--- nono/vm/syncer.cpp	2026/04/29 17:05:33	1.1.1.4
+++ nono/vm/syncer.cpp	2026/04/29 17:05:42	1.1.1.6
@@ -43,19 +43,28 @@ Syncer::~Syncer()
 bool
 Syncer::Init()
 {
-	if (inherited::Init() == false) {
-		return false;
-	}
-
 	mpu680x0 = dynamic_cast<MPU680x0Device *>(mpu);
 
-	mode = SCHED_POWEROFF;
+	mode = SYNCMODE_POWEROFF;
 	overslept = 0;
+	dmac_idle = 1;
 
 	// 高速モード指定
 	bool fast_mode = gConfig->Find("fast-mode").AsInt();
 	RequestFullSpeed(fast_mode);
 
+	// クロックの同期方法
+	const ConfigItem& sync_item = gConfig->Find("clock-sync");
+	auto clock_sync = sync_item.AsString();
+	if (clock_sync == "real") {
+		sync_realtime = true;
+	} else if (clock_sync == "virtual") {
+		sync_realtime = false;
+	} else {
+		sync_item.Err();
+		return false;
+	}
+
 	scheduler->ConnectMessage(MessageID::SCHEDULER_SYNCMODE, this,
 		ToMessageCallback(&Syncer::ChangeModeMessage));
 
@@ -110,7 +119,23 @@ Syncer::RequestCPUMode(uint32 cpumode)
 {
 	uint32 newmode;
 
-	newmode = (mode & ~SCHED_CPU_MASK) | cpumode;
+	halt     = cpumode & SYNCMODE_CPU_HALT;
+	cpu_idle = cpumode & SYNCMODE_CPU_STOP;
+
+	newmode = (mode & ~SYNCMODE_CPU_MASK) | halt | (cpu_idle & dmac_idle);
+
+	ChangeMode(newmode);
+}
+
+// DMAC のアクティブ状態を指示する。
+void
+Syncer::RequestDMACActive(bool active)
+{
+	uint32 newmode;
+
+	dmac_idle = active ? 0 : SYNCMODE_IDLE;
+
+	newmode = (mode & ~SYNCMODE_IDLE) | (cpu_idle & dmac_idle);
 
 	ChangeMode(newmode);
 }
@@ -132,9 +157,9 @@ Syncer::RequestBootPageMode(bool isrom)
 	uint32 newmode;
 
 	if (isrom) {
-		newmode = mode | SCHED_BOOT;
+		newmode = mode | SYNCMODE_BOOT;
 	} else {
-		newmode = mode & ~SCHED_BOOT;
+		newmode = mode & ~SYNCMODE_BOOT;
 	}
 
 	ChangeMode(newmode);
@@ -147,9 +172,9 @@ Syncer::RequestKeyPressed(bool pressed)
 	uint32 newmode;
 
 	if (pressed) {
-		newmode = mode | SCHED_KEY;
+		newmode = mode | SYNCMODE_KEY;
 	} else {
-		newmode = mode & ~SCHED_KEY;
+		newmode = mode & ~SYNCMODE_KEY;
 	}
 
 	ChangeMode(newmode);
@@ -162,9 +187,9 @@ Syncer::RequestPowerOffMode(bool powerof
 	uint32 newmode;
 
 	if (poweroff) {
-		newmode = mode | SCHED_POWEROFF;
+		newmode = mode | SYNCMODE_POWEROFF;
 	} else {
-		newmode = mode & ~SCHED_POWEROFF;
+		newmode = mode & ~SYNCMODE_POWEROFF;
 	}
 
 	ChangeMode(newmode);
@@ -178,16 +203,16 @@ Syncer::ChangeModeMessage(MessageID msgi
 
 	if (msgid == MessageID::SCHEDULER_SYNCMODE) {
 		if (arg) {
-			newmode = mode & ~SCHED_SYNC;
+			newmode = mode & ~SYNCMODE_SYNC;
 		} else {
-			newmode = mode | SCHED_SYNC;
+			newmode = mode | SYNCMODE_SYNC;
 		}
 
 		ChangeMode(newmode);
 	}
 }
 
-// メンバ変数 mode_request に従ってスケジューラの動作状態を変更。
+// newmode に従ってスケジューラの動作状態を変更。
 // 自スレッドから呼ぶこと。
 void
 Syncer::ChangeMode(uint32 newmode)
@@ -368,52 +393,56 @@ Syncer::PutlogRealtime()
 
