diff --git a/demos/tf4/Tiles.s b/demos/tf4/Tiles.s
new file mode 100644
index 0000000..6030d7d
--- /dev/null
+++ b/demos/tf4/Tiles.s
@@ -0,0 +1,41 @@
+
+TileData
+; Reserved space (tile 0 is special...
+            ds 128
+; Tile ID 1
+; From image coordinates 0, 0
+            hex   ffffffff
+            hex   ffffffff
+            hex   ffffffff
+            hex   ffffffff
+            hex   ffffffff
+            hex   ffffffff
+            hex   ffffffff
+            hex   ffffffff
+
+            hex   00000000
+            hex   00000000
+            hex   00000000
+            hex   00000000
+            hex   00000000
+            hex   00000000
+            hex   00000000
+            hex   00000000
+
+            hex   ffffffff
+            hex   ffffffff
+            hex   ffffffff
+            hex   ffffffff
+            hex   ffffffff
+            hex   ffffffff
+            hex   ffffffff
+            hex   ffffffff
+
+            hex   00000000
+            hex   00000000
+            hex   00000000
+            hex   00000000
+            hex   00000000
+            hex   00000000
+            hex   00000000
+            hex   00000000
\ No newline at end of file
diff --git a/src/Render.s b/src/Render.s
index 6b76427..289fd7f 100644
--- a/src/Render.s
+++ b/src/Render.s
@@ -56,7 +56,7 @@ _Render
             jsr   _RenderSprites      ; Once the BG0 X and Y positions are committed, update sprite data
 
             jsr   _UpdateBG0TileMap   ; and the tile maps.  These subroutines build up a list of tiles
-            jsr   _UpdateBG1TileMap   ; that need to be updated in the code field
+;            jsr   _UpdateBG1TileMap   ; that need to be updated in the code field
 
             jsr   _ApplyTiles         ; This function actually draws the new tiles into the code field