--- hatari/src/convert/spec640x16.c	2019/04/01 07:14:21	1.1.1.6
+++ hatari/src/convert/spec640x16.c	2019/04/09 08:48:56	1.1.1.8
@@ -13,9 +13,14 @@ static void ConvertSpec512_640x16Bit(voi
 	Uint32 *edi, *ebp;
 	Uint32 *esi;
 	Uint32 eax, ebx, ecx, edx;
-	Uint32 pixelspace[4]; /* Workspace to store pixels to so can print in right order for Spec512 */
+	Uint32 pixelspace[5]; /* Workspace to store pixels to so can print in right order for Spec512 */
 	int y, x, Screen4BytesPerLine;
 
+	/* on x86, unaligned access macro touches also
+	 * next byte, zero it for code checkers
+	 */
+	pixelspace[4] = 0;
+
 	Spec512_StartFrame();                     /* Start frame, track palettes */
 	Screen4BytesPerLine = PCScreenBytesPerLine / 4;
 	edx = 0;                                  /* Clear index for loop */
@@ -117,5 +122,5 @@ static void ConvertSpec512_640x16Bit(voi
 		pPCScreenDest = (((Uint8 *)pPCScreenDest)+2*PCScreenBytesPerLine);
 	}
 
-	bScreenContentsChanged = TRUE;
+	bScreenContentsChanged = true;
 }