Abstract:
A computer-implemented method, apparatus, memory embodying computer-readable code for installing software stored on a second machine to a first machine in a distributed computing network is provided. The first machine includes at least a display, processor, and user controls. The method includes the steps of displaying available, installable source objects of a second machine embodying software that is installable on a first machine, displaying software bundle objects having software items, wherein at least one software item is in common with one of the software items in the selected source object in response to a selection by user controls of at least one source object, and installing on the first machine an intersection of the first software items and the second software items.
Abstract:
A disk drive controller having a plurality of disk drive interfaces, each interface includes a connector, a delay circuit, and a set of power application circuits is provided to a server to support hot docking of SCA drives. Each connector is adapted to mate with a hot docking disk drive having equal length connecting pins, and detect the presence of such disk drive when the hot docking disk drive makes contact with the connector. Each delay circuit generates a set of properly delayed enabling signals to the corresponding power application circuits. Each set of power application circuits regulates power applications to the hot docking disk drive making contact with the corresponding connector. The delayed and regulated manner of applying power prevents voltage and power swings that might disrupt on-going operations and/or cause damages to the neighboring drives.
Abstract:
An asynchronous transfer mode (ATM) segmentation and reassembly (SAR) chip is provided for interfacing a host computer with an ATM system having a physical layer (PHY) chip incorporating, for example, a Unified Test and Operations Physical Interface for ATM (UTOPIA) protocol. The PHY chip is capable of operating at both 155 Mbps and 622 Mbps data transmission rates. The UTOPIA protocol requires a clock which is provided by the SAR chip. In an exemplary embodiment described herein, the SAR chip is configured to accommodate both data transmission rates and to synthesize appropriate clock signals for driving the PHY chip which facilitate the clocking out of data and the sampling of data.
Abstract:
A ring network of workstations interconnected on a single simplex ring is converted to duplex communications on the single ring by placing two transceivers in each workstation and adding a duplex conversion device between each workstation and its ring terminal box. One of the transceivers receives and retransmits signals in a clockwise direction around the ring; the other transceiver receives and retransmits signals in a counter-clockwise direction around the ring. The clockwise and counter-clockwise signals are superimposed on the ring but are isolated at the workstations by the duplex conversion device.
Abstract:
An interface file structure for allowing transfer of information between nodes in a network and a binding process for configuring nodes in the network. The interface offers an advantageous format designed to provide for minimal reading and writing of records while requiring minimal storage space per record. Further, an advantageous format for storing numeric information is disclosed in which information providing the number of buffers allocated and the size of such buffers is stored in a single nibble thus reducing required storage space.
Abstract:
A multimedia intercommunications installation suitable for conveying animated images between a plurality of users each provided with a microcomputer type of workstation. Each user is provided with a new central unit which processes the pixels for the screen directly. The new CPU receives and forwards data concerning animated images, sound, and writing. The writing data is advantageously generated by the writing members already provided for the workstation.
Abstract:
A bus interface circuit is for coupling between a microprocessor having an architecture in which address and data buses are separated and peripheral equipment having a multiplexing bus architecture. The bus interface circuit includes a first delay circuit for delaying a first address strobe signal of a microprocessor to obtain a first data strobe signal, a second delay circuit for delaying the first data strobe signal to obtain a second data strobe signal for the peripheral equipment, a logic circuit for multiplying an inverted first data strobe signal and the first address strobe signal to obtain a second address strobe signal for the peripheral equipment, a first buffer enabled by the first data strobe signal for transmitting address data of the microprocessor, and second buffer means enabled by the second address strobe signal for transmitting and receiving data information between the microprocessor and the peripheral equipment.
Abstract:
A data aligner transfers data from an input having N+1 byte lanes to an output having N+1 byte lanes. The data aligner includes a write data aligner and a read data aligner. The write data aligner includes a write shifter coupled to the N input byte lanes and a stage having N selector/registers S1(i). The N selector/registers each have a queuing register R(i) and bypass multiplexer M(i). The N selector/registers are coupled to the N output byte lanes. The write shifter and N selector/registers S1(i) are coupled to a control circuit. The read data aligner includes a stage having N selector/registers S2(i) and a read shifter. The S2(i) selector/registers are coupled to N+1 byte input lanes with the S2(i) outputs coupled to the N read shifter inputs. The read shifter outputs are then coupled to the N+1 output byte lanes. Finally, a control circuit is coupled to the selector/registers S2(i) and read shifter.
Abstract:
Novel object-oriented client-server facility (CSF) and networking service facility (NSF) interfaces implement communication between application programs residing in client and server nodes of a distributed services network. The CSF interface includes remote procedure call (RPC) objects for invoking and responding to service requests at the nodes, and application programming interface (API) objects for transporting those requests between the nodes. However, the API objects only provide communication transports within a node. Accordingly, the API and RPC objects interact with dynamically-configurable protocol stacks within the NSF interfaces to complete the transport mechanism needed by an application program on the client node when accessing services on a remote server node.
Abstract:
A method and apparatus for determining an optimal multistage transformation from a first document format to a second document format via multiple format type transformation applications. Each document format type within a data processing system is identified and associated with a node within a format type network. An expenditure cost associated with each format type transformation application, such as time cost or information loss cost, is identified and associated with a link between two associated nodes in the format type network. An optimal path from a first node within the format type network to a second node is then calculated by means of links having minimal expenditure cost associated therewith. In one depicted embodiment of the present invention an optimal path from a selected node to all other nodes within the format type network is calculated and utilized for all future desired transformations.