Used by the routine at ADJ_FOR_OUT_OF_BOUNDS.

ADJ_DU_FOR_OBJ_INTERSECT for Z, done before U and V so it tests the object where it stands: an object has to overlap in U and in V to be above or below it. Stopping sets bit 2 of +$0C, whether the move was up or down, and harm passes as in U.

Pentagram does more here than Knight Lore. Bit 7 of +$17 is set on the obstacle when the mover is the player's legs or graphic 91 (MARK_STOOD_ON), and on the mover when the obstacle is the player's legs (graphics 32-39): the update routines LIFT, BOBBER and CRUMBLING_BLOCK read it (the lift and the bobbing head, measured in staged rooms). An obstacle of graphic 140-143 carries the mover along (CONVEYOR_PUSH). The obstacle gets bit 3 of its +$0D, something has met it in Z, as in Knight Lore. And a mover with bit 2 of +$07 gives its intended dZ to the obstacle and, wherever its own dU or dV is zero, takes on the obstacle's, so standing on something that moves carries it along (measured in the simulator: a mover with bit 2 falling on a block moving 3 in U and -1 in V took on both, and the block took the mover's -2 in Z).