--- nono/vm/upd7201.cpp	2026/04/29 17:04:36	1.1.1.3
+++ nono/vm/upd7201.cpp	2026/04/29 17:04:39	1.1.1.4
@@ -9,7 +9,7 @@
 // コンストラクタ
 uPD7201Device::uPD7201Device()
 {
-	monitor.Init(48, 19);
+	monitor_size = nnSize(48, 19);
 	cr.chan[0].id = 0;
 	cr.chan[0].name = "A";
 	cr.chan[1].id = 1;
@@ -429,21 +429,21 @@ uPD7201Device::Rx(int ch, uint32 data)
 }
 
 // モニター
-bool
-uPD7201Device::MonitorUpdate()
+void
+uPD7201Device::MonitorUpdate(TextScreen& monitor)
 {
 	monitor.Clear();
 	for (int i = 0; i < 2; i++) {
 		int x = 0;
 		int y = i * 10;
-		MonitorUpdateCh(i, x, y);
+		MonitorUpdateCh(monitor, i, x, y);
 	}
-	return true;
 }
 
 // モニター (1チャンネル)
 void
-uPD7201Device::MonitorUpdateCh(int ch, int xbase, int ybase)
+uPD7201Device::MonitorUpdateCh(TextScreen& monitor,
+	int ch, int xbase, int ybase)
 {
 	struct SIO::channel *chan = &cr.chan[ch];
 	uint cr0;
@@ -515,7 +515,7 @@ uPD7201Device::MonitorUpdateCh(int ch, i
 	static const char * const cr1_str[] = {
 		"WaEn", "----", "WaRx", "", "", "----", "TxIE", "ESEn"
 	};
-	MonitorReg(x + 9, y, cr1, cr1_str);
+	MonitorReg(monitor, x + 9, y, cr1, cr1_str);
 	monitor.Print(x + 24, y, "RXInt=%d", (cr1 >> 3) & 3);
 	y++;
 
@@ -523,7 +523,7 @@ uPD7201Device::MonitorUpdateCh(int ch, i
 	static const char * const cr3_str[] = {
 		"", "", "AuEn", "----", "----", "----", "----", "RXEn"
 	};
-	MonitorReg(x + 9, y, cr3, cr3_str);
+	MonitorReg(monitor, x + 9, y, cr3, cr3_str);
 	monitor.Print(x + 9, y, "RXbits=%d", 5 + ((cr3 >> 6) & 3));
 	y++;
 
@@ -531,7 +531,7 @@ uPD7201Device::MonitorUpdateCh(int ch, i
 	static const char * const cr4_str[] = {
 		"", "", "", "", "", "", "PaEv", "PaEn"
 	};
-	MonitorReg(x + 9, y, cr4, cr4_str);
+	MonitorReg(monitor, x + 9, y, cr4, cr4_str);
 
 	static const char * const clkrate_str[] = {
 		"1", "16", "32", "64"
@@ -551,7 +551,7 @@ uPD7201Device::MonitorUpdateCh(int ch, i
 	static const char * const cr5_str[] = {
 		"DTR", "", "", "SBrk", "TXEn", "CRC", "!RTS", "TCEn"
 	};
-	MonitorReg(x + 9, y, cr5, cr5_str);
+	MonitorReg(monitor, x + 9, y, cr5, cr5_str);
 	monitor.Print(x + 14, y, "TXbits=%d", 5 + ((cr5 >> 5) & 3));
 	y++;
 
@@ -559,21 +559,22 @@ uPD7201Device::MonitorUpdateCh(int ch, i
 	static const char * const sr0_str[] = {
 		"BrAb", "TxUn", "CTS", "SYNC", "DCD", "TxEm", "IntP", "RxAv"
 	};
-	MonitorReg(x + 9, y, sr0, sr0_str);
+	MonitorReg(monitor, x + 9, y, sr0, sr0_str);
 	y++;
 
 	// SR1
 	static const char * const sr1_str[] = {
 		"EOF", "CRCE", "RxOv", "PaEr", "", "", "", "Sent"
 	};
-	MonitorReg(x + 9, y, sr1, sr1_str);
+	MonitorReg(monitor, x + 9, y, sr1, sr1_str);
 	monitor.Print(x + 29, y, "ResidueCode=%d", (sr1 >> 1) & 7);
 	y++;
 }
 
 // レジスタをビットごとに表示する。MonitorUpdate の下請け。
 void
-uPD7201Device::MonitorReg(int x, int y, uint32 reg, const char * const *names)
+uPD7201Device::MonitorReg(TextScreen& monitor,
+	int x, int y, uint32 reg, const char * const *names)
 {
 	for (int i = 0; i < 8; i++) {
 		if (strcmp(names[i], "----") == 0) {