extern __pdata int16_t ao_height; /* meters */
extern __pdata int16_t ao_speed; /* m/s * 16 */
extern __pdata int16_t ao_accel; /* m/s² * 16 */
-extern __pdata int16_t ao_max_height; /* max of ao_height */
-extern __pdata int16_t ao_avg_height; /* running average of height */
+extern __xdata int16_t ao_max_height; /* max of ao_height */
+extern __xdata int16_t ao_avg_height; /* running average of height */
extern __pdata int16_t ao_error_h;
extern __pdata int16_t ao_error_h_sq_avg;