--- nono/vm/x68kio.h	2026/04/29 17:05:25	1.1.1.3
+++ nono/vm/x68kio.h	2026/04/29 17:05:29	1.1.1.4
@@ -21,15 +21,10 @@ class X68kIODevice : public MainbusBaseD
 
 	bool InitMainbus() override;
 
-	busdata Peek8(uint32 addr) override;
-	bool Poke8(uint32 addr, uint32 data) override;
-
-	busdata Read8(busaddr addr) override;
-	busdata Read16(busaddr addr) override;
-	busdata Read32(busaddr addr) override;
-	busdata Write8(busaddr addr, uint32 data) override;
-	busdata Write16(busaddr addr, uint32 data) override;
-	busdata Write32(busaddr addr, uint32 data) override;
+	busdata Read(busaddr addr) override;
+	busdata Write(busaddr addr, uint32 data) override;
+	busdata Peek1(uint32 addr) override;
+	bool Poke1(uint32 addr, uint32 data) override;
 
 	// ブートページを切り替える。(X68kMainbus から呼ばれる)
 	void SwitchBootPage(bool isrom) override;
@@ -38,8 +33,8 @@ class X68kIODevice : public MainbusBaseD
 	uint8 GetAreaset() const { return arealimit; }
 	void SetAreaset(uint8 arealimit_);
 	// 拡張エリアセット。
-	uint8 GetExtarea(int offset) const;
-	void SetExtarea(int offset, uint8 data);
+	uint8 GetExtarea(uint offset) const;
+	void SetExtarea(uint offset, uint8 data);
 
  private:
 	void SetUdevice(uint32 startaddr, uint32 endaddr, bool accessible);