#define TileMap(changeID,Xcoordinate,Ycoordinate,Length,Height,offset) "CODE changeID Xcoordinate Ycoordinate Length Height 0x00 0x00 0x00 offset"

org 0xC9C9CC+(4*0x??)

POIN TileChanges

org OffsetOfTileChanges

TileChanges:
TileMap(TileChangeID,StartingX,StartingY,Length,Height,PointerToCode)
CODE $FF
CODE $00
CODE $00