Hitachi, Ltd.

Kesami Hagiwara

Mitsuru Hiraki

Atsushi Kiuchi

A data processor apparatus having first and second instruction storages for holding a series of instructions to be executed reiteratively. The number of instructions is calculated based on the difference between a start address and an end address respectively stored in a start address register and an end address register. When the number of instructions constituting the series of instructions is less than the capacity of the second instruction storage, the series of instructions is read from the second instruction storage and executed. When the number of instructions is greater than the capacity of the second instruction storage, the series of instructions is read from the first instruction storage.

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Higashiyamato, Japan

Kesami Hagiwara