--- nono/vm/bitmap.h	2026/04/29 17:04:35	1.1.1.3
+++ nono/vm/bitmap.h	2026/04/29 17:04:38	1.1.1.4
@@ -31,7 +31,7 @@ class BitmapDevice
 	uint64 Write16(uint32 addr, uint32 data) override;
 	uint64 Write32(uint32 addr, uint32 data) override;
 	uint64 Peek8(uint32 addr) override;
-	bool MonitorUpdate() override;
+	void MonitorUpdate(TextScreen&) override;
 
 	// プレーン数を取得
 	int GetPlaneCount() const { return nplane; }