utils: add parameter for sdcard image file for createimg command

examples: add more benchmark results, other small changes

examples/pictviewer.pas

@@ -0,0 +1,45 @@
+program pictviewer;
+type PictData = record
+		magic, mode:integer;
+		palette: array [0..15] of integer;
+		pixeldata: array [0..31999] of integer;
+	end;
+
+
+var pic:PictData;
+    filename:string;
+    infile:file;
+    ch:char;
+
+procedure loadPalette(var pic:PictData);
+var i:integer;
+begin
+	for i := 0 to 15 do
+		setpalette(i, pic.palette[i]);
+end;
+
+procedure loadPic(var pic:PictData);
+begin
+	PutScreen(pic.pixeldata);
+end;
+
+begin
+	if ParamCount > 0 then
+		filename := ParamStr(1)
+	else
+	begin
+		write('Filename> ');
+		readln(filename);
+	end;
+
+	open(infile, filename, ModeReadonly);
+	read(infile, pic);
+	close(infile);
+
+	writeln('magic: ', pic.magic, ' mode:', pic.mode);
+
+	loadPalette(pic);
+	loadPic(pic);
+	write('Press any key...');
+	read(ch);
+end.