Expose the ApplyTiles subroutine

src/GTE.s

@@ -46,6 +46,7 @@ GetTileAddr        EXT
 
 PushDirtyTile      EXT    ; A = address from GetTileStoreOffset, marks as dirty (will not mark the same tile more than once)
 PopDirtyTile       EXT    ; No args, returns Y with tile store offset of the dirty tile
+ApplyTiles         EXT    ; Drain the dirty tile queue and call RenderTile on each
 RenderTile         EXT    ; Y = address from GetTileStoreOffset
 GetTileStoreOffset EXT    ; X = column, Y = row
 TileStore          EXT    ; Tile store internal data structure

src/blitter/Tiles.s

@@ -698,6 +698,14 @@ _PopDirtyTile2                                       ; alternate entry point
                  rts
 
 ; Run through the dirty tile list and render them into the code field
+ApplyTiles       ENT
+                 phb
+                 phk
+                 plb
+                 jsr  _ApplyTiles
+                 plb
+                 rtl
+
 _ApplyTiles
                  bra  :begin