implement sample loop on the rest of systems

src/engine/platform/genesis.cpp

@@ -26,7 +26,11 @@ void DivPlatformGenesis::acquire(short* bufL, short* bufR, size_t start, size_t
           }
         }
         if (dacPos>=s->rendLength) {
-          dacSample=-1;
+          if (s->loopStart>=0 && s->loopStart<=(int)s->rendLength) {
+            dacPos=s->loopStart;
+          } else {
+            dacSample=-1;
+          }
         }
         dacPeriod+=dacRate;
       }