--- nono/vm/scc.cpp	2026/04/29 17:05:10	1.1.1.10
+++ nono/vm/scc.cpp	2026/04/29 17:05:14	1.1.1.11
@@ -70,6 +70,8 @@ SCCDevice::ResetHard(bool poweron)
 	// XXX Reset
 
 	for (auto& chan : mpscc.chan) {
+		// XC 設定は ResetChannel() の前に必要。
+		SetXC(chan);
 		ResetChannel(chan);
 
 		// WR10 b5,6 = %0
@@ -93,6 +95,8 @@ SCCDevice::ResetHard(bool poweron)
 void
 SCCDevice::ResetChannel(MPSCCChan& chan)
 {
+	uint8 val;
+
 	// WR0 b0-7 = %0
 	chan.crc_cmd = 0;
 	chan.cmd = 0;
@@ -111,11 +115,12 @@ SCCDevice::ResetChannel(MPSCCChan& chan)
 	// WR4 b2 = %1
 	// b2,3 が StopBits 設定だが b2 だけ %1 にするらしい…。
 	// 少なくとも非同期モードにしときたいということだろうか。
-	chan.cr4 |= 0x04;
+	val = GetCR4(chan);
+	SetCR4(chan, val | 0x04);
 
 	// WR5 b1,2,3,4,7 = %0
-	chan.cr5 &= 0x61;
-	chan.tx_enable = false;
+	val = GetCR5(chan);
+	SetCR5(chan, val & 0x61);
 
 	// WR9 b5 = %0 (未実装ビット)
 
@@ -167,7 +172,7 @@ SCCDevice::Read(uint32 offset)
 		data = ReadCtrl(mpscc.chan[0]);
 		break;
 	 case 3:	// $E98007
-		putlog(0, "ChA データレジスタ読み込み (未実装)");
+		putlog(0, "Read ChA Data Register (NOT IMPLEMENTED)");
 		data = ReadData(mpscc.chan[0]);
 		break;
 	 default:
@@ -296,13 +301,14 @@ SCCDevice::ReadCtrl(MPSCCChan& chan)
 	 case 14:
 	 case 15:
 	 case 11:
-		putlog(0, "ReadCtrl 未実装 %d", chan.ptr);
+		putlog(0, "ReadCtrl %d (NOT IMPLEMENTED)", chan.ptr);
 		data = 0xff;
 		break;
 
 	 default:
 		__unreachable();
 	}
+	chan.ptr = 0;
 	return data;
 }
 
@@ -417,7 +423,6 @@ SCCDevice::PeekCtrl(const MPSCCChan& cha
 	 case 14:
 	 case 15:
 	 case 11:
-		putlog(0, "PeekCtrl 未実装 %d", chan.ptr);
 		data = 0xff;
 		break;
 
@@ -533,7 +538,8 @@ SCCDevice::WriteWR0(MPSCCChan& chan, uin
 
 	if (chan.crc_cmd != 0) {
 		// CRC は非同期モードでは不要のはず
-		putlog(3, "%s CRC リセット未実装 %d", WRName(chan, 0), chan.crc_cmd);
+		putlog(3, "%s CRC Reset %d (NOT IMPLEMENTED)",
+			WRName(chan, 0), chan.crc_cmd);
 	}
 
 	if (chan.cmd == 0 || chan.cmd == 1) {
@@ -598,7 +604,11 @@ SCCDevice::WriteWR2(uint32 data)
 void
 SCCDevice::WriteWR5(MPSCCChan& chan, uint32 data)
 {
-	bool rts = bit_falling(chan.cr5, data, MPSCC::WR5_nRTS);
+	// ~RTS 端子の立ち下がりでマウスに送信要求。
+	// ~RTS 端子の立ち下がりは nRTS ビットでは立ち上がりになる。
+	bool old_nRTS = chan.nRTS;
+	bool new_nRTS = (data & MPSCC::WR5_nRTS);
+	bool rts = (old_nRTS == false && new_nRTS);
 
 	inherited::WriteCR5(chan, data);
 
@@ -654,14 +664,14 @@ SCCDevice::WriteWR9(uint32 data)
 void
 SCCDevice::WriteWR10(MPSCCChan& chan, uint32 data)
 {
-	putlog(2, "%s <- $%02x (未実装)", WRName(chan), data);
+	putlog(2, "%s <- $%02x (NOT IMPLEMENTED)", WRName(chan), data);
 	chan.wr10 = data;
 }
 
 void
 SCCDevice::WriteWR11(MPSCCChan& chan, uint32 data)
 {
-	putlog(2, "%s <- $%02x (未実装)", WRName(chan), data);
+	putlog(2, "%s <- $%02x (NOT IMPLEMENTED)", WRName(chan), data);
 	chan.wr11 = data;
 }
 
