From e7f234f55b1998c899c60a3796ea1e0a6c3446b8 Mon Sep 17 00:00:00 2001
From: Andrew Alderwick <andrew@alderwick.co.uk>
Date: Wed, 21 Apr 2021 21:01:50 +0100
Subject: [PATCH] Reinstated check for labels in zero page

---
 projects/examples/gui.animation.usm | 2 +-
 src/assembler.c                     | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/projects/examples/gui.animation.usm b/projects/examples/gui.animation.usm
index 5f22138..9f2b988 100644
--- a/projects/examples/gui.animation.usm
+++ b/projects/examples/gui.animation.usm
@@ -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 ]
 
diff --git a/src/assembler.c b/src/assembler.c
index 9e9af37..645e98e 100644
--- a/src/assembler.c
+++ b/src/assembler.c
@@ -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))) {