| 摘要 |
PURPOSE:To control execution and stop of a processing and a program exchange clearly and without contradiction by totally controlling a processor in three modes. CONSTITUTION:During the first mode, an address from a microprogram controller 60 is supplied to microprogram memories MPM 61-64 through a selector means 70 to execute the program. During the second mode, the address from the controller 60 is supplied to the MPM 61-64 through the means 70, however, to the controller 60, a signal for generating a program start address is constantly supplied therefrom, and the processing is stopped. During the third mode, the address from a program supplying part 40 is supplied to the MPM 60-64 through the means 70 and the program from the supplying part 40 is written in the MPM 61-64 according to a writing signal from a writing signal generating means 104 to exchange the program.
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