US Patent No: 4,509,140

Number of patents in Portfolio can not be more than 2000

Data transmitting link

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Abstract

A communication network (10) has a memory unit (20) accessable to all ports (16-0, 16-1, 16-2, 16-3) of the link with a plurality of local sections (62) each associated with one of the ports. Interconnections include a dual memory bus (28) with a common bus subsystem (36) providing access to a common memory section and a local bus subsystem (30) providing access to the local memory sections, the subsystems constructed to permit concurrent independent use. Memory access priority circuitry (68) designates for each memory operating cycle a port for current service and makes memory access available to other elements when not required by the designated port.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
AMIGA DEVELOPMENT LLC, A LIMITED LIABILITY COMPANY OF THE STATE OF DELAWAREN SIOUX CITY, SD61

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cheung, Kin L North Andover, MA 5 90

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Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
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5,206,952 Fault tolerant networking architecture 7 1990
5,142,638 Apparatus for sharing memory in a multiprocessor system 22 1991
5,202,970 Method for sharing memory in a multiprocessor system 13 1992
 
SPERRY CORPORATION (3)
4,627,018 Priority requestor accelerator 44 1983
4,649,475 Multiple port memory with port decode error detector 21 1984
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ALLEN-BRADLEY COMPANY, INC. (2)
5,212,631 Programmable controller processor module having multiple program instruction execution sections 13 1992
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INTERNATIONAL BUSINESS MACHINES CORPORATION (2)
4,754,394 Multiprocessing system having dynamically allocated local/global storage and including interleaving transformation circuit for transforming real addresses to corresponding absolute address of the storage 50 1984
5,367,680 Rendering context manager for display adapters supporting multiple domains 22 1993
 
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY (1)
4,674,033 Multiprocessor system having a shared memory for enhanced interprocessor communication 31 1984
 
CPT CORPORATION (1)
H000696 System for accessing shared resource device by intelligent user devices 1 1987
 
FUJITSU LIMITED (1)
4,716,521 Microcomputer 12 1984
 
HITACHI, LTD. (1)
4,754,399 Data transfer control system for controlling data transfer between a buffer memory and input/output devices 23 1984
 
HONEYWELL INFORMATION SYSTEMS INC. (1)
4,654,788 Asynchronous multiport parallel access memory system for use in a single board computer system 24 1983
 
HONEYWELL INFORMATION SYSTEMS ITALIA (1)
4,665,483 Data processing system architecture 38 1984
 
INTEL CORPORATION (1)
5,146,565 I/O Control system having a plurality of access enabling bits for controlling access to selective ports of an I/O device 17 1991
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
5,584,010 Direct memory access control device and method in a multiprocessor system accessing local and shared memory 32 1994
 
NNT, INC. (1)
4,853,850 Vehicle computer diagnostic interface apparatus 63 1985
 
SIEMENS AKTIENGESELLSCHAFT (1)
5,159,674 Method for supplying microcommands to multiple independent functional units having a next microcommand available during execution of a current microcommand 5 1990
 
SILICON GRAPHICS, INC. (1)
4,901,230 Computer vector multiprocessing control with multiple access memory and priority conflict resolution method 62 1988
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
H696 System for accessing shared resource device by intelligent user devices 25 1987