@@ -3,7 +3,7 @@

 |00 @System     [ &vector $2 &pad    $6 &r      $2 &g     $2 &b      $2 ]

 |20 @Screen     [ &vector $2 &width  $2 &height $2 &pad   $2 &x      $2 &y $2 &addr $2 &color $1 ]

-|0100

+|0000

 @dvd [ &x $2 &y $2 &dx $1 &dy $1 ]

@@ -233,6 +233,8 @@ parsetoken(char *w)

 	Label *l;

 	Macro *m;

 	if(w[0] == '.' && (l = findlabel(w + 1))) { /* zero-page */

+		if(l->addr > 0xff)

+			return error("Address is not in zero page", w);

 		pushbyte(l->addr, 1);

 		return ++l->refs;

 	} else if(w[0] == ',' && (l = findlabel(w + 1))) {