--- nono/vm/bt45x.h	2026/04/29 17:05:17	1.1.1.1
+++ nono/vm/bt45x.h	2026/04/29 17:05:25	1.1.1.2
@@ -22,14 +22,14 @@ class BT45xDevice : public IODevice
 
  public:
 	BT45xDevice();
-	virtual ~BT45xDevice() override;
+	~BT45xDevice() override;
 
 	bool Init() override;
 	void ResetHard(bool poweron) override;
 
-	uint64 Read8(uint32 addr) override;
-	uint64 Write8(uint32 addr, uint32 data) override;
-	uint64 Peek8(uint32 addr) override;
+	busdata Read8(uint32 addr) override;
+	busdata Write8(uint32 addr, uint32 data) override;
+	busdata Peek8(uint32 addr) override;
 
 	// プレーン数を取得
 	int GetPlaneCount() const { return nplane; }