+fmout.data[2]+fmout.data[3])*ssgVol)>>8;
+      if (os<-32768) os=-32768;
+      if (os>32767) os=32767;
+      buf[0][h]=os;
+      if (extendedSSG) buf[1][h]=os;
+    }
     
     for (int i=0; i<3; i++) {
       oscBuf[i]->putSample(h,CLAMP(fm_nuked.ch_out[i]<<1,-32768,32767));
@@ -1241,7 +1254,7 @@ DivMacroInt* DivPlatformYM2203::getChanMacroInt(int ch) {
 }
 
 DivDispatchOscBuffer* DivPlatformYM2203::getOscBuffer(int ch) {
-  return oscBuf[ch];
+  return (ch<(3+2+4+isCSM))?oscBuf[ch]:NULL;
 }
 
 unsigned char* DivPlatformYM2203::getRegisterPool() {
@@ -1344,7 +1357,7 @@ void DivPlatformYM2203::reset() {
 }
 
 int DivPlatformYM2203::getOutputCount() {
-  return 1;
+  return extendedSSG?2:1;
 }
 
 bool DivPlatformYM2203::keyOffAffectsArp(int ch) {
@@ -1423,6 +1436,25 @@ void DivPlatformYM2203::setFlags(const DivConfig& flags) {
   fbAllOps=flags.getBool("fbAllOps",false);
   ssgVol=flags.getInt("ssgVol",128);
   fmVol=flags.getInt("fmVol",256);
+  stereo=flags.getBool("stereo",false);
+  stereoSep=flags.getInt("stereoSep",0)&255;
+  switch (flags.getInt("panLaw",0)) {
+    case 1:
+      centerVol=sqrtf((stereoSep+256)/512.f)*256.f;
+      sideVol=sqrtf(stereoSep/256.f)*256.f;
+      break;
+    case 2:
+      centerVol=(stereoSep+256)/2;
+      sideVol=stereoSep;
+      break;
+    default:
+      centerVol=256;
+      sideVol=stereoSep;
+      break;
+  }
+  ayFlags.set("stereo",stereo);
+  ayFlags.set("stereoSep",stereoSep);
+  ayFlags.set("panLaw",flags.getInt("panLaw",0));
   if (useCombo==2) {
     rate=chipClock/(fmDivBase*2);
   } else {
@@ -1451,7 +1483,7 @@ int DivPlatformYM2203::init(DivEngine* p, int channels, int sugRate, const DivCo
   // YM2149, 2MHz
   ay=new DivPlatformAY8910(true,chipClock,ayDiv);
   ay->setCore(0);
-  ay->init(p,3,sugRate,ayFlags);
+  ay->init(p,extendedSSG?4:3,sugRate,ayFlags);
   ay->toggleRegisterDump(true);
   setFlags(flags);
 

src/engine/platform/ym2203.h

@@ -55,6 +55,11 @@ class DivPlatformYM2203: public DivPlatformOPN {
     bool lastS;
   
     DivPlatformAY8910* ay;
+    bool extendedSSG;
+    bool stereo;
+    unsigned char stereoSep;
+    unsigned short sideVol;
+    unsigned short centerVol;
     unsigned char sampleBank;
 
     bool extMode, noExtMacros;

src/engine/platform/ym2203ext.cpp

@@ -739,6 +739,7 @@ DivMacroInt* DivPlatformYM2203Ext::getChanMacroInt(int ch) {
 }
 
 DivDispatchOscBuffer* DivPlatformYM2203Ext::getOscBuffer(int ch) {
+  if (ch>9) return NULL;
   if (ch>=6) return oscBuf[ch-3];
   if (ch<3) return oscBuf[ch];
   return NULL;
@@ -791,7 +792,7 @@ int DivPlatformYM2203Ext::init(DivEngine* parent, int channels, int sugRate, con
     isOpMuted[i]=false;
   }
   extSys=true;
-
+  if (extendedSSG) ay->setExtended(1);
   reset();
   return 3+2+4+isCSM; // 3xPSG + 2xFM + 4xOP + optional CSM
 }
@@ -809,5 +810,9 @@ void DivPlatformYM2203Ext::setCSM(bool isCSM) {
   }
 }
 
