--- nono/vm/mainbus_x68k.h	2026/04/29 17:05:25	1.1.1.1
+++ nono/vm/mainbus_x68k.h	2026/04/29 17:05:33	1.1.1.3
@@ -28,15 +28,10 @@ class X68kMainbus final : public Mainbus
 	void ResetByMPU() override;
 	void ResetHard(bool poweron) 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;
 
  private:
 	DECLARE_MONITOR_CALLBACK(MonitorUpdate);
@@ -53,17 +48,8 @@ class X68kMainbus final : public Mainbus
 	std::unique_ptr<IODevice> pInterrupt {};
 
 	std::array<bool, 256> is_intio {};
-	// 拡張メモリの開始位置 [MB]
-	int extstart {};
-	// 拡張メモリのサイズ [MB]
-	int extsize {};
-
-	// アクセス状況はとりあえず 1GB 分を 1048 * 1MB ずつ。
-	std::array<uint8, 1024> accstat_read {};
-	std::array<uint8, 1024> accstat_write {};
 
-	Monitor monitor { this };
-	Monitor monitor_accstat { this };
+	Monitor *monitor {};
 
 	std::array<BankRAMDevice*, 2> bankram /*{}*/;
 };