bind SMS platform to Genesis one

src/engine/platform/genesis.cpp

@@ -6,7 +6,7 @@
 // TODO fix all the writes.
 // i think there is no wait for data writes, just for ON/OFF writes
 void DivPlatformGenesis::acquire(short& l, short& r) {
-  short o[2];
+  static short o[2];
 
   if (dacMode && dacSample!=-1) {
     if (--dacPeriod<1) {
@@ -38,8 +38,16 @@ void DivPlatformGenesis::acquire(short& l, short& r) {
   }
   OPN2_Clock(&fm,o);
   //OPN2_Write(&fm,0,0);
-  l=o[0]<<7;
-  r=o[1]<<7;
+  
+  psgClocks+=223722;
+  if (psgClocks>=rate) {
+    psg.acquire(psgOut,psgOut);
+    psgClocks-=rate;
+    psgOut>>=2;
+  }
+
+  l=(o[0]<<7)+psgOut;
+  r=(o[1]<<7)+psgOut;
 }
 
 static unsigned short chanOffs[6]={
@@ -122,12 +130,17 @@ void DivPlatformGenesis::tick() {
       chan[i].keyOn=false;
     }
   }
+
+  psg.tick();
 }
 
 #define rWrite(a,v) pendingWrites[a]=v;
 
 int DivPlatformGenesis::dispatch(DivCommand c) {
-  if (c.chan>5) return 0;
+  if (c.chan>5) {
+    c.chan-=6;
+    return psg.dispatch(c);
+  }
   switch (c.cmd) {
     case DIV_CMD_NOTE_ON: {
       if (c.chan==5 && dacMode) {
@@ -313,5 +326,10 @@ int DivPlatformGenesis::init(DivEngine* p, int channels, int sugRate) {
   writes.emplace(0x22,0x08);
   
   delay=0;
+  
+  // PSG
+  psg.init(p,4,sugRate);
+  psgClocks=0;
+  psgOut=0;
   return 10;
 }

src/engine/platform/genesis.h

@@ -2,6 +2,8 @@
 #include <queue>
 #include "../../../extern/Nuked-OPN2/ym3438.h"
 
+#include "sms.h"
+
 class DivPlatformGenesis: public DivDispatch {
   struct Channel {
     unsigned char freqH, freqL;
@@ -22,6 +24,9 @@ class DivPlatformGenesis: public DivDispatch {
   };
   std::queue<QueuedWrite> writes;
   ym3438_t fm;
+  DivPlatformSMS psg;
+  int psgClocks;
+  short psgOut;
   int delay;
   unsigned char lastBusy;
 

src/engine/platform/sms.cpp

@@ -56,6 +56,8 @@ int DivPlatformSMS::dispatch(DivCommand c) {
       break;
     case DIV_CMD_NOTE_OFF:
       chan[c.chan].active=false;
+      sn->write(0x9f|c.chan<<5);
+      chan[c.chan].std.init(NULL);
       break;
     case DIV_CMD_INSTRUMENT:
       chan[c.chan].ins=c.value;
@@ -84,7 +86,7 @@ int DivPlatformSMS::init(DivEngine* p, int channels, int sugRate) {
   rate=223722;
   sn=new sn76496_device("sn",223722);
   sn->device_start();
-  snNoiseMode=0;
+  snNoiseMode=3;
   updateSNMode=false;
   return 4;
 }

src/engine/platform/sms.h

@@ -1,3 +1,6 @@
+#ifndef _SMS_H
+#define _SMS_H
+
 #include "../dispatch.h"
 #include "../macroInt.h"
 #include "sound/sn76496.h"
@@ -21,3 +24,5 @@ class DivPlatformSMS: public DivDispatch {
     void tick();
     int init(DivEngine* parent, int channels, int sugRate);
 };
+
+#endif