--- nono/vm/scc.cpp	2026/04/29 17:04:28	1.1
+++ nono/vm/scc.cpp	2026/04/29 17:04:32	1.1.1.2
@@ -16,12 +16,17 @@
 // SIODevice           SCCDevice
 // (LUNA, uPD7201)     (X68030, Z8530)
 
+std::unique_ptr<SCCDevice> gSCC;
+
 SCCDevice::SCCDevice()
 {
 	logname = "scc";
 	devname = "SCC";
 	devaddr = baseaddr;
 	devlen  = 0x2000;
+
+	cr.chan[0].desc = "Serial Port";
+	cr.chan[1].desc = "Mouse";
 }
 
 SCCDevice::~SCCDevice()
@@ -37,12 +42,18 @@ SCCDevice::ResetHard()
 	Reset();
 }
 
+// アドレスデコーダ
+inline uint64
+SCCDevice::Decoder(uint32 addr) const
+{
+	// 折り返しは?
+	return addr - devaddr;
+}
+
 uint64
 SCCDevice::Read8(uint32 addr)
 {
-	uint32 an = addr - devaddr;
-
-	switch (an) {
+	switch (Decoder(addr)) {
 	 case 1:	// $E98001
 		return ReadCtrl(&cr.chan[1]);
 
@@ -56,7 +67,7 @@ SCCDevice::Read8(uint32 addr)
 
 	 case 7:	// $E98007
 		putlog(0, "ChA データレジスタ読み込み (未実装)");
-		return ReadData(0);
+		return ReadData(&cr.chan[0]);
 
 	 default:
 		break;
@@ -74,9 +85,7 @@ SCCDevice::Read16(uint32 addr)
 uint64
 SCCDevice::Write8(uint32 addr, uint32 data)
 {
-	uint32 an = addr - devaddr;
-
-	switch (an) {
+	switch (Decoder(addr)) {
 	 case 1:	// $E98001
 		WriteCtrl(&cr.chan[1], data);
 		return 0;
@@ -109,8 +118,24 @@ SCCDevice::Write16(uint32 addr, uint32 d
 uint64
 SCCDevice::Peek8(uint32 addr)
 {
-	// XXX
-	return 0xff;
+	switch (Decoder(addr)) {
+	 case 1:	// $E98001
+		return PeekCtrl(&cr.chan[1]);
+
+	 case 3:	// $E98003
+		// マウス非接続は 0x00 ?
+		return 0x00;
+
+	 case 5:	// $E98005
+		return PeekCtrl(&cr.chan[0]);
+
+	 case 7:	// $E98007
+		return PeekData(&cr.chan[0]);
+
+	 default:
+		// 未調査
+		return 0xff;
+	}
 }
 
 // Z8530 制御ポート読み込み
@@ -248,5 +273,5 @@ void
 SCCDevice::Interrupt()
 {
 	putlog(0, "割り込み(未実装)");
-	gMPU->Interrupt(5, 0x50/*XXX*/);
+	gMPU680x0->Interrupt(5, 0x50/*XXX*/);
 }