[pt] Os testes realizados em equipamentos periféricos de computadores, após a fase de montagem, são geralmente complexos e demorados. Assim sendo, é necessário que várias máquinas sejam testadas simultaneamente, evitando- se a formação de um congestionamento na linha de produção. Em vista disso, partiu-se para a elaboração de um sistema de testes, organizado numa arquitetura de multimicroprocessamento tipo mestre-escravo, sendo mestre microcomputador e os escravos unidades processadoras autônomas inteligentes. Este sistema é capaz de testar várias máquinas em paralelo, mantendo a relação unidade produzidas versus tempo elevada, sem prejudicar a qualidade dos produtos. O trabalho aqui apresentado desenvolve o hardware e o software do sistema e mostra a sua aplicação como sistema de teste de transportadores de fita magnética. / [en] The tests performed on computers peripherical equipments, at the end of an assembly line, are very often complex and time-consuming. So, it is necessary to test many machines simultaneously, avoiding jamming in the assembly line. For this reason, a testing system was developed, organized in a multi-microprocessing architecture of the master- slave kind, where the master is a microcomputer, and the slaves are autonomous processor units. This system is capable of testing many machines in parallel, keeping high the factor produced units versus time, without affecting the quality of the final products. This thesis develop the hardware and the software of a such systems and describes its applications in testing magnetic-tape transports.

[pt] O projeto trata da conversão de um Terminal de Vídeo SCOPUS TVA-1052 num Microcomputador de uso geral, com sistema operacional CP/M. Esta conversão envolve modificações no hardware do Terminal e adaptação do sistema operacional CP/M mediante reprogramação da parte física de E/S. O sistema inicialmente terá autonomia para funcionar como uma unidade isolada de processamento, podendo ser ligado também a um computador de porte maior. Ele também será utilizado como satélite da rede de microcomputadores MULTIPUC em desenvolvimento no Laboratório de Engenharia de Sistemas de Computação (LESC) da PUC/RJ. / [en] This Project consists in the conversion of an Vídeo Terminal SCOPUS TVA-1052 into a Microcomputer of general purpose, with a CP/M operating system. This conversion involves changings in the Terminal hardware and implementation of the CP/M system, by reprogramming the basic I/O module. At first the system will be autonomus, functioning as an isolated processing unit, but it may be also linked to a larger computer. Afterwards, it will be used as a satellite of the MULTIPUC microcomputer network, wich now is being developed in the Computer Systems Engineering Laboratory (LESC) at the Catholic University of Rio de Janeiro (PUC/RJ).

Information security has become a much discussed subject all over the world in the last few years. This is because information security is no longer a luxury, but a necessity in all organisations. The securing of information is not an easy task because information security is flexible and always seems to be in a state of development. This means that information security has undergone different development changes due to new technologies in the past few years. Information security became prominent around 50 years ago and had a very strict technical approach. In this approach, industries mainly worked with mainframes, with little or no concept of management aspects such as security policies or awareness programmes. The technical approach thus included little or no management effort in terms of information security. The need to manage information security began when new technologies such as the Internet and the World Wide Web were introduced to the information security environment. This caused information security to shift from the technical to the more managerial approach. The move of information security from the technical to the managerial approach may be identified through different development trends. These development trends have occurred mainly to improve information security management in any organisation. The primary purpose of this dissertation is therefore to identify and investigate different development trends that have an influence on information security, especially from a managerial point of view. / Prof. J.H.P. Eloff

Master of Science

[pt] O trabalho consiste no projeto de um microsistema programável - um microcomputador - destinado a controle de processos industriais e que possui como núcleo uma unidade central de processamento em LSI. A capacidade dessa unidade é expandida através do uso de um controle externo microprogramado que atua apenas nas operações de entrada/saída e no tratamento de interrupções. O resultado obtido do microcomputador ao processo através de interfaces de pouca complexidade. / [en] A design is given for a programmable microsystem - a microcomputer - destined for the control of industrial processes. The nucleus is an LSI central processor. This unit is expanded through the use of a microprogrammed external control which works only with input-output operations and interrupt handling. The resulting system has an 1/0 structure that interfces easily with the process.

<p> The "microelectronic revolution" and the accompanying decrease in the cost of semiconductor memory has increased the availability of raster-scan graphical displays, yet, as pointed out in a recent survey [BAE79], the implementation of graphics software for raster-scan systems has lagged behind that for random-scan systems. The aim of the work described in this report has been to apply random-scan display techniques to a system employing a relatively inexpensive raster-scan device. The system, incorporating a segmented display file processor, is implemented on a KIM^TM microcomputer. The display device is composed of a Micro Technology Unlimited^TM (MTU) 8K Visable Memory^TM (VM) video board and a standard TV monitor.</p> / Thesis / Master of Science (MSc)

No description available.

International Telemetering Conference Proceedings / October 29-November 02, 1990 / Riviera Hotel and Convention Center, Las Vegas, Nevada / Modem microcomputers are proving to be viable hosts for telemetry functions, including data simulators. A specialized high-performance hardware architecture for generating and processing simulator data can be implemented on an add-in card for the microcomputer. Support software implemented on the host provides a simple, high-quality human interface with a high degree of user programmability. Based on this strategy, the Physical Science Laboratory at New Mexico State University (PSL) is developing a Programmable PCM Data Simulator for microcomputer hosts. Specifications and hardware/software architectures for PSL’s Programmable PCM Data Simulator are discussed, as well as its interactive user interface.

This thesis dwells on the issue of using personal computers in real-time control and data acquisition applications. A data acquisition and control system is designed to acquire temperature, humidity, air volume and solar radiation data and control the inside temperature, air volume and maximizes solar radiation inside an ecologically closed test structure. The focus is on an Intel 8088 or 80286 based personal computer. A personal computer is used for development of the software and the final real-time system runs on a PC as well. This eliminates the need of expensive cross compilers and in-circuit emulators. A control and data acquisition task is selected and a solution using an IBM compatible personal computer is demonstrated. Various advantages and disadvantages for selecting the personal computer and development software and environment are discussed. Solutions to various problems encountered are discussed.

O consumo domiciliar de microcomputadores cresceu de forma acelerado nos últimos anos. Apesar de grupos com determinadas características socioeconômicas terem um consumo maior de computadores, o consumo vem aumentando em todos os grupos. Ou seja, mesmo com diferenças grandes, o consumo de computadores não é mais uma exclusividade dos mais ricos, dos mais bem instruídos ou de determinadas regiões do país. Os modelos Probit e double-hurdle se mostraram adequados para analisar o consumo de computadores no Brasil. O modelo Probit ajustou bem os dados na análise da presença de um computador no domicílio. Já para a despesa com computador, o modelo double-hurdle se mostrou melhor que o modelo Tobit, uma vez que este separa a análise do processo de decisão de compra em dois, separando a decisão de gastar da decisão de quanto gastar. / Household consumption of microcomputers grew up fast in recent years. Despite some socioeconomic groups take highercomputer consumption, consumption is increasing in all groups. In other words, even with large differences, the consumption of computers is no longer uniqueness of wealthier, better educated or at certain regions of the country. Probit and double-hurdle models were suitable for analyzing the consume of computers in Brazil. The Probit model adjusted well the data set in the analysis of the presence of a computer at home. For the computer spending the double-hurdle model proved better than Tobit because separates the analysis of the purchase decision process in two, separating the decision to spend from the decision of how much spend.