Hsiao-Shih Chang

Title: Hsiao-Shih Chang: Innovator in Microprocessor Technology

Introduction

Hsiao-Shih Chang is a notable inventor based in Orange, California, recognized for his contributions to microprocessor technology. He holds a total of 6 patents, showcasing his innovative approach to solving complex problems in computing.

Latest Patents

Among his latest patents is a method and apparatus for simultaneously executing instructions in a microprocessor. This invention involves an instruction combination unit that compares multiple fetched instructions to determine if they can be executed simultaneously. The unit checks the destination registers of preceding instructions against the source registers of subsequent instructions. If a subsequent instruction needs to operate on a result from a preceding instruction before that result is available, a data access conflict occurs. The instructions are then compared and combined if feasible; otherwise, the execution of the subsequent instruction is stalled until the necessary result is available.

Another significant patent by Chang is a method and apparatus for detecting memory segment violations in a microprocessor. This protection mechanism incorporates multiple privilege levels for tasks running on the microprocessor. The memory control unit includes segment registers that identify memory segments assigned to various tasks. When a segment register is loaded with a new segment address, the protection mechanism compares the privilege level of the requesting task with that of the requested memory segment. This programmable relationship allows for flexibility in generating privilege faults.

Career Highlights

Hsiao-Shih Chang has worked with several prominent companies in the semiconductor industry, including Meridian Semiconductor, Inc. and United Microelectronics Corporation. His experience in these organizations has contributed to his expertise in microprocessor design and technology.

Collaborations

Throughout his career, Chang has collaborated with notable professionals, including James A. Kane and Graham B. Whitted, III. These collaborations have further enriched his work and innovations in the field.

Conclusion

Hsiao-Shih Chang's contributions to microprocessor technology through his patents and collaborations highlight his significant role as an inventor. His innovative methods continue to influence the development of computing technologies.