Interfaces in Computing最新文献

A variety of local computer network architectures have been evaluated for use in the Los Alamos National Laboratory Central Computing Facility in support of scientific research at this laboratory. A store-and-forward switched message system built around hardware products known as high speed parallel interfaces (HSPIs) was determined to be superior in this application to the more conventional contention bus systems. The HSPIs, together with some dedicated computers used as intermediate switching nodes, implement this store-and-forward architecture and form the backbone of the integrated computer network.

The HSPI channel standard was developed at Los Alamos for the interconnection of computers of different manufacture. This standard intercomputer interface is used for passing data and messages via the input-output channels of the different computers. Reliable full-duplex point-to-point data transfers at speeds of up to 50 Mbits s⁻¹ are accommodated. Extensive error detection and error correction capabilities are included in the HSPI hardware. HSPIs are currently in around-the-clock use at Los Alamos, interconnecting the computers of one of the world's most powerful computer networks.

In this paper the HSPI specifications and use of the HSPIs in the network are discussed. The Los Alamos network architecture and comparisons to a contention bus architecture are also discussed.

The transport service adaptor is an attempt to implement the functions required for a standard transport service interface into an intelligent high performance network interface device and therefore to reduce the host device software requirement. In this paper the details of the hardware and software that comprise the transport service adaptor and the physical and logical levels of the host device interface are described. Brief details are given of the local area network to which the transport service adaptor connects, together with the facilities that the network makes available.

An HP-85 microcomputer was used to control a Gould Biomation model 6500 transient waveform recorder using a high level interpretive programming language. A modular control program was developed, which is easily modified for alternative applications. This system was used to record and analyze fast transient waveforms in laser discharge tubes.

In this paper the ideal of open systems interconnection whereby computing and terminal equipment from different manufacturers can interwork is described. The various technical and political forces likely to affect the speed at which the ideal becomes a reality are also discussed.

In this paper an approach to the problem of specification of user interfaces for computer activity is described. It is based on work done in attempting to provide a tool for a formal definition of the user interface to a job transfer and manipulation network protocol.

The hardware and software aspects of an interface between a Princeton Applied Research (PAR) model 1216 Vidicon controller and a Digital Equipment Corporation DECLAB-11/MNC computer are described. The interface permits complete control of the Vidicon scanning parameters and data gathering. A major advantage over the OMA series offered by PAR is that the utility of the computer is not dedicated to control of the Vidicon; its full capabilities are available for additional tasks such as experimental control.