--- nono/vm/dmac.cpp	2026/04/29 17:04:55	1.1.1.8
+++ nono/vm/dmac.cpp	2026/04/29 17:04:58	1.1.1.9
@@ -26,7 +26,7 @@ DMACDevice::DMACDevice()
 	dmac.chan[2].desc = "User";
 	dmac.chan[3].desc = "ADPCM";
 
-	for (int i = 0; i < countof(event); i++) {
+	for (int i = 0; i < event.size(); i++) {
 		event[i].dev = this;
 		event[i].func = (DeviceCallback_t)&DMACDevice::Transfer;
 		event[i].SetName(string_format("DMAC #%d", i));
@@ -69,8 +69,8 @@ DMACDevice::ResetHard()
 	}
 
 	// イベントをすべて停止
-	for (int i = 0; i < countof(event); i++) {
-		event[i].Stop();
+	for (auto& ev : event) {
+		ev.Stop();
 	}
 }
 
@@ -564,7 +564,7 @@ DMACDevice::MonitorUpdate(Monitor *, Tex
 		val = chan->PeekCSR();
 		screen.Print(x, y++, "$%02x", val);
 		static const char * const csrname[] = {
-			"COC", "BTC", "NDT", "ERR", "ACT", "---", "PCT", "PCS",
+			"COC", "BTC", "NDT", "ERR", "ACT", "-", "PCT", "PCS",
 		};
 		MonitorReg4(screen, x, y++, val >> 4,   &csrname[0]);
 		MonitorReg4(screen, x, y++, val & 0xff, &csrname[4]);
@@ -676,7 +676,7 @@ DMACDevice::MonitorUpdate(Monitor *, Tex
 		val = chan->ccr;
 		screen.Print(x, y++, "$%02x", val);
 		static const char * const ccrnames[] = {
-			"STR", "CNT", "HLT", "SAB", "INT", "---", "---", "---",
+			"STR", "CNT", "HLT", "SAB", "INT", "-", "-", "-",
 		};
 		MonitorReg4(screen, x, y++, (val >> 4),   &ccrnames[0]);
 		MonitorReg4(screen, x, y++, (val & 0xff), &ccrnames[4]);
@@ -731,8 +731,12 @@ DMACDevice::MonitorReg4(TextScreen& scre
 	int x, int y, uint32 reg, const char * const *names)
 {
 	for (int i = 0; i < 4; i++) {
-		bool b = reg & (1 << (3 - i));
-		screen.Puts(x + i * 4, y, TA::OnOff(b), names[i]);
+		if (names[i][0] == '-') {
+			screen.Puts(x + i * 4, y, TA::Disable, "---");
+		} else {
+			bool b = reg & (1 << (3 - i));
+			screen.Puts(x + i * 4, y, TA::OnOff(b), names[i]);
+		}
 	}
 }