Display FPS:  ~40  (camera interpolation, stable frame pacing)
Game logic:    20 FPS (unchanged — physics, AI, collision at original speed)
Next target:   60 FPS (1 hardware blocker remaining)

CPU Utilization (40 FPS, profiled):
  68000:       █████████░░░░░░░░░░░  48%   ← Idle 52% (STOP #$2300)
  Master SH2:  ██████░░░░░░░░░░░░░░  0-36% ← Command router + block copies
  Slave SH2:   ██████████████░░░░░░  73%   ← ALL 3D rendering (bottleneck)