extern __xdata struct ao_task * __xdata ao_tasks[AO_NUM_TASKS];
extern __data uint8_t ao_num_tasks;
extern __xdata struct ao_task *__data ao_cur_task;
extern __xdata struct ao_task * __xdata ao_tasks[AO_NUM_TASKS];
extern __data uint8_t ao_num_tasks;
extern __xdata struct ao_task *__data ao_cur_task;