Apple GEOS reserves beside the main app area at $4000-$C000 a secondary app area at $0C00-$2000. While it was an elegant idea to use that secondary area for overlays at the end of the day those 5 kB are just too small. So now overlays go at the end of the main area (as with GEOS 64/128).

However the stack (usually 1 kB) can be securely placed in the secondary area without effort from the side of the developer. The rest of the secondary area (usually 4 kB) is made available to the developer as (uninitialized) 'EXTBSS'.

git-svn-id: svn://svn.cc65.org/cc65/trunk@5696 b7a2c559-68d2-44c3-8de9-860c34a00d81

src/grc65/main.c

@@ -828,7 +828,7 @@ static void DoMemory (void)
             stacksize);
     }
 
-    if (overlaysize != -1 && apple == 0) {
+    if (overlaysize != -1) {
         fprintf (outputSFile,
             "\t.export __OVERLAYSIZE__ : absolute = $%04x\n\n",
             overlaysize);