__pdata int16_t ao_height;
__pdata int16_t ao_speed;
__pdata int16_t ao_accel;
-__pdata int16_t ao_max_height;
+__xdata int16_t ao_max_height;
static __pdata int32_t ao_avg_height_scaled;
-__pdata int16_t ao_avg_height;
+__xdata int16_t ao_avg_height;
__pdata int16_t ao_error_h;
__pdata int16_t ao_error_h_sq_avg;