| 摘要 |
PURPOSE:To simplify a debugging operation, by switching the signal of an internal clock pulse generating circuit which performs an automatic mode, to the signal of a trigger generating circuit containing a variable resistor and a selection switch, and executing variably the manual mode. CONSTITUTION:For a program counter control circuit 5 which executes the program of an electronic computer, a pulse signal of an internal clock pulse generating circuit 6 is supplied via a changeover switch 10 in an automatic mode. Then the prescribed programs are successively executed by the contents of a program counter. To obtain a manual mode. a trigger generating circuit 7 is excited by a selection switch 8. Then the pulse signal of the circuit 7 is fed to the program control counter 5 via the switch 10, and the contents of the program counter are varied to execute the prescribed programs successively. The oscillating frequency of the circuit 7 is varied by a variable resistor 9, and the manual mode can be variably executed. In such a way, a debugging operation of a program is simplified to shorten the working time. |
