| 摘要 |
PURPOSE:To display a microinstruction when it is executed in a desired number of times by using a means which counts the executing frequencies of the microinstructiin of a specific address within a loop. CONSTITUTION:An operator sets an address m-1 in a loop to an external address setter 21 and then sets the count value of a count value setter 29 at 3 in case three rounds of the loop is inspected. When the control of a CPU is started, an address coincidence pulse 26 is delivered every time a microinstruction of the address m-1 is executed. Then the count result 28 is counted up. The coincidence is obtained with a count value signal 31 when numerical value 3 is counted. The comparison result 33 is changed to H level, and a lighting signal 54 is delivered from a D-FF51 to turn on a display device 52. Then an operator knows that the loop has three rounds. With push of a reset switch 53, the D-FF51 is reset and the device 52 is turned off. Thus the initial state is reset. |
