--- nono/vm/crtc2.h	2026/04/29 17:04:28	1.1.1.1
+++ nono/vm/crtc2.h	2026/04/29 17:04:31	1.1.1.2
@@ -18,13 +18,12 @@ class CRTC2Device
 
 	virtual void ResetHard();
 
-	virtual uint64 Read8(uint32 addr);
-	virtual uint64 Read16(uint32 addr);
-	virtual uint64 Read32(uint32 addr);
-	virtual uint64 Write8(uint32 addr, uint32 data);
-	virtual uint64 Write16(uint32 addr, uint32 data);
-	virtual uint64 Write32(uint32 addr, uint32 data);
-	virtual uint64 Peek8(uint32 addr);
+ protected:
+	// BusIO インタフェース
+	static const uint32 NPORT = 2;
+	uint64 Read(uint32 addr);
+	uint64 Write(uint32 addr, uint32 data);
+	uint64 Peek(uint32 addr);
 
  private:
 	// 垂直表示期間イベント