--- nono/vm/opm.h	2026/04/29 17:05:25	1.1.1.7
+++ nono/vm/opm.h	2026/04/29 17:05:29	1.1.1.8
@@ -20,7 +20,7 @@ class OPMDevice : public IODevice
 {
 	using inherited = IODevice;
 
-	static const int baseaddr = 0xe90000;
+	static const uint32 baseaddr = 0xe90000;
 	static const uint64 clk = 250_nsec;		// 4MHz
 
  public:
@@ -33,9 +33,10 @@ class OPMDevice : public IODevice
  protected:
 	// BusIO インタフェース
 	static const uint32 NPORT = 2;
-	busdata Read(uint32 offset);
-	busdata Write(uint32 offset, uint32 data);
-	busdata Peek(uint32 offset);
+	busdata ReadPort(uint32 offset);
+	busdata WritePort(uint32 offset, uint32 data);
+	busdata PeekPort(uint32 offset);
+	bool PokePort(uint32 offset, uint32 data);
 
  private:
 	bool IsBusy() const;