US Patent No: 5,740,387

Number of patents in Portfolio can not be more than 2000

Computer system having an expansion bus which includes normal and real time modes

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Abstract

A computer system optimized for real-time applications which provides increased performance over current computer architectures. The system includes a standard local system bus or expansion bus, such as the PCI bus, and also includes a dedicated real-time bus or multimedia bus. Various multimedia devices are coupled to one or more of the expansion bus and/or the multimedia bus. The computer system expansion bus implements a new mode of operation specifically for real-time transfers. A real time signal is used to indicate that the expansion bus should be placed in a special real time mode. When not in special real time mode, the expansion bus operates as usual. The real time mode is optimized for the transfer of high bandwidth real-time information. The computer system of the present invention thus provides much greater performance for real-time applications than prior systems.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ADVANCED MICRO DEVICES, INC.SUNNYVALE, CA5244

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dutton, Drew Austin, TX 4 162
Lambrecht, Andy Austin, TX 18 614

Cited Art

Patent Info (Count) # Cites Year
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (5)
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5,274,784 Data transfer using bus address lines 16 1991
5,450,551 System direct memory access (DMA) support logic for PCI based computer system 114 1993
5,526,017 Analog image signal processor for a multimedia system 24 1993
5,533,205 Method and system for efficient bus allocation in a multimedia computer system 44 1994
 
LENOVO (SINGAPORE) PTE LTD. (2)
5,245,322 Bus architecture for a multimedia system 51 1990
5,487,167 Personal computer with generalized data streaming apparatus for multimedia devices 214 1994
 
1ST TELEPHONY LLC (1)
5,325,423 Interactive multimedia communication system 200 1992
 
APPLE INC. (1)
5,274,763 Data path apparatus for IO adapter 36 1990
 
CDC PROPRIETE INTELLECTUELLE (1)
5,530,902 Data packet switching system having DMA controller, service arbiter, buffer type managers, and buffer managers for managing data transfer to provide less processor intervention 38 1993
 
EASTMAN KODAK COMPANY (1)
5,404,463 Method and apparatus for transferring data in portable image processing system 81 1992
 
ELECTRIC POWER RESEARCH INSTITUTE, INC. (1)
5,208,745 Multimedia interface and method for computer system 212 1990
 
ERICSSON MESSAGING SYSTEMS INC. (1)
5,497,373 Multi-media interface 377 1994
 
FIRST TECHNOLOGIES, LLC (1)
5,564,001 Method and system for interactively transmitting multimedia information over a network which requires a reduced bandwidth 110 1994
 
GLOBALFOUNDRIES INC. (1)
5,557,757 High performance integrated processor architecture including a sub-bus control unit for generating signals to control a secondary, non-multiplexed external bus 40 1994
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
5,519,839 Double buffering operations between the memory bus and the expansion bus of a computer system 28 1992
 
HITACHI, LTD. (1)
5,345,566 Method and apparatus for controlling dual bus system 56 1992
 
ROCKWELL INTERNATIONAL CORPORATION (1)
4,245,344 Processing system with dual buses 121 1979

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
ADVANCED MICRO DEVICES, INC. (8)
6,058,443 System for partitioning PC chipset functions into logic and port integrated circuits 2 1997
5,926,629 Continuously operating interconnection bus 8 1997
6,101,560 Partitioned PC game port 5 1997
6,012,111 PC chipset with integrated clock synthesizer 2 1997
6,601,178 System power management partitioned across a serial bus 15 1997
6,032,213 PC core logic chipset comprising a serial register access bus 11 1997
5,987,560 Integrated programmable logic circuit for conditioning received input signals, detecting transitions of conditioned signals, and generating an associated interrupt respectively 7 1997
5,974,492 Method for input/output port replication using an interconnection bus 9 1997
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (5)
5,907,689 Master-target based arbitration priority 44 1996
5,859,989 Apparatus method and system for 64 bit peripheral component interconnect bus using accelerated graphics port logic circuits 16 1997
5,857,086 Apparatus method and system for peripheral component interconnect bus using accelerated graphics port logic circuits 31 1997
5,999,743 System and method for dynamically allocating accelerated graphics port memory space 19 1997
6,636,929 USB virtual devices 141 2000
 
INTEL CORPORATION (3)
6,119,190 Method to reduce system bus load due to USB bandwidth reclamation 22 1996
6,349,354 Method to reduce system bus load due to USB bandwidth reclamation 22 2000
7,228,366 Method and apparatus for deterministic removal and reclamation of work items from an expansion bus schedule 7 2001
 
MEI CALIFORNIA, INC. (3)
6,076,118 Attachment or integration of a BIOS device into a computer system using the system memory address and data bus 3 1997
6,009,522 Attachment or integration of a BIOS device into a computer system using the system memory data bus 4 1997
6,003,103 Method for attachment or integration of a bios device into a computer system using a local bus 6 1997
 
GLOBALFOUNDRIES INC. (2)
6,263,385 PC parallel port structure partitioned between two integrated circuits interconnected by a serial bus 8 1997
6,044,414 System for preventing a DMA controller from evaluating its DRQ input once a DMA operation has started until the DRQ input has been updated 6 1998
 
CHECKOUT COMPUTER SYSTEMS, LTD. (1)
D451917 Computer with display 16 2000
 
CHECKOUT HOLDINGS LIMITED (1)
6,487,068 Computer displays 12 2000
 
FAUST COMMUNICATIONS, LLC (1)
6,205,524 Multimedia arbiter and method using fixed round-robin slots for real-time agents and a timed priority slot for non-real-time agents 47 1998
 
GOOGLE INC. (1)
6,622,188 12C bus expansion apparatus and method therefor 33 1998
 
HITACHI SEIKI CO., LTD. (1)
5,877,959 Numerical-control system 8 1996
 
MICRON TECHNOLOGY, INC. (1)
6,182,213 Method for attachment of a bios device into a computer system using the system memory data bus 4 1997
 
SONY CORPORATION (1)
6,473,822 Digital signal processing apparatus 6 1999
 
VIA TECHNOLOGIES, INC. (1)
7,024,503 Link bus between control chipsets and arbitration method thereof 4 2003
 
YOKOGAWA ELECTRIC CORPORATION (1)
6,202,103 Bus data analyzer including a modular bus interface 32 1998