摘要:
A computer system includes a bus arbiter for controlling the ownership of a bus to which a variety of both real time and non-real time resources are coupled. The bus arbiter includes a request detection unit for detecting bus request signals of a plurality of bus masters, and a grant generator for generating corresponding grant signals to indicate a grant of ownership of the bus. A set of programmable registers are provided to receive configuration information for controlling the relative priority given to each of the bus masters when bus request contention occurs. One or more of the bus masters includes an arbitration feedback control circuit and feedback register for generating and storing a value to indicate whether the latency in obtaining the bus during a previous bus request phase was generous, was acceptable, or was longer than desired (i.e., the latency requirement for the device was either violated or the latency in obtaining the bus reached a near-critical point). If the value in the feedback register of a particular peripheral indicates the master desires faster access to the bus, an arbitration control unit of the bus arbiter increases a level of arbitration priority given to that master for future bus requests. Similarly, if the value in the feedback register of a peripheral indicates the master received ownership of the bus during a previous bus request phase with ample time, the arbitration control unit may decrease a level of arbitration priority given to the device.
摘要:
An interlocking, compressible spoke wheel system having a ring of paired spokes. The locking of left and right spokes into pairs provides improved tire displacement under loads. The left and right half wheels formed by sets of left spokes and right spokes. enable a novel mounting system for the wheel rim or tire to attach to the spoke system.
摘要:
An interlocking, compressible spoke wheel system having a ring of paired spokes. The locking of left and right spokes into pairs provides improved tire displacement under loads. The left and right half wheels formed by sets of left spokes and right spokes. enable a novel mounting system for the wheel rim or tire to attach to the spoke system.
摘要:
System and method for determining closure of an electronic device. The electronic device may include a top portion and a bottom portion, and may be connecting via a hinge or other closing mechanism. The top portion and/or the bottom portion may include one or more capacitive sensors which provide signals corresponding to physical contact and a controller coupled to the one or more capacitive sensors. The controller may operate to receive the signals from the one or more capacitive sensors, determine if the electronic device has been closed based on the received signals, and initiate a sequence of events corresponding to the closure of the electronic device. The sequence of events may result in the device entering a low power state.
摘要:
An interlocking, compressible spoke wheel system having a ring of paired spokes. The locking of left and right spokes into pairs provides improved tire displacement under loads. The left and right half wheels formed by sets of left spokes and right spokes. enable a novel mounting system for the wheel rim or tire to attach to the spoke system.
摘要:
System and method for performing pre-boot security verification in a system that includes a host processor and memory, an embedded microcontroller with an auxiliary memory, e.g., an on-chip ROM, or memory controlled to prohibit user-tampering with the contents of the memory, and one or more pre-boot security components coupled to the embedded microcontroller. Upon power-up, but before host processor boot-up, the embedded microcontroller accesses the auxiliary memory and executes the program instructions to verify system security using the one or more pre-boot security components. The one or more pre-boot security components includes at least one identity verification component, e.g., a smart card, or a biometric sensor, e.g., a fingerprint sensor, a retinal scanner, and/or a voiceprint sensor, etc., and/or at least one system verification component, e.g., TPM, to query the system for system state information, and verify that the system has not been compromised.
摘要:
System and method for performing pre-boot security verification in a system that includes a host processor and memory, an embedded microcontroller with an auxiliary memory, e.g., an on-chip ROM, or memory controlled to prohibit user-tampering with the contents of the memory, and one or more pre-boot security components coupled to the embedded microcontroller. Upon power-up, but before host processor boot-up, the embedded microcontroller accesses the auxiliary memory and executes the program instructions to verify system security using the one or more pre-boot security components. The one or more pre-boot security components includes at least one identity verification component, e.g., a smart card, or a biometric sensor, e.g., a fingerprint sensor, a retinal scanner, and/or a voiceprint sensor, etc., and/or at least one system verification component, e.g., TPM, to query the system for system state information, and verify that the system has not been compromised.
摘要:
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 may also include 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 includes byte slicing and/or data packing logic coupled to one or more of the expansion bus and/or the multimedia bus which operates to allow different data streams to use different byte channels simultaneously. Thus the byte sliced bus allows different peripherals to share the bus simultaneously. The byte slicing logic thus may assign one data stream to a subset of the total byte lanes on the multimedia bus, and fill the unused byte lanes with another data stream. The data packing logic may optimally fill the bus with data having more or fewer bits than the bus. The computer system of the present invention thus provides much greater performance for real-time applications than prior systems.
摘要:
An improved bus arbitration system comprising an information bus, first and second bus masters connected to the bus and a bus arbiter for controlling ownership of the bus. The first bus master is adapted to perform speculative pre-fetching and has a first REQ signal for requesting ownership of the bus and an SP signal for indicating when a bus ownership request is for a speculative pre-fetch. The second bus master has a second REQ signal for requesting ownership of the bus. The bus arbiter is configured such that when the first bus master asserts its REQ signal and its SP signal and the second bus master asserts its REQ signal, the bus arbiter assigns higher priority to the second bus master in response to the SP signal.
摘要:
A method and apparatus for transferring original data which includes images, between two stations located a distance apart, without actual transmission of the image portion of the data. A library of images are provided at each of the stations. The image to be transferred is processed into a description of the image which allows the reproduction of the image at the receiving end of the transmission using the images contained in the image library in the receiving station.