C219: bank hints

issue #1759

src/engine/platform/c140.cpp

@@ -314,6 +314,10 @@ void DivPlatformC140::tick(bool sysTick) {
       }
     }
   }
+
+  for (int i=0; i<4; i++) {
+    bankLabel[i][0]='0'+groupBank[i];
+  }
 }
 
 int DivPlatformC140::dispatch(DivCommand c) {
@@ -557,6 +561,14 @@ float DivPlatformC140::getPostAmp() {
   return 3.0f;
 }
 
+DivChannelPair DivPlatformC140::getPaired(int ch) {
+  if (!is219) return DivChannelPair();
+  if ((ch&3)==0) {
+    return DivChannelPair(bankLabel[ch>>2],ch+1,ch+2,ch+3,-1,-1,-1,-1,-1);
+  }
+  return DivChannelPair();
+}
+
 const void* DivPlatformC140::getSampleMem(int index) {
   return index == 0 ? sampleMem : NULL;
 }
@@ -736,7 +748,9 @@ int DivPlatformC140::init(DivEngine* p, int channels, int sugRate, const DivConf
   parent=p;
   dumpWrites=false;
   skipRegisterWrites=false;
-  bankType=2;
+  bankType=0;
+
+  memset(bankLabel,0,16);
 
   for (int i=0; i<totalChans; i++) {
     isMuted[i]=false;

src/engine/platform/c140.h

@@ -75,6 +75,7 @@ class DivPlatformC140: public DivDispatch {
   struct c140_t c140;
   struct c219_t c219;
   unsigned char regPool[512];
+  char bankLabel[4][4];
   friend void putDispatchChip(void*,int);
   friend void putDispatchChan(void*,int,int);
 
@@ -87,6 +88,7 @@ class DivPlatformC140: public DivDispatch {
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
     unsigned short getPan(int chan);
+    DivChannelPair getPaired(int chan);
     DivDispatchOscBuffer* getOscBuffer(int chan);
     unsigned char* getRegisterPool();
     int getRegisterPoolSize();