--- nono/vm/scc.cpp	2026/04/29 17:04:36	1.1.1.3
+++ nono/vm/scc.cpp	2026/04/29 17:04:45	1.1.1.5
@@ -5,7 +5,8 @@
 //
 
 #include "scc.h"
-#include "mpu680x0.h"
+#include "interrupt.h"
+#include "mpu.h"
 
 //          IODevice
 //              |
@@ -46,6 +47,8 @@ SCCDevice::ResetHard()
 uint64
 SCCDevice::Read(uint32 addr)
 {
+	gMPU->AddCycle(41);	// InsideOut p.135
+
 	switch (addr) {
 	 case 0:	// $E98001
 		return ReadCtrl(&cr.chan[1]);
@@ -68,6 +71,8 @@ SCCDevice::Read(uint32 addr)
 uint64
 SCCDevice::Write(uint32 addr, uint32 data)
 {
+	gMPU->AddCycle(49);	// InsideOut p.135
+
 	switch (addr) {
 	 case 0:	// $E98001
 		WriteCtrl(&cr.chan[1], data);
@@ -196,6 +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;
@@ -243,5 +255,12 @@ void
 SCCDevice::Interrupt()
 {
 	putlog(0, "割り込み(未実装)");
-	gMPU680x0->Interrupt(this, 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 */
 }