+void DivPlatformYM2203Ext::setExtSSG(bool isExtended) {
+  extendedSSG=isExtended;
+}
+
 DivPlatformYM2203Ext::~DivPlatformYM2203Ext() {
 }

src/engine/platform/ym2203ext.h

@@ -45,6 +45,7 @@ class DivPlatformYM2203Ext: public DivPlatformYM2203 {
     int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags);
     void quit();
     void setCSM(bool isCSM);
+    void setExtSSG(bool isExtended);
     ~DivPlatformYM2203Ext();
 };
 

src/engine/song.h

@@ -146,6 +146,7 @@ enum DivSystem {
   DIV_SYSTEM_UPD1771C,
   DIV_SYSTEM_SID3,
   DIV_SYSTEM_C64_PCM,
+  DIV_SYSTEM_YM2203_CSM_ENV,
 
   DIV_SYSTEM_MAX
 };

src/engine/sysDef.cpp

@@ -1252,6 +1252,20 @@ void DivEngine::registerSystems() {
     fmExtChEffectHandlerMap
   );
 
+  sysDefs[DIV_SYSTEM_YM2203_CSM_ENV]=new DivSysDef(
+    _("Yamaha YM2203 (OPN) CSM + Envelope"), NULL, 0xfe, 0, 11, true, true, 0x151, false, 1U<<DIV_SAMPLE_DEPTH_8BIT, 0, 0,
+    _("cost-reduced version of the OPM with a different register layout and no stereo...\n...but it has a built-in AY-3-8910! (actually an YM2149)\nthis one is in Extended Channel mode, which turns the third FM channel into four operators with independent notes/frequencies."
+    "\nthis one includes CSM mode control for special effects on Channel 3."),
+    {_("FM 1"), _("FM 2"), _("FM 3 OP1"), _("FM 3 OP2"), _("FM 3 OP3"), _("FM 3 OP4"), _("CSM Timer"), _("PSG 1"), _("PSG 2"), _("PSG 3"), _("Envelope")},
+    {"F1", "F2", "O1", "O2", "O3", "O4", "CSM", "S1", "S2", "S3", "ENV"},
+    {DIV_CH_FM, DIV_CH_FM, DIV_CH_OP, DIV_CH_OP, DIV_CH_OP, DIV_CH_OP, DIV_CH_NOISE, DIV_CH_PULSE, DIV_CH_PULSE, DIV_CH_PULSE, DIV_CH_NOISE},
+    {DIV_INS_FM, DIV_INS_FM, DIV_INS_FM, DIV_INS_FM, DIV_INS_FM, DIV_INS_FM, DIV_INS_FM, DIV_INS_AY, DIV_INS_AY, DIV_INS_AY, DIV_INS_AY},
+    {},
+    {},
+    fmOPNPostEffectHandlerMap,
+    fmExtChEffectHandlerMap
+  );
+
   sysDefs[DIV_SYSTEM_YM2608]=new DivSysDef(
     _("Yamaha YM2608 (OPNA)"), NULL, 0x8e, 0, 16, true, true, 0x151, false, (1U<<DIV_SAMPLE_DEPTH_ADPCM_B)|(1U<<DIV_SAMPLE_DEPTH_8BIT), 0, 0,
     _("OPN but twice the FM channels, stereo makes a come-back and has rhythm and ADPCM channels."),

src/gui/insEdit.cpp

@@ -8083,7 +8083,7 @@ void FurnaceGUI::drawInsEdit() {
               macroList.push_back(FurnaceGUIMacroDesc(_("Volume"),&ins->std.volMacro,0,15,160,uiColors[GUI_COLOR_MACRO_VOLUME]));
               macroList.push_back(FurnaceGUIMacroDesc(_("Arpeggio"),&ins->std.arpMacro,-120,120,160,uiColors[GUI_COLOR_MACRO_PITCH],true,NULL,macroHoverNote,false,NULL,true,ins->std.arpMacro.val));
               if (!ins->amiga.useSample) {
-                macroList.push_back(FurnaceGUIMacroDesc(_("Noise Freq"),&ins->std.dutyMacro,0,31,160,uiColors[GUI_COLOR_MACRO_NOISE]));
+                macroList.push_back(FurnaceGUIMacroDesc(_("Noise Freq"),&ins->std.dutyMacro,0,31,160,uiColors[GUI_COLOR_MACRO_NOISE],true,macroRelativeMode));
                 macroList.push_back(FurnaceGUIMacroDesc(_("Waveform"),&ins->std.waveMacro,0,3,48,uiColors[GUI_COLOR_MACRO_WAVE],false,NULL,NULL,true,ayShapeBits));
               }
               macroList.push_back(FurnaceGUIMacroDesc(_("Pitch"),&ins->std.pitchMacro,-2048,2047,160,uiColors[GUI_COLOR_MACRO_PITCH],true,macroRelativeMode));

