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

Computer memory system with integrated parallel shift circuits

Patent 4644503 Issued on February 17, 1987. Estimated Expiration Date: Icon_subject February 17, 2004. 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

3893088

Apparatus for image manipulation
Patent #: 3976982
Issued on: 08/24/1976
Inventor: Eiselen

Parallel access memory system
Patent #: 4150364
Issued on: 04/17/1979
Inventor: Baltzer

Image rotation apparatus
Patent #: 4168488
Issued on: 09/18/1979
Inventor: Evans

Code converter circuitry system for selectively rotating a video display picture
Patent #: 4225929
Issued on: 09/30/1980
Inventor: Ikeda

Row address linking control system for video display terminal
Patent #: 4249172
Issued on: 02/03/1981
Inventor: Watkins ,   et al.

Apparatus for parallel processing of local image data Patent #: 4550437
Issued on: 10/29/1985
Inventor: Kobayashi ,   et al.

Inventors

Application

No. 06/567215 filed on 12/30/1983

US Classes:

365/189.12, With shift register345/554, Multi-port memory365/230.03, Plural blocks or banks365/238, Cartesian memories365/238.5Byte or page addressing

Examiners

Primary: Fears, Terrell W.

Attorney, Agent or Firm

International Classes

G11C 7/10 (20060101)
G09G 1/02 (20060101)

Abstract

The system includes a plurality of memory units each for storing a plurality of independently addressable binary bits. The units operate together in response to each common bit address to supply a bit from each unit to form an array of bits for a discrete section of a larger array. The units are interconnected through common interconnection buses and selectively actuable input and output gate connections to those buses to provide for selective shifting of bits between units to change the bit array.

Other References

  • Robert F. Sproull et al, "The 8×8 Display", Dec. 1981, p. 10--Section 2.5. The Shifter--Carnegie-Mellon University
  • Andreas Bechtolsheim & Forest Baskett, "High Performance Raster Graphics for Microcomputer Systems", Computer Systems Laboratory, Stamford University--pp. 43-47 of Computer Graphics, vol. 14, No. 3, Jul. 1980
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