摘要:

AbstractApproaches to the development of scientific application software have matured over the past two decades and now constitute identifiable methodologies. Three software development methodologies are described, compared, and contrasted from the viewpoint of development effort, continued maintenance, and subsequent extension. Pertinent software aspects of the POLO‐FINITE system are described to provide an example of the software virtual machine approach to solve database, memory management, and processing module integration problems. Finally, possible extensions of the virtual machine concept are discussed as a means to further advance software development methodologie

ISSN:0038-0644    

DOI:10.1002/spe.4380121202

出版商:John Wiley&Sons, Ltd.    

年代:1982

数据来源: WILEY

摘要:

AbstractAn experimental software tool called FAST‐Fast Assembly Tool—has been used to evaluate the operational characteristics and range of application of the program translation technique known as meta‐assembly. It has been applied successfully in practice to a variety of different types of assembly problem and would appear to show some promise for the future in a microprocessor support context. The most significant aspects of the design, implementation and application of FAST are disc

ISSN:0038-0644    

DOI:10.1002/spe.4380121203

出版商:John Wiley&Sons, Ltd.    

年代:1982

数据来源: WILEY

摘要:

AbstractThis note illustrates the power of software interrupts (traps) and text diversions in document preparation languages by considering three difficult problems in typesetting: figure placement; setting text in arbitrary shapes; and balancing final columns in multi‐column layout. The solution of each of these in thenroffdocument preparation system is discussed, and an Appendix gives thenroffmacros which accomplish the task

ISSN:0038-0644    

DOI:10.1002/spe.4380121204

出版商:John Wiley&Sons, Ltd.    

年代:1982

数据来源: WILEY

摘要:

AbstractThe Gem system is an experimental computing facility that provides low cost, high speed, graphics‐oriented computing to between ten and sixteen simultaneous users. It provides many unusual facilities to its users and presents a user interface that is unique in its convenience and flexibility. The motivation for the system, its design and user experience are described. Possible future avenues of research are also outline

ISSN:0038-0644    

DOI:10.1002/spe.4380121205

出版商:John Wiley&Sons, Ltd.    

年代:1982

数据来源: WILEY

摘要:

AbstractIn this paper we describe a software subsystem that can be added to each of a set of physically interconnected UNIX or UNIX look‐alike systems, so as to construct a distributed system which is functionally indistinguishable at both the user and the program level from a conventional single‐processor UNIX system. The techniques used are applicable to a variety and multiplicity of both local and wide area networks, and enable all issues of inter‐processor communication, network protocols, etc., to be hidden. A brief account is given of experience with such a distributed system, which is currently operational on a set of PDPlls connected by a Cambridge Ring. The final sections compare our scheme to various precursor schemes and discuss its potential relevance to other operating sy

ISSN:0038-0644    

DOI:10.1002/spe.4380121206

出版商:John Wiley&Sons, Ltd.    

年代:1982

数据来源: WILEY

摘要:

AbstractIn this communication, a simplification is suggested for the coroutine extension of Pascal described by Kriz and Sandmayr. In addition to being simpler to implement, it is also more user‐friendly and secure because most of the strict sequence constraints on procedure invocations are lifted. The scheme uses the Pascal‐P compiler, without modification except for the addition of a few built‐in procedures, together with a macroassembler for Pcode preproce

ISSN:0038-0644    

DOI:10.1002/spe.4380121207

出版商:John Wiley&Sons, Ltd.    

年代:1982

数据来源: WILEY

ISSN:0038-0644    

DOI:10.1002/spe.4380121208

出版商:John Wiley&Sons, Ltd.    

年代:1982

数据来源: WILEY

ISSN:0038-0644    

DOI:10.1002/spe.4380121209

出版商:John Wiley&Sons, Ltd.    

年代:1982

数据来源: WILEY

ISSN:0038-0644    

DOI:10.1002/spe.4380121210

出版商:John Wiley&Sons, Ltd.    

年代:1982

数据来源: WILEY

ISSN:0038-0644    

DOI:10.1002/spe.4380121201

出版商:John Wiley&Sons, Ltd.    

年代:1982

数据来源: WILEY