Hiromi Nagayama

Title: Hiromi Nagayama: Innovator in Microcomputer Technology

Introduction

Hiromi Nagayama is a notable inventor based in Kodaira, Japan. He has made significant contributions to the field of microcomputer technology, holding a total of 3 patents. His work focuses on enhancing the functionality and efficiency of single-chip microcomputers.

Latest Patents

One of his latest patents is for a single-chip microcomputer that features an expandable address area. This innovation involves the addition of expansion registers E0 to E7 to the existing general registers R0 to R7 built on-chip in an 8-bit CPU. The design allows all registers, including the added expansion registers, to be utilized as a single unit of address data for memory access. The address operation is executed at a unit that includes both the expansion register and the corresponding general register. This approach reduces the number of executable instruction combinations without significantly compromising data processing capabilities. The register is enhanced to 32 bits by integrating a 16-bit expansion register with the 16-bit general registers of the CPU. This flexibility allows the register to be effectively utilized in various software and hardware applications, thereby minimizing the logical and physical scales of the CPU.

Career Highlights

Hiromi Nagayama is currently employed at Hitachi, Ltd., where he continues to innovate in the field of microcomputers. His work has been instrumental in advancing the capabilities of microprocessor technology, making significant strides in efficiency and performance.

Collaborations

He has collaborated with notable coworkers, including Naoki Mitsuishi and Shiro Baba, who contribute to the innovative environment at Hitachi, Ltd.

Conclusion

Hiromi Nagayama's contributions to microcomputer technology exemplify the spirit of innovation. His patents reflect a deep understanding of the complexities involved in computer architecture, paving the way for future advancements in the field.