--- nono/vm/qemusysctlr.h	2026/04/29 17:05:25	1.1.1.1
+++ nono/vm/qemusysctlr.h	2026/04/29 17:05:29	1.1.1.2
@@ -22,7 +22,10 @@ class QemuSysCtlrDevice : public IODevic
 	QemuSysCtlrDevice();
 	~QemuSysCtlrDevice() override;
 
-	busdata Read32(uint32 addr) override;
-	busdata Write32(uint32 addr,  uint32 data) override;
-	busdata Peek8(uint32 addr) override;
+ protected:
+	// BusIO インタフェース
+	static const uint32 NPORT = 0x100 >> 2;
+	busdata ReadPort(uint32 offset);
+	busdata WritePort(uint32 offset,  uint32 data);
+	busdata PeekPort(uint32 offset);
 };