| 摘要 |
PURPOSE:To prevent a program from runaway by storing the leading information of each instruction of a program, reading out and executing each instruction, reading out the leading information at a prescribed timing, and when the information does not exist, setting up a program processing circuit to the initial state. CONSTITUTION:A microprogram is stored in the 1st storage circuit 2, the leading information of each instruction is stored in the 2nd storage circuit 3, reading address information is supplied from a program processing circuit 1 to the circuits 2, 3 to obtain the instruction information of the program from the circuit 2, and a leading information existence signal is supplied from the circuit 3 to a deciding circuit 4. A leading timing signal is applied from the circuit 1 to the circuit 4 to decide the leading information existence signal, and when the signal does not exist, the circuit 4 applies an initializing signal to the circuit 1. |
