| Game status buffer

80A0: Room tiles

Initialised upon entry to a room by the routine at 8912.
80A0 | DEFS $09 | Background tile (used by the routines at 8D33, 8DC0, 8DD3 and 961E, and also by the unused routine at 93BB)
80A9 | DEFS $09 | Floor tile (used by the routines at 8D33 and 8DC0)
80B2 | DEFS $09 | Wall tile (used by the routines at 8D33, 8DC0, 8DD3 and 8FBC)
80BB | DEFS $09 | Nasty tile (used by the routines at 8D33, 8DC0, 8DD3 and 961E)
80C4 | DEFS $09 | Ramp tile (used by the routines at 8D33, 8D6B, 8FBC and 95C8)
80CD | DEFS $09 | Conveyor tile (used by the routines at 8D33, 8D6B and 8ED4)