Mitsubishi Denki Kabushiki Kaisha

Hirohiko Inoue

Tsunenori Umeki

A memory access method in a microcomputer for a CPU to fetch an instruction code from a memory when an instruction queue buffer does not contain the instruction code, comprising the steps of fetching the instruction code from a high-speed memory directly to the CPU, if the instruction code is in the high speed memory, or fetching the instruction code from a low-speed memory to the instruction queue buffer, if the instruction code is in the low-speed memory, then fetching the instruction code from the instruction queue buffer to the CPU.

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Hyogo-ken, Japan

Hirohiko Inoue