--- nono/vm/sysport.h	2026/04/29 17:05:18	1.1.1.11
+++ nono/vm/sysport.h	2026/04/29 17:05:25	1.1.1.12
@@ -11,6 +11,7 @@
 #pragma once
 
 #include "device.h"
+#include "monitor.h"
 
 class CGROMDevice;
 class IPLROM1Device;
@@ -19,6 +20,7 @@ class MainRAMDevice;
 class NMIDevice;
 class ROMDevice;
 class SRAMDevice;
+class VideoCtlrDevice;
 
 struct SYSPORT
 {
@@ -31,9 +33,8 @@ struct SYSPORT
 	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。
+	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 +47,7 @@ class SysportDevice : public IODevice
 
  public:
 	SysportDevice();
-	virtual ~SysportDevice() override;
+	~SysportDevice() override;
 
 	bool Init() override;
 	void ResetHard(bool poweron) override;
@@ -59,13 +60,17 @@ 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 Read(uint32 offset);
+	busdata Write(uint32 offset, uint32 data);
+	busdata Peek(uint32 offset);
 
  private:
+	DECLARE_MONITOR_CALLBACK(MonitorUpdate);
+
 	struct SYSPORT sysport {};
 
+	Monitor monitor { this };
+
 	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() {