| 摘要 |
PURPOSE:To enable a person to recognize a general movement of an overall program by regarding a program as a group of task performing functions then displaying the states of execution of these tasks. CONSTITUTION:An optional address of a main memory 5 is supplied by a person through an input circuit 1, and at the same time the addresses of the task state words within a program are supplied in the same number as the tasks together with the task numbers. Then a central processor 4 is started to execute the programs stored in the memory 5. An address comparator 2 always intercepts the signals of a memory writing control line 6 and an address bus 7 and fetches the addressed flowing through the bus 7 every time the control signal of the line 6 is turned on. This address is compared with the address of a task state word. Then the task number is informed to a display circuit 3 when the coincidence is obtained from said comparison. The circuit 3 fetched the task word flowing on a memory bus 8 and performes a display in accordance with the contents of the relevant task state word. |
