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

Microprocessor configuration arrangement for selecting an external bus width

Patent 6226736 Issued on May 1, 2001. Estimated Expiration Date: Icon_subject March 10, 2017. 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

Digital computer with multi-processor capability utilizing intelligent composite memory and input/output modules and method for performing the same
Patent #: 4276594
Issued on: 06/30/1981
Inventor: Morley

Microprocessor with bus sizing function
Patent #: 5603048
Issued on: 02/11/1997
Inventor: Shindo, et al.

Microprocessor and microprocessor system with changeable effective bus width
Patent #: 5613078
Issued on: 03/18/1997
Inventor: Kishigami

Unified write buffer having information identifying whether the address belongs to a first write operand or a second write operand having an extra wide latch
Patent #: 5615402
Issued on: 03/25/1997
Inventor: Quattromani, et al.

Electronic system with circuitry for generating memory column addresses using memory array type bits in a control register
Patent #: 5724553
Issued on: 03/03/1998
Inventor: Shigeeda

Generation of memory column addresses using memory array type bits in a control register of a computer system Patent #: 5737764
Issued on: 04/07/1998
Inventor: Shigeeda

Inventor

Assignee

Application

No. 813274 filed on 03/10/1997

US Classes:

712/38, Offchip interface710/66, Width conversion712/43, Mode switching712/229, Mode switch or change713/2Loading initialization program (e.g., booting, rebooting, warm booting, remote booting, BIOS, initial program load (IPL), bootstrapping)

Examiners

Primary: Ellis, Richard L.

Attorney, Agent or Firm

International Class

G06F 009/00

Abstract

A microprocessor circuit arrangement is capable of retrieving and executing program instructions from a program memory having one of multiple possible bit-widths using address signals. A microprocessor uses a set of program instructions to select a memory configuration for retrieving the program instructions. The program memory stores the set of program instructions such that the microprocessor can retrieve the set of program instructions regardless of which bit-width is used to store the set of program instructions. Additional circuitry maps the address signals for retrieving the program instructions from the program memory.

Other References

  • Ian Hirschon, "Personal Supercomputing: Cray's ideas turn a PC into a virtual-memory 64-bit supercomputer", Dr. Dobb's Journal, Jun. 1992.
  • Statement by Applican
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