--- nono/vm/scc.h	2026/04/29 17:04:36	1.1.1.3
+++ nono/vm/scc.h	2026/04/29 17:04:56	1.1.1.6
@@ -9,8 +9,7 @@
 #include "device.h"
 #include "upd7201.h"
 
-class SCCDevice
-	: public uPD7201Device
+class SCCDevice : public uPD7201Device
 {
 	using inherited = uPD7201Device;
  private:
@@ -18,22 +17,24 @@ class SCCDevice
 
  public:
 	SCCDevice();
-	~SCCDevice() override;
-
-	void ResetHard() override;
+	virtual ~SCCDevice() override;
 
 	// XXX 親の同名メソッドと名前分けたほうがいいか
 	uint8 ReadCtrl(struct SIO::channel *chan) override;
 	void WriteCtrl(struct SIO::channel *chan, uint32 data) override;
 
-	void Interrupt() override;
+	// 割り込みアクノリッジ
+	int InterruptAcknowledge();
 
  protected:
 	// BusIO インタフェース
 	static const uint32 NPORT = 4;
-	uint64 Read(uint32 addr);
-	uint64 Write(uint32 addr, uint32 data);
-	uint64 Peek(uint32 addr);
+	uint64 Read(uint32 offset);
+	uint64 Write(uint32 offset, uint32 data);
+	uint64 Peek(uint32 offset);
+
+ private:
+	void Interrupt() override;
 };
 
 extern std::unique_ptr<SCCDevice> gSCC;