--- nono/vm/spc.cpp	2026/04/29 17:04:36	1.1.1.4
+++ nono/vm/spc.cpp	2026/04/29 17:04:39	1.1.1.5
@@ -37,7 +37,7 @@ SPCDevice::SPCDevice()
 	SetConfigName("spc0");
 	myid = -1;
 
-	monitor.Init(70, 15);
+	monitor_size = nnSize(70, 15);
 
 	// 汎用イベント
 	// 名前とコールバック関数は都度セットする。
@@ -401,8 +401,8 @@ SPCDevice::Peek(uint32 addr)
 	__unreachable();
 }
 
-bool
-SPCDevice::MonitorUpdate()
+void
+SPCDevice::MonitorUpdate(TextScreen& monitor)
 {
 	int x;
 	int y;
@@ -461,14 +461,14 @@ SPCDevice::MonitorUpdate()
 	static const char * const sctl_bits[] = {
 		"RST", "CTRL", "DIAG", "ARB", "PARI", "SEL", "RESL", "INTR"
 	};
-	MonitorReg(x, y, sctl, sctl_bits);
+	MonitorReg(monitor, x, y, sctl, sctl_bits);
 	y++;
 
 	// SCMD
 	static const char * const scmd_bits[] = {
 		"", "", "", "RST", "INTC", "PROG", "", "TERM"
 	};
-	MonitorReg(x, y, scmd, scmd_bits);
+	MonitorReg(monitor, x, y, scmd, scmd_bits);
 	static const char * const scmd_cmd[] = {
 		//12345678901234
 		"(Bus Release)",
@@ -487,28 +487,28 @@ SPCDevice::MonitorUpdate()
 	static const char * const ints_bits[] = {
 		"Sel", "Resl", "Disc", "Cmpl", "SReq", "TOut", "HErr", "Rst"
 	};
-	MonitorReg(x, y, ints, ints_bits);
+	MonitorReg(monitor, x, y, ints, ints_bits);
 	y++;
 
 	// PSNS
 	static const char * const psns_bits[] = {
 		"REQ", "ACK", "ATN", "SEL", "BSY", "MSG", "C/D", "I/O"
 	};
-	MonitorReg(x, y, psns, psns_bits);
+	MonitorReg(monitor, x, y, psns, psns_bits);
 	y++;
 
 	// SDGC
 	static const char * const sdgc_bits[] = {
 		"",    "",    "XfEn", "",   "",    "",    "",    ""
 	};
-	MonitorReg(x, y, sdgc, sdgc_bits);
+	MonitorReg(monitor, x, y, sdgc, sdgc_bits);
 	y++;
 
 	// SSTS
 	static const char * const ssts_bits[] = {
 		"", "", "SBSY", "XInP", "RSTI", "TCZ", "Full", "Empt"
 	};
-	MonitorReg(x, y, ssts, ssts_bits);
+	MonitorReg(monitor, x, y, ssts, ssts_bits);
 	static const char * const ssts_conn[] = {
 		//12345678
 		"(NotConn)",
@@ -523,14 +523,14 @@ SPCDevice::MonitorUpdate()
 	static const char * const serr_bits[] = {
 		"", "", "XOut", "", "PErr", "", "Shrt", ""
 	};
-	MonitorReg(x, y, serr, serr_bits);
+	MonitorReg(monitor, x, y, serr, serr_bits);
 	y++;
 
 	// PCTL
 	static const char * const pctl_bits[] = {
 		"BIE", "", "", "", "", "MSG", "C/D", "I/O"
 	};
-	MonitorReg(x, y, pctl, pctl_bits);
+	MonitorReg(monitor, x, y, pctl, pctl_bits);
 	y++;
 
 	// バス状態
@@ -620,13 +620,12 @@ SPCDevice::MonitorUpdate()
 			}
 		}
 	}
-
-	return true;
 }
 
 // レジスタをビットごとに表示する。MonitorUpdate の下請け。
 void
-SPCDevice::MonitorReg(int x, int y, uint32 reg, const char * const *names)
+SPCDevice::MonitorReg(TextScreen& monitor,
+	int x, int y, uint32 reg, const char * const *names)
 {
 	for (int i = 0; i < 8; i++) {
 		bool b = reg & (1 << (7 - i));