--- nono/vm/syncer.cpp	2026/04/29 17:05:28	1.1.1.3
+++ nono/vm/syncer.cpp	2026/04/29 17:05:37	1.1.1.5
@@ -10,6 +10,7 @@
 
 #include "syncer.h"
 #include "config.h"
+#include "monitor.h"
 #include "mpu680x0.h"
 #include "scheduler.h"
 
@@ -42,14 +43,11 @@ 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();
@@ -109,7 +107,23 @@ 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);
 }
@@ -131,9 +145,9 @@ 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);
@@ -146,9 +160,9 @@ 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);
@@ -161,9 +175,9 @@ 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);
@@ -177,16 +191,16 @@ 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)
@@ -372,25 +386,25 @@ Syncer::MonitorUpdateSub(TextScreen& scr
 	int y = 0;
 
 	screen.Print(0, y, "Mode: 0x%04x (", mode);
-	switch (mode & SCHED_CPU_MASK) {
-	 case SCHED_CPU_NORMAL:
+	switch (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 ((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((mode & SYNCMODE_BOOT)), "Boot");
+	screen.Puts(29, y, TA::OnOff((mode & SYNCMODE_KEY)), "Key");
+	screen.Puts(34, y, TA::OnOff((mode & SYNCMODE_POWEROFF)), "POff");
 	screen.Puts(38, y, ")");
 	y++;
 	uint64 rt = rtime;