ISSN:0038-0644    

DOI:10.1002/spe.4380140102

出版商:John Wiley&Sons, Ltd.    

年代:1984

数据来源: WILEY

摘要:

AbstractThree currently available concurrent language systems, Pascal‐Plus, occam and Edison, are used to implement a controller for a robot arm. The robot arm allows real parallelism of operation within the movements of the arm. The feasibility and restrictions placed upon the resultant solution for each of the language systems is then analysed and discussed. A Petri‐net solution is also presented for the generalized problem and it is shown that each of the solutions is a different folding of the general

ISSN:0038-0644    

DOI:10.1002/spe.4380140103

出版商:John Wiley&Sons, Ltd.    

年代:1984

数据来源: WILEY

摘要:

AbstractA portable compiler can be constructed by letting it generate code for a virtual machine, which is then implemented on the real target machines. The design of a virtual machine which is especially suitable as a target machine for compiled Ada programs is described. The main design goals, implementability on mini‐computers and portability, are discussed and the resulting design is described in some detail. Some implementation strategies for the machine are proposed and the feasibility of the virtual machine approach is discusse

ISSN:0038-0644    

DOI:10.1002/spe.4380140104

出版商:John Wiley&Sons, Ltd.    

年代:1984

数据来源: WILEY

摘要:

AbstractWe describe the operating system Perseus, developed as part of a study into the issues of computer communications and their impact on operating system and programming language design. Perseus was designed to be portable by virtue of its kernel‐based structure and its implementation in Pascal. In particular, machine‐dependent code is limited to the kernel and most operating systems functions are provided by server processes, running in user mode. Perseus was designed to evolve into a distributed operating system by virtue of its interprocess communication facilities, based on message‐passing. This paper presents an overview of the system and gives an assessment of how far it satisfied its original goals. Specifically, we evaluate its interprocess communication facilities and kernel‐based structure, and discuss its portability. We close with a brief history of the project, pointing out major milestones and stumbling

ISSN:0038-0644    

DOI:10.1002/spe.4380140105

出版商:John Wiley&Sons, Ltd.    

年代:1984

数据来源: WILEY

摘要:

AbstractThis is a description of the integrated Persistent Object Management System (POMS) for the language PS‐algol. The objective of POMS is to provide an implementation of the PS‐algol persistent heap1entirely by means of procedures written in PS‐

ISSN:0038-0644    

DOI:10.1002/spe.4380140106

出版商:John Wiley&Sons, Ltd.    

年代:1984

数据来源: WILEY

摘要:

AbstractAndra is a modern text editor and formatter designed for the personal computer Lilith. Lilith was developed at the ETH by Prof. N. Wirth. The interactive part of Andra makes extensive use of Lilith's characteristic features, namely its high‐resolution raster scan display and the mouse. The printer component of Andra allows the creation of high‐quality hardcopies on a laser printer. The Andra program is written in the language Modul

ISSN:0038-0644    

DOI:10.1002/spe.4380140107

出版商:John Wiley&Sons, Ltd.    

年代:1984

数据来源: WILEY

ISSN:0038-0644    

DOI:10.1002/spe.4380140101

出版商:John Wiley&Sons, Ltd.    

年代:1984

数据来源: WILEY