Used by the routine at
25700. Skool region 189 is on the top floor of the boys' skool, anywhere to the left of the left study door (x<=72). It is defined by the first entry in the skool region data table at
46908.
Each entry in this table determines the first staircase endpoint to reach on the way from skool region 189 to the destination region (189-196). Region 191 corresponds to anywhere on the bottom floor (see
47420) or in mid-air (see
46908 and
47164); region 192 is the assembly hall stage (see
28067).