Abstract:
A computer system includes a memory device on the first data bus, a requesting device that initiates a delayed memory read transaction on a second data bus, and a bridge device that delivers the delayed memory read transaction to the first data bus and receives from the first data bus completion data requested in the memory read transaction. The bridge device includes a data storage buffer that stores the completion data, and a buffer management element that automatically requests from the memory device additional data to be placed in the data storage buffer.
Abstract:
A method of distributing program material to a number of access providers which have identified themselves as having clients meeting profiles specified in a program material placement request, which is typically from an advertiser. More specifically, summary information is transmitted to a control distribution node from each of the access providers, where the summary information describes customer profile information on the customers using each respective access provider. This summary information is then processed by the control distribution node to allocate the number of copies of program material that may be delivered to the clients or customers by each of the access provider nodes.
Abstract:
A color graphic and texture data transmission and duplication system based on the methods and structures of computer structure, central processing unit, data communication, ink-jet printing, embedded circuit, firmware, dual bus, parallel transmission, ASIC, cell active, pin sharing, to achieve the functions of color scanning, fax transmitting, fax receiving, document duplicating, and data printing.
Abstract:
The present invention provides an alignment logic circuit transferring segments of data from a first storage device to a second storage device. The segments of data are aligned in the first storage device, in a first and second dimension, according to a first configuration. The segments of data are aligned in the second storage device, in the first and second dimension according to a second configuration. The alignment logic circuit includes a first alignment stage, a second alignment stage, and an alignment control logic controls the first alignment stage such that the first alignment stage outputs data aligned in the first dimension according to the second configuration, and the second alignment stage outputs data aligned in the second dimension according to the second configuration.It is also provided a computer system with a DMA controller with a Memory Write and Invalidate logic circuit. The Memory Write and Invalidate logic circuit generates a Memory Write and Invalidate enable signal when the DMA byte count is greater than a recall with a cacheline size, and the current transfer adders is a multiple of the cacheline size.The present invention also provides a computer system including a host processor, a first bus coupled to the host processor, a second bus, slave circuit coupled to the second bus, and a direct memory access controller (DMA). The DMA performs DMA transactions between the first and second buses. The DMA controller includes a DMA error handling logic, coupled to the host processor, for receiving a retry signal indicative of a retry request of the slave circuit. The DMA error handling logic also receives an error signal indicative of an error on the first bus. The error handling logic aborts a DMA transfer when the error signal is asserted and the retry signal is deasserted.
Abstract:
A universal asynchronous receiver/transmitter (UART) computer programming interface emulates three-wire interface control. A register select circuit is supplied with address signals from a host CPU and has a plurality of register outputs organized into first and second groups. One of these groups of outputs are those which are required for three-wire operation in communications devices; and these outputs are mapped to the appropriate communications devices or registers. The other group of outputs required for three-wire operation, but with no corresponding function in a communications device, are implemented by means of an UART emulator circuit producing a data output which is coupled to an internal data bus, along with the output of the registers for the communications devices.
Abstract:
A computer system 10, such as a notebook computer, uses a modular bay 12 to receive optional devices 14. Buffer circuits 36 selectively isolate the device 14 in the modular bay from respective buses 34. An SMI handler, or similar executable routine, recognizes events which affect the modular bay 12 (such as insertion or removal of a device 14 from the modular bay 12), and performs the necessary routines to re-enumerate the system so that the device 14 is properly connected to its bus 34 and that the system software is aware of the hardware connected to computer 10.
Abstract:
An interface device is adapted to control computer peripherals by directly executing drivers installed on the computer and respectively corresponding to the computer peripherals without interrupting currently open applications. The interface device includes a housing, a micro-processor located in the housing for generating control signals corresponding to the computer peripherals and transmitting the control signals to the computer to cause the computer to execute the drivers. A key pad device is located on one surface of the housing, including plural buttons which can be selected by the user to control the corresponding computer peripherals.
Abstract:
A bus controller controls access to a processor bus by arbitrating between bus requests received from a plurality of bus requesters. The bus controller employs a pipelining arbitration mechanism in which a first bus requests from each bus requester is buffered to allow each bus requester to begin producing a second bus request before one of the first bus requests is selected by arbitration. As such, the bus controller performs arbitration between the first bus requests in parallel with the generation of the second bus requests by the bus requesters. The parallel pipelining approach enables the bus controller to base its arbitration decision on plural bus requests from each bus requester. The bus controller can select two bus requests from a first bus requester before selecting any of the bus requests from the other bus requesters.
Abstract:
Customized circuitry implemented on the transmitting end of an interchip communication bus reduces the number of clock cycles required to transmit control packets over the interchip communication bus. The packet transaction protocol is predicated upon the relationship between consecutive command words sent over the interchip bus so that, if consecutive words at a packet boundary contain the same data, this data can be saved as separate command words by the receiving chip within a single clock cycle. This is accomplished through the generation of a synchronization signal whenever a new packet is started. In a preferred embodiment, bit patterns for the first and/or last word of a packet which are found to be statistically more prevalent are intentionally juxtaposed to increase the probability of consecutive command words having the same information.
Abstract:
A non-blocking load buffer for use in a high-speed microprocessor and memory system. The non-blocking load buffer interfaces a high-speed processor/cache bus, which connects a processor and a cache to the non-blocking load buffer, with a lower speed peripheral bus, which connects to peripheral devices. The non-blocking load buffer allows data to be retrieved from relatively low bandwidth peripheral devices directly from programmed I/O of the processor at the maximum rate of the peripherals so that the data may be processed and stored without unnecessarily idling the processor. I/O requests from several processors within a multiprocessor may simultaneously be buffered so that a plurality of non-blocking loads may be processed during the latency period of the device. As a result, a continuous maximum throughput from multiple I/O devices by the programmed I/O of the processor is achieved and the time required for completing tasks and processing data may be reduced. Also, a multiple priority non-blocking load buffer is provided for serving a multiprocessor running real-time processes of varying deadlines by prioritization-based scheduling of memory and peripheral accesses.