U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Memory control method and memory control apparatus for pipeline processing

Patent 7222219 Issued on May 22, 2007. Estimated Expiration Date: Icon_subject June 8, 2024. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Branch prediction system for superscalar processor
Patent #: 5835754
Issued on: 11/10/1998
Inventor: Nakanishi

Information processing apparatus having a CPU and an auxiliary arithmetic unit for achieving high-speed operation
Patent #: 6249858
Issued on: 06/19/2001
Inventor: Hayakawa, et al.

Decoupled fetch-execute engine with static branch prediction support Patent #: 6523110
Issued on: 02/18/2003
Inventor: Bright, et al.

Inventor

Assignee

Application

No. 10862345 filed on 06/08/2004

US Classes:

711/137, Look-ahead711/204, Predicting, look-ahead711/213, Generating prefetch, look-ahead, jump, or predictive address712/239, Branch prediction712/34Including coprocessor

Examiners

Primary: Elmore, Reba I.

Attorney, Agent or Firm

International Class

G06F 12/00

Abstract

A signal generator detects a stage in which a central processing unit (CPU) reads an interrupt vector number from an instruction controller based on an address on an address bus and generates an address of a ROM to which the CPU makes access subsequently. The generated address is defined as a pre-reading address and this pre-reading address is supplied to the ROM via a selector before the CPU starts accessing to the ROM. In this case, an output buffer is turned off. Thereafter, when the CPU starts accessing to the ROM, the selector is switched and the output buffer is simultaneously turned on so that the address on the address bus is supplied to the ROM.

Other References

  • David A. Patterson and John L. Hennessey; “Computer Organization & Design”; 2nd Edition; 1999; pp. 430-433.
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