Abstract: An information processing apparatus for allowing a memory to be added thereto while being powered. The apparatus comprises a processor, a first main memory initially connected, and a connecting switch. The switch connects the processor, the first main memory, and a second main memory to be added. Main memory management information in the first main memory includes the size of memory resources connected to the processor. A storage region in the connecting switch retains information about whether or not the processor is connected to each of the memories. The setup allows the apparatus to use the added memory without having to be restarted.

Abstract: A heat shield for a crystal puller including an inner and an outer reflector. The inner and outer reflectors are spaced from each other an have reduced surface area in which they contact each other. Improved heat shielding of a growing crystal ingot reduces defects and permits a greater throughput of ingots produced by the crystal puller.

Abstract: One or more combinations of an operating data processing machine and a backup data processing machine are connected together to enable backup switching wherein the backup machine takes over the data processing from the operating machine when a failure occurs in the operating machine. In particular, each of the operating and backup machines is connected to one or several system resources, such as data storage or data output devices. The operating processor exclusively occupies the system resources, and when a failure occurs the operating processor is disconnected therefrom. A disconnection completion notice is sent to the backup processor, which then begins to exclusively occupy the system resources for performing ongoing data processing that would have been performed by the operating processor had the failure not occurred. When a failure occurs with the operating processor, the data being processed and the data concerning the failure are dumped to an auxiliary memory to facilitate analysis of the failure.

Abstract: A semiconductor integrated circuit system having a function of automatically adjusting an output resistance value with reference to a temperature of an LSI which is operating. When a count value obtained from a counter by counting the output of a timer becomes equal to a predetermined value, a temperature sensor measures temperatures of LSIs. If a temperature fluctuation measured from a previous measured value is greater than a predetermined width, then a control apparatus issues an output resistance value adjustment request signal to output resistance adjustment units of the LSIs.

Abstract: In a multi-processor system interconnecting processor units, memory units, and input/output units connected to input/output devices via a crossbar switch having a plurality of ports, the transmitter of each processor unit has a circuit for determining a destination of an access request in the following manner. For an access request to a main memory, the access request is transferred to all processor units and one memory unit storing the data to be accessed. For an access request to a memory mapped register of the input/output device, the access request is broadcast to all input/output units. For an access request to a memory mapped register belonging to any one of the processor units, memory units, and input/output units, the access request is broadcast to all units via the crossbar switch.

Abstract: A system for controlling the DMA transfer for a plurality of IO devices has an IO controller for each group of the IO devices. Data is retrieved from memory and stored in the IO controller where it is analyzed. The retrieved data has a structure that permits a group of DMA start request quads to be linked together for parallel or pipeline processing of the DMA transfer requests. Each start request quad has a pointer for additionally retrieving corresponding command data. The command data is set forth in a number of blocks, each linked to the next one by a pointer. When a DMA processing has been completed, the termination or completion status is entered into a specific entry in a completion list for the corresponding IO device. Thus, a determination can be made as to whether specific IO devices have completed a requested DMA processing.

Abstract: The carry-line comprises a plurality of MOSFETs connected in series. MOSFETs precharge each node when they receive precharge signals /PR. In the case of high-order priority designated mode, when input signals are given for turning on MOSFETs located between one end of the high-order bit side of the carry-line, the control circuit discharges the intermediate node separately from the carry-line. In the case of low-order bit priority designated mode, when input signals are given for turning on MOSFETs located between one end of the low-order bit side of the carry-line and the intermediate node, the control circuit discharges the intermediate node separately from the carry-line.

Abstract: The same bit lines are used in common to a fixed data cell array and a memory cell array. The output section of the fixed data cell array is connected to an output circuit, just like the output section of the memory cell array. In response to signal CON supplied from a computer, an array selector examines the states of the arrays and performs switching between the state where one of the arrays can be selected and the state where neither of them can be selected. In the case where an externally-programmable memory, such as an EPROM, is employed, a write control circuit operates with respect only to the memory cell array, and prohibits data from being written in the fixed data cell array. The fixed data cell array is pre-programmed as a nonvolatile memory by programming means different from that used for programming the cells of the memory cell array.

Abstract: Disclosed is a method of measuring the OF width of a cylindrical single crystal ingot using an optical non-contact type displacement measuring device. This method can avoid the labor and measurement errors as generally seen in the conventional manual method and provide an easy and precise measurement. Further, the method can be automated if necessary. This method comprises the steps of detecting the boundary points between the OF and the round surface of the single crystal ingot from the displacement to be obtained by scanning the sensor while detecting the distance between the sensor and the ingot surface including the OF, and calculating the OF width C from the scanning distance A of the sensor from the first boundary point detection position to the second boundary point detection position and the difference B between the first distance 1.sub.1 from the first boundary point to the sensor and the second distance 1.sub.2 from the sensor to the second boundary point.

