Company Filing History:
Years Active: 1980-1994
Title: Innovations of Yukio Maehashi
Introduction
Yukio Maehashi is a prominent inventor based in Tokyo, Japan. He holds a total of 18 patents that showcase his contributions to the field of technology. His work primarily focuses on data transfer and information processing systems.
Latest Patents
One of his latest patents is a data transfer controller using a direct memory access method. This invention is designed to control DMA data transfer between a memory area and a peripheral unit. The data transfer controller features a first register that stores address information relative to a predetermined address of the memory area. A DMA control unit utilizes this first register along with a second register to facilitate the data transfer. Additionally, the controller includes a third register for storing data used in accessing the memory area during the DMA transfer. An updater is incorporated to refresh the contents of the third register whenever a memory access occurs that differs from the data transfer operation. Furthermore, a counter modifies the contents of the third register in one direction during the data transfer and in the opposite direction during memory access.
Another significant patent is an information processor that performs interrupt operations without the need for saving. This processor is equipped with at least one interface unit that connects to peripheral equipment. The interface unit can generate either a first mode signal or a second mode signal when the processor executes an interruption operation based on requests from the peripheral equipment. In response to the first mode signal, a stack operation is performed to save necessary information for restarting a program execution. Conversely, the processor can execute the interruption operation in response to the second mode signal without performing the stack operation, resulting in a more efficient processor with reduced overhead.
Career Highlights
Yukio Maehashi has worked with notable companies such as NEC Corporation and Nippon Electric Co., Ltd. His experience in these organizations has significantly contributed to his expertise in the field of technology and innovation.
Collaborations
Throughout his career, Maehashi has collaborated with talented individuals, including Masahiro Nomura and Shigetatsu Katori. These partnerships have likely enriched his work and led to further advancements in his inventions.
Conclusion
Yukio Maehashi's innovative contributions to data transfer and information processing systems have made a significant impact in the technology sector. His patents reflect a deep understanding of complex systems and a commitment to improving efficiency in processing operations.