摘要:

The paper describes a software package designed to provide operator communication with a realtime digital controller. The structure of the program gives priority to the execution of the control algorithm, while the communication routines run in a time shared manner as a background task. The communication package can be used by the control algorithm itself to signal faults or error conditions to the operator, and provides an automatic method of fault logging. Operator intervention can be initiated from a keyboard or from a special-purpose operator console. The system has been designed and built round a Texas Instruments TI9900 microprocessor-based controller, although the package could be adapted for use with other processors. The total memory requirement of the present implementation is under 2K words

ISSN:1744-683X    

DOI:10.1049/sm.1981.0003

出版商:IEE    

年代:1981

数据来源: IET

摘要:

Ateletext serveris defined as a system that interfaces with a local computer network and handles requests for pages of broadcast teletext information. Some hardware and software aspects of a microprocessor based implementation of a teletext server are discussed, including a description of how it may be made compatible with a typical computer message forwarding system. The paper includes some discussion on the possibilities that arise when a teletext server is combined with a simple information retrieval system

ISSN:1744-683X    

DOI:10.1049/sm.1981.0004

出版商:IEE    

年代:1981

数据来源: IET

摘要:

The current trend towards even larger and more complex software systems has given rise to the socalled ‘software crisis’. Producing and maintaining software is consuming more and more resources in terms of both manpower and finance. Improvements in the way software is designed and implemented can reduce costs throughout the life cycle of the software. A computer-based system is described that uses graphical techniques to improve the visibility and structure of the software design, implementation and documentation. Automatic generation of the high-level language code from the graphical documentation ensures agreement between the two

ISSN:1744-683X    

DOI:10.1049/sm.1981.0005

出版商:IEE    

年代:1981

数据来源: IET

摘要:

The paper outlines the design and implementation of Strathnet, a local area network in the Department of Computer Science at Strathclyde University. Strathnet is based on the Ethernet system, and will be used for experimental work on local network architectures, particularly in comparison with a Ring system, before eventually providing a network service within the Department

ISSN:1744-683X    

DOI:10.1049/sm.1981.0007

出版商:IEE    

年代:1981

数据来源: IET