dejitarukonpiyu which uses the central processing unit and the peripheral device where maximum clock frequency differs - modulation impulse oscillation device which is used for frequency modulation type high-speed operational manner and the particular operational manner in ta, and konpiyu which uses particular operational manner - ta

摘要

PURPOSE: To prevent a defect in operation on a main storage device, etc., even if a CPU is replaced and the frequency of a clock is varied by including both OUT and IN pulses in operation pulses of a computer, and altering them and leaving a time between oscillations of both the pulses. ;CONSTITUTION: The input terminal A of a pulse modulating circuit system 2 is connected to the pulse oscillating circuit 1 that the personal computer originally has and when a pulse train that the clock oscillates is inputted to the input terminal A, a modulated pulse train is outputted from the output terminal B. This pulse train consists of pulses twice as many as those of the clock and a long pulse interval and a short pulse interval are alternated. Namely, the CPU reads data out of a main memory 3 at a pulse rise after the short pulse interval and writes data in the memory 3 at a rise after the long pulse interval. The interval from the reading to the writing of the memory 3 is longer than pulse intervals in the modulated pulse train. The pulse intervals are a half as long as the original intervals and the number of operations is twice.;COPYRIGHT: (C)1994,JPO