--- nono/vm/rp5c15.cpp	2026/04/29 17:04:36	1.1.1.3
+++ nono/vm/rp5c15.cpp	2026/04/29 17:04:39	1.1.1.4
@@ -17,7 +17,7 @@ RP5C15Device::RP5C15Device()
 	devname = "RTC";
 	devaddr = 0xe8a000;
 	devlen  = 0x2000;
-	monitor.Init(30, 17);
+	monitor_size = nnSize(30, 17);
 }
 
 RP5C15Device::~RP5C15Device()
@@ -243,8 +243,8 @@ RP5C15Device::Peek(uint32 addr)
 	}
 }
 
-bool
-RP5C15Device::MonitorUpdate()
+void
+RP5C15Device::MonitorUpdate(TextScreen& monitor)
 {
 	int x;
 	int y;
@@ -298,8 +298,6 @@ RP5C15Device::MonitorUpdate()
 	y++;
 
 	monitor.Print(x, y++, "cnt  %2d", rtc.cnt);
-
-	return true;
 }
 
 // 32Hz クロック入力