--- nono/vm/rom.h	2026/04/29 17:05:17	1.1.1.10
+++ nono/vm/rom.h	2026/04/29 17:05:25	1.1.1.11
@@ -17,21 +17,21 @@ class ROMDevice : public IODevice
 	using inherited = IODevice;
  public:
 	ROMDevice(int objid_);
-	virtual ~ROMDevice() override;
+	~ROMDevice() 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;
+	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;
 
 	// ファイル名を取得。なければ NULL。
 	const char *GetFilename() const;
 
-	// アクセスウェイトを設定
-	void SetWait(uint32 wait_) { wait = wait_; }
+	// アクセスウェイト [clock] を取得/設定
+	void SetWait(uint32 wait_);
 
  protected:
 	bool LoadROM(const char *name, int size);
@@ -55,8 +55,8 @@ class ROMDevice : public IODevice
 
 	// ライトアクセス時の動作 (Write*() の戻り値)。
 	// 派生クラスが指定すること。
-	uint64 write_op {};
+	busdata write_op {};
 
 	// アクセスウェイト
-	uint32 wait {};
+	busdata wait {};
 };