--- nono/m680x0/m680x0.h	2026/04/29 17:05:30	1.1
+++ nono/m680x0/m680x0.h	2026/04/29 17:05:48	1.1.1.2
@@ -127,11 +127,11 @@ struct M68030
 {
 	// SSW
 	static constexpr uint32 SSW_SIZE(uint32 x) { return ((x) & 0x03) << 4; }
-	static const uint32 SSW_SIZE_LONG	= (0 << 4);
-	static const uint32 SSW_SIZE_BYTE	= (1 << 4);
-	static const uint32 SSW_SIZE_WORD	= (2 << 4);
-	static const uint32 SSW_SIZE_3BYTES	= (3 << 4);
-	static const uint32 SSW_SIZE_MASK	= (0x03 << 4);
+	static const uint32 SSW_SIZE_LONG	= (0U << 4);
+	static const uint32 SSW_SIZE_BYTE	= (1U << 4);
+	static const uint32 SSW_SIZE_WORD	= (2U << 4);
+	static const uint32 SSW_SIZE_3BYTES	= (3U << 4);
+	static const uint32 SSW_SIZE_MASK	= (0x03U << 4);
 
 	static const uint32 SSW_FC_MASK		= 0x0007;	// FC_*
 	static const uint32 SSW_RW			= 0x0040;	// SSW_BUS_{R,W}
@@ -166,7 +166,7 @@ struct M68040
 	// SSW
 	static const uint32 SSW_TM_MASK		= 0x0007;
 	static const uint32 SSW_TT_MASK		= 0x0018;
-	static const uint32 SSW_SIZE_MASK	= 0x0060;	// (0x03 << 5)
+	static const uint32 SSW_SIZE_MASK	= 0x0060;	// (0x03U << 5)
 	static const uint32 SSW_RW			= 0x0100;
 	static const uint32 SSW_LK			= 0x0200;
 	static const uint32 SSW_ATC			= 0x0400;
@@ -176,10 +176,10 @@ struct M68040
 	static const uint32 SSW_CU			= 0x4000;
 	static const uint32 SSW_CP			= 0x8000;
 
-	static const uint32 SSW_SIZE_LONG	= (0x00 << 5);
-	static const uint32 SSW_SIZE_BYTE	= (0x01 << 5);
-	static const uint32 SSW_SIZE_WORD	= (0x02 << 5);
-	static const uint32 SSW_SIZE_LINE	= (0x03 << 5);
+	static const uint32 SSW_SIZE_LONG	= (0x00U << 5);
+	static const uint32 SSW_SIZE_BYTE	= (0x01U << 5);
+	static const uint32 SSW_SIZE_WORD	= (0x02U << 5);
+	static const uint32 SSW_SIZE_LINE	= (0x03U << 5);
 	// バイトサイズから SSW_SIZE フィールドを作成する。1, 2, 4 バイトのみ。
 	static constexpr uint32 SSW_SIZE(uint32 x) { return ((x) & 0x03) << 5; }