Phillip D Hester

Title: Innovations by Phillip D Hester

Introduction

Phillip D Hester is a notable inventor based in Austin, TX. He has made significant contributions to the field of technology, particularly in instruction execution and exception handling in microprocessors. With a total of 6 patents, Hester's work has had a considerable impact on the efficiency and functionality of computing systems.

Latest Patents

Hester's latest patents include a system executing branch-with-execute instruction resulting in next. This invention describes a method and apparatus for expanding the capability of an instruction prefetch buffer. The method enables the instruction prefetch buffer to distinguish between old prefetches that occurred before a branch in an instruction stream and new prefetches that occurred after the branch. A control tag is generated each time a request for an instruction is sent to storage. The returning instruction has the original control tag appended, which is then compared to the current value in the instruction prefetch buffer. If the values match, it indicates that a branch has not occurred, and the instruction is still required. Conversely, if the values differ, it indicates that a branch has occurred, and the instruction is no longer needed. This method is also applicable to branch-with-execute instructions, allowing the system processor to continue operating while waiting for the branch target instruction.

Another significant patent addresses exception handling in a pipelined microprocessor. This method processes address translation exceptions in a virtual memory system employing demand paging. It involves temporarily storing effective storage addresses, exception control word information, and any data to be stored during operations. If an exception is generated, the temporarily stored information is retrieved to form an exception status block, which is then used to reinitiate the failed operation.

Career Highlights

Phillip D Hester is currently employed at International Business Machines Corporation (IBM). His work at IBM has allowed him to develop innovative solutions that enhance the performance of computing systems. Hester's expertise in instruction execution and exception handling has positioned him as a valuable asset in the technology sector.

Collaborations

Hester has collaborated with notable colleagues, including William M Johnson and Richard Ormond Simpson. These collaborations have contributed to the advancement of technology and the development of innovative solutions in the field.

Conclusion

Phillip D Hester's contributions to technology through his patents and work at IBM highlight his role as an influential inventor. His