--- nono/vm/extram.h	2026/04/29 17:05:18	1.1
+++ nono/vm/extram.h	2026/04/29 17:05:25	1.1.1.2
@@ -17,19 +17,19 @@ class ExtRAMDevice : public IODevice
 	using inherited = IODevice;
  public:
 	ExtRAMDevice();
-	virtual ~ExtRAMDevice() override;
+	~ExtRAMDevice() override;
 
 	bool Init() override;
 	void ResetHard(bool poweron) override;
 
-	uint64 Read8(uint32 addr) override;
-	uint64 Read16(uint32 addr) override;
-	uint64 Read32(uint32 addr) override;
-	uint64 Write8(uint32 addr, uint32 data) override;
-	uint64 Write16(uint32 addr, uint32 data) override;
-	uint64 Write32(uint32 addr, uint32 data) override;
-	uint64 Peek8(uint32 addr) override;
-	uint64 Poke8(uint32 addr, uint32 data) override;
+	busdata Read8(uint32 addr) override;
+	busdata Read16(uint32 addr) override;
+	busdata Read32(uint32 addr) override;
+	busdata Write8(uint32 addr, uint32 data) override;
+	busdata Write16(uint32 addr, uint32 data) override;
+	busdata Write32(uint32 addr, uint32 data) override;
+	busdata Peek8(uint32 addr) override;
+	bool Poke8(uint32 addr, uint32 data) override;
 
 	// 拡張メモリ容量(バイト単位)を取得
 	int GetSize() const	{ return ram_size; }