--- nono/vm/sio.h	2026/04/29 17:04:56	1.1.1.7
+++ nono/vm/sio.h	2026/04/29 17:05:10	1.1.1.9
@@ -4,18 +4,24 @@
 // Licensed under nono-license.txt
 //
 
+//
+// SIO (uPD7201)
+//
+
 #pragma once
 
 #include "device.h"
-#include "upd7201.h"
+#include "mpscc.h"
 
-class SIODevice : public uPD7201Device
+class SIODevice : public MPSCCDevice
 {
-	using inherited = uPD7201Device;
+	using inherited = MPSCCDevice;
  public:
 	SIODevice();
 	virtual ~SIODevice() override;
 
+	void ResetHard(bool poweron) override;
+
 	// BusIO インタフェース
 	// (内蔵 ROM からのアクセス用に特別に public にしてある)
 	uint64 Read(uint32 offset);
@@ -26,8 +32,44 @@ class SIODevice : public uPD7201Device
 	static const uint32 NPORT = 4;
 	uint64 Peek(uint32 offset);
 
+	void Tx(int ch, uint32 data) override;
+	uint GetHighestInt() const override;
+
  private:
-	void Interrupt() override;
+	// 指定のレジスタ名を返す
+	const char *CRName(const MPSCCChan&, int n) const override;
+	const char *SRName(const MPSCCChan&, int n) const override;
+	// 現在のレジスタ名を返す
+	const char *CRName(const MPSCCChan& chan) const {
+		return CRName(chan, chan.ptr);
+	}
+	const char *SRName(const MPSCCChan& chan) const {
+		return SRName(chan, chan.ptr);
+	}
+
+	void ResetChannel(MPSCCChan&);
+
+	uint8 ReadCtrl(MPSCCChan&);
+	void WriteCtrl(MPSCCChan&, uint32 data);
+	uint8 PeekCtrl(const MPSCCChan&) const;
+
+	uint8 GetCR1(const MPSCCChan&) const;
+	uint8 GetCR2A() const;
+	uint8 GetCR2B() const;
+	uint8 GetSR0(const MPSCCChan&) const;
+
+	void WriteCR0(MPSCCChan&, uint32 data);
+	void WriteCR1(MPSCCChan&, uint32 data);
+	void WriteCR2(MPSCCChan&, uint32 data);
+
+	// VIS モードを更新
+	void SetVIS();
+
+	DECLARE_MONITOR_CALLBACK(MonitorUpdate);
+	void MonitorUpdateCh(TextScreen&, int ch, int xbase, int ybase);
+
+	static const char * const crnames[16];
+	static const char * const srnames[16];
 };
 
-extern std::unique_ptr<SIODevice> gSIO;
+extern SIODevice *gSIO;