1 files changed, 14 insertions, 0 deletions
diff --git a/src/chips/esfmu_opl3.h b/src/chips/esfmu_opl3.h
index b01d784..43eb09a 100644
--- a/src/chips/esfmu_opl3.h
+++ b/src/chips/esfmu_opl3.h
@@ -26,6 +26,20 @@
 class ESFMuOPL3 final : public OPLChipBaseT<ESFMuOPL3>
 {
     void *m_chip;
+
+    static const size_t c_queueSize = 500;
+
+    struct Reg
+    {
+        uint32_t addr;
+        uint8_t data;
+    };
+
+    Reg m_queue[c_queueSize];
+    size_t m_headPos;
+    size_t m_tailPos;
+    long m_queueCount;
+
 public:
     ESFMuOPL3();
     ~ESFMuOPL3() override;