Decoded from SKIDMARKS_CD32's machine code:
- Car physics: the per-frame engine/grip/steering update, gravity and
jumps, the hill effect on the throttle, and body tilt. Replaces the
reconstructed handling model.
- The meaning of every .set value (separate drag, grip and power for
human and computer drivers; steering, gravity, tow hitch), and the
six handling presets, offered by a new Handling menu option.
- Walls: the road edges are quadratic B-splines through the gates'
ends. They match the painted road edges.
- The real projection, which lifts points by their height; the height
map is indexed by world cells, not screen pixels.
- Tracks have one more gate than the stored count: the last gate was
being dropped on every track.
Computer drivers now follow the road between the walls and steer like
the original's. Vehicle assets store the values as `handling`; older
files still load. Docs describe the decoded logic.