 // モニタ更新の下請け (Scheduler から呼ばれる)
 int
-Syncer::MonitorUpdateSub(TextScreen& screen, uint64 vtime)
+Syncer::MonitorUpdateSub(TextScreen& screen, uint64 tmp_vtime)
 {
 	int y = 0;
 
-	screen.Print(0, y, "Mode: 0x%04x (", mode);
-	switch (mode & SCHED_CPU_MASK) {
-	 case SCHED_CPU_NORMAL:
+	// 一応ローカルコピー。
+	uint32 tmp_mode = mode;
+	uint64 tmp_rtime = rtime;
+	uint64 sync_rt_delta = tmp_rtime - rtime_epoch;
+	uint64 sync_vt_delta = tmp_vtime - vtime_epoch;
+
+	screen.Print(0, y, "Mode: 0x%04x (", tmp_mode);
+	switch (tmp_mode & SYNCMODE_CPU_MASK) {
+	 case SYNCMODE_CPU_NORMAL:
 		screen.Puts(14, y, TA::Off, "Run");
 		break;
-	 case SCHED_CPU_STOP:
+	 case SYNCMODE_CPU_STOP:
 		screen.Puts(14, y, TA::On, "STOP");
 		break;
-	 case SCHED_CPU_HALT:
+	 case SYNCMODE_CPU_HALT:
 		screen.Puts(14, y, TA::On, "HALT");
 		break;
 	}
-	if ((mode & SCHED_SYNC)) {
+	if ((tmp_mode & SYNCMODE_SYNC)) {
 		screen.Puts(19, y, TA::On, "Sync");
 	} else {
 		screen.Puts(19, y, TA::Off, "Full");
 	}
-	screen.Puts(24, y, TA::OnOff((mode & SCHED_BOOT)), "Boot");
-	screen.Puts(29, y, TA::OnOff((mode & SCHED_KEY)), "Key");
-	screen.Puts(34, y, TA::OnOff((mode & SCHED_POWEROFF)), "POff");
+	screen.Puts(24, y, TA::OnOff((tmp_mode & SYNCMODE_BOOT)), "Boot");
+	screen.Puts(29, y, TA::OnOff((tmp_mode & SYNCMODE_KEY)), "Key");
+	screen.Puts(34, y, TA::OnOff((tmp_mode & SYNCMODE_POWEROFF)), "POff");
 	screen.Puts(38, y, ")");
 	y++;
-	uint64 rt = rtime;
-	uint64 vt = vtime;
 
-	auto s_rt = TimeToStr(rt);
-	auto s_vt = TimeToStr(vt);
-	std::string s_sync_rt {};
-	std::string s_sync_vt {};
-	if (mode != 0) {
-		uint64 sync_rt = rtime - rtime_epoch;
-		uint64 sync_vt = vtime - vtime_epoch;
-		s_sync_rt = TimeToStr(sync_rt);
-		s_sync_vt = TimeToStr(sync_vt);
-	}
 	// 日まで表示しようとするときは桁位置を動かす
-	int width = std::max(rt, vt) < 86400_sec ? 20 : 25;
+	int width = std::max(tmp_rtime, tmp_vtime) < 86400_sec ? 20 : 25;
 
-	screen.Print(0, y++, "Total  Real Time: %*s", width, s_rt.c_str());
-	screen.Print(4, y++,     "Virtual Time: %*s", width, s_vt.c_str());
-	screen.Print(0, y++, "Sync   Real Time: %*s", width, s_sync_rt.c_str());
-	screen.Print(4, y++,     "Virtual Time: %*s", width, s_sync_vt.c_str());
+	std::string trt = TimeToStr(tmp_rtime);
+	std::string tvt = TimeToStr(tmp_vtime);
+	//                     012345678901234567
+	screen.Print(0, y++,  "Total  Real Time: %*s", width, trt.c_str());
+	screen.Print(4, y++,      "Virtual Time: %*s", width, tvt.c_str());
+	screen.Puts(0, y + 0, "Sync   Real Time:");
+	screen.Puts(4, y + 1,     "Virtual Time:");
+	if (tmp_mode != 0) {
+		std::string srt = TimeToStr(sync_rt_delta);
+		std::string svt = TimeToStr(sync_vt_delta);
+		screen.Print(18, y + 0, "%*s", width, srt.c_str());
+		screen.Print(18, y + 1, "%*s", width, svt.c_str());
+	}
+	y += 2;
 
 	screen.Puts(0, y, "Rating MPU Speed   :");
 	uint clock_khz = mpu->GetClockSpeed();