@@ -684,14 +694,14 @@ SCCDevice::WriteWR13(MPSCCChan& chan, ui
 void
 SCCDevice::WriteWR14(MPSCCChan& chan, uint32 data)
 {
-	putlog(2, "%s <- $%02x (未実装)", WRName(chan), data);
+	putlog(2, "%s <- $%02x (NOT IMPLEMENTED)", WRName(chan), data);
 	chan.wr14 = data;
 }
 
 void
 SCCDevice::WriteWR15(MPSCCChan& chan, uint32 data)
 {
-	putlog(2, "%s <- $%02x (未実装)", WRName(chan), data);
+	putlog(2, "%s <- $%02x (NOT IMPLEMENTED)", WRName(chan), data);
 	chan.wr15 = data;
 }
 
@@ -756,6 +766,8 @@ SCCDevice::MonitorUpdateCh(TextScreen& s
 	uint wr3;
 	uint wr4;
 	uint wr5;
+	uint wr6;
+	uint wr7;
 	uint wr10;
 	uint wr11;
 	uint wr14;
@@ -774,8 +786,10 @@ SCCDevice::MonitorUpdateCh(TextScreen& s
 	ptr = chan.ptr;
 	wr1 = GetWR1(chan);
 	wr3 = GetCR3(chan);
-	wr4 = chan.cr4;
+	wr4 = GetCR4(chan);
 	wr5 = GetCR5(chan);
+	wr6 = chan.cr6;
+	wr7 = chan.cr7;
 	wr10 = chan.wr10;
 	wr11 = chan.wr11;
 	tc   = chan.tc;
@@ -792,6 +806,7 @@ SCCDevice::MonitorUpdateCh(TextScreen& s
 	// Channel A: Serial Console                          DataAddr    $000000
 	// WR0: $xx CRC=x     CMD=x          PTR=x            CtrlAddr    $000000
 	// WR1: $xx WE   0    WR   RXInt=x   0    TXEn ESEn
+	// WR13/WR12: $001f (196000bps)       WR7/WR6:$1234
 
 	x = xbase;
 	y = ybase;
@@ -805,7 +820,8 @@ SCCDevice::MonitorUpdateCh(TextScreen& s
 	screen.Print(x, y++, "WR11:$%02x", wr11);
 	screen.Print(x, y++, "WR14:$%02x", wr14);
 	screen.Print(x, y++, "WR15:$%02x", wr15);
-	screen.Print(x, y++, "WR12/WR13:$%04x", tc);
+	screen.Print(x, y,   "WR13/WR12:$%04x (%.1fbps)", tc, chan.baudrate);
+	screen.Print(x + 35, y++, "WR7/WR6:$%02x%02x", wr7, wr6);
 	screen.Print(x, y++, "RR0: $%02x", rr0);
 	screen.Print(x, y++, "RR1: $%02x", rr1);
 	screen.Print(x, y++, "RR10:$%02x", rr10);
@@ -944,14 +960,14 @@ SCCDevice::MonitorUpdateCh(TextScreen& s
 	y++;
 
 	// 右列
-	y = ybase;
+	y = ybase + 1;
 	x = xbase + 51;
-	screen.Print(x, y++, "DataAddr    $%06x", chan.dataaddr);
-	screen.Print(x, y++, "CtrlAddr    $%06x", chan.ctrladdr);
+	screen.Print(x, y++, "DataAddr:   $%06x", chan.dataaddr);
+	screen.Print(x, y++, "CtrlAddr:   $%06x", chan.ctrladdr);
 	y++;
-	screen.Print(x, y++, "Param  %12s", GetParamStr(chan).c_str());
-	screen.Print(x, y++, "Rx Bits/Frame    %2d", chan.rxbits);
-	screen.Print(x, y++, "Tx Bits/Frame    %2d", chan.txbits);
+	screen.Print(x, y++, "Param: %12s", GetParamStr(chan).c_str());
+	screen.Print(x, y++, "Rx Bits/Frame:   %2d", chan.rxframebits);
+	screen.Print(x, y++, "Tx Bits/Frame:   %2d", chan.txframebits);
 }
 
 // 内部の送信データクロックの設定
@@ -960,7 +976,8 @@ SCCDevice::SetXC(MPSCCChan& chan)
 {
 	// 5MHz = 200nsec
 	// 12bit = 2.4usec
-	xc12_ns = (2 * (chan.tc + 2)) * 2.4_usec;
+	chan.xc12_ns = (2 * (chan.tc + 2)) * 2.4_usec;
+	ChangeBaudrate(chan);
 }
 
 // 割り込みアクノリッジ