Abstract: A disc recording/reproducing apparatus according to the present invention intermittently records and reproduces compressed digital audio data in normal recording/reproduction. In high-speed dubbing of digital audio data, two of such apparatuses are used, wherein compressed digital audio data is continuously reproduced from a disc for reproduction by the reproduction side apparatus to be directly applied to the recording side apparatus and continuously recorded on a disc for recording. Thus, the compressed high-speed dubbing of the digital audio data can be achieved without increasing a rotation speed of the disc even in high-speed dubbing.

Abstract: In an information processing system having an upper rank apparatus and an external storage device which performs transmission and reception of data between the storage device and the upper rank apparatus, at least one of encryption and decryption of the data by use of an algorithm controlled by a desired data key is performed in the external storage device, while generation, encryption and decryption of the data key are performed on the upper rank apparatus side. By this configuration, the burden of the upper rank apparatus is largely reduced and the secrecy of data stored in the external storage device can be surely kept without spoiling the throughput of the whole system.

Abstract: A novel and improved control and supervisory system for power distribution equipment including a plurality of terminal control and/or supervisory devices each capable of controlling and/or supervising a plurality of power distribution devices in an extremely simple, high-speed and efficient manner without requiring any central control and/or supervisory unit. To such control and/or supervisory operation, no vast and full knowledge of permitted and inhibited operations of varying kinds of power distribution devices connected therewith, as well as of the control and supervisory procedures therefor, is required.

Abstract: A level conversion circuit includes first to nth circuits, each having an input terminal and first to nth output terminals where n is an integer, and first to nth signal lines coupled to the first to nth circuits. Each of the first to nth circuits comprises a part for outputting a first voltage to the first output terminal and outputting a second voltage to the second to nth output terminals other than the first output terminal when an input signal applied to the input terminal is at a first level and for maintaining the first to nth output terminals in high-impedance states when the input signal is at a second level different from the first level. The first output terminal of each of the first to nth circuits is connected to one of the first to nth signal lines so that first output terminals of the first to nth circuits are connected to mutually different signal lines.

Abstract: A cryptographic communication method and system for performing cryptographic communication between a host computer and a given one of plural terminals connected to the host computer by way of a communication network by using a data key designated by the given terminal or the host, wherein the host computer includes a cryptographic processing unit which includes a processing part for performing a public key cryptographic processing by using a pair of a public key and a private key and a common key cryptographic processing by using a common key, and an internal memory for storing master common key and master private key, a storage for recording as user private key information those data that result from the public key cryptographic processing performed by using a master public key on a plurality of user private keys which are in paired relation to user public keys held in the user terminals, respectively, and control means for performing input/output control between the storage and the cryptographic processing

Abstract: A mobile telecommuncations system has multiple base stations each defining a miniature service zone and capable of communicating with mobile stations present in the service zone over a radio link. Geographically associated ones of the base stations are spaced apart from each other by an area which is not responsive to electromagnetic waves on the radio links, whereby the base stations are allowed to share the same frequency for the electromagnetic waves. The base stations are interconnected to an on-road vehicle telecommunications network which switches communications to the base stations.

Abstract: In an emitter follower circuit including an emitter follower transistor (Q3, Q4), and a series-connected circuit connected to the emitter of the emitter follower transistor and including a current source (Q3, Q4) and a current source resistor, the current source resistor being formed by a MOS transistor (N4, N5), the emitter follower circuit being switched to active and inactive states by switching the state of the MOS transistor (N4, N5) by a control signal, there is provided current path means provided between the source and drain of the MOS transistor, for providing a resistance considerably larger than a resistance of the MOS transistor provided during conducting when the MOS transistor is at least cut off and passing an extremely small current passes therethrough at that time.

Abstract: A diaphragm for a speaker formed of a mixture of carbon fiber, pulp and polyvinyl alcohol fiber as a binder with a thermosetting resin on the diaphragm base on which a metal film is provided in the interstices between fibers and on the entire fiber surface.

Abstract: A diaphragm for a speaker obtained by forming a diaphragm base by screen processing a mixture of carbon fiber, pulp and polyvinyl alcohol fiber as a binder in a manner similar to that employed for making paper, depositing a thermosetting resin on the diaphragm base by impregnation or coating, and subjecting the diaphragm base, on which the thermosetting resin has been deposited, to electroless plating to deposit a metal film in the interstices between fibers and on the entire fiber surface.