| 摘要 |
PURPOSE:To allow plural processing programs on time division basis under management programs without disturbing the system operation by adding a mask information supervisory circuit to a storage circuit. CONSTITUTION:A supervisory circuit 6 supervises a mask information signal 8 outputted from a central processing unit 1 during program processing and when a mask is set, a set signal 9 is outputted to the storage circuit 7. The storage circuit 7 stores that the mask is set and outputs a non-maskable interruption signal 10 to the central central processing unit at that time. The makes processing corresponding to the mask stored in the storage circuit 7. For example, when the interruption mask is set in the processing program, the execution of an internal interruption instruction or the execution of an interruption mask set is conducted.
|
