--- nono/vm/sysport.h	2026/04/29 17:05:18	1.1.1.11
+++ nono/vm/sysport.h	2026/04/29 17:05:33	1.1.1.14
@@ -19,21 +19,21 @@ class MainRAMDevice;
 class NMIDevice;
 class ROMDevice;
 class SRAMDevice;
+class VideoCtlrDevice;
 
 struct SYSPORT
 {
-	static const int CONTRAST	= 0;	// $E8E001
-	static const int SCOPE3D	= 1;	// $E8E003
-	static const int IMAGEUNIT	= 2;	// $E8E005
-	static const int KEY		= 3;	// $E8E007
-	static const int WAIT		= 4;	// $E8E009
-	static const int MPU		= 5;	// $E8E00B
-	static const int SRAMWP		= 6;	// $E8E00D
-	static const int POWEROFF	= 7;	// $E8E00F
-
-	int contrast;
-	int rom_wait;	// 設定値。ウェイトにする時には +2 する
-	int ram_wait;	// 設定値。
+	static const uint CONTRAST	= 0;	// $E8E001
+	static const uint SCOPE3D	= 1;	// $E8E003
+	static const uint IMAGEUNIT	= 2;	// $E8E005
+	static const uint KEY		= 3;	// $E8E007
+	static const uint WAIT		= 4;	// $E8E009
+	static const uint MPU		= 5;	// $E8E00B
+	static const uint SRAMWP	= 6;	// $E8E00D
+	static const uint POWEROFF	= 7;	// $E8E00F
+
+	int rom_wait;	// システムポートへの書き込み値ではなく ROM への指示値。
+	int ram_wait;	// システムポートへの書き込み値ではなく RAM への指示値。
 	bool key_ctrl;
 	uint pwoff_count;
 };
@@ -46,7 +46,7 @@ class SysportDevice : public IODevice
 
  public:
 	SysportDevice();
-	virtual ~SysportDevice() override;
+	~SysportDevice() override;
 
 	bool Init() override;
 	void ResetHard(bool poweron) override;
@@ -59,13 +59,18 @@ class SysportDevice : public IODevice
  protected:
 	// BusIO インタフェース
 	static const uint32 NPORT = 8;
-	uint64 Read(uint32 offset);
-	uint64 Write(uint32 offset, uint32 data);
-	uint64 Peek(uint32 offset);
+	busdata ReadPort(uint32 offset);
+	busdata WritePort(uint32 offset, uint32 data);
+	busdata PeekPort(uint32 offset);
+	bool PokePort(uint32 offset, uint32 data);
 
  private:
+	DECLARE_MONITOR_CALLBACK(MonitorUpdate);
+
 	struct SYSPORT sysport {};
 
+	Monitor *monitor {};
+
 	CGROMDevice *cgrom {};
 	IPLROM1Device *iplrom1 {};
 	ROMDevice *iplrom2 {};
@@ -73,6 +78,7 @@ class SysportDevice : public IODevice
 	MainRAMDevice *mainram {};
 	NMIDevice *nmi {};
 	SRAMDevice *sram {};
+	VideoCtlrDevice *videoctlr {};
 };
 
 static inline SysportDevice *GetSysportDevice() {