https://ir.unisa.ac.za/handle/10500/24001 2026-05-06T12:54:03Z https://ir.unisa.ac.za/handle/10500/24312 An Interactive Graphical Array Trace Schach, Stephen R. data structure and its computer implementation. However, in the course of debugging a program written in a high-level language, the user is sometimes forced to try to understand the low-level implementation of his data structure, a task that may well be beyond his ability. In an attempt to obviate this problem a trace package has been written which allows a user at a TEKTRONIX Graphics Terminal to "see" arrays as two-dimensional data structures with rows and columns, and to examine interactively the contents of up to four arrays of any FORTRAN IV program while it is being executed. The package consists of a precompiler and a set of graphical routines, both designed to be fully portable. It has been used to debug programs with large arrays (which a standard line-by-line variables trace cannot comfortably handle). 1982-01-01T00:00:00Z https://ir.unisa.ac.za/handle/10500/24079 Micro-Code Implementation of Language Interpreters Roets, P. P. An evaluation is made of the improvement of language interpreters by coding recurring sequences of instructions in micro-code. The results of an experiment with PASCAL indicate that the increase in speed expected may not always be realised but that, somewhat surprisingly, micro-code may be used to reduce the effort of implementing an interpreter. 1982-01-01T00:00:00Z https://ir.unisa.ac.za/handle/10500/24008 The Design Objectives of Quadlisp Postma, Stef W. Quadlisp is a symbol manipulation language for sophisticated users, and it is an improper extension of Lisp 1.5 (in the same sense that Pascal is an improper extension of Algol). Elements from Lisp thus are basic to the language, but other objectives such as data-typing and general principles of modern language design have also been incorporated. Pertinent aspects of these considerations are discussed, followed by a discussion of the pragmatic considerations. Pragmatics relate to the use of the language on machines, or just by people as a tool for developing programs. 1982-01-01T00:00:00Z https://ir.unisa.ac.za/handle/10500/24007 The Relative Merits of Two Organisational Behaviour Models for Structuring a Management Information System Pirow, Peter The basic 'model' usually applied to the structure of MIS is that of Anthony. This paper investigates the use of the Paterson model as an alternative. This is approached from the theoretical standpoint, and reference is made to some practical situations requiring MIS. The paper discusses the relevant merits of the two models in each situation. 1982-01-01T00:00:00Z