--- nono/vm/scc.cpp	2026/04/29 17:04:32	1.1.1.2
+++ nono/vm/scc.cpp	2026/04/29 17:04:45	1.1.1.5
@@ -1,9 +1,11 @@
 //
 // nono
-// Copyright (C) 2017 isaki@NetBSD.org
+// Copyright (C) 2020 nono project
+// Licensed under nono-license.txt
 //
 
 #include "scc.h"
+#include "interrupt.h"
 #include "mpu.h"
 
 //          IODevice
@@ -42,100 +44,73 @@ 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)
+SCCDevice::Read(uint32 addr)
 {
-	switch (Decoder(addr)) {
-	 case 1:	// $E98001
+	gMPU->AddCycle(41);	// InsideOut p.135
+
+	switch (addr) {
+	 case 0:	// $E98001
 		return ReadCtrl(&cr.chan[1]);
 
-	 case 3:	// $E98003
+	 case 1:	// $E98003
 		// マウス非接続は 0x00 ?
 		putlog(0, "ChB データレジスタ読み込み (未実装)");
 		return 0x00;
 
-	 case 5:	// $E98005
+	 case 2:	// $E98005
 		return ReadCtrl(&cr.chan[0]);
 
-	 case 7:	// $E98007
+	 case 3:	// $E98007
 		putlog(0, "ChA データレジスタ読み込み (未実装)");
 		return ReadData(&cr.chan[0]);
-
-	 default:
-		break;
 	}
-	putlog(0, "未実装レジスタ読み込み");
-	return (uint64)-1;
+	__unreachable();
 }
 
 uint64
-SCCDevice::Read16(uint32 addr)
+SCCDevice::Write(uint32 addr, uint32 data)
 {
-	return 0xff00 | Read8(addr + 1);
-}
+	gMPU->AddCycle(49);	// InsideOut p.135
 
-uint64
-SCCDevice::Write8(uint32 addr, uint32 data)
-{
-	switch (Decoder(addr)) {
-	 case 1:	// $E98001
+	switch (addr) {
+	 case 0:	// $E98001
 		WriteCtrl(&cr.chan[1], data);
 		return 0;
 
-	 case 3:	// $E98003
+	 case 1:	// $E98003
 		WriteData(&cr.chan[1], data);
 		return 0;
 
-	 case 5:	// $E98005
+	 case 2:	// $E98005
 		WriteCtrl(&cr.chan[0], data);
 		return 0;
 
-	 case 7:	// $E98007
+	 case 3:	// $E98007
 		WriteData(&cr.chan[0], data);
 		return 0;
-
-	 default:
-		break;
 	}
-	putlog(0, "未実装レジスタ書き込み");
-	return (uint64)-1;
+	__unreachable();
 }
 
 uint64
-SCCDevice::Write16(uint32 addr, uint32 data)
+SCCDevice::Peek(uint32 addr)
 {
-	return Write8(addr + 1, data);
-}
-
-uint64
-SCCDevice::Peek8(uint32 addr)
-{
-	switch (Decoder(addr)) {
-	 case 1:	// $E98001
+	switch (addr) {
+	 case 0:	// $E98001
 		return PeekCtrl(&cr.chan[1]);
 
-	 case 3:	// $E98003
+	 case 1:	// $E98003
 		// マウス非接続は 0x00 ?
 		return 0x00;
 
-	 case 5:	// $E98005
+	 case 2:	// $E98005
 		return PeekCtrl(&cr.chan[0]);
 
-	 case 7:	// $E98007
+	 case 3:	// $E98007
 		return PeekData(&cr.chan[0]);
-
-	 default:
-		// 未調査
-		return 0xff;
 	}
+	__unreachable();
 }
 
 // Z8530 制御ポート読み込み
@@ -226,6 +201,13 @@ SCCDevice::WriteCtrl(struct SIO::channel
 		chan->ptr = 0;
 		break;
 
+	 case 10:	// WR10
+		putlog(2, "WR%d%s <- $%02x (未実装)", chan->ptr, chan->name, data);
+		chan->wr10 = data;
+		// アクセス後は WR0 へ戻す
+		chan->ptr = 0;
+		break;
+
 	 case 11:	// WR11
 		putlog(2, "WR%d%s <- $%02x (未実装)", chan->ptr, chan->name, data);
 		chan->wr11 = data;
@@ -273,5 +255,12 @@ void
 SCCDevice::Interrupt()
 {
 	putlog(0, "割り込み(未実装)");
-	gMPU680x0->Interrupt(5, 0x50/*XXX*/);
+//	gInterrupt->Raise(this);
+}
+
+// 割り込みアクノリッジ
+int
+SCCDevice::InterruptAcknowledge()
+{
+	return 0x50;	/* XXX 実際は WR2 とか要因で変わる */
 }