--- nono/vm/printer.h	2026/04/29 17:05:18	1.1.1.7
+++ nono/vm/printer.h	2026/04/29 17:05:50	1.1.1.10
@@ -16,15 +16,21 @@ class PrinterDevice : public IODevice
 {
 	using inherited = IODevice;
 
-	static const int baseaddr = 0xe8c000;
+	static const uint32 baseaddr = 0xe8c000;
 
  public:
 	PrinterDevice();
-	virtual ~PrinterDevice() override;
+	~PrinterDevice() override;
 
-	uint64 Read8(uint32 addr) override;
-	uint64 Read16(uint32 addr) override;
-	uint64 Write8(uint32 addr, uint32 data) override;
-	uint64 Write16(uint32 addr, uint32 data) override;
-	uint64 Peek8(uint32 addr) override;
+ protected:
+	// BusIO インタフェース
+	// XXX まだ調べてない
+	static const uint32 NPORT = 2;
+	busdata ReadPort(uint32 offset);
+	busdata WritePort(uint32 offset, uint32 data);
+	busdata PeekPort(uint32 offset);
+	bool PokePort(uint32 offset, uint32 data);
+
+ private:
+	static const busdata wait;
 };