--- nono/vm/upd7201.h	2026/04/29 17:04:56	1.1.1.7
+++ nono/vm/upd7201.h	2026/04/29 17:05:03	1.1.1.9
@@ -25,8 +25,10 @@
 // 用意するほうが楽なので、こうなっている。
 struct SIO
 {
-	//     | b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0 |
+	//       b7   b6   b5   b4   b3   b2   b1   b0
+	//     +---------+--------------+--------------+
 	// CR0 |   CRC   |   Command    |   Pointer    |
+	//     +---------+--------------+--------------+
 	static const int CR0_CRC		= 0xc0;
 	static const int CR0_CMD		= 0x38;
 	static const int CR0_PTR		= 0x07;
@@ -37,8 +39,10 @@ struct SIO
 	static const int WR0_CMD		= CR0_CMD;
 	static const int WR0_PTR		= 0x0f;
 
-	//     | b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0 |
+	//       b7   b6   b5   b4   b3   b2   b1   b0
+	//     +----+----+----+---------+----+----+----+
 	// CR1 | WE | -- | WR |  RX Int | -- | TE | ES |
+	//     +----+----+----+---------+----+----+----+
 	//       |         |       |           |    +---- E/S Int Enable
 	//       |         |       |           +--------- TX INT/DMA Enable
 	//       |         |       +--------------------- RX Int Mode
@@ -62,8 +66,10 @@ struct SIO
 	static const int RXINT_ALL_INC_SPECIAL	= 0x10;	// All char include special
 	static const int RXINT_ALL_EXC_SPECIAL	= 0x18;	// All char exclude special
 
-	//     | b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0 |
+	//       b7   b6   b5   b4   b3   b2   b1   b0
+	//     +---------+----+-------------------+----+
 	// CR3 | RX bits | AE | --   --   --   -- | RE |
+	//     +---------+----+-------------------+----+
 	//          |      |                        +---- RX Enable
 	//          |      +----------------------------- Auto Enable
 	//          +------------------------------------ RX bits
@@ -75,8 +81,10 @@ struct SIO
 	static const int WR3_AUTO_EN	= CR3_AUTO_EN;
 	static const int WR3_RX_EN		= CR3_RX_EN;
 
-	//     | b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0 |
+	//       b7   b6   b5   b4   b3   b2   b1   b0
+	//     +---------+---------+---------+----+----+
 	// CR4 | ClkRate | SyncMode| StopBits| PV | PE |
+	//     +---------+---------+---------+----+----+
 	//          |         |         |      |    +---- Parity Enable(%1)
 	//          |         |         |      +--------- Parity Even(%1)
 	//          |         |         +---------------- Stop Bits
@@ -111,8 +119,10 @@ struct SIO
 		HDLC = 2,
 	};
 
-	//     | b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0 |
+	//       b7   b6   b5   b4   b3   b2   b1   b0
+	//     +----+---------+----+----+----+----+----+
 	// CR5 | DTR| TX bits | SB | TE | CRC| RTS| TC |
+	//     +----+---------+----+----+----+----+----+
 	//       |       |      |    |    |    |    +---- TX CRC Enable
 	//       |       |      |    |    |    +--------- ~RTS
 	//       |       |      |    |    +-------------- CRC-16/CCITT
@@ -136,8 +146,10 @@ struct SIO
 	static const int WR5_RTS		= CR5_RTS;
 	static const int WR5_TXCRC_EN	= CR5_TXCRC_EN;
 
-	//     | b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0 |
+	//       b7   b6   b5   b4   b3   b2   b1   b0
+	//     +----+----+----+----+----+----+----+----+
 	// SR0 | BA | TU | CTS| SY | DCD| TE | IP | RA |
+	//     +----+----+----+----+----+----+----+----+
 	static const int SR0_BREAK		= 0x80;	// Break/Abort
 	static const int SR0_TXUNDER	= 0x40;	// Tx Underrun
 	static const int SR0_CTS		= 0x20;	// CTS
@@ -156,8 +168,10 @@ struct SIO
 	static const int RR0_INTPEND	= SR0_INTPEND;
 	static const int RR0_RXAVAIL	= SR0_RXAVAIL;
 
-	//     | b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0 |
+	//       b7   b6   b5   b4   b3   b2   b1   b0
+	//     +----+----+----+----+--------------+----+
 	// SR1 | EF | CRC| RO | PE | ResidueCode  | AS |
+	//     +----+----+----+----+--------------+----+
 	static const int SR1_ENDOFFRAME	= 0x80;	// End of Frame
 	static const int SR1_CRCERROR	= 0x40;	// CRC/Framing Error
 	static const int SR1_RXOVERRUN	= 0x20;	// Rx Overrun
@@ -276,9 +290,6 @@ class uPD7201Device : public IODevice
 	bool Rx(int ch, uint32 data);
 
  protected:
-	// チップリセット
-	void Reset();
-
 	void ResetChannel(struct SIO::channel *chan);
 	virtual uint8 ReadCtrl(struct SIO::channel *chan);
 	uint8 ReadData(struct SIO::channel *chan);
@@ -296,16 +307,16 @@ class uPD7201Device : public IODevice
 
 	static const int bits_per_char[4];
 
- private:
 	void WriteCR0(struct SIO::channel *chan, uint32 data);
 	void WriteCR1(struct SIO::channel *chan, uint32 data);
 	void WriteCR2(struct SIO::channel *chan, uint32 data);
 	void WriteCR3(struct SIO::channel *chan, uint32 data);
 	void WriteCR4(struct SIO::channel *chan, uint32 data);
-	void WriteCR5(struct SIO::channel *chan, uint32 data);
+	virtual void WriteCR5(struct SIO::channel *chan, uint32 data);
 	void WriteCR6(struct SIO::channel *chan, uint32 data);
 	void WriteCR7(struct SIO::channel *chan, uint32 data);
 
+ private:
 	void ChangeInterrupt();
 
 	DECLARE_MONITOR_CALLBACK(MonitorUpdate);