--- nono/vm/fdc.h	2026/04/29 17:04:44	1.1.1.4
+++ nono/vm/fdc.h	2026/04/29 17:04:50	1.1.1.5
@@ -72,7 +72,7 @@ struct FDC {
 	static const int STAT_RQM		= 0x80;	// Request For Master
 	static const int STAT_DIO		= 0x40;	// Data Input/Output
 	static const int STAT_NDM		= 0x20;	// Non-DMA Mode
-	static const int STAT_CB 		= 0x10;	// FDC Busy
+	static const int STAT_CB		= 0x10;	// FDC Busy
 	static const int STAT_D3B		= 0x08;	// FD3 Busy
 	static const int STAT_D2B		= 0x04;	// FD2 Busy
 	static const int STAT_D1B		= 0x02;	// FD1 Busy
@@ -116,9 +116,9 @@ class FDCDevice
  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:
 	uint32 ReadStatus();