src/gui/presets.cpp

@@ -3242,6 +3242,11 @@ void FurnaceGUI::initSystemPresets() {
         CH(DIV_SYSTEM_YM2203_CSM, 1.0f, 0, "clockSel=3")
       }
     );
+    SUB_ENTRY(
+      _("Yamaha YM2203 (CSM) with Envelope"), {
+        CH(DIV_SYSTEM_YM2203_CSM_ENV, 1.0f, 0, "clockSel=3")
+      }
+    );
   ENTRY(
     _("Yamaha YM2608 (OPNA)"), {
       CH(DIV_SYSTEM_YM2608, 1.0f, 0, "")

src/gui/sysConf.cpp

@@ -1343,6 +1343,7 @@ bool FurnaceGUI::drawSysConf(int chan, int sysPos, DivSystem type, DivConfig& fl
     }
     case DIV_SYSTEM_YM2203:
     case DIV_SYSTEM_YM2203_EXT:
+    case DIV_SYSTEM_YM2203_CSM_ENV:
     case DIV_SYSTEM_YM2203_CSM: {
       int clockSel=flags.getInt("clockSel",0);
       int prescale=flags.getInt("prescale",0);
@@ -1350,6 +1351,10 @@ bool FurnaceGUI::drawSysConf(int chan, int sysPos, DivSystem type, DivConfig& fl
       bool fbAllOps=flags.getBool("fbAllOps",false);
       int ssgVol=flags.getInt("ssgVol",128);
       int fmVol=flags.getInt("fmVol",256);
+      // these are for the SSG part
+      int panLaw=flags.getInt("panLaw",0);
+      bool stereo=flags.getBool("stereo",false);
+      int stereoSep=flags.getInt("stereoSep",0);
 
       ImGui::Text(_("Clock rate:"));
       ImGui::Indent();
@@ -1415,6 +1420,39 @@ bool FurnaceGUI::drawSysConf(int chan, int sysPos, DivSystem type, DivConfig& fl
         }
       }
 
+      if (type==DIV_SYSTEM_YM2203_CSM_ENV) {
+        if (ImGui::Checkbox(_("Stereo##_AY_STEREO"),&stereo)) {
+          altered=true;
+        }
+        if (stereo) {
+          int sep=256-(stereoSep&255);
+          if (CWSliderInt(_("Separation"),&sep,1,256)) {
+            if (sep<1) sep=1;
+            if (sep>256) sep=256;
+            stereoSep=256-sep;
+            altered=true;
+          }
+          ImGui::Text(_("Center level:"));
+          ImGui::Indent();
+          if (ImGui::RadioButton(_("-0 dB (VGMPlay)"),panLaw==0)) {
+            panLaw=0;
+            altered=true;
+          }
+          if (ImGui::RadioButton(_("-3 dB"),panLaw==1)) {
+            panLaw=1;
+            altered=true;
+          }
+          if (ImGui::RadioButton(_("-6 dB (most hardwares)"),panLaw==2)) {
+            panLaw=2;
+            altered=true;
+          }
+          ImGui::Unindent();
+          if (ImGui::IsItemHovered()) {
+            ImGui::SetTooltip(_("note: not supported by the VGM format!"));
+          }
+        }
+      }
+
       if (altered) {
         e->lockSave([&]() {
           flags.set("clockSel",clockSel);
@@ -1423,6 +1461,9 @@ bool FurnaceGUI::drawSysConf(int chan, int sysPos, DivSystem type, DivConfig& fl
           flags.set("fbAllOps",fbAllOps);
           flags.set("ssgVol",ssgVol);
           flags.set("fmVol",fmVol);
+          flags.set("stereo",stereo);
+          flags.set("stereoSep",stereoSep);
+          flags.set("panLaw",panLaw);
         });
       }
       break;